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> | |
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 | ||
076c6e45 ACM |
82 | static void perf_session__destroy_kernel_maps(struct perf_session *self) |
83 | { | |
84 | machine__destroy_kernel_maps(&self->host_machine); | |
85 | machines__destroy_guest_kernel_maps(&self->machines); | |
86 | } | |
87 | ||
454c407e | 88 | struct perf_session *perf_session__new(const char *filename, int mode, bool force, bool repipe) |
94c744b6 | 89 | { |
b3165f41 | 90 | size_t len = filename ? strlen(filename) + 1 : 0; |
94c744b6 ACM |
91 | struct perf_session *self = zalloc(sizeof(*self) + len); |
92 | ||
93 | if (self == NULL) | |
94 | goto out; | |
95 | ||
96 | if (perf_header__init(&self->header) < 0) | |
4aa65636 | 97 | goto out_free; |
94c744b6 ACM |
98 | |
99 | memcpy(self->filename, filename, len); | |
b3165f41 | 100 | self->threads = RB_ROOT; |
720a3aeb | 101 | INIT_LIST_HEAD(&self->dead_threads); |
1c02c4d2 | 102 | self->hists_tree = RB_ROOT; |
b3165f41 | 103 | self->last_match = NULL; |
ec913369 | 104 | self->mmap_window = 32; |
23346f21 | 105 | self->machines = RB_ROOT; |
454c407e | 106 | self->repipe = repipe; |
c61e52ee | 107 | INIT_LIST_HEAD(&self->ordered_samples.samples_head); |
1f626bc3 | 108 | machine__init(&self->host_machine, "", HOST_KERNEL_ID); |
94c744b6 | 109 | |
64abebf7 ACM |
110 | if (mode == O_RDONLY) { |
111 | if (perf_session__open(self, force) < 0) | |
112 | goto out_delete; | |
113 | } else if (mode == O_WRONLY) { | |
114 | /* | |
115 | * In O_RDONLY mode this will be performed when reading the | |
116 | * kernel MMAP event, in event__process_mmap(). | |
117 | */ | |
118 | if (perf_session__create_kernel_maps(self) < 0) | |
119 | goto out_delete; | |
120 | } | |
d549c769 | 121 | |
8dc58101 | 122 | perf_session__update_sample_type(self); |
94c744b6 ACM |
123 | out: |
124 | return self; | |
4aa65636 | 125 | out_free: |
94c744b6 ACM |
126 | free(self); |
127 | return NULL; | |
4aa65636 ACM |
128 | out_delete: |
129 | perf_session__delete(self); | |
130 | return NULL; | |
94c744b6 ACM |
131 | } |
132 | ||
d65a458b ACM |
133 | static void perf_session__delete_dead_threads(struct perf_session *self) |
134 | { | |
135 | struct thread *n, *t; | |
136 | ||
137 | list_for_each_entry_safe(t, n, &self->dead_threads, node) { | |
138 | list_del(&t->node); | |
139 | thread__delete(t); | |
140 | } | |
141 | } | |
142 | ||
143 | static void perf_session__delete_threads(struct perf_session *self) | |
144 | { | |
145 | struct rb_node *nd = rb_first(&self->threads); | |
146 | ||
147 | while (nd) { | |
148 | struct thread *t = rb_entry(nd, struct thread, rb_node); | |
149 | ||
150 | rb_erase(&t->rb_node, &self->threads); | |
151 | nd = rb_next(nd); | |
152 | thread__delete(t); | |
153 | } | |
154 | } | |
155 | ||
94c744b6 ACM |
156 | void perf_session__delete(struct perf_session *self) |
157 | { | |
158 | perf_header__exit(&self->header); | |
076c6e45 | 159 | perf_session__destroy_kernel_maps(self); |
d65a458b ACM |
160 | perf_session__delete_dead_threads(self); |
161 | perf_session__delete_threads(self); | |
162 | machine__exit(&self->host_machine); | |
94c744b6 ACM |
163 | close(self->fd); |
164 | free(self); | |
165 | } | |
a328626b | 166 | |
720a3aeb ACM |
167 | void perf_session__remove_thread(struct perf_session *self, struct thread *th) |
168 | { | |
70597f21 | 169 | self->last_match = NULL; |
720a3aeb ACM |
170 | rb_erase(&th->rb_node, &self->threads); |
171 | /* | |
172 | * We may have references to this thread, for instance in some hist_entry | |
173 | * instances, so just move them to a separate list. | |
174 | */ | |
175 | list_add_tail(&th->node, &self->dead_threads); | |
176 | } | |
177 | ||
a328626b ACM |
178 | static bool symbol__match_parent_regex(struct symbol *sym) |
179 | { | |
180 | if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0)) | |
181 | return 1; | |
182 | ||
183 | return 0; | |
184 | } | |
185 | ||
b3c9ac08 ACM |
186 | struct map_symbol *perf_session__resolve_callchain(struct perf_session *self, |
187 | struct thread *thread, | |
188 | struct ip_callchain *chain, | |
189 | struct symbol **parent) | |
a328626b ACM |
190 | { |
191 | u8 cpumode = PERF_RECORD_MISC_USER; | |
a328626b | 192 | unsigned int i; |
ad5b217b | 193 | struct map_symbol *syms = calloc(chain->nr, sizeof(*syms)); |
a328626b | 194 | |
ad5b217b ACM |
195 | if (!syms) |
196 | return NULL; | |
a328626b ACM |
197 | |
198 | for (i = 0; i < chain->nr; i++) { | |
199 | u64 ip = chain->ips[i]; | |
200 | struct addr_location al; | |
201 | ||
202 | if (ip >= PERF_CONTEXT_MAX) { | |
203 | switch (ip) { | |
204 | case PERF_CONTEXT_HV: | |
205 | cpumode = PERF_RECORD_MISC_HYPERVISOR; break; | |
206 | case PERF_CONTEXT_KERNEL: | |
207 | cpumode = PERF_RECORD_MISC_KERNEL; break; | |
208 | case PERF_CONTEXT_USER: | |
209 | cpumode = PERF_RECORD_MISC_USER; break; | |
210 | default: | |
211 | break; | |
212 | } | |
213 | continue; | |
214 | } | |
215 | ||
a1645ce1 | 216 | al.filtered = false; |
a328626b | 217 | thread__find_addr_location(thread, self, cpumode, |
a1645ce1 | 218 | MAP__FUNCTION, thread->pid, ip, &al, NULL); |
a328626b ACM |
219 | if (al.sym != NULL) { |
220 | if (sort__has_parent && !*parent && | |
221 | symbol__match_parent_regex(al.sym)) | |
222 | *parent = al.sym; | |
d599db3f | 223 | if (!symbol_conf.use_callchain) |
a328626b | 224 | break; |
b3c9ac08 ACM |
225 | syms[i].map = al.map; |
226 | syms[i].sym = al.sym; | |
a328626b ACM |
227 | } |
228 | } | |
229 | ||
230 | return syms; | |
231 | } | |
06aae590 ACM |
232 | |
233 | static int process_event_stub(event_t *event __used, | |
234 | struct perf_session *session __used) | |
235 | { | |
236 | dump_printf(": unhandled!\n"); | |
237 | return 0; | |
238 | } | |
239 | ||
d6b17beb FW |
240 | static int process_finished_round_stub(event_t *event __used, |
241 | struct perf_session *session __used, | |
242 | struct perf_event_ops *ops __used) | |
243 | { | |
244 | dump_printf(": unhandled!\n"); | |
245 | return 0; | |
246 | } | |
247 | ||
248 | static int process_finished_round(event_t *event, | |
249 | struct perf_session *session, | |
250 | struct perf_event_ops *ops); | |
251 | ||
06aae590 ACM |
252 | static void perf_event_ops__fill_defaults(struct perf_event_ops *handler) |
253 | { | |
55aa640f ACM |
254 | if (handler->sample == NULL) |
255 | handler->sample = process_event_stub; | |
256 | if (handler->mmap == NULL) | |
257 | handler->mmap = process_event_stub; | |
258 | if (handler->comm == NULL) | |
259 | handler->comm = process_event_stub; | |
260 | if (handler->fork == NULL) | |
261 | handler->fork = process_event_stub; | |
262 | if (handler->exit == NULL) | |
263 | handler->exit = process_event_stub; | |
264 | if (handler->lost == NULL) | |
265 | handler->lost = process_event_stub; | |
266 | if (handler->read == NULL) | |
267 | handler->read = process_event_stub; | |
268 | if (handler->throttle == NULL) | |
269 | handler->throttle = process_event_stub; | |
270 | if (handler->unthrottle == NULL) | |
271 | handler->unthrottle = process_event_stub; | |
2c46dbb5 TZ |
272 | if (handler->attr == NULL) |
273 | handler->attr = process_event_stub; | |
cd19a035 TZ |
274 | if (handler->event_type == NULL) |
275 | handler->event_type = process_event_stub; | |
9215545e TZ |
276 | if (handler->tracing_data == NULL) |
277 | handler->tracing_data = process_event_stub; | |
c7929e47 TZ |
278 | if (handler->build_id == NULL) |
279 | handler->build_id = process_event_stub; | |
d6b17beb FW |
280 | if (handler->finished_round == NULL) { |
281 | if (handler->ordered_samples) | |
282 | handler->finished_round = process_finished_round; | |
283 | else | |
284 | handler->finished_round = process_finished_round_stub; | |
285 | } | |
06aae590 ACM |
286 | } |
287 | ||
ba21594c ACM |
288 | void mem_bswap_64(void *src, int byte_size) |
289 | { | |
290 | u64 *m = src; | |
291 | ||
292 | while (byte_size > 0) { | |
293 | *m = bswap_64(*m); | |
294 | byte_size -= sizeof(u64); | |
295 | ++m; | |
296 | } | |
297 | } | |
298 | ||
299 | static void event__all64_swap(event_t *self) | |
300 | { | |
301 | struct perf_event_header *hdr = &self->header; | |
302 | mem_bswap_64(hdr + 1, self->header.size - sizeof(*hdr)); | |
303 | } | |
304 | ||
305 | static void event__comm_swap(event_t *self) | |
306 | { | |
307 | self->comm.pid = bswap_32(self->comm.pid); | |
308 | self->comm.tid = bswap_32(self->comm.tid); | |
309 | } | |
310 | ||
311 | static void event__mmap_swap(event_t *self) | |
312 | { | |
313 | self->mmap.pid = bswap_32(self->mmap.pid); | |
314 | self->mmap.tid = bswap_32(self->mmap.tid); | |
315 | self->mmap.start = bswap_64(self->mmap.start); | |
316 | self->mmap.len = bswap_64(self->mmap.len); | |
317 | self->mmap.pgoff = bswap_64(self->mmap.pgoff); | |
318 | } | |
319 | ||
320 | static void event__task_swap(event_t *self) | |
321 | { | |
322 | self->fork.pid = bswap_32(self->fork.pid); | |
323 | self->fork.tid = bswap_32(self->fork.tid); | |
324 | self->fork.ppid = bswap_32(self->fork.ppid); | |
325 | self->fork.ptid = bswap_32(self->fork.ptid); | |
326 | self->fork.time = bswap_64(self->fork.time); | |
327 | } | |
328 | ||
329 | static void event__read_swap(event_t *self) | |
330 | { | |
331 | self->read.pid = bswap_32(self->read.pid); | |
332 | self->read.tid = bswap_32(self->read.tid); | |
333 | self->read.value = bswap_64(self->read.value); | |
334 | self->read.time_enabled = bswap_64(self->read.time_enabled); | |
335 | self->read.time_running = bswap_64(self->read.time_running); | |
336 | self->read.id = bswap_64(self->read.id); | |
337 | } | |
338 | ||
2c46dbb5 TZ |
339 | static void event__attr_swap(event_t *self) |
340 | { | |
341 | size_t size; | |
342 | ||
343 | self->attr.attr.type = bswap_32(self->attr.attr.type); | |
344 | self->attr.attr.size = bswap_32(self->attr.attr.size); | |
345 | self->attr.attr.config = bswap_64(self->attr.attr.config); | |
346 | self->attr.attr.sample_period = bswap_64(self->attr.attr.sample_period); | |
347 | self->attr.attr.sample_type = bswap_64(self->attr.attr.sample_type); | |
348 | self->attr.attr.read_format = bswap_64(self->attr.attr.read_format); | |
349 | self->attr.attr.wakeup_events = bswap_32(self->attr.attr.wakeup_events); | |
350 | self->attr.attr.bp_type = bswap_32(self->attr.attr.bp_type); | |
351 | self->attr.attr.bp_addr = bswap_64(self->attr.attr.bp_addr); | |
352 | self->attr.attr.bp_len = bswap_64(self->attr.attr.bp_len); | |
353 | ||
354 | size = self->header.size; | |
355 | size -= (void *)&self->attr.id - (void *)self; | |
356 | mem_bswap_64(self->attr.id, size); | |
357 | } | |
358 | ||
cd19a035 TZ |
359 | static void event__event_type_swap(event_t *self) |
360 | { | |
361 | self->event_type.event_type.event_id = | |
362 | bswap_64(self->event_type.event_type.event_id); | |
363 | } | |
364 | ||
9215545e TZ |
365 | static void event__tracing_data_swap(event_t *self) |
366 | { | |
367 | self->tracing_data.size = bswap_32(self->tracing_data.size); | |
368 | } | |
369 | ||
ba21594c ACM |
370 | typedef void (*event__swap_op)(event_t *self); |
371 | ||
372 | static event__swap_op event__swap_ops[] = { | |
373 | [PERF_RECORD_MMAP] = event__mmap_swap, | |
374 | [PERF_RECORD_COMM] = event__comm_swap, | |
375 | [PERF_RECORD_FORK] = event__task_swap, | |
376 | [PERF_RECORD_EXIT] = event__task_swap, | |
377 | [PERF_RECORD_LOST] = event__all64_swap, | |
378 | [PERF_RECORD_READ] = event__read_swap, | |
379 | [PERF_RECORD_SAMPLE] = event__all64_swap, | |
2c46dbb5 | 380 | [PERF_RECORD_HEADER_ATTR] = event__attr_swap, |
cd19a035 | 381 | [PERF_RECORD_HEADER_EVENT_TYPE] = event__event_type_swap, |
9215545e | 382 | [PERF_RECORD_HEADER_TRACING_DATA] = event__tracing_data_swap, |
c7929e47 | 383 | [PERF_RECORD_HEADER_BUILD_ID] = NULL, |
8dc58101 | 384 | [PERF_RECORD_HEADER_MAX] = NULL, |
ba21594c ACM |
385 | }; |
386 | ||
c61e52ee FW |
387 | struct sample_queue { |
388 | u64 timestamp; | |
389 | struct sample_event *event; | |
390 | struct list_head list; | |
391 | }; | |
392 | ||
c61e52ee FW |
393 | static void flush_sample_queue(struct perf_session *s, |
394 | struct perf_event_ops *ops) | |
395 | { | |
396 | struct list_head *head = &s->ordered_samples.samples_head; | |
d6b17beb | 397 | u64 limit = s->ordered_samples.next_flush; |
c61e52ee FW |
398 | struct sample_queue *tmp, *iter; |
399 | ||
d6b17beb | 400 | if (!ops->ordered_samples || !limit) |
c61e52ee FW |
401 | return; |
402 | ||
403 | list_for_each_entry_safe(iter, tmp, head, list) { | |
404 | if (iter->timestamp > limit) | |
405 | return; | |
406 | ||
407 | if (iter == s->ordered_samples.last_inserted) | |
408 | s->ordered_samples.last_inserted = NULL; | |
409 | ||
410 | ops->sample((event_t *)iter->event, s); | |
411 | ||
412 | s->ordered_samples.last_flush = iter->timestamp; | |
413 | list_del(&iter->list); | |
414 | free(iter->event); | |
415 | free(iter); | |
416 | } | |
417 | } | |
418 | ||
d6b17beb FW |
419 | /* |
420 | * When perf record finishes a pass on every buffers, it records this pseudo | |
421 | * event. | |
422 | * We record the max timestamp t found in the pass n. | |
423 | * Assuming these timestamps are monotonic across cpus, we know that if | |
424 | * a buffer still has events with timestamps below t, they will be all | |
425 | * available and then read in the pass n + 1. | |
426 | * Hence when we start to read the pass n + 2, we can safely flush every | |
427 | * events with timestamps below t. | |
428 | * | |
429 | * ============ PASS n ================= | |
430 | * CPU 0 | CPU 1 | |
431 | * | | |
432 | * cnt1 timestamps | cnt2 timestamps | |
433 | * 1 | 2 | |
434 | * 2 | 3 | |
435 | * - | 4 <--- max recorded | |
436 | * | |
437 | * ============ PASS n + 1 ============== | |
438 | * CPU 0 | CPU 1 | |
439 | * | | |
440 | * cnt1 timestamps | cnt2 timestamps | |
441 | * 3 | 5 | |
442 | * 4 | 6 | |
443 | * 5 | 7 <---- max recorded | |
444 | * | |
445 | * Flush every events below timestamp 4 | |
446 | * | |
447 | * ============ PASS n + 2 ============== | |
448 | * CPU 0 | CPU 1 | |
449 | * | | |
450 | * cnt1 timestamps | cnt2 timestamps | |
451 | * 6 | 8 | |
452 | * 7 | 9 | |
453 | * - | 10 | |
454 | * | |
455 | * Flush every events below timestamp 7 | |
456 | * etc... | |
457 | */ | |
458 | static int process_finished_round(event_t *event __used, | |
459 | struct perf_session *session, | |
460 | struct perf_event_ops *ops) | |
461 | { | |
462 | flush_sample_queue(session, ops); | |
463 | session->ordered_samples.next_flush = session->ordered_samples.max_timestamp; | |
464 | ||
465 | return 0; | |
466 | } | |
467 | ||
c61e52ee FW |
468 | static void __queue_sample_end(struct sample_queue *new, struct list_head *head) |
469 | { | |
470 | struct sample_queue *iter; | |
471 | ||
472 | list_for_each_entry_reverse(iter, head, list) { | |
473 | if (iter->timestamp < new->timestamp) { | |
474 | list_add(&new->list, &iter->list); | |
475 | return; | |
476 | } | |
477 | } | |
478 | ||
479 | list_add(&new->list, head); | |
480 | } | |
481 | ||
482 | static void __queue_sample_before(struct sample_queue *new, | |
483 | struct sample_queue *iter, | |
484 | struct list_head *head) | |
485 | { | |
486 | list_for_each_entry_continue_reverse(iter, head, list) { | |
487 | if (iter->timestamp < new->timestamp) { | |
488 | list_add(&new->list, &iter->list); | |
489 | return; | |
490 | } | |
491 | } | |
492 | ||
493 | list_add(&new->list, head); | |
494 | } | |
495 | ||
496 | static void __queue_sample_after(struct sample_queue *new, | |
497 | struct sample_queue *iter, | |
498 | struct list_head *head) | |
499 | { | |
500 | list_for_each_entry_continue(iter, head, list) { | |
501 | if (iter->timestamp > new->timestamp) { | |
502 | list_add_tail(&new->list, &iter->list); | |
503 | return; | |
504 | } | |
505 | } | |
506 | list_add_tail(&new->list, head); | |
507 | } | |
508 | ||
509 | /* The queue is ordered by time */ | |
510 | static void __queue_sample_event(struct sample_queue *new, | |
511 | struct perf_session *s) | |
512 | { | |
513 | struct sample_queue *last_inserted = s->ordered_samples.last_inserted; | |
514 | struct list_head *head = &s->ordered_samples.samples_head; | |
515 | ||
516 | ||
517 | if (!last_inserted) { | |
518 | __queue_sample_end(new, head); | |
519 | return; | |
520 | } | |
521 | ||
522 | /* | |
523 | * Most of the time the current event has a timestamp | |
524 | * very close to the last event inserted, unless we just switched | |
525 | * to another event buffer. Having a sorting based on a list and | |
526 | * on the last inserted event that is close to the current one is | |
527 | * probably more efficient than an rbtree based sorting. | |
528 | */ | |
529 | if (last_inserted->timestamp >= new->timestamp) | |
530 | __queue_sample_before(new, last_inserted, head); | |
531 | else | |
532 | __queue_sample_after(new, last_inserted, head); | |
533 | } | |
534 | ||
535 | static int queue_sample_event(event_t *event, struct sample_data *data, | |
d6b17beb | 536 | struct perf_session *s) |
c61e52ee FW |
537 | { |
538 | u64 timestamp = data->time; | |
539 | struct sample_queue *new; | |
c61e52ee FW |
540 | |
541 | ||
c61e52ee FW |
542 | if (timestamp < s->ordered_samples.last_flush) { |
543 | printf("Warning: Timestamp below last timeslice flush\n"); | |
544 | return -EINVAL; | |
545 | } | |
546 | ||
547 | new = malloc(sizeof(*new)); | |
548 | if (!new) | |
549 | return -ENOMEM; | |
550 | ||
551 | new->timestamp = timestamp; | |
552 | ||
553 | new->event = malloc(event->header.size); | |
554 | if (!new->event) { | |
555 | free(new); | |
556 | return -ENOMEM; | |
557 | } | |
558 | ||
559 | memcpy(new->event, event, event->header.size); | |
560 | ||
561 | __queue_sample_event(new, s); | |
562 | s->ordered_samples.last_inserted = new; | |
563 | ||
d6b17beb FW |
564 | if (new->timestamp > s->ordered_samples.max_timestamp) |
565 | s->ordered_samples.max_timestamp = new->timestamp; | |
c61e52ee FW |
566 | |
567 | return 0; | |
568 | } | |
569 | ||
570 | static int perf_session__process_sample(event_t *event, struct perf_session *s, | |
571 | struct perf_event_ops *ops) | |
572 | { | |
573 | struct sample_data data; | |
574 | ||
575 | if (!ops->ordered_samples) | |
576 | return ops->sample(event, s); | |
577 | ||
578 | bzero(&data, sizeof(struct sample_data)); | |
579 | event__parse_sample(event, s->sample_type, &data); | |
580 | ||
d6b17beb | 581 | queue_sample_event(event, &data, s); |
c61e52ee FW |
582 | |
583 | return 0; | |
584 | } | |
585 | ||
06aae590 ACM |
586 | static int perf_session__process_event(struct perf_session *self, |
587 | event_t *event, | |
588 | struct perf_event_ops *ops, | |
ba21594c | 589 | u64 offset, u64 head) |
06aae590 ACM |
590 | { |
591 | trace_event(event); | |
592 | ||
8dc58101 | 593 | if (event->header.type < PERF_RECORD_HEADER_MAX) { |
ba21594c | 594 | dump_printf("%#Lx [%#x]: PERF_RECORD_%s", |
0d755034 | 595 | offset + head, event->header.size, |
06aae590 | 596 | event__name[event->header.type]); |
cee75ac7 | 597 | hists__inc_nr_events(&self->hists, event->header.type); |
06aae590 ACM |
598 | } |
599 | ||
ba21594c ACM |
600 | if (self->header.needs_swap && event__swap_ops[event->header.type]) |
601 | event__swap_ops[event->header.type](event); | |
602 | ||
06aae590 ACM |
603 | switch (event->header.type) { |
604 | case PERF_RECORD_SAMPLE: | |
c61e52ee | 605 | return perf_session__process_sample(event, self, ops); |
06aae590 | 606 | case PERF_RECORD_MMAP: |
55aa640f | 607 | return ops->mmap(event, self); |
06aae590 | 608 | case PERF_RECORD_COMM: |
55aa640f | 609 | return ops->comm(event, self); |
06aae590 | 610 | case PERF_RECORD_FORK: |
55aa640f | 611 | return ops->fork(event, self); |
06aae590 | 612 | case PERF_RECORD_EXIT: |
55aa640f | 613 | return ops->exit(event, self); |
06aae590 | 614 | case PERF_RECORD_LOST: |
55aa640f | 615 | return ops->lost(event, self); |
06aae590 | 616 | case PERF_RECORD_READ: |
55aa640f | 617 | return ops->read(event, self); |
06aae590 | 618 | case PERF_RECORD_THROTTLE: |
55aa640f | 619 | return ops->throttle(event, self); |
06aae590 | 620 | case PERF_RECORD_UNTHROTTLE: |
55aa640f | 621 | return ops->unthrottle(event, self); |
2c46dbb5 TZ |
622 | case PERF_RECORD_HEADER_ATTR: |
623 | return ops->attr(event, self); | |
cd19a035 TZ |
624 | case PERF_RECORD_HEADER_EVENT_TYPE: |
625 | return ops->event_type(event, self); | |
9215545e TZ |
626 | case PERF_RECORD_HEADER_TRACING_DATA: |
627 | /* setup for reading amidst mmap */ | |
628 | lseek(self->fd, offset + head, SEEK_SET); | |
629 | return ops->tracing_data(event, self); | |
c7929e47 TZ |
630 | case PERF_RECORD_HEADER_BUILD_ID: |
631 | return ops->build_id(event, self); | |
d6b17beb FW |
632 | case PERF_RECORD_FINISHED_ROUND: |
633 | return ops->finished_round(event, self, ops); | |
06aae590 | 634 | default: |
c8446b9b | 635 | ++self->hists.stats.nr_unknown_events; |
06aae590 ACM |
636 | return -1; |
637 | } | |
638 | } | |
639 | ||
ba21594c ACM |
640 | void perf_event_header__bswap(struct perf_event_header *self) |
641 | { | |
642 | self->type = bswap_32(self->type); | |
643 | self->misc = bswap_16(self->misc); | |
644 | self->size = bswap_16(self->size); | |
645 | } | |
646 | ||
06aae590 ACM |
647 | static struct thread *perf_session__register_idle_thread(struct perf_session *self) |
648 | { | |
649 | struct thread *thread = perf_session__findnew(self, 0); | |
650 | ||
651 | if (thread == NULL || thread__set_comm(thread, "swapper")) { | |
652 | pr_err("problem inserting idle task.\n"); | |
653 | thread = NULL; | |
654 | } | |
655 | ||
656 | return thread; | |
657 | } | |
658 | ||
8dc58101 TZ |
659 | int do_read(int fd, void *buf, size_t size) |
660 | { | |
661 | void *buf_start = buf; | |
662 | ||
663 | while (size) { | |
664 | int ret = read(fd, buf, size); | |
665 | ||
666 | if (ret <= 0) | |
667 | return ret; | |
668 | ||
669 | size -= ret; | |
670 | buf += ret; | |
671 | } | |
672 | ||
673 | return buf - buf_start; | |
674 | } | |
675 | ||
676 | #define session_done() (*(volatile int *)(&session_done)) | |
677 | volatile int session_done; | |
678 | ||
679 | static int __perf_session__process_pipe_events(struct perf_session *self, | |
680 | struct perf_event_ops *ops) | |
681 | { | |
682 | event_t event; | |
683 | uint32_t size; | |
684 | int skip = 0; | |
685 | u64 head; | |
686 | int err; | |
687 | void *p; | |
688 | ||
689 | perf_event_ops__fill_defaults(ops); | |
690 | ||
691 | head = 0; | |
692 | more: | |
693 | err = do_read(self->fd, &event, sizeof(struct perf_event_header)); | |
694 | if (err <= 0) { | |
695 | if (err == 0) | |
696 | goto done; | |
697 | ||
698 | pr_err("failed to read event header\n"); | |
699 | goto out_err; | |
700 | } | |
701 | ||
702 | if (self->header.needs_swap) | |
703 | perf_event_header__bswap(&event.header); | |
704 | ||
705 | size = event.header.size; | |
706 | if (size == 0) | |
707 | size = 8; | |
708 | ||
709 | p = &event; | |
710 | p += sizeof(struct perf_event_header); | |
711 | ||
794e43b5 TZ |
712 | if (size - sizeof(struct perf_event_header)) { |
713 | err = do_read(self->fd, p, | |
714 | size - sizeof(struct perf_event_header)); | |
715 | if (err <= 0) { | |
716 | if (err == 0) { | |
717 | pr_err("unexpected end of event stream\n"); | |
718 | goto done; | |
719 | } | |
8dc58101 | 720 | |
794e43b5 TZ |
721 | pr_err("failed to read event data\n"); |
722 | goto out_err; | |
723 | } | |
8dc58101 TZ |
724 | } |
725 | ||
726 | if (size == 0 || | |
727 | (skip = perf_session__process_event(self, &event, ops, | |
728 | 0, head)) < 0) { | |
729 | dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n", | |
730 | head, event.header.size, event.header.type); | |
731 | /* | |
732 | * assume we lost track of the stream, check alignment, and | |
733 | * increment a single u64 in the hope to catch on again 'soon'. | |
734 | */ | |
735 | if (unlikely(head & 7)) | |
736 | head &= ~7ULL; | |
737 | ||
738 | size = 8; | |
739 | } | |
740 | ||
741 | head += size; | |
742 | ||
743 | dump_printf("\n%#Lx [%#x]: event: %d\n", | |
744 | head, event.header.size, event.header.type); | |
745 | ||
746 | if (skip > 0) | |
747 | head += skip; | |
748 | ||
749 | if (!session_done()) | |
750 | goto more; | |
751 | done: | |
752 | err = 0; | |
753 | out_err: | |
754 | return err; | |
755 | } | |
756 | ||
6122e4e4 ACM |
757 | int __perf_session__process_events(struct perf_session *self, |
758 | u64 data_offset, u64 data_size, | |
759 | u64 file_size, struct perf_event_ops *ops) | |
06aae590 | 760 | { |
ba21594c ACM |
761 | int err, mmap_prot, mmap_flags; |
762 | u64 head, shift; | |
763 | u64 offset = 0; | |
06aae590 ACM |
764 | size_t page_size; |
765 | event_t *event; | |
766 | uint32_t size; | |
767 | char *buf; | |
5f4d3f88 ACM |
768 | struct ui_progress *progress = ui_progress__new("Processing events...", |
769 | self->size); | |
770 | if (progress == NULL) | |
771 | return -1; | |
06aae590 | 772 | |
06aae590 ACM |
773 | perf_event_ops__fill_defaults(ops); |
774 | ||
1b75962e | 775 | page_size = sysconf(_SC_PAGESIZE); |
06aae590 | 776 | |
6122e4e4 | 777 | head = data_offset; |
06aae590 ACM |
778 | shift = page_size * (head / page_size); |
779 | offset += shift; | |
780 | head -= shift; | |
781 | ||
ba21594c ACM |
782 | mmap_prot = PROT_READ; |
783 | mmap_flags = MAP_SHARED; | |
784 | ||
785 | if (self->header.needs_swap) { | |
786 | mmap_prot |= PROT_WRITE; | |
787 | mmap_flags = MAP_PRIVATE; | |
788 | } | |
06aae590 | 789 | remap: |
ba21594c ACM |
790 | buf = mmap(NULL, page_size * self->mmap_window, mmap_prot, |
791 | mmap_flags, self->fd, offset); | |
06aae590 ACM |
792 | if (buf == MAP_FAILED) { |
793 | pr_err("failed to mmap file\n"); | |
794 | err = -errno; | |
795 | goto out_err; | |
796 | } | |
797 | ||
798 | more: | |
799 | event = (event_t *)(buf + head); | |
5f4d3f88 | 800 | ui_progress__update(progress, offset); |
06aae590 | 801 | |
ba21594c ACM |
802 | if (self->header.needs_swap) |
803 | perf_event_header__bswap(&event->header); | |
06aae590 ACM |
804 | size = event->header.size; |
805 | if (size == 0) | |
806 | size = 8; | |
807 | ||
808 | if (head + event->header.size >= page_size * self->mmap_window) { | |
809 | int munmap_ret; | |
810 | ||
811 | shift = page_size * (head / page_size); | |
812 | ||
813 | munmap_ret = munmap(buf, page_size * self->mmap_window); | |
814 | assert(munmap_ret == 0); | |
815 | ||
816 | offset += shift; | |
817 | head -= shift; | |
818 | goto remap; | |
819 | } | |
820 | ||
821 | size = event->header.size; | |
822 | ||
ba21594c | 823 | dump_printf("\n%#Lx [%#x]: event: %d\n", |
0d755034 | 824 | offset + head, event->header.size, event->header.type); |
06aae590 ACM |
825 | |
826 | if (size == 0 || | |
827 | perf_session__process_event(self, event, ops, offset, head) < 0) { | |
ba21594c | 828 | dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n", |
0d755034 | 829 | offset + head, event->header.size, |
06aae590 ACM |
830 | event->header.type); |
831 | /* | |
832 | * assume we lost track of the stream, check alignment, and | |
833 | * increment a single u64 in the hope to catch on again 'soon'. | |
834 | */ | |
835 | if (unlikely(head & 7)) | |
836 | head &= ~7ULL; | |
837 | ||
838 | size = 8; | |
839 | } | |
840 | ||
841 | head += size; | |
842 | ||
6122e4e4 | 843 | if (offset + head >= data_offset + data_size) |
06aae590 ACM |
844 | goto done; |
845 | ||
6122e4e4 | 846 | if (offset + head < file_size) |
06aae590 ACM |
847 | goto more; |
848 | done: | |
849 | err = 0; | |
c61e52ee | 850 | /* do the final flush for ordered samples */ |
d6b17beb | 851 | self->ordered_samples.next_flush = ULLONG_MAX; |
c61e52ee | 852 | flush_sample_queue(self, ops); |
06aae590 | 853 | out_err: |
5f4d3f88 | 854 | ui_progress__delete(progress); |
06aae590 ACM |
855 | return err; |
856 | } | |
27295592 | 857 | |
6122e4e4 ACM |
858 | int perf_session__process_events(struct perf_session *self, |
859 | struct perf_event_ops *ops) | |
860 | { | |
861 | int err; | |
862 | ||
863 | if (perf_session__register_idle_thread(self) == NULL) | |
864 | return -ENOMEM; | |
865 | ||
8dc58101 TZ |
866 | if (!self->fd_pipe) |
867 | err = __perf_session__process_events(self, | |
868 | self->header.data_offset, | |
869 | self->header.data_size, | |
870 | self->size, ops); | |
871 | else | |
872 | err = __perf_session__process_pipe_events(self, ops); | |
88ca895d | 873 | |
6122e4e4 ACM |
874 | return err; |
875 | } | |
876 | ||
d549c769 | 877 | bool perf_session__has_traces(struct perf_session *self, const char *msg) |
27295592 ACM |
878 | { |
879 | if (!(self->sample_type & PERF_SAMPLE_RAW)) { | |
d549c769 ACM |
880 | pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); |
881 | return false; | |
27295592 ACM |
882 | } |
883 | ||
d549c769 | 884 | return true; |
27295592 | 885 | } |
56b03f3c | 886 | |
a1645ce1 | 887 | int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps, |
56b03f3c ACM |
888 | const char *symbol_name, |
889 | u64 addr) | |
890 | { | |
891 | char *bracket; | |
9de89fe7 | 892 | enum map_type i; |
a1645ce1 ZY |
893 | struct ref_reloc_sym *ref; |
894 | ||
895 | ref = zalloc(sizeof(struct ref_reloc_sym)); | |
896 | if (ref == NULL) | |
897 | return -ENOMEM; | |
56b03f3c | 898 | |
a1645ce1 ZY |
899 | ref->name = strdup(symbol_name); |
900 | if (ref->name == NULL) { | |
901 | free(ref); | |
56b03f3c | 902 | return -ENOMEM; |
a1645ce1 | 903 | } |
56b03f3c | 904 | |
a1645ce1 | 905 | bracket = strchr(ref->name, ']'); |
56b03f3c ACM |
906 | if (bracket) |
907 | *bracket = '\0'; | |
908 | ||
a1645ce1 | 909 | ref->addr = addr; |
9de89fe7 ACM |
910 | |
911 | for (i = 0; i < MAP__NR_TYPES; ++i) { | |
a1645ce1 ZY |
912 | struct kmap *kmap = map__kmap(maps[i]); |
913 | kmap->ref_reloc_sym = ref; | |
9de89fe7 ACM |
914 | } |
915 | ||
56b03f3c ACM |
916 | return 0; |
917 | } | |
1f626bc3 ACM |
918 | |
919 | size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) | |
920 | { | |
921 | return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) + | |
922 | __dsos__fprintf(&self->host_machine.user_dsos, fp) + | |
923 | machines__fprintf_dsos(&self->machines, fp); | |
924 | } | |
f869097e ACM |
925 | |
926 | size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp, | |
927 | bool with_hits) | |
928 | { | |
929 | size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits); | |
930 | return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits); | |
931 | } |