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Merge tag 'block-5.9-2020-08-14' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / tools / perf / util / synthetic-events.c
blob89b390623b63d610e1d3730e236edd38090f8f01
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 "util/cgroup.h"
20 #include <linux/bitops.h>
21 #include <linux/kernel.h>
22 #include <linux/string.h>
23 #include <linux/zalloc.h>
24 #include <linux/perf_event.h>
25 #include <asm/bug.h>
26 #include <perf/evsel.h>
27 #include <internal/cpumap.h>
28 #include <perf/cpumap.h>
29 #include <internal/lib.h> // page_size
30 #include <internal/threadmap.h>
31 #include <perf/threadmap.h>
32 #include <symbol/kallsyms.h>
33 #include <dirent.h>
34 #include <errno.h>
35 #include <inttypes.h>
36 #include <stdio.h>
37 #include <string.h>
38 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
39 #include <api/fs/fs.h>
40 #include <api/io.h>
41 #include <sys/types.h>
42 #include <sys/stat.h>
43 #include <fcntl.h>
44 #include <unistd.h>
45
46 #define DEFAULT_PROC_MAP_PARSE_TIMEOUT 500
47
48 unsigned int proc_map_timeout = DEFAULT_PROC_MAP_PARSE_TIMEOUT;
49
50 int perf_tool__process_synth_event(struct perf_tool *tool,
51 union perf_event *event,
52 struct machine *machine,
53 perf_event__handler_t process)
54 {
55 struct perf_sample synth_sample = {
56 .pid = -1,
57 .tid = -1,
58 .time = -1,
59 .stream_id = -1,
60 .cpu = -1,
61 .period = 1,
62 .cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
63 };
64
65 return process(tool, event, &synth_sample, machine);
66 };
67
68 /*
69 * Assumes that the first 4095 bytes of /proc/pid/stat contains
70 * the comm, tgid and ppid.
71 */
72 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
73 pid_t *tgid, pid_t *ppid)
74 {
75 char bf[4096];
76 int fd;
77 size_t size = 0;
78 ssize_t n;
79 char *name, *tgids, *ppids;
80
81 *tgid = -1;
82 *ppid = -1;
83
84 snprintf(bf, sizeof(bf), "/proc/%d/status", pid);
85
86 fd = open(bf, O_RDONLY);
87 if (fd < 0) {
88 pr_debug("couldn't open %s\n", bf);
89 return -1;
90 }
91
92 n = read(fd, bf, sizeof(bf) - 1);
93 close(fd);
94 if (n <= 0) {
95 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
96 pid);
97 return -1;
98 }
99 bf[n] = '\0';
100
101 name = strstr(bf, "Name:");
102 tgids = strstr(bf, "Tgid:");
103 ppids = strstr(bf, "PPid:");
104
105 if (name) {
106 char *nl;
107
108 name = skip_spaces(name + 5); /* strlen("Name:") */
109 nl = strchr(name, '\n');
110 if (nl)
111 *nl = '\0';
112
113 size = strlen(name);
114 if (size >= len)
115 size = len - 1;
116 memcpy(comm, name, size);
117 comm[size] = '\0';
118 } else {
119 pr_debug("Name: string not found for pid %d\n", pid);
120 }
121
122 if (tgids) {
123 tgids += 5; /* strlen("Tgid:") */
124 *tgid = atoi(tgids);
125 } else {
126 pr_debug("Tgid: string not found for pid %d\n", pid);
127 }
128
129 if (ppids) {
130 ppids += 5; /* strlen("PPid:") */
131 *ppid = atoi(ppids);
132 } else {
133 pr_debug("PPid: string not found for pid %d\n", pid);
134 }
135
136 return 0;
137 }
138
139 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
140 struct machine *machine,
141 pid_t *tgid, pid_t *ppid)
142 {
143 size_t size;
144
145 *ppid = -1;
146
147 memset(&event->comm, 0, sizeof(event->comm));
148
149 if (machine__is_host(machine)) {
150 if (perf_event__get_comm_ids(pid, event->comm.comm,
151 sizeof(event->comm.comm),
152 tgid, ppid) != 0) {
153 return -1;
154 }
155 } else {
156 *tgid = machine->pid;
157 }
158
159 if (*tgid < 0)
160 return -1;
161
162 event->comm.pid = *tgid;
163 event->comm.header.type = PERF_RECORD_COMM;
164
165 size = strlen(event->comm.comm) + 1;
166 size = PERF_ALIGN(size, sizeof(u64));
167 memset(event->comm.comm + size, 0, machine->id_hdr_size);
168 event->comm.header.size = (sizeof(event->comm) -
169 (sizeof(event->comm.comm) - size) +
170 machine->id_hdr_size);
171 event->comm.tid = pid;
172
173 return 0;
174 }
175
176 pid_t perf_event__synthesize_comm(struct perf_tool *tool,
177 union perf_event *event, pid_t pid,
178 perf_event__handler_t process,
179 struct machine *machine)
180 {
181 pid_t tgid, ppid;
182
183 if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
184 return -1;
185
186 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
187 return -1;
188
189 return tgid;
190 }
191
192 static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
193 struct perf_ns_link_info *ns_link_info)
194 {
195 struct stat64 st;
196 char proc_ns[128];
197
198 sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
199 if (stat64(proc_ns, &st) == 0) {
200 ns_link_info->dev = st.st_dev;
201 ns_link_info->ino = st.st_ino;
202 }
203 }
204
205 int perf_event__synthesize_namespaces(struct perf_tool *tool,
206 union perf_event *event,
207 pid_t pid, pid_t tgid,
208 perf_event__handler_t process,
209 struct machine *machine)
210 {
211 u32 idx;
212 struct perf_ns_link_info *ns_link_info;
213
214 if (!tool || !tool->namespace_events)
215 return 0;
216
217 memset(&event->namespaces, 0, (sizeof(event->namespaces) +
218 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
219 machine->id_hdr_size));
220
221 event->namespaces.pid = tgid;
222 event->namespaces.tid = pid;
223
224 event->namespaces.nr_namespaces = NR_NAMESPACES;
225
226 ns_link_info = event->namespaces.link_info;
227
228 for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
229 perf_event__get_ns_link_info(pid, perf_ns__name(idx),
230 &ns_link_info[idx]);
231
232 event->namespaces.header.type = PERF_RECORD_NAMESPACES;
233
234 event->namespaces.header.size = (sizeof(event->namespaces) +
235 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
236 machine->id_hdr_size);
237
238 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
239 return -1;
240
241 return 0;
242 }
243
244 static int perf_event__synthesize_fork(struct perf_tool *tool,
245 union perf_event *event,
246 pid_t pid, pid_t tgid, pid_t ppid,
247 perf_event__handler_t process,
248 struct machine *machine)
249 {
250 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
251
252 /*
253 * for main thread set parent to ppid from status file. For other
254 * threads set parent pid to main thread. ie., assume main thread
255 * spawns all threads in a process
256 */
257 if (tgid == pid) {
258 event->fork.ppid = ppid;
259 event->fork.ptid = ppid;
260 } else {
261 event->fork.ppid = tgid;
262 event->fork.ptid = tgid;
263 }
264 event->fork.pid = tgid;
265 event->fork.tid = pid;
266 event->fork.header.type = PERF_RECORD_FORK;
267 event->fork.header.misc = PERF_RECORD_MISC_FORK_EXEC;
268
269 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
270
271 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
272 return -1;
273
274 return 0;
275 }
276
277 static bool read_proc_maps_line(struct io *io, __u64 *start, __u64 *end,
278 u32 *prot, u32 *flags, __u64 *offset,
279 u32 *maj, u32 *min,
280 __u64 *inode,
281 ssize_t pathname_size, char *pathname)
282 {
283 __u64 temp;
284 int ch;
285 char *start_pathname = pathname;
286
287 if (io__get_hex(io, start) != '-')
288 return false;
289 if (io__get_hex(io, end) != ' ')
290 return false;
291
292 /* map protection and flags bits */
293 *prot = 0;
294 ch = io__get_char(io);
295 if (ch == 'r')
296 *prot |= PROT_READ;
297 else if (ch != '-')
298 return false;
299 ch = io__get_char(io);
300 if (ch == 'w')
301 *prot |= PROT_WRITE;
302 else if (ch != '-')
303 return false;
304 ch = io__get_char(io);
305 if (ch == 'x')
306 *prot |= PROT_EXEC;
307 else if (ch != '-')
308 return false;
309 ch = io__get_char(io);
310 if (ch == 's')
311 *flags = MAP_SHARED;
312 else if (ch == 'p')
313 *flags = MAP_PRIVATE;
314 else
315 return false;
316 if (io__get_char(io) != ' ')
317 return false;
318
319 if (io__get_hex(io, offset) != ' ')
320 return false;
321
322 if (io__get_hex(io, &temp) != ':')
323 return false;
324 *maj = temp;
325 if (io__get_hex(io, &temp) != ' ')
326 return false;
327 *min = temp;
328
329 ch = io__get_dec(io, inode);
330 if (ch != ' ') {
331 *pathname = '\0';
332 return ch == '\n';
333 }
334 do {
335 ch = io__get_char(io);
336 } while (ch == ' ');
337 while (true) {
338 if (ch < 0)
339 return false;
340 if (ch == '\0' || ch == '\n' ||
341 (pathname + 1 - start_pathname) >= pathname_size) {
342 *pathname = '\0';
343 return true;
344 }
345 *pathname++ = ch;
346 ch = io__get_char(io);
347 }
348 }
349
350 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
351 union perf_event *event,
352 pid_t pid, pid_t tgid,
353 perf_event__handler_t process,
354 struct machine *machine,
355 bool mmap_data)
356 {
357 unsigned long long t;
358 char bf[BUFSIZ];
359 struct io io;
360 bool truncation = false;
361 unsigned long long timeout = proc_map_timeout * 1000000ULL;
362 int rc = 0;
363 const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
364 int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
365
366 if (machine__is_default_guest(machine))
367 return 0;
368
369 snprintf(bf, sizeof(bf), "%s/proc/%d/task/%d/maps",
370 machine->root_dir, pid, pid);
371
372 io.fd = open(bf, O_RDONLY, 0);
373 if (io.fd < 0) {
374 /*
375 * We raced with a task exiting - just return:
376 */
377 pr_debug("couldn't open %s\n", bf);
378 return -1;
379 }
380 io__init(&io, io.fd, bf, sizeof(bf));
381
382 event->header.type = PERF_RECORD_MMAP2;
383 t = rdclock();
384
385 while (!io.eof) {
386 static const char anonstr[] = "//anon";
387 size_t size;
388
389 /* ensure null termination since stack will be reused. */
390 event->mmap2.filename[0] = '\0';
391
392 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
393 if (!read_proc_maps_line(&io,
394 &event->mmap2.start,
395 &event->mmap2.len,
396 &event->mmap2.prot,
397 &event->mmap2.flags,
398 &event->mmap2.pgoff,
399 &event->mmap2.maj,
400 &event->mmap2.min,
401 &event->mmap2.ino,
402 sizeof(event->mmap2.filename),
403 event->mmap2.filename))
404 continue;
405
406 if ((rdclock() - t) > timeout) {
407 pr_warning("Reading %s/proc/%d/task/%d/maps time out. "
408 "You may want to increase "
409 "the time limit by --proc-map-timeout\n",
410 machine->root_dir, pid, pid);
411 truncation = true;
412 goto out;
413 }
414
415 event->mmap2.ino_generation = 0;
416
417 /*
418 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
419 */
420 if (machine__is_host(machine))
421 event->header.misc = PERF_RECORD_MISC_USER;
422 else
423 event->header.misc = PERF_RECORD_MISC_GUEST_USER;
424
425 if ((event->mmap2.prot & PROT_EXEC) == 0) {
426 if (!mmap_data || (event->mmap2.prot & PROT_READ) == 0)
427 continue;
428
429 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
430 }
431
432 out:
433 if (truncation)
434 event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
435
436 if (!strcmp(event->mmap2.filename, ""))
437 strcpy(event->mmap2.filename, anonstr);
438
439 if (hugetlbfs_mnt_len &&
440 !strncmp(event->mmap2.filename, hugetlbfs_mnt,
441 hugetlbfs_mnt_len)) {
442 strcpy(event->mmap2.filename, anonstr);
443 event->mmap2.flags |= MAP_HUGETLB;
444 }
445
446 size = strlen(event->mmap2.filename) + 1;
447 size = PERF_ALIGN(size, sizeof(u64));
448 event->mmap2.len -= event->mmap.start;
449 event->mmap2.header.size = (sizeof(event->mmap2) -
450 (sizeof(event->mmap2.filename) - size));
451 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
452 event->mmap2.header.size += machine->id_hdr_size;
453 event->mmap2.pid = tgid;
454 event->mmap2.tid = pid;
455
456 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
457 rc = -1;
458 break;
459 }
460
461 if (truncation)
462 break;
463 }
464
465 close(io.fd);
466 return rc;
467 }
468
469 #ifdef HAVE_FILE_HANDLE
470 static int perf_event__synthesize_cgroup(struct perf_tool *tool,
471 union perf_event *event,
472 char *path, size_t mount_len,
473 perf_event__handler_t process,
474 struct machine *machine)
475 {
476 size_t event_size = sizeof(event->cgroup) - sizeof(event->cgroup.path);
477 size_t path_len = strlen(path) - mount_len + 1;
478 struct {
479 struct file_handle fh;
480 uint64_t cgroup_id;
481 } handle;
482 int mount_id;
483
484 while (path_len % sizeof(u64))
485 path[mount_len + path_len++] = '\0';
486
487 memset(&event->cgroup, 0, event_size);
488
489 event->cgroup.header.type = PERF_RECORD_CGROUP;
490 event->cgroup.header.size = event_size + path_len + machine->id_hdr_size;
491
492 handle.fh.handle_bytes = sizeof(handle.cgroup_id);
493 if (name_to_handle_at(AT_FDCWD, path, &handle.fh, &mount_id, 0) < 0) {
494 pr_debug("stat failed: %s\n", path);
495 return -1;
496 }
497
498 event->cgroup.id = handle.cgroup_id;
499 strncpy(event->cgroup.path, path + mount_len, path_len);
500 memset(event->cgroup.path + path_len, 0, machine->id_hdr_size);
501
502 if (perf_tool__process_synth_event(tool, event, machine, process) < 0) {
503 pr_debug("process synth event failed\n");
504 return -1;
505 }
506
507 return 0;
508 }
509
510 static int perf_event__walk_cgroup_tree(struct perf_tool *tool,
511 union perf_event *event,
512 char *path, size_t mount_len,
513 perf_event__handler_t process,
514 struct machine *machine)
515 {
516 size_t pos = strlen(path);
517 DIR *d;
518 struct dirent *dent;
519 int ret = 0;
520
521 if (perf_event__synthesize_cgroup(tool, event, path, mount_len,
522 process, machine) < 0)
523 return -1;
524
525 d = opendir(path);
526 if (d == NULL) {
527 pr_debug("failed to open directory: %s\n", path);
528 return -1;
529 }
530
531 while ((dent = readdir(d)) != NULL) {
532 if (dent->d_type != DT_DIR)
533 continue;
534 if (!strcmp(dent->d_name, ".") ||
535 !strcmp(dent->d_name, ".."))
536 continue;
537
538 /* any sane path should be less than PATH_MAX */
539 if (strlen(path) + strlen(dent->d_name) + 1 >= PATH_MAX)
540 continue;
541
542 if (path[pos - 1] != '/')
543 strcat(path, "/");
544 strcat(path, dent->d_name);
545
546 ret = perf_event__walk_cgroup_tree(tool, event, path,
547 mount_len, process, machine);
548 if (ret < 0)
549 break;
550
551 path[pos] = '\0';
552 }
553
554 closedir(d);
555 return ret;
556 }
557
558 int perf_event__synthesize_cgroups(struct perf_tool *tool,
559 perf_event__handler_t process,
560 struct machine *machine)
561 {
562 union perf_event event;
563 char cgrp_root[PATH_MAX];
564 size_t mount_len; /* length of mount point in the path */
565
566 if (cgroupfs_find_mountpoint(cgrp_root, PATH_MAX, "perf_event") < 0) {
567 pr_debug("cannot find cgroup mount point\n");
568 return -1;
569 }
570
571 mount_len = strlen(cgrp_root);
572 /* make sure the path starts with a slash (after mount point) */
573 strcat(cgrp_root, "/");
574
575 if (perf_event__walk_cgroup_tree(tool, &event, cgrp_root, mount_len,
576 process, machine) < 0)
577 return -1;
578
579 return 0;
580 }
581 #else
582 int perf_event__synthesize_cgroups(struct perf_tool *tool __maybe_unused,
583 perf_event__handler_t process __maybe_unused,
584 struct machine *machine __maybe_unused)
585 {
586 return -1;
587 }
588 #endif
589
590 int perf_event__synthesize_modules(struct perf_tool *tool, perf_event__handler_t process,
591 struct machine *machine)
592 {
593 int rc = 0;
594 struct map *pos;
595 struct maps *maps = machine__kernel_maps(machine);
596 union perf_event *event = zalloc((sizeof(event->mmap) +
597 machine->id_hdr_size));
598 if (event == NULL) {
599 pr_debug("Not enough memory synthesizing mmap event "
600 "for kernel modules\n");
601 return -1;
602 }
603
604 event->header.type = PERF_RECORD_MMAP;
605
606 /*
607 * kernel uses 0 for user space maps, see kernel/perf_event.c
608 * __perf_event_mmap
609 */
610 if (machine__is_host(machine))
611 event->header.misc = PERF_RECORD_MISC_KERNEL;
612 else
613 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
614
615 maps__for_each_entry(maps, pos) {
616 size_t size;
617
618 if (!__map__is_kmodule(pos))
619 continue;
620
621 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
622 event->mmap.header.type = PERF_RECORD_MMAP;
623 event->mmap.header.size = (sizeof(event->mmap) -
624 (sizeof(event->mmap.filename) - size));
625 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
626 event->mmap.header.size += machine->id_hdr_size;
627 event->mmap.start = pos->start;
628 event->mmap.len = pos->end - pos->start;
629 event->mmap.pid = machine->pid;
630
631 memcpy(event->mmap.filename, pos->dso->long_name,
632 pos->dso->long_name_len + 1);
633 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
634 rc = -1;
635 break;
636 }
637 }
638
639 free(event);
640 return rc;
641 }
642
643 static int __event__synthesize_thread(union perf_event *comm_event,
644 union perf_event *mmap_event,
645 union perf_event *fork_event,
646 union perf_event *namespaces_event,
647 pid_t pid, int full, perf_event__handler_t process,
648 struct perf_tool *tool, struct machine *machine, bool mmap_data)
649 {
650 char filename[PATH_MAX];
651 DIR *tasks;
652 struct dirent *dirent;
653 pid_t tgid, ppid;
654 int rc = 0;
655
656 /* special case: only send one comm event using passed in pid */
657 if (!full) {
658 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
659 process, machine);
660
661 if (tgid == -1)
662 return -1;
663
664 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
665 tgid, process, machine) < 0)
666 return -1;
667
668 /*
669 * send mmap only for thread group leader
670 * see thread__init_maps()
671 */
672 if (pid == tgid &&
673 perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
674 process, machine, mmap_data))
675 return -1;
676
677 return 0;
678 }
679
680 if (machine__is_default_guest(machine))
681 return 0;
682
683 snprintf(filename, sizeof(filename), "%s/proc/%d/task",
684 machine->root_dir, pid);
685
686 tasks = opendir(filename);
687 if (tasks == NULL) {
688 pr_debug("couldn't open %s\n", filename);
689 return 0;
690 }
691
692 while ((dirent = readdir(tasks)) != NULL) {
693 char *end;
694 pid_t _pid;
695
696 _pid = strtol(dirent->d_name, &end, 10);
697 if (*end)
698 continue;
699
700 rc = -1;
701 if (perf_event__prepare_comm(comm_event, _pid, machine,
702 &tgid, &ppid) != 0)
703 break;
704
705 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
706 ppid, process, machine) < 0)
707 break;
708
709 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
710 tgid, process, machine) < 0)
711 break;
712
713 /*
714 * Send the prepared comm event
715 */
716 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
717 break;
718
719 rc = 0;
720 if (_pid == pid) {
721 /* process the parent's maps too */
722 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
723 process, machine, mmap_data);
724 if (rc)
725 break;
726 }
727 }
728
729 closedir(tasks);
730 return rc;
731 }
732
733 int perf_event__synthesize_thread_map(struct perf_tool *tool,
734 struct perf_thread_map *threads,
735 perf_event__handler_t process,
736 struct machine *machine,
737 bool mmap_data)
738 {
739 union perf_event *comm_event, *mmap_event, *fork_event;
740 union perf_event *namespaces_event;
741 int err = -1, thread, j;
742
743 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
744 if (comm_event == NULL)
745 goto out;
746
747 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
748 if (mmap_event == NULL)
749 goto out_free_comm;
750
751 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
752 if (fork_event == NULL)
753 goto out_free_mmap;
754
755 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
756 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
757 machine->id_hdr_size);
758 if (namespaces_event == NULL)
759 goto out_free_fork;
760
761 err = 0;
762 for (thread = 0; thread < threads->nr; ++thread) {
763 if (__event__synthesize_thread(comm_event, mmap_event,
764 fork_event, namespaces_event,
765 perf_thread_map__pid(threads, thread), 0,
766 process, tool, machine,
767 mmap_data)) {
768 err = -1;
769 break;
770 }
771
772 /*
773 * comm.pid is set to thread group id by
774 * perf_event__synthesize_comm
775 */
776 if ((int) comm_event->comm.pid != perf_thread_map__pid(threads, thread)) {
777 bool need_leader = true;
778
779 /* is thread group leader in thread_map? */
780 for (j = 0; j < threads->nr; ++j) {
781 if ((int) comm_event->comm.pid == perf_thread_map__pid(threads, j)) {
782 need_leader = false;
783 break;
784 }
785 }
786
787 /* if not, generate events for it */
788 if (need_leader &&
789 __event__synthesize_thread(comm_event, mmap_event,
790 fork_event, namespaces_event,
791 comm_event->comm.pid, 0,
792 process, tool, machine,
793 mmap_data)) {
794 err = -1;
795 break;
796 }
797 }
798 }
799 free(namespaces_event);
800 out_free_fork:
801 free(fork_event);
802 out_free_mmap:
803 free(mmap_event);
804 out_free_comm:
805 free(comm_event);
806 out:
807 return err;
808 }
809
810 static int __perf_event__synthesize_threads(struct perf_tool *tool,
811 perf_event__handler_t process,
812 struct machine *machine,
813 bool mmap_data,
814 struct dirent **dirent,
815 int start,
816 int num)
817 {
818 union perf_event *comm_event, *mmap_event, *fork_event;
819 union perf_event *namespaces_event;
820 int err = -1;
821 char *end;
822 pid_t pid;
823 int i;
824
825 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
826 if (comm_event == NULL)
827 goto out;
828
829 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
830 if (mmap_event == NULL)
831 goto out_free_comm;
832
833 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
834 if (fork_event == NULL)
835 goto out_free_mmap;
836
837 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
838 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
839 machine->id_hdr_size);
840 if (namespaces_event == NULL)
841 goto out_free_fork;
842
843 for (i = start; i < start + num; i++) {
844 if (!isdigit(dirent[i]->d_name[0]))
845 continue;
846
847 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
848 /* only interested in proper numerical dirents */
849 if (*end)
850 continue;
851 /*
852 * We may race with exiting thread, so don't stop just because
853 * one thread couldn't be synthesized.
854 */
855 __event__synthesize_thread(comm_event, mmap_event, fork_event,
856 namespaces_event, pid, 1, process,
857 tool, machine, mmap_data);
858 }
859 err = 0;
860
861 free(namespaces_event);
862 out_free_fork:
863 free(fork_event);
864 out_free_mmap:
865 free(mmap_event);
866 out_free_comm:
867 free(comm_event);
868 out:
869 return err;
870 }
871
872 struct synthesize_threads_arg {
873 struct perf_tool *tool;
874 perf_event__handler_t process;
875 struct machine *machine;
876 bool mmap_data;
877 struct dirent **dirent;
878 int num;
879 int start;
880 };
881
882 static void *synthesize_threads_worker(void *arg)
883 {
884 struct synthesize_threads_arg *args = arg;
885
886 __perf_event__synthesize_threads(args->tool, args->process,
887 args->machine, args->mmap_data,
888 args->dirent,
889 args->start, args->num);
890 return NULL;
891 }
892
893 int perf_event__synthesize_threads(struct perf_tool *tool,
894 perf_event__handler_t process,
895 struct machine *machine,
896 bool mmap_data,
897 unsigned int nr_threads_synthesize)
898 {
899 struct synthesize_threads_arg *args = NULL;
900 pthread_t *synthesize_threads = NULL;
901 char proc_path[PATH_MAX];
902 struct dirent **dirent;
903 int num_per_thread;
904 int m, n, i, j;
905 int thread_nr;
906 int base = 0;
907 int err = -1;
908
909
910 if (machine__is_default_guest(machine))
911 return 0;
912
913 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
914 n = scandir(proc_path, &dirent, 0, alphasort);
915 if (n < 0)
916 return err;
917
918 if (nr_threads_synthesize == UINT_MAX)
919 thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
920 else
921 thread_nr = nr_threads_synthesize;
922
923 if (thread_nr <= 1) {
924 err = __perf_event__synthesize_threads(tool, process,
925 machine, mmap_data,
926 dirent, base, n);
927 goto free_dirent;
928 }
929 if (thread_nr > n)
930 thread_nr = n;
931
932 synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
933 if (synthesize_threads == NULL)
934 goto free_dirent;
935
936 args = calloc(sizeof(*args), thread_nr);
937 if (args == NULL)
938 goto free_threads;
939
940 num_per_thread = n / thread_nr;
941 m = n % thread_nr;
942 for (i = 0; i < thread_nr; i++) {
943 args[i].tool = tool;
944 args[i].process = process;
945 args[i].machine = machine;
946 args[i].mmap_data = mmap_data;
947 args[i].dirent = dirent;
948 }
949 for (i = 0; i < m; i++) {
950 args[i].num = num_per_thread + 1;
951 args[i].start = i * args[i].num;
952 }
953 if (i != 0)
954 base = args[i-1].start + args[i-1].num;
955 for (j = i; j < thread_nr; j++) {
956 args[j].num = num_per_thread;
957 args[j].start = base + (j - i) * args[i].num;
958 }
959
960 for (i = 0; i < thread_nr; i++) {
961 if (pthread_create(&synthesize_threads[i], NULL,
962 synthesize_threads_worker, &args[i]))
963 goto out_join;
964 }
965 err = 0;
966 out_join:
967 for (i = 0; i < thread_nr; i++)
968 pthread_join(synthesize_threads[i], NULL);
969 free(args);
970 free_threads:
971 free(synthesize_threads);
972 free_dirent:
973 for (i = 0; i < n; i++)
974 zfree(&dirent[i]);
975 free(dirent);
976
977 return err;
978 }
979
980 int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused,
981 perf_event__handler_t process __maybe_unused,
982 struct machine *machine __maybe_unused)
983 {
984 return 0;
985 }
986
987 static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
988 perf_event__handler_t process,
989 struct machine *machine)
990 {
991 size_t size;
992 struct map *map = machine__kernel_map(machine);
993 struct kmap *kmap;
994 int err;
995 union perf_event *event;
996
997 if (map == NULL)
998 return -1;
999
1000 kmap = map__kmap(map);
1001 if (!kmap->ref_reloc_sym)
1002 return -1;
1003
1004 /*
1005 * We should get this from /sys/kernel/sections/.text, but till that is
1006 * available use this, and after it is use this as a fallback for older
1007 * kernels.
1008 */
1009 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
1010 if (event == NULL) {
1011 pr_debug("Not enough memory synthesizing mmap event "
1012 "for kernel modules\n");
1013 return -1;
1014 }
1015
1016 if (machine__is_host(machine)) {
1017 /*
1018 * kernel uses PERF_RECORD_MISC_USER for user space maps,
1019 * see kernel/perf_event.c __perf_event_mmap
1020 */
1021 event->header.misc = PERF_RECORD_MISC_KERNEL;
1022 } else {
1023 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
1024 }
1025
1026 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
1027 "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
1028 size = PERF_ALIGN(size, sizeof(u64));
1029 event->mmap.header.type = PERF_RECORD_MMAP;
1030 event->mmap.header.size = (sizeof(event->mmap) -
1031 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
1032 event->mmap.pgoff = kmap->ref_reloc_sym->addr;
1033 event->mmap.start = map->start;
1034 event->mmap.len = map->end - event->mmap.start;
1035 event->mmap.pid = machine->pid;
1036
1037 err = perf_tool__process_synth_event(tool, event, machine, process);
1038 free(event);
1039
1040 return err;
1041 }
1042
1043 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
1044 perf_event__handler_t process,
1045 struct machine *machine)
1046 {
1047 int err;
1048
1049 err = __perf_event__synthesize_kernel_mmap(tool, process, machine);
1050 if (err < 0)
1051 return err;
1052
1053 return perf_event__synthesize_extra_kmaps(tool, process, machine);
1054 }
1055
1056 int perf_event__synthesize_thread_map2(struct perf_tool *tool,
1057 struct perf_thread_map *threads,
1058 perf_event__handler_t process,
1059 struct machine *machine)
1060 {
1061 union perf_event *event;
1062 int i, err, size;
1063
1064 size = sizeof(event->thread_map);
1065 size += threads->nr * sizeof(event->thread_map.entries[0]);
1066
1067 event = zalloc(size);
1068 if (!event)
1069 return -ENOMEM;
1070
1071 event->header.type = PERF_RECORD_THREAD_MAP;
1072 event->header.size = size;
1073 event->thread_map.nr = threads->nr;
1074
1075 for (i = 0; i < threads->nr; i++) {
1076 struct perf_record_thread_map_entry *entry = &event->thread_map.entries[i];
1077 char *comm = perf_thread_map__comm(threads, i);
1078
1079 if (!comm)
1080 comm = (char *) "";
1081
1082 entry->pid = perf_thread_map__pid(threads, i);
1083 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
1084 }
1085
1086 err = process(tool, event, NULL, machine);
1087
1088 free(event);
1089 return err;
1090 }
1091
1092 static void synthesize_cpus(struct cpu_map_entries *cpus,
1093 struct perf_cpu_map *map)
1094 {
1095 int i;
1096
1097 cpus->nr = map->nr;
1098
1099 for (i = 0; i < map->nr; i++)
1100 cpus->cpu[i] = map->map[i];
1101 }
1102
1103 static void synthesize_mask(struct perf_record_record_cpu_map *mask,
1104 struct perf_cpu_map *map, int max)
1105 {
1106 int i;
1107
1108 mask->nr = BITS_TO_LONGS(max);
1109 mask->long_size = sizeof(long);
1110
1111 for (i = 0; i < map->nr; i++)
1112 set_bit(map->map[i], mask->mask);
1113 }
1114
1115 static size_t cpus_size(struct perf_cpu_map *map)
1116 {
1117 return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
1118 }
1119
1120 static size_t mask_size(struct perf_cpu_map *map, int *max)
1121 {
1122 int i;
1123
1124 *max = 0;
1125
1126 for (i = 0; i < map->nr; i++) {
1127 /* bit possition of the cpu is + 1 */
1128 int bit = map->map[i] + 1;
1129
1130 if (bit > *max)
1131 *max = bit;
1132 }
1133
1134 return sizeof(struct perf_record_record_cpu_map) + BITS_TO_LONGS(*max) * sizeof(long);
1135 }
1136
1137 void *cpu_map_data__alloc(struct perf_cpu_map *map, size_t *size, u16 *type, int *max)
1138 {
1139 size_t size_cpus, size_mask;
1140 bool is_dummy = perf_cpu_map__empty(map);
1141
1142 /*
1143 * Both array and mask data have variable size based
1144 * on the number of cpus and their actual values.
1145 * The size of the 'struct perf_record_cpu_map_data' is:
1146 *
1147 * array = size of 'struct cpu_map_entries' +
1148 * number of cpus * sizeof(u64)
1149 *
1150 * mask = size of 'struct perf_record_record_cpu_map' +
1151 * maximum cpu bit converted to size of longs
1152 *
1153 * and finaly + the size of 'struct perf_record_cpu_map_data'.
1154 */
1155 size_cpus = cpus_size(map);
1156 size_mask = mask_size(map, max);
1157
1158 if (is_dummy || (size_cpus < size_mask)) {
1159 *size += size_cpus;
1160 *type = PERF_CPU_MAP__CPUS;
1161 } else {
1162 *size += size_mask;
1163 *type = PERF_CPU_MAP__MASK;
1164 }
1165
1166 *size += sizeof(struct perf_record_cpu_map_data);
1167 *size = PERF_ALIGN(*size, sizeof(u64));
1168 return zalloc(*size);
1169 }
1170
1171 void cpu_map_data__synthesize(struct perf_record_cpu_map_data *data, struct perf_cpu_map *map,
1172 u16 type, int max)
1173 {
1174 data->type = type;
1175
1176 switch (type) {
1177 case PERF_CPU_MAP__CPUS:
1178 synthesize_cpus((struct cpu_map_entries *) data->data, map);
1179 break;
1180 case PERF_CPU_MAP__MASK:
1181 synthesize_mask((struct perf_record_record_cpu_map *)data->data, map, max);
1182 default:
1183 break;
1184 }
1185 }
1186
1187 static struct perf_record_cpu_map *cpu_map_event__new(struct perf_cpu_map *map)
1188 {
1189 size_t size = sizeof(struct perf_record_cpu_map);
1190 struct perf_record_cpu_map *event;
1191 int max;
1192 u16 type;
1193
1194 event = cpu_map_data__alloc(map, &size, &type, &max);
1195 if (!event)
1196 return NULL;
1197
1198 event->header.type = PERF_RECORD_CPU_MAP;
1199 event->header.size = size;
1200 event->data.type = type;
1201
1202 cpu_map_data__synthesize(&event->data, map, type, max);
1203 return event;
1204 }
1205
1206 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
1207 struct perf_cpu_map *map,
1208 perf_event__handler_t process,
1209 struct machine *machine)
1210 {
1211 struct perf_record_cpu_map *event;
1212 int err;
1213
1214 event = cpu_map_event__new(map);
1215 if (!event)
1216 return -ENOMEM;
1217
1218 err = process(tool, (union perf_event *) event, NULL, machine);
1219
1220 free(event);
1221 return err;
1222 }
1223
1224 int perf_event__synthesize_stat_config(struct perf_tool *tool,
1225 struct perf_stat_config *config,
1226 perf_event__handler_t process,
1227 struct machine *machine)
1228 {
1229 struct perf_record_stat_config *event;
1230 int size, i = 0, err;
1231
1232 size = sizeof(*event);
1233 size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
1234
1235 event = zalloc(size);
1236 if (!event)
1237 return -ENOMEM;
1238
1239 event->header.type = PERF_RECORD_STAT_CONFIG;
1240 event->header.size = size;
1241 event->nr = PERF_STAT_CONFIG_TERM__MAX;
1242
1243 #define ADD(__term, __val) \
1244 event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \
1245 event->data[i].val = __val; \
1246 i++;
1247
1248 ADD(AGGR_MODE, config->aggr_mode)
1249 ADD(INTERVAL, config->interval)
1250 ADD(SCALE, config->scale)
1251
1252 WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
1253 "stat config terms unbalanced\n");
1254 #undef ADD
1255
1256 err = process(tool, (union perf_event *) event, NULL, machine);
1257
1258 free(event);
1259 return err;
1260 }
1261
1262 int perf_event__synthesize_stat(struct perf_tool *tool,
1263 u32 cpu, u32 thread, u64 id,
1264 struct perf_counts_values *count,
1265 perf_event__handler_t process,
1266 struct machine *machine)
1267 {
1268 struct perf_record_stat event;
1269
1270 event.header.type = PERF_RECORD_STAT;
1271 event.header.size = sizeof(event);
1272 event.header.misc = 0;
1273
1274 event.id = id;
1275 event.cpu = cpu;
1276 event.thread = thread;
1277 event.val = count->val;
1278 event.ena = count->ena;
1279 event.run = count->run;
1280
1281 return process(tool, (union perf_event *) &event, NULL, machine);
1282 }
1283
1284 int perf_event__synthesize_stat_round(struct perf_tool *tool,
1285 u64 evtime, u64 type,
1286 perf_event__handler_t process,
1287 struct machine *machine)
1288 {
1289 struct perf_record_stat_round event;
1290
1291 event.header.type = PERF_RECORD_STAT_ROUND;
1292 event.header.size = sizeof(event);
1293 event.header.misc = 0;
1294
1295 event.time = evtime;
1296 event.type = type;
1297
1298 return process(tool, (union perf_event *) &event, NULL, machine);
1299 }
1300
1301 size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type, u64 read_format)
1302 {
1303 size_t sz, result = sizeof(struct perf_record_sample);
1304
1305 if (type & PERF_SAMPLE_IDENTIFIER)
1306 result += sizeof(u64);
1307
1308 if (type & PERF_SAMPLE_IP)
1309 result += sizeof(u64);
1310
1311 if (type & PERF_SAMPLE_TID)
1312 result += sizeof(u64);
1313
1314 if (type & PERF_SAMPLE_TIME)
1315 result += sizeof(u64);
1316
1317 if (type & PERF_SAMPLE_ADDR)
1318 result += sizeof(u64);
1319
1320 if (type & PERF_SAMPLE_ID)
1321 result += sizeof(u64);
1322
1323 if (type & PERF_SAMPLE_STREAM_ID)
1324 result += sizeof(u64);
1325
1326 if (type & PERF_SAMPLE_CPU)
1327 result += sizeof(u64);
1328
1329 if (type & PERF_SAMPLE_PERIOD)
1330 result += sizeof(u64);
1331
1332 if (type & PERF_SAMPLE_READ) {
1333 result += sizeof(u64);
1334 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1335 result += sizeof(u64);
1336 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1337 result += sizeof(u64);
1338 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1339 if (read_format & PERF_FORMAT_GROUP) {
1340 sz = sample->read.group.nr *
1341 sizeof(struct sample_read_value);
1342 result += sz;
1343 } else {
1344 result += sizeof(u64);
1345 }
1346 }
1347
1348 if (type & PERF_SAMPLE_CALLCHAIN) {
1349 sz = (sample->callchain->nr + 1) * sizeof(u64);
1350 result += sz;
1351 }
1352
1353 if (type & PERF_SAMPLE_RAW) {
1354 result += sizeof(u32);
1355 result += sample->raw_size;
1356 }
1357
1358 if (type & PERF_SAMPLE_BRANCH_STACK) {
1359 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
1360 /* nr, hw_idx */
1361 sz += 2 * sizeof(u64);
1362 result += sz;
1363 }
1364
1365 if (type & PERF_SAMPLE_REGS_USER) {
1366 if (sample->user_regs.abi) {
1367 result += sizeof(u64);
1368 sz = hweight64(sample->user_regs.mask) * sizeof(u64);
1369 result += sz;
1370 } else {
1371 result += sizeof(u64);
1372 }
1373 }
1374
1375 if (type & PERF_SAMPLE_STACK_USER) {
1376 sz = sample->user_stack.size;
1377 result += sizeof(u64);
1378 if (sz) {
1379 result += sz;
1380 result += sizeof(u64);
1381 }
1382 }
1383
1384 if (type & PERF_SAMPLE_WEIGHT)
1385 result += sizeof(u64);
1386
1387 if (type & PERF_SAMPLE_DATA_SRC)
1388 result += sizeof(u64);
1389
1390 if (type & PERF_SAMPLE_TRANSACTION)
1391 result += sizeof(u64);
1392
1393 if (type & PERF_SAMPLE_REGS_INTR) {
1394 if (sample->intr_regs.abi) {
1395 result += sizeof(u64);
1396 sz = hweight64(sample->intr_regs.mask) * sizeof(u64);
1397 result += sz;
1398 } else {
1399 result += sizeof(u64);
1400 }
1401 }
1402
1403 if (type & PERF_SAMPLE_PHYS_ADDR)
1404 result += sizeof(u64);
1405
1406 if (type & PERF_SAMPLE_CGROUP)
1407 result += sizeof(u64);
1408
1409 if (type & PERF_SAMPLE_AUX) {
1410 result += sizeof(u64);
1411 result += sample->aux_sample.size;
1412 }
1413
1414 return result;
1415 }
1416
1417 int perf_event__synthesize_sample(union perf_event *event, u64 type, u64 read_format,
1418 const struct perf_sample *sample)
1419 {
1420 __u64 *array;
1421 size_t sz;
1422 /*
1423 * used for cross-endian analysis. See git commit 65014ab3
1424 * for why this goofiness is needed.
1425 */
1426 union u64_swap u;
1427
1428 array = event->sample.array;
1429
1430 if (type & PERF_SAMPLE_IDENTIFIER) {
1431 *array = sample->id;
1432 array++;
1433 }
1434
1435 if (type & PERF_SAMPLE_IP) {
1436 *array = sample->ip;
1437 array++;
1438 }
1439
1440 if (type & PERF_SAMPLE_TID) {
1441 u.val32[0] = sample->pid;
1442 u.val32[1] = sample->tid;
1443 *array = u.val64;
1444 array++;
1445 }
1446
1447 if (type & PERF_SAMPLE_TIME) {
1448 *array = sample->time;
1449 array++;
1450 }
1451
1452 if (type & PERF_SAMPLE_ADDR) {
1453 *array = sample->addr;
1454 array++;
1455 }
1456
1457 if (type & PERF_SAMPLE_ID) {
1458 *array = sample->id;
1459 array++;
1460 }
1461
1462 if (type & PERF_SAMPLE_STREAM_ID) {
1463 *array = sample->stream_id;
1464 array++;
1465 }
1466
1467 if (type & PERF_SAMPLE_CPU) {
1468 u.val32[0] = sample->cpu;
1469 u.val32[1] = 0;
1470 *array = u.val64;
1471 array++;
1472 }
1473
1474 if (type & PERF_SAMPLE_PERIOD) {
1475 *array = sample->period;
1476 array++;
1477 }
1478
1479 if (type & PERF_SAMPLE_READ) {
1480 if (read_format & PERF_FORMAT_GROUP)
1481 *array = sample->read.group.nr;
1482 else
1483 *array = sample->read.one.value;
1484 array++;
1485
1486 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
1487 *array = sample->read.time_enabled;
1488 array++;
1489 }
1490
1491 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
1492 *array = sample->read.time_running;
1493 array++;
1494 }
1495
1496 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1497 if (read_format & PERF_FORMAT_GROUP) {
1498 sz = sample->read.group.nr *
1499 sizeof(struct sample_read_value);
1500 memcpy(array, sample->read.group.values, sz);
1501 array = (void *)array + sz;
1502 } else {
1503 *array = sample->read.one.id;
1504 array++;
1505 }
1506 }
1507
1508 if (type & PERF_SAMPLE_CALLCHAIN) {
1509 sz = (sample->callchain->nr + 1) * sizeof(u64);
1510 memcpy(array, sample->callchain, sz);
1511 array = (void *)array + sz;
1512 }
1513
1514 if (type & PERF_SAMPLE_RAW) {
1515 u.val32[0] = sample->raw_size;
1516 *array = u.val64;
1517 array = (void *)array + sizeof(u32);
1518
1519 memcpy(array, sample->raw_data, sample->raw_size);
1520 array = (void *)array + sample->raw_size;
1521 }
1522
1523 if (type & PERF_SAMPLE_BRANCH_STACK) {
1524 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
1525 /* nr, hw_idx */
1526 sz += 2 * sizeof(u64);
1527 memcpy(array, sample->branch_stack, sz);
1528 array = (void *)array + sz;
1529 }
1530
1531 if (type & PERF_SAMPLE_REGS_USER) {
1532 if (sample->user_regs.abi) {
1533 *array++ = sample->user_regs.abi;
1534 sz = hweight64(sample->user_regs.mask) * sizeof(u64);
1535 memcpy(array, sample->user_regs.regs, sz);
1536 array = (void *)array + sz;
1537 } else {
1538 *array++ = 0;
1539 }
1540 }
1541
1542 if (type & PERF_SAMPLE_STACK_USER) {
1543 sz = sample->user_stack.size;
1544 *array++ = sz;
1545 if (sz) {
1546 memcpy(array, sample->user_stack.data, sz);
1547 array = (void *)array + sz;
1548 *array++ = sz;
1549 }
1550 }
1551
1552 if (type & PERF_SAMPLE_WEIGHT) {
1553 *array = sample->weight;
1554 array++;
1555 }
1556
1557 if (type & PERF_SAMPLE_DATA_SRC) {
1558 *array = sample->data_src;
1559 array++;
1560 }
1561
1562 if (type & PERF_SAMPLE_TRANSACTION) {
1563 *array = sample->transaction;
1564 array++;
1565 }
1566
1567 if (type & PERF_SAMPLE_REGS_INTR) {
1568 if (sample->intr_regs.abi) {
1569 *array++ = sample->intr_regs.abi;
1570 sz = hweight64(sample->intr_regs.mask) * sizeof(u64);
1571 memcpy(array, sample->intr_regs.regs, sz);
1572 array = (void *)array + sz;
1573 } else {
1574 *array++ = 0;
1575 }
1576 }
1577
1578 if (type & PERF_SAMPLE_PHYS_ADDR) {
1579 *array = sample->phys_addr;
1580 array++;
1581 }
1582
1583 if (type & PERF_SAMPLE_CGROUP) {
1584 *array = sample->cgroup;
1585 array++;
1586 }
1587
1588 if (type & PERF_SAMPLE_AUX) {
1589 sz = sample->aux_sample.size;
1590 *array++ = sz;
1591 memcpy(array, sample->aux_sample.data, sz);
1592 array = (void *)array + sz;
1593 }
1594
1595 return 0;
1596 }
1597
1598 int perf_event__synthesize_id_index(struct perf_tool *tool, perf_event__handler_t process,
1599 struct evlist *evlist, struct machine *machine)
1600 {
1601 union perf_event *ev;
1602 struct evsel *evsel;
1603 size_t nr = 0, i = 0, sz, max_nr, n;
1604 int err;
1605
1606 pr_debug2("Synthesizing id index\n");
1607
1608 max_nr = (UINT16_MAX - sizeof(struct perf_record_id_index)) /
1609 sizeof(struct id_index_entry);
1610
1611 evlist__for_each_entry(evlist, evsel)
1612 nr += evsel->core.ids;
1613
1614 n = nr > max_nr ? max_nr : nr;
1615 sz = sizeof(struct perf_record_id_index) + n * sizeof(struct id_index_entry);
1616 ev = zalloc(sz);
1617 if (!ev)
1618 return -ENOMEM;
1619
1620 ev->id_index.header.type = PERF_RECORD_ID_INDEX;
1621 ev->id_index.header.size = sz;
1622 ev->id_index.nr = n;
1623
1624 evlist__for_each_entry(evlist, evsel) {
1625 u32 j;
1626
1627 for (j = 0; j < evsel->core.ids; j++) {
1628 struct id_index_entry *e;
1629 struct perf_sample_id *sid;
1630
1631 if (i >= n) {
1632 err = process(tool, ev, NULL, machine);
1633 if (err)
1634 goto out_err;
1635 nr -= n;
1636 i = 0;
1637 }
1638
1639 e = &ev->id_index.entries[i++];
1640
1641 e->id = evsel->core.id[j];
1642
1643 sid = perf_evlist__id2sid(evlist, e->id);
1644 if (!sid) {
1645 free(ev);
1646 return -ENOENT;
1647 }
1648
1649 e->idx = sid->idx;
1650 e->cpu = sid->cpu;
1651 e->tid = sid->tid;
1652 }
1653 }
1654
1655 sz = sizeof(struct perf_record_id_index) + nr * sizeof(struct id_index_entry);
1656 ev->id_index.header.size = sz;
1657 ev->id_index.nr = nr;
1658
1659 err = process(tool, ev, NULL, machine);
1660 out_err:
1661 free(ev);
1662
1663 return err;
1664 }
1665
1666 int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
1667 struct target *target, struct perf_thread_map *threads,
1668 perf_event__handler_t process, bool data_mmap,
1669 unsigned int nr_threads_synthesize)
1670 {
1671 if (target__has_task(target))
1672 return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap);
1673 else if (target__has_cpu(target))
1674 return perf_event__synthesize_threads(tool, process,
1675 machine, data_mmap,
1676 nr_threads_synthesize);
1677 /* command specified */
1678 return 0;
1679 }
1680
1681 int machine__synthesize_threads(struct machine *machine, struct target *target,
1682 struct perf_thread_map *threads, bool data_mmap,
1683 unsigned int nr_threads_synthesize)
1684 {
1685 return __machine__synthesize_threads(machine, NULL, target, threads,
1686 perf_event__process, data_mmap,
1687 nr_threads_synthesize);
1688 }
1689
1690 static struct perf_record_event_update *event_update_event__new(size_t size, u64 type, u64 id)
1691 {
1692 struct perf_record_event_update *ev;
1693
1694 size += sizeof(*ev);
1695 size = PERF_ALIGN(size, sizeof(u64));
1696
1697 ev = zalloc(size);
1698 if (ev) {
1699 ev->header.type = PERF_RECORD_EVENT_UPDATE;
1700 ev->header.size = (u16)size;
1701 ev->type = type;
1702 ev->id = id;
1703 }
1704 return ev;
1705 }
1706
1707 int perf_event__synthesize_event_update_unit(struct perf_tool *tool, struct evsel *evsel,
1708 perf_event__handler_t process)
1709 {
1710 size_t size = strlen(evsel->unit);
1711 struct perf_record_event_update *ev;
1712 int err;
1713
1714 ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->core.id[0]);
1715 if (ev == NULL)
1716 return -ENOMEM;
1717
1718 strlcpy(ev->data, evsel->unit, size + 1);
1719 err = process(tool, (union perf_event *)ev, NULL, NULL);
1720 free(ev);
1721 return err;
1722 }
1723
1724 int perf_event__synthesize_event_update_scale(struct perf_tool *tool, struct evsel *evsel,
1725 perf_event__handler_t process)
1726 {
1727 struct perf_record_event_update *ev;
1728 struct perf_record_event_update_scale *ev_data;
1729 int err;
1730
1731 ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->core.id[0]);
1732 if (ev == NULL)
1733 return -ENOMEM;
1734
1735 ev_data = (struct perf_record_event_update_scale *)ev->data;
1736 ev_data->scale = evsel->scale;
1737 err = process(tool, (union perf_event *)ev, NULL, NULL);
1738 free(ev);
1739 return err;
1740 }
1741
1742 int perf_event__synthesize_event_update_name(struct perf_tool *tool, struct evsel *evsel,
1743 perf_event__handler_t process)
1744 {
1745 struct perf_record_event_update *ev;
1746 size_t len = strlen(evsel->name);
1747 int err;
1748
1749 ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->core.id[0]);
1750 if (ev == NULL)
1751 return -ENOMEM;
1752
1753 strlcpy(ev->data, evsel->name, len + 1);
1754 err = process(tool, (union perf_event *)ev, NULL, NULL);
1755 free(ev);
1756 return err;
1757 }
1758
1759 int perf_event__synthesize_event_update_cpus(struct perf_tool *tool, struct evsel *evsel,
1760 perf_event__handler_t process)
1761 {
1762 size_t size = sizeof(struct perf_record_event_update);
1763 struct perf_record_event_update *ev;
1764 int max, err;
1765 u16 type;
1766
1767 if (!evsel->core.own_cpus)
1768 return 0;
1769
1770 ev = cpu_map_data__alloc(evsel->core.own_cpus, &size, &type, &max);
1771 if (!ev)
1772 return -ENOMEM;
1773
1774 ev->header.type = PERF_RECORD_EVENT_UPDATE;
1775 ev->header.size = (u16)size;
1776 ev->type = PERF_EVENT_UPDATE__CPUS;
1777 ev->id = evsel->core.id[0];
1778
1779 cpu_map_data__synthesize((struct perf_record_cpu_map_data *)ev->data,
1780 evsel->core.own_cpus, type, max);
1781
1782 err = process(tool, (union perf_event *)ev, NULL, NULL);
1783 free(ev);
1784 return err;
1785 }
1786
1787 int perf_event__synthesize_attrs(struct perf_tool *tool, struct evlist *evlist,
1788 perf_event__handler_t process)
1789 {
1790 struct evsel *evsel;
1791 int err = 0;
1792
1793 evlist__for_each_entry(evlist, evsel) {
1794 err = perf_event__synthesize_attr(tool, &evsel->core.attr, evsel->core.ids,
1795 evsel->core.id, process);
1796 if (err) {
1797 pr_debug("failed to create perf header attribute\n");
1798 return err;
1799 }
1800 }
1801
1802 return err;
1803 }
1804
1805 static bool has_unit(struct evsel *evsel)
1806 {
1807 return evsel->unit && *evsel->unit;
1808 }
1809
1810 static bool has_scale(struct evsel *evsel)
1811 {
1812 return evsel->scale != 1;
1813 }
1814
1815 int perf_event__synthesize_extra_attr(struct perf_tool *tool, struct evlist *evsel_list,
1816 perf_event__handler_t process, bool is_pipe)
1817 {
1818 struct evsel *evsel;
1819 int err;
1820
1821 /*
1822 * Synthesize other events stuff not carried within
1823 * attr event - unit, scale, name
1824 */
1825 evlist__for_each_entry(evsel_list, evsel) {
1826 if (!evsel->supported)
1827 continue;
1828
1829 /*
1830 * Synthesize unit and scale only if it's defined.
1831 */
1832 if (has_unit(evsel)) {
1833 err = perf_event__synthesize_event_update_unit(tool, evsel, process);
1834 if (err < 0) {
1835 pr_err("Couldn't synthesize evsel unit.\n");
1836 return err;
1837 }
1838 }
1839
1840 if (has_scale(evsel)) {
1841 err = perf_event__synthesize_event_update_scale(tool, evsel, process);
1842 if (err < 0) {
1843 pr_err("Couldn't synthesize evsel evsel.\n");
1844 return err;
1845 }
1846 }
1847
1848 if (evsel->core.own_cpus) {
1849 err = perf_event__synthesize_event_update_cpus(tool, evsel, process);
1850 if (err < 0) {
1851 pr_err("Couldn't synthesize evsel cpus.\n");
1852 return err;
1853 }
1854 }
1855
1856 /*
1857 * Name is needed only for pipe output,
1858 * perf.data carries event names.
1859 */
1860 if (is_pipe) {
1861 err = perf_event__synthesize_event_update_name(tool, evsel, process);
1862 if (err < 0) {
1863 pr_err("Couldn't synthesize evsel name.\n");
1864 return err;
1865 }
1866 }
1867 }
1868 return 0;
1869 }
1870
1871 int perf_event__synthesize_attr(struct perf_tool *tool, struct perf_event_attr *attr,
1872 u32 ids, u64 *id, perf_event__handler_t process)
1873 {
1874 union perf_event *ev;
1875 size_t size;
1876 int err;
1877
1878 size = sizeof(struct perf_event_attr);
1879 size = PERF_ALIGN(size, sizeof(u64));
1880 size += sizeof(struct perf_event_header);
1881 size += ids * sizeof(u64);
1882
1883 ev = zalloc(size);
1884
1885 if (ev == NULL)
1886 return -ENOMEM;
1887
1888 ev->attr.attr = *attr;
1889 memcpy(ev->attr.id, id, ids * sizeof(u64));
1890
1891 ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
1892 ev->attr.header.size = (u16)size;
1893
1894 if (ev->attr.header.size == size)
1895 err = process(tool, ev, NULL, NULL);
1896 else
1897 err = -E2BIG;
1898
1899 free(ev);
1900
1901 return err;
1902 }
1903
1904 int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd, struct evlist *evlist,
1905 perf_event__handler_t process)
1906 {
1907 union perf_event ev;
1908 struct tracing_data *tdata;
1909 ssize_t size = 0, aligned_size = 0, padding;
1910 struct feat_fd ff;
1911
1912 /*
1913 * We are going to store the size of the data followed
1914 * by the data contents. Since the fd descriptor is a pipe,
1915 * we cannot seek back to store the size of the data once
1916 * we know it. Instead we:
1917 *
1918 * - write the tracing data to the temp file
1919 * - get/write the data size to pipe
1920 * - write the tracing data from the temp file
1921 * to the pipe
1922 */
1923 tdata = tracing_data_get(&evlist->core.entries, fd, true);
1924 if (!tdata)
1925 return -1;
1926
1927 memset(&ev, 0, sizeof(ev));
1928
1929 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
1930 size = tdata->size;
1931 aligned_size = PERF_ALIGN(size, sizeof(u64));
1932 padding = aligned_size - size;
1933 ev.tracing_data.header.size = sizeof(ev.tracing_data);
1934 ev.tracing_data.size = aligned_size;
1935
1936 process(tool, &ev, NULL, NULL);
1937
1938 /*
1939 * The put function will copy all the tracing data
1940 * stored in temp file to the pipe.
1941 */
1942 tracing_data_put(tdata);
1943
1944 ff = (struct feat_fd){ .fd = fd };
1945 if (write_padded(&ff, NULL, 0, padding))
1946 return -1;
1947
1948 return aligned_size;
1949 }
1950
1951 int perf_event__synthesize_build_id(struct perf_tool *tool, struct dso *pos, u16 misc,
1952 perf_event__handler_t process, struct machine *machine)
1953 {
1954 union perf_event ev;
1955 size_t len;
1956
1957 if (!pos->hit)
1958 return 0;
1959
1960 memset(&ev, 0, sizeof(ev));
1961
1962 len = pos->long_name_len + 1;
1963 len = PERF_ALIGN(len, NAME_ALIGN);
1964 memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
1965 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
1966 ev.build_id.header.misc = misc;
1967 ev.build_id.pid = machine->pid;
1968 ev.build_id.header.size = sizeof(ev.build_id) + len;
1969 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
1970
1971 return process(tool, &ev, NULL, machine);
1972 }
1973
1974 int perf_event__synthesize_stat_events(struct perf_stat_config *config, struct perf_tool *tool,
1975 struct evlist *evlist, perf_event__handler_t process, bool attrs)
1976 {
1977 int err;
1978
1979 if (attrs) {
1980 err = perf_event__synthesize_attrs(tool, evlist, process);
1981 if (err < 0) {
1982 pr_err("Couldn't synthesize attrs.\n");
1983 return err;
1984 }
1985 }
1986
1987 err = perf_event__synthesize_extra_attr(tool, evlist, process, attrs);
1988 err = perf_event__synthesize_thread_map2(tool, evlist->core.threads, process, NULL);
1989 if (err < 0) {
1990 pr_err("Couldn't synthesize thread map.\n");
1991 return err;
1992 }
1993
1994 err = perf_event__synthesize_cpu_map(tool, evlist->core.cpus, process, NULL);
1995 if (err < 0) {
1996 pr_err("Couldn't synthesize thread map.\n");
1997 return err;
1998 }
1999
2000 err = perf_event__synthesize_stat_config(tool, config, process, NULL);
2001 if (err < 0) {
2002 pr_err("Couldn't synthesize config.\n");
2003 return err;
2004 }
2005
2006 return 0;
2007 }
2008
2009 int __weak perf_event__synth_time_conv(const struct perf_event_mmap_page *pc __maybe_unused,
2010 struct perf_tool *tool __maybe_unused,
2011 perf_event__handler_t process __maybe_unused,
2012 struct machine *machine __maybe_unused)
2013 {
2014 return 0;
2015 }
2016
2017 extern const struct perf_header_feature_ops feat_ops[HEADER_LAST_FEATURE];
2018
2019 int perf_event__synthesize_features(struct perf_tool *tool, struct perf_session *session,
2020 struct evlist *evlist, perf_event__handler_t process)
2021 {
2022 struct perf_header *header = &session->header;
2023 struct perf_record_header_feature *fe;
2024 struct feat_fd ff;
2025 size_t sz, sz_hdr;
2026 int feat, ret;
2027
2028 sz_hdr = sizeof(fe->header);
2029 sz = sizeof(union perf_event);
2030 /* get a nice alignment */
2031 sz = PERF_ALIGN(sz, page_size);
2032
2033 memset(&ff, 0, sizeof(ff));
2034
2035 ff.buf = malloc(sz);
2036 if (!ff.buf)
2037 return -ENOMEM;
2038
2039 ff.size = sz - sz_hdr;
2040 ff.ph = &session->header;
2041
2042 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
2043 if (!feat_ops[feat].synthesize) {
2044 pr_debug("No record header feature for header :%d\n", feat);
2045 continue;
2046 }
2047
2048 ff.offset = sizeof(*fe);
2049
2050 ret = feat_ops[feat].write(&ff, evlist);
2051 if (ret || ff.offset <= (ssize_t)sizeof(*fe)) {
2052 pr_debug("Error writing feature\n");
2053 continue;
2054 }
2055 /* ff.buf may have changed due to realloc in do_write() */
2056 fe = ff.buf;
2057 memset(fe, 0, sizeof(*fe));
2058
2059 fe->feat_id = feat;
2060 fe->header.type = PERF_RECORD_HEADER_FEATURE;
2061 fe->header.size = ff.offset;
2062
2063 ret = process(tool, ff.buf, NULL, NULL);
2064 if (ret) {
2065 free(ff.buf);
2066 return ret;
2067 }
2068 }
2069
2070 /* Send HEADER_LAST_FEATURE mark. */
2071 fe = ff.buf;
2072 fe->feat_id = HEADER_LAST_FEATURE;
2073 fe->header.type = PERF_RECORD_HEADER_FEATURE;
2074 fe->header.size = sizeof(*fe);
2075
2076 ret = process(tool, ff.buf, NULL, NULL);
2077
2078 free(ff.buf);
2079 return ret;
2080 }
Linux with added FPC-III support