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d6d3f033 RX |
1 | /* Routines required for instrumenting a program. */ |
2 | /* Compile this one with gcc. */ | |
85ec4feb | 3 | /* Copyright (C) 1989-2018 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 | 45 | |
8aa5bdd6 | 46 | /* A utility function for outputting errors. */ |
e3f0315f TJ |
47 | static int gcov_error (const char *, ...); |
48 | ||
8aa5bdd6 AC |
49 | #if !IN_GCOV_TOOL |
50 | static void gcov_error_exit (void); | |
51 | #endif | |
52 | ||
d6d3f033 RX |
53 | #include "gcov-io.c" |
54 | ||
d6d3f033 RX |
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 RX |
80 | static struct gcov_fn_buffer * |
81 | free_fn_data (const struct gcov_info *gi_ptr, struct gcov_fn_buffer *buffer, | |
82 | unsigned limit) | |
83 | { | |
84 | struct gcov_fn_buffer *next; | |
85 | unsigned ix, n_ctr = 0; | |
86 | ||
87 | if (!buffer) | |
88 | return 0; | |
89 | next = buffer->next; | |
90 | ||
91 | for (ix = 0; ix != limit; ix++) | |
92 | if (gi_ptr->merge[ix]) | |
93 | free (buffer->info.ctrs[n_ctr++].values); | |
94 | free (buffer); | |
95 | return next; | |
96 | } | |
97 | ||
98 | static struct gcov_fn_buffer ** | |
99 | buffer_fn_data (const char *filename, const struct gcov_info *gi_ptr, | |
100 | struct gcov_fn_buffer **end_ptr, unsigned fn_ix) | |
101 | { | |
102 | unsigned n_ctrs = 0, ix = 0; | |
103 | struct gcov_fn_buffer *fn_buffer; | |
104 | unsigned len; | |
105 | ||
106 | for (ix = GCOV_COUNTERS; ix--;) | |
107 | if (gi_ptr->merge[ix]) | |
108 | n_ctrs++; | |
109 | ||
110 | len = sizeof (*fn_buffer) + sizeof (fn_buffer->info.ctrs[0]) * n_ctrs; | |
40d6b753 | 111 | fn_buffer = (struct gcov_fn_buffer *) xmalloc (len); |
d6d3f033 RX |
112 | |
113 | if (!fn_buffer) | |
114 | goto fail; | |
115 | ||
116 | fn_buffer->next = 0; | |
117 | fn_buffer->fn_ix = fn_ix; | |
118 | fn_buffer->info.ident = gcov_read_unsigned (); | |
119 | fn_buffer->info.lineno_checksum = gcov_read_unsigned (); | |
120 | fn_buffer->info.cfg_checksum = gcov_read_unsigned (); | |
121 | ||
122 | for (n_ctrs = ix = 0; ix != GCOV_COUNTERS; ix++) | |
123 | { | |
124 | gcov_unsigned_t length; | |
125 | gcov_type *values; | |
126 | ||
127 | if (!gi_ptr->merge[ix]) | |
128 | continue; | |
129 | ||
130 | if (gcov_read_unsigned () != GCOV_TAG_FOR_COUNTER (ix)) | |
131 | { | |
132 | len = 0; | |
133 | goto fail; | |
134 | } | |
135 | ||
136 | length = GCOV_TAG_COUNTER_NUM (gcov_read_unsigned ()); | |
137 | len = length * sizeof (gcov_type); | |
40d6b753 | 138 | values = (gcov_type *) xmalloc (len); |
d6d3f033 RX |
139 | if (!values) |
140 | goto fail; | |
141 | ||
142 | fn_buffer->info.ctrs[n_ctrs].num = length; | |
143 | fn_buffer->info.ctrs[n_ctrs].values = values; | |
144 | ||
145 | while (length--) | |
146 | *values++ = gcov_read_counter (); | |
147 | n_ctrs++; | |
148 | } | |
149 | ||
150 | *end_ptr = fn_buffer; | |
151 | return &fn_buffer->next; | |
152 | ||
153 | fail: | |
154 | gcov_error ("profiling:%s:Function %u %s %u \n", filename, fn_ix, | |
155 | len ? "cannot allocate" : "counter mismatch", len ? len : ix); | |
156 | ||
157 | return (struct gcov_fn_buffer **)free_fn_data (gi_ptr, fn_buffer, ix); | |
158 | } | |
159 | ||
160 | /* Add an unsigned value to the current crc */ | |
161 | ||
162 | static gcov_unsigned_t | |
163 | crc32_unsigned (gcov_unsigned_t crc32, gcov_unsigned_t value) | |
164 | { | |
165 | unsigned ix; | |
166 | ||
167 | for (ix = 32; ix--; value <<= 1) | |
168 | { | |
169 | unsigned feedback; | |
170 | ||
171 | feedback = (value ^ crc32) & 0x80000000 ? 0x04c11db7 : 0; | |
172 | crc32 <<= 1; | |
173 | crc32 ^= feedback; | |
174 | } | |
175 | ||
176 | return crc32; | |
177 | } | |
178 | ||
179 | /* Check if VERSION of the info block PTR matches libgcov one. | |
180 | Return 1 on success, or zero in case of versions mismatch. | |
181 | If FILENAME is not NULL, its value used for reporting purposes | |
182 | instead of value from the info block. */ | |
183 | ||
184 | static int | |
185 | gcov_version (struct gcov_info *ptr, gcov_unsigned_t version, | |
186 | const char *filename) | |
187 | { | |
188 | if (version != GCOV_VERSION) | |
189 | { | |
190 | char v[4], e[4]; | |
191 | ||
192 | GCOV_UNSIGNED2STRING (v, version); | |
193 | GCOV_UNSIGNED2STRING (e, GCOV_VERSION); | |
194 | ||
195 | gcov_error ("profiling:%s:Version mismatch - expected %.4s got %.4s\n", | |
196 | filename? filename : ptr->filename, e, v); | |
197 | return 0; | |
198 | } | |
199 | return 1; | |
200 | } | |
201 | ||
202 | /* Insert counter VALUE into HISTOGRAM. */ | |
203 | ||
204 | static void | |
205 | gcov_histogram_insert(gcov_bucket_type *histogram, gcov_type value) | |
206 | { | |
207 | unsigned i; | |
208 | ||
209 | i = gcov_histo_index(value); | |
210 | histogram[i].num_counters++; | |
211 | histogram[i].cum_value += value; | |
212 | if (value < histogram[i].min_value) | |
213 | histogram[i].min_value = value; | |
214 | } | |
215 | ||
216 | /* Computes a histogram of the arc counters to place in the summary SUM. */ | |
217 | ||
218 | static void | |
4303c581 | 219 | gcov_compute_histogram (struct gcov_info *list, struct gcov_summary *sum) |
d6d3f033 RX |
220 | { |
221 | struct gcov_info *gi_ptr; | |
222 | const struct gcov_fn_info *gfi_ptr; | |
223 | const struct gcov_ctr_info *ci_ptr; | |
224 | struct gcov_ctr_summary *cs_ptr; | |
225 | unsigned t_ix, f_ix, ctr_info_ix, ix; | |
226 | int h_ix; | |
227 | ||
228 | /* This currently only applies to arc counters. */ | |
229 | t_ix = GCOV_COUNTER_ARCS; | |
230 | ||
231 | /* First check if there are any counts recorded for this counter. */ | |
232 | cs_ptr = &(sum->ctrs[t_ix]); | |
233 | if (!cs_ptr->num) | |
234 | return; | |
235 | ||
236 | for (h_ix = 0; h_ix < GCOV_HISTOGRAM_SIZE; h_ix++) | |
237 | { | |
238 | cs_ptr->histogram[h_ix].num_counters = 0; | |
239 | cs_ptr->histogram[h_ix].min_value = cs_ptr->run_max; | |
240 | cs_ptr->histogram[h_ix].cum_value = 0; | |
241 | } | |
242 | ||
243 | /* Walk through all the per-object structures and record each of | |
244 | the count values in histogram. */ | |
4303c581 | 245 | for (gi_ptr = list; gi_ptr; gi_ptr = gi_ptr->next) |
d6d3f033 RX |
246 | { |
247 | if (!gi_ptr->merge[t_ix]) | |
248 | continue; | |
249 | ||
250 | /* Find the appropriate index into the gcov_ctr_info array | |
251 | for the counter we are currently working on based on the | |
252 | existence of the merge function pointer for this object. */ | |
253 | for (ix = 0, ctr_info_ix = 0; ix < t_ix; ix++) | |
254 | { | |
255 | if (gi_ptr->merge[ix]) | |
256 | ctr_info_ix++; | |
257 | } | |
258 | for (f_ix = 0; f_ix != gi_ptr->n_functions; f_ix++) | |
259 | { | |
260 | gfi_ptr = gi_ptr->functions[f_ix]; | |
261 | ||
262 | if (!gfi_ptr || gfi_ptr->key != gi_ptr) | |
263 | continue; | |
264 | ||
265 | ci_ptr = &gfi_ptr->ctrs[ctr_info_ix]; | |
266 | for (ix = 0; ix < ci_ptr->num; ix++) | |
267 | gcov_histogram_insert (cs_ptr->histogram, ci_ptr->values[ix]); | |
268 | } | |
269 | } | |
270 | } | |
271 | ||
d6d3f033 RX |
272 | /* buffer for the fn_data from another program. */ |
273 | static struct gcov_fn_buffer *fn_buffer; | |
274 | /* buffer for summary from other programs to be written out. */ | |
275 | static struct gcov_summary_buffer *sum_buffer; | |
276 | ||
6dc33097 NS |
277 | /* This function computes the program level summary and the histo-gram. |
278 | It computes and returns CRC32 and stored summary in THIS_PRG. | |
279 | Also determines the longest filename length of the info files. */ | |
d6d3f033 | 280 | |
9b84e7a8 RX |
281 | #if !IN_GCOV_TOOL |
282 | static | |
283 | #endif | |
284 | gcov_unsigned_t | |
19926161 NS |
285 | compute_summary (struct gcov_info *list, struct gcov_summary *this_prg, |
286 | size_t *max_length) | |
d6d3f033 RX |
287 | { |
288 | struct gcov_info *gi_ptr; | |
289 | const struct gcov_fn_info *gfi_ptr; | |
290 | struct gcov_ctr_summary *cs_ptr; | |
291 | const struct gcov_ctr_info *ci_ptr; | |
292 | int f_ix; | |
293 | unsigned t_ix; | |
294 | gcov_unsigned_t c_num; | |
867c8b03 | 295 | gcov_unsigned_t crc32 = 0; |
d6d3f033 | 296 | |
d6d3f033 | 297 | /* Find the totals for this execution. */ |
2c973ee7 | 298 | memset (this_prg, 0, sizeof (*this_prg)); |
6dc33097 | 299 | *max_length = 0; |
19926161 | 300 | for (gi_ptr = list; gi_ptr; gi_ptr = gi_ptr->next) |
d6d3f033 | 301 | { |
6dc33097 NS |
302 | size_t len = strlen (gi_ptr->filename); |
303 | if (len > *max_length) | |
304 | *max_length = len; | |
305 | ||
d6d3f033 RX |
306 | crc32 = crc32_unsigned (crc32, gi_ptr->stamp); |
307 | crc32 = crc32_unsigned (crc32, gi_ptr->n_functions); | |
308 | ||
309 | for (f_ix = 0; (unsigned)f_ix != gi_ptr->n_functions; f_ix++) | |
310 | { | |
311 | gfi_ptr = gi_ptr->functions[f_ix]; | |
312 | ||
313 | if (gfi_ptr && gfi_ptr->key != gi_ptr) | |
314 | gfi_ptr = 0; | |
315 | ||
316 | crc32 = crc32_unsigned (crc32, gfi_ptr ? gfi_ptr->cfg_checksum : 0); | |
317 | crc32 = crc32_unsigned (crc32, | |
318 | gfi_ptr ? gfi_ptr->lineno_checksum : 0); | |
319 | if (!gfi_ptr) | |
320 | continue; | |
321 | ||
322 | ci_ptr = gfi_ptr->ctrs; | |
323 | for (t_ix = 0; t_ix != GCOV_COUNTERS_SUMMABLE; t_ix++) | |
324 | { | |
325 | if (!gi_ptr->merge[t_ix]) | |
326 | continue; | |
327 | ||
2c973ee7 | 328 | cs_ptr = &(this_prg->ctrs[t_ix]); |
d6d3f033 RX |
329 | cs_ptr->num += ci_ptr->num; |
330 | crc32 = crc32_unsigned (crc32, ci_ptr->num); | |
331 | ||
332 | for (c_num = 0; c_num < ci_ptr->num; c_num++) | |
333 | { | |
334 | cs_ptr->sum_all += ci_ptr->values[c_num]; | |
335 | if (cs_ptr->run_max < ci_ptr->values[c_num]) | |
336 | cs_ptr->run_max = ci_ptr->values[c_num]; | |
337 | } | |
338 | ci_ptr++; | |
339 | } | |
340 | } | |
341 | } | |
4303c581 | 342 | gcov_compute_histogram (list, this_prg); |
867c8b03 | 343 | return crc32; |
d6d3f033 RX |
344 | } |
345 | ||
d6d3f033 RX |
346 | /* Including system dependent components. */ |
347 | #include "libgcov-driver-system.c" | |
348 | ||
349 | /* This function merges counters in GI_PTR to an existing gcda file. | |
350 | Return 0 on success. | |
351 | Return -1 on error. In this case, caller will goto read_fatal. */ | |
352 | ||
353 | static int | |
19926161 NS |
354 | merge_one_data (const char *filename, |
355 | struct gcov_info *gi_ptr, | |
356 | struct gcov_summary *prg_p, | |
357 | struct gcov_summary *this_prg, | |
358 | gcov_position_t *summary_pos_p, | |
359 | gcov_position_t *eof_pos_p, | |
360 | gcov_unsigned_t crc32) | |
d6d3f033 RX |
361 | { |
362 | gcov_unsigned_t tag, length; | |
363 | unsigned t_ix; | |
364 | int f_ix; | |
365 | int error = 0; | |
366 | struct gcov_fn_buffer **fn_tail = &fn_buffer; | |
367 | struct gcov_summary_buffer **sum_tail = &sum_buffer; | |
368 | ||
369 | length = gcov_read_unsigned (); | |
6dc33097 | 370 | if (!gcov_version (gi_ptr, length, filename)) |
d6d3f033 RX |
371 | return -1; |
372 | ||
373 | length = gcov_read_unsigned (); | |
374 | if (length != gi_ptr->stamp) | |
375 | /* Read from a different compilation. Overwrite the file. */ | |
376 | return 0; | |
377 | ||
378 | /* Look for program summary. */ | |
379 | for (f_ix = 0;;) | |
380 | { | |
381 | struct gcov_summary tmp; | |
382 | ||
383 | *eof_pos_p = gcov_position (); | |
384 | tag = gcov_read_unsigned (); | |
385 | if (tag != GCOV_TAG_PROGRAM_SUMMARY) | |
386 | break; | |
387 | ||
388 | f_ix--; | |
389 | length = gcov_read_unsigned (); | |
390 | gcov_read_summary (&tmp); | |
391 | if ((error = gcov_is_error ())) | |
392 | goto read_error; | |
393 | if (*summary_pos_p) | |
394 | { | |
395 | /* Save all summaries after the one that will be | |
396 | merged into below. These will need to be rewritten | |
397 | as histogram merging may change the number of non-zero | |
398 | histogram entries that will be emitted, and thus the | |
399 | size of the merged summary. */ | |
400 | (*sum_tail) = (struct gcov_summary_buffer *) | |
40d6b753 | 401 | xmalloc (sizeof(struct gcov_summary_buffer)); |
d6d3f033 RX |
402 | (*sum_tail)->summary = tmp; |
403 | (*sum_tail)->next = 0; | |
404 | sum_tail = &((*sum_tail)->next); | |
405 | goto next_summary; | |
406 | } | |
407 | if (tmp.checksum != crc32) | |
408 | goto next_summary; | |
409 | ||
410 | for (t_ix = 0; t_ix != GCOV_COUNTERS_SUMMABLE; t_ix++) | |
2c973ee7 | 411 | if (tmp.ctrs[t_ix].num != this_prg->ctrs[t_ix].num) |
d6d3f033 RX |
412 | goto next_summary; |
413 | *prg_p = tmp; | |
414 | *summary_pos_p = *eof_pos_p; | |
415 | ||
416 | next_summary:; | |
417 | } | |
418 | ||
419 | /* Merge execution counts for each function. */ | |
420 | for (f_ix = 0; (unsigned)f_ix != gi_ptr->n_functions; | |
421 | f_ix++, tag = gcov_read_unsigned ()) | |
422 | { | |
423 | const struct gcov_ctr_info *ci_ptr; | |
424 | const struct gcov_fn_info *gfi_ptr = gi_ptr->functions[f_ix]; | |
425 | ||
426 | if (tag != GCOV_TAG_FUNCTION) | |
427 | goto read_mismatch; | |
428 | ||
429 | length = gcov_read_unsigned (); | |
430 | if (!length) | |
431 | /* This function did not appear in the other program. | |
432 | We have nothing to merge. */ | |
433 | continue; | |
434 | ||
435 | if (length != GCOV_TAG_FUNCTION_LENGTH) | |
436 | goto read_mismatch; | |
437 | ||
438 | if (!gfi_ptr || gfi_ptr->key != gi_ptr) | |
439 | { | |
440 | /* This function appears in the other program. We | |
441 | need to buffer the information in order to write | |
442 | it back out -- we'll be inserting data before | |
443 | this point, so cannot simply keep the data in the | |
444 | file. */ | |
6dc33097 | 445 | fn_tail = buffer_fn_data (filename, gi_ptr, fn_tail, f_ix); |
d6d3f033 RX |
446 | if (!fn_tail) |
447 | goto read_mismatch; | |
448 | continue; | |
449 | } | |
450 | ||
451 | length = gcov_read_unsigned (); | |
452 | if (length != gfi_ptr->ident) | |
453 | goto read_mismatch; | |
454 | ||
455 | length = gcov_read_unsigned (); | |
456 | if (length != gfi_ptr->lineno_checksum) | |
457 | goto read_mismatch; | |
458 | ||
459 | length = gcov_read_unsigned (); | |
460 | if (length != gfi_ptr->cfg_checksum) | |
461 | goto read_mismatch; | |
462 | ||
463 | ci_ptr = gfi_ptr->ctrs; | |
464 | for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++) | |
465 | { | |
466 | gcov_merge_fn merge = gi_ptr->merge[t_ix]; | |
467 | ||
468 | if (!merge) | |
469 | continue; | |
470 | ||
471 | tag = gcov_read_unsigned (); | |
472 | length = gcov_read_unsigned (); | |
473 | if (tag != GCOV_TAG_FOR_COUNTER (t_ix) | |
474 | || length != GCOV_TAG_COUNTER_LENGTH (ci_ptr->num)) | |
475 | goto read_mismatch; | |
476 | (*merge) (ci_ptr->values, ci_ptr->num); | |
477 | ci_ptr++; | |
478 | } | |
479 | if ((error = gcov_is_error ())) | |
480 | goto read_error; | |
481 | } | |
482 | ||
483 | if (tag) | |
484 | { | |
485 | read_mismatch:; | |
486 | gcov_error ("profiling:%s:Merge mismatch for %s %u\n", | |
6dc33097 | 487 | filename, f_ix >= 0 ? "function" : "summary", |
d6d3f033 RX |
488 | f_ix < 0 ? -1 - f_ix : f_ix); |
489 | return -1; | |
490 | } | |
491 | return 0; | |
492 | ||
493 | read_error: | |
6dc33097 | 494 | gcov_error ("profiling:%s:%s merging\n", filename, |
d6d3f033 RX |
495 | error < 0 ? "Overflow": "Error"); |
496 | return -1; | |
497 | } | |
498 | ||
499 | /* Write counters in GI_PTR and the summary in PRG to a gcda file. In | |
500 | the case of appending to an existing file, SUMMARY_POS will be non-zero. | |
501 | We will write the file starting from SUMMAY_POS. */ | |
502 | ||
503 | static void | |
19926161 NS |
504 | write_one_data (const struct gcov_info *gi_ptr, |
505 | const struct gcov_summary *prg_p, | |
506 | const gcov_position_t eof_pos, | |
507 | const gcov_position_t summary_pos) | |
d6d3f033 RX |
508 | { |
509 | unsigned f_ix; | |
510 | struct gcov_summary_buffer *next_sum_buffer; | |
511 | ||
512 | /* Write out the data. */ | |
513 | if (!eof_pos) | |
514 | { | |
515 | gcov_write_tag_length (GCOV_DATA_MAGIC, GCOV_VERSION); | |
516 | gcov_write_unsigned (gi_ptr->stamp); | |
517 | } | |
518 | ||
519 | if (summary_pos) | |
520 | gcov_seek (summary_pos); | |
521 | ||
522 | /* Generate whole program statistics. */ | |
523 | gcov_write_summary (GCOV_TAG_PROGRAM_SUMMARY, prg_p); | |
524 | ||
525 | /* Rewrite all the summaries that were after the summary we merged | |
526 | into. This is necessary as the merged summary may have a different | |
527 | size due to the number of non-zero histogram entries changing after | |
528 | merging. */ | |
529 | ||
530 | while (sum_buffer) | |
531 | { | |
532 | gcov_write_summary (GCOV_TAG_PROGRAM_SUMMARY, &sum_buffer->summary); | |
533 | next_sum_buffer = sum_buffer->next; | |
534 | free (sum_buffer); | |
535 | sum_buffer = next_sum_buffer; | |
536 | } | |
537 | ||
538 | /* Write execution counts for each function. */ | |
539 | for (f_ix = 0; f_ix != gi_ptr->n_functions; f_ix++) | |
540 | { | |
541 | unsigned buffered = 0; | |
542 | const struct gcov_fn_info *gfi_ptr; | |
543 | const struct gcov_ctr_info *ci_ptr; | |
544 | gcov_unsigned_t length; | |
545 | unsigned t_ix; | |
546 | ||
547 | if (fn_buffer && fn_buffer->fn_ix == f_ix) | |
548 | { | |
549 | /* Buffered data from another program. */ | |
550 | buffered = 1; | |
551 | gfi_ptr = &fn_buffer->info; | |
552 | length = GCOV_TAG_FUNCTION_LENGTH; | |
553 | } | |
554 | else | |
555 | { | |
556 | gfi_ptr = gi_ptr->functions[f_ix]; | |
557 | if (gfi_ptr && gfi_ptr->key == gi_ptr) | |
558 | length = GCOV_TAG_FUNCTION_LENGTH; | |
559 | else | |
560 | length = 0; | |
561 | } | |
562 | ||
563 | gcov_write_tag_length (GCOV_TAG_FUNCTION, length); | |
564 | if (!length) | |
565 | continue; | |
566 | ||
567 | gcov_write_unsigned (gfi_ptr->ident); | |
568 | gcov_write_unsigned (gfi_ptr->lineno_checksum); | |
569 | gcov_write_unsigned (gfi_ptr->cfg_checksum); | |
570 | ||
571 | ci_ptr = gfi_ptr->ctrs; | |
572 | for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++) | |
573 | { | |
574 | gcov_unsigned_t n_counts; | |
575 | gcov_type *c_ptr; | |
576 | ||
577 | if (!gi_ptr->merge[t_ix]) | |
578 | continue; | |
579 | ||
580 | n_counts = ci_ptr->num; | |
581 | gcov_write_tag_length (GCOV_TAG_FOR_COUNTER (t_ix), | |
582 | GCOV_TAG_COUNTER_LENGTH (n_counts)); | |
583 | c_ptr = ci_ptr->values; | |
584 | while (n_counts--) | |
585 | gcov_write_counter (*c_ptr++); | |
586 | ci_ptr++; | |
587 | } | |
588 | if (buffered) | |
589 | fn_buffer = free_fn_data (gi_ptr, fn_buffer, GCOV_COUNTERS); | |
590 | } | |
591 | ||
592 | gcov_write_unsigned (0); | |
593 | } | |
594 | ||
595 | /* Helper function for merging summary. | |
596 | Return -1 on error. Return 0 on success. */ | |
597 | ||
598 | static int | |
19926161 NS |
599 | merge_summary (const char *filename, int run_counted, |
600 | const struct gcov_info *gi_ptr, struct gcov_summary *prg, | |
601 | struct gcov_summary *this_prg, gcov_unsigned_t crc32, | |
602 | struct gcov_summary *all_prg __attribute__ ((unused))) | |
d6d3f033 RX |
603 | { |
604 | struct gcov_ctr_summary *cs_prg, *cs_tprg; | |
d6d3f033 | 605 | unsigned t_ix; |
867c8b03 JH |
606 | #if !GCOV_LOCKED |
607 | /* summary for all instances of program. */ | |
608 | struct gcov_ctr_summary *cs_all; | |
609 | #endif | |
d6d3f033 RX |
610 | |
611 | /* Merge the summaries. */ | |
612 | for (t_ix = 0; t_ix < GCOV_COUNTERS_SUMMABLE; t_ix++) | |
613 | { | |
614 | cs_prg = &(prg->ctrs[t_ix]); | |
2c973ee7 | 615 | cs_tprg = &(this_prg->ctrs[t_ix]); |
d6d3f033 RX |
616 | |
617 | if (gi_ptr->merge[t_ix]) | |
618 | { | |
867c8b03 JH |
619 | int first = !cs_prg->runs; |
620 | ||
19926161 | 621 | if (!run_counted) |
867c8b03 | 622 | cs_prg->runs++; |
867c8b03 | 623 | if (first) |
d6d3f033 RX |
624 | cs_prg->num = cs_tprg->num; |
625 | cs_prg->sum_all += cs_tprg->sum_all; | |
626 | if (cs_prg->run_max < cs_tprg->run_max) | |
627 | cs_prg->run_max = cs_tprg->run_max; | |
628 | cs_prg->sum_max += cs_tprg->run_max; | |
867c8b03 | 629 | if (first) |
d6d3f033 RX |
630 | memcpy (cs_prg->histogram, cs_tprg->histogram, |
631 | sizeof (gcov_bucket_type) * GCOV_HISTOGRAM_SIZE); | |
632 | else | |
633 | gcov_histogram_merge (cs_prg->histogram, cs_tprg->histogram); | |
634 | } | |
635 | else if (cs_prg->runs) | |
636 | { | |
637 | gcov_error ("profiling:%s:Merge mismatch for summary.\n", | |
6dc33097 | 638 | filename); |
d6d3f033 RX |
639 | return -1; |
640 | } | |
d6d3f033 | 641 | #if !GCOV_LOCKED |
867c8b03 | 642 | cs_all = &all_prg->ctrs[t_ix]; |
d6d3f033 RX |
643 | if (!cs_all->runs && cs_prg->runs) |
644 | { | |
645 | cs_all->num = cs_prg->num; | |
646 | cs_all->runs = cs_prg->runs; | |
647 | cs_all->sum_all = cs_prg->sum_all; | |
648 | cs_all->run_max = cs_prg->run_max; | |
649 | cs_all->sum_max = cs_prg->sum_max; | |
650 | } | |
867c8b03 | 651 | else if (!all_prg->checksum |
d6d3f033 RX |
652 | /* Don't compare the histograms, which may have slight |
653 | variations depending on the order they were updated | |
654 | due to the truncating integer divides used in the | |
655 | merge. */ | |
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 | { | |
662 | gcov_error ("profiling:%s:Data file mismatch - some " | |
663 | "data files may have been concurrently " | |
6dc33097 | 664 | "updated without locking support\n", filename); |
867c8b03 | 665 | all_prg->checksum = ~0u; |
d6d3f033 RX |
666 | } |
667 | #endif | |
668 | } | |
40d6b753 | 669 | |
d6d3f033 RX |
670 | prg->checksum = crc32; |
671 | ||
672 | return 0; | |
673 | } | |
674 | ||
afe0c5ee RX |
675 | |
676 | /* Sort N entries in VALUE_ARRAY in descending order. | |
677 | Each entry in VALUE_ARRAY has two values. The sorting | |
678 | is based on the second value. */ | |
679 | ||
680 | GCOV_LINKAGE void | |
681 | gcov_sort_n_vals (gcov_type *value_array, int n) | |
682 | { | |
683 | int j, k; | |
684 | ||
685 | for (j = 2; j < n; j += 2) | |
686 | { | |
687 | gcov_type cur_ent[2]; | |
688 | ||
689 | cur_ent[0] = value_array[j]; | |
690 | cur_ent[1] = value_array[j + 1]; | |
691 | k = j - 2; | |
692 | while (k >= 0 && value_array[k + 1] < cur_ent[1]) | |
693 | { | |
694 | value_array[k + 2] = value_array[k]; | |
695 | value_array[k + 3] = value_array[k+1]; | |
696 | k -= 2; | |
697 | } | |
698 | value_array[k + 2] = cur_ent[0]; | |
699 | value_array[k + 3] = cur_ent[1]; | |
700 | } | |
701 | } | |
702 | ||
703 | /* Sort the profile counters for all indirect call sites. Counters | |
704 | for each call site are allocated in array COUNTERS. */ | |
705 | ||
706 | static void | |
707 | gcov_sort_icall_topn_counter (const struct gcov_ctr_info *counters) | |
708 | { | |
709 | int i; | |
710 | gcov_type *values; | |
711 | int n = counters->num; | |
712 | ||
713 | gcc_assert (!(n % GCOV_ICALL_TOPN_NCOUNTS)); | |
714 | values = counters->values; | |
715 | ||
716 | for (i = 0; i < n; i += GCOV_ICALL_TOPN_NCOUNTS) | |
717 | { | |
718 | gcov_type *value_array = &values[i + 1]; | |
719 | gcov_sort_n_vals (value_array, GCOV_ICALL_TOPN_NCOUNTS - 1); | |
720 | } | |
721 | } | |
722 | ||
723 | /* Sort topn indirect_call profile counters in GI_PTR. */ | |
724 | ||
725 | static void | |
726 | gcov_sort_topn_counter_arrays (const struct gcov_info *gi_ptr) | |
727 | { | |
728 | unsigned int i; | |
729 | int f_ix; | |
730 | const struct gcov_fn_info *gfi_ptr; | |
731 | const struct gcov_ctr_info *ci_ptr; | |
732 | ||
733 | if (!gi_ptr->merge[GCOV_COUNTER_ICALL_TOPNV]) | |
734 | return; | |
735 | ||
736 | for (f_ix = 0; (unsigned)f_ix != gi_ptr->n_functions; f_ix++) | |
737 | { | |
738 | gfi_ptr = gi_ptr->functions[f_ix]; | |
739 | ci_ptr = gfi_ptr->ctrs; | |
740 | for (i = 0; i < GCOV_COUNTERS; i++) | |
741 | { | |
742 | if (!gi_ptr->merge[i]) | |
743 | continue; | |
744 | if (i == GCOV_COUNTER_ICALL_TOPNV) | |
745 | { | |
746 | gcov_sort_icall_topn_counter (ci_ptr); | |
747 | break; | |
748 | } | |
749 | ci_ptr++; | |
750 | } | |
751 | } | |
752 | } | |
753 | ||
d6d3f033 RX |
754 | /* Dump the coverage counts for one gcov_info object. We merge with existing |
755 | counts when possible, to avoid growing the .da files ad infinitum. We use | |
756 | this program's checksum to make sure we only accumulate whole program | |
757 | statistics to the correct summary. An object file might be embedded | |
758 | in two separate programs, and we must keep the two program | |
759 | summaries separate. */ | |
760 | ||
761 | static void | |
19926161 NS |
762 | dump_one_gcov (struct gcov_info *gi_ptr, struct gcov_filename *gf, |
763 | unsigned run_counted, | |
764 | gcov_unsigned_t crc32, struct gcov_summary *all_prg, | |
765 | struct gcov_summary *this_prg) | |
d6d3f033 RX |
766 | { |
767 | struct gcov_summary prg; /* summary for this object over all program. */ | |
768 | int error; | |
769 | gcov_unsigned_t tag; | |
770 | gcov_position_t summary_pos = 0; | |
771 | gcov_position_t eof_pos = 0; | |
772 | ||
773 | fn_buffer = 0; | |
774 | sum_buffer = 0; | |
775 | ||
afe0c5ee RX |
776 | gcov_sort_topn_counter_arrays (gi_ptr); |
777 | ||
d6d3f033 RX |
778 | error = gcov_exit_open_gcda_file (gi_ptr, gf); |
779 | if (error == -1) | |
780 | return; | |
781 | ||
782 | tag = gcov_read_unsigned (); | |
783 | if (tag) | |
784 | { | |
785 | /* Merge data from file. */ | |
786 | if (tag != GCOV_DATA_MAGIC) | |
787 | { | |
6dc33097 | 788 | gcov_error ("profiling:%s:Not a gcov data file\n", gf->filename); |
d6d3f033 RX |
789 | goto read_fatal; |
790 | } | |
19926161 NS |
791 | error = merge_one_data (gf->filename, gi_ptr, &prg, this_prg, |
792 | &summary_pos, &eof_pos, crc32); | |
d6d3f033 RX |
793 | if (error == -1) |
794 | goto read_fatal; | |
795 | } | |
796 | ||
797 | gcov_rewrite (); | |
798 | ||
799 | if (!summary_pos) | |
800 | { | |
801 | memset (&prg, 0, sizeof (prg)); | |
802 | summary_pos = eof_pos; | |
803 | } | |
804 | ||
19926161 NS |
805 | error = merge_summary (gf->filename, run_counted, gi_ptr, &prg, this_prg, |
806 | crc32, all_prg); | |
d6d3f033 RX |
807 | if (error == -1) |
808 | goto read_fatal; | |
809 | ||
19926161 | 810 | write_one_data (gi_ptr, &prg, eof_pos, summary_pos); |
d6d3f033 RX |
811 | /* fall through */ |
812 | ||
813 | read_fatal:; | |
814 | while (fn_buffer) | |
815 | fn_buffer = free_fn_data (gi_ptr, fn_buffer, GCOV_COUNTERS); | |
816 | ||
817 | if ((error = gcov_close ())) | |
818 | gcov_error (error < 0 ? | |
819 | "profiling:%s:Overflow writing\n" : | |
820 | "profiling:%s:Error writing\n", | |
6dc33097 | 821 | gf->filename); |
d6d3f033 RX |
822 | } |
823 | ||
824 | ||
825 | /* Dump all the coverage counts for the program. It first computes program | |
826 | summary and then traverses gcov_list list and dumps the gcov_info | |
827 | objects one by one. */ | |
828 | ||
4303c581 NS |
829 | #if !IN_GCOV_TOOL |
830 | static | |
831 | #endif | |
832 | void | |
19926161 | 833 | gcov_do_dump (struct gcov_info *list, int run_counted) |
d6d3f033 RX |
834 | { |
835 | struct gcov_info *gi_ptr; | |
6dc33097 | 836 | struct gcov_filename gf; |
867c8b03 JH |
837 | gcov_unsigned_t crc32; |
838 | struct gcov_summary all_prg; | |
2c973ee7 | 839 | struct gcov_summary this_prg; |
d6d3f033 | 840 | |
19926161 | 841 | crc32 = compute_summary (list, &this_prg, &gf.max_length); |
d6d3f033 RX |
842 | |
843 | allocate_filename_struct (&gf); | |
867c8b03 JH |
844 | #if !GCOV_LOCKED |
845 | memset (&all_prg, 0, sizeof (all_prg)); | |
846 | #endif | |
d6d3f033 RX |
847 | |
848 | /* Now merge each file. */ | |
19926161 NS |
849 | for (gi_ptr = list; gi_ptr; gi_ptr = gi_ptr->next) |
850 | dump_one_gcov (gi_ptr, &gf, run_counted, crc32, &all_prg, &this_prg); | |
d6d3f033 | 851 | |
6dc33097 | 852 | free (gf.filename); |
d6d3f033 RX |
853 | } |
854 | ||
63971184 ML |
855 | #if IN_GCOV_TOOL |
856 | const char * | |
857 | __attribute__ ((unused)) | |
858 | gcov_get_filename (struct gcov_info *list) | |
859 | { | |
860 | return list->filename; | |
861 | } | |
862 | #endif | |
863 | ||
b98a872b | 864 | #if !IN_GCOV_TOOL |
19926161 | 865 | void |
4303c581 | 866 | __gcov_dump_one (struct gcov_root *root) |
19926161 | 867 | { |
4303c581 | 868 | if (root->dumped) |
19926161 NS |
869 | return; |
870 | ||
4303c581 | 871 | gcov_do_dump (root->list, root->run_counted); |
19926161 | 872 | |
4303c581 NS |
873 | root->dumped = 1; |
874 | root->run_counted = 1; | |
19926161 NS |
875 | } |
876 | ||
cadb2b96 | 877 | /* Per-dynamic-object gcov state. */ |
4303c581 | 878 | struct gcov_root __gcov_root; |
d6d3f033 | 879 | |
cadb2b96 NS |
880 | /* Exactly one of these will be live in the process image. */ |
881 | struct gcov_master __gcov_master = | |
882 | {GCOV_VERSION, 0}; | |
883 | ||
8c9434c2 ML |
884 | void |
885 | __gcov_exit (void) | |
d6d3f033 | 886 | { |
4303c581 | 887 | __gcov_dump_one (&__gcov_root); |
cadb2b96 NS |
888 | if (__gcov_root.next) |
889 | __gcov_root.next->prev = __gcov_root.prev; | |
890 | if (__gcov_root.prev) | |
891 | __gcov_root.prev->next = __gcov_root.next; | |
892 | else | |
893 | __gcov_master.root = __gcov_root.next; | |
8aa5bdd6 AC |
894 | |
895 | gcov_error_exit (); | |
d6d3f033 RX |
896 | } |
897 | ||
898 | /* Add a new object file onto the bb chain. Invoked automatically | |
899 | when running an object file's global ctors. */ | |
900 | ||
901 | void | |
902 | __gcov_init (struct gcov_info *info) | |
903 | { | |
904 | if (!info->version || !info->n_functions) | |
905 | return; | |
906 | if (gcov_version (info, info->version, 0)) | |
907 | { | |
4303c581 | 908 | if (!__gcov_root.list) |
cadb2b96 NS |
909 | { |
910 | /* Add to master list and at exit function. */ | |
911 | if (gcov_version (NULL, __gcov_master.version, "<master>")) | |
912 | { | |
913 | __gcov_root.next = __gcov_master.root; | |
914 | if (__gcov_master.root) | |
915 | __gcov_master.root->prev = &__gcov_root; | |
916 | __gcov_master.root = &__gcov_root; | |
917 | } | |
cadb2b96 | 918 | } |
d6d3f033 | 919 | |
4303c581 NS |
920 | info->next = __gcov_root.list; |
921 | __gcov_root.list = info; | |
d6d3f033 | 922 | } |
d6d3f033 | 923 | } |
b98a872b | 924 | #endif /* !IN_GCOV_TOOL */ |
d6d3f033 RX |
925 | #endif /* L_gcov */ |
926 | #endif /* inhibit_libc */ |