Commit | Line | Data |
---|---|---|
b8f46c5a XG |
1 | #define _FILE_OFFSET_BITS 64 |
2 | ||
94c744b6 ACM |
3 | #include <linux/kernel.h> |
4 | ||
ba21594c | 5 | #include <byteswap.h> |
94c744b6 ACM |
6 | #include <unistd.h> |
7 | #include <sys/types.h> | |
8 | ||
9 | #include "session.h" | |
a328626b | 10 | #include "sort.h" |
94c744b6 ACM |
11 | #include "util.h" |
12 | ||
13 | static int perf_session__open(struct perf_session *self, bool force) | |
14 | { | |
15 | struct stat input_stat; | |
16 | ||
8dc58101 TZ |
17 | if (!strcmp(self->filename, "-")) { |
18 | self->fd_pipe = true; | |
19 | self->fd = STDIN_FILENO; | |
20 | ||
21 | if (perf_header__read(self, self->fd) < 0) | |
22 | pr_err("incompatible file format"); | |
23 | ||
24 | return 0; | |
25 | } | |
26 | ||
f887f301 | 27 | self->fd = open(self->filename, O_RDONLY); |
94c744b6 ACM |
28 | if (self->fd < 0) { |
29 | pr_err("failed to open file: %s", self->filename); | |
30 | if (!strcmp(self->filename, "perf.data")) | |
31 | pr_err(" (try 'perf record' first)"); | |
32 | pr_err("\n"); | |
33 | return -errno; | |
34 | } | |
35 | ||
36 | if (fstat(self->fd, &input_stat) < 0) | |
37 | goto out_close; | |
38 | ||
39 | if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) { | |
40 | pr_err("file %s not owned by current user or root\n", | |
41 | self->filename); | |
42 | goto out_close; | |
43 | } | |
44 | ||
45 | if (!input_stat.st_size) { | |
46 | pr_info("zero-sized file (%s), nothing to do!\n", | |
47 | self->filename); | |
48 | goto out_close; | |
49 | } | |
50 | ||
8dc58101 | 51 | if (perf_header__read(self, self->fd) < 0) { |
94c744b6 ACM |
52 | pr_err("incompatible file format"); |
53 | goto out_close; | |
54 | } | |
55 | ||
56 | self->size = input_stat.st_size; | |
57 | return 0; | |
58 | ||
59 | out_close: | |
60 | close(self->fd); | |
61 | self->fd = -1; | |
62 | return -1; | |
63 | } | |
64 | ||
8dc58101 TZ |
65 | void perf_session__update_sample_type(struct perf_session *self) |
66 | { | |
67 | self->sample_type = perf_header__sample_type(&self->header); | |
68 | } | |
69 | ||
a1645ce1 ZY |
70 | int perf_session__create_kernel_maps(struct perf_session *self) |
71 | { | |
d118f8ba | 72 | int ret = machine__create_kernel_maps(&self->host_machine); |
a1645ce1 | 73 | |
a1645ce1 | 74 | if (ret >= 0) |
d118f8ba | 75 | ret = machines__create_guest_kernel_maps(&self->machines); |
a1645ce1 ZY |
76 | return ret; |
77 | } | |
78 | ||
454c407e | 79 | struct perf_session *perf_session__new(const char *filename, int mode, bool force, bool repipe) |
94c744b6 | 80 | { |
b3165f41 | 81 | size_t len = filename ? strlen(filename) + 1 : 0; |
94c744b6 ACM |
82 | struct perf_session *self = zalloc(sizeof(*self) + len); |
83 | ||
84 | if (self == NULL) | |
85 | goto out; | |
86 | ||
87 | if (perf_header__init(&self->header) < 0) | |
4aa65636 | 88 | goto out_free; |
94c744b6 ACM |
89 | |
90 | memcpy(self->filename, filename, len); | |
b3165f41 | 91 | self->threads = RB_ROOT; |
1c02c4d2 | 92 | self->hists_tree = RB_ROOT; |
b3165f41 | 93 | self->last_match = NULL; |
ec913369 ACM |
94 | self->mmap_window = 32; |
95 | self->cwd = NULL; | |
96 | self->cwdlen = 0; | |
23346f21 | 97 | self->machines = RB_ROOT; |
454c407e | 98 | self->repipe = repipe; |
c61e52ee | 99 | INIT_LIST_HEAD(&self->ordered_samples.samples_head); |
1f626bc3 | 100 | machine__init(&self->host_machine, "", HOST_KERNEL_ID); |
94c744b6 | 101 | |
64abebf7 ACM |
102 | if (mode == O_RDONLY) { |
103 | if (perf_session__open(self, force) < 0) | |
104 | goto out_delete; | |
105 | } else if (mode == O_WRONLY) { | |
106 | /* | |
107 | * In O_RDONLY mode this will be performed when reading the | |
108 | * kernel MMAP event, in event__process_mmap(). | |
109 | */ | |
110 | if (perf_session__create_kernel_maps(self) < 0) | |
111 | goto out_delete; | |
112 | } | |
d549c769 | 113 | |
8dc58101 | 114 | perf_session__update_sample_type(self); |
94c744b6 ACM |
115 | out: |
116 | return self; | |
4aa65636 | 117 | out_free: |
94c744b6 ACM |
118 | free(self); |
119 | return NULL; | |
4aa65636 ACM |
120 | out_delete: |
121 | perf_session__delete(self); | |
122 | return NULL; | |
94c744b6 ACM |
123 | } |
124 | ||
125 | void perf_session__delete(struct perf_session *self) | |
126 | { | |
127 | perf_header__exit(&self->header); | |
128 | close(self->fd); | |
ec913369 | 129 | free(self->cwd); |
94c744b6 ACM |
130 | free(self); |
131 | } | |
a328626b ACM |
132 | |
133 | static bool symbol__match_parent_regex(struct symbol *sym) | |
134 | { | |
135 | if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0)) | |
136 | return 1; | |
137 | ||
138 | return 0; | |
139 | } | |
140 | ||
b3c9ac08 ACM |
141 | struct map_symbol *perf_session__resolve_callchain(struct perf_session *self, |
142 | struct thread *thread, | |
143 | struct ip_callchain *chain, | |
144 | struct symbol **parent) | |
a328626b ACM |
145 | { |
146 | u8 cpumode = PERF_RECORD_MISC_USER; | |
a328626b | 147 | unsigned int i; |
ad5b217b | 148 | struct map_symbol *syms = calloc(chain->nr, sizeof(*syms)); |
a328626b | 149 | |
ad5b217b ACM |
150 | if (!syms) |
151 | return NULL; | |
a328626b ACM |
152 | |
153 | for (i = 0; i < chain->nr; i++) { | |
154 | u64 ip = chain->ips[i]; | |
155 | struct addr_location al; | |
156 | ||
157 | if (ip >= PERF_CONTEXT_MAX) { | |
158 | switch (ip) { | |
159 | case PERF_CONTEXT_HV: | |
160 | cpumode = PERF_RECORD_MISC_HYPERVISOR; break; | |
161 | case PERF_CONTEXT_KERNEL: | |
162 | cpumode = PERF_RECORD_MISC_KERNEL; break; | |
163 | case PERF_CONTEXT_USER: | |
164 | cpumode = PERF_RECORD_MISC_USER; break; | |
165 | default: | |
166 | break; | |
167 | } | |
168 | continue; | |
169 | } | |
170 | ||
a1645ce1 | 171 | al.filtered = false; |
a328626b | 172 | thread__find_addr_location(thread, self, cpumode, |
a1645ce1 | 173 | MAP__FUNCTION, thread->pid, ip, &al, NULL); |
a328626b ACM |
174 | if (al.sym != NULL) { |
175 | if (sort__has_parent && !*parent && | |
176 | symbol__match_parent_regex(al.sym)) | |
177 | *parent = al.sym; | |
d599db3f | 178 | if (!symbol_conf.use_callchain) |
a328626b | 179 | break; |
b3c9ac08 ACM |
180 | syms[i].map = al.map; |
181 | syms[i].sym = al.sym; | |
a328626b ACM |
182 | } |
183 | } | |
184 | ||
185 | return syms; | |
186 | } | |
06aae590 ACM |
187 | |
188 | static int process_event_stub(event_t *event __used, | |
189 | struct perf_session *session __used) | |
190 | { | |
191 | dump_printf(": unhandled!\n"); | |
192 | return 0; | |
193 | } | |
194 | ||
d6b17beb FW |
195 | static int process_finished_round_stub(event_t *event __used, |
196 | struct perf_session *session __used, | |
197 | struct perf_event_ops *ops __used) | |
198 | { | |
199 | dump_printf(": unhandled!\n"); | |
200 | return 0; | |
201 | } | |
202 | ||
203 | static int process_finished_round(event_t *event, | |
204 | struct perf_session *session, | |
205 | struct perf_event_ops *ops); | |
206 | ||
06aae590 ACM |
207 | static void perf_event_ops__fill_defaults(struct perf_event_ops *handler) |
208 | { | |
55aa640f ACM |
209 | if (handler->sample == NULL) |
210 | handler->sample = process_event_stub; | |
211 | if (handler->mmap == NULL) | |
212 | handler->mmap = process_event_stub; | |
213 | if (handler->comm == NULL) | |
214 | handler->comm = process_event_stub; | |
215 | if (handler->fork == NULL) | |
216 | handler->fork = process_event_stub; | |
217 | if (handler->exit == NULL) | |
218 | handler->exit = process_event_stub; | |
219 | if (handler->lost == NULL) | |
220 | handler->lost = process_event_stub; | |
221 | if (handler->read == NULL) | |
222 | handler->read = process_event_stub; | |
223 | if (handler->throttle == NULL) | |
224 | handler->throttle = process_event_stub; | |
225 | if (handler->unthrottle == NULL) | |
226 | handler->unthrottle = process_event_stub; | |
2c46dbb5 TZ |
227 | if (handler->attr == NULL) |
228 | handler->attr = process_event_stub; | |
cd19a035 TZ |
229 | if (handler->event_type == NULL) |
230 | handler->event_type = process_event_stub; | |
9215545e TZ |
231 | if (handler->tracing_data == NULL) |
232 | handler->tracing_data = process_event_stub; | |
c7929e47 TZ |
233 | if (handler->build_id == NULL) |
234 | handler->build_id = process_event_stub; | |
d6b17beb FW |
235 | if (handler->finished_round == NULL) { |
236 | if (handler->ordered_samples) | |
237 | handler->finished_round = process_finished_round; | |
238 | else | |
239 | handler->finished_round = process_finished_round_stub; | |
240 | } | |
06aae590 ACM |
241 | } |
242 | ||
ba21594c ACM |
243 | void mem_bswap_64(void *src, int byte_size) |
244 | { | |
245 | u64 *m = src; | |
246 | ||
247 | while (byte_size > 0) { | |
248 | *m = bswap_64(*m); | |
249 | byte_size -= sizeof(u64); | |
250 | ++m; | |
251 | } | |
252 | } | |
253 | ||
254 | static void event__all64_swap(event_t *self) | |
255 | { | |
256 | struct perf_event_header *hdr = &self->header; | |
257 | mem_bswap_64(hdr + 1, self->header.size - sizeof(*hdr)); | |
258 | } | |
259 | ||
260 | static void event__comm_swap(event_t *self) | |
261 | { | |
262 | self->comm.pid = bswap_32(self->comm.pid); | |
263 | self->comm.tid = bswap_32(self->comm.tid); | |
264 | } | |
265 | ||
266 | static void event__mmap_swap(event_t *self) | |
267 | { | |
268 | self->mmap.pid = bswap_32(self->mmap.pid); | |
269 | self->mmap.tid = bswap_32(self->mmap.tid); | |
270 | self->mmap.start = bswap_64(self->mmap.start); | |
271 | self->mmap.len = bswap_64(self->mmap.len); | |
272 | self->mmap.pgoff = bswap_64(self->mmap.pgoff); | |
273 | } | |
274 | ||
275 | static void event__task_swap(event_t *self) | |
276 | { | |
277 | self->fork.pid = bswap_32(self->fork.pid); | |
278 | self->fork.tid = bswap_32(self->fork.tid); | |
279 | self->fork.ppid = bswap_32(self->fork.ppid); | |
280 | self->fork.ptid = bswap_32(self->fork.ptid); | |
281 | self->fork.time = bswap_64(self->fork.time); | |
282 | } | |
283 | ||
284 | static void event__read_swap(event_t *self) | |
285 | { | |
286 | self->read.pid = bswap_32(self->read.pid); | |
287 | self->read.tid = bswap_32(self->read.tid); | |
288 | self->read.value = bswap_64(self->read.value); | |
289 | self->read.time_enabled = bswap_64(self->read.time_enabled); | |
290 | self->read.time_running = bswap_64(self->read.time_running); | |
291 | self->read.id = bswap_64(self->read.id); | |
292 | } | |
293 | ||
2c46dbb5 TZ |
294 | static void event__attr_swap(event_t *self) |
295 | { | |
296 | size_t size; | |
297 | ||
298 | self->attr.attr.type = bswap_32(self->attr.attr.type); | |
299 | self->attr.attr.size = bswap_32(self->attr.attr.size); | |
300 | self->attr.attr.config = bswap_64(self->attr.attr.config); | |
301 | self->attr.attr.sample_period = bswap_64(self->attr.attr.sample_period); | |
302 | self->attr.attr.sample_type = bswap_64(self->attr.attr.sample_type); | |
303 | self->attr.attr.read_format = bswap_64(self->attr.attr.read_format); | |
304 | self->attr.attr.wakeup_events = bswap_32(self->attr.attr.wakeup_events); | |
305 | self->attr.attr.bp_type = bswap_32(self->attr.attr.bp_type); | |
306 | self->attr.attr.bp_addr = bswap_64(self->attr.attr.bp_addr); | |
307 | self->attr.attr.bp_len = bswap_64(self->attr.attr.bp_len); | |
308 | ||
309 | size = self->header.size; | |
310 | size -= (void *)&self->attr.id - (void *)self; | |
311 | mem_bswap_64(self->attr.id, size); | |
312 | } | |
313 | ||
cd19a035 TZ |
314 | static void event__event_type_swap(event_t *self) |
315 | { | |
316 | self->event_type.event_type.event_id = | |
317 | bswap_64(self->event_type.event_type.event_id); | |
318 | } | |
319 | ||
9215545e TZ |
320 | static void event__tracing_data_swap(event_t *self) |
321 | { | |
322 | self->tracing_data.size = bswap_32(self->tracing_data.size); | |
323 | } | |
324 | ||
ba21594c ACM |
325 | typedef void (*event__swap_op)(event_t *self); |
326 | ||
327 | static event__swap_op event__swap_ops[] = { | |
328 | [PERF_RECORD_MMAP] = event__mmap_swap, | |
329 | [PERF_RECORD_COMM] = event__comm_swap, | |
330 | [PERF_RECORD_FORK] = event__task_swap, | |
331 | [PERF_RECORD_EXIT] = event__task_swap, | |
332 | [PERF_RECORD_LOST] = event__all64_swap, | |
333 | [PERF_RECORD_READ] = event__read_swap, | |
334 | [PERF_RECORD_SAMPLE] = event__all64_swap, | |
2c46dbb5 | 335 | [PERF_RECORD_HEADER_ATTR] = event__attr_swap, |
cd19a035 | 336 | [PERF_RECORD_HEADER_EVENT_TYPE] = event__event_type_swap, |
9215545e | 337 | [PERF_RECORD_HEADER_TRACING_DATA] = event__tracing_data_swap, |
c7929e47 | 338 | [PERF_RECORD_HEADER_BUILD_ID] = NULL, |
8dc58101 | 339 | [PERF_RECORD_HEADER_MAX] = NULL, |
ba21594c ACM |
340 | }; |
341 | ||
c61e52ee FW |
342 | struct sample_queue { |
343 | u64 timestamp; | |
344 | struct sample_event *event; | |
345 | struct list_head list; | |
346 | }; | |
347 | ||
c61e52ee FW |
348 | static void flush_sample_queue(struct perf_session *s, |
349 | struct perf_event_ops *ops) | |
350 | { | |
351 | struct list_head *head = &s->ordered_samples.samples_head; | |
d6b17beb | 352 | u64 limit = s->ordered_samples.next_flush; |
c61e52ee FW |
353 | struct sample_queue *tmp, *iter; |
354 | ||
d6b17beb | 355 | if (!ops->ordered_samples || !limit) |
c61e52ee FW |
356 | return; |
357 | ||
358 | list_for_each_entry_safe(iter, tmp, head, list) { | |
359 | if (iter->timestamp > limit) | |
360 | return; | |
361 | ||
362 | if (iter == s->ordered_samples.last_inserted) | |
363 | s->ordered_samples.last_inserted = NULL; | |
364 | ||
365 | ops->sample((event_t *)iter->event, s); | |
366 | ||
367 | s->ordered_samples.last_flush = iter->timestamp; | |
368 | list_del(&iter->list); | |
369 | free(iter->event); | |
370 | free(iter); | |
371 | } | |
372 | } | |
373 | ||
d6b17beb FW |
374 | /* |
375 | * When perf record finishes a pass on every buffers, it records this pseudo | |
376 | * event. | |
377 | * We record the max timestamp t found in the pass n. | |
378 | * Assuming these timestamps are monotonic across cpus, we know that if | |
379 | * a buffer still has events with timestamps below t, they will be all | |
380 | * available and then read in the pass n + 1. | |
381 | * Hence when we start to read the pass n + 2, we can safely flush every | |
382 | * events with timestamps below t. | |
383 | * | |
384 | * ============ PASS n ================= | |
385 | * CPU 0 | CPU 1 | |
386 | * | | |
387 | * cnt1 timestamps | cnt2 timestamps | |
388 | * 1 | 2 | |
389 | * 2 | 3 | |
390 | * - | 4 <--- max recorded | |
391 | * | |
392 | * ============ PASS n + 1 ============== | |
393 | * CPU 0 | CPU 1 | |
394 | * | | |
395 | * cnt1 timestamps | cnt2 timestamps | |
396 | * 3 | 5 | |
397 | * 4 | 6 | |
398 | * 5 | 7 <---- max recorded | |
399 | * | |
400 | * Flush every events below timestamp 4 | |
401 | * | |
402 | * ============ PASS n + 2 ============== | |
403 | * CPU 0 | CPU 1 | |
404 | * | | |
405 | * cnt1 timestamps | cnt2 timestamps | |
406 | * 6 | 8 | |
407 | * 7 | 9 | |
408 | * - | 10 | |
409 | * | |
410 | * Flush every events below timestamp 7 | |
411 | * etc... | |
412 | */ | |
413 | static int process_finished_round(event_t *event __used, | |
414 | struct perf_session *session, | |
415 | struct perf_event_ops *ops) | |
416 | { | |
417 | flush_sample_queue(session, ops); | |
418 | session->ordered_samples.next_flush = session->ordered_samples.max_timestamp; | |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
c61e52ee FW |
423 | static void __queue_sample_end(struct sample_queue *new, struct list_head *head) |
424 | { | |
425 | struct sample_queue *iter; | |
426 | ||
427 | list_for_each_entry_reverse(iter, head, list) { | |
428 | if (iter->timestamp < new->timestamp) { | |
429 | list_add(&new->list, &iter->list); | |
430 | return; | |
431 | } | |
432 | } | |
433 | ||
434 | list_add(&new->list, head); | |
435 | } | |
436 | ||
437 | static void __queue_sample_before(struct sample_queue *new, | |
438 | struct sample_queue *iter, | |
439 | struct list_head *head) | |
440 | { | |
441 | list_for_each_entry_continue_reverse(iter, head, list) { | |
442 | if (iter->timestamp < new->timestamp) { | |
443 | list_add(&new->list, &iter->list); | |
444 | return; | |
445 | } | |
446 | } | |
447 | ||
448 | list_add(&new->list, head); | |
449 | } | |
450 | ||
451 | static void __queue_sample_after(struct sample_queue *new, | |
452 | struct sample_queue *iter, | |
453 | struct list_head *head) | |
454 | { | |
455 | list_for_each_entry_continue(iter, head, list) { | |
456 | if (iter->timestamp > new->timestamp) { | |
457 | list_add_tail(&new->list, &iter->list); | |
458 | return; | |
459 | } | |
460 | } | |
461 | list_add_tail(&new->list, head); | |
462 | } | |
463 | ||
464 | /* The queue is ordered by time */ | |
465 | static void __queue_sample_event(struct sample_queue *new, | |
466 | struct perf_session *s) | |
467 | { | |
468 | struct sample_queue *last_inserted = s->ordered_samples.last_inserted; | |
469 | struct list_head *head = &s->ordered_samples.samples_head; | |
470 | ||
471 | ||
472 | if (!last_inserted) { | |
473 | __queue_sample_end(new, head); | |
474 | return; | |
475 | } | |
476 | ||
477 | /* | |
478 | * Most of the time the current event has a timestamp | |
479 | * very close to the last event inserted, unless we just switched | |
480 | * to another event buffer. Having a sorting based on a list and | |
481 | * on the last inserted event that is close to the current one is | |
482 | * probably more efficient than an rbtree based sorting. | |
483 | */ | |
484 | if (last_inserted->timestamp >= new->timestamp) | |
485 | __queue_sample_before(new, last_inserted, head); | |
486 | else | |
487 | __queue_sample_after(new, last_inserted, head); | |
488 | } | |
489 | ||
490 | static int queue_sample_event(event_t *event, struct sample_data *data, | |
d6b17beb | 491 | struct perf_session *s) |
c61e52ee FW |
492 | { |
493 | u64 timestamp = data->time; | |
494 | struct sample_queue *new; | |
c61e52ee FW |
495 | |
496 | ||
c61e52ee FW |
497 | if (timestamp < s->ordered_samples.last_flush) { |
498 | printf("Warning: Timestamp below last timeslice flush\n"); | |
499 | return -EINVAL; | |
500 | } | |
501 | ||
502 | new = malloc(sizeof(*new)); | |
503 | if (!new) | |
504 | return -ENOMEM; | |
505 | ||
506 | new->timestamp = timestamp; | |
507 | ||
508 | new->event = malloc(event->header.size); | |
509 | if (!new->event) { | |
510 | free(new); | |
511 | return -ENOMEM; | |
512 | } | |
513 | ||
514 | memcpy(new->event, event, event->header.size); | |
515 | ||
516 | __queue_sample_event(new, s); | |
517 | s->ordered_samples.last_inserted = new; | |
518 | ||
d6b17beb FW |
519 | if (new->timestamp > s->ordered_samples.max_timestamp) |
520 | s->ordered_samples.max_timestamp = new->timestamp; | |
c61e52ee FW |
521 | |
522 | return 0; | |
523 | } | |
524 | ||
525 | static int perf_session__process_sample(event_t *event, struct perf_session *s, | |
526 | struct perf_event_ops *ops) | |
527 | { | |
528 | struct sample_data data; | |
529 | ||
530 | if (!ops->ordered_samples) | |
531 | return ops->sample(event, s); | |
532 | ||
533 | bzero(&data, sizeof(struct sample_data)); | |
534 | event__parse_sample(event, s->sample_type, &data); | |
535 | ||
d6b17beb | 536 | queue_sample_event(event, &data, s); |
c61e52ee FW |
537 | |
538 | return 0; | |
539 | } | |
540 | ||
06aae590 ACM |
541 | static int perf_session__process_event(struct perf_session *self, |
542 | event_t *event, | |
543 | struct perf_event_ops *ops, | |
ba21594c | 544 | u64 offset, u64 head) |
06aae590 ACM |
545 | { |
546 | trace_event(event); | |
547 | ||
8dc58101 | 548 | if (event->header.type < PERF_RECORD_HEADER_MAX) { |
ba21594c | 549 | dump_printf("%#Lx [%#x]: PERF_RECORD_%s", |
0d755034 | 550 | offset + head, event->header.size, |
06aae590 | 551 | event__name[event->header.type]); |
cee75ac7 | 552 | hists__inc_nr_events(&self->hists, event->header.type); |
06aae590 ACM |
553 | } |
554 | ||
ba21594c ACM |
555 | if (self->header.needs_swap && event__swap_ops[event->header.type]) |
556 | event__swap_ops[event->header.type](event); | |
557 | ||
06aae590 ACM |
558 | switch (event->header.type) { |
559 | case PERF_RECORD_SAMPLE: | |
c61e52ee | 560 | return perf_session__process_sample(event, self, ops); |
06aae590 | 561 | case PERF_RECORD_MMAP: |
55aa640f | 562 | return ops->mmap(event, self); |
06aae590 | 563 | case PERF_RECORD_COMM: |
55aa640f | 564 | return ops->comm(event, self); |
06aae590 | 565 | case PERF_RECORD_FORK: |
55aa640f | 566 | return ops->fork(event, self); |
06aae590 | 567 | case PERF_RECORD_EXIT: |
55aa640f | 568 | return ops->exit(event, self); |
06aae590 | 569 | case PERF_RECORD_LOST: |
55aa640f | 570 | return ops->lost(event, self); |
06aae590 | 571 | case PERF_RECORD_READ: |
55aa640f | 572 | return ops->read(event, self); |
06aae590 | 573 | case PERF_RECORD_THROTTLE: |
55aa640f | 574 | return ops->throttle(event, self); |
06aae590 | 575 | case PERF_RECORD_UNTHROTTLE: |
55aa640f | 576 | return ops->unthrottle(event, self); |
2c46dbb5 TZ |
577 | case PERF_RECORD_HEADER_ATTR: |
578 | return ops->attr(event, self); | |
cd19a035 TZ |
579 | case PERF_RECORD_HEADER_EVENT_TYPE: |
580 | return ops->event_type(event, self); | |
9215545e TZ |
581 | case PERF_RECORD_HEADER_TRACING_DATA: |
582 | /* setup for reading amidst mmap */ | |
583 | lseek(self->fd, offset + head, SEEK_SET); | |
584 | return ops->tracing_data(event, self); | |
c7929e47 TZ |
585 | case PERF_RECORD_HEADER_BUILD_ID: |
586 | return ops->build_id(event, self); | |
d6b17beb FW |
587 | case PERF_RECORD_FINISHED_ROUND: |
588 | return ops->finished_round(event, self, ops); | |
06aae590 | 589 | default: |
c8446b9b | 590 | ++self->hists.stats.nr_unknown_events; |
06aae590 ACM |
591 | return -1; |
592 | } | |
593 | } | |
594 | ||
ba21594c ACM |
595 | void perf_event_header__bswap(struct perf_event_header *self) |
596 | { | |
597 | self->type = bswap_32(self->type); | |
598 | self->misc = bswap_16(self->misc); | |
599 | self->size = bswap_16(self->size); | |
600 | } | |
601 | ||
06aae590 ACM |
602 | static struct thread *perf_session__register_idle_thread(struct perf_session *self) |
603 | { | |
604 | struct thread *thread = perf_session__findnew(self, 0); | |
605 | ||
606 | if (thread == NULL || thread__set_comm(thread, "swapper")) { | |
607 | pr_err("problem inserting idle task.\n"); | |
608 | thread = NULL; | |
609 | } | |
610 | ||
611 | return thread; | |
612 | } | |
613 | ||
8dc58101 TZ |
614 | int do_read(int fd, void *buf, size_t size) |
615 | { | |
616 | void *buf_start = buf; | |
617 | ||
618 | while (size) { | |
619 | int ret = read(fd, buf, size); | |
620 | ||
621 | if (ret <= 0) | |
622 | return ret; | |
623 | ||
624 | size -= ret; | |
625 | buf += ret; | |
626 | } | |
627 | ||
628 | return buf - buf_start; | |
629 | } | |
630 | ||
631 | #define session_done() (*(volatile int *)(&session_done)) | |
632 | volatile int session_done; | |
633 | ||
634 | static int __perf_session__process_pipe_events(struct perf_session *self, | |
635 | struct perf_event_ops *ops) | |
636 | { | |
637 | event_t event; | |
638 | uint32_t size; | |
639 | int skip = 0; | |
640 | u64 head; | |
641 | int err; | |
642 | void *p; | |
643 | ||
644 | perf_event_ops__fill_defaults(ops); | |
645 | ||
646 | head = 0; | |
647 | more: | |
648 | err = do_read(self->fd, &event, sizeof(struct perf_event_header)); | |
649 | if (err <= 0) { | |
650 | if (err == 0) | |
651 | goto done; | |
652 | ||
653 | pr_err("failed to read event header\n"); | |
654 | goto out_err; | |
655 | } | |
656 | ||
657 | if (self->header.needs_swap) | |
658 | perf_event_header__bswap(&event.header); | |
659 | ||
660 | size = event.header.size; | |
661 | if (size == 0) | |
662 | size = 8; | |
663 | ||
664 | p = &event; | |
665 | p += sizeof(struct perf_event_header); | |
666 | ||
794e43b5 TZ |
667 | if (size - sizeof(struct perf_event_header)) { |
668 | err = do_read(self->fd, p, | |
669 | size - sizeof(struct perf_event_header)); | |
670 | if (err <= 0) { | |
671 | if (err == 0) { | |
672 | pr_err("unexpected end of event stream\n"); | |
673 | goto done; | |
674 | } | |
8dc58101 | 675 | |
794e43b5 TZ |
676 | pr_err("failed to read event data\n"); |
677 | goto out_err; | |
678 | } | |
8dc58101 TZ |
679 | } |
680 | ||
681 | if (size == 0 || | |
682 | (skip = perf_session__process_event(self, &event, ops, | |
683 | 0, head)) < 0) { | |
684 | dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n", | |
685 | head, event.header.size, event.header.type); | |
686 | /* | |
687 | * assume we lost track of the stream, check alignment, and | |
688 | * increment a single u64 in the hope to catch on again 'soon'. | |
689 | */ | |
690 | if (unlikely(head & 7)) | |
691 | head &= ~7ULL; | |
692 | ||
693 | size = 8; | |
694 | } | |
695 | ||
696 | head += size; | |
697 | ||
698 | dump_printf("\n%#Lx [%#x]: event: %d\n", | |
699 | head, event.header.size, event.header.type); | |
700 | ||
701 | if (skip > 0) | |
702 | head += skip; | |
703 | ||
704 | if (!session_done()) | |
705 | goto more; | |
706 | done: | |
707 | err = 0; | |
708 | out_err: | |
709 | return err; | |
710 | } | |
711 | ||
6122e4e4 ACM |
712 | int __perf_session__process_events(struct perf_session *self, |
713 | u64 data_offset, u64 data_size, | |
714 | u64 file_size, struct perf_event_ops *ops) | |
06aae590 | 715 | { |
ba21594c ACM |
716 | int err, mmap_prot, mmap_flags; |
717 | u64 head, shift; | |
718 | u64 offset = 0; | |
06aae590 ACM |
719 | size_t page_size; |
720 | event_t *event; | |
721 | uint32_t size; | |
722 | char *buf; | |
5f4d3f88 ACM |
723 | struct ui_progress *progress = ui_progress__new("Processing events...", |
724 | self->size); | |
725 | if (progress == NULL) | |
726 | return -1; | |
06aae590 | 727 | |
06aae590 ACM |
728 | perf_event_ops__fill_defaults(ops); |
729 | ||
1b75962e | 730 | page_size = sysconf(_SC_PAGESIZE); |
06aae590 | 731 | |
6122e4e4 | 732 | head = data_offset; |
06aae590 ACM |
733 | shift = page_size * (head / page_size); |
734 | offset += shift; | |
735 | head -= shift; | |
736 | ||
ba21594c ACM |
737 | mmap_prot = PROT_READ; |
738 | mmap_flags = MAP_SHARED; | |
739 | ||
740 | if (self->header.needs_swap) { | |
741 | mmap_prot |= PROT_WRITE; | |
742 | mmap_flags = MAP_PRIVATE; | |
743 | } | |
06aae590 | 744 | remap: |
ba21594c ACM |
745 | buf = mmap(NULL, page_size * self->mmap_window, mmap_prot, |
746 | mmap_flags, self->fd, offset); | |
06aae590 ACM |
747 | if (buf == MAP_FAILED) { |
748 | pr_err("failed to mmap file\n"); | |
749 | err = -errno; | |
750 | goto out_err; | |
751 | } | |
752 | ||
753 | more: | |
754 | event = (event_t *)(buf + head); | |
5f4d3f88 | 755 | ui_progress__update(progress, offset); |
06aae590 | 756 | |
ba21594c ACM |
757 | if (self->header.needs_swap) |
758 | perf_event_header__bswap(&event->header); | |
06aae590 ACM |
759 | size = event->header.size; |
760 | if (size == 0) | |
761 | size = 8; | |
762 | ||
763 | if (head + event->header.size >= page_size * self->mmap_window) { | |
764 | int munmap_ret; | |
765 | ||
766 | shift = page_size * (head / page_size); | |
767 | ||
768 | munmap_ret = munmap(buf, page_size * self->mmap_window); | |
769 | assert(munmap_ret == 0); | |
770 | ||
771 | offset += shift; | |
772 | head -= shift; | |
773 | goto remap; | |
774 | } | |
775 | ||
776 | size = event->header.size; | |
777 | ||
ba21594c | 778 | dump_printf("\n%#Lx [%#x]: event: %d\n", |
0d755034 | 779 | offset + head, event->header.size, event->header.type); |
06aae590 ACM |
780 | |
781 | if (size == 0 || | |
782 | perf_session__process_event(self, event, ops, offset, head) < 0) { | |
ba21594c | 783 | dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n", |
0d755034 | 784 | offset + head, event->header.size, |
06aae590 ACM |
785 | event->header.type); |
786 | /* | |
787 | * assume we lost track of the stream, check alignment, and | |
788 | * increment a single u64 in the hope to catch on again 'soon'. | |
789 | */ | |
790 | if (unlikely(head & 7)) | |
791 | head &= ~7ULL; | |
792 | ||
793 | size = 8; | |
794 | } | |
795 | ||
796 | head += size; | |
797 | ||
6122e4e4 | 798 | if (offset + head >= data_offset + data_size) |
06aae590 ACM |
799 | goto done; |
800 | ||
6122e4e4 | 801 | if (offset + head < file_size) |
06aae590 ACM |
802 | goto more; |
803 | done: | |
804 | err = 0; | |
c61e52ee | 805 | /* do the final flush for ordered samples */ |
d6b17beb | 806 | self->ordered_samples.next_flush = ULLONG_MAX; |
c61e52ee | 807 | flush_sample_queue(self, ops); |
06aae590 | 808 | out_err: |
5f4d3f88 | 809 | ui_progress__delete(progress); |
06aae590 ACM |
810 | return err; |
811 | } | |
27295592 | 812 | |
6122e4e4 ACM |
813 | int perf_session__process_events(struct perf_session *self, |
814 | struct perf_event_ops *ops) | |
815 | { | |
816 | int err; | |
817 | ||
818 | if (perf_session__register_idle_thread(self) == NULL) | |
819 | return -ENOMEM; | |
820 | ||
821 | if (!symbol_conf.full_paths) { | |
822 | char bf[PATH_MAX]; | |
823 | ||
824 | if (getcwd(bf, sizeof(bf)) == NULL) { | |
825 | err = -errno; | |
826 | out_getcwd_err: | |
827 | pr_err("failed to get the current directory\n"); | |
828 | goto out_err; | |
829 | } | |
830 | self->cwd = strdup(bf); | |
831 | if (self->cwd == NULL) { | |
832 | err = -ENOMEM; | |
833 | goto out_getcwd_err; | |
834 | } | |
835 | self->cwdlen = strlen(self->cwd); | |
836 | } | |
837 | ||
8dc58101 TZ |
838 | if (!self->fd_pipe) |
839 | err = __perf_session__process_events(self, | |
840 | self->header.data_offset, | |
841 | self->header.data_size, | |
842 | self->size, ops); | |
843 | else | |
844 | err = __perf_session__process_pipe_events(self, ops); | |
6122e4e4 ACM |
845 | out_err: |
846 | return err; | |
847 | } | |
848 | ||
d549c769 | 849 | bool perf_session__has_traces(struct perf_session *self, const char *msg) |
27295592 ACM |
850 | { |
851 | if (!(self->sample_type & PERF_SAMPLE_RAW)) { | |
d549c769 ACM |
852 | pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); |
853 | return false; | |
27295592 ACM |
854 | } |
855 | ||
d549c769 | 856 | return true; |
27295592 | 857 | } |
56b03f3c | 858 | |
a1645ce1 | 859 | int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps, |
56b03f3c ACM |
860 | const char *symbol_name, |
861 | u64 addr) | |
862 | { | |
863 | char *bracket; | |
9de89fe7 | 864 | enum map_type i; |
a1645ce1 ZY |
865 | struct ref_reloc_sym *ref; |
866 | ||
867 | ref = zalloc(sizeof(struct ref_reloc_sym)); | |
868 | if (ref == NULL) | |
869 | return -ENOMEM; | |
56b03f3c | 870 | |
a1645ce1 ZY |
871 | ref->name = strdup(symbol_name); |
872 | if (ref->name == NULL) { | |
873 | free(ref); | |
56b03f3c | 874 | return -ENOMEM; |
a1645ce1 | 875 | } |
56b03f3c | 876 | |
a1645ce1 | 877 | bracket = strchr(ref->name, ']'); |
56b03f3c ACM |
878 | if (bracket) |
879 | *bracket = '\0'; | |
880 | ||
a1645ce1 | 881 | ref->addr = addr; |
9de89fe7 ACM |
882 | |
883 | for (i = 0; i < MAP__NR_TYPES; ++i) { | |
a1645ce1 ZY |
884 | struct kmap *kmap = map__kmap(maps[i]); |
885 | kmap->ref_reloc_sym = ref; | |
9de89fe7 ACM |
886 | } |
887 | ||
56b03f3c ACM |
888 | return 0; |
889 | } | |
1f626bc3 ACM |
890 | |
891 | size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) | |
892 | { | |
893 | return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) + | |
894 | __dsos__fprintf(&self->host_machine.user_dsos, fp) + | |
895 | machines__fprintf_dsos(&self->machines, fp); | |
896 | } |