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1// SPDX-License-Identifier: GPL-2.0
2#include <dirent.h>
3#include <errno.h>
4#include <fcntl.h>
5#include <inttypes.h>
6#include <linux/kernel.h>
7#include <linux/types.h>
8#include <sys/types.h>
9#include <sys/stat.h>
10#include <unistd.h>
11#include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
12#include <api/fs/fs.h>
13#include <linux/perf_event.h>
14#include "event.h"
15#include "debug.h"
16#include "hist.h"
17#include "machine.h"
18#include "sort.h"
19#include "string2.h"
20#include "strlist.h"
21#include "thread.h"
22#include "thread_map.h"
23#include "sane_ctype.h"
24#include "symbol/kallsyms.h"
25#include "asm/bug.h"
26#include "stat.h"
27
28static const char *perf_event__names[] = {
29 [0] = "TOTAL",
30 [PERF_RECORD_MMAP] = "MMAP",
31 [PERF_RECORD_MMAP2] = "MMAP2",
32 [PERF_RECORD_LOST] = "LOST",
33 [PERF_RECORD_COMM] = "COMM",
34 [PERF_RECORD_EXIT] = "EXIT",
35 [PERF_RECORD_THROTTLE] = "THROTTLE",
36 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
37 [PERF_RECORD_FORK] = "FORK",
38 [PERF_RECORD_READ] = "READ",
39 [PERF_RECORD_SAMPLE] = "SAMPLE",
40 [PERF_RECORD_AUX] = "AUX",
41 [PERF_RECORD_ITRACE_START] = "ITRACE_START",
42 [PERF_RECORD_LOST_SAMPLES] = "LOST_SAMPLES",
43 [PERF_RECORD_SWITCH] = "SWITCH",
44 [PERF_RECORD_SWITCH_CPU_WIDE] = "SWITCH_CPU_WIDE",
45 [PERF_RECORD_NAMESPACES] = "NAMESPACES",
46 [PERF_RECORD_HEADER_ATTR] = "ATTR",
47 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
48 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
49 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
50 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
51 [PERF_RECORD_ID_INDEX] = "ID_INDEX",
52 [PERF_RECORD_AUXTRACE_INFO] = "AUXTRACE_INFO",
53 [PERF_RECORD_AUXTRACE] = "AUXTRACE",
54 [PERF_RECORD_AUXTRACE_ERROR] = "AUXTRACE_ERROR",
55 [PERF_RECORD_THREAD_MAP] = "THREAD_MAP",
56 [PERF_RECORD_CPU_MAP] = "CPU_MAP",
57 [PERF_RECORD_STAT_CONFIG] = "STAT_CONFIG",
58 [PERF_RECORD_STAT] = "STAT",
59 [PERF_RECORD_STAT_ROUND] = "STAT_ROUND",
60 [PERF_RECORD_EVENT_UPDATE] = "EVENT_UPDATE",
61 [PERF_RECORD_TIME_CONV] = "TIME_CONV",
62 [PERF_RECORD_HEADER_FEATURE] = "FEATURE",
63};
64
65static const char *perf_ns__names[] = {
66 [NET_NS_INDEX] = "net",
67 [UTS_NS_INDEX] = "uts",
68 [IPC_NS_INDEX] = "ipc",
69 [PID_NS_INDEX] = "pid",
70 [USER_NS_INDEX] = "user",
71 [MNT_NS_INDEX] = "mnt",
72 [CGROUP_NS_INDEX] = "cgroup",
73};
74
75const char *perf_event__name(unsigned int id)
76{
77 if (id >= ARRAY_SIZE(perf_event__names))
78 return "INVALID";
79 if (!perf_event__names[id])
80 return "UNKNOWN";
81 return perf_event__names[id];
82}
83
84static const char *perf_ns__name(unsigned int id)
85{
86 if (id >= ARRAY_SIZE(perf_ns__names))
87 return "UNKNOWN";
88 return perf_ns__names[id];
89}
90
91static int perf_tool__process_synth_event(struct perf_tool *tool,
92 union perf_event *event,
93 struct machine *machine,
94 perf_event__handler_t process)
95{
96 struct perf_sample synth_sample = {
97 .pid = -1,
98 .tid = -1,
99 .time = -1,
100 .stream_id = -1,
101 .cpu = -1,
102 .period = 1,
103 .cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
104 };
105
106 return process(tool, event, &synth_sample, machine);
107};
108
109/*
110 * Assumes that the first 4095 bytes of /proc/pid/stat contains
111 * the comm, tgid and ppid.
112 */
113static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
114 pid_t *tgid, pid_t *ppid)
115{
116 char filename[PATH_MAX];
117 char bf[4096];
118 int fd;
119 size_t size = 0;
120 ssize_t n;
121 char *name, *tgids, *ppids;
122
123 *tgid = -1;
124 *ppid = -1;
125
126 snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
127
128 fd = open(filename, O_RDONLY);
129 if (fd < 0) {
130 pr_debug("couldn't open %s\n", filename);
131 return -1;
132 }
133
134 n = read(fd, bf, sizeof(bf) - 1);
135 close(fd);
136 if (n <= 0) {
137 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
138 pid);
139 return -1;
140 }
141 bf[n] = '\0';
142
143 name = strstr(bf, "Name:");
144 tgids = strstr(bf, "Tgid:");
145 ppids = strstr(bf, "PPid:");
146
147 if (name) {
148 char *nl;
149
150 name += 5; /* strlen("Name:") */
151 name = ltrim(name);
152
153 nl = strchr(name, '\n');
154 if (nl)
155 *nl = '\0';
156
157 size = strlen(name);
158 if (size >= len)
159 size = len - 1;
160 memcpy(comm, name, size);
161 comm[size] = '\0';
162 } else {
163 pr_debug("Name: string not found for pid %d\n", pid);
164 }
165
166 if (tgids) {
167 tgids += 5; /* strlen("Tgid:") */
168 *tgid = atoi(tgids);
169 } else {
170 pr_debug("Tgid: string not found for pid %d\n", pid);
171 }
172
173 if (ppids) {
174 ppids += 5; /* strlen("PPid:") */
175 *ppid = atoi(ppids);
176 } else {
177 pr_debug("PPid: string not found for pid %d\n", pid);
178 }
179
180 return 0;
181}
182
183static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
184 struct machine *machine,
185 pid_t *tgid, pid_t *ppid)
186{
187 size_t size;
188
189 *ppid = -1;
190
191 memset(&event->comm, 0, sizeof(event->comm));
192
193 if (machine__is_host(machine)) {
194 if (perf_event__get_comm_ids(pid, event->comm.comm,
195 sizeof(event->comm.comm),
196 tgid, ppid) != 0) {
197 return -1;
198 }
199 } else {
200 *tgid = machine->pid;
201 }
202
203 if (*tgid < 0)
204 return -1;
205
206 event->comm.pid = *tgid;
207 event->comm.header.type = PERF_RECORD_COMM;
208
209 size = strlen(event->comm.comm) + 1;
210 size = PERF_ALIGN(size, sizeof(u64));
211 memset(event->comm.comm + size, 0, machine->id_hdr_size);
212 event->comm.header.size = (sizeof(event->comm) -
213 (sizeof(event->comm.comm) - size) +
214 machine->id_hdr_size);
215 event->comm.tid = pid;
216
217 return 0;
218}
219
220pid_t perf_event__synthesize_comm(struct perf_tool *tool,
221 union perf_event *event, pid_t pid,
222 perf_event__handler_t process,
223 struct machine *machine)
224{
225 pid_t tgid, ppid;
226
227 if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
228 return -1;
229
230 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
231 return -1;
232
233 return tgid;
234}
235
236static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
237 struct perf_ns_link_info *ns_link_info)
238{
239 struct stat64 st;
240 char proc_ns[128];
241
242 sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
243 if (stat64(proc_ns, &st) == 0) {
244 ns_link_info->dev = st.st_dev;
245 ns_link_info->ino = st.st_ino;
246 }
247}
248
249int perf_event__synthesize_namespaces(struct perf_tool *tool,
250 union perf_event *event,
251 pid_t pid, pid_t tgid,
252 perf_event__handler_t process,
253 struct machine *machine)
254{
255 u32 idx;
256 struct perf_ns_link_info *ns_link_info;
257
258 if (!tool || !tool->namespace_events)
259 return 0;
260
261 memset(&event->namespaces, 0, (sizeof(event->namespaces) +
262 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
263 machine->id_hdr_size));
264
265 event->namespaces.pid = tgid;
266 event->namespaces.tid = pid;
267
268 event->namespaces.nr_namespaces = NR_NAMESPACES;
269
270 ns_link_info = event->namespaces.link_info;
271
272 for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
273 perf_event__get_ns_link_info(pid, perf_ns__name(idx),
274 &ns_link_info[idx]);
275
276 event->namespaces.header.type = PERF_RECORD_NAMESPACES;
277
278 event->namespaces.header.size = (sizeof(event->namespaces) +
279 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
280 machine->id_hdr_size);
281
282 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
283 return -1;
284
285 return 0;
286}
287
288static int perf_event__synthesize_fork(struct perf_tool *tool,
289 union perf_event *event,
290 pid_t pid, pid_t tgid, pid_t ppid,
291 perf_event__handler_t process,
292 struct machine *machine)
293{
294 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
295
296 /*
297 * for main thread set parent to ppid from status file. For other
298 * threads set parent pid to main thread. ie., assume main thread
299 * spawns all threads in a process
300 */
301 if (tgid == pid) {
302 event->fork.ppid = ppid;
303 event->fork.ptid = ppid;
304 } else {
305 event->fork.ppid = tgid;
306 event->fork.ptid = tgid;
307 }
308 event->fork.pid = tgid;
309 event->fork.tid = pid;
310 event->fork.header.type = PERF_RECORD_FORK;
311
312 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
313
314 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
315 return -1;
316
317 return 0;
318}
319
320int perf_event__synthesize_mmap_events(struct perf_tool *tool,
321 union perf_event *event,
322 pid_t pid, pid_t tgid,
323 perf_event__handler_t process,
324 struct machine *machine,
325 bool mmap_data,
326 unsigned int proc_map_timeout)
327{
328 char filename[PATH_MAX];
329 FILE *fp;
330 unsigned long long t;
331 bool truncation = false;
332 unsigned long long timeout = proc_map_timeout * 1000000ULL;
333 int rc = 0;
334 const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
335 int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
336
337 if (machine__is_default_guest(machine))
338 return 0;
339
340 snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps",
341 machine->root_dir, pid, pid);
342
343 fp = fopen(filename, "r");
344 if (fp == NULL) {
345 /*
346 * We raced with a task exiting - just return:
347 */
348 pr_debug("couldn't open %s\n", filename);
349 return -1;
350 }
351
352 event->header.type = PERF_RECORD_MMAP2;
353 t = rdclock();
354
355 while (1) {
356 char bf[BUFSIZ];
357 char prot[5];
358 char execname[PATH_MAX];
359 char anonstr[] = "//anon";
360 unsigned int ino;
361 size_t size;
362 ssize_t n;
363
364 if (fgets(bf, sizeof(bf), fp) == NULL)
365 break;
366
367 if ((rdclock() - t) > timeout) {
368 pr_warning("Reading %s time out. "
369 "You may want to increase "
370 "the time limit by --proc-map-timeout\n",
371 filename);
372 truncation = true;
373 goto out;
374 }
375
376 /* ensure null termination since stack will be reused. */
377 strcpy(execname, "");
378
379 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
380 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n",
381 &event->mmap2.start, &event->mmap2.len, prot,
382 &event->mmap2.pgoff, &event->mmap2.maj,
383 &event->mmap2.min,
384 &ino, execname);
385
386 /*
387 * Anon maps don't have the execname.
388 */
389 if (n < 7)
390 continue;
391
392 event->mmap2.ino = (u64)ino;
393
394 /*
395 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
396 */
397 if (machine__is_host(machine))
398 event->header.misc = PERF_RECORD_MISC_USER;
399 else
400 event->header.misc = PERF_RECORD_MISC_GUEST_USER;
401
402 /* map protection and flags bits */
403 event->mmap2.prot = 0;
404 event->mmap2.flags = 0;
405 if (prot[0] == 'r')
406 event->mmap2.prot |= PROT_READ;
407 if (prot[1] == 'w')
408 event->mmap2.prot |= PROT_WRITE;
409 if (prot[2] == 'x')
410 event->mmap2.prot |= PROT_EXEC;
411
412 if (prot[3] == 's')
413 event->mmap2.flags |= MAP_SHARED;
414 else
415 event->mmap2.flags |= MAP_PRIVATE;
416
417 if (prot[2] != 'x') {
418 if (!mmap_data || prot[0] != 'r')
419 continue;
420
421 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
422 }
423
424out:
425 if (truncation)
426 event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
427
428 if (!strcmp(execname, ""))
429 strcpy(execname, anonstr);
430
431 if (hugetlbfs_mnt_len &&
432 !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) {
433 strcpy(execname, anonstr);
434 event->mmap2.flags |= MAP_HUGETLB;
435 }
436
437 size = strlen(execname) + 1;
438 memcpy(event->mmap2.filename, execname, size);
439 size = PERF_ALIGN(size, sizeof(u64));
440 event->mmap2.len -= event->mmap.start;
441 event->mmap2.header.size = (sizeof(event->mmap2) -
442 (sizeof(event->mmap2.filename) - size));
443 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
444 event->mmap2.header.size += machine->id_hdr_size;
445 event->mmap2.pid = tgid;
446 event->mmap2.tid = pid;
447
448 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
449 rc = -1;
450 break;
451 }
452
453 if (truncation)
454 break;
455 }
456
457 fclose(fp);
458 return rc;
459}
460
461int perf_event__synthesize_modules(struct perf_tool *tool,
462 perf_event__handler_t process,
463 struct machine *machine)
464{
465 int rc = 0;
466 struct map *pos;
467 struct map_groups *kmaps = &machine->kmaps;
468 struct maps *maps = &kmaps->maps[MAP__FUNCTION];
469 union perf_event *event = zalloc((sizeof(event->mmap) +
470 machine->id_hdr_size));
471 if (event == NULL) {
472 pr_debug("Not enough memory synthesizing mmap event "
473 "for kernel modules\n");
474 return -1;
475 }
476
477 event->header.type = PERF_RECORD_MMAP;
478
479 /*
480 * kernel uses 0 for user space maps, see kernel/perf_event.c
481 * __perf_event_mmap
482 */
483 if (machine__is_host(machine))
484 event->header.misc = PERF_RECORD_MISC_KERNEL;
485 else
486 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
487
488 for (pos = maps__first(maps); pos; pos = map__next(pos)) {
489 size_t size;
490
491 if (__map__is_kernel(pos))
492 continue;
493
494 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
495 event->mmap.header.type = PERF_RECORD_MMAP;
496 event->mmap.header.size = (sizeof(event->mmap) -
497 (sizeof(event->mmap.filename) - size));
498 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
499 event->mmap.header.size += machine->id_hdr_size;
500 event->mmap.start = pos->start;
501 event->mmap.len = pos->end - pos->start;
502 event->mmap.pid = machine->pid;
503
504 memcpy(event->mmap.filename, pos->dso->long_name,
505 pos->dso->long_name_len + 1);
506 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
507 rc = -1;
508 break;
509 }
510 }
511
512 free(event);
513 return rc;
514}
515
516static int __event__synthesize_thread(union perf_event *comm_event,
517 union perf_event *mmap_event,
518 union perf_event *fork_event,
519 union perf_event *namespaces_event,
520 pid_t pid, int full,
521 perf_event__handler_t process,
522 struct perf_tool *tool,
523 struct machine *machine,
524 bool mmap_data,
525 unsigned int proc_map_timeout)
526{
527 char filename[PATH_MAX];
528 DIR *tasks;
529 struct dirent *dirent;
530 pid_t tgid, ppid;
531 int rc = 0;
532
533 /* special case: only send one comm event using passed in pid */
534 if (!full) {
535 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
536 process, machine);
537
538 if (tgid == -1)
539 return -1;
540
541 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
542 tgid, process, machine) < 0)
543 return -1;
544
545
546 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
547 process, machine, mmap_data,
548 proc_map_timeout);
549 }
550
551 if (machine__is_default_guest(machine))
552 return 0;
553
554 snprintf(filename, sizeof(filename), "%s/proc/%d/task",
555 machine->root_dir, pid);
556
557 tasks = opendir(filename);
558 if (tasks == NULL) {
559 pr_debug("couldn't open %s\n", filename);
560 return 0;
561 }
562
563 while ((dirent = readdir(tasks)) != NULL) {
564 char *end;
565 pid_t _pid;
566
567 _pid = strtol(dirent->d_name, &end, 10);
568 if (*end)
569 continue;
570
571 rc = -1;
572 if (perf_event__prepare_comm(comm_event, _pid, machine,
573 &tgid, &ppid) != 0)
574 break;
575
576 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
577 ppid, process, machine) < 0)
578 break;
579
580 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
581 tgid, process, machine) < 0)
582 break;
583
584 /*
585 * Send the prepared comm event
586 */
587 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
588 break;
589
590 rc = 0;
591 if (_pid == pid) {
592 /* process the parent's maps too */
593 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
594 process, machine, mmap_data, proc_map_timeout);
595 if (rc)
596 break;
597 }
598 }
599
600 closedir(tasks);
601 return rc;
602}
603
604int perf_event__synthesize_thread_map(struct perf_tool *tool,
605 struct thread_map *threads,
606 perf_event__handler_t process,
607 struct machine *machine,
608 bool mmap_data,
609 unsigned int proc_map_timeout)
610{
611 union perf_event *comm_event, *mmap_event, *fork_event;
612 union perf_event *namespaces_event;
613 int err = -1, thread, j;
614
615 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
616 if (comm_event == NULL)
617 goto out;
618
619 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
620 if (mmap_event == NULL)
621 goto out_free_comm;
622
623 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
624 if (fork_event == NULL)
625 goto out_free_mmap;
626
627 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
628 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
629 machine->id_hdr_size);
630 if (namespaces_event == NULL)
631 goto out_free_fork;
632
633 err = 0;
634 for (thread = 0; thread < threads->nr; ++thread) {
635 if (__event__synthesize_thread(comm_event, mmap_event,
636 fork_event, namespaces_event,
637 thread_map__pid(threads, thread), 0,
638 process, tool, machine,
639 mmap_data, proc_map_timeout)) {
640 err = -1;
641 break;
642 }
643
644 /*
645 * comm.pid is set to thread group id by
646 * perf_event__synthesize_comm
647 */
648 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
649 bool need_leader = true;
650
651 /* is thread group leader in thread_map? */
652 for (j = 0; j < threads->nr; ++j) {
653 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
654 need_leader = false;
655 break;
656 }
657 }
658
659 /* if not, generate events for it */
660 if (need_leader &&
661 __event__synthesize_thread(comm_event, mmap_event,
662 fork_event, namespaces_event,
663 comm_event->comm.pid, 0,
664 process, tool, machine,
665 mmap_data, proc_map_timeout)) {
666 err = -1;
667 break;
668 }
669 }
670 }
671 free(namespaces_event);
672out_free_fork:
673 free(fork_event);
674out_free_mmap:
675 free(mmap_event);
676out_free_comm:
677 free(comm_event);
678out:
679 return err;
680}
681
682static int __perf_event__synthesize_threads(struct perf_tool *tool,
683 perf_event__handler_t process,
684 struct machine *machine,
685 bool mmap_data,
686 unsigned int proc_map_timeout,
687 struct dirent **dirent,
688 int start,
689 int num)
690{
691 union perf_event *comm_event, *mmap_event, *fork_event;
692 union perf_event *namespaces_event;
693 int err = -1;
694 char *end;
695 pid_t pid;
696 int i;
697
698 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
699 if (comm_event == NULL)
700 goto out;
701
702 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
703 if (mmap_event == NULL)
704 goto out_free_comm;
705
706 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
707 if (fork_event == NULL)
708 goto out_free_mmap;
709
710 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
711 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
712 machine->id_hdr_size);
713 if (namespaces_event == NULL)
714 goto out_free_fork;
715
716 for (i = start; i < start + num; i++) {
717 if (!isdigit(dirent[i]->d_name[0]))
718 continue;
719
720 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
721 /* only interested in proper numerical dirents */
722 if (*end)
723 continue;
724 /*
725 * We may race with exiting thread, so don't stop just because
726 * one thread couldn't be synthesized.
727 */
728 __event__synthesize_thread(comm_event, mmap_event, fork_event,
729 namespaces_event, pid, 1, process,
730 tool, machine, mmap_data,
731 proc_map_timeout);
732 }
733 err = 0;
734
735 free(namespaces_event);
736out_free_fork:
737 free(fork_event);
738out_free_mmap:
739 free(mmap_event);
740out_free_comm:
741 free(comm_event);
742out:
743 return err;
744}
745
746struct synthesize_threads_arg {
747 struct perf_tool *tool;
748 perf_event__handler_t process;
749 struct machine *machine;
750 bool mmap_data;
751 unsigned int proc_map_timeout;
752 struct dirent **dirent;
753 int num;
754 int start;
755};
756
757static void *synthesize_threads_worker(void *arg)
758{
759 struct synthesize_threads_arg *args = arg;
760
761 __perf_event__synthesize_threads(args->tool, args->process,
762 args->machine, args->mmap_data,
763 args->proc_map_timeout, args->dirent,
764 args->start, args->num);
765 return NULL;
766}
767
768int perf_event__synthesize_threads(struct perf_tool *tool,
769 perf_event__handler_t process,
770 struct machine *machine,
771 bool mmap_data,
772 unsigned int proc_map_timeout,
773 unsigned int nr_threads_synthesize)
774{
775 struct synthesize_threads_arg *args = NULL;
776 pthread_t *synthesize_threads = NULL;
777 char proc_path[PATH_MAX];
778 struct dirent **dirent;
779 int num_per_thread;
780 int m, n, i, j;
781 int thread_nr;
782 int base = 0;
783 int err = -1;
784
785
786 if (machine__is_default_guest(machine))
787 return 0;
788
789 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
790 n = scandir(proc_path, &dirent, 0, alphasort);
791 if (n < 0)
792 return err;
793
794 if (nr_threads_synthesize == UINT_MAX)
795 thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
796 else
797 thread_nr = nr_threads_synthesize;
798
799 if (thread_nr <= 1) {
800 err = __perf_event__synthesize_threads(tool, process,
801 machine, mmap_data,
802 proc_map_timeout,
803 dirent, base, n);
804 goto free_dirent;
805 }
806 if (thread_nr > n)
807 thread_nr = n;
808
809 synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
810 if (synthesize_threads == NULL)
811 goto free_dirent;
812
813 args = calloc(sizeof(*args), thread_nr);
814 if (args == NULL)
815 goto free_threads;
816
817 num_per_thread = n / thread_nr;
818 m = n % thread_nr;
819 for (i = 0; i < thread_nr; i++) {
820 args[i].tool = tool;
821 args[i].process = process;
822 args[i].machine = machine;
823 args[i].mmap_data = mmap_data;
824 args[i].proc_map_timeout = proc_map_timeout;
825 args[i].dirent = dirent;
826 }
827 for (i = 0; i < m; i++) {
828 args[i].num = num_per_thread + 1;
829 args[i].start = i * args[i].num;
830 }
831 if (i != 0)
832 base = args[i-1].start + args[i-1].num;
833 for (j = i; j < thread_nr; j++) {
834 args[j].num = num_per_thread;
835 args[j].start = base + (j - i) * args[i].num;
836 }
837
838 for (i = 0; i < thread_nr; i++) {
839 if (pthread_create(&synthesize_threads[i], NULL,
840 synthesize_threads_worker, &args[i]))
841 goto out_join;
842 }
843 err = 0;
844out_join:
845 for (i = 0; i < thread_nr; i++)
846 pthread_join(synthesize_threads[i], NULL);
847 free(args);
848free_threads:
849 free(synthesize_threads);
850free_dirent:
851 for (i = 0; i < n; i++)
852 free(dirent[i]);
853 free(dirent);
854
855 return err;
856}
857
858struct process_symbol_args {
859 const char *name;
860 u64 start;
861};
862
863static int find_symbol_cb(void *arg, const char *name, char type,
864 u64 start)
865{
866 struct process_symbol_args *args = arg;
867
868 /*
869 * Must be a function or at least an alias, as in PARISC64, where "_text" is
870 * an 'A' to the same address as "_stext".
871 */
872 if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
873 type == 'A') || strcmp(name, args->name))
874 return 0;
875
876 args->start = start;
877 return 1;
878}
879
880int kallsyms__get_function_start(const char *kallsyms_filename,
881 const char *symbol_name, u64 *addr)
882{
883 struct process_symbol_args args = { .name = symbol_name, };
884
885 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
886 return -1;
887
888 *addr = args.start;
889 return 0;
890}
891
892int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
893 perf_event__handler_t process,
894 struct machine *machine)
895{
896 size_t size;
897 struct map *map = machine__kernel_map(machine);
898 struct kmap *kmap;
899 int err;
900 union perf_event *event;
901
902 if (symbol_conf.kptr_restrict)
903 return -1;
904 if (map == NULL)
905 return -1;
906
907 /*
908 * We should get this from /sys/kernel/sections/.text, but till that is
909 * available use this, and after it is use this as a fallback for older
910 * kernels.
911 */
912 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
913 if (event == NULL) {
914 pr_debug("Not enough memory synthesizing mmap event "
915 "for kernel modules\n");
916 return -1;
917 }
918
919 if (machine__is_host(machine)) {
920 /*
921 * kernel uses PERF_RECORD_MISC_USER for user space maps,
922 * see kernel/perf_event.c __perf_event_mmap
923 */
924 event->header.misc = PERF_RECORD_MISC_KERNEL;
925 } else {
926 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
927 }
928
929 kmap = map__kmap(map);
930 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
931 "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
932 size = PERF_ALIGN(size, sizeof(u64));
933 event->mmap.header.type = PERF_RECORD_MMAP;
934 event->mmap.header.size = (sizeof(event->mmap) -
935 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
936 event->mmap.pgoff = kmap->ref_reloc_sym->addr;
937 event->mmap.start = map->start;
938 event->mmap.len = map->end - event->mmap.start;
939 event->mmap.pid = machine->pid;
940
941 err = perf_tool__process_synth_event(tool, event, machine, process);
942 free(event);
943
944 return err;
945}
946
947int perf_event__synthesize_thread_map2(struct perf_tool *tool,
948 struct thread_map *threads,
949 perf_event__handler_t process,
950 struct machine *machine)
951{
952 union perf_event *event;
953 int i, err, size;
954
955 size = sizeof(event->thread_map);
956 size += threads->nr * sizeof(event->thread_map.entries[0]);
957
958 event = zalloc(size);
959 if (!event)
960 return -ENOMEM;
961
962 event->header.type = PERF_RECORD_THREAD_MAP;
963 event->header.size = size;
964 event->thread_map.nr = threads->nr;
965
966 for (i = 0; i < threads->nr; i++) {
967 struct thread_map_event_entry *entry = &event->thread_map.entries[i];
968 char *comm = thread_map__comm(threads, i);
969
970 if (!comm)
971 comm = (char *) "";
972
973 entry->pid = thread_map__pid(threads, i);
974 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
975 }
976
977 err = process(tool, event, NULL, machine);
978
979 free(event);
980 return err;
981}
982
983static void synthesize_cpus(struct cpu_map_entries *cpus,
984 struct cpu_map *map)
985{
986 int i;
987
988 cpus->nr = map->nr;
989
990 for (i = 0; i < map->nr; i++)
991 cpus->cpu[i] = map->map[i];
992}
993
994static void synthesize_mask(struct cpu_map_mask *mask,
995 struct cpu_map *map, int max)
996{
997 int i;
998
999 mask->nr = BITS_TO_LONGS(max);
1000 mask->long_size = sizeof(long);
1001
1002 for (i = 0; i < map->nr; i++)
1003 set_bit(map->map[i], mask->mask);
1004}
1005
1006static size_t cpus_size(struct cpu_map *map)
1007{
1008 return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
1009}
1010
1011static size_t mask_size(struct cpu_map *map, int *max)
1012{
1013 int i;
1014
1015 *max = 0;
1016
1017 for (i = 0; i < map->nr; i++) {
1018 /* bit possition of the cpu is + 1 */
1019 int bit = map->map[i] + 1;
1020
1021 if (bit > *max)
1022 *max = bit;
1023 }
1024
1025 return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long);
1026}
1027
1028void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max)
1029{
1030 size_t size_cpus, size_mask;
1031 bool is_dummy = cpu_map__empty(map);
1032
1033 /*
1034 * Both array and mask data have variable size based
1035 * on the number of cpus and their actual values.
1036 * The size of the 'struct cpu_map_data' is:
1037 *
1038 * array = size of 'struct cpu_map_entries' +
1039 * number of cpus * sizeof(u64)
1040 *
1041 * mask = size of 'struct cpu_map_mask' +
1042 * maximum cpu bit converted to size of longs
1043 *
1044 * and finaly + the size of 'struct cpu_map_data'.
1045 */
1046 size_cpus = cpus_size(map);
1047 size_mask = mask_size(map, max);
1048
1049 if (is_dummy || (size_cpus < size_mask)) {
1050 *size += size_cpus;
1051 *type = PERF_CPU_MAP__CPUS;
1052 } else {
1053 *size += size_mask;
1054 *type = PERF_CPU_MAP__MASK;
1055 }
1056
1057 *size += sizeof(struct cpu_map_data);
1058 return zalloc(*size);
1059}
1060
1061void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map,
1062 u16 type, int max)
1063{
1064 data->type = type;
1065
1066 switch (type) {
1067 case PERF_CPU_MAP__CPUS:
1068 synthesize_cpus((struct cpu_map_entries *) data->data, map);
1069 break;
1070 case PERF_CPU_MAP__MASK:
1071 synthesize_mask((struct cpu_map_mask *) data->data, map, max);
1072 default:
1073 break;
1074 };
1075}
1076
1077static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map)
1078{
1079 size_t size = sizeof(struct cpu_map_event);
1080 struct cpu_map_event *event;
1081 int max;
1082 u16 type;
1083
1084 event = cpu_map_data__alloc(map, &size, &type, &max);
1085 if (!event)
1086 return NULL;
1087
1088 event->header.type = PERF_RECORD_CPU_MAP;
1089 event->header.size = size;
1090 event->data.type = type;
1091
1092 cpu_map_data__synthesize(&event->data, map, type, max);
1093 return event;
1094}
1095
1096int perf_event__synthesize_cpu_map(struct perf_tool *tool,
1097 struct cpu_map *map,
1098 perf_event__handler_t process,
1099 struct machine *machine)
1100{
1101 struct cpu_map_event *event;
1102 int err;
1103
1104 event = cpu_map_event__new(map);
1105 if (!event)
1106 return -ENOMEM;
1107
1108 err = process(tool, (union perf_event *) event, NULL, machine);
1109
1110 free(event);
1111 return err;
1112}
1113
1114int perf_event__synthesize_stat_config(struct perf_tool *tool,
1115 struct perf_stat_config *config,
1116 perf_event__handler_t process,
1117 struct machine *machine)
1118{
1119 struct stat_config_event *event;
1120 int size, i = 0, err;
1121
1122 size = sizeof(*event);
1123 size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
1124
1125 event = zalloc(size);
1126 if (!event)
1127 return -ENOMEM;
1128
1129 event->header.type = PERF_RECORD_STAT_CONFIG;
1130 event->header.size = size;
1131 event->nr = PERF_STAT_CONFIG_TERM__MAX;
1132
1133#define ADD(__term, __val) \
1134 event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \
1135 event->data[i].val = __val; \
1136 i++;
1137
1138 ADD(AGGR_MODE, config->aggr_mode)
1139 ADD(INTERVAL, config->interval)
1140 ADD(SCALE, config->scale)
1141
1142 WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
1143 "stat config terms unbalanced\n");
1144#undef ADD
1145
1146 err = process(tool, (union perf_event *) event, NULL, machine);
1147
1148 free(event);
1149 return err;
1150}
1151
1152int perf_event__synthesize_stat(struct perf_tool *tool,
1153 u32 cpu, u32 thread, u64 id,
1154 struct perf_counts_values *count,
1155 perf_event__handler_t process,
1156 struct machine *machine)
1157{
1158 struct stat_event event;
1159
1160 event.header.type = PERF_RECORD_STAT;
1161 event.header.size = sizeof(event);
1162 event.header.misc = 0;
1163
1164 event.id = id;
1165 event.cpu = cpu;
1166 event.thread = thread;
1167 event.val = count->val;
1168 event.ena = count->ena;
1169 event.run = count->run;
1170
1171 return process(tool, (union perf_event *) &event, NULL, machine);
1172}
1173
1174int perf_event__synthesize_stat_round(struct perf_tool *tool,
1175 u64 evtime, u64 type,
1176 perf_event__handler_t process,
1177 struct machine *machine)
1178{
1179 struct stat_round_event event;
1180
1181 event.header.type = PERF_RECORD_STAT_ROUND;
1182 event.header.size = sizeof(event);
1183 event.header.misc = 0;
1184
1185 event.time = evtime;
1186 event.type = type;
1187
1188 return process(tool, (union perf_event *) &event, NULL, machine);
1189}
1190
1191void perf_event__read_stat_config(struct perf_stat_config *config,
1192 struct stat_config_event *event)
1193{
1194 unsigned i;
1195
1196 for (i = 0; i < event->nr; i++) {
1197
1198 switch (event->data[i].tag) {
1199#define CASE(__term, __val) \
1200 case PERF_STAT_CONFIG_TERM__##__term: \
1201 config->__val = event->data[i].val; \
1202 break;
1203
1204 CASE(AGGR_MODE, aggr_mode)
1205 CASE(SCALE, scale)
1206 CASE(INTERVAL, interval)
1207#undef CASE
1208 default:
1209 pr_warning("unknown stat config term %" PRIu64 "\n",
1210 event->data[i].tag);
1211 }
1212 }
1213}
1214
1215size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
1216{
1217 const char *s;
1218
1219 if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
1220 s = " exec";
1221 else
1222 s = "";
1223
1224 return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
1225}
1226
1227size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
1228{
1229 size_t ret = 0;
1230 struct perf_ns_link_info *ns_link_info;
1231 u32 nr_namespaces, idx;
1232
1233 ns_link_info = event->namespaces.link_info;
1234 nr_namespaces = event->namespaces.nr_namespaces;
1235
1236 ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
1237 event->namespaces.pid,
1238 event->namespaces.tid,
1239 nr_namespaces);
1240
1241 for (idx = 0; idx < nr_namespaces; idx++) {
1242 if (idx && (idx % 4 == 0))
1243 ret += fprintf(fp, "\n\t\t ");
1244
1245 ret += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
1246 perf_ns__name(idx), (u64)ns_link_info[idx].dev,
1247 (u64)ns_link_info[idx].ino,
1248 ((idx + 1) != nr_namespaces) ? ", " : "]\n");
1249 }
1250
1251 return ret;
1252}
1253
1254int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
1255 union perf_event *event,
1256 struct perf_sample *sample,
1257 struct machine *machine)
1258{
1259 return machine__process_comm_event(machine, event, sample);
1260}
1261
1262int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
1263 union perf_event *event,
1264 struct perf_sample *sample,
1265 struct machine *machine)
1266{
1267 return machine__process_namespaces_event(machine, event, sample);
1268}
1269
1270int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
1271 union perf_event *event,
1272 struct perf_sample *sample,
1273 struct machine *machine)
1274{
1275 return machine__process_lost_event(machine, event, sample);
1276}
1277
1278int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
1279 union perf_event *event,
1280 struct perf_sample *sample __maybe_unused,
1281 struct machine *machine)
1282{
1283 return machine__process_aux_event(machine, event);
1284}
1285
1286int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
1287 union perf_event *event,
1288 struct perf_sample *sample __maybe_unused,
1289 struct machine *machine)
1290{
1291 return machine__process_itrace_start_event(machine, event);
1292}
1293
1294int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
1295 union perf_event *event,
1296 struct perf_sample *sample,
1297 struct machine *machine)
1298{
1299 return machine__process_lost_samples_event(machine, event, sample);
1300}
1301
1302int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
1303 union perf_event *event,
1304 struct perf_sample *sample __maybe_unused,
1305 struct machine *machine)
1306{
1307 return machine__process_switch_event(machine, event);
1308}
1309
1310size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1311{
1312 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
1313 event->mmap.pid, event->mmap.tid, event->mmap.start,
1314 event->mmap.len, event->mmap.pgoff,
1315 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1316 event->mmap.filename);
1317}
1318
1319size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1320{
1321 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
1322 " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
1323 event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1324 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1325 event->mmap2.min, event->mmap2.ino,
1326 event->mmap2.ino_generation,
1327 (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1328 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1329 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1330 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1331 event->mmap2.filename);
1332}
1333
1334size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1335{
1336 struct thread_map *threads = thread_map__new_event(&event->thread_map);
1337 size_t ret;
1338
1339 ret = fprintf(fp, " nr: ");
1340
1341 if (threads)
1342 ret += thread_map__fprintf(threads, fp);
1343 else
1344 ret += fprintf(fp, "failed to get threads from event\n");
1345
1346 thread_map__put(threads);
1347 return ret;
1348}
1349
1350size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1351{
1352 struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1353 size_t ret;
1354
1355 ret = fprintf(fp, ": ");
1356
1357 if (cpus)
1358 ret += cpu_map__fprintf(cpus, fp);
1359 else
1360 ret += fprintf(fp, "failed to get cpumap from event\n");
1361
1362 cpu_map__put(cpus);
1363 return ret;
1364}
1365
1366int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1367 union perf_event *event,
1368 struct perf_sample *sample,
1369 struct machine *machine)
1370{
1371 return machine__process_mmap_event(machine, event, sample);
1372}
1373
1374int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1375 union perf_event *event,
1376 struct perf_sample *sample,
1377 struct machine *machine)
1378{
1379 return machine__process_mmap2_event(machine, event, sample);
1380}
1381
1382size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1383{
1384 return fprintf(fp, "(%d:%d):(%d:%d)\n",
1385 event->fork.pid, event->fork.tid,
1386 event->fork.ppid, event->fork.ptid);
1387}
1388
1389int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1390 union perf_event *event,
1391 struct perf_sample *sample,
1392 struct machine *machine)
1393{
1394 return machine__process_fork_event(machine, event, sample);
1395}
1396
1397int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1398 union perf_event *event,
1399 struct perf_sample *sample,
1400 struct machine *machine)
1401{
1402 return machine__process_exit_event(machine, event, sample);
1403}
1404
1405size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1406{
1407 return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s%s]\n",
1408 event->aux.aux_offset, event->aux.aux_size,
1409 event->aux.flags,
1410 event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1411 event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
1412 event->aux.flags & PERF_AUX_FLAG_PARTIAL ? "P" : "");
1413}
1414
1415size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1416{
1417 return fprintf(fp, " pid: %u tid: %u\n",
1418 event->itrace_start.pid, event->itrace_start.tid);
1419}
1420
1421size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1422{
1423 bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1424 const char *in_out = !out ? "IN " :
1425 !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
1426 "OUT " : "OUT preempt";
1427
1428 if (event->header.type == PERF_RECORD_SWITCH)
1429 return fprintf(fp, " %s\n", in_out);
1430
1431 return fprintf(fp, " %s %s pid/tid: %5u/%-5u\n",
1432 in_out, out ? "next" : "prev",
1433 event->context_switch.next_prev_pid,
1434 event->context_switch.next_prev_tid);
1435}
1436
1437static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
1438{
1439 return fprintf(fp, " lost %" PRIu64 "\n", event->lost.lost);
1440}
1441
1442size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1443{
1444 size_t ret = fprintf(fp, "PERF_RECORD_%s",
1445 perf_event__name(event->header.type));
1446
1447 switch (event->header.type) {
1448 case PERF_RECORD_COMM:
1449 ret += perf_event__fprintf_comm(event, fp);
1450 break;
1451 case PERF_RECORD_FORK:
1452 case PERF_RECORD_EXIT:
1453 ret += perf_event__fprintf_task(event, fp);
1454 break;
1455 case PERF_RECORD_MMAP:
1456 ret += perf_event__fprintf_mmap(event, fp);
1457 break;
1458 case PERF_RECORD_NAMESPACES:
1459 ret += perf_event__fprintf_namespaces(event, fp);
1460 break;
1461 case PERF_RECORD_MMAP2:
1462 ret += perf_event__fprintf_mmap2(event, fp);
1463 break;
1464 case PERF_RECORD_AUX:
1465 ret += perf_event__fprintf_aux(event, fp);
1466 break;
1467 case PERF_RECORD_ITRACE_START:
1468 ret += perf_event__fprintf_itrace_start(event, fp);
1469 break;
1470 case PERF_RECORD_SWITCH:
1471 case PERF_RECORD_SWITCH_CPU_WIDE:
1472 ret += perf_event__fprintf_switch(event, fp);
1473 break;
1474 case PERF_RECORD_LOST:
1475 ret += perf_event__fprintf_lost(event, fp);
1476 break;
1477 default:
1478 ret += fprintf(fp, "\n");
1479 }
1480
1481 return ret;
1482}
1483
1484int perf_event__process(struct perf_tool *tool __maybe_unused,
1485 union perf_event *event,
1486 struct perf_sample *sample,
1487 struct machine *machine)
1488{
1489 return machine__process_event(machine, event, sample);
1490}
1491
1492void thread__find_addr_map(struct thread *thread, u8 cpumode,
1493 enum map_type type, u64 addr,
1494 struct addr_location *al)
1495{
1496 struct map_groups *mg = thread->mg;
1497 struct machine *machine = mg->machine;
1498 bool load_map = false;
1499
1500 al->machine = machine;
1501 al->thread = thread;
1502 al->addr = addr;
1503 al->cpumode = cpumode;
1504 al->filtered = 0;
1505
1506 if (machine == NULL) {
1507 al->map = NULL;
1508 return;
1509 }
1510
1511 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1512 al->level = 'k';
1513 mg = &machine->kmaps;
1514 load_map = true;
1515 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1516 al->level = '.';
1517 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1518 al->level = 'g';
1519 mg = &machine->kmaps;
1520 load_map = true;
1521 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1522 al->level = 'u';
1523 } else {
1524 al->level = 'H';
1525 al->map = NULL;
1526
1527 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1528 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1529 !perf_guest)
1530 al->filtered |= (1 << HIST_FILTER__GUEST);
1531 if ((cpumode == PERF_RECORD_MISC_USER ||
1532 cpumode == PERF_RECORD_MISC_KERNEL) &&
1533 !perf_host)
1534 al->filtered |= (1 << HIST_FILTER__HOST);
1535
1536 return;
1537 }
1538try_again:
1539 al->map = map_groups__find(mg, type, al->addr);
1540 if (al->map == NULL) {
1541 /*
1542 * If this is outside of all known maps, and is a negative
1543 * address, try to look it up in the kernel dso, as it might be
1544 * a vsyscall or vdso (which executes in user-mode).
1545 *
1546 * XXX This is nasty, we should have a symbol list in the
1547 * "[vdso]" dso, but for now lets use the old trick of looking
1548 * in the whole kernel symbol list.
1549 */
1550 if (cpumode == PERF_RECORD_MISC_USER && machine &&
1551 mg != &machine->kmaps &&
1552 machine__kernel_ip(machine, al->addr)) {
1553 mg = &machine->kmaps;
1554 load_map = true;
1555 goto try_again;
1556 }
1557 } else {
1558 /*
1559 * Kernel maps might be changed when loading symbols so loading
1560 * must be done prior to using kernel maps.
1561 */
1562 if (load_map)
1563 map__load(al->map);
1564 al->addr = al->map->map_ip(al->map, al->addr);
1565 }
1566}
1567
1568void thread__find_addr_location(struct thread *thread,
1569 u8 cpumode, enum map_type type, u64 addr,
1570 struct addr_location *al)
1571{
1572 thread__find_addr_map(thread, cpumode, type, addr, al);
1573 if (al->map != NULL)
1574 al->sym = map__find_symbol(al->map, al->addr);
1575 else
1576 al->sym = NULL;
1577}
1578
1579/*
1580 * Callers need to drop the reference to al->thread, obtained in
1581 * machine__findnew_thread()
1582 */
1583int machine__resolve(struct machine *machine, struct addr_location *al,
1584 struct perf_sample *sample)
1585{
1586 struct thread *thread = machine__findnew_thread(machine, sample->pid,
1587 sample->tid);
1588
1589 if (thread == NULL)
1590 return -1;
1591
1592 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1593 thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->ip, al);
1594 dump_printf(" ...... dso: %s\n",
1595 al->map ? al->map->dso->long_name :
1596 al->level == 'H' ? "[hypervisor]" : "<not found>");
1597
1598 if (thread__is_filtered(thread))
1599 al->filtered |= (1 << HIST_FILTER__THREAD);
1600
1601 al->sym = NULL;
1602 al->cpu = sample->cpu;
1603 al->socket = -1;
1604 al->srcline = NULL;
1605
1606 if (al->cpu >= 0) {
1607 struct perf_env *env = machine->env;
1608
1609 if (env && env->cpu)
1610 al->socket = env->cpu[al->cpu].socket_id;
1611 }
1612
1613 if (al->map) {
1614 struct dso *dso = al->map->dso;
1615
1616 if (symbol_conf.dso_list &&
1617 (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1618 dso->short_name) ||
1619 (dso->short_name != dso->long_name &&
1620 strlist__has_entry(symbol_conf.dso_list,
1621 dso->long_name))))) {
1622 al->filtered |= (1 << HIST_FILTER__DSO);
1623 }
1624
1625 al->sym = map__find_symbol(al->map, al->addr);
1626 }
1627
1628 if (symbol_conf.sym_list &&
1629 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1630 al->sym->name))) {
1631 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1632 }
1633
1634 return 0;
1635}
1636
1637/*
1638 * The preprocess_sample method will return with reference counts for the
1639 * in it, when done using (and perhaps getting ref counts if needing to
1640 * keep a pointer to one of those entries) it must be paired with
1641 * addr_location__put(), so that the refcounts can be decremented.
1642 */
1643void addr_location__put(struct addr_location *al)
1644{
1645 thread__zput(al->thread);
1646}
1647
1648bool is_bts_event(struct perf_event_attr *attr)
1649{
1650 return attr->type == PERF_TYPE_HARDWARE &&
1651 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1652 attr->sample_period == 1;
1653}
1654
1655bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1656{
1657 if (attr->type == PERF_TYPE_SOFTWARE &&
1658 (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1659 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1660 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1661 return true;
1662
1663 if (is_bts_event(attr))
1664 return true;
1665
1666 return false;
1667}
1668
1669void thread__resolve(struct thread *thread, struct addr_location *al,
1670 struct perf_sample *sample)
1671{
1672 thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->addr, al);
1673 if (!al->map)
1674 thread__find_addr_map(thread, sample->cpumode, MAP__VARIABLE,
1675 sample->addr, al);
1676
1677 al->cpu = sample->cpu;
1678 al->sym = NULL;
1679
1680 if (al->map)
1681 al->sym = map__find_symbol(al->map, al->addr);
1682}
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}