1
2#include <errno.h>
3#include <inttypes.h>
4#include "string2.h"
5#include <sys/param.h>
6#include <sys/types.h>
7#include <byteswap.h>
8#include <unistd.h>
9#include <stdio.h>
10#include <stdlib.h>
11#include <linux/compiler.h>
12#include <linux/list.h>
13#include <linux/kernel.h>
14#include <linux/bitops.h>
15#include <linux/string.h>
16#include <linux/stringify.h>
17#include <linux/zalloc.h>
18#include <sys/stat.h>
19#include <sys/utsname.h>
20#include <linux/time64.h>
21#include <dirent.h>
22#include <bpf/libbpf.h>
23
24#include "evlist.h"
25#include "evsel.h"
26#include "header.h"
27#include "memswap.h"
28#include "../perf.h"
29#include "trace-event.h"
30#include "session.h"
31#include "symbol.h"
32#include "debug.h"
33#include "cpumap.h"
34#include "pmu.h"
35#include "vdso.h"
36#include "strbuf.h"
37#include "build-id.h"
38#include "data.h"
39#include <api/fs/fs.h>
40#include "asm/bug.h"
41#include "tool.h"
42#include "time-utils.h"
43#include "units.h"
44#include "cputopo.h"
45#include "bpf-event.h"
46
47#include <linux/ctype.h>
48
49
50
51
52
53
54
55
56
57
58static const char *__perf_magic1 = "PERFFILE";
59static const u64 __perf_magic2 = 0x32454c4946524550ULL;
60static const u64 __perf_magic2_sw = 0x50455246494c4532ULL;
61
62#define PERF_MAGIC __perf_magic2
63
64const char perf_version_string[] = PERF_VERSION;
65
66struct perf_file_attr {
67 struct perf_event_attr attr;
68 struct perf_file_section ids;
69};
70
71struct feat_fd {
72 struct perf_header *ph;
73 int fd;
74 void *buf;
75 ssize_t offset;
76 size_t size;
77 struct perf_evsel *events;
78};
79
80void perf_header__set_feat(struct perf_header *header, int feat)
81{
82 set_bit(feat, header->adds_features);
83}
84
85void perf_header__clear_feat(struct perf_header *header, int feat)
86{
87 clear_bit(feat, header->adds_features);
88}
89
90bool perf_header__has_feat(const struct perf_header *header, int feat)
91{
92 return test_bit(feat, header->adds_features);
93}
94
95static int __do_write_fd(struct feat_fd *ff, const void *buf, size_t size)
96{
97 ssize_t ret = writen(ff->fd, buf, size);
98
99 if (ret != (ssize_t)size)
100 return ret < 0 ? (int)ret : -1;
101 return 0;
102}
103
104static int __do_write_buf(struct feat_fd *ff, const void *buf, size_t size)
105{
106
107 const size_t max_size = 0xffff - sizeof(struct perf_event_header);
108 size_t new_size = ff->size;
109 void *addr;
110
111 if (size + ff->offset > max_size)
112 return -E2BIG;
113
114 while (size > (new_size - ff->offset))
115 new_size <<= 1;
116 new_size = min(max_size, new_size);
117
118 if (ff->size < new_size) {
119 addr = realloc(ff->buf, new_size);
120 if (!addr)
121 return -ENOMEM;
122 ff->buf = addr;
123 ff->size = new_size;
124 }
125
126 memcpy(ff->buf + ff->offset, buf, size);
127 ff->offset += size;
128
129 return 0;
130}
131
132
133int do_write(struct feat_fd *ff, const void *buf, size_t size)
134{
135 if (!ff->buf)
136 return __do_write_fd(ff, buf, size);
137 return __do_write_buf(ff, buf, size);
138}
139
140
141static int do_write_bitmap(struct feat_fd *ff, unsigned long *set, u64 size)
142{
143 u64 *p = (u64 *) set;
144 int i, ret;
145
146 ret = do_write(ff, &size, sizeof(size));
147 if (ret < 0)
148 return ret;
149
150 for (i = 0; (u64) i < BITS_TO_U64(size); i++) {
151 ret = do_write(ff, p + i, sizeof(*p));
152 if (ret < 0)
153 return ret;
154 }
155
156 return 0;
157}
158
159
160int write_padded(struct feat_fd *ff, const void *bf,
161 size_t count, size_t count_aligned)
162{
163 static const char zero_buf[NAME_ALIGN];
164 int err = do_write(ff, bf, count);
165
166 if (!err)
167 err = do_write(ff, zero_buf, count_aligned - count);
168
169 return err;
170}
171
172#define string_size(str) \
173 (PERF_ALIGN((strlen(str) + 1), NAME_ALIGN) + sizeof(u32))
174
175
176static int do_write_string(struct feat_fd *ff, const char *str)
177{
178 u32 len, olen;
179 int ret;
180
181 olen = strlen(str) + 1;
182 len = PERF_ALIGN(olen, NAME_ALIGN);
183
184
185 ret = do_write(ff, &len, sizeof(len));
186 if (ret < 0)
187 return ret;
188
189 return write_padded(ff, str, olen, len);
190}
191
192static int __do_read_fd(struct feat_fd *ff, void *addr, ssize_t size)
193{
194 ssize_t ret = readn(ff->fd, addr, size);
195
196 if (ret != size)
197 return ret < 0 ? (int)ret : -1;
198 return 0;
199}
200
201static int __do_read_buf(struct feat_fd *ff, void *addr, ssize_t size)
202{
203 if (size > (ssize_t)ff->size - ff->offset)
204 return -1;
205
206 memcpy(addr, ff->buf + ff->offset, size);
207 ff->offset += size;
208
209 return 0;
210
211}
212
213static int __do_read(struct feat_fd *ff, void *addr, ssize_t size)
214{
215 if (!ff->buf)
216 return __do_read_fd(ff, addr, size);
217 return __do_read_buf(ff, addr, size);
218}
219
220static int do_read_u32(struct feat_fd *ff, u32 *addr)
221{
222 int ret;
223
224 ret = __do_read(ff, addr, sizeof(*addr));
225 if (ret)
226 return ret;
227
228 if (ff->ph->needs_swap)
229 *addr = bswap_32(*addr);
230 return 0;
231}
232
233static int do_read_u64(struct feat_fd *ff, u64 *addr)
234{
235 int ret;
236
237 ret = __do_read(ff, addr, sizeof(*addr));
238 if (ret)
239 return ret;
240
241 if (ff->ph->needs_swap)
242 *addr = bswap_64(*addr);
243 return 0;
244}
245
246static char *do_read_string(struct feat_fd *ff)
247{
248 u32 len;
249 char *buf;
250
251 if (do_read_u32(ff, &len))
252 return NULL;
253
254 buf = malloc(len);
255 if (!buf)
256 return NULL;
257
258 if (!__do_read(ff, buf, len)) {
259
260
261
262
263
264 return buf;
265 }
266
267 free(buf);
268 return NULL;
269}
270
271
272static int do_read_bitmap(struct feat_fd *ff, unsigned long **pset, u64 *psize)
273{
274 unsigned long *set;
275 u64 size, *p;
276 int i, ret;
277
278 ret = do_read_u64(ff, &size);
279 if (ret)
280 return ret;
281
282 set = bitmap_alloc(size);
283 if (!set)
284 return -ENOMEM;
285
286 p = (u64 *) set;
287
288 for (i = 0; (u64) i < BITS_TO_U64(size); i++) {
289 ret = do_read_u64(ff, p + i);
290 if (ret < 0) {
291 free(set);
292 return ret;
293 }
294 }
295
296 *pset = set;
297 *psize = size;
298 return 0;
299}
300
301static int write_tracing_data(struct feat_fd *ff,
302 struct perf_evlist *evlist)
303{
304 if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__))
305 return -1;
306
307 return read_tracing_data(ff->fd, &evlist->entries);
308}
309
310static int write_build_id(struct feat_fd *ff,
311 struct perf_evlist *evlist __maybe_unused)
312{
313 struct perf_session *session;
314 int err;
315
316 session = container_of(ff->ph, struct perf_session, header);
317
318 if (!perf_session__read_build_ids(session, true))
319 return -1;
320
321 if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__))
322 return -1;
323
324 err = perf_session__write_buildid_table(session, ff);
325 if (err < 0) {
326 pr_debug("failed to write buildid table\n");
327 return err;
328 }
329 perf_session__cache_build_ids(session);
330
331 return 0;
332}
333
334static int write_hostname(struct feat_fd *ff,
335 struct perf_evlist *evlist __maybe_unused)
336{
337 struct utsname uts;
338 int ret;
339
340 ret = uname(&uts);
341 if (ret < 0)
342 return -1;
343
344 return do_write_string(ff, uts.nodename);
345}
346
347static int write_osrelease(struct feat_fd *ff,
348 struct perf_evlist *evlist __maybe_unused)
349{
350 struct utsname uts;
351 int ret;
352
353 ret = uname(&uts);
354 if (ret < 0)
355 return -1;
356
357 return do_write_string(ff, uts.release);
358}
359
360static int write_arch(struct feat_fd *ff,
361 struct perf_evlist *evlist __maybe_unused)
362{
363 struct utsname uts;
364 int ret;
365
366 ret = uname(&uts);
367 if (ret < 0)
368 return -1;
369
370 return do_write_string(ff, uts.machine);
371}
372
373static int write_version(struct feat_fd *ff,
374 struct perf_evlist *evlist __maybe_unused)
375{
376 return do_write_string(ff, perf_version_string);
377}
378
379static int __write_cpudesc(struct feat_fd *ff, const char *cpuinfo_proc)
380{
381 FILE *file;
382 char *buf = NULL;
383 char *s, *p;
384 const char *search = cpuinfo_proc;
385 size_t len = 0;
386 int ret = -1;
387
388 if (!search)
389 return -1;
390
391 file = fopen("/proc/cpuinfo", "r");
392 if (!file)
393 return -1;
394
395 while (getline(&buf, &len, file) > 0) {
396 ret = strncmp(buf, search, strlen(search));
397 if (!ret)
398 break;
399 }
400
401 if (ret) {
402 ret = -1;
403 goto done;
404 }
405
406 s = buf;
407
408 p = strchr(buf, ':');
409 if (p && *(p+1) == ' ' && *(p+2))
410 s = p + 2;
411 p = strchr(s, '\n');
412 if (p)
413 *p = '\0';
414
415
416 p = s;
417 while (*p) {
418 if (isspace(*p)) {
419 char *r = p + 1;
420 char *q = skip_spaces(r);
421 *p = ' ';
422 if (q != (p+1))
423 while ((*r++ = *q++));
424 }
425 p++;
426 }
427 ret = do_write_string(ff, s);
428done:
429 free(buf);
430 fclose(file);
431 return ret;
432}
433
434static int write_cpudesc(struct feat_fd *ff,
435 struct perf_evlist *evlist __maybe_unused)
436{
437 const char *cpuinfo_procs[] = CPUINFO_PROC;
438 unsigned int i;
439
440 for (i = 0; i < ARRAY_SIZE(cpuinfo_procs); i++) {
441 int ret;
442 ret = __write_cpudesc(ff, cpuinfo_procs[i]);
443 if (ret >= 0)
444 return ret;
445 }
446 return -1;
447}
448
449
450static int write_nrcpus(struct feat_fd *ff,
451 struct perf_evlist *evlist __maybe_unused)
452{
453 long nr;
454 u32 nrc, nra;
455 int ret;
456
457 nrc = cpu__max_present_cpu();
458
459 nr = sysconf(_SC_NPROCESSORS_ONLN);
460 if (nr < 0)
461 return -1;
462
463 nra = (u32)(nr & UINT_MAX);
464
465 ret = do_write(ff, &nrc, sizeof(nrc));
466 if (ret < 0)
467 return ret;
468
469 return do_write(ff, &nra, sizeof(nra));
470}
471
472static int write_event_desc(struct feat_fd *ff,
473 struct perf_evlist *evlist)
474{
475 struct perf_evsel *evsel;
476 u32 nre, nri, sz;
477 int ret;
478
479 nre = evlist->nr_entries;
480
481
482
483
484 ret = do_write(ff, &nre, sizeof(nre));
485 if (ret < 0)
486 return ret;
487
488
489
490
491 sz = (u32)sizeof(evsel->attr);
492 ret = do_write(ff, &sz, sizeof(sz));
493 if (ret < 0)
494 return ret;
495
496 evlist__for_each_entry(evlist, evsel) {
497 ret = do_write(ff, &evsel->attr, sz);
498 if (ret < 0)
499 return ret;
500
501
502
503
504
505
506
507 nri = evsel->ids;
508 ret = do_write(ff, &nri, sizeof(nri));
509 if (ret < 0)
510 return ret;
511
512
513
514
515 ret = do_write_string(ff, perf_evsel__name(evsel));
516 if (ret < 0)
517 return ret;
518
519
520
521 ret = do_write(ff, evsel->id, evsel->ids * sizeof(u64));
522 if (ret < 0)
523 return ret;
524 }
525 return 0;
526}
527
528static int write_cmdline(struct feat_fd *ff,
529 struct perf_evlist *evlist __maybe_unused)
530{
531 char pbuf[MAXPATHLEN], *buf;
532 int i, ret, n;
533
534
535 buf = perf_exe(pbuf, MAXPATHLEN);
536
537
538 n = perf_env.nr_cmdline + 1;
539
540 ret = do_write(ff, &n, sizeof(n));
541 if (ret < 0)
542 return ret;
543
544 ret = do_write_string(ff, buf);
545 if (ret < 0)
546 return ret;
547
548 for (i = 0 ; i < perf_env.nr_cmdline; i++) {
549 ret = do_write_string(ff, perf_env.cmdline_argv[i]);
550 if (ret < 0)
551 return ret;
552 }
553 return 0;
554}
555
556
557static int write_cpu_topology(struct feat_fd *ff,
558 struct perf_evlist *evlist __maybe_unused)
559{
560 struct cpu_topology *tp;
561 u32 i;
562 int ret, j;
563
564 tp = cpu_topology__new();
565 if (!tp)
566 return -1;
567
568 ret = do_write(ff, &tp->core_sib, sizeof(tp->core_sib));
569 if (ret < 0)
570 goto done;
571
572 for (i = 0; i < tp->core_sib; i++) {
573 ret = do_write_string(ff, tp->core_siblings[i]);
574 if (ret < 0)
575 goto done;
576 }
577 ret = do_write(ff, &tp->thread_sib, sizeof(tp->thread_sib));
578 if (ret < 0)
579 goto done;
580
581 for (i = 0; i < tp->thread_sib; i++) {
582 ret = do_write_string(ff, tp->thread_siblings[i]);
583 if (ret < 0)
584 break;
585 }
586
587 ret = perf_env__read_cpu_topology_map(&perf_env);
588 if (ret < 0)
589 goto done;
590
591 for (j = 0; j < perf_env.nr_cpus_avail; j++) {
592 ret = do_write(ff, &perf_env.cpu[j].core_id,
593 sizeof(perf_env.cpu[j].core_id));
594 if (ret < 0)
595 return ret;
596 ret = do_write(ff, &perf_env.cpu[j].socket_id,
597 sizeof(perf_env.cpu[j].socket_id));
598 if (ret < 0)
599 return ret;
600 }
601
602 if (!tp->die_sib)
603 goto done;
604
605 ret = do_write(ff, &tp->die_sib, sizeof(tp->die_sib));
606 if (ret < 0)
607 goto done;
608
609 for (i = 0; i < tp->die_sib; i++) {
610 ret = do_write_string(ff, tp->die_siblings[i]);
611 if (ret < 0)
612 goto done;
613 }
614
615 for (j = 0; j < perf_env.nr_cpus_avail; j++) {
616 ret = do_write(ff, &perf_env.cpu[j].die_id,
617 sizeof(perf_env.cpu[j].die_id));
618 if (ret < 0)
619 return ret;
620 }
621
622done:
623 cpu_topology__delete(tp);
624 return ret;
625}
626
627
628
629static int write_total_mem(struct feat_fd *ff,
630 struct perf_evlist *evlist __maybe_unused)
631{
632 char *buf = NULL;
633 FILE *fp;
634 size_t len = 0;
635 int ret = -1, n;
636 uint64_t mem;
637
638 fp = fopen("/proc/meminfo", "r");
639 if (!fp)
640 return -1;
641
642 while (getline(&buf, &len, fp) > 0) {
643 ret = strncmp(buf, "MemTotal:", 9);
644 if (!ret)
645 break;
646 }
647 if (!ret) {
648 n = sscanf(buf, "%*s %"PRIu64, &mem);
649 if (n == 1)
650 ret = do_write(ff, &mem, sizeof(mem));
651 } else
652 ret = -1;
653 free(buf);
654 fclose(fp);
655 return ret;
656}
657
658static int write_numa_topology(struct feat_fd *ff,
659 struct perf_evlist *evlist __maybe_unused)
660{
661 struct numa_topology *tp;
662 int ret = -1;
663 u32 i;
664
665 tp = numa_topology__new();
666 if (!tp)
667 return -ENOMEM;
668
669 ret = do_write(ff, &tp->nr, sizeof(u32));
670 if (ret < 0)
671 goto err;
672
673 for (i = 0; i < tp->nr; i++) {
674 struct numa_topology_node *n = &tp->nodes[i];
675
676 ret = do_write(ff, &n->node, sizeof(u32));
677 if (ret < 0)
678 goto err;
679
680 ret = do_write(ff, &n->mem_total, sizeof(u64));
681 if (ret)
682 goto err;
683
684 ret = do_write(ff, &n->mem_free, sizeof(u64));
685 if (ret)
686 goto err;
687
688 ret = do_write_string(ff, n->cpus);
689 if (ret < 0)
690 goto err;
691 }
692
693 ret = 0;
694
695err:
696 numa_topology__delete(tp);
697 return ret;
698}
699
700
701
702
703
704
705
706
707
708
709
710
711
712static int write_pmu_mappings(struct feat_fd *ff,
713 struct perf_evlist *evlist __maybe_unused)
714{
715 struct perf_pmu *pmu = NULL;
716 u32 pmu_num = 0;
717 int ret;
718
719
720
721
722
723 while ((pmu = perf_pmu__scan(pmu))) {
724 if (!pmu->name)
725 continue;
726 pmu_num++;
727 }
728
729 ret = do_write(ff, &pmu_num, sizeof(pmu_num));
730 if (ret < 0)
731 return ret;
732
733 while ((pmu = perf_pmu__scan(pmu))) {
734 if (!pmu->name)
735 continue;
736
737 ret = do_write(ff, &pmu->type, sizeof(pmu->type));
738 if (ret < 0)
739 return ret;
740
741 ret = do_write_string(ff, pmu->name);
742 if (ret < 0)
743 return ret;
744 }
745
746 return 0;
747}
748
749
750
751
752
753
754
755
756
757
758
759
760
761static int write_group_desc(struct feat_fd *ff,
762 struct perf_evlist *evlist)
763{
764 u32 nr_groups = evlist->nr_groups;
765 struct perf_evsel *evsel;
766 int ret;
767
768 ret = do_write(ff, &nr_groups, sizeof(nr_groups));
769 if (ret < 0)
770 return ret;
771
772 evlist__for_each_entry(evlist, evsel) {
773 if (perf_evsel__is_group_leader(evsel) &&
774 evsel->nr_members > 1) {
775 const char *name = evsel->group_name ?: "{anon_group}";
776 u32 leader_idx = evsel->idx;
777 u32 nr_members = evsel->nr_members;
778
779 ret = do_write_string(ff, name);
780 if (ret < 0)
781 return ret;
782
783 ret = do_write(ff, &leader_idx, sizeof(leader_idx));
784 if (ret < 0)
785 return ret;
786
787 ret = do_write(ff, &nr_members, sizeof(nr_members));
788 if (ret < 0)
789 return ret;
790 }
791 }
792 return 0;
793}
794
795
796
797
798
799
800
801char * __weak get_cpuid_str(struct perf_pmu *pmu __maybe_unused)
802{
803 return NULL;
804}
805
806
807
808
809
810int __weak strcmp_cpuid_str(const char *mapcpuid, const char *cpuid)
811{
812 regex_t re;
813 regmatch_t pmatch[1];
814 int match;
815
816 if (regcomp(&re, mapcpuid, REG_EXTENDED) != 0) {
817
818 pr_info("Invalid regular expression %s\n", mapcpuid);
819 return 1;
820 }
821
822 match = !regexec(&re, cpuid, 1, pmatch, 0);
823 regfree(&re);
824 if (match) {
825 size_t match_len = (pmatch[0].rm_eo - pmatch[0].rm_so);
826
827
828 if (match_len == strlen(cpuid))
829 return 0;
830 }
831 return 1;
832}
833
834
835
836
837
838int __weak get_cpuid(char *buffer __maybe_unused, size_t sz __maybe_unused)
839{
840 return -1;
841}
842
843static int write_cpuid(struct feat_fd *ff,
844 struct perf_evlist *evlist __maybe_unused)
845{
846 char buffer[64];
847 int ret;
848
849 ret = get_cpuid(buffer, sizeof(buffer));
850 if (ret)
851 return -1;
852
853 return do_write_string(ff, buffer);
854}
855
856static int write_branch_stack(struct feat_fd *ff __maybe_unused,
857 struct perf_evlist *evlist __maybe_unused)
858{
859 return 0;
860}
861
862static int write_auxtrace(struct feat_fd *ff,
863 struct perf_evlist *evlist __maybe_unused)
864{
865 struct perf_session *session;
866 int err;
867
868 if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__))
869 return -1;
870
871 session = container_of(ff->ph, struct perf_session, header);
872
873 err = auxtrace_index__write(ff->fd, &session->auxtrace_index);
874 if (err < 0)
875 pr_err("Failed to write auxtrace index\n");
876 return err;
877}
878
879static int write_clockid(struct feat_fd *ff,
880 struct perf_evlist *evlist __maybe_unused)
881{
882 return do_write(ff, &ff->ph->env.clockid_res_ns,
883 sizeof(ff->ph->env.clockid_res_ns));
884}
885
886static int write_dir_format(struct feat_fd *ff,
887 struct perf_evlist *evlist __maybe_unused)
888{
889 struct perf_session *session;
890 struct perf_data *data;
891
892 session = container_of(ff->ph, struct perf_session, header);
893 data = session->data;
894
895 if (WARN_ON(!perf_data__is_dir(data)))
896 return -1;
897
898 return do_write(ff, &data->dir.version, sizeof(data->dir.version));
899}
900
901#ifdef HAVE_LIBBPF_SUPPORT
902static int write_bpf_prog_info(struct feat_fd *ff,
903 struct perf_evlist *evlist __maybe_unused)
904{
905 struct perf_env *env = &ff->ph->env;
906 struct rb_root *root;
907 struct rb_node *next;
908 int ret;
909
910 down_read(&env->bpf_progs.lock);
911
912 ret = do_write(ff, &env->bpf_progs.infos_cnt,
913 sizeof(env->bpf_progs.infos_cnt));
914 if (ret < 0)
915 goto out;
916
917 root = &env->bpf_progs.infos;
918 next = rb_first(root);
919 while (next) {
920 struct bpf_prog_info_node *node;
921 size_t len;
922
923 node = rb_entry(next, struct bpf_prog_info_node, rb_node);
924 next = rb_next(&node->rb_node);
925 len = sizeof(struct bpf_prog_info_linear) +
926 node->info_linear->data_len;
927
928
929 bpf_program__bpil_addr_to_offs(node->info_linear);
930 ret = do_write(ff, node->info_linear, len);
931
932
933
934
935 bpf_program__bpil_offs_to_addr(node->info_linear);
936 if (ret < 0)
937 goto out;
938 }
939out:
940 up_read(&env->bpf_progs.lock);
941 return ret;
942}
943#else
944static int write_bpf_prog_info(struct feat_fd *ff __maybe_unused,
945 struct perf_evlist *evlist __maybe_unused)
946{
947 return 0;
948}
949#endif
950
951static int write_bpf_btf(struct feat_fd *ff,
952 struct perf_evlist *evlist __maybe_unused)
953{
954 struct perf_env *env = &ff->ph->env;
955 struct rb_root *root;
956 struct rb_node *next;
957 int ret;
958
959 down_read(&env->bpf_progs.lock);
960
961 ret = do_write(ff, &env->bpf_progs.btfs_cnt,
962 sizeof(env->bpf_progs.btfs_cnt));
963
964 if (ret < 0)
965 goto out;
966
967 root = &env->bpf_progs.btfs;
968 next = rb_first(root);
969 while (next) {
970 struct btf_node *node;
971
972 node = rb_entry(next, struct btf_node, rb_node);
973 next = rb_next(&node->rb_node);
974 ret = do_write(ff, &node->id,
975 sizeof(u32) * 2 + node->data_size);
976 if (ret < 0)
977 goto out;
978 }
979out:
980 up_read(&env->bpf_progs.lock);
981 return ret;
982}
983
984static int cpu_cache_level__sort(const void *a, const void *b)
985{
986 struct cpu_cache_level *cache_a = (struct cpu_cache_level *)a;
987 struct cpu_cache_level *cache_b = (struct cpu_cache_level *)b;
988
989 return cache_a->level - cache_b->level;
990}
991
992static bool cpu_cache_level__cmp(struct cpu_cache_level *a, struct cpu_cache_level *b)
993{
994 if (a->level != b->level)
995 return false;
996
997 if (a->line_size != b->line_size)
998 return false;
999
1000 if (a->sets != b->sets)
1001 return false;
1002
1003 if (a->ways != b->ways)
1004 return false;
1005
1006 if (strcmp(a->type, b->type))
1007 return false;
1008
1009 if (strcmp(a->size, b->size))
1010 return false;
1011
1012 if (strcmp(a->map, b->map))
1013 return false;
1014
1015 return true;
1016}
1017
1018static int cpu_cache_level__read(struct cpu_cache_level *cache, u32 cpu, u16 level)
1019{
1020 char path[PATH_MAX], file[PATH_MAX];
1021 struct stat st;
1022 size_t len;
1023
1024 scnprintf(path, PATH_MAX, "devices/system/cpu/cpu%d/cache/index%d/", cpu, level);
1025 scnprintf(file, PATH_MAX, "%s/%s", sysfs__mountpoint(), path);
1026
1027 if (stat(file, &st))
1028 return 1;
1029
1030 scnprintf(file, PATH_MAX, "%s/level", path);
1031 if (sysfs__read_int(file, (int *) &cache->level))
1032 return -1;
1033
1034 scnprintf(file, PATH_MAX, "%s/coherency_line_size", path);
1035 if (sysfs__read_int(file, (int *) &cache->line_size))
1036 return -1;
1037
1038 scnprintf(file, PATH_MAX, "%s/number_of_sets", path);
1039 if (sysfs__read_int(file, (int *) &cache->sets))
1040 return -1;
1041
1042 scnprintf(file, PATH_MAX, "%s/ways_of_associativity", path);
1043 if (sysfs__read_int(file, (int *) &cache->ways))
1044 return -1;
1045
1046 scnprintf(file, PATH_MAX, "%s/type", path);
1047 if (sysfs__read_str(file, &cache->type, &len))
1048 return -1;
1049
1050 cache->type[len] = 0;
1051 cache->type = strim(cache->type);
1052
1053 scnprintf(file, PATH_MAX, "%s/size", path);
1054 if (sysfs__read_str(file, &cache->size, &len)) {
1055 zfree(&cache->type);
1056 return -1;
1057 }
1058
1059 cache->size[len] = 0;
1060 cache->size = strim(cache->size);
1061
1062 scnprintf(file, PATH_MAX, "%s/shared_cpu_list", path);
1063 if (sysfs__read_str(file, &cache->map, &len)) {
1064 zfree(&cache->map);
1065 zfree(&cache->type);
1066 return -1;
1067 }
1068
1069 cache->map[len] = 0;
1070 cache->map = strim(cache->map);
1071 return 0;
1072}
1073
1074static void cpu_cache_level__fprintf(FILE *out, struct cpu_cache_level *c)
1075{
1076 fprintf(out, "L%d %-15s %8s [%s]\n", c->level, c->type, c->size, c->map);
1077}
1078
1079static int build_caches(struct cpu_cache_level caches[], u32 size, u32 *cntp)
1080{
1081 u32 i, cnt = 0;
1082 long ncpus;
1083 u32 nr, cpu;
1084 u16 level;
1085
1086 ncpus = sysconf(_SC_NPROCESSORS_CONF);
1087 if (ncpus < 0)
1088 return -1;
1089
1090 nr = (u32)(ncpus & UINT_MAX);
1091
1092 for (cpu = 0; cpu < nr; cpu++) {
1093 for (level = 0; level < 10; level++) {
1094 struct cpu_cache_level c;
1095 int err;
1096
1097 err = cpu_cache_level__read(&c, cpu, level);
1098 if (err < 0)
1099 return err;
1100
1101 if (err == 1)
1102 break;
1103
1104 for (i = 0; i < cnt; i++) {
1105 if (cpu_cache_level__cmp(&c, &caches[i]))
1106 break;
1107 }
1108
1109 if (i == cnt)
1110 caches[cnt++] = c;
1111 else
1112 cpu_cache_level__free(&c);
1113
1114 if (WARN_ONCE(cnt == size, "way too many cpu caches.."))
1115 goto out;
1116 }
1117 }
1118 out:
1119 *cntp = cnt;
1120 return 0;
1121}
1122
1123#define MAX_CACHES (MAX_NR_CPUS * 4)
1124
1125static int write_cache(struct feat_fd *ff,
1126 struct perf_evlist *evlist __maybe_unused)
1127{
1128 struct cpu_cache_level caches[MAX_CACHES];
1129 u32 cnt = 0, i, version = 1;
1130 int ret;
1131
1132 ret = build_caches(caches, MAX_CACHES, &cnt);
1133 if (ret)
1134 goto out;
1135
1136 qsort(&caches, cnt, sizeof(struct cpu_cache_level), cpu_cache_level__sort);
1137
1138 ret = do_write(ff, &version, sizeof(u32));
1139 if (ret < 0)
1140 goto out;
1141
1142 ret = do_write(ff, &cnt, sizeof(u32));
1143 if (ret < 0)
1144 goto out;
1145
1146 for (i = 0; i < cnt; i++) {
1147 struct cpu_cache_level *c = &caches[i];
1148
1149 #define _W(v) \
1150 ret = do_write(ff, &c->v, sizeof(u32)); \
1151 if (ret < 0) \
1152 goto out;
1153
1154 _W(level)
1155 _W(line_size)
1156 _W(sets)
1157 _W(ways)
1158 #undef _W
1159
1160 #define _W(v) \
1161 ret = do_write_string(ff, (const char *) c->v); \
1162 if (ret < 0) \
1163 goto out;
1164
1165 _W(type)
1166 _W(size)
1167 _W(map)
1168 #undef _W
1169 }
1170
1171out:
1172 for (i = 0; i < cnt; i++)
1173 cpu_cache_level__free(&caches[i]);
1174 return ret;
1175}
1176
1177static int write_stat(struct feat_fd *ff __maybe_unused,
1178 struct perf_evlist *evlist __maybe_unused)
1179{
1180 return 0;
1181}
1182
1183static int write_sample_time(struct feat_fd *ff,
1184 struct perf_evlist *evlist)
1185{
1186 int ret;
1187
1188 ret = do_write(ff, &evlist->first_sample_time,
1189 sizeof(evlist->first_sample_time));
1190 if (ret < 0)
1191 return ret;
1192
1193 return do_write(ff, &evlist->last_sample_time,
1194 sizeof(evlist->last_sample_time));
1195}
1196
1197
1198static int memory_node__read(struct memory_node *n, unsigned long idx)
1199{
1200 unsigned int phys, size = 0;
1201 char path[PATH_MAX];
1202 struct dirent *ent;
1203 DIR *dir;
1204
1205#define for_each_memory(mem, dir) \
1206 while ((ent = readdir(dir))) \
1207 if (strcmp(ent->d_name, ".") && \
1208 strcmp(ent->d_name, "..") && \
1209 sscanf(ent->d_name, "memory%u", &mem) == 1)
1210
1211 scnprintf(path, PATH_MAX,
1212 "%s/devices/system/node/node%lu",
1213 sysfs__mountpoint(), idx);
1214
1215 dir = opendir(path);
1216 if (!dir) {
1217 pr_warning("failed: cant' open memory sysfs data\n");
1218 return -1;
1219 }
1220
1221 for_each_memory(phys, dir) {
1222 size = max(phys, size);
1223 }
1224
1225 size++;
1226
1227 n->set = bitmap_alloc(size);
1228 if (!n->set) {
1229 closedir(dir);
1230 return -ENOMEM;
1231 }
1232
1233 n->node = idx;
1234 n->size = size;
1235
1236 rewinddir(dir);
1237
1238 for_each_memory(phys, dir) {
1239 set_bit(phys, n->set);
1240 }
1241
1242 closedir(dir);
1243 return 0;
1244}
1245
1246static int memory_node__sort(const void *a, const void *b)
1247{
1248 const struct memory_node *na = a;
1249 const struct memory_node *nb = b;
1250
1251 return na->node - nb->node;
1252}
1253
1254static int build_mem_topology(struct memory_node *nodes, u64 size, u64 *cntp)
1255{
1256 char path[PATH_MAX];
1257 struct dirent *ent;
1258 DIR *dir;
1259 u64 cnt = 0;
1260 int ret = 0;
1261
1262 scnprintf(path, PATH_MAX, "%s/devices/system/node/",
1263 sysfs__mountpoint());
1264
1265 dir = opendir(path);
1266 if (!dir) {
1267 pr_debug2("%s: could't read %s, does this arch have topology information?\n",
1268 __func__, path);
1269 return -1;
1270 }
1271
1272 while (!ret && (ent = readdir(dir))) {
1273 unsigned int idx;
1274 int r;
1275
1276 if (!strcmp(ent->d_name, ".") ||
1277 !strcmp(ent->d_name, ".."))
1278 continue;
1279
1280 r = sscanf(ent->d_name, "node%u", &idx);
1281 if (r != 1)
1282 continue;
1283
1284 if (WARN_ONCE(cnt >= size,
1285 "failed to write MEM_TOPOLOGY, way too many nodes\n"))
1286 return -1;
1287
1288 ret = memory_node__read(&nodes[cnt++], idx);
1289 }
1290
1291 *cntp = cnt;
1292 closedir(dir);
1293
1294 if (!ret)
1295 qsort(nodes, cnt, sizeof(nodes[0]), memory_node__sort);
1296
1297 return ret;
1298}
1299
1300#define MAX_MEMORY_NODES 2000
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317static int write_mem_topology(struct feat_fd *ff __maybe_unused,
1318 struct perf_evlist *evlist __maybe_unused)
1319{
1320 static struct memory_node nodes[MAX_MEMORY_NODES];
1321 u64 bsize, version = 1, i, nr;
1322 int ret;
1323
1324 ret = sysfs__read_xll("devices/system/memory/block_size_bytes",
1325 (unsigned long long *) &bsize);
1326 if (ret)
1327 return ret;
1328
1329 ret = build_mem_topology(&nodes[0], MAX_MEMORY_NODES, &nr);
1330 if (ret)
1331 return ret;
1332
1333 ret = do_write(ff, &version, sizeof(version));
1334 if (ret < 0)
1335 goto out;
1336
1337 ret = do_write(ff, &bsize, sizeof(bsize));
1338 if (ret < 0)
1339 goto out;
1340
1341 ret = do_write(ff, &nr, sizeof(nr));
1342 if (ret < 0)
1343 goto out;
1344
1345 for (i = 0; i < nr; i++) {
1346 struct memory_node *n = &nodes[i];
1347
1348 #define _W(v) \
1349 ret = do_write(ff, &n->v, sizeof(n->v)); \
1350 if (ret < 0) \
1351 goto out;
1352
1353 _W(node)
1354 _W(size)
1355
1356 #undef _W
1357
1358 ret = do_write_bitmap(ff, n->set, n->size);
1359 if (ret < 0)
1360 goto out;
1361 }
1362
1363out:
1364 return ret;
1365}
1366
1367static int write_compressed(struct feat_fd *ff __maybe_unused,
1368 struct perf_evlist *evlist __maybe_unused)
1369{
1370 int ret;
1371
1372 ret = do_write(ff, &(ff->ph->env.comp_ver), sizeof(ff->ph->env.comp_ver));
1373 if (ret)
1374 return ret;
1375
1376 ret = do_write(ff, &(ff->ph->env.comp_type), sizeof(ff->ph->env.comp_type));
1377 if (ret)
1378 return ret;
1379
1380 ret = do_write(ff, &(ff->ph->env.comp_level), sizeof(ff->ph->env.comp_level));
1381 if (ret)
1382 return ret;
1383
1384 ret = do_write(ff, &(ff->ph->env.comp_ratio), sizeof(ff->ph->env.comp_ratio));
1385 if (ret)
1386 return ret;
1387
1388 return do_write(ff, &(ff->ph->env.comp_mmap_len), sizeof(ff->ph->env.comp_mmap_len));
1389}
1390
1391static void print_hostname(struct feat_fd *ff, FILE *fp)
1392{
1393 fprintf(fp, "# hostname : %s\n", ff->ph->env.hostname);
1394}
1395
1396static void print_osrelease(struct feat_fd *ff, FILE *fp)
1397{
1398 fprintf(fp, "# os release : %s\n", ff->ph->env.os_release);
1399}
1400
1401static void print_arch(struct feat_fd *ff, FILE *fp)
1402{
1403 fprintf(fp, "# arch : %s\n", ff->ph->env.arch);
1404}
1405
1406static void print_cpudesc(struct feat_fd *ff, FILE *fp)
1407{
1408 fprintf(fp, "# cpudesc : %s\n", ff->ph->env.cpu_desc);
1409}
1410
1411static void print_nrcpus(struct feat_fd *ff, FILE *fp)
1412{
1413 fprintf(fp, "# nrcpus online : %u\n", ff->ph->env.nr_cpus_online);
1414 fprintf(fp, "# nrcpus avail : %u\n", ff->ph->env.nr_cpus_avail);
1415}
1416
1417static void print_version(struct feat_fd *ff, FILE *fp)
1418{
1419 fprintf(fp, "# perf version : %s\n", ff->ph->env.version);
1420}
1421
1422static void print_cmdline(struct feat_fd *ff, FILE *fp)
1423{
1424 int nr, i;
1425
1426 nr = ff->ph->env.nr_cmdline;
1427
1428 fprintf(fp, "# cmdline : ");
1429
1430 for (i = 0; i < nr; i++) {
1431 char *argv_i = strdup(ff->ph->env.cmdline_argv[i]);
1432 if (!argv_i) {
1433 fprintf(fp, "%s ", ff->ph->env.cmdline_argv[i]);
1434 } else {
1435 char *mem = argv_i;
1436 do {
1437 char *quote = strchr(argv_i, '\'');
1438 if (!quote)
1439 break;
1440 *quote++ = '\0';
1441 fprintf(fp, "%s\\\'", argv_i);
1442 argv_i = quote;
1443 } while (1);
1444 fprintf(fp, "%s ", argv_i);
1445 free(mem);
1446 }
1447 }
1448 fputc('\n', fp);
1449}
1450
1451static void print_cpu_topology(struct feat_fd *ff, FILE *fp)
1452{
1453 struct perf_header *ph = ff->ph;
1454 int cpu_nr = ph->env.nr_cpus_avail;
1455 int nr, i;
1456 char *str;
1457
1458 nr = ph->env.nr_sibling_cores;
1459 str = ph->env.sibling_cores;
1460
1461 for (i = 0; i < nr; i++) {
1462 fprintf(fp, "# sibling sockets : %s\n", str);
1463 str += strlen(str) + 1;
1464 }
1465
1466 if (ph->env.nr_sibling_dies) {
1467 nr = ph->env.nr_sibling_dies;
1468 str = ph->env.sibling_dies;
1469
1470 for (i = 0; i < nr; i++) {
1471 fprintf(fp, "# sibling dies : %s\n", str);
1472 str += strlen(str) + 1;
1473 }
1474 }
1475
1476 nr = ph->env.nr_sibling_threads;
1477 str = ph->env.sibling_threads;
1478
1479 for (i = 0; i < nr; i++) {
1480 fprintf(fp, "# sibling threads : %s\n", str);
1481 str += strlen(str) + 1;
1482 }
1483
1484 if (ph->env.nr_sibling_dies) {
1485 if (ph->env.cpu != NULL) {
1486 for (i = 0; i < cpu_nr; i++)
1487 fprintf(fp, "# CPU %d: Core ID %d, "
1488 "Die ID %d, Socket ID %d\n",
1489 i, ph->env.cpu[i].core_id,
1490 ph->env.cpu[i].die_id,
1491 ph->env.cpu[i].socket_id);
1492 } else
1493 fprintf(fp, "# Core ID, Die ID and Socket ID "
1494 "information is not available\n");
1495 } else {
1496 if (ph->env.cpu != NULL) {
1497 for (i = 0; i < cpu_nr; i++)
1498 fprintf(fp, "# CPU %d: Core ID %d, "
1499 "Socket ID %d\n",
1500 i, ph->env.cpu[i].core_id,
1501 ph->env.cpu[i].socket_id);
1502 } else
1503 fprintf(fp, "# Core ID and Socket ID "
1504 "information is not available\n");
1505 }
1506}
1507
1508static void print_clockid(struct feat_fd *ff, FILE *fp)
1509{
1510 fprintf(fp, "# clockid frequency: %"PRIu64" MHz\n",
1511 ff->ph->env.clockid_res_ns * 1000);
1512}
1513
1514static void print_dir_format(struct feat_fd *ff, FILE *fp)
1515{
1516 struct perf_session *session;
1517 struct perf_data *data;
1518
1519 session = container_of(ff->ph, struct perf_session, header);
1520 data = session->data;
1521
1522 fprintf(fp, "# directory data version : %"PRIu64"\n", data->dir.version);
1523}
1524
1525static void print_bpf_prog_info(struct feat_fd *ff, FILE *fp)
1526{
1527 struct perf_env *env = &ff->ph->env;
1528 struct rb_root *root;
1529 struct rb_node *next;
1530
1531 down_read(&env->bpf_progs.lock);
1532
1533 root = &env->bpf_progs.infos;
1534 next = rb_first(root);
1535
1536 while (next) {
1537 struct bpf_prog_info_node *node;
1538
1539 node = rb_entry(next, struct bpf_prog_info_node, rb_node);
1540 next = rb_next(&node->rb_node);
1541
1542 bpf_event__print_bpf_prog_info(&node->info_linear->info,
1543 env, fp);
1544 }
1545
1546 up_read(&env->bpf_progs.lock);
1547}
1548
1549static void print_bpf_btf(struct feat_fd *ff, FILE *fp)
1550{
1551 struct perf_env *env = &ff->ph->env;
1552 struct rb_root *root;
1553 struct rb_node *next;
1554
1555 down_read(&env->bpf_progs.lock);
1556
1557 root = &env->bpf_progs.btfs;
1558 next = rb_first(root);
1559
1560 while (next) {
1561 struct btf_node *node;
1562
1563 node = rb_entry(next, struct btf_node, rb_node);
1564 next = rb_next(&node->rb_node);
1565 fprintf(fp, "# btf info of id %u\n", node->id);
1566 }
1567
1568 up_read(&env->bpf_progs.lock);
1569}
1570
1571static void free_event_desc(struct perf_evsel *events)
1572{
1573 struct perf_evsel *evsel;
1574
1575 if (!events)
1576 return;
1577
1578 for (evsel = events; evsel->attr.size; evsel++) {
1579 zfree(&evsel->name);
1580 zfree(&evsel->id);
1581 }
1582
1583 free(events);
1584}
1585
1586static struct perf_evsel *read_event_desc(struct feat_fd *ff)
1587{
1588 struct perf_evsel *evsel, *events = NULL;
1589 u64 *id;
1590 void *buf = NULL;
1591 u32 nre, sz, nr, i, j;
1592 size_t msz;
1593
1594
1595 if (do_read_u32(ff, &nre))
1596 goto error;
1597
1598 if (do_read_u32(ff, &sz))
1599 goto error;
1600
1601
1602 buf = malloc(sz);
1603 if (!buf)
1604 goto error;
1605
1606
1607 events = calloc(nre + 1, sizeof(*events));
1608 if (!events)
1609 goto error;
1610
1611 msz = sizeof(evsel->attr);
1612 if (sz < msz)
1613 msz = sz;
1614
1615 for (i = 0, evsel = events; i < nre; evsel++, i++) {
1616 evsel->idx = i;
1617
1618
1619
1620
1621
1622 if (__do_read(ff, buf, sz))
1623 goto error;
1624
1625 if (ff->ph->needs_swap)
1626 perf_event__attr_swap(buf);
1627
1628 memcpy(&evsel->attr, buf, msz);
1629
1630 if (do_read_u32(ff, &nr))
1631 goto error;
1632
1633 if (ff->ph->needs_swap)
1634 evsel->needs_swap = true;
1635
1636 evsel->name = do_read_string(ff);
1637 if (!evsel->name)
1638 goto error;
1639
1640 if (!nr)
1641 continue;
1642
1643 id = calloc(nr, sizeof(*id));
1644 if (!id)
1645 goto error;
1646 evsel->ids = nr;
1647 evsel->id = id;
1648
1649 for (j = 0 ; j < nr; j++) {
1650 if (do_read_u64(ff, id))
1651 goto error;
1652 id++;
1653 }
1654 }
1655out:
1656 free(buf);
1657 return events;
1658error:
1659 free_event_desc(events);
1660 events = NULL;
1661 goto out;
1662}
1663
1664static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val,
1665 void *priv __maybe_unused)
1666{
1667 return fprintf(fp, ", %s = %s", name, val);
1668}
1669
1670static void print_event_desc(struct feat_fd *ff, FILE *fp)
1671{
1672 struct perf_evsel *evsel, *events;
1673 u32 j;
1674 u64 *id;
1675
1676 if (ff->events)
1677 events = ff->events;
1678 else
1679 events = read_event_desc(ff);
1680
1681 if (!events) {
1682 fprintf(fp, "# event desc: not available or unable to read\n");
1683 return;
1684 }
1685
1686 for (evsel = events; evsel->attr.size; evsel++) {
1687 fprintf(fp, "# event : name = %s, ", evsel->name);
1688
1689 if (evsel->ids) {
1690 fprintf(fp, ", id = {");
1691 for (j = 0, id = evsel->id; j < evsel->ids; j++, id++) {
1692 if (j)
1693 fputc(',', fp);
1694 fprintf(fp, " %"PRIu64, *id);
1695 }
1696 fprintf(fp, " }");
1697 }
1698
1699 perf_event_attr__fprintf(fp, &evsel->attr, __desc_attr__fprintf, NULL);
1700
1701 fputc('\n', fp);
1702 }
1703
1704 free_event_desc(events);
1705 ff->events = NULL;
1706}
1707
1708static void print_total_mem(struct feat_fd *ff, FILE *fp)
1709{
1710 fprintf(fp, "# total memory : %llu kB\n", ff->ph->env.total_mem);
1711}
1712
1713static void print_numa_topology(struct feat_fd *ff, FILE *fp)
1714{
1715 int i;
1716 struct numa_node *n;
1717
1718 for (i = 0; i < ff->ph->env.nr_numa_nodes; i++) {
1719 n = &ff->ph->env.numa_nodes[i];
1720
1721 fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB,"
1722 " free = %"PRIu64" kB\n",
1723 n->node, n->mem_total, n->mem_free);
1724
1725 fprintf(fp, "# node%u cpu list : ", n->node);
1726 cpu_map__fprintf(n->map, fp);
1727 }
1728}
1729
1730static void print_cpuid(struct feat_fd *ff, FILE *fp)
1731{
1732 fprintf(fp, "# cpuid : %s\n", ff->ph->env.cpuid);
1733}
1734
1735static void print_branch_stack(struct feat_fd *ff __maybe_unused, FILE *fp)
1736{
1737 fprintf(fp, "# contains samples with branch stack\n");
1738}
1739
1740static void print_auxtrace(struct feat_fd *ff __maybe_unused, FILE *fp)
1741{
1742 fprintf(fp, "# contains AUX area data (e.g. instruction trace)\n");
1743}
1744
1745static void print_stat(struct feat_fd *ff __maybe_unused, FILE *fp)
1746{
1747 fprintf(fp, "# contains stat data\n");
1748}
1749
1750static void print_cache(struct feat_fd *ff, FILE *fp __maybe_unused)
1751{
1752 int i;
1753
1754 fprintf(fp, "# CPU cache info:\n");
1755 for (i = 0; i < ff->ph->env.caches_cnt; i++) {
1756 fprintf(fp, "# ");
1757 cpu_cache_level__fprintf(fp, &ff->ph->env.caches[i]);
1758 }
1759}
1760
1761static void print_compressed(struct feat_fd *ff, FILE *fp)
1762{
1763 fprintf(fp, "# compressed : %s, level = %d, ratio = %d\n",
1764 ff->ph->env.comp_type == PERF_COMP_ZSTD ? "Zstd" : "Unknown",
1765 ff->ph->env.comp_level, ff->ph->env.comp_ratio);
1766}
1767
1768static void print_pmu_mappings(struct feat_fd *ff, FILE *fp)
1769{
1770 const char *delimiter = "# pmu mappings: ";
1771 char *str, *tmp;
1772 u32 pmu_num;
1773 u32 type;
1774
1775 pmu_num = ff->ph->env.nr_pmu_mappings;
1776 if (!pmu_num) {
1777 fprintf(fp, "# pmu mappings: not available\n");
1778 return;
1779 }
1780
1781 str = ff->ph->env.pmu_mappings;
1782
1783 while (pmu_num) {
1784 type = strtoul(str, &tmp, 0);
1785 if (*tmp != ':')
1786 goto error;
1787
1788 str = tmp + 1;
1789 fprintf(fp, "%s%s = %" PRIu32, delimiter, str, type);
1790
1791 delimiter = ", ";
1792 str += strlen(str) + 1;
1793 pmu_num--;
1794 }
1795
1796 fprintf(fp, "\n");
1797
1798 if (!pmu_num)
1799 return;
1800error:
1801 fprintf(fp, "# pmu mappings: unable to read\n");
1802}
1803
1804static void print_group_desc(struct feat_fd *ff, FILE *fp)
1805{
1806 struct perf_session *session;
1807 struct perf_evsel *evsel;
1808 u32 nr = 0;
1809
1810 session = container_of(ff->ph, struct perf_session, header);
1811
1812 evlist__for_each_entry(session->evlist, evsel) {
1813 if (perf_evsel__is_group_leader(evsel) &&
1814 evsel->nr_members > 1) {
1815 fprintf(fp, "# group: %s{%s", evsel->group_name ?: "",
1816 perf_evsel__name(evsel));
1817
1818 nr = evsel->nr_members - 1;
1819 } else if (nr) {
1820 fprintf(fp, ",%s", perf_evsel__name(evsel));
1821
1822 if (--nr == 0)
1823 fprintf(fp, "}\n");
1824 }
1825 }
1826}
1827
1828static void print_sample_time(struct feat_fd *ff, FILE *fp)
1829{
1830 struct perf_session *session;
1831 char time_buf[32];
1832 double d;
1833
1834 session = container_of(ff->ph, struct perf_session, header);
1835
1836 timestamp__scnprintf_usec(session->evlist->first_sample_time,
1837 time_buf, sizeof(time_buf));
1838 fprintf(fp, "# time of first sample : %s\n", time_buf);
1839
1840 timestamp__scnprintf_usec(session->evlist->last_sample_time,
1841 time_buf, sizeof(time_buf));
1842 fprintf(fp, "# time of last sample : %s\n", time_buf);
1843
1844 d = (double)(session->evlist->last_sample_time -
1845 session->evlist->first_sample_time) / NSEC_PER_MSEC;
1846
1847 fprintf(fp, "# sample duration : %10.3f ms\n", d);
1848}
1849
1850static void memory_node__fprintf(struct memory_node *n,
1851 unsigned long long bsize, FILE *fp)
1852{
1853 char buf_map[100], buf_size[50];
1854 unsigned long long size;
1855
1856 size = bsize * bitmap_weight(n->set, n->size);
1857 unit_number__scnprintf(buf_size, 50, size);
1858
1859 bitmap_scnprintf(n->set, n->size, buf_map, 100);
1860 fprintf(fp, "# %3" PRIu64 " [%s]: %s\n", n->node, buf_size, buf_map);
1861}
1862
1863static void print_mem_topology(struct feat_fd *ff, FILE *fp)
1864{
1865 struct memory_node *nodes;
1866 int i, nr;
1867
1868 nodes = ff->ph->env.memory_nodes;
1869 nr = ff->ph->env.nr_memory_nodes;
1870
1871 fprintf(fp, "# memory nodes (nr %d, block size 0x%llx):\n",
1872 nr, ff->ph->env.memory_bsize);
1873
1874 for (i = 0; i < nr; i++) {
1875 memory_node__fprintf(&nodes[i], ff->ph->env.memory_bsize, fp);
1876 }
1877}
1878
1879static int __event_process_build_id(struct build_id_event *bev,
1880 char *filename,
1881 struct perf_session *session)
1882{
1883 int err = -1;
1884 struct machine *machine;
1885 u16 cpumode;
1886 struct dso *dso;
1887 enum dso_kernel_type dso_type;
1888
1889 machine = perf_session__findnew_machine(session, bev->pid);
1890 if (!machine)
1891 goto out;
1892
1893 cpumode = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1894
1895 switch (cpumode) {
1896 case PERF_RECORD_MISC_KERNEL:
1897 dso_type = DSO_TYPE_KERNEL;
1898 break;
1899 case PERF_RECORD_MISC_GUEST_KERNEL:
1900 dso_type = DSO_TYPE_GUEST_KERNEL;
1901 break;
1902 case PERF_RECORD_MISC_USER:
1903 case PERF_RECORD_MISC_GUEST_USER:
1904 dso_type = DSO_TYPE_USER;
1905 break;
1906 default:
1907 goto out;
1908 }
1909
1910 dso = machine__findnew_dso(machine, filename);
1911 if (dso != NULL) {
1912 char sbuild_id[SBUILD_ID_SIZE];
1913
1914 dso__set_build_id(dso, &bev->build_id);
1915
1916 if (dso_type != DSO_TYPE_USER) {
1917 struct kmod_path m = { .name = NULL, };
1918
1919 if (!kmod_path__parse_name(&m, filename) && m.kmod)
1920 dso__set_module_info(dso, &m, machine);
1921 else
1922 dso->kernel = dso_type;
1923
1924 free(m.name);
1925 }
1926
1927 build_id__sprintf(dso->build_id, sizeof(dso->build_id),
1928 sbuild_id);
1929 pr_debug("build id event received for %s: %s\n",
1930 dso->long_name, sbuild_id);
1931 dso__put(dso);
1932 }
1933
1934 err = 0;
1935out:
1936 return err;
1937}
1938
1939static int perf_header__read_build_ids_abi_quirk(struct perf_header *header,
1940 int input, u64 offset, u64 size)
1941{
1942 struct perf_session *session = container_of(header, struct perf_session, header);
1943 struct {
1944 struct perf_event_header header;
1945 u8 build_id[PERF_ALIGN(BUILD_ID_SIZE, sizeof(u64))];
1946 char filename[0];
1947 } old_bev;
1948 struct build_id_event bev;
1949 char filename[PATH_MAX];
1950 u64 limit = offset + size;
1951
1952 while (offset < limit) {
1953 ssize_t len;
1954
1955 if (readn(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev))
1956 return -1;
1957
1958 if (header->needs_swap)
1959 perf_event_header__bswap(&old_bev.header);
1960
1961 len = old_bev.header.size - sizeof(old_bev);
1962 if (readn(input, filename, len) != len)
1963 return -1;
1964
1965 bev.header = old_bev.header;
1966
1967
1968
1969
1970
1971 bev.pid = HOST_KERNEL_ID;
1972 if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER ||
1973 bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL)
1974 bev.pid = DEFAULT_GUEST_KERNEL_ID;
1975
1976 memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id));
1977 __event_process_build_id(&bev, filename, session);
1978
1979 offset += bev.header.size;
1980 }
1981
1982 return 0;
1983}
1984
1985static int perf_header__read_build_ids(struct perf_header *header,
1986 int input, u64 offset, u64 size)
1987{
1988 struct perf_session *session = container_of(header, struct perf_session, header);
1989 struct build_id_event bev;
1990 char filename[PATH_MAX];
1991 u64 limit = offset + size, orig_offset = offset;
1992 int err = -1;
1993
1994 while (offset < limit) {
1995 ssize_t len;
1996
1997 if (readn(input, &bev, sizeof(bev)) != sizeof(bev))
1998 goto out;
1999
2000 if (header->needs_swap)
2001 perf_event_header__bswap(&bev.header);
2002
2003 len = bev.header.size - sizeof(bev);
2004 if (readn(input, filename, len) != len)
2005 goto out;
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019 if (memcmp(filename, "nel.kallsyms]", 13) == 0) {
2020 if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1)
2021 return -1;
2022 return perf_header__read_build_ids_abi_quirk(header, input, offset, size);
2023 }
2024
2025 __event_process_build_id(&bev, filename, session);
2026
2027 offset += bev.header.size;
2028 }
2029 err = 0;
2030out:
2031 return err;
2032}
2033
2034
2035#define FEAT_PROCESS_STR_FUN(__feat, __feat_env) \
2036static int process_##__feat(struct feat_fd *ff, void *data __maybe_unused) \
2037{\
2038 ff->ph->env.__feat_env = do_read_string(ff); \
2039 return ff->ph->env.__feat_env ? 0 : -ENOMEM; \
2040}
2041
2042FEAT_PROCESS_STR_FUN(hostname, hostname);
2043FEAT_PROCESS_STR_FUN(osrelease, os_release);
2044FEAT_PROCESS_STR_FUN(version, version);
2045FEAT_PROCESS_STR_FUN(arch, arch);
2046FEAT_PROCESS_STR_FUN(cpudesc, cpu_desc);
2047FEAT_PROCESS_STR_FUN(cpuid, cpuid);
2048
2049static int process_tracing_data(struct feat_fd *ff, void *data)
2050{
2051 ssize_t ret = trace_report(ff->fd, data, false);
2052
2053 return ret < 0 ? -1 : 0;
2054}
2055
2056static int process_build_id(struct feat_fd *ff, void *data __maybe_unused)
2057{
2058 if (perf_header__read_build_ids(ff->ph, ff->fd, ff->offset, ff->size))
2059 pr_debug("Failed to read buildids, continuing...\n");
2060 return 0;
2061}
2062
2063static int process_nrcpus(struct feat_fd *ff, void *data __maybe_unused)
2064{
2065 int ret;
2066 u32 nr_cpus_avail, nr_cpus_online;
2067
2068 ret = do_read_u32(ff, &nr_cpus_avail);
2069 if (ret)
2070 return ret;
2071
2072 ret = do_read_u32(ff, &nr_cpus_online);
2073 if (ret)
2074 return ret;
2075 ff->ph->env.nr_cpus_avail = (int)nr_cpus_avail;
2076 ff->ph->env.nr_cpus_online = (int)nr_cpus_online;
2077 return 0;
2078}
2079
2080static int process_total_mem(struct feat_fd *ff, void *data __maybe_unused)
2081{
2082 u64 total_mem;
2083 int ret;
2084
2085 ret = do_read_u64(ff, &total_mem);
2086 if (ret)
2087 return -1;
2088 ff->ph->env.total_mem = (unsigned long long)total_mem;
2089 return 0;
2090}
2091
2092static struct perf_evsel *
2093perf_evlist__find_by_index(struct perf_evlist *evlist, int idx)
2094{
2095 struct perf_evsel *evsel;
2096
2097 evlist__for_each_entry(evlist, evsel) {
2098 if (evsel->idx == idx)
2099 return evsel;
2100 }
2101
2102 return NULL;
2103}
2104
2105static void
2106perf_evlist__set_event_name(struct perf_evlist *evlist,
2107 struct perf_evsel *event)
2108{
2109 struct perf_evsel *evsel;
2110
2111 if (!event->name)
2112 return;
2113
2114 evsel = perf_evlist__find_by_index(evlist, event->idx);
2115 if (!evsel)
2116 return;
2117
2118 if (evsel->name)
2119 return;
2120
2121 evsel->name = strdup(event->name);
2122}
2123
2124static int
2125process_event_desc(struct feat_fd *ff, void *data __maybe_unused)
2126{
2127 struct perf_session *session;
2128 struct perf_evsel *evsel, *events = read_event_desc(ff);
2129
2130 if (!events)
2131 return 0;
2132
2133 session = container_of(ff->ph, struct perf_session, header);
2134
2135 if (session->data->is_pipe) {
2136
2137
2138 ff->events = events;
2139 }
2140
2141 for (evsel = events; evsel->attr.size; evsel++)
2142 perf_evlist__set_event_name(session->evlist, evsel);
2143
2144 if (!session->data->is_pipe)
2145 free_event_desc(events);
2146
2147 return 0;
2148}
2149
2150static int process_cmdline(struct feat_fd *ff, void *data __maybe_unused)
2151{
2152 char *str, *cmdline = NULL, **argv = NULL;
2153 u32 nr, i, len = 0;
2154
2155 if (do_read_u32(ff, &nr))
2156 return -1;
2157
2158 ff->ph->env.nr_cmdline = nr;
2159
2160 cmdline = zalloc(ff->size + nr + 1);
2161 if (!cmdline)
2162 return -1;
2163
2164 argv = zalloc(sizeof(char *) * (nr + 1));
2165 if (!argv)
2166 goto error;
2167
2168 for (i = 0; i < nr; i++) {
2169 str = do_read_string(ff);
2170 if (!str)
2171 goto error;
2172
2173 argv[i] = cmdline + len;
2174 memcpy(argv[i], str, strlen(str) + 1);
2175 len += strlen(str) + 1;
2176 free(str);
2177 }
2178 ff->ph->env.cmdline = cmdline;
2179 ff->ph->env.cmdline_argv = (const char **) argv;
2180 return 0;
2181
2182error:
2183 free(argv);
2184 free(cmdline);
2185 return -1;
2186}
2187
2188static int process_cpu_topology(struct feat_fd *ff, void *data __maybe_unused)
2189{
2190 u32 nr, i;
2191 char *str;
2192 struct strbuf sb;
2193 int cpu_nr = ff->ph->env.nr_cpus_avail;
2194 u64 size = 0;
2195 struct perf_header *ph = ff->ph;
2196 bool do_core_id_test = true;
2197
2198 ph->env.cpu = calloc(cpu_nr, sizeof(*ph->env.cpu));
2199 if (!ph->env.cpu)
2200 return -1;
2201
2202 if (do_read_u32(ff, &nr))
2203 goto free_cpu;
2204
2205 ph->env.nr_sibling_cores = nr;
2206 size += sizeof(u32);
2207 if (strbuf_init(&sb, 128) < 0)
2208 goto free_cpu;
2209
2210 for (i = 0; i < nr; i++) {
2211 str = do_read_string(ff);
2212 if (!str)
2213 goto error;
2214
2215
2216 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
2217 goto error;
2218 size += string_size(str);
2219 free(str);
2220 }
2221 ph->env.sibling_cores = strbuf_detach(&sb, NULL);
2222
2223 if (do_read_u32(ff, &nr))
2224 return -1;
2225
2226 ph->env.nr_sibling_threads = nr;
2227 size += sizeof(u32);
2228
2229 for (i = 0; i < nr; i++) {
2230 str = do_read_string(ff);
2231 if (!str)
2232 goto error;
2233
2234
2235 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
2236 goto error;
2237 size += string_size(str);
2238 free(str);
2239 }
2240 ph->env.sibling_threads = strbuf_detach(&sb, NULL);
2241
2242
2243
2244
2245
2246 if (ff->size <= size) {
2247 zfree(&ph->env.cpu);
2248 return 0;
2249 }
2250
2251
2252
2253
2254
2255 if (ph->env.arch && !strncmp(ph->env.arch, "s390", 4))
2256 do_core_id_test = false;
2257
2258 for (i = 0; i < (u32)cpu_nr; i++) {
2259 if (do_read_u32(ff, &nr))
2260 goto free_cpu;
2261
2262 ph->env.cpu[i].core_id = nr;
2263 size += sizeof(u32);
2264
2265 if (do_read_u32(ff, &nr))
2266 goto free_cpu;
2267
2268 if (do_core_id_test && nr != (u32)-1 && nr > (u32)cpu_nr) {
2269 pr_debug("socket_id number is too big."
2270 "You may need to upgrade the perf tool.\n");
2271 goto free_cpu;
2272 }
2273
2274 ph->env.cpu[i].socket_id = nr;
2275 size += sizeof(u32);
2276 }
2277
2278
2279
2280
2281
2282 if (ff->size <= size)
2283 return 0;
2284
2285 if (do_read_u32(ff, &nr))
2286 return -1;
2287
2288 ph->env.nr_sibling_dies = nr;
2289 size += sizeof(u32);
2290
2291 for (i = 0; i < nr; i++) {
2292 str = do_read_string(ff);
2293 if (!str)
2294 goto error;
2295
2296
2297 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
2298 goto error;
2299 size += string_size(str);
2300 free(str);
2301 }
2302 ph->env.sibling_dies = strbuf_detach(&sb, NULL);
2303
2304 for (i = 0; i < (u32)cpu_nr; i++) {
2305 if (do_read_u32(ff, &nr))
2306 goto free_cpu;
2307
2308 ph->env.cpu[i].die_id = nr;
2309 }
2310
2311 return 0;
2312
2313error:
2314 strbuf_release(&sb);
2315free_cpu:
2316 zfree(&ph->env.cpu);
2317 return -1;
2318}
2319
2320static int process_numa_topology(struct feat_fd *ff, void *data __maybe_unused)
2321{
2322 struct numa_node *nodes, *n;
2323 u32 nr, i;
2324 char *str;
2325
2326
2327 if (do_read_u32(ff, &nr))
2328 return -1;
2329
2330 nodes = zalloc(sizeof(*nodes) * nr);
2331 if (!nodes)
2332 return -ENOMEM;
2333
2334 for (i = 0; i < nr; i++) {
2335 n = &nodes[i];
2336
2337
2338 if (do_read_u32(ff, &n->node))
2339 goto error;
2340
2341 if (do_read_u64(ff, &n->mem_total))
2342 goto error;
2343
2344 if (do_read_u64(ff, &n->mem_free))
2345 goto error;
2346
2347 str = do_read_string(ff);
2348 if (!str)
2349 goto error;
2350
2351 n->map = cpu_map__new(str);
2352 if (!n->map)
2353 goto error;
2354
2355 free(str);
2356 }
2357 ff->ph->env.nr_numa_nodes = nr;
2358 ff->ph->env.numa_nodes = nodes;
2359 return 0;
2360
2361error:
2362 free(nodes);
2363 return -1;
2364}
2365
2366static int process_pmu_mappings(struct feat_fd *ff, void *data __maybe_unused)
2367{
2368 char *name;
2369 u32 pmu_num;
2370 u32 type;
2371 struct strbuf sb;
2372
2373 if (do_read_u32(ff, &pmu_num))
2374 return -1;
2375
2376 if (!pmu_num) {
2377 pr_debug("pmu mappings not available\n");
2378 return 0;
2379 }
2380
2381 ff->ph->env.nr_pmu_mappings = pmu_num;
2382 if (strbuf_init(&sb, 128) < 0)
2383 return -1;
2384
2385 while (pmu_num) {
2386 if (do_read_u32(ff, &type))
2387 goto error;
2388
2389 name = do_read_string(ff);
2390 if (!name)
2391 goto error;
2392
2393 if (strbuf_addf(&sb, "%u:%s", type, name) < 0)
2394 goto error;
2395
2396 if (strbuf_add(&sb, "", 1) < 0)
2397 goto error;
2398
2399 if (!strcmp(name, "msr"))
2400 ff->ph->env.msr_pmu_type = type;
2401
2402 free(name);
2403 pmu_num--;
2404 }
2405 ff->ph->env.pmu_mappings = strbuf_detach(&sb, NULL);
2406 return 0;
2407
2408error:
2409 strbuf_release(&sb);
2410 return -1;
2411}
2412
2413static int process_group_desc(struct feat_fd *ff, void *data __maybe_unused)
2414{
2415 size_t ret = -1;
2416 u32 i, nr, nr_groups;
2417 struct perf_session *session;
2418 struct perf_evsel *evsel, *leader = NULL;
2419 struct group_desc {
2420 char *name;
2421 u32 leader_idx;
2422 u32 nr_members;
2423 } *desc;
2424
2425 if (do_read_u32(ff, &nr_groups))
2426 return -1;
2427
2428 ff->ph->env.nr_groups = nr_groups;
2429 if (!nr_groups) {
2430 pr_debug("group desc not available\n");
2431 return 0;
2432 }
2433
2434 desc = calloc(nr_groups, sizeof(*desc));
2435 if (!desc)
2436 return -1;
2437
2438 for (i = 0; i < nr_groups; i++) {
2439 desc[i].name = do_read_string(ff);
2440 if (!desc[i].name)
2441 goto out_free;
2442
2443 if (do_read_u32(ff, &desc[i].leader_idx))
2444 goto out_free;
2445
2446 if (do_read_u32(ff, &desc[i].nr_members))
2447 goto out_free;
2448 }
2449
2450
2451
2452
2453 session = container_of(ff->ph, struct perf_session, header);
2454 session->evlist->nr_groups = nr_groups;
2455
2456 i = nr = 0;
2457 evlist__for_each_entry(session->evlist, evsel) {
2458 if (evsel->idx == (int) desc[i].leader_idx) {
2459 evsel->leader = evsel;
2460
2461 if (strcmp(desc[i].name, "{anon_group}")) {
2462 evsel->group_name = desc[i].name;
2463 desc[i].name = NULL;
2464 }
2465 evsel->nr_members = desc[i].nr_members;
2466
2467 if (i >= nr_groups || nr > 0) {
2468 pr_debug("invalid group desc\n");
2469 goto out_free;
2470 }
2471
2472 leader = evsel;
2473 nr = evsel->nr_members - 1;
2474 i++;
2475 } else if (nr) {
2476
2477 evsel->leader = leader;
2478
2479 nr--;
2480 }
2481 }
2482
2483 if (i != nr_groups || nr != 0) {
2484 pr_debug("invalid group desc\n");
2485 goto out_free;
2486 }
2487
2488 ret = 0;
2489out_free:
2490 for (i = 0; i < nr_groups; i++)
2491 zfree(&desc[i].name);
2492 free(desc);
2493
2494 return ret;
2495}
2496
2497static int process_auxtrace(struct feat_fd *ff, void *data __maybe_unused)
2498{
2499 struct perf_session *session;
2500 int err;
2501
2502 session = container_of(ff->ph, struct perf_session, header);
2503
2504 err = auxtrace_index__process(ff->fd, ff->size, session,
2505 ff->ph->needs_swap);
2506 if (err < 0)
2507 pr_err("Failed to process auxtrace index\n");
2508 return err;
2509}
2510
2511static int process_cache(struct feat_fd *ff, void *data __maybe_unused)
2512{
2513 struct cpu_cache_level *caches;
2514 u32 cnt, i, version;
2515
2516 if (do_read_u32(ff, &version))
2517 return -1;
2518
2519 if (version != 1)
2520 return -1;
2521
2522 if (do_read_u32(ff, &cnt))
2523 return -1;
2524
2525 caches = zalloc(sizeof(*caches) * cnt);
2526 if (!caches)
2527 return -1;
2528
2529 for (i = 0; i < cnt; i++) {
2530 struct cpu_cache_level c;
2531
2532 #define _R(v) \
2533 if (do_read_u32(ff, &c.v))\
2534 goto out_free_caches; \
2535
2536 _R(level)
2537 _R(line_size)
2538 _R(sets)
2539 _R(ways)
2540 #undef _R
2541
2542 #define _R(v) \
2543 c.v = do_read_string(ff); \
2544 if (!c.v) \
2545 goto out_free_caches;
2546
2547 _R(type)
2548 _R(size)
2549 _R(map)
2550 #undef _R
2551
2552 caches[i] = c;
2553 }
2554
2555 ff->ph->env.caches = caches;
2556 ff->ph->env.caches_cnt = cnt;
2557 return 0;
2558out_free_caches:
2559 free(caches);
2560 return -1;
2561}
2562
2563static int process_sample_time(struct feat_fd *ff, void *data __maybe_unused)
2564{
2565 struct perf_session *session;
2566 u64 first_sample_time, last_sample_time;
2567 int ret;
2568
2569 session = container_of(ff->ph, struct perf_session, header);
2570
2571 ret = do_read_u64(ff, &first_sample_time);
2572 if (ret)
2573 return -1;
2574
2575 ret = do_read_u64(ff, &last_sample_time);
2576 if (ret)
2577 return -1;
2578
2579 session->evlist->first_sample_time = first_sample_time;
2580 session->evlist->last_sample_time = last_sample_time;
2581 return 0;
2582}
2583
2584static int process_mem_topology(struct feat_fd *ff,
2585 void *data __maybe_unused)
2586{
2587 struct memory_node *nodes;
2588 u64 version, i, nr, bsize;
2589 int ret = -1;
2590
2591 if (do_read_u64(ff, &version))
2592 return -1;
2593
2594 if (version != 1)
2595 return -1;
2596
2597 if (do_read_u64(ff, &bsize))
2598 return -1;
2599
2600 if (do_read_u64(ff, &nr))
2601 return -1;
2602
2603 nodes = zalloc(sizeof(*nodes) * nr);
2604 if (!nodes)
2605 return -1;
2606
2607 for (i = 0; i < nr; i++) {
2608 struct memory_node n;
2609
2610 #define _R(v) \
2611 if (do_read_u64(ff, &n.v)) \
2612 goto out; \
2613
2614 _R(node)
2615 _R(size)
2616
2617 #undef _R
2618
2619 if (do_read_bitmap(ff, &n.set, &n.size))
2620 goto out;
2621
2622 nodes[i] = n;
2623 }
2624
2625 ff->ph->env.memory_bsize = bsize;
2626 ff->ph->env.memory_nodes = nodes;
2627 ff->ph->env.nr_memory_nodes = nr;
2628 ret = 0;
2629
2630out:
2631 if (ret)
2632 free(nodes);
2633 return ret;
2634}
2635
2636static int process_clockid(struct feat_fd *ff,
2637 void *data __maybe_unused)
2638{
2639 if (do_read_u64(ff, &ff->ph->env.clockid_res_ns))
2640 return -1;
2641
2642 return 0;
2643}
2644
2645static int process_dir_format(struct feat_fd *ff,
2646 void *_data __maybe_unused)
2647{
2648 struct perf_session *session;
2649 struct perf_data *data;
2650
2651 session = container_of(ff->ph, struct perf_session, header);
2652 data = session->data;
2653
2654 if (WARN_ON(!perf_data__is_dir(data)))
2655 return -1;
2656
2657 return do_read_u64(ff, &data->dir.version);
2658}
2659
2660#ifdef HAVE_LIBBPF_SUPPORT
2661static int process_bpf_prog_info(struct feat_fd *ff, void *data __maybe_unused)
2662{
2663 struct bpf_prog_info_linear *info_linear;
2664 struct bpf_prog_info_node *info_node;
2665 struct perf_env *env = &ff->ph->env;
2666 u32 count, i;
2667 int err = -1;
2668
2669 if (ff->ph->needs_swap) {
2670 pr_warning("interpreting bpf_prog_info from systems with endianity is not yet supported\n");
2671 return 0;
2672 }
2673
2674 if (do_read_u32(ff, &count))
2675 return -1;
2676
2677 down_write(&env->bpf_progs.lock);
2678
2679 for (i = 0; i < count; ++i) {
2680 u32 info_len, data_len;
2681
2682 info_linear = NULL;
2683 info_node = NULL;
2684 if (do_read_u32(ff, &info_len))
2685 goto out;
2686 if (do_read_u32(ff, &data_len))
2687 goto out;
2688
2689 if (info_len > sizeof(struct bpf_prog_info)) {
2690 pr_warning("detected invalid bpf_prog_info\n");
2691 goto out;
2692 }
2693
2694 info_linear = malloc(sizeof(struct bpf_prog_info_linear) +
2695 data_len);
2696 if (!info_linear)
2697 goto out;
2698 info_linear->info_len = sizeof(struct bpf_prog_info);
2699 info_linear->data_len = data_len;
2700 if (do_read_u64(ff, (u64 *)(&info_linear->arrays)))
2701 goto out;
2702 if (__do_read(ff, &info_linear->info, info_len))
2703 goto out;
2704 if (info_len < sizeof(struct bpf_prog_info))
2705 memset(((void *)(&info_linear->info)) + info_len, 0,
2706 sizeof(struct bpf_prog_info) - info_len);
2707
2708 if (__do_read(ff, info_linear->data, data_len))
2709 goto out;
2710
2711 info_node = malloc(sizeof(struct bpf_prog_info_node));
2712 if (!info_node)
2713 goto out;
2714
2715
2716 bpf_program__bpil_offs_to_addr(info_linear);
2717 info_node->info_linear = info_linear;
2718 perf_env__insert_bpf_prog_info(env, info_node);
2719 }
2720
2721 up_write(&env->bpf_progs.lock);
2722 return 0;
2723out:
2724 free(info_linear);
2725 free(info_node);
2726 up_write(&env->bpf_progs.lock);
2727 return err;
2728}
2729#else
2730static int process_bpf_prog_info(struct feat_fd *ff __maybe_unused, void *data __maybe_unused)
2731{
2732 return 0;
2733}
2734#endif
2735
2736static int process_bpf_btf(struct feat_fd *ff, void *data __maybe_unused)
2737{
2738 struct perf_env *env = &ff->ph->env;
2739 struct btf_node *node = NULL;
2740 u32 count, i;
2741 int err = -1;
2742
2743 if (ff->ph->needs_swap) {
2744 pr_warning("interpreting btf from systems with endianity is not yet supported\n");
2745 return 0;
2746 }
2747
2748 if (do_read_u32(ff, &count))
2749 return -1;
2750
2751 down_write(&env->bpf_progs.lock);
2752
2753 for (i = 0; i < count; ++i) {
2754 u32 id, data_size;
2755
2756 if (do_read_u32(ff, &id))
2757 goto out;
2758 if (do_read_u32(ff, &data_size))
2759 goto out;
2760
2761 node = malloc(sizeof(struct btf_node) + data_size);
2762 if (!node)
2763 goto out;
2764
2765 node->id = id;
2766 node->data_size = data_size;
2767
2768 if (__do_read(ff, node->data, data_size))
2769 goto out;
2770
2771 perf_env__insert_btf(env, node);
2772 node = NULL;
2773 }
2774
2775 err = 0;
2776out:
2777 up_write(&env->bpf_progs.lock);
2778 free(node);
2779 return err;
2780}
2781
2782static int process_compressed(struct feat_fd *ff,
2783 void *data __maybe_unused)
2784{
2785 if (do_read_u32(ff, &(ff->ph->env.comp_ver)))
2786 return -1;
2787
2788 if (do_read_u32(ff, &(ff->ph->env.comp_type)))
2789 return -1;
2790
2791 if (do_read_u32(ff, &(ff->ph->env.comp_level)))
2792 return -1;
2793
2794 if (do_read_u32(ff, &(ff->ph->env.comp_ratio)))
2795 return -1;
2796
2797 if (do_read_u32(ff, &(ff->ph->env.comp_mmap_len)))
2798 return -1;
2799
2800 return 0;
2801}
2802
2803struct feature_ops {
2804 int (*write)(struct feat_fd *ff, struct perf_evlist *evlist);
2805 void (*print)(struct feat_fd *ff, FILE *fp);
2806 int (*process)(struct feat_fd *ff, void *data);
2807 const char *name;
2808 bool full_only;
2809 bool synthesize;
2810};
2811
2812#define FEAT_OPR(n, func, __full_only) \
2813 [HEADER_##n] = { \
2814 .name = __stringify(n), \
2815 .write = write_##func, \
2816 .print = print_##func, \
2817 .full_only = __full_only, \
2818 .process = process_##func, \
2819 .synthesize = true \
2820 }
2821
2822#define FEAT_OPN(n, func, __full_only) \
2823 [HEADER_##n] = { \
2824 .name = __stringify(n), \
2825 .write = write_##func, \
2826 .print = print_##func, \
2827 .full_only = __full_only, \
2828 .process = process_##func \
2829 }
2830
2831
2832#define print_tracing_data NULL
2833#define print_build_id NULL
2834
2835#define process_branch_stack NULL
2836#define process_stat NULL
2837
2838
2839static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
2840 FEAT_OPN(TRACING_DATA, tracing_data, false),
2841 FEAT_OPN(BUILD_ID, build_id, false),
2842 FEAT_OPR(HOSTNAME, hostname, false),
2843 FEAT_OPR(OSRELEASE, osrelease, false),
2844 FEAT_OPR(VERSION, version, false),
2845 FEAT_OPR(ARCH, arch, false),
2846 FEAT_OPR(NRCPUS, nrcpus, false),
2847 FEAT_OPR(CPUDESC, cpudesc, false),
2848 FEAT_OPR(CPUID, cpuid, false),
2849 FEAT_OPR(TOTAL_MEM, total_mem, false),
2850 FEAT_OPR(EVENT_DESC, event_desc, false),
2851 FEAT_OPR(CMDLINE, cmdline, false),
2852 FEAT_OPR(CPU_TOPOLOGY, cpu_topology, true),
2853 FEAT_OPR(NUMA_TOPOLOGY, numa_topology, true),
2854 FEAT_OPN(BRANCH_STACK, branch_stack, false),
2855 FEAT_OPR(PMU_MAPPINGS, pmu_mappings, false),
2856 FEAT_OPR(GROUP_DESC, group_desc, false),
2857 FEAT_OPN(AUXTRACE, auxtrace, false),
2858 FEAT_OPN(STAT, stat, false),
2859 FEAT_OPN(CACHE, cache, true),
2860 FEAT_OPR(SAMPLE_TIME, sample_time, false),
2861 FEAT_OPR(MEM_TOPOLOGY, mem_topology, true),
2862 FEAT_OPR(CLOCKID, clockid, false),
2863 FEAT_OPN(DIR_FORMAT, dir_format, false),
2864 FEAT_OPR(BPF_PROG_INFO, bpf_prog_info, false),
2865 FEAT_OPR(BPF_BTF, bpf_btf, false),
2866 FEAT_OPR(COMPRESSED, compressed, false),
2867};
2868
2869struct header_print_data {
2870 FILE *fp;
2871 bool full;
2872};
2873
2874static int perf_file_section__fprintf_info(struct perf_file_section *section,
2875 struct perf_header *ph,
2876 int feat, int fd, void *data)
2877{
2878 struct header_print_data *hd = data;
2879 struct feat_fd ff;
2880
2881 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
2882 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
2883 "%d, continuing...\n", section->offset, feat);
2884 return 0;
2885 }
2886 if (feat >= HEADER_LAST_FEATURE) {
2887 pr_warning("unknown feature %d\n", feat);
2888 return 0;
2889 }
2890 if (!feat_ops[feat].print)
2891 return 0;
2892
2893 ff = (struct feat_fd) {
2894 .fd = fd,
2895 .ph = ph,
2896 };
2897
2898 if (!feat_ops[feat].full_only || hd->full)
2899 feat_ops[feat].print(&ff, hd->fp);
2900 else
2901 fprintf(hd->fp, "# %s info available, use -I to display\n",
2902 feat_ops[feat].name);
2903
2904 return 0;
2905}
2906
2907int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
2908{
2909 struct header_print_data hd;
2910 struct perf_header *header = &session->header;
2911 int fd = perf_data__fd(session->data);
2912 struct stat st;
2913 time_t stctime;
2914 int ret, bit;
2915
2916 hd.fp = fp;
2917 hd.full = full;
2918
2919 ret = fstat(fd, &st);
2920 if (ret == -1)
2921 return -1;
2922
2923 stctime = st.st_ctime;
2924 fprintf(fp, "# captured on : %s", ctime(&stctime));
2925
2926 fprintf(fp, "# header version : %u\n", header->version);
2927 fprintf(fp, "# data offset : %" PRIu64 "\n", header->data_offset);
2928 fprintf(fp, "# data size : %" PRIu64 "\n", header->data_size);
2929 fprintf(fp, "# feat offset : %" PRIu64 "\n", header->feat_offset);
2930
2931 perf_header__process_sections(header, fd, &hd,
2932 perf_file_section__fprintf_info);
2933
2934 if (session->data->is_pipe)
2935 return 0;
2936
2937 fprintf(fp, "# missing features: ");
2938 for_each_clear_bit(bit, header->adds_features, HEADER_LAST_FEATURE) {
2939 if (bit)
2940 fprintf(fp, "%s ", feat_ops[bit].name);
2941 }
2942
2943 fprintf(fp, "\n");
2944 return 0;
2945}
2946
2947static int do_write_feat(struct feat_fd *ff, int type,
2948 struct perf_file_section **p,
2949 struct perf_evlist *evlist)
2950{
2951 int err;
2952 int ret = 0;
2953
2954 if (perf_header__has_feat(ff->ph, type)) {
2955 if (!feat_ops[type].write)
2956 return -1;
2957
2958 if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__))
2959 return -1;
2960
2961 (*p)->offset = lseek(ff->fd, 0, SEEK_CUR);
2962
2963 err = feat_ops[type].write(ff, evlist);
2964 if (err < 0) {
2965 pr_debug("failed to write feature %s\n", feat_ops[type].name);
2966
2967
2968 lseek(ff->fd, (*p)->offset, SEEK_SET);
2969
2970 return -1;
2971 }
2972 (*p)->size = lseek(ff->fd, 0, SEEK_CUR) - (*p)->offset;
2973 (*p)++;
2974 }
2975 return ret;
2976}
2977
2978static int perf_header__adds_write(struct perf_header *header,
2979 struct perf_evlist *evlist, int fd)
2980{
2981 int nr_sections;
2982 struct feat_fd ff;
2983 struct perf_file_section *feat_sec, *p;
2984 int sec_size;
2985 u64 sec_start;
2986 int feat;
2987 int err;
2988
2989 ff = (struct feat_fd){
2990 .fd = fd,
2991 .ph = header,
2992 };
2993
2994 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
2995 if (!nr_sections)
2996 return 0;
2997
2998 feat_sec = p = calloc(nr_sections, sizeof(*feat_sec));
2999 if (feat_sec == NULL)
3000 return -ENOMEM;
3001
3002 sec_size = sizeof(*feat_sec) * nr_sections;
3003
3004 sec_start = header->feat_offset;
3005 lseek(fd, sec_start + sec_size, SEEK_SET);
3006
3007 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
3008 if (do_write_feat(&ff, feat, &p, evlist))
3009 perf_header__clear_feat(header, feat);
3010 }
3011
3012 lseek(fd, sec_start, SEEK_SET);
3013
3014
3015
3016
3017 err = do_write(&ff, feat_sec, sec_size);
3018 if (err < 0)
3019 pr_debug("failed to write feature section\n");
3020 free(feat_sec);
3021 return err;
3022}
3023
3024int perf_header__write_pipe(int fd)
3025{
3026 struct perf_pipe_file_header f_header;
3027 struct feat_fd ff;
3028 int err;
3029
3030 ff = (struct feat_fd){ .fd = fd };
3031
3032 f_header = (struct perf_pipe_file_header){
3033 .magic = PERF_MAGIC,
3034 .size = sizeof(f_header),
3035 };
3036
3037 err = do_write(&ff, &f_header, sizeof(f_header));
3038 if (err < 0) {
3039 pr_debug("failed to write perf pipe header\n");
3040 return err;
3041 }
3042
3043 return 0;
3044}
3045
3046int perf_session__write_header(struct perf_session *session,
3047 struct perf_evlist *evlist,
3048 int fd, bool at_exit)
3049{
3050 struct perf_file_header f_header;
3051 struct perf_file_attr f_attr;
3052 struct perf_header *header = &session->header;
3053 struct perf_evsel *evsel;
3054 struct feat_fd ff;
3055 u64 attr_offset;
3056 int err;
3057
3058 ff = (struct feat_fd){ .fd = fd};
3059 lseek(fd, sizeof(f_header), SEEK_SET);
3060
3061 evlist__for_each_entry(session->evlist, evsel) {
3062 evsel->id_offset = lseek(fd, 0, SEEK_CUR);
3063 err = do_write(&ff, evsel->id, evsel->ids * sizeof(u64));
3064 if (err < 0) {
3065 pr_debug("failed to write perf header\n");
3066 return err;
3067 }
3068 }
3069
3070 attr_offset = lseek(ff.fd, 0, SEEK_CUR);
3071
3072 evlist__for_each_entry(evlist, evsel) {
3073 f_attr = (struct perf_file_attr){
3074 .attr = evsel->attr,
3075 .ids = {
3076 .offset = evsel->id_offset,
3077 .size = evsel->ids * sizeof(u64),
3078 }
3079 };
3080 err = do_write(&ff, &f_attr, sizeof(f_attr));
3081 if (err < 0) {
3082 pr_debug("failed to write perf header attribute\n");
3083 return err;
3084 }
3085 }
3086
3087 if (!header->data_offset)
3088 header->data_offset = lseek(fd, 0, SEEK_CUR);
3089 header->feat_offset = header->data_offset + header->data_size;
3090
3091 if (at_exit) {
3092 err = perf_header__adds_write(header, evlist, fd);
3093 if (err < 0)
3094 return err;
3095 }
3096
3097 f_header = (struct perf_file_header){
3098 .magic = PERF_MAGIC,
3099 .size = sizeof(f_header),
3100 .attr_size = sizeof(f_attr),
3101 .attrs = {
3102 .offset = attr_offset,
3103 .size = evlist->nr_entries * sizeof(f_attr),
3104 },
3105 .data = {
3106 .offset = header->data_offset,
3107 .size = header->data_size,
3108 },
3109
3110 };
3111
3112 memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features));
3113
3114 lseek(fd, 0, SEEK_SET);
3115 err = do_write(&ff, &f_header, sizeof(f_header));
3116 if (err < 0) {
3117 pr_debug("failed to write perf header\n");
3118 return err;
3119 }
3120 lseek(fd, header->data_offset + header->data_size, SEEK_SET);
3121
3122 return 0;
3123}
3124
3125static int perf_header__getbuffer64(struct perf_header *header,
3126 int fd, void *buf, size_t size)
3127{
3128 if (readn(fd, buf, size) <= 0)
3129 return -1;
3130
3131 if (header->needs_swap)
3132 mem_bswap_64(buf, size);
3133
3134 return 0;
3135}
3136
3137int perf_header__process_sections(struct perf_header *header, int fd,
3138 void *data,
3139 int (*process)(struct perf_file_section *section,
3140 struct perf_header *ph,
3141 int feat, int fd, void *data))
3142{
3143 struct perf_file_section *feat_sec, *sec;
3144 int nr_sections;
3145 int sec_size;
3146 int feat;
3147 int err;
3148
3149 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
3150 if (!nr_sections)
3151 return 0;
3152
3153 feat_sec = sec = calloc(nr_sections, sizeof(*feat_sec));
3154 if (!feat_sec)
3155 return -1;
3156
3157 sec_size = sizeof(*feat_sec) * nr_sections;
3158
3159 lseek(fd, header->feat_offset, SEEK_SET);
3160
3161 err = perf_header__getbuffer64(header, fd, feat_sec, sec_size);
3162 if (err < 0)
3163 goto out_free;
3164
3165 for_each_set_bit(feat, header->adds_features, HEADER_LAST_FEATURE) {
3166 err = process(sec++, header, feat, fd, data);
3167 if (err < 0)
3168 goto out_free;
3169 }
3170 err = 0;
3171out_free:
3172 free(feat_sec);
3173 return err;
3174}
3175
3176static const int attr_file_abi_sizes[] = {
3177 [0] = PERF_ATTR_SIZE_VER0,
3178 [1] = PERF_ATTR_SIZE_VER1,
3179 [2] = PERF_ATTR_SIZE_VER2,
3180 [3] = PERF_ATTR_SIZE_VER3,
3181 [4] = PERF_ATTR_SIZE_VER4,
3182 0,
3183};
3184
3185
3186
3187
3188
3189
3190
3191static int try_all_file_abis(uint64_t hdr_sz, struct perf_header *ph)
3192{
3193 uint64_t ref_size, attr_size;
3194 int i;
3195
3196 for (i = 0 ; attr_file_abi_sizes[i]; i++) {
3197 ref_size = attr_file_abi_sizes[i]
3198 + sizeof(struct perf_file_section);
3199 if (hdr_sz != ref_size) {
3200 attr_size = bswap_64(hdr_sz);
3201 if (attr_size != ref_size)
3202 continue;
3203
3204 ph->needs_swap = true;
3205 }
3206 pr_debug("ABI%d perf.data file detected, need_swap=%d\n",
3207 i,
3208 ph->needs_swap);
3209 return 0;
3210 }
3211
3212 return -1;
3213}
3214
3215#define PERF_PIPE_HDR_VER0 16
3216
3217static const size_t attr_pipe_abi_sizes[] = {
3218 [0] = PERF_PIPE_HDR_VER0,
3219 0,
3220};
3221
3222
3223
3224
3225
3226
3227
3228
3229static int try_all_pipe_abis(uint64_t hdr_sz, struct perf_header *ph)
3230{
3231 u64 attr_size;
3232 int i;
3233
3234 for (i = 0 ; attr_pipe_abi_sizes[i]; i++) {
3235 if (hdr_sz != attr_pipe_abi_sizes[i]) {
3236 attr_size = bswap_64(hdr_sz);
3237 if (attr_size != hdr_sz)
3238 continue;
3239
3240 ph->needs_swap = true;
3241 }
3242 pr_debug("Pipe ABI%d perf.data file detected\n", i);
3243 return 0;
3244 }
3245 return -1;
3246}
3247
3248bool is_perf_magic(u64 magic)
3249{
3250 if (!memcmp(&magic, __perf_magic1, sizeof(magic))
3251 || magic == __perf_magic2
3252 || magic == __perf_magic2_sw)
3253 return true;
3254
3255 return false;
3256}
3257
3258static int check_magic_endian(u64 magic, uint64_t hdr_sz,
3259 bool is_pipe, struct perf_header *ph)
3260{
3261 int ret;
3262
3263
3264 ret = memcmp(&magic, __perf_magic1, sizeof(magic));
3265 if (ret == 0) {
3266 ph->version = PERF_HEADER_VERSION_1;
3267 pr_debug("legacy perf.data format\n");
3268 if (is_pipe)
3269 return try_all_pipe_abis(hdr_sz, ph);
3270
3271 return try_all_file_abis(hdr_sz, ph);
3272 }
3273
3274
3275
3276
3277
3278 ph->version = PERF_HEADER_VERSION_2;
3279
3280
3281 if (magic == __perf_magic2)
3282 return 0;
3283
3284
3285 if (magic != __perf_magic2_sw)
3286 return -1;
3287
3288 ph->needs_swap = true;
3289
3290 return 0;
3291}
3292
3293int perf_file_header__read(struct perf_file_header *header,
3294 struct perf_header *ph, int fd)
3295{
3296 ssize_t ret;
3297
3298 lseek(fd, 0, SEEK_SET);
3299
3300 ret = readn(fd, header, sizeof(*header));
3301 if (ret <= 0)
3302 return -1;
3303
3304 if (check_magic_endian(header->magic,
3305 header->attr_size, false, ph) < 0) {
3306 pr_debug("magic/endian check failed\n");
3307 return -1;
3308 }
3309
3310 if (ph->needs_swap) {
3311 mem_bswap_64(header, offsetof(struct perf_file_header,
3312 adds_features));
3313 }
3314
3315 if (header->size != sizeof(*header)) {
3316
3317 if (header->size == offsetof(typeof(*header), adds_features))
3318 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
3319 else
3320 return -1;
3321 } else if (ph->needs_swap) {
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337 mem_bswap_64(&header->adds_features,
3338 BITS_TO_U64(HEADER_FEAT_BITS));
3339
3340 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
3341
3342 mem_bswap_64(&header->adds_features,
3343 BITS_TO_U64(HEADER_FEAT_BITS));
3344
3345
3346 mem_bswap_32(&header->adds_features,
3347 BITS_TO_U32(HEADER_FEAT_BITS));
3348 }
3349
3350 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
3351 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
3352 set_bit(HEADER_BUILD_ID, header->adds_features);
3353 }
3354 }
3355
3356 memcpy(&ph->adds_features, &header->adds_features,
3357 sizeof(ph->adds_features));
3358
3359 ph->data_offset = header->data.offset;
3360 ph->data_size = header->data.size;
3361 ph->feat_offset = header->data.offset + header->data.size;
3362 return 0;
3363}
3364
3365static int perf_file_section__process(struct perf_file_section *section,
3366 struct perf_header *ph,
3367 int feat, int fd, void *data)
3368{
3369 struct feat_fd fdd = {
3370 .fd = fd,
3371 .ph = ph,
3372 .size = section->size,
3373 .offset = section->offset,
3374 };
3375
3376 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
3377 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
3378 "%d, continuing...\n", section->offset, feat);
3379 return 0;
3380 }
3381
3382 if (feat >= HEADER_LAST_FEATURE) {
3383 pr_debug("unknown feature %d, continuing...\n", feat);
3384 return 0;
3385 }
3386
3387 if (!feat_ops[feat].process)
3388 return 0;
3389
3390 return feat_ops[feat].process(&fdd, data);
3391}
3392
3393static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
3394 struct perf_header *ph, int fd,
3395 bool repipe)
3396{
3397 struct feat_fd ff = {
3398 .fd = STDOUT_FILENO,
3399 .ph = ph,
3400 };
3401 ssize_t ret;
3402
3403 ret = readn(fd, header, sizeof(*header));
3404 if (ret <= 0)
3405 return -1;
3406
3407 if (check_magic_endian(header->magic, header->size, true, ph) < 0) {
3408 pr_debug("endian/magic failed\n");
3409 return -1;
3410 }
3411
3412 if (ph->needs_swap)
3413 header->size = bswap_64(header->size);
3414
3415 if (repipe && do_write(&ff, header, sizeof(*header)) < 0)
3416 return -1;
3417
3418 return 0;
3419}
3420
3421static int perf_header__read_pipe(struct perf_session *session)
3422{
3423 struct perf_header *header = &session->header;
3424 struct perf_pipe_file_header f_header;
3425
3426 if (perf_file_header__read_pipe(&f_header, header,
3427 perf_data__fd(session->data),
3428 session->repipe) < 0) {
3429 pr_debug("incompatible file format\n");
3430 return -EINVAL;
3431 }
3432
3433 return 0;
3434}
3435
3436static int read_attr(int fd, struct perf_header *ph,
3437 struct perf_file_attr *f_attr)
3438{
3439 struct perf_event_attr *attr = &f_attr->attr;
3440 size_t sz, left;
3441 size_t our_sz = sizeof(f_attr->attr);
3442 ssize_t ret;
3443
3444 memset(f_attr, 0, sizeof(*f_attr));
3445
3446
3447 ret = readn(fd, attr, PERF_ATTR_SIZE_VER0);
3448 if (ret <= 0) {
3449 pr_debug("cannot read %d bytes of header attr\n",
3450 PERF_ATTR_SIZE_VER0);
3451 return -1;
3452 }
3453
3454
3455 sz = attr->size;
3456
3457 if (ph->needs_swap)
3458 sz = bswap_32(sz);
3459
3460 if (sz == 0) {
3461
3462 sz = PERF_ATTR_SIZE_VER0;
3463 } else if (sz > our_sz) {
3464 pr_debug("file uses a more recent and unsupported ABI"
3465 " (%zu bytes extra)\n", sz - our_sz);
3466 return -1;
3467 }
3468
3469 left = sz - PERF_ATTR_SIZE_VER0;
3470 if (left) {
3471 void *ptr = attr;
3472 ptr += PERF_ATTR_SIZE_VER0;
3473
3474 ret = readn(fd, ptr, left);
3475 }
3476
3477 ret = readn(fd, &f_attr->ids, sizeof(f_attr->ids));
3478
3479 return ret <= 0 ? -1 : 0;
3480}
3481
3482static int perf_evsel__prepare_tracepoint_event(struct perf_evsel *evsel,
3483 struct tep_handle *pevent)
3484{
3485 struct tep_event *event;
3486 char bf[128];
3487
3488
3489 if (evsel->tp_format)
3490 return 0;
3491
3492 if (pevent == NULL) {
3493 pr_debug("broken or missing trace data\n");
3494 return -1;
3495 }
3496
3497 event = tep_find_event(pevent, evsel->attr.config);
3498 if (event == NULL) {
3499 pr_debug("cannot find event format for %d\n", (int)evsel->attr.config);
3500 return -1;
3501 }
3502
3503 if (!evsel->name) {
3504 snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name);
3505 evsel->name = strdup(bf);
3506 if (evsel->name == NULL)
3507 return -1;
3508 }
3509
3510 evsel->tp_format = event;
3511 return 0;
3512}
3513
3514static int perf_evlist__prepare_tracepoint_events(struct perf_evlist *evlist,
3515 struct tep_handle *pevent)
3516{
3517 struct perf_evsel *pos;
3518
3519 evlist__for_each_entry(evlist, pos) {
3520 if (pos->attr.type == PERF_TYPE_TRACEPOINT &&
3521 perf_evsel__prepare_tracepoint_event(pos, pevent))
3522 return -1;
3523 }
3524
3525 return 0;
3526}
3527
3528int perf_session__read_header(struct perf_session *session)
3529{
3530 struct perf_data *data = session->data;
3531 struct perf_header *header = &session->header;
3532 struct perf_file_header f_header;
3533 struct perf_file_attr f_attr;
3534 u64 f_id;
3535 int nr_attrs, nr_ids, i, j;
3536 int fd = perf_data__fd(data);
3537
3538 session->evlist = perf_evlist__new();
3539 if (session->evlist == NULL)
3540 return -ENOMEM;
3541
3542 session->evlist->env = &header->env;
3543 session->machines.host.env = &header->env;
3544 if (perf_data__is_pipe(data))
3545 return perf_header__read_pipe(session);
3546
3547 if (perf_file_header__read(&f_header, header, fd) < 0)
3548 return -EINVAL;
3549
3550
3551
3552
3553
3554
3555
3556 if (f_header.data.size == 0) {
3557 pr_warning("WARNING: The %s file's data size field is 0 which is unexpected.\n"
3558 "Was the 'perf record' command properly terminated?\n",
3559 data->file.path);
3560 }
3561
3562 if (f_header.attr_size == 0) {
3563 pr_err("ERROR: The %s file's attr size field is 0 which is unexpected.\n"
3564 "Was the 'perf record' command properly terminated?\n",
3565 data->file.path);
3566 return -EINVAL;
3567 }
3568
3569 nr_attrs = f_header.attrs.size / f_header.attr_size;
3570 lseek(fd, f_header.attrs.offset, SEEK_SET);
3571
3572 for (i = 0; i < nr_attrs; i++) {
3573 struct perf_evsel *evsel;
3574 off_t tmp;
3575
3576 if (read_attr(fd, header, &f_attr) < 0)
3577 goto out_errno;
3578
3579 if (header->needs_swap) {
3580 f_attr.ids.size = bswap_64(f_attr.ids.size);
3581 f_attr.ids.offset = bswap_64(f_attr.ids.offset);
3582 perf_event__attr_swap(&f_attr.attr);
3583 }
3584
3585 tmp = lseek(fd, 0, SEEK_CUR);
3586 evsel = perf_evsel__new(&f_attr.attr);
3587
3588 if (evsel == NULL)
3589 goto out_delete_evlist;
3590
3591 evsel->needs_swap = header->needs_swap;
3592
3593
3594
3595
3596 perf_evlist__add(session->evlist, evsel);
3597
3598 nr_ids = f_attr.ids.size / sizeof(u64);
3599
3600
3601
3602
3603
3604 if (perf_evsel__alloc_id(evsel, 1, nr_ids))
3605 goto out_delete_evlist;
3606
3607 lseek(fd, f_attr.ids.offset, SEEK_SET);
3608
3609 for (j = 0; j < nr_ids; j++) {
3610 if (perf_header__getbuffer64(header, fd, &f_id, sizeof(f_id)))
3611 goto out_errno;
3612
3613 perf_evlist__id_add(session->evlist, evsel, 0, j, f_id);
3614 }
3615
3616 lseek(fd, tmp, SEEK_SET);
3617 }
3618
3619 perf_header__process_sections(header, fd, &session->tevent,
3620 perf_file_section__process);
3621
3622 if (perf_evlist__prepare_tracepoint_events(session->evlist,
3623 session->tevent.pevent))
3624 goto out_delete_evlist;
3625
3626 return 0;
3627out_errno:
3628 return -errno;
3629
3630out_delete_evlist:
3631 perf_evlist__delete(session->evlist);
3632 session->evlist = NULL;
3633 return -ENOMEM;
3634}
3635
3636int perf_event__synthesize_attr(struct perf_tool *tool,
3637 struct perf_event_attr *attr, u32 ids, u64 *id,
3638 perf_event__handler_t process)
3639{
3640 union perf_event *ev;
3641 size_t size;
3642 int err;
3643
3644 size = sizeof(struct perf_event_attr);
3645 size = PERF_ALIGN(size, sizeof(u64));
3646 size += sizeof(struct perf_event_header);
3647 size += ids * sizeof(u64);
3648
3649 ev = zalloc(size);
3650
3651 if (ev == NULL)
3652 return -ENOMEM;
3653
3654 ev->attr.attr = *attr;
3655 memcpy(ev->attr.id, id, ids * sizeof(u64));
3656
3657 ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
3658 ev->attr.header.size = (u16)size;
3659
3660 if (ev->attr.header.size == size)
3661 err = process(tool, ev, NULL, NULL);
3662 else
3663 err = -E2BIG;
3664
3665 free(ev);
3666
3667 return err;
3668}
3669
3670int perf_event__synthesize_features(struct perf_tool *tool,
3671 struct perf_session *session,
3672 struct perf_evlist *evlist,
3673 perf_event__handler_t process)
3674{
3675 struct perf_header *header = &session->header;
3676 struct feat_fd ff;
3677 struct feature_event *fe;
3678 size_t sz, sz_hdr;
3679 int feat, ret;
3680
3681 sz_hdr = sizeof(fe->header);
3682 sz = sizeof(union perf_event);
3683
3684 sz = PERF_ALIGN(sz, page_size);
3685
3686 memset(&ff, 0, sizeof(ff));
3687
3688 ff.buf = malloc(sz);
3689 if (!ff.buf)
3690 return -ENOMEM;
3691
3692 ff.size = sz - sz_hdr;
3693 ff.ph = &session->header;
3694
3695 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
3696 if (!feat_ops[feat].synthesize) {
3697 pr_debug("No record header feature for header :%d\n", feat);
3698 continue;
3699 }
3700
3701 ff.offset = sizeof(*fe);
3702
3703 ret = feat_ops[feat].write(&ff, evlist);
3704 if (ret || ff.offset <= (ssize_t)sizeof(*fe)) {
3705 pr_debug("Error writing feature\n");
3706 continue;
3707 }
3708
3709 fe = ff.buf;
3710 memset(fe, 0, sizeof(*fe));
3711
3712 fe->feat_id = feat;
3713 fe->header.type = PERF_RECORD_HEADER_FEATURE;
3714 fe->header.size = ff.offset;
3715
3716 ret = process(tool, ff.buf, NULL, NULL);
3717 if (ret) {
3718 free(ff.buf);
3719 return ret;
3720 }
3721 }
3722
3723
3724 fe = ff.buf;
3725 fe->feat_id = HEADER_LAST_FEATURE;
3726 fe->header.type = PERF_RECORD_HEADER_FEATURE;
3727 fe->header.size = sizeof(*fe);
3728
3729 ret = process(tool, ff.buf, NULL, NULL);
3730
3731 free(ff.buf);
3732 return ret;
3733}
3734
3735int perf_event__process_feature(struct perf_session *session,
3736 union perf_event *event)
3737{
3738 struct perf_tool *tool = session->tool;
3739 struct feat_fd ff = { .fd = 0 };
3740 struct feature_event *fe = (struct feature_event *)event;
3741 int type = fe->header.type;
3742 u64 feat = fe->feat_id;
3743
3744 if (type < 0 || type >= PERF_RECORD_HEADER_MAX) {
3745 pr_warning("invalid record type %d in pipe-mode\n", type);
3746 return 0;
3747 }
3748 if (feat == HEADER_RESERVED || feat >= HEADER_LAST_FEATURE) {
3749 pr_warning("invalid record type %d in pipe-mode\n", type);
3750 return -1;
3751 }
3752
3753 if (!feat_ops[feat].process)
3754 return 0;
3755
3756 ff.buf = (void *)fe->data;
3757 ff.size = event->header.size - sizeof(*fe);
3758 ff.ph = &session->header;
3759
3760 if (feat_ops[feat].process(&ff, NULL))
3761 return -1;
3762
3763 if (!feat_ops[feat].print || !tool->show_feat_hdr)
3764 return 0;
3765
3766 if (!feat_ops[feat].full_only ||
3767 tool->show_feat_hdr >= SHOW_FEAT_HEADER_FULL_INFO) {
3768 feat_ops[feat].print(&ff, stdout);
3769 } else {
3770 fprintf(stdout, "# %s info available, use -I to display\n",
3771 feat_ops[feat].name);
3772 }
3773
3774 return 0;
3775}
3776
3777static struct event_update_event *
3778event_update_event__new(size_t size, u64 type, u64 id)
3779{
3780 struct event_update_event *ev;
3781
3782 size += sizeof(*ev);
3783 size = PERF_ALIGN(size, sizeof(u64));
3784
3785 ev = zalloc(size);
3786 if (ev) {
3787 ev->header.type = PERF_RECORD_EVENT_UPDATE;
3788 ev->header.size = (u16)size;
3789 ev->type = type;
3790 ev->id = id;
3791 }
3792 return ev;
3793}
3794
3795int
3796perf_event__synthesize_event_update_unit(struct perf_tool *tool,
3797 struct perf_evsel *evsel,
3798 perf_event__handler_t process)
3799{
3800 struct event_update_event *ev;
3801 size_t size = strlen(evsel->unit);
3802 int err;
3803
3804 ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->id[0]);
3805 if (ev == NULL)
3806 return -ENOMEM;
3807
3808 strlcpy(ev->data, evsel->unit, size + 1);
3809 err = process(tool, (union perf_event *)ev, NULL, NULL);
3810 free(ev);
3811 return err;
3812}
3813
3814int
3815perf_event__synthesize_event_update_scale(struct perf_tool *tool,
3816 struct perf_evsel *evsel,
3817 perf_event__handler_t process)
3818{
3819 struct event_update_event *ev;
3820 struct event_update_event_scale *ev_data;
3821 int err;
3822
3823 ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->id[0]);
3824 if (ev == NULL)
3825 return -ENOMEM;
3826
3827 ev_data = (struct event_update_event_scale *) ev->data;
3828 ev_data->scale = evsel->scale;
3829 err = process(tool, (union perf_event*) ev, NULL, NULL);
3830 free(ev);
3831 return err;
3832}
3833
3834int
3835perf_event__synthesize_event_update_name(struct perf_tool *tool,
3836 struct perf_evsel *evsel,
3837 perf_event__handler_t process)
3838{
3839 struct event_update_event *ev;
3840 size_t len = strlen(evsel->name);
3841 int err;
3842
3843 ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->id[0]);
3844 if (ev == NULL)
3845 return -ENOMEM;
3846
3847 strlcpy(ev->data, evsel->name, len + 1);
3848 err = process(tool, (union perf_event*) ev, NULL, NULL);
3849 free(ev);
3850 return err;
3851}
3852
3853int
3854perf_event__synthesize_event_update_cpus(struct perf_tool *tool,
3855 struct perf_evsel *evsel,
3856 perf_event__handler_t process)
3857{
3858 size_t size = sizeof(struct event_update_event);
3859 struct event_update_event *ev;
3860 int max, err;
3861 u16 type;
3862
3863 if (!evsel->own_cpus)
3864 return 0;
3865
3866 ev = cpu_map_data__alloc(evsel->own_cpus, &size, &type, &max);
3867 if (!ev)
3868 return -ENOMEM;
3869
3870 ev->header.type = PERF_RECORD_EVENT_UPDATE;
3871 ev->header.size = (u16)size;
3872 ev->type = PERF_EVENT_UPDATE__CPUS;
3873 ev->id = evsel->id[0];
3874
3875 cpu_map_data__synthesize((struct cpu_map_data *) ev->data,
3876 evsel->own_cpus,
3877 type, max);
3878
3879 err = process(tool, (union perf_event*) ev, NULL, NULL);
3880 free(ev);
3881 return err;
3882}
3883
3884size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp)
3885{
3886 struct event_update_event *ev = &event->event_update;
3887 struct event_update_event_scale *ev_scale;
3888 struct event_update_event_cpus *ev_cpus;
3889 struct cpu_map *map;
3890 size_t ret;
3891
3892 ret = fprintf(fp, "\n... id: %" PRIu64 "\n", ev->id);
3893
3894 switch (ev->type) {
3895 case PERF_EVENT_UPDATE__SCALE:
3896 ev_scale = (struct event_update_event_scale *) ev->data;
3897 ret += fprintf(fp, "... scale: %f\n", ev_scale->scale);
3898 break;
3899 case PERF_EVENT_UPDATE__UNIT:
3900 ret += fprintf(fp, "... unit: %s\n", ev->data);
3901 break;
3902 case PERF_EVENT_UPDATE__NAME:
3903 ret += fprintf(fp, "... name: %s\n", ev->data);
3904 break;
3905 case PERF_EVENT_UPDATE__CPUS:
3906 ev_cpus = (struct event_update_event_cpus *) ev->data;
3907 ret += fprintf(fp, "... ");
3908
3909 map = cpu_map__new_data(&ev_cpus->cpus);
3910 if (map)
3911 ret += cpu_map__fprintf(map, fp);
3912 else
3913 ret += fprintf(fp, "failed to get cpus\n");
3914 break;
3915 default:
3916 ret += fprintf(fp, "... unknown type\n");
3917 break;
3918 }
3919
3920 return ret;
3921}
3922
3923int perf_event__synthesize_attrs(struct perf_tool *tool,
3924 struct perf_evlist *evlist,
3925 perf_event__handler_t process)
3926{
3927 struct perf_evsel *evsel;
3928 int err = 0;
3929
3930 evlist__for_each_entry(evlist, evsel) {
3931 err = perf_event__synthesize_attr(tool, &evsel->attr, evsel->ids,
3932 evsel->id, process);
3933 if (err) {
3934 pr_debug("failed to create perf header attribute\n");
3935 return err;
3936 }
3937 }
3938
3939 return err;
3940}
3941
3942static bool has_unit(struct perf_evsel *counter)
3943{
3944 return counter->unit && *counter->unit;
3945}
3946
3947static bool has_scale(struct perf_evsel *counter)
3948{
3949 return counter->scale != 1;
3950}
3951
3952int perf_event__synthesize_extra_attr(struct perf_tool *tool,
3953 struct perf_evlist *evsel_list,
3954 perf_event__handler_t process,
3955 bool is_pipe)
3956{
3957 struct perf_evsel *counter;
3958 int err;
3959
3960
3961
3962
3963
3964 evlist__for_each_entry(evsel_list, counter) {
3965 if (!counter->supported)
3966 continue;
3967
3968
3969
3970
3971 if (has_unit(counter)) {
3972 err = perf_event__synthesize_event_update_unit(tool, counter, process);
3973 if (err < 0) {
3974 pr_err("Couldn't synthesize evsel unit.\n");
3975 return err;
3976 }
3977 }
3978
3979 if (has_scale(counter)) {
3980 err = perf_event__synthesize_event_update_scale(tool, counter, process);
3981 if (err < 0) {
3982 pr_err("Couldn't synthesize evsel counter.\n");
3983 return err;
3984 }
3985 }
3986
3987 if (counter->own_cpus) {
3988 err = perf_event__synthesize_event_update_cpus(tool, counter, process);
3989 if (err < 0) {
3990 pr_err("Couldn't synthesize evsel cpus.\n");
3991 return err;
3992 }
3993 }
3994
3995
3996
3997
3998
3999 if (is_pipe) {
4000 err = perf_event__synthesize_event_update_name(tool, counter, process);
4001 if (err < 0) {
4002 pr_err("Couldn't synthesize evsel name.\n");
4003 return err;
4004 }
4005 }
4006 }
4007 return 0;
4008}
4009
4010int perf_event__process_attr(struct perf_tool *tool __maybe_unused,
4011 union perf_event *event,
4012 struct perf_evlist **pevlist)
4013{
4014 u32 i, ids, n_ids;
4015 struct perf_evsel *evsel;
4016 struct perf_evlist *evlist = *pevlist;
4017
4018 if (evlist == NULL) {
4019 *pevlist = evlist = perf_evlist__new();
4020 if (evlist == NULL)
4021 return -ENOMEM;
4022 }
4023
4024 evsel = perf_evsel__new(&event->attr.attr);
4025 if (evsel == NULL)
4026 return -ENOMEM;
4027
4028 perf_evlist__add(evlist, evsel);
4029
4030 ids = event->header.size;
4031 ids -= (void *)&event->attr.id - (void *)event;
4032 n_ids = ids / sizeof(u64);
4033
4034
4035
4036
4037
4038 if (perf_evsel__alloc_id(evsel, 1, n_ids))
4039 return -ENOMEM;
4040
4041 for (i = 0; i < n_ids; i++) {
4042 perf_evlist__id_add(evlist, evsel, 0, i, event->attr.id[i]);
4043 }
4044
4045 return 0;
4046}
4047
4048int perf_event__process_event_update(struct perf_tool *tool __maybe_unused,
4049 union perf_event *event,
4050 struct perf_evlist **pevlist)
4051{
4052 struct event_update_event *ev = &event->event_update;
4053 struct event_update_event_scale *ev_scale;
4054 struct event_update_event_cpus *ev_cpus;
4055 struct perf_evlist *evlist;
4056 struct perf_evsel *evsel;
4057 struct cpu_map *map;
4058
4059 if (!pevlist || *pevlist == NULL)
4060 return -EINVAL;
4061
4062 evlist = *pevlist;
4063
4064 evsel = perf_evlist__id2evsel(evlist, ev->id);
4065 if (evsel == NULL)
4066 return -EINVAL;
4067
4068 switch (ev->type) {
4069 case PERF_EVENT_UPDATE__UNIT:
4070 evsel->unit = strdup(ev->data);
4071 break;
4072 case PERF_EVENT_UPDATE__NAME:
4073 evsel->name = strdup(ev->data);
4074 break;
4075 case PERF_EVENT_UPDATE__SCALE:
4076 ev_scale = (struct event_update_event_scale *) ev->data;
4077 evsel->scale = ev_scale->scale;
4078 break;
4079 case PERF_EVENT_UPDATE__CPUS:
4080 ev_cpus = (struct event_update_event_cpus *) ev->data;
4081
4082 map = cpu_map__new_data(&ev_cpus->cpus);
4083 if (map)
4084 evsel->own_cpus = map;
4085 else
4086 pr_err("failed to get event_update cpus\n");
4087 default:
4088 break;
4089 }
4090
4091 return 0;
4092}
4093
4094int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd,
4095 struct perf_evlist *evlist,
4096 perf_event__handler_t process)
4097{
4098 union perf_event ev;
4099 struct tracing_data *tdata;
4100 ssize_t size = 0, aligned_size = 0, padding;
4101 struct feat_fd ff;
4102 int err __maybe_unused = 0;
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115 tdata = tracing_data_get(&evlist->entries, fd, true);
4116 if (!tdata)
4117 return -1;
4118
4119 memset(&ev, 0, sizeof(ev));
4120
4121 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
4122 size = tdata->size;
4123 aligned_size = PERF_ALIGN(size, sizeof(u64));
4124 padding = aligned_size - size;
4125 ev.tracing_data.header.size = sizeof(ev.tracing_data);
4126 ev.tracing_data.size = aligned_size;
4127
4128 process(tool, &ev, NULL, NULL);
4129
4130
4131
4132
4133
4134 tracing_data_put(tdata);
4135
4136 ff = (struct feat_fd){ .fd = fd };
4137 if (write_padded(&ff, NULL, 0, padding))
4138 return -1;
4139
4140 return aligned_size;
4141}
4142
4143int perf_event__process_tracing_data(struct perf_session *session,
4144 union perf_event *event)
4145{
4146 ssize_t size_read, padding, size = event->tracing_data.size;
4147 int fd = perf_data__fd(session->data);
4148 off_t offset = lseek(fd, 0, SEEK_CUR);
4149 char buf[BUFSIZ];
4150
4151
4152 lseek(fd, offset + sizeof(struct tracing_data_event),
4153 SEEK_SET);
4154
4155 size_read = trace_report(fd, &session->tevent,
4156 session->repipe);
4157 padding = PERF_ALIGN(size_read, sizeof(u64)) - size_read;
4158
4159 if (readn(fd, buf, padding) < 0) {
4160 pr_err("%s: reading input file", __func__);
4161 return -1;
4162 }
4163 if (session->repipe) {
4164 int retw = write(STDOUT_FILENO, buf, padding);
4165 if (retw <= 0 || retw != padding) {
4166 pr_err("%s: repiping tracing data padding", __func__);
4167 return -1;
4168 }
4169 }
4170
4171 if (size_read + padding != size) {
4172 pr_err("%s: tracing data size mismatch", __func__);
4173 return -1;
4174 }
4175
4176 perf_evlist__prepare_tracepoint_events(session->evlist,
4177 session->tevent.pevent);
4178
4179 return size_read + padding;
4180}
4181
4182int perf_event__synthesize_build_id(struct perf_tool *tool,
4183 struct dso *pos, u16 misc,
4184 perf_event__handler_t process,
4185 struct machine *machine)
4186{
4187 union perf_event ev;
4188 size_t len;
4189 int err = 0;
4190
4191 if (!pos->hit)
4192 return err;
4193
4194 memset(&ev, 0, sizeof(ev));
4195
4196 len = pos->long_name_len + 1;
4197 len = PERF_ALIGN(len, NAME_ALIGN);
4198 memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
4199 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
4200 ev.build_id.header.misc = misc;
4201 ev.build_id.pid = machine->pid;
4202 ev.build_id.header.size = sizeof(ev.build_id) + len;
4203 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
4204
4205 err = process(tool, &ev, NULL, machine);
4206
4207 return err;
4208}
4209
4210int perf_event__process_build_id(struct perf_session *session,
4211 union perf_event *event)
4212{
4213 __event_process_build_id(&event->build_id,
4214 event->build_id.filename,
4215 session);
4216 return 0;
4217}
4218