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perf intel-pt: Add lookahead callback
[linux/fpc-iii.git] / tools / perf / util / header.c
blob06ddb6618ef30af300d3b402ff5d98941e9fb218
1 // SPDX-License-Identifier: GPL-2.0
2 #include <errno.h>
3 #include <inttypes.h>
4 #include "util.h"
5 #include "string2.h"
6 #include <sys/param.h>
7 #include <sys/types.h>
8 #include <byteswap.h>
9 #include <unistd.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <linux/compiler.h>
13 #include <linux/list.h>
14 #include <linux/kernel.h>
15 #include <linux/bitops.h>
16 #include <linux/stringify.h>
17 #include <sys/stat.h>
18 #include <sys/utsname.h>
19 #include <linux/time64.h>
20 #include <dirent.h>
21 #include <bpf/libbpf.h>
22
23 #include "evlist.h"
24 #include "evsel.h"
25 #include "header.h"
26 #include "memswap.h"
27 #include "../perf.h"
28 #include "trace-event.h"
29 #include "session.h"
30 #include "symbol.h"
31 #include "debug.h"
32 #include "cpumap.h"
33 #include "pmu.h"
34 #include "vdso.h"
35 #include "strbuf.h"
36 #include "build-id.h"
37 #include "data.h"
38 #include <api/fs/fs.h>
39 #include "asm/bug.h"
40 #include "tool.h"
41 #include "time-utils.h"
42 #include "units.h"
43 #include "cputopo.h"
44 #include "bpf-event.h"
45
46 #include "sane_ctype.h"
47
48 /*
49 * magic2 = "PERFILE2"
50 * must be a numerical value to let the endianness
51 * determine the memory layout. That way we are able
52 * to detect endianness when reading the perf.data file
53 * back.
54 *
55 * we check for legacy (PERFFILE) format.
56 */
57 static const char *__perf_magic1 = "PERFFILE";
58 static const u64 __perf_magic2 = 0x32454c4946524550ULL;
59 static const u64 __perf_magic2_sw = 0x50455246494c4532ULL;
60
61 #define PERF_MAGIC __perf_magic2
62
63 const char perf_version_string[] = PERF_VERSION;
64
65 struct perf_file_attr {
66 struct perf_event_attr attr;
67 struct perf_file_section ids;
68 };
69
70 struct feat_fd {
71 struct perf_header *ph;
72 int fd;
73 void *buf; /* Either buf != NULL or fd >= 0 */
74 ssize_t offset;
75 size_t size;
76 struct perf_evsel *events;
77 };
78
79 void perf_header__set_feat(struct perf_header *header, int feat)
80 {
81 set_bit(feat, header->adds_features);
82 }
83
84 void perf_header__clear_feat(struct perf_header *header, int feat)
85 {
86 clear_bit(feat, header->adds_features);
87 }
88
89 bool perf_header__has_feat(const struct perf_header *header, int feat)
90 {
91 return test_bit(feat, header->adds_features);
92 }
93
94 static int __do_write_fd(struct feat_fd *ff, const void *buf, size_t size)
95 {
96 ssize_t ret = writen(ff->fd, buf, size);
97
98 if (ret != (ssize_t)size)
99 return ret < 0 ? (int)ret : -1;
100 return 0;
101 }
102
103 static int __do_write_buf(struct feat_fd *ff, const void *buf, size_t size)
104 {
105 /* struct perf_event_header::size is u16 */
106 const size_t max_size = 0xffff - sizeof(struct perf_event_header);
107 size_t new_size = ff->size;
108 void *addr;
109
110 if (size + ff->offset > max_size)
111 return -E2BIG;
112
113 while (size > (new_size - ff->offset))
114 new_size <<= 1;
115 new_size = min(max_size, new_size);
116
117 if (ff->size < new_size) {
118 addr = realloc(ff->buf, new_size);
119 if (!addr)
120 return -ENOMEM;
121 ff->buf = addr;
122 ff->size = new_size;
123 }
124
125 memcpy(ff->buf + ff->offset, buf, size);
126 ff->offset += size;
127
128 return 0;
129 }
130
131 /* Return: 0 if succeded, -ERR if failed. */
132 int do_write(struct feat_fd *ff, const void *buf, size_t size)
133 {
134 if (!ff->buf)
135 return __do_write_fd(ff, buf, size);
136 return __do_write_buf(ff, buf, size);
137 }
138
139 /* Return: 0 if succeded, -ERR if failed. */
140 static int do_write_bitmap(struct feat_fd *ff, unsigned long *set, u64 size)
141 {
142 u64 *p = (u64 *) set;
143 int i, ret;
144
145 ret = do_write(ff, &size, sizeof(size));
146 if (ret < 0)
147 return ret;
148
149 for (i = 0; (u64) i < BITS_TO_U64(size); i++) {
150 ret = do_write(ff, p + i, sizeof(*p));
151 if (ret < 0)
152 return ret;
153 }
154
155 return 0;
156 }
157
158 /* Return: 0 if succeded, -ERR if failed. */
159 int write_padded(struct feat_fd *ff, const void *bf,
160 size_t count, size_t count_aligned)
161 {
162 static const char zero_buf[NAME_ALIGN];
163 int err = do_write(ff, bf, count);
164
165 if (!err)
166 err = do_write(ff, zero_buf, count_aligned - count);
167
168 return err;
169 }
170
171 #define string_size(str) \
172 (PERF_ALIGN((strlen(str) + 1), NAME_ALIGN) + sizeof(u32))
173
174 /* Return: 0 if succeded, -ERR if failed. */
175 static int do_write_string(struct feat_fd *ff, const char *str)
176 {
177 u32 len, olen;
178 int ret;
179
180 olen = strlen(str) + 1;
181 len = PERF_ALIGN(olen, NAME_ALIGN);
182
183 /* write len, incl. \0 */
184 ret = do_write(ff, &len, sizeof(len));
185 if (ret < 0)
186 return ret;
187
188 return write_padded(ff, str, olen, len);
189 }
190
191 static int __do_read_fd(struct feat_fd *ff, void *addr, ssize_t size)
192 {
193 ssize_t ret = readn(ff->fd, addr, size);
194
195 if (ret != size)
196 return ret < 0 ? (int)ret : -1;
197 return 0;
198 }
199
200 static int __do_read_buf(struct feat_fd *ff, void *addr, ssize_t size)
201 {
202 if (size > (ssize_t)ff->size - ff->offset)
203 return -1;
204
205 memcpy(addr, ff->buf + ff->offset, size);
206 ff->offset += size;
207
208 return 0;
209
210 }
211
212 static int __do_read(struct feat_fd *ff, void *addr, ssize_t size)
213 {
214 if (!ff->buf)
215 return __do_read_fd(ff, addr, size);
216 return __do_read_buf(ff, addr, size);
217 }
218
219 static int do_read_u32(struct feat_fd *ff, u32 *addr)
220 {
221 int ret;
222
223 ret = __do_read(ff, addr, sizeof(*addr));
224 if (ret)
225 return ret;
226
227 if (ff->ph->needs_swap)
228 *addr = bswap_32(*addr);
229 return 0;
230 }
231
232 static int do_read_u64(struct feat_fd *ff, u64 *addr)
233 {
234 int ret;
235
236 ret = __do_read(ff, addr, sizeof(*addr));
237 if (ret)
238 return ret;
239
240 if (ff->ph->needs_swap)
241 *addr = bswap_64(*addr);
242 return 0;
243 }
244
245 static char *do_read_string(struct feat_fd *ff)
246 {
247 u32 len;
248 char *buf;
249
250 if (do_read_u32(ff, &len))
251 return NULL;
252
253 buf = malloc(len);
254 if (!buf)
255 return NULL;
256
257 if (!__do_read(ff, buf, len)) {
258 /*
259 * strings are padded by zeroes
260 * thus the actual strlen of buf
261 * may be less than len
262 */
263 return buf;
264 }
265
266 free(buf);
267 return NULL;
268 }
269
270 /* Return: 0 if succeded, -ERR if failed. */
271 static int do_read_bitmap(struct feat_fd *ff, unsigned long **pset, u64 *psize)
272 {
273 unsigned long *set;
274 u64 size, *p;
275 int i, ret;
276
277 ret = do_read_u64(ff, &size);
278 if (ret)
279 return ret;
280
281 set = bitmap_alloc(size);
282 if (!set)
283 return -ENOMEM;
284
285 p = (u64 *) set;
286
287 for (i = 0; (u64) i < BITS_TO_U64(size); i++) {
288 ret = do_read_u64(ff, p + i);
289 if (ret < 0) {
290 free(set);
291 return ret;
292 }
293 }
294
295 *pset = set;
296 *psize = size;
297 return 0;
298 }
299
300 static int write_tracing_data(struct feat_fd *ff,
301 struct perf_evlist *evlist)
302 {
303 if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__))
304 return -1;
305
306 return read_tracing_data(ff->fd, &evlist->entries);
307 }
308
309 static int write_build_id(struct feat_fd *ff,
310 struct perf_evlist *evlist __maybe_unused)
311 {
312 struct perf_session *session;
313 int err;
314
315 session = container_of(ff->ph, struct perf_session, header);
316
317 if (!perf_session__read_build_ids(session, true))
318 return -1;
319
320 if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__))
321 return -1;
322
323 err = perf_session__write_buildid_table(session, ff);
324 if (err < 0) {
325 pr_debug("failed to write buildid table\n");
326 return err;
327 }
328 perf_session__cache_build_ids(session);
329
330 return 0;
331 }
332
333 static int write_hostname(struct feat_fd *ff,
334 struct perf_evlist *evlist __maybe_unused)
335 {
336 struct utsname uts;
337 int ret;
338
339 ret = uname(&uts);
340 if (ret < 0)
341 return -1;
342
343 return do_write_string(ff, uts.nodename);
344 }
345
346 static int write_osrelease(struct feat_fd *ff,
347 struct perf_evlist *evlist __maybe_unused)
348 {
349 struct utsname uts;
350 int ret;
351
352 ret = uname(&uts);
353 if (ret < 0)
354 return -1;
355
356 return do_write_string(ff, uts.release);
357 }
358
359 static int write_arch(struct feat_fd *ff,
360 struct perf_evlist *evlist __maybe_unused)
361 {
362 struct utsname uts;
363 int ret;
364
365 ret = uname(&uts);
366 if (ret < 0)
367 return -1;
368
369 return do_write_string(ff, uts.machine);
370 }
371
372 static int write_version(struct feat_fd *ff,
373 struct perf_evlist *evlist __maybe_unused)
374 {
375 return do_write_string(ff, perf_version_string);
376 }
377
378 static int __write_cpudesc(struct feat_fd *ff, const char *cpuinfo_proc)
379 {
380 FILE *file;
381 char *buf = NULL;
382 char *s, *p;
383 const char *search = cpuinfo_proc;
384 size_t len = 0;
385 int ret = -1;
386
387 if (!search)
388 return -1;
389
390 file = fopen("/proc/cpuinfo", "r");
391 if (!file)
392 return -1;
393
394 while (getline(&buf, &len, file) > 0) {
395 ret = strncmp(buf, search, strlen(search));
396 if (!ret)
397 break;
398 }
399
400 if (ret) {
401 ret = -1;
402 goto done;
403 }
404
405 s = buf;
406
407 p = strchr(buf, ':');
408 if (p && *(p+1) == ' ' && *(p+2))
409 s = p + 2;
410 p = strchr(s, '\n');
411 if (p)
412 *p = '\0';
413
414 /* squash extra space characters (branding string) */
415 p = s;
416 while (*p) {
417 if (isspace(*p)) {
418 char *r = p + 1;
419 char *q = r;
420 *p = ' ';
421 while (*q && isspace(*q))
422 q++;
423 if (q != (p+1))
424 while ((*r++ = *q++));
425 }
426 p++;
427 }
428 ret = do_write_string(ff, s);
429 done:
430 free(buf);
431 fclose(file);
432 return ret;
433 }
434
435 static int write_cpudesc(struct feat_fd *ff,
436 struct perf_evlist *evlist __maybe_unused)
437 {
438 const char *cpuinfo_procs[] = CPUINFO_PROC;
439 unsigned int i;
440
441 for (i = 0; i < ARRAY_SIZE(cpuinfo_procs); i++) {
442 int ret;
443 ret = __write_cpudesc(ff, cpuinfo_procs[i]);
444 if (ret >= 0)
445 return ret;
446 }
447 return -1;
448 }
449
450
451 static int write_nrcpus(struct feat_fd *ff,
452 struct perf_evlist *evlist __maybe_unused)
453 {
454 long nr;
455 u32 nrc, nra;
456 int ret;
457
458 nrc = cpu__max_present_cpu();
459
460 nr = sysconf(_SC_NPROCESSORS_ONLN);
461 if (nr < 0)
462 return -1;
463
464 nra = (u32)(nr & UINT_MAX);
465
466 ret = do_write(ff, &nrc, sizeof(nrc));
467 if (ret < 0)
468 return ret;
469
470 return do_write(ff, &nra, sizeof(nra));
471 }
472
473 static int write_event_desc(struct feat_fd *ff,
474 struct perf_evlist *evlist)
475 {
476 struct perf_evsel *evsel;
477 u32 nre, nri, sz;
478 int ret;
479
480 nre = evlist->nr_entries;
481
482 /*
483 * write number of events
484 */
485 ret = do_write(ff, &nre, sizeof(nre));
486 if (ret < 0)
487 return ret;
488
489 /*
490 * size of perf_event_attr struct
491 */
492 sz = (u32)sizeof(evsel->attr);
493 ret = do_write(ff, &sz, sizeof(sz));
494 if (ret < 0)
495 return ret;
496
497 evlist__for_each_entry(evlist, evsel) {
498 ret = do_write(ff, &evsel->attr, sz);
499 if (ret < 0)
500 return ret;
501 /*
502 * write number of unique id per event
503 * there is one id per instance of an event
504 *
505 * copy into an nri to be independent of the
506 * type of ids,
507 */
508 nri = evsel->ids;
509 ret = do_write(ff, &nri, sizeof(nri));
510 if (ret < 0)
511 return ret;
512
513 /*
514 * write event string as passed on cmdline
515 */
516 ret = do_write_string(ff, perf_evsel__name(evsel));
517 if (ret < 0)
518 return ret;
519 /*
520 * write unique ids for this event
521 */
522 ret = do_write(ff, evsel->id, evsel->ids * sizeof(u64));
523 if (ret < 0)
524 return ret;
525 }
526 return 0;
527 }
528
529 static int write_cmdline(struct feat_fd *ff,
530 struct perf_evlist *evlist __maybe_unused)
531 {
532 char pbuf[MAXPATHLEN], *buf;
533 int i, ret, n;
534
535 /* actual path to perf binary */
536 buf = perf_exe(pbuf, MAXPATHLEN);
537
538 /* account for binary path */
539 n = perf_env.nr_cmdline + 1;
540
541 ret = do_write(ff, &n, sizeof(n));
542 if (ret < 0)
543 return ret;
544
545 ret = do_write_string(ff, buf);
546 if (ret < 0)
547 return ret;
548
549 for (i = 0 ; i < perf_env.nr_cmdline; i++) {
550 ret = do_write_string(ff, perf_env.cmdline_argv[i]);
551 if (ret < 0)
552 return ret;
553 }
554 return 0;
555 }
556
557
558 static int write_cpu_topology(struct feat_fd *ff,
559 struct perf_evlist *evlist __maybe_unused)
560 {
561 struct cpu_topology *tp;
562 u32 i;
563 int ret, j;
564
565 tp = cpu_topology__new();
566 if (!tp)
567 return -1;
568
569 ret = do_write(ff, &tp->core_sib, sizeof(tp->core_sib));
570 if (ret < 0)
571 goto done;
572
573 for (i = 0; i < tp->core_sib; i++) {
574 ret = do_write_string(ff, tp->core_siblings[i]);
575 if (ret < 0)
576 goto done;
577 }
578 ret = do_write(ff, &tp->thread_sib, sizeof(tp->thread_sib));
579 if (ret < 0)
580 goto done;
581
582 for (i = 0; i < tp->thread_sib; i++) {
583 ret = do_write_string(ff, tp->thread_siblings[i]);
584 if (ret < 0)
585 break;
586 }
587
588 ret = perf_env__read_cpu_topology_map(&perf_env);
589 if (ret < 0)
590 goto done;
591
592 for (j = 0; j < perf_env.nr_cpus_avail; j++) {
593 ret = do_write(ff, &perf_env.cpu[j].core_id,
594 sizeof(perf_env.cpu[j].core_id));
595 if (ret < 0)
596 return ret;
597 ret = do_write(ff, &perf_env.cpu[j].socket_id,
598 sizeof(perf_env.cpu[j].socket_id));
599 if (ret < 0)
600 return ret;
601 }
602
603 if (!tp->die_sib)
604 goto done;
605
606 ret = do_write(ff, &tp->die_sib, sizeof(tp->die_sib));
607 if (ret < 0)
608 goto done;
609
610 for (i = 0; i < tp->die_sib; i++) {
611 ret = do_write_string(ff, tp->die_siblings[i]);
612 if (ret < 0)
613 goto done;
614 }
615
616 for (j = 0; j < perf_env.nr_cpus_avail; j++) {
617 ret = do_write(ff, &perf_env.cpu[j].die_id,
618 sizeof(perf_env.cpu[j].die_id));
619 if (ret < 0)
620 return ret;
621 }
622
623 done:
624 cpu_topology__delete(tp);
625 return ret;
626 }
627
628
629
630 static int write_total_mem(struct feat_fd *ff,
631 struct perf_evlist *evlist __maybe_unused)
632 {
633 char *buf = NULL;
634 FILE *fp;
635 size_t len = 0;
636 int ret = -1, n;
637 uint64_t mem;
638
639 fp = fopen("/proc/meminfo", "r");
640 if (!fp)
641 return -1;
642
643 while (getline(&buf, &len, fp) > 0) {
644 ret = strncmp(buf, "MemTotal:", 9);
645 if (!ret)
646 break;
647 }
648 if (!ret) {
649 n = sscanf(buf, "%*s %"PRIu64, &mem);
650 if (n == 1)
651 ret = do_write(ff, &mem, sizeof(mem));
652 } else
653 ret = -1;
654 free(buf);
655 fclose(fp);
656 return ret;
657 }
658
659 static int write_numa_topology(struct feat_fd *ff,
660 struct perf_evlist *evlist __maybe_unused)
661 {
662 struct numa_topology *tp;
663 int ret = -1;
664 u32 i;
665
666 tp = numa_topology__new();
667 if (!tp)
668 return -ENOMEM;
669
670 ret = do_write(ff, &tp->nr, sizeof(u32));
671 if (ret < 0)
672 goto err;
673
674 for (i = 0; i < tp->nr; i++) {
675 struct numa_topology_node *n = &tp->nodes[i];
676
677 ret = do_write(ff, &n->node, sizeof(u32));
678 if (ret < 0)
679 goto err;
680
681 ret = do_write(ff, &n->mem_total, sizeof(u64));
682 if (ret)
683 goto err;
684
685 ret = do_write(ff, &n->mem_free, sizeof(u64));
686 if (ret)
687 goto err;
688
689 ret = do_write_string(ff, n->cpus);
690 if (ret < 0)
691 goto err;
692 }
693
694 ret = 0;
695
696 err:
697 numa_topology__delete(tp);
698 return ret;
699 }
700
701 /*
702 * File format:
703 *
704 * struct pmu_mappings {
705 * u32 pmu_num;
706 * struct pmu_map {
707 * u32 type;
708 * char name[];
709 * }[pmu_num];
710 * };
711 */
712
713 static int write_pmu_mappings(struct feat_fd *ff,
714 struct perf_evlist *evlist __maybe_unused)
715 {
716 struct perf_pmu *pmu = NULL;
717 u32 pmu_num = 0;
718 int ret;
719
720 /*
721 * Do a first pass to count number of pmu to avoid lseek so this
722 * works in pipe mode as well.
723 */
724 while ((pmu = perf_pmu__scan(pmu))) {
725 if (!pmu->name)
726 continue;
727 pmu_num++;
728 }
729
730 ret = do_write(ff, &pmu_num, sizeof(pmu_num));
731 if (ret < 0)
732 return ret;
733
734 while ((pmu = perf_pmu__scan(pmu))) {
735 if (!pmu->name)
736 continue;
737
738 ret = do_write(ff, &pmu->type, sizeof(pmu->type));
739 if (ret < 0)
740 return ret;
741
742 ret = do_write_string(ff, pmu->name);
743 if (ret < 0)
744 return ret;
745 }
746
747 return 0;
748 }
749
750 /*
751 * File format:
752 *
753 * struct group_descs {
754 * u32 nr_groups;
755 * struct group_desc {
756 * char name[];
757 * u32 leader_idx;
758 * u32 nr_members;
759 * }[nr_groups];
760 * };
761 */
762 static int write_group_desc(struct feat_fd *ff,
763 struct perf_evlist *evlist)
764 {
765 u32 nr_groups = evlist->nr_groups;
766 struct perf_evsel *evsel;
767 int ret;
768
769 ret = do_write(ff, &nr_groups, sizeof(nr_groups));
770 if (ret < 0)
771 return ret;
772
773 evlist__for_each_entry(evlist, evsel) {
774 if (perf_evsel__is_group_leader(evsel) &&
775 evsel->nr_members > 1) {
776 const char *name = evsel->group_name ?: "{anon_group}";
777 u32 leader_idx = evsel->idx;
778 u32 nr_members = evsel->nr_members;
779
780 ret = do_write_string(ff, name);
781 if (ret < 0)
782 return ret;
783
784 ret = do_write(ff, &leader_idx, sizeof(leader_idx));
785 if (ret < 0)
786 return ret;
787
788 ret = do_write(ff, &nr_members, sizeof(nr_members));
789 if (ret < 0)
790 return ret;
791 }
792 }
793 return 0;
794 }
795
796 /*
797 * Return the CPU id as a raw string.
798 *
799 * Each architecture should provide a more precise id string that
800 * can be use to match the architecture's "mapfile".
801 */
802 char * __weak get_cpuid_str(struct perf_pmu *pmu __maybe_unused)
803 {
804 return NULL;
805 }
806
807 /* Return zero when the cpuid from the mapfile.csv matches the
808 * cpuid string generated on this platform.
809 * Otherwise return non-zero.
810 */
811 int __weak strcmp_cpuid_str(const char *mapcpuid, const char *cpuid)
812 {
813 regex_t re;
814 regmatch_t pmatch[1];
815 int match;
816
817 if (regcomp(&re, mapcpuid, REG_EXTENDED) != 0) {
818 /* Warn unable to generate match particular string. */
819 pr_info("Invalid regular expression %s\n", mapcpuid);
820 return 1;
821 }
822
823 match = !regexec(&re, cpuid, 1, pmatch, 0);
824 regfree(&re);
825 if (match) {
826 size_t match_len = (pmatch[0].rm_eo - pmatch[0].rm_so);
827
828 /* Verify the entire string matched. */
829 if (match_len == strlen(cpuid))
830 return 0;
831 }
832 return 1;
833 }
834
835 /*
836 * default get_cpuid(): nothing gets recorded
837 * actual implementation must be in arch/$(SRCARCH)/util/header.c
838 */
839 int __weak get_cpuid(char *buffer __maybe_unused, size_t sz __maybe_unused)
840 {
841 return -1;
842 }
843
844 static int write_cpuid(struct feat_fd *ff,
845 struct perf_evlist *evlist __maybe_unused)
846 {
847 char buffer[64];
848 int ret;
849
850 ret = get_cpuid(buffer, sizeof(buffer));
851 if (ret)
852 return -1;
853
854 return do_write_string(ff, buffer);
855 }
856
857 static int write_branch_stack(struct feat_fd *ff __maybe_unused,
858 struct perf_evlist *evlist __maybe_unused)
859 {
860 return 0;
861 }
862
863 static int write_auxtrace(struct feat_fd *ff,
864 struct perf_evlist *evlist __maybe_unused)
865 {
866 struct perf_session *session;
867 int err;
868
869 if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__))
870 return -1;
871
872 session = container_of(ff->ph, struct perf_session, header);
873
874 err = auxtrace_index__write(ff->fd, &session->auxtrace_index);
875 if (err < 0)
876 pr_err("Failed to write auxtrace index\n");
877 return err;
878 }
879
880 static int write_clockid(struct feat_fd *ff,
881 struct perf_evlist *evlist __maybe_unused)
882 {
883 return do_write(ff, &ff->ph->env.clockid_res_ns,
884 sizeof(ff->ph->env.clockid_res_ns));
885 }
886
887 static int write_dir_format(struct feat_fd *ff,
888 struct perf_evlist *evlist __maybe_unused)
889 {
890 struct perf_session *session;
891 struct perf_data *data;
892
893 session = container_of(ff->ph, struct perf_session, header);
894 data = session->data;
895
896 if (WARN_ON(!perf_data__is_dir(data)))
897 return -1;
898
899 return do_write(ff, &data->dir.version, sizeof(data->dir.version));
900 }
901
902 #ifdef HAVE_LIBBPF_SUPPORT
903 static int write_bpf_prog_info(struct feat_fd *ff,
904 struct perf_evlist *evlist __maybe_unused)
905 {
906 struct perf_env *env = &ff->ph->env;
907 struct rb_root *root;
908 struct rb_node *next;
909 int ret;
910
911 down_read(&env->bpf_progs.lock);
912
913 ret = do_write(ff, &env->bpf_progs.infos_cnt,
914 sizeof(env->bpf_progs.infos_cnt));
915 if (ret < 0)
916 goto out;
917
918 root = &env->bpf_progs.infos;
919 next = rb_first(root);
920 while (next) {
921 struct bpf_prog_info_node *node;
922 size_t len;
923
924 node = rb_entry(next, struct bpf_prog_info_node, rb_node);
925 next = rb_next(&node->rb_node);
926 len = sizeof(struct bpf_prog_info_linear) +
927 node->info_linear->data_len;
928
929 /* before writing to file, translate address to offset */
930 bpf_program__bpil_addr_to_offs(node->info_linear);
931 ret = do_write(ff, node->info_linear, len);
932 /*
933 * translate back to address even when do_write() fails,
934 * so that this function never changes the data.
935 */
936 bpf_program__bpil_offs_to_addr(node->info_linear);
937 if (ret < 0)
938 goto out;
939 }
940 out:
941 up_read(&env->bpf_progs.lock);
942 return ret;
943 }
944 #else // HAVE_LIBBPF_SUPPORT
945 static int write_bpf_prog_info(struct feat_fd *ff __maybe_unused,
946 struct perf_evlist *evlist __maybe_unused)
947 {
948 return 0;
949 }
950 #endif // HAVE_LIBBPF_SUPPORT
951
952 static int write_bpf_btf(struct feat_fd *ff,
953 struct perf_evlist *evlist __maybe_unused)
954 {
955 struct perf_env *env = &ff->ph->env;
956 struct rb_root *root;
957 struct rb_node *next;
958 int ret;
959
960 down_read(&env->bpf_progs.lock);
961
962 ret = do_write(ff, &env->bpf_progs.btfs_cnt,
963 sizeof(env->bpf_progs.btfs_cnt));
964
965 if (ret < 0)
966 goto out;
967
968 root = &env->bpf_progs.btfs;
969 next = rb_first(root);
970 while (next) {
971 struct btf_node *node;
972
973 node = rb_entry(next, struct btf_node, rb_node);
974 next = rb_next(&node->rb_node);
975 ret = do_write(ff, &node->id,
976 sizeof(u32) * 2 + node->data_size);
977 if (ret < 0)
978 goto out;
979 }
980 out:
981 up_read(&env->bpf_progs.lock);
982 return ret;
983 }
984
985 static int cpu_cache_level__sort(const void *a, const void *b)
986 {
987 struct cpu_cache_level *cache_a = (struct cpu_cache_level *)a;
988 struct cpu_cache_level *cache_b = (struct cpu_cache_level *)b;
989
990 return cache_a->level - cache_b->level;
991 }
992
993 static bool cpu_cache_level__cmp(struct cpu_cache_level *a, struct cpu_cache_level *b)
994 {
995 if (a->level != b->level)
996 return false;
997
998 if (a->line_size != b->line_size)
999 return false;
1000
1001 if (a->sets != b->sets)
1002 return false;
1003
1004 if (a->ways != b->ways)
1005 return false;
1006
1007 if (strcmp(a->type, b->type))
1008 return false;
1009
1010 if (strcmp(a->size, b->size))
1011 return false;
1012
1013 if (strcmp(a->map, b->map))
1014 return false;
1015
1016 return true;
1017 }
1018
1019 static int cpu_cache_level__read(struct cpu_cache_level *cache, u32 cpu, u16 level)
1020 {
1021 char path[PATH_MAX], file[PATH_MAX];
1022 struct stat st;
1023 size_t len;
1024
1025 scnprintf(path, PATH_MAX, "devices/system/cpu/cpu%d/cache/index%d/", cpu, level);
1026 scnprintf(file, PATH_MAX, "%s/%s", sysfs__mountpoint(), path);
1027
1028 if (stat(file, &st))
1029 return 1;
1030
1031 scnprintf(file, PATH_MAX, "%s/level", path);
1032 if (sysfs__read_int(file, (int *) &cache->level))
1033 return -1;
1034
1035 scnprintf(file, PATH_MAX, "%s/coherency_line_size", path);
1036 if (sysfs__read_int(file, (int *) &cache->line_size))
1037 return -1;
1038
1039 scnprintf(file, PATH_MAX, "%s/number_of_sets", path);
1040 if (sysfs__read_int(file, (int *) &cache->sets))
1041 return -1;
1042
1043 scnprintf(file, PATH_MAX, "%s/ways_of_associativity", path);
1044 if (sysfs__read_int(file, (int *) &cache->ways))
1045 return -1;
1046
1047 scnprintf(file, PATH_MAX, "%s/type", path);
1048 if (sysfs__read_str(file, &cache->type, &len))
1049 return -1;
1050
1051 cache->type[len] = 0;
1052 cache->type = rtrim(cache->type);
1053
1054 scnprintf(file, PATH_MAX, "%s/size", path);
1055 if (sysfs__read_str(file, &cache->size, &len)) {
1056 free(cache->type);
1057 return -1;
1058 }
1059
1060 cache->size[len] = 0;
1061 cache->size = rtrim(cache->size);
1062
1063 scnprintf(file, PATH_MAX, "%s/shared_cpu_list", path);
1064 if (sysfs__read_str(file, &cache->map, &len)) {
1065 free(cache->map);
1066 free(cache->type);
1067 return -1;
1068 }
1069
1070 cache->map[len] = 0;
1071 cache->map = rtrim(cache->map);
1072 return 0;
1073 }
1074
1075 static void cpu_cache_level__fprintf(FILE *out, struct cpu_cache_level *c)
1076 {
1077 fprintf(out, "L%d %-15s %8s [%s]\n", c->level, c->type, c->size, c->map);
1078 }
1079
1080 static int build_caches(struct cpu_cache_level caches[], u32 size, u32 *cntp)
1081 {
1082 u32 i, cnt = 0;
1083 long ncpus;
1084 u32 nr, cpu;
1085 u16 level;
1086
1087 ncpus = sysconf(_SC_NPROCESSORS_CONF);
1088 if (ncpus < 0)
1089 return -1;
1090
1091 nr = (u32)(ncpus & UINT_MAX);
1092
1093 for (cpu = 0; cpu < nr; cpu++) {
1094 for (level = 0; level < 10; level++) {
1095 struct cpu_cache_level c;
1096 int err;
1097
1098 err = cpu_cache_level__read(&c, cpu, level);
1099 if (err < 0)
1100 return err;
1101
1102 if (err == 1)
1103 break;
1104
1105 for (i = 0; i < cnt; i++) {
1106 if (cpu_cache_level__cmp(&c, &caches[i]))
1107 break;
1108 }
1109
1110 if (i == cnt)
1111 caches[cnt++] = c;
1112 else
1113 cpu_cache_level__free(&c);
1114
1115 if (WARN_ONCE(cnt == size, "way too many cpu caches.."))
1116 goto out;
1117 }
1118 }
1119 out:
1120 *cntp = cnt;
1121 return 0;
1122 }
1123
1124 #define MAX_CACHES 2000
1125
1126 static int write_cache(struct feat_fd *ff,
1127 struct perf_evlist *evlist __maybe_unused)
1128 {
1129 struct cpu_cache_level caches[MAX_CACHES];
1130 u32 cnt = 0, i, version = 1;
1131 int ret;
1132
1133 ret = build_caches(caches, MAX_CACHES, &cnt);
1134 if (ret)
1135 goto out;
1136
1137 qsort(&caches, cnt, sizeof(struct cpu_cache_level), cpu_cache_level__sort);
1138
1139 ret = do_write(ff, &version, sizeof(u32));
1140 if (ret < 0)
1141 goto out;
1142
1143 ret = do_write(ff, &cnt, sizeof(u32));
1144 if (ret < 0)
1145 goto out;
1146
1147 for (i = 0; i < cnt; i++) {
1148 struct cpu_cache_level *c = &caches[i];
1149
1150 #define _W(v) \
1151 ret = do_write(ff, &c->v, sizeof(u32)); \
1152 if (ret < 0) \
1153 goto out;
1154
1155 _W(level)
1156 _W(line_size)
1157 _W(sets)
1158 _W(ways)
1159 #undef _W
1160
1161 #define _W(v) \
1162 ret = do_write_string(ff, (const char *) c->v); \
1163 if (ret < 0) \
1164 goto out;
1165
1166 _W(type)
1167 _W(size)
1168 _W(map)
1169 #undef _W
1170 }
1171
1172 out:
1173 for (i = 0; i < cnt; i++)
1174 cpu_cache_level__free(&caches[i]);
1175 return ret;
1176 }
1177
1178 static int write_stat(struct feat_fd *ff __maybe_unused,
1179 struct perf_evlist *evlist __maybe_unused)
1180 {
1181 return 0;
1182 }
1183
1184 static int write_sample_time(struct feat_fd *ff,
1185 struct perf_evlist *evlist)
1186 {
1187 int ret;
1188
1189 ret = do_write(ff, &evlist->first_sample_time,
1190 sizeof(evlist->first_sample_time));
1191 if (ret < 0)
1192 return ret;
1193
1194 return do_write(ff, &evlist->last_sample_time,
1195 sizeof(evlist->last_sample_time));
1196 }
1197
1198
1199 static int memory_node__read(struct memory_node *n, unsigned long idx)
1200 {
1201 unsigned int phys, size = 0;
1202 char path[PATH_MAX];
1203 struct dirent *ent;
1204 DIR *dir;
1205
1206 #define for_each_memory(mem, dir) \
1207 while ((ent = readdir(dir))) \
1208 if (strcmp(ent->d_name, ".") && \
1209 strcmp(ent->d_name, "..") && \
1210 sscanf(ent->d_name, "memory%u", &mem) == 1)
1211
1212 scnprintf(path, PATH_MAX,
1213 "%s/devices/system/node/node%lu",
1214 sysfs__mountpoint(), idx);
1215
1216 dir = opendir(path);
1217 if (!dir) {
1218 pr_warning("failed: cant' open memory sysfs data\n");
1219 return -1;
1220 }
1221
1222 for_each_memory(phys, dir) {
1223 size = max(phys, size);
1224 }
1225
1226 size++;
1227
1228 n->set = bitmap_alloc(size);
1229 if (!n->set) {
1230 closedir(dir);
1231 return -ENOMEM;
1232 }
1233
1234 n->node = idx;
1235 n->size = size;
1236
1237 rewinddir(dir);
1238
1239 for_each_memory(phys, dir) {
1240 set_bit(phys, n->set);
1241 }
1242
1243 closedir(dir);
1244 return 0;
1245 }
1246
1247 static int memory_node__sort(const void *a, const void *b)
1248 {
1249 const struct memory_node *na = a;
1250 const struct memory_node *nb = b;
1251
1252 return na->node - nb->node;
1253 }
1254
1255 static int build_mem_topology(struct memory_node *nodes, u64 size, u64 *cntp)
1256 {
1257 char path[PATH_MAX];
1258 struct dirent *ent;
1259 DIR *dir;
1260 u64 cnt = 0;
1261 int ret = 0;
1262
1263 scnprintf(path, PATH_MAX, "%s/devices/system/node/",
1264 sysfs__mountpoint());
1265
1266 dir = opendir(path);
1267 if (!dir) {
1268 pr_debug2("%s: could't read %s, does this arch have topology information?\n",
1269 __func__, path);
1270 return -1;
1271 }
1272
1273 while (!ret && (ent = readdir(dir))) {
1274 unsigned int idx;
1275 int r;
1276
1277 if (!strcmp(ent->d_name, ".") ||
1278 !strcmp(ent->d_name, ".."))
1279 continue;
1280
1281 r = sscanf(ent->d_name, "node%u", &idx);
1282 if (r != 1)
1283 continue;
1284
1285 if (WARN_ONCE(cnt >= size,
1286 "failed to write MEM_TOPOLOGY, way too many nodes\n"))
1287 return -1;
1288
1289 ret = memory_node__read(&nodes[cnt++], idx);
1290 }
1291
1292 *cntp = cnt;
1293 closedir(dir);
1294
1295 if (!ret)
1296 qsort(nodes, cnt, sizeof(nodes[0]), memory_node__sort);
1297
1298 return ret;
1299 }
1300
1301 #define MAX_MEMORY_NODES 2000
1302
1303 /*
1304 * The MEM_TOPOLOGY holds physical memory map for every
1305 * node in system. The format of data is as follows:
1306 *
1307 * 0 - version | for future changes
1308 * 8 - block_size_bytes | /sys/devices/system/memory/block_size_bytes
1309 * 16 - count | number of nodes
1310 *
1311 * For each node we store map of physical indexes for
1312 * each node:
1313 *
1314 * 32 - node id | node index
1315 * 40 - size | size of bitmap
1316 * 48 - bitmap | bitmap of memory indexes that belongs to node
1317 */
1318 static int write_mem_topology(struct feat_fd *ff __maybe_unused,
1319 struct perf_evlist *evlist __maybe_unused)
1320 {
1321 static struct memory_node nodes[MAX_MEMORY_NODES];
1322 u64 bsize, version = 1, i, nr;
1323 int ret;
1324
1325 ret = sysfs__read_xll("devices/system/memory/block_size_bytes",
1326 (unsigned long long *) &bsize);
1327 if (ret)
1328 return ret;
1329
1330 ret = build_mem_topology(&nodes[0], MAX_MEMORY_NODES, &nr);
1331 if (ret)
1332 return ret;
1333
1334 ret = do_write(ff, &version, sizeof(version));
1335 if (ret < 0)
1336 goto out;
1337
1338 ret = do_write(ff, &bsize, sizeof(bsize));
1339 if (ret < 0)
1340 goto out;
1341
1342 ret = do_write(ff, &nr, sizeof(nr));
1343 if (ret < 0)
1344 goto out;
1345
1346 for (i = 0; i < nr; i++) {
1347 struct memory_node *n = &nodes[i];
1348
1349 #define _W(v) \
1350 ret = do_write(ff, &n->v, sizeof(n->v)); \
1351 if (ret < 0) \
1352 goto out;
1353
1354 _W(node)
1355 _W(size)
1356
1357 #undef _W
1358
1359 ret = do_write_bitmap(ff, n->set, n->size);
1360 if (ret < 0)
1361 goto out;
1362 }
1363
1364 out:
1365 return ret;
1366 }
1367
1368 static int write_compressed(struct feat_fd *ff __maybe_unused,
1369 struct perf_evlist *evlist __maybe_unused)
1370 {
1371 int ret;
1372
1373 ret = do_write(ff, &(ff->ph->env.comp_ver), sizeof(ff->ph->env.comp_ver));
1374 if (ret)
1375 return ret;
1376
1377 ret = do_write(ff, &(ff->ph->env.comp_type), sizeof(ff->ph->env.comp_type));
1378 if (ret)
1379 return ret;
1380
1381 ret = do_write(ff, &(ff->ph->env.comp_level), sizeof(ff->ph->env.comp_level));
1382 if (ret)
1383 return ret;
1384
1385 ret = do_write(ff, &(ff->ph->env.comp_ratio), sizeof(ff->ph->env.comp_ratio));
1386 if (ret)
1387 return ret;
1388
1389 return do_write(ff, &(ff->ph->env.comp_mmap_len), sizeof(ff->ph->env.comp_mmap_len));
1390 }
1391
1392 static void print_hostname(struct feat_fd *ff, FILE *fp)
1393 {
1394 fprintf(fp, "# hostname : %s\n", ff->ph->env.hostname);
1395 }
1396
1397 static void print_osrelease(struct feat_fd *ff, FILE *fp)
1398 {
1399 fprintf(fp, "# os release : %s\n", ff->ph->env.os_release);
1400 }
1401
1402 static void print_arch(struct feat_fd *ff, FILE *fp)
1403 {
1404 fprintf(fp, "# arch : %s\n", ff->ph->env.arch);
1405 }
1406
1407 static void print_cpudesc(struct feat_fd *ff, FILE *fp)
1408 {
1409 fprintf(fp, "# cpudesc : %s\n", ff->ph->env.cpu_desc);
1410 }
1411
1412 static void print_nrcpus(struct feat_fd *ff, FILE *fp)
1413 {
1414 fprintf(fp, "# nrcpus online : %u\n", ff->ph->env.nr_cpus_online);
1415 fprintf(fp, "# nrcpus avail : %u\n", ff->ph->env.nr_cpus_avail);
1416 }
1417
1418 static void print_version(struct feat_fd *ff, FILE *fp)
1419 {
1420 fprintf(fp, "# perf version : %s\n", ff->ph->env.version);
1421 }
1422
1423 static void print_cmdline(struct feat_fd *ff, FILE *fp)
1424 {
1425 int nr, i;
1426
1427 nr = ff->ph->env.nr_cmdline;
1428
1429 fprintf(fp, "# cmdline : ");
1430
1431 for (i = 0; i < nr; i++) {
1432 char *argv_i = strdup(ff->ph->env.cmdline_argv[i]);
1433 if (!argv_i) {
1434 fprintf(fp, "%s ", ff->ph->env.cmdline_argv[i]);
1435 } else {
1436 char *mem = argv_i;
1437 do {
1438 char *quote = strchr(argv_i, '\'');
1439 if (!quote)
1440 break;
1441 *quote++ = '\0';
1442 fprintf(fp, "%s\\\'", argv_i);
1443 argv_i = quote;
1444 } while (1);
1445 fprintf(fp, "%s ", argv_i);
1446 free(mem);
1447 }
1448 }
1449 fputc('\n', fp);
1450 }
1451
1452 static void print_cpu_topology(struct feat_fd *ff, FILE *fp)
1453 {
1454 struct perf_header *ph = ff->ph;
1455 int cpu_nr = ph->env.nr_cpus_avail;
1456 int nr, i;
1457 char *str;
1458
1459 nr = ph->env.nr_sibling_cores;
1460 str = ph->env.sibling_cores;
1461
1462 for (i = 0; i < nr; i++) {
1463 fprintf(fp, "# sibling sockets : %s\n", str);
1464 str += strlen(str) + 1;
1465 }
1466
1467 if (ph->env.nr_sibling_dies) {
1468 nr = ph->env.nr_sibling_dies;
1469 str = ph->env.sibling_dies;
1470
1471 for (i = 0; i < nr; i++) {
1472 fprintf(fp, "# sibling dies : %s\n", str);
1473 str += strlen(str) + 1;
1474 }
1475 }
1476
1477 nr = ph->env.nr_sibling_threads;
1478 str = ph->env.sibling_threads;
1479
1480 for (i = 0; i < nr; i++) {
1481 fprintf(fp, "# sibling threads : %s\n", str);
1482 str += strlen(str) + 1;
1483 }
1484
1485 if (ph->env.nr_sibling_dies) {
1486 if (ph->env.cpu != NULL) {
1487 for (i = 0; i < cpu_nr; i++)
1488 fprintf(fp, "# CPU %d: Core ID %d, "
1489 "Die ID %d, Socket ID %d\n",
1490 i, ph->env.cpu[i].core_id,
1491 ph->env.cpu[i].die_id,
1492 ph->env.cpu[i].socket_id);
1493 } else
1494 fprintf(fp, "# Core ID, Die ID and Socket ID "
1495 "information is not available\n");
1496 } else {
1497 if (ph->env.cpu != NULL) {
1498 for (i = 0; i < cpu_nr; i++)
1499 fprintf(fp, "# CPU %d: Core ID %d, "
1500 "Socket ID %d\n",
1501 i, ph->env.cpu[i].core_id,
1502 ph->env.cpu[i].socket_id);
1503 } else
1504 fprintf(fp, "# Core ID and Socket ID "
1505 "information is not available\n");
1506 }
1507 }
1508
1509 static void print_clockid(struct feat_fd *ff, FILE *fp)
1510 {
1511 fprintf(fp, "# clockid frequency: %"PRIu64" MHz\n",
1512 ff->ph->env.clockid_res_ns * 1000);
1513 }
1514
1515 static void print_dir_format(struct feat_fd *ff, FILE *fp)
1516 {
1517 struct perf_session *session;
1518 struct perf_data *data;
1519
1520 session = container_of(ff->ph, struct perf_session, header);
1521 data = session->data;
1522
1523 fprintf(fp, "# directory data version : %"PRIu64"\n", data->dir.version);
1524 }
1525
1526 static void print_bpf_prog_info(struct feat_fd *ff, FILE *fp)
1527 {
1528 struct perf_env *env = &ff->ph->env;
1529 struct rb_root *root;
1530 struct rb_node *next;
1531
1532 down_read(&env->bpf_progs.lock);
1533
1534 root = &env->bpf_progs.infos;
1535 next = rb_first(root);
1536
1537 while (next) {
1538 struct bpf_prog_info_node *node;
1539
1540 node = rb_entry(next, struct bpf_prog_info_node, rb_node);
1541 next = rb_next(&node->rb_node);
1542
1543 bpf_event__print_bpf_prog_info(&node->info_linear->info,
1544 env, fp);
1545 }
1546
1547 up_read(&env->bpf_progs.lock);
1548 }
1549
1550 static void print_bpf_btf(struct feat_fd *ff, FILE *fp)
1551 {
1552 struct perf_env *env = &ff->ph->env;
1553 struct rb_root *root;
1554 struct rb_node *next;
1555
1556 down_read(&env->bpf_progs.lock);
1557
1558 root = &env->bpf_progs.btfs;
1559 next = rb_first(root);
1560
1561 while (next) {
1562 struct btf_node *node;
1563
1564 node = rb_entry(next, struct btf_node, rb_node);
1565 next = rb_next(&node->rb_node);
1566 fprintf(fp, "# btf info of id %u\n", node->id);
1567 }
1568
1569 up_read(&env->bpf_progs.lock);
1570 }
1571
1572 static void free_event_desc(struct perf_evsel *events)
1573 {
1574 struct perf_evsel *evsel;
1575
1576 if (!events)
1577 return;
1578
1579 for (evsel = events; evsel->attr.size; evsel++) {
1580 zfree(&evsel->name);
1581 zfree(&evsel->id);
1582 }
1583
1584 free(events);
1585 }
1586
1587 static struct perf_evsel *read_event_desc(struct feat_fd *ff)
1588 {
1589 struct perf_evsel *evsel, *events = NULL;
1590 u64 *id;
1591 void *buf = NULL;
1592 u32 nre, sz, nr, i, j;
1593 size_t msz;
1594
1595 /* number of events */
1596 if (do_read_u32(ff, &nre))
1597 goto error;
1598
1599 if (do_read_u32(ff, &sz))
1600 goto error;
1601
1602 /* buffer to hold on file attr struct */
1603 buf = malloc(sz);
1604 if (!buf)
1605 goto error;
1606
1607 /* the last event terminates with evsel->attr.size == 0: */
1608 events = calloc(nre + 1, sizeof(*events));
1609 if (!events)
1610 goto error;
1611
1612 msz = sizeof(evsel->attr);
1613 if (sz < msz)
1614 msz = sz;
1615
1616 for (i = 0, evsel = events; i < nre; evsel++, i++) {
1617 evsel->idx = i;
1618
1619 /*
1620 * must read entire on-file attr struct to
1621 * sync up with layout.
1622 */
1623 if (__do_read(ff, buf, sz))
1624 goto error;
1625
1626 if (ff->ph->needs_swap)
1627 perf_event__attr_swap(buf);
1628
1629 memcpy(&evsel->attr, buf, msz);
1630
1631 if (do_read_u32(ff, &nr))
1632 goto error;
1633
1634 if (ff->ph->needs_swap)
1635 evsel->needs_swap = true;
1636
1637 evsel->name = do_read_string(ff);
1638 if (!evsel->name)
1639 goto error;
1640
1641 if (!nr)
1642 continue;
1643
1644 id = calloc(nr, sizeof(*id));
1645 if (!id)
1646 goto error;
1647 evsel->ids = nr;
1648 evsel->id = id;
1649
1650 for (j = 0 ; j < nr; j++) {
1651 if (do_read_u64(ff, id))
1652 goto error;
1653 id++;
1654 }
1655 }
1656 out:
1657 free(buf);
1658 return events;
1659 error:
1660 free_event_desc(events);
1661 events = NULL;
1662 goto out;
1663 }
1664
1665 static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val,
1666 void *priv __maybe_unused)
1667 {
1668 return fprintf(fp, ", %s = %s", name, val);
1669 }
1670
1671 static void print_event_desc(struct feat_fd *ff, FILE *fp)
1672 {
1673 struct perf_evsel *evsel, *events;
1674 u32 j;
1675 u64 *id;
1676
1677 if (ff->events)
1678 events = ff->events;
1679 else
1680 events = read_event_desc(ff);
1681
1682 if (!events) {
1683 fprintf(fp, "# event desc: not available or unable to read\n");
1684 return;
1685 }
1686
1687 for (evsel = events; evsel->attr.size; evsel++) {
1688 fprintf(fp, "# event : name = %s, ", evsel->name);
1689
1690 if (evsel->ids) {
1691 fprintf(fp, ", id = {");
1692 for (j = 0, id = evsel->id; j < evsel->ids; j++, id++) {
1693 if (j)
1694 fputc(',', fp);
1695 fprintf(fp, " %"PRIu64, *id);
1696 }
1697 fprintf(fp, " }");
1698 }
1699
1700 perf_event_attr__fprintf(fp, &evsel->attr, __desc_attr__fprintf, NULL);
1701
1702 fputc('\n', fp);
1703 }
1704
1705 free_event_desc(events);
1706 ff->events = NULL;
1707 }
1708
1709 static void print_total_mem(struct feat_fd *ff, FILE *fp)
1710 {
1711 fprintf(fp, "# total memory : %llu kB\n", ff->ph->env.total_mem);
1712 }
1713
1714 static void print_numa_topology(struct feat_fd *ff, FILE *fp)
1715 {
1716 int i;
1717 struct numa_node *n;
1718
1719 for (i = 0; i < ff->ph->env.nr_numa_nodes; i++) {
1720 n = &ff->ph->env.numa_nodes[i];
1721
1722 fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB,"
1723 " free = %"PRIu64" kB\n",
1724 n->node, n->mem_total, n->mem_free);
1725
1726 fprintf(fp, "# node%u cpu list : ", n->node);
1727 cpu_map__fprintf(n->map, fp);
1728 }
1729 }
1730
1731 static void print_cpuid(struct feat_fd *ff, FILE *fp)
1732 {
1733 fprintf(fp, "# cpuid : %s\n", ff->ph->env.cpuid);
1734 }
1735
1736 static void print_branch_stack(struct feat_fd *ff __maybe_unused, FILE *fp)
1737 {
1738 fprintf(fp, "# contains samples with branch stack\n");
1739 }
1740
1741 static void print_auxtrace(struct feat_fd *ff __maybe_unused, FILE *fp)
1742 {
1743 fprintf(fp, "# contains AUX area data (e.g. instruction trace)\n");
1744 }
1745
1746 static void print_stat(struct feat_fd *ff __maybe_unused, FILE *fp)
1747 {
1748 fprintf(fp, "# contains stat data\n");
1749 }
1750
1751 static void print_cache(struct feat_fd *ff, FILE *fp __maybe_unused)
1752 {
1753 int i;
1754
1755 fprintf(fp, "# CPU cache info:\n");
1756 for (i = 0; i < ff->ph->env.caches_cnt; i++) {
1757 fprintf(fp, "# ");
1758 cpu_cache_level__fprintf(fp, &ff->ph->env.caches[i]);
1759 }
1760 }
1761
1762 static void print_compressed(struct feat_fd *ff, FILE *fp)
1763 {
1764 fprintf(fp, "# compressed : %s, level = %d, ratio = %d\n",
1765 ff->ph->env.comp_type == PERF_COMP_ZSTD ? "Zstd" : "Unknown",
1766 ff->ph->env.comp_level, ff->ph->env.comp_ratio);
1767 }
1768
1769 static void print_pmu_mappings(struct feat_fd *ff, FILE *fp)
1770 {
1771 const char *delimiter = "# pmu mappings: ";
1772 char *str, *tmp;
1773 u32 pmu_num;
1774 u32 type;
1775
1776 pmu_num = ff->ph->env.nr_pmu_mappings;
1777 if (!pmu_num) {
1778 fprintf(fp, "# pmu mappings: not available\n");
1779 return;
1780 }
1781
1782 str = ff->ph->env.pmu_mappings;
1783
1784 while (pmu_num) {
1785 type = strtoul(str, &tmp, 0);
1786 if (*tmp != ':')
1787 goto error;
1788
1789 str = tmp + 1;
1790 fprintf(fp, "%s%s = %" PRIu32, delimiter, str, type);
1791
1792 delimiter = ", ";
1793 str += strlen(str) + 1;
1794 pmu_num--;
1795 }
1796
1797 fprintf(fp, "\n");
1798
1799 if (!pmu_num)
1800 return;
1801 error:
1802 fprintf(fp, "# pmu mappings: unable to read\n");
1803 }
1804
1805 static void print_group_desc(struct feat_fd *ff, FILE *fp)
1806 {
1807 struct perf_session *session;
1808 struct perf_evsel *evsel;
1809 u32 nr = 0;
1810
1811 session = container_of(ff->ph, struct perf_session, header);
1812
1813 evlist__for_each_entry(session->evlist, evsel) {
1814 if (perf_evsel__is_group_leader(evsel) &&
1815 evsel->nr_members > 1) {
1816 fprintf(fp, "# group: %s{%s", evsel->group_name ?: "",
1817 perf_evsel__name(evsel));
1818
1819 nr = evsel->nr_members - 1;
1820 } else if (nr) {
1821 fprintf(fp, ",%s", perf_evsel__name(evsel));
1822
1823 if (--nr == 0)
1824 fprintf(fp, "}\n");
1825 }
1826 }
1827 }
1828
1829 static void print_sample_time(struct feat_fd *ff, FILE *fp)
1830 {
1831 struct perf_session *session;
1832 char time_buf[32];
1833 double d;
1834
1835 session = container_of(ff->ph, struct perf_session, header);
1836
1837 timestamp__scnprintf_usec(session->evlist->first_sample_time,
1838 time_buf, sizeof(time_buf));
1839 fprintf(fp, "# time of first sample : %s\n", time_buf);
1840
1841 timestamp__scnprintf_usec(session->evlist->last_sample_time,
1842 time_buf, sizeof(time_buf));
1843 fprintf(fp, "# time of last sample : %s\n", time_buf);
1844
1845 d = (double)(session->evlist->last_sample_time -
1846 session->evlist->first_sample_time) / NSEC_PER_MSEC;
1847
1848 fprintf(fp, "# sample duration : %10.3f ms\n", d);
1849 }
1850
1851 static void memory_node__fprintf(struct memory_node *n,
1852 unsigned long long bsize, FILE *fp)
1853 {
1854 char buf_map[100], buf_size[50];
1855 unsigned long long size;
1856
1857 size = bsize * bitmap_weight(n->set, n->size);
1858 unit_number__scnprintf(buf_size, 50, size);
1859
1860 bitmap_scnprintf(n->set, n->size, buf_map, 100);
1861 fprintf(fp, "# %3" PRIu64 " [%s]: %s\n", n->node, buf_size, buf_map);
1862 }
1863
1864 static void print_mem_topology(struct feat_fd *ff, FILE *fp)
1865 {
1866 struct memory_node *nodes;
1867 int i, nr;
1868
1869 nodes = ff->ph->env.memory_nodes;
1870 nr = ff->ph->env.nr_memory_nodes;
1871
1872 fprintf(fp, "# memory nodes (nr %d, block size 0x%llx):\n",
1873 nr, ff->ph->env.memory_bsize);
1874
1875 for (i = 0; i < nr; i++) {
1876 memory_node__fprintf(&nodes[i], ff->ph->env.memory_bsize, fp);
1877 }
1878 }
1879
1880 static int __event_process_build_id(struct build_id_event *bev,
1881 char *filename,
1882 struct perf_session *session)
1883 {
1884 int err = -1;
1885 struct machine *machine;
1886 u16 cpumode;
1887 struct dso *dso;
1888 enum dso_kernel_type dso_type;
1889
1890 machine = perf_session__findnew_machine(session, bev->pid);
1891 if (!machine)
1892 goto out;
1893
1894 cpumode = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1895
1896 switch (cpumode) {
1897 case PERF_RECORD_MISC_KERNEL:
1898 dso_type = DSO_TYPE_KERNEL;
1899 break;
1900 case PERF_RECORD_MISC_GUEST_KERNEL:
1901 dso_type = DSO_TYPE_GUEST_KERNEL;
1902 break;
1903 case PERF_RECORD_MISC_USER:
1904 case PERF_RECORD_MISC_GUEST_USER:
1905 dso_type = DSO_TYPE_USER;
1906 break;
1907 default:
1908 goto out;
1909 }
1910
1911 dso = machine__findnew_dso(machine, filename);
1912 if (dso != NULL) {
1913 char sbuild_id[SBUILD_ID_SIZE];
1914
1915 dso__set_build_id(dso, &bev->build_id);
1916
1917 if (dso_type != DSO_TYPE_USER) {
1918 struct kmod_path m = { .name = NULL, };
1919
1920 if (!kmod_path__parse_name(&m, filename) && m.kmod)
1921 dso__set_module_info(dso, &m, machine);
1922 else
1923 dso->kernel = dso_type;
1924
1925 free(m.name);
1926 }
1927
1928 build_id__sprintf(dso->build_id, sizeof(dso->build_id),
1929 sbuild_id);
1930 pr_debug("build id event received for %s: %s\n",
1931 dso->long_name, sbuild_id);
1932 dso__put(dso);
1933 }
1934
1935 err = 0;
1936 out:
1937 return err;
1938 }
1939
1940 static int perf_header__read_build_ids_abi_quirk(struct perf_header *header,
1941 int input, u64 offset, u64 size)
1942 {
1943 struct perf_session *session = container_of(header, struct perf_session, header);
1944 struct {
1945 struct perf_event_header header;
1946 u8 build_id[PERF_ALIGN(BUILD_ID_SIZE, sizeof(u64))];
1947 char filename[0];
1948 } old_bev;
1949 struct build_id_event bev;
1950 char filename[PATH_MAX];
1951 u64 limit = offset + size;
1952
1953 while (offset < limit) {
1954 ssize_t len;
1955
1956 if (readn(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev))
1957 return -1;
1958
1959 if (header->needs_swap)
1960 perf_event_header__bswap(&old_bev.header);
1961
1962 len = old_bev.header.size - sizeof(old_bev);
1963 if (readn(input, filename, len) != len)
1964 return -1;
1965
1966 bev.header = old_bev.header;
1967
1968 /*
1969 * As the pid is the missing value, we need to fill
1970 * it properly. The header.misc value give us nice hint.
1971 */
1972 bev.pid = HOST_KERNEL_ID;
1973 if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER ||
1974 bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL)
1975 bev.pid = DEFAULT_GUEST_KERNEL_ID;
1976
1977 memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id));
1978 __event_process_build_id(&bev, filename, session);
1979
1980 offset += bev.header.size;
1981 }
1982
1983 return 0;
1984 }
1985
1986 static int perf_header__read_build_ids(struct perf_header *header,
1987 int input, u64 offset, u64 size)
1988 {
1989 struct perf_session *session = container_of(header, struct perf_session, header);
1990 struct build_id_event bev;
1991 char filename[PATH_MAX];
1992 u64 limit = offset + size, orig_offset = offset;
1993 int err = -1;
1994
1995 while (offset < limit) {
1996 ssize_t len;
1997
1998 if (readn(input, &bev, sizeof(bev)) != sizeof(bev))
1999 goto out;
2000
2001 if (header->needs_swap)
2002 perf_event_header__bswap(&bev.header);
2003
2004 len = bev.header.size - sizeof(bev);
2005 if (readn(input, filename, len) != len)
2006 goto out;
2007 /*
2008 * The a1645ce1 changeset:
2009 *
2010 * "perf: 'perf kvm' tool for monitoring guest performance from host"
2011 *
2012 * Added a field to struct build_id_event that broke the file
2013 * format.
2014 *
2015 * Since the kernel build-id is the first entry, process the
2016 * table using the old format if the well known
2017 * '[kernel.kallsyms]' string for the kernel build-id has the
2018 * first 4 characters chopped off (where the pid_t sits).
2019 */
2020 if (memcmp(filename, "nel.kallsyms]", 13) == 0) {
2021 if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1)
2022 return -1;
2023 return perf_header__read_build_ids_abi_quirk(header, input, offset, size);
2024 }
2025
2026 __event_process_build_id(&bev, filename, session);
2027
2028 offset += bev.header.size;
2029 }
2030 err = 0;
2031 out:
2032 return err;
2033 }
2034
2035 /* Macro for features that simply need to read and store a string. */
2036 #define FEAT_PROCESS_STR_FUN(__feat, __feat_env) \
2037 static int process_##__feat(struct feat_fd *ff, void *data __maybe_unused) \
2038 {\
2039 ff->ph->env.__feat_env = do_read_string(ff); \
2040 return ff->ph->env.__feat_env ? 0 : -ENOMEM; \
2041 }
2042
2043 FEAT_PROCESS_STR_FUN(hostname, hostname);
2044 FEAT_PROCESS_STR_FUN(osrelease, os_release);
2045 FEAT_PROCESS_STR_FUN(version, version);
2046 FEAT_PROCESS_STR_FUN(arch, arch);
2047 FEAT_PROCESS_STR_FUN(cpudesc, cpu_desc);
2048 FEAT_PROCESS_STR_FUN(cpuid, cpuid);
2049
2050 static int process_tracing_data(struct feat_fd *ff, void *data)
2051 {
2052 ssize_t ret = trace_report(ff->fd, data, false);
2053
2054 return ret < 0 ? -1 : 0;
2055 }
2056
2057 static int process_build_id(struct feat_fd *ff, void *data __maybe_unused)
2058 {
2059 if (perf_header__read_build_ids(ff->ph, ff->fd, ff->offset, ff->size))
2060 pr_debug("Failed to read buildids, continuing...\n");
2061 return 0;
2062 }
2063
2064 static int process_nrcpus(struct feat_fd *ff, void *data __maybe_unused)
2065 {
2066 int ret;
2067 u32 nr_cpus_avail, nr_cpus_online;
2068
2069 ret = do_read_u32(ff, &nr_cpus_avail);
2070 if (ret)
2071 return ret;
2072
2073 ret = do_read_u32(ff, &nr_cpus_online);
2074 if (ret)
2075 return ret;
2076 ff->ph->env.nr_cpus_avail = (int)nr_cpus_avail;
2077 ff->ph->env.nr_cpus_online = (int)nr_cpus_online;
2078 return 0;
2079 }
2080
2081 static int process_total_mem(struct feat_fd *ff, void *data __maybe_unused)
2082 {
2083 u64 total_mem;
2084 int ret;
2085
2086 ret = do_read_u64(ff, &total_mem);
2087 if (ret)
2088 return -1;
2089 ff->ph->env.total_mem = (unsigned long long)total_mem;
2090 return 0;
2091 }
2092
2093 static struct perf_evsel *
2094 perf_evlist__find_by_index(struct perf_evlist *evlist, int idx)
2095 {
2096 struct perf_evsel *evsel;
2097
2098 evlist__for_each_entry(evlist, evsel) {
2099 if (evsel->idx == idx)
2100 return evsel;
2101 }
2102
2103 return NULL;
2104 }
2105
2106 static void
2107 perf_evlist__set_event_name(struct perf_evlist *evlist,
2108 struct perf_evsel *event)
2109 {
2110 struct perf_evsel *evsel;
2111
2112 if (!event->name)
2113 return;
2114
2115 evsel = perf_evlist__find_by_index(evlist, event->idx);
2116 if (!evsel)
2117 return;
2118
2119 if (evsel->name)
2120 return;
2121
2122 evsel->name = strdup(event->name);
2123 }
2124
2125 static int
2126 process_event_desc(struct feat_fd *ff, void *data __maybe_unused)
2127 {
2128 struct perf_session *session;
2129 struct perf_evsel *evsel, *events = read_event_desc(ff);
2130
2131 if (!events)
2132 return 0;
2133
2134 session = container_of(ff->ph, struct perf_session, header);
2135
2136 if (session->data->is_pipe) {
2137 /* Save events for reading later by print_event_desc,
2138 * since they can't be read again in pipe mode. */
2139 ff->events = events;
2140 }
2141
2142 for (evsel = events; evsel->attr.size; evsel++)
2143 perf_evlist__set_event_name(session->evlist, evsel);
2144
2145 if (!session->data->is_pipe)
2146 free_event_desc(events);
2147
2148 return 0;
2149 }
2150
2151 static int process_cmdline(struct feat_fd *ff, void *data __maybe_unused)
2152 {
2153 char *str, *cmdline = NULL, **argv = NULL;
2154 u32 nr, i, len = 0;
2155
2156 if (do_read_u32(ff, &nr))
2157 return -1;
2158
2159 ff->ph->env.nr_cmdline = nr;
2160
2161 cmdline = zalloc(ff->size + nr + 1);
2162 if (!cmdline)
2163 return -1;
2164
2165 argv = zalloc(sizeof(char *) * (nr + 1));
2166 if (!argv)
2167 goto error;
2168
2169 for (i = 0; i < nr; i++) {
2170 str = do_read_string(ff);
2171 if (!str)
2172 goto error;
2173
2174 argv[i] = cmdline + len;
2175 memcpy(argv[i], str, strlen(str) + 1);
2176 len += strlen(str) + 1;
2177 free(str);
2178 }
2179 ff->ph->env.cmdline = cmdline;
2180 ff->ph->env.cmdline_argv = (const char **) argv;
2181 return 0;
2182
2183 error:
2184 free(argv);
2185 free(cmdline);
2186 return -1;
2187 }
2188
2189 static int process_cpu_topology(struct feat_fd *ff, void *data __maybe_unused)
2190 {
2191 u32 nr, i;
2192 char *str;
2193 struct strbuf sb;
2194 int cpu_nr = ff->ph->env.nr_cpus_avail;
2195 u64 size = 0;
2196 struct perf_header *ph = ff->ph;
2197 bool do_core_id_test = true;
2198
2199 ph->env.cpu = calloc(cpu_nr, sizeof(*ph->env.cpu));
2200 if (!ph->env.cpu)
2201 return -1;
2202
2203 if (do_read_u32(ff, &nr))
2204 goto free_cpu;
2205
2206 ph->env.nr_sibling_cores = nr;
2207 size += sizeof(u32);
2208 if (strbuf_init(&sb, 128) < 0)
2209 goto free_cpu;
2210
2211 for (i = 0; i < nr; i++) {
2212 str = do_read_string(ff);
2213 if (!str)
2214 goto error;
2215
2216 /* include a NULL character at the end */
2217 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
2218 goto error;
2219 size += string_size(str);
2220 free(str);
2221 }
2222 ph->env.sibling_cores = strbuf_detach(&sb, NULL);
2223
2224 if (do_read_u32(ff, &nr))
2225 return -1;
2226
2227 ph->env.nr_sibling_threads = nr;
2228 size += sizeof(u32);
2229
2230 for (i = 0; i < nr; i++) {
2231 str = do_read_string(ff);
2232 if (!str)
2233 goto error;
2234
2235 /* include a NULL character at the end */
2236 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
2237 goto error;
2238 size += string_size(str);
2239 free(str);
2240 }
2241 ph->env.sibling_threads = strbuf_detach(&sb, NULL);
2242
2243 /*
2244 * The header may be from old perf,
2245 * which doesn't include core id and socket id information.
2246 */
2247 if (ff->size <= size) {
2248 zfree(&ph->env.cpu);
2249 return 0;
2250 }
2251
2252 /* On s390 the socket_id number is not related to the numbers of cpus.
2253 * The socket_id number might be higher than the numbers of cpus.
2254 * This depends on the configuration.
2255 */
2256 if (ph->env.arch && !strncmp(ph->env.arch, "s390", 4))
2257 do_core_id_test = false;
2258
2259 for (i = 0; i < (u32)cpu_nr; i++) {
2260 if (do_read_u32(ff, &nr))
2261 goto free_cpu;
2262
2263 ph->env.cpu[i].core_id = nr;
2264 size += sizeof(u32);
2265
2266 if (do_read_u32(ff, &nr))
2267 goto free_cpu;
2268
2269 if (do_core_id_test && nr != (u32)-1 && nr > (u32)cpu_nr) {
2270 pr_debug("socket_id number is too big."
2271 "You may need to upgrade the perf tool.\n");
2272 goto free_cpu;
2273 }
2274
2275 ph->env.cpu[i].socket_id = nr;
2276 size += sizeof(u32);
2277 }
2278
2279 /*
2280 * The header may be from old perf,
2281 * which doesn't include die information.
2282 */
2283 if (ff->size <= size)
2284 return 0;
2285
2286 if (do_read_u32(ff, &nr))
2287 return -1;
2288
2289 ph->env.nr_sibling_dies = nr;
2290 size += sizeof(u32);
2291
2292 for (i = 0; i < nr; i++) {
2293 str = do_read_string(ff);
2294 if (!str)
2295 goto error;
2296
2297 /* include a NULL character at the end */
2298 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
2299 goto error;
2300 size += string_size(str);
2301 free(str);
2302 }
2303 ph->env.sibling_dies = strbuf_detach(&sb, NULL);
2304
2305 for (i = 0; i < (u32)cpu_nr; i++) {
2306 if (do_read_u32(ff, &nr))
2307 goto free_cpu;
2308
2309 ph->env.cpu[i].die_id = nr;
2310 }
2311
2312 return 0;
2313
2314 error:
2315 strbuf_release(&sb);
2316 free_cpu:
2317 zfree(&ph->env.cpu);
2318 return -1;
2319 }
2320
2321 static int process_numa_topology(struct feat_fd *ff, void *data __maybe_unused)
2322 {
2323 struct numa_node *nodes, *n;
2324 u32 nr, i;
2325 char *str;
2326
2327 /* nr nodes */
2328 if (do_read_u32(ff, &nr))
2329 return -1;
2330
2331 nodes = zalloc(sizeof(*nodes) * nr);
2332 if (!nodes)
2333 return -ENOMEM;
2334
2335 for (i = 0; i < nr; i++) {
2336 n = &nodes[i];
2337
2338 /* node number */
2339 if (do_read_u32(ff, &n->node))
2340 goto error;
2341
2342 if (do_read_u64(ff, &n->mem_total))
2343 goto error;
2344
2345 if (do_read_u64(ff, &n->mem_free))
2346 goto error;
2347
2348 str = do_read_string(ff);
2349 if (!str)
2350 goto error;
2351
2352 n->map = cpu_map__new(str);
2353 if (!n->map)
2354 goto error;
2355
2356 free(str);
2357 }
2358 ff->ph->env.nr_numa_nodes = nr;
2359 ff->ph->env.numa_nodes = nodes;
2360 return 0;
2361
2362 error:
2363 free(nodes);
2364 return -1;
2365 }
2366
2367 static int process_pmu_mappings(struct feat_fd *ff, void *data __maybe_unused)
2368 {
2369 char *name;
2370 u32 pmu_num;
2371 u32 type;
2372 struct strbuf sb;
2373
2374 if (do_read_u32(ff, &pmu_num))
2375 return -1;
2376
2377 if (!pmu_num) {
2378 pr_debug("pmu mappings not available\n");
2379 return 0;
2380 }
2381
2382 ff->ph->env.nr_pmu_mappings = pmu_num;
2383 if (strbuf_init(&sb, 128) < 0)
2384 return -1;
2385
2386 while (pmu_num) {
2387 if (do_read_u32(ff, &type))
2388 goto error;
2389
2390 name = do_read_string(ff);
2391 if (!name)
2392 goto error;
2393
2394 if (strbuf_addf(&sb, "%u:%s", type, name) < 0)
2395 goto error;
2396 /* include a NULL character at the end */
2397 if (strbuf_add(&sb, "", 1) < 0)
2398 goto error;
2399
2400 if (!strcmp(name, "msr"))
2401 ff->ph->env.msr_pmu_type = type;
2402
2403 free(name);
2404 pmu_num--;
2405 }
2406 ff->ph->env.pmu_mappings = strbuf_detach(&sb, NULL);
2407 return 0;
2408
2409 error:
2410 strbuf_release(&sb);
2411 return -1;
2412 }
2413
2414 static int process_group_desc(struct feat_fd *ff, void *data __maybe_unused)
2415 {
2416 size_t ret = -1;
2417 u32 i, nr, nr_groups;
2418 struct perf_session *session;
2419 struct perf_evsel *evsel, *leader = NULL;
2420 struct group_desc {
2421 char *name;
2422 u32 leader_idx;
2423 u32 nr_members;
2424 } *desc;
2425
2426 if (do_read_u32(ff, &nr_groups))
2427 return -1;
2428
2429 ff->ph->env.nr_groups = nr_groups;
2430 if (!nr_groups) {
2431 pr_debug("group desc not available\n");
2432 return 0;
2433 }
2434
2435 desc = calloc(nr_groups, sizeof(*desc));
2436 if (!desc)
2437 return -1;
2438
2439 for (i = 0; i < nr_groups; i++) {
2440 desc[i].name = do_read_string(ff);
2441 if (!desc[i].name)
2442 goto out_free;
2443
2444 if (do_read_u32(ff, &desc[i].leader_idx))
2445 goto out_free;
2446
2447 if (do_read_u32(ff, &desc[i].nr_members))
2448 goto out_free;
2449 }
2450
2451 /*
2452 * Rebuild group relationship based on the group_desc
2453 */
2454 session = container_of(ff->ph, struct perf_session, header);
2455 session->evlist->nr_groups = nr_groups;
2456
2457 i = nr = 0;
2458 evlist__for_each_entry(session->evlist, evsel) {
2459 if (evsel->idx == (int) desc[i].leader_idx) {
2460 evsel->leader = evsel;
2461 /* {anon_group} is a dummy name */
2462 if (strcmp(desc[i].name, "{anon_group}")) {
2463 evsel->group_name = desc[i].name;
2464 desc[i].name = NULL;
2465 }
2466 evsel->nr_members = desc[i].nr_members;
2467
2468 if (i >= nr_groups || nr > 0) {
2469 pr_debug("invalid group desc\n");
2470 goto out_free;
2471 }
2472
2473 leader = evsel;
2474 nr = evsel->nr_members - 1;
2475 i++;
2476 } else if (nr) {
2477 /* This is a group member */
2478 evsel->leader = leader;
2479
2480 nr--;
2481 }
2482 }
2483
2484 if (i != nr_groups || nr != 0) {
2485 pr_debug("invalid group desc\n");
2486 goto out_free;
2487 }
2488
2489 ret = 0;
2490 out_free:
2491 for (i = 0; i < nr_groups; i++)
2492 zfree(&desc[i].name);
2493 free(desc);
2494
2495 return ret;
2496 }
2497
2498 static int process_auxtrace(struct feat_fd *ff, void *data __maybe_unused)
2499 {
2500 struct perf_session *session;
2501 int err;
2502
2503 session = container_of(ff->ph, struct perf_session, header);
2504
2505 err = auxtrace_index__process(ff->fd, ff->size, session,
2506 ff->ph->needs_swap);
2507 if (err < 0)
2508 pr_err("Failed to process auxtrace index\n");
2509 return err;
2510 }
2511
2512 static int process_cache(struct feat_fd *ff, void *data __maybe_unused)
2513 {
2514 struct cpu_cache_level *caches;
2515 u32 cnt, i, version;
2516
2517 if (do_read_u32(ff, &version))
2518 return -1;
2519
2520 if (version != 1)
2521 return -1;
2522
2523 if (do_read_u32(ff, &cnt))
2524 return -1;
2525
2526 caches = zalloc(sizeof(*caches) * cnt);
2527 if (!caches)
2528 return -1;
2529
2530 for (i = 0; i < cnt; i++) {
2531 struct cpu_cache_level c;
2532
2533 #define _R(v) \
2534 if (do_read_u32(ff, &c.v))\
2535 goto out_free_caches; \
2536
2537 _R(level)
2538 _R(line_size)
2539 _R(sets)
2540 _R(ways)
2541 #undef _R
2542
2543 #define _R(v) \
2544 c.v = do_read_string(ff); \
2545 if (!c.v) \
2546 goto out_free_caches;
2547
2548 _R(type)
2549 _R(size)
2550 _R(map)
2551 #undef _R
2552
2553 caches[i] = c;
2554 }
2555
2556 ff->ph->env.caches = caches;
2557 ff->ph->env.caches_cnt = cnt;
2558 return 0;
2559 out_free_caches:
2560 free(caches);
2561 return -1;
2562 }
2563
2564 static int process_sample_time(struct feat_fd *ff, void *data __maybe_unused)
2565 {
2566 struct perf_session *session;
2567 u64 first_sample_time, last_sample_time;
2568 int ret;
2569
2570 session = container_of(ff->ph, struct perf_session, header);
2571
2572 ret = do_read_u64(ff, &first_sample_time);
2573 if (ret)
2574 return -1;
2575
2576 ret = do_read_u64(ff, &last_sample_time);
2577 if (ret)
2578 return -1;
2579
2580 session->evlist->first_sample_time = first_sample_time;
2581 session->evlist->last_sample_time = last_sample_time;
2582 return 0;
2583 }
2584
2585 static int process_mem_topology(struct feat_fd *ff,
2586 void *data __maybe_unused)
2587 {
2588 struct memory_node *nodes;
2589 u64 version, i, nr, bsize;
2590 int ret = -1;
2591
2592 if (do_read_u64(ff, &version))
2593 return -1;
2594
2595 if (version != 1)
2596 return -1;
2597
2598 if (do_read_u64(ff, &bsize))
2599 return -1;
2600
2601 if (do_read_u64(ff, &nr))
2602 return -1;
2603
2604 nodes = zalloc(sizeof(*nodes) * nr);
2605 if (!nodes)
2606 return -1;
2607
2608 for (i = 0; i < nr; i++) {
2609 struct memory_node n;
2610
2611 #define _R(v) \
2612 if (do_read_u64(ff, &n.v)) \
2613 goto out; \
2614
2615 _R(node)
2616 _R(size)
2617
2618 #undef _R
2619
2620 if (do_read_bitmap(ff, &n.set, &n.size))
2621 goto out;
2622
2623 nodes[i] = n;
2624 }
2625
2626 ff->ph->env.memory_bsize = bsize;
2627 ff->ph->env.memory_nodes = nodes;
2628 ff->ph->env.nr_memory_nodes = nr;
2629 ret = 0;
2630
2631 out:
2632 if (ret)
2633 free(nodes);
2634 return ret;
2635 }
2636
2637 static int process_clockid(struct feat_fd *ff,
2638 void *data __maybe_unused)
2639 {
2640 if (do_read_u64(ff, &ff->ph->env.clockid_res_ns))
2641 return -1;
2642
2643 return 0;
2644 }
2645
2646 static int process_dir_format(struct feat_fd *ff,
2647 void *_data __maybe_unused)
2648 {
2649 struct perf_session *session;
2650 struct perf_data *data;
2651
2652 session = container_of(ff->ph, struct perf_session, header);
2653 data = session->data;
2654
2655 if (WARN_ON(!perf_data__is_dir(data)))
2656 return -1;
2657
2658 return do_read_u64(ff, &data->dir.version);
2659 }
2660
2661 #ifdef HAVE_LIBBPF_SUPPORT
2662 static int process_bpf_prog_info(struct feat_fd *ff, void *data __maybe_unused)
2663 {
2664 struct bpf_prog_info_linear *info_linear;
2665 struct bpf_prog_info_node *info_node;
2666 struct perf_env *env = &ff->ph->env;
2667 u32 count, i;
2668 int err = -1;
2669
2670 if (ff->ph->needs_swap) {
2671 pr_warning("interpreting bpf_prog_info from systems with endianity is not yet supported\n");
2672 return 0;
2673 }
2674
2675 if (do_read_u32(ff, &count))
2676 return -1;
2677
2678 down_write(&env->bpf_progs.lock);
2679
2680 for (i = 0; i < count; ++i) {
2681 u32 info_len, data_len;
2682
2683 info_linear = NULL;
2684 info_node = NULL;
2685 if (do_read_u32(ff, &info_len))
2686 goto out;
2687 if (do_read_u32(ff, &data_len))
2688 goto out;
2689
2690 if (info_len > sizeof(struct bpf_prog_info)) {
2691 pr_warning("detected invalid bpf_prog_info\n");
2692 goto out;
2693 }
2694
2695 info_linear = malloc(sizeof(struct bpf_prog_info_linear) +
2696 data_len);
2697 if (!info_linear)
2698 goto out;
2699 info_linear->info_len = sizeof(struct bpf_prog_info);
2700 info_linear->data_len = data_len;
2701 if (do_read_u64(ff, (u64 *)(&info_linear->arrays)))
2702 goto out;
2703 if (__do_read(ff, &info_linear->info, info_len))
2704 goto out;
2705 if (info_len < sizeof(struct bpf_prog_info))
2706 memset(((void *)(&info_linear->info)) + info_len, 0,
2707 sizeof(struct bpf_prog_info) - info_len);
2708
2709 if (__do_read(ff, info_linear->data, data_len))
2710 goto out;
2711
2712 info_node = malloc(sizeof(struct bpf_prog_info_node));
2713 if (!info_node)
2714 goto out;
2715
2716 /* after reading from file, translate offset to address */
2717 bpf_program__bpil_offs_to_addr(info_linear);
2718 info_node->info_linear = info_linear;
2719 perf_env__insert_bpf_prog_info(env, info_node);
2720 }
2721
2722 up_write(&env->bpf_progs.lock);
2723 return 0;
2724 out:
2725 free(info_linear);
2726 free(info_node);
2727 up_write(&env->bpf_progs.lock);
2728 return err;
2729 }
2730 #else // HAVE_LIBBPF_SUPPORT
2731 static int process_bpf_prog_info(struct feat_fd *ff __maybe_unused, void *data __maybe_unused)
2732 {
2733 return 0;
2734 }
2735 #endif // HAVE_LIBBPF_SUPPORT
2736
2737 static int process_bpf_btf(struct feat_fd *ff, void *data __maybe_unused)
2738 {
2739 struct perf_env *env = &ff->ph->env;
2740 struct btf_node *node = NULL;
2741 u32 count, i;
2742 int err = -1;
2743
2744 if (ff->ph->needs_swap) {
2745 pr_warning("interpreting btf from systems with endianity is not yet supported\n");
2746 return 0;
2747 }
2748
2749 if (do_read_u32(ff, &count))
2750 return -1;
2751
2752 down_write(&env->bpf_progs.lock);
2753
2754 for (i = 0; i < count; ++i) {
2755 u32 id, data_size;
2756
2757 if (do_read_u32(ff, &id))
2758 goto out;
2759 if (do_read_u32(ff, &data_size))
2760 goto out;
2761
2762 node = malloc(sizeof(struct btf_node) + data_size);
2763 if (!node)
2764 goto out;
2765
2766 node->id = id;
2767 node->data_size = data_size;
2768
2769 if (__do_read(ff, node->data, data_size))
2770 goto out;
2771
2772 perf_env__insert_btf(env, node);
2773 node = NULL;
2774 }
2775
2776 err = 0;
2777 out:
2778 up_write(&env->bpf_progs.lock);
2779 free(node);
2780 return err;
2781 }
2782
2783 static int process_compressed(struct feat_fd *ff,
2784 void *data __maybe_unused)
2785 {
2786 if (do_read_u32(ff, &(ff->ph->env.comp_ver)))
2787 return -1;
2788
2789 if (do_read_u32(ff, &(ff->ph->env.comp_type)))
2790 return -1;
2791
2792 if (do_read_u32(ff, &(ff->ph->env.comp_level)))
2793 return -1;
2794
2795 if (do_read_u32(ff, &(ff->ph->env.comp_ratio)))
2796 return -1;
2797
2798 if (do_read_u32(ff, &(ff->ph->env.comp_mmap_len)))
2799 return -1;
2800
2801 return 0;
2802 }
2803
2804 struct feature_ops {
2805 int (*write)(struct feat_fd *ff, struct perf_evlist *evlist);
2806 void (*print)(struct feat_fd *ff, FILE *fp);
2807 int (*process)(struct feat_fd *ff, void *data);
2808 const char *name;
2809 bool full_only;
2810 bool synthesize;
2811 };
2812
2813 #define FEAT_OPR(n, func, __full_only) \
2814 [HEADER_##n] = { \
2815 .name = __stringify(n), \
2816 .write = write_##func, \
2817 .print = print_##func, \
2818 .full_only = __full_only, \
2819 .process = process_##func, \
2820 .synthesize = true \
2821 }
2822
2823 #define FEAT_OPN(n, func, __full_only) \
2824 [HEADER_##n] = { \
2825 .name = __stringify(n), \
2826 .write = write_##func, \
2827 .print = print_##func, \
2828 .full_only = __full_only, \
2829 .process = process_##func \
2830 }
2831
2832 /* feature_ops not implemented: */
2833 #define print_tracing_data NULL
2834 #define print_build_id NULL
2835
2836 #define process_branch_stack NULL
2837 #define process_stat NULL
2838
2839
2840 static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
2841 FEAT_OPN(TRACING_DATA, tracing_data, false),
2842 FEAT_OPN(BUILD_ID, build_id, false),
2843 FEAT_OPR(HOSTNAME, hostname, false),
2844 FEAT_OPR(OSRELEASE, osrelease, false),
2845 FEAT_OPR(VERSION, version, false),
2846 FEAT_OPR(ARCH, arch, false),
2847 FEAT_OPR(NRCPUS, nrcpus, false),
2848 FEAT_OPR(CPUDESC, cpudesc, false),
2849 FEAT_OPR(CPUID, cpuid, false),
2850 FEAT_OPR(TOTAL_MEM, total_mem, false),
2851 FEAT_OPR(EVENT_DESC, event_desc, false),
2852 FEAT_OPR(CMDLINE, cmdline, false),
2853 FEAT_OPR(CPU_TOPOLOGY, cpu_topology, true),
2854 FEAT_OPR(NUMA_TOPOLOGY, numa_topology, true),
2855 FEAT_OPN(BRANCH_STACK, branch_stack, false),
2856 FEAT_OPR(PMU_MAPPINGS, pmu_mappings, false),
2857 FEAT_OPR(GROUP_DESC, group_desc, false),
2858 FEAT_OPN(AUXTRACE, auxtrace, false),
2859 FEAT_OPN(STAT, stat, false),
2860 FEAT_OPN(CACHE, cache, true),
2861 FEAT_OPR(SAMPLE_TIME, sample_time, false),
2862 FEAT_OPR(MEM_TOPOLOGY, mem_topology, true),
2863 FEAT_OPR(CLOCKID, clockid, false),
2864 FEAT_OPN(DIR_FORMAT, dir_format, false),
2865 FEAT_OPR(BPF_PROG_INFO, bpf_prog_info, false),
2866 FEAT_OPR(BPF_BTF, bpf_btf, false),
2867 FEAT_OPR(COMPRESSED, compressed, false),
2868 };
2869
2870 struct header_print_data {
2871 FILE *fp;
2872 bool full; /* extended list of headers */
2873 };
2874
2875 static int perf_file_section__fprintf_info(struct perf_file_section *section,
2876 struct perf_header *ph,
2877 int feat, int fd, void *data)
2878 {
2879 struct header_print_data *hd = data;
2880 struct feat_fd ff;
2881
2882 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
2883 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
2884 "%d, continuing...\n", section->offset, feat);
2885 return 0;
2886 }
2887 if (feat >= HEADER_LAST_FEATURE) {
2888 pr_warning("unknown feature %d\n", feat);
2889 return 0;
2890 }
2891 if (!feat_ops[feat].print)
2892 return 0;
2893
2894 ff = (struct feat_fd) {
2895 .fd = fd,
2896 .ph = ph,
2897 };
2898
2899 if (!feat_ops[feat].full_only || hd->full)
2900 feat_ops[feat].print(&ff, hd->fp);
2901 else
2902 fprintf(hd->fp, "# %s info available, use -I to display\n",
2903 feat_ops[feat].name);
2904
2905 return 0;
2906 }
2907
2908 int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
2909 {
2910 struct header_print_data hd;
2911 struct perf_header *header = &session->header;
2912 int fd = perf_data__fd(session->data);
2913 struct stat st;
2914 time_t stctime;
2915 int ret, bit;
2916
2917 hd.fp = fp;
2918 hd.full = full;
2919
2920 ret = fstat(fd, &st);
2921 if (ret == -1)
2922 return -1;
2923
2924 stctime = st.st_ctime;
2925 fprintf(fp, "# captured on : %s", ctime(&stctime));
2926
2927 fprintf(fp, "# header version : %u\n", header->version);
2928 fprintf(fp, "# data offset : %" PRIu64 "\n", header->data_offset);
2929 fprintf(fp, "# data size : %" PRIu64 "\n", header->data_size);
2930 fprintf(fp, "# feat offset : %" PRIu64 "\n", header->feat_offset);
2931
2932 perf_header__process_sections(header, fd, &hd,
2933 perf_file_section__fprintf_info);
2934
2935 if (session->data->is_pipe)
2936 return 0;
2937
2938 fprintf(fp, "# missing features: ");
2939 for_each_clear_bit(bit, header->adds_features, HEADER_LAST_FEATURE) {
2940 if (bit)
2941 fprintf(fp, "%s ", feat_ops[bit].name);
2942 }
2943
2944 fprintf(fp, "\n");
2945 return 0;
2946 }
2947
2948 static int do_write_feat(struct feat_fd *ff, int type,
2949 struct perf_file_section **p,
2950 struct perf_evlist *evlist)
2951 {
2952 int err;
2953 int ret = 0;
2954
2955 if (perf_header__has_feat(ff->ph, type)) {
2956 if (!feat_ops[type].write)
2957 return -1;
2958
2959 if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__))
2960 return -1;
2961
2962 (*p)->offset = lseek(ff->fd, 0, SEEK_CUR);
2963
2964 err = feat_ops[type].write(ff, evlist);
2965 if (err < 0) {
2966 pr_debug("failed to write feature %s\n", feat_ops[type].name);
2967
2968 /* undo anything written */
2969 lseek(ff->fd, (*p)->offset, SEEK_SET);
2970
2971 return -1;
2972 }
2973 (*p)->size = lseek(ff->fd, 0, SEEK_CUR) - (*p)->offset;
2974 (*p)++;
2975 }
2976 return ret;
2977 }
2978
2979 static int perf_header__adds_write(struct perf_header *header,
2980 struct perf_evlist *evlist, int fd)
2981 {
2982 int nr_sections;
2983 struct feat_fd ff;
2984 struct perf_file_section *feat_sec, *p;
2985 int sec_size;
2986 u64 sec_start;
2987 int feat;
2988 int err;
2989
2990 ff = (struct feat_fd){
2991 .fd = fd,
2992 .ph = header,
2993 };
2994
2995 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
2996 if (!nr_sections)
2997 return 0;
2998
2999 feat_sec = p = calloc(nr_sections, sizeof(*feat_sec));
3000 if (feat_sec == NULL)
3001 return -ENOMEM;
3002
3003 sec_size = sizeof(*feat_sec) * nr_sections;
3004
3005 sec_start = header->feat_offset;
3006 lseek(fd, sec_start + sec_size, SEEK_SET);
3007
3008 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
3009 if (do_write_feat(&ff, feat, &p, evlist))
3010 perf_header__clear_feat(header, feat);
3011 }
3012
3013 lseek(fd, sec_start, SEEK_SET);
3014 /*
3015 * may write more than needed due to dropped feature, but
3016 * this is okay, reader will skip the missing entries
3017 */
3018 err = do_write(&ff, feat_sec, sec_size);
3019 if (err < 0)
3020 pr_debug("failed to write feature section\n");
3021 free(feat_sec);
3022 return err;
3023 }
3024
3025 int perf_header__write_pipe(int fd)
3026 {
3027 struct perf_pipe_file_header f_header;
3028 struct feat_fd ff;
3029 int err;
3030
3031 ff = (struct feat_fd){ .fd = fd };
3032
3033 f_header = (struct perf_pipe_file_header){
3034 .magic = PERF_MAGIC,
3035 .size = sizeof(f_header),
3036 };
3037
3038 err = do_write(&ff, &f_header, sizeof(f_header));
3039 if (err < 0) {
3040 pr_debug("failed to write perf pipe header\n");
3041 return err;
3042 }
3043
3044 return 0;
3045 }
3046
3047 int perf_session__write_header(struct perf_session *session,
3048 struct perf_evlist *evlist,
3049 int fd, bool at_exit)
3050 {
3051 struct perf_file_header f_header;
3052 struct perf_file_attr f_attr;
3053 struct perf_header *header = &session->header;
3054 struct perf_evsel *evsel;
3055 struct feat_fd ff;
3056 u64 attr_offset;
3057 int err;
3058
3059 ff = (struct feat_fd){ .fd = fd};
3060 lseek(fd, sizeof(f_header), SEEK_SET);
3061
3062 evlist__for_each_entry(session->evlist, evsel) {
3063 evsel->id_offset = lseek(fd, 0, SEEK_CUR);
3064 err = do_write(&ff, evsel->id, evsel->ids * sizeof(u64));
3065 if (err < 0) {
3066 pr_debug("failed to write perf header\n");
3067 return err;
3068 }
3069 }
3070
3071 attr_offset = lseek(ff.fd, 0, SEEK_CUR);
3072
3073 evlist__for_each_entry(evlist, evsel) {
3074 f_attr = (struct perf_file_attr){
3075 .attr = evsel->attr,
3076 .ids = {
3077 .offset = evsel->id_offset,
3078 .size = evsel->ids * sizeof(u64),
3079 }
3080 };
3081 err = do_write(&ff, &f_attr, sizeof(f_attr));
3082 if (err < 0) {
3083 pr_debug("failed to write perf header attribute\n");
3084 return err;
3085 }
3086 }
3087
3088 if (!header->data_offset)
3089 header->data_offset = lseek(fd, 0, SEEK_CUR);
3090 header->feat_offset = header->data_offset + header->data_size;
3091
3092 if (at_exit) {
3093 err = perf_header__adds_write(header, evlist, fd);
3094 if (err < 0)
3095 return err;
3096 }
3097
3098 f_header = (struct perf_file_header){
3099 .magic = PERF_MAGIC,
3100 .size = sizeof(f_header),
3101 .attr_size = sizeof(f_attr),
3102 .attrs = {
3103 .offset = attr_offset,
3104 .size = evlist->nr_entries * sizeof(f_attr),
3105 },
3106 .data = {
3107 .offset = header->data_offset,
3108 .size = header->data_size,
3109 },
3110 /* event_types is ignored, store zeros */
3111 };
3112
3113 memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features));
3114
3115 lseek(fd, 0, SEEK_SET);
3116 err = do_write(&ff, &f_header, sizeof(f_header));
3117 if (err < 0) {
3118 pr_debug("failed to write perf header\n");
3119 return err;
3120 }
3121 lseek(fd, header->data_offset + header->data_size, SEEK_SET);
3122
3123 return 0;
3124 }
3125
3126 static int perf_header__getbuffer64(struct perf_header *header,
3127 int fd, void *buf, size_t size)
3128 {
3129 if (readn(fd, buf, size) <= 0)
3130 return -1;
3131
3132 if (header->needs_swap)
3133 mem_bswap_64(buf, size);
3134
3135 return 0;
3136 }
3137
3138 int perf_header__process_sections(struct perf_header *header, int fd,
3139 void *data,
3140 int (*process)(struct perf_file_section *section,
3141 struct perf_header *ph,
3142 int feat, int fd, void *data))
3143 {
3144 struct perf_file_section *feat_sec, *sec;
3145 int nr_sections;
3146 int sec_size;
3147 int feat;
3148 int err;
3149
3150 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
3151 if (!nr_sections)
3152 return 0;
3153
3154 feat_sec = sec = calloc(nr_sections, sizeof(*feat_sec));
3155 if (!feat_sec)
3156 return -1;
3157
3158 sec_size = sizeof(*feat_sec) * nr_sections;
3159
3160 lseek(fd, header->feat_offset, SEEK_SET);
3161
3162 err = perf_header__getbuffer64(header, fd, feat_sec, sec_size);
3163 if (err < 0)
3164 goto out_free;
3165
3166 for_each_set_bit(feat, header->adds_features, HEADER_LAST_FEATURE) {
3167 err = process(sec++, header, feat, fd, data);
3168 if (err < 0)
3169 goto out_free;
3170 }
3171 err = 0;
3172 out_free:
3173 free(feat_sec);
3174 return err;
3175 }
3176
3177 static const int attr_file_abi_sizes[] = {
3178 [0] = PERF_ATTR_SIZE_VER0,
3179 [1] = PERF_ATTR_SIZE_VER1,
3180 [2] = PERF_ATTR_SIZE_VER2,
3181 [3] = PERF_ATTR_SIZE_VER3,
3182 [4] = PERF_ATTR_SIZE_VER4,
3183 0,
3184 };
3185
3186 /*
3187 * In the legacy file format, the magic number is not used to encode endianness.
3188 * hdr_sz was used to encode endianness. But given that hdr_sz can vary based
3189 * on ABI revisions, we need to try all combinations for all endianness to
3190 * detect the endianness.
3191 */
3192 static int try_all_file_abis(uint64_t hdr_sz, struct perf_header *ph)
3193 {
3194 uint64_t ref_size, attr_size;
3195 int i;
3196
3197 for (i = 0 ; attr_file_abi_sizes[i]; i++) {
3198 ref_size = attr_file_abi_sizes[i]
3199 + sizeof(struct perf_file_section);
3200 if (hdr_sz != ref_size) {
3201 attr_size = bswap_64(hdr_sz);
3202 if (attr_size != ref_size)
3203 continue;
3204
3205 ph->needs_swap = true;
3206 }
3207 pr_debug("ABI%d perf.data file detected, need_swap=%d\n",
3208 i,
3209 ph->needs_swap);
3210 return 0;
3211 }
3212 /* could not determine endianness */
3213 return -1;
3214 }
3215
3216 #define PERF_PIPE_HDR_VER0 16
3217
3218 static const size_t attr_pipe_abi_sizes[] = {
3219 [0] = PERF_PIPE_HDR_VER0,
3220 0,
3221 };
3222
3223 /*
3224 * In the legacy pipe format, there is an implicit assumption that endiannesss
3225 * between host recording the samples, and host parsing the samples is the
3226 * same. This is not always the case given that the pipe output may always be
3227 * redirected into a file and analyzed on a different machine with possibly a
3228 * different endianness and perf_event ABI revsions in the perf tool itself.
3229 */
3230 static int try_all_pipe_abis(uint64_t hdr_sz, struct perf_header *ph)
3231 {
3232 u64 attr_size;
3233 int i;
3234
3235 for (i = 0 ; attr_pipe_abi_sizes[i]; i++) {
3236 if (hdr_sz != attr_pipe_abi_sizes[i]) {
3237 attr_size = bswap_64(hdr_sz);
3238 if (attr_size != hdr_sz)
3239 continue;
3240
3241 ph->needs_swap = true;
3242 }
3243 pr_debug("Pipe ABI%d perf.data file detected\n", i);
3244 return 0;
3245 }
3246 return -1;
3247 }
3248
3249 bool is_perf_magic(u64 magic)
3250 {
3251 if (!memcmp(&magic, __perf_magic1, sizeof(magic))
3252 || magic == __perf_magic2
3253 || magic == __perf_magic2_sw)
3254 return true;
3255
3256 return false;
3257 }
3258
3259 static int check_magic_endian(u64 magic, uint64_t hdr_sz,
3260 bool is_pipe, struct perf_header *ph)
3261 {
3262 int ret;
3263
3264 /* check for legacy format */
3265 ret = memcmp(&magic, __perf_magic1, sizeof(magic));
3266 if (ret == 0) {
3267 ph->version = PERF_HEADER_VERSION_1;
3268 pr_debug("legacy perf.data format\n");
3269 if (is_pipe)
3270 return try_all_pipe_abis(hdr_sz, ph);
3271
3272 return try_all_file_abis(hdr_sz, ph);
3273 }
3274 /*
3275 * the new magic number serves two purposes:
3276 * - unique number to identify actual perf.data files
3277 * - encode endianness of file
3278 */
3279 ph->version = PERF_HEADER_VERSION_2;
3280
3281 /* check magic number with one endianness */
3282 if (magic == __perf_magic2)
3283 return 0;
3284
3285 /* check magic number with opposite endianness */
3286 if (magic != __perf_magic2_sw)
3287 return -1;
3288
3289 ph->needs_swap = true;
3290
3291 return 0;
3292 }
3293
3294 int perf_file_header__read(struct perf_file_header *header,
3295 struct perf_header *ph, int fd)
3296 {
3297 ssize_t ret;
3298
3299 lseek(fd, 0, SEEK_SET);
3300
3301 ret = readn(fd, header, sizeof(*header));
3302 if (ret <= 0)
3303 return -1;
3304
3305 if (check_magic_endian(header->magic,
3306 header->attr_size, false, ph) < 0) {
3307 pr_debug("magic/endian check failed\n");
3308 return -1;
3309 }
3310
3311 if (ph->needs_swap) {
3312 mem_bswap_64(header, offsetof(struct perf_file_header,
3313 adds_features));
3314 }
3315
3316 if (header->size != sizeof(*header)) {
3317 /* Support the previous format */
3318 if (header->size == offsetof(typeof(*header), adds_features))
3319 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
3320 else
3321 return -1;
3322 } else if (ph->needs_swap) {
3323 /*
3324 * feature bitmap is declared as an array of unsigned longs --
3325 * not good since its size can differ between the host that
3326 * generated the data file and the host analyzing the file.
3327 *
3328 * We need to handle endianness, but we don't know the size of
3329 * the unsigned long where the file was generated. Take a best
3330 * guess at determining it: try 64-bit swap first (ie., file
3331 * created on a 64-bit host), and check if the hostname feature
3332 * bit is set (this feature bit is forced on as of fbe96f2).
3333 * If the bit is not, undo the 64-bit swap and try a 32-bit
3334 * swap. If the hostname bit is still not set (e.g., older data
3335 * file), punt and fallback to the original behavior --
3336 * clearing all feature bits and setting buildid.
3337 */
3338 mem_bswap_64(&header->adds_features,
3339 BITS_TO_U64(HEADER_FEAT_BITS));
3340
3341 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
3342 /* unswap as u64 */
3343 mem_bswap_64(&header->adds_features,
3344 BITS_TO_U64(HEADER_FEAT_BITS));
3345
3346 /* unswap as u32 */
3347 mem_bswap_32(&header->adds_features,
3348 BITS_TO_U32(HEADER_FEAT_BITS));
3349 }
3350
3351 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
3352 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
3353 set_bit(HEADER_BUILD_ID, header->adds_features);
3354 }
3355 }
3356
3357 memcpy(&ph->adds_features, &header->adds_features,
3358 sizeof(ph->adds_features));
3359
3360 ph->data_offset = header->data.offset;
3361 ph->data_size = header->data.size;
3362 ph->feat_offset = header->data.offset + header->data.size;
3363 return 0;
3364 }
3365
3366 static int perf_file_section__process(struct perf_file_section *section,
3367 struct perf_header *ph,
3368 int feat, int fd, void *data)
3369 {
3370 struct feat_fd fdd = {
3371 .fd = fd,
3372 .ph = ph,
3373 .size = section->size,
3374 .offset = section->offset,
3375 };
3376
3377 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
3378 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
3379 "%d, continuing...\n", section->offset, feat);
3380 return 0;
3381 }
3382
3383 if (feat >= HEADER_LAST_FEATURE) {
3384 pr_debug("unknown feature %d, continuing...\n", feat);
3385 return 0;
3386 }
3387
3388 if (!feat_ops[feat].process)
3389 return 0;
3390
3391 return feat_ops[feat].process(&fdd, data);
3392 }
3393
3394 static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
3395 struct perf_header *ph, int fd,
3396 bool repipe)
3397 {
3398 struct feat_fd ff = {
3399 .fd = STDOUT_FILENO,
3400 .ph = ph,
3401 };
3402 ssize_t ret;
3403
3404 ret = readn(fd, header, sizeof(*header));
3405 if (ret <= 0)
3406 return -1;
3407
3408 if (check_magic_endian(header->magic, header->size, true, ph) < 0) {
3409 pr_debug("endian/magic failed\n");
3410 return -1;
3411 }
3412
3413 if (ph->needs_swap)
3414 header->size = bswap_64(header->size);
3415
3416 if (repipe && do_write(&ff, header, sizeof(*header)) < 0)
3417 return -1;
3418
3419 return 0;
3420 }
3421
3422 static int perf_header__read_pipe(struct perf_session *session)
3423 {
3424 struct perf_header *header = &session->header;
3425 struct perf_pipe_file_header f_header;
3426
3427 if (perf_file_header__read_pipe(&f_header, header,
3428 perf_data__fd(session->data),
3429 session->repipe) < 0) {
3430 pr_debug("incompatible file format\n");
3431 return -EINVAL;
3432 }
3433
3434 return 0;
3435 }
3436
3437 static int read_attr(int fd, struct perf_header *ph,
3438 struct perf_file_attr *f_attr)
3439 {
3440 struct perf_event_attr *attr = &f_attr->attr;
3441 size_t sz, left;
3442 size_t our_sz = sizeof(f_attr->attr);
3443 ssize_t ret;
3444
3445 memset(f_attr, 0, sizeof(*f_attr));
3446
3447 /* read minimal guaranteed structure */
3448 ret = readn(fd, attr, PERF_ATTR_SIZE_VER0);
3449 if (ret <= 0) {
3450 pr_debug("cannot read %d bytes of header attr\n",
3451 PERF_ATTR_SIZE_VER0);
3452 return -1;
3453 }
3454
3455 /* on file perf_event_attr size */
3456 sz = attr->size;
3457
3458 if (ph->needs_swap)
3459 sz = bswap_32(sz);
3460
3461 if (sz == 0) {
3462 /* assume ABI0 */
3463 sz = PERF_ATTR_SIZE_VER0;
3464 } else if (sz > our_sz) {
3465 pr_debug("file uses a more recent and unsupported ABI"
3466 " (%zu bytes extra)\n", sz - our_sz);
3467 return -1;
3468 }
3469 /* what we have not yet read and that we know about */
3470 left = sz - PERF_ATTR_SIZE_VER0;
3471 if (left) {
3472 void *ptr = attr;
3473 ptr += PERF_ATTR_SIZE_VER0;
3474
3475 ret = readn(fd, ptr, left);
3476 }
3477 /* read perf_file_section, ids are read in caller */
3478 ret = readn(fd, &f_attr->ids, sizeof(f_attr->ids));
3479
3480 return ret <= 0 ? -1 : 0;
3481 }
3482
3483 static int perf_evsel__prepare_tracepoint_event(struct perf_evsel *evsel,
3484 struct tep_handle *pevent)
3485 {
3486 struct tep_event *event;
3487 char bf[128];
3488
3489 /* already prepared */
3490 if (evsel->tp_format)
3491 return 0;
3492
3493 if (pevent == NULL) {
3494 pr_debug("broken or missing trace data\n");
3495 return -1;
3496 }
3497
3498 event = tep_find_event(pevent, evsel->attr.config);
3499 if (event == NULL) {
3500 pr_debug("cannot find event format for %d\n", (int)evsel->attr.config);
3501 return -1;
3502 }
3503
3504 if (!evsel->name) {
3505 snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name);
3506 evsel->name = strdup(bf);
3507 if (evsel->name == NULL)
3508 return -1;
3509 }
3510
3511 evsel->tp_format = event;
3512 return 0;
3513 }
3514
3515 static int perf_evlist__prepare_tracepoint_events(struct perf_evlist *evlist,
3516 struct tep_handle *pevent)
3517 {
3518 struct perf_evsel *pos;
3519
3520 evlist__for_each_entry(evlist, pos) {
3521 if (pos->attr.type == PERF_TYPE_TRACEPOINT &&
3522 perf_evsel__prepare_tracepoint_event(pos, pevent))
3523 return -1;
3524 }
3525
3526 return 0;
3527 }
3528
3529 int perf_session__read_header(struct perf_session *session)
3530 {
3531 struct perf_data *data = session->data;
3532 struct perf_header *header = &session->header;
3533 struct perf_file_header f_header;
3534 struct perf_file_attr f_attr;
3535 u64 f_id;
3536 int nr_attrs, nr_ids, i, j;
3537 int fd = perf_data__fd(data);
3538
3539 session->evlist = perf_evlist__new();
3540 if (session->evlist == NULL)
3541 return -ENOMEM;
3542
3543 session->evlist->env = &header->env;
3544 session->machines.host.env = &header->env;
3545 if (perf_data__is_pipe(data))
3546 return perf_header__read_pipe(session);
3547
3548 if (perf_file_header__read(&f_header, header, fd) < 0)
3549 return -EINVAL;
3550
3551 /*
3552 * Sanity check that perf.data was written cleanly; data size is
3553 * initialized to 0 and updated only if the on_exit function is run.
3554 * If data size is still 0 then the file contains only partial
3555 * information. Just warn user and process it as much as it can.
3556 */
3557 if (f_header.data.size == 0) {
3558 pr_warning("WARNING: The %s file's data size field is 0 which is unexpected.\n"
3559 "Was the 'perf record' command properly terminated?\n",
3560 data->file.path);
3561 }
3562
3563 nr_attrs = f_header.attrs.size / f_header.attr_size;
3564 lseek(fd, f_header.attrs.offset, SEEK_SET);
3565
3566 for (i = 0; i < nr_attrs; i++) {
3567 struct perf_evsel *evsel;
3568 off_t tmp;
3569
3570 if (read_attr(fd, header, &f_attr) < 0)
3571 goto out_errno;
3572
3573 if (header->needs_swap) {
3574 f_attr.ids.size = bswap_64(f_attr.ids.size);
3575 f_attr.ids.offset = bswap_64(f_attr.ids.offset);
3576 perf_event__attr_swap(&f_attr.attr);
3577 }
3578
3579 tmp = lseek(fd, 0, SEEK_CUR);
3580 evsel = perf_evsel__new(&f_attr.attr);
3581
3582 if (evsel == NULL)
3583 goto out_delete_evlist;
3584
3585 evsel->needs_swap = header->needs_swap;
3586 /*
3587 * Do it before so that if perf_evsel__alloc_id fails, this
3588 * entry gets purged too at perf_evlist__delete().
3589 */
3590 perf_evlist__add(session->evlist, evsel);
3591
3592 nr_ids = f_attr.ids.size / sizeof(u64);
3593 /*
3594 * We don't have the cpu and thread maps on the header, so
3595 * for allocating the perf_sample_id table we fake 1 cpu and
3596 * hattr->ids threads.
3597 */
3598 if (perf_evsel__alloc_id(evsel, 1, nr_ids))
3599 goto out_delete_evlist;
3600
3601 lseek(fd, f_attr.ids.offset, SEEK_SET);
3602
3603 for (j = 0; j < nr_ids; j++) {
3604 if (perf_header__getbuffer64(header, fd, &f_id, sizeof(f_id)))
3605 goto out_errno;
3606
3607 perf_evlist__id_add(session->evlist, evsel, 0, j, f_id);
3608 }
3609
3610 lseek(fd, tmp, SEEK_SET);
3611 }
3612
3613 perf_header__process_sections(header, fd, &session->tevent,
3614 perf_file_section__process);
3615
3616 if (perf_evlist__prepare_tracepoint_events(session->evlist,
3617 session->tevent.pevent))
3618 goto out_delete_evlist;
3619
3620 return 0;
3621 out_errno:
3622 return -errno;
3623
3624 out_delete_evlist:
3625 perf_evlist__delete(session->evlist);
3626 session->evlist = NULL;
3627 return -ENOMEM;
3628 }
3629
3630 int perf_event__synthesize_attr(struct perf_tool *tool,
3631 struct perf_event_attr *attr, u32 ids, u64 *id,
3632 perf_event__handler_t process)
3633 {
3634 union perf_event *ev;
3635 size_t size;
3636 int err;
3637
3638 size = sizeof(struct perf_event_attr);
3639 size = PERF_ALIGN(size, sizeof(u64));
3640 size += sizeof(struct perf_event_header);
3641 size += ids * sizeof(u64);
3642
3643 ev = malloc(size);
3644
3645 if (ev == NULL)
3646 return -ENOMEM;
3647
3648 ev->attr.attr = *attr;
3649 memcpy(ev->attr.id, id, ids * sizeof(u64));
3650
3651 ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
3652 ev->attr.header.size = (u16)size;
3653
3654 if (ev->attr.header.size == size)
3655 err = process(tool, ev, NULL, NULL);
3656 else
3657 err = -E2BIG;
3658
3659 free(ev);
3660
3661 return err;
3662 }
3663
3664 int perf_event__synthesize_features(struct perf_tool *tool,
3665 struct perf_session *session,
3666 struct perf_evlist *evlist,
3667 perf_event__handler_t process)
3668 {
3669 struct perf_header *header = &session->header;
3670 struct feat_fd ff;
3671 struct feature_event *fe;
3672 size_t sz, sz_hdr;
3673 int feat, ret;
3674
3675 sz_hdr = sizeof(fe->header);
3676 sz = sizeof(union perf_event);
3677 /* get a nice alignment */
3678 sz = PERF_ALIGN(sz, page_size);
3679
3680 memset(&ff, 0, sizeof(ff));
3681
3682 ff.buf = malloc(sz);
3683 if (!ff.buf)
3684 return -ENOMEM;
3685
3686 ff.size = sz - sz_hdr;
3687
3688 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
3689 if (!feat_ops[feat].synthesize) {
3690 pr_debug("No record header feature for header :%d\n", feat);
3691 continue;
3692 }
3693
3694 ff.offset = sizeof(*fe);
3695
3696 ret = feat_ops[feat].write(&ff, evlist);
3697 if (ret || ff.offset <= (ssize_t)sizeof(*fe)) {
3698 pr_debug("Error writing feature\n");
3699 continue;
3700 }
3701 /* ff.buf may have changed due to realloc in do_write() */
3702 fe = ff.buf;
3703 memset(fe, 0, sizeof(*fe));
3704
3705 fe->feat_id = feat;
3706 fe->header.type = PERF_RECORD_HEADER_FEATURE;
3707 fe->header.size = ff.offset;
3708
3709 ret = process(tool, ff.buf, NULL, NULL);
3710 if (ret) {
3711 free(ff.buf);
3712 return ret;
3713 }
3714 }
3715
3716 /* Send HEADER_LAST_FEATURE mark. */
3717 fe = ff.buf;
3718 fe->feat_id = HEADER_LAST_FEATURE;
3719 fe->header.type = PERF_RECORD_HEADER_FEATURE;
3720 fe->header.size = sizeof(*fe);
3721
3722 ret = process(tool, ff.buf, NULL, NULL);
3723
3724 free(ff.buf);
3725 return ret;
3726 }
3727
3728 int perf_event__process_feature(struct perf_session *session,
3729 union perf_event *event)
3730 {
3731 struct perf_tool *tool = session->tool;
3732 struct feat_fd ff = { .fd = 0 };
3733 struct feature_event *fe = (struct feature_event *)event;
3734 int type = fe->header.type;
3735 u64 feat = fe->feat_id;
3736
3737 if (type < 0 || type >= PERF_RECORD_HEADER_MAX) {
3738 pr_warning("invalid record type %d in pipe-mode\n", type);
3739 return 0;
3740 }
3741 if (feat == HEADER_RESERVED || feat >= HEADER_LAST_FEATURE) {
3742 pr_warning("invalid record type %d in pipe-mode\n", type);
3743 return -1;
3744 }
3745
3746 if (!feat_ops[feat].process)
3747 return 0;
3748
3749 ff.buf = (void *)fe->data;
3750 ff.size = event->header.size - sizeof(event->header);
3751 ff.ph = &session->header;
3752
3753 if (feat_ops[feat].process(&ff, NULL))
3754 return -1;
3755
3756 if (!feat_ops[feat].print || !tool->show_feat_hdr)
3757 return 0;
3758
3759 if (!feat_ops[feat].full_only ||
3760 tool->show_feat_hdr >= SHOW_FEAT_HEADER_FULL_INFO) {
3761 feat_ops[feat].print(&ff, stdout);
3762 } else {
3763 fprintf(stdout, "# %s info available, use -I to display\n",
3764 feat_ops[feat].name);
3765 }
3766
3767 return 0;
3768 }
3769
3770 static struct event_update_event *
3771 event_update_event__new(size_t size, u64 type, u64 id)
3772 {
3773 struct event_update_event *ev;
3774
3775 size += sizeof(*ev);
3776 size = PERF_ALIGN(size, sizeof(u64));
3777
3778 ev = zalloc(size);
3779 if (ev) {
3780 ev->header.type = PERF_RECORD_EVENT_UPDATE;
3781 ev->header.size = (u16)size;
3782 ev->type = type;
3783 ev->id = id;
3784 }
3785 return ev;
3786 }
3787
3788 int
3789 perf_event__synthesize_event_update_unit(struct perf_tool *tool,
3790 struct perf_evsel *evsel,
3791 perf_event__handler_t process)
3792 {
3793 struct event_update_event *ev;
3794 size_t size = strlen(evsel->unit);
3795 int err;
3796
3797 ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->id[0]);
3798 if (ev == NULL)
3799 return -ENOMEM;
3800
3801 strlcpy(ev->data, evsel->unit, size + 1);
3802 err = process(tool, (union perf_event *)ev, NULL, NULL);
3803 free(ev);
3804 return err;
3805 }
3806
3807 int
3808 perf_event__synthesize_event_update_scale(struct perf_tool *tool,
3809 struct perf_evsel *evsel,
3810 perf_event__handler_t process)
3811 {
3812 struct event_update_event *ev;
3813 struct event_update_event_scale *ev_data;
3814 int err;
3815
3816 ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->id[0]);
3817 if (ev == NULL)
3818 return -ENOMEM;
3819
3820 ev_data = (struct event_update_event_scale *) ev->data;
3821 ev_data->scale = evsel->scale;
3822 err = process(tool, (union perf_event*) ev, NULL, NULL);
3823 free(ev);
3824 return err;
3825 }
3826
3827 int
3828 perf_event__synthesize_event_update_name(struct perf_tool *tool,
3829 struct perf_evsel *evsel,
3830 perf_event__handler_t process)
3831 {
3832 struct event_update_event *ev;
3833 size_t len = strlen(evsel->name);
3834 int err;
3835
3836 ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->id[0]);
3837 if (ev == NULL)
3838 return -ENOMEM;
3839
3840 strlcpy(ev->data, evsel->name, len + 1);
3841 err = process(tool, (union perf_event*) ev, NULL, NULL);
3842 free(ev);
3843 return err;
3844 }
3845
3846 int
3847 perf_event__synthesize_event_update_cpus(struct perf_tool *tool,
3848 struct perf_evsel *evsel,
3849 perf_event__handler_t process)
3850 {
3851 size_t size = sizeof(struct event_update_event);
3852 struct event_update_event *ev;
3853 int max, err;
3854 u16 type;
3855
3856 if (!evsel->own_cpus)
3857 return 0;
3858
3859 ev = cpu_map_data__alloc(evsel->own_cpus, &size, &type, &max);
3860 if (!ev)
3861 return -ENOMEM;
3862
3863 ev->header.type = PERF_RECORD_EVENT_UPDATE;
3864 ev->header.size = (u16)size;
3865 ev->type = PERF_EVENT_UPDATE__CPUS;
3866 ev->id = evsel->id[0];
3867
3868 cpu_map_data__synthesize((struct cpu_map_data *) ev->data,
3869 evsel->own_cpus,
3870 type, max);
3871
3872 err = process(tool, (union perf_event*) ev, NULL, NULL);
3873 free(ev);
3874 return err;
3875 }
3876
3877 size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp)
3878 {
3879 struct event_update_event *ev = &event->event_update;
3880 struct event_update_event_scale *ev_scale;
3881 struct event_update_event_cpus *ev_cpus;
3882 struct cpu_map *map;
3883 size_t ret;
3884
3885 ret = fprintf(fp, "\n... id: %" PRIu64 "\n", ev->id);
3886
3887 switch (ev->type) {
3888 case PERF_EVENT_UPDATE__SCALE:
3889 ev_scale = (struct event_update_event_scale *) ev->data;
3890 ret += fprintf(fp, "... scale: %f\n", ev_scale->scale);
3891 break;
3892 case PERF_EVENT_UPDATE__UNIT:
3893 ret += fprintf(fp, "... unit: %s\n", ev->data);
3894 break;
3895 case PERF_EVENT_UPDATE__NAME:
3896 ret += fprintf(fp, "... name: %s\n", ev->data);
3897 break;
3898 case PERF_EVENT_UPDATE__CPUS:
3899 ev_cpus = (struct event_update_event_cpus *) ev->data;
3900 ret += fprintf(fp, "... ");
3901
3902 map = cpu_map__new_data(&ev_cpus->cpus);
3903 if (map)
3904 ret += cpu_map__fprintf(map, fp);
3905 else
3906 ret += fprintf(fp, "failed to get cpus\n");
3907 break;
3908 default:
3909 ret += fprintf(fp, "... unknown type\n");
3910 break;
3911 }
3912
3913 return ret;
3914 }
3915
3916 int perf_event__synthesize_attrs(struct perf_tool *tool,
3917 struct perf_evlist *evlist,
3918 perf_event__handler_t process)
3919 {
3920 struct perf_evsel *evsel;
3921 int err = 0;
3922
3923 evlist__for_each_entry(evlist, evsel) {
3924 err = perf_event__synthesize_attr(tool, &evsel->attr, evsel->ids,
3925 evsel->id, process);
3926 if (err) {
3927 pr_debug("failed to create perf header attribute\n");
3928 return err;
3929 }
3930 }
3931
3932 return err;
3933 }
3934
3935 static bool has_unit(struct perf_evsel *counter)
3936 {
3937 return counter->unit && *counter->unit;
3938 }
3939
3940 static bool has_scale(struct perf_evsel *counter)
3941 {
3942 return counter->scale != 1;
3943 }
3944
3945 int perf_event__synthesize_extra_attr(struct perf_tool *tool,
3946 struct perf_evlist *evsel_list,
3947 perf_event__handler_t process,
3948 bool is_pipe)
3949 {
3950 struct perf_evsel *counter;
3951 int err;
3952
3953 /*
3954 * Synthesize other events stuff not carried within
3955 * attr event - unit, scale, name
3956 */
3957 evlist__for_each_entry(evsel_list, counter) {
3958 if (!counter->supported)
3959 continue;
3960
3961 /*
3962 * Synthesize unit and scale only if it's defined.
3963 */
3964 if (has_unit(counter)) {
3965 err = perf_event__synthesize_event_update_unit(tool, counter, process);
3966 if (err < 0) {
3967 pr_err("Couldn't synthesize evsel unit.\n");
3968 return err;
3969 }
3970 }
3971
3972 if (has_scale(counter)) {
3973 err = perf_event__synthesize_event_update_scale(tool, counter, process);
3974 if (err < 0) {
3975 pr_err("Couldn't synthesize evsel counter.\n");
3976 return err;
3977 }
3978 }
3979
3980 if (counter->own_cpus) {
3981 err = perf_event__synthesize_event_update_cpus(tool, counter, process);
3982 if (err < 0) {
3983 pr_err("Couldn't synthesize evsel cpus.\n");
3984 return err;
3985 }
3986 }
3987
3988 /*
3989 * Name is needed only for pipe output,
3990 * perf.data carries event names.
3991 */
3992 if (is_pipe) {
3993 err = perf_event__synthesize_event_update_name(tool, counter, process);
3994 if (err < 0) {
3995 pr_err("Couldn't synthesize evsel name.\n");
3996 return err;
3997 }
3998 }
3999 }
4000 return 0;
4001 }
4002
4003 int perf_event__process_attr(struct perf_tool *tool __maybe_unused,
4004 union perf_event *event,
4005 struct perf_evlist **pevlist)
4006 {
4007 u32 i, ids, n_ids;
4008 struct perf_evsel *evsel;
4009 struct perf_evlist *evlist = *pevlist;
4010
4011 if (evlist == NULL) {
4012 *pevlist = evlist = perf_evlist__new();
4013 if (evlist == NULL)
4014 return -ENOMEM;
4015 }
4016
4017 evsel = perf_evsel__new(&event->attr.attr);
4018 if (evsel == NULL)
4019 return -ENOMEM;
4020
4021 perf_evlist__add(evlist, evsel);
4022
4023 ids = event->header.size;
4024 ids -= (void *)&event->attr.id - (void *)event;
4025 n_ids = ids / sizeof(u64);
4026 /*
4027 * We don't have the cpu and thread maps on the header, so
4028 * for allocating the perf_sample_id table we fake 1 cpu and
4029 * hattr->ids threads.
4030 */
4031 if (perf_evsel__alloc_id(evsel, 1, n_ids))
4032 return -ENOMEM;
4033
4034 for (i = 0; i < n_ids; i++) {
4035 perf_evlist__id_add(evlist, evsel, 0, i, event->attr.id[i]);
4036 }
4037
4038 return 0;
4039 }
4040
4041 int perf_event__process_event_update(struct perf_tool *tool __maybe_unused,
4042 union perf_event *event,
4043 struct perf_evlist **pevlist)
4044 {
4045 struct event_update_event *ev = &event->event_update;
4046 struct event_update_event_scale *ev_scale;
4047 struct event_update_event_cpus *ev_cpus;
4048 struct perf_evlist *evlist;
4049 struct perf_evsel *evsel;
4050 struct cpu_map *map;
4051
4052 if (!pevlist || *pevlist == NULL)
4053 return -EINVAL;
4054
4055 evlist = *pevlist;
4056
4057 evsel = perf_evlist__id2evsel(evlist, ev->id);
4058 if (evsel == NULL)
4059 return -EINVAL;
4060
4061 switch (ev->type) {
4062 case PERF_EVENT_UPDATE__UNIT:
4063 evsel->unit = strdup(ev->data);
4064 break;
4065 case PERF_EVENT_UPDATE__NAME:
4066 evsel->name = strdup(ev->data);
4067 break;
4068 case PERF_EVENT_UPDATE__SCALE:
4069 ev_scale = (struct event_update_event_scale *) ev->data;
4070 evsel->scale = ev_scale->scale;
4071 break;
4072 case PERF_EVENT_UPDATE__CPUS:
4073 ev_cpus = (struct event_update_event_cpus *) ev->data;
4074
4075 map = cpu_map__new_data(&ev_cpus->cpus);
4076 if (map)
4077 evsel->own_cpus = map;
4078 else
4079 pr_err("failed to get event_update cpus\n");
4080 default:
4081 break;
4082 }
4083
4084 return 0;
4085 }
4086
4087 int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd,
4088 struct perf_evlist *evlist,
4089 perf_event__handler_t process)
4090 {
4091 union perf_event ev;
4092 struct tracing_data *tdata;
4093 ssize_t size = 0, aligned_size = 0, padding;
4094 struct feat_fd ff;
4095 int err __maybe_unused = 0;
4096
4097 /*
4098 * We are going to store the size of the data followed
4099 * by the data contents. Since the fd descriptor is a pipe,
4100 * we cannot seek back to store the size of the data once
4101 * we know it. Instead we:
4102 *
4103 * - write the tracing data to the temp file
4104 * - get/write the data size to pipe
4105 * - write the tracing data from the temp file
4106 * to the pipe
4107 */
4108 tdata = tracing_data_get(&evlist->entries, fd, true);
4109 if (!tdata)
4110 return -1;
4111
4112 memset(&ev, 0, sizeof(ev));
4113
4114 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
4115 size = tdata->size;
4116 aligned_size = PERF_ALIGN(size, sizeof(u64));
4117 padding = aligned_size - size;
4118 ev.tracing_data.header.size = sizeof(ev.tracing_data);
4119 ev.tracing_data.size = aligned_size;
4120
4121 process(tool, &ev, NULL, NULL);
4122
4123 /*
4124 * The put function will copy all the tracing data
4125 * stored in temp file to the pipe.
4126 */
4127 tracing_data_put(tdata);
4128
4129 ff = (struct feat_fd){ .fd = fd };
4130 if (write_padded(&ff, NULL, 0, padding))
4131 return -1;
4132
4133 return aligned_size;
4134 }
4135
4136 int perf_event__process_tracing_data(struct perf_session *session,
4137 union perf_event *event)
4138 {
4139 ssize_t size_read, padding, size = event->tracing_data.size;
4140 int fd = perf_data__fd(session->data);
4141 off_t offset = lseek(fd, 0, SEEK_CUR);
4142 char buf[BUFSIZ];
4143
4144 /* setup for reading amidst mmap */
4145 lseek(fd, offset + sizeof(struct tracing_data_event),
4146 SEEK_SET);
4147
4148 size_read = trace_report(fd, &session->tevent,
4149 session->repipe);
4150 padding = PERF_ALIGN(size_read, sizeof(u64)) - size_read;
4151
4152 if (readn(fd, buf, padding) < 0) {
4153 pr_err("%s: reading input file", __func__);
4154 return -1;
4155 }
4156 if (session->repipe) {
4157 int retw = write(STDOUT_FILENO, buf, padding);
4158 if (retw <= 0 || retw != padding) {
4159 pr_err("%s: repiping tracing data padding", __func__);
4160 return -1;
4161 }
4162 }
4163
4164 if (size_read + padding != size) {
4165 pr_err("%s: tracing data size mismatch", __func__);
4166 return -1;
4167 }
4168
4169 perf_evlist__prepare_tracepoint_events(session->evlist,
4170 session->tevent.pevent);
4171
4172 return size_read + padding;
4173 }
4174
4175 int perf_event__synthesize_build_id(struct perf_tool *tool,
4176 struct dso *pos, u16 misc,
4177 perf_event__handler_t process,
4178 struct machine *machine)
4179 {
4180 union perf_event ev;
4181 size_t len;
4182 int err = 0;
4183
4184 if (!pos->hit)
4185 return err;
4186
4187 memset(&ev, 0, sizeof(ev));
4188
4189 len = pos->long_name_len + 1;
4190 len = PERF_ALIGN(len, NAME_ALIGN);
4191 memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
4192 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
4193 ev.build_id.header.misc = misc;
4194 ev.build_id.pid = machine->pid;
4195 ev.build_id.header.size = sizeof(ev.build_id) + len;
4196 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
4197
4198 err = process(tool, &ev, NULL, machine);
4199
4200 return err;
4201 }
4202
4203 int perf_event__process_build_id(struct perf_session *session,
4204 union perf_event *event)
4205 {
4206 __event_process_build_id(&event->build_id,
4207 event->build_id.filename,
4208 session);
4209 return 0;
4210 }
Linux with added FPC-III support