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bccafa26 | 1 | /* Output Dwarf2 format symbol table information from GCC. |
07576557 | 2 | Copyright (C) 1992, 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, |
cfaf579d | 3 | 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. |
0dbd1c74 | 4 | Contributed by Gary Funck (gary@intrepid.com). |
5 | Derived from DWARF 1 implementation of Ron Guilmette (rfg@monkeys.com). | |
df78b73b | 6 | Extensively modified by Jason Merrill (jason@cygnus.com). |
30ade641 | 7 | |
f12b58b3 | 8 | This file is part of GCC. |
30ade641 | 9 | |
f12b58b3 | 10 | GCC is free software; you can redistribute it and/or modify it under |
11 | the terms of the GNU General Public License as published by the Free | |
8c4c00c1 | 12 | Software Foundation; either version 3, or (at your option) any later |
f12b58b3 | 13 | version. |
30ade641 | 14 | |
f12b58b3 | 15 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
16 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
17 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
18 | for more details. | |
30ade641 | 19 | |
20 | You should have received a copy of the GNU General Public License | |
8c4c00c1 | 21 | along with GCC; see the file COPYING3. If not see |
22 | <http://www.gnu.org/licenses/>. */ | |
30ade641 | 23 | |
80b7bd06 | 24 | /* TODO: Emit .debug_line header even when there are no functions, since |
5c65b85a | 25 | the file numbers are used by .debug_info. Alternately, leave |
26 | out locations for types and decls. | |
27 | Avoid talking about ctors and op= for PODs. | |
28 | Factor out common prologue sequences into multiple CIEs. */ | |
29 | ||
8a8bfbe7 | 30 | /* The first part of this file deals with the DWARF 2 frame unwind |
31 | information, which is also used by the GCC efficient exception handling | |
32 | mechanism. The second part, controlled only by an #ifdef | |
33 | DWARF2_DEBUGGING_INFO, deals with the other DWARF 2 debugging | |
34 | information. */ | |
35 | ||
7734155f | 36 | /* DWARF2 Abbreviation Glossary: |
37 | ||
38 | CFA = Canonical Frame Address | |
39 | a fixed address on the stack which identifies a call frame. | |
40 | We define it to be the value of SP just before the call insn. | |
41 | The CFA register and offset, which may change during the course | |
42 | of the function, are used to calculate its value at runtime. | |
43 | ||
44 | CFI = Call Frame Instruction | |
45 | an instruction for the DWARF2 abstract machine | |
46 | ||
47 | CIE = Common Information Entry | |
48 | information describing information common to one or more FDEs | |
49 | ||
50 | DIE = Debugging Information Entry | |
51 | ||
52 | FDE = Frame Description Entry | |
53 | information describing the stack call frame, in particular, | |
54 | how to restore registers | |
55 | ||
56 | DW_CFA_... = DWARF2 CFA call frame instruction | |
57 | DW_TAG_... = DWARF2 DIE tag */ | |
58 | ||
d757b8c9 | 59 | #include "config.h" |
405711de | 60 | #include "system.h" |
805e22b2 | 61 | #include "coretypes.h" |
62 | #include "tm.h" | |
30ade641 | 63 | #include "tree.h" |
af225e7d | 64 | #include "version.h" |
30ade641 | 65 | #include "flags.h" |
ef258422 | 66 | #include "real.h" |
30ade641 | 67 | #include "rtl.h" |
68 | #include "hard-reg-set.h" | |
69 | #include "regs.h" | |
70 | #include "insn-config.h" | |
71 | #include "reload.h" | |
df4b504c | 72 | #include "function.h" |
30ade641 | 73 | #include "output.h" |
ec1e49cc | 74 | #include "expr.h" |
d8fc4d0b | 75 | #include "libfuncs.h" |
8a8bfbe7 | 76 | #include "except.h" |
2c133160 | 77 | #include "dwarf2.h" |
744d3441 | 78 | #include "dwarf2out.h" |
ca98eb0a | 79 | #include "dwarf2asm.h" |
12874aaf | 80 | #include "toplev.h" |
eacbfaac | 81 | #include "varray.h" |
cff53614 | 82 | #include "ggc.h" |
19f716e5 | 83 | #include "md5.h" |
39697b37 | 84 | #include "tm_p.h" |
a587b03b | 85 | #include "diagnostic.h" |
b896d81b | 86 | #include "debug.h" |
02c8b767 | 87 | #include "target.h" |
d19bd1f0 | 88 | #include "langhooks.h" |
51e8c210 | 89 | #include "hashtab.h" |
5bd74231 | 90 | #include "cgraph.h" |
2b49746a | 91 | #include "input.h" |
30ade641 | 92 | |
f76df888 | 93 | #ifdef DWARF2_DEBUGGING_INFO |
8ec3a57b | 94 | static void dwarf2out_source_line (unsigned int, const char *); |
f76df888 | 95 | #endif |
96 | ||
34986748 | 97 | #ifndef DWARF2_FRAME_INFO |
98 | # ifdef DWARF2_DEBUGGING_INFO | |
99 | # define DWARF2_FRAME_INFO \ | |
100 | (write_symbols == DWARF2_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG) | |
101 | # else | |
102 | # define DWARF2_FRAME_INFO 0 | |
103 | # endif | |
104 | #endif | |
105 | ||
c98ee857 | 106 | /* Map register numbers held in the call frame info that gcc has |
107 | collected using DWARF_FRAME_REGNUM to those that should be output in | |
108 | .debug_frame and .eh_frame. */ | |
109 | #ifndef DWARF2_FRAME_REG_OUT | |
110 | #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO) | |
111 | #endif | |
112 | ||
c1203b1c | 113 | /* Save the result of dwarf2out_do_frame across PCH. */ |
114 | static GTY(()) bool saved_do_cfi_asm = 0; | |
115 | ||
d757b8c9 | 116 | /* Decide whether we want to emit frame unwind information for the current |
117 | translation unit. */ | |
118 | ||
119 | int | |
8ec3a57b | 120 | dwarf2out_do_frame (void) |
d757b8c9 | 121 | { |
34986748 | 122 | /* We want to emit correct CFA location expressions or lists, so we |
123 | have to return true if we're going to output debug info, even if | |
124 | we're not going to output frame or unwind info. */ | |
d757b8c9 | 125 | return (write_symbols == DWARF2_DEBUG |
8d60d2bc | 126 | || write_symbols == VMS_AND_DWARF2_DEBUG |
c1203b1c | 127 | || DWARF2_FRAME_INFO || saved_do_cfi_asm |
d757b8c9 | 128 | #ifdef DWARF2_UNWIND_INFO |
34986748 | 129 | || (DWARF2_UNWIND_INFO |
130 | && (flag_unwind_tables | |
131 | || (flag_exceptions && ! USING_SJLJ_EXCEPTIONS))) | |
d757b8c9 | 132 | #endif |
133 | ); | |
134 | } | |
135 | ||
3dcd5df1 | 136 | /* Decide whether to emit frame unwind via assembler directives. */ |
137 | ||
138 | int | |
139 | dwarf2out_do_cfi_asm (void) | |
140 | { | |
141 | int enc; | |
142 | ||
90a47a46 | 143 | #ifdef MIPS_DEBUGGING_INFO |
144 | return false; | |
145 | #endif | |
3dcd5df1 | 146 | if (!flag_dwarf2_cfi_asm || !dwarf2out_do_frame ()) |
147 | return false; | |
c1203b1c | 148 | if (saved_do_cfi_asm || !eh_personality_libfunc) |
3dcd5df1 | 149 | return true; |
150 | if (!HAVE_GAS_CFI_PERSONALITY_DIRECTIVE) | |
151 | return false; | |
152 | ||
153 | /* Make sure the personality encoding is one the assembler can support. | |
154 | In particular, aligned addresses can't be handled. */ | |
155 | enc = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/2,/*global=*/1); | |
156 | if ((enc & 0x70) != 0 && (enc & 0x70) != DW_EH_PE_pcrel) | |
157 | return false; | |
158 | enc = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/0,/*global=*/0); | |
159 | if ((enc & 0x70) != 0 && (enc & 0x70) != DW_EH_PE_pcrel) | |
160 | return false; | |
161 | ||
c1203b1c | 162 | saved_do_cfi_asm = true; |
3dcd5df1 | 163 | return true; |
164 | } | |
165 | ||
13c14f1c | 166 | /* The size of the target's pointer type. */ |
167 | #ifndef PTR_SIZE | |
168 | #define PTR_SIZE (POINTER_SIZE / BITS_PER_UNIT) | |
169 | #endif | |
170 | ||
1f3233d1 | 171 | /* Array of RTXes referenced by the debugging information, which therefore |
172 | must be kept around forever. */ | |
62aedc4c | 173 | static GTY(()) VEC(rtx,gc) *used_rtx_array; |
1f3233d1 | 174 | |
175 | /* A pointer to the base of a list of incomplete types which might be | |
22230dd1 | 176 | completed at some later time. incomplete_types_list needs to be a |
177 | VEC(tree,gc) because we want to tell the garbage collector about | |
178 | it. */ | |
179 | static GTY(()) VEC(tree,gc) *incomplete_types; | |
1f3233d1 | 180 | |
181 | /* A pointer to the base of a table of references to declaration | |
182 | scopes. This table is a display which tracks the nesting | |
183 | of declaration scopes at the current scope and containing | |
184 | scopes. This table is used to find the proper place to | |
185 | define type declaration DIE's. */ | |
4a940e75 | 186 | static GTY(()) VEC(tree,gc) *decl_scope_table; |
1f3233d1 | 187 | |
2f14b1f9 | 188 | /* Pointers to various DWARF2 sections. */ |
189 | static GTY(()) section *debug_info_section; | |
190 | static GTY(()) section *debug_abbrev_section; | |
191 | static GTY(()) section *debug_aranges_section; | |
192 | static GTY(()) section *debug_macinfo_section; | |
193 | static GTY(()) section *debug_line_section; | |
194 | static GTY(()) section *debug_loc_section; | |
195 | static GTY(()) section *debug_pubnames_section; | |
af84796a | 196 | static GTY(()) section *debug_pubtypes_section; |
2f14b1f9 | 197 | static GTY(()) section *debug_str_section; |
198 | static GTY(()) section *debug_ranges_section; | |
d08d29c0 | 199 | static GTY(()) section *debug_frame_section; |
2f14b1f9 | 200 | |
e5530d32 | 201 | /* How to start an assembler comment. */ |
202 | #ifndef ASM_COMMENT_START | |
203 | #define ASM_COMMENT_START ";#" | |
204 | #endif | |
205 | ||
30ade641 | 206 | typedef struct dw_cfi_struct *dw_cfi_ref; |
207 | typedef struct dw_fde_struct *dw_fde_ref; | |
208 | typedef union dw_cfi_oprnd_struct *dw_cfi_oprnd_ref; | |
30ade641 | 209 | |
210 | /* Call frames are described using a sequence of Call Frame | |
211 | Information instructions. The register number, offset | |
212 | and address fields are provided as possible operands; | |
213 | their use is selected by the opcode field. */ | |
ec1e49cc | 214 | |
573aba85 | 215 | enum dw_cfi_oprnd_type { |
216 | dw_cfi_oprnd_unused, | |
217 | dw_cfi_oprnd_reg_num, | |
218 | dw_cfi_oprnd_offset, | |
219 | dw_cfi_oprnd_addr, | |
220 | dw_cfi_oprnd_loc | |
221 | }; | |
222 | ||
fb1e4f4a | 223 | typedef union GTY(()) dw_cfi_oprnd_struct { |
da72c083 | 224 | unsigned int GTY ((tag ("dw_cfi_oprnd_reg_num"))) dw_cfi_reg_num; |
3d867824 | 225 | HOST_WIDE_INT GTY ((tag ("dw_cfi_oprnd_offset"))) dw_cfi_offset; |
573aba85 | 226 | const char * GTY ((tag ("dw_cfi_oprnd_addr"))) dw_cfi_addr; |
227 | struct dw_loc_descr_struct * GTY ((tag ("dw_cfi_oprnd_loc"))) dw_cfi_loc; | |
ec1e49cc | 228 | } |
30ade641 | 229 | dw_cfi_oprnd; |
230 | ||
fb1e4f4a | 231 | typedef struct GTY(()) dw_cfi_struct { |
ec1e49cc | 232 | dw_cfi_ref dw_cfi_next; |
233 | enum dwarf_call_frame_info dw_cfi_opc; | |
8ec3a57b | 234 | dw_cfi_oprnd GTY ((desc ("dw_cfi_oprnd1_desc (%1.dw_cfi_opc)"))) |
573aba85 | 235 | dw_cfi_oprnd1; |
8ec3a57b | 236 | dw_cfi_oprnd GTY ((desc ("dw_cfi_oprnd2_desc (%1.dw_cfi_opc)"))) |
573aba85 | 237 | dw_cfi_oprnd2; |
ec1e49cc | 238 | } |
30ade641 | 239 | dw_cfi_node; |
240 | ||
4b72e226 | 241 | /* This is how we define the location of the CFA. We use to handle it |
242 | as REG + OFFSET all the time, but now it can be more complex. | |
243 | It can now be either REG + CFA_OFFSET or *(REG + BASE_OFFSET) + CFA_OFFSET. | |
f80d1bcd | 244 | Instead of passing around REG and OFFSET, we pass a copy |
4b72e226 | 245 | of this structure. */ |
fb1e4f4a | 246 | typedef struct GTY(()) cfa_loc { |
3d867824 | 247 | HOST_WIDE_INT offset; |
248 | HOST_WIDE_INT base_offset; | |
12d886b8 | 249 | unsigned int reg; |
4b72e226 | 250 | int indirect; /* 1 if CFA is accessed via a dereference. */ |
251 | } dw_cfa_location; | |
252 | ||
30ade641 | 253 | /* All call frame descriptions (FDE's) in the GCC generated DWARF |
752e49ca | 254 | refer to a single Common Information Entry (CIE), defined at |
dae39efc | 255 | the beginning of the .debug_frame section. This use of a single |
30ade641 | 256 | CIE obviates the need to keep track of multiple CIE's |
257 | in the DWARF generation routines below. */ | |
ec1e49cc | 258 | |
fb1e4f4a | 259 | typedef struct GTY(()) dw_fde_struct { |
2f9fc8ef | 260 | tree decl; |
1e034a40 | 261 | const char *dw_fde_begin; |
262 | const char *dw_fde_current_label; | |
263 | const char *dw_fde_end; | |
1897b881 | 264 | const char *dw_fde_hot_section_label; |
265 | const char *dw_fde_hot_section_end_label; | |
266 | const char *dw_fde_unlikely_section_label; | |
267 | const char *dw_fde_unlikely_section_end_label; | |
268 | bool dw_fde_switched_sections; | |
ec1e49cc | 269 | dw_cfi_ref dw_fde_cfi; |
df4b504c | 270 | unsigned funcdef_number; |
27a7a23a | 271 | HOST_WIDE_INT stack_realignment; |
272 | /* Dynamic realign argument pointer register. */ | |
273 | unsigned int drap_reg; | |
274 | /* Virtual dynamic realign argument pointer register. */ | |
275 | unsigned int vdrap_reg; | |
04396483 | 276 | unsigned all_throwers_are_sibcalls : 1; |
df4b504c | 277 | unsigned nothrow : 1; |
278 | unsigned uses_eh_lsda : 1; | |
27a7a23a | 279 | /* Whether we did stack realign in this call frame. */ |
280 | unsigned stack_realign : 1; | |
281 | /* Whether dynamic realign argument pointer register has been saved. */ | |
282 | unsigned drap_reg_saved: 1; | |
ec1e49cc | 283 | } |
30ade641 | 284 | dw_fde_node; |
285 | ||
1e625a2e | 286 | /* Maximum size (in bytes) of an artificially generated label. */ |
30ade641 | 287 | #define MAX_ARTIFICIAL_LABEL_BYTES 30 |
288 | ||
aaa408cd | 289 | /* The size of addresses as they appear in the Dwarf 2 data. |
290 | Some architectures use word addresses to refer to code locations, | |
291 | but Dwarf 2 info always uses byte addresses. On such machines, | |
292 | Dwarf 2 addresses need to be larger than the architecture's | |
293 | pointers. */ | |
294 | #ifndef DWARF2_ADDR_SIZE | |
295 | #define DWARF2_ADDR_SIZE (POINTER_SIZE / BITS_PER_UNIT) | |
296 | #endif | |
297 | ||
a3899bb7 | 298 | /* The size in bytes of a DWARF field indicating an offset or length |
aaa408cd | 299 | relative to a debug info section, specified to be 4 bytes in the |
300 | DWARF-2 specification. The SGI/MIPS ABI defines it to be the same | |
b6ce7963 | 301 | as PTR_SIZE. */ |
ec1e49cc | 302 | |
a3899bb7 | 303 | #ifndef DWARF_OFFSET_SIZE |
304 | #define DWARF_OFFSET_SIZE 4 | |
305 | #endif | |
306 | ||
65bdc57c | 307 | /* According to the (draft) DWARF 3 specification, the initial length |
308 | should either be 4 or 12 bytes. When it's 12 bytes, the first 4 | |
309 | bytes are 0xffffffff, followed by the length stored in the next 8 | |
310 | bytes. | |
311 | ||
312 | However, the SGI/MIPS ABI uses an initial length which is equal to | |
313 | DWARF_OFFSET_SIZE. It is defined (elsewhere) accordingly. */ | |
314 | ||
315 | #ifndef DWARF_INITIAL_LENGTH_SIZE | |
316 | #define DWARF_INITIAL_LENGTH_SIZE (DWARF_OFFSET_SIZE == 4 ? 4 : 12) | |
317 | #endif | |
318 | ||
be6eb971 | 319 | #define DWARF_VERSION 2 |
320 | ||
a3899bb7 | 321 | /* Round SIZE up to the nearest BOUNDARY. */ |
322 | #define DWARF_ROUND(SIZE,BOUNDARY) \ | |
e711a040 | 323 | ((((SIZE) + (BOUNDARY) - 1) / (BOUNDARY)) * (BOUNDARY)) |
30ade641 | 324 | |
30ade641 | 325 | /* Offsets recorded in opcodes are a multiple of this alignment factor. */ |
78ac74b9 | 326 | #ifndef DWARF_CIE_DATA_ALIGNMENT |
df78b73b | 327 | #ifdef STACK_GROWS_DOWNWARD |
7eb04d1c | 328 | #define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD)) |
df78b73b | 329 | #else |
7eb04d1c | 330 | #define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD) |
df78b73b | 331 | #endif |
8c3f468d | 332 | #endif |
30ade641 | 333 | |
04da8de9 | 334 | /* CIE identifier. */ |
335 | #if HOST_BITS_PER_WIDE_INT >= 64 | |
336 | #define DWARF_CIE_ID \ | |
337 | (unsigned HOST_WIDE_INT) (DWARF_OFFSET_SIZE == 4 ? DW_CIE_ID : DW64_CIE_ID) | |
338 | #else | |
339 | #define DWARF_CIE_ID DW_CIE_ID | |
340 | #endif | |
341 | ||
8a8bfbe7 | 342 | /* A pointer to the base of a table that contains frame description |
343 | information for each routine. */ | |
573aba85 | 344 | static GTY((length ("fde_table_allocated"))) dw_fde_ref fde_table; |
30ade641 | 345 | |
8a8bfbe7 | 346 | /* Number of elements currently allocated for fde_table. */ |
909be935 | 347 | static GTY(()) unsigned fde_table_allocated; |
6efd403b | 348 | |
8a8bfbe7 | 349 | /* Number of elements in fde_table currently in use. */ |
9105005a | 350 | static GTY(()) unsigned fde_table_in_use; |
30ade641 | 351 | |
8a8bfbe7 | 352 | /* Size (in elements) of increments by which we may expand the |
353 | fde_table. */ | |
354 | #define FDE_TABLE_INCREMENT 256 | |
30ade641 | 355 | |
a3f14923 | 356 | /* Get the current fde_table entry we should use. */ |
357 | ||
358 | static inline dw_fde_ref | |
359 | current_fde (void) | |
360 | { | |
361 | return fde_table_in_use ? &fde_table[fde_table_in_use - 1] : NULL; | |
362 | } | |
363 | ||
6efd403b | 364 | /* A list of call frame insns for the CIE. */ |
573aba85 | 365 | static GTY(()) dw_cfi_ref cie_cfi_head; |
6efd403b | 366 | |
38ac91bf | 367 | #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO) |
30ade641 | 368 | /* Some DWARF extensions (e.g., MIPS/SGI) implement a subprogram |
369 | attribute that accelerates the lookup of the FDE associated | |
f80d1bcd | 370 | with the subprogram. This variable holds the table index of the FDE |
30ade641 | 371 | associated with the current function (body) definition. */ |
372 | static unsigned current_funcdef_fde; | |
38ac91bf | 373 | #endif |
30ade641 | 374 | |
fb1e4f4a | 375 | struct GTY(()) indirect_string_node { |
573aba85 | 376 | const char *str; |
80b7bd06 | 377 | unsigned int refcount; |
bc620c5c | 378 | enum dwarf_form form; |
80b7bd06 | 379 | char *label; |
380 | }; | |
381 | ||
573aba85 | 382 | static GTY ((param_is (struct indirect_string_node))) htab_t debug_str_hash; |
383 | ||
384 | static GTY(()) int dw2_string_counter; | |
9105005a | 385 | static GTY(()) unsigned long dwarf2out_cfi_label_num; |
573aba85 | 386 | |
af30c139 | 387 | /* True if the compilation unit places functions in more than one section. */ |
388 | static GTY(()) bool have_multiple_function_sections = false; | |
389 | ||
390 | /* Whether the default text and cold text sections have been used at all. */ | |
391 | ||
392 | static GTY(()) bool text_section_used = false; | |
393 | static GTY(()) bool cold_text_section_used = false; | |
394 | ||
395 | /* The default cold text section. */ | |
396 | static GTY(()) section *cold_text_section; | |
397 | ||
573aba85 | 398 | #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO) |
399 | ||
30ade641 | 400 | /* Forward declarations for functions defined in this file. */ |
ec1e49cc | 401 | |
8ec3a57b | 402 | static char *stripattributes (const char *); |
403 | static const char *dwarf_cfi_name (unsigned); | |
404 | static dw_cfi_ref new_cfi (void); | |
405 | static void add_cfi (dw_cfi_ref *, dw_cfi_ref); | |
406 | static void add_fde_cfi (const char *, dw_cfi_ref); | |
407 | static void lookup_cfa_1 (dw_cfi_ref, dw_cfa_location *); | |
408 | static void lookup_cfa (dw_cfa_location *); | |
3d867824 | 409 | static void reg_save (const char *, unsigned, unsigned, HOST_WIDE_INT); |
bf780b7e | 410 | #ifdef DWARF2_UNWIND_INFO |
8ec3a57b | 411 | static void initial_return_save (rtx); |
bf780b7e | 412 | #endif |
2f87ccae | 413 | static HOST_WIDE_INT stack_adjust_offset (const_rtx, HOST_WIDE_INT, |
414 | HOST_WIDE_INT); | |
8ec3a57b | 415 | static void output_cfi (dw_cfi_ref, dw_fde_ref, int); |
fb39ff6e | 416 | static void output_cfi_directive (dw_cfi_ref); |
8ec3a57b | 417 | static void output_call_frame_info (int); |
af30c139 | 418 | static void dwarf2out_note_section_used (void); |
535fcfa4 | 419 | static void dwarf2out_stack_adjust (rtx, bool); |
fe3cf4b3 | 420 | static void dwarf2out_args_size_adjust (HOST_WIDE_INT, const char *); |
8ec3a57b | 421 | static void flush_queued_reg_saves (void); |
5493cb9a | 422 | static bool clobbers_queued_reg_save (const_rtx); |
8ec3a57b | 423 | static void dwarf2out_frame_debug_expr (rtx, const char *); |
30ade641 | 424 | |
4b72e226 | 425 | /* Support for complex CFA locations. */ |
8ec3a57b | 426 | static void output_cfa_loc (dw_cfi_ref); |
fb39ff6e | 427 | static void output_cfa_loc_raw (dw_cfi_ref); |
8ec3a57b | 428 | static void get_cfa_from_loc_descr (dw_cfa_location *, |
429 | struct dw_loc_descr_struct *); | |
4b72e226 | 430 | static struct dw_loc_descr_struct *build_cfa_loc |
89fa767a | 431 | (dw_cfa_location *, HOST_WIDE_INT); |
27a7a23a | 432 | static struct dw_loc_descr_struct *build_cfa_aligned_loc |
433 | (HOST_WIDE_INT, HOST_WIDE_INT); | |
8ec3a57b | 434 | static void def_cfa_1 (const char *, dw_cfa_location *); |
4b72e226 | 435 | |
ca98eb0a | 436 | /* How to start an assembler comment. */ |
437 | #ifndef ASM_COMMENT_START | |
438 | #define ASM_COMMENT_START ";#" | |
30ade641 | 439 | #endif |
440 | ||
a3899bb7 | 441 | /* Data and reference forms for relocatable data. */ |
442 | #define DW_FORM_data (DWARF_OFFSET_SIZE == 8 ? DW_FORM_data8 : DW_FORM_data4) | |
443 | #define DW_FORM_ref (DWARF_OFFSET_SIZE == 8 ? DW_FORM_ref8 : DW_FORM_ref4) | |
444 | ||
702620e0 | 445 | #ifndef DEBUG_FRAME_SECTION |
446 | #define DEBUG_FRAME_SECTION ".debug_frame" | |
30ade641 | 447 | #endif |
30ade641 | 448 | |
d58978a6 | 449 | #ifndef FUNC_BEGIN_LABEL |
450 | #define FUNC_BEGIN_LABEL "LFB" | |
30ade641 | 451 | #endif |
8c3f468d | 452 | |
d58978a6 | 453 | #ifndef FUNC_END_LABEL |
454 | #define FUNC_END_LABEL "LFE" | |
30ade641 | 455 | #endif |
8c3f468d | 456 | |
2f9fc8ef | 457 | #ifndef FRAME_BEGIN_LABEL |
48ead6eb | 458 | #define FRAME_BEGIN_LABEL "Lframe" |
2f9fc8ef | 459 | #endif |
19bce576 | 460 | #define CIE_AFTER_SIZE_LABEL "LSCIE" |
461 | #define CIE_END_LABEL "LECIE" | |
ca98eb0a | 462 | #define FDE_LABEL "LSFDE" |
463 | #define FDE_AFTER_SIZE_LABEL "LASFDE" | |
19bce576 | 464 | #define FDE_END_LABEL "LEFDE" |
3740694f | 465 | #define LINE_NUMBER_BEGIN_LABEL "LSLT" |
466 | #define LINE_NUMBER_END_LABEL "LELT" | |
467 | #define LN_PROLOG_AS_LABEL "LASLTP" | |
468 | #define LN_PROLOG_END_LABEL "LELTP" | |
19f716e5 | 469 | #define DIE_LABEL_PREFIX "DW" |
30ade641 | 470 | |
212538c2 | 471 | /* The DWARF 2 CFA column which tracks the return address. Normally this |
6efd403b | 472 | is the column for PC, or the first column after all of the hard |
473 | registers. */ | |
212538c2 | 474 | #ifndef DWARF_FRAME_RETURN_COLUMN |
6efd403b | 475 | #ifdef PC_REGNUM |
8ec3a57b | 476 | #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM) |
6efd403b | 477 | #else |
8ec3a57b | 478 | #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGISTERS |
6efd403b | 479 | #endif |
212538c2 | 480 | #endif |
481 | ||
482 | /* The mapping from gcc register number to DWARF 2 CFA column number. By | |
df78b73b | 483 | default, we just provide columns for all registers. */ |
212538c2 | 484 | #ifndef DWARF_FRAME_REGNUM |
df78b73b | 485 | #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG) |
212538c2 | 486 | #endif |
8c3f468d | 487 | \f |
d757b8c9 | 488 | /* Hook used by __throw. */ |
489 | ||
490 | rtx | |
8ec3a57b | 491 | expand_builtin_dwarf_sp_column (void) |
d757b8c9 | 492 | { |
963e1d38 | 493 | unsigned int dwarf_regnum = DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM); |
c98ee857 | 494 | return GEN_INT (DWARF2_FRAME_REG_OUT (dwarf_regnum, 1)); |
d757b8c9 | 495 | } |
496 | ||
ec1e49cc | 497 | /* Return a pointer to a copy of the section string name S with all |
1bfb8e27 | 498 | attributes stripped off, and an asterisk prepended (for assemble_name). */ |
ec1e49cc | 499 | |
500 | static inline char * | |
8ec3a57b | 501 | stripattributes (const char *s) |
30ade641 | 502 | { |
4c36ffe6 | 503 | char *stripped = XNEWVEC (char, strlen (s) + 2); |
ec1e49cc | 504 | char *p = stripped; |
505 | ||
1bfb8e27 | 506 | *p++ = '*'; |
507 | ||
508 | while (*s && *s != ',') | |
509 | *p++ = *s++; | |
ec1e49cc | 510 | |
30ade641 | 511 | *p = '\0'; |
512 | return stripped; | |
513 | } | |
514 | ||
dd5e1e90 | 515 | /* MEM is a memory reference for the register size table, each element of |
516 | which has mode MODE. Initialize column C as a return address column. */ | |
517 | ||
518 | static void | |
519 | init_return_column_size (enum machine_mode mode, rtx mem, unsigned int c) | |
520 | { | |
521 | HOST_WIDE_INT offset = c * GET_MODE_SIZE (mode); | |
522 | HOST_WIDE_INT size = GET_MODE_SIZE (Pmode); | |
523 | emit_move_insn (adjust_address (mem, mode, offset), GEN_INT (size)); | |
524 | } | |
525 | ||
695e919b | 526 | /* Generate code to initialize the register size table. */ |
5ff00a1d | 527 | |
695e919b | 528 | void |
8ec3a57b | 529 | expand_builtin_init_dwarf_reg_sizes (tree address) |
5ff00a1d | 530 | { |
963e1d38 | 531 | unsigned int i; |
695e919b | 532 | enum machine_mode mode = TYPE_MODE (char_type_node); |
8ec3c5c2 | 533 | rtx addr = expand_normal (address); |
8c3f468d | 534 | rtx mem = gen_rtx_MEM (BLKmode, addr); |
5fec5f34 | 535 | bool wrote_return_column = false; |
5ff00a1d | 536 | |
33f90206 | 537 | for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) |
c98ee857 | 538 | { |
539 | int rnum = DWARF2_FRAME_REG_OUT (DWARF_FRAME_REGNUM (i), 1); | |
61a9389f | 540 | |
c98ee857 | 541 | if (rnum < DWARF_FRAME_REGISTERS) |
542 | { | |
543 | HOST_WIDE_INT offset = rnum * GET_MODE_SIZE (mode); | |
544 | enum machine_mode save_mode = reg_raw_mode[i]; | |
545 | HOST_WIDE_INT size; | |
61a9389f | 546 | |
c98ee857 | 547 | if (HARD_REGNO_CALL_PART_CLOBBERED (i, save_mode)) |
548 | save_mode = choose_hard_reg_mode (i, 1, true); | |
549 | if (DWARF_FRAME_REGNUM (i) == DWARF_FRAME_RETURN_COLUMN) | |
550 | { | |
551 | if (save_mode == VOIDmode) | |
552 | continue; | |
553 | wrote_return_column = true; | |
554 | } | |
555 | size = GET_MODE_SIZE (save_mode); | |
556 | if (offset < 0) | |
557 | continue; | |
61a9389f | 558 | |
c98ee857 | 559 | emit_move_insn (adjust_address (mem, mode, offset), |
560 | gen_int_mode (size, mode)); | |
561 | } | |
562 | } | |
c49ad9ef | 563 | |
dd5e1e90 | 564 | if (!wrote_return_column) |
565 | init_return_column_size (mode, mem, DWARF_FRAME_RETURN_COLUMN); | |
566 | ||
c49ad9ef | 567 | #ifdef DWARF_ALT_FRAME_RETURN_COLUMN |
dd5e1e90 | 568 | init_return_column_size (mode, mem, DWARF_ALT_FRAME_RETURN_COLUMN); |
c49ad9ef | 569 | #endif |
114a8a4b | 570 | |
571 | targetm.init_dwarf_reg_sizes_extra (address); | |
5ff00a1d | 572 | } |
573 | ||
8a8bfbe7 | 574 | /* Convert a DWARF call frame info. operation to its string name */ |
30ade641 | 575 | |
7795e5d1 | 576 | static const char * |
8ec3a57b | 577 | dwarf_cfi_name (unsigned int cfi_opc) |
8a8bfbe7 | 578 | { |
579 | switch (cfi_opc) | |
580 | { | |
581 | case DW_CFA_advance_loc: | |
582 | return "DW_CFA_advance_loc"; | |
583 | case DW_CFA_offset: | |
584 | return "DW_CFA_offset"; | |
585 | case DW_CFA_restore: | |
586 | return "DW_CFA_restore"; | |
587 | case DW_CFA_nop: | |
588 | return "DW_CFA_nop"; | |
589 | case DW_CFA_set_loc: | |
590 | return "DW_CFA_set_loc"; | |
591 | case DW_CFA_advance_loc1: | |
592 | return "DW_CFA_advance_loc1"; | |
593 | case DW_CFA_advance_loc2: | |
594 | return "DW_CFA_advance_loc2"; | |
595 | case DW_CFA_advance_loc4: | |
596 | return "DW_CFA_advance_loc4"; | |
597 | case DW_CFA_offset_extended: | |
598 | return "DW_CFA_offset_extended"; | |
599 | case DW_CFA_restore_extended: | |
600 | return "DW_CFA_restore_extended"; | |
601 | case DW_CFA_undefined: | |
602 | return "DW_CFA_undefined"; | |
603 | case DW_CFA_same_value: | |
604 | return "DW_CFA_same_value"; | |
605 | case DW_CFA_register: | |
606 | return "DW_CFA_register"; | |
607 | case DW_CFA_remember_state: | |
608 | return "DW_CFA_remember_state"; | |
609 | case DW_CFA_restore_state: | |
610 | return "DW_CFA_restore_state"; | |
611 | case DW_CFA_def_cfa: | |
612 | return "DW_CFA_def_cfa"; | |
613 | case DW_CFA_def_cfa_register: | |
614 | return "DW_CFA_def_cfa_register"; | |
615 | case DW_CFA_def_cfa_offset: | |
616 | return "DW_CFA_def_cfa_offset"; | |
15a56411 | 617 | |
618 | /* DWARF 3 */ | |
4b72e226 | 619 | case DW_CFA_def_cfa_expression: |
620 | return "DW_CFA_def_cfa_expression"; | |
15a56411 | 621 | case DW_CFA_expression: |
622 | return "DW_CFA_expression"; | |
623 | case DW_CFA_offset_extended_sf: | |
624 | return "DW_CFA_offset_extended_sf"; | |
625 | case DW_CFA_def_cfa_sf: | |
626 | return "DW_CFA_def_cfa_sf"; | |
627 | case DW_CFA_def_cfa_offset_sf: | |
628 | return "DW_CFA_def_cfa_offset_sf"; | |
4ad3f9b3 | 629 | |
8a8bfbe7 | 630 | /* SGI/MIPS specific */ |
631 | case DW_CFA_MIPS_advance_loc8: | |
632 | return "DW_CFA_MIPS_advance_loc8"; | |
4ad3f9b3 | 633 | |
634 | /* GNU extensions */ | |
635 | case DW_CFA_GNU_window_save: | |
636 | return "DW_CFA_GNU_window_save"; | |
d757b8c9 | 637 | case DW_CFA_GNU_args_size: |
638 | return "DW_CFA_GNU_args_size"; | |
db3d4a18 | 639 | case DW_CFA_GNU_negative_offset_extended: |
640 | return "DW_CFA_GNU_negative_offset_extended"; | |
4ad3f9b3 | 641 | |
8a8bfbe7 | 642 | default: |
643 | return "DW_CFA_<unknown>"; | |
644 | } | |
645 | } | |
30ade641 | 646 | |
8a8bfbe7 | 647 | /* Return a pointer to a newly allocated Call Frame Instruction. */ |
ec1e49cc | 648 | |
8a8bfbe7 | 649 | static inline dw_cfi_ref |
8ec3a57b | 650 | new_cfi (void) |
8a8bfbe7 | 651 | { |
2457c754 | 652 | dw_cfi_ref cfi = GGC_NEW (dw_cfi_node); |
ec1e49cc | 653 | |
8a8bfbe7 | 654 | cfi->dw_cfi_next = NULL; |
655 | cfi->dw_cfi_oprnd1.dw_cfi_reg_num = 0; | |
656 | cfi->dw_cfi_oprnd2.dw_cfi_reg_num = 0; | |
30ade641 | 657 | |
8a8bfbe7 | 658 | return cfi; |
659 | } | |
30ade641 | 660 | |
8a8bfbe7 | 661 | /* Add a Call Frame Instruction to list of instructions. */ |
30ade641 | 662 | |
8a8bfbe7 | 663 | static inline void |
8ec3a57b | 664 | add_cfi (dw_cfi_ref *list_head, dw_cfi_ref cfi) |
8a8bfbe7 | 665 | { |
19cb6b50 | 666 | dw_cfi_ref *p; |
27a7a23a | 667 | dw_fde_ref fde = current_fde (); |
668 | ||
669 | /* When DRAP is used, CFA is defined with an expression. Redefine | |
670 | CFA may lead to a different CFA value. */ | |
671 | if (fde && fde->drap_reg != INVALID_REGNUM) | |
672 | switch (cfi->dw_cfi_opc) | |
673 | { | |
674 | case DW_CFA_def_cfa_register: | |
675 | case DW_CFA_def_cfa_offset: | |
676 | case DW_CFA_def_cfa_offset_sf: | |
677 | case DW_CFA_def_cfa: | |
678 | case DW_CFA_def_cfa_sf: | |
679 | gcc_unreachable (); | |
680 | ||
681 | default: | |
682 | break; | |
683 | } | |
30ade641 | 684 | |
8a8bfbe7 | 685 | /* Find the end of the chain. */ |
686 | for (p = list_head; (*p) != NULL; p = &(*p)->dw_cfi_next) | |
687 | ; | |
688 | ||
689 | *p = cfi; | |
30ade641 | 690 | } |
691 | ||
8a8bfbe7 | 692 | /* Generate a new label for the CFI info to refer to. */ |
ec1e49cc | 693 | |
4ad3f9b3 | 694 | char * |
8ec3a57b | 695 | dwarf2out_cfi_label (void) |
30ade641 | 696 | { |
8a8bfbe7 | 697 | static char label[20]; |
f80d1bcd | 698 | |
3dcd5df1 | 699 | if (dwarf2out_do_cfi_asm ()) |
fb39ff6e | 700 | { |
701 | /* In this case, we will be emitting the asm directive instead of | |
702 | the label, so just return a placeholder to keep the rest of the | |
703 | interfaces happy. */ | |
704 | strcpy (label, "<do not output>"); | |
705 | } | |
706 | else | |
707 | { | |
708 | ASM_GENERATE_INTERNAL_LABEL (label, "LCFI", dwarf2out_cfi_label_num++); | |
709 | ASM_OUTPUT_LABEL (asm_out_file, label); | |
710 | } | |
711 | ||
8a8bfbe7 | 712 | return label; |
30ade641 | 713 | } |
714 | ||
8a8bfbe7 | 715 | /* Add CFI to the current fde at the PC value indicated by LABEL if specified, |
716 | or to the CIE if LABEL is NULL. */ | |
ec1e49cc | 717 | |
8a8bfbe7 | 718 | static void |
8ec3a57b | 719 | add_fde_cfi (const char *label, dw_cfi_ref cfi) |
30ade641 | 720 | { |
fb39ff6e | 721 | dw_cfi_ref *list_head = &cie_cfi_head; |
722 | ||
3dcd5df1 | 723 | if (dwarf2out_do_cfi_asm ()) |
fb39ff6e | 724 | { |
725 | if (label) | |
726 | { | |
727 | output_cfi_directive (cfi); | |
728 | ||
729 | /* We still have to add the cfi to the list so that | |
730 | lookup_cfa works later on. */ | |
731 | list_head = ¤t_fde ()->dw_fde_cfi; | |
732 | } | |
733 | /* ??? If this is a CFI for the CIE, we don't emit. This | |
734 | assumes that the standard CIE contents that the assembler | |
735 | uses matches the standard CIE contents that the compiler | |
736 | uses. This is probably a bad assumption. I'm not quite | |
737 | sure how to address this for now. */ | |
738 | } | |
739 | else if (label) | |
8a8bfbe7 | 740 | { |
c0fd44c1 | 741 | dw_fde_ref fde = current_fde (); |
742 | ||
743 | gcc_assert (fde != NULL); | |
30ade641 | 744 | |
8a8bfbe7 | 745 | if (*label == 0) |
746 | label = dwarf2out_cfi_label (); | |
ec1e49cc | 747 | |
8a8bfbe7 | 748 | if (fde->dw_fde_current_label == NULL |
749 | || strcmp (label, fde->dw_fde_current_label) != 0) | |
750 | { | |
19cb6b50 | 751 | dw_cfi_ref xcfi; |
30ade641 | 752 | |
d8eb7025 | 753 | label = xstrdup (label); |
ec1e49cc | 754 | |
8a8bfbe7 | 755 | /* Set the location counter to the new label. */ |
756 | xcfi = new_cfi (); | |
d8eb7025 | 757 | /* If we have a current label, advance from there, otherwise |
758 | set the location directly using set_loc. */ | |
759 | xcfi->dw_cfi_opc = fde->dw_fde_current_label | |
760 | ? DW_CFA_advance_loc4 | |
761 | : DW_CFA_set_loc; | |
8a8bfbe7 | 762 | xcfi->dw_cfi_oprnd1.dw_cfi_addr = label; |
763 | add_cfi (&fde->dw_fde_cfi, xcfi); | |
d8eb7025 | 764 | |
765 | fde->dw_fde_current_label = label; | |
8a8bfbe7 | 766 | } |
ec1e49cc | 767 | |
fb39ff6e | 768 | list_head = &fde->dw_fde_cfi; |
8a8bfbe7 | 769 | } |
770 | ||
fb39ff6e | 771 | add_cfi (list_head, cfi); |
30ade641 | 772 | } |
773 | ||
8a8bfbe7 | 774 | /* Subroutine of lookup_cfa. */ |
ec1e49cc | 775 | |
12d886b8 | 776 | static void |
8ec3a57b | 777 | lookup_cfa_1 (dw_cfi_ref cfi, dw_cfa_location *loc) |
30ade641 | 778 | { |
8a8bfbe7 | 779 | switch (cfi->dw_cfi_opc) |
780 | { | |
781 | case DW_CFA_def_cfa_offset: | |
da72c083 | 782 | case DW_CFA_def_cfa_offset_sf: |
be30e9d9 | 783 | loc->offset = cfi->dw_cfi_oprnd1.dw_cfi_offset; |
da72c083 | 784 | break; |
8a8bfbe7 | 785 | case DW_CFA_def_cfa_register: |
4b72e226 | 786 | loc->reg = cfi->dw_cfi_oprnd1.dw_cfi_reg_num; |
8a8bfbe7 | 787 | break; |
788 | case DW_CFA_def_cfa: | |
da72c083 | 789 | case DW_CFA_def_cfa_sf: |
790 | loc->reg = cfi->dw_cfi_oprnd1.dw_cfi_reg_num; | |
be30e9d9 | 791 | loc->offset = cfi->dw_cfi_oprnd2.dw_cfi_offset; |
da72c083 | 792 | break; |
4b72e226 | 793 | case DW_CFA_def_cfa_expression: |
794 | get_cfa_from_loc_descr (loc, cfi->dw_cfi_oprnd1.dw_cfi_loc); | |
8a8bfbe7 | 795 | break; |
0dbd1c74 | 796 | default: |
797 | break; | |
8a8bfbe7 | 798 | } |
30ade641 | 799 | } |
800 | ||
8a8bfbe7 | 801 | /* Find the previous value for the CFA. */ |
ec1e49cc | 802 | |
8a8bfbe7 | 803 | static void |
8ec3a57b | 804 | lookup_cfa (dw_cfa_location *loc) |
30ade641 | 805 | { |
19cb6b50 | 806 | dw_cfi_ref cfi; |
c0fd44c1 | 807 | dw_fde_ref fde; |
8a8bfbe7 | 808 | |
12d886b8 | 809 | loc->reg = INVALID_REGNUM; |
4b72e226 | 810 | loc->offset = 0; |
811 | loc->indirect = 0; | |
812 | loc->base_offset = 0; | |
8a8bfbe7 | 813 | |
814 | for (cfi = cie_cfi_head; cfi; cfi = cfi->dw_cfi_next) | |
4b72e226 | 815 | lookup_cfa_1 (cfi, loc); |
8a8bfbe7 | 816 | |
c0fd44c1 | 817 | fde = current_fde (); |
818 | if (fde) | |
819 | for (cfi = fde->dw_fde_cfi; cfi; cfi = cfi->dw_cfi_next) | |
820 | lookup_cfa_1 (cfi, loc); | |
30ade641 | 821 | } |
822 | ||
8a8bfbe7 | 823 | /* The current rule for calculating the DWARF2 canonical frame address. */ |
b0d72d68 | 824 | static dw_cfa_location cfa; |
ec1e49cc | 825 | |
8a8bfbe7 | 826 | /* The register used for saving registers to the stack, and its offset |
827 | from the CFA. */ | |
b0d72d68 | 828 | static dw_cfa_location cfa_store; |
8a8bfbe7 | 829 | |
d757b8c9 | 830 | /* The running total of the size of arguments pushed onto the stack. */ |
3d867824 | 831 | static HOST_WIDE_INT args_size; |
d757b8c9 | 832 | |
08532d4f | 833 | /* The last args_size we actually output. */ |
3d867824 | 834 | static HOST_WIDE_INT old_args_size; |
08532d4f | 835 | |
8a8bfbe7 | 836 | /* Entry point to update the canonical frame address (CFA). |
837 | LABEL is passed to add_fde_cfi. The value of CFA is now to be | |
838 | calculated from REG+OFFSET. */ | |
839 | ||
840 | void | |
3d867824 | 841 | dwarf2out_def_cfa (const char *label, unsigned int reg, HOST_WIDE_INT offset) |
4b72e226 | 842 | { |
843 | dw_cfa_location loc; | |
844 | loc.indirect = 0; | |
845 | loc.base_offset = 0; | |
846 | loc.reg = reg; | |
847 | loc.offset = offset; | |
848 | def_cfa_1 (label, &loc); | |
849 | } | |
850 | ||
12d886b8 | 851 | /* Determine if two dw_cfa_location structures define the same data. */ |
852 | ||
853 | static bool | |
854 | cfa_equal_p (const dw_cfa_location *loc1, const dw_cfa_location *loc2) | |
855 | { | |
856 | return (loc1->reg == loc2->reg | |
857 | && loc1->offset == loc2->offset | |
858 | && loc1->indirect == loc2->indirect | |
859 | && (loc1->indirect == 0 | |
860 | || loc1->base_offset == loc2->base_offset)); | |
861 | } | |
862 | ||
950ae8fe | 863 | /* This routine does the actual work. The CFA is now calculated from |
4b72e226 | 864 | the dw_cfa_location structure. */ |
8c3f468d | 865 | |
4b72e226 | 866 | static void |
8ec3a57b | 867 | def_cfa_1 (const char *label, dw_cfa_location *loc_p) |
30ade641 | 868 | { |
19cb6b50 | 869 | dw_cfi_ref cfi; |
4b72e226 | 870 | dw_cfa_location old_cfa, loc; |
8a8bfbe7 | 871 | |
4b72e226 | 872 | cfa = *loc_p; |
873 | loc = *loc_p; | |
8ab7f849 | 874 | |
4b72e226 | 875 | if (cfa_store.reg == loc.reg && loc.indirect == 0) |
876 | cfa_store.offset = loc.offset; | |
8a8bfbe7 | 877 | |
4b72e226 | 878 | loc.reg = DWARF_FRAME_REGNUM (loc.reg); |
879 | lookup_cfa (&old_cfa); | |
880 | ||
8c3f468d | 881 | /* If nothing changed, no need to issue any call frame instructions. */ |
12d886b8 | 882 | if (cfa_equal_p (&loc, &old_cfa)) |
8c3f468d | 883 | return; |
8a8bfbe7 | 884 | |
885 | cfi = new_cfi (); | |
886 | ||
49a9983c | 887 | if (loc.reg == old_cfa.reg && !loc.indirect) |
30ade641 | 888 | { |
da72c083 | 889 | /* Construct a "DW_CFA_def_cfa_offset <offset>" instruction, indicating |
be30e9d9 | 890 | the CFA register did not change but the offset did. The data |
891 | factoring for DW_CFA_def_cfa_offset_sf happens in output_cfi, or | |
892 | in the assembler via the .cfi_def_cfa_offset directive. */ | |
da72c083 | 893 | if (loc.offset < 0) |
be30e9d9 | 894 | cfi->dw_cfi_opc = DW_CFA_def_cfa_offset_sf; |
da72c083 | 895 | else |
be30e9d9 | 896 | cfi->dw_cfi_opc = DW_CFA_def_cfa_offset; |
897 | cfi->dw_cfi_oprnd1.dw_cfi_offset = loc.offset; | |
8a8bfbe7 | 898 | } |
30ade641 | 899 | |
8a8bfbe7 | 900 | #ifndef MIPS_DEBUGGING_INFO /* SGI dbx thinks this means no offset. */ |
12d886b8 | 901 | else if (loc.offset == old_cfa.offset |
902 | && old_cfa.reg != INVALID_REGNUM | |
49a9983c | 903 | && !loc.indirect) |
8a8bfbe7 | 904 | { |
950ae8fe | 905 | /* Construct a "DW_CFA_def_cfa_register <register>" instruction, |
906 | indicating the CFA register has changed to <register> but the | |
907 | offset has not changed. */ | |
8a8bfbe7 | 908 | cfi->dw_cfi_opc = DW_CFA_def_cfa_register; |
4b72e226 | 909 | cfi->dw_cfi_oprnd1.dw_cfi_reg_num = loc.reg; |
8a8bfbe7 | 910 | } |
911 | #endif | |
30ade641 | 912 | |
4b72e226 | 913 | else if (loc.indirect == 0) |
8a8bfbe7 | 914 | { |
950ae8fe | 915 | /* Construct a "DW_CFA_def_cfa <register> <offset>" instruction, |
916 | indicating the CFA register has changed to <register> with | |
be30e9d9 | 917 | the specified offset. The data factoring for DW_CFA_def_cfa_sf |
918 | happens in output_cfi, or in the assembler via the .cfi_def_cfa | |
919 | directive. */ | |
da72c083 | 920 | if (loc.offset < 0) |
be30e9d9 | 921 | cfi->dw_cfi_opc = DW_CFA_def_cfa_sf; |
da72c083 | 922 | else |
be30e9d9 | 923 | cfi->dw_cfi_opc = DW_CFA_def_cfa; |
924 | cfi->dw_cfi_oprnd1.dw_cfi_reg_num = loc.reg; | |
925 | cfi->dw_cfi_oprnd2.dw_cfi_offset = loc.offset; | |
4b72e226 | 926 | } |
927 | else | |
928 | { | |
950ae8fe | 929 | /* Construct a DW_CFA_def_cfa_expression instruction to |
930 | calculate the CFA using a full location expression since no | |
931 | register-offset pair is available. */ | |
f80d1bcd | 932 | struct dw_loc_descr_struct *loc_list; |
8c3f468d | 933 | |
4b72e226 | 934 | cfi->dw_cfi_opc = DW_CFA_def_cfa_expression; |
89fa767a | 935 | loc_list = build_cfa_loc (&loc, 0); |
4b72e226 | 936 | cfi->dw_cfi_oprnd1.dw_cfi_loc = loc_list; |
30ade641 | 937 | } |
8a8bfbe7 | 938 | |
939 | add_fde_cfi (label, cfi); | |
30ade641 | 940 | } |
941 | ||
8a8bfbe7 | 942 | /* Add the CFI for saving a register. REG is the CFA column number. |
943 | LABEL is passed to add_fde_cfi. | |
944 | If SREG is -1, the register is saved at OFFSET from the CFA; | |
945 | otherwise it is saved in SREG. */ | |
ec1e49cc | 946 | |
8a8bfbe7 | 947 | static void |
3d867824 | 948 | reg_save (const char *label, unsigned int reg, unsigned int sreg, HOST_WIDE_INT offset) |
30ade641 | 949 | { |
19cb6b50 | 950 | dw_cfi_ref cfi = new_cfi (); |
27a7a23a | 951 | dw_fde_ref fde = current_fde (); |
8a8bfbe7 | 952 | |
953 | cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg; | |
954 | ||
27a7a23a | 955 | /* When stack is aligned, store REG using DW_CFA_expression with |
956 | FP. */ | |
957 | if (fde | |
958 | && fde->stack_realign | |
959 | && sreg == INVALID_REGNUM) | |
960 | { | |
961 | cfi->dw_cfi_opc = DW_CFA_expression; | |
962 | cfi->dw_cfi_oprnd2.dw_cfi_reg_num = reg; | |
963 | cfi->dw_cfi_oprnd1.dw_cfi_loc | |
964 | = build_cfa_aligned_loc (offset, fde->stack_realignment); | |
965 | } | |
966 | else if (sreg == INVALID_REGNUM) | |
30ade641 | 967 | { |
be30e9d9 | 968 | if (offset < 0) |
969 | cfi->dw_cfi_opc = DW_CFA_offset_extended_sf; | |
970 | else if (reg & ~0x3f) | |
8a8bfbe7 | 971 | cfi->dw_cfi_opc = DW_CFA_offset_extended; |
972 | else | |
973 | cfi->dw_cfi_opc = DW_CFA_offset; | |
8a8bfbe7 | 974 | cfi->dw_cfi_oprnd2.dw_cfi_offset = offset; |
975 | } | |
220d204b | 976 | else if (sreg == reg) |
60ea93bb | 977 | cfi->dw_cfi_opc = DW_CFA_same_value; |
8a8bfbe7 | 978 | else |
979 | { | |
980 | cfi->dw_cfi_opc = DW_CFA_register; | |
981 | cfi->dw_cfi_oprnd2.dw_cfi_reg_num = sreg; | |
982 | } | |
983 | ||
984 | add_fde_cfi (label, cfi); | |
985 | } | |
986 | ||
4ad3f9b3 | 987 | /* Add the CFI for saving a register window. LABEL is passed to reg_save. |
988 | This CFI tells the unwinder that it needs to restore the window registers | |
989 | from the previous frame's window save area. | |
f80d1bcd | 990 | |
4ad3f9b3 | 991 | ??? Perhaps we should note in the CIE where windows are saved (instead of |
992 | assuming 0(cfa)) and what registers are in the window. */ | |
993 | ||
994 | void | |
8ec3a57b | 995 | dwarf2out_window_save (const char *label) |
4ad3f9b3 | 996 | { |
19cb6b50 | 997 | dw_cfi_ref cfi = new_cfi (); |
8c3f468d | 998 | |
4ad3f9b3 | 999 | cfi->dw_cfi_opc = DW_CFA_GNU_window_save; |
1000 | add_fde_cfi (label, cfi); | |
1001 | } | |
1002 | ||
d757b8c9 | 1003 | /* Add a CFI to update the running total of the size of arguments |
1004 | pushed onto the stack. */ | |
1005 | ||
1006 | void | |
3d867824 | 1007 | dwarf2out_args_size (const char *label, HOST_WIDE_INT size) |
d757b8c9 | 1008 | { |
19cb6b50 | 1009 | dw_cfi_ref cfi; |
08532d4f | 1010 | |
1011 | if (size == old_args_size) | |
1012 | return; | |
8c3f468d | 1013 | |
08532d4f | 1014 | old_args_size = size; |
1015 | ||
1016 | cfi = new_cfi (); | |
d757b8c9 | 1017 | cfi->dw_cfi_opc = DW_CFA_GNU_args_size; |
1018 | cfi->dw_cfi_oprnd1.dw_cfi_offset = size; | |
1019 | add_fde_cfi (label, cfi); | |
1020 | } | |
1021 | ||
4ad3f9b3 | 1022 | /* Entry point for saving a register to the stack. REG is the GCC register |
1023 | number. LABEL and OFFSET are passed to reg_save. */ | |
8a8bfbe7 | 1024 | |
1025 | void | |
3d867824 | 1026 | dwarf2out_reg_save (const char *label, unsigned int reg, HOST_WIDE_INT offset) |
8a8bfbe7 | 1027 | { |
f481766a | 1028 | reg_save (label, DWARF_FRAME_REGNUM (reg), INVALID_REGNUM, offset); |
8a8bfbe7 | 1029 | } |
1030 | ||
4ad3f9b3 | 1031 | /* Entry point for saving the return address in the stack. |
1032 | LABEL and OFFSET are passed to reg_save. */ | |
1033 | ||
1034 | void | |
3d867824 | 1035 | dwarf2out_return_save (const char *label, HOST_WIDE_INT offset) |
4ad3f9b3 | 1036 | { |
f481766a | 1037 | reg_save (label, DWARF_FRAME_RETURN_COLUMN, INVALID_REGNUM, offset); |
4ad3f9b3 | 1038 | } |
1039 | ||
1040 | /* Entry point for saving the return address in a register. | |
1041 | LABEL and SREG are passed to reg_save. */ | |
1042 | ||
1043 | void | |
8ec3a57b | 1044 | dwarf2out_return_reg (const char *label, unsigned int sreg) |
4ad3f9b3 | 1045 | { |
f481766a | 1046 | reg_save (label, DWARF_FRAME_RETURN_COLUMN, DWARF_FRAME_REGNUM (sreg), 0); |
4ad3f9b3 | 1047 | } |
1048 | ||
bf780b7e | 1049 | #ifdef DWARF2_UNWIND_INFO |
8a8bfbe7 | 1050 | /* Record the initial position of the return address. RTL is |
1051 | INCOMING_RETURN_ADDR_RTX. */ | |
1052 | ||
1053 | static void | |
8ec3a57b | 1054 | initial_return_save (rtx rtl) |
8a8bfbe7 | 1055 | { |
f481766a | 1056 | unsigned int reg = INVALID_REGNUM; |
8c3f468d | 1057 | HOST_WIDE_INT offset = 0; |
8a8bfbe7 | 1058 | |
1059 | switch (GET_CODE (rtl)) | |
1060 | { | |
1061 | case REG: | |
1062 | /* RA is in a register. */ | |
220d204b | 1063 | reg = DWARF_FRAME_REGNUM (REGNO (rtl)); |
8a8bfbe7 | 1064 | break; |
8c3f468d | 1065 | |
8a8bfbe7 | 1066 | case MEM: |
1067 | /* RA is on the stack. */ | |
1068 | rtl = XEXP (rtl, 0); | |
1069 | switch (GET_CODE (rtl)) | |
1070 | { | |
1071 | case REG: | |
7bd4f6b6 | 1072 | gcc_assert (REGNO (rtl) == STACK_POINTER_REGNUM); |
8a8bfbe7 | 1073 | offset = 0; |
1074 | break; | |
8c3f468d | 1075 | |
8a8bfbe7 | 1076 | case PLUS: |
7bd4f6b6 | 1077 | gcc_assert (REGNO (XEXP (rtl, 0)) == STACK_POINTER_REGNUM); |
8a8bfbe7 | 1078 | offset = INTVAL (XEXP (rtl, 1)); |
1079 | break; | |
8c3f468d | 1080 | |
8a8bfbe7 | 1081 | case MINUS: |
7bd4f6b6 | 1082 | gcc_assert (REGNO (XEXP (rtl, 0)) == STACK_POINTER_REGNUM); |
8a8bfbe7 | 1083 | offset = -INTVAL (XEXP (rtl, 1)); |
1084 | break; | |
8c3f468d | 1085 | |
8a8bfbe7 | 1086 | default: |
7bd4f6b6 | 1087 | gcc_unreachable (); |
8a8bfbe7 | 1088 | } |
8c3f468d | 1089 | |
8a8bfbe7 | 1090 | break; |
8c3f468d | 1091 | |
4ad3f9b3 | 1092 | case PLUS: |
1093 | /* The return address is at some offset from any value we can | |
1094 | actually load. For instance, on the SPARC it is in %i7+8. Just | |
1095 | ignore the offset for now; it doesn't matter for unwinding frames. */ | |
7bd4f6b6 | 1096 | gcc_assert (GET_CODE (XEXP (rtl, 1)) == CONST_INT); |
4ad3f9b3 | 1097 | initial_return_save (XEXP (rtl, 0)); |
1098 | return; | |
8c3f468d | 1099 | |
30ade641 | 1100 | default: |
7bd4f6b6 | 1101 | gcc_unreachable (); |
30ade641 | 1102 | } |
8a8bfbe7 | 1103 | |
60ea93bb | 1104 | if (reg != DWARF_FRAME_RETURN_COLUMN) |
1105 | reg_save (NULL, DWARF_FRAME_RETURN_COLUMN, reg, offset - cfa.offset); | |
30ade641 | 1106 | } |
bf780b7e | 1107 | #endif |
30ade641 | 1108 | |
6ee89c56 | 1109 | /* Given a SET, calculate the amount of stack adjustment it |
6312a35e | 1110 | contains. */ |
6ee89c56 | 1111 | |
3d867824 | 1112 | static HOST_WIDE_INT |
2f87ccae | 1113 | stack_adjust_offset (const_rtx pattern, HOST_WIDE_INT cur_args_size, |
1114 | HOST_WIDE_INT cur_offset) | |
6ee89c56 | 1115 | { |
5493cb9a | 1116 | const_rtx src = SET_SRC (pattern); |
1117 | const_rtx dest = SET_DEST (pattern); | |
8c3f468d | 1118 | HOST_WIDE_INT offset = 0; |
6ee89c56 | 1119 | enum rtx_code code; |
1120 | ||
1121 | if (dest == stack_pointer_rtx) | |
1122 | { | |
6ee89c56 | 1123 | code = GET_CODE (src); |
2f87ccae | 1124 | |
1125 | /* Assume (set (reg sp) (reg whatever)) sets args_size | |
1126 | level to 0. */ | |
1127 | if (code == REG && src != stack_pointer_rtx) | |
1128 | { | |
1129 | offset = -cur_args_size; | |
1130 | #ifndef STACK_GROWS_DOWNWARD | |
1131 | offset = -offset; | |
1132 | #endif | |
1133 | return offset - cur_offset; | |
1134 | } | |
1135 | ||
6ee89c56 | 1136 | if (! (code == PLUS || code == MINUS) |
1137 | || XEXP (src, 0) != stack_pointer_rtx | |
1138 | || GET_CODE (XEXP (src, 1)) != CONST_INT) | |
1139 | return 0; | |
1140 | ||
2f87ccae | 1141 | /* (set (reg sp) (plus (reg sp) (const_int))) */ |
6ee89c56 | 1142 | offset = INTVAL (XEXP (src, 1)); |
052c7a5c | 1143 | if (code == PLUS) |
1144 | offset = -offset; | |
2f87ccae | 1145 | return offset; |
6ee89c56 | 1146 | } |
2f87ccae | 1147 | |
1148 | if (MEM_P (src) && !MEM_P (dest)) | |
1149 | dest = src; | |
1150 | if (MEM_P (dest)) | |
6ee89c56 | 1151 | { |
1152 | /* (set (mem (pre_dec (reg sp))) (foo)) */ | |
1153 | src = XEXP (dest, 0); | |
1154 | code = GET_CODE (src); | |
1155 | ||
bc70bd5e | 1156 | switch (code) |
1157 | { | |
052c7a5c | 1158 | case PRE_MODIFY: |
1159 | case POST_MODIFY: | |
1160 | if (XEXP (src, 0) == stack_pointer_rtx) | |
1161 | { | |
1162 | rtx val = XEXP (XEXP (src, 1), 1); | |
1163 | /* We handle only adjustments by constant amount. */ | |
7bd4f6b6 | 1164 | gcc_assert (GET_CODE (XEXP (src, 1)) == PLUS |
1165 | && GET_CODE (val) == CONST_INT); | |
052c7a5c | 1166 | offset = -INTVAL (val); |
1167 | break; | |
1168 | } | |
1169 | return 0; | |
1170 | ||
1171 | case PRE_DEC: | |
1172 | case POST_DEC: | |
1173 | if (XEXP (src, 0) == stack_pointer_rtx) | |
1174 | { | |
1175 | offset = GET_MODE_SIZE (GET_MODE (dest)); | |
1176 | break; | |
1177 | } | |
1178 | return 0; | |
1179 | ||
1180 | case PRE_INC: | |
1181 | case POST_INC: | |
1182 | if (XEXP (src, 0) == stack_pointer_rtx) | |
1183 | { | |
1184 | offset = -GET_MODE_SIZE (GET_MODE (dest)); | |
1185 | break; | |
1186 | } | |
1187 | return 0; | |
8c3f468d | 1188 | |
052c7a5c | 1189 | default: |
1190 | return 0; | |
93fbe1f3 | 1191 | } |
6ee89c56 | 1192 | } |
1193 | else | |
1194 | return 0; | |
1195 | ||
6ee89c56 | 1196 | return offset; |
1197 | } | |
1198 | ||
9396ae97 | 1199 | /* Precomputed args_size for CODE_LABELs and BARRIERs preceeding them, |
1200 | indexed by INSN_UID. */ | |
1201 | ||
1202 | static HOST_WIDE_INT *barrier_args_size; | |
1203 | ||
1204 | /* Helper function for compute_barrier_args_size. Handle one insn. */ | |
1205 | ||
1206 | static HOST_WIDE_INT | |
1207 | compute_barrier_args_size_1 (rtx insn, HOST_WIDE_INT cur_args_size, | |
1208 | VEC (rtx, heap) **next) | |
1209 | { | |
1210 | HOST_WIDE_INT offset = 0; | |
1211 | int i; | |
1212 | ||
1213 | if (! RTX_FRAME_RELATED_P (insn)) | |
1214 | { | |
1215 | if (prologue_epilogue_contains (insn) | |
1216 | || sibcall_epilogue_contains (insn)) | |
1217 | /* Nothing */; | |
1218 | else if (GET_CODE (PATTERN (insn)) == SET) | |
2f87ccae | 1219 | offset = stack_adjust_offset (PATTERN (insn), cur_args_size, 0); |
9396ae97 | 1220 | else if (GET_CODE (PATTERN (insn)) == PARALLEL |
1221 | || GET_CODE (PATTERN (insn)) == SEQUENCE) | |
1222 | { | |
1223 | /* There may be stack adjustments inside compound insns. Search | |
1224 | for them. */ | |
1225 | for (i = XVECLEN (PATTERN (insn), 0) - 1; i >= 0; i--) | |
1226 | if (GET_CODE (XVECEXP (PATTERN (insn), 0, i)) == SET) | |
2f87ccae | 1227 | offset += stack_adjust_offset (XVECEXP (PATTERN (insn), 0, i), |
1228 | cur_args_size, offset); | |
9396ae97 | 1229 | } |
1230 | } | |
1231 | else | |
1232 | { | |
1233 | rtx expr = find_reg_note (insn, REG_FRAME_RELATED_EXPR, NULL_RTX); | |
1234 | ||
1235 | if (expr) | |
1236 | { | |
1237 | expr = XEXP (expr, 0); | |
1238 | if (GET_CODE (expr) == PARALLEL | |
1239 | || GET_CODE (expr) == SEQUENCE) | |
1240 | for (i = 1; i < XVECLEN (expr, 0); i++) | |
1241 | { | |
1242 | rtx elem = XVECEXP (expr, 0, i); | |
1243 | ||
1244 | if (GET_CODE (elem) == SET && !RTX_FRAME_RELATED_P (elem)) | |
2f87ccae | 1245 | offset += stack_adjust_offset (elem, cur_args_size, offset); |
9396ae97 | 1246 | } |
1247 | } | |
1248 | } | |
1249 | ||
1250 | #ifndef STACK_GROWS_DOWNWARD | |
1251 | offset = -offset; | |
1252 | #endif | |
1253 | ||
1254 | cur_args_size += offset; | |
1255 | if (cur_args_size < 0) | |
1256 | cur_args_size = 0; | |
1257 | ||
1258 | if (JUMP_P (insn)) | |
1259 | { | |
1260 | rtx dest = JUMP_LABEL (insn); | |
1261 | ||
1262 | if (dest) | |
1263 | { | |
1264 | if (barrier_args_size [INSN_UID (dest)] < 0) | |
1265 | { | |
1266 | barrier_args_size [INSN_UID (dest)] = cur_args_size; | |
1267 | VEC_safe_push (rtx, heap, *next, dest); | |
1268 | } | |
9396ae97 | 1269 | } |
1270 | } | |
1271 | ||
1272 | return cur_args_size; | |
1273 | } | |
1274 | ||
1275 | /* Walk the whole function and compute args_size on BARRIERs. */ | |
1276 | ||
1277 | static void | |
1278 | compute_barrier_args_size (void) | |
1279 | { | |
1280 | int max_uid = get_max_uid (), i; | |
1281 | rtx insn; | |
1282 | VEC (rtx, heap) *worklist, *next, *tmp; | |
1283 | ||
1284 | barrier_args_size = XNEWVEC (HOST_WIDE_INT, max_uid); | |
1285 | for (i = 0; i < max_uid; i++) | |
1286 | barrier_args_size[i] = -1; | |
1287 | ||
1288 | worklist = VEC_alloc (rtx, heap, 20); | |
1289 | next = VEC_alloc (rtx, heap, 20); | |
1290 | insn = get_insns (); | |
1291 | barrier_args_size[INSN_UID (insn)] = 0; | |
1292 | VEC_quick_push (rtx, worklist, insn); | |
1293 | for (;;) | |
1294 | { | |
1295 | while (!VEC_empty (rtx, worklist)) | |
1296 | { | |
8aa5820b | 1297 | rtx prev, body, first_insn; |
9396ae97 | 1298 | HOST_WIDE_INT cur_args_size; |
1299 | ||
8aa5820b | 1300 | first_insn = insn = VEC_pop (rtx, worklist); |
9396ae97 | 1301 | cur_args_size = barrier_args_size[INSN_UID (insn)]; |
1302 | prev = prev_nonnote_insn (insn); | |
1303 | if (prev && BARRIER_P (prev)) | |
1304 | barrier_args_size[INSN_UID (prev)] = cur_args_size; | |
1305 | ||
1306 | for (; insn; insn = NEXT_INSN (insn)) | |
1307 | { | |
1308 | if (INSN_DELETED_P (insn) || NOTE_P (insn)) | |
1309 | continue; | |
1310 | if (BARRIER_P (insn)) | |
1311 | break; | |
1312 | ||
1313 | if (LABEL_P (insn)) | |
1314 | { | |
8aa5820b | 1315 | if (insn == first_insn) |
1316 | continue; | |
1317 | else if (barrier_args_size[INSN_UID (insn)] < 0) | |
1318 | { | |
1319 | barrier_args_size[INSN_UID (insn)] = cur_args_size; | |
1320 | continue; | |
1321 | } | |
1322 | else | |
1323 | { | |
1324 | /* The insns starting with this label have been | |
1325 | already scanned or are in the worklist. */ | |
8aa5820b | 1326 | break; |
1327 | } | |
9396ae97 | 1328 | } |
1329 | ||
1330 | body = PATTERN (insn); | |
1331 | if (GET_CODE (body) == SEQUENCE) | |
1332 | { | |
2f87ccae | 1333 | HOST_WIDE_INT dest_args_size = cur_args_size; |
9396ae97 | 1334 | for (i = 1; i < XVECLEN (body, 0); i++) |
2f87ccae | 1335 | if (INSN_ANNULLED_BRANCH_P (XVECEXP (body, 0, 0)) |
1336 | && INSN_FROM_TARGET_P (XVECEXP (body, 0, i))) | |
1337 | dest_args_size | |
1338 | = compute_barrier_args_size_1 (XVECEXP (body, 0, i), | |
1339 | dest_args_size, &next); | |
1340 | else | |
1341 | cur_args_size | |
1342 | = compute_barrier_args_size_1 (XVECEXP (body, 0, i), | |
1343 | cur_args_size, &next); | |
1344 | ||
1345 | if (INSN_ANNULLED_BRANCH_P (XVECEXP (body, 0, 0))) | |
1346 | compute_barrier_args_size_1 (XVECEXP (body, 0, 0), | |
1347 | dest_args_size, &next); | |
1348 | else | |
9396ae97 | 1349 | cur_args_size |
2f87ccae | 1350 | = compute_barrier_args_size_1 (XVECEXP (body, 0, 0), |
9396ae97 | 1351 | cur_args_size, &next); |
9396ae97 | 1352 | } |
1353 | else | |
1354 | cur_args_size | |
1355 | = compute_barrier_args_size_1 (insn, cur_args_size, &next); | |
1356 | } | |
1357 | } | |
1358 | ||
1359 | if (VEC_empty (rtx, next)) | |
1360 | break; | |
1361 | ||
1362 | /* Swap WORKLIST with NEXT and truncate NEXT for next iteration. */ | |
1363 | tmp = next; | |
1364 | next = worklist; | |
1365 | worklist = tmp; | |
1366 | VEC_truncate (rtx, next, 0); | |
1367 | } | |
1368 | ||
1369 | VEC_free (rtx, heap, worklist); | |
1370 | VEC_free (rtx, heap, next); | |
1371 | } | |
1372 | ||
1373 | ||
d757b8c9 | 1374 | /* Check INSN to see if it looks like a push or a stack adjustment, and |
1375 | make a note of it if it does. EH uses this information to find out how | |
1376 | much extra space it needs to pop off the stack. */ | |
1377 | ||
1378 | static void | |
46b2b3c8 | 1379 | dwarf2out_stack_adjust (rtx insn, bool after_p) |
d757b8c9 | 1380 | { |
8c3f468d | 1381 | HOST_WIDE_INT offset; |
1e034a40 | 1382 | const char *label; |
8c3f468d | 1383 | int i; |
d757b8c9 | 1384 | |
31b1fbc5 | 1385 | /* Don't handle epilogues at all. Certainly it would be wrong to do so |
1386 | with this function. Proper support would require all frame-related | |
1387 | insns to be marked, and to be able to handle saving state around | |
1388 | epilogues textually in the middle of the function. */ | |
1389 | if (prologue_epilogue_contains (insn) || sibcall_epilogue_contains (insn)) | |
1390 | return; | |
1391 | ||
2f87ccae | 1392 | /* If INSN is an instruction from target of an annulled branch, the |
1393 | effects are for the target only and so current argument size | |
1394 | shouldn't change at all. */ | |
1395 | if (final_sequence | |
1396 | && INSN_ANNULLED_BRANCH_P (XVECEXP (final_sequence, 0, 0)) | |
1397 | && INSN_FROM_TARGET_P (insn)) | |
1398 | return; | |
1399 | ||
46b2b3c8 | 1400 | /* If only calls can throw, and we have a frame pointer, |
1401 | save up adjustments until we see the CALL_INSN. */ | |
1402 | if (!flag_asynchronous_unwind_tables && cfa.reg != STACK_POINTER_REGNUM) | |
1403 | { | |
1404 | if (CALL_P (insn) && !after_p) | |
1405 | { | |
1406 | /* Extract the size of the args from the CALL rtx itself. */ | |
1407 | insn = PATTERN (insn); | |
1408 | if (GET_CODE (insn) == PARALLEL) | |
1409 | insn = XVECEXP (insn, 0, 0); | |
1410 | if (GET_CODE (insn) == SET) | |
1411 | insn = SET_SRC (insn); | |
1412 | gcc_assert (GET_CODE (insn) == CALL); | |
1413 | dwarf2out_args_size ("", INTVAL (XEXP (insn, 1))); | |
1414 | } | |
1415 | return; | |
1416 | } | |
1417 | ||
1418 | if (CALL_P (insn) && !after_p) | |
1419 | { | |
1420 | if (!flag_asynchronous_unwind_tables) | |
1421 | dwarf2out_args_size ("", args_size); | |
1422 | return; | |
1423 | } | |
1424 | else if (BARRIER_P (insn)) | |
d757b8c9 | 1425 | { |
8aa5820b | 1426 | /* Don't call compute_barrier_args_size () if the only |
1427 | BARRIER is at the end of function. */ | |
1428 | if (barrier_args_size == NULL && next_nonnote_insn (insn)) | |
9396ae97 | 1429 | compute_barrier_args_size (); |
8aa5820b | 1430 | if (barrier_args_size == NULL) |
9396ae97 | 1431 | offset = 0; |
8aa5820b | 1432 | else |
1433 | { | |
1434 | offset = barrier_args_size[INSN_UID (insn)]; | |
1435 | if (offset < 0) | |
1436 | offset = 0; | |
1437 | } | |
9396ae97 | 1438 | |
1439 | offset -= args_size; | |
1440 | #ifndef STACK_GROWS_DOWNWARD | |
1441 | offset = -offset; | |
24db2725 | 1442 | #endif |
d757b8c9 | 1443 | } |
24db2725 | 1444 | else if (GET_CODE (PATTERN (insn)) == SET) |
2f87ccae | 1445 | offset = stack_adjust_offset (PATTERN (insn), args_size, 0); |
6ee89c56 | 1446 | else if (GET_CODE (PATTERN (insn)) == PARALLEL |
1447 | || GET_CODE (PATTERN (insn)) == SEQUENCE) | |
1448 | { | |
1449 | /* There may be stack adjustments inside compound insns. Search | |
8c3f468d | 1450 | for them. */ |
1451 | for (offset = 0, i = XVECLEN (PATTERN (insn), 0) - 1; i >= 0; i--) | |
1452 | if (GET_CODE (XVECEXP (PATTERN (insn), 0, i)) == SET) | |
2f87ccae | 1453 | offset += stack_adjust_offset (XVECEXP (PATTERN (insn), 0, i), |
1454 | args_size, offset); | |
d757b8c9 | 1455 | } |
1456 | else | |
1457 | return; | |
ac02093f | 1458 | |
24db2725 | 1459 | if (offset == 0) |
1460 | return; | |
1461 | ||
fe3cf4b3 | 1462 | label = dwarf2out_cfi_label (); |
1463 | dwarf2out_args_size_adjust (offset, label); | |
1464 | } | |
1465 | ||
1466 | /* Adjust args_size based on stack adjustment OFFSET. */ | |
1467 | ||
1468 | static void | |
1469 | dwarf2out_args_size_adjust (HOST_WIDE_INT offset, const char *label) | |
1470 | { | |
4b72e226 | 1471 | if (cfa.reg == STACK_POINTER_REGNUM) |
1472 | cfa.offset += offset; | |
d757b8c9 | 1473 | |
fe3cf4b3 | 1474 | if (cfa_store.reg == STACK_POINTER_REGNUM) |
1475 | cfa_store.offset += offset; | |
1476 | ||
d757b8c9 | 1477 | #ifndef STACK_GROWS_DOWNWARD |
1478 | offset = -offset; | |
1479 | #endif | |
8c3f468d | 1480 | |
d757b8c9 | 1481 | args_size += offset; |
1482 | if (args_size < 0) | |
1483 | args_size = 0; | |
1484 | ||
4b72e226 | 1485 | def_cfa_1 (label, &cfa); |
535fcfa4 | 1486 | if (flag_asynchronous_unwind_tables) |
1487 | dwarf2out_args_size (label, args_size); | |
d757b8c9 | 1488 | } |
1489 | ||
573aba85 | 1490 | #endif |
1491 | ||
b0d72d68 | 1492 | /* We delay emitting a register save until either (a) we reach the end |
1493 | of the prologue or (b) the register is clobbered. This clusters | |
1494 | register saves so that there are fewer pc advances. */ | |
1495 | ||
fb1e4f4a | 1496 | struct GTY(()) queued_reg_save { |
b0d72d68 | 1497 | struct queued_reg_save *next; |
1498 | rtx reg; | |
3d867824 | 1499 | HOST_WIDE_INT cfa_offset; |
60ea93bb | 1500 | rtx saved_reg; |
b0d72d68 | 1501 | }; |
1502 | ||
573aba85 | 1503 | static GTY(()) struct queued_reg_save *queued_reg_saves; |
1504 | ||
60ea93bb | 1505 | /* The caller's ORIG_REG is saved in SAVED_IN_REG. */ |
fb1e4f4a | 1506 | struct GTY(()) reg_saved_in_data { |
60ea93bb | 1507 | rtx orig_reg; |
1508 | rtx saved_in_reg; | |
1509 | }; | |
1510 | ||
1511 | /* A list of registers saved in other registers. | |
1512 | The list intentionally has a small maximum capacity of 4; if your | |
1513 | port needs more than that, you might consider implementing a | |
1514 | more efficient data structure. */ | |
1515 | static GTY(()) struct reg_saved_in_data regs_saved_in_regs[4]; | |
1516 | static GTY(()) size_t num_regs_saved_in_regs; | |
8ff30ff6 | 1517 | |
573aba85 | 1518 | #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO) |
b0d72d68 | 1519 | static const char *last_reg_save_label; |
1520 | ||
60ea93bb | 1521 | /* Add an entry to QUEUED_REG_SAVES saying that REG is now saved at |
1522 | SREG, or if SREG is NULL then it is saved at OFFSET to the CFA. */ | |
1523 | ||
b0d72d68 | 1524 | static void |
60ea93bb | 1525 | queue_reg_save (const char *label, rtx reg, rtx sreg, HOST_WIDE_INT offset) |
b0d72d68 | 1526 | { |
60ea93bb | 1527 | struct queued_reg_save *q; |
1528 | ||
1529 | /* Duplicates waste space, but it's also necessary to remove them | |
1530 | for correctness, since the queue gets output in reverse | |
1531 | order. */ | |
1532 | for (q = queued_reg_saves; q != NULL; q = q->next) | |
1533 | if (REGNO (q->reg) == REGNO (reg)) | |
1534 | break; | |
1535 | ||
1536 | if (q == NULL) | |
1537 | { | |
2457c754 | 1538 | q = GGC_NEW (struct queued_reg_save); |
60ea93bb | 1539 | q->next = queued_reg_saves; |
1540 | queued_reg_saves = q; | |
1541 | } | |
b0d72d68 | 1542 | |
b0d72d68 | 1543 | q->reg = reg; |
1544 | q->cfa_offset = offset; | |
60ea93bb | 1545 | q->saved_reg = sreg; |
b0d72d68 | 1546 | |
1547 | last_reg_save_label = label; | |
1548 | } | |
1549 | ||
60ea93bb | 1550 | /* Output all the entries in QUEUED_REG_SAVES. */ |
1551 | ||
b0d72d68 | 1552 | static void |
8ec3a57b | 1553 | flush_queued_reg_saves (void) |
b0d72d68 | 1554 | { |
60ea93bb | 1555 | struct queued_reg_save *q; |
b0d72d68 | 1556 | |
60ea93bb | 1557 | for (q = queued_reg_saves; q; q = q->next) |
b0d72d68 | 1558 | { |
60ea93bb | 1559 | size_t i; |
f481766a | 1560 | unsigned int reg, sreg; |
1561 | ||
60ea93bb | 1562 | for (i = 0; i < num_regs_saved_in_regs; i++) |
1563 | if (REGNO (regs_saved_in_regs[i].orig_reg) == REGNO (q->reg)) | |
1564 | break; | |
1565 | if (q->saved_reg && i == num_regs_saved_in_regs) | |
1566 | { | |
7bd4f6b6 | 1567 | gcc_assert (i != ARRAY_SIZE (regs_saved_in_regs)); |
60ea93bb | 1568 | num_regs_saved_in_regs++; |
1569 | } | |
1570 | if (i != num_regs_saved_in_regs) | |
1571 | { | |
1572 | regs_saved_in_regs[i].orig_reg = q->reg; | |
1573 | regs_saved_in_regs[i].saved_in_reg = q->saved_reg; | |
1574 | } | |
1575 | ||
f481766a | 1576 | reg = DWARF_FRAME_REGNUM (REGNO (q->reg)); |
1577 | if (q->saved_reg) | |
1578 | sreg = DWARF_FRAME_REGNUM (REGNO (q->saved_reg)); | |
1579 | else | |
1580 | sreg = INVALID_REGNUM; | |
1581 | reg_save (last_reg_save_label, reg, sreg, q->cfa_offset); | |
b0d72d68 | 1582 | } |
1583 | ||
1584 | queued_reg_saves = NULL; | |
1585 | last_reg_save_label = NULL; | |
1586 | } | |
1587 | ||
60ea93bb | 1588 | /* Does INSN clobber any register which QUEUED_REG_SAVES lists a saved |
1589 | location for? Or, does it clobber a register which we've previously | |
1590 | said that some other register is saved in, and for which we now | |
1591 | have a new location for? */ | |
1592 | ||
b0d72d68 | 1593 | static bool |
5493cb9a | 1594 | clobbers_queued_reg_save (const_rtx insn) |
b0d72d68 | 1595 | { |
1596 | struct queued_reg_save *q; | |
1597 | ||
bc70bd5e | 1598 | for (q = queued_reg_saves; q; q = q->next) |
60ea93bb | 1599 | { |
1600 | size_t i; | |
1601 | if (modified_in_p (q->reg, insn)) | |
1602 | return true; | |
1603 | for (i = 0; i < num_regs_saved_in_regs; i++) | |
1604 | if (REGNO (q->reg) == REGNO (regs_saved_in_regs[i].orig_reg) | |
1605 | && modified_in_p (regs_saved_in_regs[i].saved_in_reg, insn)) | |
1606 | return true; | |
1607 | } | |
b0d72d68 | 1608 | |
1609 | return false; | |
1610 | } | |
bc70bd5e | 1611 | |
567925e3 | 1612 | /* Entry point for saving the first register into the second. */ |
1613 | ||
1614 | void | |
1615 | dwarf2out_reg_save_reg (const char *label, rtx reg, rtx sreg) | |
1616 | { | |
1617 | size_t i; | |
1618 | unsigned int regno, sregno; | |
1619 | ||
1620 | for (i = 0; i < num_regs_saved_in_regs; i++) | |
1621 | if (REGNO (regs_saved_in_regs[i].orig_reg) == REGNO (reg)) | |
1622 | break; | |
1623 | if (i == num_regs_saved_in_regs) | |
1624 | { | |
1625 | gcc_assert (i != ARRAY_SIZE (regs_saved_in_regs)); | |
1626 | num_regs_saved_in_regs++; | |
1627 | } | |
1628 | regs_saved_in_regs[i].orig_reg = reg; | |
1629 | regs_saved_in_regs[i].saved_in_reg = sreg; | |
1630 | ||
1631 | regno = DWARF_FRAME_REGNUM (REGNO (reg)); | |
1632 | sregno = DWARF_FRAME_REGNUM (REGNO (sreg)); | |
1633 | reg_save (label, regno, sregno, 0); | |
1634 | } | |
1635 | ||
60ea93bb | 1636 | /* What register, if any, is currently saved in REG? */ |
1637 | ||
1638 | static rtx | |
1639 | reg_saved_in (rtx reg) | |
1640 | { | |
1641 | unsigned int regn = REGNO (reg); | |
1642 | size_t i; | |
1643 | struct queued_reg_save *q; | |
8ff30ff6 | 1644 | |
60ea93bb | 1645 | for (q = queued_reg_saves; q; q = q->next) |
1646 | if (q->saved_reg && regn == REGNO (q->saved_reg)) | |
1647 | return q->reg; | |
1648 | ||
1649 | for (i = 0; i < num_regs_saved_in_regs; i++) | |
1650 | if (regs_saved_in_regs[i].saved_in_reg | |
1651 | && regn == REGNO (regs_saved_in_regs[i].saved_in_reg)) | |
1652 | return regs_saved_in_regs[i].orig_reg; | |
1653 | ||
1654 | return NULL_RTX; | |
1655 | } | |
1656 | ||
b0d72d68 | 1657 | |
950ae8fe | 1658 | /* A temporary register holding an integral value used in adjusting SP |
1659 | or setting up the store_reg. The "offset" field holds the integer | |
1660 | value, not an offset. */ | |
b0d72d68 | 1661 | static dw_cfa_location cfa_temp; |
950ae8fe | 1662 | |
1663 | /* Record call frame debugging information for an expression EXPR, | |
1664 | which either sets SP or FP (adjusting how we calculate the frame | |
60ea93bb | 1665 | address) or saves a register to the stack or another register. |
1666 | LABEL indicates the address of EXPR. | |
950ae8fe | 1667 | |
1668 | This function encodes a state machine mapping rtxes to actions on | |
1669 | cfa, cfa_store, and cfa_temp.reg. We describe these rules so | |
1670 | users need not read the source code. | |
1671 | ||
ae8c6892 | 1672 | The High-Level Picture |
1673 | ||
1674 | Changes in the register we use to calculate the CFA: Currently we | |
1675 | assume that if you copy the CFA register into another register, we | |
1676 | should take the other one as the new CFA register; this seems to | |
1677 | work pretty well. If it's wrong for some target, it's simple | |
1678 | enough not to set RTX_FRAME_RELATED_P on the insn in question. | |
1679 | ||
1680 | Changes in the register we use for saving registers to the stack: | |
1681 | This is usually SP, but not always. Again, we deduce that if you | |
1682 | copy SP into another register (and SP is not the CFA register), | |
1683 | then the new register is the one we will be using for register | |
1684 | saves. This also seems to work. | |
1685 | ||
1686 | Register saves: There's not much guesswork about this one; if | |
1687 | RTX_FRAME_RELATED_P is set on an insn which modifies memory, it's a | |
1688 | register save, and the register used to calculate the destination | |
1689 | had better be the one we think we're using for this purpose. | |
60ea93bb | 1690 | It's also assumed that a copy from a call-saved register to another |
1691 | register is saving that register if RTX_FRAME_RELATED_P is set on | |
1692 | that instruction. If the copy is from a call-saved register to | |
1693 | the *same* register, that means that the register is now the same | |
1694 | value as in the caller. | |
ae8c6892 | 1695 | |
1696 | Except: If the register being saved is the CFA register, and the | |
6ef828f9 | 1697 | offset is nonzero, we are saving the CFA, so we assume we have to |
ae8c6892 | 1698 | use DW_CFA_def_cfa_expression. If the offset is 0, we assume that |
1699 | the intent is to save the value of SP from the previous frame. | |
1700 | ||
60ea93bb | 1701 | In addition, if a register has previously been saved to a different |
8ff30ff6 | 1702 | register, |
60ea93bb | 1703 | |
950ae8fe | 1704 | Invariants / Summaries of Rules |
1705 | ||
ae8c6892 | 1706 | cfa current rule for calculating the CFA. It usually |
1707 | consists of a register and an offset. | |
950ae8fe | 1708 | cfa_store register used by prologue code to save things to the stack |
1709 | cfa_store.offset is the offset from the value of | |
1710 | cfa_store.reg to the actual CFA | |
1711 | cfa_temp register holding an integral value. cfa_temp.offset | |
1712 | stores the value, which will be used to adjust the | |
cc858176 | 1713 | stack pointer. cfa_temp is also used like cfa_store, |
1714 | to track stores to the stack via fp or a temp reg. | |
bc70bd5e | 1715 | |
950ae8fe | 1716 | Rules 1- 4: Setting a register's value to cfa.reg or an expression |
8ec3a57b | 1717 | with cfa.reg as the first operand changes the cfa.reg and its |
cc858176 | 1718 | cfa.offset. Rule 1 and 4 also set cfa_temp.reg and |
1719 | cfa_temp.offset. | |
950ae8fe | 1720 | |
1721 | Rules 6- 9: Set a non-cfa.reg register value to a constant or an | |
1722 | expression yielding a constant. This sets cfa_temp.reg | |
1723 | and cfa_temp.offset. | |
1724 | ||
1725 | Rule 5: Create a new register cfa_store used to save items to the | |
1726 | stack. | |
1727 | ||
cc858176 | 1728 | Rules 10-14: Save a register to the stack. Define offset as the |
ae8c6892 | 1729 | difference of the original location and cfa_store's |
cc858176 | 1730 | location (or cfa_temp's location if cfa_temp is used). |
950ae8fe | 1731 | |
27a7a23a | 1732 | Rules 16-20: If AND operation happens on sp in prologue, we assume |
1733 | stack is realigned. We will use a group of DW_OP_XXX | |
1734 | expressions to represent the location of the stored | |
1735 | register instead of CFA+offset. | |
1736 | ||
950ae8fe | 1737 | The Rules |
1738 | ||
1739 | "{a,b}" indicates a choice of a xor b. | |
1740 | "<reg>:cfa.reg" indicates that <reg> must equal cfa.reg. | |
1741 | ||
1742 | Rule 1: | |
1743 | (set <reg1> <reg2>:cfa.reg) | |
cc858176 | 1744 | effects: cfa.reg = <reg1> |
c83a163c | 1745 | cfa.offset unchanged |
cc858176 | 1746 | cfa_temp.reg = <reg1> |
1747 | cfa_temp.offset = cfa.offset | |
950ae8fe | 1748 | |
1749 | Rule 2: | |
8c3f468d | 1750 | (set sp ({minus,plus,losum} {sp,fp}:cfa.reg |
1751 | {<const_int>,<reg>:cfa_temp.reg})) | |
950ae8fe | 1752 | effects: cfa.reg = sp if fp used |
8ec3a57b | 1753 | cfa.offset += {+/- <const_int>, cfa_temp.offset} if cfa.reg==sp |
950ae8fe | 1754 | cfa_store.offset += {+/- <const_int>, cfa_temp.offset} |
1755 | if cfa_store.reg==sp | |
1756 | ||
1757 | Rule 3: | |
cc858176 | 1758 | (set fp ({minus,plus,losum} <reg>:cfa.reg <const_int>)) |
950ae8fe | 1759 | effects: cfa.reg = fp |
8ec3a57b | 1760 | cfa_offset += +/- <const_int> |
950ae8fe | 1761 | |
1762 | Rule 4: | |
cc858176 | 1763 | (set <reg1> ({plus,losum} <reg2>:cfa.reg <const_int>)) |
950ae8fe | 1764 | constraints: <reg1> != fp |
8ec3a57b | 1765 | <reg1> != sp |
950ae8fe | 1766 | effects: cfa.reg = <reg1> |
cc858176 | 1767 | cfa_temp.reg = <reg1> |
1768 | cfa_temp.offset = cfa.offset | |
950ae8fe | 1769 | |
1770 | Rule 5: | |
1771 | (set <reg1> (plus <reg2>:cfa_temp.reg sp:cfa.reg)) | |
1772 | constraints: <reg1> != fp | |
8ec3a57b | 1773 | <reg1> != sp |
950ae8fe | 1774 | effects: cfa_store.reg = <reg1> |
8ec3a57b | 1775 | cfa_store.offset = cfa.offset - cfa_temp.offset |
950ae8fe | 1776 | |
1777 | Rule 6: | |
1778 | (set <reg> <const_int>) | |
1779 | effects: cfa_temp.reg = <reg> | |
8ec3a57b | 1780 | cfa_temp.offset = <const_int> |
950ae8fe | 1781 | |
1782 | Rule 7: | |
1783 | (set <reg1>:cfa_temp.reg (ior <reg2>:cfa_temp.reg <const_int>)) | |
1784 | effects: cfa_temp.reg = <reg1> | |
1785 | cfa_temp.offset |= <const_int> | |
1786 | ||
1787 | Rule 8: | |
1788 | (set <reg> (high <exp>)) | |
1789 | effects: none | |
1790 | ||
1791 | Rule 9: | |
1792 | (set <reg> (lo_sum <exp> <const_int>)) | |
1793 | effects: cfa_temp.reg = <reg> | |
8ec3a57b | 1794 | cfa_temp.offset = <const_int> |
950ae8fe | 1795 | |
1796 | Rule 10: | |
1797 | (set (mem (pre_modify sp:cfa_store (???? <reg1> <const_int>))) <reg2>) | |
1798 | effects: cfa_store.offset -= <const_int> | |
1799 | cfa.offset = cfa_store.offset if cfa.reg == sp | |
950ae8fe | 1800 | cfa.reg = sp |
cc858176 | 1801 | cfa.base_offset = -cfa_store.offset |
950ae8fe | 1802 | |
1803 | Rule 11: | |
1804 | (set (mem ({pre_inc,pre_dec} sp:cfa_store.reg)) <reg>) | |
1805 | effects: cfa_store.offset += -/+ mode_size(mem) | |
1806 | cfa.offset = cfa_store.offset if cfa.reg == sp | |
950ae8fe | 1807 | cfa.reg = sp |
cc858176 | 1808 | cfa.base_offset = -cfa_store.offset |
950ae8fe | 1809 | |
1810 | Rule 12: | |
8c3f468d | 1811 | (set (mem ({minus,plus,losum} <reg1>:{cfa_store,cfa_temp} <const_int>)) |
1812 | ||
1813 | <reg2>) | |
cc858176 | 1814 | effects: cfa.reg = <reg1> |
1815 | cfa.base_offset = -/+ <const_int> - {cfa_store,cfa_temp}.offset | |
950ae8fe | 1816 | |
1817 | Rule 13: | |
cc858176 | 1818 | (set (mem <reg1>:{cfa_store,cfa_temp}) <reg2>) |
1819 | effects: cfa.reg = <reg1> | |
1820 | cfa.base_offset = -{cfa_store,cfa_temp}.offset | |
1821 | ||
1822 | Rule 14: | |
1823 | (set (mem (postinc <reg1>:cfa_temp <const_int>)) <reg2>) | |
1824 | effects: cfa.reg = <reg1> | |
1825 | cfa.base_offset = -cfa_temp.offset | |
d15ee1a5 | 1826 | cfa_temp.offset -= mode_size(mem) |
1827 | ||
85fdc672 | 1828 | Rule 15: |
1829 | (set <reg> {unspec, unspec_volatile}) | |
27a7a23a | 1830 | effects: target-dependent |
1831 | ||
1832 | Rule 16: | |
1833 | (set sp (and: sp <const_int>)) | |
1834 | constraints: cfa_store.reg == sp | |
1835 | effects: current_fde.stack_realign = 1 | |
1836 | cfa_store.offset = 0 | |
1837 | fde->drap_reg = cfa.reg if cfa.reg != sp and cfa.reg != fp | |
1838 | ||
1839 | Rule 17: | |
1840 | (set (mem ({pre_inc, pre_dec} sp)) (mem (plus (cfa.reg) (const_int)))) | |
1841 | effects: cfa_store.offset += -/+ mode_size(mem) | |
1842 | ||
1843 | Rule 18: | |
1844 | (set (mem ({pre_inc, pre_dec} sp)) fp) | |
1845 | constraints: fde->stack_realign == 1 | |
1846 | effects: cfa_store.offset = 0 | |
1847 | cfa.reg != HARD_FRAME_POINTER_REGNUM | |
1848 | ||
1849 | Rule 19: | |
1850 | (set (mem ({pre_inc, pre_dec} sp)) cfa.reg) | |
1851 | constraints: fde->stack_realign == 1 | |
1852 | && cfa.offset == 0 | |
1853 | && cfa.indirect == 0 | |
1854 | && cfa.reg != HARD_FRAME_POINTER_REGNUM | |
1855 | effects: Use DW_CFA_def_cfa_expression to define cfa | |
1856 | cfa.reg == fde->drap_reg | |
1857 | ||
1858 | Rule 20: | |
1859 | (set reg fde->drap_reg) | |
1860 | constraints: fde->vdrap_reg == INVALID_REGNUM | |
1861 | effects: fde->vdrap_reg = reg. | |
1862 | (set mem fde->drap_reg) | |
1863 | constraints: fde->drap_reg_saved == 1 | |
1864 | effects: none. */ | |
fa19b467 | 1865 | |
1866 | static void | |
8ec3a57b | 1867 | dwarf2out_frame_debug_expr (rtx expr, const char *label) |
fa19b467 | 1868 | { |
bf2e2aa9 | 1869 | rtx src, dest, span; |
8c3f468d | 1870 | HOST_WIDE_INT offset; |
27a7a23a | 1871 | dw_fde_ref fde; |
f80d1bcd | 1872 | |
1873 | /* If RTX_FRAME_RELATED_P is set on a PARALLEL, process each member of | |
1874 | the PARALLEL independently. The first element is always processed if | |
950ae8fe | 1875 | it is a SET. This is for backward compatibility. Other elements |
f80d1bcd | 1876 | are processed only if they are SETs and the RTX_FRAME_RELATED_P |
1877 | flag is set in them. */ | |
8c3f468d | 1878 | if (GET_CODE (expr) == PARALLEL || GET_CODE (expr) == SEQUENCE) |
f80d1bcd | 1879 | { |
fa19b467 | 1880 | int par_index; |
1881 | int limit = XVECLEN (expr, 0); | |
a1d50f1d | 1882 | rtx elem; |
1883 | ||
1884 | /* PARALLELs have strict read-modify-write semantics, so we | |
1885 | ought to evaluate every rvalue before changing any lvalue. | |
1886 | It's cumbersome to do that in general, but there's an | |
1887 | easy approximation that is enough for all current users: | |
1888 | handle register saves before register assignments. */ | |
1889 | if (GET_CODE (expr) == PARALLEL) | |
1890 | for (par_index = 0; par_index < limit; par_index++) | |
1891 | { | |
1892 | elem = XVECEXP (expr, 0, par_index); | |
1893 | if (GET_CODE (elem) == SET | |
1894 | && MEM_P (SET_DEST (elem)) | |
1895 | && (RTX_FRAME_RELATED_P (elem) || par_index == 0)) | |
1896 | dwarf2out_frame_debug_expr (elem, label); | |
1897 | } | |
fa19b467 | 1898 | |
1899 | for (par_index = 0; par_index < limit; par_index++) | |
a1d50f1d | 1900 | { |
1901 | elem = XVECEXP (expr, 0, par_index); | |
1902 | if (GET_CODE (elem) == SET | |
1903 | && (!MEM_P (SET_DEST (elem)) || GET_CODE (expr) == SEQUENCE) | |
1904 | && (RTX_FRAME_RELATED_P (elem) || par_index == 0)) | |
1905 | dwarf2out_frame_debug_expr (elem, label); | |
6c504100 | 1906 | else if (GET_CODE (elem) == SET |
1907 | && par_index != 0 | |
1908 | && !RTX_FRAME_RELATED_P (elem)) | |
1909 | { | |
1910 | /* Stack adjustment combining might combine some post-prologue | |
1911 | stack adjustment into a prologue stack adjustment. */ | |
2f87ccae | 1912 | HOST_WIDE_INT offset = stack_adjust_offset (elem, args_size, 0); |
6c504100 | 1913 | |
1914 | if (offset != 0) | |
fe3cf4b3 | 1915 | dwarf2out_args_size_adjust (offset, label); |
6c504100 | 1916 | } |
a1d50f1d | 1917 | } |
fa19b467 | 1918 | return; |
1919 | } | |
f80d1bcd | 1920 | |
7bd4f6b6 | 1921 | gcc_assert (GET_CODE (expr) == SET); |
fa19b467 | 1922 | |
1923 | src = SET_SRC (expr); | |
1924 | dest = SET_DEST (expr); | |
1925 | ||
1c14a50e | 1926 | if (REG_P (src)) |
60ea93bb | 1927 | { |
1928 | rtx rsi = reg_saved_in (src); | |
1929 | if (rsi) | |
1930 | src = rsi; | |
1931 | } | |
1932 | ||
27a7a23a | 1933 | fde = current_fde (); |
1934 | ||
1935 | if (GET_CODE (src) == REG | |
1936 | && fde | |
1937 | && fde->drap_reg == REGNO (src) | |
1938 | && (fde->drap_reg_saved | |
1939 | || GET_CODE (dest) == REG)) | |
1940 | { | |
1941 | /* Rule 20 */ | |
1942 | /* If we are saving dynamic realign argument pointer to a | |
1943 | register, the destination is virtual dynamic realign | |
1944 | argument pointer. It may be used to access argument. */ | |
1945 | if (GET_CODE (dest) == REG) | |
1946 | { | |
1947 | gcc_assert (fde->vdrap_reg == INVALID_REGNUM); | |
1948 | fde->vdrap_reg = REGNO (dest); | |
1949 | } | |
1950 | return; | |
1951 | } | |
1952 | ||
fa19b467 | 1953 | switch (GET_CODE (dest)) |
1954 | { | |
1955 | case REG: | |
fa19b467 | 1956 | switch (GET_CODE (src)) |
f80d1bcd | 1957 | { |
1958 | /* Setting FP from SP. */ | |
1959 | case REG: | |
1960 | if (cfa.reg == (unsigned) REGNO (src)) | |
60ea93bb | 1961 | { |
1962 | /* Rule 1 */ | |
1963 | /* Update the CFA rule wrt SP or FP. Make sure src is | |
8ff30ff6 | 1964 | relative to the current CFA register. |
60ea93bb | 1965 | |
1966 | We used to require that dest be either SP or FP, but the | |
1967 | ARM copies SP to a temporary register, and from there to | |
1968 | FP. So we just rely on the backends to only set | |
1969 | RTX_FRAME_RELATED_P on appropriate insns. */ | |
1970 | cfa.reg = REGNO (dest); | |
1971 | cfa_temp.reg = cfa.reg; | |
1972 | cfa_temp.offset = cfa.offset; | |
1973 | } | |
7bd4f6b6 | 1974 | else |
60ea93bb | 1975 | { |
1976 | /* Saving a register in a register. */ | |
ed86dceb | 1977 | gcc_assert (!fixed_regs [REGNO (dest)] |
1978 | /* For the SPARC and its register window. */ | |
1979 | || (DWARF_FRAME_REGNUM (REGNO (src)) | |
1980 | == DWARF_FRAME_RETURN_COLUMN)); | |
27a7a23a | 1981 | |
1982 | /* After stack is aligned, we can only save SP in FP | |
1983 | if drap register is used. In this case, we have | |
1984 | to restore stack pointer with the CFA value and we | |
1985 | don't generate this DWARF information. */ | |
1986 | if (fde | |
1987 | && fde->stack_realign | |
1988 | && REGNO (src) == STACK_POINTER_REGNUM) | |
1989 | gcc_assert (REGNO (dest) == HARD_FRAME_POINTER_REGNUM | |
1990 | && fde->drap_reg != INVALID_REGNUM | |
1991 | && cfa.reg != REGNO (src)); | |
1992 | else | |
1993 | queue_reg_save (label, src, dest, 0); | |
60ea93bb | 1994 | } |
f80d1bcd | 1995 | break; |
fa19b467 | 1996 | |
f80d1bcd | 1997 | case PLUS: |
1998 | case MINUS: | |
cc858176 | 1999 | case LO_SUM: |
f80d1bcd | 2000 | if (dest == stack_pointer_rtx) |
2001 | { | |
950ae8fe | 2002 | /* Rule 2 */ |
31306376 | 2003 | /* Adjusting SP. */ |
2004 | switch (GET_CODE (XEXP (src, 1))) | |
2005 | { | |
2006 | case CONST_INT: | |
2007 | offset = INTVAL (XEXP (src, 1)); | |
2008 | break; | |
2009 | case REG: | |
7bd4f6b6 | 2010 | gcc_assert ((unsigned) REGNO (XEXP (src, 1)) |
2011 | == cfa_temp.reg); | |
950ae8fe | 2012 | offset = cfa_temp.offset; |
31306376 | 2013 | break; |
2014 | default: | |
7bd4f6b6 | 2015 | gcc_unreachable (); |
31306376 | 2016 | } |
2017 | ||
2018 | if (XEXP (src, 0) == hard_frame_pointer_rtx) | |
2019 | { | |
2020 | /* Restoring SP from FP in the epilogue. */ | |
7bd4f6b6 | 2021 | gcc_assert (cfa.reg == (unsigned) HARD_FRAME_POINTER_REGNUM); |
4b72e226 | 2022 | cfa.reg = STACK_POINTER_REGNUM; |
31306376 | 2023 | } |
cc858176 | 2024 | else if (GET_CODE (src) == LO_SUM) |
2025 | /* Assume we've set the source reg of the LO_SUM from sp. */ | |
2026 | ; | |
7bd4f6b6 | 2027 | else |
2028 | gcc_assert (XEXP (src, 0) == stack_pointer_rtx); | |
31306376 | 2029 | |
cc858176 | 2030 | if (GET_CODE (src) != MINUS) |
31306376 | 2031 | offset = -offset; |
4b72e226 | 2032 | if (cfa.reg == STACK_POINTER_REGNUM) |
2033 | cfa.offset += offset; | |
2034 | if (cfa_store.reg == STACK_POINTER_REGNUM) | |
2035 | cfa_store.offset += offset; | |
f80d1bcd | 2036 | } |
2037 | else if (dest == hard_frame_pointer_rtx) | |
2038 | { | |
950ae8fe | 2039 | /* Rule 3 */ |
31306376 | 2040 | /* Either setting the FP from an offset of the SP, |
2041 | or adjusting the FP */ | |
7bd4f6b6 | 2042 | gcc_assert (frame_pointer_needed); |
31306376 | 2043 | |
7bd4f6b6 | 2044 | gcc_assert (REG_P (XEXP (src, 0)) |
2045 | && (unsigned) REGNO (XEXP (src, 0)) == cfa.reg | |
2046 | && GET_CODE (XEXP (src, 1)) == CONST_INT); | |
2047 | offset = INTVAL (XEXP (src, 1)); | |
2048 | if (GET_CODE (src) != MINUS) | |
2049 | offset = -offset; | |
2050 | cfa.offset += offset; | |
2051 | cfa.reg = HARD_FRAME_POINTER_REGNUM; | |
f80d1bcd | 2052 | } |
2053 | else | |
2054 | { | |
7bd4f6b6 | 2055 | gcc_assert (GET_CODE (src) != MINUS); |
4747ea36 | 2056 | |
950ae8fe | 2057 | /* Rule 4 */ |
8ad4c111 | 2058 | if (REG_P (XEXP (src, 0)) |
4747ea36 | 2059 | && REGNO (XEXP (src, 0)) == cfa.reg |
2060 | && GET_CODE (XEXP (src, 1)) == CONST_INT) | |
9b536fa6 | 2061 | { |
2062 | /* Setting a temporary CFA register that will be copied | |
2063 | into the FP later on. */ | |
cc858176 | 2064 | offset = - INTVAL (XEXP (src, 1)); |
9b536fa6 | 2065 | cfa.offset += offset; |
2066 | cfa.reg = REGNO (dest); | |
cc858176 | 2067 | /* Or used to save regs to the stack. */ |
2068 | cfa_temp.reg = cfa.reg; | |
2069 | cfa_temp.offset = cfa.offset; | |
9b536fa6 | 2070 | } |
8c3f468d | 2071 | |
950ae8fe | 2072 | /* Rule 5 */ |
8ad4c111 | 2073 | else if (REG_P (XEXP (src, 0)) |
cc858176 | 2074 | && REGNO (XEXP (src, 0)) == cfa_temp.reg |
2075 | && XEXP (src, 1) == stack_pointer_rtx) | |
4747ea36 | 2076 | { |
ca6c45a9 | 2077 | /* Setting a scratch register that we will use instead |
2078 | of SP for saving registers to the stack. */ | |
7bd4f6b6 | 2079 | gcc_assert (cfa.reg == STACK_POINTER_REGNUM); |
4747ea36 | 2080 | cfa_store.reg = REGNO (dest); |
950ae8fe | 2081 | cfa_store.offset = cfa.offset - cfa_temp.offset; |
4747ea36 | 2082 | } |
8c3f468d | 2083 | |
cc858176 | 2084 | /* Rule 9 */ |
2085 | else if (GET_CODE (src) == LO_SUM | |
2086 | && GET_CODE (XEXP (src, 1)) == CONST_INT) | |
2087 | { | |
2088 | cfa_temp.reg = REGNO (dest); | |
2089 | cfa_temp.offset = INTVAL (XEXP (src, 1)); | |
2090 | } | |
2091 | else | |
7bd4f6b6 | 2092 | gcc_unreachable (); |
f80d1bcd | 2093 | } |
2094 | break; | |
fa19b467 | 2095 | |
950ae8fe | 2096 | /* Rule 6 */ |
f80d1bcd | 2097 | case CONST_INT: |
950ae8fe | 2098 | cfa_temp.reg = REGNO (dest); |
2099 | cfa_temp.offset = INTVAL (src); | |
f80d1bcd | 2100 | break; |
fa19b467 | 2101 | |
950ae8fe | 2102 | /* Rule 7 */ |
f80d1bcd | 2103 | case IOR: |
7bd4f6b6 | 2104 | gcc_assert (REG_P (XEXP (src, 0)) |
2105 | && (unsigned) REGNO (XEXP (src, 0)) == cfa_temp.reg | |
2106 | && GET_CODE (XEXP (src, 1)) == CONST_INT); | |
8c3f468d | 2107 | |
950ae8fe | 2108 | if ((unsigned) REGNO (dest) != cfa_temp.reg) |
2109 | cfa_temp.reg = REGNO (dest); | |
2110 | cfa_temp.offset |= INTVAL (XEXP (src, 1)); | |
f80d1bcd | 2111 | break; |
fa19b467 | 2112 | |
e0cedf2c | 2113 | /* Skip over HIGH, assuming it will be followed by a LO_SUM, |
2114 | which will fill in all of the bits. */ | |
2115 | /* Rule 8 */ | |
2116 | case HIGH: | |
2117 | break; | |
2118 | ||
d15ee1a5 | 2119 | /* Rule 15 */ |
2120 | case UNSPEC: | |
2121 | case UNSPEC_VOLATILE: | |
2122 | gcc_assert (targetm.dwarf_handle_frame_unspec); | |
2123 | targetm.dwarf_handle_frame_unspec (label, expr, XINT (src, 1)); | |
567925e3 | 2124 | return; |
d15ee1a5 | 2125 | |
27a7a23a | 2126 | /* Rule 16 */ |
2127 | case AND: | |
2128 | /* If this AND operation happens on stack pointer in prologue, | |
2129 | we assume the stack is realigned and we extract the | |
2130 | alignment. */ | |
2131 | if (fde && XEXP (src, 0) == stack_pointer_rtx) | |
2132 | { | |
2133 | gcc_assert (cfa_store.reg == REGNO (XEXP (src, 0))); | |
2134 | fde->stack_realign = 1; | |
2135 | fde->stack_realignment = INTVAL (XEXP (src, 1)); | |
2136 | cfa_store.offset = 0; | |
2137 | ||
2138 | if (cfa.reg != STACK_POINTER_REGNUM | |
2139 | && cfa.reg != HARD_FRAME_POINTER_REGNUM) | |
2140 | fde->drap_reg = cfa.reg; | |
2141 | } | |
2142 | return; | |
2143 | ||
f80d1bcd | 2144 | default: |
7bd4f6b6 | 2145 | gcc_unreachable (); |
f80d1bcd | 2146 | } |
8c3f468d | 2147 | |
4b72e226 | 2148 | def_cfa_1 (label, &cfa); |
31306376 | 2149 | break; |
fa19b467 | 2150 | |
31306376 | 2151 | case MEM: |
4b72e226 | 2152 | |
4b72e226 | 2153 | /* Saving a register to the stack. Make sure dest is relative to the |
2154 | CFA register. */ | |
31306376 | 2155 | switch (GET_CODE (XEXP (dest, 0))) |
2156 | { | |
950ae8fe | 2157 | /* Rule 10 */ |
31306376 | 2158 | /* With a push. */ |
93fbe1f3 | 2159 | case PRE_MODIFY: |
2160 | /* We can't handle variable size modifications. */ | |
7bd4f6b6 | 2161 | gcc_assert (GET_CODE (XEXP (XEXP (XEXP (dest, 0), 1), 1)) |
2162 | == CONST_INT); | |
93fbe1f3 | 2163 | offset = -INTVAL (XEXP (XEXP (XEXP (dest, 0), 1), 1)); |
2164 | ||
7bd4f6b6 | 2165 | gcc_assert (REGNO (XEXP (XEXP (dest, 0), 0)) == STACK_POINTER_REGNUM |
2166 | && cfa_store.reg == STACK_POINTER_REGNUM); | |
8c3f468d | 2167 | |
93fbe1f3 | 2168 | cfa_store.offset += offset; |
2169 | if (cfa.reg == STACK_POINTER_REGNUM) | |
2170 | cfa.offset = cfa_store.offset; | |
2171 | ||
2172 | offset = -cfa_store.offset; | |
2173 | break; | |
8c3f468d | 2174 | |
950ae8fe | 2175 | /* Rule 11 */ |
31306376 | 2176 | case PRE_INC: |
2177 | case PRE_DEC: | |
2178 | offset = GET_MODE_SIZE (GET_MODE (dest)); | |
2179 | if (GET_CODE (XEXP (dest, 0)) == PRE_INC) | |
2180 | offset = -offset; | |
fa19b467 | 2181 | |
27a7a23a | 2182 | gcc_assert ((REGNO (XEXP (XEXP (dest, 0), 0)) |
2183 | == STACK_POINTER_REGNUM) | |
7bd4f6b6 | 2184 | && cfa_store.reg == STACK_POINTER_REGNUM); |
8c3f468d | 2185 | |
4b72e226 | 2186 | cfa_store.offset += offset; |
27a7a23a | 2187 | |
2188 | /* Rule 18: If stack is aligned, we will use FP as a | |
2189 | reference to represent the address of the stored | |
2190 | regiser. */ | |
2191 | if (fde | |
2192 | && fde->stack_realign | |
2193 | && src == hard_frame_pointer_rtx) | |
2194 | { | |
2195 | gcc_assert (cfa.reg != HARD_FRAME_POINTER_REGNUM); | |
2196 | cfa_store.offset = 0; | |
2197 | } | |
2198 | ||
4b72e226 | 2199 | if (cfa.reg == STACK_POINTER_REGNUM) |
2200 | cfa.offset = cfa_store.offset; | |
fa19b467 | 2201 | |
4b72e226 | 2202 | offset = -cfa_store.offset; |
31306376 | 2203 | break; |
fa19b467 | 2204 | |
950ae8fe | 2205 | /* Rule 12 */ |
31306376 | 2206 | /* With an offset. */ |
2207 | case PLUS: | |
2208 | case MINUS: | |
cc858176 | 2209 | case LO_SUM: |
7bd4f6b6 | 2210 | { |
2211 | int regno; | |
8ff30ff6 | 2212 | |
ccb88806 | 2213 | gcc_assert (GET_CODE (XEXP (XEXP (dest, 0), 1)) == CONST_INT |
2214 | && REG_P (XEXP (XEXP (dest, 0), 0))); | |
7bd4f6b6 | 2215 | offset = INTVAL (XEXP (XEXP (dest, 0), 1)); |
2216 | if (GET_CODE (XEXP (dest, 0)) == MINUS) | |
2217 | offset = -offset; | |
2218 | ||
2219 | regno = REGNO (XEXP (XEXP (dest, 0), 0)); | |
8ff30ff6 | 2220 | |
7bd4f6b6 | 2221 | if (cfa_store.reg == (unsigned) regno) |
2222 | offset -= cfa_store.offset; | |
2223 | else | |
2224 | { | |
2225 | gcc_assert (cfa_temp.reg == (unsigned) regno); | |
2226 | offset -= cfa_temp.offset; | |
2227 | } | |
2228 | } | |
31306376 | 2229 | break; |
2230 | ||
950ae8fe | 2231 | /* Rule 13 */ |
31306376 | 2232 | /* Without an offset. */ |
2233 | case REG: | |
7bd4f6b6 | 2234 | { |
2235 | int regno = REGNO (XEXP (dest, 0)); | |
8ff30ff6 | 2236 | |
7bd4f6b6 | 2237 | if (cfa_store.reg == (unsigned) regno) |
2238 | offset = -cfa_store.offset; | |
2239 | else | |
2240 | { | |
2241 | gcc_assert (cfa_temp.reg == (unsigned) regno); | |
2242 | offset = -cfa_temp.offset; | |
2243 | } | |
2244 | } | |
cc858176 | 2245 | break; |
2246 | ||
2247 | /* Rule 14 */ | |
2248 | case POST_INC: | |
7bd4f6b6 | 2249 | gcc_assert (cfa_temp.reg |
2250 | == (unsigned) REGNO (XEXP (XEXP (dest, 0), 0))); | |
cc858176 | 2251 | offset = -cfa_temp.offset; |
2252 | cfa_temp.offset -= GET_MODE_SIZE (GET_MODE (dest)); | |
31306376 | 2253 | break; |
2254 | ||
2255 | default: | |
7bd4f6b6 | 2256 | gcc_unreachable (); |
31306376 | 2257 | } |
49a9983c | 2258 | |
3d3b5ccd | 2259 | /* Rule 17 */ |
2260 | /* If the source operand of this MEM operation is not a | |
2261 | register, basically the source is return address. Here | |
2262 | we only care how much stack grew and we don't save it. */ | |
2263 | if (!REG_P (src)) | |
2264 | break; | |
2265 | ||
f80d1bcd | 2266 | if (REGNO (src) != STACK_POINTER_REGNUM |
49a9983c | 2267 | && REGNO (src) != HARD_FRAME_POINTER_REGNUM |
2268 | && (unsigned) REGNO (src) == cfa.reg) | |
2269 | { | |
2270 | /* We're storing the current CFA reg into the stack. */ | |
2271 | ||
2272 | if (cfa.offset == 0) | |
2273 | { | |
27a7a23a | 2274 | /* Rule 19 */ |
2275 | /* If stack is aligned, putting CFA reg into stack means | |
2276 | we can no longer use reg + offset to represent CFA. | |
2277 | Here we use DW_CFA_def_cfa_expression instead. The | |
2278 | result of this expression equals to the original CFA | |
2279 | value. */ | |
2280 | if (fde | |
2281 | && fde->stack_realign | |
2282 | && cfa.indirect == 0 | |
2283 | && cfa.reg != HARD_FRAME_POINTER_REGNUM) | |
2284 | { | |
2285 | dw_cfa_location cfa_exp; | |
2286 | ||
2287 | gcc_assert (fde->drap_reg == cfa.reg); | |
2288 | ||
2289 | cfa_exp.indirect = 1; | |
2290 | cfa_exp.reg = HARD_FRAME_POINTER_REGNUM; | |
2291 | cfa_exp.base_offset = offset; | |
2292 | cfa_exp.offset = 0; | |
2293 | ||
2294 | fde->drap_reg_saved = 1; | |
2295 | ||
2296 | def_cfa_1 (label, &cfa_exp); | |
2297 | break; | |
2298 | } | |
2299 | ||
49a9983c | 2300 | /* If the source register is exactly the CFA, assume |
2301 | we're saving SP like any other register; this happens | |
2302 | on the ARM. */ | |
49a9983c | 2303 | def_cfa_1 (label, &cfa); |
60ea93bb | 2304 | queue_reg_save (label, stack_pointer_rtx, NULL_RTX, offset); |
49a9983c | 2305 | break; |
2306 | } | |
2307 | else | |
2308 | { | |
2309 | /* Otherwise, we'll need to look in the stack to | |
c83a163c | 2310 | calculate the CFA. */ |
49a9983c | 2311 | rtx x = XEXP (dest, 0); |
8c3f468d | 2312 | |
8ad4c111 | 2313 | if (!REG_P (x)) |
49a9983c | 2314 | x = XEXP (x, 0); |
7bd4f6b6 | 2315 | gcc_assert (REG_P (x)); |
8c3f468d | 2316 | |
2317 | cfa.reg = REGNO (x); | |
49a9983c | 2318 | cfa.base_offset = offset; |
2319 | cfa.indirect = 1; | |
2320 | def_cfa_1 (label, &cfa); | |
2321 | break; | |
2322 | } | |
2323 | } | |
2324 | ||
4b72e226 | 2325 | def_cfa_1 (label, &cfa); |
bf2e2aa9 | 2326 | { |
2327 | span = targetm.dwarf_register_span (src); | |
2328 | ||
2329 | if (!span) | |
2330 | queue_reg_save (label, src, NULL_RTX, offset); | |
2331 | else | |
2332 | { | |
2333 | /* We have a PARALLEL describing where the contents of SRC | |
2334 | live. Queue register saves for each piece of the | |
2335 | PARALLEL. */ | |
2336 | int par_index; | |
2337 | int limit; | |
2338 | HOST_WIDE_INT span_offset = offset; | |
2339 | ||
2340 | gcc_assert (GET_CODE (span) == PARALLEL); | |
2341 | ||
2342 | limit = XVECLEN (span, 0); | |
2343 | for (par_index = 0; par_index < limit; par_index++) | |
2344 | { | |
2345 | rtx elem = XVECEXP (span, 0, par_index); | |
2346 | ||
2347 | queue_reg_save (label, elem, NULL_RTX, span_offset); | |
2348 | span_offset += GET_MODE_SIZE (GET_MODE (elem)); | |
2349 | } | |
2350 | } | |
2351 | } | |
31306376 | 2352 | break; |
2353 | ||
2354 | default: | |
7bd4f6b6 | 2355 | gcc_unreachable (); |
31306376 | 2356 | } |
fa19b467 | 2357 | } |
2358 | ||
8a8bfbe7 | 2359 | /* Record call frame debugging information for INSN, which either |
2360 | sets SP or FP (adjusting how we calculate the frame address) or saves a | |
535fcfa4 | 2361 | register to the stack. If INSN is NULL_RTX, initialize our state. |
2362 | ||
2363 | If AFTER_P is false, we're being called before the insn is emitted, | |
2364 | otherwise after. Call instructions get invoked twice. */ | |
ec1e49cc | 2365 | |
8a8bfbe7 | 2366 | void |
535fcfa4 | 2367 | dwarf2out_frame_debug (rtx insn, bool after_p) |
30ade641 | 2368 | { |
1e034a40 | 2369 | const char *label; |
fa19b467 | 2370 | rtx src; |
8a8bfbe7 | 2371 | |
2372 | if (insn == NULL_RTX) | |
30ade641 | 2373 | { |
60ea93bb | 2374 | size_t i; |
8ff30ff6 | 2375 | |
b0d72d68 | 2376 | /* Flush any queued register saves. */ |
2377 | flush_queued_reg_saves (); | |
2378 | ||
8a8bfbe7 | 2379 | /* Set up state for generating call frame debug info. */ |
4b72e226 | 2380 | lookup_cfa (&cfa); |
7bd4f6b6 | 2381 | gcc_assert (cfa.reg |
2382 | == (unsigned long)DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM)); | |
8c3f468d | 2383 | |
4b72e226 | 2384 | cfa.reg = STACK_POINTER_REGNUM; |
2385 | cfa_store = cfa; | |
950ae8fe | 2386 | cfa_temp.reg = -1; |
2387 | cfa_temp.offset = 0; | |
8ff30ff6 | 2388 | |
60ea93bb | 2389 | for (i = 0; i < num_regs_saved_in_regs; i++) |
2390 | { | |
2391 | regs_saved_in_regs[i].orig_reg = NULL_RTX; | |
2392 | regs_saved_in_regs[i].saved_in_reg = NULL_RTX; | |
2393 | } | |
2394 | num_regs_saved_in_regs = 0; | |
9396ae97 | 2395 | |
2396 | if (barrier_args_size) | |
2397 | { | |
2398 | XDELETEVEC (barrier_args_size); | |
2399 | barrier_args_size = NULL; | |
2400 | } | |
8a8bfbe7 | 2401 | return; |
2402 | } | |
2403 | ||
6d7dc5b9 | 2404 | if (!NONJUMP_INSN_P (insn) || clobbers_queued_reg_save (insn)) |
b0d72d68 | 2405 | flush_queued_reg_saves (); |
2406 | ||
d757b8c9 | 2407 | if (! RTX_FRAME_RELATED_P (insn)) |
2408 | { | |
b0d72d68 | 2409 | if (!ACCUMULATE_OUTGOING_ARGS) |
535fcfa4 | 2410 | dwarf2out_stack_adjust (insn, after_p); |
d757b8c9 | 2411 | return; |
2412 | } | |
2413 | ||
8a8bfbe7 | 2414 | label = dwarf2out_cfi_label (); |
86b18255 | 2415 | src = find_reg_note (insn, REG_FRAME_RELATED_EXPR, NULL_RTX); |
2416 | if (src) | |
2417 | insn = XEXP (src, 0); | |
f80d1bcd | 2418 | else |
86b18255 | 2419 | insn = PATTERN (insn); |
2420 | ||
fa19b467 | 2421 | dwarf2out_frame_debug_expr (insn, label); |
8a8bfbe7 | 2422 | } |
2423 | ||
573aba85 | 2424 | #endif |
2425 | ||
2426 | /* Describe for the GTY machinery what parts of dw_cfi_oprnd1 are used. */ | |
8ec3a57b | 2427 | static enum dw_cfi_oprnd_type dw_cfi_oprnd1_desc |
2428 | (enum dwarf_call_frame_info cfi); | |
573aba85 | 2429 | |
2430 | static enum dw_cfi_oprnd_type | |
8ec3a57b | 2431 | dw_cfi_oprnd1_desc (enum dwarf_call_frame_info cfi) |
573aba85 | 2432 | { |
2433 | switch (cfi) | |
2434 | { | |
2435 | case DW_CFA_nop: | |
2436 | case DW_CFA_GNU_window_save: | |
2437 | return dw_cfi_oprnd_unused; | |
2438 | ||
2439 | case DW_CFA_set_loc: | |
2440 | case DW_CFA_advance_loc1: | |
2441 | case DW_CFA_advance_loc2: | |
2442 | case DW_CFA_advance_loc4: | |
2443 | case DW_CFA_MIPS_advance_loc8: | |
2444 | return dw_cfi_oprnd_addr; | |
2445 | ||
2446 | case DW_CFA_offset: | |
2447 | case DW_CFA_offset_extended: | |
2448 | case DW_CFA_def_cfa: | |
2449 | case DW_CFA_offset_extended_sf: | |
2450 | case DW_CFA_def_cfa_sf: | |
2451 | case DW_CFA_restore_extended: | |
2452 | case DW_CFA_undefined: | |
2453 | case DW_CFA_same_value: | |
2454 | case DW_CFA_def_cfa_register: | |
2455 | case DW_CFA_register: | |
2456 | return dw_cfi_oprnd_reg_num; | |
2457 | ||
2458 | case DW_CFA_def_cfa_offset: | |
2459 | case DW_CFA_GNU_args_size: | |
2460 | case DW_CFA_def_cfa_offset_sf: | |
2461 | return dw_cfi_oprnd_offset; | |
8ec3a57b | 2462 | |
573aba85 | 2463 | case DW_CFA_def_cfa_expression: |
2464 | case DW_CFA_expression: | |
2465 | return dw_cfi_oprnd_loc; | |
2466 | ||
2467 | default: | |
7bd4f6b6 | 2468 | gcc_unreachable (); |
573aba85 | 2469 | } |
2470 | } | |
2471 | ||
2472 | /* Describe for the GTY machinery what parts of dw_cfi_oprnd2 are used. */ | |
8ec3a57b | 2473 | static enum dw_cfi_oprnd_type dw_cfi_oprnd2_desc |
2474 | (enum dwarf_call_frame_info cfi); | |
573aba85 | 2475 | |
2476 | static enum dw_cfi_oprnd_type | |
8ec3a57b | 2477 | dw_cfi_oprnd2_desc (enum dwarf_call_frame_info cfi) |
573aba85 | 2478 | { |
2479 | switch (cfi) | |
2480 | { | |
2481 | case DW_CFA_def_cfa: | |
2482 | case DW_CFA_def_cfa_sf: | |
2483 | case DW_CFA_offset: | |
2484 | case DW_CFA_offset_extended_sf: | |
2485 | case DW_CFA_offset_extended: | |
2486 | return dw_cfi_oprnd_offset; | |
2487 | ||
2488 | case DW_CFA_register: | |
2489 | return dw_cfi_oprnd_reg_num; | |
2490 | ||
2491 | default: | |
2492 | return dw_cfi_oprnd_unused; | |
2493 | } | |
2494 | } | |
2495 | ||
2496 | #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO) | |
2497 | ||
2f14b1f9 | 2498 | /* Switch to eh_frame_section. If we don't have an eh_frame_section, |
2499 | switch to the data section instead, and write out a synthetic label | |
2500 | for collect2. */ | |
2501 | ||
2502 | static void | |
2503 | switch_to_eh_frame_section (void) | |
2504 | { | |
2505 | tree label; | |
2506 | ||
2943ce06 | 2507 | #ifdef EH_FRAME_SECTION_NAME |
2508 | if (eh_frame_section == 0) | |
2509 | { | |
2510 | int flags; | |
2511 | ||
2512 | if (EH_TABLES_CAN_BE_READ_ONLY) | |
2513 | { | |
2514 | int fde_encoding; | |
2515 | int per_encoding; | |
2516 | int lsda_encoding; | |
2517 | ||
2518 | fde_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/1, | |
2519 | /*global=*/0); | |
2520 | per_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/2, | |
2521 | /*global=*/1); | |
2522 | lsda_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/0, | |
2523 | /*global=*/0); | |
2524 | flags = ((! flag_pic | |
2525 | || ((fde_encoding & 0x70) != DW_EH_PE_absptr | |
2526 | && (fde_encoding & 0x70) != DW_EH_PE_aligned | |
2527 | && (per_encoding & 0x70) != DW_EH_PE_absptr | |
2528 | && (per_encoding & 0x70) != DW_EH_PE_aligned | |
2529 | && (lsda_encoding & 0x70) != DW_EH_PE_absptr | |
2530 | && (lsda_encoding & 0x70) != DW_EH_PE_aligned)) | |
2531 | ? 0 : SECTION_WRITE); | |
2532 | } | |
2533 | else | |
2534 | flags = SECTION_WRITE; | |
2535 | eh_frame_section = get_section (EH_FRAME_SECTION_NAME, flags, NULL); | |
2536 | } | |
2537 | #endif | |
2538 | ||
2f14b1f9 | 2539 | if (eh_frame_section) |
2540 | switch_to_section (eh_frame_section); | |
2541 | else | |
2542 | { | |
2943ce06 | 2543 | /* We have no special eh_frame section. Put the information in |
2544 | the data section and emit special labels to guide collect2. */ | |
2f14b1f9 | 2545 | switch_to_section (data_section); |
db85cc4f | 2546 | label = get_file_function_name ("F"); |
2f14b1f9 | 2547 | ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE)); |
2548 | targetm.asm_out.globalize_label (asm_out_file, | |
2549 | IDENTIFIER_POINTER (label)); | |
2550 | ASM_OUTPUT_LABEL (asm_out_file, IDENTIFIER_POINTER (label)); | |
2551 | } | |
2552 | } | |
2553 | ||
be30e9d9 | 2554 | /* Divide OFF by DWARF_CIE_DATA_ALIGNMENT, asserting no remainder. */ |
2555 | ||
2556 | static HOST_WIDE_INT | |
2557 | div_data_align (HOST_WIDE_INT off) | |
2558 | { | |
2559 | HOST_WIDE_INT r = off / DWARF_CIE_DATA_ALIGNMENT; | |
2560 | gcc_assert (r * DWARF_CIE_DATA_ALIGNMENT == off); | |
2561 | return r; | |
2562 | } | |
2563 | ||
8a8bfbe7 | 2564 | /* Output a Call Frame Information opcode and its operand(s). */ |
2565 | ||
2566 | static void | |
8ec3a57b | 2567 | output_cfi (dw_cfi_ref cfi, dw_fde_ref fde, int for_eh) |
8a8bfbe7 | 2568 | { |
4eeb8b5d | 2569 | unsigned long r; |
be30e9d9 | 2570 | HOST_WIDE_INT off; |
2571 | ||
8a8bfbe7 | 2572 | if (cfi->dw_cfi_opc == DW_CFA_advance_loc) |
8c3f468d | 2573 | dw2_asm_output_data (1, (cfi->dw_cfi_opc |
2574 | | (cfi->dw_cfi_oprnd1.dw_cfi_offset & 0x3f)), | |
3201d6f1 | 2575 | "DW_CFA_advance_loc " HOST_WIDE_INT_PRINT_HEX, |
7df7561b | 2576 | ((unsigned HOST_WIDE_INT) |
2577 | cfi->dw_cfi_oprnd1.dw_cfi_offset)); | |
8a8bfbe7 | 2578 | else if (cfi->dw_cfi_opc == DW_CFA_offset) |
2579 | { | |
4eeb8b5d | 2580 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh); |
2581 | dw2_asm_output_data (1, (cfi->dw_cfi_opc | (r & 0x3f)), | |
2582 | "DW_CFA_offset, column 0x%lx", r); | |
be30e9d9 | 2583 | off = div_data_align (cfi->dw_cfi_oprnd2.dw_cfi_offset); |
2584 | dw2_asm_output_data_uleb128 (off, NULL); | |
8a8bfbe7 | 2585 | } |
2586 | else if (cfi->dw_cfi_opc == DW_CFA_restore) | |
4eeb8b5d | 2587 | { |
2588 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh); | |
2589 | dw2_asm_output_data (1, (cfi->dw_cfi_opc | (r & 0x3f)), | |
2590 | "DW_CFA_restore, column 0x%lx", r); | |
2591 | } | |
8a8bfbe7 | 2592 | else |
2593 | { | |
ca98eb0a | 2594 | dw2_asm_output_data (1, cfi->dw_cfi_opc, |
2595 | "%s", dwarf_cfi_name (cfi->dw_cfi_opc)); | |
8a8bfbe7 | 2596 | |
8a8bfbe7 | 2597 | switch (cfi->dw_cfi_opc) |
2598 | { | |
2599 | case DW_CFA_set_loc: | |
9b84bf7d | 2600 | if (for_eh) |
2601 | dw2_asm_output_encoded_addr_rtx ( | |
2602 | ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/1, /*global=*/0), | |
2603 | gen_rtx_SYMBOL_REF (Pmode, cfi->dw_cfi_oprnd1.dw_cfi_addr), | |
42e07529 | 2604 | false, NULL); |
9b84bf7d | 2605 | else |
2606 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, | |
2607 | cfi->dw_cfi_oprnd1.dw_cfi_addr, NULL); | |
d8eb7025 | 2608 | fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr; |
8a8bfbe7 | 2609 | break; |
8c3f468d | 2610 | |
8a8bfbe7 | 2611 | case DW_CFA_advance_loc1: |
ca98eb0a | 2612 | dw2_asm_output_delta (1, cfi->dw_cfi_oprnd1.dw_cfi_addr, |
2613 | fde->dw_fde_current_label, NULL); | |
c96dd0ff | 2614 | fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr; |
8a8bfbe7 | 2615 | break; |
8c3f468d | 2616 | |
8a8bfbe7 | 2617 | case DW_CFA_advance_loc2: |
ca98eb0a | 2618 | dw2_asm_output_delta (2, cfi->dw_cfi_oprnd1.dw_cfi_addr, |
2619 | fde->dw_fde_current_label, NULL); | |
8a8bfbe7 | 2620 | fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr; |
2621 | break; | |
8c3f468d | 2622 | |
8a8bfbe7 | 2623 | case DW_CFA_advance_loc4: |
ca98eb0a | 2624 | dw2_asm_output_delta (4, cfi->dw_cfi_oprnd1.dw_cfi_addr, |
2625 | fde->dw_fde_current_label, NULL); | |
8a8bfbe7 | 2626 | fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr; |
2627 | break; | |
8c3f468d | 2628 | |
8a8bfbe7 | 2629 | case DW_CFA_MIPS_advance_loc8: |
ca98eb0a | 2630 | dw2_asm_output_delta (8, cfi->dw_cfi_oprnd1.dw_cfi_addr, |
2631 | fde->dw_fde_current_label, NULL); | |
2632 | fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr; | |
8a8bfbe7 | 2633 | break; |
8c3f468d | 2634 | |
8a8bfbe7 | 2635 | case DW_CFA_offset_extended: |
be30e9d9 | 2636 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh); |
2637 | dw2_asm_output_data_uleb128 (r, NULL); | |
2638 | off = div_data_align (cfi->dw_cfi_oprnd2.dw_cfi_offset); | |
2639 | dw2_asm_output_data_uleb128 (off, NULL); | |
2640 | break; | |
2641 | ||
8a8bfbe7 | 2642 | case DW_CFA_def_cfa: |
4eeb8b5d | 2643 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh); |
2644 | dw2_asm_output_data_uleb128 (r, NULL); | |
ca98eb0a | 2645 | dw2_asm_output_data_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset, NULL); |
8a8bfbe7 | 2646 | break; |
8c3f468d | 2647 | |
15a56411 | 2648 | case DW_CFA_offset_extended_sf: |
be30e9d9 | 2649 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh); |
2650 | dw2_asm_output_data_uleb128 (r, NULL); | |
2651 | off = div_data_align (cfi->dw_cfi_oprnd2.dw_cfi_offset); | |
2652 | dw2_asm_output_data_sleb128 (off, NULL); | |
2653 | break; | |
2654 | ||
15a56411 | 2655 | case DW_CFA_def_cfa_sf: |
4eeb8b5d | 2656 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh); |
2657 | dw2_asm_output_data_uleb128 (r, NULL); | |
be30e9d9 | 2658 | off = div_data_align (cfi->dw_cfi_oprnd2.dw_cfi_offset); |
2659 | dw2_asm_output_data_sleb128 (off, NULL); | |
15a56411 | 2660 | break; |
2661 | ||
8a8bfbe7 | 2662 | case DW_CFA_restore_extended: |
2663 | case DW_CFA_undefined: | |
8a8bfbe7 | 2664 | case DW_CFA_same_value: |
2665 | case DW_CFA_def_cfa_register: | |
4eeb8b5d | 2666 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh); |
2667 | dw2_asm_output_data_uleb128 (r, NULL); | |
8a8bfbe7 | 2668 | break; |
8c3f468d | 2669 | |
8a8bfbe7 | 2670 | case DW_CFA_register: |
4eeb8b5d | 2671 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh); |
2672 | dw2_asm_output_data_uleb128 (r, NULL); | |
2673 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd2.dw_cfi_reg_num, for_eh); | |
2674 | dw2_asm_output_data_uleb128 (r, NULL); | |
8a8bfbe7 | 2675 | break; |
8c3f468d | 2676 | |
8a8bfbe7 | 2677 | case DW_CFA_def_cfa_offset: |
ca98eb0a | 2678 | case DW_CFA_GNU_args_size: |
2679 | dw2_asm_output_data_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset, NULL); | |
8a8bfbe7 | 2680 | break; |
8c3f468d | 2681 | |
15a56411 | 2682 | case DW_CFA_def_cfa_offset_sf: |
be30e9d9 | 2683 | off = div_data_align (cfi->dw_cfi_oprnd1.dw_cfi_offset); |
2684 | dw2_asm_output_data_sleb128 (off, NULL); | |
15a56411 | 2685 | break; |
2686 | ||
4ad3f9b3 | 2687 | case DW_CFA_GNU_window_save: |
2688 | break; | |
8c3f468d | 2689 | |
4b72e226 | 2690 | case DW_CFA_def_cfa_expression: |
15a56411 | 2691 | case DW_CFA_expression: |
4b72e226 | 2692 | output_cfa_loc (cfi); |
2693 | break; | |
8c3f468d | 2694 | |
15a56411 | 2695 | case DW_CFA_GNU_negative_offset_extended: |
2696 | /* Obsoleted by DW_CFA_offset_extended_sf. */ | |
7bd4f6b6 | 2697 | gcc_unreachable (); |
15a56411 | 2698 | |
8a8bfbe7 | 2699 | default: |
2700 | break; | |
2701 | } | |
f80d1bcd | 2702 | } |
8a8bfbe7 | 2703 | } |
2704 | ||
fb39ff6e | 2705 | /* Similar, but do it via assembler directives instead. */ |
2706 | ||
2707 | static void | |
2708 | output_cfi_directive (dw_cfi_ref cfi) | |
2709 | { | |
2710 | unsigned long r, r2; | |
2711 | ||
2712 | switch (cfi->dw_cfi_opc) | |
2713 | { | |
2714 | case DW_CFA_advance_loc: | |
2715 | case DW_CFA_advance_loc1: | |
2716 | case DW_CFA_advance_loc2: | |
2717 | case DW_CFA_advance_loc4: | |
2718 | case DW_CFA_MIPS_advance_loc8: | |
2719 | case DW_CFA_set_loc: | |
2720 | /* Should only be created by add_fde_cfi in a code path not | |
2721 | followed when emitting via directives. The assembler is | |
2722 | going to take care of this for us. */ | |
2723 | gcc_unreachable (); | |
2724 | ||
2725 | case DW_CFA_offset: | |
2726 | case DW_CFA_offset_extended: | |
2727 | case DW_CFA_offset_extended_sf: | |
2728 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, 0); | |
2729 | fprintf (asm_out_file, "\t.cfi_offset %lu, "HOST_WIDE_INT_PRINT_DEC"\n", | |
be30e9d9 | 2730 | r, cfi->dw_cfi_oprnd2.dw_cfi_offset); |
fb39ff6e | 2731 | break; |
2732 | ||
2733 | case DW_CFA_restore: | |
2734 | case DW_CFA_restore_extended: | |
2735 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, 0); | |
2736 | fprintf (asm_out_file, "\t.cfi_restore %lu\n", r); | |
2737 | break; | |
2738 | ||
2739 | case DW_CFA_undefined: | |
2740 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, 0); | |
2741 | fprintf (asm_out_file, "\t.cfi_undefined %lu\n", r); | |
2742 | break; | |
2743 | ||
2744 | case DW_CFA_same_value: | |
2745 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, 0); | |
2746 | fprintf (asm_out_file, "\t.cfi_same_value %lu\n", r); | |
2747 | break; | |
2748 | ||
2749 | case DW_CFA_def_cfa: | |
2750 | case DW_CFA_def_cfa_sf: | |
2751 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, 0); | |
2752 | fprintf (asm_out_file, "\t.cfi_def_cfa %lu, "HOST_WIDE_INT_PRINT_DEC"\n", | |
2753 | r, cfi->dw_cfi_oprnd2.dw_cfi_offset); | |
2754 | break; | |
2755 | ||
2756 | case DW_CFA_def_cfa_register: | |
2757 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, 0); | |
2758 | fprintf (asm_out_file, "\t.cfi_def_cfa_register %lu\n", r); | |
2759 | break; | |
2760 | ||
2761 | case DW_CFA_register: | |
2762 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, 0); | |
2763 | r2 = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd2.dw_cfi_reg_num, 0); | |
2764 | fprintf (asm_out_file, "\t.cfi_register %lu, %lu\n", r, r2); | |
2765 | break; | |
2766 | ||
2767 | case DW_CFA_def_cfa_offset: | |
2768 | case DW_CFA_def_cfa_offset_sf: | |
2769 | fprintf (asm_out_file, "\t.cfi_def_cfa_offset " | |
2770 | HOST_WIDE_INT_PRINT_DEC"\n", | |
2771 | cfi->dw_cfi_oprnd1.dw_cfi_offset); | |
2772 | break; | |
2773 | ||
2774 | case DW_CFA_GNU_args_size: | |
2775 | fprintf (asm_out_file, "\t.cfi_escape 0x%x,", DW_CFA_GNU_args_size); | |
2776 | dw2_asm_output_data_uleb128_raw (cfi->dw_cfi_oprnd1.dw_cfi_offset); | |
2777 | if (flag_debug_asm) | |
2778 | fprintf (asm_out_file, "\t%s args_size "HOST_WIDE_INT_PRINT_DEC, | |
2779 | ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_offset); | |
2780 | fputc ('\n', asm_out_file); | |
2781 | break; | |
2782 | ||
2783 | case DW_CFA_GNU_window_save: | |
2784 | fprintf (asm_out_file, "\t.cfi_window_save\n"); | |
2785 | break; | |
2786 | ||
2787 | case DW_CFA_def_cfa_expression: | |
2788 | case DW_CFA_expression: | |
2789 | fprintf (asm_out_file, "\t.cfi_escape 0x%x,", cfi->dw_cfi_opc); | |
2790 | output_cfa_loc_raw (cfi); | |
2791 | fputc ('\n', asm_out_file); | |
2792 | break; | |
2793 | ||
2794 | default: | |
2795 | gcc_unreachable (); | |
2796 | } | |
2797 | } | |
2798 | ||
4eeb8b5d | 2799 | /* Output the call frame information used to record information |
8a8bfbe7 | 2800 | that relates to calculating the frame pointer, and records the |
2801 | location of saved registers. */ | |
2802 | ||
2803 | static void | |
8ec3a57b | 2804 | output_call_frame_info (int for_eh) |
8a8bfbe7 | 2805 | { |
19cb6b50 | 2806 | unsigned int i; |
2807 | dw_fde_ref fde; | |
2808 | dw_cfi_ref cfi; | |
48ead6eb | 2809 | char l1[20], l2[20], section_start_label[20]; |
f7b10771 | 2810 | bool any_lsda_needed = false; |
df4b504c | 2811 | char augmentation[6]; |
9b84bf7d | 2812 | int augmentation_size; |
2813 | int fde_encoding = DW_EH_PE_absptr; | |
2814 | int per_encoding = DW_EH_PE_absptr; | |
2815 | int lsda_encoding = DW_EH_PE_absptr; | |
51ea5d02 | 2816 | int return_reg; |
8a8bfbe7 | 2817 | |
637d3308 | 2818 | /* Don't emit a CIE if there won't be any FDEs. */ |
2819 | if (fde_table_in_use == 0) | |
2820 | return; | |
2821 | ||
fb39ff6e | 2822 | /* Nothing to do if the assembler's doing it all. */ |
3dcd5df1 | 2823 | if (dwarf2out_do_cfi_asm ()) |
fb39ff6e | 2824 | return; |
2825 | ||
2f9fc8ef | 2826 | /* If we make FDEs linkonce, we may have to emit an empty label for |
2827 | an FDE that wouldn't otherwise be emitted. We want to avoid | |
2828 | having an FDE kept around when the function it refers to is | |
1dc74225 | 2829 | discarded. Example where this matters: a primary function |
2f9fc8ef | 2830 | template in C++ requires EH information, but an explicit |
0bed3869 | 2831 | specialization doesn't. */ |
2f9fc8ef | 2832 | if (TARGET_USES_WEAK_UNWIND_INFO |
2833 | && ! flag_asynchronous_unwind_tables | |
e8f535c2 | 2834 | && flag_exceptions |
2f9fc8ef | 2835 | && for_eh) |
2836 | for (i = 0; i < fde_table_in_use; i++) | |
2837 | if ((fde_table[i].nothrow || fde_table[i].all_throwers_are_sibcalls) | |
61a9389f | 2838 | && !fde_table[i].uses_eh_lsda |
1dc74225 | 2839 | && ! DECL_WEAK (fde_table[i].decl)) |
883b2e73 | 2840 | targetm.asm_out.unwind_label (asm_out_file, fde_table[i].decl, |
ef1074f7 | 2841 | for_eh, /* empty */ 1); |
2f9fc8ef | 2842 | |
f7b10771 | 2843 | /* If we don't have any functions we'll want to unwind out of, don't |
2844 | emit any EH unwind information. Note that if exceptions aren't | |
2845 | enabled, we won't have collected nothrow information, and if we | |
2846 | asked for asynchronous tables, we always want this info. */ | |
f543a963 | 2847 | if (for_eh) |
2848 | { | |
f7b10771 | 2849 | bool any_eh_needed = !flag_exceptions || flag_asynchronous_unwind_tables; |
8c3f468d | 2850 | |
2851 | for (i = 0; i < fde_table_in_use; i++) | |
df4b504c | 2852 | if (fde_table[i].uses_eh_lsda) |
f7b10771 | 2853 | any_eh_needed = any_lsda_needed = true; |
61a9389f | 2854 | else if (TARGET_USES_WEAK_UNWIND_INFO && DECL_WEAK (fde_table[i].decl)) |
3ff2e849 | 2855 | any_eh_needed = true; |
d744d41d | 2856 | else if (! fde_table[i].nothrow |
2857 | && ! fde_table[i].all_throwers_are_sibcalls) | |
f7b10771 | 2858 | any_eh_needed = true; |
df4b504c | 2859 | |
2860 | if (! any_eh_needed) | |
2861 | return; | |
f543a963 | 2862 | } |
2863 | ||
009a56ab | 2864 | /* We're going to be generating comments, so turn on app. */ |
2865 | if (flag_debug_asm) | |
2866 | app_enable (); | |
ad87de1e | 2867 | |
8a8bfbe7 | 2868 | if (for_eh) |
2f14b1f9 | 2869 | switch_to_eh_frame_section (); |
8a8bfbe7 | 2870 | else |
4494ff1b | 2871 | { |
2872 | if (!debug_frame_section) | |
2873 | debug_frame_section = get_section (DEBUG_FRAME_SECTION, | |
2874 | SECTION_DEBUG, NULL); | |
2875 | switch_to_section (debug_frame_section); | |
2876 | } | |
8a8bfbe7 | 2877 | |
48ead6eb | 2878 | ASM_GENERATE_INTERNAL_LABEL (section_start_label, FRAME_BEGIN_LABEL, for_eh); |
2879 | ASM_OUTPUT_LABEL (asm_out_file, section_start_label); | |
2880 | ||
f80d1bcd | 2881 | /* Output the CIE. */ |
19bce576 | 2882 | ASM_GENERATE_INTERNAL_LABEL (l1, CIE_AFTER_SIZE_LABEL, for_eh); |
2883 | ASM_GENERATE_INTERNAL_LABEL (l2, CIE_END_LABEL, for_eh); | |
04da8de9 | 2884 | if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4 && !for_eh) |
2885 | dw2_asm_output_data (4, 0xffffffff, | |
2886 | "Initial length escape value indicating 64-bit DWARF extension"); | |
ca98eb0a | 2887 | dw2_asm_output_delta (for_eh ? 4 : DWARF_OFFSET_SIZE, l2, l1, |
2888 | "Length of Common Information Entry"); | |
19bce576 | 2889 | ASM_OUTPUT_LABEL (asm_out_file, l1); |
2890 | ||
ca98eb0a | 2891 | /* Now that the CIE pointer is PC-relative for EH, |
2892 | use 0 to identify the CIE. */ | |
2893 | dw2_asm_output_data ((for_eh ? 4 : DWARF_OFFSET_SIZE), | |
04da8de9 | 2894 | (for_eh ? 0 : DWARF_CIE_ID), |
ca98eb0a | 2895 | "CIE Identifier Tag"); |
8a8bfbe7 | 2896 | |
ca98eb0a | 2897 | dw2_asm_output_data (1, DW_CIE_VERSION, "CIE Version"); |
8a8bfbe7 | 2898 | |
df4b504c | 2899 | augmentation[0] = 0; |
9b84bf7d | 2900 | augmentation_size = 0; |
df4b504c | 2901 | if (for_eh) |
19bce576 | 2902 | { |
9b84bf7d | 2903 | char *p; |
2904 | ||
df4b504c | 2905 | /* Augmentation: |
2906 | z Indicates that a uleb128 is present to size the | |
8ec3a57b | 2907 | augmentation section. |
9b84bf7d | 2908 | L Indicates the encoding (and thus presence) of |
2909 | an LSDA pointer in the FDE augmentation. | |
2910 | R Indicates a non-default pointer encoding for | |
2911 | FDE code pointers. | |
2912 | P Indicates the presence of an encoding + language | |
2913 | personality routine in the CIE augmentation. */ | |
2914 | ||
3ff2e849 | 2915 | fde_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/1, /*global=*/0); |
9b84bf7d | 2916 | per_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/2, /*global=*/1); |
2917 | lsda_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/0, /*global=*/0); | |
2918 | ||
2919 | p = augmentation + 1; | |
2920 | if (eh_personality_libfunc) | |
2921 | { | |
2922 | *p++ = 'P'; | |
2923 | augmentation_size += 1 + size_of_encoded_value (per_encoding); | |
849ea31c | 2924 | assemble_external_libcall (eh_personality_libfunc); |
9b84bf7d | 2925 | } |
df4b504c | 2926 | if (any_lsda_needed) |
9b84bf7d | 2927 | { |
2928 | *p++ = 'L'; | |
2929 | augmentation_size += 1; | |
2930 | } | |
2931 | if (fde_encoding != DW_EH_PE_absptr) | |
2932 | { | |
2933 | *p++ = 'R'; | |
2934 | augmentation_size += 1; | |
2935 | } | |
2936 | if (p > augmentation + 1) | |
2937 | { | |
2938 | augmentation[0] = 'z'; | |
bc70bd5e | 2939 | *p = '\0'; |
9b84bf7d | 2940 | } |
9a4d22ba | 2941 | |
2942 | /* Ug. Some platforms can't do unaligned dynamic relocations at all. */ | |
2943 | if (eh_personality_libfunc && per_encoding == DW_EH_PE_aligned) | |
2944 | { | |
2945 | int offset = ( 4 /* Length */ | |
2946 | + 4 /* CIE Id */ | |
2947 | + 1 /* CIE version */ | |
2948 | + strlen (augmentation) + 1 /* Augmentation */ | |
2949 | + size_of_uleb128 (1) /* Code alignment */ | |
2950 | + size_of_sleb128 (DWARF_CIE_DATA_ALIGNMENT) | |
2951 | + 1 /* RA column */ | |
2952 | + 1 /* Augmentation size */ | |
2953 | + 1 /* Personality encoding */ ); | |
2954 | int pad = -offset & (PTR_SIZE - 1); | |
2955 | ||
2956 | augmentation_size += pad; | |
2957 | ||
2958 | /* Augmentations should be small, so there's scarce need to | |
2959 | iterate for a solution. Die if we exceed one uleb128 byte. */ | |
7bd4f6b6 | 2960 | gcc_assert (size_of_uleb128 (augmentation_size) == 1); |
9a4d22ba | 2961 | } |
19bce576 | 2962 | } |
8a8bfbe7 | 2963 | |
8c3f468d | 2964 | dw2_asm_output_nstring (augmentation, -1, "CIE Augmentation"); |
ca98eb0a | 2965 | dw2_asm_output_data_uleb128 (1, "CIE Code Alignment Factor"); |
ca98eb0a | 2966 | dw2_asm_output_data_sleb128 (DWARF_CIE_DATA_ALIGNMENT, |
2967 | "CIE Data Alignment Factor"); | |
ab569c0c | 2968 | |
51ea5d02 | 2969 | return_reg = DWARF2_FRAME_REG_OUT (DWARF_FRAME_RETURN_COLUMN, for_eh); |
ab569c0c | 2970 | if (DW_CIE_VERSION == 1) |
51ea5d02 | 2971 | dw2_asm_output_data (1, return_reg, "CIE RA Column"); |
ab569c0c | 2972 | else |
51ea5d02 | 2973 | dw2_asm_output_data_uleb128 (return_reg, "CIE RA Column"); |
8a8bfbe7 | 2974 | |
df4b504c | 2975 | if (augmentation[0]) |
2976 | { | |
9b84bf7d | 2977 | dw2_asm_output_data_uleb128 (augmentation_size, "Augmentation size"); |
df4b504c | 2978 | if (eh_personality_libfunc) |
9b84bf7d | 2979 | { |
2980 | dw2_asm_output_data (1, per_encoding, "Personality (%s)", | |
2981 | eh_data_format_name (per_encoding)); | |
2982 | dw2_asm_output_encoded_addr_rtx (per_encoding, | |
42e07529 | 2983 | eh_personality_libfunc, |
2984 | true, NULL); | |
9b84bf7d | 2985 | } |
8c3f468d | 2986 | |
9b84bf7d | 2987 | if (any_lsda_needed) |
2988 | dw2_asm_output_data (1, lsda_encoding, "LSDA Encoding (%s)", | |
2989 | eh_data_format_name (lsda_encoding)); | |
8c3f468d | 2990 | |
9b84bf7d | 2991 | if (fde_encoding != DW_EH_PE_absptr) |
2992 | dw2_asm_output_data (1, fde_encoding, "FDE Encoding (%s)", | |
2993 | eh_data_format_name (fde_encoding)); | |
df4b504c | 2994 | } |
2995 | ||
8a8bfbe7 | 2996 | for (cfi = cie_cfi_head; cfi != NULL; cfi = cfi->dw_cfi_next) |
b7020468 | 2997 | output_cfi (cfi, NULL, for_eh); |
8a8bfbe7 | 2998 | |
2999 | /* Pad the CIE out to an address sized boundary. */ | |
bc70bd5e | 3000 | ASM_OUTPUT_ALIGN (asm_out_file, |
b7020468 | 3001 | floor_log2 (for_eh ? PTR_SIZE : DWARF2_ADDR_SIZE)); |
19bce576 | 3002 | ASM_OUTPUT_LABEL (asm_out_file, l2); |
8a8bfbe7 | 3003 | |
3004 | /* Loop through all of the FDE's. */ | |
8c3f468d | 3005 | for (i = 0; i < fde_table_in_use; i++) |
8a8bfbe7 | 3006 | { |
3007 | fde = &fde_table[i]; | |
8a8bfbe7 | 3008 | |
df4b504c | 3009 | /* Don't emit EH unwind info for leaf functions that don't need it. */ |
f7b10771 | 3010 | if (for_eh && !flag_asynchronous_unwind_tables && flag_exceptions |
04396483 | 3011 | && (fde->nothrow || fde->all_throwers_are_sibcalls) |
1dc74225 | 3012 | && ! (TARGET_USES_WEAK_UNWIND_INFO && DECL_WEAK (fde_table[i].decl)) |
04396483 | 3013 | && !fde->uses_eh_lsda) |
f543a963 | 3014 | continue; |
3015 | ||
ef1074f7 | 3016 | targetm.asm_out.unwind_label (asm_out_file, fde->decl, for_eh, /* empty */ 0); |
883b2e73 | 3017 | targetm.asm_out.internal_label (asm_out_file, FDE_LABEL, for_eh + i * 2); |
f80d1bcd | 3018 | ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + i * 2); |
3019 | ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + i * 2); | |
04da8de9 | 3020 | if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4 && !for_eh) |
3021 | dw2_asm_output_data (4, 0xffffffff, | |
3022 | "Initial length escape value indicating 64-bit DWARF extension"); | |
ca98eb0a | 3023 | dw2_asm_output_delta (for_eh ? 4 : DWARF_OFFSET_SIZE, l2, l1, |
3024 | "FDE Length"); | |
19bce576 | 3025 | ASM_OUTPUT_LABEL (asm_out_file, l1); |
3026 | ||
8a8bfbe7 | 3027 | if (for_eh) |
48ead6eb | 3028 | dw2_asm_output_delta (4, l1, section_start_label, "FDE CIE offset"); |
8a8bfbe7 | 3029 | else |
48ead6eb | 3030 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, section_start_label, |
d08d29c0 | 3031 | debug_frame_section, "FDE CIE offset"); |
8a8bfbe7 | 3032 | |
9b84bf7d | 3033 | if (for_eh) |
3034 | { | |
1897b881 | 3035 | if (fde->dw_fde_switched_sections) |
3036 | { | |
61a9389f | 3037 | rtx sym_ref2 = gen_rtx_SYMBOL_REF (Pmode, |
1897b881 | 3038 | fde->dw_fde_unlikely_section_label); |
61a9389f | 3039 | rtx sym_ref3= gen_rtx_SYMBOL_REF (Pmode, |
1897b881 | 3040 | fde->dw_fde_hot_section_label); |
3041 | SYMBOL_REF_FLAGS (sym_ref2) |= SYMBOL_FLAG_LOCAL; | |
3042 | SYMBOL_REF_FLAGS (sym_ref3) |= SYMBOL_FLAG_LOCAL; | |
42e07529 | 3043 | dw2_asm_output_encoded_addr_rtx (fde_encoding, sym_ref3, false, |
1897b881 | 3044 | "FDE initial location"); |
3045 | dw2_asm_output_delta (size_of_encoded_value (fde_encoding), | |
3046 | fde->dw_fde_hot_section_end_label, | |
3047 | fde->dw_fde_hot_section_label, | |
3048 | "FDE address range"); | |
42e07529 | 3049 | dw2_asm_output_encoded_addr_rtx (fde_encoding, sym_ref2, false, |
1897b881 | 3050 | "FDE initial location"); |
3051 | dw2_asm_output_delta (size_of_encoded_value (fde_encoding), | |
3052 | fde->dw_fde_unlikely_section_end_label, | |
3053 | fde->dw_fde_unlikely_section_label, | |
3054 | "FDE address range"); | |
3055 | } | |
3056 | else | |
d848c04f | 3057 | { |
3058 | rtx sym_ref = gen_rtx_SYMBOL_REF (Pmode, fde->dw_fde_begin); | |
3059 | SYMBOL_REF_FLAGS (sym_ref) |= SYMBOL_FLAG_LOCAL; | |
3060 | dw2_asm_output_encoded_addr_rtx (fde_encoding, | |
3061 | sym_ref, | |
3062 | false, | |
3063 | "FDE initial location"); | |
3064 | dw2_asm_output_delta (size_of_encoded_value (fde_encoding), | |
3065 | fde->dw_fde_end, fde->dw_fde_begin, | |
3066 | "FDE address range"); | |
3067 | } | |
9b84bf7d | 3068 | } |
3069 | else | |
3070 | { | |
1897b881 | 3071 | if (fde->dw_fde_switched_sections) |
3072 | { | |
3073 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, | |
3074 | fde->dw_fde_hot_section_label, | |
3075 | "FDE initial location"); | |
3076 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, | |
3077 | fde->dw_fde_hot_section_end_label, | |
3078 | fde->dw_fde_hot_section_label, | |
3079 | "FDE address range"); | |
3080 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, | |
3081 | fde->dw_fde_unlikely_section_label, | |
3082 | "FDE initial location"); | |
61a9389f | 3083 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, |
1897b881 | 3084 | fde->dw_fde_unlikely_section_end_label, |
3085 | fde->dw_fde_unlikely_section_label, | |
3086 | "FDE address range"); | |
3087 | } | |
3088 | else | |
d848c04f | 3089 | { |
3090 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, fde->dw_fde_begin, | |
3091 | "FDE initial location"); | |
3092 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, | |
3093 | fde->dw_fde_end, fde->dw_fde_begin, | |
3094 | "FDE address range"); | |
3095 | } | |
9b84bf7d | 3096 | } |
8a8bfbe7 | 3097 | |
df4b504c | 3098 | if (augmentation[0]) |
3099 | { | |
9b84bf7d | 3100 | if (any_lsda_needed) |
df4b504c | 3101 | { |
9a4d22ba | 3102 | int size = size_of_encoded_value (lsda_encoding); |
3103 | ||
3104 | if (lsda_encoding == DW_EH_PE_aligned) | |
3105 | { | |
3106 | int offset = ( 4 /* Length */ | |
3107 | + 4 /* CIE offset */ | |
3108 | + 2 * size_of_encoded_value (fde_encoding) | |
3109 | + 1 /* Augmentation size */ ); | |
3110 | int pad = -offset & (PTR_SIZE - 1); | |
3111 | ||
3112 | size += pad; | |
7bd4f6b6 | 3113 | gcc_assert (size_of_uleb128 (size) == 1); |
9a4d22ba | 3114 | } |
3115 | ||
3116 | dw2_asm_output_data_uleb128 (size, "Augmentation size"); | |
9b84bf7d | 3117 | |
3118 | if (fde->uses_eh_lsda) | |
c83a163c | 3119 | { |
3120 | ASM_GENERATE_INTERNAL_LABEL (l1, "LLSDA", | |
9b84bf7d | 3121 | fde->funcdef_number); |
c83a163c | 3122 | dw2_asm_output_encoded_addr_rtx ( |
9b84bf7d | 3123 | lsda_encoding, gen_rtx_SYMBOL_REF (Pmode, l1), |
42e07529 | 3124 | false, "Language Specific Data Area"); |
c83a163c | 3125 | } |
9b84bf7d | 3126 | else |
9a4d22ba | 3127 | { |
3128 | if (lsda_encoding == DW_EH_PE_aligned) | |
3129 | ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE)); | |
8c3f468d | 3130 | dw2_asm_output_data |
3131 | (size_of_encoded_value (lsda_encoding), 0, | |
3132 | "Language Specific Data Area (none)"); | |
9a4d22ba | 3133 | } |
df4b504c | 3134 | } |
3135 | else | |
9b84bf7d | 3136 | dw2_asm_output_data_uleb128 (0, "Augmentation size"); |
df4b504c | 3137 | } |
3138 | ||
8a8bfbe7 | 3139 | /* Loop through the Call Frame Instructions associated with |
3140 | this FDE. */ | |
3141 | fde->dw_fde_current_label = fde->dw_fde_begin; | |
3142 | for (cfi = fde->dw_fde_cfi; cfi != NULL; cfi = cfi->dw_cfi_next) | |
b7020468 | 3143 | output_cfi (cfi, fde, for_eh); |
8a8bfbe7 | 3144 | |
19bce576 | 3145 | /* Pad the FDE out to an address sized boundary. */ |
bc70bd5e | 3146 | ASM_OUTPUT_ALIGN (asm_out_file, |
c83a163c | 3147 | floor_log2 ((for_eh ? PTR_SIZE : DWARF2_ADDR_SIZE))); |
19bce576 | 3148 | ASM_OUTPUT_LABEL (asm_out_file, l2); |
8a8bfbe7 | 3149 | } |
ca98eb0a | 3150 | |
a08b74c8 | 3151 | if (for_eh && targetm.terminate_dw2_eh_frame_info) |
ca98eb0a | 3152 | dw2_asm_output_data (4, 0, "End of Table"); |
19bce576 | 3153 | #ifdef MIPS_DEBUGGING_INFO |
3154 | /* Work around Irix 6 assembler bug whereby labels at the end of a section | |
3155 | get a value of 0. Putting .align 0 after the label fixes it. */ | |
3156 | ASM_OUTPUT_ALIGN (asm_out_file, 0); | |
3157 | #endif | |
009a56ab | 3158 | |
3159 | /* Turn off app to make assembly quicker. */ | |
3160 | if (flag_debug_asm) | |
3161 | app_disable (); | |
19bce576 | 3162 | } |
3163 | ||
8a8bfbe7 | 3164 | /* Output a marker (i.e. a label) for the beginning of a function, before |
3165 | the prologue. */ | |
3166 | ||
3167 | void | |
8ec3a57b | 3168 | dwarf2out_begin_prologue (unsigned int line ATTRIBUTE_UNUSED, |
3169 | const char *file ATTRIBUTE_UNUSED) | |
8a8bfbe7 | 3170 | { |
3171 | char label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
2d754264 | 3172 | char * dup_label; |
19cb6b50 | 3173 | dw_fde_ref fde; |
8a8bfbe7 | 3174 | |
2d754264 | 3175 | current_function_func_begin_label = NULL; |
ad5818ae | 3176 | |
8ec87476 | 3177 | #ifdef TARGET_UNWIND_INFO |
ad5818ae | 3178 | /* ??? current_function_func_begin_label is also used by except.c |
3179 | for call-site information. We must emit this label if it might | |
3180 | be used. */ | |
3181 | if ((! flag_exceptions || USING_SJLJ_EXCEPTIONS) | |
3182 | && ! dwarf2out_do_frame ()) | |
3183 | return; | |
3184 | #else | |
3185 | if (! dwarf2out_do_frame ()) | |
3186 | return; | |
3187 | #endif | |
3188 | ||
2f14b1f9 | 3189 | switch_to_section (function_section (current_function_decl)); |
8a8bfbe7 | 3190 | ASM_GENERATE_INTERNAL_LABEL (label, FUNC_BEGIN_LABEL, |
4781f9b9 | 3191 | current_function_funcdef_no); |
ad5818ae | 3192 | ASM_OUTPUT_DEBUG_LABEL (asm_out_file, FUNC_BEGIN_LABEL, |
4781f9b9 | 3193 | current_function_funcdef_no); |
2d754264 | 3194 | dup_label = xstrdup (label); |
3195 | current_function_func_begin_label = dup_label; | |
8a8bfbe7 | 3196 | |
8ec87476 | 3197 | #ifdef TARGET_UNWIND_INFO |
ad5818ae | 3198 | /* We can elide the fde allocation if we're not emitting debug info. */ |
3199 | if (! dwarf2out_do_frame ()) | |
3200 | return; | |
3201 | #endif | |
3202 | ||
8a8bfbe7 | 3203 | /* Expand the fde table if necessary. */ |
3204 | if (fde_table_in_use == fde_table_allocated) | |
3205 | { | |
3206 | fde_table_allocated += FDE_TABLE_INCREMENT; | |
2457c754 | 3207 | fde_table = GGC_RESIZEVEC (dw_fde_node, fde_table, fde_table_allocated); |
573aba85 | 3208 | memset (fde_table + fde_table_in_use, 0, |
3209 | FDE_TABLE_INCREMENT * sizeof (dw_fde_node)); | |
30ade641 | 3210 | } |
8a8bfbe7 | 3211 | |
3212 | /* Record the FDE associated with this function. */ | |
3213 | current_funcdef_fde = fde_table_in_use; | |
3214 | ||
3215 | /* Add the new FDE at the end of the fde_table. */ | |
3216 | fde = &fde_table[fde_table_in_use++]; | |
2f9fc8ef | 3217 | fde->decl = current_function_decl; |
2d754264 | 3218 | fde->dw_fde_begin = dup_label; |
3036ecbe | 3219 | fde->dw_fde_current_label = dup_label; |
1897b881 | 3220 | fde->dw_fde_hot_section_label = NULL; |
3221 | fde->dw_fde_hot_section_end_label = NULL; | |
3222 | fde->dw_fde_unlikely_section_label = NULL; | |
3223 | fde->dw_fde_unlikely_section_end_label = NULL; | |
3224 | fde->dw_fde_switched_sections = false; | |
8a8bfbe7 | 3225 | fde->dw_fde_end = NULL; |
3226 | fde->dw_fde_cfi = NULL; | |
4781f9b9 | 3227 | fde->funcdef_number = current_function_funcdef_no; |
b0d29d1c | 3228 | fde->nothrow = crtl->nothrow; |
18d50ae6 | 3229 | fde->uses_eh_lsda = crtl->uses_eh_lsda; |
3230 | fde->all_throwers_are_sibcalls = crtl->all_throwers_are_sibcalls; | |
27a7a23a | 3231 | fde->drap_reg = INVALID_REGNUM; |
3232 | fde->vdrap_reg = INVALID_REGNUM; | |
f543a963 | 3233 | |
08532d4f | 3234 | args_size = old_args_size = 0; |
f76df888 | 3235 | |
8c3f468d | 3236 | /* We only want to output line number information for the genuine dwarf2 |
3237 | prologue case, not the eh frame case. */ | |
f76df888 | 3238 | #ifdef DWARF2_DEBUGGING_INFO |
3239 | if (file) | |
3240 | dwarf2out_source_line (line, file); | |
3241 | #endif | |
fb39ff6e | 3242 | |
3dcd5df1 | 3243 | if (dwarf2out_do_cfi_asm ()) |
fb39ff6e | 3244 | { |
3245 | int enc; | |
3246 | rtx ref; | |
3247 | ||
3248 | fprintf (asm_out_file, "\t.cfi_startproc\n"); | |
3249 | ||
3250 | if (eh_personality_libfunc) | |
3251 | { | |
3252 | enc = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/2, /*global=*/1); | |
3253 | ref = eh_personality_libfunc; | |
3254 | ||
3255 | /* ??? The GAS support isn't entirely consistent. We have to | |
3256 | handle indirect support ourselves, but PC-relative is done | |
3257 | in the assembler. Further, the assembler can't handle any | |
3258 | of the weirder relocation types. */ | |
3259 | if (enc & DW_EH_PE_indirect) | |
3260 | ref = dw2_force_const_mem (ref, true); | |
3261 | ||
3262 | fprintf (asm_out_file, "\t.cfi_personality 0x%x,", enc); | |
3263 | output_addr_const (asm_out_file, ref); | |
3264 | fputc ('\n', asm_out_file); | |
3265 | } | |
3266 | ||
3267 | if (crtl->uses_eh_lsda) | |
3268 | { | |
3269 | char lab[20]; | |
3270 | ||
3271 | enc = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/0, /*global=*/0); | |
3272 | ASM_GENERATE_INTERNAL_LABEL (lab, "LLSDA", | |
3273 | current_function_funcdef_no); | |
3274 | ref = gen_rtx_SYMBOL_REF (Pmode, lab); | |
3275 | SYMBOL_REF_FLAGS (ref) = SYMBOL_FLAG_LOCAL; | |
3276 | ||
3277 | if (enc & DW_EH_PE_indirect) | |
3278 | ref = dw2_force_const_mem (ref, true); | |
3279 | ||
3280 | fprintf (asm_out_file, "\t.cfi_lsda 0x%x,", enc); | |
3281 | output_addr_const (asm_out_file, ref); | |
3282 | fputc ('\n', asm_out_file); | |
3283 | } | |
3284 | } | |
8a8bfbe7 | 3285 | } |
3286 | ||
3287 | /* Output a marker (i.e. a label) for the absolute end of the generated code | |
3288 | for a function definition. This gets called *after* the epilogue code has | |
3289 | been generated. */ | |
3290 | ||
3291 | void | |
8ec3a57b | 3292 | dwarf2out_end_epilogue (unsigned int line ATTRIBUTE_UNUSED, |
3293 | const char *file ATTRIBUTE_UNUSED) | |
8a8bfbe7 | 3294 | { |
3295 | dw_fde_ref fde; | |
3296 | char label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
3297 | ||
3dcd5df1 | 3298 | if (dwarf2out_do_cfi_asm ()) |
fb39ff6e | 3299 | fprintf (asm_out_file, "\t.cfi_endproc\n"); |
3300 | ||
8a8bfbe7 | 3301 | /* Output a label to mark the endpoint of the code generated for this |
04641143 | 3302 | function. */ |
4781f9b9 | 3303 | ASM_GENERATE_INTERNAL_LABEL (label, FUNC_END_LABEL, |
3304 | current_function_funcdef_no); | |
8a8bfbe7 | 3305 | ASM_OUTPUT_LABEL (asm_out_file, label); |
c0fd44c1 | 3306 | fde = current_fde (); |
3307 | gcc_assert (fde != NULL); | |
8a8bfbe7 | 3308 | fde->dw_fde_end = xstrdup (label); |
8a8bfbe7 | 3309 | } |
3310 | ||
3311 | void | |
8ec3a57b | 3312 | dwarf2out_frame_init (void) |
8a8bfbe7 | 3313 | { |
3314 | /* Allocate the initial hunk of the fde_table. */ | |
2457c754 | 3315 | fde_table = GGC_CNEWVEC (dw_fde_node, FDE_TABLE_INCREMENT); |
8a8bfbe7 | 3316 | fde_table_allocated = FDE_TABLE_INCREMENT; |
3317 | fde_table_in_use = 0; | |
3318 | ||
3319 | /* Generate the CFA instructions common to all FDE's. Do it now for the | |
3320 | sake of lookup_cfa. */ | |
3321 | ||
56daab87 | 3322 | /* On entry, the Canonical Frame Address is at SP. */ |
3323 | dwarf2out_def_cfa (NULL, STACK_POINTER_REGNUM, INCOMING_FRAME_SP_OFFSET); | |
34986748 | 3324 | |
3325 | #ifdef DWARF2_UNWIND_INFO | |
20ebe75d | 3326 | if (DWARF2_UNWIND_INFO || DWARF2_FRAME_INFO) |
34986748 | 3327 | initial_return_save (INCOMING_RETURN_ADDR_RTX); |
8a8bfbe7 | 3328 | #endif |
3329 | } | |
3330 | ||
3331 | void | |
8ec3a57b | 3332 | dwarf2out_frame_finish (void) |
8a8bfbe7 | 3333 | { |
8a8bfbe7 | 3334 | /* Output call frame information. */ |
34986748 | 3335 | if (DWARF2_FRAME_INFO) |
8a8bfbe7 | 3336 | output_call_frame_info (0); |
8c3f468d | 3337 | |
a28008f5 | 3338 | #ifndef TARGET_UNWIND_INFO |
3339 | /* Output another copy for the unwinder. */ | |
6851a1fc | 3340 | if (! USING_SJLJ_EXCEPTIONS && (flag_unwind_tables || flag_exceptions)) |
8a8bfbe7 | 3341 | output_call_frame_info (1); |
a28008f5 | 3342 | #endif |
f80d1bcd | 3343 | } |
af30c139 | 3344 | |
3345 | /* Note that the current function section is being used for code. */ | |
3346 | ||
3347 | static void | |
3348 | dwarf2out_note_section_used (void) | |
3349 | { | |
3350 | section *sec = current_function_section (); | |
3351 | if (sec == text_section) | |
3352 | text_section_used = true; | |
3353 | else if (sec == cold_text_section) | |
3354 | cold_text_section_used = true; | |
3355 | } | |
3356 | ||
3357 | void | |
3358 | dwarf2out_switch_text_section (void) | |
3359 | { | |
c0fd44c1 | 3360 | dw_fde_ref fde = current_fde (); |
af30c139 | 3361 | |
c0fd44c1 | 3362 | gcc_assert (cfun && fde); |
af30c139 | 3363 | |
af30c139 | 3364 | fde->dw_fde_switched_sections = true; |
abe32cce | 3365 | fde->dw_fde_hot_section_label = crtl->subsections.hot_section_label; |
3366 | fde->dw_fde_hot_section_end_label = crtl->subsections.hot_section_end_label; | |
3367 | fde->dw_fde_unlikely_section_label = crtl->subsections.cold_section_label; | |
3368 | fde->dw_fde_unlikely_section_end_label = crtl->subsections.cold_section_end_label; | |
af30c139 | 3369 | have_multiple_function_sections = true; |
3370 | ||
3371 | /* Reset the current label on switching text sections, so that we | |
3372 | don't attempt to advance_loc4 between labels in different sections. */ | |
3373 | fde->dw_fde_current_label = NULL; | |
3374 | ||
4e971a07 | 3375 | /* There is no need to mark used sections when not debugging. */ |
3376 | if (cold_text_section != NULL) | |
3377 | dwarf2out_note_section_used (); | |
af30c139 | 3378 | } |
573aba85 | 3379 | #endif |
4b72e226 | 3380 | \f |
3381 | /* And now, the subset of the debugging information support code necessary | |
3382 | for emitting location expressions. */ | |
8a8bfbe7 | 3383 | |
69278c24 | 3384 | /* Data about a single source file. */ |
fb1e4f4a | 3385 | struct GTY(()) dwarf_file_data { |
69278c24 | 3386 | const char * filename; |
3387 | int emitted_number; | |
3388 | }; | |
3389 | ||
931e9893 | 3390 | /* We need some way to distinguish DW_OP_addr with a direct symbol |
3391 | relocation from DW_OP_addr with a dtp-relative symbol relocation. */ | |
3392 | #define INTERNAL_DW_OP_tls_addr (0x100 + DW_OP_addr) | |
3393 | ||
3394 | ||
4b72e226 | 3395 | typedef struct dw_val_struct *dw_val_ref; |
3396 | typedef struct die_struct *dw_die_ref; | |
c1fdef8e | 3397 | typedef const struct die_struct *const_dw_die_ref; |
4b72e226 | 3398 | typedef struct dw_loc_descr_struct *dw_loc_descr_ref; |
4c21a22f | 3399 | typedef struct dw_loc_list_struct *dw_loc_list_ref; |
8a8bfbe7 | 3400 | |
fb1e4f4a | 3401 | typedef struct GTY(()) deferred_locations_struct |
89f29a1b | 3402 | { |
3403 | tree variable; | |
3404 | dw_die_ref die; | |
3405 | } deferred_locations; | |
3406 | ||
3407 | DEF_VEC_O(deferred_locations); | |
3408 | DEF_VEC_ALLOC_O(deferred_locations,gc); | |
3409 | ||
3410 | static GTY(()) VEC(deferred_locations, gc) *deferred_locations_list; | |
3411 | ||
8a8bfbe7 | 3412 | /* Each DIE may have a series of attribute/value pairs. Values |
3413 | can take on several forms. The forms that are used in this | |
3414 | implementation are listed below. */ | |
3415 | ||
573aba85 | 3416 | enum dw_val_class |
8a8bfbe7 | 3417 | { |
3418 | dw_val_class_addr, | |
a36145ca | 3419 | dw_val_class_offset, |
8a8bfbe7 | 3420 | dw_val_class_loc, |
4c21a22f | 3421 | dw_val_class_loc_list, |
fe39c28c | 3422 | dw_val_class_range_list, |
8a8bfbe7 | 3423 | dw_val_class_const, |
3424 | dw_val_class_unsigned_const, | |
3425 | dw_val_class_long_long, | |
1b6ad376 | 3426 | dw_val_class_vec, |
8a8bfbe7 | 3427 | dw_val_class_flag, |
3428 | dw_val_class_die_ref, | |
3429 | dw_val_class_fde_ref, | |
3430 | dw_val_class_lbl_id, | |
d08d29c0 | 3431 | dw_val_class_lineptr, |
3432 | dw_val_class_str, | |
69278c24 | 3433 | dw_val_class_macptr, |
3434 | dw_val_class_file | |
573aba85 | 3435 | }; |
30ade641 | 3436 | |
8a8bfbe7 | 3437 | /* Describe a double word constant value. */ |
0a44b200 | 3438 | /* ??? Every instance of long_long in the code really means CONST_DOUBLE. */ |
8a8bfbe7 | 3439 | |
fb1e4f4a | 3440 | typedef struct GTY(()) dw_long_long_struct { |
8a8bfbe7 | 3441 | unsigned long hi; |
3442 | unsigned long low; | |
3443 | } | |
3444 | dw_long_long_const; | |
3445 | ||
1b6ad376 | 3446 | /* Describe a floating point constant value, or a vector constant value. */ |
8a8bfbe7 | 3447 | |
fb1e4f4a | 3448 | typedef struct GTY(()) dw_vec_struct { |
1b6ad376 | 3449 | unsigned char * GTY((length ("%h.length"))) array; |
8a8bfbe7 | 3450 | unsigned length; |
1b6ad376 | 3451 | unsigned elt_size; |
8a8bfbe7 | 3452 | } |
1b6ad376 | 3453 | dw_vec_const; |
8a8bfbe7 | 3454 | |
ad87de1e | 3455 | /* The dw_val_node describes an attribute's value, as it is |
8a8bfbe7 | 3456 | represented internally. */ |
3457 | ||
fb1e4f4a | 3458 | typedef struct GTY(()) dw_val_struct { |
573aba85 | 3459 | enum dw_val_class val_class; |
3460 | union dw_val_struct_union | |
30ade641 | 3461 | { |
573aba85 | 3462 | rtx GTY ((tag ("dw_val_class_addr"))) val_addr; |
3d867824 | 3463 | unsigned HOST_WIDE_INT GTY ((tag ("dw_val_class_offset"))) val_offset; |
573aba85 | 3464 | dw_loc_list_ref GTY ((tag ("dw_val_class_loc_list"))) val_loc_list; |
3465 | dw_loc_descr_ref GTY ((tag ("dw_val_class_loc"))) val_loc; | |
7035b2ab | 3466 | HOST_WIDE_INT GTY ((default)) val_int; |
3d867824 | 3467 | unsigned HOST_WIDE_INT GTY ((tag ("dw_val_class_unsigned_const"))) val_unsigned; |
573aba85 | 3468 | dw_long_long_const GTY ((tag ("dw_val_class_long_long"))) val_long_long; |
1b6ad376 | 3469 | dw_vec_const GTY ((tag ("dw_val_class_vec"))) val_vec; |
573aba85 | 3470 | struct dw_val_die_union |
8c3f468d | 3471 | { |
3472 | dw_die_ref die; | |
3473 | int external; | |
573aba85 | 3474 | } GTY ((tag ("dw_val_class_die_ref"))) val_die_ref; |
3475 | unsigned GTY ((tag ("dw_val_class_fde_ref"))) val_fde_index; | |
3476 | struct indirect_string_node * GTY ((tag ("dw_val_class_str"))) val_str; | |
3477 | char * GTY ((tag ("dw_val_class_lbl_id"))) val_lbl_id; | |
3478 | unsigned char GTY ((tag ("dw_val_class_flag"))) val_flag; | |
69278c24 | 3479 | struct dwarf_file_data * GTY ((tag ("dw_val_class_file"))) val_file; |
30ade641 | 3480 | } |
573aba85 | 3481 | GTY ((desc ("%1.val_class"))) v; |
8a8bfbe7 | 3482 | } |
3483 | dw_val_node; | |
3484 | ||
3485 | /* Locations in memory are described using a sequence of stack machine | |
3486 | operations. */ | |
3487 | ||
fb1e4f4a | 3488 | typedef struct GTY(()) dw_loc_descr_struct { |
8a8bfbe7 | 3489 | dw_loc_descr_ref dw_loc_next; |
3490 | enum dwarf_location_atom dw_loc_opc; | |
9fac1c66 | 3491 | int dw_loc_addr; |
8a8bfbe7 | 3492 | dw_val_node dw_loc_oprnd1; |
3493 | dw_val_node dw_loc_oprnd2; | |
3494 | } | |
3495 | dw_loc_descr_node; | |
3496 | ||
4c21a22f | 3497 | /* Location lists are ranges + location descriptions for that range, |
3498 | so you can track variables that are in different places over | |
6312a35e | 3499 | their entire life. */ |
fb1e4f4a | 3500 | typedef struct GTY(()) dw_loc_list_struct { |
4c21a22f | 3501 | dw_loc_list_ref dw_loc_next; |
3502 | const char *begin; /* Label for begin address of range */ | |
3503 | const char *end; /* Label for end address of range */ | |
8c3f468d | 3504 | char *ll_symbol; /* Label for beginning of location list. |
3505 | Only on head of list */ | |
4c21a22f | 3506 | const char *section; /* Section this loclist is relative to */ |
3507 | dw_loc_descr_ref expr; | |
3508 | } dw_loc_list_node; | |
3509 | ||
573aba85 | 3510 | #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO) |
3511 | ||
27a7a23a | 3512 | static dw_loc_descr_ref int_loc_descriptor (HOST_WIDE_INT); |
8a8bfbe7 | 3513 | |
4b72e226 | 3514 | /* Convert a DWARF stack opcode into its string name. */ |
8a8bfbe7 | 3515 | |
4b72e226 | 3516 | static const char * |
8ec3a57b | 3517 | dwarf_stack_op_name (unsigned int op) |
678d90bb | 3518 | { |
4b72e226 | 3519 | switch (op) |
3520 | { | |
3521 | case DW_OP_addr: | |
931e9893 | 3522 | case INTERNAL_DW_OP_tls_addr: |
4b72e226 | 3523 | return "DW_OP_addr"; |
3524 | case DW_OP_deref: | |
3525 | return "DW_OP_deref"; | |
3526 | case DW_OP_const1u: | |
3527 | return "DW_OP_const1u"; | |
3528 | case DW_OP_const1s: | |
3529 | return "DW_OP_const1s"; | |
3530 | case DW_OP_const2u: | |
3531 | return "DW_OP_const2u"; | |
3532 | case DW_OP_const2s: | |
3533 | return "DW_OP_const2s"; | |
3534 | case DW_OP_const4u: | |
3535 | return "DW_OP_const4u"; | |
3536 | case DW_OP_const4s: | |
3537 | return "DW_OP_const4s"; | |
3538 | case DW_OP_const8u: | |
3539 | return "DW_OP_const8u"; | |
3540 | case DW_OP_const8s: | |
3541 | return "DW_OP_const8s"; | |
3542 | case DW_OP_constu: | |
3543 | return "DW_OP_constu"; | |
3544 | case DW_OP_consts: | |
3545 | return "DW_OP_consts"; | |
3546 | case DW_OP_dup: | |
3547 | return "DW_OP_dup"; | |
3548 | case DW_OP_drop: | |
3549 | return "DW_OP_drop"; | |
3550 | case DW_OP_over: | |
3551 | return "DW_OP_over"; | |
3552 | case DW_OP_pick: | |
3553 | return "DW_OP_pick"; | |
3554 | case DW_OP_swap: | |
3555 | return "DW_OP_swap"; | |
3556 | case DW_OP_rot: | |
3557 | return "DW_OP_rot"; | |
3558 | case DW_OP_xderef: | |
3559 | return "DW_OP_xderef"; | |
3560 | case DW_OP_abs: | |
3561 | return "DW_OP_abs"; | |
3562 | case DW_OP_and: | |
3563 | return "DW_OP_and"; | |
3564 | case DW_OP_div: | |
3565 | return "DW_OP_div"; | |
3566 | case DW_OP_minus: | |
3567 | return "DW_OP_minus"; | |
3568 | case DW_OP_mod: | |
3569 | return "DW_OP_mod"; | |
3570 | case DW_OP_mul: | |
3571 | return "DW_OP_mul"; | |
3572 | case DW_OP_neg: | |
3573 | return "DW_OP_neg"; | |
3574 | case DW_OP_not: | |
3575 | return "DW_OP_not"; | |
3576 | case DW_OP_or: | |
3577 | return "DW_OP_or"; | |
3578 | case DW_OP_plus: | |
3579 | return "DW_OP_plus"; | |
3580 | case DW_OP_plus_uconst: | |
3581 | return "DW_OP_plus_uconst"; | |
3582 | case DW_OP_shl: | |
3583 | return "DW_OP_shl"; | |
3584 | case DW_OP_shr: | |
3585 | return "DW_OP_shr"; | |
3586 | case DW_OP_shra: | |
3587 | return "DW_OP_shra"; | |
3588 | case DW_OP_xor: | |
3589 | return "DW_OP_xor"; | |
3590 | case DW_OP_bra: | |
3591 | return "DW_OP_bra"; | |
3592 | case DW_OP_eq: | |
3593 | return "DW_OP_eq"; | |
3594 | case DW_OP_ge: | |
3595 | return "DW_OP_ge"; | |
3596 | case DW_OP_gt: | |
3597 | return "DW_OP_gt"; | |
3598 | case DW_OP_le: | |
3599 | return "DW_OP_le"; | |
3600 | case DW_OP_lt: | |
3601 | return "DW_OP_lt"; | |
3602 | case DW_OP_ne: | |
3603 | return "DW_OP_ne"; | |
3604 | case DW_OP_skip: | |
3605 | return "DW_OP_skip"; | |
3606 | case DW_OP_lit0: | |
3607 | return "DW_OP_lit0"; | |
3608 | case DW_OP_lit1: | |
3609 | return "DW_OP_lit1"; | |
3610 | case DW_OP_lit2: | |
3611 | return "DW_OP_lit2"; | |
3612 | case DW_OP_lit3: | |
3613 | return "DW_OP_lit3"; | |
3614 | case DW_OP_lit4: | |
3615 | return "DW_OP_lit4"; | |
3616 | case DW_OP_lit5: | |
3617 | return "DW_OP_lit5"; | |
3618 | case DW_OP_lit6: | |
3619 | return "DW_OP_lit6"; | |
3620 | case DW_OP_lit7: | |
3621 | return "DW_OP_lit7"; | |
3622 | case DW_OP_lit8: | |
3623 | return "DW_OP_lit8"; | |
3624 | case DW_OP_lit9: | |
3625 | return "DW_OP_lit9"; | |
3626 | case DW_OP_lit10: | |
3627 | return "DW_OP_lit10"; | |
3628 | case DW_OP_lit11: | |
3629 | return "DW_OP_lit11"; | |
3630 | case DW_OP_lit12: | |
3631 | return "DW_OP_lit12"; | |
3632 | case DW_OP_lit13: | |
3633 | return "DW_OP_lit13"; | |
3634 | case DW_OP_lit14: | |
3635 | return "DW_OP_lit14"; | |
3636 | case DW_OP_lit15: | |
3637 | return "DW_OP_lit15"; | |
3638 | case DW_OP_lit16: | |
3639 | return "DW_OP_lit16"; | |
3640 | case DW_OP_lit17: | |
3641 | return "DW_OP_lit17"; | |
3642 | case DW_OP_lit18: | |
3643 | return "DW_OP_lit18"; | |
3644 | case DW_OP_lit19: | |
3645 | return "DW_OP_lit19"; | |
3646 | case DW_OP_lit20: | |
3647 | return "DW_OP_lit20"; | |
3648 | case DW_OP_lit21: | |
3649 | return "DW_OP_lit21"; | |
3650 | case DW_OP_lit22: | |
3651 | return "DW_OP_lit22"; | |
3652 | case DW_OP_lit23: | |
3653 | return "DW_OP_lit23"; | |
3654 | case DW_OP_lit24: | |
3655 | return "DW_OP_lit24"; | |
3656 | case DW_OP_lit25: | |
3657 | return "DW_OP_lit25"; | |
3658 | case DW_OP_lit26: | |
3659 | return "DW_OP_lit26"; | |
3660 | case DW_OP_lit27: | |
3661 | return "DW_OP_lit27"; | |
3662 | case DW_OP_lit28: | |
3663 | return "DW_OP_lit28"; | |
3664 | case DW_OP_lit29: | |
3665 | return "DW_OP_lit29"; | |
3666 | case DW_OP_lit30: | |
3667 | return "DW_OP_lit30"; | |
3668 | case DW_OP_lit31: | |
3669 | return "DW_OP_lit31"; | |
3670 | case DW_OP_reg0: | |
3671 | return "DW_OP_reg0"; | |
3672 | case DW_OP_reg1: | |
3673 | return "DW_OP_reg1"; | |
3674 | case DW_OP_reg2: | |
3675 | return "DW_OP_reg2"; | |
3676 | case DW_OP_reg3: | |
3677 | return "DW_OP_reg3"; | |
3678 | case DW_OP_reg4: | |
3679 | return "DW_OP_reg4"; | |
3680 | case DW_OP_reg5: | |
3681 | return "DW_OP_reg5"; | |
3682 | case DW_OP_reg6: | |
3683 | return "DW_OP_reg6"; | |
3684 | case DW_OP_reg7: | |
3685 | return "DW_OP_reg7"; | |
3686 | case DW_OP_reg8: | |
3687 | return "DW_OP_reg8"; | |
3688 | case DW_OP_reg9: | |
3689 | return "DW_OP_reg9"; | |
3690 | case DW_OP_reg10: | |
3691 | return "DW_OP_reg10"; | |
3692 | case DW_OP_reg11: | |
3693 | return "DW_OP_reg11"; | |
3694 | case DW_OP_reg12: | |
3695 | return "DW_OP_reg12"; | |
3696 | case DW_OP_reg13: | |
3697 | return "DW_OP_reg13"; | |
3698 | case DW_OP_reg14: | |
3699 | return "DW_OP_reg14"; | |
3700 | case DW_OP_reg15: | |
3701 | return "DW_OP_reg15"; | |
3702 | case DW_OP_reg16: | |
3703 | return "DW_OP_reg16"; | |
3704 | case DW_OP_reg17: | |
3705 | return "DW_OP_reg17"; | |
3706 | case DW_OP_reg18: | |
3707 | return "DW_OP_reg18"; | |
3708 | case DW_OP_reg19: | |
3709 | return "DW_OP_reg19"; | |
3710 | case DW_OP_reg20: | |
3711 | return "DW_OP_reg20"; | |
3712 | case DW_OP_reg21: | |
3713 | return "DW_OP_reg21"; | |
3714 | case DW_OP_reg22: | |
3715 | return "DW_OP_reg22"; | |
3716 | case DW_OP_reg23: | |
3717 | return "DW_OP_reg23"; | |
3718 | case DW_OP_reg24: | |
3719 | return "DW_OP_reg24"; | |
3720 | case DW_OP_reg25: | |
3721 | return "DW_OP_reg25"; | |
3722 | case DW_OP_reg26: | |
3723 | return "DW_OP_reg26"; | |
3724 | case DW_OP_reg27: | |
3725 | return "DW_OP_reg27"; | |
3726 | case DW_OP_reg28: | |
3727 | return "DW_OP_reg28"; | |
3728 | case DW_OP_reg29: | |
3729 | return "DW_OP_reg29"; | |
3730 | case DW_OP_reg30: | |
3731 | return "DW_OP_reg30"; | |
3732 | case DW_OP_reg31: | |
3733 | return "DW_OP_reg31"; | |
3734 | case DW_OP_breg0: | |
3735 | return "DW_OP_breg0"; | |
3736 | case DW_OP_breg1: | |
3737 | return "DW_OP_breg1"; | |
3738 | case DW_OP_breg2: | |
3739 | return "DW_OP_breg2"; | |
3740 | case DW_OP_breg3: | |
3741 | return "DW_OP_breg3"; | |
3742 | case DW_OP_breg4: | |
3743 | return "DW_OP_breg4"; | |
3744 | case DW_OP_breg5: | |
3745 | return "DW_OP_breg5"; | |
3746 | case DW_OP_breg6: | |
3747 | return "DW_OP_breg6"; | |
3748 | case DW_OP_breg7: | |
3749 | return "DW_OP_breg7"; | |
3750 | case DW_OP_breg8: | |
3751 | return "DW_OP_breg8"; | |
3752 | case DW_OP_breg9: | |
3753 | return "DW_OP_breg9"; | |
3754 | case DW_OP_breg10: | |
3755 | return "DW_OP_breg10"; | |
3756 | case DW_OP_breg11: | |
3757 | return "DW_OP_breg11"; | |
3758 | case DW_OP_breg12: | |
3759 | return "DW_OP_breg12"; | |
3760 | case DW_OP_breg13: | |
3761 | return "DW_OP_breg13"; | |
3762 | case DW_OP_breg14: | |
3763 | return "DW_OP_breg14"; | |
3764 | case DW_OP_breg15: | |
3765 | return "DW_OP_breg15"; | |
3766 | case DW_OP_breg16: | |
3767 | return "DW_OP_breg16"; | |
3768 | case DW_OP_breg17: | |
3769 | return "DW_OP_breg17"; | |
3770 | case DW_OP_breg18: | |
3771 | return "DW_OP_breg18"; | |
3772 | case DW_OP_breg19: | |
3773 | return "DW_OP_breg19"; | |
3774 | case DW_OP_breg20: | |
3775 | return "DW_OP_breg20"; | |
3776 | case DW_OP_breg21: | |
3777 | return "DW_OP_breg21"; | |
3778 | case DW_OP_breg22: | |
3779 | return "DW_OP_breg22"; | |
3780 | case DW_OP_breg23: | |
3781 | return "DW_OP_breg23"; | |
3782 | case DW_OP_breg24: | |
3783 | return "DW_OP_breg24"; | |
3784 | case DW_OP_breg25: | |
3785 | return "DW_OP_breg25"; | |
3786 | case DW_OP_breg26: | |
3787 | return "DW_OP_breg26"; | |
3788 | case DW_OP_breg27: | |
3789 | return "DW_OP_breg27"; | |
3790 | case DW_OP_breg28: | |
3791 | return "DW_OP_breg28"; | |
3792 | case DW_OP_breg29: | |
3793 | return "DW_OP_breg29"; | |
3794 | case DW_OP_breg30: | |
3795 | return "DW_OP_breg30"; | |
3796 | case DW_OP_breg31: | |
3797 | return "DW_OP_breg31"; | |
3798 | case DW_OP_regx: | |
3799 | return "DW_OP_regx"; | |
3800 | case DW_OP_fbreg: | |
3801 | return "DW_OP_fbreg"; | |
3802 | case DW_OP_bregx: | |
3803 | return "DW_OP_bregx"; | |
3804 | case DW_OP_piece: | |
3805 | return "DW_OP_piece"; | |
3806 | case DW_OP_deref_size: | |
3807 | return "DW_OP_deref_size"; | |
3808 | case DW_OP_xderef_size: | |
3809 | return "DW_OP_xderef_size"; | |
3810 | case DW_OP_nop: | |
3811 | return "DW_OP_nop"; | |
931e9893 | 3812 | case DW_OP_push_object_address: |
3813 | return "DW_OP_push_object_address"; | |
3814 | case DW_OP_call2: | |
3815 | return "DW_OP_call2"; | |
3816 | case DW_OP_call4: | |
3817 | return "DW_OP_call4"; | |
3818 | case DW_OP_call_ref: | |
3819 | return "DW_OP_call_ref"; | |
3820 | case DW_OP_GNU_push_tls_address: | |
3821 | return "DW_OP_GNU_push_tls_address"; | |
d53bb226 | 3822 | case DW_OP_GNU_uninit: |
3823 | return "DW_OP_GNU_uninit"; | |
8a8bfbe7 | 3824 | default: |
4b72e226 | 3825 | return "OP_<unknown>"; |
8a8bfbe7 | 3826 | } |
6ed29fb8 | 3827 | } |
30ade641 | 3828 | |
4b72e226 | 3829 | /* Return a pointer to a newly allocated location description. Location |
3830 | descriptions are simple expression terms that can be strung | |
3831 | together to form more complicated location (address) descriptions. */ | |
3832 | ||
3833 | static inline dw_loc_descr_ref | |
3d867824 | 3834 | new_loc_descr (enum dwarf_location_atom op, unsigned HOST_WIDE_INT oprnd1, |
3835 | unsigned HOST_WIDE_INT oprnd2) | |
752e49ca | 3836 | { |
2457c754 | 3837 | dw_loc_descr_ref descr = GGC_CNEW (dw_loc_descr_node); |
ec1e49cc | 3838 | |
4b72e226 | 3839 | descr->dw_loc_opc = op; |
3840 | descr->dw_loc_oprnd1.val_class = dw_val_class_unsigned_const; | |
3841 | descr->dw_loc_oprnd1.v.val_unsigned = oprnd1; | |
3842 | descr->dw_loc_oprnd2.val_class = dw_val_class_unsigned_const; | |
3843 | descr->dw_loc_oprnd2.v.val_unsigned = oprnd2; | |
ec1e49cc | 3844 | |
4b72e226 | 3845 | return descr; |
3846 | } | |
3847 | ||
dde9bb3b | 3848 | /* Return a pointer to a newly allocated location description for |
3849 | REG and OFFSET. */ | |
3850 | ||
3851 | static inline dw_loc_descr_ref | |
3852 | new_reg_loc_descr (unsigned int reg, unsigned HOST_WIDE_INT offset) | |
3853 | { | |
3854 | if (offset) | |
3855 | { | |
3856 | if (reg <= 31) | |
b9c74b4d | 3857 | return new_loc_descr ((enum dwarf_location_atom) (DW_OP_breg0 + reg), |
3858 | offset, 0); | |
dde9bb3b | 3859 | else |
3860 | return new_loc_descr (DW_OP_bregx, reg, offset); | |
3861 | } | |
3862 | else if (reg <= 31) | |
b9c74b4d | 3863 | return new_loc_descr ((enum dwarf_location_atom) (DW_OP_reg0 + reg), 0, 0); |
dde9bb3b | 3864 | else |
3865 | return new_loc_descr (DW_OP_regx, reg, 0); | |
3866 | } | |
3867 | ||
4b72e226 | 3868 | /* Add a location description term to a location description expression. */ |
3869 | ||
3870 | static inline void | |
8ec3a57b | 3871 | add_loc_descr (dw_loc_descr_ref *list_head, dw_loc_descr_ref descr) |
4b72e226 | 3872 | { |
19cb6b50 | 3873 | dw_loc_descr_ref *d; |
4b72e226 | 3874 | |
3875 | /* Find the end of the chain. */ | |
3876 | for (d = list_head; (*d) != NULL; d = &(*d)->dw_loc_next) | |
3877 | ; | |
3878 | ||
3879 | *d = descr; | |
3880 | } | |
3881 | ||
1938132c | 3882 | /* Add a constant OFFSET to a location expression. */ |
3883 | ||
3884 | static void | |
3885 | loc_descr_plus_const (dw_loc_descr_ref *list_head, HOST_WIDE_INT offset) | |
3886 | { | |
3887 | dw_loc_descr_ref loc; | |
3888 | HOST_WIDE_INT *p; | |
3889 | ||
3890 | gcc_assert (*list_head != NULL); | |
3891 | ||
3892 | if (!offset) | |
3893 | return; | |
3894 | ||
3895 | /* Find the end of the chain. */ | |
3896 | for (loc = *list_head; loc->dw_loc_next != NULL; loc = loc->dw_loc_next) | |
3897 | ; | |
3898 | ||
3899 | p = NULL; | |
3900 | if (loc->dw_loc_opc == DW_OP_fbreg | |
3901 | || (loc->dw_loc_opc >= DW_OP_breg0 && loc->dw_loc_opc <= DW_OP_breg31)) | |
3902 | p = &loc->dw_loc_oprnd1.v.val_int; | |
3903 | else if (loc->dw_loc_opc == DW_OP_bregx) | |
3904 | p = &loc->dw_loc_oprnd2.v.val_int; | |
3905 | ||
3906 | /* If the last operation is fbreg, breg{0..31,x}, optimize by adjusting its | |
3907 | offset. Don't optimize if an signed integer overflow would happen. */ | |
3908 | if (p != NULL | |
3909 | && ((offset > 0 && *p <= INTTYPE_MAXIMUM (HOST_WIDE_INT) - offset) | |
3910 | || (offset < 0 && *p >= INTTYPE_MINIMUM (HOST_WIDE_INT) - offset))) | |
3911 | *p += offset; | |
3912 | ||
3913 | else if (offset > 0) | |
3914 | loc->dw_loc_next = new_loc_descr (DW_OP_plus_uconst, offset, 0); | |
3915 | ||
3916 | else | |
3917 | { | |
3918 | loc->dw_loc_next = int_loc_descriptor (offset); | |
3919 | add_loc_descr (&loc->dw_loc_next, new_loc_descr (DW_OP_plus, 0, 0)); | |
3920 | } | |
3921 | } | |
3922 | ||
4b72e226 | 3923 | /* Return the size of a location descriptor. */ |
3924 | ||
3925 | static unsigned long | |
8ec3a57b | 3926 | size_of_loc_descr (dw_loc_descr_ref loc) |
4b72e226 | 3927 | { |
19cb6b50 | 3928 | unsigned long size = 1; |
4b72e226 | 3929 | |
3930 | switch (loc->dw_loc_opc) | |
3931 | { | |
3932 | case DW_OP_addr: | |
931e9893 | 3933 | case INTERNAL_DW_OP_tls_addr: |
4b72e226 | 3934 | size += DWARF2_ADDR_SIZE; |
3935 | break; | |
3936 | case DW_OP_const1u: | |
3937 | case DW_OP_const1s: | |
3938 | size += 1; | |
3939 | break; | |
3940 | case DW_OP_const2u: | |
3941 | case DW_OP_const2s: | |
3942 | size += 2; | |
3943 | break; | |
3944 | case DW_OP_const4u: | |
3945 | case DW_OP_const4s: | |
3946 | size += 4; | |
3947 | break; | |
3948 | case DW_OP_const8u: | |
3949 | case DW_OP_const8s: | |
3950 | size += 8; | |
3951 | break; | |
3952 | case DW_OP_constu: | |
3953 | size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned); | |
3954 | break; | |
3955 | case DW_OP_consts: | |
3956 | size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int); | |
3957 | break; | |
3958 | case DW_OP_pick: | |
3959 | size += 1; | |
3960 | break; | |
3961 | case DW_OP_plus_uconst: | |
3962 | size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned); | |
3963 | break; | |
3964 | case DW_OP_skip: | |
3965 | case DW_OP_bra: | |
3966 | size += 2; | |
3967 | break; | |
3968 | case DW_OP_breg0: | |
3969 | case DW_OP_breg1: | |
3970 | case DW_OP_breg2: | |
3971 | case DW_OP_breg3: | |
3972 | case DW_OP_breg4: | |
3973 | case DW_OP_breg5: | |
3974 | case DW_OP_breg6: | |
3975 | case DW_OP_breg7: | |
3976 | case DW_OP_breg8: | |
3977 | case DW_OP_breg9: | |
3978 | case DW_OP_breg10: | |
3979 | case DW_OP_breg11: | |
3980 | case DW_OP_breg12: | |
3981 | case DW_OP_breg13: | |
3982 | case DW_OP_breg14: | |
3983 | case DW_OP_breg15: | |
3984 | case DW_OP_breg16: | |
3985 | case DW_OP_breg17: | |
3986 | case DW_OP_breg18: | |
3987 | case DW_OP_breg19: | |
3988 | case DW_OP_breg20: | |
3989 | case DW_OP_breg21: | |
3990 | case DW_OP_breg22: | |
3991 | case DW_OP_breg23: | |
3992 | case DW_OP_breg24: | |
3993 | case DW_OP_breg25: | |
3994 | case DW_OP_breg26: | |
3995 | case DW_OP_breg27: | |
3996 | case DW_OP_breg28: | |
3997 | case DW_OP_breg29: | |
3998 | case DW_OP_breg30: | |
3999 | case DW_OP_breg31: | |
4000 | size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int); | |
4001 | break; | |
4002 | case DW_OP_regx: | |
4003 | size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned); | |
4004 | break; | |
4005 | case DW_OP_fbreg: | |
4006 | size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int); | |
4007 | break; | |
4008 | case DW_OP_bregx: | |
4009 | size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned); | |
4010 | size += size_of_sleb128 (loc->dw_loc_oprnd2.v.val_int); | |
4011 | break; | |
4012 | case DW_OP_piece: | |
4013 | size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned); | |
4014 | break; | |
4015 | case DW_OP_deref_size: | |
4016 | case DW_OP_xderef_size: | |
4017 | size += 1; | |
4018 | break; | |
931e9893 | 4019 | case DW_OP_call2: |
4020 | size += 2; | |
4021 | break; | |
4022 | case DW_OP_call4: | |
4023 | size += 4; | |
4024 | break; | |
4025 | case DW_OP_call_ref: | |
4026 | size += DWARF2_ADDR_SIZE; | |
4027 | break; | |
8a8bfbe7 | 4028 | default: |
4b72e226 | 4029 | break; |
752e49ca | 4030 | } |
4b72e226 | 4031 | |
4032 | return size; | |
752e49ca | 4033 | } |
4034 | ||
4b72e226 | 4035 | /* Return the size of a series of location descriptors. */ |
ec1e49cc | 4036 | |
4b72e226 | 4037 | static unsigned long |
8ec3a57b | 4038 | size_of_locs (dw_loc_descr_ref loc) |
752e49ca | 4039 | { |
2fa2456e | 4040 | dw_loc_descr_ref l; |
8c3f468d | 4041 | unsigned long size; |
4b72e226 | 4042 | |
2fa2456e | 4043 | /* If there are no skip or bra opcodes, don't fill in the dw_loc_addr |
4044 | field, to avoid writing to a PCH file. */ | |
4045 | for (size = 0, l = loc; l != NULL; l = l->dw_loc_next) | |
9ed904da | 4046 | { |
2fa2456e | 4047 | if (l->dw_loc_opc == DW_OP_skip || l->dw_loc_opc == DW_OP_bra) |
4048 | break; | |
4049 | size += size_of_loc_descr (l); | |
4050 | } | |
4051 | if (! l) | |
4052 | return size; | |
4053 | ||
4054 | for (size = 0, l = loc; l != NULL; l = l->dw_loc_next) | |
4055 | { | |
4056 | l->dw_loc_addr = size; | |
4057 | size += size_of_loc_descr (l); | |
9ed904da | 4058 | } |
4b72e226 | 4059 | |
4060 | return size; | |
752e49ca | 4061 | } |
4062 | ||
4b72e226 | 4063 | /* Output location description stack opcode's operands (if any). */ |
ec1e49cc | 4064 | |
4b72e226 | 4065 | static void |
8ec3a57b | 4066 | output_loc_operands (dw_loc_descr_ref loc) |
30ade641 | 4067 | { |
19cb6b50 | 4068 | dw_val_ref val1 = &loc->dw_loc_oprnd1; |
4069 | dw_val_ref val2 = &loc->dw_loc_oprnd2; | |
4b72e226 | 4070 | |
4071 | switch (loc->dw_loc_opc) | |
30ade641 | 4072 | { |
a6c3bce6 | 4073 | #ifdef DWARF2_DEBUGGING_INFO |
8a8bfbe7 | 4074 | case DW_OP_addr: |
ca98eb0a | 4075 | dw2_asm_output_addr_rtx (DWARF2_ADDR_SIZE, val1->v.val_addr, NULL); |
4b72e226 | 4076 | break; |
8a8bfbe7 | 4077 | case DW_OP_const2u: |
8a8bfbe7 | 4078 | case DW_OP_const2s: |
ca98eb0a | 4079 | dw2_asm_output_data (2, val1->v.val_int, NULL); |
4b72e226 | 4080 | break; |
8a8bfbe7 | 4081 | case DW_OP_const4u: |
8a8bfbe7 | 4082 | case DW_OP_const4s: |
ca98eb0a | 4083 | dw2_asm_output_data (4, val1->v.val_int, NULL); |
4b72e226 | 4084 | break; |
8a8bfbe7 | 4085 | case DW_OP_const8u: |
8a8bfbe7 | 4086 | case DW_OP_const8s: |
7bd4f6b6 | 4087 | gcc_assert (HOST_BITS_PER_LONG >= 64); |
ca98eb0a | 4088 | dw2_asm_output_data (8, val1->v.val_int, NULL); |
4b72e226 | 4089 | break; |
a6c3bce6 | 4090 | case DW_OP_skip: |
4091 | case DW_OP_bra: | |
9ed904da | 4092 | { |
4093 | int offset; | |
4094 | ||
7bd4f6b6 | 4095 | gcc_assert (val1->val_class == dw_val_class_loc); |
4096 | offset = val1->v.val_loc->dw_loc_addr - (loc->dw_loc_addr + 3); | |
9ed904da | 4097 | |
ca98eb0a | 4098 | dw2_asm_output_data (2, offset, NULL); |
9ed904da | 4099 | } |
a6c3bce6 | 4100 | break; |
ccd12125 | 4101 | #else |
4102 | case DW_OP_addr: | |
4103 | case DW_OP_const2u: | |
4104 | case DW_OP_const2s: | |
4105 | case DW_OP_const4u: | |
4106 | case DW_OP_const4s: | |
4107 | case DW_OP_const8u: | |
4108 | case DW_OP_const8s: | |
4109 | case DW_OP_skip: | |
4110 | case DW_OP_bra: | |
4111 | /* We currently don't make any attempt to make sure these are | |
c83a163c | 4112 | aligned properly like we do for the main unwind info, so |
4113 | don't support emitting things larger than a byte if we're | |
4114 | only doing unwinding. */ | |
7bd4f6b6 | 4115 | gcc_unreachable (); |
a6c3bce6 | 4116 | #endif |
4117 | case DW_OP_const1u: | |
4118 | case DW_OP_const1s: | |
ca98eb0a | 4119 | dw2_asm_output_data (1, val1->v.val_int, NULL); |
a6c3bce6 | 4120 | break; |
8a8bfbe7 | 4121 | case DW_OP_constu: |
ca98eb0a | 4122 | dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL); |
4b72e226 | 4123 | break; |
8a8bfbe7 | 4124 | case DW_OP_consts: |
ca98eb0a | 4125 | dw2_asm_output_data_sleb128 (val1->v.val_int, NULL); |
4b72e226 | 4126 | break; |
4127 | case DW_OP_pick: | |
ca98eb0a | 4128 | dw2_asm_output_data (1, val1->v.val_int, NULL); |
4b72e226 | 4129 | break; |
4130 | case DW_OP_plus_uconst: | |
ca98eb0a | 4131 | dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL); |
4b72e226 | 4132 | break; |
8a8bfbe7 | 4133 | case DW_OP_breg0: |
8a8bfbe7 | 4134 | case DW_OP_breg1: |
8a8bfbe7 | 4135 | case DW_OP_breg2: |
8a8bfbe7 | 4136 | case DW_OP_breg3: |
8a8bfbe7 | 4137 | case DW_OP_breg4: |
8a8bfbe7 | 4138 | case DW_OP_breg5: |
8a8bfbe7 | 4139 | case DW_OP_breg6: |
8a8bfbe7 | 4140 | case DW_OP_breg7: |
8a8bfbe7 | 4141 | case DW_OP_breg8: |
8a8bfbe7 | 4142 | case DW_OP_breg9: |
8a8bfbe7 | 4143 | case DW_OP_breg10: |
8a8bfbe7 | 4144 | case DW_OP_breg11: |
8a8bfbe7 | 4145 | case DW_OP_breg12: |
8a8bfbe7 | 4146 | case DW_OP_breg13: |
8a8bfbe7 | 4147 | case DW_OP_breg14: |
8a8bfbe7 | 4148 | case DW_OP_breg15: |
8a8bfbe7 | 4149 | case DW_OP_breg16: |
8a8bfbe7 | 4150 | case DW_OP_breg17: |
8a8bfbe7 | 4151 | case DW_OP_breg18: |
8a8bfbe7 | 4152 | case DW_OP_breg19: |
8a8bfbe7 | 4153 | case DW_OP_breg20: |
8a8bfbe7 | 4154 | case DW_OP_breg21: |
8a8bfbe7 | 4155 | case DW_OP_breg22: |
8a8bfbe7 | 4156 | case DW_OP_breg23: |
8a8bfbe7 | 4157 | case DW_OP_breg24: |
8a8bfbe7 | 4158 | case DW_OP_breg25: |
8a8bfbe7 | 4159 | case DW_OP_breg26: |
8a8bfbe7 | 4160 | case DW_OP_breg27: |
8a8bfbe7 | 4161 | case DW_OP_breg28: |
8a8bfbe7 | 4162 | case DW_OP_breg29: |
8a8bfbe7 | 4163 | case DW_OP_breg30: |
8a8bfbe7 | 4164 | case DW_OP_breg31: |
ca98eb0a | 4165 | dw2_asm_output_data_sleb128 (val1->v.val_int, NULL); |
4b72e226 | 4166 | break; |
8a8bfbe7 | 4167 | case DW_OP_regx: |
ca98eb0a | 4168 | dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL); |
4b72e226 | 4169 | break; |
8a8bfbe7 | 4170 | case DW_OP_fbreg: |
ca98eb0a | 4171 | dw2_asm_output_data_sleb128 (val1->v.val_int, NULL); |
4b72e226 | 4172 | break; |
8a8bfbe7 | 4173 | case DW_OP_bregx: |
ca98eb0a | 4174 | dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL); |
4175 | dw2_asm_output_data_sleb128 (val2->v.val_int, NULL); | |
4b72e226 | 4176 | break; |
8a8bfbe7 | 4177 | case DW_OP_piece: |
ca98eb0a | 4178 | dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL); |
4b72e226 | 4179 | break; |
8a8bfbe7 | 4180 | case DW_OP_deref_size: |
8a8bfbe7 | 4181 | case DW_OP_xderef_size: |
ca98eb0a | 4182 | dw2_asm_output_data (1, val1->v.val_int, NULL); |
4b72e226 | 4183 | break; |
931e9893 | 4184 | |
4185 | case INTERNAL_DW_OP_tls_addr: | |
40af64cc | 4186 | if (targetm.asm_out.output_dwarf_dtprel) |
4187 | { | |
4188 | targetm.asm_out.output_dwarf_dtprel (asm_out_file, | |
4189 | DWARF2_ADDR_SIZE, | |
4190 | val1->v.val_addr); | |
4191 | fputc ('\n', asm_out_file); | |
4192 | } | |
4193 | else | |
4194 | gcc_unreachable (); | |
931e9893 | 4195 | break; |
4196 | ||
4b72e226 | 4197 | default: |
ccd12125 | 4198 | /* Other codes have no operands. */ |
4199 | break; | |
4b72e226 | 4200 | } |
4201 | } | |
4202 | ||
4203 | /* Output a sequence of location operations. */ | |
4204 | ||
4205 | static void | |
8ec3a57b | 4206 | output_loc_sequence (dw_loc_descr_ref loc) |
4b72e226 | 4207 | { |
4208 | for (; loc != NULL; loc = loc->dw_loc_next) | |
4209 | { | |
4210 | /* Output the opcode. */ | |
ca98eb0a | 4211 | dw2_asm_output_data (1, loc->dw_loc_opc, |
4212 | "%s", dwarf_stack_op_name (loc->dw_loc_opc)); | |
4b72e226 | 4213 | |
4214 | /* Output the operand(s) (if any). */ | |
4215 | output_loc_operands (loc); | |
4216 | } | |
4217 | } | |
4218 | ||
fb39ff6e | 4219 | /* Output location description stack opcode's operands (if any). |
4220 | The output is single bytes on a line, suitable for .cfi_escape. */ | |
4221 | ||
4222 | static void | |
4223 | output_loc_operands_raw (dw_loc_descr_ref loc) | |
4224 | { | |
4225 | dw_val_ref val1 = &loc->dw_loc_oprnd1; | |
4226 | dw_val_ref val2 = &loc->dw_loc_oprnd2; | |
4227 | ||
4228 | switch (loc->dw_loc_opc) | |
4229 | { | |
4230 | case DW_OP_addr: | |
4231 | /* We cannot output addresses in .cfi_escape, only bytes. */ | |
4232 | gcc_unreachable (); | |
4233 | ||
4234 | case DW_OP_const1u: | |
4235 | case DW_OP_const1s: | |
4236 | case DW_OP_pick: | |
4237 | case DW_OP_deref_size: | |
4238 | case DW_OP_xderef_size: | |
4239 | fputc (',', asm_out_file); | |
4240 | dw2_asm_output_data_raw (1, val1->v.val_int); | |
4241 | break; | |
4242 | ||
4243 | case DW_OP_const2u: | |
4244 | case DW_OP_const2s: | |
4245 | fputc (',', asm_out_file); | |
4246 | dw2_asm_output_data_raw (2, val1->v.val_int); | |
4247 | break; | |
4248 | ||
4249 | case DW_OP_const4u: | |
4250 | case DW_OP_const4s: | |
4251 | fputc (',', asm_out_file); | |
4252 | dw2_asm_output_data_raw (4, val1->v.val_int); | |
4253 | break; | |
4254 | ||
4255 | case DW_OP_const8u: | |
4256 | case DW_OP_const8s: | |
4257 | gcc_assert (HOST_BITS_PER_LONG >= 64); | |
4258 | fputc (',', asm_out_file); | |
4259 | dw2_asm_output_data_raw (8, val1->v.val_int); | |
4260 | break; | |
4261 | ||
4262 | case DW_OP_skip: | |
4263 | case DW_OP_bra: | |
4264 | { | |
4265 | int offset; | |
4266 | ||
4267 | gcc_assert (val1->val_class == dw_val_class_loc); | |
4268 | offset = val1->v.val_loc->dw_loc_addr - (loc->dw_loc_addr + 3); | |
4269 | ||
4270 | fputc (',', asm_out_file); | |
4271 | dw2_asm_output_data_raw (2, offset); | |
4272 | } | |
4273 | break; | |
4274 | ||
4275 | case DW_OP_constu: | |
4276 | case DW_OP_plus_uconst: | |
4277 | case DW_OP_regx: | |
4278 | case DW_OP_piece: | |
4279 | fputc (',', asm_out_file); | |
4280 | dw2_asm_output_data_uleb128_raw (val1->v.val_unsigned); | |
4281 | break; | |
4282 | ||
4283 | case DW_OP_consts: | |
4284 | case DW_OP_breg0: | |
4285 | case DW_OP_breg1: | |
4286 | case DW_OP_breg2: | |
4287 | case DW_OP_breg3: | |
4288 | case DW_OP_breg4: | |
4289 | case DW_OP_breg5: | |
4290 | case DW_OP_breg6: | |
4291 | case DW_OP_breg7: | |
4292 | case DW_OP_breg8: | |
4293 | case DW_OP_breg9: | |
4294 | case DW_OP_breg10: | |
4295 | case DW_OP_breg11: | |
4296 | case DW_OP_breg12: | |
4297 | case DW_OP_breg13: | |
4298 | case DW_OP_breg14: | |
4299 | case DW_OP_breg15: | |
4300 | case DW_OP_breg16: | |
4301 | case DW_OP_breg17: | |
4302 | case DW_OP_breg18: | |
4303 | case DW_OP_breg19: | |
4304 | case DW_OP_breg20: | |
4305 | case DW_OP_breg21: | |
4306 | case DW_OP_breg22: | |
4307 | case DW_OP_breg23: | |
4308 | case DW_OP_breg24: | |
4309 | case DW_OP_breg25: | |
4310 | case DW_OP_breg26: | |
4311 | case DW_OP_breg27: | |
4312 | case DW_OP_breg28: | |
4313 | case DW_OP_breg29: | |
4314 | case DW_OP_breg30: | |
4315 | case DW_OP_breg31: | |
4316 | case DW_OP_fbreg: | |
4317 | fputc (',', asm_out_file); | |
4318 | dw2_asm_output_data_sleb128_raw (val1->v.val_int); | |
4319 | break; | |
4320 | ||
4321 | case DW_OP_bregx: | |
4322 | fputc (',', asm_out_file); | |
4323 | dw2_asm_output_data_uleb128_raw (val1->v.val_unsigned); | |
4324 | fputc (',', asm_out_file); | |
4325 | dw2_asm_output_data_sleb128_raw (val2->v.val_int); | |
4326 | break; | |
4327 | ||
4328 | case INTERNAL_DW_OP_tls_addr: | |
4329 | gcc_unreachable (); | |
4330 | ||
4331 | default: | |
4332 | /* Other codes have no operands. */ | |
4333 | break; | |
4334 | } | |
4335 | } | |
4336 | ||
4337 | static void | |
4338 | output_loc_sequence_raw (dw_loc_descr_ref loc) | |
4339 | { | |
4340 | while (1) | |
4341 | { | |
4342 | /* Output the opcode. */ | |
4343 | fprintf (asm_out_file, "0x%x", loc->dw_loc_opc); | |
4344 | output_loc_operands_raw (loc); | |
4345 | ||
4346 | if (!loc->dw_loc_next) | |
4347 | break; | |
4348 | loc = loc->dw_loc_next; | |
4349 | ||
4350 | fputc (',', asm_out_file); | |
4351 | } | |
4352 | } | |
4353 | ||
4b72e226 | 4354 | /* This routine will generate the correct assembly data for a location |
4355 | description based on a cfi entry with a complex address. */ | |
4356 | ||
4357 | static void | |
8ec3a57b | 4358 | output_cfa_loc (dw_cfi_ref cfi) |
4b72e226 | 4359 | { |
4360 | dw_loc_descr_ref loc; | |
4361 | unsigned long size; | |
4362 | ||
27a7a23a | 4363 | if (cfi->dw_cfi_opc == DW_CFA_expression) |
4364 | dw2_asm_output_data (1, cfi->dw_cfi_oprnd2.dw_cfi_reg_num, NULL); | |
4365 | ||
4b72e226 | 4366 | /* Output the size of the block. */ |
4367 | loc = cfi->dw_cfi_oprnd1.dw_cfi_loc; | |
4368 | size = size_of_locs (loc); | |
ca98eb0a | 4369 | dw2_asm_output_data_uleb128 (size, NULL); |
4b72e226 | 4370 | |
4371 | /* Now output the operations themselves. */ | |
4372 | output_loc_sequence (loc); | |
4373 | } | |
4374 | ||
fb39ff6e | 4375 | /* Similar, but used for .cfi_escape. */ |
4376 | ||
4377 | static void | |
4378 | output_cfa_loc_raw (dw_cfi_ref cfi) | |
4379 | { | |
4380 | dw_loc_descr_ref loc; | |
4381 | unsigned long size; | |
4382 | ||
4383 | if (cfi->dw_cfi_opc == DW_CFA_expression) | |
4384 | fprintf (asm_out_file, "0x%x,", cfi->dw_cfi_oprnd2.dw_cfi_reg_num); | |
4385 | ||
4386 | /* Output the size of the block. */ | |
4387 | loc = cfi->dw_cfi_oprnd1.dw_cfi_loc; | |
4388 | size = size_of_locs (loc); | |
4389 | dw2_asm_output_data_uleb128_raw (size); | |
4390 | fputc (',', asm_out_file); | |
4391 | ||
4392 | /* Now output the operations themselves. */ | |
4393 | output_loc_sequence_raw (loc); | |
4394 | } | |
4395 | ||
89fa767a | 4396 | /* This function builds a dwarf location descriptor sequence from a |
4397 | dw_cfa_location, adding the given OFFSET to the result of the | |
4398 | expression. */ | |
4b72e226 | 4399 | |
4400 | static struct dw_loc_descr_struct * | |
89fa767a | 4401 | build_cfa_loc (dw_cfa_location *cfa, HOST_WIDE_INT offset) |
4b72e226 | 4402 | { |
4403 | struct dw_loc_descr_struct *head, *tmp; | |
4404 | ||
89fa767a | 4405 | offset += cfa->offset; |
4406 | ||
12d886b8 | 4407 | if (cfa->indirect) |
5f19af7a | 4408 | { |
dde9bb3b | 4409 | head = new_reg_loc_descr (cfa->reg, cfa->base_offset); |
12d886b8 | 4410 | head->dw_loc_oprnd1.val_class = dw_val_class_const; |
4411 | tmp = new_loc_descr (DW_OP_deref, 0, 0); | |
4412 | add_loc_descr (&head, tmp); | |
89fa767a | 4413 | if (offset != 0) |
12d886b8 | 4414 | { |
89fa767a | 4415 | tmp = new_loc_descr (DW_OP_plus_uconst, offset, 0); |
12d886b8 | 4416 | add_loc_descr (&head, tmp); |
4417 | } | |
5f19af7a | 4418 | } |
5f19af7a | 4419 | else |
dde9bb3b | 4420 | head = new_reg_loc_descr (cfa->reg, offset); |
8c3f468d | 4421 | |
4b72e226 | 4422 | return head; |
4423 | } | |
4424 | ||
27a7a23a | 4425 | /* This function builds a dwarf location descriptor sequence for |
4426 | the address at OFFSET from the CFA when stack is aligned to | |
4427 | ALIGNMENT byte. */ | |
4428 | ||
4429 | static struct dw_loc_descr_struct * | |
4430 | build_cfa_aligned_loc (HOST_WIDE_INT offset, HOST_WIDE_INT alignment) | |
4431 | { | |
4432 | struct dw_loc_descr_struct *head; | |
4433 | unsigned int dwarf_fp | |
4434 | = DWARF_FRAME_REGNUM (HARD_FRAME_POINTER_REGNUM); | |
4435 | ||
4436 | /* When CFA is defined as FP+OFFSET, emulate stack alignment. */ | |
4437 | if (cfa.reg == HARD_FRAME_POINTER_REGNUM && cfa.indirect == 0) | |
4438 | { | |
dde9bb3b | 4439 | head = new_reg_loc_descr (dwarf_fp, 0); |
27a7a23a | 4440 | add_loc_descr (&head, int_loc_descriptor (alignment)); |
4441 | add_loc_descr (&head, new_loc_descr (DW_OP_and, 0, 0)); | |
1938132c | 4442 | loc_descr_plus_const (&head, offset); |
27a7a23a | 4443 | } |
27a7a23a | 4444 | else |
dde9bb3b | 4445 | head = new_reg_loc_descr (dwarf_fp, offset); |
27a7a23a | 4446 | return head; |
4447 | } | |
4448 | ||
8c3f468d | 4449 | /* This function fills in aa dw_cfa_location structure from a dwarf location |
4450 | descriptor sequence. */ | |
4b72e226 | 4451 | |
4452 | static void | |
8ec3a57b | 4453 | get_cfa_from_loc_descr (dw_cfa_location *cfa, struct dw_loc_descr_struct *loc) |
4b72e226 | 4454 | { |
f80d1bcd | 4455 | struct dw_loc_descr_struct *ptr; |
4b72e226 | 4456 | cfa->offset = 0; |
4457 | cfa->base_offset = 0; | |
4458 | cfa->indirect = 0; | |
4459 | cfa->reg = -1; | |
4460 | ||
4461 | for (ptr = loc; ptr != NULL; ptr = ptr->dw_loc_next) | |
4462 | { | |
4463 | enum dwarf_location_atom op = ptr->dw_loc_opc; | |
8c3f468d | 4464 | |
4b72e226 | 4465 | switch (op) |
f80d1bcd | 4466 | { |
4b72e226 | 4467 | case DW_OP_reg0: |
4468 | case DW_OP_reg1: | |
4469 | case DW_OP_reg2: | |
4470 | case DW_OP_reg3: | |
4471 | case DW_OP_reg4: | |
4472 | case DW_OP_reg5: | |
4473 | case DW_OP_reg6: | |
4474 | case DW_OP_reg7: | |
4475 | case DW_OP_reg8: | |
4476 | case DW_OP_reg9: | |
4477 | case DW_OP_reg10: | |
4478 | case DW_OP_reg11: | |
4479 | case DW_OP_reg12: | |
4480 | case DW_OP_reg13: | |
4481 | case DW_OP_reg14: | |
4482 | case DW_OP_reg15: | |
4483 | case DW_OP_reg16: | |
4484 | case DW_OP_reg17: | |
4485 | case DW_OP_reg18: | |
4486 | case DW_OP_reg19: | |
4487 | case DW_OP_reg20: | |
4488 | case DW_OP_reg21: | |
4489 | case DW_OP_reg22: | |
4490 | case DW_OP_reg23: | |
4491 | case DW_OP_reg24: | |
4492 | case DW_OP_reg25: | |
4493 | case DW_OP_reg26: | |
4494 | case DW_OP_reg27: | |
4495 | case DW_OP_reg28: | |
4496 | case DW_OP_reg29: | |
4497 | case DW_OP_reg30: | |
4498 | case DW_OP_reg31: | |
4499 | cfa->reg = op - DW_OP_reg0; | |
4500 | break; | |
4501 | case DW_OP_regx: | |
4502 | cfa->reg = ptr->dw_loc_oprnd1.v.val_int; | |
4503 | break; | |
4504 | case DW_OP_breg0: | |
4505 | case DW_OP_breg1: | |
4506 | case DW_OP_breg2: | |
4507 | case DW_OP_breg3: | |
4508 | case DW_OP_breg4: | |
4509 | case DW_OP_breg5: | |
4510 | case DW_OP_breg6: | |
4511 | case DW_OP_breg7: | |
4512 | case DW_OP_breg8: | |
4513 | case DW_OP_breg9: | |
4514 | case DW_OP_breg10: | |
4515 | case DW_OP_breg11: | |
4516 | case DW_OP_breg12: | |
4517 | case DW_OP_breg13: | |
4518 | case DW_OP_breg14: | |
4519 | case DW_OP_breg15: | |
4520 | case DW_OP_breg16: | |
4521 | case DW_OP_breg17: | |
4522 | case DW_OP_breg18: | |
4523 | case DW_OP_breg19: | |
4524 | case DW_OP_breg20: | |
4525 | case DW_OP_breg21: | |
4526 | case DW_OP_breg22: | |
4527 | case DW_OP_breg23: | |
4528 | case DW_OP_breg24: | |
4529 | case DW_OP_breg25: | |
4530 | case DW_OP_breg26: | |
4531 | case DW_OP_breg27: | |
4532 | case DW_OP_breg28: | |
4533 | case DW_OP_breg29: | |
4534 | case DW_OP_breg30: | |
4535 | case DW_OP_breg31: | |
4536 | cfa->reg = op - DW_OP_breg0; | |
4537 | cfa->base_offset = ptr->dw_loc_oprnd1.v.val_int; | |
4538 | break; | |
4539 | case DW_OP_bregx: | |
4540 | cfa->reg = ptr->dw_loc_oprnd1.v.val_int; | |
4541 | cfa->base_offset = ptr->dw_loc_oprnd2.v.val_int; | |
4542 | break; | |
4543 | case DW_OP_deref: | |
4544 | cfa->indirect = 1; | |
4545 | break; | |
4546 | case DW_OP_plus_uconst: | |
f80d1bcd | 4547 | cfa->offset = ptr->dw_loc_oprnd1.v.val_unsigned; |
4b72e226 | 4548 | break; |
4549 | default: | |
0a81f5a0 | 4550 | internal_error ("DW_LOC_OP %s not implemented", |
f060a027 | 4551 | dwarf_stack_op_name (ptr->dw_loc_opc)); |
4b72e226 | 4552 | } |
4553 | } | |
4554 | } | |
4555 | #endif /* .debug_frame support */ | |
4556 | \f | |
4557 | /* And now, the support for symbolic debugging information. */ | |
4558 | #ifdef DWARF2_DEBUGGING_INFO | |
4559 | ||
c366eeee | 4560 | /* .debug_str support. */ |
8ec3a57b | 4561 | static int output_indirect_string (void **, void *); |
4562 | ||
4563 | static void dwarf2out_init (const char *); | |
4564 | static void dwarf2out_finish (const char *); | |
4565 | static void dwarf2out_define (unsigned int, const char *); | |
4566 | static void dwarf2out_undef (unsigned int, const char *); | |
4567 | static void dwarf2out_start_source_file (unsigned, const char *); | |
4568 | static void dwarf2out_end_source_file (unsigned); | |
4569 | static void dwarf2out_begin_block (unsigned, unsigned); | |
4570 | static void dwarf2out_end_block (unsigned, unsigned); | |
5493cb9a | 4571 | static bool dwarf2out_ignore_block (const_tree); |
8ec3a57b | 4572 | static void dwarf2out_global_decl (tree); |
73ae3ef7 | 4573 | static void dwarf2out_type_decl (tree, int); |
df4d540f | 4574 | static void dwarf2out_imported_module_or_decl (tree, tree, tree, bool); |
5d8a39b7 | 4575 | static void dwarf2out_imported_module_or_decl_1 (tree, tree, tree, |
4576 | dw_die_ref); | |
8ec3a57b | 4577 | static void dwarf2out_abstract_function (tree); |
b2025850 | 4578 | static void dwarf2out_var_location (rtx); |
4579 | static void dwarf2out_begin_function (tree); | |
8d17cbdd | 4580 | static void dwarf2out_set_name (tree, tree); |
c140b944 | 4581 | |
4582 | /* The debug hooks structure. */ | |
4583 | ||
e42f6423 | 4584 | const struct gcc_debug_hooks dwarf2_debug_hooks = |
c140b944 | 4585 | { |
4586 | dwarf2out_init, | |
4587 | dwarf2out_finish, | |
4588 | dwarf2out_define, | |
4589 | dwarf2out_undef, | |
4590 | dwarf2out_start_source_file, | |
1dff614c | 4591 | dwarf2out_end_source_file, |
4592 | dwarf2out_begin_block, | |
b9b7f8b4 | 4593 | dwarf2out_end_block, |
b29760a8 | 4594 | dwarf2out_ignore_block, |
b9b7f8b4 | 4595 | dwarf2out_source_line, |
f76df888 | 4596 | dwarf2out_begin_prologue, |
e74e8242 | 4597 | debug_nothing_int_charstar, /* end_prologue */ |
b9b7f8b4 | 4598 | dwarf2out_end_epilogue, |
b2025850 | 4599 | dwarf2out_begin_function, |
c37d72e9 | 4600 | debug_nothing_int, /* end_function */ |
4601 | dwarf2out_decl, /* function_decl */ | |
4602 | dwarf2out_global_decl, | |
73ae3ef7 | 4603 | dwarf2out_type_decl, /* type_decl */ |
2b49746a | 4604 | dwarf2out_imported_module_or_decl, |
b29760a8 | 4605 | debug_nothing_tree, /* deferred_inline_function */ |
4606 | /* The DWARF 2 backend tries to reduce debugging bloat by not | |
4607 | emitting the abstract description of inline functions until | |
4608 | something tries to reference them. */ | |
4609 | dwarf2out_abstract_function, /* outlining_inline_function */ | |
cf8e41a4 | 4610 | debug_nothing_rtx, /* label */ |
5923a5e7 | 4611 | debug_nothing_int, /* handle_pch */ |
7a4afb3f | 4612 | dwarf2out_var_location, |
1897b881 | 4613 | dwarf2out_switch_text_section, |
8d17cbdd | 4614 | dwarf2out_set_name, |
7a4afb3f | 4615 | 1 /* start_end_main_source_file */ |
c140b944 | 4616 | }; |
573aba85 | 4617 | #endif |
c140b944 | 4618 | \f |
4b72e226 | 4619 | /* NOTE: In the comments in this file, many references are made to |
4620 | "Debugging Information Entries". This term is abbreviated as `DIE' | |
4621 | throughout the remainder of this file. */ | |
4622 | ||
4623 | /* An internal representation of the DWARF output is built, and then | |
4624 | walked to generate the DWARF debugging info. The walk of the internal | |
4625 | representation is done after the entire program has been compiled. | |
4626 | The types below are used to describe the internal representation. */ | |
4627 | ||
4628 | /* Various DIE's use offsets relative to the beginning of the | |
4629 | .debug_info section to refer to each other. */ | |
4630 | ||
4631 | typedef long int dw_offset; | |
4632 | ||
4633 | /* Define typedefs here to avoid circular dependencies. */ | |
4634 | ||
4635 | typedef struct dw_attr_struct *dw_attr_ref; | |
4636 | typedef struct dw_line_info_struct *dw_line_info_ref; | |
4637 | typedef struct dw_separate_line_info_struct *dw_separate_line_info_ref; | |
4638 | typedef struct pubname_struct *pubname_ref; | |
a36145ca | 4639 | typedef struct dw_ranges_struct *dw_ranges_ref; |
f221c0bd | 4640 | typedef struct dw_ranges_by_label_struct *dw_ranges_by_label_ref; |
4b72e226 | 4641 | |
4642 | /* Each entry in the line_info_table maintains the file and | |
4643 | line number associated with the label generated for that | |
4644 | entry. The label gives the PC value associated with | |
4645 | the line number entry. */ | |
4646 | ||
fb1e4f4a | 4647 | typedef struct GTY(()) dw_line_info_struct { |
4b72e226 | 4648 | unsigned long dw_file_num; |
4649 | unsigned long dw_line_num; | |
4650 | } | |
4651 | dw_line_info_entry; | |
4652 | ||
4653 | /* Line information for functions in separate sections; each one gets its | |
4654 | own sequence. */ | |
fb1e4f4a | 4655 | typedef struct GTY(()) dw_separate_line_info_struct { |
4b72e226 | 4656 | unsigned long dw_file_num; |
4657 | unsigned long dw_line_num; | |
4658 | unsigned long function; | |
4659 | } | |
4660 | dw_separate_line_info_entry; | |
4661 | ||
4662 | /* Each DIE attribute has a field specifying the attribute kind, | |
4663 | a link to the next attribute in the chain, and an attribute value. | |
4664 | Attributes are typically linked below the DIE they modify. */ | |
4665 | ||
fb1e4f4a | 4666 | typedef struct GTY(()) dw_attr_struct { |
4b72e226 | 4667 | enum dwarf_attribute dw_attr; |
4b72e226 | 4668 | dw_val_node dw_attr_val; |
4669 | } | |
4670 | dw_attr_node; | |
4671 | ||
6f56c055 | 4672 | DEF_VEC_O(dw_attr_node); |
4673 | DEF_VEC_ALLOC_O(dw_attr_node,gc); | |
4674 | ||
958656b7 | 4675 | /* The Debugging Information Entry (DIE) structure. DIEs form a tree. |
4676 | The children of each node form a circular list linked by | |
4677 | die_sib. die_child points to the node *before* the "first" child node. */ | |
4b72e226 | 4678 | |
fb1e4f4a | 4679 | typedef struct GTY((chain_circular ("%h.die_sib"))) die_struct { |
4b72e226 | 4680 | enum dwarf_tag die_tag; |
19f716e5 | 4681 | char *die_symbol; |
6f56c055 | 4682 | VEC(dw_attr_node,gc) * die_attr; |
4b72e226 | 4683 | dw_die_ref die_parent; |
4684 | dw_die_ref die_child; | |
4685 | dw_die_ref die_sib; | |
023dc493 | 4686 | dw_die_ref die_definition; /* ref from a specification to its definition */ |
4b72e226 | 4687 | dw_offset die_offset; |
4688 | unsigned long die_abbrev; | |
eabb26f3 | 4689 | int die_mark; |
f6e59711 | 4690 | /* Die is used and must not be pruned as unused. */ |
4691 | int die_perennial_p; | |
26863140 | 4692 | unsigned int decl_id; |
4b72e226 | 4693 | } |
4694 | die_node; | |
4695 | ||
958656b7 | 4696 | /* Evaluate 'expr' while 'c' is set to each child of DIE in order. */ |
4697 | #define FOR_EACH_CHILD(die, c, expr) do { \ | |
4698 | c = die->die_child; \ | |
4699 | if (c) do { \ | |
4700 | c = c->die_sib; \ | |
4701 | expr; \ | |
4702 | } while (c != die->die_child); \ | |
4703 | } while (0) | |
4704 | ||
4b72e226 | 4705 | /* The pubname structure */ |
4706 | ||
fb1e4f4a | 4707 | typedef struct GTY(()) pubname_struct { |
4b72e226 | 4708 | dw_die_ref die; |
52570507 | 4709 | const char *name; |
4b72e226 | 4710 | } |
4711 | pubname_entry; | |
4712 | ||
af84796a | 4713 | DEF_VEC_O(pubname_entry); |
4714 | DEF_VEC_ALLOC_O(pubname_entry, gc); | |
4715 | ||
fb1e4f4a | 4716 | struct GTY(()) dw_ranges_struct { |
f221c0bd | 4717 | /* If this is positive, it's a block number, otherwise it's a |
4718 | bitwise-negated index into dw_ranges_by_label. */ | |
4719 | int num; | |
4720 | }; | |
4721 | ||
fb1e4f4a | 4722 | struct GTY(()) dw_ranges_by_label_struct { |
f221c0bd | 4723 | const char *begin; |
4724 | const char *end; | |
a36145ca | 4725 | }; |
4726 | ||
4b72e226 | 4727 | /* The limbo die list structure. */ |
fb1e4f4a | 4728 | typedef struct GTY(()) limbo_die_struct { |
4b72e226 | 4729 | dw_die_ref die; |
15cfae4e | 4730 | tree created_for; |
4b72e226 | 4731 | struct limbo_die_struct *next; |
4732 | } | |
4733 | limbo_die_node; | |
4734 | ||
4735 | /* How to start an assembler comment. */ | |
4736 | #ifndef ASM_COMMENT_START | |
4737 | #define ASM_COMMENT_START ";#" | |
4738 | #endif | |
4739 | ||
6ef828f9 | 4740 | /* Define a macro which returns nonzero for a TYPE_DECL which was |
4b72e226 | 4741 | implicitly generated for a tagged type. |
4742 | ||
4743 | Note that unlike the gcc front end (which generates a NULL named | |
4744 | TYPE_DECL node for each complete tagged type, each array type, and | |
4745 | each function type node created) the g++ front end generates a | |
4746 | _named_ TYPE_DECL node for each tagged type node created. | |
4747 | These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to | |
4748 | generate a DW_TAG_typedef DIE for them. */ | |
4749 | ||
4750 | #define TYPE_DECL_IS_STUB(decl) \ | |
4751 | (DECL_NAME (decl) == NULL_TREE \ | |
4752 | || (DECL_ARTIFICIAL (decl) \ | |
4753 | && is_tagged_type (TREE_TYPE (decl)) \ | |
4754 | && ((decl == TYPE_STUB_DECL (TREE_TYPE (decl))) \ | |
4755 | /* This is necessary for stub decls that \ | |
4756 | appear in nested inline functions. */ \ | |
4757 | || (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE \ | |
4758 | && (decl_ultimate_origin (decl) \ | |
4759 | == TYPE_STUB_DECL (TREE_TYPE (decl))))))) | |
4760 | ||
4761 | /* Information concerning the compilation unit's programming | |
4762 | language, and compiler version. */ | |
4763 | ||
4b72e226 | 4764 | /* Fixed size portion of the DWARF compilation unit header. */ |
65bdc57c | 4765 | #define DWARF_COMPILE_UNIT_HEADER_SIZE \ |
4766 | (DWARF_INITIAL_LENGTH_SIZE + DWARF_OFFSET_SIZE + 3) | |
4b72e226 | 4767 | |
4b72e226 | 4768 | /* Fixed size portion of public names info. */ |
4769 | #define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2) | |
4770 | ||
4771 | /* Fixed size portion of the address range info. */ | |
4772 | #define DWARF_ARANGES_HEADER_SIZE \ | |
38c41660 | 4773 | (DWARF_ROUND (DWARF_INITIAL_LENGTH_SIZE + DWARF_OFFSET_SIZE + 4, \ |
61a9389f | 4774 | DWARF2_ADDR_SIZE * 2) \ |
38c41660 | 4775 | - DWARF_INITIAL_LENGTH_SIZE) |
4b72e226 | 4776 | |
4777 | /* Size of padding portion in the address range info. It must be | |
4778 | aligned to twice the pointer size. */ | |
4779 | #define DWARF_ARANGES_PAD_SIZE \ | |
38c41660 | 4780 | (DWARF_ROUND (DWARF_INITIAL_LENGTH_SIZE + DWARF_OFFSET_SIZE + 4, \ |
61a9389f | 4781 | DWARF2_ADDR_SIZE * 2) \ |
38c41660 | 4782 | - (DWARF_INITIAL_LENGTH_SIZE + DWARF_OFFSET_SIZE + 4)) |
4b72e226 | 4783 | |
142cf471 | 4784 | /* Use assembler line directives if available. */ |
4b72e226 | 4785 | #ifndef DWARF2_ASM_LINE_DEBUG_INFO |
142cf471 | 4786 | #ifdef HAVE_AS_DWARF2_DEBUG_LINE |
4787 | #define DWARF2_ASM_LINE_DEBUG_INFO 1 | |
4788 | #else | |
4b72e226 | 4789 | #define DWARF2_ASM_LINE_DEBUG_INFO 0 |
4790 | #endif | |
142cf471 | 4791 | #endif |
4b72e226 | 4792 | |
4b72e226 | 4793 | /* Minimum line offset in a special line info. opcode. |
4794 | This value was chosen to give a reasonable range of values. */ | |
4795 | #define DWARF_LINE_BASE -10 | |
4796 | ||
3fb1e43b | 4797 | /* First special line opcode - leave room for the standard opcodes. */ |
4b72e226 | 4798 | #define DWARF_LINE_OPCODE_BASE 10 |
4799 | ||
4800 | /* Range of line offsets in a special line info. opcode. */ | |
4801 | #define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1) | |
4802 | ||
4803 | /* Flag that indicates the initial value of the is_stmt_start flag. | |
4804 | In the present implementation, we do not mark any lines as | |
4805 | the beginning of a source statement, because that information | |
4806 | is not made available by the GCC front-end. */ | |
4807 | #define DWARF_LINE_DEFAULT_IS_STMT_START 1 | |
4808 | ||
38ac91bf | 4809 | #ifdef DWARF2_DEBUGGING_INFO |
4b72e226 | 4810 | /* This location is used by calc_die_sizes() to keep track |
4811 | the offset of each DIE within the .debug_info section. */ | |
4812 | static unsigned long next_die_offset; | |
38ac91bf | 4813 | #endif |
4b72e226 | 4814 | |
4815 | /* Record the root of the DIE's built for the current compilation unit. */ | |
573aba85 | 4816 | static GTY(()) dw_die_ref comp_unit_die; |
4b72e226 | 4817 | |
4818 | /* A list of DIEs with a NULL parent waiting to be relocated. */ | |
573aba85 | 4819 | static GTY(()) limbo_die_node *limbo_die_list; |
4b72e226 | 4820 | |
3740694f | 4821 | /* Filenames referenced by this compilation unit. */ |
69278c24 | 4822 | static GTY((param_is (struct dwarf_file_data))) htab_t file_table; |
5a3023d9 | 4823 | |
26863140 | 4824 | /* A hash table of references to DIE's that describe declarations. |
4825 | The key is a DECL_UID() which is a unique number identifying each decl. */ | |
4826 | static GTY ((param_is (struct die_struct))) htab_t decl_die_table; | |
4b72e226 | 4827 | |
bbc59868 | 4828 | /* A hash table of references to DIE's that describe COMMON blocks. |
4829 | The key is DECL_UID() ^ die_parent. */ | |
4830 | static GTY ((param_is (struct die_struct))) htab_t common_block_die_table; | |
4831 | ||
b2025850 | 4832 | /* Node of the variable location list. */ |
fb1e4f4a | 4833 | struct GTY ((chain_next ("%h.next"))) var_loc_node { |
b2025850 | 4834 | rtx GTY (()) var_loc_note; |
4835 | const char * GTY (()) label; | |
1897b881 | 4836 | const char * GTY (()) section_label; |
b2025850 | 4837 | struct var_loc_node * GTY (()) next; |
4838 | }; | |
4839 | ||
4840 | /* Variable location list. */ | |
fb1e4f4a | 4841 | struct GTY (()) var_loc_list_def { |
b2025850 | 4842 | struct var_loc_node * GTY (()) first; |
4843 | ||
4844 | /* Do not mark the last element of the chained list because | |
4845 | it is marked through the chain. */ | |
4846 | struct var_loc_node * GTY ((skip ("%h"))) last; | |
4847 | ||
4848 | /* DECL_UID of the variable decl. */ | |
4849 | unsigned int decl_id; | |
4850 | }; | |
4851 | typedef struct var_loc_list_def var_loc_list; | |
4852 | ||
b2025850 | 4853 | |
4854 | /* Table of decl location linked lists. */ | |
4855 | static GTY ((param_is (var_loc_list))) htab_t decl_loc_table; | |
4856 | ||
4b72e226 | 4857 | /* A pointer to the base of a list of references to DIE's that |
4858 | are uniquely identified by their tag, presence/absence of | |
4859 | children DIE's, and list of attribute/value pairs. */ | |
8ec3a57b | 4860 | static GTY((length ("abbrev_die_table_allocated"))) |
573aba85 | 4861 | dw_die_ref *abbrev_die_table; |
4b72e226 | 4862 | |
4863 | /* Number of elements currently allocated for abbrev_die_table. */ | |
909be935 | 4864 | static GTY(()) unsigned abbrev_die_table_allocated; |
4b72e226 | 4865 | |
4866 | /* Number of elements in type_die_table currently in use. */ | |
909be935 | 4867 | static GTY(()) unsigned abbrev_die_table_in_use; |
4b72e226 | 4868 | |
4869 | /* Size (in elements) of increments by which we may expand the | |
4870 | abbrev_die_table. */ | |
4871 | #define ABBREV_DIE_TABLE_INCREMENT 256 | |
4872 | ||
4873 | /* A pointer to the base of a table that contains line information | |
4874 | for each source code line in .text in the compilation unit. */ | |
8ec3a57b | 4875 | static GTY((length ("line_info_table_allocated"))) |
573aba85 | 4876 | dw_line_info_ref line_info_table; |
4b72e226 | 4877 | |
4878 | /* Number of elements currently allocated for line_info_table. */ | |
909be935 | 4879 | static GTY(()) unsigned line_info_table_allocated; |
4b72e226 | 4880 | |
573aba85 | 4881 | /* Number of elements in line_info_table currently in use. */ |
909be935 | 4882 | static GTY(()) unsigned line_info_table_in_use; |
4b72e226 | 4883 | |
4884 | /* A pointer to the base of a table that contains line information | |
4885 | for each source code line outside of .text in the compilation unit. */ | |
573aba85 | 4886 | static GTY ((length ("separate_line_info_table_allocated"))) |
4887 | dw_separate_line_info_ref separate_line_info_table; | |
4b72e226 | 4888 | |
4889 | /* Number of elements currently allocated for separate_line_info_table. */ | |
909be935 | 4890 | static GTY(()) unsigned separate_line_info_table_allocated; |
4b72e226 | 4891 | |
573aba85 | 4892 | /* Number of elements in separate_line_info_table currently in use. */ |
909be935 | 4893 | static GTY(()) unsigned separate_line_info_table_in_use; |
4b72e226 | 4894 | |
4895 | /* Size (in elements) of increments by which we may expand the | |
4896 | line_info_table. */ | |
4897 | #define LINE_INFO_TABLE_INCREMENT 1024 | |
4898 | ||
4899 | /* A pointer to the base of a table that contains a list of publicly | |
4900 | accessible names. */ | |
af84796a | 4901 | static GTY (()) VEC (pubname_entry, gc) * pubname_table; |
4b72e226 | 4902 | |
af84796a | 4903 | /* A pointer to the base of a table that contains a list of publicly |
4904 | accessible types. */ | |
4905 | static GTY (()) VEC (pubname_entry, gc) * pubtype_table; | |
4b72e226 | 4906 | |
a36145ca | 4907 | /* Array of dies for which we should generate .debug_arange info. */ |
573aba85 | 4908 | static GTY((length ("arange_table_allocated"))) dw_die_ref *arange_table; |
4b72e226 | 4909 | |
4910 | /* Number of elements currently allocated for arange_table. */ | |
909be935 | 4911 | static GTY(()) unsigned arange_table_allocated; |
4b72e226 | 4912 | |
4913 | /* Number of elements in arange_table currently in use. */ | |
909be935 | 4914 | static GTY(()) unsigned arange_table_in_use; |
4b72e226 | 4915 | |
4916 | /* Size (in elements) of increments by which we may expand the | |
4917 | arange_table. */ | |
4918 | #define ARANGE_TABLE_INCREMENT 64 | |
4919 | ||
a36145ca | 4920 | /* Array of dies for which we should generate .debug_ranges info. */ |
573aba85 | 4921 | static GTY ((length ("ranges_table_allocated"))) dw_ranges_ref ranges_table; |
a36145ca | 4922 | |
4923 | /* Number of elements currently allocated for ranges_table. */ | |
909be935 | 4924 | static GTY(()) unsigned ranges_table_allocated; |
a36145ca | 4925 | |
4926 | /* Number of elements in ranges_table currently in use. */ | |
909be935 | 4927 | static GTY(()) unsigned ranges_table_in_use; |
a36145ca | 4928 | |
f221c0bd | 4929 | /* Array of pairs of labels referenced in ranges_table. */ |
4930 | static GTY ((length ("ranges_by_label_allocated"))) | |
4931 | dw_ranges_by_label_ref ranges_by_label; | |
4932 | ||
4933 | /* Number of elements currently allocated for ranges_by_label. */ | |
4934 | static GTY(()) unsigned ranges_by_label_allocated; | |
4935 | ||
4936 | /* Number of elements in ranges_by_label currently in use. */ | |
4937 | static GTY(()) unsigned ranges_by_label_in_use; | |
4938 | ||
a36145ca | 4939 | /* Size (in elements) of increments by which we may expand the |
4940 | ranges_table. */ | |
4941 | #define RANGES_TABLE_INCREMENT 64 | |
4942 | ||
4c21a22f | 4943 | /* Whether we have location lists that need outputting */ |
dae1861f | 4944 | static GTY(()) bool have_location_lists; |
4c21a22f | 4945 | |
d3cdd238 | 4946 | /* Unique label counter. */ |
4947 | static GTY(()) unsigned int loclabel_num; | |
4948 | ||
909be935 | 4949 | #ifdef DWARF2_DEBUGGING_INFO |
4b72e226 | 4950 | /* Record whether the function being analyzed contains inlined functions. */ |
4951 | static int current_function_has_inlines; | |
38ac91bf | 4952 | #endif |
4b72e226 | 4953 | #if 0 && defined (MIPS_DEBUGGING_INFO) |
4954 | static int comp_unit_has_inlines; | |
4955 | #endif | |
4956 | ||
69278c24 | 4957 | /* The last file entry emitted by maybe_emit_file(). */ |
4958 | static GTY(()) struct dwarf_file_data * last_emitted_file; | |
909be935 | 4959 | |
6473f3f4 | 4960 | /* Number of internal labels generated by gen_internal_sym(). */ |
909be935 | 4961 | static GTY(()) int label_num; |
4962 | ||
62435250 | 4963 | /* Cached result of previous call to lookup_filename. */ |
4964 | static GTY(()) struct dwarf_file_data * file_table_last_lookup; | |
4965 | ||
573aba85 | 4966 | #ifdef DWARF2_DEBUGGING_INFO |
4967 | ||
89fa767a | 4968 | /* Offset from the "steady-state frame pointer" to the frame base, |
12d886b8 | 4969 | within the current function. */ |
89fa767a | 4970 | static HOST_WIDE_INT frame_pointer_fb_offset; |
12d886b8 | 4971 | |
4b72e226 | 4972 | /* Forward declarations for functions defined in this file. */ |
4973 | ||
5493cb9a | 4974 | static int is_pseudo_reg (const_rtx); |
8ec3a57b | 4975 | static tree type_main_variant (tree); |
5493cb9a | 4976 | static int is_tagged_type (const_tree); |
8ec3a57b | 4977 | static const char *dwarf_tag_name (unsigned); |
4978 | static const char *dwarf_attr_name (unsigned); | |
4979 | static const char *dwarf_form_name (unsigned); | |
5493cb9a | 4980 | static tree decl_ultimate_origin (const_tree); |
8ec3a57b | 4981 | static tree decl_class_context (tree); |
4982 | static void add_dwarf_attr (dw_die_ref, dw_attr_ref); | |
4983 | static inline enum dw_val_class AT_class (dw_attr_ref); | |
4984 | static void add_AT_flag (dw_die_ref, enum dwarf_attribute, unsigned); | |
4985 | static inline unsigned AT_flag (dw_attr_ref); | |
3d867824 | 4986 | static void add_AT_int (dw_die_ref, enum dwarf_attribute, HOST_WIDE_INT); |
4987 | static inline HOST_WIDE_INT AT_int (dw_attr_ref); | |
4988 | static void add_AT_unsigned (dw_die_ref, enum dwarf_attribute, unsigned HOST_WIDE_INT); | |
4989 | static inline unsigned HOST_WIDE_INT AT_unsigned (dw_attr_ref); | |
8ec3a57b | 4990 | static void add_AT_long_long (dw_die_ref, enum dwarf_attribute, unsigned long, |
4991 | unsigned long); | |
1b6ad376 | 4992 | static inline void add_AT_vec (dw_die_ref, enum dwarf_attribute, unsigned int, |
4993 | unsigned int, unsigned char *); | |
8ec3a57b | 4994 | static hashval_t debug_str_do_hash (const void *); |
4995 | static int debug_str_eq (const void *, const void *); | |
4996 | static void add_AT_string (dw_die_ref, enum dwarf_attribute, const char *); | |
4997 | static inline const char *AT_string (dw_attr_ref); | |
bc620c5c | 4998 | static enum dwarf_form AT_string_form (dw_attr_ref); |
8ec3a57b | 4999 | static void add_AT_die_ref (dw_die_ref, enum dwarf_attribute, dw_die_ref); |
023dc493 | 5000 | static void add_AT_specification (dw_die_ref, dw_die_ref); |
8ec3a57b | 5001 | static inline dw_die_ref AT_ref (dw_attr_ref); |
5002 | static inline int AT_ref_external (dw_attr_ref); | |
5003 | static inline void set_AT_ref_external (dw_attr_ref, int); | |
5004 | static void add_AT_fde_ref (dw_die_ref, enum dwarf_attribute, unsigned); | |
5005 | static void add_AT_loc (dw_die_ref, enum dwarf_attribute, dw_loc_descr_ref); | |
5006 | static inline dw_loc_descr_ref AT_loc (dw_attr_ref); | |
5007 | static void add_AT_loc_list (dw_die_ref, enum dwarf_attribute, | |
5008 | dw_loc_list_ref); | |
5009 | static inline dw_loc_list_ref AT_loc_list (dw_attr_ref); | |
5010 | static void add_AT_addr (dw_die_ref, enum dwarf_attribute, rtx); | |
5011 | static inline rtx AT_addr (dw_attr_ref); | |
5012 | static void add_AT_lbl_id (dw_die_ref, enum dwarf_attribute, const char *); | |
d08d29c0 | 5013 | static void add_AT_lineptr (dw_die_ref, enum dwarf_attribute, const char *); |
5014 | static void add_AT_macptr (dw_die_ref, enum dwarf_attribute, const char *); | |
3d867824 | 5015 | static void add_AT_offset (dw_die_ref, enum dwarf_attribute, |
5016 | unsigned HOST_WIDE_INT); | |
8ec3a57b | 5017 | static void add_AT_range_list (dw_die_ref, enum dwarf_attribute, |
5018 | unsigned long); | |
5019 | static inline const char *AT_lbl (dw_attr_ref); | |
5020 | static dw_attr_ref get_AT (dw_die_ref, enum dwarf_attribute); | |
5021 | static const char *get_AT_low_pc (dw_die_ref); | |
5022 | static const char *get_AT_hi_pc (dw_die_ref); | |
5023 | static const char *get_AT_string (dw_die_ref, enum dwarf_attribute); | |
5024 | static int get_AT_flag (dw_die_ref, enum dwarf_attribute); | |
5025 | static unsigned get_AT_unsigned (dw_die_ref, enum dwarf_attribute); | |
5026 | static inline dw_die_ref get_AT_ref (dw_die_ref, enum dwarf_attribute); | |
5027 | static bool is_c_family (void); | |
5028 | static bool is_cxx (void); | |
5029 | static bool is_java (void); | |
5030 | static bool is_fortran (void); | |
5031 | static bool is_ada (void); | |
5032 | static void remove_AT (dw_die_ref, enum dwarf_attribute); | |
2b49746a | 5033 | static void remove_child_TAG (dw_die_ref, enum dwarf_tag); |
8ec3a57b | 5034 | static void add_child_die (dw_die_ref, dw_die_ref); |
5035 | static dw_die_ref new_die (enum dwarf_tag, dw_die_ref, tree); | |
5036 | static dw_die_ref lookup_type_die (tree); | |
5037 | static void equate_type_number_to_die (tree, dw_die_ref); | |
26863140 | 5038 | static hashval_t decl_die_table_hash (const void *); |
5039 | static int decl_die_table_eq (const void *, const void *); | |
8ec3a57b | 5040 | static dw_die_ref lookup_decl_die (tree); |
bbc59868 | 5041 | static hashval_t common_block_die_table_hash (const void *); |
5042 | static int common_block_die_table_eq (const void *, const void *); | |
b2025850 | 5043 | static hashval_t decl_loc_table_hash (const void *); |
5044 | static int decl_loc_table_eq (const void *, const void *); | |
5493cb9a | 5045 | static var_loc_list *lookup_decl_loc (const_tree); |
8ec3a57b | 5046 | static void equate_decl_number_to_die (tree, dw_die_ref); |
b2025850 | 5047 | static void add_var_loc_to_decl (tree, struct var_loc_node *); |
8ec3a57b | 5048 | static void print_spaces (FILE *); |
5049 | static void print_die (dw_die_ref, FILE *); | |
5050 | static void print_dwarf_line_table (FILE *); | |
8ec3a57b | 5051 | static dw_die_ref push_new_compile_unit (dw_die_ref, dw_die_ref); |
5052 | static dw_die_ref pop_compile_unit (dw_die_ref); | |
5053 | static void loc_checksum (dw_loc_descr_ref, struct md5_ctx *); | |
5054 | static void attr_checksum (dw_attr_ref, struct md5_ctx *, int *); | |
5055 | static void die_checksum (dw_die_ref, struct md5_ctx *, int *); | |
5056 | static int same_loc_p (dw_loc_descr_ref, dw_loc_descr_ref, int *); | |
5493cb9a | 5057 | static int same_dw_val_p (const dw_val_node *, const dw_val_node *, int *); |
8ec3a57b | 5058 | static int same_attr_p (dw_attr_ref, dw_attr_ref, int *); |
5059 | static int same_die_p (dw_die_ref, dw_die_ref, int *); | |
5060 | static int same_die_p_wrap (dw_die_ref, dw_die_ref); | |
5061 | static void compute_section_prefix (dw_die_ref); | |
5062 | static int is_type_die (dw_die_ref); | |
5063 | static int is_comdat_die (dw_die_ref); | |
5064 | static int is_symbol_die (dw_die_ref); | |
5065 | static void assign_symbol_names (dw_die_ref); | |
5066 | static void break_out_includes (dw_die_ref); | |
5067 | static hashval_t htab_cu_hash (const void *); | |
5068 | static int htab_cu_eq (const void *, const void *); | |
5069 | static void htab_cu_del (void *); | |
5070 | static int check_duplicate_cu (dw_die_ref, htab_t, unsigned *); | |
5071 | static void record_comdat_symbol_number (dw_die_ref, htab_t, unsigned); | |
5072 | static void add_sibling_attributes (dw_die_ref); | |
5073 | static void build_abbrev_table (dw_die_ref); | |
5074 | static void output_location_lists (dw_die_ref); | |
d6d5e57f | 5075 | static int constant_size (unsigned HOST_WIDE_INT); |
8ec3a57b | 5076 | static unsigned long size_of_die (dw_die_ref); |
5077 | static void calc_die_sizes (dw_die_ref); | |
5078 | static void mark_dies (dw_die_ref); | |
5079 | static void unmark_dies (dw_die_ref); | |
5080 | static void unmark_all_dies (dw_die_ref); | |
af84796a | 5081 | static unsigned long size_of_pubnames (VEC (pubname_entry,gc) *); |
8ec3a57b | 5082 | static unsigned long size_of_aranges (void); |
5083 | static enum dwarf_form value_format (dw_attr_ref); | |
5084 | static void output_value_format (dw_attr_ref); | |
5085 | static void output_abbrev_section (void); | |
5086 | static void output_die_symbol (dw_die_ref); | |
5087 | static void output_die (dw_die_ref); | |
5088 | static void output_compilation_unit_header (void); | |
5089 | static void output_comp_unit (dw_die_ref, int); | |
5090 | static const char *dwarf2_name (tree, int); | |
5091 | static void add_pubname (tree, dw_die_ref); | |
a12691f0 | 5092 | static void add_pubname_string (const char *, dw_die_ref); |
af84796a | 5093 | static void add_pubtype (tree, dw_die_ref); |
5094 | static void output_pubnames (VEC (pubname_entry,gc) *); | |
8ec3a57b | 5095 | static void add_arange (tree, dw_die_ref); |
5096 | static void output_aranges (void); | |
f221c0bd | 5097 | static unsigned int add_ranges_num (int); |
5493cb9a | 5098 | static unsigned int add_ranges (const_tree); |
f221c0bd | 5099 | static unsigned int add_ranges_by_labels (const char *, const char *); |
8ec3a57b | 5100 | static void output_ranges (void); |
5101 | static void output_line_info (void); | |
5102 | static void output_file_names (void); | |
5103 | static dw_die_ref base_type_die (tree); | |
8ec3a57b | 5104 | static int is_base_type (tree); |
5493cb9a | 5105 | static bool is_subrange_type (const_tree); |
a7011153 | 5106 | static dw_die_ref subrange_type_die (tree, dw_die_ref); |
8ec3a57b | 5107 | static dw_die_ref modified_type_die (tree, int, int, dw_die_ref); |
5493cb9a | 5108 | static int type_is_enum (const_tree); |
5109 | static unsigned int dbx_reg_number (const_rtx); | |
fd51758c | 5110 | static void add_loc_descr_op_piece (dw_loc_descr_ref *, int); |
d53bb226 | 5111 | static dw_loc_descr_ref reg_loc_descriptor (rtx, enum var_init_status); |
39c7766b | 5112 | static dw_loc_descr_ref one_reg_loc_descriptor (unsigned int, |
d53bb226 | 5113 | enum var_init_status); |
5114 | static dw_loc_descr_ref multiple_reg_loc_descriptor (rtx, rtx, | |
5115 | enum var_init_status); | |
d53bb226 | 5116 | static dw_loc_descr_ref based_loc_descr (rtx, HOST_WIDE_INT, |
5117 | enum var_init_status); | |
5493cb9a | 5118 | static int is_based_loc (const_rtx); |
d53bb226 | 5119 | static dw_loc_descr_ref mem_loc_descriptor (rtx, enum machine_mode mode, |
5120 | enum var_init_status); | |
5121 | static dw_loc_descr_ref concat_loc_descriptor (rtx, rtx, | |
5122 | enum var_init_status); | |
5123 | static dw_loc_descr_ref loc_descriptor (rtx, enum var_init_status); | |
afcf285e | 5124 | static dw_loc_descr_ref loc_descriptor_from_tree_1 (tree, int); |
5125 | static dw_loc_descr_ref loc_descriptor_from_tree (tree); | |
8ec3a57b | 5126 | static HOST_WIDE_INT ceiling (HOST_WIDE_INT, unsigned int); |
5493cb9a | 5127 | static tree field_type (const_tree); |
5128 | static unsigned int simple_type_align_in_bits (const_tree); | |
5129 | static unsigned int simple_decl_align_in_bits (const_tree); | |
5130 | static unsigned HOST_WIDE_INT simple_type_size_in_bits (const_tree); | |
5131 | static HOST_WIDE_INT field_byte_offset (const_tree); | |
8ec3a57b | 5132 | static void add_AT_location_description (dw_die_ref, enum dwarf_attribute, |
5133 | dw_loc_descr_ref); | |
5134 | static void add_data_member_location_attribute (dw_die_ref, tree); | |
5135 | static void add_const_value_attribute (dw_die_ref, rtx); | |
1b6ad376 | 5136 | static void insert_int (HOST_WIDE_INT, unsigned, unsigned char *); |
5137 | static HOST_WIDE_INT extract_int (const unsigned char *, unsigned); | |
5493cb9a | 5138 | static void insert_float (const_rtx, unsigned char *); |
8ec3a57b | 5139 | static rtx rtl_for_decl_location (tree); |
b2025850 | 5140 | static void add_location_or_const_value_attribute (dw_die_ref, tree, |
5141 | enum dwarf_attribute); | |
8ec3a57b | 5142 | static void tree_add_const_value_attribute (dw_die_ref, tree); |
5143 | static void add_name_attribute (dw_die_ref, const char *); | |
5144 | static void add_comp_dir_attribute (dw_die_ref); | |
5145 | static void add_bound_info (dw_die_ref, enum dwarf_attribute, tree); | |
544cd34c | 5146 | static void add_subscript_info (dw_die_ref, tree, bool); |
8ec3a57b | 5147 | static void add_byte_size_attribute (dw_die_ref, tree); |
5148 | static void add_bit_offset_attribute (dw_die_ref, tree); | |
5149 | static void add_bit_size_attribute (dw_die_ref, tree); | |
5150 | static void add_prototyped_attribute (dw_die_ref, tree); | |
ebcb0478 | 5151 | static dw_die_ref add_abstract_origin_attribute (dw_die_ref, tree); |
8ec3a57b | 5152 | static void add_pure_or_virtual_attribute (dw_die_ref, tree); |
5153 | static void add_src_coords_attributes (dw_die_ref, tree); | |
5154 | static void add_name_and_src_coords_attributes (dw_die_ref, tree); | |
5155 | static void push_decl_scope (tree); | |
5156 | static void pop_decl_scope (void); | |
5157 | static dw_die_ref scope_die_for (tree, dw_die_ref); | |
5158 | static inline int local_scope_p (dw_die_ref); | |
a974aa3e | 5159 | static inline int class_scope_p (dw_die_ref); |
e89530cd | 5160 | static inline int class_or_namespace_scope_p (dw_die_ref); |
8ec3a57b | 5161 | static void add_type_attribute (dw_die_ref, tree, int, int, dw_die_ref); |
8ff30ff6 | 5162 | static void add_calling_convention_attribute (dw_die_ref, tree); |
5493cb9a | 5163 | static const char *type_tag (const_tree); |
5164 | static tree member_declared_type (const_tree); | |
4b72e226 | 5165 | #if 0 |
8ec3a57b | 5166 | static const char *decl_start_label (tree); |
4b72e226 | 5167 | #endif |
8ec3a57b | 5168 | static void gen_array_type_die (tree, dw_die_ref); |
1c79cc8c | 5169 | static void gen_descr_array_type_die (tree, struct array_descr_info *, dw_die_ref); |
4b72e226 | 5170 | #if 0 |
8ec3a57b | 5171 | static void gen_entry_point_die (tree, dw_die_ref); |
4b72e226 | 5172 | #endif |
93c7db82 | 5173 | static dw_die_ref gen_enumeration_type_die (tree, dw_die_ref); |
4b5d70fd | 5174 | static dw_die_ref gen_formal_parameter_die (tree, tree, dw_die_ref); |
8ec3a57b | 5175 | static void gen_unspecified_parameters_die (tree, dw_die_ref); |
5176 | static void gen_formal_types_die (tree, dw_die_ref); | |
5177 | static void gen_subprogram_die (tree, dw_die_ref); | |
4b5d70fd | 5178 | static void gen_variable_die (tree, tree, dw_die_ref); |
2eb674c9 | 5179 | static void gen_const_die (tree, dw_die_ref); |
8ec3a57b | 5180 | static void gen_label_die (tree, dw_die_ref); |
5181 | static void gen_lexical_block_die (tree, dw_die_ref, int); | |
5182 | static void gen_inlined_subroutine_die (tree, dw_die_ref, int); | |
5183 | static void gen_field_die (tree, dw_die_ref); | |
5184 | static void gen_ptr_to_mbr_type_die (tree, dw_die_ref); | |
5185 | static dw_die_ref gen_compile_unit_die (const char *); | |
8ec3a57b | 5186 | static void gen_inheritance_die (tree, tree, dw_die_ref); |
5187 | static void gen_member_die (tree, dw_die_ref); | |
0e4744ac | 5188 | static void gen_struct_or_union_type_die (tree, dw_die_ref, |
5189 | enum debug_info_usage); | |
8ec3a57b | 5190 | static void gen_subroutine_type_die (tree, dw_die_ref); |
5191 | static void gen_typedef_die (tree, dw_die_ref); | |
5192 | static void gen_type_die (tree, dw_die_ref); | |
8ec3a57b | 5193 | static void gen_block_die (tree, dw_die_ref, int); |
5194 | static void decls_for_scope (tree, dw_die_ref, int); | |
5493cb9a | 5195 | static int is_redundant_typedef (const_tree); |
4b1ab129 | 5196 | static void gen_namespace_die (tree, dw_die_ref); |
4b5d70fd | 5197 | static void gen_decl_die (tree, tree, dw_die_ref); |
2b49746a | 5198 | static dw_die_ref force_decl_die (tree); |
5199 | static dw_die_ref force_type_die (tree); | |
e89530cd | 5200 | static dw_die_ref setup_namespace_context (tree, dw_die_ref); |
df4d540f | 5201 | static dw_die_ref declare_in_namespace (tree, dw_die_ref); |
69278c24 | 5202 | static struct dwarf_file_data * lookup_filename (const char *); |
8ec3a57b | 5203 | static void retry_incomplete_types (void); |
5204 | static void gen_type_die_for_member (tree, tree, dw_die_ref); | |
5205 | static void splice_child_die (dw_die_ref, dw_die_ref); | |
5206 | static int file_info_cmp (const void *, const void *); | |
5207 | static dw_loc_list_ref new_loc_list (dw_loc_descr_ref, const char *, | |
5208 | const char *, const char *, unsigned); | |
5209 | static void add_loc_descr_to_loc_list (dw_loc_list_ref *, dw_loc_descr_ref, | |
5210 | const char *, const char *, | |
5211 | const char *); | |
5212 | static void output_loc_list (dw_loc_list_ref); | |
5213 | static char *gen_internal_sym (const char *); | |
5214 | ||
5215 | static void prune_unmark_dies (dw_die_ref); | |
5216 | static void prune_unused_types_mark (dw_die_ref, int); | |
5217 | static void prune_unused_types_walk (dw_die_ref); | |
5218 | static void prune_unused_types_walk_attribs (dw_die_ref); | |
5219 | static void prune_unused_types_prune (dw_die_ref); | |
5220 | static void prune_unused_types (void); | |
69278c24 | 5221 | static int maybe_emit_file (struct dwarf_file_data *fd); |
c83a163c | 5222 | |
4b72e226 | 5223 | /* Section names used to hold DWARF debugging information. */ |
5224 | #ifndef DEBUG_INFO_SECTION | |
5225 | #define DEBUG_INFO_SECTION ".debug_info" | |
5226 | #endif | |
049aa99b | 5227 | #ifndef DEBUG_ABBREV_SECTION |
5228 | #define DEBUG_ABBREV_SECTION ".debug_abbrev" | |
4b72e226 | 5229 | #endif |
049aa99b | 5230 | #ifndef DEBUG_ARANGES_SECTION |
5231 | #define DEBUG_ARANGES_SECTION ".debug_aranges" | |
4b72e226 | 5232 | #endif |
049aa99b | 5233 | #ifndef DEBUG_MACINFO_SECTION |
5234 | #define DEBUG_MACINFO_SECTION ".debug_macinfo" | |
4b72e226 | 5235 | #endif |
5236 | #ifndef DEBUG_LINE_SECTION | |
5237 | #define DEBUG_LINE_SECTION ".debug_line" | |
5238 | #endif | |
049aa99b | 5239 | #ifndef DEBUG_LOC_SECTION |
5240 | #define DEBUG_LOC_SECTION ".debug_loc" | |
4b72e226 | 5241 | #endif |
049aa99b | 5242 | #ifndef DEBUG_PUBNAMES_SECTION |
5243 | #define DEBUG_PUBNAMES_SECTION ".debug_pubnames" | |
4b72e226 | 5244 | #endif |
049aa99b | 5245 | #ifndef DEBUG_STR_SECTION |
5246 | #define DEBUG_STR_SECTION ".debug_str" | |
4b72e226 | 5247 | #endif |
a36145ca | 5248 | #ifndef DEBUG_RANGES_SECTION |
5249 | #define DEBUG_RANGES_SECTION ".debug_ranges" | |
5250 | #endif | |
4b72e226 | 5251 | |
5252 | /* Standard ELF section names for compiled code and data. */ | |
25e5d448 | 5253 | #ifndef TEXT_SECTION_NAME |
5254 | #define TEXT_SECTION_NAME ".text" | |
4b72e226 | 5255 | #endif |
5256 | ||
80b7bd06 | 5257 | /* Section flags for .debug_str section. */ |
80b7bd06 | 5258 | #define DEBUG_STR_SECTION_FLAGS \ |
7765591b | 5259 | (HAVE_GAS_SHF_MERGE && flag_merge_debug_strings \ |
44bbb5f3 | 5260 | ? SECTION_DEBUG | SECTION_MERGE | SECTION_STRINGS | 1 \ |
5261 | : SECTION_DEBUG) | |
80b7bd06 | 5262 | |
4b72e226 | 5263 | /* Labels we insert at beginning sections we can reference instead of |
f80d1bcd | 5264 | the section names themselves. */ |
4b72e226 | 5265 | |
5266 | #ifndef TEXT_SECTION_LABEL | |
049aa99b | 5267 | #define TEXT_SECTION_LABEL "Ltext" |
4b72e226 | 5268 | #endif |
4d0e931f | 5269 | #ifndef COLD_TEXT_SECTION_LABEL |
5270 | #define COLD_TEXT_SECTION_LABEL "Ltext_cold" | |
5271 | #endif | |
4b72e226 | 5272 | #ifndef DEBUG_LINE_SECTION_LABEL |
049aa99b | 5273 | #define DEBUG_LINE_SECTION_LABEL "Ldebug_line" |
4b72e226 | 5274 | #endif |
5275 | #ifndef DEBUG_INFO_SECTION_LABEL | |
049aa99b | 5276 | #define DEBUG_INFO_SECTION_LABEL "Ldebug_info" |
4b72e226 | 5277 | #endif |
049aa99b | 5278 | #ifndef DEBUG_ABBREV_SECTION_LABEL |
5279 | #define DEBUG_ABBREV_SECTION_LABEL "Ldebug_abbrev" | |
4b72e226 | 5280 | #endif |
049aa99b | 5281 | #ifndef DEBUG_LOC_SECTION_LABEL |
5282 | #define DEBUG_LOC_SECTION_LABEL "Ldebug_loc" | |
4c21a22f | 5283 | #endif |
fe39c28c | 5284 | #ifndef DEBUG_RANGES_SECTION_LABEL |
5285 | #define DEBUG_RANGES_SECTION_LABEL "Ldebug_ranges" | |
5286 | #endif | |
1d340a5e | 5287 | #ifndef DEBUG_MACINFO_SECTION_LABEL |
5288 | #define DEBUG_MACINFO_SECTION_LABEL "Ldebug_macinfo" | |
5289 | #endif | |
a36145ca | 5290 | |
4b72e226 | 5291 | /* Definitions of defaults for formats and names of various special |
5292 | (artificial) labels which may be generated within this file (when the -g | |
ad8d48ea | 5293 | options is used and DWARF2_DEBUGGING_INFO is in effect. |
4b72e226 | 5294 | If necessary, these may be overridden from within the tm.h file, but |
5295 | typically, overriding these defaults is unnecessary. */ | |
5296 | ||
5297 | static char text_end_label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
5298 | static char text_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
4d0e931f | 5299 | static char cold_text_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; |
61a9389f | 5300 | static char cold_end_label[MAX_ARTIFICIAL_LABEL_BYTES]; |
4b72e226 | 5301 | static char abbrev_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; |
5302 | static char debug_info_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
5303 | static char debug_line_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
1d340a5e | 5304 | static char macinfo_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; |
4c21a22f | 5305 | static char loc_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; |
fe39c28c | 5306 | static char ranges_section_label[2 * MAX_ARTIFICIAL_LABEL_BYTES]; |
8c3f468d | 5307 | |
4b72e226 | 5308 | #ifndef TEXT_END_LABEL |
5309 | #define TEXT_END_LABEL "Letext" | |
5310 | #endif | |
4d0e931f | 5311 | #ifndef COLD_END_LABEL |
5312 | #define COLD_END_LABEL "Letext_cold" | |
5313 | #endif | |
4b72e226 | 5314 | #ifndef BLOCK_BEGIN_LABEL |
5315 | #define BLOCK_BEGIN_LABEL "LBB" | |
5316 | #endif | |
5317 | #ifndef BLOCK_END_LABEL | |
5318 | #define BLOCK_END_LABEL "LBE" | |
5319 | #endif | |
4b72e226 | 5320 | #ifndef LINE_CODE_LABEL |
5321 | #define LINE_CODE_LABEL "LM" | |
5322 | #endif | |
5323 | #ifndef SEPARATE_LINE_CODE_LABEL | |
5324 | #define SEPARATE_LINE_CODE_LABEL "LSM" | |
5325 | #endif | |
d6de7df9 | 5326 | |
4b72e226 | 5327 | \f |
5328 | /* We allow a language front-end to designate a function that is to be | |
822e391f | 5329 | called to "demangle" any name before it is put into a DIE. */ |
4b72e226 | 5330 | |
8ec3a57b | 5331 | static const char *(*demangle_name_func) (const char *); |
4b72e226 | 5332 | |
5333 | void | |
8ec3a57b | 5334 | dwarf2out_set_demangle_name_func (const char *(*func) (const char *)) |
4b72e226 | 5335 | { |
5336 | demangle_name_func = func; | |
5337 | } | |
4b72e226 | 5338 | |
5339 | /* Test if rtl node points to a pseudo register. */ | |
5340 | ||
5341 | static inline int | |
5493cb9a | 5342 | is_pseudo_reg (const_rtx rtl) |
4b72e226 | 5343 | { |
8ad4c111 | 5344 | return ((REG_P (rtl) && REGNO (rtl) >= FIRST_PSEUDO_REGISTER) |
4b72e226 | 5345 | || (GET_CODE (rtl) == SUBREG |
701e46d0 | 5346 | && REGNO (SUBREG_REG (rtl)) >= FIRST_PSEUDO_REGISTER)); |
4b72e226 | 5347 | } |
5348 | ||
5349 | /* Return a reference to a type, with its const and volatile qualifiers | |
5350 | removed. */ | |
5351 | ||
5352 | static inline tree | |
8ec3a57b | 5353 | type_main_variant (tree type) |
4b72e226 | 5354 | { |
5355 | type = TYPE_MAIN_VARIANT (type); | |
5356 | ||
8c3f468d | 5357 | /* ??? There really should be only one main variant among any group of |
5358 | variants of a given type (and all of the MAIN_VARIANT values for all | |
5359 | members of the group should point to that one type) but sometimes the C | |
5360 | front-end messes this up for array types, so we work around that bug | |
5361 | here. */ | |
4b72e226 | 5362 | if (TREE_CODE (type) == ARRAY_TYPE) |
5363 | while (type != TYPE_MAIN_VARIANT (type)) | |
5364 | type = TYPE_MAIN_VARIANT (type); | |
5365 | ||
5366 | return type; | |
5367 | } | |
5368 | ||
6ef828f9 | 5369 | /* Return nonzero if the given type node represents a tagged type. */ |
4b72e226 | 5370 | |
5371 | static inline int | |
5493cb9a | 5372 | is_tagged_type (const_tree type) |
4b72e226 | 5373 | { |
19cb6b50 | 5374 | enum tree_code code = TREE_CODE (type); |
4b72e226 | 5375 | |
5376 | return (code == RECORD_TYPE || code == UNION_TYPE | |
5377 | || code == QUAL_UNION_TYPE || code == ENUMERAL_TYPE); | |
5378 | } | |
5379 | ||
5380 | /* Convert a DIE tag into its string name. */ | |
5381 | ||
5382 | static const char * | |
8ec3a57b | 5383 | dwarf_tag_name (unsigned int tag) |
4b72e226 | 5384 | { |
5385 | switch (tag) | |
5386 | { | |
5387 | case DW_TAG_padding: | |
5388 | return "DW_TAG_padding"; | |
5389 | case DW_TAG_array_type: | |
5390 | return "DW_TAG_array_type"; | |
5391 | case DW_TAG_class_type: | |
5392 | return "DW_TAG_class_type"; | |
5393 | case DW_TAG_entry_point: | |
5394 | return "DW_TAG_entry_point"; | |
5395 | case DW_TAG_enumeration_type: | |
5396 | return "DW_TAG_enumeration_type"; | |
5397 | case DW_TAG_formal_parameter: | |
5398 | return "DW_TAG_formal_parameter"; | |
5399 | case DW_TAG_imported_declaration: | |
5400 | return "DW_TAG_imported_declaration"; | |
5401 | case DW_TAG_label: | |
5402 | return "DW_TAG_label"; | |
5403 | case DW_TAG_lexical_block: | |
5404 | return "DW_TAG_lexical_block"; | |
5405 | case DW_TAG_member: | |
5406 | return "DW_TAG_member"; | |
5407 | case DW_TAG_pointer_type: | |
5408 | return "DW_TAG_pointer_type"; | |
5409 | case DW_TAG_reference_type: | |
5410 | return "DW_TAG_reference_type"; | |
5411 | case DW_TAG_compile_unit: | |
5412 | return "DW_TAG_compile_unit"; | |
5413 | case DW_TAG_string_type: | |
5414 | return "DW_TAG_string_type"; | |
5415 | case DW_TAG_structure_type: | |
5416 | return "DW_TAG_structure_type"; | |
5417 | case DW_TAG_subroutine_type: | |
5418 | return "DW_TAG_subroutine_type"; | |
5419 | case DW_TAG_typedef: | |
5420 | return "DW_TAG_typedef"; | |
5421 | case DW_TAG_union_type: | |
5422 | return "DW_TAG_union_type"; | |
5423 | case DW_TAG_unspecified_parameters: | |
5424 | return "DW_TAG_unspecified_parameters"; | |
5425 | case DW_TAG_variant: | |
5426 | return "DW_TAG_variant"; | |
5427 | case DW_TAG_common_block: | |
5428 | return "DW_TAG_common_block"; | |
5429 | case DW_TAG_common_inclusion: | |
5430 | return "DW_TAG_common_inclusion"; | |
5431 | case DW_TAG_inheritance: | |
5432 | return "DW_TAG_inheritance"; | |
5433 | case DW_TAG_inlined_subroutine: | |
5434 | return "DW_TAG_inlined_subroutine"; | |
5435 | case DW_TAG_module: | |
5436 | return "DW_TAG_module"; | |
5437 | case DW_TAG_ptr_to_member_type: | |
5438 | return "DW_TAG_ptr_to_member_type"; | |
5439 | case DW_TAG_set_type: | |
5440 | return "DW_TAG_set_type"; | |
5441 | case DW_TAG_subrange_type: | |
5442 | return "DW_TAG_subrange_type"; | |
5443 | case DW_TAG_with_stmt: | |
5444 | return "DW_TAG_with_stmt"; | |
5445 | case DW_TAG_access_declaration: | |
5446 | return "DW_TAG_access_declaration"; | |
5447 | case DW_TAG_base_type: | |
5448 | return "DW_TAG_base_type"; | |
5449 | case DW_TAG_catch_block: | |
5450 | return "DW_TAG_catch_block"; | |
5451 | case DW_TAG_const_type: | |
5452 | return "DW_TAG_const_type"; | |
5453 | case DW_TAG_constant: | |
5454 | return "DW_TAG_constant"; | |
5455 | case DW_TAG_enumerator: | |
5456 | return "DW_TAG_enumerator"; | |
5457 | case DW_TAG_file_type: | |
5458 | return "DW_TAG_file_type"; | |
5459 | case DW_TAG_friend: | |
5460 | return "DW_TAG_friend"; | |
5461 | case DW_TAG_namelist: | |
5462 | return "DW_TAG_namelist"; | |
5463 | case DW_TAG_namelist_item: | |
5464 | return "DW_TAG_namelist_item"; | |
5465 | case DW_TAG_packed_type: | |
5466 | return "DW_TAG_packed_type"; | |
5467 | case DW_TAG_subprogram: | |
5468 | return "DW_TAG_subprogram"; | |
5469 | case DW_TAG_template_type_param: | |
5470 | return "DW_TAG_template_type_param"; | |
5471 | case DW_TAG_template_value_param: | |
5472 | return "DW_TAG_template_value_param"; | |
5473 | case DW_TAG_thrown_type: | |
5474 | return "DW_TAG_thrown_type"; | |
5475 | case DW_TAG_try_block: | |
5476 | return "DW_TAG_try_block"; | |
5477 | case DW_TAG_variant_part: | |
5478 | return "DW_TAG_variant_part"; | |
5479 | case DW_TAG_variable: | |
5480 | return "DW_TAG_variable"; | |
5481 | case DW_TAG_volatile_type: | |
5482 | return "DW_TAG_volatile_type"; | |
03a61d93 | 5483 | case DW_TAG_dwarf_procedure: |
5484 | return "DW_TAG_dwarf_procedure"; | |
5485 | case DW_TAG_restrict_type: | |
5486 | return "DW_TAG_restrict_type"; | |
5487 | case DW_TAG_interface_type: | |
5488 | return "DW_TAG_interface_type"; | |
5489 | case DW_TAG_namespace: | |
5490 | return "DW_TAG_namespace"; | |
2b49746a | 5491 | case DW_TAG_imported_module: |
5492 | return "DW_TAG_imported_module"; | |
03a61d93 | 5493 | case DW_TAG_unspecified_type: |
5494 | return "DW_TAG_unspecified_type"; | |
5495 | case DW_TAG_partial_unit: | |
5496 | return "DW_TAG_partial_unit"; | |
5497 | case DW_TAG_imported_unit: | |
5498 | return "DW_TAG_imported_unit"; | |
5499 | case DW_TAG_condition: | |
5500 | return "DW_TAG_condition"; | |
5501 | case DW_TAG_shared_type: | |
5502 | return "DW_TAG_shared_type"; | |
4b72e226 | 5503 | case DW_TAG_MIPS_loop: |
5504 | return "DW_TAG_MIPS_loop"; | |
5505 | case DW_TAG_format_label: | |
5506 | return "DW_TAG_format_label"; | |
5507 | case DW_TAG_function_template: | |
5508 | return "DW_TAG_function_template"; | |
5509 | case DW_TAG_class_template: | |
5510 | return "DW_TAG_class_template"; | |
19f716e5 | 5511 | case DW_TAG_GNU_BINCL: |
5512 | return "DW_TAG_GNU_BINCL"; | |
5513 | case DW_TAG_GNU_EINCL: | |
5514 | return "DW_TAG_GNU_EINCL"; | |
4b72e226 | 5515 | default: |
5516 | return "DW_TAG_<unknown>"; | |
5517 | } | |
5518 | } | |
5519 | ||
5520 | /* Convert a DWARF attribute code into its string name. */ | |
5521 | ||
5522 | static const char * | |
8ec3a57b | 5523 | dwarf_attr_name (unsigned int attr) |
4b72e226 | 5524 | { |
5525 | switch (attr) | |
5526 | { | |
5527 | case DW_AT_sibling: | |
5528 | return "DW_AT_sibling"; | |
5529 | case DW_AT_location: | |
5530 | return "DW_AT_location"; | |
5531 | case DW_AT_name: | |
5532 | return "DW_AT_name"; | |
5533 | case DW_AT_ordering: | |
5534 | return "DW_AT_ordering"; | |
5535 | case DW_AT_subscr_data: | |
5536 | return "DW_AT_subscr_data"; | |
5537 | case DW_AT_byte_size: | |
5538 | return "DW_AT_byte_size"; | |
5539 | case DW_AT_bit_offset: | |
5540 | return "DW_AT_bit_offset"; | |
5541 | case DW_AT_bit_size: | |
5542 | return "DW_AT_bit_size"; | |
5543 | case DW_AT_element_list: | |
5544 | return "DW_AT_element_list"; | |
5545 | case DW_AT_stmt_list: | |
5546 | return "DW_AT_stmt_list"; | |
5547 | case DW_AT_low_pc: | |
5548 | return "DW_AT_low_pc"; | |
5549 | case DW_AT_high_pc: | |
5550 | return "DW_AT_high_pc"; | |
5551 | case DW_AT_language: | |
5552 | return "DW_AT_language"; | |
5553 | case DW_AT_member: | |
5554 | return "DW_AT_member"; | |
5555 | case DW_AT_discr: | |
5556 | return "DW_AT_discr"; | |
5557 | case DW_AT_discr_value: | |
5558 | return "DW_AT_discr_value"; | |
5559 | case DW_AT_visibility: | |
5560 | return "DW_AT_visibility"; | |
5561 | case DW_AT_import: | |
5562 | return "DW_AT_import"; | |
5563 | case DW_AT_string_length: | |
5564 | return "DW_AT_string_length"; | |
5565 | case DW_AT_common_reference: | |
5566 | return "DW_AT_common_reference"; | |
5567 | case DW_AT_comp_dir: | |
5568 | return "DW_AT_comp_dir"; | |
5569 | case DW_AT_const_value: | |
5570 | return "DW_AT_const_value"; | |
5571 | case DW_AT_containing_type: | |
5572 | return "DW_AT_containing_type"; | |
5573 | case DW_AT_default_value: | |
5574 | return "DW_AT_default_value"; | |
5575 | case DW_AT_inline: | |
5576 | return "DW_AT_inline"; | |
5577 | case DW_AT_is_optional: | |
5578 | return "DW_AT_is_optional"; | |
5579 | case DW_AT_lower_bound: | |
5580 | return "DW_AT_lower_bound"; | |
5581 | case DW_AT_producer: | |
5582 | return "DW_AT_producer"; | |
5583 | case DW_AT_prototyped: | |
5584 | return "DW_AT_prototyped"; | |
5585 | case DW_AT_return_addr: | |
5586 | return "DW_AT_return_addr"; | |
5587 | case DW_AT_start_scope: | |
5588 | return "DW_AT_start_scope"; | |
1c79cc8c | 5589 | case DW_AT_bit_stride: |
5590 | return "DW_AT_bit_stride"; | |
4b72e226 | 5591 | case DW_AT_upper_bound: |
5592 | return "DW_AT_upper_bound"; | |
5593 | case DW_AT_abstract_origin: | |
5594 | return "DW_AT_abstract_origin"; | |
5595 | case DW_AT_accessibility: | |
5596 | return "DW_AT_accessibility"; | |
5597 | case DW_AT_address_class: | |
5598 | return "DW_AT_address_class"; | |
5599 | case DW_AT_artificial: | |
5600 | return "DW_AT_artificial"; | |
5601 | case DW_AT_base_types: | |
5602 | return "DW_AT_base_types"; | |
5603 | case DW_AT_calling_convention: | |
5604 | return "DW_AT_calling_convention"; | |
5605 | case DW_AT_count: | |
5606 | return "DW_AT_count"; | |
5607 | case DW_AT_data_member_location: | |
5608 | return "DW_AT_data_member_location"; | |
5609 | case DW_AT_decl_column: | |
5610 | return "DW_AT_decl_column"; | |
5611 | case DW_AT_decl_file: | |
5612 | return "DW_AT_decl_file"; | |
5613 | case DW_AT_decl_line: | |
5614 | return "DW_AT_decl_line"; | |
5615 | case DW_AT_declaration: | |
5616 | return "DW_AT_declaration"; | |
5617 | case DW_AT_discr_list: | |
5618 | return "DW_AT_discr_list"; | |
5619 | case DW_AT_encoding: | |
5620 | return "DW_AT_encoding"; | |
5621 | case DW_AT_external: | |
5622 | return "DW_AT_external"; | |
cb3582e7 | 5623 | case DW_AT_explicit: |
5624 | return "DW_AT_explicit"; | |
4b72e226 | 5625 | case DW_AT_frame_base: |
5626 | return "DW_AT_frame_base"; | |
5627 | case DW_AT_friend: | |
5628 | return "DW_AT_friend"; | |
5629 | case DW_AT_identifier_case: | |
5630 | return "DW_AT_identifier_case"; | |
5631 | case DW_AT_macro_info: | |
5632 | return "DW_AT_macro_info"; | |
5633 | case DW_AT_namelist_items: | |
5634 | return "DW_AT_namelist_items"; | |
5635 | case DW_AT_priority: | |
5636 | return "DW_AT_priority"; | |
5637 | case DW_AT_segment: | |
5638 | return "DW_AT_segment"; | |
5639 | case DW_AT_specification: | |
5640 | return "DW_AT_specification"; | |
5641 | case DW_AT_static_link: | |
5642 | return "DW_AT_static_link"; | |
5643 | case DW_AT_type: | |
5644 | return "DW_AT_type"; | |
5645 | case DW_AT_use_location: | |
5646 | return "DW_AT_use_location"; | |
5647 | case DW_AT_variable_parameter: | |
5648 | return "DW_AT_variable_parameter"; | |
5649 | case DW_AT_virtuality: | |
5650 | return "DW_AT_virtuality"; | |
5651 | case DW_AT_vtable_elem_location: | |
5652 | return "DW_AT_vtable_elem_location"; | |
5653 | ||
a36145ca | 5654 | case DW_AT_allocated: |
5655 | return "DW_AT_allocated"; | |
5656 | case DW_AT_associated: | |
5657 | return "DW_AT_associated"; | |
5658 | case DW_AT_data_location: | |
5659 | return "DW_AT_data_location"; | |
1c79cc8c | 5660 | case DW_AT_byte_stride: |
5661 | return "DW_AT_byte_stride"; | |
a36145ca | 5662 | case DW_AT_entry_pc: |
5663 | return "DW_AT_entry_pc"; | |
5664 | case DW_AT_use_UTF8: | |
5665 | return "DW_AT_use_UTF8"; | |
5666 | case DW_AT_extension: | |
5667 | return "DW_AT_extension"; | |
5668 | case DW_AT_ranges: | |
5669 | return "DW_AT_ranges"; | |
5670 | case DW_AT_trampoline: | |
5671 | return "DW_AT_trampoline"; | |
5672 | case DW_AT_call_column: | |
5673 | return "DW_AT_call_column"; | |
5674 | case DW_AT_call_file: | |
5675 | return "DW_AT_call_file"; | |
5676 | case DW_AT_call_line: | |
5677 | return "DW_AT_call_line"; | |
5678 | ||
4b72e226 | 5679 | case DW_AT_MIPS_fde: |
5680 | return "DW_AT_MIPS_fde"; | |
5681 | case DW_AT_MIPS_loop_begin: | |
5682 | return "DW_AT_MIPS_loop_begin"; | |
5683 | case DW_AT_MIPS_tail_loop_begin: | |
5684 | return "DW_AT_MIPS_tail_loop_begin"; | |
5685 | case DW_AT_MIPS_epilog_begin: | |
5686 | return "DW_AT_MIPS_epilog_begin"; | |
5687 | case DW_AT_MIPS_loop_unroll_factor: | |
5688 | return "DW_AT_MIPS_loop_unroll_factor"; | |
5689 | case DW_AT_MIPS_software_pipeline_depth: | |
5690 | return "DW_AT_MIPS_software_pipeline_depth"; | |
5691 | case DW_AT_MIPS_linkage_name: | |
5692 | return "DW_AT_MIPS_linkage_name"; | |
5693 | case DW_AT_MIPS_stride: | |
5694 | return "DW_AT_MIPS_stride"; | |
5695 | case DW_AT_MIPS_abstract_name: | |
5696 | return "DW_AT_MIPS_abstract_name"; | |
5697 | case DW_AT_MIPS_clone_origin: | |
5698 | return "DW_AT_MIPS_clone_origin"; | |
5699 | case DW_AT_MIPS_has_inlines: | |
5700 | return "DW_AT_MIPS_has_inlines"; | |
5701 | ||
5702 | case DW_AT_sf_names: | |
5703 | return "DW_AT_sf_names"; | |
5704 | case DW_AT_src_info: | |
5705 | return "DW_AT_src_info"; | |
5706 | case DW_AT_mac_info: | |
5707 | return "DW_AT_mac_info"; | |
5708 | case DW_AT_src_coords: | |
5709 | return "DW_AT_src_coords"; | |
5710 | case DW_AT_body_begin: | |
5711 | return "DW_AT_body_begin"; | |
5712 | case DW_AT_body_end: | |
5713 | return "DW_AT_body_end"; | |
634906d6 | 5714 | case DW_AT_GNU_vector: |
5715 | return "DW_AT_GNU_vector"; | |
5716 | ||
8d60d2bc | 5717 | case DW_AT_VMS_rtnbeg_pd_address: |
5718 | return "DW_AT_VMS_rtnbeg_pd_address"; | |
5719 | ||
4b72e226 | 5720 | default: |
5721 | return "DW_AT_<unknown>"; | |
5722 | } | |
5723 | } | |
5724 | ||
5725 | /* Convert a DWARF value form code into its string name. */ | |
5726 | ||
5727 | static const char * | |
8ec3a57b | 5728 | dwarf_form_name (unsigned int form) |
4b72e226 | 5729 | { |
5730 | switch (form) | |
5731 | { | |
5732 | case DW_FORM_addr: | |
5733 | return "DW_FORM_addr"; | |
5734 | case DW_FORM_block2: | |
5735 | return "DW_FORM_block2"; | |
5736 | case DW_FORM_block4: | |
5737 | return "DW_FORM_block4"; | |
5738 | case DW_FORM_data2: | |
5739 | return "DW_FORM_data2"; | |
5740 | case DW_FORM_data4: | |
5741 | return "DW_FORM_data4"; | |
5742 | case DW_FORM_data8: | |
5743 | return "DW_FORM_data8"; | |
5744 | case DW_FORM_string: | |
5745 | return "DW_FORM_string"; | |
5746 | case DW_FORM_block: | |
5747 | return "DW_FORM_block"; | |
5748 | case DW_FORM_block1: | |
5749 | return "DW_FORM_block1"; | |
5750 | case DW_FORM_data1: | |
5751 | return "DW_FORM_data1"; | |
5752 | case DW_FORM_flag: | |
5753 | return "DW_FORM_flag"; | |
5754 | case DW_FORM_sdata: | |
5755 | return "DW_FORM_sdata"; | |
5756 | case DW_FORM_strp: | |
5757 | return "DW_FORM_strp"; | |
5758 | case DW_FORM_udata: | |
5759 | return "DW_FORM_udata"; | |
5760 | case DW_FORM_ref_addr: | |
5761 | return "DW_FORM_ref_addr"; | |
5762 | case DW_FORM_ref1: | |
5763 | return "DW_FORM_ref1"; | |
5764 | case DW_FORM_ref2: | |
5765 | return "DW_FORM_ref2"; | |
5766 | case DW_FORM_ref4: | |
5767 | return "DW_FORM_ref4"; | |
5768 | case DW_FORM_ref8: | |
5769 | return "DW_FORM_ref8"; | |
5770 | case DW_FORM_ref_udata: | |
5771 | return "DW_FORM_ref_udata"; | |
5772 | case DW_FORM_indirect: | |
5773 | return "DW_FORM_indirect"; | |
8a8bfbe7 | 5774 | default: |
4b72e226 | 5775 | return "DW_FORM_<unknown>"; |
30ade641 | 5776 | } |
5777 | } | |
8a8bfbe7 | 5778 | \f |
5779 | /* Determine the "ultimate origin" of a decl. The decl may be an inlined | |
5780 | instance of an inlined instance of a decl which is local to an inline | |
5781 | function, so we have to trace all of the way back through the origin chain | |
5782 | to find out what sort of node actually served as the original seed for the | |
5783 | given block. */ | |
30ade641 | 5784 | |
8a8bfbe7 | 5785 | static tree |
5493cb9a | 5786 | decl_ultimate_origin (const_tree decl) |
30ade641 | 5787 | { |
5ded8c6f | 5788 | if (!CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_COMMON)) |
5789 | return NULL_TREE; | |
5790 | ||
e7b3c55c | 5791 | /* output_inline_function sets DECL_ABSTRACT_ORIGIN for all the |
5792 | nodes in the function to point to themselves; ignore that if | |
5793 | we're trying to output the abstract instance of this function. */ | |
5794 | if (DECL_ABSTRACT (decl) && DECL_ABSTRACT_ORIGIN (decl) == decl) | |
5795 | return NULL_TREE; | |
5796 | ||
7bd4f6b6 | 5797 | /* Since the DECL_ABSTRACT_ORIGIN for a DECL is supposed to be the |
5798 | most distant ancestor, this should never happen. */ | |
5799 | gcc_assert (!DECL_FROM_INLINE (DECL_ORIGIN (decl))); | |
8a8bfbe7 | 5800 | |
c0671ae8 | 5801 | return DECL_ABSTRACT_ORIGIN (decl); |
30ade641 | 5802 | } |
5803 | ||
8a8bfbe7 | 5804 | /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT |
5805 | of a virtual function may refer to a base class, so we check the 'this' | |
5806 | parameter. */ | |
ec1e49cc | 5807 | |
8a8bfbe7 | 5808 | static tree |
8ec3a57b | 5809 | decl_class_context (tree decl) |
30ade641 | 5810 | { |
8a8bfbe7 | 5811 | tree context = NULL_TREE; |
ec1e49cc | 5812 | |
8a8bfbe7 | 5813 | if (TREE_CODE (decl) != FUNCTION_DECL || ! DECL_VINDEX (decl)) |
5814 | context = DECL_CONTEXT (decl); | |
5815 | else | |
5816 | context = TYPE_MAIN_VARIANT | |
5817 | (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl))))); | |
ec1e49cc | 5818 | |
9308e976 | 5819 | if (context && !TYPE_P (context)) |
8a8bfbe7 | 5820 | context = NULL_TREE; |
5821 | ||
5822 | return context; | |
30ade641 | 5823 | } |
5824 | \f | |
958656b7 | 5825 | /* Add an attribute/value pair to a DIE. */ |
ec1e49cc | 5826 | |
5827 | static inline void | |
8ec3a57b | 5828 | add_dwarf_attr (dw_die_ref die, dw_attr_ref attr) |
30ade641 | 5829 | { |
6f56c055 | 5830 | /* Maybe this should be an assert? */ |
5831 | if (die == NULL) | |
5832 | return; | |
61a9389f | 5833 | |
6f56c055 | 5834 | if (die->die_attr == NULL) |
5835 | die->die_attr = VEC_alloc (dw_attr_node, gc, 1); | |
5836 | VEC_safe_push (dw_attr_node, gc, die->die_attr, attr); | |
30ade641 | 5837 | } |
5838 | ||
573aba85 | 5839 | static inline enum dw_val_class |
8ec3a57b | 5840 | AT_class (dw_attr_ref a) |
c90bf86c | 5841 | { |
5842 | return a->dw_attr_val.val_class; | |
5843 | } | |
5844 | ||
8a8bfbe7 | 5845 | /* Add a flag value attribute to a DIE. */ |
ec1e49cc | 5846 | |
8a8bfbe7 | 5847 | static inline void |
8ec3a57b | 5848 | add_AT_flag (dw_die_ref die, enum dwarf_attribute attr_kind, unsigned int flag) |
30ade641 | 5849 | { |
6f56c055 | 5850 | dw_attr_node attr; |
ec1e49cc | 5851 | |
6f56c055 | 5852 | attr.dw_attr = attr_kind; |
5853 | attr.dw_attr_val.val_class = dw_val_class_flag; | |
5854 | attr.dw_attr_val.v.val_flag = flag; | |
5855 | add_dwarf_attr (die, &attr); | |
30ade641 | 5856 | } |
5857 | ||
c90bf86c | 5858 | static inline unsigned |
8ec3a57b | 5859 | AT_flag (dw_attr_ref a) |
c90bf86c | 5860 | { |
7bd4f6b6 | 5861 | gcc_assert (a && AT_class (a) == dw_val_class_flag); |
5862 | return a->dw_attr_val.v.val_flag; | |
c90bf86c | 5863 | } |
5864 | ||
8a8bfbe7 | 5865 | /* Add a signed integer attribute value to a DIE. */ |
ec1e49cc | 5866 | |
8a8bfbe7 | 5867 | static inline void |
3d867824 | 5868 | add_AT_int (dw_die_ref die, enum dwarf_attribute attr_kind, HOST_WIDE_INT int_val) |
30ade641 | 5869 | { |
6f56c055 | 5870 | dw_attr_node attr; |
8a8bfbe7 | 5871 | |
6f56c055 | 5872 | attr.dw_attr = attr_kind; |
5873 | attr.dw_attr_val.val_class = dw_val_class_const; | |
5874 | attr.dw_attr_val.v.val_int = int_val; | |
5875 | add_dwarf_attr (die, &attr); | |
30ade641 | 5876 | } |
5877 | ||
3d867824 | 5878 | static inline HOST_WIDE_INT |
8ec3a57b | 5879 | AT_int (dw_attr_ref a) |
c90bf86c | 5880 | { |
7bd4f6b6 | 5881 | gcc_assert (a && AT_class (a) == dw_val_class_const); |
5882 | return a->dw_attr_val.v.val_int; | |
c90bf86c | 5883 | } |
5884 | ||
8a8bfbe7 | 5885 | /* Add an unsigned integer attribute value to a DIE. */ |
ec1e49cc | 5886 | |
8a8bfbe7 | 5887 | static inline void |
8ec3a57b | 5888 | add_AT_unsigned (dw_die_ref die, enum dwarf_attribute attr_kind, |
3d867824 | 5889 | unsigned HOST_WIDE_INT unsigned_val) |
30ade641 | 5890 | { |
6f56c055 | 5891 | dw_attr_node attr; |
8a8bfbe7 | 5892 | |
6f56c055 | 5893 | attr.dw_attr = attr_kind; |
5894 | attr.dw_attr_val.val_class = dw_val_class_unsigned_const; | |
5895 | attr.dw_attr_val.v.val_unsigned = unsigned_val; | |
5896 | add_dwarf_attr (die, &attr); | |
30ade641 | 5897 | } |
ec1e49cc | 5898 | |
3d867824 | 5899 | static inline unsigned HOST_WIDE_INT |
8ec3a57b | 5900 | AT_unsigned (dw_attr_ref a) |
c90bf86c | 5901 | { |
7bd4f6b6 | 5902 | gcc_assert (a && AT_class (a) == dw_val_class_unsigned_const); |
5903 | return a->dw_attr_val.v.val_unsigned; | |
c90bf86c | 5904 | } |
5905 | ||
8a8bfbe7 | 5906 | /* Add an unsigned double integer attribute value to a DIE. */ |
5907 | ||
5908 | static inline void | |
8ec3a57b | 5909 | add_AT_long_long (dw_die_ref die, enum dwarf_attribute attr_kind, |
5910 | long unsigned int val_hi, long unsigned int val_low) | |
30ade641 | 5911 | { |
6f56c055 | 5912 | dw_attr_node attr; |
ec1e49cc | 5913 | |
6f56c055 | 5914 | attr.dw_attr = attr_kind; |
5915 | attr.dw_attr_val.val_class = dw_val_class_long_long; | |
5916 | attr.dw_attr_val.v.val_long_long.hi = val_hi; | |
5917 | attr.dw_attr_val.v.val_long_long.low = val_low; | |
5918 | add_dwarf_attr (die, &attr); | |
8a8bfbe7 | 5919 | } |
ec1e49cc | 5920 | |
8a8bfbe7 | 5921 | /* Add a floating point attribute value to a DIE and return it. */ |
ec1e49cc | 5922 | |
8a8bfbe7 | 5923 | static inline void |
1b6ad376 | 5924 | add_AT_vec (dw_die_ref die, enum dwarf_attribute attr_kind, |
5925 | unsigned int length, unsigned int elt_size, unsigned char *array) | |
8a8bfbe7 | 5926 | { |
6f56c055 | 5927 | dw_attr_node attr; |
8a8bfbe7 | 5928 | |
6f56c055 | 5929 | attr.dw_attr = attr_kind; |
5930 | attr.dw_attr_val.val_class = dw_val_class_vec; | |
5931 | attr.dw_attr_val.v.val_vec.length = length; | |
5932 | attr.dw_attr_val.v.val_vec.elt_size = elt_size; | |
5933 | attr.dw_attr_val.v.val_vec.array = array; | |
5934 | add_dwarf_attr (die, &attr); | |
30ade641 | 5935 | } |
5936 | ||
573aba85 | 5937 | /* Hash and equality functions for debug_str_hash. */ |
5938 | ||
5939 | static hashval_t | |
8ec3a57b | 5940 | debug_str_do_hash (const void *x) |
573aba85 | 5941 | { |
5942 | return htab_hash_string (((const struct indirect_string_node *)x)->str); | |
5943 | } | |
5944 | ||
5945 | static int | |
8ec3a57b | 5946 | debug_str_eq (const void *x1, const void *x2) |
573aba85 | 5947 | { |
5948 | return strcmp ((((const struct indirect_string_node *)x1)->str), | |
5949 | (const char *)x2) == 0; | |
5950 | } | |
5951 | ||
8d17cbdd | 5952 | static struct indirect_string_node * |
5953 | find_AT_string (const char *str) | |
30ade641 | 5954 | { |
80b7bd06 | 5955 | struct indirect_string_node *node; |
b9a7cc69 | 5956 | void **slot; |
bc70bd5e | 5957 | |
80b7bd06 | 5958 | if (! debug_str_hash) |
8ec3a57b | 5959 | debug_str_hash = htab_create_ggc (10, debug_str_do_hash, |
573aba85 | 5960 | debug_str_eq, NULL); |
5961 | ||
5962 | slot = htab_find_slot_with_hash (debug_str_hash, str, | |
5963 | htab_hash_string (str), INSERT); | |
5964 | if (*slot == NULL) | |
facb12b2 | 5965 | { |
5966 | node = (struct indirect_string_node *) | |
5967 | ggc_alloc_cleared (sizeof (struct indirect_string_node)); | |
5968 | node->str = ggc_strdup (str); | |
5969 | *slot = node; | |
5970 | } | |
5971 | else | |
5972 | node = (struct indirect_string_node *) *slot; | |
5973 | ||
80b7bd06 | 5974 | node->refcount++; |
8d17cbdd | 5975 | return node; |
5976 | } | |
5977 | ||
5978 | /* Add a string attribute value to a DIE. */ | |
5979 | ||
5980 | static inline void | |
5981 | add_AT_string (dw_die_ref die, enum dwarf_attribute attr_kind, const char *str) | |
5982 | { | |
5983 | dw_attr_node attr; | |
5984 | struct indirect_string_node *node; | |
5985 | ||
5986 | node = find_AT_string (str); | |
ec1e49cc | 5987 | |
6f56c055 | 5988 | attr.dw_attr = attr_kind; |
5989 | attr.dw_attr_val.val_class = dw_val_class_str; | |
5990 | attr.dw_attr_val.v.val_str = node; | |
5991 | add_dwarf_attr (die, &attr); | |
8a8bfbe7 | 5992 | } |
ec1e49cc | 5993 | |
c90bf86c | 5994 | static inline const char * |
8ec3a57b | 5995 | AT_string (dw_attr_ref a) |
c90bf86c | 5996 | { |
7bd4f6b6 | 5997 | gcc_assert (a && AT_class (a) == dw_val_class_str); |
5998 | return a->dw_attr_val.v.val_str->str; | |
80b7bd06 | 5999 | } |
6000 | ||
6001 | /* Find out whether a string should be output inline in DIE | |
6002 | or out-of-line in .debug_str section. */ | |
6003 | ||
bc620c5c | 6004 | static enum dwarf_form |
8ec3a57b | 6005 | AT_string_form (dw_attr_ref a) |
80b7bd06 | 6006 | { |
7bd4f6b6 | 6007 | struct indirect_string_node *node; |
6008 | unsigned int len; | |
6009 | char label[32]; | |
80b7bd06 | 6010 | |
7bd4f6b6 | 6011 | gcc_assert (a && AT_class (a) == dw_val_class_str); |
8ff30ff6 | 6012 | |
7bd4f6b6 | 6013 | node = a->dw_attr_val.v.val_str; |
6014 | if (node->form) | |
6015 | return node->form; | |
8ff30ff6 | 6016 | |
7bd4f6b6 | 6017 | len = strlen (node->str) + 1; |
80b7bd06 | 6018 | |
7bd4f6b6 | 6019 | /* If the string is shorter or equal to the size of the reference, it is |
6020 | always better to put it inline. */ | |
6021 | if (len <= DWARF_OFFSET_SIZE || node->refcount == 0) | |
6022 | return node->form = DW_FORM_string; | |
80b7bd06 | 6023 | |
7bd4f6b6 | 6024 | /* If we cannot expect the linker to merge strings in .debug_str |
6025 | section, only put it into .debug_str if it is worth even in this | |
6026 | single module. */ | |
2f14b1f9 | 6027 | if ((debug_str_section->common.flags & SECTION_MERGE) == 0 |
7bd4f6b6 | 6028 | && (len - DWARF_OFFSET_SIZE) * node->refcount <= len) |
6029 | return node->form = DW_FORM_string; | |
8c3f468d | 6030 | |
7bd4f6b6 | 6031 | ASM_GENERATE_INTERNAL_LABEL (label, "LASF", dw2_string_counter); |
6032 | ++dw2_string_counter; | |
6033 | node->label = xstrdup (label); | |
c90bf86c | 6034 | |
7bd4f6b6 | 6035 | return node->form = DW_FORM_strp; |
c90bf86c | 6036 | } |
6037 | ||
8a8bfbe7 | 6038 | /* Add a DIE reference attribute value to a DIE. */ |
ec1e49cc | 6039 | |
8a8bfbe7 | 6040 | static inline void |
8ec3a57b | 6041 | add_AT_die_ref (dw_die_ref die, enum dwarf_attribute attr_kind, dw_die_ref targ_die) |
8a8bfbe7 | 6042 | { |
6f56c055 | 6043 | dw_attr_node attr; |
ec1e49cc | 6044 | |
6f56c055 | 6045 | attr.dw_attr = attr_kind; |
6046 | attr.dw_attr_val.val_class = dw_val_class_die_ref; | |
6047 | attr.dw_attr_val.v.val_die_ref.die = targ_die; | |
6048 | attr.dw_attr_val.v.val_die_ref.external = 0; | |
6049 | add_dwarf_attr (die, &attr); | |
8a8bfbe7 | 6050 | } |
34425fdc | 6051 | |
023dc493 | 6052 | /* Add an AT_specification attribute to a DIE, and also make the back |
8b332087 | 6053 | pointer from the specification to the definition. */ |
023dc493 | 6054 | |
6055 | static inline void | |
6056 | add_AT_specification (dw_die_ref die, dw_die_ref targ_die) | |
6057 | { | |
6058 | add_AT_die_ref (die, DW_AT_specification, targ_die); | |
7bd4f6b6 | 6059 | gcc_assert (!targ_die->die_definition); |
023dc493 | 6060 | targ_die->die_definition = die; |
6061 | } | |
6062 | ||
c90bf86c | 6063 | static inline dw_die_ref |
8ec3a57b | 6064 | AT_ref (dw_attr_ref a) |
c90bf86c | 6065 | { |
7bd4f6b6 | 6066 | gcc_assert (a && AT_class (a) == dw_val_class_die_ref); |
6067 | return a->dw_attr_val.v.val_die_ref.die; | |
c90bf86c | 6068 | } |
6069 | ||
19f716e5 | 6070 | static inline int |
8ec3a57b | 6071 | AT_ref_external (dw_attr_ref a) |
19f716e5 | 6072 | { |
6073 | if (a && AT_class (a) == dw_val_class_die_ref) | |
6074 | return a->dw_attr_val.v.val_die_ref.external; | |
6075 | ||
6076 | return 0; | |
6077 | } | |
6078 | ||
19f716e5 | 6079 | static inline void |
8ec3a57b | 6080 | set_AT_ref_external (dw_attr_ref a, int i) |
19f716e5 | 6081 | { |
7bd4f6b6 | 6082 | gcc_assert (a && AT_class (a) == dw_val_class_die_ref); |
6083 | a->dw_attr_val.v.val_die_ref.external = i; | |
19f716e5 | 6084 | } |
6085 | ||
8a8bfbe7 | 6086 | /* Add an FDE reference attribute value to a DIE. */ |
34425fdc | 6087 | |
8a8bfbe7 | 6088 | static inline void |
8ec3a57b | 6089 | add_AT_fde_ref (dw_die_ref die, enum dwarf_attribute attr_kind, unsigned int targ_fde) |
8a8bfbe7 | 6090 | { |
6f56c055 | 6091 | dw_attr_node attr; |
34425fdc | 6092 | |
6f56c055 | 6093 | attr.dw_attr = attr_kind; |
6094 | attr.dw_attr_val.val_class = dw_val_class_fde_ref; | |
6095 | attr.dw_attr_val.v.val_fde_index = targ_fde; | |
6096 | add_dwarf_attr (die, &attr); | |
30ade641 | 6097 | } |
ec1e49cc | 6098 | |
8a8bfbe7 | 6099 | /* Add a location description attribute value to a DIE. */ |
ec1e49cc | 6100 | |
8a8bfbe7 | 6101 | static inline void |
8ec3a57b | 6102 | add_AT_loc (dw_die_ref die, enum dwarf_attribute attr_kind, dw_loc_descr_ref loc) |
8a8bfbe7 | 6103 | { |
6f56c055 | 6104 | dw_attr_node attr; |
ec1e49cc | 6105 | |
6f56c055 | 6106 | attr.dw_attr = attr_kind; |
6107 | attr.dw_attr_val.val_class = dw_val_class_loc; | |
6108 | attr.dw_attr_val.v.val_loc = loc; | |
6109 | add_dwarf_attr (die, &attr); | |
30ade641 | 6110 | } |
6111 | ||
c90bf86c | 6112 | static inline dw_loc_descr_ref |
8ec3a57b | 6113 | AT_loc (dw_attr_ref a) |
c90bf86c | 6114 | { |
7bd4f6b6 | 6115 | gcc_assert (a && AT_class (a) == dw_val_class_loc); |
6116 | return a->dw_attr_val.v.val_loc; | |
c90bf86c | 6117 | } |
6118 | ||
4c21a22f | 6119 | static inline void |
8ec3a57b | 6120 | add_AT_loc_list (dw_die_ref die, enum dwarf_attribute attr_kind, dw_loc_list_ref loc_list) |
4c21a22f | 6121 | { |
6f56c055 | 6122 | dw_attr_node attr; |
4c21a22f | 6123 | |
6f56c055 | 6124 | attr.dw_attr = attr_kind; |
6125 | attr.dw_attr_val.val_class = dw_val_class_loc_list; | |
6126 | attr.dw_attr_val.v.val_loc_list = loc_list; | |
6127 | add_dwarf_attr (die, &attr); | |
dae1861f | 6128 | have_location_lists = true; |
4c21a22f | 6129 | } |
6130 | ||
4c21a22f | 6131 | static inline dw_loc_list_ref |
8ec3a57b | 6132 | AT_loc_list (dw_attr_ref a) |
4c21a22f | 6133 | { |
7bd4f6b6 | 6134 | gcc_assert (a && AT_class (a) == dw_val_class_loc_list); |
6135 | return a->dw_attr_val.v.val_loc_list; | |
4c21a22f | 6136 | } |
6137 | ||
8a8bfbe7 | 6138 | /* Add an address constant attribute value to a DIE. */ |
ec1e49cc | 6139 | |
8a8bfbe7 | 6140 | static inline void |
8ec3a57b | 6141 | add_AT_addr (dw_die_ref die, enum dwarf_attribute attr_kind, rtx addr) |
30ade641 | 6142 | { |
6f56c055 | 6143 | dw_attr_node attr; |
ec1e49cc | 6144 | |
6f56c055 | 6145 | attr.dw_attr = attr_kind; |
6146 | attr.dw_attr_val.val_class = dw_val_class_addr; | |
6147 | attr.dw_attr_val.v.val_addr = addr; | |
6148 | add_dwarf_attr (die, &attr); | |
30ade641 | 6149 | } |
6150 | ||
69278c24 | 6151 | /* Get the RTX from to an address DIE attribute. */ |
6152 | ||
eacbfaac | 6153 | static inline rtx |
8ec3a57b | 6154 | AT_addr (dw_attr_ref a) |
c90bf86c | 6155 | { |
7bd4f6b6 | 6156 | gcc_assert (a && AT_class (a) == dw_val_class_addr); |
6157 | return a->dw_attr_val.v.val_addr; | |
c90bf86c | 6158 | } |
6159 | ||
69278c24 | 6160 | /* Add a file attribute value to a DIE. */ |
6161 | ||
6162 | static inline void | |
6163 | add_AT_file (dw_die_ref die, enum dwarf_attribute attr_kind, | |
6164 | struct dwarf_file_data *fd) | |
6165 | { | |
6166 | dw_attr_node attr; | |
6167 | ||
6168 | attr.dw_attr = attr_kind; | |
6169 | attr.dw_attr_val.val_class = dw_val_class_file; | |
6170 | attr.dw_attr_val.v.val_file = fd; | |
6171 | add_dwarf_attr (die, &attr); | |
6172 | } | |
6173 | ||
6174 | /* Get the dwarf_file_data from a file DIE attribute. */ | |
6175 | ||
6176 | static inline struct dwarf_file_data * | |
6177 | AT_file (dw_attr_ref a) | |
6178 | { | |
6179 | gcc_assert (a && AT_class (a) == dw_val_class_file); | |
6180 | return a->dw_attr_val.v.val_file; | |
6181 | } | |
6182 | ||
8a8bfbe7 | 6183 | /* Add a label identifier attribute value to a DIE. */ |
ec1e49cc | 6184 | |
8a8bfbe7 | 6185 | static inline void |
8ec3a57b | 6186 | add_AT_lbl_id (dw_die_ref die, enum dwarf_attribute attr_kind, const char *lbl_id) |
30ade641 | 6187 | { |
6f56c055 | 6188 | dw_attr_node attr; |
ec1e49cc | 6189 | |
6f56c055 | 6190 | attr.dw_attr = attr_kind; |
6191 | attr.dw_attr_val.val_class = dw_val_class_lbl_id; | |
6192 | attr.dw_attr_val.v.val_lbl_id = xstrdup (lbl_id); | |
6193 | add_dwarf_attr (die, &attr); | |
8a8bfbe7 | 6194 | } |
ec1e49cc | 6195 | |
d08d29c0 | 6196 | /* Add a section offset attribute value to a DIE, an offset into the |
6197 | debug_line section. */ | |
8a8bfbe7 | 6198 | |
6199 | static inline void | |
d08d29c0 | 6200 | add_AT_lineptr (dw_die_ref die, enum dwarf_attribute attr_kind, |
6201 | const char *label) | |
8a8bfbe7 | 6202 | { |
6f56c055 | 6203 | dw_attr_node attr; |
ec1e49cc | 6204 | |
6f56c055 | 6205 | attr.dw_attr = attr_kind; |
6206 | attr.dw_attr_val.val_class = dw_val_class_lineptr; | |
6207 | attr.dw_attr_val.v.val_lbl_id = xstrdup (label); | |
6208 | add_dwarf_attr (die, &attr); | |
d08d29c0 | 6209 | } |
6210 | ||
6211 | /* Add a section offset attribute value to a DIE, an offset into the | |
6212 | debug_macinfo section. */ | |
6213 | ||
6214 | static inline void | |
6215 | add_AT_macptr (dw_die_ref die, enum dwarf_attribute attr_kind, | |
6216 | const char *label) | |
6217 | { | |
6f56c055 | 6218 | dw_attr_node attr; |
d08d29c0 | 6219 | |
6f56c055 | 6220 | attr.dw_attr = attr_kind; |
6221 | attr.dw_attr_val.val_class = dw_val_class_macptr; | |
6222 | attr.dw_attr_val.v.val_lbl_id = xstrdup (label); | |
6223 | add_dwarf_attr (die, &attr); | |
30ade641 | 6224 | } |
6225 | ||
a36145ca | 6226 | /* Add an offset attribute value to a DIE. */ |
6227 | ||
fe39c28c | 6228 | static inline void |
3d867824 | 6229 | add_AT_offset (dw_die_ref die, enum dwarf_attribute attr_kind, |
6230 | unsigned HOST_WIDE_INT offset) | |
a36145ca | 6231 | { |
6f56c055 | 6232 | dw_attr_node attr; |
a36145ca | 6233 | |
6f56c055 | 6234 | attr.dw_attr = attr_kind; |
6235 | attr.dw_attr_val.val_class = dw_val_class_offset; | |
6236 | attr.dw_attr_val.v.val_offset = offset; | |
6237 | add_dwarf_attr (die, &attr); | |
a36145ca | 6238 | } |
6239 | ||
fe39c28c | 6240 | /* Add an range_list attribute value to a DIE. */ |
6241 | ||
6242 | static void | |
8ec3a57b | 6243 | add_AT_range_list (dw_die_ref die, enum dwarf_attribute attr_kind, |
6244 | long unsigned int offset) | |
fe39c28c | 6245 | { |
6f56c055 | 6246 | dw_attr_node attr; |
fe39c28c | 6247 | |
6f56c055 | 6248 | attr.dw_attr = attr_kind; |
6249 | attr.dw_attr_val.val_class = dw_val_class_range_list; | |
6250 | attr.dw_attr_val.v.val_offset = offset; | |
6251 | add_dwarf_attr (die, &attr); | |
fe39c28c | 6252 | } |
6253 | ||
c90bf86c | 6254 | static inline const char * |
8ec3a57b | 6255 | AT_lbl (dw_attr_ref a) |
30ade641 | 6256 | { |
7bd4f6b6 | 6257 | gcc_assert (a && (AT_class (a) == dw_val_class_lbl_id |
d08d29c0 | 6258 | || AT_class (a) == dw_val_class_lineptr |
6259 | || AT_class (a) == dw_val_class_macptr)); | |
7bd4f6b6 | 6260 | return a->dw_attr_val.v.val_lbl_id; |
30ade641 | 6261 | } |
6262 | ||
8a8bfbe7 | 6263 | /* Get the attribute of type attr_kind. */ |
ec1e49cc | 6264 | |
89df180d | 6265 | static dw_attr_ref |
8ec3a57b | 6266 | get_AT (dw_die_ref die, enum dwarf_attribute attr_kind) |
7524eb42 | 6267 | { |
19cb6b50 | 6268 | dw_attr_ref a; |
6f56c055 | 6269 | unsigned ix; |
19cb6b50 | 6270 | dw_die_ref spec = NULL; |
f80d1bcd | 6271 | |
6f56c055 | 6272 | if (! die) |
6273 | return NULL; | |
ec1e49cc | 6274 | |
6f56c055 | 6275 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, a); ix++) |
6276 | if (a->dw_attr == attr_kind) | |
6277 | return a; | |
6278 | else if (a->dw_attr == DW_AT_specification | |
6279 | || a->dw_attr == DW_AT_abstract_origin) | |
6280 | spec = AT_ref (a); | |
61a9389f | 6281 | |
6f56c055 | 6282 | if (spec) |
6283 | return get_AT (spec, attr_kind); | |
8a8bfbe7 | 6284 | |
6285 | return NULL; | |
7524eb42 | 6286 | } |
6287 | ||
8c3f468d | 6288 | /* Return the "low pc" attribute value, typically associated with a subprogram |
6289 | DIE. Return null if the "low pc" attribute is either not present, or if it | |
6290 | cannot be represented as an assembler label identifier. */ | |
ec1e49cc | 6291 | |
c90bf86c | 6292 | static inline const char * |
8ec3a57b | 6293 | get_AT_low_pc (dw_die_ref die) |
a3899bb7 | 6294 | { |
19cb6b50 | 6295 | dw_attr_ref a = get_AT (die, DW_AT_low_pc); |
8c3f468d | 6296 | |
433e0c6c | 6297 | return a ? AT_lbl (a) : NULL; |
a3899bb7 | 6298 | } |
6299 | ||
8c3f468d | 6300 | /* Return the "high pc" attribute value, typically associated with a subprogram |
6301 | DIE. Return null if the "high pc" attribute is either not present, or if it | |
6302 | cannot be represented as an assembler label identifier. */ | |
ec1e49cc | 6303 | |
c90bf86c | 6304 | static inline const char * |
8ec3a57b | 6305 | get_AT_hi_pc (dw_die_ref die) |
30ade641 | 6306 | { |
19cb6b50 | 6307 | dw_attr_ref a = get_AT (die, DW_AT_high_pc); |
8c3f468d | 6308 | |
433e0c6c | 6309 | return a ? AT_lbl (a) : NULL; |
8a8bfbe7 | 6310 | } |
6311 | ||
6312 | /* Return the value of the string attribute designated by ATTR_KIND, or | |
6313 | NULL if it is not present. */ | |
ec1e49cc | 6314 | |
c90bf86c | 6315 | static inline const char * |
8ec3a57b | 6316 | get_AT_string (dw_die_ref die, enum dwarf_attribute attr_kind) |
8a8bfbe7 | 6317 | { |
19cb6b50 | 6318 | dw_attr_ref a = get_AT (die, attr_kind); |
8c3f468d | 6319 | |
433e0c6c | 6320 | return a ? AT_string (a) : NULL; |
30ade641 | 6321 | } |
6322 | ||
8a8bfbe7 | 6323 | /* Return the value of the flag attribute designated by ATTR_KIND, or -1 |
6324 | if it is not present. */ | |
ec1e49cc | 6325 | |
8a8bfbe7 | 6326 | static inline int |
8ec3a57b | 6327 | get_AT_flag (dw_die_ref die, enum dwarf_attribute attr_kind) |
30ade641 | 6328 | { |
19cb6b50 | 6329 | dw_attr_ref a = get_AT (die, attr_kind); |
8c3f468d | 6330 | |
433e0c6c | 6331 | return a ? AT_flag (a) : 0; |
30ade641 | 6332 | } |
6333 | ||
8a8bfbe7 | 6334 | /* Return the value of the unsigned attribute designated by ATTR_KIND, or 0 |
6335 | if it is not present. */ | |
ec1e49cc | 6336 | |
8a8bfbe7 | 6337 | static inline unsigned |
8ec3a57b | 6338 | get_AT_unsigned (dw_die_ref die, enum dwarf_attribute attr_kind) |
30ade641 | 6339 | { |
19cb6b50 | 6340 | dw_attr_ref a = get_AT (die, attr_kind); |
8c3f468d | 6341 | |
433e0c6c | 6342 | return a ? AT_unsigned (a) : 0; |
c90bf86c | 6343 | } |
ec1e49cc | 6344 | |
c90bf86c | 6345 | static inline dw_die_ref |
8ec3a57b | 6346 | get_AT_ref (dw_die_ref die, enum dwarf_attribute attr_kind) |
c90bf86c | 6347 | { |
19cb6b50 | 6348 | dw_attr_ref a = get_AT (die, attr_kind); |
8c3f468d | 6349 | |
433e0c6c | 6350 | return a ? AT_ref (a) : NULL; |
8a8bfbe7 | 6351 | } |
ec1e49cc | 6352 | |
69278c24 | 6353 | static inline struct dwarf_file_data * |
6354 | get_AT_file (dw_die_ref die, enum dwarf_attribute attr_kind) | |
6355 | { | |
6356 | dw_attr_ref a = get_AT (die, attr_kind); | |
6357 | ||
6358 | return a ? AT_file (a) : NULL; | |
6359 | } | |
6360 | ||
600dbd47 | 6361 | /* Return TRUE if the language is C or C++. */ |
6362 | ||
6363 | static inline bool | |
8ec3a57b | 6364 | is_c_family (void) |
8a8bfbe7 | 6365 | { |
600dbd47 | 6366 | unsigned int lang = get_AT_unsigned (comp_unit_die, DW_AT_language); |
ec1e49cc | 6367 | |
bda642f9 | 6368 | return (lang == DW_LANG_C || lang == DW_LANG_C89 || lang == DW_LANG_ObjC |
6369 | || lang == DW_LANG_C99 | |
6370 | || lang == DW_LANG_C_plus_plus || lang == DW_LANG_ObjC_plus_plus); | |
f80d1bcd | 6371 | } |
ec1e49cc | 6372 | |
600dbd47 | 6373 | /* Return TRUE if the language is C++. */ |
6374 | ||
6375 | static inline bool | |
8ec3a57b | 6376 | is_cxx (void) |
bde7be7a | 6377 | { |
bda642f9 | 6378 | unsigned int lang = get_AT_unsigned (comp_unit_die, DW_AT_language); |
61a9389f | 6379 | |
bda642f9 | 6380 | return lang == DW_LANG_C_plus_plus || lang == DW_LANG_ObjC_plus_plus; |
bc70bd5e | 6381 | } |
bde7be7a | 6382 | |
600dbd47 | 6383 | /* Return TRUE if the language is Fortran. */ |
6384 | ||
6385 | static inline bool | |
8ec3a57b | 6386 | is_fortran (void) |
8a8bfbe7 | 6387 | { |
600dbd47 | 6388 | unsigned int lang = get_AT_unsigned (comp_unit_die, DW_AT_language); |
ec1e49cc | 6389 | |
4ee9c684 | 6390 | return (lang == DW_LANG_Fortran77 |
6391 | || lang == DW_LANG_Fortran90 | |
6392 | || lang == DW_LANG_Fortran95); | |
f80d1bcd | 6393 | } |
ec1e49cc | 6394 | |
600dbd47 | 6395 | /* Return TRUE if the language is Java. */ |
6396 | ||
6397 | static inline bool | |
8ec3a57b | 6398 | is_java (void) |
af4d39d8 | 6399 | { |
600dbd47 | 6400 | unsigned int lang = get_AT_unsigned (comp_unit_die, DW_AT_language); |
af4d39d8 | 6401 | |
600dbd47 | 6402 | return lang == DW_LANG_Java; |
6403 | } | |
6404 | ||
6405 | /* Return TRUE if the language is Ada. */ | |
6406 | ||
6407 | static inline bool | |
8ec3a57b | 6408 | is_ada (void) |
600dbd47 | 6409 | { |
6410 | unsigned int lang = get_AT_unsigned (comp_unit_die, DW_AT_language); | |
8ec3a57b | 6411 | |
600dbd47 | 6412 | return lang == DW_LANG_Ada95 || lang == DW_LANG_Ada83; |
af4d39d8 | 6413 | } |
6414 | ||
e7b3c55c | 6415 | /* Remove the specified attribute if present. */ |
6416 | ||
6417 | static void | |
8ec3a57b | 6418 | remove_AT (dw_die_ref die, enum dwarf_attribute attr_kind) |
8a8bfbe7 | 6419 | { |
6f56c055 | 6420 | dw_attr_ref a; |
6421 | unsigned ix; | |
30ade641 | 6422 | |
6f56c055 | 6423 | if (! die) |
6424 | return; | |
ec1e49cc | 6425 | |
6f56c055 | 6426 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, a); ix++) |
6427 | if (a->dw_attr == attr_kind) | |
6428 | { | |
b0aa6b33 | 6429 | if (AT_class (a) == dw_val_class_str) |
6430 | if (a->dw_attr_val.v.val_str->refcount) | |
6431 | a->dw_attr_val.v.val_str->refcount--; | |
6432 | ||
6f56c055 | 6433 | /* VEC_ordered_remove should help reduce the number of abbrevs |
6434 | that are needed. */ | |
6435 | VEC_ordered_remove (dw_attr_node, die->die_attr, ix); | |
6436 | return; | |
6437 | } | |
e7b3c55c | 6438 | } |
ec1e49cc | 6439 | |
958656b7 | 6440 | /* Remove CHILD from its parent. PREV must have the property that |
6441 | PREV->DIE_SIB == CHILD. Does not alter CHILD. */ | |
2b49746a | 6442 | |
6443 | static void | |
958656b7 | 6444 | remove_child_with_prev (dw_die_ref child, dw_die_ref prev) |
2b49746a | 6445 | { |
958656b7 | 6446 | gcc_assert (child->die_parent == prev->die_parent); |
6447 | gcc_assert (prev->die_sib == child); | |
6448 | if (prev == child) | |
2b49746a | 6449 | { |
958656b7 | 6450 | gcc_assert (child->die_parent->die_child == child); |
6451 | prev = NULL; | |
2b49746a | 6452 | } |
958656b7 | 6453 | else |
6454 | prev->die_sib = child->die_sib; | |
6455 | if (child->die_parent->die_child == child) | |
6456 | child->die_parent->die_child = prev; | |
2b49746a | 6457 | } |
6458 | ||
958656b7 | 6459 | /* Remove child DIE whose die_tag is TAG. Do nothing if no child |
6460 | matches TAG. */ | |
ec1e49cc | 6461 | |
958656b7 | 6462 | static void |
6463 | remove_child_TAG (dw_die_ref die, enum dwarf_tag tag) | |
6464 | { | |
6465 | dw_die_ref c; | |
61a9389f | 6466 | |
958656b7 | 6467 | c = die->die_child; |
6468 | if (c) do { | |
6469 | dw_die_ref prev = c; | |
6470 | c = c->die_sib; | |
6471 | while (c->die_tag == tag) | |
6472 | { | |
6473 | remove_child_with_prev (c, prev); | |
6474 | /* Might have removed every child. */ | |
6475 | if (c == c->die_sib) | |
6476 | return; | |
6477 | c = c->die_sib; | |
6478 | } | |
6479 | } while (c != die->die_child); | |
6480 | } | |
6481 | ||
6482 | /* Add a CHILD_DIE as the last child of DIE. */ | |
6483 | ||
6484 | static void | |
8ec3a57b | 6485 | add_child_die (dw_die_ref die, dw_die_ref child_die) |
8a8bfbe7 | 6486 | { |
958656b7 | 6487 | /* FIXME this should probably be an assert. */ |
6488 | if (! die || ! child_die) | |
6489 | return; | |
6490 | gcc_assert (die != child_die); | |
8c3f468d | 6491 | |
958656b7 | 6492 | child_die->die_parent = die; |
6493 | if (die->die_child) | |
6494 | { | |
6495 | child_die->die_sib = die->die_child->die_sib; | |
6496 | die->die_child->die_sib = child_die; | |
8a8bfbe7 | 6497 | } |
958656b7 | 6498 | else |
6499 | child_die->die_sib = child_die; | |
6500 | die->die_child = child_die; | |
8a8bfbe7 | 6501 | } |
6502 | ||
5134c73b | 6503 | /* Move CHILD, which must be a child of PARENT or the DIE for which PARENT |
61a9389f | 6504 | is the specification, to the end of PARENT's list of children. |
958656b7 | 6505 | This is done by removing and re-adding it. */ |
e7b3c55c | 6506 | |
6507 | static void | |
8ec3a57b | 6508 | splice_child_die (dw_die_ref parent, dw_die_ref child) |
e7b3c55c | 6509 | { |
958656b7 | 6510 | dw_die_ref p; |
e7b3c55c | 6511 | |
6512 | /* We want the declaration DIE from inside the class, not the | |
6513 | specification DIE at toplevel. */ | |
6514 | if (child->die_parent != parent) | |
5134c73b | 6515 | { |
6516 | dw_die_ref tmp = get_AT_ref (child, DW_AT_specification); | |
8c3f468d | 6517 | |
5134c73b | 6518 | if (tmp) |
6519 | child = tmp; | |
6520 | } | |
e7b3c55c | 6521 | |
7bd4f6b6 | 6522 | gcc_assert (child->die_parent == parent |
6523 | || (child->die_parent | |
6524 | == get_AT_ref (parent, DW_AT_specification))); | |
61a9389f | 6525 | |
958656b7 | 6526 | for (p = child->die_parent->die_child; ; p = p->die_sib) |
6527 | if (p->die_sib == child) | |
e7b3c55c | 6528 | { |
958656b7 | 6529 | remove_child_with_prev (child, p); |
e7b3c55c | 6530 | break; |
6531 | } | |
6532 | ||
958656b7 | 6533 | add_child_die (parent, child); |
e7b3c55c | 6534 | } |
6535 | ||
8a8bfbe7 | 6536 | /* Return a pointer to a newly created DIE node. */ |
6537 | ||
6538 | static inline dw_die_ref | |
8ec3a57b | 6539 | new_die (enum dwarf_tag tag_value, dw_die_ref parent_die, tree t) |
8a8bfbe7 | 6540 | { |
2457c754 | 6541 | dw_die_ref die = GGC_CNEW (die_node); |
8a8bfbe7 | 6542 | |
6543 | die->die_tag = tag_value; | |
8a8bfbe7 | 6544 | |
6545 | if (parent_die != NULL) | |
6546 | add_child_die (parent_die, die); | |
6547 | else | |
678d90bb | 6548 | { |
6549 | limbo_die_node *limbo_node; | |
6550 | ||
2457c754 | 6551 | limbo_node = GGC_CNEW (limbo_die_node); |
678d90bb | 6552 | limbo_node->die = die; |
15cfae4e | 6553 | limbo_node->created_for = t; |
678d90bb | 6554 | limbo_node->next = limbo_die_list; |
6555 | limbo_die_list = limbo_node; | |
6556 | } | |
ec1e49cc | 6557 | |
8a8bfbe7 | 6558 | return die; |
6559 | } | |
ec1e49cc | 6560 | |
8a8bfbe7 | 6561 | /* Return the DIE associated with the given type specifier. */ |
ec1e49cc | 6562 | |
8a8bfbe7 | 6563 | static inline dw_die_ref |
8ec3a57b | 6564 | lookup_type_die (tree type) |
8a8bfbe7 | 6565 | { |
1f3233d1 | 6566 | return TYPE_SYMTAB_DIE (type); |
8a8bfbe7 | 6567 | } |
c05d7491 | 6568 | |
8a8bfbe7 | 6569 | /* Equate a DIE to a given type specifier. */ |
ec1e49cc | 6570 | |
e7b3c55c | 6571 | static inline void |
8ec3a57b | 6572 | equate_type_number_to_die (tree type, dw_die_ref type_die) |
8a8bfbe7 | 6573 | { |
1f3233d1 | 6574 | TYPE_SYMTAB_DIE (type) = type_die; |
8a8bfbe7 | 6575 | } |
ec1e49cc | 6576 | |
26863140 | 6577 | /* Returns a hash value for X (which really is a die_struct). */ |
6578 | ||
6579 | static hashval_t | |
6580 | decl_die_table_hash (const void *x) | |
6581 | { | |
c1fdef8e | 6582 | return (hashval_t) ((const_dw_die_ref) x)->decl_id; |
26863140 | 6583 | } |
6584 | ||
6585 | /* Return nonzero if decl_id of die_struct X is the same as UID of decl *Y. */ | |
6586 | ||
6587 | static int | |
6588 | decl_die_table_eq (const void *x, const void *y) | |
6589 | { | |
aae87fc3 | 6590 | return (((const_dw_die_ref) x)->decl_id == DECL_UID ((const_tree) y)); |
26863140 | 6591 | } |
6592 | ||
8a8bfbe7 | 6593 | /* Return the DIE associated with a given declaration. */ |
ec1e49cc | 6594 | |
8a8bfbe7 | 6595 | static inline dw_die_ref |
8ec3a57b | 6596 | lookup_decl_die (tree decl) |
8a8bfbe7 | 6597 | { |
2457c754 | 6598 | return (dw_die_ref) htab_find_with_hash (decl_die_table, decl, DECL_UID (decl)); |
30ade641 | 6599 | } |
6600 | ||
b2025850 | 6601 | /* Returns a hash value for X (which really is a var_loc_list). */ |
6602 | ||
6603 | static hashval_t | |
6604 | decl_loc_table_hash (const void *x) | |
6605 | { | |
6606 | return (hashval_t) ((const var_loc_list *) x)->decl_id; | |
6607 | } | |
6608 | ||
6609 | /* Return nonzero if decl_id of var_loc_list X is the same as | |
6610 | UID of decl *Y. */ | |
6611 | ||
6612 | static int | |
6613 | decl_loc_table_eq (const void *x, const void *y) | |
6614 | { | |
aae87fc3 | 6615 | return (((const var_loc_list *) x)->decl_id == DECL_UID ((const_tree) y)); |
b2025850 | 6616 | } |
6617 | ||
6618 | /* Return the var_loc list associated with a given declaration. */ | |
6619 | ||
6620 | static inline var_loc_list * | |
5493cb9a | 6621 | lookup_decl_loc (const_tree decl) |
b2025850 | 6622 | { |
2457c754 | 6623 | return (var_loc_list *) |
6624 | htab_find_with_hash (decl_loc_table, decl, DECL_UID (decl)); | |
b2025850 | 6625 | } |
6626 | ||
8a8bfbe7 | 6627 | /* Equate a DIE to a particular declaration. */ |
ec1e49cc | 6628 | |
8a8bfbe7 | 6629 | static void |
8ec3a57b | 6630 | equate_decl_number_to_die (tree decl, dw_die_ref decl_die) |
30ade641 | 6631 | { |
dff29840 | 6632 | unsigned int decl_id = DECL_UID (decl); |
26863140 | 6633 | void **slot; |
8a8bfbe7 | 6634 | |
26863140 | 6635 | slot = htab_find_slot_with_hash (decl_die_table, decl, decl_id, INSERT); |
6636 | *slot = decl_die; | |
6637 | decl_die->decl_id = decl_id; | |
30ade641 | 6638 | } |
b2025850 | 6639 | |
6640 | /* Add a variable location node to the linked list for DECL. */ | |
6641 | ||
6642 | static void | |
6643 | add_var_loc_to_decl (tree decl, struct var_loc_node *loc) | |
6644 | { | |
6645 | unsigned int decl_id = DECL_UID (decl); | |
6646 | var_loc_list *temp; | |
6647 | void **slot; | |
6648 | ||
6649 | slot = htab_find_slot_with_hash (decl_loc_table, decl, decl_id, INSERT); | |
6650 | if (*slot == NULL) | |
6651 | { | |
2457c754 | 6652 | temp = GGC_CNEW (var_loc_list); |
b2025850 | 6653 | temp->decl_id = decl_id; |
6654 | *slot = temp; | |
6655 | } | |
6656 | else | |
2457c754 | 6657 | temp = (var_loc_list *) *slot; |
b2025850 | 6658 | |
6659 | if (temp->last) | |
6660 | { | |
6661 | /* If the current location is the same as the end of the list, | |
d53bb226 | 6662 | and either both or neither of the locations is uninitialized, |
b2025850 | 6663 | we have nothing to do. */ |
d53bb226 | 6664 | if ((!rtx_equal_p (NOTE_VAR_LOCATION_LOC (temp->last->var_loc_note), |
6665 | NOTE_VAR_LOCATION_LOC (loc->var_loc_note))) | |
6666 | || ((NOTE_VAR_LOCATION_STATUS (temp->last->var_loc_note) | |
6667 | != NOTE_VAR_LOCATION_STATUS (loc->var_loc_note)) | |
6668 | && ((NOTE_VAR_LOCATION_STATUS (temp->last->var_loc_note) | |
6669 | == VAR_INIT_STATUS_UNINITIALIZED) | |
6670 | || (NOTE_VAR_LOCATION_STATUS (loc->var_loc_note) | |
6671 | == VAR_INIT_STATUS_UNINITIALIZED)))) | |
b2025850 | 6672 | { |
6673 | /* Add LOC to the end of list and update LAST. */ | |
6674 | temp->last->next = loc; | |
6675 | temp->last = loc; | |
6676 | } | |
6677 | } | |
6678 | /* Do not add empty location to the beginning of the list. */ | |
6679 | else if (NOTE_VAR_LOCATION_LOC (loc->var_loc_note) != NULL_RTX) | |
6680 | { | |
6681 | temp->first = loc; | |
6682 | temp->last = loc; | |
6683 | } | |
6684 | } | |
8a8bfbe7 | 6685 | \f |
6686 | /* Keep track of the number of spaces used to indent the | |
6687 | output of the debugging routines that print the structure of | |
6688 | the DIE internal representation. */ | |
6689 | static int print_indent; | |
ec1e49cc | 6690 | |
8a8bfbe7 | 6691 | /* Indent the line the number of spaces given by print_indent. */ |
6692 | ||
6693 | static inline void | |
8ec3a57b | 6694 | print_spaces (FILE *outfile) |
8a8bfbe7 | 6695 | { |
6696 | fprintf (outfile, "%*s", print_indent, ""); | |
30ade641 | 6697 | } |
6698 | ||
ad87de1e | 6699 | /* Print the information associated with a given DIE, and its children. |
8a8bfbe7 | 6700 | This routine is a debugging aid only. */ |
ec1e49cc | 6701 | |
30ade641 | 6702 | static void |
8ec3a57b | 6703 | print_die (dw_die_ref die, FILE *outfile) |
30ade641 | 6704 | { |
19cb6b50 | 6705 | dw_attr_ref a; |
6706 | dw_die_ref c; | |
6f56c055 | 6707 | unsigned ix; |
ec1e49cc | 6708 | |
8a8bfbe7 | 6709 | print_spaces (outfile); |
de064be9 | 6710 | fprintf (outfile, "DIE %4ld: %s\n", |
8a8bfbe7 | 6711 | die->die_offset, dwarf_tag_name (die->die_tag)); |
6712 | print_spaces (outfile); | |
c08e043f | 6713 | fprintf (outfile, " abbrev id: %lu", die->die_abbrev); |
de064be9 | 6714 | fprintf (outfile, " offset: %ld\n", die->die_offset); |
8a8bfbe7 | 6715 | |
6f56c055 | 6716 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, a); ix++) |
30ade641 | 6717 | { |
8a8bfbe7 | 6718 | print_spaces (outfile); |
6719 | fprintf (outfile, " %s: ", dwarf_attr_name (a->dw_attr)); | |
6720 | ||
c90bf86c | 6721 | switch (AT_class (a)) |
8a8bfbe7 | 6722 | { |
6723 | case dw_val_class_addr: | |
6724 | fprintf (outfile, "address"); | |
6725 | break; | |
a36145ca | 6726 | case dw_val_class_offset: |
6727 | fprintf (outfile, "offset"); | |
6728 | break; | |
8a8bfbe7 | 6729 | case dw_val_class_loc: |
6730 | fprintf (outfile, "location descriptor"); | |
6731 | break; | |
4c21a22f | 6732 | case dw_val_class_loc_list: |
a36145ca | 6733 | fprintf (outfile, "location list -> label:%s", |
6734 | AT_loc_list (a)->ll_symbol); | |
4c21a22f | 6735 | break; |
fe39c28c | 6736 | case dw_val_class_range_list: |
6737 | fprintf (outfile, "range list"); | |
6738 | break; | |
8a8bfbe7 | 6739 | case dw_val_class_const: |
3201d6f1 | 6740 | fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, AT_int (a)); |
8a8bfbe7 | 6741 | break; |
6742 | case dw_val_class_unsigned_const: | |
3201d6f1 | 6743 | fprintf (outfile, HOST_WIDE_INT_PRINT_UNSIGNED, AT_unsigned (a)); |
8a8bfbe7 | 6744 | break; |
6745 | case dw_val_class_long_long: | |
c08e043f | 6746 | fprintf (outfile, "constant (%lu,%lu)", |
f80d1bcd | 6747 | a->dw_attr_val.v.val_long_long.hi, |
6748 | a->dw_attr_val.v.val_long_long.low); | |
8a8bfbe7 | 6749 | break; |
1b6ad376 | 6750 | case dw_val_class_vec: |
6751 | fprintf (outfile, "floating-point or vector constant"); | |
8a8bfbe7 | 6752 | break; |
6753 | case dw_val_class_flag: | |
c90bf86c | 6754 | fprintf (outfile, "%u", AT_flag (a)); |
8a8bfbe7 | 6755 | break; |
6756 | case dw_val_class_die_ref: | |
c90bf86c | 6757 | if (AT_ref (a) != NULL) |
19f716e5 | 6758 | { |
eabb26f3 | 6759 | if (AT_ref (a)->die_symbol) |
19f716e5 | 6760 | fprintf (outfile, "die -> label: %s", AT_ref (a)->die_symbol); |
6761 | else | |
de064be9 | 6762 | fprintf (outfile, "die -> %ld", AT_ref (a)->die_offset); |
19f716e5 | 6763 | } |
8a8bfbe7 | 6764 | else |
6765 | fprintf (outfile, "die -> <null>"); | |
6766 | break; | |
6767 | case dw_val_class_lbl_id: | |
d08d29c0 | 6768 | case dw_val_class_lineptr: |
6769 | case dw_val_class_macptr: | |
c90bf86c | 6770 | fprintf (outfile, "label: %s", AT_lbl (a)); |
8a8bfbe7 | 6771 | break; |
8a8bfbe7 | 6772 | case dw_val_class_str: |
c90bf86c | 6773 | if (AT_string (a) != NULL) |
6774 | fprintf (outfile, "\"%s\"", AT_string (a)); | |
8a8bfbe7 | 6775 | else |
6776 | fprintf (outfile, "<null>"); | |
6777 | break; | |
69278c24 | 6778 | case dw_val_class_file: |
6779 | fprintf (outfile, "\"%s\" (%d)", AT_file (a)->filename, | |
6780 | AT_file (a)->emitted_number); | |
6781 | break; | |
0dbd1c74 | 6782 | default: |
6783 | break; | |
8a8bfbe7 | 6784 | } |
6785 | ||
6786 | fprintf (outfile, "\n"); | |
6787 | } | |
6788 | ||
6789 | if (die->die_child != NULL) | |
6790 | { | |
6791 | print_indent += 4; | |
958656b7 | 6792 | FOR_EACH_CHILD (die, c, print_die (c, outfile)); |
8a8bfbe7 | 6793 | print_indent -= 4; |
30ade641 | 6794 | } |
19f716e5 | 6795 | if (print_indent == 0) |
6796 | fprintf (outfile, "\n"); | |
30ade641 | 6797 | } |
6798 | ||
8a8bfbe7 | 6799 | /* Print the contents of the source code line number correspondence table. |
6800 | This routine is a debugging aid only. */ | |
ec1e49cc | 6801 | |
8a8bfbe7 | 6802 | static void |
8ec3a57b | 6803 | print_dwarf_line_table (FILE *outfile) |
30ade641 | 6804 | { |
19cb6b50 | 6805 | unsigned i; |
6806 | dw_line_info_ref line_info; | |
8a8bfbe7 | 6807 | |
6808 | fprintf (outfile, "\n\nDWARF source line information\n"); | |
8c3f468d | 6809 | for (i = 1; i < line_info_table_in_use; i++) |
30ade641 | 6810 | { |
8a8bfbe7 | 6811 | line_info = &line_info_table[i]; |
69278c24 | 6812 | fprintf (outfile, "%5d: %4ld %6ld\n", i, |
6813 | line_info->dw_file_num, | |
6814 | line_info->dw_line_num); | |
30ade641 | 6815 | } |
8a8bfbe7 | 6816 | |
6817 | fprintf (outfile, "\n\n"); | |
7524eb42 | 6818 | } |
6819 | ||
8a8bfbe7 | 6820 | /* Print the information collected for a given DIE. */ |
6821 | ||
6822 | void | |
8ec3a57b | 6823 | debug_dwarf_die (dw_die_ref die) |
8a8bfbe7 | 6824 | { |
6825 | print_die (die, stderr); | |
6826 | } | |
6827 | ||
6828 | /* Print all DWARF information collected for the compilation unit. | |
6829 | This routine is a debugging aid only. */ | |
6830 | ||
6831 | void | |
8ec3a57b | 6832 | debug_dwarf (void) |
8a8bfbe7 | 6833 | { |
6834 | print_indent = 0; | |
6835 | print_die (comp_unit_die, stderr); | |
985956c1 | 6836 | if (! DWARF2_ASM_LINE_DEBUG_INFO) |
6837 | print_dwarf_line_table (stderr); | |
8a8bfbe7 | 6838 | } |
6839 | \f | |
8c3f468d | 6840 | /* Start a new compilation unit DIE for an include file. OLD_UNIT is the CU |
6841 | for the enclosing include file, if any. BINCL_DIE is the DW_TAG_GNU_BINCL | |
6842 | DIE that marks the start of the DIEs for this include file. */ | |
19f716e5 | 6843 | |
6844 | static dw_die_ref | |
8ec3a57b | 6845 | push_new_compile_unit (dw_die_ref old_unit, dw_die_ref bincl_die) |
19f716e5 | 6846 | { |
6847 | const char *filename = get_AT_string (bincl_die, DW_AT_name); | |
6848 | dw_die_ref new_unit = gen_compile_unit_die (filename); | |
8c3f468d | 6849 | |
19f716e5 | 6850 | new_unit->die_sib = old_unit; |
6851 | return new_unit; | |
6852 | } | |
6853 | ||
6854 | /* Close an include-file CU and reopen the enclosing one. */ | |
6855 | ||
6856 | static dw_die_ref | |
8ec3a57b | 6857 | pop_compile_unit (dw_die_ref old_unit) |
19f716e5 | 6858 | { |
6859 | dw_die_ref new_unit = old_unit->die_sib; | |
8c3f468d | 6860 | |
19f716e5 | 6861 | old_unit->die_sib = NULL; |
6862 | return new_unit; | |
6863 | } | |
6864 | ||
8c3f468d | 6865 | #define CHECKSUM(FOO) md5_process_bytes (&(FOO), sizeof (FOO), ctx) |
6866 | #define CHECKSUM_STRING(FOO) md5_process_bytes ((FOO), strlen (FOO), ctx) | |
19f716e5 | 6867 | |
6868 | /* Calculate the checksum of a location expression. */ | |
6869 | ||
6870 | static inline void | |
8ec3a57b | 6871 | loc_checksum (dw_loc_descr_ref loc, struct md5_ctx *ctx) |
19f716e5 | 6872 | { |
8c3f468d | 6873 | CHECKSUM (loc->dw_loc_opc); |
6874 | CHECKSUM (loc->dw_loc_oprnd1); | |
6875 | CHECKSUM (loc->dw_loc_oprnd2); | |
19f716e5 | 6876 | } |
6877 | ||
6878 | /* Calculate the checksum of an attribute. */ | |
6879 | ||
6880 | static void | |
8ec3a57b | 6881 | attr_checksum (dw_attr_ref at, struct md5_ctx *ctx, int *mark) |
19f716e5 | 6882 | { |
6883 | dw_loc_descr_ref loc; | |
6884 | rtx r; | |
6885 | ||
8c3f468d | 6886 | CHECKSUM (at->dw_attr); |
19f716e5 | 6887 | |
69278c24 | 6888 | /* We don't care that this was compiled with a different compiler |
6889 | snapshot; if the output is the same, that's what matters. */ | |
6890 | if (at->dw_attr == DW_AT_producer) | |
19f716e5 | 6891 | return; |
6892 | ||
6893 | switch (AT_class (at)) | |
6894 | { | |
6895 | case dw_val_class_const: | |
8c3f468d | 6896 | CHECKSUM (at->dw_attr_val.v.val_int); |
19f716e5 | 6897 | break; |
6898 | case dw_val_class_unsigned_const: | |
8c3f468d | 6899 | CHECKSUM (at->dw_attr_val.v.val_unsigned); |
19f716e5 | 6900 | break; |
6901 | case dw_val_class_long_long: | |
8c3f468d | 6902 | CHECKSUM (at->dw_attr_val.v.val_long_long); |
19f716e5 | 6903 | break; |
1b6ad376 | 6904 | case dw_val_class_vec: |
6905 | CHECKSUM (at->dw_attr_val.v.val_vec); | |
19f716e5 | 6906 | break; |
6907 | case dw_val_class_flag: | |
8c3f468d | 6908 | CHECKSUM (at->dw_attr_val.v.val_flag); |
19f716e5 | 6909 | break; |
19f716e5 | 6910 | case dw_val_class_str: |
8c3f468d | 6911 | CHECKSUM_STRING (AT_string (at)); |
19f716e5 | 6912 | break; |
a36145ca | 6913 | |
19f716e5 | 6914 | case dw_val_class_addr: |
6915 | r = AT_addr (at); | |
7bd4f6b6 | 6916 | gcc_assert (GET_CODE (r) == SYMBOL_REF); |
6917 | CHECKSUM_STRING (XSTR (r, 0)); | |
19f716e5 | 6918 | break; |
6919 | ||
a36145ca | 6920 | case dw_val_class_offset: |
8c3f468d | 6921 | CHECKSUM (at->dw_attr_val.v.val_offset); |
a36145ca | 6922 | break; |
6923 | ||
19f716e5 | 6924 | case dw_val_class_loc: |
6925 | for (loc = AT_loc (at); loc; loc = loc->dw_loc_next) | |
6926 | loc_checksum (loc, ctx); | |
6927 | break; | |
6928 | ||
6929 | case dw_val_class_die_ref: | |
51e8c210 | 6930 | die_checksum (AT_ref (at), ctx, mark); |
6931 | break; | |
19f716e5 | 6932 | |
6933 | case dw_val_class_fde_ref: | |
6934 | case dw_val_class_lbl_id: | |
d08d29c0 | 6935 | case dw_val_class_lineptr: |
6936 | case dw_val_class_macptr: | |
a36145ca | 6937 | break; |
19f716e5 | 6938 | |
69278c24 | 6939 | case dw_val_class_file: |
6940 | CHECKSUM_STRING (AT_file (at)->filename); | |
6941 | break; | |
6942 | ||
19f716e5 | 6943 | default: |
6944 | break; | |
6945 | } | |
6946 | } | |
6947 | ||
6948 | /* Calculate the checksum of a DIE. */ | |
6949 | ||
6950 | static void | |
8ec3a57b | 6951 | die_checksum (dw_die_ref die, struct md5_ctx *ctx, int *mark) |
19f716e5 | 6952 | { |
6953 | dw_die_ref c; | |
6954 | dw_attr_ref a; | |
6f56c055 | 6955 | unsigned ix; |
19f716e5 | 6956 | |
51e8c210 | 6957 | /* To avoid infinite recursion. */ |
6958 | if (die->die_mark) | |
6959 | { | |
6960 | CHECKSUM (die->die_mark); | |
6961 | return; | |
6962 | } | |
6963 | die->die_mark = ++(*mark); | |
6964 | ||
8c3f468d | 6965 | CHECKSUM (die->die_tag); |
19f716e5 | 6966 | |
6f56c055 | 6967 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, a); ix++) |
51e8c210 | 6968 | attr_checksum (a, ctx, mark); |
19f716e5 | 6969 | |
958656b7 | 6970 | FOR_EACH_CHILD (die, c, die_checksum (c, ctx, mark)); |
19f716e5 | 6971 | } |
6972 | ||
8c3f468d | 6973 | #undef CHECKSUM |
6974 | #undef CHECKSUM_STRING | |
19f716e5 | 6975 | |
51e8c210 | 6976 | /* Do the location expressions look same? */ |
6977 | static inline int | |
8ec3a57b | 6978 | same_loc_p (dw_loc_descr_ref loc1, dw_loc_descr_ref loc2, int *mark) |
51e8c210 | 6979 | { |
6980 | return loc1->dw_loc_opc == loc2->dw_loc_opc | |
6981 | && same_dw_val_p (&loc1->dw_loc_oprnd1, &loc2->dw_loc_oprnd1, mark) | |
6982 | && same_dw_val_p (&loc1->dw_loc_oprnd2, &loc2->dw_loc_oprnd2, mark); | |
6983 | } | |
6984 | ||
6985 | /* Do the values look the same? */ | |
6986 | static int | |
5493cb9a | 6987 | same_dw_val_p (const dw_val_node *v1, const dw_val_node *v2, int *mark) |
51e8c210 | 6988 | { |
6989 | dw_loc_descr_ref loc1, loc2; | |
6990 | rtx r1, r2; | |
51e8c210 | 6991 | |
6992 | if (v1->val_class != v2->val_class) | |
6993 | return 0; | |
6994 | ||
6995 | switch (v1->val_class) | |
6996 | { | |
6997 | case dw_val_class_const: | |
6998 | return v1->v.val_int == v2->v.val_int; | |
6999 | case dw_val_class_unsigned_const: | |
7000 | return v1->v.val_unsigned == v2->v.val_unsigned; | |
7001 | case dw_val_class_long_long: | |
7002 | return v1->v.val_long_long.hi == v2->v.val_long_long.hi | |
c83a163c | 7003 | && v1->v.val_long_long.low == v2->v.val_long_long.low; |
1b6ad376 | 7004 | case dw_val_class_vec: |
7005 | if (v1->v.val_vec.length != v2->v.val_vec.length | |
7006 | || v1->v.val_vec.elt_size != v2->v.val_vec.elt_size) | |
7007 | return 0; | |
7008 | if (memcmp (v1->v.val_vec.array, v2->v.val_vec.array, | |
7009 | v1->v.val_vec.length * v1->v.val_vec.elt_size)) | |
51e8c210 | 7010 | return 0; |
51e8c210 | 7011 | return 1; |
7012 | case dw_val_class_flag: | |
7013 | return v1->v.val_flag == v2->v.val_flag; | |
7014 | case dw_val_class_str: | |
573aba85 | 7015 | return !strcmp(v1->v.val_str->str, v2->v.val_str->str); |
51e8c210 | 7016 | |
7017 | case dw_val_class_addr: | |
7018 | r1 = v1->v.val_addr; | |
7019 | r2 = v2->v.val_addr; | |
7020 | if (GET_CODE (r1) != GET_CODE (r2)) | |
7021 | return 0; | |
7bd4f6b6 | 7022 | gcc_assert (GET_CODE (r1) == SYMBOL_REF); |
7023 | return !strcmp (XSTR (r1, 0), XSTR (r2, 0)); | |
51e8c210 | 7024 | |
7025 | case dw_val_class_offset: | |
7026 | return v1->v.val_offset == v2->v.val_offset; | |
7027 | ||
7028 | case dw_val_class_loc: | |
7029 | for (loc1 = v1->v.val_loc, loc2 = v2->v.val_loc; | |
7030 | loc1 && loc2; | |
7031 | loc1 = loc1->dw_loc_next, loc2 = loc2->dw_loc_next) | |
7032 | if (!same_loc_p (loc1, loc2, mark)) | |
7033 | return 0; | |
7034 | return !loc1 && !loc2; | |
7035 | ||
7036 | case dw_val_class_die_ref: | |
7037 | return same_die_p (v1->v.val_die_ref.die, v2->v.val_die_ref.die, mark); | |
7038 | ||
7039 | case dw_val_class_fde_ref: | |
7040 | case dw_val_class_lbl_id: | |
d08d29c0 | 7041 | case dw_val_class_lineptr: |
7042 | case dw_val_class_macptr: | |
51e8c210 | 7043 | return 1; |
7044 | ||
69278c24 | 7045 | case dw_val_class_file: |
7046 | return v1->v.val_file == v2->v.val_file; | |
7047 | ||
51e8c210 | 7048 | default: |
7049 | return 1; | |
7050 | } | |
7051 | } | |
7052 | ||
7053 | /* Do the attributes look the same? */ | |
7054 | ||
7055 | static int | |
8ec3a57b | 7056 | same_attr_p (dw_attr_ref at1, dw_attr_ref at2, int *mark) |
51e8c210 | 7057 | { |
7058 | if (at1->dw_attr != at2->dw_attr) | |
7059 | return 0; | |
7060 | ||
69278c24 | 7061 | /* We don't care that this was compiled with a different compiler |
7062 | snapshot; if the output is the same, that's what matters. */ | |
7063 | if (at1->dw_attr == DW_AT_producer) | |
51e8c210 | 7064 | return 1; |
7065 | ||
7066 | return same_dw_val_p (&at1->dw_attr_val, &at2->dw_attr_val, mark); | |
7067 | } | |
7068 | ||
7069 | /* Do the dies look the same? */ | |
7070 | ||
7071 | static int | |
8ec3a57b | 7072 | same_die_p (dw_die_ref die1, dw_die_ref die2, int *mark) |
51e8c210 | 7073 | { |
7074 | dw_die_ref c1, c2; | |
6f56c055 | 7075 | dw_attr_ref a1; |
7076 | unsigned ix; | |
51e8c210 | 7077 | |
7078 | /* To avoid infinite recursion. */ | |
7079 | if (die1->die_mark) | |
7080 | return die1->die_mark == die2->die_mark; | |
7081 | die1->die_mark = die2->die_mark = ++(*mark); | |
7082 | ||
7083 | if (die1->die_tag != die2->die_tag) | |
7084 | return 0; | |
7085 | ||
6f56c055 | 7086 | if (VEC_length (dw_attr_node, die1->die_attr) |
7087 | != VEC_length (dw_attr_node, die2->die_attr)) | |
51e8c210 | 7088 | return 0; |
61a9389f | 7089 | |
6f56c055 | 7090 | for (ix = 0; VEC_iterate (dw_attr_node, die1->die_attr, ix, a1); ix++) |
7091 | if (!same_attr_p (a1, VEC_index (dw_attr_node, die2->die_attr, ix), mark)) | |
7092 | return 0; | |
51e8c210 | 7093 | |
958656b7 | 7094 | c1 = die1->die_child; |
7095 | c2 = die2->die_child; | |
7096 | if (! c1) | |
7097 | { | |
7098 | if (c2) | |
7099 | return 0; | |
7100 | } | |
7101 | else | |
7102 | for (;;) | |
7103 | { | |
7104 | if (!same_die_p (c1, c2, mark)) | |
7105 | return 0; | |
7106 | c1 = c1->die_sib; | |
7107 | c2 = c2->die_sib; | |
7108 | if (c1 == die1->die_child) | |
7109 | { | |
7110 | if (c2 == die2->die_child) | |
7111 | break; | |
7112 | else | |
7113 | return 0; | |
7114 | } | |
7115 | } | |
51e8c210 | 7116 | |
7117 | return 1; | |
7118 | } | |
7119 | ||
7120 | /* Do the dies look the same? Wrapper around same_die_p. */ | |
7121 | ||
7122 | static int | |
8ec3a57b | 7123 | same_die_p_wrap (dw_die_ref die1, dw_die_ref die2) |
51e8c210 | 7124 | { |
7125 | int mark = 0; | |
7126 | int ret = same_die_p (die1, die2, &mark); | |
7127 | ||
7128 | unmark_all_dies (die1); | |
7129 | unmark_all_dies (die2); | |
7130 | ||
7131 | return ret; | |
7132 | } | |
7133 | ||
19f716e5 | 7134 | /* The prefix to attach to symbols on DIEs in the current comdat debug |
7135 | info section. */ | |
7136 | static char *comdat_symbol_id; | |
7137 | ||
7138 | /* The index of the current symbol within the current comdat CU. */ | |
7139 | static unsigned int comdat_symbol_number; | |
7140 | ||
7141 | /* Calculate the MD5 checksum of the compilation unit DIE UNIT_DIE and its | |
7142 | children, and set comdat_symbol_id accordingly. */ | |
7143 | ||
7144 | static void | |
8ec3a57b | 7145 | compute_section_prefix (dw_die_ref unit_die) |
19f716e5 | 7146 | { |
51e8c210 | 7147 | const char *die_name = get_AT_string (unit_die, DW_AT_name); |
7148 | const char *base = die_name ? lbasename (die_name) : "anonymous"; | |
2457c754 | 7149 | char *name = XALLOCAVEC (char, strlen (base) + 64); |
90f973ed | 7150 | char *p; |
51e8c210 | 7151 | int i, mark; |
19f716e5 | 7152 | unsigned char checksum[16]; |
7153 | struct md5_ctx ctx; | |
7154 | ||
90f973ed | 7155 | /* Compute the checksum of the DIE, then append part of it as hex digits to |
7156 | the name filename of the unit. */ | |
7157 | ||
19f716e5 | 7158 | md5_init_ctx (&ctx); |
51e8c210 | 7159 | mark = 0; |
7160 | die_checksum (unit_die, &ctx, &mark); | |
7161 | unmark_all_dies (unit_die); | |
19f716e5 | 7162 | md5_finish_ctx (&ctx, checksum); |
7163 | ||
93d164ee | 7164 | sprintf (name, "%s.", base); |
19f716e5 | 7165 | clean_symbol_name (name); |
7166 | ||
8c3f468d | 7167 | p = name + strlen (name); |
7168 | for (i = 0; i < 4; i++) | |
7169 | { | |
7170 | sprintf (p, "%.2x", checksum[i]); | |
7171 | p += 2; | |
7172 | } | |
19f716e5 | 7173 | |
7174 | comdat_symbol_id = unit_die->die_symbol = xstrdup (name); | |
7175 | comdat_symbol_number = 0; | |
7176 | } | |
7177 | ||
90f973ed | 7178 | /* Returns nonzero if DIE represents a type, in the sense of TYPE_P. */ |
19f716e5 | 7179 | |
7180 | static int | |
8ec3a57b | 7181 | is_type_die (dw_die_ref die) |
19f716e5 | 7182 | { |
7183 | switch (die->die_tag) | |
7184 | { | |
7185 | case DW_TAG_array_type: | |
7186 | case DW_TAG_class_type: | |
03a61d93 | 7187 | case DW_TAG_interface_type: |
19f716e5 | 7188 | case DW_TAG_enumeration_type: |
7189 | case DW_TAG_pointer_type: | |
7190 | case DW_TAG_reference_type: | |
7191 | case DW_TAG_string_type: | |
7192 | case DW_TAG_structure_type: | |
7193 | case DW_TAG_subroutine_type: | |
7194 | case DW_TAG_union_type: | |
7195 | case DW_TAG_ptr_to_member_type: | |
7196 | case DW_TAG_set_type: | |
7197 | case DW_TAG_subrange_type: | |
7198 | case DW_TAG_base_type: | |
7199 | case DW_TAG_const_type: | |
7200 | case DW_TAG_file_type: | |
7201 | case DW_TAG_packed_type: | |
7202 | case DW_TAG_volatile_type: | |
51e8c210 | 7203 | case DW_TAG_typedef: |
19f716e5 | 7204 | return 1; |
7205 | default: | |
7206 | return 0; | |
7207 | } | |
7208 | } | |
7209 | ||
7210 | /* Returns 1 iff C is the sort of DIE that should go into a COMDAT CU. | |
7211 | Basically, we want to choose the bits that are likely to be shared between | |
7212 | compilations (types) and leave out the bits that are specific to individual | |
7213 | compilations (functions). */ | |
7214 | ||
7215 | static int | |
8ec3a57b | 7216 | is_comdat_die (dw_die_ref c) |
19f716e5 | 7217 | { |
8c3f468d | 7218 | /* I think we want to leave base types and __vtbl_ptr_type in the main CU, as |
7219 | we do for stabs. The advantage is a greater likelihood of sharing between | |
7220 | objects that don't include headers in the same order (and therefore would | |
7221 | put the base types in a different comdat). jason 8/28/00 */ | |
7222 | ||
19f716e5 | 7223 | if (c->die_tag == DW_TAG_base_type) |
7224 | return 0; | |
7225 | ||
7226 | if (c->die_tag == DW_TAG_pointer_type | |
7227 | || c->die_tag == DW_TAG_reference_type | |
7228 | || c->die_tag == DW_TAG_const_type | |
7229 | || c->die_tag == DW_TAG_volatile_type) | |
7230 | { | |
7231 | dw_die_ref t = get_AT_ref (c, DW_AT_type); | |
8c3f468d | 7232 | |
19f716e5 | 7233 | return t ? is_comdat_die (t) : 0; |
7234 | } | |
19f716e5 | 7235 | |
7236 | return is_type_die (c); | |
7237 | } | |
7238 | ||
7239 | /* Returns 1 iff C is the sort of DIE that might be referred to from another | |
7240 | compilation unit. */ | |
7241 | ||
7242 | static int | |
8ec3a57b | 7243 | is_symbol_die (dw_die_ref c) |
19f716e5 | 7244 | { |
8c3f468d | 7245 | return (is_type_die (c) |
bc70bd5e | 7246 | || (get_AT (c, DW_AT_declaration) |
8462b107 | 7247 | && !get_AT (c, DW_AT_specification)) |
df4d540f | 7248 | || c->die_tag == DW_TAG_namespace |
7249 | || c->die_tag == DW_TAG_module); | |
19f716e5 | 7250 | } |
7251 | ||
7252 | static char * | |
8ec3a57b | 7253 | gen_internal_sym (const char *prefix) |
19f716e5 | 7254 | { |
7255 | char buf[256]; | |
8c3f468d | 7256 | |
4c21a22f | 7257 | ASM_GENERATE_INTERNAL_LABEL (buf, prefix, label_num++); |
19f716e5 | 7258 | return xstrdup (buf); |
7259 | } | |
7260 | ||
7261 | /* Assign symbols to all worthy DIEs under DIE. */ | |
7262 | ||
7263 | static void | |
8ec3a57b | 7264 | assign_symbol_names (dw_die_ref die) |
19f716e5 | 7265 | { |
19cb6b50 | 7266 | dw_die_ref c; |
19f716e5 | 7267 | |
7268 | if (is_symbol_die (die)) | |
7269 | { | |
7270 | if (comdat_symbol_id) | |
7271 | { | |
2457c754 | 7272 | char *p = XALLOCAVEC (char, strlen (comdat_symbol_id) + 64); |
8c3f468d | 7273 | |
19f716e5 | 7274 | sprintf (p, "%s.%s.%x", DIE_LABEL_PREFIX, |
7275 | comdat_symbol_id, comdat_symbol_number++); | |
7276 | die->die_symbol = xstrdup (p); | |
7277 | } | |
7278 | else | |
4c21a22f | 7279 | die->die_symbol = gen_internal_sym ("LDIE"); |
19f716e5 | 7280 | } |
7281 | ||
958656b7 | 7282 | FOR_EACH_CHILD (die, c, assign_symbol_names (c)); |
19f716e5 | 7283 | } |
7284 | ||
51e8c210 | 7285 | struct cu_hash_table_entry |
7286 | { | |
7287 | dw_die_ref cu; | |
7288 | unsigned min_comdat_num, max_comdat_num; | |
7289 | struct cu_hash_table_entry *next; | |
7290 | }; | |
7291 | ||
7292 | /* Routines to manipulate hash table of CUs. */ | |
7293 | static hashval_t | |
8ec3a57b | 7294 | htab_cu_hash (const void *of) |
51e8c210 | 7295 | { |
2457c754 | 7296 | const struct cu_hash_table_entry *const entry = |
7297 | (const struct cu_hash_table_entry *) of; | |
51e8c210 | 7298 | |
7299 | return htab_hash_string (entry->cu->die_symbol); | |
7300 | } | |
7301 | ||
7302 | static int | |
8ec3a57b | 7303 | htab_cu_eq (const void *of1, const void *of2) |
51e8c210 | 7304 | { |
2457c754 | 7305 | const struct cu_hash_table_entry *const entry1 = |
7306 | (const struct cu_hash_table_entry *) of1; | |
7307 | const struct die_struct *const entry2 = (const struct die_struct *) of2; | |
51e8c210 | 7308 | |
7309 | return !strcmp (entry1->cu->die_symbol, entry2->die_symbol); | |
7310 | } | |
7311 | ||
7312 | static void | |
8ec3a57b | 7313 | htab_cu_del (void *what) |
51e8c210 | 7314 | { |
2457c754 | 7315 | struct cu_hash_table_entry *next, |
7316 | *entry = (struct cu_hash_table_entry *) what; | |
51e8c210 | 7317 | |
7318 | while (entry) | |
7319 | { | |
7320 | next = entry->next; | |
7321 | free (entry); | |
7322 | entry = next; | |
7323 | } | |
7324 | } | |
7325 | ||
7326 | /* Check whether we have already seen this CU and set up SYM_NUM | |
7327 | accordingly. */ | |
7328 | static int | |
8ec3a57b | 7329 | check_duplicate_cu (dw_die_ref cu, htab_t htable, unsigned int *sym_num) |
51e8c210 | 7330 | { |
7331 | struct cu_hash_table_entry dummy; | |
7332 | struct cu_hash_table_entry **slot, *entry, *last = &dummy; | |
7333 | ||
7334 | dummy.max_comdat_num = 0; | |
7335 | ||
7336 | slot = (struct cu_hash_table_entry **) | |
7337 | htab_find_slot_with_hash (htable, cu, htab_hash_string (cu->die_symbol), | |
7338 | INSERT); | |
7339 | entry = *slot; | |
7340 | ||
7341 | for (; entry; last = entry, entry = entry->next) | |
7342 | { | |
7343 | if (same_die_p_wrap (cu, entry->cu)) | |
7344 | break; | |
7345 | } | |
7346 | ||
7347 | if (entry) | |
7348 | { | |
7349 | *sym_num = entry->min_comdat_num; | |
7350 | return 1; | |
7351 | } | |
7352 | ||
4c36ffe6 | 7353 | entry = XCNEW (struct cu_hash_table_entry); |
51e8c210 | 7354 | entry->cu = cu; |
7355 | entry->min_comdat_num = *sym_num = last->max_comdat_num; | |
7356 | entry->next = *slot; | |
7357 | *slot = entry; | |
7358 | ||
7359 | return 0; | |
7360 | } | |
7361 | ||
7362 | /* Record SYM_NUM to record of CU in HTABLE. */ | |
7363 | static void | |
8ec3a57b | 7364 | record_comdat_symbol_number (dw_die_ref cu, htab_t htable, unsigned int sym_num) |
51e8c210 | 7365 | { |
7366 | struct cu_hash_table_entry **slot, *entry; | |
7367 | ||
7368 | slot = (struct cu_hash_table_entry **) | |
7369 | htab_find_slot_with_hash (htable, cu, htab_hash_string (cu->die_symbol), | |
7370 | NO_INSERT); | |
7371 | entry = *slot; | |
7372 | ||
7373 | entry->max_comdat_num = sym_num; | |
7374 | } | |
7375 | ||
19f716e5 | 7376 | /* Traverse the DIE (which is always comp_unit_die), and set up |
7377 | additional compilation units for each of the include files we see | |
7378 | bracketed by BINCL/EINCL. */ | |
7379 | ||
7380 | static void | |
8ec3a57b | 7381 | break_out_includes (dw_die_ref die) |
19f716e5 | 7382 | { |
958656b7 | 7383 | dw_die_ref c; |
19cb6b50 | 7384 | dw_die_ref unit = NULL; |
51e8c210 | 7385 | limbo_die_node *node, **pnode; |
7386 | htab_t cu_hash_table; | |
19f716e5 | 7387 | |
958656b7 | 7388 | c = die->die_child; |
7389 | if (c) do { | |
7390 | dw_die_ref prev = c; | |
7391 | c = c->die_sib; | |
7392 | while (c->die_tag == DW_TAG_GNU_BINCL || c->die_tag == DW_TAG_GNU_EINCL | |
7393 | || (unit && is_comdat_die (c))) | |
7394 | { | |
7395 | dw_die_ref next = c->die_sib; | |
7396 | ||
7397 | /* This DIE is for a secondary CU; remove it from the main one. */ | |
7398 | remove_child_with_prev (c, prev); | |
61a9389f | 7399 | |
958656b7 | 7400 | if (c->die_tag == DW_TAG_GNU_BINCL) |
7401 | unit = push_new_compile_unit (unit, c); | |
7402 | else if (c->die_tag == DW_TAG_GNU_EINCL) | |
7403 | unit = pop_compile_unit (unit); | |
7404 | else | |
7405 | add_child_die (unit, c); | |
7406 | c = next; | |
7407 | if (c == die->die_child) | |
7408 | break; | |
7409 | } | |
7410 | } while (c != die->die_child); | |
19f716e5 | 7411 | |
7412 | #if 0 | |
7413 | /* We can only use this in debugging, since the frontend doesn't check | |
ac02093f | 7414 | to make sure that we leave every include file we enter. */ |
7bd4f6b6 | 7415 | gcc_assert (!unit); |
19f716e5 | 7416 | #endif |
7417 | ||
7418 | assign_symbol_names (die); | |
51e8c210 | 7419 | cu_hash_table = htab_create (10, htab_cu_hash, htab_cu_eq, htab_cu_del); |
7420 | for (node = limbo_die_list, pnode = &limbo_die_list; | |
7421 | node; | |
7422 | node = node->next) | |
19f716e5 | 7423 | { |
51e8c210 | 7424 | int is_dupl; |
7425 | ||
19f716e5 | 7426 | compute_section_prefix (node->die); |
51e8c210 | 7427 | is_dupl = check_duplicate_cu (node->die, cu_hash_table, |
7428 | &comdat_symbol_number); | |
19f716e5 | 7429 | assign_symbol_names (node->die); |
51e8c210 | 7430 | if (is_dupl) |
7431 | *pnode = node->next; | |
7432 | else | |
c83a163c | 7433 | { |
51e8c210 | 7434 | pnode = &node->next; |
7435 | record_comdat_symbol_number (node->die, cu_hash_table, | |
7436 | comdat_symbol_number); | |
7437 | } | |
19f716e5 | 7438 | } |
51e8c210 | 7439 | htab_delete (cu_hash_table); |
19f716e5 | 7440 | } |
7441 | ||
7442 | /* Traverse the DIE and add a sibling attribute if it may have the | |
7443 | effect of speeding up access to siblings. To save some space, | |
7444 | avoid generating sibling attributes for DIE's without children. */ | |
7445 | ||
7446 | static void | |
8ec3a57b | 7447 | add_sibling_attributes (dw_die_ref die) |
19f716e5 | 7448 | { |
19cb6b50 | 7449 | dw_die_ref c; |
19f716e5 | 7450 | |
958656b7 | 7451 | if (! die->die_child) |
7452 | return; | |
7453 | ||
7454 | if (die->die_parent && die != die->die_parent->die_child) | |
4b72e226 | 7455 | add_AT_die_ref (die, DW_AT_sibling, die->die_sib); |
7456 | ||
958656b7 | 7457 | FOR_EACH_CHILD (die, c, add_sibling_attributes (c)); |
4b72e226 | 7458 | } |
7459 | ||
8c3f468d | 7460 | /* Output all location lists for the DIE and its children. */ |
7461 | ||
4c21a22f | 7462 | static void |
8ec3a57b | 7463 | output_location_lists (dw_die_ref die) |
4c21a22f | 7464 | { |
7465 | dw_die_ref c; | |
6f56c055 | 7466 | dw_attr_ref a; |
7467 | unsigned ix; | |
8c3f468d | 7468 | |
6f56c055 | 7469 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, a); ix++) |
7470 | if (AT_class (a) == dw_val_class_loc_list) | |
7471 | output_loc_list (AT_loc_list (a)); | |
8c3f468d | 7472 | |
958656b7 | 7473 | FOR_EACH_CHILD (die, c, output_location_lists (c)); |
4c21a22f | 7474 | } |
bc70bd5e | 7475 | |
8c3f468d | 7476 | /* The format of each DIE (and its attribute value pairs) is encoded in an |
7477 | abbreviation table. This routine builds the abbreviation table and assigns | |
7478 | a unique abbreviation id for each abbreviation entry. The children of each | |
7479 | die are visited recursively. */ | |
4b72e226 | 7480 | |
7481 | static void | |
8ec3a57b | 7482 | build_abbrev_table (dw_die_ref die) |
4b72e226 | 7483 | { |
19cb6b50 | 7484 | unsigned long abbrev_id; |
7485 | unsigned int n_alloc; | |
7486 | dw_die_ref c; | |
6f56c055 | 7487 | dw_attr_ref a; |
7488 | unsigned ix; | |
19f716e5 | 7489 | |
7490 | /* Scan the DIE references, and mark as external any that refer to | |
eabb26f3 | 7491 | DIEs from other CUs (i.e. those which are not marked). */ |
6f56c055 | 7492 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, a); ix++) |
7493 | if (AT_class (a) == dw_val_class_die_ref | |
7494 | && AT_ref (a)->die_mark == 0) | |
8c3f468d | 7495 | { |
6f56c055 | 7496 | gcc_assert (AT_ref (a)->die_symbol); |
8c3f468d | 7497 | |
6f56c055 | 7498 | set_AT_ref_external (a, 1); |
8c3f468d | 7499 | } |
19f716e5 | 7500 | |
4b72e226 | 7501 | for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id) |
7502 | { | |
19cb6b50 | 7503 | dw_die_ref abbrev = abbrev_die_table[abbrev_id]; |
6f56c055 | 7504 | dw_attr_ref die_a, abbrev_a; |
7505 | unsigned ix; | |
7506 | bool ok = true; | |
61a9389f | 7507 | |
6f56c055 | 7508 | if (abbrev->die_tag != die->die_tag) |
7509 | continue; | |
7510 | if ((abbrev->die_child != NULL) != (die->die_child != NULL)) | |
7511 | continue; | |
61a9389f | 7512 | |
6f56c055 | 7513 | if (VEC_length (dw_attr_node, abbrev->die_attr) |
7514 | != VEC_length (dw_attr_node, die->die_attr)) | |
7515 | continue; | |
61a9389f | 7516 | |
6f56c055 | 7517 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, die_a); ix++) |
4b72e226 | 7518 | { |
6f56c055 | 7519 | abbrev_a = VEC_index (dw_attr_node, abbrev->die_attr, ix); |
7520 | if ((abbrev_a->dw_attr != die_a->dw_attr) | |
7521 | || (value_format (abbrev_a) != value_format (die_a))) | |
4b72e226 | 7522 | { |
6f56c055 | 7523 | ok = false; |
7524 | break; | |
4b72e226 | 7525 | } |
7526 | } | |
6f56c055 | 7527 | if (ok) |
7528 | break; | |
4b72e226 | 7529 | } |
7530 | ||
7531 | if (abbrev_id >= abbrev_die_table_in_use) | |
7532 | { | |
7533 | if (abbrev_die_table_in_use >= abbrev_die_table_allocated) | |
7534 | { | |
7535 | n_alloc = abbrev_die_table_allocated + ABBREV_DIE_TABLE_INCREMENT; | |
2457c754 | 7536 | abbrev_die_table = GGC_RESIZEVEC (dw_die_ref, abbrev_die_table, |
7537 | n_alloc); | |
4b72e226 | 7538 | |
f0af5a88 | 7539 | memset (&abbrev_die_table[abbrev_die_table_allocated], 0, |
4b72e226 | 7540 | (n_alloc - abbrev_die_table_allocated) * sizeof (dw_die_ref)); |
7541 | abbrev_die_table_allocated = n_alloc; | |
7542 | } | |
7543 | ||
7544 | ++abbrev_die_table_in_use; | |
7545 | abbrev_die_table[abbrev_id] = die; | |
7546 | } | |
7547 | ||
7548 | die->die_abbrev = abbrev_id; | |
958656b7 | 7549 | FOR_EACH_CHILD (die, c, build_abbrev_table (c)); |
4b72e226 | 7550 | } |
7551 | \f | |
8a8bfbe7 | 7552 | /* Return the power-of-two number of bytes necessary to represent VALUE. */ |
7553 | ||
7554 | static int | |
d6d5e57f | 7555 | constant_size (unsigned HOST_WIDE_INT value) |
8a8bfbe7 | 7556 | { |
7557 | int log; | |
7558 | ||
7559 | if (value == 0) | |
7560 | log = 0; | |
30ade641 | 7561 | else |
8a8bfbe7 | 7562 | log = floor_log2 (value); |
ec1e49cc | 7563 | |
8a8bfbe7 | 7564 | log = log / 8; |
7565 | log = 1 << (floor_log2 (log) + 1); | |
7566 | ||
7567 | return log; | |
30ade641 | 7568 | } |
7569 | ||
8c3f468d | 7570 | /* Return the size of a DIE as it is represented in the |
8a8bfbe7 | 7571 | .debug_info section. */ |
ec1e49cc | 7572 | |
8a8bfbe7 | 7573 | static unsigned long |
8ec3a57b | 7574 | size_of_die (dw_die_ref die) |
30ade641 | 7575 | { |
19cb6b50 | 7576 | unsigned long size = 0; |
7577 | dw_attr_ref a; | |
6f56c055 | 7578 | unsigned ix; |
ec1e49cc | 7579 | |
8a8bfbe7 | 7580 | size += size_of_uleb128 (die->die_abbrev); |
6f56c055 | 7581 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, a); ix++) |
30ade641 | 7582 | { |
c90bf86c | 7583 | switch (AT_class (a)) |
30ade641 | 7584 | { |
7585 | case dw_val_class_addr: | |
aaa408cd | 7586 | size += DWARF2_ADDR_SIZE; |
30ade641 | 7587 | break; |
a36145ca | 7588 | case dw_val_class_offset: |
7589 | size += DWARF_OFFSET_SIZE; | |
7590 | break; | |
30ade641 | 7591 | case dw_val_class_loc: |
8a8bfbe7 | 7592 | { |
19cb6b50 | 7593 | unsigned long lsize = size_of_locs (AT_loc (a)); |
ec1e49cc | 7594 | |
8a8bfbe7 | 7595 | /* Block length. */ |
7596 | size += constant_size (lsize); | |
7597 | size += lsize; | |
7598 | } | |
30ade641 | 7599 | break; |
4c21a22f | 7600 | case dw_val_class_loc_list: |
7601 | size += DWARF_OFFSET_SIZE; | |
7602 | break; | |
fe39c28c | 7603 | case dw_val_class_range_list: |
7604 | size += DWARF_OFFSET_SIZE; | |
7605 | break; | |
30ade641 | 7606 | case dw_val_class_const: |
fddebe76 | 7607 | size += size_of_sleb128 (AT_int (a)); |
30ade641 | 7608 | break; |
7609 | case dw_val_class_unsigned_const: | |
c90bf86c | 7610 | size += constant_size (AT_unsigned (a)); |
30ade641 | 7611 | break; |
df78b73b | 7612 | case dw_val_class_long_long: |
ca98eb0a | 7613 | size += 1 + 2*HOST_BITS_PER_LONG/HOST_BITS_PER_CHAR; /* block */ |
df78b73b | 7614 | break; |
1b6ad376 | 7615 | case dw_val_class_vec: |
2eb674c9 | 7616 | size += constant_size (a->dw_attr_val.v.val_vec.length |
7617 | * a->dw_attr_val.v.val_vec.elt_size) | |
7618 | + a->dw_attr_val.v.val_vec.length | |
7619 | * a->dw_attr_val.v.val_vec.elt_size; /* block */ | |
30ade641 | 7620 | break; |
7621 | case dw_val_class_flag: | |
8a8bfbe7 | 7622 | size += 1; |
30ade641 | 7623 | break; |
7624 | case dw_val_class_die_ref: | |
1ef5e659 | 7625 | if (AT_ref_external (a)) |
7626 | size += DWARF2_ADDR_SIZE; | |
7627 | else | |
7628 | size += DWARF_OFFSET_SIZE; | |
30ade641 | 7629 | break; |
7630 | case dw_val_class_fde_ref: | |
8a8bfbe7 | 7631 | size += DWARF_OFFSET_SIZE; |
30ade641 | 7632 | break; |
7633 | case dw_val_class_lbl_id: | |
aaa408cd | 7634 | size += DWARF2_ADDR_SIZE; |
8a8bfbe7 | 7635 | break; |
d08d29c0 | 7636 | case dw_val_class_lineptr: |
7637 | case dw_val_class_macptr: | |
8a8bfbe7 | 7638 | size += DWARF_OFFSET_SIZE; |
7639 | break; | |
7640 | case dw_val_class_str: | |
80b7bd06 | 7641 | if (AT_string_form (a) == DW_FORM_strp) |
7642 | size += DWARF_OFFSET_SIZE; | |
7643 | else | |
573aba85 | 7644 | size += strlen (a->dw_attr_val.v.val_str->str) + 1; |
8a8bfbe7 | 7645 | break; |
69278c24 | 7646 | case dw_val_class_file: |
7647 | size += constant_size (maybe_emit_file (a->dw_attr_val.v.val_file)); | |
7648 | break; | |
8a8bfbe7 | 7649 | default: |
7bd4f6b6 | 7650 | gcc_unreachable (); |
8a8bfbe7 | 7651 | } |
30ade641 | 7652 | } |
8a8bfbe7 | 7653 | |
7654 | return size; | |
30ade641 | 7655 | } |
7656 | ||
8c3f468d | 7657 | /* Size the debugging information associated with a given DIE. Visits the |
7658 | DIE's children recursively. Updates the global variable next_die_offset, on | |
7659 | each time through. Uses the current value of next_die_offset to update the | |
7660 | die_offset field in each DIE. */ | |
ec1e49cc | 7661 | |
30ade641 | 7662 | static void |
8ec3a57b | 7663 | calc_die_sizes (dw_die_ref die) |
30ade641 | 7664 | { |
19cb6b50 | 7665 | dw_die_ref c; |
8c3f468d | 7666 | |
8a8bfbe7 | 7667 | die->die_offset = next_die_offset; |
7668 | next_die_offset += size_of_die (die); | |
ec1e49cc | 7669 | |
958656b7 | 7670 | FOR_EACH_CHILD (die, c, calc_die_sizes (c)); |
ec1e49cc | 7671 | |
8a8bfbe7 | 7672 | if (die->die_child != NULL) |
7673 | /* Count the null byte used to terminate sibling lists. */ | |
7674 | next_die_offset += 1; | |
30ade641 | 7675 | } |
7676 | ||
eabb26f3 | 7677 | /* Set the marks for a die and its children. We do this so |
19f716e5 | 7678 | that we know whether or not a reference needs to use FORM_ref_addr; only |
eabb26f3 | 7679 | DIEs in the same CU will be marked. We used to clear out the offset |
7680 | and use that as the flag, but ran into ordering problems. */ | |
19f716e5 | 7681 | |
7682 | static void | |
8ec3a57b | 7683 | mark_dies (dw_die_ref die) |
19f716e5 | 7684 | { |
19cb6b50 | 7685 | dw_die_ref c; |
8c3f468d | 7686 | |
7bd4f6b6 | 7687 | gcc_assert (!die->die_mark); |
8ec3a57b | 7688 | |
eabb26f3 | 7689 | die->die_mark = 1; |
958656b7 | 7690 | FOR_EACH_CHILD (die, c, mark_dies (c)); |
eabb26f3 | 7691 | } |
7692 | ||
7693 | /* Clear the marks for a die and its children. */ | |
7694 | ||
7695 | static void | |
8ec3a57b | 7696 | unmark_dies (dw_die_ref die) |
eabb26f3 | 7697 | { |
19cb6b50 | 7698 | dw_die_ref c; |
8c3f468d | 7699 | |
7bd4f6b6 | 7700 | gcc_assert (die->die_mark); |
8ec3a57b | 7701 | |
eabb26f3 | 7702 | die->die_mark = 0; |
958656b7 | 7703 | FOR_EACH_CHILD (die, c, unmark_dies (c)); |
19f716e5 | 7704 | } |
7705 | ||
51e8c210 | 7706 | /* Clear the marks for a die, its children and referred dies. */ |
7707 | ||
7708 | static void | |
8ec3a57b | 7709 | unmark_all_dies (dw_die_ref die) |
51e8c210 | 7710 | { |
7711 | dw_die_ref c; | |
7712 | dw_attr_ref a; | |
6f56c055 | 7713 | unsigned ix; |
51e8c210 | 7714 | |
7715 | if (!die->die_mark) | |
7716 | return; | |
7717 | die->die_mark = 0; | |
7718 | ||
958656b7 | 7719 | FOR_EACH_CHILD (die, c, unmark_all_dies (c)); |
51e8c210 | 7720 | |
6f56c055 | 7721 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, a); ix++) |
51e8c210 | 7722 | if (AT_class (a) == dw_val_class_die_ref) |
7723 | unmark_all_dies (AT_ref (a)); | |
7724 | } | |
7725 | ||
61a9389f | 7726 | /* Return the size of the .debug_pubnames or .debug_pubtypes table |
af84796a | 7727 | generated for the compilation unit. */ |
6efd403b | 7728 | |
8a8bfbe7 | 7729 | static unsigned long |
af84796a | 7730 | size_of_pubnames (VEC (pubname_entry, gc) * names) |
6efd403b | 7731 | { |
19cb6b50 | 7732 | unsigned long size; |
7733 | unsigned i; | |
af84796a | 7734 | pubname_ref p; |
df78b73b | 7735 | |
8a8bfbe7 | 7736 | size = DWARF_PUBNAMES_HEADER_SIZE; |
af84796a | 7737 | for (i = 0; VEC_iterate (pubname_entry, names, i, p); i++) |
7738 | if (names != pubtype_table | |
7739 | || p->die->die_offset != 0 | |
7740 | || !flag_eliminate_unused_debug_types) | |
7741 | size += strlen (p->name) + DWARF_OFFSET_SIZE + 1; | |
6efd403b | 7742 | |
8a8bfbe7 | 7743 | size += DWARF_OFFSET_SIZE; |
7744 | return size; | |
6efd403b | 7745 | } |
7746 | ||
ad87de1e | 7747 | /* Return the size of the information in the .debug_aranges section. */ |
df78b73b | 7748 | |
8a8bfbe7 | 7749 | static unsigned long |
8ec3a57b | 7750 | size_of_aranges (void) |
df78b73b | 7751 | { |
19cb6b50 | 7752 | unsigned long size; |
df78b73b | 7753 | |
8a8bfbe7 | 7754 | size = DWARF_ARANGES_HEADER_SIZE; |
df78b73b | 7755 | |
8a8bfbe7 | 7756 | /* Count the address/length pair for this compilation unit. */ |
d6de7df9 | 7757 | if (text_section_used) |
7758 | size += 2 * DWARF2_ADDR_SIZE; | |
7759 | if (cold_text_section_used) | |
7760 | size += 2 * DWARF2_ADDR_SIZE; | |
aaa408cd | 7761 | size += 2 * DWARF2_ADDR_SIZE * arange_table_in_use; |
df78b73b | 7762 | |
8a8bfbe7 | 7763 | /* Count the two zero words used to terminated the address range table. */ |
aaa408cd | 7764 | size += 2 * DWARF2_ADDR_SIZE; |
8a8bfbe7 | 7765 | return size; |
7766 | } | |
7767 | \f | |
7768 | /* Select the encoding of an attribute value. */ | |
7769 | ||
7770 | static enum dwarf_form | |
8ec3a57b | 7771 | value_format (dw_attr_ref a) |
8a8bfbe7 | 7772 | { |
c90bf86c | 7773 | switch (a->dw_attr_val.val_class) |
df78b73b | 7774 | { |
8a8bfbe7 | 7775 | case dw_val_class_addr: |
7776 | return DW_FORM_addr; | |
fe39c28c | 7777 | case dw_val_class_range_list: |
a36145ca | 7778 | case dw_val_class_offset: |
04da8de9 | 7779 | case dw_val_class_loc_list: |
7bd4f6b6 | 7780 | switch (DWARF_OFFSET_SIZE) |
7781 | { | |
7782 | case 4: | |
7783 | return DW_FORM_data4; | |
7784 | case 8: | |
7785 | return DW_FORM_data8; | |
7786 | default: | |
7787 | gcc_unreachable (); | |
7788 | } | |
8a8bfbe7 | 7789 | case dw_val_class_loc: |
c90bf86c | 7790 | switch (constant_size (size_of_locs (AT_loc (a)))) |
df78b73b | 7791 | { |
8a8bfbe7 | 7792 | case 1: |
7793 | return DW_FORM_block1; | |
7794 | case 2: | |
7795 | return DW_FORM_block2; | |
df78b73b | 7796 | default: |
7bd4f6b6 | 7797 | gcc_unreachable (); |
df78b73b | 7798 | } |
8a8bfbe7 | 7799 | case dw_val_class_const: |
fddebe76 | 7800 | return DW_FORM_sdata; |
8a8bfbe7 | 7801 | case dw_val_class_unsigned_const: |
c90bf86c | 7802 | switch (constant_size (AT_unsigned (a))) |
8a8bfbe7 | 7803 | { |
7804 | case 1: | |
7805 | return DW_FORM_data1; | |
7806 | case 2: | |
7807 | return DW_FORM_data2; | |
7808 | case 4: | |
7809 | return DW_FORM_data4; | |
7810 | case 8: | |
7811 | return DW_FORM_data8; | |
7812 | default: | |
7bd4f6b6 | 7813 | gcc_unreachable (); |
8a8bfbe7 | 7814 | } |
7815 | case dw_val_class_long_long: | |
7816 | return DW_FORM_block1; | |
1b6ad376 | 7817 | case dw_val_class_vec: |
2eb674c9 | 7818 | switch (constant_size (a->dw_attr_val.v.val_vec.length |
7819 | * a->dw_attr_val.v.val_vec.elt_size)) | |
7820 | { | |
7821 | case 1: | |
7822 | return DW_FORM_block1; | |
7823 | case 2: | |
7824 | return DW_FORM_block2; | |
7825 | case 4: | |
7826 | return DW_FORM_block4; | |
7827 | default: | |
7828 | gcc_unreachable (); | |
7829 | } | |
8a8bfbe7 | 7830 | case dw_val_class_flag: |
7831 | return DW_FORM_flag; | |
7832 | case dw_val_class_die_ref: | |
19f716e5 | 7833 | if (AT_ref_external (a)) |
7834 | return DW_FORM_ref_addr; | |
7835 | else | |
7836 | return DW_FORM_ref; | |
8a8bfbe7 | 7837 | case dw_val_class_fde_ref: |
7838 | return DW_FORM_data; | |
7839 | case dw_val_class_lbl_id: | |
7840 | return DW_FORM_addr; | |
d08d29c0 | 7841 | case dw_val_class_lineptr: |
7842 | case dw_val_class_macptr: | |
8a8bfbe7 | 7843 | return DW_FORM_data; |
7844 | case dw_val_class_str: | |
80b7bd06 | 7845 | return AT_string_form (a); |
69278c24 | 7846 | case dw_val_class_file: |
7847 | switch (constant_size (maybe_emit_file (a->dw_attr_val.v.val_file))) | |
7848 | { | |
7849 | case 1: | |
7850 | return DW_FORM_data1; | |
7851 | case 2: | |
7852 | return DW_FORM_data2; | |
7853 | case 4: | |
7854 | return DW_FORM_data4; | |
7855 | default: | |
7856 | gcc_unreachable (); | |
7857 | } | |
a36145ca | 7858 | |
df78b73b | 7859 | default: |
7bd4f6b6 | 7860 | gcc_unreachable (); |
df78b73b | 7861 | } |
6efd403b | 7862 | } |
7863 | ||
8a8bfbe7 | 7864 | /* Output the encoding of an attribute value. */ |
df78b73b | 7865 | |
8a8bfbe7 | 7866 | static void |
8ec3a57b | 7867 | output_value_format (dw_attr_ref a) |
6efd403b | 7868 | { |
c90bf86c | 7869 | enum dwarf_form form = value_format (a); |
8c3f468d | 7870 | |
ca98eb0a | 7871 | dw2_asm_output_data_uleb128 (form, "(%s)", dwarf_form_name (form)); |
8a8bfbe7 | 7872 | } |
df78b73b | 7873 | |
8a8bfbe7 | 7874 | /* Output the .debug_abbrev section which defines the DIE abbreviation |
7875 | table. */ | |
df78b73b | 7876 | |
8a8bfbe7 | 7877 | static void |
8ec3a57b | 7878 | output_abbrev_section (void) |
8a8bfbe7 | 7879 | { |
7880 | unsigned long abbrev_id; | |
ec1e49cc | 7881 | |
8a8bfbe7 | 7882 | for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id) |
7883 | { | |
19cb6b50 | 7884 | dw_die_ref abbrev = abbrev_die_table[abbrev_id]; |
6f56c055 | 7885 | unsigned ix; |
7886 | dw_attr_ref a_attr; | |
ec1e49cc | 7887 | |
ca98eb0a | 7888 | dw2_asm_output_data_uleb128 (abbrev_id, "(abbrev code)"); |
ca98eb0a | 7889 | dw2_asm_output_data_uleb128 (abbrev->die_tag, "(TAG: %s)", |
7890 | dwarf_tag_name (abbrev->die_tag)); | |
ec1e49cc | 7891 | |
ca98eb0a | 7892 | if (abbrev->die_child != NULL) |
7893 | dw2_asm_output_data (1, DW_children_yes, "DW_children_yes"); | |
7894 | else | |
7895 | dw2_asm_output_data (1, DW_children_no, "DW_children_no"); | |
8a8bfbe7 | 7896 | |
6f56c055 | 7897 | for (ix = 0; VEC_iterate (dw_attr_node, abbrev->die_attr, ix, a_attr); |
7898 | ix++) | |
8a8bfbe7 | 7899 | { |
ca98eb0a | 7900 | dw2_asm_output_data_uleb128 (a_attr->dw_attr, "(%s)", |
7901 | dwarf_attr_name (a_attr->dw_attr)); | |
c90bf86c | 7902 | output_value_format (a_attr); |
df78b73b | 7903 | } |
df78b73b | 7904 | |
ca98eb0a | 7905 | dw2_asm_output_data (1, 0, NULL); |
7906 | dw2_asm_output_data (1, 0, NULL); | |
df78b73b | 7907 | } |
dd198c78 | 7908 | |
7909 | /* Terminate the table. */ | |
ca98eb0a | 7910 | dw2_asm_output_data (1, 0, NULL); |
6efd403b | 7911 | } |
7912 | ||
19f716e5 | 7913 | /* Output a symbol we can use to refer to this DIE from another CU. */ |
7914 | ||
7915 | static inline void | |
8ec3a57b | 7916 | output_die_symbol (dw_die_ref die) |
19f716e5 | 7917 | { |
7918 | char *sym = die->die_symbol; | |
7919 | ||
7920 | if (sym == 0) | |
7921 | return; | |
7922 | ||
7923 | if (strncmp (sym, DIE_LABEL_PREFIX, sizeof (DIE_LABEL_PREFIX) - 1) == 0) | |
7924 | /* We make these global, not weak; if the target doesn't support | |
7925 | .linkonce, it doesn't support combining the sections, so debugging | |
7926 | will break. */ | |
883b2e73 | 7927 | targetm.asm_out.globalize_label (asm_out_file, sym); |
8c3f468d | 7928 | |
19f716e5 | 7929 | ASM_OUTPUT_LABEL (asm_out_file, sym); |
7930 | } | |
7931 | ||
1d340a5e | 7932 | /* Return a new location list, given the begin and end range, and the |
8c3f468d | 7933 | expression. gensym tells us whether to generate a new internal symbol for |
7934 | this location list node, which is done for the head of the list only. */ | |
7935 | ||
1d340a5e | 7936 | static inline dw_loc_list_ref |
8ec3a57b | 7937 | new_loc_list (dw_loc_descr_ref expr, const char *begin, const char *end, |
7938 | const char *section, unsigned int gensym) | |
1d340a5e | 7939 | { |
2457c754 | 7940 | dw_loc_list_ref retlist = GGC_CNEW (dw_loc_list_node); |
8c3f468d | 7941 | |
1d340a5e | 7942 | retlist->begin = begin; |
7943 | retlist->end = end; | |
7944 | retlist->expr = expr; | |
7945 | retlist->section = section; | |
bc70bd5e | 7946 | if (gensym) |
1d340a5e | 7947 | retlist->ll_symbol = gen_internal_sym ("LLST"); |
8c3f468d | 7948 | |
1d340a5e | 7949 | return retlist; |
7950 | } | |
7951 | ||
2358393e | 7952 | /* Add a location description expression to a location list. */ |
8c3f468d | 7953 | |
1d340a5e | 7954 | static inline void |
8ec3a57b | 7955 | add_loc_descr_to_loc_list (dw_loc_list_ref *list_head, dw_loc_descr_ref descr, |
7956 | const char *begin, const char *end, | |
7957 | const char *section) | |
1d340a5e | 7958 | { |
19cb6b50 | 7959 | dw_loc_list_ref *d; |
bc70bd5e | 7960 | |
6312a35e | 7961 | /* Find the end of the chain. */ |
1d340a5e | 7962 | for (d = list_head; (*d) != NULL; d = &(*d)->dw_loc_next) |
7963 | ; | |
8c3f468d | 7964 | |
2358393e | 7965 | /* Add a new location list node to the list. */ |
1d340a5e | 7966 | *d = new_loc_list (descr, begin, end, section, 0); |
7967 | } | |
7968 | ||
2358393e | 7969 | /* Output the location list given to us. */ |
8c3f468d | 7970 | |
4c21a22f | 7971 | static void |
8ec3a57b | 7972 | output_loc_list (dw_loc_list_ref list_head) |
4c21a22f | 7973 | { |
8c3f468d | 7974 | dw_loc_list_ref curr = list_head; |
7975 | ||
4c21a22f | 7976 | ASM_OUTPUT_LABEL (asm_out_file, list_head->ll_symbol); |
a36145ca | 7977 | |
71c23453 | 7978 | /* Walk the location list, and output each range + expression. */ |
bc70bd5e | 7979 | for (curr = list_head; curr != NULL; curr = curr->dw_loc_next) |
4c21a22f | 7980 | { |
fe39c28c | 7981 | unsigned long size; |
d53bb226 | 7982 | /* Don't output an entry that starts and ends at the same address. */ |
7983 | if (strcmp (curr->begin, curr->end) == 0) | |
7984 | continue; | |
dae1861f | 7985 | if (!have_multiple_function_sections) |
71c23453 | 7986 | { |
7987 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, curr->begin, curr->section, | |
7988 | "Location list begin address (%s)", | |
7989 | list_head->ll_symbol); | |
7990 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, curr->end, curr->section, | |
7991 | "Location list end address (%s)", | |
7992 | list_head->ll_symbol); | |
7993 | } | |
7994 | else | |
7995 | { | |
7996 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, curr->begin, | |
7997 | "Location list begin address (%s)", | |
7998 | list_head->ll_symbol); | |
7999 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, curr->end, | |
8000 | "Location list end address (%s)", | |
8001 | list_head->ll_symbol); | |
8002 | } | |
4c21a22f | 8003 | size = size_of_locs (curr->expr); |
bc70bd5e | 8004 | |
4c21a22f | 8005 | /* Output the block length for this list of location operations. */ |
7bd4f6b6 | 8006 | gcc_assert (size <= 0xffff); |
fe39c28c | 8007 | dw2_asm_output_data (2, size, "%s", "Location expression size"); |
8008 | ||
4c21a22f | 8009 | output_loc_sequence (curr->expr); |
8010 | } | |
8c3f468d | 8011 | |
71c23453 | 8012 | dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, |
ec98ecf4 | 8013 | "Location list terminator begin (%s)", |
8014 | list_head->ll_symbol); | |
71c23453 | 8015 | dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, |
ec98ecf4 | 8016 | "Location list terminator end (%s)", |
8017 | list_head->ll_symbol); | |
4c21a22f | 8018 | } |
80b7bd06 | 8019 | |
8a8bfbe7 | 8020 | /* Output the DIE and its attributes. Called recursively to generate |
8021 | the definitions of each child DIE. */ | |
ec1e49cc | 8022 | |
30ade641 | 8023 | static void |
8ec3a57b | 8024 | output_die (dw_die_ref die) |
30ade641 | 8025 | { |
19cb6b50 | 8026 | dw_attr_ref a; |
8027 | dw_die_ref c; | |
8028 | unsigned long size; | |
6f56c055 | 8029 | unsigned ix; |
6efd403b | 8030 | |
19f716e5 | 8031 | /* If someone in another CU might refer to us, set up a symbol for |
8032 | them to point to. */ | |
8033 | if (die->die_symbol) | |
8034 | output_die_symbol (die); | |
8035 | ||
ca98eb0a | 8036 | dw2_asm_output_data_uleb128 (die->die_abbrev, "(DIE (0x%lx) %s)", |
de064be9 | 8037 | (unsigned long)die->die_offset, |
8038 | dwarf_tag_name (die->die_tag)); | |
6efd403b | 8039 | |
6f56c055 | 8040 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, a); ix++) |
30ade641 | 8041 | { |
ca98eb0a | 8042 | const char *name = dwarf_attr_name (a->dw_attr); |
8043 | ||
c90bf86c | 8044 | switch (AT_class (a)) |
8a8bfbe7 | 8045 | { |
8046 | case dw_val_class_addr: | |
ca98eb0a | 8047 | dw2_asm_output_addr_rtx (DWARF2_ADDR_SIZE, AT_addr (a), "%s", name); |
8a8bfbe7 | 8048 | break; |
30ade641 | 8049 | |
a36145ca | 8050 | case dw_val_class_offset: |
8051 | dw2_asm_output_data (DWARF_OFFSET_SIZE, a->dw_attr_val.v.val_offset, | |
8052 | "%s", name); | |
8053 | break; | |
8054 | ||
fe39c28c | 8055 | case dw_val_class_range_list: |
8056 | { | |
8057 | char *p = strchr (ranges_section_label, '\0'); | |
8058 | ||
3201d6f1 | 8059 | sprintf (p, "+" HOST_WIDE_INT_PRINT_HEX, |
8060 | a->dw_attr_val.v.val_offset); | |
fe39c28c | 8061 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, ranges_section_label, |
d08d29c0 | 8062 | debug_ranges_section, "%s", name); |
fe39c28c | 8063 | *p = '\0'; |
8064 | } | |
8065 | break; | |
8066 | ||
8a8bfbe7 | 8067 | case dw_val_class_loc: |
c90bf86c | 8068 | size = size_of_locs (AT_loc (a)); |
ec1e49cc | 8069 | |
8a8bfbe7 | 8070 | /* Output the block length for this list of location operations. */ |
ca98eb0a | 8071 | dw2_asm_output_data (constant_size (size), size, "%s", name); |
ec1e49cc | 8072 | |
4b72e226 | 8073 | output_loc_sequence (AT_loc (a)); |
30ade641 | 8074 | break; |
8a8bfbe7 | 8075 | |
8076 | case dw_val_class_const: | |
fddebe76 | 8077 | /* ??? It would be slightly more efficient to use a scheme like is |
8078 | used for unsigned constants below, but gdb 4.x does not sign | |
8079 | extend. Gdb 5.x does sign extend. */ | |
ca98eb0a | 8080 | dw2_asm_output_data_sleb128 (AT_int (a), "%s", name); |
30ade641 | 8081 | break; |
8a8bfbe7 | 8082 | |
8083 | case dw_val_class_unsigned_const: | |
ca98eb0a | 8084 | dw2_asm_output_data (constant_size (AT_unsigned (a)), |
8085 | AT_unsigned (a), "%s", name); | |
30ade641 | 8086 | break; |
8a8bfbe7 | 8087 | |
8088 | case dw_val_class_long_long: | |
ca98eb0a | 8089 | { |
8090 | unsigned HOST_WIDE_INT first, second; | |
8a8bfbe7 | 8091 | |
8c3f468d | 8092 | dw2_asm_output_data (1, |
8093 | 2 * HOST_BITS_PER_LONG / HOST_BITS_PER_CHAR, | |
bc70bd5e | 8094 | "%s", name); |
f80d1bcd | 8095 | |
ca98eb0a | 8096 | if (WORDS_BIG_ENDIAN) |
8097 | { | |
8098 | first = a->dw_attr_val.v.val_long_long.hi; | |
8099 | second = a->dw_attr_val.v.val_long_long.low; | |
8100 | } | |
8101 | else | |
8102 | { | |
8103 | first = a->dw_attr_val.v.val_long_long.low; | |
8104 | second = a->dw_attr_val.v.val_long_long.hi; | |
8105 | } | |
8c3f468d | 8106 | |
8107 | dw2_asm_output_data (HOST_BITS_PER_LONG / HOST_BITS_PER_CHAR, | |
ca98eb0a | 8108 | first, "long long constant"); |
8c3f468d | 8109 | dw2_asm_output_data (HOST_BITS_PER_LONG / HOST_BITS_PER_CHAR, |
ca98eb0a | 8110 | second, NULL); |
8111 | } | |
30ade641 | 8112 | break; |
8a8bfbe7 | 8113 | |
1b6ad376 | 8114 | case dw_val_class_vec: |
57380eb2 | 8115 | { |
1b6ad376 | 8116 | unsigned int elt_size = a->dw_attr_val.v.val_vec.elt_size; |
8117 | unsigned int len = a->dw_attr_val.v.val_vec.length; | |
19cb6b50 | 8118 | unsigned int i; |
1b6ad376 | 8119 | unsigned char *p; |
57380eb2 | 8120 | |
2eb674c9 | 8121 | dw2_asm_output_data (constant_size (len * elt_size), |
8122 | len * elt_size, "%s", name); | |
1b6ad376 | 8123 | if (elt_size > sizeof (HOST_WIDE_INT)) |
8124 | { | |
8125 | elt_size /= 2; | |
8126 | len *= 2; | |
8127 | } | |
8128 | for (i = 0, p = a->dw_attr_val.v.val_vec.array; | |
8129 | i < len; | |
8130 | i++, p += elt_size) | |
8131 | dw2_asm_output_data (elt_size, extract_int (p, elt_size), | |
8132 | "fp or vector constant word %u", i); | |
f80d1bcd | 8133 | break; |
57380eb2 | 8134 | } |
8a8bfbe7 | 8135 | |
8136 | case dw_val_class_flag: | |
ca98eb0a | 8137 | dw2_asm_output_data (1, AT_flag (a), "%s", name); |
30ade641 | 8138 | break; |
a36145ca | 8139 | |
bc70bd5e | 8140 | case dw_val_class_loc_list: |
4c21a22f | 8141 | { |
8142 | char *sym = AT_loc_list (a)->ll_symbol; | |
8c3f468d | 8143 | |
7bd4f6b6 | 8144 | gcc_assert (sym); |
d08d29c0 | 8145 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, sym, debug_loc_section, |
8146 | "%s", name); | |
4c21a22f | 8147 | } |
8148 | break; | |
a36145ca | 8149 | |
8a8bfbe7 | 8150 | case dw_val_class_die_ref: |
19f716e5 | 8151 | if (AT_ref_external (a)) |
ca98eb0a | 8152 | { |
8153 | char *sym = AT_ref (a)->die_symbol; | |
8c3f468d | 8154 | |
7bd4f6b6 | 8155 | gcc_assert (sym); |
d08d29c0 | 8156 | dw2_asm_output_offset (DWARF2_ADDR_SIZE, sym, debug_info_section, |
8157 | "%s", name); | |
ca98eb0a | 8158 | } |
19f716e5 | 8159 | else |
7bd4f6b6 | 8160 | { |
8161 | gcc_assert (AT_ref (a)->die_offset); | |
8162 | dw2_asm_output_data (DWARF_OFFSET_SIZE, AT_ref (a)->die_offset, | |
8163 | "%s", name); | |
8164 | } | |
30ade641 | 8165 | break; |
8a8bfbe7 | 8166 | |
8167 | case dw_val_class_fde_ref: | |
19bce576 | 8168 | { |
8169 | char l1[20]; | |
8c3f468d | 8170 | |
ca98eb0a | 8171 | ASM_GENERATE_INTERNAL_LABEL (l1, FDE_LABEL, |
8172 | a->dw_attr_val.v.val_fde_index * 2); | |
d08d29c0 | 8173 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, l1, debug_frame_section, |
8174 | "%s", name); | |
19bce576 | 8175 | } |
30ade641 | 8176 | break; |
30ade641 | 8177 | |
8a8bfbe7 | 8178 | case dw_val_class_lbl_id: |
19e5668c | 8179 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, AT_lbl (a), "%s", name); |
8a8bfbe7 | 8180 | break; |
ec1e49cc | 8181 | |
d08d29c0 | 8182 | case dw_val_class_lineptr: |
8183 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, AT_lbl (a), | |
8184 | debug_line_section, "%s", name); | |
8185 | break; | |
8186 | ||
8187 | case dw_val_class_macptr: | |
8188 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, AT_lbl (a), | |
8189 | debug_macinfo_section, "%s", name); | |
8a8bfbe7 | 8190 | break; |
30ade641 | 8191 | |
8a8bfbe7 | 8192 | case dw_val_class_str: |
80b7bd06 | 8193 | if (AT_string_form (a) == DW_FORM_strp) |
8194 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, | |
8195 | a->dw_attr_val.v.val_str->label, | |
d08d29c0 | 8196 | debug_str_section, |
895ecd4c | 8197 | "%s: \"%s\"", name, AT_string (a)); |
80b7bd06 | 8198 | else |
8199 | dw2_asm_output_nstring (AT_string (a), -1, "%s", name); | |
8a8bfbe7 | 8200 | break; |
840b696a | 8201 | |
69278c24 | 8202 | case dw_val_class_file: |
8203 | { | |
8204 | int f = maybe_emit_file (a->dw_attr_val.v.val_file); | |
61a9389f | 8205 | |
69278c24 | 8206 | dw2_asm_output_data (constant_size (f), f, "%s (%s)", name, |
8207 | a->dw_attr_val.v.val_file->filename); | |
8208 | break; | |
8209 | } | |
8210 | ||
8a8bfbe7 | 8211 | default: |
7bd4f6b6 | 8212 | gcc_unreachable (); |
8a8bfbe7 | 8213 | } |
8a8bfbe7 | 8214 | } |
ec1e49cc | 8215 | |
958656b7 | 8216 | FOR_EACH_CHILD (die, c, output_die (c)); |
ec1e49cc | 8217 | |
8c3f468d | 8218 | /* Add null byte to terminate sibling list. */ |
8a8bfbe7 | 8219 | if (die->die_child != NULL) |
8c3f468d | 8220 | dw2_asm_output_data (1, 0, "end of children of DIE 0x%lx", |
de064be9 | 8221 | (unsigned long) die->die_offset); |
8a8bfbe7 | 8222 | } |
ec1e49cc | 8223 | |
8a8bfbe7 | 8224 | /* Output the compilation unit that appears at the beginning of the |
8225 | .debug_info section, and precedes the DIE descriptions. */ | |
ec1e49cc | 8226 | |
8a8bfbe7 | 8227 | static void |
8ec3a57b | 8228 | output_compilation_unit_header (void) |
8a8bfbe7 | 8229 | { |
65bdc57c | 8230 | if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4) |
8231 | dw2_asm_output_data (4, 0xffffffff, | |
8232 | "Initial length escape value indicating 64-bit DWARF extension"); | |
8233 | dw2_asm_output_data (DWARF_OFFSET_SIZE, | |
61a9389f | 8234 | next_die_offset - DWARF_INITIAL_LENGTH_SIZE, |
ca98eb0a | 8235 | "Length of Compilation Unit Info"); |
ca98eb0a | 8236 | dw2_asm_output_data (2, DWARF_VERSION, "DWARF version number"); |
ca98eb0a | 8237 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, abbrev_section_label, |
d08d29c0 | 8238 | debug_abbrev_section, |
ca98eb0a | 8239 | "Offset Into Abbrev. Section"); |
ca98eb0a | 8240 | dw2_asm_output_data (1, DWARF2_ADDR_SIZE, "Pointer Size (in bytes)"); |
30ade641 | 8241 | } |
8242 | ||
19f716e5 | 8243 | /* Output the compilation unit DIE and its children. */ |
8244 | ||
8245 | static void | |
8ec3a57b | 8246 | output_comp_unit (dw_die_ref die, int output_if_empty) |
19f716e5 | 8247 | { |
dd9977e9 | 8248 | const char *secname; |
51e8c210 | 8249 | char *oldsym, *tmp; |
8250 | ||
8251 | /* Unless we are outputting main CU, we may throw away empty ones. */ | |
8252 | if (!output_if_empty && die->die_child == NULL) | |
8253 | return; | |
19f716e5 | 8254 | |
8c3f468d | 8255 | /* Even if there are no children of this DIE, we must output the information |
8256 | about the compilation unit. Otherwise, on an empty translation unit, we | |
8257 | will generate a present, but empty, .debug_info section. IRIX 6.5 `nm' | |
8258 | will then complain when examining the file. First mark all the DIEs in | |
8259 | this CU so we know which get local refs. */ | |
eabb26f3 | 8260 | mark_dies (die); |
8261 | ||
8262 | build_abbrev_table (die); | |
8263 | ||
1e625a2e | 8264 | /* Initialize the beginning DIE offset - and calculate sizes/offsets. */ |
19f716e5 | 8265 | next_die_offset = DWARF_COMPILE_UNIT_HEADER_SIZE; |
8266 | calc_die_sizes (die); | |
8267 | ||
51e8c210 | 8268 | oldsym = die->die_symbol; |
8269 | if (oldsym) | |
19f716e5 | 8270 | { |
2457c754 | 8271 | tmp = XALLOCAVEC (char, strlen (oldsym) + 24); |
8c3f468d | 8272 | |
51e8c210 | 8273 | sprintf (tmp, ".gnu.linkonce.wi.%s", oldsym); |
dd9977e9 | 8274 | secname = tmp; |
19f716e5 | 8275 | die->die_symbol = NULL; |
2f14b1f9 | 8276 | switch_to_section (get_section (secname, SECTION_DEBUG, NULL)); |
19f716e5 | 8277 | } |
8278 | else | |
2f14b1f9 | 8279 | switch_to_section (debug_info_section); |
19f716e5 | 8280 | |
8281 | /* Output debugging information. */ | |
19f716e5 | 8282 | output_compilation_unit_header (); |
8283 | output_die (die); | |
8284 | ||
eabb26f3 | 8285 | /* Leave the marks on the main CU, so we can check them in |
8286 | output_pubnames. */ | |
51e8c210 | 8287 | if (oldsym) |
8288 | { | |
8289 | unmark_dies (die); | |
8290 | die->die_symbol = oldsym; | |
8291 | } | |
19f716e5 | 8292 | } |
8293 | ||
7d709201 | 8294 | /* Return the DWARF2/3 pubname associated with a decl. */ |
59561872 | 8295 | |
7795e5d1 | 8296 | static const char * |
8ec3a57b | 8297 | dwarf2_name (tree decl, int scope) |
59561872 | 8298 | { |
7d709201 | 8299 | return lang_hooks.dwarf_name (decl, scope ? 1 : 0); |
59561872 | 8300 | } |
8301 | ||
dc7a29ce | 8302 | /* Add a new entry to .debug_pubnames if appropriate. */ |
ec1e49cc | 8303 | |
dc7a29ce | 8304 | static void |
a12691f0 | 8305 | add_pubname_string (const char *str, dw_die_ref die) |
dc7a29ce | 8306 | { |
af84796a | 8307 | pubname_entry e; |
dc7a29ce | 8308 | |
af84796a | 8309 | e.die = die; |
a12691f0 | 8310 | e.name = xstrdup (str); |
af84796a | 8311 | VEC_safe_push (pubname_entry, gc, pubname_table, &e); |
8312 | } | |
8313 | ||
a12691f0 | 8314 | static void |
8315 | add_pubname (tree decl, dw_die_ref die) | |
8316 | { | |
8317 | ||
8318 | if (TREE_PUBLIC (decl)) | |
8319 | add_pubname_string (dwarf2_name (decl, 1), die); | |
8320 | } | |
8321 | ||
af84796a | 8322 | /* Add a new entry to .debug_pubtypes if appropriate. */ |
8323 | ||
8324 | static void | |
8325 | add_pubtype (tree decl, dw_die_ref die) | |
8326 | { | |
8327 | pubname_entry e; | |
8328 | ||
8329 | e.name = NULL; | |
8330 | if ((TREE_PUBLIC (decl) | |
8331 | || die->die_parent == comp_unit_die) | |
8332 | && (die->die_tag == DW_TAG_typedef || COMPLETE_TYPE_P (decl))) | |
dc7a29ce | 8333 | { |
af84796a | 8334 | e.die = die; |
8335 | if (TYPE_P (decl)) | |
8336 | { | |
8337 | if (TYPE_NAME (decl)) | |
8338 | { | |
8339 | if (TREE_CODE (TYPE_NAME (decl)) == IDENTIFIER_NODE) | |
52570507 | 8340 | e.name = IDENTIFIER_POINTER (TYPE_NAME (decl)); |
af84796a | 8341 | else if (TREE_CODE (TYPE_NAME (decl)) == TYPE_DECL |
8342 | && DECL_NAME (TYPE_NAME (decl))) | |
52570507 | 8343 | e.name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (decl))); |
61a9389f | 8344 | else |
af84796a | 8345 | e.name = xstrdup ((const char *) get_AT_string (die, DW_AT_name)); |
8346 | } | |
8347 | } | |
61a9389f | 8348 | else |
af84796a | 8349 | e.name = xstrdup (dwarf2_name (decl, 1)); |
ec1e49cc | 8350 | |
af84796a | 8351 | /* If we don't have a name for the type, there's no point in adding |
8352 | it to the table. */ | |
8353 | if (e.name && e.name[0] != '\0') | |
8354 | VEC_safe_push (pubname_entry, gc, pubtype_table, &e); | |
8355 | } | |
dc7a29ce | 8356 | } |
8357 | ||
30ade641 | 8358 | /* Output the public names table used to speed up access to externally |
af84796a | 8359 | visible names; or the public types table used to find type definitions. */ |
ec1e49cc | 8360 | |
30ade641 | 8361 | static void |
af84796a | 8362 | output_pubnames (VEC (pubname_entry, gc) * names) |
30ade641 | 8363 | { |
19cb6b50 | 8364 | unsigned i; |
af84796a | 8365 | unsigned long pubnames_length = size_of_pubnames (names); |
8366 | pubname_ref pub; | |
ec1e49cc | 8367 | |
65bdc57c | 8368 | if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4) |
8369 | dw2_asm_output_data (4, 0xffffffff, | |
8370 | "Initial length escape value indicating 64-bit DWARF extension"); | |
af84796a | 8371 | if (names == pubname_table) |
8372 | dw2_asm_output_data (DWARF_OFFSET_SIZE, pubnames_length, | |
8373 | "Length of Public Names Info"); | |
8374 | else | |
8375 | dw2_asm_output_data (DWARF_OFFSET_SIZE, pubnames_length, | |
8376 | "Length of Public Type Names Info"); | |
ca98eb0a | 8377 | dw2_asm_output_data (2, DWARF_VERSION, "DWARF Version"); |
ca98eb0a | 8378 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, debug_info_section_label, |
d08d29c0 | 8379 | debug_info_section, |
ca98eb0a | 8380 | "Offset of Compilation Unit Info"); |
ca98eb0a | 8381 | dw2_asm_output_data (DWARF_OFFSET_SIZE, next_die_offset, |
8382 | "Compilation Unit Length"); | |
ec1e49cc | 8383 | |
af84796a | 8384 | for (i = 0; VEC_iterate (pubname_entry, names, i, pub); i++) |
30ade641 | 8385 | { |
61a9389f | 8386 | /* We shouldn't see pubnames for DIEs outside of the main CU. */ |
af84796a | 8387 | if (names == pubname_table) |
8388 | gcc_assert (pub->die->die_mark); | |
19f716e5 | 8389 | |
af84796a | 8390 | if (names != pubtype_table |
8391 | || pub->die->die_offset != 0 | |
8392 | || !flag_eliminate_unused_debug_types) | |
8393 | { | |
8394 | dw2_asm_output_data (DWARF_OFFSET_SIZE, pub->die->die_offset, | |
8395 | "DIE offset"); | |
ec1e49cc | 8396 | |
af84796a | 8397 | dw2_asm_output_nstring (pub->name, -1, "external name"); |
8398 | } | |
30ade641 | 8399 | } |
ec1e49cc | 8400 | |
ca98eb0a | 8401 | dw2_asm_output_data (DWARF_OFFSET_SIZE, 0, NULL); |
30ade641 | 8402 | } |
8403 | ||
dc7a29ce | 8404 | /* Add a new entry to .debug_aranges if appropriate. */ |
ec1e49cc | 8405 | |
dc7a29ce | 8406 | static void |
8ec3a57b | 8407 | add_arange (tree decl, dw_die_ref die) |
dc7a29ce | 8408 | { |
8409 | if (! DECL_SECTION_NAME (decl)) | |
8410 | return; | |
8411 | ||
8412 | if (arange_table_in_use == arange_table_allocated) | |
8413 | { | |
8414 | arange_table_allocated += ARANGE_TABLE_INCREMENT; | |
2457c754 | 8415 | arange_table = GGC_RESIZEVEC (dw_die_ref, arange_table, |
8416 | arange_table_allocated); | |
573aba85 | 8417 | memset (arange_table + arange_table_in_use, 0, |
8418 | ARANGE_TABLE_INCREMENT * sizeof (dw_die_ref)); | |
dc7a29ce | 8419 | } |
ec1e49cc | 8420 | |
dc7a29ce | 8421 | arange_table[arange_table_in_use++] = die; |
8422 | } | |
8423 | ||
30ade641 | 8424 | /* Output the information that goes into the .debug_aranges table. |
8425 | Namely, define the beginning and ending address range of the | |
8426 | text section generated for this compilation unit. */ | |
ec1e49cc | 8427 | |
30ade641 | 8428 | static void |
8ec3a57b | 8429 | output_aranges (void) |
30ade641 | 8430 | { |
19cb6b50 | 8431 | unsigned i; |
8432 | unsigned long aranges_length = size_of_aranges (); | |
ec1e49cc | 8433 | |
65bdc57c | 8434 | if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4) |
8435 | dw2_asm_output_data (4, 0xffffffff, | |
8436 | "Initial length escape value indicating 64-bit DWARF extension"); | |
ca98eb0a | 8437 | dw2_asm_output_data (DWARF_OFFSET_SIZE, aranges_length, |
8438 | "Length of Address Ranges Info"); | |
ca98eb0a | 8439 | dw2_asm_output_data (2, DWARF_VERSION, "DWARF Version"); |
ca98eb0a | 8440 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, debug_info_section_label, |
d08d29c0 | 8441 | debug_info_section, |
ca98eb0a | 8442 | "Offset of Compilation Unit Info"); |
ca98eb0a | 8443 | dw2_asm_output_data (1, DWARF2_ADDR_SIZE, "Size of Address"); |
ca98eb0a | 8444 | dw2_asm_output_data (1, 0, "Size of Segment Descriptor"); |
ec1e49cc | 8445 | |
e711a040 | 8446 | /* We need to align to twice the pointer size here. */ |
8447 | if (DWARF_ARANGES_PAD_SIZE) | |
8448 | { | |
ca98eb0a | 8449 | /* Pad using a 2 byte words so that padding is correct for any |
c83a163c | 8450 | pointer size. */ |
ca98eb0a | 8451 | dw2_asm_output_data (2, 0, "Pad to %d byte boundary", |
8452 | 2 * DWARF2_ADDR_SIZE); | |
950ae8fe | 8453 | for (i = 2; i < (unsigned) DWARF_ARANGES_PAD_SIZE; i += 2) |
ca98eb0a | 8454 | dw2_asm_output_data (2, 0, NULL); |
e711a040 | 8455 | } |
ec1e49cc | 8456 | |
d6de7df9 | 8457 | /* It is necessary not to output these entries if the sections were |
8458 | not used; if the sections were not used, the length will be 0 and | |
8459 | the address may end up as 0 if the section is discarded by ld | |
8460 | --gc-sections, leaving an invalid (0, 0) entry that can be | |
8461 | confused with the terminator. */ | |
8462 | if (text_section_used) | |
8463 | { | |
8464 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, text_section_label, "Address"); | |
8465 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, text_end_label, | |
8466 | text_section_label, "Length"); | |
8467 | } | |
8468 | if (cold_text_section_used) | |
4d0e931f | 8469 | { |
61a9389f | 8470 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, cold_text_section_label, |
4d0e931f | 8471 | "Address"); |
8472 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, cold_end_label, | |
8473 | cold_text_section_label, "Length"); | |
8474 | } | |
ec1e49cc | 8475 | |
8c3f468d | 8476 | for (i = 0; i < arange_table_in_use; i++) |
dc7a29ce | 8477 | { |
2b553659 | 8478 | dw_die_ref die = arange_table[i]; |
ec1e49cc | 8479 | |
19f716e5 | 8480 | /* We shouldn't see aranges for DIEs outside of the main CU. */ |
7bd4f6b6 | 8481 | gcc_assert (die->die_mark); |
19f716e5 | 8482 | |
2b553659 | 8483 | if (die->die_tag == DW_TAG_subprogram) |
ca98eb0a | 8484 | { |
19e5668c | 8485 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, get_AT_low_pc (die), |
7cc7e163 | 8486 | "Address"); |
ca98eb0a | 8487 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, get_AT_hi_pc (die), |
8488 | get_AT_low_pc (die), "Length"); | |
8489 | } | |
dc7a29ce | 8490 | else |
59561872 | 8491 | { |
2b553659 | 8492 | /* A static variable; extract the symbol from DW_AT_location. |
8493 | Note that this code isn't currently hit, as we only emit | |
8494 | aranges for functions (jason 9/23/99). */ | |
2b553659 | 8495 | dw_attr_ref a = get_AT (die, DW_AT_location); |
8496 | dw_loc_descr_ref loc; | |
8c3f468d | 8497 | |
7bd4f6b6 | 8498 | gcc_assert (a && AT_class (a) == dw_val_class_loc); |
2b553659 | 8499 | |
c90bf86c | 8500 | loc = AT_loc (a); |
7bd4f6b6 | 8501 | gcc_assert (loc->dw_loc_opc == DW_OP_addr); |
2b553659 | 8502 | |
ca98eb0a | 8503 | dw2_asm_output_addr_rtx (DWARF2_ADDR_SIZE, |
8504 | loc->dw_loc_oprnd1.v.val_addr, "Address"); | |
8505 | dw2_asm_output_data (DWARF2_ADDR_SIZE, | |
8506 | get_AT_unsigned (die, DW_AT_byte_size), | |
8507 | "Length"); | |
59561872 | 8508 | } |
dc7a29ce | 8509 | } |
ec1e49cc | 8510 | |
30ade641 | 8511 | /* Output the terminator words. */ |
ca98eb0a | 8512 | dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, NULL); |
8513 | dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, NULL); | |
30ade641 | 8514 | } |
8515 | ||
a36145ca | 8516 | /* Add a new entry to .debug_ranges. Return the offset at which it |
8517 | was placed. */ | |
8518 | ||
8519 | static unsigned int | |
f221c0bd | 8520 | add_ranges_num (int num) |
a36145ca | 8521 | { |
8522 | unsigned int in_use = ranges_table_in_use; | |
8523 | ||
8524 | if (in_use == ranges_table_allocated) | |
8525 | { | |
8526 | ranges_table_allocated += RANGES_TABLE_INCREMENT; | |
2457c754 | 8527 | ranges_table = GGC_RESIZEVEC (struct dw_ranges_struct, ranges_table, |
8528 | ranges_table_allocated); | |
573aba85 | 8529 | memset (ranges_table + ranges_table_in_use, 0, |
8530 | RANGES_TABLE_INCREMENT * sizeof (struct dw_ranges_struct)); | |
a36145ca | 8531 | } |
8532 | ||
f221c0bd | 8533 | ranges_table[in_use].num = num; |
a36145ca | 8534 | ranges_table_in_use = in_use + 1; |
8535 | ||
8536 | return in_use * 2 * DWARF2_ADDR_SIZE; | |
8537 | } | |
8538 | ||
f221c0bd | 8539 | /* Add a new entry to .debug_ranges corresponding to a block, or a |
8540 | range terminator if BLOCK is NULL. */ | |
8541 | ||
8542 | static unsigned int | |
5493cb9a | 8543 | add_ranges (const_tree block) |
f221c0bd | 8544 | { |
8545 | return add_ranges_num (block ? BLOCK_NUMBER (block) : 0); | |
8546 | } | |
8547 | ||
8548 | /* Add a new entry to .debug_ranges corresponding to a pair of | |
8549 | labels. */ | |
8550 | ||
8551 | static unsigned int | |
8552 | add_ranges_by_labels (const char *begin, const char *end) | |
8553 | { | |
8554 | unsigned int in_use = ranges_by_label_in_use; | |
8555 | ||
8556 | if (in_use == ranges_by_label_allocated) | |
8557 | { | |
8558 | ranges_by_label_allocated += RANGES_TABLE_INCREMENT; | |
2457c754 | 8559 | ranges_by_label = GGC_RESIZEVEC (struct dw_ranges_by_label_struct, |
8560 | ranges_by_label, | |
8561 | ranges_by_label_allocated); | |
f221c0bd | 8562 | memset (ranges_by_label + ranges_by_label_in_use, 0, |
8563 | RANGES_TABLE_INCREMENT | |
8564 | * sizeof (struct dw_ranges_by_label_struct)); | |
8565 | } | |
8566 | ||
8567 | ranges_by_label[in_use].begin = begin; | |
8568 | ranges_by_label[in_use].end = end; | |
8569 | ranges_by_label_in_use = in_use + 1; | |
8570 | ||
8571 | return add_ranges_num (-(int)in_use - 1); | |
8572 | } | |
8573 | ||
a36145ca | 8574 | static void |
8ec3a57b | 8575 | output_ranges (void) |
a36145ca | 8576 | { |
19cb6b50 | 8577 | unsigned i; |
0d95286f | 8578 | static const char *const start_fmt = "Offset 0x%x"; |
a36145ca | 8579 | const char *fmt = start_fmt; |
8580 | ||
8c3f468d | 8581 | for (i = 0; i < ranges_table_in_use; i++) |
a36145ca | 8582 | { |
f221c0bd | 8583 | int block_num = ranges_table[i].num; |
a36145ca | 8584 | |
f221c0bd | 8585 | if (block_num > 0) |
a36145ca | 8586 | { |
8587 | char blabel[MAX_ARTIFICIAL_LABEL_BYTES]; | |
8588 | char elabel[MAX_ARTIFICIAL_LABEL_BYTES]; | |
8589 | ||
8590 | ASM_GENERATE_INTERNAL_LABEL (blabel, BLOCK_BEGIN_LABEL, block_num); | |
8591 | ASM_GENERATE_INTERNAL_LABEL (elabel, BLOCK_END_LABEL, block_num); | |
8592 | ||
8593 | /* If all code is in the text section, then the compilation | |
8594 | unit base address defaults to DW_AT_low_pc, which is the | |
8595 | base of the text section. */ | |
dae1861f | 8596 | if (!have_multiple_function_sections) |
a36145ca | 8597 | { |
4d0e931f | 8598 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, blabel, |
8599 | text_section_label, | |
8600 | fmt, i * 2 * DWARF2_ADDR_SIZE); | |
8601 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, elabel, | |
8602 | text_section_label, NULL); | |
a36145ca | 8603 | } |
8c3f468d | 8604 | |
f221c0bd | 8605 | /* Otherwise, the compilation unit base address is zero, |
8606 | which allows us to use absolute addresses, and not worry | |
8607 | about whether the target supports cross-section | |
8608 | arithmetic. */ | |
a36145ca | 8609 | else |
8610 | { | |
8611 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, blabel, | |
8612 | fmt, i * 2 * DWARF2_ADDR_SIZE); | |
8613 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, elabel, NULL); | |
8614 | } | |
8615 | ||
8616 | fmt = NULL; | |
8617 | } | |
f221c0bd | 8618 | |
8619 | /* Negative block_num stands for an index into ranges_by_label. */ | |
8620 | else if (block_num < 0) | |
8621 | { | |
8622 | int lab_idx = - block_num - 1; | |
8623 | ||
8624 | if (!have_multiple_function_sections) | |
8625 | { | |
8626 | gcc_unreachable (); | |
8627 | #if 0 | |
8628 | /* If we ever use add_ranges_by_labels () for a single | |
8629 | function section, all we have to do is to take out | |
8630 | the #if 0 above. */ | |
8631 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, | |
8632 | ranges_by_label[lab_idx].begin, | |
8633 | text_section_label, | |
8634 | fmt, i * 2 * DWARF2_ADDR_SIZE); | |
8635 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, | |
8636 | ranges_by_label[lab_idx].end, | |
8637 | text_section_label, NULL); | |
8638 | #endif | |
8639 | } | |
8640 | else | |
8641 | { | |
8642 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, | |
8643 | ranges_by_label[lab_idx].begin, | |
8644 | fmt, i * 2 * DWARF2_ADDR_SIZE); | |
8645 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, | |
8646 | ranges_by_label[lab_idx].end, | |
8647 | NULL); | |
8648 | } | |
8649 | } | |
a36145ca | 8650 | else |
8651 | { | |
8652 | dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, NULL); | |
8653 | dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, NULL); | |
8654 | fmt = start_fmt; | |
8655 | } | |
8656 | } | |
8657 | } | |
ac02093f | 8658 | |
8659 | /* Data structure containing information about input files. */ | |
8660 | struct file_info | |
8661 | { | |
69278c24 | 8662 | const char *path; /* Complete file name. */ |
8663 | const char *fname; /* File name part. */ | |
ac02093f | 8664 | int length; /* Length of entire string. */ |
69278c24 | 8665 | struct dwarf_file_data * file_idx; /* Index in input file table. */ |
ac02093f | 8666 | int dir_idx; /* Index in directory table. */ |
8667 | }; | |
8668 | ||
8669 | /* Data structure containing information about directories with source | |
8670 | files. */ | |
8671 | struct dir_info | |
8672 | { | |
69278c24 | 8673 | const char *path; /* Path including directory name. */ |
ac02093f | 8674 | int length; /* Path length. */ |
8675 | int prefix; /* Index of directory entry which is a prefix. */ | |
ac02093f | 8676 | int count; /* Number of files in this directory. */ |
8677 | int dir_idx; /* Index of directory used as base. */ | |
ac02093f | 8678 | }; |
8679 | ||
8680 | /* Callback function for file_info comparison. We sort by looking at | |
8681 | the directories in the path. */ | |
5fbe2ebb | 8682 | |
ac02093f | 8683 | static int |
8ec3a57b | 8684 | file_info_cmp (const void *p1, const void *p2) |
ac02093f | 8685 | { |
2457c754 | 8686 | const struct file_info *const s1 = (const struct file_info *) p1; |
8687 | const struct file_info *const s2 = (const struct file_info *) p2; | |
c1fdef8e | 8688 | const unsigned char *cp1; |
8689 | const unsigned char *cp2; | |
ac02093f | 8690 | |
5fbe2ebb | 8691 | /* Take care of file names without directories. We need to make sure that |
8692 | we return consistent values to qsort since some will get confused if | |
8693 | we return the same value when identical operands are passed in opposite | |
8694 | orders. So if neither has a directory, return 0 and otherwise return | |
8695 | 1 or -1 depending on which one has the directory. */ | |
8696 | if ((s1->path == s1->fname || s2->path == s2->fname)) | |
8697 | return (s2->path == s2->fname) - (s1->path == s1->fname); | |
ac02093f | 8698 | |
c1fdef8e | 8699 | cp1 = (const unsigned char *) s1->path; |
8700 | cp2 = (const unsigned char *) s2->path; | |
ac02093f | 8701 | |
8702 | while (1) | |
8703 | { | |
8704 | ++cp1; | |
8705 | ++cp2; | |
5fbe2ebb | 8706 | /* Reached the end of the first path? If so, handle like above. */ |
c1fdef8e | 8707 | if ((cp1 == (const unsigned char *) s1->fname) |
8708 | || (cp2 == (const unsigned char *) s2->fname)) | |
8709 | return ((cp2 == (const unsigned char *) s2->fname) | |
8710 | - (cp1 == (const unsigned char *) s1->fname)); | |
ac02093f | 8711 | |
8712 | /* Character of current path component the same? */ | |
5fbe2ebb | 8713 | else if (*cp1 != *cp2) |
ac02093f | 8714 | return *cp1 - *cp2; |
8715 | } | |
8716 | } | |
8717 | ||
61a9389f | 8718 | struct file_name_acquire_data |
69278c24 | 8719 | { |
8720 | struct file_info *files; | |
8721 | int used_files; | |
8722 | int max_files; | |
8723 | }; | |
8724 | ||
8725 | /* Traversal function for the hash table. */ | |
8726 | ||
8727 | static int | |
8728 | file_name_acquire (void ** slot, void *data) | |
8729 | { | |
2457c754 | 8730 | struct file_name_acquire_data *fnad = (struct file_name_acquire_data *) data; |
8731 | struct dwarf_file_data *d = (struct dwarf_file_data *) *slot; | |
69278c24 | 8732 | struct file_info *fi; |
8733 | const char *f; | |
8734 | ||
8735 | gcc_assert (fnad->max_files >= d->emitted_number); | |
8736 | ||
8737 | if (! d->emitted_number) | |
8738 | return 1; | |
8739 | ||
8740 | gcc_assert (fnad->max_files != fnad->used_files); | |
8741 | ||
8742 | fi = fnad->files + fnad->used_files++; | |
8743 | ||
8744 | /* Skip all leading "./". */ | |
8745 | f = d->filename; | |
974a92fe | 8746 | while (f[0] == '.' && IS_DIR_SEPARATOR (f[1])) |
69278c24 | 8747 | f += 2; |
61a9389f | 8748 | |
69278c24 | 8749 | /* Create a new array entry. */ |
8750 | fi->path = f; | |
8751 | fi->length = strlen (f); | |
8752 | fi->file_idx = d; | |
61a9389f | 8753 | |
69278c24 | 8754 | /* Search for the file name part. */ |
974a92fe | 8755 | f = strrchr (f, DIR_SEPARATOR); |
8756 | #if defined (DIR_SEPARATOR_2) | |
8757 | { | |
8defa33e | 8758 | char *g = strrchr (fi->path, DIR_SEPARATOR_2); |
974a92fe | 8759 | |
8760 | if (g != NULL) | |
8761 | { | |
8762 | if (f == NULL || f < g) | |
8763 | f = g; | |
8764 | } | |
8765 | } | |
8766 | #endif | |
8767 | ||
69278c24 | 8768 | fi->fname = f == NULL ? fi->path : f + 1; |
8769 | return 1; | |
8770 | } | |
8771 | ||
ac02093f | 8772 | /* Output the directory table and the file name table. We try to minimize |
8773 | the total amount of memory needed. A heuristic is used to avoid large | |
8774 | slowdowns with many input files. */ | |
8c3f468d | 8775 | |
ac02093f | 8776 | static void |
8ec3a57b | 8777 | output_file_names (void) |
ac02093f | 8778 | { |
69278c24 | 8779 | struct file_name_acquire_data fnad; |
8780 | int numfiles; | |
ac02093f | 8781 | struct file_info *files; |
8782 | struct dir_info *dirs; | |
8783 | int *saved; | |
8784 | int *savehere; | |
8785 | int *backmap; | |
69278c24 | 8786 | int ndirs; |
ac02093f | 8787 | int idx_offset; |
69278c24 | 8788 | int i; |
ac02093f | 8789 | int idx; |
8790 | ||
69278c24 | 8791 | if (!last_emitted_file) |
21d1bacf | 8792 | { |
8793 | dw2_asm_output_data (1, 0, "End directory table"); | |
8794 | dw2_asm_output_data (1, 0, "End file name table"); | |
8795 | return; | |
8796 | } | |
8797 | ||
69278c24 | 8798 | numfiles = last_emitted_file->emitted_number; |
ac02093f | 8799 | |
69278c24 | 8800 | /* Allocate the various arrays we need. */ |
2457c754 | 8801 | files = XALLOCAVEC (struct file_info, numfiles); |
8802 | dirs = XALLOCAVEC (struct dir_info, numfiles); | |
ac02093f | 8803 | |
69278c24 | 8804 | fnad.files = files; |
8805 | fnad.used_files = 0; | |
8806 | fnad.max_files = numfiles; | |
8807 | htab_traverse (file_table, file_name_acquire, &fnad); | |
8808 | gcc_assert (fnad.used_files == fnad.max_files); | |
8c3f468d | 8809 | |
69278c24 | 8810 | qsort (files, numfiles, sizeof (files[0]), file_info_cmp); |
ac02093f | 8811 | |
8812 | /* Find all the different directories used. */ | |
69278c24 | 8813 | dirs[0].path = files[0].path; |
8814 | dirs[0].length = files[0].fname - files[0].path; | |
ac02093f | 8815 | dirs[0].prefix = -1; |
ac02093f | 8816 | dirs[0].count = 1; |
8817 | dirs[0].dir_idx = 0; | |
69278c24 | 8818 | files[0].dir_idx = 0; |
ac02093f | 8819 | ndirs = 1; |
8820 | ||
69278c24 | 8821 | for (i = 1; i < numfiles; i++) |
ac02093f | 8822 | if (files[i].fname - files[i].path == dirs[ndirs - 1].length |
8823 | && memcmp (dirs[ndirs - 1].path, files[i].path, | |
8824 | dirs[ndirs - 1].length) == 0) | |
8825 | { | |
8826 | /* Same directory as last entry. */ | |
8827 | files[i].dir_idx = ndirs - 1; | |
ac02093f | 8828 | ++dirs[ndirs - 1].count; |
8829 | } | |
8830 | else | |
8831 | { | |
69278c24 | 8832 | int j; |
ac02093f | 8833 | |
8834 | /* This is a new directory. */ | |
8835 | dirs[ndirs].path = files[i].path; | |
8836 | dirs[ndirs].length = files[i].fname - files[i].path; | |
ac02093f | 8837 | dirs[ndirs].count = 1; |
8838 | dirs[ndirs].dir_idx = ndirs; | |
ac02093f | 8839 | files[i].dir_idx = ndirs; |
8840 | ||
8841 | /* Search for a prefix. */ | |
3740694f | 8842 | dirs[ndirs].prefix = -1; |
8c3f468d | 8843 | for (j = 0; j < ndirs; j++) |
3740694f | 8844 | if (dirs[j].length < dirs[ndirs].length |
8845 | && dirs[j].length > 1 | |
8846 | && (dirs[ndirs].prefix == -1 | |
8847 | || dirs[j].length > dirs[dirs[ndirs].prefix].length) | |
8848 | && memcmp (dirs[j].path, dirs[ndirs].path, dirs[j].length) == 0) | |
8849 | dirs[ndirs].prefix = j; | |
ac02093f | 8850 | |
8851 | ++ndirs; | |
8852 | } | |
8853 | ||
8c3f468d | 8854 | /* Now to the actual work. We have to find a subset of the directories which |
8855 | allow expressing the file name using references to the directory table | |
8856 | with the least amount of characters. We do not do an exhaustive search | |
8857 | where we would have to check out every combination of every single | |
8858 | possible prefix. Instead we use a heuristic which provides nearly optimal | |
8859 | results in most cases and never is much off. */ | |
2457c754 | 8860 | saved = XALLOCAVEC (int, ndirs); |
8861 | savehere = XALLOCAVEC (int, ndirs); | |
ac02093f | 8862 | |
8863 | memset (saved, '\0', ndirs * sizeof (saved[0])); | |
8c3f468d | 8864 | for (i = 0; i < ndirs; i++) |
ac02093f | 8865 | { |
69278c24 | 8866 | int j; |
ac02093f | 8867 | int total; |
8868 | ||
8c3f468d | 8869 | /* We can always save some space for the current directory. But this |
8870 | does not mean it will be enough to justify adding the directory. */ | |
ac02093f | 8871 | savehere[i] = dirs[i].length; |
8872 | total = (savehere[i] - saved[i]) * dirs[i].count; | |
8873 | ||
8c3f468d | 8874 | for (j = i + 1; j < ndirs; j++) |
ac02093f | 8875 | { |
8876 | savehere[j] = 0; | |
ac02093f | 8877 | if (saved[j] < dirs[i].length) |
8878 | { | |
8879 | /* Determine whether the dirs[i] path is a prefix of the | |
8880 | dirs[j] path. */ | |
8881 | int k; | |
8882 | ||
3740694f | 8883 | k = dirs[j].prefix; |
ff279357 | 8884 | while (k != -1 && k != (int) i) |
3740694f | 8885 | k = dirs[k].prefix; |
8886 | ||
ff279357 | 8887 | if (k == (int) i) |
3740694f | 8888 | { |
69278c24 | 8889 | /* Yes it is. We can possibly save some memory by |
3740694f | 8890 | writing the filenames in dirs[j] relative to |
8891 | dirs[i]. */ | |
8892 | savehere[j] = dirs[i].length; | |
8893 | total += (savehere[j] - saved[j]) * dirs[j].count; | |
8894 | } | |
ac02093f | 8895 | } |
8896 | } | |
8897 | ||
69278c24 | 8898 | /* Check whether we can save enough to justify adding the dirs[i] |
ac02093f | 8899 | directory. */ |
8900 | if (total > dirs[i].length + 1) | |
8901 | { | |
3740694f | 8902 | /* It's worthwhile adding. */ |
bc70bd5e | 8903 | for (j = i; j < ndirs; j++) |
ac02093f | 8904 | if (savehere[j] > 0) |
8905 | { | |
8906 | /* Remember how much we saved for this directory so far. */ | |
8907 | saved[j] = savehere[j]; | |
8908 | ||
8909 | /* Remember the prefix directory. */ | |
8910 | dirs[j].dir_idx = i; | |
8911 | } | |
8912 | } | |
8913 | } | |
8914 | ||
69278c24 | 8915 | /* Emit the directory name table. */ |
ac02093f | 8916 | idx = 1; |
f9038ab4 | 8917 | idx_offset = dirs[0].length > 0 ? 1 : 0; |
8c3f468d | 8918 | for (i = 1 - idx_offset; i < ndirs; i++) |
69278c24 | 8919 | dw2_asm_output_nstring (dirs[i].path, dirs[i].length - 1, |
8920 | "Directory Entry: 0x%x", i + idx_offset); | |
8c3f468d | 8921 | |
ca98eb0a | 8922 | dw2_asm_output_data (1, 0, "End directory table"); |
8923 | ||
69278c24 | 8924 | /* We have to emit them in the order of emitted_number since that's |
8925 | used in the debug info generation. To do this efficiently we | |
8926 | generate a back-mapping of the indices first. */ | |
2457c754 | 8927 | backmap = XALLOCAVEC (int, numfiles); |
69278c24 | 8928 | for (i = 0; i < numfiles; i++) |
8929 | backmap[files[i].file_idx->emitted_number - 1] = i; | |
ac02093f | 8930 | |
8931 | /* Now write all the file names. */ | |
69278c24 | 8932 | for (i = 0; i < numfiles; i++) |
ac02093f | 8933 | { |
8934 | int file_idx = backmap[i]; | |
8935 | int dir_idx = dirs[files[file_idx].dir_idx].dir_idx; | |
8936 | ||
ca98eb0a | 8937 | dw2_asm_output_nstring (files[file_idx].path + dirs[dir_idx].length, -1, |
69278c24 | 8938 | "File Entry: 0x%x", (unsigned) i + 1); |
ac02093f | 8939 | |
8940 | /* Include directory index. */ | |
69278c24 | 8941 | dw2_asm_output_data_uleb128 (dir_idx + idx_offset, NULL); |
ac02093f | 8942 | |
8943 | /* Modification time. */ | |
ca98eb0a | 8944 | dw2_asm_output_data_uleb128 (0, NULL); |
ac02093f | 8945 | |
8946 | /* File length in bytes. */ | |
ca98eb0a | 8947 | dw2_asm_output_data_uleb128 (0, NULL); |
ac02093f | 8948 | } |
8c3f468d | 8949 | |
ca98eb0a | 8950 | dw2_asm_output_data (1, 0, "End file name table"); |
ac02093f | 8951 | } |
8952 | ||
8953 | ||
30ade641 | 8954 | /* Output the source line number correspondence information. This |
155b05dc | 8955 | information goes into the .debug_line section. */ |
ec1e49cc | 8956 | |
30ade641 | 8957 | static void |
8ec3a57b | 8958 | output_line_info (void) |
30ade641 | 8959 | { |
3740694f | 8960 | char l1[20], l2[20], p1[20], p2[20]; |
30ade641 | 8961 | char line_label[MAX_ARTIFICIAL_LABEL_BYTES]; |
8962 | char prev_line_label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
19cb6b50 | 8963 | unsigned opc; |
8964 | unsigned n_op_args; | |
8965 | unsigned long lt_index; | |
8966 | unsigned long current_line; | |
8967 | long line_offset; | |
8968 | long line_delta; | |
8969 | unsigned long current_file; | |
8970 | unsigned long function; | |
ec1e49cc | 8971 | |
ca98eb0a | 8972 | ASM_GENERATE_INTERNAL_LABEL (l1, LINE_NUMBER_BEGIN_LABEL, 0); |
8973 | ASM_GENERATE_INTERNAL_LABEL (l2, LINE_NUMBER_END_LABEL, 0); | |
3740694f | 8974 | ASM_GENERATE_INTERNAL_LABEL (p1, LN_PROLOG_AS_LABEL, 0); |
8975 | ASM_GENERATE_INTERNAL_LABEL (p2, LN_PROLOG_END_LABEL, 0); | |
ec1e49cc | 8976 | |
65bdc57c | 8977 | if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4) |
8978 | dw2_asm_output_data (4, 0xffffffff, | |
8979 | "Initial length escape value indicating 64-bit DWARF extension"); | |
ca98eb0a | 8980 | dw2_asm_output_delta (DWARF_OFFSET_SIZE, l2, l1, |
8981 | "Length of Source Line Info"); | |
8982 | ASM_OUTPUT_LABEL (asm_out_file, l1); | |
ec1e49cc | 8983 | |
ca98eb0a | 8984 | dw2_asm_output_data (2, DWARF_VERSION, "DWARF Version"); |
3740694f | 8985 | dw2_asm_output_delta (DWARF_OFFSET_SIZE, p2, p1, "Prolog Length"); |
8986 | ASM_OUTPUT_LABEL (asm_out_file, p1); | |
ec1e49cc | 8987 | |
bfba49c6 | 8988 | /* Define the architecture-dependent minimum instruction length (in |
8989 | bytes). In this implementation of DWARF, this field is used for | |
8990 | information purposes only. Since GCC generates assembly language, | |
8991 | we have no a priori knowledge of how many instruction bytes are | |
8992 | generated for each source line, and therefore can use only the | |
8993 | DW_LNE_set_address and DW_LNS_fixed_advance_pc line information | |
8994 | commands. Accordingly, we fix this as `1', which is "correct | |
8995 | enough" for all architectures, and don't let the target override. */ | |
8996 | dw2_asm_output_data (1, 1, | |
ca98eb0a | 8997 | "Minimum Instruction Length"); |
bfba49c6 | 8998 | |
ca98eb0a | 8999 | dw2_asm_output_data (1, DWARF_LINE_DEFAULT_IS_STMT_START, |
9000 | "Default is_stmt_start flag"); | |
ca98eb0a | 9001 | dw2_asm_output_data (1, DWARF_LINE_BASE, |
9002 | "Line Base Value (Special Opcodes)"); | |
ca98eb0a | 9003 | dw2_asm_output_data (1, DWARF_LINE_RANGE, |
9004 | "Line Range Value (Special Opcodes)"); | |
ca98eb0a | 9005 | dw2_asm_output_data (1, DWARF_LINE_OPCODE_BASE, |
9006 | "Special Opcode Base"); | |
ec1e49cc | 9007 | |
8c3f468d | 9008 | for (opc = 1; opc < DWARF_LINE_OPCODE_BASE; opc++) |
30ade641 | 9009 | { |
9010 | switch (opc) | |
9011 | { | |
9012 | case DW_LNS_advance_pc: | |
9013 | case DW_LNS_advance_line: | |
9014 | case DW_LNS_set_file: | |
9015 | case DW_LNS_set_column: | |
9016 | case DW_LNS_fixed_advance_pc: | |
9017 | n_op_args = 1; | |
9018 | break; | |
9019 | default: | |
9020 | n_op_args = 0; | |
9021 | break; | |
9022 | } | |
ca98eb0a | 9023 | |
9024 | dw2_asm_output_data (1, n_op_args, "opcode: 0x%x has %d args", | |
9025 | opc, n_op_args); | |
30ade641 | 9026 | } |
ec1e49cc | 9027 | |
ac02093f | 9028 | /* Write out the information about the files we use. */ |
9029 | output_file_names (); | |
3740694f | 9030 | ASM_OUTPUT_LABEL (asm_out_file, p2); |
30ade641 | 9031 | |
d8488b8a | 9032 | /* We used to set the address register to the first location in the text |
9033 | section here, but that didn't accomplish anything since we already | |
9034 | have a line note for the opening brace of the first function. */ | |
30ade641 | 9035 | |
9036 | /* Generate the line number to PC correspondence table, encoded as | |
9037 | a series of state machine operations. */ | |
9038 | current_file = 1; | |
9039 | current_line = 1; | |
4d0e931f | 9040 | |
5fbee89d | 9041 | if (cfun && in_cold_section_p) |
abe32cce | 9042 | strcpy (prev_line_label, crtl->subsections.cold_section_label); |
1897b881 | 9043 | else |
9044 | strcpy (prev_line_label, text_section_label); | |
30ade641 | 9045 | for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index) |
9046 | { | |
19cb6b50 | 9047 | dw_line_info_ref line_info = &line_info_table[lt_index]; |
d8488b8a | 9048 | |
e7b3c55c | 9049 | #if 0 |
9050 | /* Disable this optimization for now; GDB wants to see two line notes | |
9051 | at the beginning of a function so it can find the end of the | |
9052 | prologue. */ | |
9053 | ||
d8488b8a | 9054 | /* Don't emit anything for redundant notes. Just updating the |
c83a163c | 9055 | address doesn't accomplish anything, because we already assume |
9056 | that anything after the last address is this line. */ | |
d8488b8a | 9057 | if (line_info->dw_line_num == current_line |
9058 | && line_info->dw_file_num == current_file) | |
9059 | continue; | |
e7b3c55c | 9060 | #endif |
ec1e49cc | 9061 | |
ca98eb0a | 9062 | /* Emit debug info for the address of the current line. |
9063 | ||
9064 | Unfortunately, we have little choice here currently, and must always | |
8c3f468d | 9065 | use the most general form. GCC does not know the address delta |
ca98eb0a | 9066 | itself, so we can't use DW_LNS_advance_pc. Many ports do have length |
9067 | attributes which will give an upper bound on the address range. We | |
9068 | could perhaps use length attributes to determine when it is safe to | |
9069 | use DW_LNS_fixed_advance_pc. */ | |
9070 | ||
d58978a6 | 9071 | ASM_GENERATE_INTERNAL_LABEL (line_label, LINE_CODE_LABEL, lt_index); |
db998a6a | 9072 | if (0) |
9073 | { | |
9074 | /* This can handle deltas up to 0xffff. This takes 3 bytes. */ | |
ca98eb0a | 9075 | dw2_asm_output_data (1, DW_LNS_fixed_advance_pc, |
9076 | "DW_LNS_fixed_advance_pc"); | |
9077 | dw2_asm_output_delta (2, line_label, prev_line_label, NULL); | |
db998a6a | 9078 | } |
9079 | else | |
9080 | { | |
aaa408cd | 9081 | /* This can handle any delta. This takes |
c83a163c | 9082 | 4+DWARF2_ADDR_SIZE bytes. */ |
ca98eb0a | 9083 | dw2_asm_output_data (1, 0, "DW_LNE_set_address"); |
9084 | dw2_asm_output_data_uleb128 (1 + DWARF2_ADDR_SIZE, NULL); | |
9085 | dw2_asm_output_data (1, DW_LNE_set_address, NULL); | |
19e5668c | 9086 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, line_label, NULL); |
db998a6a | 9087 | } |
8c3f468d | 9088 | |
db998a6a | 9089 | strcpy (prev_line_label, line_label); |
9090 | ||
9091 | /* Emit debug info for the source file of the current line, if | |
9092 | different from the previous line. */ | |
30ade641 | 9093 | if (line_info->dw_file_num != current_file) |
9094 | { | |
9095 | current_file = line_info->dw_file_num; | |
ca98eb0a | 9096 | dw2_asm_output_data (1, DW_LNS_set_file, "DW_LNS_set_file"); |
69278c24 | 9097 | dw2_asm_output_data_uleb128 (current_file, "%lu", current_file); |
30ade641 | 9098 | } |
ec1e49cc | 9099 | |
db998a6a | 9100 | /* Emit debug info for the current line number, choosing the encoding |
9101 | that uses the least amount of space. */ | |
d8488b8a | 9102 | if (line_info->dw_line_num != current_line) |
30ade641 | 9103 | { |
d8488b8a | 9104 | line_offset = line_info->dw_line_num - current_line; |
9105 | line_delta = line_offset - DWARF_LINE_BASE; | |
9106 | current_line = line_info->dw_line_num; | |
9107 | if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1)) | |
8c3f468d | 9108 | /* This can handle deltas from -10 to 234, using the current |
9109 | definitions of DWARF_LINE_BASE and DWARF_LINE_RANGE. This | |
9110 | takes 1 byte. */ | |
9111 | dw2_asm_output_data (1, DWARF_LINE_OPCODE_BASE + line_delta, | |
9112 | "line %lu", current_line); | |
d8488b8a | 9113 | else |
9114 | { | |
9115 | /* This can handle any delta. This takes at least 4 bytes, | |
9116 | depending on the value being encoded. */ | |
ca98eb0a | 9117 | dw2_asm_output_data (1, DW_LNS_advance_line, |
9118 | "advance to line %lu", current_line); | |
9119 | dw2_asm_output_data_sleb128 (line_offset, NULL); | |
9120 | dw2_asm_output_data (1, DW_LNS_copy, "DW_LNS_copy"); | |
d8488b8a | 9121 | } |
6efd403b | 9122 | } |
9123 | else | |
8c3f468d | 9124 | /* We still need to start a new row, so output a copy insn. */ |
9125 | dw2_asm_output_data (1, DW_LNS_copy, "DW_LNS_copy"); | |
30ade641 | 9126 | } |
9127 | ||
db998a6a | 9128 | /* Emit debug info for the address of the end of the function. */ |
9129 | if (0) | |
9130 | { | |
ca98eb0a | 9131 | dw2_asm_output_data (1, DW_LNS_fixed_advance_pc, |
9132 | "DW_LNS_fixed_advance_pc"); | |
9133 | dw2_asm_output_delta (2, text_end_label, prev_line_label, NULL); | |
db998a6a | 9134 | } |
9135 | else | |
9136 | { | |
ca98eb0a | 9137 | dw2_asm_output_data (1, 0, "DW_LNE_set_address"); |
9138 | dw2_asm_output_data_uleb128 (1 + DWARF2_ADDR_SIZE, NULL); | |
9139 | dw2_asm_output_data (1, DW_LNE_set_address, NULL); | |
19e5668c | 9140 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, text_end_label, NULL); |
db998a6a | 9141 | } |
6ed29fb8 | 9142 | |
ca98eb0a | 9143 | dw2_asm_output_data (1, 0, "DW_LNE_end_sequence"); |
9144 | dw2_asm_output_data_uleb128 (1, NULL); | |
9145 | dw2_asm_output_data (1, DW_LNE_end_sequence, NULL); | |
c05d7491 | 9146 | |
9147 | function = 0; | |
9148 | current_file = 1; | |
9149 | current_line = 1; | |
f80d1bcd | 9150 | for (lt_index = 0; lt_index < separate_line_info_table_in_use;) |
c05d7491 | 9151 | { |
19cb6b50 | 9152 | dw_separate_line_info_ref line_info |
c05d7491 | 9153 | = &separate_line_info_table[lt_index]; |
ec1e49cc | 9154 | |
e7b3c55c | 9155 | #if 0 |
d8488b8a | 9156 | /* Don't emit anything for redundant notes. */ |
9157 | if (line_info->dw_line_num == current_line | |
9158 | && line_info->dw_file_num == current_file | |
9159 | && line_info->function == function) | |
9160 | goto cont; | |
e7b3c55c | 9161 | #endif |
d8488b8a | 9162 | |
db998a6a | 9163 | /* Emit debug info for the address of the current line. If this is |
9164 | a new function, or the first line of a function, then we need | |
9165 | to handle it differently. */ | |
d58978a6 | 9166 | ASM_GENERATE_INTERNAL_LABEL (line_label, SEPARATE_LINE_CODE_LABEL, |
9167 | lt_index); | |
c05d7491 | 9168 | if (function != line_info->function) |
9169 | { | |
9170 | function = line_info->function; | |
ec1e49cc | 9171 | |
2358393e | 9172 | /* Set the address register to the first line in the function. */ |
ca98eb0a | 9173 | dw2_asm_output_data (1, 0, "DW_LNE_set_address"); |
9174 | dw2_asm_output_data_uleb128 (1 + DWARF2_ADDR_SIZE, NULL); | |
9175 | dw2_asm_output_data (1, DW_LNE_set_address, NULL); | |
19e5668c | 9176 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, line_label, NULL); |
c05d7491 | 9177 | } |
9178 | else | |
9179 | { | |
db998a6a | 9180 | /* ??? See the DW_LNS_advance_pc comment above. */ |
9181 | if (0) | |
9182 | { | |
ca98eb0a | 9183 | dw2_asm_output_data (1, DW_LNS_fixed_advance_pc, |
9184 | "DW_LNS_fixed_advance_pc"); | |
9185 | dw2_asm_output_delta (2, line_label, prev_line_label, NULL); | |
db998a6a | 9186 | } |
9187 | else | |
9188 | { | |
ca98eb0a | 9189 | dw2_asm_output_data (1, 0, "DW_LNE_set_address"); |
9190 | dw2_asm_output_data_uleb128 (1 + DWARF2_ADDR_SIZE, NULL); | |
9191 | dw2_asm_output_data (1, DW_LNE_set_address, NULL); | |
19e5668c | 9192 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, line_label, NULL); |
db998a6a | 9193 | } |
c05d7491 | 9194 | } |
8c3f468d | 9195 | |
db998a6a | 9196 | strcpy (prev_line_label, line_label); |
ec1e49cc | 9197 | |
db998a6a | 9198 | /* Emit debug info for the source file of the current line, if |
9199 | different from the previous line. */ | |
c05d7491 | 9200 | if (line_info->dw_file_num != current_file) |
9201 | { | |
9202 | current_file = line_info->dw_file_num; | |
ca98eb0a | 9203 | dw2_asm_output_data (1, DW_LNS_set_file, "DW_LNS_set_file"); |
69278c24 | 9204 | dw2_asm_output_data_uleb128 (current_file, "%lu", current_file); |
c05d7491 | 9205 | } |
ec1e49cc | 9206 | |
db998a6a | 9207 | /* Emit debug info for the current line number, choosing the encoding |
9208 | that uses the least amount of space. */ | |
c05d7491 | 9209 | if (line_info->dw_line_num != current_line) |
9210 | { | |
9211 | line_offset = line_info->dw_line_num - current_line; | |
9212 | line_delta = line_offset - DWARF_LINE_BASE; | |
9213 | current_line = line_info->dw_line_num; | |
9214 | if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1)) | |
ca98eb0a | 9215 | dw2_asm_output_data (1, DWARF_LINE_OPCODE_BASE + line_delta, |
9216 | "line %lu", current_line); | |
c05d7491 | 9217 | else |
9218 | { | |
ca98eb0a | 9219 | dw2_asm_output_data (1, DW_LNS_advance_line, |
9220 | "advance to line %lu", current_line); | |
9221 | dw2_asm_output_data_sleb128 (line_offset, NULL); | |
9222 | dw2_asm_output_data (1, DW_LNS_copy, "DW_LNS_copy"); | |
c05d7491 | 9223 | } |
9224 | } | |
d8488b8a | 9225 | else |
ca98eb0a | 9226 | dw2_asm_output_data (1, DW_LNS_copy, "DW_LNS_copy"); |
ec1e49cc | 9227 | |
e7b3c55c | 9228 | #if 0 |
d8488b8a | 9229 | cont: |
e7b3c55c | 9230 | #endif |
8c3f468d | 9231 | |
9232 | lt_index++; | |
c05d7491 | 9233 | |
9234 | /* If we're done with a function, end its sequence. */ | |
9235 | if (lt_index == separate_line_info_table_in_use | |
9236 | || separate_line_info_table[lt_index].function != function) | |
9237 | { | |
9238 | current_file = 1; | |
9239 | current_line = 1; | |
ec1e49cc | 9240 | |
db998a6a | 9241 | /* Emit debug info for the address of the end of the function. */ |
d58978a6 | 9242 | ASM_GENERATE_INTERNAL_LABEL (line_label, FUNC_END_LABEL, function); |
db998a6a | 9243 | if (0) |
9244 | { | |
ca98eb0a | 9245 | dw2_asm_output_data (1, DW_LNS_fixed_advance_pc, |
9246 | "DW_LNS_fixed_advance_pc"); | |
9247 | dw2_asm_output_delta (2, line_label, prev_line_label, NULL); | |
db998a6a | 9248 | } |
9249 | else | |
9250 | { | |
ca98eb0a | 9251 | dw2_asm_output_data (1, 0, "DW_LNE_set_address"); |
9252 | dw2_asm_output_data_uleb128 (1 + DWARF2_ADDR_SIZE, NULL); | |
9253 | dw2_asm_output_data (1, DW_LNE_set_address, NULL); | |
19e5668c | 9254 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, line_label, NULL); |
db998a6a | 9255 | } |
c05d7491 | 9256 | |
9257 | /* Output the marker for the end of this sequence. */ | |
ca98eb0a | 9258 | dw2_asm_output_data (1, 0, "DW_LNE_end_sequence"); |
9259 | dw2_asm_output_data_uleb128 (1, NULL); | |
9260 | dw2_asm_output_data (1, DW_LNE_end_sequence, NULL); | |
c05d7491 | 9261 | } |
9262 | } | |
d6d10a79 | 9263 | |
9264 | /* Output the marker for the end of the line number info. */ | |
ca98eb0a | 9265 | ASM_OUTPUT_LABEL (asm_out_file, l2); |
30ade641 | 9266 | } |
9267 | \f | |
30ade641 | 9268 | /* Given a pointer to a tree node for some base type, return a pointer to |
9269 | a DIE that describes the given type. | |
9270 | ||
9271 | This routine must only be called for GCC type nodes that correspond to | |
9272 | Dwarf base (fundamental) types. */ | |
ec1e49cc | 9273 | |
30ade641 | 9274 | static dw_die_ref |
8ec3a57b | 9275 | base_type_die (tree type) |
30ade641 | 9276 | { |
19cb6b50 | 9277 | dw_die_ref base_type_result; |
19cb6b50 | 9278 | enum dwarf_type encoding; |
30ade641 | 9279 | |
8c3f468d | 9280 | if (TREE_CODE (type) == ERROR_MARK || TREE_CODE (type) == VOID_TYPE) |
30ade641 | 9281 | return 0; |
9282 | ||
9283 | switch (TREE_CODE (type)) | |
9284 | { | |
30ade641 | 9285 | case INTEGER_TYPE: |
e026e576 | 9286 | if (TYPE_STRING_FLAG (type)) |
30ade641 | 9287 | { |
78a8ed03 | 9288 | if (TYPE_UNSIGNED (type)) |
e026e576 | 9289 | encoding = DW_ATE_unsigned_char; |
5b67860b | 9290 | else |
e026e576 | 9291 | encoding = DW_ATE_signed_char; |
30ade641 | 9292 | } |
e026e576 | 9293 | else if (TYPE_UNSIGNED (type)) |
9294 | encoding = DW_ATE_unsigned; | |
5b67860b | 9295 | else |
e026e576 | 9296 | encoding = DW_ATE_signed; |
30ade641 | 9297 | break; |
9298 | ||
9299 | case REAL_TYPE: | |
069b07bf | 9300 | if (DECIMAL_FLOAT_MODE_P (TYPE_MODE (type))) |
9301 | encoding = DW_ATE_decimal_float; | |
9302 | else | |
9303 | encoding = DW_ATE_float; | |
30ade641 | 9304 | break; |
9305 | ||
06f0b99c | 9306 | case FIXED_POINT_TYPE: |
9307 | if (TYPE_UNSIGNED (type)) | |
06f0b99c | 9308 | encoding = DW_ATE_unsigned_fixed; |
fc0a87d6 | 9309 | else |
9310 | encoding = DW_ATE_signed_fixed; | |
06f0b99c | 9311 | break; |
9312 | ||
5b5abf88 | 9313 | /* Dwarf2 doesn't know anything about complex ints, so use |
9314 | a user defined type for it. */ | |
30ade641 | 9315 | case COMPLEX_TYPE: |
5b5abf88 | 9316 | if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE) |
9317 | encoding = DW_ATE_complex_float; | |
9318 | else | |
9319 | encoding = DW_ATE_lo_user; | |
30ade641 | 9320 | break; |
9321 | ||
9322 | case BOOLEAN_TYPE: | |
5b67860b | 9323 | /* GNU FORTRAN/Ada/C++ BOOLEAN type. */ |
9324 | encoding = DW_ATE_boolean; | |
30ade641 | 9325 | break; |
9326 | ||
9327 | default: | |
8c3f468d | 9328 | /* No other TREE_CODEs are Dwarf fundamental types. */ |
7bd4f6b6 | 9329 | gcc_unreachable (); |
30ade641 | 9330 | } |
9331 | ||
15cfae4e | 9332 | base_type_result = new_die (DW_TAG_base_type, comp_unit_die, type); |
155b05dc | 9333 | |
1524656f | 9334 | /* This probably indicates a bug. */ |
9335 | if (! TYPE_NAME (type)) | |
9336 | add_name_attribute (base_type_result, "__unknown__"); | |
9337 | ||
5b67860b | 9338 | add_AT_unsigned (base_type_result, DW_AT_byte_size, |
21638aad | 9339 | int_size_in_bytes (type)); |
5b67860b | 9340 | add_AT_unsigned (base_type_result, DW_AT_encoding, encoding); |
30ade641 | 9341 | |
9342 | return base_type_result; | |
9343 | } | |
9344 | ||
6ef828f9 | 9345 | /* Given a pointer to an arbitrary ..._TYPE tree node, return nonzero if the |
30ade641 | 9346 | given input type is a Dwarf "fundamental" type. Otherwise return null. */ |
ec1e49cc | 9347 | |
9348 | static inline int | |
8ec3a57b | 9349 | is_base_type (tree type) |
30ade641 | 9350 | { |
9351 | switch (TREE_CODE (type)) | |
9352 | { | |
9353 | case ERROR_MARK: | |
9354 | case VOID_TYPE: | |
9355 | case INTEGER_TYPE: | |
9356 | case REAL_TYPE: | |
06f0b99c | 9357 | case FIXED_POINT_TYPE: |
30ade641 | 9358 | case COMPLEX_TYPE: |
9359 | case BOOLEAN_TYPE: | |
30ade641 | 9360 | return 1; |
9361 | ||
30ade641 | 9362 | case ARRAY_TYPE: |
9363 | case RECORD_TYPE: | |
9364 | case UNION_TYPE: | |
9365 | case QUAL_UNION_TYPE: | |
9366 | case ENUMERAL_TYPE: | |
9367 | case FUNCTION_TYPE: | |
9368 | case METHOD_TYPE: | |
9369 | case POINTER_TYPE: | |
9370 | case REFERENCE_TYPE: | |
30ade641 | 9371 | case OFFSET_TYPE: |
9372 | case LANG_TYPE: | |
4405d230 | 9373 | case VECTOR_TYPE: |
30ade641 | 9374 | return 0; |
9375 | ||
9376 | default: | |
7bd4f6b6 | 9377 | gcc_unreachable (); |
30ade641 | 9378 | } |
ec1e49cc | 9379 | |
30ade641 | 9380 | return 0; |
9381 | } | |
9382 | ||
805e22b2 | 9383 | /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE |
9384 | node, return the size in bits for the type if it is a constant, or else | |
9385 | return the alignment for the type if the type's size is not constant, or | |
9386 | else return BITS_PER_WORD if the type actually turns out to be an | |
9387 | ERROR_MARK node. */ | |
9388 | ||
9389 | static inline unsigned HOST_WIDE_INT | |
5493cb9a | 9390 | simple_type_size_in_bits (const_tree type) |
805e22b2 | 9391 | { |
805e22b2 | 9392 | if (TREE_CODE (type) == ERROR_MARK) |
9393 | return BITS_PER_WORD; | |
9394 | else if (TYPE_SIZE (type) == NULL_TREE) | |
9395 | return 0; | |
9396 | else if (host_integerp (TYPE_SIZE (type), 1)) | |
9397 | return tree_low_cst (TYPE_SIZE (type), 1); | |
9398 | else | |
9399 | return TYPE_ALIGN (type); | |
9400 | } | |
9401 | ||
600dbd47 | 9402 | /* Return true if the debug information for the given type should be |
9403 | emitted as a subrange type. */ | |
9404 | ||
9405 | static inline bool | |
5493cb9a | 9406 | is_subrange_type (const_tree type) |
6114cbf0 | 9407 | { |
93c7db82 | 9408 | tree subtype = TREE_TYPE (type); |
9409 | ||
fd45b48c | 9410 | /* Subrange types are identified by the fact that they are integer |
9411 | types, and that they have a subtype which is either an integer type | |
9412 | or an enumeral type. */ | |
9413 | ||
9414 | if (TREE_CODE (type) != INTEGER_TYPE | |
9415 | || subtype == NULL_TREE) | |
9416 | return false; | |
9417 | ||
9418 | if (TREE_CODE (subtype) != INTEGER_TYPE | |
69c2baa9 | 9419 | && TREE_CODE (subtype) != ENUMERAL_TYPE |
9420 | && TREE_CODE (subtype) != BOOLEAN_TYPE) | |
fd45b48c | 9421 | return false; |
9422 | ||
62351b00 | 9423 | if (TREE_CODE (type) == TREE_CODE (subtype) |
9424 | && int_size_in_bytes (type) == int_size_in_bytes (subtype) | |
9425 | && TYPE_MIN_VALUE (type) != NULL | |
9426 | && TYPE_MIN_VALUE (subtype) != NULL | |
9427 | && tree_int_cst_equal (TYPE_MIN_VALUE (type), TYPE_MIN_VALUE (subtype)) | |
9428 | && TYPE_MAX_VALUE (type) != NULL | |
9429 | && TYPE_MAX_VALUE (subtype) != NULL | |
9430 | && tree_int_cst_equal (TYPE_MAX_VALUE (type), TYPE_MAX_VALUE (subtype))) | |
9431 | { | |
9432 | /* The type and its subtype have the same representation. If in | |
61a9389f | 9433 | addition the two types also have the same name, then the given |
9434 | type is not a subrange type, but rather a plain base type. */ | |
62351b00 | 9435 | /* FIXME: brobecker/2004-03-22: |
61a9389f | 9436 | Sizetype INTEGER_CSTs nodes are canonicalized. It should |
9437 | therefore be sufficient to check the TYPE_SIZE node pointers | |
9438 | rather than checking the actual size. Unfortunately, we have | |
9439 | found some cases, such as in the Ada "integer" type, where | |
9440 | this is not the case. Until this problem is solved, we need to | |
9441 | keep checking the actual size. */ | |
62351b00 | 9442 | tree type_name = TYPE_NAME (type); |
9443 | tree subtype_name = TYPE_NAME (subtype); | |
9444 | ||
9445 | if (type_name != NULL && TREE_CODE (type_name) == TYPE_DECL) | |
61a9389f | 9446 | type_name = DECL_NAME (type_name); |
62351b00 | 9447 | |
9448 | if (subtype_name != NULL && TREE_CODE (subtype_name) == TYPE_DECL) | |
61a9389f | 9449 | subtype_name = DECL_NAME (subtype_name); |
62351b00 | 9450 | |
9451 | if (type_name == subtype_name) | |
61a9389f | 9452 | return false; |
62351b00 | 9453 | } |
9454 | ||
fd45b48c | 9455 | return true; |
600dbd47 | 9456 | } |
9457 | ||
9458 | /* Given a pointer to a tree node for a subrange type, return a pointer | |
9459 | to a DIE that describes the given type. */ | |
9460 | ||
9461 | static dw_die_ref | |
a7011153 | 9462 | subrange_type_die (tree type, dw_die_ref context_die) |
600dbd47 | 9463 | { |
600dbd47 | 9464 | dw_die_ref subrange_die; |
6114cbf0 | 9465 | const HOST_WIDE_INT size_in_bytes = int_size_in_bytes (type); |
8ec3a57b | 9466 | |
a7011153 | 9467 | if (context_die == NULL) |
9468 | context_die = comp_unit_die; | |
9469 | ||
a7011153 | 9470 | subrange_die = new_die (DW_TAG_subrange_type, context_die, type); |
a84a50a5 | 9471 | |
1524656f | 9472 | if (int_size_in_bytes (TREE_TYPE (type)) != size_in_bytes) |
6114cbf0 | 9473 | { |
9474 | /* The size of the subrange type and its base type do not match, | |
61a9389f | 9475 | so we need to generate a size attribute for the subrange type. */ |
6114cbf0 | 9476 | add_AT_unsigned (subrange_die, DW_AT_byte_size, size_in_bytes); |
9477 | } | |
9478 | ||
600dbd47 | 9479 | if (TYPE_MIN_VALUE (type) != NULL) |
9480 | add_bound_info (subrange_die, DW_AT_lower_bound, | |
61a9389f | 9481 | TYPE_MIN_VALUE (type)); |
600dbd47 | 9482 | if (TYPE_MAX_VALUE (type) != NULL) |
9483 | add_bound_info (subrange_die, DW_AT_upper_bound, | |
61a9389f | 9484 | TYPE_MAX_VALUE (type)); |
600dbd47 | 9485 | |
9486 | return subrange_die; | |
9487 | } | |
9488 | ||
30ade641 | 9489 | /* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging |
9490 | entry that chains various modifiers in front of the given type. */ | |
ec1e49cc | 9491 | |
30ade641 | 9492 | static dw_die_ref |
8ec3a57b | 9493 | modified_type_die (tree type, int is_const_type, int is_volatile_type, |
9494 | dw_die_ref context_die) | |
30ade641 | 9495 | { |
19cb6b50 | 9496 | enum tree_code code = TREE_CODE (type); |
1524656f | 9497 | dw_die_ref mod_type_die; |
19cb6b50 | 9498 | dw_die_ref sub_die = NULL; |
9499 | tree item_type = NULL; | |
1524656f | 9500 | tree qualified_type; |
9501 | tree name; | |
9502 | ||
9503 | if (code == ERROR_MARK) | |
9504 | return NULL; | |
9505 | ||
9506 | /* See if we already have the appropriately qualified variant of | |
9507 | this type. */ | |
9508 | qualified_type | |
9509 | = get_qualified_type (type, | |
9510 | ((is_const_type ? TYPE_QUAL_CONST : 0) | |
9511 | | (is_volatile_type ? TYPE_QUAL_VOLATILE : 0))); | |
61a9389f | 9512 | |
1524656f | 9513 | /* If we do, then we can just use its DIE, if it exists. */ |
9514 | if (qualified_type) | |
30ade641 | 9515 | { |
1524656f | 9516 | mod_type_die = lookup_type_die (qualified_type); |
6efd403b | 9517 | if (mod_type_die) |
1524656f | 9518 | return mod_type_die; |
9519 | } | |
61a9389f | 9520 | |
1524656f | 9521 | name = qualified_type ? TYPE_NAME (qualified_type) : NULL; |
61a9389f | 9522 | |
1524656f | 9523 | /* Handle C typedef types. */ |
9524 | if (name && TREE_CODE (name) == TYPE_DECL && DECL_ORIGINAL_TYPE (name)) | |
9525 | { | |
9526 | tree dtype = TREE_TYPE (name); | |
61a9389f | 9527 | |
1524656f | 9528 | if (qualified_type == dtype) |
30ade641 | 9529 | { |
1524656f | 9530 | /* For a named type, use the typedef. */ |
9531 | gen_type_die (qualified_type, context_die); | |
9532 | return lookup_type_die (qualified_type); | |
30ade641 | 9533 | } |
37f26c2d | 9534 | else if (is_const_type < TYPE_READONLY (dtype) |
9535 | || is_volatile_type < TYPE_VOLATILE (dtype) | |
9536 | || (is_const_type <= TYPE_READONLY (dtype) | |
9537 | && is_volatile_type <= TYPE_VOLATILE (dtype) | |
9538 | && DECL_ORIGINAL_TYPE (name) != type)) | |
1524656f | 9539 | /* cv-unqualified version of named type. Just use the unnamed |
9540 | type to which it refers. */ | |
9541 | return modified_type_die (DECL_ORIGINAL_TYPE (name), | |
9542 | is_const_type, is_volatile_type, | |
9543 | context_die); | |
9544 | /* Else cv-qualified version of named type; fall through. */ | |
9545 | } | |
61a9389f | 9546 | |
1524656f | 9547 | if (is_const_type) |
9548 | { | |
9549 | mod_type_die = new_die (DW_TAG_const_type, comp_unit_die, type); | |
9550 | sub_die = modified_type_die (type, 0, is_volatile_type, context_die); | |
9551 | } | |
9552 | else if (is_volatile_type) | |
9553 | { | |
9554 | mod_type_die = new_die (DW_TAG_volatile_type, comp_unit_die, type); | |
9555 | sub_die = modified_type_die (type, 0, 0, context_die); | |
9556 | } | |
9557 | else if (code == POINTER_TYPE) | |
9558 | { | |
9559 | mod_type_die = new_die (DW_TAG_pointer_type, comp_unit_die, type); | |
9560 | add_AT_unsigned (mod_type_die, DW_AT_byte_size, | |
9561 | simple_type_size_in_bits (type) / BITS_PER_UNIT); | |
9562 | item_type = TREE_TYPE (type); | |
9563 | } | |
9564 | else if (code == REFERENCE_TYPE) | |
9565 | { | |
9566 | mod_type_die = new_die (DW_TAG_reference_type, comp_unit_die, type); | |
9567 | add_AT_unsigned (mod_type_die, DW_AT_byte_size, | |
9568 | simple_type_size_in_bits (type) / BITS_PER_UNIT); | |
9569 | item_type = TREE_TYPE (type); | |
9570 | } | |
9571 | else if (is_subrange_type (type)) | |
9572 | { | |
9573 | mod_type_die = subrange_type_die (type, context_die); | |
9574 | item_type = TREE_TYPE (type); | |
9575 | } | |
9576 | else if (is_base_type (type)) | |
9577 | mod_type_die = base_type_die (type); | |
9578 | else | |
9579 | { | |
9580 | gen_type_die (type, context_die); | |
61a9389f | 9581 | |
1524656f | 9582 | /* We have to get the type_main_variant here (and pass that to the |
9583 | `lookup_type_die' routine) because the ..._TYPE node we have | |
9584 | might simply be a *copy* of some original type node (where the | |
9585 | copy was created to help us keep track of typedef names) and | |
9586 | that copy might have a different TYPE_UID from the original | |
9587 | ..._TYPE node. */ | |
9588 | if (TREE_CODE (type) != VECTOR_TYPE) | |
9589 | return lookup_type_die (type_main_variant (type)); | |
30ade641 | 9590 | else |
1524656f | 9591 | /* Vectors have the debugging information in the type, |
9592 | not the main variant. */ | |
9593 | return lookup_type_die (type); | |
9594 | } | |
61a9389f | 9595 | |
1524656f | 9596 | /* Builtin types don't have a DECL_ORIGINAL_TYPE. For those, |
9597 | don't output a DW_TAG_typedef, since there isn't one in the | |
9598 | user's program; just attach a DW_AT_name to the type. */ | |
9599 | if (name | |
029dbf29 | 9600 | && (TREE_CODE (name) != TYPE_DECL |
9601 | || (TREE_TYPE (name) == qualified_type && DECL_NAME (name)))) | |
1524656f | 9602 | { |
9603 | if (TREE_CODE (name) == TYPE_DECL) | |
9604 | /* Could just call add_name_and_src_coords_attributes here, | |
9605 | but since this is a builtin type it doesn't have any | |
9606 | useful source coordinates anyway. */ | |
9607 | name = DECL_NAME (name); | |
9608 | add_name_attribute (mod_type_die, IDENTIFIER_POINTER (name)); | |
30ade641 | 9609 | } |
61a9389f | 9610 | |
1524656f | 9611 | if (qualified_type) |
9612 | equate_type_number_to_die (qualified_type, mod_type_die); | |
ec1e49cc | 9613 | |
39ee7a4a | 9614 | if (item_type) |
ec1e49cc | 9615 | /* We must do this after the equate_type_number_to_die call, in case |
9616 | this is a recursive type. This ensures that the modified_type_die | |
9617 | recursion will terminate even if the type is recursive. Recursive | |
9618 | types are possible in Ada. */ | |
9619 | sub_die = modified_type_die (item_type, | |
9620 | TYPE_READONLY (item_type), | |
9621 | TYPE_VOLATILE (item_type), | |
9622 | context_die); | |
9623 | ||
30ade641 | 9624 | if (sub_die != NULL) |
ec1e49cc | 9625 | add_AT_die_ref (mod_type_die, DW_AT_type, sub_die); |
9626 | ||
30ade641 | 9627 | return mod_type_die; |
9628 | } | |
9629 | ||
30ade641 | 9630 | /* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is |
1e625a2e | 9631 | an enumerated type. */ |
ec1e49cc | 9632 | |
9633 | static inline int | |
5493cb9a | 9634 | type_is_enum (const_tree type) |
30ade641 | 9635 | { |
9636 | return TREE_CODE (type) == ENUMERAL_TYPE; | |
9637 | } | |
9638 | ||
7f3ca0ce | 9639 | /* Return the DBX register number described by a given RTL node. */ |
4b72e226 | 9640 | |
9641 | static unsigned int | |
5493cb9a | 9642 | dbx_reg_number (const_rtx rtl) |
4b72e226 | 9643 | { |
19cb6b50 | 9644 | unsigned regno = REGNO (rtl); |
4b72e226 | 9645 | |
7bd4f6b6 | 9646 | gcc_assert (regno < FIRST_PSEUDO_REGISTER); |
4b72e226 | 9647 | |
12d886b8 | 9648 | #ifdef LEAF_REG_REMAP |
203898cb | 9649 | if (current_function_uses_only_leaf_regs) |
9650 | { | |
9651 | int leaf_reg = LEAF_REG_REMAP (regno); | |
9652 | if (leaf_reg != -1) | |
9653 | regno = (unsigned) leaf_reg; | |
9654 | } | |
12d886b8 | 9655 | #endif |
9656 | ||
86e12d28 | 9657 | return DBX_REGISTER_NUMBER (regno); |
4b72e226 | 9658 | } |
9659 | ||
fd51758c | 9660 | /* Optionally add a DW_OP_piece term to a location description expression. |
9661 | DW_OP_piece is only added if the location description expression already | |
9662 | doesn't end with DW_OP_piece. */ | |
9663 | ||
9664 | static void | |
9665 | add_loc_descr_op_piece (dw_loc_descr_ref *list_head, int size) | |
9666 | { | |
9667 | dw_loc_descr_ref loc; | |
9668 | ||
9669 | if (*list_head != NULL) | |
9670 | { | |
9671 | /* Find the end of the chain. */ | |
9672 | for (loc = *list_head; loc->dw_loc_next != NULL; loc = loc->dw_loc_next) | |
9673 | ; | |
9674 | ||
9675 | if (loc->dw_loc_opc != DW_OP_piece) | |
9676 | loc->dw_loc_next = new_loc_descr (DW_OP_piece, size, 0); | |
9677 | } | |
9678 | } | |
9679 | ||
86e12d28 | 9680 | /* Return a location descriptor that designates a machine register or |
9754a2f0 | 9681 | zero if there is none. */ |
ec1e49cc | 9682 | |
30ade641 | 9683 | static dw_loc_descr_ref |
d53bb226 | 9684 | reg_loc_descriptor (rtx rtl, enum var_init_status initialized) |
30ade641 | 9685 | { |
9754a2f0 | 9686 | rtx regs; |
ec1e49cc | 9687 | |
86e12d28 | 9688 | if (REGNO (rtl) >= FIRST_PSEUDO_REGISTER) |
9689 | return 0; | |
9690 | ||
883b2e73 | 9691 | regs = targetm.dwarf_register_span (rtl); |
9754a2f0 | 9692 | |
12d886b8 | 9693 | if (hard_regno_nregs[REGNO (rtl)][GET_MODE (rtl)] > 1 || regs) |
d53bb226 | 9694 | return multiple_reg_loc_descriptor (rtl, regs, initialized); |
9754a2f0 | 9695 | else |
d53bb226 | 9696 | return one_reg_loc_descriptor (dbx_reg_number (rtl), initialized); |
9754a2f0 | 9697 | } |
9698 | ||
9699 | /* Return a location descriptor that designates a machine register for | |
9700 | a given hard register number. */ | |
9701 | ||
9702 | static dw_loc_descr_ref | |
d53bb226 | 9703 | one_reg_loc_descriptor (unsigned int regno, enum var_init_status initialized) |
9754a2f0 | 9704 | { |
dde9bb3b | 9705 | dw_loc_descr_ref reg_loc_descr = new_reg_loc_descr (regno, 0); |
d53bb226 | 9706 | |
9707 | if (initialized == VAR_INIT_STATUS_UNINITIALIZED) | |
9708 | add_loc_descr (®_loc_descr, new_loc_descr (DW_OP_GNU_uninit, 0, 0)); | |
9709 | ||
9710 | return reg_loc_descr; | |
9754a2f0 | 9711 | } |
9712 | ||
9713 | /* Given an RTL of a register, return a location descriptor that | |
9714 | designates a value that spans more than one register. */ | |
9715 | ||
9716 | static dw_loc_descr_ref | |
39c7766b | 9717 | multiple_reg_loc_descriptor (rtx rtl, rtx regs, |
d53bb226 | 9718 | enum var_init_status initialized) |
9754a2f0 | 9719 | { |
9720 | int nregs, size, i; | |
9721 | unsigned reg; | |
9722 | dw_loc_descr_ref loc_result = NULL; | |
ec1e49cc | 9723 | |
b6ea71e9 | 9724 | reg = REGNO (rtl); |
9725 | #ifdef LEAF_REG_REMAP | |
203898cb | 9726 | if (current_function_uses_only_leaf_regs) |
9727 | { | |
9728 | int leaf_reg = LEAF_REG_REMAP (reg); | |
9729 | if (leaf_reg != -1) | |
9730 | reg = (unsigned) leaf_reg; | |
9731 | } | |
b6ea71e9 | 9732 | #endif |
9733 | gcc_assert ((unsigned) DBX_REGISTER_NUMBER (reg) == dbx_reg_number (rtl)); | |
7f3ca0ce | 9734 | nregs = hard_regno_nregs[REGNO (rtl)][GET_MODE (rtl)]; |
9754a2f0 | 9735 | |
9736 | /* Simple, contiguous registers. */ | |
9737 | if (regs == NULL_RTX) | |
9738 | { | |
9739 | size = GET_MODE_SIZE (GET_MODE (rtl)) / nregs; | |
9740 | ||
9741 | loc_result = NULL; | |
9742 | while (nregs--) | |
9743 | { | |
9744 | dw_loc_descr_ref t; | |
9745 | ||
d53bb226 | 9746 | t = one_reg_loc_descriptor (DBX_REGISTER_NUMBER (reg), |
9747 | VAR_INIT_STATUS_INITIALIZED); | |
9754a2f0 | 9748 | add_loc_descr (&loc_result, t); |
4719779b | 9749 | add_loc_descr_op_piece (&loc_result, size); |
a4920475 | 9750 | ++reg; |
9754a2f0 | 9751 | } |
9752 | return loc_result; | |
9753 | } | |
9754 | ||
9755 | /* Now onto stupid register sets in non contiguous locations. */ | |
9756 | ||
7bd4f6b6 | 9757 | gcc_assert (GET_CODE (regs) == PARALLEL); |
9754a2f0 | 9758 | |
9759 | size = GET_MODE_SIZE (GET_MODE (XVECEXP (regs, 0, 0))); | |
9760 | loc_result = NULL; | |
9761 | ||
9762 | for (i = 0; i < XVECLEN (regs, 0); ++i) | |
9763 | { | |
9764 | dw_loc_descr_ref t; | |
9765 | ||
d53bb226 | 9766 | t = one_reg_loc_descriptor (REGNO (XVECEXP (regs, 0, i)), |
9767 | VAR_INIT_STATUS_INITIALIZED); | |
9754a2f0 | 9768 | add_loc_descr (&loc_result, t); |
9769 | size = GET_MODE_SIZE (GET_MODE (XVECEXP (regs, 0, 0))); | |
4719779b | 9770 | add_loc_descr_op_piece (&loc_result, size); |
9754a2f0 | 9771 | } |
d53bb226 | 9772 | |
9773 | if (loc_result && initialized == VAR_INIT_STATUS_UNINITIALIZED) | |
9774 | add_loc_descr (&loc_result, new_loc_descr (DW_OP_GNU_uninit, 0, 0)); | |
30ade641 | 9775 | return loc_result; |
9776 | } | |
9777 | ||
27a7a23a | 9778 | #endif /* DWARF2_DEBUGGING_INFO */ |
9779 | ||
9780 | #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO) | |
9781 | ||
9ed904da | 9782 | /* Return a location descriptor that designates a constant. */ |
9783 | ||
9784 | static dw_loc_descr_ref | |
8ec3a57b | 9785 | int_loc_descriptor (HOST_WIDE_INT i) |
9ed904da | 9786 | { |
9787 | enum dwarf_location_atom op; | |
9788 | ||
9789 | /* Pick the smallest representation of a constant, rather than just | |
9790 | defaulting to the LEB encoding. */ | |
9791 | if (i >= 0) | |
9792 | { | |
9793 | if (i <= 31) | |
8458f4ca | 9794 | op = (enum dwarf_location_atom) (DW_OP_lit0 + i); |
9ed904da | 9795 | else if (i <= 0xff) |
9796 | op = DW_OP_const1u; | |
9797 | else if (i <= 0xffff) | |
9798 | op = DW_OP_const2u; | |
9799 | else if (HOST_BITS_PER_WIDE_INT == 32 | |
9800 | || i <= 0xffffffff) | |
9801 | op = DW_OP_const4u; | |
9802 | else | |
9803 | op = DW_OP_constu; | |
9804 | } | |
9805 | else | |
9806 | { | |
9807 | if (i >= -0x80) | |
9808 | op = DW_OP_const1s; | |
9809 | else if (i >= -0x8000) | |
9810 | op = DW_OP_const2s; | |
9811 | else if (HOST_BITS_PER_WIDE_INT == 32 | |
9812 | || i >= -0x80000000) | |
9813 | op = DW_OP_const4s; | |
9814 | else | |
9815 | op = DW_OP_consts; | |
9816 | } | |
9817 | ||
9818 | return new_loc_descr (op, i, 0); | |
9819 | } | |
27a7a23a | 9820 | #endif |
9821 | ||
9822 | #ifdef DWARF2_DEBUGGING_INFO | |
9ed904da | 9823 | |
30ade641 | 9824 | /* Return a location descriptor that designates a base+offset location. */ |
ec1e49cc | 9825 | |
30ade641 | 9826 | static dw_loc_descr_ref |
d53bb226 | 9827 | based_loc_descr (rtx reg, HOST_WIDE_INT offset, |
9828 | enum var_init_status initialized) | |
30ade641 | 9829 | { |
da72c083 | 9830 | unsigned int regno; |
d53bb226 | 9831 | dw_loc_descr_ref result; |
27a7a23a | 9832 | dw_fde_ref fde = current_fde (); |
12d886b8 | 9833 | |
9834 | /* We only use "frame base" when we're sure we're talking about the | |
9835 | post-prologue local stack frame. We do this by *not* running | |
9836 | register elimination until this point, and recognizing the special | |
9837 | argument pointer and soft frame pointer rtx's. */ | |
9838 | if (reg == arg_pointer_rtx || reg == frame_pointer_rtx) | |
9839 | { | |
da72c083 | 9840 | rtx elim = eliminate_regs (reg, VOIDmode, NULL_RTX); |
12d886b8 | 9841 | |
da72c083 | 9842 | if (elim != reg) |
9843 | { | |
9844 | if (GET_CODE (elim) == PLUS) | |
9845 | { | |
9846 | offset += INTVAL (XEXP (elim, 1)); | |
9847 | elim = XEXP (elim, 0); | |
9848 | } | |
27a7a23a | 9849 | gcc_assert ((SUPPORTS_STACK_ALIGNMENT |
9850 | && (elim == hard_frame_pointer_rtx | |
9851 | || elim == stack_pointer_rtx)) | |
9852 | || elim == (frame_pointer_needed | |
9853 | ? hard_frame_pointer_rtx | |
9854 | : stack_pointer_rtx)); | |
9855 | ||
9856 | /* If drap register is used to align stack, use frame | |
9857 | pointer + offset to access stack variables. If stack | |
9858 | is aligned without drap, use stack pointer + offset to | |
9859 | access stack variables. */ | |
7b70fdf7 | 9860 | if (crtl->stack_realign_tried |
27a7a23a | 9861 | && cfa.reg == HARD_FRAME_POINTER_REGNUM |
9862 | && reg == frame_pointer_rtx) | |
9863 | { | |
9864 | int base_reg | |
9865 | = DWARF_FRAME_REGNUM (cfa.indirect | |
9866 | ? HARD_FRAME_POINTER_REGNUM | |
9867 | : STACK_POINTER_REGNUM); | |
dde9bb3b | 9868 | return new_reg_loc_descr (base_reg, offset); |
27a7a23a | 9869 | } |
12d886b8 | 9870 | |
27a7a23a | 9871 | offset += frame_pointer_fb_offset; |
61a9389f | 9872 | return new_loc_descr (DW_OP_fbreg, offset, 0); |
da72c083 | 9873 | } |
12d886b8 | 9874 | } |
27a7a23a | 9875 | else if (fde |
9876 | && fde->drap_reg != INVALID_REGNUM | |
9877 | && (fde->drap_reg == REGNO (reg) | |
9878 | || fde->vdrap_reg == REGNO (reg))) | |
9879 | { | |
9880 | /* Use cfa+offset to represent the location of arguments passed | |
9881 | on stack when drap is used to align stack. */ | |
9882 | return new_loc_descr (DW_OP_fbreg, offset, 0); | |
9883 | } | |
ec1e49cc | 9884 | |
da72c083 | 9885 | regno = dbx_reg_number (reg); |
9886 | if (regno <= 31) | |
b9c74b4d | 9887 | result = new_loc_descr ((enum dwarf_location_atom) (DW_OP_breg0 + regno), |
9888 | offset, 0); | |
da72c083 | 9889 | else |
d53bb226 | 9890 | result = new_loc_descr (DW_OP_bregx, regno, offset); |
9891 | ||
9892 | if (initialized == VAR_INIT_STATUS_UNINITIALIZED) | |
9893 | add_loc_descr (&result, new_loc_descr (DW_OP_GNU_uninit, 0, 0)); | |
9894 | ||
9895 | return result; | |
30ade641 | 9896 | } |
9897 | ||
9898 | /* Return true if this RTL expression describes a base+offset calculation. */ | |
ec1e49cc | 9899 | |
9900 | static inline int | |
5493cb9a | 9901 | is_based_loc (const_rtx rtl) |
30ade641 | 9902 | { |
7cc7e163 | 9903 | return (GET_CODE (rtl) == PLUS |
8ad4c111 | 9904 | && ((REG_P (XEXP (rtl, 0)) |
7cc7e163 | 9905 | && REGNO (XEXP (rtl, 0)) < FIRST_PSEUDO_REGISTER |
9906 | && GET_CODE (XEXP (rtl, 1)) == CONST_INT))); | |
30ade641 | 9907 | } |
9908 | ||
3ab1d710 | 9909 | /* Return a descriptor that describes the concatenation of N locations |
9910 | used to form the address of a memory location. */ | |
9911 | ||
9912 | static dw_loc_descr_ref | |
d53bb226 | 9913 | concatn_mem_loc_descriptor (rtx concatn, enum machine_mode mode, |
9914 | enum var_init_status initialized) | |
3ab1d710 | 9915 | { |
9916 | unsigned int i; | |
9917 | dw_loc_descr_ref cc_loc_result = NULL; | |
9918 | unsigned int n = XVECLEN (concatn, 0); | |
9919 | ||
9920 | for (i = 0; i < n; ++i) | |
9921 | { | |
9922 | dw_loc_descr_ref ref; | |
9923 | rtx x = XVECEXP (concatn, 0, i); | |
9924 | ||
d53bb226 | 9925 | ref = mem_loc_descriptor (x, mode, VAR_INIT_STATUS_INITIALIZED); |
3ab1d710 | 9926 | if (ref == NULL) |
9927 | return NULL; | |
9928 | ||
9929 | add_loc_descr (&cc_loc_result, ref); | |
9930 | add_loc_descr_op_piece (&cc_loc_result, GET_MODE_SIZE (GET_MODE (x))); | |
9931 | } | |
9932 | ||
d53bb226 | 9933 | if (cc_loc_result && initialized == VAR_INIT_STATUS_UNINITIALIZED) |
9934 | add_loc_descr (&cc_loc_result, new_loc_descr (DW_OP_GNU_uninit, 0, 0)); | |
9935 | ||
3ab1d710 | 9936 | return cc_loc_result; |
9937 | } | |
9938 | ||
f7c2629f | 9939 | /* Try to handle TLS MEMs, for which mem_loc_descriptor on XEXP (mem, 0) |
9940 | failed. */ | |
9941 | ||
9942 | static dw_loc_descr_ref | |
9943 | tls_mem_loc_descriptor (rtx mem) | |
9944 | { | |
9945 | tree base; | |
1938132c | 9946 | dw_loc_descr_ref loc_result; |
f7c2629f | 9947 | |
9948 | if (MEM_EXPR (mem) == NULL_TREE || MEM_OFFSET (mem) == NULL_RTX) | |
9949 | return NULL; | |
9950 | ||
9951 | base = get_base_address (MEM_EXPR (mem)); | |
9952 | if (base == NULL | |
9953 | || TREE_CODE (base) != VAR_DECL | |
9954 | || !DECL_THREAD_LOCAL_P (base)) | |
9955 | return NULL; | |
9956 | ||
9957 | loc_result = loc_descriptor_from_tree_1 (MEM_EXPR (mem), 2); | |
9958 | if (loc_result == NULL) | |
9959 | return NULL; | |
9960 | ||
9961 | if (INTVAL (MEM_OFFSET (mem))) | |
1938132c | 9962 | loc_descr_plus_const (&loc_result, INTVAL (MEM_OFFSET (mem))); |
f7c2629f | 9963 | |
9964 | return loc_result; | |
9965 | } | |
9966 | ||
30ade641 | 9967 | /* The following routine converts the RTL for a variable or parameter |
9968 | (resident in memory) into an equivalent Dwarf representation of a | |
9969 | mechanism for getting the address of that same variable onto the top of a | |
9970 | hypothetical "address evaluation" stack. | |
ec1e49cc | 9971 | |
30ade641 | 9972 | When creating memory location descriptors, we are effectively transforming |
9973 | the RTL for a memory-resident object into its Dwarf postfix expression | |
9974 | equivalent. This routine recursively descends an RTL tree, turning | |
92a94502 | 9975 | it into Dwarf postfix code as it goes. |
9976 | ||
9977 | MODE is the mode of the memory reference, needed to handle some | |
86e12d28 | 9978 | autoincrement addressing modes. |
9979 | ||
12d886b8 | 9980 | CAN_USE_FBREG is a flag whether we can use DW_AT_frame_base in the |
9981 | location list for RTL. | |
b2025850 | 9982 | |
86e12d28 | 9983 | Return 0 if we can't represent the location. */ |
ec1e49cc | 9984 | |
30ade641 | 9985 | static dw_loc_descr_ref |
d53bb226 | 9986 | mem_loc_descriptor (rtx rtl, enum machine_mode mode, |
9987 | enum var_init_status initialized) | |
30ade641 | 9988 | { |
9989 | dw_loc_descr_ref mem_loc_result = NULL; | |
3122a117 | 9990 | enum dwarf_location_atom op; |
86e12d28 | 9991 | |
f80d1bcd | 9992 | /* Note that for a dynamically sized array, the location we will generate a |
30ade641 | 9993 | description of here will be the lowest numbered location which is |
9994 | actually within the array. That's *not* necessarily the same as the | |
9995 | zeroth element of the array. */ | |
ec1e49cc | 9996 | |
883b2e73 | 9997 | rtl = targetm.delegitimize_address (rtl); |
eacbfaac | 9998 | |
30ade641 | 9999 | switch (GET_CODE (rtl)) |
10000 | { | |
92a94502 | 10001 | case POST_INC: |
10002 | case POST_DEC: | |
93fbe1f3 | 10003 | case POST_MODIFY: |
92a94502 | 10004 | /* POST_INC and POST_DEC can be handled just like a SUBREG. So we |
10005 | just fall into the SUBREG code. */ | |
10006 | ||
8c3f468d | 10007 | /* ... fall through ... */ |
92a94502 | 10008 | |
30ade641 | 10009 | case SUBREG: |
10010 | /* The case of a subreg may arise when we have a local (register) | |
c83a163c | 10011 | variable or a formal (register) parameter which doesn't quite fill |
10012 | up an entire register. For now, just assume that it is | |
10013 | legitimate to make the Dwarf info refer to the whole register which | |
10014 | contains the given subreg. */ | |
822e27f9 | 10015 | rtl = XEXP (rtl, 0); |
ec1e49cc | 10016 | |
8c3f468d | 10017 | /* ... fall through ... */ |
30ade641 | 10018 | |
10019 | case REG: | |
10020 | /* Whenever a register number forms a part of the description of the | |
c83a163c | 10021 | method for calculating the (dynamic) address of a memory resident |
10022 | object, DWARF rules require the register number be referred to as | |
10023 | a "base register". This distinction is not based in any way upon | |
10024 | what category of register the hardware believes the given register | |
10025 | belongs to. This is strictly DWARF terminology we're dealing with | |
10026 | here. Note that in cases where the location of a memory-resident | |
10027 | data object could be expressed as: OP_ADD (OP_BASEREG (basereg), | |
10028 | OP_CONST (0)) the actual DWARF location descriptor that we generate | |
10029 | may just be OP_BASEREG (basereg). This may look deceptively like | |
10030 | the object in question was allocated to a register (rather than in | |
10031 | memory) so DWARF consumers need to be aware of the subtle | |
10032 | distinction between OP_REG and OP_BASEREG. */ | |
86e12d28 | 10033 | if (REGNO (rtl) < FIRST_PSEUDO_REGISTER) |
d53bb226 | 10034 | mem_loc_result = based_loc_descr (rtl, 0, VAR_INIT_STATUS_INITIALIZED); |
5a821301 | 10035 | else if (stack_realign_drap |
10036 | && crtl->drap_reg | |
10037 | && crtl->args.internal_arg_pointer == rtl | |
10038 | && REGNO (crtl->drap_reg) < FIRST_PSEUDO_REGISTER) | |
10039 | { | |
10040 | /* If RTL is internal_arg_pointer, which has been optimized | |
10041 | out, use DRAP instead. */ | |
10042 | mem_loc_result = based_loc_descr (crtl->drap_reg, 0, | |
10043 | VAR_INIT_STATUS_INITIALIZED); | |
10044 | } | |
30ade641 | 10045 | break; |
10046 | ||
10047 | case MEM: | |
d53bb226 | 10048 | mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0), GET_MODE (rtl), |
10049 | VAR_INIT_STATUS_INITIALIZED); | |
f7c2629f | 10050 | if (mem_loc_result == NULL) |
10051 | mem_loc_result = tls_mem_loc_descriptor (rtl); | |
86e12d28 | 10052 | if (mem_loc_result != 0) |
10053 | add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_deref, 0, 0)); | |
30ade641 | 10054 | break; |
10055 | ||
095ec610 | 10056 | case LO_SUM: |
10057 | rtl = XEXP (rtl, 1); | |
10058 | ||
10059 | /* ... fall through ... */ | |
10060 | ||
9ed904da | 10061 | case LABEL_REF: |
10062 | /* Some ports can transform a symbol ref into a label ref, because | |
8ec3a57b | 10063 | the symbol ref is too far away and has to be dumped into a constant |
10064 | pool. */ | |
30ade641 | 10065 | case CONST: |
10066 | case SYMBOL_REF: | |
7012770b | 10067 | /* Alternatively, the symbol in the constant pool might be referenced |
efdf6c61 | 10068 | by a different symbol. */ |
8c3f468d | 10069 | if (GET_CODE (rtl) == SYMBOL_REF && CONSTANT_POOL_ADDRESS_P (rtl)) |
dfc1ac47 | 10070 | { |
7ad1c520 | 10071 | bool marked; |
10072 | rtx tmp = get_pool_constant_mark (rtl, &marked); | |
8c3f468d | 10073 | |
7012770b | 10074 | if (GET_CODE (tmp) == SYMBOL_REF) |
7ad1c520 | 10075 | { |
10076 | rtl = tmp; | |
10077 | if (CONSTANT_POOL_ADDRESS_P (tmp)) | |
10078 | get_pool_constant_mark (tmp, &marked); | |
10079 | else | |
10080 | marked = true; | |
10081 | } | |
10082 | ||
10083 | /* If all references to this pool constant were optimized away, | |
10084 | it was not output and thus we can't represent it. | |
10085 | FIXME: might try to use DW_OP_const_value here, though | |
10086 | DW_OP_piece complicates it. */ | |
10087 | if (!marked) | |
10088 | return 0; | |
dfc1ac47 | 10089 | } |
10090 | ||
30ade641 | 10091 | mem_loc_result = new_loc_descr (DW_OP_addr, 0, 0); |
10092 | mem_loc_result->dw_loc_oprnd1.val_class = dw_val_class_addr; | |
7facaa35 | 10093 | mem_loc_result->dw_loc_oprnd1.v.val_addr = rtl; |
62aedc4c | 10094 | VEC_safe_push (rtx, gc, used_rtx_array, rtl); |
30ade641 | 10095 | break; |
10096 | ||
93fbe1f3 | 10097 | case PRE_MODIFY: |
10098 | /* Extract the PLUS expression nested inside and fall into | |
c83a163c | 10099 | PLUS code below. */ |
93fbe1f3 | 10100 | rtl = XEXP (rtl, 1); |
10101 | goto plus; | |
10102 | ||
92a94502 | 10103 | case PRE_INC: |
10104 | case PRE_DEC: | |
10105 | /* Turn these into a PLUS expression and fall into the PLUS code | |
10106 | below. */ | |
10107 | rtl = gen_rtx_PLUS (word_mode, XEXP (rtl, 0), | |
10108 | GEN_INT (GET_CODE (rtl) == PRE_INC | |
f80d1bcd | 10109 | ? GET_MODE_UNIT_SIZE (mode) |
10110 | : -GET_MODE_UNIT_SIZE (mode))); | |
10111 | ||
8c3f468d | 10112 | /* ... fall through ... */ |
92a94502 | 10113 | |
30ade641 | 10114 | case PLUS: |
93fbe1f3 | 10115 | plus: |
30ade641 | 10116 | if (is_based_loc (rtl)) |
12d886b8 | 10117 | mem_loc_result = based_loc_descr (XEXP (rtl, 0), |
d53bb226 | 10118 | INTVAL (XEXP (rtl, 1)), |
10119 | VAR_INIT_STATUS_INITIALIZED); | |
30ade641 | 10120 | else |
10121 | { | |
d53bb226 | 10122 | mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0), mode, |
10123 | VAR_INIT_STATUS_INITIALIZED); | |
86e12d28 | 10124 | if (mem_loc_result == 0) |
10125 | break; | |
9ed904da | 10126 | |
1938132c | 10127 | if (GET_CODE (XEXP (rtl, 1)) == CONST_INT) |
10128 | loc_descr_plus_const (&mem_loc_result, INTVAL (XEXP (rtl, 1))); | |
9ed904da | 10129 | else |
10130 | { | |
f7c2629f | 10131 | dw_loc_descr_ref mem_loc_result2 |
10132 | = mem_loc_descriptor (XEXP (rtl, 1), mode, | |
10133 | VAR_INIT_STATUS_INITIALIZED); | |
10134 | if (mem_loc_result2 == 0) | |
10135 | break; | |
10136 | add_loc_descr (&mem_loc_result, mem_loc_result2); | |
9ed904da | 10137 | add_loc_descr (&mem_loc_result, |
10138 | new_loc_descr (DW_OP_plus, 0, 0)); | |
10139 | } | |
30ade641 | 10140 | } |
10141 | break; | |
10142 | ||
3122a117 | 10143 | /* If a pseudo-reg is optimized away, it is possible for it to |
10144 | be replaced with a MEM containing a multiply or shift. */ | |
a10de18c | 10145 | case MULT: |
3122a117 | 10146 | op = DW_OP_mul; |
10147 | goto do_binop; | |
10148 | ||
10149 | case ASHIFT: | |
10150 | op = DW_OP_shl; | |
10151 | goto do_binop; | |
8ff30ff6 | 10152 | |
3122a117 | 10153 | case ASHIFTRT: |
10154 | op = DW_OP_shra; | |
10155 | goto do_binop; | |
10156 | ||
10157 | case LSHIFTRT: | |
10158 | op = DW_OP_shr; | |
10159 | goto do_binop; | |
10160 | ||
10161 | do_binop: | |
86e12d28 | 10162 | { |
d53bb226 | 10163 | dw_loc_descr_ref op0 = mem_loc_descriptor (XEXP (rtl, 0), mode, |
10164 | VAR_INIT_STATUS_INITIALIZED); | |
10165 | dw_loc_descr_ref op1 = mem_loc_descriptor (XEXP (rtl, 1), mode, | |
10166 | VAR_INIT_STATUS_INITIALIZED); | |
86e12d28 | 10167 | |
10168 | if (op0 == 0 || op1 == 0) | |
10169 | break; | |
10170 | ||
10171 | mem_loc_result = op0; | |
10172 | add_loc_descr (&mem_loc_result, op1); | |
3122a117 | 10173 | add_loc_descr (&mem_loc_result, new_loc_descr (op, 0, 0)); |
86e12d28 | 10174 | break; |
10175 | } | |
a10de18c | 10176 | |
30ade641 | 10177 | case CONST_INT: |
9ed904da | 10178 | mem_loc_result = int_loc_descriptor (INTVAL (rtl)); |
30ade641 | 10179 | break; |
10180 | ||
3ab1d710 | 10181 | case CONCATN: |
39c7766b | 10182 | mem_loc_result = concatn_mem_loc_descriptor (rtl, mode, |
d53bb226 | 10183 | VAR_INIT_STATUS_INITIALIZED); |
3ab1d710 | 10184 | break; |
10185 | ||
f7c2629f | 10186 | case UNSPEC: |
10187 | /* If delegitimize_address couldn't do anything with the UNSPEC, we | |
10188 | can't express it in the debug info. This can happen e.g. with some | |
10189 | TLS UNSPECs. */ | |
10190 | break; | |
10191 | ||
30ade641 | 10192 | default: |
7bd4f6b6 | 10193 | gcc_unreachable (); |
30ade641 | 10194 | } |
ec1e49cc | 10195 | |
d53bb226 | 10196 | if (mem_loc_result && initialized == VAR_INIT_STATUS_UNINITIALIZED) |
10197 | add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_GNU_uninit, 0, 0)); | |
10198 | ||
30ade641 | 10199 | return mem_loc_result; |
10200 | } | |
10201 | ||
ad87de1e | 10202 | /* Return a descriptor that describes the concatenation of two locations. |
fe829d4e | 10203 | This is typically a complex variable. */ |
10204 | ||
10205 | static dw_loc_descr_ref | |
d53bb226 | 10206 | concat_loc_descriptor (rtx x0, rtx x1, enum var_init_status initialized) |
fe829d4e | 10207 | { |
10208 | dw_loc_descr_ref cc_loc_result = NULL; | |
d53bb226 | 10209 | dw_loc_descr_ref x0_ref = loc_descriptor (x0, VAR_INIT_STATUS_INITIALIZED); |
10210 | dw_loc_descr_ref x1_ref = loc_descriptor (x1, VAR_INIT_STATUS_INITIALIZED); | |
fe829d4e | 10211 | |
86e12d28 | 10212 | if (x0_ref == 0 || x1_ref == 0) |
10213 | return 0; | |
10214 | ||
10215 | cc_loc_result = x0_ref; | |
4719779b | 10216 | add_loc_descr_op_piece (&cc_loc_result, GET_MODE_SIZE (GET_MODE (x0))); |
fe829d4e | 10217 | |
86e12d28 | 10218 | add_loc_descr (&cc_loc_result, x1_ref); |
4719779b | 10219 | add_loc_descr_op_piece (&cc_loc_result, GET_MODE_SIZE (GET_MODE (x1))); |
fe829d4e | 10220 | |
d53bb226 | 10221 | if (initialized == VAR_INIT_STATUS_UNINITIALIZED) |
10222 | add_loc_descr (&cc_loc_result, new_loc_descr (DW_OP_GNU_uninit, 0, 0)); | |
10223 | ||
fe829d4e | 10224 | return cc_loc_result; |
10225 | } | |
10226 | ||
1a6a0f2a | 10227 | /* Return a descriptor that describes the concatenation of N |
10228 | locations. */ | |
10229 | ||
10230 | static dw_loc_descr_ref | |
d53bb226 | 10231 | concatn_loc_descriptor (rtx concatn, enum var_init_status initialized) |
1a6a0f2a | 10232 | { |
10233 | unsigned int i; | |
10234 | dw_loc_descr_ref cc_loc_result = NULL; | |
10235 | unsigned int n = XVECLEN (concatn, 0); | |
10236 | ||
10237 | for (i = 0; i < n; ++i) | |
10238 | { | |
10239 | dw_loc_descr_ref ref; | |
10240 | rtx x = XVECEXP (concatn, 0, i); | |
10241 | ||
d53bb226 | 10242 | ref = loc_descriptor (x, VAR_INIT_STATUS_INITIALIZED); |
1a6a0f2a | 10243 | if (ref == NULL) |
10244 | return NULL; | |
10245 | ||
10246 | add_loc_descr (&cc_loc_result, ref); | |
10247 | add_loc_descr_op_piece (&cc_loc_result, GET_MODE_SIZE (GET_MODE (x))); | |
10248 | } | |
10249 | ||
d53bb226 | 10250 | if (cc_loc_result && initialized == VAR_INIT_STATUS_UNINITIALIZED) |
10251 | add_loc_descr (&cc_loc_result, new_loc_descr (DW_OP_GNU_uninit, 0, 0)); | |
10252 | ||
1a6a0f2a | 10253 | return cc_loc_result; |
10254 | } | |
10255 | ||
30ade641 | 10256 | /* Output a proper Dwarf location descriptor for a variable or parameter |
10257 | which is either allocated in a register or in a memory location. For a | |
10258 | register, we just generate an OP_REG and the register number. For a | |
10259 | memory location we provide a Dwarf postfix expression describing how to | |
86e12d28 | 10260 | generate the (dynamic) address of the object onto the address stack. |
10261 | ||
10262 | If we don't know how to describe it, return 0. */ | |
ec1e49cc | 10263 | |
30ade641 | 10264 | static dw_loc_descr_ref |
d53bb226 | 10265 | loc_descriptor (rtx rtl, enum var_init_status initialized) |
30ade641 | 10266 | { |
10267 | dw_loc_descr_ref loc_result = NULL; | |
86e12d28 | 10268 | |
30ade641 | 10269 | switch (GET_CODE (rtl)) |
10270 | { | |
10271 | case SUBREG: | |
30ade641 | 10272 | /* The case of a subreg may arise when we have a local (register) |
c83a163c | 10273 | variable or a formal (register) parameter which doesn't quite fill |
10274 | up an entire register. For now, just assume that it is | |
10275 | legitimate to make the Dwarf info refer to the whole register which | |
10276 | contains the given subreg. */ | |
701e46d0 | 10277 | rtl = SUBREG_REG (rtl); |
ec1e49cc | 10278 | |
8c3f468d | 10279 | /* ... fall through ... */ |
30ade641 | 10280 | |
10281 | case REG: | |
d53bb226 | 10282 | loc_result = reg_loc_descriptor (rtl, initialized); |
30ade641 | 10283 | break; |
10284 | ||
10285 | case MEM: | |
d53bb226 | 10286 | loc_result = mem_loc_descriptor (XEXP (rtl, 0), GET_MODE (rtl), |
10287 | initialized); | |
f7c2629f | 10288 | if (loc_result == NULL) |
10289 | loc_result = tls_mem_loc_descriptor (rtl); | |
30ade641 | 10290 | break; |
10291 | ||
fe829d4e | 10292 | case CONCAT: |
d53bb226 | 10293 | loc_result = concat_loc_descriptor (XEXP (rtl, 0), XEXP (rtl, 1), |
10294 | initialized); | |
fe829d4e | 10295 | break; |
10296 | ||
1a6a0f2a | 10297 | case CONCATN: |
d53bb226 | 10298 | loc_result = concatn_loc_descriptor (rtl, initialized); |
1a6a0f2a | 10299 | break; |
10300 | ||
b2025850 | 10301 | case VAR_LOCATION: |
10302 | /* Single part. */ | |
10303 | if (GET_CODE (XEXP (rtl, 1)) != PARALLEL) | |
10304 | { | |
d53bb226 | 10305 | loc_result = loc_descriptor (XEXP (XEXP (rtl, 1), 0), initialized); |
afcf285e | 10306 | break; |
b2025850 | 10307 | } |
b2025850 | 10308 | |
afcf285e | 10309 | rtl = XEXP (rtl, 1); |
10310 | /* FALLTHRU */ | |
b2025850 | 10311 | |
afcf285e | 10312 | case PARALLEL: |
10313 | { | |
10314 | rtvec par_elems = XVEC (rtl, 0); | |
10315 | int num_elem = GET_NUM_ELEM (par_elems); | |
10316 | enum machine_mode mode; | |
10317 | int i; | |
10318 | ||
10319 | /* Create the first one, so we have something to add to. */ | |
d53bb226 | 10320 | loc_result = loc_descriptor (XEXP (RTVEC_ELT (par_elems, 0), 0), |
10321 | initialized); | |
f7c2629f | 10322 | if (loc_result == NULL) |
10323 | return NULL; | |
afcf285e | 10324 | mode = GET_MODE (XEXP (RTVEC_ELT (par_elems, 0), 0)); |
4719779b | 10325 | add_loc_descr_op_piece (&loc_result, GET_MODE_SIZE (mode)); |
afcf285e | 10326 | for (i = 1; i < num_elem; i++) |
10327 | { | |
10328 | dw_loc_descr_ref temp; | |
10329 | ||
d53bb226 | 10330 | temp = loc_descriptor (XEXP (RTVEC_ELT (par_elems, i), 0), |
10331 | initialized); | |
f7c2629f | 10332 | if (temp == NULL) |
10333 | return NULL; | |
afcf285e | 10334 | add_loc_descr (&loc_result, temp); |
10335 | mode = GET_MODE (XEXP (RTVEC_ELT (par_elems, i), 0)); | |
4719779b | 10336 | add_loc_descr_op_piece (&loc_result, GET_MODE_SIZE (mode)); |
afcf285e | 10337 | } |
10338 | } | |
b2025850 | 10339 | break; |
10340 | ||
30ade641 | 10341 | default: |
7bd4f6b6 | 10342 | gcc_unreachable (); |
30ade641 | 10343 | } |
ec1e49cc | 10344 | |
30ade641 | 10345 | return loc_result; |
10346 | } | |
10347 | ||
8c3f468d | 10348 | /* Similar, but generate the descriptor from trees instead of rtl. This comes |
afcf285e | 10349 | up particularly with variable length arrays. WANT_ADDRESS is 2 if this is |
10350 | a top-level invocation of loc_descriptor_from_tree; is 1 if this is not a | |
10351 | top-level invocation, and we require the address of LOC; is 0 if we require | |
10352 | the value of LOC. */ | |
9ed904da | 10353 | |
10354 | static dw_loc_descr_ref | |
afcf285e | 10355 | loc_descriptor_from_tree_1 (tree loc, int want_address) |
9ed904da | 10356 | { |
86e12d28 | 10357 | dw_loc_descr_ref ret, ret1; |
afcf285e | 10358 | int have_address = 0; |
9ed904da | 10359 | enum dwarf_location_atom op; |
10360 | ||
10361 | /* ??? Most of the time we do not take proper care for sign/zero | |
10362 | extending the values properly. Hopefully this won't be a real | |
10363 | problem... */ | |
10364 | ||
10365 | switch (TREE_CODE (loc)) | |
10366 | { | |
10367 | case ERROR_MARK: | |
86e12d28 | 10368 | return 0; |
9ed904da | 10369 | |
86e12d28 | 10370 | case PLACEHOLDER_EXPR: |
a3915b32 | 10371 | /* This case involves extracting fields from an object to determine the |
10372 | position of other fields. We don't try to encode this here. The | |
10373 | only user of this is Ada, which encodes the needed information using | |
10374 | the names of types. */ | |
86e12d28 | 10375 | return 0; |
a3915b32 | 10376 | |
dff29840 | 10377 | case CALL_EXPR: |
10378 | return 0; | |
10379 | ||
7ddf4456 | 10380 | case PREINCREMENT_EXPR: |
10381 | case PREDECREMENT_EXPR: | |
10382 | case POSTINCREMENT_EXPR: | |
10383 | case POSTDECREMENT_EXPR: | |
10384 | /* There are no opcodes for these operations. */ | |
10385 | return 0; | |
10386 | ||
dff29840 | 10387 | case ADDR_EXPR: |
afcf285e | 10388 | /* If we already want an address, there's nothing we can do. */ |
10389 | if (want_address) | |
10390 | return 0; | |
dff29840 | 10391 | |
afcf285e | 10392 | /* Otherwise, process the argument and look for the address. */ |
10393 | return loc_descriptor_from_tree_1 (TREE_OPERAND (loc, 0), 1); | |
dff29840 | 10394 | |
9ed904da | 10395 | case VAR_DECL: |
1b53eb20 | 10396 | if (DECL_THREAD_LOCAL_P (loc)) |
931e9893 | 10397 | { |
10398 | rtx rtl; | |
b9c74b4d | 10399 | enum dwarf_location_atom first_op; |
10400 | enum dwarf_location_atom second_op; | |
931e9893 | 10401 | |
38475469 | 10402 | if (targetm.have_tls) |
10403 | { | |
10404 | /* If this is not defined, we have no way to emit the | |
10405 | data. */ | |
10406 | if (!targetm.asm_out.output_dwarf_dtprel) | |
10407 | return 0; | |
10408 | ||
10409 | /* The way DW_OP_GNU_push_tls_address is specified, we | |
10410 | can only look up addresses of objects in the current | |
10411 | module. */ | |
f7c2629f | 10412 | if (DECL_EXTERNAL (loc) && !targetm.binds_local_p (loc)) |
38475469 | 10413 | return 0; |
b9c74b4d | 10414 | first_op = (enum dwarf_location_atom) INTERNAL_DW_OP_tls_addr; |
38475469 | 10415 | second_op = DW_OP_GNU_push_tls_address; |
10416 | } | |
10417 | else | |
10418 | { | |
10419 | if (!targetm.emutls.debug_form_tls_address) | |
10420 | return 0; | |
10421 | loc = emutls_decl (loc); | |
10422 | first_op = DW_OP_addr; | |
10423 | second_op = DW_OP_form_tls_address; | |
10424 | } | |
39c7766b | 10425 | |
931e9893 | 10426 | rtl = rtl_for_decl_location (loc); |
10427 | if (rtl == NULL_RTX) | |
10428 | return 0; | |
10429 | ||
e16ceb8e | 10430 | if (!MEM_P (rtl)) |
931e9893 | 10431 | return 0; |
10432 | rtl = XEXP (rtl, 0); | |
10433 | if (! CONSTANT_P (rtl)) | |
10434 | return 0; | |
10435 | ||
38475469 | 10436 | ret = new_loc_descr (first_op, 0, 0); |
931e9893 | 10437 | ret->dw_loc_oprnd1.val_class = dw_val_class_addr; |
10438 | ret->dw_loc_oprnd1.v.val_addr = rtl; | |
39c7766b | 10439 | |
38475469 | 10440 | ret1 = new_loc_descr (second_op, 0, 0); |
931e9893 | 10441 | add_loc_descr (&ret, ret1); |
10442 | ||
afcf285e | 10443 | have_address = 1; |
931e9893 | 10444 | break; |
10445 | } | |
afcf285e | 10446 | /* FALLTHRU */ |
931e9893 | 10447 | |
9ed904da | 10448 | case PARM_DECL: |
75fa4f82 | 10449 | if (DECL_HAS_VALUE_EXPR_P (loc)) |
10450 | return loc_descriptor_from_tree_1 (DECL_VALUE_EXPR (loc), | |
10451 | want_address); | |
afcf285e | 10452 | /* FALLTHRU */ |
10453 | ||
4ee9c684 | 10454 | case RESULT_DECL: |
cfdab332 | 10455 | case FUNCTION_DECL: |
9ed904da | 10456 | { |
10457 | rtx rtl = rtl_for_decl_location (loc); | |
9ed904da | 10458 | |
0ff98c8f | 10459 | if (rtl == NULL_RTX) |
86e12d28 | 10460 | return 0; |
61a9389f | 10461 | else if (GET_CODE (rtl) == CONST_INT) |
afcf285e | 10462 | { |
10463 | HOST_WIDE_INT val = INTVAL (rtl); | |
10464 | if (TYPE_UNSIGNED (TREE_TYPE (loc))) | |
10465 | val &= GET_MODE_MASK (DECL_MODE (loc)); | |
10466 | ret = int_loc_descriptor (val); | |
10467 | } | |
10468 | else if (GET_CODE (rtl) == CONST_STRING) | |
10469 | return 0; | |
0ff98c8f | 10470 | else if (CONSTANT_P (rtl)) |
9ed904da | 10471 | { |
10472 | ret = new_loc_descr (DW_OP_addr, 0, 0); | |
10473 | ret->dw_loc_oprnd1.val_class = dw_val_class_addr; | |
10474 | ret->dw_loc_oprnd1.v.val_addr = rtl; | |
9ed904da | 10475 | } |
10476 | else | |
10477 | { | |
afcf285e | 10478 | enum machine_mode mode; |
10479 | ||
10480 | /* Certain constructs can only be represented at top-level. */ | |
10481 | if (want_address == 2) | |
d53bb226 | 10482 | return loc_descriptor (rtl, VAR_INIT_STATUS_INITIALIZED); |
f3546830 | 10483 | |
afcf285e | 10484 | mode = GET_MODE (rtl); |
e16ceb8e | 10485 | if (MEM_P (rtl)) |
9ed904da | 10486 | { |
9ed904da | 10487 | rtl = XEXP (rtl, 0); |
afcf285e | 10488 | have_address = 1; |
9ed904da | 10489 | } |
d53bb226 | 10490 | ret = mem_loc_descriptor (rtl, mode, VAR_INIT_STATUS_INITIALIZED); |
9ed904da | 10491 | } |
10492 | } | |
10493 | break; | |
10494 | ||
10495 | case INDIRECT_REF: | |
afcf285e | 10496 | ret = loc_descriptor_from_tree_1 (TREE_OPERAND (loc, 0), 0); |
10497 | have_address = 1; | |
9ed904da | 10498 | break; |
10499 | ||
3de30178 | 10500 | case COMPOUND_EXPR: |
afcf285e | 10501 | return loc_descriptor_from_tree_1 (TREE_OPERAND (loc, 1), want_address); |
3de30178 | 10502 | |
72dd6141 | 10503 | CASE_CONVERT: |
f96c43fb | 10504 | case VIEW_CONVERT_EXPR: |
a3915b32 | 10505 | case SAVE_EXPR: |
75a70cf9 | 10506 | case MODIFY_EXPR: |
10507 | return loc_descriptor_from_tree_1 (TREE_OPERAND (loc, 0), want_address); | |
f9038ab4 | 10508 | |
9ed904da | 10509 | case COMPONENT_REF: |
10510 | case BIT_FIELD_REF: | |
10511 | case ARRAY_REF: | |
ba04d9d5 | 10512 | case ARRAY_RANGE_REF: |
9ed904da | 10513 | { |
10514 | tree obj, offset; | |
10515 | HOST_WIDE_INT bitsize, bitpos, bytepos; | |
10516 | enum machine_mode mode; | |
10517 | int volatilep; | |
1e8e9920 | 10518 | int unsignedp = TYPE_UNSIGNED (TREE_TYPE (loc)); |
9ed904da | 10519 | |
10520 | obj = get_inner_reference (loc, &bitsize, &bitpos, &offset, &mode, | |
e7e9416e | 10521 | &unsignedp, &volatilep, false); |
86e12d28 | 10522 | |
10523 | if (obj == loc) | |
10524 | return 0; | |
10525 | ||
afcf285e | 10526 | ret = loc_descriptor_from_tree_1 (obj, 1); |
86e12d28 | 10527 | if (ret == 0 |
8c3f468d | 10528 | || bitpos % BITS_PER_UNIT != 0 || bitsize % BITS_PER_UNIT != 0) |
86e12d28 | 10529 | return 0; |
9ed904da | 10530 | |
10531 | if (offset != NULL_TREE) | |
10532 | { | |
10533 | /* Variable offset. */ | |
f7c2629f | 10534 | ret1 = loc_descriptor_from_tree_1 (offset, 0); |
10535 | if (ret1 == 0) | |
10536 | return 0; | |
10537 | add_loc_descr (&ret, ret1); | |
9ed904da | 10538 | add_loc_descr (&ret, new_loc_descr (DW_OP_plus, 0, 0)); |
10539 | } | |
10540 | ||
9ed904da | 10541 | bytepos = bitpos / BITS_PER_UNIT; |
1938132c | 10542 | loc_descr_plus_const (&ret, bytepos); |
afcf285e | 10543 | |
10544 | have_address = 1; | |
9ed904da | 10545 | break; |
10546 | } | |
10547 | ||
10548 | case INTEGER_CST: | |
10549 | if (host_integerp (loc, 0)) | |
10550 | ret = int_loc_descriptor (tree_low_cst (loc, 0)); | |
86e12d28 | 10551 | else |
10552 | return 0; | |
9ed904da | 10553 | break; |
9ed904da | 10554 | |
15b7bb11 | 10555 | case CONSTRUCTOR: |
10556 | { | |
6e326506 | 10557 | /* Get an RTL for this, if something has been emitted. */ |
10558 | rtx rtl = lookup_constant_def (loc); | |
10559 | enum machine_mode mode; | |
10560 | ||
afcf285e | 10561 | if (!rtl || !MEM_P (rtl)) |
6e326506 | 10562 | return 0; |
10563 | mode = GET_MODE (rtl); | |
10564 | rtl = XEXP (rtl, 0); | |
d53bb226 | 10565 | ret = mem_loc_descriptor (rtl, mode, VAR_INIT_STATUS_INITIALIZED); |
afcf285e | 10566 | have_address = 1; |
15b7bb11 | 10567 | break; |
10568 | } | |
10569 | ||
bc70bd5e | 10570 | case TRUTH_AND_EXPR: |
cfd66c04 | 10571 | case TRUTH_ANDIF_EXPR: |
9ed904da | 10572 | case BIT_AND_EXPR: |
10573 | op = DW_OP_and; | |
10574 | goto do_binop; | |
86e12d28 | 10575 | |
cfd66c04 | 10576 | case TRUTH_XOR_EXPR: |
9ed904da | 10577 | case BIT_XOR_EXPR: |
10578 | op = DW_OP_xor; | |
10579 | goto do_binop; | |
86e12d28 | 10580 | |
cfd66c04 | 10581 | case TRUTH_OR_EXPR: |
10582 | case TRUTH_ORIF_EXPR: | |
9ed904da | 10583 | case BIT_IOR_EXPR: |
10584 | op = DW_OP_or; | |
10585 | goto do_binop; | |
86e12d28 | 10586 | |
d7f71e5a | 10587 | case FLOOR_DIV_EXPR: |
10588 | case CEIL_DIV_EXPR: | |
10589 | case ROUND_DIV_EXPR: | |
9ed904da | 10590 | case TRUNC_DIV_EXPR: |
10591 | op = DW_OP_div; | |
10592 | goto do_binop; | |
86e12d28 | 10593 | |
9ed904da | 10594 | case MINUS_EXPR: |
10595 | op = DW_OP_minus; | |
10596 | goto do_binop; | |
86e12d28 | 10597 | |
d7f71e5a | 10598 | case FLOOR_MOD_EXPR: |
10599 | case CEIL_MOD_EXPR: | |
10600 | case ROUND_MOD_EXPR: | |
9ed904da | 10601 | case TRUNC_MOD_EXPR: |
10602 | op = DW_OP_mod; | |
10603 | goto do_binop; | |
86e12d28 | 10604 | |
9ed904da | 10605 | case MULT_EXPR: |
10606 | op = DW_OP_mul; | |
10607 | goto do_binop; | |
86e12d28 | 10608 | |
9ed904da | 10609 | case LSHIFT_EXPR: |
10610 | op = DW_OP_shl; | |
10611 | goto do_binop; | |
86e12d28 | 10612 | |
9ed904da | 10613 | case RSHIFT_EXPR: |
1e8e9920 | 10614 | op = (TYPE_UNSIGNED (TREE_TYPE (loc)) ? DW_OP_shr : DW_OP_shra); |
9ed904da | 10615 | goto do_binop; |
86e12d28 | 10616 | |
0de36bdb | 10617 | case POINTER_PLUS_EXPR: |
9ed904da | 10618 | case PLUS_EXPR: |
10619 | if (TREE_CODE (TREE_OPERAND (loc, 1)) == INTEGER_CST | |
10620 | && host_integerp (TREE_OPERAND (loc, 1), 0)) | |
10621 | { | |
afcf285e | 10622 | ret = loc_descriptor_from_tree_1 (TREE_OPERAND (loc, 0), 0); |
86e12d28 | 10623 | if (ret == 0) |
10624 | return 0; | |
10625 | ||
1938132c | 10626 | loc_descr_plus_const (&ret, tree_low_cst (TREE_OPERAND (loc, 1), 0)); |
9ed904da | 10627 | break; |
10628 | } | |
86e12d28 | 10629 | |
9ed904da | 10630 | op = DW_OP_plus; |
10631 | goto do_binop; | |
8c3f468d | 10632 | |
9ed904da | 10633 | case LE_EXPR: |
78a8ed03 | 10634 | if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (loc, 0)))) |
86e12d28 | 10635 | return 0; |
10636 | ||
9ed904da | 10637 | op = DW_OP_le; |
10638 | goto do_binop; | |
86e12d28 | 10639 | |
9ed904da | 10640 | case GE_EXPR: |
78a8ed03 | 10641 | if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (loc, 0)))) |
86e12d28 | 10642 | return 0; |
10643 | ||
9ed904da | 10644 | op = DW_OP_ge; |
10645 | goto do_binop; | |
86e12d28 | 10646 | |
9ed904da | 10647 | case LT_EXPR: |
78a8ed03 | 10648 | if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (loc, 0)))) |
86e12d28 | 10649 | return 0; |
10650 | ||
9ed904da | 10651 | op = DW_OP_lt; |
10652 | goto do_binop; | |
86e12d28 | 10653 | |
9ed904da | 10654 | case GT_EXPR: |
78a8ed03 | 10655 | if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (loc, 0)))) |
86e12d28 | 10656 | return 0; |
10657 | ||
9ed904da | 10658 | op = DW_OP_gt; |
10659 | goto do_binop; | |
86e12d28 | 10660 | |
9ed904da | 10661 | case EQ_EXPR: |
10662 | op = DW_OP_eq; | |
10663 | goto do_binop; | |
86e12d28 | 10664 | |
9ed904da | 10665 | case NE_EXPR: |
10666 | op = DW_OP_ne; | |
10667 | goto do_binop; | |
10668 | ||
10669 | do_binop: | |
afcf285e | 10670 | ret = loc_descriptor_from_tree_1 (TREE_OPERAND (loc, 0), 0); |
10671 | ret1 = loc_descriptor_from_tree_1 (TREE_OPERAND (loc, 1), 0); | |
86e12d28 | 10672 | if (ret == 0 || ret1 == 0) |
10673 | return 0; | |
10674 | ||
10675 | add_loc_descr (&ret, ret1); | |
9ed904da | 10676 | add_loc_descr (&ret, new_loc_descr (op, 0, 0)); |
10677 | break; | |
10678 | ||
cfd66c04 | 10679 | case TRUTH_NOT_EXPR: |
9ed904da | 10680 | case BIT_NOT_EXPR: |
10681 | op = DW_OP_not; | |
10682 | goto do_unop; | |
86e12d28 | 10683 | |
9ed904da | 10684 | case ABS_EXPR: |
10685 | op = DW_OP_abs; | |
10686 | goto do_unop; | |
86e12d28 | 10687 | |
9ed904da | 10688 | case NEGATE_EXPR: |
10689 | op = DW_OP_neg; | |
10690 | goto do_unop; | |
10691 | ||
10692 | do_unop: | |
afcf285e | 10693 | ret = loc_descriptor_from_tree_1 (TREE_OPERAND (loc, 0), 0); |
86e12d28 | 10694 | if (ret == 0) |
10695 | return 0; | |
10696 | ||
9ed904da | 10697 | add_loc_descr (&ret, new_loc_descr (op, 0, 0)); |
10698 | break; | |
10699 | ||
93823dba | 10700 | case MIN_EXPR: |
9ed904da | 10701 | case MAX_EXPR: |
93823dba | 10702 | { |
61a9389f | 10703 | const enum tree_code code = |
10704 | TREE_CODE (loc) == MIN_EXPR ? GT_EXPR : LT_EXPR; | |
93823dba | 10705 | |
61a9389f | 10706 | loc = build3 (COND_EXPR, TREE_TYPE (loc), |
b55f9493 | 10707 | build2 (code, integer_type_node, |
10708 | TREE_OPERAND (loc, 0), TREE_OPERAND (loc, 1)), | |
61a9389f | 10709 | TREE_OPERAND (loc, 1), TREE_OPERAND (loc, 0)); |
93823dba | 10710 | } |
8c3f468d | 10711 | |
04641143 | 10712 | /* ... fall through ... */ |
9ed904da | 10713 | |
10714 | case COND_EXPR: | |
10715 | { | |
86e12d28 | 10716 | dw_loc_descr_ref lhs |
afcf285e | 10717 | = loc_descriptor_from_tree_1 (TREE_OPERAND (loc, 1), 0); |
86e12d28 | 10718 | dw_loc_descr_ref rhs |
afcf285e | 10719 | = loc_descriptor_from_tree_1 (TREE_OPERAND (loc, 2), 0); |
9ed904da | 10720 | dw_loc_descr_ref bra_node, jump_node, tmp; |
10721 | ||
afcf285e | 10722 | ret = loc_descriptor_from_tree_1 (TREE_OPERAND (loc, 0), 0); |
86e12d28 | 10723 | if (ret == 0 || lhs == 0 || rhs == 0) |
10724 | return 0; | |
10725 | ||
9ed904da | 10726 | bra_node = new_loc_descr (DW_OP_bra, 0, 0); |
10727 | add_loc_descr (&ret, bra_node); | |
10728 | ||
86e12d28 | 10729 | add_loc_descr (&ret, rhs); |
9ed904da | 10730 | jump_node = new_loc_descr (DW_OP_skip, 0, 0); |
10731 | add_loc_descr (&ret, jump_node); | |
10732 | ||
86e12d28 | 10733 | add_loc_descr (&ret, lhs); |
9ed904da | 10734 | bra_node->dw_loc_oprnd1.val_class = dw_val_class_loc; |
86e12d28 | 10735 | bra_node->dw_loc_oprnd1.v.val_loc = lhs; |
9ed904da | 10736 | |
10737 | /* ??? Need a node to point the skip at. Use a nop. */ | |
10738 | tmp = new_loc_descr (DW_OP_nop, 0, 0); | |
10739 | add_loc_descr (&ret, tmp); | |
10740 | jump_node->dw_loc_oprnd1.val_class = dw_val_class_loc; | |
10741 | jump_node->dw_loc_oprnd1.v.val_loc = tmp; | |
10742 | } | |
10743 | break; | |
10744 | ||
c98c6570 | 10745 | case FIX_TRUNC_EXPR: |
c98c6570 | 10746 | return 0; |
10747 | ||
9ed904da | 10748 | default: |
76d1c62d | 10749 | /* Leave front-end specific codes as simply unknown. This comes |
10750 | up, for instance, with the C STMT_EXPR. */ | |
10751 | if ((unsigned int) TREE_CODE (loc) | |
61a9389f | 10752 | >= (unsigned int) LAST_AND_UNUSED_TREE_CODE) |
76d1c62d | 10753 | return 0; |
10754 | ||
13346250 | 10755 | #ifdef ENABLE_CHECKING |
76d1c62d | 10756 | /* Otherwise this is a generic code; we should just lists all of |
89f18f73 | 10757 | these explicitly. We forgot one. */ |
7bd4f6b6 | 10758 | gcc_unreachable (); |
13346250 | 10759 | #else |
10760 | /* In a release build, we want to degrade gracefully: better to | |
10761 | generate incomplete debugging information than to crash. */ | |
10762 | return NULL; | |
10763 | #endif | |
9ed904da | 10764 | } |
10765 | ||
86e12d28 | 10766 | /* Show if we can't fill the request for an address. */ |
afcf285e | 10767 | if (want_address && !have_address) |
86e12d28 | 10768 | return 0; |
9ed904da | 10769 | |
10770 | /* If we've got an address and don't want one, dereference. */ | |
9338678e | 10771 | if (!want_address && have_address && ret) |
9ed904da | 10772 | { |
86e12d28 | 10773 | HOST_WIDE_INT size = int_size_in_bytes (TREE_TYPE (loc)); |
10774 | ||
10775 | if (size > DWARF2_ADDR_SIZE || size == -1) | |
10776 | return 0; | |
8c3f468d | 10777 | else if (size == DWARF2_ADDR_SIZE) |
9ed904da | 10778 | op = DW_OP_deref; |
10779 | else | |
10780 | op = DW_OP_deref_size; | |
86e12d28 | 10781 | |
10782 | add_loc_descr (&ret, new_loc_descr (op, size, 0)); | |
9ed904da | 10783 | } |
10784 | ||
10785 | return ret; | |
10786 | } | |
10787 | ||
afcf285e | 10788 | static inline dw_loc_descr_ref |
10789 | loc_descriptor_from_tree (tree loc) | |
10790 | { | |
10791 | return loc_descriptor_from_tree_1 (loc, 2); | |
10792 | } | |
10793 | ||
5d844ba2 | 10794 | /* Given a value, round it up to the lowest multiple of `boundary' |
30ade641 | 10795 | which is not less than the value itself. */ |
ec1e49cc | 10796 | |
5d844ba2 | 10797 | static inline HOST_WIDE_INT |
8ec3a57b | 10798 | ceiling (HOST_WIDE_INT value, unsigned int boundary) |
30ade641 | 10799 | { |
10800 | return (((value + boundary - 1) / boundary) * boundary); | |
10801 | } | |
10802 | ||
10803 | /* Given a pointer to what is assumed to be a FIELD_DECL node, return a | |
10804 | pointer to the declared type for the relevant field variable, or return | |
10805 | `integer_type_node' if the given node turns out to be an | |
10806 | ERROR_MARK node. */ | |
ec1e49cc | 10807 | |
10808 | static inline tree | |
5493cb9a | 10809 | field_type (const_tree decl) |
30ade641 | 10810 | { |
19cb6b50 | 10811 | tree type; |
30ade641 | 10812 | |
10813 | if (TREE_CODE (decl) == ERROR_MARK) | |
10814 | return integer_type_node; | |
10815 | ||
10816 | type = DECL_BIT_FIELD_TYPE (decl); | |
ec1e49cc | 10817 | if (type == NULL_TREE) |
30ade641 | 10818 | type = TREE_TYPE (decl); |
10819 | ||
10820 | return type; | |
10821 | } | |
10822 | ||
2180a0af | 10823 | /* Given a pointer to a tree node, return the alignment in bits for |
10824 | it, or else return BITS_PER_WORD if the node actually turns out to | |
10825 | be an ERROR_MARK node. */ | |
ec1e49cc | 10826 | |
10827 | static inline unsigned | |
5493cb9a | 10828 | simple_type_align_in_bits (const_tree type) |
30ade641 | 10829 | { |
10830 | return (TREE_CODE (type) != ERROR_MARK) ? TYPE_ALIGN (type) : BITS_PER_WORD; | |
10831 | } | |
10832 | ||
2180a0af | 10833 | static inline unsigned |
5493cb9a | 10834 | simple_decl_align_in_bits (const_tree decl) |
2180a0af | 10835 | { |
10836 | return (TREE_CODE (decl) != ERROR_MARK) ? DECL_ALIGN (decl) : BITS_PER_WORD; | |
10837 | } | |
10838 | ||
71b5358c | 10839 | /* Return the result of rounding T up to ALIGN. */ |
10840 | ||
10841 | static inline HOST_WIDE_INT | |
10842 | round_up_to_align (HOST_WIDE_INT t, unsigned int align) | |
10843 | { | |
10844 | /* We must be careful if T is negative because HOST_WIDE_INT can be | |
10845 | either "above" or "below" unsigned int as per the C promotion | |
10846 | rules, depending on the host, thus making the signedness of the | |
10847 | direct multiplication and division unpredictable. */ | |
10848 | unsigned HOST_WIDE_INT u = (unsigned HOST_WIDE_INT) t; | |
10849 | ||
10850 | u += align - 1; | |
10851 | u /= align; | |
10852 | u *= align; | |
10853 | ||
10854 | return (HOST_WIDE_INT) u; | |
10855 | } | |
10856 | ||
8c3f468d | 10857 | /* Given a pointer to a FIELD_DECL, compute and return the byte offset of the |
10858 | lowest addressed byte of the "containing object" for the given FIELD_DECL, | |
10859 | or return 0 if we are unable to determine what that offset is, either | |
10860 | because the argument turns out to be a pointer to an ERROR_MARK node, or | |
10861 | because the offset is actually variable. (We can't handle the latter case | |
10862 | just yet). */ | |
ec1e49cc | 10863 | |
5d844ba2 | 10864 | static HOST_WIDE_INT |
5493cb9a | 10865 | field_byte_offset (const_tree decl) |
30ade641 | 10866 | { |
5d844ba2 | 10867 | HOST_WIDE_INT object_offset_in_bits; |
5d844ba2 | 10868 | HOST_WIDE_INT bitpos_int; |
30ade641 | 10869 | |
10870 | if (TREE_CODE (decl) == ERROR_MARK) | |
10871 | return 0; | |
8ff30ff6 | 10872 | |
7bd4f6b6 | 10873 | gcc_assert (TREE_CODE (decl) == FIELD_DECL); |
30ade641 | 10874 | |
f80d1bcd | 10875 | /* We cannot yet cope with fields whose positions are variable, so |
30ade641 | 10876 | for now, when we see such things, we simply return 0. Someday, we may |
10877 | be able to handle such cases, but it will be damn difficult. */ | |
5d844ba2 | 10878 | if (! host_integerp (bit_position (decl), 0)) |
30ade641 | 10879 | return 0; |
155b05dc | 10880 | |
5d844ba2 | 10881 | bitpos_int = int_bit_position (decl); |
30ade641 | 10882 | |
feb5f1b1 | 10883 | #ifdef PCC_BITFIELD_TYPE_MATTERS |
10884 | if (PCC_BITFIELD_TYPE_MATTERS) | |
10885 | { | |
10886 | tree type; | |
10887 | tree field_size_tree; | |
10888 | HOST_WIDE_INT deepest_bitpos; | |
10889 | unsigned HOST_WIDE_INT field_size_in_bits; | |
10890 | unsigned int type_align_in_bits; | |
10891 | unsigned int decl_align_in_bits; | |
10892 | unsigned HOST_WIDE_INT type_size_in_bits; | |
30ade641 | 10893 | |
feb5f1b1 | 10894 | type = field_type (decl); |
0bae362c | 10895 | type_size_in_bits = simple_type_size_in_bits (type); |
10896 | type_align_in_bits = simple_type_align_in_bits (type); | |
10897 | ||
feb5f1b1 | 10898 | field_size_tree = DECL_SIZE (decl); |
30ade641 | 10899 | |
feb5f1b1 | 10900 | /* The size could be unspecified if there was an error, or for |
10901 | a flexible array member. */ | |
0bae362c | 10902 | if (!field_size_tree) |
feb5f1b1 | 10903 | field_size_tree = bitsize_zero_node; |
10904 | ||
0bae362c | 10905 | /* If the size of the field is not constant, use the type size. */ |
feb5f1b1 | 10906 | if (host_integerp (field_size_tree, 1)) |
10907 | field_size_in_bits = tree_low_cst (field_size_tree, 1); | |
10908 | else | |
0bae362c | 10909 | field_size_in_bits = type_size_in_bits; |
feb5f1b1 | 10910 | |
feb5f1b1 | 10911 | decl_align_in_bits = simple_decl_align_in_bits (decl); |
10912 | ||
10913 | /* The GCC front-end doesn't make any attempt to keep track of the | |
10914 | starting bit offset (relative to the start of the containing | |
10915 | structure type) of the hypothetical "containing object" for a | |
10916 | bit-field. Thus, when computing the byte offset value for the | |
10917 | start of the "containing object" of a bit-field, we must deduce | |
10918 | this information on our own. This can be rather tricky to do in | |
10919 | some cases. For example, handling the following structure type | |
10920 | definition when compiling for an i386/i486 target (which only | |
10921 | aligns long long's to 32-bit boundaries) can be very tricky: | |
30ade641 | 10922 | |
10923 | struct S { int field1; long long field2:31; }; | |
10924 | ||
feb5f1b1 | 10925 | Fortunately, there is a simple rule-of-thumb which can be used |
10926 | in such cases. When compiling for an i386/i486, GCC will | |
10927 | allocate 8 bytes for the structure shown above. It decides to | |
10928 | do this based upon one simple rule for bit-field allocation. | |
10929 | GCC allocates each "containing object" for each bit-field at | |
10930 | the first (i.e. lowest addressed) legitimate alignment boundary | |
10931 | (based upon the required minimum alignment for the declared | |
10932 | type of the field) which it can possibly use, subject to the | |
10933 | condition that there is still enough available space remaining | |
10934 | in the containing object (when allocated at the selected point) | |
10935 | to fully accommodate all of the bits of the bit-field itself. | |
10936 | ||
10937 | This simple rule makes it obvious why GCC allocates 8 bytes for | |
10938 | each object of the structure type shown above. When looking | |
10939 | for a place to allocate the "containing object" for `field2', | |
10940 | the compiler simply tries to allocate a 64-bit "containing | |
10941 | object" at each successive 32-bit boundary (starting at zero) | |
10942 | until it finds a place to allocate that 64- bit field such that | |
10943 | at least 31 contiguous (and previously unallocated) bits remain | |
10944 | within that selected 64 bit field. (As it turns out, for the | |
10945 | example above, the compiler finds it is OK to allocate the | |
10946 | "containing object" 64-bit field at bit-offset zero within the | |
10947 | structure type.) | |
10948 | ||
10949 | Here we attempt to work backwards from the limited set of facts | |
10950 | we're given, and we try to deduce from those facts, where GCC | |
10951 | must have believed that the containing object started (within | |
10952 | the structure type). The value we deduce is then used (by the | |
10953 | callers of this routine) to generate DW_AT_location and | |
10954 | DW_AT_bit_offset attributes for fields (both bit-fields and, in | |
10955 | the case of DW_AT_location, regular fields as well). */ | |
10956 | ||
10957 | /* Figure out the bit-distance from the start of the structure to | |
10958 | the "deepest" bit of the bit-field. */ | |
10959 | deepest_bitpos = bitpos_int + field_size_in_bits; | |
10960 | ||
10961 | /* This is the tricky part. Use some fancy footwork to deduce | |
10962 | where the lowest addressed bit of the containing object must | |
10963 | be. */ | |
2180a0af | 10964 | object_offset_in_bits = deepest_bitpos - type_size_in_bits; |
10965 | ||
feb5f1b1 | 10966 | /* Round up to type_align by default. This works best for |
10967 | bitfields. */ | |
71b5358c | 10968 | object_offset_in_bits |
feb5f1b1 | 10969 | = round_up_to_align (object_offset_in_bits, type_align_in_bits); |
10970 | ||
10971 | if (object_offset_in_bits > bitpos_int) | |
10972 | { | |
10973 | object_offset_in_bits = deepest_bitpos - type_size_in_bits; | |
10974 | ||
10975 | /* Round up to decl_align instead. */ | |
10976 | object_offset_in_bits | |
10977 | = round_up_to_align (object_offset_in_bits, decl_align_in_bits); | |
10978 | } | |
2180a0af | 10979 | } |
feb5f1b1 | 10980 | else |
10981 | #endif | |
10982 | object_offset_in_bits = bitpos_int; | |
30ade641 | 10983 | |
8c3f468d | 10984 | return object_offset_in_bits / BITS_PER_UNIT; |
30ade641 | 10985 | } |
30ade641 | 10986 | \f |
ec1e49cc | 10987 | /* The following routines define various Dwarf attributes and any data |
10988 | associated with them. */ | |
30ade641 | 10989 | |
678d90bb | 10990 | /* Add a location description attribute value to a DIE. |
30ade641 | 10991 | |
678d90bb | 10992 | This emits location attributes suitable for whole variables and |
30ade641 | 10993 | whole parameters. Note that the location attributes for struct fields are |
10994 | generated by the routine `data_member_location_attribute' below. */ | |
ec1e49cc | 10995 | |
931e9893 | 10996 | static inline void |
8ec3a57b | 10997 | add_AT_location_description (dw_die_ref die, enum dwarf_attribute attr_kind, |
10998 | dw_loc_descr_ref descr) | |
30ade641 | 10999 | { |
86e12d28 | 11000 | if (descr != 0) |
11001 | add_AT_loc (die, attr_kind, descr); | |
30ade641 | 11002 | } |
11003 | ||
8c3f468d | 11004 | /* Attach the specialized form of location attribute used for data members of |
11005 | struct and union types. In the special case of a FIELD_DECL node which | |
11006 | represents a bit-field, the "offset" part of this special location | |
11007 | descriptor must indicate the distance in bytes from the lowest-addressed | |
11008 | byte of the containing struct or union type to the lowest-addressed byte of | |
11009 | the "containing object" for the bit-field. (See the `field_byte_offset' | |
11010 | function above). | |
11011 | ||
11012 | For any given bit-field, the "containing object" is a hypothetical object | |
11013 | (of some integral or enum type) within which the given bit-field lives. The | |
11014 | type of this hypothetical "containing object" is always the same as the | |
11015 | declared type of the individual bit-field itself (for GCC anyway... the | |
11016 | DWARF spec doesn't actually mandate this). Note that it is the size (in | |
11017 | bytes) of the hypothetical "containing object" which will be given in the | |
11018 | DW_AT_byte_size attribute for this bit-field. (See the | |
11019 | `byte_size_attribute' function below.) It is also used when calculating the | |
11020 | value of the DW_AT_bit_offset attribute. (See the `bit_offset_attribute' | |
11021 | function below.) */ | |
ec1e49cc | 11022 | |
30ade641 | 11023 | static void |
8ec3a57b | 11024 | add_data_member_location_attribute (dw_die_ref die, tree decl) |
30ade641 | 11025 | { |
3d867824 | 11026 | HOST_WIDE_INT offset; |
3e14aa38 | 11027 | dw_loc_descr_ref loc_descr = 0; |
30ade641 | 11028 | |
3cb98335 | 11029 | if (TREE_CODE (decl) == TREE_BINFO) |
3e14aa38 | 11030 | { |
11031 | /* We're working on the TAG_inheritance for a base class. */ | |
57c28194 | 11032 | if (BINFO_VIRTUAL_P (decl) && is_cxx ()) |
3e14aa38 | 11033 | { |
11034 | /* For C++ virtual bases we can't just use BINFO_OFFSET, as they | |
11035 | aren't at a fixed offset from all (sub)objects of the same | |
11036 | type. We need to extract the appropriate offset from our | |
11037 | vtable. The following dwarf expression means | |
11038 | ||
11039 | BaseAddr = ObAddr + *((*ObAddr) - Offset) | |
11040 | ||
11041 | This is specific to the V3 ABI, of course. */ | |
11042 | ||
11043 | dw_loc_descr_ref tmp; | |
8c3f468d | 11044 | |
3e14aa38 | 11045 | /* Make a copy of the object address. */ |
11046 | tmp = new_loc_descr (DW_OP_dup, 0, 0); | |
11047 | add_loc_descr (&loc_descr, tmp); | |
8c3f468d | 11048 | |
3e14aa38 | 11049 | /* Extract the vtable address. */ |
11050 | tmp = new_loc_descr (DW_OP_deref, 0, 0); | |
11051 | add_loc_descr (&loc_descr, tmp); | |
8c3f468d | 11052 | |
3e14aa38 | 11053 | /* Calculate the address of the offset. */ |
11054 | offset = tree_low_cst (BINFO_VPTR_FIELD (decl), 0); | |
7bd4f6b6 | 11055 | gcc_assert (offset < 0); |
8c3f468d | 11056 | |
3e14aa38 | 11057 | tmp = int_loc_descriptor (-offset); |
11058 | add_loc_descr (&loc_descr, tmp); | |
11059 | tmp = new_loc_descr (DW_OP_minus, 0, 0); | |
11060 | add_loc_descr (&loc_descr, tmp); | |
8c3f468d | 11061 | |
3e14aa38 | 11062 | /* Extract the offset. */ |
11063 | tmp = new_loc_descr (DW_OP_deref, 0, 0); | |
11064 | add_loc_descr (&loc_descr, tmp); | |
8c3f468d | 11065 | |
3e14aa38 | 11066 | /* Add it to the object address. */ |
11067 | tmp = new_loc_descr (DW_OP_plus, 0, 0); | |
11068 | add_loc_descr (&loc_descr, tmp); | |
11069 | } | |
11070 | else | |
11071 | offset = tree_low_cst (BINFO_OFFSET (decl), 0); | |
11072 | } | |
404ba76d | 11073 | else |
11074 | offset = field_byte_offset (decl); | |
11075 | ||
3e14aa38 | 11076 | if (! loc_descr) |
11077 | { | |
11078 | enum dwarf_location_atom op; | |
11079 | ||
8c3f468d | 11080 | /* The DWARF2 standard says that we should assume that the structure |
11081 | address is already on the stack, so we can specify a structure field | |
11082 | address by using DW_OP_plus_uconst. */ | |
ec1e49cc | 11083 | |
30ade641 | 11084 | #ifdef MIPS_DEBUGGING_INFO |
8c3f468d | 11085 | /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst |
11086 | operator correctly. It works only if we leave the offset on the | |
11087 | stack. */ | |
3e14aa38 | 11088 | op = DW_OP_constu; |
30ade641 | 11089 | #else |
3e14aa38 | 11090 | op = DW_OP_plus_uconst; |
30ade641 | 11091 | #endif |
ec1e49cc | 11092 | |
3e14aa38 | 11093 | loc_descr = new_loc_descr (op, offset, 0); |
11094 | } | |
8c3f468d | 11095 | |
30ade641 | 11096 | add_AT_loc (die, DW_AT_data_member_location, loc_descr); |
11097 | } | |
11098 | ||
1b6ad376 | 11099 | /* Writes integer values to dw_vec_const array. */ |
11100 | ||
11101 | static void | |
11102 | insert_int (HOST_WIDE_INT val, unsigned int size, unsigned char *dest) | |
11103 | { | |
11104 | while (size != 0) | |
11105 | { | |
11106 | *dest++ = val & 0xff; | |
11107 | val >>= 8; | |
11108 | --size; | |
11109 | } | |
11110 | } | |
11111 | ||
11112 | /* Reads integers from dw_vec_const array. Inverse of insert_int. */ | |
11113 | ||
11114 | static HOST_WIDE_INT | |
11115 | extract_int (const unsigned char *src, unsigned int size) | |
11116 | { | |
11117 | HOST_WIDE_INT val = 0; | |
11118 | ||
11119 | src += size; | |
11120 | while (size != 0) | |
11121 | { | |
11122 | val <<= 8; | |
11123 | val |= *--src & 0xff; | |
11124 | --size; | |
11125 | } | |
11126 | return val; | |
11127 | } | |
11128 | ||
11129 | /* Writes floating point values to dw_vec_const array. */ | |
11130 | ||
11131 | static void | |
5493cb9a | 11132 | insert_float (const_rtx rtl, unsigned char *array) |
1b6ad376 | 11133 | { |
11134 | REAL_VALUE_TYPE rv; | |
11135 | long val[4]; | |
11136 | int i; | |
11137 | ||
11138 | REAL_VALUE_FROM_CONST_DOUBLE (rv, rtl); | |
11139 | real_to_target (val, &rv, GET_MODE (rtl)); | |
11140 | ||
11141 | /* real_to_target puts 32-bit pieces in each long. Pack them. */ | |
11142 | for (i = 0; i < GET_MODE_SIZE (GET_MODE (rtl)) / 4; i++) | |
11143 | { | |
11144 | insert_int (val[i], 4, array); | |
11145 | array += 4; | |
11146 | } | |
11147 | } | |
11148 | ||
df07c3ae | 11149 | /* Attach a DW_AT_const_value attribute for a variable or a parameter which |
30ade641 | 11150 | does not have a "location" either in memory or in a register. These |
11151 | things can arise in GNU C when a constant is passed as an actual parameter | |
11152 | to an inlined function. They can also arise in C++ where declared | |
11153 | constants do not necessarily get memory "homes". */ | |
ec1e49cc | 11154 | |
30ade641 | 11155 | static void |
8ec3a57b | 11156 | add_const_value_attribute (dw_die_ref die, rtx rtl) |
30ade641 | 11157 | { |
11158 | switch (GET_CODE (rtl)) | |
11159 | { | |
11160 | case CONST_INT: | |
ca98eb0a | 11161 | { |
11162 | HOST_WIDE_INT val = INTVAL (rtl); | |
bc70bd5e | 11163 | |
3d867824 | 11164 | if (val < 0) |
11165 | add_AT_int (die, DW_AT_const_value, val); | |
8ff30ff6 | 11166 | else |
3d867824 | 11167 | add_AT_unsigned (die, DW_AT_const_value, (unsigned HOST_WIDE_INT) val); |
ca98eb0a | 11168 | } |
30ade641 | 11169 | break; |
11170 | ||
11171 | case CONST_DOUBLE: | |
11172 | /* Note that a CONST_DOUBLE rtx could represent either an integer or a | |
c83a163c | 11173 | floating-point constant. A CONST_DOUBLE is used whenever the |
11174 | constant requires more than one word in order to be adequately | |
11175 | represented. We output CONST_DOUBLEs as blocks. */ | |
df78b73b | 11176 | { |
19cb6b50 | 11177 | enum machine_mode mode = GET_MODE (rtl); |
df78b73b | 11178 | |
cee7491d | 11179 | if (SCALAR_FLOAT_MODE_P (mode)) |
df78b73b | 11180 | { |
1b6ad376 | 11181 | unsigned int length = GET_MODE_SIZE (mode); |
2457c754 | 11182 | unsigned char *array = GGC_NEWVEC (unsigned char, length); |
df78b73b | 11183 | |
1b6ad376 | 11184 | insert_float (rtl, array); |
11185 | add_AT_vec (die, DW_AT_const_value, length / 4, 4, array); | |
df78b73b | 11186 | } |
11187 | else | |
ca98eb0a | 11188 | { |
11189 | /* ??? We really should be using HOST_WIDE_INT throughout. */ | |
7bd4f6b6 | 11190 | gcc_assert (HOST_BITS_PER_LONG == HOST_BITS_PER_WIDE_INT); |
8c3f468d | 11191 | |
ca98eb0a | 11192 | add_AT_long_long (die, DW_AT_const_value, |
11193 | CONST_DOUBLE_HIGH (rtl), CONST_DOUBLE_LOW (rtl)); | |
11194 | } | |
df78b73b | 11195 | } |
30ade641 | 11196 | break; |
11197 | ||
1b6ad376 | 11198 | case CONST_VECTOR: |
11199 | { | |
11200 | enum machine_mode mode = GET_MODE (rtl); | |
11201 | unsigned int elt_size = GET_MODE_UNIT_SIZE (mode); | |
11202 | unsigned int length = CONST_VECTOR_NUNITS (rtl); | |
2457c754 | 11203 | unsigned char *array = GGC_NEWVEC (unsigned char, length * elt_size); |
1b6ad376 | 11204 | unsigned int i; |
11205 | unsigned char *p; | |
11206 | ||
7bd4f6b6 | 11207 | switch (GET_MODE_CLASS (mode)) |
1b6ad376 | 11208 | { |
7bd4f6b6 | 11209 | case MODE_VECTOR_INT: |
1b6ad376 | 11210 | for (i = 0, p = array; i < length; i++, p += elt_size) |
11211 | { | |
11212 | rtx elt = CONST_VECTOR_ELT (rtl, i); | |
11213 | HOST_WIDE_INT lo, hi; | |
8ff30ff6 | 11214 | |
7bd4f6b6 | 11215 | switch (GET_CODE (elt)) |
1b6ad376 | 11216 | { |
7bd4f6b6 | 11217 | case CONST_INT: |
1b6ad376 | 11218 | lo = INTVAL (elt); |
11219 | hi = -(lo < 0); | |
7bd4f6b6 | 11220 | break; |
8ff30ff6 | 11221 | |
7bd4f6b6 | 11222 | case CONST_DOUBLE: |
1b6ad376 | 11223 | lo = CONST_DOUBLE_LOW (elt); |
11224 | hi = CONST_DOUBLE_HIGH (elt); | |
7bd4f6b6 | 11225 | break; |
8ff30ff6 | 11226 | |
7bd4f6b6 | 11227 | default: |
11228 | gcc_unreachable (); | |
1b6ad376 | 11229 | } |
8ff30ff6 | 11230 | |
1b6ad376 | 11231 | if (elt_size <= sizeof (HOST_WIDE_INT)) |
11232 | insert_int (lo, elt_size, p); | |
7bd4f6b6 | 11233 | else |
1b6ad376 | 11234 | { |
11235 | unsigned char *p0 = p; | |
11236 | unsigned char *p1 = p + sizeof (HOST_WIDE_INT); | |
8ff30ff6 | 11237 | |
7bd4f6b6 | 11238 | gcc_assert (elt_size == 2 * sizeof (HOST_WIDE_INT)); |
1b6ad376 | 11239 | if (WORDS_BIG_ENDIAN) |
11240 | { | |
11241 | p0 = p1; | |
11242 | p1 = p; | |
11243 | } | |
11244 | insert_int (lo, sizeof (HOST_WIDE_INT), p0); | |
11245 | insert_int (hi, sizeof (HOST_WIDE_INT), p1); | |
11246 | } | |
1b6ad376 | 11247 | } |
7bd4f6b6 | 11248 | break; |
11249 | ||
11250 | case MODE_VECTOR_FLOAT: | |
1b6ad376 | 11251 | for (i = 0, p = array; i < length; i++, p += elt_size) |
11252 | { | |
11253 | rtx elt = CONST_VECTOR_ELT (rtl, i); | |
11254 | insert_float (elt, p); | |
11255 | } | |
7bd4f6b6 | 11256 | break; |
11257 | ||
11258 | default: | |
11259 | gcc_unreachable (); | |
1b6ad376 | 11260 | } |
1b6ad376 | 11261 | |
11262 | add_AT_vec (die, DW_AT_const_value, length, elt_size, array); | |
11263 | } | |
11264 | break; | |
11265 | ||
30ade641 | 11266 | case CONST_STRING: |
11267 | add_AT_string (die, DW_AT_const_value, XSTR (rtl, 0)); | |
11268 | break; | |
11269 | ||
11270 | case SYMBOL_REF: | |
11271 | case LABEL_REF: | |
11272 | case CONST: | |
7facaa35 | 11273 | add_AT_addr (die, DW_AT_const_value, rtl); |
62aedc4c | 11274 | VEC_safe_push (rtx, gc, used_rtx_array, rtl); |
30ade641 | 11275 | break; |
11276 | ||
11277 | case PLUS: | |
11278 | /* In cases where an inlined instance of an inline function is passed | |
c83a163c | 11279 | the address of an `auto' variable (which is local to the caller) we |
11280 | can get a situation where the DECL_RTL of the artificial local | |
11281 | variable (for the inlining) which acts as a stand-in for the | |
11282 | corresponding formal parameter (of the inline function) will look | |
11283 | like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not | |
11284 | exactly a compile-time constant expression, but it isn't the address | |
11285 | of the (artificial) local variable either. Rather, it represents the | |
11286 | *value* which the artificial local variable always has during its | |
11287 | lifetime. We currently have no way to represent such quasi-constant | |
11288 | values in Dwarf, so for now we just punt and generate nothing. */ | |
30ade641 | 11289 | break; |
11290 | ||
11291 | default: | |
11292 | /* No other kinds of rtx should be possible here. */ | |
7bd4f6b6 | 11293 | gcc_unreachable (); |
30ade641 | 11294 | } |
11295 | ||
11296 | } | |
11297 | ||
e124d6c7 | 11298 | /* Determine whether the evaluation of EXPR references any variables |
11299 | or functions which aren't otherwise used (and therefore may not be | |
11300 | output). */ | |
11301 | static tree | |
11302 | reference_to_unused (tree * tp, int * walk_subtrees, | |
11303 | void * data ATTRIBUTE_UNUSED) | |
11304 | { | |
75a70cf9 | 11305 | if (! EXPR_P (*tp) && ! CONSTANT_CLASS_P (*tp)) |
e124d6c7 | 11306 | *walk_subtrees = 0; |
61a9389f | 11307 | |
e124d6c7 | 11308 | if (DECL_P (*tp) && ! TREE_PUBLIC (*tp) && ! TREE_USED (*tp) |
11309 | && ! TREE_ASM_WRITTEN (*tp)) | |
11310 | return *tp; | |
a43689ad | 11311 | /* ??? The C++ FE emits debug information for using decls, so |
11312 | putting gcc_unreachable here falls over. See PR31899. For now | |
11313 | be conservative. */ | |
5615be0f | 11314 | else if (!cgraph_global_info_ready |
11315 | && (TREE_CODE (*tp) == VAR_DECL || TREE_CODE (*tp) == FUNCTION_DECL)) | |
a43689ad | 11316 | return *tp; |
5615be0f | 11317 | else if (DECL_P (*tp) && TREE_CODE (*tp) == VAR_DECL) |
56e902bd | 11318 | { |
11319 | struct varpool_node *node = varpool_node (*tp); | |
11320 | if (!node->needed) | |
11321 | return *tp; | |
11322 | } | |
5615be0f | 11323 | else if (DECL_P (*tp) && TREE_CODE (*tp) == FUNCTION_DECL |
11324 | && (!DECL_EXTERNAL (*tp) || DECL_DECLARED_INLINE_P (*tp))) | |
11325 | { | |
11326 | struct cgraph_node *node = cgraph_node (*tp); | |
09fc9532 | 11327 | if (node->process || TREE_ASM_WRITTEN (*tp)) |
61a9389f | 11328 | return *tp; |
5615be0f | 11329 | } |
9238c28d | 11330 | else if (TREE_CODE (*tp) == STRING_CST && !TREE_ASM_WRITTEN (*tp)) |
11331 | return *tp; | |
56e902bd | 11332 | |
11333 | return NULL_TREE; | |
e124d6c7 | 11334 | } |
11335 | ||
9293d8bd | 11336 | /* Generate an RTL constant from a decl initializer INIT with decl type TYPE, |
11337 | for use in a later add_const_value_attribute call. */ | |
11338 | ||
11339 | static rtx | |
11340 | rtl_for_decl_init (tree init, tree type) | |
11341 | { | |
11342 | rtx rtl = NULL_RTX; | |
11343 | ||
11344 | /* If a variable is initialized with a string constant without embedded | |
11345 | zeros, build CONST_STRING. */ | |
11346 | if (TREE_CODE (init) == STRING_CST && TREE_CODE (type) == ARRAY_TYPE) | |
11347 | { | |
11348 | tree enttype = TREE_TYPE (type); | |
11349 | tree domain = TYPE_DOMAIN (type); | |
11350 | enum machine_mode mode = TYPE_MODE (enttype); | |
11351 | ||
11352 | if (GET_MODE_CLASS (mode) == MODE_INT && GET_MODE_SIZE (mode) == 1 | |
11353 | && domain | |
11354 | && integer_zerop (TYPE_MIN_VALUE (domain)) | |
11355 | && compare_tree_int (TYPE_MAX_VALUE (domain), | |
11356 | TREE_STRING_LENGTH (init) - 1) == 0 | |
11357 | && ((size_t) TREE_STRING_LENGTH (init) | |
11358 | == strlen (TREE_STRING_POINTER (init)) + 1)) | |
11359 | rtl = gen_rtx_CONST_STRING (VOIDmode, | |
11360 | ggc_strdup (TREE_STRING_POINTER (init))); | |
11361 | } | |
bf591863 | 11362 | /* Other aggregates, and complex values, could be represented using |
11363 | CONCAT: FIXME! */ | |
11364 | else if (AGGREGATE_TYPE_P (type) || TREE_CODE (type) == COMPLEX_TYPE) | |
11365 | ; | |
61a9389f | 11366 | /* Vectors only work if their mode is supported by the target. |
bf591863 | 11367 | FIXME: generic vectors ought to work too. */ |
11368 | else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_MODE (type) == BLKmode) | |
e124d6c7 | 11369 | ; |
9293d8bd | 11370 | /* If the initializer is something that we know will expand into an |
e124d6c7 | 11371 | immediate RTL constant, expand it now. We must be careful not to |
11372 | reference variables which won't be output. */ | |
11373 | else if (initializer_constant_valid_p (init, type) | |
11374 | && ! walk_tree (&init, reference_to_unused, NULL, NULL)) | |
9293d8bd | 11375 | { |
c3910319 | 11376 | /* Convert vector CONSTRUCTOR initializers to VECTOR_CST if |
11377 | possible. */ | |
11378 | if (TREE_CODE (type) == VECTOR_TYPE) | |
11379 | switch (TREE_CODE (init)) | |
11380 | { | |
11381 | case VECTOR_CST: | |
11382 | break; | |
11383 | case CONSTRUCTOR: | |
11384 | if (TREE_CONSTANT (init)) | |
11385 | { | |
11386 | VEC(constructor_elt,gc) *elts = CONSTRUCTOR_ELTS (init); | |
11387 | bool constant_p = true; | |
11388 | tree value; | |
11389 | unsigned HOST_WIDE_INT ix; | |
11390 | ||
11391 | /* Even when ctor is constant, it might contain non-*_CST | |
11392 | elements (e.g. { 1.0/0.0 - 1.0/0.0, 0.0 }) and those don't | |
11393 | belong into VECTOR_CST nodes. */ | |
11394 | FOR_EACH_CONSTRUCTOR_VALUE (elts, ix, value) | |
11395 | if (!CONSTANT_CLASS_P (value)) | |
11396 | { | |
11397 | constant_p = false; | |
11398 | break; | |
11399 | } | |
11400 | ||
11401 | if (constant_p) | |
11402 | { | |
11403 | init = build_vector_from_ctor (type, elts); | |
11404 | break; | |
11405 | } | |
11406 | } | |
11407 | /* FALLTHRU */ | |
11408 | ||
11409 | default: | |
11410 | return NULL; | |
11411 | } | |
11412 | ||
9293d8bd | 11413 | rtl = expand_expr (init, NULL_RTX, VOIDmode, EXPAND_INITIALIZER); |
11414 | ||
11415 | /* If expand_expr returns a MEM, it wasn't immediate. */ | |
11416 | gcc_assert (!rtl || !MEM_P (rtl)); | |
11417 | } | |
11418 | ||
11419 | return rtl; | |
11420 | } | |
11421 | ||
11422 | /* Generate RTL for the variable DECL to represent its location. */ | |
11423 | ||
9ed904da | 11424 | static rtx |
8ec3a57b | 11425 | rtl_for_decl_location (tree decl) |
30ade641 | 11426 | { |
19cb6b50 | 11427 | rtx rtl; |
ec1e49cc | 11428 | |
30ade641 | 11429 | /* Here we have to decide where we are going to say the parameter "lives" |
11430 | (as far as the debugger is concerned). We only have a couple of | |
11431 | choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL. | |
ec1e49cc | 11432 | |
f80d1bcd | 11433 | DECL_RTL normally indicates where the parameter lives during most of the |
ec1e49cc | 11434 | activation of the function. If optimization is enabled however, this |
f80d1bcd | 11435 | could be either NULL or else a pseudo-reg. Both of those cases indicate |
30ade641 | 11436 | that the parameter doesn't really live anywhere (as far as the code |
11437 | generation parts of GCC are concerned) during most of the function's | |
11438 | activation. That will happen (for example) if the parameter is never | |
ec1e49cc | 11439 | referenced within the function. |
11440 | ||
11441 | We could just generate a location descriptor here for all non-NULL | |
11442 | non-pseudo values of DECL_RTL and ignore all of the rest, but we can be | |
11443 | a little nicer than that if we also consider DECL_INCOMING_RTL in cases | |
11444 | where DECL_RTL is NULL or is a pseudo-reg. | |
11445 | ||
11446 | Note however that we can only get away with using DECL_INCOMING_RTL as | |
11447 | a backup substitute for DECL_RTL in certain limited cases. In cases | |
11448 | where DECL_ARG_TYPE (decl) indicates the same type as TREE_TYPE (decl), | |
11449 | we can be sure that the parameter was passed using the same type as it is | |
11450 | declared to have within the function, and that its DECL_INCOMING_RTL | |
11451 | points us to a place where a value of that type is passed. | |
11452 | ||
11453 | In cases where DECL_ARG_TYPE (decl) and TREE_TYPE (decl) are different, | |
11454 | we cannot (in general) use DECL_INCOMING_RTL as a substitute for DECL_RTL | |
11455 | because in these cases DECL_INCOMING_RTL points us to a value of some | |
11456 | type which is *different* from the type of the parameter itself. Thus, | |
11457 | if we tried to use DECL_INCOMING_RTL to generate a location attribute in | |
11458 | such cases, the debugger would end up (for example) trying to fetch a | |
11459 | `float' from a place which actually contains the first part of a | |
11460 | `double'. That would lead to really incorrect and confusing | |
11461 | output at debug-time. | |
11462 | ||
11463 | So, in general, we *do not* use DECL_INCOMING_RTL as a backup for DECL_RTL | |
11464 | in cases where DECL_ARG_TYPE (decl) != TREE_TYPE (decl). There | |
11465 | are a couple of exceptions however. On little-endian machines we can | |
11466 | get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE (decl) is | |
11467 | not the same as TREE_TYPE (decl), but only when DECL_ARG_TYPE (decl) is | |
11468 | an integral type that is smaller than TREE_TYPE (decl). These cases arise | |
11469 | when (on a little-endian machine) a non-prototyped function has a | |
11470 | parameter declared to be of type `short' or `char'. In such cases, | |
11471 | TREE_TYPE (decl) will be `short' or `char', DECL_ARG_TYPE (decl) will | |
11472 | be `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the | |
11473 | passed `int' value. If the debugger then uses that address to fetch | |
11474 | a `short' or a `char' (on a little-endian machine) the result will be | |
11475 | the correct data, so we allow for such exceptional cases below. | |
11476 | ||
11477 | Note that our goal here is to describe the place where the given formal | |
8c3f468d | 11478 | parameter lives during most of the function's activation (i.e. between the |
11479 | end of the prologue and the start of the epilogue). We'll do that as best | |
11480 | as we can. Note however that if the given formal parameter is modified | |
11481 | sometime during the execution of the function, then a stack backtrace (at | |
11482 | debug-time) will show the function as having been called with the *new* | |
11483 | value rather than the value which was originally passed in. This happens | |
11484 | rarely enough that it is not a major problem, but it *is* a problem, and | |
11485 | I'd like to fix it. | |
11486 | ||
11487 | A future version of dwarf2out.c may generate two additional attributes for | |
11488 | any given DW_TAG_formal_parameter DIE which will describe the "passed | |
11489 | type" and the "passed location" for the given formal parameter in addition | |
11490 | to the attributes we now generate to indicate the "declared type" and the | |
11491 | "active location" for each parameter. This additional set of attributes | |
11492 | could be used by debuggers for stack backtraces. Separately, note that | |
11493 | sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL can be NULL also. | |
11494 | This happens (for example) for inlined-instances of inline function formal | |
11495 | parameters which are never referenced. This really shouldn't be | |
11496 | happening. All PARM_DECL nodes should get valid non-NULL | |
4ee9c684 | 11497 | DECL_INCOMING_RTL values. FIXME. */ |
30ade641 | 11498 | |
11499 | /* Use DECL_RTL as the "location" unless we find something better. */ | |
ff12286a | 11500 | rtl = DECL_RTL_IF_SET (decl); |
30ade641 | 11501 | |
f3546830 | 11502 | /* When generating abstract instances, ignore everything except |
3332aee2 | 11503 | constants, symbols living in memory, and symbols living in |
11504 | fixed registers. */ | |
f3546830 | 11505 | if (! reload_completed) |
11506 | { | |
11507 | if (rtl | |
11508 | && (CONSTANT_P (rtl) | |
e16ceb8e | 11509 | || (MEM_P (rtl) |
3332aee2 | 11510 | && CONSTANT_P (XEXP (rtl, 0))) |
8ad4c111 | 11511 | || (REG_P (rtl) |
3332aee2 | 11512 | && TREE_CODE (decl) == VAR_DECL |
11513 | && TREE_STATIC (decl)))) | |
e93986bb | 11514 | { |
883b2e73 | 11515 | rtl = targetm.delegitimize_address (rtl); |
e93986bb | 11516 | return rtl; |
11517 | } | |
f3546830 | 11518 | rtl = NULL_RTX; |
11519 | } | |
11520 | else if (TREE_CODE (decl) == PARM_DECL) | |
30ade641 | 11521 | { |
11522 | if (rtl == NULL_RTX || is_pseudo_reg (rtl)) | |
11523 | { | |
0189d7ee | 11524 | tree declared_type = TREE_TYPE (decl); |
11525 | tree passed_type = DECL_ARG_TYPE (decl); | |
11526 | enum machine_mode dmode = TYPE_MODE (declared_type); | |
11527 | enum machine_mode pmode = TYPE_MODE (passed_type); | |
30ade641 | 11528 | |
ec1e49cc | 11529 | /* This decl represents a formal parameter which was optimized out. |
30ade641 | 11530 | Note that DECL_INCOMING_RTL may be NULL in here, but we handle |
8c3f468d | 11531 | all cases where (rtl == NULL_RTX) just below. */ |
0189d7ee | 11532 | if (dmode == pmode) |
f80d1bcd | 11533 | rtl = DECL_INCOMING_RTL (decl); |
0189d7ee | 11534 | else if (SCALAR_INT_MODE_P (dmode) |
a4cb69f8 | 11535 | && GET_MODE_SIZE (dmode) <= GET_MODE_SIZE (pmode) |
11536 | && DECL_INCOMING_RTL (decl)) | |
0189d7ee | 11537 | { |
11538 | rtx inc = DECL_INCOMING_RTL (decl); | |
11539 | if (REG_P (inc)) | |
11540 | rtl = inc; | |
11541 | else if (MEM_P (inc)) | |
11542 | { | |
11543 | if (BYTES_BIG_ENDIAN) | |
11544 | rtl = adjust_address_nv (inc, dmode, | |
11545 | GET_MODE_SIZE (pmode) | |
11546 | - GET_MODE_SIZE (dmode)); | |
11547 | else | |
11548 | rtl = inc; | |
11549 | } | |
11550 | } | |
30ade641 | 11551 | } |
80291b9e | 11552 | |
11553 | /* If the parm was passed in registers, but lives on the stack, then | |
11554 | make a big endian correction if the mode of the type of the | |
11555 | parameter is not the same as the mode of the rtl. */ | |
11556 | /* ??? This is the same series of checks that are made in dbxout.c before | |
11557 | we reach the big endian correction code there. It isn't clear if all | |
11558 | of these checks are necessary here, but keeping them all is the safe | |
11559 | thing to do. */ | |
e16ceb8e | 11560 | else if (MEM_P (rtl) |
80291b9e | 11561 | && XEXP (rtl, 0) != const0_rtx |
11562 | && ! CONSTANT_P (XEXP (rtl, 0)) | |
11563 | /* Not passed in memory. */ | |
e16ceb8e | 11564 | && !MEM_P (DECL_INCOMING_RTL (decl)) |
80291b9e | 11565 | /* Not passed by invisible reference. */ |
8ad4c111 | 11566 | && (!REG_P (XEXP (rtl, 0)) |
80291b9e | 11567 | || REGNO (XEXP (rtl, 0)) == HARD_FRAME_POINTER_REGNUM |
11568 | || REGNO (XEXP (rtl, 0)) == STACK_POINTER_REGNUM | |
11569 | #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM | |
11570 | || REGNO (XEXP (rtl, 0)) == ARG_POINTER_REGNUM | |
11571 | #endif | |
11572 | ) | |
11573 | /* Big endian correction check. */ | |
11574 | && BYTES_BIG_ENDIAN | |
11575 | && TYPE_MODE (TREE_TYPE (decl)) != GET_MODE (rtl) | |
11576 | && (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl))) | |
11577 | < UNITS_PER_WORD)) | |
11578 | { | |
11579 | int offset = (UNITS_PER_WORD | |
11580 | - GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl)))); | |
8c3f468d | 11581 | |
80291b9e | 11582 | rtl = gen_rtx_MEM (TYPE_MODE (TREE_TYPE (decl)), |
11583 | plus_constant (XEXP (rtl, 0), offset)); | |
11584 | } | |
30ade641 | 11585 | } |
13906b02 | 11586 | else if (TREE_CODE (decl) == VAR_DECL |
c7c9d0ca | 11587 | && rtl |
e16ceb8e | 11588 | && MEM_P (rtl) |
13906b02 | 11589 | && GET_MODE (rtl) != TYPE_MODE (TREE_TYPE (decl)) |
11590 | && BYTES_BIG_ENDIAN) | |
11591 | { | |
11592 | int rsize = GET_MODE_SIZE (GET_MODE (rtl)); | |
11593 | int dsize = GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl))); | |
11594 | ||
11595 | /* If a variable is declared "register" yet is smaller than | |
11596 | a register, then if we store the variable to memory, it | |
11597 | looks like we're storing a register-sized value, when in | |
11598 | fact we are not. We need to adjust the offset of the | |
11599 | storage location to reflect the actual value's bytes, | |
11600 | else gdb will not be able to display it. */ | |
11601 | if (rsize > dsize) | |
11602 | rtl = gen_rtx_MEM (TYPE_MODE (TREE_TYPE (decl)), | |
11603 | plus_constant (XEXP (rtl, 0), rsize-dsize)); | |
11604 | } | |
ec1e49cc | 11605 | |
8c3f468d | 11606 | /* A variable with no DECL_RTL but a DECL_INITIAL is a compile-time constant, |
11607 | and will have been substituted directly into all expressions that use it. | |
11608 | C does not have such a concept, but C++ and other languages do. */ | |
12d886b8 | 11609 | if (!rtl && TREE_CODE (decl) == VAR_DECL && DECL_INITIAL (decl)) |
9293d8bd | 11610 | rtl = rtl_for_decl_init (DECL_INITIAL (decl), TREE_TYPE (decl)); |
2fbd3b4c | 11611 | |
e93986bb | 11612 | if (rtl) |
883b2e73 | 11613 | rtl = targetm.delegitimize_address (rtl); |
931e9893 | 11614 | |
11615 | /* If we don't look past the constant pool, we risk emitting a | |
11616 | reference to a constant pool entry that isn't referenced from | |
11617 | code, and thus is not emitted. */ | |
11618 | if (rtl) | |
11619 | rtl = avoid_constant_pool_reference (rtl); | |
11620 | ||
9ed904da | 11621 | return rtl; |
11622 | } | |
11623 | ||
12d886b8 | 11624 | /* We need to figure out what section we should use as the base for the |
11625 | address ranges where a given location is valid. | |
11626 | 1. If this particular DECL has a section associated with it, use that. | |
11627 | 2. If this function has a section associated with it, use that. | |
11628 | 3. Otherwise, use the text section. | |
11629 | XXX: If you split a variable across multiple sections, we won't notice. */ | |
11630 | ||
11631 | static const char * | |
5493cb9a | 11632 | secname_for_decl (const_tree decl) |
12d886b8 | 11633 | { |
11634 | const char *secname; | |
11635 | ||
11636 | if (VAR_OR_FUNCTION_DECL_P (decl) && DECL_SECTION_NAME (decl)) | |
11637 | { | |
11638 | tree sectree = DECL_SECTION_NAME (decl); | |
11639 | secname = TREE_STRING_POINTER (sectree); | |
11640 | } | |
11641 | else if (current_function_decl && DECL_SECTION_NAME (current_function_decl)) | |
11642 | { | |
11643 | tree sectree = DECL_SECTION_NAME (current_function_decl); | |
11644 | secname = TREE_STRING_POINTER (sectree); | |
11645 | } | |
5fbee89d | 11646 | else if (cfun && in_cold_section_p) |
abe32cce | 11647 | secname = crtl->subsections.cold_section_label; |
12d886b8 | 11648 | else |
11649 | secname = text_section_label; | |
11650 | ||
11651 | return secname; | |
11652 | } | |
11653 | ||
b61ffa4f | 11654 | /* Check whether decl is a Fortran COMMON symbol. If not, NULL_TREE is |
11655 | returned. If so, the decl for the COMMON block is returned, and the | |
a12691f0 | 11656 | value is the offset into the common block for the symbol. */ |
11657 | ||
845c3089 | 11658 | static tree |
11659 | fortran_common (tree decl, HOST_WIDE_INT *value) | |
a12691f0 | 11660 | { |
845c3089 | 11661 | tree val_expr, cvar; |
11662 | enum machine_mode mode; | |
11663 | HOST_WIDE_INT bitsize, bitpos; | |
11664 | tree offset; | |
11665 | int volatilep = 0, unsignedp = 0; | |
11666 | ||
a12691f0 | 11667 | /* If the decl isn't a VAR_DECL, or if it isn't public or static, or if |
11668 | it does not have a value (the offset into the common area), or if it | |
11669 | is thread local (as opposed to global) then it isn't common, and shouldn't | |
11670 | be handled as such. */ | |
11671 | if (TREE_CODE (decl) != VAR_DECL | |
845c3089 | 11672 | || !TREE_PUBLIC (decl) |
11673 | || !TREE_STATIC (decl) | |
11674 | || !DECL_HAS_VALUE_EXPR_P (decl) | |
11675 | || !is_fortran ()) | |
11676 | return NULL_TREE; | |
a12691f0 | 11677 | |
845c3089 | 11678 | val_expr = DECL_VALUE_EXPR (decl); |
11679 | if (TREE_CODE (val_expr) != COMPONENT_REF) | |
11680 | return NULL_TREE; | |
a12691f0 | 11681 | |
845c3089 | 11682 | cvar = get_inner_reference (val_expr, &bitsize, &bitpos, &offset, |
11683 | &mode, &unsignedp, &volatilep, true); | |
a12691f0 | 11684 | |
845c3089 | 11685 | if (cvar == NULL_TREE |
11686 | || TREE_CODE (cvar) != VAR_DECL | |
11687 | || DECL_ARTIFICIAL (cvar) | |
11688 | || !TREE_PUBLIC (cvar)) | |
11689 | return NULL_TREE; | |
a12691f0 | 11690 | |
845c3089 | 11691 | *value = 0; |
11692 | if (offset != NULL) | |
11693 | { | |
11694 | if (!host_integerp (offset, 0)) | |
11695 | return NULL_TREE; | |
11696 | *value = tree_low_cst (offset, 0); | |
a12691f0 | 11697 | } |
845c3089 | 11698 | if (bitpos != 0) |
11699 | *value += bitpos / BITS_PER_UNIT; | |
a12691f0 | 11700 | |
845c3089 | 11701 | return cvar; |
a12691f0 | 11702 | } |
11703 | ||
cc476c39 | 11704 | /* Dereference a location expression LOC if DECL is passed by invisible |
11705 | reference. */ | |
11706 | ||
11707 | static dw_loc_descr_ref | |
11708 | loc_by_reference (dw_loc_descr_ref loc, tree decl) | |
11709 | { | |
11710 | HOST_WIDE_INT size; | |
11711 | enum dwarf_location_atom op; | |
11712 | ||
11713 | if (loc == NULL) | |
11714 | return NULL; | |
11715 | ||
1095d222 | 11716 | if ((TREE_CODE (decl) != PARM_DECL |
11717 | && TREE_CODE (decl) != RESULT_DECL | |
11718 | && (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl))) | |
cc476c39 | 11719 | || !DECL_BY_REFERENCE (decl)) |
11720 | return loc; | |
11721 | ||
11722 | size = int_size_in_bytes (TREE_TYPE (decl)); | |
11723 | if (size > DWARF2_ADDR_SIZE || size == -1) | |
11724 | return 0; | |
11725 | else if (size == DWARF2_ADDR_SIZE) | |
11726 | op = DW_OP_deref; | |
11727 | else | |
11728 | op = DW_OP_deref_size; | |
11729 | add_loc_descr (&loc, new_loc_descr (op, size, 0)); | |
11730 | return loc; | |
11731 | } | |
a12691f0 | 11732 | |
df07c3ae | 11733 | /* Generate *either* a DW_AT_location attribute or else a DW_AT_const_value |
9ed904da | 11734 | data attribute for a variable or a parameter. We generate the |
11735 | DW_AT_const_value attribute only in those cases where the given variable | |
11736 | or parameter does not have a true "location" either in memory or in a | |
11737 | register. This can happen (for example) when a constant is passed as an | |
11738 | actual argument in a call to an inline function. (It's possible that | |
11739 | these things can crop up in other ways also.) Note that one type of | |
11740 | constant value which can be passed into an inlined function is a constant | |
11741 | pointer. This can happen for example if an actual argument in an inlined | |
11742 | function call evaluates to a compile-time constant address. */ | |
11743 | ||
11744 | static void | |
b2025850 | 11745 | add_location_or_const_value_attribute (dw_die_ref die, tree decl, |
11746 | enum dwarf_attribute attr) | |
9ed904da | 11747 | { |
19cb6b50 | 11748 | rtx rtl; |
931e9893 | 11749 | dw_loc_descr_ref descr; |
b2025850 | 11750 | var_loc_list *loc_list; |
6ad1968a | 11751 | struct var_loc_node *node; |
9ed904da | 11752 | if (TREE_CODE (decl) == ERROR_MARK) |
11753 | return; | |
7bd4f6b6 | 11754 | |
11755 | gcc_assert (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == PARM_DECL | |
11756 | || TREE_CODE (decl) == RESULT_DECL); | |
61a9389f | 11757 | |
b2025850 | 11758 | /* See if we possibly have multiple locations for this variable. */ |
11759 | loc_list = lookup_decl_loc (decl); | |
11760 | ||
11761 | /* If it truly has multiple locations, the first and last node will | |
11762 | differ. */ | |
11763 | if (loc_list && loc_list->first != loc_list->last) | |
11764 | { | |
12d886b8 | 11765 | const char *endname, *secname; |
b2025850 | 11766 | dw_loc_list_ref list; |
11767 | rtx varloc; | |
d53bb226 | 11768 | enum var_init_status initialized; |
6ad1968a | 11769 | |
b2025850 | 11770 | /* Now that we know what section we are using for a base, |
61a9389f | 11771 | actually construct the list of locations. |
b2025850 | 11772 | The first location information is what is passed to the |
11773 | function that creates the location list, and the remaining | |
11774 | locations just get added on to that list. | |
11775 | Note that we only know the start address for a location | |
11776 | (IE location changes), so to build the range, we use | |
11777 | the range [current location start, next location start]. | |
11778 | This means we have to special case the last node, and generate | |
11779 | a range of [last location start, end of function label]. */ | |
11780 | ||
11781 | node = loc_list->first; | |
11782 | varloc = NOTE_VAR_LOCATION (node->var_loc_note); | |
12d886b8 | 11783 | secname = secname_for_decl (decl); |
11784 | ||
d53bb226 | 11785 | if (NOTE_VAR_LOCATION_LOC (node->var_loc_note)) |
11786 | initialized = NOTE_VAR_LOCATION_STATUS (node->var_loc_note); | |
11787 | else | |
11788 | initialized = VAR_INIT_STATUS_INITIALIZED; | |
11789 | ||
cc476c39 | 11790 | descr = loc_by_reference (loc_descriptor (varloc, initialized), decl); |
11791 | list = new_loc_list (descr, node->label, node->next->label, secname, 1); | |
b2025850 | 11792 | node = node->next; |
11793 | ||
11794 | for (; node->next; node = node->next) | |
11795 | if (NOTE_VAR_LOCATION_LOC (node->var_loc_note) != NULL_RTX) | |
11796 | { | |
11797 | /* The variable has a location between NODE->LABEL and | |
11798 | NODE->NEXT->LABEL. */ | |
d53bb226 | 11799 | enum var_init_status initialized = |
11800 | NOTE_VAR_LOCATION_STATUS (node->var_loc_note); | |
b2025850 | 11801 | varloc = NOTE_VAR_LOCATION (node->var_loc_note); |
cc476c39 | 11802 | descr = loc_by_reference (loc_descriptor (varloc, initialized), |
11803 | decl); | |
11804 | add_loc_descr_to_loc_list (&list, descr, | |
b2025850 | 11805 | node->label, node->next->label, secname); |
11806 | } | |
11807 | ||
11808 | /* If the variable has a location at the last label | |
11809 | it keeps its location until the end of function. */ | |
11810 | if (NOTE_VAR_LOCATION_LOC (node->var_loc_note) != NULL_RTX) | |
11811 | { | |
11812 | char label_id[MAX_ARTIFICIAL_LABEL_BYTES]; | |
d53bb226 | 11813 | enum var_init_status initialized = |
11814 | NOTE_VAR_LOCATION_STATUS (node->var_loc_note); | |
b2025850 | 11815 | |
11816 | varloc = NOTE_VAR_LOCATION (node->var_loc_note); | |
11817 | if (!current_function_decl) | |
11818 | endname = text_end_label; | |
11819 | else | |
11820 | { | |
11821 | ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL, | |
11822 | current_function_funcdef_no); | |
11823 | endname = ggc_strdup (label_id); | |
11824 | } | |
cc476c39 | 11825 | descr = loc_by_reference (loc_descriptor (varloc, initialized), |
11826 | decl); | |
11827 | add_loc_descr_to_loc_list (&list, descr, | |
b2025850 | 11828 | node->label, endname, secname); |
11829 | } | |
11830 | ||
11831 | /* Finally, add the location list to the DIE, and we are done. */ | |
11832 | add_AT_loc_list (die, attr, list); | |
11833 | return; | |
11834 | } | |
11835 | ||
6ad1968a | 11836 | /* Try to get some constant RTL for this decl, and use that as the value of |
11837 | the location. */ | |
61a9389f | 11838 | |
9ed904da | 11839 | rtl = rtl_for_decl_location (decl); |
afcf285e | 11840 | if (rtl && (CONSTANT_P (rtl) || GET_CODE (rtl) == CONST_STRING)) |
30ade641 | 11841 | { |
30ade641 | 11842 | add_const_value_attribute (die, rtl); |
afcf285e | 11843 | return; |
30ade641 | 11844 | } |
61a9389f | 11845 | |
600b9bbf | 11846 | /* If we have tried to generate the location otherwise, and it |
6ad1968a | 11847 | didn't work out (we wouldn't be here if we did), and we have a one entry |
11848 | location list, try generating a location from that. */ | |
11849 | if (loc_list && loc_list->first) | |
11850 | { | |
d53bb226 | 11851 | enum var_init_status status; |
6ad1968a | 11852 | node = loc_list->first; |
d53bb226 | 11853 | status = NOTE_VAR_LOCATION_STATUS (node->var_loc_note); |
11854 | descr = loc_descriptor (NOTE_VAR_LOCATION (node->var_loc_note), status); | |
6ad1968a | 11855 | if (descr) |
600b9bbf | 11856 | { |
cc476c39 | 11857 | descr = loc_by_reference (descr, decl); |
600b9bbf | 11858 | add_AT_location_description (die, attr, descr); |
11859 | return; | |
11860 | } | |
11861 | } | |
11862 | ||
11863 | /* We couldn't get any rtl, so try directly generating the location | |
11864 | description from the tree. */ | |
11865 | descr = loc_descriptor_from_tree (decl); | |
11866 | if (descr) | |
11867 | { | |
cc476c39 | 11868 | descr = loc_by_reference (descr, decl); |
600b9bbf | 11869 | add_AT_location_description (die, attr, descr); |
11870 | return; | |
6ad1968a | 11871 | } |
e124d6c7 | 11872 | /* None of that worked, so it must not really have a location; |
11873 | try adding a constant value attribute from the DECL_INITIAL. */ | |
11874 | tree_add_const_value_attribute (die, decl); | |
30ade641 | 11875 | } |
11876 | ||
89f29a1b | 11877 | /* Add VARIABLE and DIE into deferred locations list. */ |
11878 | ||
11879 | static void | |
11880 | defer_location (tree variable, dw_die_ref die) | |
11881 | { | |
11882 | deferred_locations entry; | |
11883 | entry.variable = variable; | |
11884 | entry.die = die; | |
11885 | VEC_safe_push (deferred_locations, gc, deferred_locations_list, &entry); | |
11886 | } | |
11887 | ||
2eb674c9 | 11888 | /* Helper function for tree_add_const_value_attribute. Natively encode |
11889 | initializer INIT into an array. Return true if successful. */ | |
11890 | ||
11891 | static bool | |
11892 | native_encode_initializer (tree init, unsigned char *array, int size) | |
11893 | { | |
11894 | tree type; | |
11895 | ||
11896 | if (init == NULL_TREE) | |
11897 | return false; | |
11898 | ||
11899 | STRIP_NOPS (init); | |
11900 | switch (TREE_CODE (init)) | |
11901 | { | |
11902 | case STRING_CST: | |
11903 | type = TREE_TYPE (init); | |
11904 | if (TREE_CODE (type) == ARRAY_TYPE) | |
11905 | { | |
11906 | tree enttype = TREE_TYPE (type); | |
11907 | enum machine_mode mode = TYPE_MODE (enttype); | |
11908 | ||
11909 | if (GET_MODE_CLASS (mode) != MODE_INT || GET_MODE_SIZE (mode) != 1) | |
11910 | return false; | |
11911 | if (int_size_in_bytes (type) != size) | |
11912 | return false; | |
11913 | if (size > TREE_STRING_LENGTH (init)) | |
11914 | { | |
11915 | memcpy (array, TREE_STRING_POINTER (init), | |
11916 | TREE_STRING_LENGTH (init)); | |
11917 | memset (array + TREE_STRING_LENGTH (init), | |
11918 | '\0', size - TREE_STRING_LENGTH (init)); | |
11919 | } | |
11920 | else | |
11921 | memcpy (array, TREE_STRING_POINTER (init), size); | |
11922 | return true; | |
11923 | } | |
11924 | return false; | |
11925 | case CONSTRUCTOR: | |
11926 | type = TREE_TYPE (init); | |
11927 | if (int_size_in_bytes (type) != size) | |
11928 | return false; | |
11929 | if (TREE_CODE (type) == ARRAY_TYPE) | |
11930 | { | |
11931 | HOST_WIDE_INT min_index; | |
11932 | unsigned HOST_WIDE_INT cnt; | |
11933 | int curpos = 0, fieldsize; | |
11934 | constructor_elt *ce; | |
11935 | ||
11936 | if (TYPE_DOMAIN (type) == NULL_TREE | |
11937 | || !host_integerp (TYPE_MIN_VALUE (TYPE_DOMAIN (type)), 0)) | |
11938 | return false; | |
11939 | ||
11940 | fieldsize = int_size_in_bytes (TREE_TYPE (type)); | |
11941 | if (fieldsize <= 0) | |
11942 | return false; | |
11943 | ||
11944 | min_index = tree_low_cst (TYPE_MIN_VALUE (TYPE_DOMAIN (type)), 0); | |
11945 | memset (array, '\0', size); | |
11946 | for (cnt = 0; | |
11947 | VEC_iterate (constructor_elt, CONSTRUCTOR_ELTS (init), cnt, ce); | |
11948 | cnt++) | |
11949 | { | |
11950 | tree val = ce->value; | |
11951 | tree index = ce->index; | |
11952 | int pos = curpos; | |
11953 | if (index && TREE_CODE (index) == RANGE_EXPR) | |
11954 | pos = (tree_low_cst (TREE_OPERAND (index, 0), 0) - min_index) | |
11955 | * fieldsize; | |
11956 | else if (index) | |
00c47da2 | 11957 | pos = (tree_low_cst (index, 0) - min_index) * fieldsize; |
2eb674c9 | 11958 | |
11959 | if (val) | |
11960 | { | |
11961 | STRIP_NOPS (val); | |
11962 | if (!native_encode_initializer (val, array + pos, fieldsize)) | |
11963 | return false; | |
11964 | } | |
11965 | curpos = pos + fieldsize; | |
11966 | if (index && TREE_CODE (index) == RANGE_EXPR) | |
11967 | { | |
11968 | int count = tree_low_cst (TREE_OPERAND (index, 1), 0) | |
11969 | - tree_low_cst (TREE_OPERAND (index, 0), 0); | |
11970 | while (count > 0) | |
11971 | { | |
11972 | if (val) | |
11973 | memcpy (array + curpos, array + pos, fieldsize); | |
11974 | curpos += fieldsize; | |
11975 | } | |
11976 | } | |
11977 | gcc_assert (curpos <= size); | |
11978 | } | |
11979 | return true; | |
11980 | } | |
11981 | else if (TREE_CODE (type) == RECORD_TYPE | |
11982 | || TREE_CODE (type) == UNION_TYPE) | |
11983 | { | |
11984 | tree field = NULL_TREE; | |
11985 | unsigned HOST_WIDE_INT cnt; | |
11986 | constructor_elt *ce; | |
11987 | ||
11988 | if (int_size_in_bytes (type) != size) | |
11989 | return false; | |
11990 | ||
11991 | if (TREE_CODE (type) == RECORD_TYPE) | |
11992 | field = TYPE_FIELDS (type); | |
11993 | ||
11994 | for (cnt = 0; | |
11995 | VEC_iterate (constructor_elt, CONSTRUCTOR_ELTS (init), cnt, ce); | |
11996 | cnt++, field = field ? TREE_CHAIN (field) : 0) | |
11997 | { | |
11998 | tree val = ce->value; | |
11999 | int pos, fieldsize; | |
12000 | ||
12001 | if (ce->index != 0) | |
12002 | field = ce->index; | |
12003 | ||
12004 | if (val) | |
12005 | STRIP_NOPS (val); | |
12006 | ||
12007 | if (field == NULL_TREE || DECL_BIT_FIELD (field)) | |
12008 | return false; | |
12009 | ||
12010 | if (TREE_CODE (TREE_TYPE (field)) == ARRAY_TYPE | |
12011 | && TYPE_DOMAIN (TREE_TYPE (field)) | |
12012 | && ! TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (field)))) | |
12013 | return false; | |
12014 | else if (DECL_SIZE_UNIT (field) == NULL_TREE | |
12015 | || !host_integerp (DECL_SIZE_UNIT (field), 0)) | |
12016 | return false; | |
12017 | fieldsize = tree_low_cst (DECL_SIZE_UNIT (field), 0); | |
12018 | pos = int_byte_position (field); | |
12019 | gcc_assert (pos + fieldsize <= size); | |
12020 | if (val | |
12021 | && !native_encode_initializer (val, array + pos, fieldsize)) | |
12022 | return false; | |
12023 | } | |
12024 | return true; | |
12025 | } | |
12026 | return false; | |
00c47da2 | 12027 | case VIEW_CONVERT_EXPR: |
12028 | case NON_LVALUE_EXPR: | |
12029 | return native_encode_initializer (TREE_OPERAND (init, 0), array, size); | |
2eb674c9 | 12030 | default: |
12031 | return native_encode_expr (init, array, size) == size; | |
12032 | } | |
12033 | } | |
12034 | ||
eabb26f3 | 12035 | /* If we don't have a copy of this variable in memory for some reason (such |
12036 | as a C++ member constant that doesn't have an out-of-line definition), | |
12037 | we should tell the debugger about the constant value. */ | |
12038 | ||
12039 | static void | |
8ec3a57b | 12040 | tree_add_const_value_attribute (dw_die_ref var_die, tree decl) |
eabb26f3 | 12041 | { |
45b07c10 | 12042 | tree init; |
eabb26f3 | 12043 | tree type = TREE_TYPE (decl); |
9293d8bd | 12044 | rtx rtl; |
eabb26f3 | 12045 | |
45b07c10 | 12046 | if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != CONST_DECL) |
12047 | return; | |
12048 | ||
12049 | init = DECL_INITIAL (decl); | |
9293d8bd | 12050 | if (TREE_READONLY (decl) && ! TREE_THIS_VOLATILE (decl) && init) |
eabb26f3 | 12051 | /* OK */; |
12052 | else | |
12053 | return; | |
12054 | ||
9293d8bd | 12055 | rtl = rtl_for_decl_init (init, type); |
12056 | if (rtl) | |
12057 | add_const_value_attribute (var_die, rtl); | |
2eb674c9 | 12058 | /* If the host and target are sane, try harder. */ |
12059 | else if (CHAR_BIT == 8 && BITS_PER_UNIT == 8 | |
12060 | && initializer_constant_valid_p (init, type)) | |
12061 | { | |
12062 | HOST_WIDE_INT size = int_size_in_bytes (TREE_TYPE (init)); | |
12063 | if (size > 0 && (int) size == size) | |
12064 | { | |
12065 | unsigned char *array = GGC_CNEWVEC (unsigned char, size); | |
12066 | ||
12067 | if (native_encode_initializer (init, array, size)) | |
12068 | add_AT_vec (var_die, DW_AT_const_value, size, 1, array); | |
12069 | } | |
12070 | } | |
eabb26f3 | 12071 | } |
ac02093f | 12072 | |
89fa767a | 12073 | /* Convert the CFI instructions for the current function into a |
12074 | location list. This is used for DW_AT_frame_base when we targeting | |
12075 | a dwarf2 consumer that does not support the dwarf3 | |
12076 | DW_OP_call_frame_cfa. OFFSET is a constant to be added to all CFA | |
12077 | expressions. */ | |
12d886b8 | 12078 | |
12079 | static dw_loc_list_ref | |
89fa767a | 12080 | convert_cfa_to_fb_loc_list (HOST_WIDE_INT offset) |
12d886b8 | 12081 | { |
12082 | dw_fde_ref fde; | |
12083 | dw_loc_list_ref list, *list_tail; | |
12084 | dw_cfi_ref cfi; | |
12085 | dw_cfa_location last_cfa, next_cfa; | |
12086 | const char *start_label, *last_label, *section; | |
12087 | ||
c0fd44c1 | 12088 | fde = current_fde (); |
12089 | gcc_assert (fde != NULL); | |
12d886b8 | 12090 | |
12091 | section = secname_for_decl (current_function_decl); | |
12092 | list_tail = &list; | |
12093 | list = NULL; | |
12094 | ||
12095 | next_cfa.reg = INVALID_REGNUM; | |
12096 | next_cfa.offset = 0; | |
12097 | next_cfa.indirect = 0; | |
12098 | next_cfa.base_offset = 0; | |
12099 | ||
12100 | start_label = fde->dw_fde_begin; | |
12101 | ||
12102 | /* ??? Bald assumption that the CIE opcode list does not contain | |
12103 | advance opcodes. */ | |
12104 | for (cfi = cie_cfi_head; cfi; cfi = cfi->dw_cfi_next) | |
12105 | lookup_cfa_1 (cfi, &next_cfa); | |
12106 | ||
12107 | last_cfa = next_cfa; | |
12108 | last_label = start_label; | |
12109 | ||
12110 | for (cfi = fde->dw_fde_cfi; cfi; cfi = cfi->dw_cfi_next) | |
12111 | switch (cfi->dw_cfi_opc) | |
12112 | { | |
bea04f76 | 12113 | case DW_CFA_set_loc: |
12d886b8 | 12114 | case DW_CFA_advance_loc1: |
12115 | case DW_CFA_advance_loc2: | |
12116 | case DW_CFA_advance_loc4: | |
12117 | if (!cfa_equal_p (&last_cfa, &next_cfa)) | |
12118 | { | |
89fa767a | 12119 | *list_tail = new_loc_list (build_cfa_loc (&last_cfa, offset), |
12120 | start_label, last_label, section, | |
12121 | list == NULL); | |
12d886b8 | 12122 | |
12123 | list_tail = &(*list_tail)->dw_loc_next; | |
12124 | last_cfa = next_cfa; | |
12125 | start_label = last_label; | |
12126 | } | |
12127 | last_label = cfi->dw_cfi_oprnd1.dw_cfi_addr; | |
12128 | break; | |
12129 | ||
12130 | case DW_CFA_advance_loc: | |
12131 | /* The encoding is complex enough that we should never emit this. */ | |
12132 | case DW_CFA_remember_state: | |
12133 | case DW_CFA_restore_state: | |
12134 | /* We don't handle these two in this function. It would be possible | |
12135 | if it were to be required. */ | |
12136 | gcc_unreachable (); | |
12137 | ||
12138 | default: | |
12139 | lookup_cfa_1 (cfi, &next_cfa); | |
12140 | break; | |
12141 | } | |
12142 | ||
12143 | if (!cfa_equal_p (&last_cfa, &next_cfa)) | |
12144 | { | |
89fa767a | 12145 | *list_tail = new_loc_list (build_cfa_loc (&last_cfa, offset), |
12146 | start_label, last_label, section, | |
12147 | list == NULL); | |
12d886b8 | 12148 | list_tail = &(*list_tail)->dw_loc_next; |
12149 | start_label = last_label; | |
12150 | } | |
89fa767a | 12151 | *list_tail = new_loc_list (build_cfa_loc (&next_cfa, offset), |
12152 | start_label, fde->dw_fde_end, section, | |
12153 | list == NULL); | |
12d886b8 | 12154 | |
12155 | return list; | |
12156 | } | |
12157 | ||
89fa767a | 12158 | /* Compute a displacement from the "steady-state frame pointer" to the |
12159 | frame base (often the same as the CFA), and store it in | |
12160 | frame_pointer_fb_offset. OFFSET is added to the displacement | |
12161 | before the latter is negated. */ | |
12d886b8 | 12162 | |
12163 | static void | |
89fa767a | 12164 | compute_frame_pointer_to_fb_displacement (HOST_WIDE_INT offset) |
12d886b8 | 12165 | { |
da72c083 | 12166 | rtx reg, elim; |
12167 | ||
12168 | #ifdef FRAME_POINTER_CFA_OFFSET | |
12169 | reg = frame_pointer_rtx; | |
89fa767a | 12170 | offset += FRAME_POINTER_CFA_OFFSET (current_function_decl); |
da72c083 | 12171 | #else |
12172 | reg = arg_pointer_rtx; | |
89fa767a | 12173 | offset += ARG_POINTER_CFA_OFFSET (current_function_decl); |
da72c083 | 12174 | #endif |
12d886b8 | 12175 | |
da72c083 | 12176 | elim = eliminate_regs (reg, VOIDmode, NULL_RTX); |
12177 | if (GET_CODE (elim) == PLUS) | |
12178 | { | |
12179 | offset += INTVAL (XEXP (elim, 1)); | |
12180 | elim = XEXP (elim, 0); | |
12181 | } | |
27a7a23a | 12182 | |
12183 | gcc_assert ((SUPPORTS_STACK_ALIGNMENT | |
12184 | && (elim == hard_frame_pointer_rtx | |
12185 | || elim == stack_pointer_rtx)) | |
12186 | || elim == (frame_pointer_needed | |
12187 | ? hard_frame_pointer_rtx | |
12188 | : stack_pointer_rtx)); | |
12d886b8 | 12189 | |
89fa767a | 12190 | frame_pointer_fb_offset = -offset; |
12d886b8 | 12191 | } |
12192 | ||
df07c3ae | 12193 | /* Generate a DW_AT_name attribute given some string value to be included as |
30ade641 | 12194 | the value of the attribute. */ |
ec1e49cc | 12195 | |
ff279357 | 12196 | static void |
8ec3a57b | 12197 | add_name_attribute (dw_die_ref die, const char *name_string) |
30ade641 | 12198 | { |
ec1e49cc | 12199 | if (name_string != NULL && *name_string != 0) |
155b05dc | 12200 | { |
12201 | if (demangle_name_func) | |
12202 | name_string = (*demangle_name_func) (name_string); | |
12203 | ||
12204 | add_AT_string (die, DW_AT_name, name_string); | |
12205 | } | |
30ade641 | 12206 | } |
12207 | ||
df07c3ae | 12208 | /* Generate a DW_AT_comp_dir attribute for DIE. */ |
ff279357 | 12209 | |
12210 | static void | |
8ec3a57b | 12211 | add_comp_dir_attribute (dw_die_ref die) |
ff279357 | 12212 | { |
e7aa92b2 | 12213 | const char *wd = get_src_pwd (); |
ff279357 | 12214 | if (wd != NULL) |
5f1f2de5 | 12215 | add_AT_string (die, DW_AT_comp_dir, remap_debug_filename (wd)); |
ff279357 | 12216 | } |
12217 | ||
30ade641 | 12218 | /* Given a tree node describing an array bound (either lower or upper) output |
b58d53bf | 12219 | a representation for that bound. */ |
ec1e49cc | 12220 | |
30ade641 | 12221 | static void |
8ec3a57b | 12222 | add_bound_info (dw_die_ref subrange_die, enum dwarf_attribute bound_attr, tree bound) |
30ade641 | 12223 | { |
30ade641 | 12224 | switch (TREE_CODE (bound)) |
12225 | { | |
12226 | case ERROR_MARK: | |
12227 | return; | |
12228 | ||
04641143 | 12229 | /* All fixed-bounds are represented by INTEGER_CST nodes. */ |
30ade641 | 12230 | case INTEGER_CST: |
5d844ba2 | 12231 | if (! host_integerp (bound, 0) |
12232 | || (bound_attr == DW_AT_lower_bound | |
af4d39d8 | 12233 | && (((is_c_family () || is_java ()) && integer_zerop (bound)) |
5d844ba2 | 12234 | || (is_fortran () && integer_onep (bound))))) |
aab2cf92 | 12235 | /* Use the default. */ |
5d844ba2 | 12236 | ; |
0defae70 | 12237 | else |
5d844ba2 | 12238 | add_AT_unsigned (subrange_die, bound_attr, tree_low_cst (bound, 0)); |
30ade641 | 12239 | break; |
12240 | ||
72dd6141 | 12241 | CASE_CONVERT: |
f96c43fb | 12242 | case VIEW_CONVERT_EXPR: |
34425fdc | 12243 | add_bound_info (subrange_die, bound_attr, TREE_OPERAND (bound, 0)); |
12244 | break; | |
f80d1bcd | 12245 | |
30ade641 | 12246 | case SAVE_EXPR: |
30ade641 | 12247 | break; |
8a8bfbe7 | 12248 | |
678d90bb | 12249 | case VAR_DECL: |
9ed904da | 12250 | case PARM_DECL: |
4ee9c684 | 12251 | case RESULT_DECL: |
9ed904da | 12252 | { |
12253 | dw_die_ref decl_die = lookup_decl_die (bound); | |
6cf159a6 | 12254 | dw_loc_descr_ref loc; |
9ed904da | 12255 | |
12256 | /* ??? Can this happen, or should the variable have been bound | |
12257 | first? Probably it can, since I imagine that we try to create | |
12258 | the types of parameters in the order in which they exist in | |
ac02093f | 12259 | the list, and won't have created a forward reference to a |
9ed904da | 12260 | later parameter. */ |
12261 | if (decl_die != NULL) | |
12262 | add_AT_die_ref (subrange_die, bound_attr, decl_die); | |
6cf159a6 | 12263 | else |
12264 | { | |
12265 | loc = loc_descriptor_from_tree_1 (bound, 0); | |
12266 | add_AT_location_description (subrange_die, bound_attr, loc); | |
12267 | } | |
9ed904da | 12268 | break; |
12269 | } | |
678d90bb | 12270 | |
8a8bfbe7 | 12271 | default: |
9ed904da | 12272 | { |
12273 | /* Otherwise try to create a stack operation procedure to | |
12274 | evaluate the value of the array bound. */ | |
12275 | ||
12276 | dw_die_ref ctx, decl_die; | |
12277 | dw_loc_descr_ref loc; | |
12278 | ||
afcf285e | 12279 | loc = loc_descriptor_from_tree (bound); |
9ed904da | 12280 | if (loc == NULL) |
12281 | break; | |
12282 | ||
86e12d28 | 12283 | if (current_function_decl == 0) |
12284 | ctx = comp_unit_die; | |
12285 | else | |
12286 | ctx = lookup_decl_die (current_function_decl); | |
9ed904da | 12287 | |
15cfae4e | 12288 | decl_die = new_die (DW_TAG_variable, ctx, bound); |
9ed904da | 12289 | add_AT_flag (decl_die, DW_AT_artificial, 1); |
12290 | add_type_attribute (decl_die, TREE_TYPE (bound), 1, 0, ctx); | |
12291 | add_AT_loc (decl_die, DW_AT_location, loc); | |
12292 | ||
12293 | add_AT_die_ref (subrange_die, bound_attr, decl_die); | |
12294 | break; | |
12295 | } | |
30ade641 | 12296 | } |
12297 | } | |
12298 | ||
544cd34c | 12299 | /* Add subscript info to TYPE_DIE, describing an array TYPE, collapsing |
12300 | possibly nested array subscripts in a flat sequence if COLLAPSE_P is true. | |
12301 | Note that the block of subscript information for an array type also | |
12302 | includes information about the element type of the given array type. */ | |
ec1e49cc | 12303 | |
30ade641 | 12304 | static void |
544cd34c | 12305 | add_subscript_info (dw_die_ref type_die, tree type, bool collapse_p) |
30ade641 | 12306 | { |
19cb6b50 | 12307 | unsigned dimension_number; |
19cb6b50 | 12308 | tree lower, upper; |
12309 | dw_die_ref subrange_die; | |
30ade641 | 12310 | |
30ade641 | 12311 | for (dimension_number = 0; |
544cd34c | 12312 | TREE_CODE (type) == ARRAY_TYPE && (dimension_number == 0 || collapse_p); |
30ade641 | 12313 | type = TREE_TYPE (type), dimension_number++) |
8c3f468d | 12314 | { |
19cb6b50 | 12315 | tree domain = TYPE_DOMAIN (type); |
30ade641 | 12316 | |
cdba1d8f | 12317 | if (TYPE_STRING_FLAG (type) && is_fortran () && dimension_number > 0) |
12318 | break; | |
12319 | ||
30ade641 | 12320 | /* Arrays come in three flavors: Unspecified bounds, fixed bounds, |
f80d1bcd | 12321 | and (in GNU C only) variable bounds. Handle all three forms |
c83a163c | 12322 | here. */ |
15cfae4e | 12323 | subrange_die = new_die (DW_TAG_subrange_type, type_die, NULL); |
30ade641 | 12324 | if (domain) |
12325 | { | |
12326 | /* We have an array type with specified bounds. */ | |
12327 | lower = TYPE_MIN_VALUE (domain); | |
12328 | upper = TYPE_MAX_VALUE (domain); | |
12329 | ||
139c3f48 | 12330 | /* Define the index type. */ |
5b67860b | 12331 | if (TREE_TYPE (domain)) |
678d90bb | 12332 | { |
12333 | /* ??? This is probably an Ada unnamed subrange type. Ignore the | |
12334 | TREE_TYPE field. We can't emit debug info for this | |
12335 | because it is an unnamed integral type. */ | |
12336 | if (TREE_CODE (domain) == INTEGER_TYPE | |
12337 | && TYPE_NAME (domain) == NULL_TREE | |
12338 | && TREE_CODE (TREE_TYPE (domain)) == INTEGER_TYPE | |
12339 | && TYPE_NAME (TREE_TYPE (domain)) == NULL_TREE) | |
f80d1bcd | 12340 | ; |
678d90bb | 12341 | else |
12342 | add_type_attribute (subrange_die, TREE_TYPE (domain), 0, 0, | |
12343 | type_die); | |
12344 | } | |
5b67860b | 12345 | |
f52483b5 | 12346 | /* ??? If upper is NULL, the array has unspecified length, |
12347 | but it does have a lower bound. This happens with Fortran | |
12348 | dimension arr(N:*) | |
8ec3a57b | 12349 | Since the debugger is definitely going to need to know N |
f52483b5 | 12350 | to produce useful results, go ahead and output the lower |
12351 | bound solo, and hope the debugger can cope. */ | |
12352 | ||
0defae70 | 12353 | add_bound_info (subrange_die, DW_AT_lower_bound, lower); |
f52483b5 | 12354 | if (upper) |
12355 | add_bound_info (subrange_die, DW_AT_upper_bound, upper); | |
30ade641 | 12356 | } |
ec1e49cc | 12357 | |
8c3f468d | 12358 | /* Otherwise we have an array type with an unspecified length. The |
12359 | DWARF-2 spec does not say how to handle this; let's just leave out the | |
12360 | bounds. */ | |
30ade641 | 12361 | } |
30ade641 | 12362 | } |
12363 | ||
12364 | static void | |
8ec3a57b | 12365 | add_byte_size_attribute (dw_die_ref die, tree tree_node) |
30ade641 | 12366 | { |
19cb6b50 | 12367 | unsigned size; |
30ade641 | 12368 | |
12369 | switch (TREE_CODE (tree_node)) | |
12370 | { | |
12371 | case ERROR_MARK: | |
12372 | size = 0; | |
12373 | break; | |
12374 | case ENUMERAL_TYPE: | |
12375 | case RECORD_TYPE: | |
12376 | case UNION_TYPE: | |
12377 | case QUAL_UNION_TYPE: | |
12378 | size = int_size_in_bytes (tree_node); | |
12379 | break; | |
12380 | case FIELD_DECL: | |
12381 | /* For a data member of a struct or union, the DW_AT_byte_size is | |
c83a163c | 12382 | generally given as the number of bytes normally allocated for an |
12383 | object of the *declared* type of the member itself. This is true | |
12384 | even for bit-fields. */ | |
30ade641 | 12385 | size = simple_type_size_in_bits (field_type (tree_node)) / BITS_PER_UNIT; |
12386 | break; | |
12387 | default: | |
7bd4f6b6 | 12388 | gcc_unreachable (); |
30ade641 | 12389 | } |
12390 | ||
12391 | /* Note that `size' might be -1 when we get to this point. If it is, that | |
12392 | indicates that the byte size of the entity in question is variable. We | |
12393 | have no good way of expressing this fact in Dwarf at the present time, | |
12394 | so just let the -1 pass on through. */ | |
30ade641 | 12395 | add_AT_unsigned (die, DW_AT_byte_size, size); |
12396 | } | |
12397 | ||
12398 | /* For a FIELD_DECL node which represents a bit-field, output an attribute | |
12399 | which specifies the distance in bits from the highest order bit of the | |
12400 | "containing object" for the bit-field to the highest order bit of the | |
12401 | bit-field itself. | |
12402 | ||
8c3f468d | 12403 | For any given bit-field, the "containing object" is a hypothetical object |
12404 | (of some integral or enum type) within which the given bit-field lives. The | |
12405 | type of this hypothetical "containing object" is always the same as the | |
12406 | declared type of the individual bit-field itself. The determination of the | |
12407 | exact location of the "containing object" for a bit-field is rather | |
12408 | complicated. It's handled by the `field_byte_offset' function (above). | |
30ade641 | 12409 | |
12410 | Note that it is the size (in bytes) of the hypothetical "containing object" | |
12411 | which will be given in the DW_AT_byte_size attribute for this bit-field. | |
12412 | (See `byte_size_attribute' above). */ | |
ec1e49cc | 12413 | |
12414 | static inline void | |
8ec3a57b | 12415 | add_bit_offset_attribute (dw_die_ref die, tree decl) |
30ade641 | 12416 | { |
5d844ba2 | 12417 | HOST_WIDE_INT object_offset_in_bytes = field_byte_offset (decl); |
12418 | tree type = DECL_BIT_FIELD_TYPE (decl); | |
12419 | HOST_WIDE_INT bitpos_int; | |
12420 | HOST_WIDE_INT highest_order_object_bit_offset; | |
12421 | HOST_WIDE_INT highest_order_field_bit_offset; | |
12422 | HOST_WIDE_INT unsigned bit_offset; | |
30ade641 | 12423 | |
7e2bfe1e | 12424 | /* Must be a field and a bit field. */ |
7bd4f6b6 | 12425 | gcc_assert (type && TREE_CODE (decl) == FIELD_DECL); |
30ade641 | 12426 | |
12427 | /* We can't yet handle bit-fields whose offsets are variable, so if we | |
12428 | encounter such things, just return without generating any attribute | |
5d844ba2 | 12429 | whatsoever. Likewise for variable or too large size. */ |
12430 | if (! host_integerp (bit_position (decl), 0) | |
12431 | || ! host_integerp (DECL_SIZE (decl), 1)) | |
ec1e49cc | 12432 | return; |
12433 | ||
5d844ba2 | 12434 | bitpos_int = int_bit_position (decl); |
30ade641 | 12435 | |
12436 | /* Note that the bit offset is always the distance (in bits) from the | |
f80d1bcd | 12437 | highest-order bit of the "containing object" to the highest-order bit of |
12438 | the bit-field itself. Since the "high-order end" of any object or field | |
30ade641 | 12439 | is different on big-endian and little-endian machines, the computation |
12440 | below must take account of these differences. */ | |
12441 | highest_order_object_bit_offset = object_offset_in_bytes * BITS_PER_UNIT; | |
12442 | highest_order_field_bit_offset = bitpos_int; | |
12443 | ||
ec1e49cc | 12444 | if (! BYTES_BIG_ENDIAN) |
30ade641 | 12445 | { |
5d844ba2 | 12446 | highest_order_field_bit_offset += tree_low_cst (DECL_SIZE (decl), 0); |
30ade641 | 12447 | highest_order_object_bit_offset += simple_type_size_in_bits (type); |
12448 | } | |
ec1e49cc | 12449 | |
12450 | bit_offset | |
12451 | = (! BYTES_BIG_ENDIAN | |
12452 | ? highest_order_object_bit_offset - highest_order_field_bit_offset | |
12453 | : highest_order_field_bit_offset - highest_order_object_bit_offset); | |
30ade641 | 12454 | |
12455 | add_AT_unsigned (die, DW_AT_bit_offset, bit_offset); | |
12456 | } | |
12457 | ||
12458 | /* For a FIELD_DECL node which represents a bit field, output an attribute | |
12459 | which specifies the length in bits of the given field. */ | |
ec1e49cc | 12460 | |
12461 | static inline void | |
8ec3a57b | 12462 | add_bit_size_attribute (dw_die_ref die, tree decl) |
30ade641 | 12463 | { |
7e2bfe1e | 12464 | /* Must be a field and a bit field. */ |
7bd4f6b6 | 12465 | gcc_assert (TREE_CODE (decl) == FIELD_DECL |
12466 | && DECL_BIT_FIELD_TYPE (decl)); | |
5d844ba2 | 12467 | |
12468 | if (host_integerp (DECL_SIZE (decl), 1)) | |
12469 | add_AT_unsigned (die, DW_AT_bit_size, tree_low_cst (DECL_SIZE (decl), 1)); | |
30ade641 | 12470 | } |
12471 | ||
464217f3 | 12472 | /* If the compiled language is ANSI C, then add a 'prototyped' |
30ade641 | 12473 | attribute, if arg types are given for the parameters of a function. */ |
ec1e49cc | 12474 | |
12475 | static inline void | |
8ec3a57b | 12476 | add_prototyped_attribute (dw_die_ref die, tree func_type) |
30ade641 | 12477 | { |
464217f3 | 12478 | if (get_AT_unsigned (comp_unit_die, DW_AT_language) == DW_LANG_C89 |
12479 | && TYPE_ARG_TYPES (func_type) != NULL) | |
12480 | add_AT_flag (die, DW_AT_prototyped, 1); | |
30ade641 | 12481 | } |
12482 | ||
30ade641 | 12483 | /* Add an 'abstract_origin' attribute below a given DIE. The DIE is found |
12484 | by looking in either the type declaration or object declaration | |
12485 | equate table. */ | |
ec1e49cc | 12486 | |
ebcb0478 | 12487 | static inline dw_die_ref |
8ec3a57b | 12488 | add_abstract_origin_attribute (dw_die_ref die, tree origin) |
30ade641 | 12489 | { |
12490 | dw_die_ref origin_die = NULL; | |
b2ca6017 | 12491 | |
bb0f15b4 | 12492 | if (TREE_CODE (origin) != FUNCTION_DECL) |
6c92ff4f | 12493 | { |
12494 | /* We may have gotten separated from the block for the inlined | |
12495 | function, if we're in an exception handler or some such; make | |
12496 | sure that the abstract function has been written out. | |
12497 | ||
c83a163c | 12498 | Doing this for nested functions is wrong, however; functions are |
6c92ff4f | 12499 | distinct units, and our context might not even be inline. */ |
f929a98a | 12500 | tree fn = origin; |
8c3f468d | 12501 | |
f929a98a | 12502 | if (TYPE_P (fn)) |
12503 | fn = TYPE_STUB_DECL (fn); | |
61a9389f | 12504 | |
f10b7a77 | 12505 | fn = decl_function_context (fn); |
6c92ff4f | 12506 | if (fn) |
f414ade2 | 12507 | dwarf2out_abstract_function (fn); |
6c92ff4f | 12508 | } |
e3b3c2ae | 12509 | |
9308e976 | 12510 | if (DECL_P (origin)) |
ec1e49cc | 12511 | origin_die = lookup_decl_die (origin); |
9308e976 | 12512 | else if (TYPE_P (origin)) |
ec1e49cc | 12513 | origin_die = lookup_type_die (origin); |
12514 | ||
7c0a8197 | 12515 | /* XXX: Functions that are never lowered don't always have correct block |
12516 | trees (in the case of java, they simply have no block tree, in some other | |
12517 | languages). For these functions, there is nothing we can really do to | |
12518 | output correct debug info for inlined functions in all cases. Rather | |
89f18f73 | 12519 | than die, we'll just produce deficient debug info now, in that we will |
7c0a8197 | 12520 | have variables without a proper abstract origin. In the future, when all |
12521 | functions are lowered, we should re-add a gcc_assert (origin_die) | |
12522 | here. */ | |
f80d1bcd | 12523 | |
7c0a8197 | 12524 | if (origin_die) |
ebcb0478 | 12525 | add_AT_die_ref (die, DW_AT_abstract_origin, origin_die); |
12526 | return origin_die; | |
30ade641 | 12527 | } |
12528 | ||
6ed29fb8 | 12529 | /* We do not currently support the pure_virtual attribute. */ |
12530 | ||
ec1e49cc | 12531 | static inline void |
8ec3a57b | 12532 | add_pure_or_virtual_attribute (dw_die_ref die, tree func_decl) |
30ade641 | 12533 | { |
6efd403b | 12534 | if (DECL_VINDEX (func_decl)) |
30ade641 | 12535 | { |
6ed29fb8 | 12536 | add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual); |
5d844ba2 | 12537 | |
12538 | if (host_integerp (DECL_VINDEX (func_decl), 0)) | |
12539 | add_AT_loc (die, DW_AT_vtable_elem_location, | |
12540 | new_loc_descr (DW_OP_constu, | |
12541 | tree_low_cst (DECL_VINDEX (func_decl), 0), | |
12542 | 0)); | |
ec1e49cc | 12543 | |
6efd403b | 12544 | /* GNU extension: Record what type this method came from originally. */ |
12545 | if (debug_info_level > DINFO_LEVEL_TERSE) | |
12546 | add_AT_die_ref (die, DW_AT_containing_type, | |
12547 | lookup_type_die (DECL_CONTEXT (func_decl))); | |
30ade641 | 12548 | } |
12549 | } | |
12550 | \f | |
840b696a | 12551 | /* Add source coordinate attributes for the given decl. */ |
ec1e49cc | 12552 | |
840b696a | 12553 | static void |
8ec3a57b | 12554 | add_src_coords_attributes (dw_die_ref die, tree decl) |
840b696a | 12555 | { |
7bd3dcc4 | 12556 | expanded_location s = expand_location (DECL_SOURCE_LOCATION (decl)); |
ec1e49cc | 12557 | |
69278c24 | 12558 | add_AT_file (die, DW_AT_decl_file, lookup_filename (s.file)); |
7bd3dcc4 | 12559 | add_AT_unsigned (die, DW_AT_decl_line, s.line); |
840b696a | 12560 | } |
12561 | ||
df07c3ae | 12562 | /* Add a DW_AT_name attribute and source coordinate attribute for the |
30ade641 | 12563 | given decl, but only if it actually has a name. */ |
ec1e49cc | 12564 | |
30ade641 | 12565 | static void |
8ec3a57b | 12566 | add_name_and_src_coords_attributes (dw_die_ref die, tree decl) |
30ade641 | 12567 | { |
19cb6b50 | 12568 | tree decl_name; |
ec1e49cc | 12569 | |
f80d1bcd | 12570 | decl_name = DECL_NAME (decl); |
ec1e49cc | 12571 | if (decl_name != NULL && IDENTIFIER_POINTER (decl_name) != NULL) |
30ade641 | 12572 | { |
59561872 | 12573 | add_name_attribute (die, dwarf2_name (decl, 0)); |
c90bf86c | 12574 | if (! DECL_ARTIFICIAL (decl)) |
12575 | add_src_coords_attributes (die, decl); | |
2b553659 | 12576 | |
59561872 | 12577 | if ((TREE_CODE (decl) == FUNCTION_DECL || TREE_CODE (decl) == VAR_DECL) |
4e1d939e | 12578 | && TREE_PUBLIC (decl) |
8f80e66d | 12579 | && DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl) |
23bf35fe | 12580 | && !DECL_ABSTRACT (decl) |
7d022cbc | 12581 | && !(TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl)) |
12582 | && !is_fortran ()) | |
59561872 | 12583 | add_AT_string (die, DW_AT_MIPS_linkage_name, |
12584 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl))); | |
30ade641 | 12585 | } |
8d60d2bc | 12586 | |
12587 | #ifdef VMS_DEBUGGING_INFO | |
8d60d2bc | 12588 | /* Get the function's name, as described by its RTL. This may be different |
12589 | from the DECL_NAME name used in the source file. */ | |
12590 | if (TREE_CODE (decl) == FUNCTION_DECL && TREE_ASM_WRITTEN (decl)) | |
7facaa35 | 12591 | { |
12592 | add_AT_addr (die, DW_AT_VMS_rtnbeg_pd_address, | |
12593 | XEXP (DECL_RTL (decl), 0)); | |
62aedc4c | 12594 | VEC_safe_push (tree, gc, used_rtx_array, XEXP (DECL_RTL (decl), 0)); |
7facaa35 | 12595 | } |
8d60d2bc | 12596 | #endif |
30ade641 | 12597 | } |
12598 | ||
f80d1bcd | 12599 | /* Push a new declaration scope. */ |
ec1e49cc | 12600 | |
30ade641 | 12601 | static void |
8ec3a57b | 12602 | push_decl_scope (tree scope) |
30ade641 | 12603 | { |
4a940e75 | 12604 | VEC_safe_push (tree, gc, decl_scope_table, scope); |
30ade641 | 12605 | } |
12606 | ||
14b40abb | 12607 | /* Pop a declaration scope. */ |
8c3f468d | 12608 | |
14b40abb | 12609 | static inline void |
8ec3a57b | 12610 | pop_decl_scope (void) |
14b40abb | 12611 | { |
4a940e75 | 12612 | VEC_pop (tree, decl_scope_table); |
14b40abb | 12613 | } |
12614 | ||
12615 | /* Return the DIE for the scope that immediately contains this type. | |
12616 | Non-named types get global scope. Named types nested in other | |
12617 | types get their containing scope if it's open, or global scope | |
12618 | otherwise. All other types (i.e. function-local named types) get | |
12619 | the current active scope. */ | |
ec1e49cc | 12620 | |
30ade641 | 12621 | static dw_die_ref |
8ec3a57b | 12622 | scope_die_for (tree t, dw_die_ref context_die) |
30ade641 | 12623 | { |
19cb6b50 | 12624 | dw_die_ref scope_die = NULL; |
12625 | tree containing_scope; | |
12626 | int i; | |
30ade641 | 12627 | |
14b40abb | 12628 | /* Non-types always go in the current scope. */ |
7bd4f6b6 | 12629 | gcc_assert (TYPE_P (t)); |
14b40abb | 12630 | |
12631 | containing_scope = TYPE_CONTEXT (t); | |
db42c2b2 | 12632 | |
e89530cd | 12633 | /* Use the containing namespace if it was passed in (for a declaration). */ |
7c43cc0e | 12634 | if (containing_scope && TREE_CODE (containing_scope) == NAMESPACE_DECL) |
e89530cd | 12635 | { |
12636 | if (context_die == lookup_decl_die (containing_scope)) | |
12637 | /* OK */; | |
12638 | else | |
12639 | containing_scope = NULL_TREE; | |
12640 | } | |
7c43cc0e | 12641 | |
5ef8d04d | 12642 | /* Ignore function type "scopes" from the C frontend. They mean that |
12643 | a tagged type is local to a parmlist of a function declarator, but | |
12644 | that isn't useful to DWARF. */ | |
12645 | if (containing_scope && TREE_CODE (containing_scope) == FUNCTION_TYPE) | |
12646 | containing_scope = NULL_TREE; | |
12647 | ||
ec1e49cc | 12648 | if (containing_scope == NULL_TREE) |
12649 | scope_die = comp_unit_die; | |
14b40abb | 12650 | else if (TYPE_P (containing_scope)) |
5c65b85a | 12651 | { |
14b40abb | 12652 | /* For types, we can just look up the appropriate DIE. But |
12653 | first we check to see if we're in the middle of emitting it | |
12654 | so we know where the new DIE should go. */ | |
4a940e75 | 12655 | for (i = VEC_length (tree, decl_scope_table) - 1; i >= 0; --i) |
12656 | if (VEC_index (tree, decl_scope_table, i) == containing_scope) | |
5c65b85a | 12657 | break; |
12658 | ||
12659 | if (i < 0) | |
12660 | { | |
7bd4f6b6 | 12661 | gcc_assert (debug_info_level <= DINFO_LEVEL_TERSE |
12662 | || TREE_ASM_WRITTEN (containing_scope)); | |
5c65b85a | 12663 | |
12664 | /* If none of the current dies are suitable, we get file scope. */ | |
12665 | scope_die = comp_unit_die; | |
12666 | } | |
12667 | else | |
14b40abb | 12668 | scope_die = lookup_type_die (containing_scope); |
5c65b85a | 12669 | } |
30ade641 | 12670 | else |
14b40abb | 12671 | scope_die = context_die; |
ec1e49cc | 12672 | |
30ade641 | 12673 | return scope_die; |
12674 | } | |
12675 | ||
8c3f468d | 12676 | /* Returns nonzero if CONTEXT_DIE is internal to a function. */ |
14b40abb | 12677 | |
12678 | static inline int | |
8ec3a57b | 12679 | local_scope_p (dw_die_ref context_die) |
30ade641 | 12680 | { |
14b40abb | 12681 | for (; context_die; context_die = context_die->die_parent) |
12682 | if (context_die->die_tag == DW_TAG_inlined_subroutine | |
12683 | || context_die->die_tag == DW_TAG_subprogram) | |
12684 | return 1; | |
8c3f468d | 12685 | |
14b40abb | 12686 | return 0; |
30ade641 | 12687 | } |
12688 | ||
a974aa3e | 12689 | /* Returns nonzero if CONTEXT_DIE is a class. */ |
ee1cd281 | 12690 | |
12691 | static inline int | |
a974aa3e | 12692 | class_scope_p (dw_die_ref context_die) |
ee1cd281 | 12693 | { |
12694 | return (context_die | |
12695 | && (context_die->die_tag == DW_TAG_structure_type | |
03a61d93 | 12696 | || context_die->die_tag == DW_TAG_class_type |
12697 | || context_die->die_tag == DW_TAG_interface_type | |
a974aa3e | 12698 | || context_die->die_tag == DW_TAG_union_type)); |
12699 | } | |
12700 | ||
12701 | /* Returns nonzero if CONTEXT_DIE is a class or namespace, for deciding | |
12702 | whether or not to treat a DIE in this context as a declaration. */ | |
12703 | ||
12704 | static inline int | |
12705 | class_or_namespace_scope_p (dw_die_ref context_die) | |
12706 | { | |
12707 | return (class_scope_p (context_die) | |
12708 | || (context_die && context_die->die_tag == DW_TAG_namespace)); | |
ee1cd281 | 12709 | } |
12710 | ||
30ade641 | 12711 | /* Many forms of DIEs require a "type description" attribute. This |
12712 | routine locates the proper "type descriptor" die for the type given | |
df07c3ae | 12713 | by 'type', and adds a DW_AT_type attribute below the given die. */ |
ec1e49cc | 12714 | |
30ade641 | 12715 | static void |
8ec3a57b | 12716 | add_type_attribute (dw_die_ref object_die, tree type, int decl_const, |
12717 | int decl_volatile, dw_die_ref context_die) | |
30ade641 | 12718 | { |
19cb6b50 | 12719 | enum tree_code code = TREE_CODE (type); |
12720 | dw_die_ref type_die = NULL; | |
30ade641 | 12721 | |
06f0b99c | 12722 | /* ??? If this type is an unnamed subrange type of an integral, floating-point |
12723 | or fixed-point type, use the inner type. This is because we have no | |
678d90bb | 12724 | support for unnamed types in base_type_die. This can happen if this is |
12725 | an Ada subrange type. Correct solution is emit a subrange type die. */ | |
06f0b99c | 12726 | if ((code == INTEGER_TYPE || code == REAL_TYPE || code == FIXED_POINT_TYPE) |
34425fdc | 12727 | && TREE_TYPE (type) != 0 && TYPE_NAME (type) == 0) |
12728 | type = TREE_TYPE (type), code = TREE_CODE (type); | |
12729 | ||
8c3f468d | 12730 | if (code == ERROR_MARK |
12731 | /* Handle a special case. For functions whose return type is void, we | |
12732 | generate *no* type attribute. (Note that no object may have type | |
12733 | `void', so this only applies to function return types). */ | |
12734 | || code == VOID_TYPE) | |
34425fdc | 12735 | return; |
30ade641 | 12736 | |
30ade641 | 12737 | type_die = modified_type_die (type, |
12738 | decl_const || TYPE_READONLY (type), | |
12739 | decl_volatile || TYPE_VOLATILE (type), | |
db42c2b2 | 12740 | context_die); |
8c3f468d | 12741 | |
30ade641 | 12742 | if (type_die != NULL) |
ec1e49cc | 12743 | add_AT_die_ref (object_die, DW_AT_type, type_die); |
30ade641 | 12744 | } |
12745 | ||
8ff30ff6 | 12746 | /* Given an object die, add the calling convention attribute for the |
12747 | function call type. */ | |
12748 | static void | |
7d022cbc | 12749 | add_calling_convention_attribute (dw_die_ref subr_die, tree decl) |
8ff30ff6 | 12750 | { |
12751 | enum dwarf_calling_convention value = DW_CC_normal; | |
12752 | ||
8458f4ca | 12753 | value = ((enum dwarf_calling_convention) |
12754 | targetm.dwarf_calling_convention (TREE_TYPE (decl))); | |
7d022cbc | 12755 | |
12756 | /* DWARF doesn't provide a way to identify a program's source-level | |
12757 | entry point. DW_AT_calling_convention attributes are only meant | |
12758 | to describe functions' calling conventions. However, lacking a | |
12759 | better way to signal the Fortran main program, we use this for the | |
12760 | time being, following existing custom. */ | |
12761 | if (is_fortran () | |
12762 | && !strcmp (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)), "MAIN__")) | |
12763 | value = DW_CC_program; | |
8ff30ff6 | 12764 | |
785a2b1d | 12765 | /* Only add the attribute if the backend requests it, and |
12766 | is not DW_CC_normal. */ | |
12767 | if (value && (value != DW_CC_normal)) | |
8ff30ff6 | 12768 | add_AT_unsigned (subr_die, DW_AT_calling_convention, value); |
12769 | } | |
12770 | ||
30ade641 | 12771 | /* Given a tree pointer to a struct, class, union, or enum type node, return |
12772 | a pointer to the (string) tag name for the given type, or zero if the type | |
12773 | was declared without a tag. */ | |
ec1e49cc | 12774 | |
1e034a40 | 12775 | static const char * |
5493cb9a | 12776 | type_tag (const_tree type) |
30ade641 | 12777 | { |
19cb6b50 | 12778 | const char *name = 0; |
30ade641 | 12779 | |
12780 | if (TYPE_NAME (type) != 0) | |
12781 | { | |
19cb6b50 | 12782 | tree t = 0; |
30ade641 | 12783 | |
12784 | /* Find the IDENTIFIER_NODE for the type name. */ | |
12785 | if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE) | |
12786 | t = TYPE_NAME (type); | |
6ed29fb8 | 12787 | |
f80d1bcd | 12788 | /* The g++ front end makes the TYPE_NAME of *each* tagged type point to |
c83a163c | 12789 | a TYPE_DECL node, regardless of whether or not a `typedef' was |
12790 | involved. */ | |
6efd403b | 12791 | else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL |
12792 | && ! DECL_IGNORED_P (TYPE_NAME (type))) | |
facb12b2 | 12793 | { |
12794 | /* We want to be extra verbose. Don't call dwarf_name if | |
12795 | DECL_NAME isn't set. The default hook for decl_printable_name | |
12796 | doesn't like that, and in this context it's correct to return | |
12797 | 0, instead of "<anonymous>" or the like. */ | |
12798 | if (DECL_NAME (TYPE_NAME (type))) | |
12799 | name = lang_hooks.dwarf_name (TYPE_NAME (type), 2); | |
12800 | } | |
6ed29fb8 | 12801 | |
30ade641 | 12802 | /* Now get the name as a string, or invent one. */ |
facb12b2 | 12803 | if (!name && t != 0) |
6efd403b | 12804 | name = IDENTIFIER_POINTER (t); |
30ade641 | 12805 | } |
ec1e49cc | 12806 | |
30ade641 | 12807 | return (name == 0 || *name == '\0') ? 0 : name; |
12808 | } | |
12809 | ||
12810 | /* Return the type associated with a data member, make a special check | |
12811 | for bit field types. */ | |
ec1e49cc | 12812 | |
12813 | static inline tree | |
5493cb9a | 12814 | member_declared_type (const_tree member) |
30ade641 | 12815 | { |
ec1e49cc | 12816 | return (DECL_BIT_FIELD_TYPE (member) |
8c3f468d | 12817 | ? DECL_BIT_FIELD_TYPE (member) : TREE_TYPE (member)); |
30ade641 | 12818 | } |
12819 | ||
dc7a29ce | 12820 | /* Get the decl's label, as described by its RTL. This may be different |
30ade641 | 12821 | from the DECL_NAME name used in the source file. */ |
ec1e49cc | 12822 | |
0e93a6ac | 12823 | #if 0 |
1e034a40 | 12824 | static const char * |
8ec3a57b | 12825 | decl_start_label (tree decl) |
30ade641 | 12826 | { |
12827 | rtx x; | |
1e034a40 | 12828 | const char *fnname; |
8c3f468d | 12829 | |
30ade641 | 12830 | x = DECL_RTL (decl); |
7bd4f6b6 | 12831 | gcc_assert (MEM_P (x)); |
ec1e49cc | 12832 | |
30ade641 | 12833 | x = XEXP (x, 0); |
7bd4f6b6 | 12834 | gcc_assert (GET_CODE (x) == SYMBOL_REF); |
ec1e49cc | 12835 | |
30ade641 | 12836 | fnname = XSTR (x, 0); |
12837 | return fnname; | |
12838 | } | |
0e93a6ac | 12839 | #endif |
30ade641 | 12840 | \f |
ad87de1e | 12841 | /* These routines generate the internal representation of the DIE's for |
30ade641 | 12842 | the compilation unit. Debugging information is collected by walking |
464217f3 | 12843 | the declaration trees passed in from dwarf2out_decl(). */ |
30ade641 | 12844 | |
12845 | static void | |
8ec3a57b | 12846 | gen_array_type_die (tree type, dw_die_ref context_die) |
30ade641 | 12847 | { |
19cb6b50 | 12848 | dw_die_ref scope_die = scope_die_for (type, context_die); |
12849 | dw_die_ref array_die; | |
544cd34c | 12850 | |
12851 | /* GNU compilers represent multidimensional array types as sequences of one | |
12852 | dimensional array types whose element types are themselves array types. | |
12853 | We sometimes squish that down to a single array_type DIE with multiple | |
12854 | subscripts in the Dwarf debugging info. The draft Dwarf specification | |
12855 | say that we are allowed to do this kind of compression in C, because | |
12856 | there is no difference between an array of arrays and a multidimensional | |
12857 | array. We don't do this for Ada to remain as close as possible to the | |
12858 | actual representation, which is especially important against the language | |
12859 | flexibilty wrt arrays of variable size. */ | |
12860 | ||
12861 | bool collapse_nested_arrays = !is_ada (); | |
19cb6b50 | 12862 | tree element_type; |
cdba1d8f | 12863 | |
12864 | /* Emit DW_TAG_string_type for Fortran character types (with kind 1 only, as | |
12865 | DW_TAG_string_type doesn't have DW_AT_type attribute). */ | |
12866 | if (TYPE_STRING_FLAG (type) | |
12867 | && TREE_CODE (type) == ARRAY_TYPE | |
12868 | && is_fortran () | |
12869 | && TYPE_MODE (TREE_TYPE (type)) == TYPE_MODE (char_type_node)) | |
12870 | { | |
12871 | HOST_WIDE_INT size; | |
12872 | ||
12873 | array_die = new_die (DW_TAG_string_type, scope_die, type); | |
12874 | add_name_attribute (array_die, type_tag (type)); | |
12875 | equate_type_number_to_die (type, array_die); | |
12876 | size = int_size_in_bytes (type); | |
12877 | if (size >= 0) | |
12878 | add_AT_unsigned (array_die, DW_AT_byte_size, size); | |
12879 | else if (TYPE_DOMAIN (type) != NULL_TREE | |
12880 | && TYPE_MAX_VALUE (TYPE_DOMAIN (type)) != NULL_TREE | |
12881 | && DECL_P (TYPE_MAX_VALUE (TYPE_DOMAIN (type)))) | |
12882 | { | |
12883 | tree szdecl = TYPE_MAX_VALUE (TYPE_DOMAIN (type)); | |
12884 | dw_loc_descr_ref loc = loc_descriptor_from_tree (szdecl); | |
12885 | ||
12886 | size = int_size_in_bytes (TREE_TYPE (szdecl)); | |
12887 | if (loc && size > 0) | |
12888 | { | |
12889 | add_AT_loc (array_die, DW_AT_string_length, loc); | |
12890 | if (size != DWARF2_ADDR_SIZE) | |
12891 | add_AT_unsigned (array_die, DW_AT_byte_size, size); | |
12892 | } | |
12893 | } | |
12894 | return; | |
12895 | } | |
12896 | ||
544cd34c | 12897 | /* ??? The SGI dwarf reader fails for array of array of enum types |
12898 | (e.g. const enum machine_mode insn_operand_mode[2][10]) unless the inner | |
12899 | array type comes before the outer array type. We thus call gen_type_die | |
12900 | before we new_die and must prevent nested array types collapsing for this | |
12901 | target. */ | |
6ed29fb8 | 12902 | |
5b67860b | 12903 | #ifdef MIPS_DEBUGGING_INFO |
12904 | gen_type_die (TREE_TYPE (type), context_die); | |
544cd34c | 12905 | collapse_nested_arrays = false; |
5b67860b | 12906 | #endif |
12907 | ||
15cfae4e | 12908 | array_die = new_die (DW_TAG_array_type, scope_die, type); |
634906d6 | 12909 | add_name_attribute (array_die, type_tag (type)); |
12910 | equate_type_number_to_die (type, array_die); | |
12911 | ||
12912 | if (TREE_CODE (type) == VECTOR_TYPE) | |
12913 | { | |
12914 | /* The frontend feeds us a representation for the vector as a struct | |
12915 | containing an array. Pull out the array type. */ | |
12916 | type = TREE_TYPE (TYPE_FIELDS (TYPE_DEBUG_REPRESENTATION_TYPE (type))); | |
12917 | add_AT_flag (array_die, DW_AT_GNU_vector, 1); | |
12918 | } | |
5b67860b | 12919 | |
00e7d8a5 | 12920 | /* For Fortran multidimensional arrays use DW_ORD_col_major ordering. */ |
12921 | if (is_fortran () | |
12922 | && TREE_CODE (type) == ARRAY_TYPE | |
cdba1d8f | 12923 | && TREE_CODE (TREE_TYPE (type)) == ARRAY_TYPE |
12924 | && !TYPE_STRING_FLAG (TREE_TYPE (type))) | |
00e7d8a5 | 12925 | add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_col_major); |
12926 | ||
30ade641 | 12927 | #if 0 |
12928 | /* We default the array ordering. SDB will probably do | |
12929 | the right things even if DW_AT_ordering is not present. It's not even | |
12930 | an issue until we start to get into multidimensional arrays anyway. If | |
12931 | SDB is ever caught doing the Wrong Thing for multi-dimensional arrays, | |
12932 | then we'll have to put the DW_AT_ordering attribute back in. (But if | |
12933 | and when we find out that we need to put these in, we will only do so | |
12934 | for multidimensional arrays. */ | |
12935 | add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_row_major); | |
12936 | #endif | |
12937 | ||
5b67860b | 12938 | #ifdef MIPS_DEBUGGING_INFO |
cc324702 | 12939 | /* The SGI compilers handle arrays of unknown bound by setting |
12940 | AT_declaration and not emitting any subrange DIEs. */ | |
5b67860b | 12941 | if (! TYPE_DOMAIN (type)) |
8c50ec6a | 12942 | add_AT_flag (array_die, DW_AT_declaration, 1); |
5b67860b | 12943 | else |
12944 | #endif | |
544cd34c | 12945 | add_subscript_info (array_die, type, collapse_nested_arrays); |
30ade641 | 12946 | |
544cd34c | 12947 | /* Add representation of the type of the elements of this array type and |
12948 | emit the corresponding DIE if we haven't done it already. */ | |
30ade641 | 12949 | element_type = TREE_TYPE (type); |
544cd34c | 12950 | if (collapse_nested_arrays) |
12951 | while (TREE_CODE (element_type) == ARRAY_TYPE) | |
cdba1d8f | 12952 | { |
12953 | if (TYPE_STRING_FLAG (element_type) && is_fortran ()) | |
12954 | break; | |
12955 | element_type = TREE_TYPE (element_type); | |
12956 | } | |
12957 | ||
30ade641 | 12958 | #ifndef MIPS_DEBUGGING_INFO |
30ade641 | 12959 | gen_type_die (element_type, context_die); |
5b67860b | 12960 | #endif |
30ade641 | 12961 | |
12962 | add_type_attribute (array_die, element_type, 0, 0, context_die); | |
af84796a | 12963 | |
12964 | if (get_AT (array_die, DW_AT_name)) | |
12965 | add_pubtype (type, array_die); | |
30ade641 | 12966 | } |
12967 | ||
1c79cc8c | 12968 | static dw_loc_descr_ref |
12969 | descr_info_loc (tree val, tree base_decl) | |
12970 | { | |
12971 | HOST_WIDE_INT size; | |
12972 | dw_loc_descr_ref loc, loc2; | |
12973 | enum dwarf_location_atom op; | |
12974 | ||
12975 | if (val == base_decl) | |
12976 | return new_loc_descr (DW_OP_push_object_address, 0, 0); | |
12977 | ||
12978 | switch (TREE_CODE (val)) | |
12979 | { | |
72dd6141 | 12980 | CASE_CONVERT: |
1c79cc8c | 12981 | return descr_info_loc (TREE_OPERAND (val, 0), base_decl); |
6180d82a | 12982 | case VAR_DECL: |
12983 | return loc_descriptor_from_tree_1 (val, 0); | |
1c79cc8c | 12984 | case INTEGER_CST: |
12985 | if (host_integerp (val, 0)) | |
12986 | return int_loc_descriptor (tree_low_cst (val, 0)); | |
12987 | break; | |
12988 | case INDIRECT_REF: | |
12989 | size = int_size_in_bytes (TREE_TYPE (val)); | |
12990 | if (size < 0) | |
12991 | break; | |
12992 | loc = descr_info_loc (TREE_OPERAND (val, 0), base_decl); | |
12993 | if (!loc) | |
12994 | break; | |
12995 | if (size == DWARF2_ADDR_SIZE) | |
12996 | add_loc_descr (&loc, new_loc_descr (DW_OP_deref, 0, 0)); | |
12997 | else | |
12998 | add_loc_descr (&loc, new_loc_descr (DW_OP_deref_size, size, 0)); | |
12999 | return loc; | |
13000 | case POINTER_PLUS_EXPR: | |
13001 | case PLUS_EXPR: | |
13002 | if (host_integerp (TREE_OPERAND (val, 1), 1) | |
13003 | && (unsigned HOST_WIDE_INT) tree_low_cst (TREE_OPERAND (val, 1), 1) | |
13004 | < 16384) | |
13005 | { | |
13006 | loc = descr_info_loc (TREE_OPERAND (val, 0), base_decl); | |
13007 | if (!loc) | |
13008 | break; | |
1938132c | 13009 | loc_descr_plus_const (&loc, tree_low_cst (TREE_OPERAND (val, 1), 0)); |
1c79cc8c | 13010 | } |
13011 | else | |
13012 | { | |
13013 | op = DW_OP_plus; | |
13014 | do_binop: | |
13015 | loc = descr_info_loc (TREE_OPERAND (val, 0), base_decl); | |
13016 | if (!loc) | |
13017 | break; | |
13018 | loc2 = descr_info_loc (TREE_OPERAND (val, 1), base_decl); | |
13019 | if (!loc2) | |
13020 | break; | |
13021 | add_loc_descr (&loc, loc2); | |
13022 | add_loc_descr (&loc2, new_loc_descr (op, 0, 0)); | |
13023 | } | |
13024 | return loc; | |
13025 | case MINUS_EXPR: | |
13026 | op = DW_OP_minus; | |
13027 | goto do_binop; | |
13028 | case MULT_EXPR: | |
13029 | op = DW_OP_mul; | |
13030 | goto do_binop; | |
13031 | case EQ_EXPR: | |
13032 | op = DW_OP_eq; | |
13033 | goto do_binop; | |
13034 | case NE_EXPR: | |
13035 | op = DW_OP_ne; | |
13036 | goto do_binop; | |
13037 | default: | |
13038 | break; | |
13039 | } | |
13040 | return NULL; | |
13041 | } | |
13042 | ||
13043 | static void | |
13044 | add_descr_info_field (dw_die_ref die, enum dwarf_attribute attr, | |
13045 | tree val, tree base_decl) | |
13046 | { | |
13047 | dw_loc_descr_ref loc; | |
13048 | ||
13049 | if (host_integerp (val, 0)) | |
13050 | { | |
13051 | add_AT_unsigned (die, attr, tree_low_cst (val, 0)); | |
13052 | return; | |
13053 | } | |
13054 | ||
13055 | loc = descr_info_loc (val, base_decl); | |
13056 | if (!loc) | |
13057 | return; | |
13058 | ||
13059 | add_AT_loc (die, attr, loc); | |
13060 | } | |
13061 | ||
13062 | /* This routine generates DIE for array with hidden descriptor, details | |
13063 | are filled into *info by a langhook. */ | |
13064 | ||
13065 | static void | |
13066 | gen_descr_array_type_die (tree type, struct array_descr_info *info, | |
13067 | dw_die_ref context_die) | |
13068 | { | |
13069 | dw_die_ref scope_die = scope_die_for (type, context_die); | |
13070 | dw_die_ref array_die; | |
13071 | int dim; | |
13072 | ||
13073 | array_die = new_die (DW_TAG_array_type, scope_die, type); | |
13074 | add_name_attribute (array_die, type_tag (type)); | |
13075 | equate_type_number_to_die (type, array_die); | |
13076 | ||
00e7d8a5 | 13077 | /* For Fortran multidimensional arrays use DW_ORD_col_major ordering. */ |
13078 | if (is_fortran () | |
13079 | && info->ndimensions >= 2) | |
13080 | add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_col_major); | |
13081 | ||
1c79cc8c | 13082 | if (info->data_location) |
13083 | add_descr_info_field (array_die, DW_AT_data_location, info->data_location, | |
13084 | info->base_decl); | |
13085 | if (info->associated) | |
13086 | add_descr_info_field (array_die, DW_AT_associated, info->associated, | |
13087 | info->base_decl); | |
13088 | if (info->allocated) | |
13089 | add_descr_info_field (array_die, DW_AT_allocated, info->allocated, | |
13090 | info->base_decl); | |
13091 | ||
13092 | for (dim = 0; dim < info->ndimensions; dim++) | |
13093 | { | |
13094 | dw_die_ref subrange_die | |
13095 | = new_die (DW_TAG_subrange_type, array_die, NULL); | |
13096 | ||
13097 | if (info->dimen[dim].lower_bound) | |
13098 | { | |
13099 | /* If it is the default value, omit it. */ | |
13100 | if ((is_c_family () || is_java ()) | |
13101 | && integer_zerop (info->dimen[dim].lower_bound)) | |
13102 | ; | |
13103 | else if (is_fortran () | |
13104 | && integer_onep (info->dimen[dim].lower_bound)) | |
13105 | ; | |
13106 | else | |
13107 | add_descr_info_field (subrange_die, DW_AT_lower_bound, | |
13108 | info->dimen[dim].lower_bound, | |
13109 | info->base_decl); | |
13110 | } | |
13111 | if (info->dimen[dim].upper_bound) | |
13112 | add_descr_info_field (subrange_die, DW_AT_upper_bound, | |
13113 | info->dimen[dim].upper_bound, | |
13114 | info->base_decl); | |
13115 | if (info->dimen[dim].stride) | |
13116 | add_descr_info_field (subrange_die, DW_AT_byte_stride, | |
13117 | info->dimen[dim].stride, | |
13118 | info->base_decl); | |
13119 | } | |
13120 | ||
13121 | gen_type_die (info->element_type, context_die); | |
13122 | add_type_attribute (array_die, info->element_type, 0, 0, context_die); | |
13123 | ||
13124 | if (get_AT (array_die, DW_AT_name)) | |
13125 | add_pubtype (type, array_die); | |
13126 | } | |
13127 | ||
cd03a192 | 13128 | #if 0 |
30ade641 | 13129 | static void |
8ec3a57b | 13130 | gen_entry_point_die (tree decl, dw_die_ref context_die) |
30ade641 | 13131 | { |
19cb6b50 | 13132 | tree origin = decl_ultimate_origin (decl); |
15cfae4e | 13133 | dw_die_ref decl_die = new_die (DW_TAG_entry_point, context_die, decl); |
8c3f468d | 13134 | |
30ade641 | 13135 | if (origin != NULL) |
ec1e49cc | 13136 | add_abstract_origin_attribute (decl_die, origin); |
30ade641 | 13137 | else |
13138 | { | |
13139 | add_name_and_src_coords_attributes (decl_die, decl); | |
30ade641 | 13140 | add_type_attribute (decl_die, TREE_TYPE (TREE_TYPE (decl)), |
13141 | 0, 0, context_die); | |
13142 | } | |
ec1e49cc | 13143 | |
30ade641 | 13144 | if (DECL_ABSTRACT (decl)) |
ec1e49cc | 13145 | equate_decl_number_to_die (decl, decl_die); |
30ade641 | 13146 | else |
ec1e49cc | 13147 | add_AT_lbl_id (decl_die, DW_AT_low_pc, decl_start_label (decl)); |
30ade641 | 13148 | } |
cd03a192 | 13149 | #endif |
30ade641 | 13150 | |
a4617d03 | 13151 | /* Walk through the list of incomplete types again, trying once more to |
13152 | emit full debugging info for them. */ | |
13153 | ||
13154 | static void | |
8ec3a57b | 13155 | retry_incomplete_types (void) |
a4617d03 | 13156 | { |
52a7cc7b | 13157 | int i; |
8c3f468d | 13158 | |
22230dd1 | 13159 | for (i = VEC_length (tree, incomplete_types) - 1; i >= 0; i--) |
13160 | gen_type_die (VEC_index (tree, incomplete_types, i), comp_unit_die); | |
a4617d03 | 13161 | } |
13162 | ||
03a61d93 | 13163 | /* Determine what tag to use for a record type. */ |
13164 | ||
13165 | static enum dwarf_tag | |
13166 | record_type_tag (tree type) | |
13167 | { | |
13168 | if (! lang_hooks.types.classify_record) | |
13169 | return DW_TAG_structure_type; | |
13170 | ||
13171 | switch (lang_hooks.types.classify_record (type)) | |
13172 | { | |
13173 | case RECORD_IS_STRUCT: | |
13174 | return DW_TAG_structure_type; | |
13175 | ||
13176 | case RECORD_IS_CLASS: | |
13177 | return DW_TAG_class_type; | |
13178 | ||
13179 | case RECORD_IS_INTERFACE: | |
13180 | return DW_TAG_interface_type; | |
13181 | ||
13182 | default: | |
13183 | gcc_unreachable (); | |
13184 | } | |
13185 | } | |
13186 | ||
30ade641 | 13187 | /* Generate a DIE to represent an enumeration type. Note that these DIEs |
13188 | include all of the information about the enumeration values also. Each | |
6542a017 | 13189 | enumerated type name/value is listed as a child of the enumerated type |
13190 | DIE. */ | |
ec1e49cc | 13191 | |
93c7db82 | 13192 | static dw_die_ref |
8ec3a57b | 13193 | gen_enumeration_type_die (tree type, dw_die_ref context_die) |
30ade641 | 13194 | { |
19cb6b50 | 13195 | dw_die_ref type_die = lookup_type_die (type); |
6542a017 | 13196 | |
30ade641 | 13197 | if (type_die == NULL) |
13198 | { | |
13199 | type_die = new_die (DW_TAG_enumeration_type, | |
15cfae4e | 13200 | scope_die_for (type, context_die), type); |
30ade641 | 13201 | equate_type_number_to_die (type, type_die); |
13202 | add_name_attribute (type_die, type_tag (type)); | |
30ade641 | 13203 | } |
6542a017 | 13204 | else if (! TYPE_SIZE (type)) |
93c7db82 | 13205 | return type_die; |
6542a017 | 13206 | else |
13207 | remove_AT (type_die, DW_AT_declaration); | |
13208 | ||
13209 | /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the | |
13210 | given enum type is incomplete, do not generate the DW_AT_byte_size | |
13211 | attribute or the DW_AT_element_list attribute. */ | |
13212 | if (TYPE_SIZE (type)) | |
30ade641 | 13213 | { |
19cb6b50 | 13214 | tree link; |
ec1e49cc | 13215 | |
a3377a8b | 13216 | TREE_ASM_WRITTEN (type) = 1; |
6542a017 | 13217 | add_byte_size_attribute (type_die, type); |
0dbd1c74 | 13218 | if (TYPE_STUB_DECL (type) != NULL_TREE) |
840b696a | 13219 | add_src_coords_attributes (type_die, TYPE_STUB_DECL (type)); |
ec1e49cc | 13220 | |
678d90bb | 13221 | /* If the first reference to this type was as the return type of an |
13222 | inline function, then it may not have a parent. Fix this now. */ | |
13223 | if (type_die->die_parent == NULL) | |
13224 | add_child_die (scope_die_for (type, context_die), type_die); | |
13225 | ||
82bb2115 | 13226 | for (link = TYPE_VALUES (type); |
6542a017 | 13227 | link != NULL; link = TREE_CHAIN (link)) |
30ade641 | 13228 | { |
15cfae4e | 13229 | dw_die_ref enum_die = new_die (DW_TAG_enumerator, type_die, link); |
99f3dd6a | 13230 | tree value = TREE_VALUE (link); |
ec1e49cc | 13231 | |
6542a017 | 13232 | add_name_attribute (enum_die, |
13233 | IDENTIFIER_POINTER (TREE_PURPOSE (link))); | |
5d844ba2 | 13234 | |
dbc4ace1 | 13235 | if (TREE_CODE (value) == CONST_DECL) |
13236 | value = DECL_INITIAL (value); | |
13237 | ||
78a8ed03 | 13238 | if (host_integerp (value, TYPE_UNSIGNED (TREE_TYPE (value)))) |
99f3dd6a | 13239 | /* DWARF2 does not provide a way of indicating whether or |
13240 | not enumeration constants are signed or unsigned. GDB | |
13241 | always assumes the values are signed, so we output all | |
13242 | values as if they were signed. That means that | |
13243 | enumeration constants with very large unsigned values | |
13244 | will appear to have negative values in the debugger. */ | |
13245 | add_AT_int (enum_die, DW_AT_const_value, | |
13246 | tree_low_cst (value, tree_int_cst_sgn (value) > 0)); | |
30ade641 | 13247 | } |
13248 | } | |
6542a017 | 13249 | else |
13250 | add_AT_flag (type_die, DW_AT_declaration, 1); | |
93c7db82 | 13251 | |
af84796a | 13252 | if (get_AT (type_die, DW_AT_name)) |
13253 | add_pubtype (type, type_die); | |
13254 | ||
93c7db82 | 13255 | return type_die; |
30ade641 | 13256 | } |
13257 | ||
30ade641 | 13258 | /* Generate a DIE to represent either a real live formal parameter decl or to |
13259 | represent just the type of some formal parameter position in some function | |
13260 | type. | |
ec1e49cc | 13261 | |
30ade641 | 13262 | Note that this routine is a bit unusual because its argument may be a |
13263 | ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which | |
13264 | represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE | |
13265 | node. If it's the former then this function is being called to output a | |
13266 | DIE to represent a formal parameter object (or some inlining thereof). If | |
13267 | it's the latter, then this function is only being called to output a | |
13268 | DW_TAG_formal_parameter DIE to stand as a placeholder for some formal | |
13269 | argument type of some subprogram type. */ | |
ec1e49cc | 13270 | |
6efd403b | 13271 | static dw_die_ref |
4b5d70fd | 13272 | gen_formal_parameter_die (tree node, tree origin, dw_die_ref context_die) |
30ade641 | 13273 | { |
4b5d70fd | 13274 | tree node_or_origin = node ? node : origin; |
19cb6b50 | 13275 | dw_die_ref parm_die |
15cfae4e | 13276 | = new_die (DW_TAG_formal_parameter, context_die, node); |
ec1e49cc | 13277 | |
4b5d70fd | 13278 | switch (TREE_CODE_CLASS (TREE_CODE (node_or_origin))) |
30ade641 | 13279 | { |
ce45a448 | 13280 | case tcc_declaration: |
4b5d70fd | 13281 | if (!origin) |
13282 | origin = decl_ultimate_origin (node); | |
30ade641 | 13283 | if (origin != NULL) |
6efd403b | 13284 | add_abstract_origin_attribute (parm_die, origin); |
30ade641 | 13285 | else |
13286 | { | |
73bcd2ba | 13287 | tree type = TREE_TYPE (node); |
30ade641 | 13288 | add_name_and_src_coords_attributes (parm_die, node); |
73bcd2ba | 13289 | if (DECL_BY_REFERENCE (node)) |
1a3ef8f6 | 13290 | add_type_attribute (parm_die, TREE_TYPE (type), 0, 0, |
13291 | context_die); | |
13292 | else | |
13293 | add_type_attribute (parm_die, type, | |
13294 | TREE_READONLY (node), | |
13295 | TREE_THIS_VOLATILE (node), | |
13296 | context_die); | |
6ed29fb8 | 13297 | if (DECL_ARTIFICIAL (node)) |
13298 | add_AT_flag (parm_die, DW_AT_artificial, 1); | |
30ade641 | 13299 | } |
ec1e49cc | 13300 | |
4b5d70fd | 13301 | if (node) |
13302 | equate_decl_number_to_die (node, parm_die); | |
13303 | if (! DECL_ABSTRACT (node_or_origin)) | |
13304 | add_location_or_const_value_attribute (parm_die, node_or_origin, | |
13305 | DW_AT_location); | |
ec1e49cc | 13306 | |
30ade641 | 13307 | break; |
13308 | ||
ce45a448 | 13309 | case tcc_type: |
ec1e49cc | 13310 | /* We were called with some kind of a ..._TYPE node. */ |
4b5d70fd | 13311 | add_type_attribute (parm_die, node_or_origin, 0, 0, context_die); |
30ade641 | 13312 | break; |
13313 | ||
30ade641 | 13314 | default: |
7bd4f6b6 | 13315 | gcc_unreachable (); |
30ade641 | 13316 | } |
ec1e49cc | 13317 | |
6efd403b | 13318 | return parm_die; |
30ade641 | 13319 | } |
13320 | ||
13321 | /* Generate a special type of DIE used as a stand-in for a trailing ellipsis | |
13322 | at the end of an (ANSI prototyped) formal parameters list. */ | |
ec1e49cc | 13323 | |
30ade641 | 13324 | static void |
8ec3a57b | 13325 | gen_unspecified_parameters_die (tree decl_or_type, dw_die_ref context_die) |
30ade641 | 13326 | { |
15cfae4e | 13327 | new_die (DW_TAG_unspecified_parameters, context_die, decl_or_type); |
30ade641 | 13328 | } |
13329 | ||
13330 | /* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a | |
13331 | DW_TAG_unspecified_parameters DIE) to represent the types of the formal | |
13332 | parameters as specified in some function type specification (except for | |
0dbc398a | 13333 | those which appear as part of a function *definition*). */ |
ec1e49cc | 13334 | |
30ade641 | 13335 | static void |
8ec3a57b | 13336 | gen_formal_types_die (tree function_or_method_type, dw_die_ref context_die) |
30ade641 | 13337 | { |
19cb6b50 | 13338 | tree link; |
13339 | tree formal_type = NULL; | |
13340 | tree first_parm_type; | |
8f80e66d | 13341 | tree arg; |
30ade641 | 13342 | |
8f80e66d | 13343 | if (TREE_CODE (function_or_method_type) == FUNCTION_DECL) |
13344 | { | |
13345 | arg = DECL_ARGUMENTS (function_or_method_type); | |
13346 | function_or_method_type = TREE_TYPE (function_or_method_type); | |
13347 | } | |
13348 | else | |
13349 | arg = NULL_TREE; | |
bc70bd5e | 13350 | |
8f80e66d | 13351 | first_parm_type = TYPE_ARG_TYPES (function_or_method_type); |
30ade641 | 13352 | |
f80d1bcd | 13353 | /* Make our first pass over the list of formal parameter types and output a |
30ade641 | 13354 | DW_TAG_formal_parameter DIE for each one. */ |
8f80e66d | 13355 | for (link = first_parm_type; link; ) |
30ade641 | 13356 | { |
19cb6b50 | 13357 | dw_die_ref parm_die; |
f80d1bcd | 13358 | |
30ade641 | 13359 | formal_type = TREE_VALUE (link); |
13360 | if (formal_type == void_type_node) | |
13361 | break; | |
13362 | ||
13363 | /* Output a (nameless) DIE to represent the formal parameter itself. */ | |
4b5d70fd | 13364 | parm_die = gen_formal_parameter_die (formal_type, NULL, context_die); |
8f80e66d | 13365 | if ((TREE_CODE (function_or_method_type) == METHOD_TYPE |
13366 | && link == first_parm_type) | |
13367 | || (arg && DECL_ARTIFICIAL (arg))) | |
6efd403b | 13368 | add_AT_flag (parm_die, DW_AT_artificial, 1); |
8f80e66d | 13369 | |
13370 | link = TREE_CHAIN (link); | |
13371 | if (arg) | |
13372 | arg = TREE_CHAIN (arg); | |
30ade641 | 13373 | } |
13374 | ||
13375 | /* If this function type has an ellipsis, add a | |
13376 | DW_TAG_unspecified_parameters DIE to the end of the parameter list. */ | |
13377 | if (formal_type != void_type_node) | |
13378 | gen_unspecified_parameters_die (function_or_method_type, context_die); | |
13379 | ||
f80d1bcd | 13380 | /* Make our second (and final) pass over the list of formal parameter types |
30ade641 | 13381 | and output DIEs to represent those types (as necessary). */ |
13382 | for (link = TYPE_ARG_TYPES (function_or_method_type); | |
8c3f468d | 13383 | link && TREE_VALUE (link); |
30ade641 | 13384 | link = TREE_CHAIN (link)) |
8c3f468d | 13385 | gen_type_die (TREE_VALUE (link), context_die); |
30ade641 | 13386 | } |
13387 | ||
e7b3c55c | 13388 | /* We want to generate the DIE for TYPE so that we can generate the |
13389 | die for MEMBER, which has been defined; we will need to refer back | |
13390 | to the member declaration nested within TYPE. If we're trying to | |
13391 | generate minimal debug info for TYPE, processing TYPE won't do the | |
13392 | trick; we need to attach the member declaration by hand. */ | |
13393 | ||
13394 | static void | |
8ec3a57b | 13395 | gen_type_die_for_member (tree type, tree member, dw_die_ref context_die) |
e7b3c55c | 13396 | { |
13397 | gen_type_die (type, context_die); | |
13398 | ||
13399 | /* If we're trying to avoid duplicate debug info, we may not have | |
13400 | emitted the member decl for this function. Emit it now. */ | |
13401 | if (TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type)) | |
13402 | && ! lookup_decl_die (member)) | |
13403 | { | |
d4946992 | 13404 | dw_die_ref type_die; |
7bd4f6b6 | 13405 | gcc_assert (!decl_ultimate_origin (member)); |
e7b3c55c | 13406 | |
13407 | push_decl_scope (type); | |
d4946992 | 13408 | type_die = lookup_type_die (type); |
e7b3c55c | 13409 | if (TREE_CODE (member) == FUNCTION_DECL) |
d4946992 | 13410 | gen_subprogram_die (member, type_die); |
13411 | else if (TREE_CODE (member) == FIELD_DECL) | |
13412 | { | |
13413 | /* Ignore the nameless fields that are used to skip bits but handle | |
13414 | C++ anonymous unions and structs. */ | |
13415 | if (DECL_NAME (member) != NULL_TREE | |
13416 | || TREE_CODE (TREE_TYPE (member)) == UNION_TYPE | |
13417 | || TREE_CODE (TREE_TYPE (member)) == RECORD_TYPE) | |
13418 | { | |
13419 | gen_type_die (member_declared_type (member), type_die); | |
13420 | gen_field_die (member, type_die); | |
13421 | } | |
13422 | } | |
e7b3c55c | 13423 | else |
4b5d70fd | 13424 | gen_variable_die (member, NULL_TREE, type_die); |
8c3f468d | 13425 | |
e7b3c55c | 13426 | pop_decl_scope (); |
13427 | } | |
13428 | } | |
13429 | ||
8c3f468d | 13430 | /* Generate the DWARF2 info for the "abstract" instance of a function which we |
13431 | may later generate inlined and/or out-of-line instances of. */ | |
e7b3c55c | 13432 | |
b29760a8 | 13433 | static void |
8ec3a57b | 13434 | dwarf2out_abstract_function (tree decl) |
e7b3c55c | 13435 | { |
19cb6b50 | 13436 | dw_die_ref old_die; |
14b40abb | 13437 | tree save_fn; |
8f80e66d | 13438 | tree context; |
13439 | int was_abstract = DECL_ABSTRACT (decl); | |
13440 | ||
13441 | /* Make sure we have the actual abstract inline, not a clone. */ | |
13442 | decl = DECL_ORIGIN (decl); | |
e7b3c55c | 13443 | |
bc70bd5e | 13444 | old_die = lookup_decl_die (decl); |
2e14ce2e | 13445 | if (old_die && get_AT (old_die, DW_AT_inline)) |
e7b3c55c | 13446 | /* We've already generated the abstract instance. */ |
13447 | return; | |
13448 | ||
8f80e66d | 13449 | /* Be sure we've emitted the in-class declaration DIE (if any) first, so |
13450 | we don't get confused by DECL_ABSTRACT. */ | |
0c88fb4f | 13451 | if (debug_info_level > DINFO_LEVEL_TERSE) |
13452 | { | |
13453 | context = decl_class_context (decl); | |
13454 | if (context) | |
13455 | gen_type_die_for_member | |
13456 | (context, decl, decl_function_context (decl) ? NULL : comp_unit_die); | |
13457 | } | |
bc70bd5e | 13458 | |
8f80e66d | 13459 | /* Pretend we've just finished compiling this function. */ |
14b40abb | 13460 | save_fn = current_function_decl; |
13461 | current_function_decl = decl; | |
87d4aa85 | 13462 | push_cfun (DECL_STRUCT_FUNCTION (decl)); |
14b40abb | 13463 | |
e7b3c55c | 13464 | set_decl_abstract_flags (decl, 1); |
13465 | dwarf2out_decl (decl); | |
8f80e66d | 13466 | if (! was_abstract) |
13467 | set_decl_abstract_flags (decl, 0); | |
14b40abb | 13468 | |
13469 | current_function_decl = save_fn; | |
87d4aa85 | 13470 | pop_cfun (); |
e7b3c55c | 13471 | } |
13472 | ||
f6e59711 | 13473 | /* Helper function of premark_used_types() which gets called through |
13474 | htab_traverse_resize(). | |
13475 | ||
13476 | Marks the DIE of a given type in *SLOT as perennial, so it never gets | |
13477 | marked as unused by prune_unused_types. */ | |
13478 | static int | |
13479 | premark_used_types_helper (void **slot, void *data ATTRIBUTE_UNUSED) | |
13480 | { | |
13481 | tree type; | |
13482 | dw_die_ref die; | |
13483 | ||
2457c754 | 13484 | type = (tree) *slot; |
f6e59711 | 13485 | die = lookup_type_die (type); |
13486 | if (die != NULL) | |
13487 | die->die_perennial_p = 1; | |
13488 | return 1; | |
13489 | } | |
13490 | ||
13491 | /* Mark all members of used_types_hash as perennial. */ | |
13492 | static void | |
13493 | premark_used_types (void) | |
13494 | { | |
13495 | if (cfun && cfun->used_types_hash) | |
13496 | htab_traverse (cfun->used_types_hash, premark_used_types_helper, NULL); | |
13497 | } | |
13498 | ||
30ade641 | 13499 | /* Generate a DIE to represent a declared function (either file-scope or |
13500 | block-local). */ | |
ec1e49cc | 13501 | |
30ade641 | 13502 | static void |
8ec3a57b | 13503 | gen_subprogram_die (tree decl, dw_die_ref context_die) |
30ade641 | 13504 | { |
13505 | char label_id[MAX_ARTIFICIAL_LABEL_BYTES]; | |
19cb6b50 | 13506 | tree origin = decl_ultimate_origin (decl); |
13507 | dw_die_ref subr_die; | |
19cb6b50 | 13508 | tree fn_arg_types; |
13509 | tree outer_scope; | |
13510 | dw_die_ref old_die = lookup_decl_die (decl); | |
13511 | int declaration = (current_function_decl != decl | |
e89530cd | 13512 | || class_or_namespace_scope_p (context_die)); |
30ade641 | 13513 | |
89c30811 | 13514 | premark_used_types (); |
f6e59711 | 13515 | |
8c3f468d | 13516 | /* It is possible to have both DECL_ABSTRACT and DECLARATION be true if we |
13517 | started to generate the abstract instance of an inline, decided to output | |
13518 | its containing class, and proceeded to emit the declaration of the inline | |
13519 | from the member list for the class. If so, DECLARATION takes priority; | |
13520 | we'll get back to the abstract instance when done with the class. */ | |
e7b3c55c | 13521 | |
0dbc398a | 13522 | /* The class-scope declaration DIE must be the primary DIE. */ |
e89530cd | 13523 | if (origin && declaration && class_or_namespace_scope_p (context_die)) |
0dbc398a | 13524 | { |
13525 | origin = NULL; | |
7bd4f6b6 | 13526 | gcc_assert (!old_die); |
0dbc398a | 13527 | } |
13528 | ||
dcfa82ba | 13529 | /* Now that the C++ front end lazily declares artificial member fns, we |
13530 | might need to retrofit the declaration into its class. */ | |
13531 | if (!declaration && !origin && !old_die | |
13532 | && DECL_CONTEXT (decl) && TYPE_P (DECL_CONTEXT (decl)) | |
13533 | && !class_or_namespace_scope_p (context_die) | |
13534 | && debug_info_level > DINFO_LEVEL_TERSE) | |
13535 | old_die = force_decl_die (decl); | |
13536 | ||
30ade641 | 13537 | if (origin != NULL) |
13538 | { | |
7bd4f6b6 | 13539 | gcc_assert (!declaration || local_scope_p (context_die)); |
e7b3c55c | 13540 | |
48fdacd0 | 13541 | /* Fixup die_parent for the abstract instance of a nested |
13542 | inline function. */ | |
13543 | if (old_die && old_die->die_parent == NULL) | |
13544 | add_child_die (context_die, old_die); | |
13545 | ||
15cfae4e | 13546 | subr_die = new_die (DW_TAG_subprogram, context_die, decl); |
30ade641 | 13547 | add_abstract_origin_attribute (subr_die, origin); |
13548 | } | |
6ed29fb8 | 13549 | else if (old_die) |
13550 | { | |
7bd3dcc4 | 13551 | expanded_location s = expand_location (DECL_SOURCE_LOCATION (decl)); |
69278c24 | 13552 | struct dwarf_file_data * file_index = lookup_filename (s.file); |
6efd403b | 13553 | |
f414ade2 | 13554 | if (!get_AT_flag (old_die, DW_AT_declaration) |
13555 | /* We can have a normal definition following an inline one in the | |
13556 | case of redefinition of GNU C extern inlines. | |
13557 | It seems reasonable to use AT_specification in this case. */ | |
2e14ce2e | 13558 | && !get_AT (old_die, DW_AT_inline)) |
c2581433 | 13559 | { |
7c0a8197 | 13560 | /* Detect and ignore this case, where we are trying to output |
13561 | something we have already output. */ | |
7bd4f6b6 | 13562 | return; |
c2581433 | 13563 | } |
752e49ca | 13564 | |
13565 | /* If the definition comes from the same place as the declaration, | |
6efd403b | 13566 | maybe use the old DIE. We always want the DIE for this function |
13567 | that has the *_pc attributes to be under comp_unit_die so the | |
a7678b15 | 13568 | debugger can find it. We also need to do this for abstract |
13569 | instances of inlines, since the spec requires the out-of-line copy | |
13570 | to have the same parent. For local class methods, this doesn't | |
13571 | apply; we just use the old DIE. */ | |
13572 | if ((old_die->die_parent == comp_unit_die || context_die == NULL) | |
c90bf86c | 13573 | && (DECL_ARTIFICIAL (decl) |
69278c24 | 13574 | || (get_AT_file (old_die, DW_AT_decl_file) == file_index |
c90bf86c | 13575 | && (get_AT_unsigned (old_die, DW_AT_decl_line) |
7bd3dcc4 | 13576 | == (unsigned) s.line)))) |
6ed29fb8 | 13577 | { |
752e49ca | 13578 | subr_die = old_die; |
13579 | ||
2b49746a | 13580 | /* Clear out the declaration attribute and the formal parameters. |
8ff30ff6 | 13581 | Do not remove all children, because it is possible that this |
2b49746a | 13582 | declaration die was forced using force_decl_die(). In such |
13583 | cases die that forced declaration die (e.g. TAG_imported_module) | |
13584 | is one of the children that we do not want to remove. */ | |
752e49ca | 13585 | remove_AT (subr_die, DW_AT_declaration); |
2b49746a | 13586 | remove_child_TAG (subr_die, DW_TAG_formal_parameter); |
752e49ca | 13587 | } |
13588 | else | |
13589 | { | |
15cfae4e | 13590 | subr_die = new_die (DW_TAG_subprogram, context_die, decl); |
023dc493 | 13591 | add_AT_specification (subr_die, old_die); |
69278c24 | 13592 | if (get_AT_file (old_die, DW_AT_decl_file) != file_index) |
13593 | add_AT_file (subr_die, DW_AT_decl_file, file_index); | |
13594 | if (get_AT_unsigned (old_die, DW_AT_decl_line) != (unsigned) s.line) | |
13595 | add_AT_unsigned (subr_die, DW_AT_decl_line, s.line); | |
6ed29fb8 | 13596 | } |
13597 | } | |
30ade641 | 13598 | else |
13599 | { | |
15cfae4e | 13600 | subr_die = new_die (DW_TAG_subprogram, context_die, decl); |
f80d1bcd | 13601 | |
6542a017 | 13602 | if (TREE_PUBLIC (decl)) |
13603 | add_AT_flag (subr_die, DW_AT_external, 1); | |
ec1e49cc | 13604 | |
30ade641 | 13605 | add_name_and_src_coords_attributes (subr_die, decl); |
43f116ae | 13606 | if (debug_info_level > DINFO_LEVEL_TERSE) |
13607 | { | |
8c3f468d | 13608 | add_prototyped_attribute (subr_die, TREE_TYPE (decl)); |
13609 | add_type_attribute (subr_die, TREE_TYPE (TREE_TYPE (decl)), | |
13610 | 0, 0, context_die); | |
43f116ae | 13611 | } |
ec1e49cc | 13612 | |
30ade641 | 13613 | add_pure_or_virtual_attribute (subr_die, decl); |
6542a017 | 13614 | if (DECL_ARTIFICIAL (decl)) |
13615 | add_AT_flag (subr_die, DW_AT_artificial, 1); | |
8c3f468d | 13616 | |
6efd403b | 13617 | if (TREE_PROTECTED (decl)) |
13618 | add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_protected); | |
13619 | else if (TREE_PRIVATE (decl)) | |
13620 | add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_private); | |
30ade641 | 13621 | } |
cc324702 | 13622 | |
6efd403b | 13623 | if (declaration) |
13624 | { | |
2e14ce2e | 13625 | if (!old_die || !get_AT (old_die, DW_AT_inline)) |
f414ade2 | 13626 | { |
13627 | add_AT_flag (subr_die, DW_AT_declaration, 1); | |
13628 | ||
cb3582e7 | 13629 | /* If this is an explicit function declaration then generate |
13630 | a DW_AT_explicit attribute. */ | |
13631 | if (lang_hooks.decls.function_decl_explicit_p (decl)) | |
13632 | add_AT_flag (subr_die, DW_AT_explicit, 1); | |
13633 | ||
f414ade2 | 13634 | /* The first time we see a member function, it is in the context of |
13635 | the class to which it belongs. We make sure of this by emitting | |
13636 | the class first. The next time is the definition, which is | |
8ff30ff6 | 13637 | handled above. The two may come from the same source text. |
2b49746a | 13638 | |
13639 | Note that force_decl_die() forces function declaration die. It is | |
13640 | later reused to represent definition. */ | |
dcfa82ba | 13641 | equate_decl_number_to_die (decl, subr_die); |
f414ade2 | 13642 | } |
6efd403b | 13643 | } |
13644 | else if (DECL_ABSTRACT (decl)) | |
30ade641 | 13645 | { |
5bd74231 | 13646 | if (DECL_DECLARED_INLINE_P (decl)) |
404ba76d | 13647 | { |
61a9389f | 13648 | if (cgraph_function_possibly_inlined_p (decl)) |
404ba76d | 13649 | add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_inlined); |
13650 | else | |
5bd74231 | 13651 | add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_not_inlined); |
404ba76d | 13652 | } |
404ba76d | 13653 | else |
5bd74231 | 13654 | { |
13655 | if (cgraph_function_possibly_inlined_p (decl)) | |
61a9389f | 13656 | add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_inlined); |
5bd74231 | 13657 | else |
61a9389f | 13658 | add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_not_inlined); |
5bd74231 | 13659 | } |
404ba76d | 13660 | |
1b16fc45 | 13661 | if (DECL_DECLARED_INLINE_P (decl) |
13662 | && lookup_attribute ("artificial", DECL_ATTRIBUTES (decl))) | |
13663 | add_AT_flag (subr_die, DW_AT_artificial, 1); | |
13664 | ||
30ade641 | 13665 | equate_decl_number_to_die (decl, subr_die); |
13666 | } | |
13667 | else if (!DECL_EXTERNAL (decl)) | |
13668 | { | |
89fa767a | 13669 | HOST_WIDE_INT cfa_fb_offset; |
13670 | ||
2e14ce2e | 13671 | if (!old_die || !get_AT (old_die, DW_AT_inline)) |
ca2cef7a | 13672 | equate_decl_number_to_die (decl, subr_die); |
ec1e49cc | 13673 | |
1897b881 | 13674 | if (!flag_reorder_blocks_and_partition) |
13675 | { | |
13676 | ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_BEGIN_LABEL, | |
13677 | current_function_funcdef_no); | |
13678 | add_AT_lbl_id (subr_die, DW_AT_low_pc, label_id); | |
13679 | ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL, | |
13680 | current_function_funcdef_no); | |
13681 | add_AT_lbl_id (subr_die, DW_AT_high_pc, label_id); | |
61a9389f | 13682 | |
1897b881 | 13683 | add_pubname (decl, subr_die); |
13684 | add_arange (decl, subr_die); | |
13685 | } | |
13686 | else | |
13687 | { /* Do nothing for now; maybe need to duplicate die, one for | |
f0b5f617 | 13688 | hot section and one for cold section, then use the hot/cold |
1897b881 | 13689 | section begin/end labels to generate the aranges... */ |
13690 | /* | |
13691 | add_AT_lbl_id (subr_die, DW_AT_low_pc, hot_section_label); | |
13692 | add_AT_lbl_id (subr_die, DW_AT_high_pc, hot_section_end_label); | |
13693 | add_AT_lbl_id (subr_die, DW_AT_lo_user, unlikely_section_label); | |
13694 | add_AT_lbl_id (subr_die, DW_AT_hi_user, cold_section_end_label); | |
13695 | ||
13696 | add_pubname (decl, subr_die); | |
13697 | add_arange (decl, subr_die); | |
13698 | add_arange (decl, subr_die); | |
13699 | */ | |
13700 | } | |
dc7a29ce | 13701 | |
30ade641 | 13702 | #ifdef MIPS_DEBUGGING_INFO |
30ade641 | 13703 | /* Add a reference to the FDE for this routine. */ |
13704 | add_AT_fde_ref (subr_die, DW_AT_MIPS_fde, current_funcdef_fde); | |
13705 | #endif | |
13706 | ||
89fa767a | 13707 | cfa_fb_offset = CFA_FRAME_BASE_OFFSET (decl); |
13708 | ||
12d886b8 | 13709 | /* We define the "frame base" as the function's CFA. This is more |
13710 | convenient for several reasons: (1) It's stable across the prologue | |
13711 | and epilogue, which makes it better than just a frame pointer, | |
13712 | (2) With dwarf3, there exists a one-byte encoding that allows us | |
13713 | to reference the .debug_frame data by proxy, but failing that, | |
13714 | (3) We can at least reuse the code inspection and interpretation | |
13715 | code that determines the CFA position at various points in the | |
13716 | function. */ | |
13717 | /* ??? Use some command-line or configury switch to enable the use | |
13718 | of dwarf3 DW_OP_call_frame_cfa. At present there are no dwarf | |
13719 | consumers that understand it; fall back to "pure" dwarf2 and | |
13720 | convert the CFA data into a location list. */ | |
13721 | { | |
89fa767a | 13722 | dw_loc_list_ref list = convert_cfa_to_fb_loc_list (cfa_fb_offset); |
12d886b8 | 13723 | if (list->dw_loc_next) |
13724 | add_AT_loc_list (subr_die, DW_AT_frame_base, list); | |
13725 | else | |
13726 | add_AT_loc (subr_die, DW_AT_frame_base, list->expr); | |
13727 | } | |
13728 | ||
13729 | /* Compute a displacement from the "steady-state frame pointer" to | |
13730 | the CFA. The former is what all stack slots and argument slots | |
61a9389f | 13731 | will reference in the rtl; the later is what we've told the |
12d886b8 | 13732 | debugger about. We'll need to adjust all frame_base references |
13733 | by this displacement. */ | |
89fa767a | 13734 | compute_frame_pointer_to_fb_displacement (cfa_fb_offset); |
30ade641 | 13735 | |
4ee9c684 | 13736 | if (cfun->static_chain_decl) |
678d90bb | 13737 | add_AT_location_description (subr_die, DW_AT_static_link, |
afcf285e | 13738 | loc_descriptor_from_tree (cfun->static_chain_decl)); |
30ade641 | 13739 | } |
13740 | ||
13741 | /* Now output descriptions of the arguments for this function. This gets | |
f80d1bcd | 13742 | (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list |
30ade641 | 13743 | for a FUNCTION_DECL doesn't indicate cases where there was a trailing |
13744 | `...' at the end of the formal parameter list. In order to find out if | |
13745 | there was a trailing ellipsis or not, we must instead look at the type | |
13746 | associated with the FUNCTION_DECL. This will be a node of type | |
13747 | FUNCTION_TYPE. If the chain of type nodes hanging off of this | |
f80d1bcd | 13748 | FUNCTION_TYPE node ends with a void_type_node then there should *not* be |
30ade641 | 13749 | an ellipsis at the end. */ |
ec1e49cc | 13750 | |
30ade641 | 13751 | /* In the case where we are describing a mere function declaration, all we |
f80d1bcd | 13752 | need to do here (and all we *can* do here) is to describe the *types* of |
30ade641 | 13753 | its formal parameters. */ |
43f116ae | 13754 | if (debug_info_level <= DINFO_LEVEL_TERSE) |
ec1e49cc | 13755 | ; |
cc324702 | 13756 | else if (declaration) |
8f80e66d | 13757 | gen_formal_types_die (decl, subr_die); |
30ade641 | 13758 | else |
13759 | { | |
2358393e | 13760 | /* Generate DIEs to represent all known formal parameters. */ |
19cb6b50 | 13761 | tree arg_decls = DECL_ARGUMENTS (decl); |
13762 | tree parm; | |
30ade641 | 13763 | |
13764 | /* When generating DIEs, generate the unspecified_parameters DIE | |
c83a163c | 13765 | instead if we come across the arg "__builtin_va_alist" */ |
30ade641 | 13766 | for (parm = arg_decls; parm; parm = TREE_CHAIN (parm)) |
ec1e49cc | 13767 | if (TREE_CODE (parm) == PARM_DECL) |
13768 | { | |
0bc644e0 | 13769 | if (DECL_NAME (parm) |
13770 | && !strcmp (IDENTIFIER_POINTER (DECL_NAME (parm)), | |
13771 | "__builtin_va_alist")) | |
ec1e49cc | 13772 | gen_unspecified_parameters_die (parm, subr_die); |
13773 | else | |
4b5d70fd | 13774 | gen_decl_die (parm, NULL, subr_die); |
ec1e49cc | 13775 | } |
30ade641 | 13776 | |
20dd417a | 13777 | /* Decide whether we need an unspecified_parameters DIE at the end. |
c83a163c | 13778 | There are 2 more cases to do this for: 1) the ansi ... declaration - |
13779 | this is detectable when the end of the arg list is not a | |
13780 | void_type_node 2) an unprototyped function declaration (not a | |
13781 | definition). This just means that we have no info about the | |
13782 | parameters at all. */ | |
30ade641 | 13783 | fn_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl)); |
ec1e49cc | 13784 | if (fn_arg_types != NULL) |
30ade641 | 13785 | { |
139c3f48 | 13786 | /* This is the prototyped case, check for.... */ |
30ade641 | 13787 | if (TREE_VALUE (tree_last (fn_arg_types)) != void_type_node) |
ec1e49cc | 13788 | gen_unspecified_parameters_die (decl, subr_die); |
30ade641 | 13789 | } |
ec1e49cc | 13790 | else if (DECL_INITIAL (decl) == NULL_TREE) |
13791 | gen_unspecified_parameters_die (decl, subr_die); | |
30ade641 | 13792 | } |
13793 | ||
13794 | /* Output Dwarf info for all of the stuff within the body of the function | |
13795 | (if it has one - it may be just a declaration). */ | |
13796 | outer_scope = DECL_INITIAL (decl); | |
13797 | ||
8c3f468d | 13798 | /* OUTER_SCOPE is a pointer to the outermost BLOCK node created to represent |
13799 | a function. This BLOCK actually represents the outermost binding contour | |
13800 | for the function, i.e. the contour in which the function's formal | |
13801 | parameters and labels get declared. Curiously, it appears that the front | |
13802 | end doesn't actually put the PARM_DECL nodes for the current function onto | |
13803 | the BLOCK_VARS list for this outer scope, but are strung off of the | |
13804 | DECL_ARGUMENTS list for the function instead. | |
13805 | ||
13806 | The BLOCK_VARS list for the `outer_scope' does provide us with a list of | |
13807 | the LABEL_DECL nodes for the function however, and we output DWARF info | |
13808 | for those in decls_for_scope. Just within the `outer_scope' there will be | |
13809 | a BLOCK node representing the function's outermost pair of curly braces, | |
13810 | and any blocks used for the base and member initializers of a C++ | |
cb371216 | 13811 | constructor function. */ |
cc324702 | 13812 | if (! declaration && TREE_CODE (outer_scope) != ERROR_MARK) |
a3899bb7 | 13813 | { |
4ee9c684 | 13814 | /* Emit a DW_TAG_variable DIE for a named return value. */ |
13815 | if (DECL_NAME (DECL_RESULT (decl))) | |
4b5d70fd | 13816 | gen_decl_die (DECL_RESULT (decl), NULL, subr_die); |
4ee9c684 | 13817 | |
a3899bb7 | 13818 | current_function_has_inlines = 0; |
13819 | decls_for_scope (outer_scope, subr_die, 0); | |
ec1e49cc | 13820 | |
0680318b | 13821 | #if 0 && defined (MIPS_DEBUGGING_INFO) |
a3899bb7 | 13822 | if (current_function_has_inlines) |
13823 | { | |
13824 | add_AT_flag (subr_die, DW_AT_MIPS_has_inlines, 1); | |
13825 | if (! comp_unit_has_inlines) | |
13826 | { | |
13827 | add_AT_flag (comp_unit_die, DW_AT_MIPS_has_inlines, 1); | |
13828 | comp_unit_has_inlines = 1; | |
13829 | } | |
13830 | } | |
13831 | #endif | |
13832 | } | |
a4b48f01 | 13833 | /* Add the calling convention attribute if requested. */ |
7d022cbc | 13834 | add_calling_convention_attribute (subr_die, decl); |
a4b48f01 | 13835 | |
30ade641 | 13836 | } |
13837 | ||
bbc59868 | 13838 | /* Returns a hash value for X (which really is a die_struct). */ |
13839 | ||
13840 | static hashval_t | |
13841 | common_block_die_table_hash (const void *x) | |
13842 | { | |
13843 | const_dw_die_ref d = (const_dw_die_ref) x; | |
13844 | return (hashval_t) d->decl_id ^ htab_hash_pointer (d->die_parent); | |
13845 | } | |
13846 | ||
13847 | /* Return nonzero if decl_id and die_parent of die_struct X is the same | |
13848 | as decl_id and die_parent of die_struct Y. */ | |
13849 | ||
13850 | static int | |
13851 | common_block_die_table_eq (const void *x, const void *y) | |
13852 | { | |
13853 | const_dw_die_ref d = (const_dw_die_ref) x; | |
13854 | const_dw_die_ref e = (const_dw_die_ref) y; | |
13855 | return d->decl_id == e->decl_id && d->die_parent == e->die_parent; | |
13856 | } | |
13857 | ||
4b5d70fd | 13858 | /* Generate a DIE to represent a declared data object. |
13859 | Either DECL or ORIGIN must be non-null. */ | |
ec1e49cc | 13860 | |
30ade641 | 13861 | static void |
4b5d70fd | 13862 | gen_variable_die (tree decl, tree origin, dw_die_ref context_die) |
30ade641 | 13863 | { |
a12691f0 | 13864 | HOST_WIDE_INT off; |
845c3089 | 13865 | tree com_decl; |
4b5d70fd | 13866 | tree decl_or_origin = decl ? decl : origin; |
a12691f0 | 13867 | dw_die_ref var_die; |
4b5d70fd | 13868 | dw_die_ref old_die = decl ? lookup_decl_die (decl) : NULL; |
ebcb0478 | 13869 | dw_die_ref origin_die; |
4b5d70fd | 13870 | int declaration = (DECL_EXTERNAL (decl_or_origin) |
211fa870 | 13871 | /* If DECL is COMDAT and has not actually been |
13872 | emitted, we cannot take its address; there | |
13873 | might end up being no definition anywhere in | |
13874 | the program. For example, consider the C++ | |
13875 | test case: | |
13876 | ||
61a9389f | 13877 | template <class T> |
13878 | struct S { static const int i = 7; }; | |
211fa870 | 13879 | |
61a9389f | 13880 | template <class T> |
13881 | const int S<T>::i; | |
13882 | ||
13883 | int f() { return S<int>::i; } | |
211fa870 | 13884 | |
211fa870 | 13885 | Here, S<int>::i is not DECL_EXTERNAL, but no |
13886 | definition is required, so the compiler will | |
61a9389f | 13887 | not emit a definition. */ |
4b5d70fd | 13888 | || (TREE_CODE (decl_or_origin) == VAR_DECL |
13889 | && DECL_COMDAT (decl_or_origin) | |
13890 | && !TREE_ASM_WRITTEN (decl_or_origin)) | |
e89530cd | 13891 | || class_or_namespace_scope_p (context_die)); |
cc324702 | 13892 | |
4b5d70fd | 13893 | if (!origin) |
13894 | origin = decl_ultimate_origin (decl); | |
13895 | ||
13896 | com_decl = fortran_common (decl_or_origin, &off); | |
a12691f0 | 13897 | |
13898 | /* Symbol in common gets emitted as a child of the common block, in the form | |
df4d540f | 13899 | of a data member. */ |
845c3089 | 13900 | if (com_decl) |
a12691f0 | 13901 | { |
845c3089 | 13902 | tree field; |
a12691f0 | 13903 | dw_die_ref com_die; |
bd63009e | 13904 | dw_loc_descr_ref loc; |
bbc59868 | 13905 | die_node com_die_arg; |
a12691f0 | 13906 | |
4b5d70fd | 13907 | var_die = lookup_decl_die (decl_or_origin); |
b61ffa4f | 13908 | if (var_die) |
bd63009e | 13909 | { |
b61ffa4f | 13910 | if (get_AT (var_die, DW_AT_location) == NULL) |
bd63009e | 13911 | { |
13912 | loc = loc_descriptor_from_tree (com_decl); | |
13913 | if (loc) | |
13914 | { | |
13915 | if (off) | |
bbc59868 | 13916 | { |
13917 | /* Optimize the common case. */ | |
13918 | if (loc->dw_loc_opc == DW_OP_addr | |
13919 | && loc->dw_loc_next == NULL | |
13920 | && GET_CODE (loc->dw_loc_oprnd1.v.val_addr) | |
13921 | == SYMBOL_REF) | |
13922 | loc->dw_loc_oprnd1.v.val_addr | |
13923 | = plus_constant (loc->dw_loc_oprnd1.v.val_addr, off); | |
13924 | else | |
1938132c | 13925 | loc_descr_plus_const (&loc, off); |
bbc59868 | 13926 | } |
b61ffa4f | 13927 | add_AT_loc (var_die, DW_AT_location, loc); |
13928 | remove_AT (var_die, DW_AT_declaration); | |
bd63009e | 13929 | } |
13930 | } | |
13931 | return; | |
13932 | } | |
bbc59868 | 13933 | |
13934 | if (common_block_die_table == NULL) | |
13935 | common_block_die_table | |
13936 | = htab_create_ggc (10, common_block_die_table_hash, | |
13937 | common_block_die_table_eq, NULL); | |
13938 | ||
845c3089 | 13939 | field = TREE_OPERAND (DECL_VALUE_EXPR (decl), 0); |
bbc59868 | 13940 | com_die_arg.decl_id = DECL_UID (com_decl); |
13941 | com_die_arg.die_parent = context_die; | |
13942 | com_die = (dw_die_ref) htab_find (common_block_die_table, &com_die_arg); | |
bd63009e | 13943 | loc = loc_descriptor_from_tree (com_decl); |
b61ffa4f | 13944 | if (com_die == NULL) |
df4d540f | 13945 | { |
13946 | const char *cnam | |
13947 | = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (com_decl)); | |
bbc59868 | 13948 | void **slot; |
df4d540f | 13949 | |
b61ffa4f | 13950 | com_die = new_die (DW_TAG_common_block, context_die, decl); |
13951 | add_name_and_src_coords_attributes (com_die, com_decl); | |
df4d540f | 13952 | if (loc) |
bd63009e | 13953 | { |
b61ffa4f | 13954 | add_AT_loc (com_die, DW_AT_location, loc); |
bd63009e | 13955 | /* Avoid sharing the same loc descriptor between |
13956 | DW_TAG_common_block and DW_TAG_variable. */ | |
13957 | loc = loc_descriptor_from_tree (com_decl); | |
13958 | } | |
df4d540f | 13959 | else if (DECL_EXTERNAL (decl)) |
b61ffa4f | 13960 | add_AT_flag (com_die, DW_AT_declaration, 1); |
13961 | add_pubname_string (cnam, com_die); /* ??? needed? */ | |
bbc59868 | 13962 | com_die->decl_id = DECL_UID (com_decl); |
13963 | slot = htab_find_slot (common_block_die_table, com_die, INSERT); | |
13964 | *slot = (void *) com_die; | |
df4d540f | 13965 | } |
b61ffa4f | 13966 | else if (get_AT (com_die, DW_AT_location) == NULL && loc) |
df4d540f | 13967 | { |
b61ffa4f | 13968 | add_AT_loc (com_die, DW_AT_location, loc); |
bd63009e | 13969 | loc = loc_descriptor_from_tree (com_decl); |
b61ffa4f | 13970 | remove_AT (com_die, DW_AT_declaration); |
df4d540f | 13971 | } |
b61ffa4f | 13972 | var_die = new_die (DW_TAG_variable, com_die, decl); |
13973 | add_name_and_src_coords_attributes (var_die, decl); | |
13974 | add_type_attribute (var_die, TREE_TYPE (decl), TREE_READONLY (decl), | |
845c3089 | 13975 | TREE_THIS_VOLATILE (decl), context_die); |
b61ffa4f | 13976 | add_AT_flag (var_die, DW_AT_external, 1); |
bd63009e | 13977 | if (loc) |
13978 | { | |
13979 | if (off) | |
bbc59868 | 13980 | { |
13981 | /* Optimize the common case. */ | |
13982 | if (loc->dw_loc_opc == DW_OP_addr | |
13983 | && loc->dw_loc_next == NULL | |
13984 | && GET_CODE (loc->dw_loc_oprnd1.v.val_addr) == SYMBOL_REF) | |
13985 | loc->dw_loc_oprnd1.v.val_addr | |
13986 | = plus_constant (loc->dw_loc_oprnd1.v.val_addr, off); | |
13987 | else | |
1938132c | 13988 | loc_descr_plus_const (&loc, off); |
bbc59868 | 13989 | } |
b61ffa4f | 13990 | add_AT_loc (var_die, DW_AT_location, loc); |
bd63009e | 13991 | } |
13992 | else if (DECL_EXTERNAL (decl)) | |
b61ffa4f | 13993 | add_AT_flag (var_die, DW_AT_declaration, 1); |
13994 | equate_decl_number_to_die (decl, var_die); | |
a12691f0 | 13995 | return; |
13996 | } | |
13997 | ||
ab977c1f | 13998 | /* If the compiler emitted a definition for the DECL declaration |
13999 | and if we already emitted a DIE for it, don't emit a second | |
14000 | DIE for it again. */ | |
14001 | if (old_die | |
14002 | && declaration | |
14003 | && old_die->die_parent == context_die) | |
14004 | return; | |
14005 | ||
a974aa3e | 14006 | /* For static data members, the declaration in the class is supposed |
14007 | to have DW_TAG_member tag; the specification should still be | |
14008 | DW_TAG_variable referencing the DW_TAG_member DIE. */ | |
14009 | if (declaration && class_scope_p (context_die)) | |
14010 | var_die = new_die (DW_TAG_member, context_die, decl); | |
14011 | else | |
14012 | var_die = new_die (DW_TAG_variable, context_die, decl); | |
a12691f0 | 14013 | |
ebcb0478 | 14014 | origin_die = NULL; |
30ade641 | 14015 | if (origin != NULL) |
ebcb0478 | 14016 | origin_die = add_abstract_origin_attribute (var_die, origin); |
8c3f468d | 14017 | |
5e1bdb0e | 14018 | /* Loop unrolling can create multiple blocks that refer to the same |
8c3f468d | 14019 | static variable, so we must test for the DW_AT_declaration flag. |
14020 | ||
14021 | ??? Loop unrolling/reorder_blocks should perhaps be rewritten to | |
5e1bdb0e | 14022 | copy decls and set the DECL_ABSTRACT flag on them instead of |
8c3f468d | 14023 | sharing them. |
14024 | ||
6e395578 | 14025 | ??? Duplicated blocks have been rewritten to use .debug_ranges. |
14026 | ||
14027 | ??? The declare_in_namespace support causes us to get two DIEs for one | |
14028 | variable, both of which are declarations. We want to avoid considering | |
14029 | one to be a specification, so we must test that this DIE is not a | |
14030 | declaration. */ | |
14031 | else if (old_die && TREE_STATIC (decl) && ! declaration | |
bc70bd5e | 14032 | && get_AT_flag (old_die, DW_AT_declaration) == 1) |
6ed29fb8 | 14033 | { |
2b553659 | 14034 | /* This is a definition of a C++ class level static. */ |
023dc493 | 14035 | add_AT_specification (var_die, old_die); |
6ed29fb8 | 14036 | if (DECL_NAME (decl)) |
14037 | { | |
7bd3dcc4 | 14038 | expanded_location s = expand_location (DECL_SOURCE_LOCATION (decl)); |
69278c24 | 14039 | struct dwarf_file_data * file_index = lookup_filename (s.file); |
ec1e49cc | 14040 | |
69278c24 | 14041 | if (get_AT_file (old_die, DW_AT_decl_file) != file_index) |
14042 | add_AT_file (var_die, DW_AT_decl_file, file_index); | |
ec1e49cc | 14043 | |
69278c24 | 14044 | if (get_AT_unsigned (old_die, DW_AT_decl_line) != (unsigned) s.line) |
7bd3dcc4 | 14045 | add_AT_unsigned (var_die, DW_AT_decl_line, s.line); |
6ed29fb8 | 14046 | } |
14047 | } | |
30ade641 | 14048 | else |
14049 | { | |
73bcd2ba | 14050 | tree type = TREE_TYPE (decl); |
1095d222 | 14051 | bool private_flag_valid = true; |
1a3ef8f6 | 14052 | |
14053 | add_name_and_src_coords_attributes (var_die, decl); | |
73bcd2ba | 14054 | if ((TREE_CODE (decl) == PARM_DECL |
1095d222 | 14055 | || TREE_CODE (decl) == RESULT_DECL |
14056 | || (TREE_CODE (decl) == VAR_DECL && !TREE_STATIC (decl))) | |
73bcd2ba | 14057 | && DECL_BY_REFERENCE (decl)) |
1095d222 | 14058 | { |
14059 | add_type_attribute (var_die, TREE_TYPE (type), 0, 0, context_die); | |
14060 | /* DECL_BY_REFERENCE uses the same bit as TREE_PRIVATE, | |
14061 | for PARM_DECL, RESULT_DECL or non-static VAR_DECL. */ | |
14062 | private_flag_valid = false; | |
14063 | } | |
1a3ef8f6 | 14064 | else |
14065 | add_type_attribute (var_die, type, TREE_READONLY (decl), | |
14066 | TREE_THIS_VOLATILE (decl), context_die); | |
ec1e49cc | 14067 | |
6542a017 | 14068 | if (TREE_PUBLIC (decl)) |
14069 | add_AT_flag (var_die, DW_AT_external, 1); | |
ec1e49cc | 14070 | |
6542a017 | 14071 | if (DECL_ARTIFICIAL (decl)) |
14072 | add_AT_flag (var_die, DW_AT_artificial, 1); | |
ec1e49cc | 14073 | |
6efd403b | 14074 | if (TREE_PROTECTED (decl)) |
14075 | add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_protected); | |
1095d222 | 14076 | else if (private_flag_valid && TREE_PRIVATE (decl)) |
6efd403b | 14077 | add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_private); |
30ade641 | 14078 | } |
cc324702 | 14079 | |
14080 | if (declaration) | |
14081 | add_AT_flag (var_die, DW_AT_declaration, 1); | |
f80d1bcd | 14082 | |
4b5d70fd | 14083 | if (decl && (DECL_ABSTRACT (decl) || declaration)) |
cc324702 | 14084 | equate_decl_number_to_die (decl, var_die); |
14085 | ||
ebcb0478 | 14086 | if (! declaration |
14087 | && (! DECL_ABSTRACT (decl_or_origin) | |
14088 | /* Local static vars are shared between all clones/inlines, | |
14089 | so emit DW_AT_location on the abstract DIE if DECL_RTL is | |
14090 | already set. */ | |
14091 | || (TREE_CODE (decl_or_origin) == VAR_DECL | |
14092 | && TREE_STATIC (decl_or_origin) | |
14093 | && DECL_RTL_SET_P (decl_or_origin))) | |
14094 | /* When abstract origin already has DW_AT_location attribute, no need | |
14095 | to add it again. */ | |
14096 | && (origin_die == NULL || get_AT (origin_die, DW_AT_location) == NULL)) | |
30ade641 | 14097 | { |
4b5d70fd | 14098 | if (TREE_CODE (decl_or_origin) == VAR_DECL && TREE_STATIC (decl_or_origin) |
14099 | && !TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl_or_origin))) | |
14100 | defer_location (decl_or_origin, var_die); | |
89f29a1b | 14101 | else |
4b5d70fd | 14102 | add_location_or_const_value_attribute (var_die, |
14103 | decl_or_origin, | |
14104 | DW_AT_location); | |
14105 | add_pubname (decl_or_origin, var_die); | |
30ade641 | 14106 | } |
eabb26f3 | 14107 | else |
4b5d70fd | 14108 | tree_add_const_value_attribute (var_die, decl_or_origin); |
30ade641 | 14109 | } |
14110 | ||
2eb674c9 | 14111 | /* Generate a DIE to represent a named constant. */ |
14112 | ||
14113 | static void | |
14114 | gen_const_die (tree decl, dw_die_ref context_die) | |
14115 | { | |
14116 | dw_die_ref const_die; | |
14117 | tree type = TREE_TYPE (decl); | |
14118 | ||
14119 | const_die = new_die (DW_TAG_constant, context_die, decl); | |
14120 | add_name_and_src_coords_attributes (const_die, decl); | |
14121 | add_type_attribute (const_die, type, 1, 0, context_die); | |
14122 | if (TREE_PUBLIC (decl)) | |
14123 | add_AT_flag (const_die, DW_AT_external, 1); | |
14124 | if (DECL_ARTIFICIAL (decl)) | |
14125 | add_AT_flag (const_die, DW_AT_artificial, 1); | |
14126 | tree_add_const_value_attribute (const_die, decl); | |
14127 | } | |
14128 | ||
30ade641 | 14129 | /* Generate a DIE to represent a label identifier. */ |
ec1e49cc | 14130 | |
30ade641 | 14131 | static void |
8ec3a57b | 14132 | gen_label_die (tree decl, dw_die_ref context_die) |
30ade641 | 14133 | { |
19cb6b50 | 14134 | tree origin = decl_ultimate_origin (decl); |
15cfae4e | 14135 | dw_die_ref lbl_die = new_die (DW_TAG_label, context_die, decl); |
19cb6b50 | 14136 | rtx insn; |
30ade641 | 14137 | char label[MAX_ARTIFICIAL_LABEL_BYTES]; |
ec1e49cc | 14138 | |
30ade641 | 14139 | if (origin != NULL) |
ec1e49cc | 14140 | add_abstract_origin_attribute (lbl_die, origin); |
30ade641 | 14141 | else |
ec1e49cc | 14142 | add_name_and_src_coords_attributes (lbl_die, decl); |
14143 | ||
30ade641 | 14144 | if (DECL_ABSTRACT (decl)) |
ec1e49cc | 14145 | equate_decl_number_to_die (decl, lbl_die); |
30ade641 | 14146 | else |
14147 | { | |
c9f0a9eb | 14148 | insn = DECL_RTL_IF_SET (decl); |
165b3519 | 14149 | |
14150 | /* Deleted labels are programmer specified labels which have been | |
7ef5b942 | 14151 | eliminated because of various optimizations. We still emit them |
165b3519 | 14152 | here so that it is possible to put breakpoints on them. */ |
c9f0a9eb | 14153 | if (insn |
6d7dc5b9 | 14154 | && (LABEL_P (insn) |
14155 | || ((NOTE_P (insn) | |
ad4583d9 | 14156 | && NOTE_KIND (insn) == NOTE_INSN_DELETED_LABEL)))) |
30ade641 | 14157 | { |
f80d1bcd | 14158 | /* When optimization is enabled (via -O) some parts of the compiler |
14159 | (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which | |
30ade641 | 14160 | represent source-level labels which were explicitly declared by |
14161 | the user. This really shouldn't be happening though, so catch | |
14162 | it if it ever does happen. */ | |
7bd4f6b6 | 14163 | gcc_assert (!INSN_DELETED_P (insn)); |
ec1e49cc | 14164 | |
1134a028 | 14165 | ASM_GENERATE_INTERNAL_LABEL (label, "L", CODE_LABEL_NUMBER (insn)); |
30ade641 | 14166 | add_AT_lbl_id (lbl_die, DW_AT_low_pc, label); |
14167 | } | |
14168 | } | |
14169 | } | |
14170 | ||
44276901 | 14171 | /* A helper function for gen_inlined_subroutine_die. Add source coordinate |
14172 | attributes to the DIE for a block STMT, to describe where the inlined | |
14173 | function was called from. This is similar to add_src_coords_attributes. */ | |
14174 | ||
14175 | static inline void | |
14176 | add_call_src_coords_attributes (tree stmt, dw_die_ref die) | |
14177 | { | |
14178 | expanded_location s = expand_location (BLOCK_SOURCE_LOCATION (stmt)); | |
44276901 | 14179 | |
69278c24 | 14180 | add_AT_file (die, DW_AT_call_file, lookup_filename (s.file)); |
44276901 | 14181 | add_AT_unsigned (die, DW_AT_call_line, s.line); |
14182 | } | |
14183 | ||
17db73b6 | 14184 | |
3ac15270 | 14185 | /* A helper function for gen_lexical_block_die and gen_inlined_subroutine_die. |
14186 | Add low_pc and high_pc attributes to the DIE for a block STMT. */ | |
ec1e49cc | 14187 | |
3ac15270 | 14188 | static inline void |
14189 | add_high_low_attributes (tree stmt, dw_die_ref die) | |
30ade641 | 14190 | { |
30ade641 | 14191 | char label[MAX_ARTIFICIAL_LABEL_BYTES]; |
ec1e49cc | 14192 | |
3ac15270 | 14193 | if (BLOCK_FRAGMENT_CHAIN (stmt)) |
30ade641 | 14194 | { |
3ac15270 | 14195 | tree chain; |
a36145ca | 14196 | |
cee43f7e | 14197 | if (inlined_function_outer_scope_p (stmt)) |
17db73b6 | 14198 | { |
14199 | ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL, | |
14200 | BLOCK_NUMBER (stmt)); | |
14201 | add_AT_lbl_id (die, DW_AT_entry_pc, label); | |
14202 | } | |
14203 | ||
3ac15270 | 14204 | add_AT_range_list (die, DW_AT_ranges, add_ranges (stmt)); |
a36145ca | 14205 | |
3ac15270 | 14206 | chain = BLOCK_FRAGMENT_CHAIN (stmt); |
14207 | do | |
a36145ca | 14208 | { |
3ac15270 | 14209 | add_ranges (chain); |
14210 | chain = BLOCK_FRAGMENT_CHAIN (chain); | |
a36145ca | 14211 | } |
3ac15270 | 14212 | while (chain); |
14213 | add_ranges (NULL); | |
14214 | } | |
14215 | else | |
14216 | { | |
14217 | ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL, | |
14218 | BLOCK_NUMBER (stmt)); | |
14219 | add_AT_lbl_id (die, DW_AT_low_pc, label); | |
14220 | ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, | |
14221 | BLOCK_NUMBER (stmt)); | |
14222 | add_AT_lbl_id (die, DW_AT_high_pc, label); | |
30ade641 | 14223 | } |
3ac15270 | 14224 | } |
14225 | ||
14226 | /* Generate a DIE for a lexical block. */ | |
14227 | ||
14228 | static void | |
14229 | gen_lexical_block_die (tree stmt, dw_die_ref context_die, int depth) | |
14230 | { | |
14231 | dw_die_ref stmt_die = new_die (DW_TAG_lexical_block, context_die, stmt); | |
14232 | ||
4b5d70fd | 14233 | if (! BLOCK_ABSTRACT (stmt) && TREE_ASM_WRITTEN (stmt)) |
3ac15270 | 14234 | add_high_low_attributes (stmt, stmt_die); |
ec1e49cc | 14235 | |
cb371216 | 14236 | decls_for_scope (stmt, stmt_die, depth); |
30ade641 | 14237 | } |
14238 | ||
14239 | /* Generate a DIE for an inlined subprogram. */ | |
ec1e49cc | 14240 | |
30ade641 | 14241 | static void |
8ec3a57b | 14242 | gen_inlined_subroutine_die (tree stmt, dw_die_ref context_die, int depth) |
30ade641 | 14243 | { |
b1682481 | 14244 | tree decl = block_ultimate_origin (stmt); |
14245 | ||
14246 | /* Emit info for the abstract instance first, if we haven't yet. We | |
14247 | must emit this even if the block is abstract, otherwise when we | |
14248 | emit the block below (or elsewhere), we may end up trying to emit | |
14249 | a die whose origin die hasn't been emitted, and crashing. */ | |
14250 | dwarf2out_abstract_function (decl); | |
14251 | ||
ec1e49cc | 14252 | if (! BLOCK_ABSTRACT (stmt)) |
30ade641 | 14253 | { |
19cb6b50 | 14254 | dw_die_ref subr_die |
15cfae4e | 14255 | = new_die (DW_TAG_inlined_subroutine, context_die, stmt); |
ec1e49cc | 14256 | |
db42c2b2 | 14257 | add_abstract_origin_attribute (subr_die, decl); |
4b5d70fd | 14258 | if (TREE_ASM_WRITTEN (stmt)) |
14259 | add_high_low_attributes (stmt, subr_die); | |
44276901 | 14260 | add_call_src_coords_attributes (stmt, subr_die); |
3ac15270 | 14261 | |
cb371216 | 14262 | decls_for_scope (stmt, subr_die, depth); |
a3899bb7 | 14263 | current_function_has_inlines = 1; |
30ade641 | 14264 | } |
6e1e0aa6 | 14265 | else |
14266 | /* We may get here if we're the outer block of function A that was | |
14267 | inlined into function B that was inlined into function C. When | |
14268 | generating debugging info for C, dwarf2out_abstract_function(B) | |
14269 | would mark all inlined blocks as abstract, including this one. | |
14270 | So, we wouldn't (and shouldn't) expect labels to be generated | |
14271 | for this one. Instead, just emit debugging info for | |
14272 | declarations within the block. This is particularly important | |
14273 | in the case of initializers of arguments passed from B to us: | |
14274 | if they're statement expressions containing declarations, we | |
14275 | wouldn't generate dies for their abstract variables, and then, | |
14276 | when generating dies for the real variables, we'd die (pun | |
14277 | intended :-) */ | |
14278 | gen_lexical_block_die (stmt, context_die, depth); | |
30ade641 | 14279 | } |
14280 | ||
14281 | /* Generate a DIE for a field in a record, or structure. */ | |
ec1e49cc | 14282 | |
30ade641 | 14283 | static void |
8ec3a57b | 14284 | gen_field_die (tree decl, dw_die_ref context_die) |
30ade641 | 14285 | { |
443a33a3 | 14286 | dw_die_ref decl_die; |
ec1e49cc | 14287 | |
443a33a3 | 14288 | if (TREE_TYPE (decl) == error_mark_node) |
14289 | return; | |
8ec3a57b | 14290 | |
443a33a3 | 14291 | decl_die = new_die (DW_TAG_member, context_die, decl); |
30ade641 | 14292 | add_name_and_src_coords_attributes (decl_die, decl); |
30ade641 | 14293 | add_type_attribute (decl_die, member_declared_type (decl), |
14294 | TREE_READONLY (decl), TREE_THIS_VOLATILE (decl), | |
14295 | context_die); | |
ec1e49cc | 14296 | |
30ade641 | 14297 | if (DECL_BIT_FIELD_TYPE (decl)) |
14298 | { | |
14299 | add_byte_size_attribute (decl_die, decl); | |
14300 | add_bit_size_attribute (decl_die, decl); | |
14301 | add_bit_offset_attribute (decl_die, decl); | |
14302 | } | |
ec1e49cc | 14303 | |
6efd403b | 14304 | if (TREE_CODE (DECL_FIELD_CONTEXT (decl)) != UNION_TYPE) |
14305 | add_data_member_location_attribute (decl_die, decl); | |
ec1e49cc | 14306 | |
6542a017 | 14307 | if (DECL_ARTIFICIAL (decl)) |
14308 | add_AT_flag (decl_die, DW_AT_artificial, 1); | |
ec1e49cc | 14309 | |
6efd403b | 14310 | if (TREE_PROTECTED (decl)) |
14311 | add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_protected); | |
14312 | else if (TREE_PRIVATE (decl)) | |
14313 | add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_private); | |
243f8437 | 14314 | |
14315 | /* Equate decl number to die, so that we can look up this decl later on. */ | |
14316 | equate_decl_number_to_die (decl, decl_die); | |
30ade641 | 14317 | } |
14318 | ||
db42c2b2 | 14319 | #if 0 |
14320 | /* Don't generate either pointer_type DIEs or reference_type DIEs here. | |
14321 | Use modified_type_die instead. | |
30ade641 | 14322 | We keep this code here just in case these types of DIEs may be needed to |
14323 | represent certain things in other languages (e.g. Pascal) someday. */ | |
8c3f468d | 14324 | |
30ade641 | 14325 | static void |
8ec3a57b | 14326 | gen_pointer_type_die (tree type, dw_die_ref context_die) |
30ade641 | 14327 | { |
19cb6b50 | 14328 | dw_die_ref ptr_die |
15cfae4e | 14329 | = new_die (DW_TAG_pointer_type, scope_die_for (type, context_die), type); |
ec1e49cc | 14330 | |
30ade641 | 14331 | equate_type_number_to_die (type, ptr_die); |
30ade641 | 14332 | add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die); |
db42c2b2 | 14333 | add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE); |
30ade641 | 14334 | } |
14335 | ||
db42c2b2 | 14336 | /* Don't generate either pointer_type DIEs or reference_type DIEs here. |
14337 | Use modified_type_die instead. | |
30ade641 | 14338 | We keep this code here just in case these types of DIEs may be needed to |
14339 | represent certain things in other languages (e.g. Pascal) someday. */ | |
8c3f468d | 14340 | |
30ade641 | 14341 | static void |
8ec3a57b | 14342 | gen_reference_type_die (tree type, dw_die_ref context_die) |
30ade641 | 14343 | { |
19cb6b50 | 14344 | dw_die_ref ref_die |
15cfae4e | 14345 | = new_die (DW_TAG_reference_type, scope_die_for (type, context_die), type); |
ec1e49cc | 14346 | |
30ade641 | 14347 | equate_type_number_to_die (type, ref_die); |
30ade641 | 14348 | add_type_attribute (ref_die, TREE_TYPE (type), 0, 0, context_die); |
db42c2b2 | 14349 | add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE); |
30ade641 | 14350 | } |
db42c2b2 | 14351 | #endif |
30ade641 | 14352 | |
14353 | /* Generate a DIE for a pointer to a member type. */ | |
8c3f468d | 14354 | |
30ade641 | 14355 | static void |
8ec3a57b | 14356 | gen_ptr_to_mbr_type_die (tree type, dw_die_ref context_die) |
30ade641 | 14357 | { |
19cb6b50 | 14358 | dw_die_ref ptr_die |
15cfae4e | 14359 | = new_die (DW_TAG_ptr_to_member_type, |
14360 | scope_die_for (type, context_die), type); | |
ec1e49cc | 14361 | |
30ade641 | 14362 | equate_type_number_to_die (type, ptr_die); |
30ade641 | 14363 | add_AT_die_ref (ptr_die, DW_AT_containing_type, |
6ed29fb8 | 14364 | lookup_type_die (TYPE_OFFSET_BASETYPE (type))); |
30ade641 | 14365 | add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die); |
14366 | } | |
14367 | ||
14368 | /* Generate the DIE for the compilation unit. */ | |
ec1e49cc | 14369 | |
c90bf86c | 14370 | static dw_die_ref |
8ec3a57b | 14371 | gen_compile_unit_die (const char *filename) |
30ade641 | 14372 | { |
19cb6b50 | 14373 | dw_die_ref die; |
30ade641 | 14374 | char producer[250]; |
d19bd1f0 | 14375 | const char *language_string = lang_hooks.name; |
c90bf86c | 14376 | int language; |
30ade641 | 14377 | |
15cfae4e | 14378 | die = new_die (DW_TAG_compile_unit, NULL, NULL); |
6ed29fb8 | 14379 | |
ff279357 | 14380 | if (filename) |
14381 | { | |
14382 | add_name_attribute (die, filename); | |
6d042e21 | 14383 | /* Don't add cwd for <built-in>. */ |
974a92fe | 14384 | if (!IS_ABSOLUTE_PATH (filename) && filename[0] != '<') |
ff279357 | 14385 | add_comp_dir_attribute (die); |
14386 | } | |
30ade641 | 14387 | |
14388 | sprintf (producer, "%s %s", language_string, version_string); | |
14389 | ||
14390 | #ifdef MIPS_DEBUGGING_INFO | |
14391 | /* The MIPS/SGI compilers place the 'cc' command line options in the producer | |
14392 | string. The SGI debugger looks for -g, -g1, -g2, or -g3; if they do | |
14393 | not appear in the producer string, the debugger reaches the conclusion | |
14394 | that the object file is stripped and has no debugging information. | |
14395 | To get the MIPS/SGI debugger to believe that there is debugging | |
14396 | information in the object file, we add a -g to the producer string. */ | |
43f116ae | 14397 | if (debug_info_level > DINFO_LEVEL_TERSE) |
14398 | strcat (producer, " -g"); | |
30ade641 | 14399 | #endif |
14400 | ||
c90bf86c | 14401 | add_AT_string (die, DW_AT_producer, producer); |
5b67860b | 14402 | |
30ade641 | 14403 | if (strcmp (language_string, "GNU C++") == 0) |
c90bf86c | 14404 | language = DW_LANG_C_plus_plus; |
30ade641 | 14405 | else if (strcmp (language_string, "GNU Ada") == 0) |
7f2ad96e | 14406 | language = DW_LANG_Ada95; |
5b67860b | 14407 | else if (strcmp (language_string, "GNU F77") == 0) |
c90bf86c | 14408 | language = DW_LANG_Fortran77; |
00c6e780 | 14409 | else if (strcmp (language_string, "GNU Fortran") == 0) |
4ee9c684 | 14410 | language = DW_LANG_Fortran95; |
063295fb | 14411 | else if (strcmp (language_string, "GNU Pascal") == 0) |
c90bf86c | 14412 | language = DW_LANG_Pascal83; |
af4d39d8 | 14413 | else if (strcmp (language_string, "GNU Java") == 0) |
14414 | language = DW_LANG_Java; | |
bda642f9 | 14415 | else if (strcmp (language_string, "GNU Objective-C") == 0) |
14416 | language = DW_LANG_ObjC; | |
14417 | else if (strcmp (language_string, "GNU Objective-C++") == 0) | |
14418 | language = DW_LANG_ObjC_plus_plus; | |
30ade641 | 14419 | else |
c90bf86c | 14420 | language = DW_LANG_C89; |
5b67860b | 14421 | |
c90bf86c | 14422 | add_AT_unsigned (die, DW_AT_language, language); |
c90bf86c | 14423 | return die; |
30ade641 | 14424 | } |
14425 | ||
404ba76d | 14426 | /* Generate the DIE for a base class. */ |
ec1e49cc | 14427 | |
404ba76d | 14428 | static void |
8ec3a57b | 14429 | gen_inheritance_die (tree binfo, tree access, dw_die_ref context_die) |
404ba76d | 14430 | { |
15cfae4e | 14431 | dw_die_ref die = new_die (DW_TAG_inheritance, context_die, binfo); |
ec1e49cc | 14432 | |
404ba76d | 14433 | add_type_attribute (die, BINFO_TYPE (binfo), 0, 0, context_die); |
14434 | add_data_member_location_attribute (die, binfo); | |
ec1e49cc | 14435 | |
57c28194 | 14436 | if (BINFO_VIRTUAL_P (binfo)) |
404ba76d | 14437 | add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual); |
8c3f468d | 14438 | |
95f3173a | 14439 | if (access == access_public_node) |
404ba76d | 14440 | add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_public); |
95f3173a | 14441 | else if (access == access_protected_node) |
404ba76d | 14442 | add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_protected); |
14443 | } | |
14444 | ||
ad87de1e | 14445 | /* Generate a DIE for a class member. */ |
ec1e49cc | 14446 | |
30ade641 | 14447 | static void |
8ec3a57b | 14448 | gen_member_die (tree type, dw_die_ref context_die) |
30ade641 | 14449 | { |
19cb6b50 | 14450 | tree member; |
95f3173a | 14451 | tree binfo = TYPE_BINFO (type); |
e7b3c55c | 14452 | dw_die_ref child; |
ec1e49cc | 14453 | |
30ade641 | 14454 | /* If this is not an incomplete type, output descriptions of each of its |
14455 | members. Note that as we output the DIEs necessary to represent the | |
14456 | members of this record or union type, we will also be trying to output | |
14457 | DIEs to represent the *types* of those members. However the `type' | |
f80d1bcd | 14458 | function (above) will specifically avoid generating type DIEs for member |
4a82352a | 14459 | types *within* the list of member DIEs for this (containing) type except |
30ade641 | 14460 | for those types (of members) which are explicitly marked as also being |
14461 | members of this (containing) type themselves. The g++ front- end can | |
8c3f468d | 14462 | force any given type to be treated as a member of some other (containing) |
14463 | type by setting the TYPE_CONTEXT of the given (member) type to point to | |
14464 | the TREE node representing the appropriate (containing) type. */ | |
30ade641 | 14465 | |
404ba76d | 14466 | /* First output info about the base classes. */ |
f6cc6a08 | 14467 | if (binfo) |
30ade641 | 14468 | { |
046bfc77 | 14469 | VEC(tree,gc) *accesses = BINFO_BASE_ACCESSES (binfo); |
19cb6b50 | 14470 | int i; |
f6cc6a08 | 14471 | tree base; |
404ba76d | 14472 | |
f6cc6a08 | 14473 | for (i = 0; BINFO_BASE_ITERATE (binfo, i, base); i++) |
14474 | gen_inheritance_die (base, | |
db77fe17 | 14475 | (accesses ? VEC_index (tree, accesses, i) |
95f3173a | 14476 | : access_public_node), context_die); |
30ade641 | 14477 | } |
14478 | ||
404ba76d | 14479 | /* Now output info about the data members and type members. */ |
14480 | for (member = TYPE_FIELDS (type); member; member = TREE_CHAIN (member)) | |
e7b3c55c | 14481 | { |
14482 | /* If we thought we were generating minimal debug info for TYPE | |
14483 | and then changed our minds, some of the member declarations | |
14484 | may have already been defined. Don't define them again, but | |
14485 | do put them in the right order. */ | |
14486 | ||
14487 | child = lookup_decl_die (member); | |
14488 | if (child) | |
14489 | splice_child_die (context_die, child); | |
14490 | else | |
4b5d70fd | 14491 | gen_decl_die (member, NULL, context_die); |
e7b3c55c | 14492 | } |
404ba76d | 14493 | |
30ade641 | 14494 | /* Now output info about the function members (if any). */ |
404ba76d | 14495 | for (member = TYPE_METHODS (type); member; member = TREE_CHAIN (member)) |
e7b3c55c | 14496 | { |
8f80e66d | 14497 | /* Don't include clones in the member list. */ |
14498 | if (DECL_ABSTRACT_ORIGIN (member)) | |
14499 | continue; | |
14500 | ||
e7b3c55c | 14501 | child = lookup_decl_die (member); |
14502 | if (child) | |
14503 | splice_child_die (context_die, child); | |
14504 | else | |
4b5d70fd | 14505 | gen_decl_die (member, NULL, context_die); |
e7b3c55c | 14506 | } |
30ade641 | 14507 | } |
14508 | ||
e7b3c55c | 14509 | /* Generate a DIE for a structure or union type. If TYPE_DECL_SUPPRESS_DEBUG |
14510 | is set, we pretend that the type was never defined, so we only get the | |
14511 | member DIEs needed by later specification DIEs. */ | |
ec1e49cc | 14512 | |
30ade641 | 14513 | static void |
0e4744ac | 14514 | gen_struct_or_union_type_die (tree type, dw_die_ref context_die, |
14515 | enum debug_info_usage usage) | |
30ade641 | 14516 | { |
19cb6b50 | 14517 | dw_die_ref type_die = lookup_type_die (type); |
14518 | dw_die_ref scope_die = 0; | |
14519 | int nested = 0; | |
e7b3c55c | 14520 | int complete = (TYPE_SIZE (type) |
87ccbd32 | 14521 | && (! TYPE_STUB_DECL (type) |
14522 | || ! TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type)))); | |
e89530cd | 14523 | int ns_decl = (context_die && context_die->die_tag == DW_TAG_namespace); |
0e4744ac | 14524 | complete = complete && should_emit_struct_debug (type, usage); |
6542a017 | 14525 | |
e7b3c55c | 14526 | if (type_die && ! complete) |
6542a017 | 14527 | return; |
a3377a8b | 14528 | |
ec1e49cc | 14529 | if (TYPE_CONTEXT (type) != NULL_TREE |
e89530cd | 14530 | && (AGGREGATE_TYPE_P (TYPE_CONTEXT (type)) |
14531 | || TREE_CODE (TYPE_CONTEXT (type)) == NAMESPACE_DECL)) | |
a3377a8b | 14532 | nested = 1; |
14533 | ||
6efd403b | 14534 | scope_die = scope_die_for (type, context_die); |
a3377a8b | 14535 | |
14536 | if (! type_die || (nested && scope_die == comp_unit_die)) | |
6542a017 | 14537 | /* First occurrence of type or toplevel definition of nested class. */ |
30ade641 | 14538 | { |
19cb6b50 | 14539 | dw_die_ref old_die = type_die; |
ec1e49cc | 14540 | |
30ade641 | 14541 | type_die = new_die (TREE_CODE (type) == RECORD_TYPE |
03a61d93 | 14542 | ? record_type_tag (type) : DW_TAG_union_type, |
15cfae4e | 14543 | scope_die, type); |
30ade641 | 14544 | equate_type_number_to_die (type, type_die); |
6542a017 | 14545 | if (old_die) |
023dc493 | 14546 | add_AT_specification (type_die, old_die); |
2dfaa9ec | 14547 | else |
14548 | add_name_attribute (type_die, type_tag (type)); | |
30ade641 | 14549 | } |
752e49ca | 14550 | else |
6542a017 | 14551 | remove_AT (type_die, DW_AT_declaration); |
30ade641 | 14552 | |
14553 | /* If this type has been completed, then give it a byte_size attribute and | |
14554 | then give a list of members. */ | |
e89530cd | 14555 | if (complete && !ns_decl) |
30ade641 | 14556 | { |
f80d1bcd | 14557 | /* Prevent infinite recursion in cases where the type of some member of |
c83a163c | 14558 | this type is expressed in terms of this type itself. */ |
30ade641 | 14559 | TREE_ASM_WRITTEN (type) = 1; |
6542a017 | 14560 | add_byte_size_attribute (type_die, type); |
0dbd1c74 | 14561 | if (TYPE_STUB_DECL (type) != NULL_TREE) |
840b696a | 14562 | add_src_coords_attributes (type_die, TYPE_STUB_DECL (type)); |
ec1e49cc | 14563 | |
678d90bb | 14564 | /* If the first reference to this type was as the return type of an |
14565 | inline function, then it may not have a parent. Fix this now. */ | |
14566 | if (type_die->die_parent == NULL) | |
14567 | add_child_die (scope_die, type_die); | |
14568 | ||
6542a017 | 14569 | push_decl_scope (type); |
14570 | gen_member_die (type, type_die); | |
14571 | pop_decl_scope (); | |
ec1e49cc | 14572 | |
6efd403b | 14573 | /* GNU extension: Record what type our vtable lives in. */ |
14574 | if (TYPE_VFIELD (type)) | |
14575 | { | |
14576 | tree vtype = DECL_FCONTEXT (TYPE_VFIELD (type)); | |
ec1e49cc | 14577 | |
ad5808e7 | 14578 | gen_type_die (vtype, context_die); |
14579 | add_AT_die_ref (type_die, DW_AT_containing_type, | |
14580 | lookup_type_die (vtype)); | |
6efd403b | 14581 | } |
30ade641 | 14582 | } |
752e49ca | 14583 | else |
a4617d03 | 14584 | { |
14585 | add_AT_flag (type_die, DW_AT_declaration, 1); | |
a41e1595 | 14586 | |
ee1cd281 | 14587 | /* We don't need to do this for function-local types. */ |
cfd66c04 | 14588 | if (TYPE_STUB_DECL (type) |
14589 | && ! decl_function_context (TYPE_STUB_DECL (type))) | |
22230dd1 | 14590 | VEC_safe_push (tree, gc, incomplete_types, type); |
a4617d03 | 14591 | } |
af84796a | 14592 | |
14593 | if (get_AT (type_die, DW_AT_name)) | |
14594 | add_pubtype (type, type_die); | |
30ade641 | 14595 | } |
14596 | ||
14597 | /* Generate a DIE for a subroutine _type_. */ | |
ec1e49cc | 14598 | |
30ade641 | 14599 | static void |
8ec3a57b | 14600 | gen_subroutine_type_die (tree type, dw_die_ref context_die) |
30ade641 | 14601 | { |
19cb6b50 | 14602 | tree return_type = TREE_TYPE (type); |
14603 | dw_die_ref subr_die | |
15cfae4e | 14604 | = new_die (DW_TAG_subroutine_type, |
14605 | scope_die_for (type, context_die), type); | |
ec1e49cc | 14606 | |
30ade641 | 14607 | equate_type_number_to_die (type, subr_die); |
14608 | add_prototyped_attribute (subr_die, type); | |
30ade641 | 14609 | add_type_attribute (subr_die, return_type, 0, 0, context_die); |
6efd403b | 14610 | gen_formal_types_die (type, subr_die); |
af84796a | 14611 | |
14612 | if (get_AT (subr_die, DW_AT_name)) | |
14613 | add_pubtype (type, subr_die); | |
30ade641 | 14614 | } |
14615 | ||
2358393e | 14616 | /* Generate a DIE for a type definition. */ |
ec1e49cc | 14617 | |
30ade641 | 14618 | static void |
8ec3a57b | 14619 | gen_typedef_die (tree decl, dw_die_ref context_die) |
30ade641 | 14620 | { |
19cb6b50 | 14621 | dw_die_ref type_die; |
14622 | tree origin; | |
6efd403b | 14623 | |
14624 | if (TREE_ASM_WRITTEN (decl)) | |
14625 | return; | |
6efd403b | 14626 | |
8c3f468d | 14627 | TREE_ASM_WRITTEN (decl) = 1; |
15cfae4e | 14628 | type_die = new_die (DW_TAG_typedef, context_die, decl); |
6efd403b | 14629 | origin = decl_ultimate_origin (decl); |
30ade641 | 14630 | if (origin != NULL) |
6efd403b | 14631 | add_abstract_origin_attribute (type_die, origin); |
30ade641 | 14632 | else |
14633 | { | |
19cb6b50 | 14634 | tree type; |
8c3f468d | 14635 | |
30ade641 | 14636 | add_name_and_src_coords_attributes (type_die, decl); |
6efd403b | 14637 | if (DECL_ORIGINAL_TYPE (decl)) |
14638 | { | |
14639 | type = DECL_ORIGINAL_TYPE (decl); | |
522649bb | 14640 | |
7bd4f6b6 | 14641 | gcc_assert (type != TREE_TYPE (decl)); |
14642 | equate_type_number_to_die (TREE_TYPE (decl), type_die); | |
6efd403b | 14643 | } |
14644 | else | |
14645 | type = TREE_TYPE (decl); | |
8c3f468d | 14646 | |
6efd403b | 14647 | add_type_attribute (type_die, type, TREE_READONLY (decl), |
14648 | TREE_THIS_VOLATILE (decl), context_die); | |
30ade641 | 14649 | } |
ec1e49cc | 14650 | |
30ade641 | 14651 | if (DECL_ABSTRACT (decl)) |
6efd403b | 14652 | equate_decl_number_to_die (decl, type_die); |
af84796a | 14653 | |
14654 | if (get_AT (type_die, DW_AT_name)) | |
14655 | add_pubtype (decl, type_die); | |
30ade641 | 14656 | } |
14657 | ||
14658 | /* Generate a type description DIE. */ | |
ec1e49cc | 14659 | |
30ade641 | 14660 | static void |
0e4744ac | 14661 | gen_type_die_with_usage (tree type, dw_die_ref context_die, |
14662 | enum debug_info_usage usage) | |
30ade641 | 14663 | { |
5c65b85a | 14664 | int need_pop; |
1c79cc8c | 14665 | struct array_descr_info info; |
5c65b85a | 14666 | |
ec1e49cc | 14667 | if (type == NULL_TREE || type == error_mark_node) |
14668 | return; | |
30ade641 | 14669 | |
6efd403b | 14670 | if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL |
14671 | && DECL_ORIGINAL_TYPE (TYPE_NAME (type))) | |
f80d1bcd | 14672 | { |
dc346c40 | 14673 | if (TREE_ASM_WRITTEN (type)) |
14674 | return; | |
14675 | ||
637d3308 | 14676 | /* Prevent broken recursion; we can't hand off to the same type. */ |
7bd4f6b6 | 14677 | gcc_assert (DECL_ORIGINAL_TYPE (TYPE_NAME (type)) != type); |
637d3308 | 14678 | |
6efd403b | 14679 | TREE_ASM_WRITTEN (type) = 1; |
4b5d70fd | 14680 | gen_decl_die (TYPE_NAME (type), NULL, context_die); |
6efd403b | 14681 | return; |
14682 | } | |
14683 | ||
1c79cc8c | 14684 | /* If this is an array type with hidden descriptor, handle it first. */ |
14685 | if (!TREE_ASM_WRITTEN (type) | |
14686 | && lang_hooks.types.get_array_descr_info | |
14687 | && lang_hooks.types.get_array_descr_info (type, &info)) | |
14688 | { | |
14689 | gen_descr_array_type_die (type, &info, context_die); | |
14690 | TREE_ASM_WRITTEN (type) = 1; | |
14691 | return; | |
14692 | } | |
14693 | ||
dc346c40 | 14694 | /* We are going to output a DIE to represent the unqualified version |
14695 | of this type (i.e. without any const or volatile qualifiers) so | |
14696 | get the main variant (i.e. the unqualified version) of this type | |
14697 | now. (Vectors are special because the debugging info is in the | |
14698 | cloned type itself). */ | |
14699 | if (TREE_CODE (type) != VECTOR_TYPE) | |
14700 | type = type_main_variant (type); | |
14701 | ||
14702 | if (TREE_ASM_WRITTEN (type)) | |
14703 | return; | |
14704 | ||
30ade641 | 14705 | switch (TREE_CODE (type)) |
14706 | { | |
14707 | case ERROR_MARK: | |
14708 | break; | |
14709 | ||
14710 | case POINTER_TYPE: | |
14711 | case REFERENCE_TYPE: | |
ad87de1e | 14712 | /* We must set TREE_ASM_WRITTEN in case this is a recursive type. This |
14713 | ensures that the gen_type_die recursion will terminate even if the | |
14714 | type is recursive. Recursive types are possible in Ada. */ | |
14715 | /* ??? We could perhaps do this for all types before the switch | |
14716 | statement. */ | |
14717 | TREE_ASM_WRITTEN (type) = 1; | |
14718 | ||
30ade641 | 14719 | /* For these types, all that is required is that we output a DIE (or a |
c83a163c | 14720 | set of DIEs) to represent the "basis" type. */ |
0e4744ac | 14721 | gen_type_die_with_usage (TREE_TYPE (type), context_die, |
14722 | DINFO_USAGE_IND_USE); | |
30ade641 | 14723 | break; |
14724 | ||
14725 | case OFFSET_TYPE: | |
f80d1bcd | 14726 | /* This code is used for C++ pointer-to-data-member types. |
ec1e49cc | 14727 | Output a description of the relevant class type. */ |
0e4744ac | 14728 | gen_type_die_with_usage (TYPE_OFFSET_BASETYPE (type), context_die, |
14729 | DINFO_USAGE_IND_USE); | |
ec1e49cc | 14730 | |
30ade641 | 14731 | /* Output a description of the type of the object pointed to. */ |
0e4744ac | 14732 | gen_type_die_with_usage (TREE_TYPE (type), context_die, |
14733 | DINFO_USAGE_IND_USE); | |
ec1e49cc | 14734 | |
30ade641 | 14735 | /* Now output a DIE to represent this pointer-to-data-member type |
c83a163c | 14736 | itself. */ |
30ade641 | 14737 | gen_ptr_to_mbr_type_die (type, context_die); |
14738 | break; | |
14739 | ||
30ade641 | 14740 | case FUNCTION_TYPE: |
14741 | /* Force out return type (in case it wasn't forced out already). */ | |
0e4744ac | 14742 | gen_type_die_with_usage (TREE_TYPE (type), context_die, |
14743 | DINFO_USAGE_DIR_USE); | |
30ade641 | 14744 | gen_subroutine_type_die (type, context_die); |
14745 | break; | |
14746 | ||
14747 | case METHOD_TYPE: | |
14748 | /* Force out return type (in case it wasn't forced out already). */ | |
0e4744ac | 14749 | gen_type_die_with_usage (TREE_TYPE (type), context_die, |
14750 | DINFO_USAGE_DIR_USE); | |
30ade641 | 14751 | gen_subroutine_type_die (type, context_die); |
14752 | break; | |
14753 | ||
14754 | case ARRAY_TYPE: | |
63bf54cf | 14755 | gen_array_type_die (type, context_die); |
30ade641 | 14756 | break; |
14757 | ||
e2ea7e3a | 14758 | case VECTOR_TYPE: |
634906d6 | 14759 | gen_array_type_die (type, context_die); |
e2ea7e3a | 14760 | break; |
14761 | ||
30ade641 | 14762 | case ENUMERAL_TYPE: |
14763 | case RECORD_TYPE: | |
14764 | case UNION_TYPE: | |
14765 | case QUAL_UNION_TYPE: | |
8c3f468d | 14766 | /* If this is a nested type whose containing class hasn't been written |
c83a163c | 14767 | out yet, writing it out will cover this one, too. This does not apply |
14768 | to instantiations of member class templates; they need to be added to | |
14769 | the containing class as they are generated. FIXME: This hurts the | |
14770 | idea of combining type decls from multiple TUs, since we can't predict | |
14771 | what set of template instantiations we'll get. */ | |
a3377a8b | 14772 | if (TYPE_CONTEXT (type) |
5ef8d04d | 14773 | && AGGREGATE_TYPE_P (TYPE_CONTEXT (type)) |
a3377a8b | 14774 | && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type))) |
6efd403b | 14775 | { |
0e4744ac | 14776 | gen_type_die_with_usage (TYPE_CONTEXT (type), context_die, usage); |
6efd403b | 14777 | |
5c65b85a | 14778 | if (TREE_ASM_WRITTEN (type)) |
6efd403b | 14779 | return; |
14780 | ||
14781 | /* If that failed, attach ourselves to the stub. */ | |
14782 | push_decl_scope (TYPE_CONTEXT (type)); | |
14783 | context_die = lookup_type_die (TYPE_CONTEXT (type)); | |
5c65b85a | 14784 | need_pop = 1; |
6efd403b | 14785 | } |
5c65b85a | 14786 | else |
e89530cd | 14787 | { |
df4d540f | 14788 | context_die = declare_in_namespace (type, context_die); |
e89530cd | 14789 | need_pop = 0; |
14790 | } | |
6efd403b | 14791 | |
14792 | if (TREE_CODE (type) == ENUMERAL_TYPE) | |
3d9b511b | 14793 | { |
14794 | /* This might have been written out by the call to | |
14795 | declare_in_namespace. */ | |
14796 | if (!TREE_ASM_WRITTEN (type)) | |
14797 | gen_enumeration_type_die (type, context_die); | |
14798 | } | |
30ade641 | 14799 | else |
0e4744ac | 14800 | gen_struct_or_union_type_die (type, context_die, usage); |
752e49ca | 14801 | |
5c65b85a | 14802 | if (need_pop) |
6efd403b | 14803 | pop_decl_scope (); |
14804 | ||
752e49ca | 14805 | /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix |
a3377a8b | 14806 | it up if it is ever completed. gen_*_type_die will set it for us |
14807 | when appropriate. */ | |
14808 | return; | |
30ade641 | 14809 | |
14810 | case VOID_TYPE: | |
14811 | case INTEGER_TYPE: | |
14812 | case REAL_TYPE: | |
06f0b99c | 14813 | case FIXED_POINT_TYPE: |
30ade641 | 14814 | case COMPLEX_TYPE: |
14815 | case BOOLEAN_TYPE: | |
30ade641 | 14816 | /* No DIEs needed for fundamental types. */ |
14817 | break; | |
14818 | ||
14819 | case LANG_TYPE: | |
14820 | /* No Dwarf representation currently defined. */ | |
14821 | break; | |
14822 | ||
14823 | default: | |
7bd4f6b6 | 14824 | gcc_unreachable (); |
30ade641 | 14825 | } |
14826 | ||
14827 | TREE_ASM_WRITTEN (type) = 1; | |
14828 | } | |
14829 | ||
0e4744ac | 14830 | static void |
14831 | gen_type_die (tree type, dw_die_ref context_die) | |
14832 | { | |
14833 | gen_type_die_with_usage (type, context_die, DINFO_USAGE_DIR_USE); | |
14834 | } | |
14835 | ||
30ade641 | 14836 | /* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the |
14837 | things which are local to the given block. */ | |
ec1e49cc | 14838 | |
30ade641 | 14839 | static void |
8ec3a57b | 14840 | gen_block_die (tree stmt, dw_die_ref context_die, int depth) |
30ade641 | 14841 | { |
19cb6b50 | 14842 | int must_output_die = 0; |
cee43f7e | 14843 | bool inlined_func; |
30ade641 | 14844 | |
7c0a8197 | 14845 | /* Ignore blocks that are NULL. */ |
14846 | if (stmt == NULL_TREE) | |
ec1e49cc | 14847 | return; |
30ade641 | 14848 | |
cee43f7e | 14849 | inlined_func = inlined_function_outer_scope_p (stmt); |
14850 | ||
a36145ca | 14851 | /* If the block is one fragment of a non-contiguous block, do not |
14852 | process the variables, since they will have been done by the | |
14853 | origin block. Do process subblocks. */ | |
14854 | if (BLOCK_FRAGMENT_ORIGIN (stmt)) | |
14855 | { | |
14856 | tree sub; | |
14857 | ||
8c3f468d | 14858 | for (sub = BLOCK_SUBBLOCKS (stmt); sub; sub = BLOCK_CHAIN (sub)) |
a36145ca | 14859 | gen_block_die (sub, context_die, depth + 1); |
8c3f468d | 14860 | |
a36145ca | 14861 | return; |
14862 | } | |
14863 | ||
30ade641 | 14864 | /* Determine if we need to output any Dwarf DIEs at all to represent this |
14865 | block. */ | |
cee43f7e | 14866 | if (inlined_func) |
ec1e49cc | 14867 | /* The outer scopes for inlinings *must* always be represented. We |
14868 | generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */ | |
14869 | must_output_die = 1; | |
30ade641 | 14870 | else |
14871 | { | |
cee43f7e | 14872 | /* Determine if this block directly contains any "significant" |
14873 | local declarations which we will need to output DIEs for. */ | |
14874 | if (debug_info_level > DINFO_LEVEL_TERSE) | |
14875 | /* We are not in terse mode so *any* local declaration counts | |
14876 | as being a "significant" one. */ | |
4b5d70fd | 14877 | must_output_die = ((BLOCK_VARS (stmt) != NULL |
14878 | || BLOCK_NUM_NONLOCALIZED_VARS (stmt)) | |
cee43f7e | 14879 | && (TREE_USED (stmt) |
14880 | || TREE_ASM_WRITTEN (stmt) | |
14881 | || BLOCK_ABSTRACT (stmt))); | |
4b5d70fd | 14882 | else if ((TREE_USED (stmt) |
14883 | || TREE_ASM_WRITTEN (stmt) | |
14884 | || BLOCK_ABSTRACT (stmt)) | |
14885 | && !dwarf2out_ignore_block (stmt)) | |
14886 | must_output_die = 1; | |
30ade641 | 14887 | } |
14888 | ||
14889 | /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block | |
14890 | DIE for any block which contains no significant local declarations at | |
14891 | all. Rather, in such cases we just call `decls_for_scope' so that any | |
14892 | needed Dwarf info for any sub-blocks will get properly generated. Note | |
14893 | that in terse mode, our definition of what constitutes a "significant" | |
14894 | local declaration gets restricted to include only inlined function | |
14895 | instances and local (nested) function definitions. */ | |
14896 | if (must_output_die) | |
14897 | { | |
cee43f7e | 14898 | if (inlined_func) |
ec1e49cc | 14899 | gen_inlined_subroutine_die (stmt, context_die, depth); |
30ade641 | 14900 | else |
ec1e49cc | 14901 | gen_lexical_block_die (stmt, context_die, depth); |
30ade641 | 14902 | } |
14903 | else | |
cb371216 | 14904 | decls_for_scope (stmt, context_die, depth); |
30ade641 | 14905 | } |
14906 | ||
4b5d70fd | 14907 | /* Process variable DECL (or variable with origin ORIGIN) within |
14908 | block STMT and add it to CONTEXT_DIE. */ | |
14909 | static void | |
14910 | process_scope_var (tree stmt, tree decl, tree origin, dw_die_ref context_die) | |
14911 | { | |
14912 | dw_die_ref die; | |
14913 | tree decl_or_origin = decl ? decl : origin; | |
14914 | tree ultimate_origin = origin ? decl_ultimate_origin (origin) : NULL; | |
14915 | ||
14916 | if (ultimate_origin) | |
14917 | origin = ultimate_origin; | |
14918 | ||
14919 | if (TREE_CODE (decl_or_origin) == FUNCTION_DECL) | |
14920 | die = lookup_decl_die (decl_or_origin); | |
14921 | else if (TREE_CODE (decl_or_origin) == TYPE_DECL | |
14922 | && TYPE_DECL_IS_STUB (decl_or_origin)) | |
14923 | die = lookup_type_die (TREE_TYPE (decl_or_origin)); | |
14924 | else | |
14925 | die = NULL; | |
14926 | ||
14927 | if (die != NULL && die->die_parent == NULL) | |
14928 | add_child_die (context_die, die); | |
14929 | else if (TREE_CODE (decl_or_origin) == IMPORTED_DECL) | |
14930 | dwarf2out_imported_module_or_decl_1 (decl_or_origin, DECL_NAME (decl_or_origin), | |
14931 | stmt, context_die); | |
14932 | else | |
14933 | gen_decl_die (decl, origin, context_die); | |
14934 | } | |
14935 | ||
30ade641 | 14936 | /* Generate all of the decls declared within a given scope and (recursively) |
9e042f31 | 14937 | all of its sub-blocks. */ |
ec1e49cc | 14938 | |
30ade641 | 14939 | static void |
8ec3a57b | 14940 | decls_for_scope (tree stmt, dw_die_ref context_die, int depth) |
30ade641 | 14941 | { |
19cb6b50 | 14942 | tree decl; |
4b5d70fd | 14943 | unsigned int i; |
19cb6b50 | 14944 | tree subblocks; |
ec1e49cc | 14945 | |
7c0a8197 | 14946 | /* Ignore NULL blocks. */ |
14947 | if (stmt == NULL_TREE) | |
ec1e49cc | 14948 | return; |
14949 | ||
4b5d70fd | 14950 | /* Output the DIEs to represent all of the data objects and typedefs |
14951 | declared directly within this block but not within any nested | |
14952 | sub-blocks. Also, nested function and tag DIEs have been | |
14953 | generated with a parent of NULL; fix that up now. */ | |
14954 | for (decl = BLOCK_VARS (stmt); decl != NULL; decl = TREE_CHAIN (decl)) | |
14955 | process_scope_var (stmt, decl, NULL_TREE, context_die); | |
14956 | for (i = 0; i < BLOCK_NUM_NONLOCALIZED_VARS (stmt); i++) | |
14957 | process_scope_var (stmt, NULL, BLOCK_NONLOCALIZED_VAR (stmt, i), | |
14958 | context_die); | |
30ade641 | 14959 | |
e883780d | 14960 | /* If we're at -g1, we're not interested in subblocks. */ |
14961 | if (debug_info_level <= DINFO_LEVEL_TERSE) | |
14962 | return; | |
14963 | ||
30ade641 | 14964 | /* Output the DIEs to represent all sub-blocks (and the items declared |
14965 | therein) of this block. */ | |
14966 | for (subblocks = BLOCK_SUBBLOCKS (stmt); | |
14967 | subblocks != NULL; | |
14968 | subblocks = BLOCK_CHAIN (subblocks)) | |
ec1e49cc | 14969 | gen_block_die (subblocks, context_die, depth + 1); |
30ade641 | 14970 | } |
14971 | ||
6efd403b | 14972 | /* Is this a typedef we can avoid emitting? */ |
ec1e49cc | 14973 | |
14974 | static inline int | |
5493cb9a | 14975 | is_redundant_typedef (const_tree decl) |
6efd403b | 14976 | { |
14977 | if (TYPE_DECL_IS_STUB (decl)) | |
14978 | return 1; | |
ec1e49cc | 14979 | |
6efd403b | 14980 | if (DECL_ARTIFICIAL (decl) |
14981 | && DECL_CONTEXT (decl) | |
14982 | && is_tagged_type (DECL_CONTEXT (decl)) | |
14983 | && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl))) == TYPE_DECL | |
14984 | && DECL_NAME (decl) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl)))) | |
14985 | /* Also ignore the artificial member typedef for the class name. */ | |
14986 | return 1; | |
ec1e49cc | 14987 | |
6efd403b | 14988 | return 0; |
14989 | } | |
14990 | ||
01d2a17d | 14991 | /* Returns the DIE for a context. */ |
14992 | ||
14993 | static inline dw_die_ref | |
14994 | get_context_die (tree context) | |
14995 | { | |
14996 | if (context) | |
14997 | { | |
14998 | /* Find die that represents this context. */ | |
14999 | if (TYPE_P (context)) | |
15000 | return force_type_die (context); | |
15001 | else | |
15002 | return force_decl_die (context); | |
15003 | } | |
15004 | return comp_unit_die; | |
15005 | } | |
15006 | ||
89f18f73 | 15007 | /* Returns the DIE for decl. A DIE will always be returned. */ |
2b49746a | 15008 | |
15009 | static dw_die_ref | |
15010 | force_decl_die (tree decl) | |
15011 | { | |
15012 | dw_die_ref decl_die; | |
15013 | unsigned saved_external_flag; | |
15014 | tree save_fn = NULL_TREE; | |
15015 | decl_die = lookup_decl_die (decl); | |
15016 | if (!decl_die) | |
15017 | { | |
01d2a17d | 15018 | dw_die_ref context_die = get_context_die (DECL_CONTEXT (decl)); |
2b49746a | 15019 | |
dcfa82ba | 15020 | decl_die = lookup_decl_die (decl); |
15021 | if (decl_die) | |
15022 | return decl_die; | |
15023 | ||
2b49746a | 15024 | switch (TREE_CODE (decl)) |
15025 | { | |
15026 | case FUNCTION_DECL: | |
15027 | /* Clear current_function_decl, so that gen_subprogram_die thinks | |
15028 | that this is a declaration. At this point, we just want to force | |
15029 | declaration die. */ | |
15030 | save_fn = current_function_decl; | |
15031 | current_function_decl = NULL_TREE; | |
15032 | gen_subprogram_die (decl, context_die); | |
8ff30ff6 | 15033 | current_function_decl = save_fn; |
2b49746a | 15034 | break; |
15035 | ||
15036 | case VAR_DECL: | |
15037 | /* Set external flag to force declaration die. Restore it after | |
15038 | gen_decl_die() call. */ | |
15039 | saved_external_flag = DECL_EXTERNAL (decl); | |
15040 | DECL_EXTERNAL (decl) = 1; | |
4b5d70fd | 15041 | gen_decl_die (decl, NULL, context_die); |
2b49746a | 15042 | DECL_EXTERNAL (decl) = saved_external_flag; |
15043 | break; | |
15044 | ||
15045 | case NAMESPACE_DECL: | |
15046 | dwarf2out_decl (decl); | |
15047 | break; | |
15048 | ||
15049 | default: | |
7bd4f6b6 | 15050 | gcc_unreachable (); |
2b49746a | 15051 | } |
8ff30ff6 | 15052 | |
89f18f73 | 15053 | /* We should be able to find the DIE now. */ |
2b49746a | 15054 | if (!decl_die) |
15055 | decl_die = lookup_decl_die (decl); | |
7bd4f6b6 | 15056 | gcc_assert (decl_die); |
2b49746a | 15057 | } |
8ff30ff6 | 15058 | |
2b49746a | 15059 | return decl_die; |
15060 | } | |
e89530cd | 15061 | |
a357c7c2 | 15062 | /* Returns the DIE for TYPE, that must not be a base type. A DIE is |
15063 | always returned. */ | |
e89530cd | 15064 | |
15065 | static dw_die_ref | |
2b49746a | 15066 | force_type_die (tree type) |
e89530cd | 15067 | { |
2b49746a | 15068 | dw_die_ref type_die; |
e89530cd | 15069 | |
eb550b19 | 15070 | type_die = lookup_type_die (type); |
2b49746a | 15071 | if (!type_die) |
15072 | { | |
01d2a17d | 15073 | dw_die_ref context_die = get_context_die (TYPE_CONTEXT (type)); |
e89530cd | 15074 | |
f4aea3f4 | 15075 | type_die = modified_type_die (type, TYPE_READONLY (type), |
15076 | TYPE_VOLATILE (type), context_die); | |
7bd4f6b6 | 15077 | gcc_assert (type_die); |
2b49746a | 15078 | } |
15079 | return type_die; | |
e89530cd | 15080 | } |
15081 | ||
15082 | /* Force out any required namespaces to be able to output DECL, | |
15083 | and return the new context_die for it, if it's changed. */ | |
15084 | ||
15085 | static dw_die_ref | |
15086 | setup_namespace_context (tree thing, dw_die_ref context_die) | |
15087 | { | |
ce45a448 | 15088 | tree context = (DECL_P (thing) |
15089 | ? DECL_CONTEXT (thing) : TYPE_CONTEXT (thing)); | |
e89530cd | 15090 | if (context && TREE_CODE (context) == NAMESPACE_DECL) |
8b332087 | 15091 | /* Force out the namespace. */ |
2b49746a | 15092 | context_die = force_decl_die (context); |
e89530cd | 15093 | |
15094 | return context_die; | |
15095 | } | |
15096 | ||
15097 | /* Emit a declaration DIE for THING (which is either a DECL or a tagged | |
15098 | type) within its namespace, if appropriate. | |
15099 | ||
15100 | For compatibility with older debuggers, namespace DIEs only contain | |
15101 | declarations; all definitions are emitted at CU scope. */ | |
15102 | ||
df4d540f | 15103 | static dw_die_ref |
e89530cd | 15104 | declare_in_namespace (tree thing, dw_die_ref context_die) |
15105 | { | |
15106 | dw_die_ref ns_context; | |
15107 | ||
15108 | if (debug_info_level <= DINFO_LEVEL_TERSE) | |
df4d540f | 15109 | return context_die; |
e89530cd | 15110 | |
d799a629 | 15111 | /* If this decl is from an inlined function, then don't try to emit it in its |
15112 | namespace, as we will get confused. It would have already been emitted | |
15113 | when the abstract instance of the inline function was emitted anyways. */ | |
15114 | if (DECL_P (thing) && DECL_ABSTRACT_ORIGIN (thing)) | |
df4d540f | 15115 | return context_die; |
d799a629 | 15116 | |
e89530cd | 15117 | ns_context = setup_namespace_context (thing, context_die); |
15118 | ||
15119 | if (ns_context != context_die) | |
15120 | { | |
df4d540f | 15121 | if (is_fortran ()) |
15122 | return ns_context; | |
e89530cd | 15123 | if (DECL_P (thing)) |
4b5d70fd | 15124 | gen_decl_die (thing, NULL, ns_context); |
e89530cd | 15125 | else |
15126 | gen_type_die (thing, ns_context); | |
15127 | } | |
df4d540f | 15128 | return context_die; |
e89530cd | 15129 | } |
15130 | ||
8b332087 | 15131 | /* Generate a DIE for a namespace or namespace alias. */ |
e89530cd | 15132 | |
15133 | static void | |
4b1ab129 | 15134 | gen_namespace_die (tree decl, dw_die_ref context_die) |
e89530cd | 15135 | { |
4b1ab129 | 15136 | dw_die_ref namespace_die; |
e89530cd | 15137 | |
15138 | /* Namespace aliases have a DECL_ABSTRACT_ORIGIN of the namespace | |
21dda4ee | 15139 | they are an alias of. */ |
e89530cd | 15140 | if (DECL_ABSTRACT_ORIGIN (decl) == NULL) |
15141 | { | |
302e9fd3 | 15142 | /* Output a real namespace or module. */ |
4b1ab129 | 15143 | context_die = setup_namespace_context (decl, comp_unit_die); |
15144 | namespace_die = new_die (is_fortran () | |
15145 | ? DW_TAG_module : DW_TAG_namespace, | |
15146 | context_die, decl); | |
302e9fd3 | 15147 | /* For Fortran modules defined in different CU don't add src coords. */ |
15148 | if (namespace_die->die_tag == DW_TAG_module && DECL_EXTERNAL (decl)) | |
15149 | add_name_attribute (namespace_die, dwarf2_name (decl, 0)); | |
15150 | else | |
15151 | add_name_and_src_coords_attributes (namespace_die, decl); | |
df4d540f | 15152 | if (DECL_EXTERNAL (decl)) |
15153 | add_AT_flag (namespace_die, DW_AT_declaration, 1); | |
e89530cd | 15154 | equate_decl_number_to_die (decl, namespace_die); |
15155 | } | |
15156 | else | |
15157 | { | |
8b332087 | 15158 | /* Output a namespace alias. */ |
e89530cd | 15159 | |
8b332087 | 15160 | /* Force out the namespace we are an alias of, if necessary. */ |
e89530cd | 15161 | dw_die_ref origin_die |
2b49746a | 15162 | = force_decl_die (DECL_ABSTRACT_ORIGIN (decl)); |
e89530cd | 15163 | |
4b1ab129 | 15164 | if (DECL_CONTEXT (decl) == NULL_TREE |
15165 | || TREE_CODE (DECL_CONTEXT (decl)) == NAMESPACE_DECL) | |
15166 | context_die = setup_namespace_context (decl, comp_unit_die); | |
8b332087 | 15167 | /* Now create the namespace alias DIE. */ |
4b1ab129 | 15168 | namespace_die = new_die (DW_TAG_imported_declaration, context_die, decl); |
e89530cd | 15169 | add_name_and_src_coords_attributes (namespace_die, decl); |
15170 | add_AT_die_ref (namespace_die, DW_AT_import, origin_die); | |
15171 | equate_decl_number_to_die (decl, namespace_die); | |
15172 | } | |
15173 | } | |
15174 | ||
30ade641 | 15175 | /* Generate Dwarf debug information for a decl described by DECL. */ |
ec1e49cc | 15176 | |
30ade641 | 15177 | static void |
4b5d70fd | 15178 | gen_decl_die (tree decl, tree origin, dw_die_ref context_die) |
30ade641 | 15179 | { |
4b5d70fd | 15180 | tree decl_or_origin = decl ? decl : origin; |
15181 | tree class_origin = NULL; | |
ec1e49cc | 15182 | |
4b5d70fd | 15183 | if (DECL_P (decl_or_origin) && DECL_IGNORED_P (decl_or_origin)) |
ec1e49cc | 15184 | return; |
30ade641 | 15185 | |
4b5d70fd | 15186 | switch (TREE_CODE (decl_or_origin)) |
30ade641 | 15187 | { |
8c3f468d | 15188 | case ERROR_MARK: |
15189 | break; | |
15190 | ||
30ade641 | 15191 | case CONST_DECL: |
2eb674c9 | 15192 | if (!is_fortran ()) |
15193 | { | |
15194 | /* The individual enumerators of an enum type get output when we output | |
15195 | the Dwarf representation of the relevant enum type itself. */ | |
15196 | break; | |
15197 | } | |
15198 | ||
15199 | /* Emit its type. */ | |
15200 | gen_type_die (TREE_TYPE (decl), context_die); | |
15201 | ||
15202 | /* And its containing namespace. */ | |
15203 | context_die = declare_in_namespace (decl, context_die); | |
15204 | ||
15205 | gen_const_die (decl, context_die); | |
30ade641 | 15206 | break; |
15207 | ||
15208 | case FUNCTION_DECL: | |
cc324702 | 15209 | /* Don't output any DIEs to represent mere function declarations, |
15210 | unless they are class members or explicit block externs. */ | |
4b5d70fd | 15211 | if (DECL_INITIAL (decl_or_origin) == NULL_TREE |
15212 | && DECL_CONTEXT (decl_or_origin) == NULL_TREE | |
15213 | && (current_function_decl == NULL_TREE | |
15214 | || DECL_ARTIFICIAL (decl_or_origin))) | |
ec1e49cc | 15215 | break; |
6ed29fb8 | 15216 | |
4ee9c684 | 15217 | #if 0 |
15218 | /* FIXME */ | |
15219 | /* This doesn't work because the C frontend sets DECL_ABSTRACT_ORIGIN | |
15220 | on local redeclarations of global functions. That seems broken. */ | |
15221 | if (current_function_decl != decl) | |
15222 | /* This is only a declaration. */; | |
15223 | #endif | |
15224 | ||
8f80e66d | 15225 | /* If we're emitting a clone, emit info for the abstract instance. */ |
4b5d70fd | 15226 | if (origin || DECL_ORIGIN (decl) != decl) |
15227 | dwarf2out_abstract_function (origin ? origin : DECL_ABSTRACT_ORIGIN (decl)); | |
8c3f468d | 15228 | |
0dbc398a | 15229 | /* If we're emitting an out-of-line copy of an inline function, |
15230 | emit info for the abstract instance and set up to refer to it. */ | |
5bd74231 | 15231 | else if (cgraph_function_possibly_inlined_p (decl) |
15232 | && ! DECL_ABSTRACT (decl) | |
e89530cd | 15233 | && ! class_or_namespace_scope_p (context_die) |
8f80e66d | 15234 | /* dwarf2out_abstract_function won't emit a die if this is just |
15235 | a declaration. We must avoid setting DECL_ABSTRACT_ORIGIN in | |
15236 | that case, because that works only if we have a die. */ | |
15237 | && DECL_INITIAL (decl) != NULL_TREE) | |
0dbc398a | 15238 | { |
f414ade2 | 15239 | dwarf2out_abstract_function (decl); |
0dbc398a | 15240 | set_decl_origin_self (decl); |
15241 | } | |
8c3f468d | 15242 | |
8f80e66d | 15243 | /* Otherwise we're emitting the primary DIE for this decl. */ |
15244 | else if (debug_info_level > DINFO_LEVEL_TERSE) | |
6efd403b | 15245 | { |
15246 | /* Before we describe the FUNCTION_DECL itself, make sure that we | |
15247 | have described its return type. */ | |
15248 | gen_type_die (TREE_TYPE (TREE_TYPE (decl)), context_die); | |
15249 | ||
5134c73b | 15250 | /* And its virtual context. */ |
15251 | if (DECL_VINDEX (decl) != NULL_TREE) | |
15252 | gen_type_die (DECL_CONTEXT (decl), context_die); | |
15253 | ||
6efd403b | 15254 | /* And its containing type. */ |
4b5d70fd | 15255 | if (!origin) |
15256 | origin = decl_class_context (decl); | |
ec1e49cc | 15257 | if (origin != NULL_TREE) |
e7b3c55c | 15258 | gen_type_die_for_member (origin, decl, context_die); |
e89530cd | 15259 | |
15260 | /* And its containing namespace. */ | |
df4d540f | 15261 | context_die = declare_in_namespace (decl, context_die); |
6efd403b | 15262 | } |
30ade641 | 15263 | |
15264 | /* Now output a DIE to represent the function itself. */ | |
4b5d70fd | 15265 | if (decl) |
15266 | gen_subprogram_die (decl, context_die); | |
30ade641 | 15267 | break; |
15268 | ||
15269 | case TYPE_DECL: | |
15270 | /* If we are in terse mode, don't generate any DIEs to represent any | |
c83a163c | 15271 | actual typedefs. */ |
30ade641 | 15272 | if (debug_info_level <= DINFO_LEVEL_TERSE) |
43f116ae | 15273 | break; |
30ade641 | 15274 | |
8c3f468d | 15275 | /* In the special case of a TYPE_DECL node representing the declaration |
c83a163c | 15276 | of some type tag, if the given TYPE_DECL is marked as having been |
15277 | instantiated from some other (original) TYPE_DECL node (e.g. one which | |
15278 | was generated within the original definition of an inline function) we | |
31334434 | 15279 | used to generate a special (abbreviated) DW_TAG_structure_type, |
15280 | DW_TAG_union_type, or DW_TAG_enumeration_type DIE here. But nothing | |
15281 | should be actually referencing those DIEs, as variable DIEs with that | |
15282 | type would be emitted already in the abstract origin, so it was always | |
15283 | removed during unused type prunning. Don't add anything in this | |
15284 | case. */ | |
15285 | if (TYPE_DECL_IS_STUB (decl) && decl_ultimate_origin (decl) != NULL_TREE) | |
15286 | break; | |
30ade641 | 15287 | |
6efd403b | 15288 | if (is_redundant_typedef (decl)) |
15289 | gen_type_die (TREE_TYPE (decl), context_die); | |
15290 | else | |
ec1e49cc | 15291 | /* Output a DIE to represent the typedef itself. */ |
15292 | gen_typedef_die (decl, context_die); | |
30ade641 | 15293 | break; |
15294 | ||
15295 | case LABEL_DECL: | |
15296 | if (debug_info_level >= DINFO_LEVEL_NORMAL) | |
ec1e49cc | 15297 | gen_label_die (decl, context_die); |
30ade641 | 15298 | break; |
15299 | ||
15300 | case VAR_DECL: | |
4ee9c684 | 15301 | case RESULT_DECL: |
30ade641 | 15302 | /* If we are in terse mode, don't generate any DIEs to represent any |
c83a163c | 15303 | variable declarations or definitions. */ |
30ade641 | 15304 | if (debug_info_level <= DINFO_LEVEL_TERSE) |
ec1e49cc | 15305 | break; |
30ade641 | 15306 | |
15307 | /* Output any DIEs that are needed to specify the type of this data | |
c83a163c | 15308 | object. */ |
1095d222 | 15309 | if ((TREE_CODE (decl_or_origin) == RESULT_DECL |
15310 | || (TREE_CODE (decl_or_origin) == VAR_DECL | |
15311 | && !TREE_STATIC (decl_or_origin))) | |
4b5d70fd | 15312 | && DECL_BY_REFERENCE (decl_or_origin)) |
15313 | gen_type_die (TREE_TYPE (TREE_TYPE (decl_or_origin)), context_die); | |
73bcd2ba | 15314 | else |
4b5d70fd | 15315 | gen_type_die (TREE_TYPE (decl_or_origin), context_die); |
30ade641 | 15316 | |
6efd403b | 15317 | /* And its containing type. */ |
4b5d70fd | 15318 | class_origin = decl_class_context (decl_or_origin); |
15319 | if (class_origin != NULL_TREE) | |
15320 | gen_type_die_for_member (class_origin, decl_or_origin, context_die); | |
6efd403b | 15321 | |
e89530cd | 15322 | /* And its containing namespace. */ |
4b5d70fd | 15323 | context_die = declare_in_namespace (decl_or_origin, context_die); |
e89530cd | 15324 | |
30ade641 | 15325 | /* Now output the DIE to represent the data object itself. This gets |
c83a163c | 15326 | complicated because of the possibility that the VAR_DECL really |
15327 | represents an inlined instance of a formal parameter for an inline | |
15328 | function. */ | |
4b5d70fd | 15329 | if (!origin) |
15330 | origin = decl_ultimate_origin (decl); | |
ec1e49cc | 15331 | if (origin != NULL_TREE && TREE_CODE (origin) == PARM_DECL) |
4b5d70fd | 15332 | gen_formal_parameter_die (decl, origin, context_die); |
30ade641 | 15333 | else |
4b5d70fd | 15334 | gen_variable_die (decl, origin, context_die); |
30ade641 | 15335 | break; |
15336 | ||
15337 | case FIELD_DECL: | |
8c3f468d | 15338 | /* Ignore the nameless fields that are used to skip bits but handle C++ |
dbb28acc | 15339 | anonymous unions and structs. */ |
ec1e49cc | 15340 | if (DECL_NAME (decl) != NULL_TREE |
dbb28acc | 15341 | || TREE_CODE (TREE_TYPE (decl)) == UNION_TYPE |
15342 | || TREE_CODE (TREE_TYPE (decl)) == RECORD_TYPE) | |
30ade641 | 15343 | { |
15344 | gen_type_die (member_declared_type (decl), context_die); | |
15345 | gen_field_die (decl, context_die); | |
15346 | } | |
15347 | break; | |
15348 | ||
15349 | case PARM_DECL: | |
4b5d70fd | 15350 | if (DECL_BY_REFERENCE (decl_or_origin)) |
15351 | gen_type_die (TREE_TYPE (TREE_TYPE (decl_or_origin)), context_die); | |
73bcd2ba | 15352 | else |
4b5d70fd | 15353 | gen_type_die (TREE_TYPE (decl_or_origin), context_die); |
15354 | gen_formal_parameter_die (decl, origin, context_die); | |
30ade641 | 15355 | break; |
15356 | ||
5c65b85a | 15357 | case NAMESPACE_DECL: |
5d8a39b7 | 15358 | case IMPORTED_DECL: |
4b1ab129 | 15359 | gen_namespace_die (decl, context_die); |
5c65b85a | 15360 | break; |
15361 | ||
30ade641 | 15362 | default: |
7bd4f6b6 | 15363 | /* Probably some frontend-internal decl. Assume we don't care. */ |
15364 | gcc_assert ((int)TREE_CODE (decl) > NUM_TREE_CODES); | |
15365 | break; | |
30ade641 | 15366 | } |
30ade641 | 15367 | } |
15368 | \f | |
8c3f468d | 15369 | /* Output debug information for global decl DECL. Called from toplev.c after |
c37d72e9 | 15370 | compilation proper has finished. */ |
8c3f468d | 15371 | |
c37d72e9 | 15372 | static void |
8ec3a57b | 15373 | dwarf2out_global_decl (tree decl) |
c37d72e9 | 15374 | { |
15375 | /* Output DWARF2 information for file-scope tentative data object | |
39c7766b | 15376 | declarations, file-scope (extern) function declarations (which |
15377 | had no corresponding body) and file-scope tagged type declarations | |
df4d540f | 15378 | and definitions which have not yet been forced out. */ |
c37d72e9 | 15379 | if (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)) |
15380 | dwarf2out_decl (decl); | |
15381 | } | |
15382 | ||
73ae3ef7 | 15383 | /* Output debug information for type decl DECL. Called from toplev.c |
15384 | and from language front ends (to record built-in types). */ | |
15385 | static void | |
15386 | dwarf2out_type_decl (tree decl, int local) | |
15387 | { | |
15388 | if (!local) | |
15389 | dwarf2out_decl (decl); | |
15390 | } | |
15391 | ||
df4d540f | 15392 | /* Output debug information for imported module or decl DECL. |
5d8a39b7 | 15393 | NAME is non-NULL name in the lexical block if the decl has been renamed. |
15394 | LEXICAL_BLOCK is the lexical block (which TREE_CODE is a BLOCK) | |
15395 | that DECL belongs to. | |
15396 | LEXICAL_BLOCK_DIE is the DIE of LEXICAL_BLOCK. */ | |
2b49746a | 15397 | static void |
5d8a39b7 | 15398 | dwarf2out_imported_module_or_decl_1 (tree decl, |
15399 | tree name, | |
15400 | tree lexical_block, | |
15401 | dw_die_ref lexical_block_die) | |
2b49746a | 15402 | { |
7bd3dcc4 | 15403 | expanded_location xloc; |
5d8a39b7 | 15404 | dw_die_ref imported_die = NULL; |
15405 | dw_die_ref at_import_die; | |
8ff30ff6 | 15406 | |
169f8686 | 15407 | if (TREE_CODE (decl) == IMPORTED_DECL) |
15408 | { | |
15409 | xloc = expand_location (DECL_SOURCE_LOCATION (decl)); | |
15410 | decl = IMPORTED_DECL_ASSOCIATED_DECL (decl); | |
15411 | gcc_assert (decl); | |
15412 | } | |
15413 | else | |
15414 | xloc = expand_location (input_location); | |
15415 | ||
cdcf9499 | 15416 | if (TREE_CODE (decl) == TYPE_DECL || TREE_CODE (decl) == CONST_DECL) |
a357c7c2 | 15417 | { |
15418 | if (is_base_type (TREE_TYPE (decl))) | |
15419 | at_import_die = base_type_die (TREE_TYPE (decl)); | |
15420 | else | |
15421 | at_import_die = force_type_die (TREE_TYPE (decl)); | |
01d2a17d | 15422 | /* For namespace N { typedef void T; } using N::T; base_type_die |
15423 | returns NULL, but DW_TAG_imported_declaration requires | |
15424 | the DW_AT_import tag. Force creation of DW_TAG_typedef. */ | |
15425 | if (!at_import_die) | |
15426 | { | |
15427 | gcc_assert (TREE_CODE (decl) == TYPE_DECL); | |
15428 | gen_typedef_die (decl, get_context_die (DECL_CONTEXT (decl))); | |
15429 | at_import_die = lookup_type_die (TREE_TYPE (decl)); | |
15430 | gcc_assert (at_import_die); | |
15431 | } | |
a357c7c2 | 15432 | } |
2b49746a | 15433 | else |
d4946992 | 15434 | { |
15435 | at_import_die = lookup_decl_die (decl); | |
15436 | if (!at_import_die) | |
15437 | { | |
15438 | /* If we're trying to avoid duplicate debug info, we may not have | |
15439 | emitted the member decl for this field. Emit it now. */ | |
15440 | if (TREE_CODE (decl) == FIELD_DECL) | |
15441 | { | |
15442 | tree type = DECL_CONTEXT (decl); | |
d4946992 | 15443 | |
01d2a17d | 15444 | if (TYPE_CONTEXT (type) |
15445 | && TYPE_P (TYPE_CONTEXT (type)) | |
15446 | && !should_emit_struct_debug (TYPE_CONTEXT (type), | |
15447 | DINFO_USAGE_DIR_USE)) | |
15448 | return; | |
15449 | gen_type_die_for_member (type, decl, | |
15450 | get_context_die (TYPE_CONTEXT (type))); | |
d4946992 | 15451 | } |
15452 | at_import_die = force_decl_die (decl); | |
15453 | } | |
15454 | } | |
8ff30ff6 | 15455 | |
169f8686 | 15456 | if (TREE_CODE (decl) == NAMESPACE_DECL) |
5d8a39b7 | 15457 | imported_die = new_die (DW_TAG_imported_module, |
15458 | lexical_block_die, | |
15459 | lexical_block); | |
2b49746a | 15460 | else |
5d8a39b7 | 15461 | imported_die = new_die (DW_TAG_imported_declaration, |
15462 | lexical_block_die, | |
15463 | lexical_block); | |
7bd3dcc4 | 15464 | |
69278c24 | 15465 | add_AT_file (imported_die, DW_AT_decl_file, lookup_filename (xloc.file)); |
7bd3dcc4 | 15466 | add_AT_unsigned (imported_die, DW_AT_decl_line, xloc.line); |
df4d540f | 15467 | if (name) |
5d8a39b7 | 15468 | add_AT_string (imported_die, DW_AT_name, |
15469 | IDENTIFIER_POINTER (name)); | |
2b49746a | 15470 | add_AT_die_ref (imported_die, DW_AT_import, at_import_die); |
15471 | } | |
15472 | ||
5d8a39b7 | 15473 | /* Output debug information for imported module or decl DECL. |
15474 | NAME is non-NULL name in context if the decl has been renamed. | |
15475 | CHILD is true if decl is one of the renamed decls as part of | |
15476 | importing whole module. */ | |
15477 | ||
15478 | static void | |
15479 | dwarf2out_imported_module_or_decl (tree decl, tree name, tree context, | |
15480 | bool child) | |
15481 | { | |
15482 | /* dw_die_ref at_import_die; */ | |
15483 | dw_die_ref scope_die; | |
15484 | ||
15485 | if (debug_info_level <= DINFO_LEVEL_TERSE) | |
15486 | return; | |
15487 | ||
15488 | gcc_assert (decl); | |
15489 | ||
15490 | /* To emit DW_TAG_imported_module or DW_TAG_imported_decl, we need two DIEs. | |
15491 | We need decl DIE for reference and scope die. First, get DIE for the decl | |
15492 | itself. */ | |
15493 | ||
15494 | /* Get the scope die for decl context. Use comp_unit_die for global module | |
15495 | or decl. If die is not found for non globals, force new die. */ | |
15496 | if (context | |
15497 | && TYPE_P (context) | |
15498 | && !should_emit_struct_debug (context, DINFO_USAGE_DIR_USE)) | |
15499 | return; | |
15500 | scope_die = get_context_die (context); | |
15501 | ||
15502 | if (child) | |
15503 | { | |
15504 | gcc_assert (scope_die->die_child); | |
15505 | gcc_assert (scope_die->die_child->die_tag == DW_TAG_imported_module); | |
15506 | gcc_assert (TREE_CODE (decl) != NAMESPACE_DECL); | |
15507 | scope_die = scope_die->die_child; | |
15508 | } | |
15509 | ||
15510 | /* OK, now we have DIEs for decl as well as scope. Emit imported die. */ | |
15511 | dwarf2out_imported_module_or_decl_1 (decl, name, context, scope_die); | |
15512 | ||
15513 | } | |
15514 | ||
ec1e49cc | 15515 | /* Write the debugging output for DECL. */ |
15516 | ||
30ade641 | 15517 | void |
8ec3a57b | 15518 | dwarf2out_decl (tree decl) |
30ade641 | 15519 | { |
19cb6b50 | 15520 | dw_die_ref context_die = comp_unit_die; |
464217f3 | 15521 | |
30ade641 | 15522 | switch (TREE_CODE (decl)) |
15523 | { | |
8c3f468d | 15524 | case ERROR_MARK: |
15525 | return; | |
15526 | ||
30ade641 | 15527 | case FUNCTION_DECL: |
30ade641 | 15528 | /* What we would really like to do here is to filter out all mere |
c83a163c | 15529 | file-scope declarations of file-scope functions which are never |
15530 | referenced later within this translation unit (and keep all of ones | |
15531 | that *are* referenced later on) but we aren't clairvoyant, so we have | |
15532 | no idea which functions will be referenced in the future (i.e. later | |
15533 | on within the current translation unit). So here we just ignore all | |
15534 | file-scope function declarations which are not also definitions. If | |
15535 | and when the debugger needs to know something about these functions, | |
15536 | it will have to hunt around and find the DWARF information associated | |
15537 | with the definition of the function. | |
8c3f468d | 15538 | |
15539 | We can't just check DECL_EXTERNAL to find out which FUNCTION_DECL | |
c83a163c | 15540 | nodes represent definitions and which ones represent mere |
15541 | declarations. We have to check DECL_INITIAL instead. That's because | |
15542 | the C front-end supports some weird semantics for "extern inline" | |
15543 | function definitions. These can get inlined within the current | |
77aa6362 | 15544 | translation unit (and thus, we need to generate Dwarf info for their |
c83a163c | 15545 | abstract instances so that the Dwarf info for the concrete inlined |
15546 | instances can have something to refer to) but the compiler never | |
15547 | generates any out-of-lines instances of such things (despite the fact | |
15548 | that they *are* definitions). | |
8c3f468d | 15549 | |
15550 | The important point is that the C front-end marks these "extern | |
15551 | inline" functions as DECL_EXTERNAL, but we need to generate DWARF for | |
15552 | them anyway. Note that the C++ front-end also plays some similar games | |
15553 | for inline function definitions appearing within include files which | |
15554 | also contain `#pragma interface' pragmas. */ | |
30ade641 | 15555 | if (DECL_INITIAL (decl) == NULL_TREE) |
34425fdc | 15556 | return; |
464217f3 | 15557 | |
bf1e7d9a | 15558 | /* If we're a nested function, initially use a parent of NULL; if we're |
15559 | a plain function, this will be fixed up in decls_for_scope. If | |
15560 | we're a method, it will be ignored, since we already have a DIE. */ | |
e883780d | 15561 | if (decl_function_context (decl) |
15562 | /* But if we're in terse mode, we don't care about scope. */ | |
15563 | && debug_info_level > DINFO_LEVEL_TERSE) | |
bf1e7d9a | 15564 | context_die = NULL; |
30ade641 | 15565 | break; |
15566 | ||
15567 | case VAR_DECL: | |
f80d1bcd | 15568 | /* Ignore this VAR_DECL if it refers to a file-scope extern data object |
c83a163c | 15569 | declaration and if the declaration was never even referenced from |
15570 | within this entire compilation unit. We suppress these DIEs in | |
15571 | order to save space in the .debug section (by eliminating entries | |
15572 | which are probably useless). Note that we must not suppress | |
15573 | block-local extern declarations (whether used or not) because that | |
15574 | would screw-up the debugger's name lookup mechanism and cause it to | |
15575 | miss things which really ought to be in scope at a given point. */ | |
30ade641 | 15576 | if (DECL_EXTERNAL (decl) && !TREE_USED (decl)) |
ec1e49cc | 15577 | return; |
30ade641 | 15578 | |
127d7f21 | 15579 | /* For local statics lookup proper context die. */ |
15580 | if (TREE_STATIC (decl) && decl_function_context (decl)) | |
15581 | context_die = lookup_decl_die (DECL_CONTEXT (decl)); | |
15582 | ||
30ade641 | 15583 | /* If we are in terse mode, don't generate any DIEs to represent any |
c83a163c | 15584 | variable declarations or definitions. */ |
30ade641 | 15585 | if (debug_info_level <= DINFO_LEVEL_TERSE) |
ec1e49cc | 15586 | return; |
30ade641 | 15587 | break; |
15588 | ||
2eb674c9 | 15589 | case CONST_DECL: |
15590 | if (debug_info_level <= DINFO_LEVEL_TERSE) | |
15591 | return; | |
15592 | if (!is_fortran ()) | |
15593 | return; | |
15594 | if (TREE_STATIC (decl) && decl_function_context (decl)) | |
15595 | context_die = lookup_decl_die (DECL_CONTEXT (decl)); | |
15596 | break; | |
15597 | ||
e89530cd | 15598 | case NAMESPACE_DECL: |
5d8a39b7 | 15599 | case IMPORTED_DECL: |
e89530cd | 15600 | if (debug_info_level <= DINFO_LEVEL_TERSE) |
15601 | return; | |
15602 | if (lookup_decl_die (decl) != NULL) | |
61a9389f | 15603 | return; |
e89530cd | 15604 | break; |
15605 | ||
30ade641 | 15606 | case TYPE_DECL: |
ee536dac | 15607 | /* Don't emit stubs for types unless they are needed by other DIEs. */ |
15608 | if (TYPE_DECL_SUPPRESS_DEBUG (decl)) | |
15609 | return; | |
15610 | ||
30ade641 | 15611 | /* Don't bother trying to generate any DIEs to represent any of the |
c83a163c | 15612 | normal built-in types for the language we are compiling. */ |
7bd3dcc4 | 15613 | if (DECL_IS_BUILTIN (decl)) |
6efd403b | 15614 | { |
15615 | /* OK, we need to generate one for `bool' so GDB knows what type | |
c83a163c | 15616 | comparisons have. */ |
bda642f9 | 15617 | if (is_cxx () |
90f973ed | 15618 | && TREE_CODE (TREE_TYPE (decl)) == BOOLEAN_TYPE |
15619 | && ! DECL_IGNORED_P (decl)) | |
6efd403b | 15620 | modified_type_die (TREE_TYPE (decl), 0, 0, NULL); |
ec1e49cc | 15621 | |
6efd403b | 15622 | return; |
15623 | } | |
30ade641 | 15624 | |
464217f3 | 15625 | /* If we are in terse mode, don't generate any DIEs for types. */ |
30ade641 | 15626 | if (debug_info_level <= DINFO_LEVEL_TERSE) |
43f116ae | 15627 | return; |
464217f3 | 15628 | |
15629 | /* If we're a function-scope tag, initially use a parent of NULL; | |
15630 | this will be fixed up in decls_for_scope. */ | |
15631 | if (decl_function_context (decl)) | |
8a8bfbe7 | 15632 | context_die = NULL; |
464217f3 | 15633 | |
30ade641 | 15634 | break; |
15635 | ||
15636 | default: | |
15637 | return; | |
15638 | } | |
15639 | ||
4b5d70fd | 15640 | gen_decl_die (decl, NULL, context_die); |
30ade641 | 15641 | } |
15642 | ||
15643 | /* Output a marker (i.e. a label) for the beginning of the generated code for | |
15644 | a lexical block. */ | |
ec1e49cc | 15645 | |
1dff614c | 15646 | static void |
8ec3a57b | 15647 | dwarf2out_begin_block (unsigned int line ATTRIBUTE_UNUSED, |
15648 | unsigned int blocknum) | |
30ade641 | 15649 | { |
2f14b1f9 | 15650 | switch_to_section (current_function_section ()); |
64e17633 | 15651 | ASM_OUTPUT_DEBUG_LABEL (asm_out_file, BLOCK_BEGIN_LABEL, blocknum); |
30ade641 | 15652 | } |
15653 | ||
15654 | /* Output a marker (i.e. a label) for the end of the generated code for a | |
15655 | lexical block. */ | |
ec1e49cc | 15656 | |
1dff614c | 15657 | static void |
8ec3a57b | 15658 | dwarf2out_end_block (unsigned int line ATTRIBUTE_UNUSED, unsigned int blocknum) |
30ade641 | 15659 | { |
2f14b1f9 | 15660 | switch_to_section (current_function_section ()); |
64e17633 | 15661 | ASM_OUTPUT_DEBUG_LABEL (asm_out_file, BLOCK_END_LABEL, blocknum); |
30ade641 | 15662 | } |
15663 | ||
0a78547b | 15664 | /* Returns nonzero if it is appropriate not to emit any debugging |
15665 | information for BLOCK, because it doesn't contain any instructions. | |
ad2fe2cd | 15666 | |
0a78547b | 15667 | Don't allow this for blocks with nested functions or local classes |
15668 | as we would end up with orphans, and in the presence of scheduling | |
15669 | we may end up calling them anyway. */ | |
15670 | ||
b29760a8 | 15671 | static bool |
5493cb9a | 15672 | dwarf2out_ignore_block (const_tree block) |
ad2fe2cd | 15673 | { |
15674 | tree decl; | |
4b5d70fd | 15675 | unsigned int i; |
8c3f468d | 15676 | |
ad2fe2cd | 15677 | for (decl = BLOCK_VARS (block); decl; decl = TREE_CHAIN (decl)) |
0a78547b | 15678 | if (TREE_CODE (decl) == FUNCTION_DECL |
15679 | || (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl))) | |
15680 | return 0; | |
4b5d70fd | 15681 | for (i = 0; i < BLOCK_NUM_NONLOCALIZED_VARS (block); i++) |
15682 | { | |
15683 | decl = BLOCK_NONLOCALIZED_VAR (block, i); | |
15684 | if (TREE_CODE (decl) == FUNCTION_DECL | |
15685 | || (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl))) | |
15686 | return 0; | |
15687 | } | |
8c3f468d | 15688 | |
0a78547b | 15689 | return 1; |
ad2fe2cd | 15690 | } |
15691 | ||
69278c24 | 15692 | /* Hash table routines for file_hash. */ |
15693 | ||
15694 | static int | |
15695 | file_table_eq (const void *p1_p, const void *p2_p) | |
15696 | { | |
2457c754 | 15697 | const struct dwarf_file_data *const p1 = |
15698 | (const struct dwarf_file_data *) p1_p; | |
15699 | const char *const p2 = (const char *) p2_p; | |
69278c24 | 15700 | return strcmp (p1->filename, p2) == 0; |
15701 | } | |
15702 | ||
15703 | static hashval_t | |
15704 | file_table_hash (const void *p_p) | |
15705 | { | |
2457c754 | 15706 | const struct dwarf_file_data *const p = (const struct dwarf_file_data *) p_p; |
69278c24 | 15707 | return htab_hash_string (p->filename); |
15708 | } | |
15709 | ||
8c3f468d | 15710 | /* Lookup FILE_NAME (in the list of filenames that we know about here in |
be6eb971 | 15711 | dwarf2out.c) and return its "index". The index of each (known) filename is |
8c3f468d | 15712 | just a unique number which is associated with only that one filename. We |
15713 | need such numbers for the sake of generating labels (in the .debug_sfnames | |
15714 | section) and references to those files numbers (in the .debug_srcinfo | |
15715 | and.debug_macinfo sections). If the filename given as an argument is not | |
15716 | found in our current list, add it to the list and assign it the next | |
15717 | available unique index number. In order to speed up searches, we remember | |
15718 | the index of the filename was looked up last. This handles the majority of | |
15719 | all searches. */ | |
ec1e49cc | 15720 | |
69278c24 | 15721 | static struct dwarf_file_data * |
8ec3a57b | 15722 | lookup_filename (const char *file_name) |
30ade641 | 15723 | { |
69278c24 | 15724 | void ** slot; |
15725 | struct dwarf_file_data * created; | |
30ade641 | 15726 | |
5a3023d9 | 15727 | /* Check to see if the file name that was searched on the previous |
15728 | call matches this file name. If so, return the index. */ | |
69278c24 | 15729 | if (file_table_last_lookup |
15730 | && (file_name == file_table_last_lookup->filename | |
15731 | || strcmp (file_table_last_lookup->filename, file_name) == 0)) | |
15732 | return file_table_last_lookup; | |
30ade641 | 15733 | |
778ac06a | 15734 | /* Didn't match the previous lookup, search the table. */ |
69278c24 | 15735 | slot = htab_find_slot_with_hash (file_table, file_name, |
15736 | htab_hash_string (file_name), INSERT); | |
15737 | if (*slot) | |
2457c754 | 15738 | return (struct dwarf_file_data *) *slot; |
30ade641 | 15739 | |
2457c754 | 15740 | created = GGC_NEW (struct dwarf_file_data); |
69278c24 | 15741 | created->filename = file_name; |
15742 | created->emitted_number = 0; | |
15743 | *slot = created; | |
15744 | return created; | |
c83a163c | 15745 | } |
15746 | ||
44276901 | 15747 | /* If the assembler will construct the file table, then translate the compiler |
15748 | internal file table number into the assembler file table number, and emit | |
15749 | a .file directive if we haven't already emitted one yet. The file table | |
15750 | numbers are different because we prune debug info for unused variables and | |
15751 | types, which may include filenames. */ | |
15752 | ||
c83a163c | 15753 | static int |
69278c24 | 15754 | maybe_emit_file (struct dwarf_file_data * fd) |
c83a163c | 15755 | { |
69278c24 | 15756 | if (! fd->emitted_number) |
6e957326 | 15757 | { |
69278c24 | 15758 | if (last_emitted_file) |
15759 | fd->emitted_number = last_emitted_file->emitted_number + 1; | |
15760 | else | |
15761 | fd->emitted_number = 1; | |
15762 | last_emitted_file = fd; | |
61a9389f | 15763 | |
69278c24 | 15764 | if (DWARF2_ASM_LINE_DEBUG_INFO) |
c83a163c | 15765 | { |
69278c24 | 15766 | fprintf (asm_out_file, "\t.file %u ", fd->emitted_number); |
5f1f2de5 | 15767 | output_quoted_string (asm_out_file, |
15768 | remap_debug_filename (fd->filename)); | |
c83a163c | 15769 | fputc ('\n', asm_out_file); |
15770 | } | |
6e957326 | 15771 | } |
61a9389f | 15772 | |
69278c24 | 15773 | return fd->emitted_number; |
30ade641 | 15774 | } |
15775 | ||
8d17cbdd | 15776 | /* Replace DW_AT_name for the decl with name. */ |
15777 | ||
15778 | static void | |
15779 | dwarf2out_set_name (tree decl, tree name) | |
15780 | { | |
15781 | dw_die_ref die; | |
15782 | dw_attr_ref attr; | |
15783 | ||
15784 | die = TYPE_SYMTAB_DIE (decl); | |
15785 | if (!die) | |
15786 | return; | |
15787 | ||
15788 | attr = get_AT (die, DW_AT_name); | |
15789 | if (attr) | |
15790 | { | |
15791 | struct indirect_string_node *node; | |
15792 | ||
15793 | node = find_AT_string (dwarf2_name (name, 0)); | |
15794 | /* replace the string. */ | |
15795 | attr->dw_attr_val.v.val_str = node; | |
15796 | } | |
15797 | ||
15798 | else | |
15799 | add_name_attribute (die, dwarf2_name (name, 0)); | |
15800 | } | |
b2025850 | 15801 | /* Called by the final INSN scan whenever we see a var location. We |
15802 | use it to drop labels in the right places, and throw the location in | |
15803 | our lookup table. */ | |
15804 | ||
15805 | static void | |
15806 | dwarf2out_var_location (rtx loc_note) | |
15807 | { | |
15808 | char loclabel[MAX_ARTIFICIAL_LABEL_BYTES]; | |
15809 | struct var_loc_node *newloc; | |
15810 | rtx prev_insn; | |
15811 | static rtx last_insn; | |
15812 | static const char *last_label; | |
bbc7bce1 | 15813 | tree decl; |
b2025850 | 15814 | |
15815 | if (!DECL_P (NOTE_VAR_LOCATION_DECL (loc_note))) | |
15816 | return; | |
15817 | prev_insn = PREV_INSN (loc_note); | |
15818 | ||
2457c754 | 15819 | newloc = GGC_CNEW (struct var_loc_node); |
b2025850 | 15820 | /* If the insn we processed last time is the previous insn |
15821 | and it is also a var location note, use the label we emitted | |
15822 | last time. */ | |
15823 | if (last_insn != NULL_RTX | |
15824 | && last_insn == prev_insn | |
6d7dc5b9 | 15825 | && NOTE_P (prev_insn) |
ad4583d9 | 15826 | && NOTE_KIND (prev_insn) == NOTE_INSN_VAR_LOCATION) |
b2025850 | 15827 | { |
15828 | newloc->label = last_label; | |
15829 | } | |
15830 | else | |
15831 | { | |
15832 | ASM_GENERATE_INTERNAL_LABEL (loclabel, "LVL", loclabel_num); | |
15833 | ASM_OUTPUT_DEBUG_LABEL (asm_out_file, "LVL", loclabel_num); | |
15834 | loclabel_num++; | |
15835 | newloc->label = ggc_strdup (loclabel); | |
15836 | } | |
15837 | newloc->var_loc_note = loc_note; | |
15838 | newloc->next = NULL; | |
15839 | ||
5fbee89d | 15840 | if (cfun && in_cold_section_p) |
abe32cce | 15841 | newloc->section_label = crtl->subsections.cold_section_label; |
1897b881 | 15842 | else |
15843 | newloc->section_label = text_section_label; | |
15844 | ||
b2025850 | 15845 | last_insn = loc_note; |
15846 | last_label = newloc->label; | |
bbc7bce1 | 15847 | decl = NOTE_VAR_LOCATION_DECL (loc_note); |
bbc7bce1 | 15848 | add_var_loc_to_decl (decl, newloc); |
b2025850 | 15849 | } |
15850 | ||
15851 | /* We need to reset the locations at the beginning of each | |
15852 | function. We can't do this in the end_function hook, because the | |
dae1861f | 15853 | declarations that use the locations won't have been output when |
15854 | that hook is called. Also compute have_multiple_function_sections here. */ | |
b2025850 | 15855 | |
15856 | static void | |
dae1861f | 15857 | dwarf2out_begin_function (tree fun) |
b2025850 | 15858 | { |
15859 | htab_empty (decl_loc_table); | |
61a9389f | 15860 | |
dae1861f | 15861 | if (function_section (fun) != text_section) |
15862 | have_multiple_function_sections = true; | |
d6de7df9 | 15863 | |
15864 | dwarf2out_note_section_used (); | |
b2025850 | 15865 | } |
15866 | ||
30ade641 | 15867 | /* Output a label to mark the beginning of a source code line entry |
15868 | and record information relating to this source line, in | |
15869 | 'line_info_table' for later output of the .debug_line section. */ | |
ec1e49cc | 15870 | |
b9b7f8b4 | 15871 | static void |
8ec3a57b | 15872 | dwarf2out_source_line (unsigned int line, const char *filename) |
30ade641 | 15873 | { |
d8a4712b | 15874 | if (debug_info_level >= DINFO_LEVEL_NORMAL |
15875 | && line != 0) | |
30ade641 | 15876 | { |
69278c24 | 15877 | int file_num = maybe_emit_file (lookup_filename (filename)); |
61a9389f | 15878 | |
2f14b1f9 | 15879 | switch_to_section (current_function_section ()); |
30ade641 | 15880 | |
80ae3362 | 15881 | /* If requested, emit something human-readable. */ |
15882 | if (flag_debug_asm) | |
15883 | fprintf (asm_out_file, "\t%s %s:%d\n", ASM_COMMENT_START, | |
15884 | filename, line); | |
15885 | ||
985956c1 | 15886 | if (DWARF2_ASM_LINE_DEBUG_INFO) |
15887 | { | |
3740694f | 15888 | /* Emit the .loc directive understood by GNU as. */ |
5a3023d9 | 15889 | fprintf (asm_out_file, "\t.loc %d %d 0\n", file_num, line); |
985956c1 | 15890 | |
15891 | /* Indicate that line number info exists. */ | |
8c3f468d | 15892 | line_info_table_in_use++; |
985956c1 | 15893 | } |
dae1861f | 15894 | else if (function_section (current_function_decl) != text_section) |
30ade641 | 15895 | { |
19cb6b50 | 15896 | dw_separate_line_info_ref line_info; |
61a9389f | 15897 | targetm.asm_out.internal_label (asm_out_file, |
69278c24 | 15898 | SEPARATE_LINE_CODE_LABEL, |
15899 | separate_line_info_table_in_use); | |
c05d7491 | 15900 | |
aab2cf92 | 15901 | /* Expand the line info table if necessary. */ |
c05d7491 | 15902 | if (separate_line_info_table_in_use |
15903 | == separate_line_info_table_allocated) | |
15904 | { | |
15905 | separate_line_info_table_allocated += LINE_INFO_TABLE_INCREMENT; | |
15906 | separate_line_info_table | |
2457c754 | 15907 | = GGC_RESIZEVEC (dw_separate_line_info_entry, |
15908 | separate_line_info_table, | |
15909 | separate_line_info_table_allocated); | |
f0af5a88 | 15910 | memset (separate_line_info_table |
15911 | + separate_line_info_table_in_use, | |
573aba85 | 15912 | 0, |
8ec3a57b | 15913 | (LINE_INFO_TABLE_INCREMENT |
573aba85 | 15914 | * sizeof (dw_separate_line_info_entry))); |
c05d7491 | 15915 | } |
ec1e49cc | 15916 | |
15917 | /* Add the new entry at the end of the line_info_table. */ | |
c05d7491 | 15918 | line_info |
15919 | = &separate_line_info_table[separate_line_info_table_in_use++]; | |
69278c24 | 15920 | line_info->dw_file_num = file_num; |
c05d7491 | 15921 | line_info->dw_line_num = line; |
4781f9b9 | 15922 | line_info->function = current_function_funcdef_no; |
c05d7491 | 15923 | } |
15924 | else | |
15925 | { | |
19cb6b50 | 15926 | dw_line_info_ref line_info; |
ec1e49cc | 15927 | |
883b2e73 | 15928 | targetm.asm_out.internal_label (asm_out_file, LINE_CODE_LABEL, |
d58978a6 | 15929 | line_info_table_in_use); |
c05d7491 | 15930 | |
ec1e49cc | 15931 | /* Expand the line info table if necessary. */ |
c05d7491 | 15932 | if (line_info_table_in_use == line_info_table_allocated) |
15933 | { | |
15934 | line_info_table_allocated += LINE_INFO_TABLE_INCREMENT; | |
15935 | line_info_table | |
2457c754 | 15936 | = GGC_RESIZEVEC (dw_line_info_entry, line_info_table, |
15937 | line_info_table_allocated); | |
573aba85 | 15938 | memset (line_info_table + line_info_table_in_use, 0, |
15939 | LINE_INFO_TABLE_INCREMENT * sizeof (dw_line_info_entry)); | |
c05d7491 | 15940 | } |
ec1e49cc | 15941 | |
15942 | /* Add the new entry at the end of the line_info_table. */ | |
c05d7491 | 15943 | line_info = &line_info_table[line_info_table_in_use++]; |
69278c24 | 15944 | line_info->dw_file_num = file_num; |
c05d7491 | 15945 | line_info->dw_line_num = line; |
30ade641 | 15946 | } |
30ade641 | 15947 | } |
15948 | } | |
15949 | ||
6312a35e | 15950 | /* Record the beginning of a new source file. */ |
ec1e49cc | 15951 | |
c140b944 | 15952 | static void |
8ec3a57b | 15953 | dwarf2out_start_source_file (unsigned int lineno, const char *filename) |
30ade641 | 15954 | { |
7a614b74 | 15955 | if (flag_eliminate_dwarf2_dups) |
19f716e5 | 15956 | { |
15957 | /* Record the beginning of the file for break_out_includes. */ | |
51e8c210 | 15958 | dw_die_ref bincl_die; |
15959 | ||
15960 | bincl_die = new_die (DW_TAG_GNU_BINCL, comp_unit_die, NULL); | |
5f1f2de5 | 15961 | add_AT_string (bincl_die, DW_AT_name, remap_debug_filename (filename)); |
19f716e5 | 15962 | } |
8c3f468d | 15963 | |
1d340a5e | 15964 | if (debug_info_level >= DINFO_LEVEL_VERBOSE) |
15965 | { | |
69278c24 | 15966 | int file_num = maybe_emit_file (lookup_filename (filename)); |
9b1f6100 | 15967 | |
2f14b1f9 | 15968 | switch_to_section (debug_macinfo_section); |
1d340a5e | 15969 | dw2_asm_output_data (1, DW_MACINFO_start_file, "Start new file"); |
2cb4ac60 | 15970 | dw2_asm_output_data_uleb128 (lineno, "Included from line number %d", |
15971 | lineno); | |
9b1f6100 | 15972 | |
69278c24 | 15973 | dw2_asm_output_data_uleb128 (file_num, "file %s", filename); |
1d340a5e | 15974 | } |
30ade641 | 15975 | } |
15976 | ||
c5c7e194 | 15977 | /* Record the end of a source file. */ |
ec1e49cc | 15978 | |
c140b944 | 15979 | static void |
8ec3a57b | 15980 | dwarf2out_end_source_file (unsigned int lineno ATTRIBUTE_UNUSED) |
30ade641 | 15981 | { |
19f716e5 | 15982 | if (flag_eliminate_dwarf2_dups) |
8c3f468d | 15983 | /* Record the end of the file for break_out_includes. */ |
15cfae4e | 15984 | new_die (DW_TAG_GNU_EINCL, comp_unit_die, NULL); |
8c3f468d | 15985 | |
1d340a5e | 15986 | if (debug_info_level >= DINFO_LEVEL_VERBOSE) |
15987 | { | |
2f14b1f9 | 15988 | switch_to_section (debug_macinfo_section); |
1d340a5e | 15989 | dw2_asm_output_data (1, DW_MACINFO_end_file, "End file"); |
15990 | } | |
30ade641 | 15991 | } |
15992 | ||
c5c7e194 | 15993 | /* Called from debug_define in toplev.c. The `buffer' parameter contains |
30ade641 | 15994 | the tail part of the directive line, i.e. the part which is past the |
15995 | initial whitespace, #, whitespace, directive-name, whitespace part. */ | |
ec1e49cc | 15996 | |
c140b944 | 15997 | static void |
8ec3a57b | 15998 | dwarf2out_define (unsigned int lineno ATTRIBUTE_UNUSED, |
15999 | const char *buffer ATTRIBUTE_UNUSED) | |
30ade641 | 16000 | { |
1d340a5e | 16001 | if (debug_info_level >= DINFO_LEVEL_VERBOSE) |
16002 | { | |
2f14b1f9 | 16003 | switch_to_section (debug_macinfo_section); |
1d340a5e | 16004 | dw2_asm_output_data (1, DW_MACINFO_define, "Define macro"); |
16005 | dw2_asm_output_data_uleb128 (lineno, "At line number %d", lineno); | |
16006 | dw2_asm_output_nstring (buffer, -1, "The macro"); | |
16007 | } | |
30ade641 | 16008 | } |
16009 | ||
c5c7e194 | 16010 | /* Called from debug_undef in toplev.c. The `buffer' parameter contains |
30ade641 | 16011 | the tail part of the directive line, i.e. the part which is past the |
16012 | initial whitespace, #, whitespace, directive-name, whitespace part. */ | |
ec1e49cc | 16013 | |
c140b944 | 16014 | static void |
8ec3a57b | 16015 | dwarf2out_undef (unsigned int lineno ATTRIBUTE_UNUSED, |
16016 | const char *buffer ATTRIBUTE_UNUSED) | |
30ade641 | 16017 | { |
1d340a5e | 16018 | if (debug_info_level >= DINFO_LEVEL_VERBOSE) |
16019 | { | |
2f14b1f9 | 16020 | switch_to_section (debug_macinfo_section); |
1d340a5e | 16021 | dw2_asm_output_data (1, DW_MACINFO_undef, "Undefine macro"); |
16022 | dw2_asm_output_data_uleb128 (lineno, "At line number %d", lineno); | |
16023 | dw2_asm_output_nstring (buffer, -1, "The macro"); | |
16024 | } | |
30ade641 | 16025 | } |
16026 | ||
16027 | /* Set up for Dwarf output at the start of compilation. */ | |
ec1e49cc | 16028 | |
b896d81b | 16029 | static void |
8ec3a57b | 16030 | dwarf2out_init (const char *filename ATTRIBUTE_UNUSED) |
30ade641 | 16031 | { |
69278c24 | 16032 | /* Allocate the file_table. */ |
16033 | file_table = htab_create_ggc (50, file_table_hash, | |
16034 | file_table_eq, NULL); | |
0924bbb7 | 16035 | |
b2025850 | 16036 | /* Allocate the decl_die_table. */ |
26863140 | 16037 | decl_die_table = htab_create_ggc (10, decl_die_table_hash, |
16038 | decl_die_table_eq, NULL); | |
b2025850 | 16039 | |
16040 | /* Allocate the decl_loc_table. */ | |
16041 | decl_loc_table = htab_create_ggc (10, decl_loc_table_hash, | |
16042 | decl_loc_table_eq, NULL); | |
30ade641 | 16043 | |
16044 | /* Allocate the initial hunk of the decl_scope_table. */ | |
4a940e75 | 16045 | decl_scope_table = VEC_alloc (tree, gc, 256); |
30ade641 | 16046 | |
16047 | /* Allocate the initial hunk of the abbrev_die_table. */ | |
2457c754 | 16048 | abbrev_die_table = GGC_CNEWVEC (dw_die_ref, ABBREV_DIE_TABLE_INCREMENT); |
30ade641 | 16049 | abbrev_die_table_allocated = ABBREV_DIE_TABLE_INCREMENT; |
778ac06a | 16050 | /* Zero-th entry is allocated, but unused. */ |
30ade641 | 16051 | abbrev_die_table_in_use = 1; |
16052 | ||
16053 | /* Allocate the initial hunk of the line_info_table. */ | |
2457c754 | 16054 | line_info_table = GGC_CNEWVEC (dw_line_info_entry, LINE_INFO_TABLE_INCREMENT); |
30ade641 | 16055 | line_info_table_allocated = LINE_INFO_TABLE_INCREMENT; |
8c3f468d | 16056 | |
778ac06a | 16057 | /* Zero-th entry is allocated, but unused. */ |
30ade641 | 16058 | line_info_table_in_use = 1; |
16059 | ||
af84796a | 16060 | /* Allocate the pubtypes and pubnames vectors. */ |
16061 | pubname_table = VEC_alloc (pubname_entry, gc, 32); | |
16062 | pubtype_table = VEC_alloc (pubname_entry, gc, 32); | |
16063 | ||
f80d1bcd | 16064 | /* Generate the initial DIE for the .debug section. Note that the (string) |
30ade641 | 16065 | value given in the DW_AT_name attribute of the DW_TAG_compile_unit DIE |
f80d1bcd | 16066 | will (typically) be a relative pathname and that this pathname should be |
30ade641 | 16067 | taken as being relative to the directory from which the compiler was |
ff279357 | 16068 | invoked when the given (base) source file was compiled. We will fill |
16069 | in this value in dwarf2out_finish. */ | |
16070 | comp_unit_die = gen_compile_unit_die (NULL); | |
30ade641 | 16071 | |
22230dd1 | 16072 | incomplete_types = VEC_alloc (tree, gc, 64); |
52a7cc7b | 16073 | |
62aedc4c | 16074 | used_rtx_array = VEC_alloc (rtx, gc, 32); |
eacbfaac | 16075 | |
2f14b1f9 | 16076 | debug_info_section = get_section (DEBUG_INFO_SECTION, |
16077 | SECTION_DEBUG, NULL); | |
16078 | debug_abbrev_section = get_section (DEBUG_ABBREV_SECTION, | |
16079 | SECTION_DEBUG, NULL); | |
16080 | debug_aranges_section = get_section (DEBUG_ARANGES_SECTION, | |
16081 | SECTION_DEBUG, NULL); | |
16082 | debug_macinfo_section = get_section (DEBUG_MACINFO_SECTION, | |
16083 | SECTION_DEBUG, NULL); | |
16084 | debug_line_section = get_section (DEBUG_LINE_SECTION, | |
16085 | SECTION_DEBUG, NULL); | |
16086 | debug_loc_section = get_section (DEBUG_LOC_SECTION, | |
16087 | SECTION_DEBUG, NULL); | |
16088 | debug_pubnames_section = get_section (DEBUG_PUBNAMES_SECTION, | |
16089 | SECTION_DEBUG, NULL); | |
af84796a | 16090 | #ifdef DEBUG_PUBTYPES_SECTION |
16091 | debug_pubtypes_section = get_section (DEBUG_PUBTYPES_SECTION, | |
16092 | SECTION_DEBUG, NULL); | |
16093 | #endif | |
2f14b1f9 | 16094 | debug_str_section = get_section (DEBUG_STR_SECTION, |
16095 | DEBUG_STR_SECTION_FLAGS, NULL); | |
16096 | debug_ranges_section = get_section (DEBUG_RANGES_SECTION, | |
16097 | SECTION_DEBUG, NULL); | |
d08d29c0 | 16098 | debug_frame_section = get_section (DEBUG_FRAME_SECTION, |
16099 | SECTION_DEBUG, NULL); | |
2f14b1f9 | 16100 | |
d58978a6 | 16101 | ASM_GENERATE_INTERNAL_LABEL (text_end_label, TEXT_END_LABEL, 0); |
049aa99b | 16102 | ASM_GENERATE_INTERNAL_LABEL (abbrev_section_label, |
16103 | DEBUG_ABBREV_SECTION_LABEL, 0); | |
e335d512 | 16104 | ASM_GENERATE_INTERNAL_LABEL (text_section_label, TEXT_SECTION_LABEL, 0); |
61a9389f | 16105 | ASM_GENERATE_INTERNAL_LABEL (cold_text_section_label, |
4d0e931f | 16106 | COLD_TEXT_SECTION_LABEL, 0); |
16107 | ASM_GENERATE_INTERNAL_LABEL (cold_end_label, COLD_END_LABEL, 0); | |
8c3f468d | 16108 | |
f80d1bcd | 16109 | ASM_GENERATE_INTERNAL_LABEL (debug_info_section_label, |
65fc1a16 | 16110 | DEBUG_INFO_SECTION_LABEL, 0); |
f80d1bcd | 16111 | ASM_GENERATE_INTERNAL_LABEL (debug_line_section_label, |
65fc1a16 | 16112 | DEBUG_LINE_SECTION_LABEL, 0); |
fe39c28c | 16113 | ASM_GENERATE_INTERNAL_LABEL (ranges_section_label, |
16114 | DEBUG_RANGES_SECTION_LABEL, 0); | |
2f14b1f9 | 16115 | switch_to_section (debug_abbrev_section); |
65fc1a16 | 16116 | ASM_OUTPUT_LABEL (asm_out_file, abbrev_section_label); |
2f14b1f9 | 16117 | switch_to_section (debug_info_section); |
65fc1a16 | 16118 | ASM_OUTPUT_LABEL (asm_out_file, debug_info_section_label); |
2f14b1f9 | 16119 | switch_to_section (debug_line_section); |
65fc1a16 | 16120 | ASM_OUTPUT_LABEL (asm_out_file, debug_line_section_label); |
8c3f468d | 16121 | |
1d340a5e | 16122 | if (debug_info_level >= DINFO_LEVEL_VERBOSE) |
16123 | { | |
2f14b1f9 | 16124 | switch_to_section (debug_macinfo_section); |
1d340a5e | 16125 | ASM_GENERATE_INTERNAL_LABEL (macinfo_section_label, |
16126 | DEBUG_MACINFO_SECTION_LABEL, 0); | |
16127 | ASM_OUTPUT_LABEL (asm_out_file, macinfo_section_label); | |
16128 | } | |
2cb4ac60 | 16129 | |
2f14b1f9 | 16130 | switch_to_section (text_section); |
e335d512 | 16131 | ASM_OUTPUT_LABEL (asm_out_file, text_section_label); |
4d0e931f | 16132 | if (flag_reorder_blocks_and_partition) |
16133 | { | |
d6de7df9 | 16134 | cold_text_section = unlikely_text_section (); |
16135 | switch_to_section (cold_text_section); | |
4d0e931f | 16136 | ASM_OUTPUT_LABEL (asm_out_file, cold_text_section_label); |
16137 | } | |
30ade641 | 16138 | } |
16139 | ||
80b7bd06 | 16140 | /* A helper function for dwarf2out_finish called through |
16141 | ht_forall. Emit one queued .debug_str string. */ | |
16142 | ||
16143 | static int | |
8ec3a57b | 16144 | output_indirect_string (void **h, void *v ATTRIBUTE_UNUSED) |
80b7bd06 | 16145 | { |
573aba85 | 16146 | struct indirect_string_node *node = (struct indirect_string_node *) *h; |
80b7bd06 | 16147 | |
80b7bd06 | 16148 | if (node->form == DW_FORM_strp) |
16149 | { | |
2f14b1f9 | 16150 | switch_to_section (debug_str_section); |
80b7bd06 | 16151 | ASM_OUTPUT_LABEL (asm_out_file, node->label); |
573aba85 | 16152 | assemble_string (node->str, strlen (node->str) + 1); |
80b7bd06 | 16153 | } |
8c3f468d | 16154 | |
80b7bd06 | 16155 | return 1; |
16156 | } | |
16157 | ||
cd04bce0 | 16158 | #if ENABLE_ASSERT_CHECKING |
16159 | /* Verify that all marks are clear. */ | |
c83a163c | 16160 | |
cd04bce0 | 16161 | static void |
16162 | verify_marks_clear (dw_die_ref die) | |
16163 | { | |
16164 | dw_die_ref c; | |
61a9389f | 16165 | |
cd04bce0 | 16166 | gcc_assert (! die->die_mark); |
16167 | FOR_EACH_CHILD (die, c, verify_marks_clear (c)); | |
16168 | } | |
16169 | #endif /* ENABLE_ASSERT_CHECKING */ | |
c83a163c | 16170 | |
16171 | /* Clear the marks for a die and its children. | |
037845e5 | 16172 | Be cool if the mark isn't set. */ |
c83a163c | 16173 | |
16174 | static void | |
8ec3a57b | 16175 | prune_unmark_dies (dw_die_ref die) |
c83a163c | 16176 | { |
16177 | dw_die_ref c; | |
61a9389f | 16178 | |
958656b7 | 16179 | if (die->die_mark) |
16180 | die->die_mark = 0; | |
16181 | FOR_EACH_CHILD (die, c, prune_unmark_dies (c)); | |
c83a163c | 16182 | } |
16183 | ||
c83a163c | 16184 | /* Given DIE that we're marking as used, find any other dies |
16185 | it references as attributes and mark them as used. */ | |
16186 | ||
16187 | static void | |
8ec3a57b | 16188 | prune_unused_types_walk_attribs (dw_die_ref die) |
c83a163c | 16189 | { |
16190 | dw_attr_ref a; | |
6f56c055 | 16191 | unsigned ix; |
c83a163c | 16192 | |
6f56c055 | 16193 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, a); ix++) |
c83a163c | 16194 | { |
16195 | if (a->dw_attr_val.val_class == dw_val_class_die_ref) | |
16196 | { | |
16197 | /* A reference to another DIE. | |
16198 | Make sure that it will get emitted. */ | |
16199 | prune_unused_types_mark (a->dw_attr_val.v.val_die_ref.die, 1); | |
16200 | } | |
b0aa6b33 | 16201 | /* Set the string's refcount to 0 so that prune_unused_types_mark |
16202 | accounts properly for it. */ | |
16203 | if (AT_class (a) == dw_val_class_str) | |
16204 | a->dw_attr_val.v.val_str->refcount = 0; | |
c83a163c | 16205 | } |
16206 | } | |
16207 | ||
16208 | ||
16209 | /* Mark DIE as being used. If DOKIDS is true, then walk down | |
16210 | to DIE's children. */ | |
16211 | ||
16212 | static void | |
8ec3a57b | 16213 | prune_unused_types_mark (dw_die_ref die, int dokids) |
c83a163c | 16214 | { |
16215 | dw_die_ref c; | |
16216 | ||
16217 | if (die->die_mark == 0) | |
16218 | { | |
16219 | /* We haven't done this node yet. Mark it as used. */ | |
16220 | die->die_mark = 1; | |
16221 | ||
16222 | /* We also have to mark its parents as used. | |
16223 | (But we don't want to mark our parents' kids due to this.) */ | |
16224 | if (die->die_parent) | |
16225 | prune_unused_types_mark (die->die_parent, 0); | |
16226 | ||
16227 | /* Mark any referenced nodes. */ | |
16228 | prune_unused_types_walk_attribs (die); | |
023dc493 | 16229 | |
16230 | /* If this node is a specification, | |
61a9389f | 16231 | also mark the definition, if it exists. */ |
023dc493 | 16232 | if (get_AT_flag (die, DW_AT_declaration) && die->die_definition) |
61a9389f | 16233 | prune_unused_types_mark (die->die_definition, 1); |
c83a163c | 16234 | } |
16235 | ||
16236 | if (dokids && die->die_mark != 2) | |
16237 | { | |
16238 | /* We need to walk the children, but haven't done so yet. | |
16239 | Remember that we've walked the kids. */ | |
16240 | die->die_mark = 2; | |
16241 | ||
958656b7 | 16242 | /* If this is an array type, we need to make sure our |
16243 | kids get marked, even if they're types. */ | |
16244 | if (die->die_tag == DW_TAG_array_type) | |
16245 | FOR_EACH_CHILD (die, c, prune_unused_types_mark (c, 1)); | |
16246 | else | |
16247 | FOR_EACH_CHILD (die, c, prune_unused_types_walk (c)); | |
c83a163c | 16248 | } |
16249 | } | |
16250 | ||
4e55a395 | 16251 | /* For local classes, look if any static member functions were emitted |
16252 | and if so, mark them. */ | |
16253 | ||
16254 | static void | |
16255 | prune_unused_types_walk_local_classes (dw_die_ref die) | |
16256 | { | |
16257 | dw_die_ref c; | |
16258 | ||
16259 | if (die->die_mark == 2) | |
16260 | return; | |
16261 | ||
16262 | switch (die->die_tag) | |
16263 | { | |
16264 | case DW_TAG_structure_type: | |
16265 | case DW_TAG_union_type: | |
16266 | case DW_TAG_class_type: | |
16267 | break; | |
16268 | ||
16269 | case DW_TAG_subprogram: | |
16270 | if (!get_AT_flag (die, DW_AT_declaration) | |
16271 | || die->die_definition != NULL) | |
16272 | prune_unused_types_mark (die, 1); | |
16273 | return; | |
16274 | ||
16275 | default: | |
16276 | return; | |
16277 | } | |
16278 | ||
16279 | /* Mark children. */ | |
16280 | FOR_EACH_CHILD (die, c, prune_unused_types_walk_local_classes (c)); | |
16281 | } | |
c83a163c | 16282 | |
16283 | /* Walk the tree DIE and mark types that we actually use. */ | |
16284 | ||
16285 | static void | |
8ec3a57b | 16286 | prune_unused_types_walk (dw_die_ref die) |
c83a163c | 16287 | { |
16288 | dw_die_ref c; | |
16289 | ||
4e55a395 | 16290 | /* Don't do anything if this node is already marked and |
16291 | children have been marked as well. */ | |
16292 | if (die->die_mark == 2) | |
c83a163c | 16293 | return; |
16294 | ||
7d4c98bc | 16295 | switch (die->die_tag) |
16296 | { | |
4e55a395 | 16297 | case DW_TAG_structure_type: |
16298 | case DW_TAG_union_type: | |
16299 | case DW_TAG_class_type: | |
16300 | if (die->die_perennial_p) | |
16301 | break; | |
16302 | ||
16303 | for (c = die->die_parent; c; c = c->die_parent) | |
16304 | if (c->die_tag == DW_TAG_subprogram) | |
16305 | break; | |
16306 | ||
16307 | /* Finding used static member functions inside of classes | |
16308 | is needed just for local classes, because for other classes | |
16309 | static member function DIEs with DW_AT_specification | |
16310 | are emitted outside of the DW_TAG_*_type. If we ever change | |
16311 | it, we'd need to call this even for non-local classes. */ | |
16312 | if (c) | |
16313 | prune_unused_types_walk_local_classes (die); | |
16314 | ||
16315 | /* It's a type node --- don't mark it. */ | |
16316 | return; | |
16317 | ||
7d4c98bc | 16318 | case DW_TAG_const_type: |
16319 | case DW_TAG_packed_type: | |
16320 | case DW_TAG_pointer_type: | |
16321 | case DW_TAG_reference_type: | |
16322 | case DW_TAG_volatile_type: | |
16323 | case DW_TAG_typedef: | |
16324 | case DW_TAG_array_type: | |
03a61d93 | 16325 | case DW_TAG_interface_type: |
7d4c98bc | 16326 | case DW_TAG_friend: |
16327 | case DW_TAG_variant_part: | |
16328 | case DW_TAG_enumeration_type: | |
16329 | case DW_TAG_subroutine_type: | |
16330 | case DW_TAG_string_type: | |
16331 | case DW_TAG_set_type: | |
16332 | case DW_TAG_subrange_type: | |
16333 | case DW_TAG_ptr_to_member_type: | |
16334 | case DW_TAG_file_type: | |
16335 | if (die->die_perennial_p) | |
16336 | break; | |
f6e59711 | 16337 | |
7d4c98bc | 16338 | /* It's a type node --- don't mark it. */ |
16339 | return; | |
c83a163c | 16340 | |
7d4c98bc | 16341 | default: |
16342 | /* Mark everything else. */ | |
16343 | break; | |
c83a163c | 16344 | } |
16345 | ||
4e55a395 | 16346 | if (die->die_mark == 0) |
16347 | { | |
16348 | die->die_mark = 1; | |
16349 | ||
16350 | /* Now, mark any dies referenced from here. */ | |
16351 | prune_unused_types_walk_attribs (die); | |
16352 | } | |
c83a163c | 16353 | |
4e55a395 | 16354 | die->die_mark = 2; |
c83a163c | 16355 | |
16356 | /* Mark children. */ | |
958656b7 | 16357 | FOR_EACH_CHILD (die, c, prune_unused_types_walk (c)); |
c83a163c | 16358 | } |
16359 | ||
b0aa6b33 | 16360 | /* Increment the string counts on strings referred to from DIE's |
16361 | attributes. */ | |
16362 | ||
16363 | static void | |
16364 | prune_unused_types_update_strings (dw_die_ref die) | |
16365 | { | |
16366 | dw_attr_ref a; | |
16367 | unsigned ix; | |
16368 | ||
16369 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, a); ix++) | |
16370 | if (AT_class (a) == dw_val_class_str) | |
16371 | { | |
16372 | struct indirect_string_node *s = a->dw_attr_val.v.val_str; | |
16373 | s->refcount++; | |
16374 | /* Avoid unnecessarily putting strings that are used less than | |
16375 | twice in the hash table. */ | |
20f220a9 | 16376 | if (s->refcount |
16377 | == ((DEBUG_STR_SECTION_FLAGS & SECTION_MERGE) ? 1 : 2)) | |
b0aa6b33 | 16378 | { |
16379 | void ** slot; | |
16380 | slot = htab_find_slot_with_hash (debug_str_hash, s->str, | |
16381 | htab_hash_string (s->str), | |
16382 | INSERT); | |
16383 | gcc_assert (*slot == NULL); | |
16384 | *slot = s; | |
16385 | } | |
16386 | } | |
16387 | } | |
c83a163c | 16388 | |
16389 | /* Remove from the tree DIE any dies that aren't marked. */ | |
16390 | ||
16391 | static void | |
8ec3a57b | 16392 | prune_unused_types_prune (dw_die_ref die) |
c83a163c | 16393 | { |
958656b7 | 16394 | dw_die_ref c; |
8ff30ff6 | 16395 | |
7bd4f6b6 | 16396 | gcc_assert (die->die_mark); |
4533b23c | 16397 | prune_unused_types_update_strings (die); |
c83a163c | 16398 | |
958656b7 | 16399 | if (! die->die_child) |
16400 | return; | |
61a9389f | 16401 | |
958656b7 | 16402 | c = die->die_child; |
16403 | do { | |
16404 | dw_die_ref prev = c; | |
16405 | for (c = c->die_sib; ! c->die_mark; c = c->die_sib) | |
16406 | if (c == die->die_child) | |
c83a163c | 16407 | { |
958656b7 | 16408 | /* No marked children between 'prev' and the end of the list. */ |
16409 | if (prev == c) | |
16410 | /* No marked children at all. */ | |
16411 | die->die_child = NULL; | |
16412 | else | |
16413 | { | |
16414 | prev->die_sib = c->die_sib; | |
16415 | die->die_child = prev; | |
16416 | } | |
16417 | return; | |
c83a163c | 16418 | } |
958656b7 | 16419 | |
16420 | if (c != prev->die_sib) | |
16421 | prev->die_sib = c; | |
958656b7 | 16422 | prune_unused_types_prune (c); |
16423 | } while (c != die->die_child); | |
c83a163c | 16424 | } |
16425 | ||
16426 | ||
16427 | /* Remove dies representing declarations that we never use. */ | |
16428 | ||
16429 | static void | |
8ec3a57b | 16430 | prune_unused_types (void) |
c83a163c | 16431 | { |
16432 | unsigned int i; | |
16433 | limbo_die_node *node; | |
af84796a | 16434 | pubname_ref pub; |
c83a163c | 16435 | |
cd04bce0 | 16436 | #if ENABLE_ASSERT_CHECKING |
16437 | /* All the marks should already be clear. */ | |
16438 | verify_marks_clear (comp_unit_die); | |
c83a163c | 16439 | for (node = limbo_die_list; node; node = node->next) |
cd04bce0 | 16440 | verify_marks_clear (node->die); |
16441 | #endif /* ENABLE_ASSERT_CHECKING */ | |
c83a163c | 16442 | |
16443 | /* Set the mark on nodes that are actually used. */ | |
16444 | prune_unused_types_walk (comp_unit_die); | |
16445 | for (node = limbo_die_list; node; node = node->next) | |
16446 | prune_unused_types_walk (node->die); | |
16447 | ||
16448 | /* Also set the mark on nodes referenced from the | |
16449 | pubname_table or arange_table. */ | |
af84796a | 16450 | for (i = 0; VEC_iterate (pubname_entry, pubname_table, i, pub); i++) |
16451 | prune_unused_types_mark (pub->die, 1); | |
ea0041f4 | 16452 | for (i = 0; i < arange_table_in_use; i++) |
16453 | prune_unused_types_mark (arange_table[i], 1); | |
c83a163c | 16454 | |
b0aa6b33 | 16455 | /* Get rid of nodes that aren't marked; and update the string counts. */ |
16456 | if (debug_str_hash) | |
16457 | htab_empty (debug_str_hash); | |
c83a163c | 16458 | prune_unused_types_prune (comp_unit_die); |
16459 | for (node = limbo_die_list; node; node = node->next) | |
16460 | prune_unused_types_prune (node->die); | |
16461 | ||
16462 | /* Leave the marks clear. */ | |
16463 | prune_unmark_dies (comp_unit_die); | |
16464 | for (node = limbo_die_list; node; node = node->next) | |
16465 | prune_unmark_dies (node->die); | |
16466 | } | |
16467 | ||
69278c24 | 16468 | /* Set the parameter to true if there are any relative pathnames in |
16469 | the file table. */ | |
16470 | static int | |
16471 | file_table_relative_p (void ** slot, void *param) | |
16472 | { | |
2457c754 | 16473 | bool *p = (bool *) param; |
16474 | struct dwarf_file_data *d = (struct dwarf_file_data *) *slot; | |
5f1f2de5 | 16475 | if (!IS_ABSOLUTE_PATH (d->filename)) |
69278c24 | 16476 | { |
16477 | *p = true; | |
16478 | return 0; | |
16479 | } | |
16480 | return 1; | |
16481 | } | |
16482 | ||
30ade641 | 16483 | /* Output stuff that dwarf requires at the end of every file, |
16484 | and generate the DWARF-2 debugging info. */ | |
ec1e49cc | 16485 | |
b896d81b | 16486 | static void |
8ec3a57b | 16487 | dwarf2out_finish (const char *filename) |
30ade641 | 16488 | { |
678d90bb | 16489 | limbo_die_node *node, *next_node; |
97b330ca | 16490 | dw_die_ref die = 0; |
89f29a1b | 16491 | unsigned int i; |
678d90bb | 16492 | |
ff279357 | 16493 | /* Add the name for the main input file now. We delayed this from |
16494 | dwarf2out_init to avoid complications with PCH. */ | |
5f1f2de5 | 16495 | add_name_attribute (comp_unit_die, remap_debug_filename (filename)); |
974a92fe | 16496 | if (!IS_ABSOLUTE_PATH (filename)) |
ff279357 | 16497 | add_comp_dir_attribute (comp_unit_die); |
83f77ecb | 16498 | else if (get_AT (comp_unit_die, DW_AT_comp_dir) == NULL) |
16499 | { | |
69278c24 | 16500 | bool p = false; |
16501 | htab_traverse (file_table, file_table_relative_p, &p); | |
16502 | if (p) | |
16503 | add_comp_dir_attribute (comp_unit_die); | |
83f77ecb | 16504 | } |
ff279357 | 16505 | |
89f29a1b | 16506 | for (i = 0; i < VEC_length (deferred_locations, deferred_locations_list); i++) |
16507 | { | |
16508 | add_location_or_const_value_attribute ( | |
16509 | VEC_index (deferred_locations, deferred_locations_list, i)->die, | |
16510 | VEC_index (deferred_locations, deferred_locations_list, i)->variable, | |
16511 | DW_AT_location); | |
16512 | } | |
16513 | ||
678d90bb | 16514 | /* Traverse the limbo die list, and add parent/child links. The only |
16515 | dies without parents that should be here are concrete instances of | |
16516 | inline functions, and the comp_unit_die. We can ignore the comp_unit_die. | |
16517 | For concrete instances, we can get the parent die from the abstract | |
16518 | instance. */ | |
16519 | for (node = limbo_die_list; node; node = next_node) | |
16520 | { | |
16521 | next_node = node->next; | |
16522 | die = node->die; | |
16523 | ||
16524 | if (die->die_parent == NULL) | |
16525 | { | |
c90bf86c | 16526 | dw_die_ref origin = get_AT_ref (die, DW_AT_abstract_origin); |
8c3f468d | 16527 | |
c90bf86c | 16528 | if (origin) |
16529 | add_child_die (origin->die_parent, die); | |
678d90bb | 16530 | else if (die == comp_unit_die) |
c90bf86c | 16531 | ; |
15a56411 | 16532 | else if (errorcount > 0 || sorrycount > 0) |
16533 | /* It's OK to be confused by errors in the input. */ | |
16534 | add_child_die (comp_unit_die, die); | |
7bd4f6b6 | 16535 | else |
15cfae4e | 16536 | { |
16537 | /* In certain situations, the lexical block containing a | |
16538 | nested function can be optimized away, which results | |
16539 | in the nested function die being orphaned. Likewise | |
16540 | with the return type of that nested function. Force | |
1b55e9dc | 16541 | this to be a child of the containing function. |
16542 | ||
16543 | It may happen that even the containing function got fully | |
16544 | inlined and optimized out. In that case we are lost and | |
16545 | assign the empty child. This should not be big issue as | |
16546 | the function is likely unreachable too. */ | |
7bd4f6b6 | 16547 | tree context = NULL_TREE; |
16548 | ||
16549 | gcc_assert (node->created_for); | |
16550 | ||
16551 | if (DECL_P (node->created_for)) | |
16552 | context = DECL_CONTEXT (node->created_for); | |
16553 | else if (TYPE_P (node->created_for)) | |
16554 | context = TYPE_CONTEXT (node->created_for); | |
8ff30ff6 | 16555 | |
356f311d | 16556 | gcc_assert (context |
16557 | && (TREE_CODE (context) == FUNCTION_DECL | |
16558 | || TREE_CODE (context) == NAMESPACE_DECL)); | |
8ff30ff6 | 16559 | |
15cfae4e | 16560 | origin = lookup_decl_die (context); |
1b55e9dc | 16561 | if (origin) |
16562 | add_child_die (origin, die); | |
68690e9c | 16563 | else |
16564 | add_child_die (comp_unit_die, die); | |
15cfae4e | 16565 | } |
678d90bb | 16566 | } |
678d90bb | 16567 | } |
8c3f468d | 16568 | |
c90bf86c | 16569 | limbo_die_list = NULL; |
678d90bb | 16570 | |
a4617d03 | 16571 | /* Walk through the list of incomplete types again, trying once more to |
16572 | emit full debugging info for them. */ | |
16573 | retry_incomplete_types (); | |
16574 | ||
449db731 | 16575 | if (flag_eliminate_unused_debug_types) |
16576 | prune_unused_types (); | |
16577 | ||
19f716e5 | 16578 | /* Generate separate CUs for each of the include files we've seen. |
16579 | They will go into limbo_die_list. */ | |
02749c22 | 16580 | if (flag_eliminate_dwarf2_dups) |
16581 | break_out_includes (comp_unit_die); | |
19f716e5 | 16582 | |
16583 | /* Traverse the DIE's and add add sibling attributes to those DIE's | |
16584 | that have children. */ | |
30ade641 | 16585 | add_sibling_attributes (comp_unit_die); |
19f716e5 | 16586 | for (node = limbo_die_list; node; node = node->next) |
16587 | add_sibling_attributes (node->die); | |
30ade641 | 16588 | |
16589 | /* Output a terminator label for the .text section. */ | |
2f14b1f9 | 16590 | switch_to_section (text_section); |
883b2e73 | 16591 | targetm.asm_out.internal_label (asm_out_file, TEXT_END_LABEL, 0); |
4d0e931f | 16592 | if (flag_reorder_blocks_and_partition) |
16593 | { | |
5fbee89d | 16594 | switch_to_section (unlikely_text_section ()); |
4d0e931f | 16595 | targetm.asm_out.internal_label (asm_out_file, COLD_END_LABEL, 0); |
16596 | } | |
30ade641 | 16597 | |
603796f0 | 16598 | /* We can only use the low/high_pc attributes if all of the code was |
16599 | in .text. */ | |
dae1861f | 16600 | if (!have_multiple_function_sections) |
603796f0 | 16601 | { |
16602 | add_AT_lbl_id (comp_unit_die, DW_AT_low_pc, text_section_label); | |
16603 | add_AT_lbl_id (comp_unit_die, DW_AT_high_pc, text_end_label); | |
c05d7491 | 16604 | } |
8c3f468d | 16605 | |
f221c0bd | 16606 | else |
16607 | { | |
16608 | unsigned fde_idx = 0; | |
16609 | ||
16610 | /* We need to give .debug_loc and .debug_ranges an appropriate | |
16611 | "base address". Use zero so that these addresses become | |
16612 | absolute. Historically, we've emitted the unexpected | |
16613 | DW_AT_entry_pc instead of DW_AT_low_pc for this purpose. | |
16614 | Emit both to give time for other tools to adapt. */ | |
16615 | add_AT_addr (comp_unit_die, DW_AT_low_pc, const0_rtx); | |
16616 | add_AT_addr (comp_unit_die, DW_AT_entry_pc, const0_rtx); | |
16617 | ||
16618 | add_AT_range_list (comp_unit_die, DW_AT_ranges, | |
16619 | add_ranges_by_labels (text_section_label, | |
16620 | text_end_label)); | |
16621 | if (flag_reorder_blocks_and_partition) | |
16622 | add_ranges_by_labels (cold_text_section_label, | |
16623 | cold_end_label); | |
16624 | ||
16625 | for (fde_idx = 0; fde_idx < fde_table_in_use; fde_idx++) | |
16626 | { | |
16627 | dw_fde_ref fde = &fde_table[fde_idx]; | |
16628 | ||
16629 | if (fde->dw_fde_switched_sections) | |
16630 | { | |
16631 | add_ranges_by_labels (fde->dw_fde_hot_section_label, | |
16632 | fde->dw_fde_hot_section_end_label); | |
16633 | add_ranges_by_labels (fde->dw_fde_unlikely_section_label, | |
16634 | fde->dw_fde_unlikely_section_end_label); | |
16635 | } | |
16636 | else | |
16637 | add_ranges_by_labels (fde->dw_fde_begin, | |
16638 | fde->dw_fde_end); | |
16639 | } | |
16640 | ||
16641 | add_ranges (NULL); | |
16642 | } | |
c05d7491 | 16643 | |
dae1861f | 16644 | /* Output location list section if necessary. */ |
16645 | if (have_location_lists) | |
16646 | { | |
16647 | /* Output the location lists info. */ | |
16648 | switch_to_section (debug_loc_section); | |
16649 | ASM_GENERATE_INTERNAL_LABEL (loc_section_label, | |
16650 | DEBUG_LOC_SECTION_LABEL, 0); | |
16651 | ASM_OUTPUT_LABEL (asm_out_file, loc_section_label); | |
16652 | output_location_lists (die); | |
16653 | } | |
16654 | ||
28833db5 | 16655 | if (debug_info_level >= DINFO_LEVEL_NORMAL) |
d08d29c0 | 16656 | add_AT_lineptr (comp_unit_die, DW_AT_stmt_list, |
16657 | debug_line_section_label); | |
603796f0 | 16658 | |
1d340a5e | 16659 | if (debug_info_level >= DINFO_LEVEL_VERBOSE) |
d08d29c0 | 16660 | add_AT_macptr (comp_unit_die, DW_AT_macro_info, macinfo_section_label); |
c90bf86c | 16661 | |
19f716e5 | 16662 | /* Output all of the compilation units. We put the main one last so that |
16663 | the offsets are available to output_pubnames. */ | |
16664 | for (node = limbo_die_list; node; node = node->next) | |
51e8c210 | 16665 | output_comp_unit (node->die, 0); |
8c3f468d | 16666 | |
e1b3cc49 | 16667 | /* Output the main compilation unit if non-empty or if .debug_macinfo |
16668 | has been emitted. */ | |
16669 | output_comp_unit (comp_unit_die, debug_info_level >= DINFO_LEVEL_VERBOSE); | |
19f716e5 | 16670 | |
30ade641 | 16671 | /* Output the abbreviation table. */ |
2f14b1f9 | 16672 | switch_to_section (debug_abbrev_section); |
30ade641 | 16673 | output_abbrev_section (); |
16674 | ||
8c3f468d | 16675 | /* Output public names table if necessary. */ |
af84796a | 16676 | if (!VEC_empty (pubname_entry, pubname_table)) |
dc7a29ce | 16677 | { |
2f14b1f9 | 16678 | switch_to_section (debug_pubnames_section); |
af84796a | 16679 | output_pubnames (pubname_table); |
dc7a29ce | 16680 | } |
16681 | ||
af84796a | 16682 | #ifdef DEBUG_PUBTYPES_SECTION |
16683 | /* Output public types table if necessary. */ | |
16684 | if (!VEC_empty (pubname_entry, pubtype_table)) | |
16685 | { | |
16686 | switch_to_section (debug_pubtypes_section); | |
16687 | output_pubnames (pubtype_table); | |
16688 | } | |
16689 | #endif | |
61a9389f | 16690 | |
8c3f468d | 16691 | /* Output the address range information. We only put functions in the arange |
16692 | table, so don't write it out if we don't have any. */ | |
30ade641 | 16693 | if (fde_table_in_use) |
16694 | { | |
2f14b1f9 | 16695 | switch_to_section (debug_aranges_section); |
30ade641 | 16696 | output_aranges (); |
16697 | } | |
a36145ca | 16698 | |
a36145ca | 16699 | /* Output ranges section if necessary. */ |
16700 | if (ranges_table_in_use) | |
16701 | { | |
2f14b1f9 | 16702 | switch_to_section (debug_ranges_section); |
fe39c28c | 16703 | ASM_OUTPUT_LABEL (asm_out_file, ranges_section_label); |
a36145ca | 16704 | output_ranges (); |
16705 | } | |
16706 | ||
69278c24 | 16707 | /* Output the source line correspondence table. We must do this |
16708 | even if there is no line information. Otherwise, on an empty | |
16709 | translation unit, we will generate a present, but empty, | |
16710 | .debug_info section. IRIX 6.5 `nm' will then complain when | |
16711 | examining the file. This is done late so that any filenames | |
16712 | used by the debug_info section are marked as 'used'. */ | |
16713 | if (! DWARF2_ASM_LINE_DEBUG_INFO) | |
16714 | { | |
16715 | switch_to_section (debug_line_section); | |
16716 | output_line_info (); | |
16717 | } | |
16718 | ||
156660d7 | 16719 | /* Have to end the macro section. */ |
c5c7e194 | 16720 | if (debug_info_level >= DINFO_LEVEL_VERBOSE) |
bc70bd5e | 16721 | { |
2f14b1f9 | 16722 | switch_to_section (debug_macinfo_section); |
323583a1 | 16723 | dw2_asm_output_data (1, 0, "End compilation unit"); |
c5c7e194 | 16724 | } |
80b7bd06 | 16725 | |
8c3f468d | 16726 | /* If we emitted any DW_FORM_strp form attribute, output the string |
80b7bd06 | 16727 | table too. */ |
16728 | if (debug_str_hash) | |
573aba85 | 16729 | htab_traverse (debug_str_hash, output_indirect_string, NULL); |
30ade641 | 16730 | } |
1f3233d1 | 16731 | #else |
16732 | ||
16733 | /* This should never be used, but its address is needed for comparisons. */ | |
16734 | const struct gcc_debug_hooks dwarf2_debug_hooks; | |
16735 | ||
16736 | #endif /* DWARF2_DEBUGGING_INFO */ | |
16737 | ||
16738 | #include "gt-dwarf2out.h" |