1 #define _FILE_OFFSET_BITS 64
8 #include <linux/list.h>
9 #include <linux/kernel.h>
16 #include "trace-event.h"
21 static bool no_buildid_cache = false;
23 static int event_count;
24 static struct perf_trace_event_type *events;
26 int perf_header__push_event(u64 id, const char *name)
28 if (strlen(name) > MAX_EVENT_NAME)
29 pr_warning("Event %s will be truncated\n", name);
32 events = malloc(sizeof(struct perf_trace_event_type));
36 struct perf_trace_event_type *nevents;
38 nevents = realloc(events, (event_count + 1) * sizeof(*events));
43 memset(&events[event_count], 0, sizeof(struct perf_trace_event_type));
44 events[event_count].event_id = id;
45 strncpy(events[event_count].name, name, MAX_EVENT_NAME - 1);
50 char *perf_header__find_event(u64 id)
53 for (i = 0 ; i < event_count; i++) {
54 if (events[i].event_id == id)
55 return events[i].name;
60 static const char *__perf_magic = "PERFFILE";
62 #define PERF_MAGIC (*(u64 *)__perf_magic)
64 struct perf_file_attr {
65 struct perf_event_attr attr;
66 struct perf_file_section ids;
69 void perf_header__set_feat(struct perf_header *header, int feat)
71 set_bit(feat, header->adds_features);
74 void perf_header__clear_feat(struct perf_header *header, int feat)
76 clear_bit(feat, header->adds_features);
79 bool perf_header__has_feat(const struct perf_header *header, int feat)
81 return test_bit(feat, header->adds_features);
84 static int do_write(int fd, const void *buf, size_t size)
87 int ret = write(fd, buf, size);
101 static int write_padded(int fd, const void *bf, size_t count,
102 size_t count_aligned)
104 static const char zero_buf[NAME_ALIGN];
105 int err = do_write(fd, bf, count);
108 err = do_write(fd, zero_buf, count_aligned - count);
113 #define dsos__for_each_with_build_id(pos, head) \
114 list_for_each_entry(pos, head, node) \
115 if (!pos->has_build_id) \
119 static int __dsos__write_buildid_table(struct list_head *head, pid_t pid,
124 dsos__for_each_with_build_id(pos, head) {
126 struct build_id_event b;
131 len = pos->long_name_len + 1;
132 len = ALIGN(len, NAME_ALIGN);
133 memset(&b, 0, sizeof(b));
134 memcpy(&b.build_id, pos->build_id, sizeof(pos->build_id));
136 b.header.misc = misc;
137 b.header.size = sizeof(b) + len;
138 err = do_write(fd, &b, sizeof(b));
141 err = write_padded(fd, pos->long_name,
142 pos->long_name_len + 1, len);
150 static int machine__write_buildid_table(struct machine *machine, int fd)
153 u16 kmisc = PERF_RECORD_MISC_KERNEL,
154 umisc = PERF_RECORD_MISC_USER;
156 if (!machine__is_host(machine)) {
157 kmisc = PERF_RECORD_MISC_GUEST_KERNEL;
158 umisc = PERF_RECORD_MISC_GUEST_USER;
161 err = __dsos__write_buildid_table(&machine->kernel_dsos, machine->pid,
164 err = __dsos__write_buildid_table(&machine->user_dsos,
165 machine->pid, umisc, fd);
169 static int dsos__write_buildid_table(struct perf_header *header, int fd)
171 struct perf_session *session = container_of(header,
172 struct perf_session, header);
174 int err = machine__write_buildid_table(&session->host_machine, fd);
179 for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
180 struct machine *pos = rb_entry(nd, struct machine, rb_node);
181 err = machine__write_buildid_table(pos, fd);
188 int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
189 const char *name, bool is_kallsyms)
191 const size_t size = PATH_MAX;
192 char *realname, *filename = malloc(size),
193 *linkname = malloc(size), *targetname;
197 if (symbol_conf.kptr_restrict) {
198 pr_debug("Not caching a kptr_restrict'ed /proc/kallsyms\n");
201 realname = (char *)name;
203 realname = realpath(name, NULL);
205 if (realname == NULL || filename == NULL || linkname == NULL)
208 len = snprintf(filename, size, "%s%s%s",
209 debugdir, is_kallsyms ? "/" : "", realname);
210 if (mkdir_p(filename, 0755))
213 snprintf(filename + len, sizeof(filename) - len, "/%s", sbuild_id);
215 if (access(filename, F_OK)) {
217 if (copyfile("/proc/kallsyms", filename))
219 } else if (link(realname, filename) && copyfile(name, filename))
223 len = snprintf(linkname, size, "%s/.build-id/%.2s",
224 debugdir, sbuild_id);
226 if (access(linkname, X_OK) && mkdir_p(linkname, 0755))
229 snprintf(linkname + len, size - len, "/%s", sbuild_id + 2);
230 targetname = filename + strlen(debugdir) - 5;
231 memcpy(targetname, "../..", 5);
233 if (symlink(targetname, linkname) == 0)
243 static int build_id_cache__add_b(const u8 *build_id, size_t build_id_size,
244 const char *name, const char *debugdir,
247 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
249 build_id__sprintf(build_id, build_id_size, sbuild_id);
251 return build_id_cache__add_s(sbuild_id, debugdir, name, is_kallsyms);
254 int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir)
256 const size_t size = PATH_MAX;
257 char *filename = malloc(size),
258 *linkname = malloc(size);
261 if (filename == NULL || linkname == NULL)
264 snprintf(linkname, size, "%s/.build-id/%.2s/%s",
265 debugdir, sbuild_id, sbuild_id + 2);
267 if (access(linkname, F_OK))
270 if (readlink(linkname, filename, size) < 0)
273 if (unlink(linkname))
277 * Since the link is relative, we must make it absolute:
279 snprintf(linkname, size, "%s/.build-id/%.2s/%s",
280 debugdir, sbuild_id, filename);
282 if (unlink(linkname))
292 static int dso__cache_build_id(struct dso *dso, const char *debugdir)
294 bool is_kallsyms = dso->kernel && dso->long_name[0] != '/';
296 return build_id_cache__add_b(dso->build_id, sizeof(dso->build_id),
297 dso->long_name, debugdir, is_kallsyms);
300 static int __dsos__cache_build_ids(struct list_head *head, const char *debugdir)
305 dsos__for_each_with_build_id(pos, head)
306 if (dso__cache_build_id(pos, debugdir))
312 static int machine__cache_build_ids(struct machine *machine, const char *debugdir)
314 int ret = __dsos__cache_build_ids(&machine->kernel_dsos, debugdir);
315 ret |= __dsos__cache_build_ids(&machine->user_dsos, debugdir);
319 static int perf_session__cache_build_ids(struct perf_session *session)
323 char debugdir[PATH_MAX];
325 snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir);
327 if (mkdir(debugdir, 0755) != 0 && errno != EEXIST)
330 ret = machine__cache_build_ids(&session->host_machine, debugdir);
332 for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
333 struct machine *pos = rb_entry(nd, struct machine, rb_node);
334 ret |= machine__cache_build_ids(pos, debugdir);
339 static bool machine__read_build_ids(struct machine *machine, bool with_hits)
341 bool ret = __dsos__read_build_ids(&machine->kernel_dsos, with_hits);
342 ret |= __dsos__read_build_ids(&machine->user_dsos, with_hits);
346 static bool perf_session__read_build_ids(struct perf_session *session, bool with_hits)
349 bool ret = machine__read_build_ids(&session->host_machine, with_hits);
351 for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
352 struct machine *pos = rb_entry(nd, struct machine, rb_node);
353 ret |= machine__read_build_ids(pos, with_hits);
359 static int perf_header__adds_write(struct perf_header *header,
360 struct perf_evlist *evlist, int fd)
363 struct perf_session *session;
364 struct perf_file_section *feat_sec;
369 session = container_of(header, struct perf_session, header);
371 if (perf_header__has_feat(header, HEADER_BUILD_ID &&
372 !perf_session__read_build_ids(session, true)))
373 perf_header__clear_feat(header, HEADER_BUILD_ID);
375 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
379 feat_sec = calloc(sizeof(*feat_sec), nr_sections);
380 if (feat_sec == NULL)
383 sec_size = sizeof(*feat_sec) * nr_sections;
385 sec_start = header->data_offset + header->data_size;
386 lseek(fd, sec_start + sec_size, SEEK_SET);
388 if (perf_header__has_feat(header, HEADER_TRACE_INFO)) {
389 struct perf_file_section *trace_sec;
391 trace_sec = &feat_sec[idx++];
393 /* Write trace info */
394 trace_sec->offset = lseek(fd, 0, SEEK_CUR);
395 read_tracing_data(fd, &evlist->entries);
396 trace_sec->size = lseek(fd, 0, SEEK_CUR) - trace_sec->offset;
399 if (perf_header__has_feat(header, HEADER_BUILD_ID)) {
400 struct perf_file_section *buildid_sec;
402 buildid_sec = &feat_sec[idx++];
404 /* Write build-ids */
405 buildid_sec->offset = lseek(fd, 0, SEEK_CUR);
406 err = dsos__write_buildid_table(header, fd);
408 pr_debug("failed to write buildid table\n");
411 buildid_sec->size = lseek(fd, 0, SEEK_CUR) -
413 if (!no_buildid_cache)
414 perf_session__cache_build_ids(session);
417 lseek(fd, sec_start, SEEK_SET);
418 err = do_write(fd, feat_sec, sec_size);
420 pr_debug("failed to write feature section\n");
426 int perf_header__write_pipe(int fd)
428 struct perf_pipe_file_header f_header;
431 f_header = (struct perf_pipe_file_header){
433 .size = sizeof(f_header),
436 err = do_write(fd, &f_header, sizeof(f_header));
438 pr_debug("failed to write perf pipe header\n");
445 int perf_session__write_header(struct perf_session *session,
446 struct perf_evlist *evlist,
447 int fd, bool at_exit)
449 struct perf_file_header f_header;
450 struct perf_file_attr f_attr;
451 struct perf_header *header = &session->header;
452 struct perf_evsel *attr, *pair = NULL;
455 lseek(fd, sizeof(f_header), SEEK_SET);
457 if (session->evlist != evlist)
458 pair = list_entry(session->evlist->entries.next, struct perf_evsel, node);
460 list_for_each_entry(attr, &evlist->entries, node) {
461 attr->id_offset = lseek(fd, 0, SEEK_CUR);
462 err = do_write(fd, attr->id, attr->ids * sizeof(u64));
465 pr_debug("failed to write perf header\n");
468 if (session->evlist != evlist) {
469 err = do_write(fd, pair->id, pair->ids * sizeof(u64));
472 attr->ids += pair->ids;
473 pair = list_entry(pair->node.next, struct perf_evsel, node);
477 header->attr_offset = lseek(fd, 0, SEEK_CUR);
479 list_for_each_entry(attr, &evlist->entries, node) {
480 f_attr = (struct perf_file_attr){
483 .offset = attr->id_offset,
484 .size = attr->ids * sizeof(u64),
487 err = do_write(fd, &f_attr, sizeof(f_attr));
489 pr_debug("failed to write perf header attribute\n");
494 header->event_offset = lseek(fd, 0, SEEK_CUR);
495 header->event_size = event_count * sizeof(struct perf_trace_event_type);
497 err = do_write(fd, events, header->event_size);
499 pr_debug("failed to write perf header events\n");
504 header->data_offset = lseek(fd, 0, SEEK_CUR);
507 err = perf_header__adds_write(header, evlist, fd);
512 f_header = (struct perf_file_header){
514 .size = sizeof(f_header),
515 .attr_size = sizeof(f_attr),
517 .offset = header->attr_offset,
518 .size = evlist->nr_entries * sizeof(f_attr),
521 .offset = header->data_offset,
522 .size = header->data_size,
525 .offset = header->event_offset,
526 .size = header->event_size,
530 memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features));
532 lseek(fd, 0, SEEK_SET);
533 err = do_write(fd, &f_header, sizeof(f_header));
535 pr_debug("failed to write perf header\n");
538 lseek(fd, header->data_offset + header->data_size, SEEK_SET);
544 static int perf_header__getbuffer64(struct perf_header *header,
545 int fd, void *buf, size_t size)
547 if (readn(fd, buf, size) <= 0)
550 if (header->needs_swap)
551 mem_bswap_64(buf, size);
556 int perf_header__process_sections(struct perf_header *header, int fd,
557 int (*process)(struct perf_file_section *section,
558 struct perf_header *ph,
561 struct perf_file_section *feat_sec;
565 int err = -1, feat = 1;
567 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
571 feat_sec = calloc(sizeof(*feat_sec), nr_sections);
575 sec_size = sizeof(*feat_sec) * nr_sections;
577 lseek(fd, header->data_offset + header->data_size, SEEK_SET);
579 if (perf_header__getbuffer64(header, fd, feat_sec, sec_size))
583 while (idx < nr_sections && feat < HEADER_LAST_FEATURE) {
584 if (perf_header__has_feat(header, feat)) {
585 struct perf_file_section *sec = &feat_sec[idx++];
587 err = process(sec, header, feat, fd);
598 int perf_file_header__read(struct perf_file_header *header,
599 struct perf_header *ph, int fd)
601 lseek(fd, 0, SEEK_SET);
603 if (readn(fd, header, sizeof(*header)) <= 0 ||
604 memcmp(&header->magic, __perf_magic, sizeof(header->magic)))
607 if (header->attr_size != sizeof(struct perf_file_attr)) {
608 u64 attr_size = bswap_64(header->attr_size);
610 if (attr_size != sizeof(struct perf_file_attr))
613 mem_bswap_64(header, offsetof(struct perf_file_header,
615 ph->needs_swap = true;
618 if (header->size != sizeof(*header)) {
619 /* Support the previous format */
620 if (header->size == offsetof(typeof(*header), adds_features))
621 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
626 memcpy(&ph->adds_features, &header->adds_features,
627 sizeof(ph->adds_features));
629 * FIXME: hack that assumes that if we need swap the perf.data file
630 * may be coming from an arch with a different word-size, ergo different
631 * DEFINE_BITMAP format, investigate more later, but for now its mostly
632 * safe to assume that we have a build-id section. Trace files probably
633 * have several other issues in this realm anyway...
635 if (ph->needs_swap) {
636 memset(&ph->adds_features, 0, sizeof(ph->adds_features));
637 perf_header__set_feat(ph, HEADER_BUILD_ID);
640 ph->event_offset = header->event_types.offset;
641 ph->event_size = header->event_types.size;
642 ph->data_offset = header->data.offset;
643 ph->data_size = header->data.size;
647 static int __event_process_build_id(struct build_id_event *bev,
649 struct perf_session *session)
652 struct list_head *head;
653 struct machine *machine;
656 enum dso_kernel_type dso_type;
658 machine = perf_session__findnew_machine(session, bev->pid);
662 misc = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
665 case PERF_RECORD_MISC_KERNEL:
666 dso_type = DSO_TYPE_KERNEL;
667 head = &machine->kernel_dsos;
669 case PERF_RECORD_MISC_GUEST_KERNEL:
670 dso_type = DSO_TYPE_GUEST_KERNEL;
671 head = &machine->kernel_dsos;
673 case PERF_RECORD_MISC_USER:
674 case PERF_RECORD_MISC_GUEST_USER:
675 dso_type = DSO_TYPE_USER;
676 head = &machine->user_dsos;
682 dso = __dsos__findnew(head, filename);
684 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
686 dso__set_build_id(dso, &bev->build_id);
688 if (filename[0] == '[')
689 dso->kernel = dso_type;
691 build_id__sprintf(dso->build_id, sizeof(dso->build_id),
693 pr_debug("build id event received for %s: %s\n",
694 dso->long_name, sbuild_id);
702 static int perf_header__read_build_ids_abi_quirk(struct perf_header *header,
703 int input, u64 offset, u64 size)
705 struct perf_session *session = container_of(header, struct perf_session, header);
707 struct perf_event_header header;
708 u8 build_id[ALIGN(BUILD_ID_SIZE, sizeof(u64))];
711 struct build_id_event bev;
712 char filename[PATH_MAX];
713 u64 limit = offset + size;
715 while (offset < limit) {
718 if (read(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev))
721 if (header->needs_swap)
722 perf_event_header__bswap(&old_bev.header);
724 len = old_bev.header.size - sizeof(old_bev);
725 if (read(input, filename, len) != len)
728 bev.header = old_bev.header;
730 memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id));
731 __event_process_build_id(&bev, filename, session);
733 offset += bev.header.size;
739 static int perf_header__read_build_ids(struct perf_header *header,
740 int input, u64 offset, u64 size)
742 struct perf_session *session = container_of(header, struct perf_session, header);
743 struct build_id_event bev;
744 char filename[PATH_MAX];
745 u64 limit = offset + size, orig_offset = offset;
748 while (offset < limit) {
751 if (read(input, &bev, sizeof(bev)) != sizeof(bev))
754 if (header->needs_swap)
755 perf_event_header__bswap(&bev.header);
757 len = bev.header.size - sizeof(bev);
758 if (read(input, filename, len) != len)
761 * The a1645ce1 changeset:
763 * "perf: 'perf kvm' tool for monitoring guest performance from host"
765 * Added a field to struct build_id_event that broke the file
768 * Since the kernel build-id is the first entry, process the
769 * table using the old format if the well known
770 * '[kernel.kallsyms]' string for the kernel build-id has the
771 * first 4 characters chopped off (where the pid_t sits).
773 if (memcmp(filename, "nel.kallsyms]", 13) == 0) {
774 if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1)
776 return perf_header__read_build_ids_abi_quirk(header, input, offset, size);
779 __event_process_build_id(&bev, filename, session);
781 offset += bev.header.size;
788 static int perf_file_section__process(struct perf_file_section *section,
789 struct perf_header *ph,
792 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
793 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
794 "%d, continuing...\n", section->offset, feat);
799 case HEADER_TRACE_INFO:
800 trace_report(fd, false);
803 case HEADER_BUILD_ID:
804 if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
805 pr_debug("Failed to read buildids, continuing...\n");
808 pr_debug("unknown feature %d, continuing...\n", feat);
814 static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
815 struct perf_header *ph, int fd,
818 if (readn(fd, header, sizeof(*header)) <= 0 ||
819 memcmp(&header->magic, __perf_magic, sizeof(header->magic)))
822 if (repipe && do_write(STDOUT_FILENO, header, sizeof(*header)) < 0)
825 if (header->size != sizeof(*header)) {
826 u64 size = bswap_64(header->size);
828 if (size != sizeof(*header))
831 ph->needs_swap = true;
837 static int perf_header__read_pipe(struct perf_session *session, int fd)
839 struct perf_header *header = &session->header;
840 struct perf_pipe_file_header f_header;
842 if (perf_file_header__read_pipe(&f_header, header, fd,
843 session->repipe) < 0) {
844 pr_debug("incompatible file format\n");
853 int perf_session__read_header(struct perf_session *session, int fd)
855 struct perf_header *header = &session->header;
856 struct perf_file_header f_header;
857 struct perf_file_attr f_attr;
859 int nr_attrs, nr_ids, i, j;
861 session->evlist = perf_evlist__new(NULL, NULL);
862 if (session->evlist == NULL)
865 if (session->fd_pipe)
866 return perf_header__read_pipe(session, fd);
868 if (perf_file_header__read(&f_header, header, fd) < 0) {
869 pr_debug("incompatible file format\n");
873 nr_attrs = f_header.attrs.size / sizeof(f_attr);
874 lseek(fd, f_header.attrs.offset, SEEK_SET);
876 for (i = 0; i < nr_attrs; i++) {
877 struct perf_evsel *evsel;
880 if (readn(fd, &f_attr, sizeof(f_attr)) <= 0)
883 if (header->needs_swap)
884 perf_event__attr_swap(&f_attr.attr);
886 tmp = lseek(fd, 0, SEEK_CUR);
887 evsel = perf_evsel__new(&f_attr.attr, i);
890 goto out_delete_evlist;
892 * Do it before so that if perf_evsel__alloc_id fails, this
893 * entry gets purged too at perf_evlist__delete().
895 perf_evlist__add(session->evlist, evsel);
897 nr_ids = f_attr.ids.size / sizeof(u64);
899 * We don't have the cpu and thread maps on the header, so
900 * for allocating the perf_sample_id table we fake 1 cpu and
901 * hattr->ids threads.
903 if (perf_evsel__alloc_id(evsel, 1, nr_ids))
904 goto out_delete_evlist;
906 lseek(fd, f_attr.ids.offset, SEEK_SET);
908 for (j = 0; j < nr_ids; j++) {
909 if (perf_header__getbuffer64(header, fd, &f_id, sizeof(f_id)))
912 perf_evlist__id_add(session->evlist, evsel, 0, j, f_id);
915 lseek(fd, tmp, SEEK_SET);
918 if (f_header.event_types.size) {
919 lseek(fd, f_header.event_types.offset, SEEK_SET);
920 events = malloc(f_header.event_types.size);
923 if (perf_header__getbuffer64(header, fd, events,
924 f_header.event_types.size))
926 event_count = f_header.event_types.size / sizeof(struct perf_trace_event_type);
929 perf_header__process_sections(header, fd, perf_file_section__process);
931 lseek(fd, header->data_offset, SEEK_SET);
939 perf_evlist__delete(session->evlist);
940 session->evlist = NULL;
944 int perf_event__synthesize_attr(struct perf_event_attr *attr, u16 ids, u64 *id,
945 perf_event__handler_t process,
946 struct perf_session *session)
948 union perf_event *ev;
952 size = sizeof(struct perf_event_attr);
953 size = ALIGN(size, sizeof(u64));
954 size += sizeof(struct perf_event_header);
955 size += ids * sizeof(u64);
962 ev->attr.attr = *attr;
963 memcpy(ev->attr.id, id, ids * sizeof(u64));
965 ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
966 ev->attr.header.size = size;
968 err = process(ev, NULL, session);
975 int perf_session__synthesize_attrs(struct perf_session *session,
976 perf_event__handler_t process)
978 struct perf_evsel *attr;
981 list_for_each_entry(attr, &session->evlist->entries, node) {
982 err = perf_event__synthesize_attr(&attr->attr, attr->ids,
983 attr->id, process, session);
985 pr_debug("failed to create perf header attribute\n");
993 int perf_event__process_attr(union perf_event *event,
994 struct perf_session *session)
996 unsigned int i, ids, n_ids;
997 struct perf_evsel *evsel;
999 if (session->evlist == NULL) {
1000 session->evlist = perf_evlist__new(NULL, NULL);
1001 if (session->evlist == NULL)
1005 evsel = perf_evsel__new(&event->attr.attr,
1006 session->evlist->nr_entries);
1010 perf_evlist__add(session->evlist, evsel);
1012 ids = event->header.size;
1013 ids -= (void *)&event->attr.id - (void *)event;
1014 n_ids = ids / sizeof(u64);
1016 * We don't have the cpu and thread maps on the header, so
1017 * for allocating the perf_sample_id table we fake 1 cpu and
1018 * hattr->ids threads.
1020 if (perf_evsel__alloc_id(evsel, 1, n_ids))
1023 for (i = 0; i < n_ids; i++) {
1024 perf_evlist__id_add(session->evlist, evsel, 0, i,
1028 perf_session__update_sample_type(session);
1033 int perf_event__synthesize_event_type(u64 event_id, char *name,
1034 perf_event__handler_t process,
1035 struct perf_session *session)
1037 union perf_event ev;
1041 memset(&ev, 0, sizeof(ev));
1043 ev.event_type.event_type.event_id = event_id;
1044 memset(ev.event_type.event_type.name, 0, MAX_EVENT_NAME);
1045 strncpy(ev.event_type.event_type.name, name, MAX_EVENT_NAME - 1);
1047 ev.event_type.header.type = PERF_RECORD_HEADER_EVENT_TYPE;
1048 size = strlen(name);
1049 size = ALIGN(size, sizeof(u64));
1050 ev.event_type.header.size = sizeof(ev.event_type) -
1051 (sizeof(ev.event_type.event_type.name) - size);
1053 err = process(&ev, NULL, session);
1058 int perf_event__synthesize_event_types(perf_event__handler_t process,
1059 struct perf_session *session)
1061 struct perf_trace_event_type *type;
1064 for (i = 0; i < event_count; i++) {
1067 err = perf_event__synthesize_event_type(type->event_id,
1068 type->name, process,
1071 pr_debug("failed to create perf header event type\n");
1079 int perf_event__process_event_type(union perf_event *event,
1080 struct perf_session *session __unused)
1082 if (perf_header__push_event(event->event_type.event_type.event_id,
1083 event->event_type.event_type.name) < 0)
1089 int perf_event__synthesize_tracing_data(int fd, struct perf_evlist *evlist,
1090 perf_event__handler_t process,
1091 struct perf_session *session __unused)
1093 union perf_event ev;
1094 ssize_t size = 0, aligned_size = 0, padding;
1097 memset(&ev, 0, sizeof(ev));
1099 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
1100 size = read_tracing_data_size(fd, &evlist->entries);
1103 aligned_size = ALIGN(size, sizeof(u64));
1104 padding = aligned_size - size;
1105 ev.tracing_data.header.size = sizeof(ev.tracing_data);
1106 ev.tracing_data.size = aligned_size;
1108 process(&ev, NULL, session);
1110 err = read_tracing_data(fd, &evlist->entries);
1111 write_padded(fd, NULL, 0, padding);
1113 return aligned_size;
1116 int perf_event__process_tracing_data(union perf_event *event,
1117 struct perf_session *session)
1119 ssize_t size_read, padding, size = event->tracing_data.size;
1120 off_t offset = lseek(session->fd, 0, SEEK_CUR);
1123 /* setup for reading amidst mmap */
1124 lseek(session->fd, offset + sizeof(struct tracing_data_event),
1127 size_read = trace_report(session->fd, session->repipe);
1129 padding = ALIGN(size_read, sizeof(u64)) - size_read;
1131 if (read(session->fd, buf, padding) < 0)
1132 die("reading input file");
1133 if (session->repipe) {
1134 int retw = write(STDOUT_FILENO, buf, padding);
1135 if (retw <= 0 || retw != padding)
1136 die("repiping tracing data padding");
1139 if (size_read + padding != size)
1140 die("tracing data size mismatch");
1142 return size_read + padding;
1145 int perf_event__synthesize_build_id(struct dso *pos, u16 misc,
1146 perf_event__handler_t process,
1147 struct machine *machine,
1148 struct perf_session *session)
1150 union perf_event ev;
1157 memset(&ev, 0, sizeof(ev));
1159 len = pos->long_name_len + 1;
1160 len = ALIGN(len, NAME_ALIGN);
1161 memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
1162 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
1163 ev.build_id.header.misc = misc;
1164 ev.build_id.pid = machine->pid;
1165 ev.build_id.header.size = sizeof(ev.build_id) + len;
1166 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
1168 err = process(&ev, NULL, session);
1173 int perf_event__process_build_id(union perf_event *event,
1174 struct perf_session *session)
1176 __event_process_build_id(&event->build_id,
1177 event->build_id.filename,
1182 void disable_buildid_cache(void)
1184 no_buildid_cache = true;