4 #include <linux/kernel.h>
5 #include <linux/types.h>
6 #include <perf/cpumap.h>
10 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
11 #include <linux/perf_event.h>
12 #include <linux/zalloc.h>
23 #include "thread_map.h"
24 #include "time-utils.h"
25 #include <linux/ctype.h>
27 #include "util/namespaces.h"
29 #include "symbol/kallsyms.h"
33 #include "bpf-event.h"
34 #include "print_binary.h"
38 static const char *perf_event__names[] = {
40 [PERF_RECORD_MMAP] = "MMAP",
41 [PERF_RECORD_MMAP2] = "MMAP2",
42 [PERF_RECORD_LOST] = "LOST",
43 [PERF_RECORD_COMM] = "COMM",
44 [PERF_RECORD_EXIT] = "EXIT",
45 [PERF_RECORD_THROTTLE] = "THROTTLE",
46 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
47 [PERF_RECORD_FORK] = "FORK",
48 [PERF_RECORD_READ] = "READ",
49 [PERF_RECORD_SAMPLE] = "SAMPLE",
50 [PERF_RECORD_AUX] = "AUX",
51 [PERF_RECORD_ITRACE_START] = "ITRACE_START",
52 [PERF_RECORD_LOST_SAMPLES] = "LOST_SAMPLES",
53 [PERF_RECORD_SWITCH] = "SWITCH",
54 [PERF_RECORD_SWITCH_CPU_WIDE] = "SWITCH_CPU_WIDE",
55 [PERF_RECORD_NAMESPACES] = "NAMESPACES",
56 [PERF_RECORD_KSYMBOL] = "KSYMBOL",
57 [PERF_RECORD_BPF_EVENT] = "BPF_EVENT",
58 [PERF_RECORD_CGROUP] = "CGROUP",
59 [PERF_RECORD_TEXT_POKE] = "TEXT_POKE",
60 [PERF_RECORD_HEADER_ATTR] = "ATTR",
61 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
62 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
63 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
64 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
65 [PERF_RECORD_ID_INDEX] = "ID_INDEX",
66 [PERF_RECORD_AUXTRACE_INFO] = "AUXTRACE_INFO",
67 [PERF_RECORD_AUXTRACE] = "AUXTRACE",
68 [PERF_RECORD_AUXTRACE_ERROR] = "AUXTRACE_ERROR",
69 [PERF_RECORD_THREAD_MAP] = "THREAD_MAP",
70 [PERF_RECORD_CPU_MAP] = "CPU_MAP",
71 [PERF_RECORD_STAT_CONFIG] = "STAT_CONFIG",
72 [PERF_RECORD_STAT] = "STAT",
73 [PERF_RECORD_STAT_ROUND] = "STAT_ROUND",
74 [PERF_RECORD_EVENT_UPDATE] = "EVENT_UPDATE",
75 [PERF_RECORD_TIME_CONV] = "TIME_CONV",
76 [PERF_RECORD_HEADER_FEATURE] = "FEATURE",
77 [PERF_RECORD_COMPRESSED] = "COMPRESSED",
80 const char *perf_event__name(unsigned int id)
82 if (id >= ARRAY_SIZE(perf_event__names))
84 if (!perf_event__names[id])
86 return perf_event__names[id];
89 struct process_symbol_args {
94 static int find_symbol_cb(void *arg, const char *name, char type,
97 struct process_symbol_args *args = arg;
100 * Must be a function or at least an alias, as in PARISC64, where "_text" is
101 * an 'A' to the same address as "_stext".
103 if (!(kallsyms__is_function(type) ||
104 type == 'A') || strcmp(name, args->name))
111 int kallsyms__get_function_start(const char *kallsyms_filename,
112 const char *symbol_name, u64 *addr)
114 struct process_symbol_args args = { .name = symbol_name, };
116 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
123 void perf_event__read_stat_config(struct perf_stat_config *config,
124 struct perf_record_stat_config *event)
128 for (i = 0; i < event->nr; i++) {
130 switch (event->data[i].tag) {
131 #define CASE(__term, __val) \
132 case PERF_STAT_CONFIG_TERM__##__term: \
133 config->__val = event->data[i].val; \
136 CASE(AGGR_MODE, aggr_mode)
138 CASE(INTERVAL, interval)
141 pr_warning("unknown stat config term %" PRI_lu64 "\n",
147 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
151 if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
156 return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
159 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
162 struct perf_ns_link_info *ns_link_info;
163 u32 nr_namespaces, idx;
165 ns_link_info = event->namespaces.link_info;
166 nr_namespaces = event->namespaces.nr_namespaces;
168 ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
169 event->namespaces.pid,
170 event->namespaces.tid,
173 for (idx = 0; idx < nr_namespaces; idx++) {
174 if (idx && (idx % 4 == 0))
175 ret += fprintf(fp, "\n\t\t ");
177 ret += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
178 perf_ns__name(idx), (u64)ns_link_info[idx].dev,
179 (u64)ns_link_info[idx].ino,
180 ((idx + 1) != nr_namespaces) ? ", " : "]\n");
186 size_t perf_event__fprintf_cgroup(union perf_event *event, FILE *fp)
188 return fprintf(fp, " cgroup: %" PRI_lu64 " %s\n",
189 event->cgroup.id, event->cgroup.path);
192 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
193 union perf_event *event,
194 struct perf_sample *sample,
195 struct machine *machine)
197 return machine__process_comm_event(machine, event, sample);
200 int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
201 union perf_event *event,
202 struct perf_sample *sample,
203 struct machine *machine)
205 return machine__process_namespaces_event(machine, event, sample);
208 int perf_event__process_cgroup(struct perf_tool *tool __maybe_unused,
209 union perf_event *event,
210 struct perf_sample *sample,
211 struct machine *machine)
213 return machine__process_cgroup_event(machine, event, sample);
216 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
217 union perf_event *event,
218 struct perf_sample *sample,
219 struct machine *machine)
221 return machine__process_lost_event(machine, event, sample);
224 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
225 union perf_event *event,
226 struct perf_sample *sample __maybe_unused,
227 struct machine *machine)
229 return machine__process_aux_event(machine, event);
232 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
233 union perf_event *event,
234 struct perf_sample *sample __maybe_unused,
235 struct machine *machine)
237 return machine__process_itrace_start_event(machine, event);
240 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
241 union perf_event *event,
242 struct perf_sample *sample,
243 struct machine *machine)
245 return machine__process_lost_samples_event(machine, event, sample);
248 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
249 union perf_event *event,
250 struct perf_sample *sample __maybe_unused,
251 struct machine *machine)
253 return machine__process_switch_event(machine, event);
256 int perf_event__process_ksymbol(struct perf_tool *tool __maybe_unused,
257 union perf_event *event,
258 struct perf_sample *sample __maybe_unused,
259 struct machine *machine)
261 return machine__process_ksymbol(machine, event, sample);
264 int perf_event__process_bpf(struct perf_tool *tool __maybe_unused,
265 union perf_event *event,
266 struct perf_sample *sample,
267 struct machine *machine)
269 return machine__process_bpf(machine, event, sample);
272 int perf_event__process_text_poke(struct perf_tool *tool __maybe_unused,
273 union perf_event *event,
274 struct perf_sample *sample,
275 struct machine *machine)
277 return machine__process_text_poke(machine, event, sample);
280 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
282 return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64 "]: %c %s\n",
283 event->mmap.pid, event->mmap.tid, event->mmap.start,
284 event->mmap.len, event->mmap.pgoff,
285 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
286 event->mmap.filename);
289 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
291 return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64
292 " %02x:%02x %"PRI_lu64" %"PRI_lu64"]: %c%c%c%c %s\n",
293 event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
294 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
295 event->mmap2.min, event->mmap2.ino,
296 event->mmap2.ino_generation,
297 (event->mmap2.prot & PROT_READ) ? 'r' : '-',
298 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
299 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
300 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
301 event->mmap2.filename);
304 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
306 struct perf_thread_map *threads = thread_map__new_event(&event->thread_map);
309 ret = fprintf(fp, " nr: ");
312 ret += thread_map__fprintf(threads, fp);
314 ret += fprintf(fp, "failed to get threads from event\n");
316 perf_thread_map__put(threads);
320 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
322 struct perf_cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
325 ret = fprintf(fp, ": ");
328 ret += cpu_map__fprintf(cpus, fp);
330 ret += fprintf(fp, "failed to get cpumap from event\n");
332 perf_cpu_map__put(cpus);
336 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
337 union perf_event *event,
338 struct perf_sample *sample,
339 struct machine *machine)
341 return machine__process_mmap_event(machine, event, sample);
344 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
345 union perf_event *event,
346 struct perf_sample *sample,
347 struct machine *machine)
349 return machine__process_mmap2_event(machine, event, sample);
352 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
354 return fprintf(fp, "(%d:%d):(%d:%d)\n",
355 event->fork.pid, event->fork.tid,
356 event->fork.ppid, event->fork.ptid);
359 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
360 union perf_event *event,
361 struct perf_sample *sample,
362 struct machine *machine)
364 return machine__process_fork_event(machine, event, sample);
367 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
368 union perf_event *event,
369 struct perf_sample *sample,
370 struct machine *machine)
372 return machine__process_exit_event(machine, event, sample);
375 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
377 return fprintf(fp, " offset: %#"PRI_lx64" size: %#"PRI_lx64" flags: %#"PRI_lx64" [%s%s%s]\n",
378 event->aux.aux_offset, event->aux.aux_size,
380 event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
381 event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
382 event->aux.flags & PERF_AUX_FLAG_PARTIAL ? "P" : "");
385 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
387 return fprintf(fp, " pid: %u tid: %u\n",
388 event->itrace_start.pid, event->itrace_start.tid);
391 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
393 bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
394 const char *in_out = !out ? "IN " :
395 !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
396 "OUT " : "OUT preempt";
398 if (event->header.type == PERF_RECORD_SWITCH)
399 return fprintf(fp, " %s\n", in_out);
401 return fprintf(fp, " %s %s pid/tid: %5d/%-5d\n",
402 in_out, out ? "next" : "prev",
403 event->context_switch.next_prev_pid,
404 event->context_switch.next_prev_tid);
407 static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
409 return fprintf(fp, " lost %" PRI_lu64 "\n", event->lost.lost);
412 size_t perf_event__fprintf_ksymbol(union perf_event *event, FILE *fp)
414 return fprintf(fp, " addr %" PRI_lx64 " len %u type %u flags 0x%x name %s\n",
415 event->ksymbol.addr, event->ksymbol.len,
416 event->ksymbol.ksym_type,
417 event->ksymbol.flags, event->ksymbol.name);
420 size_t perf_event__fprintf_bpf(union perf_event *event, FILE *fp)
422 return fprintf(fp, " type %u, flags %u, id %u\n",
423 event->bpf.type, event->bpf.flags, event->bpf.id);
426 static int text_poke_printer(enum binary_printer_ops op, unsigned int val,
427 void *extra, FILE *fp)
429 bool old = *(bool *)extra;
432 case BINARY_PRINT_LINE_BEGIN:
433 return fprintf(fp, " %s bytes:", old ? "Old" : "New");
434 case BINARY_PRINT_NUM_DATA:
435 return fprintf(fp, " %02x", val);
436 case BINARY_PRINT_LINE_END:
437 return fprintf(fp, "\n");
443 size_t perf_event__fprintf_text_poke(union perf_event *event, struct machine *machine, FILE *fp)
445 struct perf_record_text_poke_event *tp = &event->text_poke;
449 ret = fprintf(fp, " %" PRI_lx64 " ", tp->addr);
451 struct addr_location al;
453 al.map = maps__find(&machine->kmaps, tp->addr);
454 if (al.map && map__load(al.map) >= 0) {
455 al.addr = al.map->map_ip(al.map, tp->addr);
456 al.sym = map__find_symbol(al.map, al.addr);
458 ret += symbol__fprintf_symname_offs(al.sym, &al, fp);
461 ret += fprintf(fp, " old len %u new len %u\n", tp->old_len, tp->new_len);
463 ret += binary__fprintf(tp->bytes, tp->old_len, 16, text_poke_printer,
466 ret += binary__fprintf(tp->bytes + tp->old_len, tp->new_len, 16,
467 text_poke_printer, &old, fp);
471 size_t perf_event__fprintf(union perf_event *event, struct machine *machine, FILE *fp)
473 size_t ret = fprintf(fp, "PERF_RECORD_%s",
474 perf_event__name(event->header.type));
476 switch (event->header.type) {
477 case PERF_RECORD_COMM:
478 ret += perf_event__fprintf_comm(event, fp);
480 case PERF_RECORD_FORK:
481 case PERF_RECORD_EXIT:
482 ret += perf_event__fprintf_task(event, fp);
484 case PERF_RECORD_MMAP:
485 ret += perf_event__fprintf_mmap(event, fp);
487 case PERF_RECORD_NAMESPACES:
488 ret += perf_event__fprintf_namespaces(event, fp);
490 case PERF_RECORD_CGROUP:
491 ret += perf_event__fprintf_cgroup(event, fp);
493 case PERF_RECORD_MMAP2:
494 ret += perf_event__fprintf_mmap2(event, fp);
496 case PERF_RECORD_AUX:
497 ret += perf_event__fprintf_aux(event, fp);
499 case PERF_RECORD_ITRACE_START:
500 ret += perf_event__fprintf_itrace_start(event, fp);
502 case PERF_RECORD_SWITCH:
503 case PERF_RECORD_SWITCH_CPU_WIDE:
504 ret += perf_event__fprintf_switch(event, fp);
506 case PERF_RECORD_LOST:
507 ret += perf_event__fprintf_lost(event, fp);
509 case PERF_RECORD_KSYMBOL:
510 ret += perf_event__fprintf_ksymbol(event, fp);
512 case PERF_RECORD_BPF_EVENT:
513 ret += perf_event__fprintf_bpf(event, fp);
515 case PERF_RECORD_TEXT_POKE:
516 ret += perf_event__fprintf_text_poke(event, machine, fp);
519 ret += fprintf(fp, "\n");
525 int perf_event__process(struct perf_tool *tool __maybe_unused,
526 union perf_event *event,
527 struct perf_sample *sample,
528 struct machine *machine)
530 return machine__process_event(machine, event, sample);
533 struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
534 struct addr_location *al)
536 struct maps *maps = thread->maps;
537 struct machine *machine = maps->machine;
538 bool load_map = false;
543 al->cpumode = cpumode;
546 if (machine == NULL) {
551 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
553 al->maps = maps = &machine->kmaps;
555 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
557 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
559 al->maps = maps = &machine->kmaps;
561 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
567 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
568 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
570 al->filtered |= (1 << HIST_FILTER__GUEST);
571 if ((cpumode == PERF_RECORD_MISC_USER ||
572 cpumode == PERF_RECORD_MISC_KERNEL) &&
574 al->filtered |= (1 << HIST_FILTER__HOST);
579 al->map = maps__find(maps, al->addr);
580 if (al->map != NULL) {
582 * Kernel maps might be changed when loading symbols so loading
583 * must be done prior to using kernel maps.
587 al->addr = al->map->map_ip(al->map, al->addr);
594 * For branch stacks or branch samples, the sample cpumode might not be correct
595 * because it applies only to the sample 'ip' and not necessary to 'addr' or
596 * branch stack addresses. If possible, use a fallback to deal with those cases.
598 struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr,
599 struct addr_location *al)
601 struct map *map = thread__find_map(thread, cpumode, addr, al);
602 struct machine *machine = thread->maps->machine;
603 u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr);
605 if (map || addr_cpumode == cpumode)
608 return thread__find_map(thread, addr_cpumode, addr, al);
611 struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
612 u64 addr, struct addr_location *al)
615 if (thread__find_map(thread, cpumode, addr, al))
616 al->sym = map__find_symbol(al->map, al->addr);
620 struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode,
621 u64 addr, struct addr_location *al)
624 if (thread__find_map_fb(thread, cpumode, addr, al))
625 al->sym = map__find_symbol(al->map, al->addr);
630 * Callers need to drop the reference to al->thread, obtained in
631 * machine__findnew_thread()
633 int machine__resolve(struct machine *machine, struct addr_location *al,
634 struct perf_sample *sample)
636 struct thread *thread = machine__findnew_thread(machine, sample->pid,
642 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
643 thread__find_map(thread, sample->cpumode, sample->ip, al);
644 dump_printf(" ...... dso: %s\n",
645 al->map ? al->map->dso->long_name :
646 al->level == 'H' ? "[hypervisor]" : "<not found>");
648 if (thread__is_filtered(thread))
649 al->filtered |= (1 << HIST_FILTER__THREAD);
652 al->cpu = sample->cpu;
657 struct perf_env *env = machine->env;
660 al->socket = env->cpu[al->cpu].socket_id;
664 struct dso *dso = al->map->dso;
666 if (symbol_conf.dso_list &&
667 (!dso || !(strlist__has_entry(symbol_conf.dso_list,
669 (dso->short_name != dso->long_name &&
670 strlist__has_entry(symbol_conf.dso_list,
671 dso->long_name))))) {
672 al->filtered |= (1 << HIST_FILTER__DSO);
675 al->sym = map__find_symbol(al->map, al->addr);
676 } else if (symbol_conf.dso_list) {
677 al->filtered |= (1 << HIST_FILTER__DSO);
680 if (symbol_conf.sym_list) {
682 char al_addr_str[32];
683 size_t sz = sizeof(al_addr_str);
686 ret = strlist__has_entry(symbol_conf.sym_list,
689 if (!ret && al->sym) {
690 snprintf(al_addr_str, sz, "0x%"PRIx64,
691 al->map->unmap_ip(al->map, al->sym->start));
692 ret = strlist__has_entry(symbol_conf.sym_list,
696 al->filtered |= (1 << HIST_FILTER__SYMBOL);
703 * The preprocess_sample method will return with reference counts for the
704 * in it, when done using (and perhaps getting ref counts if needing to
705 * keep a pointer to one of those entries) it must be paired with
706 * addr_location__put(), so that the refcounts can be decremented.
708 void addr_location__put(struct addr_location *al)
710 thread__zput(al->thread);
713 bool is_bts_event(struct perf_event_attr *attr)
715 return attr->type == PERF_TYPE_HARDWARE &&
716 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
717 attr->sample_period == 1;
720 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
722 if (attr->type == PERF_TYPE_SOFTWARE &&
723 (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
724 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
725 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
728 if (is_bts_event(attr))
734 void thread__resolve(struct thread *thread, struct addr_location *al,
735 struct perf_sample *sample)
737 thread__find_map_fb(thread, sample->cpumode, sample->addr, al);
739 al->cpu = sample->cpu;
743 al->sym = map__find_symbol(al->map, al->addr);