1 #include <linux/types.h>
9 #include "thread_map.h"
11 static const char *perf_event__names[] = {
13 [PERF_RECORD_MMAP] = "MMAP",
14 [PERF_RECORD_MMAP2] = "MMAP2",
15 [PERF_RECORD_LOST] = "LOST",
16 [PERF_RECORD_COMM] = "COMM",
17 [PERF_RECORD_EXIT] = "EXIT",
18 [PERF_RECORD_THROTTLE] = "THROTTLE",
19 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
20 [PERF_RECORD_FORK] = "FORK",
21 [PERF_RECORD_READ] = "READ",
22 [PERF_RECORD_SAMPLE] = "SAMPLE",
23 [PERF_RECORD_HEADER_ATTR] = "ATTR",
24 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
25 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
26 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
27 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
30 const char *perf_event__name(unsigned int id)
32 if (id >= ARRAY_SIZE(perf_event__names))
34 if (!perf_event__names[id])
36 return perf_event__names[id];
39 static struct perf_sample synth_sample = {
48 static pid_t perf_event__get_comm_tgid(pid_t pid, char *comm, size_t len)
50 char filename[PATH_MAX];
56 snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
58 fp = fopen(filename, "r");
60 pr_debug("couldn't open %s\n", filename);
64 while (!comm[0] || (tgid < 0)) {
65 if (fgets(bf, sizeof(bf), fp) == NULL) {
66 pr_warning("couldn't get COMM and pgid, malformed %s\n",
71 if (memcmp(bf, "Name:", 5) == 0) {
73 while (*name && isspace(*name))
75 size = strlen(name) - 1;
78 memcpy(comm, name, size);
81 } else if (memcmp(bf, "Tgid:", 5) == 0) {
83 while (*tgids && isspace(*tgids))
94 static pid_t perf_event__synthesize_comm(struct perf_tool *tool,
95 union perf_event *event, pid_t pid,
97 perf_event__handler_t process,
98 struct machine *machine)
100 char filename[PATH_MAX];
103 struct dirent dirent, *next;
106 memset(&event->comm, 0, sizeof(event->comm));
108 tgid = perf_event__get_comm_tgid(pid, event->comm.comm,
109 sizeof(event->comm.comm));
113 event->comm.pid = tgid;
114 event->comm.header.type = PERF_RECORD_COMM;
116 size = strlen(event->comm.comm) + 1;
117 size = PERF_ALIGN(size, sizeof(u64));
118 memset(event->comm.comm + size, 0, machine->id_hdr_size);
119 event->comm.header.size = (sizeof(event->comm) -
120 (sizeof(event->comm.comm) - size) +
121 machine->id_hdr_size);
123 event->comm.tid = pid;
125 if (process(tool, event, &synth_sample, machine) != 0)
131 snprintf(filename, sizeof(filename), "/proc/%d/task", pid);
133 tasks = opendir(filename);
135 pr_debug("couldn't open %s\n", filename);
139 while (!readdir_r(tasks, &dirent, &next) && next) {
141 pid = strtol(dirent.d_name, &end, 10);
145 /* already have tgid; jut want to update the comm */
146 (void) perf_event__get_comm_tgid(pid, event->comm.comm,
147 sizeof(event->comm.comm));
149 size = strlen(event->comm.comm) + 1;
150 size = PERF_ALIGN(size, sizeof(u64));
151 memset(event->comm.comm + size, 0, machine->id_hdr_size);
152 event->comm.header.size = (sizeof(event->comm) -
153 (sizeof(event->comm.comm) - size) +
154 machine->id_hdr_size);
156 event->comm.tid = pid;
158 if (process(tool, event, &synth_sample, machine) != 0) {
169 static int perf_event__synthesize_mmap_events(struct perf_tool *tool,
170 union perf_event *event,
171 pid_t pid, pid_t tgid,
172 perf_event__handler_t process,
173 struct machine *machine)
175 char filename[PATH_MAX];
179 snprintf(filename, sizeof(filename), "/proc/%d/maps", pid);
181 fp = fopen(filename, "r");
184 * We raced with a task exiting - just return:
186 pr_debug("couldn't open %s\n", filename);
190 event->header.type = PERF_RECORD_MMAP;
192 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
194 event->header.misc = PERF_RECORD_MISC_USER;
199 char execname[PATH_MAX];
200 char anonstr[] = "//anon";
204 if (fgets(bf, sizeof(bf), fp) == NULL)
207 /* ensure null termination since stack will be reused. */
208 strcpy(execname, "");
210 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
211 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %*x:%*x %*u %s\n",
212 &event->mmap.start, &event->mmap.len, prot,
222 if (!strcmp(execname, ""))
223 strcpy(execname, anonstr);
225 size = strlen(execname) + 1;
226 memcpy(event->mmap.filename, execname, size);
227 size = PERF_ALIGN(size, sizeof(u64));
228 event->mmap.len -= event->mmap.start;
229 event->mmap.header.size = (sizeof(event->mmap) -
230 (sizeof(event->mmap.filename) - size));
231 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
232 event->mmap.header.size += machine->id_hdr_size;
233 event->mmap.pid = tgid;
234 event->mmap.tid = pid;
236 if (process(tool, event, &synth_sample, machine) != 0) {
246 int perf_event__synthesize_modules(struct perf_tool *tool,
247 perf_event__handler_t process,
248 struct machine *machine)
252 struct map_groups *kmaps = &machine->kmaps;
253 union perf_event *event = zalloc((sizeof(event->mmap) +
254 machine->id_hdr_size));
256 pr_debug("Not enough memory synthesizing mmap event "
257 "for kernel modules\n");
261 event->header.type = PERF_RECORD_MMAP;
264 * kernel uses 0 for user space maps, see kernel/perf_event.c
267 if (machine__is_host(machine))
268 event->header.misc = PERF_RECORD_MISC_KERNEL;
270 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
272 for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
273 nd; nd = rb_next(nd)) {
275 struct map *pos = rb_entry(nd, struct map, rb_node);
277 if (pos->dso->kernel)
280 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
281 event->mmap.header.type = PERF_RECORD_MMAP;
282 event->mmap.header.size = (sizeof(event->mmap) -
283 (sizeof(event->mmap.filename) - size));
284 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
285 event->mmap.header.size += machine->id_hdr_size;
286 event->mmap.start = pos->start;
287 event->mmap.len = pos->end - pos->start;
288 event->mmap.pid = machine->pid;
290 memcpy(event->mmap.filename, pos->dso->long_name,
291 pos->dso->long_name_len + 1);
292 if (process(tool, event, &synth_sample, machine) != 0) {
302 static int __event__synthesize_thread(union perf_event *comm_event,
303 union perf_event *mmap_event,
305 perf_event__handler_t process,
306 struct perf_tool *tool,
307 struct machine *machine)
309 pid_t tgid = perf_event__synthesize_comm(tool, comm_event, pid, full,
313 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
317 int perf_event__synthesize_thread_map(struct perf_tool *tool,
318 struct thread_map *threads,
319 perf_event__handler_t process,
320 struct machine *machine)
322 union perf_event *comm_event, *mmap_event;
323 int err = -1, thread, j;
325 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
326 if (comm_event == NULL)
329 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
330 if (mmap_event == NULL)
334 for (thread = 0; thread < threads->nr; ++thread) {
335 if (__event__synthesize_thread(comm_event, mmap_event,
336 threads->map[thread], 0,
337 process, tool, machine)) {
343 * comm.pid is set to thread group id by
344 * perf_event__synthesize_comm
346 if ((int) comm_event->comm.pid != threads->map[thread]) {
347 bool need_leader = true;
349 /* is thread group leader in thread_map? */
350 for (j = 0; j < threads->nr; ++j) {
351 if ((int) comm_event->comm.pid == threads->map[j]) {
357 /* if not, generate events for it */
359 __event__synthesize_thread(comm_event,
361 comm_event->comm.pid, 0,
362 process, tool, machine)) {
375 int perf_event__synthesize_threads(struct perf_tool *tool,
376 perf_event__handler_t process,
377 struct machine *machine)
380 struct dirent dirent, *next;
381 union perf_event *comm_event, *mmap_event;
384 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
385 if (comm_event == NULL)
388 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
389 if (mmap_event == NULL)
392 proc = opendir("/proc");
396 while (!readdir_r(proc, &dirent, &next) && next) {
398 pid_t pid = strtol(dirent.d_name, &end, 10);
400 if (*end) /* only interested in proper numerical dirents */
403 * We may race with exiting thread, so don't stop just because
404 * one thread couldn't be synthesized.
406 __event__synthesize_thread(comm_event, mmap_event, pid, 1,
407 process, tool, machine);
420 struct process_symbol_args {
425 static int find_symbol_cb(void *arg, const char *name, char type,
428 struct process_symbol_args *args = arg;
431 * Must be a function or at least an alias, as in PARISC64, where "_text" is
432 * an 'A' to the same address as "_stext".
434 if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
435 type == 'A') || strcmp(name, args->name))
442 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
443 perf_event__handler_t process,
444 struct machine *machine,
445 const char *symbol_name)
448 const char *filename, *mmap_name;
450 char name_buff[PATH_MAX];
454 * We should get this from /sys/kernel/sections/.text, but till that is
455 * available use this, and after it is use this as a fallback for older
458 struct process_symbol_args args = { .name = symbol_name, };
459 union perf_event *event = zalloc((sizeof(event->mmap) +
460 machine->id_hdr_size));
462 pr_debug("Not enough memory synthesizing mmap event "
463 "for kernel modules\n");
467 mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
468 if (machine__is_host(machine)) {
470 * kernel uses PERF_RECORD_MISC_USER for user space maps,
471 * see kernel/perf_event.c __perf_event_mmap
473 event->header.misc = PERF_RECORD_MISC_KERNEL;
474 filename = "/proc/kallsyms";
476 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
477 if (machine__is_default_guest(machine))
478 filename = (char *) symbol_conf.default_guest_kallsyms;
480 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
485 if (kallsyms__parse(filename, &args, find_symbol_cb) <= 0) {
490 map = machine->vmlinux_maps[MAP__FUNCTION];
491 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
492 "%s%s", mmap_name, symbol_name) + 1;
493 size = PERF_ALIGN(size, sizeof(u64));
494 event->mmap.header.type = PERF_RECORD_MMAP;
495 event->mmap.header.size = (sizeof(event->mmap) -
496 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
497 event->mmap.pgoff = args.start;
498 event->mmap.start = map->start;
499 event->mmap.len = map->end - event->mmap.start;
500 event->mmap.pid = machine->pid;
502 err = process(tool, event, &synth_sample, machine);
508 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
510 return fprintf(fp, ": %s:%d\n", event->comm.comm, event->comm.tid);
513 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
514 union perf_event *event,
515 struct perf_sample *sample __maybe_unused,
516 struct machine *machine)
518 return machine__process_comm_event(machine, event);
521 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
522 union perf_event *event,
523 struct perf_sample *sample __maybe_unused,
524 struct machine *machine)
526 return machine__process_lost_event(machine, event);
529 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
531 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %s\n",
532 event->mmap.pid, event->mmap.tid, event->mmap.start,
533 event->mmap.len, event->mmap.pgoff, event->mmap.filename);
536 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
538 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
539 " %02x:%02x %"PRIu64" %"PRIu64"]: %s\n",
540 event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
541 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
542 event->mmap2.min, event->mmap2.ino,
543 event->mmap2.ino_generation,
544 event->mmap2.filename);
547 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
548 union perf_event *event,
549 struct perf_sample *sample __maybe_unused,
550 struct machine *machine)
552 return machine__process_mmap_event(machine, event);
555 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
556 union perf_event *event,
557 struct perf_sample *sample __maybe_unused,
558 struct machine *machine)
560 return machine__process_mmap2_event(machine, event);
563 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
565 return fprintf(fp, "(%d:%d):(%d:%d)\n",
566 event->fork.pid, event->fork.tid,
567 event->fork.ppid, event->fork.ptid);
570 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
571 union perf_event *event,
572 struct perf_sample *sample __maybe_unused,
573 struct machine *machine)
575 return machine__process_fork_event(machine, event);
578 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
579 union perf_event *event,
580 struct perf_sample *sample __maybe_unused,
581 struct machine *machine)
583 return machine__process_exit_event(machine, event);
586 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
588 size_t ret = fprintf(fp, "PERF_RECORD_%s",
589 perf_event__name(event->header.type));
591 switch (event->header.type) {
592 case PERF_RECORD_COMM:
593 ret += perf_event__fprintf_comm(event, fp);
595 case PERF_RECORD_FORK:
596 case PERF_RECORD_EXIT:
597 ret += perf_event__fprintf_task(event, fp);
599 case PERF_RECORD_MMAP:
600 ret += perf_event__fprintf_mmap(event, fp);
602 case PERF_RECORD_MMAP2:
603 ret += perf_event__fprintf_mmap2(event, fp);
606 ret += fprintf(fp, "\n");
612 int perf_event__process(struct perf_tool *tool __maybe_unused,
613 union perf_event *event,
614 struct perf_sample *sample __maybe_unused,
615 struct machine *machine)
617 return machine__process_event(machine, event);
620 void thread__find_addr_map(struct thread *self,
621 struct machine *machine, u8 cpumode,
622 enum map_type type, u64 addr,
623 struct addr_location *al)
625 struct map_groups *mg = &self->mg;
626 bool load_map = false;
630 al->cpumode = cpumode;
631 al->filtered = false;
633 if (machine == NULL) {
638 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
640 mg = &machine->kmaps;
642 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
644 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
646 mg = &machine->kmaps;
650 * 'u' means guest os user space.
651 * TODO: We don't support guest user space. Might support late.
653 if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest)
659 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
660 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
663 if ((cpumode == PERF_RECORD_MISC_USER ||
664 cpumode == PERF_RECORD_MISC_KERNEL) &&
671 al->map = map_groups__find(mg, type, al->addr);
672 if (al->map == NULL) {
674 * If this is outside of all known maps, and is a negative
675 * address, try to look it up in the kernel dso, as it might be
676 * a vsyscall or vdso (which executes in user-mode).
678 * XXX This is nasty, we should have a symbol list in the
679 * "[vdso]" dso, but for now lets use the old trick of looking
680 * in the whole kernel symbol list.
682 if ((long long)al->addr < 0 &&
683 cpumode == PERF_RECORD_MISC_USER &&
684 machine && mg != &machine->kmaps) {
685 mg = &machine->kmaps;
690 * Kernel maps might be changed when loading symbols so loading
691 * must be done prior to using kernel maps.
694 map__load(al->map, machine->symbol_filter);
695 al->addr = al->map->map_ip(al->map, al->addr);
699 void thread__find_addr_location(struct thread *thread, struct machine *machine,
700 u8 cpumode, enum map_type type, u64 addr,
701 struct addr_location *al)
703 thread__find_addr_map(thread, machine, cpumode, type, addr, al);
705 al->sym = map__find_symbol(al->map, al->addr,
706 machine->symbol_filter);
711 int perf_event__preprocess_sample(const union perf_event *event,
712 struct machine *machine,
713 struct addr_location *al,
714 struct perf_sample *sample)
716 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
717 struct thread *thread = machine__findnew_thread(machine, sample->pid,
723 if (symbol_conf.comm_list &&
724 !strlist__has_entry(symbol_conf.comm_list, thread->comm))
727 dump_printf(" ... thread: %s:%d\n", thread->comm, thread->tid);
729 * Have we already created the kernel maps for this machine?
731 * This should have happened earlier, when we processed the kernel MMAP
732 * events, but for older perf.data files there was no such thing, so do
735 if (cpumode == PERF_RECORD_MISC_KERNEL &&
736 machine->vmlinux_maps[MAP__FUNCTION] == NULL)
737 machine__create_kernel_maps(machine);
739 thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
741 dump_printf(" ...... dso: %s\n",
742 al->map ? al->map->dso->long_name :
743 al->level == 'H' ? "[hypervisor]" : "<not found>");
745 al->cpu = sample->cpu;
748 struct dso *dso = al->map->dso;
750 if (symbol_conf.dso_list &&
751 (!dso || !(strlist__has_entry(symbol_conf.dso_list,
753 (dso->short_name != dso->long_name &&
754 strlist__has_entry(symbol_conf.dso_list,
758 al->sym = map__find_symbol(al->map, al->addr,
759 machine->symbol_filter);
762 if (symbol_conf.sym_list &&
763 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,