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Commit | Line | Data |
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b8f46c5a XG |
1 | #define _FILE_OFFSET_BITS 64 |
2 | ||
94c744b6 ACM |
3 | #include <linux/kernel.h> |
4 | ||
ba21594c | 5 | #include <byteswap.h> |
94c744b6 ACM |
6 | #include <unistd.h> |
7 | #include <sys/types.h> | |
a41794cd | 8 | #include <sys/mman.h> |
94c744b6 ACM |
9 | |
10 | #include "session.h" | |
a328626b | 11 | #include "sort.h" |
94c744b6 ACM |
12 | #include "util.h" |
13 | ||
14 | static int perf_session__open(struct perf_session *self, bool force) | |
15 | { | |
16 | struct stat input_stat; | |
17 | ||
8dc58101 TZ |
18 | if (!strcmp(self->filename, "-")) { |
19 | self->fd_pipe = true; | |
20 | self->fd = STDIN_FILENO; | |
21 | ||
22 | if (perf_header__read(self, self->fd) < 0) | |
23 | pr_err("incompatible file format"); | |
24 | ||
25 | return 0; | |
26 | } | |
27 | ||
f887f301 | 28 | self->fd = open(self->filename, O_RDONLY); |
94c744b6 | 29 | if (self->fd < 0) { |
0f2c3de2 AI |
30 | int err = errno; |
31 | ||
32 | pr_err("failed to open %s: %s", self->filename, strerror(err)); | |
33 | if (err == ENOENT && !strcmp(self->filename, "perf.data")) | |
94c744b6 ACM |
34 | pr_err(" (try 'perf record' first)"); |
35 | pr_err("\n"); | |
36 | return -errno; | |
37 | } | |
38 | ||
39 | if (fstat(self->fd, &input_stat) < 0) | |
40 | goto out_close; | |
41 | ||
42 | if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) { | |
43 | pr_err("file %s not owned by current user or root\n", | |
44 | self->filename); | |
45 | goto out_close; | |
46 | } | |
47 | ||
48 | if (!input_stat.st_size) { | |
49 | pr_info("zero-sized file (%s), nothing to do!\n", | |
50 | self->filename); | |
51 | goto out_close; | |
52 | } | |
53 | ||
8dc58101 | 54 | if (perf_header__read(self, self->fd) < 0) { |
94c744b6 ACM |
55 | pr_err("incompatible file format"); |
56 | goto out_close; | |
57 | } | |
58 | ||
59 | self->size = input_stat.st_size; | |
60 | return 0; | |
61 | ||
62 | out_close: | |
63 | close(self->fd); | |
64 | self->fd = -1; | |
65 | return -1; | |
66 | } | |
67 | ||
8dc58101 TZ |
68 | void perf_session__update_sample_type(struct perf_session *self) |
69 | { | |
70 | self->sample_type = perf_header__sample_type(&self->header); | |
71 | } | |
72 | ||
a1645ce1 ZY |
73 | int perf_session__create_kernel_maps(struct perf_session *self) |
74 | { | |
d118f8ba | 75 | int ret = machine__create_kernel_maps(&self->host_machine); |
a1645ce1 | 76 | |
a1645ce1 | 77 | if (ret >= 0) |
d118f8ba | 78 | ret = machines__create_guest_kernel_maps(&self->machines); |
a1645ce1 ZY |
79 | return ret; |
80 | } | |
81 | ||
454c407e | 82 | struct perf_session *perf_session__new(const char *filename, int mode, bool force, bool repipe) |
94c744b6 | 83 | { |
b3165f41 | 84 | size_t len = filename ? strlen(filename) + 1 : 0; |
94c744b6 ACM |
85 | struct perf_session *self = zalloc(sizeof(*self) + len); |
86 | ||
87 | if (self == NULL) | |
88 | goto out; | |
89 | ||
90 | if (perf_header__init(&self->header) < 0) | |
4aa65636 | 91 | goto out_free; |
94c744b6 ACM |
92 | |
93 | memcpy(self->filename, filename, len); | |
b3165f41 | 94 | self->threads = RB_ROOT; |
720a3aeb | 95 | INIT_LIST_HEAD(&self->dead_threads); |
1c02c4d2 | 96 | self->hists_tree = RB_ROOT; |
b3165f41 | 97 | self->last_match = NULL; |
ec913369 ACM |
98 | self->mmap_window = 32; |
99 | self->cwd = NULL; | |
100 | self->cwdlen = 0; | |
23346f21 | 101 | self->machines = RB_ROOT; |
454c407e | 102 | self->repipe = repipe; |
c61e52ee | 103 | INIT_LIST_HEAD(&self->ordered_samples.samples_head); |
1f626bc3 | 104 | machine__init(&self->host_machine, "", HOST_KERNEL_ID); |
94c744b6 | 105 | |
64abebf7 ACM |
106 | if (mode == O_RDONLY) { |
107 | if (perf_session__open(self, force) < 0) | |
108 | goto out_delete; | |
109 | } else if (mode == O_WRONLY) { | |
110 | /* | |
111 | * In O_RDONLY mode this will be performed when reading the | |
112 | * kernel MMAP event, in event__process_mmap(). | |
113 | */ | |
114 | if (perf_session__create_kernel_maps(self) < 0) | |
115 | goto out_delete; | |
116 | } | |
d549c769 | 117 | |
8dc58101 | 118 | perf_session__update_sample_type(self); |
94c744b6 ACM |
119 | out: |
120 | return self; | |
4aa65636 | 121 | out_free: |
94c744b6 ACM |
122 | free(self); |
123 | return NULL; | |
4aa65636 ACM |
124 | out_delete: |
125 | perf_session__delete(self); | |
126 | return NULL; | |
94c744b6 ACM |
127 | } |
128 | ||
129 | void perf_session__delete(struct perf_session *self) | |
130 | { | |
131 | perf_header__exit(&self->header); | |
132 | close(self->fd); | |
ec913369 | 133 | free(self->cwd); |
94c744b6 ACM |
134 | free(self); |
135 | } | |
a328626b | 136 | |
720a3aeb ACM |
137 | void perf_session__remove_thread(struct perf_session *self, struct thread *th) |
138 | { | |
139 | rb_erase(&th->rb_node, &self->threads); | |
140 | /* | |
141 | * We may have references to this thread, for instance in some hist_entry | |
142 | * instances, so just move them to a separate list. | |
143 | */ | |
144 | list_add_tail(&th->node, &self->dead_threads); | |
145 | } | |
146 | ||
a328626b ACM |
147 | static bool symbol__match_parent_regex(struct symbol *sym) |
148 | { | |
149 | if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0)) | |
150 | return 1; | |
151 | ||
152 | return 0; | |
153 | } | |
154 | ||
b3c9ac08 ACM |
155 | struct map_symbol *perf_session__resolve_callchain(struct perf_session *self, |
156 | struct thread *thread, | |
157 | struct ip_callchain *chain, | |
158 | struct symbol **parent) | |
a328626b ACM |
159 | { |
160 | u8 cpumode = PERF_RECORD_MISC_USER; | |
a328626b | 161 | unsigned int i; |
ad5b217b | 162 | struct map_symbol *syms = calloc(chain->nr, sizeof(*syms)); |
a328626b | 163 | |
ad5b217b ACM |
164 | if (!syms) |
165 | return NULL; | |
a328626b ACM |
166 | |
167 | for (i = 0; i < chain->nr; i++) { | |
168 | u64 ip = chain->ips[i]; | |
169 | struct addr_location al; | |
170 | ||
171 | if (ip >= PERF_CONTEXT_MAX) { | |
172 | switch (ip) { | |
173 | case PERF_CONTEXT_HV: | |
174 | cpumode = PERF_RECORD_MISC_HYPERVISOR; break; | |
175 | case PERF_CONTEXT_KERNEL: | |
176 | cpumode = PERF_RECORD_MISC_KERNEL; break; | |
177 | case PERF_CONTEXT_USER: | |
178 | cpumode = PERF_RECORD_MISC_USER; break; | |
179 | default: | |
180 | break; | |
181 | } | |
182 | continue; | |
183 | } | |
184 | ||
a1645ce1 | 185 | al.filtered = false; |
a328626b | 186 | thread__find_addr_location(thread, self, cpumode, |
a1645ce1 | 187 | MAP__FUNCTION, thread->pid, ip, &al, NULL); |
a328626b ACM |
188 | if (al.sym != NULL) { |
189 | if (sort__has_parent && !*parent && | |
190 | symbol__match_parent_regex(al.sym)) | |
191 | *parent = al.sym; | |
d599db3f | 192 | if (!symbol_conf.use_callchain) |
a328626b | 193 | break; |
b3c9ac08 ACM |
194 | syms[i].map = al.map; |
195 | syms[i].sym = al.sym; | |
a328626b ACM |
196 | } |
197 | } | |
198 | ||
199 | return syms; | |
200 | } | |
06aae590 ACM |
201 | |
202 | static int process_event_stub(event_t *event __used, | |
203 | struct perf_session *session __used) | |
204 | { | |
205 | dump_printf(": unhandled!\n"); | |
206 | return 0; | |
207 | } | |
208 | ||
d6b17beb FW |
209 | static int process_finished_round_stub(event_t *event __used, |
210 | struct perf_session *session __used, | |
211 | struct perf_event_ops *ops __used) | |
212 | { | |
213 | dump_printf(": unhandled!\n"); | |
214 | return 0; | |
215 | } | |
216 | ||
217 | static int process_finished_round(event_t *event, | |
218 | struct perf_session *session, | |
219 | struct perf_event_ops *ops); | |
220 | ||
06aae590 ACM |
221 | static void perf_event_ops__fill_defaults(struct perf_event_ops *handler) |
222 | { | |
55aa640f ACM |
223 | if (handler->sample == NULL) |
224 | handler->sample = process_event_stub; | |
225 | if (handler->mmap == NULL) | |
226 | handler->mmap = process_event_stub; | |
227 | if (handler->comm == NULL) | |
228 | handler->comm = process_event_stub; | |
229 | if (handler->fork == NULL) | |
230 | handler->fork = process_event_stub; | |
231 | if (handler->exit == NULL) | |
232 | handler->exit = process_event_stub; | |
233 | if (handler->lost == NULL) | |
234 | handler->lost = process_event_stub; | |
235 | if (handler->read == NULL) | |
236 | handler->read = process_event_stub; | |
237 | if (handler->throttle == NULL) | |
238 | handler->throttle = process_event_stub; | |
239 | if (handler->unthrottle == NULL) | |
240 | handler->unthrottle = process_event_stub; | |
2c46dbb5 TZ |
241 | if (handler->attr == NULL) |
242 | handler->attr = process_event_stub; | |
cd19a035 TZ |
243 | if (handler->event_type == NULL) |
244 | handler->event_type = process_event_stub; | |
9215545e TZ |
245 | if (handler->tracing_data == NULL) |
246 | handler->tracing_data = process_event_stub; | |
c7929e47 TZ |
247 | if (handler->build_id == NULL) |
248 | handler->build_id = process_event_stub; | |
d6b17beb FW |
249 | if (handler->finished_round == NULL) { |
250 | if (handler->ordered_samples) | |
251 | handler->finished_round = process_finished_round; | |
252 | else | |
253 | handler->finished_round = process_finished_round_stub; | |
254 | } | |
06aae590 ACM |
255 | } |
256 | ||
ba21594c ACM |
257 | void mem_bswap_64(void *src, int byte_size) |
258 | { | |
259 | u64 *m = src; | |
260 | ||
261 | while (byte_size > 0) { | |
262 | *m = bswap_64(*m); | |
263 | byte_size -= sizeof(u64); | |
264 | ++m; | |
265 | } | |
266 | } | |
267 | ||
268 | static void event__all64_swap(event_t *self) | |
269 | { | |
270 | struct perf_event_header *hdr = &self->header; | |
271 | mem_bswap_64(hdr + 1, self->header.size - sizeof(*hdr)); | |
272 | } | |
273 | ||
274 | static void event__comm_swap(event_t *self) | |
275 | { | |
276 | self->comm.pid = bswap_32(self->comm.pid); | |
277 | self->comm.tid = bswap_32(self->comm.tid); | |
278 | } | |
279 | ||
280 | static void event__mmap_swap(event_t *self) | |
281 | { | |
282 | self->mmap.pid = bswap_32(self->mmap.pid); | |
283 | self->mmap.tid = bswap_32(self->mmap.tid); | |
284 | self->mmap.start = bswap_64(self->mmap.start); | |
285 | self->mmap.len = bswap_64(self->mmap.len); | |
286 | self->mmap.pgoff = bswap_64(self->mmap.pgoff); | |
287 | } | |
288 | ||
289 | static void event__task_swap(event_t *self) | |
290 | { | |
291 | self->fork.pid = bswap_32(self->fork.pid); | |
292 | self->fork.tid = bswap_32(self->fork.tid); | |
293 | self->fork.ppid = bswap_32(self->fork.ppid); | |
294 | self->fork.ptid = bswap_32(self->fork.ptid); | |
295 | self->fork.time = bswap_64(self->fork.time); | |
296 | } | |
297 | ||
298 | static void event__read_swap(event_t *self) | |
299 | { | |
300 | self->read.pid = bswap_32(self->read.pid); | |
301 | self->read.tid = bswap_32(self->read.tid); | |
302 | self->read.value = bswap_64(self->read.value); | |
303 | self->read.time_enabled = bswap_64(self->read.time_enabled); | |
304 | self->read.time_running = bswap_64(self->read.time_running); | |
305 | self->read.id = bswap_64(self->read.id); | |
306 | } | |
307 | ||
2c46dbb5 TZ |
308 | static void event__attr_swap(event_t *self) |
309 | { | |
310 | size_t size; | |
311 | ||
312 | self->attr.attr.type = bswap_32(self->attr.attr.type); | |
313 | self->attr.attr.size = bswap_32(self->attr.attr.size); | |
314 | self->attr.attr.config = bswap_64(self->attr.attr.config); | |
315 | self->attr.attr.sample_period = bswap_64(self->attr.attr.sample_period); | |
316 | self->attr.attr.sample_type = bswap_64(self->attr.attr.sample_type); | |
317 | self->attr.attr.read_format = bswap_64(self->attr.attr.read_format); | |
318 | self->attr.attr.wakeup_events = bswap_32(self->attr.attr.wakeup_events); | |
319 | self->attr.attr.bp_type = bswap_32(self->attr.attr.bp_type); | |
320 | self->attr.attr.bp_addr = bswap_64(self->attr.attr.bp_addr); | |
321 | self->attr.attr.bp_len = bswap_64(self->attr.attr.bp_len); | |
322 | ||
323 | size = self->header.size; | |
324 | size -= (void *)&self->attr.id - (void *)self; | |
325 | mem_bswap_64(self->attr.id, size); | |
326 | } | |
327 | ||
cd19a035 TZ |
328 | static void event__event_type_swap(event_t *self) |
329 | { | |
330 | self->event_type.event_type.event_id = | |
331 | bswap_64(self->event_type.event_type.event_id); | |
332 | } | |
333 | ||
9215545e TZ |
334 | static void event__tracing_data_swap(event_t *self) |
335 | { | |
336 | self->tracing_data.size = bswap_32(self->tracing_data.size); | |
337 | } | |
338 | ||
ba21594c ACM |
339 | typedef void (*event__swap_op)(event_t *self); |
340 | ||
341 | static event__swap_op event__swap_ops[] = { | |
342 | [PERF_RECORD_MMAP] = event__mmap_swap, | |
343 | [PERF_RECORD_COMM] = event__comm_swap, | |
344 | [PERF_RECORD_FORK] = event__task_swap, | |
345 | [PERF_RECORD_EXIT] = event__task_swap, | |
346 | [PERF_RECORD_LOST] = event__all64_swap, | |
347 | [PERF_RECORD_READ] = event__read_swap, | |
348 | [PERF_RECORD_SAMPLE] = event__all64_swap, | |
2c46dbb5 | 349 | [PERF_RECORD_HEADER_ATTR] = event__attr_swap, |
cd19a035 | 350 | [PERF_RECORD_HEADER_EVENT_TYPE] = event__event_type_swap, |
9215545e | 351 | [PERF_RECORD_HEADER_TRACING_DATA] = event__tracing_data_swap, |
c7929e47 | 352 | [PERF_RECORD_HEADER_BUILD_ID] = NULL, |
8dc58101 | 353 | [PERF_RECORD_HEADER_MAX] = NULL, |
ba21594c ACM |
354 | }; |
355 | ||
c61e52ee FW |
356 | struct sample_queue { |
357 | u64 timestamp; | |
358 | struct sample_event *event; | |
359 | struct list_head list; | |
360 | }; | |
361 | ||
c61e52ee FW |
362 | static void flush_sample_queue(struct perf_session *s, |
363 | struct perf_event_ops *ops) | |
364 | { | |
365 | struct list_head *head = &s->ordered_samples.samples_head; | |
d6b17beb | 366 | u64 limit = s->ordered_samples.next_flush; |
c61e52ee FW |
367 | struct sample_queue *tmp, *iter; |
368 | ||
d6b17beb | 369 | if (!ops->ordered_samples || !limit) |
c61e52ee FW |
370 | return; |
371 | ||
372 | list_for_each_entry_safe(iter, tmp, head, list) { | |
373 | if (iter->timestamp > limit) | |
374 | return; | |
375 | ||
376 | if (iter == s->ordered_samples.last_inserted) | |
377 | s->ordered_samples.last_inserted = NULL; | |
378 | ||
379 | ops->sample((event_t *)iter->event, s); | |
380 | ||
381 | s->ordered_samples.last_flush = iter->timestamp; | |
382 | list_del(&iter->list); | |
383 | free(iter->event); | |
384 | free(iter); | |
385 | } | |
386 | } | |
387 | ||
d6b17beb FW |
388 | /* |
389 | * When perf record finishes a pass on every buffers, it records this pseudo | |
390 | * event. | |
391 | * We record the max timestamp t found in the pass n. | |
392 | * Assuming these timestamps are monotonic across cpus, we know that if | |
393 | * a buffer still has events with timestamps below t, they will be all | |
394 | * available and then read in the pass n + 1. | |
395 | * Hence when we start to read the pass n + 2, we can safely flush every | |
396 | * events with timestamps below t. | |
397 | * | |
398 | * ============ PASS n ================= | |
399 | * CPU 0 | CPU 1 | |
400 | * | | |
401 | * cnt1 timestamps | cnt2 timestamps | |
402 | * 1 | 2 | |
403 | * 2 | 3 | |
404 | * - | 4 <--- max recorded | |
405 | * | |
406 | * ============ PASS n + 1 ============== | |
407 | * CPU 0 | CPU 1 | |
408 | * | | |
409 | * cnt1 timestamps | cnt2 timestamps | |
410 | * 3 | 5 | |
411 | * 4 | 6 | |
412 | * 5 | 7 <---- max recorded | |
413 | * | |
414 | * Flush every events below timestamp 4 | |
415 | * | |
416 | * ============ PASS n + 2 ============== | |
417 | * CPU 0 | CPU 1 | |
418 | * | | |
419 | * cnt1 timestamps | cnt2 timestamps | |
420 | * 6 | 8 | |
421 | * 7 | 9 | |
422 | * - | 10 | |
423 | * | |
424 | * Flush every events below timestamp 7 | |
425 | * etc... | |
426 | */ | |
427 | static int process_finished_round(event_t *event __used, | |
428 | struct perf_session *session, | |
429 | struct perf_event_ops *ops) | |
430 | { | |
431 | flush_sample_queue(session, ops); | |
432 | session->ordered_samples.next_flush = session->ordered_samples.max_timestamp; | |
433 | ||
434 | return 0; | |
435 | } | |
436 | ||
c61e52ee FW |
437 | static void __queue_sample_end(struct sample_queue *new, struct list_head *head) |
438 | { | |
439 | struct sample_queue *iter; | |
440 | ||
441 | list_for_each_entry_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_before(struct sample_queue *new, | |
452 | struct sample_queue *iter, | |
453 | struct list_head *head) | |
454 | { | |
455 | list_for_each_entry_continue_reverse(iter, head, list) { | |
456 | if (iter->timestamp < new->timestamp) { | |
457 | list_add(&new->list, &iter->list); | |
458 | return; | |
459 | } | |
460 | } | |
461 | ||
462 | list_add(&new->list, head); | |
463 | } | |
464 | ||
465 | static void __queue_sample_after(struct sample_queue *new, | |
466 | struct sample_queue *iter, | |
467 | struct list_head *head) | |
468 | { | |
469 | list_for_each_entry_continue(iter, head, list) { | |
470 | if (iter->timestamp > new->timestamp) { | |
471 | list_add_tail(&new->list, &iter->list); | |
472 | return; | |
473 | } | |
474 | } | |
475 | list_add_tail(&new->list, head); | |
476 | } | |
477 | ||
478 | /* The queue is ordered by time */ | |
479 | static void __queue_sample_event(struct sample_queue *new, | |
480 | struct perf_session *s) | |
481 | { | |
482 | struct sample_queue *last_inserted = s->ordered_samples.last_inserted; | |
483 | struct list_head *head = &s->ordered_samples.samples_head; | |
484 | ||
485 | ||
486 | if (!last_inserted) { | |
487 | __queue_sample_end(new, head); | |
488 | return; | |
489 | } | |
490 | ||
491 | /* | |
492 | * Most of the time the current event has a timestamp | |
493 | * very close to the last event inserted, unless we just switched | |
494 | * to another event buffer. Having a sorting based on a list and | |
495 | * on the last inserted event that is close to the current one is | |
496 | * probably more efficient than an rbtree based sorting. | |
497 | */ | |
498 | if (last_inserted->timestamp >= new->timestamp) | |
499 | __queue_sample_before(new, last_inserted, head); | |
500 | else | |
501 | __queue_sample_after(new, last_inserted, head); | |
502 | } | |
503 | ||
504 | static int queue_sample_event(event_t *event, struct sample_data *data, | |
d6b17beb | 505 | struct perf_session *s) |
c61e52ee FW |
506 | { |
507 | u64 timestamp = data->time; | |
508 | struct sample_queue *new; | |
c61e52ee FW |
509 | |
510 | ||
c61e52ee FW |
511 | if (timestamp < s->ordered_samples.last_flush) { |
512 | printf("Warning: Timestamp below last timeslice flush\n"); | |
513 | return -EINVAL; | |
514 | } | |
515 | ||
516 | new = malloc(sizeof(*new)); | |
517 | if (!new) | |
518 | return -ENOMEM; | |
519 | ||
520 | new->timestamp = timestamp; | |
521 | ||
522 | new->event = malloc(event->header.size); | |
523 | if (!new->event) { | |
524 | free(new); | |
525 | return -ENOMEM; | |
526 | } | |
527 | ||
528 | memcpy(new->event, event, event->header.size); | |
529 | ||
530 | __queue_sample_event(new, s); | |
531 | s->ordered_samples.last_inserted = new; | |
532 | ||
d6b17beb FW |
533 | if (new->timestamp > s->ordered_samples.max_timestamp) |
534 | s->ordered_samples.max_timestamp = new->timestamp; | |
c61e52ee FW |
535 | |
536 | return 0; | |
537 | } | |
538 | ||
539 | static int perf_session__process_sample(event_t *event, struct perf_session *s, | |
540 | struct perf_event_ops *ops) | |
541 | { | |
542 | struct sample_data data; | |
543 | ||
544 | if (!ops->ordered_samples) | |
545 | return ops->sample(event, s); | |
546 | ||
547 | bzero(&data, sizeof(struct sample_data)); | |
548 | event__parse_sample(event, s->sample_type, &data); | |
549 | ||
d6b17beb | 550 | queue_sample_event(event, &data, s); |
c61e52ee FW |
551 | |
552 | return 0; | |
553 | } | |
554 | ||
06aae590 ACM |
555 | static int perf_session__process_event(struct perf_session *self, |
556 | event_t *event, | |
557 | struct perf_event_ops *ops, | |
ba21594c | 558 | u64 offset, u64 head) |
06aae590 ACM |
559 | { |
560 | trace_event(event); | |
561 | ||
8dc58101 | 562 | if (event->header.type < PERF_RECORD_HEADER_MAX) { |
ba21594c | 563 | dump_printf("%#Lx [%#x]: PERF_RECORD_%s", |
0d755034 | 564 | offset + head, event->header.size, |
06aae590 | 565 | event__name[event->header.type]); |
cee75ac7 | 566 | hists__inc_nr_events(&self->hists, event->header.type); |
06aae590 ACM |
567 | } |
568 | ||
ba21594c ACM |
569 | if (self->header.needs_swap && event__swap_ops[event->header.type]) |
570 | event__swap_ops[event->header.type](event); | |
571 | ||
06aae590 ACM |
572 | switch (event->header.type) { |
573 | case PERF_RECORD_SAMPLE: | |
c61e52ee | 574 | return perf_session__process_sample(event, self, ops); |
06aae590 | 575 | case PERF_RECORD_MMAP: |
55aa640f | 576 | return ops->mmap(event, self); |
06aae590 | 577 | case PERF_RECORD_COMM: |
55aa640f | 578 | return ops->comm(event, self); |
06aae590 | 579 | case PERF_RECORD_FORK: |
55aa640f | 580 | return ops->fork(event, self); |
06aae590 | 581 | case PERF_RECORD_EXIT: |
55aa640f | 582 | return ops->exit(event, self); |
06aae590 | 583 | case PERF_RECORD_LOST: |
55aa640f | 584 | return ops->lost(event, self); |
06aae590 | 585 | case PERF_RECORD_READ: |
55aa640f | 586 | return ops->read(event, self); |
06aae590 | 587 | case PERF_RECORD_THROTTLE: |
55aa640f | 588 | return ops->throttle(event, self); |
06aae590 | 589 | case PERF_RECORD_UNTHROTTLE: |
55aa640f | 590 | return ops->unthrottle(event, self); |
2c46dbb5 TZ |
591 | case PERF_RECORD_HEADER_ATTR: |
592 | return ops->attr(event, self); | |
cd19a035 TZ |
593 | case PERF_RECORD_HEADER_EVENT_TYPE: |
594 | return ops->event_type(event, self); | |
9215545e TZ |
595 | case PERF_RECORD_HEADER_TRACING_DATA: |
596 | /* setup for reading amidst mmap */ | |
597 | lseek(self->fd, offset + head, SEEK_SET); | |
598 | return ops->tracing_data(event, self); | |
c7929e47 TZ |
599 | case PERF_RECORD_HEADER_BUILD_ID: |
600 | return ops->build_id(event, self); | |
d6b17beb FW |
601 | case PERF_RECORD_FINISHED_ROUND: |
602 | return ops->finished_round(event, self, ops); | |
06aae590 | 603 | default: |
c8446b9b | 604 | ++self->hists.stats.nr_unknown_events; |
06aae590 ACM |
605 | return -1; |
606 | } | |
607 | } | |
608 | ||
ba21594c ACM |
609 | void perf_event_header__bswap(struct perf_event_header *self) |
610 | { | |
611 | self->type = bswap_32(self->type); | |
612 | self->misc = bswap_16(self->misc); | |
613 | self->size = bswap_16(self->size); | |
614 | } | |
615 | ||
06aae590 ACM |
616 | static struct thread *perf_session__register_idle_thread(struct perf_session *self) |
617 | { | |
618 | struct thread *thread = perf_session__findnew(self, 0); | |
619 | ||
620 | if (thread == NULL || thread__set_comm(thread, "swapper")) { | |
621 | pr_err("problem inserting idle task.\n"); | |
622 | thread = NULL; | |
623 | } | |
624 | ||
625 | return thread; | |
626 | } | |
627 | ||
8dc58101 TZ |
628 | int do_read(int fd, void *buf, size_t size) |
629 | { | |
630 | void *buf_start = buf; | |
631 | ||
632 | while (size) { | |
633 | int ret = read(fd, buf, size); | |
634 | ||
635 | if (ret <= 0) | |
636 | return ret; | |
637 | ||
638 | size -= ret; | |
639 | buf += ret; | |
640 | } | |
641 | ||
642 | return buf - buf_start; | |
643 | } | |
644 | ||
645 | #define session_done() (*(volatile int *)(&session_done)) | |
646 | volatile int session_done; | |
647 | ||
648 | static int __perf_session__process_pipe_events(struct perf_session *self, | |
649 | struct perf_event_ops *ops) | |
650 | { | |
651 | event_t event; | |
652 | uint32_t size; | |
653 | int skip = 0; | |
654 | u64 head; | |
655 | int err; | |
656 | void *p; | |
657 | ||
658 | perf_event_ops__fill_defaults(ops); | |
659 | ||
660 | head = 0; | |
661 | more: | |
662 | err = do_read(self->fd, &event, sizeof(struct perf_event_header)); | |
663 | if (err <= 0) { | |
664 | if (err == 0) | |
665 | goto done; | |
666 | ||
667 | pr_err("failed to read event header\n"); | |
668 | goto out_err; | |
669 | } | |
670 | ||
671 | if (self->header.needs_swap) | |
672 | perf_event_header__bswap(&event.header); | |
673 | ||
674 | size = event.header.size; | |
675 | if (size == 0) | |
676 | size = 8; | |
677 | ||
678 | p = &event; | |
679 | p += sizeof(struct perf_event_header); | |
680 | ||
794e43b5 TZ |
681 | if (size - sizeof(struct perf_event_header)) { |
682 | err = do_read(self->fd, p, | |
683 | size - sizeof(struct perf_event_header)); | |
684 | if (err <= 0) { | |
685 | if (err == 0) { | |
686 | pr_err("unexpected end of event stream\n"); | |
687 | goto done; | |
688 | } | |
8dc58101 | 689 | |
794e43b5 TZ |
690 | pr_err("failed to read event data\n"); |
691 | goto out_err; | |
692 | } | |
8dc58101 TZ |
693 | } |
694 | ||
695 | if (size == 0 || | |
696 | (skip = perf_session__process_event(self, &event, ops, | |
697 | 0, head)) < 0) { | |
698 | dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n", | |
699 | head, event.header.size, event.header.type); | |
700 | /* | |
701 | * assume we lost track of the stream, check alignment, and | |
702 | * increment a single u64 in the hope to catch on again 'soon'. | |
703 | */ | |
704 | if (unlikely(head & 7)) | |
705 | head &= ~7ULL; | |
706 | ||
707 | size = 8; | |
708 | } | |
709 | ||
710 | head += size; | |
711 | ||
712 | dump_printf("\n%#Lx [%#x]: event: %d\n", | |
713 | head, event.header.size, event.header.type); | |
714 | ||
715 | if (skip > 0) | |
716 | head += skip; | |
717 | ||
718 | if (!session_done()) | |
719 | goto more; | |
720 | done: | |
721 | err = 0; | |
722 | out_err: | |
723 | return err; | |
724 | } | |
725 | ||
6122e4e4 ACM |
726 | int __perf_session__process_events(struct perf_session *self, |
727 | u64 data_offset, u64 data_size, | |
728 | u64 file_size, struct perf_event_ops *ops) | |
06aae590 | 729 | { |
ba21594c ACM |
730 | int err, mmap_prot, mmap_flags; |
731 | u64 head, shift; | |
732 | u64 offset = 0; | |
06aae590 ACM |
733 | size_t page_size; |
734 | event_t *event; | |
735 | uint32_t size; | |
736 | char *buf; | |
5f4d3f88 ACM |
737 | struct ui_progress *progress = ui_progress__new("Processing events...", |
738 | self->size); | |
739 | if (progress == NULL) | |
740 | return -1; | |
06aae590 | 741 | |
06aae590 ACM |
742 | perf_event_ops__fill_defaults(ops); |
743 | ||
1b75962e | 744 | page_size = sysconf(_SC_PAGESIZE); |
06aae590 | 745 | |
6122e4e4 | 746 | head = data_offset; |
06aae590 ACM |
747 | shift = page_size * (head / page_size); |
748 | offset += shift; | |
749 | head -= shift; | |
750 | ||
ba21594c ACM |
751 | mmap_prot = PROT_READ; |
752 | mmap_flags = MAP_SHARED; | |
753 | ||
754 | if (self->header.needs_swap) { | |
755 | mmap_prot |= PROT_WRITE; | |
756 | mmap_flags = MAP_PRIVATE; | |
757 | } | |
06aae590 | 758 | remap: |
ba21594c ACM |
759 | buf = mmap(NULL, page_size * self->mmap_window, mmap_prot, |
760 | mmap_flags, self->fd, offset); | |
06aae590 ACM |
761 | if (buf == MAP_FAILED) { |
762 | pr_err("failed to mmap file\n"); | |
763 | err = -errno; | |
764 | goto out_err; | |
765 | } | |
766 | ||
767 | more: | |
768 | event = (event_t *)(buf + head); | |
5f4d3f88 | 769 | ui_progress__update(progress, offset); |
06aae590 | 770 | |
ba21594c ACM |
771 | if (self->header.needs_swap) |
772 | perf_event_header__bswap(&event->header); | |
06aae590 ACM |
773 | size = event->header.size; |
774 | if (size == 0) | |
775 | size = 8; | |
776 | ||
777 | if (head + event->header.size >= page_size * self->mmap_window) { | |
778 | int munmap_ret; | |
779 | ||
780 | shift = page_size * (head / page_size); | |
781 | ||
782 | munmap_ret = munmap(buf, page_size * self->mmap_window); | |
783 | assert(munmap_ret == 0); | |
784 | ||
785 | offset += shift; | |
786 | head -= shift; | |
787 | goto remap; | |
788 | } | |
789 | ||
790 | size = event->header.size; | |
791 | ||
ba21594c | 792 | dump_printf("\n%#Lx [%#x]: event: %d\n", |
0d755034 | 793 | offset + head, event->header.size, event->header.type); |
06aae590 ACM |
794 | |
795 | if (size == 0 || | |
796 | perf_session__process_event(self, event, ops, offset, head) < 0) { | |
ba21594c | 797 | dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n", |
0d755034 | 798 | offset + head, event->header.size, |
06aae590 ACM |
799 | event->header.type); |
800 | /* | |
801 | * assume we lost track of the stream, check alignment, and | |
802 | * increment a single u64 in the hope to catch on again 'soon'. | |
803 | */ | |
804 | if (unlikely(head & 7)) | |
805 | head &= ~7ULL; | |
806 | ||
807 | size = 8; | |
808 | } | |
809 | ||
810 | head += size; | |
811 | ||
6122e4e4 | 812 | if (offset + head >= data_offset + data_size) |
06aae590 ACM |
813 | goto done; |
814 | ||
6122e4e4 | 815 | if (offset + head < file_size) |
06aae590 ACM |
816 | goto more; |
817 | done: | |
818 | err = 0; | |
c61e52ee | 819 | /* do the final flush for ordered samples */ |
d6b17beb | 820 | self->ordered_samples.next_flush = ULLONG_MAX; |
c61e52ee | 821 | flush_sample_queue(self, ops); |
06aae590 | 822 | out_err: |
5f4d3f88 | 823 | ui_progress__delete(progress); |
06aae590 ACM |
824 | return err; |
825 | } | |
27295592 | 826 | |
6122e4e4 ACM |
827 | int perf_session__process_events(struct perf_session *self, |
828 | struct perf_event_ops *ops) | |
829 | { | |
830 | int err; | |
831 | ||
832 | if (perf_session__register_idle_thread(self) == NULL) | |
833 | return -ENOMEM; | |
834 | ||
835 | if (!symbol_conf.full_paths) { | |
836 | char bf[PATH_MAX]; | |
837 | ||
838 | if (getcwd(bf, sizeof(bf)) == NULL) { | |
839 | err = -errno; | |
840 | out_getcwd_err: | |
841 | pr_err("failed to get the current directory\n"); | |
842 | goto out_err; | |
843 | } | |
844 | self->cwd = strdup(bf); | |
845 | if (self->cwd == NULL) { | |
846 | err = -ENOMEM; | |
847 | goto out_getcwd_err; | |
848 | } | |
849 | self->cwdlen = strlen(self->cwd); | |
850 | } | |
851 | ||
8dc58101 TZ |
852 | if (!self->fd_pipe) |
853 | err = __perf_session__process_events(self, | |
854 | self->header.data_offset, | |
855 | self->header.data_size, | |
856 | self->size, ops); | |
857 | else | |
858 | err = __perf_session__process_pipe_events(self, ops); | |
6122e4e4 ACM |
859 | out_err: |
860 | return err; | |
861 | } | |
862 | ||
d549c769 | 863 | bool perf_session__has_traces(struct perf_session *self, const char *msg) |
27295592 ACM |
864 | { |
865 | if (!(self->sample_type & PERF_SAMPLE_RAW)) { | |
d549c769 ACM |
866 | pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); |
867 | return false; | |
27295592 ACM |
868 | } |
869 | ||
d549c769 | 870 | return true; |
27295592 | 871 | } |
56b03f3c | 872 | |
a1645ce1 | 873 | int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps, |
56b03f3c ACM |
874 | const char *symbol_name, |
875 | u64 addr) | |
876 | { | |
877 | char *bracket; | |
9de89fe7 | 878 | enum map_type i; |
a1645ce1 ZY |
879 | struct ref_reloc_sym *ref; |
880 | ||
881 | ref = zalloc(sizeof(struct ref_reloc_sym)); | |
882 | if (ref == NULL) | |
883 | return -ENOMEM; | |
56b03f3c | 884 | |
a1645ce1 ZY |
885 | ref->name = strdup(symbol_name); |
886 | if (ref->name == NULL) { | |
887 | free(ref); | |
56b03f3c | 888 | return -ENOMEM; |
a1645ce1 | 889 | } |
56b03f3c | 890 | |
a1645ce1 | 891 | bracket = strchr(ref->name, ']'); |
56b03f3c ACM |
892 | if (bracket) |
893 | *bracket = '\0'; | |
894 | ||
a1645ce1 | 895 | ref->addr = addr; |
9de89fe7 ACM |
896 | |
897 | for (i = 0; i < MAP__NR_TYPES; ++i) { | |
a1645ce1 ZY |
898 | struct kmap *kmap = map__kmap(maps[i]); |
899 | kmap->ref_reloc_sym = ref; | |
9de89fe7 ACM |
900 | } |
901 | ||
56b03f3c ACM |
902 | return 0; |
903 | } | |
1f626bc3 ACM |
904 | |
905 | size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) | |
906 | { | |
907 | return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) + | |
908 | __dsos__fprintf(&self->host_machine.user_dsos, fp) + | |
909 | machines__fprintf_dsos(&self->machines, fp); | |
910 | } | |
f869097e ACM |
911 | |
912 | size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp, | |
913 | bool with_hits) | |
914 | { | |
915 | size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits); | |
916 | return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits); | |
917 | } |