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1#include <linux/types.h>
2#include "event.h"
3#include "debug.h"
4#include "sort.h"
5#include "string.h"
6#include "strlist.h"
7#include "thread.h"
8#include "thread_map.h"
9
10static const char *perf_event__names[] = {
11 [0] = "TOTAL",
12 [PERF_RECORD_MMAP] = "MMAP",
13 [PERF_RECORD_LOST] = "LOST",
14 [PERF_RECORD_COMM] = "COMM",
15 [PERF_RECORD_EXIT] = "EXIT",
16 [PERF_RECORD_THROTTLE] = "THROTTLE",
17 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
18 [PERF_RECORD_FORK] = "FORK",
19 [PERF_RECORD_READ] = "READ",
20 [PERF_RECORD_SAMPLE] = "SAMPLE",
21 [PERF_RECORD_HEADER_ATTR] = "ATTR",
22 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
23 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
24 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
25 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
26};
27
28const char *perf_event__name(unsigned int id)
29{
30 if (id >= ARRAY_SIZE(perf_event__names))
31 return "INVALID";
32 if (!perf_event__names[id])
33 return "UNKNOWN";
34 return perf_event__names[id];
35}
36
37static struct perf_sample synth_sample = {
38 .pid = -1,
39 .tid = -1,
40 .time = -1,
41 .stream_id = -1,
42 .cpu = -1,
43 .period = 1,
44};
45
46static pid_t perf_event__get_comm_tgid(pid_t pid, char *comm, size_t len)
47{
48 char filename[PATH_MAX];
49 char bf[BUFSIZ];
50 FILE *fp;
51 size_t size = 0;
52 pid_t tgid = -1;
53
54 snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
55
56 fp = fopen(filename, "r");
57 if (fp == NULL) {
58 pr_debug("couldn't open %s\n", filename);
59 return 0;
60 }
61
62 while (!comm[0] || (tgid < 0)) {
63 if (fgets(bf, sizeof(bf), fp) == NULL) {
64 pr_warning("couldn't get COMM and pgid, malformed %s\n",
65 filename);
66 break;
67 }
68
69 if (memcmp(bf, "Name:", 5) == 0) {
70 char *name = bf + 5;
71 while (*name && isspace(*name))
72 ++name;
73 size = strlen(name) - 1;
74 if (size >= len)
75 size = len - 1;
76 memcpy(comm, name, size);
77 comm[size] = '\0';
78
79 } else if (memcmp(bf, "Tgid:", 5) == 0) {
80 char *tgids = bf + 5;
81 while (*tgids && isspace(*tgids))
82 ++tgids;
83 tgid = atoi(tgids);
84 }
85 }
86
87 fclose(fp);
88
89 return tgid;
90}
91
92static pid_t perf_event__synthesize_comm(struct perf_tool *tool,
93 union perf_event *event, pid_t pid,
94 int full,
95 perf_event__handler_t process,
96 struct machine *machine)
97{
98 char filename[PATH_MAX];
99 size_t size;
100 DIR *tasks;
101 struct dirent dirent, *next;
102 pid_t tgid;
103
104 memset(&event->comm, 0, sizeof(event->comm));
105
106 tgid = perf_event__get_comm_tgid(pid, event->comm.comm,
107 sizeof(event->comm.comm));
108 if (tgid < 0)
109 goto out;
110
111 event->comm.pid = tgid;
112 event->comm.header.type = PERF_RECORD_COMM;
113
114 size = strlen(event->comm.comm) + 1;
115 size = ALIGN(size, sizeof(u64));
116 memset(event->comm.comm + size, 0, machine->id_hdr_size);
117 event->comm.header.size = (sizeof(event->comm) -
118 (sizeof(event->comm.comm) - size) +
119 machine->id_hdr_size);
120 if (!full) {
121 event->comm.tid = pid;
122
123 process(tool, event, &synth_sample, machine);
124 goto out;
125 }
126
127 snprintf(filename, sizeof(filename), "/proc/%d/task", pid);
128
129 tasks = opendir(filename);
130 if (tasks == NULL) {
131 pr_debug("couldn't open %s\n", filename);
132 return 0;
133 }
134
135 while (!readdir_r(tasks, &dirent, &next) && next) {
136 char *end;
137 pid = strtol(dirent.d_name, &end, 10);
138 if (*end)
139 continue;
140
141 /* already have tgid; jut want to update the comm */
142 (void) perf_event__get_comm_tgid(pid, event->comm.comm,
143 sizeof(event->comm.comm));
144
145 size = strlen(event->comm.comm) + 1;
146 size = ALIGN(size, sizeof(u64));
147 memset(event->comm.comm + size, 0, machine->id_hdr_size);
148 event->comm.header.size = (sizeof(event->comm) -
149 (sizeof(event->comm.comm) - size) +
150 machine->id_hdr_size);
151
152 event->comm.tid = pid;
153
154 process(tool, event, &synth_sample, machine);
155 }
156
157 closedir(tasks);
158out:
159 return tgid;
160}
161
162static int perf_event__synthesize_mmap_events(struct perf_tool *tool,
163 union perf_event *event,
164 pid_t pid, pid_t tgid,
165 perf_event__handler_t process,
166 struct machine *machine)
167{
168 char filename[PATH_MAX];
169 FILE *fp;
170
171 snprintf(filename, sizeof(filename), "/proc/%d/maps", pid);
172
173 fp = fopen(filename, "r");
174 if (fp == NULL) {
175 /*
176 * We raced with a task exiting - just return:
177 */
178 pr_debug("couldn't open %s\n", filename);
179 return -1;
180 }
181
182 event->header.type = PERF_RECORD_MMAP;
183 /*
184 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
185 */
186 event->header.misc = PERF_RECORD_MISC_USER;
187
188 while (1) {
189 char bf[BUFSIZ], *pbf = bf;
190 int n;
191 size_t size;
192 if (fgets(bf, sizeof(bf), fp) == NULL)
193 break;
194
195 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
196 n = hex2u64(pbf, &event->mmap.start);
197 if (n < 0)
198 continue;
199 pbf += n + 1;
200 n = hex2u64(pbf, &event->mmap.len);
201 if (n < 0)
202 continue;
203 pbf += n + 3;
204 if (*pbf == 'x') { /* vm_exec */
205 char anonstr[] = "//anon\n";
206 char *execname = strchr(bf, '/');
207
208 /* Catch VDSO */
209 if (execname == NULL)
210 execname = strstr(bf, "[vdso]");
211
212 /* Catch anonymous mmaps */
213 if ((execname == NULL) && !strstr(bf, "["))
214 execname = anonstr;
215
216 if (execname == NULL)
217 continue;
218
219 pbf += 3;
220 n = hex2u64(pbf, &event->mmap.pgoff);
221
222 size = strlen(execname);
223 execname[size - 1] = '\0'; /* Remove \n */
224 memcpy(event->mmap.filename, execname, size);
225 size = ALIGN(size, sizeof(u64));
226 event->mmap.len -= event->mmap.start;
227 event->mmap.header.size = (sizeof(event->mmap) -
228 (sizeof(event->mmap.filename) - size));
229 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
230 event->mmap.header.size += machine->id_hdr_size;
231 event->mmap.pid = tgid;
232 event->mmap.tid = pid;
233
234 process(tool, event, &synth_sample, machine);
235 }
236 }
237
238 fclose(fp);
239 return 0;
240}
241
242int perf_event__synthesize_modules(struct perf_tool *tool,
243 perf_event__handler_t process,
244 struct machine *machine)
245{
246 struct rb_node *nd;
247 struct map_groups *kmaps = &machine->kmaps;
248 union perf_event *event = zalloc((sizeof(event->mmap) +
249 machine->id_hdr_size));
250 if (event == NULL) {
251 pr_debug("Not enough memory synthesizing mmap event "
252 "for kernel modules\n");
253 return -1;
254 }
255
256 event->header.type = PERF_RECORD_MMAP;
257
258 /*
259 * kernel uses 0 for user space maps, see kernel/perf_event.c
260 * __perf_event_mmap
261 */
262 if (machine__is_host(machine))
263 event->header.misc = PERF_RECORD_MISC_KERNEL;
264 else
265 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
266
267 for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
268 nd; nd = rb_next(nd)) {
269 size_t size;
270 struct map *pos = rb_entry(nd, struct map, rb_node);
271
272 if (pos->dso->kernel)
273 continue;
274
275 size = ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
276 event->mmap.header.type = PERF_RECORD_MMAP;
277 event->mmap.header.size = (sizeof(event->mmap) -
278 (sizeof(event->mmap.filename) - size));
279 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
280 event->mmap.header.size += machine->id_hdr_size;
281 event->mmap.start = pos->start;
282 event->mmap.len = pos->end - pos->start;
283 event->mmap.pid = machine->pid;
284
285 memcpy(event->mmap.filename, pos->dso->long_name,
286 pos->dso->long_name_len + 1);
287 process(tool, event, &synth_sample, machine);
288 }
289
290 free(event);
291 return 0;
292}
293
294static int __event__synthesize_thread(union perf_event *comm_event,
295 union perf_event *mmap_event,
296 pid_t pid, int full,
297 perf_event__handler_t process,
298 struct perf_tool *tool,
299 struct machine *machine)
300{
301 pid_t tgid = perf_event__synthesize_comm(tool, comm_event, pid, full,
302 process, machine);
303 if (tgid == -1)
304 return -1;
305 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
306 process, machine);
307}
308
309int perf_event__synthesize_thread_map(struct perf_tool *tool,
310 struct thread_map *threads,
311 perf_event__handler_t process,
312 struct machine *machine)
313{
314 union perf_event *comm_event, *mmap_event;
315 int err = -1, thread, j;
316
317 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
318 if (comm_event == NULL)
319 goto out;
320
321 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
322 if (mmap_event == NULL)
323 goto out_free_comm;
324
325 err = 0;
326 for (thread = 0; thread < threads->nr; ++thread) {
327 if (__event__synthesize_thread(comm_event, mmap_event,
328 threads->map[thread], 0,
329 process, tool, machine)) {
330 err = -1;
331 break;
332 }
333
334 /*
335 * comm.pid is set to thread group id by
336 * perf_event__synthesize_comm
337 */
338 if ((int) comm_event->comm.pid != threads->map[thread]) {
339 bool need_leader = true;
340
341 /* is thread group leader in thread_map? */
342 for (j = 0; j < threads->nr; ++j) {
343 if ((int) comm_event->comm.pid == threads->map[j]) {
344 need_leader = false;
345 break;
346 }
347 }
348
349 /* if not, generate events for it */
350 if (need_leader &&
351 __event__synthesize_thread(comm_event,
352 mmap_event,
353 comm_event->comm.pid, 0,
354 process, tool, machine)) {
355 err = -1;
356 break;
357 }
358 }
359 }
360 free(mmap_event);
361out_free_comm:
362 free(comm_event);
363out:
364 return err;
365}
366
367int perf_event__synthesize_threads(struct perf_tool *tool,
368 perf_event__handler_t process,
369 struct machine *machine)
370{
371 DIR *proc;
372 struct dirent dirent, *next;
373 union perf_event *comm_event, *mmap_event;
374 int err = -1;
375
376 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
377 if (comm_event == NULL)
378 goto out;
379
380 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
381 if (mmap_event == NULL)
382 goto out_free_comm;
383
384 proc = opendir("/proc");
385 if (proc == NULL)
386 goto out_free_mmap;
387
388 while (!readdir_r(proc, &dirent, &next) && next) {
389 char *end;
390 pid_t pid = strtol(dirent.d_name, &end, 10);
391
392 if (*end) /* only interested in proper numerical dirents */
393 continue;
394
395 __event__synthesize_thread(comm_event, mmap_event, pid, 1,
396 process, tool, machine);
397 }
398
399 closedir(proc);
400 err = 0;
401out_free_mmap:
402 free(mmap_event);
403out_free_comm:
404 free(comm_event);
405out:
406 return err;
407}
408
409struct process_symbol_args {
410 const char *name;
411 u64 start;
412};
413
414static int find_symbol_cb(void *arg, const char *name, char type,
415 u64 start, u64 end __used)
416{
417 struct process_symbol_args *args = arg;
418
419 /*
420 * Must be a function or at least an alias, as in PARISC64, where "_text" is
421 * an 'A' to the same address as "_stext".
422 */
423 if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
424 type == 'A') || strcmp(name, args->name))
425 return 0;
426
427 args->start = start;
428 return 1;
429}
430
431int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
432 perf_event__handler_t process,
433 struct machine *machine,
434 const char *symbol_name)
435{
436 size_t size;
437 const char *filename, *mmap_name;
438 char path[PATH_MAX];
439 char name_buff[PATH_MAX];
440 struct map *map;
441 int err;
442 /*
443 * We should get this from /sys/kernel/sections/.text, but till that is
444 * available use this, and after it is use this as a fallback for older
445 * kernels.
446 */
447 struct process_symbol_args args = { .name = symbol_name, };
448 union perf_event *event = zalloc((sizeof(event->mmap) +
449 machine->id_hdr_size));
450 if (event == NULL) {
451 pr_debug("Not enough memory synthesizing mmap event "
452 "for kernel modules\n");
453 return -1;
454 }
455
456 mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
457 if (machine__is_host(machine)) {
458 /*
459 * kernel uses PERF_RECORD_MISC_USER for user space maps,
460 * see kernel/perf_event.c __perf_event_mmap
461 */
462 event->header.misc = PERF_RECORD_MISC_KERNEL;
463 filename = "/proc/kallsyms";
464 } else {
465 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
466 if (machine__is_default_guest(machine))
467 filename = (char *) symbol_conf.default_guest_kallsyms;
468 else {
469 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
470 filename = path;
471 }
472 }
473
474 if (kallsyms__parse(filename, &args, find_symbol_cb) <= 0)
475 return -ENOENT;
476
477 map = machine->vmlinux_maps[MAP__FUNCTION];
478 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
479 "%s%s", mmap_name, symbol_name) + 1;
480 size = ALIGN(size, sizeof(u64));
481 event->mmap.header.type = PERF_RECORD_MMAP;
482 event->mmap.header.size = (sizeof(event->mmap) -
483 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
484 event->mmap.pgoff = args.start;
485 event->mmap.start = map->start;
486 event->mmap.len = map->end - event->mmap.start;
487 event->mmap.pid = machine->pid;
488
489 err = process(tool, event, &synth_sample, machine);
490 free(event);
491
492 return err;
493}
494
495size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
496{
497 return fprintf(fp, ": %s:%d\n", event->comm.comm, event->comm.tid);
498}
499
500int perf_event__process_comm(struct perf_tool *tool __used,
501 union perf_event *event,
502 struct perf_sample *sample __used,
503 struct machine *machine)
504{
505 struct thread *thread = machine__findnew_thread(machine, event->comm.tid);
506
507 if (dump_trace)
508 perf_event__fprintf_comm(event, stdout);
509
510 if (thread == NULL || thread__set_comm(thread, event->comm.comm)) {
511 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
512 return -1;
513 }
514
515 return 0;
516}
517
518int perf_event__process_lost(struct perf_tool *tool __used,
519 union perf_event *event,
520 struct perf_sample *sample __used,
521 struct machine *machine __used)
522{
523 dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
524 event->lost.id, event->lost.lost);
525 return 0;
526}
527
528static void perf_event__set_kernel_mmap_len(union perf_event *event,
529 struct map **maps)
530{
531 maps[MAP__FUNCTION]->start = event->mmap.start;
532 maps[MAP__FUNCTION]->end = event->mmap.start + event->mmap.len;
533 /*
534 * Be a bit paranoid here, some perf.data file came with
535 * a zero sized synthesized MMAP event for the kernel.
536 */
537 if (maps[MAP__FUNCTION]->end == 0)
538 maps[MAP__FUNCTION]->end = ~0ULL;
539}
540
541static int perf_event__process_kernel_mmap(struct perf_tool *tool __used,
542 union perf_event *event,
543 struct machine *machine)
544{
545 struct map *map;
546 char kmmap_prefix[PATH_MAX];
547 enum dso_kernel_type kernel_type;
548 bool is_kernel_mmap;
549
550 machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
551 if (machine__is_host(machine))
552 kernel_type = DSO_TYPE_KERNEL;
553 else
554 kernel_type = DSO_TYPE_GUEST_KERNEL;
555
556 is_kernel_mmap = memcmp(event->mmap.filename,
557 kmmap_prefix,
558 strlen(kmmap_prefix) - 1) == 0;
559 if (event->mmap.filename[0] == '/' ||
560 (!is_kernel_mmap && event->mmap.filename[0] == '[')) {
561
562 char short_module_name[1024];
563 char *name, *dot;
564
565 if (event->mmap.filename[0] == '/') {
566 name = strrchr(event->mmap.filename, '/');
567 if (name == NULL)
568 goto out_problem;
569
570 ++name; /* skip / */
571 dot = strrchr(name, '.');
572 if (dot == NULL)
573 goto out_problem;
574 snprintf(short_module_name, sizeof(short_module_name),
575 "[%.*s]", (int)(dot - name), name);
576 strxfrchar(short_module_name, '-', '_');
577 } else
578 strcpy(short_module_name, event->mmap.filename);
579
580 map = machine__new_module(machine, event->mmap.start,
581 event->mmap.filename);
582 if (map == NULL)
583 goto out_problem;
584
585 name = strdup(short_module_name);
586 if (name == NULL)
587 goto out_problem;
588
589 map->dso->short_name = name;
590 map->dso->sname_alloc = 1;
591 map->end = map->start + event->mmap.len;
592 } else if (is_kernel_mmap) {
593 const char *symbol_name = (event->mmap.filename +
594 strlen(kmmap_prefix));
595 /*
596 * Should be there already, from the build-id table in
597 * the header.
598 */
599 struct dso *kernel = __dsos__findnew(&machine->kernel_dsos,
600 kmmap_prefix);
601 if (kernel == NULL)
602 goto out_problem;
603
604 kernel->kernel = kernel_type;
605 if (__machine__create_kernel_maps(machine, kernel) < 0)
606 goto out_problem;
607
608 perf_event__set_kernel_mmap_len(event, machine->vmlinux_maps);
609
610 /*
611 * Avoid using a zero address (kptr_restrict) for the ref reloc
612 * symbol. Effectively having zero here means that at record
613 * time /proc/sys/kernel/kptr_restrict was non zero.
614 */
615 if (event->mmap.pgoff != 0) {
616 maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
617 symbol_name,
618 event->mmap.pgoff);
619 }
620
621 if (machine__is_default_guest(machine)) {
622 /*
623 * preload dso of guest kernel and modules
624 */
625 dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION],
626 NULL);
627 }
628 }
629 return 0;
630out_problem:
631 return -1;
632}
633
634size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
635{
636 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %s\n",
637 event->mmap.pid, event->mmap.tid, event->mmap.start,
638 event->mmap.len, event->mmap.pgoff, event->mmap.filename);
639}
640
641int perf_event__process_mmap(struct perf_tool *tool,
642 union perf_event *event,
643 struct perf_sample *sample __used,
644 struct machine *machine)
645{
646 struct thread *thread;
647 struct map *map;
648 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
649 int ret = 0;
650
651 if (dump_trace)
652 perf_event__fprintf_mmap(event, stdout);
653
654 if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
655 cpumode == PERF_RECORD_MISC_KERNEL) {
656 ret = perf_event__process_kernel_mmap(tool, event, machine);
657 if (ret < 0)
658 goto out_problem;
659 return 0;
660 }
661
662 thread = machine__findnew_thread(machine, event->mmap.pid);
663 if (thread == NULL)
664 goto out_problem;
665 map = map__new(&machine->user_dsos, event->mmap.start,
666 event->mmap.len, event->mmap.pgoff,
667 event->mmap.pid, event->mmap.filename,
668 MAP__FUNCTION);
669 if (map == NULL)
670 goto out_problem;
671
672 thread__insert_map(thread, map);
673 return 0;
674
675out_problem:
676 dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
677 return 0;
678}
679
680size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
681{
682 return fprintf(fp, "(%d:%d):(%d:%d)\n",
683 event->fork.pid, event->fork.tid,
684 event->fork.ppid, event->fork.ptid);
685}
686
687int perf_event__process_task(struct perf_tool *tool __used,
688 union perf_event *event,
689 struct perf_sample *sample __used,
690 struct machine *machine)
691{
692 struct thread *thread = machine__findnew_thread(machine, event->fork.tid);
693 struct thread *parent = machine__findnew_thread(machine, event->fork.ptid);
694
695 if (dump_trace)
696 perf_event__fprintf_task(event, stdout);
697
698 if (event->header.type == PERF_RECORD_EXIT) {
699 machine__remove_thread(machine, thread);
700 return 0;
701 }
702
703 if (thread == NULL || parent == NULL ||
704 thread__fork(thread, parent) < 0) {
705 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
706 return -1;
707 }
708
709 return 0;
710}
711
712size_t perf_event__fprintf(union perf_event *event, FILE *fp)
713{
714 size_t ret = fprintf(fp, "PERF_RECORD_%s",
715 perf_event__name(event->header.type));
716
717 switch (event->header.type) {
718 case PERF_RECORD_COMM:
719 ret += perf_event__fprintf_comm(event, fp);
720 break;
721 case PERF_RECORD_FORK:
722 case PERF_RECORD_EXIT:
723 ret += perf_event__fprintf_task(event, fp);
724 break;
725 case PERF_RECORD_MMAP:
726 ret += perf_event__fprintf_mmap(event, fp);
727 break;
728 default:
729 ret += fprintf(fp, "\n");
730 }
731
732 return ret;
733}
734
735int perf_event__process(struct perf_tool *tool, union perf_event *event,
736 struct perf_sample *sample, struct machine *machine)
737{
738 switch (event->header.type) {
739 case PERF_RECORD_COMM:
740 perf_event__process_comm(tool, event, sample, machine);
741 break;
742 case PERF_RECORD_MMAP:
743 perf_event__process_mmap(tool, event, sample, machine);
744 break;
745 case PERF_RECORD_FORK:
746 case PERF_RECORD_EXIT:
747 perf_event__process_task(tool, event, sample, machine);
748 break;
749 case PERF_RECORD_LOST:
750 perf_event__process_lost(tool, event, sample, machine);
751 default:
752 break;
753 }
754
755 return 0;
756}
757
758void thread__find_addr_map(struct thread *self,
759 struct machine *machine, u8 cpumode,
760 enum map_type type, u64 addr,
761 struct addr_location *al)
762{
763 struct map_groups *mg = &self->mg;
764
765 al->thread = self;
766 al->addr = addr;
767 al->cpumode = cpumode;
768 al->filtered = false;
769
770 if (machine == NULL) {
771 al->map = NULL;
772 return;
773 }
774
775 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
776 al->level = 'k';
777 mg = &machine->kmaps;
778 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
779 al->level = '.';
780 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
781 al->level = 'g';
782 mg = &machine->kmaps;
783 } else {
784 /*
785 * 'u' means guest os user space.
786 * TODO: We don't support guest user space. Might support late.
787 */
788 if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest)
789 al->level = 'u';
790 else
791 al->level = 'H';
792 al->map = NULL;
793
794 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
795 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
796 !perf_guest)
797 al->filtered = true;
798 if ((cpumode == PERF_RECORD_MISC_USER ||
799 cpumode == PERF_RECORD_MISC_KERNEL) &&
800 !perf_host)
801 al->filtered = true;
802
803 return;
804 }
805try_again:
806 al->map = map_groups__find(mg, type, al->addr);
807 if (al->map == NULL) {
808 /*
809 * If this is outside of all known maps, and is a negative
810 * address, try to look it up in the kernel dso, as it might be
811 * a vsyscall or vdso (which executes in user-mode).
812 *
813 * XXX This is nasty, we should have a symbol list in the
814 * "[vdso]" dso, but for now lets use the old trick of looking
815 * in the whole kernel symbol list.
816 */
817 if ((long long)al->addr < 0 &&
818 cpumode == PERF_RECORD_MISC_USER &&
819 machine && mg != &machine->kmaps) {
820 mg = &machine->kmaps;
821 goto try_again;
822 }
823 } else
824 al->addr = al->map->map_ip(al->map, al->addr);
825}
826
827void thread__find_addr_location(struct thread *thread, struct machine *machine,
828 u8 cpumode, enum map_type type, u64 addr,
829 struct addr_location *al,
830 symbol_filter_t filter)
831{
832 thread__find_addr_map(thread, machine, cpumode, type, addr, al);
833 if (al->map != NULL)
834 al->sym = map__find_symbol(al->map, al->addr, filter);
835 else
836 al->sym = NULL;
837}
838
839int perf_event__preprocess_sample(const union perf_event *event,
840 struct machine *machine,
841 struct addr_location *al,
842 struct perf_sample *sample,
843 symbol_filter_t filter)
844{
845 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
846 struct thread *thread = machine__findnew_thread(machine, event->ip.pid);
847
848 if (thread == NULL)
849 return -1;
850
851 if (symbol_conf.comm_list &&
852 !strlist__has_entry(symbol_conf.comm_list, thread->comm))
853 goto out_filtered;
854
855 dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
856 /*
857 * Have we already created the kernel maps for this machine?
858 *
859 * This should have happened earlier, when we processed the kernel MMAP
860 * events, but for older perf.data files there was no such thing, so do
861 * it now.
862 */
863 if (cpumode == PERF_RECORD_MISC_KERNEL &&
864 machine->vmlinux_maps[MAP__FUNCTION] == NULL)
865 machine__create_kernel_maps(machine);
866
867 thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
868 event->ip.ip, al);
869 dump_printf(" ...... dso: %s\n",
870 al->map ? al->map->dso->long_name :
871 al->level == 'H' ? "[hypervisor]" : "<not found>");
872 al->sym = NULL;
873 al->cpu = sample->cpu;
874
875 if (al->map) {
876 struct dso *dso = al->map->dso;
877
878 if (symbol_conf.dso_list &&
879 (!dso || !(strlist__has_entry(symbol_conf.dso_list,
880 dso->short_name) ||
881 (dso->short_name != dso->long_name &&
882 strlist__has_entry(symbol_conf.dso_list,
883 dso->long_name)))))
884 goto out_filtered;
885
886 al->sym = map__find_symbol(al->map, al->addr, filter);
887 }
888
889 if (symbol_conf.sym_list && al->sym &&
890 !strlist__has_entry(symbol_conf.sym_list, al->sym->name))
891 goto out_filtered;
892
893 return 0;
894
895out_filtered:
896 al->filtered = true;
897 return 0;
898}