1 #include <linux/types.h>
10 static const char *event__name[] = {
12 [PERF_RECORD_MMAP] = "MMAP",
13 [PERF_RECORD_LOST] = "LOST",
14 [PERF_RECORD_COMM] = "COMM",
15 [PERF_RECORD_EXIT] = "EXIT",
16 [PERF_RECORD_THROTTLE] = "THROTTLE",
17 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
18 [PERF_RECORD_FORK] = "FORK",
19 [PERF_RECORD_READ] = "READ",
20 [PERF_RECORD_SAMPLE] = "SAMPLE",
21 [PERF_RECORD_HEADER_ATTR] = "ATTR",
22 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
23 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
24 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
25 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
28 const char *event__get_event_name(unsigned int id)
30 if (id >= ARRAY_SIZE(event__name))
34 return event__name[id];
37 static struct sample_data synth_sample = {
46 static pid_t event__synthesize_comm(event_t *event, pid_t pid, int full,
47 event__handler_t process,
48 struct perf_session *session)
50 char filename[PATH_MAX];
55 struct dirent dirent, *next;
58 snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
60 fp = fopen(filename, "r");
64 * We raced with a task exiting - just return:
66 pr_debug("couldn't open %s\n", filename);
70 memset(&event->comm, 0, sizeof(event->comm));
72 while (!event->comm.comm[0] || !event->comm.pid) {
73 if (fgets(bf, sizeof(bf), fp) == NULL) {
74 pr_warning("couldn't get COMM and pgid, malformed %s\n", filename);
78 if (memcmp(bf, "Name:", 5) == 0) {
80 while (*name && isspace(*name))
82 size = strlen(name) - 1;
83 memcpy(event->comm.comm, name, size++);
84 } else if (memcmp(bf, "Tgid:", 5) == 0) {
86 while (*tgids && isspace(*tgids))
88 tgid = event->comm.pid = atoi(tgids);
92 event->comm.header.type = PERF_RECORD_COMM;
93 size = ALIGN(size, sizeof(u64));
94 memset(event->comm.comm + size, 0, session->id_hdr_size);
95 event->comm.header.size = (sizeof(event->comm) -
96 (sizeof(event->comm.comm) - size) +
97 session->id_hdr_size);
99 event->comm.tid = pid;
101 process(event, &synth_sample, session);
105 snprintf(filename, sizeof(filename), "/proc/%d/task", pid);
107 tasks = opendir(filename);
111 while (!readdir_r(tasks, &dirent, &next) && next) {
113 pid = strtol(dirent.d_name, &end, 10);
117 event->comm.tid = pid;
119 process(event, &synth_sample, session);
129 static int event__synthesize_mmap_events(event_t *event, pid_t pid, pid_t tgid,
130 event__handler_t process,
131 struct perf_session *session)
133 char filename[PATH_MAX];
136 snprintf(filename, sizeof(filename), "/proc/%d/maps", pid);
138 fp = fopen(filename, "r");
141 * We raced with a task exiting - just return:
143 pr_debug("couldn't open %s\n", filename);
147 event->header.type = PERF_RECORD_MMAP;
149 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
151 event->header.misc = PERF_RECORD_MISC_USER;
154 char bf[BUFSIZ], *pbf = bf;
157 if (fgets(bf, sizeof(bf), fp) == NULL)
160 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
161 n = hex2u64(pbf, &event->mmap.start);
165 n = hex2u64(pbf, &event->mmap.len);
169 if (*pbf == 'x') { /* vm_exec */
170 char *execname = strchr(bf, '/');
173 if (execname == NULL)
174 execname = strstr(bf, "[vdso]");
176 if (execname == NULL)
180 n = hex2u64(pbf, &event->mmap.pgoff);
182 size = strlen(execname);
183 execname[size - 1] = '\0'; /* Remove \n */
184 memcpy(event->mmap.filename, execname, size);
185 size = ALIGN(size, sizeof(u64));
186 event->mmap.len -= event->mmap.start;
187 event->mmap.header.size = (sizeof(event->mmap) -
188 (sizeof(event->mmap.filename) - size));
189 memset(event->mmap.filename + size, 0, session->id_hdr_size);
190 event->mmap.header.size += session->id_hdr_size;
191 event->mmap.pid = tgid;
192 event->mmap.tid = pid;
194 process(event, &synth_sample, session);
202 int event__synthesize_modules(event__handler_t process,
203 struct perf_session *session,
204 struct machine *machine)
207 struct map_groups *kmaps = &machine->kmaps;
208 event_t *event = zalloc(sizeof(event->mmap) + session->id_hdr_size);
211 pr_debug("Not enough memory synthesizing mmap event "
212 "for kernel modules\n");
216 event->header.type = PERF_RECORD_MMAP;
219 * kernel uses 0 for user space maps, see kernel/perf_event.c
222 if (machine__is_host(machine))
223 event->header.misc = PERF_RECORD_MISC_KERNEL;
225 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
227 for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
228 nd; nd = rb_next(nd)) {
230 struct map *pos = rb_entry(nd, struct map, rb_node);
232 if (pos->dso->kernel)
235 size = ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
236 event->mmap.header.type = PERF_RECORD_MMAP;
237 event->mmap.header.size = (sizeof(event->mmap) -
238 (sizeof(event->mmap.filename) - size));
239 memset(event->mmap.filename + size, 0, session->id_hdr_size);
240 event->mmap.header.size += session->id_hdr_size;
241 event->mmap.start = pos->start;
242 event->mmap.len = pos->end - pos->start;
243 event->mmap.pid = machine->pid;
245 memcpy(event->mmap.filename, pos->dso->long_name,
246 pos->dso->long_name_len + 1);
247 process(event, &synth_sample, session);
254 static int __event__synthesize_thread(event_t *comm_event, event_t *mmap_event,
255 pid_t pid, event__handler_t process,
256 struct perf_session *session)
258 pid_t tgid = event__synthesize_comm(comm_event, pid, 1, process,
262 return event__synthesize_mmap_events(mmap_event, pid, tgid,
266 int event__synthesize_thread(pid_t pid, event__handler_t process,
267 struct perf_session *session)
269 event_t *comm_event, *mmap_event;
272 comm_event = malloc(sizeof(comm_event->comm) + session->id_hdr_size);
273 if (comm_event == NULL)
276 mmap_event = malloc(sizeof(mmap_event->mmap) + session->id_hdr_size);
277 if (mmap_event == NULL)
280 err = __event__synthesize_thread(comm_event, mmap_event, pid,
289 int event__synthesize_threads(event__handler_t process,
290 struct perf_session *session)
293 struct dirent dirent, *next;
294 event_t *comm_event, *mmap_event;
297 comm_event = malloc(sizeof(comm_event->comm) + session->id_hdr_size);
298 if (comm_event == NULL)
301 mmap_event = malloc(sizeof(mmap_event->mmap) + session->id_hdr_size);
302 if (mmap_event == NULL)
305 proc = opendir("/proc");
309 while (!readdir_r(proc, &dirent, &next) && next) {
311 pid_t pid = strtol(dirent.d_name, &end, 10);
313 if (*end) /* only interested in proper numerical dirents */
316 __event__synthesize_thread(comm_event, mmap_event, pid,
330 struct process_symbol_args {
335 static int find_symbol_cb(void *arg, const char *name, char type,
336 u64 start, u64 end __used)
338 struct process_symbol_args *args = arg;
341 * Must be a function or at least an alias, as in PARISC64, where "_text" is
342 * an 'A' to the same address as "_stext".
344 if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
345 type == 'A') || strcmp(name, args->name))
352 int event__synthesize_kernel_mmap(event__handler_t process,
353 struct perf_session *session,
354 struct machine *machine,
355 const char *symbol_name)
358 const char *filename, *mmap_name;
360 char name_buff[PATH_MAX];
364 * We should get this from /sys/kernel/sections/.text, but till that is
365 * available use this, and after it is use this as a fallback for older
368 struct process_symbol_args args = { .name = symbol_name, };
369 event_t *event = zalloc(sizeof(event->mmap) + session->id_hdr_size);
372 pr_debug("Not enough memory synthesizing mmap event "
373 "for kernel modules\n");
377 mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
378 if (machine__is_host(machine)) {
380 * kernel uses PERF_RECORD_MISC_USER for user space maps,
381 * see kernel/perf_event.c __perf_event_mmap
383 event->header.misc = PERF_RECORD_MISC_KERNEL;
384 filename = "/proc/kallsyms";
386 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
387 if (machine__is_default_guest(machine))
388 filename = (char *) symbol_conf.default_guest_kallsyms;
390 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
395 if (kallsyms__parse(filename, &args, find_symbol_cb) <= 0)
398 map = machine->vmlinux_maps[MAP__FUNCTION];
399 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
400 "%s%s", mmap_name, symbol_name) + 1;
401 size = ALIGN(size, sizeof(u64));
402 event->mmap.header.type = PERF_RECORD_MMAP;
403 event->mmap.header.size = (sizeof(event->mmap) -
404 (sizeof(event->mmap.filename) - size) + session->id_hdr_size);
405 event->mmap.pgoff = args.start;
406 event->mmap.start = map->start;
407 event->mmap.len = map->end - event->mmap.start;
408 event->mmap.pid = machine->pid;
410 err = process(event, &synth_sample, session);
416 static void thread__comm_adjust(struct thread *self, struct hists *hists)
418 char *comm = self->comm;
420 if (!symbol_conf.col_width_list_str && !symbol_conf.field_sep &&
421 (!symbol_conf.comm_list ||
422 strlist__has_entry(symbol_conf.comm_list, comm))) {
423 u16 slen = strlen(comm);
425 if (hists__new_col_len(hists, HISTC_COMM, slen))
426 hists__set_col_len(hists, HISTC_THREAD, slen + 6);
430 static int thread__set_comm_adjust(struct thread *self, const char *comm,
433 int ret = thread__set_comm(self, comm);
438 thread__comm_adjust(self, hists);
443 int event__process_comm(event_t *self, struct sample_data *sample __used,
444 struct perf_session *session)
446 struct thread *thread = perf_session__findnew(session, self->comm.tid);
448 dump_printf(": %s:%d\n", self->comm.comm, self->comm.tid);
450 if (thread == NULL || thread__set_comm_adjust(thread, self->comm.comm,
452 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
459 int event__process_lost(event_t *self, struct sample_data *sample __used,
460 struct perf_session *session)
462 dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
463 self->lost.id, self->lost.lost);
464 session->hists.stats.total_lost += self->lost.lost;
468 static void event_set_kernel_mmap_len(struct map **maps, event_t *self)
470 maps[MAP__FUNCTION]->start = self->mmap.start;
471 maps[MAP__FUNCTION]->end = self->mmap.start + self->mmap.len;
473 * Be a bit paranoid here, some perf.data file came with
474 * a zero sized synthesized MMAP event for the kernel.
476 if (maps[MAP__FUNCTION]->end == 0)
477 maps[MAP__FUNCTION]->end = ~0ULL;
480 static int event__process_kernel_mmap(event_t *self,
481 struct perf_session *session)
484 char kmmap_prefix[PATH_MAX];
485 struct machine *machine;
486 enum dso_kernel_type kernel_type;
489 machine = perf_session__findnew_machine(session, self->mmap.pid);
491 pr_err("Can't find id %d's machine\n", self->mmap.pid);
495 machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
496 if (machine__is_host(machine))
497 kernel_type = DSO_TYPE_KERNEL;
499 kernel_type = DSO_TYPE_GUEST_KERNEL;
501 is_kernel_mmap = memcmp(self->mmap.filename,
503 strlen(kmmap_prefix)) == 0;
504 if (self->mmap.filename[0] == '/' ||
505 (!is_kernel_mmap && self->mmap.filename[0] == '[')) {
507 char short_module_name[1024];
510 if (self->mmap.filename[0] == '/') {
511 name = strrchr(self->mmap.filename, '/');
516 dot = strrchr(name, '.');
519 snprintf(short_module_name, sizeof(short_module_name),
520 "[%.*s]", (int)(dot - name), name);
521 strxfrchar(short_module_name, '-', '_');
523 strcpy(short_module_name, self->mmap.filename);
525 map = machine__new_module(machine, self->mmap.start,
526 self->mmap.filename);
530 name = strdup(short_module_name);
534 map->dso->short_name = name;
535 map->dso->sname_alloc = 1;
536 map->end = map->start + self->mmap.len;
537 } else if (is_kernel_mmap) {
538 const char *symbol_name = (self->mmap.filename +
539 strlen(kmmap_prefix));
541 * Should be there already, from the build-id table in
544 struct dso *kernel = __dsos__findnew(&machine->kernel_dsos,
549 kernel->kernel = kernel_type;
550 if (__machine__create_kernel_maps(machine, kernel) < 0)
553 event_set_kernel_mmap_len(machine->vmlinux_maps, self);
554 perf_session__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
557 if (machine__is_default_guest(machine)) {
559 * preload dso of guest kernel and modules
561 dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION],
570 int event__process_mmap(event_t *self, struct sample_data *sample __used,
571 struct perf_session *session)
573 struct machine *machine;
574 struct thread *thread;
576 u8 cpumode = self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
579 dump_printf(" %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %s\n",
580 self->mmap.pid, self->mmap.tid, self->mmap.start,
581 self->mmap.len, self->mmap.pgoff, self->mmap.filename);
583 if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
584 cpumode == PERF_RECORD_MISC_KERNEL) {
585 ret = event__process_kernel_mmap(self, session);
591 machine = perf_session__find_host_machine(session);
594 thread = perf_session__findnew(session, self->mmap.pid);
597 map = map__new(&machine->user_dsos, self->mmap.start,
598 self->mmap.len, self->mmap.pgoff,
599 self->mmap.pid, self->mmap.filename,
604 thread__insert_map(thread, map);
608 dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
612 int event__process_task(event_t *self, struct sample_data *sample __used,
613 struct perf_session *session)
615 struct thread *thread = perf_session__findnew(session, self->fork.tid);
616 struct thread *parent = perf_session__findnew(session, self->fork.ptid);
618 dump_printf("(%d:%d):(%d:%d)\n", self->fork.pid, self->fork.tid,
619 self->fork.ppid, self->fork.ptid);
621 if (self->header.type == PERF_RECORD_EXIT) {
622 perf_session__remove_thread(session, thread);
626 if (thread == NULL || parent == NULL ||
627 thread__fork(thread, parent) < 0) {
628 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
635 int event__process(event_t *event, struct sample_data *sample,
636 struct perf_session *session)
638 switch (event->header.type) {
639 case PERF_RECORD_COMM:
640 event__process_comm(event, sample, session);
642 case PERF_RECORD_MMAP:
643 event__process_mmap(event, sample, session);
645 case PERF_RECORD_FORK:
646 case PERF_RECORD_EXIT:
647 event__process_task(event, sample, session);
656 void thread__find_addr_map(struct thread *self,
657 struct perf_session *session, u8 cpumode,
658 enum map_type type, pid_t pid, u64 addr,
659 struct addr_location *al)
661 struct map_groups *mg = &self->mg;
662 struct machine *machine = NULL;
666 al->cpumode = cpumode;
667 al->filtered = false;
669 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
671 machine = perf_session__find_host_machine(session);
672 if (machine == NULL) {
676 mg = &machine->kmaps;
677 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
679 machine = perf_session__find_host_machine(session);
680 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
682 machine = perf_session__find_machine(session, pid);
683 if (machine == NULL) {
687 mg = &machine->kmaps;
690 * 'u' means guest os user space.
691 * TODO: We don't support guest user space. Might support late.
693 if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest)
699 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
700 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
703 if ((cpumode == PERF_RECORD_MISC_USER ||
704 cpumode == PERF_RECORD_MISC_KERNEL) &&
711 al->map = map_groups__find(mg, type, al->addr);
712 if (al->map == NULL) {
714 * If this is outside of all known maps, and is a negative
715 * address, try to look it up in the kernel dso, as it might be
716 * a vsyscall or vdso (which executes in user-mode).
718 * XXX This is nasty, we should have a symbol list in the
719 * "[vdso]" dso, but for now lets use the old trick of looking
720 * in the whole kernel symbol list.
722 if ((long long)al->addr < 0 &&
723 cpumode == PERF_RECORD_MISC_KERNEL &&
724 machine && mg != &machine->kmaps) {
725 mg = &machine->kmaps;
729 al->addr = al->map->map_ip(al->map, al->addr);
732 void thread__find_addr_location(struct thread *self,
733 struct perf_session *session, u8 cpumode,
734 enum map_type type, pid_t pid, u64 addr,
735 struct addr_location *al,
736 symbol_filter_t filter)
738 thread__find_addr_map(self, session, cpumode, type, pid, addr, al);
740 al->sym = map__find_symbol(al->map, al->addr, filter);
745 static void dso__calc_col_width(struct dso *self, struct hists *hists)
747 if (!symbol_conf.col_width_list_str && !symbol_conf.field_sep &&
748 (!symbol_conf.dso_list ||
749 strlist__has_entry(symbol_conf.dso_list, self->name))) {
750 u16 slen = dso__name_len(self);
751 hists__new_col_len(hists, HISTC_DSO, slen);
754 self->slen_calculated = 1;
757 int event__preprocess_sample(const event_t *self, struct perf_session *session,
758 struct addr_location *al, struct sample_data *data,
759 symbol_filter_t filter)
761 u8 cpumode = self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
762 struct thread *thread = perf_session__findnew(session, self->ip.pid);
767 if (symbol_conf.comm_list &&
768 !strlist__has_entry(symbol_conf.comm_list, thread->comm))
771 dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
773 * Have we already created the kernel maps for the host machine?
775 * This should have happened earlier, when we processed the kernel MMAP
776 * events, but for older perf.data files there was no such thing, so do
779 if (cpumode == PERF_RECORD_MISC_KERNEL &&
780 session->host_machine.vmlinux_maps[MAP__FUNCTION] == NULL)
781 machine__create_kernel_maps(&session->host_machine);
783 thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION,
784 self->ip.pid, self->ip.ip, al);
785 dump_printf(" ...... dso: %s\n",
786 al->map ? al->map->dso->long_name :
787 al->level == 'H' ? "[hypervisor]" : "<not found>");
792 if (symbol_conf.dso_list &&
793 (!al->map || !al->map->dso ||
794 !(strlist__has_entry(symbol_conf.dso_list,
795 al->map->dso->short_name) ||
796 (al->map->dso->short_name != al->map->dso->long_name &&
797 strlist__has_entry(symbol_conf.dso_list,
798 al->map->dso->long_name)))))
801 * We have to do this here as we may have a dso with no symbol
802 * hit that has a name longer than the ones with symbols
805 if (!sort_dso.elide && !al->map->dso->slen_calculated)
806 dso__calc_col_width(al->map->dso, &session->hists);
808 al->sym = map__find_symbol(al->map, al->addr, filter);
810 const unsigned int unresolved_col_width = BITS_PER_LONG / 4;
812 if (hists__col_len(&session->hists, HISTC_DSO) < unresolved_col_width &&
813 !symbol_conf.col_width_list_str && !symbol_conf.field_sep &&
814 !symbol_conf.dso_list)
815 hists__set_col_len(&session->hists, HISTC_DSO,
816 unresolved_col_width);
819 if (symbol_conf.sym_list && al->sym &&
820 !strlist__has_entry(symbol_conf.sym_list, al->sym->name))
830 static int event__parse_id_sample(const event_t *event,
831 struct perf_session *session,
832 struct sample_data *sample)
837 sample->cpu = sample->pid = sample->tid = -1;
838 sample->stream_id = sample->id = sample->time = -1ULL;
840 if (!session->sample_id_all)
843 array = event->sample.array;
844 array += ((event->header.size -
845 sizeof(event->header)) / sizeof(u64)) - 1;
846 type = session->sample_type;
848 if (type & PERF_SAMPLE_CPU) {
849 u32 *p = (u32 *)array;
854 if (type & PERF_SAMPLE_STREAM_ID) {
855 sample->stream_id = *array;
859 if (type & PERF_SAMPLE_ID) {
864 if (type & PERF_SAMPLE_TIME) {
865 sample->time = *array;
869 if (type & PERF_SAMPLE_TID) {
870 u32 *p = (u32 *)array;
878 int event__parse_sample(const event_t *event, struct perf_session *session,
879 struct sample_data *data)
884 if (event->header.type != PERF_RECORD_SAMPLE)
885 return event__parse_id_sample(event, session, data);
887 array = event->sample.array;
888 type = session->sample_type;
890 if (type & PERF_SAMPLE_IP) {
891 data->ip = event->ip.ip;
895 if (type & PERF_SAMPLE_TID) {
896 u32 *p = (u32 *)array;
902 if (type & PERF_SAMPLE_TIME) {
907 if (type & PERF_SAMPLE_ADDR) {
913 if (type & PERF_SAMPLE_ID) {
918 if (type & PERF_SAMPLE_STREAM_ID) {
919 data->stream_id = *array;
923 if (type & PERF_SAMPLE_CPU) {
924 u32 *p = (u32 *)array;
930 if (type & PERF_SAMPLE_PERIOD) {
931 data->period = *array;
935 if (type & PERF_SAMPLE_READ) {
936 pr_debug("PERF_SAMPLE_READ is unsuported for now\n");
940 if (type & PERF_SAMPLE_CALLCHAIN) {
941 data->callchain = (struct ip_callchain *)array;
942 array += 1 + data->callchain->nr;
945 if (type & PERF_SAMPLE_RAW) {
946 u32 *p = (u32 *)array;