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1// SPDX-License-Identifier: GPL-2.0-only
2
3#include "util/debug.h"
4#include "util/dso.h"
5#include "util/event.h"
6#include "util/evlist.h"
7#include "util/machine.h"
8#include "util/map.h"
9#include "util/map_symbol.h"
10#include "util/branch.h"
11#include "util/memswap.h"
12#include "util/namespaces.h"
13#include "util/session.h"
14#include "util/stat.h"
15#include "util/symbol.h"
16#include "util/synthetic-events.h"
17#include "util/target.h"
18#include "util/time-utils.h"
19#include <linux/bitops.h>
20#include <linux/kernel.h>
21#include <linux/string.h>
22#include <linux/zalloc.h>
23#include <linux/perf_event.h>
24#include <asm/bug.h>
25#include <perf/evsel.h>
26#include <internal/cpumap.h>
27#include <perf/cpumap.h>
28#include <internal/lib.h> // page_size
29#include <internal/threadmap.h>
30#include <perf/threadmap.h>
31#include <symbol/kallsyms.h>
32#include <dirent.h>
33#include <errno.h>
34#include <inttypes.h>
35#include <stdio.h>
36#include <string.h>
37#include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
38#include <api/fs/fs.h>
39#include <sys/types.h>
40#include <sys/stat.h>
41#include <fcntl.h>
42#include <unistd.h>
43
44#define DEFAULT_PROC_MAP_PARSE_TIMEOUT 500
45
46unsigned int proc_map_timeout = DEFAULT_PROC_MAP_PARSE_TIMEOUT;
47
48int perf_tool__process_synth_event(struct perf_tool *tool,
49 union perf_event *event,
50 struct machine *machine,
51 perf_event__handler_t process)
52{
53 struct perf_sample synth_sample = {
54 .pid = -1,
55 .tid = -1,
56 .time = -1,
57 .stream_id = -1,
58 .cpu = -1,
59 .period = 1,
60 .cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
61 };
62
63 return process(tool, event, &synth_sample, machine);
64};
65
66/*
67 * Assumes that the first 4095 bytes of /proc/pid/stat contains
68 * the comm, tgid and ppid.
69 */
70static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
71 pid_t *tgid, pid_t *ppid)
72{
73 char filename[PATH_MAX];
74 char bf[4096];
75 int fd;
76 size_t size = 0;
77 ssize_t n;
78 char *name, *tgids, *ppids;
79
80 *tgid = -1;
81 *ppid = -1;
82
83 snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
84
85 fd = open(filename, O_RDONLY);
86 if (fd < 0) {
87 pr_debug("couldn't open %s\n", filename);
88 return -1;
89 }
90
91 n = read(fd, bf, sizeof(bf) - 1);
92 close(fd);
93 if (n <= 0) {
94 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
95 pid);
96 return -1;
97 }
98 bf[n] = '\0';
99
100 name = strstr(bf, "Name:");
101 tgids = strstr(bf, "Tgid:");
102 ppids = strstr(bf, "PPid:");
103
104 if (name) {
105 char *nl;
106
107 name = skip_spaces(name + 5); /* strlen("Name:") */
108 nl = strchr(name, '\n');
109 if (nl)
110 *nl = '\0';
111
112 size = strlen(name);
113 if (size >= len)
114 size = len - 1;
115 memcpy(comm, name, size);
116 comm[size] = '\0';
117 } else {
118 pr_debug("Name: string not found for pid %d\n", pid);
119 }
120
121 if (tgids) {
122 tgids += 5; /* strlen("Tgid:") */
123 *tgid = atoi(tgids);
124 } else {
125 pr_debug("Tgid: string not found for pid %d\n", pid);
126 }
127
128 if (ppids) {
129 ppids += 5; /* strlen("PPid:") */
130 *ppid = atoi(ppids);
131 } else {
132 pr_debug("PPid: string not found for pid %d\n", pid);
133 }
134
135 return 0;
136}
137
138static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
139 struct machine *machine,
140 pid_t *tgid, pid_t *ppid)
141{
142 size_t size;
143
144 *ppid = -1;
145
146 memset(&event->comm, 0, sizeof(event->comm));
147
148 if (machine__is_host(machine)) {
149 if (perf_event__get_comm_ids(pid, event->comm.comm,
150 sizeof(event->comm.comm),
151 tgid, ppid) != 0) {
152 return -1;
153 }
154 } else {
155 *tgid = machine->pid;
156 }
157
158 if (*tgid < 0)
159 return -1;
160
161 event->comm.pid = *tgid;
162 event->comm.header.type = PERF_RECORD_COMM;
163
164 size = strlen(event->comm.comm) + 1;
165 size = PERF_ALIGN(size, sizeof(u64));
166 memset(event->comm.comm + size, 0, machine->id_hdr_size);
167 event->comm.header.size = (sizeof(event->comm) -
168 (sizeof(event->comm.comm) - size) +
169 machine->id_hdr_size);
170 event->comm.tid = pid;
171
172 return 0;
173}
174
175pid_t perf_event__synthesize_comm(struct perf_tool *tool,
176 union perf_event *event, pid_t pid,
177 perf_event__handler_t process,
178 struct machine *machine)
179{
180 pid_t tgid, ppid;
181
182 if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
183 return -1;
184
185 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
186 return -1;
187
188 return tgid;
189}
190
191static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
192 struct perf_ns_link_info *ns_link_info)
193{
194 struct stat64 st;
195 char proc_ns[128];
196
197 sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
198 if (stat64(proc_ns, &st) == 0) {
199 ns_link_info->dev = st.st_dev;
200 ns_link_info->ino = st.st_ino;
201 }
202}
203
204int perf_event__synthesize_namespaces(struct perf_tool *tool,
205 union perf_event *event,
206 pid_t pid, pid_t tgid,
207 perf_event__handler_t process,
208 struct machine *machine)
209{
210 u32 idx;
211 struct perf_ns_link_info *ns_link_info;
212
213 if (!tool || !tool->namespace_events)
214 return 0;
215
216 memset(&event->namespaces, 0, (sizeof(event->namespaces) +
217 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
218 machine->id_hdr_size));
219
220 event->namespaces.pid = tgid;
221 event->namespaces.tid = pid;
222
223 event->namespaces.nr_namespaces = NR_NAMESPACES;
224
225 ns_link_info = event->namespaces.link_info;
226
227 for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
228 perf_event__get_ns_link_info(pid, perf_ns__name(idx),
229 &ns_link_info[idx]);
230
231 event->namespaces.header.type = PERF_RECORD_NAMESPACES;
232
233 event->namespaces.header.size = (sizeof(event->namespaces) +
234 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
235 machine->id_hdr_size);
236
237 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
238 return -1;
239
240 return 0;
241}
242
243static int perf_event__synthesize_fork(struct perf_tool *tool,
244 union perf_event *event,
245 pid_t pid, pid_t tgid, pid_t ppid,
246 perf_event__handler_t process,
247 struct machine *machine)
248{
249 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
250
251 /*
252 * for main thread set parent to ppid from status file. For other
253 * threads set parent pid to main thread. ie., assume main thread
254 * spawns all threads in a process
255 */
256 if (tgid == pid) {
257 event->fork.ppid = ppid;
258 event->fork.ptid = ppid;
259 } else {
260 event->fork.ppid = tgid;
261 event->fork.ptid = tgid;
262 }
263 event->fork.pid = tgid;
264 event->fork.tid = pid;
265 event->fork.header.type = PERF_RECORD_FORK;
266 event->fork.header.misc = PERF_RECORD_MISC_FORK_EXEC;
267
268 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
269
270 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
271 return -1;
272
273 return 0;
274}
275
276int perf_event__synthesize_mmap_events(struct perf_tool *tool,
277 union perf_event *event,
278 pid_t pid, pid_t tgid,
279 perf_event__handler_t process,
280 struct machine *machine,
281 bool mmap_data)
282{
283 char filename[PATH_MAX];
284 FILE *fp;
285 unsigned long long t;
286 bool truncation = false;
287 unsigned long long timeout = proc_map_timeout * 1000000ULL;
288 int rc = 0;
289 const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
290 int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
291
292 if (machine__is_default_guest(machine))
293 return 0;
294
295 snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps",
296 machine->root_dir, pid, pid);
297
298 fp = fopen(filename, "r");
299 if (fp == NULL) {
300 /*
301 * We raced with a task exiting - just return:
302 */
303 pr_debug("couldn't open %s\n", filename);
304 return -1;
305 }
306
307 event->header.type = PERF_RECORD_MMAP2;
308 t = rdclock();
309
310 while (1) {
311 char bf[BUFSIZ];
312 char prot[5];
313 char execname[PATH_MAX];
314 char anonstr[] = "//anon";
315 unsigned int ino;
316 size_t size;
317 ssize_t n;
318
319 if (fgets(bf, sizeof(bf), fp) == NULL)
320 break;
321
322 if ((rdclock() - t) > timeout) {
323 pr_warning("Reading %s time out. "
324 "You may want to increase "
325 "the time limit by --proc-map-timeout\n",
326 filename);
327 truncation = true;
328 goto out;
329 }
330
331 /* ensure null termination since stack will be reused. */
332 strcpy(execname, "");
333
334 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
335 n = sscanf(bf, "%"PRI_lx64"-%"PRI_lx64" %s %"PRI_lx64" %x:%x %u %[^\n]\n",
336 &event->mmap2.start, &event->mmap2.len, prot,
337 &event->mmap2.pgoff, &event->mmap2.maj,
338 &event->mmap2.min,
339 &ino, execname);
340
341 /*
342 * Anon maps don't have the execname.
343 */
344 if (n < 7)
345 continue;
346
347 event->mmap2.ino = (u64)ino;
348
349 /*
350 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
351 */
352 if (machine__is_host(machine))
353 event->header.misc = PERF_RECORD_MISC_USER;
354 else
355 event->header.misc = PERF_RECORD_MISC_GUEST_USER;
356
357 /* map protection and flags bits */
358 event->mmap2.prot = 0;
359 event->mmap2.flags = 0;
360 if (prot[0] == 'r')
361 event->mmap2.prot |= PROT_READ;
362 if (prot[1] == 'w')
363 event->mmap2.prot |= PROT_WRITE;
364 if (prot[2] == 'x')
365 event->mmap2.prot |= PROT_EXEC;
366
367 if (prot[3] == 's')
368 event->mmap2.flags |= MAP_SHARED;
369 else
370 event->mmap2.flags |= MAP_PRIVATE;
371
372 if (prot[2] != 'x') {
373 if (!mmap_data || prot[0] != 'r')
374 continue;
375
376 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
377 }
378
379out:
380 if (truncation)
381 event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
382
383 if (!strcmp(execname, ""))
384 strcpy(execname, anonstr);
385
386 if (hugetlbfs_mnt_len &&
387 !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) {
388 strcpy(execname, anonstr);
389 event->mmap2.flags |= MAP_HUGETLB;
390 }
391
392 size = strlen(execname) + 1;
393 memcpy(event->mmap2.filename, execname, size);
394 size = PERF_ALIGN(size, sizeof(u64));
395 event->mmap2.len -= event->mmap.start;
396 event->mmap2.header.size = (sizeof(event->mmap2) -
397 (sizeof(event->mmap2.filename) - size));
398 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
399 event->mmap2.header.size += machine->id_hdr_size;
400 event->mmap2.pid = tgid;
401 event->mmap2.tid = pid;
402
403 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
404 rc = -1;
405 break;
406 }
407
408 if (truncation)
409 break;
410 }
411
412 fclose(fp);
413 return rc;
414}
415
416int perf_event__synthesize_modules(struct perf_tool *tool, perf_event__handler_t process,
417 struct machine *machine)
418{
419 int rc = 0;
420 struct map *pos;
421 struct maps *maps = machine__kernel_maps(machine);
422 union perf_event *event = zalloc((sizeof(event->mmap) +
423 machine->id_hdr_size));
424 if (event == NULL) {
425 pr_debug("Not enough memory synthesizing mmap event "
426 "for kernel modules\n");
427 return -1;
428 }
429
430 event->header.type = PERF_RECORD_MMAP;
431
432 /*
433 * kernel uses 0 for user space maps, see kernel/perf_event.c
434 * __perf_event_mmap
435 */
436 if (machine__is_host(machine))
437 event->header.misc = PERF_RECORD_MISC_KERNEL;
438 else
439 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
440
441 for (pos = maps__first(maps); pos; pos = map__next(pos)) {
442 size_t size;
443
444 if (!__map__is_kmodule(pos))
445 continue;
446
447 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
448 event->mmap.header.type = PERF_RECORD_MMAP;
449 event->mmap.header.size = (sizeof(event->mmap) -
450 (sizeof(event->mmap.filename) - size));
451 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
452 event->mmap.header.size += machine->id_hdr_size;
453 event->mmap.start = pos->start;
454 event->mmap.len = pos->end - pos->start;
455 event->mmap.pid = machine->pid;
456
457 memcpy(event->mmap.filename, pos->dso->long_name,
458 pos->dso->long_name_len + 1);
459 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
460 rc = -1;
461 break;
462 }
463 }
464
465 free(event);
466 return rc;
467}
468
469static int __event__synthesize_thread(union perf_event *comm_event,
470 union perf_event *mmap_event,
471 union perf_event *fork_event,
472 union perf_event *namespaces_event,
473 pid_t pid, int full, perf_event__handler_t process,
474 struct perf_tool *tool, struct machine *machine, bool mmap_data)
475{
476 char filename[PATH_MAX];
477 DIR *tasks;
478 struct dirent *dirent;
479 pid_t tgid, ppid;
480 int rc = 0;
481
482 /* special case: only send one comm event using passed in pid */
483 if (!full) {
484 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
485 process, machine);
486
487 if (tgid == -1)
488 return -1;
489
490 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
491 tgid, process, machine) < 0)
492 return -1;
493
494 /*
495 * send mmap only for thread group leader
496 * see thread__init_map_groups
497 */
498 if (pid == tgid &&
499 perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
500 process, machine, mmap_data))
501 return -1;
502
503 return 0;
504 }
505
506 if (machine__is_default_guest(machine))
507 return 0;
508
509 snprintf(filename, sizeof(filename), "%s/proc/%d/task",
510 machine->root_dir, pid);
511
512 tasks = opendir(filename);
513 if (tasks == NULL) {
514 pr_debug("couldn't open %s\n", filename);
515 return 0;
516 }
517
518 while ((dirent = readdir(tasks)) != NULL) {
519 char *end;
520 pid_t _pid;
521
522 _pid = strtol(dirent->d_name, &end, 10);
523 if (*end)
524 continue;
525
526 rc = -1;
527 if (perf_event__prepare_comm(comm_event, _pid, machine,
528 &tgid, &ppid) != 0)
529 break;
530
531 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
532 ppid, process, machine) < 0)
533 break;
534
535 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
536 tgid, process, machine) < 0)
537 break;
538
539 /*
540 * Send the prepared comm event
541 */
542 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
543 break;
544
545 rc = 0;
546 if (_pid == pid) {
547 /* process the parent's maps too */
548 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
549 process, machine, mmap_data);
550 if (rc)
551 break;
552 }
553 }
554
555 closedir(tasks);
556 return rc;
557}
558
559int perf_event__synthesize_thread_map(struct perf_tool *tool,
560 struct perf_thread_map *threads,
561 perf_event__handler_t process,
562 struct machine *machine,
563 bool mmap_data)
564{
565 union perf_event *comm_event, *mmap_event, *fork_event;
566 union perf_event *namespaces_event;
567 int err = -1, thread, j;
568
569 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
570 if (comm_event == NULL)
571 goto out;
572
573 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
574 if (mmap_event == NULL)
575 goto out_free_comm;
576
577 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
578 if (fork_event == NULL)
579 goto out_free_mmap;
580
581 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
582 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
583 machine->id_hdr_size);
584 if (namespaces_event == NULL)
585 goto out_free_fork;
586
587 err = 0;
588 for (thread = 0; thread < threads->nr; ++thread) {
589 if (__event__synthesize_thread(comm_event, mmap_event,
590 fork_event, namespaces_event,
591 perf_thread_map__pid(threads, thread), 0,
592 process, tool, machine,
593 mmap_data)) {
594 err = -1;
595 break;
596 }
597
598 /*
599 * comm.pid is set to thread group id by
600 * perf_event__synthesize_comm
601 */
602 if ((int) comm_event->comm.pid != perf_thread_map__pid(threads, thread)) {
603 bool need_leader = true;
604
605 /* is thread group leader in thread_map? */
606 for (j = 0; j < threads->nr; ++j) {
607 if ((int) comm_event->comm.pid == perf_thread_map__pid(threads, j)) {
608 need_leader = false;
609 break;
610 }
611 }
612
613 /* if not, generate events for it */
614 if (need_leader &&
615 __event__synthesize_thread(comm_event, mmap_event,
616 fork_event, namespaces_event,
617 comm_event->comm.pid, 0,
618 process, tool, machine,
619 mmap_data)) {
620 err = -1;
621 break;
622 }
623 }
624 }
625 free(namespaces_event);
626out_free_fork:
627 free(fork_event);
628out_free_mmap:
629 free(mmap_event);
630out_free_comm:
631 free(comm_event);
632out:
633 return err;
634}
635
636static int __perf_event__synthesize_threads(struct perf_tool *tool,
637 perf_event__handler_t process,
638 struct machine *machine,
639 bool mmap_data,
640 struct dirent **dirent,
641 int start,
642 int num)
643{
644 union perf_event *comm_event, *mmap_event, *fork_event;
645 union perf_event *namespaces_event;
646 int err = -1;
647 char *end;
648 pid_t pid;
649 int i;
650
651 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
652 if (comm_event == NULL)
653 goto out;
654
655 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
656 if (mmap_event == NULL)
657 goto out_free_comm;
658
659 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
660 if (fork_event == NULL)
661 goto out_free_mmap;
662
663 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
664 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
665 machine->id_hdr_size);
666 if (namespaces_event == NULL)
667 goto out_free_fork;
668
669 for (i = start; i < start + num; i++) {
670 if (!isdigit(dirent[i]->d_name[0]))
671 continue;
672
673 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
674 /* only interested in proper numerical dirents */
675 if (*end)
676 continue;
677 /*
678 * We may race with exiting thread, so don't stop just because
679 * one thread couldn't be synthesized.
680 */
681 __event__synthesize_thread(comm_event, mmap_event, fork_event,
682 namespaces_event, pid, 1, process,
683 tool, machine, mmap_data);
684 }
685 err = 0;
686
687 free(namespaces_event);
688out_free_fork:
689 free(fork_event);
690out_free_mmap:
691 free(mmap_event);
692out_free_comm:
693 free(comm_event);
694out:
695 return err;
696}
697
698struct synthesize_threads_arg {
699 struct perf_tool *tool;
700 perf_event__handler_t process;
701 struct machine *machine;
702 bool mmap_data;
703 struct dirent **dirent;
704 int num;
705 int start;
706};
707
708static void *synthesize_threads_worker(void *arg)
709{
710 struct synthesize_threads_arg *args = arg;
711
712 __perf_event__synthesize_threads(args->tool, args->process,
713 args->machine, args->mmap_data,
714 args->dirent,
715 args->start, args->num);
716 return NULL;
717}
718
719int perf_event__synthesize_threads(struct perf_tool *tool,
720 perf_event__handler_t process,
721 struct machine *machine,
722 bool mmap_data,
723 unsigned int nr_threads_synthesize)
724{
725 struct synthesize_threads_arg *args = NULL;
726 pthread_t *synthesize_threads = NULL;
727 char proc_path[PATH_MAX];
728 struct dirent **dirent;
729 int num_per_thread;
730 int m, n, i, j;
731 int thread_nr;
732 int base = 0;
733 int err = -1;
734
735
736 if (machine__is_default_guest(machine))
737 return 0;
738
739 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
740 n = scandir(proc_path, &dirent, 0, alphasort);
741 if (n < 0)
742 return err;
743
744 if (nr_threads_synthesize == UINT_MAX)
745 thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
746 else
747 thread_nr = nr_threads_synthesize;
748
749 if (thread_nr <= 1) {
750 err = __perf_event__synthesize_threads(tool, process,
751 machine, mmap_data,
752 dirent, base, n);
753 goto free_dirent;
754 }
755 if (thread_nr > n)
756 thread_nr = n;
757
758 synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
759 if (synthesize_threads == NULL)
760 goto free_dirent;
761
762 args = calloc(sizeof(*args), thread_nr);
763 if (args == NULL)
764 goto free_threads;
765
766 num_per_thread = n / thread_nr;
767 m = n % thread_nr;
768 for (i = 0; i < thread_nr; i++) {
769 args[i].tool = tool;
770 args[i].process = process;
771 args[i].machine = machine;
772 args[i].mmap_data = mmap_data;
773 args[i].dirent = dirent;
774 }
775 for (i = 0; i < m; i++) {
776 args[i].num = num_per_thread + 1;
777 args[i].start = i * args[i].num;
778 }
779 if (i != 0)
780 base = args[i-1].start + args[i-1].num;
781 for (j = i; j < thread_nr; j++) {
782 args[j].num = num_per_thread;
783 args[j].start = base + (j - i) * args[i].num;
784 }
785
786 for (i = 0; i < thread_nr; i++) {
787 if (pthread_create(&synthesize_threads[i], NULL,
788 synthesize_threads_worker, &args[i]))
789 goto out_join;
790 }
791 err = 0;
792out_join:
793 for (i = 0; i < thread_nr; i++)
794 pthread_join(synthesize_threads[i], NULL);
795 free(args);
796free_threads:
797 free(synthesize_threads);
798free_dirent:
799 for (i = 0; i < n; i++)
800 zfree(&dirent[i]);
801 free(dirent);
802
803 return err;
804}
805
806int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused,
807 perf_event__handler_t process __maybe_unused,
808 struct machine *machine __maybe_unused)
809{
810 return 0;
811}
812
813static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
814 perf_event__handler_t process,
815 struct machine *machine)
816{
817 size_t size;
818 struct map *map = machine__kernel_map(machine);
819 struct kmap *kmap;
820 int err;
821 union perf_event *event;
822
823 if (map == NULL)
824 return -1;
825
826 kmap = map__kmap(map);
827 if (!kmap->ref_reloc_sym)
828 return -1;
829
830 /*
831 * We should get this from /sys/kernel/sections/.text, but till that is
832 * available use this, and after it is use this as a fallback for older
833 * kernels.
834 */
835 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
836 if (event == NULL) {
837 pr_debug("Not enough memory synthesizing mmap event "
838 "for kernel modules\n");
839 return -1;
840 }
841
842 if (machine__is_host(machine)) {
843 /*
844 * kernel uses PERF_RECORD_MISC_USER for user space maps,
845 * see kernel/perf_event.c __perf_event_mmap
846 */
847 event->header.misc = PERF_RECORD_MISC_KERNEL;
848 } else {
849 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
850 }
851
852 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
853 "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
854 size = PERF_ALIGN(size, sizeof(u64));
855 event->mmap.header.type = PERF_RECORD_MMAP;
856 event->mmap.header.size = (sizeof(event->mmap) -
857 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
858 event->mmap.pgoff = kmap->ref_reloc_sym->addr;
859 event->mmap.start = map->start;
860 event->mmap.len = map->end - event->mmap.start;
861 event->mmap.pid = machine->pid;
862
863 err = perf_tool__process_synth_event(tool, event, machine, process);
864 free(event);
865
866 return err;
867}
868
869int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
870 perf_event__handler_t process,
871 struct machine *machine)
872{
873 int err;
874
875 err = __perf_event__synthesize_kernel_mmap(tool, process, machine);
876 if (err < 0)
877 return err;
878
879 return perf_event__synthesize_extra_kmaps(tool, process, machine);
880}
881
882int perf_event__synthesize_thread_map2(struct perf_tool *tool,
883 struct perf_thread_map *threads,
884 perf_event__handler_t process,
885 struct machine *machine)
886{
887 union perf_event *event;
888 int i, err, size;
889
890 size = sizeof(event->thread_map);
891 size += threads->nr * sizeof(event->thread_map.entries[0]);
892
893 event = zalloc(size);
894 if (!event)
895 return -ENOMEM;
896
897 event->header.type = PERF_RECORD_THREAD_MAP;
898 event->header.size = size;
899 event->thread_map.nr = threads->nr;
900
901 for (i = 0; i < threads->nr; i++) {
902 struct perf_record_thread_map_entry *entry = &event->thread_map.entries[i];
903 char *comm = perf_thread_map__comm(threads, i);
904
905 if (!comm)
906 comm = (char *) "";
907
908 entry->pid = perf_thread_map__pid(threads, i);
909 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
910 }
911
912 err = process(tool, event, NULL, machine);
913
914 free(event);
915 return err;
916}
917
918static void synthesize_cpus(struct cpu_map_entries *cpus,
919 struct perf_cpu_map *map)
920{
921 int i;
922
923 cpus->nr = map->nr;
924
925 for (i = 0; i < map->nr; i++)
926 cpus->cpu[i] = map->map[i];
927}
928
929static void synthesize_mask(struct perf_record_record_cpu_map *mask,
930 struct perf_cpu_map *map, int max)
931{
932 int i;
933
934 mask->nr = BITS_TO_LONGS(max);
935 mask->long_size = sizeof(long);
936
937 for (i = 0; i < map->nr; i++)
938 set_bit(map->map[i], mask->mask);
939}
940
941static size_t cpus_size(struct perf_cpu_map *map)
942{
943 return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
944}
945
946static size_t mask_size(struct perf_cpu_map *map, int *max)
947{
948 int i;
949
950 *max = 0;
951
952 for (i = 0; i < map->nr; i++) {
953 /* bit possition of the cpu is + 1 */
954 int bit = map->map[i] + 1;
955
956 if (bit > *max)
957 *max = bit;
958 }
959
960 return sizeof(struct perf_record_record_cpu_map) + BITS_TO_LONGS(*max) * sizeof(long);
961}
962
963void *cpu_map_data__alloc(struct perf_cpu_map *map, size_t *size, u16 *type, int *max)
964{
965 size_t size_cpus, size_mask;
966 bool is_dummy = perf_cpu_map__empty(map);
967
968 /*
969 * Both array and mask data have variable size based
970 * on the number of cpus and their actual values.
971 * The size of the 'struct perf_record_cpu_map_data' is:
972 *
973 * array = size of 'struct cpu_map_entries' +
974 * number of cpus * sizeof(u64)
975 *
976 * mask = size of 'struct perf_record_record_cpu_map' +
977 * maximum cpu bit converted to size of longs
978 *
979 * and finaly + the size of 'struct perf_record_cpu_map_data'.
980 */
981 size_cpus = cpus_size(map);
982 size_mask = mask_size(map, max);
983
984 if (is_dummy || (size_cpus < size_mask)) {
985 *size += size_cpus;
986 *type = PERF_CPU_MAP__CPUS;
987 } else {
988 *size += size_mask;
989 *type = PERF_CPU_MAP__MASK;
990 }
991
992 *size += sizeof(struct perf_record_cpu_map_data);
993 *size = PERF_ALIGN(*size, sizeof(u64));
994 return zalloc(*size);
995}
996
997void cpu_map_data__synthesize(struct perf_record_cpu_map_data *data, struct perf_cpu_map *map,
998 u16 type, int max)
999{
1000 data->type = type;
1001
1002 switch (type) {
1003 case PERF_CPU_MAP__CPUS:
1004 synthesize_cpus((struct cpu_map_entries *) data->data, map);
1005 break;
1006 case PERF_CPU_MAP__MASK:
1007 synthesize_mask((struct perf_record_record_cpu_map *)data->data, map, max);
1008 default:
1009 break;
1010 };
1011}
1012
1013static struct perf_record_cpu_map *cpu_map_event__new(struct perf_cpu_map *map)
1014{
1015 size_t size = sizeof(struct perf_record_cpu_map);
1016 struct perf_record_cpu_map *event;
1017 int max;
1018 u16 type;
1019
1020 event = cpu_map_data__alloc(map, &size, &type, &max);
1021 if (!event)
1022 return NULL;
1023
1024 event->header.type = PERF_RECORD_CPU_MAP;
1025 event->header.size = size;
1026 event->data.type = type;
1027
1028 cpu_map_data__synthesize(&event->data, map, type, max);
1029 return event;
1030}
1031
1032int perf_event__synthesize_cpu_map(struct perf_tool *tool,
1033 struct perf_cpu_map *map,
1034 perf_event__handler_t process,
1035 struct machine *machine)
1036{
1037 struct perf_record_cpu_map *event;
1038 int err;
1039
1040 event = cpu_map_event__new(map);
1041 if (!event)
1042 return -ENOMEM;
1043
1044 err = process(tool, (union perf_event *) event, NULL, machine);
1045
1046 free(event);
1047 return err;
1048}
1049
1050int perf_event__synthesize_stat_config(struct perf_tool *tool,
1051 struct perf_stat_config *config,
1052 perf_event__handler_t process,
1053 struct machine *machine)
1054{
1055 struct perf_record_stat_config *event;
1056 int size, i = 0, err;
1057
1058 size = sizeof(*event);
1059 size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
1060
1061 event = zalloc(size);
1062 if (!event)
1063 return -ENOMEM;
1064
1065 event->header.type = PERF_RECORD_STAT_CONFIG;
1066 event->header.size = size;
1067 event->nr = PERF_STAT_CONFIG_TERM__MAX;
1068
1069#define ADD(__term, __val) \
1070 event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \
1071 event->data[i].val = __val; \
1072 i++;
1073
1074 ADD(AGGR_MODE, config->aggr_mode)
1075 ADD(INTERVAL, config->interval)
1076 ADD(SCALE, config->scale)
1077
1078 WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
1079 "stat config terms unbalanced\n");
1080#undef ADD
1081
1082 err = process(tool, (union perf_event *) event, NULL, machine);
1083
1084 free(event);
1085 return err;
1086}
1087
1088int perf_event__synthesize_stat(struct perf_tool *tool,
1089 u32 cpu, u32 thread, u64 id,
1090 struct perf_counts_values *count,
1091 perf_event__handler_t process,
1092 struct machine *machine)
1093{
1094 struct perf_record_stat event;
1095
1096 event.header.type = PERF_RECORD_STAT;
1097 event.header.size = sizeof(event);
1098 event.header.misc = 0;
1099
1100 event.id = id;
1101 event.cpu = cpu;
1102 event.thread = thread;
1103 event.val = count->val;
1104 event.ena = count->ena;
1105 event.run = count->run;
1106
1107 return process(tool, (union perf_event *) &event, NULL, machine);
1108}
1109
1110int perf_event__synthesize_stat_round(struct perf_tool *tool,
1111 u64 evtime, u64 type,
1112 perf_event__handler_t process,
1113 struct machine *machine)
1114{
1115 struct perf_record_stat_round event;
1116
1117 event.header.type = PERF_RECORD_STAT_ROUND;
1118 event.header.size = sizeof(event);
1119 event.header.misc = 0;
1120
1121 event.time = evtime;
1122 event.type = type;
1123
1124 return process(tool, (union perf_event *) &event, NULL, machine);
1125}
1126
1127size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type, u64 read_format)
1128{
1129 size_t sz, result = sizeof(struct perf_record_sample);
1130
1131 if (type & PERF_SAMPLE_IDENTIFIER)
1132 result += sizeof(u64);
1133
1134 if (type & PERF_SAMPLE_IP)
1135 result += sizeof(u64);
1136
1137 if (type & PERF_SAMPLE_TID)
1138 result += sizeof(u64);
1139
1140 if (type & PERF_SAMPLE_TIME)
1141 result += sizeof(u64);
1142
1143 if (type & PERF_SAMPLE_ADDR)
1144 result += sizeof(u64);
1145
1146 if (type & PERF_SAMPLE_ID)
1147 result += sizeof(u64);
1148
1149 if (type & PERF_SAMPLE_STREAM_ID)
1150 result += sizeof(u64);
1151
1152 if (type & PERF_SAMPLE_CPU)
1153 result += sizeof(u64);
1154
1155 if (type & PERF_SAMPLE_PERIOD)
1156 result += sizeof(u64);
1157
1158 if (type & PERF_SAMPLE_READ) {
1159 result += sizeof(u64);
1160 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1161 result += sizeof(u64);
1162 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1163 result += sizeof(u64);
1164 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1165 if (read_format & PERF_FORMAT_GROUP) {
1166 sz = sample->read.group.nr *
1167 sizeof(struct sample_read_value);
1168 result += sz;
1169 } else {
1170 result += sizeof(u64);
1171 }
1172 }
1173
1174 if (type & PERF_SAMPLE_CALLCHAIN) {
1175 sz = (sample->callchain->nr + 1) * sizeof(u64);
1176 result += sz;
1177 }
1178
1179 if (type & PERF_SAMPLE_RAW) {
1180 result += sizeof(u32);
1181 result += sample->raw_size;
1182 }
1183
1184 if (type & PERF_SAMPLE_BRANCH_STACK) {
1185 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
1186 sz += sizeof(u64);
1187 result += sz;
1188 }
1189
1190 if (type & PERF_SAMPLE_REGS_USER) {
1191 if (sample->user_regs.abi) {
1192 result += sizeof(u64);
1193 sz = hweight64(sample->user_regs.mask) * sizeof(u64);
1194 result += sz;
1195 } else {
1196 result += sizeof(u64);
1197 }
1198 }
1199
1200 if (type & PERF_SAMPLE_STACK_USER) {
1201 sz = sample->user_stack.size;
1202 result += sizeof(u64);
1203 if (sz) {
1204 result += sz;
1205 result += sizeof(u64);
1206 }
1207 }
1208
1209 if (type & PERF_SAMPLE_WEIGHT)
1210 result += sizeof(u64);
1211
1212 if (type & PERF_SAMPLE_DATA_SRC)
1213 result += sizeof(u64);
1214
1215 if (type & PERF_SAMPLE_TRANSACTION)
1216 result += sizeof(u64);
1217
1218 if (type & PERF_SAMPLE_REGS_INTR) {
1219 if (sample->intr_regs.abi) {
1220 result += sizeof(u64);
1221 sz = hweight64(sample->intr_regs.mask) * sizeof(u64);
1222 result += sz;
1223 } else {
1224 result += sizeof(u64);
1225 }
1226 }
1227
1228 if (type & PERF_SAMPLE_PHYS_ADDR)
1229 result += sizeof(u64);
1230
1231 return result;
1232}
1233
1234int perf_event__synthesize_sample(union perf_event *event, u64 type, u64 read_format,
1235 const struct perf_sample *sample)
1236{
1237 __u64 *array;
1238 size_t sz;
1239 /*
1240 * used for cross-endian analysis. See git commit 65014ab3
1241 * for why this goofiness is needed.
1242 */
1243 union u64_swap u;
1244
1245 array = event->sample.array;
1246
1247 if (type & PERF_SAMPLE_IDENTIFIER) {
1248 *array = sample->id;
1249 array++;
1250 }
1251
1252 if (type & PERF_SAMPLE_IP) {
1253 *array = sample->ip;
1254 array++;
1255 }
1256
1257 if (type & PERF_SAMPLE_TID) {
1258 u.val32[0] = sample->pid;
1259 u.val32[1] = sample->tid;
1260 *array = u.val64;
1261 array++;
1262 }
1263
1264 if (type & PERF_SAMPLE_TIME) {
1265 *array = sample->time;
1266 array++;
1267 }
1268
1269 if (type & PERF_SAMPLE_ADDR) {
1270 *array = sample->addr;
1271 array++;
1272 }
1273
1274 if (type & PERF_SAMPLE_ID) {
1275 *array = sample->id;
1276 array++;
1277 }
1278
1279 if (type & PERF_SAMPLE_STREAM_ID) {
1280 *array = sample->stream_id;
1281 array++;
1282 }
1283
1284 if (type & PERF_SAMPLE_CPU) {
1285 u.val32[0] = sample->cpu;
1286 u.val32[1] = 0;
1287 *array = u.val64;
1288 array++;
1289 }
1290
1291 if (type & PERF_SAMPLE_PERIOD) {
1292 *array = sample->period;
1293 array++;
1294 }
1295
1296 if (type & PERF_SAMPLE_READ) {
1297 if (read_format & PERF_FORMAT_GROUP)
1298 *array = sample->read.group.nr;
1299 else
1300 *array = sample->read.one.value;
1301 array++;
1302
1303 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
1304 *array = sample->read.time_enabled;
1305 array++;
1306 }
1307
1308 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
1309 *array = sample->read.time_running;
1310 array++;
1311 }
1312
1313 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1314 if (read_format & PERF_FORMAT_GROUP) {
1315 sz = sample->read.group.nr *
1316 sizeof(struct sample_read_value);
1317 memcpy(array, sample->read.group.values, sz);
1318 array = (void *)array + sz;
1319 } else {
1320 *array = sample->read.one.id;
1321 array++;
1322 }
1323 }
1324
1325 if (type & PERF_SAMPLE_CALLCHAIN) {
1326 sz = (sample->callchain->nr + 1) * sizeof(u64);
1327 memcpy(array, sample->callchain, sz);
1328 array = (void *)array + sz;
1329 }
1330
1331 if (type & PERF_SAMPLE_RAW) {
1332 u.val32[0] = sample->raw_size;
1333 *array = u.val64;
1334 array = (void *)array + sizeof(u32);
1335
1336 memcpy(array, sample->raw_data, sample->raw_size);
1337 array = (void *)array + sample->raw_size;
1338 }
1339
1340 if (type & PERF_SAMPLE_BRANCH_STACK) {
1341 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
1342 sz += sizeof(u64);
1343 memcpy(array, sample->branch_stack, sz);
1344 array = (void *)array + sz;
1345 }
1346
1347 if (type & PERF_SAMPLE_REGS_USER) {
1348 if (sample->user_regs.abi) {
1349 *array++ = sample->user_regs.abi;
1350 sz = hweight64(sample->user_regs.mask) * sizeof(u64);
1351 memcpy(array, sample->user_regs.regs, sz);
1352 array = (void *)array + sz;
1353 } else {
1354 *array++ = 0;
1355 }
1356 }
1357
1358 if (type & PERF_SAMPLE_STACK_USER) {
1359 sz = sample->user_stack.size;
1360 *array++ = sz;
1361 if (sz) {
1362 memcpy(array, sample->user_stack.data, sz);
1363 array = (void *)array + sz;
1364 *array++ = sz;
1365 }
1366 }
1367
1368 if (type & PERF_SAMPLE_WEIGHT) {
1369 *array = sample->weight;
1370 array++;
1371 }
1372
1373 if (type & PERF_SAMPLE_DATA_SRC) {
1374 *array = sample->data_src;
1375 array++;
1376 }
1377
1378 if (type & PERF_SAMPLE_TRANSACTION) {
1379 *array = sample->transaction;
1380 array++;
1381 }
1382
1383 if (type & PERF_SAMPLE_REGS_INTR) {
1384 if (sample->intr_regs.abi) {
1385 *array++ = sample->intr_regs.abi;
1386 sz = hweight64(sample->intr_regs.mask) * sizeof(u64);
1387 memcpy(array, sample->intr_regs.regs, sz);
1388 array = (void *)array + sz;
1389 } else {
1390 *array++ = 0;
1391 }
1392 }
1393
1394 if (type & PERF_SAMPLE_PHYS_ADDR) {
1395 *array = sample->phys_addr;
1396 array++;
1397 }
1398
1399 return 0;
1400}
1401
1402int perf_event__synthesize_id_index(struct perf_tool *tool, perf_event__handler_t process,
1403 struct evlist *evlist, struct machine *machine)
1404{
1405 union perf_event *ev;
1406 struct evsel *evsel;
1407 size_t nr = 0, i = 0, sz, max_nr, n;
1408 int err;
1409
1410 pr_debug2("Synthesizing id index\n");
1411
1412 max_nr = (UINT16_MAX - sizeof(struct perf_record_id_index)) /
1413 sizeof(struct id_index_entry);
1414
1415 evlist__for_each_entry(evlist, evsel)
1416 nr += evsel->core.ids;
1417
1418 n = nr > max_nr ? max_nr : nr;
1419 sz = sizeof(struct perf_record_id_index) + n * sizeof(struct id_index_entry);
1420 ev = zalloc(sz);
1421 if (!ev)
1422 return -ENOMEM;
1423
1424 ev->id_index.header.type = PERF_RECORD_ID_INDEX;
1425 ev->id_index.header.size = sz;
1426 ev->id_index.nr = n;
1427
1428 evlist__for_each_entry(evlist, evsel) {
1429 u32 j;
1430
1431 for (j = 0; j < evsel->core.ids; j++) {
1432 struct id_index_entry *e;
1433 struct perf_sample_id *sid;
1434
1435 if (i >= n) {
1436 err = process(tool, ev, NULL, machine);
1437 if (err)
1438 goto out_err;
1439 nr -= n;
1440 i = 0;
1441 }
1442
1443 e = &ev->id_index.entries[i++];
1444
1445 e->id = evsel->core.id[j];
1446
1447 sid = perf_evlist__id2sid(evlist, e->id);
1448 if (!sid) {
1449 free(ev);
1450 return -ENOENT;
1451 }
1452
1453 e->idx = sid->idx;
1454 e->cpu = sid->cpu;
1455 e->tid = sid->tid;
1456 }
1457 }
1458
1459 sz = sizeof(struct perf_record_id_index) + nr * sizeof(struct id_index_entry);
1460 ev->id_index.header.size = sz;
1461 ev->id_index.nr = nr;
1462
1463 err = process(tool, ev, NULL, machine);
1464out_err:
1465 free(ev);
1466
1467 return err;
1468}
1469
1470int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
1471 struct target *target, struct perf_thread_map *threads,
1472 perf_event__handler_t process, bool data_mmap,
1473 unsigned int nr_threads_synthesize)
1474{
1475 if (target__has_task(target))
1476 return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap);
1477 else if (target__has_cpu(target))
1478 return perf_event__synthesize_threads(tool, process,
1479 machine, data_mmap,
1480 nr_threads_synthesize);
1481 /* command specified */
1482 return 0;
1483}
1484
1485int machine__synthesize_threads(struct machine *machine, struct target *target,
1486 struct perf_thread_map *threads, bool data_mmap,
1487 unsigned int nr_threads_synthesize)
1488{
1489 return __machine__synthesize_threads(machine, NULL, target, threads,
1490 perf_event__process, data_mmap,
1491 nr_threads_synthesize);
1492}
1493
1494static struct perf_record_event_update *event_update_event__new(size_t size, u64 type, u64 id)
1495{
1496 struct perf_record_event_update *ev;
1497
1498 size += sizeof(*ev);
1499 size = PERF_ALIGN(size, sizeof(u64));
1500
1501 ev = zalloc(size);
1502 if (ev) {
1503 ev->header.type = PERF_RECORD_EVENT_UPDATE;
1504 ev->header.size = (u16)size;
1505 ev->type = type;
1506 ev->id = id;
1507 }
1508 return ev;
1509}
1510
1511int perf_event__synthesize_event_update_unit(struct perf_tool *tool, struct evsel *evsel,
1512 perf_event__handler_t process)
1513{
1514 size_t size = strlen(evsel->unit);
1515 struct perf_record_event_update *ev;
1516 int err;
1517
1518 ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->core.id[0]);
1519 if (ev == NULL)
1520 return -ENOMEM;
1521
1522 strlcpy(ev->data, evsel->unit, size + 1);
1523 err = process(tool, (union perf_event *)ev, NULL, NULL);
1524 free(ev);
1525 return err;
1526}
1527
1528int perf_event__synthesize_event_update_scale(struct perf_tool *tool, struct evsel *evsel,
1529 perf_event__handler_t process)
1530{
1531 struct perf_record_event_update *ev;
1532 struct perf_record_event_update_scale *ev_data;
1533 int err;
1534
1535 ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->core.id[0]);
1536 if (ev == NULL)
1537 return -ENOMEM;
1538
1539 ev_data = (struct perf_record_event_update_scale *)ev->data;
1540 ev_data->scale = evsel->scale;
1541 err = process(tool, (union perf_event *)ev, NULL, NULL);
1542 free(ev);
1543 return err;
1544}
1545
1546int perf_event__synthesize_event_update_name(struct perf_tool *tool, struct evsel *evsel,
1547 perf_event__handler_t process)
1548{
1549 struct perf_record_event_update *ev;
1550 size_t len = strlen(evsel->name);
1551 int err;
1552
1553 ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->core.id[0]);
1554 if (ev == NULL)
1555 return -ENOMEM;
1556
1557 strlcpy(ev->data, evsel->name, len + 1);
1558 err = process(tool, (union perf_event *)ev, NULL, NULL);
1559 free(ev);
1560 return err;
1561}
1562
1563int perf_event__synthesize_event_update_cpus(struct perf_tool *tool, struct evsel *evsel,
1564 perf_event__handler_t process)
1565{
1566 size_t size = sizeof(struct perf_record_event_update);
1567 struct perf_record_event_update *ev;
1568 int max, err;
1569 u16 type;
1570
1571 if (!evsel->core.own_cpus)
1572 return 0;
1573
1574 ev = cpu_map_data__alloc(evsel->core.own_cpus, &size, &type, &max);
1575 if (!ev)
1576 return -ENOMEM;
1577
1578 ev->header.type = PERF_RECORD_EVENT_UPDATE;
1579 ev->header.size = (u16)size;
1580 ev->type = PERF_EVENT_UPDATE__CPUS;
1581 ev->id = evsel->core.id[0];
1582
1583 cpu_map_data__synthesize((struct perf_record_cpu_map_data *)ev->data,
1584 evsel->core.own_cpus, type, max);
1585
1586 err = process(tool, (union perf_event *)ev, NULL, NULL);
1587 free(ev);
1588 return err;
1589}
1590
1591int perf_event__synthesize_attrs(struct perf_tool *tool, struct evlist *evlist,
1592 perf_event__handler_t process)
1593{
1594 struct evsel *evsel;
1595 int err = 0;
1596
1597 evlist__for_each_entry(evlist, evsel) {
1598 err = perf_event__synthesize_attr(tool, &evsel->core.attr, evsel->core.ids,
1599 evsel->core.id, process);
1600 if (err) {
1601 pr_debug("failed to create perf header attribute\n");
1602 return err;
1603 }
1604 }
1605
1606 return err;
1607}
1608
1609static bool has_unit(struct evsel *evsel)
1610{
1611 return evsel->unit && *evsel->unit;
1612}
1613
1614static bool has_scale(struct evsel *evsel)
1615{
1616 return evsel->scale != 1;
1617}
1618
1619int perf_event__synthesize_extra_attr(struct perf_tool *tool, struct evlist *evsel_list,
1620 perf_event__handler_t process, bool is_pipe)
1621{
1622 struct evsel *evsel;
1623 int err;
1624
1625 /*
1626 * Synthesize other events stuff not carried within
1627 * attr event - unit, scale, name
1628 */
1629 evlist__for_each_entry(evsel_list, evsel) {
1630 if (!evsel->supported)
1631 continue;
1632
1633 /*
1634 * Synthesize unit and scale only if it's defined.
1635 */
1636 if (has_unit(evsel)) {
1637 err = perf_event__synthesize_event_update_unit(tool, evsel, process);
1638 if (err < 0) {
1639 pr_err("Couldn't synthesize evsel unit.\n");
1640 return err;
1641 }
1642 }
1643
1644 if (has_scale(evsel)) {
1645 err = perf_event__synthesize_event_update_scale(tool, evsel, process);
1646 if (err < 0) {
1647 pr_err("Couldn't synthesize evsel evsel.\n");
1648 return err;
1649 }
1650 }
1651
1652 if (evsel->core.own_cpus) {
1653 err = perf_event__synthesize_event_update_cpus(tool, evsel, process);
1654 if (err < 0) {
1655 pr_err("Couldn't synthesize evsel cpus.\n");
1656 return err;
1657 }
1658 }
1659
1660 /*
1661 * Name is needed only for pipe output,
1662 * perf.data carries event names.
1663 */
1664 if (is_pipe) {
1665 err = perf_event__synthesize_event_update_name(tool, evsel, process);
1666 if (err < 0) {
1667 pr_err("Couldn't synthesize evsel name.\n");
1668 return err;
1669 }
1670 }
1671 }
1672 return 0;
1673}
1674
1675int perf_event__synthesize_attr(struct perf_tool *tool, struct perf_event_attr *attr,
1676 u32 ids, u64 *id, perf_event__handler_t process)
1677{
1678 union perf_event *ev;
1679 size_t size;
1680 int err;
1681
1682 size = sizeof(struct perf_event_attr);
1683 size = PERF_ALIGN(size, sizeof(u64));
1684 size += sizeof(struct perf_event_header);
1685 size += ids * sizeof(u64);
1686
1687 ev = zalloc(size);
1688
1689 if (ev == NULL)
1690 return -ENOMEM;
1691
1692 ev->attr.attr = *attr;
1693 memcpy(ev->attr.id, id, ids * sizeof(u64));
1694
1695 ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
1696 ev->attr.header.size = (u16)size;
1697
1698 if (ev->attr.header.size == size)
1699 err = process(tool, ev, NULL, NULL);
1700 else
1701 err = -E2BIG;
1702
1703 free(ev);
1704
1705 return err;
1706}
1707
1708int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd, struct evlist *evlist,
1709 perf_event__handler_t process)
1710{
1711 union perf_event ev;
1712 struct tracing_data *tdata;
1713 ssize_t size = 0, aligned_size = 0, padding;
1714 struct feat_fd ff;
1715
1716 /*
1717 * We are going to store the size of the data followed
1718 * by the data contents. Since the fd descriptor is a pipe,
1719 * we cannot seek back to store the size of the data once
1720 * we know it. Instead we:
1721 *
1722 * - write the tracing data to the temp file
1723 * - get/write the data size to pipe
1724 * - write the tracing data from the temp file
1725 * to the pipe
1726 */
1727 tdata = tracing_data_get(&evlist->core.entries, fd, true);
1728 if (!tdata)
1729 return -1;
1730
1731 memset(&ev, 0, sizeof(ev));
1732
1733 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
1734 size = tdata->size;
1735 aligned_size = PERF_ALIGN(size, sizeof(u64));
1736 padding = aligned_size - size;
1737 ev.tracing_data.header.size = sizeof(ev.tracing_data);
1738 ev.tracing_data.size = aligned_size;
1739
1740 process(tool, &ev, NULL, NULL);
1741
1742 /*
1743 * The put function will copy all the tracing data
1744 * stored in temp file to the pipe.
1745 */
1746 tracing_data_put(tdata);
1747
1748 ff = (struct feat_fd){ .fd = fd };
1749 if (write_padded(&ff, NULL, 0, padding))
1750 return -1;
1751
1752 return aligned_size;
1753}
1754
1755int perf_event__synthesize_build_id(struct perf_tool *tool, struct dso *pos, u16 misc,
1756 perf_event__handler_t process, struct machine *machine)
1757{
1758 union perf_event ev;
1759 size_t len;
1760
1761 if (!pos->hit)
1762 return 0;
1763
1764 memset(&ev, 0, sizeof(ev));
1765
1766 len = pos->long_name_len + 1;
1767 len = PERF_ALIGN(len, NAME_ALIGN);
1768 memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
1769 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
1770 ev.build_id.header.misc = misc;
1771 ev.build_id.pid = machine->pid;
1772 ev.build_id.header.size = sizeof(ev.build_id) + len;
1773 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
1774
1775 return process(tool, &ev, NULL, machine);
1776}
1777
1778int perf_event__synthesize_stat_events(struct perf_stat_config *config, struct perf_tool *tool,
1779 struct evlist *evlist, perf_event__handler_t process, bool attrs)
1780{
1781 int err;
1782
1783 if (attrs) {
1784 err = perf_event__synthesize_attrs(tool, evlist, process);
1785 if (err < 0) {
1786 pr_err("Couldn't synthesize attrs.\n");
1787 return err;
1788 }
1789 }
1790
1791 err = perf_event__synthesize_extra_attr(tool, evlist, process, attrs);
1792 err = perf_event__synthesize_thread_map2(tool, evlist->core.threads, process, NULL);
1793 if (err < 0) {
1794 pr_err("Couldn't synthesize thread map.\n");
1795 return err;
1796 }
1797
1798 err = perf_event__synthesize_cpu_map(tool, evlist->core.cpus, process, NULL);
1799 if (err < 0) {
1800 pr_err("Couldn't synthesize thread map.\n");
1801 return err;
1802 }
1803
1804 err = perf_event__synthesize_stat_config(tool, config, process, NULL);
1805 if (err < 0) {
1806 pr_err("Couldn't synthesize config.\n");
1807 return err;
1808 }
1809
1810 return 0;
1811}
1812
1813int __weak perf_event__synth_time_conv(const struct perf_event_mmap_page *pc __maybe_unused,
1814 struct perf_tool *tool __maybe_unused,
1815 perf_event__handler_t process __maybe_unused,
1816 struct machine *machine __maybe_unused)
1817{
1818 return 0;
1819}
1820
1821extern const struct perf_header_feature_ops feat_ops[HEADER_LAST_FEATURE];
1822
1823int perf_event__synthesize_features(struct perf_tool *tool, struct perf_session *session,
1824 struct evlist *evlist, perf_event__handler_t process)
1825{
1826 struct perf_header *header = &session->header;
1827 struct perf_record_header_feature *fe;
1828 struct feat_fd ff;
1829 size_t sz, sz_hdr;
1830 int feat, ret;
1831
1832 sz_hdr = sizeof(fe->header);
1833 sz = sizeof(union perf_event);
1834 /* get a nice alignment */
1835 sz = PERF_ALIGN(sz, page_size);
1836
1837 memset(&ff, 0, sizeof(ff));
1838
1839 ff.buf = malloc(sz);
1840 if (!ff.buf)
1841 return -ENOMEM;
1842
1843 ff.size = sz - sz_hdr;
1844 ff.ph = &session->header;
1845
1846 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
1847 if (!feat_ops[feat].synthesize) {
1848 pr_debug("No record header feature for header :%d\n", feat);
1849 continue;
1850 }
1851
1852 ff.offset = sizeof(*fe);
1853
1854 ret = feat_ops[feat].write(&ff, evlist);
1855 if (ret || ff.offset <= (ssize_t)sizeof(*fe)) {
1856 pr_debug("Error writing feature\n");
1857 continue;
1858 }
1859 /* ff.buf may have changed due to realloc in do_write() */
1860 fe = ff.buf;
1861 memset(fe, 0, sizeof(*fe));
1862
1863 fe->feat_id = feat;
1864 fe->header.type = PERF_RECORD_HEADER_FEATURE;
1865 fe->header.size = ff.offset;
1866
1867 ret = process(tool, ff.buf, NULL, NULL);
1868 if (ret) {
1869 free(ff.buf);
1870 return ret;
1871 }
1872 }
1873
1874 /* Send HEADER_LAST_FEATURE mark. */
1875 fe = ff.buf;
1876 fe->feat_id = HEADER_LAST_FEATURE;
1877 fe->header.type = PERF_RECORD_HEADER_FEATURE;
1878 fe->header.size = sizeof(*fe);
1879
1880 ret = process(tool, ff.buf, NULL, NULL);
1881
1882 free(ff.buf);
1883 return ret;
1884}