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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 | 29 | if (self->fd < 0) { |
0f2c3de2 AI |
30 | int err = errno; |
31 | ||
32 | pr_err("failed to open %s: %s", self->filename, strerror(err)); | |
33 | if (err == ENOENT && !strcmp(self->filename, "perf.data")) | |
94c744b6 ACM |
34 | pr_err(" (try 'perf record' first)"); |
35 | pr_err("\n"); | |
36 | return -errno; | |
37 | } | |
38 | ||
39 | if (fstat(self->fd, &input_stat) < 0) | |
40 | goto out_close; | |
41 | ||
42 | if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) { | |
43 | pr_err("file %s not owned by current user or root\n", | |
44 | self->filename); | |
45 | goto out_close; | |
46 | } | |
47 | ||
48 | if (!input_stat.st_size) { | |
49 | pr_info("zero-sized file (%s), nothing to do!\n", | |
50 | self->filename); | |
51 | goto out_close; | |
52 | } | |
53 | ||
8dc58101 | 54 | if (perf_header__read(self, self->fd) < 0) { |
94c744b6 ACM |
55 | pr_err("incompatible file format"); |
56 | goto out_close; | |
57 | } | |
58 | ||
59 | self->size = input_stat.st_size; | |
60 | return 0; | |
61 | ||
62 | out_close: | |
63 | close(self->fd); | |
64 | self->fd = -1; | |
65 | return -1; | |
66 | } | |
67 | ||
8dc58101 TZ |
68 | void perf_session__update_sample_type(struct perf_session *self) |
69 | { | |
70 | self->sample_type = perf_header__sample_type(&self->header); | |
71 | } | |
72 | ||
a1645ce1 ZY |
73 | int perf_session__create_kernel_maps(struct perf_session *self) |
74 | { | |
d118f8ba | 75 | int ret = machine__create_kernel_maps(&self->host_machine); |
a1645ce1 | 76 | |
a1645ce1 | 77 | if (ret >= 0) |
d118f8ba | 78 | ret = machines__create_guest_kernel_maps(&self->machines); |
a1645ce1 ZY |
79 | return ret; |
80 | } | |
81 | ||
454c407e | 82 | struct perf_session *perf_session__new(const char *filename, int mode, bool force, bool repipe) |
94c744b6 | 83 | { |
b3165f41 | 84 | size_t len = filename ? strlen(filename) + 1 : 0; |
94c744b6 ACM |
85 | struct perf_session *self = zalloc(sizeof(*self) + len); |
86 | ||
87 | if (self == NULL) | |
88 | goto out; | |
89 | ||
90 | if (perf_header__init(&self->header) < 0) | |
4aa65636 | 91 | goto out_free; |
94c744b6 ACM |
92 | |
93 | memcpy(self->filename, filename, len); | |
b3165f41 | 94 | self->threads = RB_ROOT; |
720a3aeb | 95 | INIT_LIST_HEAD(&self->dead_threads); |
1c02c4d2 | 96 | self->hists_tree = RB_ROOT; |
b3165f41 | 97 | self->last_match = NULL; |
ec913369 | 98 | self->mmap_window = 32; |
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 | ||
d65a458b ACM |
127 | static void perf_session__delete_dead_threads(struct perf_session *self) |
128 | { | |
129 | struct thread *n, *t; | |
130 | ||
131 | list_for_each_entry_safe(t, n, &self->dead_threads, node) { | |
132 | list_del(&t->node); | |
133 | thread__delete(t); | |
134 | } | |
135 | } | |
136 | ||
137 | static void perf_session__delete_threads(struct perf_session *self) | |
138 | { | |
139 | struct rb_node *nd = rb_first(&self->threads); | |
140 | ||
141 | while (nd) { | |
142 | struct thread *t = rb_entry(nd, struct thread, rb_node); | |
143 | ||
144 | rb_erase(&t->rb_node, &self->threads); | |
145 | nd = rb_next(nd); | |
146 | thread__delete(t); | |
147 | } | |
148 | } | |
149 | ||
94c744b6 ACM |
150 | void perf_session__delete(struct perf_session *self) |
151 | { | |
152 | perf_header__exit(&self->header); | |
d65a458b ACM |
153 | perf_session__delete_dead_threads(self); |
154 | perf_session__delete_threads(self); | |
155 | machine__exit(&self->host_machine); | |
94c744b6 ACM |
156 | close(self->fd); |
157 | free(self); | |
158 | } | |
a328626b | 159 | |
720a3aeb ACM |
160 | void perf_session__remove_thread(struct perf_session *self, struct thread *th) |
161 | { | |
162 | rb_erase(&th->rb_node, &self->threads); | |
163 | /* | |
164 | * We may have references to this thread, for instance in some hist_entry | |
165 | * instances, so just move them to a separate list. | |
166 | */ | |
167 | list_add_tail(&th->node, &self->dead_threads); | |
168 | } | |
169 | ||
a328626b ACM |
170 | static bool symbol__match_parent_regex(struct symbol *sym) |
171 | { | |
172 | if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0)) | |
173 | return 1; | |
174 | ||
175 | return 0; | |
176 | } | |
177 | ||
b3c9ac08 ACM |
178 | struct map_symbol *perf_session__resolve_callchain(struct perf_session *self, |
179 | struct thread *thread, | |
180 | struct ip_callchain *chain, | |
181 | struct symbol **parent) | |
a328626b ACM |
182 | { |
183 | u8 cpumode = PERF_RECORD_MISC_USER; | |
a328626b | 184 | unsigned int i; |
ad5b217b | 185 | struct map_symbol *syms = calloc(chain->nr, sizeof(*syms)); |
a328626b | 186 | |
ad5b217b ACM |
187 | if (!syms) |
188 | return NULL; | |
a328626b ACM |
189 | |
190 | for (i = 0; i < chain->nr; i++) { | |
191 | u64 ip = chain->ips[i]; | |
192 | struct addr_location al; | |
193 | ||
194 | if (ip >= PERF_CONTEXT_MAX) { | |
195 | switch (ip) { | |
196 | case PERF_CONTEXT_HV: | |
197 | cpumode = PERF_RECORD_MISC_HYPERVISOR; break; | |
198 | case PERF_CONTEXT_KERNEL: | |
199 | cpumode = PERF_RECORD_MISC_KERNEL; break; | |
200 | case PERF_CONTEXT_USER: | |
201 | cpumode = PERF_RECORD_MISC_USER; break; | |
202 | default: | |
203 | break; | |
204 | } | |
205 | continue; | |
206 | } | |
207 | ||
a1645ce1 | 208 | al.filtered = false; |
a328626b | 209 | thread__find_addr_location(thread, self, cpumode, |
a1645ce1 | 210 | MAP__FUNCTION, thread->pid, ip, &al, NULL); |
a328626b ACM |
211 | if (al.sym != NULL) { |
212 | if (sort__has_parent && !*parent && | |
213 | symbol__match_parent_regex(al.sym)) | |
214 | *parent = al.sym; | |
d599db3f | 215 | if (!symbol_conf.use_callchain) |
a328626b | 216 | break; |
b3c9ac08 ACM |
217 | syms[i].map = al.map; |
218 | syms[i].sym = al.sym; | |
a328626b ACM |
219 | } |
220 | } | |
221 | ||
222 | return syms; | |
223 | } | |
06aae590 ACM |
224 | |
225 | static int process_event_stub(event_t *event __used, | |
226 | struct perf_session *session __used) | |
227 | { | |
228 | dump_printf(": unhandled!\n"); | |
229 | return 0; | |
230 | } | |
231 | ||
d6b17beb FW |
232 | static int process_finished_round_stub(event_t *event __used, |
233 | struct perf_session *session __used, | |
234 | struct perf_event_ops *ops __used) | |
235 | { | |
236 | dump_printf(": unhandled!\n"); | |
237 | return 0; | |
238 | } | |
239 | ||
240 | static int process_finished_round(event_t *event, | |
241 | struct perf_session *session, | |
242 | struct perf_event_ops *ops); | |
243 | ||
06aae590 ACM |
244 | static void perf_event_ops__fill_defaults(struct perf_event_ops *handler) |
245 | { | |
55aa640f ACM |
246 | if (handler->sample == NULL) |
247 | handler->sample = process_event_stub; | |
248 | if (handler->mmap == NULL) | |
249 | handler->mmap = process_event_stub; | |
250 | if (handler->comm == NULL) | |
251 | handler->comm = process_event_stub; | |
252 | if (handler->fork == NULL) | |
253 | handler->fork = process_event_stub; | |
254 | if (handler->exit == NULL) | |
255 | handler->exit = process_event_stub; | |
256 | if (handler->lost == NULL) | |
257 | handler->lost = process_event_stub; | |
258 | if (handler->read == NULL) | |
259 | handler->read = process_event_stub; | |
260 | if (handler->throttle == NULL) | |
261 | handler->throttle = process_event_stub; | |
262 | if (handler->unthrottle == NULL) | |
263 | handler->unthrottle = process_event_stub; | |
2c46dbb5 TZ |
264 | if (handler->attr == NULL) |
265 | handler->attr = process_event_stub; | |
cd19a035 TZ |
266 | if (handler->event_type == NULL) |
267 | handler->event_type = process_event_stub; | |
9215545e TZ |
268 | if (handler->tracing_data == NULL) |
269 | handler->tracing_data = process_event_stub; | |
c7929e47 TZ |
270 | if (handler->build_id == NULL) |
271 | handler->build_id = process_event_stub; | |
d6b17beb FW |
272 | if (handler->finished_round == NULL) { |
273 | if (handler->ordered_samples) | |
274 | handler->finished_round = process_finished_round; | |
275 | else | |
276 | handler->finished_round = process_finished_round_stub; | |
277 | } | |
06aae590 ACM |
278 | } |
279 | ||
ba21594c ACM |
280 | void mem_bswap_64(void *src, int byte_size) |
281 | { | |
282 | u64 *m = src; | |
283 | ||
284 | while (byte_size > 0) { | |
285 | *m = bswap_64(*m); | |
286 | byte_size -= sizeof(u64); | |
287 | ++m; | |
288 | } | |
289 | } | |
290 | ||
291 | static void event__all64_swap(event_t *self) | |
292 | { | |
293 | struct perf_event_header *hdr = &self->header; | |
294 | mem_bswap_64(hdr + 1, self->header.size - sizeof(*hdr)); | |
295 | } | |
296 | ||
297 | static void event__comm_swap(event_t *self) | |
298 | { | |
299 | self->comm.pid = bswap_32(self->comm.pid); | |
300 | self->comm.tid = bswap_32(self->comm.tid); | |
301 | } | |
302 | ||
303 | static void event__mmap_swap(event_t *self) | |
304 | { | |
305 | self->mmap.pid = bswap_32(self->mmap.pid); | |
306 | self->mmap.tid = bswap_32(self->mmap.tid); | |
307 | self->mmap.start = bswap_64(self->mmap.start); | |
308 | self->mmap.len = bswap_64(self->mmap.len); | |
309 | self->mmap.pgoff = bswap_64(self->mmap.pgoff); | |
310 | } | |
311 | ||
312 | static void event__task_swap(event_t *self) | |
313 | { | |
314 | self->fork.pid = bswap_32(self->fork.pid); | |
315 | self->fork.tid = bswap_32(self->fork.tid); | |
316 | self->fork.ppid = bswap_32(self->fork.ppid); | |
317 | self->fork.ptid = bswap_32(self->fork.ptid); | |
318 | self->fork.time = bswap_64(self->fork.time); | |
319 | } | |
320 | ||
321 | static void event__read_swap(event_t *self) | |
322 | { | |
323 | self->read.pid = bswap_32(self->read.pid); | |
324 | self->read.tid = bswap_32(self->read.tid); | |
325 | self->read.value = bswap_64(self->read.value); | |
326 | self->read.time_enabled = bswap_64(self->read.time_enabled); | |
327 | self->read.time_running = bswap_64(self->read.time_running); | |
328 | self->read.id = bswap_64(self->read.id); | |
329 | } | |
330 | ||
2c46dbb5 TZ |
331 | static void event__attr_swap(event_t *self) |
332 | { | |
333 | size_t size; | |
334 | ||
335 | self->attr.attr.type = bswap_32(self->attr.attr.type); | |
336 | self->attr.attr.size = bswap_32(self->attr.attr.size); | |
337 | self->attr.attr.config = bswap_64(self->attr.attr.config); | |
338 | self->attr.attr.sample_period = bswap_64(self->attr.attr.sample_period); | |
339 | self->attr.attr.sample_type = bswap_64(self->attr.attr.sample_type); | |
340 | self->attr.attr.read_format = bswap_64(self->attr.attr.read_format); | |
341 | self->attr.attr.wakeup_events = bswap_32(self->attr.attr.wakeup_events); | |
342 | self->attr.attr.bp_type = bswap_32(self->attr.attr.bp_type); | |
343 | self->attr.attr.bp_addr = bswap_64(self->attr.attr.bp_addr); | |
344 | self->attr.attr.bp_len = bswap_64(self->attr.attr.bp_len); | |
345 | ||
346 | size = self->header.size; | |
347 | size -= (void *)&self->attr.id - (void *)self; | |
348 | mem_bswap_64(self->attr.id, size); | |
349 | } | |
350 | ||
cd19a035 TZ |
351 | static void event__event_type_swap(event_t *self) |
352 | { | |
353 | self->event_type.event_type.event_id = | |
354 | bswap_64(self->event_type.event_type.event_id); | |
355 | } | |
356 | ||
9215545e TZ |
357 | static void event__tracing_data_swap(event_t *self) |
358 | { | |
359 | self->tracing_data.size = bswap_32(self->tracing_data.size); | |
360 | } | |
361 | ||
ba21594c ACM |
362 | typedef void (*event__swap_op)(event_t *self); |
363 | ||
364 | static event__swap_op event__swap_ops[] = { | |
365 | [PERF_RECORD_MMAP] = event__mmap_swap, | |
366 | [PERF_RECORD_COMM] = event__comm_swap, | |
367 | [PERF_RECORD_FORK] = event__task_swap, | |
368 | [PERF_RECORD_EXIT] = event__task_swap, | |
369 | [PERF_RECORD_LOST] = event__all64_swap, | |
370 | [PERF_RECORD_READ] = event__read_swap, | |
371 | [PERF_RECORD_SAMPLE] = event__all64_swap, | |
2c46dbb5 | 372 | [PERF_RECORD_HEADER_ATTR] = event__attr_swap, |
cd19a035 | 373 | [PERF_RECORD_HEADER_EVENT_TYPE] = event__event_type_swap, |
9215545e | 374 | [PERF_RECORD_HEADER_TRACING_DATA] = event__tracing_data_swap, |
c7929e47 | 375 | [PERF_RECORD_HEADER_BUILD_ID] = NULL, |
8dc58101 | 376 | [PERF_RECORD_HEADER_MAX] = NULL, |
ba21594c ACM |
377 | }; |
378 | ||
c61e52ee FW |
379 | struct sample_queue { |
380 | u64 timestamp; | |
381 | struct sample_event *event; | |
382 | struct list_head list; | |
383 | }; | |
384 | ||
c61e52ee FW |
385 | static void flush_sample_queue(struct perf_session *s, |
386 | struct perf_event_ops *ops) | |
387 | { | |
388 | struct list_head *head = &s->ordered_samples.samples_head; | |
d6b17beb | 389 | u64 limit = s->ordered_samples.next_flush; |
c61e52ee FW |
390 | struct sample_queue *tmp, *iter; |
391 | ||
d6b17beb | 392 | if (!ops->ordered_samples || !limit) |
c61e52ee FW |
393 | return; |
394 | ||
395 | list_for_each_entry_safe(iter, tmp, head, list) { | |
396 | if (iter->timestamp > limit) | |
397 | return; | |
398 | ||
399 | if (iter == s->ordered_samples.last_inserted) | |
400 | s->ordered_samples.last_inserted = NULL; | |
401 | ||
402 | ops->sample((event_t *)iter->event, s); | |
403 | ||
404 | s->ordered_samples.last_flush = iter->timestamp; | |
405 | list_del(&iter->list); | |
406 | free(iter->event); | |
407 | free(iter); | |
408 | } | |
409 | } | |
410 | ||
d6b17beb FW |
411 | /* |
412 | * When perf record finishes a pass on every buffers, it records this pseudo | |
413 | * event. | |
414 | * We record the max timestamp t found in the pass n. | |
415 | * Assuming these timestamps are monotonic across cpus, we know that if | |
416 | * a buffer still has events with timestamps below t, they will be all | |
417 | * available and then read in the pass n + 1. | |
418 | * Hence when we start to read the pass n + 2, we can safely flush every | |
419 | * events with timestamps below t. | |
420 | * | |
421 | * ============ PASS n ================= | |
422 | * CPU 0 | CPU 1 | |
423 | * | | |
424 | * cnt1 timestamps | cnt2 timestamps | |
425 | * 1 | 2 | |
426 | * 2 | 3 | |
427 | * - | 4 <--- max recorded | |
428 | * | |
429 | * ============ PASS n + 1 ============== | |
430 | * CPU 0 | CPU 1 | |
431 | * | | |
432 | * cnt1 timestamps | cnt2 timestamps | |
433 | * 3 | 5 | |
434 | * 4 | 6 | |
435 | * 5 | 7 <---- max recorded | |
436 | * | |
437 | * Flush every events below timestamp 4 | |
438 | * | |
439 | * ============ PASS n + 2 ============== | |
440 | * CPU 0 | CPU 1 | |
441 | * | | |
442 | * cnt1 timestamps | cnt2 timestamps | |
443 | * 6 | 8 | |
444 | * 7 | 9 | |
445 | * - | 10 | |
446 | * | |
447 | * Flush every events below timestamp 7 | |
448 | * etc... | |
449 | */ | |
450 | static int process_finished_round(event_t *event __used, | |
451 | struct perf_session *session, | |
452 | struct perf_event_ops *ops) | |
453 | { | |
454 | flush_sample_queue(session, ops); | |
455 | session->ordered_samples.next_flush = session->ordered_samples.max_timestamp; | |
456 | ||
457 | return 0; | |
458 | } | |
459 | ||
c61e52ee FW |
460 | static void __queue_sample_end(struct sample_queue *new, struct list_head *head) |
461 | { | |
462 | struct sample_queue *iter; | |
463 | ||
464 | list_for_each_entry_reverse(iter, head, list) { | |
465 | if (iter->timestamp < new->timestamp) { | |
466 | list_add(&new->list, &iter->list); | |
467 | return; | |
468 | } | |
469 | } | |
470 | ||
471 | list_add(&new->list, head); | |
472 | } | |
473 | ||
474 | static void __queue_sample_before(struct sample_queue *new, | |
475 | struct sample_queue *iter, | |
476 | struct list_head *head) | |
477 | { | |
478 | list_for_each_entry_continue_reverse(iter, head, list) { | |
479 | if (iter->timestamp < new->timestamp) { | |
480 | list_add(&new->list, &iter->list); | |
481 | return; | |
482 | } | |
483 | } | |
484 | ||
485 | list_add(&new->list, head); | |
486 | } | |
487 | ||
488 | static void __queue_sample_after(struct sample_queue *new, | |
489 | struct sample_queue *iter, | |
490 | struct list_head *head) | |
491 | { | |
492 | list_for_each_entry_continue(iter, head, list) { | |
493 | if (iter->timestamp > new->timestamp) { | |
494 | list_add_tail(&new->list, &iter->list); | |
495 | return; | |
496 | } | |
497 | } | |
498 | list_add_tail(&new->list, head); | |
499 | } | |
500 | ||
501 | /* The queue is ordered by time */ | |
502 | static void __queue_sample_event(struct sample_queue *new, | |
503 | struct perf_session *s) | |
504 | { | |
505 | struct sample_queue *last_inserted = s->ordered_samples.last_inserted; | |
506 | struct list_head *head = &s->ordered_samples.samples_head; | |
507 | ||
508 | ||
509 | if (!last_inserted) { | |
510 | __queue_sample_end(new, head); | |
511 | return; | |
512 | } | |
513 | ||
514 | /* | |
515 | * Most of the time the current event has a timestamp | |
516 | * very close to the last event inserted, unless we just switched | |
517 | * to another event buffer. Having a sorting based on a list and | |
518 | * on the last inserted event that is close to the current one is | |
519 | * probably more efficient than an rbtree based sorting. | |
520 | */ | |
521 | if (last_inserted->timestamp >= new->timestamp) | |
522 | __queue_sample_before(new, last_inserted, head); | |
523 | else | |
524 | __queue_sample_after(new, last_inserted, head); | |
525 | } | |
526 | ||
527 | static int queue_sample_event(event_t *event, struct sample_data *data, | |
d6b17beb | 528 | struct perf_session *s) |
c61e52ee FW |
529 | { |
530 | u64 timestamp = data->time; | |
531 | struct sample_queue *new; | |
c61e52ee FW |
532 | |
533 | ||
c61e52ee FW |
534 | if (timestamp < s->ordered_samples.last_flush) { |
535 | printf("Warning: Timestamp below last timeslice flush\n"); | |
536 | return -EINVAL; | |
537 | } | |
538 | ||
539 | new = malloc(sizeof(*new)); | |
540 | if (!new) | |
541 | return -ENOMEM; | |
542 | ||
543 | new->timestamp = timestamp; | |
544 | ||
545 | new->event = malloc(event->header.size); | |
546 | if (!new->event) { | |
547 | free(new); | |
548 | return -ENOMEM; | |
549 | } | |
550 | ||
551 | memcpy(new->event, event, event->header.size); | |
552 | ||
553 | __queue_sample_event(new, s); | |
554 | s->ordered_samples.last_inserted = new; | |
555 | ||
d6b17beb FW |
556 | if (new->timestamp > s->ordered_samples.max_timestamp) |
557 | s->ordered_samples.max_timestamp = new->timestamp; | |
c61e52ee FW |
558 | |
559 | return 0; | |
560 | } | |
561 | ||
562 | static int perf_session__process_sample(event_t *event, struct perf_session *s, | |
563 | struct perf_event_ops *ops) | |
564 | { | |
565 | struct sample_data data; | |
566 | ||
567 | if (!ops->ordered_samples) | |
568 | return ops->sample(event, s); | |
569 | ||
570 | bzero(&data, sizeof(struct sample_data)); | |
571 | event__parse_sample(event, s->sample_type, &data); | |
572 | ||
d6b17beb | 573 | queue_sample_event(event, &data, s); |
c61e52ee FW |
574 | |
575 | return 0; | |
576 | } | |
577 | ||
06aae590 ACM |
578 | static int perf_session__process_event(struct perf_session *self, |
579 | event_t *event, | |
580 | struct perf_event_ops *ops, | |
ba21594c | 581 | u64 offset, u64 head) |
06aae590 ACM |
582 | { |
583 | trace_event(event); | |
584 | ||
8dc58101 | 585 | if (event->header.type < PERF_RECORD_HEADER_MAX) { |
ba21594c | 586 | dump_printf("%#Lx [%#x]: PERF_RECORD_%s", |
0d755034 | 587 | offset + head, event->header.size, |
06aae590 | 588 | event__name[event->header.type]); |
cee75ac7 | 589 | hists__inc_nr_events(&self->hists, event->header.type); |
06aae590 ACM |
590 | } |
591 | ||
ba21594c ACM |
592 | if (self->header.needs_swap && event__swap_ops[event->header.type]) |
593 | event__swap_ops[event->header.type](event); | |
594 | ||
06aae590 ACM |
595 | switch (event->header.type) { |
596 | case PERF_RECORD_SAMPLE: | |
c61e52ee | 597 | return perf_session__process_sample(event, self, ops); |
06aae590 | 598 | case PERF_RECORD_MMAP: |
55aa640f | 599 | return ops->mmap(event, self); |
06aae590 | 600 | case PERF_RECORD_COMM: |
55aa640f | 601 | return ops->comm(event, self); |
06aae590 | 602 | case PERF_RECORD_FORK: |
55aa640f | 603 | return ops->fork(event, self); |
06aae590 | 604 | case PERF_RECORD_EXIT: |
55aa640f | 605 | return ops->exit(event, self); |
06aae590 | 606 | case PERF_RECORD_LOST: |
55aa640f | 607 | return ops->lost(event, self); |
06aae590 | 608 | case PERF_RECORD_READ: |
55aa640f | 609 | return ops->read(event, self); |
06aae590 | 610 | case PERF_RECORD_THROTTLE: |
55aa640f | 611 | return ops->throttle(event, self); |
06aae590 | 612 | case PERF_RECORD_UNTHROTTLE: |
55aa640f | 613 | return ops->unthrottle(event, self); |
2c46dbb5 TZ |
614 | case PERF_RECORD_HEADER_ATTR: |
615 | return ops->attr(event, self); | |
cd19a035 TZ |
616 | case PERF_RECORD_HEADER_EVENT_TYPE: |
617 | return ops->event_type(event, self); | |
9215545e TZ |
618 | case PERF_RECORD_HEADER_TRACING_DATA: |
619 | /* setup for reading amidst mmap */ | |
620 | lseek(self->fd, offset + head, SEEK_SET); | |
621 | return ops->tracing_data(event, self); | |
c7929e47 TZ |
622 | case PERF_RECORD_HEADER_BUILD_ID: |
623 | return ops->build_id(event, self); | |
d6b17beb FW |
624 | case PERF_RECORD_FINISHED_ROUND: |
625 | return ops->finished_round(event, self, ops); | |
06aae590 | 626 | default: |
c8446b9b | 627 | ++self->hists.stats.nr_unknown_events; |
06aae590 ACM |
628 | return -1; |
629 | } | |
630 | } | |
631 | ||
ba21594c ACM |
632 | void perf_event_header__bswap(struct perf_event_header *self) |
633 | { | |
634 | self->type = bswap_32(self->type); | |
635 | self->misc = bswap_16(self->misc); | |
636 | self->size = bswap_16(self->size); | |
637 | } | |
638 | ||
06aae590 ACM |
639 | static struct thread *perf_session__register_idle_thread(struct perf_session *self) |
640 | { | |
641 | struct thread *thread = perf_session__findnew(self, 0); | |
642 | ||
643 | if (thread == NULL || thread__set_comm(thread, "swapper")) { | |
644 | pr_err("problem inserting idle task.\n"); | |
645 | thread = NULL; | |
646 | } | |
647 | ||
648 | return thread; | |
649 | } | |
650 | ||
8dc58101 TZ |
651 | int do_read(int fd, void *buf, size_t size) |
652 | { | |
653 | void *buf_start = buf; | |
654 | ||
655 | while (size) { | |
656 | int ret = read(fd, buf, size); | |
657 | ||
658 | if (ret <= 0) | |
659 | return ret; | |
660 | ||
661 | size -= ret; | |
662 | buf += ret; | |
663 | } | |
664 | ||
665 | return buf - buf_start; | |
666 | } | |
667 | ||
668 | #define session_done() (*(volatile int *)(&session_done)) | |
669 | volatile int session_done; | |
670 | ||
671 | static int __perf_session__process_pipe_events(struct perf_session *self, | |
672 | struct perf_event_ops *ops) | |
673 | { | |
674 | event_t event; | |
675 | uint32_t size; | |
676 | int skip = 0; | |
677 | u64 head; | |
678 | int err; | |
679 | void *p; | |
680 | ||
681 | perf_event_ops__fill_defaults(ops); | |
682 | ||
683 | head = 0; | |
684 | more: | |
685 | err = do_read(self->fd, &event, sizeof(struct perf_event_header)); | |
686 | if (err <= 0) { | |
687 | if (err == 0) | |
688 | goto done; | |
689 | ||
690 | pr_err("failed to read event header\n"); | |
691 | goto out_err; | |
692 | } | |
693 | ||
694 | if (self->header.needs_swap) | |
695 | perf_event_header__bswap(&event.header); | |
696 | ||
697 | size = event.header.size; | |
698 | if (size == 0) | |
699 | size = 8; | |
700 | ||
701 | p = &event; | |
702 | p += sizeof(struct perf_event_header); | |
703 | ||
794e43b5 TZ |
704 | if (size - sizeof(struct perf_event_header)) { |
705 | err = do_read(self->fd, p, | |
706 | size - sizeof(struct perf_event_header)); | |
707 | if (err <= 0) { | |
708 | if (err == 0) { | |
709 | pr_err("unexpected end of event stream\n"); | |
710 | goto done; | |
711 | } | |
8dc58101 | 712 | |
794e43b5 TZ |
713 | pr_err("failed to read event data\n"); |
714 | goto out_err; | |
715 | } | |
8dc58101 TZ |
716 | } |
717 | ||
718 | if (size == 0 || | |
719 | (skip = perf_session__process_event(self, &event, ops, | |
720 | 0, head)) < 0) { | |
721 | dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n", | |
722 | head, event.header.size, event.header.type); | |
723 | /* | |
724 | * assume we lost track of the stream, check alignment, and | |
725 | * increment a single u64 in the hope to catch on again 'soon'. | |
726 | */ | |
727 | if (unlikely(head & 7)) | |
728 | head &= ~7ULL; | |
729 | ||
730 | size = 8; | |
731 | } | |
732 | ||
733 | head += size; | |
734 | ||
735 | dump_printf("\n%#Lx [%#x]: event: %d\n", | |
736 | head, event.header.size, event.header.type); | |
737 | ||
738 | if (skip > 0) | |
739 | head += skip; | |
740 | ||
741 | if (!session_done()) | |
742 | goto more; | |
743 | done: | |
744 | err = 0; | |
745 | out_err: | |
746 | return err; | |
747 | } | |
748 | ||
6122e4e4 ACM |
749 | int __perf_session__process_events(struct perf_session *self, |
750 | u64 data_offset, u64 data_size, | |
751 | u64 file_size, struct perf_event_ops *ops) | |
06aae590 | 752 | { |
ba21594c ACM |
753 | int err, mmap_prot, mmap_flags; |
754 | u64 head, shift; | |
755 | u64 offset = 0; | |
06aae590 ACM |
756 | size_t page_size; |
757 | event_t *event; | |
758 | uint32_t size; | |
759 | char *buf; | |
5f4d3f88 ACM |
760 | struct ui_progress *progress = ui_progress__new("Processing events...", |
761 | self->size); | |
762 | if (progress == NULL) | |
763 | return -1; | |
06aae590 | 764 | |
06aae590 ACM |
765 | perf_event_ops__fill_defaults(ops); |
766 | ||
1b75962e | 767 | page_size = sysconf(_SC_PAGESIZE); |
06aae590 | 768 | |
6122e4e4 | 769 | head = data_offset; |
06aae590 ACM |
770 | shift = page_size * (head / page_size); |
771 | offset += shift; | |
772 | head -= shift; | |
773 | ||
ba21594c ACM |
774 | mmap_prot = PROT_READ; |
775 | mmap_flags = MAP_SHARED; | |
776 | ||
777 | if (self->header.needs_swap) { | |
778 | mmap_prot |= PROT_WRITE; | |
779 | mmap_flags = MAP_PRIVATE; | |
780 | } | |
06aae590 | 781 | remap: |
ba21594c ACM |
782 | buf = mmap(NULL, page_size * self->mmap_window, mmap_prot, |
783 | mmap_flags, self->fd, offset); | |
06aae590 ACM |
784 | if (buf == MAP_FAILED) { |
785 | pr_err("failed to mmap file\n"); | |
786 | err = -errno; | |
787 | goto out_err; | |
788 | } | |
789 | ||
790 | more: | |
791 | event = (event_t *)(buf + head); | |
5f4d3f88 | 792 | ui_progress__update(progress, offset); |
06aae590 | 793 | |
ba21594c ACM |
794 | if (self->header.needs_swap) |
795 | perf_event_header__bswap(&event->header); | |
06aae590 ACM |
796 | size = event->header.size; |
797 | if (size == 0) | |
798 | size = 8; | |
799 | ||
800 | if (head + event->header.size >= page_size * self->mmap_window) { | |
801 | int munmap_ret; | |
802 | ||
803 | shift = page_size * (head / page_size); | |
804 | ||
805 | munmap_ret = munmap(buf, page_size * self->mmap_window); | |
806 | assert(munmap_ret == 0); | |
807 | ||
808 | offset += shift; | |
809 | head -= shift; | |
810 | goto remap; | |
811 | } | |
812 | ||
813 | size = event->header.size; | |
814 | ||
ba21594c | 815 | dump_printf("\n%#Lx [%#x]: event: %d\n", |
0d755034 | 816 | offset + head, event->header.size, event->header.type); |
06aae590 ACM |
817 | |
818 | if (size == 0 || | |
819 | perf_session__process_event(self, event, ops, offset, head) < 0) { | |
ba21594c | 820 | dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n", |
0d755034 | 821 | offset + head, event->header.size, |
06aae590 ACM |
822 | event->header.type); |
823 | /* | |
824 | * assume we lost track of the stream, check alignment, and | |
825 | * increment a single u64 in the hope to catch on again 'soon'. | |
826 | */ | |
827 | if (unlikely(head & 7)) | |
828 | head &= ~7ULL; | |
829 | ||
830 | size = 8; | |
831 | } | |
832 | ||
833 | head += size; | |
834 | ||
6122e4e4 | 835 | if (offset + head >= data_offset + data_size) |
06aae590 ACM |
836 | goto done; |
837 | ||
6122e4e4 | 838 | if (offset + head < file_size) |
06aae590 ACM |
839 | goto more; |
840 | done: | |
841 | err = 0; | |
c61e52ee | 842 | /* do the final flush for ordered samples */ |
d6b17beb | 843 | self->ordered_samples.next_flush = ULLONG_MAX; |
c61e52ee | 844 | flush_sample_queue(self, ops); |
06aae590 | 845 | out_err: |
5f4d3f88 | 846 | ui_progress__delete(progress); |
06aae590 ACM |
847 | return err; |
848 | } | |
27295592 | 849 | |
6122e4e4 ACM |
850 | int perf_session__process_events(struct perf_session *self, |
851 | struct perf_event_ops *ops) | |
852 | { | |
853 | int err; | |
854 | ||
855 | if (perf_session__register_idle_thread(self) == NULL) | |
856 | return -ENOMEM; | |
857 | ||
8dc58101 TZ |
858 | if (!self->fd_pipe) |
859 | err = __perf_session__process_events(self, | |
860 | self->header.data_offset, | |
861 | self->header.data_size, | |
862 | self->size, ops); | |
863 | else | |
864 | err = __perf_session__process_pipe_events(self, ops); | |
88ca895d | 865 | |
6122e4e4 ACM |
866 | return err; |
867 | } | |
868 | ||
d549c769 | 869 | bool perf_session__has_traces(struct perf_session *self, const char *msg) |
27295592 ACM |
870 | { |
871 | if (!(self->sample_type & PERF_SAMPLE_RAW)) { | |
d549c769 ACM |
872 | pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); |
873 | return false; | |
27295592 ACM |
874 | } |
875 | ||
d549c769 | 876 | return true; |
27295592 | 877 | } |
56b03f3c | 878 | |
a1645ce1 | 879 | int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps, |
56b03f3c ACM |
880 | const char *symbol_name, |
881 | u64 addr) | |
882 | { | |
883 | char *bracket; | |
9de89fe7 | 884 | enum map_type i; |
a1645ce1 ZY |
885 | struct ref_reloc_sym *ref; |
886 | ||
887 | ref = zalloc(sizeof(struct ref_reloc_sym)); | |
888 | if (ref == NULL) | |
889 | return -ENOMEM; | |
56b03f3c | 890 | |
a1645ce1 ZY |
891 | ref->name = strdup(symbol_name); |
892 | if (ref->name == NULL) { | |
893 | free(ref); | |
56b03f3c | 894 | return -ENOMEM; |
a1645ce1 | 895 | } |
56b03f3c | 896 | |
a1645ce1 | 897 | bracket = strchr(ref->name, ']'); |
56b03f3c ACM |
898 | if (bracket) |
899 | *bracket = '\0'; | |
900 | ||
a1645ce1 | 901 | ref->addr = addr; |
9de89fe7 ACM |
902 | |
903 | for (i = 0; i < MAP__NR_TYPES; ++i) { | |
a1645ce1 ZY |
904 | struct kmap *kmap = map__kmap(maps[i]); |
905 | kmap->ref_reloc_sym = ref; | |
9de89fe7 ACM |
906 | } |
907 | ||
56b03f3c ACM |
908 | return 0; |
909 | } | |
1f626bc3 ACM |
910 | |
911 | size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) | |
912 | { | |
913 | return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) + | |
914 | __dsos__fprintf(&self->host_machine.user_dsos, fp) + | |
915 | machines__fprintf_dsos(&self->machines, fp); | |
916 | } | |
f869097e ACM |
917 | |
918 | size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp, | |
919 | bool with_hits) | |
920 | { | |
921 | size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits); | |
922 | return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits); | |
923 | } |