Commit | Line | Data |
---|---|---|
b8f46c5a XG |
1 | #define _FILE_OFFSET_BITS 64 |
2 | ||
94c744b6 ACM |
3 | #include <linux/kernel.h> |
4 | ||
ba21594c | 5 | #include <byteswap.h> |
94c744b6 ACM |
6 | #include <unistd.h> |
7 | #include <sys/types.h> | |
8 | ||
9 | #include "session.h" | |
a328626b | 10 | #include "sort.h" |
94c744b6 ACM |
11 | #include "util.h" |
12 | ||
13 | static int perf_session__open(struct perf_session *self, bool force) | |
14 | { | |
15 | struct stat input_stat; | |
16 | ||
8dc58101 TZ |
17 | if (!strcmp(self->filename, "-")) { |
18 | self->fd_pipe = true; | |
19 | self->fd = STDIN_FILENO; | |
20 | ||
21 | if (perf_header__read(self, self->fd) < 0) | |
22 | pr_err("incompatible file format"); | |
23 | ||
24 | return 0; | |
25 | } | |
26 | ||
f887f301 | 27 | self->fd = open(self->filename, O_RDONLY); |
94c744b6 ACM |
28 | if (self->fd < 0) { |
29 | pr_err("failed to open file: %s", self->filename); | |
30 | if (!strcmp(self->filename, "perf.data")) | |
31 | pr_err(" (try 'perf record' first)"); | |
32 | pr_err("\n"); | |
33 | return -errno; | |
34 | } | |
35 | ||
36 | if (fstat(self->fd, &input_stat) < 0) | |
37 | goto out_close; | |
38 | ||
39 | if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) { | |
40 | pr_err("file %s not owned by current user or root\n", | |
41 | self->filename); | |
42 | goto out_close; | |
43 | } | |
44 | ||
45 | if (!input_stat.st_size) { | |
46 | pr_info("zero-sized file (%s), nothing to do!\n", | |
47 | self->filename); | |
48 | goto out_close; | |
49 | } | |
50 | ||
8dc58101 | 51 | if (perf_header__read(self, self->fd) < 0) { |
94c744b6 ACM |
52 | pr_err("incompatible file format"); |
53 | goto out_close; | |
54 | } | |
55 | ||
56 | self->size = input_stat.st_size; | |
57 | return 0; | |
58 | ||
59 | out_close: | |
60 | close(self->fd); | |
61 | self->fd = -1; | |
62 | return -1; | |
63 | } | |
64 | ||
8dc58101 TZ |
65 | void perf_session__update_sample_type(struct perf_session *self) |
66 | { | |
67 | self->sample_type = perf_header__sample_type(&self->header); | |
68 | } | |
69 | ||
a1645ce1 ZY |
70 | int perf_session__create_kernel_maps(struct perf_session *self) |
71 | { | |
d28c6223 ACM |
72 | struct rb_root *machines = &self->machines; |
73 | int ret = machines__create_kernel_maps(machines, HOST_KERNEL_ID); | |
a1645ce1 | 74 | |
a1645ce1 | 75 | if (ret >= 0) |
d28c6223 | 76 | ret = machines__create_guest_kernel_maps(machines); |
a1645ce1 ZY |
77 | return ret; |
78 | } | |
79 | ||
454c407e | 80 | struct perf_session *perf_session__new(const char *filename, int mode, bool force, bool repipe) |
94c744b6 | 81 | { |
b3165f41 | 82 | size_t len = filename ? strlen(filename) + 1 : 0; |
94c744b6 ACM |
83 | struct perf_session *self = zalloc(sizeof(*self) + len); |
84 | ||
85 | if (self == NULL) | |
86 | goto out; | |
87 | ||
88 | if (perf_header__init(&self->header) < 0) | |
4aa65636 | 89 | goto out_free; |
94c744b6 ACM |
90 | |
91 | memcpy(self->filename, filename, len); | |
b3165f41 | 92 | self->threads = RB_ROOT; |
cb8f0939 | 93 | self->stats_by_id = RB_ROOT; |
b3165f41 | 94 | self->last_match = NULL; |
ec913369 ACM |
95 | self->mmap_window = 32; |
96 | self->cwd = NULL; | |
97 | self->cwdlen = 0; | |
31d337c4 | 98 | self->unknown_events = 0; |
23346f21 | 99 | self->machines = RB_ROOT; |
454c407e | 100 | self->repipe = repipe; |
c61e52ee FW |
101 | self->ordered_samples.flush_limit = ULLONG_MAX; |
102 | INIT_LIST_HEAD(&self->ordered_samples.samples_head); | |
94c744b6 | 103 | |
64abebf7 ACM |
104 | if (mode == O_RDONLY) { |
105 | if (perf_session__open(self, force) < 0) | |
106 | goto out_delete; | |
107 | } else if (mode == O_WRONLY) { | |
108 | /* | |
109 | * In O_RDONLY mode this will be performed when reading the | |
110 | * kernel MMAP event, in event__process_mmap(). | |
111 | */ | |
112 | if (perf_session__create_kernel_maps(self) < 0) | |
113 | goto out_delete; | |
114 | } | |
d549c769 | 115 | |
8dc58101 | 116 | perf_session__update_sample_type(self); |
94c744b6 ACM |
117 | out: |
118 | return self; | |
4aa65636 | 119 | out_free: |
94c744b6 ACM |
120 | free(self); |
121 | return NULL; | |
4aa65636 ACM |
122 | out_delete: |
123 | perf_session__delete(self); | |
124 | return NULL; | |
94c744b6 ACM |
125 | } |
126 | ||
127 | void perf_session__delete(struct perf_session *self) | |
128 | { | |
129 | perf_header__exit(&self->header); | |
130 | close(self->fd); | |
ec913369 | 131 | free(self->cwd); |
94c744b6 ACM |
132 | free(self); |
133 | } | |
a328626b ACM |
134 | |
135 | static bool symbol__match_parent_regex(struct symbol *sym) | |
136 | { | |
137 | if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0)) | |
138 | return 1; | |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
b3c9ac08 ACM |
143 | struct map_symbol *perf_session__resolve_callchain(struct perf_session *self, |
144 | struct thread *thread, | |
145 | struct ip_callchain *chain, | |
146 | struct symbol **parent) | |
a328626b ACM |
147 | { |
148 | u8 cpumode = PERF_RECORD_MISC_USER; | |
a328626b | 149 | unsigned int i; |
ad5b217b | 150 | struct map_symbol *syms = calloc(chain->nr, sizeof(*syms)); |
a328626b | 151 | |
ad5b217b ACM |
152 | if (!syms) |
153 | return NULL; | |
a328626b ACM |
154 | |
155 | for (i = 0; i < chain->nr; i++) { | |
156 | u64 ip = chain->ips[i]; | |
157 | struct addr_location al; | |
158 | ||
159 | if (ip >= PERF_CONTEXT_MAX) { | |
160 | switch (ip) { | |
161 | case PERF_CONTEXT_HV: | |
162 | cpumode = PERF_RECORD_MISC_HYPERVISOR; break; | |
163 | case PERF_CONTEXT_KERNEL: | |
164 | cpumode = PERF_RECORD_MISC_KERNEL; break; | |
165 | case PERF_CONTEXT_USER: | |
166 | cpumode = PERF_RECORD_MISC_USER; break; | |
167 | default: | |
168 | break; | |
169 | } | |
170 | continue; | |
171 | } | |
172 | ||
a1645ce1 | 173 | al.filtered = false; |
a328626b | 174 | thread__find_addr_location(thread, self, cpumode, |
a1645ce1 | 175 | MAP__FUNCTION, thread->pid, ip, &al, NULL); |
a328626b ACM |
176 | if (al.sym != NULL) { |
177 | if (sort__has_parent && !*parent && | |
178 | symbol__match_parent_regex(al.sym)) | |
179 | *parent = al.sym; | |
d599db3f | 180 | if (!symbol_conf.use_callchain) |
a328626b | 181 | break; |
b3c9ac08 ACM |
182 | syms[i].map = al.map; |
183 | syms[i].sym = al.sym; | |
a328626b ACM |
184 | } |
185 | } | |
186 | ||
187 | return syms; | |
188 | } | |
06aae590 ACM |
189 | |
190 | static int process_event_stub(event_t *event __used, | |
191 | struct perf_session *session __used) | |
192 | { | |
193 | dump_printf(": unhandled!\n"); | |
194 | return 0; | |
195 | } | |
196 | ||
197 | static void perf_event_ops__fill_defaults(struct perf_event_ops *handler) | |
198 | { | |
55aa640f ACM |
199 | if (handler->sample == NULL) |
200 | handler->sample = process_event_stub; | |
201 | if (handler->mmap == NULL) | |
202 | handler->mmap = process_event_stub; | |
203 | if (handler->comm == NULL) | |
204 | handler->comm = process_event_stub; | |
205 | if (handler->fork == NULL) | |
206 | handler->fork = process_event_stub; | |
207 | if (handler->exit == NULL) | |
208 | handler->exit = process_event_stub; | |
209 | if (handler->lost == NULL) | |
210 | handler->lost = process_event_stub; | |
211 | if (handler->read == NULL) | |
212 | handler->read = process_event_stub; | |
213 | if (handler->throttle == NULL) | |
214 | handler->throttle = process_event_stub; | |
215 | if (handler->unthrottle == NULL) | |
216 | handler->unthrottle = process_event_stub; | |
2c46dbb5 TZ |
217 | if (handler->attr == NULL) |
218 | handler->attr = process_event_stub; | |
cd19a035 TZ |
219 | if (handler->event_type == NULL) |
220 | handler->event_type = process_event_stub; | |
9215545e TZ |
221 | if (handler->tracing_data == NULL) |
222 | handler->tracing_data = process_event_stub; | |
c7929e47 TZ |
223 | if (handler->build_id == NULL) |
224 | handler->build_id = process_event_stub; | |
06aae590 ACM |
225 | } |
226 | ||
227 | static const char *event__name[] = { | |
228 | [0] = "TOTAL", | |
229 | [PERF_RECORD_MMAP] = "MMAP", | |
230 | [PERF_RECORD_LOST] = "LOST", | |
231 | [PERF_RECORD_COMM] = "COMM", | |
232 | [PERF_RECORD_EXIT] = "EXIT", | |
233 | [PERF_RECORD_THROTTLE] = "THROTTLE", | |
234 | [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE", | |
235 | [PERF_RECORD_FORK] = "FORK", | |
236 | [PERF_RECORD_READ] = "READ", | |
237 | [PERF_RECORD_SAMPLE] = "SAMPLE", | |
2c46dbb5 | 238 | [PERF_RECORD_HEADER_ATTR] = "ATTR", |
cd19a035 | 239 | [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE", |
9215545e | 240 | [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA", |
c7929e47 | 241 | [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID", |
06aae590 ACM |
242 | }; |
243 | ||
8dc58101 | 244 | unsigned long event__total[PERF_RECORD_HEADER_MAX]; |
06aae590 ACM |
245 | |
246 | void event__print_totals(void) | |
247 | { | |
248 | int i; | |
8dc58101 TZ |
249 | for (i = 0; i < PERF_RECORD_HEADER_MAX; ++i) { |
250 | if (!event__name[i]) | |
251 | continue; | |
06aae590 ACM |
252 | pr_info("%10s events: %10ld\n", |
253 | event__name[i], event__total[i]); | |
8dc58101 | 254 | } |
06aae590 ACM |
255 | } |
256 | ||
ba21594c ACM |
257 | void mem_bswap_64(void *src, int byte_size) |
258 | { | |
259 | u64 *m = src; | |
260 | ||
261 | while (byte_size > 0) { | |
262 | *m = bswap_64(*m); | |
263 | byte_size -= sizeof(u64); | |
264 | ++m; | |
265 | } | |
266 | } | |
267 | ||
268 | static void event__all64_swap(event_t *self) | |
269 | { | |
270 | struct perf_event_header *hdr = &self->header; | |
271 | mem_bswap_64(hdr + 1, self->header.size - sizeof(*hdr)); | |
272 | } | |
273 | ||
274 | static void event__comm_swap(event_t *self) | |
275 | { | |
276 | self->comm.pid = bswap_32(self->comm.pid); | |
277 | self->comm.tid = bswap_32(self->comm.tid); | |
278 | } | |
279 | ||
280 | static void event__mmap_swap(event_t *self) | |
281 | { | |
282 | self->mmap.pid = bswap_32(self->mmap.pid); | |
283 | self->mmap.tid = bswap_32(self->mmap.tid); | |
284 | self->mmap.start = bswap_64(self->mmap.start); | |
285 | self->mmap.len = bswap_64(self->mmap.len); | |
286 | self->mmap.pgoff = bswap_64(self->mmap.pgoff); | |
287 | } | |
288 | ||
289 | static void event__task_swap(event_t *self) | |
290 | { | |
291 | self->fork.pid = bswap_32(self->fork.pid); | |
292 | self->fork.tid = bswap_32(self->fork.tid); | |
293 | self->fork.ppid = bswap_32(self->fork.ppid); | |
294 | self->fork.ptid = bswap_32(self->fork.ptid); | |
295 | self->fork.time = bswap_64(self->fork.time); | |
296 | } | |
297 | ||
298 | static void event__read_swap(event_t *self) | |
299 | { | |
300 | self->read.pid = bswap_32(self->read.pid); | |
301 | self->read.tid = bswap_32(self->read.tid); | |
302 | self->read.value = bswap_64(self->read.value); | |
303 | self->read.time_enabled = bswap_64(self->read.time_enabled); | |
304 | self->read.time_running = bswap_64(self->read.time_running); | |
305 | self->read.id = bswap_64(self->read.id); | |
306 | } | |
307 | ||
2c46dbb5 TZ |
308 | static void event__attr_swap(event_t *self) |
309 | { | |
310 | size_t size; | |
311 | ||
312 | self->attr.attr.type = bswap_32(self->attr.attr.type); | |
313 | self->attr.attr.size = bswap_32(self->attr.attr.size); | |
314 | self->attr.attr.config = bswap_64(self->attr.attr.config); | |
315 | self->attr.attr.sample_period = bswap_64(self->attr.attr.sample_period); | |
316 | self->attr.attr.sample_type = bswap_64(self->attr.attr.sample_type); | |
317 | self->attr.attr.read_format = bswap_64(self->attr.attr.read_format); | |
318 | self->attr.attr.wakeup_events = bswap_32(self->attr.attr.wakeup_events); | |
319 | self->attr.attr.bp_type = bswap_32(self->attr.attr.bp_type); | |
320 | self->attr.attr.bp_addr = bswap_64(self->attr.attr.bp_addr); | |
321 | self->attr.attr.bp_len = bswap_64(self->attr.attr.bp_len); | |
322 | ||
323 | size = self->header.size; | |
324 | size -= (void *)&self->attr.id - (void *)self; | |
325 | mem_bswap_64(self->attr.id, size); | |
326 | } | |
327 | ||
cd19a035 TZ |
328 | static void event__event_type_swap(event_t *self) |
329 | { | |
330 | self->event_type.event_type.event_id = | |
331 | bswap_64(self->event_type.event_type.event_id); | |
332 | } | |
333 | ||
9215545e TZ |
334 | static void event__tracing_data_swap(event_t *self) |
335 | { | |
336 | self->tracing_data.size = bswap_32(self->tracing_data.size); | |
337 | } | |
338 | ||
ba21594c ACM |
339 | typedef void (*event__swap_op)(event_t *self); |
340 | ||
341 | static event__swap_op event__swap_ops[] = { | |
342 | [PERF_RECORD_MMAP] = event__mmap_swap, | |
343 | [PERF_RECORD_COMM] = event__comm_swap, | |
344 | [PERF_RECORD_FORK] = event__task_swap, | |
345 | [PERF_RECORD_EXIT] = event__task_swap, | |
346 | [PERF_RECORD_LOST] = event__all64_swap, | |
347 | [PERF_RECORD_READ] = event__read_swap, | |
348 | [PERF_RECORD_SAMPLE] = event__all64_swap, | |
2c46dbb5 | 349 | [PERF_RECORD_HEADER_ATTR] = event__attr_swap, |
cd19a035 | 350 | [PERF_RECORD_HEADER_EVENT_TYPE] = event__event_type_swap, |
9215545e | 351 | [PERF_RECORD_HEADER_TRACING_DATA] = event__tracing_data_swap, |
c7929e47 | 352 | [PERF_RECORD_HEADER_BUILD_ID] = NULL, |
8dc58101 | 353 | [PERF_RECORD_HEADER_MAX] = NULL, |
ba21594c ACM |
354 | }; |
355 | ||
c61e52ee FW |
356 | struct sample_queue { |
357 | u64 timestamp; | |
358 | struct sample_event *event; | |
359 | struct list_head list; | |
360 | }; | |
361 | ||
362 | #define FLUSH_PERIOD (2 * NSEC_PER_SEC) | |
363 | ||
364 | static void flush_sample_queue(struct perf_session *s, | |
365 | struct perf_event_ops *ops) | |
366 | { | |
367 | struct list_head *head = &s->ordered_samples.samples_head; | |
368 | u64 limit = s->ordered_samples.flush_limit; | |
369 | struct sample_queue *tmp, *iter; | |
370 | ||
371 | if (!ops->ordered_samples) | |
372 | return; | |
373 | ||
374 | list_for_each_entry_safe(iter, tmp, head, list) { | |
375 | if (iter->timestamp > limit) | |
376 | return; | |
377 | ||
378 | if (iter == s->ordered_samples.last_inserted) | |
379 | s->ordered_samples.last_inserted = NULL; | |
380 | ||
381 | ops->sample((event_t *)iter->event, s); | |
382 | ||
383 | s->ordered_samples.last_flush = iter->timestamp; | |
384 | list_del(&iter->list); | |
385 | free(iter->event); | |
386 | free(iter); | |
387 | } | |
388 | } | |
389 | ||
390 | static void __queue_sample_end(struct sample_queue *new, struct list_head *head) | |
391 | { | |
392 | struct sample_queue *iter; | |
393 | ||
394 | list_for_each_entry_reverse(iter, head, list) { | |
395 | if (iter->timestamp < new->timestamp) { | |
396 | list_add(&new->list, &iter->list); | |
397 | return; | |
398 | } | |
399 | } | |
400 | ||
401 | list_add(&new->list, head); | |
402 | } | |
403 | ||
404 | static void __queue_sample_before(struct sample_queue *new, | |
405 | struct sample_queue *iter, | |
406 | struct list_head *head) | |
407 | { | |
408 | list_for_each_entry_continue_reverse(iter, head, list) { | |
409 | if (iter->timestamp < new->timestamp) { | |
410 | list_add(&new->list, &iter->list); | |
411 | return; | |
412 | } | |
413 | } | |
414 | ||
415 | list_add(&new->list, head); | |
416 | } | |
417 | ||
418 | static void __queue_sample_after(struct sample_queue *new, | |
419 | struct sample_queue *iter, | |
420 | struct list_head *head) | |
421 | { | |
422 | list_for_each_entry_continue(iter, head, list) { | |
423 | if (iter->timestamp > new->timestamp) { | |
424 | list_add_tail(&new->list, &iter->list); | |
425 | return; | |
426 | } | |
427 | } | |
428 | list_add_tail(&new->list, head); | |
429 | } | |
430 | ||
431 | /* The queue is ordered by time */ | |
432 | static void __queue_sample_event(struct sample_queue *new, | |
433 | struct perf_session *s) | |
434 | { | |
435 | struct sample_queue *last_inserted = s->ordered_samples.last_inserted; | |
436 | struct list_head *head = &s->ordered_samples.samples_head; | |
437 | ||
438 | ||
439 | if (!last_inserted) { | |
440 | __queue_sample_end(new, head); | |
441 | return; | |
442 | } | |
443 | ||
444 | /* | |
445 | * Most of the time the current event has a timestamp | |
446 | * very close to the last event inserted, unless we just switched | |
447 | * to another event buffer. Having a sorting based on a list and | |
448 | * on the last inserted event that is close to the current one is | |
449 | * probably more efficient than an rbtree based sorting. | |
450 | */ | |
451 | if (last_inserted->timestamp >= new->timestamp) | |
452 | __queue_sample_before(new, last_inserted, head); | |
453 | else | |
454 | __queue_sample_after(new, last_inserted, head); | |
455 | } | |
456 | ||
457 | static int queue_sample_event(event_t *event, struct sample_data *data, | |
458 | struct perf_session *s, | |
459 | struct perf_event_ops *ops) | |
460 | { | |
461 | u64 timestamp = data->time; | |
462 | struct sample_queue *new; | |
463 | u64 flush_limit; | |
464 | ||
465 | ||
466 | if (s->ordered_samples.flush_limit == ULLONG_MAX) | |
467 | s->ordered_samples.flush_limit = timestamp + FLUSH_PERIOD; | |
468 | ||
469 | if (timestamp < s->ordered_samples.last_flush) { | |
470 | printf("Warning: Timestamp below last timeslice flush\n"); | |
471 | return -EINVAL; | |
472 | } | |
473 | ||
474 | new = malloc(sizeof(*new)); | |
475 | if (!new) | |
476 | return -ENOMEM; | |
477 | ||
478 | new->timestamp = timestamp; | |
479 | ||
480 | new->event = malloc(event->header.size); | |
481 | if (!new->event) { | |
482 | free(new); | |
483 | return -ENOMEM; | |
484 | } | |
485 | ||
486 | memcpy(new->event, event, event->header.size); | |
487 | ||
488 | __queue_sample_event(new, s); | |
489 | s->ordered_samples.last_inserted = new; | |
490 | ||
491 | /* | |
492 | * We want to have a slice of events covering 2 * FLUSH_PERIOD | |
493 | * If FLUSH_PERIOD is big enough, it ensures every events that occured | |
494 | * in the first half of the timeslice have all been buffered and there | |
495 | * are none remaining (we need that because of the weakly ordered | |
496 | * event recording we have). Then once we reach the 2 * FLUSH_PERIOD | |
497 | * timeslice, we flush the first half to be gentle with the memory | |
498 | * (the second half can still get new events in the middle, so wait | |
499 | * another period to flush it) | |
500 | */ | |
501 | flush_limit = s->ordered_samples.flush_limit; | |
502 | ||
503 | if (new->timestamp > flush_limit && | |
504 | new->timestamp - flush_limit > FLUSH_PERIOD) { | |
505 | s->ordered_samples.flush_limit += FLUSH_PERIOD; | |
506 | flush_sample_queue(s, ops); | |
507 | } | |
508 | ||
509 | return 0; | |
510 | } | |
511 | ||
512 | static int perf_session__process_sample(event_t *event, struct perf_session *s, | |
513 | struct perf_event_ops *ops) | |
514 | { | |
515 | struct sample_data data; | |
516 | ||
517 | if (!ops->ordered_samples) | |
518 | return ops->sample(event, s); | |
519 | ||
520 | bzero(&data, sizeof(struct sample_data)); | |
521 | event__parse_sample(event, s->sample_type, &data); | |
522 | ||
523 | queue_sample_event(event, &data, s, ops); | |
524 | ||
525 | return 0; | |
526 | } | |
527 | ||
06aae590 ACM |
528 | static int perf_session__process_event(struct perf_session *self, |
529 | event_t *event, | |
530 | struct perf_event_ops *ops, | |
ba21594c | 531 | u64 offset, u64 head) |
06aae590 ACM |
532 | { |
533 | trace_event(event); | |
534 | ||
8dc58101 | 535 | if (event->header.type < PERF_RECORD_HEADER_MAX) { |
ba21594c | 536 | dump_printf("%#Lx [%#x]: PERF_RECORD_%s", |
0d755034 | 537 | offset + head, event->header.size, |
06aae590 ACM |
538 | event__name[event->header.type]); |
539 | ++event__total[0]; | |
540 | ++event__total[event->header.type]; | |
541 | } | |
542 | ||
ba21594c ACM |
543 | if (self->header.needs_swap && event__swap_ops[event->header.type]) |
544 | event__swap_ops[event->header.type](event); | |
545 | ||
06aae590 ACM |
546 | switch (event->header.type) { |
547 | case PERF_RECORD_SAMPLE: | |
c61e52ee | 548 | return perf_session__process_sample(event, self, ops); |
06aae590 | 549 | case PERF_RECORD_MMAP: |
55aa640f | 550 | return ops->mmap(event, self); |
06aae590 | 551 | case PERF_RECORD_COMM: |
55aa640f | 552 | return ops->comm(event, self); |
06aae590 | 553 | case PERF_RECORD_FORK: |
55aa640f | 554 | return ops->fork(event, self); |
06aae590 | 555 | case PERF_RECORD_EXIT: |
55aa640f | 556 | return ops->exit(event, self); |
06aae590 | 557 | case PERF_RECORD_LOST: |
55aa640f | 558 | return ops->lost(event, self); |
06aae590 | 559 | case PERF_RECORD_READ: |
55aa640f | 560 | return ops->read(event, self); |
06aae590 | 561 | case PERF_RECORD_THROTTLE: |
55aa640f | 562 | return ops->throttle(event, self); |
06aae590 | 563 | case PERF_RECORD_UNTHROTTLE: |
55aa640f | 564 | return ops->unthrottle(event, self); |
2c46dbb5 TZ |
565 | case PERF_RECORD_HEADER_ATTR: |
566 | return ops->attr(event, self); | |
cd19a035 TZ |
567 | case PERF_RECORD_HEADER_EVENT_TYPE: |
568 | return ops->event_type(event, self); | |
9215545e TZ |
569 | case PERF_RECORD_HEADER_TRACING_DATA: |
570 | /* setup for reading amidst mmap */ | |
571 | lseek(self->fd, offset + head, SEEK_SET); | |
572 | return ops->tracing_data(event, self); | |
c7929e47 TZ |
573 | case PERF_RECORD_HEADER_BUILD_ID: |
574 | return ops->build_id(event, self); | |
06aae590 | 575 | default: |
31d337c4 | 576 | self->unknown_events++; |
06aae590 ACM |
577 | return -1; |
578 | } | |
579 | } | |
580 | ||
ba21594c ACM |
581 | void perf_event_header__bswap(struct perf_event_header *self) |
582 | { | |
583 | self->type = bswap_32(self->type); | |
584 | self->misc = bswap_16(self->misc); | |
585 | self->size = bswap_16(self->size); | |
586 | } | |
587 | ||
06aae590 ACM |
588 | static struct thread *perf_session__register_idle_thread(struct perf_session *self) |
589 | { | |
590 | struct thread *thread = perf_session__findnew(self, 0); | |
591 | ||
592 | if (thread == NULL || thread__set_comm(thread, "swapper")) { | |
593 | pr_err("problem inserting idle task.\n"); | |
594 | thread = NULL; | |
595 | } | |
596 | ||
597 | return thread; | |
598 | } | |
599 | ||
8dc58101 TZ |
600 | int do_read(int fd, void *buf, size_t size) |
601 | { | |
602 | void *buf_start = buf; | |
603 | ||
604 | while (size) { | |
605 | int ret = read(fd, buf, size); | |
606 | ||
607 | if (ret <= 0) | |
608 | return ret; | |
609 | ||
610 | size -= ret; | |
611 | buf += ret; | |
612 | } | |
613 | ||
614 | return buf - buf_start; | |
615 | } | |
616 | ||
617 | #define session_done() (*(volatile int *)(&session_done)) | |
618 | volatile int session_done; | |
619 | ||
620 | static int __perf_session__process_pipe_events(struct perf_session *self, | |
621 | struct perf_event_ops *ops) | |
622 | { | |
623 | event_t event; | |
624 | uint32_t size; | |
625 | int skip = 0; | |
626 | u64 head; | |
627 | int err; | |
628 | void *p; | |
629 | ||
630 | perf_event_ops__fill_defaults(ops); | |
631 | ||
632 | head = 0; | |
633 | more: | |
634 | err = do_read(self->fd, &event, sizeof(struct perf_event_header)); | |
635 | if (err <= 0) { | |
636 | if (err == 0) | |
637 | goto done; | |
638 | ||
639 | pr_err("failed to read event header\n"); | |
640 | goto out_err; | |
641 | } | |
642 | ||
643 | if (self->header.needs_swap) | |
644 | perf_event_header__bswap(&event.header); | |
645 | ||
646 | size = event.header.size; | |
647 | if (size == 0) | |
648 | size = 8; | |
649 | ||
650 | p = &event; | |
651 | p += sizeof(struct perf_event_header); | |
652 | ||
653 | err = do_read(self->fd, p, size - sizeof(struct perf_event_header)); | |
654 | if (err <= 0) { | |
655 | if (err == 0) { | |
656 | pr_err("unexpected end of event stream\n"); | |
657 | goto done; | |
658 | } | |
659 | ||
660 | pr_err("failed to read event data\n"); | |
661 | goto out_err; | |
662 | } | |
663 | ||
664 | if (size == 0 || | |
665 | (skip = perf_session__process_event(self, &event, ops, | |
666 | 0, head)) < 0) { | |
667 | dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n", | |
668 | head, event.header.size, event.header.type); | |
669 | /* | |
670 | * assume we lost track of the stream, check alignment, and | |
671 | * increment a single u64 in the hope to catch on again 'soon'. | |
672 | */ | |
673 | if (unlikely(head & 7)) | |
674 | head &= ~7ULL; | |
675 | ||
676 | size = 8; | |
677 | } | |
678 | ||
679 | head += size; | |
680 | ||
681 | dump_printf("\n%#Lx [%#x]: event: %d\n", | |
682 | head, event.header.size, event.header.type); | |
683 | ||
684 | if (skip > 0) | |
685 | head += skip; | |
686 | ||
687 | if (!session_done()) | |
688 | goto more; | |
689 | done: | |
690 | err = 0; | |
691 | out_err: | |
692 | return err; | |
693 | } | |
694 | ||
6122e4e4 ACM |
695 | int __perf_session__process_events(struct perf_session *self, |
696 | u64 data_offset, u64 data_size, | |
697 | u64 file_size, struct perf_event_ops *ops) | |
06aae590 | 698 | { |
ba21594c ACM |
699 | int err, mmap_prot, mmap_flags; |
700 | u64 head, shift; | |
701 | u64 offset = 0; | |
06aae590 ACM |
702 | size_t page_size; |
703 | event_t *event; | |
704 | uint32_t size; | |
705 | char *buf; | |
5f4d3f88 ACM |
706 | struct ui_progress *progress = ui_progress__new("Processing events...", |
707 | self->size); | |
708 | if (progress == NULL) | |
709 | return -1; | |
06aae590 | 710 | |
06aae590 ACM |
711 | perf_event_ops__fill_defaults(ops); |
712 | ||
1b75962e | 713 | page_size = sysconf(_SC_PAGESIZE); |
06aae590 | 714 | |
6122e4e4 | 715 | head = data_offset; |
06aae590 ACM |
716 | shift = page_size * (head / page_size); |
717 | offset += shift; | |
718 | head -= shift; | |
719 | ||
ba21594c ACM |
720 | mmap_prot = PROT_READ; |
721 | mmap_flags = MAP_SHARED; | |
722 | ||
723 | if (self->header.needs_swap) { | |
724 | mmap_prot |= PROT_WRITE; | |
725 | mmap_flags = MAP_PRIVATE; | |
726 | } | |
06aae590 | 727 | remap: |
ba21594c ACM |
728 | buf = mmap(NULL, page_size * self->mmap_window, mmap_prot, |
729 | mmap_flags, self->fd, offset); | |
06aae590 ACM |
730 | if (buf == MAP_FAILED) { |
731 | pr_err("failed to mmap file\n"); | |
732 | err = -errno; | |
733 | goto out_err; | |
734 | } | |
735 | ||
736 | more: | |
737 | event = (event_t *)(buf + head); | |
5f4d3f88 | 738 | ui_progress__update(progress, offset); |
06aae590 | 739 | |
ba21594c ACM |
740 | if (self->header.needs_swap) |
741 | perf_event_header__bswap(&event->header); | |
06aae590 ACM |
742 | size = event->header.size; |
743 | if (size == 0) | |
744 | size = 8; | |
745 | ||
746 | if (head + event->header.size >= page_size * self->mmap_window) { | |
747 | int munmap_ret; | |
748 | ||
749 | shift = page_size * (head / page_size); | |
750 | ||
751 | munmap_ret = munmap(buf, page_size * self->mmap_window); | |
752 | assert(munmap_ret == 0); | |
753 | ||
754 | offset += shift; | |
755 | head -= shift; | |
756 | goto remap; | |
757 | } | |
758 | ||
759 | size = event->header.size; | |
760 | ||
ba21594c | 761 | dump_printf("\n%#Lx [%#x]: event: %d\n", |
0d755034 | 762 | offset + head, event->header.size, event->header.type); |
06aae590 ACM |
763 | |
764 | if (size == 0 || | |
765 | perf_session__process_event(self, event, ops, offset, head) < 0) { | |
ba21594c | 766 | dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n", |
0d755034 | 767 | offset + head, event->header.size, |
06aae590 ACM |
768 | event->header.type); |
769 | /* | |
770 | * assume we lost track of the stream, check alignment, and | |
771 | * increment a single u64 in the hope to catch on again 'soon'. | |
772 | */ | |
773 | if (unlikely(head & 7)) | |
774 | head &= ~7ULL; | |
775 | ||
776 | size = 8; | |
777 | } | |
778 | ||
779 | head += size; | |
780 | ||
6122e4e4 | 781 | if (offset + head >= data_offset + data_size) |
06aae590 ACM |
782 | goto done; |
783 | ||
6122e4e4 | 784 | if (offset + head < file_size) |
06aae590 ACM |
785 | goto more; |
786 | done: | |
787 | err = 0; | |
c61e52ee FW |
788 | /* do the final flush for ordered samples */ |
789 | self->ordered_samples.flush_limit = ULLONG_MAX; | |
790 | flush_sample_queue(self, ops); | |
06aae590 | 791 | out_err: |
5f4d3f88 | 792 | ui_progress__delete(progress); |
06aae590 ACM |
793 | return err; |
794 | } | |
27295592 | 795 | |
6122e4e4 ACM |
796 | int perf_session__process_events(struct perf_session *self, |
797 | struct perf_event_ops *ops) | |
798 | { | |
799 | int err; | |
800 | ||
801 | if (perf_session__register_idle_thread(self) == NULL) | |
802 | return -ENOMEM; | |
803 | ||
804 | if (!symbol_conf.full_paths) { | |
805 | char bf[PATH_MAX]; | |
806 | ||
807 | if (getcwd(bf, sizeof(bf)) == NULL) { | |
808 | err = -errno; | |
809 | out_getcwd_err: | |
810 | pr_err("failed to get the current directory\n"); | |
811 | goto out_err; | |
812 | } | |
813 | self->cwd = strdup(bf); | |
814 | if (self->cwd == NULL) { | |
815 | err = -ENOMEM; | |
816 | goto out_getcwd_err; | |
817 | } | |
818 | self->cwdlen = strlen(self->cwd); | |
819 | } | |
820 | ||
8dc58101 TZ |
821 | if (!self->fd_pipe) |
822 | err = __perf_session__process_events(self, | |
823 | self->header.data_offset, | |
824 | self->header.data_size, | |
825 | self->size, ops); | |
826 | else | |
827 | err = __perf_session__process_pipe_events(self, ops); | |
6122e4e4 ACM |
828 | out_err: |
829 | return err; | |
830 | } | |
831 | ||
d549c769 | 832 | bool perf_session__has_traces(struct perf_session *self, const char *msg) |
27295592 ACM |
833 | { |
834 | if (!(self->sample_type & PERF_SAMPLE_RAW)) { | |
d549c769 ACM |
835 | pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); |
836 | return false; | |
27295592 ACM |
837 | } |
838 | ||
d549c769 | 839 | return true; |
27295592 | 840 | } |
56b03f3c | 841 | |
a1645ce1 | 842 | int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps, |
56b03f3c ACM |
843 | const char *symbol_name, |
844 | u64 addr) | |
845 | { | |
846 | char *bracket; | |
9de89fe7 | 847 | enum map_type i; |
a1645ce1 ZY |
848 | struct ref_reloc_sym *ref; |
849 | ||
850 | ref = zalloc(sizeof(struct ref_reloc_sym)); | |
851 | if (ref == NULL) | |
852 | return -ENOMEM; | |
56b03f3c | 853 | |
a1645ce1 ZY |
854 | ref->name = strdup(symbol_name); |
855 | if (ref->name == NULL) { | |
856 | free(ref); | |
56b03f3c | 857 | return -ENOMEM; |
a1645ce1 | 858 | } |
56b03f3c | 859 | |
a1645ce1 | 860 | bracket = strchr(ref->name, ']'); |
56b03f3c ACM |
861 | if (bracket) |
862 | *bracket = '\0'; | |
863 | ||
a1645ce1 | 864 | ref->addr = addr; |
9de89fe7 ACM |
865 | |
866 | for (i = 0; i < MAP__NR_TYPES; ++i) { | |
a1645ce1 ZY |
867 | struct kmap *kmap = map__kmap(maps[i]); |
868 | kmap->ref_reloc_sym = ref; | |
9de89fe7 ACM |
869 | } |
870 | ||
56b03f3c ACM |
871 | return 0; |
872 | } |