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Commit | Line | Data |
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23af32e6 NS |
1 | /* Routines required for instrumenting a program. */ |
2 | /* Compile this one with gcc. */ | |
3 | /* Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, | |
d652f226 | 4 | 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009, 2010 |
66647d44 | 5 | Free Software Foundation, Inc. |
23af32e6 NS |
6 | |
7 | This file is part of GCC. | |
8 | ||
9 | GCC is free software; you can redistribute it and/or modify it under | |
10 | the terms of the GNU General Public License as published by the Free | |
748086b7 | 11 | Software Foundation; either version 3, or (at your option) any later |
23af32e6 NS |
12 | version. |
13 | ||
23af32e6 NS |
14 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
15 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
16 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
17 | for more details. | |
18 | ||
748086b7 JJ |
19 | Under Section 7 of GPL version 3, you are granted additional |
20 | permissions described in the GCC Runtime Library Exception, version | |
21 | 3.1, as published by the Free Software Foundation. | |
22 | ||
23 | You should have received a copy of the GNU General Public License and | |
24 | a copy of the GCC Runtime Library Exception along with this program; | |
25 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
26 | <http://www.gnu.org/licenses/>. */ | |
23af32e6 | 27 | |
23af32e6 NS |
28 | #include "tconfig.h" |
29 | #include "tsystem.h" | |
30 | #include "coretypes.h" | |
31 | #include "tm.h" | |
32 | ||
474f141e NS |
33 | #if defined(inhibit_libc) |
34 | #define IN_LIBGCOV (-1) | |
35 | #else | |
23af32e6 NS |
36 | #undef NULL /* Avoid errors if stdio.h and our stddef.h mismatch. */ |
37 | #include <stdio.h> | |
474f141e NS |
38 | #define IN_LIBGCOV 1 |
39 | #if defined(L_gcov) | |
40 | #define GCOV_LINKAGE /* nothing */ | |
41 | #endif | |
42 | #endif | |
43 | #include "gcov-io.h" | |
44 | ||
45 | #if defined(inhibit_libc) | |
46 | /* If libc and its header files are not available, provide dummy functions. */ | |
47 | ||
48 | #ifdef L_gcov | |
49 | void __gcov_init (struct gcov_info *p __attribute__ ((unused))) {} | |
50 | void __gcov_flush (void) {} | |
51 | #endif | |
52 | ||
53 | #ifdef L_gcov_merge_add | |
54 | void __gcov_merge_add (gcov_type *counters __attribute__ ((unused)), | |
55 | unsigned n_counters __attribute__ ((unused))) {} | |
56 | #endif | |
57 | ||
af166e5d ZD |
58 | #ifdef L_gcov_merge_single |
59 | void __gcov_merge_single (gcov_type *counters __attribute__ ((unused)), | |
60 | unsigned n_counters __attribute__ ((unused))) {} | |
61 | #endif | |
62 | ||
63 | #ifdef L_gcov_merge_delta | |
64 | void __gcov_merge_delta (gcov_type *counters __attribute__ ((unused)), | |
65 | unsigned n_counters __attribute__ ((unused))) {} | |
66 | #endif | |
67 | ||
474f141e | 68 | #else |
23af32e6 | 69 | |
23af32e6 | 70 | #include <string.h> |
474f141e | 71 | #if GCOV_LOCKED |
23af32e6 NS |
72 | #include <fcntl.h> |
73 | #include <errno.h> | |
c2cd64b5 | 74 | #include <sys/stat.h> |
23af32e6 | 75 | #endif |
09780dfb ZD |
76 | |
77 | #ifdef L_gcov | |
ca29da43 | 78 | #include "gcov-io.c" |
23af32e6 NS |
79 | |
80 | /* Chain of per-object gcov structures. */ | |
81 | static struct gcov_info *gcov_list; | |
82 | ||
83 | /* A program checksum allows us to distinguish program data for an | |
84 | object file included in multiple programs. */ | |
9b514d25 | 85 | static gcov_unsigned_t gcov_crc32; |
23af32e6 | 86 | |
992f396f GZ |
87 | /* Size of the longest file name. */ |
88 | static size_t gcov_max_filename = 0; | |
89 | ||
b8698a0f L |
90 | /* Make sure path component of the given FILENAME exists, create |
91 | missing directories. FILENAME must be writable. | |
992f396f GZ |
92 | Returns zero on success, or -1 if an error occurred. */ |
93 | ||
160e2e4f | 94 | static int |
992f396f GZ |
95 | create_file_directory (char *filename) |
96 | { | |
78e7dd6a KT |
97 | #if !defined(TARGET_POSIX_IO) && !defined(_WIN32) |
98 | (void) filename; | |
99 | return -1; | |
100 | #else | |
992f396f GZ |
101 | char *s; |
102 | ||
78e7dd6a KT |
103 | s = filename; |
104 | ||
105 | if (HAS_DRIVE_SPEC(s)) | |
106 | s += 2; | |
107 | if (IS_DIR_SEPARATOR(*s)) | |
108 | ++s; | |
109 | for (; *s != '\0'; s++) | |
992f396f GZ |
110 | if (IS_DIR_SEPARATOR(*s)) |
111 | { | |
112 | char sep = *s; | |
113 | *s = '\0'; | |
114 | ||
115 | /* Try to make directory if it doesn't already exist. */ | |
116 | if (access (filename, F_OK) == -1 | |
78e7dd6a | 117 | #ifdef TARGET_POSIX_IO |
992f396f | 118 | && mkdir (filename, 0755) == -1 |
78e7dd6a KT |
119 | #else |
120 | && mkdir (filename) == -1 | |
121 | #endif | |
992f396f GZ |
122 | /* The directory might have been made by another process. */ |
123 | && errno != EEXIST) | |
124 | { | |
125 | fprintf (stderr, "profiling:%s:Cannot create directory\n", | |
126 | filename); | |
127 | *s = sep; | |
128 | return -1; | |
129 | }; | |
b8698a0f | 130 | |
992f396f GZ |
131 | *s = sep; |
132 | }; | |
133 | return 0; | |
4969c0d8 | 134 | #endif |
78e7dd6a | 135 | } |
992f396f GZ |
136 | |
137 | /* Check if VERSION of the info block PTR matches libgcov one. | |
138 | Return 1 on success, or zero in case of versions mismatch. | |
b8698a0f | 139 | If FILENAME is not NULL, its value used for reporting purposes |
992f396f | 140 | instead of value from the info block. */ |
b8698a0f | 141 | |
992f396f GZ |
142 | static int |
143 | gcov_version (struct gcov_info *ptr, gcov_unsigned_t version, | |
144 | const char *filename) | |
23af32e6 | 145 | { |
160e2e4f | 146 | if (version != GCOV_VERSION) |
23af32e6 | 147 | { |
330d2e2a NS |
148 | char v[4], e[4]; |
149 | ||
150 | GCOV_UNSIGNED2STRING (v, version); | |
151 | GCOV_UNSIGNED2STRING (e, GCOV_VERSION); | |
b8698a0f | 152 | |
160e2e4f NS |
153 | fprintf (stderr, |
154 | "profiling:%s:Version mismatch - expected %.4s got %.4s\n", | |
992f396f | 155 | filename? filename : ptr->filename, e, v); |
160e2e4f | 156 | return 0; |
23af32e6 | 157 | } |
160e2e4f | 158 | return 1; |
23af32e6 NS |
159 | } |
160 | ||
161 | /* Dump the coverage counts. We merge with existing counts when | |
162 | possible, to avoid growing the .da files ad infinitum. We use this | |
163 | program's checksum to make sure we only accumulate whole program | |
164 | statistics to the correct summary. An object file might be embedded | |
165 | in two separate programs, and we must keep the two program | |
166 | summaries separate. */ | |
167 | ||
168 | static void | |
169 | gcov_exit (void) | |
170 | { | |
cdb23767 NS |
171 | struct gcov_info *gi_ptr; |
172 | struct gcov_summary this_program; | |
173 | struct gcov_summary all; | |
50612a04 ZD |
174 | struct gcov_ctr_summary *cs_ptr; |
175 | const struct gcov_ctr_info *ci_ptr; | |
176 | unsigned t_ix; | |
177 | gcov_unsigned_t c_num; | |
992f396f GZ |
178 | const char *gcov_prefix; |
179 | int gcov_prefix_strip = 0; | |
180 | size_t prefix_length; | |
181 | char *gi_filename, *gi_filename_up; | |
cdb23767 NS |
182 | |
183 | memset (&all, 0, sizeof (all)); | |
184 | /* Find the totals for this execution. */ | |
185 | memset (&this_program, 0, sizeof (this_program)); | |
186 | for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next) | |
d101590b | 187 | { |
50612a04 ZD |
188 | ci_ptr = gi_ptr->counts; |
189 | for (t_ix = 0; t_ix < GCOV_COUNTERS_SUMMABLE; t_ix++) | |
190 | { | |
191 | if (!((1 << t_ix) & gi_ptr->ctr_mask)) | |
192 | continue; | |
193 | ||
194 | cs_ptr = &this_program.ctrs[t_ix]; | |
195 | cs_ptr->num += ci_ptr->num; | |
196 | for (c_num = 0; c_num < ci_ptr->num; c_num++) | |
197 | { | |
198 | cs_ptr->sum_all += ci_ptr->values[c_num]; | |
199 | if (cs_ptr->run_max < ci_ptr->values[c_num]) | |
200 | cs_ptr->run_max = ci_ptr->values[c_num]; | |
201 | } | |
202 | ci_ptr++; | |
203 | } | |
d101590b | 204 | } |
cdb23767 | 205 | |
78e7dd6a KT |
206 | { |
207 | /* Check if the level of dirs to strip off specified. */ | |
208 | char *tmp = getenv("GCOV_PREFIX_STRIP"); | |
209 | if (tmp) | |
210 | { | |
211 | gcov_prefix_strip = atoi (tmp); | |
212 | /* Do not consider negative values. */ | |
213 | if (gcov_prefix_strip < 0) | |
214 | gcov_prefix_strip = 0; | |
215 | } | |
216 | } | |
992f396f GZ |
217 | /* Get file name relocation prefix. Non-absolute values are ignored. */ |
218 | gcov_prefix = getenv("GCOV_PREFIX"); | |
78e7dd6a | 219 | if (gcov_prefix) |
992f396f | 220 | { |
992f396f GZ |
221 | prefix_length = strlen(gcov_prefix); |
222 | ||
9d6aab7e | 223 | /* Remove an unnecessary trailing '/' */ |
992f396f GZ |
224 | if (IS_DIR_SEPARATOR (gcov_prefix[prefix_length - 1])) |
225 | prefix_length--; | |
226 | } | |
3ca48b3e L |
227 | else |
228 | prefix_length = 0; | |
b8698a0f | 229 | |
78e7dd6a KT |
230 | /* If no prefix was specified and a prefix stip, then we assume |
231 | relative. */ | |
232 | if (gcov_prefix_strip != 0 && prefix_length == 0) | |
233 | { | |
234 | gcov_prefix = "."; | |
235 | prefix_length = 1; | |
236 | } | |
237 | /* Allocate and initialize the filename scratch space plus one. */ | |
238 | gi_filename = (char *) alloca (prefix_length + gcov_max_filename + 2); | |
992f396f GZ |
239 | if (prefix_length) |
240 | memcpy (gi_filename, gcov_prefix, prefix_length); | |
241 | gi_filename_up = gi_filename + prefix_length; | |
b8698a0f | 242 | |
f9da5064 | 243 | /* Now merge each file. */ |
cdb23767 | 244 | for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next) |
23af32e6 | 245 | { |
cdb23767 NS |
246 | struct gcov_summary this_object; |
247 | struct gcov_summary object, program; | |
248 | gcov_type *values[GCOV_COUNTERS]; | |
249 | const struct gcov_fn_info *fi_ptr; | |
250 | unsigned fi_stride; | |
50612a04 | 251 | unsigned c_ix, f_ix, n_counts; |
cdb23767 | 252 | struct gcov_ctr_summary *cs_obj, *cs_tobj, *cs_prg, *cs_tprg, *cs_all; |
7d63a2fa | 253 | int error = 0; |
9b514d25 | 254 | gcov_unsigned_t tag, length; |
7d63a2fa | 255 | gcov_position_t summary_pos = 0; |
00cf2913 | 256 | gcov_position_t eof_pos = 0; |
78e7dd6a KT |
257 | const char *fname, *s; |
258 | ||
259 | fname = gi_ptr->filename; | |
cdb23767 | 260 | |
cdb23767 | 261 | memset (&this_object, 0, sizeof (this_object)); |
dd486eb2 | 262 | memset (&object, 0, sizeof (object)); |
b8698a0f | 263 | |
78e7dd6a KT |
264 | /* Avoid to add multiple drive letters into combined path. */ |
265 | if (prefix_length != 0 && HAS_DRIVE_SPEC(fname)) | |
266 | fname += 2; | |
267 | ||
b8698a0f | 268 | /* Build relocated filename, stripping off leading |
992f396f GZ |
269 | directories from the initial filename if requested. */ |
270 | if (gcov_prefix_strip > 0) | |
271 | { | |
272 | int level = 0; | |
78e7dd6a KT |
273 | s = fname; |
274 | if (IS_DIR_SEPARATOR(*s)) | |
275 | ++s; | |
992f396f GZ |
276 | |
277 | /* Skip selected directory levels. */ | |
78e7dd6a | 278 | for (; (*s != '\0') && (level < gcov_prefix_strip); s++) |
992f396f GZ |
279 | if (IS_DIR_SEPARATOR(*s)) |
280 | { | |
281 | fname = s; | |
282 | level++; | |
78e7dd6a | 283 | } |
992f396f | 284 | } |
78e7dd6a | 285 | /* Update complete filename with stripped original. */ |
9f47a24e MT |
286 | if (prefix_length != 0 && !IS_DIR_SEPARATOR (*fname)) |
287 | { | |
288 | /* If prefix is given, add directory separator. */ | |
78e7dd6a KT |
289 | strcpy (gi_filename_up, "/"); |
290 | strcpy (gi_filename_up + 1, fname); | |
291 | } | |
992f396f | 292 | else |
78e7dd6a | 293 | strcpy (gi_filename_up, fname); |
992f396f | 294 | |
dd486eb2 | 295 | /* Totals for this object file. */ |
50612a04 ZD |
296 | ci_ptr = gi_ptr->counts; |
297 | for (t_ix = 0; t_ix < GCOV_COUNTERS_SUMMABLE; t_ix++) | |
298 | { | |
299 | if (!((1 << t_ix) & gi_ptr->ctr_mask)) | |
300 | continue; | |
301 | ||
43ac2623 | 302 | cs_ptr = &this_object.ctrs[t_ix]; |
50612a04 ZD |
303 | cs_ptr->num += ci_ptr->num; |
304 | for (c_num = 0; c_num < ci_ptr->num; c_num++) | |
305 | { | |
306 | cs_ptr->sum_all += ci_ptr->values[c_num]; | |
307 | if (cs_ptr->run_max < ci_ptr->values[c_num]) | |
308 | cs_ptr->run_max = ci_ptr->values[c_num]; | |
309 | } | |
310 | ||
311 | ci_ptr++; | |
312 | } | |
313 | ||
314 | c_ix = 0; | |
315 | for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++) | |
cdb23767 NS |
316 | if ((1 << t_ix) & gi_ptr->ctr_mask) |
317 | { | |
50612a04 | 318 | values[c_ix] = gi_ptr->counts[c_ix].values; |
cdb23767 | 319 | c_ix++; |
cdb23767 NS |
320 | } |
321 | ||
322 | /* Calculate the function_info stride. This depends on the | |
323 | number of counter types being measured. */ | |
324 | fi_stride = sizeof (struct gcov_fn_info) + c_ix * sizeof (unsigned); | |
325 | if (__alignof__ (struct gcov_fn_info) > sizeof (unsigned)) | |
cb9e4555 | 326 | { |
cdb23767 NS |
327 | fi_stride += __alignof__ (struct gcov_fn_info) - 1; |
328 | fi_stride &= ~(__alignof__ (struct gcov_fn_info) - 1); | |
cb9e4555 | 329 | } |
b8698a0f | 330 | |
992f396f | 331 | if (!gcov_open (gi_filename)) |
23af32e6 | 332 | { |
992f396f GZ |
333 | /* Open failed likely due to missed directory. |
334 | Create directory and retry to open file. */ | |
335 | if (create_file_directory (gi_filename)) | |
336 | { | |
337 | fprintf (stderr, "profiling:%s:Skip\n", gi_filename); | |
338 | continue; | |
339 | } | |
340 | if (!gcov_open (gi_filename)) | |
341 | { | |
342 | fprintf (stderr, "profiling:%s:Cannot open\n", gi_filename); | |
343 | continue; | |
344 | } | |
23af32e6 | 345 | } |
160e2e4f NS |
346 | |
347 | tag = gcov_read_unsigned (); | |
348 | if (tag) | |
23af32e6 NS |
349 | { |
350 | /* Merge data from file. */ | |
160e2e4f | 351 | if (tag != GCOV_DATA_MAGIC) |
23af32e6 NS |
352 | { |
353 | fprintf (stderr, "profiling:%s:Not a gcov data file\n", | |
992f396f | 354 | gi_filename); |
00cf2913 | 355 | goto read_fatal; |
23af32e6 | 356 | } |
94de45d9 | 357 | length = gcov_read_unsigned (); |
992f396f | 358 | if (!gcov_version (gi_ptr, length, gi_filename)) |
160e2e4f | 359 | goto read_fatal; |
dd486eb2 NS |
360 | |
361 | length = gcov_read_unsigned (); | |
362 | if (length != gi_ptr->stamp) | |
00cf2913 NS |
363 | /* Read from a different compilation. Overwrite the file. */ |
364 | goto rewrite; | |
b8698a0f | 365 | |
23af32e6 | 366 | /* Merge execution counts for each function. */ |
50612a04 | 367 | for (f_ix = 0; f_ix < gi_ptr->n_functions; f_ix++) |
23af32e6 | 368 | { |
50612a04 ZD |
369 | fi_ptr = (const struct gcov_fn_info *) |
370 | ((const char *) gi_ptr->functions + f_ix * fi_stride); | |
94de45d9 NS |
371 | tag = gcov_read_unsigned (); |
372 | length = gcov_read_unsigned (); | |
23af32e6 | 373 | |
f9da5064 | 374 | /* Check function. */ |
796621e8 | 375 | if (tag != GCOV_TAG_FUNCTION |
10adac51 | 376 | || length != GCOV_TAG_FUNCTION_LENGTH |
796621e8 | 377 | || gcov_read_unsigned () != fi_ptr->ident |
10adac51 XDL |
378 | || gcov_read_unsigned () != fi_ptr->lineno_checksum |
379 | || gcov_read_unsigned () != fi_ptr->cfg_checksum) | |
23af32e6 NS |
380 | { |
381 | read_mismatch:; | |
cdb23767 | 382 | fprintf (stderr, "profiling:%s:Merge mismatch for %s\n", |
992f396f | 383 | gi_filename, |
796621e8 | 384 | f_ix + 1 ? "function" : "summaries"); |
23af32e6 NS |
385 | goto read_fatal; |
386 | } | |
cb9e4555 | 387 | |
50612a04 ZD |
388 | c_ix = 0; |
389 | for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++) | |
390 | { | |
391 | gcov_merge_fn merge; | |
392 | ||
393 | if (!((1 << t_ix) & gi_ptr->ctr_mask)) | |
394 | continue; | |
b8698a0f | 395 | |
50612a04 ZD |
396 | n_counts = fi_ptr->n_ctrs[c_ix]; |
397 | merge = gi_ptr->counts[c_ix].merge; | |
b8698a0f | 398 | |
50612a04 ZD |
399 | tag = gcov_read_unsigned (); |
400 | length = gcov_read_unsigned (); | |
401 | if (tag != GCOV_TAG_FOR_COUNTER (t_ix) | |
402 | || length != GCOV_TAG_COUNTER_LENGTH (n_counts)) | |
403 | goto read_mismatch; | |
404 | (*merge) (values[c_ix], n_counts); | |
405 | values[c_ix] += n_counts; | |
406 | c_ix++; | |
cb9e4555 | 407 | } |
94de45d9 NS |
408 | if ((error = gcov_is_error ())) |
409 | goto read_error; | |
23af32e6 NS |
410 | } |
411 | ||
50612a04 | 412 | f_ix = ~0u; |
474f141e | 413 | /* Check program & object summary */ |
7d63a2fa | 414 | while (1) |
23af32e6 | 415 | { |
474f141e | 416 | int is_program; |
b8698a0f | 417 | |
00cf2913 | 418 | eof_pos = gcov_position (); |
94de45d9 | 419 | tag = gcov_read_unsigned (); |
7d63a2fa NS |
420 | if (!tag) |
421 | break; | |
00cf2913 | 422 | |
474f141e NS |
423 | length = gcov_read_unsigned (); |
424 | is_program = tag == GCOV_TAG_PROGRAM_SUMMARY; | |
425 | if (length != GCOV_TAG_SUMMARY_LENGTH | |
426 | || (!is_program && tag != GCOV_TAG_OBJECT_SUMMARY)) | |
23af32e6 | 427 | goto read_mismatch; |
474f141e | 428 | gcov_read_summary (is_program ? &program : &object); |
94de45d9 | 429 | if ((error = gcov_is_error ())) |
7d63a2fa NS |
430 | goto read_error; |
431 | if (is_program && program.checksum == gcov_crc32) | |
94de45d9 | 432 | { |
00cf2913 | 433 | summary_pos = eof_pos; |
7d63a2fa | 434 | goto rewrite; |
94de45d9 | 435 | } |
23af32e6 | 436 | } |
23af32e6 | 437 | } |
00cf2913 | 438 | goto rewrite; |
b8698a0f | 439 | |
00cf2913 NS |
440 | read_error:; |
441 | fprintf (stderr, error < 0 ? "profiling:%s:Overflow merging\n" | |
992f396f | 442 | : "profiling:%s:Error merging\n", gi_filename); |
b8698a0f | 443 | |
00cf2913 NS |
444 | read_fatal:; |
445 | gcov_close (); | |
446 | continue; | |
447 | ||
160e2e4f NS |
448 | rewrite:; |
449 | gcov_rewrite (); | |
7d63a2fa | 450 | if (!summary_pos) |
cdb23767 | 451 | memset (&program, 0, sizeof (program)); |
23af32e6 | 452 | |
cdb23767 | 453 | /* Merge the summaries. */ |
796621e8 | 454 | f_ix = ~0u; |
50612a04 | 455 | for (t_ix = 0; t_ix < GCOV_COUNTERS_SUMMABLE; t_ix++) |
cdb23767 | 456 | { |
50612a04 ZD |
457 | cs_obj = &object.ctrs[t_ix]; |
458 | cs_tobj = &this_object.ctrs[t_ix]; | |
459 | cs_prg = &program.ctrs[t_ix]; | |
43ac2623 | 460 | cs_tprg = &this_program.ctrs[t_ix]; |
50612a04 ZD |
461 | cs_all = &all.ctrs[t_ix]; |
462 | ||
cdb23767 NS |
463 | if ((1 << t_ix) & gi_ptr->ctr_mask) |
464 | { | |
465 | if (!cs_obj->runs++) | |
466 | cs_obj->num = cs_tobj->num; | |
467 | else if (cs_obj->num != cs_tobj->num) | |
468 | goto read_mismatch; | |
469 | cs_obj->sum_all += cs_tobj->sum_all; | |
470 | if (cs_obj->run_max < cs_tobj->run_max) | |
471 | cs_obj->run_max = cs_tobj->run_max; | |
472 | cs_obj->sum_max += cs_tobj->run_max; | |
b8698a0f | 473 | |
cdb23767 NS |
474 | if (!cs_prg->runs++) |
475 | cs_prg->num = cs_tprg->num; | |
476 | else if (cs_prg->num != cs_tprg->num) | |
477 | goto read_mismatch; | |
478 | cs_prg->sum_all += cs_tprg->sum_all; | |
479 | if (cs_prg->run_max < cs_tprg->run_max) | |
480 | cs_prg->run_max = cs_tprg->run_max; | |
481 | cs_prg->sum_max += cs_tprg->run_max; | |
cdb23767 NS |
482 | } |
483 | else if (cs_obj->num || cs_prg->num) | |
484 | goto read_mismatch; | |
b8698a0f | 485 | |
cdb23767 NS |
486 | if (!cs_all->runs && cs_prg->runs) |
487 | memcpy (cs_all, cs_prg, sizeof (*cs_all)); | |
488 | else if (!all.checksum | |
489 | && (!GCOV_LOCKED || cs_all->runs == cs_prg->runs) | |
490 | && memcmp (cs_all, cs_prg, sizeof (*cs_all))) | |
491 | { | |
492 | fprintf (stderr, "profiling:%s:Invocation mismatch - some data files may have been removed%s", | |
992f396f | 493 | gi_filename, GCOV_LOCKED |
cdb23767 NS |
494 | ? "" : " or concurrent update without locking support"); |
495 | all.checksum = ~0u; | |
496 | } | |
497 | } | |
b8698a0f | 498 | |
50612a04 ZD |
499 | c_ix = 0; |
500 | for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++) | |
501 | if ((1 << t_ix) & gi_ptr->ctr_mask) | |
502 | { | |
503 | values[c_ix] = gi_ptr->counts[c_ix].values; | |
504 | c_ix++; | |
505 | } | |
506 | ||
cdb23767 | 507 | program.checksum = gcov_crc32; |
b8698a0f | 508 | |
23af32e6 | 509 | /* Write out the data. */ |
9b514d25 | 510 | gcov_write_tag_length (GCOV_DATA_MAGIC, GCOV_VERSION); |
dd486eb2 | 511 | gcov_write_unsigned (gi_ptr->stamp); |
b8698a0f | 512 | |
23af32e6 | 513 | /* Write execution counts for each function. */ |
50612a04 | 514 | for (f_ix = 0; f_ix < gi_ptr->n_functions; f_ix++) |
23af32e6 | 515 | { |
50612a04 ZD |
516 | fi_ptr = (const struct gcov_fn_info *) |
517 | ((const char *) gi_ptr->functions + f_ix * fi_stride); | |
518 | ||
23af32e6 | 519 | /* Announce function. */ |
474f141e | 520 | gcov_write_tag_length (GCOV_TAG_FUNCTION, GCOV_TAG_FUNCTION_LENGTH); |
796621e8 | 521 | gcov_write_unsigned (fi_ptr->ident); |
10adac51 XDL |
522 | gcov_write_unsigned (fi_ptr->lineno_checksum); |
523 | gcov_write_unsigned (fi_ptr->cfg_checksum); | |
cb9e4555 | 524 | |
50612a04 ZD |
525 | c_ix = 0; |
526 | for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++) | |
527 | { | |
528 | gcov_type *c_ptr; | |
529 | ||
530 | if (!((1 << t_ix) & gi_ptr->ctr_mask)) | |
531 | continue; | |
532 | ||
533 | n_counts = fi_ptr->n_ctrs[c_ix]; | |
b8698a0f | 534 | |
50612a04 ZD |
535 | gcov_write_tag_length (GCOV_TAG_FOR_COUNTER (t_ix), |
536 | GCOV_TAG_COUNTER_LENGTH (n_counts)); | |
537 | c_ptr = values[c_ix]; | |
538 | while (n_counts--) | |
539 | gcov_write_counter (*c_ptr++); | |
540 | ||
541 | values[c_ix] = c_ptr; | |
542 | c_ix++; | |
543 | } | |
23af32e6 NS |
544 | } |
545 | ||
546 | /* Object file summary. */ | |
94de45d9 | 547 | gcov_write_summary (GCOV_TAG_OBJECT_SUMMARY, &object); |
23af32e6 | 548 | |
d101590b | 549 | /* Generate whole program statistics. */ |
00cf2913 NS |
550 | if (eof_pos) |
551 | gcov_seek (eof_pos); | |
cdb23767 | 552 | gcov_write_summary (GCOV_TAG_PROGRAM_SUMMARY, &program); |
00cf2913 NS |
553 | if (!summary_pos) |
554 | gcov_write_unsigned (0); | |
cdb23767 | 555 | if ((error = gcov_close ())) |
cdb23767 NS |
556 | fprintf (stderr, error < 0 ? |
557 | "profiling:%s:Overflow writing\n" : | |
558 | "profiling:%s:Error writing\n", | |
992f396f | 559 | gi_filename); |
23af32e6 | 560 | } |
23af32e6 NS |
561 | } |
562 | ||
563 | /* Add a new object file onto the bb chain. Invoked automatically | |
564 | when running an object file's global ctors. */ | |
565 | ||
566 | void | |
567 | __gcov_init (struct gcov_info *info) | |
568 | { | |
569 | if (!info->version) | |
570 | return; | |
992f396f | 571 | if (gcov_version (info, info->version, 0)) |
23af32e6 NS |
572 | { |
573 | const char *ptr = info->filename; | |
9b514d25 | 574 | gcov_unsigned_t crc32 = gcov_crc32; |
992f396f GZ |
575 | size_t filename_length = strlen(info->filename); |
576 | ||
577 | /* Refresh the longest file name information */ | |
578 | if (filename_length > gcov_max_filename) | |
579 | gcov_max_filename = filename_length; | |
b8698a0f | 580 | |
23af32e6 NS |
581 | do |
582 | { | |
583 | unsigned ix; | |
9b514d25 | 584 | gcov_unsigned_t value = *ptr << 24; |
23af32e6 NS |
585 | |
586 | for (ix = 8; ix--; value <<= 1) | |
587 | { | |
9b514d25 | 588 | gcov_unsigned_t feedback; |
23af32e6 NS |
589 | |
590 | feedback = (value ^ crc32) & 0x80000000 ? 0x04c11db7 : 0; | |
591 | crc32 <<= 1; | |
592 | crc32 ^= feedback; | |
593 | } | |
594 | } | |
595 | while (*ptr++); | |
b8698a0f | 596 | |
23af32e6 | 597 | gcov_crc32 = crc32; |
b8698a0f | 598 | |
23af32e6 NS |
599 | if (!gcov_list) |
600 | atexit (gcov_exit); | |
b8698a0f | 601 | |
23af32e6 NS |
602 | info->next = gcov_list; |
603 | gcov_list = info; | |
604 | } | |
605 | info->version = 0; | |
606 | } | |
607 | ||
608 | /* Called before fork or exec - write out profile information gathered so | |
609 | far and reset it to zero. This avoids duplication or loss of the | |
610 | profile information gathered so far. */ | |
611 | ||
612 | void | |
613 | __gcov_flush (void) | |
614 | { | |
cdb23767 | 615 | const struct gcov_info *gi_ptr; |
23af32e6 NS |
616 | |
617 | gcov_exit (); | |
cdb23767 | 618 | for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next) |
23af32e6 | 619 | { |
cdb23767 NS |
620 | unsigned t_ix; |
621 | const struct gcov_ctr_info *ci_ptr; | |
b8698a0f | 622 | |
cdb23767 NS |
623 | for (t_ix = 0, ci_ptr = gi_ptr->counts; t_ix != GCOV_COUNTERS; t_ix++) |
624 | if ((1 << t_ix) & gi_ptr->ctr_mask) | |
625 | { | |
626 | memset (ci_ptr->values, 0, sizeof (gcov_type) * ci_ptr->num); | |
627 | ci_ptr++; | |
628 | } | |
23af32e6 NS |
629 | } |
630 | } | |
01e60c33 | 631 | |
09780dfb ZD |
632 | #endif /* L_gcov */ |
633 | ||
634 | #ifdef L_gcov_merge_add | |
635 | /* The profile merging function that just adds the counters. It is given | |
636 | an array COUNTERS of N_COUNTERS old counters and it reads the same number | |
637 | of counters from the gcov file. */ | |
638 | void | |
9b514d25 | 639 | __gcov_merge_add (gcov_type *counters, unsigned n_counters) |
09780dfb ZD |
640 | { |
641 | for (; n_counters; counters++, n_counters--) | |
642 | *counters += gcov_read_counter (); | |
643 | } | |
644 | #endif /* L_gcov_merge_add */ | |
645 | ||
079a182e JH |
646 | #ifdef L_gcov_merge_ior |
647 | /* The profile merging function that just adds the counters. It is given | |
648 | an array COUNTERS of N_COUNTERS old counters and it reads the same number | |
649 | of counters from the gcov file. */ | |
650 | void | |
651 | __gcov_merge_ior (gcov_type *counters, unsigned n_counters) | |
652 | { | |
653 | for (; n_counters; counters++, n_counters--) | |
654 | *counters |= gcov_read_counter (); | |
655 | } | |
656 | #endif | |
657 | ||
af166e5d | 658 | #ifdef L_gcov_merge_single |
330d2e2a NS |
659 | /* The profile merging function for choosing the most common value. |
660 | It is given an array COUNTERS of N_COUNTERS old counters and it | |
661 | reads the same number of counters from the gcov file. The counters | |
662 | are split into 3-tuples where the members of the tuple have | |
663 | meanings: | |
b8698a0f | 664 | |
af166e5d ZD |
665 | -- the stored candidate on the most common value of the measured entity |
666 | -- counter | |
667 | -- total number of evaluations of the value */ | |
668 | void | |
669 | __gcov_merge_single (gcov_type *counters, unsigned n_counters) | |
670 | { | |
671 | unsigned i, n_measures; | |
672 | gcov_type value, counter, all; | |
673 | ||
cccd217d | 674 | gcc_assert (!(n_counters % 3)); |
af166e5d ZD |
675 | n_measures = n_counters / 3; |
676 | for (i = 0; i < n_measures; i++, counters += 3) | |
677 | { | |
678 | value = gcov_read_counter (); | |
679 | counter = gcov_read_counter (); | |
680 | all = gcov_read_counter (); | |
681 | ||
682 | if (counters[0] == value) | |
683 | counters[1] += counter; | |
684 | else if (counter > counters[1]) | |
685 | { | |
686 | counters[0] = value; | |
687 | counters[1] = counter - counters[1]; | |
688 | } | |
689 | else | |
690 | counters[1] -= counter; | |
691 | counters[2] += all; | |
692 | } | |
693 | } | |
694 | #endif /* L_gcov_merge_single */ | |
695 | ||
696 | #ifdef L_gcov_merge_delta | |
330d2e2a NS |
697 | /* The profile merging function for choosing the most common |
698 | difference between two consecutive evaluations of the value. It is | |
699 | given an array COUNTERS of N_COUNTERS old counters and it reads the | |
700 | same number of counters from the gcov file. The counters are split | |
701 | into 4-tuples where the members of the tuple have meanings: | |
b8698a0f | 702 | |
af166e5d ZD |
703 | -- the last value of the measured entity |
704 | -- the stored candidate on the most common difference | |
705 | -- counter | |
706 | -- total number of evaluations of the value */ | |
707 | void | |
708 | __gcov_merge_delta (gcov_type *counters, unsigned n_counters) | |
709 | { | |
710 | unsigned i, n_measures; | |
0f900dfa | 711 | gcov_type value, counter, all; |
af166e5d | 712 | |
cccd217d | 713 | gcc_assert (!(n_counters % 4)); |
af166e5d ZD |
714 | n_measures = n_counters / 4; |
715 | for (i = 0; i < n_measures; i++, counters += 4) | |
716 | { | |
0f900dfa | 717 | /* last = */ gcov_read_counter (); |
af166e5d ZD |
718 | value = gcov_read_counter (); |
719 | counter = gcov_read_counter (); | |
720 | all = gcov_read_counter (); | |
721 | ||
722 | if (counters[1] == value) | |
723 | counters[2] += counter; | |
724 | else if (counter > counters[2]) | |
725 | { | |
726 | counters[1] = value; | |
727 | counters[2] = counter - counters[2]; | |
728 | } | |
729 | else | |
730 | counters[2] -= counter; | |
731 | counters[3] += all; | |
732 | } | |
733 | } | |
734 | #endif /* L_gcov_merge_delta */ | |
735 | ||
9885da8e ZD |
736 | #ifdef L_gcov_interval_profiler |
737 | /* If VALUE is in interval <START, START + STEPS - 1>, then increases the | |
738 | corresponding counter in COUNTERS. If the VALUE is above or below | |
739 | the interval, COUNTERS[STEPS] or COUNTERS[STEPS + 1] is increased | |
740 | instead. */ | |
741 | ||
742 | void | |
743 | __gcov_interval_profiler (gcov_type *counters, gcov_type value, | |
744 | int start, unsigned steps) | |
745 | { | |
746 | gcov_type delta = value - start; | |
747 | if (delta < 0) | |
748 | counters[steps + 1]++; | |
749 | else if (delta >= steps) | |
750 | counters[steps]++; | |
751 | else | |
752 | counters[delta]++; | |
753 | } | |
754 | #endif | |
755 | ||
756 | #ifdef L_gcov_pow2_profiler | |
757 | /* If VALUE is a power of two, COUNTERS[1] is incremented. Otherwise | |
758 | COUNTERS[0] is incremented. */ | |
759 | ||
760 | void | |
761 | __gcov_pow2_profiler (gcov_type *counters, gcov_type value) | |
762 | { | |
763 | if (value & (value - 1)) | |
764 | counters[0]++; | |
765 | else | |
766 | counters[1]++; | |
767 | } | |
768 | #endif | |
769 | ||
9885da8e ZD |
770 | /* Tries to determine the most common value among its inputs. Checks if the |
771 | value stored in COUNTERS[0] matches VALUE. If this is the case, COUNTERS[1] | |
772 | is incremented. If this is not the case and COUNTERS[1] is not zero, | |
773 | COUNTERS[1] is decremented. Otherwise COUNTERS[1] is set to one and | |
774 | VALUE is stored to COUNTERS[0]. This algorithm guarantees that if this | |
775 | function is called more than 50% of the time with one value, this value | |
776 | will be in COUNTERS[0] in the end. | |
777 | ||
778 | In any case, COUNTERS[2] is incremented. */ | |
779 | ||
6bad2617 TB |
780 | static inline void |
781 | __gcov_one_value_profiler_body (gcov_type *counters, gcov_type value) | |
9885da8e ZD |
782 | { |
783 | if (value == counters[0]) | |
784 | counters[1]++; | |
785 | else if (counters[1] == 0) | |
786 | { | |
787 | counters[1] = 1; | |
788 | counters[0] = value; | |
789 | } | |
790 | else | |
791 | counters[1]--; | |
792 | counters[2]++; | |
793 | } | |
6bad2617 TB |
794 | |
795 | #ifdef L_gcov_one_value_profiler | |
796 | void | |
797 | __gcov_one_value_profiler (gcov_type *counters, gcov_type value) | |
798 | { | |
799 | __gcov_one_value_profiler_body (counters, value); | |
800 | } | |
801 | #endif | |
802 | ||
803 | #ifdef L_gcov_indirect_call_profiler | |
7894073c SE |
804 | |
805 | /* By default, the C++ compiler will use function addresses in the | |
806 | vtable entries. Setting TARGET_VTABLE_USES_DESCRIPTORS to nonzero | |
807 | tells the compiler to use function descriptors instead. The value | |
808 | of this macro says how many words wide the descriptor is (normally 2), | |
809 | but it may be dependent on target flags. Since we do not have access | |
810 | to the target flags here we just check to see if it is set and use | |
811 | that to set VTABLE_USES_DESCRIPTORS to 0 or 1. | |
812 | ||
813 | It is assumed that the address of a function descriptor may be treated | |
814 | as a pointer to a function. */ | |
815 | ||
816 | #ifdef TARGET_VTABLE_USES_DESCRIPTORS | |
817 | #define VTABLE_USES_DESCRIPTORS 1 | |
818 | #else | |
819 | #define VTABLE_USES_DESCRIPTORS 0 | |
820 | #endif | |
821 | ||
6bad2617 TB |
822 | /* Tries to determine the most common value among its inputs. */ |
823 | void | |
b8698a0f | 824 | __gcov_indirect_call_profiler (gcov_type* counter, gcov_type value, |
6bad2617 TB |
825 | void* cur_func, void* callee_func) |
826 | { | |
81a39e89 SE |
827 | /* If the C++ virtual tables contain function descriptors then one |
828 | function may have multiple descriptors and we need to dereference | |
829 | the descriptors to see if they point to the same function. */ | |
830 | if (cur_func == callee_func | |
7894073c | 831 | || (VTABLE_USES_DESCRIPTORS && callee_func |
81a39e89 | 832 | && *(void **) cur_func == *(void **) callee_func)) |
6bad2617 TB |
833 | __gcov_one_value_profiler_body (counter, value); |
834 | } | |
9885da8e ZD |
835 | #endif |
836 | ||
079a182e JH |
837 | |
838 | #ifdef L_gcov_average_profiler | |
839 | /* Increase corresponding COUNTER by VALUE. FIXME: Perhaps we want | |
840 | to saturate up. */ | |
841 | ||
842 | void | |
843 | __gcov_average_profiler (gcov_type *counters, gcov_type value) | |
844 | { | |
845 | counters[0] += value; | |
846 | counters[1] ++; | |
847 | } | |
848 | #endif | |
849 | ||
850 | #ifdef L_gcov_ior_profiler | |
851 | /* Increase corresponding COUNTER by VALUE. FIXME: Perhaps we want | |
852 | to saturate up. */ | |
853 | ||
854 | void | |
855 | __gcov_ior_profiler (gcov_type *counters, gcov_type value) | |
856 | { | |
857 | *counters |= value; | |
858 | } | |
859 | #endif | |
860 | ||
d1c38823 ZD |
861 | #ifdef L_gcov_fork |
862 | /* A wrapper for the fork function. Flushes the accumulated profiling data, so | |
863 | that they are not counted twice. */ | |
864 | ||
865 | pid_t | |
866 | __gcov_fork (void) | |
867 | { | |
868 | __gcov_flush (); | |
869 | return fork (); | |
870 | } | |
871 | #endif | |
872 | ||
873 | #ifdef L_gcov_execl | |
874 | /* A wrapper for the execl function. Flushes the accumulated profiling data, so | |
875 | that they are not lost. */ | |
876 | ||
877 | int | |
cbb8dee3 | 878 | __gcov_execl (const char *path, char *arg, ...) |
d1c38823 ZD |
879 | { |
880 | va_list ap, aq; | |
881 | unsigned i, length; | |
882 | char **args; | |
883 | ||
884 | __gcov_flush (); | |
885 | ||
886 | va_start (ap, arg); | |
887 | va_copy (aq, ap); | |
888 | ||
889 | length = 2; | |
890 | while (va_arg (ap, char *)) | |
891 | length++; | |
892 | va_end (ap); | |
893 | ||
858904db | 894 | args = (char **) alloca (length * sizeof (void *)); |
cbb8dee3 | 895 | args[0] = arg; |
d1c38823 ZD |
896 | for (i = 1; i < length; i++) |
897 | args[i] = va_arg (aq, char *); | |
898 | va_end (aq); | |
899 | ||
900 | return execv (path, args); | |
901 | } | |
902 | #endif | |
903 | ||
904 | #ifdef L_gcov_execlp | |
905 | /* A wrapper for the execlp function. Flushes the accumulated profiling data, so | |
906 | that they are not lost. */ | |
907 | ||
908 | int | |
cbb8dee3 | 909 | __gcov_execlp (const char *path, char *arg, ...) |
d1c38823 ZD |
910 | { |
911 | va_list ap, aq; | |
912 | unsigned i, length; | |
913 | char **args; | |
914 | ||
915 | __gcov_flush (); | |
916 | ||
917 | va_start (ap, arg); | |
918 | va_copy (aq, ap); | |
919 | ||
920 | length = 2; | |
921 | while (va_arg (ap, char *)) | |
922 | length++; | |
923 | va_end (ap); | |
924 | ||
858904db | 925 | args = (char **) alloca (length * sizeof (void *)); |
cbb8dee3 | 926 | args[0] = arg; |
d1c38823 ZD |
927 | for (i = 1; i < length; i++) |
928 | args[i] = va_arg (aq, char *); | |
929 | va_end (aq); | |
930 | ||
931 | return execvp (path, args); | |
932 | } | |
933 | #endif | |
934 | ||
935 | #ifdef L_gcov_execle | |
936 | /* A wrapper for the execle function. Flushes the accumulated profiling data, so | |
937 | that they are not lost. */ | |
938 | ||
939 | int | |
cbb8dee3 | 940 | __gcov_execle (const char *path, char *arg, ...) |
d1c38823 ZD |
941 | { |
942 | va_list ap, aq; | |
943 | unsigned i, length; | |
944 | char **args; | |
945 | char **envp; | |
946 | ||
947 | __gcov_flush (); | |
948 | ||
949 | va_start (ap, arg); | |
950 | va_copy (aq, ap); | |
951 | ||
952 | length = 2; | |
953 | while (va_arg (ap, char *)) | |
954 | length++; | |
955 | va_end (ap); | |
956 | ||
858904db | 957 | args = (char **) alloca (length * sizeof (void *)); |
cbb8dee3 | 958 | args[0] = arg; |
d1c38823 ZD |
959 | for (i = 1; i < length; i++) |
960 | args[i] = va_arg (aq, char *); | |
961 | envp = va_arg (aq, char **); | |
962 | va_end (aq); | |
963 | ||
964 | return execve (path, args, envp); | |
965 | } | |
966 | #endif | |
967 | ||
968 | #ifdef L_gcov_execv | |
969 | /* A wrapper for the execv function. Flushes the accumulated profiling data, so | |
970 | that they are not lost. */ | |
971 | ||
972 | int | |
973 | __gcov_execv (const char *path, char *const argv[]) | |
974 | { | |
975 | __gcov_flush (); | |
976 | return execv (path, argv); | |
977 | } | |
978 | #endif | |
979 | ||
980 | #ifdef L_gcov_execvp | |
981 | /* A wrapper for the execvp function. Flushes the accumulated profiling data, so | |
982 | that they are not lost. */ | |
983 | ||
984 | int | |
985 | __gcov_execvp (const char *path, char *const argv[]) | |
986 | { | |
987 | __gcov_flush (); | |
988 | return execvp (path, argv); | |
989 | } | |
990 | #endif | |
991 | ||
992 | #ifdef L_gcov_execve | |
993 | /* A wrapper for the execve function. Flushes the accumulated profiling data, so | |
994 | that they are not lost. */ | |
995 | ||
996 | int | |
997 | __gcov_execve (const char *path, char *const argv[], char *const envp[]) | |
998 | { | |
999 | __gcov_flush (); | |
1000 | return execve (path, argv, envp); | |
1001 | } | |
1002 | #endif | |
01e60c33 | 1003 | #endif /* inhibit_libc */ |