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ca29da43 NS |
1 | /* Read and write coverage files, and associated functionality. |
2 | Copyright (C) 1990, 1991, 1992, 1993, 1994, 1996, 1997, 1998, 1999, | |
3 | 2000, 2001, 2003 Free Software Foundation, Inc. | |
4 | Contributed by James E. Wilson, UC Berkeley/Cygnus Support; | |
5 | based on some ideas from Dain Samples of UC Berkeley. | |
6 | Further mangling by Bob Manson, Cygnus Support. | |
7 | Further mangled by Nathan Sidwell, CodeSourcery | |
8 | ||
9 | This file is part of GCC. | |
10 | ||
11 | GCC is free software; you can redistribute it and/or modify it under | |
12 | the terms of the GNU General Public License as published by the Free | |
13 | Software Foundation; either version 2, or (at your option) any later | |
14 | version. | |
15 | ||
16 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
17 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
18 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
19 | for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
22 | along with GCC; see the file COPYING. If not, write to the Free | |
23 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
24 | 02111-1307, USA. */ | |
25 | ||
26 | ||
27 | #define GCOV_LINKAGE | |
28 | ||
29 | #include "config.h" | |
30 | #include "system.h" | |
31 | #include "coretypes.h" | |
32 | #include "tm.h" | |
33 | #include "rtl.h" | |
34 | #include "tree.h" | |
35 | #include "flags.h" | |
36 | #include "output.h" | |
37 | #include "regs.h" | |
38 | #include "expr.h" | |
39 | #include "function.h" | |
40 | #include "toplev.h" | |
41 | #include "ggc.h" | |
42 | #include "target.h" | |
43 | #include "coverage.h" | |
44 | #include "libfuncs.h" | |
45 | #include "langhooks.h" | |
46 | #include "hashtab.h" | |
47 | ||
48 | #include "gcov-io.c" | |
49 | ||
50 | struct function_list | |
51 | { | |
159b3be1 AJ |
52 | struct function_list *next; /* next function */ |
53 | unsigned ident; /* function ident */ | |
cdb23767 NS |
54 | unsigned checksum; /* function checksum */ |
55 | unsigned n_ctrs[GCOV_COUNTERS];/* number of counters. */ | |
ca29da43 NS |
56 | }; |
57 | ||
58 | /* Counts information for a function. */ | |
59 | typedef struct counts_entry | |
60 | { | |
61 | /* We hash by */ | |
796621e8 | 62 | unsigned ident; |
cdb23767 | 63 | unsigned ctr; |
159b3be1 | 64 | |
ca29da43 NS |
65 | /* Store */ |
66 | unsigned checksum; | |
ca29da43 | 67 | gcov_type *counts; |
cdb23767 | 68 | struct gcov_ctr_summary summary; |
ca29da43 NS |
69 | |
70 | /* Workspace */ | |
71 | struct counts_entry *chain; | |
159b3be1 | 72 | |
ca29da43 NS |
73 | } counts_entry_t; |
74 | ||
75 | static struct function_list *functions_head = 0; | |
76 | static struct function_list **functions_tail = &functions_head; | |
6d70e6be | 77 | static unsigned no_coverage = 0; |
ca29da43 | 78 | |
cdb23767 NS |
79 | /* Cumulative counter information for whole program. */ |
80 | static unsigned prg_ctr_mask; /* Mask of counter types generated. */ | |
6d70e6be | 81 | static unsigned prg_n_ctrs[GCOV_COUNTERS]; /* Total counters allocated. */ |
ca29da43 | 82 | |
cdb23767 | 83 | /* Counter information for current function. */ |
71c0e7fc | 84 | static unsigned fn_ctr_mask; /* Mask of counters used. */ |
6d70e6be NS |
85 | static unsigned fn_n_ctrs[GCOV_COUNTERS]; /* Counters allocated. */ |
86 | static unsigned fn_b_ctrs[GCOV_COUNTERS]; /* Allocation base. */ | |
ca29da43 NS |
87 | |
88 | /* Name of the output file for coverage output file. */ | |
89 | static char *bbg_file_name; | |
90 | static unsigned bbg_file_opened; | |
91 | static int bbg_function_announced; | |
92 | ||
93 | /* Name of the count data file. */ | |
94 | static char *da_file_name; | |
95 | ||
96 | /* Hash table of count data. */ | |
97 | static htab_t counts_hash = NULL; | |
98 | ||
cdb23767 NS |
99 | /* The names of the counter tables. */ |
100 | static GTY(()) rtx ctr_labels[GCOV_COUNTERS]; | |
ca29da43 | 101 | |
09780dfb | 102 | /* The names of merge functions for counters. */ |
9b514d25 NS |
103 | static const char *const ctr_merge_functions[GCOV_COUNTERS] = GCOV_MERGE_FUNCTIONS; |
104 | static const char *const ctr_names[GCOV_COUNTERS] = GCOV_COUNTER_NAMES; | |
09780dfb | 105 | |
ca29da43 | 106 | /* Forward declarations. */ |
159b3be1 AJ |
107 | static hashval_t htab_counts_entry_hash (const void *); |
108 | static int htab_counts_entry_eq (const void *, const void *); | |
109 | static void htab_counts_entry_del (void *); | |
110 | static void read_counts_file (void); | |
111 | static unsigned compute_checksum (void); | |
112 | static unsigned checksum_string (unsigned, const char *); | |
113 | static tree build_fn_info_type (unsigned); | |
114 | static tree build_fn_info_value (const struct function_list *, tree); | |
115 | static tree build_ctr_info_type (void); | |
116 | static tree build_ctr_info_value (unsigned, tree); | |
117 | static tree build_gcov_info (void); | |
118 | static void create_coverage (void); | |
ca29da43 NS |
119 | |
120 | \f | |
121 | static hashval_t | |
159b3be1 | 122 | htab_counts_entry_hash (const void *of) |
ca29da43 NS |
123 | { |
124 | const counts_entry_t *entry = of; | |
125 | ||
796621e8 | 126 | return entry->ident * GCOV_COUNTERS + entry->ctr; |
ca29da43 NS |
127 | } |
128 | ||
129 | static int | |
159b3be1 | 130 | htab_counts_entry_eq (const void *of1, const void *of2) |
ca29da43 NS |
131 | { |
132 | const counts_entry_t *entry1 = of1; | |
133 | const counts_entry_t *entry2 = of2; | |
134 | ||
796621e8 | 135 | return entry1->ident == entry2->ident && entry1->ctr == entry2->ctr; |
ca29da43 NS |
136 | } |
137 | ||
138 | static void | |
159b3be1 | 139 | htab_counts_entry_del (void *of) |
ca29da43 NS |
140 | { |
141 | counts_entry_t *entry = of; | |
142 | ||
ca29da43 NS |
143 | free (entry->counts); |
144 | free (entry); | |
145 | } | |
146 | ||
147 | /* Read in the counts file, if available. */ | |
148 | ||
149 | static void | |
159b3be1 | 150 | read_counts_file (void) |
ca29da43 | 151 | { |
9b514d25 NS |
152 | gcov_unsigned_t fn_ident = 0; |
153 | gcov_unsigned_t version, checksum = -1; | |
154 | unsigned ix; | |
ca29da43 NS |
155 | counts_entry_t *summaried = NULL; |
156 | unsigned seen_summary = 0; | |
7d63a2fa NS |
157 | gcov_unsigned_t tag; |
158 | int error = 0; | |
159 | ||
ca29da43 NS |
160 | if (!gcov_open (da_file_name, 1)) |
161 | return; | |
159b3be1 | 162 | |
ca29da43 NS |
163 | if (gcov_read_unsigned () != GCOV_DATA_MAGIC) |
164 | { | |
165 | warning ("`%s' is not a gcov data file", da_file_name); | |
166 | gcov_close (); | |
167 | return; | |
168 | } | |
169 | else if ((version = gcov_read_unsigned ()) != GCOV_VERSION) | |
170 | { | |
171 | char v[4], e[4]; | |
9b514d25 | 172 | gcov_unsigned_t required = GCOV_VERSION; |
159b3be1 | 173 | |
ca29da43 NS |
174 | for (ix = 4; ix--; required >>= 8, version >>= 8) |
175 | { | |
176 | v[ix] = version; | |
177 | e[ix] = required; | |
178 | } | |
179 | warning ("`%s' is version `%.4s', expected version `%.4s'", | |
180 | da_file_name, v, e); | |
181 | gcov_close (); | |
182 | return; | |
183 | } | |
159b3be1 | 184 | |
ca29da43 NS |
185 | counts_hash = htab_create (10, |
186 | htab_counts_entry_hash, htab_counts_entry_eq, | |
187 | htab_counts_entry_del); | |
7d63a2fa | 188 | while ((tag = gcov_read_unsigned ())) |
ca29da43 | 189 | { |
7d63a2fa | 190 | gcov_unsigned_t length; |
9b514d25 | 191 | gcov_position_t offset; |
159b3be1 | 192 | |
ca29da43 NS |
193 | length = gcov_read_unsigned (); |
194 | offset = gcov_position (); | |
195 | if (tag == GCOV_TAG_FUNCTION) | |
196 | { | |
796621e8 | 197 | fn_ident = gcov_read_unsigned (); |
ca29da43 NS |
198 | checksum = gcov_read_unsigned (); |
199 | if (seen_summary) | |
200 | { | |
201 | /* We have already seen a summary, this means that this | |
202 | new function begins a new set of program runs. We | |
203 | must unlink the summaried chain. */ | |
204 | counts_entry_t *entry, *chain; | |
159b3be1 | 205 | |
ca29da43 NS |
206 | for (entry = summaried; entry; entry = chain) |
207 | { | |
208 | chain = entry->chain; | |
ca29da43 NS |
209 | entry->chain = NULL; |
210 | } | |
211 | summaried = NULL; | |
212 | seen_summary = 0; | |
213 | } | |
214 | } | |
215 | else if (tag == GCOV_TAG_PROGRAM_SUMMARY) | |
216 | { | |
217 | counts_entry_t *entry; | |
218 | struct gcov_summary summary; | |
159b3be1 | 219 | |
ca29da43 NS |
220 | gcov_read_summary (&summary); |
221 | seen_summary = 1; | |
222 | for (entry = summaried; entry; entry = entry->chain) | |
223 | { | |
cdb23767 | 224 | struct gcov_ctr_summary *csum = &summary.ctrs[entry->ctr]; |
159b3be1 | 225 | |
cdb23767 NS |
226 | entry->summary.runs += csum->runs; |
227 | entry->summary.sum_all += csum->sum_all; | |
228 | if (entry->summary.run_max < csum->run_max) | |
229 | entry->summary.run_max = csum->run_max; | |
230 | entry->summary.sum_max += csum->sum_max; | |
ca29da43 NS |
231 | } |
232 | } | |
796621e8 | 233 | else if (GCOV_TAG_IS_COUNTER (tag) && fn_ident) |
ca29da43 NS |
234 | { |
235 | counts_entry_t **slot, *entry, elt; | |
236 | unsigned n_counts = length / 8; | |
237 | unsigned ix; | |
238 | ||
796621e8 | 239 | elt.ident = fn_ident; |
cdb23767 | 240 | elt.ctr = GCOV_COUNTER_FOR_TAG (tag); |
ca29da43 NS |
241 | |
242 | slot = (counts_entry_t **) htab_find_slot | |
243 | (counts_hash, &elt, INSERT); | |
244 | entry = *slot; | |
245 | if (!entry) | |
246 | { | |
cdb23767 | 247 | *slot = entry = xcalloc (1, sizeof (counts_entry_t)); |
796621e8 | 248 | entry->ident = elt.ident; |
cdb23767 | 249 | entry->ctr = elt.ctr; |
ca29da43 | 250 | entry->checksum = checksum; |
cdb23767 | 251 | entry->summary.num = n_counts; |
ca29da43 NS |
252 | entry->counts = xcalloc (n_counts, sizeof (gcov_type)); |
253 | } | |
cdb23767 NS |
254 | else if (entry->checksum != checksum |
255 | || entry->summary.num != n_counts) | |
ca29da43 | 256 | { |
796621e8 | 257 | warning ("coverage mismatch for function %u", fn_ident); |
ca29da43 NS |
258 | htab_delete (counts_hash); |
259 | break; | |
260 | } | |
9b514d25 NS |
261 | else if (elt.ctr >= GCOV_COUNTERS_SUMMABLE) |
262 | { | |
263 | warning ("cannot merge separate %s counters for function %u", | |
264 | ctr_names[elt.ctr], fn_ident); | |
265 | goto skip_merge; | |
266 | } | |
267 | ||
268 | if (elt.ctr < GCOV_COUNTERS_SUMMABLE | |
269 | /* This should always be true for a just allocated entry, | |
159b3be1 AJ |
270 | and always false for an existing one. Check this way, in |
271 | case the gcov file is corrupt. */ | |
9b514d25 | 272 | && (!entry->chain || summaried != entry)) |
ca29da43 NS |
273 | { |
274 | entry->chain = summaried; | |
275 | summaried = entry; | |
276 | } | |
277 | for (ix = 0; ix != n_counts; ix++) | |
278 | entry->counts[ix] += gcov_read_counter (); | |
9b514d25 | 279 | skip_merge:; |
ca29da43 | 280 | } |
474f141e | 281 | gcov_sync (offset, length); |
ca29da43 | 282 | if ((error = gcov_is_error ())) |
7d63a2fa | 283 | break; |
ca29da43 NS |
284 | } |
285 | ||
7d63a2fa NS |
286 | if (!gcov_is_eof ()) |
287 | { | |
288 | warning (error < 0 ? "`%s' has overflowed" : "`%s' is corrupted", | |
289 | da_file_name); | |
290 | htab_delete (counts_hash); | |
291 | } | |
159b3be1 | 292 | |
ca29da43 NS |
293 | gcov_close (); |
294 | } | |
295 | ||
296 | /* Returns the counters for a particular tag. */ | |
297 | ||
298 | gcov_type * | |
cdb23767 NS |
299 | get_coverage_counts (unsigned counter, unsigned expected, |
300 | const struct gcov_ctr_summary **summary) | |
ca29da43 NS |
301 | { |
302 | counts_entry_t *entry, elt; | |
303 | ||
71c0e7fc | 304 | /* No hash table, no counts. */ |
ca29da43 NS |
305 | if (!counts_hash) |
306 | { | |
307 | static int warned = 0; | |
308 | ||
309 | if (!warned++) | |
310 | warning ("file %s not found, execution counts assumed to be zero", | |
311 | da_file_name); | |
312 | return NULL; | |
313 | } | |
314 | ||
6d70e6be | 315 | elt.ident = current_function_funcdef_no + 1; |
cdb23767 | 316 | elt.ctr = counter; |
ca29da43 NS |
317 | entry = htab_find (counts_hash, &elt); |
318 | if (!entry) | |
319 | { | |
796621e8 NS |
320 | warning ("no coverage for function '%s' found.", IDENTIFIER_POINTER |
321 | (DECL_ASSEMBLER_NAME (current_function_decl))); | |
ca29da43 NS |
322 | return 0; |
323 | } | |
159b3be1 | 324 | |
cdb23767 | 325 | if (expected != entry->summary.num |
ca29da43 NS |
326 | || compute_checksum () != entry->checksum) |
327 | { | |
796621e8 NS |
328 | warning ("coverage mismatch for `%s'", IDENTIFIER_POINTER |
329 | (DECL_ASSEMBLER_NAME (current_function_decl))); | |
ca29da43 NS |
330 | return NULL; |
331 | } | |
159b3be1 | 332 | |
cdb23767 NS |
333 | if (summary) |
334 | *summary = &entry->summary; | |
ca29da43 NS |
335 | |
336 | return entry->counts; | |
337 | } | |
cdb23767 | 338 | |
6356f892 | 339 | /* Allocate NUM counters of type COUNTER. Returns nonzero if the |
6d70e6be | 340 | allocation succeeded. */ |
cdb23767 | 341 | |
6d70e6be NS |
342 | int |
343 | coverage_counter_alloc (unsigned counter, unsigned num) | |
cdb23767 | 344 | { |
6d70e6be NS |
345 | if (no_coverage) |
346 | return 0; | |
159b3be1 | 347 | |
6d70e6be NS |
348 | if (!num) |
349 | return 1; | |
159b3be1 | 350 | |
cdb23767 NS |
351 | if (!ctr_labels[counter]) |
352 | { | |
353 | /* Generate and save a copy of this so it can be shared. */ | |
354 | char buf[20]; | |
159b3be1 | 355 | |
cdb23767 NS |
356 | ASM_GENERATE_INTERNAL_LABEL (buf, "LPBX", counter + 1); |
357 | ctr_labels[counter] = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (buf)); | |
358 | } | |
6d70e6be NS |
359 | fn_b_ctrs[counter] = fn_n_ctrs[counter]; |
360 | fn_n_ctrs[counter] += num; | |
361 | fn_ctr_mask |= 1 << counter; | |
362 | return 1; | |
363 | } | |
cdb23767 | 364 | |
6d70e6be NS |
365 | /* Generate a MEM rtl to access COUNTER NO. */ |
366 | ||
367 | rtx | |
368 | coverage_counter_ref (unsigned counter, unsigned no) | |
369 | { | |
370 | unsigned gcov_size = tree_low_cst (TYPE_SIZE (GCOV_TYPE_NODE), 1); | |
371 | enum machine_mode mode = mode_for_size (gcov_size, MODE_INT, 0); | |
372 | rtx ref; | |
373 | ||
374 | if (no >= fn_n_ctrs[counter] - fn_b_ctrs[counter]) | |
375 | abort (); | |
376 | no += prg_n_ctrs[counter] + fn_b_ctrs[counter]; | |
9b514d25 | 377 | ref = plus_constant (ctr_labels[counter], gcov_size / BITS_PER_UNIT * no); |
cdb23767 NS |
378 | ref = gen_rtx_MEM (mode, ref); |
379 | set_mem_alias_set (ref, new_alias_set ()); | |
380 | ||
381 | return ref; | |
382 | } | |
ca29da43 NS |
383 | \f |
384 | /* Generate a checksum for a string. CHKSUM is the current | |
71c0e7fc | 385 | checksum. */ |
ca29da43 NS |
386 | |
387 | static unsigned | |
388 | checksum_string (unsigned chksum, const char *string) | |
389 | { | |
390 | do | |
391 | { | |
392 | unsigned value = *string << 24; | |
393 | unsigned ix; | |
394 | ||
395 | for (ix = 8; ix--; value <<= 1) | |
396 | { | |
397 | unsigned feedback; | |
159b3be1 | 398 | |
ca29da43 NS |
399 | feedback = (value ^ chksum) & 0x80000000 ? 0x04c11db7 : 0; |
400 | chksum <<= 1; | |
401 | chksum ^= feedback; | |
402 | } | |
403 | } | |
404 | while (*string++); | |
159b3be1 | 405 | |
ca29da43 NS |
406 | return chksum; |
407 | } | |
408 | ||
409 | /* Compute checksum for the current function. We generate a CRC32. */ | |
410 | ||
411 | static unsigned | |
159b3be1 | 412 | compute_checksum (void) |
ca29da43 NS |
413 | { |
414 | unsigned chksum = DECL_SOURCE_LINE (current_function_decl); | |
415 | ||
416 | chksum = checksum_string (chksum, DECL_SOURCE_FILE (current_function_decl)); | |
417 | chksum = checksum_string | |
418 | (chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl))); | |
419 | ||
420 | return chksum; | |
421 | } | |
422 | \f | |
423 | /* Begin output to the graph file for the current function. | |
424 | Opens the output file, if not already done. Writes the | |
6356f892 | 425 | function header, if not already done. Returns nonzero if data |
ca29da43 NS |
426 | should be output. */ |
427 | ||
428 | int | |
159b3be1 | 429 | coverage_begin_output (void) |
ca29da43 | 430 | { |
6d70e6be NS |
431 | if (no_coverage) |
432 | return 0; | |
159b3be1 | 433 | |
ca29da43 NS |
434 | if (!bbg_function_announced) |
435 | { | |
436 | const char *file = DECL_SOURCE_FILE (current_function_decl); | |
437 | unsigned line = DECL_SOURCE_LINE (current_function_decl); | |
438 | unsigned long offset; | |
159b3be1 | 439 | |
ca29da43 NS |
440 | if (!bbg_file_opened) |
441 | { | |
442 | if (!gcov_open (bbg_file_name, -1)) | |
443 | error ("cannot open %s", bbg_file_name); | |
444 | else | |
445 | { | |
446 | gcov_write_unsigned (GCOV_GRAPH_MAGIC); | |
447 | gcov_write_unsigned (GCOV_VERSION); | |
448 | } | |
449 | bbg_file_opened = 1; | |
450 | } | |
159b3be1 | 451 | |
ca29da43 NS |
452 | /* Announce function */ |
453 | offset = gcov_write_tag (GCOV_TAG_FUNCTION); | |
6d70e6be | 454 | gcov_write_unsigned (current_function_funcdef_no + 1); |
796621e8 | 455 | gcov_write_unsigned (compute_checksum ()); |
ca29da43 NS |
456 | gcov_write_string (IDENTIFIER_POINTER |
457 | (DECL_ASSEMBLER_NAME (current_function_decl))); | |
ca29da43 NS |
458 | gcov_write_string (file); |
459 | gcov_write_unsigned (line); | |
460 | gcov_write_length (offset); | |
461 | ||
462 | bbg_function_announced = 1; | |
463 | } | |
464 | return !gcov_is_error (); | |
465 | } | |
466 | ||
467 | /* Finish coverage data for the current function. Verify no output | |
468 | error has occurred. Save function coverage counts. */ | |
469 | ||
470 | void | |
159b3be1 | 471 | coverage_end_function (void) |
ca29da43 NS |
472 | { |
473 | unsigned i; | |
159b3be1 | 474 | |
ca29da43 | 475 | if (bbg_file_opened > 1 && gcov_is_error ()) |
159b3be1 | 476 | { |
ca29da43 NS |
477 | warning ("error writing `%s'", bbg_file_name); |
478 | bbg_file_opened = -1; | |
479 | } | |
cdb23767 NS |
480 | |
481 | if (fn_ctr_mask) | |
482 | { | |
483 | struct function_list *item; | |
159b3be1 | 484 | |
cdb23767 | 485 | item = xmalloc (sizeof (struct function_list)); |
159b3be1 | 486 | |
cdb23767 NS |
487 | *functions_tail = item; |
488 | functions_tail = &item->next; | |
159b3be1 | 489 | |
cdb23767 | 490 | item->next = 0; |
6d70e6be | 491 | item->ident = current_function_funcdef_no + 1; |
cdb23767 NS |
492 | item->checksum = compute_checksum (); |
493 | for (i = 0; i != GCOV_COUNTERS; i++) | |
494 | { | |
495 | item->n_ctrs[i] = fn_n_ctrs[i]; | |
496 | prg_n_ctrs[i] += fn_n_ctrs[i]; | |
6d70e6be | 497 | fn_n_ctrs[i] = fn_b_ctrs[i] = 0; |
cdb23767 NS |
498 | } |
499 | prg_ctr_mask |= fn_ctr_mask; | |
500 | fn_ctr_mask = 0; | |
501 | } | |
ca29da43 NS |
502 | bbg_function_announced = 0; |
503 | } | |
504 | ||
cdb23767 | 505 | /* Creates the gcov_fn_info RECORD_TYPE. */ |
ca29da43 | 506 | |
ca29da43 | 507 | static tree |
159b3be1 | 508 | build_fn_info_type (unsigned int counters) |
ca29da43 | 509 | { |
cdb23767 | 510 | tree type = (*lang_hooks.types.make_type) (RECORD_TYPE); |
ca29da43 | 511 | tree field, fields; |
cdb23767 | 512 | tree array_type; |
159b3be1 | 513 | |
796621e8 | 514 | /* ident */ |
9b514d25 | 515 | fields = build_decl (FIELD_DECL, NULL_TREE, unsigned_intSI_type_node); |
ca29da43 | 516 | |
cdb23767 | 517 | /* checksum */ |
9b514d25 | 518 | field = build_decl (FIELD_DECL, NULL_TREE, unsigned_intSI_type_node); |
ca29da43 NS |
519 | TREE_CHAIN (field) = fields; |
520 | fields = field; | |
521 | ||
cdb23767 NS |
522 | array_type = build_index_type (build_int_2 (counters - 1, 0)); |
523 | array_type = build_array_type (unsigned_type_node, array_type); | |
159b3be1 | 524 | |
ca29da43 | 525 | /* counters */ |
cdb23767 | 526 | field = build_decl (FIELD_DECL, NULL_TREE, array_type); |
ca29da43 NS |
527 | TREE_CHAIN (field) = fields; |
528 | fields = field; | |
529 | ||
cdb23767 NS |
530 | finish_builtin_struct (type, "__gcov_fn_info", fields, NULL_TREE); |
531 | ||
532 | return type; | |
ca29da43 NS |
533 | } |
534 | ||
cdb23767 NS |
535 | /* Creates a CONSTRUCTOR for a gcov_fn_info. FUNCTION is |
536 | the function being processed and TYPE is the gcov_fn_info | |
537 | RECORD_TYPE. */ | |
538 | ||
ca29da43 | 539 | static tree |
159b3be1 | 540 | build_fn_info_value (const struct function_list *function, tree type) |
ca29da43 | 541 | { |
cdb23767 NS |
542 | tree value = NULL_TREE; |
543 | tree fields = TYPE_FIELDS (type); | |
cdb23767 NS |
544 | unsigned ix; |
545 | tree array_value = NULL_TREE; | |
159b3be1 | 546 | |
796621e8 | 547 | /* ident */ |
cdb23767 | 548 | value = tree_cons (fields, |
9b514d25 | 549 | convert (unsigned_intSI_type_node, |
796621e8 | 550 | build_int_2 (function->ident, 0)), |
ca29da43 | 551 | value); |
cdb23767 | 552 | fields = TREE_CHAIN (fields); |
159b3be1 | 553 | |
cdb23767 NS |
554 | /* checksum */ |
555 | value = tree_cons (fields, | |
9b514d25 | 556 | convert (unsigned_intSI_type_node, |
cdb23767 | 557 | build_int_2 (function->checksum, 0)), |
ca29da43 | 558 | value); |
cdb23767 | 559 | fields = TREE_CHAIN (fields); |
159b3be1 | 560 | |
ca29da43 | 561 | /* counters */ |
cdb23767 NS |
562 | for (ix = 0; ix != GCOV_COUNTERS; ix++) |
563 | if (prg_ctr_mask & (1 << ix)) | |
564 | { | |
565 | tree counters = convert (unsigned_type_node, | |
566 | build_int_2 (function->n_ctrs[ix], 0)); | |
159b3be1 | 567 | |
cdb23767 NS |
568 | array_value = tree_cons (NULL_TREE, counters, array_value); |
569 | } | |
159b3be1 | 570 | |
cdb23767 NS |
571 | array_value = build_constructor (TREE_TYPE (fields), nreverse (array_value)); |
572 | value = tree_cons (fields, array_value, value); | |
ca29da43 | 573 | |
cdb23767 | 574 | value = build_constructor (type, nreverse (value)); |
159b3be1 | 575 | |
ca29da43 NS |
576 | return value; |
577 | } | |
578 | ||
cdb23767 NS |
579 | /* Creates the gcov_ctr_info RECORD_TYPE. */ |
580 | ||
ca29da43 | 581 | static tree |
159b3be1 | 582 | build_ctr_info_type (void) |
ca29da43 | 583 | { |
cdb23767 NS |
584 | tree type = (*lang_hooks.types.make_type) (RECORD_TYPE); |
585 | tree field, fields = NULL_TREE; | |
9b514d25 | 586 | tree gcov_ptr_type = build_pointer_type (GCOV_TYPE_NODE); |
09780dfb | 587 | tree gcov_merge_fn_type; |
9b514d25 | 588 | |
cdb23767 | 589 | /* counters */ |
9b514d25 | 590 | field = build_decl (FIELD_DECL, NULL_TREE, unsigned_intSI_type_node); |
ca29da43 NS |
591 | TREE_CHAIN (field) = fields; |
592 | fields = field; | |
593 | ||
cdb23767 | 594 | /* values */ |
9b514d25 | 595 | field = build_decl (FIELD_DECL, NULL_TREE, gcov_ptr_type); |
ca29da43 NS |
596 | TREE_CHAIN (field) = fields; |
597 | fields = field; | |
598 | ||
09780dfb ZD |
599 | /* merge */ |
600 | gcov_merge_fn_type = | |
9b514d25 NS |
601 | build_function_type_list (void_type_node, |
602 | gcov_ptr_type, unsigned_type_node, | |
603 | NULL_TREE); | |
09780dfb ZD |
604 | field = build_decl (FIELD_DECL, NULL_TREE, |
605 | build_pointer_type (gcov_merge_fn_type)); | |
606 | TREE_CHAIN (field) = fields; | |
607 | fields = field; | |
608 | ||
cdb23767 | 609 | finish_builtin_struct (type, "__gcov_ctr_info", fields, NULL_TREE); |
ca29da43 | 610 | |
cdb23767 | 611 | return type; |
ca29da43 NS |
612 | } |
613 | ||
cdb23767 NS |
614 | /* Creates a CONSTRUCTOR for a gcov_ctr_info. COUNTER is |
615 | the counter being processed and TYPE is the gcov_ctr_info | |
616 | RECORD_TYPE. */ | |
617 | ||
ca29da43 | 618 | static tree |
159b3be1 | 619 | build_ctr_info_value (unsigned int counter, tree type) |
ca29da43 NS |
620 | { |
621 | tree value = NULL_TREE; | |
cdb23767 | 622 | tree fields = TYPE_FIELDS (type); |
09780dfb | 623 | tree fn; |
ca29da43 | 624 | |
cdb23767 NS |
625 | /* counters */ |
626 | value = tree_cons (fields, | |
9b514d25 | 627 | convert (unsigned_intSI_type_node, |
cdb23767 | 628 | build_int_2 (prg_n_ctrs[counter], 0)), |
ca29da43 | 629 | value); |
cdb23767 | 630 | fields = TREE_CHAIN (fields); |
ca29da43 | 631 | |
cdb23767 | 632 | if (prg_n_ctrs[counter]) |
ca29da43 | 633 | { |
cdb23767 | 634 | tree array_type, array; |
159b3be1 | 635 | |
cdb23767 NS |
636 | array_type = build_index_type (build_int_2 (prg_n_ctrs[counter] - 1, 0)); |
637 | array_type = build_array_type (TREE_TYPE (TREE_TYPE (fields)), | |
638 | array_type); | |
159b3be1 | 639 | |
cdb23767 NS |
640 | array = build (VAR_DECL, array_type, NULL_TREE, NULL_TREE); |
641 | TREE_STATIC (array) = 1; | |
642 | DECL_NAME (array) = get_identifier (XSTR (ctr_labels[counter], 0)); | |
643 | assemble_variable (array, 0, 0, 0); | |
159b3be1 | 644 | |
cdb23767 NS |
645 | value = tree_cons (fields, |
646 | build1 (ADDR_EXPR, TREE_TYPE (fields), array), | |
647 | value); | |
ca29da43 NS |
648 | } |
649 | else | |
cdb23767 | 650 | value = tree_cons (fields, null_pointer_node, value); |
09780dfb ZD |
651 | fields = TREE_CHAIN (fields); |
652 | ||
653 | fn = build_decl (FUNCTION_DECL, | |
654 | get_identifier (ctr_merge_functions[counter]), | |
655 | TREE_TYPE (TREE_TYPE (fields))); | |
656 | DECL_EXTERNAL (fn) = 1; | |
657 | TREE_PUBLIC (fn) = 1; | |
658 | DECL_ARTIFICIAL (fn) = 1; | |
659 | TREE_NOTHROW (fn) = 1; | |
660 | value = tree_cons (fields, | |
9b514d25 | 661 | build1 (ADDR_EXPR, TREE_TYPE (fields), fn), |
09780dfb | 662 | value); |
ca29da43 | 663 | |
cdb23767 | 664 | value = build_constructor (type, nreverse (value)); |
159b3be1 | 665 | |
ca29da43 NS |
666 | return value; |
667 | } | |
668 | ||
cdb23767 NS |
669 | /* Creates the gcov_info RECORD_TYPE and initializer for it. Returns a |
670 | CONSTRUCTOR. */ | |
671 | ||
ca29da43 | 672 | static tree |
159b3be1 | 673 | build_gcov_info (void) |
ca29da43 | 674 | { |
cdb23767 NS |
675 | unsigned n_ctr_types, ix; |
676 | tree type, const_type; | |
677 | tree fn_info_type, fn_info_value = NULL_TREE; | |
678 | tree fn_info_ptr_type; | |
679 | tree ctr_info_type, ctr_info_ary_type, ctr_info_value = NULL_TREE; | |
680 | tree field, fields = NULL_TREE; | |
681 | tree value = NULL_TREE; | |
682 | tree filename_string; | |
ca29da43 NS |
683 | char *filename; |
684 | int filename_len; | |
cdb23767 NS |
685 | unsigned n_fns; |
686 | const struct function_list *fn; | |
687 | tree string_type; | |
159b3be1 | 688 | |
cdb23767 NS |
689 | /* Count the number of active counters. */ |
690 | for (n_ctr_types = 0, ix = 0; ix != GCOV_COUNTERS; ix++) | |
691 | if (prg_ctr_mask & (1 << ix)) | |
692 | n_ctr_types++; | |
159b3be1 | 693 | |
cdb23767 NS |
694 | type = (*lang_hooks.types.make_type) (RECORD_TYPE); |
695 | const_type = build_qualified_type (type, TYPE_QUAL_CONST); | |
159b3be1 | 696 | |
cdb23767 | 697 | /* Version ident */ |
9b514d25 | 698 | field = build_decl (FIELD_DECL, NULL_TREE, unsigned_intSI_type_node); |
ca29da43 NS |
699 | TREE_CHAIN (field) = fields; |
700 | fields = field; | |
9b514d25 | 701 | value = tree_cons (field, convert (unsigned_intSI_type_node, |
cdb23767 | 702 | build_int_2 (GCOV_VERSION, 0)), |
ca29da43 | 703 | value); |
159b3be1 | 704 | |
ca29da43 | 705 | /* next -- NULL */ |
cdb23767 NS |
706 | field = build_decl (FIELD_DECL, NULL_TREE, build_pointer_type (const_type)); |
707 | TREE_CHAIN (field) = fields; | |
708 | fields = field; | |
709 | value = tree_cons (field, null_pointer_node, value); | |
159b3be1 | 710 | |
ca29da43 | 711 | /* Filename */ |
cdb23767 NS |
712 | string_type = build_pointer_type (build_qualified_type (char_type_node, |
713 | TYPE_QUAL_CONST)); | |
714 | field = build_decl (FIELD_DECL, NULL_TREE, string_type); | |
715 | TREE_CHAIN (field) = fields; | |
716 | fields = field; | |
ca29da43 NS |
717 | filename = getpwd (); |
718 | filename = (filename && da_file_name[0] != '/' | |
719 | ? concat (filename, "/", da_file_name, NULL) | |
720 | : da_file_name); | |
721 | filename_len = strlen (filename); | |
722 | filename_string = build_string (filename_len + 1, filename); | |
723 | if (filename != da_file_name) | |
724 | free (filename); | |
725 | TREE_TYPE (filename_string) = | |
726 | build_array_type (char_type_node, | |
727 | build_index_type (build_int_2 (filename_len, 0))); | |
cdb23767 | 728 | value = tree_cons (field, build1 (ADDR_EXPR, string_type, filename_string), |
ca29da43 | 729 | value); |
159b3be1 | 730 | |
cdb23767 NS |
731 | /* Build the fn_info type and initializer. */ |
732 | fn_info_type = build_fn_info_type (n_ctr_types); | |
733 | fn_info_ptr_type = build_pointer_type (build_qualified_type | |
734 | (fn_info_type, TYPE_QUAL_CONST)); | |
735 | for (fn = functions_head, n_fns = 0; fn; fn = fn->next, n_fns++) | |
736 | fn_info_value = tree_cons (NULL_TREE, | |
737 | build_fn_info_value (fn, fn_info_type), | |
738 | fn_info_value); | |
739 | if (n_fns) | |
ca29da43 NS |
740 | { |
741 | tree array_type; | |
742 | ||
cdb23767 NS |
743 | array_type = build_index_type (build_int_2 (n_fns - 1, 0)); |
744 | array_type = build_array_type (fn_info_type, array_type); | |
159b3be1 | 745 | |
cdb23767 NS |
746 | fn_info_value = build_constructor (array_type, nreverse (fn_info_value)); |
747 | fn_info_value = build1 (ADDR_EXPR, fn_info_ptr_type, fn_info_value); | |
ca29da43 NS |
748 | } |
749 | else | |
cdb23767 | 750 | fn_info_value = null_pointer_node; |
159b3be1 | 751 | |
cdb23767 NS |
752 | /* number of functions */ |
753 | field = build_decl (FIELD_DECL, NULL_TREE, unsigned_type_node); | |
754 | TREE_CHAIN (field) = fields; | |
755 | fields = field; | |
756 | value = tree_cons (field, | |
757 | convert (unsigned_type_node, build_int_2 (n_fns, 0)), | |
758 | value); | |
159b3be1 | 759 | |
cdb23767 NS |
760 | /* fn_info table */ |
761 | field = build_decl (FIELD_DECL, NULL_TREE, fn_info_ptr_type); | |
762 | TREE_CHAIN (field) = fields; | |
763 | fields = field; | |
764 | value = tree_cons (field, fn_info_value, value); | |
ca29da43 | 765 | |
cdb23767 NS |
766 | /* counter_mask */ |
767 | field = build_decl (FIELD_DECL, NULL_TREE, unsigned_type_node); | |
768 | TREE_CHAIN (field) = fields; | |
769 | fields = field; | |
770 | value = tree_cons (field, | |
ca29da43 | 771 | convert (unsigned_type_node, |
cdb23767 | 772 | build_int_2 (prg_ctr_mask, 0)), |
ca29da43 | 773 | value); |
159b3be1 | 774 | |
cdb23767 NS |
775 | /* counters */ |
776 | ctr_info_type = build_ctr_info_type (); | |
777 | ctr_info_ary_type = build_index_type (build_int_2 (n_ctr_types, 0)); | |
778 | ctr_info_ary_type = build_array_type (ctr_info_type, ctr_info_ary_type); | |
779 | for (ix = 0; ix != GCOV_COUNTERS; ix++) | |
780 | if (prg_ctr_mask & (1 << ix)) | |
781 | ctr_info_value = tree_cons (NULL_TREE, | |
782 | build_ctr_info_value (ix, ctr_info_type), | |
783 | ctr_info_value); | |
784 | ctr_info_value = build_constructor (ctr_info_ary_type, | |
785 | nreverse (ctr_info_value)); | |
786 | ||
787 | field = build_decl (FIELD_DECL, NULL_TREE, ctr_info_ary_type); | |
788 | TREE_CHAIN (field) = fields; | |
789 | fields = field; | |
790 | value = tree_cons (field, ctr_info_value, value); | |
159b3be1 | 791 | |
cdb23767 | 792 | finish_builtin_struct (type, "__gcov_info", fields, NULL_TREE); |
ca29da43 | 793 | |
cdb23767 | 794 | value = build_constructor (type, nreverse (value)); |
159b3be1 | 795 | |
ca29da43 NS |
796 | return value; |
797 | } | |
798 | ||
cdb23767 | 799 | /* Write out the structure which libgcov uses to locate all the |
ca29da43 NS |
800 | counters. The structures used here must match those defined in |
801 | gcov-io.h. Write out the constructor to call __gcov_init. */ | |
802 | ||
803 | static void | |
159b3be1 | 804 | create_coverage (void) |
ca29da43 | 805 | { |
cdb23767 | 806 | tree gcov_info, gcov_info_value; |
ca29da43 NS |
807 | char name[20]; |
808 | char *ctor_name; | |
809 | tree ctor; | |
810 | rtx gcov_info_address; | |
ca29da43 | 811 | |
6d70e6be | 812 | no_coverage = 1; /* Disable any further coverage. */ |
159b3be1 | 813 | |
cdb23767 | 814 | if (!prg_ctr_mask) |
ca29da43 | 815 | return; |
159b3be1 | 816 | |
cdb23767 | 817 | gcov_info_value = build_gcov_info (); |
ca29da43 | 818 | |
cdb23767 NS |
819 | gcov_info = build (VAR_DECL, TREE_TYPE (gcov_info_value), |
820 | NULL_TREE, NULL_TREE); | |
821 | DECL_INITIAL (gcov_info) = gcov_info_value; | |
ca29da43 NS |
822 | |
823 | TREE_STATIC (gcov_info) = 1; | |
824 | ASM_GENERATE_INTERNAL_LABEL (name, "LPBX", 0); | |
825 | DECL_NAME (gcov_info) = get_identifier (name); | |
159b3be1 | 826 | |
ca29da43 NS |
827 | /* Build structure. */ |
828 | assemble_variable (gcov_info, 0, 0, 0); | |
829 | ||
830 | /* Build the constructor function to invoke __gcov_init. */ | |
831 | ctor_name = concat (IDENTIFIER_POINTER (get_file_function_name ('I')), | |
832 | "_GCOV", NULL); | |
833 | ctor = build_decl (FUNCTION_DECL, get_identifier (ctor_name), | |
834 | build_function_type (void_type_node, NULL_TREE)); | |
835 | free (ctor_name); | |
836 | DECL_EXTERNAL (ctor) = 0; | |
837 | ||
838 | /* It can be a static function as long as collect2 does not have | |
839 | to scan the object file to find its ctor/dtor routine. */ | |
840 | TREE_PUBLIC (ctor) = ! targetm.have_ctors_dtors; | |
841 | TREE_USED (ctor) = 1; | |
842 | DECL_RESULT (ctor) = build_decl (RESULT_DECL, NULL_TREE, void_type_node); | |
6d70e6be | 843 | DECL_UNINLINABLE (ctor) = 1; |
ca29da43 NS |
844 | |
845 | ctor = (*lang_hooks.decls.pushdecl) (ctor); | |
846 | rest_of_decl_compilation (ctor, 0, 1, 0); | |
847 | announce_function (ctor); | |
848 | current_function_decl = ctor; | |
849 | DECL_INITIAL (ctor) = error_mark_node; | |
850 | make_decl_rtl (ctor, NULL); | |
ee6b0296 | 851 | init_function_start (ctor); |
ca29da43 NS |
852 | (*lang_hooks.decls.pushlevel) (0); |
853 | expand_function_start (ctor, 0); | |
ca29da43 NS |
854 | |
855 | /* Actually generate the code to call __gcov_init. */ | |
856 | gcov_info_address = force_reg (Pmode, XEXP (DECL_RTL (gcov_info), 0)); | |
857 | emit_library_call (gcov_init_libfunc, LCT_NORMAL, VOIDmode, 1, | |
858 | gcov_info_address, Pmode); | |
859 | ||
1f9cc6db | 860 | expand_function_end (); |
ca29da43 NS |
861 | (*lang_hooks.decls.poplevel) (1, 0, 1); |
862 | ||
ca29da43 NS |
863 | rest_of_compilation (ctor); |
864 | ||
ca29da43 NS |
865 | if (! quiet_flag) |
866 | fflush (asm_out_file); | |
867 | current_function_decl = NULL_TREE; | |
868 | ||
869 | if (targetm.have_ctors_dtors) | |
870 | (* targetm.asm_out.constructor) (XEXP (DECL_RTL (ctor), 0), | |
871 | DEFAULT_INIT_PRIORITY); | |
872 | } | |
ca29da43 NS |
873 | \f |
874 | /* Perform file-level initialization. Read in data file, generate name | |
71c0e7fc | 875 | of graph file. */ |
ca29da43 NS |
876 | |
877 | void | |
159b3be1 | 878 | coverage_init (const char *filename) |
ca29da43 NS |
879 | { |
880 | int len = strlen (filename); | |
881 | ||
796621e8 | 882 | /* Name of da file. */ |
ca29da43 NS |
883 | da_file_name = (char *) xmalloc (len + strlen (GCOV_DATA_SUFFIX) + 1); |
884 | strcpy (da_file_name, filename); | |
885 | strcat (da_file_name, GCOV_DATA_SUFFIX); | |
159b3be1 | 886 | |
796621e8 | 887 | /* Name of bbg file. */ |
ca29da43 NS |
888 | bbg_file_name = (char *) xmalloc (len + strlen (GCOV_GRAPH_SUFFIX) + 1); |
889 | strcpy (bbg_file_name, filename); | |
890 | strcat (bbg_file_name, GCOV_GRAPH_SUFFIX); | |
796621e8 NS |
891 | |
892 | read_counts_file (); | |
ca29da43 NS |
893 | } |
894 | ||
895 | /* Performs file-level cleanup. Close graph file, generate coverage | |
896 | variables and constructor. */ | |
897 | ||
898 | void | |
159b3be1 | 899 | coverage_finish (void) |
ca29da43 NS |
900 | { |
901 | create_coverage (); | |
902 | if (bbg_file_opened) | |
903 | { | |
904 | int error = gcov_close (); | |
159b3be1 | 905 | |
ca29da43 NS |
906 | if (error) |
907 | unlink (bbg_file_name); | |
908 | #if SELF_COVERAGE | |
909 | /* If the compiler is instrumented, we should not | |
910 | unconditionally remove the counts file, because we might be | |
911 | recompiling ourselves. The .da files are all removed during | |
912 | copying the stage1 files. */ | |
913 | if (error) | |
914 | #endif | |
915 | unlink (da_file_name); | |
916 | } | |
917 | } | |
918 | ||
ca29da43 | 919 | #include "gt-coverage.h" |