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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 thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->ip, &al);
51
52 if (al.map != NULL)
53 al.map->dso->hit = 1;
54
55 thread__put(thread);
56 return 0;
57}
58
59static int perf_event__exit_del_thread(struct perf_tool *tool __maybe_unused,
60 union perf_event *event,
61 struct perf_sample *sample
62 __maybe_unused,
63 struct machine *machine)
64{
65 struct thread *thread = machine__findnew_thread(machine,
66 event->fork.pid,
67 event->fork.tid);
68
69 dump_printf("(%d:%d):(%d:%d)\n", event->fork.pid, event->fork.tid,
70 event->fork.ppid, event->fork.ptid);
71
72 if (thread) {
73 machine__remove_thread(machine, thread);
74 thread__put(thread);
75 }
76
77 return 0;
78}
79
80struct perf_tool build_id__mark_dso_hit_ops = {
81 .sample = build_id__mark_dso_hit,
82 .mmap = perf_event__process_mmap,
83 .mmap2 = perf_event__process_mmap2,
84 .fork = perf_event__process_fork,
85 .exit = perf_event__exit_del_thread,
86 .attr = perf_event__process_attr,
87 .build_id = perf_event__process_build_id,
88 .ordered_events = true,
89};
90
91int build_id__sprintf(const u8 *build_id, int len, char *bf)
92{
93 char *bid = bf;
94 const u8 *raw = build_id;
95 int i;
96
97 for (i = 0; i < len; ++i) {
98 sprintf(bid, "%02x", *raw);
99 ++raw;
100 bid += 2;
101 }
102
103 return (bid - bf) + 1;
104}
105
106int sysfs__sprintf_build_id(const char *root_dir, char *sbuild_id)
107{
108 char notes[PATH_MAX];
109 u8 build_id[BUILD_ID_SIZE];
110 int ret;
111
112 if (!root_dir)
113 root_dir = "";
114
115 scnprintf(notes, sizeof(notes), "%s/sys/kernel/notes", root_dir);
116
117 ret = sysfs__read_build_id(notes, build_id, sizeof(build_id));
118 if (ret < 0)
119 return ret;
120
121 return build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
122}
123
124int filename__sprintf_build_id(const char *pathname, char *sbuild_id)
125{
126 u8 build_id[BUILD_ID_SIZE];
127 int ret;
128
129 ret = filename__read_build_id(pathname, build_id, sizeof(build_id));
130 if (ret < 0)
131 return ret;
132 else if (ret != sizeof(build_id))
133 return -EINVAL;
134
135 return build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
136}
137
138
139static int asnprintf(char **strp, size_t size, const char *fmt, ...)
140{
141 va_list ap;
142 int ret;
143
144 if (!strp)
145 return -EINVAL;
146
147 va_start(ap, fmt);
148 if (*strp)
149 ret = vsnprintf(*strp, size, fmt, ap);
150 else
151 ret = vasprintf(strp, fmt, ap);
152 va_end(ap);
153
154 return ret;
155}
156
157char *build_id_cache__kallsyms_path(const char *sbuild_id, char *bf,
158 size_t size)
159{
160 bool retry_old = true;
161
162 snprintf(bf, size, "%s/%s/%s/kallsyms",
163 buildid_dir, DSO__NAME_KALLSYMS, sbuild_id);
164retry:
165 if (!access(bf, F_OK))
166 return bf;
167 if (retry_old) {
168
169 snprintf(bf, size, "%s/%s/%s",
170 buildid_dir, DSO__NAME_KALLSYMS, sbuild_id);
171 retry_old = false;
172 goto retry;
173 }
174
175 return NULL;
176}
177
178char *build_id_cache__linkname(const char *sbuild_id, char *bf, size_t size)
179{
180 char *tmp = bf;
181 int ret = asnprintf(&bf, size, "%s/.build-id/%.2s/%s", buildid_dir,
182 sbuild_id, sbuild_id + 2);
183 if (ret < 0 || (tmp && size < (unsigned int)ret))
184 return NULL;
185 return bf;
186}
187
188char *build_id_cache__origname(const char *sbuild_id)
189{
190 char *linkname;
191 char buf[PATH_MAX];
192 char *ret = NULL, *p;
193 size_t offs = 5;
194 ssize_t len;
195
196 linkname = build_id_cache__linkname(sbuild_id, NULL, 0);
197 if (!linkname)
198 return NULL;
199
200 len = readlink(linkname, buf, sizeof(buf) - 1);
201 if (len <= 0)
202 goto out;
203 buf[len] = '\0';
204
205
206 p = strrchr(buf, '/');
207 if (p && (p > buf + offs)) {
208 *p = '\0';
209 if (buf[offs + 1] == '[')
210 offs++;
211
212
213
214
215 ret = strdup(buf + offs);
216 }
217out:
218 free(linkname);
219 return ret;
220}
221
222
223static bool build_id_cache__valid_id(char *sbuild_id)
224{
225 char real_sbuild_id[SBUILD_ID_SIZE] = "";
226 char *pathname;
227 int ret = 0;
228 bool result = false;
229
230 pathname = build_id_cache__origname(sbuild_id);
231 if (!pathname)
232 return false;
233
234 if (!strcmp(pathname, DSO__NAME_KALLSYMS))
235 ret = sysfs__sprintf_build_id("/", real_sbuild_id);
236 else if (pathname[0] == '/')
237 ret = filename__sprintf_build_id(pathname, real_sbuild_id);
238 else
239 ret = -EINVAL;
240 if (ret >= 0)
241 result = (strcmp(sbuild_id, real_sbuild_id) == 0);
242 free(pathname);
243
244 return result;
245}
246
247static const char *build_id_cache__basename(bool is_kallsyms, bool is_vdso,
248 bool is_debug)
249{
250 return is_kallsyms ? "kallsyms" : (is_vdso ? "vdso" : (is_debug ?
251 "debug" : "elf"));
252}
253
254char *dso__build_id_filename(const struct dso *dso, char *bf, size_t size,
255 bool is_debug)
256{
257 bool is_kallsyms = dso__is_kallsyms((struct dso *)dso);
258 bool is_vdso = dso__is_vdso((struct dso *)dso);
259 char sbuild_id[SBUILD_ID_SIZE];
260 char *linkname;
261 bool alloc = (bf == NULL);
262 int ret;
263
264 if (!dso->has_build_id)
265 return NULL;
266
267 build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
268 linkname = build_id_cache__linkname(sbuild_id, NULL, 0);
269 if (!linkname)
270 return NULL;
271
272
273 if (is_regular_file(linkname))
274 ret = asnprintf(&bf, size, "%s", linkname);
275 else
276 ret = asnprintf(&bf, size, "%s/%s", linkname,
277 build_id_cache__basename(is_kallsyms, is_vdso,
278 is_debug));
279 if (ret < 0 || (!alloc && size < (unsigned int)ret))
280 bf = NULL;
281 free(linkname);
282
283 return bf;
284}
285
286#define dsos__for_each_with_build_id(pos, head) \
287 list_for_each_entry(pos, head, node) \
288 if (!pos->has_build_id) \
289 continue; \
290 else
291
292static int write_buildid(const char *name, size_t name_len, u8 *build_id,
293 pid_t pid, u16 misc, struct feat_fd *fd)
294{
295 int err;
296 struct build_id_event b;
297 size_t len;
298
299 len = name_len + 1;
300 len = PERF_ALIGN(len, NAME_ALIGN);
301
302 memset(&b, 0, sizeof(b));
303 memcpy(&b.build_id, build_id, BUILD_ID_SIZE);
304 b.pid = pid;
305 b.header.misc = misc;
306 b.header.size = sizeof(b) + len;
307
308 err = do_write(fd, &b, sizeof(b));
309 if (err < 0)
310 return err;
311
312 return write_padded(fd, name, name_len + 1, len);
313}
314
315static int machine__write_buildid_table(struct machine *machine,
316 struct feat_fd *fd)
317{
318 int err = 0;
319 char nm[PATH_MAX];
320 struct dso *pos;
321 u16 kmisc = PERF_RECORD_MISC_KERNEL,
322 umisc = PERF_RECORD_MISC_USER;
323
324 if (!machine__is_host(machine)) {
325 kmisc = PERF_RECORD_MISC_GUEST_KERNEL;
326 umisc = PERF_RECORD_MISC_GUEST_USER;
327 }
328
329 dsos__for_each_with_build_id(pos, &machine->dsos.head) {
330 const char *name;
331 size_t name_len;
332 bool in_kernel = false;
333
334 if (!pos->hit && !dso__is_vdso(pos))
335 continue;
336
337 if (dso__is_vdso(pos)) {
338 name = pos->short_name;
339 name_len = pos->short_name_len;
340 } else if (dso__is_kcore(pos)) {
341 machine__mmap_name(machine, nm, sizeof(nm));
342 name = nm;
343 name_len = strlen(nm);
344 } else {
345 name = pos->long_name;
346 name_len = pos->long_name_len;
347 }
348
349 in_kernel = pos->kernel ||
350 is_kernel_module(name,
351 PERF_RECORD_MISC_CPUMODE_UNKNOWN);
352 err = write_buildid(name, name_len, pos->build_id, machine->pid,
353 in_kernel ? kmisc : umisc, fd);
354 if (err)
355 break;
356 }
357
358 return err;
359}
360
361int perf_session__write_buildid_table(struct perf_session *session,
362 struct feat_fd *fd)
363{
364 struct rb_node *nd;
365 int err = machine__write_buildid_table(&session->machines.host, fd);
366
367 if (err)
368 return err;
369
370 for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) {
371 struct machine *pos = rb_entry(nd, struct machine, rb_node);
372 err = machine__write_buildid_table(pos, fd);
373 if (err)
374 break;
375 }
376 return err;
377}
378
379static int __dsos__hit_all(struct list_head *head)
380{
381 struct dso *pos;
382
383 list_for_each_entry(pos, head, node)
384 pos->hit = true;
385
386 return 0;
387}
388
389static int machine__hit_all_dsos(struct machine *machine)
390{
391 return __dsos__hit_all(&machine->dsos.head);
392}
393
394int dsos__hit_all(struct perf_session *session)
395{
396 struct rb_node *nd;
397 int err;
398
399 err = machine__hit_all_dsos(&session->machines.host);
400 if (err)
401 return err;
402
403 for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) {
404 struct machine *pos = rb_entry(nd, struct machine, rb_node);
405
406 err = machine__hit_all_dsos(pos);
407 if (err)
408 return err;
409 }
410
411 return 0;
412}
413
414void disable_buildid_cache(void)
415{
416 no_buildid_cache = true;
417}
418
419static bool lsdir_bid_head_filter(const char *name __maybe_unused,
420 struct dirent *d)
421{
422 return (strlen(d->d_name) == 2) &&
423 isxdigit(d->d_name[0]) && isxdigit(d->d_name[1]);
424}
425
426static bool lsdir_bid_tail_filter(const char *name __maybe_unused,
427 struct dirent *d)
428{
429 int i = 0;
430 while (isxdigit(d->d_name[i]) && i < SBUILD_ID_SIZE - 3)
431 i++;
432 return (i == SBUILD_ID_SIZE - 3) && (d->d_name[i] == '\0');
433}
434
435struct strlist *build_id_cache__list_all(bool validonly)
436{
437 struct strlist *toplist, *linklist = NULL, *bidlist;
438 struct str_node *nd, *nd2;
439 char *topdir, *linkdir = NULL;
440 char sbuild_id[SBUILD_ID_SIZE];
441
442
443 if (validonly)
444 symbol__init(NULL);
445
446
447 if (asprintf(&topdir, "%s/.build-id/", buildid_dir) < 0)
448 return NULL;
449
450 bidlist = strlist__new(NULL, NULL);
451 if (!bidlist)
452 goto out;
453
454 toplist = lsdir(topdir, lsdir_bid_head_filter);
455 if (!toplist) {
456 pr_debug("Error in lsdir(%s): %d\n", topdir, errno);
457
458 if (errno == ENOENT)
459 goto out;
460 goto err_out;
461 }
462
463 strlist__for_each_entry(nd, toplist) {
464 if (asprintf(&linkdir, "%s/%s", topdir, nd->s) < 0)
465 goto err_out;
466
467 linklist = lsdir(linkdir, lsdir_bid_tail_filter);
468 if (!linklist) {
469 pr_debug("Error in lsdir(%s): %d\n", linkdir, errno);
470 goto err_out;
471 }
472 strlist__for_each_entry(nd2, linklist) {
473 if (snprintf(sbuild_id, SBUILD_ID_SIZE, "%s%s",
474 nd->s, nd2->s) != SBUILD_ID_SIZE - 1)
475 goto err_out;
476 if (validonly && !build_id_cache__valid_id(sbuild_id))
477 continue;
478 if (strlist__add(bidlist, sbuild_id) < 0)
479 goto err_out;
480 }
481 strlist__delete(linklist);
482 zfree(&linkdir);
483 }
484
485out_free:
486 strlist__delete(toplist);
487out:
488 free(topdir);
489
490 return bidlist;
491
492err_out:
493 strlist__delete(linklist);
494 zfree(&linkdir);
495 strlist__delete(bidlist);
496 bidlist = NULL;
497 goto out_free;
498}
499
500static bool str_is_build_id(const char *maybe_sbuild_id, size_t len)
501{
502 size_t i;
503
504 for (i = 0; i < len; i++) {
505 if (!isxdigit(maybe_sbuild_id[i]))
506 return false;
507 }
508 return true;
509}
510
511
512char *build_id_cache__complement(const char *incomplete_sbuild_id)
513{
514 struct strlist *bidlist;
515 struct str_node *nd, *cand = NULL;
516 char *sbuild_id = NULL;
517 size_t len = strlen(incomplete_sbuild_id);
518
519 if (len >= SBUILD_ID_SIZE ||
520 !str_is_build_id(incomplete_sbuild_id, len))
521 return NULL;
522
523 bidlist = build_id_cache__list_all(true);
524 if (!bidlist)
525 return NULL;
526
527 strlist__for_each_entry(nd, bidlist) {
528 if (strncmp(nd->s, incomplete_sbuild_id, len) != 0)
529 continue;
530 if (cand) {
531 cand = NULL;
532 break;
533 }
534 cand = nd;
535 }
536 if (cand)
537 sbuild_id = strdup(cand->s);
538 strlist__delete(bidlist);
539
540 return sbuild_id;
541}
542
543char *build_id_cache__cachedir(const char *sbuild_id, const char *name,
544 struct nsinfo *nsi, bool is_kallsyms,
545 bool is_vdso)
546{
547 char *realname = (char *)name, *filename;
548 bool slash = is_kallsyms || is_vdso;
549
550 if (!slash) {
551 realname = nsinfo__realpath(name, nsi);
552 if (!realname)
553 return NULL;
554 }
555
556 if (asprintf(&filename, "%s%s%s%s%s", buildid_dir, slash ? "/" : "",
557 is_vdso ? DSO__NAME_VDSO : realname,
558 sbuild_id ? "/" : "", sbuild_id ?: "") < 0)
559 filename = NULL;
560
561 if (!slash)
562 free(realname);
563
564 return filename;
565}
566
567int build_id_cache__list_build_ids(const char *pathname, struct nsinfo *nsi,
568 struct strlist **result)
569{
570 char *dir_name;
571 int ret = 0;
572
573 dir_name = build_id_cache__cachedir(NULL, pathname, nsi, false, false);
574 if (!dir_name)
575 return -ENOMEM;
576
577 *result = lsdir(dir_name, lsdir_no_dot_filter);
578 if (!*result)
579 ret = -errno;
580 free(dir_name);
581
582 return ret;
583}
584
585#if defined(HAVE_LIBELF_SUPPORT) && defined(HAVE_GELF_GETNOTE_SUPPORT)
586static int build_id_cache__add_sdt_cache(const char *sbuild_id,
587 const char *realname,
588 struct nsinfo *nsi)
589{
590 struct probe_cache *cache;
591 int ret;
592 struct nscookie nsc;
593
594 cache = probe_cache__new(sbuild_id, nsi);
595 if (!cache)
596 return -1;
597
598 nsinfo__mountns_enter(nsi, &nsc);
599 ret = probe_cache__scan_sdt(cache, realname);
600 nsinfo__mountns_exit(&nsc);
601 if (ret >= 0) {
602 pr_debug4("Found %d SDTs in %s\n", ret, realname);
603 if (probe_cache__commit(cache) < 0)
604 ret = -1;
605 }
606 probe_cache__delete(cache);
607 return ret;
608}
609#else
610#define build_id_cache__add_sdt_cache(sbuild_id, realname, nsi) (0)
611#endif
612
613static char *build_id_cache__find_debug(const char *sbuild_id,
614 struct nsinfo *nsi)
615{
616 char *realname = NULL;
617 char *debugfile;
618 struct nscookie nsc;
619 size_t len = 0;
620
621 debugfile = calloc(1, PATH_MAX);
622 if (!debugfile)
623 goto out;
624
625 len = __symbol__join_symfs(debugfile, PATH_MAX,
626 "/usr/lib/debug/.build-id/");
627 snprintf(debugfile + len, PATH_MAX - len, "%.2s/%s.debug", sbuild_id,
628 sbuild_id + 2);
629
630 nsinfo__mountns_enter(nsi, &nsc);
631 realname = realpath(debugfile, NULL);
632 if (realname && access(realname, R_OK))
633 zfree(&realname);
634 nsinfo__mountns_exit(&nsc);
635out:
636 free(debugfile);
637 return realname;
638}
639
640int build_id_cache__add_s(const char *sbuild_id, const char *name,
641 struct nsinfo *nsi, bool is_kallsyms, bool is_vdso)
642{
643 const size_t size = PATH_MAX;
644 char *realname = NULL, *filename = NULL, *dir_name = NULL,
645 *linkname = zalloc(size), *tmp;
646 char *debugfile = NULL;
647 int err = -1;
648
649 if (!is_kallsyms) {
650 if (!is_vdso)
651 realname = nsinfo__realpath(name, nsi);
652 else
653 realname = realpath(name, NULL);
654 if (!realname)
655 goto out_free;
656 }
657
658 dir_name = build_id_cache__cachedir(sbuild_id, name, nsi, is_kallsyms,
659 is_vdso);
660 if (!dir_name)
661 goto out_free;
662
663
664 if (is_regular_file(dir_name))
665 if (unlink(dir_name))
666 goto out_free;
667
668 if (mkdir_p(dir_name, 0755))
669 goto out_free;
670
671
672 if (asprintf(&filename, "%s/%s", dir_name,
673 build_id_cache__basename(is_kallsyms, is_vdso,
674 false)) < 0) {
675 filename = NULL;
676 goto out_free;
677 }
678
679 if (access(filename, F_OK)) {
680 if (is_kallsyms) {
681 if (copyfile("/proc/kallsyms", filename))
682 goto out_free;
683 } else if (nsi && nsi->need_setns) {
684 if (copyfile_ns(name, filename, nsi))
685 goto out_free;
686 } else if (link(realname, filename) && errno != EEXIST &&
687 copyfile(name, filename))
688 goto out_free;
689 }
690
691
692
693
694
695
696 if (!is_kallsyms && !is_vdso &&
697 strncmp(".ko", name + strlen(name) - 3, 3)) {
698 debugfile = build_id_cache__find_debug(sbuild_id, nsi);
699 if (debugfile) {
700 zfree(&filename);
701 if (asprintf(&filename, "%s/%s", dir_name,
702 build_id_cache__basename(false, false, true)) < 0) {
703 filename = NULL;
704 goto out_free;
705 }
706 if (access(filename, F_OK)) {
707 if (nsi && nsi->need_setns) {
708 if (copyfile_ns(debugfile, filename,
709 nsi))
710 goto out_free;
711 } else if (link(debugfile, filename) &&
712 errno != EEXIST &&
713 copyfile(debugfile, filename))
714 goto out_free;
715 }
716 }
717 }
718
719 if (!build_id_cache__linkname(sbuild_id, linkname, size))
720 goto out_free;
721 tmp = strrchr(linkname, '/');
722 *tmp = '\0';
723
724 if (access(linkname, X_OK) && mkdir_p(linkname, 0755))
725 goto out_free;
726
727 *tmp = '/';
728 tmp = dir_name + strlen(buildid_dir) - 5;
729 memcpy(tmp, "../..", 5);
730
731 if (symlink(tmp, linkname) == 0)
732 err = 0;
733
734
735 if (realname &&
736 build_id_cache__add_sdt_cache(sbuild_id, realname, nsi) < 0)
737 pr_debug4("Failed to update/scan SDT cache for %s\n", realname);
738
739out_free:
740 if (!is_kallsyms)
741 free(realname);
742 free(filename);
743 free(debugfile);
744 free(dir_name);
745 free(linkname);
746 return err;
747}
748
749static int build_id_cache__add_b(const u8 *build_id, size_t build_id_size,
750 const char *name, struct nsinfo *nsi,
751 bool is_kallsyms, bool is_vdso)
752{
753 char sbuild_id[SBUILD_ID_SIZE];
754
755 build_id__sprintf(build_id, build_id_size, sbuild_id);
756
757 return build_id_cache__add_s(sbuild_id, name, nsi, is_kallsyms,
758 is_vdso);
759}
760
761bool build_id_cache__cached(const char *sbuild_id)
762{
763 bool ret = false;
764 char *filename = build_id_cache__linkname(sbuild_id, NULL, 0);
765
766 if (filename && !access(filename, F_OK))
767 ret = true;
768 free(filename);
769
770 return ret;
771}
772
773int build_id_cache__remove_s(const char *sbuild_id)
774{
775 const size_t size = PATH_MAX;
776 char *filename = zalloc(size),
777 *linkname = zalloc(size), *tmp;
778 int err = -1;
779
780 if (filename == NULL || linkname == NULL)
781 goto out_free;
782
783 if (!build_id_cache__linkname(sbuild_id, linkname, size))
784 goto out_free;
785
786 if (access(linkname, F_OK))
787 goto out_free;
788
789 if (readlink(linkname, filename, size - 1) < 0)
790 goto out_free;
791
792 if (unlink(linkname))
793 goto out_free;
794
795
796
797
798 tmp = strrchr(linkname, '/') + 1;
799 snprintf(tmp, size - (tmp - linkname), "%s", filename);
800
801 if (rm_rf(linkname))
802 goto out_free;
803
804 err = 0;
805out_free:
806 free(filename);
807 free(linkname);
808 return err;
809}
810
811static int dso__cache_build_id(struct dso *dso, struct machine *machine)
812{
813 bool is_kallsyms = dso__is_kallsyms(dso);
814 bool is_vdso = dso__is_vdso(dso);
815 const char *name = dso->long_name;
816 char nm[PATH_MAX];
817
818 if (dso__is_kcore(dso)) {
819 is_kallsyms = true;
820 machine__mmap_name(machine, nm, sizeof(nm));
821 name = nm;
822 }
823 return build_id_cache__add_b(dso->build_id, sizeof(dso->build_id), name,
824 dso->nsinfo, is_kallsyms, is_vdso);
825}
826
827static int __dsos__cache_build_ids(struct list_head *head,
828 struct machine *machine)
829{
830 struct dso *pos;
831 int err = 0;
832
833 dsos__for_each_with_build_id(pos, head)
834 if (dso__cache_build_id(pos, machine))
835 err = -1;
836
837 return err;
838}
839
840static int machine__cache_build_ids(struct machine *machine)
841{
842 return __dsos__cache_build_ids(&machine->dsos.head, machine);
843}
844
845int perf_session__cache_build_ids(struct perf_session *session)
846{
847 struct rb_node *nd;
848 int ret;
849
850 if (no_buildid_cache)
851 return 0;
852
853 if (mkdir(buildid_dir, 0755) != 0 && errno != EEXIST)
854 return -1;
855
856 ret = machine__cache_build_ids(&session->machines.host);
857
858 for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) {
859 struct machine *pos = rb_entry(nd, struct machine, rb_node);
860 ret |= machine__cache_build_ids(pos);
861 }
862 return ret ? -1 : 0;
863}
864
865static bool machine__read_build_ids(struct machine *machine, bool with_hits)
866{
867 return __dsos__read_build_ids(&machine->dsos.head, with_hits);
868}
869
870bool perf_session__read_build_ids(struct perf_session *session, bool with_hits)
871{
872 struct rb_node *nd;
873 bool ret = machine__read_build_ids(&session->machines.host, with_hits);
874
875 for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) {
876 struct machine *pos = rb_entry(nd, struct machine, rb_node);
877 ret |= machine__read_build_ids(pos, with_hits);
878 }
879
880 return ret;
881}
882
