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md: use resync_max_sectors for reshape as well as resync.
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / tools / perf / util / header.c
blob4c7c2d73251f81af31f6394c394baa0d17b64043
1 #define _FILE_OFFSET_BITS 64
2
3 #include "util.h"
4 #include <sys/types.h>
5 #include <byteswap.h>
6 #include <unistd.h>
7 #include <stdio.h>
8 #include <stdlib.h>
9 #include <linux/list.h>
10 #include <linux/kernel.h>
11 #include <linux/bitops.h>
12 #include <sys/utsname.h>
13
14 #include "evlist.h"
15 #include "evsel.h"
16 #include "header.h"
17 #include "../perf.h"
18 #include "trace-event.h"
19 #include "session.h"
20 #include "symbol.h"
21 #include "debug.h"
22 #include "cpumap.h"
23
24 static bool no_buildid_cache = false;
25
26 static int event_count;
27 static struct perf_trace_event_type *events;
28
29 static u32 header_argc;
30 static const char **header_argv;
31
32 int perf_header__push_event(u64 id, const char *name)
33 {
34 if (strlen(name) > MAX_EVENT_NAME)
35 pr_warning("Event %s will be truncated\n", name);
36
37 if (!events) {
38 events = malloc(sizeof(struct perf_trace_event_type));
39 if (events == NULL)
40 return -ENOMEM;
41 } else {
42 struct perf_trace_event_type *nevents;
43
44 nevents = realloc(events, (event_count + 1) * sizeof(*events));
45 if (nevents == NULL)
46 return -ENOMEM;
47 events = nevents;
48 }
49 memset(&events[event_count], 0, sizeof(struct perf_trace_event_type));
50 events[event_count].event_id = id;
51 strncpy(events[event_count].name, name, MAX_EVENT_NAME - 1);
52 event_count++;
53 return 0;
54 }
55
56 char *perf_header__find_event(u64 id)
57 {
58 int i;
59 for (i = 0 ; i < event_count; i++) {
60 if (events[i].event_id == id)
61 return events[i].name;
62 }
63 return NULL;
64 }
65
66 /*
67 * magic2 = "PERFILE2"
68 * must be a numerical value to let the endianness
69 * determine the memory layout. That way we are able
70 * to detect endianness when reading the perf.data file
71 * back.
72 *
73 * we check for legacy (PERFFILE) format.
74 */
75 static const char *__perf_magic1 = "PERFFILE";
76 static const u64 __perf_magic2 = 0x32454c4946524550ULL;
77 static const u64 __perf_magic2_sw = 0x50455246494c4532ULL;
78
79 #define PERF_MAGIC __perf_magic2
80
81 struct perf_file_attr {
82 struct perf_event_attr attr;
83 struct perf_file_section ids;
84 };
85
86 void perf_header__set_feat(struct perf_header *header, int feat)
87 {
88 set_bit(feat, header->adds_features);
89 }
90
91 void perf_header__clear_feat(struct perf_header *header, int feat)
92 {
93 clear_bit(feat, header->adds_features);
94 }
95
96 bool perf_header__has_feat(const struct perf_header *header, int feat)
97 {
98 return test_bit(feat, header->adds_features);
99 }
100
101 static int do_write(int fd, const void *buf, size_t size)
102 {
103 while (size) {
104 int ret = write(fd, buf, size);
105
106 if (ret < 0)
107 return -errno;
108
109 size -= ret;
110 buf += ret;
111 }
112
113 return 0;
114 }
115
116 #define NAME_ALIGN 64
117
118 static int write_padded(int fd, const void *bf, size_t count,
119 size_t count_aligned)
120 {
121 static const char zero_buf[NAME_ALIGN];
122 int err = do_write(fd, bf, count);
123
124 if (!err)
125 err = do_write(fd, zero_buf, count_aligned - count);
126
127 return err;
128 }
129
130 static int do_write_string(int fd, const char *str)
131 {
132 u32 len, olen;
133 int ret;
134
135 olen = strlen(str) + 1;
136 len = ALIGN(olen, NAME_ALIGN);
137
138 /* write len, incl. \0 */
139 ret = do_write(fd, &len, sizeof(len));
140 if (ret < 0)
141 return ret;
142
143 return write_padded(fd, str, olen, len);
144 }
145
146 static char *do_read_string(int fd, struct perf_header *ph)
147 {
148 ssize_t sz, ret;
149 u32 len;
150 char *buf;
151
152 sz = read(fd, &len, sizeof(len));
153 if (sz < (ssize_t)sizeof(len))
154 return NULL;
155
156 if (ph->needs_swap)
157 len = bswap_32(len);
158
159 buf = malloc(len);
160 if (!buf)
161 return NULL;
162
163 ret = read(fd, buf, len);
164 if (ret == (ssize_t)len) {
165 /*
166 * strings are padded by zeroes
167 * thus the actual strlen of buf
168 * may be less than len
169 */
170 return buf;
171 }
172
173 free(buf);
174 return NULL;
175 }
176
177 int
178 perf_header__set_cmdline(int argc, const char **argv)
179 {
180 int i;
181
182 header_argc = (u32)argc;
183
184 /* do not include NULL termination */
185 header_argv = calloc(argc, sizeof(char *));
186 if (!header_argv)
187 return -ENOMEM;
188
189 /*
190 * must copy argv contents because it gets moved
191 * around during option parsing
192 */
193 for (i = 0; i < argc ; i++)
194 header_argv[i] = argv[i];
195
196 return 0;
197 }
198
199 #define dsos__for_each_with_build_id(pos, head) \
200 list_for_each_entry(pos, head, node) \
201 if (!pos->has_build_id) \
202 continue; \
203 else
204
205 static int __dsos__write_buildid_table(struct list_head *head, pid_t pid,
206 u16 misc, int fd)
207 {
208 struct dso *pos;
209
210 dsos__for_each_with_build_id(pos, head) {
211 int err;
212 struct build_id_event b;
213 size_t len;
214
215 if (!pos->hit)
216 continue;
217 len = pos->long_name_len + 1;
218 len = ALIGN(len, NAME_ALIGN);
219 memset(&b, 0, sizeof(b));
220 memcpy(&b.build_id, pos->build_id, sizeof(pos->build_id));
221 b.pid = pid;
222 b.header.misc = misc;
223 b.header.size = sizeof(b) + len;
224 err = do_write(fd, &b, sizeof(b));
225 if (err < 0)
226 return err;
227 err = write_padded(fd, pos->long_name,
228 pos->long_name_len + 1, len);
229 if (err < 0)
230 return err;
231 }
232
233 return 0;
234 }
235
236 static int machine__write_buildid_table(struct machine *machine, int fd)
237 {
238 int err;
239 u16 kmisc = PERF_RECORD_MISC_KERNEL,
240 umisc = PERF_RECORD_MISC_USER;
241
242 if (!machine__is_host(machine)) {
243 kmisc = PERF_RECORD_MISC_GUEST_KERNEL;
244 umisc = PERF_RECORD_MISC_GUEST_USER;
245 }
246
247 err = __dsos__write_buildid_table(&machine->kernel_dsos, machine->pid,
248 kmisc, fd);
249 if (err == 0)
250 err = __dsos__write_buildid_table(&machine->user_dsos,
251 machine->pid, umisc, fd);
252 return err;
253 }
254
255 static int dsos__write_buildid_table(struct perf_header *header, int fd)
256 {
257 struct perf_session *session = container_of(header,
258 struct perf_session, header);
259 struct rb_node *nd;
260 int err = machine__write_buildid_table(&session->host_machine, fd);
261
262 if (err)
263 return err;
264
265 for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
266 struct machine *pos = rb_entry(nd, struct machine, rb_node);
267 err = machine__write_buildid_table(pos, fd);
268 if (err)
269 break;
270 }
271 return err;
272 }
273
274 int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
275 const char *name, bool is_kallsyms)
276 {
277 const size_t size = PATH_MAX;
278 char *realname, *filename = zalloc(size),
279 *linkname = zalloc(size), *targetname;
280 int len, err = -1;
281
282 if (is_kallsyms) {
283 if (symbol_conf.kptr_restrict) {
284 pr_debug("Not caching a kptr_restrict'ed /proc/kallsyms\n");
285 return 0;
286 }
287 realname = (char *)name;
288 } else
289 realname = realpath(name, NULL);
290
291 if (realname == NULL || filename == NULL || linkname == NULL)
292 goto out_free;
293
294 len = scnprintf(filename, size, "%s%s%s",
295 debugdir, is_kallsyms ? "/" : "", realname);
296 if (mkdir_p(filename, 0755))
297 goto out_free;
298
299 snprintf(filename + len, sizeof(filename) - len, "/%s", sbuild_id);
300
301 if (access(filename, F_OK)) {
302 if (is_kallsyms) {
303 if (copyfile("/proc/kallsyms", filename))
304 goto out_free;
305 } else if (link(realname, filename) && copyfile(name, filename))
306 goto out_free;
307 }
308
309 len = scnprintf(linkname, size, "%s/.build-id/%.2s",
310 debugdir, sbuild_id);
311
312 if (access(linkname, X_OK) && mkdir_p(linkname, 0755))
313 goto out_free;
314
315 snprintf(linkname + len, size - len, "/%s", sbuild_id + 2);
316 targetname = filename + strlen(debugdir) - 5;
317 memcpy(targetname, "../..", 5);
318
319 if (symlink(targetname, linkname) == 0)
320 err = 0;
321 out_free:
322 if (!is_kallsyms)
323 free(realname);
324 free(filename);
325 free(linkname);
326 return err;
327 }
328
329 static int build_id_cache__add_b(const u8 *build_id, size_t build_id_size,
330 const char *name, const char *debugdir,
331 bool is_kallsyms)
332 {
333 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
334
335 build_id__sprintf(build_id, build_id_size, sbuild_id);
336
337 return build_id_cache__add_s(sbuild_id, debugdir, name, is_kallsyms);
338 }
339
340 int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir)
341 {
342 const size_t size = PATH_MAX;
343 char *filename = zalloc(size),
344 *linkname = zalloc(size);
345 int err = -1;
346
347 if (filename == NULL || linkname == NULL)
348 goto out_free;
349
350 snprintf(linkname, size, "%s/.build-id/%.2s/%s",
351 debugdir, sbuild_id, sbuild_id + 2);
352
353 if (access(linkname, F_OK))
354 goto out_free;
355
356 if (readlink(linkname, filename, size - 1) < 0)
357 goto out_free;
358
359 if (unlink(linkname))
360 goto out_free;
361
362 /*
363 * Since the link is relative, we must make it absolute:
364 */
365 snprintf(linkname, size, "%s/.build-id/%.2s/%s",
366 debugdir, sbuild_id, filename);
367
368 if (unlink(linkname))
369 goto out_free;
370
371 err = 0;
372 out_free:
373 free(filename);
374 free(linkname);
375 return err;
376 }
377
378 static int dso__cache_build_id(struct dso *dso, const char *debugdir)
379 {
380 bool is_kallsyms = dso->kernel && dso->long_name[0] != '/';
381
382 return build_id_cache__add_b(dso->build_id, sizeof(dso->build_id),
383 dso->long_name, debugdir, is_kallsyms);
384 }
385
386 static int __dsos__cache_build_ids(struct list_head *head, const char *debugdir)
387 {
388 struct dso *pos;
389 int err = 0;
390
391 dsos__for_each_with_build_id(pos, head)
392 if (dso__cache_build_id(pos, debugdir))
393 err = -1;
394
395 return err;
396 }
397
398 static int machine__cache_build_ids(struct machine *machine, const char *debugdir)
399 {
400 int ret = __dsos__cache_build_ids(&machine->kernel_dsos, debugdir);
401 ret |= __dsos__cache_build_ids(&machine->user_dsos, debugdir);
402 return ret;
403 }
404
405 static int perf_session__cache_build_ids(struct perf_session *session)
406 {
407 struct rb_node *nd;
408 int ret;
409 char debugdir[PATH_MAX];
410
411 snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir);
412
413 if (mkdir(debugdir, 0755) != 0 && errno != EEXIST)
414 return -1;
415
416 ret = machine__cache_build_ids(&session->host_machine, debugdir);
417
418 for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
419 struct machine *pos = rb_entry(nd, struct machine, rb_node);
420 ret |= machine__cache_build_ids(pos, debugdir);
421 }
422 return ret ? -1 : 0;
423 }
424
425 static bool machine__read_build_ids(struct machine *machine, bool with_hits)
426 {
427 bool ret = __dsos__read_build_ids(&machine->kernel_dsos, with_hits);
428 ret |= __dsos__read_build_ids(&machine->user_dsos, with_hits);
429 return ret;
430 }
431
432 static bool perf_session__read_build_ids(struct perf_session *session, bool with_hits)
433 {
434 struct rb_node *nd;
435 bool ret = machine__read_build_ids(&session->host_machine, with_hits);
436
437 for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
438 struct machine *pos = rb_entry(nd, struct machine, rb_node);
439 ret |= machine__read_build_ids(pos, with_hits);
440 }
441
442 return ret;
443 }
444
445 static int write_trace_info(int fd, struct perf_header *h __used,
446 struct perf_evlist *evlist)
447 {
448 return read_tracing_data(fd, &evlist->entries);
449 }
450
451
452 static int write_build_id(int fd, struct perf_header *h,
453 struct perf_evlist *evlist __used)
454 {
455 struct perf_session *session;
456 int err;
457
458 session = container_of(h, struct perf_session, header);
459
460 if (!perf_session__read_build_ids(session, true))
461 return -1;
462
463 err = dsos__write_buildid_table(h, fd);
464 if (err < 0) {
465 pr_debug("failed to write buildid table\n");
466 return err;
467 }
468 if (!no_buildid_cache)
469 perf_session__cache_build_ids(session);
470
471 return 0;
472 }
473
474 static int write_hostname(int fd, struct perf_header *h __used,
475 struct perf_evlist *evlist __used)
476 {
477 struct utsname uts;
478 int ret;
479
480 ret = uname(&uts);
481 if (ret < 0)
482 return -1;
483
484 return do_write_string(fd, uts.nodename);
485 }
486
487 static int write_osrelease(int fd, struct perf_header *h __used,
488 struct perf_evlist *evlist __used)
489 {
490 struct utsname uts;
491 int ret;
492
493 ret = uname(&uts);
494 if (ret < 0)
495 return -1;
496
497 return do_write_string(fd, uts.release);
498 }
499
500 static int write_arch(int fd, struct perf_header *h __used,
501 struct perf_evlist *evlist __used)
502 {
503 struct utsname uts;
504 int ret;
505
506 ret = uname(&uts);
507 if (ret < 0)
508 return -1;
509
510 return do_write_string(fd, uts.machine);
511 }
512
513 static int write_version(int fd, struct perf_header *h __used,
514 struct perf_evlist *evlist __used)
515 {
516 return do_write_string(fd, perf_version_string);
517 }
518
519 static int write_cpudesc(int fd, struct perf_header *h __used,
520 struct perf_evlist *evlist __used)
521 {
522 #ifndef CPUINFO_PROC
523 #define CPUINFO_PROC NULL
524 #endif
525 FILE *file;
526 char *buf = NULL;
527 char *s, *p;
528 const char *search = CPUINFO_PROC;
529 size_t len = 0;
530 int ret = -1;
531
532 if (!search)
533 return -1;
534
535 file = fopen("/proc/cpuinfo", "r");
536 if (!file)
537 return -1;
538
539 while (getline(&buf, &len, file) > 0) {
540 ret = strncmp(buf, search, strlen(search));
541 if (!ret)
542 break;
543 }
544
545 if (ret)
546 goto done;
547
548 s = buf;
549
550 p = strchr(buf, ':');
551 if (p && *(p+1) == ' ' && *(p+2))
552 s = p + 2;
553 p = strchr(s, '\n');
554 if (p)
555 *p = '\0';
556
557 /* squash extra space characters (branding string) */
558 p = s;
559 while (*p) {
560 if (isspace(*p)) {
561 char *r = p + 1;
562 char *q = r;
563 *p = ' ';
564 while (*q && isspace(*q))
565 q++;
566 if (q != (p+1))
567 while ((*r++ = *q++));
568 }
569 p++;
570 }
571 ret = do_write_string(fd, s);
572 done:
573 free(buf);
574 fclose(file);
575 return ret;
576 }
577
578 static int write_nrcpus(int fd, struct perf_header *h __used,
579 struct perf_evlist *evlist __used)
580 {
581 long nr;
582 u32 nrc, nra;
583 int ret;
584
585 nr = sysconf(_SC_NPROCESSORS_CONF);
586 if (nr < 0)
587 return -1;
588
589 nrc = (u32)(nr & UINT_MAX);
590
591 nr = sysconf(_SC_NPROCESSORS_ONLN);
592 if (nr < 0)
593 return -1;
594
595 nra = (u32)(nr & UINT_MAX);
596
597 ret = do_write(fd, &nrc, sizeof(nrc));
598 if (ret < 0)
599 return ret;
600
601 return do_write(fd, &nra, sizeof(nra));
602 }
603
604 static int write_event_desc(int fd, struct perf_header *h __used,
605 struct perf_evlist *evlist)
606 {
607 struct perf_evsel *attr;
608 u32 nre = 0, nri, sz;
609 int ret;
610
611 list_for_each_entry(attr, &evlist->entries, node)
612 nre++;
613
614 /*
615 * write number of events
616 */
617 ret = do_write(fd, &nre, sizeof(nre));
618 if (ret < 0)
619 return ret;
620
621 /*
622 * size of perf_event_attr struct
623 */
624 sz = (u32)sizeof(attr->attr);
625 ret = do_write(fd, &sz, sizeof(sz));
626 if (ret < 0)
627 return ret;
628
629 list_for_each_entry(attr, &evlist->entries, node) {
630
631 ret = do_write(fd, &attr->attr, sz);
632 if (ret < 0)
633 return ret;
634 /*
635 * write number of unique id per event
636 * there is one id per instance of an event
637 *
638 * copy into an nri to be independent of the
639 * type of ids,
640 */
641 nri = attr->ids;
642 ret = do_write(fd, &nri, sizeof(nri));
643 if (ret < 0)
644 return ret;
645
646 /*
647 * write event string as passed on cmdline
648 */
649 ret = do_write_string(fd, event_name(attr));
650 if (ret < 0)
651 return ret;
652 /*
653 * write unique ids for this event
654 */
655 ret = do_write(fd, attr->id, attr->ids * sizeof(u64));
656 if (ret < 0)
657 return ret;
658 }
659 return 0;
660 }
661
662 static int write_cmdline(int fd, struct perf_header *h __used,
663 struct perf_evlist *evlist __used)
664 {
665 char buf[MAXPATHLEN];
666 char proc[32];
667 u32 i, n;
668 int ret;
669
670 /*
671 * actual atual path to perf binary
672 */
673 sprintf(proc, "/proc/%d/exe", getpid());
674 ret = readlink(proc, buf, sizeof(buf));
675 if (ret <= 0)
676 return -1;
677
678 /* readlink() does not add null termination */
679 buf[ret] = '\0';
680
681 /* account for binary path */
682 n = header_argc + 1;
683
684 ret = do_write(fd, &n, sizeof(n));
685 if (ret < 0)
686 return ret;
687
688 ret = do_write_string(fd, buf);
689 if (ret < 0)
690 return ret;
691
692 for (i = 0 ; i < header_argc; i++) {
693 ret = do_write_string(fd, header_argv[i]);
694 if (ret < 0)
695 return ret;
696 }
697 return 0;
698 }
699
700 #define CORE_SIB_FMT \
701 "/sys/devices/system/cpu/cpu%d/topology/core_siblings_list"
702 #define THRD_SIB_FMT \
703 "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list"
704
705 struct cpu_topo {
706 u32 core_sib;
707 u32 thread_sib;
708 char **core_siblings;
709 char **thread_siblings;
710 };
711
712 static int build_cpu_topo(struct cpu_topo *tp, int cpu)
713 {
714 FILE *fp;
715 char filename[MAXPATHLEN];
716 char *buf = NULL, *p;
717 size_t len = 0;
718 u32 i = 0;
719 int ret = -1;
720
721 sprintf(filename, CORE_SIB_FMT, cpu);
722 fp = fopen(filename, "r");
723 if (!fp)
724 return -1;
725
726 if (getline(&buf, &len, fp) <= 0)
727 goto done;
728
729 fclose(fp);
730
731 p = strchr(buf, '\n');
732 if (p)
733 *p = '\0';
734
735 for (i = 0; i < tp->core_sib; i++) {
736 if (!strcmp(buf, tp->core_siblings[i]))
737 break;
738 }
739 if (i == tp->core_sib) {
740 tp->core_siblings[i] = buf;
741 tp->core_sib++;
742 buf = NULL;
743 len = 0;
744 }
745
746 sprintf(filename, THRD_SIB_FMT, cpu);
747 fp = fopen(filename, "r");
748 if (!fp)
749 goto done;
750
751 if (getline(&buf, &len, fp) <= 0)
752 goto done;
753
754 p = strchr(buf, '\n');
755 if (p)
756 *p = '\0';
757
758 for (i = 0; i < tp->thread_sib; i++) {
759 if (!strcmp(buf, tp->thread_siblings[i]))
760 break;
761 }
762 if (i == tp->thread_sib) {
763 tp->thread_siblings[i] = buf;
764 tp->thread_sib++;
765 buf = NULL;
766 }
767 ret = 0;
768 done:
769 if(fp)
770 fclose(fp);
771 free(buf);
772 return ret;
773 }
774
775 static void free_cpu_topo(struct cpu_topo *tp)
776 {
777 u32 i;
778
779 if (!tp)
780 return;
781
782 for (i = 0 ; i < tp->core_sib; i++)
783 free(tp->core_siblings[i]);
784
785 for (i = 0 ; i < tp->thread_sib; i++)
786 free(tp->thread_siblings[i]);
787
788 free(tp);
789 }
790
791 static struct cpu_topo *build_cpu_topology(void)
792 {
793 struct cpu_topo *tp;
794 void *addr;
795 u32 nr, i;
796 size_t sz;
797 long ncpus;
798 int ret = -1;
799
800 ncpus = sysconf(_SC_NPROCESSORS_CONF);
801 if (ncpus < 0)
802 return NULL;
803
804 nr = (u32)(ncpus & UINT_MAX);
805
806 sz = nr * sizeof(char *);
807
808 addr = calloc(1, sizeof(*tp) + 2 * sz);
809 if (!addr)
810 return NULL;
811
812 tp = addr;
813
814 addr += sizeof(*tp);
815 tp->core_siblings = addr;
816 addr += sz;
817 tp->thread_siblings = addr;
818
819 for (i = 0; i < nr; i++) {
820 ret = build_cpu_topo(tp, i);
821 if (ret < 0)
822 break;
823 }
824 if (ret) {
825 free_cpu_topo(tp);
826 tp = NULL;
827 }
828 return tp;
829 }
830
831 static int write_cpu_topology(int fd, struct perf_header *h __used,
832 struct perf_evlist *evlist __used)
833 {
834 struct cpu_topo *tp;
835 u32 i;
836 int ret;
837
838 tp = build_cpu_topology();
839 if (!tp)
840 return -1;
841
842 ret = do_write(fd, &tp->core_sib, sizeof(tp->core_sib));
843 if (ret < 0)
844 goto done;
845
846 for (i = 0; i < tp->core_sib; i++) {
847 ret = do_write_string(fd, tp->core_siblings[i]);
848 if (ret < 0)
849 goto done;
850 }
851 ret = do_write(fd, &tp->thread_sib, sizeof(tp->thread_sib));
852 if (ret < 0)
853 goto done;
854
855 for (i = 0; i < tp->thread_sib; i++) {
856 ret = do_write_string(fd, tp->thread_siblings[i]);
857 if (ret < 0)
858 break;
859 }
860 done:
861 free_cpu_topo(tp);
862 return ret;
863 }
864
865
866
867 static int write_total_mem(int fd, struct perf_header *h __used,
868 struct perf_evlist *evlist __used)
869 {
870 char *buf = NULL;
871 FILE *fp;
872 size_t len = 0;
873 int ret = -1, n;
874 uint64_t mem;
875
876 fp = fopen("/proc/meminfo", "r");
877 if (!fp)
878 return -1;
879
880 while (getline(&buf, &len, fp) > 0) {
881 ret = strncmp(buf, "MemTotal:", 9);
882 if (!ret)
883 break;
884 }
885 if (!ret) {
886 n = sscanf(buf, "%*s %"PRIu64, &mem);
887 if (n == 1)
888 ret = do_write(fd, &mem, sizeof(mem));
889 }
890 free(buf);
891 fclose(fp);
892 return ret;
893 }
894
895 static int write_topo_node(int fd, int node)
896 {
897 char str[MAXPATHLEN];
898 char field[32];
899 char *buf = NULL, *p;
900 size_t len = 0;
901 FILE *fp;
902 u64 mem_total, mem_free, mem;
903 int ret = -1;
904
905 sprintf(str, "/sys/devices/system/node/node%d/meminfo", node);
906 fp = fopen(str, "r");
907 if (!fp)
908 return -1;
909
910 while (getline(&buf, &len, fp) > 0) {
911 /* skip over invalid lines */
912 if (!strchr(buf, ':'))
913 continue;
914 if (sscanf(buf, "%*s %*d %s %"PRIu64, field, &mem) != 2)
915 goto done;
916 if (!strcmp(field, "MemTotal:"))
917 mem_total = mem;
918 if (!strcmp(field, "MemFree:"))
919 mem_free = mem;
920 }
921
922 fclose(fp);
923
924 ret = do_write(fd, &mem_total, sizeof(u64));
925 if (ret)
926 goto done;
927
928 ret = do_write(fd, &mem_free, sizeof(u64));
929 if (ret)
930 goto done;
931
932 ret = -1;
933 sprintf(str, "/sys/devices/system/node/node%d/cpulist", node);
934
935 fp = fopen(str, "r");
936 if (!fp)
937 goto done;
938
939 if (getline(&buf, &len, fp) <= 0)
940 goto done;
941
942 p = strchr(buf, '\n');
943 if (p)
944 *p = '\0';
945
946 ret = do_write_string(fd, buf);
947 done:
948 free(buf);
949 fclose(fp);
950 return ret;
951 }
952
953 static int write_numa_topology(int fd, struct perf_header *h __used,
954 struct perf_evlist *evlist __used)
955 {
956 char *buf = NULL;
957 size_t len = 0;
958 FILE *fp;
959 struct cpu_map *node_map = NULL;
960 char *c;
961 u32 nr, i, j;
962 int ret = -1;
963
964 fp = fopen("/sys/devices/system/node/online", "r");
965 if (!fp)
966 return -1;
967
968 if (getline(&buf, &len, fp) <= 0)
969 goto done;
970
971 c = strchr(buf, '\n');
972 if (c)
973 *c = '\0';
974
975 node_map = cpu_map__new(buf);
976 if (!node_map)
977 goto done;
978
979 nr = (u32)node_map->nr;
980
981 ret = do_write(fd, &nr, sizeof(nr));
982 if (ret < 0)
983 goto done;
984
985 for (i = 0; i < nr; i++) {
986 j = (u32)node_map->map[i];
987 ret = do_write(fd, &j, sizeof(j));
988 if (ret < 0)
989 break;
990
991 ret = write_topo_node(fd, i);
992 if (ret < 0)
993 break;
994 }
995 done:
996 free(buf);
997 fclose(fp);
998 free(node_map);
999 return ret;
1000 }
1001
1002 /*
1003 * default get_cpuid(): nothing gets recorded
1004 * actual implementation must be in arch/$(ARCH)/util/header.c
1005 */
1006 int __attribute__((weak)) get_cpuid(char *buffer __used, size_t sz __used)
1007 {
1008 return -1;
1009 }
1010
1011 static int write_cpuid(int fd, struct perf_header *h __used,
1012 struct perf_evlist *evlist __used)
1013 {
1014 char buffer[64];
1015 int ret;
1016
1017 ret = get_cpuid(buffer, sizeof(buffer));
1018 if (!ret)
1019 goto write_it;
1020
1021 return -1;
1022 write_it:
1023 return do_write_string(fd, buffer);
1024 }
1025
1026 static int write_branch_stack(int fd __used, struct perf_header *h __used,
1027 struct perf_evlist *evlist __used)
1028 {
1029 return 0;
1030 }
1031
1032 static void print_hostname(struct perf_header *ph, int fd, FILE *fp)
1033 {
1034 char *str = do_read_string(fd, ph);
1035 fprintf(fp, "# hostname : %s\n", str);
1036 free(str);
1037 }
1038
1039 static void print_osrelease(struct perf_header *ph, int fd, FILE *fp)
1040 {
1041 char *str = do_read_string(fd, ph);
1042 fprintf(fp, "# os release : %s\n", str);
1043 free(str);
1044 }
1045
1046 static void print_arch(struct perf_header *ph, int fd, FILE *fp)
1047 {
1048 char *str = do_read_string(fd, ph);
1049 fprintf(fp, "# arch : %s\n", str);
1050 free(str);
1051 }
1052
1053 static void print_cpudesc(struct perf_header *ph, int fd, FILE *fp)
1054 {
1055 char *str = do_read_string(fd, ph);
1056 fprintf(fp, "# cpudesc : %s\n", str);
1057 free(str);
1058 }
1059
1060 static void print_nrcpus(struct perf_header *ph, int fd, FILE *fp)
1061 {
1062 ssize_t ret;
1063 u32 nr;
1064
1065 ret = read(fd, &nr, sizeof(nr));
1066 if (ret != (ssize_t)sizeof(nr))
1067 nr = -1; /* interpreted as error */
1068
1069 if (ph->needs_swap)
1070 nr = bswap_32(nr);
1071
1072 fprintf(fp, "# nrcpus online : %u\n", nr);
1073
1074 ret = read(fd, &nr, sizeof(nr));
1075 if (ret != (ssize_t)sizeof(nr))
1076 nr = -1; /* interpreted as error */
1077
1078 if (ph->needs_swap)
1079 nr = bswap_32(nr);
1080
1081 fprintf(fp, "# nrcpus avail : %u\n", nr);
1082 }
1083
1084 static void print_version(struct perf_header *ph, int fd, FILE *fp)
1085 {
1086 char *str = do_read_string(fd, ph);
1087 fprintf(fp, "# perf version : %s\n", str);
1088 free(str);
1089 }
1090
1091 static void print_cmdline(struct perf_header *ph, int fd, FILE *fp)
1092 {
1093 ssize_t ret;
1094 char *str;
1095 u32 nr, i;
1096
1097 ret = read(fd, &nr, sizeof(nr));
1098 if (ret != (ssize_t)sizeof(nr))
1099 return;
1100
1101 if (ph->needs_swap)
1102 nr = bswap_32(nr);
1103
1104 fprintf(fp, "# cmdline : ");
1105
1106 for (i = 0; i < nr; i++) {
1107 str = do_read_string(fd, ph);
1108 fprintf(fp, "%s ", str);
1109 free(str);
1110 }
1111 fputc('\n', fp);
1112 }
1113
1114 static void print_cpu_topology(struct perf_header *ph, int fd, FILE *fp)
1115 {
1116 ssize_t ret;
1117 u32 nr, i;
1118 char *str;
1119
1120 ret = read(fd, &nr, sizeof(nr));
1121 if (ret != (ssize_t)sizeof(nr))
1122 return;
1123
1124 if (ph->needs_swap)
1125 nr = bswap_32(nr);
1126
1127 for (i = 0; i < nr; i++) {
1128 str = do_read_string(fd, ph);
1129 fprintf(fp, "# sibling cores : %s\n", str);
1130 free(str);
1131 }
1132
1133 ret = read(fd, &nr, sizeof(nr));
1134 if (ret != (ssize_t)sizeof(nr))
1135 return;
1136
1137 if (ph->needs_swap)
1138 nr = bswap_32(nr);
1139
1140 for (i = 0; i < nr; i++) {
1141 str = do_read_string(fd, ph);
1142 fprintf(fp, "# sibling threads : %s\n", str);
1143 free(str);
1144 }
1145 }
1146
1147 static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
1148 {
1149 struct perf_event_attr attr;
1150 uint64_t id;
1151 void *buf = NULL;
1152 char *str;
1153 u32 nre, sz, nr, i, j;
1154 ssize_t ret;
1155 size_t msz;
1156
1157 /* number of events */
1158 ret = read(fd, &nre, sizeof(nre));
1159 if (ret != (ssize_t)sizeof(nre))
1160 goto error;
1161
1162 if (ph->needs_swap)
1163 nre = bswap_32(nre);
1164
1165 ret = read(fd, &sz, sizeof(sz));
1166 if (ret != (ssize_t)sizeof(sz))
1167 goto error;
1168
1169 if (ph->needs_swap)
1170 sz = bswap_32(sz);
1171
1172 memset(&attr, 0, sizeof(attr));
1173
1174 /* buffer to hold on file attr struct */
1175 buf = malloc(sz);
1176 if (!buf)
1177 goto error;
1178
1179 msz = sizeof(attr);
1180 if (sz < msz)
1181 msz = sz;
1182
1183 for (i = 0 ; i < nre; i++) {
1184
1185 /*
1186 * must read entire on-file attr struct to
1187 * sync up with layout.
1188 */
1189 ret = read(fd, buf, sz);
1190 if (ret != (ssize_t)sz)
1191 goto error;
1192
1193 if (ph->needs_swap)
1194 perf_event__attr_swap(buf);
1195
1196 memcpy(&attr, buf, msz);
1197
1198 ret = read(fd, &nr, sizeof(nr));
1199 if (ret != (ssize_t)sizeof(nr))
1200 goto error;
1201
1202 if (ph->needs_swap)
1203 nr = bswap_32(nr);
1204
1205 str = do_read_string(fd, ph);
1206 fprintf(fp, "# event : name = %s, ", str);
1207 free(str);
1208
1209 fprintf(fp, "type = %d, config = 0x%"PRIx64
1210 ", config1 = 0x%"PRIx64", config2 = 0x%"PRIx64,
1211 attr.type,
1212 (u64)attr.config,
1213 (u64)attr.config1,
1214 (u64)attr.config2);
1215
1216 fprintf(fp, ", excl_usr = %d, excl_kern = %d",
1217 attr.exclude_user,
1218 attr.exclude_kernel);
1219
1220 if (nr)
1221 fprintf(fp, ", id = {");
1222
1223 for (j = 0 ; j < nr; j++) {
1224 ret = read(fd, &id, sizeof(id));
1225 if (ret != (ssize_t)sizeof(id))
1226 goto error;
1227
1228 if (ph->needs_swap)
1229 id = bswap_64(id);
1230
1231 if (j)
1232 fputc(',', fp);
1233
1234 fprintf(fp, " %"PRIu64, id);
1235 }
1236 if (nr && j == nr)
1237 fprintf(fp, " }");
1238 fputc('\n', fp);
1239 }
1240 free(buf);
1241 return;
1242 error:
1243 fprintf(fp, "# event desc: not available or unable to read\n");
1244 }
1245
1246 static void print_total_mem(struct perf_header *h __used, int fd, FILE *fp)
1247 {
1248 uint64_t mem;
1249 ssize_t ret;
1250
1251 ret = read(fd, &mem, sizeof(mem));
1252 if (ret != sizeof(mem))
1253 goto error;
1254
1255 if (h->needs_swap)
1256 mem = bswap_64(mem);
1257
1258 fprintf(fp, "# total memory : %"PRIu64" kB\n", mem);
1259 return;
1260 error:
1261 fprintf(fp, "# total memory : unknown\n");
1262 }
1263
1264 static void print_numa_topology(struct perf_header *h __used, int fd, FILE *fp)
1265 {
1266 ssize_t ret;
1267 u32 nr, c, i;
1268 char *str;
1269 uint64_t mem_total, mem_free;
1270
1271 /* nr nodes */
1272 ret = read(fd, &nr, sizeof(nr));
1273 if (ret != (ssize_t)sizeof(nr))
1274 goto error;
1275
1276 if (h->needs_swap)
1277 nr = bswap_32(nr);
1278
1279 for (i = 0; i < nr; i++) {
1280
1281 /* node number */
1282 ret = read(fd, &c, sizeof(c));
1283 if (ret != (ssize_t)sizeof(c))
1284 goto error;
1285
1286 if (h->needs_swap)
1287 c = bswap_32(c);
1288
1289 ret = read(fd, &mem_total, sizeof(u64));
1290 if (ret != sizeof(u64))
1291 goto error;
1292
1293 ret = read(fd, &mem_free, sizeof(u64));
1294 if (ret != sizeof(u64))
1295 goto error;
1296
1297 if (h->needs_swap) {
1298 mem_total = bswap_64(mem_total);
1299 mem_free = bswap_64(mem_free);
1300 }
1301
1302 fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB,"
1303 " free = %"PRIu64" kB\n",
1304 c,
1305 mem_total,
1306 mem_free);
1307
1308 str = do_read_string(fd, h);
1309 fprintf(fp, "# node%u cpu list : %s\n", c, str);
1310 free(str);
1311 }
1312 return;
1313 error:
1314 fprintf(fp, "# numa topology : not available\n");
1315 }
1316
1317 static void print_cpuid(struct perf_header *ph, int fd, FILE *fp)
1318 {
1319 char *str = do_read_string(fd, ph);
1320 fprintf(fp, "# cpuid : %s\n", str);
1321 free(str);
1322 }
1323
1324 static void print_branch_stack(struct perf_header *ph __used, int fd __used,
1325 FILE *fp)
1326 {
1327 fprintf(fp, "# contains samples with branch stack\n");
1328 }
1329
1330 static int __event_process_build_id(struct build_id_event *bev,
1331 char *filename,
1332 struct perf_session *session)
1333 {
1334 int err = -1;
1335 struct list_head *head;
1336 struct machine *machine;
1337 u16 misc;
1338 struct dso *dso;
1339 enum dso_kernel_type dso_type;
1340
1341 machine = perf_session__findnew_machine(session, bev->pid);
1342 if (!machine)
1343 goto out;
1344
1345 misc = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1346
1347 switch (misc) {
1348 case PERF_RECORD_MISC_KERNEL:
1349 dso_type = DSO_TYPE_KERNEL;
1350 head = &machine->kernel_dsos;
1351 break;
1352 case PERF_RECORD_MISC_GUEST_KERNEL:
1353 dso_type = DSO_TYPE_GUEST_KERNEL;
1354 head = &machine->kernel_dsos;
1355 break;
1356 case PERF_RECORD_MISC_USER:
1357 case PERF_RECORD_MISC_GUEST_USER:
1358 dso_type = DSO_TYPE_USER;
1359 head = &machine->user_dsos;
1360 break;
1361 default:
1362 goto out;
1363 }
1364
1365 dso = __dsos__findnew(head, filename);
1366 if (dso != NULL) {
1367 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
1368
1369 dso__set_build_id(dso, &bev->build_id);
1370
1371 if (filename[0] == '[')
1372 dso->kernel = dso_type;
1373
1374 build_id__sprintf(dso->build_id, sizeof(dso->build_id),
1375 sbuild_id);
1376 pr_debug("build id event received for %s: %s\n",
1377 dso->long_name, sbuild_id);
1378 }
1379
1380 err = 0;
1381 out:
1382 return err;
1383 }
1384
1385 static int perf_header__read_build_ids_abi_quirk(struct perf_header *header,
1386 int input, u64 offset, u64 size)
1387 {
1388 struct perf_session *session = container_of(header, struct perf_session, header);
1389 struct {
1390 struct perf_event_header header;
1391 u8 build_id[ALIGN(BUILD_ID_SIZE, sizeof(u64))];
1392 char filename[0];
1393 } old_bev;
1394 struct build_id_event bev;
1395 char filename[PATH_MAX];
1396 u64 limit = offset + size;
1397
1398 while (offset < limit) {
1399 ssize_t len;
1400
1401 if (read(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev))
1402 return -1;
1403
1404 if (header->needs_swap)
1405 perf_event_header__bswap(&old_bev.header);
1406
1407 len = old_bev.header.size - sizeof(old_bev);
1408 if (read(input, filename, len) != len)
1409 return -1;
1410
1411 bev.header = old_bev.header;
1412
1413 /*
1414 * As the pid is the missing value, we need to fill
1415 * it properly. The header.misc value give us nice hint.
1416 */
1417 bev.pid = HOST_KERNEL_ID;
1418 if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER ||
1419 bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL)
1420 bev.pid = DEFAULT_GUEST_KERNEL_ID;
1421
1422 memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id));
1423 __event_process_build_id(&bev, filename, session);
1424
1425 offset += bev.header.size;
1426 }
1427
1428 return 0;
1429 }
1430
1431 static int perf_header__read_build_ids(struct perf_header *header,
1432 int input, u64 offset, u64 size)
1433 {
1434 struct perf_session *session = container_of(header, struct perf_session, header);
1435 struct build_id_event bev;
1436 char filename[PATH_MAX];
1437 u64 limit = offset + size, orig_offset = offset;
1438 int err = -1;
1439
1440 while (offset < limit) {
1441 ssize_t len;
1442
1443 if (read(input, &bev, sizeof(bev)) != sizeof(bev))
1444 goto out;
1445
1446 if (header->needs_swap)
1447 perf_event_header__bswap(&bev.header);
1448
1449 len = bev.header.size - sizeof(bev);
1450 if (read(input, filename, len) != len)
1451 goto out;
1452 /*
1453 * The a1645ce1 changeset:
1454 *
1455 * "perf: 'perf kvm' tool for monitoring guest performance from host"
1456 *
1457 * Added a field to struct build_id_event that broke the file
1458 * format.
1459 *
1460 * Since the kernel build-id is the first entry, process the
1461 * table using the old format if the well known
1462 * '[kernel.kallsyms]' string for the kernel build-id has the
1463 * first 4 characters chopped off (where the pid_t sits).
1464 */
1465 if (memcmp(filename, "nel.kallsyms]", 13) == 0) {
1466 if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1)
1467 return -1;
1468 return perf_header__read_build_ids_abi_quirk(header, input, offset, size);
1469 }
1470
1471 __event_process_build_id(&bev, filename, session);
1472
1473 offset += bev.header.size;
1474 }
1475 err = 0;
1476 out:
1477 return err;
1478 }
1479
1480 static int process_trace_info(struct perf_file_section *section __unused,
1481 struct perf_header *ph __unused,
1482 int feat __unused, int fd)
1483 {
1484 trace_report(fd, false);
1485 return 0;
1486 }
1487
1488 static int process_build_id(struct perf_file_section *section,
1489 struct perf_header *ph,
1490 int feat __unused, int fd)
1491 {
1492 if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
1493 pr_debug("Failed to read buildids, continuing...\n");
1494 return 0;
1495 }
1496
1497 struct feature_ops {
1498 int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist);
1499 void (*print)(struct perf_header *h, int fd, FILE *fp);
1500 int (*process)(struct perf_file_section *section,
1501 struct perf_header *h, int feat, int fd);
1502 const char *name;
1503 bool full_only;
1504 };
1505
1506 #define FEAT_OPA(n, func) \
1507 [n] = { .name = #n, .write = write_##func, .print = print_##func }
1508 #define FEAT_OPP(n, func) \
1509 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
1510 .process = process_##func }
1511 #define FEAT_OPF(n, func) \
1512 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
1513 .full_only = true }
1514
1515 /* feature_ops not implemented: */
1516 #define print_trace_info NULL
1517 #define print_build_id NULL
1518
1519 static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
1520 FEAT_OPP(HEADER_TRACE_INFO, trace_info),
1521 FEAT_OPP(HEADER_BUILD_ID, build_id),
1522 FEAT_OPA(HEADER_HOSTNAME, hostname),
1523 FEAT_OPA(HEADER_OSRELEASE, osrelease),
1524 FEAT_OPA(HEADER_VERSION, version),
1525 FEAT_OPA(HEADER_ARCH, arch),
1526 FEAT_OPA(HEADER_NRCPUS, nrcpus),
1527 FEAT_OPA(HEADER_CPUDESC, cpudesc),
1528 FEAT_OPA(HEADER_CPUID, cpuid),
1529 FEAT_OPA(HEADER_TOTAL_MEM, total_mem),
1530 FEAT_OPA(HEADER_EVENT_DESC, event_desc),
1531 FEAT_OPA(HEADER_CMDLINE, cmdline),
1532 FEAT_OPF(HEADER_CPU_TOPOLOGY, cpu_topology),
1533 FEAT_OPF(HEADER_NUMA_TOPOLOGY, numa_topology),
1534 FEAT_OPA(HEADER_BRANCH_STACK, branch_stack),
1535 };
1536
1537 struct header_print_data {
1538 FILE *fp;
1539 bool full; /* extended list of headers */
1540 };
1541
1542 static int perf_file_section__fprintf_info(struct perf_file_section *section,
1543 struct perf_header *ph,
1544 int feat, int fd, void *data)
1545 {
1546 struct header_print_data *hd = data;
1547
1548 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
1549 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
1550 "%d, continuing...\n", section->offset, feat);
1551 return 0;
1552 }
1553 if (feat >= HEADER_LAST_FEATURE) {
1554 pr_warning("unknown feature %d\n", feat);
1555 return 0;
1556 }
1557 if (!feat_ops[feat].print)
1558 return 0;
1559
1560 if (!feat_ops[feat].full_only || hd->full)
1561 feat_ops[feat].print(ph, fd, hd->fp);
1562 else
1563 fprintf(hd->fp, "# %s info available, use -I to display\n",
1564 feat_ops[feat].name);
1565
1566 return 0;
1567 }
1568
1569 int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
1570 {
1571 struct header_print_data hd;
1572 struct perf_header *header = &session->header;
1573 int fd = session->fd;
1574 hd.fp = fp;
1575 hd.full = full;
1576
1577 perf_header__process_sections(header, fd, &hd,
1578 perf_file_section__fprintf_info);
1579 return 0;
1580 }
1581
1582 static int do_write_feat(int fd, struct perf_header *h, int type,
1583 struct perf_file_section **p,
1584 struct perf_evlist *evlist)
1585 {
1586 int err;
1587 int ret = 0;
1588
1589 if (perf_header__has_feat(h, type)) {
1590 if (!feat_ops[type].write)
1591 return -1;
1592
1593 (*p)->offset = lseek(fd, 0, SEEK_CUR);
1594
1595 err = feat_ops[type].write(fd, h, evlist);
1596 if (err < 0) {
1597 pr_debug("failed to write feature %d\n", type);
1598
1599 /* undo anything written */
1600 lseek(fd, (*p)->offset, SEEK_SET);
1601
1602 return -1;
1603 }
1604 (*p)->size = lseek(fd, 0, SEEK_CUR) - (*p)->offset;
1605 (*p)++;
1606 }
1607 return ret;
1608 }
1609
1610 static int perf_header__adds_write(struct perf_header *header,
1611 struct perf_evlist *evlist, int fd)
1612 {
1613 int nr_sections;
1614 struct perf_file_section *feat_sec, *p;
1615 int sec_size;
1616 u64 sec_start;
1617 int feat;
1618 int err;
1619
1620 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
1621 if (!nr_sections)
1622 return 0;
1623
1624 feat_sec = p = calloc(sizeof(*feat_sec), nr_sections);
1625 if (feat_sec == NULL)
1626 return -ENOMEM;
1627
1628 sec_size = sizeof(*feat_sec) * nr_sections;
1629
1630 sec_start = header->data_offset + header->data_size;
1631 lseek(fd, sec_start + sec_size, SEEK_SET);
1632
1633 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
1634 if (do_write_feat(fd, header, feat, &p, evlist))
1635 perf_header__clear_feat(header, feat);
1636 }
1637
1638 lseek(fd, sec_start, SEEK_SET);
1639 /*
1640 * may write more than needed due to dropped feature, but
1641 * this is okay, reader will skip the mising entries
1642 */
1643 err = do_write(fd, feat_sec, sec_size);
1644 if (err < 0)
1645 pr_debug("failed to write feature section\n");
1646 free(feat_sec);
1647 return err;
1648 }
1649
1650 int perf_header__write_pipe(int fd)
1651 {
1652 struct perf_pipe_file_header f_header;
1653 int err;
1654
1655 f_header = (struct perf_pipe_file_header){
1656 .magic = PERF_MAGIC,
1657 .size = sizeof(f_header),
1658 };
1659
1660 err = do_write(fd, &f_header, sizeof(f_header));
1661 if (err < 0) {
1662 pr_debug("failed to write perf pipe header\n");
1663 return err;
1664 }
1665
1666 return 0;
1667 }
1668
1669 int perf_session__write_header(struct perf_session *session,
1670 struct perf_evlist *evlist,
1671 int fd, bool at_exit)
1672 {
1673 struct perf_file_header f_header;
1674 struct perf_file_attr f_attr;
1675 struct perf_header *header = &session->header;
1676 struct perf_evsel *attr, *pair = NULL;
1677 int err;
1678
1679 lseek(fd, sizeof(f_header), SEEK_SET);
1680
1681 if (session->evlist != evlist)
1682 pair = list_entry(session->evlist->entries.next, struct perf_evsel, node);
1683
1684 list_for_each_entry(attr, &evlist->entries, node) {
1685 attr->id_offset = lseek(fd, 0, SEEK_CUR);
1686 err = do_write(fd, attr->id, attr->ids * sizeof(u64));
1687 if (err < 0) {
1688 out_err_write:
1689 pr_debug("failed to write perf header\n");
1690 return err;
1691 }
1692 if (session->evlist != evlist) {
1693 err = do_write(fd, pair->id, pair->ids * sizeof(u64));
1694 if (err < 0)
1695 goto out_err_write;
1696 attr->ids += pair->ids;
1697 pair = list_entry(pair->node.next, struct perf_evsel, node);
1698 }
1699 }
1700
1701 header->attr_offset = lseek(fd, 0, SEEK_CUR);
1702
1703 list_for_each_entry(attr, &evlist->entries, node) {
1704 f_attr = (struct perf_file_attr){
1705 .attr = attr->attr,
1706 .ids = {
1707 .offset = attr->id_offset,
1708 .size = attr->ids * sizeof(u64),
1709 }
1710 };
1711 err = do_write(fd, &f_attr, sizeof(f_attr));
1712 if (err < 0) {
1713 pr_debug("failed to write perf header attribute\n");
1714 return err;
1715 }
1716 }
1717
1718 header->event_offset = lseek(fd, 0, SEEK_CUR);
1719 header->event_size = event_count * sizeof(struct perf_trace_event_type);
1720 if (events) {
1721 err = do_write(fd, events, header->event_size);
1722 if (err < 0) {
1723 pr_debug("failed to write perf header events\n");
1724 return err;
1725 }
1726 }
1727
1728 header->data_offset = lseek(fd, 0, SEEK_CUR);
1729
1730 if (at_exit) {
1731 err = perf_header__adds_write(header, evlist, fd);
1732 if (err < 0)
1733 return err;
1734 }
1735
1736 f_header = (struct perf_file_header){
1737 .magic = PERF_MAGIC,
1738 .size = sizeof(f_header),
1739 .attr_size = sizeof(f_attr),
1740 .attrs = {
1741 .offset = header->attr_offset,
1742 .size = evlist->nr_entries * sizeof(f_attr),
1743 },
1744 .data = {
1745 .offset = header->data_offset,
1746 .size = header->data_size,
1747 },
1748 .event_types = {
1749 .offset = header->event_offset,
1750 .size = header->event_size,
1751 },
1752 };
1753
1754 memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features));
1755
1756 lseek(fd, 0, SEEK_SET);
1757 err = do_write(fd, &f_header, sizeof(f_header));
1758 if (err < 0) {
1759 pr_debug("failed to write perf header\n");
1760 return err;
1761 }
1762 lseek(fd, header->data_offset + header->data_size, SEEK_SET);
1763
1764 header->frozen = 1;
1765 return 0;
1766 }
1767
1768 static int perf_header__getbuffer64(struct perf_header *header,
1769 int fd, void *buf, size_t size)
1770 {
1771 if (readn(fd, buf, size) <= 0)
1772 return -1;
1773
1774 if (header->needs_swap)
1775 mem_bswap_64(buf, size);
1776
1777 return 0;
1778 }
1779
1780 int perf_header__process_sections(struct perf_header *header, int fd,
1781 void *data,
1782 int (*process)(struct perf_file_section *section,
1783 struct perf_header *ph,
1784 int feat, int fd, void *data))
1785 {
1786 struct perf_file_section *feat_sec, *sec;
1787 int nr_sections;
1788 int sec_size;
1789 int feat;
1790 int err;
1791
1792 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
1793 if (!nr_sections)
1794 return 0;
1795
1796 feat_sec = sec = calloc(sizeof(*feat_sec), nr_sections);
1797 if (!feat_sec)
1798 return -1;
1799
1800 sec_size = sizeof(*feat_sec) * nr_sections;
1801
1802 lseek(fd, header->data_offset + header->data_size, SEEK_SET);
1803
1804 err = perf_header__getbuffer64(header, fd, feat_sec, sec_size);
1805 if (err < 0)
1806 goto out_free;
1807
1808 for_each_set_bit(feat, header->adds_features, HEADER_LAST_FEATURE) {
1809 err = process(sec++, header, feat, fd, data);
1810 if (err < 0)
1811 goto out_free;
1812 }
1813 err = 0;
1814 out_free:
1815 free(feat_sec);
1816 return err;
1817 }
1818
1819 static const int attr_file_abi_sizes[] = {
1820 [0] = PERF_ATTR_SIZE_VER0,
1821 [1] = PERF_ATTR_SIZE_VER1,
1822 0,
1823 };
1824
1825 /*
1826 * In the legacy file format, the magic number is not used to encode endianness.
1827 * hdr_sz was used to encode endianness. But given that hdr_sz can vary based
1828 * on ABI revisions, we need to try all combinations for all endianness to
1829 * detect the endianness.
1830 */
1831 static int try_all_file_abis(uint64_t hdr_sz, struct perf_header *ph)
1832 {
1833 uint64_t ref_size, attr_size;
1834 int i;
1835
1836 for (i = 0 ; attr_file_abi_sizes[i]; i++) {
1837 ref_size = attr_file_abi_sizes[i]
1838 + sizeof(struct perf_file_section);
1839 if (hdr_sz != ref_size) {
1840 attr_size = bswap_64(hdr_sz);
1841 if (attr_size != ref_size)
1842 continue;
1843
1844 ph->needs_swap = true;
1845 }
1846 pr_debug("ABI%d perf.data file detected, need_swap=%d\n",
1847 i,
1848 ph->needs_swap);
1849 return 0;
1850 }
1851 /* could not determine endianness */
1852 return -1;
1853 }
1854
1855 #define PERF_PIPE_HDR_VER0 16
1856
1857 static const size_t attr_pipe_abi_sizes[] = {
1858 [0] = PERF_PIPE_HDR_VER0,
1859 0,
1860 };
1861
1862 /*
1863 * In the legacy pipe format, there is an implicit assumption that endiannesss
1864 * between host recording the samples, and host parsing the samples is the
1865 * same. This is not always the case given that the pipe output may always be
1866 * redirected into a file and analyzed on a different machine with possibly a
1867 * different endianness and perf_event ABI revsions in the perf tool itself.
1868 */
1869 static int try_all_pipe_abis(uint64_t hdr_sz, struct perf_header *ph)
1870 {
1871 u64 attr_size;
1872 int i;
1873
1874 for (i = 0 ; attr_pipe_abi_sizes[i]; i++) {
1875 if (hdr_sz != attr_pipe_abi_sizes[i]) {
1876 attr_size = bswap_64(hdr_sz);
1877 if (attr_size != hdr_sz)
1878 continue;
1879
1880 ph->needs_swap = true;
1881 }
1882 pr_debug("Pipe ABI%d perf.data file detected\n", i);
1883 return 0;
1884 }
1885 return -1;
1886 }
1887
1888 static int check_magic_endian(u64 magic, uint64_t hdr_sz,
1889 bool is_pipe, struct perf_header *ph)
1890 {
1891 int ret;
1892
1893 /* check for legacy format */
1894 ret = memcmp(&magic, __perf_magic1, sizeof(magic));
1895 if (ret == 0) {
1896 pr_debug("legacy perf.data format\n");
1897 if (is_pipe)
1898 return try_all_pipe_abis(hdr_sz, ph);
1899
1900 return try_all_file_abis(hdr_sz, ph);
1901 }
1902 /*
1903 * the new magic number serves two purposes:
1904 * - unique number to identify actual perf.data files
1905 * - encode endianness of file
1906 */
1907
1908 /* check magic number with one endianness */
1909 if (magic == __perf_magic2)
1910 return 0;
1911
1912 /* check magic number with opposite endianness */
1913 if (magic != __perf_magic2_sw)
1914 return -1;
1915
1916 ph->needs_swap = true;
1917
1918 return 0;
1919 }
1920
1921 int perf_file_header__read(struct perf_file_header *header,
1922 struct perf_header *ph, int fd)
1923 {
1924 int ret;
1925
1926 lseek(fd, 0, SEEK_SET);
1927
1928 ret = readn(fd, header, sizeof(*header));
1929 if (ret <= 0)
1930 return -1;
1931
1932 if (check_magic_endian(header->magic,
1933 header->attr_size, false, ph) < 0) {
1934 pr_debug("magic/endian check failed\n");
1935 return -1;
1936 }
1937
1938 if (ph->needs_swap) {
1939 mem_bswap_64(header, offsetof(struct perf_file_header,
1940 adds_features));
1941 }
1942
1943 if (header->size != sizeof(*header)) {
1944 /* Support the previous format */
1945 if (header->size == offsetof(typeof(*header), adds_features))
1946 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
1947 else
1948 return -1;
1949 } else if (ph->needs_swap) {
1950 unsigned int i;
1951 /*
1952 * feature bitmap is declared as an array of unsigned longs --
1953 * not good since its size can differ between the host that
1954 * generated the data file and the host analyzing the file.
1955 *
1956 * We need to handle endianness, but we don't know the size of
1957 * the unsigned long where the file was generated. Take a best
1958 * guess at determining it: try 64-bit swap first (ie., file
1959 * created on a 64-bit host), and check if the hostname feature
1960 * bit is set (this feature bit is forced on as of fbe96f2).
1961 * If the bit is not, undo the 64-bit swap and try a 32-bit
1962 * swap. If the hostname bit is still not set (e.g., older data
1963 * file), punt and fallback to the original behavior --
1964 * clearing all feature bits and setting buildid.
1965 */
1966 for (i = 0; i < BITS_TO_LONGS(HEADER_FEAT_BITS); ++i)
1967 header->adds_features[i] = bswap_64(header->adds_features[i]);
1968
1969 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
1970 for (i = 0; i < BITS_TO_LONGS(HEADER_FEAT_BITS); ++i) {
1971 header->adds_features[i] = bswap_64(header->adds_features[i]);
1972 header->adds_features[i] = bswap_32(header->adds_features[i]);
1973 }
1974 }
1975
1976 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
1977 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
1978 set_bit(HEADER_BUILD_ID, header->adds_features);
1979 }
1980 }
1981
1982 memcpy(&ph->adds_features, &header->adds_features,
1983 sizeof(ph->adds_features));
1984
1985 ph->event_offset = header->event_types.offset;
1986 ph->event_size = header->event_types.size;
1987 ph->data_offset = header->data.offset;
1988 ph->data_size = header->data.size;
1989 return 0;
1990 }
1991
1992 static int perf_file_section__process(struct perf_file_section *section,
1993 struct perf_header *ph,
1994 int feat, int fd, void *data __used)
1995 {
1996 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
1997 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
1998 "%d, continuing...\n", section->offset, feat);
1999 return 0;
2000 }
2001
2002 if (feat >= HEADER_LAST_FEATURE) {
2003 pr_debug("unknown feature %d, continuing...\n", feat);
2004 return 0;
2005 }
2006
2007 if (!feat_ops[feat].process)
2008 return 0;
2009
2010 return feat_ops[feat].process(section, ph, feat, fd);
2011 }
2012
2013 static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
2014 struct perf_header *ph, int fd,
2015 bool repipe)
2016 {
2017 int ret;
2018
2019 ret = readn(fd, header, sizeof(*header));
2020 if (ret <= 0)
2021 return -1;
2022
2023 if (check_magic_endian(header->magic, header->size, true, ph) < 0) {
2024 pr_debug("endian/magic failed\n");
2025 return -1;
2026 }
2027
2028 if (ph->needs_swap)
2029 header->size = bswap_64(header->size);
2030
2031 if (repipe && do_write(STDOUT_FILENO, header, sizeof(*header)) < 0)
2032 return -1;
2033
2034 return 0;
2035 }
2036
2037 static int perf_header__read_pipe(struct perf_session *session, int fd)
2038 {
2039 struct perf_header *header = &session->header;
2040 struct perf_pipe_file_header f_header;
2041
2042 if (perf_file_header__read_pipe(&f_header, header, fd,
2043 session->repipe) < 0) {
2044 pr_debug("incompatible file format\n");
2045 return -EINVAL;
2046 }
2047
2048 session->fd = fd;
2049
2050 return 0;
2051 }
2052
2053 static int read_attr(int fd, struct perf_header *ph,
2054 struct perf_file_attr *f_attr)
2055 {
2056 struct perf_event_attr *attr = &f_attr->attr;
2057 size_t sz, left;
2058 size_t our_sz = sizeof(f_attr->attr);
2059 int ret;
2060
2061 memset(f_attr, 0, sizeof(*f_attr));
2062
2063 /* read minimal guaranteed structure */
2064 ret = readn(fd, attr, PERF_ATTR_SIZE_VER0);
2065 if (ret <= 0) {
2066 pr_debug("cannot read %d bytes of header attr\n",
2067 PERF_ATTR_SIZE_VER0);
2068 return -1;
2069 }
2070
2071 /* on file perf_event_attr size */
2072 sz = attr->size;
2073
2074 if (ph->needs_swap)
2075 sz = bswap_32(sz);
2076
2077 if (sz == 0) {
2078 /* assume ABI0 */
2079 sz = PERF_ATTR_SIZE_VER0;
2080 } else if (sz > our_sz) {
2081 pr_debug("file uses a more recent and unsupported ABI"
2082 " (%zu bytes extra)\n", sz - our_sz);
2083 return -1;
2084 }
2085 /* what we have not yet read and that we know about */
2086 left = sz - PERF_ATTR_SIZE_VER0;
2087 if (left) {
2088 void *ptr = attr;
2089 ptr += PERF_ATTR_SIZE_VER0;
2090
2091 ret = readn(fd, ptr, left);
2092 }
2093 /* read perf_file_section, ids are read in caller */
2094 ret = readn(fd, &f_attr->ids, sizeof(f_attr->ids));
2095
2096 return ret <= 0 ? -1 : 0;
2097 }
2098
2099 int perf_session__read_header(struct perf_session *session, int fd)
2100 {
2101 struct perf_header *header = &session->header;
2102 struct perf_file_header f_header;
2103 struct perf_file_attr f_attr;
2104 u64 f_id;
2105 int nr_attrs, nr_ids, i, j;
2106
2107 session->evlist = perf_evlist__new(NULL, NULL);
2108 if (session->evlist == NULL)
2109 return -ENOMEM;
2110
2111 if (session->fd_pipe)
2112 return perf_header__read_pipe(session, fd);
2113
2114 if (perf_file_header__read(&f_header, header, fd) < 0)
2115 return -EINVAL;
2116
2117 nr_attrs = f_header.attrs.size / f_header.attr_size;
2118 lseek(fd, f_header.attrs.offset, SEEK_SET);
2119
2120 for (i = 0; i < nr_attrs; i++) {
2121 struct perf_evsel *evsel;
2122 off_t tmp;
2123
2124 if (read_attr(fd, header, &f_attr) < 0)
2125 goto out_errno;
2126
2127 if (header->needs_swap)
2128 perf_event__attr_swap(&f_attr.attr);
2129
2130 tmp = lseek(fd, 0, SEEK_CUR);
2131 evsel = perf_evsel__new(&f_attr.attr, i);
2132
2133 if (evsel == NULL)
2134 goto out_delete_evlist;
2135 /*
2136 * Do it before so that if perf_evsel__alloc_id fails, this
2137 * entry gets purged too at perf_evlist__delete().
2138 */
2139 perf_evlist__add(session->evlist, evsel);
2140
2141 nr_ids = f_attr.ids.size / sizeof(u64);
2142 /*
2143 * We don't have the cpu and thread maps on the header, so
2144 * for allocating the perf_sample_id table we fake 1 cpu and
2145 * hattr->ids threads.
2146 */
2147 if (perf_evsel__alloc_id(evsel, 1, nr_ids))
2148 goto out_delete_evlist;
2149
2150 lseek(fd, f_attr.ids.offset, SEEK_SET);
2151
2152 for (j = 0; j < nr_ids; j++) {
2153 if (perf_header__getbuffer64(header, fd, &f_id, sizeof(f_id)))
2154 goto out_errno;
2155
2156 perf_evlist__id_add(session->evlist, evsel, 0, j, f_id);
2157 }
2158
2159 lseek(fd, tmp, SEEK_SET);
2160 }
2161
2162 symbol_conf.nr_events = nr_attrs;
2163
2164 if (f_header.event_types.size) {
2165 lseek(fd, f_header.event_types.offset, SEEK_SET);
2166 events = malloc(f_header.event_types.size);
2167 if (events == NULL)
2168 return -ENOMEM;
2169 if (perf_header__getbuffer64(header, fd, events,
2170 f_header.event_types.size))
2171 goto out_errno;
2172 event_count = f_header.event_types.size / sizeof(struct perf_trace_event_type);
2173 }
2174
2175 perf_header__process_sections(header, fd, NULL,
2176 perf_file_section__process);
2177
2178 lseek(fd, header->data_offset, SEEK_SET);
2179
2180 header->frozen = 1;
2181 return 0;
2182 out_errno:
2183 return -errno;
2184
2185 out_delete_evlist:
2186 perf_evlist__delete(session->evlist);
2187 session->evlist = NULL;
2188 return -ENOMEM;
2189 }
2190
2191 int perf_event__synthesize_attr(struct perf_tool *tool,
2192 struct perf_event_attr *attr, u16 ids, u64 *id,
2193 perf_event__handler_t process)
2194 {
2195 union perf_event *ev;
2196 size_t size;
2197 int err;
2198
2199 size = sizeof(struct perf_event_attr);
2200 size = ALIGN(size, sizeof(u64));
2201 size += sizeof(struct perf_event_header);
2202 size += ids * sizeof(u64);
2203
2204 ev = malloc(size);
2205
2206 if (ev == NULL)
2207 return -ENOMEM;
2208
2209 ev->attr.attr = *attr;
2210 memcpy(ev->attr.id, id, ids * sizeof(u64));
2211
2212 ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
2213 ev->attr.header.size = size;
2214
2215 err = process(tool, ev, NULL, NULL);
2216
2217 free(ev);
2218
2219 return err;
2220 }
2221
2222 int perf_event__synthesize_attrs(struct perf_tool *tool,
2223 struct perf_session *session,
2224 perf_event__handler_t process)
2225 {
2226 struct perf_evsel *attr;
2227 int err = 0;
2228
2229 list_for_each_entry(attr, &session->evlist->entries, node) {
2230 err = perf_event__synthesize_attr(tool, &attr->attr, attr->ids,
2231 attr->id, process);
2232 if (err) {
2233 pr_debug("failed to create perf header attribute\n");
2234 return err;
2235 }
2236 }
2237
2238 return err;
2239 }
2240
2241 int perf_event__process_attr(union perf_event *event,
2242 struct perf_evlist **pevlist)
2243 {
2244 unsigned int i, ids, n_ids;
2245 struct perf_evsel *evsel;
2246 struct perf_evlist *evlist = *pevlist;
2247
2248 if (evlist == NULL) {
2249 *pevlist = evlist = perf_evlist__new(NULL, NULL);
2250 if (evlist == NULL)
2251 return -ENOMEM;
2252 }
2253
2254 evsel = perf_evsel__new(&event->attr.attr, evlist->nr_entries);
2255 if (evsel == NULL)
2256 return -ENOMEM;
2257
2258 perf_evlist__add(evlist, evsel);
2259
2260 ids = event->header.size;
2261 ids -= (void *)&event->attr.id - (void *)event;
2262 n_ids = ids / sizeof(u64);
2263 /*
2264 * We don't have the cpu and thread maps on the header, so
2265 * for allocating the perf_sample_id table we fake 1 cpu and
2266 * hattr->ids threads.
2267 */
2268 if (perf_evsel__alloc_id(evsel, 1, n_ids))
2269 return -ENOMEM;
2270
2271 for (i = 0; i < n_ids; i++) {
2272 perf_evlist__id_add(evlist, evsel, 0, i, event->attr.id[i]);
2273 }
2274
2275 return 0;
2276 }
2277
2278 int perf_event__synthesize_event_type(struct perf_tool *tool,
2279 u64 event_id, char *name,
2280 perf_event__handler_t process,
2281 struct machine *machine)
2282 {
2283 union perf_event ev;
2284 size_t size = 0;
2285 int err = 0;
2286
2287 memset(&ev, 0, sizeof(ev));
2288
2289 ev.event_type.event_type.event_id = event_id;
2290 memset(ev.event_type.event_type.name, 0, MAX_EVENT_NAME);
2291 strncpy(ev.event_type.event_type.name, name, MAX_EVENT_NAME - 1);
2292
2293 ev.event_type.header.type = PERF_RECORD_HEADER_EVENT_TYPE;
2294 size = strlen(ev.event_type.event_type.name);
2295 size = ALIGN(size, sizeof(u64));
2296 ev.event_type.header.size = sizeof(ev.event_type) -
2297 (sizeof(ev.event_type.event_type.name) - size);
2298
2299 err = process(tool, &ev, NULL, machine);
2300
2301 return err;
2302 }
2303
2304 int perf_event__synthesize_event_types(struct perf_tool *tool,
2305 perf_event__handler_t process,
2306 struct machine *machine)
2307 {
2308 struct perf_trace_event_type *type;
2309 int i, err = 0;
2310
2311 for (i = 0; i < event_count; i++) {
2312 type = &events[i];
2313
2314 err = perf_event__synthesize_event_type(tool, type->event_id,
2315 type->name, process,
2316 machine);
2317 if (err) {
2318 pr_debug("failed to create perf header event type\n");
2319 return err;
2320 }
2321 }
2322
2323 return err;
2324 }
2325
2326 int perf_event__process_event_type(struct perf_tool *tool __unused,
2327 union perf_event *event)
2328 {
2329 if (perf_header__push_event(event->event_type.event_type.event_id,
2330 event->event_type.event_type.name) < 0)
2331 return -ENOMEM;
2332
2333 return 0;
2334 }
2335
2336 int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd,
2337 struct perf_evlist *evlist,
2338 perf_event__handler_t process)
2339 {
2340 union perf_event ev;
2341 struct tracing_data *tdata;
2342 ssize_t size = 0, aligned_size = 0, padding;
2343 int err __used = 0;
2344
2345 /*
2346 * We are going to store the size of the data followed
2347 * by the data contents. Since the fd descriptor is a pipe,
2348 * we cannot seek back to store the size of the data once
2349 * we know it. Instead we:
2350 *
2351 * - write the tracing data to the temp file
2352 * - get/write the data size to pipe
2353 * - write the tracing data from the temp file
2354 * to the pipe
2355 */
2356 tdata = tracing_data_get(&evlist->entries, fd, true);
2357 if (!tdata)
2358 return -1;
2359
2360 memset(&ev, 0, sizeof(ev));
2361
2362 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
2363 size = tdata->size;
2364 aligned_size = ALIGN(size, sizeof(u64));
2365 padding = aligned_size - size;
2366 ev.tracing_data.header.size = sizeof(ev.tracing_data);
2367 ev.tracing_data.size = aligned_size;
2368
2369 process(tool, &ev, NULL, NULL);
2370
2371 /*
2372 * The put function will copy all the tracing data
2373 * stored in temp file to the pipe.
2374 */
2375 tracing_data_put(tdata);
2376
2377 write_padded(fd, NULL, 0, padding);
2378
2379 return aligned_size;
2380 }
2381
2382 int perf_event__process_tracing_data(union perf_event *event,
2383 struct perf_session *session)
2384 {
2385 ssize_t size_read, padding, size = event->tracing_data.size;
2386 off_t offset = lseek(session->fd, 0, SEEK_CUR);
2387 char buf[BUFSIZ];
2388
2389 /* setup for reading amidst mmap */
2390 lseek(session->fd, offset + sizeof(struct tracing_data_event),
2391 SEEK_SET);
2392
2393 size_read = trace_report(session->fd, session->repipe);
2394
2395 padding = ALIGN(size_read, sizeof(u64)) - size_read;
2396
2397 if (read(session->fd, buf, padding) < 0)
2398 die("reading input file");
2399 if (session->repipe) {
2400 int retw = write(STDOUT_FILENO, buf, padding);
2401 if (retw <= 0 || retw != padding)
2402 die("repiping tracing data padding");
2403 }
2404
2405 if (size_read + padding != size)
2406 die("tracing data size mismatch");
2407
2408 return size_read + padding;
2409 }
2410
2411 int perf_event__synthesize_build_id(struct perf_tool *tool,
2412 struct dso *pos, u16 misc,
2413 perf_event__handler_t process,
2414 struct machine *machine)
2415 {
2416 union perf_event ev;
2417 size_t len;
2418 int err = 0;
2419
2420 if (!pos->hit)
2421 return err;
2422
2423 memset(&ev, 0, sizeof(ev));
2424
2425 len = pos->long_name_len + 1;
2426 len = ALIGN(len, NAME_ALIGN);
2427 memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
2428 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
2429 ev.build_id.header.misc = misc;
2430 ev.build_id.pid = machine->pid;
2431 ev.build_id.header.size = sizeof(ev.build_id) + len;
2432 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
2433
2434 err = process(tool, &ev, NULL, machine);
2435
2436 return err;
2437 }
2438
2439 int perf_event__process_build_id(struct perf_tool *tool __used,
2440 union perf_event *event,
2441 struct perf_session *session)
2442 {
2443 __event_process_build_id(&event->build_id,
2444 event->build_id.filename,
2445 session);
2446 return 0;
2447 }
2448
2449 void disable_buildid_cache(void)
2450 {
2451 no_buildid_cache = true;
2452 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree