1 #define _FILE_OFFSET_BITS 64
8 #include <linux/list.h>
9 #include <linux/kernel.h>
14 #include "trace-event.h"
20 * Create new perf.data header attribute:
22 struct perf_header_attr *perf_header_attr__new(struct perf_event_attr *attr)
24 struct perf_header_attr *self = malloc(sizeof(*self));
30 self->id = malloc(sizeof(u64));
31 if (self->id == NULL) {
40 void perf_header_attr__delete(struct perf_header_attr *self)
46 int perf_header_attr__add_id(struct perf_header_attr *self, u64 id)
51 if (self->ids > self->size) {
52 int nsize = self->size * 2;
53 u64 *nid = realloc(self->id, nsize * sizeof(u64));
65 int perf_header__init(struct perf_header *self)
68 self->attr = malloc(sizeof(void *));
69 return self->attr == NULL ? -ENOMEM : 0;
72 void perf_header__exit(struct perf_header *self)
75 for (i = 0; i < self->attrs; ++i)
76 perf_header_attr__delete(self->attr[i]);
80 int perf_header__add_attr(struct perf_header *self,
81 struct perf_header_attr *attr)
86 if (self->attrs == self->size) {
87 int nsize = self->size * 2;
88 struct perf_header_attr **nattr;
90 nattr = realloc(self->attr, nsize * sizeof(void *));
98 self->attr[self->attrs++] = attr;
102 static int event_count;
103 static struct perf_trace_event_type *events;
105 int perf_header__push_event(u64 id, const char *name)
107 if (strlen(name) > MAX_EVENT_NAME)
108 pr_warning("Event %s will be truncated\n", name);
111 events = malloc(sizeof(struct perf_trace_event_type));
115 struct perf_trace_event_type *nevents;
117 nevents = realloc(events, (event_count + 1) * sizeof(*events));
122 memset(&events[event_count], 0, sizeof(struct perf_trace_event_type));
123 events[event_count].event_id = id;
124 strncpy(events[event_count].name, name, MAX_EVENT_NAME - 1);
129 char *perf_header__find_event(u64 id)
132 for (i = 0 ; i < event_count; i++) {
133 if (events[i].event_id == id)
134 return events[i].name;
139 static const char *__perf_magic = "PERFFILE";
141 #define PERF_MAGIC (*(u64 *)__perf_magic)
143 struct perf_file_attr {
144 struct perf_event_attr attr;
145 struct perf_file_section ids;
148 void perf_header__set_feat(struct perf_header *self, int feat)
150 set_bit(feat, self->adds_features);
153 bool perf_header__has_feat(const struct perf_header *self, int feat)
155 return test_bit(feat, self->adds_features);
158 static int do_write(int fd, const void *buf, size_t size)
161 int ret = write(fd, buf, size);
173 #define NAME_ALIGN 64
175 static int write_padded(int fd, const void *bf, size_t count,
176 size_t count_aligned)
178 static const char zero_buf[NAME_ALIGN];
179 int err = do_write(fd, bf, count);
182 err = do_write(fd, zero_buf, count_aligned - count);
187 #define dsos__for_each_with_build_id(pos, head) \
188 list_for_each_entry(pos, head, node) \
189 if (!pos->has_build_id) \
193 static int __dsos__write_buildid_table(struct list_head *head, pid_t pid,
198 dsos__for_each_with_build_id(pos, head) {
200 struct build_id_event b;
205 len = pos->long_name_len + 1;
206 len = ALIGN(len, NAME_ALIGN);
207 memset(&b, 0, sizeof(b));
208 memcpy(&b.build_id, pos->build_id, sizeof(pos->build_id));
210 b.header.misc = misc;
211 b.header.size = sizeof(b) + len;
212 err = do_write(fd, &b, sizeof(b));
215 err = write_padded(fd, pos->long_name,
216 pos->long_name_len + 1, len);
224 static int dsos__write_buildid_table(struct perf_header *header, int fd)
226 struct perf_session *session = container_of(header,
227 struct perf_session, header);
232 for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
233 struct machine *pos = rb_entry(nd, struct machine, rb_node);
234 if (machine__is_host(pos)) {
235 kmisc = PERF_RECORD_MISC_KERNEL;
236 umisc = PERF_RECORD_MISC_USER;
238 kmisc = PERF_RECORD_MISC_GUEST_KERNEL;
239 umisc = PERF_RECORD_MISC_GUEST_USER;
242 err = __dsos__write_buildid_table(&pos->kernel_dsos, pos->pid,
245 err = __dsos__write_buildid_table(&pos->user_dsos,
246 pos->pid, umisc, fd);
253 int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
254 const char *name, bool is_kallsyms)
256 const size_t size = PATH_MAX;
257 char *filename = malloc(size),
258 *linkname = malloc(size), *targetname;
261 if (filename == NULL || linkname == NULL)
264 len = snprintf(filename, size, "%s%s%s",
265 debugdir, is_kallsyms ? "/" : "", name);
266 if (mkdir_p(filename, 0755))
269 snprintf(filename + len, sizeof(filename) - len, "/%s", sbuild_id);
271 if (access(filename, F_OK)) {
273 if (copyfile("/proc/kallsyms", filename))
275 } else if (link(name, filename) && copyfile(name, filename))
279 len = snprintf(linkname, size, "%s/.build-id/%.2s",
280 debugdir, sbuild_id);
282 if (access(linkname, X_OK) && mkdir_p(linkname, 0755))
285 snprintf(linkname + len, size - len, "/%s", sbuild_id + 2);
286 targetname = filename + strlen(debugdir) - 5;
287 memcpy(targetname, "../..", 5);
289 if (symlink(targetname, linkname) == 0)
297 static int build_id_cache__add_b(const u8 *build_id, size_t build_id_size,
298 const char *name, const char *debugdir,
301 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
303 build_id__sprintf(build_id, build_id_size, sbuild_id);
305 return build_id_cache__add_s(sbuild_id, debugdir, name, is_kallsyms);
308 int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir)
310 const size_t size = PATH_MAX;
311 char *filename = malloc(size),
312 *linkname = malloc(size);
315 if (filename == NULL || linkname == NULL)
318 snprintf(linkname, size, "%s/.build-id/%.2s/%s",
319 debugdir, sbuild_id, sbuild_id + 2);
321 if (access(linkname, F_OK))
324 if (readlink(linkname, filename, size) < 0)
327 if (unlink(linkname))
331 * Since the link is relative, we must make it absolute:
333 snprintf(linkname, size, "%s/.build-id/%.2s/%s",
334 debugdir, sbuild_id, filename);
336 if (unlink(linkname))
346 static int dso__cache_build_id(struct dso *self, const char *debugdir)
348 bool is_kallsyms = self->kernel && self->long_name[0] != '/';
350 return build_id_cache__add_b(self->build_id, sizeof(self->build_id),
351 self->long_name, debugdir, is_kallsyms);
354 static int __dsos__cache_build_ids(struct list_head *head, const char *debugdir)
359 dsos__for_each_with_build_id(pos, head)
360 if (dso__cache_build_id(pos, debugdir))
366 static int dsos__cache_build_ids(struct perf_header *self)
368 struct perf_session *session = container_of(self,
369 struct perf_session, header);
372 char debugdir[PATH_MAX];
374 snprintf(debugdir, sizeof(debugdir), "%s/%s", getenv("HOME"),
377 if (mkdir(debugdir, 0755) != 0 && errno != EEXIST)
380 for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
381 struct machine *pos = rb_entry(nd, struct machine, rb_node);
382 ret |= __dsos__cache_build_ids(&pos->kernel_dsos, debugdir);
383 ret |= __dsos__cache_build_ids(&pos->user_dsos, debugdir);
388 static bool dsos__read_build_ids(struct perf_header *self, bool with_hits)
391 struct perf_session *session = container_of(self,
392 struct perf_session, header);
395 for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
396 struct machine *pos = rb_entry(nd, struct machine, rb_node);
397 ret |= __dsos__read_build_ids(&pos->kernel_dsos, with_hits);
398 ret |= __dsos__read_build_ids(&pos->user_dsos, with_hits);
404 static int perf_header__adds_write(struct perf_header *self, int fd)
407 struct perf_file_section *feat_sec;
412 if (dsos__read_build_ids(self, true))
413 perf_header__set_feat(self, HEADER_BUILD_ID);
415 nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS);
419 feat_sec = calloc(sizeof(*feat_sec), nr_sections);
420 if (feat_sec == NULL)
423 sec_size = sizeof(*feat_sec) * nr_sections;
425 sec_start = self->data_offset + self->data_size;
426 lseek(fd, sec_start + sec_size, SEEK_SET);
428 if (perf_header__has_feat(self, HEADER_TRACE_INFO)) {
429 struct perf_file_section *trace_sec;
431 trace_sec = &feat_sec[idx++];
433 /* Write trace info */
434 trace_sec->offset = lseek(fd, 0, SEEK_CUR);
435 read_tracing_data(fd, attrs, nr_counters);
436 trace_sec->size = lseek(fd, 0, SEEK_CUR) - trace_sec->offset;
439 if (perf_header__has_feat(self, HEADER_BUILD_ID)) {
440 struct perf_file_section *buildid_sec;
442 buildid_sec = &feat_sec[idx++];
444 /* Write build-ids */
445 buildid_sec->offset = lseek(fd, 0, SEEK_CUR);
446 err = dsos__write_buildid_table(self, fd);
448 pr_debug("failed to write buildid table\n");
451 buildid_sec->size = lseek(fd, 0, SEEK_CUR) -
453 dsos__cache_build_ids(self);
456 lseek(fd, sec_start, SEEK_SET);
457 err = do_write(fd, feat_sec, sec_size);
459 pr_debug("failed to write feature section\n");
465 int perf_header__write_pipe(int fd)
467 struct perf_pipe_file_header f_header;
470 f_header = (struct perf_pipe_file_header){
472 .size = sizeof(f_header),
475 err = do_write(fd, &f_header, sizeof(f_header));
477 pr_debug("failed to write perf pipe header\n");
484 int perf_header__write(struct perf_header *self, int fd, bool at_exit)
486 struct perf_file_header f_header;
487 struct perf_file_attr f_attr;
488 struct perf_header_attr *attr;
491 lseek(fd, sizeof(f_header), SEEK_SET);
494 for (i = 0; i < self->attrs; i++) {
495 attr = self->attr[i];
497 attr->id_offset = lseek(fd, 0, SEEK_CUR);
498 err = do_write(fd, attr->id, attr->ids * sizeof(u64));
500 pr_debug("failed to write perf header\n");
506 self->attr_offset = lseek(fd, 0, SEEK_CUR);
508 for (i = 0; i < self->attrs; i++) {
509 attr = self->attr[i];
511 f_attr = (struct perf_file_attr){
514 .offset = attr->id_offset,
515 .size = attr->ids * sizeof(u64),
518 err = do_write(fd, &f_attr, sizeof(f_attr));
520 pr_debug("failed to write perf header attribute\n");
525 self->event_offset = lseek(fd, 0, SEEK_CUR);
526 self->event_size = event_count * sizeof(struct perf_trace_event_type);
528 err = do_write(fd, events, self->event_size);
530 pr_debug("failed to write perf header events\n");
535 self->data_offset = lseek(fd, 0, SEEK_CUR);
538 err = perf_header__adds_write(self, fd);
543 f_header = (struct perf_file_header){
545 .size = sizeof(f_header),
546 .attr_size = sizeof(f_attr),
548 .offset = self->attr_offset,
549 .size = self->attrs * sizeof(f_attr),
552 .offset = self->data_offset,
553 .size = self->data_size,
556 .offset = self->event_offset,
557 .size = self->event_size,
561 memcpy(&f_header.adds_features, &self->adds_features, sizeof(self->adds_features));
563 lseek(fd, 0, SEEK_SET);
564 err = do_write(fd, &f_header, sizeof(f_header));
566 pr_debug("failed to write perf header\n");
569 lseek(fd, self->data_offset + self->data_size, SEEK_SET);
575 static int perf_header__getbuffer64(struct perf_header *self,
576 int fd, void *buf, size_t size)
578 if (do_read(fd, buf, size) <= 0)
581 if (self->needs_swap)
582 mem_bswap_64(buf, size);
587 int perf_header__process_sections(struct perf_header *self, int fd,
588 int (*process)(struct perf_file_section *self,
589 struct perf_header *ph,
592 struct perf_file_section *feat_sec;
596 int err = -1, feat = 1;
598 nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS);
602 feat_sec = calloc(sizeof(*feat_sec), nr_sections);
606 sec_size = sizeof(*feat_sec) * nr_sections;
608 lseek(fd, self->data_offset + self->data_size, SEEK_SET);
610 if (perf_header__getbuffer64(self, fd, feat_sec, sec_size))
614 while (idx < nr_sections && feat < HEADER_LAST_FEATURE) {
615 if (perf_header__has_feat(self, feat)) {
616 struct perf_file_section *sec = &feat_sec[idx++];
618 err = process(sec, self, feat, fd);
629 int perf_file_header__read(struct perf_file_header *self,
630 struct perf_header *ph, int fd)
632 lseek(fd, 0, SEEK_SET);
634 if (do_read(fd, self, sizeof(*self)) <= 0 ||
635 memcmp(&self->magic, __perf_magic, sizeof(self->magic)))
638 if (self->attr_size != sizeof(struct perf_file_attr)) {
639 u64 attr_size = bswap_64(self->attr_size);
641 if (attr_size != sizeof(struct perf_file_attr))
644 mem_bswap_64(self, offsetof(struct perf_file_header,
646 ph->needs_swap = true;
649 if (self->size != sizeof(*self)) {
650 /* Support the previous format */
651 if (self->size == offsetof(typeof(*self), adds_features))
652 bitmap_zero(self->adds_features, HEADER_FEAT_BITS);
657 memcpy(&ph->adds_features, &self->adds_features,
658 sizeof(ph->adds_features));
660 * FIXME: hack that assumes that if we need swap the perf.data file
661 * may be coming from an arch with a different word-size, ergo different
662 * DEFINE_BITMAP format, investigate more later, but for now its mostly
663 * safe to assume that we have a build-id section. Trace files probably
664 * have several other issues in this realm anyway...
666 if (ph->needs_swap) {
667 memset(&ph->adds_features, 0, sizeof(ph->adds_features));
668 perf_header__set_feat(ph, HEADER_BUILD_ID);
671 ph->event_offset = self->event_types.offset;
672 ph->event_size = self->event_types.size;
673 ph->data_offset = self->data.offset;
674 ph->data_size = self->data.size;
678 static int __event_process_build_id(struct build_id_event *bev,
680 struct perf_session *session)
683 struct list_head *head;
684 struct machine *machine;
687 enum dso_kernel_type dso_type;
689 machine = perf_session__findnew_machine(session, bev->pid);
693 misc = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
696 case PERF_RECORD_MISC_KERNEL:
697 dso_type = DSO_TYPE_KERNEL;
698 head = &machine->kernel_dsos;
700 case PERF_RECORD_MISC_GUEST_KERNEL:
701 dso_type = DSO_TYPE_GUEST_KERNEL;
702 head = &machine->kernel_dsos;
704 case PERF_RECORD_MISC_USER:
705 case PERF_RECORD_MISC_GUEST_USER:
706 dso_type = DSO_TYPE_USER;
707 head = &machine->user_dsos;
713 dso = __dsos__findnew(head, filename);
715 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
717 dso__set_build_id(dso, &bev->build_id);
719 if (filename[0] == '[')
720 dso->kernel = dso_type;
722 build_id__sprintf(dso->build_id, sizeof(dso->build_id),
724 pr_debug("build id event received for %s: %s\n",
725 dso->long_name, sbuild_id);
733 static int perf_header__read_build_ids(struct perf_header *self,
734 int input, u64 offset, u64 size)
736 struct perf_session *session = container_of(self,
737 struct perf_session, header);
738 struct build_id_event bev;
739 char filename[PATH_MAX];
740 u64 limit = offset + size;
743 while (offset < limit) {
746 if (read(input, &bev, sizeof(bev)) != sizeof(bev))
749 if (self->needs_swap)
750 perf_event_header__bswap(&bev.header);
752 len = bev.header.size - sizeof(bev);
753 if (read(input, filename, len) != len)
756 __event_process_build_id(&bev, filename, session);
758 offset += bev.header.size;
765 static int perf_file_section__process(struct perf_file_section *self,
766 struct perf_header *ph,
769 if (lseek(fd, self->offset, SEEK_SET) == (off_t)-1) {
770 pr_debug("Failed to lseek to %Ld offset for feature %d, "
771 "continuing...\n", self->offset, feat);
776 case HEADER_TRACE_INFO:
777 trace_report(fd, false);
780 case HEADER_BUILD_ID:
781 if (perf_header__read_build_ids(ph, fd, self->offset, self->size))
782 pr_debug("Failed to read buildids, continuing...\n");
785 pr_debug("unknown feature %d, continuing...\n", feat);
791 static int perf_file_header__read_pipe(struct perf_pipe_file_header *self,
792 struct perf_header *ph, int fd,
795 if (do_read(fd, self, sizeof(*self)) <= 0 ||
796 memcmp(&self->magic, __perf_magic, sizeof(self->magic)))
799 if (repipe && do_write(STDOUT_FILENO, self, sizeof(*self)) < 0)
802 if (self->size != sizeof(*self)) {
803 u64 size = bswap_64(self->size);
805 if (size != sizeof(*self))
808 ph->needs_swap = true;
814 static int perf_header__read_pipe(struct perf_session *session, int fd)
816 struct perf_header *self = &session->header;
817 struct perf_pipe_file_header f_header;
819 if (perf_file_header__read_pipe(&f_header, self, fd,
820 session->repipe) < 0) {
821 pr_debug("incompatible file format\n");
830 int perf_header__read(struct perf_session *session, int fd)
832 struct perf_header *self = &session->header;
833 struct perf_file_header f_header;
834 struct perf_file_attr f_attr;
836 int nr_attrs, nr_ids, i, j;
838 if (session->fd_pipe)
839 return perf_header__read_pipe(session, fd);
841 if (perf_file_header__read(&f_header, self, fd) < 0) {
842 pr_debug("incompatible file format\n");
846 nr_attrs = f_header.attrs.size / sizeof(f_attr);
847 lseek(fd, f_header.attrs.offset, SEEK_SET);
849 for (i = 0; i < nr_attrs; i++) {
850 struct perf_header_attr *attr;
853 if (perf_header__getbuffer64(self, fd, &f_attr, sizeof(f_attr)))
856 tmp = lseek(fd, 0, SEEK_CUR);
858 attr = perf_header_attr__new(&f_attr.attr);
862 nr_ids = f_attr.ids.size / sizeof(u64);
863 lseek(fd, f_attr.ids.offset, SEEK_SET);
865 for (j = 0; j < nr_ids; j++) {
866 if (perf_header__getbuffer64(self, fd, &f_id, sizeof(f_id)))
869 if (perf_header_attr__add_id(attr, f_id) < 0) {
870 perf_header_attr__delete(attr);
874 if (perf_header__add_attr(self, attr) < 0) {
875 perf_header_attr__delete(attr);
879 lseek(fd, tmp, SEEK_SET);
882 if (f_header.event_types.size) {
883 lseek(fd, f_header.event_types.offset, SEEK_SET);
884 events = malloc(f_header.event_types.size);
887 if (perf_header__getbuffer64(self, fd, events,
888 f_header.event_types.size))
890 event_count = f_header.event_types.size / sizeof(struct perf_trace_event_type);
893 perf_header__process_sections(self, fd, perf_file_section__process);
895 lseek(fd, self->data_offset, SEEK_SET);
903 u64 perf_header__sample_type(struct perf_header *header)
908 for (i = 0; i < header->attrs; i++) {
909 struct perf_header_attr *attr = header->attr[i];
912 type = attr->attr.sample_type;
913 else if (type != attr->attr.sample_type)
914 die("non matching sample_type");
920 struct perf_event_attr *
921 perf_header__find_attr(u64 id, struct perf_header *header)
926 * We set id to -1 if the data file doesn't contain sample
927 * ids. Check for this and avoid walking through the entire
928 * list of ids which may be large.
933 for (i = 0; i < header->attrs; i++) {
934 struct perf_header_attr *attr = header->attr[i];
937 for (j = 0; j < attr->ids; j++) {
938 if (attr->id[j] == id)
946 int event__synthesize_attr(struct perf_event_attr *attr, u16 ids, u64 *id,
947 event__handler_t process,
948 struct perf_session *session)
954 size = sizeof(struct perf_event_attr);
955 size = ALIGN(size, sizeof(u64));
956 size += sizeof(struct perf_event_header);
957 size += ids * sizeof(u64);
961 ev->attr.attr = *attr;
962 memcpy(ev->attr.id, id, ids * sizeof(u64));
964 ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
965 ev->attr.header.size = size;
967 err = process(ev, session);
974 int event__synthesize_attrs(struct perf_header *self,
975 event__handler_t process,
976 struct perf_session *session)
978 struct perf_header_attr *attr;
981 for (i = 0; i < self->attrs; i++) {
982 attr = self->attr[i];
984 err = event__synthesize_attr(&attr->attr, attr->ids, attr->id,
987 pr_debug("failed to create perf header attribute\n");
995 int event__process_attr(event_t *self, struct perf_session *session)
997 struct perf_header_attr *attr;
998 unsigned int i, ids, n_ids;
1000 attr = perf_header_attr__new(&self->attr.attr);
1004 ids = self->header.size;
1005 ids -= (void *)&self->attr.id - (void *)self;
1006 n_ids = ids / sizeof(u64);
1008 for (i = 0; i < n_ids; i++) {
1009 if (perf_header_attr__add_id(attr, self->attr.id[i]) < 0) {
1010 perf_header_attr__delete(attr);
1015 if (perf_header__add_attr(&session->header, attr) < 0) {
1016 perf_header_attr__delete(attr);
1020 perf_session__update_sample_type(session);
1025 int event__synthesize_event_type(u64 event_id, char *name,
1026 event__handler_t process,
1027 struct perf_session *session)
1033 memset(&ev, 0, sizeof(ev));
1035 ev.event_type.event_type.event_id = event_id;
1036 memset(ev.event_type.event_type.name, 0, MAX_EVENT_NAME);
1037 strncpy(ev.event_type.event_type.name, name, MAX_EVENT_NAME - 1);
1039 ev.event_type.header.type = PERF_RECORD_HEADER_EVENT_TYPE;
1040 size = strlen(name);
1041 size = ALIGN(size, sizeof(u64));
1042 ev.event_type.header.size = sizeof(ev.event_type) -
1043 (sizeof(ev.event_type.event_type.name) - size);
1045 err = process(&ev, session);
1050 int event__synthesize_event_types(event__handler_t process,
1051 struct perf_session *session)
1053 struct perf_trace_event_type *type;
1056 for (i = 0; i < event_count; i++) {
1059 err = event__synthesize_event_type(type->event_id, type->name,
1062 pr_debug("failed to create perf header event type\n");
1070 int event__process_event_type(event_t *self,
1071 struct perf_session *session __unused)
1073 if (perf_header__push_event(self->event_type.event_type.event_id,
1074 self->event_type.event_type.name) < 0)
1080 int event__synthesize_tracing_data(int fd, struct perf_event_attr *pattrs,
1082 event__handler_t process,
1083 struct perf_session *session __unused)
1086 ssize_t size = 0, aligned_size = 0, padding;
1089 memset(&ev, 0, sizeof(ev));
1091 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
1092 size = read_tracing_data_size(fd, pattrs, nb_events);
1095 aligned_size = ALIGN(size, sizeof(u64));
1096 padding = aligned_size - size;
1097 ev.tracing_data.header.size = sizeof(ev.tracing_data);
1098 ev.tracing_data.size = aligned_size;
1100 process(&ev, session);
1102 err = read_tracing_data(fd, pattrs, nb_events);
1103 write_padded(fd, NULL, 0, padding);
1105 return aligned_size;
1108 int event__process_tracing_data(event_t *self,
1109 struct perf_session *session)
1111 ssize_t size_read, padding, size = self->tracing_data.size;
1112 off_t offset = lseek(session->fd, 0, SEEK_CUR);
1115 /* setup for reading amidst mmap */
1116 lseek(session->fd, offset + sizeof(struct tracing_data_event),
1119 size_read = trace_report(session->fd, session->repipe);
1121 padding = ALIGN(size_read, sizeof(u64)) - size_read;
1123 if (read(session->fd, buf, padding) < 0)
1124 die("reading input file");
1125 if (session->repipe) {
1126 int retw = write(STDOUT_FILENO, buf, padding);
1127 if (retw <= 0 || retw != padding)
1128 die("repiping tracing data padding");
1131 if (size_read + padding != size)
1132 die("tracing data size mismatch");
1134 return size_read + padding;
1137 int event__synthesize_build_id(struct dso *pos, u16 misc,
1138 event__handler_t process,
1139 struct machine *machine,
1140 struct perf_session *session)
1149 memset(&ev, 0, sizeof(ev));
1151 len = pos->long_name_len + 1;
1152 len = ALIGN(len, NAME_ALIGN);
1153 memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
1154 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
1155 ev.build_id.header.misc = misc;
1156 ev.build_id.pid = machine->pid;
1157 ev.build_id.header.size = sizeof(ev.build_id) + len;
1158 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
1160 err = process(&ev, session);
1165 int event__process_build_id(event_t *self,
1166 struct perf_session *session)
1168 __event_process_build_id(&self->build_id,
1169 self->build_id.filename,