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 ACM |
29 | if (self->fd < 0) { |
30 | pr_err("failed to open file: %s", self->filename); | |
31 | if (!strcmp(self->filename, "perf.data")) | |
32 | pr_err(" (try 'perf record' first)"); | |
33 | pr_err("\n"); | |
34 | return -errno; | |
35 | } | |
36 | ||
37 | if (fstat(self->fd, &input_stat) < 0) | |
38 | goto out_close; | |
39 | ||
40 | if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) { | |
41 | pr_err("file %s not owned by current user or root\n", | |
42 | self->filename); | |
43 | goto out_close; | |
44 | } | |
45 | ||
46 | if (!input_stat.st_size) { | |
47 | pr_info("zero-sized file (%s), nothing to do!\n", | |
48 | self->filename); | |
49 | goto out_close; | |
50 | } | |
51 | ||
8dc58101 | 52 | if (perf_header__read(self, self->fd) < 0) { |
94c744b6 ACM |
53 | pr_err("incompatible file format"); |
54 | goto out_close; | |
55 | } | |
56 | ||
57 | self->size = input_stat.st_size; | |
58 | return 0; | |
59 | ||
60 | out_close: | |
61 | close(self->fd); | |
62 | self->fd = -1; | |
63 | return -1; | |
64 | } | |
65 | ||
8dc58101 TZ |
66 | void perf_session__update_sample_type(struct perf_session *self) |
67 | { | |
68 | self->sample_type = perf_header__sample_type(&self->header); | |
69 | } | |
70 | ||
a1645ce1 ZY |
71 | int perf_session__create_kernel_maps(struct perf_session *self) |
72 | { | |
d118f8ba | 73 | int ret = machine__create_kernel_maps(&self->host_machine); |
a1645ce1 | 74 | |
a1645ce1 | 75 | if (ret >= 0) |
d118f8ba | 76 | ret = machines__create_guest_kernel_maps(&self->machines); |
a1645ce1 ZY |
77 | return ret; |
78 | } | |
79 | ||
454c407e | 80 | struct perf_session *perf_session__new(const char *filename, int mode, bool force, bool repipe) |
94c744b6 | 81 | { |
b3165f41 | 82 | size_t len = filename ? strlen(filename) + 1 : 0; |
94c744b6 ACM |
83 | struct perf_session *self = zalloc(sizeof(*self) + len); |
84 | ||
85 | if (self == NULL) | |
86 | goto out; | |
87 | ||
88 | if (perf_header__init(&self->header) < 0) | |
4aa65636 | 89 | goto out_free; |
94c744b6 ACM |
90 | |
91 | memcpy(self->filename, filename, len); | |
b3165f41 | 92 | self->threads = RB_ROOT; |
1c02c4d2 | 93 | self->hists_tree = RB_ROOT; |
b3165f41 | 94 | self->last_match = NULL; |
ec913369 ACM |
95 | self->mmap_window = 32; |
96 | self->cwd = NULL; | |
97 | self->cwdlen = 0; | |
23346f21 | 98 | self->machines = RB_ROOT; |
454c407e | 99 | self->repipe = repipe; |
c61e52ee | 100 | INIT_LIST_HEAD(&self->ordered_samples.samples_head); |
1f626bc3 | 101 | machine__init(&self->host_machine, "", HOST_KERNEL_ID); |
94c744b6 | 102 | |
64abebf7 ACM |
103 | if (mode == O_RDONLY) { |
104 | if (perf_session__open(self, force) < 0) | |
105 | goto out_delete; | |
106 | } else if (mode == O_WRONLY) { | |
107 | /* | |
108 | * In O_RDONLY mode this will be performed when reading the | |
109 | * kernel MMAP event, in event__process_mmap(). | |
110 | */ | |
111 | if (perf_session__create_kernel_maps(self) < 0) | |
112 | goto out_delete; | |
113 | } | |
d549c769 | 114 | |
8dc58101 | 115 | perf_session__update_sample_type(self); |
94c744b6 ACM |
116 | out: |
117 | return self; | |
4aa65636 | 118 | out_free: |
94c744b6 ACM |
119 | free(self); |
120 | return NULL; | |
4aa65636 ACM |
121 | out_delete: |
122 | perf_session__delete(self); | |
123 | return NULL; | |
94c744b6 ACM |
124 | } |
125 | ||
126 | void perf_session__delete(struct perf_session *self) | |
127 | { | |
128 | perf_header__exit(&self->header); | |
129 | close(self->fd); | |
ec913369 | 130 | free(self->cwd); |
94c744b6 ACM |
131 | free(self); |
132 | } | |
a328626b ACM |
133 | |
134 | static bool symbol__match_parent_regex(struct symbol *sym) | |
135 | { | |
136 | if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0)) | |
137 | return 1; | |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
b3c9ac08 ACM |
142 | struct map_symbol *perf_session__resolve_callchain(struct perf_session *self, |
143 | struct thread *thread, | |
144 | struct ip_callchain *chain, | |
145 | struct symbol **parent) | |
a328626b ACM |
146 | { |
147 | u8 cpumode = PERF_RECORD_MISC_USER; | |
a328626b | 148 | unsigned int i; |
ad5b217b | 149 | struct map_symbol *syms = calloc(chain->nr, sizeof(*syms)); |
a328626b | 150 | |
ad5b217b ACM |
151 | if (!syms) |
152 | return NULL; | |
a328626b ACM |
153 | |
154 | for (i = 0; i < chain->nr; i++) { | |
155 | u64 ip = chain->ips[i]; | |
156 | struct addr_location al; | |
157 | ||
158 | if (ip >= PERF_CONTEXT_MAX) { | |
159 | switch (ip) { | |
160 | case PERF_CONTEXT_HV: | |
161 | cpumode = PERF_RECORD_MISC_HYPERVISOR; break; | |
162 | case PERF_CONTEXT_KERNEL: | |
163 | cpumode = PERF_RECORD_MISC_KERNEL; break; | |
164 | case PERF_CONTEXT_USER: | |
165 | cpumode = PERF_RECORD_MISC_USER; break; | |
166 | default: | |
167 | break; | |
168 | } | |
169 | continue; | |
170 | } | |
171 | ||
a1645ce1 | 172 | al.filtered = false; |
a328626b | 173 | thread__find_addr_location(thread, self, cpumode, |
a1645ce1 | 174 | MAP__FUNCTION, thread->pid, ip, &al, NULL); |
a328626b ACM |
175 | if (al.sym != NULL) { |
176 | if (sort__has_parent && !*parent && | |
177 | symbol__match_parent_regex(al.sym)) | |
178 | *parent = al.sym; | |
d599db3f | 179 | if (!symbol_conf.use_callchain) |
a328626b | 180 | break; |
b3c9ac08 ACM |
181 | syms[i].map = al.map; |
182 | syms[i].sym = al.sym; | |
a328626b ACM |
183 | } |
184 | } | |
185 | ||
186 | return syms; | |
187 | } | |
06aae590 ACM |
188 | |
189 | static int process_event_stub(event_t *event __used, | |
190 | struct perf_session *session __used) | |
191 | { | |
192 | dump_printf(": unhandled!\n"); | |
193 | return 0; | |
194 | } | |
195 | ||
d6b17beb FW |
196 | static int process_finished_round_stub(event_t *event __used, |
197 | struct perf_session *session __used, | |
198 | struct perf_event_ops *ops __used) | |
199 | { | |
200 | dump_printf(": unhandled!\n"); | |
201 | return 0; | |
202 | } | |
203 | ||
204 | static int process_finished_round(event_t *event, | |
205 | struct perf_session *session, | |
206 | struct perf_event_ops *ops); | |
207 | ||
06aae590 ACM |
208 | static void perf_event_ops__fill_defaults(struct perf_event_ops *handler) |
209 | { | |
55aa640f ACM |
210 | if (handler->sample == NULL) |
211 | handler->sample = process_event_stub; | |
212 | if (handler->mmap == NULL) | |
213 | handler->mmap = process_event_stub; | |
214 | if (handler->comm == NULL) | |
215 | handler->comm = process_event_stub; | |
216 | if (handler->fork == NULL) | |
217 | handler->fork = process_event_stub; | |
218 | if (handler->exit == NULL) | |
219 | handler->exit = process_event_stub; | |
220 | if (handler->lost == NULL) | |
221 | handler->lost = process_event_stub; | |
222 | if (handler->read == NULL) | |
223 | handler->read = process_event_stub; | |
224 | if (handler->throttle == NULL) | |
225 | handler->throttle = process_event_stub; | |
226 | if (handler->unthrottle == NULL) | |
227 | handler->unthrottle = process_event_stub; | |
2c46dbb5 TZ |
228 | if (handler->attr == NULL) |
229 | handler->attr = process_event_stub; | |
cd19a035 TZ |
230 | if (handler->event_type == NULL) |
231 | handler->event_type = process_event_stub; | |
9215545e TZ |
232 | if (handler->tracing_data == NULL) |
233 | handler->tracing_data = process_event_stub; | |
c7929e47 TZ |
234 | if (handler->build_id == NULL) |
235 | handler->build_id = process_event_stub; | |
d6b17beb FW |
236 | if (handler->finished_round == NULL) { |
237 | if (handler->ordered_samples) | |
238 | handler->finished_round = process_finished_round; | |
239 | else | |
240 | handler->finished_round = process_finished_round_stub; | |
241 | } | |
06aae590 ACM |
242 | } |
243 | ||
ba21594c ACM |
244 | void mem_bswap_64(void *src, int byte_size) |
245 | { | |
246 | u64 *m = src; | |
247 | ||
248 | while (byte_size > 0) { | |
249 | *m = bswap_64(*m); | |
250 | byte_size -= sizeof(u64); | |
251 | ++m; | |
252 | } | |
253 | } | |
254 | ||
255 | static void event__all64_swap(event_t *self) | |
256 | { | |
257 | struct perf_event_header *hdr = &self->header; | |
258 | mem_bswap_64(hdr + 1, self->header.size - sizeof(*hdr)); | |
259 | } | |
260 | ||
261 | static void event__comm_swap(event_t *self) | |
262 | { | |
263 | self->comm.pid = bswap_32(self->comm.pid); | |
264 | self->comm.tid = bswap_32(self->comm.tid); | |
265 | } | |
266 | ||
267 | static void event__mmap_swap(event_t *self) | |
268 | { | |
269 | self->mmap.pid = bswap_32(self->mmap.pid); | |
270 | self->mmap.tid = bswap_32(self->mmap.tid); | |
271 | self->mmap.start = bswap_64(self->mmap.start); | |
272 | self->mmap.len = bswap_64(self->mmap.len); | |
273 | self->mmap.pgoff = bswap_64(self->mmap.pgoff); | |
274 | } | |
275 | ||
276 | static void event__task_swap(event_t *self) | |
277 | { | |
278 | self->fork.pid = bswap_32(self->fork.pid); | |
279 | self->fork.tid = bswap_32(self->fork.tid); | |
280 | self->fork.ppid = bswap_32(self->fork.ppid); | |
281 | self->fork.ptid = bswap_32(self->fork.ptid); | |
282 | self->fork.time = bswap_64(self->fork.time); | |
283 | } | |
284 | ||
285 | static void event__read_swap(event_t *self) | |
286 | { | |
287 | self->read.pid = bswap_32(self->read.pid); | |
288 | self->read.tid = bswap_32(self->read.tid); | |
289 | self->read.value = bswap_64(self->read.value); | |
290 | self->read.time_enabled = bswap_64(self->read.time_enabled); | |
291 | self->read.time_running = bswap_64(self->read.time_running); | |
292 | self->read.id = bswap_64(self->read.id); | |
293 | } | |
294 | ||
2c46dbb5 TZ |
295 | static void event__attr_swap(event_t *self) |
296 | { | |
297 | size_t size; | |
298 | ||
299 | self->attr.attr.type = bswap_32(self->attr.attr.type); | |
300 | self->attr.attr.size = bswap_32(self->attr.attr.size); | |
301 | self->attr.attr.config = bswap_64(self->attr.attr.config); | |
302 | self->attr.attr.sample_period = bswap_64(self->attr.attr.sample_period); | |
303 | self->attr.attr.sample_type = bswap_64(self->attr.attr.sample_type); | |
304 | self->attr.attr.read_format = bswap_64(self->attr.attr.read_format); | |
305 | self->attr.attr.wakeup_events = bswap_32(self->attr.attr.wakeup_events); | |
306 | self->attr.attr.bp_type = bswap_32(self->attr.attr.bp_type); | |
307 | self->attr.attr.bp_addr = bswap_64(self->attr.attr.bp_addr); | |
308 | self->attr.attr.bp_len = bswap_64(self->attr.attr.bp_len); | |
309 | ||
310 | size = self->header.size; | |
311 | size -= (void *)&self->attr.id - (void *)self; | |
312 | mem_bswap_64(self->attr.id, size); | |
313 | } | |
314 | ||
cd19a035 TZ |
315 | static void event__event_type_swap(event_t *self) |
316 | { | |
317 | self->event_type.event_type.event_id = | |
318 | bswap_64(self->event_type.event_type.event_id); | |
319 | } | |
320 | ||
9215545e TZ |
321 | static void event__tracing_data_swap(event_t *self) |
322 | { | |
323 | self->tracing_data.size = bswap_32(self->tracing_data.size); | |
324 | } | |
325 | ||
ba21594c ACM |
326 | typedef void (*event__swap_op)(event_t *self); |
327 | ||
328 | static event__swap_op event__swap_ops[] = { | |
329 | [PERF_RECORD_MMAP] = event__mmap_swap, | |
330 | [PERF_RECORD_COMM] = event__comm_swap, | |
331 | [PERF_RECORD_FORK] = event__task_swap, | |
332 | [PERF_RECORD_EXIT] = event__task_swap, | |
333 | [PERF_RECORD_LOST] = event__all64_swap, | |
334 | [PERF_RECORD_READ] = event__read_swap, | |
335 | [PERF_RECORD_SAMPLE] = event__all64_swap, | |
2c46dbb5 | 336 | [PERF_RECORD_HEADER_ATTR] = event__attr_swap, |
cd19a035 | 337 | [PERF_RECORD_HEADER_EVENT_TYPE] = event__event_type_swap, |
9215545e | 338 | [PERF_RECORD_HEADER_TRACING_DATA] = event__tracing_data_swap, |
c7929e47 | 339 | [PERF_RECORD_HEADER_BUILD_ID] = NULL, |
8dc58101 | 340 | [PERF_RECORD_HEADER_MAX] = NULL, |
ba21594c ACM |
341 | }; |
342 | ||
c61e52ee FW |
343 | struct sample_queue { |
344 | u64 timestamp; | |
345 | struct sample_event *event; | |
346 | struct list_head list; | |
347 | }; | |
348 | ||
c61e52ee FW |
349 | static void flush_sample_queue(struct perf_session *s, |
350 | struct perf_event_ops *ops) | |
351 | { | |
352 | struct list_head *head = &s->ordered_samples.samples_head; | |
d6b17beb | 353 | u64 limit = s->ordered_samples.next_flush; |
c61e52ee FW |
354 | struct sample_queue *tmp, *iter; |
355 | ||
d6b17beb | 356 | if (!ops->ordered_samples || !limit) |
c61e52ee FW |
357 | return; |
358 | ||
359 | list_for_each_entry_safe(iter, tmp, head, list) { | |
360 | if (iter->timestamp > limit) | |
361 | return; | |
362 | ||
363 | if (iter == s->ordered_samples.last_inserted) | |
364 | s->ordered_samples.last_inserted = NULL; | |
365 | ||
366 | ops->sample((event_t *)iter->event, s); | |
367 | ||
368 | s->ordered_samples.last_flush = iter->timestamp; | |
369 | list_del(&iter->list); | |
370 | free(iter->event); | |
371 | free(iter); | |
372 | } | |
373 | } | |
374 | ||
d6b17beb FW |
375 | /* |
376 | * When perf record finishes a pass on every buffers, it records this pseudo | |
377 | * event. | |
378 | * We record the max timestamp t found in the pass n. | |
379 | * Assuming these timestamps are monotonic across cpus, we know that if | |
380 | * a buffer still has events with timestamps below t, they will be all | |
381 | * available and then read in the pass n + 1. | |
382 | * Hence when we start to read the pass n + 2, we can safely flush every | |
383 | * events with timestamps below t. | |
384 | * | |
385 | * ============ PASS n ================= | |
386 | * CPU 0 | CPU 1 | |
387 | * | | |
388 | * cnt1 timestamps | cnt2 timestamps | |
389 | * 1 | 2 | |
390 | * 2 | 3 | |
391 | * - | 4 <--- max recorded | |
392 | * | |
393 | * ============ PASS n + 1 ============== | |
394 | * CPU 0 | CPU 1 | |
395 | * | | |
396 | * cnt1 timestamps | cnt2 timestamps | |
397 | * 3 | 5 | |
398 | * 4 | 6 | |
399 | * 5 | 7 <---- max recorded | |
400 | * | |
401 | * Flush every events below timestamp 4 | |
402 | * | |
403 | * ============ PASS n + 2 ============== | |
404 | * CPU 0 | CPU 1 | |
405 | * | | |
406 | * cnt1 timestamps | cnt2 timestamps | |
407 | * 6 | 8 | |
408 | * 7 | 9 | |
409 | * - | 10 | |
410 | * | |
411 | * Flush every events below timestamp 7 | |
412 | * etc... | |
413 | */ | |
414 | static int process_finished_round(event_t *event __used, | |
415 | struct perf_session *session, | |
416 | struct perf_event_ops *ops) | |
417 | { | |
418 | flush_sample_queue(session, ops); | |
419 | session->ordered_samples.next_flush = session->ordered_samples.max_timestamp; | |
420 | ||
421 | return 0; | |
422 | } | |
423 | ||
c61e52ee FW |
424 | static void __queue_sample_end(struct sample_queue *new, struct list_head *head) |
425 | { | |
426 | struct sample_queue *iter; | |
427 | ||
428 | list_for_each_entry_reverse(iter, head, list) { | |
429 | if (iter->timestamp < new->timestamp) { | |
430 | list_add(&new->list, &iter->list); | |
431 | return; | |
432 | } | |
433 | } | |
434 | ||
435 | list_add(&new->list, head); | |
436 | } | |
437 | ||
438 | static void __queue_sample_before(struct sample_queue *new, | |
439 | struct sample_queue *iter, | |
440 | struct list_head *head) | |
441 | { | |
442 | list_for_each_entry_continue_reverse(iter, head, list) { | |
443 | if (iter->timestamp < new->timestamp) { | |
444 | list_add(&new->list, &iter->list); | |
445 | return; | |
446 | } | |
447 | } | |
448 | ||
449 | list_add(&new->list, head); | |
450 | } | |
451 | ||
452 | static void __queue_sample_after(struct sample_queue *new, | |
453 | struct sample_queue *iter, | |
454 | struct list_head *head) | |
455 | { | |
456 | list_for_each_entry_continue(iter, head, list) { | |
457 | if (iter->timestamp > new->timestamp) { | |
458 | list_add_tail(&new->list, &iter->list); | |
459 | return; | |
460 | } | |
461 | } | |
462 | list_add_tail(&new->list, head); | |
463 | } | |
464 | ||
465 | /* The queue is ordered by time */ | |
466 | static void __queue_sample_event(struct sample_queue *new, | |
467 | struct perf_session *s) | |
468 | { | |
469 | struct sample_queue *last_inserted = s->ordered_samples.last_inserted; | |
470 | struct list_head *head = &s->ordered_samples.samples_head; | |
471 | ||
472 | ||
473 | if (!last_inserted) { | |
474 | __queue_sample_end(new, head); | |
475 | return; | |
476 | } | |
477 | ||
478 | /* | |
479 | * Most of the time the current event has a timestamp | |
480 | * very close to the last event inserted, unless we just switched | |
481 | * to another event buffer. Having a sorting based on a list and | |
482 | * on the last inserted event that is close to the current one is | |
483 | * probably more efficient than an rbtree based sorting. | |
484 | */ | |
485 | if (last_inserted->timestamp >= new->timestamp) | |
486 | __queue_sample_before(new, last_inserted, head); | |
487 | else | |
488 | __queue_sample_after(new, last_inserted, head); | |
489 | } | |
490 | ||
491 | static int queue_sample_event(event_t *event, struct sample_data *data, | |
d6b17beb | 492 | struct perf_session *s) |
c61e52ee FW |
493 | { |
494 | u64 timestamp = data->time; | |
495 | struct sample_queue *new; | |
c61e52ee FW |
496 | |
497 | ||
c61e52ee FW |
498 | if (timestamp < s->ordered_samples.last_flush) { |
499 | printf("Warning: Timestamp below last timeslice flush\n"); | |
500 | return -EINVAL; | |
501 | } | |
502 | ||
503 | new = malloc(sizeof(*new)); | |
504 | if (!new) | |
505 | return -ENOMEM; | |
506 | ||
507 | new->timestamp = timestamp; | |
508 | ||
509 | new->event = malloc(event->header.size); | |
510 | if (!new->event) { | |
511 | free(new); | |
512 | return -ENOMEM; | |
513 | } | |
514 | ||
515 | memcpy(new->event, event, event->header.size); | |
516 | ||
517 | __queue_sample_event(new, s); | |
518 | s->ordered_samples.last_inserted = new; | |
519 | ||
d6b17beb FW |
520 | if (new->timestamp > s->ordered_samples.max_timestamp) |
521 | s->ordered_samples.max_timestamp = new->timestamp; | |
c61e52ee FW |
522 | |
523 | return 0; | |
524 | } | |
525 | ||
526 | static int perf_session__process_sample(event_t *event, struct perf_session *s, | |
527 | struct perf_event_ops *ops) | |
528 | { | |
529 | struct sample_data data; | |
530 | ||
531 | if (!ops->ordered_samples) | |
532 | return ops->sample(event, s); | |
533 | ||
534 | bzero(&data, sizeof(struct sample_data)); | |
535 | event__parse_sample(event, s->sample_type, &data); | |
536 | ||
d6b17beb | 537 | queue_sample_event(event, &data, s); |
c61e52ee FW |
538 | |
539 | return 0; | |
540 | } | |
541 | ||
06aae590 ACM |
542 | static int perf_session__process_event(struct perf_session *self, |
543 | event_t *event, | |
544 | struct perf_event_ops *ops, | |
ba21594c | 545 | u64 offset, u64 head) |
06aae590 ACM |
546 | { |
547 | trace_event(event); | |
548 | ||
8dc58101 | 549 | if (event->header.type < PERF_RECORD_HEADER_MAX) { |
ba21594c | 550 | dump_printf("%#Lx [%#x]: PERF_RECORD_%s", |
0d755034 | 551 | offset + head, event->header.size, |
06aae590 | 552 | event__name[event->header.type]); |
cee75ac7 | 553 | hists__inc_nr_events(&self->hists, event->header.type); |
06aae590 ACM |
554 | } |
555 | ||
ba21594c ACM |
556 | if (self->header.needs_swap && event__swap_ops[event->header.type]) |
557 | event__swap_ops[event->header.type](event); | |
558 | ||
06aae590 ACM |
559 | switch (event->header.type) { |
560 | case PERF_RECORD_SAMPLE: | |
c61e52ee | 561 | return perf_session__process_sample(event, self, ops); |
06aae590 | 562 | case PERF_RECORD_MMAP: |
55aa640f | 563 | return ops->mmap(event, self); |
06aae590 | 564 | case PERF_RECORD_COMM: |
55aa640f | 565 | return ops->comm(event, self); |
06aae590 | 566 | case PERF_RECORD_FORK: |
55aa640f | 567 | return ops->fork(event, self); |
06aae590 | 568 | case PERF_RECORD_EXIT: |
55aa640f | 569 | return ops->exit(event, self); |
06aae590 | 570 | case PERF_RECORD_LOST: |
55aa640f | 571 | return ops->lost(event, self); |
06aae590 | 572 | case PERF_RECORD_READ: |
55aa640f | 573 | return ops->read(event, self); |
06aae590 | 574 | case PERF_RECORD_THROTTLE: |
55aa640f | 575 | return ops->throttle(event, self); |
06aae590 | 576 | case PERF_RECORD_UNTHROTTLE: |
55aa640f | 577 | return ops->unthrottle(event, self); |
2c46dbb5 TZ |
578 | case PERF_RECORD_HEADER_ATTR: |
579 | return ops->attr(event, self); | |
cd19a035 TZ |
580 | case PERF_RECORD_HEADER_EVENT_TYPE: |
581 | return ops->event_type(event, self); | |
9215545e TZ |
582 | case PERF_RECORD_HEADER_TRACING_DATA: |
583 | /* setup for reading amidst mmap */ | |
584 | lseek(self->fd, offset + head, SEEK_SET); | |
585 | return ops->tracing_data(event, self); | |
c7929e47 TZ |
586 | case PERF_RECORD_HEADER_BUILD_ID: |
587 | return ops->build_id(event, self); | |
d6b17beb FW |
588 | case PERF_RECORD_FINISHED_ROUND: |
589 | return ops->finished_round(event, self, ops); | |
06aae590 | 590 | default: |
c8446b9b | 591 | ++self->hists.stats.nr_unknown_events; |
06aae590 ACM |
592 | return -1; |
593 | } | |
594 | } | |
595 | ||
ba21594c ACM |
596 | void perf_event_header__bswap(struct perf_event_header *self) |
597 | { | |
598 | self->type = bswap_32(self->type); | |
599 | self->misc = bswap_16(self->misc); | |
600 | self->size = bswap_16(self->size); | |
601 | } | |
602 | ||
06aae590 ACM |
603 | static struct thread *perf_session__register_idle_thread(struct perf_session *self) |
604 | { | |
605 | struct thread *thread = perf_session__findnew(self, 0); | |
606 | ||
607 | if (thread == NULL || thread__set_comm(thread, "swapper")) { | |
608 | pr_err("problem inserting idle task.\n"); | |
609 | thread = NULL; | |
610 | } | |
611 | ||
612 | return thread; | |
613 | } | |
614 | ||
8dc58101 TZ |
615 | int do_read(int fd, void *buf, size_t size) |
616 | { | |
617 | void *buf_start = buf; | |
618 | ||
619 | while (size) { | |
620 | int ret = read(fd, buf, size); | |
621 | ||
622 | if (ret <= 0) | |
623 | return ret; | |
624 | ||
625 | size -= ret; | |
626 | buf += ret; | |
627 | } | |
628 | ||
629 | return buf - buf_start; | |
630 | } | |
631 | ||
632 | #define session_done() (*(volatile int *)(&session_done)) | |
633 | volatile int session_done; | |
634 | ||
635 | static int __perf_session__process_pipe_events(struct perf_session *self, | |
636 | struct perf_event_ops *ops) | |
637 | { | |
638 | event_t event; | |
639 | uint32_t size; | |
640 | int skip = 0; | |
641 | u64 head; | |
642 | int err; | |
643 | void *p; | |
644 | ||
645 | perf_event_ops__fill_defaults(ops); | |
646 | ||
647 | head = 0; | |
648 | more: | |
649 | err = do_read(self->fd, &event, sizeof(struct perf_event_header)); | |
650 | if (err <= 0) { | |
651 | if (err == 0) | |
652 | goto done; | |
653 | ||
654 | pr_err("failed to read event header\n"); | |
655 | goto out_err; | |
656 | } | |
657 | ||
658 | if (self->header.needs_swap) | |
659 | perf_event_header__bswap(&event.header); | |
660 | ||
661 | size = event.header.size; | |
662 | if (size == 0) | |
663 | size = 8; | |
664 | ||
665 | p = &event; | |
666 | p += sizeof(struct perf_event_header); | |
667 | ||
794e43b5 TZ |
668 | if (size - sizeof(struct perf_event_header)) { |
669 | err = do_read(self->fd, p, | |
670 | size - sizeof(struct perf_event_header)); | |
671 | if (err <= 0) { | |
672 | if (err == 0) { | |
673 | pr_err("unexpected end of event stream\n"); | |
674 | goto done; | |
675 | } | |
8dc58101 | 676 | |
794e43b5 TZ |
677 | pr_err("failed to read event data\n"); |
678 | goto out_err; | |
679 | } | |
8dc58101 TZ |
680 | } |
681 | ||
682 | if (size == 0 || | |
683 | (skip = perf_session__process_event(self, &event, ops, | |
684 | 0, head)) < 0) { | |
685 | dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n", | |
686 | head, event.header.size, event.header.type); | |
687 | /* | |
688 | * assume we lost track of the stream, check alignment, and | |
689 | * increment a single u64 in the hope to catch on again 'soon'. | |
690 | */ | |
691 | if (unlikely(head & 7)) | |
692 | head &= ~7ULL; | |
693 | ||
694 | size = 8; | |
695 | } | |
696 | ||
697 | head += size; | |
698 | ||
699 | dump_printf("\n%#Lx [%#x]: event: %d\n", | |
700 | head, event.header.size, event.header.type); | |
701 | ||
702 | if (skip > 0) | |
703 | head += skip; | |
704 | ||
705 | if (!session_done()) | |
706 | goto more; | |
707 | done: | |
708 | err = 0; | |
709 | out_err: | |
710 | return err; | |
711 | } | |
712 | ||
6122e4e4 ACM |
713 | int __perf_session__process_events(struct perf_session *self, |
714 | u64 data_offset, u64 data_size, | |
715 | u64 file_size, struct perf_event_ops *ops) | |
06aae590 | 716 | { |
ba21594c ACM |
717 | int err, mmap_prot, mmap_flags; |
718 | u64 head, shift; | |
719 | u64 offset = 0; | |
06aae590 ACM |
720 | size_t page_size; |
721 | event_t *event; | |
722 | uint32_t size; | |
723 | char *buf; | |
5f4d3f88 ACM |
724 | struct ui_progress *progress = ui_progress__new("Processing events...", |
725 | self->size); | |
726 | if (progress == NULL) | |
727 | return -1; | |
06aae590 | 728 | |
06aae590 ACM |
729 | perf_event_ops__fill_defaults(ops); |
730 | ||
1b75962e | 731 | page_size = sysconf(_SC_PAGESIZE); |
06aae590 | 732 | |
6122e4e4 | 733 | head = data_offset; |
06aae590 ACM |
734 | shift = page_size * (head / page_size); |
735 | offset += shift; | |
736 | head -= shift; | |
737 | ||
ba21594c ACM |
738 | mmap_prot = PROT_READ; |
739 | mmap_flags = MAP_SHARED; | |
740 | ||
741 | if (self->header.needs_swap) { | |
742 | mmap_prot |= PROT_WRITE; | |
743 | mmap_flags = MAP_PRIVATE; | |
744 | } | |
06aae590 | 745 | remap: |
ba21594c ACM |
746 | buf = mmap(NULL, page_size * self->mmap_window, mmap_prot, |
747 | mmap_flags, self->fd, offset); | |
06aae590 ACM |
748 | if (buf == MAP_FAILED) { |
749 | pr_err("failed to mmap file\n"); | |
750 | err = -errno; | |
751 | goto out_err; | |
752 | } | |
753 | ||
754 | more: | |
755 | event = (event_t *)(buf + head); | |
5f4d3f88 | 756 | ui_progress__update(progress, offset); |
06aae590 | 757 | |
ba21594c ACM |
758 | if (self->header.needs_swap) |
759 | perf_event_header__bswap(&event->header); | |
06aae590 ACM |
760 | size = event->header.size; |
761 | if (size == 0) | |
762 | size = 8; | |
763 | ||
764 | if (head + event->header.size >= page_size * self->mmap_window) { | |
765 | int munmap_ret; | |
766 | ||
767 | shift = page_size * (head / page_size); | |
768 | ||
769 | munmap_ret = munmap(buf, page_size * self->mmap_window); | |
770 | assert(munmap_ret == 0); | |
771 | ||
772 | offset += shift; | |
773 | head -= shift; | |
774 | goto remap; | |
775 | } | |
776 | ||
777 | size = event->header.size; | |
778 | ||
ba21594c | 779 | dump_printf("\n%#Lx [%#x]: event: %d\n", |
0d755034 | 780 | offset + head, event->header.size, event->header.type); |
06aae590 ACM |
781 | |
782 | if (size == 0 || | |
783 | perf_session__process_event(self, event, ops, offset, head) < 0) { | |
ba21594c | 784 | dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n", |
0d755034 | 785 | offset + head, event->header.size, |
06aae590 ACM |
786 | event->header.type); |
787 | /* | |
788 | * assume we lost track of the stream, check alignment, and | |
789 | * increment a single u64 in the hope to catch on again 'soon'. | |
790 | */ | |
791 | if (unlikely(head & 7)) | |
792 | head &= ~7ULL; | |
793 | ||
794 | size = 8; | |
795 | } | |
796 | ||
797 | head += size; | |
798 | ||
6122e4e4 | 799 | if (offset + head >= data_offset + data_size) |
06aae590 ACM |
800 | goto done; |
801 | ||
6122e4e4 | 802 | if (offset + head < file_size) |
06aae590 ACM |
803 | goto more; |
804 | done: | |
805 | err = 0; | |
c61e52ee | 806 | /* do the final flush for ordered samples */ |
d6b17beb | 807 | self->ordered_samples.next_flush = ULLONG_MAX; |
c61e52ee | 808 | flush_sample_queue(self, ops); |
06aae590 | 809 | out_err: |
5f4d3f88 | 810 | ui_progress__delete(progress); |
06aae590 ACM |
811 | return err; |
812 | } | |
27295592 | 813 | |
6122e4e4 ACM |
814 | int perf_session__process_events(struct perf_session *self, |
815 | struct perf_event_ops *ops) | |
816 | { | |
817 | int err; | |
818 | ||
819 | if (perf_session__register_idle_thread(self) == NULL) | |
820 | return -ENOMEM; | |
821 | ||
822 | if (!symbol_conf.full_paths) { | |
823 | char bf[PATH_MAX]; | |
824 | ||
825 | if (getcwd(bf, sizeof(bf)) == NULL) { | |
826 | err = -errno; | |
827 | out_getcwd_err: | |
828 | pr_err("failed to get the current directory\n"); | |
829 | goto out_err; | |
830 | } | |
831 | self->cwd = strdup(bf); | |
832 | if (self->cwd == NULL) { | |
833 | err = -ENOMEM; | |
834 | goto out_getcwd_err; | |
835 | } | |
836 | self->cwdlen = strlen(self->cwd); | |
837 | } | |
838 | ||
8dc58101 TZ |
839 | if (!self->fd_pipe) |
840 | err = __perf_session__process_events(self, | |
841 | self->header.data_offset, | |
842 | self->header.data_size, | |
843 | self->size, ops); | |
844 | else | |
845 | err = __perf_session__process_pipe_events(self, ops); | |
6122e4e4 ACM |
846 | out_err: |
847 | return err; | |
848 | } | |
849 | ||
d549c769 | 850 | bool perf_session__has_traces(struct perf_session *self, const char *msg) |
27295592 ACM |
851 | { |
852 | if (!(self->sample_type & PERF_SAMPLE_RAW)) { | |
d549c769 ACM |
853 | pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); |
854 | return false; | |
27295592 ACM |
855 | } |
856 | ||
d549c769 | 857 | return true; |
27295592 | 858 | } |
56b03f3c | 859 | |
a1645ce1 | 860 | int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps, |
56b03f3c ACM |
861 | const char *symbol_name, |
862 | u64 addr) | |
863 | { | |
864 | char *bracket; | |
9de89fe7 | 865 | enum map_type i; |
a1645ce1 ZY |
866 | struct ref_reloc_sym *ref; |
867 | ||
868 | ref = zalloc(sizeof(struct ref_reloc_sym)); | |
869 | if (ref == NULL) | |
870 | return -ENOMEM; | |
56b03f3c | 871 | |
a1645ce1 ZY |
872 | ref->name = strdup(symbol_name); |
873 | if (ref->name == NULL) { | |
874 | free(ref); | |
56b03f3c | 875 | return -ENOMEM; |
a1645ce1 | 876 | } |
56b03f3c | 877 | |
a1645ce1 | 878 | bracket = strchr(ref->name, ']'); |
56b03f3c ACM |
879 | if (bracket) |
880 | *bracket = '\0'; | |
881 | ||
a1645ce1 | 882 | ref->addr = addr; |
9de89fe7 ACM |
883 | |
884 | for (i = 0; i < MAP__NR_TYPES; ++i) { | |
a1645ce1 ZY |
885 | struct kmap *kmap = map__kmap(maps[i]); |
886 | kmap->ref_reloc_sym = ref; | |
9de89fe7 ACM |
887 | } |
888 | ||
56b03f3c ACM |
889 | return 0; |
890 | } | |
1f626bc3 ACM |
891 | |
892 | size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) | |
893 | { | |
894 | return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) + | |
895 | __dsos__fprintf(&self->host_machine.user_dsos, fp) + | |
896 | machines__fprintf_dsos(&self->machines, fp); | |
897 | } |