1 // SPDX-License-Identifier: GPL-2.0-only
3 #include "util/cgroup.h"
5 #include "util/debug.h"
7 #include "util/event.h"
8 #include "util/evlist.h"
9 #include "util/machine.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>
27 #include <perf/evsel.h>
28 #include <perf/cpumap.h>
29 #include <internal/lib.h> // page_size
30 #include <internal/threadmap.h>
31 #include <perf/threadmap.h>
32 #include <symbol/kallsyms.h>
38 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
39 #include <api/fs/fs.h>
41 #include <sys/types.h>
46 #define DEFAULT_PROC_MAP_PARSE_TIMEOUT 500
48 unsigned int proc_map_timeout = DEFAULT_PROC_MAP_PARSE_TIMEOUT;
50 int perf_tool__process_synth_event(struct perf_tool *tool,
51 union perf_event *event,
52 struct machine *machine,
53 perf_event__handler_t process)
55 struct perf_sample synth_sample = {
62 .cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
65 return process(tool, event, &synth_sample, machine);
69 * Assumes that the first 4095 bytes of /proc/pid/stat contains
70 * the comm, tgid and ppid.
72 static 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)
79 char *name, *tgids, *ppids, *vmpeak, *threads;
85 snprintf(bf, sizeof(bf), "/proc/%d/task/%d/status", pid, tid);
87 snprintf(bf, sizeof(bf), "/proc/%d/status", tid);
89 fd = open(bf, O_RDONLY);
91 pr_debug("couldn't open %s\n", bf);
95 n = read(fd, bf, sizeof(bf) - 1);
98 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
104 name = strstr(bf, "Name:");
105 tgids = strstr(name ?: bf, "Tgid:");
106 ppids = strstr(tgids ?: bf, "PPid:");
107 vmpeak = strstr(ppids ?: bf, "VmPeak:");
112 threads = strstr(ppids ?: bf, "Threads:");
117 name = skip_spaces(name + 5); /* strlen("Name:") */
118 nl = strchr(name, '\n');
125 memcpy(comm, name, size);
128 pr_debug("Name: string not found for pid %d\n", tid);
132 tgids += 5; /* strlen("Tgid:") */
135 pr_debug("Tgid: string not found for pid %d\n", tid);
139 ppids += 5; /* strlen("PPid:") */
142 pr_debug("PPid: string not found for pid %d\n", tid);
145 if (!vmpeak && threads)
153 static 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)
161 memset(&event->comm, 0, sizeof(event->comm));
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) {
170 *tgid = machine->pid;
176 event->comm.pid = *tgid;
177 event->comm.header.type = PERF_RECORD_COMM;
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;
190 pid_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)
198 if (perf_event__prepare_comm(event, 0, pid, machine, &tgid, &ppid,
199 &kernel_thread) != 0)
202 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
208 static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
209 struct perf_ns_link_info *ns_link_info)
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;
221 int 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)
228 struct perf_ns_link_info *ns_link_info;
230 if (!tool || !tool->namespace_events)
233 memset(&event->namespaces, 0, (sizeof(event->namespaces) +
234 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
235 machine->id_hdr_size));
237 event->namespaces.pid = tgid;
238 event->namespaces.tid = pid;
240 event->namespaces.nr_namespaces = NR_NAMESPACES;
242 ns_link_info = event->namespaces.link_info;
244 for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
245 perf_event__get_ns_link_info(pid, perf_ns__name(idx),
248 event->namespaces.header.type = PERF_RECORD_NAMESPACES;
250 event->namespaces.header.size = (sizeof(event->namespaces) +
251 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
252 machine->id_hdr_size);
254 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
260 static 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)
266 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
269 * for main thread set parent to ppid from status file. For other
270 * threads set parent pid to main thread. ie., assume main thread
271 * spawns all threads in a process
274 event->fork.ppid = ppid;
275 event->fork.ptid = ppid;
277 event->fork.ppid = tgid;
278 event->fork.ptid = tgid;
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;
285 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
287 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
293 static bool read_proc_maps_line(struct io *io, __u64 *start, __u64 *end,
294 u32 *prot, u32 *flags, __u64 *offset,
297 ssize_t pathname_size, char *pathname)
301 char *start_pathname = pathname;
303 if (io__get_hex(io, start) != '-')
305 if (io__get_hex(io, end) != ' ')
308 /* map protection and flags bits */
310 ch = io__get_char(io);
315 ch = io__get_char(io);
320 ch = io__get_char(io);
325 ch = io__get_char(io);
329 *flags = MAP_PRIVATE;
332 if (io__get_char(io) != ' ')
335 if (io__get_hex(io, offset) != ' ')
338 if (io__get_hex(io, &temp) != ':')
341 if (io__get_hex(io, &temp) != ' ')
345 ch = io__get_dec(io, inode);
351 ch = io__get_char(io);
356 if (ch == '\0' || ch == '\n' ||
357 (pathname + 1 - start_pathname) >= pathname_size) {
362 ch = io__get_char(io);
366 static void perf_record_mmap2__read_build_id(struct perf_record_mmap2 *event,
373 rc = sysfs__read_build_id("/sys/kernel/notes", &bid);
375 rc = filename__read_build_id(event->filename, &bid) > 0 ? 0 : -1;
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;
384 if (event->filename[0] == '/') {
385 pr_debug2("Failed to read build ID for %s\n",
391 int 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,
398 unsigned long long t;
401 bool truncation = false;
402 unsigned long long timeout = proc_map_timeout * 1000000ULL;
404 const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
405 int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
407 if (machine__is_default_guest(machine))
410 snprintf(bf, sizeof(bf), "%s/proc/%d/task/%d/maps",
411 machine->root_dir, pid, pid);
413 io.fd = open(bf, O_RDONLY, 0);
416 * We raced with a task exiting - just return:
418 pr_debug("couldn't open %s\n", bf);
421 io__init(&io, io.fd, bf, sizeof(bf));
423 event->header.type = PERF_RECORD_MMAP2;
427 static const char anonstr[] = "//anon";
428 size_t size, aligned_size;
430 /* ensure null termination since stack will be reused. */
431 event->mmap2.filename[0] = '\0';
433 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
434 if (!read_proc_maps_line(&io,
443 sizeof(event->mmap2.filename),
444 event->mmap2.filename))
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);
456 event->mmap2.ino_generation = 0;
459 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
461 if (machine__is_host(machine))
462 event->header.misc = PERF_RECORD_MISC_USER;
464 event->header.misc = PERF_RECORD_MISC_GUEST_USER;
466 if ((event->mmap2.prot & PROT_EXEC) == 0) {
467 if (!mmap_data || (event->mmap2.prot & PROT_READ) == 0)
470 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
475 event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
477 if (!strcmp(event->mmap2.filename, ""))
478 strcpy(event->mmap2.filename, anonstr);
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;
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;
498 if (symbol_conf.buildid_mmap2)
499 perf_record_mmap2__read_build_id(&event->mmap2, false);
501 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
514 #ifdef HAVE_FILE_HANDLE
515 static 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)
521 size_t event_size = sizeof(event->cgroup) - sizeof(event->cgroup.path);
522 size_t path_len = strlen(path) - mount_len + 1;
524 struct file_handle fh;
529 while (path_len % sizeof(u64))
530 path[mount_len + path_len++] = '\0';
532 memset(&event->cgroup, 0, event_size);
534 event->cgroup.header.type = PERF_RECORD_CGROUP;
535 event->cgroup.header.size = event_size + path_len + machine->id_hdr_size;
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);
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);
547 if (perf_tool__process_synth_event(tool, event, machine, process) < 0) {
548 pr_debug("process synth event failed\n");
555 static 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)
561 size_t pos = strlen(path);
566 if (perf_event__synthesize_cgroup(tool, event, path, mount_len,
567 process, machine) < 0)
572 pr_debug("failed to open directory: %s\n", path);
576 while ((dent = readdir(d)) != NULL) {
577 if (dent->d_type != DT_DIR)
579 if (!strcmp(dent->d_name, ".") ||
580 !strcmp(dent->d_name, ".."))
583 /* any sane path should be less than PATH_MAX */
584 if (strlen(path) + strlen(dent->d_name) + 1 >= PATH_MAX)
587 if (path[pos - 1] != '/')
589 strcat(path, dent->d_name);
591 ret = perf_event__walk_cgroup_tree(tool, event, path,
592 mount_len, process, machine);
603 int perf_event__synthesize_cgroups(struct perf_tool *tool,
604 perf_event__handler_t process,
605 struct machine *machine)
607 union perf_event event;
608 char cgrp_root[PATH_MAX];
609 size_t mount_len; /* length of mount point in the path */
611 if (!tool || !tool->cgroup_events)
614 if (cgroupfs_find_mountpoint(cgrp_root, PATH_MAX, "perf_event") < 0) {
615 pr_debug("cannot find cgroup mount point\n");
619 mount_len = strlen(cgrp_root);
620 /* make sure the path starts with a slash (after mount point) */
621 strcat(cgrp_root, "/");
623 if (perf_event__walk_cgroup_tree(tool, &event, cgrp_root, mount_len,
624 process, machine) < 0)
630 int perf_event__synthesize_cgroups(struct perf_tool *tool __maybe_unused,
631 perf_event__handler_t process __maybe_unused,
632 struct machine *machine __maybe_unused)
638 int perf_event__synthesize_modules(struct perf_tool *tool, perf_event__handler_t process,
639 struct machine *machine)
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);
648 event = zalloc(size + machine->id_hdr_size);
650 pr_debug("Not enough memory synthesizing mmap event "
651 "for kernel modules\n");
656 * kernel uses 0 for user space maps, see kernel/perf_event.c
659 if (machine__is_host(machine))
660 event->header.misc = PERF_RECORD_MISC_KERNEL;
662 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
664 maps__for_each_entry(maps, pos) {
665 if (!__map__is_kmodule(pos))
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;
679 memcpy(event->mmap2.filename, pos->dso->long_name,
680 pos->dso->long_name_len + 1);
682 perf_record_mmap2__read_build_id(&event->mmap2, false);
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;
694 memcpy(event->mmap.filename, pos->dso->long_name,
695 pos->dso->long_name_len + 1);
698 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
708 static int filter_task(const struct dirent *dirent)
710 return isdigit(dirent->d_name[0]);
713 static 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,
719 bool needs_mmap, bool mmap_data)
721 char filename[PATH_MAX];
722 struct dirent **dirent;
727 /* special case: only send one comm event using passed in pid */
729 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
735 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
736 tgid, process, machine) < 0)
740 * send mmap only for thread group leader
741 * see thread__init_maps()
743 if (pid == tgid && needs_mmap &&
744 perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
745 process, machine, mmap_data))
751 if (machine__is_default_guest(machine))
754 snprintf(filename, sizeof(filename), "%s/proc/%d/task",
755 machine->root_dir, pid);
757 n = scandir(filename, &dirent, filter_task, alphasort);
761 for (i = 0; i < n; i++) {
764 bool kernel_thread = false;
766 _pid = strtol(dirent[i]->d_name, &end, 10);
771 if (perf_event__prepare_comm(comm_event, pid, _pid, machine,
772 &tgid, &ppid, &kernel_thread) != 0)
775 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
776 ppid, process, machine) < 0)
779 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
780 tgid, process, machine) < 0)
784 * Send the prepared comm event
786 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
790 if (_pid == pid && !kernel_thread && needs_mmap) {
791 /* process the parent's maps too */
792 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
793 process, machine, mmap_data);
799 for (i = 0; i < n; i++)
806 int perf_event__synthesize_thread_map(struct perf_tool *tool,
807 struct perf_thread_map *threads,
808 perf_event__handler_t process,
809 struct machine *machine,
810 bool needs_mmap, bool mmap_data)
812 union perf_event *comm_event, *mmap_event, *fork_event;
813 union perf_event *namespaces_event;
814 int err = -1, thread, j;
816 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
817 if (comm_event == NULL)
820 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
821 if (mmap_event == NULL)
824 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
825 if (fork_event == NULL)
828 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
829 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
830 machine->id_hdr_size);
831 if (namespaces_event == NULL)
835 for (thread = 0; thread < threads->nr; ++thread) {
836 if (__event__synthesize_thread(comm_event, mmap_event,
837 fork_event, namespaces_event,
838 perf_thread_map__pid(threads, thread), 0,
839 process, tool, machine,
840 needs_mmap, mmap_data)) {
846 * comm.pid is set to thread group id by
847 * perf_event__synthesize_comm
849 if ((int) comm_event->comm.pid != perf_thread_map__pid(threads, thread)) {
850 bool need_leader = true;
852 /* is thread group leader in thread_map? */
853 for (j = 0; j < threads->nr; ++j) {
854 if ((int) comm_event->comm.pid == perf_thread_map__pid(threads, j)) {
860 /* if not, generate events for it */
862 __event__synthesize_thread(comm_event, mmap_event,
863 fork_event, namespaces_event,
864 comm_event->comm.pid, 0,
865 process, tool, machine,
866 needs_mmap, mmap_data)) {
872 free(namespaces_event);
883 static int __perf_event__synthesize_threads(struct perf_tool *tool,
884 perf_event__handler_t process,
885 struct machine *machine,
888 struct dirent **dirent,
892 union perf_event *comm_event, *mmap_event, *fork_event;
893 union perf_event *namespaces_event;
899 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
900 if (comm_event == NULL)
903 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
904 if (mmap_event == NULL)
907 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
908 if (fork_event == NULL)
911 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
912 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
913 machine->id_hdr_size);
914 if (namespaces_event == NULL)
917 for (i = start; i < start + num; i++) {
918 if (!isdigit(dirent[i]->d_name[0]))
921 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
922 /* only interested in proper numerical dirents */
926 * We may race with exiting thread, so don't stop just because
927 * one thread couldn't be synthesized.
929 __event__synthesize_thread(comm_event, mmap_event, fork_event,
930 namespaces_event, pid, 1, process,
931 tool, machine, needs_mmap, mmap_data);
935 free(namespaces_event);
946 struct synthesize_threads_arg {
947 struct perf_tool *tool;
948 perf_event__handler_t process;
949 struct machine *machine;
952 struct dirent **dirent;
957 static void *synthesize_threads_worker(void *arg)
959 struct synthesize_threads_arg *args = arg;
961 __perf_event__synthesize_threads(args->tool, args->process,
963 args->needs_mmap, args->mmap_data,
965 args->start, args->num);
969 int perf_event__synthesize_threads(struct perf_tool *tool,
970 perf_event__handler_t process,
971 struct machine *machine,
972 bool needs_mmap, bool mmap_data,
973 unsigned int nr_threads_synthesize)
975 struct synthesize_threads_arg *args = NULL;
976 pthread_t *synthesize_threads = NULL;
977 char proc_path[PATH_MAX];
978 struct dirent **dirent;
986 if (machine__is_default_guest(machine))
989 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
990 n = scandir(proc_path, &dirent, filter_task, alphasort);
994 if (nr_threads_synthesize == UINT_MAX)
995 thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
997 thread_nr = nr_threads_synthesize;
999 if (thread_nr <= 1) {
1000 err = __perf_event__synthesize_threads(tool, process,
1002 needs_mmap, mmap_data,
1009 synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
1010 if (synthesize_threads == NULL)
1013 args = calloc(sizeof(*args), thread_nr);
1017 num_per_thread = n / thread_nr;
1019 for (i = 0; i < thread_nr; i++) {
1020 args[i].tool = tool;
1021 args[i].process = process;
1022 args[i].machine = machine;
1023 args[i].needs_mmap = needs_mmap;
1024 args[i].mmap_data = mmap_data;
1025 args[i].dirent = dirent;
1027 for (i = 0; i < m; i++) {
1028 args[i].num = num_per_thread + 1;
1029 args[i].start = i * args[i].num;
1032 base = args[i-1].start + args[i-1].num;
1033 for (j = i; j < thread_nr; j++) {
1034 args[j].num = num_per_thread;
1035 args[j].start = base + (j - i) * args[i].num;
1038 for (i = 0; i < thread_nr; i++) {
1039 if (pthread_create(&synthesize_threads[i], NULL,
1040 synthesize_threads_worker, &args[i]))
1045 for (i = 0; i < thread_nr; i++)
1046 pthread_join(synthesize_threads[i], NULL);
1049 free(synthesize_threads);
1051 for (i = 0; i < n; i++)
1058 int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused,
1059 perf_event__handler_t process __maybe_unused,
1060 struct machine *machine __maybe_unused)
1065 static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
1066 perf_event__handler_t process,
1067 struct machine *machine)
1069 union perf_event *event;
1070 size_t size = symbol_conf.buildid_mmap2 ?
1071 sizeof(event->mmap2) : sizeof(event->mmap);
1072 struct map *map = machine__kernel_map(machine);
1079 kmap = map__kmap(map);
1080 if (!kmap->ref_reloc_sym)
1084 * We should get this from /sys/kernel/sections/.text, but till that is
1085 * available use this, and after it is use this as a fallback for older
1088 event = zalloc(size + machine->id_hdr_size);
1089 if (event == NULL) {
1090 pr_debug("Not enough memory synthesizing mmap event "
1091 "for kernel modules\n");
1095 if (machine__is_host(machine)) {
1097 * kernel uses PERF_RECORD_MISC_USER for user space maps,
1098 * see kernel/perf_event.c __perf_event_mmap
1100 event->header.misc = PERF_RECORD_MISC_KERNEL;
1102 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
1105 if (symbol_conf.buildid_mmap2) {
1106 size = snprintf(event->mmap2.filename, sizeof(event->mmap2.filename),
1107 "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
1108 size = PERF_ALIGN(size, sizeof(u64));
1109 event->mmap2.header.type = PERF_RECORD_MMAP2;
1110 event->mmap2.header.size = (sizeof(event->mmap2) -
1111 (sizeof(event->mmap2.filename) - size) + machine->id_hdr_size);
1112 event->mmap2.pgoff = kmap->ref_reloc_sym->addr;
1113 event->mmap2.start = map->start;
1114 event->mmap2.len = map->end - event->mmap.start;
1115 event->mmap2.pid = machine->pid;
1117 perf_record_mmap2__read_build_id(&event->mmap2, true);
1119 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
1120 "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
1121 size = PERF_ALIGN(size, sizeof(u64));
1122 event->mmap.header.type = PERF_RECORD_MMAP;
1123 event->mmap.header.size = (sizeof(event->mmap) -
1124 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
1125 event->mmap.pgoff = kmap->ref_reloc_sym->addr;
1126 event->mmap.start = map->start;
1127 event->mmap.len = map->end - event->mmap.start;
1128 event->mmap.pid = machine->pid;
1131 err = perf_tool__process_synth_event(tool, event, machine, process);
1137 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
1138 perf_event__handler_t process,
1139 struct machine *machine)
1143 err = __perf_event__synthesize_kernel_mmap(tool, process, machine);
1147 return perf_event__synthesize_extra_kmaps(tool, process, machine);
1150 int perf_event__synthesize_thread_map2(struct perf_tool *tool,
1151 struct perf_thread_map *threads,
1152 perf_event__handler_t process,
1153 struct machine *machine)
1155 union perf_event *event;
1158 size = sizeof(event->thread_map);
1159 size += threads->nr * sizeof(event->thread_map.entries[0]);
1161 event = zalloc(size);
1165 event->header.type = PERF_RECORD_THREAD_MAP;
1166 event->header.size = size;
1167 event->thread_map.nr = threads->nr;
1169 for (i = 0; i < threads->nr; i++) {
1170 struct perf_record_thread_map_entry *entry = &event->thread_map.entries[i];
1171 char *comm = perf_thread_map__comm(threads, i);
1176 entry->pid = perf_thread_map__pid(threads, i);
1177 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
1180 err = process(tool, event, NULL, machine);
1186 static void synthesize_cpus(struct cpu_map_entries *cpus,
1187 struct perf_cpu_map *map)
1189 int i, map_nr = perf_cpu_map__nr(map);
1193 for (i = 0; i < map_nr; i++)
1194 cpus->cpu[i] = perf_cpu_map__cpu(map, i).cpu;
1197 static void synthesize_mask(struct perf_record_record_cpu_map *mask,
1198 struct perf_cpu_map *map, int max)
1202 mask->nr = BITS_TO_LONGS(max);
1203 mask->long_size = sizeof(long);
1205 for (i = 0; i < perf_cpu_map__nr(map); i++)
1206 set_bit(perf_cpu_map__cpu(map, i).cpu, mask->mask);
1209 static size_t cpus_size(struct perf_cpu_map *map)
1211 return sizeof(struct cpu_map_entries) + perf_cpu_map__nr(map) * sizeof(u16);
1214 static size_t mask_size(struct perf_cpu_map *map, int *max)
1220 for (i = 0; i < perf_cpu_map__nr(map); i++) {
1221 /* bit position of the cpu is + 1 */
1222 int bit = perf_cpu_map__cpu(map, i).cpu + 1;
1228 return sizeof(struct perf_record_record_cpu_map) + BITS_TO_LONGS(*max) * sizeof(long);
1231 void *cpu_map_data__alloc(struct perf_cpu_map *map, size_t *size, u16 *type, int *max)
1233 size_t size_cpus, size_mask;
1234 bool is_dummy = perf_cpu_map__empty(map);
1237 * Both array and mask data have variable size based
1238 * on the number of cpus and their actual values.
1239 * The size of the 'struct perf_record_cpu_map_data' is:
1241 * array = size of 'struct cpu_map_entries' +
1242 * number of cpus * sizeof(u64)
1244 * mask = size of 'struct perf_record_record_cpu_map' +
1245 * maximum cpu bit converted to size of longs
1247 * and finally + the size of 'struct perf_record_cpu_map_data'.
1249 size_cpus = cpus_size(map);
1250 size_mask = mask_size(map, max);
1252 if (is_dummy || (size_cpus < size_mask)) {
1254 *type = PERF_CPU_MAP__CPUS;
1257 *type = PERF_CPU_MAP__MASK;
1260 *size += sizeof(struct perf_record_cpu_map_data);
1261 *size = PERF_ALIGN(*size, sizeof(u64));
1262 return zalloc(*size);
1265 void cpu_map_data__synthesize(struct perf_record_cpu_map_data *data, struct perf_cpu_map *map,
1271 case PERF_CPU_MAP__CPUS:
1272 synthesize_cpus((struct cpu_map_entries *) data->data, map);
1274 case PERF_CPU_MAP__MASK:
1275 synthesize_mask((struct perf_record_record_cpu_map *)data->data, map, max);
1281 static struct perf_record_cpu_map *cpu_map_event__new(struct perf_cpu_map *map)
1283 size_t size = sizeof(struct perf_record_cpu_map);
1284 struct perf_record_cpu_map *event;
1288 event = cpu_map_data__alloc(map, &size, &type, &max);
1292 event->header.type = PERF_RECORD_CPU_MAP;
1293 event->header.size = size;
1294 event->data.type = type;
1296 cpu_map_data__synthesize(&event->data, map, type, max);
1300 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
1301 struct perf_cpu_map *map,
1302 perf_event__handler_t process,
1303 struct machine *machine)
1305 struct perf_record_cpu_map *event;
1308 event = cpu_map_event__new(map);
1312 err = process(tool, (union perf_event *) event, NULL, machine);
1318 int perf_event__synthesize_stat_config(struct perf_tool *tool,
1319 struct perf_stat_config *config,
1320 perf_event__handler_t process,
1321 struct machine *machine)
1323 struct perf_record_stat_config *event;
1324 int size, i = 0, err;
1326 size = sizeof(*event);
1327 size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
1329 event = zalloc(size);
1333 event->header.type = PERF_RECORD_STAT_CONFIG;
1334 event->header.size = size;
1335 event->nr = PERF_STAT_CONFIG_TERM__MAX;
1337 #define ADD(__term, __val) \
1338 event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \
1339 event->data[i].val = __val; \
1342 ADD(AGGR_MODE, config->aggr_mode)
1343 ADD(INTERVAL, config->interval)
1344 ADD(SCALE, config->scale)
1346 WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
1347 "stat config terms unbalanced\n");
1350 err = process(tool, (union perf_event *) event, NULL, machine);
1356 int perf_event__synthesize_stat(struct perf_tool *tool,
1357 struct perf_cpu cpu, u32 thread, u64 id,
1358 struct perf_counts_values *count,
1359 perf_event__handler_t process,
1360 struct machine *machine)
1362 struct perf_record_stat event;
1364 event.header.type = PERF_RECORD_STAT;
1365 event.header.size = sizeof(event);
1366 event.header.misc = 0;
1369 event.cpu = cpu.cpu;
1370 event.thread = thread;
1371 event.val = count->val;
1372 event.ena = count->ena;
1373 event.run = count->run;
1375 return process(tool, (union perf_event *) &event, NULL, machine);
1378 int perf_event__synthesize_stat_round(struct perf_tool *tool,
1379 u64 evtime, u64 type,
1380 perf_event__handler_t process,
1381 struct machine *machine)
1383 struct perf_record_stat_round event;
1385 event.header.type = PERF_RECORD_STAT_ROUND;
1386 event.header.size = sizeof(event);
1387 event.header.misc = 0;
1389 event.time = evtime;
1392 return process(tool, (union perf_event *) &event, NULL, machine);
1395 size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type, u64 read_format)
1397 size_t sz, result = sizeof(struct perf_record_sample);
1399 if (type & PERF_SAMPLE_IDENTIFIER)
1400 result += sizeof(u64);
1402 if (type & PERF_SAMPLE_IP)
1403 result += sizeof(u64);
1405 if (type & PERF_SAMPLE_TID)
1406 result += sizeof(u64);
1408 if (type & PERF_SAMPLE_TIME)
1409 result += sizeof(u64);
1411 if (type & PERF_SAMPLE_ADDR)
1412 result += sizeof(u64);
1414 if (type & PERF_SAMPLE_ID)
1415 result += sizeof(u64);
1417 if (type & PERF_SAMPLE_STREAM_ID)
1418 result += sizeof(u64);
1420 if (type & PERF_SAMPLE_CPU)
1421 result += sizeof(u64);
1423 if (type & PERF_SAMPLE_PERIOD)
1424 result += sizeof(u64);
1426 if (type & PERF_SAMPLE_READ) {
1427 result += sizeof(u64);
1428 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1429 result += sizeof(u64);
1430 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1431 result += sizeof(u64);
1432 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1433 if (read_format & PERF_FORMAT_GROUP) {
1434 sz = sample->read.group.nr *
1435 sizeof(struct sample_read_value);
1438 result += sizeof(u64);
1442 if (type & PERF_SAMPLE_CALLCHAIN) {
1443 sz = (sample->callchain->nr + 1) * sizeof(u64);
1447 if (type & PERF_SAMPLE_RAW) {
1448 result += sizeof(u32);
1449 result += sample->raw_size;
1452 if (type & PERF_SAMPLE_BRANCH_STACK) {
1453 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
1455 sz += 2 * sizeof(u64);
1459 if (type & PERF_SAMPLE_REGS_USER) {
1460 if (sample->user_regs.abi) {
1461 result += sizeof(u64);
1462 sz = hweight64(sample->user_regs.mask) * sizeof(u64);
1465 result += sizeof(u64);
1469 if (type & PERF_SAMPLE_STACK_USER) {
1470 sz = sample->user_stack.size;
1471 result += sizeof(u64);
1474 result += sizeof(u64);
1478 if (type & PERF_SAMPLE_WEIGHT_TYPE)
1479 result += sizeof(u64);
1481 if (type & PERF_SAMPLE_DATA_SRC)
1482 result += sizeof(u64);
1484 if (type & PERF_SAMPLE_TRANSACTION)
1485 result += sizeof(u64);
1487 if (type & PERF_SAMPLE_REGS_INTR) {
1488 if (sample->intr_regs.abi) {
1489 result += sizeof(u64);
1490 sz = hweight64(sample->intr_regs.mask) * sizeof(u64);
1493 result += sizeof(u64);
1497 if (type & PERF_SAMPLE_PHYS_ADDR)
1498 result += sizeof(u64);
1500 if (type & PERF_SAMPLE_CGROUP)
1501 result += sizeof(u64);
1503 if (type & PERF_SAMPLE_DATA_PAGE_SIZE)
1504 result += sizeof(u64);
1506 if (type & PERF_SAMPLE_CODE_PAGE_SIZE)
1507 result += sizeof(u64);
1509 if (type & PERF_SAMPLE_AUX) {
1510 result += sizeof(u64);
1511 result += sample->aux_sample.size;
1517 void __weak arch_perf_synthesize_sample_weight(const struct perf_sample *data,
1518 __u64 *array, u64 type __maybe_unused)
1520 *array = data->weight;
1523 int perf_event__synthesize_sample(union perf_event *event, u64 type, u64 read_format,
1524 const struct perf_sample *sample)
1529 * used for cross-endian analysis. See git commit 65014ab3
1530 * for why this goofiness is needed.
1534 array = event->sample.array;
1536 if (type & PERF_SAMPLE_IDENTIFIER) {
1537 *array = sample->id;
1541 if (type & PERF_SAMPLE_IP) {
1542 *array = sample->ip;
1546 if (type & PERF_SAMPLE_TID) {
1547 u.val32[0] = sample->pid;
1548 u.val32[1] = sample->tid;
1553 if (type & PERF_SAMPLE_TIME) {
1554 *array = sample->time;
1558 if (type & PERF_SAMPLE_ADDR) {
1559 *array = sample->addr;
1563 if (type & PERF_SAMPLE_ID) {
1564 *array = sample->id;
1568 if (type & PERF_SAMPLE_STREAM_ID) {
1569 *array = sample->stream_id;
1573 if (type & PERF_SAMPLE_CPU) {
1574 u.val32[0] = sample->cpu;
1580 if (type & PERF_SAMPLE_PERIOD) {
1581 *array = sample->period;
1585 if (type & PERF_SAMPLE_READ) {
1586 if (read_format & PERF_FORMAT_GROUP)
1587 *array = sample->read.group.nr;
1589 *array = sample->read.one.value;
1592 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
1593 *array = sample->read.time_enabled;
1597 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
1598 *array = sample->read.time_running;
1602 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1603 if (read_format & PERF_FORMAT_GROUP) {
1604 sz = sample->read.group.nr *
1605 sizeof(struct sample_read_value);
1606 memcpy(array, sample->read.group.values, sz);
1607 array = (void *)array + sz;
1609 *array = sample->read.one.id;
1614 if (type & PERF_SAMPLE_CALLCHAIN) {
1615 sz = (sample->callchain->nr + 1) * sizeof(u64);
1616 memcpy(array, sample->callchain, sz);
1617 array = (void *)array + sz;
1620 if (type & PERF_SAMPLE_RAW) {
1621 u.val32[0] = sample->raw_size;
1623 array = (void *)array + sizeof(u32);
1625 memcpy(array, sample->raw_data, sample->raw_size);
1626 array = (void *)array + sample->raw_size;
1629 if (type & PERF_SAMPLE_BRANCH_STACK) {
1630 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
1632 sz += 2 * sizeof(u64);
1633 memcpy(array, sample->branch_stack, sz);
1634 array = (void *)array + sz;
1637 if (type & PERF_SAMPLE_REGS_USER) {
1638 if (sample->user_regs.abi) {
1639 *array++ = sample->user_regs.abi;
1640 sz = hweight64(sample->user_regs.mask) * sizeof(u64);
1641 memcpy(array, sample->user_regs.regs, sz);
1642 array = (void *)array + sz;
1648 if (type & PERF_SAMPLE_STACK_USER) {
1649 sz = sample->user_stack.size;
1652 memcpy(array, sample->user_stack.data, sz);
1653 array = (void *)array + sz;
1658 if (type & PERF_SAMPLE_WEIGHT_TYPE) {
1659 arch_perf_synthesize_sample_weight(sample, array, type);
1663 if (type & PERF_SAMPLE_DATA_SRC) {
1664 *array = sample->data_src;
1668 if (type & PERF_SAMPLE_TRANSACTION) {
1669 *array = sample->transaction;
1673 if (type & PERF_SAMPLE_REGS_INTR) {
1674 if (sample->intr_regs.abi) {
1675 *array++ = sample->intr_regs.abi;
1676 sz = hweight64(sample->intr_regs.mask) * sizeof(u64);
1677 memcpy(array, sample->intr_regs.regs, sz);
1678 array = (void *)array + sz;
1684 if (type & PERF_SAMPLE_PHYS_ADDR) {
1685 *array = sample->phys_addr;
1689 if (type & PERF_SAMPLE_CGROUP) {
1690 *array = sample->cgroup;
1694 if (type & PERF_SAMPLE_DATA_PAGE_SIZE) {
1695 *array = sample->data_page_size;
1699 if (type & PERF_SAMPLE_CODE_PAGE_SIZE) {
1700 *array = sample->code_page_size;
1704 if (type & PERF_SAMPLE_AUX) {
1705 sz = sample->aux_sample.size;
1707 memcpy(array, sample->aux_sample.data, sz);
1708 array = (void *)array + sz;
1714 int perf_event__synthesize_id_index(struct perf_tool *tool, perf_event__handler_t process,
1715 struct evlist *evlist, struct machine *machine)
1717 union perf_event *ev;
1718 struct evsel *evsel;
1719 size_t nr = 0, i = 0, sz, max_nr, n;
1722 pr_debug2("Synthesizing id index\n");
1724 max_nr = (UINT16_MAX - sizeof(struct perf_record_id_index)) /
1725 sizeof(struct id_index_entry);
1727 evlist__for_each_entry(evlist, evsel)
1728 nr += evsel->core.ids;
1730 n = nr > max_nr ? max_nr : nr;
1731 sz = sizeof(struct perf_record_id_index) + n * sizeof(struct id_index_entry);
1736 ev->id_index.header.type = PERF_RECORD_ID_INDEX;
1737 ev->id_index.header.size = sz;
1738 ev->id_index.nr = n;
1740 evlist__for_each_entry(evlist, evsel) {
1743 for (j = 0; j < evsel->core.ids; j++) {
1744 struct id_index_entry *e;
1745 struct perf_sample_id *sid;
1748 err = process(tool, ev, NULL, machine);
1755 e = &ev->id_index.entries[i++];
1757 e->id = evsel->core.id[j];
1759 sid = evlist__id2sid(evlist, e->id);
1766 e->cpu = sid->cpu.cpu;
1771 sz = sizeof(struct perf_record_id_index) + nr * sizeof(struct id_index_entry);
1772 ev->id_index.header.size = sz;
1773 ev->id_index.nr = nr;
1775 err = process(tool, ev, NULL, machine);
1782 int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
1783 struct target *target, struct perf_thread_map *threads,
1784 perf_event__handler_t process, bool needs_mmap,
1785 bool data_mmap, unsigned int nr_threads_synthesize)
1788 * When perf runs in non-root PID namespace, and the namespace's proc FS
1789 * is not mounted, nsinfo__is_in_root_namespace() returns false.
1790 * In this case, the proc FS is coming for the parent namespace, thus
1791 * perf tool will wrongly gather process info from its parent PID
1794 * To avoid the confusion that the perf tool runs in a child PID
1795 * namespace but it synthesizes thread info from its parent PID
1796 * namespace, returns failure with warning.
1798 if (!nsinfo__is_in_root_namespace()) {
1799 pr_err("Perf runs in non-root PID namespace but it tries to ");
1800 pr_err("gather process info from its parent PID namespace.\n");
1801 pr_err("Please mount the proc file system properly, e.g. ");
1802 pr_err("add the option '--mount-proc' for unshare command.\n");
1806 if (target__has_task(target))
1807 return perf_event__synthesize_thread_map(tool, threads, process, machine,
1808 needs_mmap, data_mmap);
1809 else if (target__has_cpu(target))
1810 return perf_event__synthesize_threads(tool, process, machine,
1811 needs_mmap, data_mmap,
1812 nr_threads_synthesize);
1813 /* command specified */
1817 int machine__synthesize_threads(struct machine *machine, struct target *target,
1818 struct perf_thread_map *threads, bool needs_mmap,
1819 bool data_mmap, unsigned int nr_threads_synthesize)
1821 return __machine__synthesize_threads(machine, NULL, target, threads,
1822 perf_event__process, needs_mmap,
1823 data_mmap, nr_threads_synthesize);
1826 static struct perf_record_event_update *event_update_event__new(size_t size, u64 type, u64 id)
1828 struct perf_record_event_update *ev;
1830 size += sizeof(*ev);
1831 size = PERF_ALIGN(size, sizeof(u64));
1835 ev->header.type = PERF_RECORD_EVENT_UPDATE;
1836 ev->header.size = (u16)size;
1843 int perf_event__synthesize_event_update_unit(struct perf_tool *tool, struct evsel *evsel,
1844 perf_event__handler_t process)
1846 size_t size = strlen(evsel->unit);
1847 struct perf_record_event_update *ev;
1850 ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->core.id[0]);
1854 strlcpy(ev->data, evsel->unit, size + 1);
1855 err = process(tool, (union perf_event *)ev, NULL, NULL);
1860 int perf_event__synthesize_event_update_scale(struct perf_tool *tool, struct evsel *evsel,
1861 perf_event__handler_t process)
1863 struct perf_record_event_update *ev;
1864 struct perf_record_event_update_scale *ev_data;
1867 ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->core.id[0]);
1871 ev_data = (struct perf_record_event_update_scale *)ev->data;
1872 ev_data->scale = evsel->scale;
1873 err = process(tool, (union perf_event *)ev, NULL, NULL);
1878 int perf_event__synthesize_event_update_name(struct perf_tool *tool, struct evsel *evsel,
1879 perf_event__handler_t process)
1881 struct perf_record_event_update *ev;
1882 size_t len = strlen(evsel->name);
1885 ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->core.id[0]);
1889 strlcpy(ev->data, evsel->name, len + 1);
1890 err = process(tool, (union perf_event *)ev, NULL, NULL);
1895 int perf_event__synthesize_event_update_cpus(struct perf_tool *tool, struct evsel *evsel,
1896 perf_event__handler_t process)
1898 size_t size = sizeof(struct perf_record_event_update);
1899 struct perf_record_event_update *ev;
1903 if (!evsel->core.own_cpus)
1906 ev = cpu_map_data__alloc(evsel->core.own_cpus, &size, &type, &max);
1910 ev->header.type = PERF_RECORD_EVENT_UPDATE;
1911 ev->header.size = (u16)size;
1912 ev->type = PERF_EVENT_UPDATE__CPUS;
1913 ev->id = evsel->core.id[0];
1915 cpu_map_data__synthesize((struct perf_record_cpu_map_data *)ev->data,
1916 evsel->core.own_cpus, type, max);
1918 err = process(tool, (union perf_event *)ev, NULL, NULL);
1923 int perf_event__synthesize_attrs(struct perf_tool *tool, struct evlist *evlist,
1924 perf_event__handler_t process)
1926 struct evsel *evsel;
1929 evlist__for_each_entry(evlist, evsel) {
1930 err = perf_event__synthesize_attr(tool, &evsel->core.attr, evsel->core.ids,
1931 evsel->core.id, process);
1933 pr_debug("failed to create perf header attribute\n");
1941 static bool has_unit(struct evsel *evsel)
1943 return evsel->unit && *evsel->unit;
1946 static bool has_scale(struct evsel *evsel)
1948 return evsel->scale != 1;
1951 int perf_event__synthesize_extra_attr(struct perf_tool *tool, struct evlist *evsel_list,
1952 perf_event__handler_t process, bool is_pipe)
1954 struct evsel *evsel;
1958 * Synthesize other events stuff not carried within
1959 * attr event - unit, scale, name
1961 evlist__for_each_entry(evsel_list, evsel) {
1962 if (!evsel->supported)
1966 * Synthesize unit and scale only if it's defined.
1968 if (has_unit(evsel)) {
1969 err = perf_event__synthesize_event_update_unit(tool, evsel, process);
1971 pr_err("Couldn't synthesize evsel unit.\n");
1976 if (has_scale(evsel)) {
1977 err = perf_event__synthesize_event_update_scale(tool, evsel, process);
1979 pr_err("Couldn't synthesize evsel evsel.\n");
1984 if (evsel->core.own_cpus) {
1985 err = perf_event__synthesize_event_update_cpus(tool, evsel, process);
1987 pr_err("Couldn't synthesize evsel cpus.\n");
1993 * Name is needed only for pipe output,
1994 * perf.data carries event names.
1997 err = perf_event__synthesize_event_update_name(tool, evsel, process);
1999 pr_err("Couldn't synthesize evsel name.\n");
2007 int perf_event__synthesize_attr(struct perf_tool *tool, struct perf_event_attr *attr,
2008 u32 ids, u64 *id, perf_event__handler_t process)
2010 union perf_event *ev;
2014 size = sizeof(struct perf_event_attr);
2015 size = PERF_ALIGN(size, sizeof(u64));
2016 size += sizeof(struct perf_event_header);
2017 size += ids * sizeof(u64);
2024 ev->attr.attr = *attr;
2025 memcpy(ev->attr.id, id, ids * sizeof(u64));
2027 ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
2028 ev->attr.header.size = (u16)size;
2030 if (ev->attr.header.size == size)
2031 err = process(tool, ev, NULL, NULL);
2040 int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd, struct evlist *evlist,
2041 perf_event__handler_t process)
2043 union perf_event ev;
2044 struct tracing_data *tdata;
2045 ssize_t size = 0, aligned_size = 0, padding;
2049 * We are going to store the size of the data followed
2050 * by the data contents. Since the fd descriptor is a pipe,
2051 * we cannot seek back to store the size of the data once
2052 * we know it. Instead we:
2054 * - write the tracing data to the temp file
2055 * - get/write the data size to pipe
2056 * - write the tracing data from the temp file
2059 tdata = tracing_data_get(&evlist->core.entries, fd, true);
2063 memset(&ev, 0, sizeof(ev));
2065 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
2067 aligned_size = PERF_ALIGN(size, sizeof(u64));
2068 padding = aligned_size - size;
2069 ev.tracing_data.header.size = sizeof(ev.tracing_data);
2070 ev.tracing_data.size = aligned_size;
2072 process(tool, &ev, NULL, NULL);
2075 * The put function will copy all the tracing data
2076 * stored in temp file to the pipe.
2078 tracing_data_put(tdata);
2080 ff = (struct feat_fd){ .fd = fd };
2081 if (write_padded(&ff, NULL, 0, padding))
2084 return aligned_size;
2087 int perf_event__synthesize_build_id(struct perf_tool *tool, struct dso *pos, u16 misc,
2088 perf_event__handler_t process, struct machine *machine)
2090 union perf_event ev;
2096 memset(&ev, 0, sizeof(ev));
2098 len = pos->long_name_len + 1;
2099 len = PERF_ALIGN(len, NAME_ALIGN);
2100 memcpy(&ev.build_id.build_id, pos->bid.data, sizeof(pos->bid.data));
2101 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
2102 ev.build_id.header.misc = misc;
2103 ev.build_id.pid = machine->pid;
2104 ev.build_id.header.size = sizeof(ev.build_id) + len;
2105 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
2107 return process(tool, &ev, NULL, machine);
2110 int perf_event__synthesize_stat_events(struct perf_stat_config *config, struct perf_tool *tool,
2111 struct evlist *evlist, perf_event__handler_t process, bool attrs)
2116 err = perf_event__synthesize_attrs(tool, evlist, process);
2118 pr_err("Couldn't synthesize attrs.\n");
2123 err = perf_event__synthesize_extra_attr(tool, evlist, process, attrs);
2124 err = perf_event__synthesize_thread_map2(tool, evlist->core.threads, process, NULL);
2126 pr_err("Couldn't synthesize thread map.\n");
2130 err = perf_event__synthesize_cpu_map(tool, evlist->core.user_requested_cpus, process, NULL);
2132 pr_err("Couldn't synthesize thread map.\n");
2136 err = perf_event__synthesize_stat_config(tool, config, process, NULL);
2138 pr_err("Couldn't synthesize config.\n");
2145 extern const struct perf_header_feature_ops feat_ops[HEADER_LAST_FEATURE];
2147 int perf_event__synthesize_features(struct perf_tool *tool, struct perf_session *session,
2148 struct evlist *evlist, perf_event__handler_t process)
2150 struct perf_header *header = &session->header;
2151 struct perf_record_header_feature *fe;
2156 sz_hdr = sizeof(fe->header);
2157 sz = sizeof(union perf_event);
2158 /* get a nice alignment */
2159 sz = PERF_ALIGN(sz, page_size);
2161 memset(&ff, 0, sizeof(ff));
2163 ff.buf = malloc(sz);
2167 ff.size = sz - sz_hdr;
2168 ff.ph = &session->header;
2170 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
2171 if (!feat_ops[feat].synthesize) {
2172 pr_debug("No record header feature for header :%d\n", feat);
2176 ff.offset = sizeof(*fe);
2178 ret = feat_ops[feat].write(&ff, evlist);
2179 if (ret || ff.offset <= (ssize_t)sizeof(*fe)) {
2180 pr_debug("Error writing feature\n");
2183 /* ff.buf may have changed due to realloc in do_write() */
2185 memset(fe, 0, sizeof(*fe));
2188 fe->header.type = PERF_RECORD_HEADER_FEATURE;
2189 fe->header.size = ff.offset;
2191 ret = process(tool, ff.buf, NULL, NULL);
2198 /* Send HEADER_LAST_FEATURE mark. */
2200 fe->feat_id = HEADER_LAST_FEATURE;
2201 fe->header.type = PERF_RECORD_HEADER_FEATURE;
2202 fe->header.size = sizeof(*fe);
2204 ret = process(tool, ff.buf, NULL, NULL);
2210 int perf_event__synthesize_for_pipe(struct perf_tool *tool,
2211 struct perf_session *session,
2212 struct perf_data *data,
2213 perf_event__handler_t process)
2217 struct evlist *evlist = session->evlist;
2220 * We need to synthesize events first, because some
2221 * features works on top of them (on report side).
2223 err = perf_event__synthesize_attrs(tool, evlist, process);
2225 pr_err("Couldn't synthesize attrs.\n");
2230 err = perf_event__synthesize_features(tool, session, evlist, process);
2232 pr_err("Couldn't synthesize features.\n");
2237 if (have_tracepoints(&evlist->core.entries)) {
2238 int fd = perf_data__fd(data);
2241 * FIXME err <= 0 here actually means that
2242 * there were no tracepoints so its not really
2243 * an error, just that we don't need to
2244 * synthesize anything. We really have to
2245 * return this more properly and also
2246 * propagate errors that now are calling die()
2248 err = perf_event__synthesize_tracing_data(tool, fd, evlist,
2251 pr_err("Couldn't record tracing data.\n");
2260 int parse_synth_opt(char *synth)
2268 for (q = synth; (p = strsep(&q, ",")); p = q) {
2269 if (!strcasecmp(p, "no") || !strcasecmp(p, "none"))
2272 if (!strcasecmp(p, "all"))
2273 return PERF_SYNTH_ALL;
2275 if (!strcasecmp(p, "task"))
2276 ret |= PERF_SYNTH_TASK;
2277 else if (!strcasecmp(p, "mmap"))
2278 ret |= PERF_SYNTH_TASK | PERF_SYNTH_MMAP;
2279 else if (!strcasecmp(p, "cgroup"))
2280 ret |= PERF_SYNTH_CGROUP;