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10#include "util.h"
11#include <dirent.h>
12#include <errno.h>
13#include <stdio.h>
14#include <sys/stat.h>
15#include <sys/types.h>
16#include "build-id.h"
17#include "event.h"
18#include "symbol.h"
19#include "thread.h"
20#include <linux/kernel.h>
21#include "debug.h"
22#include "session.h"
23#include "tool.h"
24#include "header.h"
25#include "vdso.h"
26#include "path.h"
27#include "probe-file.h"
28#include "strlist.h"
29
30#include "sane_ctype.h"
31
32static bool no_buildid_cache;
33
34int build_id__mark_dso_hit(struct perf_tool *tool __maybe_unused,
35 union perf_event *event,
36 struct perf_sample *sample,
37 struct perf_evsel *evsel __maybe_unused,
38 struct machine *machine)
39{
40 struct addr_location al;
41 struct thread *thread = machine__findnew_thread(machine, sample->pid,
42 sample->tid);
43
44 if (thread == NULL) {
45 pr_err("problem processing %d event, skipping it.\n",
46 event->header.type);
47 return -1;
48 }
49
50 if (thread__find_map(thread, sample->cpumode, sample->ip, &al))
51 al.map->dso->hit = 1;
52
53 thread__put(thread);
54 return 0;
55}
56
57static int perf_event__exit_del_thread(struct perf_tool *tool __maybe_unused,
58 union perf_event *event,
59 struct perf_sample *sample
60 __maybe_unused,
61 struct machine *machine)
62{
63 struct thread *thread = machine__findnew_thread(machine,
64 event->fork.pid,
65 event->fork.tid);
66
67 dump_printf("(%d:%d):(%d:%d)\n", event->fork.pid, event->fork.tid,
68 event->fork.ppid, event->fork.ptid);
69
70 if (thread) {
71 machine__remove_thread(machine, thread);
72 thread__put(thread);
73 }
74
75 return 0;
76}
77
78struct perf_tool build_id__mark_dso_hit_ops = {
79 .sample = build_id__mark_dso_hit,
80 .mmap = perf_event__process_mmap,
81 .mmap2 = perf_event__process_mmap2,
82 .fork = perf_event__process_fork,
83 .exit = perf_event__exit_del_thread,
84 .attr = perf_event__process_attr,
85 .build_id = perf_event__process_build_id,
86 .ordered_events = true,
87};
88
89int build_id__sprintf(const u8 *build_id, int len, char *bf)
90{
91 char *bid = bf;
92 const u8 *raw = build_id;
93 int i;
94
95 for (i = 0; i < len; ++i) {
96 sprintf(bid, "%02x", *raw);
97 ++raw;
98 bid += 2;
99 }
100
101 return (bid - bf) + 1;
102}
103
104int sysfs__sprintf_build_id(const char *root_dir, char *sbuild_id)
105{
106 char notes[PATH_MAX];
107 u8 build_id[BUILD_ID_SIZE];
108 int ret;
109
110 if (!root_dir)
111 root_dir = "";
112
113 scnprintf(notes, sizeof(notes), "%s/sys/kernel/notes", root_dir);
114
115 ret = sysfs__read_build_id(notes, build_id, sizeof(build_id));
116 if (ret < 0)
117 return ret;
118
119 return build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
120}
121
122int filename__sprintf_build_id(const char *pathname, char *sbuild_id)
123{
124 u8 build_id[BUILD_ID_SIZE];
125 int ret;
126
127 ret = filename__read_build_id(pathname, build_id, sizeof(build_id));
128 if (ret < 0)
129 return ret;
130 else if (ret != sizeof(build_id))
131 return -EINVAL;
132
133 return build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
134}
135
136
137static int asnprintf(char **strp, size_t size, const char *fmt, ...)
138{
139 va_list ap;
140 int ret;
141
142 if (!strp)
143 return -EINVAL;
144
145 va_start(ap, fmt);
146 if (*strp)
147 ret = vsnprintf(*strp, size, fmt, ap);
148 else
149 ret = vasprintf(strp, fmt, ap);
150 va_end(ap);
151
152 return ret;
153}
154
155char *build_id_cache__kallsyms_path(const char *sbuild_id, char *bf,
156 size_t size)
157{
158 bool retry_old = true;
159
160 snprintf(bf, size, "%s/%s/%s/kallsyms",
161 buildid_dir, DSO__NAME_KALLSYMS, sbuild_id);
162retry:
163 if (!access(bf, F_OK))
164 return bf;
165 if (retry_old) {
166
167 snprintf(bf, size, "%s/%s/%s",
168 buildid_dir, DSO__NAME_KALLSYMS, sbuild_id);
169 retry_old = false;
170 goto retry;
171 }
172
173 return NULL;
174}
175
176char *build_id_cache__linkname(const char *sbuild_id, char *bf, size_t size)
177{
178 char *tmp = bf;
179 int ret = asnprintf(&bf, size, "%s/.build-id/%.2s/%s", buildid_dir,
180 sbuild_id, sbuild_id + 2);
181 if (ret < 0 || (tmp && size < (unsigned int)ret))
182 return NULL;
183 return bf;
184}
185
186char *build_id_cache__origname(const char *sbuild_id)
187{
188 char *linkname;
189 char buf[PATH_MAX];
190 char *ret = NULL, *p;
191 size_t offs = 5;
192 ssize_t len;
193
194 linkname = build_id_cache__linkname(sbuild_id, NULL, 0);
195 if (!linkname)
196 return NULL;
197
198 len = readlink(linkname, buf, sizeof(buf) - 1);
199 if (len <= 0)
200 goto out;
201 buf[len] = '\0';
202
203
204 p = strrchr(buf, '/');
205 if (p && (p > buf + offs)) {
206 *p = '\0';
207 if (buf[offs + 1] == '[')
208 offs++;
209
210
211
212
213 ret = strdup(buf + offs);
214 }
215out:
216 free(linkname);
217 return ret;
218}
219
220
221static bool build_id_cache__valid_id(char *sbuild_id)
222{
223 char real_sbuild_id[SBUILD_ID_SIZE] = "";
224 char *pathname;
225 int ret = 0;
226 bool result = false;
227
228 pathname = build_id_cache__origname(sbuild_id);
229 if (!pathname)
230 return false;
231
232 if (!strcmp(pathname, DSO__NAME_KALLSYMS))
233 ret = sysfs__sprintf_build_id("/", real_sbuild_id);
234 else if (pathname[0] == '/')
235 ret = filename__sprintf_build_id(pathname, real_sbuild_id);
236 else
237 ret = -EINVAL;
238 if (ret >= 0)
239 result = (strcmp(sbuild_id, real_sbuild_id) == 0);
240 free(pathname);
241
242 return result;
243}
244
245static const char *build_id_cache__basename(bool is_kallsyms, bool is_vdso,
246 bool is_debug)
247{
248 return is_kallsyms ? "kallsyms" : (is_vdso ? "vdso" : (is_debug ?
249 "debug" : "elf"));
250}
251
252char *dso__build_id_filename(const struct dso *dso, char *bf, size_t size,
253 bool is_debug)
254{
255 bool is_kallsyms = dso__is_kallsyms((struct dso *)dso);
256 bool is_vdso = dso__is_vdso((struct dso *)dso);
257 char sbuild_id[SBUILD_ID_SIZE];
258 char *linkname;
259 bool alloc = (bf == NULL);
260 int ret;
261
262 if (!dso->has_build_id)
263 return NULL;
264
265 build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
266 linkname = build_id_cache__linkname(sbuild_id, NULL, 0);
267 if (!linkname)
268 return NULL;
269
270
271 if (is_regular_file(linkname))
272 ret = asnprintf(&bf, size, "%s", linkname);
273 else
274 ret = asnprintf(&bf, size, "%s/%s", linkname,
275 build_id_cache__basename(is_kallsyms, is_vdso,
276 is_debug));
277 if (ret < 0 || (!alloc && size < (unsigned int)ret))
278 bf = NULL;
279 free(linkname);
280
281 return bf;
282}
283
284#define dsos__for_each_with_build_id(pos, head) \
285 list_for_each_entry(pos, head, node) \
286 if (!pos->has_build_id) \
287 continue; \
288 else
289
290static int write_buildid(const char *name, size_t name_len, u8 *build_id,
291 pid_t pid, u16 misc, struct feat_fd *fd)
292{
293 int err;
294 struct build_id_event b;
295 size_t len;
296
297 len = name_len + 1;
298 len = PERF_ALIGN(len, NAME_ALIGN);
299
300 memset(&b, 0, sizeof(b));
301 memcpy(&b.build_id, build_id, BUILD_ID_SIZE);
302 b.pid = pid;
303 b.header.misc = misc;
304 b.header.size = sizeof(b) + len;
305
306 err = do_write(fd, &b, sizeof(b));
307 if (err < 0)
308 return err;
309
310 return write_padded(fd, name, name_len + 1, len);
311}
312
313static int machine__write_buildid_table(struct machine *machine,
314 struct feat_fd *fd)
315{
316 int err = 0;
317 struct dso *pos;
318 u16 kmisc = PERF_RECORD_MISC_KERNEL,
319 umisc = PERF_RECORD_MISC_USER;
320
321 if (!machine__is_host(machine)) {
322 kmisc = PERF_RECORD_MISC_GUEST_KERNEL;
323 umisc = PERF_RECORD_MISC_GUEST_USER;
324 }
325
326 dsos__for_each_with_build_id(pos, &machine->dsos.head) {
327 const char *name;
328 size_t name_len;
329 bool in_kernel = false;
330
331 if (!pos->hit && !dso__is_vdso(pos))
332 continue;
333
334 if (dso__is_vdso(pos)) {
335 name = pos->short_name;
336 name_len = pos->short_name_len;
337 } else if (dso__is_kcore(pos)) {
338 name = machine->mmap_name;
339 name_len = strlen(name);
340 } else {
341 name = pos->long_name;
342 name_len = pos->long_name_len;
343 }
344
345 in_kernel = pos->kernel ||
346 is_kernel_module(name,
347 PERF_RECORD_MISC_CPUMODE_UNKNOWN);
348 err = write_buildid(name, name_len, pos->build_id, machine->pid,
349 in_kernel ? kmisc : umisc, fd);
350 if (err)
351 break;
352 }
353
354 return err;
355}
356
357int perf_session__write_buildid_table(struct perf_session *session,
358 struct feat_fd *fd)
359{
360 struct rb_node *nd;
361 int err = machine__write_buildid_table(&session->machines.host, fd);
362
363 if (err)
364 return err;
365
366 for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) {
367 struct machine *pos = rb_entry(nd, struct machine, rb_node);
368 err = machine__write_buildid_table(pos, fd);
369 if (err)
370 break;
371 }
372 return err;
373}
374
375static int __dsos__hit_all(struct list_head *head)
376{
377 struct dso *pos;
378
379 list_for_each_entry(pos, head, node)
380 pos->hit = true;
381
382 return 0;
383}
384
385static int machine__hit_all_dsos(struct machine *machine)
386{
387 return __dsos__hit_all(&machine->dsos.head);
388}
389
390int dsos__hit_all(struct perf_session *session)
391{
392 struct rb_node *nd;
393 int err;
394
395 err = machine__hit_all_dsos(&session->machines.host);
396 if (err)
397 return err;
398
399 for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) {
400 struct machine *pos = rb_entry(nd, struct machine, rb_node);
401
402 err = machine__hit_all_dsos(pos);
403 if (err)
404 return err;
405 }
406
407 return 0;
408}
409
410void disable_buildid_cache(void)
411{
412 no_buildid_cache = true;
413}
414
415static bool lsdir_bid_head_filter(const char *name __maybe_unused,
416 struct dirent *d)
417{
418 return (strlen(d->d_name) == 2) &&
419 isxdigit(d->d_name[0]) && isxdigit(d->d_name[1]);
420}
421
422static bool lsdir_bid_tail_filter(const char *name __maybe_unused,
423 struct dirent *d)
424{
425 int i = 0;
426 while (isxdigit(d->d_name[i]) && i < SBUILD_ID_SIZE - 3)
427 i++;
428 return (i == SBUILD_ID_SIZE - 3) && (d->d_name[i] == '\0');
429}
430
431struct strlist *build_id_cache__list_all(bool validonly)
432{
433 struct strlist *toplist, *linklist = NULL, *bidlist;
434 struct str_node *nd, *nd2;
435 char *topdir, *linkdir = NULL;
436 char sbuild_id[SBUILD_ID_SIZE];
437
438
439 if (validonly)
440 symbol__init(NULL);
441
442
443 if (asprintf(&topdir, "%s/.build-id/", buildid_dir) < 0)
444 return NULL;
445
446 bidlist = strlist__new(NULL, NULL);
447 if (!bidlist)
448 goto out;
449
450 toplist = lsdir(topdir, lsdir_bid_head_filter);
451 if (!toplist) {
452 pr_debug("Error in lsdir(%s): %d\n", topdir, errno);
453
454 if (errno == ENOENT)
455 goto out;
456 goto err_out;
457 }
458
459 strlist__for_each_entry(nd, toplist) {
460 if (asprintf(&linkdir, "%s/%s", topdir, nd->s) < 0)
461 goto err_out;
462
463 linklist = lsdir(linkdir, lsdir_bid_tail_filter);
464 if (!linklist) {
465 pr_debug("Error in lsdir(%s): %d\n", linkdir, errno);
466 goto err_out;
467 }
468 strlist__for_each_entry(nd2, linklist) {
469 if (snprintf(sbuild_id, SBUILD_ID_SIZE, "%s%s",
470 nd->s, nd2->s) != SBUILD_ID_SIZE - 1)
471 goto err_out;
472 if (validonly && !build_id_cache__valid_id(sbuild_id))
473 continue;
474 if (strlist__add(bidlist, sbuild_id) < 0)
475 goto err_out;
476 }
477 strlist__delete(linklist);
478 zfree(&linkdir);
479 }
480
481out_free:
482 strlist__delete(toplist);
483out:
484 free(topdir);
485
486 return bidlist;
487
488err_out:
489 strlist__delete(linklist);
490 zfree(&linkdir);
491 strlist__delete(bidlist);
492 bidlist = NULL;
493 goto out_free;
494}
495
496static bool str_is_build_id(const char *maybe_sbuild_id, size_t len)
497{
498 size_t i;
499
500 for (i = 0; i < len; i++) {
501 if (!isxdigit(maybe_sbuild_id[i]))
502 return false;
503 }
504 return true;
505}
506
507
508char *build_id_cache__complement(const char *incomplete_sbuild_id)
509{
510 struct strlist *bidlist;
511 struct str_node *nd, *cand = NULL;
512 char *sbuild_id = NULL;
513 size_t len = strlen(incomplete_sbuild_id);
514
515 if (len >= SBUILD_ID_SIZE ||
516 !str_is_build_id(incomplete_sbuild_id, len))
517 return NULL;
518
519 bidlist = build_id_cache__list_all(true);
520 if (!bidlist)
521 return NULL;
522
523 strlist__for_each_entry(nd, bidlist) {
524 if (strncmp(nd->s, incomplete_sbuild_id, len) != 0)
525 continue;
526 if (cand) {
527 cand = NULL;
528 break;
529 }
530 cand = nd;
531 }
532 if (cand)
533 sbuild_id = strdup(cand->s);
534 strlist__delete(bidlist);
535
536 return sbuild_id;
537}
538
539char *build_id_cache__cachedir(const char *sbuild_id, const char *name,
540 struct nsinfo *nsi, bool is_kallsyms,
541 bool is_vdso)
542{
543 char *realname = (char *)name, *filename;
544 bool slash = is_kallsyms || is_vdso;
545
546 if (!slash) {
547 realname = nsinfo__realpath(name, nsi);
548 if (!realname)
549 return NULL;
550 }
551
552 if (asprintf(&filename, "%s%s%s%s%s", buildid_dir, slash ? "/" : "",
553 is_vdso ? DSO__NAME_VDSO : realname,
554 sbuild_id ? "/" : "", sbuild_id ?: "") < 0)
555 filename = NULL;
556
557 if (!slash)
558 free(realname);
559
560 return filename;
561}
562
563int build_id_cache__list_build_ids(const char *pathname, struct nsinfo *nsi,
564 struct strlist **result)
565{
566 char *dir_name;
567 int ret = 0;
568
569 dir_name = build_id_cache__cachedir(NULL, pathname, nsi, false, false);
570 if (!dir_name)
571 return -ENOMEM;
572
573 *result = lsdir(dir_name, lsdir_no_dot_filter);
574 if (!*result)
575 ret = -errno;
576 free(dir_name);
577
578 return ret;
579}
580
581#if defined(HAVE_LIBELF_SUPPORT) && defined(HAVE_GELF_GETNOTE_SUPPORT)
582static int build_id_cache__add_sdt_cache(const char *sbuild_id,
583 const char *realname,
584 struct nsinfo *nsi)
585{
586 struct probe_cache *cache;
587 int ret;
588 struct nscookie nsc;
589
590 cache = probe_cache__new(sbuild_id, nsi);
591 if (!cache)
592 return -1;
593
594 nsinfo__mountns_enter(nsi, &nsc);
595 ret = probe_cache__scan_sdt(cache, realname);
596 nsinfo__mountns_exit(&nsc);
597 if (ret >= 0) {
598 pr_debug4("Found %d SDTs in %s\n", ret, realname);
599 if (probe_cache__commit(cache) < 0)
600 ret = -1;
601 }
602 probe_cache__delete(cache);
603 return ret;
604}
605#else
606#define build_id_cache__add_sdt_cache(sbuild_id, realname, nsi) (0)
607#endif
608
609static char *build_id_cache__find_debug(const char *sbuild_id,
610 struct nsinfo *nsi)
611{
612 char *realname = NULL;
613 char *debugfile;
614 struct nscookie nsc;
615 size_t len = 0;
616
617 debugfile = calloc(1, PATH_MAX);
618 if (!debugfile)
619 goto out;
620
621 len = __symbol__join_symfs(debugfile, PATH_MAX,
622 "/usr/lib/debug/.build-id/");
623 snprintf(debugfile + len, PATH_MAX - len, "%.2s/%s.debug", sbuild_id,
624 sbuild_id + 2);
625
626 nsinfo__mountns_enter(nsi, &nsc);
627 realname = realpath(debugfile, NULL);
628 if (realname && access(realname, R_OK))
629 zfree(&realname);
630 nsinfo__mountns_exit(&nsc);
631out:
632 free(debugfile);
633 return realname;
634}
635
636int build_id_cache__add_s(const char *sbuild_id, const char *name,
637 struct nsinfo *nsi, bool is_kallsyms, bool is_vdso)
638{
639 const size_t size = PATH_MAX;
640 char *realname = NULL, *filename = NULL, *dir_name = NULL,
641 *linkname = zalloc(size), *tmp;
642 char *debugfile = NULL;
643 int err = -1;
644
645 if (!is_kallsyms) {
646 if (!is_vdso)
647 realname = nsinfo__realpath(name, nsi);
648 else
649 realname = realpath(name, NULL);
650 if (!realname)
651 goto out_free;
652 }
653
654 dir_name = build_id_cache__cachedir(sbuild_id, name, nsi, is_kallsyms,
655 is_vdso);
656 if (!dir_name)
657 goto out_free;
658
659
660 if (is_regular_file(dir_name))
661 if (unlink(dir_name))
662 goto out_free;
663
664 if (mkdir_p(dir_name, 0755))
665 goto out_free;
666
667
668 if (asprintf(&filename, "%s/%s", dir_name,
669 build_id_cache__basename(is_kallsyms, is_vdso,
670 false)) < 0) {
671 filename = NULL;
672 goto out_free;
673 }
674
675 if (access(filename, F_OK)) {
676 if (is_kallsyms) {
677 if (copyfile("/proc/kallsyms", filename))
678 goto out_free;
679 } else if (nsi && nsi->need_setns) {
680 if (copyfile_ns(name, filename, nsi))
681 goto out_free;
682 } else if (link(realname, filename) && errno != EEXIST &&
683 copyfile(name, filename))
684 goto out_free;
685 }
686
687
688
689
690
691
692 if (!is_kallsyms && !is_vdso &&
693 strncmp(".ko", name + strlen(name) - 3, 3)) {
694 debugfile = build_id_cache__find_debug(sbuild_id, nsi);
695 if (debugfile) {
696 zfree(&filename);
697 if (asprintf(&filename, "%s/%s", dir_name,
698 build_id_cache__basename(false, false, true)) < 0) {
699 filename = NULL;
700 goto out_free;
701 }
702 if (access(filename, F_OK)) {
703 if (nsi && nsi->need_setns) {
704 if (copyfile_ns(debugfile, filename,
705 nsi))
706 goto out_free;
707 } else if (link(debugfile, filename) &&
708 errno != EEXIST &&
709 copyfile(debugfile, filename))
710 goto out_free;
711 }
712 }
713 }
714
715 if (!build_id_cache__linkname(sbuild_id, linkname, size))
716 goto out_free;
717 tmp = strrchr(linkname, '/');
718 *tmp = '\0';
719
720 if (access(linkname, X_OK) && mkdir_p(linkname, 0755))
721 goto out_free;
722
723 *tmp = '/';
724 tmp = dir_name + strlen(buildid_dir) - 5;
725 memcpy(tmp, "../..", 5);
726
727 if (symlink(tmp, linkname) == 0)
728 err = 0;
729
730
731 if (realname &&
732 build_id_cache__add_sdt_cache(sbuild_id, realname, nsi) < 0)
733 pr_debug4("Failed to update/scan SDT cache for %s\n", realname);
734
735out_free:
736 if (!is_kallsyms)
737 free(realname);
738 free(filename);
739 free(debugfile);
740 free(dir_name);
741 free(linkname);
742 return err;
743}
744
745static int build_id_cache__add_b(const u8 *build_id, size_t build_id_size,
746 const char *name, struct nsinfo *nsi,
747 bool is_kallsyms, bool is_vdso)
748{
749 char sbuild_id[SBUILD_ID_SIZE];
750
751 build_id__sprintf(build_id, build_id_size, sbuild_id);
752
753 return build_id_cache__add_s(sbuild_id, name, nsi, is_kallsyms,
754 is_vdso);
755}
756
757bool build_id_cache__cached(const char *sbuild_id)
758{
759 bool ret = false;
760 char *filename = build_id_cache__linkname(sbuild_id, NULL, 0);
761
762 if (filename && !access(filename, F_OK))
763 ret = true;
764 free(filename);
765
766 return ret;
767}
768
769int build_id_cache__remove_s(const char *sbuild_id)
770{
771 const size_t size = PATH_MAX;
772 char *filename = zalloc(size),
773 *linkname = zalloc(size), *tmp;
774 int err = -1;
775
776 if (filename == NULL || linkname == NULL)
777 goto out_free;
778
779 if (!build_id_cache__linkname(sbuild_id, linkname, size))
780 goto out_free;
781
782 if (access(linkname, F_OK))
783 goto out_free;
784
785 if (readlink(linkname, filename, size - 1) < 0)
786 goto out_free;
787
788 if (unlink(linkname))
789 goto out_free;
790
791
792
793
794 tmp = strrchr(linkname, '/') + 1;
795 snprintf(tmp, size - (tmp - linkname), "%s", filename);
796
797 if (rm_rf(linkname))
798 goto out_free;
799
800 err = 0;
801out_free:
802 free(filename);
803 free(linkname);
804 return err;
805}
806
807static int dso__cache_build_id(struct dso *dso, struct machine *machine)
808{
809 bool is_kallsyms = dso__is_kallsyms(dso);
810 bool is_vdso = dso__is_vdso(dso);
811 const char *name = dso->long_name;
812
813 if (dso__is_kcore(dso)) {
814 is_kallsyms = true;
815 name = machine->mmap_name;
816 }
817 return build_id_cache__add_b(dso->build_id, sizeof(dso->build_id), name,
818 dso->nsinfo, is_kallsyms, is_vdso);
819}
820
821static int __dsos__cache_build_ids(struct list_head *head,
822 struct machine *machine)
823{
824 struct dso *pos;
825 int err = 0;
826
827 dsos__for_each_with_build_id(pos, head)
828 if (dso__cache_build_id(pos, machine))
829 err = -1;
830
831 return err;
832}
833
834static int machine__cache_build_ids(struct machine *machine)
835{
836 return __dsos__cache_build_ids(&machine->dsos.head, machine);
837}
838
839int perf_session__cache_build_ids(struct perf_session *session)
840{
841 struct rb_node *nd;
842 int ret;
843
844 if (no_buildid_cache)
845 return 0;
846
847 if (mkdir(buildid_dir, 0755) != 0 && errno != EEXIST)
848 return -1;
849
850 ret = machine__cache_build_ids(&session->machines.host);
851
852 for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) {
853 struct machine *pos = rb_entry(nd, struct machine, rb_node);
854 ret |= machine__cache_build_ids(pos);
855 }
856 return ret ? -1 : 0;
857}
858
859static bool machine__read_build_ids(struct machine *machine, bool with_hits)
860{
861 return __dsos__read_build_ids(&machine->dsos.head, with_hits);
862}
863
864bool perf_session__read_build_ids(struct perf_session *session, bool with_hits)
865{
866 struct rb_node *nd;
867 bool ret = machine__read_build_ids(&session->machines.host, with_hits);
868
869 for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) {
870 struct machine *pos = rb_entry(nd, struct machine, rb_node);
871 ret |= machine__read_build_ids(pos, with_hits);
872 }
873
874 return ret;
875}
876
