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1#include "util.h"
2#include <sys/types.h>
3#include <byteswap.h>
4#include <unistd.h>
5#include <stdio.h>
6#include <stdlib.h>
7#include <linux/list.h>
8#include <linux/kernel.h>
9#include <linux/bitops.h>
10#include <sys/utsname.h>
11
12#include "evlist.h"
13#include "evsel.h"
14#include "header.h"
15#include "../perf.h"
16#include "trace-event.h"
17#include "session.h"
18#include "symbol.h"
19#include "debug.h"
20#include "cpumap.h"
21#include "pmu.h"
22#include "vdso.h"
23#include "strbuf.h"
24#include "build-id.h"
25#include "data.h"
26#include <api/fs/fs.h>
27#include "asm/bug.h"
28
29/*
30 * magic2 = "PERFILE2"
31 * must be a numerical value to let the endianness
32 * determine the memory layout. That way we are able
33 * to detect endianness when reading the perf.data file
34 * back.
35 *
36 * we check for legacy (PERFFILE) format.
37 */
38static const char *__perf_magic1 = "PERFFILE";
39static const u64 __perf_magic2 = 0x32454c4946524550ULL;
40static const u64 __perf_magic2_sw = 0x50455246494c4532ULL;
41
42#define PERF_MAGIC __perf_magic2
43
44struct perf_file_attr {
45 struct perf_event_attr attr;
46 struct perf_file_section ids;
47};
48
49void perf_header__set_feat(struct perf_header *header, int feat)
50{
51 set_bit(feat, header->adds_features);
52}
53
54void perf_header__clear_feat(struct perf_header *header, int feat)
55{
56 clear_bit(feat, header->adds_features);
57}
58
59bool perf_header__has_feat(const struct perf_header *header, int feat)
60{
61 return test_bit(feat, header->adds_features);
62}
63
64static int do_write(int fd, const void *buf, size_t size)
65{
66 while (size) {
67 int ret = write(fd, buf, size);
68
69 if (ret < 0)
70 return -errno;
71
72 size -= ret;
73 buf += ret;
74 }
75
76 return 0;
77}
78
79int write_padded(int fd, const void *bf, size_t count, size_t count_aligned)
80{
81 static const char zero_buf[NAME_ALIGN];
82 int err = do_write(fd, bf, count);
83
84 if (!err)
85 err = do_write(fd, zero_buf, count_aligned - count);
86
87 return err;
88}
89
90#define string_size(str) \
91 (PERF_ALIGN((strlen(str) + 1), NAME_ALIGN) + sizeof(u32))
92
93static int do_write_string(int fd, const char *str)
94{
95 u32 len, olen;
96 int ret;
97
98 olen = strlen(str) + 1;
99 len = PERF_ALIGN(olen, NAME_ALIGN);
100
101 /* write len, incl. \0 */
102 ret = do_write(fd, &len, sizeof(len));
103 if (ret < 0)
104 return ret;
105
106 return write_padded(fd, str, olen, len);
107}
108
109static char *do_read_string(int fd, struct perf_header *ph)
110{
111 ssize_t sz, ret;
112 u32 len;
113 char *buf;
114
115 sz = readn(fd, &len, sizeof(len));
116 if (sz < (ssize_t)sizeof(len))
117 return NULL;
118
119 if (ph->needs_swap)
120 len = bswap_32(len);
121
122 buf = malloc(len);
123 if (!buf)
124 return NULL;
125
126 ret = readn(fd, buf, len);
127 if (ret == (ssize_t)len) {
128 /*
129 * strings are padded by zeroes
130 * thus the actual strlen of buf
131 * may be less than len
132 */
133 return buf;
134 }
135
136 free(buf);
137 return NULL;
138}
139
140static int write_tracing_data(int fd, struct perf_header *h __maybe_unused,
141 struct perf_evlist *evlist)
142{
143 return read_tracing_data(fd, &evlist->entries);
144}
145
146
147static int write_build_id(int fd, struct perf_header *h,
148 struct perf_evlist *evlist __maybe_unused)
149{
150 struct perf_session *session;
151 int err;
152
153 session = container_of(h, struct perf_session, header);
154
155 if (!perf_session__read_build_ids(session, true))
156 return -1;
157
158 err = perf_session__write_buildid_table(session, fd);
159 if (err < 0) {
160 pr_debug("failed to write buildid table\n");
161 return err;
162 }
163 perf_session__cache_build_ids(session);
164
165 return 0;
166}
167
168static int write_hostname(int fd, struct perf_header *h __maybe_unused,
169 struct perf_evlist *evlist __maybe_unused)
170{
171 struct utsname uts;
172 int ret;
173
174 ret = uname(&uts);
175 if (ret < 0)
176 return -1;
177
178 return do_write_string(fd, uts.nodename);
179}
180
181static int write_osrelease(int fd, struct perf_header *h __maybe_unused,
182 struct perf_evlist *evlist __maybe_unused)
183{
184 struct utsname uts;
185 int ret;
186
187 ret = uname(&uts);
188 if (ret < 0)
189 return -1;
190
191 return do_write_string(fd, uts.release);
192}
193
194static int write_arch(int fd, struct perf_header *h __maybe_unused,
195 struct perf_evlist *evlist __maybe_unused)
196{
197 struct utsname uts;
198 int ret;
199
200 ret = uname(&uts);
201 if (ret < 0)
202 return -1;
203
204 return do_write_string(fd, uts.machine);
205}
206
207static int write_version(int fd, struct perf_header *h __maybe_unused,
208 struct perf_evlist *evlist __maybe_unused)
209{
210 return do_write_string(fd, perf_version_string);
211}
212
213static int __write_cpudesc(int fd, const char *cpuinfo_proc)
214{
215 FILE *file;
216 char *buf = NULL;
217 char *s, *p;
218 const char *search = cpuinfo_proc;
219 size_t len = 0;
220 int ret = -1;
221
222 if (!search)
223 return -1;
224
225 file = fopen("/proc/cpuinfo", "r");
226 if (!file)
227 return -1;
228
229 while (getline(&buf, &len, file) > 0) {
230 ret = strncmp(buf, search, strlen(search));
231 if (!ret)
232 break;
233 }
234
235 if (ret) {
236 ret = -1;
237 goto done;
238 }
239
240 s = buf;
241
242 p = strchr(buf, ':');
243 if (p && *(p+1) == ' ' && *(p+2))
244 s = p + 2;
245 p = strchr(s, '\n');
246 if (p)
247 *p = '\0';
248
249 /* squash extra space characters (branding string) */
250 p = s;
251 while (*p) {
252 if (isspace(*p)) {
253 char *r = p + 1;
254 char *q = r;
255 *p = ' ';
256 while (*q && isspace(*q))
257 q++;
258 if (q != (p+1))
259 while ((*r++ = *q++));
260 }
261 p++;
262 }
263 ret = do_write_string(fd, s);
264done:
265 free(buf);
266 fclose(file);
267 return ret;
268}
269
270static int write_cpudesc(int fd, struct perf_header *h __maybe_unused,
271 struct perf_evlist *evlist __maybe_unused)
272{
273#ifndef CPUINFO_PROC
274#define CPUINFO_PROC {"model name", }
275#endif
276 const char *cpuinfo_procs[] = CPUINFO_PROC;
277 unsigned int i;
278
279 for (i = 0; i < ARRAY_SIZE(cpuinfo_procs); i++) {
280 int ret;
281 ret = __write_cpudesc(fd, cpuinfo_procs[i]);
282 if (ret >= 0)
283 return ret;
284 }
285 return -1;
286}
287
288
289static int write_nrcpus(int fd, struct perf_header *h __maybe_unused,
290 struct perf_evlist *evlist __maybe_unused)
291{
292 long nr;
293 u32 nrc, nra;
294 int ret;
295
296 nr = sysconf(_SC_NPROCESSORS_CONF);
297 if (nr < 0)
298 return -1;
299
300 nrc = (u32)(nr & UINT_MAX);
301
302 nr = sysconf(_SC_NPROCESSORS_ONLN);
303 if (nr < 0)
304 return -1;
305
306 nra = (u32)(nr & UINT_MAX);
307
308 ret = do_write(fd, &nrc, sizeof(nrc));
309 if (ret < 0)
310 return ret;
311
312 return do_write(fd, &nra, sizeof(nra));
313}
314
315static int write_event_desc(int fd, struct perf_header *h __maybe_unused,
316 struct perf_evlist *evlist)
317{
318 struct perf_evsel *evsel;
319 u32 nre, nri, sz;
320 int ret;
321
322 nre = evlist->nr_entries;
323
324 /*
325 * write number of events
326 */
327 ret = do_write(fd, &nre, sizeof(nre));
328 if (ret < 0)
329 return ret;
330
331 /*
332 * size of perf_event_attr struct
333 */
334 sz = (u32)sizeof(evsel->attr);
335 ret = do_write(fd, &sz, sizeof(sz));
336 if (ret < 0)
337 return ret;
338
339 evlist__for_each(evlist, evsel) {
340 ret = do_write(fd, &evsel->attr, sz);
341 if (ret < 0)
342 return ret;
343 /*
344 * write number of unique id per event
345 * there is one id per instance of an event
346 *
347 * copy into an nri to be independent of the
348 * type of ids,
349 */
350 nri = evsel->ids;
351 ret = do_write(fd, &nri, sizeof(nri));
352 if (ret < 0)
353 return ret;
354
355 /*
356 * write event string as passed on cmdline
357 */
358 ret = do_write_string(fd, perf_evsel__name(evsel));
359 if (ret < 0)
360 return ret;
361 /*
362 * write unique ids for this event
363 */
364 ret = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
365 if (ret < 0)
366 return ret;
367 }
368 return 0;
369}
370
371static int write_cmdline(int fd, struct perf_header *h __maybe_unused,
372 struct perf_evlist *evlist __maybe_unused)
373{
374 char buf[MAXPATHLEN];
375 char proc[32];
376 u32 n;
377 int i, ret;
378
379 /*
380 * actual atual path to perf binary
381 */
382 sprintf(proc, "/proc/%d/exe", getpid());
383 ret = readlink(proc, buf, sizeof(buf));
384 if (ret <= 0)
385 return -1;
386
387 /* readlink() does not add null termination */
388 buf[ret] = '\0';
389
390 /* account for binary path */
391 n = perf_env.nr_cmdline + 1;
392
393 ret = do_write(fd, &n, sizeof(n));
394 if (ret < 0)
395 return ret;
396
397 ret = do_write_string(fd, buf);
398 if (ret < 0)
399 return ret;
400
401 for (i = 0 ; i < perf_env.nr_cmdline; i++) {
402 ret = do_write_string(fd, perf_env.cmdline_argv[i]);
403 if (ret < 0)
404 return ret;
405 }
406 return 0;
407}
408
409#define CORE_SIB_FMT \
410 "/sys/devices/system/cpu/cpu%d/topology/core_siblings_list"
411#define THRD_SIB_FMT \
412 "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list"
413
414struct cpu_topo {
415 u32 cpu_nr;
416 u32 core_sib;
417 u32 thread_sib;
418 char **core_siblings;
419 char **thread_siblings;
420};
421
422static int build_cpu_topo(struct cpu_topo *tp, int cpu)
423{
424 FILE *fp;
425 char filename[MAXPATHLEN];
426 char *buf = NULL, *p;
427 size_t len = 0;
428 ssize_t sret;
429 u32 i = 0;
430 int ret = -1;
431
432 sprintf(filename, CORE_SIB_FMT, cpu);
433 fp = fopen(filename, "r");
434 if (!fp)
435 goto try_threads;
436
437 sret = getline(&buf, &len, fp);
438 fclose(fp);
439 if (sret <= 0)
440 goto try_threads;
441
442 p = strchr(buf, '\n');
443 if (p)
444 *p = '\0';
445
446 for (i = 0; i < tp->core_sib; i++) {
447 if (!strcmp(buf, tp->core_siblings[i]))
448 break;
449 }
450 if (i == tp->core_sib) {
451 tp->core_siblings[i] = buf;
452 tp->core_sib++;
453 buf = NULL;
454 len = 0;
455 }
456 ret = 0;
457
458try_threads:
459 sprintf(filename, THRD_SIB_FMT, cpu);
460 fp = fopen(filename, "r");
461 if (!fp)
462 goto done;
463
464 if (getline(&buf, &len, fp) <= 0)
465 goto done;
466
467 p = strchr(buf, '\n');
468 if (p)
469 *p = '\0';
470
471 for (i = 0; i < tp->thread_sib; i++) {
472 if (!strcmp(buf, tp->thread_siblings[i]))
473 break;
474 }
475 if (i == tp->thread_sib) {
476 tp->thread_siblings[i] = buf;
477 tp->thread_sib++;
478 buf = NULL;
479 }
480 ret = 0;
481done:
482 if(fp)
483 fclose(fp);
484 free(buf);
485 return ret;
486}
487
488static void free_cpu_topo(struct cpu_topo *tp)
489{
490 u32 i;
491
492 if (!tp)
493 return;
494
495 for (i = 0 ; i < tp->core_sib; i++)
496 zfree(&tp->core_siblings[i]);
497
498 for (i = 0 ; i < tp->thread_sib; i++)
499 zfree(&tp->thread_siblings[i]);
500
501 free(tp);
502}
503
504static struct cpu_topo *build_cpu_topology(void)
505{
506 struct cpu_topo *tp;
507 void *addr;
508 u32 nr, i;
509 size_t sz;
510 long ncpus;
511 int ret = -1;
512
513 ncpus = sysconf(_SC_NPROCESSORS_CONF);
514 if (ncpus < 0)
515 return NULL;
516
517 nr = (u32)(ncpus & UINT_MAX);
518
519 sz = nr * sizeof(char *);
520
521 addr = calloc(1, sizeof(*tp) + 2 * sz);
522 if (!addr)
523 return NULL;
524
525 tp = addr;
526 tp->cpu_nr = nr;
527 addr += sizeof(*tp);
528 tp->core_siblings = addr;
529 addr += sz;
530 tp->thread_siblings = addr;
531
532 for (i = 0; i < nr; i++) {
533 ret = build_cpu_topo(tp, i);
534 if (ret < 0)
535 break;
536 }
537 if (ret) {
538 free_cpu_topo(tp);
539 tp = NULL;
540 }
541 return tp;
542}
543
544static int write_cpu_topology(int fd, struct perf_header *h __maybe_unused,
545 struct perf_evlist *evlist __maybe_unused)
546{
547 struct cpu_topo *tp;
548 u32 i;
549 int ret, j;
550
551 tp = build_cpu_topology();
552 if (!tp)
553 return -1;
554
555 ret = do_write(fd, &tp->core_sib, sizeof(tp->core_sib));
556 if (ret < 0)
557 goto done;
558
559 for (i = 0; i < tp->core_sib; i++) {
560 ret = do_write_string(fd, tp->core_siblings[i]);
561 if (ret < 0)
562 goto done;
563 }
564 ret = do_write(fd, &tp->thread_sib, sizeof(tp->thread_sib));
565 if (ret < 0)
566 goto done;
567
568 for (i = 0; i < tp->thread_sib; i++) {
569 ret = do_write_string(fd, tp->thread_siblings[i]);
570 if (ret < 0)
571 break;
572 }
573
574 ret = perf_env__read_cpu_topology_map(&perf_env);
575 if (ret < 0)
576 goto done;
577
578 for (j = 0; j < perf_env.nr_cpus_avail; j++) {
579 ret = do_write(fd, &perf_env.cpu[j].core_id,
580 sizeof(perf_env.cpu[j].core_id));
581 if (ret < 0)
582 return ret;
583 ret = do_write(fd, &perf_env.cpu[j].socket_id,
584 sizeof(perf_env.cpu[j].socket_id));
585 if (ret < 0)
586 return ret;
587 }
588done:
589 free_cpu_topo(tp);
590 return ret;
591}
592
593
594
595static int write_total_mem(int fd, struct perf_header *h __maybe_unused,
596 struct perf_evlist *evlist __maybe_unused)
597{
598 char *buf = NULL;
599 FILE *fp;
600 size_t len = 0;
601 int ret = -1, n;
602 uint64_t mem;
603
604 fp = fopen("/proc/meminfo", "r");
605 if (!fp)
606 return -1;
607
608 while (getline(&buf, &len, fp) > 0) {
609 ret = strncmp(buf, "MemTotal:", 9);
610 if (!ret)
611 break;
612 }
613 if (!ret) {
614 n = sscanf(buf, "%*s %"PRIu64, &mem);
615 if (n == 1)
616 ret = do_write(fd, &mem, sizeof(mem));
617 } else
618 ret = -1;
619 free(buf);
620 fclose(fp);
621 return ret;
622}
623
624static int write_topo_node(int fd, int node)
625{
626 char str[MAXPATHLEN];
627 char field[32];
628 char *buf = NULL, *p;
629 size_t len = 0;
630 FILE *fp;
631 u64 mem_total, mem_free, mem;
632 int ret = -1;
633
634 sprintf(str, "/sys/devices/system/node/node%d/meminfo", node);
635 fp = fopen(str, "r");
636 if (!fp)
637 return -1;
638
639 while (getline(&buf, &len, fp) > 0) {
640 /* skip over invalid lines */
641 if (!strchr(buf, ':'))
642 continue;
643 if (sscanf(buf, "%*s %*d %31s %"PRIu64, field, &mem) != 2)
644 goto done;
645 if (!strcmp(field, "MemTotal:"))
646 mem_total = mem;
647 if (!strcmp(field, "MemFree:"))
648 mem_free = mem;
649 }
650
651 fclose(fp);
652 fp = NULL;
653
654 ret = do_write(fd, &mem_total, sizeof(u64));
655 if (ret)
656 goto done;
657
658 ret = do_write(fd, &mem_free, sizeof(u64));
659 if (ret)
660 goto done;
661
662 ret = -1;
663 sprintf(str, "/sys/devices/system/node/node%d/cpulist", node);
664
665 fp = fopen(str, "r");
666 if (!fp)
667 goto done;
668
669 if (getline(&buf, &len, fp) <= 0)
670 goto done;
671
672 p = strchr(buf, '\n');
673 if (p)
674 *p = '\0';
675
676 ret = do_write_string(fd, buf);
677done:
678 free(buf);
679 if (fp)
680 fclose(fp);
681 return ret;
682}
683
684static int write_numa_topology(int fd, struct perf_header *h __maybe_unused,
685 struct perf_evlist *evlist __maybe_unused)
686{
687 char *buf = NULL;
688 size_t len = 0;
689 FILE *fp;
690 struct cpu_map *node_map = NULL;
691 char *c;
692 u32 nr, i, j;
693 int ret = -1;
694
695 fp = fopen("/sys/devices/system/node/online", "r");
696 if (!fp)
697 return -1;
698
699 if (getline(&buf, &len, fp) <= 0)
700 goto done;
701
702 c = strchr(buf, '\n');
703 if (c)
704 *c = '\0';
705
706 node_map = cpu_map__new(buf);
707 if (!node_map)
708 goto done;
709
710 nr = (u32)node_map->nr;
711
712 ret = do_write(fd, &nr, sizeof(nr));
713 if (ret < 0)
714 goto done;
715
716 for (i = 0; i < nr; i++) {
717 j = (u32)node_map->map[i];
718 ret = do_write(fd, &j, sizeof(j));
719 if (ret < 0)
720 break;
721
722 ret = write_topo_node(fd, i);
723 if (ret < 0)
724 break;
725 }
726done:
727 free(buf);
728 fclose(fp);
729 cpu_map__put(node_map);
730 return ret;
731}
732
733/*
734 * File format:
735 *
736 * struct pmu_mappings {
737 * u32 pmu_num;
738 * struct pmu_map {
739 * u32 type;
740 * char name[];
741 * }[pmu_num];
742 * };
743 */
744
745static int write_pmu_mappings(int fd, struct perf_header *h __maybe_unused,
746 struct perf_evlist *evlist __maybe_unused)
747{
748 struct perf_pmu *pmu = NULL;
749 off_t offset = lseek(fd, 0, SEEK_CUR);
750 __u32 pmu_num = 0;
751 int ret;
752
753 /* write real pmu_num later */
754 ret = do_write(fd, &pmu_num, sizeof(pmu_num));
755 if (ret < 0)
756 return ret;
757
758 while ((pmu = perf_pmu__scan(pmu))) {
759 if (!pmu->name)
760 continue;
761 pmu_num++;
762
763 ret = do_write(fd, &pmu->type, sizeof(pmu->type));
764 if (ret < 0)
765 return ret;
766
767 ret = do_write_string(fd, pmu->name);
768 if (ret < 0)
769 return ret;
770 }
771
772 if (pwrite(fd, &pmu_num, sizeof(pmu_num), offset) != sizeof(pmu_num)) {
773 /* discard all */
774 lseek(fd, offset, SEEK_SET);
775 return -1;
776 }
777
778 return 0;
779}
780
781/*
782 * File format:
783 *
784 * struct group_descs {
785 * u32 nr_groups;
786 * struct group_desc {
787 * char name[];
788 * u32 leader_idx;
789 * u32 nr_members;
790 * }[nr_groups];
791 * };
792 */
793static int write_group_desc(int fd, struct perf_header *h __maybe_unused,
794 struct perf_evlist *evlist)
795{
796 u32 nr_groups = evlist->nr_groups;
797 struct perf_evsel *evsel;
798 int ret;
799
800 ret = do_write(fd, &nr_groups, sizeof(nr_groups));
801 if (ret < 0)
802 return ret;
803
804 evlist__for_each(evlist, evsel) {
805 if (perf_evsel__is_group_leader(evsel) &&
806 evsel->nr_members > 1) {
807 const char *name = evsel->group_name ?: "{anon_group}";
808 u32 leader_idx = evsel->idx;
809 u32 nr_members = evsel->nr_members;
810
811 ret = do_write_string(fd, name);
812 if (ret < 0)
813 return ret;
814
815 ret = do_write(fd, &leader_idx, sizeof(leader_idx));
816 if (ret < 0)
817 return ret;
818
819 ret = do_write(fd, &nr_members, sizeof(nr_members));
820 if (ret < 0)
821 return ret;
822 }
823 }
824 return 0;
825}
826
827/*
828 * default get_cpuid(): nothing gets recorded
829 * actual implementation must be in arch/$(ARCH)/util/header.c
830 */
831int __attribute__ ((weak)) get_cpuid(char *buffer __maybe_unused,
832 size_t sz __maybe_unused)
833{
834 return -1;
835}
836
837static int write_cpuid(int fd, struct perf_header *h __maybe_unused,
838 struct perf_evlist *evlist __maybe_unused)
839{
840 char buffer[64];
841 int ret;
842
843 ret = get_cpuid(buffer, sizeof(buffer));
844 if (!ret)
845 goto write_it;
846
847 return -1;
848write_it:
849 return do_write_string(fd, buffer);
850}
851
852static int write_branch_stack(int fd __maybe_unused,
853 struct perf_header *h __maybe_unused,
854 struct perf_evlist *evlist __maybe_unused)
855{
856 return 0;
857}
858
859static int write_auxtrace(int fd, struct perf_header *h,
860 struct perf_evlist *evlist __maybe_unused)
861{
862 struct perf_session *session;
863 int err;
864
865 session = container_of(h, struct perf_session, header);
866
867 err = auxtrace_index__write(fd, &session->auxtrace_index);
868 if (err < 0)
869 pr_err("Failed to write auxtrace index\n");
870 return err;
871}
872
873static int cpu_cache_level__sort(const void *a, const void *b)
874{
875 struct cpu_cache_level *cache_a = (struct cpu_cache_level *)a;
876 struct cpu_cache_level *cache_b = (struct cpu_cache_level *)b;
877
878 return cache_a->level - cache_b->level;
879}
880
881static bool cpu_cache_level__cmp(struct cpu_cache_level *a, struct cpu_cache_level *b)
882{
883 if (a->level != b->level)
884 return false;
885
886 if (a->line_size != b->line_size)
887 return false;
888
889 if (a->sets != b->sets)
890 return false;
891
892 if (a->ways != b->ways)
893 return false;
894
895 if (strcmp(a->type, b->type))
896 return false;
897
898 if (strcmp(a->size, b->size))
899 return false;
900
901 if (strcmp(a->map, b->map))
902 return false;
903
904 return true;
905}
906
907static int cpu_cache_level__read(struct cpu_cache_level *cache, u32 cpu, u16 level)
908{
909 char path[PATH_MAX], file[PATH_MAX];
910 struct stat st;
911 size_t len;
912
913 scnprintf(path, PATH_MAX, "devices/system/cpu/cpu%d/cache/index%d/", cpu, level);
914 scnprintf(file, PATH_MAX, "%s/%s", sysfs__mountpoint(), path);
915
916 if (stat(file, &st))
917 return 1;
918
919 scnprintf(file, PATH_MAX, "%s/level", path);
920 if (sysfs__read_int(file, (int *) &cache->level))
921 return -1;
922
923 scnprintf(file, PATH_MAX, "%s/coherency_line_size", path);
924 if (sysfs__read_int(file, (int *) &cache->line_size))
925 return -1;
926
927 scnprintf(file, PATH_MAX, "%s/number_of_sets", path);
928 if (sysfs__read_int(file, (int *) &cache->sets))
929 return -1;
930
931 scnprintf(file, PATH_MAX, "%s/ways_of_associativity", path);
932 if (sysfs__read_int(file, (int *) &cache->ways))
933 return -1;
934
935 scnprintf(file, PATH_MAX, "%s/type", path);
936 if (sysfs__read_str(file, &cache->type, &len))
937 return -1;
938
939 cache->type[len] = 0;
940 cache->type = rtrim(cache->type);
941
942 scnprintf(file, PATH_MAX, "%s/size", path);
943 if (sysfs__read_str(file, &cache->size, &len)) {
944 free(cache->type);
945 return -1;
946 }
947
948 cache->size[len] = 0;
949 cache->size = rtrim(cache->size);
950
951 scnprintf(file, PATH_MAX, "%s/shared_cpu_list", path);
952 if (sysfs__read_str(file, &cache->map, &len)) {
953 free(cache->map);
954 free(cache->type);
955 return -1;
956 }
957
958 cache->map[len] = 0;
959 cache->map = rtrim(cache->map);
960 return 0;
961}
962
963static void cpu_cache_level__fprintf(FILE *out, struct cpu_cache_level *c)
964{
965 fprintf(out, "L%d %-15s %8s [%s]\n", c->level, c->type, c->size, c->map);
966}
967
968static int build_caches(struct cpu_cache_level caches[], u32 size, u32 *cntp)
969{
970 u32 i, cnt = 0;
971 long ncpus;
972 u32 nr, cpu;
973 u16 level;
974
975 ncpus = sysconf(_SC_NPROCESSORS_CONF);
976 if (ncpus < 0)
977 return -1;
978
979 nr = (u32)(ncpus & UINT_MAX);
980
981 for (cpu = 0; cpu < nr; cpu++) {
982 for (level = 0; level < 10; level++) {
983 struct cpu_cache_level c;
984 int err;
985
986 err = cpu_cache_level__read(&c, cpu, level);
987 if (err < 0)
988 return err;
989
990 if (err == 1)
991 break;
992
993 for (i = 0; i < cnt; i++) {
994 if (cpu_cache_level__cmp(&c, &caches[i]))
995 break;
996 }
997
998 if (i == cnt)
999 caches[cnt++] = c;
1000 else
1001 cpu_cache_level__free(&c);
1002
1003 if (WARN_ONCE(cnt == size, "way too many cpu caches.."))
1004 goto out;
1005 }
1006 }
1007 out:
1008 *cntp = cnt;
1009 return 0;
1010}
1011
1012#define MAX_CACHES 2000
1013
1014static int write_cache(int fd, struct perf_header *h __maybe_unused,
1015 struct perf_evlist *evlist __maybe_unused)
1016{
1017 struct cpu_cache_level caches[MAX_CACHES];
1018 u32 cnt = 0, i, version = 1;
1019 int ret;
1020
1021 ret = build_caches(caches, MAX_CACHES, &cnt);
1022 if (ret)
1023 goto out;
1024
1025 qsort(&caches, cnt, sizeof(struct cpu_cache_level), cpu_cache_level__sort);
1026
1027 ret = do_write(fd, &version, sizeof(u32));
1028 if (ret < 0)
1029 goto out;
1030
1031 ret = do_write(fd, &cnt, sizeof(u32));
1032 if (ret < 0)
1033 goto out;
1034
1035 for (i = 0; i < cnt; i++) {
1036 struct cpu_cache_level *c = &caches[i];
1037
1038 #define _W(v) \
1039 ret = do_write(fd, &c->v, sizeof(u32)); \
1040 if (ret < 0) \
1041 goto out;
1042
1043 _W(level)
1044 _W(line_size)
1045 _W(sets)
1046 _W(ways)
1047 #undef _W
1048
1049 #define _W(v) \
1050 ret = do_write_string(fd, (const char *) c->v); \
1051 if (ret < 0) \
1052 goto out;
1053
1054 _W(type)
1055 _W(size)
1056 _W(map)
1057 #undef _W
1058 }
1059
1060out:
1061 for (i = 0; i < cnt; i++)
1062 cpu_cache_level__free(&caches[i]);
1063 return ret;
1064}
1065
1066static int write_stat(int fd __maybe_unused,
1067 struct perf_header *h __maybe_unused,
1068 struct perf_evlist *evlist __maybe_unused)
1069{
1070 return 0;
1071}
1072
1073static void print_hostname(struct perf_header *ph, int fd __maybe_unused,
1074 FILE *fp)
1075{
1076 fprintf(fp, "# hostname : %s\n", ph->env.hostname);
1077}
1078
1079static void print_osrelease(struct perf_header *ph, int fd __maybe_unused,
1080 FILE *fp)
1081{
1082 fprintf(fp, "# os release : %s\n", ph->env.os_release);
1083}
1084
1085static void print_arch(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
1086{
1087 fprintf(fp, "# arch : %s\n", ph->env.arch);
1088}
1089
1090static void print_cpudesc(struct perf_header *ph, int fd __maybe_unused,
1091 FILE *fp)
1092{
1093 fprintf(fp, "# cpudesc : %s\n", ph->env.cpu_desc);
1094}
1095
1096static void print_nrcpus(struct perf_header *ph, int fd __maybe_unused,
1097 FILE *fp)
1098{
1099 fprintf(fp, "# nrcpus online : %u\n", ph->env.nr_cpus_online);
1100 fprintf(fp, "# nrcpus avail : %u\n", ph->env.nr_cpus_avail);
1101}
1102
1103static void print_version(struct perf_header *ph, int fd __maybe_unused,
1104 FILE *fp)
1105{
1106 fprintf(fp, "# perf version : %s\n", ph->env.version);
1107}
1108
1109static void print_cmdline(struct perf_header *ph, int fd __maybe_unused,
1110 FILE *fp)
1111{
1112 int nr, i;
1113
1114 nr = ph->env.nr_cmdline;
1115
1116 fprintf(fp, "# cmdline : ");
1117
1118 for (i = 0; i < nr; i++)
1119 fprintf(fp, "%s ", ph->env.cmdline_argv[i]);
1120 fputc('\n', fp);
1121}
1122
1123static void print_cpu_topology(struct perf_header *ph, int fd __maybe_unused,
1124 FILE *fp)
1125{
1126 int nr, i;
1127 char *str;
1128 int cpu_nr = ph->env.nr_cpus_online;
1129
1130 nr = ph->env.nr_sibling_cores;
1131 str = ph->env.sibling_cores;
1132
1133 for (i = 0; i < nr; i++) {
1134 fprintf(fp, "# sibling cores : %s\n", str);
1135 str += strlen(str) + 1;
1136 }
1137
1138 nr = ph->env.nr_sibling_threads;
1139 str = ph->env.sibling_threads;
1140
1141 for (i = 0; i < nr; i++) {
1142 fprintf(fp, "# sibling threads : %s\n", str);
1143 str += strlen(str) + 1;
1144 }
1145
1146 if (ph->env.cpu != NULL) {
1147 for (i = 0; i < cpu_nr; i++)
1148 fprintf(fp, "# CPU %d: Core ID %d, Socket ID %d\n", i,
1149 ph->env.cpu[i].core_id, ph->env.cpu[i].socket_id);
1150 } else
1151 fprintf(fp, "# Core ID and Socket ID information is not available\n");
1152}
1153
1154static void free_event_desc(struct perf_evsel *events)
1155{
1156 struct perf_evsel *evsel;
1157
1158 if (!events)
1159 return;
1160
1161 for (evsel = events; evsel->attr.size; evsel++) {
1162 zfree(&evsel->name);
1163 zfree(&evsel->id);
1164 }
1165
1166 free(events);
1167}
1168
1169static struct perf_evsel *
1170read_event_desc(struct perf_header *ph, int fd)
1171{
1172 struct perf_evsel *evsel, *events = NULL;
1173 u64 *id;
1174 void *buf = NULL;
1175 u32 nre, sz, nr, i, j;
1176 ssize_t ret;
1177 size_t msz;
1178
1179 /* number of events */
1180 ret = readn(fd, &nre, sizeof(nre));
1181 if (ret != (ssize_t)sizeof(nre))
1182 goto error;
1183
1184 if (ph->needs_swap)
1185 nre = bswap_32(nre);
1186
1187 ret = readn(fd, &sz, sizeof(sz));
1188 if (ret != (ssize_t)sizeof(sz))
1189 goto error;
1190
1191 if (ph->needs_swap)
1192 sz = bswap_32(sz);
1193
1194 /* buffer to hold on file attr struct */
1195 buf = malloc(sz);
1196 if (!buf)
1197 goto error;
1198
1199 /* the last event terminates with evsel->attr.size == 0: */
1200 events = calloc(nre + 1, sizeof(*events));
1201 if (!events)
1202 goto error;
1203
1204 msz = sizeof(evsel->attr);
1205 if (sz < msz)
1206 msz = sz;
1207
1208 for (i = 0, evsel = events; i < nre; evsel++, i++) {
1209 evsel->idx = i;
1210
1211 /*
1212 * must read entire on-file attr struct to
1213 * sync up with layout.
1214 */
1215 ret = readn(fd, buf, sz);
1216 if (ret != (ssize_t)sz)
1217 goto error;
1218
1219 if (ph->needs_swap)
1220 perf_event__attr_swap(buf);
1221
1222 memcpy(&evsel->attr, buf, msz);
1223
1224 ret = readn(fd, &nr, sizeof(nr));
1225 if (ret != (ssize_t)sizeof(nr))
1226 goto error;
1227
1228 if (ph->needs_swap) {
1229 nr = bswap_32(nr);
1230 evsel->needs_swap = true;
1231 }
1232
1233 evsel->name = do_read_string(fd, ph);
1234
1235 if (!nr)
1236 continue;
1237
1238 id = calloc(nr, sizeof(*id));
1239 if (!id)
1240 goto error;
1241 evsel->ids = nr;
1242 evsel->id = id;
1243
1244 for (j = 0 ; j < nr; j++) {
1245 ret = readn(fd, id, sizeof(*id));
1246 if (ret != (ssize_t)sizeof(*id))
1247 goto error;
1248 if (ph->needs_swap)
1249 *id = bswap_64(*id);
1250 id++;
1251 }
1252 }
1253out:
1254 free(buf);
1255 return events;
1256error:
1257 free_event_desc(events);
1258 events = NULL;
1259 goto out;
1260}
1261
1262static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val,
1263 void *priv __attribute__((unused)))
1264{
1265 return fprintf(fp, ", %s = %s", name, val);
1266}
1267
1268static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
1269{
1270 struct perf_evsel *evsel, *events = read_event_desc(ph, fd);
1271 u32 j;
1272 u64 *id;
1273
1274 if (!events) {
1275 fprintf(fp, "# event desc: not available or unable to read\n");
1276 return;
1277 }
1278
1279 for (evsel = events; evsel->attr.size; evsel++) {
1280 fprintf(fp, "# event : name = %s, ", evsel->name);
1281
1282 if (evsel->ids) {
1283 fprintf(fp, ", id = {");
1284 for (j = 0, id = evsel->id; j < evsel->ids; j++, id++) {
1285 if (j)
1286 fputc(',', fp);
1287 fprintf(fp, " %"PRIu64, *id);
1288 }
1289 fprintf(fp, " }");
1290 }
1291
1292 perf_event_attr__fprintf(fp, &evsel->attr, __desc_attr__fprintf, NULL);
1293
1294 fputc('\n', fp);
1295 }
1296
1297 free_event_desc(events);
1298}
1299
1300static void print_total_mem(struct perf_header *ph, int fd __maybe_unused,
1301 FILE *fp)
1302{
1303 fprintf(fp, "# total memory : %Lu kB\n", ph->env.total_mem);
1304}
1305
1306static void print_numa_topology(struct perf_header *ph, int fd __maybe_unused,
1307 FILE *fp)
1308{
1309 u32 nr, c, i;
1310 char *str, *tmp;
1311 uint64_t mem_total, mem_free;
1312
1313 /* nr nodes */
1314 nr = ph->env.nr_numa_nodes;
1315 str = ph->env.numa_nodes;
1316
1317 for (i = 0; i < nr; i++) {
1318 /* node number */
1319 c = strtoul(str, &tmp, 0);
1320 if (*tmp != ':')
1321 goto error;
1322
1323 str = tmp + 1;
1324 mem_total = strtoull(str, &tmp, 0);
1325 if (*tmp != ':')
1326 goto error;
1327
1328 str = tmp + 1;
1329 mem_free = strtoull(str, &tmp, 0);
1330 if (*tmp != ':')
1331 goto error;
1332
1333 fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB,"
1334 " free = %"PRIu64" kB\n",
1335 c, mem_total, mem_free);
1336
1337 str = tmp + 1;
1338 fprintf(fp, "# node%u cpu list : %s\n", c, str);
1339
1340 str += strlen(str) + 1;
1341 }
1342 return;
1343error:
1344 fprintf(fp, "# numa topology : not available\n");
1345}
1346
1347static void print_cpuid(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
1348{
1349 fprintf(fp, "# cpuid : %s\n", ph->env.cpuid);
1350}
1351
1352static void print_branch_stack(struct perf_header *ph __maybe_unused,
1353 int fd __maybe_unused, FILE *fp)
1354{
1355 fprintf(fp, "# contains samples with branch stack\n");
1356}
1357
1358static void print_auxtrace(struct perf_header *ph __maybe_unused,
1359 int fd __maybe_unused, FILE *fp)
1360{
1361 fprintf(fp, "# contains AUX area data (e.g. instruction trace)\n");
1362}
1363
1364static void print_stat(struct perf_header *ph __maybe_unused,
1365 int fd __maybe_unused, FILE *fp)
1366{
1367 fprintf(fp, "# contains stat data\n");
1368}
1369
1370static void print_cache(struct perf_header *ph __maybe_unused,
1371 int fd __maybe_unused, FILE *fp __maybe_unused)
1372{
1373 int i;
1374
1375 fprintf(fp, "# CPU cache info:\n");
1376 for (i = 0; i < ph->env.caches_cnt; i++) {
1377 fprintf(fp, "# ");
1378 cpu_cache_level__fprintf(fp, &ph->env.caches[i]);
1379 }
1380}
1381
1382static void print_pmu_mappings(struct perf_header *ph, int fd __maybe_unused,
1383 FILE *fp)
1384{
1385 const char *delimiter = "# pmu mappings: ";
1386 char *str, *tmp;
1387 u32 pmu_num;
1388 u32 type;
1389
1390 pmu_num = ph->env.nr_pmu_mappings;
1391 if (!pmu_num) {
1392 fprintf(fp, "# pmu mappings: not available\n");
1393 return;
1394 }
1395
1396 str = ph->env.pmu_mappings;
1397
1398 while (pmu_num) {
1399 type = strtoul(str, &tmp, 0);
1400 if (*tmp != ':')
1401 goto error;
1402
1403 str = tmp + 1;
1404 fprintf(fp, "%s%s = %" PRIu32, delimiter, str, type);
1405
1406 delimiter = ", ";
1407 str += strlen(str) + 1;
1408 pmu_num--;
1409 }
1410
1411 fprintf(fp, "\n");
1412
1413 if (!pmu_num)
1414 return;
1415error:
1416 fprintf(fp, "# pmu mappings: unable to read\n");
1417}
1418
1419static void print_group_desc(struct perf_header *ph, int fd __maybe_unused,
1420 FILE *fp)
1421{
1422 struct perf_session *session;
1423 struct perf_evsel *evsel;
1424 u32 nr = 0;
1425
1426 session = container_of(ph, struct perf_session, header);
1427
1428 evlist__for_each(session->evlist, evsel) {
1429 if (perf_evsel__is_group_leader(evsel) &&
1430 evsel->nr_members > 1) {
1431 fprintf(fp, "# group: %s{%s", evsel->group_name ?: "",
1432 perf_evsel__name(evsel));
1433
1434 nr = evsel->nr_members - 1;
1435 } else if (nr) {
1436 fprintf(fp, ",%s", perf_evsel__name(evsel));
1437
1438 if (--nr == 0)
1439 fprintf(fp, "}\n");
1440 }
1441 }
1442}
1443
1444static int __event_process_build_id(struct build_id_event *bev,
1445 char *filename,
1446 struct perf_session *session)
1447{
1448 int err = -1;
1449 struct machine *machine;
1450 u16 cpumode;
1451 struct dso *dso;
1452 enum dso_kernel_type dso_type;
1453
1454 machine = perf_session__findnew_machine(session, bev->pid);
1455 if (!machine)
1456 goto out;
1457
1458 cpumode = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1459
1460 switch (cpumode) {
1461 case PERF_RECORD_MISC_KERNEL:
1462 dso_type = DSO_TYPE_KERNEL;
1463 break;
1464 case PERF_RECORD_MISC_GUEST_KERNEL:
1465 dso_type = DSO_TYPE_GUEST_KERNEL;
1466 break;
1467 case PERF_RECORD_MISC_USER:
1468 case PERF_RECORD_MISC_GUEST_USER:
1469 dso_type = DSO_TYPE_USER;
1470 break;
1471 default:
1472 goto out;
1473 }
1474
1475 dso = machine__findnew_dso(machine, filename);
1476 if (dso != NULL) {
1477 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
1478
1479 dso__set_build_id(dso, &bev->build_id);
1480
1481 if (!is_kernel_module(filename, cpumode))
1482 dso->kernel = dso_type;
1483
1484 build_id__sprintf(dso->build_id, sizeof(dso->build_id),
1485 sbuild_id);
1486 pr_debug("build id event received for %s: %s\n",
1487 dso->long_name, sbuild_id);
1488 dso__put(dso);
1489 }
1490
1491 err = 0;
1492out:
1493 return err;
1494}
1495
1496static int perf_header__read_build_ids_abi_quirk(struct perf_header *header,
1497 int input, u64 offset, u64 size)
1498{
1499 struct perf_session *session = container_of(header, struct perf_session, header);
1500 struct {
1501 struct perf_event_header header;
1502 u8 build_id[PERF_ALIGN(BUILD_ID_SIZE, sizeof(u64))];
1503 char filename[0];
1504 } old_bev;
1505 struct build_id_event bev;
1506 char filename[PATH_MAX];
1507 u64 limit = offset + size;
1508
1509 while (offset < limit) {
1510 ssize_t len;
1511
1512 if (readn(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev))
1513 return -1;
1514
1515 if (header->needs_swap)
1516 perf_event_header__bswap(&old_bev.header);
1517
1518 len = old_bev.header.size - sizeof(old_bev);
1519 if (readn(input, filename, len) != len)
1520 return -1;
1521
1522 bev.header = old_bev.header;
1523
1524 /*
1525 * As the pid is the missing value, we need to fill
1526 * it properly. The header.misc value give us nice hint.
1527 */
1528 bev.pid = HOST_KERNEL_ID;
1529 if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER ||
1530 bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL)
1531 bev.pid = DEFAULT_GUEST_KERNEL_ID;
1532
1533 memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id));
1534 __event_process_build_id(&bev, filename, session);
1535
1536 offset += bev.header.size;
1537 }
1538
1539 return 0;
1540}
1541
1542static int perf_header__read_build_ids(struct perf_header *header,
1543 int input, u64 offset, u64 size)
1544{
1545 struct perf_session *session = container_of(header, struct perf_session, header);
1546 struct build_id_event bev;
1547 char filename[PATH_MAX];
1548 u64 limit = offset + size, orig_offset = offset;
1549 int err = -1;
1550
1551 while (offset < limit) {
1552 ssize_t len;
1553
1554 if (readn(input, &bev, sizeof(bev)) != sizeof(bev))
1555 goto out;
1556
1557 if (header->needs_swap)
1558 perf_event_header__bswap(&bev.header);
1559
1560 len = bev.header.size - sizeof(bev);
1561 if (readn(input, filename, len) != len)
1562 goto out;
1563 /*
1564 * The a1645ce1 changeset:
1565 *
1566 * "perf: 'perf kvm' tool for monitoring guest performance from host"
1567 *
1568 * Added a field to struct build_id_event that broke the file
1569 * format.
1570 *
1571 * Since the kernel build-id is the first entry, process the
1572 * table using the old format if the well known
1573 * '[kernel.kallsyms]' string for the kernel build-id has the
1574 * first 4 characters chopped off (where the pid_t sits).
1575 */
1576 if (memcmp(filename, "nel.kallsyms]", 13) == 0) {
1577 if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1)
1578 return -1;
1579 return perf_header__read_build_ids_abi_quirk(header, input, offset, size);
1580 }
1581
1582 __event_process_build_id(&bev, filename, session);
1583
1584 offset += bev.header.size;
1585 }
1586 err = 0;
1587out:
1588 return err;
1589}
1590
1591static int process_tracing_data(struct perf_file_section *section __maybe_unused,
1592 struct perf_header *ph __maybe_unused,
1593 int fd, void *data)
1594{
1595 ssize_t ret = trace_report(fd, data, false);
1596 return ret < 0 ? -1 : 0;
1597}
1598
1599static int process_build_id(struct perf_file_section *section,
1600 struct perf_header *ph, int fd,
1601 void *data __maybe_unused)
1602{
1603 if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
1604 pr_debug("Failed to read buildids, continuing...\n");
1605 return 0;
1606}
1607
1608static int process_hostname(struct perf_file_section *section __maybe_unused,
1609 struct perf_header *ph, int fd,
1610 void *data __maybe_unused)
1611{
1612 ph->env.hostname = do_read_string(fd, ph);
1613 return ph->env.hostname ? 0 : -ENOMEM;
1614}
1615
1616static int process_osrelease(struct perf_file_section *section __maybe_unused,
1617 struct perf_header *ph, int fd,
1618 void *data __maybe_unused)
1619{
1620 ph->env.os_release = do_read_string(fd, ph);
1621 return ph->env.os_release ? 0 : -ENOMEM;
1622}
1623
1624static int process_version(struct perf_file_section *section __maybe_unused,
1625 struct perf_header *ph, int fd,
1626 void *data __maybe_unused)
1627{
1628 ph->env.version = do_read_string(fd, ph);
1629 return ph->env.version ? 0 : -ENOMEM;
1630}
1631
1632static int process_arch(struct perf_file_section *section __maybe_unused,
1633 struct perf_header *ph, int fd,
1634 void *data __maybe_unused)
1635{
1636 ph->env.arch = do_read_string(fd, ph);
1637 return ph->env.arch ? 0 : -ENOMEM;
1638}
1639
1640static int process_nrcpus(struct perf_file_section *section __maybe_unused,
1641 struct perf_header *ph, int fd,
1642 void *data __maybe_unused)
1643{
1644 ssize_t ret;
1645 u32 nr;
1646
1647 ret = readn(fd, &nr, sizeof(nr));
1648 if (ret != sizeof(nr))
1649 return -1;
1650
1651 if (ph->needs_swap)
1652 nr = bswap_32(nr);
1653
1654 ph->env.nr_cpus_avail = nr;
1655
1656 ret = readn(fd, &nr, sizeof(nr));
1657 if (ret != sizeof(nr))
1658 return -1;
1659
1660 if (ph->needs_swap)
1661 nr = bswap_32(nr);
1662
1663 ph->env.nr_cpus_online = nr;
1664 return 0;
1665}
1666
1667static int process_cpudesc(struct perf_file_section *section __maybe_unused,
1668 struct perf_header *ph, int fd,
1669 void *data __maybe_unused)
1670{
1671 ph->env.cpu_desc = do_read_string(fd, ph);
1672 return ph->env.cpu_desc ? 0 : -ENOMEM;
1673}
1674
1675static int process_cpuid(struct perf_file_section *section __maybe_unused,
1676 struct perf_header *ph, int fd,
1677 void *data __maybe_unused)
1678{
1679 ph->env.cpuid = do_read_string(fd, ph);
1680 return ph->env.cpuid ? 0 : -ENOMEM;
1681}
1682
1683static int process_total_mem(struct perf_file_section *section __maybe_unused,
1684 struct perf_header *ph, int fd,
1685 void *data __maybe_unused)
1686{
1687 uint64_t mem;
1688 ssize_t ret;
1689
1690 ret = readn(fd, &mem, sizeof(mem));
1691 if (ret != sizeof(mem))
1692 return -1;
1693
1694 if (ph->needs_swap)
1695 mem = bswap_64(mem);
1696
1697 ph->env.total_mem = mem;
1698 return 0;
1699}
1700
1701static struct perf_evsel *
1702perf_evlist__find_by_index(struct perf_evlist *evlist, int idx)
1703{
1704 struct perf_evsel *evsel;
1705
1706 evlist__for_each(evlist, evsel) {
1707 if (evsel->idx == idx)
1708 return evsel;
1709 }
1710
1711 return NULL;
1712}
1713
1714static void
1715perf_evlist__set_event_name(struct perf_evlist *evlist,
1716 struct perf_evsel *event)
1717{
1718 struct perf_evsel *evsel;
1719
1720 if (!event->name)
1721 return;
1722
1723 evsel = perf_evlist__find_by_index(evlist, event->idx);
1724 if (!evsel)
1725 return;
1726
1727 if (evsel->name)
1728 return;
1729
1730 evsel->name = strdup(event->name);
1731}
1732
1733static int
1734process_event_desc(struct perf_file_section *section __maybe_unused,
1735 struct perf_header *header, int fd,
1736 void *data __maybe_unused)
1737{
1738 struct perf_session *session;
1739 struct perf_evsel *evsel, *events = read_event_desc(header, fd);
1740
1741 if (!events)
1742 return 0;
1743
1744 session = container_of(header, struct perf_session, header);
1745 for (evsel = events; evsel->attr.size; evsel++)
1746 perf_evlist__set_event_name(session->evlist, evsel);
1747
1748 free_event_desc(events);
1749
1750 return 0;
1751}
1752
1753static int process_cmdline(struct perf_file_section *section,
1754 struct perf_header *ph, int fd,
1755 void *data __maybe_unused)
1756{
1757 ssize_t ret;
1758 char *str, *cmdline = NULL, **argv = NULL;
1759 u32 nr, i, len = 0;
1760
1761 ret = readn(fd, &nr, sizeof(nr));
1762 if (ret != sizeof(nr))
1763 return -1;
1764
1765 if (ph->needs_swap)
1766 nr = bswap_32(nr);
1767
1768 ph->env.nr_cmdline = nr;
1769
1770 cmdline = zalloc(section->size + nr + 1);
1771 if (!cmdline)
1772 return -1;
1773
1774 argv = zalloc(sizeof(char *) * (nr + 1));
1775 if (!argv)
1776 goto error;
1777
1778 for (i = 0; i < nr; i++) {
1779 str = do_read_string(fd, ph);
1780 if (!str)
1781 goto error;
1782
1783 argv[i] = cmdline + len;
1784 memcpy(argv[i], str, strlen(str) + 1);
1785 len += strlen(str) + 1;
1786 free(str);
1787 }
1788 ph->env.cmdline = cmdline;
1789 ph->env.cmdline_argv = (const char **) argv;
1790 return 0;
1791
1792error:
1793 free(argv);
1794 free(cmdline);
1795 return -1;
1796}
1797
1798static int process_cpu_topology(struct perf_file_section *section,
1799 struct perf_header *ph, int fd,
1800 void *data __maybe_unused)
1801{
1802 ssize_t ret;
1803 u32 nr, i;
1804 char *str;
1805 struct strbuf sb;
1806 int cpu_nr = ph->env.nr_cpus_online;
1807 u64 size = 0;
1808
1809 ph->env.cpu = calloc(cpu_nr, sizeof(*ph->env.cpu));
1810 if (!ph->env.cpu)
1811 return -1;
1812
1813 ret = readn(fd, &nr, sizeof(nr));
1814 if (ret != sizeof(nr))
1815 goto free_cpu;
1816
1817 if (ph->needs_swap)
1818 nr = bswap_32(nr);
1819
1820 ph->env.nr_sibling_cores = nr;
1821 size += sizeof(u32);
1822 strbuf_init(&sb, 128);
1823
1824 for (i = 0; i < nr; i++) {
1825 str = do_read_string(fd, ph);
1826 if (!str)
1827 goto error;
1828
1829 /* include a NULL character at the end */
1830 strbuf_add(&sb, str, strlen(str) + 1);
1831 size += string_size(str);
1832 free(str);
1833 }
1834 ph->env.sibling_cores = strbuf_detach(&sb, NULL);
1835
1836 ret = readn(fd, &nr, sizeof(nr));
1837 if (ret != sizeof(nr))
1838 return -1;
1839
1840 if (ph->needs_swap)
1841 nr = bswap_32(nr);
1842
1843 ph->env.nr_sibling_threads = nr;
1844 size += sizeof(u32);
1845
1846 for (i = 0; i < nr; i++) {
1847 str = do_read_string(fd, ph);
1848 if (!str)
1849 goto error;
1850
1851 /* include a NULL character at the end */
1852 strbuf_add(&sb, str, strlen(str) + 1);
1853 size += string_size(str);
1854 free(str);
1855 }
1856 ph->env.sibling_threads = strbuf_detach(&sb, NULL);
1857
1858 /*
1859 * The header may be from old perf,
1860 * which doesn't include core id and socket id information.
1861 */
1862 if (section->size <= size) {
1863 zfree(&ph->env.cpu);
1864 return 0;
1865 }
1866
1867 for (i = 0; i < (u32)cpu_nr; i++) {
1868 ret = readn(fd, &nr, sizeof(nr));
1869 if (ret != sizeof(nr))
1870 goto free_cpu;
1871
1872 if (ph->needs_swap)
1873 nr = bswap_32(nr);
1874
1875 ph->env.cpu[i].core_id = nr;
1876
1877 ret = readn(fd, &nr, sizeof(nr));
1878 if (ret != sizeof(nr))
1879 goto free_cpu;
1880
1881 if (ph->needs_swap)
1882 nr = bswap_32(nr);
1883
1884 if (nr > (u32)cpu_nr) {
1885 pr_debug("socket_id number is too big."
1886 "You may need to upgrade the perf tool.\n");
1887 goto free_cpu;
1888 }
1889
1890 ph->env.cpu[i].socket_id = nr;
1891 }
1892
1893 return 0;
1894
1895error:
1896 strbuf_release(&sb);
1897free_cpu:
1898 zfree(&ph->env.cpu);
1899 return -1;
1900}
1901
1902static int process_numa_topology(struct perf_file_section *section __maybe_unused,
1903 struct perf_header *ph, int fd,
1904 void *data __maybe_unused)
1905{
1906 ssize_t ret;
1907 u32 nr, node, i;
1908 char *str;
1909 uint64_t mem_total, mem_free;
1910 struct strbuf sb;
1911
1912 /* nr nodes */
1913 ret = readn(fd, &nr, sizeof(nr));
1914 if (ret != sizeof(nr))
1915 goto error;
1916
1917 if (ph->needs_swap)
1918 nr = bswap_32(nr);
1919
1920 ph->env.nr_numa_nodes = nr;
1921 strbuf_init(&sb, 256);
1922
1923 for (i = 0; i < nr; i++) {
1924 /* node number */
1925 ret = readn(fd, &node, sizeof(node));
1926 if (ret != sizeof(node))
1927 goto error;
1928
1929 ret = readn(fd, &mem_total, sizeof(u64));
1930 if (ret != sizeof(u64))
1931 goto error;
1932
1933 ret = readn(fd, &mem_free, sizeof(u64));
1934 if (ret != sizeof(u64))
1935 goto error;
1936
1937 if (ph->needs_swap) {
1938 node = bswap_32(node);
1939 mem_total = bswap_64(mem_total);
1940 mem_free = bswap_64(mem_free);
1941 }
1942
1943 strbuf_addf(&sb, "%u:%"PRIu64":%"PRIu64":",
1944 node, mem_total, mem_free);
1945
1946 str = do_read_string(fd, ph);
1947 if (!str)
1948 goto error;
1949
1950 /* include a NULL character at the end */
1951 strbuf_add(&sb, str, strlen(str) + 1);
1952 free(str);
1953 }
1954 ph->env.numa_nodes = strbuf_detach(&sb, NULL);
1955 return 0;
1956
1957error:
1958 strbuf_release(&sb);
1959 return -1;
1960}
1961
1962static int process_pmu_mappings(struct perf_file_section *section __maybe_unused,
1963 struct perf_header *ph, int fd,
1964 void *data __maybe_unused)
1965{
1966 ssize_t ret;
1967 char *name;
1968 u32 pmu_num;
1969 u32 type;
1970 struct strbuf sb;
1971
1972 ret = readn(fd, &pmu_num, sizeof(pmu_num));
1973 if (ret != sizeof(pmu_num))
1974 return -1;
1975
1976 if (ph->needs_swap)
1977 pmu_num = bswap_32(pmu_num);
1978
1979 if (!pmu_num) {
1980 pr_debug("pmu mappings not available\n");
1981 return 0;
1982 }
1983
1984 ph->env.nr_pmu_mappings = pmu_num;
1985 strbuf_init(&sb, 128);
1986
1987 while (pmu_num) {
1988 if (readn(fd, &type, sizeof(type)) != sizeof(type))
1989 goto error;
1990 if (ph->needs_swap)
1991 type = bswap_32(type);
1992
1993 name = do_read_string(fd, ph);
1994 if (!name)
1995 goto error;
1996
1997 strbuf_addf(&sb, "%u:%s", type, name);
1998 /* include a NULL character at the end */
1999 strbuf_add(&sb, "", 1);
2000
2001 if (!strcmp(name, "msr"))
2002 ph->env.msr_pmu_type = type;
2003
2004 free(name);
2005 pmu_num--;
2006 }
2007 ph->env.pmu_mappings = strbuf_detach(&sb, NULL);
2008 return 0;
2009
2010error:
2011 strbuf_release(&sb);
2012 return -1;
2013}
2014
2015static int process_group_desc(struct perf_file_section *section __maybe_unused,
2016 struct perf_header *ph, int fd,
2017 void *data __maybe_unused)
2018{
2019 size_t ret = -1;
2020 u32 i, nr, nr_groups;
2021 struct perf_session *session;
2022 struct perf_evsel *evsel, *leader = NULL;
2023 struct group_desc {
2024 char *name;
2025 u32 leader_idx;
2026 u32 nr_members;
2027 } *desc;
2028
2029 if (readn(fd, &nr_groups, sizeof(nr_groups)) != sizeof(nr_groups))
2030 return -1;
2031
2032 if (ph->needs_swap)
2033 nr_groups = bswap_32(nr_groups);
2034
2035 ph->env.nr_groups = nr_groups;
2036 if (!nr_groups) {
2037 pr_debug("group desc not available\n");
2038 return 0;
2039 }
2040
2041 desc = calloc(nr_groups, sizeof(*desc));
2042 if (!desc)
2043 return -1;
2044
2045 for (i = 0; i < nr_groups; i++) {
2046 desc[i].name = do_read_string(fd, ph);
2047 if (!desc[i].name)
2048 goto out_free;
2049
2050 if (readn(fd, &desc[i].leader_idx, sizeof(u32)) != sizeof(u32))
2051 goto out_free;
2052
2053 if (readn(fd, &desc[i].nr_members, sizeof(u32)) != sizeof(u32))
2054 goto out_free;
2055
2056 if (ph->needs_swap) {
2057 desc[i].leader_idx = bswap_32(desc[i].leader_idx);
2058 desc[i].nr_members = bswap_32(desc[i].nr_members);
2059 }
2060 }
2061
2062 /*
2063 * Rebuild group relationship based on the group_desc
2064 */
2065 session = container_of(ph, struct perf_session, header);
2066 session->evlist->nr_groups = nr_groups;
2067
2068 i = nr = 0;
2069 evlist__for_each(session->evlist, evsel) {
2070 if (evsel->idx == (int) desc[i].leader_idx) {
2071 evsel->leader = evsel;
2072 /* {anon_group} is a dummy name */
2073 if (strcmp(desc[i].name, "{anon_group}")) {
2074 evsel->group_name = desc[i].name;
2075 desc[i].name = NULL;
2076 }
2077 evsel->nr_members = desc[i].nr_members;
2078
2079 if (i >= nr_groups || nr > 0) {
2080 pr_debug("invalid group desc\n");
2081 goto out_free;
2082 }
2083
2084 leader = evsel;
2085 nr = evsel->nr_members - 1;
2086 i++;
2087 } else if (nr) {
2088 /* This is a group member */
2089 evsel->leader = leader;
2090
2091 nr--;
2092 }
2093 }
2094
2095 if (i != nr_groups || nr != 0) {
2096 pr_debug("invalid group desc\n");
2097 goto out_free;
2098 }
2099
2100 ret = 0;
2101out_free:
2102 for (i = 0; i < nr_groups; i++)
2103 zfree(&desc[i].name);
2104 free(desc);
2105
2106 return ret;
2107}
2108
2109static int process_auxtrace(struct perf_file_section *section,
2110 struct perf_header *ph, int fd,
2111 void *data __maybe_unused)
2112{
2113 struct perf_session *session;
2114 int err;
2115
2116 session = container_of(ph, struct perf_session, header);
2117
2118 err = auxtrace_index__process(fd, section->size, session,
2119 ph->needs_swap);
2120 if (err < 0)
2121 pr_err("Failed to process auxtrace index\n");
2122 return err;
2123}
2124
2125static int process_cache(struct perf_file_section *section __maybe_unused,
2126 struct perf_header *ph __maybe_unused, int fd __maybe_unused,
2127 void *data __maybe_unused)
2128{
2129 struct cpu_cache_level *caches;
2130 u32 cnt, i, version;
2131
2132 if (readn(fd, &version, sizeof(version)) != sizeof(version))
2133 return -1;
2134
2135 if (ph->needs_swap)
2136 version = bswap_32(version);
2137
2138 if (version != 1)
2139 return -1;
2140
2141 if (readn(fd, &cnt, sizeof(cnt)) != sizeof(cnt))
2142 return -1;
2143
2144 if (ph->needs_swap)
2145 cnt = bswap_32(cnt);
2146
2147 caches = zalloc(sizeof(*caches) * cnt);
2148 if (!caches)
2149 return -1;
2150
2151 for (i = 0; i < cnt; i++) {
2152 struct cpu_cache_level c;
2153
2154 #define _R(v) \
2155 if (readn(fd, &c.v, sizeof(u32)) != sizeof(u32))\
2156 goto out_free_caches; \
2157 if (ph->needs_swap) \
2158 c.v = bswap_32(c.v); \
2159
2160 _R(level)
2161 _R(line_size)
2162 _R(sets)
2163 _R(ways)
2164 #undef _R
2165
2166 #define _R(v) \
2167 c.v = do_read_string(fd, ph); \
2168 if (!c.v) \
2169 goto out_free_caches;
2170
2171 _R(type)
2172 _R(size)
2173 _R(map)
2174 #undef _R
2175
2176 caches[i] = c;
2177 }
2178
2179 ph->env.caches = caches;
2180 ph->env.caches_cnt = cnt;
2181 return 0;
2182out_free_caches:
2183 free(caches);
2184 return -1;
2185}
2186
2187struct feature_ops {
2188 int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist);
2189 void (*print)(struct perf_header *h, int fd, FILE *fp);
2190 int (*process)(struct perf_file_section *section,
2191 struct perf_header *h, int fd, void *data);
2192 const char *name;
2193 bool full_only;
2194};
2195
2196#define FEAT_OPA(n, func) \
2197 [n] = { .name = #n, .write = write_##func, .print = print_##func }
2198#define FEAT_OPP(n, func) \
2199 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
2200 .process = process_##func }
2201#define FEAT_OPF(n, func) \
2202 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
2203 .process = process_##func, .full_only = true }
2204
2205/* feature_ops not implemented: */
2206#define print_tracing_data NULL
2207#define print_build_id NULL
2208
2209static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
2210 FEAT_OPP(HEADER_TRACING_DATA, tracing_data),
2211 FEAT_OPP(HEADER_BUILD_ID, build_id),
2212 FEAT_OPP(HEADER_HOSTNAME, hostname),
2213 FEAT_OPP(HEADER_OSRELEASE, osrelease),
2214 FEAT_OPP(HEADER_VERSION, version),
2215 FEAT_OPP(HEADER_ARCH, arch),
2216 FEAT_OPP(HEADER_NRCPUS, nrcpus),
2217 FEAT_OPP(HEADER_CPUDESC, cpudesc),
2218 FEAT_OPP(HEADER_CPUID, cpuid),
2219 FEAT_OPP(HEADER_TOTAL_MEM, total_mem),
2220 FEAT_OPP(HEADER_EVENT_DESC, event_desc),
2221 FEAT_OPP(HEADER_CMDLINE, cmdline),
2222 FEAT_OPF(HEADER_CPU_TOPOLOGY, cpu_topology),
2223 FEAT_OPF(HEADER_NUMA_TOPOLOGY, numa_topology),
2224 FEAT_OPA(HEADER_BRANCH_STACK, branch_stack),
2225 FEAT_OPP(HEADER_PMU_MAPPINGS, pmu_mappings),
2226 FEAT_OPP(HEADER_GROUP_DESC, group_desc),
2227 FEAT_OPP(HEADER_AUXTRACE, auxtrace),
2228 FEAT_OPA(HEADER_STAT, stat),
2229 FEAT_OPF(HEADER_CACHE, cache),
2230};
2231
2232struct header_print_data {
2233 FILE *fp;
2234 bool full; /* extended list of headers */
2235};
2236
2237static int perf_file_section__fprintf_info(struct perf_file_section *section,
2238 struct perf_header *ph,
2239 int feat, int fd, void *data)
2240{
2241 struct header_print_data *hd = data;
2242
2243 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
2244 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
2245 "%d, continuing...\n", section->offset, feat);
2246 return 0;
2247 }
2248 if (feat >= HEADER_LAST_FEATURE) {
2249 pr_warning("unknown feature %d\n", feat);
2250 return 0;
2251 }
2252 if (!feat_ops[feat].print)
2253 return 0;
2254
2255 if (!feat_ops[feat].full_only || hd->full)
2256 feat_ops[feat].print(ph, fd, hd->fp);
2257 else
2258 fprintf(hd->fp, "# %s info available, use -I to display\n",
2259 feat_ops[feat].name);
2260
2261 return 0;
2262}
2263
2264int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
2265{
2266 struct header_print_data hd;
2267 struct perf_header *header = &session->header;
2268 int fd = perf_data_file__fd(session->file);
2269 hd.fp = fp;
2270 hd.full = full;
2271
2272 perf_header__process_sections(header, fd, &hd,
2273 perf_file_section__fprintf_info);
2274 return 0;
2275}
2276
2277static int do_write_feat(int fd, struct perf_header *h, int type,
2278 struct perf_file_section **p,
2279 struct perf_evlist *evlist)
2280{
2281 int err;
2282 int ret = 0;
2283
2284 if (perf_header__has_feat(h, type)) {
2285 if (!feat_ops[type].write)
2286 return -1;
2287
2288 (*p)->offset = lseek(fd, 0, SEEK_CUR);
2289
2290 err = feat_ops[type].write(fd, h, evlist);
2291 if (err < 0) {
2292 pr_debug("failed to write feature %d\n", type);
2293
2294 /* undo anything written */
2295 lseek(fd, (*p)->offset, SEEK_SET);
2296
2297 return -1;
2298 }
2299 (*p)->size = lseek(fd, 0, SEEK_CUR) - (*p)->offset;
2300 (*p)++;
2301 }
2302 return ret;
2303}
2304
2305static int perf_header__adds_write(struct perf_header *header,
2306 struct perf_evlist *evlist, int fd)
2307{
2308 int nr_sections;
2309 struct perf_file_section *feat_sec, *p;
2310 int sec_size;
2311 u64 sec_start;
2312 int feat;
2313 int err;
2314
2315 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
2316 if (!nr_sections)
2317 return 0;
2318
2319 feat_sec = p = calloc(nr_sections, sizeof(*feat_sec));
2320 if (feat_sec == NULL)
2321 return -ENOMEM;
2322
2323 sec_size = sizeof(*feat_sec) * nr_sections;
2324
2325 sec_start = header->feat_offset;
2326 lseek(fd, sec_start + sec_size, SEEK_SET);
2327
2328 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
2329 if (do_write_feat(fd, header, feat, &p, evlist))
2330 perf_header__clear_feat(header, feat);
2331 }
2332
2333 lseek(fd, sec_start, SEEK_SET);
2334 /*
2335 * may write more than needed due to dropped feature, but
2336 * this is okay, reader will skip the mising entries
2337 */
2338 err = do_write(fd, feat_sec, sec_size);
2339 if (err < 0)
2340 pr_debug("failed to write feature section\n");
2341 free(feat_sec);
2342 return err;
2343}
2344
2345int perf_header__write_pipe(int fd)
2346{
2347 struct perf_pipe_file_header f_header;
2348 int err;
2349
2350 f_header = (struct perf_pipe_file_header){
2351 .magic = PERF_MAGIC,
2352 .size = sizeof(f_header),
2353 };
2354
2355 err = do_write(fd, &f_header, sizeof(f_header));
2356 if (err < 0) {
2357 pr_debug("failed to write perf pipe header\n");
2358 return err;
2359 }
2360
2361 return 0;
2362}
2363
2364int perf_session__write_header(struct perf_session *session,
2365 struct perf_evlist *evlist,
2366 int fd, bool at_exit)
2367{
2368 struct perf_file_header f_header;
2369 struct perf_file_attr f_attr;
2370 struct perf_header *header = &session->header;
2371 struct perf_evsel *evsel;
2372 u64 attr_offset;
2373 int err;
2374
2375 lseek(fd, sizeof(f_header), SEEK_SET);
2376
2377 evlist__for_each(session->evlist, evsel) {
2378 evsel->id_offset = lseek(fd, 0, SEEK_CUR);
2379 err = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
2380 if (err < 0) {
2381 pr_debug("failed to write perf header\n");
2382 return err;
2383 }
2384 }
2385
2386 attr_offset = lseek(fd, 0, SEEK_CUR);
2387
2388 evlist__for_each(evlist, evsel) {
2389 f_attr = (struct perf_file_attr){
2390 .attr = evsel->attr,
2391 .ids = {
2392 .offset = evsel->id_offset,
2393 .size = evsel->ids * sizeof(u64),
2394 }
2395 };
2396 err = do_write(fd, &f_attr, sizeof(f_attr));
2397 if (err < 0) {
2398 pr_debug("failed to write perf header attribute\n");
2399 return err;
2400 }
2401 }
2402
2403 if (!header->data_offset)
2404 header->data_offset = lseek(fd, 0, SEEK_CUR);
2405 header->feat_offset = header->data_offset + header->data_size;
2406
2407 if (at_exit) {
2408 err = perf_header__adds_write(header, evlist, fd);
2409 if (err < 0)
2410 return err;
2411 }
2412
2413 f_header = (struct perf_file_header){
2414 .magic = PERF_MAGIC,
2415 .size = sizeof(f_header),
2416 .attr_size = sizeof(f_attr),
2417 .attrs = {
2418 .offset = attr_offset,
2419 .size = evlist->nr_entries * sizeof(f_attr),
2420 },
2421 .data = {
2422 .offset = header->data_offset,
2423 .size = header->data_size,
2424 },
2425 /* event_types is ignored, store zeros */
2426 };
2427
2428 memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features));
2429
2430 lseek(fd, 0, SEEK_SET);
2431 err = do_write(fd, &f_header, sizeof(f_header));
2432 if (err < 0) {
2433 pr_debug("failed to write perf header\n");
2434 return err;
2435 }
2436 lseek(fd, header->data_offset + header->data_size, SEEK_SET);
2437
2438 return 0;
2439}
2440
2441static int perf_header__getbuffer64(struct perf_header *header,
2442 int fd, void *buf, size_t size)
2443{
2444 if (readn(fd, buf, size) <= 0)
2445 return -1;
2446
2447 if (header->needs_swap)
2448 mem_bswap_64(buf, size);
2449
2450 return 0;
2451}
2452
2453int perf_header__process_sections(struct perf_header *header, int fd,
2454 void *data,
2455 int (*process)(struct perf_file_section *section,
2456 struct perf_header *ph,
2457 int feat, int fd, void *data))
2458{
2459 struct perf_file_section *feat_sec, *sec;
2460 int nr_sections;
2461 int sec_size;
2462 int feat;
2463 int err;
2464
2465 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
2466 if (!nr_sections)
2467 return 0;
2468
2469 feat_sec = sec = calloc(nr_sections, sizeof(*feat_sec));
2470 if (!feat_sec)
2471 return -1;
2472
2473 sec_size = sizeof(*feat_sec) * nr_sections;
2474
2475 lseek(fd, header->feat_offset, SEEK_SET);
2476
2477 err = perf_header__getbuffer64(header, fd, feat_sec, sec_size);
2478 if (err < 0)
2479 goto out_free;
2480
2481 for_each_set_bit(feat, header->adds_features, HEADER_LAST_FEATURE) {
2482 err = process(sec++, header, feat, fd, data);
2483 if (err < 0)
2484 goto out_free;
2485 }
2486 err = 0;
2487out_free:
2488 free(feat_sec);
2489 return err;
2490}
2491
2492static const int attr_file_abi_sizes[] = {
2493 [0] = PERF_ATTR_SIZE_VER0,
2494 [1] = PERF_ATTR_SIZE_VER1,
2495 [2] = PERF_ATTR_SIZE_VER2,
2496 [3] = PERF_ATTR_SIZE_VER3,
2497 [4] = PERF_ATTR_SIZE_VER4,
2498 0,
2499};
2500
2501/*
2502 * In the legacy file format, the magic number is not used to encode endianness.
2503 * hdr_sz was used to encode endianness. But given that hdr_sz can vary based
2504 * on ABI revisions, we need to try all combinations for all endianness to
2505 * detect the endianness.
2506 */
2507static int try_all_file_abis(uint64_t hdr_sz, struct perf_header *ph)
2508{
2509 uint64_t ref_size, attr_size;
2510 int i;
2511
2512 for (i = 0 ; attr_file_abi_sizes[i]; i++) {
2513 ref_size = attr_file_abi_sizes[i]
2514 + sizeof(struct perf_file_section);
2515 if (hdr_sz != ref_size) {
2516 attr_size = bswap_64(hdr_sz);
2517 if (attr_size != ref_size)
2518 continue;
2519
2520 ph->needs_swap = true;
2521 }
2522 pr_debug("ABI%d perf.data file detected, need_swap=%d\n",
2523 i,
2524 ph->needs_swap);
2525 return 0;
2526 }
2527 /* could not determine endianness */
2528 return -1;
2529}
2530
2531#define PERF_PIPE_HDR_VER0 16
2532
2533static const size_t attr_pipe_abi_sizes[] = {
2534 [0] = PERF_PIPE_HDR_VER0,
2535 0,
2536};
2537
2538/*
2539 * In the legacy pipe format, there is an implicit assumption that endiannesss
2540 * between host recording the samples, and host parsing the samples is the
2541 * same. This is not always the case given that the pipe output may always be
2542 * redirected into a file and analyzed on a different machine with possibly a
2543 * different endianness and perf_event ABI revsions in the perf tool itself.
2544 */
2545static int try_all_pipe_abis(uint64_t hdr_sz, struct perf_header *ph)
2546{
2547 u64 attr_size;
2548 int i;
2549
2550 for (i = 0 ; attr_pipe_abi_sizes[i]; i++) {
2551 if (hdr_sz != attr_pipe_abi_sizes[i]) {
2552 attr_size = bswap_64(hdr_sz);
2553 if (attr_size != hdr_sz)
2554 continue;
2555
2556 ph->needs_swap = true;
2557 }
2558 pr_debug("Pipe ABI%d perf.data file detected\n", i);
2559 return 0;
2560 }
2561 return -1;
2562}
2563
2564bool is_perf_magic(u64 magic)
2565{
2566 if (!memcmp(&magic, __perf_magic1, sizeof(magic))
2567 || magic == __perf_magic2
2568 || magic == __perf_magic2_sw)
2569 return true;
2570
2571 return false;
2572}
2573
2574static int check_magic_endian(u64 magic, uint64_t hdr_sz,
2575 bool is_pipe, struct perf_header *ph)
2576{
2577 int ret;
2578
2579 /* check for legacy format */
2580 ret = memcmp(&magic, __perf_magic1, sizeof(magic));
2581 if (ret == 0) {
2582 ph->version = PERF_HEADER_VERSION_1;
2583 pr_debug("legacy perf.data format\n");
2584 if (is_pipe)
2585 return try_all_pipe_abis(hdr_sz, ph);
2586
2587 return try_all_file_abis(hdr_sz, ph);
2588 }
2589 /*
2590 * the new magic number serves two purposes:
2591 * - unique number to identify actual perf.data files
2592 * - encode endianness of file
2593 */
2594 ph->version = PERF_HEADER_VERSION_2;
2595
2596 /* check magic number with one endianness */
2597 if (magic == __perf_magic2)
2598 return 0;
2599
2600 /* check magic number with opposite endianness */
2601 if (magic != __perf_magic2_sw)
2602 return -1;
2603
2604 ph->needs_swap = true;
2605
2606 return 0;
2607}
2608
2609int perf_file_header__read(struct perf_file_header *header,
2610 struct perf_header *ph, int fd)
2611{
2612 ssize_t ret;
2613
2614 lseek(fd, 0, SEEK_SET);
2615
2616 ret = readn(fd, header, sizeof(*header));
2617 if (ret <= 0)
2618 return -1;
2619
2620 if (check_magic_endian(header->magic,
2621 header->attr_size, false, ph) < 0) {
2622 pr_debug("magic/endian check failed\n");
2623 return -1;
2624 }
2625
2626 if (ph->needs_swap) {
2627 mem_bswap_64(header, offsetof(struct perf_file_header,
2628 adds_features));
2629 }
2630
2631 if (header->size != sizeof(*header)) {
2632 /* Support the previous format */
2633 if (header->size == offsetof(typeof(*header), adds_features))
2634 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
2635 else
2636 return -1;
2637 } else if (ph->needs_swap) {
2638 /*
2639 * feature bitmap is declared as an array of unsigned longs --
2640 * not good since its size can differ between the host that
2641 * generated the data file and the host analyzing the file.
2642 *
2643 * We need to handle endianness, but we don't know the size of
2644 * the unsigned long where the file was generated. Take a best
2645 * guess at determining it: try 64-bit swap first (ie., file
2646 * created on a 64-bit host), and check if the hostname feature
2647 * bit is set (this feature bit is forced on as of fbe96f2).
2648 * If the bit is not, undo the 64-bit swap and try a 32-bit
2649 * swap. If the hostname bit is still not set (e.g., older data
2650 * file), punt and fallback to the original behavior --
2651 * clearing all feature bits and setting buildid.
2652 */
2653 mem_bswap_64(&header->adds_features,
2654 BITS_TO_U64(HEADER_FEAT_BITS));
2655
2656 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
2657 /* unswap as u64 */
2658 mem_bswap_64(&header->adds_features,
2659 BITS_TO_U64(HEADER_FEAT_BITS));
2660
2661 /* unswap as u32 */
2662 mem_bswap_32(&header->adds_features,
2663 BITS_TO_U32(HEADER_FEAT_BITS));
2664 }
2665
2666 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
2667 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
2668 set_bit(HEADER_BUILD_ID, header->adds_features);
2669 }
2670 }
2671
2672 memcpy(&ph->adds_features, &header->adds_features,
2673 sizeof(ph->adds_features));
2674
2675 ph->data_offset = header->data.offset;
2676 ph->data_size = header->data.size;
2677 ph->feat_offset = header->data.offset + header->data.size;
2678 return 0;
2679}
2680
2681static int perf_file_section__process(struct perf_file_section *section,
2682 struct perf_header *ph,
2683 int feat, int fd, void *data)
2684{
2685 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
2686 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
2687 "%d, continuing...\n", section->offset, feat);
2688 return 0;
2689 }
2690
2691 if (feat >= HEADER_LAST_FEATURE) {
2692 pr_debug("unknown feature %d, continuing...\n", feat);
2693 return 0;
2694 }
2695
2696 if (!feat_ops[feat].process)
2697 return 0;
2698
2699 return feat_ops[feat].process(section, ph, fd, data);
2700}
2701
2702static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
2703 struct perf_header *ph, int fd,
2704 bool repipe)
2705{
2706 ssize_t ret;
2707
2708 ret = readn(fd, header, sizeof(*header));
2709 if (ret <= 0)
2710 return -1;
2711
2712 if (check_magic_endian(header->magic, header->size, true, ph) < 0) {
2713 pr_debug("endian/magic failed\n");
2714 return -1;
2715 }
2716
2717 if (ph->needs_swap)
2718 header->size = bswap_64(header->size);
2719
2720 if (repipe && do_write(STDOUT_FILENO, header, sizeof(*header)) < 0)
2721 return -1;
2722
2723 return 0;
2724}
2725
2726static int perf_header__read_pipe(struct perf_session *session)
2727{
2728 struct perf_header *header = &session->header;
2729 struct perf_pipe_file_header f_header;
2730
2731 if (perf_file_header__read_pipe(&f_header, header,
2732 perf_data_file__fd(session->file),
2733 session->repipe) < 0) {
2734 pr_debug("incompatible file format\n");
2735 return -EINVAL;
2736 }
2737
2738 return 0;
2739}
2740
2741static int read_attr(int fd, struct perf_header *ph,
2742 struct perf_file_attr *f_attr)
2743{
2744 struct perf_event_attr *attr = &f_attr->attr;
2745 size_t sz, left;
2746 size_t our_sz = sizeof(f_attr->attr);
2747 ssize_t ret;
2748
2749 memset(f_attr, 0, sizeof(*f_attr));
2750
2751 /* read minimal guaranteed structure */
2752 ret = readn(fd, attr, PERF_ATTR_SIZE_VER0);
2753 if (ret <= 0) {
2754 pr_debug("cannot read %d bytes of header attr\n",
2755 PERF_ATTR_SIZE_VER0);
2756 return -1;
2757 }
2758
2759 /* on file perf_event_attr size */
2760 sz = attr->size;
2761
2762 if (ph->needs_swap)
2763 sz = bswap_32(sz);
2764
2765 if (sz == 0) {
2766 /* assume ABI0 */
2767 sz = PERF_ATTR_SIZE_VER0;
2768 } else if (sz > our_sz) {
2769 pr_debug("file uses a more recent and unsupported ABI"
2770 " (%zu bytes extra)\n", sz - our_sz);
2771 return -1;
2772 }
2773 /* what we have not yet read and that we know about */
2774 left = sz - PERF_ATTR_SIZE_VER0;
2775 if (left) {
2776 void *ptr = attr;
2777 ptr += PERF_ATTR_SIZE_VER0;
2778
2779 ret = readn(fd, ptr, left);
2780 }
2781 /* read perf_file_section, ids are read in caller */
2782 ret = readn(fd, &f_attr->ids, sizeof(f_attr->ids));
2783
2784 return ret <= 0 ? -1 : 0;
2785}
2786
2787static int perf_evsel__prepare_tracepoint_event(struct perf_evsel *evsel,
2788 struct pevent *pevent)
2789{
2790 struct event_format *event;
2791 char bf[128];
2792
2793 /* already prepared */
2794 if (evsel->tp_format)
2795 return 0;
2796
2797 if (pevent == NULL) {
2798 pr_debug("broken or missing trace data\n");
2799 return -1;
2800 }
2801
2802 event = pevent_find_event(pevent, evsel->attr.config);
2803 if (event == NULL)
2804 return -1;
2805
2806 if (!evsel->name) {
2807 snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name);
2808 evsel->name = strdup(bf);
2809 if (evsel->name == NULL)
2810 return -1;
2811 }
2812
2813 evsel->tp_format = event;
2814 return 0;
2815}
2816
2817static int perf_evlist__prepare_tracepoint_events(struct perf_evlist *evlist,
2818 struct pevent *pevent)
2819{
2820 struct perf_evsel *pos;
2821
2822 evlist__for_each(evlist, pos) {
2823 if (pos->attr.type == PERF_TYPE_TRACEPOINT &&
2824 perf_evsel__prepare_tracepoint_event(pos, pevent))
2825 return -1;
2826 }
2827
2828 return 0;
2829}
2830
2831int perf_session__read_header(struct perf_session *session)
2832{
2833 struct perf_data_file *file = session->file;
2834 struct perf_header *header = &session->header;
2835 struct perf_file_header f_header;
2836 struct perf_file_attr f_attr;
2837 u64 f_id;
2838 int nr_attrs, nr_ids, i, j;
2839 int fd = perf_data_file__fd(file);
2840
2841 session->evlist = perf_evlist__new();
2842 if (session->evlist == NULL)
2843 return -ENOMEM;
2844
2845 session->evlist->env = &header->env;
2846 session->machines.host.env = &header->env;
2847 if (perf_data_file__is_pipe(file))
2848 return perf_header__read_pipe(session);
2849
2850 if (perf_file_header__read(&f_header, header, fd) < 0)
2851 return -EINVAL;
2852
2853 /*
2854 * Sanity check that perf.data was written cleanly; data size is
2855 * initialized to 0 and updated only if the on_exit function is run.
2856 * If data size is still 0 then the file contains only partial
2857 * information. Just warn user and process it as much as it can.
2858 */
2859 if (f_header.data.size == 0) {
2860 pr_warning("WARNING: The %s file's data size field is 0 which is unexpected.\n"
2861 "Was the 'perf record' command properly terminated?\n",
2862 file->path);
2863 }
2864
2865 nr_attrs = f_header.attrs.size / f_header.attr_size;
2866 lseek(fd, f_header.attrs.offset, SEEK_SET);
2867
2868 for (i = 0; i < nr_attrs; i++) {
2869 struct perf_evsel *evsel;
2870 off_t tmp;
2871
2872 if (read_attr(fd, header, &f_attr) < 0)
2873 goto out_errno;
2874
2875 if (header->needs_swap) {
2876 f_attr.ids.size = bswap_64(f_attr.ids.size);
2877 f_attr.ids.offset = bswap_64(f_attr.ids.offset);
2878 perf_event__attr_swap(&f_attr.attr);
2879 }
2880
2881 tmp = lseek(fd, 0, SEEK_CUR);
2882 evsel = perf_evsel__new(&f_attr.attr);
2883
2884 if (evsel == NULL)
2885 goto out_delete_evlist;
2886
2887 evsel->needs_swap = header->needs_swap;
2888 /*
2889 * Do it before so that if perf_evsel__alloc_id fails, this
2890 * entry gets purged too at perf_evlist__delete().
2891 */
2892 perf_evlist__add(session->evlist, evsel);
2893
2894 nr_ids = f_attr.ids.size / sizeof(u64);
2895 /*
2896 * We don't have the cpu and thread maps on the header, so
2897 * for allocating the perf_sample_id table we fake 1 cpu and
2898 * hattr->ids threads.
2899 */
2900 if (perf_evsel__alloc_id(evsel, 1, nr_ids))
2901 goto out_delete_evlist;
2902
2903 lseek(fd, f_attr.ids.offset, SEEK_SET);
2904
2905 for (j = 0; j < nr_ids; j++) {
2906 if (perf_header__getbuffer64(header, fd, &f_id, sizeof(f_id)))
2907 goto out_errno;
2908
2909 perf_evlist__id_add(session->evlist, evsel, 0, j, f_id);
2910 }
2911
2912 lseek(fd, tmp, SEEK_SET);
2913 }
2914
2915 symbol_conf.nr_events = nr_attrs;
2916
2917 perf_header__process_sections(header, fd, &session->tevent,
2918 perf_file_section__process);
2919
2920 if (perf_evlist__prepare_tracepoint_events(session->evlist,
2921 session->tevent.pevent))
2922 goto out_delete_evlist;
2923
2924 return 0;
2925out_errno:
2926 return -errno;
2927
2928out_delete_evlist:
2929 perf_evlist__delete(session->evlist);
2930 session->evlist = NULL;
2931 return -ENOMEM;
2932}
2933
2934int perf_event__synthesize_attr(struct perf_tool *tool,
2935 struct perf_event_attr *attr, u32 ids, u64 *id,
2936 perf_event__handler_t process)
2937{
2938 union perf_event *ev;
2939 size_t size;
2940 int err;
2941
2942 size = sizeof(struct perf_event_attr);
2943 size = PERF_ALIGN(size, sizeof(u64));
2944 size += sizeof(struct perf_event_header);
2945 size += ids * sizeof(u64);
2946
2947 ev = malloc(size);
2948
2949 if (ev == NULL)
2950 return -ENOMEM;
2951
2952 ev->attr.attr = *attr;
2953 memcpy(ev->attr.id, id, ids * sizeof(u64));
2954
2955 ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
2956 ev->attr.header.size = (u16)size;
2957
2958 if (ev->attr.header.size == size)
2959 err = process(tool, ev, NULL, NULL);
2960 else
2961 err = -E2BIG;
2962
2963 free(ev);
2964
2965 return err;
2966}
2967
2968static struct event_update_event *
2969event_update_event__new(size_t size, u64 type, u64 id)
2970{
2971 struct event_update_event *ev;
2972
2973 size += sizeof(*ev);
2974 size = PERF_ALIGN(size, sizeof(u64));
2975
2976 ev = zalloc(size);
2977 if (ev) {
2978 ev->header.type = PERF_RECORD_EVENT_UPDATE;
2979 ev->header.size = (u16)size;
2980 ev->type = type;
2981 ev->id = id;
2982 }
2983 return ev;
2984}
2985
2986int
2987perf_event__synthesize_event_update_unit(struct perf_tool *tool,
2988 struct perf_evsel *evsel,
2989 perf_event__handler_t process)
2990{
2991 struct event_update_event *ev;
2992 size_t size = strlen(evsel->unit);
2993 int err;
2994
2995 ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->id[0]);
2996 if (ev == NULL)
2997 return -ENOMEM;
2998
2999 strncpy(ev->data, evsel->unit, size);
3000 err = process(tool, (union perf_event *)ev, NULL, NULL);
3001 free(ev);
3002 return err;
3003}
3004
3005int
3006perf_event__synthesize_event_update_scale(struct perf_tool *tool,
3007 struct perf_evsel *evsel,
3008 perf_event__handler_t process)
3009{
3010 struct event_update_event *ev;
3011 struct event_update_event_scale *ev_data;
3012 int err;
3013
3014 ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->id[0]);
3015 if (ev == NULL)
3016 return -ENOMEM;
3017
3018 ev_data = (struct event_update_event_scale *) ev->data;
3019 ev_data->scale = evsel->scale;
3020 err = process(tool, (union perf_event*) ev, NULL, NULL);
3021 free(ev);
3022 return err;
3023}
3024
3025int
3026perf_event__synthesize_event_update_name(struct perf_tool *tool,
3027 struct perf_evsel *evsel,
3028 perf_event__handler_t process)
3029{
3030 struct event_update_event *ev;
3031 size_t len = strlen(evsel->name);
3032 int err;
3033
3034 ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->id[0]);
3035 if (ev == NULL)
3036 return -ENOMEM;
3037
3038 strncpy(ev->data, evsel->name, len);
3039 err = process(tool, (union perf_event*) ev, NULL, NULL);
3040 free(ev);
3041 return err;
3042}
3043
3044int
3045perf_event__synthesize_event_update_cpus(struct perf_tool *tool,
3046 struct perf_evsel *evsel,
3047 perf_event__handler_t process)
3048{
3049 size_t size = sizeof(struct event_update_event);
3050 struct event_update_event *ev;
3051 int max, err;
3052 u16 type;
3053
3054 if (!evsel->own_cpus)
3055 return 0;
3056
3057 ev = cpu_map_data__alloc(evsel->own_cpus, &size, &type, &max);
3058 if (!ev)
3059 return -ENOMEM;
3060
3061 ev->header.type = PERF_RECORD_EVENT_UPDATE;
3062 ev->header.size = (u16)size;
3063 ev->type = PERF_EVENT_UPDATE__CPUS;
3064 ev->id = evsel->id[0];
3065
3066 cpu_map_data__synthesize((struct cpu_map_data *) ev->data,
3067 evsel->own_cpus,
3068 type, max);
3069
3070 err = process(tool, (union perf_event*) ev, NULL, NULL);
3071 free(ev);
3072 return err;
3073}
3074
3075size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp)
3076{
3077 struct event_update_event *ev = &event->event_update;
3078 struct event_update_event_scale *ev_scale;
3079 struct event_update_event_cpus *ev_cpus;
3080 struct cpu_map *map;
3081 size_t ret;
3082
3083 ret = fprintf(fp, "\n... id: %" PRIu64 "\n", ev->id);
3084
3085 switch (ev->type) {
3086 case PERF_EVENT_UPDATE__SCALE:
3087 ev_scale = (struct event_update_event_scale *) ev->data;
3088 ret += fprintf(fp, "... scale: %f\n", ev_scale->scale);
3089 break;
3090 case PERF_EVENT_UPDATE__UNIT:
3091 ret += fprintf(fp, "... unit: %s\n", ev->data);
3092 break;
3093 case PERF_EVENT_UPDATE__NAME:
3094 ret += fprintf(fp, "... name: %s\n", ev->data);
3095 break;
3096 case PERF_EVENT_UPDATE__CPUS:
3097 ev_cpus = (struct event_update_event_cpus *) ev->data;
3098 ret += fprintf(fp, "... ");
3099
3100 map = cpu_map__new_data(&ev_cpus->cpus);
3101 if (map)
3102 ret += cpu_map__fprintf(map, fp);
3103 else
3104 ret += fprintf(fp, "failed to get cpus\n");
3105 break;
3106 default:
3107 ret += fprintf(fp, "... unknown type\n");
3108 break;
3109 }
3110
3111 return ret;
3112}
3113
3114int perf_event__synthesize_attrs(struct perf_tool *tool,
3115 struct perf_session *session,
3116 perf_event__handler_t process)
3117{
3118 struct perf_evsel *evsel;
3119 int err = 0;
3120
3121 evlist__for_each(session->evlist, evsel) {
3122 err = perf_event__synthesize_attr(tool, &evsel->attr, evsel->ids,
3123 evsel->id, process);
3124 if (err) {
3125 pr_debug("failed to create perf header attribute\n");
3126 return err;
3127 }
3128 }
3129
3130 return err;
3131}
3132
3133int perf_event__process_attr(struct perf_tool *tool __maybe_unused,
3134 union perf_event *event,
3135 struct perf_evlist **pevlist)
3136{
3137 u32 i, ids, n_ids;
3138 struct perf_evsel *evsel;
3139 struct perf_evlist *evlist = *pevlist;
3140
3141 if (evlist == NULL) {
3142 *pevlist = evlist = perf_evlist__new();
3143 if (evlist == NULL)
3144 return -ENOMEM;
3145 }
3146
3147 evsel = perf_evsel__new(&event->attr.attr);
3148 if (evsel == NULL)
3149 return -ENOMEM;
3150
3151 perf_evlist__add(evlist, evsel);
3152
3153 ids = event->header.size;
3154 ids -= (void *)&event->attr.id - (void *)event;
3155 n_ids = ids / sizeof(u64);
3156 /*
3157 * We don't have the cpu and thread maps on the header, so
3158 * for allocating the perf_sample_id table we fake 1 cpu and
3159 * hattr->ids threads.
3160 */
3161 if (perf_evsel__alloc_id(evsel, 1, n_ids))
3162 return -ENOMEM;
3163
3164 for (i = 0; i < n_ids; i++) {
3165 perf_evlist__id_add(evlist, evsel, 0, i, event->attr.id[i]);
3166 }
3167
3168 symbol_conf.nr_events = evlist->nr_entries;
3169
3170 return 0;
3171}
3172
3173int perf_event__process_event_update(struct perf_tool *tool __maybe_unused,
3174 union perf_event *event,
3175 struct perf_evlist **pevlist)
3176{
3177 struct event_update_event *ev = &event->event_update;
3178 struct event_update_event_scale *ev_scale;
3179 struct event_update_event_cpus *ev_cpus;
3180 struct perf_evlist *evlist;
3181 struct perf_evsel *evsel;
3182 struct cpu_map *map;
3183
3184 if (!pevlist || *pevlist == NULL)
3185 return -EINVAL;
3186
3187 evlist = *pevlist;
3188
3189 evsel = perf_evlist__id2evsel(evlist, ev->id);
3190 if (evsel == NULL)
3191 return -EINVAL;
3192
3193 switch (ev->type) {
3194 case PERF_EVENT_UPDATE__UNIT:
3195 evsel->unit = strdup(ev->data);
3196 break;
3197 case PERF_EVENT_UPDATE__NAME:
3198 evsel->name = strdup(ev->data);
3199 break;
3200 case PERF_EVENT_UPDATE__SCALE:
3201 ev_scale = (struct event_update_event_scale *) ev->data;
3202 evsel->scale = ev_scale->scale;
3203 case PERF_EVENT_UPDATE__CPUS:
3204 ev_cpus = (struct event_update_event_cpus *) ev->data;
3205
3206 map = cpu_map__new_data(&ev_cpus->cpus);
3207 if (map)
3208 evsel->own_cpus = map;
3209 else
3210 pr_err("failed to get event_update cpus\n");
3211 default:
3212 break;
3213 }
3214
3215 return 0;
3216}
3217
3218int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd,
3219 struct perf_evlist *evlist,
3220 perf_event__handler_t process)
3221{
3222 union perf_event ev;
3223 struct tracing_data *tdata;
3224 ssize_t size = 0, aligned_size = 0, padding;
3225 int err __maybe_unused = 0;
3226
3227 /*
3228 * We are going to store the size of the data followed
3229 * by the data contents. Since the fd descriptor is a pipe,
3230 * we cannot seek back to store the size of the data once
3231 * we know it. Instead we:
3232 *
3233 * - write the tracing data to the temp file
3234 * - get/write the data size to pipe
3235 * - write the tracing data from the temp file
3236 * to the pipe
3237 */
3238 tdata = tracing_data_get(&evlist->entries, fd, true);
3239 if (!tdata)
3240 return -1;
3241
3242 memset(&ev, 0, sizeof(ev));
3243
3244 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
3245 size = tdata->size;
3246 aligned_size = PERF_ALIGN(size, sizeof(u64));
3247 padding = aligned_size - size;
3248 ev.tracing_data.header.size = sizeof(ev.tracing_data);
3249 ev.tracing_data.size = aligned_size;
3250
3251 process(tool, &ev, NULL, NULL);
3252
3253 /*
3254 * The put function will copy all the tracing data
3255 * stored in temp file to the pipe.
3256 */
3257 tracing_data_put(tdata);
3258
3259 write_padded(fd, NULL, 0, padding);
3260
3261 return aligned_size;
3262}
3263
3264int perf_event__process_tracing_data(struct perf_tool *tool __maybe_unused,
3265 union perf_event *event,
3266 struct perf_session *session)
3267{
3268 ssize_t size_read, padding, size = event->tracing_data.size;
3269 int fd = perf_data_file__fd(session->file);
3270 off_t offset = lseek(fd, 0, SEEK_CUR);
3271 char buf[BUFSIZ];
3272
3273 /* setup for reading amidst mmap */
3274 lseek(fd, offset + sizeof(struct tracing_data_event),
3275 SEEK_SET);
3276
3277 size_read = trace_report(fd, &session->tevent,
3278 session->repipe);
3279 padding = PERF_ALIGN(size_read, sizeof(u64)) - size_read;
3280
3281 if (readn(fd, buf, padding) < 0) {
3282 pr_err("%s: reading input file", __func__);
3283 return -1;
3284 }
3285 if (session->repipe) {
3286 int retw = write(STDOUT_FILENO, buf, padding);
3287 if (retw <= 0 || retw != padding) {
3288 pr_err("%s: repiping tracing data padding", __func__);
3289 return -1;
3290 }
3291 }
3292
3293 if (size_read + padding != size) {
3294 pr_err("%s: tracing data size mismatch", __func__);
3295 return -1;
3296 }
3297
3298 perf_evlist__prepare_tracepoint_events(session->evlist,
3299 session->tevent.pevent);
3300
3301 return size_read + padding;
3302}
3303
3304int perf_event__synthesize_build_id(struct perf_tool *tool,
3305 struct dso *pos, u16 misc,
3306 perf_event__handler_t process,
3307 struct machine *machine)
3308{
3309 union perf_event ev;
3310 size_t len;
3311 int err = 0;
3312
3313 if (!pos->hit)
3314 return err;
3315
3316 memset(&ev, 0, sizeof(ev));
3317
3318 len = pos->long_name_len + 1;
3319 len = PERF_ALIGN(len, NAME_ALIGN);
3320 memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
3321 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
3322 ev.build_id.header.misc = misc;
3323 ev.build_id.pid = machine->pid;
3324 ev.build_id.header.size = sizeof(ev.build_id) + len;
3325 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
3326
3327 err = process(tool, &ev, NULL, machine);
3328
3329 return err;
3330}
3331
3332int perf_event__process_build_id(struct perf_tool *tool __maybe_unused,
3333 union perf_event *event,
3334 struct perf_session *session)
3335{
3336 __event_process_build_id(&event->build_id,
3337 event->build_id.filename,
3338 session);
3339 return 0;
3340}
1// SPDX-License-Identifier: GPL-2.0
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 <regex.h>
10#include <stdio.h>
11#include <stdlib.h>
12#include <linux/compiler.h>
13#include <linux/list.h>
14#include <linux/kernel.h>
15#include <linux/bitops.h>
16#include <linux/string.h>
17#include <linux/stringify.h>
18#include <linux/zalloc.h>
19#include <sys/stat.h>
20#include <sys/utsname.h>
21#include <linux/time64.h>
22#include <dirent.h>
23#ifdef HAVE_LIBBPF_SUPPORT
24#include <bpf/libbpf.h>
25#endif
26#include <perf/cpumap.h>
27#include <tools/libc_compat.h> // reallocarray
28
29#include "dso.h"
30#include "evlist.h"
31#include "evsel.h"
32#include "util/evsel_fprintf.h"
33#include "header.h"
34#include "memswap.h"
35#include "trace-event.h"
36#include "session.h"
37#include "symbol.h"
38#include "debug.h"
39#include "cpumap.h"
40#include "pmu.h"
41#include "pmus.h"
42#include "vdso.h"
43#include "strbuf.h"
44#include "build-id.h"
45#include "data.h"
46#include <api/fs/fs.h>
47#include "asm/bug.h"
48#include "tool.h"
49#include "time-utils.h"
50#include "units.h"
51#include "util/util.h" // perf_exe()
52#include "cputopo.h"
53#include "bpf-event.h"
54#include "bpf-utils.h"
55#include "clockid.h"
56
57#include <linux/ctype.h>
58#include <internal/lib.h>
59
60#ifdef HAVE_LIBTRACEEVENT
61#include <event-parse.h>
62#endif
63
64/*
65 * magic2 = "PERFILE2"
66 * must be a numerical value to let the endianness
67 * determine the memory layout. That way we are able
68 * to detect endianness when reading the perf.data file
69 * back.
70 *
71 * we check for legacy (PERFFILE) format.
72 */
73static const char *__perf_magic1 = "PERFFILE";
74static const u64 __perf_magic2 = 0x32454c4946524550ULL;
75static const u64 __perf_magic2_sw = 0x50455246494c4532ULL;
76
77#define PERF_MAGIC __perf_magic2
78
79const char perf_version_string[] = PERF_VERSION;
80
81struct perf_file_attr {
82 struct perf_event_attr attr;
83 struct perf_file_section ids;
84};
85
86void perf_header__set_feat(struct perf_header *header, int feat)
87{
88 __set_bit(feat, header->adds_features);
89}
90
91void perf_header__clear_feat(struct perf_header *header, int feat)
92{
93 __clear_bit(feat, header->adds_features);
94}
95
96bool perf_header__has_feat(const struct perf_header *header, int feat)
97{
98 return test_bit(feat, header->adds_features);
99}
100
101static int __do_write_fd(struct feat_fd *ff, const void *buf, size_t size)
102{
103 ssize_t ret = writen(ff->fd, buf, size);
104
105 if (ret != (ssize_t)size)
106 return ret < 0 ? (int)ret : -1;
107 return 0;
108}
109
110static int __do_write_buf(struct feat_fd *ff, const void *buf, size_t size)
111{
112 /* struct perf_event_header::size is u16 */
113 const size_t max_size = 0xffff - sizeof(struct perf_event_header);
114 size_t new_size = ff->size;
115 void *addr;
116
117 if (size + ff->offset > max_size)
118 return -E2BIG;
119
120 while (size > (new_size - ff->offset))
121 new_size <<= 1;
122 new_size = min(max_size, new_size);
123
124 if (ff->size < new_size) {
125 addr = realloc(ff->buf, new_size);
126 if (!addr)
127 return -ENOMEM;
128 ff->buf = addr;
129 ff->size = new_size;
130 }
131
132 memcpy(ff->buf + ff->offset, buf, size);
133 ff->offset += size;
134
135 return 0;
136}
137
138/* Return: 0 if succeeded, -ERR if failed. */
139int do_write(struct feat_fd *ff, const void *buf, size_t size)
140{
141 if (!ff->buf)
142 return __do_write_fd(ff, buf, size);
143 return __do_write_buf(ff, buf, size);
144}
145
146/* Return: 0 if succeeded, -ERR if failed. */
147static int do_write_bitmap(struct feat_fd *ff, unsigned long *set, u64 size)
148{
149 u64 *p = (u64 *) set;
150 int i, ret;
151
152 ret = do_write(ff, &size, sizeof(size));
153 if (ret < 0)
154 return ret;
155
156 for (i = 0; (u64) i < BITS_TO_U64(size); i++) {
157 ret = do_write(ff, p + i, sizeof(*p));
158 if (ret < 0)
159 return ret;
160 }
161
162 return 0;
163}
164
165/* Return: 0 if succeeded, -ERR if failed. */
166int write_padded(struct feat_fd *ff, const void *bf,
167 size_t count, size_t count_aligned)
168{
169 static const char zero_buf[NAME_ALIGN];
170 int err = do_write(ff, bf, count);
171
172 if (!err)
173 err = do_write(ff, zero_buf, count_aligned - count);
174
175 return err;
176}
177
178#define string_size(str) \
179 (PERF_ALIGN((strlen(str) + 1), NAME_ALIGN) + sizeof(u32))
180
181/* Return: 0 if succeeded, -ERR if failed. */
182static int do_write_string(struct feat_fd *ff, const char *str)
183{
184 u32 len, olen;
185 int ret;
186
187 olen = strlen(str) + 1;
188 len = PERF_ALIGN(olen, NAME_ALIGN);
189
190 /* write len, incl. \0 */
191 ret = do_write(ff, &len, sizeof(len));
192 if (ret < 0)
193 return ret;
194
195 return write_padded(ff, str, olen, len);
196}
197
198static int __do_read_fd(struct feat_fd *ff, void *addr, ssize_t size)
199{
200 ssize_t ret = readn(ff->fd, addr, size);
201
202 if (ret != size)
203 return ret < 0 ? (int)ret : -1;
204 return 0;
205}
206
207static int __do_read_buf(struct feat_fd *ff, void *addr, ssize_t size)
208{
209 if (size > (ssize_t)ff->size - ff->offset)
210 return -1;
211
212 memcpy(addr, ff->buf + ff->offset, size);
213 ff->offset += size;
214
215 return 0;
216
217}
218
219static int __do_read(struct feat_fd *ff, void *addr, ssize_t size)
220{
221 if (!ff->buf)
222 return __do_read_fd(ff, addr, size);
223 return __do_read_buf(ff, addr, size);
224}
225
226static int do_read_u32(struct feat_fd *ff, u32 *addr)
227{
228 int ret;
229
230 ret = __do_read(ff, addr, sizeof(*addr));
231 if (ret)
232 return ret;
233
234 if (ff->ph->needs_swap)
235 *addr = bswap_32(*addr);
236 return 0;
237}
238
239static int do_read_u64(struct feat_fd *ff, u64 *addr)
240{
241 int ret;
242
243 ret = __do_read(ff, addr, sizeof(*addr));
244 if (ret)
245 return ret;
246
247 if (ff->ph->needs_swap)
248 *addr = bswap_64(*addr);
249 return 0;
250}
251
252static char *do_read_string(struct feat_fd *ff)
253{
254 u32 len;
255 char *buf;
256
257 if (do_read_u32(ff, &len))
258 return NULL;
259
260 buf = malloc(len);
261 if (!buf)
262 return NULL;
263
264 if (!__do_read(ff, buf, len)) {
265 /*
266 * strings are padded by zeroes
267 * thus the actual strlen of buf
268 * may be less than len
269 */
270 return buf;
271 }
272
273 free(buf);
274 return NULL;
275}
276
277/* Return: 0 if succeeded, -ERR if failed. */
278static int do_read_bitmap(struct feat_fd *ff, unsigned long **pset, u64 *psize)
279{
280 unsigned long *set;
281 u64 size, *p;
282 int i, ret;
283
284 ret = do_read_u64(ff, &size);
285 if (ret)
286 return ret;
287
288 set = bitmap_zalloc(size);
289 if (!set)
290 return -ENOMEM;
291
292 p = (u64 *) set;
293
294 for (i = 0; (u64) i < BITS_TO_U64(size); i++) {
295 ret = do_read_u64(ff, p + i);
296 if (ret < 0) {
297 free(set);
298 return ret;
299 }
300 }
301
302 *pset = set;
303 *psize = size;
304 return 0;
305}
306
307#ifdef HAVE_LIBTRACEEVENT
308static int write_tracing_data(struct feat_fd *ff,
309 struct evlist *evlist)
310{
311 if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__))
312 return -1;
313
314 return read_tracing_data(ff->fd, &evlist->core.entries);
315}
316#endif
317
318static int write_build_id(struct feat_fd *ff,
319 struct evlist *evlist __maybe_unused)
320{
321 struct perf_session *session;
322 int err;
323
324 session = container_of(ff->ph, struct perf_session, header);
325
326 if (!perf_session__read_build_ids(session, true))
327 return -1;
328
329 if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__))
330 return -1;
331
332 err = perf_session__write_buildid_table(session, ff);
333 if (err < 0) {
334 pr_debug("failed to write buildid table\n");
335 return err;
336 }
337 perf_session__cache_build_ids(session);
338
339 return 0;
340}
341
342static int write_hostname(struct feat_fd *ff,
343 struct evlist *evlist __maybe_unused)
344{
345 struct utsname uts;
346 int ret;
347
348 ret = uname(&uts);
349 if (ret < 0)
350 return -1;
351
352 return do_write_string(ff, uts.nodename);
353}
354
355static int write_osrelease(struct feat_fd *ff,
356 struct evlist *evlist __maybe_unused)
357{
358 struct utsname uts;
359 int ret;
360
361 ret = uname(&uts);
362 if (ret < 0)
363 return -1;
364
365 return do_write_string(ff, uts.release);
366}
367
368static int write_arch(struct feat_fd *ff,
369 struct evlist *evlist __maybe_unused)
370{
371 struct utsname uts;
372 int ret;
373
374 ret = uname(&uts);
375 if (ret < 0)
376 return -1;
377
378 return do_write_string(ff, uts.machine);
379}
380
381static int write_version(struct feat_fd *ff,
382 struct evlist *evlist __maybe_unused)
383{
384 return do_write_string(ff, perf_version_string);
385}
386
387static int __write_cpudesc(struct feat_fd *ff, const char *cpuinfo_proc)
388{
389 FILE *file;
390 char *buf = NULL;
391 char *s, *p;
392 const char *search = cpuinfo_proc;
393 size_t len = 0;
394 int ret = -1;
395
396 if (!search)
397 return -1;
398
399 file = fopen("/proc/cpuinfo", "r");
400 if (!file)
401 return -1;
402
403 while (getline(&buf, &len, file) > 0) {
404 ret = strncmp(buf, search, strlen(search));
405 if (!ret)
406 break;
407 }
408
409 if (ret) {
410 ret = -1;
411 goto done;
412 }
413
414 s = buf;
415
416 p = strchr(buf, ':');
417 if (p && *(p+1) == ' ' && *(p+2))
418 s = p + 2;
419 p = strchr(s, '\n');
420 if (p)
421 *p = '\0';
422
423 /* squash extra space characters (branding string) */
424 p = s;
425 while (*p) {
426 if (isspace(*p)) {
427 char *r = p + 1;
428 char *q = skip_spaces(r);
429 *p = ' ';
430 if (q != (p+1))
431 while ((*r++ = *q++));
432 }
433 p++;
434 }
435 ret = do_write_string(ff, s);
436done:
437 free(buf);
438 fclose(file);
439 return ret;
440}
441
442static int write_cpudesc(struct feat_fd *ff,
443 struct evlist *evlist __maybe_unused)
444{
445#if defined(__powerpc__) || defined(__hppa__) || defined(__sparc__)
446#define CPUINFO_PROC { "cpu", }
447#elif defined(__s390__)
448#define CPUINFO_PROC { "vendor_id", }
449#elif defined(__sh__)
450#define CPUINFO_PROC { "cpu type", }
451#elif defined(__alpha__) || defined(__mips__)
452#define CPUINFO_PROC { "cpu model", }
453#elif defined(__arm__)
454#define CPUINFO_PROC { "model name", "Processor", }
455#elif defined(__arc__)
456#define CPUINFO_PROC { "Processor", }
457#elif defined(__xtensa__)
458#define CPUINFO_PROC { "core ID", }
459#elif defined(__loongarch__)
460#define CPUINFO_PROC { "Model Name", }
461#else
462#define CPUINFO_PROC { "model name", }
463#endif
464 const char *cpuinfo_procs[] = CPUINFO_PROC;
465#undef CPUINFO_PROC
466 unsigned int i;
467
468 for (i = 0; i < ARRAY_SIZE(cpuinfo_procs); i++) {
469 int ret;
470 ret = __write_cpudesc(ff, cpuinfo_procs[i]);
471 if (ret >= 0)
472 return ret;
473 }
474 return -1;
475}
476
477
478static int write_nrcpus(struct feat_fd *ff,
479 struct evlist *evlist __maybe_unused)
480{
481 long nr;
482 u32 nrc, nra;
483 int ret;
484
485 nrc = cpu__max_present_cpu().cpu;
486
487 nr = sysconf(_SC_NPROCESSORS_ONLN);
488 if (nr < 0)
489 return -1;
490
491 nra = (u32)(nr & UINT_MAX);
492
493 ret = do_write(ff, &nrc, sizeof(nrc));
494 if (ret < 0)
495 return ret;
496
497 return do_write(ff, &nra, sizeof(nra));
498}
499
500static int write_event_desc(struct feat_fd *ff,
501 struct evlist *evlist)
502{
503 struct evsel *evsel;
504 u32 nre, nri, sz;
505 int ret;
506
507 nre = evlist->core.nr_entries;
508
509 /*
510 * write number of events
511 */
512 ret = do_write(ff, &nre, sizeof(nre));
513 if (ret < 0)
514 return ret;
515
516 /*
517 * size of perf_event_attr struct
518 */
519 sz = (u32)sizeof(evsel->core.attr);
520 ret = do_write(ff, &sz, sizeof(sz));
521 if (ret < 0)
522 return ret;
523
524 evlist__for_each_entry(evlist, evsel) {
525 ret = do_write(ff, &evsel->core.attr, sz);
526 if (ret < 0)
527 return ret;
528 /*
529 * write number of unique id per event
530 * there is one id per instance of an event
531 *
532 * copy into an nri to be independent of the
533 * type of ids,
534 */
535 nri = evsel->core.ids;
536 ret = do_write(ff, &nri, sizeof(nri));
537 if (ret < 0)
538 return ret;
539
540 /*
541 * write event string as passed on cmdline
542 */
543 ret = do_write_string(ff, evsel__name(evsel));
544 if (ret < 0)
545 return ret;
546 /*
547 * write unique ids for this event
548 */
549 ret = do_write(ff, evsel->core.id, evsel->core.ids * sizeof(u64));
550 if (ret < 0)
551 return ret;
552 }
553 return 0;
554}
555
556static int write_cmdline(struct feat_fd *ff,
557 struct evlist *evlist __maybe_unused)
558{
559 char pbuf[MAXPATHLEN], *buf;
560 int i, ret, n;
561
562 /* actual path to perf binary */
563 buf = perf_exe(pbuf, MAXPATHLEN);
564
565 /* account for binary path */
566 n = perf_env.nr_cmdline + 1;
567
568 ret = do_write(ff, &n, sizeof(n));
569 if (ret < 0)
570 return ret;
571
572 ret = do_write_string(ff, buf);
573 if (ret < 0)
574 return ret;
575
576 for (i = 0 ; i < perf_env.nr_cmdline; i++) {
577 ret = do_write_string(ff, perf_env.cmdline_argv[i]);
578 if (ret < 0)
579 return ret;
580 }
581 return 0;
582}
583
584
585static int write_cpu_topology(struct feat_fd *ff,
586 struct evlist *evlist __maybe_unused)
587{
588 struct cpu_topology *tp;
589 u32 i;
590 int ret, j;
591
592 tp = cpu_topology__new();
593 if (!tp)
594 return -1;
595
596 ret = do_write(ff, &tp->package_cpus_lists, sizeof(tp->package_cpus_lists));
597 if (ret < 0)
598 goto done;
599
600 for (i = 0; i < tp->package_cpus_lists; i++) {
601 ret = do_write_string(ff, tp->package_cpus_list[i]);
602 if (ret < 0)
603 goto done;
604 }
605 ret = do_write(ff, &tp->core_cpus_lists, sizeof(tp->core_cpus_lists));
606 if (ret < 0)
607 goto done;
608
609 for (i = 0; i < tp->core_cpus_lists; i++) {
610 ret = do_write_string(ff, tp->core_cpus_list[i]);
611 if (ret < 0)
612 break;
613 }
614
615 ret = perf_env__read_cpu_topology_map(&perf_env);
616 if (ret < 0)
617 goto done;
618
619 for (j = 0; j < perf_env.nr_cpus_avail; j++) {
620 ret = do_write(ff, &perf_env.cpu[j].core_id,
621 sizeof(perf_env.cpu[j].core_id));
622 if (ret < 0)
623 return ret;
624 ret = do_write(ff, &perf_env.cpu[j].socket_id,
625 sizeof(perf_env.cpu[j].socket_id));
626 if (ret < 0)
627 return ret;
628 }
629
630 if (!tp->die_cpus_lists)
631 goto done;
632
633 ret = do_write(ff, &tp->die_cpus_lists, sizeof(tp->die_cpus_lists));
634 if (ret < 0)
635 goto done;
636
637 for (i = 0; i < tp->die_cpus_lists; i++) {
638 ret = do_write_string(ff, tp->die_cpus_list[i]);
639 if (ret < 0)
640 goto done;
641 }
642
643 for (j = 0; j < perf_env.nr_cpus_avail; j++) {
644 ret = do_write(ff, &perf_env.cpu[j].die_id,
645 sizeof(perf_env.cpu[j].die_id));
646 if (ret < 0)
647 return ret;
648 }
649
650done:
651 cpu_topology__delete(tp);
652 return ret;
653}
654
655
656
657static int write_total_mem(struct feat_fd *ff,
658 struct evlist *evlist __maybe_unused)
659{
660 char *buf = NULL;
661 FILE *fp;
662 size_t len = 0;
663 int ret = -1, n;
664 uint64_t mem;
665
666 fp = fopen("/proc/meminfo", "r");
667 if (!fp)
668 return -1;
669
670 while (getline(&buf, &len, fp) > 0) {
671 ret = strncmp(buf, "MemTotal:", 9);
672 if (!ret)
673 break;
674 }
675 if (!ret) {
676 n = sscanf(buf, "%*s %"PRIu64, &mem);
677 if (n == 1)
678 ret = do_write(ff, &mem, sizeof(mem));
679 } else
680 ret = -1;
681 free(buf);
682 fclose(fp);
683 return ret;
684}
685
686static int write_numa_topology(struct feat_fd *ff,
687 struct evlist *evlist __maybe_unused)
688{
689 struct numa_topology *tp;
690 int ret = -1;
691 u32 i;
692
693 tp = numa_topology__new();
694 if (!tp)
695 return -ENOMEM;
696
697 ret = do_write(ff, &tp->nr, sizeof(u32));
698 if (ret < 0)
699 goto err;
700
701 for (i = 0; i < tp->nr; i++) {
702 struct numa_topology_node *n = &tp->nodes[i];
703
704 ret = do_write(ff, &n->node, sizeof(u32));
705 if (ret < 0)
706 goto err;
707
708 ret = do_write(ff, &n->mem_total, sizeof(u64));
709 if (ret)
710 goto err;
711
712 ret = do_write(ff, &n->mem_free, sizeof(u64));
713 if (ret)
714 goto err;
715
716 ret = do_write_string(ff, n->cpus);
717 if (ret < 0)
718 goto err;
719 }
720
721 ret = 0;
722
723err:
724 numa_topology__delete(tp);
725 return ret;
726}
727
728/*
729 * File format:
730 *
731 * struct pmu_mappings {
732 * u32 pmu_num;
733 * struct pmu_map {
734 * u32 type;
735 * char name[];
736 * }[pmu_num];
737 * };
738 */
739
740static int write_pmu_mappings(struct feat_fd *ff,
741 struct evlist *evlist __maybe_unused)
742{
743 struct perf_pmu *pmu = NULL;
744 u32 pmu_num = 0;
745 int ret;
746
747 /*
748 * Do a first pass to count number of pmu to avoid lseek so this
749 * works in pipe mode as well.
750 */
751 while ((pmu = perf_pmus__scan(pmu)))
752 pmu_num++;
753
754 ret = do_write(ff, &pmu_num, sizeof(pmu_num));
755 if (ret < 0)
756 return ret;
757
758 while ((pmu = perf_pmus__scan(pmu))) {
759 ret = do_write(ff, &pmu->type, sizeof(pmu->type));
760 if (ret < 0)
761 return ret;
762
763 ret = do_write_string(ff, pmu->name);
764 if (ret < 0)
765 return ret;
766 }
767
768 return 0;
769}
770
771/*
772 * File format:
773 *
774 * struct group_descs {
775 * u32 nr_groups;
776 * struct group_desc {
777 * char name[];
778 * u32 leader_idx;
779 * u32 nr_members;
780 * }[nr_groups];
781 * };
782 */
783static int write_group_desc(struct feat_fd *ff,
784 struct evlist *evlist)
785{
786 u32 nr_groups = evlist__nr_groups(evlist);
787 struct evsel *evsel;
788 int ret;
789
790 ret = do_write(ff, &nr_groups, sizeof(nr_groups));
791 if (ret < 0)
792 return ret;
793
794 evlist__for_each_entry(evlist, evsel) {
795 if (evsel__is_group_leader(evsel) && evsel->core.nr_members > 1) {
796 const char *name = evsel->group_name ?: "{anon_group}";
797 u32 leader_idx = evsel->core.idx;
798 u32 nr_members = evsel->core.nr_members;
799
800 ret = do_write_string(ff, name);
801 if (ret < 0)
802 return ret;
803
804 ret = do_write(ff, &leader_idx, sizeof(leader_idx));
805 if (ret < 0)
806 return ret;
807
808 ret = do_write(ff, &nr_members, sizeof(nr_members));
809 if (ret < 0)
810 return ret;
811 }
812 }
813 return 0;
814}
815
816/*
817 * Return the CPU id as a raw string.
818 *
819 * Each architecture should provide a more precise id string that
820 * can be use to match the architecture's "mapfile".
821 */
822char * __weak get_cpuid_str(struct perf_cpu cpu __maybe_unused)
823{
824 return NULL;
825}
826
827char *get_cpuid_allow_env_override(struct perf_cpu cpu)
828{
829 char *cpuid;
830 static bool printed;
831
832 cpuid = getenv("PERF_CPUID");
833 if (cpuid)
834 cpuid = strdup(cpuid);
835 if (!cpuid)
836 cpuid = get_cpuid_str(cpu);
837 if (!cpuid)
838 return NULL;
839
840 if (!printed) {
841 pr_debug("Using CPUID %s\n", cpuid);
842 printed = true;
843 }
844 return cpuid;
845}
846
847/* Return zero when the cpuid from the mapfile.csv matches the
848 * cpuid string generated on this platform.
849 * Otherwise return non-zero.
850 */
851int __weak strcmp_cpuid_str(const char *mapcpuid, const char *cpuid)
852{
853 regex_t re;
854 regmatch_t pmatch[1];
855 int match;
856
857 if (regcomp(&re, mapcpuid, REG_EXTENDED) != 0) {
858 /* Warn unable to generate match particular string. */
859 pr_info("Invalid regular expression %s\n", mapcpuid);
860 return 1;
861 }
862
863 match = !regexec(&re, cpuid, 1, pmatch, 0);
864 regfree(&re);
865 if (match) {
866 size_t match_len = (pmatch[0].rm_eo - pmatch[0].rm_so);
867
868 /* Verify the entire string matched. */
869 if (match_len == strlen(cpuid))
870 return 0;
871 }
872 return 1;
873}
874
875/*
876 * default get_cpuid(): nothing gets recorded
877 * actual implementation must be in arch/$(SRCARCH)/util/header.c
878 */
879int __weak get_cpuid(char *buffer __maybe_unused, size_t sz __maybe_unused,
880 struct perf_cpu cpu __maybe_unused)
881{
882 return ENOSYS; /* Not implemented */
883}
884
885static int write_cpuid(struct feat_fd *ff, struct evlist *evlist)
886{
887 struct perf_cpu cpu = perf_cpu_map__min(evlist->core.all_cpus);
888 char buffer[64];
889 int ret;
890
891 ret = get_cpuid(buffer, sizeof(buffer), cpu);
892 if (ret)
893 return -1;
894
895 return do_write_string(ff, buffer);
896}
897
898static int write_branch_stack(struct feat_fd *ff __maybe_unused,
899 struct evlist *evlist __maybe_unused)
900{
901 return 0;
902}
903
904static int write_auxtrace(struct feat_fd *ff,
905 struct evlist *evlist __maybe_unused)
906{
907 struct perf_session *session;
908 int err;
909
910 if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__))
911 return -1;
912
913 session = container_of(ff->ph, struct perf_session, header);
914
915 err = auxtrace_index__write(ff->fd, &session->auxtrace_index);
916 if (err < 0)
917 pr_err("Failed to write auxtrace index\n");
918 return err;
919}
920
921static int write_clockid(struct feat_fd *ff,
922 struct evlist *evlist __maybe_unused)
923{
924 return do_write(ff, &ff->ph->env.clock.clockid_res_ns,
925 sizeof(ff->ph->env.clock.clockid_res_ns));
926}
927
928static int write_clock_data(struct feat_fd *ff,
929 struct evlist *evlist __maybe_unused)
930{
931 u64 *data64;
932 u32 data32;
933 int ret;
934
935 /* version */
936 data32 = 1;
937
938 ret = do_write(ff, &data32, sizeof(data32));
939 if (ret < 0)
940 return ret;
941
942 /* clockid */
943 data32 = ff->ph->env.clock.clockid;
944
945 ret = do_write(ff, &data32, sizeof(data32));
946 if (ret < 0)
947 return ret;
948
949 /* TOD ref time */
950 data64 = &ff->ph->env.clock.tod_ns;
951
952 ret = do_write(ff, data64, sizeof(*data64));
953 if (ret < 0)
954 return ret;
955
956 /* clockid ref time */
957 data64 = &ff->ph->env.clock.clockid_ns;
958
959 return do_write(ff, data64, sizeof(*data64));
960}
961
962static int write_hybrid_topology(struct feat_fd *ff,
963 struct evlist *evlist __maybe_unused)
964{
965 struct hybrid_topology *tp;
966 int ret;
967 u32 i;
968
969 tp = hybrid_topology__new();
970 if (!tp)
971 return -ENOENT;
972
973 ret = do_write(ff, &tp->nr, sizeof(u32));
974 if (ret < 0)
975 goto err;
976
977 for (i = 0; i < tp->nr; i++) {
978 struct hybrid_topology_node *n = &tp->nodes[i];
979
980 ret = do_write_string(ff, n->pmu_name);
981 if (ret < 0)
982 goto err;
983
984 ret = do_write_string(ff, n->cpus);
985 if (ret < 0)
986 goto err;
987 }
988
989 ret = 0;
990
991err:
992 hybrid_topology__delete(tp);
993 return ret;
994}
995
996static int write_dir_format(struct feat_fd *ff,
997 struct evlist *evlist __maybe_unused)
998{
999 struct perf_session *session;
1000 struct perf_data *data;
1001
1002 session = container_of(ff->ph, struct perf_session, header);
1003 data = session->data;
1004
1005 if (WARN_ON(!perf_data__is_dir(data)))
1006 return -1;
1007
1008 return do_write(ff, &data->dir.version, sizeof(data->dir.version));
1009}
1010
1011#ifdef HAVE_LIBBPF_SUPPORT
1012static int write_bpf_prog_info(struct feat_fd *ff,
1013 struct evlist *evlist __maybe_unused)
1014{
1015 struct perf_env *env = &ff->ph->env;
1016 struct rb_root *root;
1017 struct rb_node *next;
1018 int ret;
1019
1020 down_read(&env->bpf_progs.lock);
1021
1022 ret = do_write(ff, &env->bpf_progs.infos_cnt,
1023 sizeof(env->bpf_progs.infos_cnt));
1024 if (ret < 0)
1025 goto out;
1026
1027 root = &env->bpf_progs.infos;
1028 next = rb_first(root);
1029 while (next) {
1030 struct bpf_prog_info_node *node;
1031 size_t len;
1032
1033 node = rb_entry(next, struct bpf_prog_info_node, rb_node);
1034 next = rb_next(&node->rb_node);
1035 len = sizeof(struct perf_bpil) +
1036 node->info_linear->data_len;
1037
1038 /* before writing to file, translate address to offset */
1039 bpil_addr_to_offs(node->info_linear);
1040 ret = do_write(ff, node->info_linear, len);
1041 /*
1042 * translate back to address even when do_write() fails,
1043 * so that this function never changes the data.
1044 */
1045 bpil_offs_to_addr(node->info_linear);
1046 if (ret < 0)
1047 goto out;
1048 }
1049out:
1050 up_read(&env->bpf_progs.lock);
1051 return ret;
1052}
1053
1054static int write_bpf_btf(struct feat_fd *ff,
1055 struct evlist *evlist __maybe_unused)
1056{
1057 struct perf_env *env = &ff->ph->env;
1058 struct rb_root *root;
1059 struct rb_node *next;
1060 int ret;
1061
1062 down_read(&env->bpf_progs.lock);
1063
1064 ret = do_write(ff, &env->bpf_progs.btfs_cnt,
1065 sizeof(env->bpf_progs.btfs_cnt));
1066
1067 if (ret < 0)
1068 goto out;
1069
1070 root = &env->bpf_progs.btfs;
1071 next = rb_first(root);
1072 while (next) {
1073 struct btf_node *node;
1074
1075 node = rb_entry(next, struct btf_node, rb_node);
1076 next = rb_next(&node->rb_node);
1077 ret = do_write(ff, &node->id,
1078 sizeof(u32) * 2 + node->data_size);
1079 if (ret < 0)
1080 goto out;
1081 }
1082out:
1083 up_read(&env->bpf_progs.lock);
1084 return ret;
1085}
1086#endif // HAVE_LIBBPF_SUPPORT
1087
1088static int cpu_cache_level__sort(const void *a, const void *b)
1089{
1090 struct cpu_cache_level *cache_a = (struct cpu_cache_level *)a;
1091 struct cpu_cache_level *cache_b = (struct cpu_cache_level *)b;
1092
1093 return cache_a->level - cache_b->level;
1094}
1095
1096static bool cpu_cache_level__cmp(struct cpu_cache_level *a, struct cpu_cache_level *b)
1097{
1098 if (a->level != b->level)
1099 return false;
1100
1101 if (a->line_size != b->line_size)
1102 return false;
1103
1104 if (a->sets != b->sets)
1105 return false;
1106
1107 if (a->ways != b->ways)
1108 return false;
1109
1110 if (strcmp(a->type, b->type))
1111 return false;
1112
1113 if (strcmp(a->size, b->size))
1114 return false;
1115
1116 if (strcmp(a->map, b->map))
1117 return false;
1118
1119 return true;
1120}
1121
1122static int cpu_cache_level__read(struct cpu_cache_level *cache, u32 cpu, u16 level)
1123{
1124 char path[PATH_MAX], file[PATH_MAX];
1125 struct stat st;
1126 size_t len;
1127
1128 scnprintf(path, PATH_MAX, "devices/system/cpu/cpu%d/cache/index%d/", cpu, level);
1129 scnprintf(file, PATH_MAX, "%s/%s", sysfs__mountpoint(), path);
1130
1131 if (stat(file, &st))
1132 return 1;
1133
1134 scnprintf(file, PATH_MAX, "%s/level", path);
1135 if (sysfs__read_int(file, (int *) &cache->level))
1136 return -1;
1137
1138 scnprintf(file, PATH_MAX, "%s/coherency_line_size", path);
1139 if (sysfs__read_int(file, (int *) &cache->line_size))
1140 return -1;
1141
1142 scnprintf(file, PATH_MAX, "%s/number_of_sets", path);
1143 if (sysfs__read_int(file, (int *) &cache->sets))
1144 return -1;
1145
1146 scnprintf(file, PATH_MAX, "%s/ways_of_associativity", path);
1147 if (sysfs__read_int(file, (int *) &cache->ways))
1148 return -1;
1149
1150 scnprintf(file, PATH_MAX, "%s/type", path);
1151 if (sysfs__read_str(file, &cache->type, &len))
1152 return -1;
1153
1154 cache->type[len] = 0;
1155 cache->type = strim(cache->type);
1156
1157 scnprintf(file, PATH_MAX, "%s/size", path);
1158 if (sysfs__read_str(file, &cache->size, &len)) {
1159 zfree(&cache->type);
1160 return -1;
1161 }
1162
1163 cache->size[len] = 0;
1164 cache->size = strim(cache->size);
1165
1166 scnprintf(file, PATH_MAX, "%s/shared_cpu_list", path);
1167 if (sysfs__read_str(file, &cache->map, &len)) {
1168 zfree(&cache->size);
1169 zfree(&cache->type);
1170 return -1;
1171 }
1172
1173 cache->map[len] = 0;
1174 cache->map = strim(cache->map);
1175 return 0;
1176}
1177
1178static void cpu_cache_level__fprintf(FILE *out, struct cpu_cache_level *c)
1179{
1180 fprintf(out, "L%d %-15s %8s [%s]\n", c->level, c->type, c->size, c->map);
1181}
1182
1183/*
1184 * Build caches levels for a particular CPU from the data in
1185 * /sys/devices/system/cpu/cpu<cpu>/cache/
1186 * The cache level data is stored in caches[] from index at
1187 * *cntp.
1188 */
1189int build_caches_for_cpu(u32 cpu, struct cpu_cache_level caches[], u32 *cntp)
1190{
1191 u16 level;
1192
1193 for (level = 0; level < MAX_CACHE_LVL; level++) {
1194 struct cpu_cache_level c;
1195 int err;
1196 u32 i;
1197
1198 err = cpu_cache_level__read(&c, cpu, level);
1199 if (err < 0)
1200 return err;
1201
1202 if (err == 1)
1203 break;
1204
1205 for (i = 0; i < *cntp; i++) {
1206 if (cpu_cache_level__cmp(&c, &caches[i]))
1207 break;
1208 }
1209
1210 if (i == *cntp) {
1211 caches[*cntp] = c;
1212 *cntp = *cntp + 1;
1213 } else
1214 cpu_cache_level__free(&c);
1215 }
1216
1217 return 0;
1218}
1219
1220static int build_caches(struct cpu_cache_level caches[], u32 *cntp)
1221{
1222 u32 nr, cpu, cnt = 0;
1223
1224 nr = cpu__max_cpu().cpu;
1225
1226 for (cpu = 0; cpu < nr; cpu++) {
1227 int ret = build_caches_for_cpu(cpu, caches, &cnt);
1228
1229 if (ret)
1230 return ret;
1231 }
1232 *cntp = cnt;
1233 return 0;
1234}
1235
1236static int write_cache(struct feat_fd *ff,
1237 struct evlist *evlist __maybe_unused)
1238{
1239 u32 max_caches = cpu__max_cpu().cpu * MAX_CACHE_LVL;
1240 struct cpu_cache_level caches[max_caches];
1241 u32 cnt = 0, i, version = 1;
1242 int ret;
1243
1244 ret = build_caches(caches, &cnt);
1245 if (ret)
1246 goto out;
1247
1248 qsort(&caches, cnt, sizeof(struct cpu_cache_level), cpu_cache_level__sort);
1249
1250 ret = do_write(ff, &version, sizeof(u32));
1251 if (ret < 0)
1252 goto out;
1253
1254 ret = do_write(ff, &cnt, sizeof(u32));
1255 if (ret < 0)
1256 goto out;
1257
1258 for (i = 0; i < cnt; i++) {
1259 struct cpu_cache_level *c = &caches[i];
1260
1261 #define _W(v) \
1262 ret = do_write(ff, &c->v, sizeof(u32)); \
1263 if (ret < 0) \
1264 goto out;
1265
1266 _W(level)
1267 _W(line_size)
1268 _W(sets)
1269 _W(ways)
1270 #undef _W
1271
1272 #define _W(v) \
1273 ret = do_write_string(ff, (const char *) c->v); \
1274 if (ret < 0) \
1275 goto out;
1276
1277 _W(type)
1278 _W(size)
1279 _W(map)
1280 #undef _W
1281 }
1282
1283out:
1284 for (i = 0; i < cnt; i++)
1285 cpu_cache_level__free(&caches[i]);
1286 return ret;
1287}
1288
1289static int write_stat(struct feat_fd *ff __maybe_unused,
1290 struct evlist *evlist __maybe_unused)
1291{
1292 return 0;
1293}
1294
1295static int write_sample_time(struct feat_fd *ff,
1296 struct evlist *evlist)
1297{
1298 int ret;
1299
1300 ret = do_write(ff, &evlist->first_sample_time,
1301 sizeof(evlist->first_sample_time));
1302 if (ret < 0)
1303 return ret;
1304
1305 return do_write(ff, &evlist->last_sample_time,
1306 sizeof(evlist->last_sample_time));
1307}
1308
1309
1310static int memory_node__read(struct memory_node *n, unsigned long idx)
1311{
1312 unsigned int phys, size = 0;
1313 char path[PATH_MAX];
1314 struct dirent *ent;
1315 DIR *dir;
1316
1317#define for_each_memory(mem, dir) \
1318 while ((ent = readdir(dir))) \
1319 if (strcmp(ent->d_name, ".") && \
1320 strcmp(ent->d_name, "..") && \
1321 sscanf(ent->d_name, "memory%u", &mem) == 1)
1322
1323 scnprintf(path, PATH_MAX,
1324 "%s/devices/system/node/node%lu",
1325 sysfs__mountpoint(), idx);
1326
1327 dir = opendir(path);
1328 if (!dir) {
1329 pr_warning("failed: can't open memory sysfs data\n");
1330 return -1;
1331 }
1332
1333 for_each_memory(phys, dir) {
1334 size = max(phys, size);
1335 }
1336
1337 size++;
1338
1339 n->set = bitmap_zalloc(size);
1340 if (!n->set) {
1341 closedir(dir);
1342 return -ENOMEM;
1343 }
1344
1345 n->node = idx;
1346 n->size = size;
1347
1348 rewinddir(dir);
1349
1350 for_each_memory(phys, dir) {
1351 __set_bit(phys, n->set);
1352 }
1353
1354 closedir(dir);
1355 return 0;
1356}
1357
1358static void memory_node__delete_nodes(struct memory_node *nodesp, u64 cnt)
1359{
1360 for (u64 i = 0; i < cnt; i++)
1361 bitmap_free(nodesp[i].set);
1362
1363 free(nodesp);
1364}
1365
1366static int memory_node__sort(const void *a, const void *b)
1367{
1368 const struct memory_node *na = a;
1369 const struct memory_node *nb = b;
1370
1371 return na->node - nb->node;
1372}
1373
1374static int build_mem_topology(struct memory_node **nodesp, u64 *cntp)
1375{
1376 char path[PATH_MAX];
1377 struct dirent *ent;
1378 DIR *dir;
1379 int ret = 0;
1380 size_t cnt = 0, size = 0;
1381 struct memory_node *nodes = NULL;
1382
1383 scnprintf(path, PATH_MAX, "%s/devices/system/node/",
1384 sysfs__mountpoint());
1385
1386 dir = opendir(path);
1387 if (!dir) {
1388 pr_debug2("%s: couldn't read %s, does this arch have topology information?\n",
1389 __func__, path);
1390 return -1;
1391 }
1392
1393 while (!ret && (ent = readdir(dir))) {
1394 unsigned int idx;
1395 int r;
1396
1397 if (!strcmp(ent->d_name, ".") ||
1398 !strcmp(ent->d_name, ".."))
1399 continue;
1400
1401 r = sscanf(ent->d_name, "node%u", &idx);
1402 if (r != 1)
1403 continue;
1404
1405 if (cnt >= size) {
1406 struct memory_node *new_nodes =
1407 reallocarray(nodes, cnt + 4, sizeof(*nodes));
1408
1409 if (!new_nodes) {
1410 pr_err("Failed to write MEM_TOPOLOGY, size %zd nodes\n", size);
1411 ret = -ENOMEM;
1412 goto out;
1413 }
1414 nodes = new_nodes;
1415 size += 4;
1416 }
1417 ret = memory_node__read(&nodes[cnt], idx);
1418 if (!ret)
1419 cnt += 1;
1420 }
1421out:
1422 closedir(dir);
1423 if (!ret) {
1424 *cntp = cnt;
1425 *nodesp = nodes;
1426 qsort(nodes, cnt, sizeof(nodes[0]), memory_node__sort);
1427 } else
1428 memory_node__delete_nodes(nodes, cnt);
1429
1430 return ret;
1431}
1432
1433/*
1434 * The MEM_TOPOLOGY holds physical memory map for every
1435 * node in system. The format of data is as follows:
1436 *
1437 * 0 - version | for future changes
1438 * 8 - block_size_bytes | /sys/devices/system/memory/block_size_bytes
1439 * 16 - count | number of nodes
1440 *
1441 * For each node we store map of physical indexes for
1442 * each node:
1443 *
1444 * 32 - node id | node index
1445 * 40 - size | size of bitmap
1446 * 48 - bitmap | bitmap of memory indexes that belongs to node
1447 */
1448static int write_mem_topology(struct feat_fd *ff __maybe_unused,
1449 struct evlist *evlist __maybe_unused)
1450{
1451 struct memory_node *nodes = NULL;
1452 u64 bsize, version = 1, i, nr = 0;
1453 int ret;
1454
1455 ret = sysfs__read_xll("devices/system/memory/block_size_bytes",
1456 (unsigned long long *) &bsize);
1457 if (ret)
1458 return ret;
1459
1460 ret = build_mem_topology(&nodes, &nr);
1461 if (ret)
1462 return ret;
1463
1464 ret = do_write(ff, &version, sizeof(version));
1465 if (ret < 0)
1466 goto out;
1467
1468 ret = do_write(ff, &bsize, sizeof(bsize));
1469 if (ret < 0)
1470 goto out;
1471
1472 ret = do_write(ff, &nr, sizeof(nr));
1473 if (ret < 0)
1474 goto out;
1475
1476 for (i = 0; i < nr; i++) {
1477 struct memory_node *n = &nodes[i];
1478
1479 #define _W(v) \
1480 ret = do_write(ff, &n->v, sizeof(n->v)); \
1481 if (ret < 0) \
1482 goto out;
1483
1484 _W(node)
1485 _W(size)
1486
1487 #undef _W
1488
1489 ret = do_write_bitmap(ff, n->set, n->size);
1490 if (ret < 0)
1491 goto out;
1492 }
1493
1494out:
1495 memory_node__delete_nodes(nodes, nr);
1496 return ret;
1497}
1498
1499static int write_compressed(struct feat_fd *ff __maybe_unused,
1500 struct evlist *evlist __maybe_unused)
1501{
1502 int ret;
1503
1504 ret = do_write(ff, &(ff->ph->env.comp_ver), sizeof(ff->ph->env.comp_ver));
1505 if (ret)
1506 return ret;
1507
1508 ret = do_write(ff, &(ff->ph->env.comp_type), sizeof(ff->ph->env.comp_type));
1509 if (ret)
1510 return ret;
1511
1512 ret = do_write(ff, &(ff->ph->env.comp_level), sizeof(ff->ph->env.comp_level));
1513 if (ret)
1514 return ret;
1515
1516 ret = do_write(ff, &(ff->ph->env.comp_ratio), sizeof(ff->ph->env.comp_ratio));
1517 if (ret)
1518 return ret;
1519
1520 return do_write(ff, &(ff->ph->env.comp_mmap_len), sizeof(ff->ph->env.comp_mmap_len));
1521}
1522
1523static int __write_pmu_caps(struct feat_fd *ff, struct perf_pmu *pmu,
1524 bool write_pmu)
1525{
1526 struct perf_pmu_caps *caps = NULL;
1527 int ret;
1528
1529 ret = do_write(ff, &pmu->nr_caps, sizeof(pmu->nr_caps));
1530 if (ret < 0)
1531 return ret;
1532
1533 list_for_each_entry(caps, &pmu->caps, list) {
1534 ret = do_write_string(ff, caps->name);
1535 if (ret < 0)
1536 return ret;
1537
1538 ret = do_write_string(ff, caps->value);
1539 if (ret < 0)
1540 return ret;
1541 }
1542
1543 if (write_pmu) {
1544 ret = do_write_string(ff, pmu->name);
1545 if (ret < 0)
1546 return ret;
1547 }
1548
1549 return ret;
1550}
1551
1552static int write_cpu_pmu_caps(struct feat_fd *ff,
1553 struct evlist *evlist __maybe_unused)
1554{
1555 struct perf_pmu *cpu_pmu = perf_pmus__find("cpu");
1556 int ret;
1557
1558 if (!cpu_pmu)
1559 return -ENOENT;
1560
1561 ret = perf_pmu__caps_parse(cpu_pmu);
1562 if (ret < 0)
1563 return ret;
1564
1565 return __write_pmu_caps(ff, cpu_pmu, false);
1566}
1567
1568static int write_pmu_caps(struct feat_fd *ff,
1569 struct evlist *evlist __maybe_unused)
1570{
1571 struct perf_pmu *pmu = NULL;
1572 int nr_pmu = 0;
1573 int ret;
1574
1575 while ((pmu = perf_pmus__scan(pmu))) {
1576 if (!strcmp(pmu->name, "cpu")) {
1577 /*
1578 * The "cpu" PMU is special and covered by
1579 * HEADER_CPU_PMU_CAPS. Note, core PMUs are
1580 * counted/written here for ARM, s390 and Intel hybrid.
1581 */
1582 continue;
1583 }
1584 if (perf_pmu__caps_parse(pmu) <= 0)
1585 continue;
1586 nr_pmu++;
1587 }
1588
1589 ret = do_write(ff, &nr_pmu, sizeof(nr_pmu));
1590 if (ret < 0)
1591 return ret;
1592
1593 if (!nr_pmu)
1594 return 0;
1595
1596 /*
1597 * Note older perf tools assume core PMUs come first, this is a property
1598 * of perf_pmus__scan.
1599 */
1600 pmu = NULL;
1601 while ((pmu = perf_pmus__scan(pmu))) {
1602 if (!strcmp(pmu->name, "cpu")) {
1603 /* Skip as above. */
1604 continue;
1605 }
1606 if (perf_pmu__caps_parse(pmu) <= 0)
1607 continue;
1608 ret = __write_pmu_caps(ff, pmu, true);
1609 if (ret < 0)
1610 return ret;
1611 }
1612 return 0;
1613}
1614
1615static void print_hostname(struct feat_fd *ff, FILE *fp)
1616{
1617 fprintf(fp, "# hostname : %s\n", ff->ph->env.hostname);
1618}
1619
1620static void print_osrelease(struct feat_fd *ff, FILE *fp)
1621{
1622 fprintf(fp, "# os release : %s\n", ff->ph->env.os_release);
1623}
1624
1625static void print_arch(struct feat_fd *ff, FILE *fp)
1626{
1627 fprintf(fp, "# arch : %s\n", ff->ph->env.arch);
1628}
1629
1630static void print_cpudesc(struct feat_fd *ff, FILE *fp)
1631{
1632 fprintf(fp, "# cpudesc : %s\n", ff->ph->env.cpu_desc);
1633}
1634
1635static void print_nrcpus(struct feat_fd *ff, FILE *fp)
1636{
1637 fprintf(fp, "# nrcpus online : %u\n", ff->ph->env.nr_cpus_online);
1638 fprintf(fp, "# nrcpus avail : %u\n", ff->ph->env.nr_cpus_avail);
1639}
1640
1641static void print_version(struct feat_fd *ff, FILE *fp)
1642{
1643 fprintf(fp, "# perf version : %s\n", ff->ph->env.version);
1644}
1645
1646static void print_cmdline(struct feat_fd *ff, FILE *fp)
1647{
1648 int nr, i;
1649
1650 nr = ff->ph->env.nr_cmdline;
1651
1652 fprintf(fp, "# cmdline : ");
1653
1654 for (i = 0; i < nr; i++) {
1655 char *argv_i = strdup(ff->ph->env.cmdline_argv[i]);
1656 if (!argv_i) {
1657 fprintf(fp, "%s ", ff->ph->env.cmdline_argv[i]);
1658 } else {
1659 char *mem = argv_i;
1660 do {
1661 char *quote = strchr(argv_i, '\'');
1662 if (!quote)
1663 break;
1664 *quote++ = '\0';
1665 fprintf(fp, "%s\\\'", argv_i);
1666 argv_i = quote;
1667 } while (1);
1668 fprintf(fp, "%s ", argv_i);
1669 free(mem);
1670 }
1671 }
1672 fputc('\n', fp);
1673}
1674
1675static void print_cpu_topology(struct feat_fd *ff, FILE *fp)
1676{
1677 struct perf_header *ph = ff->ph;
1678 int cpu_nr = ph->env.nr_cpus_avail;
1679 int nr, i;
1680 char *str;
1681
1682 nr = ph->env.nr_sibling_cores;
1683 str = ph->env.sibling_cores;
1684
1685 for (i = 0; i < nr; i++) {
1686 fprintf(fp, "# sibling sockets : %s\n", str);
1687 str += strlen(str) + 1;
1688 }
1689
1690 if (ph->env.nr_sibling_dies) {
1691 nr = ph->env.nr_sibling_dies;
1692 str = ph->env.sibling_dies;
1693
1694 for (i = 0; i < nr; i++) {
1695 fprintf(fp, "# sibling dies : %s\n", str);
1696 str += strlen(str) + 1;
1697 }
1698 }
1699
1700 nr = ph->env.nr_sibling_threads;
1701 str = ph->env.sibling_threads;
1702
1703 for (i = 0; i < nr; i++) {
1704 fprintf(fp, "# sibling threads : %s\n", str);
1705 str += strlen(str) + 1;
1706 }
1707
1708 if (ph->env.nr_sibling_dies) {
1709 if (ph->env.cpu != NULL) {
1710 for (i = 0; i < cpu_nr; i++)
1711 fprintf(fp, "# CPU %d: Core ID %d, "
1712 "Die ID %d, Socket ID %d\n",
1713 i, ph->env.cpu[i].core_id,
1714 ph->env.cpu[i].die_id,
1715 ph->env.cpu[i].socket_id);
1716 } else
1717 fprintf(fp, "# Core ID, Die ID and Socket ID "
1718 "information is not available\n");
1719 } else {
1720 if (ph->env.cpu != NULL) {
1721 for (i = 0; i < cpu_nr; i++)
1722 fprintf(fp, "# CPU %d: Core ID %d, "
1723 "Socket ID %d\n",
1724 i, ph->env.cpu[i].core_id,
1725 ph->env.cpu[i].socket_id);
1726 } else
1727 fprintf(fp, "# Core ID and Socket ID "
1728 "information is not available\n");
1729 }
1730}
1731
1732static void print_clockid(struct feat_fd *ff, FILE *fp)
1733{
1734 fprintf(fp, "# clockid frequency: %"PRIu64" MHz\n",
1735 ff->ph->env.clock.clockid_res_ns * 1000);
1736}
1737
1738static void print_clock_data(struct feat_fd *ff, FILE *fp)
1739{
1740 struct timespec clockid_ns;
1741 char tstr[64], date[64];
1742 struct timeval tod_ns;
1743 clockid_t clockid;
1744 struct tm ltime;
1745 u64 ref;
1746
1747 if (!ff->ph->env.clock.enabled) {
1748 fprintf(fp, "# reference time disabled\n");
1749 return;
1750 }
1751
1752 /* Compute TOD time. */
1753 ref = ff->ph->env.clock.tod_ns;
1754 tod_ns.tv_sec = ref / NSEC_PER_SEC;
1755 ref -= tod_ns.tv_sec * NSEC_PER_SEC;
1756 tod_ns.tv_usec = ref / NSEC_PER_USEC;
1757
1758 /* Compute clockid time. */
1759 ref = ff->ph->env.clock.clockid_ns;
1760 clockid_ns.tv_sec = ref / NSEC_PER_SEC;
1761 ref -= clockid_ns.tv_sec * NSEC_PER_SEC;
1762 clockid_ns.tv_nsec = ref;
1763
1764 clockid = ff->ph->env.clock.clockid;
1765
1766 if (localtime_r(&tod_ns.tv_sec, <ime) == NULL)
1767 snprintf(tstr, sizeof(tstr), "<error>");
1768 else {
1769 strftime(date, sizeof(date), "%F %T", <ime);
1770 scnprintf(tstr, sizeof(tstr), "%s.%06d",
1771 date, (int) tod_ns.tv_usec);
1772 }
1773
1774 fprintf(fp, "# clockid: %s (%u)\n", clockid_name(clockid), clockid);
1775 fprintf(fp, "# reference time: %s = %ld.%06d (TOD) = %ld.%09ld (%s)\n",
1776 tstr, (long) tod_ns.tv_sec, (int) tod_ns.tv_usec,
1777 (long) clockid_ns.tv_sec, clockid_ns.tv_nsec,
1778 clockid_name(clockid));
1779}
1780
1781static void print_hybrid_topology(struct feat_fd *ff, FILE *fp)
1782{
1783 int i;
1784 struct hybrid_node *n;
1785
1786 fprintf(fp, "# hybrid cpu system:\n");
1787 for (i = 0; i < ff->ph->env.nr_hybrid_nodes; i++) {
1788 n = &ff->ph->env.hybrid_nodes[i];
1789 fprintf(fp, "# %s cpu list : %s\n", n->pmu_name, n->cpus);
1790 }
1791}
1792
1793static void print_dir_format(struct feat_fd *ff, FILE *fp)
1794{
1795 struct perf_session *session;
1796 struct perf_data *data;
1797
1798 session = container_of(ff->ph, struct perf_session, header);
1799 data = session->data;
1800
1801 fprintf(fp, "# directory data version : %"PRIu64"\n", data->dir.version);
1802}
1803
1804#ifdef HAVE_LIBBPF_SUPPORT
1805static void print_bpf_prog_info(struct feat_fd *ff, FILE *fp)
1806{
1807 struct perf_env *env = &ff->ph->env;
1808 struct rb_root *root;
1809 struct rb_node *next;
1810
1811 down_read(&env->bpf_progs.lock);
1812
1813 root = &env->bpf_progs.infos;
1814 next = rb_first(root);
1815
1816 while (next) {
1817 struct bpf_prog_info_node *node;
1818
1819 node = rb_entry(next, struct bpf_prog_info_node, rb_node);
1820 next = rb_next(&node->rb_node);
1821
1822 __bpf_event__print_bpf_prog_info(&node->info_linear->info,
1823 env, fp);
1824 }
1825
1826 up_read(&env->bpf_progs.lock);
1827}
1828
1829static void print_bpf_btf(struct feat_fd *ff, FILE *fp)
1830{
1831 struct perf_env *env = &ff->ph->env;
1832 struct rb_root *root;
1833 struct rb_node *next;
1834
1835 down_read(&env->bpf_progs.lock);
1836
1837 root = &env->bpf_progs.btfs;
1838 next = rb_first(root);
1839
1840 while (next) {
1841 struct btf_node *node;
1842
1843 node = rb_entry(next, struct btf_node, rb_node);
1844 next = rb_next(&node->rb_node);
1845 fprintf(fp, "# btf info of id %u\n", node->id);
1846 }
1847
1848 up_read(&env->bpf_progs.lock);
1849}
1850#endif // HAVE_LIBBPF_SUPPORT
1851
1852static void free_event_desc(struct evsel *events)
1853{
1854 struct evsel *evsel;
1855
1856 if (!events)
1857 return;
1858
1859 for (evsel = events; evsel->core.attr.size; evsel++) {
1860 zfree(&evsel->name);
1861 zfree(&evsel->core.id);
1862 }
1863
1864 free(events);
1865}
1866
1867static bool perf_attr_check(struct perf_event_attr *attr)
1868{
1869 if (attr->__reserved_1 || attr->__reserved_2 || attr->__reserved_3) {
1870 pr_warning("Reserved bits are set unexpectedly. "
1871 "Please update perf tool.\n");
1872 return false;
1873 }
1874
1875 if (attr->sample_type & ~(PERF_SAMPLE_MAX-1)) {
1876 pr_warning("Unknown sample type (0x%llx) is detected. "
1877 "Please update perf tool.\n",
1878 attr->sample_type);
1879 return false;
1880 }
1881
1882 if (attr->read_format & ~(PERF_FORMAT_MAX-1)) {
1883 pr_warning("Unknown read format (0x%llx) is detected. "
1884 "Please update perf tool.\n",
1885 attr->read_format);
1886 return false;
1887 }
1888
1889 if ((attr->sample_type & PERF_SAMPLE_BRANCH_STACK) &&
1890 (attr->branch_sample_type & ~(PERF_SAMPLE_BRANCH_MAX-1))) {
1891 pr_warning("Unknown branch sample type (0x%llx) is detected. "
1892 "Please update perf tool.\n",
1893 attr->branch_sample_type);
1894
1895 return false;
1896 }
1897
1898 return true;
1899}
1900
1901static struct evsel *read_event_desc(struct feat_fd *ff)
1902{
1903 struct evsel *evsel, *events = NULL;
1904 u64 *id;
1905 void *buf = NULL;
1906 u32 nre, sz, nr, i, j;
1907 size_t msz;
1908
1909 /* number of events */
1910 if (do_read_u32(ff, &nre))
1911 goto error;
1912
1913 if (do_read_u32(ff, &sz))
1914 goto error;
1915
1916 /* buffer to hold on file attr struct */
1917 buf = malloc(sz);
1918 if (!buf)
1919 goto error;
1920
1921 /* the last event terminates with evsel->core.attr.size == 0: */
1922 events = calloc(nre + 1, sizeof(*events));
1923 if (!events)
1924 goto error;
1925
1926 msz = sizeof(evsel->core.attr);
1927 if (sz < msz)
1928 msz = sz;
1929
1930 for (i = 0, evsel = events; i < nre; evsel++, i++) {
1931 evsel->core.idx = i;
1932
1933 /*
1934 * must read entire on-file attr struct to
1935 * sync up with layout.
1936 */
1937 if (__do_read(ff, buf, sz))
1938 goto error;
1939
1940 if (ff->ph->needs_swap)
1941 perf_event__attr_swap(buf);
1942
1943 memcpy(&evsel->core.attr, buf, msz);
1944
1945 if (!perf_attr_check(&evsel->core.attr))
1946 goto error;
1947
1948 if (do_read_u32(ff, &nr))
1949 goto error;
1950
1951 if (ff->ph->needs_swap)
1952 evsel->needs_swap = true;
1953
1954 evsel->name = do_read_string(ff);
1955 if (!evsel->name)
1956 goto error;
1957
1958 if (!nr)
1959 continue;
1960
1961 id = calloc(nr, sizeof(*id));
1962 if (!id)
1963 goto error;
1964 evsel->core.ids = nr;
1965 evsel->core.id = id;
1966
1967 for (j = 0 ; j < nr; j++) {
1968 if (do_read_u64(ff, id))
1969 goto error;
1970 id++;
1971 }
1972 }
1973out:
1974 free(buf);
1975 return events;
1976error:
1977 free_event_desc(events);
1978 events = NULL;
1979 goto out;
1980}
1981
1982static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val,
1983 void *priv __maybe_unused)
1984{
1985 return fprintf(fp, ", %s = %s", name, val);
1986}
1987
1988static void print_event_desc(struct feat_fd *ff, FILE *fp)
1989{
1990 struct evsel *evsel, *events;
1991 u32 j;
1992 u64 *id;
1993
1994 if (ff->events)
1995 events = ff->events;
1996 else
1997 events = read_event_desc(ff);
1998
1999 if (!events) {
2000 fprintf(fp, "# event desc: not available or unable to read\n");
2001 return;
2002 }
2003
2004 for (evsel = events; evsel->core.attr.size; evsel++) {
2005 fprintf(fp, "# event : name = %s, ", evsel->name);
2006
2007 if (evsel->core.ids) {
2008 fprintf(fp, ", id = {");
2009 for (j = 0, id = evsel->core.id; j < evsel->core.ids; j++, id++) {
2010 if (j)
2011 fputc(',', fp);
2012 fprintf(fp, " %"PRIu64, *id);
2013 }
2014 fprintf(fp, " }");
2015 }
2016
2017 perf_event_attr__fprintf(fp, &evsel->core.attr, __desc_attr__fprintf, NULL);
2018
2019 fputc('\n', fp);
2020 }
2021
2022 free_event_desc(events);
2023 ff->events = NULL;
2024}
2025
2026static void print_total_mem(struct feat_fd *ff, FILE *fp)
2027{
2028 fprintf(fp, "# total memory : %llu kB\n", ff->ph->env.total_mem);
2029}
2030
2031static void print_numa_topology(struct feat_fd *ff, FILE *fp)
2032{
2033 int i;
2034 struct numa_node *n;
2035
2036 for (i = 0; i < ff->ph->env.nr_numa_nodes; i++) {
2037 n = &ff->ph->env.numa_nodes[i];
2038
2039 fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB,"
2040 " free = %"PRIu64" kB\n",
2041 n->node, n->mem_total, n->mem_free);
2042
2043 fprintf(fp, "# node%u cpu list : ", n->node);
2044 cpu_map__fprintf(n->map, fp);
2045 }
2046}
2047
2048static void print_cpuid(struct feat_fd *ff, FILE *fp)
2049{
2050 fprintf(fp, "# cpuid : %s\n", ff->ph->env.cpuid);
2051}
2052
2053static void print_branch_stack(struct feat_fd *ff __maybe_unused, FILE *fp)
2054{
2055 fprintf(fp, "# contains samples with branch stack\n");
2056}
2057
2058static void print_auxtrace(struct feat_fd *ff __maybe_unused, FILE *fp)
2059{
2060 fprintf(fp, "# contains AUX area data (e.g. instruction trace)\n");
2061}
2062
2063static void print_stat(struct feat_fd *ff __maybe_unused, FILE *fp)
2064{
2065 fprintf(fp, "# contains stat data\n");
2066}
2067
2068static void print_cache(struct feat_fd *ff, FILE *fp __maybe_unused)
2069{
2070 int i;
2071
2072 fprintf(fp, "# CPU cache info:\n");
2073 for (i = 0; i < ff->ph->env.caches_cnt; i++) {
2074 fprintf(fp, "# ");
2075 cpu_cache_level__fprintf(fp, &ff->ph->env.caches[i]);
2076 }
2077}
2078
2079static void print_compressed(struct feat_fd *ff, FILE *fp)
2080{
2081 fprintf(fp, "# compressed : %s, level = %d, ratio = %d\n",
2082 ff->ph->env.comp_type == PERF_COMP_ZSTD ? "Zstd" : "Unknown",
2083 ff->ph->env.comp_level, ff->ph->env.comp_ratio);
2084}
2085
2086static void __print_pmu_caps(FILE *fp, int nr_caps, char **caps, char *pmu_name)
2087{
2088 const char *delimiter = "";
2089 int i;
2090
2091 if (!nr_caps) {
2092 fprintf(fp, "# %s pmu capabilities: not available\n", pmu_name);
2093 return;
2094 }
2095
2096 fprintf(fp, "# %s pmu capabilities: ", pmu_name);
2097 for (i = 0; i < nr_caps; i++) {
2098 fprintf(fp, "%s%s", delimiter, caps[i]);
2099 delimiter = ", ";
2100 }
2101
2102 fprintf(fp, "\n");
2103}
2104
2105static void print_cpu_pmu_caps(struct feat_fd *ff, FILE *fp)
2106{
2107 __print_pmu_caps(fp, ff->ph->env.nr_cpu_pmu_caps,
2108 ff->ph->env.cpu_pmu_caps, (char *)"cpu");
2109}
2110
2111static void print_pmu_caps(struct feat_fd *ff, FILE *fp)
2112{
2113 struct pmu_caps *pmu_caps;
2114
2115 for (int i = 0; i < ff->ph->env.nr_pmus_with_caps; i++) {
2116 pmu_caps = &ff->ph->env.pmu_caps[i];
2117 __print_pmu_caps(fp, pmu_caps->nr_caps, pmu_caps->caps,
2118 pmu_caps->pmu_name);
2119 }
2120
2121 if (strcmp(perf_env__arch(&ff->ph->env), "x86") == 0 &&
2122 perf_env__has_pmu_mapping(&ff->ph->env, "ibs_op")) {
2123 char *max_precise = perf_env__find_pmu_cap(&ff->ph->env, "cpu", "max_precise");
2124
2125 if (max_precise != NULL && atoi(max_precise) == 0)
2126 fprintf(fp, "# AMD systems uses ibs_op// PMU for some precise events, e.g.: cycles:p, see the 'perf list' man page for further details.\n");
2127 }
2128}
2129
2130static void print_pmu_mappings(struct feat_fd *ff, FILE *fp)
2131{
2132 const char *delimiter = "# pmu mappings: ";
2133 char *str, *tmp;
2134 u32 pmu_num;
2135 u32 type;
2136
2137 pmu_num = ff->ph->env.nr_pmu_mappings;
2138 if (!pmu_num) {
2139 fprintf(fp, "# pmu mappings: not available\n");
2140 return;
2141 }
2142
2143 str = ff->ph->env.pmu_mappings;
2144
2145 while (pmu_num) {
2146 type = strtoul(str, &tmp, 0);
2147 if (*tmp != ':')
2148 goto error;
2149
2150 str = tmp + 1;
2151 fprintf(fp, "%s%s = %" PRIu32, delimiter, str, type);
2152
2153 delimiter = ", ";
2154 str += strlen(str) + 1;
2155 pmu_num--;
2156 }
2157
2158 fprintf(fp, "\n");
2159
2160 if (!pmu_num)
2161 return;
2162error:
2163 fprintf(fp, "# pmu mappings: unable to read\n");
2164}
2165
2166static void print_group_desc(struct feat_fd *ff, FILE *fp)
2167{
2168 struct perf_session *session;
2169 struct evsel *evsel;
2170 u32 nr = 0;
2171
2172 session = container_of(ff->ph, struct perf_session, header);
2173
2174 evlist__for_each_entry(session->evlist, evsel) {
2175 if (evsel__is_group_leader(evsel) && evsel->core.nr_members > 1) {
2176 fprintf(fp, "# group: %s{%s", evsel->group_name ?: "", evsel__name(evsel));
2177
2178 nr = evsel->core.nr_members - 1;
2179 } else if (nr) {
2180 fprintf(fp, ",%s", evsel__name(evsel));
2181
2182 if (--nr == 0)
2183 fprintf(fp, "}\n");
2184 }
2185 }
2186}
2187
2188static void print_sample_time(struct feat_fd *ff, FILE *fp)
2189{
2190 struct perf_session *session;
2191 char time_buf[32];
2192 double d;
2193
2194 session = container_of(ff->ph, struct perf_session, header);
2195
2196 timestamp__scnprintf_usec(session->evlist->first_sample_time,
2197 time_buf, sizeof(time_buf));
2198 fprintf(fp, "# time of first sample : %s\n", time_buf);
2199
2200 timestamp__scnprintf_usec(session->evlist->last_sample_time,
2201 time_buf, sizeof(time_buf));
2202 fprintf(fp, "# time of last sample : %s\n", time_buf);
2203
2204 d = (double)(session->evlist->last_sample_time -
2205 session->evlist->first_sample_time) / NSEC_PER_MSEC;
2206
2207 fprintf(fp, "# sample duration : %10.3f ms\n", d);
2208}
2209
2210static void memory_node__fprintf(struct memory_node *n,
2211 unsigned long long bsize, FILE *fp)
2212{
2213 char buf_map[100], buf_size[50];
2214 unsigned long long size;
2215
2216 size = bsize * bitmap_weight(n->set, n->size);
2217 unit_number__scnprintf(buf_size, 50, size);
2218
2219 bitmap_scnprintf(n->set, n->size, buf_map, 100);
2220 fprintf(fp, "# %3" PRIu64 " [%s]: %s\n", n->node, buf_size, buf_map);
2221}
2222
2223static void print_mem_topology(struct feat_fd *ff, FILE *fp)
2224{
2225 struct memory_node *nodes;
2226 int i, nr;
2227
2228 nodes = ff->ph->env.memory_nodes;
2229 nr = ff->ph->env.nr_memory_nodes;
2230
2231 fprintf(fp, "# memory nodes (nr %d, block size 0x%llx):\n",
2232 nr, ff->ph->env.memory_bsize);
2233
2234 for (i = 0; i < nr; i++) {
2235 memory_node__fprintf(&nodes[i], ff->ph->env.memory_bsize, fp);
2236 }
2237}
2238
2239static int __event_process_build_id(struct perf_record_header_build_id *bev,
2240 char *filename,
2241 struct perf_session *session)
2242{
2243 int err = -1;
2244 struct machine *machine;
2245 u16 cpumode;
2246 struct dso *dso;
2247 enum dso_space_type dso_space;
2248
2249 machine = perf_session__findnew_machine(session, bev->pid);
2250 if (!machine)
2251 goto out;
2252
2253 cpumode = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
2254
2255 switch (cpumode) {
2256 case PERF_RECORD_MISC_KERNEL:
2257 dso_space = DSO_SPACE__KERNEL;
2258 break;
2259 case PERF_RECORD_MISC_GUEST_KERNEL:
2260 dso_space = DSO_SPACE__KERNEL_GUEST;
2261 break;
2262 case PERF_RECORD_MISC_USER:
2263 case PERF_RECORD_MISC_GUEST_USER:
2264 dso_space = DSO_SPACE__USER;
2265 break;
2266 default:
2267 goto out;
2268 }
2269
2270 dso = machine__findnew_dso(machine, filename);
2271 if (dso != NULL) {
2272 char sbuild_id[SBUILD_ID_SIZE];
2273 struct build_id bid;
2274 size_t size = BUILD_ID_SIZE;
2275
2276 if (bev->header.misc & PERF_RECORD_MISC_BUILD_ID_SIZE)
2277 size = bev->size;
2278
2279 build_id__init(&bid, bev->data, size);
2280 dso__set_build_id(dso, &bid);
2281 dso__set_header_build_id(dso, true);
2282
2283 if (dso_space != DSO_SPACE__USER) {
2284 struct kmod_path m = { .name = NULL, };
2285
2286 if (!kmod_path__parse_name(&m, filename) && m.kmod)
2287 dso__set_module_info(dso, &m, machine);
2288
2289 dso__set_kernel(dso, dso_space);
2290 free(m.name);
2291 }
2292
2293 build_id__sprintf(dso__bid(dso), sbuild_id);
2294 pr_debug("build id event received for %s: %s [%zu]\n",
2295 dso__long_name(dso), sbuild_id, size);
2296 dso__put(dso);
2297 }
2298
2299 err = 0;
2300out:
2301 return err;
2302}
2303
2304static int perf_header__read_build_ids_abi_quirk(struct perf_header *header,
2305 int input, u64 offset, u64 size)
2306{
2307 struct perf_session *session = container_of(header, struct perf_session, header);
2308 struct {
2309 struct perf_event_header header;
2310 u8 build_id[PERF_ALIGN(BUILD_ID_SIZE, sizeof(u64))];
2311 char filename[0];
2312 } old_bev;
2313 struct perf_record_header_build_id bev;
2314 char filename[PATH_MAX];
2315 u64 limit = offset + size;
2316
2317 while (offset < limit) {
2318 ssize_t len;
2319
2320 if (readn(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev))
2321 return -1;
2322
2323 if (header->needs_swap)
2324 perf_event_header__bswap(&old_bev.header);
2325
2326 len = old_bev.header.size - sizeof(old_bev);
2327 if (readn(input, filename, len) != len)
2328 return -1;
2329
2330 bev.header = old_bev.header;
2331
2332 /*
2333 * As the pid is the missing value, we need to fill
2334 * it properly. The header.misc value give us nice hint.
2335 */
2336 bev.pid = HOST_KERNEL_ID;
2337 if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER ||
2338 bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL)
2339 bev.pid = DEFAULT_GUEST_KERNEL_ID;
2340
2341 memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id));
2342 __event_process_build_id(&bev, filename, session);
2343
2344 offset += bev.header.size;
2345 }
2346
2347 return 0;
2348}
2349
2350static int perf_header__read_build_ids(struct perf_header *header,
2351 int input, u64 offset, u64 size)
2352{
2353 struct perf_session *session = container_of(header, struct perf_session, header);
2354 struct perf_record_header_build_id bev;
2355 char filename[PATH_MAX];
2356 u64 limit = offset + size, orig_offset = offset;
2357 int err = -1;
2358
2359 while (offset < limit) {
2360 ssize_t len;
2361
2362 if (readn(input, &bev, sizeof(bev)) != sizeof(bev))
2363 goto out;
2364
2365 if (header->needs_swap)
2366 perf_event_header__bswap(&bev.header);
2367
2368 len = bev.header.size - sizeof(bev);
2369 if (readn(input, filename, len) != len)
2370 goto out;
2371 /*
2372 * The a1645ce1 changeset:
2373 *
2374 * "perf: 'perf kvm' tool for monitoring guest performance from host"
2375 *
2376 * Added a field to struct perf_record_header_build_id that broke the file
2377 * format.
2378 *
2379 * Since the kernel build-id is the first entry, process the
2380 * table using the old format if the well known
2381 * '[kernel.kallsyms]' string for the kernel build-id has the
2382 * first 4 characters chopped off (where the pid_t sits).
2383 */
2384 if (memcmp(filename, "nel.kallsyms]", 13) == 0) {
2385 if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1)
2386 return -1;
2387 return perf_header__read_build_ids_abi_quirk(header, input, offset, size);
2388 }
2389
2390 __event_process_build_id(&bev, filename, session);
2391
2392 offset += bev.header.size;
2393 }
2394 err = 0;
2395out:
2396 return err;
2397}
2398
2399/* Macro for features that simply need to read and store a string. */
2400#define FEAT_PROCESS_STR_FUN(__feat, __feat_env) \
2401static int process_##__feat(struct feat_fd *ff, void *data __maybe_unused) \
2402{\
2403 free(ff->ph->env.__feat_env); \
2404 ff->ph->env.__feat_env = do_read_string(ff); \
2405 return ff->ph->env.__feat_env ? 0 : -ENOMEM; \
2406}
2407
2408FEAT_PROCESS_STR_FUN(hostname, hostname);
2409FEAT_PROCESS_STR_FUN(osrelease, os_release);
2410FEAT_PROCESS_STR_FUN(version, version);
2411FEAT_PROCESS_STR_FUN(arch, arch);
2412FEAT_PROCESS_STR_FUN(cpudesc, cpu_desc);
2413FEAT_PROCESS_STR_FUN(cpuid, cpuid);
2414
2415#ifdef HAVE_LIBTRACEEVENT
2416static int process_tracing_data(struct feat_fd *ff, void *data)
2417{
2418 ssize_t ret = trace_report(ff->fd, data, false);
2419
2420 return ret < 0 ? -1 : 0;
2421}
2422#endif
2423
2424static int process_build_id(struct feat_fd *ff, void *data __maybe_unused)
2425{
2426 if (perf_header__read_build_ids(ff->ph, ff->fd, ff->offset, ff->size))
2427 pr_debug("Failed to read buildids, continuing...\n");
2428 return 0;
2429}
2430
2431static int process_nrcpus(struct feat_fd *ff, void *data __maybe_unused)
2432{
2433 int ret;
2434 u32 nr_cpus_avail, nr_cpus_online;
2435
2436 ret = do_read_u32(ff, &nr_cpus_avail);
2437 if (ret)
2438 return ret;
2439
2440 ret = do_read_u32(ff, &nr_cpus_online);
2441 if (ret)
2442 return ret;
2443 ff->ph->env.nr_cpus_avail = (int)nr_cpus_avail;
2444 ff->ph->env.nr_cpus_online = (int)nr_cpus_online;
2445 return 0;
2446}
2447
2448static int process_total_mem(struct feat_fd *ff, void *data __maybe_unused)
2449{
2450 u64 total_mem;
2451 int ret;
2452
2453 ret = do_read_u64(ff, &total_mem);
2454 if (ret)
2455 return -1;
2456 ff->ph->env.total_mem = (unsigned long long)total_mem;
2457 return 0;
2458}
2459
2460static struct evsel *evlist__find_by_index(struct evlist *evlist, int idx)
2461{
2462 struct evsel *evsel;
2463
2464 evlist__for_each_entry(evlist, evsel) {
2465 if (evsel->core.idx == idx)
2466 return evsel;
2467 }
2468
2469 return NULL;
2470}
2471
2472static void evlist__set_event_name(struct evlist *evlist, struct evsel *event)
2473{
2474 struct evsel *evsel;
2475
2476 if (!event->name)
2477 return;
2478
2479 evsel = evlist__find_by_index(evlist, event->core.idx);
2480 if (!evsel)
2481 return;
2482
2483 if (evsel->name)
2484 return;
2485
2486 evsel->name = strdup(event->name);
2487}
2488
2489static int
2490process_event_desc(struct feat_fd *ff, void *data __maybe_unused)
2491{
2492 struct perf_session *session;
2493 struct evsel *evsel, *events = read_event_desc(ff);
2494
2495 if (!events)
2496 return 0;
2497
2498 session = container_of(ff->ph, struct perf_session, header);
2499
2500 if (session->data->is_pipe) {
2501 /* Save events for reading later by print_event_desc,
2502 * since they can't be read again in pipe mode. */
2503 ff->events = events;
2504 }
2505
2506 for (evsel = events; evsel->core.attr.size; evsel++)
2507 evlist__set_event_name(session->evlist, evsel);
2508
2509 if (!session->data->is_pipe)
2510 free_event_desc(events);
2511
2512 return 0;
2513}
2514
2515static int process_cmdline(struct feat_fd *ff, void *data __maybe_unused)
2516{
2517 char *str, *cmdline = NULL, **argv = NULL;
2518 u32 nr, i, len = 0;
2519
2520 if (do_read_u32(ff, &nr))
2521 return -1;
2522
2523 ff->ph->env.nr_cmdline = nr;
2524
2525 cmdline = zalloc(ff->size + nr + 1);
2526 if (!cmdline)
2527 return -1;
2528
2529 argv = zalloc(sizeof(char *) * (nr + 1));
2530 if (!argv)
2531 goto error;
2532
2533 for (i = 0; i < nr; i++) {
2534 str = do_read_string(ff);
2535 if (!str)
2536 goto error;
2537
2538 argv[i] = cmdline + len;
2539 memcpy(argv[i], str, strlen(str) + 1);
2540 len += strlen(str) + 1;
2541 free(str);
2542 }
2543 ff->ph->env.cmdline = cmdline;
2544 ff->ph->env.cmdline_argv = (const char **) argv;
2545 return 0;
2546
2547error:
2548 free(argv);
2549 free(cmdline);
2550 return -1;
2551}
2552
2553static int process_cpu_topology(struct feat_fd *ff, void *data __maybe_unused)
2554{
2555 u32 nr, i;
2556 char *str = NULL;
2557 struct strbuf sb;
2558 int cpu_nr = ff->ph->env.nr_cpus_avail;
2559 u64 size = 0;
2560 struct perf_header *ph = ff->ph;
2561 bool do_core_id_test = true;
2562
2563 ph->env.cpu = calloc(cpu_nr, sizeof(*ph->env.cpu));
2564 if (!ph->env.cpu)
2565 return -1;
2566
2567 if (do_read_u32(ff, &nr))
2568 goto free_cpu;
2569
2570 ph->env.nr_sibling_cores = nr;
2571 size += sizeof(u32);
2572 if (strbuf_init(&sb, 128) < 0)
2573 goto free_cpu;
2574
2575 for (i = 0; i < nr; i++) {
2576 str = do_read_string(ff);
2577 if (!str)
2578 goto error;
2579
2580 /* include a NULL character at the end */
2581 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
2582 goto error;
2583 size += string_size(str);
2584 zfree(&str);
2585 }
2586 ph->env.sibling_cores = strbuf_detach(&sb, NULL);
2587
2588 if (do_read_u32(ff, &nr))
2589 return -1;
2590
2591 ph->env.nr_sibling_threads = nr;
2592 size += sizeof(u32);
2593
2594 for (i = 0; i < nr; i++) {
2595 str = do_read_string(ff);
2596 if (!str)
2597 goto error;
2598
2599 /* include a NULL character at the end */
2600 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
2601 goto error;
2602 size += string_size(str);
2603 zfree(&str);
2604 }
2605 ph->env.sibling_threads = strbuf_detach(&sb, NULL);
2606
2607 /*
2608 * The header may be from old perf,
2609 * which doesn't include core id and socket id information.
2610 */
2611 if (ff->size <= size) {
2612 zfree(&ph->env.cpu);
2613 return 0;
2614 }
2615
2616 /* On s390 the socket_id number is not related to the numbers of cpus.
2617 * The socket_id number might be higher than the numbers of cpus.
2618 * This depends on the configuration.
2619 * AArch64 is the same.
2620 */
2621 if (ph->env.arch && (!strncmp(ph->env.arch, "s390", 4)
2622 || !strncmp(ph->env.arch, "aarch64", 7)))
2623 do_core_id_test = false;
2624
2625 for (i = 0; i < (u32)cpu_nr; i++) {
2626 if (do_read_u32(ff, &nr))
2627 goto free_cpu;
2628
2629 ph->env.cpu[i].core_id = nr;
2630 size += sizeof(u32);
2631
2632 if (do_read_u32(ff, &nr))
2633 goto free_cpu;
2634
2635 if (do_core_id_test && nr != (u32)-1 && nr > (u32)cpu_nr) {
2636 pr_debug("socket_id number is too big."
2637 "You may need to upgrade the perf tool.\n");
2638 goto free_cpu;
2639 }
2640
2641 ph->env.cpu[i].socket_id = nr;
2642 size += sizeof(u32);
2643 }
2644
2645 /*
2646 * The header may be from old perf,
2647 * which doesn't include die information.
2648 */
2649 if (ff->size <= size)
2650 return 0;
2651
2652 if (do_read_u32(ff, &nr))
2653 return -1;
2654
2655 ph->env.nr_sibling_dies = nr;
2656 size += sizeof(u32);
2657
2658 for (i = 0; i < nr; i++) {
2659 str = do_read_string(ff);
2660 if (!str)
2661 goto error;
2662
2663 /* include a NULL character at the end */
2664 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
2665 goto error;
2666 size += string_size(str);
2667 zfree(&str);
2668 }
2669 ph->env.sibling_dies = strbuf_detach(&sb, NULL);
2670
2671 for (i = 0; i < (u32)cpu_nr; i++) {
2672 if (do_read_u32(ff, &nr))
2673 goto free_cpu;
2674
2675 ph->env.cpu[i].die_id = nr;
2676 }
2677
2678 return 0;
2679
2680error:
2681 strbuf_release(&sb);
2682 zfree(&str);
2683free_cpu:
2684 zfree(&ph->env.cpu);
2685 return -1;
2686}
2687
2688static int process_numa_topology(struct feat_fd *ff, void *data __maybe_unused)
2689{
2690 struct numa_node *nodes, *n;
2691 u32 nr, i;
2692 char *str;
2693
2694 /* nr nodes */
2695 if (do_read_u32(ff, &nr))
2696 return -1;
2697
2698 nodes = zalloc(sizeof(*nodes) * nr);
2699 if (!nodes)
2700 return -ENOMEM;
2701
2702 for (i = 0; i < nr; i++) {
2703 n = &nodes[i];
2704
2705 /* node number */
2706 if (do_read_u32(ff, &n->node))
2707 goto error;
2708
2709 if (do_read_u64(ff, &n->mem_total))
2710 goto error;
2711
2712 if (do_read_u64(ff, &n->mem_free))
2713 goto error;
2714
2715 str = do_read_string(ff);
2716 if (!str)
2717 goto error;
2718
2719 n->map = perf_cpu_map__new(str);
2720 free(str);
2721 if (!n->map)
2722 goto error;
2723 }
2724 ff->ph->env.nr_numa_nodes = nr;
2725 ff->ph->env.numa_nodes = nodes;
2726 return 0;
2727
2728error:
2729 free(nodes);
2730 return -1;
2731}
2732
2733static int process_pmu_mappings(struct feat_fd *ff, void *data __maybe_unused)
2734{
2735 char *name;
2736 u32 pmu_num;
2737 u32 type;
2738 struct strbuf sb;
2739
2740 if (do_read_u32(ff, &pmu_num))
2741 return -1;
2742
2743 if (!pmu_num) {
2744 pr_debug("pmu mappings not available\n");
2745 return 0;
2746 }
2747
2748 ff->ph->env.nr_pmu_mappings = pmu_num;
2749 if (strbuf_init(&sb, 128) < 0)
2750 return -1;
2751
2752 while (pmu_num) {
2753 if (do_read_u32(ff, &type))
2754 goto error;
2755
2756 name = do_read_string(ff);
2757 if (!name)
2758 goto error;
2759
2760 if (strbuf_addf(&sb, "%u:%s", type, name) < 0)
2761 goto error;
2762 /* include a NULL character at the end */
2763 if (strbuf_add(&sb, "", 1) < 0)
2764 goto error;
2765
2766 if (!strcmp(name, "msr"))
2767 ff->ph->env.msr_pmu_type = type;
2768
2769 free(name);
2770 pmu_num--;
2771 }
2772 ff->ph->env.pmu_mappings = strbuf_detach(&sb, NULL);
2773 return 0;
2774
2775error:
2776 strbuf_release(&sb);
2777 return -1;
2778}
2779
2780static int process_group_desc(struct feat_fd *ff, void *data __maybe_unused)
2781{
2782 size_t ret = -1;
2783 u32 i, nr, nr_groups;
2784 struct perf_session *session;
2785 struct evsel *evsel, *leader = NULL;
2786 struct group_desc {
2787 char *name;
2788 u32 leader_idx;
2789 u32 nr_members;
2790 } *desc;
2791
2792 if (do_read_u32(ff, &nr_groups))
2793 return -1;
2794
2795 ff->ph->env.nr_groups = nr_groups;
2796 if (!nr_groups) {
2797 pr_debug("group desc not available\n");
2798 return 0;
2799 }
2800
2801 desc = calloc(nr_groups, sizeof(*desc));
2802 if (!desc)
2803 return -1;
2804
2805 for (i = 0; i < nr_groups; i++) {
2806 desc[i].name = do_read_string(ff);
2807 if (!desc[i].name)
2808 goto out_free;
2809
2810 if (do_read_u32(ff, &desc[i].leader_idx))
2811 goto out_free;
2812
2813 if (do_read_u32(ff, &desc[i].nr_members))
2814 goto out_free;
2815 }
2816
2817 /*
2818 * Rebuild group relationship based on the group_desc
2819 */
2820 session = container_of(ff->ph, struct perf_session, header);
2821
2822 i = nr = 0;
2823 evlist__for_each_entry(session->evlist, evsel) {
2824 if (i < nr_groups && evsel->core.idx == (int) desc[i].leader_idx) {
2825 evsel__set_leader(evsel, evsel);
2826 /* {anon_group} is a dummy name */
2827 if (strcmp(desc[i].name, "{anon_group}")) {
2828 evsel->group_name = desc[i].name;
2829 desc[i].name = NULL;
2830 }
2831 evsel->core.nr_members = desc[i].nr_members;
2832
2833 if (i >= nr_groups || nr > 0) {
2834 pr_debug("invalid group desc\n");
2835 goto out_free;
2836 }
2837
2838 leader = evsel;
2839 nr = evsel->core.nr_members - 1;
2840 i++;
2841 } else if (nr) {
2842 /* This is a group member */
2843 evsel__set_leader(evsel, leader);
2844
2845 nr--;
2846 }
2847 }
2848
2849 if (i != nr_groups || nr != 0) {
2850 pr_debug("invalid group desc\n");
2851 goto out_free;
2852 }
2853
2854 ret = 0;
2855out_free:
2856 for (i = 0; i < nr_groups; i++)
2857 zfree(&desc[i].name);
2858 free(desc);
2859
2860 return ret;
2861}
2862
2863static int process_auxtrace(struct feat_fd *ff, void *data __maybe_unused)
2864{
2865 struct perf_session *session;
2866 int err;
2867
2868 session = container_of(ff->ph, struct perf_session, header);
2869
2870 err = auxtrace_index__process(ff->fd, ff->size, session,
2871 ff->ph->needs_swap);
2872 if (err < 0)
2873 pr_err("Failed to process auxtrace index\n");
2874 return err;
2875}
2876
2877static int process_cache(struct feat_fd *ff, void *data __maybe_unused)
2878{
2879 struct cpu_cache_level *caches;
2880 u32 cnt, i, version;
2881
2882 if (do_read_u32(ff, &version))
2883 return -1;
2884
2885 if (version != 1)
2886 return -1;
2887
2888 if (do_read_u32(ff, &cnt))
2889 return -1;
2890
2891 caches = zalloc(sizeof(*caches) * cnt);
2892 if (!caches)
2893 return -1;
2894
2895 for (i = 0; i < cnt; i++) {
2896 struct cpu_cache_level *c = &caches[i];
2897
2898 #define _R(v) \
2899 if (do_read_u32(ff, &c->v)) \
2900 goto out_free_caches; \
2901
2902 _R(level)
2903 _R(line_size)
2904 _R(sets)
2905 _R(ways)
2906 #undef _R
2907
2908 #define _R(v) \
2909 c->v = do_read_string(ff); \
2910 if (!c->v) \
2911 goto out_free_caches; \
2912
2913 _R(type)
2914 _R(size)
2915 _R(map)
2916 #undef _R
2917 }
2918
2919 ff->ph->env.caches = caches;
2920 ff->ph->env.caches_cnt = cnt;
2921 return 0;
2922out_free_caches:
2923 for (i = 0; i < cnt; i++) {
2924 free(caches[i].type);
2925 free(caches[i].size);
2926 free(caches[i].map);
2927 }
2928 free(caches);
2929 return -1;
2930}
2931
2932static int process_sample_time(struct feat_fd *ff, void *data __maybe_unused)
2933{
2934 struct perf_session *session;
2935 u64 first_sample_time, last_sample_time;
2936 int ret;
2937
2938 session = container_of(ff->ph, struct perf_session, header);
2939
2940 ret = do_read_u64(ff, &first_sample_time);
2941 if (ret)
2942 return -1;
2943
2944 ret = do_read_u64(ff, &last_sample_time);
2945 if (ret)
2946 return -1;
2947
2948 session->evlist->first_sample_time = first_sample_time;
2949 session->evlist->last_sample_time = last_sample_time;
2950 return 0;
2951}
2952
2953static int process_mem_topology(struct feat_fd *ff,
2954 void *data __maybe_unused)
2955{
2956 struct memory_node *nodes;
2957 u64 version, i, nr, bsize;
2958 int ret = -1;
2959
2960 if (do_read_u64(ff, &version))
2961 return -1;
2962
2963 if (version != 1)
2964 return -1;
2965
2966 if (do_read_u64(ff, &bsize))
2967 return -1;
2968
2969 if (do_read_u64(ff, &nr))
2970 return -1;
2971
2972 nodes = zalloc(sizeof(*nodes) * nr);
2973 if (!nodes)
2974 return -1;
2975
2976 for (i = 0; i < nr; i++) {
2977 struct memory_node n;
2978
2979 #define _R(v) \
2980 if (do_read_u64(ff, &n.v)) \
2981 goto out; \
2982
2983 _R(node)
2984 _R(size)
2985
2986 #undef _R
2987
2988 if (do_read_bitmap(ff, &n.set, &n.size))
2989 goto out;
2990
2991 nodes[i] = n;
2992 }
2993
2994 ff->ph->env.memory_bsize = bsize;
2995 ff->ph->env.memory_nodes = nodes;
2996 ff->ph->env.nr_memory_nodes = nr;
2997 ret = 0;
2998
2999out:
3000 if (ret)
3001 free(nodes);
3002 return ret;
3003}
3004
3005static int process_clockid(struct feat_fd *ff,
3006 void *data __maybe_unused)
3007{
3008 if (do_read_u64(ff, &ff->ph->env.clock.clockid_res_ns))
3009 return -1;
3010
3011 return 0;
3012}
3013
3014static int process_clock_data(struct feat_fd *ff,
3015 void *_data __maybe_unused)
3016{
3017 u32 data32;
3018 u64 data64;
3019
3020 /* version */
3021 if (do_read_u32(ff, &data32))
3022 return -1;
3023
3024 if (data32 != 1)
3025 return -1;
3026
3027 /* clockid */
3028 if (do_read_u32(ff, &data32))
3029 return -1;
3030
3031 ff->ph->env.clock.clockid = data32;
3032
3033 /* TOD ref time */
3034 if (do_read_u64(ff, &data64))
3035 return -1;
3036
3037 ff->ph->env.clock.tod_ns = data64;
3038
3039 /* clockid ref time */
3040 if (do_read_u64(ff, &data64))
3041 return -1;
3042
3043 ff->ph->env.clock.clockid_ns = data64;
3044 ff->ph->env.clock.enabled = true;
3045 return 0;
3046}
3047
3048static int process_hybrid_topology(struct feat_fd *ff,
3049 void *data __maybe_unused)
3050{
3051 struct hybrid_node *nodes, *n;
3052 u32 nr, i;
3053
3054 /* nr nodes */
3055 if (do_read_u32(ff, &nr))
3056 return -1;
3057
3058 nodes = zalloc(sizeof(*nodes) * nr);
3059 if (!nodes)
3060 return -ENOMEM;
3061
3062 for (i = 0; i < nr; i++) {
3063 n = &nodes[i];
3064
3065 n->pmu_name = do_read_string(ff);
3066 if (!n->pmu_name)
3067 goto error;
3068
3069 n->cpus = do_read_string(ff);
3070 if (!n->cpus)
3071 goto error;
3072 }
3073
3074 ff->ph->env.nr_hybrid_nodes = nr;
3075 ff->ph->env.hybrid_nodes = nodes;
3076 return 0;
3077
3078error:
3079 for (i = 0; i < nr; i++) {
3080 free(nodes[i].pmu_name);
3081 free(nodes[i].cpus);
3082 }
3083
3084 free(nodes);
3085 return -1;
3086}
3087
3088static int process_dir_format(struct feat_fd *ff,
3089 void *_data __maybe_unused)
3090{
3091 struct perf_session *session;
3092 struct perf_data *data;
3093
3094 session = container_of(ff->ph, struct perf_session, header);
3095 data = session->data;
3096
3097 if (WARN_ON(!perf_data__is_dir(data)))
3098 return -1;
3099
3100 return do_read_u64(ff, &data->dir.version);
3101}
3102
3103#ifdef HAVE_LIBBPF_SUPPORT
3104static int process_bpf_prog_info(struct feat_fd *ff, void *data __maybe_unused)
3105{
3106 struct bpf_prog_info_node *info_node;
3107 struct perf_env *env = &ff->ph->env;
3108 struct perf_bpil *info_linear;
3109 u32 count, i;
3110 int err = -1;
3111
3112 if (ff->ph->needs_swap) {
3113 pr_warning("interpreting bpf_prog_info from systems with endianness is not yet supported\n");
3114 return 0;
3115 }
3116
3117 if (do_read_u32(ff, &count))
3118 return -1;
3119
3120 down_write(&env->bpf_progs.lock);
3121
3122 for (i = 0; i < count; ++i) {
3123 u32 info_len, data_len;
3124
3125 info_linear = NULL;
3126 info_node = NULL;
3127 if (do_read_u32(ff, &info_len))
3128 goto out;
3129 if (do_read_u32(ff, &data_len))
3130 goto out;
3131
3132 if (info_len > sizeof(struct bpf_prog_info)) {
3133 pr_warning("detected invalid bpf_prog_info\n");
3134 goto out;
3135 }
3136
3137 info_linear = malloc(sizeof(struct perf_bpil) +
3138 data_len);
3139 if (!info_linear)
3140 goto out;
3141 info_linear->info_len = sizeof(struct bpf_prog_info);
3142 info_linear->data_len = data_len;
3143 if (do_read_u64(ff, (u64 *)(&info_linear->arrays)))
3144 goto out;
3145 if (__do_read(ff, &info_linear->info, info_len))
3146 goto out;
3147 if (info_len < sizeof(struct bpf_prog_info))
3148 memset(((void *)(&info_linear->info)) + info_len, 0,
3149 sizeof(struct bpf_prog_info) - info_len);
3150
3151 if (__do_read(ff, info_linear->data, data_len))
3152 goto out;
3153
3154 info_node = malloc(sizeof(struct bpf_prog_info_node));
3155 if (!info_node)
3156 goto out;
3157
3158 /* after reading from file, translate offset to address */
3159 bpil_offs_to_addr(info_linear);
3160 info_node->info_linear = info_linear;
3161 if (!__perf_env__insert_bpf_prog_info(env, info_node)) {
3162 free(info_linear);
3163 free(info_node);
3164 }
3165 }
3166
3167 up_write(&env->bpf_progs.lock);
3168 return 0;
3169out:
3170 free(info_linear);
3171 free(info_node);
3172 up_write(&env->bpf_progs.lock);
3173 return err;
3174}
3175
3176static int process_bpf_btf(struct feat_fd *ff, void *data __maybe_unused)
3177{
3178 struct perf_env *env = &ff->ph->env;
3179 struct btf_node *node = NULL;
3180 u32 count, i;
3181 int err = -1;
3182
3183 if (ff->ph->needs_swap) {
3184 pr_warning("interpreting btf from systems with endianness is not yet supported\n");
3185 return 0;
3186 }
3187
3188 if (do_read_u32(ff, &count))
3189 return -1;
3190
3191 down_write(&env->bpf_progs.lock);
3192
3193 for (i = 0; i < count; ++i) {
3194 u32 id, data_size;
3195
3196 if (do_read_u32(ff, &id))
3197 goto out;
3198 if (do_read_u32(ff, &data_size))
3199 goto out;
3200
3201 node = malloc(sizeof(struct btf_node) + data_size);
3202 if (!node)
3203 goto out;
3204
3205 node->id = id;
3206 node->data_size = data_size;
3207
3208 if (__do_read(ff, node->data, data_size))
3209 goto out;
3210
3211 if (!__perf_env__insert_btf(env, node))
3212 free(node);
3213 node = NULL;
3214 }
3215
3216 err = 0;
3217out:
3218 up_write(&env->bpf_progs.lock);
3219 free(node);
3220 return err;
3221}
3222#endif // HAVE_LIBBPF_SUPPORT
3223
3224static int process_compressed(struct feat_fd *ff,
3225 void *data __maybe_unused)
3226{
3227 if (do_read_u32(ff, &(ff->ph->env.comp_ver)))
3228 return -1;
3229
3230 if (do_read_u32(ff, &(ff->ph->env.comp_type)))
3231 return -1;
3232
3233 if (do_read_u32(ff, &(ff->ph->env.comp_level)))
3234 return -1;
3235
3236 if (do_read_u32(ff, &(ff->ph->env.comp_ratio)))
3237 return -1;
3238
3239 if (do_read_u32(ff, &(ff->ph->env.comp_mmap_len)))
3240 return -1;
3241
3242 return 0;
3243}
3244
3245static int __process_pmu_caps(struct feat_fd *ff, int *nr_caps,
3246 char ***caps, unsigned int *max_branches,
3247 unsigned int *br_cntr_nr,
3248 unsigned int *br_cntr_width)
3249{
3250 char *name, *value, *ptr;
3251 u32 nr_pmu_caps, i;
3252
3253 *nr_caps = 0;
3254 *caps = NULL;
3255
3256 if (do_read_u32(ff, &nr_pmu_caps))
3257 return -1;
3258
3259 if (!nr_pmu_caps)
3260 return 0;
3261
3262 *caps = zalloc(sizeof(char *) * nr_pmu_caps);
3263 if (!*caps)
3264 return -1;
3265
3266 for (i = 0; i < nr_pmu_caps; i++) {
3267 name = do_read_string(ff);
3268 if (!name)
3269 goto error;
3270
3271 value = do_read_string(ff);
3272 if (!value)
3273 goto free_name;
3274
3275 if (asprintf(&ptr, "%s=%s", name, value) < 0)
3276 goto free_value;
3277
3278 (*caps)[i] = ptr;
3279
3280 if (!strcmp(name, "branches"))
3281 *max_branches = atoi(value);
3282
3283 if (!strcmp(name, "branch_counter_nr"))
3284 *br_cntr_nr = atoi(value);
3285
3286 if (!strcmp(name, "branch_counter_width"))
3287 *br_cntr_width = atoi(value);
3288
3289 free(value);
3290 free(name);
3291 }
3292 *nr_caps = nr_pmu_caps;
3293 return 0;
3294
3295free_value:
3296 free(value);
3297free_name:
3298 free(name);
3299error:
3300 for (; i > 0; i--)
3301 free((*caps)[i - 1]);
3302 free(*caps);
3303 *caps = NULL;
3304 *nr_caps = 0;
3305 return -1;
3306}
3307
3308static int process_cpu_pmu_caps(struct feat_fd *ff,
3309 void *data __maybe_unused)
3310{
3311 int ret = __process_pmu_caps(ff, &ff->ph->env.nr_cpu_pmu_caps,
3312 &ff->ph->env.cpu_pmu_caps,
3313 &ff->ph->env.max_branches,
3314 &ff->ph->env.br_cntr_nr,
3315 &ff->ph->env.br_cntr_width);
3316
3317 if (!ret && !ff->ph->env.cpu_pmu_caps)
3318 pr_debug("cpu pmu capabilities not available\n");
3319 return ret;
3320}
3321
3322static int process_pmu_caps(struct feat_fd *ff, void *data __maybe_unused)
3323{
3324 struct pmu_caps *pmu_caps;
3325 u32 nr_pmu, i;
3326 int ret;
3327 int j;
3328
3329 if (do_read_u32(ff, &nr_pmu))
3330 return -1;
3331
3332 if (!nr_pmu) {
3333 pr_debug("pmu capabilities not available\n");
3334 return 0;
3335 }
3336
3337 pmu_caps = zalloc(sizeof(*pmu_caps) * nr_pmu);
3338 if (!pmu_caps)
3339 return -ENOMEM;
3340
3341 for (i = 0; i < nr_pmu; i++) {
3342 ret = __process_pmu_caps(ff, &pmu_caps[i].nr_caps,
3343 &pmu_caps[i].caps,
3344 &pmu_caps[i].max_branches,
3345 &pmu_caps[i].br_cntr_nr,
3346 &pmu_caps[i].br_cntr_width);
3347 if (ret)
3348 goto err;
3349
3350 pmu_caps[i].pmu_name = do_read_string(ff);
3351 if (!pmu_caps[i].pmu_name) {
3352 ret = -1;
3353 goto err;
3354 }
3355 if (!pmu_caps[i].nr_caps) {
3356 pr_debug("%s pmu capabilities not available\n",
3357 pmu_caps[i].pmu_name);
3358 }
3359 }
3360
3361 ff->ph->env.nr_pmus_with_caps = nr_pmu;
3362 ff->ph->env.pmu_caps = pmu_caps;
3363 return 0;
3364
3365err:
3366 for (i = 0; i < nr_pmu; i++) {
3367 for (j = 0; j < pmu_caps[i].nr_caps; j++)
3368 free(pmu_caps[i].caps[j]);
3369 free(pmu_caps[i].caps);
3370 free(pmu_caps[i].pmu_name);
3371 }
3372
3373 free(pmu_caps);
3374 return ret;
3375}
3376
3377#define FEAT_OPR(n, func, __full_only) \
3378 [HEADER_##n] = { \
3379 .name = __stringify(n), \
3380 .write = write_##func, \
3381 .print = print_##func, \
3382 .full_only = __full_only, \
3383 .process = process_##func, \
3384 .synthesize = true \
3385 }
3386
3387#define FEAT_OPN(n, func, __full_only) \
3388 [HEADER_##n] = { \
3389 .name = __stringify(n), \
3390 .write = write_##func, \
3391 .print = print_##func, \
3392 .full_only = __full_only, \
3393 .process = process_##func \
3394 }
3395
3396/* feature_ops not implemented: */
3397#define print_tracing_data NULL
3398#define print_build_id NULL
3399
3400#define process_branch_stack NULL
3401#define process_stat NULL
3402
3403// Only used in util/synthetic-events.c
3404const struct perf_header_feature_ops feat_ops[HEADER_LAST_FEATURE];
3405
3406const struct perf_header_feature_ops feat_ops[HEADER_LAST_FEATURE] = {
3407#ifdef HAVE_LIBTRACEEVENT
3408 FEAT_OPN(TRACING_DATA, tracing_data, false),
3409#endif
3410 FEAT_OPN(BUILD_ID, build_id, false),
3411 FEAT_OPR(HOSTNAME, hostname, false),
3412 FEAT_OPR(OSRELEASE, osrelease, false),
3413 FEAT_OPR(VERSION, version, false),
3414 FEAT_OPR(ARCH, arch, false),
3415 FEAT_OPR(NRCPUS, nrcpus, false),
3416 FEAT_OPR(CPUDESC, cpudesc, false),
3417 FEAT_OPR(CPUID, cpuid, false),
3418 FEAT_OPR(TOTAL_MEM, total_mem, false),
3419 FEAT_OPR(EVENT_DESC, event_desc, false),
3420 FEAT_OPR(CMDLINE, cmdline, false),
3421 FEAT_OPR(CPU_TOPOLOGY, cpu_topology, true),
3422 FEAT_OPR(NUMA_TOPOLOGY, numa_topology, true),
3423 FEAT_OPN(BRANCH_STACK, branch_stack, false),
3424 FEAT_OPR(PMU_MAPPINGS, pmu_mappings, false),
3425 FEAT_OPR(GROUP_DESC, group_desc, false),
3426 FEAT_OPN(AUXTRACE, auxtrace, false),
3427 FEAT_OPN(STAT, stat, false),
3428 FEAT_OPN(CACHE, cache, true),
3429 FEAT_OPR(SAMPLE_TIME, sample_time, false),
3430 FEAT_OPR(MEM_TOPOLOGY, mem_topology, true),
3431 FEAT_OPR(CLOCKID, clockid, false),
3432 FEAT_OPN(DIR_FORMAT, dir_format, false),
3433#ifdef HAVE_LIBBPF_SUPPORT
3434 FEAT_OPR(BPF_PROG_INFO, bpf_prog_info, false),
3435 FEAT_OPR(BPF_BTF, bpf_btf, false),
3436#endif
3437 FEAT_OPR(COMPRESSED, compressed, false),
3438 FEAT_OPR(CPU_PMU_CAPS, cpu_pmu_caps, false),
3439 FEAT_OPR(CLOCK_DATA, clock_data, false),
3440 FEAT_OPN(HYBRID_TOPOLOGY, hybrid_topology, true),
3441 FEAT_OPR(PMU_CAPS, pmu_caps, false),
3442};
3443
3444struct header_print_data {
3445 FILE *fp;
3446 bool full; /* extended list of headers */
3447};
3448
3449static int perf_file_section__fprintf_info(struct perf_file_section *section,
3450 struct perf_header *ph,
3451 int feat, int fd, void *data)
3452{
3453 struct header_print_data *hd = data;
3454 struct feat_fd ff;
3455
3456 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
3457 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
3458 "%d, continuing...\n", section->offset, feat);
3459 return 0;
3460 }
3461 if (feat >= HEADER_LAST_FEATURE) {
3462 pr_warning("unknown feature %d\n", feat);
3463 return 0;
3464 }
3465 if (!feat_ops[feat].print)
3466 return 0;
3467
3468 ff = (struct feat_fd) {
3469 .fd = fd,
3470 .ph = ph,
3471 };
3472
3473 if (!feat_ops[feat].full_only || hd->full)
3474 feat_ops[feat].print(&ff, hd->fp);
3475 else
3476 fprintf(hd->fp, "# %s info available, use -I to display\n",
3477 feat_ops[feat].name);
3478
3479 return 0;
3480}
3481
3482int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
3483{
3484 struct header_print_data hd;
3485 struct perf_header *header = &session->header;
3486 int fd = perf_data__fd(session->data);
3487 struct stat st;
3488 time_t stctime;
3489 int ret, bit;
3490
3491 hd.fp = fp;
3492 hd.full = full;
3493
3494 ret = fstat(fd, &st);
3495 if (ret == -1)
3496 return -1;
3497
3498 stctime = st.st_mtime;
3499 fprintf(fp, "# captured on : %s", ctime(&stctime));
3500
3501 fprintf(fp, "# header version : %u\n", header->version);
3502 fprintf(fp, "# data offset : %" PRIu64 "\n", header->data_offset);
3503 fprintf(fp, "# data size : %" PRIu64 "\n", header->data_size);
3504 fprintf(fp, "# feat offset : %" PRIu64 "\n", header->feat_offset);
3505
3506 perf_header__process_sections(header, fd, &hd,
3507 perf_file_section__fprintf_info);
3508
3509 if (session->data->is_pipe)
3510 return 0;
3511
3512 fprintf(fp, "# missing features: ");
3513 for_each_clear_bit(bit, header->adds_features, HEADER_LAST_FEATURE) {
3514 if (bit)
3515 fprintf(fp, "%s ", feat_ops[bit].name);
3516 }
3517
3518 fprintf(fp, "\n");
3519 return 0;
3520}
3521
3522struct header_fw {
3523 struct feat_writer fw;
3524 struct feat_fd *ff;
3525};
3526
3527static int feat_writer_cb(struct feat_writer *fw, void *buf, size_t sz)
3528{
3529 struct header_fw *h = container_of(fw, struct header_fw, fw);
3530
3531 return do_write(h->ff, buf, sz);
3532}
3533
3534static int do_write_feat(struct feat_fd *ff, int type,
3535 struct perf_file_section **p,
3536 struct evlist *evlist,
3537 struct feat_copier *fc)
3538{
3539 int err;
3540 int ret = 0;
3541
3542 if (perf_header__has_feat(ff->ph, type)) {
3543 if (!feat_ops[type].write)
3544 return -1;
3545
3546 if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__))
3547 return -1;
3548
3549 (*p)->offset = lseek(ff->fd, 0, SEEK_CUR);
3550
3551 /*
3552 * Hook to let perf inject copy features sections from the input
3553 * file.
3554 */
3555 if (fc && fc->copy) {
3556 struct header_fw h = {
3557 .fw.write = feat_writer_cb,
3558 .ff = ff,
3559 };
3560
3561 /* ->copy() returns 0 if the feature was not copied */
3562 err = fc->copy(fc, type, &h.fw);
3563 } else {
3564 err = 0;
3565 }
3566 if (!err)
3567 err = feat_ops[type].write(ff, evlist);
3568 if (err < 0) {
3569 pr_debug("failed to write feature %s\n", feat_ops[type].name);
3570
3571 /* undo anything written */
3572 lseek(ff->fd, (*p)->offset, SEEK_SET);
3573
3574 return -1;
3575 }
3576 (*p)->size = lseek(ff->fd, 0, SEEK_CUR) - (*p)->offset;
3577 (*p)++;
3578 }
3579 return ret;
3580}
3581
3582static int perf_header__adds_write(struct perf_header *header,
3583 struct evlist *evlist, int fd,
3584 struct feat_copier *fc)
3585{
3586 int nr_sections;
3587 struct feat_fd ff = {
3588 .fd = fd,
3589 .ph = header,
3590 };
3591 struct perf_file_section *feat_sec, *p;
3592 int sec_size;
3593 u64 sec_start;
3594 int feat;
3595 int err;
3596
3597 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
3598 if (!nr_sections)
3599 return 0;
3600
3601 feat_sec = p = calloc(nr_sections, sizeof(*feat_sec));
3602 if (feat_sec == NULL)
3603 return -ENOMEM;
3604
3605 sec_size = sizeof(*feat_sec) * nr_sections;
3606
3607 sec_start = header->feat_offset;
3608 lseek(fd, sec_start + sec_size, SEEK_SET);
3609
3610 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
3611 if (do_write_feat(&ff, feat, &p, evlist, fc))
3612 perf_header__clear_feat(header, feat);
3613 }
3614
3615 lseek(fd, sec_start, SEEK_SET);
3616 /*
3617 * may write more than needed due to dropped feature, but
3618 * this is okay, reader will skip the missing entries
3619 */
3620 err = do_write(&ff, feat_sec, sec_size);
3621 if (err < 0)
3622 pr_debug("failed to write feature section\n");
3623 free(ff.buf); /* TODO: added to silence clang-tidy. */
3624 free(feat_sec);
3625 return err;
3626}
3627
3628int perf_header__write_pipe(int fd)
3629{
3630 struct perf_pipe_file_header f_header;
3631 struct feat_fd ff = {
3632 .fd = fd,
3633 };
3634 int err;
3635
3636 f_header = (struct perf_pipe_file_header){
3637 .magic = PERF_MAGIC,
3638 .size = sizeof(f_header),
3639 };
3640
3641 err = do_write(&ff, &f_header, sizeof(f_header));
3642 if (err < 0) {
3643 pr_debug("failed to write perf pipe header\n");
3644 return err;
3645 }
3646 free(ff.buf);
3647 return 0;
3648}
3649
3650static int perf_session__do_write_header(struct perf_session *session,
3651 struct evlist *evlist,
3652 int fd, bool at_exit,
3653 struct feat_copier *fc,
3654 bool write_attrs_after_data)
3655{
3656 struct perf_file_header f_header;
3657 struct perf_header *header = &session->header;
3658 struct evsel *evsel;
3659 struct feat_fd ff = {
3660 .fd = fd,
3661 };
3662 u64 attr_offset = sizeof(f_header), attr_size = 0;
3663 int err;
3664
3665 if (write_attrs_after_data && at_exit) {
3666 /*
3667 * Write features at the end of the file first so that
3668 * attributes may come after them.
3669 */
3670 if (!header->data_offset && header->data_size) {
3671 pr_err("File contains data but offset unknown\n");
3672 err = -1;
3673 goto err_out;
3674 }
3675 header->feat_offset = header->data_offset + header->data_size;
3676 err = perf_header__adds_write(header, evlist, fd, fc);
3677 if (err < 0)
3678 goto err_out;
3679 attr_offset = lseek(fd, 0, SEEK_CUR);
3680 } else {
3681 lseek(fd, attr_offset, SEEK_SET);
3682 }
3683
3684 evlist__for_each_entry(session->evlist, evsel) {
3685 evsel->id_offset = attr_offset;
3686 /* Avoid writing at the end of the file until the session is exiting. */
3687 if (!write_attrs_after_data || at_exit) {
3688 err = do_write(&ff, evsel->core.id, evsel->core.ids * sizeof(u64));
3689 if (err < 0) {
3690 pr_debug("failed to write perf header\n");
3691 goto err_out;
3692 }
3693 }
3694 attr_offset += evsel->core.ids * sizeof(u64);
3695 }
3696
3697 evlist__for_each_entry(evlist, evsel) {
3698 if (evsel->core.attr.size < sizeof(evsel->core.attr)) {
3699 /*
3700 * We are likely in "perf inject" and have read
3701 * from an older file. Update attr size so that
3702 * reader gets the right offset to the ids.
3703 */
3704 evsel->core.attr.size = sizeof(evsel->core.attr);
3705 }
3706 /* Avoid writing at the end of the file until the session is exiting. */
3707 if (!write_attrs_after_data || at_exit) {
3708 struct perf_file_attr f_attr = {
3709 .attr = evsel->core.attr,
3710 .ids = {
3711 .offset = evsel->id_offset,
3712 .size = evsel->core.ids * sizeof(u64),
3713 }
3714 };
3715 err = do_write(&ff, &f_attr, sizeof(f_attr));
3716 if (err < 0) {
3717 pr_debug("failed to write perf header attribute\n");
3718 goto err_out;
3719 }
3720 }
3721 attr_size += sizeof(struct perf_file_attr);
3722 }
3723
3724 if (!header->data_offset) {
3725 if (write_attrs_after_data)
3726 header->data_offset = sizeof(f_header);
3727 else
3728 header->data_offset = attr_offset + attr_size;
3729 }
3730 header->feat_offset = header->data_offset + header->data_size;
3731
3732 if (!write_attrs_after_data && at_exit) {
3733 /* Write features now feat_offset is known. */
3734 err = perf_header__adds_write(header, evlist, fd, fc);
3735 if (err < 0)
3736 goto err_out;
3737 }
3738
3739 f_header = (struct perf_file_header){
3740 .magic = PERF_MAGIC,
3741 .size = sizeof(f_header),
3742 .attr_size = sizeof(struct perf_file_attr),
3743 .attrs = {
3744 .offset = attr_offset,
3745 .size = attr_size,
3746 },
3747 .data = {
3748 .offset = header->data_offset,
3749 .size = header->data_size,
3750 },
3751 /* event_types is ignored, store zeros */
3752 };
3753
3754 memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features));
3755
3756 lseek(fd, 0, SEEK_SET);
3757 err = do_write(&ff, &f_header, sizeof(f_header));
3758 if (err < 0) {
3759 pr_debug("failed to write perf header\n");
3760 goto err_out;
3761 } else {
3762 lseek(fd, 0, SEEK_END);
3763 err = 0;
3764 }
3765err_out:
3766 free(ff.buf);
3767 return err;
3768}
3769
3770int perf_session__write_header(struct perf_session *session,
3771 struct evlist *evlist,
3772 int fd, bool at_exit)
3773{
3774 return perf_session__do_write_header(session, evlist, fd, at_exit, /*fc=*/NULL,
3775 /*write_attrs_after_data=*/false);
3776}
3777
3778size_t perf_session__data_offset(const struct evlist *evlist)
3779{
3780 struct evsel *evsel;
3781 size_t data_offset;
3782
3783 data_offset = sizeof(struct perf_file_header);
3784 evlist__for_each_entry(evlist, evsel) {
3785 data_offset += evsel->core.ids * sizeof(u64);
3786 }
3787 data_offset += evlist->core.nr_entries * sizeof(struct perf_file_attr);
3788
3789 return data_offset;
3790}
3791
3792int perf_session__inject_header(struct perf_session *session,
3793 struct evlist *evlist,
3794 int fd,
3795 struct feat_copier *fc,
3796 bool write_attrs_after_data)
3797{
3798 return perf_session__do_write_header(session, evlist, fd, true, fc,
3799 write_attrs_after_data);
3800}
3801
3802static int perf_header__getbuffer64(struct perf_header *header,
3803 int fd, void *buf, size_t size)
3804{
3805 if (readn(fd, buf, size) <= 0)
3806 return -1;
3807
3808 if (header->needs_swap)
3809 mem_bswap_64(buf, size);
3810
3811 return 0;
3812}
3813
3814int perf_header__process_sections(struct perf_header *header, int fd,
3815 void *data,
3816 int (*process)(struct perf_file_section *section,
3817 struct perf_header *ph,
3818 int feat, int fd, void *data))
3819{
3820 struct perf_file_section *feat_sec, *sec;
3821 int nr_sections;
3822 int sec_size;
3823 int feat;
3824 int err;
3825
3826 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
3827 if (!nr_sections)
3828 return 0;
3829
3830 feat_sec = sec = calloc(nr_sections, sizeof(*feat_sec));
3831 if (!feat_sec)
3832 return -1;
3833
3834 sec_size = sizeof(*feat_sec) * nr_sections;
3835
3836 lseek(fd, header->feat_offset, SEEK_SET);
3837
3838 err = perf_header__getbuffer64(header, fd, feat_sec, sec_size);
3839 if (err < 0)
3840 goto out_free;
3841
3842 for_each_set_bit(feat, header->adds_features, HEADER_LAST_FEATURE) {
3843 err = process(sec++, header, feat, fd, data);
3844 if (err < 0)
3845 goto out_free;
3846 }
3847 err = 0;
3848out_free:
3849 free(feat_sec);
3850 return err;
3851}
3852
3853static const int attr_file_abi_sizes[] = {
3854 [0] = PERF_ATTR_SIZE_VER0,
3855 [1] = PERF_ATTR_SIZE_VER1,
3856 [2] = PERF_ATTR_SIZE_VER2,
3857 [3] = PERF_ATTR_SIZE_VER3,
3858 [4] = PERF_ATTR_SIZE_VER4,
3859 0,
3860};
3861
3862/*
3863 * In the legacy file format, the magic number is not used to encode endianness.
3864 * hdr_sz was used to encode endianness. But given that hdr_sz can vary based
3865 * on ABI revisions, we need to try all combinations for all endianness to
3866 * detect the endianness.
3867 */
3868static int try_all_file_abis(uint64_t hdr_sz, struct perf_header *ph)
3869{
3870 uint64_t ref_size, attr_size;
3871 int i;
3872
3873 for (i = 0 ; attr_file_abi_sizes[i]; i++) {
3874 ref_size = attr_file_abi_sizes[i]
3875 + sizeof(struct perf_file_section);
3876 if (hdr_sz != ref_size) {
3877 attr_size = bswap_64(hdr_sz);
3878 if (attr_size != ref_size)
3879 continue;
3880
3881 ph->needs_swap = true;
3882 }
3883 pr_debug("ABI%d perf.data file detected, need_swap=%d\n",
3884 i,
3885 ph->needs_swap);
3886 return 0;
3887 }
3888 /* could not determine endianness */
3889 return -1;
3890}
3891
3892#define PERF_PIPE_HDR_VER0 16
3893
3894static const size_t attr_pipe_abi_sizes[] = {
3895 [0] = PERF_PIPE_HDR_VER0,
3896 0,
3897};
3898
3899/*
3900 * In the legacy pipe format, there is an implicit assumption that endianness
3901 * between host recording the samples, and host parsing the samples is the
3902 * same. This is not always the case given that the pipe output may always be
3903 * redirected into a file and analyzed on a different machine with possibly a
3904 * different endianness and perf_event ABI revisions in the perf tool itself.
3905 */
3906static int try_all_pipe_abis(uint64_t hdr_sz, struct perf_header *ph)
3907{
3908 u64 attr_size;
3909 int i;
3910
3911 for (i = 0 ; attr_pipe_abi_sizes[i]; i++) {
3912 if (hdr_sz != attr_pipe_abi_sizes[i]) {
3913 attr_size = bswap_64(hdr_sz);
3914 if (attr_size != hdr_sz)
3915 continue;
3916
3917 ph->needs_swap = true;
3918 }
3919 pr_debug("Pipe ABI%d perf.data file detected\n", i);
3920 return 0;
3921 }
3922 return -1;
3923}
3924
3925bool is_perf_magic(u64 magic)
3926{
3927 if (!memcmp(&magic, __perf_magic1, sizeof(magic))
3928 || magic == __perf_magic2
3929 || magic == __perf_magic2_sw)
3930 return true;
3931
3932 return false;
3933}
3934
3935static int check_magic_endian(u64 magic, uint64_t hdr_sz,
3936 bool is_pipe, struct perf_header *ph)
3937{
3938 int ret;
3939
3940 /* check for legacy format */
3941 ret = memcmp(&magic, __perf_magic1, sizeof(magic));
3942 if (ret == 0) {
3943 ph->version = PERF_HEADER_VERSION_1;
3944 pr_debug("legacy perf.data format\n");
3945 if (is_pipe)
3946 return try_all_pipe_abis(hdr_sz, ph);
3947
3948 return try_all_file_abis(hdr_sz, ph);
3949 }
3950 /*
3951 * the new magic number serves two purposes:
3952 * - unique number to identify actual perf.data files
3953 * - encode endianness of file
3954 */
3955 ph->version = PERF_HEADER_VERSION_2;
3956
3957 /* check magic number with one endianness */
3958 if (magic == __perf_magic2)
3959 return 0;
3960
3961 /* check magic number with opposite endianness */
3962 if (magic != __perf_magic2_sw)
3963 return -1;
3964
3965 ph->needs_swap = true;
3966
3967 return 0;
3968}
3969
3970int perf_file_header__read(struct perf_file_header *header,
3971 struct perf_header *ph, int fd)
3972{
3973 ssize_t ret;
3974
3975 lseek(fd, 0, SEEK_SET);
3976
3977 ret = readn(fd, header, sizeof(*header));
3978 if (ret <= 0)
3979 return -1;
3980
3981 if (check_magic_endian(header->magic,
3982 header->attr_size, false, ph) < 0) {
3983 pr_debug("magic/endian check failed\n");
3984 return -1;
3985 }
3986
3987 if (ph->needs_swap) {
3988 mem_bswap_64(header, offsetof(struct perf_file_header,
3989 adds_features));
3990 }
3991
3992 if (header->size > header->attrs.offset) {
3993 pr_err("Perf file header corrupt: header overlaps attrs\n");
3994 return -1;
3995 }
3996
3997 if (header->size > header->data.offset) {
3998 pr_err("Perf file header corrupt: header overlaps data\n");
3999 return -1;
4000 }
4001
4002 if ((header->attrs.offset <= header->data.offset &&
4003 header->attrs.offset + header->attrs.size > header->data.offset) ||
4004 (header->attrs.offset > header->data.offset &&
4005 header->data.offset + header->data.size > header->attrs.offset)) {
4006 pr_err("Perf file header corrupt: Attributes and data overlap\n");
4007 return -1;
4008 }
4009
4010 if (header->size != sizeof(*header)) {
4011 /* Support the previous format */
4012 if (header->size == offsetof(typeof(*header), adds_features))
4013 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
4014 else
4015 return -1;
4016 } else if (ph->needs_swap) {
4017 /*
4018 * feature bitmap is declared as an array of unsigned longs --
4019 * not good since its size can differ between the host that
4020 * generated the data file and the host analyzing the file.
4021 *
4022 * We need to handle endianness, but we don't know the size of
4023 * the unsigned long where the file was generated. Take a best
4024 * guess at determining it: try 64-bit swap first (ie., file
4025 * created on a 64-bit host), and check if the hostname feature
4026 * bit is set (this feature bit is forced on as of fbe96f2).
4027 * If the bit is not, undo the 64-bit swap and try a 32-bit
4028 * swap. If the hostname bit is still not set (e.g., older data
4029 * file), punt and fallback to the original behavior --
4030 * clearing all feature bits and setting buildid.
4031 */
4032 mem_bswap_64(&header->adds_features,
4033 BITS_TO_U64(HEADER_FEAT_BITS));
4034
4035 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
4036 /* unswap as u64 */
4037 mem_bswap_64(&header->adds_features,
4038 BITS_TO_U64(HEADER_FEAT_BITS));
4039
4040 /* unswap as u32 */
4041 mem_bswap_32(&header->adds_features,
4042 BITS_TO_U32(HEADER_FEAT_BITS));
4043 }
4044
4045 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
4046 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
4047 __set_bit(HEADER_BUILD_ID, header->adds_features);
4048 }
4049 }
4050
4051 memcpy(&ph->adds_features, &header->adds_features,
4052 sizeof(ph->adds_features));
4053
4054 ph->data_offset = header->data.offset;
4055 ph->data_size = header->data.size;
4056 ph->feat_offset = header->data.offset + header->data.size;
4057 return 0;
4058}
4059
4060static int perf_file_section__process(struct perf_file_section *section,
4061 struct perf_header *ph,
4062 int feat, int fd, void *data)
4063{
4064 struct feat_fd fdd = {
4065 .fd = fd,
4066 .ph = ph,
4067 .size = section->size,
4068 .offset = section->offset,
4069 };
4070
4071 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
4072 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
4073 "%d, continuing...\n", section->offset, feat);
4074 return 0;
4075 }
4076
4077 if (feat >= HEADER_LAST_FEATURE) {
4078 pr_debug("unknown feature %d, continuing...\n", feat);
4079 return 0;
4080 }
4081
4082 if (!feat_ops[feat].process)
4083 return 0;
4084
4085 return feat_ops[feat].process(&fdd, data);
4086}
4087
4088static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
4089 struct perf_header *ph,
4090 struct perf_data *data)
4091{
4092 ssize_t ret;
4093
4094 ret = perf_data__read(data, header, sizeof(*header));
4095 if (ret <= 0)
4096 return -1;
4097
4098 if (check_magic_endian(header->magic, header->size, true, ph) < 0) {
4099 pr_debug("endian/magic failed\n");
4100 return -1;
4101 }
4102
4103 if (ph->needs_swap)
4104 header->size = bswap_64(header->size);
4105
4106 return 0;
4107}
4108
4109static int perf_header__read_pipe(struct perf_session *session)
4110{
4111 struct perf_header *header = &session->header;
4112 struct perf_pipe_file_header f_header;
4113
4114 if (perf_file_header__read_pipe(&f_header, header, session->data) < 0) {
4115 pr_debug("incompatible file format\n");
4116 return -EINVAL;
4117 }
4118
4119 return f_header.size == sizeof(f_header) ? 0 : -1;
4120}
4121
4122static int read_attr(int fd, struct perf_header *ph,
4123 struct perf_file_attr *f_attr)
4124{
4125 struct perf_event_attr *attr = &f_attr->attr;
4126 size_t sz, left;
4127 size_t our_sz = sizeof(f_attr->attr);
4128 ssize_t ret;
4129
4130 memset(f_attr, 0, sizeof(*f_attr));
4131
4132 /* read minimal guaranteed structure */
4133 ret = readn(fd, attr, PERF_ATTR_SIZE_VER0);
4134 if (ret <= 0) {
4135 pr_debug("cannot read %d bytes of header attr\n",
4136 PERF_ATTR_SIZE_VER0);
4137 return -1;
4138 }
4139
4140 /* on file perf_event_attr size */
4141 sz = attr->size;
4142
4143 if (ph->needs_swap)
4144 sz = bswap_32(sz);
4145
4146 if (sz == 0) {
4147 /* assume ABI0 */
4148 sz = PERF_ATTR_SIZE_VER0;
4149 } else if (sz > our_sz) {
4150 pr_debug("file uses a more recent and unsupported ABI"
4151 " (%zu bytes extra)\n", sz - our_sz);
4152 return -1;
4153 }
4154 /* what we have not yet read and that we know about */
4155 left = sz - PERF_ATTR_SIZE_VER0;
4156 if (left) {
4157 void *ptr = attr;
4158 ptr += PERF_ATTR_SIZE_VER0;
4159
4160 ret = readn(fd, ptr, left);
4161 }
4162 /* read perf_file_section, ids are read in caller */
4163 ret = readn(fd, &f_attr->ids, sizeof(f_attr->ids));
4164
4165 return ret <= 0 ? -1 : 0;
4166}
4167
4168#ifdef HAVE_LIBTRACEEVENT
4169static int evsel__prepare_tracepoint_event(struct evsel *evsel, struct tep_handle *pevent)
4170{
4171 struct tep_event *event;
4172 char bf[128];
4173
4174 /* already prepared */
4175 if (evsel->tp_format)
4176 return 0;
4177
4178 if (pevent == NULL) {
4179 pr_debug("broken or missing trace data\n");
4180 return -1;
4181 }
4182
4183 event = tep_find_event(pevent, evsel->core.attr.config);
4184 if (event == NULL) {
4185 pr_debug("cannot find event format for %d\n", (int)evsel->core.attr.config);
4186 return -1;
4187 }
4188
4189 if (!evsel->name) {
4190 snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name);
4191 evsel->name = strdup(bf);
4192 if (evsel->name == NULL)
4193 return -1;
4194 }
4195
4196 evsel->tp_format = event;
4197 return 0;
4198}
4199
4200static int evlist__prepare_tracepoint_events(struct evlist *evlist, struct tep_handle *pevent)
4201{
4202 struct evsel *pos;
4203
4204 evlist__for_each_entry(evlist, pos) {
4205 if (pos->core.attr.type == PERF_TYPE_TRACEPOINT &&
4206 evsel__prepare_tracepoint_event(pos, pevent))
4207 return -1;
4208 }
4209
4210 return 0;
4211}
4212#endif
4213
4214int perf_session__read_header(struct perf_session *session)
4215{
4216 struct perf_data *data = session->data;
4217 struct perf_header *header = &session->header;
4218 struct perf_file_header f_header;
4219 struct perf_file_attr f_attr;
4220 u64 f_id;
4221 int nr_attrs, nr_ids, i, j, err;
4222 int fd = perf_data__fd(data);
4223
4224 session->evlist = evlist__new();
4225 if (session->evlist == NULL)
4226 return -ENOMEM;
4227
4228 session->evlist->env = &header->env;
4229 session->machines.host.env = &header->env;
4230
4231 /*
4232 * We can read 'pipe' data event from regular file,
4233 * check for the pipe header regardless of source.
4234 */
4235 err = perf_header__read_pipe(session);
4236 if (!err || perf_data__is_pipe(data)) {
4237 data->is_pipe = true;
4238 return err;
4239 }
4240
4241 if (perf_file_header__read(&f_header, header, fd) < 0)
4242 return -EINVAL;
4243
4244 if (header->needs_swap && data->in_place_update) {
4245 pr_err("In-place update not supported when byte-swapping is required\n");
4246 return -EINVAL;
4247 }
4248
4249 /*
4250 * Sanity check that perf.data was written cleanly; data size is
4251 * initialized to 0 and updated only if the on_exit function is run.
4252 * If data size is still 0 then the file contains only partial
4253 * information. Just warn user and process it as much as it can.
4254 */
4255 if (f_header.data.size == 0) {
4256 pr_warning("WARNING: The %s file's data size field is 0 which is unexpected.\n"
4257 "Was the 'perf record' command properly terminated?\n",
4258 data->file.path);
4259 }
4260
4261 if (f_header.attr_size == 0) {
4262 pr_err("ERROR: The %s file's attr size field is 0 which is unexpected.\n"
4263 "Was the 'perf record' command properly terminated?\n",
4264 data->file.path);
4265 return -EINVAL;
4266 }
4267
4268 nr_attrs = f_header.attrs.size / f_header.attr_size;
4269 lseek(fd, f_header.attrs.offset, SEEK_SET);
4270
4271 for (i = 0; i < nr_attrs; i++) {
4272 struct evsel *evsel;
4273 off_t tmp;
4274
4275 if (read_attr(fd, header, &f_attr) < 0)
4276 goto out_errno;
4277
4278 if (header->needs_swap) {
4279 f_attr.ids.size = bswap_64(f_attr.ids.size);
4280 f_attr.ids.offset = bswap_64(f_attr.ids.offset);
4281 perf_event__attr_swap(&f_attr.attr);
4282 }
4283
4284 tmp = lseek(fd, 0, SEEK_CUR);
4285 evsel = evsel__new(&f_attr.attr);
4286
4287 if (evsel == NULL)
4288 goto out_delete_evlist;
4289
4290 evsel->needs_swap = header->needs_swap;
4291 /*
4292 * Do it before so that if perf_evsel__alloc_id fails, this
4293 * entry gets purged too at evlist__delete().
4294 */
4295 evlist__add(session->evlist, evsel);
4296
4297 nr_ids = f_attr.ids.size / sizeof(u64);
4298 /*
4299 * We don't have the cpu and thread maps on the header, so
4300 * for allocating the perf_sample_id table we fake 1 cpu and
4301 * hattr->ids threads.
4302 */
4303 if (perf_evsel__alloc_id(&evsel->core, 1, nr_ids))
4304 goto out_delete_evlist;
4305
4306 lseek(fd, f_attr.ids.offset, SEEK_SET);
4307
4308 for (j = 0; j < nr_ids; j++) {
4309 if (perf_header__getbuffer64(header, fd, &f_id, sizeof(f_id)))
4310 goto out_errno;
4311
4312 perf_evlist__id_add(&session->evlist->core, &evsel->core, 0, j, f_id);
4313 }
4314
4315 lseek(fd, tmp, SEEK_SET);
4316 }
4317
4318#ifdef HAVE_LIBTRACEEVENT
4319 perf_header__process_sections(header, fd, &session->tevent,
4320 perf_file_section__process);
4321
4322 if (evlist__prepare_tracepoint_events(session->evlist, session->tevent.pevent))
4323 goto out_delete_evlist;
4324#else
4325 perf_header__process_sections(header, fd, NULL, perf_file_section__process);
4326#endif
4327
4328 return 0;
4329out_errno:
4330 return -errno;
4331
4332out_delete_evlist:
4333 evlist__delete(session->evlist);
4334 session->evlist = NULL;
4335 return -ENOMEM;
4336}
4337
4338int perf_event__process_feature(struct perf_session *session,
4339 union perf_event *event)
4340{
4341 const struct perf_tool *tool = session->tool;
4342 struct feat_fd ff = { .fd = 0 };
4343 struct perf_record_header_feature *fe = (struct perf_record_header_feature *)event;
4344 int type = fe->header.type;
4345 u64 feat = fe->feat_id;
4346 int ret = 0;
4347
4348 if (type < 0 || type >= PERF_RECORD_HEADER_MAX) {
4349 pr_warning("invalid record type %d in pipe-mode\n", type);
4350 return 0;
4351 }
4352 if (feat == HEADER_RESERVED || feat >= HEADER_LAST_FEATURE) {
4353 pr_warning("invalid record type %d in pipe-mode\n", type);
4354 return -1;
4355 }
4356
4357 if (!feat_ops[feat].process)
4358 return 0;
4359
4360 ff.buf = (void *)fe->data;
4361 ff.size = event->header.size - sizeof(*fe);
4362 ff.ph = &session->header;
4363
4364 if (feat_ops[feat].process(&ff, NULL)) {
4365 ret = -1;
4366 goto out;
4367 }
4368
4369 if (!feat_ops[feat].print || !tool->show_feat_hdr)
4370 goto out;
4371
4372 if (!feat_ops[feat].full_only ||
4373 tool->show_feat_hdr >= SHOW_FEAT_HEADER_FULL_INFO) {
4374 feat_ops[feat].print(&ff, stdout);
4375 } else {
4376 fprintf(stdout, "# %s info available, use -I to display\n",
4377 feat_ops[feat].name);
4378 }
4379out:
4380 free_event_desc(ff.events);
4381 return ret;
4382}
4383
4384size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp)
4385{
4386 struct perf_record_event_update *ev = &event->event_update;
4387 struct perf_cpu_map *map;
4388 size_t ret;
4389
4390 ret = fprintf(fp, "\n... id: %" PRI_lu64 "\n", ev->id);
4391
4392 switch (ev->type) {
4393 case PERF_EVENT_UPDATE__SCALE:
4394 ret += fprintf(fp, "... scale: %f\n", ev->scale.scale);
4395 break;
4396 case PERF_EVENT_UPDATE__UNIT:
4397 ret += fprintf(fp, "... unit: %s\n", ev->unit);
4398 break;
4399 case PERF_EVENT_UPDATE__NAME:
4400 ret += fprintf(fp, "... name: %s\n", ev->name);
4401 break;
4402 case PERF_EVENT_UPDATE__CPUS:
4403 ret += fprintf(fp, "... ");
4404
4405 map = cpu_map__new_data(&ev->cpus.cpus);
4406 if (map) {
4407 ret += cpu_map__fprintf(map, fp);
4408 perf_cpu_map__put(map);
4409 } else
4410 ret += fprintf(fp, "failed to get cpus\n");
4411 break;
4412 default:
4413 ret += fprintf(fp, "... unknown type\n");
4414 break;
4415 }
4416
4417 return ret;
4418}
4419
4420int perf_event__process_attr(const struct perf_tool *tool __maybe_unused,
4421 union perf_event *event,
4422 struct evlist **pevlist)
4423{
4424 u32 i, n_ids;
4425 u64 *ids;
4426 struct evsel *evsel;
4427 struct evlist *evlist = *pevlist;
4428
4429 if (evlist == NULL) {
4430 *pevlist = evlist = evlist__new();
4431 if (evlist == NULL)
4432 return -ENOMEM;
4433 }
4434
4435 evsel = evsel__new(&event->attr.attr);
4436 if (evsel == NULL)
4437 return -ENOMEM;
4438
4439 evlist__add(evlist, evsel);
4440
4441 n_ids = event->header.size - sizeof(event->header) - event->attr.attr.size;
4442 n_ids = n_ids / sizeof(u64);
4443 /*
4444 * We don't have the cpu and thread maps on the header, so
4445 * for allocating the perf_sample_id table we fake 1 cpu and
4446 * hattr->ids threads.
4447 */
4448 if (perf_evsel__alloc_id(&evsel->core, 1, n_ids))
4449 return -ENOMEM;
4450
4451 ids = perf_record_header_attr_id(event);
4452 for (i = 0; i < n_ids; i++) {
4453 perf_evlist__id_add(&evlist->core, &evsel->core, 0, i, ids[i]);
4454 }
4455
4456 return 0;
4457}
4458
4459int perf_event__process_event_update(const struct perf_tool *tool __maybe_unused,
4460 union perf_event *event,
4461 struct evlist **pevlist)
4462{
4463 struct perf_record_event_update *ev = &event->event_update;
4464 struct evlist *evlist;
4465 struct evsel *evsel;
4466 struct perf_cpu_map *map;
4467
4468 if (dump_trace)
4469 perf_event__fprintf_event_update(event, stdout);
4470
4471 if (!pevlist || *pevlist == NULL)
4472 return -EINVAL;
4473
4474 evlist = *pevlist;
4475
4476 evsel = evlist__id2evsel(evlist, ev->id);
4477 if (evsel == NULL)
4478 return -EINVAL;
4479
4480 switch (ev->type) {
4481 case PERF_EVENT_UPDATE__UNIT:
4482 free((char *)evsel->unit);
4483 evsel->unit = strdup(ev->unit);
4484 break;
4485 case PERF_EVENT_UPDATE__NAME:
4486 free(evsel->name);
4487 evsel->name = strdup(ev->name);
4488 break;
4489 case PERF_EVENT_UPDATE__SCALE:
4490 evsel->scale = ev->scale.scale;
4491 break;
4492 case PERF_EVENT_UPDATE__CPUS:
4493 map = cpu_map__new_data(&ev->cpus.cpus);
4494 if (map) {
4495 perf_cpu_map__put(evsel->core.own_cpus);
4496 evsel->core.own_cpus = map;
4497 } else
4498 pr_err("failed to get event_update cpus\n");
4499 default:
4500 break;
4501 }
4502
4503 return 0;
4504}
4505
4506#ifdef HAVE_LIBTRACEEVENT
4507int perf_event__process_tracing_data(struct perf_session *session,
4508 union perf_event *event)
4509{
4510 ssize_t size_read, padding, size = event->tracing_data.size;
4511 int fd = perf_data__fd(session->data);
4512 char buf[BUFSIZ];
4513
4514 /*
4515 * The pipe fd is already in proper place and in any case
4516 * we can't move it, and we'd screw the case where we read
4517 * 'pipe' data from regular file. The trace_report reads
4518 * data from 'fd' so we need to set it directly behind the
4519 * event, where the tracing data starts.
4520 */
4521 if (!perf_data__is_pipe(session->data)) {
4522 off_t offset = lseek(fd, 0, SEEK_CUR);
4523
4524 /* setup for reading amidst mmap */
4525 lseek(fd, offset + sizeof(struct perf_record_header_tracing_data),
4526 SEEK_SET);
4527 }
4528
4529 size_read = trace_report(fd, &session->tevent, session->trace_event_repipe);
4530 padding = PERF_ALIGN(size_read, sizeof(u64)) - size_read;
4531
4532 if (readn(fd, buf, padding) < 0) {
4533 pr_err("%s: reading input file", __func__);
4534 return -1;
4535 }
4536 if (session->trace_event_repipe) {
4537 int retw = write(STDOUT_FILENO, buf, padding);
4538 if (retw <= 0 || retw != padding) {
4539 pr_err("%s: repiping tracing data padding", __func__);
4540 return -1;
4541 }
4542 }
4543
4544 if (size_read + padding != size) {
4545 pr_err("%s: tracing data size mismatch", __func__);
4546 return -1;
4547 }
4548
4549 evlist__prepare_tracepoint_events(session->evlist, session->tevent.pevent);
4550
4551 return size_read + padding;
4552}
4553#endif
4554
4555int perf_event__process_build_id(struct perf_session *session,
4556 union perf_event *event)
4557{
4558 __event_process_build_id(&event->build_id,
4559 event->build_id.filename,
4560 session);
4561 return 0;
4562}