1 | // SPDX-License-Identifier: GPL-2.0 |
2 | #include <errno.h> |
3 | #include <signal.h> |
4 | #include <inttypes.h> |
5 | #include <linux/err.h> |
6 | #include <linux/kernel.h> |
7 | #include <linux/zalloc.h> |
8 | #include <api/fs/fs.h> |
9 | |
10 | #include <byteswap.h> |
11 | #include <unistd.h> |
12 | #include <sys/types.h> |
13 | #include <sys/mman.h> |
14 | #include <perf/cpumap.h> |
15 | |
16 | #include "map_symbol.h" |
17 | #include "branch.h" |
18 | #include "debug.h" |
19 | #include "env.h" |
20 | #include "evlist.h" |
21 | #include "evsel.h" |
22 | #include "memswap.h" |
23 | #include "map.h" |
24 | #include "symbol.h" |
25 | #include "session.h" |
26 | #include "tool.h" |
27 | #include "perf_regs.h" |
28 | #include "asm/bug.h" |
29 | #include "auxtrace.h" |
30 | #include "thread.h" |
31 | #include "thread-stack.h" |
32 | #include "sample-raw.h" |
33 | #include "stat.h" |
34 | #include "tsc.h" |
35 | #include "ui/progress.h" |
36 | #include "util.h" |
37 | #include "arch/common.h" |
38 | #include "units.h" |
39 | #include <internal/lib.h> |
40 | |
41 | #ifdef HAVE_ZSTD_SUPPORT |
42 | static int perf_session__process_compressed_event(struct perf_session *session, |
43 | union perf_event *event, u64 file_offset, |
44 | const char *file_path) |
45 | { |
46 | void *src; |
47 | size_t decomp_size, src_size; |
48 | u64 decomp_last_rem = 0; |
49 | size_t mmap_len, decomp_len = session->header.env.comp_mmap_len; |
50 | struct decomp *decomp, *decomp_last = session->active_decomp->decomp_last; |
51 | |
52 | if (decomp_last) { |
53 | decomp_last_rem = decomp_last->size - decomp_last->head; |
54 | decomp_len += decomp_last_rem; |
55 | } |
56 | |
57 | mmap_len = sizeof(struct decomp) + decomp_len; |
58 | decomp = mmap(NULL, mmap_len, PROT_READ|PROT_WRITE, |
59 | MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); |
60 | if (decomp == MAP_FAILED) { |
61 | pr_err("Couldn't allocate memory for decompression\n" ); |
62 | return -1; |
63 | } |
64 | |
65 | decomp->file_pos = file_offset; |
66 | decomp->file_path = file_path; |
67 | decomp->mmap_len = mmap_len; |
68 | decomp->head = 0; |
69 | |
70 | if (decomp_last_rem) { |
71 | memcpy(decomp->data, &(decomp_last->data[decomp_last->head]), decomp_last_rem); |
72 | decomp->size = decomp_last_rem; |
73 | } |
74 | |
75 | src = (void *)event + sizeof(struct perf_record_compressed); |
76 | src_size = event->pack.header.size - sizeof(struct perf_record_compressed); |
77 | |
78 | decomp_size = zstd_decompress_stream(session->active_decomp->zstd_decomp, src, src_size, |
79 | &(decomp->data[decomp_last_rem]), decomp_len - decomp_last_rem); |
80 | if (!decomp_size) { |
81 | munmap(decomp, mmap_len); |
82 | pr_err("Couldn't decompress data\n" ); |
83 | return -1; |
84 | } |
85 | |
86 | decomp->size += decomp_size; |
87 | |
88 | if (session->active_decomp->decomp == NULL) |
89 | session->active_decomp->decomp = decomp; |
90 | else |
91 | session->active_decomp->decomp_last->next = decomp; |
92 | |
93 | session->active_decomp->decomp_last = decomp; |
94 | |
95 | pr_debug("decomp (B): %zd to %zd\n" , src_size, decomp_size); |
96 | |
97 | return 0; |
98 | } |
99 | #else /* !HAVE_ZSTD_SUPPORT */ |
100 | #define perf_session__process_compressed_event perf_session__process_compressed_event_stub |
101 | #endif |
102 | |
103 | static int perf_session__deliver_event(struct perf_session *session, |
104 | union perf_event *event, |
105 | struct perf_tool *tool, |
106 | u64 file_offset, |
107 | const char *file_path); |
108 | |
109 | static int perf_session__open(struct perf_session *session, int repipe_fd) |
110 | { |
111 | struct perf_data *data = session->data; |
112 | |
113 | if (perf_session__read_header(session, repipe_fd) < 0) { |
114 | pr_err("incompatible file format (rerun with -v to learn more)\n" ); |
115 | return -1; |
116 | } |
117 | |
118 | if (perf_header__has_feat(header: &session->header, feat: HEADER_AUXTRACE)) { |
119 | /* Auxiliary events may reference exited threads, hold onto dead ones. */ |
120 | symbol_conf.keep_exited_threads = true; |
121 | } |
122 | |
123 | if (perf_data__is_pipe(data)) |
124 | return 0; |
125 | |
126 | if (perf_header__has_feat(header: &session->header, feat: HEADER_STAT)) |
127 | return 0; |
128 | |
129 | if (!evlist__valid_sample_type(evlist: session->evlist)) { |
130 | pr_err("non matching sample_type\n" ); |
131 | return -1; |
132 | } |
133 | |
134 | if (!evlist__valid_sample_id_all(evlist: session->evlist)) { |
135 | pr_err("non matching sample_id_all\n" ); |
136 | return -1; |
137 | } |
138 | |
139 | if (!evlist__valid_read_format(evlist: session->evlist)) { |
140 | pr_err("non matching read_format\n" ); |
141 | return -1; |
142 | } |
143 | |
144 | return 0; |
145 | } |
146 | |
147 | void perf_session__set_id_hdr_size(struct perf_session *session) |
148 | { |
149 | u16 id_hdr_size = evlist__id_hdr_size(evlist: session->evlist); |
150 | |
151 | machines__set_id_hdr_size(machines: &session->machines, id_hdr_size); |
152 | } |
153 | |
154 | int perf_session__create_kernel_maps(struct perf_session *session) |
155 | { |
156 | int ret = machine__create_kernel_maps(machine: &session->machines.host); |
157 | |
158 | if (ret >= 0) |
159 | ret = machines__create_guest_kernel_maps(machines: &session->machines); |
160 | return ret; |
161 | } |
162 | |
163 | static void perf_session__destroy_kernel_maps(struct perf_session *session) |
164 | { |
165 | machines__destroy_kernel_maps(machines: &session->machines); |
166 | } |
167 | |
168 | static bool perf_session__has_comm_exec(struct perf_session *session) |
169 | { |
170 | struct evsel *evsel; |
171 | |
172 | evlist__for_each_entry(session->evlist, evsel) { |
173 | if (evsel->core.attr.comm_exec) |
174 | return true; |
175 | } |
176 | |
177 | return false; |
178 | } |
179 | |
180 | static void perf_session__set_comm_exec(struct perf_session *session) |
181 | { |
182 | bool comm_exec = perf_session__has_comm_exec(session); |
183 | |
184 | machines__set_comm_exec(machines: &session->machines, comm_exec); |
185 | } |
186 | |
187 | static int ordered_events__deliver_event(struct ordered_events *oe, |
188 | struct ordered_event *event) |
189 | { |
190 | struct perf_session *session = container_of(oe, struct perf_session, |
191 | ordered_events); |
192 | |
193 | return perf_session__deliver_event(session, event: event->event, |
194 | tool: session->tool, file_offset: event->file_offset, |
195 | file_path: event->file_path); |
196 | } |
197 | |
198 | struct perf_session *__perf_session__new(struct perf_data *data, |
199 | bool repipe, int repipe_fd, |
200 | struct perf_tool *tool) |
201 | { |
202 | int ret = -ENOMEM; |
203 | struct perf_session *session = zalloc(sizeof(*session)); |
204 | |
205 | if (!session) |
206 | goto out; |
207 | |
208 | session->repipe = repipe; |
209 | session->tool = tool; |
210 | session->decomp_data.zstd_decomp = &session->zstd_data; |
211 | session->active_decomp = &session->decomp_data; |
212 | INIT_LIST_HEAD(list: &session->auxtrace_index); |
213 | machines__init(machines: &session->machines); |
214 | ordered_events__init(oe: &session->ordered_events, |
215 | deliver: ordered_events__deliver_event, NULL); |
216 | |
217 | perf_env__init(env: &session->header.env); |
218 | if (data) { |
219 | ret = perf_data__open(data); |
220 | if (ret < 0) |
221 | goto out_delete; |
222 | |
223 | session->data = data; |
224 | |
225 | if (perf_data__is_read(data)) { |
226 | ret = perf_session__open(session, repipe_fd); |
227 | if (ret < 0) |
228 | goto out_delete; |
229 | |
230 | /* |
231 | * set session attributes that are present in perf.data |
232 | * but not in pipe-mode. |
233 | */ |
234 | if (!data->is_pipe) { |
235 | perf_session__set_id_hdr_size(session); |
236 | perf_session__set_comm_exec(session); |
237 | } |
238 | |
239 | evlist__init_trace_event_sample_raw(evlist: session->evlist); |
240 | |
241 | /* Open the directory data. */ |
242 | if (data->is_dir) { |
243 | ret = perf_data__open_dir(data); |
244 | if (ret) |
245 | goto out_delete; |
246 | } |
247 | |
248 | if (!symbol_conf.kallsyms_name && |
249 | !symbol_conf.vmlinux_name) |
250 | symbol_conf.kallsyms_name = perf_data__kallsyms_name(data); |
251 | } |
252 | } else { |
253 | session->machines.host.env = &perf_env; |
254 | } |
255 | |
256 | session->machines.host.single_address_space = |
257 | perf_env__single_address_space(session->machines.host.env); |
258 | |
259 | if (!data || perf_data__is_write(data)) { |
260 | /* |
261 | * In O_RDONLY mode this will be performed when reading the |
262 | * kernel MMAP event, in perf_event__process_mmap(). |
263 | */ |
264 | if (perf_session__create_kernel_maps(session) < 0) |
265 | pr_warning("Cannot read kernel map\n" ); |
266 | } |
267 | |
268 | /* |
269 | * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is |
270 | * processed, so evlist__sample_id_all is not meaningful here. |
271 | */ |
272 | if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps && |
273 | tool->ordered_events && !evlist__sample_id_all(evlist: session->evlist)) { |
274 | dump_printf(fmt: "WARNING: No sample_id_all support, falling back to unordered processing\n" ); |
275 | tool->ordered_events = false; |
276 | } |
277 | |
278 | return session; |
279 | |
280 | out_delete: |
281 | perf_session__delete(session); |
282 | out: |
283 | return ERR_PTR(error: ret); |
284 | } |
285 | |
286 | static void perf_decomp__release_events(struct decomp *next) |
287 | { |
288 | struct decomp *decomp; |
289 | size_t mmap_len; |
290 | |
291 | do { |
292 | decomp = next; |
293 | if (decomp == NULL) |
294 | break; |
295 | next = decomp->next; |
296 | mmap_len = decomp->mmap_len; |
297 | munmap(decomp, mmap_len); |
298 | } while (1); |
299 | } |
300 | |
301 | void perf_session__delete(struct perf_session *session) |
302 | { |
303 | if (session == NULL) |
304 | return; |
305 | auxtrace__free(session); |
306 | auxtrace_index__free(head: &session->auxtrace_index); |
307 | perf_session__destroy_kernel_maps(session); |
308 | perf_decomp__release_events(next: session->decomp_data.decomp); |
309 | perf_env__exit(env: &session->header.env); |
310 | machines__exit(machines: &session->machines); |
311 | if (session->data) { |
312 | if (perf_data__is_read(data: session->data)) |
313 | evlist__delete(evlist: session->evlist); |
314 | perf_data__close(data: session->data); |
315 | } |
316 | #ifdef HAVE_LIBTRACEEVENT |
317 | trace_event__cleanup(&session->tevent); |
318 | #endif |
319 | free(session); |
320 | } |
321 | |
322 | static int process_event_synth_tracing_data_stub(struct perf_session *session |
323 | __maybe_unused, |
324 | union perf_event *event |
325 | __maybe_unused) |
326 | { |
327 | dump_printf(fmt: ": unhandled!\n" ); |
328 | return 0; |
329 | } |
330 | |
331 | static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused, |
332 | union perf_event *event __maybe_unused, |
333 | struct evlist **pevlist |
334 | __maybe_unused) |
335 | { |
336 | dump_printf(fmt: ": unhandled!\n" ); |
337 | return 0; |
338 | } |
339 | |
340 | static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused, |
341 | union perf_event *event __maybe_unused, |
342 | struct evlist **pevlist |
343 | __maybe_unused) |
344 | { |
345 | if (dump_trace) |
346 | perf_event__fprintf_event_update(event, stdout); |
347 | |
348 | dump_printf(fmt: ": unhandled!\n" ); |
349 | return 0; |
350 | } |
351 | |
352 | static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, |
353 | union perf_event *event __maybe_unused, |
354 | struct perf_sample *sample __maybe_unused, |
355 | struct evsel *evsel __maybe_unused, |
356 | struct machine *machine __maybe_unused) |
357 | { |
358 | dump_printf(fmt: ": unhandled!\n" ); |
359 | return 0; |
360 | } |
361 | |
362 | static int process_event_stub(struct perf_tool *tool __maybe_unused, |
363 | union perf_event *event __maybe_unused, |
364 | struct perf_sample *sample __maybe_unused, |
365 | struct machine *machine __maybe_unused) |
366 | { |
367 | dump_printf(fmt: ": unhandled!\n" ); |
368 | return 0; |
369 | } |
370 | |
371 | static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, |
372 | union perf_event *event __maybe_unused, |
373 | struct ordered_events *oe __maybe_unused) |
374 | { |
375 | dump_printf(fmt: ": unhandled!\n" ); |
376 | return 0; |
377 | } |
378 | |
379 | static int skipn(int fd, off_t n) |
380 | { |
381 | char buf[4096]; |
382 | ssize_t ret; |
383 | |
384 | while (n > 0) { |
385 | ret = read(fd, buf, min(n, (off_t)sizeof(buf))); |
386 | if (ret <= 0) |
387 | return ret; |
388 | n -= ret; |
389 | } |
390 | |
391 | return 0; |
392 | } |
393 | |
394 | static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused, |
395 | union perf_event *event) |
396 | { |
397 | dump_printf(fmt: ": unhandled!\n" ); |
398 | if (perf_data__is_pipe(data: session->data)) |
399 | skipn(fd: perf_data__fd(data: session->data), n: event->auxtrace.size); |
400 | return event->auxtrace.size; |
401 | } |
402 | |
403 | static int process_event_op2_stub(struct perf_session *session __maybe_unused, |
404 | union perf_event *event __maybe_unused) |
405 | { |
406 | dump_printf(fmt: ": unhandled!\n" ); |
407 | return 0; |
408 | } |
409 | |
410 | |
411 | static |
412 | int process_event_thread_map_stub(struct perf_session *session __maybe_unused, |
413 | union perf_event *event __maybe_unused) |
414 | { |
415 | if (dump_trace) |
416 | perf_event__fprintf_thread_map(event, stdout); |
417 | |
418 | dump_printf(fmt: ": unhandled!\n" ); |
419 | return 0; |
420 | } |
421 | |
422 | static |
423 | int process_event_cpu_map_stub(struct perf_session *session __maybe_unused, |
424 | union perf_event *event __maybe_unused) |
425 | { |
426 | if (dump_trace) |
427 | perf_event__fprintf_cpu_map(event, stdout); |
428 | |
429 | dump_printf(fmt: ": unhandled!\n" ); |
430 | return 0; |
431 | } |
432 | |
433 | static |
434 | int process_event_stat_config_stub(struct perf_session *session __maybe_unused, |
435 | union perf_event *event __maybe_unused) |
436 | { |
437 | if (dump_trace) |
438 | perf_event__fprintf_stat_config(event, stdout); |
439 | |
440 | dump_printf(fmt: ": unhandled!\n" ); |
441 | return 0; |
442 | } |
443 | |
444 | static int process_stat_stub(struct perf_session *perf_session __maybe_unused, |
445 | union perf_event *event) |
446 | { |
447 | if (dump_trace) |
448 | perf_event__fprintf_stat(event, stdout); |
449 | |
450 | dump_printf(fmt: ": unhandled!\n" ); |
451 | return 0; |
452 | } |
453 | |
454 | static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused, |
455 | union perf_event *event) |
456 | { |
457 | if (dump_trace) |
458 | perf_event__fprintf_stat_round(event, stdout); |
459 | |
460 | dump_printf(fmt: ": unhandled!\n" ); |
461 | return 0; |
462 | } |
463 | |
464 | static int process_event_time_conv_stub(struct perf_session *perf_session __maybe_unused, |
465 | union perf_event *event) |
466 | { |
467 | if (dump_trace) |
468 | perf_event__fprintf_time_conv(event, stdout); |
469 | |
470 | dump_printf(fmt: ": unhandled!\n" ); |
471 | return 0; |
472 | } |
473 | |
474 | static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused, |
475 | union perf_event *event __maybe_unused, |
476 | u64 file_offset __maybe_unused, |
477 | const char *file_path __maybe_unused) |
478 | { |
479 | dump_printf(fmt: ": unhandled!\n" ); |
480 | return 0; |
481 | } |
482 | |
483 | void perf_tool__fill_defaults(struct perf_tool *tool) |
484 | { |
485 | if (tool->sample == NULL) |
486 | tool->sample = process_event_sample_stub; |
487 | if (tool->mmap == NULL) |
488 | tool->mmap = process_event_stub; |
489 | if (tool->mmap2 == NULL) |
490 | tool->mmap2 = process_event_stub; |
491 | if (tool->comm == NULL) |
492 | tool->comm = process_event_stub; |
493 | if (tool->namespaces == NULL) |
494 | tool->namespaces = process_event_stub; |
495 | if (tool->cgroup == NULL) |
496 | tool->cgroup = process_event_stub; |
497 | if (tool->fork == NULL) |
498 | tool->fork = process_event_stub; |
499 | if (tool->exit == NULL) |
500 | tool->exit = process_event_stub; |
501 | if (tool->lost == NULL) |
502 | tool->lost = perf_event__process_lost; |
503 | if (tool->lost_samples == NULL) |
504 | tool->lost_samples = perf_event__process_lost_samples; |
505 | if (tool->aux == NULL) |
506 | tool->aux = perf_event__process_aux; |
507 | if (tool->itrace_start == NULL) |
508 | tool->itrace_start = perf_event__process_itrace_start; |
509 | if (tool->context_switch == NULL) |
510 | tool->context_switch = perf_event__process_switch; |
511 | if (tool->ksymbol == NULL) |
512 | tool->ksymbol = perf_event__process_ksymbol; |
513 | if (tool->bpf == NULL) |
514 | tool->bpf = perf_event__process_bpf; |
515 | if (tool->text_poke == NULL) |
516 | tool->text_poke = perf_event__process_text_poke; |
517 | if (tool->aux_output_hw_id == NULL) |
518 | tool->aux_output_hw_id = perf_event__process_aux_output_hw_id; |
519 | if (tool->read == NULL) |
520 | tool->read = process_event_sample_stub; |
521 | if (tool->throttle == NULL) |
522 | tool->throttle = process_event_stub; |
523 | if (tool->unthrottle == NULL) |
524 | tool->unthrottle = process_event_stub; |
525 | if (tool->attr == NULL) |
526 | tool->attr = process_event_synth_attr_stub; |
527 | if (tool->event_update == NULL) |
528 | tool->event_update = process_event_synth_event_update_stub; |
529 | if (tool->tracing_data == NULL) |
530 | tool->tracing_data = process_event_synth_tracing_data_stub; |
531 | if (tool->build_id == NULL) |
532 | tool->build_id = process_event_op2_stub; |
533 | if (tool->finished_round == NULL) { |
534 | if (tool->ordered_events) |
535 | tool->finished_round = perf_event__process_finished_round; |
536 | else |
537 | tool->finished_round = process_finished_round_stub; |
538 | } |
539 | if (tool->id_index == NULL) |
540 | tool->id_index = process_event_op2_stub; |
541 | if (tool->auxtrace_info == NULL) |
542 | tool->auxtrace_info = process_event_op2_stub; |
543 | if (tool->auxtrace == NULL) |
544 | tool->auxtrace = process_event_auxtrace_stub; |
545 | if (tool->auxtrace_error == NULL) |
546 | tool->auxtrace_error = process_event_op2_stub; |
547 | if (tool->thread_map == NULL) |
548 | tool->thread_map = process_event_thread_map_stub; |
549 | if (tool->cpu_map == NULL) |
550 | tool->cpu_map = process_event_cpu_map_stub; |
551 | if (tool->stat_config == NULL) |
552 | tool->stat_config = process_event_stat_config_stub; |
553 | if (tool->stat == NULL) |
554 | tool->stat = process_stat_stub; |
555 | if (tool->stat_round == NULL) |
556 | tool->stat_round = process_stat_round_stub; |
557 | if (tool->time_conv == NULL) |
558 | tool->time_conv = process_event_time_conv_stub; |
559 | if (tool->feature == NULL) |
560 | tool->feature = process_event_op2_stub; |
561 | if (tool->compressed == NULL) |
562 | tool->compressed = perf_session__process_compressed_event; |
563 | if (tool->finished_init == NULL) |
564 | tool->finished_init = process_event_op2_stub; |
565 | } |
566 | |
567 | static void swap_sample_id_all(union perf_event *event, void *data) |
568 | { |
569 | void *end = (void *) event + event->header.size; |
570 | int size = end - data; |
571 | |
572 | BUG_ON(size % sizeof(u64)); |
573 | mem_bswap_64(src: data, byte_size: size); |
574 | } |
575 | |
576 | static void perf_event__all64_swap(union perf_event *event, |
577 | bool sample_id_all __maybe_unused) |
578 | { |
579 | struct perf_event_header *hdr = &event->header; |
580 | mem_bswap_64(src: hdr + 1, byte_size: event->header.size - sizeof(*hdr)); |
581 | } |
582 | |
583 | static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) |
584 | { |
585 | event->comm.pid = bswap_32(event->comm.pid); |
586 | event->comm.tid = bswap_32(event->comm.tid); |
587 | |
588 | if (sample_id_all) { |
589 | void *data = &event->comm.comm; |
590 | |
591 | data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); |
592 | swap_sample_id_all(event, data); |
593 | } |
594 | } |
595 | |
596 | static void perf_event__mmap_swap(union perf_event *event, |
597 | bool sample_id_all) |
598 | { |
599 | event->mmap.pid = bswap_32(event->mmap.pid); |
600 | event->mmap.tid = bswap_32(event->mmap.tid); |
601 | event->mmap.start = bswap_64(event->mmap.start); |
602 | event->mmap.len = bswap_64(event->mmap.len); |
603 | event->mmap.pgoff = bswap_64(event->mmap.pgoff); |
604 | |
605 | if (sample_id_all) { |
606 | void *data = &event->mmap.filename; |
607 | |
608 | data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); |
609 | swap_sample_id_all(event, data); |
610 | } |
611 | } |
612 | |
613 | static void perf_event__mmap2_swap(union perf_event *event, |
614 | bool sample_id_all) |
615 | { |
616 | event->mmap2.pid = bswap_32(event->mmap2.pid); |
617 | event->mmap2.tid = bswap_32(event->mmap2.tid); |
618 | event->mmap2.start = bswap_64(event->mmap2.start); |
619 | event->mmap2.len = bswap_64(event->mmap2.len); |
620 | event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); |
621 | |
622 | if (!(event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID)) { |
623 | event->mmap2.maj = bswap_32(event->mmap2.maj); |
624 | event->mmap2.min = bswap_32(event->mmap2.min); |
625 | event->mmap2.ino = bswap_64(event->mmap2.ino); |
626 | event->mmap2.ino_generation = bswap_64(event->mmap2.ino_generation); |
627 | } |
628 | |
629 | if (sample_id_all) { |
630 | void *data = &event->mmap2.filename; |
631 | |
632 | data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); |
633 | swap_sample_id_all(event, data); |
634 | } |
635 | } |
636 | static void perf_event__task_swap(union perf_event *event, bool sample_id_all) |
637 | { |
638 | event->fork.pid = bswap_32(event->fork.pid); |
639 | event->fork.tid = bswap_32(event->fork.tid); |
640 | event->fork.ppid = bswap_32(event->fork.ppid); |
641 | event->fork.ptid = bswap_32(event->fork.ptid); |
642 | event->fork.time = bswap_64(event->fork.time); |
643 | |
644 | if (sample_id_all) |
645 | swap_sample_id_all(event, data: &event->fork + 1); |
646 | } |
647 | |
648 | static void perf_event__read_swap(union perf_event *event, bool sample_id_all) |
649 | { |
650 | event->read.pid = bswap_32(event->read.pid); |
651 | event->read.tid = bswap_32(event->read.tid); |
652 | event->read.value = bswap_64(event->read.value); |
653 | event->read.time_enabled = bswap_64(event->read.time_enabled); |
654 | event->read.time_running = bswap_64(event->read.time_running); |
655 | event->read.id = bswap_64(event->read.id); |
656 | |
657 | if (sample_id_all) |
658 | swap_sample_id_all(event, data: &event->read + 1); |
659 | } |
660 | |
661 | static void perf_event__aux_swap(union perf_event *event, bool sample_id_all) |
662 | { |
663 | event->aux.aux_offset = bswap_64(event->aux.aux_offset); |
664 | event->aux.aux_size = bswap_64(event->aux.aux_size); |
665 | event->aux.flags = bswap_64(event->aux.flags); |
666 | |
667 | if (sample_id_all) |
668 | swap_sample_id_all(event, data: &event->aux + 1); |
669 | } |
670 | |
671 | static void perf_event__itrace_start_swap(union perf_event *event, |
672 | bool sample_id_all) |
673 | { |
674 | event->itrace_start.pid = bswap_32(event->itrace_start.pid); |
675 | event->itrace_start.tid = bswap_32(event->itrace_start.tid); |
676 | |
677 | if (sample_id_all) |
678 | swap_sample_id_all(event, data: &event->itrace_start + 1); |
679 | } |
680 | |
681 | static void perf_event__switch_swap(union perf_event *event, bool sample_id_all) |
682 | { |
683 | if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) { |
684 | event->context_switch.next_prev_pid = |
685 | bswap_32(event->context_switch.next_prev_pid); |
686 | event->context_switch.next_prev_tid = |
687 | bswap_32(event->context_switch.next_prev_tid); |
688 | } |
689 | |
690 | if (sample_id_all) |
691 | swap_sample_id_all(event, data: &event->context_switch + 1); |
692 | } |
693 | |
694 | static void perf_event__text_poke_swap(union perf_event *event, bool sample_id_all) |
695 | { |
696 | event->text_poke.addr = bswap_64(event->text_poke.addr); |
697 | event->text_poke.old_len = bswap_16(event->text_poke.old_len); |
698 | event->text_poke.new_len = bswap_16(event->text_poke.new_len); |
699 | |
700 | if (sample_id_all) { |
701 | size_t len = sizeof(event->text_poke.old_len) + |
702 | sizeof(event->text_poke.new_len) + |
703 | event->text_poke.old_len + |
704 | event->text_poke.new_len; |
705 | void *data = &event->text_poke.old_len; |
706 | |
707 | data += PERF_ALIGN(len, sizeof(u64)); |
708 | swap_sample_id_all(event, data); |
709 | } |
710 | } |
711 | |
712 | static void perf_event__throttle_swap(union perf_event *event, |
713 | bool sample_id_all) |
714 | { |
715 | event->throttle.time = bswap_64(event->throttle.time); |
716 | event->throttle.id = bswap_64(event->throttle.id); |
717 | event->throttle.stream_id = bswap_64(event->throttle.stream_id); |
718 | |
719 | if (sample_id_all) |
720 | swap_sample_id_all(event, data: &event->throttle + 1); |
721 | } |
722 | |
723 | static void perf_event__namespaces_swap(union perf_event *event, |
724 | bool sample_id_all) |
725 | { |
726 | u64 i; |
727 | |
728 | event->namespaces.pid = bswap_32(event->namespaces.pid); |
729 | event->namespaces.tid = bswap_32(event->namespaces.tid); |
730 | event->namespaces.nr_namespaces = bswap_64(event->namespaces.nr_namespaces); |
731 | |
732 | for (i = 0; i < event->namespaces.nr_namespaces; i++) { |
733 | struct perf_ns_link_info *ns = &event->namespaces.link_info[i]; |
734 | |
735 | ns->dev = bswap_64(ns->dev); |
736 | ns->ino = bswap_64(ns->ino); |
737 | } |
738 | |
739 | if (sample_id_all) |
740 | swap_sample_id_all(event, data: &event->namespaces.link_info[i]); |
741 | } |
742 | |
743 | static void perf_event__cgroup_swap(union perf_event *event, bool sample_id_all) |
744 | { |
745 | event->cgroup.id = bswap_64(event->cgroup.id); |
746 | |
747 | if (sample_id_all) { |
748 | void *data = &event->cgroup.path; |
749 | |
750 | data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); |
751 | swap_sample_id_all(event, data); |
752 | } |
753 | } |
754 | |
755 | static u8 revbyte(u8 b) |
756 | { |
757 | int rev = (b >> 4) | ((b & 0xf) << 4); |
758 | rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); |
759 | rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); |
760 | return (u8) rev; |
761 | } |
762 | |
763 | /* |
764 | * XXX this is hack in attempt to carry flags bitfield |
765 | * through endian village. ABI says: |
766 | * |
767 | * Bit-fields are allocated from right to left (least to most significant) |
768 | * on little-endian implementations and from left to right (most to least |
769 | * significant) on big-endian implementations. |
770 | * |
771 | * The above seems to be byte specific, so we need to reverse each |
772 | * byte of the bitfield. 'Internet' also says this might be implementation |
773 | * specific and we probably need proper fix and carry perf_event_attr |
774 | * bitfield flags in separate data file FEAT_ section. Thought this seems |
775 | * to work for now. |
776 | */ |
777 | static void swap_bitfield(u8 *p, unsigned len) |
778 | { |
779 | unsigned i; |
780 | |
781 | for (i = 0; i < len; i++) { |
782 | *p = revbyte(b: *p); |
783 | p++; |
784 | } |
785 | } |
786 | |
787 | /* exported for swapping attributes in file header */ |
788 | void perf_event__attr_swap(struct perf_event_attr *attr) |
789 | { |
790 | attr->type = bswap_32(attr->type); |
791 | attr->size = bswap_32(attr->size); |
792 | |
793 | #define bswap_safe(f, n) \ |
794 | (attr->size > (offsetof(struct perf_event_attr, f) + \ |
795 | sizeof(attr->f) * (n))) |
796 | #define bswap_field(f, sz) \ |
797 | do { \ |
798 | if (bswap_safe(f, 0)) \ |
799 | attr->f = bswap_##sz(attr->f); \ |
800 | } while(0) |
801 | #define bswap_field_16(f) bswap_field(f, 16) |
802 | #define bswap_field_32(f) bswap_field(f, 32) |
803 | #define bswap_field_64(f) bswap_field(f, 64) |
804 | |
805 | bswap_field_64(config); |
806 | bswap_field_64(sample_period); |
807 | bswap_field_64(sample_type); |
808 | bswap_field_64(read_format); |
809 | bswap_field_32(wakeup_events); |
810 | bswap_field_32(bp_type); |
811 | bswap_field_64(bp_addr); |
812 | bswap_field_64(bp_len); |
813 | bswap_field_64(branch_sample_type); |
814 | bswap_field_64(sample_regs_user); |
815 | bswap_field_32(sample_stack_user); |
816 | bswap_field_32(aux_watermark); |
817 | bswap_field_16(sample_max_stack); |
818 | bswap_field_32(aux_sample_size); |
819 | |
820 | /* |
821 | * After read_format are bitfields. Check read_format because |
822 | * we are unable to use offsetof on bitfield. |
823 | */ |
824 | if (bswap_safe(read_format, 1)) |
825 | swap_bitfield(p: (u8 *) (&attr->read_format + 1), |
826 | len: sizeof(u64)); |
827 | #undef bswap_field_64 |
828 | #undef bswap_field_32 |
829 | #undef bswap_field |
830 | #undef bswap_safe |
831 | } |
832 | |
833 | static void perf_event__hdr_attr_swap(union perf_event *event, |
834 | bool sample_id_all __maybe_unused) |
835 | { |
836 | size_t size; |
837 | |
838 | perf_event__attr_swap(attr: &event->attr.attr); |
839 | |
840 | size = event->header.size; |
841 | size -= perf_record_header_attr_id(event) - (void *)event; |
842 | mem_bswap_64(src: perf_record_header_attr_id(event), byte_size: size); |
843 | } |
844 | |
845 | static void perf_event__event_update_swap(union perf_event *event, |
846 | bool sample_id_all __maybe_unused) |
847 | { |
848 | event->event_update.type = bswap_64(event->event_update.type); |
849 | event->event_update.id = bswap_64(event->event_update.id); |
850 | } |
851 | |
852 | static void perf_event__event_type_swap(union perf_event *event, |
853 | bool sample_id_all __maybe_unused) |
854 | { |
855 | event->event_type.event_type.event_id = |
856 | bswap_64(event->event_type.event_type.event_id); |
857 | } |
858 | |
859 | static void perf_event__tracing_data_swap(union perf_event *event, |
860 | bool sample_id_all __maybe_unused) |
861 | { |
862 | event->tracing_data.size = bswap_32(event->tracing_data.size); |
863 | } |
864 | |
865 | static void perf_event__auxtrace_info_swap(union perf_event *event, |
866 | bool sample_id_all __maybe_unused) |
867 | { |
868 | size_t size; |
869 | |
870 | event->auxtrace_info.type = bswap_32(event->auxtrace_info.type); |
871 | |
872 | size = event->header.size; |
873 | size -= (void *)&event->auxtrace_info.priv - (void *)event; |
874 | mem_bswap_64(src: event->auxtrace_info.priv, byte_size: size); |
875 | } |
876 | |
877 | static void perf_event__auxtrace_swap(union perf_event *event, |
878 | bool sample_id_all __maybe_unused) |
879 | { |
880 | event->auxtrace.size = bswap_64(event->auxtrace.size); |
881 | event->auxtrace.offset = bswap_64(event->auxtrace.offset); |
882 | event->auxtrace.reference = bswap_64(event->auxtrace.reference); |
883 | event->auxtrace.idx = bswap_32(event->auxtrace.idx); |
884 | event->auxtrace.tid = bswap_32(event->auxtrace.tid); |
885 | event->auxtrace.cpu = bswap_32(event->auxtrace.cpu); |
886 | } |
887 | |
888 | static void perf_event__auxtrace_error_swap(union perf_event *event, |
889 | bool sample_id_all __maybe_unused) |
890 | { |
891 | event->auxtrace_error.type = bswap_32(event->auxtrace_error.type); |
892 | event->auxtrace_error.code = bswap_32(event->auxtrace_error.code); |
893 | event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu); |
894 | event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid); |
895 | event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid); |
896 | event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt); |
897 | event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip); |
898 | if (event->auxtrace_error.fmt) |
899 | event->auxtrace_error.time = bswap_64(event->auxtrace_error.time); |
900 | if (event->auxtrace_error.fmt >= 2) { |
901 | event->auxtrace_error.machine_pid = bswap_32(event->auxtrace_error.machine_pid); |
902 | event->auxtrace_error.vcpu = bswap_32(event->auxtrace_error.vcpu); |
903 | } |
904 | } |
905 | |
906 | static void perf_event__thread_map_swap(union perf_event *event, |
907 | bool sample_id_all __maybe_unused) |
908 | { |
909 | unsigned i; |
910 | |
911 | event->thread_map.nr = bswap_64(event->thread_map.nr); |
912 | |
913 | for (i = 0; i < event->thread_map.nr; i++) |
914 | event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid); |
915 | } |
916 | |
917 | static void perf_event__cpu_map_swap(union perf_event *event, |
918 | bool sample_id_all __maybe_unused) |
919 | { |
920 | struct perf_record_cpu_map_data *data = &event->cpu_map.data; |
921 | |
922 | data->type = bswap_16(data->type); |
923 | |
924 | switch (data->type) { |
925 | case PERF_CPU_MAP__CPUS: |
926 | data->cpus_data.nr = bswap_16(data->cpus_data.nr); |
927 | |
928 | for (unsigned i = 0; i < data->cpus_data.nr; i++) |
929 | data->cpus_data.cpu[i] = bswap_16(data->cpus_data.cpu[i]); |
930 | break; |
931 | case PERF_CPU_MAP__MASK: |
932 | data->mask32_data.long_size = bswap_16(data->mask32_data.long_size); |
933 | |
934 | switch (data->mask32_data.long_size) { |
935 | case 4: |
936 | data->mask32_data.nr = bswap_16(data->mask32_data.nr); |
937 | for (unsigned i = 0; i < data->mask32_data.nr; i++) |
938 | data->mask32_data.mask[i] = bswap_32(data->mask32_data.mask[i]); |
939 | break; |
940 | case 8: |
941 | data->mask64_data.nr = bswap_16(data->mask64_data.nr); |
942 | for (unsigned i = 0; i < data->mask64_data.nr; i++) |
943 | data->mask64_data.mask[i] = bswap_64(data->mask64_data.mask[i]); |
944 | break; |
945 | default: |
946 | pr_err("cpu_map swap: unsupported long size\n" ); |
947 | } |
948 | break; |
949 | case PERF_CPU_MAP__RANGE_CPUS: |
950 | data->range_cpu_data.start_cpu = bswap_16(data->range_cpu_data.start_cpu); |
951 | data->range_cpu_data.end_cpu = bswap_16(data->range_cpu_data.end_cpu); |
952 | break; |
953 | default: |
954 | break; |
955 | } |
956 | } |
957 | |
958 | static void perf_event__stat_config_swap(union perf_event *event, |
959 | bool sample_id_all __maybe_unused) |
960 | { |
961 | u64 size; |
962 | |
963 | size = bswap_64(event->stat_config.nr) * sizeof(event->stat_config.data[0]); |
964 | size += 1; /* nr item itself */ |
965 | mem_bswap_64(src: &event->stat_config.nr, byte_size: size); |
966 | } |
967 | |
968 | static void perf_event__stat_swap(union perf_event *event, |
969 | bool sample_id_all __maybe_unused) |
970 | { |
971 | event->stat.id = bswap_64(event->stat.id); |
972 | event->stat.thread = bswap_32(event->stat.thread); |
973 | event->stat.cpu = bswap_32(event->stat.cpu); |
974 | event->stat.val = bswap_64(event->stat.val); |
975 | event->stat.ena = bswap_64(event->stat.ena); |
976 | event->stat.run = bswap_64(event->stat.run); |
977 | } |
978 | |
979 | static void perf_event__stat_round_swap(union perf_event *event, |
980 | bool sample_id_all __maybe_unused) |
981 | { |
982 | event->stat_round.type = bswap_64(event->stat_round.type); |
983 | event->stat_round.time = bswap_64(event->stat_round.time); |
984 | } |
985 | |
986 | static void perf_event__time_conv_swap(union perf_event *event, |
987 | bool sample_id_all __maybe_unused) |
988 | { |
989 | event->time_conv.time_shift = bswap_64(event->time_conv.time_shift); |
990 | event->time_conv.time_mult = bswap_64(event->time_conv.time_mult); |
991 | event->time_conv.time_zero = bswap_64(event->time_conv.time_zero); |
992 | |
993 | if (event_contains(event->time_conv, time_cycles)) { |
994 | event->time_conv.time_cycles = bswap_64(event->time_conv.time_cycles); |
995 | event->time_conv.time_mask = bswap_64(event->time_conv.time_mask); |
996 | } |
997 | } |
998 | |
999 | typedef void (*perf_event__swap_op)(union perf_event *event, |
1000 | bool sample_id_all); |
1001 | |
1002 | static perf_event__swap_op perf_event__swap_ops[] = { |
1003 | [PERF_RECORD_MMAP] = perf_event__mmap_swap, |
1004 | [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, |
1005 | [PERF_RECORD_COMM] = perf_event__comm_swap, |
1006 | [PERF_RECORD_FORK] = perf_event__task_swap, |
1007 | [PERF_RECORD_EXIT] = perf_event__task_swap, |
1008 | [PERF_RECORD_LOST] = perf_event__all64_swap, |
1009 | [PERF_RECORD_READ] = perf_event__read_swap, |
1010 | [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, |
1011 | [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, |
1012 | [PERF_RECORD_SAMPLE] = perf_event__all64_swap, |
1013 | [PERF_RECORD_AUX] = perf_event__aux_swap, |
1014 | [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap, |
1015 | [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap, |
1016 | [PERF_RECORD_SWITCH] = perf_event__switch_swap, |
1017 | [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap, |
1018 | [PERF_RECORD_NAMESPACES] = perf_event__namespaces_swap, |
1019 | [PERF_RECORD_CGROUP] = perf_event__cgroup_swap, |
1020 | [PERF_RECORD_TEXT_POKE] = perf_event__text_poke_swap, |
1021 | [PERF_RECORD_AUX_OUTPUT_HW_ID] = perf_event__all64_swap, |
1022 | [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, |
1023 | [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, |
1024 | [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, |
1025 | [PERF_RECORD_HEADER_BUILD_ID] = NULL, |
1026 | [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, |
1027 | [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap, |
1028 | [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap, |
1029 | [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap, |
1030 | [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap, |
1031 | [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap, |
1032 | [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap, |
1033 | [PERF_RECORD_STAT] = perf_event__stat_swap, |
1034 | [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap, |
1035 | [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap, |
1036 | [PERF_RECORD_TIME_CONV] = perf_event__time_conv_swap, |
1037 | [PERF_RECORD_HEADER_MAX] = NULL, |
1038 | }; |
1039 | |
1040 | /* |
1041 | * When perf record finishes a pass on every buffers, it records this pseudo |
1042 | * event. |
1043 | * We record the max timestamp t found in the pass n. |
1044 | * Assuming these timestamps are monotonic across cpus, we know that if |
1045 | * a buffer still has events with timestamps below t, they will be all |
1046 | * available and then read in the pass n + 1. |
1047 | * Hence when we start to read the pass n + 2, we can safely flush every |
1048 | * events with timestamps below t. |
1049 | * |
1050 | * ============ PASS n ================= |
1051 | * CPU 0 | CPU 1 |
1052 | * | |
1053 | * cnt1 timestamps | cnt2 timestamps |
1054 | * 1 | 2 |
1055 | * 2 | 3 |
1056 | * - | 4 <--- max recorded |
1057 | * |
1058 | * ============ PASS n + 1 ============== |
1059 | * CPU 0 | CPU 1 |
1060 | * | |
1061 | * cnt1 timestamps | cnt2 timestamps |
1062 | * 3 | 5 |
1063 | * 4 | 6 |
1064 | * 5 | 7 <---- max recorded |
1065 | * |
1066 | * Flush every events below timestamp 4 |
1067 | * |
1068 | * ============ PASS n + 2 ============== |
1069 | * CPU 0 | CPU 1 |
1070 | * | |
1071 | * cnt1 timestamps | cnt2 timestamps |
1072 | * 6 | 8 |
1073 | * 7 | 9 |
1074 | * - | 10 |
1075 | * |
1076 | * Flush every events below timestamp 7 |
1077 | * etc... |
1078 | */ |
1079 | int perf_event__process_finished_round(struct perf_tool *tool __maybe_unused, |
1080 | union perf_event *event __maybe_unused, |
1081 | struct ordered_events *oe) |
1082 | { |
1083 | if (dump_trace) |
1084 | fprintf(stdout, "\n" ); |
1085 | return ordered_events__flush(oe, how: OE_FLUSH__ROUND); |
1086 | } |
1087 | |
1088 | int perf_session__queue_event(struct perf_session *s, union perf_event *event, |
1089 | u64 timestamp, u64 file_offset, const char *file_path) |
1090 | { |
1091 | return ordered_events__queue(oe: &s->ordered_events, event, timestamp, file_offset, file_path); |
1092 | } |
1093 | |
1094 | static void callchain__lbr_callstack_printf(struct perf_sample *sample) |
1095 | { |
1096 | struct ip_callchain *callchain = sample->callchain; |
1097 | struct branch_stack *lbr_stack = sample->branch_stack; |
1098 | struct branch_entry *entries = perf_sample__branch_entries(sample); |
1099 | u64 kernel_callchain_nr = callchain->nr; |
1100 | unsigned int i; |
1101 | |
1102 | for (i = 0; i < kernel_callchain_nr; i++) { |
1103 | if (callchain->ips[i] == PERF_CONTEXT_USER) |
1104 | break; |
1105 | } |
1106 | |
1107 | if ((i != kernel_callchain_nr) && lbr_stack->nr) { |
1108 | u64 total_nr; |
1109 | /* |
1110 | * LBR callstack can only get user call chain, |
1111 | * i is kernel call chain number, |
1112 | * 1 is PERF_CONTEXT_USER. |
1113 | * |
1114 | * The user call chain is stored in LBR registers. |
1115 | * LBR are pair registers. The caller is stored |
1116 | * in "from" register, while the callee is stored |
1117 | * in "to" register. |
1118 | * For example, there is a call stack |
1119 | * "A"->"B"->"C"->"D". |
1120 | * The LBR registers will be recorded like |
1121 | * "C"->"D", "B"->"C", "A"->"B". |
1122 | * So only the first "to" register and all "from" |
1123 | * registers are needed to construct the whole stack. |
1124 | */ |
1125 | total_nr = i + 1 + lbr_stack->nr + 1; |
1126 | kernel_callchain_nr = i + 1; |
1127 | |
1128 | printf("... LBR call chain: nr:%" PRIu64 "\n" , total_nr); |
1129 | |
1130 | for (i = 0; i < kernel_callchain_nr; i++) |
1131 | printf("..... %2d: %016" PRIx64 "\n" , |
1132 | i, callchain->ips[i]); |
1133 | |
1134 | printf("..... %2d: %016" PRIx64 "\n" , |
1135 | (int)(kernel_callchain_nr), entries[0].to); |
1136 | for (i = 0; i < lbr_stack->nr; i++) |
1137 | printf("..... %2d: %016" PRIx64 "\n" , |
1138 | (int)(i + kernel_callchain_nr + 1), entries[i].from); |
1139 | } |
1140 | } |
1141 | |
1142 | static void callchain__printf(struct evsel *evsel, |
1143 | struct perf_sample *sample) |
1144 | { |
1145 | unsigned int i; |
1146 | struct ip_callchain *callchain = sample->callchain; |
1147 | |
1148 | if (evsel__has_branch_callstack(evsel)) |
1149 | callchain__lbr_callstack_printf(sample); |
1150 | |
1151 | printf("... FP chain: nr:%" PRIu64 "\n" , callchain->nr); |
1152 | |
1153 | for (i = 0; i < callchain->nr; i++) |
1154 | printf("..... %2d: %016" PRIx64 "\n" , |
1155 | i, callchain->ips[i]); |
1156 | } |
1157 | |
1158 | static void branch_stack__printf(struct perf_sample *sample, |
1159 | struct evsel *evsel) |
1160 | { |
1161 | struct branch_entry *entries = perf_sample__branch_entries(sample); |
1162 | bool callstack = evsel__has_branch_callstack(evsel); |
1163 | u64 *branch_stack_cntr = sample->branch_stack_cntr; |
1164 | struct perf_env *env = evsel__env(evsel); |
1165 | uint64_t i; |
1166 | |
1167 | if (!callstack) { |
1168 | printf("%s: nr:%" PRIu64 "\n" , "... branch stack" , sample->branch_stack->nr); |
1169 | } else { |
1170 | /* the reason of adding 1 to nr is because after expanding |
1171 | * branch stack it generates nr + 1 callstack records. e.g., |
1172 | * B()->C() |
1173 | * A()->B() |
1174 | * the final callstack should be: |
1175 | * C() |
1176 | * B() |
1177 | * A() |
1178 | */ |
1179 | printf("%s: nr:%" PRIu64 "\n" , "... branch callstack" , sample->branch_stack->nr+1); |
1180 | } |
1181 | |
1182 | for (i = 0; i < sample->branch_stack->nr; i++) { |
1183 | struct branch_entry *e = &entries[i]; |
1184 | |
1185 | if (!callstack) { |
1186 | printf("..... %2" PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x %s %s\n" , |
1187 | i, e->from, e->to, |
1188 | (unsigned short)e->flags.cycles, |
1189 | e->flags.mispred ? "M" : " " , |
1190 | e->flags.predicted ? "P" : " " , |
1191 | e->flags.abort ? "A" : " " , |
1192 | e->flags.in_tx ? "T" : " " , |
1193 | (unsigned)e->flags.reserved, |
1194 | get_branch_type(e), |
1195 | e->flags.spec ? branch_spec_desc(e->flags.spec) : "" ); |
1196 | } else { |
1197 | if (i == 0) { |
1198 | printf("..... %2" PRIu64": %016" PRIx64 "\n" |
1199 | "..... %2" PRIu64": %016" PRIx64 "\n" , |
1200 | i, e->to, i+1, e->from); |
1201 | } else { |
1202 | printf("..... %2" PRIu64": %016" PRIx64 "\n" , i+1, e->from); |
1203 | } |
1204 | } |
1205 | } |
1206 | |
1207 | if (branch_stack_cntr) { |
1208 | printf("... branch stack counters: nr:%" PRIu64 " (counter width: %u max counter nr:%u)\n" , |
1209 | sample->branch_stack->nr, env->br_cntr_width, env->br_cntr_nr); |
1210 | for (i = 0; i < sample->branch_stack->nr; i++) |
1211 | printf("..... %2" PRIu64": %016" PRIx64 "\n" , i, branch_stack_cntr[i]); |
1212 | } |
1213 | } |
1214 | |
1215 | static void regs_dump__printf(u64 mask, u64 *regs, const char *arch) |
1216 | { |
1217 | unsigned rid, i = 0; |
1218 | |
1219 | for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { |
1220 | u64 val = regs[i++]; |
1221 | |
1222 | printf(".... %-5s 0x%016" PRIx64 "\n" , |
1223 | perf_reg_name(rid, arch), val); |
1224 | } |
1225 | } |
1226 | |
1227 | static const char *regs_abi[] = { |
1228 | [PERF_SAMPLE_REGS_ABI_NONE] = "none" , |
1229 | [PERF_SAMPLE_REGS_ABI_32] = "32-bit" , |
1230 | [PERF_SAMPLE_REGS_ABI_64] = "64-bit" , |
1231 | }; |
1232 | |
1233 | static inline const char *regs_dump_abi(struct regs_dump *d) |
1234 | { |
1235 | if (d->abi > PERF_SAMPLE_REGS_ABI_64) |
1236 | return "unknown" ; |
1237 | |
1238 | return regs_abi[d->abi]; |
1239 | } |
1240 | |
1241 | static void regs__printf(const char *type, struct regs_dump *regs, const char *arch) |
1242 | { |
1243 | u64 mask = regs->mask; |
1244 | |
1245 | printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n" , |
1246 | type, |
1247 | mask, |
1248 | regs_dump_abi(regs)); |
1249 | |
1250 | regs_dump__printf(mask, regs: regs->regs, arch); |
1251 | } |
1252 | |
1253 | static void regs_user__printf(struct perf_sample *sample, const char *arch) |
1254 | { |
1255 | struct regs_dump *user_regs = &sample->user_regs; |
1256 | |
1257 | if (user_regs->regs) |
1258 | regs__printf(type: "user" , regs: user_regs, arch); |
1259 | } |
1260 | |
1261 | static void regs_intr__printf(struct perf_sample *sample, const char *arch) |
1262 | { |
1263 | struct regs_dump *intr_regs = &sample->intr_regs; |
1264 | |
1265 | if (intr_regs->regs) |
1266 | regs__printf(type: "intr" , regs: intr_regs, arch); |
1267 | } |
1268 | |
1269 | static void stack_user__printf(struct stack_dump *dump) |
1270 | { |
1271 | printf("... ustack: size %" PRIu64 ", offset 0x%x\n" , |
1272 | dump->size, dump->offset); |
1273 | } |
1274 | |
1275 | static void evlist__print_tstamp(struct evlist *evlist, union perf_event *event, struct perf_sample *sample) |
1276 | { |
1277 | u64 sample_type = __evlist__combined_sample_type(evlist); |
1278 | |
1279 | if (event->header.type != PERF_RECORD_SAMPLE && |
1280 | !evlist__sample_id_all(evlist)) { |
1281 | fputs("-1 -1 " , stdout); |
1282 | return; |
1283 | } |
1284 | |
1285 | if ((sample_type & PERF_SAMPLE_CPU)) |
1286 | printf("%u " , sample->cpu); |
1287 | |
1288 | if (sample_type & PERF_SAMPLE_TIME) |
1289 | printf("%" PRIu64 " " , sample->time); |
1290 | } |
1291 | |
1292 | static void sample_read__printf(struct perf_sample *sample, u64 read_format) |
1293 | { |
1294 | printf("... sample_read:\n" ); |
1295 | |
1296 | if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) |
1297 | printf("...... time enabled %016" PRIx64 "\n" , |
1298 | sample->read.time_enabled); |
1299 | |
1300 | if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) |
1301 | printf("...... time running %016" PRIx64 "\n" , |
1302 | sample->read.time_running); |
1303 | |
1304 | if (read_format & PERF_FORMAT_GROUP) { |
1305 | struct sample_read_value *value = sample->read.group.values; |
1306 | |
1307 | printf(".... group nr %" PRIu64 "\n" , sample->read.group.nr); |
1308 | |
1309 | sample_read_group__for_each(value, sample->read.group.nr, read_format) { |
1310 | printf("..... id %016" PRIx64 |
1311 | ", value %016" PRIx64, |
1312 | value->id, value->value); |
1313 | if (read_format & PERF_FORMAT_LOST) |
1314 | printf(", lost %" PRIu64, value->lost); |
1315 | printf("\n" ); |
1316 | } |
1317 | } else { |
1318 | printf("..... id %016" PRIx64 ", value %016" PRIx64, |
1319 | sample->read.one.id, sample->read.one.value); |
1320 | if (read_format & PERF_FORMAT_LOST) |
1321 | printf(", lost %" PRIu64, sample->read.one.lost); |
1322 | printf("\n" ); |
1323 | } |
1324 | } |
1325 | |
1326 | static void dump_event(struct evlist *evlist, union perf_event *event, |
1327 | u64 file_offset, struct perf_sample *sample, |
1328 | const char *file_path) |
1329 | { |
1330 | if (!dump_trace) |
1331 | return; |
1332 | |
1333 | printf("\n%#" PRIx64 "@%s [%#x]: event: %d\n" , |
1334 | file_offset, file_path, event->header.size, event->header.type); |
1335 | |
1336 | trace_event(event); |
1337 | if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw) |
1338 | evlist->trace_event_sample_raw(evlist, event, sample); |
1339 | |
1340 | if (sample) |
1341 | evlist__print_tstamp(evlist, event, sample); |
1342 | |
1343 | printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s" , file_offset, |
1344 | event->header.size, perf_event__name(event->header.type)); |
1345 | } |
1346 | |
1347 | char *get_page_size_name(u64 size, char *str) |
1348 | { |
1349 | if (!size || !unit_number__scnprintf(buf: str, PAGE_SIZE_NAME_LEN, n: size)) |
1350 | snprintf(buf: str, PAGE_SIZE_NAME_LEN, fmt: "%s" , "N/A" ); |
1351 | |
1352 | return str; |
1353 | } |
1354 | |
1355 | static void dump_sample(struct evsel *evsel, union perf_event *event, |
1356 | struct perf_sample *sample, const char *arch) |
1357 | { |
1358 | u64 sample_type; |
1359 | char str[PAGE_SIZE_NAME_LEN]; |
1360 | |
1361 | if (!dump_trace) |
1362 | return; |
1363 | |
1364 | printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n" , |
1365 | event->header.misc, sample->pid, sample->tid, sample->ip, |
1366 | sample->period, sample->addr); |
1367 | |
1368 | sample_type = evsel->core.attr.sample_type; |
1369 | |
1370 | if (evsel__has_callchain(evsel)) |
1371 | callchain__printf(evsel, sample); |
1372 | |
1373 | if (evsel__has_br_stack(evsel)) |
1374 | branch_stack__printf(sample, evsel); |
1375 | |
1376 | if (sample_type & PERF_SAMPLE_REGS_USER) |
1377 | regs_user__printf(sample, arch); |
1378 | |
1379 | if (sample_type & PERF_SAMPLE_REGS_INTR) |
1380 | regs_intr__printf(sample, arch); |
1381 | |
1382 | if (sample_type & PERF_SAMPLE_STACK_USER) |
1383 | stack_user__printf(dump: &sample->user_stack); |
1384 | |
1385 | if (sample_type & PERF_SAMPLE_WEIGHT_TYPE) { |
1386 | printf("... weight: %" PRIu64 "" , sample->weight); |
1387 | if (sample_type & PERF_SAMPLE_WEIGHT_STRUCT) { |
1388 | printf(",0x%" PRIx16"" , sample->ins_lat); |
1389 | printf(",0x%" PRIx16"" , sample->p_stage_cyc); |
1390 | } |
1391 | printf("\n" ); |
1392 | } |
1393 | |
1394 | if (sample_type & PERF_SAMPLE_DATA_SRC) |
1395 | printf(" . data_src: 0x%" PRIx64"\n" , sample->data_src); |
1396 | |
1397 | if (sample_type & PERF_SAMPLE_PHYS_ADDR) |
1398 | printf(" .. phys_addr: 0x%" PRIx64"\n" , sample->phys_addr); |
1399 | |
1400 | if (sample_type & PERF_SAMPLE_DATA_PAGE_SIZE) |
1401 | printf(" .. data page size: %s\n" , get_page_size_name(size: sample->data_page_size, str)); |
1402 | |
1403 | if (sample_type & PERF_SAMPLE_CODE_PAGE_SIZE) |
1404 | printf(" .. code page size: %s\n" , get_page_size_name(size: sample->code_page_size, str)); |
1405 | |
1406 | if (sample_type & PERF_SAMPLE_TRANSACTION) |
1407 | printf("... transaction: %" PRIx64 "\n" , sample->transaction); |
1408 | |
1409 | if (sample_type & PERF_SAMPLE_READ) |
1410 | sample_read__printf(sample, read_format: evsel->core.attr.read_format); |
1411 | } |
1412 | |
1413 | static void dump_read(struct evsel *evsel, union perf_event *event) |
1414 | { |
1415 | struct perf_record_read *read_event = &event->read; |
1416 | u64 read_format; |
1417 | |
1418 | if (!dump_trace) |
1419 | return; |
1420 | |
1421 | printf(": %d %d %s %" PRI_lu64 "\n" , event->read.pid, event->read.tid, |
1422 | evsel__name(evsel), event->read.value); |
1423 | |
1424 | if (!evsel) |
1425 | return; |
1426 | |
1427 | read_format = evsel->core.attr.read_format; |
1428 | |
1429 | if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) |
1430 | printf("... time enabled : %" PRI_lu64 "\n" , read_event->time_enabled); |
1431 | |
1432 | if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) |
1433 | printf("... time running : %" PRI_lu64 "\n" , read_event->time_running); |
1434 | |
1435 | if (read_format & PERF_FORMAT_ID) |
1436 | printf("... id : %" PRI_lu64 "\n" , read_event->id); |
1437 | |
1438 | if (read_format & PERF_FORMAT_LOST) |
1439 | printf("... lost : %" PRI_lu64 "\n" , read_event->lost); |
1440 | } |
1441 | |
1442 | static struct machine *machines__find_for_cpumode(struct machines *machines, |
1443 | union perf_event *event, |
1444 | struct perf_sample *sample) |
1445 | { |
1446 | if (perf_guest && |
1447 | ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || |
1448 | (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) { |
1449 | u32 pid; |
1450 | |
1451 | if (sample->machine_pid) |
1452 | pid = sample->machine_pid; |
1453 | else if (event->header.type == PERF_RECORD_MMAP |
1454 | || event->header.type == PERF_RECORD_MMAP2) |
1455 | pid = event->mmap.pid; |
1456 | else |
1457 | pid = sample->pid; |
1458 | |
1459 | /* |
1460 | * Guest code machine is created as needed and does not use |
1461 | * DEFAULT_GUEST_KERNEL_ID. |
1462 | */ |
1463 | if (symbol_conf.guest_code) |
1464 | return machines__findnew(machines, pid); |
1465 | |
1466 | return machines__find_guest(machines, pid); |
1467 | } |
1468 | |
1469 | return &machines->host; |
1470 | } |
1471 | |
1472 | static int deliver_sample_value(struct evlist *evlist, |
1473 | struct perf_tool *tool, |
1474 | union perf_event *event, |
1475 | struct perf_sample *sample, |
1476 | struct sample_read_value *v, |
1477 | struct machine *machine) |
1478 | { |
1479 | struct perf_sample_id *sid = evlist__id2sid(evlist, id: v->id); |
1480 | struct evsel *evsel; |
1481 | |
1482 | if (sid) { |
1483 | sample->id = v->id; |
1484 | sample->period = v->value - sid->period; |
1485 | sid->period = v->value; |
1486 | } |
1487 | |
1488 | if (!sid || sid->evsel == NULL) { |
1489 | ++evlist->stats.nr_unknown_id; |
1490 | return 0; |
1491 | } |
1492 | |
1493 | /* |
1494 | * There's no reason to deliver sample |
1495 | * for zero period, bail out. |
1496 | */ |
1497 | if (!sample->period) |
1498 | return 0; |
1499 | |
1500 | evsel = container_of(sid->evsel, struct evsel, core); |
1501 | return tool->sample(tool, event, sample, evsel, machine); |
1502 | } |
1503 | |
1504 | static int deliver_sample_group(struct evlist *evlist, |
1505 | struct perf_tool *tool, |
1506 | union perf_event *event, |
1507 | struct perf_sample *sample, |
1508 | struct machine *machine, |
1509 | u64 read_format) |
1510 | { |
1511 | int ret = -EINVAL; |
1512 | struct sample_read_value *v = sample->read.group.values; |
1513 | |
1514 | sample_read_group__for_each(v, sample->read.group.nr, read_format) { |
1515 | ret = deliver_sample_value(evlist, tool, event, sample, v, |
1516 | machine); |
1517 | if (ret) |
1518 | break; |
1519 | } |
1520 | |
1521 | return ret; |
1522 | } |
1523 | |
1524 | static int evlist__deliver_sample(struct evlist *evlist, struct perf_tool *tool, |
1525 | union perf_event *event, struct perf_sample *sample, |
1526 | struct evsel *evsel, struct machine *machine) |
1527 | { |
1528 | /* We know evsel != NULL. */ |
1529 | u64 sample_type = evsel->core.attr.sample_type; |
1530 | u64 read_format = evsel->core.attr.read_format; |
1531 | |
1532 | /* Standard sample delivery. */ |
1533 | if (!(sample_type & PERF_SAMPLE_READ)) |
1534 | return tool->sample(tool, event, sample, evsel, machine); |
1535 | |
1536 | /* For PERF_SAMPLE_READ we have either single or group mode. */ |
1537 | if (read_format & PERF_FORMAT_GROUP) |
1538 | return deliver_sample_group(evlist, tool, event, sample, |
1539 | machine, read_format); |
1540 | else |
1541 | return deliver_sample_value(evlist, tool, event, sample, |
1542 | v: &sample->read.one, machine); |
1543 | } |
1544 | |
1545 | static int machines__deliver_event(struct machines *machines, |
1546 | struct evlist *evlist, |
1547 | union perf_event *event, |
1548 | struct perf_sample *sample, |
1549 | struct perf_tool *tool, u64 file_offset, |
1550 | const char *file_path) |
1551 | { |
1552 | struct evsel *evsel; |
1553 | struct machine *machine; |
1554 | |
1555 | dump_event(evlist, event, file_offset, sample, file_path); |
1556 | |
1557 | evsel = evlist__id2evsel(evlist, id: sample->id); |
1558 | |
1559 | machine = machines__find_for_cpumode(machines, event, sample); |
1560 | |
1561 | switch (event->header.type) { |
1562 | case PERF_RECORD_SAMPLE: |
1563 | if (evsel == NULL) { |
1564 | ++evlist->stats.nr_unknown_id; |
1565 | return 0; |
1566 | } |
1567 | if (machine == NULL) { |
1568 | ++evlist->stats.nr_unprocessable_samples; |
1569 | dump_sample(evsel, event, sample, arch: perf_env__arch(NULL)); |
1570 | return 0; |
1571 | } |
1572 | dump_sample(evsel, event, sample, arch: perf_env__arch(env: machine->env)); |
1573 | return evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); |
1574 | case PERF_RECORD_MMAP: |
1575 | return tool->mmap(tool, event, sample, machine); |
1576 | case PERF_RECORD_MMAP2: |
1577 | if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) |
1578 | ++evlist->stats.nr_proc_map_timeout; |
1579 | return tool->mmap2(tool, event, sample, machine); |
1580 | case PERF_RECORD_COMM: |
1581 | return tool->comm(tool, event, sample, machine); |
1582 | case PERF_RECORD_NAMESPACES: |
1583 | return tool->namespaces(tool, event, sample, machine); |
1584 | case PERF_RECORD_CGROUP: |
1585 | return tool->cgroup(tool, event, sample, machine); |
1586 | case PERF_RECORD_FORK: |
1587 | return tool->fork(tool, event, sample, machine); |
1588 | case PERF_RECORD_EXIT: |
1589 | return tool->exit(tool, event, sample, machine); |
1590 | case PERF_RECORD_LOST: |
1591 | if (tool->lost == perf_event__process_lost) |
1592 | evlist->stats.total_lost += event->lost.lost; |
1593 | return tool->lost(tool, event, sample, machine); |
1594 | case PERF_RECORD_LOST_SAMPLES: |
1595 | if (tool->lost_samples == perf_event__process_lost_samples && |
1596 | !(event->header.misc & PERF_RECORD_MISC_LOST_SAMPLES_BPF)) |
1597 | evlist->stats.total_lost_samples += event->lost_samples.lost; |
1598 | return tool->lost_samples(tool, event, sample, machine); |
1599 | case PERF_RECORD_READ: |
1600 | dump_read(evsel, event); |
1601 | return tool->read(tool, event, sample, evsel, machine); |
1602 | case PERF_RECORD_THROTTLE: |
1603 | return tool->throttle(tool, event, sample, machine); |
1604 | case PERF_RECORD_UNTHROTTLE: |
1605 | return tool->unthrottle(tool, event, sample, machine); |
1606 | case PERF_RECORD_AUX: |
1607 | if (tool->aux == perf_event__process_aux) { |
1608 | if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) |
1609 | evlist->stats.total_aux_lost += 1; |
1610 | if (event->aux.flags & PERF_AUX_FLAG_PARTIAL) |
1611 | evlist->stats.total_aux_partial += 1; |
1612 | if (event->aux.flags & PERF_AUX_FLAG_COLLISION) |
1613 | evlist->stats.total_aux_collision += 1; |
1614 | } |
1615 | return tool->aux(tool, event, sample, machine); |
1616 | case PERF_RECORD_ITRACE_START: |
1617 | return tool->itrace_start(tool, event, sample, machine); |
1618 | case PERF_RECORD_SWITCH: |
1619 | case PERF_RECORD_SWITCH_CPU_WIDE: |
1620 | return tool->context_switch(tool, event, sample, machine); |
1621 | case PERF_RECORD_KSYMBOL: |
1622 | return tool->ksymbol(tool, event, sample, machine); |
1623 | case PERF_RECORD_BPF_EVENT: |
1624 | return tool->bpf(tool, event, sample, machine); |
1625 | case PERF_RECORD_TEXT_POKE: |
1626 | return tool->text_poke(tool, event, sample, machine); |
1627 | case PERF_RECORD_AUX_OUTPUT_HW_ID: |
1628 | return tool->aux_output_hw_id(tool, event, sample, machine); |
1629 | default: |
1630 | ++evlist->stats.nr_unknown_events; |
1631 | return -1; |
1632 | } |
1633 | } |
1634 | |
1635 | static int perf_session__deliver_event(struct perf_session *session, |
1636 | union perf_event *event, |
1637 | struct perf_tool *tool, |
1638 | u64 file_offset, |
1639 | const char *file_path) |
1640 | { |
1641 | struct perf_sample sample; |
1642 | int ret = evlist__parse_sample(evlist: session->evlist, event, sample: &sample); |
1643 | |
1644 | if (ret) { |
1645 | pr_err("Can't parse sample, err = %d\n" , ret); |
1646 | return ret; |
1647 | } |
1648 | |
1649 | ret = auxtrace__process_event(session, event, sample: &sample, tool); |
1650 | if (ret < 0) |
1651 | return ret; |
1652 | if (ret > 0) |
1653 | return 0; |
1654 | |
1655 | ret = machines__deliver_event(machines: &session->machines, evlist: session->evlist, |
1656 | event, sample: &sample, tool, file_offset, file_path); |
1657 | |
1658 | if (dump_trace && sample.aux_sample.size) |
1659 | auxtrace__dump_auxtrace_sample(session, sample: &sample); |
1660 | |
1661 | return ret; |
1662 | } |
1663 | |
1664 | static s64 perf_session__process_user_event(struct perf_session *session, |
1665 | union perf_event *event, |
1666 | u64 file_offset, |
1667 | const char *file_path) |
1668 | { |
1669 | struct ordered_events *oe = &session->ordered_events; |
1670 | struct perf_tool *tool = session->tool; |
1671 | struct perf_sample sample = { .time = 0, }; |
1672 | int fd = perf_data__fd(data: session->data); |
1673 | int err; |
1674 | |
1675 | if (event->header.type != PERF_RECORD_COMPRESSED || |
1676 | tool->compressed == perf_session__process_compressed_event_stub) |
1677 | dump_event(evlist: session->evlist, event, file_offset, sample: &sample, file_path); |
1678 | |
1679 | /* These events are processed right away */ |
1680 | switch (event->header.type) { |
1681 | case PERF_RECORD_HEADER_ATTR: |
1682 | err = tool->attr(tool, event, &session->evlist); |
1683 | if (err == 0) { |
1684 | perf_session__set_id_hdr_size(session); |
1685 | perf_session__set_comm_exec(session); |
1686 | } |
1687 | return err; |
1688 | case PERF_RECORD_EVENT_UPDATE: |
1689 | return tool->event_update(tool, event, &session->evlist); |
1690 | case PERF_RECORD_HEADER_EVENT_TYPE: |
1691 | /* |
1692 | * Deprecated, but we need to handle it for sake |
1693 | * of old data files create in pipe mode. |
1694 | */ |
1695 | return 0; |
1696 | case PERF_RECORD_HEADER_TRACING_DATA: |
1697 | /* |
1698 | * Setup for reading amidst mmap, but only when we |
1699 | * are in 'file' mode. The 'pipe' fd is in proper |
1700 | * place already. |
1701 | */ |
1702 | if (!perf_data__is_pipe(data: session->data)) |
1703 | lseek(fd, file_offset, SEEK_SET); |
1704 | return tool->tracing_data(session, event); |
1705 | case PERF_RECORD_HEADER_BUILD_ID: |
1706 | return tool->build_id(session, event); |
1707 | case PERF_RECORD_FINISHED_ROUND: |
1708 | return tool->finished_round(tool, event, oe); |
1709 | case PERF_RECORD_ID_INDEX: |
1710 | return tool->id_index(session, event); |
1711 | case PERF_RECORD_AUXTRACE_INFO: |
1712 | return tool->auxtrace_info(session, event); |
1713 | case PERF_RECORD_AUXTRACE: |
1714 | /* |
1715 | * Setup for reading amidst mmap, but only when we |
1716 | * are in 'file' mode. The 'pipe' fd is in proper |
1717 | * place already. |
1718 | */ |
1719 | if (!perf_data__is_pipe(data: session->data)) |
1720 | lseek(fd, file_offset + event->header.size, SEEK_SET); |
1721 | return tool->auxtrace(session, event); |
1722 | case PERF_RECORD_AUXTRACE_ERROR: |
1723 | perf_session__auxtrace_error_inc(session, event); |
1724 | return tool->auxtrace_error(session, event); |
1725 | case PERF_RECORD_THREAD_MAP: |
1726 | return tool->thread_map(session, event); |
1727 | case PERF_RECORD_CPU_MAP: |
1728 | return tool->cpu_map(session, event); |
1729 | case PERF_RECORD_STAT_CONFIG: |
1730 | return tool->stat_config(session, event); |
1731 | case PERF_RECORD_STAT: |
1732 | return tool->stat(session, event); |
1733 | case PERF_RECORD_STAT_ROUND: |
1734 | return tool->stat_round(session, event); |
1735 | case PERF_RECORD_TIME_CONV: |
1736 | session->time_conv = event->time_conv; |
1737 | return tool->time_conv(session, event); |
1738 | case PERF_RECORD_HEADER_FEATURE: |
1739 | return tool->feature(session, event); |
1740 | case PERF_RECORD_COMPRESSED: |
1741 | err = tool->compressed(session, event, file_offset, file_path); |
1742 | if (err) |
1743 | dump_event(evlist: session->evlist, event, file_offset, sample: &sample, file_path); |
1744 | return err; |
1745 | case PERF_RECORD_FINISHED_INIT: |
1746 | return tool->finished_init(session, event); |
1747 | default: |
1748 | return -EINVAL; |
1749 | } |
1750 | } |
1751 | |
1752 | int perf_session__deliver_synth_event(struct perf_session *session, |
1753 | union perf_event *event, |
1754 | struct perf_sample *sample) |
1755 | { |
1756 | struct evlist *evlist = session->evlist; |
1757 | struct perf_tool *tool = session->tool; |
1758 | |
1759 | events_stats__inc(stats: &evlist->stats, type: event->header.type); |
1760 | |
1761 | if (event->header.type >= PERF_RECORD_USER_TYPE_START) |
1762 | return perf_session__process_user_event(session, event, file_offset: 0, NULL); |
1763 | |
1764 | return machines__deliver_event(machines: &session->machines, evlist, event, sample, tool, file_offset: 0, NULL); |
1765 | } |
1766 | |
1767 | static void event_swap(union perf_event *event, bool sample_id_all) |
1768 | { |
1769 | perf_event__swap_op swap; |
1770 | |
1771 | swap = perf_event__swap_ops[event->header.type]; |
1772 | if (swap) |
1773 | swap(event, sample_id_all); |
1774 | } |
1775 | |
1776 | int perf_session__peek_event(struct perf_session *session, off_t file_offset, |
1777 | void *buf, size_t buf_sz, |
1778 | union perf_event **event_ptr, |
1779 | struct perf_sample *sample) |
1780 | { |
1781 | union perf_event *event; |
1782 | size_t hdr_sz, rest; |
1783 | int fd; |
1784 | |
1785 | if (session->one_mmap && !session->header.needs_swap) { |
1786 | event = file_offset - session->one_mmap_offset + |
1787 | session->one_mmap_addr; |
1788 | goto out_parse_sample; |
1789 | } |
1790 | |
1791 | if (perf_data__is_pipe(data: session->data)) |
1792 | return -1; |
1793 | |
1794 | fd = perf_data__fd(data: session->data); |
1795 | hdr_sz = sizeof(struct perf_event_header); |
1796 | |
1797 | if (buf_sz < hdr_sz) |
1798 | return -1; |
1799 | |
1800 | if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || |
1801 | readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) |
1802 | return -1; |
1803 | |
1804 | event = (union perf_event *)buf; |
1805 | |
1806 | if (session->header.needs_swap) |
1807 | perf_event_header__bswap(hdr: &event->header); |
1808 | |
1809 | if (event->header.size < hdr_sz || event->header.size > buf_sz) |
1810 | return -1; |
1811 | |
1812 | buf += hdr_sz; |
1813 | rest = event->header.size - hdr_sz; |
1814 | |
1815 | if (readn(fd, buf, rest) != (ssize_t)rest) |
1816 | return -1; |
1817 | |
1818 | if (session->header.needs_swap) |
1819 | event_swap(event, sample_id_all: evlist__sample_id_all(evlist: session->evlist)); |
1820 | |
1821 | out_parse_sample: |
1822 | |
1823 | if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && |
1824 | evlist__parse_sample(session->evlist, event, sample)) |
1825 | return -1; |
1826 | |
1827 | *event_ptr = event; |
1828 | |
1829 | return 0; |
1830 | } |
1831 | |
1832 | int perf_session__peek_events(struct perf_session *session, u64 offset, |
1833 | u64 size, peek_events_cb_t cb, void *data) |
1834 | { |
1835 | u64 max_offset = offset + size; |
1836 | char buf[PERF_SAMPLE_MAX_SIZE]; |
1837 | union perf_event *event; |
1838 | int err; |
1839 | |
1840 | do { |
1841 | err = perf_session__peek_event(session, file_offset: offset, buf, |
1842 | PERF_SAMPLE_MAX_SIZE, event_ptr: &event, |
1843 | NULL); |
1844 | if (err) |
1845 | return err; |
1846 | |
1847 | err = cb(session, event, offset, data); |
1848 | if (err) |
1849 | return err; |
1850 | |
1851 | offset += event->header.size; |
1852 | if (event->header.type == PERF_RECORD_AUXTRACE) |
1853 | offset += event->auxtrace.size; |
1854 | |
1855 | } while (offset < max_offset); |
1856 | |
1857 | return err; |
1858 | } |
1859 | |
1860 | static s64 perf_session__process_event(struct perf_session *session, |
1861 | union perf_event *event, u64 file_offset, |
1862 | const char *file_path) |
1863 | { |
1864 | struct evlist *evlist = session->evlist; |
1865 | struct perf_tool *tool = session->tool; |
1866 | int ret; |
1867 | |
1868 | if (session->header.needs_swap) |
1869 | event_swap(event, sample_id_all: evlist__sample_id_all(evlist)); |
1870 | |
1871 | if (event->header.type >= PERF_RECORD_HEADER_MAX) |
1872 | return -EINVAL; |
1873 | |
1874 | events_stats__inc(stats: &evlist->stats, type: event->header.type); |
1875 | |
1876 | if (event->header.type >= PERF_RECORD_USER_TYPE_START) |
1877 | return perf_session__process_user_event(session, event, file_offset, file_path); |
1878 | |
1879 | if (tool->ordered_events) { |
1880 | u64 timestamp = -1ULL; |
1881 | |
1882 | ret = evlist__parse_sample_timestamp(evlist, event, timestamp: ×tamp); |
1883 | if (ret && ret != -1) |
1884 | return ret; |
1885 | |
1886 | ret = perf_session__queue_event(s: session, event, timestamp, file_offset, file_path); |
1887 | if (ret != -ETIME) |
1888 | return ret; |
1889 | } |
1890 | |
1891 | return perf_session__deliver_event(session, event, tool, file_offset, file_path); |
1892 | } |
1893 | |
1894 | void (struct perf_event_header *hdr) |
1895 | { |
1896 | hdr->type = bswap_32(hdr->type); |
1897 | hdr->misc = bswap_16(hdr->misc); |
1898 | hdr->size = bswap_16(hdr->size); |
1899 | } |
1900 | |
1901 | struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) |
1902 | { |
1903 | return machine__findnew_thread(machine: &session->machines.host, pid: -1, tid: pid); |
1904 | } |
1905 | |
1906 | int perf_session__register_idle_thread(struct perf_session *session) |
1907 | { |
1908 | struct thread *thread = machine__idle_thread(machine: &session->machines.host); |
1909 | |
1910 | /* machine__idle_thread() got the thread, so put it */ |
1911 | thread__put(thread); |
1912 | return thread ? 0 : -1; |
1913 | } |
1914 | |
1915 | static void |
1916 | perf_session__warn_order(const struct perf_session *session) |
1917 | { |
1918 | const struct ordered_events *oe = &session->ordered_events; |
1919 | struct evsel *evsel; |
1920 | bool should_warn = true; |
1921 | |
1922 | evlist__for_each_entry(session->evlist, evsel) { |
1923 | if (evsel->core.attr.write_backward) |
1924 | should_warn = false; |
1925 | } |
1926 | |
1927 | if (!should_warn) |
1928 | return; |
1929 | if (oe->nr_unordered_events != 0) |
1930 | ui__warning(format: "%u out of order events recorded.\n" , oe->nr_unordered_events); |
1931 | } |
1932 | |
1933 | static void perf_session__warn_about_errors(const struct perf_session *session) |
1934 | { |
1935 | const struct events_stats *stats = &session->evlist->stats; |
1936 | |
1937 | if (session->tool->lost == perf_event__process_lost && |
1938 | stats->nr_events[PERF_RECORD_LOST] != 0) { |
1939 | ui__warning(format: "Processed %d events and lost %d chunks!\n\n" |
1940 | "Check IO/CPU overload!\n\n" , |
1941 | stats->nr_events[0], |
1942 | stats->nr_events[PERF_RECORD_LOST]); |
1943 | } |
1944 | |
1945 | if (session->tool->lost_samples == perf_event__process_lost_samples) { |
1946 | double drop_rate; |
1947 | |
1948 | drop_rate = (double)stats->total_lost_samples / |
1949 | (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); |
1950 | if (drop_rate > 0.05) { |
1951 | ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n" , |
1952 | stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, |
1953 | drop_rate * 100.0); |
1954 | } |
1955 | } |
1956 | |
1957 | if (session->tool->aux == perf_event__process_aux && |
1958 | stats->total_aux_lost != 0) { |
1959 | ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n" , |
1960 | stats->total_aux_lost, |
1961 | stats->nr_events[PERF_RECORD_AUX]); |
1962 | } |
1963 | |
1964 | if (session->tool->aux == perf_event__process_aux && |
1965 | stats->total_aux_partial != 0) { |
1966 | bool vmm_exclusive = false; |
1967 | |
1968 | (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive" , |
1969 | &vmm_exclusive); |
1970 | |
1971 | ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n" |
1972 | "Are you running a KVM guest in the background?%s\n\n" , |
1973 | stats->total_aux_partial, |
1974 | stats->nr_events[PERF_RECORD_AUX], |
1975 | vmm_exclusive ? |
1976 | "\nReloading kvm_intel module with vmm_exclusive=0\n" |
1977 | "will reduce the gaps to only guest's timeslices." : |
1978 | "" ); |
1979 | } |
1980 | |
1981 | if (session->tool->aux == perf_event__process_aux && |
1982 | stats->total_aux_collision != 0) { |
1983 | ui__warning("AUX data detected collision %" PRIu64 " times out of %u!\n\n" , |
1984 | stats->total_aux_collision, |
1985 | stats->nr_events[PERF_RECORD_AUX]); |
1986 | } |
1987 | |
1988 | if (stats->nr_unknown_events != 0) { |
1989 | ui__warning(format: "Found %u unknown events!\n\n" |
1990 | "Is this an older tool processing a perf.data " |
1991 | "file generated by a more recent tool?\n\n" |
1992 | "If that is not the case, consider " |
1993 | "reporting to linux-kernel@vger.kernel.org.\n\n" , |
1994 | stats->nr_unknown_events); |
1995 | } |
1996 | |
1997 | if (stats->nr_unknown_id != 0) { |
1998 | ui__warning(format: "%u samples with id not present in the header\n" , |
1999 | stats->nr_unknown_id); |
2000 | } |
2001 | |
2002 | if (stats->nr_invalid_chains != 0) { |
2003 | ui__warning(format: "Found invalid callchains!\n\n" |
2004 | "%u out of %u events were discarded for this reason.\n\n" |
2005 | "Consider reporting to linux-kernel@vger.kernel.org.\n\n" , |
2006 | stats->nr_invalid_chains, |
2007 | stats->nr_events[PERF_RECORD_SAMPLE]); |
2008 | } |
2009 | |
2010 | if (stats->nr_unprocessable_samples != 0) { |
2011 | ui__warning(format: "%u unprocessable samples recorded.\n" |
2012 | "Do you have a KVM guest running and not using 'perf kvm'?\n" , |
2013 | stats->nr_unprocessable_samples); |
2014 | } |
2015 | |
2016 | perf_session__warn_order(session); |
2017 | |
2018 | events_stats__auxtrace_error_warn(stats); |
2019 | |
2020 | if (stats->nr_proc_map_timeout != 0) { |
2021 | ui__warning(format: "%d map information files for pre-existing threads were\n" |
2022 | "not processed, if there are samples for addresses they\n" |
2023 | "will not be resolved, you may find out which are these\n" |
2024 | "threads by running with -v and redirecting the output\n" |
2025 | "to a file.\n" |
2026 | "The time limit to process proc map is too short?\n" |
2027 | "Increase it by --proc-map-timeout\n" , |
2028 | stats->nr_proc_map_timeout); |
2029 | } |
2030 | } |
2031 | |
2032 | static int perf_session__flush_thread_stack(struct thread *thread, |
2033 | void *p __maybe_unused) |
2034 | { |
2035 | return thread_stack__flush(thread); |
2036 | } |
2037 | |
2038 | static int perf_session__flush_thread_stacks(struct perf_session *session) |
2039 | { |
2040 | return machines__for_each_thread(machines: &session->machines, |
2041 | fn: perf_session__flush_thread_stack, |
2042 | NULL); |
2043 | } |
2044 | |
2045 | volatile sig_atomic_t session_done; |
2046 | |
2047 | static int __perf_session__process_decomp_events(struct perf_session *session); |
2048 | |
2049 | static int __perf_session__process_pipe_events(struct perf_session *session) |
2050 | { |
2051 | struct ordered_events *oe = &session->ordered_events; |
2052 | struct perf_tool *tool = session->tool; |
2053 | union perf_event *event; |
2054 | uint32_t size, cur_size = 0; |
2055 | void *buf = NULL; |
2056 | s64 skip = 0; |
2057 | u64 head; |
2058 | ssize_t err; |
2059 | void *p; |
2060 | |
2061 | perf_tool__fill_defaults(tool); |
2062 | |
2063 | head = 0; |
2064 | cur_size = sizeof(union perf_event); |
2065 | |
2066 | buf = malloc(cur_size); |
2067 | if (!buf) |
2068 | return -errno; |
2069 | ordered_events__set_copy_on_queue(oe, copy: true); |
2070 | more: |
2071 | event = buf; |
2072 | err = perf_data__read(data: session->data, buf: event, |
2073 | size: sizeof(struct perf_event_header)); |
2074 | if (err <= 0) { |
2075 | if (err == 0) |
2076 | goto done; |
2077 | |
2078 | pr_err("failed to read event header\n" ); |
2079 | goto out_err; |
2080 | } |
2081 | |
2082 | if (session->header.needs_swap) |
2083 | perf_event_header__bswap(hdr: &event->header); |
2084 | |
2085 | size = event->header.size; |
2086 | if (size < sizeof(struct perf_event_header)) { |
2087 | pr_err("bad event header size\n" ); |
2088 | goto out_err; |
2089 | } |
2090 | |
2091 | if (size > cur_size) { |
2092 | void *new = realloc(buf, size); |
2093 | if (!new) { |
2094 | pr_err("failed to allocate memory to read event\n" ); |
2095 | goto out_err; |
2096 | } |
2097 | buf = new; |
2098 | cur_size = size; |
2099 | event = buf; |
2100 | } |
2101 | p = event; |
2102 | p += sizeof(struct perf_event_header); |
2103 | |
2104 | if (size - sizeof(struct perf_event_header)) { |
2105 | err = perf_data__read(data: session->data, buf: p, |
2106 | size: size - sizeof(struct perf_event_header)); |
2107 | if (err <= 0) { |
2108 | if (err == 0) { |
2109 | pr_err("unexpected end of event stream\n" ); |
2110 | goto done; |
2111 | } |
2112 | |
2113 | pr_err("failed to read event data\n" ); |
2114 | goto out_err; |
2115 | } |
2116 | } |
2117 | |
2118 | if ((skip = perf_session__process_event(session, event, file_offset: head, file_path: "pipe" )) < 0) { |
2119 | pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n" , |
2120 | head, event->header.size, event->header.type); |
2121 | err = -EINVAL; |
2122 | goto out_err; |
2123 | } |
2124 | |
2125 | head += size; |
2126 | |
2127 | if (skip > 0) |
2128 | head += skip; |
2129 | |
2130 | err = __perf_session__process_decomp_events(session); |
2131 | if (err) |
2132 | goto out_err; |
2133 | |
2134 | if (!session_done()) |
2135 | goto more; |
2136 | done: |
2137 | /* do the final flush for ordered samples */ |
2138 | err = ordered_events__flush(oe, how: OE_FLUSH__FINAL); |
2139 | if (err) |
2140 | goto out_err; |
2141 | err = auxtrace__flush_events(session, tool); |
2142 | if (err) |
2143 | goto out_err; |
2144 | err = perf_session__flush_thread_stacks(session); |
2145 | out_err: |
2146 | free(buf); |
2147 | if (!tool->no_warn) |
2148 | perf_session__warn_about_errors(session); |
2149 | ordered_events__free(oe: &session->ordered_events); |
2150 | auxtrace__free_events(session); |
2151 | return err; |
2152 | } |
2153 | |
2154 | static union perf_event * |
2155 | prefetch_event(char *buf, u64 head, size_t mmap_size, |
2156 | bool needs_swap, union perf_event *error) |
2157 | { |
2158 | union perf_event *event; |
2159 | u16 event_size; |
2160 | |
2161 | /* |
2162 | * Ensure we have enough space remaining to read |
2163 | * the size of the event in the headers. |
2164 | */ |
2165 | if (head + sizeof(event->header) > mmap_size) |
2166 | return NULL; |
2167 | |
2168 | event = (union perf_event *)(buf + head); |
2169 | if (needs_swap) |
2170 | perf_event_header__bswap(hdr: &event->header); |
2171 | |
2172 | event_size = event->header.size; |
2173 | if (head + event_size <= mmap_size) |
2174 | return event; |
2175 | |
2176 | /* We're not fetching the event so swap back again */ |
2177 | if (needs_swap) |
2178 | perf_event_header__bswap(hdr: &event->header); |
2179 | |
2180 | /* Check if the event fits into the next mmapped buf. */ |
2181 | if (event_size <= mmap_size - head % page_size) { |
2182 | /* Remap buf and fetch again. */ |
2183 | return NULL; |
2184 | } |
2185 | |
2186 | /* Invalid input. Event size should never exceed mmap_size. */ |
2187 | pr_debug("%s: head=%#" PRIx64 " event->header.size=%#x, mmap_size=%#zx:" |
2188 | " fuzzed or compressed perf.data?\n" , __func__, head, event_size, mmap_size); |
2189 | |
2190 | return error; |
2191 | } |
2192 | |
2193 | static union perf_event * |
2194 | fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap) |
2195 | { |
2196 | return prefetch_event(buf, head, mmap_size, needs_swap, error: ERR_PTR(error: -EINVAL)); |
2197 | } |
2198 | |
2199 | static union perf_event * |
2200 | fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap) |
2201 | { |
2202 | return prefetch_event(buf, head, mmap_size, needs_swap, NULL); |
2203 | } |
2204 | |
2205 | static int __perf_session__process_decomp_events(struct perf_session *session) |
2206 | { |
2207 | s64 skip; |
2208 | u64 size; |
2209 | struct decomp *decomp = session->active_decomp->decomp_last; |
2210 | |
2211 | if (!decomp) |
2212 | return 0; |
2213 | |
2214 | while (decomp->head < decomp->size && !session_done()) { |
2215 | union perf_event *event = fetch_decomp_event(head: decomp->head, mmap_size: decomp->size, buf: decomp->data, |
2216 | needs_swap: session->header.needs_swap); |
2217 | |
2218 | if (!event) |
2219 | break; |
2220 | |
2221 | size = event->header.size; |
2222 | |
2223 | if (size < sizeof(struct perf_event_header) || |
2224 | (skip = perf_session__process_event(session, event, file_offset: decomp->file_pos, |
2225 | file_path: decomp->file_path)) < 0) { |
2226 | pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n" , |
2227 | decomp->file_pos + decomp->head, event->header.size, event->header.type); |
2228 | return -EINVAL; |
2229 | } |
2230 | |
2231 | if (skip) |
2232 | size += skip; |
2233 | |
2234 | decomp->head += size; |
2235 | } |
2236 | |
2237 | return 0; |
2238 | } |
2239 | |
2240 | /* |
2241 | * On 64bit we can mmap the data file in one go. No need for tiny mmap |
2242 | * slices. On 32bit we use 32MB. |
2243 | */ |
2244 | #if BITS_PER_LONG == 64 |
2245 | #define MMAP_SIZE ULLONG_MAX |
2246 | #define NUM_MMAPS 1 |
2247 | #else |
2248 | #define MMAP_SIZE (32 * 1024 * 1024ULL) |
2249 | #define NUM_MMAPS 128 |
2250 | #endif |
2251 | |
2252 | struct reader; |
2253 | |
2254 | typedef s64 (*reader_cb_t)(struct perf_session *session, |
2255 | union perf_event *event, |
2256 | u64 file_offset, |
2257 | const char *file_path); |
2258 | |
2259 | struct reader { |
2260 | int fd; |
2261 | const char *path; |
2262 | u64 data_size; |
2263 | u64 data_offset; |
2264 | reader_cb_t process; |
2265 | bool in_place_update; |
2266 | char *mmaps[NUM_MMAPS]; |
2267 | size_t mmap_size; |
2268 | int mmap_idx; |
2269 | char *mmap_cur; |
2270 | u64 file_pos; |
2271 | u64 file_offset; |
2272 | u64 head; |
2273 | u64 size; |
2274 | bool done; |
2275 | struct zstd_data zstd_data; |
2276 | struct decomp_data decomp_data; |
2277 | }; |
2278 | |
2279 | static int |
2280 | reader__init(struct reader *rd, bool *one_mmap) |
2281 | { |
2282 | u64 data_size = rd->data_size; |
2283 | char **mmaps = rd->mmaps; |
2284 | |
2285 | rd->head = rd->data_offset; |
2286 | data_size += rd->data_offset; |
2287 | |
2288 | rd->mmap_size = MMAP_SIZE; |
2289 | if (rd->mmap_size > data_size) { |
2290 | rd->mmap_size = data_size; |
2291 | if (one_mmap) |
2292 | *one_mmap = true; |
2293 | } |
2294 | |
2295 | memset(mmaps, 0, sizeof(rd->mmaps)); |
2296 | |
2297 | if (zstd_init(&rd->zstd_data, 0)) |
2298 | return -1; |
2299 | rd->decomp_data.zstd_decomp = &rd->zstd_data; |
2300 | |
2301 | return 0; |
2302 | } |
2303 | |
2304 | static void |
2305 | reader__release_decomp(struct reader *rd) |
2306 | { |
2307 | perf_decomp__release_events(next: rd->decomp_data.decomp); |
2308 | zstd_fini(&rd->zstd_data); |
2309 | } |
2310 | |
2311 | static int |
2312 | reader__mmap(struct reader *rd, struct perf_session *session) |
2313 | { |
2314 | int mmap_prot, mmap_flags; |
2315 | char *buf, **mmaps = rd->mmaps; |
2316 | u64 page_offset; |
2317 | |
2318 | mmap_prot = PROT_READ; |
2319 | mmap_flags = MAP_SHARED; |
2320 | |
2321 | if (rd->in_place_update) { |
2322 | mmap_prot |= PROT_WRITE; |
2323 | } else if (session->header.needs_swap) { |
2324 | mmap_prot |= PROT_WRITE; |
2325 | mmap_flags = MAP_PRIVATE; |
2326 | } |
2327 | |
2328 | if (mmaps[rd->mmap_idx]) { |
2329 | munmap(mmaps[rd->mmap_idx], rd->mmap_size); |
2330 | mmaps[rd->mmap_idx] = NULL; |
2331 | } |
2332 | |
2333 | page_offset = page_size * (rd->head / page_size); |
2334 | rd->file_offset += page_offset; |
2335 | rd->head -= page_offset; |
2336 | |
2337 | buf = mmap(NULL, rd->mmap_size, mmap_prot, mmap_flags, rd->fd, |
2338 | rd->file_offset); |
2339 | if (buf == MAP_FAILED) { |
2340 | pr_err("failed to mmap file\n" ); |
2341 | return -errno; |
2342 | } |
2343 | mmaps[rd->mmap_idx] = rd->mmap_cur = buf; |
2344 | rd->mmap_idx = (rd->mmap_idx + 1) & (ARRAY_SIZE(rd->mmaps) - 1); |
2345 | rd->file_pos = rd->file_offset + rd->head; |
2346 | if (session->one_mmap) { |
2347 | session->one_mmap_addr = buf; |
2348 | session->one_mmap_offset = rd->file_offset; |
2349 | } |
2350 | |
2351 | return 0; |
2352 | } |
2353 | |
2354 | enum { |
2355 | READER_OK, |
2356 | READER_NODATA, |
2357 | }; |
2358 | |
2359 | static int |
2360 | reader__read_event(struct reader *rd, struct perf_session *session, |
2361 | struct ui_progress *prog) |
2362 | { |
2363 | u64 size; |
2364 | int err = READER_OK; |
2365 | union perf_event *event; |
2366 | s64 skip; |
2367 | |
2368 | event = fetch_mmaped_event(head: rd->head, mmap_size: rd->mmap_size, buf: rd->mmap_cur, |
2369 | needs_swap: session->header.needs_swap); |
2370 | if (IS_ERR(ptr: event)) |
2371 | return PTR_ERR(ptr: event); |
2372 | |
2373 | if (!event) |
2374 | return READER_NODATA; |
2375 | |
2376 | size = event->header.size; |
2377 | |
2378 | skip = -EINVAL; |
2379 | |
2380 | if (size < sizeof(struct perf_event_header) || |
2381 | (skip = rd->process(session, event, rd->file_pos, rd->path)) < 0) { |
2382 | pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n" , |
2383 | rd->file_offset + rd->head, event->header.size, |
2384 | event->header.type, strerror(-skip)); |
2385 | err = skip; |
2386 | goto out; |
2387 | } |
2388 | |
2389 | if (skip) |
2390 | size += skip; |
2391 | |
2392 | rd->size += size; |
2393 | rd->head += size; |
2394 | rd->file_pos += size; |
2395 | |
2396 | err = __perf_session__process_decomp_events(session); |
2397 | if (err) |
2398 | goto out; |
2399 | |
2400 | ui_progress__update(prog, size); |
2401 | |
2402 | out: |
2403 | return err; |
2404 | } |
2405 | |
2406 | static inline bool |
2407 | reader__eof(struct reader *rd) |
2408 | { |
2409 | return (rd->file_pos >= rd->data_size + rd->data_offset); |
2410 | } |
2411 | |
2412 | static int |
2413 | reader__process_events(struct reader *rd, struct perf_session *session, |
2414 | struct ui_progress *prog) |
2415 | { |
2416 | int err; |
2417 | |
2418 | err = reader__init(rd, one_mmap: &session->one_mmap); |
2419 | if (err) |
2420 | goto out; |
2421 | |
2422 | session->active_decomp = &rd->decomp_data; |
2423 | |
2424 | remap: |
2425 | err = reader__mmap(rd, session); |
2426 | if (err) |
2427 | goto out; |
2428 | |
2429 | more: |
2430 | err = reader__read_event(rd, session, prog); |
2431 | if (err < 0) |
2432 | goto out; |
2433 | else if (err == READER_NODATA) |
2434 | goto remap; |
2435 | |
2436 | if (session_done()) |
2437 | goto out; |
2438 | |
2439 | if (!reader__eof(rd)) |
2440 | goto more; |
2441 | |
2442 | out: |
2443 | session->active_decomp = &session->decomp_data; |
2444 | return err; |
2445 | } |
2446 | |
2447 | static s64 process_simple(struct perf_session *session, |
2448 | union perf_event *event, |
2449 | u64 file_offset, |
2450 | const char *file_path) |
2451 | { |
2452 | return perf_session__process_event(session, event, file_offset, file_path); |
2453 | } |
2454 | |
2455 | static int __perf_session__process_events(struct perf_session *session) |
2456 | { |
2457 | struct reader rd = { |
2458 | .fd = perf_data__fd(data: session->data), |
2459 | .path = session->data->file.path, |
2460 | .data_size = session->header.data_size, |
2461 | .data_offset = session->header.data_offset, |
2462 | .process = process_simple, |
2463 | .in_place_update = session->data->in_place_update, |
2464 | }; |
2465 | struct ordered_events *oe = &session->ordered_events; |
2466 | struct perf_tool *tool = session->tool; |
2467 | struct ui_progress prog; |
2468 | int err; |
2469 | |
2470 | perf_tool__fill_defaults(tool); |
2471 | |
2472 | if (rd.data_size == 0) |
2473 | return -1; |
2474 | |
2475 | ui_progress__init_size(&prog, rd.data_size, "Processing events..." ); |
2476 | |
2477 | err = reader__process_events(rd: &rd, session, prog: &prog); |
2478 | if (err) |
2479 | goto out_err; |
2480 | /* do the final flush for ordered samples */ |
2481 | err = ordered_events__flush(oe, how: OE_FLUSH__FINAL); |
2482 | if (err) |
2483 | goto out_err; |
2484 | err = auxtrace__flush_events(session, tool); |
2485 | if (err) |
2486 | goto out_err; |
2487 | err = perf_session__flush_thread_stacks(session); |
2488 | out_err: |
2489 | ui_progress__finish(); |
2490 | if (!tool->no_warn) |
2491 | perf_session__warn_about_errors(session); |
2492 | /* |
2493 | * We may switching perf.data output, make ordered_events |
2494 | * reusable. |
2495 | */ |
2496 | ordered_events__reinit(oe: &session->ordered_events); |
2497 | auxtrace__free_events(session); |
2498 | reader__release_decomp(rd: &rd); |
2499 | session->one_mmap = false; |
2500 | return err; |
2501 | } |
2502 | |
2503 | /* |
2504 | * Processing 2 MB of data from each reader in sequence, |
2505 | * because that's the way the ordered events sorting works |
2506 | * most efficiently. |
2507 | */ |
2508 | #define READER_MAX_SIZE (2 * 1024 * 1024) |
2509 | |
2510 | /* |
2511 | * This function reads, merge and process directory data. |
2512 | * It assumens the version 1 of directory data, where each |
2513 | * data file holds per-cpu data, already sorted by kernel. |
2514 | */ |
2515 | static int __perf_session__process_dir_events(struct perf_session *session) |
2516 | { |
2517 | struct perf_data *data = session->data; |
2518 | struct perf_tool *tool = session->tool; |
2519 | int i, ret, readers, nr_readers; |
2520 | struct ui_progress prog; |
2521 | u64 total_size = perf_data__size(data: session->data); |
2522 | struct reader *rd; |
2523 | |
2524 | perf_tool__fill_defaults(tool); |
2525 | |
2526 | ui_progress__init_size(&prog, total_size, "Sorting events..." ); |
2527 | |
2528 | nr_readers = 1; |
2529 | for (i = 0; i < data->dir.nr; i++) { |
2530 | if (data->dir.files[i].size) |
2531 | nr_readers++; |
2532 | } |
2533 | |
2534 | rd = zalloc(nr_readers * sizeof(struct reader)); |
2535 | if (!rd) |
2536 | return -ENOMEM; |
2537 | |
2538 | rd[0] = (struct reader) { |
2539 | .fd = perf_data__fd(session->data), |
2540 | .path = session->data->file.path, |
2541 | .data_size = session->header.data_size, |
2542 | .data_offset = session->header.data_offset, |
2543 | .process = process_simple, |
2544 | .in_place_update = session->data->in_place_update, |
2545 | }; |
2546 | ret = reader__init(rd: &rd[0], NULL); |
2547 | if (ret) |
2548 | goto out_err; |
2549 | ret = reader__mmap(rd: &rd[0], session); |
2550 | if (ret) |
2551 | goto out_err; |
2552 | readers = 1; |
2553 | |
2554 | for (i = 0; i < data->dir.nr; i++) { |
2555 | if (!data->dir.files[i].size) |
2556 | continue; |
2557 | rd[readers] = (struct reader) { |
2558 | .fd = data->dir.files[i].fd, |
2559 | .path = data->dir.files[i].path, |
2560 | .data_size = data->dir.files[i].size, |
2561 | .data_offset = 0, |
2562 | .process = process_simple, |
2563 | .in_place_update = session->data->in_place_update, |
2564 | }; |
2565 | ret = reader__init(rd: &rd[readers], NULL); |
2566 | if (ret) |
2567 | goto out_err; |
2568 | ret = reader__mmap(rd: &rd[readers], session); |
2569 | if (ret) |
2570 | goto out_err; |
2571 | readers++; |
2572 | } |
2573 | |
2574 | i = 0; |
2575 | while (readers) { |
2576 | if (session_done()) |
2577 | break; |
2578 | |
2579 | if (rd[i].done) { |
2580 | i = (i + 1) % nr_readers; |
2581 | continue; |
2582 | } |
2583 | if (reader__eof(rd: &rd[i])) { |
2584 | rd[i].done = true; |
2585 | readers--; |
2586 | continue; |
2587 | } |
2588 | |
2589 | session->active_decomp = &rd[i].decomp_data; |
2590 | ret = reader__read_event(rd: &rd[i], session, prog: &prog); |
2591 | if (ret < 0) { |
2592 | goto out_err; |
2593 | } else if (ret == READER_NODATA) { |
2594 | ret = reader__mmap(rd: &rd[i], session); |
2595 | if (ret) |
2596 | goto out_err; |
2597 | } |
2598 | |
2599 | if (rd[i].size >= READER_MAX_SIZE) { |
2600 | rd[i].size = 0; |
2601 | i = (i + 1) % nr_readers; |
2602 | } |
2603 | } |
2604 | |
2605 | ret = ordered_events__flush(oe: &session->ordered_events, how: OE_FLUSH__FINAL); |
2606 | if (ret) |
2607 | goto out_err; |
2608 | |
2609 | ret = perf_session__flush_thread_stacks(session); |
2610 | out_err: |
2611 | ui_progress__finish(); |
2612 | |
2613 | if (!tool->no_warn) |
2614 | perf_session__warn_about_errors(session); |
2615 | |
2616 | /* |
2617 | * We may switching perf.data output, make ordered_events |
2618 | * reusable. |
2619 | */ |
2620 | ordered_events__reinit(oe: &session->ordered_events); |
2621 | |
2622 | session->one_mmap = false; |
2623 | |
2624 | session->active_decomp = &session->decomp_data; |
2625 | for (i = 0; i < nr_readers; i++) |
2626 | reader__release_decomp(rd: &rd[i]); |
2627 | zfree(&rd); |
2628 | |
2629 | return ret; |
2630 | } |
2631 | |
2632 | int perf_session__process_events(struct perf_session *session) |
2633 | { |
2634 | if (perf_session__register_idle_thread(session) < 0) |
2635 | return -ENOMEM; |
2636 | |
2637 | if (perf_data__is_pipe(data: session->data)) |
2638 | return __perf_session__process_pipe_events(session); |
2639 | |
2640 | if (perf_data__is_dir(data: session->data) && session->data->dir.nr) |
2641 | return __perf_session__process_dir_events(session); |
2642 | |
2643 | return __perf_session__process_events(session); |
2644 | } |
2645 | |
2646 | bool perf_session__has_traces(struct perf_session *session, const char *msg) |
2647 | { |
2648 | struct evsel *evsel; |
2649 | |
2650 | evlist__for_each_entry(session->evlist, evsel) { |
2651 | if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) |
2652 | return true; |
2653 | } |
2654 | |
2655 | pr_err("No trace sample to read. Did you call 'perf %s'?\n" , msg); |
2656 | return false; |
2657 | } |
2658 | |
2659 | int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr) |
2660 | { |
2661 | char *bracket; |
2662 | struct ref_reloc_sym *ref; |
2663 | struct kmap *kmap; |
2664 | |
2665 | ref = zalloc(sizeof(struct ref_reloc_sym)); |
2666 | if (ref == NULL) |
2667 | return -ENOMEM; |
2668 | |
2669 | ref->name = strdup(symbol_name); |
2670 | if (ref->name == NULL) { |
2671 | free(ref); |
2672 | return -ENOMEM; |
2673 | } |
2674 | |
2675 | bracket = strchr(ref->name, ']'); |
2676 | if (bracket) |
2677 | *bracket = '\0'; |
2678 | |
2679 | ref->addr = addr; |
2680 | |
2681 | kmap = map__kmap(map); |
2682 | if (kmap) |
2683 | kmap->ref_reloc_sym = ref; |
2684 | |
2685 | return 0; |
2686 | } |
2687 | |
2688 | size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) |
2689 | { |
2690 | return machines__fprintf_dsos(&session->machines, fp); |
2691 | } |
2692 | |
2693 | size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, |
2694 | bool (skip)(struct dso *dso, int parm), int parm) |
2695 | { |
2696 | return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); |
2697 | } |
2698 | |
2699 | size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp, |
2700 | bool skip_empty) |
2701 | { |
2702 | size_t ret; |
2703 | const char *msg = "" ; |
2704 | |
2705 | if (perf_header__has_feat(header: &session->header, feat: HEADER_AUXTRACE)) |
2706 | msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)" ; |
2707 | |
2708 | ret = fprintf(fp, "\nAggregated stats:%s\n" , msg); |
2709 | |
2710 | ret += events_stats__fprintf(&session->evlist->stats, fp, skip_empty); |
2711 | return ret; |
2712 | } |
2713 | |
2714 | size_t perf_session__fprintf(struct perf_session *session, FILE *fp) |
2715 | { |
2716 | /* |
2717 | * FIXME: Here we have to actually print all the machines in this |
2718 | * session, not just the host... |
2719 | */ |
2720 | return machine__fprintf(&session->machines.host, fp); |
2721 | } |
2722 | |
2723 | void perf_session__dump_kmaps(struct perf_session *session) |
2724 | { |
2725 | int save_verbose = verbose; |
2726 | |
2727 | fflush(stdout); |
2728 | fprintf(stderr, "Kernel and module maps:\n" ); |
2729 | verbose = 0; /* Suppress verbose to print a summary only */ |
2730 | maps__fprintf(machine__kernel_maps(&session->machines.host), stderr); |
2731 | verbose = save_verbose; |
2732 | } |
2733 | |
2734 | struct evsel *perf_session__find_first_evtype(struct perf_session *session, |
2735 | unsigned int type) |
2736 | { |
2737 | struct evsel *pos; |
2738 | |
2739 | evlist__for_each_entry(session->evlist, pos) { |
2740 | if (pos->core.attr.type == type) |
2741 | return pos; |
2742 | } |
2743 | return NULL; |
2744 | } |
2745 | |
2746 | int perf_session__cpu_bitmap(struct perf_session *session, |
2747 | const char *cpu_list, unsigned long *cpu_bitmap) |
2748 | { |
2749 | int i, err = -1; |
2750 | struct perf_cpu_map *map; |
2751 | int nr_cpus = min(session->header.env.nr_cpus_avail, MAX_NR_CPUS); |
2752 | |
2753 | for (i = 0; i < PERF_TYPE_MAX; ++i) { |
2754 | struct evsel *evsel; |
2755 | |
2756 | evsel = perf_session__find_first_evtype(session, type: i); |
2757 | if (!evsel) |
2758 | continue; |
2759 | |
2760 | if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) { |
2761 | pr_err("File does not contain CPU events. " |
2762 | "Remove -C option to proceed.\n" ); |
2763 | return -1; |
2764 | } |
2765 | } |
2766 | |
2767 | map = perf_cpu_map__new(cpu_list); |
2768 | if (map == NULL) { |
2769 | pr_err("Invalid cpu_list\n" ); |
2770 | return -1; |
2771 | } |
2772 | |
2773 | for (i = 0; i < perf_cpu_map__nr(map); i++) { |
2774 | struct perf_cpu cpu = perf_cpu_map__cpu(map, i); |
2775 | |
2776 | if (cpu.cpu >= nr_cpus) { |
2777 | pr_err("Requested CPU %d too large. " |
2778 | "Consider raising MAX_NR_CPUS\n" , cpu.cpu); |
2779 | goto out_delete_map; |
2780 | } |
2781 | |
2782 | __set_bit(cpu.cpu, cpu_bitmap); |
2783 | } |
2784 | |
2785 | err = 0; |
2786 | |
2787 | out_delete_map: |
2788 | perf_cpu_map__put(map); |
2789 | return err; |
2790 | } |
2791 | |
2792 | void perf_session__fprintf_info(struct perf_session *session, FILE *fp, |
2793 | bool full) |
2794 | { |
2795 | if (session == NULL || fp == NULL) |
2796 | return; |
2797 | |
2798 | fprintf(fp, "# ========\n" ); |
2799 | perf_header__fprintf_info(session, fp, full); |
2800 | fprintf(fp, "# ========\n#\n" ); |
2801 | } |
2802 | |
2803 | static int perf_session__register_guest(struct perf_session *session, pid_t machine_pid) |
2804 | { |
2805 | struct machine *machine = machines__findnew(machines: &session->machines, pid: machine_pid); |
2806 | struct thread *thread; |
2807 | |
2808 | if (!machine) |
2809 | return -ENOMEM; |
2810 | |
2811 | machine->single_address_space = session->machines.host.single_address_space; |
2812 | |
2813 | thread = machine__idle_thread(machine); |
2814 | if (!thread) |
2815 | return -ENOMEM; |
2816 | thread__put(thread); |
2817 | |
2818 | machine->kallsyms_filename = perf_data__guest_kallsyms_name(data: session->data, machine_pid); |
2819 | |
2820 | return 0; |
2821 | } |
2822 | |
2823 | static int perf_session__set_guest_cpu(struct perf_session *session, pid_t pid, |
2824 | pid_t tid, int guest_cpu) |
2825 | { |
2826 | struct machine *machine = &session->machines.host; |
2827 | struct thread *thread = machine__findnew_thread(machine, pid, tid); |
2828 | |
2829 | if (!thread) |
2830 | return -ENOMEM; |
2831 | thread__set_guest_cpu(thread, guest_cpu); |
2832 | thread__put(thread); |
2833 | |
2834 | return 0; |
2835 | } |
2836 | |
2837 | int perf_event__process_id_index(struct perf_session *session, |
2838 | union perf_event *event) |
2839 | { |
2840 | struct evlist *evlist = session->evlist; |
2841 | struct perf_record_id_index *ie = &event->id_index; |
2842 | size_t sz = ie->header.size - sizeof(*ie); |
2843 | size_t i, nr, max_nr; |
2844 | size_t e1_sz = sizeof(struct id_index_entry); |
2845 | size_t e2_sz = sizeof(struct id_index_entry_2); |
2846 | size_t etot_sz = e1_sz + e2_sz; |
2847 | struct id_index_entry_2 *e2; |
2848 | pid_t last_pid = 0; |
2849 | |
2850 | max_nr = sz / e1_sz; |
2851 | nr = ie->nr; |
2852 | if (nr > max_nr) { |
2853 | printf("Too big: nr %zu max_nr %zu\n" , nr, max_nr); |
2854 | return -EINVAL; |
2855 | } |
2856 | |
2857 | if (sz >= nr * etot_sz) { |
2858 | max_nr = sz / etot_sz; |
2859 | if (nr > max_nr) { |
2860 | printf("Too big2: nr %zu max_nr %zu\n" , nr, max_nr); |
2861 | return -EINVAL; |
2862 | } |
2863 | e2 = (void *)ie + sizeof(*ie) + nr * e1_sz; |
2864 | } else { |
2865 | e2 = NULL; |
2866 | } |
2867 | |
2868 | if (dump_trace) |
2869 | fprintf(stdout, " nr: %zu\n" , nr); |
2870 | |
2871 | for (i = 0; i < nr; i++, (e2 ? e2++ : 0)) { |
2872 | struct id_index_entry *e = &ie->entries[i]; |
2873 | struct perf_sample_id *sid; |
2874 | int ret; |
2875 | |
2876 | if (dump_trace) { |
2877 | fprintf(stdout, " ... id: %" PRI_lu64, e->id); |
2878 | fprintf(stdout, " idx: %" PRI_lu64, e->idx); |
2879 | fprintf(stdout, " cpu: %" PRI_ld64, e->cpu); |
2880 | fprintf(stdout, " tid: %" PRI_ld64, e->tid); |
2881 | if (e2) { |
2882 | fprintf(stdout, " machine_pid: %" PRI_ld64, e2->machine_pid); |
2883 | fprintf(stdout, " vcpu: %" PRI_lu64"\n" , e2->vcpu); |
2884 | } else { |
2885 | fprintf(stdout, "\n" ); |
2886 | } |
2887 | } |
2888 | |
2889 | sid = evlist__id2sid(evlist, id: e->id); |
2890 | if (!sid) |
2891 | return -ENOENT; |
2892 | |
2893 | sid->idx = e->idx; |
2894 | sid->cpu.cpu = e->cpu; |
2895 | sid->tid = e->tid; |
2896 | |
2897 | if (!e2) |
2898 | continue; |
2899 | |
2900 | sid->machine_pid = e2->machine_pid; |
2901 | sid->vcpu.cpu = e2->vcpu; |
2902 | |
2903 | if (!sid->machine_pid) |
2904 | continue; |
2905 | |
2906 | if (sid->machine_pid != last_pid) { |
2907 | ret = perf_session__register_guest(session, machine_pid: sid->machine_pid); |
2908 | if (ret) |
2909 | return ret; |
2910 | last_pid = sid->machine_pid; |
2911 | perf_guest = true; |
2912 | } |
2913 | |
2914 | ret = perf_session__set_guest_cpu(session, pid: sid->machine_pid, tid: e->tid, guest_cpu: e2->vcpu); |
2915 | if (ret) |
2916 | return ret; |
2917 | } |
2918 | return 0; |
2919 | } |
2920 | |