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perf tests: Move test__syscall_open_tp_fields into separate object
[linux-2.6.git] / tools / perf / util / event.c
blobca9ca285406a8651a5027edf55bd5c21efa67944
1 #include <linux/types.h>
2 #include "event.h"
3 #include "debug.h"
4 #include "machine.h"
5 #include "sort.h"
6 #include "string.h"
7 #include "strlist.h"
8 #include "thread.h"
9 #include "thread_map.h"
10
11 static const char *perf_event__names[] = {
12 [0] = "TOTAL",
13 [PERF_RECORD_MMAP] = "MMAP",
14 [PERF_RECORD_LOST] = "LOST",
15 [PERF_RECORD_COMM] = "COMM",
16 [PERF_RECORD_EXIT] = "EXIT",
17 [PERF_RECORD_THROTTLE] = "THROTTLE",
18 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
19 [PERF_RECORD_FORK] = "FORK",
20 [PERF_RECORD_READ] = "READ",
21 [PERF_RECORD_SAMPLE] = "SAMPLE",
22 [PERF_RECORD_HEADER_ATTR] = "ATTR",
23 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
24 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
25 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
26 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
27 };
28
29 const char *perf_event__name(unsigned int id)
30 {
31 if (id >= ARRAY_SIZE(perf_event__names))
32 return "INVALID";
33 if (!perf_event__names[id])
34 return "UNKNOWN";
35 return perf_event__names[id];
36 }
37
38 static struct perf_sample synth_sample = {
39 .pid = -1,
40 .tid = -1,
41 .time = -1,
42 .stream_id = -1,
43 .cpu = -1,
44 .period = 1,
45 };
46
47 static pid_t perf_event__get_comm_tgid(pid_t pid, char *comm, size_t len)
48 {
49 char filename[PATH_MAX];
50 char bf[BUFSIZ];
51 FILE *fp;
52 size_t size = 0;
53 pid_t tgid = -1;
54
55 snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
56
57 fp = fopen(filename, "r");
58 if (fp == NULL) {
59 pr_debug("couldn't open %s\n", filename);
60 return 0;
61 }
62
63 while (!comm[0] || (tgid < 0)) {
64 if (fgets(bf, sizeof(bf), fp) == NULL) {
65 pr_warning("couldn't get COMM and pgid, malformed %s\n",
66 filename);
67 break;
68 }
69
70 if (memcmp(bf, "Name:", 5) == 0) {
71 char *name = bf + 5;
72 while (*name && isspace(*name))
73 ++name;
74 size = strlen(name) - 1;
75 if (size >= len)
76 size = len - 1;
77 memcpy(comm, name, size);
78 comm[size] = '\0';
79
80 } else if (memcmp(bf, "Tgid:", 5) == 0) {
81 char *tgids = bf + 5;
82 while (*tgids && isspace(*tgids))
83 ++tgids;
84 tgid = atoi(tgids);
85 }
86 }
87
88 fclose(fp);
89
90 return tgid;
91 }
92
93 static pid_t perf_event__synthesize_comm(struct perf_tool *tool,
94 union perf_event *event, pid_t pid,
95 int full,
96 perf_event__handler_t process,
97 struct machine *machine)
98 {
99 char filename[PATH_MAX];
100 size_t size;
101 DIR *tasks;
102 struct dirent dirent, *next;
103 pid_t tgid;
104
105 memset(&event->comm, 0, sizeof(event->comm));
106
107 tgid = perf_event__get_comm_tgid(pid, event->comm.comm,
108 sizeof(event->comm.comm));
109 if (tgid < 0)
110 goto out;
111
112 event->comm.pid = tgid;
113 event->comm.header.type = PERF_RECORD_COMM;
114
115 size = strlen(event->comm.comm) + 1;
116 size = PERF_ALIGN(size, sizeof(u64));
117 memset(event->comm.comm + size, 0, machine->id_hdr_size);
118 event->comm.header.size = (sizeof(event->comm) -
119 (sizeof(event->comm.comm) - size) +
120 machine->id_hdr_size);
121 if (!full) {
122 event->comm.tid = pid;
123
124 if (process(tool, event, &synth_sample, machine) != 0)
125 return -1;
126
127 goto out;
128 }
129
130 snprintf(filename, sizeof(filename), "/proc/%d/task", pid);
131
132 tasks = opendir(filename);
133 if (tasks == NULL) {
134 pr_debug("couldn't open %s\n", filename);
135 return 0;
136 }
137
138 while (!readdir_r(tasks, &dirent, &next) && next) {
139 char *end;
140 pid = strtol(dirent.d_name, &end, 10);
141 if (*end)
142 continue;
143
144 /* already have tgid; jut want to update the comm */
145 (void) perf_event__get_comm_tgid(pid, event->comm.comm,
146 sizeof(event->comm.comm));
147
148 size = strlen(event->comm.comm) + 1;
149 size = PERF_ALIGN(size, sizeof(u64));
150 memset(event->comm.comm + size, 0, machine->id_hdr_size);
151 event->comm.header.size = (sizeof(event->comm) -
152 (sizeof(event->comm.comm) - size) +
153 machine->id_hdr_size);
154
155 event->comm.tid = pid;
156
157 if (process(tool, event, &synth_sample, machine) != 0) {
158 tgid = -1;
159 break;
160 }
161 }
162
163 closedir(tasks);
164 out:
165 return tgid;
166 }
167
168 static int perf_event__synthesize_mmap_events(struct perf_tool *tool,
169 union perf_event *event,
170 pid_t pid, pid_t tgid,
171 perf_event__handler_t process,
172 struct machine *machine)
173 {
174 char filename[PATH_MAX];
175 FILE *fp;
176 int rc = 0;
177
178 snprintf(filename, sizeof(filename), "/proc/%d/maps", pid);
179
180 fp = fopen(filename, "r");
181 if (fp == NULL) {
182 /*
183 * We raced with a task exiting - just return:
184 */
185 pr_debug("couldn't open %s\n", filename);
186 return -1;
187 }
188
189 event->header.type = PERF_RECORD_MMAP;
190 /*
191 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
192 */
193 event->header.misc = PERF_RECORD_MISC_USER;
194
195 while (1) {
196 char bf[BUFSIZ], *pbf = bf;
197 int n;
198 size_t size;
199 if (fgets(bf, sizeof(bf), fp) == NULL)
200 break;
201
202 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
203 n = hex2u64(pbf, &event->mmap.start);
204 if (n < 0)
205 continue;
206 pbf += n + 1;
207 n = hex2u64(pbf, &event->mmap.len);
208 if (n < 0)
209 continue;
210 pbf += n + 3;
211 if (*pbf == 'x') { /* vm_exec */
212 char anonstr[] = "//anon\n";
213 char *execname = strchr(bf, '/');
214
215 /* Catch VDSO */
216 if (execname == NULL)
217 execname = strstr(bf, "[vdso]");
218
219 /* Catch anonymous mmaps */
220 if ((execname == NULL) && !strstr(bf, "["))
221 execname = anonstr;
222
223 if (execname == NULL)
224 continue;
225
226 pbf += 3;
227 n = hex2u64(pbf, &event->mmap.pgoff);
228
229 size = strlen(execname);
230 execname[size - 1] = '\0'; /* Remove \n */
231 memcpy(event->mmap.filename, execname, size);
232 size = PERF_ALIGN(size, sizeof(u64));
233 event->mmap.len -= event->mmap.start;
234 event->mmap.header.size = (sizeof(event->mmap) -
235 (sizeof(event->mmap.filename) - size));
236 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
237 event->mmap.header.size += machine->id_hdr_size;
238 event->mmap.pid = tgid;
239 event->mmap.tid = pid;
240
241 if (process(tool, event, &synth_sample, machine) != 0) {
242 rc = -1;
243 break;
244 }
245 }
246 }
247
248 fclose(fp);
249 return rc;
250 }
251
252 int perf_event__synthesize_modules(struct perf_tool *tool,
253 perf_event__handler_t process,
254 struct machine *machine)
255 {
256 int rc = 0;
257 struct rb_node *nd;
258 struct map_groups *kmaps = &machine->kmaps;
259 union perf_event *event = zalloc((sizeof(event->mmap) +
260 machine->id_hdr_size));
261 if (event == NULL) {
262 pr_debug("Not enough memory synthesizing mmap event "
263 "for kernel modules\n");
264 return -1;
265 }
266
267 event->header.type = PERF_RECORD_MMAP;
268
269 /*
270 * kernel uses 0 for user space maps, see kernel/perf_event.c
271 * __perf_event_mmap
272 */
273 if (machine__is_host(machine))
274 event->header.misc = PERF_RECORD_MISC_KERNEL;
275 else
276 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
277
278 for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
279 nd; nd = rb_next(nd)) {
280 size_t size;
281 struct map *pos = rb_entry(nd, struct map, rb_node);
282
283 if (pos->dso->kernel)
284 continue;
285
286 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
287 event->mmap.header.type = PERF_RECORD_MMAP;
288 event->mmap.header.size = (sizeof(event->mmap) -
289 (sizeof(event->mmap.filename) - size));
290 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
291 event->mmap.header.size += machine->id_hdr_size;
292 event->mmap.start = pos->start;
293 event->mmap.len = pos->end - pos->start;
294 event->mmap.pid = machine->pid;
295
296 memcpy(event->mmap.filename, pos->dso->long_name,
297 pos->dso->long_name_len + 1);
298 if (process(tool, event, &synth_sample, machine) != 0) {
299 rc = -1;
300 break;
301 }
302 }
303
304 free(event);
305 return rc;
306 }
307
308 static int __event__synthesize_thread(union perf_event *comm_event,
309 union perf_event *mmap_event,
310 pid_t pid, int full,
311 perf_event__handler_t process,
312 struct perf_tool *tool,
313 struct machine *machine)
314 {
315 pid_t tgid = perf_event__synthesize_comm(tool, comm_event, pid, full,
316 process, machine);
317 if (tgid == -1)
318 return -1;
319 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
320 process, machine);
321 }
322
323 int perf_event__synthesize_thread_map(struct perf_tool *tool,
324 struct thread_map *threads,
325 perf_event__handler_t process,
326 struct machine *machine)
327 {
328 union perf_event *comm_event, *mmap_event;
329 int err = -1, thread, j;
330
331 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
332 if (comm_event == NULL)
333 goto out;
334
335 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
336 if (mmap_event == NULL)
337 goto out_free_comm;
338
339 err = 0;
340 for (thread = 0; thread < threads->nr; ++thread) {
341 if (__event__synthesize_thread(comm_event, mmap_event,
342 threads->map[thread], 0,
343 process, tool, machine)) {
344 err = -1;
345 break;
346 }
347
348 /*
349 * comm.pid is set to thread group id by
350 * perf_event__synthesize_comm
351 */
352 if ((int) comm_event->comm.pid != threads->map[thread]) {
353 bool need_leader = true;
354
355 /* is thread group leader in thread_map? */
356 for (j = 0; j < threads->nr; ++j) {
357 if ((int) comm_event->comm.pid == threads->map[j]) {
358 need_leader = false;
359 break;
360 }
361 }
362
363 /* if not, generate events for it */
364 if (need_leader &&
365 __event__synthesize_thread(comm_event,
366 mmap_event,
367 comm_event->comm.pid, 0,
368 process, tool, machine)) {
369 err = -1;
370 break;
371 }
372 }
373 }
374 free(mmap_event);
375 out_free_comm:
376 free(comm_event);
377 out:
378 return err;
379 }
380
381 int perf_event__synthesize_threads(struct perf_tool *tool,
382 perf_event__handler_t process,
383 struct machine *machine)
384 {
385 DIR *proc;
386 struct dirent dirent, *next;
387 union perf_event *comm_event, *mmap_event;
388 int err = -1;
389
390 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
391 if (comm_event == NULL)
392 goto out;
393
394 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
395 if (mmap_event == NULL)
396 goto out_free_comm;
397
398 proc = opendir("/proc");
399 if (proc == NULL)
400 goto out_free_mmap;
401
402 while (!readdir_r(proc, &dirent, &next) && next) {
403 char *end;
404 pid_t pid = strtol(dirent.d_name, &end, 10);
405
406 if (*end) /* only interested in proper numerical dirents */
407 continue;
408 /*
409 * We may race with exiting thread, so don't stop just because
410 * one thread couldn't be synthesized.
411 */
412 __event__synthesize_thread(comm_event, mmap_event, pid, 1,
413 process, tool, machine);
414 }
415
416 err = 0;
417 closedir(proc);
418 out_free_mmap:
419 free(mmap_event);
420 out_free_comm:
421 free(comm_event);
422 out:
423 return err;
424 }
425
426 struct process_symbol_args {
427 const char *name;
428 u64 start;
429 };
430
431 static int find_symbol_cb(void *arg, const char *name, char type,
432 u64 start)
433 {
434 struct process_symbol_args *args = arg;
435
436 /*
437 * Must be a function or at least an alias, as in PARISC64, where "_text" is
438 * an 'A' to the same address as "_stext".
439 */
440 if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
441 type == 'A') || strcmp(name, args->name))
442 return 0;
443
444 args->start = start;
445 return 1;
446 }
447
448 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
449 perf_event__handler_t process,
450 struct machine *machine,
451 const char *symbol_name)
452 {
453 size_t size;
454 const char *filename, *mmap_name;
455 char path[PATH_MAX];
456 char name_buff[PATH_MAX];
457 struct map *map;
458 int err;
459 /*
460 * We should get this from /sys/kernel/sections/.text, but till that is
461 * available use this, and after it is use this as a fallback for older
462 * kernels.
463 */
464 struct process_symbol_args args = { .name = symbol_name, };
465 union perf_event *event = zalloc((sizeof(event->mmap) +
466 machine->id_hdr_size));
467 if (event == NULL) {
468 pr_debug("Not enough memory synthesizing mmap event "
469 "for kernel modules\n");
470 return -1;
471 }
472
473 mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
474 if (machine__is_host(machine)) {
475 /*
476 * kernel uses PERF_RECORD_MISC_USER for user space maps,
477 * see kernel/perf_event.c __perf_event_mmap
478 */
479 event->header.misc = PERF_RECORD_MISC_KERNEL;
480 filename = "/proc/kallsyms";
481 } else {
482 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
483 if (machine__is_default_guest(machine))
484 filename = (char *) symbol_conf.default_guest_kallsyms;
485 else {
486 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
487 filename = path;
488 }
489 }
490
491 if (kallsyms__parse(filename, &args, find_symbol_cb) <= 0)
492 return -ENOENT;
493
494 map = machine->vmlinux_maps[MAP__FUNCTION];
495 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
496 "%s%s", mmap_name, symbol_name) + 1;
497 size = PERF_ALIGN(size, sizeof(u64));
498 event->mmap.header.type = PERF_RECORD_MMAP;
499 event->mmap.header.size = (sizeof(event->mmap) -
500 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
501 event->mmap.pgoff = args.start;
502 event->mmap.start = map->start;
503 event->mmap.len = map->end - event->mmap.start;
504 event->mmap.pid = machine->pid;
505
506 err = process(tool, event, &synth_sample, machine);
507 free(event);
508
509 return err;
510 }
511
512 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
513 {
514 return fprintf(fp, ": %s:%d\n", event->comm.comm, event->comm.tid);
515 }
516
517 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
518 union perf_event *event,
519 struct perf_sample *sample __maybe_unused,
520 struct machine *machine)
521 {
522 return machine__process_comm_event(machine, event);
523 }
524
525 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
526 union perf_event *event,
527 struct perf_sample *sample __maybe_unused,
528 struct machine *machine)
529 {
530 return machine__process_lost_event(machine, event);
531 }
532
533 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
534 {
535 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %s\n",
536 event->mmap.pid, event->mmap.tid, event->mmap.start,
537 event->mmap.len, event->mmap.pgoff, event->mmap.filename);
538 }
539
540 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
541 union perf_event *event,
542 struct perf_sample *sample __maybe_unused,
543 struct machine *machine)
544 {
545 return machine__process_mmap_event(machine, event);
546 }
547
548 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
549 {
550 return fprintf(fp, "(%d:%d):(%d:%d)\n",
551 event->fork.pid, event->fork.tid,
552 event->fork.ppid, event->fork.ptid);
553 }
554
555 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
556 union perf_event *event,
557 struct perf_sample *sample __maybe_unused,
558 struct machine *machine)
559 {
560 return machine__process_fork_event(machine, event);
561 }
562
563 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
564 union perf_event *event,
565 struct perf_sample *sample __maybe_unused,
566 struct machine *machine)
567 {
568 return machine__process_exit_event(machine, event);
569 }
570
571 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
572 {
573 size_t ret = fprintf(fp, "PERF_RECORD_%s",
574 perf_event__name(event->header.type));
575
576 switch (event->header.type) {
577 case PERF_RECORD_COMM:
578 ret += perf_event__fprintf_comm(event, fp);
579 break;
580 case PERF_RECORD_FORK:
581 case PERF_RECORD_EXIT:
582 ret += perf_event__fprintf_task(event, fp);
583 break;
584 case PERF_RECORD_MMAP:
585 ret += perf_event__fprintf_mmap(event, fp);
586 break;
587 default:
588 ret += fprintf(fp, "\n");
589 }
590
591 return ret;
592 }
593
594 int perf_event__process(struct perf_tool *tool __maybe_unused,
595 union perf_event *event,
596 struct perf_sample *sample __maybe_unused,
597 struct machine *machine)
598 {
599 return machine__process_event(machine, event);
600 }
601
602 void thread__find_addr_map(struct thread *self,
603 struct machine *machine, u8 cpumode,
604 enum map_type type, u64 addr,
605 struct addr_location *al)
606 {
607 struct map_groups *mg = &self->mg;
608
609 al->thread = self;
610 al->addr = addr;
611 al->cpumode = cpumode;
612 al->filtered = false;
613
614 if (machine == NULL) {
615 al->map = NULL;
616 return;
617 }
618
619 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
620 al->level = 'k';
621 mg = &machine->kmaps;
622 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
623 al->level = '.';
624 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
625 al->level = 'g';
626 mg = &machine->kmaps;
627 } else {
628 /*
629 * 'u' means guest os user space.
630 * TODO: We don't support guest user space. Might support late.
631 */
632 if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest)
633 al->level = 'u';
634 else
635 al->level = 'H';
636 al->map = NULL;
637
638 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
639 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
640 !perf_guest)
641 al->filtered = true;
642 if ((cpumode == PERF_RECORD_MISC_USER ||
643 cpumode == PERF_RECORD_MISC_KERNEL) &&
644 !perf_host)
645 al->filtered = true;
646
647 return;
648 }
649 try_again:
650 al->map = map_groups__find(mg, type, al->addr);
651 if (al->map == NULL) {
652 /*
653 * If this is outside of all known maps, and is a negative
654 * address, try to look it up in the kernel dso, as it might be
655 * a vsyscall or vdso (which executes in user-mode).
656 *
657 * XXX This is nasty, we should have a symbol list in the
658 * "[vdso]" dso, but for now lets use the old trick of looking
659 * in the whole kernel symbol list.
660 */
661 if ((long long)al->addr < 0 &&
662 cpumode == PERF_RECORD_MISC_USER &&
663 machine && mg != &machine->kmaps) {
664 mg = &machine->kmaps;
665 goto try_again;
666 }
667 } else
668 al->addr = al->map->map_ip(al->map, al->addr);
669 }
670
671 void thread__find_addr_location(struct thread *thread, struct machine *machine,
672 u8 cpumode, enum map_type type, u64 addr,
673 struct addr_location *al,
674 symbol_filter_t filter)
675 {
676 thread__find_addr_map(thread, machine, cpumode, type, addr, al);
677 if (al->map != NULL)
678 al->sym = map__find_symbol(al->map, al->addr, filter);
679 else
680 al->sym = NULL;
681 }
682
683 int perf_event__preprocess_sample(const union perf_event *event,
684 struct machine *machine,
685 struct addr_location *al,
686 struct perf_sample *sample,
687 symbol_filter_t filter)
688 {
689 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
690 struct thread *thread = machine__findnew_thread(machine, event->ip.pid);
691
692 if (thread == NULL)
693 return -1;
694
695 if (symbol_conf.comm_list &&
696 !strlist__has_entry(symbol_conf.comm_list, thread->comm))
697 goto out_filtered;
698
699 dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
700 /*
701 * Have we already created the kernel maps for this machine?
702 *
703 * This should have happened earlier, when we processed the kernel MMAP
704 * events, but for older perf.data files there was no such thing, so do
705 * it now.
706 */
707 if (cpumode == PERF_RECORD_MISC_KERNEL &&
708 machine->vmlinux_maps[MAP__FUNCTION] == NULL)
709 machine__create_kernel_maps(machine);
710
711 thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
712 event->ip.ip, al);
713 dump_printf(" ...... dso: %s\n",
714 al->map ? al->map->dso->long_name :
715 al->level == 'H' ? "[hypervisor]" : "<not found>");
716 al->sym = NULL;
717 al->cpu = sample->cpu;
718
719 if (al->map) {
720 struct dso *dso = al->map->dso;
721
722 if (symbol_conf.dso_list &&
723 (!dso || !(strlist__has_entry(symbol_conf.dso_list,
724 dso->short_name) ||
725 (dso->short_name != dso->long_name &&
726 strlist__has_entry(symbol_conf.dso_list,
727 dso->long_name)))))
728 goto out_filtered;
729
730 al->sym = map__find_symbol(al->map, al->addr, filter);
731 }
732
733 if (symbol_conf.sym_list &&
734 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
735 al->sym->name)))
736 goto out_filtered;
737
738 return 0;
739
740 out_filtered:
741 al->filtered = true;
742 return 0;
743 }
Linus' kernel tree