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1 #include <errno.h>
2 #include <fcntl.h>
3 #include <inttypes.h>
4 #include <linux/kernel.h>
5 #include <linux/types.h>
6 #include <perf/cpumap.h>
7 #include <sys/types.h>
8 #include <sys/stat.h>
9 #include <unistd.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>
13 #include "cpumap.h"
14 #include "dso.h"
15 #include "event.h"
16 #include "debug.h"
17 #include "hist.h"
18 #include "machine.h"
19 #include "sort.h"
20 #include "string2.h"
21 #include "strlist.h"
22 #include "thread.h"
23 #include "thread_map.h"
24 #include "time-utils.h"
25 #include <linux/ctype.h>
26 #include "map.h"
27 #include "util/namespaces.h"
28 #include "symbol.h"
29 #include "symbol/kallsyms.h"
30 #include "asm/bug.h"
31 #include "stat.h"
32 #include "session.h"
33 #include "bpf-event.h"
34 #include "tool.h"
35 #include "../perf.h"
36
37 static const char *perf_event__names[] = {
38 [0] = "TOTAL",
39 [PERF_RECORD_MMAP] = "MMAP",
40 [PERF_RECORD_MMAP2] = "MMAP2",
41 [PERF_RECORD_LOST] = "LOST",
42 [PERF_RECORD_COMM] = "COMM",
43 [PERF_RECORD_EXIT] = "EXIT",
44 [PERF_RECORD_THROTTLE] = "THROTTLE",
45 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
46 [PERF_RECORD_FORK] = "FORK",
47 [PERF_RECORD_READ] = "READ",
48 [PERF_RECORD_SAMPLE] = "SAMPLE",
49 [PERF_RECORD_AUX] = "AUX",
50 [PERF_RECORD_ITRACE_START] = "ITRACE_START",
51 [PERF_RECORD_LOST_SAMPLES] = "LOST_SAMPLES",
52 [PERF_RECORD_SWITCH] = "SWITCH",
53 [PERF_RECORD_SWITCH_CPU_WIDE] = "SWITCH_CPU_WIDE",
54 [PERF_RECORD_NAMESPACES] = "NAMESPACES",
55 [PERF_RECORD_KSYMBOL] = "KSYMBOL",
56 [PERF_RECORD_BPF_EVENT] = "BPF_EVENT",
57 [PERF_RECORD_HEADER_ATTR] = "ATTR",
58 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
59 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
60 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
61 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
62 [PERF_RECORD_ID_INDEX] = "ID_INDEX",
63 [PERF_RECORD_AUXTRACE_INFO] = "AUXTRACE_INFO",
64 [PERF_RECORD_AUXTRACE] = "AUXTRACE",
65 [PERF_RECORD_AUXTRACE_ERROR] = "AUXTRACE_ERROR",
66 [PERF_RECORD_THREAD_MAP] = "THREAD_MAP",
67 [PERF_RECORD_CPU_MAP] = "CPU_MAP",
68 [PERF_RECORD_STAT_CONFIG] = "STAT_CONFIG",
69 [PERF_RECORD_STAT] = "STAT",
70 [PERF_RECORD_STAT_ROUND] = "STAT_ROUND",
71 [PERF_RECORD_EVENT_UPDATE] = "EVENT_UPDATE",
72 [PERF_RECORD_TIME_CONV] = "TIME_CONV",
73 [PERF_RECORD_HEADER_FEATURE] = "FEATURE",
74 [PERF_RECORD_COMPRESSED] = "COMPRESSED",
75 };
76
77 const char *perf_event__name(unsigned int id)
78 {
79 if (id >= ARRAY_SIZE(perf_event__names))
80 return "INVALID";
81 if (!perf_event__names[id])
82 return "UNKNOWN";
83 return perf_event__names[id];
84 }
85
86 struct process_symbol_args {
87 const char *name;
88 u64 start;
89 };
90
91 static int find_symbol_cb(void *arg, const char *name, char type,
92 u64 start)
93 {
94 struct process_symbol_args *args = arg;
95
96 /*
97 * Must be a function or at least an alias, as in PARISC64, where "_text" is
98 * an 'A' to the same address as "_stext".
99 */
100 if (!(kallsyms__is_function(type) ||
101 type == 'A') || strcmp(name, args->name))
102 return 0;
103
104 args->start = start;
105 return 1;
106 }
107
108 int kallsyms__get_function_start(const char *kallsyms_filename,
109 const char *symbol_name, u64 *addr)
110 {
111 struct process_symbol_args args = { .name = symbol_name, };
112
113 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
114 return -1;
115
116 *addr = args.start;
117 return 0;
118 }
119
120 void perf_event__read_stat_config(struct perf_stat_config *config,
121 struct perf_record_stat_config *event)
122 {
123 unsigned i;
124
125 for (i = 0; i < event->nr; i++) {
126
127 switch (event->data[i].tag) {
128 #define CASE(__term, __val) \
129 case PERF_STAT_CONFIG_TERM__##__term: \
130 config->__val = event->data[i].val; \
131 break;
132
133 CASE(AGGR_MODE, aggr_mode)
134 CASE(SCALE, scale)
135 CASE(INTERVAL, interval)
136 #undef CASE
137 default:
138 pr_warning("unknown stat config term %" PRI_lu64 "\n",
139 event->data[i].tag);
140 }
141 }
142 }
143
144 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
145 {
146 const char *s;
147
148 if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
149 s = " exec";
150 else
151 s = "";
152
153 return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
154 }
155
156 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
157 {
158 size_t ret = 0;
159 struct perf_ns_link_info *ns_link_info;
160 u32 nr_namespaces, idx;
161
162 ns_link_info = event->namespaces.link_info;
163 nr_namespaces = event->namespaces.nr_namespaces;
164
165 ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
166 event->namespaces.pid,
167 event->namespaces.tid,
168 nr_namespaces);
169
170 for (idx = 0; idx < nr_namespaces; idx++) {
171 if (idx && (idx % 4 == 0))
172 ret += fprintf(fp, "\n\t\t ");
173
174 ret += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
175 perf_ns__name(idx), (u64)ns_link_info[idx].dev,
176 (u64)ns_link_info[idx].ino,
177 ((idx + 1) != nr_namespaces) ? ", " : "]\n");
178 }
179
180 return ret;
181 }
182
183 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
184 union perf_event *event,
185 struct perf_sample *sample,
186 struct machine *machine)
187 {
188 return machine__process_comm_event(machine, event, sample);
189 }
190
191 int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
192 union perf_event *event,
193 struct perf_sample *sample,
194 struct machine *machine)
195 {
196 return machine__process_namespaces_event(machine, event, sample);
197 }
198
199 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
200 union perf_event *event,
201 struct perf_sample *sample,
202 struct machine *machine)
203 {
204 return machine__process_lost_event(machine, event, sample);
205 }
206
207 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
208 union perf_event *event,
209 struct perf_sample *sample __maybe_unused,
210 struct machine *machine)
211 {
212 return machine__process_aux_event(machine, event);
213 }
214
215 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
216 union perf_event *event,
217 struct perf_sample *sample __maybe_unused,
218 struct machine *machine)
219 {
220 return machine__process_itrace_start_event(machine, event);
221 }
222
223 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
224 union perf_event *event,
225 struct perf_sample *sample,
226 struct machine *machine)
227 {
228 return machine__process_lost_samples_event(machine, event, sample);
229 }
230
231 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
232 union perf_event *event,
233 struct perf_sample *sample __maybe_unused,
234 struct machine *machine)
235 {
236 return machine__process_switch_event(machine, event);
237 }
238
239 int perf_event__process_ksymbol(struct perf_tool *tool __maybe_unused,
240 union perf_event *event,
241 struct perf_sample *sample __maybe_unused,
242 struct machine *machine)
243 {
244 return machine__process_ksymbol(machine, event, sample);
245 }
246
247 int perf_event__process_bpf(struct perf_tool *tool __maybe_unused,
248 union perf_event *event,
249 struct perf_sample *sample,
250 struct machine *machine)
251 {
252 return machine__process_bpf(machine, event, sample);
253 }
254
255 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
256 {
257 return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64 "]: %c %s\n",
258 event->mmap.pid, event->mmap.tid, event->mmap.start,
259 event->mmap.len, event->mmap.pgoff,
260 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
261 event->mmap.filename);
262 }
263
264 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
265 {
266 return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64
267 " %02x:%02x %"PRI_lu64" %"PRI_lu64"]: %c%c%c%c %s\n",
268 event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
269 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
270 event->mmap2.min, event->mmap2.ino,
271 event->mmap2.ino_generation,
272 (event->mmap2.prot & PROT_READ) ? 'r' : '-',
273 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
274 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
275 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
276 event->mmap2.filename);
277 }
278
279 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
280 {
281 struct perf_thread_map *threads = thread_map__new_event(&event->thread_map);
282 size_t ret;
283
284 ret = fprintf(fp, " nr: ");
285
286 if (threads)
287 ret += thread_map__fprintf(threads, fp);
288 else
289 ret += fprintf(fp, "failed to get threads from event\n");
290
291 perf_thread_map__put(threads);
292 return ret;
293 }
294
295 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
296 {
297 struct perf_cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
298 size_t ret;
299
300 ret = fprintf(fp, ": ");
301
302 if (cpus)
303 ret += cpu_map__fprintf(cpus, fp);
304 else
305 ret += fprintf(fp, "failed to get cpumap from event\n");
306
307 perf_cpu_map__put(cpus);
308 return ret;
309 }
310
311 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
312 union perf_event *event,
313 struct perf_sample *sample,
314 struct machine *machine)
315 {
316 return machine__process_mmap_event(machine, event, sample);
317 }
318
319 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
320 union perf_event *event,
321 struct perf_sample *sample,
322 struct machine *machine)
323 {
324 return machine__process_mmap2_event(machine, event, sample);
325 }
326
327 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
328 {
329 return fprintf(fp, "(%d:%d):(%d:%d)\n",
330 event->fork.pid, event->fork.tid,
331 event->fork.ppid, event->fork.ptid);
332 }
333
334 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
335 union perf_event *event,
336 struct perf_sample *sample,
337 struct machine *machine)
338 {
339 return machine__process_fork_event(machine, event, sample);
340 }
341
342 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
343 union perf_event *event,
344 struct perf_sample *sample,
345 struct machine *machine)
346 {
347 return machine__process_exit_event(machine, event, sample);
348 }
349
350 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
351 {
352 return fprintf(fp, " offset: %#"PRI_lx64" size: %#"PRI_lx64" flags: %#"PRI_lx64" [%s%s%s]\n",
353 event->aux.aux_offset, event->aux.aux_size,
354 event->aux.flags,
355 event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
356 event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
357 event->aux.flags & PERF_AUX_FLAG_PARTIAL ? "P" : "");
358 }
359
360 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
361 {
362 return fprintf(fp, " pid: %u tid: %u\n",
363 event->itrace_start.pid, event->itrace_start.tid);
364 }
365
366 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
367 {
368 bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
369 const char *in_out = !out ? "IN " :
370 !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
371 "OUT " : "OUT preempt";
372
373 if (event->header.type == PERF_RECORD_SWITCH)
374 return fprintf(fp, " %s\n", in_out);
375
376 return fprintf(fp, " %s %s pid/tid: %5u/%-5u\n",
377 in_out, out ? "next" : "prev",
378 event->context_switch.next_prev_pid,
379 event->context_switch.next_prev_tid);
380 }
381
382 static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
383 {
384 return fprintf(fp, " lost %" PRI_lu64 "\n", event->lost.lost);
385 }
386
387 size_t perf_event__fprintf_ksymbol(union perf_event *event, FILE *fp)
388 {
389 return fprintf(fp, " addr %" PRI_lx64 " len %u type %u flags 0x%x name %s\n",
390 event->ksymbol.addr, event->ksymbol.len,
391 event->ksymbol.ksym_type,
392 event->ksymbol.flags, event->ksymbol.name);
393 }
394
395 size_t perf_event__fprintf_bpf(union perf_event *event, FILE *fp)
396 {
397 return fprintf(fp, " type %u, flags %u, id %u\n",
398 event->bpf.type, event->bpf.flags, event->bpf.id);
399 }
400
401 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
402 {
403 size_t ret = fprintf(fp, "PERF_RECORD_%s",
404 perf_event__name(event->header.type));
405
406 switch (event->header.type) {
407 case PERF_RECORD_COMM:
408 ret += perf_event__fprintf_comm(event, fp);
409 break;
410 case PERF_RECORD_FORK:
411 case PERF_RECORD_EXIT:
412 ret += perf_event__fprintf_task(event, fp);
413 break;
414 case PERF_RECORD_MMAP:
415 ret += perf_event__fprintf_mmap(event, fp);
416 break;
417 case PERF_RECORD_NAMESPACES:
418 ret += perf_event__fprintf_namespaces(event, fp);
419 break;
420 case PERF_RECORD_MMAP2:
421 ret += perf_event__fprintf_mmap2(event, fp);
422 break;
423 case PERF_RECORD_AUX:
424 ret += perf_event__fprintf_aux(event, fp);
425 break;
426 case PERF_RECORD_ITRACE_START:
427 ret += perf_event__fprintf_itrace_start(event, fp);
428 break;
429 case PERF_RECORD_SWITCH:
430 case PERF_RECORD_SWITCH_CPU_WIDE:
431 ret += perf_event__fprintf_switch(event, fp);
432 break;
433 case PERF_RECORD_LOST:
434 ret += perf_event__fprintf_lost(event, fp);
435 break;
436 case PERF_RECORD_KSYMBOL:
437 ret += perf_event__fprintf_ksymbol(event, fp);
438 break;
439 case PERF_RECORD_BPF_EVENT:
440 ret += perf_event__fprintf_bpf(event, fp);
441 break;
442 default:
443 ret += fprintf(fp, "\n");
444 }
445
446 return ret;
447 }
448
449 int perf_event__process(struct perf_tool *tool __maybe_unused,
450 union perf_event *event,
451 struct perf_sample *sample,
452 struct machine *machine)
453 {
454 return machine__process_event(machine, event, sample);
455 }
456
457 struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
458 struct addr_location *al)
459 {
460 struct map_groups *mg = thread->mg;
461 struct machine *machine = mg->machine;
462 bool load_map = false;
463
464 al->machine = machine;
465 al->thread = thread;
466 al->addr = addr;
467 al->cpumode = cpumode;
468 al->filtered = 0;
469
470 if (machine == NULL) {
471 al->map = NULL;
472 return NULL;
473 }
474
475 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
476 al->level = 'k';
477 mg = &machine->kmaps;
478 load_map = true;
479 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
480 al->level = '.';
481 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
482 al->level = 'g';
483 mg = &machine->kmaps;
484 load_map = true;
485 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
486 al->level = 'u';
487 } else {
488 al->level = 'H';
489 al->map = NULL;
490
491 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
492 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
493 !perf_guest)
494 al->filtered |= (1 << HIST_FILTER__GUEST);
495 if ((cpumode == PERF_RECORD_MISC_USER ||
496 cpumode == PERF_RECORD_MISC_KERNEL) &&
497 !perf_host)
498 al->filtered |= (1 << HIST_FILTER__HOST);
499
500 return NULL;
501 }
502
503 al->map = map_groups__find(mg, al->addr);
504 if (al->map != NULL) {
505 /*
506 * Kernel maps might be changed when loading symbols so loading
507 * must be done prior to using kernel maps.
508 */
509 if (load_map)
510 map__load(al->map);
511 al->addr = al->map->map_ip(al->map, al->addr);
512 }
513
514 return al->map;
515 }
516
517 /*
518 * For branch stacks or branch samples, the sample cpumode might not be correct
519 * because it applies only to the sample 'ip' and not necessary to 'addr' or
520 * branch stack addresses. If possible, use a fallback to deal with those cases.
521 */
522 struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr,
523 struct addr_location *al)
524 {
525 struct map *map = thread__find_map(thread, cpumode, addr, al);
526 struct machine *machine = thread->mg->machine;
527 u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr);
528
529 if (map || addr_cpumode == cpumode)
530 return map;
531
532 return thread__find_map(thread, addr_cpumode, addr, al);
533 }
534
535 struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
536 u64 addr, struct addr_location *al)
537 {
538 al->sym = NULL;
539 if (thread__find_map(thread, cpumode, addr, al))
540 al->sym = map__find_symbol(al->map, al->addr);
541 return al->sym;
542 }
543
544 struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode,
545 u64 addr, struct addr_location *al)
546 {
547 al->sym = NULL;
548 if (thread__find_map_fb(thread, cpumode, addr, al))
549 al->sym = map__find_symbol(al->map, al->addr);
550 return al->sym;
551 }
552
553 /*
554 * Callers need to drop the reference to al->thread, obtained in
555 * machine__findnew_thread()
556 */
557 int machine__resolve(struct machine *machine, struct addr_location *al,
558 struct perf_sample *sample)
559 {
560 struct thread *thread = machine__findnew_thread(machine, sample->pid,
561 sample->tid);
562
563 if (thread == NULL)
564 return -1;
565
566 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
567 thread__find_map(thread, sample->cpumode, sample->ip, al);
568 dump_printf(" ...... dso: %s\n",
569 al->map ? al->map->dso->long_name :
570 al->level == 'H' ? "[hypervisor]" : "<not found>");
571
572 if (thread__is_filtered(thread))
573 al->filtered |= (1 << HIST_FILTER__THREAD);
574
575 al->sym = NULL;
576 al->cpu = sample->cpu;
577 al->socket = -1;
578 al->srcline = NULL;
579
580 if (al->cpu >= 0) {
581 struct perf_env *env = machine->env;
582
583 if (env && env->cpu)
584 al->socket = env->cpu[al->cpu].socket_id;
585 }
586
587 if (al->map) {
588 struct dso *dso = al->map->dso;
589
590 if (symbol_conf.dso_list &&
591 (!dso || !(strlist__has_entry(symbol_conf.dso_list,
592 dso->short_name) ||
593 (dso->short_name != dso->long_name &&
594 strlist__has_entry(symbol_conf.dso_list,
595 dso->long_name))))) {
596 al->filtered |= (1 << HIST_FILTER__DSO);
597 }
598
599 al->sym = map__find_symbol(al->map, al->addr);
600 }
601
602 if (symbol_conf.sym_list &&
603 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
604 al->sym->name))) {
605 al->filtered |= (1 << HIST_FILTER__SYMBOL);
606 }
607
608 return 0;
609 }
610
611 /*
612 * The preprocess_sample method will return with reference counts for the
613 * in it, when done using (and perhaps getting ref counts if needing to
614 * keep a pointer to one of those entries) it must be paired with
615 * addr_location__put(), so that the refcounts can be decremented.
616 */
617 void addr_location__put(struct addr_location *al)
618 {
619 thread__zput(al->thread);
620 }
621
622 bool is_bts_event(struct perf_event_attr *attr)
623 {
624 return attr->type == PERF_TYPE_HARDWARE &&
625 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
626 attr->sample_period == 1;
627 }
628
629 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
630 {
631 if (attr->type == PERF_TYPE_SOFTWARE &&
632 (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
633 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
634 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
635 return true;
636
637 if (is_bts_event(attr))
638 return true;
639
640 return false;
641 }
642
643 void thread__resolve(struct thread *thread, struct addr_location *al,
644 struct perf_sample *sample)
645 {
646 thread__find_map_fb(thread, sample->cpumode, sample->addr, al);
647
648 al->cpu = sample->cpu;
649 al->sym = NULL;
650
651 if (al->map)
652 al->sym = map__find_symbol(al->map, al->addr);
653 }
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