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ded3d3f8 | 1 | /* Routines required for instrumenting a program. */ |
2 | /* Compile this one with gcc. */ | |
8e8f6434 | 3 | /* Copyright (C) 1989-2018 Free Software Foundation, Inc. |
ded3d3f8 | 4 | |
5 | This file is part of GCC. | |
6 | ||
7 | GCC is free software; you can redistribute it and/or modify it under | |
8 | the terms of the GNU General Public License as published by the Free | |
9 | Software Foundation; either version 3, or (at your option) any later | |
10 | version. | |
11 | ||
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
16 | ||
17 | Under Section 7 of GPL version 3, you are granted additional | |
18 | permissions described in the GCC Runtime Library Exception, version | |
19 | 3.1, as published by the Free Software Foundation. | |
20 | ||
21 | You should have received a copy of the GNU General Public License and | |
22 | a copy of the GCC Runtime Library Exception along with this program; | |
23 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
24 | <http://www.gnu.org/licenses/>. */ | |
25 | ||
67745126 | 26 | #include "libgcov.h" |
ded3d3f8 | 27 | |
28 | #if defined(inhibit_libc) | |
29 | /* If libc and its header files are not available, provide dummy functions. */ | |
30 | ||
31 | #if defined(L_gcov) | |
32 | void __gcov_init (struct gcov_info *p __attribute__ ((unused))) {} | |
33 | #endif | |
34 | ||
35 | #else /* inhibit_libc */ | |
36 | ||
37 | #include <string.h> | |
38 | #if GCOV_LOCKED | |
39 | #include <fcntl.h> | |
40 | #include <errno.h> | |
41 | #include <sys/stat.h> | |
42 | #endif | |
43 | ||
44 | #ifdef L_gcov | |
f1919901 | 45 | |
3237fc56 | 46 | /* A utility function for outputting errors. */ |
f1919901 | 47 | static int gcov_error (const char *, ...); |
48 | ||
3237fc56 | 49 | #if !IN_GCOV_TOOL |
50 | static void gcov_error_exit (void); | |
51 | #endif | |
52 | ||
ded3d3f8 | 53 | #include "gcov-io.c" |
54 | ||
ded3d3f8 | 55 | struct gcov_fn_buffer |
56 | { | |
57 | struct gcov_fn_buffer *next; | |
58 | unsigned fn_ix; | |
59 | struct gcov_fn_info info; | |
60 | /* note gcov_fn_info ends in a trailing array. */ | |
61 | }; | |
62 | ||
63 | struct gcov_summary_buffer | |
64 | { | |
65 | struct gcov_summary_buffer *next; | |
66 | struct gcov_summary summary; | |
67 | }; | |
68 | ||
6401b74d | 69 | /* A struct that bundles all the related information about the |
70 | gcda filename. */ | |
71 | ||
72 | struct gcov_filename | |
73 | { | |
74 | char *filename; /* filename buffer */ | |
6401b74d | 75 | int strip; /* leading chars to strip from filename */ |
5b24ad4b | 76 | char *prefix; /* prefix string */ |
6401b74d | 77 | }; |
78 | ||
ded3d3f8 | 79 | static struct gcov_fn_buffer * |
80 | free_fn_data (const struct gcov_info *gi_ptr, struct gcov_fn_buffer *buffer, | |
81 | unsigned limit) | |
82 | { | |
83 | struct gcov_fn_buffer *next; | |
84 | unsigned ix, n_ctr = 0; | |
85 | ||
86 | if (!buffer) | |
87 | return 0; | |
88 | next = buffer->next; | |
89 | ||
90 | for (ix = 0; ix != limit; ix++) | |
91 | if (gi_ptr->merge[ix]) | |
92 | free (buffer->info.ctrs[n_ctr++].values); | |
93 | free (buffer); | |
94 | return next; | |
95 | } | |
96 | ||
97 | static struct gcov_fn_buffer ** | |
98 | buffer_fn_data (const char *filename, const struct gcov_info *gi_ptr, | |
99 | struct gcov_fn_buffer **end_ptr, unsigned fn_ix) | |
100 | { | |
101 | unsigned n_ctrs = 0, ix = 0; | |
102 | struct gcov_fn_buffer *fn_buffer; | |
103 | unsigned len; | |
104 | ||
105 | for (ix = GCOV_COUNTERS; ix--;) | |
106 | if (gi_ptr->merge[ix]) | |
107 | n_ctrs++; | |
108 | ||
109 | len = sizeof (*fn_buffer) + sizeof (fn_buffer->info.ctrs[0]) * n_ctrs; | |
67745126 | 110 | fn_buffer = (struct gcov_fn_buffer *) xmalloc (len); |
ded3d3f8 | 111 | |
112 | if (!fn_buffer) | |
113 | goto fail; | |
114 | ||
115 | fn_buffer->next = 0; | |
116 | fn_buffer->fn_ix = fn_ix; | |
117 | fn_buffer->info.ident = gcov_read_unsigned (); | |
118 | fn_buffer->info.lineno_checksum = gcov_read_unsigned (); | |
119 | fn_buffer->info.cfg_checksum = gcov_read_unsigned (); | |
120 | ||
121 | for (n_ctrs = ix = 0; ix != GCOV_COUNTERS; ix++) | |
122 | { | |
123 | gcov_unsigned_t length; | |
124 | gcov_type *values; | |
125 | ||
126 | if (!gi_ptr->merge[ix]) | |
127 | continue; | |
128 | ||
129 | if (gcov_read_unsigned () != GCOV_TAG_FOR_COUNTER (ix)) | |
130 | { | |
131 | len = 0; | |
132 | goto fail; | |
133 | } | |
134 | ||
135 | length = GCOV_TAG_COUNTER_NUM (gcov_read_unsigned ()); | |
136 | len = length * sizeof (gcov_type); | |
67745126 | 137 | values = (gcov_type *) xmalloc (len); |
ded3d3f8 | 138 | if (!values) |
139 | goto fail; | |
140 | ||
141 | fn_buffer->info.ctrs[n_ctrs].num = length; | |
142 | fn_buffer->info.ctrs[n_ctrs].values = values; | |
143 | ||
144 | while (length--) | |
145 | *values++ = gcov_read_counter (); | |
146 | n_ctrs++; | |
147 | } | |
148 | ||
149 | *end_ptr = fn_buffer; | |
150 | return &fn_buffer->next; | |
151 | ||
152 | fail: | |
153 | gcov_error ("profiling:%s:Function %u %s %u \n", filename, fn_ix, | |
154 | len ? "cannot allocate" : "counter mismatch", len ? len : ix); | |
155 | ||
156 | return (struct gcov_fn_buffer **)free_fn_data (gi_ptr, fn_buffer, ix); | |
157 | } | |
158 | ||
159 | /* Add an unsigned value to the current crc */ | |
160 | ||
161 | static gcov_unsigned_t | |
162 | crc32_unsigned (gcov_unsigned_t crc32, gcov_unsigned_t value) | |
163 | { | |
164 | unsigned ix; | |
165 | ||
166 | for (ix = 32; ix--; value <<= 1) | |
167 | { | |
168 | unsigned feedback; | |
169 | ||
170 | feedback = (value ^ crc32) & 0x80000000 ? 0x04c11db7 : 0; | |
171 | crc32 <<= 1; | |
172 | crc32 ^= feedback; | |
173 | } | |
174 | ||
175 | return crc32; | |
176 | } | |
177 | ||
178 | /* Check if VERSION of the info block PTR matches libgcov one. | |
179 | Return 1 on success, or zero in case of versions mismatch. | |
180 | If FILENAME is not NULL, its value used for reporting purposes | |
181 | instead of value from the info block. */ | |
182 | ||
183 | static int | |
184 | gcov_version (struct gcov_info *ptr, gcov_unsigned_t version, | |
185 | const char *filename) | |
186 | { | |
187 | if (version != GCOV_VERSION) | |
188 | { | |
189 | char v[4], e[4]; | |
190 | ||
191 | GCOV_UNSIGNED2STRING (v, version); | |
192 | GCOV_UNSIGNED2STRING (e, GCOV_VERSION); | |
193 | ||
194 | gcov_error ("profiling:%s:Version mismatch - expected %.4s got %.4s\n", | |
195 | filename? filename : ptr->filename, e, v); | |
196 | return 0; | |
197 | } | |
198 | return 1; | |
199 | } | |
200 | ||
201 | /* Insert counter VALUE into HISTOGRAM. */ | |
202 | ||
203 | static void | |
204 | gcov_histogram_insert(gcov_bucket_type *histogram, gcov_type value) | |
205 | { | |
206 | unsigned i; | |
207 | ||
208 | i = gcov_histo_index(value); | |
209 | histogram[i].num_counters++; | |
210 | histogram[i].cum_value += value; | |
211 | if (value < histogram[i].min_value) | |
212 | histogram[i].min_value = value; | |
213 | } | |
214 | ||
215 | /* Computes a histogram of the arc counters to place in the summary SUM. */ | |
216 | ||
217 | static void | |
859fa1a9 | 218 | gcov_compute_histogram (struct gcov_info *list, struct gcov_summary *sum) |
ded3d3f8 | 219 | { |
220 | struct gcov_info *gi_ptr; | |
221 | const struct gcov_fn_info *gfi_ptr; | |
222 | const struct gcov_ctr_info *ci_ptr; | |
5860b185 | 223 | unsigned f_ix, ix; |
ded3d3f8 | 224 | int h_ix; |
225 | ||
ded3d3f8 | 226 | /* First check if there are any counts recorded for this counter. */ |
5860b185 | 227 | if (!sum->num) |
ded3d3f8 | 228 | return; |
229 | ||
230 | for (h_ix = 0; h_ix < GCOV_HISTOGRAM_SIZE; h_ix++) | |
231 | { | |
5860b185 | 232 | sum->histogram[h_ix].num_counters = 0; |
233 | sum->histogram[h_ix].min_value = sum->run_max; | |
234 | sum->histogram[h_ix].cum_value = 0; | |
ded3d3f8 | 235 | } |
236 | ||
237 | /* Walk through all the per-object structures and record each of | |
238 | the count values in histogram. */ | |
859fa1a9 | 239 | for (gi_ptr = list; gi_ptr; gi_ptr = gi_ptr->next) |
ded3d3f8 | 240 | { |
ded3d3f8 | 241 | for (f_ix = 0; f_ix != gi_ptr->n_functions; f_ix++) |
242 | { | |
243 | gfi_ptr = gi_ptr->functions[f_ix]; | |
244 | ||
245 | if (!gfi_ptr || gfi_ptr->key != gi_ptr) | |
246 | continue; | |
247 | ||
5860b185 | 248 | ci_ptr = &gfi_ptr->ctrs[0]; |
249 | for (ix = 0; ix < ci_ptr->num; ix++) | |
250 | gcov_histogram_insert (sum->histogram, ci_ptr->values[ix]); | |
ded3d3f8 | 251 | } |
252 | } | |
253 | } | |
254 | ||
ded3d3f8 | 255 | /* buffer for the fn_data from another program. */ |
256 | static struct gcov_fn_buffer *fn_buffer; | |
257 | /* buffer for summary from other programs to be written out. */ | |
258 | static struct gcov_summary_buffer *sum_buffer; | |
259 | ||
6401b74d | 260 | /* This function computes the program level summary and the histo-gram. |
5b24ad4b | 261 | It computes and returns CRC32 and stored summary in THIS_PRG. */ |
ded3d3f8 | 262 | |
26054e0b | 263 | #if !IN_GCOV_TOOL |
264 | static | |
265 | #endif | |
266 | gcov_unsigned_t | |
5b24ad4b | 267 | compute_summary (struct gcov_info *list, struct gcov_summary *this_prg) |
ded3d3f8 | 268 | { |
269 | struct gcov_info *gi_ptr; | |
270 | const struct gcov_fn_info *gfi_ptr; | |
ded3d3f8 | 271 | const struct gcov_ctr_info *ci_ptr; |
272 | int f_ix; | |
ded3d3f8 | 273 | gcov_unsigned_t c_num; |
f75db2a8 | 274 | gcov_unsigned_t crc32 = 0; |
ded3d3f8 | 275 | |
ded3d3f8 | 276 | /* Find the totals for this execution. */ |
b9f9bf68 | 277 | memset (this_prg, 0, sizeof (*this_prg)); |
1186f97a | 278 | for (gi_ptr = list; gi_ptr; gi_ptr = gi_ptr->next) |
ded3d3f8 | 279 | { |
280 | crc32 = crc32_unsigned (crc32, gi_ptr->stamp); | |
281 | crc32 = crc32_unsigned (crc32, gi_ptr->n_functions); | |
282 | ||
283 | for (f_ix = 0; (unsigned)f_ix != gi_ptr->n_functions; f_ix++) | |
284 | { | |
285 | gfi_ptr = gi_ptr->functions[f_ix]; | |
286 | ||
287 | if (gfi_ptr && gfi_ptr->key != gi_ptr) | |
288 | gfi_ptr = 0; | |
289 | ||
290 | crc32 = crc32_unsigned (crc32, gfi_ptr ? gfi_ptr->cfg_checksum : 0); | |
291 | crc32 = crc32_unsigned (crc32, | |
292 | gfi_ptr ? gfi_ptr->lineno_checksum : 0); | |
293 | if (!gfi_ptr) | |
294 | continue; | |
295 | ||
5860b185 | 296 | ci_ptr = gfi_ptr->ctrs; |
297 | this_prg->num += ci_ptr->num; | |
298 | crc32 = crc32_unsigned (crc32, ci_ptr->num); | |
299 | ||
300 | for (c_num = 0; c_num < ci_ptr->num; c_num++) | |
301 | { | |
302 | this_prg->sum_all += ci_ptr->values[c_num]; | |
303 | if (this_prg->run_max < ci_ptr->values[c_num]) | |
304 | this_prg->run_max = ci_ptr->values[c_num]; | |
305 | } | |
306 | ci_ptr++; | |
307 | } | |
ded3d3f8 | 308 | } |
859fa1a9 | 309 | gcov_compute_histogram (list, this_prg); |
f75db2a8 | 310 | return crc32; |
ded3d3f8 | 311 | } |
312 | ||
ded3d3f8 | 313 | /* Including system dependent components. */ |
314 | #include "libgcov-driver-system.c" | |
315 | ||
316 | /* This function merges counters in GI_PTR to an existing gcda file. | |
317 | Return 0 on success. | |
318 | Return -1 on error. In this case, caller will goto read_fatal. */ | |
319 | ||
320 | static int | |
1186f97a | 321 | merge_one_data (const char *filename, |
322 | struct gcov_info *gi_ptr, | |
323 | struct gcov_summary *prg_p, | |
324 | struct gcov_summary *this_prg, | |
325 | gcov_position_t *summary_pos_p, | |
326 | gcov_position_t *eof_pos_p, | |
327 | gcov_unsigned_t crc32) | |
ded3d3f8 | 328 | { |
329 | gcov_unsigned_t tag, length; | |
330 | unsigned t_ix; | |
331 | int f_ix; | |
332 | int error = 0; | |
333 | struct gcov_fn_buffer **fn_tail = &fn_buffer; | |
334 | struct gcov_summary_buffer **sum_tail = &sum_buffer; | |
335 | ||
336 | length = gcov_read_unsigned (); | |
6401b74d | 337 | if (!gcov_version (gi_ptr, length, filename)) |
ded3d3f8 | 338 | return -1; |
339 | ||
340 | length = gcov_read_unsigned (); | |
341 | if (length != gi_ptr->stamp) | |
5522d934 | 342 | { |
343 | /* Read from a different compilation. Overwrite the file. */ | |
344 | gcov_error ("profiling:%s:overwriting an existing profile data " | |
345 | "with a different timestamp\n", filename); | |
346 | return 0; | |
347 | } | |
ded3d3f8 | 348 | |
349 | /* Look for program summary. */ | |
350 | for (f_ix = 0;;) | |
351 | { | |
352 | struct gcov_summary tmp; | |
353 | ||
354 | *eof_pos_p = gcov_position (); | |
355 | tag = gcov_read_unsigned (); | |
356 | if (tag != GCOV_TAG_PROGRAM_SUMMARY) | |
357 | break; | |
358 | ||
359 | f_ix--; | |
360 | length = gcov_read_unsigned (); | |
361 | gcov_read_summary (&tmp); | |
362 | if ((error = gcov_is_error ())) | |
363 | goto read_error; | |
364 | if (*summary_pos_p) | |
365 | { | |
366 | /* Save all summaries after the one that will be | |
367 | merged into below. These will need to be rewritten | |
368 | as histogram merging may change the number of non-zero | |
369 | histogram entries that will be emitted, and thus the | |
370 | size of the merged summary. */ | |
371 | (*sum_tail) = (struct gcov_summary_buffer *) | |
67745126 | 372 | xmalloc (sizeof(struct gcov_summary_buffer)); |
ded3d3f8 | 373 | (*sum_tail)->summary = tmp; |
374 | (*sum_tail)->next = 0; | |
375 | sum_tail = &((*sum_tail)->next); | |
376 | goto next_summary; | |
377 | } | |
378 | if (tmp.checksum != crc32) | |
379 | goto next_summary; | |
380 | ||
5860b185 | 381 | if (tmp.num != this_prg->num) |
382 | goto next_summary; | |
ded3d3f8 | 383 | *prg_p = tmp; |
384 | *summary_pos_p = *eof_pos_p; | |
385 | ||
386 | next_summary:; | |
387 | } | |
388 | ||
389 | /* Merge execution counts for each function. */ | |
390 | for (f_ix = 0; (unsigned)f_ix != gi_ptr->n_functions; | |
391 | f_ix++, tag = gcov_read_unsigned ()) | |
392 | { | |
393 | const struct gcov_ctr_info *ci_ptr; | |
394 | const struct gcov_fn_info *gfi_ptr = gi_ptr->functions[f_ix]; | |
395 | ||
396 | if (tag != GCOV_TAG_FUNCTION) | |
397 | goto read_mismatch; | |
398 | ||
399 | length = gcov_read_unsigned (); | |
400 | if (!length) | |
401 | /* This function did not appear in the other program. | |
402 | We have nothing to merge. */ | |
403 | continue; | |
404 | ||
405 | if (length != GCOV_TAG_FUNCTION_LENGTH) | |
406 | goto read_mismatch; | |
407 | ||
408 | if (!gfi_ptr || gfi_ptr->key != gi_ptr) | |
409 | { | |
410 | /* This function appears in the other program. We | |
411 | need to buffer the information in order to write | |
412 | it back out -- we'll be inserting data before | |
413 | this point, so cannot simply keep the data in the | |
414 | file. */ | |
6401b74d | 415 | fn_tail = buffer_fn_data (filename, gi_ptr, fn_tail, f_ix); |
ded3d3f8 | 416 | if (!fn_tail) |
417 | goto read_mismatch; | |
418 | continue; | |
419 | } | |
420 | ||
421 | length = gcov_read_unsigned (); | |
422 | if (length != gfi_ptr->ident) | |
423 | goto read_mismatch; | |
424 | ||
425 | length = gcov_read_unsigned (); | |
426 | if (length != gfi_ptr->lineno_checksum) | |
427 | goto read_mismatch; | |
428 | ||
429 | length = gcov_read_unsigned (); | |
430 | if (length != gfi_ptr->cfg_checksum) | |
431 | goto read_mismatch; | |
432 | ||
433 | ci_ptr = gfi_ptr->ctrs; | |
434 | for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++) | |
435 | { | |
436 | gcov_merge_fn merge = gi_ptr->merge[t_ix]; | |
437 | ||
438 | if (!merge) | |
439 | continue; | |
440 | ||
441 | tag = gcov_read_unsigned (); | |
442 | length = gcov_read_unsigned (); | |
443 | if (tag != GCOV_TAG_FOR_COUNTER (t_ix) | |
444 | || length != GCOV_TAG_COUNTER_LENGTH (ci_ptr->num)) | |
445 | goto read_mismatch; | |
446 | (*merge) (ci_ptr->values, ci_ptr->num); | |
447 | ci_ptr++; | |
448 | } | |
449 | if ((error = gcov_is_error ())) | |
450 | goto read_error; | |
451 | } | |
452 | ||
453 | if (tag) | |
454 | { | |
455 | read_mismatch:; | |
456 | gcov_error ("profiling:%s:Merge mismatch for %s %u\n", | |
6401b74d | 457 | filename, f_ix >= 0 ? "function" : "summary", |
ded3d3f8 | 458 | f_ix < 0 ? -1 - f_ix : f_ix); |
459 | return -1; | |
460 | } | |
461 | return 0; | |
462 | ||
463 | read_error: | |
6401b74d | 464 | gcov_error ("profiling:%s:%s merging\n", filename, |
ded3d3f8 | 465 | error < 0 ? "Overflow": "Error"); |
466 | return -1; | |
467 | } | |
468 | ||
469 | /* Write counters in GI_PTR and the summary in PRG to a gcda file. In | |
470 | the case of appending to an existing file, SUMMARY_POS will be non-zero. | |
471 | We will write the file starting from SUMMAY_POS. */ | |
472 | ||
473 | static void | |
1186f97a | 474 | write_one_data (const struct gcov_info *gi_ptr, |
475 | const struct gcov_summary *prg_p, | |
476 | const gcov_position_t eof_pos, | |
477 | const gcov_position_t summary_pos) | |
ded3d3f8 | 478 | { |
479 | unsigned f_ix; | |
480 | struct gcov_summary_buffer *next_sum_buffer; | |
481 | ||
482 | /* Write out the data. */ | |
483 | if (!eof_pos) | |
484 | { | |
485 | gcov_write_tag_length (GCOV_DATA_MAGIC, GCOV_VERSION); | |
486 | gcov_write_unsigned (gi_ptr->stamp); | |
487 | } | |
488 | ||
489 | if (summary_pos) | |
490 | gcov_seek (summary_pos); | |
491 | ||
492 | /* Generate whole program statistics. */ | |
493 | gcov_write_summary (GCOV_TAG_PROGRAM_SUMMARY, prg_p); | |
494 | ||
495 | /* Rewrite all the summaries that were after the summary we merged | |
496 | into. This is necessary as the merged summary may have a different | |
497 | size due to the number of non-zero histogram entries changing after | |
498 | merging. */ | |
499 | ||
500 | while (sum_buffer) | |
501 | { | |
502 | gcov_write_summary (GCOV_TAG_PROGRAM_SUMMARY, &sum_buffer->summary); | |
503 | next_sum_buffer = sum_buffer->next; | |
504 | free (sum_buffer); | |
505 | sum_buffer = next_sum_buffer; | |
506 | } | |
507 | ||
508 | /* Write execution counts for each function. */ | |
509 | for (f_ix = 0; f_ix != gi_ptr->n_functions; f_ix++) | |
510 | { | |
511 | unsigned buffered = 0; | |
512 | const struct gcov_fn_info *gfi_ptr; | |
513 | const struct gcov_ctr_info *ci_ptr; | |
514 | gcov_unsigned_t length; | |
515 | unsigned t_ix; | |
516 | ||
517 | if (fn_buffer && fn_buffer->fn_ix == f_ix) | |
518 | { | |
519 | /* Buffered data from another program. */ | |
520 | buffered = 1; | |
521 | gfi_ptr = &fn_buffer->info; | |
522 | length = GCOV_TAG_FUNCTION_LENGTH; | |
523 | } | |
524 | else | |
525 | { | |
526 | gfi_ptr = gi_ptr->functions[f_ix]; | |
527 | if (gfi_ptr && gfi_ptr->key == gi_ptr) | |
528 | length = GCOV_TAG_FUNCTION_LENGTH; | |
529 | else | |
530 | length = 0; | |
531 | } | |
532 | ||
533 | gcov_write_tag_length (GCOV_TAG_FUNCTION, length); | |
534 | if (!length) | |
535 | continue; | |
536 | ||
537 | gcov_write_unsigned (gfi_ptr->ident); | |
538 | gcov_write_unsigned (gfi_ptr->lineno_checksum); | |
539 | gcov_write_unsigned (gfi_ptr->cfg_checksum); | |
540 | ||
541 | ci_ptr = gfi_ptr->ctrs; | |
542 | for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++) | |
543 | { | |
544 | gcov_unsigned_t n_counts; | |
545 | gcov_type *c_ptr; | |
546 | ||
547 | if (!gi_ptr->merge[t_ix]) | |
548 | continue; | |
549 | ||
550 | n_counts = ci_ptr->num; | |
551 | gcov_write_tag_length (GCOV_TAG_FOR_COUNTER (t_ix), | |
552 | GCOV_TAG_COUNTER_LENGTH (n_counts)); | |
553 | c_ptr = ci_ptr->values; | |
554 | while (n_counts--) | |
555 | gcov_write_counter (*c_ptr++); | |
556 | ci_ptr++; | |
557 | } | |
558 | if (buffered) | |
559 | fn_buffer = free_fn_data (gi_ptr, fn_buffer, GCOV_COUNTERS); | |
560 | } | |
561 | ||
562 | gcov_write_unsigned (0); | |
563 | } | |
564 | ||
565 | /* Helper function for merging summary. | |
566 | Return -1 on error. Return 0 on success. */ | |
567 | ||
568 | static int | |
5860b185 | 569 | merge_summary (const char *filename __attribute__ ((unused)), int run_counted, |
570 | struct gcov_summary *prg, | |
1186f97a | 571 | struct gcov_summary *this_prg, gcov_unsigned_t crc32, |
572 | struct gcov_summary *all_prg __attribute__ ((unused))) | |
ded3d3f8 | 573 | { |
f75db2a8 | 574 | #if !GCOV_LOCKED |
575 | /* summary for all instances of program. */ | |
6b9cd917 | 576 | struct gcov_summary *all; |
f75db2a8 | 577 | #endif |
ded3d3f8 | 578 | |
5860b185 | 579 | /* Merge the summary. */ |
580 | int first = !prg->runs; | |
581 | ||
582 | if (!run_counted) | |
583 | prg->runs++; | |
584 | if (first) | |
585 | prg->num = this_prg->num; | |
586 | prg->sum_all += this_prg->sum_all; | |
587 | if (prg->run_max < this_prg->run_max) | |
588 | prg->run_max = this_prg->run_max; | |
589 | prg->sum_max += this_prg->run_max; | |
590 | if (first) | |
591 | memcpy (prg->histogram, this_prg->histogram, | |
592 | sizeof (gcov_bucket_type) * GCOV_HISTOGRAM_SIZE); | |
593 | else | |
594 | gcov_histogram_merge (prg->histogram, this_prg->histogram); | |
ded3d3f8 | 595 | #if !GCOV_LOCKED |
6b9cd917 | 596 | all = all_prg; |
5860b185 | 597 | if (!all->runs && prg->runs) |
598 | { | |
599 | all->num = prg->num; | |
600 | all->runs = prg->runs; | |
601 | all->sum_all = prg->sum_all; | |
602 | all->run_max = prg->run_max; | |
603 | all->sum_max = prg->sum_max; | |
604 | } | |
605 | else if (!all_prg->checksum | |
606 | /* Don't compare the histograms, which may have slight | |
607 | variations depending on the order they were updated | |
608 | due to the truncating integer divides used in the | |
609 | merge. */ | |
610 | && (all->num != prg->num | |
611 | || all->runs != prg->runs | |
612 | || all->sum_all != prg->sum_all | |
613 | || all->run_max != prg->run_max | |
614 | || all->sum_max != prg->sum_max)) | |
615 | { | |
616 | gcov_error ("profiling:%s:Data file mismatch - some " | |
617 | "data files may have been concurrently " | |
618 | "updated without locking support\n", filename); | |
619 | all_prg->checksum = ~0u; | |
ded3d3f8 | 620 | } |
5860b185 | 621 | #endif |
622 | ||
ded3d3f8 | 623 | prg->checksum = crc32; |
624 | ||
625 | return 0; | |
626 | } | |
627 | ||
8ceaa1ef | 628 | |
629 | /* Sort N entries in VALUE_ARRAY in descending order. | |
630 | Each entry in VALUE_ARRAY has two values. The sorting | |
631 | is based on the second value. */ | |
632 | ||
633 | GCOV_LINKAGE void | |
634 | gcov_sort_n_vals (gcov_type *value_array, int n) | |
635 | { | |
636 | int j, k; | |
637 | ||
638 | for (j = 2; j < n; j += 2) | |
639 | { | |
640 | gcov_type cur_ent[2]; | |
641 | ||
642 | cur_ent[0] = value_array[j]; | |
643 | cur_ent[1] = value_array[j + 1]; | |
644 | k = j - 2; | |
645 | while (k >= 0 && value_array[k + 1] < cur_ent[1]) | |
646 | { | |
647 | value_array[k + 2] = value_array[k]; | |
648 | value_array[k + 3] = value_array[k+1]; | |
649 | k -= 2; | |
650 | } | |
651 | value_array[k + 2] = cur_ent[0]; | |
652 | value_array[k + 3] = cur_ent[1]; | |
653 | } | |
654 | } | |
655 | ||
656 | /* Sort the profile counters for all indirect call sites. Counters | |
657 | for each call site are allocated in array COUNTERS. */ | |
658 | ||
659 | static void | |
660 | gcov_sort_icall_topn_counter (const struct gcov_ctr_info *counters) | |
661 | { | |
662 | int i; | |
663 | gcov_type *values; | |
664 | int n = counters->num; | |
665 | ||
666 | gcc_assert (!(n % GCOV_ICALL_TOPN_NCOUNTS)); | |
667 | values = counters->values; | |
668 | ||
669 | for (i = 0; i < n; i += GCOV_ICALL_TOPN_NCOUNTS) | |
670 | { | |
671 | gcov_type *value_array = &values[i + 1]; | |
672 | gcov_sort_n_vals (value_array, GCOV_ICALL_TOPN_NCOUNTS - 1); | |
673 | } | |
674 | } | |
675 | ||
676 | /* Sort topn indirect_call profile counters in GI_PTR. */ | |
677 | ||
678 | static void | |
679 | gcov_sort_topn_counter_arrays (const struct gcov_info *gi_ptr) | |
680 | { | |
681 | unsigned int i; | |
682 | int f_ix; | |
683 | const struct gcov_fn_info *gfi_ptr; | |
684 | const struct gcov_ctr_info *ci_ptr; | |
685 | ||
686 | if (!gi_ptr->merge[GCOV_COUNTER_ICALL_TOPNV]) | |
687 | return; | |
688 | ||
689 | for (f_ix = 0; (unsigned)f_ix != gi_ptr->n_functions; f_ix++) | |
690 | { | |
691 | gfi_ptr = gi_ptr->functions[f_ix]; | |
692 | ci_ptr = gfi_ptr->ctrs; | |
693 | for (i = 0; i < GCOV_COUNTERS; i++) | |
694 | { | |
695 | if (!gi_ptr->merge[i]) | |
696 | continue; | |
697 | if (i == GCOV_COUNTER_ICALL_TOPNV) | |
698 | { | |
699 | gcov_sort_icall_topn_counter (ci_ptr); | |
700 | break; | |
701 | } | |
702 | ci_ptr++; | |
703 | } | |
704 | } | |
705 | } | |
706 | ||
ded3d3f8 | 707 | /* Dump the coverage counts for one gcov_info object. We merge with existing |
708 | counts when possible, to avoid growing the .da files ad infinitum. We use | |
709 | this program's checksum to make sure we only accumulate whole program | |
710 | statistics to the correct summary. An object file might be embedded | |
711 | in two separate programs, and we must keep the two program | |
712 | summaries separate. */ | |
713 | ||
714 | static void | |
1186f97a | 715 | dump_one_gcov (struct gcov_info *gi_ptr, struct gcov_filename *gf, |
716 | unsigned run_counted, | |
717 | gcov_unsigned_t crc32, struct gcov_summary *all_prg, | |
718 | struct gcov_summary *this_prg) | |
ded3d3f8 | 719 | { |
720 | struct gcov_summary prg; /* summary for this object over all program. */ | |
721 | int error; | |
722 | gcov_unsigned_t tag; | |
723 | gcov_position_t summary_pos = 0; | |
724 | gcov_position_t eof_pos = 0; | |
725 | ||
726 | fn_buffer = 0; | |
727 | sum_buffer = 0; | |
728 | ||
8ceaa1ef | 729 | gcov_sort_topn_counter_arrays (gi_ptr); |
730 | ||
ded3d3f8 | 731 | error = gcov_exit_open_gcda_file (gi_ptr, gf); |
732 | if (error == -1) | |
733 | return; | |
734 | ||
735 | tag = gcov_read_unsigned (); | |
736 | if (tag) | |
737 | { | |
738 | /* Merge data from file. */ | |
739 | if (tag != GCOV_DATA_MAGIC) | |
740 | { | |
6401b74d | 741 | gcov_error ("profiling:%s:Not a gcov data file\n", gf->filename); |
ded3d3f8 | 742 | goto read_fatal; |
743 | } | |
1186f97a | 744 | error = merge_one_data (gf->filename, gi_ptr, &prg, this_prg, |
745 | &summary_pos, &eof_pos, crc32); | |
ded3d3f8 | 746 | if (error == -1) |
747 | goto read_fatal; | |
748 | } | |
749 | ||
750 | gcov_rewrite (); | |
751 | ||
752 | if (!summary_pos) | |
753 | { | |
754 | memset (&prg, 0, sizeof (prg)); | |
755 | summary_pos = eof_pos; | |
756 | } | |
757 | ||
5860b185 | 758 | error = merge_summary (gf->filename, run_counted, &prg, this_prg, |
1186f97a | 759 | crc32, all_prg); |
ded3d3f8 | 760 | if (error == -1) |
761 | goto read_fatal; | |
762 | ||
1186f97a | 763 | write_one_data (gi_ptr, &prg, eof_pos, summary_pos); |
ded3d3f8 | 764 | /* fall through */ |
765 | ||
766 | read_fatal:; | |
767 | while (fn_buffer) | |
768 | fn_buffer = free_fn_data (gi_ptr, fn_buffer, GCOV_COUNTERS); | |
769 | ||
770 | if ((error = gcov_close ())) | |
771 | gcov_error (error < 0 ? | |
772 | "profiling:%s:Overflow writing\n" : | |
773 | "profiling:%s:Error writing\n", | |
6401b74d | 774 | gf->filename); |
ded3d3f8 | 775 | } |
776 | ||
777 | ||
778 | /* Dump all the coverage counts for the program. It first computes program | |
779 | summary and then traverses gcov_list list and dumps the gcov_info | |
780 | objects one by one. */ | |
781 | ||
859fa1a9 | 782 | #if !IN_GCOV_TOOL |
783 | static | |
784 | #endif | |
785 | void | |
1186f97a | 786 | gcov_do_dump (struct gcov_info *list, int run_counted) |
ded3d3f8 | 787 | { |
788 | struct gcov_info *gi_ptr; | |
6401b74d | 789 | struct gcov_filename gf; |
f75db2a8 | 790 | gcov_unsigned_t crc32; |
791 | struct gcov_summary all_prg; | |
b9f9bf68 | 792 | struct gcov_summary this_prg; |
ded3d3f8 | 793 | |
5b24ad4b | 794 | crc32 = compute_summary (list, &this_prg); |
ded3d3f8 | 795 | |
796 | allocate_filename_struct (&gf); | |
f75db2a8 | 797 | #if !GCOV_LOCKED |
798 | memset (&all_prg, 0, sizeof (all_prg)); | |
799 | #endif | |
ded3d3f8 | 800 | |
801 | /* Now merge each file. */ | |
1186f97a | 802 | for (gi_ptr = list; gi_ptr; gi_ptr = gi_ptr->next) |
5b24ad4b | 803 | { |
804 | dump_one_gcov (gi_ptr, &gf, run_counted, crc32, &all_prg, &this_prg); | |
805 | free (gf.filename); | |
806 | } | |
ded3d3f8 | 807 | |
5b24ad4b | 808 | free (gf.prefix); |
ded3d3f8 | 809 | } |
810 | ||
6db59335 | 811 | #if IN_GCOV_TOOL |
812 | const char * | |
813 | __attribute__ ((unused)) | |
814 | gcov_get_filename (struct gcov_info *list) | |
815 | { | |
816 | return list->filename; | |
817 | } | |
818 | #endif | |
819 | ||
cb3ea3de | 820 | #if !IN_GCOV_TOOL |
1186f97a | 821 | void |
859fa1a9 | 822 | __gcov_dump_one (struct gcov_root *root) |
1186f97a | 823 | { |
859fa1a9 | 824 | if (root->dumped) |
1186f97a | 825 | return; |
826 | ||
859fa1a9 | 827 | gcov_do_dump (root->list, root->run_counted); |
1186f97a | 828 | |
859fa1a9 | 829 | root->dumped = 1; |
830 | root->run_counted = 1; | |
1186f97a | 831 | } |
832 | ||
bc587267 | 833 | /* Per-dynamic-object gcov state. */ |
859fa1a9 | 834 | struct gcov_root __gcov_root; |
ded3d3f8 | 835 | |
bc587267 | 836 | /* Exactly one of these will be live in the process image. */ |
837 | struct gcov_master __gcov_master = | |
838 | {GCOV_VERSION, 0}; | |
839 | ||
db46bcd3 | 840 | void |
841 | __gcov_exit (void) | |
ded3d3f8 | 842 | { |
859fa1a9 | 843 | __gcov_dump_one (&__gcov_root); |
bc587267 | 844 | if (__gcov_root.next) |
845 | __gcov_root.next->prev = __gcov_root.prev; | |
846 | if (__gcov_root.prev) | |
847 | __gcov_root.prev->next = __gcov_root.next; | |
848 | else | |
849 | __gcov_master.root = __gcov_root.next; | |
3237fc56 | 850 | |
851 | gcov_error_exit (); | |
ded3d3f8 | 852 | } |
853 | ||
854 | /* Add a new object file onto the bb chain. Invoked automatically | |
855 | when running an object file's global ctors. */ | |
856 | ||
857 | void | |
858 | __gcov_init (struct gcov_info *info) | |
859 | { | |
860 | if (!info->version || !info->n_functions) | |
861 | return; | |
862 | if (gcov_version (info, info->version, 0)) | |
863 | { | |
859fa1a9 | 864 | if (!__gcov_root.list) |
bc587267 | 865 | { |
866 | /* Add to master list and at exit function. */ | |
867 | if (gcov_version (NULL, __gcov_master.version, "<master>")) | |
868 | { | |
869 | __gcov_root.next = __gcov_master.root; | |
870 | if (__gcov_master.root) | |
871 | __gcov_master.root->prev = &__gcov_root; | |
872 | __gcov_master.root = &__gcov_root; | |
873 | } | |
bc587267 | 874 | } |
ded3d3f8 | 875 | |
859fa1a9 | 876 | info->next = __gcov_root.list; |
877 | __gcov_root.list = info; | |
ded3d3f8 | 878 | } |
ded3d3f8 | 879 | } |
cb3ea3de | 880 | #endif /* !IN_GCOV_TOOL */ |
ded3d3f8 | 881 | #endif /* L_gcov */ |
882 | #endif /* inhibit_libc */ |