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Commit | Line | Data |
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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> | |
a41794cd | 8 | #include <sys/mman.h> |
94c744b6 ACM |
9 | |
10 | #include "session.h" | |
a328626b | 11 | #include "sort.h" |
94c744b6 ACM |
12 | #include "util.h" |
13 | ||
14 | static int perf_session__open(struct perf_session *self, bool force) | |
15 | { | |
16 | struct stat input_stat; | |
17 | ||
8dc58101 TZ |
18 | if (!strcmp(self->filename, "-")) { |
19 | self->fd_pipe = true; | |
20 | self->fd = STDIN_FILENO; | |
21 | ||
22 | if (perf_header__read(self, self->fd) < 0) | |
23 | pr_err("incompatible file format"); | |
24 | ||
25 | return 0; | |
26 | } | |
27 | ||
f887f301 | 28 | self->fd = open(self->filename, O_RDONLY); |
94c744b6 ACM |
29 | if (self->fd < 0) { |
30 | pr_err("failed to open file: %s", self->filename); | |
31 | if (!strcmp(self->filename, "perf.data")) | |
32 | pr_err(" (try 'perf record' first)"); | |
33 | pr_err("\n"); | |
34 | return -errno; | |
35 | } | |
36 | ||
37 | if (fstat(self->fd, &input_stat) < 0) | |
38 | goto out_close; | |
39 | ||
40 | if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) { | |
41 | pr_err("file %s not owned by current user or root\n", | |
42 | self->filename); | |
43 | goto out_close; | |
44 | } | |
45 | ||
46 | if (!input_stat.st_size) { | |
47 | pr_info("zero-sized file (%s), nothing to do!\n", | |
48 | self->filename); | |
49 | goto out_close; | |
50 | } | |
51 | ||
8dc58101 | 52 | if (perf_header__read(self, self->fd) < 0) { |
94c744b6 ACM |
53 | pr_err("incompatible file format"); |
54 | goto out_close; | |
55 | } | |
56 | ||
57 | self->size = input_stat.st_size; | |
58 | return 0; | |
59 | ||
60 | out_close: | |
61 | close(self->fd); | |
62 | self->fd = -1; | |
63 | return -1; | |
64 | } | |
65 | ||
8dc58101 TZ |
66 | void perf_session__update_sample_type(struct perf_session *self) |
67 | { | |
68 | self->sample_type = perf_header__sample_type(&self->header); | |
69 | } | |
70 | ||
a1645ce1 ZY |
71 | int perf_session__create_kernel_maps(struct perf_session *self) |
72 | { | |
d118f8ba | 73 | int ret = machine__create_kernel_maps(&self->host_machine); |
a1645ce1 | 74 | |
a1645ce1 | 75 | if (ret >= 0) |
d118f8ba | 76 | ret = machines__create_guest_kernel_maps(&self->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; |
720a3aeb | 93 | INIT_LIST_HEAD(&self->dead_threads); |
1c02c4d2 | 94 | self->hists_tree = RB_ROOT; |
b3165f41 | 95 | self->last_match = NULL; |
ec913369 ACM |
96 | self->mmap_window = 32; |
97 | self->cwd = NULL; | |
98 | self->cwdlen = 0; | |
23346f21 | 99 | self->machines = RB_ROOT; |
454c407e | 100 | self->repipe = repipe; |
c61e52ee | 101 | INIT_LIST_HEAD(&self->ordered_samples.samples_head); |
1f626bc3 | 102 | machine__init(&self->host_machine, "", HOST_KERNEL_ID); |
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 | 134 | |
720a3aeb ACM |
135 | void perf_session__remove_thread(struct perf_session *self, struct thread *th) |
136 | { | |
137 | rb_erase(&th->rb_node, &self->threads); | |
138 | /* | |
139 | * We may have references to this thread, for instance in some hist_entry | |
140 | * instances, so just move them to a separate list. | |
141 | */ | |
142 | list_add_tail(&th->node, &self->dead_threads); | |
143 | } | |
144 | ||
a328626b ACM |
145 | static bool symbol__match_parent_regex(struct symbol *sym) |
146 | { | |
147 | if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0)) | |
148 | return 1; | |
149 | ||
150 | return 0; | |
151 | } | |
152 | ||
b3c9ac08 ACM |
153 | struct map_symbol *perf_session__resolve_callchain(struct perf_session *self, |
154 | struct thread *thread, | |
155 | struct ip_callchain *chain, | |
156 | struct symbol **parent) | |
a328626b ACM |
157 | { |
158 | u8 cpumode = PERF_RECORD_MISC_USER; | |
a328626b | 159 | unsigned int i; |
ad5b217b | 160 | struct map_symbol *syms = calloc(chain->nr, sizeof(*syms)); |
a328626b | 161 | |
ad5b217b ACM |
162 | if (!syms) |
163 | return NULL; | |
a328626b ACM |
164 | |
165 | for (i = 0; i < chain->nr; i++) { | |
166 | u64 ip = chain->ips[i]; | |
167 | struct addr_location al; | |
168 | ||
169 | if (ip >= PERF_CONTEXT_MAX) { | |
170 | switch (ip) { | |
171 | case PERF_CONTEXT_HV: | |
172 | cpumode = PERF_RECORD_MISC_HYPERVISOR; break; | |
173 | case PERF_CONTEXT_KERNEL: | |
174 | cpumode = PERF_RECORD_MISC_KERNEL; break; | |
175 | case PERF_CONTEXT_USER: | |
176 | cpumode = PERF_RECORD_MISC_USER; break; | |
177 | default: | |
178 | break; | |
179 | } | |
180 | continue; | |
181 | } | |
182 | ||
a1645ce1 | 183 | al.filtered = false; |
a328626b | 184 | thread__find_addr_location(thread, self, cpumode, |
a1645ce1 | 185 | MAP__FUNCTION, thread->pid, ip, &al, NULL); |
a328626b ACM |
186 | if (al.sym != NULL) { |
187 | if (sort__has_parent && !*parent && | |
188 | symbol__match_parent_regex(al.sym)) | |
189 | *parent = al.sym; | |
d599db3f | 190 | if (!symbol_conf.use_callchain) |
a328626b | 191 | break; |
b3c9ac08 ACM |
192 | syms[i].map = al.map; |
193 | syms[i].sym = al.sym; | |
a328626b ACM |
194 | } |
195 | } | |
196 | ||
197 | return syms; | |
198 | } | |
06aae590 ACM |
199 | |
200 | static int process_event_stub(event_t *event __used, | |
201 | struct perf_session *session __used) | |
202 | { | |
203 | dump_printf(": unhandled!\n"); | |
204 | return 0; | |
205 | } | |
206 | ||
d6b17beb FW |
207 | static int process_finished_round_stub(event_t *event __used, |
208 | struct perf_session *session __used, | |
209 | struct perf_event_ops *ops __used) | |
210 | { | |
211 | dump_printf(": unhandled!\n"); | |
212 | return 0; | |
213 | } | |
214 | ||
215 | static int process_finished_round(event_t *event, | |
216 | struct perf_session *session, | |
217 | struct perf_event_ops *ops); | |
218 | ||
06aae590 ACM |
219 | static void perf_event_ops__fill_defaults(struct perf_event_ops *handler) |
220 | { | |
55aa640f ACM |
221 | if (handler->sample == NULL) |
222 | handler->sample = process_event_stub; | |
223 | if (handler->mmap == NULL) | |
224 | handler->mmap = process_event_stub; | |
225 | if (handler->comm == NULL) | |
226 | handler->comm = process_event_stub; | |
227 | if (handler->fork == NULL) | |
228 | handler->fork = process_event_stub; | |
229 | if (handler->exit == NULL) | |
230 | handler->exit = process_event_stub; | |
231 | if (handler->lost == NULL) | |
232 | handler->lost = process_event_stub; | |
233 | if (handler->read == NULL) | |
234 | handler->read = process_event_stub; | |
235 | if (handler->throttle == NULL) | |
236 | handler->throttle = process_event_stub; | |
237 | if (handler->unthrottle == NULL) | |
238 | handler->unthrottle = process_event_stub; | |
2c46dbb5 TZ |
239 | if (handler->attr == NULL) |
240 | handler->attr = process_event_stub; | |
cd19a035 TZ |
241 | if (handler->event_type == NULL) |
242 | handler->event_type = process_event_stub; | |
9215545e TZ |
243 | if (handler->tracing_data == NULL) |
244 | handler->tracing_data = process_event_stub; | |
c7929e47 TZ |
245 | if (handler->build_id == NULL) |
246 | handler->build_id = process_event_stub; | |
d6b17beb FW |
247 | if (handler->finished_round == NULL) { |
248 | if (handler->ordered_samples) | |
249 | handler->finished_round = process_finished_round; | |
250 | else | |
251 | handler->finished_round = process_finished_round_stub; | |
252 | } | |
06aae590 ACM |
253 | } |
254 | ||
ba21594c ACM |
255 | void mem_bswap_64(void *src, int byte_size) |
256 | { | |
257 | u64 *m = src; | |
258 | ||
259 | while (byte_size > 0) { | |
260 | *m = bswap_64(*m); | |
261 | byte_size -= sizeof(u64); | |
262 | ++m; | |
263 | } | |
264 | } | |
265 | ||
266 | static void event__all64_swap(event_t *self) | |
267 | { | |
268 | struct perf_event_header *hdr = &self->header; | |
269 | mem_bswap_64(hdr + 1, self->header.size - sizeof(*hdr)); | |
270 | } | |
271 | ||
272 | static void event__comm_swap(event_t *self) | |
273 | { | |
274 | self->comm.pid = bswap_32(self->comm.pid); | |
275 | self->comm.tid = bswap_32(self->comm.tid); | |
276 | } | |
277 | ||
278 | static void event__mmap_swap(event_t *self) | |
279 | { | |
280 | self->mmap.pid = bswap_32(self->mmap.pid); | |
281 | self->mmap.tid = bswap_32(self->mmap.tid); | |
282 | self->mmap.start = bswap_64(self->mmap.start); | |
283 | self->mmap.len = bswap_64(self->mmap.len); | |
284 | self->mmap.pgoff = bswap_64(self->mmap.pgoff); | |
285 | } | |
286 | ||
287 | static void event__task_swap(event_t *self) | |
288 | { | |
289 | self->fork.pid = bswap_32(self->fork.pid); | |
290 | self->fork.tid = bswap_32(self->fork.tid); | |
291 | self->fork.ppid = bswap_32(self->fork.ppid); | |
292 | self->fork.ptid = bswap_32(self->fork.ptid); | |
293 | self->fork.time = bswap_64(self->fork.time); | |
294 | } | |
295 | ||
296 | static void event__read_swap(event_t *self) | |
297 | { | |
298 | self->read.pid = bswap_32(self->read.pid); | |
299 | self->read.tid = bswap_32(self->read.tid); | |
300 | self->read.value = bswap_64(self->read.value); | |
301 | self->read.time_enabled = bswap_64(self->read.time_enabled); | |
302 | self->read.time_running = bswap_64(self->read.time_running); | |
303 | self->read.id = bswap_64(self->read.id); | |
304 | } | |
305 | ||
2c46dbb5 TZ |
306 | static void event__attr_swap(event_t *self) |
307 | { | |
308 | size_t size; | |
309 | ||
310 | self->attr.attr.type = bswap_32(self->attr.attr.type); | |
311 | self->attr.attr.size = bswap_32(self->attr.attr.size); | |
312 | self->attr.attr.config = bswap_64(self->attr.attr.config); | |
313 | self->attr.attr.sample_period = bswap_64(self->attr.attr.sample_period); | |
314 | self->attr.attr.sample_type = bswap_64(self->attr.attr.sample_type); | |
315 | self->attr.attr.read_format = bswap_64(self->attr.attr.read_format); | |
316 | self->attr.attr.wakeup_events = bswap_32(self->attr.attr.wakeup_events); | |
317 | self->attr.attr.bp_type = bswap_32(self->attr.attr.bp_type); | |
318 | self->attr.attr.bp_addr = bswap_64(self->attr.attr.bp_addr); | |
319 | self->attr.attr.bp_len = bswap_64(self->attr.attr.bp_len); | |
320 | ||
321 | size = self->header.size; | |
322 | size -= (void *)&self->attr.id - (void *)self; | |
323 | mem_bswap_64(self->attr.id, size); | |
324 | } | |
325 | ||
cd19a035 TZ |
326 | static void event__event_type_swap(event_t *self) |
327 | { | |
328 | self->event_type.event_type.event_id = | |
329 | bswap_64(self->event_type.event_type.event_id); | |
330 | } | |
331 | ||
9215545e TZ |
332 | static void event__tracing_data_swap(event_t *self) |
333 | { | |
334 | self->tracing_data.size = bswap_32(self->tracing_data.size); | |
335 | } | |
336 | ||
ba21594c ACM |
337 | typedef void (*event__swap_op)(event_t *self); |
338 | ||
339 | static event__swap_op event__swap_ops[] = { | |
340 | [PERF_RECORD_MMAP] = event__mmap_swap, | |
341 | [PERF_RECORD_COMM] = event__comm_swap, | |
342 | [PERF_RECORD_FORK] = event__task_swap, | |
343 | [PERF_RECORD_EXIT] = event__task_swap, | |
344 | [PERF_RECORD_LOST] = event__all64_swap, | |
345 | [PERF_RECORD_READ] = event__read_swap, | |
346 | [PERF_RECORD_SAMPLE] = event__all64_swap, | |
2c46dbb5 | 347 | [PERF_RECORD_HEADER_ATTR] = event__attr_swap, |
cd19a035 | 348 | [PERF_RECORD_HEADER_EVENT_TYPE] = event__event_type_swap, |
9215545e | 349 | [PERF_RECORD_HEADER_TRACING_DATA] = event__tracing_data_swap, |
c7929e47 | 350 | [PERF_RECORD_HEADER_BUILD_ID] = NULL, |
8dc58101 | 351 | [PERF_RECORD_HEADER_MAX] = NULL, |
ba21594c ACM |
352 | }; |
353 | ||
c61e52ee FW |
354 | struct sample_queue { |
355 | u64 timestamp; | |
356 | struct sample_event *event; | |
357 | struct list_head list; | |
358 | }; | |
359 | ||
c61e52ee FW |
360 | static void flush_sample_queue(struct perf_session *s, |
361 | struct perf_event_ops *ops) | |
362 | { | |
363 | struct list_head *head = &s->ordered_samples.samples_head; | |
d6b17beb | 364 | u64 limit = s->ordered_samples.next_flush; |
c61e52ee FW |
365 | struct sample_queue *tmp, *iter; |
366 | ||
d6b17beb | 367 | if (!ops->ordered_samples || !limit) |
c61e52ee FW |
368 | return; |
369 | ||
370 | list_for_each_entry_safe(iter, tmp, head, list) { | |
371 | if (iter->timestamp > limit) | |
372 | return; | |
373 | ||
374 | if (iter == s->ordered_samples.last_inserted) | |
375 | s->ordered_samples.last_inserted = NULL; | |
376 | ||
377 | ops->sample((event_t *)iter->event, s); | |
378 | ||
379 | s->ordered_samples.last_flush = iter->timestamp; | |
380 | list_del(&iter->list); | |
381 | free(iter->event); | |
382 | free(iter); | |
383 | } | |
384 | } | |
385 | ||
d6b17beb FW |
386 | /* |
387 | * When perf record finishes a pass on every buffers, it records this pseudo | |
388 | * event. | |
389 | * We record the max timestamp t found in the pass n. | |
390 | * Assuming these timestamps are monotonic across cpus, we know that if | |
391 | * a buffer still has events with timestamps below t, they will be all | |
392 | * available and then read in the pass n + 1. | |
393 | * Hence when we start to read the pass n + 2, we can safely flush every | |
394 | * events with timestamps below t. | |
395 | * | |
396 | * ============ PASS n ================= | |
397 | * CPU 0 | CPU 1 | |
398 | * | | |
399 | * cnt1 timestamps | cnt2 timestamps | |
400 | * 1 | 2 | |
401 | * 2 | 3 | |
402 | * - | 4 <--- max recorded | |
403 | * | |
404 | * ============ PASS n + 1 ============== | |
405 | * CPU 0 | CPU 1 | |
406 | * | | |
407 | * cnt1 timestamps | cnt2 timestamps | |
408 | * 3 | 5 | |
409 | * 4 | 6 | |
410 | * 5 | 7 <---- max recorded | |
411 | * | |
412 | * Flush every events below timestamp 4 | |
413 | * | |
414 | * ============ PASS n + 2 ============== | |
415 | * CPU 0 | CPU 1 | |
416 | * | | |
417 | * cnt1 timestamps | cnt2 timestamps | |
418 | * 6 | 8 | |
419 | * 7 | 9 | |
420 | * - | 10 | |
421 | * | |
422 | * Flush every events below timestamp 7 | |
423 | * etc... | |
424 | */ | |
425 | static int process_finished_round(event_t *event __used, | |
426 | struct perf_session *session, | |
427 | struct perf_event_ops *ops) | |
428 | { | |
429 | flush_sample_queue(session, ops); | |
430 | session->ordered_samples.next_flush = session->ordered_samples.max_timestamp; | |
431 | ||
432 | return 0; | |
433 | } | |
434 | ||
c61e52ee FW |
435 | static void __queue_sample_end(struct sample_queue *new, struct list_head *head) |
436 | { | |
437 | struct sample_queue *iter; | |
438 | ||
439 | list_for_each_entry_reverse(iter, head, list) { | |
440 | if (iter->timestamp < new->timestamp) { | |
441 | list_add(&new->list, &iter->list); | |
442 | return; | |
443 | } | |
444 | } | |
445 | ||
446 | list_add(&new->list, head); | |
447 | } | |
448 | ||
449 | static void __queue_sample_before(struct sample_queue *new, | |
450 | struct sample_queue *iter, | |
451 | struct list_head *head) | |
452 | { | |
453 | list_for_each_entry_continue_reverse(iter, head, list) { | |
454 | if (iter->timestamp < new->timestamp) { | |
455 | list_add(&new->list, &iter->list); | |
456 | return; | |
457 | } | |
458 | } | |
459 | ||
460 | list_add(&new->list, head); | |
461 | } | |
462 | ||
463 | static void __queue_sample_after(struct sample_queue *new, | |
464 | struct sample_queue *iter, | |
465 | struct list_head *head) | |
466 | { | |
467 | list_for_each_entry_continue(iter, head, list) { | |
468 | if (iter->timestamp > new->timestamp) { | |
469 | list_add_tail(&new->list, &iter->list); | |
470 | return; | |
471 | } | |
472 | } | |
473 | list_add_tail(&new->list, head); | |
474 | } | |
475 | ||
476 | /* The queue is ordered by time */ | |
477 | static void __queue_sample_event(struct sample_queue *new, | |
478 | struct perf_session *s) | |
479 | { | |
480 | struct sample_queue *last_inserted = s->ordered_samples.last_inserted; | |
481 | struct list_head *head = &s->ordered_samples.samples_head; | |
482 | ||
483 | ||
484 | if (!last_inserted) { | |
485 | __queue_sample_end(new, head); | |
486 | return; | |
487 | } | |
488 | ||
489 | /* | |
490 | * Most of the time the current event has a timestamp | |
491 | * very close to the last event inserted, unless we just switched | |
492 | * to another event buffer. Having a sorting based on a list and | |
493 | * on the last inserted event that is close to the current one is | |
494 | * probably more efficient than an rbtree based sorting. | |
495 | */ | |
496 | if (last_inserted->timestamp >= new->timestamp) | |
497 | __queue_sample_before(new, last_inserted, head); | |
498 | else | |
499 | __queue_sample_after(new, last_inserted, head); | |
500 | } | |
501 | ||
502 | static int queue_sample_event(event_t *event, struct sample_data *data, | |
d6b17beb | 503 | struct perf_session *s) |
c61e52ee FW |
504 | { |
505 | u64 timestamp = data->time; | |
506 | struct sample_queue *new; | |
c61e52ee FW |
507 | |
508 | ||
c61e52ee FW |
509 | if (timestamp < s->ordered_samples.last_flush) { |
510 | printf("Warning: Timestamp below last timeslice flush\n"); | |
511 | return -EINVAL; | |
512 | } | |
513 | ||
514 | new = malloc(sizeof(*new)); | |
515 | if (!new) | |
516 | return -ENOMEM; | |
517 | ||
518 | new->timestamp = timestamp; | |
519 | ||
520 | new->event = malloc(event->header.size); | |
521 | if (!new->event) { | |
522 | free(new); | |
523 | return -ENOMEM; | |
524 | } | |
525 | ||
526 | memcpy(new->event, event, event->header.size); | |
527 | ||
528 | __queue_sample_event(new, s); | |
529 | s->ordered_samples.last_inserted = new; | |
530 | ||
d6b17beb FW |
531 | if (new->timestamp > s->ordered_samples.max_timestamp) |
532 | s->ordered_samples.max_timestamp = new->timestamp; | |
c61e52ee FW |
533 | |
534 | return 0; | |
535 | } | |
536 | ||
537 | static int perf_session__process_sample(event_t *event, struct perf_session *s, | |
538 | struct perf_event_ops *ops) | |
539 | { | |
540 | struct sample_data data; | |
541 | ||
542 | if (!ops->ordered_samples) | |
543 | return ops->sample(event, s); | |
544 | ||
545 | bzero(&data, sizeof(struct sample_data)); | |
546 | event__parse_sample(event, s->sample_type, &data); | |
547 | ||
d6b17beb | 548 | queue_sample_event(event, &data, s); |
c61e52ee FW |
549 | |
550 | return 0; | |
551 | } | |
552 | ||
06aae590 ACM |
553 | static int perf_session__process_event(struct perf_session *self, |
554 | event_t *event, | |
555 | struct perf_event_ops *ops, | |
ba21594c | 556 | u64 offset, u64 head) |
06aae590 ACM |
557 | { |
558 | trace_event(event); | |
559 | ||
8dc58101 | 560 | if (event->header.type < PERF_RECORD_HEADER_MAX) { |
ba21594c | 561 | dump_printf("%#Lx [%#x]: PERF_RECORD_%s", |
0d755034 | 562 | offset + head, event->header.size, |
06aae590 | 563 | event__name[event->header.type]); |
cee75ac7 | 564 | hists__inc_nr_events(&self->hists, event->header.type); |
06aae590 ACM |
565 | } |
566 | ||
ba21594c ACM |
567 | if (self->header.needs_swap && event__swap_ops[event->header.type]) |
568 | event__swap_ops[event->header.type](event); | |
569 | ||
06aae590 ACM |
570 | switch (event->header.type) { |
571 | case PERF_RECORD_SAMPLE: | |
c61e52ee | 572 | return perf_session__process_sample(event, self, ops); |
06aae590 | 573 | case PERF_RECORD_MMAP: |
55aa640f | 574 | return ops->mmap(event, self); |
06aae590 | 575 | case PERF_RECORD_COMM: |
55aa640f | 576 | return ops->comm(event, self); |
06aae590 | 577 | case PERF_RECORD_FORK: |
55aa640f | 578 | return ops->fork(event, self); |
06aae590 | 579 | case PERF_RECORD_EXIT: |
55aa640f | 580 | return ops->exit(event, self); |
06aae590 | 581 | case PERF_RECORD_LOST: |
55aa640f | 582 | return ops->lost(event, self); |
06aae590 | 583 | case PERF_RECORD_READ: |
55aa640f | 584 | return ops->read(event, self); |
06aae590 | 585 | case PERF_RECORD_THROTTLE: |
55aa640f | 586 | return ops->throttle(event, self); |
06aae590 | 587 | case PERF_RECORD_UNTHROTTLE: |
55aa640f | 588 | return ops->unthrottle(event, self); |
2c46dbb5 TZ |
589 | case PERF_RECORD_HEADER_ATTR: |
590 | return ops->attr(event, self); | |
cd19a035 TZ |
591 | case PERF_RECORD_HEADER_EVENT_TYPE: |
592 | return ops->event_type(event, self); | |
9215545e TZ |
593 | case PERF_RECORD_HEADER_TRACING_DATA: |
594 | /* setup for reading amidst mmap */ | |
595 | lseek(self->fd, offset + head, SEEK_SET); | |
596 | return ops->tracing_data(event, self); | |
c7929e47 TZ |
597 | case PERF_RECORD_HEADER_BUILD_ID: |
598 | return ops->build_id(event, self); | |
d6b17beb FW |
599 | case PERF_RECORD_FINISHED_ROUND: |
600 | return ops->finished_round(event, self, ops); | |
06aae590 | 601 | default: |
c8446b9b | 602 | ++self->hists.stats.nr_unknown_events; |
06aae590 ACM |
603 | return -1; |
604 | } | |
605 | } | |
606 | ||
ba21594c ACM |
607 | void perf_event_header__bswap(struct perf_event_header *self) |
608 | { | |
609 | self->type = bswap_32(self->type); | |
610 | self->misc = bswap_16(self->misc); | |
611 | self->size = bswap_16(self->size); | |
612 | } | |
613 | ||
06aae590 ACM |
614 | static struct thread *perf_session__register_idle_thread(struct perf_session *self) |
615 | { | |
616 | struct thread *thread = perf_session__findnew(self, 0); | |
617 | ||
618 | if (thread == NULL || thread__set_comm(thread, "swapper")) { | |
619 | pr_err("problem inserting idle task.\n"); | |
620 | thread = NULL; | |
621 | } | |
622 | ||
623 | return thread; | |
624 | } | |
625 | ||
8dc58101 TZ |
626 | int do_read(int fd, void *buf, size_t size) |
627 | { | |
628 | void *buf_start = buf; | |
629 | ||
630 | while (size) { | |
631 | int ret = read(fd, buf, size); | |
632 | ||
633 | if (ret <= 0) | |
634 | return ret; | |
635 | ||
636 | size -= ret; | |
637 | buf += ret; | |
638 | } | |
639 | ||
640 | return buf - buf_start; | |
641 | } | |
642 | ||
643 | #define session_done() (*(volatile int *)(&session_done)) | |
644 | volatile int session_done; | |
645 | ||
646 | static int __perf_session__process_pipe_events(struct perf_session *self, | |
647 | struct perf_event_ops *ops) | |
648 | { | |
649 | event_t event; | |
650 | uint32_t size; | |
651 | int skip = 0; | |
652 | u64 head; | |
653 | int err; | |
654 | void *p; | |
655 | ||
656 | perf_event_ops__fill_defaults(ops); | |
657 | ||
658 | head = 0; | |
659 | more: | |
660 | err = do_read(self->fd, &event, sizeof(struct perf_event_header)); | |
661 | if (err <= 0) { | |
662 | if (err == 0) | |
663 | goto done; | |
664 | ||
665 | pr_err("failed to read event header\n"); | |
666 | goto out_err; | |
667 | } | |
668 | ||
669 | if (self->header.needs_swap) | |
670 | perf_event_header__bswap(&event.header); | |
671 | ||
672 | size = event.header.size; | |
673 | if (size == 0) | |
674 | size = 8; | |
675 | ||
676 | p = &event; | |
677 | p += sizeof(struct perf_event_header); | |
678 | ||
794e43b5 TZ |
679 | if (size - sizeof(struct perf_event_header)) { |
680 | err = do_read(self->fd, p, | |
681 | size - sizeof(struct perf_event_header)); | |
682 | if (err <= 0) { | |
683 | if (err == 0) { | |
684 | pr_err("unexpected end of event stream\n"); | |
685 | goto done; | |
686 | } | |
8dc58101 | 687 | |
794e43b5 TZ |
688 | pr_err("failed to read event data\n"); |
689 | goto out_err; | |
690 | } | |
8dc58101 TZ |
691 | } |
692 | ||
693 | if (size == 0 || | |
694 | (skip = perf_session__process_event(self, &event, ops, | |
695 | 0, head)) < 0) { | |
696 | dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n", | |
697 | head, event.header.size, event.header.type); | |
698 | /* | |
699 | * assume we lost track of the stream, check alignment, and | |
700 | * increment a single u64 in the hope to catch on again 'soon'. | |
701 | */ | |
702 | if (unlikely(head & 7)) | |
703 | head &= ~7ULL; | |
704 | ||
705 | size = 8; | |
706 | } | |
707 | ||
708 | head += size; | |
709 | ||
710 | dump_printf("\n%#Lx [%#x]: event: %d\n", | |
711 | head, event.header.size, event.header.type); | |
712 | ||
713 | if (skip > 0) | |
714 | head += skip; | |
715 | ||
716 | if (!session_done()) | |
717 | goto more; | |
718 | done: | |
719 | err = 0; | |
720 | out_err: | |
721 | return err; | |
722 | } | |
723 | ||
6122e4e4 ACM |
724 | int __perf_session__process_events(struct perf_session *self, |
725 | u64 data_offset, u64 data_size, | |
726 | u64 file_size, struct perf_event_ops *ops) | |
06aae590 | 727 | { |
ba21594c ACM |
728 | int err, mmap_prot, mmap_flags; |
729 | u64 head, shift; | |
730 | u64 offset = 0; | |
06aae590 ACM |
731 | size_t page_size; |
732 | event_t *event; | |
733 | uint32_t size; | |
734 | char *buf; | |
5f4d3f88 ACM |
735 | struct ui_progress *progress = ui_progress__new("Processing events...", |
736 | self->size); | |
737 | if (progress == NULL) | |
738 | return -1; | |
06aae590 | 739 | |
06aae590 ACM |
740 | perf_event_ops__fill_defaults(ops); |
741 | ||
1b75962e | 742 | page_size = sysconf(_SC_PAGESIZE); |
06aae590 | 743 | |
6122e4e4 | 744 | head = data_offset; |
06aae590 ACM |
745 | shift = page_size * (head / page_size); |
746 | offset += shift; | |
747 | head -= shift; | |
748 | ||
ba21594c ACM |
749 | mmap_prot = PROT_READ; |
750 | mmap_flags = MAP_SHARED; | |
751 | ||
752 | if (self->header.needs_swap) { | |
753 | mmap_prot |= PROT_WRITE; | |
754 | mmap_flags = MAP_PRIVATE; | |
755 | } | |
06aae590 | 756 | remap: |
ba21594c ACM |
757 | buf = mmap(NULL, page_size * self->mmap_window, mmap_prot, |
758 | mmap_flags, self->fd, offset); | |
06aae590 ACM |
759 | if (buf == MAP_FAILED) { |
760 | pr_err("failed to mmap file\n"); | |
761 | err = -errno; | |
762 | goto out_err; | |
763 | } | |
764 | ||
765 | more: | |
766 | event = (event_t *)(buf + head); | |
5f4d3f88 | 767 | ui_progress__update(progress, offset); |
06aae590 | 768 | |
ba21594c ACM |
769 | if (self->header.needs_swap) |
770 | perf_event_header__bswap(&event->header); | |
06aae590 ACM |
771 | size = event->header.size; |
772 | if (size == 0) | |
773 | size = 8; | |
774 | ||
775 | if (head + event->header.size >= page_size * self->mmap_window) { | |
776 | int munmap_ret; | |
777 | ||
778 | shift = page_size * (head / page_size); | |
779 | ||
780 | munmap_ret = munmap(buf, page_size * self->mmap_window); | |
781 | assert(munmap_ret == 0); | |
782 | ||
783 | offset += shift; | |
784 | head -= shift; | |
785 | goto remap; | |
786 | } | |
787 | ||
788 | size = event->header.size; | |
789 | ||
ba21594c | 790 | dump_printf("\n%#Lx [%#x]: event: %d\n", |
0d755034 | 791 | offset + head, event->header.size, event->header.type); |
06aae590 ACM |
792 | |
793 | if (size == 0 || | |
794 | perf_session__process_event(self, event, ops, offset, head) < 0) { | |
ba21594c | 795 | dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n", |
0d755034 | 796 | offset + head, event->header.size, |
06aae590 ACM |
797 | event->header.type); |
798 | /* | |
799 | * assume we lost track of the stream, check alignment, and | |
800 | * increment a single u64 in the hope to catch on again 'soon'. | |
801 | */ | |
802 | if (unlikely(head & 7)) | |
803 | head &= ~7ULL; | |
804 | ||
805 | size = 8; | |
806 | } | |
807 | ||
808 | head += size; | |
809 | ||
6122e4e4 | 810 | if (offset + head >= data_offset + data_size) |
06aae590 ACM |
811 | goto done; |
812 | ||
6122e4e4 | 813 | if (offset + head < file_size) |
06aae590 ACM |
814 | goto more; |
815 | done: | |
816 | err = 0; | |
c61e52ee | 817 | /* do the final flush for ordered samples */ |
d6b17beb | 818 | self->ordered_samples.next_flush = ULLONG_MAX; |
c61e52ee | 819 | flush_sample_queue(self, ops); |
06aae590 | 820 | out_err: |
5f4d3f88 | 821 | ui_progress__delete(progress); |
06aae590 ACM |
822 | return err; |
823 | } | |
27295592 | 824 | |
6122e4e4 ACM |
825 | int perf_session__process_events(struct perf_session *self, |
826 | struct perf_event_ops *ops) | |
827 | { | |
828 | int err; | |
829 | ||
830 | if (perf_session__register_idle_thread(self) == NULL) | |
831 | return -ENOMEM; | |
832 | ||
833 | if (!symbol_conf.full_paths) { | |
834 | char bf[PATH_MAX]; | |
835 | ||
836 | if (getcwd(bf, sizeof(bf)) == NULL) { | |
837 | err = -errno; | |
838 | out_getcwd_err: | |
839 | pr_err("failed to get the current directory\n"); | |
840 | goto out_err; | |
841 | } | |
842 | self->cwd = strdup(bf); | |
843 | if (self->cwd == NULL) { | |
844 | err = -ENOMEM; | |
845 | goto out_getcwd_err; | |
846 | } | |
847 | self->cwdlen = strlen(self->cwd); | |
848 | } | |
849 | ||
8dc58101 TZ |
850 | if (!self->fd_pipe) |
851 | err = __perf_session__process_events(self, | |
852 | self->header.data_offset, | |
853 | self->header.data_size, | |
854 | self->size, ops); | |
855 | else | |
856 | err = __perf_session__process_pipe_events(self, ops); | |
6122e4e4 ACM |
857 | out_err: |
858 | return err; | |
859 | } | |
860 | ||
d549c769 | 861 | bool perf_session__has_traces(struct perf_session *self, const char *msg) |
27295592 ACM |
862 | { |
863 | if (!(self->sample_type & PERF_SAMPLE_RAW)) { | |
d549c769 ACM |
864 | pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); |
865 | return false; | |
27295592 ACM |
866 | } |
867 | ||
d549c769 | 868 | return true; |
27295592 | 869 | } |
56b03f3c | 870 | |
a1645ce1 | 871 | int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps, |
56b03f3c ACM |
872 | const char *symbol_name, |
873 | u64 addr) | |
874 | { | |
875 | char *bracket; | |
9de89fe7 | 876 | enum map_type i; |
a1645ce1 ZY |
877 | struct ref_reloc_sym *ref; |
878 | ||
879 | ref = zalloc(sizeof(struct ref_reloc_sym)); | |
880 | if (ref == NULL) | |
881 | return -ENOMEM; | |
56b03f3c | 882 | |
a1645ce1 ZY |
883 | ref->name = strdup(symbol_name); |
884 | if (ref->name == NULL) { | |
885 | free(ref); | |
56b03f3c | 886 | return -ENOMEM; |
a1645ce1 | 887 | } |
56b03f3c | 888 | |
a1645ce1 | 889 | bracket = strchr(ref->name, ']'); |
56b03f3c ACM |
890 | if (bracket) |
891 | *bracket = '\0'; | |
892 | ||
a1645ce1 | 893 | ref->addr = addr; |
9de89fe7 ACM |
894 | |
895 | for (i = 0; i < MAP__NR_TYPES; ++i) { | |
a1645ce1 ZY |
896 | struct kmap *kmap = map__kmap(maps[i]); |
897 | kmap->ref_reloc_sym = ref; | |
9de89fe7 ACM |
898 | } |
899 | ||
56b03f3c ACM |
900 | return 0; |
901 | } | |
1f626bc3 ACM |
902 | |
903 | size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) | |
904 | { | |
905 | return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) + | |
906 | __dsos__fprintf(&self->host_machine.user_dsos, fp) + | |
907 | machines__fprintf_dsos(&self->machines, fp); | |
908 | } | |
f869097e ACM |
909 | |
910 | size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp, | |
911 | bool with_hits) | |
912 | { | |
913 | size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits); | |
914 | return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits); | |
915 | } |