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ca29da43 | 1 | /* Read and write coverage files, and associated functionality. |
5624e564 | 2 | Copyright (C) 1990-2015 Free Software Foundation, Inc. |
ca29da43 NS |
3 | Contributed by James E. Wilson, UC Berkeley/Cygnus Support; |
4 | based on some ideas from Dain Samples of UC Berkeley. | |
5 | Further mangling by Bob Manson, Cygnus Support. | |
6 | Further mangled by Nathan Sidwell, CodeSourcery | |
7 | ||
8 | This file is part of GCC. | |
9 | ||
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 | |
9dcd6f09 | 12 | Software Foundation; either version 3, or (at your option) any later |
ca29da43 NS |
13 | version. |
14 | ||
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. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
21 | along with GCC; see the file COPYING3. If not see |
22 | <http://www.gnu.org/licenses/>. */ | |
ca29da43 NS |
23 | |
24 | ||
25 | #define GCOV_LINKAGE | |
26 | ||
27 | #include "config.h" | |
28 | #include "system.h" | |
29 | #include "coretypes.h" | |
c7131fb2 | 30 | #include "backend.h" |
957060b5 | 31 | #include "target.h" |
ca29da43 NS |
32 | #include "rtl.h" |
33 | #include "tree.h" | |
957060b5 AM |
34 | #include "tree-pass.h" |
35 | #include "tm_p.h" | |
d8a2d370 | 36 | #include "stringpool.h" |
957060b5 AM |
37 | #include "expmed.h" |
38 | #include "insn-config.h" | |
39 | #include "regs.h" | |
40 | #include "emit-rtl.h" | |
41 | #include "cgraph.h" | |
42 | #include "coverage.h" | |
43 | #include "diagnostic-core.h" | |
44 | #include "alias.h" | |
45 | #include "fold-const.h" | |
d8a2d370 | 46 | #include "stor-layout.h" |
ca29da43 NS |
47 | #include "flags.h" |
48 | #include "output.h" | |
36566b39 PK |
49 | #include "dojump.h" |
50 | #include "explow.h" | |
51 | #include "calls.h" | |
36566b39 PK |
52 | #include "varasm.h" |
53 | #include "stmt.h" | |
54 | #include "expr.h" | |
ca29da43 | 55 | #include "toplev.h" |
ca29da43 | 56 | #include "langhooks.h" |
c9b9aa64 | 57 | #include "tree-iterator.h" |
103ff0d6 TJ |
58 | #include "context.h" |
59 | #include "pass_manager.h" | |
650cfcab | 60 | #include "intl.h" |
2243ba51 | 61 | #include "params.h" |
be3c16c4 | 62 | #include "auto-profile.h" |
ca29da43 NS |
63 | |
64 | #include "gcov-io.c" | |
65 | ||
b724567e | 66 | struct GTY((chain_next ("%h.next"))) coverage_data |
ca29da43 | 67 | { |
b724567e | 68 | struct coverage_data *next; /* next function */ |
159b3be1 | 69 | unsigned ident; /* function ident */ |
10adac51 XDL |
70 | unsigned lineno_checksum; /* function lineno checksum */ |
71 | unsigned cfg_checksum; /* function cfg checksum */ | |
5366b186 NS |
72 | tree fn_decl; /* the function decl */ |
73 | tree ctr_vars[GCOV_COUNTERS]; /* counter variables. */ | |
ca29da43 NS |
74 | }; |
75 | ||
76 | /* Counts information for a function. */ | |
526ceb68 | 77 | struct counts_entry : pointer_hash <counts_entry> |
ca29da43 NS |
78 | { |
79 | /* We hash by */ | |
796621e8 | 80 | unsigned ident; |
cdb23767 | 81 | unsigned ctr; |
159b3be1 | 82 | |
ca29da43 | 83 | /* Store */ |
10adac51 XDL |
84 | unsigned lineno_checksum; |
85 | unsigned cfg_checksum; | |
ca29da43 | 86 | gcov_type *counts; |
cdb23767 | 87 | struct gcov_ctr_summary summary; |
5deac340 RG |
88 | |
89 | /* hash_table support. */ | |
67f58944 TS |
90 | static inline hashval_t hash (const counts_entry *); |
91 | static int equal (const counts_entry *, const counts_entry *); | |
92 | static void remove (counts_entry *); | |
526ceb68 | 93 | }; |
ca29da43 | 94 | |
b724567e NS |
95 | static GTY(()) struct coverage_data *functions_head = 0; |
96 | static struct coverage_data **functions_tail = &functions_head; | |
6d70e6be | 97 | static unsigned no_coverage = 0; |
ca29da43 | 98 | |
cdb23767 NS |
99 | /* Cumulative counter information for whole program. */ |
100 | static unsigned prg_ctr_mask; /* Mask of counter types generated. */ | |
ca29da43 | 101 | |
cdb23767 | 102 | /* Counter information for current function. */ |
71c0e7fc | 103 | static unsigned fn_ctr_mask; /* Mask of counters used. */ |
5366b186 | 104 | static GTY(()) tree fn_v_ctrs[GCOV_COUNTERS]; /* counter variables. */ |
6d70e6be NS |
105 | static unsigned fn_n_ctrs[GCOV_COUNTERS]; /* Counters allocated. */ |
106 | static unsigned fn_b_ctrs[GCOV_COUNTERS]; /* Allocation base. */ | |
ca29da43 | 107 | |
b724567e NS |
108 | /* Coverage info VAR_DECL and function info type nodes. */ |
109 | static GTY(()) tree gcov_info_var; | |
110 | static GTY(()) tree gcov_fn_info_type; | |
111 | static GTY(()) tree gcov_fn_info_ptr_type; | |
112 | ||
efbb59b2 SB |
113 | /* Name of the notes (gcno) output file. The "bbg" prefix is for |
114 | historical reasons, when the notes file contained only the | |
115 | basic block graph notes. | |
116 | If this is NULL we're not writing to the notes file. */ | |
ca29da43 | 117 | static char *bbg_file_name; |
ca29da43 | 118 | |
efbb59b2 | 119 | /* File stamp for notes file. */ |
cb686b99 NS |
120 | static unsigned bbg_file_stamp; |
121 | ||
efbb59b2 | 122 | /* Name of the count data (gcda) file. */ |
ca29da43 NS |
123 | static char *da_file_name; |
124 | ||
09780dfb | 125 | /* The names of merge functions for counters. */ |
c77556a5 RX |
126 | #define STR(str) #str |
127 | #define DEF_GCOV_COUNTER(COUNTER, NAME, FN_TYPE) STR(__gcov_merge ## FN_TYPE), | |
128 | static const char *const ctr_merge_functions[GCOV_COUNTERS] = { | |
129 | #include "gcov-counter.def" | |
130 | }; | |
131 | #undef DEF_GCOV_COUNTER | |
132 | #undef STR | |
133 | ||
134 | #define DEF_GCOV_COUNTER(COUNTER, NAME, FN_TYPE) NAME, | |
135 | static const char *const ctr_names[GCOV_COUNTERS] = { | |
136 | #include "gcov-counter.def" | |
137 | }; | |
138 | #undef DEF_GCOV_COUNTER | |
09780dfb | 139 | |
ca29da43 | 140 | /* Forward declarations. */ |
159b3be1 | 141 | static void read_counts_file (void); |
5366b186 NS |
142 | static tree build_var (tree, tree, int); |
143 | static void build_fn_info_type (tree, unsigned, tree); | |
b724567e NS |
144 | static void build_info_type (tree, tree); |
145 | static tree build_fn_info (const struct coverage_data *, tree, tree); | |
146 | static tree build_info (tree, tree); | |
147 | static bool coverage_obj_init (void); | |
9771b263 DN |
148 | static vec<constructor_elt, va_gc> *coverage_obj_fn |
149 | (vec<constructor_elt, va_gc> *, tree, struct coverage_data const *); | |
150 | static void coverage_obj_finish (vec<constructor_elt, va_gc> *); | |
251e2ff2 RS |
151 | \f |
152 | /* Return the type node for gcov_type. */ | |
153 | ||
154 | tree | |
155 | get_gcov_type (void) | |
156 | { | |
ef4bddc2 | 157 | machine_mode mode = smallest_mode_for_size (GCOV_TYPE_SIZE, MODE_INT); |
0f250839 | 158 | return lang_hooks.types.type_for_mode (mode, false); |
251e2ff2 RS |
159 | } |
160 | ||
161 | /* Return the type node for gcov_unsigned_t. */ | |
ca29da43 | 162 | |
251e2ff2 RS |
163 | static tree |
164 | get_gcov_unsigned_t (void) | |
165 | { | |
ef4bddc2 | 166 | machine_mode mode = smallest_mode_for_size (32, MODE_INT); |
0f250839 | 167 | return lang_hooks.types.type_for_mode (mode, true); |
251e2ff2 | 168 | } |
ca29da43 | 169 | \f |
0823efed | 170 | inline hashval_t |
67f58944 | 171 | counts_entry::hash (const counts_entry *entry) |
ca29da43 | 172 | { |
796621e8 | 173 | return entry->ident * GCOV_COUNTERS + entry->ctr; |
ca29da43 NS |
174 | } |
175 | ||
0823efed | 176 | inline int |
67f58944 | 177 | counts_entry::equal (const counts_entry *entry1, const counts_entry *entry2) |
ca29da43 | 178 | { |
796621e8 | 179 | return entry1->ident == entry2->ident && entry1->ctr == entry2->ctr; |
ca29da43 NS |
180 | } |
181 | ||
0823efed | 182 | inline void |
67f58944 | 183 | counts_entry::remove (counts_entry *entry) |
ca29da43 | 184 | { |
ca29da43 NS |
185 | free (entry->counts); |
186 | free (entry); | |
187 | } | |
188 | ||
0823efed | 189 | /* Hash table of count data. */ |
c203e8a7 | 190 | static hash_table<counts_entry> *counts_hash; |
0823efed | 191 | |
ca29da43 NS |
192 | /* Read in the counts file, if available. */ |
193 | ||
194 | static void | |
159b3be1 | 195 | read_counts_file (void) |
ca29da43 | 196 | { |
9b514d25 | 197 | gcov_unsigned_t fn_ident = 0; |
5366b186 NS |
198 | struct gcov_summary summary; |
199 | unsigned new_summary = 1; | |
7d63a2fa | 200 | gcov_unsigned_t tag; |
24a4a033 | 201 | int is_error = 0; |
10adac51 XDL |
202 | unsigned lineno_checksum = 0; |
203 | unsigned cfg_checksum = 0; | |
7d63a2fa | 204 | |
ca29da43 NS |
205 | if (!gcov_open (da_file_name, 1)) |
206 | return; | |
159b3be1 | 207 | |
160e2e4f | 208 | if (!gcov_magic (gcov_read_unsigned (), GCOV_DATA_MAGIC)) |
ca29da43 | 209 | { |
d4ee4d25 | 210 | warning (0, "%qs is not a gcov data file", da_file_name); |
ca29da43 NS |
211 | gcov_close (); |
212 | return; | |
213 | } | |
160e2e4f | 214 | else if ((tag = gcov_read_unsigned ()) != GCOV_VERSION) |
ca29da43 | 215 | { |
330d2e2a NS |
216 | char v[4], e[4]; |
217 | ||
218 | GCOV_UNSIGNED2STRING (v, tag); | |
219 | GCOV_UNSIGNED2STRING (e, GCOV_VERSION); | |
159b3be1 | 220 | |
d4ee4d25 | 221 | warning (0, "%qs is version %q.*s, expected version %q.*s", |
cb83302c | 222 | da_file_name, 4, v, 4, e); |
ca29da43 NS |
223 | gcov_close (); |
224 | return; | |
225 | } | |
159b3be1 | 226 | |
cb686b99 NS |
227 | /* Read the stamp, used for creating a generation count. */ |
228 | tag = gcov_read_unsigned (); | |
229 | bbg_file_stamp = crc32_unsigned (bbg_file_stamp, tag); | |
b8698a0f | 230 | |
c203e8a7 | 231 | counts_hash = new hash_table<counts_entry> (10); |
7d63a2fa | 232 | while ((tag = gcov_read_unsigned ())) |
ca29da43 | 233 | { |
7d63a2fa | 234 | gcov_unsigned_t length; |
9b514d25 | 235 | gcov_position_t offset; |
159b3be1 | 236 | |
ca29da43 NS |
237 | length = gcov_read_unsigned (); |
238 | offset = gcov_position (); | |
239 | if (tag == GCOV_TAG_FUNCTION) | |
240 | { | |
5366b186 | 241 | if (length) |
ca29da43 | 242 | { |
5366b186 NS |
243 | fn_ident = gcov_read_unsigned (); |
244 | lineno_checksum = gcov_read_unsigned (); | |
245 | cfg_checksum = gcov_read_unsigned (); | |
ca29da43 | 246 | } |
5366b186 NS |
247 | else |
248 | fn_ident = lineno_checksum = cfg_checksum = 0; | |
249 | new_summary = 1; | |
ca29da43 NS |
250 | } |
251 | else if (tag == GCOV_TAG_PROGRAM_SUMMARY) | |
252 | { | |
5366b186 NS |
253 | struct gcov_summary sum; |
254 | unsigned ix; | |
159b3be1 | 255 | |
5366b186 NS |
256 | if (new_summary) |
257 | memset (&summary, 0, sizeof (summary)); | |
159b3be1 | 258 | |
5366b186 NS |
259 | gcov_read_summary (&sum); |
260 | for (ix = 0; ix != GCOV_COUNTERS_SUMMABLE; ix++) | |
261 | { | |
262 | summary.ctrs[ix].runs += sum.ctrs[ix].runs; | |
263 | summary.ctrs[ix].sum_all += sum.ctrs[ix].sum_all; | |
264 | if (summary.ctrs[ix].run_max < sum.ctrs[ix].run_max) | |
265 | summary.ctrs[ix].run_max = sum.ctrs[ix].run_max; | |
266 | summary.ctrs[ix].sum_max += sum.ctrs[ix].sum_max; | |
ca29da43 | 267 | } |
9f71de84 TJ |
268 | if (new_summary) |
269 | memcpy (summary.ctrs[GCOV_COUNTER_ARCS].histogram, | |
270 | sum.ctrs[GCOV_COUNTER_ARCS].histogram, | |
271 | sizeof (gcov_bucket_type) * GCOV_HISTOGRAM_SIZE); | |
272 | else | |
273 | gcov_histogram_merge (summary.ctrs[GCOV_COUNTER_ARCS].histogram, | |
274 | sum.ctrs[GCOV_COUNTER_ARCS].histogram); | |
5366b186 | 275 | new_summary = 0; |
ca29da43 | 276 | } |
796621e8 | 277 | else if (GCOV_TAG_IS_COUNTER (tag) && fn_ident) |
ca29da43 | 278 | { |
526ceb68 | 279 | counts_entry **slot, *entry, elt; |
330d2e2a | 280 | unsigned n_counts = GCOV_TAG_COUNTER_NUM (length); |
ca29da43 NS |
281 | unsigned ix; |
282 | ||
796621e8 | 283 | elt.ident = fn_ident; |
cdb23767 | 284 | elt.ctr = GCOV_COUNTER_FOR_TAG (tag); |
ca29da43 | 285 | |
c203e8a7 | 286 | slot = counts_hash->find_slot (&elt, INSERT); |
ca29da43 NS |
287 | entry = *slot; |
288 | if (!entry) | |
289 | { | |
526ceb68 | 290 | *slot = entry = XCNEW (counts_entry); |
10adac51 | 291 | entry->ident = fn_ident; |
cdb23767 | 292 | entry->ctr = elt.ctr; |
10adac51 XDL |
293 | entry->lineno_checksum = lineno_checksum; |
294 | entry->cfg_checksum = cfg_checksum; | |
9f71de84 TJ |
295 | if (elt.ctr < GCOV_COUNTERS_SUMMABLE) |
296 | entry->summary = summary.ctrs[elt.ctr]; | |
297 | entry->summary.num = n_counts; | |
5ed6ace5 | 298 | entry->counts = XCNEWVEC (gcov_type, n_counts); |
ca29da43 | 299 | } |
10adac51 XDL |
300 | else if (entry->lineno_checksum != lineno_checksum |
301 | || entry->cfg_checksum != cfg_checksum) | |
ca29da43 | 302 | { |
10adac51 XDL |
303 | error ("Profile data for function %u is corrupted", fn_ident); |
304 | error ("checksum is (%x,%x) instead of (%x,%x)", | |
305 | entry->lineno_checksum, entry->cfg_checksum, | |
306 | lineno_checksum, cfg_checksum); | |
c203e8a7 TS |
307 | delete counts_hash; |
308 | counts_hash = NULL; | |
24a4a033 JH |
309 | break; |
310 | } | |
311 | else if (entry->summary.num != n_counts) | |
312 | { | |
10adac51 | 313 | error ("Profile data for function %u is corrupted", fn_ident); |
24a4a033 | 314 | error ("number of counters is %d instead of %d", entry->summary.num, n_counts); |
c203e8a7 TS |
315 | delete counts_hash; |
316 | counts_hash = NULL; | |
ca29da43 NS |
317 | break; |
318 | } | |
9b514d25 NS |
319 | else if (elt.ctr >= GCOV_COUNTERS_SUMMABLE) |
320 | { | |
24a4a033 JH |
321 | error ("cannot merge separate %s counters for function %u", |
322 | ctr_names[elt.ctr], fn_ident); | |
9b514d25 NS |
323 | goto skip_merge; |
324 | } | |
5366b186 | 325 | else |
ca29da43 | 326 | { |
5366b186 NS |
327 | entry->summary.runs += summary.ctrs[elt.ctr].runs; |
328 | entry->summary.sum_all += summary.ctrs[elt.ctr].sum_all; | |
329 | if (entry->summary.run_max < summary.ctrs[elt.ctr].run_max) | |
330 | entry->summary.run_max = summary.ctrs[elt.ctr].run_max; | |
331 | entry->summary.sum_max += summary.ctrs[elt.ctr].sum_max; | |
ca29da43 NS |
332 | } |
333 | for (ix = 0; ix != n_counts; ix++) | |
334 | entry->counts[ix] += gcov_read_counter (); | |
9b514d25 | 335 | skip_merge:; |
ca29da43 | 336 | } |
474f141e | 337 | gcov_sync (offset, length); |
24a4a033 | 338 | if ((is_error = gcov_is_error ())) |
00cf2913 | 339 | { |
971801ff | 340 | error (is_error < 0 ? "%qs has overflowed" : "%qs is corrupted", |
00cf2913 | 341 | da_file_name); |
c203e8a7 TS |
342 | delete counts_hash; |
343 | counts_hash = NULL; | |
00cf2913 NS |
344 | break; |
345 | } | |
7d63a2fa | 346 | } |
159b3be1 | 347 | |
ca29da43 NS |
348 | gcov_close (); |
349 | } | |
350 | ||
351 | /* Returns the counters for a particular tag. */ | |
352 | ||
353 | gcov_type * | |
cdb23767 | 354 | get_coverage_counts (unsigned counter, unsigned expected, |
10adac51 | 355 | unsigned cfg_checksum, unsigned lineno_checksum, |
cdb23767 | 356 | const struct gcov_ctr_summary **summary) |
ca29da43 | 357 | { |
526ceb68 | 358 | counts_entry *entry, elt; |
ca29da43 | 359 | |
71c0e7fc | 360 | /* No hash table, no counts. */ |
c203e8a7 | 361 | if (!counts_hash) |
ca29da43 NS |
362 | { |
363 | static int warned = 0; | |
364 | ||
103ff0d6 TJ |
365 | if (!warned++ && dump_enabled_p ()) |
366 | dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, input_location, | |
367 | (flag_guess_branch_prob | |
753b9bc3 | 368 | ? "file %s not found, execution counts estimated\n" |
103ff0d6 | 369 | : "file %s not found, execution counts assumed to " |
e645e942 | 370 | "be zero\n"), |
103ff0d6 | 371 | da_file_name); |
ca29da43 NS |
372 | return NULL; |
373 | } | |
2243ba51 XDL |
374 | if (PARAM_VALUE (PARAM_PROFILE_FUNC_INTERNAL_ID)) |
375 | elt.ident = current_function_funcdef_no + 1; | |
376 | else | |
377 | { | |
378 | gcc_assert (coverage_node_map_initialized_p ()); | |
379 | elt.ident = cgraph_node::get (cfun->decl)->profile_id; | |
380 | } | |
cdb23767 | 381 | elt.ctr = counter; |
c203e8a7 | 382 | entry = counts_hash->find (&elt); |
5366b186 NS |
383 | if (!entry || !entry->summary.num) |
384 | /* The function was not emitted, or is weak and not chosen in the | |
385 | final executable. Silently fail, because there's nothing we | |
386 | can do about it. */ | |
387 | return NULL; | |
388 | ||
10adac51 | 389 | if (entry->cfg_checksum != cfg_checksum |
16c1c158 | 390 | || entry->summary.num != expected) |
24a4a033 | 391 | { |
16c1c158 | 392 | static int warned = 0; |
650cfcab | 393 | bool warning_printed = false; |
4f1e4960 | 394 | tree id = DECL_ASSEMBLER_NAME (current_function_decl); |
16c1c158 | 395 | |
10adac51 XDL |
396 | warning_printed = |
397 | warning_at (input_location, OPT_Wcoverage_mismatch, | |
5366b186 | 398 | "the control flow of function %qE does not match " |
10adac51 | 399 | "its profile data (counter %qs)", id, ctr_names[counter]); |
103ff0d6 | 400 | if (warning_printed && dump_enabled_p ()) |
16c1c158 | 401 | { |
103ff0d6 TJ |
402 | dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, input_location, |
403 | "use -Wno-error=coverage-mismatch to tolerate " | |
404 | "the mismatch but performance may drop if the " | |
e645e942 | 405 | "function is hot\n"); |
650cfcab | 406 | |
1da2ed5f | 407 | if (!seen_error () |
650cfcab NV |
408 | && !warned++) |
409 | { | |
103ff0d6 | 410 | dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, input_location, |
e645e942 TJ |
411 | "coverage mismatch ignored\n"); |
412 | dump_printf (MSG_OPTIMIZED_LOCATIONS, | |
413 | flag_guess_branch_prob | |
414 | ? G_("execution counts estimated\n") | |
415 | : G_("execution counts assumed to be zero\n")); | |
650cfcab | 416 | if (!flag_guess_branch_prob) |
e645e942 TJ |
417 | dump_printf (MSG_OPTIMIZED_LOCATIONS, |
418 | "this can result in poorly optimized code\n"); | |
650cfcab | 419 | } |
16c1c158 RG |
420 | } |
421 | ||
422 | return NULL; | |
ca29da43 | 423 | } |
5366b186 NS |
424 | else if (entry->lineno_checksum != lineno_checksum) |
425 | { | |
2243ba51 XDL |
426 | warning (OPT_Wcoverage_mismatch, |
427 | "source locations for function %qE have changed," | |
5366b186 NS |
428 | " the profile data may be out of date", |
429 | DECL_ASSEMBLER_NAME (current_function_decl)); | |
430 | } | |
159b3be1 | 431 | |
cdb23767 NS |
432 | if (summary) |
433 | *summary = &entry->summary; | |
ca29da43 NS |
434 | |
435 | return entry->counts; | |
436 | } | |
cdb23767 | 437 | |
6356f892 | 438 | /* Allocate NUM counters of type COUNTER. Returns nonzero if the |
6d70e6be | 439 | allocation succeeded. */ |
cdb23767 | 440 | |
6d70e6be NS |
441 | int |
442 | coverage_counter_alloc (unsigned counter, unsigned num) | |
cdb23767 | 443 | { |
6d70e6be NS |
444 | if (no_coverage) |
445 | return 0; | |
159b3be1 | 446 | |
6d70e6be NS |
447 | if (!num) |
448 | return 1; | |
159b3be1 | 449 | |
5366b186 | 450 | if (!fn_v_ctrs[counter]) |
cdb23767 | 451 | { |
5366b186 NS |
452 | tree array_type = build_array_type (get_gcov_type (), NULL_TREE); |
453 | ||
454 | fn_v_ctrs[counter] | |
455 | = build_var (current_function_decl, array_type, counter); | |
cdb23767 | 456 | } |
5366b186 | 457 | |
6d70e6be NS |
458 | fn_b_ctrs[counter] = fn_n_ctrs[counter]; |
459 | fn_n_ctrs[counter] += num; | |
5366b186 | 460 | |
6d70e6be NS |
461 | fn_ctr_mask |= 1 << counter; |
462 | return 1; | |
463 | } | |
cdb23767 | 464 | |
6de9cd9a DN |
465 | /* Generate a tree to access COUNTER NO. */ |
466 | ||
467 | tree | |
468 | tree_coverage_counter_ref (unsigned counter, unsigned no) | |
469 | { | |
070e3969 | 470 | tree gcov_type_node = get_gcov_type (); |
6de9cd9a | 471 | |
341c100f | 472 | gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]); |
6de9cd9a | 473 | |
5366b186 NS |
474 | no += fn_b_ctrs[counter]; |
475 | ||
6de9cd9a | 476 | /* "no" here is an array index, scaled to bytes later. */ |
5366b186 | 477 | return build4 (ARRAY_REF, gcov_type_node, fn_v_ctrs[counter], |
f81b1a3d | 478 | build_int_cst (integer_type_node, no), NULL, NULL); |
6de9cd9a | 479 | } |
fc9161c1 RG |
480 | |
481 | /* Generate a tree to access the address of COUNTER NO. */ | |
482 | ||
483 | tree | |
484 | tree_coverage_counter_addr (unsigned counter, unsigned no) | |
485 | { | |
486 | tree gcov_type_node = get_gcov_type (); | |
487 | ||
488 | gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]); | |
5366b186 | 489 | no += fn_b_ctrs[counter]; |
628c189e | 490 | |
fc9161c1 RG |
491 | /* "no" here is an array index, scaled to bytes later. */ |
492 | return build_fold_addr_expr (build4 (ARRAY_REF, gcov_type_node, | |
5366b186 | 493 | fn_v_ctrs[counter], |
f81b1a3d | 494 | build_int_cst (integer_type_node, no), |
fc9161c1 RG |
495 | NULL, NULL)); |
496 | } | |
ca29da43 | 497 | \f |
10adac51 | 498 | |
ca29da43 | 499 | /* Generate a checksum for a string. CHKSUM is the current |
71c0e7fc | 500 | checksum. */ |
ca29da43 NS |
501 | |
502 | static unsigned | |
20c361f3 | 503 | coverage_checksum_string (unsigned chksum, const char *string) |
ca29da43 | 504 | { |
20c361f3 JH |
505 | int i; |
506 | char *dup = NULL; | |
507 | ||
508 | /* Look for everything that looks if it were produced by | |
5880f14f | 509 | get_file_function_name and zero out the second part |
20c361f3 JH |
510 | that may result from flag_random_seed. This is not critical |
511 | as the checksums are used only for sanity checking. */ | |
512 | for (i = 0; string[i]; i++) | |
ca29da43 | 513 | { |
2b557972 JH |
514 | int offset = 0; |
515 | if (!strncmp (string + i, "_GLOBAL__N_", 11)) | |
516 | offset = 11; | |
20c361f3 | 517 | if (!strncmp (string + i, "_GLOBAL__", 9)) |
2b557972 JH |
518 | offset = 9; |
519 | ||
520 | /* C++ namespaces do have scheme: | |
521 | _GLOBAL__N_<filename>_<wrongmagicnumber>_<magicnumber>functionname | |
522 | since filename might contain extra underscores there seems | |
523 | to be no better chance then walk all possible offsets looking | |
fa10beec | 524 | for magicnumber. */ |
2b557972 | 525 | if (offset) |
1f651229 JH |
526 | { |
527 | for (i = i + offset; string[i]; i++) | |
528 | if (string[i]=='_') | |
529 | { | |
530 | int y; | |
531 | ||
532 | for (y = 1; y < 9; y++) | |
533 | if (!(string[i + y] >= '0' && string[i + y] <= '9') | |
534 | && !(string[i + y] >= 'A' && string[i + y] <= 'F')) | |
535 | break; | |
536 | if (y != 9 || string[i + 9] != '_') | |
537 | continue; | |
538 | for (y = 10; y < 18; y++) | |
539 | if (!(string[i + y] >= '0' && string[i + y] <= '9') | |
540 | && !(string[i + y] >= 'A' && string[i + y] <= 'F')) | |
541 | break; | |
542 | if (y != 18) | |
543 | continue; | |
544 | if (!dup) | |
545 | string = dup = xstrdup (string); | |
546 | for (y = 10; y < 18; y++) | |
547 | dup[i + y] = '0'; | |
548 | } | |
549 | break; | |
550 | } | |
ca29da43 | 551 | } |
20c361f3 JH |
552 | |
553 | chksum = crc32_string (chksum, string); | |
04695783 | 554 | free (dup); |
159b3be1 | 555 | |
ca29da43 NS |
556 | return chksum; |
557 | } | |
558 | ||
559 | /* Compute checksum for the current function. We generate a CRC32. */ | |
560 | ||
10adac51 XDL |
561 | unsigned |
562 | coverage_compute_lineno_checksum (void) | |
ca29da43 | 563 | { |
a281759f PB |
564 | expanded_location xloc |
565 | = expand_location (DECL_SOURCE_LOCATION (current_function_decl)); | |
566 | unsigned chksum = xloc.line; | |
ca29da43 | 567 | |
a281759f | 568 | chksum = coverage_checksum_string (chksum, xloc.file); |
20c361f3 | 569 | chksum = coverage_checksum_string |
ca29da43 NS |
570 | (chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl))); |
571 | ||
572 | return chksum; | |
573 | } | |
10adac51 | 574 | |
2fa3d31b JH |
575 | /* Compute profile ID. This is better to be unique in whole program. */ |
576 | ||
577 | unsigned | |
578 | coverage_compute_profile_id (struct cgraph_node *n) | |
579 | { | |
cb90235d | 580 | unsigned chksum; |
2fa3d31b | 581 | |
cb90235d | 582 | /* Externally visible symbols have unique name. */ |
7e044261 | 583 | if (TREE_PUBLIC (n->decl) || DECL_EXTERNAL (n->decl) || n->unique_name) |
cb90235d JH |
584 | { |
585 | chksum = coverage_checksum_string | |
586 | (0, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (n->decl))); | |
587 | } | |
588 | else | |
589 | { | |
590 | expanded_location xloc | |
591 | = expand_location (DECL_SOURCE_LOCATION (n->decl)); | |
2243ba51 | 592 | bool use_name_only = (PARAM_VALUE (PARAM_PROFILE_FUNC_INTERNAL_ID) == 0); |
cb90235d | 593 | |
2243ba51 | 594 | chksum = (use_name_only ? 0 : xloc.line); |
cb90235d JH |
595 | chksum = coverage_checksum_string (chksum, xloc.file); |
596 | chksum = coverage_checksum_string | |
597 | (chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (n->decl))); | |
2243ba51 | 598 | if (!use_name_only && first_global_object_name) |
cb90235d JH |
599 | chksum = coverage_checksum_string |
600 | (chksum, first_global_object_name); | |
601 | chksum = coverage_checksum_string | |
602 | (chksum, aux_base_name); | |
603 | } | |
2fa3d31b | 604 | |
7e044261 JH |
605 | /* Non-negative integers are hopefully small enough to fit in all targets. |
606 | Gcov file formats wants non-zero function IDs. */ | |
607 | chksum = chksum & 0x7fffffff; | |
608 | return chksum + (!chksum); | |
2fa3d31b JH |
609 | } |
610 | ||
a96bf0d3 | 611 | /* Compute cfg checksum for the function FN given as argument. |
10adac51 XDL |
612 | The checksum is calculated carefully so that |
613 | source code changes that doesn't affect the control flow graph | |
614 | won't change the checksum. | |
615 | This is to make the profile data useable across source code change. | |
616 | The downside of this is that the compiler may use potentially | |
617 | wrong profile data - that the source code change has non-trivial impact | |
618 | on the validity of profile data (e.g. the reversed condition) | |
619 | but the compiler won't detect the change and use the wrong profile data. */ | |
620 | ||
621 | unsigned | |
a96bf0d3 | 622 | coverage_compute_cfg_checksum (struct function *fn) |
10adac51 XDL |
623 | { |
624 | basic_block bb; | |
a96bf0d3 | 625 | unsigned chksum = n_basic_blocks_for_fn (fn); |
10adac51 | 626 | |
a96bf0d3 | 627 | FOR_EACH_BB_FN (bb, fn) |
10adac51 XDL |
628 | { |
629 | edge e; | |
630 | edge_iterator ei; | |
631 | chksum = crc32_byte (chksum, bb->index); | |
632 | FOR_EACH_EDGE (e, ei, bb->succs) | |
633 | { | |
634 | chksum = crc32_byte (chksum, e->dest->index); | |
635 | } | |
636 | } | |
637 | ||
638 | return chksum; | |
639 | } | |
ca29da43 | 640 | \f |
efbb59b2 | 641 | /* Begin output to the notes file for the current function. |
b724567e | 642 | Writes the function header. Returns nonzero if data should be output. */ |
ca29da43 NS |
643 | |
644 | int | |
b724567e | 645 | coverage_begin_function (unsigned lineno_checksum, unsigned cfg_checksum) |
ca29da43 | 646 | { |
b724567e NS |
647 | expanded_location xloc; |
648 | unsigned long offset; | |
649 | ||
2f908293 SP |
650 | /* We don't need to output .gcno file unless we're under -ftest-coverage |
651 | (e.g. -fprofile-arcs/generate/use don't need .gcno to work). */ | |
b724567e | 652 | if (no_coverage || !bbg_file_name) |
6d70e6be | 653 | return 0; |
159b3be1 | 654 | |
b724567e | 655 | xloc = expand_location (DECL_SOURCE_LOCATION (current_function_decl)); |
10adac51 | 656 | |
b724567e NS |
657 | /* Announce function */ |
658 | offset = gcov_write_tag (GCOV_TAG_FUNCTION); | |
2243ba51 XDL |
659 | if (PARAM_VALUE (PARAM_PROFILE_FUNC_INTERNAL_ID)) |
660 | gcov_write_unsigned (current_function_funcdef_no + 1); | |
661 | else | |
662 | { | |
663 | gcc_assert (coverage_node_map_initialized_p ()); | |
664 | gcov_write_unsigned ( | |
665 | cgraph_node::get (current_function_decl)->profile_id); | |
666 | } | |
667 | ||
b724567e NS |
668 | gcov_write_unsigned (lineno_checksum); |
669 | gcov_write_unsigned (cfg_checksum); | |
670 | gcov_write_string (IDENTIFIER_POINTER | |
671 | (DECL_ASSEMBLER_NAME (current_function_decl))); | |
672 | gcov_write_string (xloc.file); | |
673 | gcov_write_unsigned (xloc.line); | |
674 | gcov_write_length (offset); | |
ca29da43 | 675 | |
ca29da43 NS |
676 | return !gcov_is_error (); |
677 | } | |
678 | ||
679 | /* Finish coverage data for the current function. Verify no output | |
680 | error has occurred. Save function coverage counts. */ | |
681 | ||
682 | void | |
10adac51 | 683 | coverage_end_function (unsigned lineno_checksum, unsigned cfg_checksum) |
ca29da43 NS |
684 | { |
685 | unsigned i; | |
159b3be1 | 686 | |
b724567e | 687 | if (bbg_file_name && gcov_is_error ()) |
159b3be1 | 688 | { |
d4ee4d25 | 689 | warning (0, "error writing %qs", bbg_file_name); |
b724567e NS |
690 | unlink (bbg_file_name); |
691 | bbg_file_name = NULL; | |
ca29da43 | 692 | } |
cdb23767 | 693 | |
2ac69a0c | 694 | if (fn_ctr_mask) |
cdb23767 | 695 | { |
2ac69a0c NS |
696 | struct coverage_data *item = 0; |
697 | ||
7e044261 | 698 | item = ggc_alloc<coverage_data> (); |
2243ba51 | 699 | |
7e044261 JH |
700 | if (PARAM_VALUE (PARAM_PROFILE_FUNC_INTERNAL_ID)) |
701 | item->ident = current_function_funcdef_no + 1; | |
702 | else | |
703 | { | |
704 | gcc_assert (coverage_node_map_initialized_p ()); | |
705 | item->ident = cgraph_node::get (cfun->decl)->profile_id; | |
2ac69a0c | 706 | } |
10adac51 | 707 | |
7e044261 JH |
708 | item->lineno_checksum = lineno_checksum; |
709 | item->cfg_checksum = cfg_checksum; | |
710 | ||
711 | item->fn_decl = current_function_decl; | |
712 | item->next = 0; | |
713 | *functions_tail = item; | |
714 | functions_tail = &item->next; | |
715 | ||
cdb23767 NS |
716 | for (i = 0; i != GCOV_COUNTERS; i++) |
717 | { | |
5366b186 | 718 | tree var = fn_v_ctrs[i]; |
2ac69a0c NS |
719 | |
720 | if (item) | |
721 | item->ctr_vars[i] = var; | |
5366b186 NS |
722 | if (var) |
723 | { | |
724 | tree array_type = build_index_type (size_int (fn_n_ctrs[i] - 1)); | |
725 | array_type = build_array_type (get_gcov_type (), array_type); | |
726 | TREE_TYPE (var) = array_type; | |
727 | DECL_SIZE (var) = TYPE_SIZE (array_type); | |
728 | DECL_SIZE_UNIT (var) = TYPE_SIZE_UNIT (array_type); | |
9041d2e6 | 729 | varpool_node::finalize_decl (var); |
5366b186 | 730 | } |
2ac69a0c | 731 | |
5366b186 NS |
732 | fn_b_ctrs[i] = fn_n_ctrs[i] = 0; |
733 | fn_v_ctrs[i] = NULL_TREE; | |
cdb23767 NS |
734 | } |
735 | prg_ctr_mask |= fn_ctr_mask; | |
736 | fn_ctr_mask = 0; | |
737 | } | |
ca29da43 NS |
738 | } |
739 | ||
5366b186 | 740 | /* Build a coverage variable of TYPE for function FN_DECL. If COUNTER |
0e485da0 | 741 | >= 0 it is a counter array, otherwise it is the function structure. */ |
ca29da43 | 742 | |
ca29da43 | 743 | static tree |
5366b186 NS |
744 | build_var (tree fn_decl, tree type, int counter) |
745 | { | |
746 | tree var = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL_TREE, type); | |
9e66e106 JJ |
747 | const char *fn_name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fn_decl)); |
748 | char *buf; | |
749 | size_t fn_name_len, len; | |
750 | ||
751 | fn_name = targetm.strip_name_encoding (fn_name); | |
752 | fn_name_len = strlen (fn_name); | |
753 | buf = XALLOCAVEC (char, fn_name_len + 8 + sizeof (int) * 3); | |
5366b186 | 754 | |
5366b186 | 755 | if (counter < 0) |
9e66e106 | 756 | strcpy (buf, "__gcov__"); |
5366b186 | 757 | else |
9e66e106 JJ |
758 | sprintf (buf, "__gcov%u_", counter); |
759 | len = strlen (buf); | |
760 | #ifndef NO_DOT_IN_LABEL | |
761 | buf[len - 1] = '.'; | |
762 | #elif !defined NO_DOLLAR_IN_LABEL | |
763 | buf[len - 1] = '$'; | |
764 | #endif | |
765 | memcpy (buf + len, fn_name, fn_name_len + 1); | |
5366b186 | 766 | DECL_NAME (var) = get_identifier (buf); |
89b0c303 NS |
767 | TREE_STATIC (var) = 1; |
768 | TREE_ADDRESSABLE (var) = 1; | |
400a4f6c | 769 | DECL_NONALIASED (var) = 1; |
89b0c303 | 770 | DECL_ALIGN (var) = TYPE_ALIGN (type); |
5366b186 NS |
771 | |
772 | return var; | |
773 | } | |
774 | ||
775 | /* Creates the gcov_fn_info RECORD_TYPE. */ | |
776 | ||
777 | static void | |
778 | build_fn_info_type (tree type, unsigned counters, tree gcov_info_type) | |
ca29da43 | 779 | { |
5366b186 | 780 | tree ctr_info = lang_hooks.types.make_type (RECORD_TYPE); |
ca29da43 | 781 | tree field, fields; |
cdb23767 | 782 | tree array_type; |
159b3be1 | 783 | |
5366b186 NS |
784 | gcc_assert (counters); |
785 | ||
786 | /* ctr_info::num */ | |
787 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
788 | get_gcov_unsigned_t ()); | |
789 | fields = field; | |
790 | ||
791 | /* ctr_info::values */ | |
792 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
793 | build_pointer_type (get_gcov_type ())); | |
794 | DECL_CHAIN (field) = fields; | |
795 | fields = field; | |
796 | ||
797 | finish_builtin_struct (ctr_info, "__gcov_ctr_info", fields, NULL_TREE); | |
798 | ||
799 | /* key */ | |
800 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
801 | build_pointer_type (build_qualified_type | |
802 | (gcov_info_type, TYPE_QUAL_CONST))); | |
803 | fields = field; | |
804 | ||
796621e8 | 805 | /* ident */ |
5366b186 NS |
806 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
807 | get_gcov_unsigned_t ()); | |
808 | DECL_CHAIN (field) = fields; | |
809 | fields = field; | |
810 | ||
10adac51 | 811 | /* lineno_checksum */ |
5366b186 NS |
812 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
813 | get_gcov_unsigned_t ()); | |
910ad8de | 814 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
815 | fields = field; |
816 | ||
10adac51 | 817 | /* cfg checksum */ |
5366b186 NS |
818 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
819 | get_gcov_unsigned_t ()); | |
10adac51 XDL |
820 | DECL_CHAIN (field) = fields; |
821 | fields = field; | |
822 | ||
f81b1a3d | 823 | array_type = build_index_type (size_int (counters - 1)); |
5366b186 | 824 | array_type = build_array_type (ctr_info, array_type); |
159b3be1 | 825 | |
ca29da43 | 826 | /* counters */ |
5366b186 | 827 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, array_type); |
910ad8de | 828 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
829 | fields = field; |
830 | ||
cdb23767 | 831 | finish_builtin_struct (type, "__gcov_fn_info", fields, NULL_TREE); |
ca29da43 NS |
832 | } |
833 | ||
b724567e NS |
834 | /* Returns a CONSTRUCTOR for a gcov_fn_info. DATA is |
835 | the coverage data for the function and TYPE is the gcov_fn_info | |
836 | RECORD_TYPE. KEY is the object file key. */ | |
cdb23767 | 837 | |
ca29da43 | 838 | static tree |
b724567e | 839 | build_fn_info (const struct coverage_data *data, tree type, tree key) |
ca29da43 | 840 | { |
cdb23767 | 841 | tree fields = TYPE_FIELDS (type); |
5366b186 | 842 | tree ctr_type; |
cdb23767 | 843 | unsigned ix; |
9771b263 DN |
844 | vec<constructor_elt, va_gc> *v1 = NULL; |
845 | vec<constructor_elt, va_gc> *v2 = NULL; | |
159b3be1 | 846 | |
5366b186 NS |
847 | /* key */ |
848 | CONSTRUCTOR_APPEND_ELT (v1, fields, | |
849 | build1 (ADDR_EXPR, TREE_TYPE (fields), key)); | |
850 | fields = DECL_CHAIN (fields); | |
851 | ||
796621e8 | 852 | /* ident */ |
f9b36bb3 KH |
853 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
854 | build_int_cstu (get_gcov_unsigned_t (), | |
b724567e | 855 | data->ident)); |
910ad8de | 856 | fields = DECL_CHAIN (fields); |
159b3be1 | 857 | |
10adac51 XDL |
858 | /* lineno_checksum */ |
859 | CONSTRUCTOR_APPEND_ELT (v1, fields, | |
860 | build_int_cstu (get_gcov_unsigned_t (), | |
b724567e | 861 | data->lineno_checksum)); |
10adac51 XDL |
862 | fields = DECL_CHAIN (fields); |
863 | ||
864 | /* cfg_checksum */ | |
f9b36bb3 KH |
865 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
866 | build_int_cstu (get_gcov_unsigned_t (), | |
b724567e | 867 | data->cfg_checksum)); |
910ad8de | 868 | fields = DECL_CHAIN (fields); |
159b3be1 | 869 | |
ca29da43 | 870 | /* counters */ |
5366b186 | 871 | ctr_type = TREE_TYPE (TREE_TYPE (fields)); |
cdb23767 NS |
872 | for (ix = 0; ix != GCOV_COUNTERS; ix++) |
873 | if (prg_ctr_mask & (1 << ix)) | |
5366b186 | 874 | { |
9771b263 | 875 | vec<constructor_elt, va_gc> *ctr = NULL; |
b724567e | 876 | tree var = data->ctr_vars[ix]; |
5366b186 NS |
877 | unsigned count = 0; |
878 | ||
879 | if (var) | |
880 | count | |
9439e9a1 | 881 | = tree_to_shwi (TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (var)))) |
5366b186 NS |
882 | + 1; |
883 | ||
884 | CONSTRUCTOR_APPEND_ELT (ctr, TYPE_FIELDS (ctr_type), | |
885 | build_int_cstu (get_gcov_unsigned_t (), | |
886 | count)); | |
887 | ||
888 | if (var) | |
889 | CONSTRUCTOR_APPEND_ELT (ctr, DECL_CHAIN (TYPE_FIELDS (ctr_type)), | |
890 | build_fold_addr_expr (var)); | |
891 | ||
892 | CONSTRUCTOR_APPEND_ELT (v2, NULL, build_constructor (ctr_type, ctr)); | |
893 | } | |
894 | ||
f9b36bb3 KH |
895 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
896 | build_constructor (TREE_TYPE (fields), v2)); | |
159b3be1 | 897 | |
f9b36bb3 | 898 | return build_constructor (type, v1); |
ca29da43 NS |
899 | } |
900 | ||
b724567e NS |
901 | /* Create gcov_info struct. TYPE is the incomplete RECORD_TYPE to be |
902 | completed, and FN_INFO_PTR_TYPE is a pointer to the function info type. */ | |
cdb23767 | 903 | |
5366b186 | 904 | static void |
b724567e | 905 | build_info_type (tree type, tree fn_info_ptr_type) |
ca29da43 | 906 | { |
cdb23767 | 907 | tree field, fields = NULL_TREE; |
b724567e | 908 | tree merge_fn_type; |
9b514d25 | 909 | |
5366b186 NS |
910 | /* Version ident */ |
911 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
912 | get_gcov_unsigned_t ()); | |
910ad8de | 913 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
914 | fields = field; |
915 | ||
5366b186 NS |
916 | /* next pointer */ |
917 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
918 | build_pointer_type (build_qualified_type | |
919 | (type, TYPE_QUAL_CONST))); | |
910ad8de | 920 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
921 | fields = field; |
922 | ||
5366b186 NS |
923 | /* stamp */ |
924 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
925 | get_gcov_unsigned_t ()); | |
910ad8de | 926 | DECL_CHAIN (field) = fields; |
09780dfb ZD |
927 | fields = field; |
928 | ||
5366b186 NS |
929 | /* Filename */ |
930 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
931 | build_pointer_type (build_qualified_type | |
932 | (char_type_node, TYPE_QUAL_CONST))); | |
933 | DECL_CHAIN (field) = fields; | |
934 | fields = field; | |
ca29da43 | 935 | |
5366b186 NS |
936 | /* merge fn array */ |
937 | merge_fn_type | |
938 | = build_function_type_list (void_type_node, | |
939 | build_pointer_type (get_gcov_type ()), | |
940 | get_gcov_unsigned_t (), NULL_TREE); | |
941 | merge_fn_type | |
942 | = build_array_type (build_pointer_type (merge_fn_type), | |
943 | build_index_type (size_int (GCOV_COUNTERS - 1))); | |
944 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
945 | merge_fn_type); | |
946 | DECL_CHAIN (field) = fields; | |
947 | fields = field; | |
948 | ||
949 | /* n_functions */ | |
950 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
951 | get_gcov_unsigned_t ()); | |
952 | DECL_CHAIN (field) = fields; | |
953 | fields = field; | |
954 | ||
b724567e NS |
955 | /* function_info pointer pointer */ |
956 | fn_info_ptr_type = build_pointer_type | |
957 | (build_qualified_type (fn_info_ptr_type, TYPE_QUAL_CONST)); | |
5366b186 | 958 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
b724567e | 959 | fn_info_ptr_type); |
5366b186 NS |
960 | DECL_CHAIN (field) = fields; |
961 | fields = field; | |
09780dfb | 962 | |
5366b186 | 963 | finish_builtin_struct (type, "__gcov_info", fields, NULL_TREE); |
ca29da43 NS |
964 | } |
965 | ||
b724567e NS |
966 | /* Returns a CONSTRUCTOR for the gcov_info object. INFO_TYPE is the |
967 | gcov_info structure type, FN_ARY is the array of pointers to | |
968 | function info objects. */ | |
cdb23767 | 969 | |
ca29da43 | 970 | static tree |
b724567e | 971 | build_info (tree info_type, tree fn_ary) |
ca29da43 | 972 | { |
5366b186 | 973 | tree info_fields = TYPE_FIELDS (info_type); |
b724567e | 974 | tree merge_fn_type, n_funcs; |
5366b186 | 975 | unsigned ix; |
cdb23767 | 976 | tree filename_string; |
2f908293 | 977 | int da_file_name_len; |
9771b263 DN |
978 | vec<constructor_elt, va_gc> *v1 = NULL; |
979 | vec<constructor_elt, va_gc> *v2 = NULL; | |
159b3be1 | 980 | |
cdb23767 | 981 | /* Version ident */ |
5366b186 NS |
982 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
983 | build_int_cstu (TREE_TYPE (info_fields), | |
984 | GCOV_VERSION)); | |
985 | info_fields = DECL_CHAIN (info_fields); | |
159b3be1 | 986 | |
ca29da43 | 987 | /* next -- NULL */ |
5366b186 NS |
988 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, null_pointer_node); |
989 | info_fields = DECL_CHAIN (info_fields); | |
990 | ||
dd486eb2 | 991 | /* stamp */ |
5366b186 NS |
992 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
993 | build_int_cstu (TREE_TYPE (info_fields), | |
cb686b99 | 994 | bbg_file_stamp)); |
5366b186 | 995 | info_fields = DECL_CHAIN (info_fields); |
dd486eb2 | 996 | |
ca29da43 | 997 | /* Filename */ |
2f908293 SP |
998 | da_file_name_len = strlen (da_file_name); |
999 | filename_string = build_string (da_file_name_len + 1, da_file_name); | |
4a90aeeb | 1000 | TREE_TYPE (filename_string) = build_array_type |
f81b1a3d | 1001 | (char_type_node, build_index_type (size_int (da_file_name_len))); |
5366b186 NS |
1002 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
1003 | build1 (ADDR_EXPR, TREE_TYPE (info_fields), | |
1004 | filename_string)); | |
1005 | info_fields = DECL_CHAIN (info_fields); | |
159b3be1 | 1006 | |
5366b186 NS |
1007 | /* merge fn array -- NULL slots indicate unmeasured counters */ |
1008 | merge_fn_type = TREE_TYPE (TREE_TYPE (info_fields)); | |
1009 | for (ix = 0; ix != GCOV_COUNTERS; ix++) | |
ca29da43 | 1010 | { |
5366b186 | 1011 | tree ptr = null_pointer_node; |
159b3be1 | 1012 | |
5366b186 NS |
1013 | if ((1u << ix) & prg_ctr_mask) |
1014 | { | |
1015 | tree merge_fn = build_decl (BUILTINS_LOCATION, | |
1016 | FUNCTION_DECL, | |
1017 | get_identifier (ctr_merge_functions[ix]), | |
1018 | TREE_TYPE (merge_fn_type)); | |
1019 | DECL_EXTERNAL (merge_fn) = 1; | |
1020 | TREE_PUBLIC (merge_fn) = 1; | |
1021 | DECL_ARTIFICIAL (merge_fn) = 1; | |
1022 | TREE_NOTHROW (merge_fn) = 1; | |
1023 | /* Initialize assembler name so we can stream out. */ | |
1024 | DECL_ASSEMBLER_NAME (merge_fn); | |
1025 | ptr = build1 (ADDR_EXPR, merge_fn_type, merge_fn); | |
1026 | } | |
1027 | CONSTRUCTOR_APPEND_ELT (v2, NULL, ptr); | |
ca29da43 | 1028 | } |
5366b186 NS |
1029 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
1030 | build_constructor (TREE_TYPE (info_fields), v2)); | |
1031 | info_fields = DECL_CHAIN (info_fields); | |
1032 | ||
1033 | /* n_functions */ | |
b724567e NS |
1034 | n_funcs = TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (fn_ary))); |
1035 | n_funcs = fold_build2 (PLUS_EXPR, TREE_TYPE (info_fields), | |
1036 | n_funcs, size_one_node); | |
1037 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, n_funcs); | |
5366b186 | 1038 | info_fields = DECL_CHAIN (info_fields); |
5366b186 | 1039 | |
b724567e | 1040 | /* functions */ |
5366b186 | 1041 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
b724567e NS |
1042 | build1 (ADDR_EXPR, TREE_TYPE (info_fields), fn_ary)); |
1043 | info_fields = DECL_CHAIN (info_fields); | |
1044 | ||
1045 | gcc_assert (!info_fields); | |
5366b186 | 1046 | return build_constructor (info_type, v1); |
ca29da43 NS |
1047 | } |
1048 | ||
d6d7eee1 GW |
1049 | /* Generate the constructor function to call __gcov_init. */ |
1050 | ||
1051 | static void | |
1052 | build_init_ctor (tree gcov_info_type) | |
1053 | { | |
1054 | tree ctor, stmt, init_fn; | |
1055 | ||
1056 | /* Build a decl for __gcov_init. */ | |
1057 | init_fn = build_pointer_type (gcov_info_type); | |
1058 | init_fn = build_function_type_list (void_type_node, init_fn, NULL); | |
1059 | init_fn = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, | |
1060 | get_identifier ("__gcov_init"), init_fn); | |
1061 | TREE_PUBLIC (init_fn) = 1; | |
1062 | DECL_EXTERNAL (init_fn) = 1; | |
1063 | DECL_ASSEMBLER_NAME (init_fn); | |
1064 | ||
1065 | /* Generate a call to __gcov_init(&gcov_info). */ | |
1066 | ctor = NULL; | |
1067 | stmt = build_fold_addr_expr (gcov_info_var); | |
1068 | stmt = build_call_expr (init_fn, 1, stmt); | |
1069 | append_to_statement_list (stmt, &ctor); | |
1070 | ||
1071 | /* Generate a constructor to run it. */ | |
1072 | cgraph_build_static_cdtor ('I', ctor, DEFAULT_INIT_PRIORITY); | |
1073 | } | |
1074 | ||
b724567e NS |
1075 | /* Create the gcov_info types and object. Generate the constructor |
1076 | function to call __gcov_init. Does not generate the initializer | |
1077 | for the object. Returns TRUE if coverage data is being emitted. */ | |
ca29da43 | 1078 | |
b724567e NS |
1079 | static bool |
1080 | coverage_obj_init (void) | |
ca29da43 | 1081 | { |
d6d7eee1 | 1082 | tree gcov_info_type; |
b724567e | 1083 | unsigned n_counters = 0; |
5366b186 | 1084 | unsigned ix; |
b724567e NS |
1085 | struct coverage_data *fn; |
1086 | struct coverage_data **fn_prev; | |
c9b9aa64 | 1087 | char name_buf[32]; |
ca29da43 | 1088 | |
6d70e6be | 1089 | no_coverage = 1; /* Disable any further coverage. */ |
159b3be1 | 1090 | |
cdb23767 | 1091 | if (!prg_ctr_mask) |
b724567e | 1092 | return false; |
159b3be1 | 1093 | |
3dafb85c ML |
1094 | if (symtab->dump_file) |
1095 | fprintf (symtab->dump_file, "Using data file %s\n", da_file_name); | |
ca29da43 | 1096 | |
b724567e | 1097 | /* Prune functions. */ |
5366b186 NS |
1098 | for (fn_prev = &functions_head; (fn = *fn_prev);) |
1099 | if (DECL_STRUCT_FUNCTION (fn->fn_decl)) | |
b724567e | 1100 | fn_prev = &fn->next; |
5366b186 NS |
1101 | else |
1102 | /* The function is not being emitted, remove from list. */ | |
1103 | *fn_prev = fn->next; | |
b724567e | 1104 | |
0f9fb22f JJ |
1105 | if (functions_head == NULL) |
1106 | return false; | |
1107 | ||
b724567e NS |
1108 | for (ix = 0; ix != GCOV_COUNTERS; ix++) |
1109 | if ((1u << ix) & prg_ctr_mask) | |
1110 | n_counters++; | |
5366b186 NS |
1111 | |
1112 | /* Build the info and fn_info types. These are mutually recursive. */ | |
1113 | gcov_info_type = lang_hooks.types.make_type (RECORD_TYPE); | |
b724567e | 1114 | gcov_fn_info_type = lang_hooks.types.make_type (RECORD_TYPE); |
dafb7b56 JH |
1115 | build_fn_info_type (gcov_fn_info_type, n_counters, gcov_info_type); |
1116 | gcov_info_type = lang_hooks.types.make_type (RECORD_TYPE); | |
b724567e NS |
1117 | gcov_fn_info_ptr_type = build_pointer_type |
1118 | (build_qualified_type (gcov_fn_info_type, TYPE_QUAL_CONST)); | |
b724567e | 1119 | build_info_type (gcov_info_type, gcov_fn_info_ptr_type); |
5366b186 NS |
1120 | |
1121 | /* Build the gcov info var, this is referred to in its own | |
1122 | initializer. */ | |
b724567e NS |
1123 | gcov_info_var = build_decl (BUILTINS_LOCATION, |
1124 | VAR_DECL, NULL_TREE, gcov_info_type); | |
1125 | TREE_STATIC (gcov_info_var) = 1; | |
c9b9aa64 | 1126 | ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 0); |
b724567e | 1127 | DECL_NAME (gcov_info_var) = get_identifier (name_buf); |
ca29da43 | 1128 | |
d6d7eee1 | 1129 | build_init_ctor (gcov_info_type); |
b724567e NS |
1130 | |
1131 | return true; | |
ca29da43 | 1132 | } |
b724567e NS |
1133 | |
1134 | /* Generate the coverage function info for FN and DATA. Append a | |
1135 | pointer to that object to CTOR and return the appended CTOR. */ | |
1136 | ||
9771b263 DN |
1137 | static vec<constructor_elt, va_gc> * |
1138 | coverage_obj_fn (vec<constructor_elt, va_gc> *ctor, tree fn, | |
b724567e NS |
1139 | struct coverage_data const *data) |
1140 | { | |
1141 | tree init = build_fn_info (data, gcov_fn_info_type, gcov_info_var); | |
1142 | tree var = build_var (fn, gcov_fn_info_type, -1); | |
1143 | ||
1144 | DECL_INITIAL (var) = init; | |
9041d2e6 | 1145 | varpool_node::finalize_decl (var); |
b724567e NS |
1146 | |
1147 | CONSTRUCTOR_APPEND_ELT (ctor, NULL, | |
1148 | build1 (ADDR_EXPR, gcov_fn_info_ptr_type, var)); | |
1149 | return ctor; | |
1150 | } | |
1151 | ||
1152 | /* Finalize the coverage data. Generates the array of pointers to | |
1153 | function objects from CTOR. Generate the gcov_info initializer. */ | |
1154 | ||
1155 | static void | |
9771b263 | 1156 | coverage_obj_finish (vec<constructor_elt, va_gc> *ctor) |
b724567e | 1157 | { |
9771b263 | 1158 | unsigned n_functions = vec_safe_length (ctor); |
b724567e NS |
1159 | tree fn_info_ary_type = build_array_type |
1160 | (build_qualified_type (gcov_fn_info_ptr_type, TYPE_QUAL_CONST), | |
1161 | build_index_type (size_int (n_functions - 1))); | |
1162 | tree fn_info_ary = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL_TREE, | |
1163 | fn_info_ary_type); | |
1164 | char name_buf[32]; | |
1165 | ||
1166 | TREE_STATIC (fn_info_ary) = 1; | |
1167 | ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 1); | |
1168 | DECL_NAME (fn_info_ary) = get_identifier (name_buf); | |
1169 | DECL_INITIAL (fn_info_ary) = build_constructor (fn_info_ary_type, ctor); | |
9041d2e6 | 1170 | varpool_node::finalize_decl (fn_info_ary); |
b724567e NS |
1171 | |
1172 | DECL_INITIAL (gcov_info_var) | |
1173 | = build_info (TREE_TYPE (gcov_info_var), fn_info_ary); | |
9041d2e6 | 1174 | varpool_node::finalize_decl (gcov_info_var); |
b724567e NS |
1175 | } |
1176 | ||
ca29da43 | 1177 | /* Perform file-level initialization. Read in data file, generate name |
efbb59b2 | 1178 | of notes file. */ |
ca29da43 NS |
1179 | |
1180 | void | |
159b3be1 | 1181 | coverage_init (const char *filename) |
ca29da43 NS |
1182 | { |
1183 | int len = strlen (filename); | |
b724567e | 1184 | int prefix_len = 0; |
b8698a0f | 1185 | |
103ff0d6 TJ |
1186 | /* Since coverage_init is invoked very early, before the pass |
1187 | manager, we need to set up the dumping explicitly. This is | |
1188 | similar to the handling in finish_optimization_passes. */ | |
47e0da37 DM |
1189 | int profile_pass_num = |
1190 | g->get_passes ()->get_pass_profile ()->static_pass_number; | |
1191 | g->get_dumps ()->dump_start (profile_pass_num, NULL); | |
103ff0d6 | 1192 | |
b724567e | 1193 | if (!profile_data_prefix && !IS_ABSOLUTE_PATH (filename)) |
2f908293 SP |
1194 | profile_data_prefix = getpwd (); |
1195 | ||
b724567e NS |
1196 | if (profile_data_prefix) |
1197 | prefix_len = strlen (profile_data_prefix); | |
ca29da43 | 1198 | |
796621e8 | 1199 | /* Name of da file. */ |
b8698a0f | 1200 | da_file_name = XNEWVEC (char, len + strlen (GCOV_DATA_SUFFIX) |
b724567e | 1201 | + prefix_len + 2); |
2f908293 SP |
1202 | |
1203 | if (profile_data_prefix) | |
1204 | { | |
b724567e NS |
1205 | memcpy (da_file_name, profile_data_prefix, prefix_len); |
1206 | da_file_name[prefix_len++] = '/'; | |
2f908293 | 1207 | } |
b724567e NS |
1208 | memcpy (da_file_name + prefix_len, filename, len); |
1209 | strcpy (da_file_name + prefix_len + len, GCOV_DATA_SUFFIX); | |
159b3be1 | 1210 | |
cb686b99 NS |
1211 | bbg_file_stamp = local_tick; |
1212 | ||
be3c16c4 DC |
1213 | if (flag_auto_profile) |
1214 | read_autofdo_file (); | |
1215 | else if (flag_branch_probabilities) | |
cb686b99 NS |
1216 | read_counts_file (); |
1217 | ||
796621e8 | 1218 | /* Name of bbg file. */ |
b724567e NS |
1219 | if (flag_test_coverage && !flag_compare_debug) |
1220 | { | |
1221 | bbg_file_name = XNEWVEC (char, len + strlen (GCOV_NOTE_SUFFIX) + 1); | |
1222 | memcpy (bbg_file_name, filename, len); | |
1223 | strcpy (bbg_file_name + len, GCOV_NOTE_SUFFIX); | |
1224 | ||
1225 | if (!gcov_open (bbg_file_name, -1)) | |
1226 | { | |
1227 | error ("cannot open %s", bbg_file_name); | |
1228 | bbg_file_name = NULL; | |
1229 | } | |
1230 | else | |
1231 | { | |
1232 | gcov_write_unsigned (GCOV_NOTE_MAGIC); | |
1233 | gcov_write_unsigned (GCOV_VERSION); | |
cb686b99 | 1234 | gcov_write_unsigned (bbg_file_stamp); |
b724567e NS |
1235 | } |
1236 | } | |
103ff0d6 | 1237 | |
47e0da37 | 1238 | g->get_dumps ()->dump_finish (profile_pass_num); |
ca29da43 NS |
1239 | } |
1240 | ||
efbb59b2 | 1241 | /* Performs file-level cleanup. Close notes file, generate coverage |
ca29da43 NS |
1242 | variables and constructor. */ |
1243 | ||
1244 | void | |
159b3be1 | 1245 | coverage_finish (void) |
ca29da43 | 1246 | { |
b724567e NS |
1247 | if (bbg_file_name && gcov_close ()) |
1248 | unlink (bbg_file_name); | |
cb686b99 NS |
1249 | |
1250 | if (!flag_branch_probabilities && flag_test_coverage | |
1251 | && (!local_tick || local_tick == (unsigned)-1)) | |
1252 | /* Only remove the da file, if we're emitting coverage code and | |
1253 | cannot uniquely stamp it. If we can stamp it, libgcov will DTRT. */ | |
b724567e NS |
1254 | unlink (da_file_name); |
1255 | ||
1256 | if (coverage_obj_init ()) | |
ca29da43 | 1257 | { |
9771b263 | 1258 | vec<constructor_elt, va_gc> *fn_ctor = NULL; |
b724567e NS |
1259 | struct coverage_data *fn; |
1260 | ||
1261 | for (fn = functions_head; fn; fn = fn->next) | |
1262 | fn_ctor = coverage_obj_fn (fn_ctor, fn->fn_decl, fn); | |
1263 | coverage_obj_finish (fn_ctor); | |
ca29da43 | 1264 | } |
782f0db2 DM |
1265 | |
1266 | XDELETEVEC (da_file_name); | |
1267 | da_file_name = NULL; | |
ca29da43 NS |
1268 | } |
1269 | ||
ca29da43 | 1270 | #include "gt-coverage.h" |