1
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 <perf/cpumap.h>
28#include <internal/lib.h>
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>
38#include <api/fs/fs.h>
39#include <api/io.h>
40#include <sys/types.h>
41#include <sys/stat.h>
42#include <fcntl.h>
43#include <unistd.h>
44
45#define DEFAULT_PROC_MAP_PARSE_TIMEOUT 500
46
47unsigned int proc_map_timeout = DEFAULT_PROC_MAP_PARSE_TIMEOUT;
48
49int perf_tool__process_synth_event(struct perf_tool *tool,
50 union perf_event *event,
51 struct machine *machine,
52 perf_event__handler_t process)
53{
54 struct perf_sample synth_sample = {
55 .pid = -1,
56 .tid = -1,
57 .time = -1,
58 .stream_id = -1,
59 .cpu = -1,
60 .period = 1,
61 .cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
62 };
63
64 return process(tool, event, &synth_sample, machine);
65};
66
67
68
69
70
71static int perf_event__get_comm_ids(pid_t pid, pid_t tid, char *comm, size_t len,
72 pid_t *tgid, pid_t *ppid, bool *kernel)
73{
74 char bf[4096];
75 int fd;
76 size_t size = 0;
77 ssize_t n;
78 char *name, *tgids, *ppids, *vmpeak, *threads;
79
80 *tgid = -1;
81 *ppid = -1;
82
83 if (pid)
84 snprintf(bf, sizeof(bf), "/proc/%d/task/%d/status", pid, tid);
85 else
86 snprintf(bf, sizeof(bf), "/proc/%d/status", tid);
87
88 fd = open(bf, O_RDONLY);
89 if (fd < 0) {
90 pr_debug("couldn't open %s\n", bf);
91 return -1;
92 }
93
94 n = read(fd, bf, sizeof(bf) - 1);
95 close(fd);
96 if (n <= 0) {
97 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
98 tid);
99 return -1;
100 }
101 bf[n] = '\0';
102
103 name = strstr(bf, "Name:");
104 tgids = strstr(name ?: bf, "Tgid:");
105 ppids = strstr(tgids ?: bf, "PPid:");
106 vmpeak = strstr(ppids ?: bf, "VmPeak:");
107
108 if (vmpeak)
109 threads = NULL;
110 else
111 threads = strstr(ppids ?: bf, "Threads:");
112
113 if (name) {
114 char *nl;
115
116 name = skip_spaces(name + 5);
117 nl = strchr(name, '\n');
118 if (nl)
119 *nl = '\0';
120
121 size = strlen(name);
122 if (size >= len)
123 size = len - 1;
124 memcpy(comm, name, size);
125 comm[size] = '\0';
126 } else {
127 pr_debug("Name: string not found for pid %d\n", tid);
128 }
129
130 if (tgids) {
131 tgids += 5;
132 *tgid = atoi(tgids);
133 } else {
134 pr_debug("Tgid: string not found for pid %d\n", tid);
135 }
136
137 if (ppids) {
138 ppids += 5;
139 *ppid = atoi(ppids);
140 } else {
141 pr_debug("PPid: string not found for pid %d\n", tid);
142 }
143
144 if (!vmpeak && threads)
145 *kernel = true;
146 else
147 *kernel = false;
148
149 return 0;
150}
151
152static int perf_event__prepare_comm(union perf_event *event, pid_t pid, pid_t tid,
153 struct machine *machine,
154 pid_t *tgid, pid_t *ppid, bool *kernel)
155{
156 size_t size;
157
158 *ppid = -1;
159
160 memset(&event->comm, 0, sizeof(event->comm));
161
162 if (machine__is_host(machine)) {
163 if (perf_event__get_comm_ids(pid, tid, event->comm.comm,
164 sizeof(event->comm.comm),
165 tgid, ppid, kernel) != 0) {
166 return -1;
167 }
168 } else {
169 *tgid = machine->pid;
170 }
171
172 if (*tgid < 0)
173 return -1;
174
175 event->comm.pid = *tgid;
176 event->comm.header.type = PERF_RECORD_COMM;
177
178 size = strlen(event->comm.comm) + 1;
179 size = PERF_ALIGN(size, sizeof(u64));
180 memset(event->comm.comm + size, 0, machine->id_hdr_size);
181 event->comm.header.size = (sizeof(event->comm) -
182 (sizeof(event->comm.comm) - size) +
183 machine->id_hdr_size);
184 event->comm.tid = tid;
185
186 return 0;
187}
188
189pid_t perf_event__synthesize_comm(struct perf_tool *tool,
190 union perf_event *event, pid_t pid,
191 perf_event__handler_t process,
192 struct machine *machine)
193{
194 pid_t tgid, ppid;
195 bool kernel_thread;
196
197 if (perf_event__prepare_comm(event, 0, pid, machine, &tgid, &ppid,
198 &kernel_thread) != 0)
199 return -1;
200
201 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
202 return -1;
203
204 return tgid;
205}
206
207static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
208 struct perf_ns_link_info *ns_link_info)
209{
210 struct stat64 st;
211 char proc_ns[128];
212
213 sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
214 if (stat64(proc_ns, &st) == 0) {
215 ns_link_info->dev = st.st_dev;
216 ns_link_info->ino = st.st_ino;
217 }
218}
219
220int perf_event__synthesize_namespaces(struct perf_tool *tool,
221 union perf_event *event,
222 pid_t pid, pid_t tgid,
223 perf_event__handler_t process,
224 struct machine *machine)
225{
226 u32 idx;
227 struct perf_ns_link_info *ns_link_info;
228
229 if (!tool || !tool->namespace_events)
230 return 0;
231
232 memset(&event->namespaces, 0, (sizeof(event->namespaces) +
233 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
234 machine->id_hdr_size));
235
236 event->namespaces.pid = tgid;
237 event->namespaces.tid = pid;
238
239 event->namespaces.nr_namespaces = NR_NAMESPACES;
240
241 ns_link_info = event->namespaces.link_info;
242
243 for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
244 perf_event__get_ns_link_info(pid, perf_ns__name(idx),
245 &ns_link_info[idx]);
246
247 event->namespaces.header.type = PERF_RECORD_NAMESPACES;
248
249 event->namespaces.header.size = (sizeof(event->namespaces) +
250 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
251 machine->id_hdr_size);
252
253 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
254 return -1;
255
256 return 0;
257}
258
259static int perf_event__synthesize_fork(struct perf_tool *tool,
260 union perf_event *event,
261 pid_t pid, pid_t tgid, pid_t ppid,
262 perf_event__handler_t process,
263 struct machine *machine)
264{
265 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
266
267
268
269
270
271
272 if (tgid == pid) {
273 event->fork.ppid = ppid;
274 event->fork.ptid = ppid;
275 } else {
276 event->fork.ppid = tgid;
277 event->fork.ptid = tgid;
278 }
279 event->fork.pid = tgid;
280 event->fork.tid = pid;
281 event->fork.header.type = PERF_RECORD_FORK;
282 event->fork.header.misc = PERF_RECORD_MISC_FORK_EXEC;
283
284 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
285
286 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
287 return -1;
288
289 return 0;
290}
291
292static bool read_proc_maps_line(struct io *io, __u64 *start, __u64 *end,
293 u32 *prot, u32 *flags, __u64 *offset,
294 u32 *maj, u32 *min,
295 __u64 *inode,
296 ssize_t pathname_size, char *pathname)
297{
298 __u64 temp;
299 int ch;
300 char *start_pathname = pathname;
301
302 if (io__get_hex(io, start) != '-')
303 return false;
304 if (io__get_hex(io, end) != ' ')
305 return false;
306
307
308 *prot = 0;
309 ch = io__get_char(io);
310 if (ch == 'r')
311 *prot |= PROT_READ;
312 else if (ch != '-')
313 return false;
314 ch = io__get_char(io);
315 if (ch == 'w')
316 *prot |= PROT_WRITE;
317 else if (ch != '-')
318 return false;
319 ch = io__get_char(io);
320 if (ch == 'x')
321 *prot |= PROT_EXEC;
322 else if (ch != '-')
323 return false;
324 ch = io__get_char(io);
325 if (ch == 's')
326 *flags = MAP_SHARED;
327 else if (ch == 'p')
328 *flags = MAP_PRIVATE;
329 else
330 return false;
331 if (io__get_char(io) != ' ')
332 return false;
333
334 if (io__get_hex(io, offset) != ' ')
335 return false;
336
337 if (io__get_hex(io, &temp) != ':')
338 return false;
339 *maj = temp;
340 if (io__get_hex(io, &temp) != ' ')
341 return false;
342 *min = temp;
343
344 ch = io__get_dec(io, inode);
345 if (ch != ' ') {
346 *pathname = '\0';
347 return ch == '\n';
348 }
349 do {
350 ch = io__get_char(io);
351 } while (ch == ' ');
352 while (true) {
353 if (ch < 0)
354 return false;
355 if (ch == '\0' || ch == '\n' ||
356 (pathname + 1 - start_pathname) >= pathname_size) {
357 *pathname = '\0';
358 return true;
359 }
360 *pathname++ = ch;
361 ch = io__get_char(io);
362 }
363}
364
365static void perf_record_mmap2__read_build_id(struct perf_record_mmap2 *event,
366 bool is_kernel)
367{
368 struct build_id bid;
369 int rc;
370
371 if (is_kernel)
372 rc = sysfs__read_build_id("/sys/kernel/notes", &bid);
373 else
374 rc = filename__read_build_id(event->filename, &bid) > 0 ? 0 : -1;
375
376 if (rc == 0) {
377 memcpy(event->build_id, bid.data, sizeof(bid.data));
378 event->build_id_size = (u8) bid.size;
379 event->header.misc |= PERF_RECORD_MISC_MMAP_BUILD_ID;
380 event->__reserved_1 = 0;
381 event->__reserved_2 = 0;
382 } else {
383 if (event->filename[0] == '/') {
384 pr_debug2("Failed to read build ID for %s\n",
385 event->filename);
386 }
387 }
388}
389
390int perf_event__synthesize_mmap_events(struct perf_tool *tool,
391 union perf_event *event,
392 pid_t pid, pid_t tgid,
393 perf_event__handler_t process,
394 struct machine *machine,
395 bool mmap_data)
396{
397 unsigned long long t;
398 char bf[BUFSIZ];
399 struct io io;
400 bool truncation = false;
401 unsigned long long timeout = proc_map_timeout * 1000000ULL;
402 int rc = 0;
403 const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
404 int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
405
406 if (machine__is_default_guest(machine))
407 return 0;
408
409 snprintf(bf, sizeof(bf), "%s/proc/%d/task/%d/maps",
410 machine->root_dir, pid, pid);
411
412 io.fd = open(bf, O_RDONLY, 0);
413 if (io.fd < 0) {
414
415
416
417 pr_debug("couldn't open %s\n", bf);
418 return -1;
419 }
420 io__init(&io, io.fd, bf, sizeof(bf));
421
422 event->header.type = PERF_RECORD_MMAP2;
423 t = rdclock();
424
425 while (!io.eof) {
426 static const char anonstr[] = "//anon";
427 size_t size, aligned_size;
428
429
430 event->mmap2.filename[0] = '\0';
431
432
433 if (!read_proc_maps_line(&io,
434 &event->mmap2.start,
435 &event->mmap2.len,
436 &event->mmap2.prot,
437 &event->mmap2.flags,
438 &event->mmap2.pgoff,
439 &event->mmap2.maj,
440 &event->mmap2.min,
441 &event->mmap2.ino,
442 sizeof(event->mmap2.filename),
443 event->mmap2.filename))
444 continue;
445
446 if ((rdclock() - t) > timeout) {
447 pr_warning("Reading %s/proc/%d/task/%d/maps time out. "
448 "You may want to increase "
449 "the time limit by --proc-map-timeout\n",
450 machine->root_dir, pid, pid);
451 truncation = true;
452 goto out;
453 }
454
455 event->mmap2.ino_generation = 0;
456
457
458
459
460 if (machine__is_host(machine))
461 event->header.misc = PERF_RECORD_MISC_USER;
462 else
463 event->header.misc = PERF_RECORD_MISC_GUEST_USER;
464
465 if ((event->mmap2.prot & PROT_EXEC) == 0) {
466 if (!mmap_data || (event->mmap2.prot & PROT_READ) == 0)
467 continue;
468
469 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
470 }
471
472out:
473 if (truncation)
474 event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
475
476 if (!strcmp(event->mmap2.filename, ""))
477 strcpy(event->mmap2.filename, anonstr);
478
479 if (hugetlbfs_mnt_len &&
480 !strncmp(event->mmap2.filename, hugetlbfs_mnt,
481 hugetlbfs_mnt_len)) {
482 strcpy(event->mmap2.filename, anonstr);
483 event->mmap2.flags |= MAP_HUGETLB;
484 }
485
486 size = strlen(event->mmap2.filename) + 1;
487 aligned_size = PERF_ALIGN(size, sizeof(u64));
488 event->mmap2.len -= event->mmap.start;
489 event->mmap2.header.size = (sizeof(event->mmap2) -
490 (sizeof(event->mmap2.filename) - aligned_size));
491 memset(event->mmap2.filename + size, 0, machine->id_hdr_size +
492 (aligned_size - size));
493 event->mmap2.header.size += machine->id_hdr_size;
494 event->mmap2.pid = tgid;
495 event->mmap2.tid = pid;
496
497 if (symbol_conf.buildid_mmap2)
498 perf_record_mmap2__read_build_id(&event->mmap2, false);
499
500 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
501 rc = -1;
502 break;
503 }
504
505 if (truncation)
506 break;
507 }
508
509 close(io.fd);
510 return rc;
511}
512
513#ifdef HAVE_FILE_HANDLE
514static int perf_event__synthesize_cgroup(struct perf_tool *tool,
515 union perf_event *event,
516 char *path, size_t mount_len,
517 perf_event__handler_t process,
518 struct machine *machine)
519{
520 size_t event_size = sizeof(event->cgroup) - sizeof(event->cgroup.path);
521 size_t path_len = strlen(path) - mount_len + 1;
522 struct {
523 struct file_handle fh;
524 uint64_t cgroup_id;
525 } handle;
526 int mount_id;
527
528 while (path_len % sizeof(u64))
529 path[mount_len + path_len++] = '\0';
530
531 memset(&event->cgroup, 0, event_size);
532
533 event->cgroup.header.type = PERF_RECORD_CGROUP;
534 event->cgroup.header.size = event_size + path_len + machine->id_hdr_size;
535
536 handle.fh.handle_bytes = sizeof(handle.cgroup_id);
537 if (name_to_handle_at(AT_FDCWD, path, &handle.fh, &mount_id, 0) < 0) {
538 pr_debug("stat failed: %s\n", path);
539 return -1;
540 }
541
542 event->cgroup.id = handle.cgroup_id;
543 strncpy(event->cgroup.path, path + mount_len, path_len);
544 memset(event->cgroup.path + path_len, 0, machine->id_hdr_size);
545
546 if (perf_tool__process_synth_event(tool, event, machine, process) < 0) {
547 pr_debug("process synth event failed\n");
548 return -1;
549 }
550
551 return 0;
552}
553
554static int perf_event__walk_cgroup_tree(struct perf_tool *tool,
555 union perf_event *event,
556 char *path, size_t mount_len,
557 perf_event__handler_t process,
558 struct machine *machine)
559{
560 size_t pos = strlen(path);
561 DIR *d;
562 struct dirent *dent;
563 int ret = 0;
564
565 if (perf_event__synthesize_cgroup(tool, event, path, mount_len,
566 process, machine) < 0)
567 return -1;
568
569 d = opendir(path);
570 if (d == NULL) {
571 pr_debug("failed to open directory: %s\n", path);
572 return -1;
573 }
574
575 while ((dent = readdir(d)) != NULL) {
576 if (dent->d_type != DT_DIR)
577 continue;
578 if (!strcmp(dent->d_name, ".") ||
579 !strcmp(dent->d_name, ".."))
580 continue;
581
582
583 if (strlen(path) + strlen(dent->d_name) + 1 >= PATH_MAX)
584 continue;
585
586 if (path[pos - 1] != '/')
587 strcat(path, "/");
588 strcat(path, dent->d_name);
589
590 ret = perf_event__walk_cgroup_tree(tool, event, path,
591 mount_len, process, machine);
592 if (ret < 0)
593 break;
594
595 path[pos] = '\0';
596 }
597
598 closedir(d);
599 return ret;
600}
601
602int perf_event__synthesize_cgroups(struct perf_tool *tool,
603 perf_event__handler_t process,
604 struct machine *machine)
605{
606 union perf_event event;
607 char cgrp_root[PATH_MAX];
608 size_t mount_len;
609
610 if (!tool || !tool->cgroup_events)
611 return 0;
612
613 if (cgroupfs_find_mountpoint(cgrp_root, PATH_MAX, "perf_event") < 0) {
614 pr_debug("cannot find cgroup mount point\n");
615 return -1;
616 }
617
618 mount_len = strlen(cgrp_root);
619
620 strcat(cgrp_root, "/");
621
622 if (perf_event__walk_cgroup_tree(tool, &event, cgrp_root, mount_len,
623 process, machine) < 0)
624 return -1;
625
626 return 0;
627}
628#else
629int perf_event__synthesize_cgroups(struct perf_tool *tool __maybe_unused,
630 perf_event__handler_t process __maybe_unused,
631 struct machine *machine __maybe_unused)
632{
633 return -1;
634}
635#endif
636
637int perf_event__synthesize_modules(struct perf_tool *tool, perf_event__handler_t process,
638 struct machine *machine)
639{
640 int rc = 0;
641 struct map *pos;
642 struct maps *maps = machine__kernel_maps(machine);
643 union perf_event *event;
644 size_t size = symbol_conf.buildid_mmap2 ?
645 sizeof(event->mmap2) : sizeof(event->mmap);
646
647 event = zalloc(size + machine->id_hdr_size);
648 if (event == NULL) {
649 pr_debug("Not enough memory synthesizing mmap event "
650 "for kernel modules\n");
651 return -1;
652 }
653
654
655
656
657
658 if (machine__is_host(machine))
659 event->header.misc = PERF_RECORD_MISC_KERNEL;
660 else
661 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
662
663 maps__for_each_entry(maps, pos) {
664 if (!__map__is_kmodule(pos))
665 continue;
666
667 if (symbol_conf.buildid_mmap2) {
668 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
669 event->mmap2.header.type = PERF_RECORD_MMAP2;
670 event->mmap2.header.size = (sizeof(event->mmap2) -
671 (sizeof(event->mmap2.filename) - size));
672 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
673 event->mmap2.header.size += machine->id_hdr_size;
674 event->mmap2.start = pos->start;
675 event->mmap2.len = pos->end - pos->start;
676 event->mmap2.pid = machine->pid;
677
678 memcpy(event->mmap2.filename, pos->dso->long_name,
679 pos->dso->long_name_len + 1);
680
681 perf_record_mmap2__read_build_id(&event->mmap2, false);
682 } else {
683 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
684 event->mmap.header.type = PERF_RECORD_MMAP;
685 event->mmap.header.size = (sizeof(event->mmap) -
686 (sizeof(event->mmap.filename) - size));
687 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
688 event->mmap.header.size += machine->id_hdr_size;
689 event->mmap.start = pos->start;
690 event->mmap.len = pos->end - pos->start;
691 event->mmap.pid = machine->pid;
692
693 memcpy(event->mmap.filename, pos->dso->long_name,
694 pos->dso->long_name_len + 1);
695 }
696
697 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
698 rc = -1;
699 break;
700 }
701 }
702
703 free(event);
704 return rc;
705}
706
707static int filter_task(const struct dirent *dirent)
708{
709 return isdigit(dirent->d_name[0]);
710}
711
712static int __event__synthesize_thread(union perf_event *comm_event,
713 union perf_event *mmap_event,
714 union perf_event *fork_event,
715 union perf_event *namespaces_event,
716 pid_t pid, int full, perf_event__handler_t process,
717 struct perf_tool *tool, struct machine *machine, bool mmap_data)
718{
719 char filename[PATH_MAX];
720 struct dirent **dirent;
721 pid_t tgid, ppid;
722 int rc = 0;
723 int i, n;
724
725
726 if (!full) {
727 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
728 process, machine);
729
730 if (tgid == -1)
731 return -1;
732
733 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
734 tgid, process, machine) < 0)
735 return -1;
736
737
738
739
740
741 if (pid == tgid &&
742 perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
743 process, machine, mmap_data))
744 return -1;
745
746 return 0;
747 }
748
749 if (machine__is_default_guest(machine))
750 return 0;
751
752 snprintf(filename, sizeof(filename), "%s/proc/%d/task",
753 machine->root_dir, pid);
754
755 n = scandir(filename, &dirent, filter_task, alphasort);
756 if (n < 0)
757 return n;
758
759 for (i = 0; i < n; i++) {
760 char *end;
761 pid_t _pid;
762 bool kernel_thread = false;
763
764 _pid = strtol(dirent[i]->d_name, &end, 10);
765 if (*end)
766 continue;
767
768 rc = -1;
769 if (perf_event__prepare_comm(comm_event, pid, _pid, machine,
770 &tgid, &ppid, &kernel_thread) != 0)
771 break;
772
773 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
774 ppid, process, machine) < 0)
775 break;
776
777 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
778 tgid, process, machine) < 0)
779 break;
780
781
782
783
784 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
785 break;
786
787 rc = 0;
788 if (_pid == pid && !kernel_thread) {
789
790 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
791 process, machine, mmap_data);
792 if (rc)
793 break;
794 }
795 }
796
797 for (i = 0; i < n; i++)
798 zfree(&dirent[i]);
799 free(dirent);
800
801 return rc;
802}
803
804int perf_event__synthesize_thread_map(struct perf_tool *tool,
805 struct perf_thread_map *threads,
806 perf_event__handler_t process,
807 struct machine *machine,
808 bool mmap_data)
809{
810 union perf_event *comm_event, *mmap_event, *fork_event;
811 union perf_event *namespaces_event;
812 int err = -1, thread, j;
813
814 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
815 if (comm_event == NULL)
816 goto out;
817
818 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
819 if (mmap_event == NULL)
820 goto out_free_comm;
821
822 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
823 if (fork_event == NULL)
824 goto out_free_mmap;
825
826 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
827 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
828 machine->id_hdr_size);
829 if (namespaces_event == NULL)
830 goto out_free_fork;
831
832 err = 0;
833 for (thread = 0; thread < threads->nr; ++thread) {
834 if (__event__synthesize_thread(comm_event, mmap_event,
835 fork_event, namespaces_event,
836 perf_thread_map__pid(threads, thread), 0,
837 process, tool, machine,
838 mmap_data)) {
839 err = -1;
840 break;
841 }
842
843
844
845
846
847 if ((int) comm_event->comm.pid != perf_thread_map__pid(threads, thread)) {
848 bool need_leader = true;
849
850
851 for (j = 0; j < threads->nr; ++j) {
852 if ((int) comm_event->comm.pid == perf_thread_map__pid(threads, j)) {
853 need_leader = false;
854 break;
855 }
856 }
857
858
859 if (need_leader &&
860 __event__synthesize_thread(comm_event, mmap_event,
861 fork_event, namespaces_event,
862 comm_event->comm.pid, 0,
863 process, tool, machine,
864 mmap_data)) {
865 err = -1;
866 break;
867 }
868 }
869 }
870 free(namespaces_event);
871out_free_fork:
872 free(fork_event);
873out_free_mmap:
874 free(mmap_event);
875out_free_comm:
876 free(comm_event);
877out:
878 return err;
879}
880
881static int __perf_event__synthesize_threads(struct perf_tool *tool,
882 perf_event__handler_t process,
883 struct machine *machine,
884 bool mmap_data,
885 struct dirent **dirent,
886 int start,
887 int num)
888{
889 union perf_event *comm_event, *mmap_event, *fork_event;
890 union perf_event *namespaces_event;
891 int err = -1;
892 char *end;
893 pid_t pid;
894 int i;
895
896 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
897 if (comm_event == NULL)
898 goto out;
899
900 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
901 if (mmap_event == NULL)
902 goto out_free_comm;
903
904 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
905 if (fork_event == NULL)
906 goto out_free_mmap;
907
908 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
909 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
910 machine->id_hdr_size);
911 if (namespaces_event == NULL)
912 goto out_free_fork;
913
914 for (i = start; i < start + num; i++) {
915 if (!isdigit(dirent[i]->d_name[0]))
916 continue;
917
918 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
919
920 if (*end)
921 continue;
922
923
924
925
926 __event__synthesize_thread(comm_event, mmap_event, fork_event,
927 namespaces_event, pid, 1, process,
928 tool, machine, mmap_data);
929 }
930 err = 0;
931
932 free(namespaces_event);
933out_free_fork:
934 free(fork_event);
935out_free_mmap:
936 free(mmap_event);
937out_free_comm:
938 free(comm_event);
939out:
940 return err;
941}
942
943struct synthesize_threads_arg {
944 struct perf_tool *tool;
945 perf_event__handler_t process;
946 struct machine *machine;
947 bool mmap_data;
948 struct dirent **dirent;
949 int num;
950 int start;
951};
952
953static void *synthesize_threads_worker(void *arg)
954{
955 struct synthesize_threads_arg *args = arg;
956
957 __perf_event__synthesize_threads(args->tool, args->process,
958 args->machine, args->mmap_data,
959 args->dirent,
960 args->start, args->num);
961 return NULL;
962}
963
964int perf_event__synthesize_threads(struct perf_tool *tool,
965 perf_event__handler_t process,
966 struct machine *machine,
967 bool mmap_data,
968 unsigned int nr_threads_synthesize)
969{
970 struct synthesize_threads_arg *args = NULL;
971 pthread_t *synthesize_threads = NULL;
972 char proc_path[PATH_MAX];
973 struct dirent **dirent;
974 int num_per_thread;
975 int m, n, i, j;
976 int thread_nr;
977 int base = 0;
978 int err = -1;
979
980
981 if (machine__is_default_guest(machine))
982 return 0;
983
984 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
985 n = scandir(proc_path, &dirent, filter_task, alphasort);
986 if (n < 0)
987 return err;
988
989 if (nr_threads_synthesize == UINT_MAX)
990 thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
991 else
992 thread_nr = nr_threads_synthesize;
993
994 if (thread_nr <= 1) {
995 err = __perf_event__synthesize_threads(tool, process,
996 machine, mmap_data,
997 dirent, base, n);
998 goto free_dirent;
999 }
1000 if (thread_nr > n)
1001 thread_nr = n;
1002
1003 synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
1004 if (synthesize_threads == NULL)
1005 goto free_dirent;
1006
1007 args = calloc(sizeof(*args), thread_nr);
1008 if (args == NULL)
1009 goto free_threads;
1010
1011 num_per_thread = n / thread_nr;
1012 m = n % thread_nr;
1013 for (i = 0; i < thread_nr; i++) {
1014 args[i].tool = tool;
1015 args[i].process = process;
1016 args[i].machine = machine;
1017 args[i].mmap_data = mmap_data;
1018 args[i].dirent = dirent;
1019 }
1020 for (i = 0; i < m; i++) {
1021 args[i].num = num_per_thread + 1;
1022 args[i].start = i * args[i].num;
1023 }
1024 if (i != 0)
1025 base = args[i-1].start + args[i-1].num;
1026 for (j = i; j < thread_nr; j++) {
1027 args[j].num = num_per_thread;
1028 args[j].start = base + (j - i) * args[i].num;
1029 }
1030
1031 for (i = 0; i < thread_nr; i++) {
1032 if (pthread_create(&synthesize_threads[i], NULL,
1033 synthesize_threads_worker, &args[i]))
1034 goto out_join;
1035 }
1036 err = 0;
1037out_join:
1038 for (i = 0; i < thread_nr; i++)
1039 pthread_join(synthesize_threads[i], NULL);
1040 free(args);
1041free_threads:
1042 free(synthesize_threads);
1043free_dirent:
1044 for (i = 0; i < n; i++)
1045 zfree(&dirent[i]);
1046 free(dirent);
1047
1048 return err;
1049}
1050
1051int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused,
1052 perf_event__handler_t process __maybe_unused,
1053 struct machine *machine __maybe_unused)
1054{
1055 return 0;
1056}
1057
1058static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
1059 perf_event__handler_t process,
1060 struct machine *machine)
1061{
1062 union perf_event *event;
1063 size_t size = symbol_conf.buildid_mmap2 ?
1064 sizeof(event->mmap2) : sizeof(event->mmap);
1065 struct map *map = machine__kernel_map(machine);
1066 struct kmap *kmap;
1067 int err;
1068
1069 if (map == NULL)
1070 return -1;
1071
1072 kmap = map__kmap(map);
1073 if (!kmap->ref_reloc_sym)
1074 return -1;
1075
1076
1077
1078
1079
1080
1081 event = zalloc(size + machine->id_hdr_size);
1082 if (event == NULL) {
1083 pr_debug("Not enough memory synthesizing mmap event "
1084 "for kernel modules\n");
1085 return -1;
1086 }
1087
1088 if (machine__is_host(machine)) {
1089
1090
1091
1092
1093 event->header.misc = PERF_RECORD_MISC_KERNEL;
1094 } else {
1095 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
1096 }
1097
1098 if (symbol_conf.buildid_mmap2) {
1099 size = snprintf(event->mmap2.filename, sizeof(event->mmap2.filename),
1100 "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
1101 size = PERF_ALIGN(size, sizeof(u64));
1102 event->mmap2.header.type = PERF_RECORD_MMAP2;
1103 event->mmap2.header.size = (sizeof(event->mmap2) -
1104 (sizeof(event->mmap2.filename) - size) + machine->id_hdr_size);
1105 event->mmap2.pgoff = kmap->ref_reloc_sym->addr;
1106 event->mmap2.start = map->start;
1107 event->mmap2.len = map->end - event->mmap.start;
1108 event->mmap2.pid = machine->pid;
1109
1110 perf_record_mmap2__read_build_id(&event->mmap2, true);
1111 } else {
1112 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
1113 "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
1114 size = PERF_ALIGN(size, sizeof(u64));
1115 event->mmap.header.type = PERF_RECORD_MMAP;
1116 event->mmap.header.size = (sizeof(event->mmap) -
1117 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
1118 event->mmap.pgoff = kmap->ref_reloc_sym->addr;
1119 event->mmap.start = map->start;
1120 event->mmap.len = map->end - event->mmap.start;
1121 event->mmap.pid = machine->pid;
1122 }
1123
1124 err = perf_tool__process_synth_event(tool, event, machine, process);
1125 free(event);
1126
1127 return err;
1128}
1129
1130int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
1131 perf_event__handler_t process,
1132 struct machine *machine)
1133{
1134 int err;
1135
1136 err = __perf_event__synthesize_kernel_mmap(tool, process, machine);
1137 if (err < 0)
1138 return err;
1139
1140 return perf_event__synthesize_extra_kmaps(tool, process, machine);
1141}
1142
1143int perf_event__synthesize_thread_map2(struct perf_tool *tool,
1144 struct perf_thread_map *threads,
1145 perf_event__handler_t process,
1146 struct machine *machine)
1147{
1148 union perf_event *event;
1149 int i, err, size;
1150
1151 size = sizeof(event->thread_map);
1152 size += threads->nr * sizeof(event->thread_map.entries[0]);
1153
1154 event = zalloc(size);
1155 if (!event)
1156 return -ENOMEM;
1157
1158 event->header.type = PERF_RECORD_THREAD_MAP;
1159 event->header.size = size;
1160 event->thread_map.nr = threads->nr;
1161
1162 for (i = 0; i < threads->nr; i++) {
1163 struct perf_record_thread_map_entry *entry = &event->thread_map.entries[i];
1164 char *comm = perf_thread_map__comm(threads, i);
1165
1166 if (!comm)
1167 comm = (char *) "";
1168
1169 entry->pid = perf_thread_map__pid(threads, i);
1170 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
1171 }
1172
1173 err = process(tool, event, NULL, machine);
1174
1175 free(event);
1176 return err;
1177}
1178
1179static void synthesize_cpus(struct cpu_map_entries *cpus,
1180 struct perf_cpu_map *map)
1181{
1182 int i;
1183
1184 cpus->nr = map->nr;
1185
1186 for (i = 0; i < map->nr; i++)
1187 cpus->cpu[i] = map->map[i];
1188}
1189
1190static void synthesize_mask(struct perf_record_record_cpu_map *mask,
1191 struct perf_cpu_map *map, int max)
1192{
1193 int i;
1194
1195 mask->nr = BITS_TO_LONGS(max);
1196 mask->long_size = sizeof(long);
1197
1198 for (i = 0; i < map->nr; i++)
1199 set_bit(map->map[i], mask->mask);
1200}
1201
1202static size_t cpus_size(struct perf_cpu_map *map)
1203{
1204 return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
1205}
1206
1207static size_t mask_size(struct perf_cpu_map *map, int *max)
1208{
1209 int i;
1210
1211 *max = 0;
1212
1213 for (i = 0; i < map->nr; i++) {
1214
1215 int bit = map->map[i] + 1;
1216
1217 if (bit > *max)
1218 *max = bit;
1219 }
1220
1221 return sizeof(struct perf_record_record_cpu_map) + BITS_TO_LONGS(*max) * sizeof(long);
1222}
1223
1224void *cpu_map_data__alloc(struct perf_cpu_map *map, size_t *size, u16 *type, int *max)
1225{
1226 size_t size_cpus, size_mask;
1227 bool is_dummy = perf_cpu_map__empty(map);
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242 size_cpus = cpus_size(map);
1243 size_mask = mask_size(map, max);
1244
1245 if (is_dummy || (size_cpus < size_mask)) {
1246 *size += size_cpus;
1247 *type = PERF_CPU_MAP__CPUS;
1248 } else {
1249 *size += size_mask;
1250 *type = PERF_CPU_MAP__MASK;
1251 }
1252
1253 *size += sizeof(struct perf_record_cpu_map_data);
1254 *size = PERF_ALIGN(*size, sizeof(u64));
1255 return zalloc(*size);
1256}
1257
1258void cpu_map_data__synthesize(struct perf_record_cpu_map_data *data, struct perf_cpu_map *map,
1259 u16 type, int max)
1260{
1261 data->type = type;
1262
1263 switch (type) {
1264 case PERF_CPU_MAP__CPUS:
1265 synthesize_cpus((struct cpu_map_entries *) data->data, map);
1266 break;
1267 case PERF_CPU_MAP__MASK:
1268 synthesize_mask((struct perf_record_record_cpu_map *)data->data, map, max);
1269 default:
1270 break;
1271 }
1272}
1273
1274static struct perf_record_cpu_map *cpu_map_event__new(struct perf_cpu_map *map)
1275{
1276 size_t size = sizeof(struct perf_record_cpu_map);
1277 struct perf_record_cpu_map *event;
1278 int max;
1279 u16 type;
1280
1281 event = cpu_map_data__alloc(map, &size, &type, &max);
1282 if (!event)
1283 return NULL;
1284
1285 event->header.type = PERF_RECORD_CPU_MAP;
1286 event->header.size = size;
1287 event->data.type = type;
1288
1289 cpu_map_data__synthesize(&event->data, map, type, max);
1290 return event;
1291}
1292
1293int perf_event__synthesize_cpu_map(struct perf_tool *tool,
1294 struct perf_cpu_map *map,
1295 perf_event__handler_t process,
1296 struct machine *machine)
1297{
1298 struct perf_record_cpu_map *event;
1299 int err;
1300
1301 event = cpu_map_event__new(map);
1302 if (!event)
1303 return -ENOMEM;
1304
1305 err = process(tool, (union perf_event *) event, NULL, machine);
1306
1307 free(event);
1308 return err;
1309}
1310
1311int perf_event__synthesize_stat_config(struct perf_tool *tool,
1312 struct perf_stat_config *config,
1313 perf_event__handler_t process,
1314 struct machine *machine)
1315{
1316 struct perf_record_stat_config *event;
1317 int size, i = 0, err;
1318
1319 size = sizeof(*event);
1320 size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
1321
1322 event = zalloc(size);
1323 if (!event)
1324 return -ENOMEM;
1325
1326 event->header.type = PERF_RECORD_STAT_CONFIG;
1327 event->header.size = size;
1328 event->nr = PERF_STAT_CONFIG_TERM__MAX;
1329
1330#define ADD(__term, __val) \
1331 event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \
1332 event->data[i].val = __val; \
1333 i++;
1334
1335 ADD(AGGR_MODE, config->aggr_mode)
1336 ADD(INTERVAL, config->interval)
1337 ADD(SCALE, config->scale)
1338
1339 WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
1340 "stat config terms unbalanced\n");
1341#undef ADD
1342
1343 err = process(tool, (union perf_event *) event, NULL, machine);
1344
1345 free(event);
1346 return err;
1347}
1348
1349int perf_event__synthesize_stat(struct perf_tool *tool,
1350 u32 cpu, u32 thread, u64 id,
1351 struct perf_counts_values *count,
1352 perf_event__handler_t process,
1353 struct machine *machine)
1354{
1355 struct perf_record_stat event;
1356
1357 event.header.type = PERF_RECORD_STAT;
1358 event.header.size = sizeof(event);
1359 event.header.misc = 0;
1360
1361 event.id = id;
1362 event.cpu = cpu;
1363 event.thread = thread;
1364 event.val = count->val;
1365 event.ena = count->ena;
1366 event.run = count->run;
1367
1368 return process(tool, (union perf_event *) &event, NULL, machine);
1369}
1370
1371int perf_event__synthesize_stat_round(struct perf_tool *tool,
1372 u64 evtime, u64 type,
1373 perf_event__handler_t process,
1374 struct machine *machine)
1375{
1376 struct perf_record_stat_round event;
1377
1378 event.header.type = PERF_RECORD_STAT_ROUND;
1379 event.header.size = sizeof(event);
1380 event.header.misc = 0;
1381
1382 event.time = evtime;
1383 event.type = type;
1384
1385 return process(tool, (union perf_event *) &event, NULL, machine);
1386}
1387
1388size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type, u64 read_format)
1389{
1390 size_t sz, result = sizeof(struct perf_record_sample);
1391
1392 if (type & PERF_SAMPLE_IDENTIFIER)
1393 result += sizeof(u64);
1394
1395 if (type & PERF_SAMPLE_IP)
1396 result += sizeof(u64);
1397
1398 if (type & PERF_SAMPLE_TID)
1399 result += sizeof(u64);
1400
1401 if (type & PERF_SAMPLE_TIME)
1402 result += sizeof(u64);
1403
1404 if (type & PERF_SAMPLE_ADDR)
1405 result += sizeof(u64);
1406
1407 if (type & PERF_SAMPLE_ID)
1408 result += sizeof(u64);
1409
1410 if (type & PERF_SAMPLE_STREAM_ID)
1411 result += sizeof(u64);
1412
1413 if (type & PERF_SAMPLE_CPU)
1414 result += sizeof(u64);
1415
1416 if (type & PERF_SAMPLE_PERIOD)
1417 result += sizeof(u64);
1418
1419 if (type & PERF_SAMPLE_READ) {
1420 result += sizeof(u64);
1421 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1422 result += sizeof(u64);
1423 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1424 result += sizeof(u64);
1425
1426 if (read_format & PERF_FORMAT_GROUP) {
1427 sz = sample->read.group.nr *
1428 sizeof(struct sample_read_value);
1429 result += sz;
1430 } else {
1431 result += sizeof(u64);
1432 }
1433 }
1434
1435 if (type & PERF_SAMPLE_CALLCHAIN) {
1436 sz = (sample->callchain->nr + 1) * sizeof(u64);
1437 result += sz;
1438 }
1439
1440 if (type & PERF_SAMPLE_RAW) {
1441 result += sizeof(u32);
1442 result += sample->raw_size;
1443 }
1444
1445 if (type & PERF_SAMPLE_BRANCH_STACK) {
1446 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
1447
1448 sz += 2 * sizeof(u64);
1449 result += sz;
1450 }
1451
1452 if (type & PERF_SAMPLE_REGS_USER) {
1453 if (sample->user_regs.abi) {
1454 result += sizeof(u64);
1455 sz = hweight64(sample->user_regs.mask) * sizeof(u64);
1456 result += sz;
1457 } else {
1458 result += sizeof(u64);
1459 }
1460 }
1461
1462 if (type & PERF_SAMPLE_STACK_USER) {
1463 sz = sample->user_stack.size;
1464 result += sizeof(u64);
1465 if (sz) {
1466 result += sz;
1467 result += sizeof(u64);
1468 }
1469 }
1470
1471 if (type & PERF_SAMPLE_WEIGHT_TYPE)
1472 result += sizeof(u64);
1473
1474 if (type & PERF_SAMPLE_DATA_SRC)
1475 result += sizeof(u64);
1476
1477 if (type & PERF_SAMPLE_TRANSACTION)
1478 result += sizeof(u64);
1479
1480 if (type & PERF_SAMPLE_REGS_INTR) {
1481 if (sample->intr_regs.abi) {
1482 result += sizeof(u64);
1483 sz = hweight64(sample->intr_regs.mask) * sizeof(u64);
1484 result += sz;
1485 } else {
1486 result += sizeof(u64);
1487 }
1488 }
1489
1490 if (type & PERF_SAMPLE_PHYS_ADDR)
1491 result += sizeof(u64);
1492
1493 if (type & PERF_SAMPLE_CGROUP)
1494 result += sizeof(u64);
1495
1496 if (type & PERF_SAMPLE_DATA_PAGE_SIZE)
1497 result += sizeof(u64);
1498
1499 if (type & PERF_SAMPLE_CODE_PAGE_SIZE)
1500 result += sizeof(u64);
1501
1502 if (type & PERF_SAMPLE_AUX) {
1503 result += sizeof(u64);
1504 result += sample->aux_sample.size;
1505 }
1506
1507 return result;
1508}
1509
1510void __weak arch_perf_synthesize_sample_weight(const struct perf_sample *data,
1511 __u64 *array, u64 type __maybe_unused)
1512{
1513 *array = data->weight;
1514}
1515
1516int perf_event__synthesize_sample(union perf_event *event, u64 type, u64 read_format,
1517 const struct perf_sample *sample)
1518{
1519 __u64 *array;
1520 size_t sz;
1521
1522
1523
1524
1525 union u64_swap u;
1526
1527 array = event->sample.array;
1528
1529 if (type & PERF_SAMPLE_IDENTIFIER) {
1530 *array = sample->id;
1531 array++;
1532 }
1533
1534 if (type & PERF_SAMPLE_IP) {
1535 *array = sample->ip;
1536 array++;
1537 }
1538
1539 if (type & PERF_SAMPLE_TID) {
1540 u.val32[0] = sample->pid;
1541 u.val32[1] = sample->tid;
1542 *array = u.val64;
1543 array++;
1544 }
1545
1546 if (type & PERF_SAMPLE_TIME) {
1547 *array = sample->time;
1548 array++;
1549 }
1550
1551 if (type & PERF_SAMPLE_ADDR) {
1552 *array = sample->addr;
1553 array++;
1554 }
1555
1556 if (type & PERF_SAMPLE_ID) {
1557 *array = sample->id;
1558 array++;
1559 }
1560
1561 if (type & PERF_SAMPLE_STREAM_ID) {
1562 *array = sample->stream_id;
1563 array++;
1564 }
1565
1566 if (type & PERF_SAMPLE_CPU) {
1567 u.val32[0] = sample->cpu;
1568 u.val32[1] = 0;
1569 *array = u.val64;
1570 array++;
1571 }
1572
1573 if (type & PERF_SAMPLE_PERIOD) {
1574 *array = sample->period;
1575 array++;
1576 }
1577
1578 if (type & PERF_SAMPLE_READ) {
1579 if (read_format & PERF_FORMAT_GROUP)
1580 *array = sample->read.group.nr;
1581 else
1582 *array = sample->read.one.value;
1583 array++;
1584
1585 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
1586 *array = sample->read.time_enabled;
1587 array++;
1588 }
1589
1590 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
1591 *array = sample->read.time_running;
1592 array++;
1593 }
1594
1595
1596 if (read_format & PERF_FORMAT_GROUP) {
1597 sz = sample->read.group.nr *
1598 sizeof(struct sample_read_value);
1599 memcpy(array, sample->read.group.values, sz);
1600 array = (void *)array + sz;
1601 } else {
1602 *array = sample->read.one.id;
1603 array++;
1604 }
1605 }
1606
1607 if (type & PERF_SAMPLE_CALLCHAIN) {
1608 sz = (sample->callchain->nr + 1) * sizeof(u64);
1609 memcpy(array, sample->callchain, sz);
1610 array = (void *)array + sz;
1611 }
1612
1613 if (type & PERF_SAMPLE_RAW) {
1614 u.val32[0] = sample->raw_size;
1615 *array = u.val64;
1616 array = (void *)array + sizeof(u32);
1617
1618 memcpy(array, sample->raw_data, sample->raw_size);
1619 array = (void *)array + sample->raw_size;
1620 }
1621
1622 if (type & PERF_SAMPLE_BRANCH_STACK) {
1623 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
1624
1625 sz += 2 * sizeof(u64);
1626 memcpy(array, sample->branch_stack, sz);
1627 array = (void *)array + sz;
1628 }
1629
1630 if (type & PERF_SAMPLE_REGS_USER) {
1631 if (sample->user_regs.abi) {
1632 *array++ = sample->user_regs.abi;
1633 sz = hweight64(sample->user_regs.mask) * sizeof(u64);
1634 memcpy(array, sample->user_regs.regs, sz);
1635 array = (void *)array + sz;
1636 } else {
1637 *array++ = 0;
1638 }
1639 }
1640
1641 if (type & PERF_SAMPLE_STACK_USER) {
1642 sz = sample->user_stack.size;
1643 *array++ = sz;
1644 if (sz) {
1645 memcpy(array, sample->user_stack.data, sz);
1646 array = (void *)array + sz;
1647 *array++ = sz;
1648 }
1649 }
1650
1651 if (type & PERF_SAMPLE_WEIGHT_TYPE) {
1652 arch_perf_synthesize_sample_weight(sample, array, type);
1653 array++;
1654 }
1655
1656 if (type & PERF_SAMPLE_DATA_SRC) {
1657 *array = sample->data_src;
1658 array++;
1659 }
1660
1661 if (type & PERF_SAMPLE_TRANSACTION) {
1662 *array = sample->transaction;
1663 array++;
1664 }
1665
1666 if (type & PERF_SAMPLE_REGS_INTR) {
1667 if (sample->intr_regs.abi) {
1668 *array++ = sample->intr_regs.abi;
1669 sz = hweight64(sample->intr_regs.mask) * sizeof(u64);
1670 memcpy(array, sample->intr_regs.regs, sz);
1671 array = (void *)array + sz;
1672 } else {
1673 *array++ = 0;
1674 }
1675 }
1676
1677 if (type & PERF_SAMPLE_PHYS_ADDR) {
1678 *array = sample->phys_addr;
1679 array++;
1680 }
1681
1682 if (type & PERF_SAMPLE_CGROUP) {
1683 *array = sample->cgroup;
1684 array++;
1685 }
1686
1687 if (type & PERF_SAMPLE_DATA_PAGE_SIZE) {
1688 *array = sample->data_page_size;
1689 array++;
1690 }
1691
1692 if (type & PERF_SAMPLE_CODE_PAGE_SIZE) {
1693 *array = sample->code_page_size;
1694 array++;
1695 }
1696
1697 if (type & PERF_SAMPLE_AUX) {
1698 sz = sample->aux_sample.size;
1699 *array++ = sz;
1700 memcpy(array, sample->aux_sample.data, sz);
1701 array = (void *)array + sz;
1702 }
1703
1704 return 0;
1705}
1706
1707int perf_event__synthesize_id_index(struct perf_tool *tool, perf_event__handler_t process,
1708 struct evlist *evlist, struct machine *machine)
1709{
1710 union perf_event *ev;
1711 struct evsel *evsel;
1712 size_t nr = 0, i = 0, sz, max_nr, n;
1713 int err;
1714
1715 pr_debug2("Synthesizing id index\n");
1716
1717 max_nr = (UINT16_MAX - sizeof(struct perf_record_id_index)) /
1718 sizeof(struct id_index_entry);
1719
1720 evlist__for_each_entry(evlist, evsel)
1721 nr += evsel->core.ids;
1722
1723 n = nr > max_nr ? max_nr : nr;
1724 sz = sizeof(struct perf_record_id_index) + n * sizeof(struct id_index_entry);
1725 ev = zalloc(sz);
1726 if (!ev)
1727 return -ENOMEM;
1728
1729 ev->id_index.header.type = PERF_RECORD_ID_INDEX;
1730 ev->id_index.header.size = sz;
1731 ev->id_index.nr = n;
1732
1733 evlist__for_each_entry(evlist, evsel) {
1734 u32 j;
1735
1736 for (j = 0; j < evsel->core.ids; j++) {
1737 struct id_index_entry *e;
1738 struct perf_sample_id *sid;
1739
1740 if (i >= n) {
1741 err = process(tool, ev, NULL, machine);
1742 if (err)
1743 goto out_err;
1744 nr -= n;
1745 i = 0;
1746 }
1747
1748 e = &ev->id_index.entries[i++];
1749
1750 e->id = evsel->core.id[j];
1751
1752 sid = evlist__id2sid(evlist, e->id);
1753 if (!sid) {
1754 free(ev);
1755 return -ENOENT;
1756 }
1757
1758 e->idx = sid->idx;
1759 e->cpu = sid->cpu;
1760 e->tid = sid->tid;
1761 }
1762 }
1763
1764 sz = sizeof(struct perf_record_id_index) + nr * sizeof(struct id_index_entry);
1765 ev->id_index.header.size = sz;
1766 ev->id_index.nr = nr;
1767
1768 err = process(tool, ev, NULL, machine);
1769out_err:
1770 free(ev);
1771
1772 return err;
1773}
1774
1775int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
1776 struct target *target, struct perf_thread_map *threads,
1777 perf_event__handler_t process, bool data_mmap,
1778 unsigned int nr_threads_synthesize)
1779{
1780 if (target__has_task(target))
1781 return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap);
1782 else if (target__has_cpu(target))
1783 return perf_event__synthesize_threads(tool, process,
1784 machine, data_mmap,
1785 nr_threads_synthesize);
1786
1787 return 0;
1788}
1789
1790int machine__synthesize_threads(struct machine *machine, struct target *target,
1791 struct perf_thread_map *threads, bool data_mmap,
1792 unsigned int nr_threads_synthesize)
1793{
1794 return __machine__synthesize_threads(machine, NULL, target, threads,
1795 perf_event__process, data_mmap,
1796 nr_threads_synthesize);
1797}
1798
1799static struct perf_record_event_update *event_update_event__new(size_t size, u64 type, u64 id)
1800{
1801 struct perf_record_event_update *ev;
1802
1803 size += sizeof(*ev);
1804 size = PERF_ALIGN(size, sizeof(u64));
1805
1806 ev = zalloc(size);
1807 if (ev) {
1808 ev->header.type = PERF_RECORD_EVENT_UPDATE;
1809 ev->header.size = (u16)size;
1810 ev->type = type;
1811 ev->id = id;
1812 }
1813 return ev;
1814}
1815
1816int perf_event__synthesize_event_update_unit(struct perf_tool *tool, struct evsel *evsel,
1817 perf_event__handler_t process)
1818{
1819 size_t size = strlen(evsel->unit);
1820 struct perf_record_event_update *ev;
1821 int err;
1822
1823 ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->core.id[0]);
1824 if (ev == NULL)
1825 return -ENOMEM;
1826
1827 strlcpy(ev->data, evsel->unit, size + 1);
1828 err = process(tool, (union perf_event *)ev, NULL, NULL);
1829 free(ev);
1830 return err;
1831}
1832
1833int perf_event__synthesize_event_update_scale(struct perf_tool *tool, struct evsel *evsel,
1834 perf_event__handler_t process)
1835{
1836 struct perf_record_event_update *ev;
1837 struct perf_record_event_update_scale *ev_data;
1838 int err;
1839
1840 ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->core.id[0]);
1841 if (ev == NULL)
1842 return -ENOMEM;
1843
1844 ev_data = (struct perf_record_event_update_scale *)ev->data;
1845 ev_data->scale = evsel->scale;
1846 err = process(tool, (union perf_event *)ev, NULL, NULL);
1847 free(ev);
1848 return err;
1849}
1850
1851int perf_event__synthesize_event_update_name(struct perf_tool *tool, struct evsel *evsel,
1852 perf_event__handler_t process)
1853{
1854 struct perf_record_event_update *ev;
1855 size_t len = strlen(evsel->name);
1856 int err;
1857
1858 ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->core.id[0]);
1859 if (ev == NULL)
1860 return -ENOMEM;
1861
1862 strlcpy(ev->data, evsel->name, len + 1);
1863 err = process(tool, (union perf_event *)ev, NULL, NULL);
1864 free(ev);
1865 return err;
1866}
1867
1868int perf_event__synthesize_event_update_cpus(struct perf_tool *tool, struct evsel *evsel,
1869 perf_event__handler_t process)
1870{
1871 size_t size = sizeof(struct perf_record_event_update);
1872 struct perf_record_event_update *ev;
1873 int max, err;
1874 u16 type;
1875
1876 if (!evsel->core.own_cpus)
1877 return 0;
1878
1879 ev = cpu_map_data__alloc(evsel->core.own_cpus, &size, &type, &max);
1880 if (!ev)
1881 return -ENOMEM;
1882
1883 ev->header.type = PERF_RECORD_EVENT_UPDATE;
1884 ev->header.size = (u16)size;
1885 ev->type = PERF_EVENT_UPDATE__CPUS;
1886 ev->id = evsel->core.id[0];
1887
1888 cpu_map_data__synthesize((struct perf_record_cpu_map_data *)ev->data,
1889 evsel->core.own_cpus, type, max);
1890
1891 err = process(tool, (union perf_event *)ev, NULL, NULL);
1892 free(ev);
1893 return err;
1894}
1895
1896int perf_event__synthesize_attrs(struct perf_tool *tool, struct evlist *evlist,
1897 perf_event__handler_t process)
1898{
1899 struct evsel *evsel;
1900 int err = 0;
1901
1902 evlist__for_each_entry(evlist, evsel) {
1903 err = perf_event__synthesize_attr(tool, &evsel->core.attr, evsel->core.ids,
1904 evsel->core.id, process);
1905 if (err) {
1906 pr_debug("failed to create perf header attribute\n");
1907 return err;
1908 }
1909 }
1910
1911 return err;
1912}
1913
1914static bool has_unit(struct evsel *evsel)
1915{
1916 return evsel->unit && *evsel->unit;
1917}
1918
1919static bool has_scale(struct evsel *evsel)
1920{
1921 return evsel->scale != 1;
1922}
1923
1924int perf_event__synthesize_extra_attr(struct perf_tool *tool, struct evlist *evsel_list,
1925 perf_event__handler_t process, bool is_pipe)
1926{
1927 struct evsel *evsel;
1928 int err;
1929
1930
1931
1932
1933
1934 evlist__for_each_entry(evsel_list, evsel) {
1935 if (!evsel->supported)
1936 continue;
1937
1938
1939
1940
1941 if (has_unit(evsel)) {
1942 err = perf_event__synthesize_event_update_unit(tool, evsel, process);
1943 if (err < 0) {
1944 pr_err("Couldn't synthesize evsel unit.\n");
1945 return err;
1946 }
1947 }
1948
1949 if (has_scale(evsel)) {
1950 err = perf_event__synthesize_event_update_scale(tool, evsel, process);
1951 if (err < 0) {
1952 pr_err("Couldn't synthesize evsel evsel.\n");
1953 return err;
1954 }
1955 }
1956
1957 if (evsel->core.own_cpus) {
1958 err = perf_event__synthesize_event_update_cpus(tool, evsel, process);
1959 if (err < 0) {
1960 pr_err("Couldn't synthesize evsel cpus.\n");
1961 return err;
1962 }
1963 }
1964
1965
1966
1967
1968
1969 if (is_pipe) {
1970 err = perf_event__synthesize_event_update_name(tool, evsel, process);
1971 if (err < 0) {
1972 pr_err("Couldn't synthesize evsel name.\n");
1973 return err;
1974 }
1975 }
1976 }
1977 return 0;
1978}
1979
1980int perf_event__synthesize_attr(struct perf_tool *tool, struct perf_event_attr *attr,
1981 u32 ids, u64 *id, perf_event__handler_t process)
1982{
1983 union perf_event *ev;
1984 size_t size;
1985 int err;
1986
1987 size = sizeof(struct perf_event_attr);
1988 size = PERF_ALIGN(size, sizeof(u64));
1989 size += sizeof(struct perf_event_header);
1990 size += ids * sizeof(u64);
1991
1992 ev = zalloc(size);
1993
1994 if (ev == NULL)
1995 return -ENOMEM;
1996
1997 ev->attr.attr = *attr;
1998 memcpy(ev->attr.id, id, ids * sizeof(u64));
1999
2000 ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
2001 ev->attr.header.size = (u16)size;
2002
2003 if (ev->attr.header.size == size)
2004 err = process(tool, ev, NULL, NULL);
2005 else
2006 err = -E2BIG;
2007
2008 free(ev);
2009
2010 return err;
2011}
2012
2013int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd, struct evlist *evlist,
2014 perf_event__handler_t process)
2015{
2016 union perf_event ev;
2017 struct tracing_data *tdata;
2018 ssize_t size = 0, aligned_size = 0, padding;
2019 struct feat_fd ff;
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032 tdata = tracing_data_get(&evlist->core.entries, fd, true);
2033 if (!tdata)
2034 return -1;
2035
2036 memset(&ev, 0, sizeof(ev));
2037
2038 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
2039 size = tdata->size;
2040 aligned_size = PERF_ALIGN(size, sizeof(u64));
2041 padding = aligned_size - size;
2042 ev.tracing_data.header.size = sizeof(ev.tracing_data);
2043 ev.tracing_data.size = aligned_size;
2044
2045 process(tool, &ev, NULL, NULL);
2046
2047
2048
2049
2050
2051 tracing_data_put(tdata);
2052
2053 ff = (struct feat_fd){ .fd = fd };
2054 if (write_padded(&ff, NULL, 0, padding))
2055 return -1;
2056
2057 return aligned_size;
2058}
2059
2060int perf_event__synthesize_build_id(struct perf_tool *tool, struct dso *pos, u16 misc,
2061 perf_event__handler_t process, struct machine *machine)
2062{
2063 union perf_event ev;
2064 size_t len;
2065
2066 if (!pos->hit)
2067 return 0;
2068
2069 memset(&ev, 0, sizeof(ev));
2070
2071 len = pos->long_name_len + 1;
2072 len = PERF_ALIGN(len, NAME_ALIGN);
2073 memcpy(&ev.build_id.build_id, pos->bid.data, sizeof(pos->bid.data));
2074 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
2075 ev.build_id.header.misc = misc;
2076 ev.build_id.pid = machine->pid;
2077 ev.build_id.header.size = sizeof(ev.build_id) + len;
2078 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
2079
2080 return process(tool, &ev, NULL, machine);
2081}
2082
2083int perf_event__synthesize_stat_events(struct perf_stat_config *config, struct perf_tool *tool,
2084 struct evlist *evlist, perf_event__handler_t process, bool attrs)
2085{
2086 int err;
2087
2088 if (attrs) {
2089 err = perf_event__synthesize_attrs(tool, evlist, process);
2090 if (err < 0) {
2091 pr_err("Couldn't synthesize attrs.\n");
2092 return err;
2093 }
2094 }
2095
2096 err = perf_event__synthesize_extra_attr(tool, evlist, process, attrs);
2097 err = perf_event__synthesize_thread_map2(tool, evlist->core.threads, process, NULL);
2098 if (err < 0) {
2099 pr_err("Couldn't synthesize thread map.\n");
2100 return err;
2101 }
2102
2103 err = perf_event__synthesize_cpu_map(tool, evlist->core.cpus, process, NULL);
2104 if (err < 0) {
2105 pr_err("Couldn't synthesize thread map.\n");
2106 return err;
2107 }
2108
2109 err = perf_event__synthesize_stat_config(tool, config, process, NULL);
2110 if (err < 0) {
2111 pr_err("Couldn't synthesize config.\n");
2112 return err;
2113 }
2114
2115 return 0;
2116}
2117
2118extern const struct perf_header_feature_ops feat_ops[HEADER_LAST_FEATURE];
2119
2120int perf_event__synthesize_features(struct perf_tool *tool, struct perf_session *session,
2121 struct evlist *evlist, perf_event__handler_t process)
2122{
2123 struct perf_header *header = &session->header;
2124 struct perf_record_header_feature *fe;
2125 struct feat_fd ff;
2126 size_t sz, sz_hdr;
2127 int feat, ret;
2128
2129 sz_hdr = sizeof(fe->header);
2130 sz = sizeof(union perf_event);
2131
2132 sz = PERF_ALIGN(sz, page_size);
2133
2134 memset(&ff, 0, sizeof(ff));
2135
2136 ff.buf = malloc(sz);
2137 if (!ff.buf)
2138 return -ENOMEM;
2139
2140 ff.size = sz - sz_hdr;
2141 ff.ph = &session->header;
2142
2143 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
2144 if (!feat_ops[feat].synthesize) {
2145 pr_debug("No record header feature for header :%d\n", feat);
2146 continue;
2147 }
2148
2149 ff.offset = sizeof(*fe);
2150
2151 ret = feat_ops[feat].write(&ff, evlist);
2152 if (ret || ff.offset <= (ssize_t)sizeof(*fe)) {
2153 pr_debug("Error writing feature\n");
2154 continue;
2155 }
2156
2157 fe = ff.buf;
2158 memset(fe, 0, sizeof(*fe));
2159
2160 fe->feat_id = feat;
2161 fe->header.type = PERF_RECORD_HEADER_FEATURE;
2162 fe->header.size = ff.offset;
2163
2164 ret = process(tool, ff.buf, NULL, NULL);
2165 if (ret) {
2166 free(ff.buf);
2167 return ret;
2168 }
2169 }
2170
2171
2172 fe = ff.buf;
2173 fe->feat_id = HEADER_LAST_FEATURE;
2174 fe->header.type = PERF_RECORD_HEADER_FEATURE;
2175 fe->header.size = sizeof(*fe);
2176
2177 ret = process(tool, ff.buf, NULL, NULL);
2178
2179 free(ff.buf);
2180 return ret;
2181}
2182
