?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / tools / perf / util / header.c
blob4246e7447e54a1247aad4e79f3a5de37616ec5ad
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 <stdio.h>
10 #include <stdlib.h>
11 #include <linux/compiler.h>
12 #include <linux/list.h>
13 #include <linux/kernel.h>
14 #include <linux/bitops.h>
15 #include <linux/string.h>
16 #include <linux/stringify.h>
17 #include <linux/zalloc.h>
18 #include <sys/stat.h>
19 #include <sys/utsname.h>
20 #include <linux/time64.h>
21 #include <dirent.h>
22 #include <bpf/libbpf.h>
23 #include <perf/cpumap.h>
24
25 #include "dso.h"
26 #include "evlist.h"
27 #include "evsel.h"
28 #include "util/evsel_fprintf.h"
29 #include "header.h"
30 #include "memswap.h"
31 #include "trace-event.h"
32 #include "session.h"
33 #include "symbol.h"
34 #include "debug.h"
35 #include "cpumap.h"
36 #include "pmu.h"
37 #include "vdso.h"
38 #include "strbuf.h"
39 #include "build-id.h"
40 #include "data.h"
41 #include <api/fs/fs.h>
42 #include "asm/bug.h"
43 #include "tool.h"
44 #include "time-utils.h"
45 #include "units.h"
46 #include "util/util.h" // perf_exe()
47 #include "cputopo.h"
48 #include "bpf-event.h"
49
50 #include <linux/ctype.h>
51 #include <internal/lib.h>
52
53 /*
54 * magic2 = "PERFILE2"
55 * must be a numerical value to let the endianness
56 * determine the memory layout. That way we are able
57 * to detect endianness when reading the perf.data file
58 * back.
59 *
60 * we check for legacy (PERFFILE) format.
61 */
62 static const char *__perf_magic1 = "PERFFILE";
63 static const u64 __perf_magic2 = 0x32454c4946524550ULL;
64 static const u64 __perf_magic2_sw = 0x50455246494c4532ULL;
65
66 #define PERF_MAGIC __perf_magic2
67
68 const char perf_version_string[] = PERF_VERSION;
69
70 struct perf_file_attr {
71 struct perf_event_attr attr;
72 struct perf_file_section ids;
73 };
74
75 void perf_header__set_feat(struct perf_header *header, int feat)
76 {
77 set_bit(feat, header->adds_features);
78 }
79
80 void perf_header__clear_feat(struct perf_header *header, int feat)
81 {
82 clear_bit(feat, header->adds_features);
83 }
84
85 bool perf_header__has_feat(const struct perf_header *header, int feat)
86 {
87 return test_bit(feat, header->adds_features);
88 }
89
90 static int __do_write_fd(struct feat_fd *ff, const void *buf, size_t size)
91 {
92 ssize_t ret = writen(ff->fd, buf, size);
93
94 if (ret != (ssize_t)size)
95 return ret < 0 ? (int)ret : -1;
96 return 0;
97 }
98
99 static int __do_write_buf(struct feat_fd *ff, const void *buf, size_t size)
100 {
101 /* struct perf_event_header::size is u16 */
102 const size_t max_size = 0xffff - sizeof(struct perf_event_header);
103 size_t new_size = ff->size;
104 void *addr;
105
106 if (size + ff->offset > max_size)
107 return -E2BIG;
108
109 while (size > (new_size - ff->offset))
110 new_size <<= 1;
111 new_size = min(max_size, new_size);
112
113 if (ff->size < new_size) {
114 addr = realloc(ff->buf, new_size);
115 if (!addr)
116 return -ENOMEM;
117 ff->buf = addr;
118 ff->size = new_size;
119 }
120
121 memcpy(ff->buf + ff->offset, buf, size);
122 ff->offset += size;
123
124 return 0;
125 }
126
127 /* Return: 0 if succeded, -ERR if failed. */
128 int do_write(struct feat_fd *ff, const void *buf, size_t size)
129 {
130 if (!ff->buf)
131 return __do_write_fd(ff, buf, size);
132 return __do_write_buf(ff, buf, size);
133 }
134
135 /* Return: 0 if succeded, -ERR if failed. */
136 static int do_write_bitmap(struct feat_fd *ff, unsigned long *set, u64 size)
137 {
138 u64 *p = (u64 *) set;
139 int i, ret;
140
141 ret = do_write(ff, &size, sizeof(size));
142 if (ret < 0)
143 return ret;
144
145 for (i = 0; (u64) i < BITS_TO_U64(size); i++) {
146 ret = do_write(ff, p + i, sizeof(*p));
147 if (ret < 0)
148 return ret;
149 }
150
151 return 0;
152 }
153
154 /* Return: 0 if succeded, -ERR if failed. */
155 int write_padded(struct feat_fd *ff, const void *bf,
156 size_t count, size_t count_aligned)
157 {
158 static const char zero_buf[NAME_ALIGN];
159 int err = do_write(ff, bf, count);
160
161 if (!err)
162 err = do_write(ff, zero_buf, count_aligned - count);
163
164 return err;
165 }
166
167 #define string_size(str) \
168 (PERF_ALIGN((strlen(str) + 1), NAME_ALIGN) + sizeof(u32))
169
170 /* Return: 0 if succeded, -ERR if failed. */
171 static int do_write_string(struct feat_fd *ff, const char *str)
172 {
173 u32 len, olen;
174 int ret;
175
176 olen = strlen(str) + 1;
177 len = PERF_ALIGN(olen, NAME_ALIGN);
178
179 /* write len, incl. \0 */
180 ret = do_write(ff, &len, sizeof(len));
181 if (ret < 0)
182 return ret;
183
184 return write_padded(ff, str, olen, len);
185 }
186
187 static int __do_read_fd(struct feat_fd *ff, void *addr, ssize_t size)
188 {
189 ssize_t ret = readn(ff->fd, addr, size);
190
191 if (ret != size)
192 return ret < 0 ? (int)ret : -1;
193 return 0;
194 }
195
196 static int __do_read_buf(struct feat_fd *ff, void *addr, ssize_t size)
197 {
198 if (size > (ssize_t)ff->size - ff->offset)
199 return -1;
200
201 memcpy(addr, ff->buf + ff->offset, size);
202 ff->offset += size;
203
204 return 0;
205
206 }
207
208 static int __do_read(struct feat_fd *ff, void *addr, ssize_t size)
209 {
210 if (!ff->buf)
211 return __do_read_fd(ff, addr, size);
212 return __do_read_buf(ff, addr, size);
213 }
214
215 static int do_read_u32(struct feat_fd *ff, u32 *addr)
216 {
217 int ret;
218
219 ret = __do_read(ff, addr, sizeof(*addr));
220 if (ret)
221 return ret;
222
223 if (ff->ph->needs_swap)
224 *addr = bswap_32(*addr);
225 return 0;
226 }
227
228 static int do_read_u64(struct feat_fd *ff, u64 *addr)
229 {
230 int ret;
231
232 ret = __do_read(ff, addr, sizeof(*addr));
233 if (ret)
234 return ret;
235
236 if (ff->ph->needs_swap)
237 *addr = bswap_64(*addr);
238 return 0;
239 }
240
241 static char *do_read_string(struct feat_fd *ff)
242 {
243 u32 len;
244 char *buf;
245
246 if (do_read_u32(ff, &len))
247 return NULL;
248
249 buf = malloc(len);
250 if (!buf)
251 return NULL;
252
253 if (!__do_read(ff, buf, len)) {
254 /*
255 * strings are padded by zeroes
256 * thus the actual strlen of buf
257 * may be less than len
258 */
259 return buf;
260 }
261
262 free(buf);
263 return NULL;
264 }
265
266 /* Return: 0 if succeded, -ERR if failed. */
267 static int do_read_bitmap(struct feat_fd *ff, unsigned long **pset, u64 *psize)
268 {
269 unsigned long *set;
270 u64 size, *p;
271 int i, ret;
272
273 ret = do_read_u64(ff, &size);
274 if (ret)
275 return ret;
276
277 set = bitmap_alloc(size);
278 if (!set)
279 return -ENOMEM;
280
281 p = (u64 *) set;
282
283 for (i = 0; (u64) i < BITS_TO_U64(size); i++) {
284 ret = do_read_u64(ff, p + i);
285 if (ret < 0) {
286 free(set);
287 return ret;
288 }
289 }
290
291 *pset = set;
292 *psize = size;
293 return 0;
294 }
295
296 static int write_tracing_data(struct feat_fd *ff,
297 struct evlist *evlist)
298 {
299 if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__))
300 return -1;
301
302 return read_tracing_data(ff->fd, &evlist->core.entries);
303 }
304
305 static int write_build_id(struct feat_fd *ff,
306 struct evlist *evlist __maybe_unused)
307 {
308 struct perf_session *session;
309 int err;
310
311 session = container_of(ff->ph, struct perf_session, header);
312
313 if (!perf_session__read_build_ids(session, true))
314 return -1;
315
316 if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__))
317 return -1;
318
319 err = perf_session__write_buildid_table(session, ff);
320 if (err < 0) {
321 pr_debug("failed to write buildid table\n");
322 return err;
323 }
324 perf_session__cache_build_ids(session);
325
326 return 0;
327 }
328
329 static int write_hostname(struct feat_fd *ff,
330 struct evlist *evlist __maybe_unused)
331 {
332 struct utsname uts;
333 int ret;
334
335 ret = uname(&uts);
336 if (ret < 0)
337 return -1;
338
339 return do_write_string(ff, uts.nodename);
340 }
341
342 static int write_osrelease(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.release);
353 }
354
355 static int write_arch(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.machine);
366 }
367
368 static int write_version(struct feat_fd *ff,
369 struct evlist *evlist __maybe_unused)
370 {
371 return do_write_string(ff, perf_version_string);
372 }
373
374 static int __write_cpudesc(struct feat_fd *ff, const char *cpuinfo_proc)
375 {
376 FILE *file;
377 char *buf = NULL;
378 char *s, *p;
379 const char *search = cpuinfo_proc;
380 size_t len = 0;
381 int ret = -1;
382
383 if (!search)
384 return -1;
385
386 file = fopen("/proc/cpuinfo", "r");
387 if (!file)
388 return -1;
389
390 while (getline(&buf, &len, file) > 0) {
391 ret = strncmp(buf, search, strlen(search));
392 if (!ret)
393 break;
394 }
395
396 if (ret) {
397 ret = -1;
398 goto done;
399 }
400
401 s = buf;
402
403 p = strchr(buf, ':');
404 if (p && *(p+1) == ' ' && *(p+2))
405 s = p + 2;
406 p = strchr(s, '\n');
407 if (p)
408 *p = '\0';
409
410 /* squash extra space characters (branding string) */
411 p = s;
412 while (*p) {
413 if (isspace(*p)) {
414 char *r = p + 1;
415 char *q = skip_spaces(r);
416 *p = ' ';
417 if (q != (p+1))
418 while ((*r++ = *q++));
419 }
420 p++;
421 }
422 ret = do_write_string(ff, s);
423 done:
424 free(buf);
425 fclose(file);
426 return ret;
427 }
428
429 static int write_cpudesc(struct feat_fd *ff,
430 struct evlist *evlist __maybe_unused)
431 {
432 #if defined(__powerpc__) || defined(__hppa__) || defined(__sparc__)
433 #define CPUINFO_PROC { "cpu", }
434 #elif defined(__s390__)
435 #define CPUINFO_PROC { "vendor_id", }
436 #elif defined(__sh__)
437 #define CPUINFO_PROC { "cpu type", }
438 #elif defined(__alpha__) || defined(__mips__)
439 #define CPUINFO_PROC { "cpu model", }
440 #elif defined(__arm__)
441 #define CPUINFO_PROC { "model name", "Processor", }
442 #elif defined(__arc__)
443 #define CPUINFO_PROC { "Processor", }
444 #elif defined(__xtensa__)
445 #define CPUINFO_PROC { "core ID", }
446 #else
447 #define CPUINFO_PROC { "model name", }
448 #endif
449 const char *cpuinfo_procs[] = CPUINFO_PROC;
450 #undef CPUINFO_PROC
451 unsigned int i;
452
453 for (i = 0; i < ARRAY_SIZE(cpuinfo_procs); i++) {
454 int ret;
455 ret = __write_cpudesc(ff, cpuinfo_procs[i]);
456 if (ret >= 0)
457 return ret;
458 }
459 return -1;
460 }
461
462
463 static int write_nrcpus(struct feat_fd *ff,
464 struct evlist *evlist __maybe_unused)
465 {
466 long nr;
467 u32 nrc, nra;
468 int ret;
469
470 nrc = cpu__max_present_cpu();
471
472 nr = sysconf(_SC_NPROCESSORS_ONLN);
473 if (nr < 0)
474 return -1;
475
476 nra = (u32)(nr & UINT_MAX);
477
478 ret = do_write(ff, &nrc, sizeof(nrc));
479 if (ret < 0)
480 return ret;
481
482 return do_write(ff, &nra, sizeof(nra));
483 }
484
485 static int write_event_desc(struct feat_fd *ff,
486 struct evlist *evlist)
487 {
488 struct evsel *evsel;
489 u32 nre, nri, sz;
490 int ret;
491
492 nre = evlist->core.nr_entries;
493
494 /*
495 * write number of events
496 */
497 ret = do_write(ff, &nre, sizeof(nre));
498 if (ret < 0)
499 return ret;
500
501 /*
502 * size of perf_event_attr struct
503 */
504 sz = (u32)sizeof(evsel->core.attr);
505 ret = do_write(ff, &sz, sizeof(sz));
506 if (ret < 0)
507 return ret;
508
509 evlist__for_each_entry(evlist, evsel) {
510 ret = do_write(ff, &evsel->core.attr, sz);
511 if (ret < 0)
512 return ret;
513 /*
514 * write number of unique id per event
515 * there is one id per instance of an event
516 *
517 * copy into an nri to be independent of the
518 * type of ids,
519 */
520 nri = evsel->core.ids;
521 ret = do_write(ff, &nri, sizeof(nri));
522 if (ret < 0)
523 return ret;
524
525 /*
526 * write event string as passed on cmdline
527 */
528 ret = do_write_string(ff, perf_evsel__name(evsel));
529 if (ret < 0)
530 return ret;
531 /*
532 * write unique ids for this event
533 */
534 ret = do_write(ff, evsel->core.id, evsel->core.ids * sizeof(u64));
535 if (ret < 0)
536 return ret;
537 }
538 return 0;
539 }
540
541 static int write_cmdline(struct feat_fd *ff,
542 struct evlist *evlist __maybe_unused)
543 {
544 char pbuf[MAXPATHLEN], *buf;
545 int i, ret, n;
546
547 /* actual path to perf binary */
548 buf = perf_exe(pbuf, MAXPATHLEN);
549
550 /* account for binary path */
551 n = perf_env.nr_cmdline + 1;
552
553 ret = do_write(ff, &n, sizeof(n));
554 if (ret < 0)
555 return ret;
556
557 ret = do_write_string(ff, buf);
558 if (ret < 0)
559 return ret;
560
561 for (i = 0 ; i < perf_env.nr_cmdline; i++) {
562 ret = do_write_string(ff, perf_env.cmdline_argv[i]);
563 if (ret < 0)
564 return ret;
565 }
566 return 0;
567 }
568
569
570 static int write_cpu_topology(struct feat_fd *ff,
571 struct evlist *evlist __maybe_unused)
572 {
573 struct cpu_topology *tp;
574 u32 i;
575 int ret, j;
576
577 tp = cpu_topology__new();
578 if (!tp)
579 return -1;
580
581 ret = do_write(ff, &tp->core_sib, sizeof(tp->core_sib));
582 if (ret < 0)
583 goto done;
584
585 for (i = 0; i < tp->core_sib; i++) {
586 ret = do_write_string(ff, tp->core_siblings[i]);
587 if (ret < 0)
588 goto done;
589 }
590 ret = do_write(ff, &tp->thread_sib, sizeof(tp->thread_sib));
591 if (ret < 0)
592 goto done;
593
594 for (i = 0; i < tp->thread_sib; i++) {
595 ret = do_write_string(ff, tp->thread_siblings[i]);
596 if (ret < 0)
597 break;
598 }
599
600 ret = perf_env__read_cpu_topology_map(&perf_env);
601 if (ret < 0)
602 goto done;
603
604 for (j = 0; j < perf_env.nr_cpus_avail; j++) {
605 ret = do_write(ff, &perf_env.cpu[j].core_id,
606 sizeof(perf_env.cpu[j].core_id));
607 if (ret < 0)
608 return ret;
609 ret = do_write(ff, &perf_env.cpu[j].socket_id,
610 sizeof(perf_env.cpu[j].socket_id));
611 if (ret < 0)
612 return ret;
613 }
614
615 if (!tp->die_sib)
616 goto done;
617
618 ret = do_write(ff, &tp->die_sib, sizeof(tp->die_sib));
619 if (ret < 0)
620 goto done;
621
622 for (i = 0; i < tp->die_sib; i++) {
623 ret = do_write_string(ff, tp->die_siblings[i]);
624 if (ret < 0)
625 goto done;
626 }
627
628 for (j = 0; j < perf_env.nr_cpus_avail; j++) {
629 ret = do_write(ff, &perf_env.cpu[j].die_id,
630 sizeof(perf_env.cpu[j].die_id));
631 if (ret < 0)
632 return ret;
633 }
634
635 done:
636 cpu_topology__delete(tp);
637 return ret;
638 }
639
640
641
642 static int write_total_mem(struct feat_fd *ff,
643 struct evlist *evlist __maybe_unused)
644 {
645 char *buf = NULL;
646 FILE *fp;
647 size_t len = 0;
648 int ret = -1, n;
649 uint64_t mem;
650
651 fp = fopen("/proc/meminfo", "r");
652 if (!fp)
653 return -1;
654
655 while (getline(&buf, &len, fp) > 0) {
656 ret = strncmp(buf, "MemTotal:", 9);
657 if (!ret)
658 break;
659 }
660 if (!ret) {
661 n = sscanf(buf, "%*s %"PRIu64, &mem);
662 if (n == 1)
663 ret = do_write(ff, &mem, sizeof(mem));
664 } else
665 ret = -1;
666 free(buf);
667 fclose(fp);
668 return ret;
669 }
670
671 static int write_numa_topology(struct feat_fd *ff,
672 struct evlist *evlist __maybe_unused)
673 {
674 struct numa_topology *tp;
675 int ret = -1;
676 u32 i;
677
678 tp = numa_topology__new();
679 if (!tp)
680 return -ENOMEM;
681
682 ret = do_write(ff, &tp->nr, sizeof(u32));
683 if (ret < 0)
684 goto err;
685
686 for (i = 0; i < tp->nr; i++) {
687 struct numa_topology_node *n = &tp->nodes[i];
688
689 ret = do_write(ff, &n->node, sizeof(u32));
690 if (ret < 0)
691 goto err;
692
693 ret = do_write(ff, &n->mem_total, sizeof(u64));
694 if (ret)
695 goto err;
696
697 ret = do_write(ff, &n->mem_free, sizeof(u64));
698 if (ret)
699 goto err;
700
701 ret = do_write_string(ff, n->cpus);
702 if (ret < 0)
703 goto err;
704 }
705
706 ret = 0;
707
708 err:
709 numa_topology__delete(tp);
710 return ret;
711 }
712
713 /*
714 * File format:
715 *
716 * struct pmu_mappings {
717 * u32 pmu_num;
718 * struct pmu_map {
719 * u32 type;
720 * char name[];
721 * }[pmu_num];
722 * };
723 */
724
725 static int write_pmu_mappings(struct feat_fd *ff,
726 struct evlist *evlist __maybe_unused)
727 {
728 struct perf_pmu *pmu = NULL;
729 u32 pmu_num = 0;
730 int ret;
731
732 /*
733 * Do a first pass to count number of pmu to avoid lseek so this
734 * works in pipe mode as well.
735 */
736 while ((pmu = perf_pmu__scan(pmu))) {
737 if (!pmu->name)
738 continue;
739 pmu_num++;
740 }
741
742 ret = do_write(ff, &pmu_num, sizeof(pmu_num));
743 if (ret < 0)
744 return ret;
745
746 while ((pmu = perf_pmu__scan(pmu))) {
747 if (!pmu->name)
748 continue;
749
750 ret = do_write(ff, &pmu->type, sizeof(pmu->type));
751 if (ret < 0)
752 return ret;
753
754 ret = do_write_string(ff, pmu->name);
755 if (ret < 0)
756 return ret;
757 }
758
759 return 0;
760 }
761
762 /*
763 * File format:
764 *
765 * struct group_descs {
766 * u32 nr_groups;
767 * struct group_desc {
768 * char name[];
769 * u32 leader_idx;
770 * u32 nr_members;
771 * }[nr_groups];
772 * };
773 */
774 static int write_group_desc(struct feat_fd *ff,
775 struct evlist *evlist)
776 {
777 u32 nr_groups = evlist->nr_groups;
778 struct evsel *evsel;
779 int ret;
780
781 ret = do_write(ff, &nr_groups, sizeof(nr_groups));
782 if (ret < 0)
783 return ret;
784
785 evlist__for_each_entry(evlist, evsel) {
786 if (perf_evsel__is_group_leader(evsel) &&
787 evsel->core.nr_members > 1) {
788 const char *name = evsel->group_name ?: "{anon_group}";
789 u32 leader_idx = evsel->idx;
790 u32 nr_members = evsel->core.nr_members;
791
792 ret = do_write_string(ff, name);
793 if (ret < 0)
794 return ret;
795
796 ret = do_write(ff, &leader_idx, sizeof(leader_idx));
797 if (ret < 0)
798 return ret;
799
800 ret = do_write(ff, &nr_members, sizeof(nr_members));
801 if (ret < 0)
802 return ret;
803 }
804 }
805 return 0;
806 }
807
808 /*
809 * Return the CPU id as a raw string.
810 *
811 * Each architecture should provide a more precise id string that
812 * can be use to match the architecture's "mapfile".
813 */
814 char * __weak get_cpuid_str(struct perf_pmu *pmu __maybe_unused)
815 {
816 return NULL;
817 }
818
819 /* Return zero when the cpuid from the mapfile.csv matches the
820 * cpuid string generated on this platform.
821 * Otherwise return non-zero.
822 */
823 int __weak strcmp_cpuid_str(const char *mapcpuid, const char *cpuid)
824 {
825 regex_t re;
826 regmatch_t pmatch[1];
827 int match;
828
829 if (regcomp(&re, mapcpuid, REG_EXTENDED) != 0) {
830 /* Warn unable to generate match particular string. */
831 pr_info("Invalid regular expression %s\n", mapcpuid);
832 return 1;
833 }
834
835 match = !regexec(&re, cpuid, 1, pmatch, 0);
836 regfree(&re);
837 if (match) {
838 size_t match_len = (pmatch[0].rm_eo - pmatch[0].rm_so);
839
840 /* Verify the entire string matched. */
841 if (match_len == strlen(cpuid))
842 return 0;
843 }
844 return 1;
845 }
846
847 /*
848 * default get_cpuid(): nothing gets recorded
849 * actual implementation must be in arch/$(SRCARCH)/util/header.c
850 */
851 int __weak get_cpuid(char *buffer __maybe_unused, size_t sz __maybe_unused)
852 {
853 return ENOSYS; /* Not implemented */
854 }
855
856 static int write_cpuid(struct feat_fd *ff,
857 struct evlist *evlist __maybe_unused)
858 {
859 char buffer[64];
860 int ret;
861
862 ret = get_cpuid(buffer, sizeof(buffer));
863 if (ret)
864 return -1;
865
866 return do_write_string(ff, buffer);
867 }
868
869 static int write_branch_stack(struct feat_fd *ff __maybe_unused,
870 struct evlist *evlist __maybe_unused)
871 {
872 return 0;
873 }
874
875 static int write_auxtrace(struct feat_fd *ff,
876 struct evlist *evlist __maybe_unused)
877 {
878 struct perf_session *session;
879 int err;
880
881 if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__))
882 return -1;
883
884 session = container_of(ff->ph, struct perf_session, header);
885
886 err = auxtrace_index__write(ff->fd, &session->auxtrace_index);
887 if (err < 0)
888 pr_err("Failed to write auxtrace index\n");
889 return err;
890 }
891
892 static int write_clockid(struct feat_fd *ff,
893 struct evlist *evlist __maybe_unused)
894 {
895 return do_write(ff, &ff->ph->env.clockid_res_ns,
896 sizeof(ff->ph->env.clockid_res_ns));
897 }
898
899 static int write_dir_format(struct feat_fd *ff,
900 struct evlist *evlist __maybe_unused)
901 {
902 struct perf_session *session;
903 struct perf_data *data;
904
905 session = container_of(ff->ph, struct perf_session, header);
906 data = session->data;
907
908 if (WARN_ON(!perf_data__is_dir(data)))
909 return -1;
910
911 return do_write(ff, &data->dir.version, sizeof(data->dir.version));
912 }
913
914 #ifdef HAVE_LIBBPF_SUPPORT
915 static int write_bpf_prog_info(struct feat_fd *ff,
916 struct evlist *evlist __maybe_unused)
917 {
918 struct perf_env *env = &ff->ph->env;
919 struct rb_root *root;
920 struct rb_node *next;
921 int ret;
922
923 down_read(&env->bpf_progs.lock);
924
925 ret = do_write(ff, &env->bpf_progs.infos_cnt,
926 sizeof(env->bpf_progs.infos_cnt));
927 if (ret < 0)
928 goto out;
929
930 root = &env->bpf_progs.infos;
931 next = rb_first(root);
932 while (next) {
933 struct bpf_prog_info_node *node;
934 size_t len;
935
936 node = rb_entry(next, struct bpf_prog_info_node, rb_node);
937 next = rb_next(&node->rb_node);
938 len = sizeof(struct bpf_prog_info_linear) +
939 node->info_linear->data_len;
940
941 /* before writing to file, translate address to offset */
942 bpf_program__bpil_addr_to_offs(node->info_linear);
943 ret = do_write(ff, node->info_linear, len);
944 /*
945 * translate back to address even when do_write() fails,
946 * so that this function never changes the data.
947 */
948 bpf_program__bpil_offs_to_addr(node->info_linear);
949 if (ret < 0)
950 goto out;
951 }
952 out:
953 up_read(&env->bpf_progs.lock);
954 return ret;
955 }
956 #else // HAVE_LIBBPF_SUPPORT
957 static int write_bpf_prog_info(struct feat_fd *ff __maybe_unused,
958 struct evlist *evlist __maybe_unused)
959 {
960 return 0;
961 }
962 #endif // HAVE_LIBBPF_SUPPORT
963
964 static int write_bpf_btf(struct feat_fd *ff,
965 struct evlist *evlist __maybe_unused)
966 {
967 struct perf_env *env = &ff->ph->env;
968 struct rb_root *root;
969 struct rb_node *next;
970 int ret;
971
972 down_read(&env->bpf_progs.lock);
973
974 ret = do_write(ff, &env->bpf_progs.btfs_cnt,
975 sizeof(env->bpf_progs.btfs_cnt));
976
977 if (ret < 0)
978 goto out;
979
980 root = &env->bpf_progs.btfs;
981 next = rb_first(root);
982 while (next) {
983 struct btf_node *node;
984
985 node = rb_entry(next, struct btf_node, rb_node);
986 next = rb_next(&node->rb_node);
987 ret = do_write(ff, &node->id,
988 sizeof(u32) * 2 + node->data_size);
989 if (ret < 0)
990 goto out;
991 }
992 out:
993 up_read(&env->bpf_progs.lock);
994 return ret;
995 }
996
997 static int cpu_cache_level__sort(const void *a, const void *b)
998 {
999 struct cpu_cache_level *cache_a = (struct cpu_cache_level *)a;
1000 struct cpu_cache_level *cache_b = (struct cpu_cache_level *)b;
1001
1002 return cache_a->level - cache_b->level;
1003 }
1004
1005 static bool cpu_cache_level__cmp(struct cpu_cache_level *a, struct cpu_cache_level *b)
1006 {
1007 if (a->level != b->level)
1008 return false;
1009
1010 if (a->line_size != b->line_size)
1011 return false;
1012
1013 if (a->sets != b->sets)
1014 return false;
1015
1016 if (a->ways != b->ways)
1017 return false;
1018
1019 if (strcmp(a->type, b->type))
1020 return false;
1021
1022 if (strcmp(a->size, b->size))
1023 return false;
1024
1025 if (strcmp(a->map, b->map))
1026 return false;
1027
1028 return true;
1029 }
1030
1031 static int cpu_cache_level__read(struct cpu_cache_level *cache, u32 cpu, u16 level)
1032 {
1033 char path[PATH_MAX], file[PATH_MAX];
1034 struct stat st;
1035 size_t len;
1036
1037 scnprintf(path, PATH_MAX, "devices/system/cpu/cpu%d/cache/index%d/", cpu, level);
1038 scnprintf(file, PATH_MAX, "%s/%s", sysfs__mountpoint(), path);
1039
1040 if (stat(file, &st))
1041 return 1;
1042
1043 scnprintf(file, PATH_MAX, "%s/level", path);
1044 if (sysfs__read_int(file, (int *) &cache->level))
1045 return -1;
1046
1047 scnprintf(file, PATH_MAX, "%s/coherency_line_size", path);
1048 if (sysfs__read_int(file, (int *) &cache->line_size))
1049 return -1;
1050
1051 scnprintf(file, PATH_MAX, "%s/number_of_sets", path);
1052 if (sysfs__read_int(file, (int *) &cache->sets))
1053 return -1;
1054
1055 scnprintf(file, PATH_MAX, "%s/ways_of_associativity", path);
1056 if (sysfs__read_int(file, (int *) &cache->ways))
1057 return -1;
1058
1059 scnprintf(file, PATH_MAX, "%s/type", path);
1060 if (sysfs__read_str(file, &cache->type, &len))
1061 return -1;
1062
1063 cache->type[len] = 0;
1064 cache->type = strim(cache->type);
1065
1066 scnprintf(file, PATH_MAX, "%s/size", path);
1067 if (sysfs__read_str(file, &cache->size, &len)) {
1068 zfree(&cache->type);
1069 return -1;
1070 }
1071
1072 cache->size[len] = 0;
1073 cache->size = strim(cache->size);
1074
1075 scnprintf(file, PATH_MAX, "%s/shared_cpu_list", path);
1076 if (sysfs__read_str(file, &cache->map, &len)) {
1077 zfree(&cache->size);
1078 zfree(&cache->type);
1079 return -1;
1080 }
1081
1082 cache->map[len] = 0;
1083 cache->map = strim(cache->map);
1084 return 0;
1085 }
1086
1087 static void cpu_cache_level__fprintf(FILE *out, struct cpu_cache_level *c)
1088 {
1089 fprintf(out, "L%d %-15s %8s [%s]\n", c->level, c->type, c->size, c->map);
1090 }
1091
1092 #define MAX_CACHE_LVL 4
1093
1094 static int build_caches(struct cpu_cache_level caches[], u32 *cntp)
1095 {
1096 u32 i, cnt = 0;
1097 u32 nr, cpu;
1098 u16 level;
1099
1100 nr = cpu__max_cpu();
1101
1102 for (cpu = 0; cpu < nr; cpu++) {
1103 for (level = 0; level < MAX_CACHE_LVL; level++) {
1104 struct cpu_cache_level c;
1105 int err;
1106
1107 err = cpu_cache_level__read(&c, cpu, level);
1108 if (err < 0)
1109 return err;
1110
1111 if (err == 1)
1112 break;
1113
1114 for (i = 0; i < cnt; i++) {
1115 if (cpu_cache_level__cmp(&c, &caches[i]))
1116 break;
1117 }
1118
1119 if (i == cnt)
1120 caches[cnt++] = c;
1121 else
1122 cpu_cache_level__free(&c);
1123 }
1124 }
1125 *cntp = cnt;
1126 return 0;
1127 }
1128
1129 static int write_cache(struct feat_fd *ff,
1130 struct evlist *evlist __maybe_unused)
1131 {
1132 u32 max_caches = cpu__max_cpu() * MAX_CACHE_LVL;
1133 struct cpu_cache_level caches[max_caches];
1134 u32 cnt = 0, i, version = 1;
1135 int ret;
1136
1137 ret = build_caches(caches, &cnt);
1138 if (ret)
1139 goto out;
1140
1141 qsort(&caches, cnt, sizeof(struct cpu_cache_level), cpu_cache_level__sort);
1142
1143 ret = do_write(ff, &version, sizeof(u32));
1144 if (ret < 0)
1145 goto out;
1146
1147 ret = do_write(ff, &cnt, sizeof(u32));
1148 if (ret < 0)
1149 goto out;
1150
1151 for (i = 0; i < cnt; i++) {
1152 struct cpu_cache_level *c = &caches[i];
1153
1154 #define _W(v) \
1155 ret = do_write(ff, &c->v, sizeof(u32)); \
1156 if (ret < 0) \
1157 goto out;
1158
1159 _W(level)
1160 _W(line_size)
1161 _W(sets)
1162 _W(ways)
1163 #undef _W
1164
1165 #define _W(v) \
1166 ret = do_write_string(ff, (const char *) c->v); \
1167 if (ret < 0) \
1168 goto out;
1169
1170 _W(type)
1171 _W(size)
1172 _W(map)
1173 #undef _W
1174 }
1175
1176 out:
1177 for (i = 0; i < cnt; i++)
1178 cpu_cache_level__free(&caches[i]);
1179 return ret;
1180 }
1181
1182 static int write_stat(struct feat_fd *ff __maybe_unused,
1183 struct evlist *evlist __maybe_unused)
1184 {
1185 return 0;
1186 }
1187
1188 static int write_sample_time(struct feat_fd *ff,
1189 struct evlist *evlist)
1190 {
1191 int ret;
1192
1193 ret = do_write(ff, &evlist->first_sample_time,
1194 sizeof(evlist->first_sample_time));
1195 if (ret < 0)
1196 return ret;
1197
1198 return do_write(ff, &evlist->last_sample_time,
1199 sizeof(evlist->last_sample_time));
1200 }
1201
1202
1203 static int memory_node__read(struct memory_node *n, unsigned long idx)
1204 {
1205 unsigned int phys, size = 0;
1206 char path[PATH_MAX];
1207 struct dirent *ent;
1208 DIR *dir;
1209
1210 #define for_each_memory(mem, dir) \
1211 while ((ent = readdir(dir))) \
1212 if (strcmp(ent->d_name, ".") && \
1213 strcmp(ent->d_name, "..") && \
1214 sscanf(ent->d_name, "memory%u", &mem) == 1)
1215
1216 scnprintf(path, PATH_MAX,
1217 "%s/devices/system/node/node%lu",
1218 sysfs__mountpoint(), idx);
1219
1220 dir = opendir(path);
1221 if (!dir) {
1222 pr_warning("failed: cant' open memory sysfs data\n");
1223 return -1;
1224 }
1225
1226 for_each_memory(phys, dir) {
1227 size = max(phys, size);
1228 }
1229
1230 size++;
1231
1232 n->set = bitmap_alloc(size);
1233 if (!n->set) {
1234 closedir(dir);
1235 return -ENOMEM;
1236 }
1237
1238 n->node = idx;
1239 n->size = size;
1240
1241 rewinddir(dir);
1242
1243 for_each_memory(phys, dir) {
1244 set_bit(phys, n->set);
1245 }
1246
1247 closedir(dir);
1248 return 0;
1249 }
1250
1251 static int memory_node__sort(const void *a, const void *b)
1252 {
1253 const struct memory_node *na = a;
1254 const struct memory_node *nb = b;
1255
1256 return na->node - nb->node;
1257 }
1258
1259 static int build_mem_topology(struct memory_node *nodes, u64 size, u64 *cntp)
1260 {
1261 char path[PATH_MAX];
1262 struct dirent *ent;
1263 DIR *dir;
1264 u64 cnt = 0;
1265 int ret = 0;
1266
1267 scnprintf(path, PATH_MAX, "%s/devices/system/node/",
1268 sysfs__mountpoint());
1269
1270 dir = opendir(path);
1271 if (!dir) {
1272 pr_debug2("%s: could't read %s, does this arch have topology information?\n",
1273 __func__, path);
1274 return -1;
1275 }
1276
1277 while (!ret && (ent = readdir(dir))) {
1278 unsigned int idx;
1279 int r;
1280
1281 if (!strcmp(ent->d_name, ".") ||
1282 !strcmp(ent->d_name, ".."))
1283 continue;
1284
1285 r = sscanf(ent->d_name, "node%u", &idx);
1286 if (r != 1)
1287 continue;
1288
1289 if (WARN_ONCE(cnt >= size,
1290 "failed to write MEM_TOPOLOGY, way too many nodes\n")) {
1291 closedir(dir);
1292 return -1;
1293 }
1294
1295 ret = memory_node__read(&nodes[cnt++], idx);
1296 }
1297
1298 *cntp = cnt;
1299 closedir(dir);
1300
1301 if (!ret)
1302 qsort(nodes, cnt, sizeof(nodes[0]), memory_node__sort);
1303
1304 return ret;
1305 }
1306
1307 #define MAX_MEMORY_NODES 2000
1308
1309 /*
1310 * The MEM_TOPOLOGY holds physical memory map for every
1311 * node in system. The format of data is as follows:
1312 *
1313 * 0 - version | for future changes
1314 * 8 - block_size_bytes | /sys/devices/system/memory/block_size_bytes
1315 * 16 - count | number of nodes
1316 *
1317 * For each node we store map of physical indexes for
1318 * each node:
1319 *
1320 * 32 - node id | node index
1321 * 40 - size | size of bitmap
1322 * 48 - bitmap | bitmap of memory indexes that belongs to node
1323 */
1324 static int write_mem_topology(struct feat_fd *ff __maybe_unused,
1325 struct evlist *evlist __maybe_unused)
1326 {
1327 static struct memory_node nodes[MAX_MEMORY_NODES];
1328 u64 bsize, version = 1, i, nr;
1329 int ret;
1330
1331 ret = sysfs__read_xll("devices/system/memory/block_size_bytes",
1332 (unsigned long long *) &bsize);
1333 if (ret)
1334 return ret;
1335
1336 ret = build_mem_topology(&nodes[0], MAX_MEMORY_NODES, &nr);
1337 if (ret)
1338 return ret;
1339
1340 ret = do_write(ff, &version, sizeof(version));
1341 if (ret < 0)
1342 goto out;
1343
1344 ret = do_write(ff, &bsize, sizeof(bsize));
1345 if (ret < 0)
1346 goto out;
1347
1348 ret = do_write(ff, &nr, sizeof(nr));
1349 if (ret < 0)
1350 goto out;
1351
1352 for (i = 0; i < nr; i++) {
1353 struct memory_node *n = &nodes[i];
1354
1355 #define _W(v) \
1356 ret = do_write(ff, &n->v, sizeof(n->v)); \
1357 if (ret < 0) \
1358 goto out;
1359
1360 _W(node)
1361 _W(size)
1362
1363 #undef _W
1364
1365 ret = do_write_bitmap(ff, n->set, n->size);
1366 if (ret < 0)
1367 goto out;
1368 }
1369
1370 out:
1371 return ret;
1372 }
1373
1374 static int write_compressed(struct feat_fd *ff __maybe_unused,
1375 struct evlist *evlist __maybe_unused)
1376 {
1377 int ret;
1378
1379 ret = do_write(ff, &(ff->ph->env.comp_ver), sizeof(ff->ph->env.comp_ver));
1380 if (ret)
1381 return ret;
1382
1383 ret = do_write(ff, &(ff->ph->env.comp_type), sizeof(ff->ph->env.comp_type));
1384 if (ret)
1385 return ret;
1386
1387 ret = do_write(ff, &(ff->ph->env.comp_level), sizeof(ff->ph->env.comp_level));
1388 if (ret)
1389 return ret;
1390
1391 ret = do_write(ff, &(ff->ph->env.comp_ratio), sizeof(ff->ph->env.comp_ratio));
1392 if (ret)
1393 return ret;
1394
1395 return do_write(ff, &(ff->ph->env.comp_mmap_len), sizeof(ff->ph->env.comp_mmap_len));
1396 }
1397
1398 static void print_hostname(struct feat_fd *ff, FILE *fp)
1399 {
1400 fprintf(fp, "# hostname : %s\n", ff->ph->env.hostname);
1401 }
1402
1403 static void print_osrelease(struct feat_fd *ff, FILE *fp)
1404 {
1405 fprintf(fp, "# os release : %s\n", ff->ph->env.os_release);
1406 }
1407
1408 static void print_arch(struct feat_fd *ff, FILE *fp)
1409 {
1410 fprintf(fp, "# arch : %s\n", ff->ph->env.arch);
1411 }
1412
1413 static void print_cpudesc(struct feat_fd *ff, FILE *fp)
1414 {
1415 fprintf(fp, "# cpudesc : %s\n", ff->ph->env.cpu_desc);
1416 }
1417
1418 static void print_nrcpus(struct feat_fd *ff, FILE *fp)
1419 {
1420 fprintf(fp, "# nrcpus online : %u\n", ff->ph->env.nr_cpus_online);
1421 fprintf(fp, "# nrcpus avail : %u\n", ff->ph->env.nr_cpus_avail);
1422 }
1423
1424 static void print_version(struct feat_fd *ff, FILE *fp)
1425 {
1426 fprintf(fp, "# perf version : %s\n", ff->ph->env.version);
1427 }
1428
1429 static void print_cmdline(struct feat_fd *ff, FILE *fp)
1430 {
1431 int nr, i;
1432
1433 nr = ff->ph->env.nr_cmdline;
1434
1435 fprintf(fp, "# cmdline : ");
1436
1437 for (i = 0; i < nr; i++) {
1438 char *argv_i = strdup(ff->ph->env.cmdline_argv[i]);
1439 if (!argv_i) {
1440 fprintf(fp, "%s ", ff->ph->env.cmdline_argv[i]);
1441 } else {
1442 char *mem = argv_i;
1443 do {
1444 char *quote = strchr(argv_i, '\'');
1445 if (!quote)
1446 break;
1447 *quote++ = '\0';
1448 fprintf(fp, "%s\\\'", argv_i);
1449 argv_i = quote;
1450 } while (1);
1451 fprintf(fp, "%s ", argv_i);
1452 free(mem);
1453 }
1454 }
1455 fputc('\n', fp);
1456 }
1457
1458 static void print_cpu_topology(struct feat_fd *ff, FILE *fp)
1459 {
1460 struct perf_header *ph = ff->ph;
1461 int cpu_nr = ph->env.nr_cpus_avail;
1462 int nr, i;
1463 char *str;
1464
1465 nr = ph->env.nr_sibling_cores;
1466 str = ph->env.sibling_cores;
1467
1468 for (i = 0; i < nr; i++) {
1469 fprintf(fp, "# sibling sockets : %s\n", str);
1470 str += strlen(str) + 1;
1471 }
1472
1473 if (ph->env.nr_sibling_dies) {
1474 nr = ph->env.nr_sibling_dies;
1475 str = ph->env.sibling_dies;
1476
1477 for (i = 0; i < nr; i++) {
1478 fprintf(fp, "# sibling dies : %s\n", str);
1479 str += strlen(str) + 1;
1480 }
1481 }
1482
1483 nr = ph->env.nr_sibling_threads;
1484 str = ph->env.sibling_threads;
1485
1486 for (i = 0; i < nr; i++) {
1487 fprintf(fp, "# sibling threads : %s\n", str);
1488 str += strlen(str) + 1;
1489 }
1490
1491 if (ph->env.nr_sibling_dies) {
1492 if (ph->env.cpu != NULL) {
1493 for (i = 0; i < cpu_nr; i++)
1494 fprintf(fp, "# CPU %d: Core ID %d, "
1495 "Die ID %d, Socket ID %d\n",
1496 i, ph->env.cpu[i].core_id,
1497 ph->env.cpu[i].die_id,
1498 ph->env.cpu[i].socket_id);
1499 } else
1500 fprintf(fp, "# Core ID, Die ID and Socket ID "
1501 "information is not available\n");
1502 } else {
1503 if (ph->env.cpu != NULL) {
1504 for (i = 0; i < cpu_nr; i++)
1505 fprintf(fp, "# CPU %d: Core ID %d, "
1506 "Socket ID %d\n",
1507 i, ph->env.cpu[i].core_id,
1508 ph->env.cpu[i].socket_id);
1509 } else
1510 fprintf(fp, "# Core ID and Socket ID "
1511 "information is not available\n");
1512 }
1513 }
1514
1515 static void print_clockid(struct feat_fd *ff, FILE *fp)
1516 {
1517 fprintf(fp, "# clockid frequency: %"PRIu64" MHz\n",
1518 ff->ph->env.clockid_res_ns * 1000);
1519 }
1520
1521 static void print_dir_format(struct feat_fd *ff, FILE *fp)
1522 {
1523 struct perf_session *session;
1524 struct perf_data *data;
1525
1526 session = container_of(ff->ph, struct perf_session, header);
1527 data = session->data;
1528
1529 fprintf(fp, "# directory data version : %"PRIu64"\n", data->dir.version);
1530 }
1531
1532 static void print_bpf_prog_info(struct feat_fd *ff, FILE *fp)
1533 {
1534 struct perf_env *env = &ff->ph->env;
1535 struct rb_root *root;
1536 struct rb_node *next;
1537
1538 down_read(&env->bpf_progs.lock);
1539
1540 root = &env->bpf_progs.infos;
1541 next = rb_first(root);
1542
1543 while (next) {
1544 struct bpf_prog_info_node *node;
1545
1546 node = rb_entry(next, struct bpf_prog_info_node, rb_node);
1547 next = rb_next(&node->rb_node);
1548
1549 bpf_event__print_bpf_prog_info(&node->info_linear->info,
1550 env, fp);
1551 }
1552
1553 up_read(&env->bpf_progs.lock);
1554 }
1555
1556 static void print_bpf_btf(struct feat_fd *ff, FILE *fp)
1557 {
1558 struct perf_env *env = &ff->ph->env;
1559 struct rb_root *root;
1560 struct rb_node *next;
1561
1562 down_read(&env->bpf_progs.lock);
1563
1564 root = &env->bpf_progs.btfs;
1565 next = rb_first(root);
1566
1567 while (next) {
1568 struct btf_node *node;
1569
1570 node = rb_entry(next, struct btf_node, rb_node);
1571 next = rb_next(&node->rb_node);
1572 fprintf(fp, "# btf info of id %u\n", node->id);
1573 }
1574
1575 up_read(&env->bpf_progs.lock);
1576 }
1577
1578 static void free_event_desc(struct evsel *events)
1579 {
1580 struct evsel *evsel;
1581
1582 if (!events)
1583 return;
1584
1585 for (evsel = events; evsel->core.attr.size; evsel++) {
1586 zfree(&evsel->name);
1587 zfree(&evsel->core.id);
1588 }
1589
1590 free(events);
1591 }
1592
1593 static struct evsel *read_event_desc(struct feat_fd *ff)
1594 {
1595 struct evsel *evsel, *events = NULL;
1596 u64 *id;
1597 void *buf = NULL;
1598 u32 nre, sz, nr, i, j;
1599 size_t msz;
1600
1601 /* number of events */
1602 if (do_read_u32(ff, &nre))
1603 goto error;
1604
1605 if (do_read_u32(ff, &sz))
1606 goto error;
1607
1608 /* buffer to hold on file attr struct */
1609 buf = malloc(sz);
1610 if (!buf)
1611 goto error;
1612
1613 /* the last event terminates with evsel->core.attr.size == 0: */
1614 events = calloc(nre + 1, sizeof(*events));
1615 if (!events)
1616 goto error;
1617
1618 msz = sizeof(evsel->core.attr);
1619 if (sz < msz)
1620 msz = sz;
1621
1622 for (i = 0, evsel = events; i < nre; evsel++, i++) {
1623 evsel->idx = i;
1624
1625 /*
1626 * must read entire on-file attr struct to
1627 * sync up with layout.
1628 */
1629 if (__do_read(ff, buf, sz))
1630 goto error;
1631
1632 if (ff->ph->needs_swap)
1633 perf_event__attr_swap(buf);
1634
1635 memcpy(&evsel->core.attr, buf, msz);
1636
1637 if (do_read_u32(ff, &nr))
1638 goto error;
1639
1640 if (ff->ph->needs_swap)
1641 evsel->needs_swap = true;
1642
1643 evsel->name = do_read_string(ff);
1644 if (!evsel->name)
1645 goto error;
1646
1647 if (!nr)
1648 continue;
1649
1650 id = calloc(nr, sizeof(*id));
1651 if (!id)
1652 goto error;
1653 evsel->core.ids = nr;
1654 evsel->core.id = id;
1655
1656 for (j = 0 ; j < nr; j++) {
1657 if (do_read_u64(ff, id))
1658 goto error;
1659 id++;
1660 }
1661 }
1662 out:
1663 free(buf);
1664 return events;
1665 error:
1666 free_event_desc(events);
1667 events = NULL;
1668 goto out;
1669 }
1670
1671 static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val,
1672 void *priv __maybe_unused)
1673 {
1674 return fprintf(fp, ", %s = %s", name, val);
1675 }
1676
1677 static void print_event_desc(struct feat_fd *ff, FILE *fp)
1678 {
1679 struct evsel *evsel, *events;
1680 u32 j;
1681 u64 *id;
1682
1683 if (ff->events)
1684 events = ff->events;
1685 else
1686 events = read_event_desc(ff);
1687
1688 if (!events) {
1689 fprintf(fp, "# event desc: not available or unable to read\n");
1690 return;
1691 }
1692
1693 for (evsel = events; evsel->core.attr.size; evsel++) {
1694 fprintf(fp, "# event : name = %s, ", evsel->name);
1695
1696 if (evsel->core.ids) {
1697 fprintf(fp, ", id = {");
1698 for (j = 0, id = evsel->core.id; j < evsel->core.ids; j++, id++) {
1699 if (j)
1700 fputc(',', fp);
1701 fprintf(fp, " %"PRIu64, *id);
1702 }
1703 fprintf(fp, " }");
1704 }
1705
1706 perf_event_attr__fprintf(fp, &evsel->core.attr, __desc_attr__fprintf, NULL);
1707
1708 fputc('\n', fp);
1709 }
1710
1711 free_event_desc(events);
1712 ff->events = NULL;
1713 }
1714
1715 static void print_total_mem(struct feat_fd *ff, FILE *fp)
1716 {
1717 fprintf(fp, "# total memory : %llu kB\n", ff->ph->env.total_mem);
1718 }
1719
1720 static void print_numa_topology(struct feat_fd *ff, FILE *fp)
1721 {
1722 int i;
1723 struct numa_node *n;
1724
1725 for (i = 0; i < ff->ph->env.nr_numa_nodes; i++) {
1726 n = &ff->ph->env.numa_nodes[i];
1727
1728 fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB,"
1729 " free = %"PRIu64" kB\n",
1730 n->node, n->mem_total, n->mem_free);
1731
1732 fprintf(fp, "# node%u cpu list : ", n->node);
1733 cpu_map__fprintf(n->map, fp);
1734 }
1735 }
1736
1737 static void print_cpuid(struct feat_fd *ff, FILE *fp)
1738 {
1739 fprintf(fp, "# cpuid : %s\n", ff->ph->env.cpuid);
1740 }
1741
1742 static void print_branch_stack(struct feat_fd *ff __maybe_unused, FILE *fp)
1743 {
1744 fprintf(fp, "# contains samples with branch stack\n");
1745 }
1746
1747 static void print_auxtrace(struct feat_fd *ff __maybe_unused, FILE *fp)
1748 {
1749 fprintf(fp, "# contains AUX area data (e.g. instruction trace)\n");
1750 }
1751
1752 static void print_stat(struct feat_fd *ff __maybe_unused, FILE *fp)
1753 {
1754 fprintf(fp, "# contains stat data\n");
1755 }
1756
1757 static void print_cache(struct feat_fd *ff, FILE *fp __maybe_unused)
1758 {
1759 int i;
1760
1761 fprintf(fp, "# CPU cache info:\n");
1762 for (i = 0; i < ff->ph->env.caches_cnt; i++) {
1763 fprintf(fp, "# ");
1764 cpu_cache_level__fprintf(fp, &ff->ph->env.caches[i]);
1765 }
1766 }
1767
1768 static void print_compressed(struct feat_fd *ff, FILE *fp)
1769 {
1770 fprintf(fp, "# compressed : %s, level = %d, ratio = %d\n",
1771 ff->ph->env.comp_type == PERF_COMP_ZSTD ? "Zstd" : "Unknown",
1772 ff->ph->env.comp_level, ff->ph->env.comp_ratio);
1773 }
1774
1775 static void print_pmu_mappings(struct feat_fd *ff, FILE *fp)
1776 {
1777 const char *delimiter = "# pmu mappings: ";
1778 char *str, *tmp;
1779 u32 pmu_num;
1780 u32 type;
1781
1782 pmu_num = ff->ph->env.nr_pmu_mappings;
1783 if (!pmu_num) {
1784 fprintf(fp, "# pmu mappings: not available\n");
1785 return;
1786 }
1787
1788 str = ff->ph->env.pmu_mappings;
1789
1790 while (pmu_num) {
1791 type = strtoul(str, &tmp, 0);
1792 if (*tmp != ':')
1793 goto error;
1794
1795 str = tmp + 1;
1796 fprintf(fp, "%s%s = %" PRIu32, delimiter, str, type);
1797
1798 delimiter = ", ";
1799 str += strlen(str) + 1;
1800 pmu_num--;
1801 }
1802
1803 fprintf(fp, "\n");
1804
1805 if (!pmu_num)
1806 return;
1807 error:
1808 fprintf(fp, "# pmu mappings: unable to read\n");
1809 }
1810
1811 static void print_group_desc(struct feat_fd *ff, FILE *fp)
1812 {
1813 struct perf_session *session;
1814 struct evsel *evsel;
1815 u32 nr = 0;
1816
1817 session = container_of(ff->ph, struct perf_session, header);
1818
1819 evlist__for_each_entry(session->evlist, evsel) {
1820 if (perf_evsel__is_group_leader(evsel) &&
1821 evsel->core.nr_members > 1) {
1822 fprintf(fp, "# group: %s{%s", evsel->group_name ?: "",
1823 perf_evsel__name(evsel));
1824
1825 nr = evsel->core.nr_members - 1;
1826 } else if (nr) {
1827 fprintf(fp, ",%s", perf_evsel__name(evsel));
1828
1829 if (--nr == 0)
1830 fprintf(fp, "}\n");
1831 }
1832 }
1833 }
1834
1835 static void print_sample_time(struct feat_fd *ff, FILE *fp)
1836 {
1837 struct perf_session *session;
1838 char time_buf[32];
1839 double d;
1840
1841 session = container_of(ff->ph, struct perf_session, header);
1842
1843 timestamp__scnprintf_usec(session->evlist->first_sample_time,
1844 time_buf, sizeof(time_buf));
1845 fprintf(fp, "# time of first sample : %s\n", time_buf);
1846
1847 timestamp__scnprintf_usec(session->evlist->last_sample_time,
1848 time_buf, sizeof(time_buf));
1849 fprintf(fp, "# time of last sample : %s\n", time_buf);
1850
1851 d = (double)(session->evlist->last_sample_time -
1852 session->evlist->first_sample_time) / NSEC_PER_MSEC;
1853
1854 fprintf(fp, "# sample duration : %10.3f ms\n", d);
1855 }
1856
1857 static void memory_node__fprintf(struct memory_node *n,
1858 unsigned long long bsize, FILE *fp)
1859 {
1860 char buf_map[100], buf_size[50];
1861 unsigned long long size;
1862
1863 size = bsize * bitmap_weight(n->set, n->size);
1864 unit_number__scnprintf(buf_size, 50, size);
1865
1866 bitmap_scnprintf(n->set, n->size, buf_map, 100);
1867 fprintf(fp, "# %3" PRIu64 " [%s]: %s\n", n->node, buf_size, buf_map);
1868 }
1869
1870 static void print_mem_topology(struct feat_fd *ff, FILE *fp)
1871 {
1872 struct memory_node *nodes;
1873 int i, nr;
1874
1875 nodes = ff->ph->env.memory_nodes;
1876 nr = ff->ph->env.nr_memory_nodes;
1877
1878 fprintf(fp, "# memory nodes (nr %d, block size 0x%llx):\n",
1879 nr, ff->ph->env.memory_bsize);
1880
1881 for (i = 0; i < nr; i++) {
1882 memory_node__fprintf(&nodes[i], ff->ph->env.memory_bsize, fp);
1883 }
1884 }
1885
1886 static int __event_process_build_id(struct perf_record_header_build_id *bev,
1887 char *filename,
1888 struct perf_session *session)
1889 {
1890 int err = -1;
1891 struct machine *machine;
1892 u16 cpumode;
1893 struct dso *dso;
1894 enum dso_kernel_type dso_type;
1895
1896 machine = perf_session__findnew_machine(session, bev->pid);
1897 if (!machine)
1898 goto out;
1899
1900 cpumode = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1901
1902 switch (cpumode) {
1903 case PERF_RECORD_MISC_KERNEL:
1904 dso_type = DSO_TYPE_KERNEL;
1905 break;
1906 case PERF_RECORD_MISC_GUEST_KERNEL:
1907 dso_type = DSO_TYPE_GUEST_KERNEL;
1908 break;
1909 case PERF_RECORD_MISC_USER:
1910 case PERF_RECORD_MISC_GUEST_USER:
1911 dso_type = DSO_TYPE_USER;
1912 break;
1913 default:
1914 goto out;
1915 }
1916
1917 dso = machine__findnew_dso(machine, filename);
1918 if (dso != NULL) {
1919 char sbuild_id[SBUILD_ID_SIZE];
1920
1921 dso__set_build_id(dso, &bev->build_id);
1922
1923 if (dso_type != DSO_TYPE_USER) {
1924 struct kmod_path m = { .name = NULL, };
1925
1926 if (!kmod_path__parse_name(&m, filename) && m.kmod)
1927 dso__set_module_info(dso, &m, machine);
1928 else
1929 dso->kernel = dso_type;
1930
1931 free(m.name);
1932 }
1933
1934 build_id__sprintf(dso->build_id, sizeof(dso->build_id),
1935 sbuild_id);
1936 pr_debug("build id event received for %s: %s\n",
1937 dso->long_name, sbuild_id);
1938 dso__put(dso);
1939 }
1940
1941 err = 0;
1942 out:
1943 return err;
1944 }
1945
1946 static int perf_header__read_build_ids_abi_quirk(struct perf_header *header,
1947 int input, u64 offset, u64 size)
1948 {
1949 struct perf_session *session = container_of(header, struct perf_session, header);
1950 struct {
1951 struct perf_event_header header;
1952 u8 build_id[PERF_ALIGN(BUILD_ID_SIZE, sizeof(u64))];
1953 char filename[0];
1954 } old_bev;
1955 struct perf_record_header_build_id bev;
1956 char filename[PATH_MAX];
1957 u64 limit = offset + size;
1958
1959 while (offset < limit) {
1960 ssize_t len;
1961
1962 if (readn(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev))
1963 return -1;
1964
1965 if (header->needs_swap)
1966 perf_event_header__bswap(&old_bev.header);
1967
1968 len = old_bev.header.size - sizeof(old_bev);
1969 if (readn(input, filename, len) != len)
1970 return -1;
1971
1972 bev.header = old_bev.header;
1973
1974 /*
1975 * As the pid is the missing value, we need to fill
1976 * it properly. The header.misc value give us nice hint.
1977 */
1978 bev.pid = HOST_KERNEL_ID;
1979 if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER ||
1980 bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL)
1981 bev.pid = DEFAULT_GUEST_KERNEL_ID;
1982
1983 memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id));
1984 __event_process_build_id(&bev, filename, session);
1985
1986 offset += bev.header.size;
1987 }
1988
1989 return 0;
1990 }
1991
1992 static int perf_header__read_build_ids(struct perf_header *header,
1993 int input, u64 offset, u64 size)
1994 {
1995 struct perf_session *session = container_of(header, struct perf_session, header);
1996 struct perf_record_header_build_id bev;
1997 char filename[PATH_MAX];
1998 u64 limit = offset + size, orig_offset = offset;
1999 int err = -1;
2000
2001 while (offset < limit) {
2002 ssize_t len;
2003
2004 if (readn(input, &bev, sizeof(bev)) != sizeof(bev))
2005 goto out;
2006
2007 if (header->needs_swap)
2008 perf_event_header__bswap(&bev.header);
2009
2010 len = bev.header.size - sizeof(bev);
2011 if (readn(input, filename, len) != len)
2012 goto out;
2013 /*
2014 * The a1645ce1 changeset:
2015 *
2016 * "perf: 'perf kvm' tool for monitoring guest performance from host"
2017 *
2018 * Added a field to struct perf_record_header_build_id that broke the file
2019 * format.
2020 *
2021 * Since the kernel build-id is the first entry, process the
2022 * table using the old format if the well known
2023 * '[kernel.kallsyms]' string for the kernel build-id has the
2024 * first 4 characters chopped off (where the pid_t sits).
2025 */
2026 if (memcmp(filename, "nel.kallsyms]", 13) == 0) {
2027 if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1)
2028 return -1;
2029 return perf_header__read_build_ids_abi_quirk(header, input, offset, size);
2030 }
2031
2032 __event_process_build_id(&bev, filename, session);
2033
2034 offset += bev.header.size;
2035 }
2036 err = 0;
2037 out:
2038 return err;
2039 }
2040
2041 /* Macro for features that simply need to read and store a string. */
2042 #define FEAT_PROCESS_STR_FUN(__feat, __feat_env) \
2043 static int process_##__feat(struct feat_fd *ff, void *data __maybe_unused) \
2044 {\
2045 ff->ph->env.__feat_env = do_read_string(ff); \
2046 return ff->ph->env.__feat_env ? 0 : -ENOMEM; \
2047 }
2048
2049 FEAT_PROCESS_STR_FUN(hostname, hostname);
2050 FEAT_PROCESS_STR_FUN(osrelease, os_release);
2051 FEAT_PROCESS_STR_FUN(version, version);
2052 FEAT_PROCESS_STR_FUN(arch, arch);
2053 FEAT_PROCESS_STR_FUN(cpudesc, cpu_desc);
2054 FEAT_PROCESS_STR_FUN(cpuid, cpuid);
2055
2056 static int process_tracing_data(struct feat_fd *ff, void *data)
2057 {
2058 ssize_t ret = trace_report(ff->fd, data, false);
2059
2060 return ret < 0 ? -1 : 0;
2061 }
2062
2063 static int process_build_id(struct feat_fd *ff, void *data __maybe_unused)
2064 {
2065 if (perf_header__read_build_ids(ff->ph, ff->fd, ff->offset, ff->size))
2066 pr_debug("Failed to read buildids, continuing...\n");
2067 return 0;
2068 }
2069
2070 static int process_nrcpus(struct feat_fd *ff, void *data __maybe_unused)
2071 {
2072 int ret;
2073 u32 nr_cpus_avail, nr_cpus_online;
2074
2075 ret = do_read_u32(ff, &nr_cpus_avail);
2076 if (ret)
2077 return ret;
2078
2079 ret = do_read_u32(ff, &nr_cpus_online);
2080 if (ret)
2081 return ret;
2082 ff->ph->env.nr_cpus_avail = (int)nr_cpus_avail;
2083 ff->ph->env.nr_cpus_online = (int)nr_cpus_online;
2084 return 0;
2085 }
2086
2087 static int process_total_mem(struct feat_fd *ff, void *data __maybe_unused)
2088 {
2089 u64 total_mem;
2090 int ret;
2091
2092 ret = do_read_u64(ff, &total_mem);
2093 if (ret)
2094 return -1;
2095 ff->ph->env.total_mem = (unsigned long long)total_mem;
2096 return 0;
2097 }
2098
2099 static struct evsel *
2100 perf_evlist__find_by_index(struct evlist *evlist, int idx)
2101 {
2102 struct evsel *evsel;
2103
2104 evlist__for_each_entry(evlist, evsel) {
2105 if (evsel->idx == idx)
2106 return evsel;
2107 }
2108
2109 return NULL;
2110 }
2111
2112 static void
2113 perf_evlist__set_event_name(struct evlist *evlist,
2114 struct evsel *event)
2115 {
2116 struct evsel *evsel;
2117
2118 if (!event->name)
2119 return;
2120
2121 evsel = perf_evlist__find_by_index(evlist, event->idx);
2122 if (!evsel)
2123 return;
2124
2125 if (evsel->name)
2126 return;
2127
2128 evsel->name = strdup(event->name);
2129 }
2130
2131 static int
2132 process_event_desc(struct feat_fd *ff, void *data __maybe_unused)
2133 {
2134 struct perf_session *session;
2135 struct evsel *evsel, *events = read_event_desc(ff);
2136
2137 if (!events)
2138 return 0;
2139
2140 session = container_of(ff->ph, struct perf_session, header);
2141
2142 if (session->data->is_pipe) {
2143 /* Save events for reading later by print_event_desc,
2144 * since they can't be read again in pipe mode. */
2145 ff->events = events;
2146 }
2147
2148 for (evsel = events; evsel->core.attr.size; evsel++)
2149 perf_evlist__set_event_name(session->evlist, evsel);
2150
2151 if (!session->data->is_pipe)
2152 free_event_desc(events);
2153
2154 return 0;
2155 }
2156
2157 static int process_cmdline(struct feat_fd *ff, void *data __maybe_unused)
2158 {
2159 char *str, *cmdline = NULL, **argv = NULL;
2160 u32 nr, i, len = 0;
2161
2162 if (do_read_u32(ff, &nr))
2163 return -1;
2164
2165 ff->ph->env.nr_cmdline = nr;
2166
2167 cmdline = zalloc(ff->size + nr + 1);
2168 if (!cmdline)
2169 return -1;
2170
2171 argv = zalloc(sizeof(char *) * (nr + 1));
2172 if (!argv)
2173 goto error;
2174
2175 for (i = 0; i < nr; i++) {
2176 str = do_read_string(ff);
2177 if (!str)
2178 goto error;
2179
2180 argv[i] = cmdline + len;
2181 memcpy(argv[i], str, strlen(str) + 1);
2182 len += strlen(str) + 1;
2183 free(str);
2184 }
2185 ff->ph->env.cmdline = cmdline;
2186 ff->ph->env.cmdline_argv = (const char **) argv;
2187 return 0;
2188
2189 error:
2190 free(argv);
2191 free(cmdline);
2192 return -1;
2193 }
2194
2195 static int process_cpu_topology(struct feat_fd *ff, void *data __maybe_unused)
2196 {
2197 u32 nr, i;
2198 char *str;
2199 struct strbuf sb;
2200 int cpu_nr = ff->ph->env.nr_cpus_avail;
2201 u64 size = 0;
2202 struct perf_header *ph = ff->ph;
2203 bool do_core_id_test = true;
2204
2205 ph->env.cpu = calloc(cpu_nr, sizeof(*ph->env.cpu));
2206 if (!ph->env.cpu)
2207 return -1;
2208
2209 if (do_read_u32(ff, &nr))
2210 goto free_cpu;
2211
2212 ph->env.nr_sibling_cores = nr;
2213 size += sizeof(u32);
2214 if (strbuf_init(&sb, 128) < 0)
2215 goto free_cpu;
2216
2217 for (i = 0; i < nr; i++) {
2218 str = do_read_string(ff);
2219 if (!str)
2220 goto error;
2221
2222 /* include a NULL character at the end */
2223 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
2224 goto error;
2225 size += string_size(str);
2226 free(str);
2227 }
2228 ph->env.sibling_cores = strbuf_detach(&sb, NULL);
2229
2230 if (do_read_u32(ff, &nr))
2231 return -1;
2232
2233 ph->env.nr_sibling_threads = nr;
2234 size += sizeof(u32);
2235
2236 for (i = 0; i < nr; i++) {
2237 str = do_read_string(ff);
2238 if (!str)
2239 goto error;
2240
2241 /* include a NULL character at the end */
2242 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
2243 goto error;
2244 size += string_size(str);
2245 free(str);
2246 }
2247 ph->env.sibling_threads = strbuf_detach(&sb, NULL);
2248
2249 /*
2250 * The header may be from old perf,
2251 * which doesn't include core id and socket id information.
2252 */
2253 if (ff->size <= size) {
2254 zfree(&ph->env.cpu);
2255 return 0;
2256 }
2257
2258 /* On s390 the socket_id number is not related to the numbers of cpus.
2259 * The socket_id number might be higher than the numbers of cpus.
2260 * This depends on the configuration.
2261 * AArch64 is the same.
2262 */
2263 if (ph->env.arch && (!strncmp(ph->env.arch, "s390", 4)
2264 || !strncmp(ph->env.arch, "aarch64", 7)))
2265 do_core_id_test = false;
2266
2267 for (i = 0; i < (u32)cpu_nr; i++) {
2268 if (do_read_u32(ff, &nr))
2269 goto free_cpu;
2270
2271 ph->env.cpu[i].core_id = nr;
2272 size += sizeof(u32);
2273
2274 if (do_read_u32(ff, &nr))
2275 goto free_cpu;
2276
2277 if (do_core_id_test && nr != (u32)-1 && nr > (u32)cpu_nr) {
2278 pr_debug("socket_id number is too big."
2279 "You may need to upgrade the perf tool.\n");
2280 goto free_cpu;
2281 }
2282
2283 ph->env.cpu[i].socket_id = nr;
2284 size += sizeof(u32);
2285 }
2286
2287 /*
2288 * The header may be from old perf,
2289 * which doesn't include die information.
2290 */
2291 if (ff->size <= size)
2292 return 0;
2293
2294 if (do_read_u32(ff, &nr))
2295 return -1;
2296
2297 ph->env.nr_sibling_dies = nr;
2298 size += sizeof(u32);
2299
2300 for (i = 0; i < nr; i++) {
2301 str = do_read_string(ff);
2302 if (!str)
2303 goto error;
2304
2305 /* include a NULL character at the end */
2306 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
2307 goto error;
2308 size += string_size(str);
2309 free(str);
2310 }
2311 ph->env.sibling_dies = strbuf_detach(&sb, NULL);
2312
2313 for (i = 0; i < (u32)cpu_nr; i++) {
2314 if (do_read_u32(ff, &nr))
2315 goto free_cpu;
2316
2317 ph->env.cpu[i].die_id = nr;
2318 }
2319
2320 return 0;
2321
2322 error:
2323 strbuf_release(&sb);
2324 free_cpu:
2325 zfree(&ph->env.cpu);
2326 return -1;
2327 }
2328
2329 static int process_numa_topology(struct feat_fd *ff, void *data __maybe_unused)
2330 {
2331 struct numa_node *nodes, *n;
2332 u32 nr, i;
2333 char *str;
2334
2335 /* nr nodes */
2336 if (do_read_u32(ff, &nr))
2337 return -1;
2338
2339 nodes = zalloc(sizeof(*nodes) * nr);
2340 if (!nodes)
2341 return -ENOMEM;
2342
2343 for (i = 0; i < nr; i++) {
2344 n = &nodes[i];
2345
2346 /* node number */
2347 if (do_read_u32(ff, &n->node))
2348 goto error;
2349
2350 if (do_read_u64(ff, &n->mem_total))
2351 goto error;
2352
2353 if (do_read_u64(ff, &n->mem_free))
2354 goto error;
2355
2356 str = do_read_string(ff);
2357 if (!str)
2358 goto error;
2359
2360 n->map = perf_cpu_map__new(str);
2361 if (!n->map)
2362 goto error;
2363
2364 free(str);
2365 }
2366 ff->ph->env.nr_numa_nodes = nr;
2367 ff->ph->env.numa_nodes = nodes;
2368 return 0;
2369
2370 error:
2371 free(nodes);
2372 return -1;
2373 }
2374
2375 static int process_pmu_mappings(struct feat_fd *ff, void *data __maybe_unused)
2376 {
2377 char *name;
2378 u32 pmu_num;
2379 u32 type;
2380 struct strbuf sb;
2381
2382 if (do_read_u32(ff, &pmu_num))
2383 return -1;
2384
2385 if (!pmu_num) {
2386 pr_debug("pmu mappings not available\n");
2387 return 0;
2388 }
2389
2390 ff->ph->env.nr_pmu_mappings = pmu_num;
2391 if (strbuf_init(&sb, 128) < 0)
2392 return -1;
2393
2394 while (pmu_num) {
2395 if (do_read_u32(ff, &type))
2396 goto error;
2397
2398 name = do_read_string(ff);
2399 if (!name)
2400 goto error;
2401
2402 if (strbuf_addf(&sb, "%u:%s", type, name) < 0)
2403 goto error;
2404 /* include a NULL character at the end */
2405 if (strbuf_add(&sb, "", 1) < 0)
2406 goto error;
2407
2408 if (!strcmp(name, "msr"))
2409 ff->ph->env.msr_pmu_type = type;
2410
2411 free(name);
2412 pmu_num--;
2413 }
2414 ff->ph->env.pmu_mappings = strbuf_detach(&sb, NULL);
2415 return 0;
2416
2417 error:
2418 strbuf_release(&sb);
2419 return -1;
2420 }
2421
2422 static int process_group_desc(struct feat_fd *ff, void *data __maybe_unused)
2423 {
2424 size_t ret = -1;
2425 u32 i, nr, nr_groups;
2426 struct perf_session *session;
2427 struct evsel *evsel, *leader = NULL;
2428 struct group_desc {
2429 char *name;
2430 u32 leader_idx;
2431 u32 nr_members;
2432 } *desc;
2433
2434 if (do_read_u32(ff, &nr_groups))
2435 return -1;
2436
2437 ff->ph->env.nr_groups = nr_groups;
2438 if (!nr_groups) {
2439 pr_debug("group desc not available\n");
2440 return 0;
2441 }
2442
2443 desc = calloc(nr_groups, sizeof(*desc));
2444 if (!desc)
2445 return -1;
2446
2447 for (i = 0; i < nr_groups; i++) {
2448 desc[i].name = do_read_string(ff);
2449 if (!desc[i].name)
2450 goto out_free;
2451
2452 if (do_read_u32(ff, &desc[i].leader_idx))
2453 goto out_free;
2454
2455 if (do_read_u32(ff, &desc[i].nr_members))
2456 goto out_free;
2457 }
2458
2459 /*
2460 * Rebuild group relationship based on the group_desc
2461 */
2462 session = container_of(ff->ph, struct perf_session, header);
2463 session->evlist->nr_groups = nr_groups;
2464
2465 i = nr = 0;
2466 evlist__for_each_entry(session->evlist, evsel) {
2467 if (evsel->idx == (int) desc[i].leader_idx) {
2468 evsel->leader = evsel;
2469 /* {anon_group} is a dummy name */
2470 if (strcmp(desc[i].name, "{anon_group}")) {
2471 evsel->group_name = desc[i].name;
2472 desc[i].name = NULL;
2473 }
2474 evsel->core.nr_members = desc[i].nr_members;
2475
2476 if (i >= nr_groups || nr > 0) {
2477 pr_debug("invalid group desc\n");
2478 goto out_free;
2479 }
2480
2481 leader = evsel;
2482 nr = evsel->core.nr_members - 1;
2483 i++;
2484 } else if (nr) {
2485 /* This is a group member */
2486 evsel->leader = leader;
2487
2488 nr--;
2489 }
2490 }
2491
2492 if (i != nr_groups || nr != 0) {
2493 pr_debug("invalid group desc\n");
2494 goto out_free;
2495 }
2496
2497 ret = 0;
2498 out_free:
2499 for (i = 0; i < nr_groups; i++)
2500 zfree(&desc[i].name);
2501 free(desc);
2502
2503 return ret;
2504 }
2505
2506 static int process_auxtrace(struct feat_fd *ff, void *data __maybe_unused)
2507 {
2508 struct perf_session *session;
2509 int err;
2510
2511 session = container_of(ff->ph, struct perf_session, header);
2512
2513 err = auxtrace_index__process(ff->fd, ff->size, session,
2514 ff->ph->needs_swap);
2515 if (err < 0)
2516 pr_err("Failed to process auxtrace index\n");
2517 return err;
2518 }
2519
2520 static int process_cache(struct feat_fd *ff, void *data __maybe_unused)
2521 {
2522 struct cpu_cache_level *caches;
2523 u32 cnt, i, version;
2524
2525 if (do_read_u32(ff, &version))
2526 return -1;
2527
2528 if (version != 1)
2529 return -1;
2530
2531 if (do_read_u32(ff, &cnt))
2532 return -1;
2533
2534 caches = zalloc(sizeof(*caches) * cnt);
2535 if (!caches)
2536 return -1;
2537
2538 for (i = 0; i < cnt; i++) {
2539 struct cpu_cache_level c;
2540
2541 #define _R(v) \
2542 if (do_read_u32(ff, &c.v))\
2543 goto out_free_caches; \
2544
2545 _R(level)
2546 _R(line_size)
2547 _R(sets)
2548 _R(ways)
2549 #undef _R
2550
2551 #define _R(v) \
2552 c.v = do_read_string(ff); \
2553 if (!c.v) \
2554 goto out_free_caches;
2555
2556 _R(type)
2557 _R(size)
2558 _R(map)
2559 #undef _R
2560
2561 caches[i] = c;
2562 }
2563
2564 ff->ph->env.caches = caches;
2565 ff->ph->env.caches_cnt = cnt;
2566 return 0;
2567 out_free_caches:
2568 free(caches);
2569 return -1;
2570 }
2571
2572 static int process_sample_time(struct feat_fd *ff, void *data __maybe_unused)
2573 {
2574 struct perf_session *session;
2575 u64 first_sample_time, last_sample_time;
2576 int ret;
2577
2578 session = container_of(ff->ph, struct perf_session, header);
2579
2580 ret = do_read_u64(ff, &first_sample_time);
2581 if (ret)
2582 return -1;
2583
2584 ret = do_read_u64(ff, &last_sample_time);
2585 if (ret)
2586 return -1;
2587
2588 session->evlist->first_sample_time = first_sample_time;
2589 session->evlist->last_sample_time = last_sample_time;
2590 return 0;
2591 }
2592
2593 static int process_mem_topology(struct feat_fd *ff,
2594 void *data __maybe_unused)
2595 {
2596 struct memory_node *nodes;
2597 u64 version, i, nr, bsize;
2598 int ret = -1;
2599
2600 if (do_read_u64(ff, &version))
2601 return -1;
2602
2603 if (version != 1)
2604 return -1;
2605
2606 if (do_read_u64(ff, &bsize))
2607 return -1;
2608
2609 if (do_read_u64(ff, &nr))
2610 return -1;
2611
2612 nodes = zalloc(sizeof(*nodes) * nr);
2613 if (!nodes)
2614 return -1;
2615
2616 for (i = 0; i < nr; i++) {
2617 struct memory_node n;
2618
2619 #define _R(v) \
2620 if (do_read_u64(ff, &n.v)) \
2621 goto out; \
2622
2623 _R(node)
2624 _R(size)
2625
2626 #undef _R
2627
2628 if (do_read_bitmap(ff, &n.set, &n.size))
2629 goto out;
2630
2631 nodes[i] = n;
2632 }
2633
2634 ff->ph->env.memory_bsize = bsize;
2635 ff->ph->env.memory_nodes = nodes;
2636 ff->ph->env.nr_memory_nodes = nr;
2637 ret = 0;
2638
2639 out:
2640 if (ret)
2641 free(nodes);
2642 return ret;
2643 }
2644
2645 static int process_clockid(struct feat_fd *ff,
2646 void *data __maybe_unused)
2647 {
2648 if (do_read_u64(ff, &ff->ph->env.clockid_res_ns))
2649 return -1;
2650
2651 return 0;
2652 }
2653
2654 static int process_dir_format(struct feat_fd *ff,
2655 void *_data __maybe_unused)
2656 {
2657 struct perf_session *session;
2658 struct perf_data *data;
2659
2660 session = container_of(ff->ph, struct perf_session, header);
2661 data = session->data;
2662
2663 if (WARN_ON(!perf_data__is_dir(data)))
2664 return -1;
2665
2666 return do_read_u64(ff, &data->dir.version);
2667 }
2668
2669 #ifdef HAVE_LIBBPF_SUPPORT
2670 static int process_bpf_prog_info(struct feat_fd *ff, void *data __maybe_unused)
2671 {
2672 struct bpf_prog_info_linear *info_linear;
2673 struct bpf_prog_info_node *info_node;
2674 struct perf_env *env = &ff->ph->env;
2675 u32 count, i;
2676 int err = -1;
2677
2678 if (ff->ph->needs_swap) {
2679 pr_warning("interpreting bpf_prog_info from systems with endianity is not yet supported\n");
2680 return 0;
2681 }
2682
2683 if (do_read_u32(ff, &count))
2684 return -1;
2685
2686 down_write(&env->bpf_progs.lock);
2687
2688 for (i = 0; i < count; ++i) {
2689 u32 info_len, data_len;
2690
2691 info_linear = NULL;
2692 info_node = NULL;
2693 if (do_read_u32(ff, &info_len))
2694 goto out;
2695 if (do_read_u32(ff, &data_len))
2696 goto out;
2697
2698 if (info_len > sizeof(struct bpf_prog_info)) {
2699 pr_warning("detected invalid bpf_prog_info\n");
2700 goto out;
2701 }
2702
2703 info_linear = malloc(sizeof(struct bpf_prog_info_linear) +
2704 data_len);
2705 if (!info_linear)
2706 goto out;
2707 info_linear->info_len = sizeof(struct bpf_prog_info);
2708 info_linear->data_len = data_len;
2709 if (do_read_u64(ff, (u64 *)(&info_linear->arrays)))
2710 goto out;
2711 if (__do_read(ff, &info_linear->info, info_len))
2712 goto out;
2713 if (info_len < sizeof(struct bpf_prog_info))
2714 memset(((void *)(&info_linear->info)) + info_len, 0,
2715 sizeof(struct bpf_prog_info) - info_len);
2716
2717 if (__do_read(ff, info_linear->data, data_len))
2718 goto out;
2719
2720 info_node = malloc(sizeof(struct bpf_prog_info_node));
2721 if (!info_node)
2722 goto out;
2723
2724 /* after reading from file, translate offset to address */
2725 bpf_program__bpil_offs_to_addr(info_linear);
2726 info_node->info_linear = info_linear;
2727 perf_env__insert_bpf_prog_info(env, info_node);
2728 }
2729
2730 up_write(&env->bpf_progs.lock);
2731 return 0;
2732 out:
2733 free(info_linear);
2734 free(info_node);
2735 up_write(&env->bpf_progs.lock);
2736 return err;
2737 }
2738 #else // HAVE_LIBBPF_SUPPORT
2739 static int process_bpf_prog_info(struct feat_fd *ff __maybe_unused, void *data __maybe_unused)
2740 {
2741 return 0;
2742 }
2743 #endif // HAVE_LIBBPF_SUPPORT
2744
2745 static int process_bpf_btf(struct feat_fd *ff, void *data __maybe_unused)
2746 {
2747 struct perf_env *env = &ff->ph->env;
2748 struct btf_node *node = NULL;
2749 u32 count, i;
2750 int err = -1;
2751
2752 if (ff->ph->needs_swap) {
2753 pr_warning("interpreting btf from systems with endianity is not yet supported\n");
2754 return 0;
2755 }
2756
2757 if (do_read_u32(ff, &count))
2758 return -1;
2759
2760 down_write(&env->bpf_progs.lock);
2761
2762 for (i = 0; i < count; ++i) {
2763 u32 id, data_size;
2764
2765 if (do_read_u32(ff, &id))
2766 goto out;
2767 if (do_read_u32(ff, &data_size))
2768 goto out;
2769
2770 node = malloc(sizeof(struct btf_node) + data_size);
2771 if (!node)
2772 goto out;
2773
2774 node->id = id;
2775 node->data_size = data_size;
2776
2777 if (__do_read(ff, node->data, data_size))
2778 goto out;
2779
2780 perf_env__insert_btf(env, node);
2781 node = NULL;
2782 }
2783
2784 err = 0;
2785 out:
2786 up_write(&env->bpf_progs.lock);
2787 free(node);
2788 return err;
2789 }
2790
2791 static int process_compressed(struct feat_fd *ff,
2792 void *data __maybe_unused)
2793 {
2794 if (do_read_u32(ff, &(ff->ph->env.comp_ver)))
2795 return -1;
2796
2797 if (do_read_u32(ff, &(ff->ph->env.comp_type)))
2798 return -1;
2799
2800 if (do_read_u32(ff, &(ff->ph->env.comp_level)))
2801 return -1;
2802
2803 if (do_read_u32(ff, &(ff->ph->env.comp_ratio)))
2804 return -1;
2805
2806 if (do_read_u32(ff, &(ff->ph->env.comp_mmap_len)))
2807 return -1;
2808
2809 return 0;
2810 }
2811
2812 #define FEAT_OPR(n, func, __full_only) \
2813 [HEADER_##n] = { \
2814 .name = __stringify(n), \
2815 .write = write_##func, \
2816 .print = print_##func, \
2817 .full_only = __full_only, \
2818 .process = process_##func, \
2819 .synthesize = true \
2820 }
2821
2822 #define FEAT_OPN(n, func, __full_only) \
2823 [HEADER_##n] = { \
2824 .name = __stringify(n), \
2825 .write = write_##func, \
2826 .print = print_##func, \
2827 .full_only = __full_only, \
2828 .process = process_##func \
2829 }
2830
2831 /* feature_ops not implemented: */
2832 #define print_tracing_data NULL
2833 #define print_build_id NULL
2834
2835 #define process_branch_stack NULL
2836 #define process_stat NULL
2837
2838 // Only used in util/synthetic-events.c
2839 const struct perf_header_feature_ops feat_ops[HEADER_LAST_FEATURE];
2840
2841 const struct perf_header_feature_ops feat_ops[HEADER_LAST_FEATURE] = {
2842 FEAT_OPN(TRACING_DATA, tracing_data, false),
2843 FEAT_OPN(BUILD_ID, build_id, false),
2844 FEAT_OPR(HOSTNAME, hostname, false),
2845 FEAT_OPR(OSRELEASE, osrelease, false),
2846 FEAT_OPR(VERSION, version, false),
2847 FEAT_OPR(ARCH, arch, false),
2848 FEAT_OPR(NRCPUS, nrcpus, false),
2849 FEAT_OPR(CPUDESC, cpudesc, false),
2850 FEAT_OPR(CPUID, cpuid, false),
2851 FEAT_OPR(TOTAL_MEM, total_mem, false),
2852 FEAT_OPR(EVENT_DESC, event_desc, false),
2853 FEAT_OPR(CMDLINE, cmdline, false),
2854 FEAT_OPR(CPU_TOPOLOGY, cpu_topology, true),
2855 FEAT_OPR(NUMA_TOPOLOGY, numa_topology, true),
2856 FEAT_OPN(BRANCH_STACK, branch_stack, false),
2857 FEAT_OPR(PMU_MAPPINGS, pmu_mappings, false),
2858 FEAT_OPR(GROUP_DESC, group_desc, false),
2859 FEAT_OPN(AUXTRACE, auxtrace, false),
2860 FEAT_OPN(STAT, stat, false),
2861 FEAT_OPN(CACHE, cache, true),
2862 FEAT_OPR(SAMPLE_TIME, sample_time, false),
2863 FEAT_OPR(MEM_TOPOLOGY, mem_topology, true),
2864 FEAT_OPR(CLOCKID, clockid, false),
2865 FEAT_OPN(DIR_FORMAT, dir_format, false),
2866 FEAT_OPR(BPF_PROG_INFO, bpf_prog_info, false),
2867 FEAT_OPR(BPF_BTF, bpf_btf, false),
2868 FEAT_OPR(COMPRESSED, compressed, false),
2869 };
2870
2871 struct header_print_data {
2872 FILE *fp;
2873 bool full; /* extended list of headers */
2874 };
2875
2876 static int perf_file_section__fprintf_info(struct perf_file_section *section,
2877 struct perf_header *ph,
2878 int feat, int fd, void *data)
2879 {
2880 struct header_print_data *hd = data;
2881 struct feat_fd ff;
2882
2883 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
2884 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
2885 "%d, continuing...\n", section->offset, feat);
2886 return 0;
2887 }
2888 if (feat >= HEADER_LAST_FEATURE) {
2889 pr_warning("unknown feature %d\n", feat);
2890 return 0;
2891 }
2892 if (!feat_ops[feat].print)
2893 return 0;
2894
2895 ff = (struct feat_fd) {
2896 .fd = fd,
2897 .ph = ph,
2898 };
2899
2900 if (!feat_ops[feat].full_only || hd->full)
2901 feat_ops[feat].print(&ff, hd->fp);
2902 else
2903 fprintf(hd->fp, "# %s info available, use -I to display\n",
2904 feat_ops[feat].name);
2905
2906 return 0;
2907 }
2908
2909 int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
2910 {
2911 struct header_print_data hd;
2912 struct perf_header *header = &session->header;
2913 int fd = perf_data__fd(session->data);
2914 struct stat st;
2915 time_t stctime;
2916 int ret, bit;
2917
2918 hd.fp = fp;
2919 hd.full = full;
2920
2921 ret = fstat(fd, &st);
2922 if (ret == -1)
2923 return -1;
2924
2925 stctime = st.st_mtime;
2926 fprintf(fp, "# captured on : %s", ctime(&stctime));
2927
2928 fprintf(fp, "# header version : %u\n", header->version);
2929 fprintf(fp, "# data offset : %" PRIu64 "\n", header->data_offset);
2930 fprintf(fp, "# data size : %" PRIu64 "\n", header->data_size);
2931 fprintf(fp, "# feat offset : %" PRIu64 "\n", header->feat_offset);
2932
2933 perf_header__process_sections(header, fd, &hd,
2934 perf_file_section__fprintf_info);
2935
2936 if (session->data->is_pipe)
2937 return 0;
2938
2939 fprintf(fp, "# missing features: ");
2940 for_each_clear_bit(bit, header->adds_features, HEADER_LAST_FEATURE) {
2941 if (bit)
2942 fprintf(fp, "%s ", feat_ops[bit].name);
2943 }
2944
2945 fprintf(fp, "\n");
2946 return 0;
2947 }
2948
2949 static int do_write_feat(struct feat_fd *ff, int type,
2950 struct perf_file_section **p,
2951 struct evlist *evlist)
2952 {
2953 int err;
2954 int ret = 0;
2955
2956 if (perf_header__has_feat(ff->ph, type)) {
2957 if (!feat_ops[type].write)
2958 return -1;
2959
2960 if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__))
2961 return -1;
2962
2963 (*p)->offset = lseek(ff->fd, 0, SEEK_CUR);
2964
2965 err = feat_ops[type].write(ff, evlist);
2966 if (err < 0) {
2967 pr_debug("failed to write feature %s\n", feat_ops[type].name);
2968
2969 /* undo anything written */
2970 lseek(ff->fd, (*p)->offset, SEEK_SET);
2971
2972 return -1;
2973 }
2974 (*p)->size = lseek(ff->fd, 0, SEEK_CUR) - (*p)->offset;
2975 (*p)++;
2976 }
2977 return ret;
2978 }
2979
2980 static int perf_header__adds_write(struct perf_header *header,
2981 struct evlist *evlist, int fd)
2982 {
2983 int nr_sections;
2984 struct feat_fd ff;
2985 struct perf_file_section *feat_sec, *p;
2986 int sec_size;
2987 u64 sec_start;
2988 int feat;
2989 int err;
2990
2991 ff = (struct feat_fd){
2992 .fd = fd,
2993 .ph = header,
2994 };
2995
2996 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
2997 if (!nr_sections)
2998 return 0;
2999
3000 feat_sec = p = calloc(nr_sections, sizeof(*feat_sec));
3001 if (feat_sec == NULL)
3002 return -ENOMEM;
3003
3004 sec_size = sizeof(*feat_sec) * nr_sections;
3005
3006 sec_start = header->feat_offset;
3007 lseek(fd, sec_start + sec_size, SEEK_SET);
3008
3009 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
3010 if (do_write_feat(&ff, feat, &p, evlist))
3011 perf_header__clear_feat(header, feat);
3012 }
3013
3014 lseek(fd, sec_start, SEEK_SET);
3015 /*
3016 * may write more than needed due to dropped feature, but
3017 * this is okay, reader will skip the missing entries
3018 */
3019 err = do_write(&ff, feat_sec, sec_size);
3020 if (err < 0)
3021 pr_debug("failed to write feature section\n");
3022 free(feat_sec);
3023 return err;
3024 }
3025
3026 int perf_header__write_pipe(int fd)
3027 {
3028 struct perf_pipe_file_header f_header;
3029 struct feat_fd ff;
3030 int err;
3031
3032 ff = (struct feat_fd){ .fd = fd };
3033
3034 f_header = (struct perf_pipe_file_header){
3035 .magic = PERF_MAGIC,
3036 .size = sizeof(f_header),
3037 };
3038
3039 err = do_write(&ff, &f_header, sizeof(f_header));
3040 if (err < 0) {
3041 pr_debug("failed to write perf pipe header\n");
3042 return err;
3043 }
3044
3045 return 0;
3046 }
3047
3048 int perf_session__write_header(struct perf_session *session,
3049 struct evlist *evlist,
3050 int fd, bool at_exit)
3051 {
3052 struct perf_file_header f_header;
3053 struct perf_file_attr f_attr;
3054 struct perf_header *header = &session->header;
3055 struct evsel *evsel;
3056 struct feat_fd ff;
3057 u64 attr_offset;
3058 int err;
3059
3060 ff = (struct feat_fd){ .fd = fd};
3061 lseek(fd, sizeof(f_header), SEEK_SET);
3062
3063 evlist__for_each_entry(session->evlist, evsel) {
3064 evsel->id_offset = lseek(fd, 0, SEEK_CUR);
3065 err = do_write(&ff, evsel->core.id, evsel->core.ids * sizeof(u64));
3066 if (err < 0) {
3067 pr_debug("failed to write perf header\n");
3068 return err;
3069 }
3070 }
3071
3072 attr_offset = lseek(ff.fd, 0, SEEK_CUR);
3073
3074 evlist__for_each_entry(evlist, evsel) {
3075 f_attr = (struct perf_file_attr){
3076 .attr = evsel->core.attr,
3077 .ids = {
3078 .offset = evsel->id_offset,
3079 .size = evsel->core.ids * sizeof(u64),
3080 }
3081 };
3082 err = do_write(&ff, &f_attr, sizeof(f_attr));
3083 if (err < 0) {
3084 pr_debug("failed to write perf header attribute\n");
3085 return err;
3086 }
3087 }
3088
3089 if (!header->data_offset)
3090 header->data_offset = lseek(fd, 0, SEEK_CUR);
3091 header->feat_offset = header->data_offset + header->data_size;
3092
3093 if (at_exit) {
3094 err = perf_header__adds_write(header, evlist, fd);
3095 if (err < 0)
3096 return err;
3097 }
3098
3099 f_header = (struct perf_file_header){
3100 .magic = PERF_MAGIC,
3101 .size = sizeof(f_header),
3102 .attr_size = sizeof(f_attr),
3103 .attrs = {
3104 .offset = attr_offset,
3105 .size = evlist->core.nr_entries * sizeof(f_attr),
3106 },
3107 .data = {
3108 .offset = header->data_offset,
3109 .size = header->data_size,
3110 },
3111 /* event_types is ignored, store zeros */
3112 };
3113
3114 memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features));
3115
3116 lseek(fd, 0, SEEK_SET);
3117 err = do_write(&ff, &f_header, sizeof(f_header));
3118 if (err < 0) {
3119 pr_debug("failed to write perf header\n");
3120 return err;
3121 }
3122 lseek(fd, header->data_offset + header->data_size, SEEK_SET);
3123
3124 return 0;
3125 }
3126
3127 static int perf_header__getbuffer64(struct perf_header *header,
3128 int fd, void *buf, size_t size)
3129 {
3130 if (readn(fd, buf, size) <= 0)
3131 return -1;
3132
3133 if (header->needs_swap)
3134 mem_bswap_64(buf, size);
3135
3136 return 0;
3137 }
3138
3139 int perf_header__process_sections(struct perf_header *header, int fd,
3140 void *data,
3141 int (*process)(struct perf_file_section *section,
3142 struct perf_header *ph,
3143 int feat, int fd, void *data))
3144 {
3145 struct perf_file_section *feat_sec, *sec;
3146 int nr_sections;
3147 int sec_size;
3148 int feat;
3149 int err;
3150
3151 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
3152 if (!nr_sections)
3153 return 0;
3154
3155 feat_sec = sec = calloc(nr_sections, sizeof(*feat_sec));
3156 if (!feat_sec)
3157 return -1;
3158
3159 sec_size = sizeof(*feat_sec) * nr_sections;
3160
3161 lseek(fd, header->feat_offset, SEEK_SET);
3162
3163 err = perf_header__getbuffer64(header, fd, feat_sec, sec_size);
3164 if (err < 0)
3165 goto out_free;
3166
3167 for_each_set_bit(feat, header->adds_features, HEADER_LAST_FEATURE) {
3168 err = process(sec++, header, feat, fd, data);
3169 if (err < 0)
3170 goto out_free;
3171 }
3172 err = 0;
3173 out_free:
3174 free(feat_sec);
3175 return err;
3176 }
3177
3178 static const int attr_file_abi_sizes[] = {
3179 [0] = PERF_ATTR_SIZE_VER0,
3180 [1] = PERF_ATTR_SIZE_VER1,
3181 [2] = PERF_ATTR_SIZE_VER2,
3182 [3] = PERF_ATTR_SIZE_VER3,
3183 [4] = PERF_ATTR_SIZE_VER4,
3184 0,
3185 };
3186
3187 /*
3188 * In the legacy file format, the magic number is not used to encode endianness.
3189 * hdr_sz was used to encode endianness. But given that hdr_sz can vary based
3190 * on ABI revisions, we need to try all combinations for all endianness to
3191 * detect the endianness.
3192 */
3193 static int try_all_file_abis(uint64_t hdr_sz, struct perf_header *ph)
3194 {
3195 uint64_t ref_size, attr_size;
3196 int i;
3197
3198 for (i = 0 ; attr_file_abi_sizes[i]; i++) {
3199 ref_size = attr_file_abi_sizes[i]
3200 + sizeof(struct perf_file_section);
3201 if (hdr_sz != ref_size) {
3202 attr_size = bswap_64(hdr_sz);
3203 if (attr_size != ref_size)
3204 continue;
3205
3206 ph->needs_swap = true;
3207 }
3208 pr_debug("ABI%d perf.data file detected, need_swap=%d\n",
3209 i,
3210 ph->needs_swap);
3211 return 0;
3212 }
3213 /* could not determine endianness */
3214 return -1;
3215 }
3216
3217 #define PERF_PIPE_HDR_VER0 16
3218
3219 static const size_t attr_pipe_abi_sizes[] = {
3220 [0] = PERF_PIPE_HDR_VER0,
3221 0,
3222 };
3223
3224 /*
3225 * In the legacy pipe format, there is an implicit assumption that endiannesss
3226 * between host recording the samples, and host parsing the samples is the
3227 * same. This is not always the case given that the pipe output may always be
3228 * redirected into a file and analyzed on a different machine with possibly a
3229 * different endianness and perf_event ABI revsions in the perf tool itself.
3230 */
3231 static int try_all_pipe_abis(uint64_t hdr_sz, struct perf_header *ph)
3232 {
3233 u64 attr_size;
3234 int i;
3235
3236 for (i = 0 ; attr_pipe_abi_sizes[i]; i++) {
3237 if (hdr_sz != attr_pipe_abi_sizes[i]) {
3238 attr_size = bswap_64(hdr_sz);
3239 if (attr_size != hdr_sz)
3240 continue;
3241
3242 ph->needs_swap = true;
3243 }
3244 pr_debug("Pipe ABI%d perf.data file detected\n", i);
3245 return 0;
3246 }
3247 return -1;
3248 }
3249
3250 bool is_perf_magic(u64 magic)
3251 {
3252 if (!memcmp(&magic, __perf_magic1, sizeof(magic))
3253 || magic == __perf_magic2
3254 || magic == __perf_magic2_sw)
3255 return true;
3256
3257 return false;
3258 }
3259
3260 static int check_magic_endian(u64 magic, uint64_t hdr_sz,
3261 bool is_pipe, struct perf_header *ph)
3262 {
3263 int ret;
3264
3265 /* check for legacy format */
3266 ret = memcmp(&magic, __perf_magic1, sizeof(magic));
3267 if (ret == 0) {
3268 ph->version = PERF_HEADER_VERSION_1;
3269 pr_debug("legacy perf.data format\n");
3270 if (is_pipe)
3271 return try_all_pipe_abis(hdr_sz, ph);
3272
3273 return try_all_file_abis(hdr_sz, ph);
3274 }
3275 /*
3276 * the new magic number serves two purposes:
3277 * - unique number to identify actual perf.data files
3278 * - encode endianness of file
3279 */
3280 ph->version = PERF_HEADER_VERSION_2;
3281
3282 /* check magic number with one endianness */
3283 if (magic == __perf_magic2)
3284 return 0;
3285
3286 /* check magic number with opposite endianness */
3287 if (magic != __perf_magic2_sw)
3288 return -1;
3289
3290 ph->needs_swap = true;
3291
3292 return 0;
3293 }
3294
3295 int perf_file_header__read(struct perf_file_header *header,
3296 struct perf_header *ph, int fd)
3297 {
3298 ssize_t ret;
3299
3300 lseek(fd, 0, SEEK_SET);
3301
3302 ret = readn(fd, header, sizeof(*header));
3303 if (ret <= 0)
3304 return -1;
3305
3306 if (check_magic_endian(header->magic,
3307 header->attr_size, false, ph) < 0) {
3308 pr_debug("magic/endian check failed\n");
3309 return -1;
3310 }
3311
3312 if (ph->needs_swap) {
3313 mem_bswap_64(header, offsetof(struct perf_file_header,
3314 adds_features));
3315 }
3316
3317 if (header->size != sizeof(*header)) {
3318 /* Support the previous format */
3319 if (header->size == offsetof(typeof(*header), adds_features))
3320 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
3321 else
3322 return -1;
3323 } else if (ph->needs_swap) {
3324 /*
3325 * feature bitmap is declared as an array of unsigned longs --
3326 * not good since its size can differ between the host that
3327 * generated the data file and the host analyzing the file.
3328 *
3329 * We need to handle endianness, but we don't know the size of
3330 * the unsigned long where the file was generated. Take a best
3331 * guess at determining it: try 64-bit swap first (ie., file
3332 * created on a 64-bit host), and check if the hostname feature
3333 * bit is set (this feature bit is forced on as of fbe96f2).
3334 * If the bit is not, undo the 64-bit swap and try a 32-bit
3335 * swap. If the hostname bit is still not set (e.g., older data
3336 * file), punt and fallback to the original behavior --
3337 * clearing all feature bits and setting buildid.
3338 */
3339 mem_bswap_64(&header->adds_features,
3340 BITS_TO_U64(HEADER_FEAT_BITS));
3341
3342 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
3343 /* unswap as u64 */
3344 mem_bswap_64(&header->adds_features,
3345 BITS_TO_U64(HEADER_FEAT_BITS));
3346
3347 /* unswap as u32 */
3348 mem_bswap_32(&header->adds_features,
3349 BITS_TO_U32(HEADER_FEAT_BITS));
3350 }
3351
3352 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
3353 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
3354 set_bit(HEADER_BUILD_ID, header->adds_features);
3355 }
3356 }
3357
3358 memcpy(&ph->adds_features, &header->adds_features,
3359 sizeof(ph->adds_features));
3360
3361 ph->data_offset = header->data.offset;
3362 ph->data_size = header->data.size;
3363 ph->feat_offset = header->data.offset + header->data.size;
3364 return 0;
3365 }
3366
3367 static int perf_file_section__process(struct perf_file_section *section,
3368 struct perf_header *ph,
3369 int feat, int fd, void *data)
3370 {
3371 struct feat_fd fdd = {
3372 .fd = fd,
3373 .ph = ph,
3374 .size = section->size,
3375 .offset = section->offset,
3376 };
3377
3378 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
3379 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
3380 "%d, continuing...\n", section->offset, feat);
3381 return 0;
3382 }
3383
3384 if (feat >= HEADER_LAST_FEATURE) {
3385 pr_debug("unknown feature %d, continuing...\n", feat);
3386 return 0;
3387 }
3388
3389 if (!feat_ops[feat].process)
3390 return 0;
3391
3392 return feat_ops[feat].process(&fdd, data);
3393 }
3394
3395 static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
3396 struct perf_header *ph, int fd,
3397 bool repipe)
3398 {
3399 struct feat_fd ff = {
3400 .fd = STDOUT_FILENO,
3401 .ph = ph,
3402 };
3403 ssize_t ret;
3404
3405 ret = readn(fd, header, sizeof(*header));
3406 if (ret <= 0)
3407 return -1;
3408
3409 if (check_magic_endian(header->magic, header->size, true, ph) < 0) {
3410 pr_debug("endian/magic failed\n");
3411 return -1;
3412 }
3413
3414 if (ph->needs_swap)
3415 header->size = bswap_64(header->size);
3416
3417 if (repipe && do_write(&ff, header, sizeof(*header)) < 0)
3418 return -1;
3419
3420 return 0;
3421 }
3422
3423 static int perf_header__read_pipe(struct perf_session *session)
3424 {
3425 struct perf_header *header = &session->header;
3426 struct perf_pipe_file_header f_header;
3427
3428 if (perf_file_header__read_pipe(&f_header, header,
3429 perf_data__fd(session->data),
3430 session->repipe) < 0) {
3431 pr_debug("incompatible file format\n");
3432 return -EINVAL;
3433 }
3434
3435 return 0;
3436 }
3437
3438 static int read_attr(int fd, struct perf_header *ph,
3439 struct perf_file_attr *f_attr)
3440 {
3441 struct perf_event_attr *attr = &f_attr->attr;
3442 size_t sz, left;
3443 size_t our_sz = sizeof(f_attr->attr);
3444 ssize_t ret;
3445
3446 memset(f_attr, 0, sizeof(*f_attr));
3447
3448 /* read minimal guaranteed structure */
3449 ret = readn(fd, attr, PERF_ATTR_SIZE_VER0);
3450 if (ret <= 0) {
3451 pr_debug("cannot read %d bytes of header attr\n",
3452 PERF_ATTR_SIZE_VER0);
3453 return -1;
3454 }
3455
3456 /* on file perf_event_attr size */
3457 sz = attr->size;
3458
3459 if (ph->needs_swap)
3460 sz = bswap_32(sz);
3461
3462 if (sz == 0) {
3463 /* assume ABI0 */
3464 sz = PERF_ATTR_SIZE_VER0;
3465 } else if (sz > our_sz) {
3466 pr_debug("file uses a more recent and unsupported ABI"
3467 " (%zu bytes extra)\n", sz - our_sz);
3468 return -1;
3469 }
3470 /* what we have not yet read and that we know about */
3471 left = sz - PERF_ATTR_SIZE_VER0;
3472 if (left) {
3473 void *ptr = attr;
3474 ptr += PERF_ATTR_SIZE_VER0;
3475
3476 ret = readn(fd, ptr, left);
3477 }
3478 /* read perf_file_section, ids are read in caller */
3479 ret = readn(fd, &f_attr->ids, sizeof(f_attr->ids));
3480
3481 return ret <= 0 ? -1 : 0;
3482 }
3483
3484 static int perf_evsel__prepare_tracepoint_event(struct evsel *evsel,
3485 struct tep_handle *pevent)
3486 {
3487 struct tep_event *event;
3488 char bf[128];
3489
3490 /* already prepared */
3491 if (evsel->tp_format)
3492 return 0;
3493
3494 if (pevent == NULL) {
3495 pr_debug("broken or missing trace data\n");
3496 return -1;
3497 }
3498
3499 event = tep_find_event(pevent, evsel->core.attr.config);
3500 if (event == NULL) {
3501 pr_debug("cannot find event format for %d\n", (int)evsel->core.attr.config);
3502 return -1;
3503 }
3504
3505 if (!evsel->name) {
3506 snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name);
3507 evsel->name = strdup(bf);
3508 if (evsel->name == NULL)
3509 return -1;
3510 }
3511
3512 evsel->tp_format = event;
3513 return 0;
3514 }
3515
3516 static int perf_evlist__prepare_tracepoint_events(struct evlist *evlist,
3517 struct tep_handle *pevent)
3518 {
3519 struct evsel *pos;
3520
3521 evlist__for_each_entry(evlist, pos) {
3522 if (pos->core.attr.type == PERF_TYPE_TRACEPOINT &&
3523 perf_evsel__prepare_tracepoint_event(pos, pevent))
3524 return -1;
3525 }
3526
3527 return 0;
3528 }
3529
3530 int perf_session__read_header(struct perf_session *session)
3531 {
3532 struct perf_data *data = session->data;
3533 struct perf_header *header = &session->header;
3534 struct perf_file_header f_header;
3535 struct perf_file_attr f_attr;
3536 u64 f_id;
3537 int nr_attrs, nr_ids, i, j;
3538 int fd = perf_data__fd(data);
3539
3540 session->evlist = evlist__new();
3541 if (session->evlist == NULL)
3542 return -ENOMEM;
3543
3544 session->evlist->env = &header->env;
3545 session->machines.host.env = &header->env;
3546 if (perf_data__is_pipe(data))
3547 return perf_header__read_pipe(session);
3548
3549 if (perf_file_header__read(&f_header, header, fd) < 0)
3550 return -EINVAL;
3551
3552 /*
3553 * Sanity check that perf.data was written cleanly; data size is
3554 * initialized to 0 and updated only if the on_exit function is run.
3555 * If data size is still 0 then the file contains only partial
3556 * information. Just warn user and process it as much as it can.
3557 */
3558 if (f_header.data.size == 0) {
3559 pr_warning("WARNING: The %s file's data size field is 0 which is unexpected.\n"
3560 "Was the 'perf record' command properly terminated?\n",
3561 data->file.path);
3562 }
3563
3564 if (f_header.attr_size == 0) {
3565 pr_err("ERROR: The %s file's attr size field is 0 which is unexpected.\n"
3566 "Was the 'perf record' command properly terminated?\n",
3567 data->file.path);
3568 return -EINVAL;
3569 }
3570
3571 nr_attrs = f_header.attrs.size / f_header.attr_size;
3572 lseek(fd, f_header.attrs.offset, SEEK_SET);
3573
3574 for (i = 0; i < nr_attrs; i++) {
3575 struct evsel *evsel;
3576 off_t tmp;
3577
3578 if (read_attr(fd, header, &f_attr) < 0)
3579 goto out_errno;
3580
3581 if (header->needs_swap) {
3582 f_attr.ids.size = bswap_64(f_attr.ids.size);
3583 f_attr.ids.offset = bswap_64(f_attr.ids.offset);
3584 perf_event__attr_swap(&f_attr.attr);
3585 }
3586
3587 tmp = lseek(fd, 0, SEEK_CUR);
3588 evsel = evsel__new(&f_attr.attr);
3589
3590 if (evsel == NULL)
3591 goto out_delete_evlist;
3592
3593 evsel->needs_swap = header->needs_swap;
3594 /*
3595 * Do it before so that if perf_evsel__alloc_id fails, this
3596 * entry gets purged too at evlist__delete().
3597 */
3598 evlist__add(session->evlist, evsel);
3599
3600 nr_ids = f_attr.ids.size / sizeof(u64);
3601 /*
3602 * We don't have the cpu and thread maps on the header, so
3603 * for allocating the perf_sample_id table we fake 1 cpu and
3604 * hattr->ids threads.
3605 */
3606 if (perf_evsel__alloc_id(&evsel->core, 1, nr_ids))
3607 goto out_delete_evlist;
3608
3609 lseek(fd, f_attr.ids.offset, SEEK_SET);
3610
3611 for (j = 0; j < nr_ids; j++) {
3612 if (perf_header__getbuffer64(header, fd, &f_id, sizeof(f_id)))
3613 goto out_errno;
3614
3615 perf_evlist__id_add(&session->evlist->core, &evsel->core, 0, j, f_id);
3616 }
3617
3618 lseek(fd, tmp, SEEK_SET);
3619 }
3620
3621 perf_header__process_sections(header, fd, &session->tevent,
3622 perf_file_section__process);
3623
3624 if (perf_evlist__prepare_tracepoint_events(session->evlist,
3625 session->tevent.pevent))
3626 goto out_delete_evlist;
3627
3628 return 0;
3629 out_errno:
3630 return -errno;
3631
3632 out_delete_evlist:
3633 evlist__delete(session->evlist);
3634 session->evlist = NULL;
3635 return -ENOMEM;
3636 }
3637
3638 int perf_event__process_feature(struct perf_session *session,
3639 union perf_event *event)
3640 {
3641 struct perf_tool *tool = session->tool;
3642 struct feat_fd ff = { .fd = 0 };
3643 struct perf_record_header_feature *fe = (struct perf_record_header_feature *)event;
3644 int type = fe->header.type;
3645 u64 feat = fe->feat_id;
3646
3647 if (type < 0 || type >= PERF_RECORD_HEADER_MAX) {
3648 pr_warning("invalid record type %d in pipe-mode\n", type);
3649 return 0;
3650 }
3651 if (feat == HEADER_RESERVED || feat >= HEADER_LAST_FEATURE) {
3652 pr_warning("invalid record type %d in pipe-mode\n", type);
3653 return -1;
3654 }
3655
3656 if (!feat_ops[feat].process)
3657 return 0;
3658
3659 ff.buf = (void *)fe->data;
3660 ff.size = event->header.size - sizeof(*fe);
3661 ff.ph = &session->header;
3662
3663 if (feat_ops[feat].process(&ff, NULL))
3664 return -1;
3665
3666 if (!feat_ops[feat].print || !tool->show_feat_hdr)
3667 return 0;
3668
3669 if (!feat_ops[feat].full_only ||
3670 tool->show_feat_hdr >= SHOW_FEAT_HEADER_FULL_INFO) {
3671 feat_ops[feat].print(&ff, stdout);
3672 } else {
3673 fprintf(stdout, "# %s info available, use -I to display\n",
3674 feat_ops[feat].name);
3675 }
3676
3677 return 0;
3678 }
3679
3680 size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp)
3681 {
3682 struct perf_record_event_update *ev = &event->event_update;
3683 struct perf_record_event_update_scale *ev_scale;
3684 struct perf_record_event_update_cpus *ev_cpus;
3685 struct perf_cpu_map *map;
3686 size_t ret;
3687
3688 ret = fprintf(fp, "\n... id: %" PRI_lu64 "\n", ev->id);
3689
3690 switch (ev->type) {
3691 case PERF_EVENT_UPDATE__SCALE:
3692 ev_scale = (struct perf_record_event_update_scale *)ev->data;
3693 ret += fprintf(fp, "... scale: %f\n", ev_scale->scale);
3694 break;
3695 case PERF_EVENT_UPDATE__UNIT:
3696 ret += fprintf(fp, "... unit: %s\n", ev->data);
3697 break;
3698 case PERF_EVENT_UPDATE__NAME:
3699 ret += fprintf(fp, "... name: %s\n", ev->data);
3700 break;
3701 case PERF_EVENT_UPDATE__CPUS:
3702 ev_cpus = (struct perf_record_event_update_cpus *)ev->data;
3703 ret += fprintf(fp, "... ");
3704
3705 map = cpu_map__new_data(&ev_cpus->cpus);
3706 if (map)
3707 ret += cpu_map__fprintf(map, fp);
3708 else
3709 ret += fprintf(fp, "failed to get cpus\n");
3710 break;
3711 default:
3712 ret += fprintf(fp, "... unknown type\n");
3713 break;
3714 }
3715
3716 return ret;
3717 }
3718
3719 int perf_event__process_attr(struct perf_tool *tool __maybe_unused,
3720 union perf_event *event,
3721 struct evlist **pevlist)
3722 {
3723 u32 i, ids, n_ids;
3724 struct evsel *evsel;
3725 struct evlist *evlist = *pevlist;
3726
3727 if (evlist == NULL) {
3728 *pevlist = evlist = evlist__new();
3729 if (evlist == NULL)
3730 return -ENOMEM;
3731 }
3732
3733 evsel = evsel__new(&event->attr.attr);
3734 if (evsel == NULL)
3735 return -ENOMEM;
3736
3737 evlist__add(evlist, evsel);
3738
3739 ids = event->header.size;
3740 ids -= (void *)&event->attr.id - (void *)event;
3741 n_ids = ids / sizeof(u64);
3742 /*
3743 * We don't have the cpu and thread maps on the header, so
3744 * for allocating the perf_sample_id table we fake 1 cpu and
3745 * hattr->ids threads.
3746 */
3747 if (perf_evsel__alloc_id(&evsel->core, 1, n_ids))
3748 return -ENOMEM;
3749
3750 for (i = 0; i < n_ids; i++) {
3751 perf_evlist__id_add(&evlist->core, &evsel->core, 0, i, event->attr.id[i]);
3752 }
3753
3754 return 0;
3755 }
3756
3757 int perf_event__process_event_update(struct perf_tool *tool __maybe_unused,
3758 union perf_event *event,
3759 struct evlist **pevlist)
3760 {
3761 struct perf_record_event_update *ev = &event->event_update;
3762 struct perf_record_event_update_scale *ev_scale;
3763 struct perf_record_event_update_cpus *ev_cpus;
3764 struct evlist *evlist;
3765 struct evsel *evsel;
3766 struct perf_cpu_map *map;
3767
3768 if (!pevlist || *pevlist == NULL)
3769 return -EINVAL;
3770
3771 evlist = *pevlist;
3772
3773 evsel = perf_evlist__id2evsel(evlist, ev->id);
3774 if (evsel == NULL)
3775 return -EINVAL;
3776
3777 switch (ev->type) {
3778 case PERF_EVENT_UPDATE__UNIT:
3779 evsel->unit = strdup(ev->data);
3780 break;
3781 case PERF_EVENT_UPDATE__NAME:
3782 evsel->name = strdup(ev->data);
3783 break;
3784 case PERF_EVENT_UPDATE__SCALE:
3785 ev_scale = (struct perf_record_event_update_scale *)ev->data;
3786 evsel->scale = ev_scale->scale;
3787 break;
3788 case PERF_EVENT_UPDATE__CPUS:
3789 ev_cpus = (struct perf_record_event_update_cpus *)ev->data;
3790
3791 map = cpu_map__new_data(&ev_cpus->cpus);
3792 if (map)
3793 evsel->core.own_cpus = map;
3794 else
3795 pr_err("failed to get event_update cpus\n");
3796 default:
3797 break;
3798 }
3799
3800 return 0;
3801 }
3802
3803 int perf_event__process_tracing_data(struct perf_session *session,
3804 union perf_event *event)
3805 {
3806 ssize_t size_read, padding, size = event->tracing_data.size;
3807 int fd = perf_data__fd(session->data);
3808 off_t offset = lseek(fd, 0, SEEK_CUR);
3809 char buf[BUFSIZ];
3810
3811 /* setup for reading amidst mmap */
3812 lseek(fd, offset + sizeof(struct perf_record_header_tracing_data),
3813 SEEK_SET);
3814
3815 size_read = trace_report(fd, &session->tevent,
3816 session->repipe);
3817 padding = PERF_ALIGN(size_read, sizeof(u64)) - size_read;
3818
3819 if (readn(fd, buf, padding) < 0) {
3820 pr_err("%s: reading input file", __func__);
3821 return -1;
3822 }
3823 if (session->repipe) {
3824 int retw = write(STDOUT_FILENO, buf, padding);
3825 if (retw <= 0 || retw != padding) {
3826 pr_err("%s: repiping tracing data padding", __func__);
3827 return -1;
3828 }
3829 }
3830
3831 if (size_read + padding != size) {
3832 pr_err("%s: tracing data size mismatch", __func__);
3833 return -1;
3834 }
3835
3836 perf_evlist__prepare_tracepoint_events(session->evlist,
3837 session->tevent.pevent);
3838
3839 return size_read + padding;
3840 }
3841
3842 int perf_event__process_build_id(struct perf_session *session,
3843 union perf_event *event)
3844 {
3845 __event_process_build_id(&event->build_id,
3846 event->build_id.filename,
3847 session);
3848 return 0;
3849 }
Linux with added FPC-III support