1 #include <linux/kernel.h>
2 #include <traceevent/event-parse.h>
3
4 #include <byteswap.h>
5 #include <unistd.h>
6 #include <sys/types.h>
7 #include <sys/mman.h>
8
9 #include "evlist.h"
10 #include "evsel.h"
11 #include "session.h"
12 #include "tool.h"
13 #include "sort.h"
14 #include "util.h"
15 #include "cpumap.h"
16 #include "perf_regs.h"
17 #include "asm/bug.h"
18
perf_session__open(struct perf_session * session)19 static int perf_session__open(struct perf_session *session)
20 {
21 struct perf_data_file *file = session->file;
22
23 if (perf_session__read_header(session) < 0) {
24 pr_err("incompatible file format (rerun with -v to learn more)");
25 return -1;
26 }
27
28 if (perf_data_file__is_pipe(file))
29 return 0;
30
31 if (!perf_evlist__valid_sample_type(session->evlist)) {
32 pr_err("non matching sample_type");
33 return -1;
34 }
35
36 if (!perf_evlist__valid_sample_id_all(session->evlist)) {
37 pr_err("non matching sample_id_all");
38 return -1;
39 }
40
41 if (!perf_evlist__valid_read_format(session->evlist)) {
42 pr_err("non matching read_format");
43 return -1;
44 }
45
46 return 0;
47 }
48
perf_session__set_id_hdr_size(struct perf_session * session)49 void perf_session__set_id_hdr_size(struct perf_session *session)
50 {
51 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
52
53 machines__set_id_hdr_size(&session->machines, id_hdr_size);
54 }
55
perf_session__create_kernel_maps(struct perf_session * session)56 int perf_session__create_kernel_maps(struct perf_session *session)
57 {
58 int ret = machine__create_kernel_maps(&session->machines.host);
59
60 if (ret >= 0)
61 ret = machines__create_guest_kernel_maps(&session->machines);
62 return ret;
63 }
64
perf_session__destroy_kernel_maps(struct perf_session * session)65 static void perf_session__destroy_kernel_maps(struct perf_session *session)
66 {
67 machines__destroy_kernel_maps(&session->machines);
68 }
69
perf_session__has_comm_exec(struct perf_session * session)70 static bool perf_session__has_comm_exec(struct perf_session *session)
71 {
72 struct perf_evsel *evsel;
73
74 evlist__for_each(session->evlist, evsel) {
75 if (evsel->attr.comm_exec)
76 return true;
77 }
78
79 return false;
80 }
81
perf_session__set_comm_exec(struct perf_session * session)82 static void perf_session__set_comm_exec(struct perf_session *session)
83 {
84 bool comm_exec = perf_session__has_comm_exec(session);
85
86 machines__set_comm_exec(&session->machines, comm_exec);
87 }
88
perf_session__new(struct perf_data_file * file,bool repipe,struct perf_tool * tool)89 struct perf_session *perf_session__new(struct perf_data_file *file,
90 bool repipe, struct perf_tool *tool)
91 {
92 struct perf_session *session = zalloc(sizeof(*session));
93
94 if (!session)
95 goto out;
96
97 session->repipe = repipe;
98 ordered_events__init(&session->ordered_events);
99 machines__init(&session->machines);
100
101 if (file) {
102 if (perf_data_file__open(file))
103 goto out_delete;
104
105 session->file = file;
106
107 if (perf_data_file__is_read(file)) {
108 if (perf_session__open(session) < 0)
109 goto out_close;
110
111 perf_session__set_id_hdr_size(session);
112 perf_session__set_comm_exec(session);
113 }
114 }
115
116 if (!file || perf_data_file__is_write(file)) {
117 /*
118 * In O_RDONLY mode this will be performed when reading the
119 * kernel MMAP event, in perf_event__process_mmap().
120 */
121 if (perf_session__create_kernel_maps(session) < 0)
122 pr_warning("Cannot read kernel map\n");
123 }
124
125 if (tool && tool->ordering_requires_timestamps &&
126 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
127 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
128 tool->ordered_events = false;
129 }
130
131 return session;
132
133 out_close:
134 perf_data_file__close(file);
135 out_delete:
136 perf_session__delete(session);
137 out:
138 return NULL;
139 }
140
perf_session__delete_dead_threads(struct perf_session * session)141 static void perf_session__delete_dead_threads(struct perf_session *session)
142 {
143 machine__delete_dead_threads(&session->machines.host);
144 }
145
perf_session__delete_threads(struct perf_session * session)146 static void perf_session__delete_threads(struct perf_session *session)
147 {
148 machine__delete_threads(&session->machines.host);
149 }
150
perf_session_env__delete(struct perf_session_env * env)151 static void perf_session_env__delete(struct perf_session_env *env)
152 {
153 zfree(&env->hostname);
154 zfree(&env->os_release);
155 zfree(&env->version);
156 zfree(&env->arch);
157 zfree(&env->cpu_desc);
158 zfree(&env->cpuid);
159
160 zfree(&env->cmdline);
161 zfree(&env->sibling_cores);
162 zfree(&env->sibling_threads);
163 zfree(&env->numa_nodes);
164 zfree(&env->pmu_mappings);
165 }
166
perf_session__delete(struct perf_session * session)167 void perf_session__delete(struct perf_session *session)
168 {
169 perf_session__destroy_kernel_maps(session);
170 perf_session__delete_dead_threads(session);
171 perf_session__delete_threads(session);
172 perf_session_env__delete(&session->header.env);
173 machines__exit(&session->machines);
174 if (session->file)
175 perf_data_file__close(session->file);
176 free(session);
177 }
178
process_event_synth_tracing_data_stub(struct perf_tool * tool __maybe_unused,union perf_event * event __maybe_unused,struct perf_session * session __maybe_unused)179 static int process_event_synth_tracing_data_stub(struct perf_tool *tool
180 __maybe_unused,
181 union perf_event *event
182 __maybe_unused,
183 struct perf_session *session
184 __maybe_unused)
185 {
186 dump_printf(": unhandled!\n");
187 return 0;
188 }
189
process_event_synth_attr_stub(struct perf_tool * tool __maybe_unused,union perf_event * event __maybe_unused,struct perf_evlist ** pevlist __maybe_unused)190 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
191 union perf_event *event __maybe_unused,
192 struct perf_evlist **pevlist
193 __maybe_unused)
194 {
195 dump_printf(": unhandled!\n");
196 return 0;
197 }
198
process_event_sample_stub(struct perf_tool * tool __maybe_unused,union perf_event * event __maybe_unused,struct perf_sample * sample __maybe_unused,struct perf_evsel * evsel __maybe_unused,struct machine * machine __maybe_unused)199 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
200 union perf_event *event __maybe_unused,
201 struct perf_sample *sample __maybe_unused,
202 struct perf_evsel *evsel __maybe_unused,
203 struct machine *machine __maybe_unused)
204 {
205 dump_printf(": unhandled!\n");
206 return 0;
207 }
208
process_event_stub(struct perf_tool * tool __maybe_unused,union perf_event * event __maybe_unused,struct perf_sample * sample __maybe_unused,struct machine * machine __maybe_unused)209 static int process_event_stub(struct perf_tool *tool __maybe_unused,
210 union perf_event *event __maybe_unused,
211 struct perf_sample *sample __maybe_unused,
212 struct machine *machine __maybe_unused)
213 {
214 dump_printf(": unhandled!\n");
215 return 0;
216 }
217
process_finished_round_stub(struct perf_tool * tool __maybe_unused,union perf_event * event __maybe_unused,struct perf_session * perf_session __maybe_unused)218 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
219 union perf_event *event __maybe_unused,
220 struct perf_session *perf_session
221 __maybe_unused)
222 {
223 dump_printf(": unhandled!\n");
224 return 0;
225 }
226
227 static int process_finished_round(struct perf_tool *tool,
228 union perf_event *event,
229 struct perf_session *session);
230
perf_tool__fill_defaults(struct perf_tool * tool)231 void perf_tool__fill_defaults(struct perf_tool *tool)
232 {
233 if (tool->sample == NULL)
234 tool->sample = process_event_sample_stub;
235 if (tool->mmap == NULL)
236 tool->mmap = process_event_stub;
237 if (tool->mmap2 == NULL)
238 tool->mmap2 = process_event_stub;
239 if (tool->comm == NULL)
240 tool->comm = process_event_stub;
241 if (tool->fork == NULL)
242 tool->fork = process_event_stub;
243 if (tool->exit == NULL)
244 tool->exit = process_event_stub;
245 if (tool->lost == NULL)
246 tool->lost = perf_event__process_lost;
247 if (tool->read == NULL)
248 tool->read = process_event_sample_stub;
249 if (tool->throttle == NULL)
250 tool->throttle = process_event_stub;
251 if (tool->unthrottle == NULL)
252 tool->unthrottle = process_event_stub;
253 if (tool->attr == NULL)
254 tool->attr = process_event_synth_attr_stub;
255 if (tool->tracing_data == NULL)
256 tool->tracing_data = process_event_synth_tracing_data_stub;
257 if (tool->build_id == NULL)
258 tool->build_id = process_finished_round_stub;
259 if (tool->finished_round == NULL) {
260 if (tool->ordered_events)
261 tool->finished_round = process_finished_round;
262 else
263 tool->finished_round = process_finished_round_stub;
264 }
265 }
266
swap_sample_id_all(union perf_event * event,void * data)267 static void swap_sample_id_all(union perf_event *event, void *data)
268 {
269 void *end = (void *) event + event->header.size;
270 int size = end - data;
271
272 BUG_ON(size % sizeof(u64));
273 mem_bswap_64(data, size);
274 }
275
perf_event__all64_swap(union perf_event * event,bool sample_id_all __maybe_unused)276 static void perf_event__all64_swap(union perf_event *event,
277 bool sample_id_all __maybe_unused)
278 {
279 struct perf_event_header *hdr = &event->header;
280 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
281 }
282
perf_event__comm_swap(union perf_event * event,bool sample_id_all)283 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
284 {
285 event->comm.pid = bswap_32(event->comm.pid);
286 event->comm.tid = bswap_32(event->comm.tid);
287
288 if (sample_id_all) {
289 void *data = &event->comm.comm;
290
291 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
292 swap_sample_id_all(event, data);
293 }
294 }
295
perf_event__mmap_swap(union perf_event * event,bool sample_id_all)296 static void perf_event__mmap_swap(union perf_event *event,
297 bool sample_id_all)
298 {
299 event->mmap.pid = bswap_32(event->mmap.pid);
300 event->mmap.tid = bswap_32(event->mmap.tid);
301 event->mmap.start = bswap_64(event->mmap.start);
302 event->mmap.len = bswap_64(event->mmap.len);
303 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
304
305 if (sample_id_all) {
306 void *data = &event->mmap.filename;
307
308 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
309 swap_sample_id_all(event, data);
310 }
311 }
312
perf_event__mmap2_swap(union perf_event * event,bool sample_id_all)313 static void perf_event__mmap2_swap(union perf_event *event,
314 bool sample_id_all)
315 {
316 event->mmap2.pid = bswap_32(event->mmap2.pid);
317 event->mmap2.tid = bswap_32(event->mmap2.tid);
318 event->mmap2.start = bswap_64(event->mmap2.start);
319 event->mmap2.len = bswap_64(event->mmap2.len);
320 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
321 event->mmap2.maj = bswap_32(event->mmap2.maj);
322 event->mmap2.min = bswap_32(event->mmap2.min);
323 event->mmap2.ino = bswap_64(event->mmap2.ino);
324
325 if (sample_id_all) {
326 void *data = &event->mmap2.filename;
327
328 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
329 swap_sample_id_all(event, data);
330 }
331 }
perf_event__task_swap(union perf_event * event,bool sample_id_all)332 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
333 {
334 event->fork.pid = bswap_32(event->fork.pid);
335 event->fork.tid = bswap_32(event->fork.tid);
336 event->fork.ppid = bswap_32(event->fork.ppid);
337 event->fork.ptid = bswap_32(event->fork.ptid);
338 event->fork.time = bswap_64(event->fork.time);
339
340 if (sample_id_all)
341 swap_sample_id_all(event, &event->fork + 1);
342 }
343
perf_event__read_swap(union perf_event * event,bool sample_id_all)344 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
345 {
346 event->read.pid = bswap_32(event->read.pid);
347 event->read.tid = bswap_32(event->read.tid);
348 event->read.value = bswap_64(event->read.value);
349 event->read.time_enabled = bswap_64(event->read.time_enabled);
350 event->read.time_running = bswap_64(event->read.time_running);
351 event->read.id = bswap_64(event->read.id);
352
353 if (sample_id_all)
354 swap_sample_id_all(event, &event->read + 1);
355 }
356
perf_event__throttle_swap(union perf_event * event,bool sample_id_all)357 static void perf_event__throttle_swap(union perf_event *event,
358 bool sample_id_all)
359 {
360 event->throttle.time = bswap_64(event->throttle.time);
361 event->throttle.id = bswap_64(event->throttle.id);
362 event->throttle.stream_id = bswap_64(event->throttle.stream_id);
363
364 if (sample_id_all)
365 swap_sample_id_all(event, &event->throttle + 1);
366 }
367
revbyte(u8 b)368 static u8 revbyte(u8 b)
369 {
370 int rev = (b >> 4) | ((b & 0xf) << 4);
371 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
372 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
373 return (u8) rev;
374 }
375
376 /*
377 * XXX this is hack in attempt to carry flags bitfield
378 * throught endian village. ABI says:
379 *
380 * Bit-fields are allocated from right to left (least to most significant)
381 * on little-endian implementations and from left to right (most to least
382 * significant) on big-endian implementations.
383 *
384 * The above seems to be byte specific, so we need to reverse each
385 * byte of the bitfield. 'Internet' also says this might be implementation
386 * specific and we probably need proper fix and carry perf_event_attr
387 * bitfield flags in separate data file FEAT_ section. Thought this seems
388 * to work for now.
389 */
swap_bitfield(u8 * p,unsigned len)390 static void swap_bitfield(u8 *p, unsigned len)
391 {
392 unsigned i;
393
394 for (i = 0; i < len; i++) {
395 *p = revbyte(*p);
396 p++;
397 }
398 }
399
400 /* exported for swapping attributes in file header */
perf_event__attr_swap(struct perf_event_attr * attr)401 void perf_event__attr_swap(struct perf_event_attr *attr)
402 {
403 attr->type = bswap_32(attr->type);
404 attr->size = bswap_32(attr->size);
405 attr->config = bswap_64(attr->config);
406 attr->sample_period = bswap_64(attr->sample_period);
407 attr->sample_type = bswap_64(attr->sample_type);
408 attr->read_format = bswap_64(attr->read_format);
409 attr->wakeup_events = bswap_32(attr->wakeup_events);
410 attr->bp_type = bswap_32(attr->bp_type);
411 attr->bp_addr = bswap_64(attr->bp_addr);
412 attr->bp_len = bswap_64(attr->bp_len);
413 attr->branch_sample_type = bswap_64(attr->branch_sample_type);
414 attr->sample_regs_user = bswap_64(attr->sample_regs_user);
415 attr->sample_stack_user = bswap_32(attr->sample_stack_user);
416
417 swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64));
418 }
419
perf_event__hdr_attr_swap(union perf_event * event,bool sample_id_all __maybe_unused)420 static void perf_event__hdr_attr_swap(union perf_event *event,
421 bool sample_id_all __maybe_unused)
422 {
423 size_t size;
424
425 perf_event__attr_swap(&event->attr.attr);
426
427 size = event->header.size;
428 size -= (void *)&event->attr.id - (void *)event;
429 mem_bswap_64(event->attr.id, size);
430 }
431
perf_event__event_type_swap(union perf_event * event,bool sample_id_all __maybe_unused)432 static void perf_event__event_type_swap(union perf_event *event,
433 bool sample_id_all __maybe_unused)
434 {
435 event->event_type.event_type.event_id =
436 bswap_64(event->event_type.event_type.event_id);
437 }
438
perf_event__tracing_data_swap(union perf_event * event,bool sample_id_all __maybe_unused)439 static void perf_event__tracing_data_swap(union perf_event *event,
440 bool sample_id_all __maybe_unused)
441 {
442 event->tracing_data.size = bswap_32(event->tracing_data.size);
443 }
444
445 typedef void (*perf_event__swap_op)(union perf_event *event,
446 bool sample_id_all);
447
448 static perf_event__swap_op perf_event__swap_ops[] = {
449 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
450 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap,
451 [PERF_RECORD_COMM] = perf_event__comm_swap,
452 [PERF_RECORD_FORK] = perf_event__task_swap,
453 [PERF_RECORD_EXIT] = perf_event__task_swap,
454 [PERF_RECORD_LOST] = perf_event__all64_swap,
455 [PERF_RECORD_READ] = perf_event__read_swap,
456 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap,
457 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap,
458 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
459 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
460 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
461 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
462 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
463 [PERF_RECORD_HEADER_MAX] = NULL,
464 };
465
466 /*
467 * When perf record finishes a pass on every buffers, it records this pseudo
468 * event.
469 * We record the max timestamp t found in the pass n.
470 * Assuming these timestamps are monotonic across cpus, we know that if
471 * a buffer still has events with timestamps below t, they will be all
472 * available and then read in the pass n + 1.
473 * Hence when we start to read the pass n + 2, we can safely flush every
474 * events with timestamps below t.
475 *
476 * ============ PASS n =================
477 * CPU 0 | CPU 1
478 * |
479 * cnt1 timestamps | cnt2 timestamps
480 * 1 | 2
481 * 2 | 3
482 * - | 4 <--- max recorded
483 *
484 * ============ PASS n + 1 ==============
485 * CPU 0 | CPU 1
486 * |
487 * cnt1 timestamps | cnt2 timestamps
488 * 3 | 5
489 * 4 | 6
490 * 5 | 7 <---- max recorded
491 *
492 * Flush every events below timestamp 4
493 *
494 * ============ PASS n + 2 ==============
495 * CPU 0 | CPU 1
496 * |
497 * cnt1 timestamps | cnt2 timestamps
498 * 6 | 8
499 * 7 | 9
500 * - | 10
501 *
502 * Flush every events below timestamp 7
503 * etc...
504 */
process_finished_round(struct perf_tool * tool,union perf_event * event __maybe_unused,struct perf_session * session)505 static int process_finished_round(struct perf_tool *tool,
506 union perf_event *event __maybe_unused,
507 struct perf_session *session)
508 {
509 return ordered_events__flush(session, tool, OE_FLUSH__ROUND);
510 }
511
perf_session_queue_event(struct perf_session * s,union perf_event * event,struct perf_tool * tool,struct perf_sample * sample,u64 file_offset)512 int perf_session_queue_event(struct perf_session *s, union perf_event *event,
513 struct perf_tool *tool, struct perf_sample *sample,
514 u64 file_offset)
515 {
516 struct ordered_events *oe = &s->ordered_events;
517 u64 timestamp = sample->time;
518 struct ordered_event *new;
519
520 if (!timestamp || timestamp == ~0ULL)
521 return -ETIME;
522
523 if (timestamp < oe->last_flush) {
524 pr_oe_time(timestamp, "out of order event\n");
525 pr_oe_time(oe->last_flush, "last flush, last_flush_type %d\n",
526 oe->last_flush_type);
527
528 s->stats.nr_unordered_events++;
529 }
530
531 new = ordered_events__new(oe, timestamp, event);
532 if (!new) {
533 ordered_events__flush(s, tool, OE_FLUSH__HALF);
534 new = ordered_events__new(oe, timestamp, event);
535 }
536
537 if (!new)
538 return -ENOMEM;
539
540 new->file_offset = file_offset;
541 return 0;
542 }
543
callchain__printf(struct perf_sample * sample)544 static void callchain__printf(struct perf_sample *sample)
545 {
546 unsigned int i;
547
548 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr);
549
550 for (i = 0; i < sample->callchain->nr; i++)
551 printf("..... %2d: %016" PRIx64 "\n",
552 i, sample->callchain->ips[i]);
553 }
554
branch_stack__printf(struct perf_sample * sample)555 static void branch_stack__printf(struct perf_sample *sample)
556 {
557 uint64_t i;
558
559 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
560
561 for (i = 0; i < sample->branch_stack->nr; i++)
562 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n",
563 i, sample->branch_stack->entries[i].from,
564 sample->branch_stack->entries[i].to);
565 }
566
regs_dump__printf(u64 mask,u64 * regs)567 static void regs_dump__printf(u64 mask, u64 *regs)
568 {
569 unsigned rid, i = 0;
570
571 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
572 u64 val = regs[i++];
573
574 printf(".... %-5s 0x%" PRIx64 "\n",
575 perf_reg_name(rid), val);
576 }
577 }
578
regs_user__printf(struct perf_sample * sample)579 static void regs_user__printf(struct perf_sample *sample)
580 {
581 struct regs_dump *user_regs = &sample->user_regs;
582
583 if (user_regs->regs) {
584 u64 mask = user_regs->mask;
585 printf("... user regs: mask 0x%" PRIx64 "\n", mask);
586 regs_dump__printf(mask, user_regs->regs);
587 }
588 }
589
stack_user__printf(struct stack_dump * dump)590 static void stack_user__printf(struct stack_dump *dump)
591 {
592 printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
593 dump->size, dump->offset);
594 }
595
perf_session__print_tstamp(struct perf_session * session,union perf_event * event,struct perf_sample * sample)596 static void perf_session__print_tstamp(struct perf_session *session,
597 union perf_event *event,
598 struct perf_sample *sample)
599 {
600 u64 sample_type = __perf_evlist__combined_sample_type(session->evlist);
601
602 if (event->header.type != PERF_RECORD_SAMPLE &&
603 !perf_evlist__sample_id_all(session->evlist)) {
604 fputs("-1 -1 ", stdout);
605 return;
606 }
607
608 if ((sample_type & PERF_SAMPLE_CPU))
609 printf("%u ", sample->cpu);
610
611 if (sample_type & PERF_SAMPLE_TIME)
612 printf("%" PRIu64 " ", sample->time);
613 }
614
sample_read__printf(struct perf_sample * sample,u64 read_format)615 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
616 {
617 printf("... sample_read:\n");
618
619 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
620 printf("...... time enabled %016" PRIx64 "\n",
621 sample->read.time_enabled);
622
623 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
624 printf("...... time running %016" PRIx64 "\n",
625 sample->read.time_running);
626
627 if (read_format & PERF_FORMAT_GROUP) {
628 u64 i;
629
630 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
631
632 for (i = 0; i < sample->read.group.nr; i++) {
633 struct sample_read_value *value;
634
635 value = &sample->read.group.values[i];
636 printf("..... id %016" PRIx64
637 ", value %016" PRIx64 "\n",
638 value->id, value->value);
639 }
640 } else
641 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
642 sample->read.one.id, sample->read.one.value);
643 }
644
dump_event(struct perf_session * session,union perf_event * event,u64 file_offset,struct perf_sample * sample)645 static void dump_event(struct perf_session *session, union perf_event *event,
646 u64 file_offset, struct perf_sample *sample)
647 {
648 if (!dump_trace)
649 return;
650
651 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
652 file_offset, event->header.size, event->header.type);
653
654 trace_event(event);
655
656 if (sample)
657 perf_session__print_tstamp(session, event, sample);
658
659 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
660 event->header.size, perf_event__name(event->header.type));
661 }
662
dump_sample(struct perf_evsel * evsel,union perf_event * event,struct perf_sample * sample)663 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
664 struct perf_sample *sample)
665 {
666 u64 sample_type;
667
668 if (!dump_trace)
669 return;
670
671 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
672 event->header.misc, sample->pid, sample->tid, sample->ip,
673 sample->period, sample->addr);
674
675 sample_type = evsel->attr.sample_type;
676
677 if (sample_type & PERF_SAMPLE_CALLCHAIN)
678 callchain__printf(sample);
679
680 if (sample_type & PERF_SAMPLE_BRANCH_STACK)
681 branch_stack__printf(sample);
682
683 if (sample_type & PERF_SAMPLE_REGS_USER)
684 regs_user__printf(sample);
685
686 if (sample_type & PERF_SAMPLE_STACK_USER)
687 stack_user__printf(&sample->user_stack);
688
689 if (sample_type & PERF_SAMPLE_WEIGHT)
690 printf("... weight: %" PRIu64 "\n", sample->weight);
691
692 if (sample_type & PERF_SAMPLE_DATA_SRC)
693 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
694
695 if (sample_type & PERF_SAMPLE_TRANSACTION)
696 printf("... transaction: %" PRIx64 "\n", sample->transaction);
697
698 if (sample_type & PERF_SAMPLE_READ)
699 sample_read__printf(sample, evsel->attr.read_format);
700 }
701
702 static struct machine *
perf_session__find_machine_for_cpumode(struct perf_session * session,union perf_event * event,struct perf_sample * sample)703 perf_session__find_machine_for_cpumode(struct perf_session *session,
704 union perf_event *event,
705 struct perf_sample *sample)
706 {
707 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
708 struct machine *machine;
709
710 if (perf_guest &&
711 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
712 (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
713 u32 pid;
714
715 if (event->header.type == PERF_RECORD_MMAP
716 || event->header.type == PERF_RECORD_MMAP2)
717 pid = event->mmap.pid;
718 else
719 pid = sample->pid;
720
721 machine = perf_session__find_machine(session, pid);
722 if (!machine)
723 machine = perf_session__findnew_machine(session,
724 DEFAULT_GUEST_KERNEL_ID);
725 return machine;
726 }
727
728 return &session->machines.host;
729 }
730
deliver_sample_value(struct perf_session * session,struct perf_tool * tool,union perf_event * event,struct perf_sample * sample,struct sample_read_value * v,struct machine * machine)731 static int deliver_sample_value(struct perf_session *session,
732 struct perf_tool *tool,
733 union perf_event *event,
734 struct perf_sample *sample,
735 struct sample_read_value *v,
736 struct machine *machine)
737 {
738 struct perf_sample_id *sid;
739
740 sid = perf_evlist__id2sid(session->evlist, v->id);
741 if (sid) {
742 sample->id = v->id;
743 sample->period = v->value - sid->period;
744 sid->period = v->value;
745 }
746
747 if (!sid || sid->evsel == NULL) {
748 ++session->stats.nr_unknown_id;
749 return 0;
750 }
751
752 return tool->sample(tool, event, sample, sid->evsel, machine);
753 }
754
deliver_sample_group(struct perf_session * session,struct perf_tool * tool,union perf_event * event,struct perf_sample * sample,struct machine * machine)755 static int deliver_sample_group(struct perf_session *session,
756 struct perf_tool *tool,
757 union perf_event *event,
758 struct perf_sample *sample,
759 struct machine *machine)
760 {
761 int ret = -EINVAL;
762 u64 i;
763
764 for (i = 0; i < sample->read.group.nr; i++) {
765 ret = deliver_sample_value(session, tool, event, sample,
766 &sample->read.group.values[i],
767 machine);
768 if (ret)
769 break;
770 }
771
772 return ret;
773 }
774
775 static int
perf_session__deliver_sample(struct perf_session * session,struct perf_tool * tool,union perf_event * event,struct perf_sample * sample,struct perf_evsel * evsel,struct machine * machine)776 perf_session__deliver_sample(struct perf_session *session,
777 struct perf_tool *tool,
778 union perf_event *event,
779 struct perf_sample *sample,
780 struct perf_evsel *evsel,
781 struct machine *machine)
782 {
783 /* We know evsel != NULL. */
784 u64 sample_type = evsel->attr.sample_type;
785 u64 read_format = evsel->attr.read_format;
786
787 /* Standard sample delievery. */
788 if (!(sample_type & PERF_SAMPLE_READ))
789 return tool->sample(tool, event, sample, evsel, machine);
790
791 /* For PERF_SAMPLE_READ we have either single or group mode. */
792 if (read_format & PERF_FORMAT_GROUP)
793 return deliver_sample_group(session, tool, event, sample,
794 machine);
795 else
796 return deliver_sample_value(session, tool, event, sample,
797 &sample->read.one, machine);
798 }
799
perf_session__deliver_event(struct perf_session * session,union perf_event * event,struct perf_sample * sample,struct perf_tool * tool,u64 file_offset)800 int perf_session__deliver_event(struct perf_session *session,
801 union perf_event *event,
802 struct perf_sample *sample,
803 struct perf_tool *tool, u64 file_offset)
804 {
805 struct perf_evsel *evsel;
806 struct machine *machine;
807
808 dump_event(session, event, file_offset, sample);
809
810 evsel = perf_evlist__id2evsel(session->evlist, sample->id);
811
812 machine = perf_session__find_machine_for_cpumode(session, event,
813 sample);
814
815 switch (event->header.type) {
816 case PERF_RECORD_SAMPLE:
817 dump_sample(evsel, event, sample);
818 if (evsel == NULL) {
819 ++session->stats.nr_unknown_id;
820 return 0;
821 }
822 if (machine == NULL) {
823 ++session->stats.nr_unprocessable_samples;
824 return 0;
825 }
826 return perf_session__deliver_sample(session, tool, event,
827 sample, evsel, machine);
828 case PERF_RECORD_MMAP:
829 return tool->mmap(tool, event, sample, machine);
830 case PERF_RECORD_MMAP2:
831 return tool->mmap2(tool, event, sample, machine);
832 case PERF_RECORD_COMM:
833 return tool->comm(tool, event, sample, machine);
834 case PERF_RECORD_FORK:
835 return tool->fork(tool, event, sample, machine);
836 case PERF_RECORD_EXIT:
837 return tool->exit(tool, event, sample, machine);
838 case PERF_RECORD_LOST:
839 if (tool->lost == perf_event__process_lost)
840 session->stats.total_lost += event->lost.lost;
841 return tool->lost(tool, event, sample, machine);
842 case PERF_RECORD_READ:
843 return tool->read(tool, event, sample, evsel, machine);
844 case PERF_RECORD_THROTTLE:
845 return tool->throttle(tool, event, sample, machine);
846 case PERF_RECORD_UNTHROTTLE:
847 return tool->unthrottle(tool, event, sample, machine);
848 default:
849 ++session->stats.nr_unknown_events;
850 return -1;
851 }
852 }
853
perf_session__process_user_event(struct perf_session * session,union perf_event * event,struct perf_tool * tool,u64 file_offset)854 static s64 perf_session__process_user_event(struct perf_session *session,
855 union perf_event *event,
856 struct perf_tool *tool,
857 u64 file_offset)
858 {
859 int fd = perf_data_file__fd(session->file);
860 int err;
861
862 dump_event(session, event, file_offset, NULL);
863
864 /* These events are processed right away */
865 switch (event->header.type) {
866 case PERF_RECORD_HEADER_ATTR:
867 err = tool->attr(tool, event, &session->evlist);
868 if (err == 0) {
869 perf_session__set_id_hdr_size(session);
870 perf_session__set_comm_exec(session);
871 }
872 return err;
873 case PERF_RECORD_HEADER_EVENT_TYPE:
874 /*
875 * Depreceated, but we need to handle it for sake
876 * of old data files create in pipe mode.
877 */
878 return 0;
879 case PERF_RECORD_HEADER_TRACING_DATA:
880 /* setup for reading amidst mmap */
881 lseek(fd, file_offset, SEEK_SET);
882 return tool->tracing_data(tool, event, session);
883 case PERF_RECORD_HEADER_BUILD_ID:
884 return tool->build_id(tool, event, session);
885 case PERF_RECORD_FINISHED_ROUND:
886 return tool->finished_round(tool, event, session);
887 default:
888 return -EINVAL;
889 }
890 }
891
event_swap(union perf_event * event,bool sample_id_all)892 static void event_swap(union perf_event *event, bool sample_id_all)
893 {
894 perf_event__swap_op swap;
895
896 swap = perf_event__swap_ops[event->header.type];
897 if (swap)
898 swap(event, sample_id_all);
899 }
900
perf_session__peek_event(struct perf_session * session,off_t file_offset,void * buf,size_t buf_sz,union perf_event ** event_ptr,struct perf_sample * sample)901 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
902 void *buf, size_t buf_sz,
903 union perf_event **event_ptr,
904 struct perf_sample *sample)
905 {
906 union perf_event *event;
907 size_t hdr_sz, rest;
908 int fd;
909
910 if (session->one_mmap && !session->header.needs_swap) {
911 event = file_offset - session->one_mmap_offset +
912 session->one_mmap_addr;
913 goto out_parse_sample;
914 }
915
916 if (perf_data_file__is_pipe(session->file))
917 return -1;
918
919 fd = perf_data_file__fd(session->file);
920 hdr_sz = sizeof(struct perf_event_header);
921
922 if (buf_sz < hdr_sz)
923 return -1;
924
925 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
926 readn(fd, &buf, hdr_sz) != (ssize_t)hdr_sz)
927 return -1;
928
929 event = (union perf_event *)buf;
930
931 if (session->header.needs_swap)
932 perf_event_header__bswap(&event->header);
933
934 if (event->header.size < hdr_sz)
935 return -1;
936
937 rest = event->header.size - hdr_sz;
938
939 if (readn(fd, &buf, rest) != (ssize_t)rest)
940 return -1;
941
942 if (session->header.needs_swap)
943 event_swap(event, perf_evlist__sample_id_all(session->evlist));
944
945 out_parse_sample:
946
947 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
948 perf_evlist__parse_sample(session->evlist, event, sample))
949 return -1;
950
951 *event_ptr = event;
952
953 return 0;
954 }
955
perf_session__process_event(struct perf_session * session,union perf_event * event,struct perf_tool * tool,u64 file_offset)956 static s64 perf_session__process_event(struct perf_session *session,
957 union perf_event *event,
958 struct perf_tool *tool,
959 u64 file_offset)
960 {
961 struct perf_sample sample;
962 int ret;
963
964 if (session->header.needs_swap)
965 event_swap(event, perf_evlist__sample_id_all(session->evlist));
966
967 if (event->header.type >= PERF_RECORD_HEADER_MAX)
968 return -EINVAL;
969
970 events_stats__inc(&session->stats, event->header.type);
971
972 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
973 return perf_session__process_user_event(session, event, tool, file_offset);
974
975 /*
976 * For all kernel events we get the sample data
977 */
978 ret = perf_evlist__parse_sample(session->evlist, event, &sample);
979 if (ret)
980 return ret;
981
982 if (tool->ordered_events) {
983 ret = perf_session_queue_event(session, event, tool, &sample,
984 file_offset);
985 if (ret != -ETIME)
986 return ret;
987 }
988
989 return perf_session__deliver_event(session, event, &sample, tool,
990 file_offset);
991 }
992
perf_event_header__bswap(struct perf_event_header * hdr)993 void perf_event_header__bswap(struct perf_event_header *hdr)
994 {
995 hdr->type = bswap_32(hdr->type);
996 hdr->misc = bswap_16(hdr->misc);
997 hdr->size = bswap_16(hdr->size);
998 }
999
perf_session__findnew(struct perf_session * session,pid_t pid)1000 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1001 {
1002 return machine__findnew_thread(&session->machines.host, -1, pid);
1003 }
1004
perf_session__register_idle_thread(struct perf_session * session)1005 static struct thread *perf_session__register_idle_thread(struct perf_session *session)
1006 {
1007 struct thread *thread;
1008
1009 thread = machine__findnew_thread(&session->machines.host, 0, 0);
1010 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1011 pr_err("problem inserting idle task.\n");
1012 thread = NULL;
1013 }
1014
1015 return thread;
1016 }
1017
perf_session__warn_about_errors(const struct perf_session * session,const struct perf_tool * tool)1018 static void perf_session__warn_about_errors(const struct perf_session *session,
1019 const struct perf_tool *tool)
1020 {
1021 if (tool->lost == perf_event__process_lost &&
1022 session->stats.nr_events[PERF_RECORD_LOST] != 0) {
1023 ui__warning("Processed %d events and lost %d chunks!\n\n"
1024 "Check IO/CPU overload!\n\n",
1025 session->stats.nr_events[0],
1026 session->stats.nr_events[PERF_RECORD_LOST]);
1027 }
1028
1029 if (session->stats.nr_unknown_events != 0) {
1030 ui__warning("Found %u unknown events!\n\n"
1031 "Is this an older tool processing a perf.data "
1032 "file generated by a more recent tool?\n\n"
1033 "If that is not the case, consider "
1034 "reporting to linux-kernel@vger.kernel.org.\n\n",
1035 session->stats.nr_unknown_events);
1036 }
1037
1038 if (session->stats.nr_unknown_id != 0) {
1039 ui__warning("%u samples with id not present in the header\n",
1040 session->stats.nr_unknown_id);
1041 }
1042
1043 if (session->stats.nr_invalid_chains != 0) {
1044 ui__warning("Found invalid callchains!\n\n"
1045 "%u out of %u events were discarded for this reason.\n\n"
1046 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1047 session->stats.nr_invalid_chains,
1048 session->stats.nr_events[PERF_RECORD_SAMPLE]);
1049 }
1050
1051 if (session->stats.nr_unprocessable_samples != 0) {
1052 ui__warning("%u unprocessable samples recorded.\n"
1053 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1054 session->stats.nr_unprocessable_samples);
1055 }
1056
1057 if (session->stats.nr_unordered_events != 0)
1058 ui__warning("%u out of order events recorded.\n", session->stats.nr_unordered_events);
1059 }
1060
1061 volatile int session_done;
1062
__perf_session__process_pipe_events(struct perf_session * session,struct perf_tool * tool)1063 static int __perf_session__process_pipe_events(struct perf_session *session,
1064 struct perf_tool *tool)
1065 {
1066 int fd = perf_data_file__fd(session->file);
1067 union perf_event *event;
1068 uint32_t size, cur_size = 0;
1069 void *buf = NULL;
1070 s64 skip = 0;
1071 u64 head;
1072 ssize_t err;
1073 void *p;
1074
1075 perf_tool__fill_defaults(tool);
1076
1077 head = 0;
1078 cur_size = sizeof(union perf_event);
1079
1080 buf = malloc(cur_size);
1081 if (!buf)
1082 return -errno;
1083 more:
1084 event = buf;
1085 err = readn(fd, event, sizeof(struct perf_event_header));
1086 if (err <= 0) {
1087 if (err == 0)
1088 goto done;
1089
1090 pr_err("failed to read event header\n");
1091 goto out_err;
1092 }
1093
1094 if (session->header.needs_swap)
1095 perf_event_header__bswap(&event->header);
1096
1097 size = event->header.size;
1098 if (size < sizeof(struct perf_event_header)) {
1099 pr_err("bad event header size\n");
1100 goto out_err;
1101 }
1102
1103 if (size > cur_size) {
1104 void *new = realloc(buf, size);
1105 if (!new) {
1106 pr_err("failed to allocate memory to read event\n");
1107 goto out_err;
1108 }
1109 buf = new;
1110 cur_size = size;
1111 event = buf;
1112 }
1113 p = event;
1114 p += sizeof(struct perf_event_header);
1115
1116 if (size - sizeof(struct perf_event_header)) {
1117 err = readn(fd, p, size - sizeof(struct perf_event_header));
1118 if (err <= 0) {
1119 if (err == 0) {
1120 pr_err("unexpected end of event stream\n");
1121 goto done;
1122 }
1123
1124 pr_err("failed to read event data\n");
1125 goto out_err;
1126 }
1127 }
1128
1129 if ((skip = perf_session__process_event(session, event, tool, head)) < 0) {
1130 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1131 head, event->header.size, event->header.type);
1132 err = -EINVAL;
1133 goto out_err;
1134 }
1135
1136 head += size;
1137
1138 if (skip > 0)
1139 head += skip;
1140
1141 if (!session_done())
1142 goto more;
1143 done:
1144 /* do the final flush for ordered samples */
1145 err = ordered_events__flush(session, tool, OE_FLUSH__FINAL);
1146 out_err:
1147 free(buf);
1148 perf_session__warn_about_errors(session, tool);
1149 ordered_events__free(&session->ordered_events);
1150 return err;
1151 }
1152
1153 static union perf_event *
fetch_mmaped_event(struct perf_session * session,u64 head,size_t mmap_size,char * buf)1154 fetch_mmaped_event(struct perf_session *session,
1155 u64 head, size_t mmap_size, char *buf)
1156 {
1157 union perf_event *event;
1158
1159 /*
1160 * Ensure we have enough space remaining to read
1161 * the size of the event in the headers.
1162 */
1163 if (head + sizeof(event->header) > mmap_size)
1164 return NULL;
1165
1166 event = (union perf_event *)(buf + head);
1167
1168 if (session->header.needs_swap)
1169 perf_event_header__bswap(&event->header);
1170
1171 if (head + event->header.size > mmap_size) {
1172 /* We're not fetching the event so swap back again */
1173 if (session->header.needs_swap)
1174 perf_event_header__bswap(&event->header);
1175 return NULL;
1176 }
1177
1178 return event;
1179 }
1180
1181 /*
1182 * On 64bit we can mmap the data file in one go. No need for tiny mmap
1183 * slices. On 32bit we use 32MB.
1184 */
1185 #if BITS_PER_LONG == 64
1186 #define MMAP_SIZE ULLONG_MAX
1187 #define NUM_MMAPS 1
1188 #else
1189 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1190 #define NUM_MMAPS 128
1191 #endif
1192
__perf_session__process_events(struct perf_session * session,u64 data_offset,u64 data_size,u64 file_size,struct perf_tool * tool)1193 int __perf_session__process_events(struct perf_session *session,
1194 u64 data_offset, u64 data_size,
1195 u64 file_size, struct perf_tool *tool)
1196 {
1197 int fd = perf_data_file__fd(session->file);
1198 u64 head, page_offset, file_offset, file_pos, size;
1199 int err, mmap_prot, mmap_flags, map_idx = 0;
1200 size_t mmap_size;
1201 char *buf, *mmaps[NUM_MMAPS];
1202 union perf_event *event;
1203 struct ui_progress prog;
1204 s64 skip;
1205
1206 perf_tool__fill_defaults(tool);
1207
1208 page_offset = page_size * (data_offset / page_size);
1209 file_offset = page_offset;
1210 head = data_offset - page_offset;
1211
1212 if (data_size && (data_offset + data_size < file_size))
1213 file_size = data_offset + data_size;
1214
1215 ui_progress__init(&prog, file_size, "Processing events...");
1216
1217 mmap_size = MMAP_SIZE;
1218 if (mmap_size > file_size) {
1219 mmap_size = file_size;
1220 session->one_mmap = true;
1221 }
1222
1223 memset(mmaps, 0, sizeof(mmaps));
1224
1225 mmap_prot = PROT_READ;
1226 mmap_flags = MAP_SHARED;
1227
1228 if (session->header.needs_swap) {
1229 mmap_prot |= PROT_WRITE;
1230 mmap_flags = MAP_PRIVATE;
1231 }
1232 remap:
1233 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1234 file_offset);
1235 if (buf == MAP_FAILED) {
1236 pr_err("failed to mmap file\n");
1237 err = -errno;
1238 goto out_err;
1239 }
1240 mmaps[map_idx] = buf;
1241 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1242 file_pos = file_offset + head;
1243 if (session->one_mmap) {
1244 session->one_mmap_addr = buf;
1245 session->one_mmap_offset = file_offset;
1246 }
1247
1248 more:
1249 event = fetch_mmaped_event(session, head, mmap_size, buf);
1250 if (!event) {
1251 if (mmaps[map_idx]) {
1252 munmap(mmaps[map_idx], mmap_size);
1253 mmaps[map_idx] = NULL;
1254 }
1255
1256 page_offset = page_size * (head / page_size);
1257 file_offset += page_offset;
1258 head -= page_offset;
1259 goto remap;
1260 }
1261
1262 size = event->header.size;
1263
1264 if (size < sizeof(struct perf_event_header) ||
1265 (skip = perf_session__process_event(session, event, tool, file_pos))
1266 < 0) {
1267 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1268 file_offset + head, event->header.size,
1269 event->header.type);
1270 err = -EINVAL;
1271 goto out_err;
1272 }
1273
1274 if (skip)
1275 size += skip;
1276
1277 head += size;
1278 file_pos += size;
1279
1280 ui_progress__update(&prog, size);
1281
1282 if (session_done())
1283 goto out;
1284
1285 if (file_pos < file_size)
1286 goto more;
1287
1288 out:
1289 /* do the final flush for ordered samples */
1290 err = ordered_events__flush(session, tool, OE_FLUSH__FINAL);
1291 out_err:
1292 ui_progress__finish();
1293 perf_session__warn_about_errors(session, tool);
1294 ordered_events__free(&session->ordered_events);
1295 session->one_mmap = false;
1296 return err;
1297 }
1298
perf_session__process_events(struct perf_session * session,struct perf_tool * tool)1299 int perf_session__process_events(struct perf_session *session,
1300 struct perf_tool *tool)
1301 {
1302 u64 size = perf_data_file__size(session->file);
1303 int err;
1304
1305 if (perf_session__register_idle_thread(session) == NULL)
1306 return -ENOMEM;
1307
1308 if (!perf_data_file__is_pipe(session->file))
1309 err = __perf_session__process_events(session,
1310 session->header.data_offset,
1311 session->header.data_size,
1312 size, tool);
1313 else
1314 err = __perf_session__process_pipe_events(session, tool);
1315
1316 return err;
1317 }
1318
perf_session__has_traces(struct perf_session * session,const char * msg)1319 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1320 {
1321 struct perf_evsel *evsel;
1322
1323 evlist__for_each(session->evlist, evsel) {
1324 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1325 return true;
1326 }
1327
1328 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1329 return false;
1330 }
1331
maps__set_kallsyms_ref_reloc_sym(struct map ** maps,const char * symbol_name,u64 addr)1332 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1333 const char *symbol_name, u64 addr)
1334 {
1335 char *bracket;
1336 enum map_type i;
1337 struct ref_reloc_sym *ref;
1338
1339 ref = zalloc(sizeof(struct ref_reloc_sym));
1340 if (ref == NULL)
1341 return -ENOMEM;
1342
1343 ref->name = strdup(symbol_name);
1344 if (ref->name == NULL) {
1345 free(ref);
1346 return -ENOMEM;
1347 }
1348
1349 bracket = strchr(ref->name, ']');
1350 if (bracket)
1351 *bracket = '\0';
1352
1353 ref->addr = addr;
1354
1355 for (i = 0; i < MAP__NR_TYPES; ++i) {
1356 struct kmap *kmap = map__kmap(maps[i]);
1357 kmap->ref_reloc_sym = ref;
1358 }
1359
1360 return 0;
1361 }
1362
perf_session__fprintf_dsos(struct perf_session * session,FILE * fp)1363 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1364 {
1365 return machines__fprintf_dsos(&session->machines, fp);
1366 }
1367
perf_session__fprintf_dsos_buildid(struct perf_session * session,FILE * fp,bool (skip)(struct dso * dso,int parm),int parm)1368 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1369 bool (skip)(struct dso *dso, int parm), int parm)
1370 {
1371 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1372 }
1373
perf_session__fprintf_nr_events(struct perf_session * session,FILE * fp)1374 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1375 {
1376 size_t ret = fprintf(fp, "Aggregated stats:\n");
1377
1378 ret += events_stats__fprintf(&session->stats, fp);
1379 return ret;
1380 }
1381
perf_session__fprintf(struct perf_session * session,FILE * fp)1382 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1383 {
1384 /*
1385 * FIXME: Here we have to actually print all the machines in this
1386 * session, not just the host...
1387 */
1388 return machine__fprintf(&session->machines.host, fp);
1389 }
1390
perf_session__find_first_evtype(struct perf_session * session,unsigned int type)1391 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1392 unsigned int type)
1393 {
1394 struct perf_evsel *pos;
1395
1396 evlist__for_each(session->evlist, pos) {
1397 if (pos->attr.type == type)
1398 return pos;
1399 }
1400 return NULL;
1401 }
1402
perf_evsel__print_ip(struct perf_evsel * evsel,struct perf_sample * sample,struct addr_location * al,unsigned int print_opts,unsigned int stack_depth)1403 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
1404 struct addr_location *al,
1405 unsigned int print_opts, unsigned int stack_depth)
1406 {
1407 struct callchain_cursor_node *node;
1408 int print_ip = print_opts & PRINT_IP_OPT_IP;
1409 int print_sym = print_opts & PRINT_IP_OPT_SYM;
1410 int print_dso = print_opts & PRINT_IP_OPT_DSO;
1411 int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1412 int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1413 int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
1414 char s = print_oneline ? ' ' : '\t';
1415
1416 if (symbol_conf.use_callchain && sample->callchain) {
1417 struct addr_location node_al;
1418
1419 if (machine__resolve_callchain(al->machine, evsel, al->thread,
1420 sample, NULL, NULL,
1421 PERF_MAX_STACK_DEPTH) != 0) {
1422 if (verbose)
1423 error("Failed to resolve callchain. Skipping\n");
1424 return;
1425 }
1426 callchain_cursor_commit(&callchain_cursor);
1427
1428 if (print_symoffset)
1429 node_al = *al;
1430
1431 while (stack_depth) {
1432 u64 addr = 0;
1433
1434 node = callchain_cursor_current(&callchain_cursor);
1435 if (!node)
1436 break;
1437
1438 if (node->sym && node->sym->ignore)
1439 goto next;
1440
1441 if (print_ip)
1442 printf("%c%16" PRIx64, s, node->ip);
1443
1444 if (node->map)
1445 addr = node->map->map_ip(node->map, node->ip);
1446
1447 if (print_sym) {
1448 printf(" ");
1449 if (print_symoffset) {
1450 node_al.addr = addr;
1451 node_al.map = node->map;
1452 symbol__fprintf_symname_offs(node->sym, &node_al, stdout);
1453 } else
1454 symbol__fprintf_symname(node->sym, stdout);
1455 }
1456
1457 if (print_dso) {
1458 printf(" (");
1459 map__fprintf_dsoname(node->map, stdout);
1460 printf(")");
1461 }
1462
1463 if (print_srcline)
1464 map__fprintf_srcline(node->map, addr, "\n ",
1465 stdout);
1466
1467 if (!print_oneline)
1468 printf("\n");
1469
1470 stack_depth--;
1471 next:
1472 callchain_cursor_advance(&callchain_cursor);
1473 }
1474
1475 } else {
1476 if (al->sym && al->sym->ignore)
1477 return;
1478
1479 if (print_ip)
1480 printf("%16" PRIx64, sample->ip);
1481
1482 if (print_sym) {
1483 printf(" ");
1484 if (print_symoffset)
1485 symbol__fprintf_symname_offs(al->sym, al,
1486 stdout);
1487 else
1488 symbol__fprintf_symname(al->sym, stdout);
1489 }
1490
1491 if (print_dso) {
1492 printf(" (");
1493 map__fprintf_dsoname(al->map, stdout);
1494 printf(")");
1495 }
1496
1497 if (print_srcline)
1498 map__fprintf_srcline(al->map, al->addr, "\n ", stdout);
1499 }
1500 }
1501
perf_session__cpu_bitmap(struct perf_session * session,const char * cpu_list,unsigned long * cpu_bitmap)1502 int perf_session__cpu_bitmap(struct perf_session *session,
1503 const char *cpu_list, unsigned long *cpu_bitmap)
1504 {
1505 int i, err = -1;
1506 struct cpu_map *map;
1507
1508 for (i = 0; i < PERF_TYPE_MAX; ++i) {
1509 struct perf_evsel *evsel;
1510
1511 evsel = perf_session__find_first_evtype(session, i);
1512 if (!evsel)
1513 continue;
1514
1515 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1516 pr_err("File does not contain CPU events. "
1517 "Remove -c option to proceed.\n");
1518 return -1;
1519 }
1520 }
1521
1522 map = cpu_map__new(cpu_list);
1523 if (map == NULL) {
1524 pr_err("Invalid cpu_list\n");
1525 return -1;
1526 }
1527
1528 for (i = 0; i < map->nr; i++) {
1529 int cpu = map->map[i];
1530
1531 if (cpu >= MAX_NR_CPUS) {
1532 pr_err("Requested CPU %d too large. "
1533 "Consider raising MAX_NR_CPUS\n", cpu);
1534 goto out_delete_map;
1535 }
1536
1537 set_bit(cpu, cpu_bitmap);
1538 }
1539
1540 err = 0;
1541
1542 out_delete_map:
1543 cpu_map__delete(map);
1544 return err;
1545 }
1546
perf_session__fprintf_info(struct perf_session * session,FILE * fp,bool full)1547 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1548 bool full)
1549 {
1550 struct stat st;
1551 int fd, ret;
1552
1553 if (session == NULL || fp == NULL)
1554 return;
1555
1556 fd = perf_data_file__fd(session->file);
1557
1558 ret = fstat(fd, &st);
1559 if (ret == -1)
1560 return;
1561
1562 fprintf(fp, "# ========\n");
1563 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1564 perf_header__fprintf_info(session, fp, full);
1565 fprintf(fp, "# ========\n#\n");
1566 }
1567
1568
__perf_session__set_tracepoints_handlers(struct perf_session * session,const struct perf_evsel_str_handler * assocs,size_t nr_assocs)1569 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
1570 const struct perf_evsel_str_handler *assocs,
1571 size_t nr_assocs)
1572 {
1573 struct perf_evsel *evsel;
1574 size_t i;
1575 int err;
1576
1577 for (i = 0; i < nr_assocs; i++) {
1578 /*
1579 * Adding a handler for an event not in the session,
1580 * just ignore it.
1581 */
1582 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
1583 if (evsel == NULL)
1584 continue;
1585
1586 err = -EEXIST;
1587 if (evsel->handler != NULL)
1588 goto out;
1589 evsel->handler = assocs[i].handler;
1590 }
1591
1592 err = 0;
1593 out:
1594 return err;
1595 }
1596