1 /* ANDROID_CHANGE_BEGIN */
2 #ifdef __APPLE__
3 #include "include/linux/types.h"
4 #else
5 /* Suppress kernel-name space pollution in <linux/types.h> below */
6 #include <features.h>
7 #include <linux/types.h>
8 #endif
9 /* ANDROID_CHANGE_END */
10 #include "event.h"
11 #include "debug.h"
12 #include "session.h"
13 #include "sort.h"
14 #include "string.h"
15 #include "strlist.h"
16 #include "thread.h"
17 #include "thread_map.h"
18
19 static const char *perf_event__names[] = {
20 [0] = "TOTAL",
21 [PERF_RECORD_MMAP] = "MMAP",
22 [PERF_RECORD_LOST] = "LOST",
23 [PERF_RECORD_COMM] = "COMM",
24 [PERF_RECORD_EXIT] = "EXIT",
25 [PERF_RECORD_THROTTLE] = "THROTTLE",
26 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
27 [PERF_RECORD_FORK] = "FORK",
28 [PERF_RECORD_READ] = "READ",
29 [PERF_RECORD_SAMPLE] = "SAMPLE",
30 [PERF_RECORD_HEADER_ATTR] = "ATTR",
31 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
32 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
33 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
34 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
35 };
36
perf_event__name(unsigned int id)37 const char *perf_event__name(unsigned int id)
38 {
39 if (id >= ARRAY_SIZE(perf_event__names))
40 return "INVALID";
41 if (!perf_event__names[id])
42 return "UNKNOWN";
43 return perf_event__names[id];
44 }
45
46 static struct perf_sample synth_sample = {
47 .pid = -1,
48 .tid = -1,
49 .time = -1,
50 .stream_id = -1,
51 .cpu = -1,
52 .period = 1,
53 };
54
perf_event__synthesize_comm(union perf_event * event,pid_t pid,int full,perf_event__handler_t process,struct perf_session * session)55 static pid_t perf_event__synthesize_comm(union perf_event *event, pid_t pid,
56 int full, perf_event__handler_t process,
57 struct perf_session *session)
58 {
59 char filename[PATH_MAX];
60 char bf[BUFSIZ];
61 FILE *fp;
62 size_t size = 0;
63 DIR *tasks;
64 struct dirent dirent, *next;
65 pid_t tgid = 0;
66
67 snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
68
69 fp = fopen(filename, "r");
70 if (fp == NULL) {
71 out_race:
72 /*
73 * We raced with a task exiting - just return:
74 */
75 pr_debug("couldn't open %s\n", filename);
76 return 0;
77 }
78
79 memset(&event->comm, 0, sizeof(event->comm));
80
81 while (!event->comm.comm[0] || !event->comm.pid) {
82 if (fgets(bf, sizeof(bf), fp) == NULL) {
83 pr_warning("couldn't get COMM and pgid, malformed %s\n", filename);
84 goto out;
85 }
86
87 if (memcmp(bf, "Name:", 5) == 0) {
88 char *name = bf + 5;
89 while (*name && isspace(*name))
90 ++name;
91 size = strlen(name) - 1;
92 memcpy(event->comm.comm, name, size++);
93 } else if (memcmp(bf, "Tgid:", 5) == 0) {
94 char *tgids = bf + 5;
95 while (*tgids && isspace(*tgids))
96 ++tgids;
97 tgid = event->comm.pid = atoi(tgids);
98 }
99 }
100
101 event->comm.header.type = PERF_RECORD_COMM;
102 /* ANDROID_CHANGE_BEGIN */
103 #if defined(__BIONIC__) || defined(__APPLE__)
104 size = KERNEL_ALIGN(size, sizeof(u64));
105 #else
106 size = ALIGN(size, sizeof(u64));
107 #endif
108 /* ANDROID_CHANGE_END */
109 memset(event->comm.comm + size, 0, session->id_hdr_size);
110 event->comm.header.size = (sizeof(event->comm) -
111 (sizeof(event->comm.comm) - size) +
112 session->id_hdr_size);
113 if (!full) {
114 event->comm.tid = pid;
115
116 process(event, &synth_sample, session);
117 goto out;
118 }
119
120 snprintf(filename, sizeof(filename), "/proc/%d/task", pid);
121
122 tasks = opendir(filename);
123 if (tasks == NULL)
124 goto out_race;
125
126 while (!readdir_r(tasks, &dirent, &next) && next) {
127 char *end;
128 pid = strtol(dirent.d_name, &end, 10);
129 if (*end)
130 continue;
131
132 event->comm.tid = pid;
133
134 process(event, &synth_sample, session);
135 }
136
137 closedir(tasks);
138 out:
139 fclose(fp);
140
141 return tgid;
142 }
143
perf_event__synthesize_mmap_events(union perf_event * event,pid_t pid,pid_t tgid,perf_event__handler_t process,struct perf_session * session)144 static int perf_event__synthesize_mmap_events(union perf_event *event,
145 pid_t pid, pid_t tgid,
146 perf_event__handler_t process,
147 struct perf_session *session)
148 {
149 char filename[PATH_MAX];
150 FILE *fp;
151
152 snprintf(filename, sizeof(filename), "/proc/%d/maps", pid);
153
154 fp = fopen(filename, "r");
155 if (fp == NULL) {
156 /*
157 * We raced with a task exiting - just return:
158 */
159 pr_debug("couldn't open %s\n", filename);
160 return -1;
161 }
162
163 event->header.type = PERF_RECORD_MMAP;
164 /*
165 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
166 */
167 event->header.misc = PERF_RECORD_MISC_USER;
168
169 while (1) {
170 char bf[BUFSIZ], *pbf = bf;
171 int n;
172 size_t size;
173 if (fgets(bf, sizeof(bf), fp) == NULL)
174 break;
175
176 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
177 n = hex2u64(pbf, &event->mmap.start);
178 if (n < 0)
179 continue;
180 pbf += n + 1;
181 n = hex2u64(pbf, &event->mmap.len);
182 if (n < 0)
183 continue;
184 pbf += n + 3;
185 if (*pbf == 'x') { /* vm_exec */
186 char *execname = strchr(bf, '/');
187
188 /* Catch VDSO */
189 if (execname == NULL)
190 execname = strstr(bf, "[vdso]");
191
192 if (execname == NULL)
193 continue;
194
195 pbf += 3;
196 n = hex2u64(pbf, &event->mmap.pgoff);
197
198 size = strlen(execname);
199 execname[size - 1] = '\0'; /* Remove \n */
200 memcpy(event->mmap.filename, execname, size);
201 /* ANDROID_CHANGE_BEGIN */
202 #if defined(__BIONIC__) || defined(__APPLE__)
203 size = KERNEL_ALIGN(size, sizeof(u64));
204 #else
205 size = ALIGN(size, sizeof(u64));
206 #endif
207 /* ANDROID_CHANGE_END */
208 event->mmap.len -= event->mmap.start;
209 event->mmap.header.size = (sizeof(event->mmap) -
210 (sizeof(event->mmap.filename) - size));
211 memset(event->mmap.filename + size, 0, session->id_hdr_size);
212 event->mmap.header.size += session->id_hdr_size;
213 event->mmap.pid = tgid;
214 event->mmap.tid = pid;
215
216 process(event, &synth_sample, session);
217 }
218 }
219
220 fclose(fp);
221 return 0;
222 }
223
perf_event__synthesize_modules(perf_event__handler_t process,struct perf_session * session,struct machine * machine)224 int perf_event__synthesize_modules(perf_event__handler_t process,
225 struct perf_session *session,
226 struct machine *machine)
227 {
228 struct rb_node *nd;
229 struct map_groups *kmaps = &machine->kmaps;
230 union perf_event *event = zalloc((sizeof(event->mmap) +
231 session->id_hdr_size));
232 if (event == NULL) {
233 pr_debug("Not enough memory synthesizing mmap event "
234 "for kernel modules\n");
235 return -1;
236 }
237
238 event->header.type = PERF_RECORD_MMAP;
239
240 /*
241 * kernel uses 0 for user space maps, see kernel/perf_event.c
242 * __perf_event_mmap
243 */
244 if (machine__is_host(machine))
245 event->header.misc = PERF_RECORD_MISC_KERNEL;
246 else
247 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
248
249 for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
250 nd; nd = rb_next(nd)) {
251 size_t size;
252 struct map *pos = rb_entry(nd, struct map, rb_node);
253
254 if (pos->dso->kernel)
255 continue;
256
257 /* ANDROID_CHANGE_BEGIN */
258 #if defined(__BIONIC__) || defined(__APPLE__)
259 size = KERNEL_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
260 #else
261 size = ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
262 #endif
263 /* ANDROID_CHANGE_END */
264 event->mmap.header.type = PERF_RECORD_MMAP;
265 event->mmap.header.size = (sizeof(event->mmap) -
266 (sizeof(event->mmap.filename) - size));
267 memset(event->mmap.filename + size, 0, session->id_hdr_size);
268 event->mmap.header.size += session->id_hdr_size;
269 event->mmap.start = pos->start;
270 event->mmap.len = pos->end - pos->start;
271 event->mmap.pid = machine->pid;
272
273 memcpy(event->mmap.filename, pos->dso->long_name,
274 pos->dso->long_name_len + 1);
275 process(event, &synth_sample, session);
276 }
277
278 free(event);
279 return 0;
280 }
281
__event__synthesize_thread(union perf_event * comm_event,union perf_event * mmap_event,pid_t pid,perf_event__handler_t process,struct perf_session * session)282 static int __event__synthesize_thread(union perf_event *comm_event,
283 union perf_event *mmap_event,
284 pid_t pid, perf_event__handler_t process,
285 struct perf_session *session)
286 {
287 pid_t tgid = perf_event__synthesize_comm(comm_event, pid, 1, process,
288 session);
289 if (tgid == -1)
290 return -1;
291 return perf_event__synthesize_mmap_events(mmap_event, pid, tgid,
292 process, session);
293 }
294
perf_event__synthesize_thread_map(struct thread_map * threads,perf_event__handler_t process,struct perf_session * session)295 int perf_event__synthesize_thread_map(struct thread_map *threads,
296 perf_event__handler_t process,
297 struct perf_session *session)
298 {
299 union perf_event *comm_event, *mmap_event;
300 int err = -1, thread;
301
302 comm_event = malloc(sizeof(comm_event->comm) + session->id_hdr_size);
303 if (comm_event == NULL)
304 goto out;
305
306 mmap_event = malloc(sizeof(mmap_event->mmap) + session->id_hdr_size);
307 if (mmap_event == NULL)
308 goto out_free_comm;
309
310 err = 0;
311 for (thread = 0; thread < threads->nr; ++thread) {
312 if (__event__synthesize_thread(comm_event, mmap_event,
313 threads->map[thread],
314 process, session)) {
315 err = -1;
316 break;
317 }
318 }
319 free(mmap_event);
320 out_free_comm:
321 free(comm_event);
322 out:
323 return err;
324 }
325
perf_event__synthesize_threads(perf_event__handler_t process,struct perf_session * session)326 int perf_event__synthesize_threads(perf_event__handler_t process,
327 struct perf_session *session)
328 {
329 DIR *proc;
330 struct dirent dirent, *next;
331 union perf_event *comm_event, *mmap_event;
332 int err = -1;
333
334 comm_event = malloc(sizeof(comm_event->comm) + session->id_hdr_size);
335 if (comm_event == NULL)
336 goto out;
337
338 mmap_event = malloc(sizeof(mmap_event->mmap) + session->id_hdr_size);
339 if (mmap_event == NULL)
340 goto out_free_comm;
341
342 proc = opendir("/proc");
343 if (proc == NULL)
344 goto out_free_mmap;
345
346 while (!readdir_r(proc, &dirent, &next) && next) {
347 char *end;
348 pid_t pid = strtol(dirent.d_name, &end, 10);
349
350 if (*end) /* only interested in proper numerical dirents */
351 continue;
352
353 __event__synthesize_thread(comm_event, mmap_event, pid,
354 process, session);
355 }
356
357 closedir(proc);
358 err = 0;
359 out_free_mmap:
360 free(mmap_event);
361 out_free_comm:
362 free(comm_event);
363 out:
364 return err;
365 }
366
367 struct process_symbol_args {
368 const char *name;
369 u64 start;
370 };
371
find_symbol_cb(void * arg,const char * name,char type,u64 start,u64 end __used)372 static int find_symbol_cb(void *arg, const char *name, char type,
373 u64 start, u64 end __used)
374 {
375 struct process_symbol_args *args = arg;
376
377 /*
378 * Must be a function or at least an alias, as in PARISC64, where "_text" is
379 * an 'A' to the same address as "_stext".
380 */
381 if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
382 type == 'A') || strcmp(name, args->name))
383 return 0;
384
385 args->start = start;
386 return 1;
387 }
388
perf_event__synthesize_kernel_mmap(perf_event__handler_t process,struct perf_session * session,struct machine * machine,const char * symbol_name)389 int perf_event__synthesize_kernel_mmap(perf_event__handler_t process,
390 struct perf_session *session,
391 struct machine *machine,
392 const char *symbol_name)
393 {
394 size_t size;
395 const char *filename, *mmap_name;
396 char path[PATH_MAX];
397 char name_buff[PATH_MAX];
398 struct map *map;
399 int err;
400 /*
401 * We should get this from /sys/kernel/sections/.text, but till that is
402 * available use this, and after it is use this as a fallback for older
403 * kernels.
404 */
405 struct process_symbol_args args = { .name = symbol_name, };
406 union perf_event *event = zalloc((sizeof(event->mmap) +
407 session->id_hdr_size));
408 if (event == NULL) {
409 pr_debug("Not enough memory synthesizing mmap event "
410 "for kernel modules\n");
411 return -1;
412 }
413
414 mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
415 if (machine__is_host(machine)) {
416 /*
417 * kernel uses PERF_RECORD_MISC_USER for user space maps,
418 * see kernel/perf_event.c __perf_event_mmap
419 */
420 event->header.misc = PERF_RECORD_MISC_KERNEL;
421 filename = "/proc/kallsyms";
422 } else {
423 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
424 if (machine__is_default_guest(machine))
425 filename = (char *) symbol_conf.default_guest_kallsyms;
426 else {
427 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
428 filename = path;
429 }
430 }
431
432 if (kallsyms__parse(filename, &args, find_symbol_cb) <= 0)
433 return -ENOENT;
434
435 map = machine->vmlinux_maps[MAP__FUNCTION];
436 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
437 "%s%s", mmap_name, symbol_name) + 1;
438 /* ANDROID_CHANGE_BEGIN */
439 #if defined(__BIONIC__) || defined(__APPLE__)
440 size = KERNEL_ALIGN(size, sizeof(u64));
441 #else
442 size = ALIGN(size, sizeof(u64));
443 #endif
444 /* ANDROID_CHANGE_END */
445 event->mmap.header.type = PERF_RECORD_MMAP;
446 event->mmap.header.size = (sizeof(event->mmap) -
447 (sizeof(event->mmap.filename) - size) + session->id_hdr_size);
448 event->mmap.pgoff = args.start;
449 event->mmap.start = map->start;
450 event->mmap.len = map->end - event->mmap.start;
451 event->mmap.pid = machine->pid;
452
453 err = process(event, &synth_sample, session);
454 free(event);
455
456 return err;
457 }
458
perf_event__process_comm(union perf_event * event,struct perf_sample * sample __used,struct perf_session * session)459 int perf_event__process_comm(union perf_event *event,
460 struct perf_sample *sample __used,
461 struct perf_session *session)
462 {
463 struct thread *thread = perf_session__findnew(session, event->comm.tid);
464
465 dump_printf(": %s:%d\n", event->comm.comm, event->comm.tid);
466
467 if (thread == NULL || thread__set_comm(thread, event->comm.comm)) {
468 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
469 return -1;
470 }
471
472 return 0;
473 }
474
perf_event__process_lost(union perf_event * event,struct perf_sample * sample __used,struct perf_session * session)475 int perf_event__process_lost(union perf_event *event,
476 struct perf_sample *sample __used,
477 struct perf_session *session)
478 {
479 dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
480 event->lost.id, event->lost.lost);
481 session->hists.stats.total_lost += event->lost.lost;
482 return 0;
483 }
484
perf_event__set_kernel_mmap_len(union perf_event * event,struct map ** maps)485 static void perf_event__set_kernel_mmap_len(union perf_event *event,
486 struct map **maps)
487 {
488 maps[MAP__FUNCTION]->start = event->mmap.start;
489 maps[MAP__FUNCTION]->end = event->mmap.start + event->mmap.len;
490 /*
491 * Be a bit paranoid here, some perf.data file came with
492 * a zero sized synthesized MMAP event for the kernel.
493 */
494 if (maps[MAP__FUNCTION]->end == 0)
495 maps[MAP__FUNCTION]->end = ~0ULL;
496 }
497
perf_event__process_kernel_mmap(union perf_event * event,struct perf_session * session)498 static int perf_event__process_kernel_mmap(union perf_event *event,
499 struct perf_session *session)
500 {
501 struct map *map;
502 char kmmap_prefix[PATH_MAX];
503 struct machine *machine;
504 enum dso_kernel_type kernel_type;
505 bool is_kernel_mmap;
506
507 machine = perf_session__findnew_machine(session, event->mmap.pid);
508 if (!machine) {
509 pr_err("Can't find id %d's machine\n", event->mmap.pid);
510 goto out_problem;
511 }
512
513 machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
514 if (machine__is_host(machine))
515 kernel_type = DSO_TYPE_KERNEL;
516 else
517 kernel_type = DSO_TYPE_GUEST_KERNEL;
518
519 is_kernel_mmap = memcmp(event->mmap.filename,
520 kmmap_prefix,
521 strlen(kmmap_prefix)) == 0;
522 if (event->mmap.filename[0] == '/' ||
523 (!is_kernel_mmap && event->mmap.filename[0] == '[')) {
524
525 char short_module_name[1024];
526 char *name, *dot;
527
528 if (event->mmap.filename[0] == '/') {
529 name = strrchr(event->mmap.filename, '/');
530 if (name == NULL)
531 goto out_problem;
532
533 ++name; /* skip / */
534 dot = strrchr(name, '.');
535 if (dot == NULL)
536 goto out_problem;
537 snprintf(short_module_name, sizeof(short_module_name),
538 "[%.*s]", (int)(dot - name), name);
539 strxfrchar(short_module_name, '-', '_');
540 } else
541 strcpy(short_module_name, event->mmap.filename);
542
543 map = machine__new_module(machine, event->mmap.start,
544 event->mmap.filename);
545 if (map == NULL)
546 goto out_problem;
547
548 name = strdup(short_module_name);
549 if (name == NULL)
550 goto out_problem;
551
552 map->dso->short_name = name;
553 map->dso->sname_alloc = 1;
554 map->end = map->start + event->mmap.len;
555 } else if (is_kernel_mmap) {
556 const char *symbol_name = (event->mmap.filename +
557 strlen(kmmap_prefix));
558 /*
559 * Should be there already, from the build-id table in
560 * the header.
561 */
562 struct dso *kernel = __dsos__findnew(&machine->kernel_dsos,
563 kmmap_prefix);
564 if (kernel == NULL)
565 goto out_problem;
566
567 kernel->kernel = kernel_type;
568 if (__machine__create_kernel_maps(machine, kernel) < 0)
569 goto out_problem;
570
571 perf_event__set_kernel_mmap_len(event, machine->vmlinux_maps);
572
573 /*
574 * Avoid using a zero address (kptr_restrict) for the ref reloc
575 * symbol. Effectively having zero here means that at record
576 * time /proc/sys/kernel/kptr_restrict was non zero.
577 */
578 if (event->mmap.pgoff != 0) {
579 perf_session__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
580 symbol_name,
581 event->mmap.pgoff);
582 }
583
584 if (machine__is_default_guest(machine)) {
585 /*
586 * preload dso of guest kernel and modules
587 */
588 dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION],
589 NULL);
590 }
591 }
592 return 0;
593 out_problem:
594 return -1;
595 }
596
perf_event__process_mmap(union perf_event * event,struct perf_sample * sample __used,struct perf_session * session)597 int perf_event__process_mmap(union perf_event *event,
598 struct perf_sample *sample __used,
599 struct perf_session *session)
600 {
601 struct machine *machine;
602 struct thread *thread;
603 struct map *map;
604 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
605 int ret = 0;
606
607 dump_printf(" %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %s\n",
608 event->mmap.pid, event->mmap.tid, event->mmap.start,
609 event->mmap.len, event->mmap.pgoff, event->mmap.filename);
610
611 if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
612 cpumode == PERF_RECORD_MISC_KERNEL) {
613 ret = perf_event__process_kernel_mmap(event, session);
614 if (ret < 0)
615 goto out_problem;
616 return 0;
617 }
618
619 machine = perf_session__find_host_machine(session);
620 if (machine == NULL)
621 goto out_problem;
622 thread = perf_session__findnew(session, event->mmap.pid);
623 if (thread == NULL)
624 goto out_problem;
625 map = map__new(&machine->user_dsos, event->mmap.start,
626 event->mmap.len, event->mmap.pgoff,
627 event->mmap.pid, event->mmap.filename,
628 MAP__FUNCTION);
629 if (map == NULL)
630 goto out_problem;
631
632 thread__insert_map(thread, map);
633 return 0;
634
635 out_problem:
636 dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
637 return 0;
638 }
639
perf_event__process_task(union perf_event * event,struct perf_sample * sample __used,struct perf_session * session)640 int perf_event__process_task(union perf_event *event,
641 struct perf_sample *sample __used,
642 struct perf_session *session)
643 {
644 struct thread *thread = perf_session__findnew(session, event->fork.tid);
645 struct thread *parent = perf_session__findnew(session, event->fork.ptid);
646
647 dump_printf("(%d:%d):(%d:%d)\n", event->fork.pid, event->fork.tid,
648 event->fork.ppid, event->fork.ptid);
649
650 if (event->header.type == PERF_RECORD_EXIT) {
651 perf_session__remove_thread(session, thread);
652 return 0;
653 }
654
655 if (thread == NULL || parent == NULL ||
656 thread__fork(thread, parent) < 0) {
657 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
658 return -1;
659 }
660
661 return 0;
662 }
663
perf_event__process(union perf_event * event,struct perf_sample * sample,struct perf_session * session)664 int perf_event__process(union perf_event *event, struct perf_sample *sample,
665 struct perf_session *session)
666 {
667 switch (event->header.type) {
668 case PERF_RECORD_COMM:
669 perf_event__process_comm(event, sample, session);
670 break;
671 case PERF_RECORD_MMAP:
672 perf_event__process_mmap(event, sample, session);
673 break;
674 case PERF_RECORD_FORK:
675 case PERF_RECORD_EXIT:
676 perf_event__process_task(event, sample, session);
677 break;
678 case PERF_RECORD_LOST:
679 perf_event__process_lost(event, sample, session);
680 default:
681 break;
682 }
683
684 return 0;
685 }
686
thread__find_addr_map(struct thread * self,struct perf_session * session,u8 cpumode,enum map_type type,pid_t pid,u64 addr,struct addr_location * al)687 void thread__find_addr_map(struct thread *self,
688 struct perf_session *session, u8 cpumode,
689 enum map_type type, pid_t pid, u64 addr,
690 struct addr_location *al)
691 {
692 struct map_groups *mg = &self->mg;
693 struct machine *machine = NULL;
694
695 al->thread = self;
696 al->addr = addr;
697 al->cpumode = cpumode;
698 al->filtered = false;
699
700 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
701 al->level = 'k';
702 machine = perf_session__find_host_machine(session);
703 if (machine == NULL) {
704 al->map = NULL;
705 return;
706 }
707 mg = &machine->kmaps;
708 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
709 al->level = '.';
710 machine = perf_session__find_host_machine(session);
711 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
712 al->level = 'g';
713 machine = perf_session__find_machine(session, pid);
714 if (machine == NULL) {
715 al->map = NULL;
716 return;
717 }
718 mg = &machine->kmaps;
719 } else {
720 /*
721 * 'u' means guest os user space.
722 * TODO: We don't support guest user space. Might support late.
723 */
724 if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest)
725 al->level = 'u';
726 else
727 al->level = 'H';
728 al->map = NULL;
729
730 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
731 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
732 !perf_guest)
733 al->filtered = true;
734 if ((cpumode == PERF_RECORD_MISC_USER ||
735 cpumode == PERF_RECORD_MISC_KERNEL) &&
736 !perf_host)
737 al->filtered = true;
738
739 return;
740 }
741 try_again:
742 al->map = map_groups__find(mg, type, al->addr);
743 if (al->map == NULL) {
744 /*
745 * If this is outside of all known maps, and is a negative
746 * address, try to look it up in the kernel dso, as it might be
747 * a vsyscall or vdso (which executes in user-mode).
748 *
749 * XXX This is nasty, we should have a symbol list in the
750 * "[vdso]" dso, but for now lets use the old trick of looking
751 * in the whole kernel symbol list.
752 */
753 if ((long long)al->addr < 0 &&
754 cpumode == PERF_RECORD_MISC_USER &&
755 machine && mg != &machine->kmaps) {
756 mg = &machine->kmaps;
757 goto try_again;
758 }
759 } else
760 al->addr = al->map->map_ip(al->map, al->addr);
761 }
762
thread__find_addr_location(struct thread * self,struct perf_session * session,u8 cpumode,enum map_type type,pid_t pid,u64 addr,struct addr_location * al,symbol_filter_t filter)763 void thread__find_addr_location(struct thread *self,
764 struct perf_session *session, u8 cpumode,
765 enum map_type type, pid_t pid, u64 addr,
766 struct addr_location *al,
767 symbol_filter_t filter)
768 {
769 thread__find_addr_map(self, session, cpumode, type, pid, addr, al);
770 if (al->map != NULL)
771 al->sym = map__find_symbol(al->map, al->addr, filter);
772 else
773 al->sym = NULL;
774 }
775
perf_event__preprocess_sample(const union perf_event * event,struct perf_session * session,struct addr_location * al,struct perf_sample * sample,symbol_filter_t filter)776 int perf_event__preprocess_sample(const union perf_event *event,
777 struct perf_session *session,
778 struct addr_location *al,
779 struct perf_sample *sample,
780 symbol_filter_t filter)
781 {
782 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
783 struct thread *thread = perf_session__findnew(session, event->ip.pid);
784
785 if (thread == NULL)
786 return -1;
787
788 if (symbol_conf.comm_list &&
789 !strlist__has_entry(symbol_conf.comm_list, thread->comm))
790 goto out_filtered;
791
792 dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
793 /*
794 * Have we already created the kernel maps for the host machine?
795 *
796 * This should have happened earlier, when we processed the kernel MMAP
797 * events, but for older perf.data files there was no such thing, so do
798 * it now.
799 */
800 if (cpumode == PERF_RECORD_MISC_KERNEL &&
801 session->host_machine.vmlinux_maps[MAP__FUNCTION] == NULL)
802 machine__create_kernel_maps(&session->host_machine);
803
804 thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION,
805 event->ip.pid, event->ip.ip, al);
806 dump_printf(" ...... dso: %s\n",
807 al->map ? al->map->dso->long_name :
808 al->level == 'H' ? "[hypervisor]" : "<not found>");
809 al->sym = NULL;
810 al->cpu = sample->cpu;
811
812 if (al->map) {
813 if (symbol_conf.dso_list &&
814 (!al->map || !al->map->dso ||
815 !(strlist__has_entry(symbol_conf.dso_list,
816 al->map->dso->short_name) ||
817 (al->map->dso->short_name != al->map->dso->long_name &&
818 strlist__has_entry(symbol_conf.dso_list,
819 al->map->dso->long_name)))))
820 goto out_filtered;
821
822 al->sym = map__find_symbol(al->map, al->addr, filter);
823 }
824
825 if (symbol_conf.sym_list && al->sym &&
826 !strlist__has_entry(symbol_conf.sym_list, al->sym->name))
827 goto out_filtered;
828
829 return 0;
830
831 out_filtered:
832 al->filtered = true;
833 return 0;
834 }
835