Commit | Line | Data |
---|---|---|
7b2567c1 ACM |
1 | /* |
2 | * build-id.c | |
3 | * | |
4 | * build-id support | |
5 | * | |
6 | * Copyright (C) 2009, 2010 Red Hat Inc. | |
7 | * Copyright (C) 2009, 2010 Arnaldo Carvalho de Melo <acme@redhat.com> | |
8 | */ | |
b36f19d5 | 9 | #include "util.h" |
76b31a29 | 10 | #include <dirent.h> |
a43783ae | 11 | #include <errno.h> |
b36f19d5 | 12 | #include <stdio.h> |
7a8ef4c4 ACM |
13 | #include <sys/stat.h> |
14 | #include <sys/types.h> | |
7b2567c1 ACM |
15 | #include "build-id.h" |
16 | #include "event.h" | |
17 | #include "symbol.h" | |
e7ff8920 | 18 | #include "thread.h" |
7b2567c1 | 19 | #include <linux/kernel.h> |
591765fd | 20 | #include "debug.h" |
d20deb64 | 21 | #include "session.h" |
45694aa7 | 22 | #include "tool.h" |
e195fac8 NK |
23 | #include "header.h" |
24 | #include "vdso.h" | |
9a3993d4 | 25 | #include "path.h" |
6430a94e | 26 | #include "probe-file.h" |
8ec20b17 | 27 | #include "strlist.h" |
7b2567c1 | 28 | |
3d689ed6 | 29 | #include "sane_ctype.h" |
73c5d224 NK |
30 | |
31 | static bool no_buildid_cache; | |
32 | ||
54a3cf59 AV |
33 | int build_id__mark_dso_hit(struct perf_tool *tool __maybe_unused, |
34 | union perf_event *event, | |
ef89325f | 35 | struct perf_sample *sample, |
54a3cf59 AV |
36 | struct perf_evsel *evsel __maybe_unused, |
37 | struct machine *machine) | |
7b2567c1 ACM |
38 | { |
39 | struct addr_location al; | |
ef89325f | 40 | struct thread *thread = machine__findnew_thread(machine, sample->pid, |
13ce34df | 41 | sample->tid); |
7b2567c1 ACM |
42 | |
43 | if (thread == NULL) { | |
44 | pr_err("problem processing %d event, skipping it.\n", | |
45 | event->header.type); | |
46 | return -1; | |
47 | } | |
48 | ||
473398a2 | 49 | thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->ip, &al); |
7b2567c1 ACM |
50 | |
51 | if (al.map != NULL) | |
52 | al.map->dso->hit = 1; | |
53 | ||
b91fc39f | 54 | thread__put(thread); |
7b2567c1 ACM |
55 | return 0; |
56 | } | |
57 | ||
1d037ca1 | 58 | static int perf_event__exit_del_thread(struct perf_tool *tool __maybe_unused, |
d20deb64 | 59 | union perf_event *event, |
1d037ca1 IT |
60 | struct perf_sample *sample |
61 | __maybe_unused, | |
743eb868 | 62 | struct machine *machine) |
591765fd | 63 | { |
314add6b AH |
64 | struct thread *thread = machine__findnew_thread(machine, |
65 | event->fork.pid, | |
66 | event->fork.tid); | |
591765fd | 67 | |
8115d60c ACM |
68 | dump_printf("(%d:%d):(%d:%d)\n", event->fork.pid, event->fork.tid, |
69 | event->fork.ppid, event->fork.ptid); | |
591765fd | 70 | |
b91fc39f | 71 | if (thread) { |
5e78c69b | 72 | machine__remove_thread(machine, thread); |
b91fc39f ACM |
73 | thread__put(thread); |
74 | } | |
591765fd ACM |
75 | |
76 | return 0; | |
77 | } | |
78 | ||
45694aa7 | 79 | struct perf_tool build_id__mark_dso_hit_ops = { |
7b2567c1 | 80 | .sample = build_id__mark_dso_hit, |
8115d60c | 81 | .mmap = perf_event__process_mmap, |
5c5e854b | 82 | .mmap2 = perf_event__process_mmap2, |
f62d3f0f | 83 | .fork = perf_event__process_fork, |
8115d60c | 84 | .exit = perf_event__exit_del_thread, |
299c3452 SE |
85 | .attr = perf_event__process_attr, |
86 | .build_id = perf_event__process_build_id, | |
1216b65c | 87 | .ordered_events = true, |
7b2567c1 | 88 | }; |
b36f19d5 | 89 | |
ebb296c2 JO |
90 | int build_id__sprintf(const u8 *build_id, int len, char *bf) |
91 | { | |
92 | char *bid = bf; | |
93 | const u8 *raw = build_id; | |
94 | int i; | |
95 | ||
96 | for (i = 0; i < len; ++i) { | |
97 | sprintf(bid, "%02x", *raw); | |
98 | ++raw; | |
99 | bid += 2; | |
100 | } | |
101 | ||
7375e151 | 102 | return (bid - bf) + 1; |
ebb296c2 JO |
103 | } |
104 | ||
0b5a7935 MH |
105 | int sysfs__sprintf_build_id(const char *root_dir, char *sbuild_id) |
106 | { | |
107 | char notes[PATH_MAX]; | |
108 | u8 build_id[BUILD_ID_SIZE]; | |
109 | int ret; | |
110 | ||
111 | if (!root_dir) | |
112 | root_dir = ""; | |
113 | ||
114 | scnprintf(notes, sizeof(notes), "%s/sys/kernel/notes", root_dir); | |
115 | ||
116 | ret = sysfs__read_build_id(notes, build_id, sizeof(build_id)); | |
117 | if (ret < 0) | |
118 | return ret; | |
119 | ||
120 | return build_id__sprintf(build_id, sizeof(build_id), sbuild_id); | |
121 | } | |
122 | ||
123 | int filename__sprintf_build_id(const char *pathname, char *sbuild_id) | |
124 | { | |
125 | u8 build_id[BUILD_ID_SIZE]; | |
126 | int ret; | |
127 | ||
128 | ret = filename__read_build_id(pathname, build_id, sizeof(build_id)); | |
129 | if (ret < 0) | |
130 | return ret; | |
131 | else if (ret != sizeof(build_id)) | |
132 | return -EINVAL; | |
133 | ||
134 | return build_id__sprintf(build_id, sizeof(build_id), sbuild_id); | |
135 | } | |
136 | ||
5cb113fd MH |
137 | /* asnprintf consolidates asprintf and snprintf */ |
138 | static int asnprintf(char **strp, size_t size, const char *fmt, ...) | |
139 | { | |
140 | va_list ap; | |
141 | int ret; | |
142 | ||
143 | if (!strp) | |
144 | return -EINVAL; | |
145 | ||
146 | va_start(ap, fmt); | |
147 | if (*strp) | |
148 | ret = vsnprintf(*strp, size, fmt, ap); | |
149 | else | |
150 | ret = vasprintf(strp, fmt, ap); | |
151 | va_end(ap); | |
152 | ||
153 | return ret; | |
154 | } | |
155 | ||
01412261 MH |
156 | char *build_id_cache__kallsyms_path(const char *sbuild_id, char *bf, |
157 | size_t size) | |
158 | { | |
01412261 MH |
159 | bool retry_old = true; |
160 | ||
c58c49ac WN |
161 | snprintf(bf, size, "%s/%s/%s/kallsyms", |
162 | buildid_dir, DSO__NAME_KALLSYMS, sbuild_id); | |
01412261 MH |
163 | retry: |
164 | if (!access(bf, F_OK)) | |
165 | return bf; | |
01412261 MH |
166 | if (retry_old) { |
167 | /* Try old style kallsyms cache */ | |
c58c49ac WN |
168 | snprintf(bf, size, "%s/%s/%s", |
169 | buildid_dir, DSO__NAME_KALLSYMS, sbuild_id); | |
01412261 MH |
170 | retry_old = false; |
171 | goto retry; | |
172 | } | |
173 | ||
174 | return NULL; | |
175 | } | |
176 | ||
1f3736c9 | 177 | char *build_id_cache__linkname(const char *sbuild_id, char *bf, size_t size) |
5cb113fd MH |
178 | { |
179 | char *tmp = bf; | |
180 | int ret = asnprintf(&bf, size, "%s/.build-id/%.2s/%s", buildid_dir, | |
181 | sbuild_id, sbuild_id + 2); | |
182 | if (ret < 0 || (tmp && size < (unsigned int)ret)) | |
183 | return NULL; | |
184 | return bf; | |
185 | } | |
186 | ||
1f3736c9 MH |
187 | char *build_id_cache__origname(const char *sbuild_id) |
188 | { | |
189 | char *linkname; | |
190 | char buf[PATH_MAX]; | |
191 | char *ret = NULL, *p; | |
192 | size_t offs = 5; /* == strlen("../..") */ | |
5a234211 | 193 | ssize_t len; |
1f3736c9 MH |
194 | |
195 | linkname = build_id_cache__linkname(sbuild_id, NULL, 0); | |
196 | if (!linkname) | |
197 | return NULL; | |
198 | ||
5a234211 TR |
199 | len = readlink(linkname, buf, sizeof(buf) - 1); |
200 | if (len <= 0) | |
1f3736c9 | 201 | goto out; |
5a234211 TR |
202 | buf[len] = '\0'; |
203 | ||
1f3736c9 MH |
204 | /* The link should be "../..<origpath>/<sbuild_id>" */ |
205 | p = strrchr(buf, '/'); /* Cut off the "/<sbuild_id>" */ | |
206 | if (p && (p > buf + offs)) { | |
207 | *p = '\0'; | |
208 | if (buf[offs + 1] == '[') | |
209 | offs++; /* | |
210 | * This is a DSO name, like [kernel.kallsyms]. | |
211 | * Skip the first '/', since this is not the | |
212 | * cache of a regular file. | |
213 | */ | |
214 | ret = strdup(buf + offs); /* Skip "../..[/]" */ | |
215 | } | |
216 | out: | |
217 | free(linkname); | |
218 | return ret; | |
219 | } | |
220 | ||
c3492a3a MH |
221 | /* Check if the given build_id cache is valid on current running system */ |
222 | static bool build_id_cache__valid_id(char *sbuild_id) | |
223 | { | |
224 | char real_sbuild_id[SBUILD_ID_SIZE] = ""; | |
225 | char *pathname; | |
226 | int ret = 0; | |
227 | bool result = false; | |
228 | ||
229 | pathname = build_id_cache__origname(sbuild_id); | |
230 | if (!pathname) | |
231 | return false; | |
232 | ||
233 | if (!strcmp(pathname, DSO__NAME_KALLSYMS)) | |
234 | ret = sysfs__sprintf_build_id("/", real_sbuild_id); | |
235 | else if (pathname[0] == '/') | |
236 | ret = filename__sprintf_build_id(pathname, real_sbuild_id); | |
237 | else | |
238 | ret = -EINVAL; /* Should we support other special DSO cache? */ | |
239 | if (ret >= 0) | |
240 | result = (strcmp(sbuild_id, real_sbuild_id) == 0); | |
241 | free(pathname); | |
242 | ||
243 | return result; | |
244 | } | |
245 | ||
01412261 MH |
246 | static const char *build_id_cache__basename(bool is_kallsyms, bool is_vdso) |
247 | { | |
248 | return is_kallsyms ? "kallsyms" : (is_vdso ? "vdso" : "elf"); | |
249 | } | |
250 | ||
3344996e | 251 | char *dso__build_id_filename(const struct dso *dso, char *bf, size_t size) |
b36f19d5 | 252 | { |
01412261 MH |
253 | bool is_kallsyms = dso__is_kallsyms((struct dso *)dso); |
254 | bool is_vdso = dso__is_vdso((struct dso *)dso); | |
255 | char sbuild_id[SBUILD_ID_SIZE]; | |
256 | char *linkname; | |
257 | bool alloc = (bf == NULL); | |
258 | int ret; | |
b36f19d5 | 259 | |
c824c433 | 260 | if (!dso->has_build_id) |
b36f19d5 ACM |
261 | return NULL; |
262 | ||
01412261 MH |
263 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); |
264 | linkname = build_id_cache__linkname(sbuild_id, NULL, 0); | |
265 | if (!linkname) | |
266 | return NULL; | |
267 | ||
268 | /* Check if old style build_id cache */ | |
269 | if (is_regular_file(linkname)) | |
270 | ret = asnprintf(&bf, size, "%s", linkname); | |
271 | else | |
272 | ret = asnprintf(&bf, size, "%s/%s", linkname, | |
273 | build_id_cache__basename(is_kallsyms, is_vdso)); | |
274 | if (ret < 0 || (!alloc && size < (unsigned int)ret)) | |
275 | bf = NULL; | |
276 | free(linkname); | |
277 | ||
278 | return bf; | |
b36f19d5 | 279 | } |
e195fac8 NK |
280 | |
281 | #define dsos__for_each_with_build_id(pos, head) \ | |
282 | list_for_each_entry(pos, head, node) \ | |
283 | if (!pos->has_build_id) \ | |
284 | continue; \ | |
285 | else | |
286 | ||
287 | static int write_buildid(const char *name, size_t name_len, u8 *build_id, | |
288 | pid_t pid, u16 misc, int fd) | |
289 | { | |
290 | int err; | |
291 | struct build_id_event b; | |
292 | size_t len; | |
293 | ||
294 | len = name_len + 1; | |
295 | len = PERF_ALIGN(len, NAME_ALIGN); | |
296 | ||
297 | memset(&b, 0, sizeof(b)); | |
298 | memcpy(&b.build_id, build_id, BUILD_ID_SIZE); | |
299 | b.pid = pid; | |
300 | b.header.misc = misc; | |
301 | b.header.size = sizeof(b) + len; | |
302 | ||
303 | err = writen(fd, &b, sizeof(b)); | |
304 | if (err < 0) | |
305 | return err; | |
306 | ||
307 | return write_padded(fd, name, name_len + 1, len); | |
308 | } | |
309 | ||
3d39ac53 | 310 | static int machine__write_buildid_table(struct machine *machine, int fd) |
e195fac8 | 311 | { |
3d39ac53 | 312 | int err = 0; |
e195fac8 NK |
313 | char nm[PATH_MAX]; |
314 | struct dso *pos; | |
3d39ac53 ACM |
315 | u16 kmisc = PERF_RECORD_MISC_KERNEL, |
316 | umisc = PERF_RECORD_MISC_USER; | |
317 | ||
318 | if (!machine__is_host(machine)) { | |
319 | kmisc = PERF_RECORD_MISC_GUEST_KERNEL; | |
320 | umisc = PERF_RECORD_MISC_GUEST_USER; | |
321 | } | |
e195fac8 | 322 | |
3d39ac53 | 323 | dsos__for_each_with_build_id(pos, &machine->dsos.head) { |
e195fac8 NK |
324 | const char *name; |
325 | size_t name_len; | |
fd786fac | 326 | bool in_kernel = false; |
e195fac8 | 327 | |
6ae98ba6 | 328 | if (!pos->hit && !dso__is_vdso(pos)) |
e195fac8 NK |
329 | continue; |
330 | ||
331 | if (dso__is_vdso(pos)) { | |
332 | name = pos->short_name; | |
70a2cba9 | 333 | name_len = pos->short_name_len; |
e195fac8 NK |
334 | } else if (dso__is_kcore(pos)) { |
335 | machine__mmap_name(machine, nm, sizeof(nm)); | |
336 | name = nm; | |
70a2cba9 | 337 | name_len = strlen(nm); |
e195fac8 NK |
338 | } else { |
339 | name = pos->long_name; | |
70a2cba9 | 340 | name_len = pos->long_name_len; |
e195fac8 NK |
341 | } |
342 | ||
fd786fac WN |
343 | in_kernel = pos->kernel || |
344 | is_kernel_module(name, | |
345 | PERF_RECORD_MISC_CPUMODE_UNKNOWN); | |
3d39ac53 | 346 | err = write_buildid(name, name_len, pos->build_id, machine->pid, |
fd786fac | 347 | in_kernel ? kmisc : umisc, fd); |
e195fac8 | 348 | if (err) |
3d39ac53 | 349 | break; |
e195fac8 NK |
350 | } |
351 | ||
e195fac8 NK |
352 | return err; |
353 | } | |
354 | ||
355 | int perf_session__write_buildid_table(struct perf_session *session, int fd) | |
356 | { | |
357 | struct rb_node *nd; | |
358 | int err = machine__write_buildid_table(&session->machines.host, fd); | |
359 | ||
360 | if (err) | |
361 | return err; | |
362 | ||
363 | for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) { | |
364 | struct machine *pos = rb_entry(nd, struct machine, rb_node); | |
365 | err = machine__write_buildid_table(pos, fd); | |
366 | if (err) | |
367 | break; | |
368 | } | |
369 | return err; | |
370 | } | |
371 | ||
372 | static int __dsos__hit_all(struct list_head *head) | |
373 | { | |
374 | struct dso *pos; | |
375 | ||
376 | list_for_each_entry(pos, head, node) | |
377 | pos->hit = true; | |
378 | ||
379 | return 0; | |
380 | } | |
381 | ||
382 | static int machine__hit_all_dsos(struct machine *machine) | |
383 | { | |
3d39ac53 | 384 | return __dsos__hit_all(&machine->dsos.head); |
e195fac8 NK |
385 | } |
386 | ||
387 | int dsos__hit_all(struct perf_session *session) | |
388 | { | |
389 | struct rb_node *nd; | |
390 | int err; | |
391 | ||
392 | err = machine__hit_all_dsos(&session->machines.host); | |
393 | if (err) | |
394 | return err; | |
395 | ||
396 | for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) { | |
397 | struct machine *pos = rb_entry(nd, struct machine, rb_node); | |
398 | ||
399 | err = machine__hit_all_dsos(pos); | |
400 | if (err) | |
401 | return err; | |
402 | } | |
403 | ||
404 | return 0; | |
405 | } | |
406 | ||
73c5d224 NK |
407 | void disable_buildid_cache(void) |
408 | { | |
409 | no_buildid_cache = true; | |
410 | } | |
411 | ||
1f3736c9 | 412 | static bool lsdir_bid_head_filter(const char *name __maybe_unused, |
767fe71b | 413 | struct dirent *d) |
1f3736c9 MH |
414 | { |
415 | return (strlen(d->d_name) == 2) && | |
416 | isxdigit(d->d_name[0]) && isxdigit(d->d_name[1]); | |
417 | } | |
418 | ||
419 | static bool lsdir_bid_tail_filter(const char *name __maybe_unused, | |
767fe71b | 420 | struct dirent *d) |
1f3736c9 MH |
421 | { |
422 | int i = 0; | |
423 | while (isxdigit(d->d_name[i]) && i < SBUILD_ID_SIZE - 3) | |
424 | i++; | |
425 | return (i == SBUILD_ID_SIZE - 3) && (d->d_name[i] == '\0'); | |
426 | } | |
427 | ||
c3492a3a | 428 | struct strlist *build_id_cache__list_all(bool validonly) |
1f3736c9 MH |
429 | { |
430 | struct strlist *toplist, *linklist = NULL, *bidlist; | |
431 | struct str_node *nd, *nd2; | |
432 | char *topdir, *linkdir = NULL; | |
433 | char sbuild_id[SBUILD_ID_SIZE]; | |
434 | ||
c3492a3a MH |
435 | /* for filename__ functions */ |
436 | if (validonly) | |
437 | symbol__init(NULL); | |
438 | ||
1f3736c9 MH |
439 | /* Open the top-level directory */ |
440 | if (asprintf(&topdir, "%s/.build-id/", buildid_dir) < 0) | |
441 | return NULL; | |
442 | ||
443 | bidlist = strlist__new(NULL, NULL); | |
444 | if (!bidlist) | |
445 | goto out; | |
446 | ||
447 | toplist = lsdir(topdir, lsdir_bid_head_filter); | |
448 | if (!toplist) { | |
449 | pr_debug("Error in lsdir(%s): %d\n", topdir, errno); | |
450 | /* If there is no buildid cache, return an empty list */ | |
451 | if (errno == ENOENT) | |
452 | goto out; | |
453 | goto err_out; | |
454 | } | |
455 | ||
456 | strlist__for_each_entry(nd, toplist) { | |
457 | if (asprintf(&linkdir, "%s/%s", topdir, nd->s) < 0) | |
458 | goto err_out; | |
459 | /* Open the lower-level directory */ | |
460 | linklist = lsdir(linkdir, lsdir_bid_tail_filter); | |
461 | if (!linklist) { | |
462 | pr_debug("Error in lsdir(%s): %d\n", linkdir, errno); | |
463 | goto err_out; | |
464 | } | |
465 | strlist__for_each_entry(nd2, linklist) { | |
466 | if (snprintf(sbuild_id, SBUILD_ID_SIZE, "%s%s", | |
467 | nd->s, nd2->s) != SBUILD_ID_SIZE - 1) | |
468 | goto err_out; | |
c3492a3a MH |
469 | if (validonly && !build_id_cache__valid_id(sbuild_id)) |
470 | continue; | |
1f3736c9 MH |
471 | if (strlist__add(bidlist, sbuild_id) < 0) |
472 | goto err_out; | |
473 | } | |
474 | strlist__delete(linklist); | |
475 | zfree(&linkdir); | |
476 | } | |
477 | ||
478 | out_free: | |
479 | strlist__delete(toplist); | |
480 | out: | |
481 | free(topdir); | |
482 | ||
483 | return bidlist; | |
484 | ||
485 | err_out: | |
486 | strlist__delete(linklist); | |
487 | zfree(&linkdir); | |
488 | strlist__delete(bidlist); | |
489 | bidlist = NULL; | |
490 | goto out_free; | |
491 | } | |
492 | ||
a598180a MH |
493 | static bool str_is_build_id(const char *maybe_sbuild_id, size_t len) |
494 | { | |
495 | size_t i; | |
496 | ||
497 | for (i = 0; i < len; i++) { | |
498 | if (!isxdigit(maybe_sbuild_id[i])) | |
499 | return false; | |
500 | } | |
501 | return true; | |
502 | } | |
503 | ||
504 | /* Return the valid complete build-id */ | |
505 | char *build_id_cache__complement(const char *incomplete_sbuild_id) | |
506 | { | |
507 | struct strlist *bidlist; | |
508 | struct str_node *nd, *cand = NULL; | |
509 | char *sbuild_id = NULL; | |
510 | size_t len = strlen(incomplete_sbuild_id); | |
511 | ||
512 | if (len >= SBUILD_ID_SIZE || | |
513 | !str_is_build_id(incomplete_sbuild_id, len)) | |
514 | return NULL; | |
515 | ||
516 | bidlist = build_id_cache__list_all(true); | |
517 | if (!bidlist) | |
518 | return NULL; | |
519 | ||
520 | strlist__for_each_entry(nd, bidlist) { | |
521 | if (strncmp(nd->s, incomplete_sbuild_id, len) != 0) | |
522 | continue; | |
523 | if (cand) { /* Error: There are more than 2 candidates. */ | |
524 | cand = NULL; | |
525 | break; | |
526 | } | |
527 | cand = nd; | |
528 | } | |
529 | if (cand) | |
530 | sbuild_id = strdup(cand->s); | |
531 | strlist__delete(bidlist); | |
532 | ||
533 | return sbuild_id; | |
534 | } | |
535 | ||
4698b8b7 MH |
536 | char *build_id_cache__cachedir(const char *sbuild_id, const char *name, |
537 | bool is_kallsyms, bool is_vdso) | |
8d8c8e4c MH |
538 | { |
539 | char *realname = (char *)name, *filename; | |
540 | bool slash = is_kallsyms || is_vdso; | |
541 | ||
542 | if (!slash) { | |
543 | realname = realpath(name, NULL); | |
544 | if (!realname) | |
545 | return NULL; | |
546 | } | |
547 | ||
01412261 MH |
548 | if (asprintf(&filename, "%s%s%s%s%s", buildid_dir, slash ? "/" : "", |
549 | is_vdso ? DSO__NAME_VDSO : realname, | |
550 | sbuild_id ? "/" : "", sbuild_id ?: "") < 0) | |
8d8c8e4c MH |
551 | filename = NULL; |
552 | ||
553 | if (!slash) | |
554 | free(realname); | |
555 | ||
556 | return filename; | |
557 | } | |
558 | ||
559 | int build_id_cache__list_build_ids(const char *pathname, | |
560 | struct strlist **result) | |
561 | { | |
8d8c8e4c | 562 | char *dir_name; |
8d8c8e4c MH |
563 | int ret = 0; |
564 | ||
4698b8b7 | 565 | dir_name = build_id_cache__cachedir(NULL, pathname, false, false); |
d65444d2 MH |
566 | if (!dir_name) |
567 | return -ENOMEM; | |
8d8c8e4c | 568 | |
d65444d2 MH |
569 | *result = lsdir(dir_name, lsdir_no_dot_filter); |
570 | if (!*result) | |
8d8c8e4c | 571 | ret = -errno; |
8d8c8e4c | 572 | free(dir_name); |
8d8c8e4c MH |
573 | |
574 | return ret; | |
575 | } | |
576 | ||
1c1a3a47 | 577 | #if defined(HAVE_LIBELF_SUPPORT) && defined(HAVE_GELF_GETNOTE_SUPPORT) |
6430a94e MH |
578 | static int build_id_cache__add_sdt_cache(const char *sbuild_id, |
579 | const char *realname) | |
580 | { | |
581 | struct probe_cache *cache; | |
582 | int ret; | |
583 | ||
584 | cache = probe_cache__new(sbuild_id); | |
585 | if (!cache) | |
586 | return -1; | |
587 | ||
588 | ret = probe_cache__scan_sdt(cache, realname); | |
589 | if (ret >= 0) { | |
f9655200 | 590 | pr_debug4("Found %d SDTs in %s\n", ret, realname); |
6430a94e MH |
591 | if (probe_cache__commit(cache) < 0) |
592 | ret = -1; | |
593 | } | |
594 | probe_cache__delete(cache); | |
595 | return ret; | |
596 | } | |
597 | #else | |
598 | #define build_id_cache__add_sdt_cache(sbuild_id, realname) (0) | |
599 | #endif | |
600 | ||
e35f7362 MH |
601 | int build_id_cache__add_s(const char *sbuild_id, const char *name, |
602 | bool is_kallsyms, bool is_vdso) | |
e195fac8 NK |
603 | { |
604 | const size_t size = PATH_MAX; | |
8d8c8e4c | 605 | char *realname = NULL, *filename = NULL, *dir_name = NULL, |
01412261 | 606 | *linkname = zalloc(size), *tmp; |
8d8c8e4c | 607 | int err = -1; |
e195fac8 | 608 | |
8d8c8e4c | 609 | if (!is_kallsyms) { |
e195fac8 | 610 | realname = realpath(name, NULL); |
8d8c8e4c MH |
611 | if (!realname) |
612 | goto out_free; | |
613 | } | |
e195fac8 | 614 | |
4698b8b7 MH |
615 | dir_name = build_id_cache__cachedir(sbuild_id, name, |
616 | is_kallsyms, is_vdso); | |
8d8c8e4c | 617 | if (!dir_name) |
e195fac8 NK |
618 | goto out_free; |
619 | ||
01412261 MH |
620 | /* Remove old style build-id cache */ |
621 | if (is_regular_file(dir_name)) | |
622 | if (unlink(dir_name)) | |
623 | goto out_free; | |
624 | ||
8d8c8e4c | 625 | if (mkdir_p(dir_name, 0755)) |
e195fac8 NK |
626 | goto out_free; |
627 | ||
01412261 MH |
628 | /* Save the allocated buildid dirname */ |
629 | if (asprintf(&filename, "%s/%s", dir_name, | |
630 | build_id_cache__basename(is_kallsyms, is_vdso)) < 0) { | |
8d8c8e4c MH |
631 | filename = NULL; |
632 | goto out_free; | |
633 | } | |
e195fac8 NK |
634 | |
635 | if (access(filename, F_OK)) { | |
636 | if (is_kallsyms) { | |
637 | if (copyfile("/proc/kallsyms", filename)) | |
638 | goto out_free; | |
0635b0f7 MV |
639 | } else if (link(realname, filename) && errno != EEXIST && |
640 | copyfile(name, filename)) | |
e195fac8 NK |
641 | goto out_free; |
642 | } | |
643 | ||
01412261 | 644 | if (!build_id_cache__linkname(sbuild_id, linkname, size)) |
5cb113fd MH |
645 | goto out_free; |
646 | tmp = strrchr(linkname, '/'); | |
647 | *tmp = '\0'; | |
e195fac8 NK |
648 | |
649 | if (access(linkname, X_OK) && mkdir_p(linkname, 0755)) | |
650 | goto out_free; | |
651 | ||
5cb113fd | 652 | *tmp = '/'; |
01412261 MH |
653 | tmp = dir_name + strlen(buildid_dir) - 5; |
654 | memcpy(tmp, "../..", 5); | |
e195fac8 | 655 | |
01412261 | 656 | if (symlink(tmp, linkname) == 0) |
e195fac8 | 657 | err = 0; |
6430a94e MH |
658 | |
659 | /* Update SDT cache : error is just warned */ | |
2ccc2202 | 660 | if (realname && build_id_cache__add_sdt_cache(sbuild_id, realname) < 0) |
f9655200 | 661 | pr_debug4("Failed to update/scan SDT cache for %s\n", realname); |
6430a94e | 662 | |
e195fac8 NK |
663 | out_free: |
664 | if (!is_kallsyms) | |
665 | free(realname); | |
666 | free(filename); | |
8d8c8e4c | 667 | free(dir_name); |
e195fac8 NK |
668 | free(linkname); |
669 | return err; | |
670 | } | |
671 | ||
672 | static int build_id_cache__add_b(const u8 *build_id, size_t build_id_size, | |
e35f7362 MH |
673 | const char *name, bool is_kallsyms, |
674 | bool is_vdso) | |
e195fac8 | 675 | { |
d77fac7f | 676 | char sbuild_id[SBUILD_ID_SIZE]; |
e195fac8 NK |
677 | |
678 | build_id__sprintf(build_id, build_id_size, sbuild_id); | |
679 | ||
e35f7362 | 680 | return build_id_cache__add_s(sbuild_id, name, is_kallsyms, is_vdso); |
e195fac8 NK |
681 | } |
682 | ||
a50d11a1 MH |
683 | bool build_id_cache__cached(const char *sbuild_id) |
684 | { | |
685 | bool ret = false; | |
01412261 | 686 | char *filename = build_id_cache__linkname(sbuild_id, NULL, 0); |
a50d11a1 MH |
687 | |
688 | if (filename && !access(filename, F_OK)) | |
689 | ret = true; | |
690 | free(filename); | |
691 | ||
692 | return ret; | |
693 | } | |
694 | ||
e35f7362 | 695 | int build_id_cache__remove_s(const char *sbuild_id) |
e195fac8 NK |
696 | { |
697 | const size_t size = PATH_MAX; | |
698 | char *filename = zalloc(size), | |
5cb113fd | 699 | *linkname = zalloc(size), *tmp; |
e195fac8 NK |
700 | int err = -1; |
701 | ||
702 | if (filename == NULL || linkname == NULL) | |
703 | goto out_free; | |
704 | ||
01412261 | 705 | if (!build_id_cache__linkname(sbuild_id, linkname, size)) |
5cb113fd | 706 | goto out_free; |
e195fac8 NK |
707 | |
708 | if (access(linkname, F_OK)) | |
709 | goto out_free; | |
710 | ||
711 | if (readlink(linkname, filename, size - 1) < 0) | |
712 | goto out_free; | |
713 | ||
714 | if (unlink(linkname)) | |
715 | goto out_free; | |
716 | ||
717 | /* | |
718 | * Since the link is relative, we must make it absolute: | |
719 | */ | |
5cb113fd MH |
720 | tmp = strrchr(linkname, '/') + 1; |
721 | snprintf(tmp, size - (tmp - linkname), "%s", filename); | |
e195fac8 | 722 | |
01412261 | 723 | if (rm_rf(linkname)) |
e195fac8 NK |
724 | goto out_free; |
725 | ||
726 | err = 0; | |
727 | out_free: | |
728 | free(filename); | |
729 | free(linkname); | |
730 | return err; | |
731 | } | |
732 | ||
e35f7362 | 733 | static int dso__cache_build_id(struct dso *dso, struct machine *machine) |
e195fac8 | 734 | { |
01412261 | 735 | bool is_kallsyms = dso__is_kallsyms(dso); |
e195fac8 NK |
736 | bool is_vdso = dso__is_vdso(dso); |
737 | const char *name = dso->long_name; | |
738 | char nm[PATH_MAX]; | |
739 | ||
740 | if (dso__is_kcore(dso)) { | |
741 | is_kallsyms = true; | |
742 | machine__mmap_name(machine, nm, sizeof(nm)); | |
743 | name = nm; | |
744 | } | |
745 | return build_id_cache__add_b(dso->build_id, sizeof(dso->build_id), name, | |
e35f7362 | 746 | is_kallsyms, is_vdso); |
e195fac8 NK |
747 | } |
748 | ||
749 | static int __dsos__cache_build_ids(struct list_head *head, | |
e35f7362 | 750 | struct machine *machine) |
e195fac8 NK |
751 | { |
752 | struct dso *pos; | |
753 | int err = 0; | |
754 | ||
755 | dsos__for_each_with_build_id(pos, head) | |
e35f7362 | 756 | if (dso__cache_build_id(pos, machine)) |
e195fac8 NK |
757 | err = -1; |
758 | ||
759 | return err; | |
760 | } | |
761 | ||
e35f7362 | 762 | static int machine__cache_build_ids(struct machine *machine) |
e195fac8 | 763 | { |
3d39ac53 | 764 | return __dsos__cache_build_ids(&machine->dsos.head, machine); |
e195fac8 NK |
765 | } |
766 | ||
767 | int perf_session__cache_build_ids(struct perf_session *session) | |
768 | { | |
769 | struct rb_node *nd; | |
770 | int ret; | |
e195fac8 | 771 | |
73c5d224 NK |
772 | if (no_buildid_cache) |
773 | return 0; | |
774 | ||
498922ad | 775 | if (mkdir(buildid_dir, 0755) != 0 && errno != EEXIST) |
e195fac8 NK |
776 | return -1; |
777 | ||
e35f7362 | 778 | ret = machine__cache_build_ids(&session->machines.host); |
e195fac8 NK |
779 | |
780 | for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) { | |
781 | struct machine *pos = rb_entry(nd, struct machine, rb_node); | |
e35f7362 | 782 | ret |= machine__cache_build_ids(pos); |
e195fac8 NK |
783 | } |
784 | return ret ? -1 : 0; | |
785 | } | |
786 | ||
787 | static bool machine__read_build_ids(struct machine *machine, bool with_hits) | |
788 | { | |
3d39ac53 | 789 | return __dsos__read_build_ids(&machine->dsos.head, with_hits); |
e195fac8 NK |
790 | } |
791 | ||
792 | bool perf_session__read_build_ids(struct perf_session *session, bool with_hits) | |
793 | { | |
794 | struct rb_node *nd; | |
795 | bool ret = machine__read_build_ids(&session->machines.host, with_hits); | |
796 | ||
797 | for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) { | |
798 | struct machine *pos = rb_entry(nd, struct machine, rb_node); | |
799 | ret |= machine__read_build_ids(pos, with_hits); | |
800 | } | |
801 | ||
802 | return ret; | |
803 | } |