1 #define _FILE_OFFSET_BITS 64
8 #include <linux/list.h>
9 #include <linux/kernel.h>
14 #include "trace-event.h"
19 static bool no_buildid_cache = false;
22 * Create new perf.data header attribute:
24 struct perf_header_attr *perf_header_attr__new(struct perf_event_attr *attr)
26 struct perf_header_attr *self = malloc(sizeof(*self));
32 self->id = malloc(sizeof(u64));
33 if (self->id == NULL) {
42 void perf_header_attr__delete(struct perf_header_attr *self)
48 int perf_header_attr__add_id(struct perf_header_attr *self, u64 id)
53 if (self->ids > self->size) {
54 int nsize = self->size * 2;
55 u64 *nid = realloc(self->id, nsize * sizeof(u64));
67 int perf_header__init(struct perf_header *self)
70 self->attr = malloc(sizeof(void *));
71 return self->attr == NULL ? -ENOMEM : 0;
74 void perf_header__exit(struct perf_header *self)
77 for (i = 0; i < self->attrs; ++i)
78 perf_header_attr__delete(self->attr[i]);
82 int perf_header__add_attr(struct perf_header *self,
83 struct perf_header_attr *attr)
88 if (self->attrs == self->size) {
89 int nsize = self->size * 2;
90 struct perf_header_attr **nattr;
92 nattr = realloc(self->attr, nsize * sizeof(void *));
100 self->attr[self->attrs++] = attr;
104 static int event_count;
105 static struct perf_trace_event_type *events;
107 int perf_header__push_event(u64 id, const char *name)
109 if (strlen(name) > MAX_EVENT_NAME)
110 pr_warning("Event %s will be truncated\n", name);
113 events = malloc(sizeof(struct perf_trace_event_type));
117 struct perf_trace_event_type *nevents;
119 nevents = realloc(events, (event_count + 1) * sizeof(*events));
124 memset(&events[event_count], 0, sizeof(struct perf_trace_event_type));
125 events[event_count].event_id = id;
126 strncpy(events[event_count].name, name, MAX_EVENT_NAME - 1);
131 char *perf_header__find_event(u64 id)
134 for (i = 0 ; i < event_count; i++) {
135 if (events[i].event_id == id)
136 return events[i].name;
141 static const char *__perf_magic = "PERFFILE";
143 #define PERF_MAGIC (*(u64 *)__perf_magic)
145 struct perf_file_attr {
146 struct perf_event_attr attr;
147 struct perf_file_section ids;
150 void perf_header__set_feat(struct perf_header *self, int feat)
152 set_bit(feat, self->adds_features);
155 bool perf_header__has_feat(const struct perf_header *self, int feat)
157 return test_bit(feat, self->adds_features);
160 static int do_write(int fd, const void *buf, size_t size)
163 int ret = write(fd, buf, size);
175 #define NAME_ALIGN 64
177 static int write_padded(int fd, const void *bf, size_t count,
178 size_t count_aligned)
180 static const char zero_buf[NAME_ALIGN];
181 int err = do_write(fd, bf, count);
184 err = do_write(fd, zero_buf, count_aligned - count);
189 #define dsos__for_each_with_build_id(pos, head) \
190 list_for_each_entry(pos, head, node) \
191 if (!pos->has_build_id) \
195 static int __dsos__write_buildid_table(struct list_head *head, pid_t pid,
200 dsos__for_each_with_build_id(pos, head) {
202 struct build_id_event b;
207 len = pos->long_name_len + 1;
208 len = ALIGN(len, NAME_ALIGN);
209 memset(&b, 0, sizeof(b));
210 memcpy(&b.build_id, pos->build_id, sizeof(pos->build_id));
212 b.header.misc = misc;
213 b.header.size = sizeof(b) + len;
214 err = do_write(fd, &b, sizeof(b));
217 err = write_padded(fd, pos->long_name,
218 pos->long_name_len + 1, len);
226 static int machine__write_buildid_table(struct machine *self, int fd)
229 u16 kmisc = PERF_RECORD_MISC_KERNEL,
230 umisc = PERF_RECORD_MISC_USER;
232 if (!machine__is_host(self)) {
233 kmisc = PERF_RECORD_MISC_GUEST_KERNEL;
234 umisc = PERF_RECORD_MISC_GUEST_USER;
237 err = __dsos__write_buildid_table(&self->kernel_dsos, self->pid,
240 err = __dsos__write_buildid_table(&self->user_dsos,
241 self->pid, umisc, fd);
245 static int dsos__write_buildid_table(struct perf_header *header, int fd)
247 struct perf_session *session = container_of(header,
248 struct perf_session, header);
250 int err = machine__write_buildid_table(&session->host_machine, fd);
255 for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
256 struct machine *pos = rb_entry(nd, struct machine, rb_node);
257 err = machine__write_buildid_table(pos, fd);
264 int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
265 const char *name, bool is_kallsyms)
267 const size_t size = PATH_MAX;
268 char *filename = malloc(size),
269 *linkname = malloc(size), *targetname;
272 if (filename == NULL || linkname == NULL)
275 len = snprintf(filename, size, "%s%s%s",
276 debugdir, is_kallsyms ? "/" : "", name);
277 if (mkdir_p(filename, 0755))
280 snprintf(filename + len, sizeof(filename) - len, "/%s", sbuild_id);
282 if (access(filename, F_OK)) {
284 if (copyfile("/proc/kallsyms", filename))
286 } else if (link(name, filename) && copyfile(name, filename))
290 len = snprintf(linkname, size, "%s/.build-id/%.2s",
291 debugdir, sbuild_id);
293 if (access(linkname, X_OK) && mkdir_p(linkname, 0755))
296 snprintf(linkname + len, size - len, "/%s", sbuild_id + 2);
297 targetname = filename + strlen(debugdir) - 5;
298 memcpy(targetname, "../..", 5);
300 if (symlink(targetname, linkname) == 0)
308 static int build_id_cache__add_b(const u8 *build_id, size_t build_id_size,
309 const char *name, const char *debugdir,
312 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
314 build_id__sprintf(build_id, build_id_size, sbuild_id);
316 return build_id_cache__add_s(sbuild_id, debugdir, name, is_kallsyms);
319 int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir)
321 const size_t size = PATH_MAX;
322 char *filename = malloc(size),
323 *linkname = malloc(size);
326 if (filename == NULL || linkname == NULL)
329 snprintf(linkname, size, "%s/.build-id/%.2s/%s",
330 debugdir, sbuild_id, sbuild_id + 2);
332 if (access(linkname, F_OK))
335 if (readlink(linkname, filename, size) < 0)
338 if (unlink(linkname))
342 * Since the link is relative, we must make it absolute:
344 snprintf(linkname, size, "%s/.build-id/%.2s/%s",
345 debugdir, sbuild_id, filename);
347 if (unlink(linkname))
357 static int dso__cache_build_id(struct dso *self, const char *debugdir)
359 bool is_kallsyms = self->kernel && self->long_name[0] != '/';
361 return build_id_cache__add_b(self->build_id, sizeof(self->build_id),
362 self->long_name, debugdir, is_kallsyms);
365 static int __dsos__cache_build_ids(struct list_head *head, const char *debugdir)
370 dsos__for_each_with_build_id(pos, head)
371 if (dso__cache_build_id(pos, debugdir))
377 static int machine__cache_build_ids(struct machine *self, const char *debugdir)
379 int ret = __dsos__cache_build_ids(&self->kernel_dsos, debugdir);
380 ret |= __dsos__cache_build_ids(&self->user_dsos, debugdir);
384 static int perf_session__cache_build_ids(struct perf_session *self)
388 char debugdir[PATH_MAX];
390 snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir);
392 if (mkdir(debugdir, 0755) != 0 && errno != EEXIST)
395 ret = machine__cache_build_ids(&self->host_machine, debugdir);
397 for (nd = rb_first(&self->machines); nd; nd = rb_next(nd)) {
398 struct machine *pos = rb_entry(nd, struct machine, rb_node);
399 ret |= machine__cache_build_ids(pos, debugdir);
404 static bool machine__read_build_ids(struct machine *self, bool with_hits)
406 bool ret = __dsos__read_build_ids(&self->kernel_dsos, with_hits);
407 ret |= __dsos__read_build_ids(&self->user_dsos, with_hits);
411 static bool perf_session__read_build_ids(struct perf_session *self, bool with_hits)
414 bool ret = machine__read_build_ids(&self->host_machine, with_hits);
416 for (nd = rb_first(&self->machines); nd; nd = rb_next(nd)) {
417 struct machine *pos = rb_entry(nd, struct machine, rb_node);
418 ret |= machine__read_build_ids(pos, with_hits);
424 static int perf_header__adds_write(struct perf_header *self, int fd)
427 struct perf_session *session;
428 struct perf_file_section *feat_sec;
433 session = container_of(self, struct perf_session, header);
434 if (perf_session__read_build_ids(session, true))
435 perf_header__set_feat(self, HEADER_BUILD_ID);
437 nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS);
441 feat_sec = calloc(sizeof(*feat_sec), nr_sections);
442 if (feat_sec == NULL)
445 sec_size = sizeof(*feat_sec) * nr_sections;
447 sec_start = self->data_offset + self->data_size;
448 lseek(fd, sec_start + sec_size, SEEK_SET);
450 if (perf_header__has_feat(self, HEADER_TRACE_INFO)) {
451 struct perf_file_section *trace_sec;
453 trace_sec = &feat_sec[idx++];
455 /* Write trace info */
456 trace_sec->offset = lseek(fd, 0, SEEK_CUR);
457 read_tracing_data(fd, attrs, nr_counters);
458 trace_sec->size = lseek(fd, 0, SEEK_CUR) - trace_sec->offset;
461 if (perf_header__has_feat(self, HEADER_BUILD_ID)) {
462 struct perf_file_section *buildid_sec;
464 buildid_sec = &feat_sec[idx++];
466 /* Write build-ids */
467 buildid_sec->offset = lseek(fd, 0, SEEK_CUR);
468 err = dsos__write_buildid_table(self, fd);
470 pr_debug("failed to write buildid table\n");
473 buildid_sec->size = lseek(fd, 0, SEEK_CUR) -
475 if (!no_buildid_cache)
476 perf_session__cache_build_ids(session);
479 lseek(fd, sec_start, SEEK_SET);
480 err = do_write(fd, feat_sec, sec_size);
482 pr_debug("failed to write feature section\n");
488 int perf_header__write_pipe(int fd)
490 struct perf_pipe_file_header f_header;
493 f_header = (struct perf_pipe_file_header){
495 .size = sizeof(f_header),
498 err = do_write(fd, &f_header, sizeof(f_header));
500 pr_debug("failed to write perf pipe header\n");
507 int perf_header__write(struct perf_header *self, int fd, bool at_exit)
509 struct perf_file_header f_header;
510 struct perf_file_attr f_attr;
511 struct perf_header_attr *attr;
514 lseek(fd, sizeof(f_header), SEEK_SET);
516 for (i = 0; i < self->attrs; i++) {
517 attr = self->attr[i];
519 attr->id_offset = lseek(fd, 0, SEEK_CUR);
520 err = do_write(fd, attr->id, attr->ids * sizeof(u64));
522 pr_debug("failed to write perf header\n");
528 self->attr_offset = lseek(fd, 0, SEEK_CUR);
530 for (i = 0; i < self->attrs; i++) {
531 attr = self->attr[i];
533 f_attr = (struct perf_file_attr){
536 .offset = attr->id_offset,
537 .size = attr->ids * sizeof(u64),
540 err = do_write(fd, &f_attr, sizeof(f_attr));
542 pr_debug("failed to write perf header attribute\n");
547 self->event_offset = lseek(fd, 0, SEEK_CUR);
548 self->event_size = event_count * sizeof(struct perf_trace_event_type);
550 err = do_write(fd, events, self->event_size);
552 pr_debug("failed to write perf header events\n");
557 self->data_offset = lseek(fd, 0, SEEK_CUR);
560 err = perf_header__adds_write(self, fd);
565 f_header = (struct perf_file_header){
567 .size = sizeof(f_header),
568 .attr_size = sizeof(f_attr),
570 .offset = self->attr_offset,
571 .size = self->attrs * sizeof(f_attr),
574 .offset = self->data_offset,
575 .size = self->data_size,
578 .offset = self->event_offset,
579 .size = self->event_size,
583 memcpy(&f_header.adds_features, &self->adds_features, sizeof(self->adds_features));
585 lseek(fd, 0, SEEK_SET);
586 err = do_write(fd, &f_header, sizeof(f_header));
588 pr_debug("failed to write perf header\n");
591 lseek(fd, self->data_offset + self->data_size, SEEK_SET);
597 static int perf_header__getbuffer64(struct perf_header *self,
598 int fd, void *buf, size_t size)
600 if (do_read(fd, buf, size) <= 0)
603 if (self->needs_swap)
604 mem_bswap_64(buf, size);
609 int perf_header__process_sections(struct perf_header *self, int fd,
610 int (*process)(struct perf_file_section *self,
611 struct perf_header *ph,
614 struct perf_file_section *feat_sec;
618 int err = -1, feat = 1;
620 nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS);
624 feat_sec = calloc(sizeof(*feat_sec), nr_sections);
628 sec_size = sizeof(*feat_sec) * nr_sections;
630 lseek(fd, self->data_offset + self->data_size, SEEK_SET);
632 if (perf_header__getbuffer64(self, fd, feat_sec, sec_size))
636 while (idx < nr_sections && feat < HEADER_LAST_FEATURE) {
637 if (perf_header__has_feat(self, feat)) {
638 struct perf_file_section *sec = &feat_sec[idx++];
640 err = process(sec, self, feat, fd);
651 int perf_file_header__read(struct perf_file_header *self,
652 struct perf_header *ph, int fd)
654 lseek(fd, 0, SEEK_SET);
656 if (do_read(fd, self, sizeof(*self)) <= 0 ||
657 memcmp(&self->magic, __perf_magic, sizeof(self->magic)))
660 if (self->attr_size != sizeof(struct perf_file_attr)) {
661 u64 attr_size = bswap_64(self->attr_size);
663 if (attr_size != sizeof(struct perf_file_attr))
666 mem_bswap_64(self, offsetof(struct perf_file_header,
668 ph->needs_swap = true;
671 if (self->size != sizeof(*self)) {
672 /* Support the previous format */
673 if (self->size == offsetof(typeof(*self), adds_features))
674 bitmap_zero(self->adds_features, HEADER_FEAT_BITS);
679 memcpy(&ph->adds_features, &self->adds_features,
680 sizeof(ph->adds_features));
682 * FIXME: hack that assumes that if we need swap the perf.data file
683 * may be coming from an arch with a different word-size, ergo different
684 * DEFINE_BITMAP format, investigate more later, but for now its mostly
685 * safe to assume that we have a build-id section. Trace files probably
686 * have several other issues in this realm anyway...
688 if (ph->needs_swap) {
689 memset(&ph->adds_features, 0, sizeof(ph->adds_features));
690 perf_header__set_feat(ph, HEADER_BUILD_ID);
693 ph->event_offset = self->event_types.offset;
694 ph->event_size = self->event_types.size;
695 ph->data_offset = self->data.offset;
696 ph->data_size = self->data.size;
700 static int __event_process_build_id(struct build_id_event *bev,
702 struct perf_session *session)
705 struct list_head *head;
706 struct machine *machine;
709 enum dso_kernel_type dso_type;
711 machine = perf_session__findnew_machine(session, bev->pid);
715 misc = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
718 case PERF_RECORD_MISC_KERNEL:
719 dso_type = DSO_TYPE_KERNEL;
720 head = &machine->kernel_dsos;
722 case PERF_RECORD_MISC_GUEST_KERNEL:
723 dso_type = DSO_TYPE_GUEST_KERNEL;
724 head = &machine->kernel_dsos;
726 case PERF_RECORD_MISC_USER:
727 case PERF_RECORD_MISC_GUEST_USER:
728 dso_type = DSO_TYPE_USER;
729 head = &machine->user_dsos;
735 dso = __dsos__findnew(head, filename);
737 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
739 dso__set_build_id(dso, &bev->build_id);
741 if (filename[0] == '[')
742 dso->kernel = dso_type;
744 build_id__sprintf(dso->build_id, sizeof(dso->build_id),
746 pr_debug("build id event received for %s: %s\n",
747 dso->long_name, sbuild_id);
755 static int perf_header__read_build_ids(struct perf_header *self,
756 int input, u64 offset, u64 size)
758 struct perf_session *session = container_of(self,
759 struct perf_session, header);
760 struct build_id_event bev;
761 char filename[PATH_MAX];
762 u64 limit = offset + size;
765 while (offset < limit) {
768 if (read(input, &bev, sizeof(bev)) != sizeof(bev))
771 if (self->needs_swap)
772 perf_event_header__bswap(&bev.header);
774 len = bev.header.size - sizeof(bev);
775 if (read(input, filename, len) != len)
778 __event_process_build_id(&bev, filename, session);
780 offset += bev.header.size;
787 static int perf_file_section__process(struct perf_file_section *self,
788 struct perf_header *ph,
791 if (lseek(fd, self->offset, SEEK_SET) == (off_t)-1) {
792 pr_debug("Failed to lseek to %Ld offset for feature %d, "
793 "continuing...\n", self->offset, feat);
798 case HEADER_TRACE_INFO:
799 trace_report(fd, false);
802 case HEADER_BUILD_ID:
803 if (perf_header__read_build_ids(ph, fd, self->offset, self->size))
804 pr_debug("Failed to read buildids, continuing...\n");
807 pr_debug("unknown feature %d, continuing...\n", feat);
813 static int perf_file_header__read_pipe(struct perf_pipe_file_header *self,
814 struct perf_header *ph, int fd,
817 if (do_read(fd, self, sizeof(*self)) <= 0 ||
818 memcmp(&self->magic, __perf_magic, sizeof(self->magic)))
821 if (repipe && do_write(STDOUT_FILENO, self, sizeof(*self)) < 0)
824 if (self->size != sizeof(*self)) {
825 u64 size = bswap_64(self->size);
827 if (size != sizeof(*self))
830 ph->needs_swap = true;
836 static int perf_header__read_pipe(struct perf_session *session, int fd)
838 struct perf_header *self = &session->header;
839 struct perf_pipe_file_header f_header;
841 if (perf_file_header__read_pipe(&f_header, self, fd,
842 session->repipe) < 0) {
843 pr_debug("incompatible file format\n");
852 int perf_header__read(struct perf_session *session, int fd)
854 struct perf_header *self = &session->header;
855 struct perf_file_header f_header;
856 struct perf_file_attr f_attr;
858 int nr_attrs, nr_ids, i, j;
860 if (session->fd_pipe)
861 return perf_header__read_pipe(session, fd);
863 if (perf_file_header__read(&f_header, self, fd) < 0) {
864 pr_debug("incompatible file format\n");
868 nr_attrs = f_header.attrs.size / sizeof(f_attr);
869 lseek(fd, f_header.attrs.offset, SEEK_SET);
871 for (i = 0; i < nr_attrs; i++) {
872 struct perf_header_attr *attr;
875 if (perf_header__getbuffer64(self, fd, &f_attr, sizeof(f_attr)))
878 tmp = lseek(fd, 0, SEEK_CUR);
880 attr = perf_header_attr__new(&f_attr.attr);
884 nr_ids = f_attr.ids.size / sizeof(u64);
885 lseek(fd, f_attr.ids.offset, SEEK_SET);
887 for (j = 0; j < nr_ids; j++) {
888 if (perf_header__getbuffer64(self, fd, &f_id, sizeof(f_id)))
891 if (perf_header_attr__add_id(attr, f_id) < 0) {
892 perf_header_attr__delete(attr);
896 if (perf_header__add_attr(self, attr) < 0) {
897 perf_header_attr__delete(attr);
901 lseek(fd, tmp, SEEK_SET);
904 if (f_header.event_types.size) {
905 lseek(fd, f_header.event_types.offset, SEEK_SET);
906 events = malloc(f_header.event_types.size);
909 if (perf_header__getbuffer64(self, fd, events,
910 f_header.event_types.size))
912 event_count = f_header.event_types.size / sizeof(struct perf_trace_event_type);
915 perf_header__process_sections(self, fd, perf_file_section__process);
917 lseek(fd, self->data_offset, SEEK_SET);
925 u64 perf_header__sample_type(struct perf_header *header)
930 for (i = 0; i < header->attrs; i++) {
931 struct perf_header_attr *attr = header->attr[i];
934 type = attr->attr.sample_type;
935 else if (type != attr->attr.sample_type)
936 die("non matching sample_type");
942 struct perf_event_attr *
943 perf_header__find_attr(u64 id, struct perf_header *header)
948 * We set id to -1 if the data file doesn't contain sample
949 * ids. Check for this and avoid walking through the entire
950 * list of ids which may be large.
955 for (i = 0; i < header->attrs; i++) {
956 struct perf_header_attr *attr = header->attr[i];
959 for (j = 0; j < attr->ids; j++) {
960 if (attr->id[j] == id)
968 int event__synthesize_attr(struct perf_event_attr *attr, u16 ids, u64 *id,
969 event__handler_t process,
970 struct perf_session *session)
976 size = sizeof(struct perf_event_attr);
977 size = ALIGN(size, sizeof(u64));
978 size += sizeof(struct perf_event_header);
979 size += ids * sizeof(u64);
983 ev->attr.attr = *attr;
984 memcpy(ev->attr.id, id, ids * sizeof(u64));
986 ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
987 ev->attr.header.size = size;
989 err = process(ev, session);
996 int event__synthesize_attrs(struct perf_header *self,
997 event__handler_t process,
998 struct perf_session *session)
1000 struct perf_header_attr *attr;
1003 for (i = 0; i < self->attrs; i++) {
1004 attr = self->attr[i];
1006 err = event__synthesize_attr(&attr->attr, attr->ids, attr->id,
1009 pr_debug("failed to create perf header attribute\n");
1017 int event__process_attr(event_t *self, struct perf_session *session)
1019 struct perf_header_attr *attr;
1020 unsigned int i, ids, n_ids;
1022 attr = perf_header_attr__new(&self->attr.attr);
1026 ids = self->header.size;
1027 ids -= (void *)&self->attr.id - (void *)self;
1028 n_ids = ids / sizeof(u64);
1030 for (i = 0; i < n_ids; i++) {
1031 if (perf_header_attr__add_id(attr, self->attr.id[i]) < 0) {
1032 perf_header_attr__delete(attr);
1037 if (perf_header__add_attr(&session->header, attr) < 0) {
1038 perf_header_attr__delete(attr);
1042 perf_session__update_sample_type(session);
1047 int event__synthesize_event_type(u64 event_id, char *name,
1048 event__handler_t process,
1049 struct perf_session *session)
1055 memset(&ev, 0, sizeof(ev));
1057 ev.event_type.event_type.event_id = event_id;
1058 memset(ev.event_type.event_type.name, 0, MAX_EVENT_NAME);
1059 strncpy(ev.event_type.event_type.name, name, MAX_EVENT_NAME - 1);
1061 ev.event_type.header.type = PERF_RECORD_HEADER_EVENT_TYPE;
1062 size = strlen(name);
1063 size = ALIGN(size, sizeof(u64));
1064 ev.event_type.header.size = sizeof(ev.event_type) -
1065 (sizeof(ev.event_type.event_type.name) - size);
1067 err = process(&ev, session);
1072 int event__synthesize_event_types(event__handler_t process,
1073 struct perf_session *session)
1075 struct perf_trace_event_type *type;
1078 for (i = 0; i < event_count; i++) {
1081 err = event__synthesize_event_type(type->event_id, type->name,
1084 pr_debug("failed to create perf header event type\n");
1092 int event__process_event_type(event_t *self,
1093 struct perf_session *session __unused)
1095 if (perf_header__push_event(self->event_type.event_type.event_id,
1096 self->event_type.event_type.name) < 0)
1102 int event__synthesize_tracing_data(int fd, struct perf_event_attr *pattrs,
1104 event__handler_t process,
1105 struct perf_session *session __unused)
1108 ssize_t size = 0, aligned_size = 0, padding;
1111 memset(&ev, 0, sizeof(ev));
1113 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
1114 size = read_tracing_data_size(fd, pattrs, nb_events);
1117 aligned_size = ALIGN(size, sizeof(u64));
1118 padding = aligned_size - size;
1119 ev.tracing_data.header.size = sizeof(ev.tracing_data);
1120 ev.tracing_data.size = aligned_size;
1122 process(&ev, session);
1124 err = read_tracing_data(fd, pattrs, nb_events);
1125 write_padded(fd, NULL, 0, padding);
1127 return aligned_size;
1130 int event__process_tracing_data(event_t *self,
1131 struct perf_session *session)
1133 ssize_t size_read, padding, size = self->tracing_data.size;
1134 off_t offset = lseek(session->fd, 0, SEEK_CUR);
1137 /* setup for reading amidst mmap */
1138 lseek(session->fd, offset + sizeof(struct tracing_data_event),
1141 size_read = trace_report(session->fd, session->repipe);
1143 padding = ALIGN(size_read, sizeof(u64)) - size_read;
1145 if (read(session->fd, buf, padding) < 0)
1146 die("reading input file");
1147 if (session->repipe) {
1148 int retw = write(STDOUT_FILENO, buf, padding);
1149 if (retw <= 0 || retw != padding)
1150 die("repiping tracing data padding");
1153 if (size_read + padding != size)
1154 die("tracing data size mismatch");
1156 return size_read + padding;
1159 int event__synthesize_build_id(struct dso *pos, u16 misc,
1160 event__handler_t process,
1161 struct machine *machine,
1162 struct perf_session *session)
1171 memset(&ev, 0, sizeof(ev));
1173 len = pos->long_name_len + 1;
1174 len = ALIGN(len, NAME_ALIGN);
1175 memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
1176 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
1177 ev.build_id.header.misc = misc;
1178 ev.build_id.pid = machine->pid;
1179 ev.build_id.header.size = sizeof(ev.build_id) + len;
1180 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
1182 err = process(&ev, session);
1187 int event__process_build_id(event_t *self,
1188 struct perf_session *session)
1190 __event_process_build_id(&self->build_id,
1191 self->build_id.filename,
1196 void disable_buildid_cache(void)
1198 no_buildid_cache = true;