]>
Commit | Line | Data |
---|---|---|
d6d3f033 RX |
1 | /* Routines required for instrumenting a program. */ |
2 | /* Compile this one with gcc. */ | |
ac1dca3c | 3 | /* Copyright (C) 1989-2014 Free Software Foundation, Inc. |
d6d3f033 RX |
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 | ||
40d6b753 | 26 | #include "libgcov.h" |
d6d3f033 RX |
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 | |
e3f0315f TJ |
45 | |
46 | /* A utility function for outputing errors. */ | |
47 | static int gcov_error (const char *, ...); | |
48 | ||
d6d3f033 RX |
49 | #include "gcov-io.c" |
50 | ||
51 | /* The following functions can be called from outside of this file. */ | |
52 | extern void gcov_clear (void) ATTRIBUTE_HIDDEN; | |
53 | extern void gcov_exit (void) ATTRIBUTE_HIDDEN; | |
d6d3f033 RX |
54 | |
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 | ||
6dc33097 NS |
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 */ | |
75 | size_t max_length; /* maximum filename length */ | |
76 | int strip; /* leading chars to strip from filename */ | |
77 | size_t prefix; /* chars to prepend to filename */ | |
78 | }; | |
79 | ||
d6d3f033 | 80 | /* Chain of per-object gcov structures. */ |
d10ee722 NS |
81 | #ifndef IN_GCOV_TOOL |
82 | /* We need to expose this static variable when compiling for gcov-tool. */ | |
83 | static | |
84 | #endif | |
85 | struct gcov_info *gcov_list; | |
d6d3f033 | 86 | |
d6d3f033 RX |
87 | /* Flag when the profile has already been dumped via __gcov_dump(). */ |
88 | static int gcov_dump_complete; | |
89 | ||
d6d3f033 RX |
90 | static struct gcov_fn_buffer * |
91 | free_fn_data (const struct gcov_info *gi_ptr, struct gcov_fn_buffer *buffer, | |
92 | unsigned limit) | |
93 | { | |
94 | struct gcov_fn_buffer *next; | |
95 | unsigned ix, n_ctr = 0; | |
96 | ||
97 | if (!buffer) | |
98 | return 0; | |
99 | next = buffer->next; | |
100 | ||
101 | for (ix = 0; ix != limit; ix++) | |
102 | if (gi_ptr->merge[ix]) | |
103 | free (buffer->info.ctrs[n_ctr++].values); | |
104 | free (buffer); | |
105 | return next; | |
106 | } | |
107 | ||
108 | static struct gcov_fn_buffer ** | |
109 | buffer_fn_data (const char *filename, const struct gcov_info *gi_ptr, | |
110 | struct gcov_fn_buffer **end_ptr, unsigned fn_ix) | |
111 | { | |
112 | unsigned n_ctrs = 0, ix = 0; | |
113 | struct gcov_fn_buffer *fn_buffer; | |
114 | unsigned len; | |
115 | ||
116 | for (ix = GCOV_COUNTERS; ix--;) | |
117 | if (gi_ptr->merge[ix]) | |
118 | n_ctrs++; | |
119 | ||
120 | len = sizeof (*fn_buffer) + sizeof (fn_buffer->info.ctrs[0]) * n_ctrs; | |
40d6b753 | 121 | fn_buffer = (struct gcov_fn_buffer *) xmalloc (len); |
d6d3f033 RX |
122 | |
123 | if (!fn_buffer) | |
124 | goto fail; | |
125 | ||
126 | fn_buffer->next = 0; | |
127 | fn_buffer->fn_ix = fn_ix; | |
128 | fn_buffer->info.ident = gcov_read_unsigned (); | |
129 | fn_buffer->info.lineno_checksum = gcov_read_unsigned (); | |
130 | fn_buffer->info.cfg_checksum = gcov_read_unsigned (); | |
131 | ||
132 | for (n_ctrs = ix = 0; ix != GCOV_COUNTERS; ix++) | |
133 | { | |
134 | gcov_unsigned_t length; | |
135 | gcov_type *values; | |
136 | ||
137 | if (!gi_ptr->merge[ix]) | |
138 | continue; | |
139 | ||
140 | if (gcov_read_unsigned () != GCOV_TAG_FOR_COUNTER (ix)) | |
141 | { | |
142 | len = 0; | |
143 | goto fail; | |
144 | } | |
145 | ||
146 | length = GCOV_TAG_COUNTER_NUM (gcov_read_unsigned ()); | |
147 | len = length * sizeof (gcov_type); | |
40d6b753 | 148 | values = (gcov_type *) xmalloc (len); |
d6d3f033 RX |
149 | if (!values) |
150 | goto fail; | |
151 | ||
152 | fn_buffer->info.ctrs[n_ctrs].num = length; | |
153 | fn_buffer->info.ctrs[n_ctrs].values = values; | |
154 | ||
155 | while (length--) | |
156 | *values++ = gcov_read_counter (); | |
157 | n_ctrs++; | |
158 | } | |
159 | ||
160 | *end_ptr = fn_buffer; | |
161 | return &fn_buffer->next; | |
162 | ||
163 | fail: | |
164 | gcov_error ("profiling:%s:Function %u %s %u \n", filename, fn_ix, | |
165 | len ? "cannot allocate" : "counter mismatch", len ? len : ix); | |
166 | ||
167 | return (struct gcov_fn_buffer **)free_fn_data (gi_ptr, fn_buffer, ix); | |
168 | } | |
169 | ||
170 | /* Add an unsigned value to the current crc */ | |
171 | ||
172 | static gcov_unsigned_t | |
173 | crc32_unsigned (gcov_unsigned_t crc32, gcov_unsigned_t value) | |
174 | { | |
175 | unsigned ix; | |
176 | ||
177 | for (ix = 32; ix--; value <<= 1) | |
178 | { | |
179 | unsigned feedback; | |
180 | ||
181 | feedback = (value ^ crc32) & 0x80000000 ? 0x04c11db7 : 0; | |
182 | crc32 <<= 1; | |
183 | crc32 ^= feedback; | |
184 | } | |
185 | ||
186 | return crc32; | |
187 | } | |
188 | ||
189 | /* Check if VERSION of the info block PTR matches libgcov one. | |
190 | Return 1 on success, or zero in case of versions mismatch. | |
191 | If FILENAME is not NULL, its value used for reporting purposes | |
192 | instead of value from the info block. */ | |
193 | ||
194 | static int | |
195 | gcov_version (struct gcov_info *ptr, gcov_unsigned_t version, | |
196 | const char *filename) | |
197 | { | |
198 | if (version != GCOV_VERSION) | |
199 | { | |
200 | char v[4], e[4]; | |
201 | ||
202 | GCOV_UNSIGNED2STRING (v, version); | |
203 | GCOV_UNSIGNED2STRING (e, GCOV_VERSION); | |
204 | ||
205 | gcov_error ("profiling:%s:Version mismatch - expected %.4s got %.4s\n", | |
206 | filename? filename : ptr->filename, e, v); | |
207 | return 0; | |
208 | } | |
209 | return 1; | |
210 | } | |
211 | ||
212 | /* Insert counter VALUE into HISTOGRAM. */ | |
213 | ||
214 | static void | |
215 | gcov_histogram_insert(gcov_bucket_type *histogram, gcov_type value) | |
216 | { | |
217 | unsigned i; | |
218 | ||
219 | i = gcov_histo_index(value); | |
220 | histogram[i].num_counters++; | |
221 | histogram[i].cum_value += value; | |
222 | if (value < histogram[i].min_value) | |
223 | histogram[i].min_value = value; | |
224 | } | |
225 | ||
226 | /* Computes a histogram of the arc counters to place in the summary SUM. */ | |
227 | ||
228 | static void | |
229 | gcov_compute_histogram (struct gcov_summary *sum) | |
230 | { | |
231 | struct gcov_info *gi_ptr; | |
232 | const struct gcov_fn_info *gfi_ptr; | |
233 | const struct gcov_ctr_info *ci_ptr; | |
234 | struct gcov_ctr_summary *cs_ptr; | |
235 | unsigned t_ix, f_ix, ctr_info_ix, ix; | |
236 | int h_ix; | |
237 | ||
238 | /* This currently only applies to arc counters. */ | |
239 | t_ix = GCOV_COUNTER_ARCS; | |
240 | ||
241 | /* First check if there are any counts recorded for this counter. */ | |
242 | cs_ptr = &(sum->ctrs[t_ix]); | |
243 | if (!cs_ptr->num) | |
244 | return; | |
245 | ||
246 | for (h_ix = 0; h_ix < GCOV_HISTOGRAM_SIZE; h_ix++) | |
247 | { | |
248 | cs_ptr->histogram[h_ix].num_counters = 0; | |
249 | cs_ptr->histogram[h_ix].min_value = cs_ptr->run_max; | |
250 | cs_ptr->histogram[h_ix].cum_value = 0; | |
251 | } | |
252 | ||
253 | /* Walk through all the per-object structures and record each of | |
254 | the count values in histogram. */ | |
255 | for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next) | |
256 | { | |
257 | if (!gi_ptr->merge[t_ix]) | |
258 | continue; | |
259 | ||
260 | /* Find the appropriate index into the gcov_ctr_info array | |
261 | for the counter we are currently working on based on the | |
262 | existence of the merge function pointer for this object. */ | |
263 | for (ix = 0, ctr_info_ix = 0; ix < t_ix; ix++) | |
264 | { | |
265 | if (gi_ptr->merge[ix]) | |
266 | ctr_info_ix++; | |
267 | } | |
268 | for (f_ix = 0; f_ix != gi_ptr->n_functions; f_ix++) | |
269 | { | |
270 | gfi_ptr = gi_ptr->functions[f_ix]; | |
271 | ||
272 | if (!gfi_ptr || gfi_ptr->key != gi_ptr) | |
273 | continue; | |
274 | ||
275 | ci_ptr = &gfi_ptr->ctrs[ctr_info_ix]; | |
276 | for (ix = 0; ix < ci_ptr->num; ix++) | |
277 | gcov_histogram_insert (cs_ptr->histogram, ci_ptr->values[ix]); | |
278 | } | |
279 | } | |
280 | } | |
281 | ||
d6d3f033 RX |
282 | /* buffer for the fn_data from another program. */ |
283 | static struct gcov_fn_buffer *fn_buffer; | |
284 | /* buffer for summary from other programs to be written out. */ | |
285 | static struct gcov_summary_buffer *sum_buffer; | |
7f369373 JH |
286 | /* If application calls fork or exec multiple times, we end up storing |
287 | profile repeadely. We should not account this as multiple runs or | |
288 | functions executed once may mistakely become cold. */ | |
289 | static int run_accounted = 0; | |
d6d3f033 | 290 | |
6dc33097 NS |
291 | /* This function computes the program level summary and the histo-gram. |
292 | It computes and returns CRC32 and stored summary in THIS_PRG. | |
293 | Also determines the longest filename length of the info files. */ | |
d6d3f033 | 294 | |
867c8b03 | 295 | static gcov_unsigned_t |
6dc33097 NS |
296 | gcov_exit_compute_summary (struct gcov_summary *this_prg, |
297 | size_t *max_length) | |
d6d3f033 RX |
298 | { |
299 | struct gcov_info *gi_ptr; | |
300 | const struct gcov_fn_info *gfi_ptr; | |
301 | struct gcov_ctr_summary *cs_ptr; | |
302 | const struct gcov_ctr_info *ci_ptr; | |
303 | int f_ix; | |
304 | unsigned t_ix; | |
305 | gcov_unsigned_t c_num; | |
867c8b03 | 306 | gcov_unsigned_t crc32 = 0; |
d6d3f033 | 307 | |
d6d3f033 | 308 | /* Find the totals for this execution. */ |
2c973ee7 | 309 | memset (this_prg, 0, sizeof (*this_prg)); |
6dc33097 | 310 | *max_length = 0; |
d6d3f033 RX |
311 | for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next) |
312 | { | |
6dc33097 NS |
313 | size_t len = strlen (gi_ptr->filename); |
314 | if (len > *max_length) | |
315 | *max_length = len; | |
316 | ||
d6d3f033 RX |
317 | crc32 = crc32_unsigned (crc32, gi_ptr->stamp); |
318 | crc32 = crc32_unsigned (crc32, gi_ptr->n_functions); | |
319 | ||
320 | for (f_ix = 0; (unsigned)f_ix != gi_ptr->n_functions; f_ix++) | |
321 | { | |
322 | gfi_ptr = gi_ptr->functions[f_ix]; | |
323 | ||
324 | if (gfi_ptr && gfi_ptr->key != gi_ptr) | |
325 | gfi_ptr = 0; | |
326 | ||
327 | crc32 = crc32_unsigned (crc32, gfi_ptr ? gfi_ptr->cfg_checksum : 0); | |
328 | crc32 = crc32_unsigned (crc32, | |
329 | gfi_ptr ? gfi_ptr->lineno_checksum : 0); | |
330 | if (!gfi_ptr) | |
331 | continue; | |
332 | ||
333 | ci_ptr = gfi_ptr->ctrs; | |
334 | for (t_ix = 0; t_ix != GCOV_COUNTERS_SUMMABLE; t_ix++) | |
335 | { | |
336 | if (!gi_ptr->merge[t_ix]) | |
337 | continue; | |
338 | ||
2c973ee7 | 339 | cs_ptr = &(this_prg->ctrs[t_ix]); |
d6d3f033 RX |
340 | cs_ptr->num += ci_ptr->num; |
341 | crc32 = crc32_unsigned (crc32, ci_ptr->num); | |
342 | ||
343 | for (c_num = 0; c_num < ci_ptr->num; c_num++) | |
344 | { | |
345 | cs_ptr->sum_all += ci_ptr->values[c_num]; | |
346 | if (cs_ptr->run_max < ci_ptr->values[c_num]) | |
347 | cs_ptr->run_max = ci_ptr->values[c_num]; | |
348 | } | |
349 | ci_ptr++; | |
350 | } | |
351 | } | |
352 | } | |
2c973ee7 | 353 | gcov_compute_histogram (this_prg); |
867c8b03 | 354 | return crc32; |
d6d3f033 RX |
355 | } |
356 | ||
d6d3f033 RX |
357 | /* Including system dependent components. */ |
358 | #include "libgcov-driver-system.c" | |
359 | ||
360 | /* This function merges counters in GI_PTR to an existing gcda file. | |
361 | Return 0 on success. | |
362 | Return -1 on error. In this case, caller will goto read_fatal. */ | |
363 | ||
364 | static int | |
6dc33097 NS |
365 | gcov_exit_merge_gcda (const char *filename, |
366 | struct gcov_info *gi_ptr, | |
d6d3f033 | 367 | struct gcov_summary *prg_p, |
2c973ee7 | 368 | struct gcov_summary *this_prg, |
d6d3f033 | 369 | gcov_position_t *summary_pos_p, |
867c8b03 JH |
370 | gcov_position_t *eof_pos_p, |
371 | gcov_unsigned_t crc32) | |
d6d3f033 RX |
372 | { |
373 | gcov_unsigned_t tag, length; | |
374 | unsigned t_ix; | |
375 | int f_ix; | |
376 | int error = 0; | |
377 | struct gcov_fn_buffer **fn_tail = &fn_buffer; | |
378 | struct gcov_summary_buffer **sum_tail = &sum_buffer; | |
379 | ||
380 | length = gcov_read_unsigned (); | |
6dc33097 | 381 | if (!gcov_version (gi_ptr, length, filename)) |
d6d3f033 RX |
382 | return -1; |
383 | ||
384 | length = gcov_read_unsigned (); | |
385 | if (length != gi_ptr->stamp) | |
386 | /* Read from a different compilation. Overwrite the file. */ | |
387 | return 0; | |
388 | ||
389 | /* Look for program summary. */ | |
390 | for (f_ix = 0;;) | |
391 | { | |
392 | struct gcov_summary tmp; | |
393 | ||
394 | *eof_pos_p = gcov_position (); | |
395 | tag = gcov_read_unsigned (); | |
396 | if (tag != GCOV_TAG_PROGRAM_SUMMARY) | |
397 | break; | |
398 | ||
399 | f_ix--; | |
400 | length = gcov_read_unsigned (); | |
401 | gcov_read_summary (&tmp); | |
402 | if ((error = gcov_is_error ())) | |
403 | goto read_error; | |
404 | if (*summary_pos_p) | |
405 | { | |
406 | /* Save all summaries after the one that will be | |
407 | merged into below. These will need to be rewritten | |
408 | as histogram merging may change the number of non-zero | |
409 | histogram entries that will be emitted, and thus the | |
410 | size of the merged summary. */ | |
411 | (*sum_tail) = (struct gcov_summary_buffer *) | |
40d6b753 | 412 | xmalloc (sizeof(struct gcov_summary_buffer)); |
d6d3f033 RX |
413 | (*sum_tail)->summary = tmp; |
414 | (*sum_tail)->next = 0; | |
415 | sum_tail = &((*sum_tail)->next); | |
416 | goto next_summary; | |
417 | } | |
418 | if (tmp.checksum != crc32) | |
419 | goto next_summary; | |
420 | ||
421 | for (t_ix = 0; t_ix != GCOV_COUNTERS_SUMMABLE; t_ix++) | |
2c973ee7 | 422 | if (tmp.ctrs[t_ix].num != this_prg->ctrs[t_ix].num) |
d6d3f033 RX |
423 | goto next_summary; |
424 | *prg_p = tmp; | |
425 | *summary_pos_p = *eof_pos_p; | |
426 | ||
427 | next_summary:; | |
428 | } | |
429 | ||
430 | /* Merge execution counts for each function. */ | |
431 | for (f_ix = 0; (unsigned)f_ix != gi_ptr->n_functions; | |
432 | f_ix++, tag = gcov_read_unsigned ()) | |
433 | { | |
434 | const struct gcov_ctr_info *ci_ptr; | |
435 | const struct gcov_fn_info *gfi_ptr = gi_ptr->functions[f_ix]; | |
436 | ||
437 | if (tag != GCOV_TAG_FUNCTION) | |
438 | goto read_mismatch; | |
439 | ||
440 | length = gcov_read_unsigned (); | |
441 | if (!length) | |
442 | /* This function did not appear in the other program. | |
443 | We have nothing to merge. */ | |
444 | continue; | |
445 | ||
446 | if (length != GCOV_TAG_FUNCTION_LENGTH) | |
447 | goto read_mismatch; | |
448 | ||
449 | if (!gfi_ptr || gfi_ptr->key != gi_ptr) | |
450 | { | |
451 | /* This function appears in the other program. We | |
452 | need to buffer the information in order to write | |
453 | it back out -- we'll be inserting data before | |
454 | this point, so cannot simply keep the data in the | |
455 | file. */ | |
6dc33097 | 456 | fn_tail = buffer_fn_data (filename, gi_ptr, fn_tail, f_ix); |
d6d3f033 RX |
457 | if (!fn_tail) |
458 | goto read_mismatch; | |
459 | continue; | |
460 | } | |
461 | ||
462 | length = gcov_read_unsigned (); | |
463 | if (length != gfi_ptr->ident) | |
464 | goto read_mismatch; | |
465 | ||
466 | length = gcov_read_unsigned (); | |
467 | if (length != gfi_ptr->lineno_checksum) | |
468 | goto read_mismatch; | |
469 | ||
470 | length = gcov_read_unsigned (); | |
471 | if (length != gfi_ptr->cfg_checksum) | |
472 | goto read_mismatch; | |
473 | ||
474 | ci_ptr = gfi_ptr->ctrs; | |
475 | for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++) | |
476 | { | |
477 | gcov_merge_fn merge = gi_ptr->merge[t_ix]; | |
478 | ||
479 | if (!merge) | |
480 | continue; | |
481 | ||
482 | tag = gcov_read_unsigned (); | |
483 | length = gcov_read_unsigned (); | |
484 | if (tag != GCOV_TAG_FOR_COUNTER (t_ix) | |
485 | || length != GCOV_TAG_COUNTER_LENGTH (ci_ptr->num)) | |
486 | goto read_mismatch; | |
487 | (*merge) (ci_ptr->values, ci_ptr->num); | |
488 | ci_ptr++; | |
489 | } | |
490 | if ((error = gcov_is_error ())) | |
491 | goto read_error; | |
492 | } | |
493 | ||
494 | if (tag) | |
495 | { | |
496 | read_mismatch:; | |
497 | gcov_error ("profiling:%s:Merge mismatch for %s %u\n", | |
6dc33097 | 498 | filename, f_ix >= 0 ? "function" : "summary", |
d6d3f033 RX |
499 | f_ix < 0 ? -1 - f_ix : f_ix); |
500 | return -1; | |
501 | } | |
502 | return 0; | |
503 | ||
504 | read_error: | |
6dc33097 | 505 | gcov_error ("profiling:%s:%s merging\n", filename, |
d6d3f033 RX |
506 | error < 0 ? "Overflow": "Error"); |
507 | return -1; | |
508 | } | |
509 | ||
510 | /* Write counters in GI_PTR and the summary in PRG to a gcda file. In | |
511 | the case of appending to an existing file, SUMMARY_POS will be non-zero. | |
512 | We will write the file starting from SUMMAY_POS. */ | |
513 | ||
514 | static void | |
515 | gcov_exit_write_gcda (const struct gcov_info *gi_ptr, | |
516 | const struct gcov_summary *prg_p, | |
517 | const gcov_position_t eof_pos, | |
518 | const gcov_position_t summary_pos) | |
519 | { | |
520 | unsigned f_ix; | |
521 | struct gcov_summary_buffer *next_sum_buffer; | |
522 | ||
523 | /* Write out the data. */ | |
524 | if (!eof_pos) | |
525 | { | |
526 | gcov_write_tag_length (GCOV_DATA_MAGIC, GCOV_VERSION); | |
527 | gcov_write_unsigned (gi_ptr->stamp); | |
528 | } | |
529 | ||
530 | if (summary_pos) | |
531 | gcov_seek (summary_pos); | |
532 | ||
533 | /* Generate whole program statistics. */ | |
534 | gcov_write_summary (GCOV_TAG_PROGRAM_SUMMARY, prg_p); | |
535 | ||
536 | /* Rewrite all the summaries that were after the summary we merged | |
537 | into. This is necessary as the merged summary may have a different | |
538 | size due to the number of non-zero histogram entries changing after | |
539 | merging. */ | |
540 | ||
541 | while (sum_buffer) | |
542 | { | |
543 | gcov_write_summary (GCOV_TAG_PROGRAM_SUMMARY, &sum_buffer->summary); | |
544 | next_sum_buffer = sum_buffer->next; | |
545 | free (sum_buffer); | |
546 | sum_buffer = next_sum_buffer; | |
547 | } | |
548 | ||
549 | /* Write execution counts for each function. */ | |
550 | for (f_ix = 0; f_ix != gi_ptr->n_functions; f_ix++) | |
551 | { | |
552 | unsigned buffered = 0; | |
553 | const struct gcov_fn_info *gfi_ptr; | |
554 | const struct gcov_ctr_info *ci_ptr; | |
555 | gcov_unsigned_t length; | |
556 | unsigned t_ix; | |
557 | ||
558 | if (fn_buffer && fn_buffer->fn_ix == f_ix) | |
559 | { | |
560 | /* Buffered data from another program. */ | |
561 | buffered = 1; | |
562 | gfi_ptr = &fn_buffer->info; | |
563 | length = GCOV_TAG_FUNCTION_LENGTH; | |
564 | } | |
565 | else | |
566 | { | |
567 | gfi_ptr = gi_ptr->functions[f_ix]; | |
568 | if (gfi_ptr && gfi_ptr->key == gi_ptr) | |
569 | length = GCOV_TAG_FUNCTION_LENGTH; | |
570 | else | |
571 | length = 0; | |
572 | } | |
573 | ||
574 | gcov_write_tag_length (GCOV_TAG_FUNCTION, length); | |
575 | if (!length) | |
576 | continue; | |
577 | ||
578 | gcov_write_unsigned (gfi_ptr->ident); | |
579 | gcov_write_unsigned (gfi_ptr->lineno_checksum); | |
580 | gcov_write_unsigned (gfi_ptr->cfg_checksum); | |
581 | ||
582 | ci_ptr = gfi_ptr->ctrs; | |
583 | for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++) | |
584 | { | |
585 | gcov_unsigned_t n_counts; | |
586 | gcov_type *c_ptr; | |
587 | ||
588 | if (!gi_ptr->merge[t_ix]) | |
589 | continue; | |
590 | ||
591 | n_counts = ci_ptr->num; | |
592 | gcov_write_tag_length (GCOV_TAG_FOR_COUNTER (t_ix), | |
593 | GCOV_TAG_COUNTER_LENGTH (n_counts)); | |
594 | c_ptr = ci_ptr->values; | |
595 | while (n_counts--) | |
596 | gcov_write_counter (*c_ptr++); | |
597 | ci_ptr++; | |
598 | } | |
599 | if (buffered) | |
600 | fn_buffer = free_fn_data (gi_ptr, fn_buffer, GCOV_COUNTERS); | |
601 | } | |
602 | ||
603 | gcov_write_unsigned (0); | |
604 | } | |
605 | ||
606 | /* Helper function for merging summary. | |
607 | Return -1 on error. Return 0 on success. */ | |
608 | ||
609 | static int | |
6dc33097 NS |
610 | gcov_exit_merge_summary (const char *filename, |
611 | const struct gcov_info *gi_ptr, struct gcov_summary *prg, | |
2c973ee7 | 612 | struct gcov_summary *this_prg, gcov_unsigned_t crc32, |
7f369373 | 613 | struct gcov_summary *all_prg __attribute__ ((unused))) |
d6d3f033 RX |
614 | { |
615 | struct gcov_ctr_summary *cs_prg, *cs_tprg; | |
d6d3f033 | 616 | unsigned t_ix; |
867c8b03 JH |
617 | #if !GCOV_LOCKED |
618 | /* summary for all instances of program. */ | |
619 | struct gcov_ctr_summary *cs_all; | |
620 | #endif | |
d6d3f033 RX |
621 | |
622 | /* Merge the summaries. */ | |
623 | for (t_ix = 0; t_ix < GCOV_COUNTERS_SUMMABLE; t_ix++) | |
624 | { | |
625 | cs_prg = &(prg->ctrs[t_ix]); | |
2c973ee7 | 626 | cs_tprg = &(this_prg->ctrs[t_ix]); |
d6d3f033 RX |
627 | |
628 | if (gi_ptr->merge[t_ix]) | |
629 | { | |
867c8b03 JH |
630 | int first = !cs_prg->runs; |
631 | ||
632 | if (!run_accounted) | |
633 | cs_prg->runs++; | |
867c8b03 | 634 | if (first) |
d6d3f033 RX |
635 | cs_prg->num = cs_tprg->num; |
636 | cs_prg->sum_all += cs_tprg->sum_all; | |
637 | if (cs_prg->run_max < cs_tprg->run_max) | |
638 | cs_prg->run_max = cs_tprg->run_max; | |
639 | cs_prg->sum_max += cs_tprg->run_max; | |
867c8b03 | 640 | if (first) |
d6d3f033 RX |
641 | memcpy (cs_prg->histogram, cs_tprg->histogram, |
642 | sizeof (gcov_bucket_type) * GCOV_HISTOGRAM_SIZE); | |
643 | else | |
644 | gcov_histogram_merge (cs_prg->histogram, cs_tprg->histogram); | |
645 | } | |
646 | else if (cs_prg->runs) | |
647 | { | |
648 | gcov_error ("profiling:%s:Merge mismatch for summary.\n", | |
6dc33097 | 649 | filename); |
d6d3f033 RX |
650 | return -1; |
651 | } | |
d6d3f033 | 652 | #if !GCOV_LOCKED |
867c8b03 | 653 | cs_all = &all_prg->ctrs[t_ix]; |
d6d3f033 RX |
654 | if (!cs_all->runs && cs_prg->runs) |
655 | { | |
656 | cs_all->num = cs_prg->num; | |
657 | cs_all->runs = cs_prg->runs; | |
658 | cs_all->sum_all = cs_prg->sum_all; | |
659 | cs_all->run_max = cs_prg->run_max; | |
660 | cs_all->sum_max = cs_prg->sum_max; | |
661 | } | |
867c8b03 | 662 | else if (!all_prg->checksum |
d6d3f033 RX |
663 | /* Don't compare the histograms, which may have slight |
664 | variations depending on the order they were updated | |
665 | due to the truncating integer divides used in the | |
666 | merge. */ | |
667 | && (cs_all->num != cs_prg->num | |
668 | || cs_all->runs != cs_prg->runs | |
669 | || cs_all->sum_all != cs_prg->sum_all | |
670 | || cs_all->run_max != cs_prg->run_max | |
671 | || cs_all->sum_max != cs_prg->sum_max)) | |
672 | { | |
673 | gcov_error ("profiling:%s:Data file mismatch - some " | |
674 | "data files may have been concurrently " | |
6dc33097 | 675 | "updated without locking support\n", filename); |
867c8b03 | 676 | all_prg->checksum = ~0u; |
d6d3f033 RX |
677 | } |
678 | #endif | |
679 | } | |
40d6b753 | 680 | |
d6d3f033 RX |
681 | prg->checksum = crc32; |
682 | ||
683 | return 0; | |
684 | } | |
685 | ||
686 | /* Dump the coverage counts for one gcov_info object. We merge with existing | |
687 | counts when possible, to avoid growing the .da files ad infinitum. We use | |
688 | this program's checksum to make sure we only accumulate whole program | |
689 | statistics to the correct summary. An object file might be embedded | |
690 | in two separate programs, and we must keep the two program | |
691 | summaries separate. */ | |
692 | ||
693 | static void | |
6dc33097 | 694 | gcov_exit_dump_gcov (struct gcov_info *gi_ptr, struct gcov_filename *gf, |
2c973ee7 RX |
695 | gcov_unsigned_t crc32, struct gcov_summary *all_prg, |
696 | struct gcov_summary *this_prg) | |
d6d3f033 RX |
697 | { |
698 | struct gcov_summary prg; /* summary for this object over all program. */ | |
699 | int error; | |
700 | gcov_unsigned_t tag; | |
701 | gcov_position_t summary_pos = 0; | |
702 | gcov_position_t eof_pos = 0; | |
703 | ||
704 | fn_buffer = 0; | |
705 | sum_buffer = 0; | |
706 | ||
707 | error = gcov_exit_open_gcda_file (gi_ptr, gf); | |
708 | if (error == -1) | |
709 | return; | |
710 | ||
711 | tag = gcov_read_unsigned (); | |
712 | if (tag) | |
713 | { | |
714 | /* Merge data from file. */ | |
715 | if (tag != GCOV_DATA_MAGIC) | |
716 | { | |
6dc33097 | 717 | gcov_error ("profiling:%s:Not a gcov data file\n", gf->filename); |
d6d3f033 RX |
718 | goto read_fatal; |
719 | } | |
6dc33097 NS |
720 | error = gcov_exit_merge_gcda (gf->filename, gi_ptr, &prg, this_prg, |
721 | &summary_pos, &eof_pos, crc32); | |
d6d3f033 RX |
722 | if (error == -1) |
723 | goto read_fatal; | |
724 | } | |
725 | ||
726 | gcov_rewrite (); | |
727 | ||
728 | if (!summary_pos) | |
729 | { | |
730 | memset (&prg, 0, sizeof (prg)); | |
731 | summary_pos = eof_pos; | |
732 | } | |
733 | ||
6dc33097 NS |
734 | error = gcov_exit_merge_summary (gf->filename, gi_ptr, &prg, this_prg, |
735 | crc32, all_prg); | |
d6d3f033 RX |
736 | if (error == -1) |
737 | goto read_fatal; | |
738 | ||
739 | gcov_exit_write_gcda (gi_ptr, &prg, eof_pos, summary_pos); | |
740 | /* fall through */ | |
741 | ||
742 | read_fatal:; | |
743 | while (fn_buffer) | |
744 | fn_buffer = free_fn_data (gi_ptr, fn_buffer, GCOV_COUNTERS); | |
745 | ||
746 | if ((error = gcov_close ())) | |
747 | gcov_error (error < 0 ? | |
748 | "profiling:%s:Overflow writing\n" : | |
749 | "profiling:%s:Error writing\n", | |
6dc33097 | 750 | gf->filename); |
d6d3f033 RX |
751 | } |
752 | ||
753 | ||
754 | /* Dump all the coverage counts for the program. It first computes program | |
755 | summary and then traverses gcov_list list and dumps the gcov_info | |
756 | objects one by one. */ | |
757 | ||
758 | void | |
759 | gcov_exit (void) | |
760 | { | |
761 | struct gcov_info *gi_ptr; | |
6dc33097 | 762 | struct gcov_filename gf; |
867c8b03 JH |
763 | gcov_unsigned_t crc32; |
764 | struct gcov_summary all_prg; | |
2c973ee7 | 765 | struct gcov_summary this_prg; |
d6d3f033 RX |
766 | |
767 | /* Prevent the counters from being dumped a second time on exit when the | |
768 | application already wrote out the profile using __gcov_dump(). */ | |
769 | if (gcov_dump_complete) | |
770 | return; | |
771 | ||
770f687d | 772 | gcov_dump_complete = 1; |
6dc33097 NS |
773 | |
774 | crc32 = gcov_exit_compute_summary (&this_prg, &gf.max_length); | |
d6d3f033 RX |
775 | |
776 | allocate_filename_struct (&gf); | |
867c8b03 JH |
777 | #if !GCOV_LOCKED |
778 | memset (&all_prg, 0, sizeof (all_prg)); | |
779 | #endif | |
d6d3f033 RX |
780 | |
781 | /* Now merge each file. */ | |
782 | for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next) | |
2c973ee7 | 783 | gcov_exit_dump_gcov (gi_ptr, &gf, crc32, &all_prg, &this_prg); |
7f369373 | 784 | run_accounted = 1; |
d6d3f033 | 785 | |
6dc33097 | 786 | free (gf.filename); |
d6d3f033 RX |
787 | } |
788 | ||
789 | /* Reset all counters to zero. */ | |
790 | ||
791 | void | |
792 | gcov_clear (void) | |
793 | { | |
794 | const struct gcov_info *gi_ptr; | |
795 | ||
770f687d | 796 | gcov_dump_complete = 0; |
d6d3f033 RX |
797 | for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next) |
798 | { | |
799 | unsigned f_ix; | |
800 | ||
801 | for (f_ix = 0; f_ix < gi_ptr->n_functions; f_ix++) | |
802 | { | |
803 | unsigned t_ix; | |
804 | const struct gcov_fn_info *gfi_ptr = gi_ptr->functions[f_ix]; | |
805 | ||
806 | if (!gfi_ptr || gfi_ptr->key != gi_ptr) | |
807 | continue; | |
808 | const struct gcov_ctr_info *ci_ptr = gfi_ptr->ctrs; | |
809 | for (t_ix = 0; t_ix != GCOV_COUNTERS; t_ix++) | |
810 | { | |
811 | if (!gi_ptr->merge[t_ix]) | |
812 | continue; | |
813 | ||
814 | memset (ci_ptr->values, 0, sizeof (gcov_type) * ci_ptr->num); | |
815 | ci_ptr++; | |
816 | } | |
817 | } | |
818 | } | |
819 | } | |
820 | ||
821 | /* Add a new object file onto the bb chain. Invoked automatically | |
822 | when running an object file's global ctors. */ | |
823 | ||
824 | void | |
825 | __gcov_init (struct gcov_info *info) | |
826 | { | |
827 | if (!info->version || !info->n_functions) | |
828 | return; | |
829 | if (gcov_version (info, info->version, 0)) | |
830 | { | |
d6d3f033 RX |
831 | if (!gcov_list) |
832 | atexit (gcov_exit); | |
833 | ||
834 | info->next = gcov_list; | |
835 | gcov_list = info; | |
836 | } | |
837 | info->version = 0; | |
838 | } | |
839 | ||
840 | #endif /* L_gcov */ | |
841 | #endif /* inhibit_libc */ |