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 *realname = realpath(name, NULL),
269 *filename = malloc(size),
270 *linkname = malloc(size), *targetname;
273 if (realname == NULL || filename == NULL || linkname == NULL)
276 len = snprintf(filename, size, "%s%s%s",
277 debugdir, is_kallsyms ? "/" : "", realname);
278 if (mkdir_p(filename, 0755))
281 snprintf(filename + len, sizeof(filename) - len, "/%s", sbuild_id);
283 if (access(filename, F_OK)) {
285 if (copyfile("/proc/kallsyms", filename))
287 } else if (link(realname, filename) && copyfile(name, filename))
291 len = snprintf(linkname, size, "%s/.build-id/%.2s",
292 debugdir, sbuild_id);
294 if (access(linkname, X_OK) && mkdir_p(linkname, 0755))
297 snprintf(linkname + len, size - len, "/%s", sbuild_id + 2);
298 targetname = filename + strlen(debugdir) - 5;
299 memcpy(targetname, "../..", 5);
301 if (symlink(targetname, linkname) == 0)
310 static int build_id_cache__add_b(const u8 *build_id, size_t build_id_size,
311 const char *name, const char *debugdir,
314 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
316 build_id__sprintf(build_id, build_id_size, sbuild_id);
318 return build_id_cache__add_s(sbuild_id, debugdir, name, is_kallsyms);
321 int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir)
323 const size_t size = PATH_MAX;
324 char *filename = malloc(size),
325 *linkname = malloc(size);
328 if (filename == NULL || linkname == NULL)
331 snprintf(linkname, size, "%s/.build-id/%.2s/%s",
332 debugdir, sbuild_id, sbuild_id + 2);
334 if (access(linkname, F_OK))
337 if (readlink(linkname, filename, size) < 0)
340 if (unlink(linkname))
344 * Since the link is relative, we must make it absolute:
346 snprintf(linkname, size, "%s/.build-id/%.2s/%s",
347 debugdir, sbuild_id, filename);
349 if (unlink(linkname))
359 static int dso__cache_build_id(struct dso *self, const char *debugdir)
361 bool is_kallsyms = self->kernel && self->long_name[0] != '/';
363 return build_id_cache__add_b(self->build_id, sizeof(self->build_id),
364 self->long_name, debugdir, is_kallsyms);
367 static int __dsos__cache_build_ids(struct list_head *head, const char *debugdir)
372 dsos__for_each_with_build_id(pos, head)
373 if (dso__cache_build_id(pos, debugdir))
379 static int machine__cache_build_ids(struct machine *self, const char *debugdir)
381 int ret = __dsos__cache_build_ids(&self->kernel_dsos, debugdir);
382 ret |= __dsos__cache_build_ids(&self->user_dsos, debugdir);
386 static int perf_session__cache_build_ids(struct perf_session *self)
390 char debugdir[PATH_MAX];
392 snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir);
394 if (mkdir(debugdir, 0755) != 0 && errno != EEXIST)
397 ret = machine__cache_build_ids(&self->host_machine, debugdir);
399 for (nd = rb_first(&self->machines); nd; nd = rb_next(nd)) {
400 struct machine *pos = rb_entry(nd, struct machine, rb_node);
401 ret |= machine__cache_build_ids(pos, debugdir);
406 static bool machine__read_build_ids(struct machine *self, bool with_hits)
408 bool ret = __dsos__read_build_ids(&self->kernel_dsos, with_hits);
409 ret |= __dsos__read_build_ids(&self->user_dsos, with_hits);
413 static bool perf_session__read_build_ids(struct perf_session *self, bool with_hits)
416 bool ret = machine__read_build_ids(&self->host_machine, with_hits);
418 for (nd = rb_first(&self->machines); nd; nd = rb_next(nd)) {
419 struct machine *pos = rb_entry(nd, struct machine, rb_node);
420 ret |= machine__read_build_ids(pos, with_hits);
426 static int perf_header__adds_write(struct perf_header *self, int fd)
429 struct perf_session *session;
430 struct perf_file_section *feat_sec;
435 session = container_of(self, struct perf_session, header);
436 if (perf_session__read_build_ids(session, true))
437 perf_header__set_feat(self, HEADER_BUILD_ID);
439 nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS);
443 feat_sec = calloc(sizeof(*feat_sec), nr_sections);
444 if (feat_sec == NULL)
447 sec_size = sizeof(*feat_sec) * nr_sections;
449 sec_start = self->data_offset + self->data_size;
450 lseek(fd, sec_start + sec_size, SEEK_SET);
452 if (perf_header__has_feat(self, HEADER_TRACE_INFO)) {
453 struct perf_file_section *trace_sec;
455 trace_sec = &feat_sec[idx++];
457 /* Write trace info */
458 trace_sec->offset = lseek(fd, 0, SEEK_CUR);
459 read_tracing_data(fd, attrs, nr_counters);
460 trace_sec->size = lseek(fd, 0, SEEK_CUR) - trace_sec->offset;
463 if (perf_header__has_feat(self, HEADER_BUILD_ID)) {
464 struct perf_file_section *buildid_sec;
466 buildid_sec = &feat_sec[idx++];
468 /* Write build-ids */
469 buildid_sec->offset = lseek(fd, 0, SEEK_CUR);
470 err = dsos__write_buildid_table(self, fd);
472 pr_debug("failed to write buildid table\n");
475 buildid_sec->size = lseek(fd, 0, SEEK_CUR) -
477 if (!no_buildid_cache)
478 perf_session__cache_build_ids(session);
481 lseek(fd, sec_start, SEEK_SET);
482 err = do_write(fd, feat_sec, sec_size);
484 pr_debug("failed to write feature section\n");
490 int perf_header__write_pipe(int fd)
492 struct perf_pipe_file_header f_header;
495 f_header = (struct perf_pipe_file_header){
497 .size = sizeof(f_header),
500 err = do_write(fd, &f_header, sizeof(f_header));
502 pr_debug("failed to write perf pipe header\n");
509 int perf_header__write(struct perf_header *self, int fd, bool at_exit)
511 struct perf_file_header f_header;
512 struct perf_file_attr f_attr;
513 struct perf_header_attr *attr;
516 lseek(fd, sizeof(f_header), SEEK_SET);
518 for (i = 0; i < self->attrs; i++) {
519 attr = self->attr[i];
521 attr->id_offset = lseek(fd, 0, SEEK_CUR);
522 err = do_write(fd, attr->id, attr->ids * sizeof(u64));
524 pr_debug("failed to write perf header\n");
530 self->attr_offset = lseek(fd, 0, SEEK_CUR);
532 for (i = 0; i < self->attrs; i++) {
533 attr = self->attr[i];
535 f_attr = (struct perf_file_attr){
538 .offset = attr->id_offset,
539 .size = attr->ids * sizeof(u64),
542 err = do_write(fd, &f_attr, sizeof(f_attr));
544 pr_debug("failed to write perf header attribute\n");
549 self->event_offset = lseek(fd, 0, SEEK_CUR);
550 self->event_size = event_count * sizeof(struct perf_trace_event_type);
552 err = do_write(fd, events, self->event_size);
554 pr_debug("failed to write perf header events\n");
559 self->data_offset = lseek(fd, 0, SEEK_CUR);
562 err = perf_header__adds_write(self, fd);
567 f_header = (struct perf_file_header){
569 .size = sizeof(f_header),
570 .attr_size = sizeof(f_attr),
572 .offset = self->attr_offset,
573 .size = self->attrs * sizeof(f_attr),
576 .offset = self->data_offset,
577 .size = self->data_size,
580 .offset = self->event_offset,
581 .size = self->event_size,
585 memcpy(&f_header.adds_features, &self->adds_features, sizeof(self->adds_features));
587 lseek(fd, 0, SEEK_SET);
588 err = do_write(fd, &f_header, sizeof(f_header));
590 pr_debug("failed to write perf header\n");
593 lseek(fd, self->data_offset + self->data_size, SEEK_SET);
599 static int perf_header__getbuffer64(struct perf_header *self,
600 int fd, void *buf, size_t size)
602 if (do_read(fd, buf, size) <= 0)
605 if (self->needs_swap)
606 mem_bswap_64(buf, size);
611 int perf_header__process_sections(struct perf_header *self, int fd,
612 int (*process)(struct perf_file_section *self,
613 struct perf_header *ph,
616 struct perf_file_section *feat_sec;
620 int err = -1, feat = 1;
622 nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS);
626 feat_sec = calloc(sizeof(*feat_sec), nr_sections);
630 sec_size = sizeof(*feat_sec) * nr_sections;
632 lseek(fd, self->data_offset + self->data_size, SEEK_SET);
634 if (perf_header__getbuffer64(self, fd, feat_sec, sec_size))
638 while (idx < nr_sections && feat < HEADER_LAST_FEATURE) {
639 if (perf_header__has_feat(self, feat)) {
640 struct perf_file_section *sec = &feat_sec[idx++];
642 err = process(sec, self, feat, fd);
653 int perf_file_header__read(struct perf_file_header *self,
654 struct perf_header *ph, int fd)
656 lseek(fd, 0, SEEK_SET);
658 if (do_read(fd, self, sizeof(*self)) <= 0 ||
659 memcmp(&self->magic, __perf_magic, sizeof(self->magic)))
662 if (self->attr_size != sizeof(struct perf_file_attr)) {
663 u64 attr_size = bswap_64(self->attr_size);
665 if (attr_size != sizeof(struct perf_file_attr))
668 mem_bswap_64(self, offsetof(struct perf_file_header,
670 ph->needs_swap = true;
673 if (self->size != sizeof(*self)) {
674 /* Support the previous format */
675 if (self->size == offsetof(typeof(*self), adds_features))
676 bitmap_zero(self->adds_features, HEADER_FEAT_BITS);
681 memcpy(&ph->adds_features, &self->adds_features,
682 sizeof(ph->adds_features));
684 * FIXME: hack that assumes that if we need swap the perf.data file
685 * may be coming from an arch with a different word-size, ergo different
686 * DEFINE_BITMAP format, investigate more later, but for now its mostly
687 * safe to assume that we have a build-id section. Trace files probably
688 * have several other issues in this realm anyway...
690 if (ph->needs_swap) {
691 memset(&ph->adds_features, 0, sizeof(ph->adds_features));
692 perf_header__set_feat(ph, HEADER_BUILD_ID);
695 ph->event_offset = self->event_types.offset;
696 ph->event_size = self->event_types.size;
697 ph->data_offset = self->data.offset;
698 ph->data_size = self->data.size;
702 static int __event_process_build_id(struct build_id_event *bev,
704 struct perf_session *session)
707 struct list_head *head;
708 struct machine *machine;
711 enum dso_kernel_type dso_type;
713 machine = perf_session__findnew_machine(session, bev->pid);
717 misc = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
720 case PERF_RECORD_MISC_KERNEL:
721 dso_type = DSO_TYPE_KERNEL;
722 head = &machine->kernel_dsos;
724 case PERF_RECORD_MISC_GUEST_KERNEL:
725 dso_type = DSO_TYPE_GUEST_KERNEL;
726 head = &machine->kernel_dsos;
728 case PERF_RECORD_MISC_USER:
729 case PERF_RECORD_MISC_GUEST_USER:
730 dso_type = DSO_TYPE_USER;
731 head = &machine->user_dsos;
737 dso = __dsos__findnew(head, filename);
739 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
741 dso__set_build_id(dso, &bev->build_id);
743 if (filename[0] == '[')
744 dso->kernel = dso_type;
746 build_id__sprintf(dso->build_id, sizeof(dso->build_id),
748 pr_debug("build id event received for %s: %s\n",
749 dso->long_name, sbuild_id);
757 static int perf_header__read_build_ids(struct perf_header *self,
758 int input, u64 offset, u64 size)
760 struct perf_session *session = container_of(self,
761 struct perf_session, header);
762 struct build_id_event bev;
763 char filename[PATH_MAX];
764 u64 limit = offset + size;
767 while (offset < limit) {
770 if (read(input, &bev, sizeof(bev)) != sizeof(bev))
773 if (self->needs_swap)
774 perf_event_header__bswap(&bev.header);
776 len = bev.header.size - sizeof(bev);
777 if (read(input, filename, len) != len)
780 __event_process_build_id(&bev, filename, session);
782 offset += bev.header.size;
789 static int perf_file_section__process(struct perf_file_section *self,
790 struct perf_header *ph,
793 if (lseek(fd, self->offset, SEEK_SET) == (off_t)-1) {
794 pr_debug("Failed to lseek to %Ld offset for feature %d, "
795 "continuing...\n", self->offset, feat);
800 case HEADER_TRACE_INFO:
801 trace_report(fd, false);
804 case HEADER_BUILD_ID:
805 if (perf_header__read_build_ids(ph, fd, self->offset, self->size))
806 pr_debug("Failed to read buildids, continuing...\n");
809 pr_debug("unknown feature %d, continuing...\n", feat);
815 static int perf_file_header__read_pipe(struct perf_pipe_file_header *self,
816 struct perf_header *ph, int fd,
819 if (do_read(fd, self, sizeof(*self)) <= 0 ||
820 memcmp(&self->magic, __perf_magic, sizeof(self->magic)))
823 if (repipe && do_write(STDOUT_FILENO, self, sizeof(*self)) < 0)
826 if (self->size != sizeof(*self)) {
827 u64 size = bswap_64(self->size);
829 if (size != sizeof(*self))
832 ph->needs_swap = true;
838 static int perf_header__read_pipe(struct perf_session *session, int fd)
840 struct perf_header *self = &session->header;
841 struct perf_pipe_file_header f_header;
843 if (perf_file_header__read_pipe(&f_header, self, fd,
844 session->repipe) < 0) {
845 pr_debug("incompatible file format\n");
854 int perf_header__read(struct perf_session *session, int fd)
856 struct perf_header *self = &session->header;
857 struct perf_file_header f_header;
858 struct perf_file_attr f_attr;
860 int nr_attrs, nr_ids, i, j;
862 if (session->fd_pipe)
863 return perf_header__read_pipe(session, fd);
865 if (perf_file_header__read(&f_header, self, fd) < 0) {
866 pr_debug("incompatible file format\n");
870 nr_attrs = f_header.attrs.size / sizeof(f_attr);
871 lseek(fd, f_header.attrs.offset, SEEK_SET);
873 for (i = 0; i < nr_attrs; i++) {
874 struct perf_header_attr *attr;
877 if (perf_header__getbuffer64(self, fd, &f_attr, sizeof(f_attr)))
880 tmp = lseek(fd, 0, SEEK_CUR);
882 attr = perf_header_attr__new(&f_attr.attr);
886 nr_ids = f_attr.ids.size / sizeof(u64);
887 lseek(fd, f_attr.ids.offset, SEEK_SET);
889 for (j = 0; j < nr_ids; j++) {
890 if (perf_header__getbuffer64(self, fd, &f_id, sizeof(f_id)))
893 if (perf_header_attr__add_id(attr, f_id) < 0) {
894 perf_header_attr__delete(attr);
898 if (perf_header__add_attr(self, attr) < 0) {
899 perf_header_attr__delete(attr);
903 lseek(fd, tmp, SEEK_SET);
906 if (f_header.event_types.size) {
907 lseek(fd, f_header.event_types.offset, SEEK_SET);
908 events = malloc(f_header.event_types.size);
911 if (perf_header__getbuffer64(self, fd, events,
912 f_header.event_types.size))
914 event_count = f_header.event_types.size / sizeof(struct perf_trace_event_type);
917 perf_header__process_sections(self, fd, perf_file_section__process);
919 lseek(fd, self->data_offset, SEEK_SET);
927 u64 perf_header__sample_type(struct perf_header *header)
932 for (i = 0; i < header->attrs; i++) {
933 struct perf_header_attr *attr = header->attr[i];
936 type = attr->attr.sample_type;
937 else if (type != attr->attr.sample_type)
938 die("non matching sample_type");
944 struct perf_event_attr *
945 perf_header__find_attr(u64 id, struct perf_header *header)
950 * We set id to -1 if the data file doesn't contain sample
951 * ids. This can happen when the data file contains one type
952 * of event and in that case, the header can still store the
953 * event attribute information. Check for this and avoid
954 * walking through the entire list of ids which may be large.
957 if (header->attrs > 0)
958 return &header->attr[0]->attr;
962 for (i = 0; i < header->attrs; i++) {
963 struct perf_header_attr *attr = header->attr[i];
966 for (j = 0; j < attr->ids; j++) {
967 if (attr->id[j] == id)
975 int event__synthesize_attr(struct perf_event_attr *attr, u16 ids, u64 *id,
976 event__handler_t process,
977 struct perf_session *session)
983 size = sizeof(struct perf_event_attr);
984 size = ALIGN(size, sizeof(u64));
985 size += sizeof(struct perf_event_header);
986 size += ids * sizeof(u64);
990 ev->attr.attr = *attr;
991 memcpy(ev->attr.id, id, ids * sizeof(u64));
993 ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
994 ev->attr.header.size = size;
996 err = process(ev, session);
1003 int event__synthesize_attrs(struct perf_header *self,
1004 event__handler_t process,
1005 struct perf_session *session)
1007 struct perf_header_attr *attr;
1010 for (i = 0; i < self->attrs; i++) {
1011 attr = self->attr[i];
1013 err = event__synthesize_attr(&attr->attr, attr->ids, attr->id,
1016 pr_debug("failed to create perf header attribute\n");
1024 int event__process_attr(event_t *self, struct perf_session *session)
1026 struct perf_header_attr *attr;
1027 unsigned int i, ids, n_ids;
1029 attr = perf_header_attr__new(&self->attr.attr);
1033 ids = self->header.size;
1034 ids -= (void *)&self->attr.id - (void *)self;
1035 n_ids = ids / sizeof(u64);
1037 for (i = 0; i < n_ids; i++) {
1038 if (perf_header_attr__add_id(attr, self->attr.id[i]) < 0) {
1039 perf_header_attr__delete(attr);
1044 if (perf_header__add_attr(&session->header, attr) < 0) {
1045 perf_header_attr__delete(attr);
1049 perf_session__update_sample_type(session);
1054 int event__synthesize_event_type(u64 event_id, char *name,
1055 event__handler_t process,
1056 struct perf_session *session)
1062 memset(&ev, 0, sizeof(ev));
1064 ev.event_type.event_type.event_id = event_id;
1065 memset(ev.event_type.event_type.name, 0, MAX_EVENT_NAME);
1066 strncpy(ev.event_type.event_type.name, name, MAX_EVENT_NAME - 1);
1068 ev.event_type.header.type = PERF_RECORD_HEADER_EVENT_TYPE;
1069 size = strlen(name);
1070 size = ALIGN(size, sizeof(u64));
1071 ev.event_type.header.size = sizeof(ev.event_type) -
1072 (sizeof(ev.event_type.event_type.name) - size);
1074 err = process(&ev, session);
1079 int event__synthesize_event_types(event__handler_t process,
1080 struct perf_session *session)
1082 struct perf_trace_event_type *type;
1085 for (i = 0; i < event_count; i++) {
1088 err = event__synthesize_event_type(type->event_id, type->name,
1091 pr_debug("failed to create perf header event type\n");
1099 int event__process_event_type(event_t *self,
1100 struct perf_session *session __unused)
1102 if (perf_header__push_event(self->event_type.event_type.event_id,
1103 self->event_type.event_type.name) < 0)
1109 int event__synthesize_tracing_data(int fd, struct perf_event_attr *pattrs,
1111 event__handler_t process,
1112 struct perf_session *session __unused)
1115 ssize_t size = 0, aligned_size = 0, padding;
1118 memset(&ev, 0, sizeof(ev));
1120 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
1121 size = read_tracing_data_size(fd, pattrs, nb_events);
1124 aligned_size = ALIGN(size, sizeof(u64));
1125 padding = aligned_size - size;
1126 ev.tracing_data.header.size = sizeof(ev.tracing_data);
1127 ev.tracing_data.size = aligned_size;
1129 process(&ev, session);
1131 err = read_tracing_data(fd, pattrs, nb_events);
1132 write_padded(fd, NULL, 0, padding);
1134 return aligned_size;
1137 int event__process_tracing_data(event_t *self,
1138 struct perf_session *session)
1140 ssize_t size_read, padding, size = self->tracing_data.size;
1141 off_t offset = lseek(session->fd, 0, SEEK_CUR);
1144 /* setup for reading amidst mmap */
1145 lseek(session->fd, offset + sizeof(struct tracing_data_event),
1148 size_read = trace_report(session->fd, session->repipe);
1150 padding = ALIGN(size_read, sizeof(u64)) - size_read;
1152 if (read(session->fd, buf, padding) < 0)
1153 die("reading input file");
1154 if (session->repipe) {
1155 int retw = write(STDOUT_FILENO, buf, padding);
1156 if (retw <= 0 || retw != padding)
1157 die("repiping tracing data padding");
1160 if (size_read + padding != size)
1161 die("tracing data size mismatch");
1163 return size_read + padding;
1166 int event__synthesize_build_id(struct dso *pos, u16 misc,
1167 event__handler_t process,
1168 struct machine *machine,
1169 struct perf_session *session)
1178 memset(&ev, 0, sizeof(ev));
1180 len = pos->long_name_len + 1;
1181 len = ALIGN(len, NAME_ALIGN);
1182 memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
1183 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
1184 ev.build_id.header.misc = misc;
1185 ev.build_id.pid = machine->pid;
1186 ev.build_id.header.size = sizeof(ev.build_id) + len;
1187 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
1189 err = process(&ev, session);
1194 int event__process_build_id(event_t *self,
1195 struct perf_session *session)
1197 __event_process_build_id(&self->build_id,
1198 self->build_id.filename,
1203 void disable_buildid_cache(void)
1205 no_buildid_cache = true;