1
2
3#include "util/cgroup.h"
4#include "util/data.h"
5#include "util/debug.h"
6#include "util/dso.h"
7#include "util/event.h"
8#include "util/evlist.h"
9#include "util/machine.h"
10#include "util/map.h"
11#include "util/map_symbol.h"
12#include "util/branch.h"
13#include "util/memswap.h"
14#include "util/namespaces.h"
15#include "util/session.h"
16#include "util/stat.h"
17#include "util/symbol.h"
18#include "util/synthetic-events.h"
19#include "util/target.h"
20#include "util/time-utils.h"
21#include <linux/bitops.h>
22#include <linux/kernel.h>
23#include <linux/string.h>
24#include <linux/zalloc.h>
25#include <linux/perf_event.h>
26#include <asm/bug.h>
27#include <perf/evsel.h>
28#include <perf/cpumap.h>
29#include <internal/lib.h>
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>
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
48unsigned int proc_map_timeout = DEFAULT_PROC_MAP_PARSE_TIMEOUT;
49
50int 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
70
71
72static int perf_event__get_comm_ids(pid_t pid, pid_t tid, char *comm, size_t len,
73 pid_t *tgid, pid_t *ppid, bool *kernel)
74{
75 char bf[4096];
76 int fd;
77 size_t size = 0;
78 ssize_t n;
79 char *name, *tgids, *ppids, *vmpeak, *threads;
80
81 *tgid = -1;
82 *ppid = -1;
83
84 if (pid)
85 snprintf(bf, sizeof(bf), "/proc/%d/task/%d/status", pid, tid);
86 else
87 snprintf(bf, sizeof(bf), "/proc/%d/status", tid);
88
89 fd = open(bf, O_RDONLY);
90 if (fd < 0) {
91 pr_debug("couldn't open %s\n", bf);
92 return -1;
93 }
94
95 n = read(fd, bf, sizeof(bf) - 1);
96 close(fd);
97 if (n <= 0) {
98 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
99 tid);
100 return -1;
101 }
102 bf[n] = '\0';
103
104 name = strstr(bf, "Name:");
105 tgids = strstr(name ?: bf, "Tgid:");
106 ppids = strstr(tgids ?: bf, "PPid:");
107 vmpeak = strstr(ppids ?: bf, "VmPeak:");
108
109 if (vmpeak)
110 threads = NULL;
111 else
112 threads = strstr(ppids ?: bf, "Threads:");
113
114 if (name) {
115 char *nl;
116
117 name = skip_spaces(name + 5);
118 nl = strchr(name, '\n');
119 if (nl)
120 *nl = '\0';
121
122 size = strlen(name);
123 if (size >= len)
124 size = len - 1;
125 memcpy(comm, name, size);
126 comm[size] = '\0';
127 } else {
128 pr_debug("Name: string not found for pid %d\n", tid);
129 }
130
131 if (tgids) {
132 tgids += 5;
133 *tgid = atoi(tgids);
134 } else {
135 pr_debug("Tgid: string not found for pid %d\n", tid);
136 }
137
138 if (ppids) {
139 ppids += 5;
140 *ppid = atoi(ppids);
141 } else {
142 pr_debug("PPid: string not found for pid %d\n", tid);
143 }
144
145 if (!vmpeak && threads)
146 *kernel = true;
147 else
148 *kernel = false;
149
150 return 0;
151}
152
153static int perf_event__prepare_comm(union perf_event *event, pid_t pid, pid_t tid,
154 struct machine *machine,
155 pid_t *tgid, pid_t *ppid, bool *kernel)
156{
157 size_t size;
158
159 *ppid = -1;
160
161 memset(&event->comm, 0, sizeof(event->comm));
162
163 if (machine__is_host(machine)) {
164 if (perf_event__get_comm_ids(pid, tid, event->comm.comm,
165 sizeof(event->comm.comm),
166 tgid, ppid, kernel) != 0) {
167 return -1;
168 }
169 } else {
170 *tgid = machine->pid;
171 }
172
173 if (*tgid < 0)
174 return -1;
175
176 event->comm.pid = *tgid;
177 event->comm.header.type = PERF_RECORD_COMM;
178
179 size = strlen(event->comm.comm) + 1;
180 size = PERF_ALIGN(size, sizeof(u64));
181 memset(event->comm.comm + size, 0, machine->id_hdr_size);
182 event->comm.header.size = (sizeof(event->comm) -
183 (sizeof(event->comm.comm) - size) +
184 machine->id_hdr_size);
185 event->comm.tid = tid;
186
187 return 0;
188}
189
190pid_t perf_event__synthesize_comm(struct perf_tool *tool,
191 union perf_event *event, pid_t pid,
192 perf_event__handler_t process,
193 struct machine *machine)
194{
195 pid_t tgid, ppid;
196 bool kernel_thread;
197
198 if (perf_event__prepare_comm(event, 0, pid, machine, &tgid, &ppid,
199 &kernel_thread) != 0)
200 return -1;
201
202 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
203 return -1;
204
205 return tgid;
206}
207
208static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
209 struct perf_ns_link_info *ns_link_info)
210{
211 struct stat64 st;
212 char proc_ns[128];
213
214 sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
215 if (stat64(proc_ns, &st) == 0) {
216 ns_link_info->dev = st.st_dev;
217 ns_link_info->ino = st.st_ino;
218 }
219}
220
221int perf_event__synthesize_namespaces(struct perf_tool *tool,
222 union perf_event *event,
223 pid_t pid, pid_t tgid,
224 perf_event__handler_t process,
225 struct machine *machine)
226{
227 u32 idx;
228 struct perf_ns_link_info *ns_link_info;
229
230 if (!tool || !tool->namespace_events)
231 return 0;
232
233 memset(&event->namespaces, 0, (sizeof(event->namespaces) +
234 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
235 machine->id_hdr_size));
236
237 event->namespaces.pid = tgid;
238 event->namespaces.tid = pid;
239
240 event->namespaces.nr_namespaces = NR_NAMESPACES;
241
242 ns_link_info = event->namespaces.link_info;
243
244 for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
245 perf_event__get_ns_link_info(pid, perf_ns__name(idx),
246 &ns_link_info[idx]);
247
248 event->namespaces.header.type = PERF_RECORD_NAMESPACES;
249
250 event->namespaces.header.size = (sizeof(event->namespaces) +
251 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
252 machine->id_hdr_size);
253
254 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
255 return -1;
256
257 return 0;
258}
259
260static int perf_event__synthesize_fork(struct perf_tool *tool,
261 union perf_event *event,
262 pid_t pid, pid_t tgid, pid_t ppid,
263 perf_event__handler_t process,
264 struct machine *machine)
265{
266 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
267
268
269
270
271
272
273 if (tgid == pid) {
274 event->fork.ppid = ppid;
275 event->fork.ptid = ppid;
276 } else {
277 event->fork.ppid = tgid;
278 event->fork.ptid = tgid;
279 }
280 event->fork.pid = tgid;
281 event->fork.tid = pid;
282 event->fork.header.type = PERF_RECORD_FORK;
283 event->fork.header.misc = PERF_RECORD_MISC_FORK_EXEC;
284
285 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
286
287 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
288 return -1;
289
290 return 0;
291}
292
293static bool read_proc_maps_line(struct io *io, __u64 *start, __u64 *end,
294 u32 *prot, u32 *flags, __u64 *offset,
295 u32 *maj, u32 *min,
296 __u64 *inode,
297 ssize_t pathname_size, char *pathname)
298{
299 __u64 temp;
300 int ch;
301 char *start_pathname = pathname;
302
303 if (io__get_hex(io, start) != '-')
304 return false;
305 if (io__get_hex(io, end) != ' ')
306 return false;
307
308
309 *prot = 0;
310 ch = io__get_char(io);
311 if (ch == 'r')
312 *prot |= PROT_READ;
313 else if (ch != '-')
314 return false;
315 ch = io__get_char(io);
316 if (ch == 'w')
317 *prot |= PROT_WRITE;
318 else if (ch != '-')
319 return false;
320 ch = io__get_char(io);
321 if (ch == 'x')
322 *prot |= PROT_EXEC;
323 else if (ch != '-')
324 return false;
325 ch = io__get_char(io);
326 if (ch == 's')
327 *flags = MAP_SHARED;
328 else if (ch == 'p')
329 *flags = MAP_PRIVATE;
330 else
331 return false;
332 if (io__get_char(io) != ' ')
333 return false;
334
335 if (io__get_hex(io, offset) != ' ')
336 return false;
337
338 if (io__get_hex(io, &temp) != ':')
339 return false;
340 *maj = temp;
341 if (io__get_hex(io, &temp) != ' ')
342 return false;
343 *min = temp;
344
345 ch = io__get_dec(io, inode);
346 if (ch != ' ') {
347 *pathname = '\0';
348 return ch == '\n';
349 }
350 do {
351 ch = io__get_char(io);
352 } while (ch == ' ');
353 while (true) {
354 if (ch < 0)
355 return false;
356 if (ch == '\0' || ch == '\n' ||
357 (pathname + 1 - start_pathname) >= pathname_size) {
358 *pathname = '\0';
359 return true;
360 }
361 *pathname++ = ch;
362 ch = io__get_char(io);
363 }
364}
365
366static void perf_record_mmap2__read_build_id(struct perf_record_mmap2 *event,
367 bool is_kernel)
368{
369 struct build_id bid;
370 int rc;
371
372 if (is_kernel)
373 rc = sysfs__read_build_id("/sys/kernel/notes", &bid);
374 else
375 rc = filename__read_build_id(event->filename, &bid) > 0 ? 0 : -1;
376
377 if (rc == 0) {
378 memcpy(event->build_id, bid.data, sizeof(bid.data));
379 event->build_id_size = (u8) bid.size;
380 event->header.misc |= PERF_RECORD_MISC_MMAP_BUILD_ID;
381 event->__reserved_1 = 0;
382 event->__reserved_2 = 0;
383 } else {
384 if (event->filename[0] == '/') {
385 pr_debug2("Failed to read build ID for %s\n",
386 event->filename);
387 }
388 }
389}
390
391int perf_event__synthesize_mmap_events(struct perf_tool *tool,
392 union perf_event *event,
393 pid_t pid, pid_t tgid,
394 perf_event__handler_t process,
395 struct machine *machine,
396 bool mmap_data)
397{
398 unsigned long long t;
399 char bf[BUFSIZ];
400 struct io io;
401 bool truncation = false;
402 unsigned long long timeout = proc_map_timeout * 1000000ULL;
403 int rc = 0;
404 const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
405 int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
406
407 if (machine__is_default_guest(machine))
408 return 0;
409
410 snprintf(bf, sizeof(bf), "%s/proc/%d/task/%d/maps",
411 machine->root_dir, pid, pid);
412
413 io.fd = open(bf, O_RDONLY, 0);
414 if (io.fd < 0) {
415
416
417
418 pr_debug("couldn't open %s\n", bf);
419 return -1;
420 }
421 io__init(&io, io.fd, bf, sizeof(bf));
422
423 event->header.type = PERF_RECORD_MMAP2;
424 t = rdclock();
425
426 while (!io.eof) {
427 static const char anonstr[] = "//anon";
428 size_t size, aligned_size;
429
430
431 event->mmap2.filename[0] = '\0';
432
433
434 if (!read_proc_maps_line(&io,
435 &event->mmap2.start,
436 &event->mmap2.len,
437 &event->mmap2.prot,
438 &event->mmap2.flags,
439 &event->mmap2.pgoff,
440 &event->mmap2.maj,
441 &event->mmap2.min,
442 &event->mmap2.ino,
443 sizeof(event->mmap2.filename),
444 event->mmap2.filename))
445 continue;
446
447 if ((rdclock() - t) > timeout) {
448 pr_warning("Reading %s/proc/%d/task/%d/maps time out. "
449 "You may want to increase "
450 "the time limit by --proc-map-timeout\n",
451 machine->root_dir, pid, pid);
452 truncation = true;
453 goto out;
454 }
455
456 event->mmap2.ino_generation = 0;
457
458
459
460
461 if (machine__is_host(machine))
462 event->header.misc = PERF_RECORD_MISC_USER;
463 else
464 event->header.misc = PERF_RECORD_MISC_GUEST_USER;
465
466 if ((event->mmap2.prot & PROT_EXEC) == 0) {
467 if (!mmap_data || (event->mmap2.prot & PROT_READ) == 0)
468 continue;
469
470 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
471 }
472
473out:
474 if (truncation)
475 event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
476
477 if (!strcmp(event->mmap2.filename, ""))
478 strcpy(event->mmap2.filename, anonstr);
479
480 if (hugetlbfs_mnt_len &&
481 !strncmp(event->mmap2.filename, hugetlbfs_mnt,
482 hugetlbfs_mnt_len)) {
483 strcpy(event->mmap2.filename, anonstr);
484 event->mmap2.flags |= MAP_HUGETLB;
485 }
486
487 size = strlen(event->mmap2.filename) + 1;
488 aligned_size = PERF_ALIGN(size, sizeof(u64));
489 event->mmap2.len -= event->mmap.start;
490 event->mmap2.header.size = (sizeof(event->mmap2) -
491 (sizeof(event->mmap2.filename) - aligned_size));
492 memset(event->mmap2.filename + size, 0, machine->id_hdr_size +
493 (aligned_size - size));
494 event->mmap2.header.size += machine->id_hdr_size;
495 event->mmap2.pid = tgid;
496 event->mmap2.tid = pid;
497
498 if (symbol_conf.buildid_mmap2)
499 perf_record_mmap2__read_build_id(&event->mmap2, false);
500
501 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
502 rc = -1;
503 break;
504 }
505
506 if (truncation)
507 break;
508 }
509
510 close(io.fd);
511 return rc;
512}
513
514#ifdef HAVE_FILE_HANDLE
515static int perf_event__synthesize_cgroup(struct perf_tool *tool,
516 union perf_event *event,
517 char *path, size_t mount_len,
518 perf_event__handler_t process,
519 struct machine *machine)
520{
521 size_t event_size = sizeof(event->cgroup) - sizeof(event->cgroup.path);
522 size_t path_len = strlen(path) - mount_len + 1;
523 struct {
524 struct file_handle fh;
525 uint64_t cgroup_id;
526 } handle;
527 int mount_id;
528
529 while (path_len % sizeof(u64))
530 path[mount_len + path_len++] = '\0';
531
532 memset(&event->cgroup, 0, event_size);
533
534 event->cgroup.header.type = PERF_RECORD_CGROUP;
535 event->cgroup.header.size = event_size + path_len + machine->id_hdr_size;
536
537 handle.fh.handle_bytes = sizeof(handle.cgroup_id);
538 if (name_to_handle_at(AT_FDCWD, path, &handle.fh, &mount_id, 0) < 0) {
539 pr_debug("stat failed: %s\n", path);
540 return -1;
541 }
542
543 event->cgroup.id = handle.cgroup_id;
544 strncpy(event->cgroup.path, path + mount_len, path_len);
545 memset(event->cgroup.path + path_len, 0, machine->id_hdr_size);
546
547 if (perf_tool__process_synth_event(tool, event, machine, process) < 0) {
548 pr_debug("process synth event failed\n");
549 return -1;
550 }
551
552 return 0;
553}
554
555static int perf_event__walk_cgroup_tree(struct perf_tool *tool,
556 union perf_event *event,
557 char *path, size_t mount_len,
558 perf_event__handler_t process,
559 struct machine *machine)
560{
561 size_t pos = strlen(path);
562 DIR *d;
563 struct dirent *dent;
564 int ret = 0;
565
566 if (perf_event__synthesize_cgroup(tool, event, path, mount_len,
567 process, machine) < 0)
568 return -1;
569
570 d = opendir(path);
571 if (d == NULL) {
572 pr_debug("failed to open directory: %s\n", path);
573 return -1;
574 }
575
576 while ((dent = readdir(d)) != NULL) {
577 if (dent->d_type != DT_DIR)
578 continue;
579 if (!strcmp(dent->d_name, ".") ||
580 !strcmp(dent->d_name, ".."))
581 continue;
582
583
584 if (strlen(path) + strlen(dent->d_name) + 1 >= PATH_MAX)
585 continue;
586
587 if (path[pos - 1] != '/')
588 strcat(path, "/");
589 strcat(path, dent->d_name);
590
591 ret = perf_event__walk_cgroup_tree(tool, event, path,
592 mount_len, process, machine);
593 if (ret < 0)
594 break;
595
596 path[pos] = '\0';
597 }
598
599 closedir(d);
600 return ret;
601}
602
603int perf_event__synthesize_cgroups(struct perf_tool *tool,
604 perf_event__handler_t process,
605 struct machine *machine)
606{
607 union perf_event event;
608 char cgrp_root[PATH_MAX];
609 size_t mount_len;
610
611 if (!tool || !tool->cgroup_events)
612 return 0;
613
614 if (cgroupfs_find_mountpoint(cgrp_root, PATH_MAX, "perf_event") < 0) {
615 pr_debug("cannot find cgroup mount point\n");
616 return -1;
617 }
618
619 mount_len = strlen(cgrp_root);
620
621 strcat(cgrp_root, "/");
622
623 if (perf_event__walk_cgroup_tree(tool, &event, cgrp_root, mount_len,
624 process, machine) < 0)
625 return -1;
626
627 return 0;
628}
629#else
630int perf_event__synthesize_cgroups(struct perf_tool *tool __maybe_unused,
631 perf_event__handler_t process __maybe_unused,
632 struct machine *machine __maybe_unused)
633{
634 return -1;
635}
636#endif
637
638int perf_event__synthesize_modules(struct perf_tool *tool, perf_event__handler_t process,
639 struct machine *machine)
640{
641 int rc = 0;
642 struct map *pos;
643 struct maps *maps = machine__kernel_maps(machine);
644 union perf_event *event;
645 size_t size = symbol_conf.buildid_mmap2 ?
646 sizeof(event->mmap2) : sizeof(event->mmap);
647
648 event = zalloc(size + machine->id_hdr_size);
649 if (event == NULL) {
650 pr_debug("Not enough memory synthesizing mmap event "
651 "for kernel modules\n");
652 return -1;
653 }
654
655
656
657
658
659 if (machine__is_host(machine))
660 event->header.misc = PERF_RECORD_MISC_KERNEL;
661 else
662 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
663
664 maps__for_each_entry(maps, pos) {
665 if (!__map__is_kmodule(pos))
666 continue;
667
668 if (symbol_conf.buildid_mmap2) {
669 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
670 event->mmap2.header.type = PERF_RECORD_MMAP2;
671 event->mmap2.header.size = (sizeof(event->mmap2) -
672 (sizeof(event->mmap2.filename) - size));
673 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
674 event->mmap2.header.size += machine->id_hdr_size;
675 event->mmap2.start = pos->start;
676 event->mmap2.len = pos->end - pos->start;
677 event->mmap2.pid = machine->pid;
678
679 memcpy(event->mmap2.filename, pos->dso->long_name,
680 pos->dso->long_name_len + 1);
681
682 perf_record_mmap2__read_build_id(&event->mmap2, false);
683 } else {
684 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
685 event->mmap.header.type = PERF_RECORD_MMAP;
686 event->mmap.header.size = (sizeof(event->mmap) -
687 (sizeof(event->mmap.filename) - size));
688 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
689 event->mmap.header.size += machine->id_hdr_size;
690 event->mmap.start = pos->start;
691 event->mmap.len = pos->end - pos->start;
692 event->mmap.pid = machine->pid;
693
694 memcpy(event->mmap.filename, pos->dso->long_name,
695 pos->dso->long_name_len + 1);
696 }
697
698 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
699 rc = -1;
700 break;
701 }
702 }
703
704 free(event);
705 return rc;
706}
707
708static int filter_task(const struct dirent *dirent)
709{
710 return isdigit(dirent->d_name[0]);
711}
712
713static int __event__synthesize_thread(union perf_event *comm_event,
714 union perf_event *mmap_event,
715 union perf_event *fork_event,
716 union perf_event *namespaces_event,
717 pid_t pid, int full, perf_event__handler_t process,
718 struct perf_tool *tool, struct machine *machine, bool mmap_data)
719{
720 char filename[PATH_MAX];
721 struct dirent **dirent;
722 pid_t tgid, ppid;
723 int rc = 0;
724 int i, n;
725
726
727 if (!full) {
728 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
729 process, machine);
730
731 if (tgid == -1)
732 return -1;
733
734 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
735 tgid, process, machine) < 0)
736 return -1;
737
738
739
740
741
742 if (pid == tgid &&
743 perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
744 process, machine, mmap_data))
745 return -1;
746
747 return 0;
748 }
749
750 if (machine__is_default_guest(machine))
751 return 0;
752
753 snprintf(filename, sizeof(filename), "%s/proc/%d/task",
754 machine->root_dir, pid);
755
756 n = scandir(filename, &dirent, filter_task, alphasort);
757 if (n < 0)
758 return n;
759
760 for (i = 0; i < n; i++) {
761 char *end;
762 pid_t _pid;
763 bool kernel_thread = false;
764
765 _pid = strtol(dirent[i]->d_name, &end, 10);
766 if (*end)
767 continue;
768
769 rc = -1;
770 if (perf_event__prepare_comm(comm_event, pid, _pid, machine,
771 &tgid, &ppid, &kernel_thread) != 0)
772 break;
773
774 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
775 ppid, process, machine) < 0)
776 break;
777
778 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
779 tgid, process, machine) < 0)
780 break;
781
782
783
784
785 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
786 break;
787
788 rc = 0;
789 if (_pid == pid && !kernel_thread) {
790
791 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
792 process, machine, mmap_data);
793 if (rc)
794 break;
795 }
796 }
797
798 for (i = 0; i < n; i++)
799 zfree(&dirent[i]);
800 free(dirent);
801
802 return rc;
803}
804
805int perf_event__synthesize_thread_map(struct perf_tool *tool,
806 struct perf_thread_map *threads,
807 perf_event__handler_t process,
808 struct machine *machine,
809 bool mmap_data)
810{
811 union perf_event *comm_event, *mmap_event, *fork_event;
812 union perf_event *namespaces_event;
813 int err = -1, thread, j;
814
815 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
816 if (comm_event == NULL)
817 goto out;
818
819 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
820 if (mmap_event == NULL)
821 goto out_free_comm;
822
823 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
824 if (fork_event == NULL)
825 goto out_free_mmap;
826
827 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
828 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
829 machine->id_hdr_size);
830 if (namespaces_event == NULL)
831 goto out_free_fork;
832
833 err = 0;
834 for (thread = 0; thread < threads->nr; ++thread) {
835 if (__event__synthesize_thread(comm_event, mmap_event,
836 fork_event, namespaces_event,
837 perf_thread_map__pid(threads, thread), 0,
838 process, tool, machine,
839 mmap_data)) {
840 err = -1;
841 break;
842 }
843
844
845
846
847
848 if ((int) comm_event->comm.pid != perf_thread_map__pid(threads, thread)) {
849 bool need_leader = true;
850
851
852 for (j = 0; j < threads->nr; ++j) {
853 if ((int) comm_event->comm.pid == perf_thread_map__pid(threads, j)) {
854 need_leader = false;
855 break;
856 }
857 }
858
859
860 if (need_leader &&
861 __event__synthesize_thread(comm_event, mmap_event,
862 fork_event, namespaces_event,
863 comm_event->comm.pid, 0,
864 process, tool, machine,
865 mmap_data)) {
866 err = -1;
867 break;
868 }
869 }
870 }
871 free(namespaces_event);
872out_free_fork:
873 free(fork_event);
874out_free_mmap:
875 free(mmap_event);
876out_free_comm:
877 free(comm_event);
878out:
879 return err;
880}
881
882static int __perf_event__synthesize_threads(struct perf_tool *tool,
883 perf_event__handler_t process,
884 struct machine *machine,
885 bool mmap_data,
886 struct dirent **dirent,
887 int start,
888 int num)
889{
890 union perf_event *comm_event, *mmap_event, *fork_event;
891 union perf_event *namespaces_event;
892 int err = -1;
893 char *end;
894 pid_t pid;
895 int i;
896
897 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
898 if (comm_event == NULL)
899 goto out;
900
901 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
902 if (mmap_event == NULL)
903 goto out_free_comm;
904
905 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
906 if (fork_event == NULL)
907 goto out_free_mmap;
908
909 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
910 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
911 machine->id_hdr_size);
912 if (namespaces_event == NULL)
913 goto out_free_fork;
914
915 for (i = start; i < start + num; i++) {
916 if (!isdigit(dirent[i]->d_name[0]))
917 continue;
918
919 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
920
921 if (*end)
922 continue;
923
924
925
926
927 __event__synthesize_thread(comm_event, mmap_event, fork_event,
928 namespaces_event, pid, 1, process,
929 tool, machine, mmap_data);
930 }
931 err = 0;
932
933 free(namespaces_event);
934out_free_fork:
935 free(fork_event);
936out_free_mmap:
937 free(mmap_event);
938out_free_comm:
939 free(comm_event);
940out:
941 return err;
942}
943
944struct synthesize_threads_arg {
945 struct perf_tool *tool;
946 perf_event__handler_t process;
947 struct machine *machine;
948 bool mmap_data;
949 struct dirent **dirent;
950 int num;
951 int start;
952};
953
954static void *synthesize_threads_worker(void *arg)
955{
956 struct synthesize_threads_arg *args = arg;
957
958 __perf_event__synthesize_threads(args->tool, args->process,
959 args->machine, args->mmap_data,
960 args->dirent,
961 args->start, args->num);
962 return NULL;
963}
964
965int perf_event__synthesize_threads(struct perf_tool *tool,
966 perf_event__handler_t process,
967 struct machine *machine,
968 bool mmap_data,
969 unsigned int nr_threads_synthesize)
970{
971 struct synthesize_threads_arg *args = NULL;
972 pthread_t *synthesize_threads = NULL;
973 char proc_path[PATH_MAX];
974 struct dirent **dirent;
975 int num_per_thread;
976 int m, n, i, j;
977 int thread_nr;
978 int base = 0;
979 int err = -1;
980
981
982 if (machine__is_default_guest(machine))
983 return 0;
984
985 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
986 n = scandir(proc_path, &dirent, filter_task, alphasort);
987 if (n < 0)
988 return err;
989
990 if (nr_threads_synthesize == UINT_MAX)
991 thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
992 else
993 thread_nr = nr_threads_synthesize;
994
995 if (thread_nr <= 1) {
996 err = __perf_event__synthesize_threads(tool, process,
997 machine, mmap_data,
998 dirent, base, n);
999 goto free_dirent;
1000 }
1001 if (thread_nr > n)
1002 thread_nr = n;
1003
1004 synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
1005 if (synthesize_threads == NULL)
1006 goto free_dirent;
1007
1008 args = calloc(sizeof(*args), thread_nr);
1009 if (args == NULL)
1010 goto free_threads;
1011
1012 num_per_thread = n / thread_nr;
1013 m = n % thread_nr;
1014 for (i = 0; i < thread_nr; i++) {
1015 args[i].tool = tool;
1016 args[i].process = process;
1017 args[i].machine = machine;
1018 args[i].mmap_data = mmap_data;
1019 args[i].dirent = dirent;
1020 }
1021 for (i = 0; i < m; i++) {
1022 args[i].num = num_per_thread + 1;
1023 args[i].start = i * args[i].num;
1024 }
1025 if (i != 0)
1026 base = args[i-1].start + args[i-1].num;
1027 for (j = i; j < thread_nr; j++) {
1028 args[j].num = num_per_thread;
1029 args[j].start = base + (j - i) * args[i].num;
1030 }
1031
1032 for (i = 0; i < thread_nr; i++) {
1033 if (pthread_create(&synthesize_threads[i], NULL,
1034 synthesize_threads_worker, &args[i]))
1035 goto out_join;
1036 }
1037 err = 0;
1038out_join:
1039 for (i = 0; i < thread_nr; i++)
1040 pthread_join(synthesize_threads[i], NULL);
1041 free(args);
1042free_threads:
1043 free(synthesize_threads);
1044free_dirent:
1045 for (i = 0; i < n; i++)
1046 zfree(&dirent[i]);
1047 free(dirent);
1048
1049 return err;
1050}
1051
1052int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused,
1053 perf_event__handler_t process __maybe_unused,
1054 struct machine *machine __maybe_unused)
1055{
1056 return 0;
1057}
1058
1059static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
1060 perf_event__handler_t process,
1061 struct machine *machine)
1062{
1063 union perf_event *event;
1064 size_t size = symbol_conf.buildid_mmap2 ?
1065 sizeof(event->mmap2) : sizeof(event->mmap);
1066 struct map *map = machine__kernel_map(machine);
1067 struct kmap *kmap;
1068 int err;
1069
1070 if (map == NULL)
1071 return -1;
1072
1073 kmap = map__kmap(map);
1074 if (!kmap->ref_reloc_sym)
1075 return -1;
1076
1077
1078
1079
1080
1081
1082 event = zalloc(size + machine->id_hdr_size);
1083 if (event == NULL) {
1084 pr_debug("Not enough memory synthesizing mmap event "
1085 "for kernel modules\n");
1086 return -1;
1087 }
1088
1089 if (machine__is_host(machine)) {
1090
1091
1092
1093
1094 event->header.misc = PERF_RECORD_MISC_KERNEL;
1095 } else {
1096 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
1097 }
1098
1099 if (symbol_conf.buildid_mmap2) {
1100 size = snprintf(event->mmap2.filename, sizeof(event->mmap2.filename),
1101 "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
1102 size = PERF_ALIGN(size, sizeof(u64));
1103 event->mmap2.header.type = PERF_RECORD_MMAP2;
1104 event->mmap2.header.size = (sizeof(event->mmap2) -
1105 (sizeof(event->mmap2.filename) - size) + machine->id_hdr_size);
1106 event->mmap2.pgoff = kmap->ref_reloc_sym->addr;
1107 event->mmap2.start = map->start;
1108 event->mmap2.len = map->end - event->mmap.start;
1109 event->mmap2.pid = machine->pid;
1110
1111 perf_record_mmap2__read_build_id(&event->mmap2, true);
1112 } else {
1113 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
1114 "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
1115 size = PERF_ALIGN(size, sizeof(u64));
1116 event->mmap.header.type = PERF_RECORD_MMAP;
1117 event->mmap.header.size = (sizeof(event->mmap) -
1118 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
1119 event->mmap.pgoff = kmap->ref_reloc_sym->addr;
1120 event->mmap.start = map->start;
1121 event->mmap.len = map->end - event->mmap.start;
1122 event->mmap.pid = machine->pid;
1123 }
1124
1125 err = perf_tool__process_synth_event(tool, event, machine, process);
1126 free(event);
1127
1128 return err;
1129}
1130
1131int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
1132 perf_event__handler_t process,
1133 struct machine *machine)
1134{
1135 int err;
1136
1137 err = __perf_event__synthesize_kernel_mmap(tool, process, machine);
1138 if (err < 0)
1139 return err;
1140
1141 return perf_event__synthesize_extra_kmaps(tool, process, machine);
1142}
1143
1144int perf_event__synthesize_thread_map2(struct perf_tool *tool,
1145 struct perf_thread_map *threads,
1146 perf_event__handler_t process,
1147 struct machine *machine)
1148{
1149 union perf_event *event;
1150 int i, err, size;
1151
1152 size = sizeof(event->thread_map);
1153 size += threads->nr * sizeof(event->thread_map.entries[0]);
1154
1155 event = zalloc(size);
1156 if (!event)
1157 return -ENOMEM;
1158
1159 event->header.type = PERF_RECORD_THREAD_MAP;
1160 event->header.size = size;
1161 event->thread_map.nr = threads->nr;
1162
1163 for (i = 0; i < threads->nr; i++) {
1164 struct perf_record_thread_map_entry *entry = &event->thread_map.entries[i];
1165 char *comm = perf_thread_map__comm(threads, i);
1166
1167 if (!comm)
1168 comm = (char *) "";
1169
1170 entry->pid = perf_thread_map__pid(threads, i);
1171 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
1172 }
1173
1174 err = process(tool, event, NULL, machine);
1175
1176 free(event);
1177 return err;
1178}
1179
1180static void synthesize_cpus(struct cpu_map_entries *cpus,
1181 struct perf_cpu_map *map)
1182{
1183 int i;
1184
1185 cpus->nr = map->nr;
1186
1187 for (i = 0; i < map->nr; i++)
1188 cpus->cpu[i] = map->map[i];
1189}
1190
1191static void synthesize_mask(struct perf_record_record_cpu_map *mask,
1192 struct perf_cpu_map *map, int max)
1193{
1194 int i;
1195
1196 mask->nr = BITS_TO_LONGS(max);
1197 mask->long_size = sizeof(long);
1198
1199 for (i = 0; i < map->nr; i++)
1200 set_bit(map->map[i], mask->mask);
1201}
1202
1203static size_t cpus_size(struct perf_cpu_map *map)
1204{
1205 return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
1206}
1207
1208static size_t mask_size(struct perf_cpu_map *map, int *max)
1209{
1210 int i;
1211
1212 *max = 0;
1213
1214 for (i = 0; i < map->nr; i++) {
1215
1216 int bit = map->map[i] + 1;
1217
1218 if (bit > *max)
1219 *max = bit;
1220 }
1221
1222 return sizeof(struct perf_record_record_cpu_map) + BITS_TO_LONGS(*max) * sizeof(long);
1223}
1224
1225void *cpu_map_data__alloc(struct perf_cpu_map *map, size_t *size, u16 *type, int *max)
1226{
1227 size_t size_cpus, size_mask;
1228 bool is_dummy = perf_cpu_map__empty(map);
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243 size_cpus = cpus_size(map);
1244 size_mask = mask_size(map, max);
1245
1246 if (is_dummy || (size_cpus < size_mask)) {
1247 *size += size_cpus;
1248 *type = PERF_CPU_MAP__CPUS;
1249 } else {
1250 *size += size_mask;
1251 *type = PERF_CPU_MAP__MASK;
1252 }
1253
1254 *size += sizeof(struct perf_record_cpu_map_data);
1255 *size = PERF_ALIGN(*size, sizeof(u64));
1256 return zalloc(*size);
1257}
1258
1259void cpu_map_data__synthesize(struct perf_record_cpu_map_data *data, struct perf_cpu_map *map,
1260 u16 type, int max)
1261{
1262 data->type = type;
1263
1264 switch (type) {
1265 case PERF_CPU_MAP__CPUS:
1266 synthesize_cpus((struct cpu_map_entries *) data->data, map);
1267 break;
1268 case PERF_CPU_MAP__MASK:
1269 synthesize_mask((struct perf_record_record_cpu_map *)data->data, map, max);
1270 default:
1271 break;
1272 }
1273}
1274
1275static struct perf_record_cpu_map *cpu_map_event__new(struct perf_cpu_map *map)
1276{
1277 size_t size = sizeof(struct perf_record_cpu_map);
1278 struct perf_record_cpu_map *event;
1279 int max;
1280 u16 type;
1281
1282 event = cpu_map_data__alloc(map, &size, &type, &max);
1283 if (!event)
1284 return NULL;
1285
1286 event->header.type = PERF_RECORD_CPU_MAP;
1287 event->header.size = size;
1288 event->data.type = type;
1289
1290 cpu_map_data__synthesize(&event->data, map, type, max);
1291 return event;
1292}
1293
1294int perf_event__synthesize_cpu_map(struct perf_tool *tool,
1295 struct perf_cpu_map *map,
1296 perf_event__handler_t process,
1297 struct machine *machine)
1298{
1299 struct perf_record_cpu_map *event;
1300 int err;
1301
1302 event = cpu_map_event__new(map);
1303 if (!event)
1304 return -ENOMEM;
1305
1306 err = process(tool, (union perf_event *) event, NULL, machine);
1307
1308 free(event);
1309 return err;
1310}
1311
1312int perf_event__synthesize_stat_config(struct perf_tool *tool,
1313 struct perf_stat_config *config,
1314 perf_event__handler_t process,
1315 struct machine *machine)
1316{
1317 struct perf_record_stat_config *event;
1318 int size, i = 0, err;
1319
1320 size = sizeof(*event);
1321 size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
1322
1323 event = zalloc(size);
1324 if (!event)
1325 return -ENOMEM;
1326
1327 event->header.type = PERF_RECORD_STAT_CONFIG;
1328 event->header.size = size;
1329 event->nr = PERF_STAT_CONFIG_TERM__MAX;
1330
1331#define ADD(__term, __val) \
1332 event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \
1333 event->data[i].val = __val; \
1334 i++;
1335
1336 ADD(AGGR_MODE, config->aggr_mode)
1337 ADD(INTERVAL, config->interval)
1338 ADD(SCALE, config->scale)
1339
1340 WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
1341 "stat config terms unbalanced\n");
1342#undef ADD
1343
1344 err = process(tool, (union perf_event *) event, NULL, machine);
1345
1346 free(event);
1347 return err;
1348}
1349
1350int perf_event__synthesize_stat(struct perf_tool *tool,
1351 u32 cpu, u32 thread, u64 id,
1352 struct perf_counts_values *count,
1353 perf_event__handler_t process,
1354 struct machine *machine)
1355{
1356 struct perf_record_stat event;
1357
1358 event.header.type = PERF_RECORD_STAT;
1359 event.header.size = sizeof(event);
1360 event.header.misc = 0;
1361
1362 event.id = id;
1363 event.cpu = cpu;
1364 event.thread = thread;
1365 event.val = count->val;
1366 event.ena = count->ena;
1367 event.run = count->run;
1368
1369 return process(tool, (union perf_event *) &event, NULL, machine);
1370}
1371
1372int perf_event__synthesize_stat_round(struct perf_tool *tool,
1373 u64 evtime, u64 type,
1374 perf_event__handler_t process,
1375 struct machine *machine)
1376{
1377 struct perf_record_stat_round event;
1378
1379 event.header.type = PERF_RECORD_STAT_ROUND;
1380 event.header.size = sizeof(event);
1381 event.header.misc = 0;
1382
1383 event.time = evtime;
1384 event.type = type;
1385
1386 return process(tool, (union perf_event *) &event, NULL, machine);
1387}
1388
1389size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type, u64 read_format)
1390{
1391 size_t sz, result = sizeof(struct perf_record_sample);
1392
1393 if (type & PERF_SAMPLE_IDENTIFIER)
1394 result += sizeof(u64);
1395
1396 if (type & PERF_SAMPLE_IP)
1397 result += sizeof(u64);
1398
1399 if (type & PERF_SAMPLE_TID)
1400 result += sizeof(u64);
1401
1402 if (type & PERF_SAMPLE_TIME)
1403 result += sizeof(u64);
1404
1405 if (type & PERF_SAMPLE_ADDR)
1406 result += sizeof(u64);
1407
1408 if (type & PERF_SAMPLE_ID)
1409 result += sizeof(u64);
1410
1411 if (type & PERF_SAMPLE_STREAM_ID)
1412 result += sizeof(u64);
1413
1414 if (type & PERF_SAMPLE_CPU)
1415 result += sizeof(u64);
1416
1417 if (type & PERF_SAMPLE_PERIOD)
1418 result += sizeof(u64);
1419
1420 if (type & PERF_SAMPLE_READ) {
1421 result += sizeof(u64);
1422 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1423 result += sizeof(u64);
1424 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1425 result += sizeof(u64);
1426
1427 if (read_format & PERF_FORMAT_GROUP) {
1428 sz = sample->read.group.nr *
1429 sizeof(struct sample_read_value);
1430 result += sz;
1431 } else {
1432 result += sizeof(u64);
1433 }
1434 }
1435
1436 if (type & PERF_SAMPLE_CALLCHAIN) {
1437 sz = (sample->callchain->nr + 1) * sizeof(u64);
1438 result += sz;
1439 }
1440
1441 if (type & PERF_SAMPLE_RAW) {
1442 result += sizeof(u32);
1443 result += sample->raw_size;
1444 }
1445
1446 if (type & PERF_SAMPLE_BRANCH_STACK) {
1447 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
1448
1449 sz += 2 * sizeof(u64);
1450 result += sz;
1451 }
1452
1453 if (type & PERF_SAMPLE_REGS_USER) {
1454 if (sample->user_regs.abi) {
1455 result += sizeof(u64);
1456 sz = hweight64(sample->user_regs.mask) * sizeof(u64);
1457 result += sz;
1458 } else {
1459 result += sizeof(u64);
1460 }
1461 }
1462
1463 if (type & PERF_SAMPLE_STACK_USER) {
1464 sz = sample->user_stack.size;
1465 result += sizeof(u64);
1466 if (sz) {
1467 result += sz;
1468 result += sizeof(u64);
1469 }
1470 }
1471
1472 if (type & PERF_SAMPLE_WEIGHT_TYPE)
1473 result += sizeof(u64);
1474
1475 if (type & PERF_SAMPLE_DATA_SRC)
1476 result += sizeof(u64);
1477
1478 if (type & PERF_SAMPLE_TRANSACTION)
1479 result += sizeof(u64);
1480
1481 if (type & PERF_SAMPLE_REGS_INTR) {
1482 if (sample->intr_regs.abi) {
1483 result += sizeof(u64);
1484 sz = hweight64(sample->intr_regs.mask) * sizeof(u64);
1485 result += sz;
1486 } else {
1487 result += sizeof(u64);
1488 }
1489 }
1490
1491 if (type & PERF_SAMPLE_PHYS_ADDR)
1492 result += sizeof(u64);
1493
1494 if (type & PERF_SAMPLE_CGROUP)
1495 result += sizeof(u64);
1496
1497 if (type & PERF_SAMPLE_DATA_PAGE_SIZE)
1498 result += sizeof(u64);
1499
1500 if (type & PERF_SAMPLE_CODE_PAGE_SIZE)
1501 result += sizeof(u64);
1502
1503 if (type & PERF_SAMPLE_AUX) {
1504 result += sizeof(u64);
1505 result += sample->aux_sample.size;
1506 }
1507
1508 return result;
1509}
1510
1511void __weak arch_perf_synthesize_sample_weight(const struct perf_sample *data,
1512 __u64 *array, u64 type __maybe_unused)
1513{
1514 *array = data->weight;
1515}
1516
1517int perf_event__synthesize_sample(union perf_event *event, u64 type, u64 read_format,
1518 const struct perf_sample *sample)
1519{
1520 __u64 *array;
1521 size_t sz;
1522
1523
1524
1525
1526 union u64_swap u;
1527
1528 array = event->sample.array;
1529
1530 if (type & PERF_SAMPLE_IDENTIFIER) {
1531 *array = sample->id;
1532 array++;
1533 }
1534
1535 if (type & PERF_SAMPLE_IP) {
1536 *array = sample->ip;
1537 array++;
1538 }
1539
1540 if (type & PERF_SAMPLE_TID) {
1541 u.val32[0] = sample->pid;
1542 u.val32[1] = sample->tid;
1543 *array = u.val64;
1544 array++;
1545 }
1546
1547 if (type & PERF_SAMPLE_TIME) {
1548 *array = sample->time;
1549 array++;
1550 }
1551
1552 if (type & PERF_SAMPLE_ADDR) {
1553 *array = sample->addr;
1554 array++;
1555 }
1556
1557 if (type & PERF_SAMPLE_ID) {
1558 *array = sample->id;
1559 array++;
1560 }
1561
1562 if (type & PERF_SAMPLE_STREAM_ID) {
1563 *array = sample->stream_id;
1564 array++;
1565 }
1566
1567 if (type & PERF_SAMPLE_CPU) {
1568 u.val32[0] = sample->cpu;
1569 u.val32[1] = 0;
1570 *array = u.val64;
1571 array++;
1572 }
1573
1574 if (type & PERF_SAMPLE_PERIOD) {
1575 *array = sample->period;
1576 array++;
1577 }
1578
1579 if (type & PERF_SAMPLE_READ) {
1580 if (read_format & PERF_FORMAT_GROUP)
1581 *array = sample->read.group.nr;
1582 else
1583 *array = sample->read.one.value;
1584 array++;
1585
1586 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
1587 *array = sample->read.time_enabled;
1588 array++;
1589 }
1590
1591 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
1592 *array = sample->read.time_running;
1593 array++;
1594 }
1595
1596
1597 if (read_format & PERF_FORMAT_GROUP) {
1598 sz = sample->read.group.nr *
1599 sizeof(struct sample_read_value);
1600 memcpy(array, sample->read.group.values, sz);
1601 array = (void *)array + sz;
1602 } else {
1603 *array = sample->read.one.id;
1604 array++;
1605 }
1606 }
1607
1608 if (type & PERF_SAMPLE_CALLCHAIN) {
1609 sz = (sample->callchain->nr + 1) * sizeof(u64);
1610 memcpy(array, sample->callchain, sz);
1611 array = (void *)array + sz;
1612 }
1613
1614 if (type & PERF_SAMPLE_RAW) {
1615 u.val32[0] = sample->raw_size;
1616 *array = u.val64;
1617 array = (void *)array + sizeof(u32);
1618
1619 memcpy(array, sample->raw_data, sample->raw_size);
1620 array = (void *)array + sample->raw_size;
1621 }
1622
1623 if (type & PERF_SAMPLE_BRANCH_STACK) {
1624 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
1625
1626 sz += 2 * sizeof(u64);
1627 memcpy(array, sample->branch_stack, sz);
1628 array = (void *)array + sz;
1629 }
1630
1631 if (type & PERF_SAMPLE_REGS_USER) {
1632 if (sample->user_regs.abi) {
1633 *array++ = sample->user_regs.abi;
1634 sz = hweight64(sample->user_regs.mask) * sizeof(u64);
1635 memcpy(array, sample->user_regs.regs, sz);
1636 array = (void *)array + sz;
1637 } else {
1638 *array++ = 0;
1639 }
1640 }
1641
1642 if (type & PERF_SAMPLE_STACK_USER) {
1643 sz = sample->user_stack.size;
1644 *array++ = sz;
1645 if (sz) {
1646 memcpy(array, sample->user_stack.data, sz);
1647 array = (void *)array + sz;
1648 *array++ = sz;
1649 }
1650 }
1651
1652 if (type & PERF_SAMPLE_WEIGHT_TYPE) {
1653 arch_perf_synthesize_sample_weight(sample, array, type);
1654 array++;
1655 }
1656
1657 if (type & PERF_SAMPLE_DATA_SRC) {
1658 *array = sample->data_src;
1659 array++;
1660 }
1661
1662 if (type & PERF_SAMPLE_TRANSACTION) {
1663 *array = sample->transaction;
1664 array++;
1665 }
1666
1667 if (type & PERF_SAMPLE_REGS_INTR) {
1668 if (sample->intr_regs.abi) {
1669 *array++ = sample->intr_regs.abi;
1670 sz = hweight64(sample->intr_regs.mask) * sizeof(u64);
1671 memcpy(array, sample->intr_regs.regs, sz);
1672 array = (void *)array + sz;
1673 } else {
1674 *array++ = 0;
1675 }
1676 }
1677
1678 if (type & PERF_SAMPLE_PHYS_ADDR) {
1679 *array = sample->phys_addr;
1680 array++;
1681 }
1682
1683 if (type & PERF_SAMPLE_CGROUP) {
1684 *array = sample->cgroup;
1685 array++;
1686 }
1687
1688 if (type & PERF_SAMPLE_DATA_PAGE_SIZE) {
1689 *array = sample->data_page_size;
1690 array++;
1691 }
1692
1693 if (type & PERF_SAMPLE_CODE_PAGE_SIZE) {
1694 *array = sample->code_page_size;
1695 array++;
1696 }
1697
1698 if (type & PERF_SAMPLE_AUX) {
1699 sz = sample->aux_sample.size;
1700 *array++ = sz;
1701 memcpy(array, sample->aux_sample.data, sz);
1702 array = (void *)array + sz;
1703 }
1704
1705 return 0;
1706}
1707
1708int perf_event__synthesize_id_index(struct perf_tool *tool, perf_event__handler_t process,
1709 struct evlist *evlist, struct machine *machine)
1710{
1711 union perf_event *ev;
1712 struct evsel *evsel;
1713 size_t nr = 0, i = 0, sz, max_nr, n;
1714 int err;
1715
1716 pr_debug2("Synthesizing id index\n");
1717
1718 max_nr = (UINT16_MAX - sizeof(struct perf_record_id_index)) /
1719 sizeof(struct id_index_entry);
1720
1721 evlist__for_each_entry(evlist, evsel)
1722 nr += evsel->core.ids;
1723
1724 n = nr > max_nr ? max_nr : nr;
1725 sz = sizeof(struct perf_record_id_index) + n * sizeof(struct id_index_entry);
1726 ev = zalloc(sz);
1727 if (!ev)
1728 return -ENOMEM;
1729
1730 ev->id_index.header.type = PERF_RECORD_ID_INDEX;
1731 ev->id_index.header.size = sz;
1732 ev->id_index.nr = n;
1733
1734 evlist__for_each_entry(evlist, evsel) {
1735 u32 j;
1736
1737 for (j = 0; j < evsel->core.ids; j++) {
1738 struct id_index_entry *e;
1739 struct perf_sample_id *sid;
1740
1741 if (i >= n) {
1742 err = process(tool, ev, NULL, machine);
1743 if (err)
1744 goto out_err;
1745 nr -= n;
1746 i = 0;
1747 }
1748
1749 e = &ev->id_index.entries[i++];
1750
1751 e->id = evsel->core.id[j];
1752
1753 sid = evlist__id2sid(evlist, e->id);
1754 if (!sid) {
1755 free(ev);
1756 return -ENOENT;
1757 }
1758
1759 e->idx = sid->idx;
1760 e->cpu = sid->cpu;
1761 e->tid = sid->tid;
1762 }
1763 }
1764
1765 sz = sizeof(struct perf_record_id_index) + nr * sizeof(struct id_index_entry);
1766 ev->id_index.header.size = sz;
1767 ev->id_index.nr = nr;
1768
1769 err = process(tool, ev, NULL, machine);
1770out_err:
1771 free(ev);
1772
1773 return err;
1774}
1775
1776int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
1777 struct target *target, struct perf_thread_map *threads,
1778 perf_event__handler_t process, bool data_mmap,
1779 unsigned int nr_threads_synthesize)
1780{
1781 if (target__has_task(target))
1782 return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap);
1783 else if (target__has_cpu(target))
1784 return perf_event__synthesize_threads(tool, process,
1785 machine, data_mmap,
1786 nr_threads_synthesize);
1787
1788 return 0;
1789}
1790
1791int machine__synthesize_threads(struct machine *machine, struct target *target,
1792 struct perf_thread_map *threads, bool data_mmap,
1793 unsigned int nr_threads_synthesize)
1794{
1795 return __machine__synthesize_threads(machine, NULL, target, threads,
1796 perf_event__process, data_mmap,
1797 nr_threads_synthesize);
1798}
1799
1800static struct perf_record_event_update *event_update_event__new(size_t size, u64 type, u64 id)
1801{
1802 struct perf_record_event_update *ev;
1803
1804 size += sizeof(*ev);
1805 size = PERF_ALIGN(size, sizeof(u64));
1806
1807 ev = zalloc(size);
1808 if (ev) {
1809 ev->header.type = PERF_RECORD_EVENT_UPDATE;
1810 ev->header.size = (u16)size;
1811 ev->type = type;
1812 ev->id = id;
1813 }
1814 return ev;
1815}
1816
1817int perf_event__synthesize_event_update_unit(struct perf_tool *tool, struct evsel *evsel,
1818 perf_event__handler_t process)
1819{
1820 size_t size = strlen(evsel->unit);
1821 struct perf_record_event_update *ev;
1822 int err;
1823
1824 ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->core.id[0]);
1825 if (ev == NULL)
1826 return -ENOMEM;
1827
1828 strlcpy(ev->data, evsel->unit, size + 1);
1829 err = process(tool, (union perf_event *)ev, NULL, NULL);
1830 free(ev);
1831 return err;
1832}
1833
1834int perf_event__synthesize_event_update_scale(struct perf_tool *tool, struct evsel *evsel,
1835 perf_event__handler_t process)
1836{
1837 struct perf_record_event_update *ev;
1838 struct perf_record_event_update_scale *ev_data;
1839 int err;
1840
1841 ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->core.id[0]);
1842 if (ev == NULL)
1843 return -ENOMEM;
1844
1845 ev_data = (struct perf_record_event_update_scale *)ev->data;
1846 ev_data->scale = evsel->scale;
1847 err = process(tool, (union perf_event *)ev, NULL, NULL);
1848 free(ev);
1849 return err;
1850}
1851
1852int perf_event__synthesize_event_update_name(struct perf_tool *tool, struct evsel *evsel,
1853 perf_event__handler_t process)
1854{
1855 struct perf_record_event_update *ev;
1856 size_t len = strlen(evsel->name);
1857 int err;
1858
1859 ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->core.id[0]);
1860 if (ev == NULL)
1861 return -ENOMEM;
1862
1863 strlcpy(ev->data, evsel->name, len + 1);
1864 err = process(tool, (union perf_event *)ev, NULL, NULL);
1865 free(ev);
1866 return err;
1867}
1868
1869int perf_event__synthesize_event_update_cpus(struct perf_tool *tool, struct evsel *evsel,
1870 perf_event__handler_t process)
1871{
1872 size_t size = sizeof(struct perf_record_event_update);
1873 struct perf_record_event_update *ev;
1874 int max, err;
1875 u16 type;
1876
1877 if (!evsel->core.own_cpus)
1878 return 0;
1879
1880 ev = cpu_map_data__alloc(evsel->core.own_cpus, &size, &type, &max);
1881 if (!ev)
1882 return -ENOMEM;
1883
1884 ev->header.type = PERF_RECORD_EVENT_UPDATE;
1885 ev->header.size = (u16)size;
1886 ev->type = PERF_EVENT_UPDATE__CPUS;
1887 ev->id = evsel->core.id[0];
1888
1889 cpu_map_data__synthesize((struct perf_record_cpu_map_data *)ev->data,
1890 evsel->core.own_cpus, type, max);
1891
1892 err = process(tool, (union perf_event *)ev, NULL, NULL);
1893 free(ev);
1894 return err;
1895}
1896
1897int perf_event__synthesize_attrs(struct perf_tool *tool, struct evlist *evlist,
1898 perf_event__handler_t process)
1899{
1900 struct evsel *evsel;
1901 int err = 0;
1902
1903 evlist__for_each_entry(evlist, evsel) {
1904 err = perf_event__synthesize_attr(tool, &evsel->core.attr, evsel->core.ids,
1905 evsel->core.id, process);
1906 if (err) {
1907 pr_debug("failed to create perf header attribute\n");
1908 return err;
1909 }
1910 }
1911
1912 return err;
1913}
1914
1915static bool has_unit(struct evsel *evsel)
1916{
1917 return evsel->unit && *evsel->unit;
1918}
1919
1920static bool has_scale(struct evsel *evsel)
1921{
1922 return evsel->scale != 1;
1923}
1924
1925int perf_event__synthesize_extra_attr(struct perf_tool *tool, struct evlist *evsel_list,
1926 perf_event__handler_t process, bool is_pipe)
1927{
1928 struct evsel *evsel;
1929 int err;
1930
1931
1932
1933
1934
1935 evlist__for_each_entry(evsel_list, evsel) {
1936 if (!evsel->supported)
1937 continue;
1938
1939
1940
1941
1942 if (has_unit(evsel)) {
1943 err = perf_event__synthesize_event_update_unit(tool, evsel, process);
1944 if (err < 0) {
1945 pr_err("Couldn't synthesize evsel unit.\n");
1946 return err;
1947 }
1948 }
1949
1950 if (has_scale(evsel)) {
1951 err = perf_event__synthesize_event_update_scale(tool, evsel, process);
1952 if (err < 0) {
1953 pr_err("Couldn't synthesize evsel evsel.\n");
1954 return err;
1955 }
1956 }
1957
1958 if (evsel->core.own_cpus) {
1959 err = perf_event__synthesize_event_update_cpus(tool, evsel, process);
1960 if (err < 0) {
1961 pr_err("Couldn't synthesize evsel cpus.\n");
1962 return err;
1963 }
1964 }
1965
1966
1967
1968
1969
1970 if (is_pipe) {
1971 err = perf_event__synthesize_event_update_name(tool, evsel, process);
1972 if (err < 0) {
1973 pr_err("Couldn't synthesize evsel name.\n");
1974 return err;
1975 }
1976 }
1977 }
1978 return 0;
1979}
1980
1981int perf_event__synthesize_attr(struct perf_tool *tool, struct perf_event_attr *attr,
1982 u32 ids, u64 *id, perf_event__handler_t process)
1983{
1984 union perf_event *ev;
1985 size_t size;
1986 int err;
1987
1988 size = sizeof(struct perf_event_attr);
1989 size = PERF_ALIGN(size, sizeof(u64));
1990 size += sizeof(struct perf_event_header);
1991 size += ids * sizeof(u64);
1992
1993 ev = zalloc(size);
1994
1995 if (ev == NULL)
1996 return -ENOMEM;
1997
1998 ev->attr.attr = *attr;
1999 memcpy(ev->attr.id, id, ids * sizeof(u64));
2000
2001 ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
2002 ev->attr.header.size = (u16)size;
2003
2004 if (ev->attr.header.size == size)
2005 err = process(tool, ev, NULL, NULL);
2006 else
2007 err = -E2BIG;
2008
2009 free(ev);
2010
2011 return err;
2012}
2013
2014int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd, struct evlist *evlist,
2015 perf_event__handler_t process)
2016{
2017 union perf_event ev;
2018 struct tracing_data *tdata;
2019 ssize_t size = 0, aligned_size = 0, padding;
2020 struct feat_fd ff;
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033 tdata = tracing_data_get(&evlist->core.entries, fd, true);
2034 if (!tdata)
2035 return -1;
2036
2037 memset(&ev, 0, sizeof(ev));
2038
2039 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
2040 size = tdata->size;
2041 aligned_size = PERF_ALIGN(size, sizeof(u64));
2042 padding = aligned_size - size;
2043 ev.tracing_data.header.size = sizeof(ev.tracing_data);
2044 ev.tracing_data.size = aligned_size;
2045
2046 process(tool, &ev, NULL, NULL);
2047
2048
2049
2050
2051
2052 tracing_data_put(tdata);
2053
2054 ff = (struct feat_fd){ .fd = fd };
2055 if (write_padded(&ff, NULL, 0, padding))
2056 return -1;
2057
2058 return aligned_size;
2059}
2060
2061int perf_event__synthesize_build_id(struct perf_tool *tool, struct dso *pos, u16 misc,
2062 perf_event__handler_t process, struct machine *machine)
2063{
2064 union perf_event ev;
2065 size_t len;
2066
2067 if (!pos->hit)
2068 return 0;
2069
2070 memset(&ev, 0, sizeof(ev));
2071
2072 len = pos->long_name_len + 1;
2073 len = PERF_ALIGN(len, NAME_ALIGN);
2074 memcpy(&ev.build_id.build_id, pos->bid.data, sizeof(pos->bid.data));
2075 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
2076 ev.build_id.header.misc = misc;
2077 ev.build_id.pid = machine->pid;
2078 ev.build_id.header.size = sizeof(ev.build_id) + len;
2079 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
2080
2081 return process(tool, &ev, NULL, machine);
2082}
2083
2084int perf_event__synthesize_stat_events(struct perf_stat_config *config, struct perf_tool *tool,
2085 struct evlist *evlist, perf_event__handler_t process, bool attrs)
2086{
2087 int err;
2088
2089 if (attrs) {
2090 err = perf_event__synthesize_attrs(tool, evlist, process);
2091 if (err < 0) {
2092 pr_err("Couldn't synthesize attrs.\n");
2093 return err;
2094 }
2095 }
2096
2097 err = perf_event__synthesize_extra_attr(tool, evlist, process, attrs);
2098 err = perf_event__synthesize_thread_map2(tool, evlist->core.threads, process, NULL);
2099 if (err < 0) {
2100 pr_err("Couldn't synthesize thread map.\n");
2101 return err;
2102 }
2103
2104 err = perf_event__synthesize_cpu_map(tool, evlist->core.cpus, process, NULL);
2105 if (err < 0) {
2106 pr_err("Couldn't synthesize thread map.\n");
2107 return err;
2108 }
2109
2110 err = perf_event__synthesize_stat_config(tool, config, process, NULL);
2111 if (err < 0) {
2112 pr_err("Couldn't synthesize config.\n");
2113 return err;
2114 }
2115
2116 return 0;
2117}
2118
2119extern const struct perf_header_feature_ops feat_ops[HEADER_LAST_FEATURE];
2120
2121int perf_event__synthesize_features(struct perf_tool *tool, struct perf_session *session,
2122 struct evlist *evlist, perf_event__handler_t process)
2123{
2124 struct perf_header *header = &session->header;
2125 struct perf_record_header_feature *fe;
2126 struct feat_fd ff;
2127 size_t sz, sz_hdr;
2128 int feat, ret;
2129
2130 sz_hdr = sizeof(fe->header);
2131 sz = sizeof(union perf_event);
2132
2133 sz = PERF_ALIGN(sz, page_size);
2134
2135 memset(&ff, 0, sizeof(ff));
2136
2137 ff.buf = malloc(sz);
2138 if (!ff.buf)
2139 return -ENOMEM;
2140
2141 ff.size = sz - sz_hdr;
2142 ff.ph = &session->header;
2143
2144 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
2145 if (!feat_ops[feat].synthesize) {
2146 pr_debug("No record header feature for header :%d\n", feat);
2147 continue;
2148 }
2149
2150 ff.offset = sizeof(*fe);
2151
2152 ret = feat_ops[feat].write(&ff, evlist);
2153 if (ret || ff.offset <= (ssize_t)sizeof(*fe)) {
2154 pr_debug("Error writing feature\n");
2155 continue;
2156 }
2157
2158 fe = ff.buf;
2159 memset(fe, 0, sizeof(*fe));
2160
2161 fe->feat_id = feat;
2162 fe->header.type = PERF_RECORD_HEADER_FEATURE;
2163 fe->header.size = ff.offset;
2164
2165 ret = process(tool, ff.buf, NULL, NULL);
2166 if (ret) {
2167 free(ff.buf);
2168 return ret;
2169 }
2170 }
2171
2172
2173 fe = ff.buf;
2174 fe->feat_id = HEADER_LAST_FEATURE;
2175 fe->header.type = PERF_RECORD_HEADER_FEATURE;
2176 fe->header.size = sizeof(*fe);
2177
2178 ret = process(tool, ff.buf, NULL, NULL);
2179
2180 free(ff.buf);
2181 return ret;
2182}
2183
2184int perf_event__synthesize_for_pipe(struct perf_tool *tool,
2185 struct perf_session *session,
2186 struct perf_data *data,
2187 perf_event__handler_t process)
2188{
2189 int err;
2190 int ret = 0;
2191 struct evlist *evlist = session->evlist;
2192
2193
2194
2195
2196
2197 err = perf_event__synthesize_attrs(tool, evlist, process);
2198 if (err < 0) {
2199 pr_err("Couldn't synthesize attrs.\n");
2200 return err;
2201 }
2202 ret += err;
2203
2204 err = perf_event__synthesize_features(tool, session, evlist, process);
2205 if (err < 0) {
2206 pr_err("Couldn't synthesize features.\n");
2207 return err;
2208 }
2209 ret += err;
2210
2211 if (have_tracepoints(&evlist->core.entries)) {
2212 int fd = perf_data__fd(data);
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222 err = perf_event__synthesize_tracing_data(tool, fd, evlist,
2223 process);
2224 if (err <= 0) {
2225 pr_err("Couldn't record tracing data.\n");
2226 return err;
2227 }
2228 ret += err;
2229 }
2230
2231 return ret;
2232}
2233
