1 // SPDX-License-Identifier: GPL-2.0-only
3 #include "util/debug.h"
5 #include "util/event.h"
6 #include "util/evlist.h"
7 #include "util/machine.h"
9 #include "util/map_symbol.h"
10 #include "util/branch.h"
11 #include "util/memswap.h"
12 #include "util/namespaces.h"
13 #include "util/session.h"
14 #include "util/stat.h"
15 #include "util/symbol.h"
16 #include "util/synthetic-events.h"
17 #include "util/target.h"
18 #include "util/time-utils.h"
19 #include <linux/bitops.h>
20 #include <linux/kernel.h>
21 #include <linux/string.h>
22 #include <linux/zalloc.h>
23 #include <linux/perf_event.h>
25 #include <perf/evsel.h>
26 #include <internal/cpumap.h>
27 #include <perf/cpumap.h>
28 #include <internal/lib.h> // page_size
29 #include <internal/threadmap.h>
30 #include <perf/threadmap.h>
31 #include <symbol/kallsyms.h>
37 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
38 #include <api/fs/fs.h>
39 #include <sys/types.h>
44 #define DEFAULT_PROC_MAP_PARSE_TIMEOUT 500
46 unsigned int proc_map_timeout = DEFAULT_PROC_MAP_PARSE_TIMEOUT;
48 int perf_tool__process_synth_event(struct perf_tool *tool,
49 union perf_event *event,
50 struct machine *machine,
51 perf_event__handler_t process)
53 struct perf_sample synth_sample = {
60 .cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
63 return process(tool, event, &synth_sample, machine);
67 * Assumes that the first 4095 bytes of /proc/pid/stat contains
68 * the comm, tgid and ppid.
70 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
71 pid_t *tgid, pid_t *ppid)
73 char filename[PATH_MAX];
78 char *name, *tgids, *ppids;
83 snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
85 fd = open(filename, O_RDONLY);
87 pr_debug("couldn't open %s\n", filename);
91 n = read(fd, bf, sizeof(bf) - 1);
94 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
100 name = strstr(bf, "Name:");
101 tgids = strstr(bf, "Tgid:");
102 ppids = strstr(bf, "PPid:");
107 name = skip_spaces(name + 5); /* strlen("Name:") */
108 nl = strchr(name, '\n');
115 memcpy(comm, name, size);
118 pr_debug("Name: string not found for pid %d\n", pid);
122 tgids += 5; /* strlen("Tgid:") */
125 pr_debug("Tgid: string not found for pid %d\n", pid);
129 ppids += 5; /* strlen("PPid:") */
132 pr_debug("PPid: string not found for pid %d\n", pid);
138 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
139 struct machine *machine,
140 pid_t *tgid, pid_t *ppid)
146 memset(&event->comm, 0, sizeof(event->comm));
148 if (machine__is_host(machine)) {
149 if (perf_event__get_comm_ids(pid, event->comm.comm,
150 sizeof(event->comm.comm),
155 *tgid = machine->pid;
161 event->comm.pid = *tgid;
162 event->comm.header.type = PERF_RECORD_COMM;
164 size = strlen(event->comm.comm) + 1;
165 size = PERF_ALIGN(size, sizeof(u64));
166 memset(event->comm.comm + size, 0, machine->id_hdr_size);
167 event->comm.header.size = (sizeof(event->comm) -
168 (sizeof(event->comm.comm) - size) +
169 machine->id_hdr_size);
170 event->comm.tid = pid;
175 pid_t perf_event__synthesize_comm(struct perf_tool *tool,
176 union perf_event *event, pid_t pid,
177 perf_event__handler_t process,
178 struct machine *machine)
182 if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
185 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
191 static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
192 struct perf_ns_link_info *ns_link_info)
197 sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
198 if (stat64(proc_ns, &st) == 0) {
199 ns_link_info->dev = st.st_dev;
200 ns_link_info->ino = st.st_ino;
204 int perf_event__synthesize_namespaces(struct perf_tool *tool,
205 union perf_event *event,
206 pid_t pid, pid_t tgid,
207 perf_event__handler_t process,
208 struct machine *machine)
211 struct perf_ns_link_info *ns_link_info;
213 if (!tool || !tool->namespace_events)
216 memset(&event->namespaces, 0, (sizeof(event->namespaces) +
217 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
218 machine->id_hdr_size));
220 event->namespaces.pid = tgid;
221 event->namespaces.tid = pid;
223 event->namespaces.nr_namespaces = NR_NAMESPACES;
225 ns_link_info = event->namespaces.link_info;
227 for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
228 perf_event__get_ns_link_info(pid, perf_ns__name(idx),
231 event->namespaces.header.type = PERF_RECORD_NAMESPACES;
233 event->namespaces.header.size = (sizeof(event->namespaces) +
234 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
235 machine->id_hdr_size);
237 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
243 static int perf_event__synthesize_fork(struct perf_tool *tool,
244 union perf_event *event,
245 pid_t pid, pid_t tgid, pid_t ppid,
246 perf_event__handler_t process,
247 struct machine *machine)
249 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
252 * for main thread set parent to ppid from status file. For other
253 * threads set parent pid to main thread. ie., assume main thread
254 * spawns all threads in a process
257 event->fork.ppid = ppid;
258 event->fork.ptid = ppid;
260 event->fork.ppid = tgid;
261 event->fork.ptid = tgid;
263 event->fork.pid = tgid;
264 event->fork.tid = pid;
265 event->fork.header.type = PERF_RECORD_FORK;
266 event->fork.header.misc = PERF_RECORD_MISC_FORK_EXEC;
268 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
270 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
276 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
277 union perf_event *event,
278 pid_t pid, pid_t tgid,
279 perf_event__handler_t process,
280 struct machine *machine,
283 char filename[PATH_MAX];
285 unsigned long long t;
286 bool truncation = false;
287 unsigned long long timeout = proc_map_timeout * 1000000ULL;
289 const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
290 int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
292 if (machine__is_default_guest(machine))
295 snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps",
296 machine->root_dir, pid, pid);
298 fp = fopen(filename, "r");
301 * We raced with a task exiting - just return:
303 pr_debug("couldn't open %s\n", filename);
307 event->header.type = PERF_RECORD_MMAP2;
313 char execname[PATH_MAX];
314 char anonstr[] = "//anon";
319 if (fgets(bf, sizeof(bf), fp) == NULL)
322 if ((rdclock() - t) > timeout) {
323 pr_warning("Reading %s time out. "
324 "You may want to increase "
325 "the time limit by --proc-map-timeout\n",
331 /* ensure null termination since stack will be reused. */
332 strcpy(execname, "");
334 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
335 n = sscanf(bf, "%"PRI_lx64"-%"PRI_lx64" %s %"PRI_lx64" %x:%x %u %[^\n]\n",
336 &event->mmap2.start, &event->mmap2.len, prot,
337 &event->mmap2.pgoff, &event->mmap2.maj,
342 * Anon maps don't have the execname.
347 event->mmap2.ino = (u64)ino;
350 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
352 if (machine__is_host(machine))
353 event->header.misc = PERF_RECORD_MISC_USER;
355 event->header.misc = PERF_RECORD_MISC_GUEST_USER;
357 /* map protection and flags bits */
358 event->mmap2.prot = 0;
359 event->mmap2.flags = 0;
361 event->mmap2.prot |= PROT_READ;
363 event->mmap2.prot |= PROT_WRITE;
365 event->mmap2.prot |= PROT_EXEC;
368 event->mmap2.flags |= MAP_SHARED;
370 event->mmap2.flags |= MAP_PRIVATE;
372 if (prot[2] != 'x') {
373 if (!mmap_data || prot[0] != 'r')
376 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
381 event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
383 if (!strcmp(execname, ""))
384 strcpy(execname, anonstr);
386 if (hugetlbfs_mnt_len &&
387 !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) {
388 strcpy(execname, anonstr);
389 event->mmap2.flags |= MAP_HUGETLB;
392 size = strlen(execname) + 1;
393 memcpy(event->mmap2.filename, execname, size);
394 size = PERF_ALIGN(size, sizeof(u64));
395 event->mmap2.len -= event->mmap.start;
396 event->mmap2.header.size = (sizeof(event->mmap2) -
397 (sizeof(event->mmap2.filename) - size));
398 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
399 event->mmap2.header.size += machine->id_hdr_size;
400 event->mmap2.pid = tgid;
401 event->mmap2.tid = pid;
403 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
416 int perf_event__synthesize_modules(struct perf_tool *tool, perf_event__handler_t process,
417 struct machine *machine)
421 struct maps *maps = machine__kernel_maps(machine);
422 union perf_event *event = zalloc((sizeof(event->mmap) +
423 machine->id_hdr_size));
425 pr_debug("Not enough memory synthesizing mmap event "
426 "for kernel modules\n");
430 event->header.type = PERF_RECORD_MMAP;
433 * kernel uses 0 for user space maps, see kernel/perf_event.c
436 if (machine__is_host(machine))
437 event->header.misc = PERF_RECORD_MISC_KERNEL;
439 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
441 maps__for_each_entry(maps, pos) {
444 if (!__map__is_kmodule(pos))
447 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
448 event->mmap.header.type = PERF_RECORD_MMAP;
449 event->mmap.header.size = (sizeof(event->mmap) -
450 (sizeof(event->mmap.filename) - size));
451 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
452 event->mmap.header.size += machine->id_hdr_size;
453 event->mmap.start = pos->start;
454 event->mmap.len = pos->end - pos->start;
455 event->mmap.pid = machine->pid;
457 memcpy(event->mmap.filename, pos->dso->long_name,
458 pos->dso->long_name_len + 1);
459 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
469 static int __event__synthesize_thread(union perf_event *comm_event,
470 union perf_event *mmap_event,
471 union perf_event *fork_event,
472 union perf_event *namespaces_event,
473 pid_t pid, int full, perf_event__handler_t process,
474 struct perf_tool *tool, struct machine *machine, bool mmap_data)
476 char filename[PATH_MAX];
478 struct dirent *dirent;
482 /* special case: only send one comm event using passed in pid */
484 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
490 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
491 tgid, process, machine) < 0)
495 * send mmap only for thread group leader
496 * see thread__init_maps()
499 perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
500 process, machine, mmap_data))
506 if (machine__is_default_guest(machine))
509 snprintf(filename, sizeof(filename), "%s/proc/%d/task",
510 machine->root_dir, pid);
512 tasks = opendir(filename);
514 pr_debug("couldn't open %s\n", filename);
518 while ((dirent = readdir(tasks)) != NULL) {
522 _pid = strtol(dirent->d_name, &end, 10);
527 if (perf_event__prepare_comm(comm_event, _pid, machine,
531 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
532 ppid, process, machine) < 0)
535 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
536 tgid, process, machine) < 0)
540 * Send the prepared comm event
542 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
547 /* process the parent's maps too */
548 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
549 process, machine, mmap_data);
559 int perf_event__synthesize_thread_map(struct perf_tool *tool,
560 struct perf_thread_map *threads,
561 perf_event__handler_t process,
562 struct machine *machine,
565 union perf_event *comm_event, *mmap_event, *fork_event;
566 union perf_event *namespaces_event;
567 int err = -1, thread, j;
569 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
570 if (comm_event == NULL)
573 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
574 if (mmap_event == NULL)
577 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
578 if (fork_event == NULL)
581 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
582 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
583 machine->id_hdr_size);
584 if (namespaces_event == NULL)
588 for (thread = 0; thread < threads->nr; ++thread) {
589 if (__event__synthesize_thread(comm_event, mmap_event,
590 fork_event, namespaces_event,
591 perf_thread_map__pid(threads, thread), 0,
592 process, tool, machine,
599 * comm.pid is set to thread group id by
600 * perf_event__synthesize_comm
602 if ((int) comm_event->comm.pid != perf_thread_map__pid(threads, thread)) {
603 bool need_leader = true;
605 /* is thread group leader in thread_map? */
606 for (j = 0; j < threads->nr; ++j) {
607 if ((int) comm_event->comm.pid == perf_thread_map__pid(threads, j)) {
613 /* if not, generate events for it */
615 __event__synthesize_thread(comm_event, mmap_event,
616 fork_event, namespaces_event,
617 comm_event->comm.pid, 0,
618 process, tool, machine,
625 free(namespaces_event);
636 static int __perf_event__synthesize_threads(struct perf_tool *tool,
637 perf_event__handler_t process,
638 struct machine *machine,
640 struct dirent **dirent,
644 union perf_event *comm_event, *mmap_event, *fork_event;
645 union perf_event *namespaces_event;
651 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
652 if (comm_event == NULL)
655 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
656 if (mmap_event == NULL)
659 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
660 if (fork_event == NULL)
663 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
664 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
665 machine->id_hdr_size);
666 if (namespaces_event == NULL)
669 for (i = start; i < start + num; i++) {
670 if (!isdigit(dirent[i]->d_name[0]))
673 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
674 /* only interested in proper numerical dirents */
678 * We may race with exiting thread, so don't stop just because
679 * one thread couldn't be synthesized.
681 __event__synthesize_thread(comm_event, mmap_event, fork_event,
682 namespaces_event, pid, 1, process,
683 tool, machine, mmap_data);
687 free(namespaces_event);
698 struct synthesize_threads_arg {
699 struct perf_tool *tool;
700 perf_event__handler_t process;
701 struct machine *machine;
703 struct dirent **dirent;
708 static void *synthesize_threads_worker(void *arg)
710 struct synthesize_threads_arg *args = arg;
712 __perf_event__synthesize_threads(args->tool, args->process,
713 args->machine, args->mmap_data,
715 args->start, args->num);
719 int perf_event__synthesize_threads(struct perf_tool *tool,
720 perf_event__handler_t process,
721 struct machine *machine,
723 unsigned int nr_threads_synthesize)
725 struct synthesize_threads_arg *args = NULL;
726 pthread_t *synthesize_threads = NULL;
727 char proc_path[PATH_MAX];
728 struct dirent **dirent;
736 if (machine__is_default_guest(machine))
739 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
740 n = scandir(proc_path, &dirent, 0, alphasort);
744 if (nr_threads_synthesize == UINT_MAX)
745 thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
747 thread_nr = nr_threads_synthesize;
749 if (thread_nr <= 1) {
750 err = __perf_event__synthesize_threads(tool, process,
758 synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
759 if (synthesize_threads == NULL)
762 args = calloc(sizeof(*args), thread_nr);
766 num_per_thread = n / thread_nr;
768 for (i = 0; i < thread_nr; i++) {
770 args[i].process = process;
771 args[i].machine = machine;
772 args[i].mmap_data = mmap_data;
773 args[i].dirent = dirent;
775 for (i = 0; i < m; i++) {
776 args[i].num = num_per_thread + 1;
777 args[i].start = i * args[i].num;
780 base = args[i-1].start + args[i-1].num;
781 for (j = i; j < thread_nr; j++) {
782 args[j].num = num_per_thread;
783 args[j].start = base + (j - i) * args[i].num;
786 for (i = 0; i < thread_nr; i++) {
787 if (pthread_create(&synthesize_threads[i], NULL,
788 synthesize_threads_worker, &args[i]))
793 for (i = 0; i < thread_nr; i++)
794 pthread_join(synthesize_threads[i], NULL);
797 free(synthesize_threads);
799 for (i = 0; i < n; i++)
806 int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused,
807 perf_event__handler_t process __maybe_unused,
808 struct machine *machine __maybe_unused)
813 static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
814 perf_event__handler_t process,
815 struct machine *machine)
818 struct map *map = machine__kernel_map(machine);
821 union perf_event *event;
826 kmap = map__kmap(map);
827 if (!kmap->ref_reloc_sym)
831 * We should get this from /sys/kernel/sections/.text, but till that is
832 * available use this, and after it is use this as a fallback for older
835 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
837 pr_debug("Not enough memory synthesizing mmap event "
838 "for kernel modules\n");
842 if (machine__is_host(machine)) {
844 * kernel uses PERF_RECORD_MISC_USER for user space maps,
845 * see kernel/perf_event.c __perf_event_mmap
847 event->header.misc = PERF_RECORD_MISC_KERNEL;
849 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
852 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
853 "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
854 size = PERF_ALIGN(size, sizeof(u64));
855 event->mmap.header.type = PERF_RECORD_MMAP;
856 event->mmap.header.size = (sizeof(event->mmap) -
857 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
858 event->mmap.pgoff = kmap->ref_reloc_sym->addr;
859 event->mmap.start = map->start;
860 event->mmap.len = map->end - event->mmap.start;
861 event->mmap.pid = machine->pid;
863 err = perf_tool__process_synth_event(tool, event, machine, process);
869 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
870 perf_event__handler_t process,
871 struct machine *machine)
875 err = __perf_event__synthesize_kernel_mmap(tool, process, machine);
879 return perf_event__synthesize_extra_kmaps(tool, process, machine);
882 int perf_event__synthesize_thread_map2(struct perf_tool *tool,
883 struct perf_thread_map *threads,
884 perf_event__handler_t process,
885 struct machine *machine)
887 union perf_event *event;
890 size = sizeof(event->thread_map);
891 size += threads->nr * sizeof(event->thread_map.entries[0]);
893 event = zalloc(size);
897 event->header.type = PERF_RECORD_THREAD_MAP;
898 event->header.size = size;
899 event->thread_map.nr = threads->nr;
901 for (i = 0; i < threads->nr; i++) {
902 struct perf_record_thread_map_entry *entry = &event->thread_map.entries[i];
903 char *comm = perf_thread_map__comm(threads, i);
908 entry->pid = perf_thread_map__pid(threads, i);
909 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
912 err = process(tool, event, NULL, machine);
918 static void synthesize_cpus(struct cpu_map_entries *cpus,
919 struct perf_cpu_map *map)
925 for (i = 0; i < map->nr; i++)
926 cpus->cpu[i] = map->map[i];
929 static void synthesize_mask(struct perf_record_record_cpu_map *mask,
930 struct perf_cpu_map *map, int max)
934 mask->nr = BITS_TO_LONGS(max);
935 mask->long_size = sizeof(long);
937 for (i = 0; i < map->nr; i++)
938 set_bit(map->map[i], mask->mask);
941 static size_t cpus_size(struct perf_cpu_map *map)
943 return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
946 static size_t mask_size(struct perf_cpu_map *map, int *max)
952 for (i = 0; i < map->nr; i++) {
953 /* bit possition of the cpu is + 1 */
954 int bit = map->map[i] + 1;
960 return sizeof(struct perf_record_record_cpu_map) + BITS_TO_LONGS(*max) * sizeof(long);
963 void *cpu_map_data__alloc(struct perf_cpu_map *map, size_t *size, u16 *type, int *max)
965 size_t size_cpus, size_mask;
966 bool is_dummy = perf_cpu_map__empty(map);
969 * Both array and mask data have variable size based
970 * on the number of cpus and their actual values.
971 * The size of the 'struct perf_record_cpu_map_data' is:
973 * array = size of 'struct cpu_map_entries' +
974 * number of cpus * sizeof(u64)
976 * mask = size of 'struct perf_record_record_cpu_map' +
977 * maximum cpu bit converted to size of longs
979 * and finaly + the size of 'struct perf_record_cpu_map_data'.
981 size_cpus = cpus_size(map);
982 size_mask = mask_size(map, max);
984 if (is_dummy || (size_cpus < size_mask)) {
986 *type = PERF_CPU_MAP__CPUS;
989 *type = PERF_CPU_MAP__MASK;
992 *size += sizeof(struct perf_record_cpu_map_data);
993 *size = PERF_ALIGN(*size, sizeof(u64));
994 return zalloc(*size);
997 void cpu_map_data__synthesize(struct perf_record_cpu_map_data *data, struct perf_cpu_map *map,
1003 case PERF_CPU_MAP__CPUS:
1004 synthesize_cpus((struct cpu_map_entries *) data->data, map);
1006 case PERF_CPU_MAP__MASK:
1007 synthesize_mask((struct perf_record_record_cpu_map *)data->data, map, max);
1013 static struct perf_record_cpu_map *cpu_map_event__new(struct perf_cpu_map *map)
1015 size_t size = sizeof(struct perf_record_cpu_map);
1016 struct perf_record_cpu_map *event;
1020 event = cpu_map_data__alloc(map, &size, &type, &max);
1024 event->header.type = PERF_RECORD_CPU_MAP;
1025 event->header.size = size;
1026 event->data.type = type;
1028 cpu_map_data__synthesize(&event->data, map, type, max);
1032 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
1033 struct perf_cpu_map *map,
1034 perf_event__handler_t process,
1035 struct machine *machine)
1037 struct perf_record_cpu_map *event;
1040 event = cpu_map_event__new(map);
1044 err = process(tool, (union perf_event *) event, NULL, machine);
1050 int perf_event__synthesize_stat_config(struct perf_tool *tool,
1051 struct perf_stat_config *config,
1052 perf_event__handler_t process,
1053 struct machine *machine)
1055 struct perf_record_stat_config *event;
1056 int size, i = 0, err;
1058 size = sizeof(*event);
1059 size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
1061 event = zalloc(size);
1065 event->header.type = PERF_RECORD_STAT_CONFIG;
1066 event->header.size = size;
1067 event->nr = PERF_STAT_CONFIG_TERM__MAX;
1069 #define ADD(__term, __val) \
1070 event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \
1071 event->data[i].val = __val; \
1074 ADD(AGGR_MODE, config->aggr_mode)
1075 ADD(INTERVAL, config->interval)
1076 ADD(SCALE, config->scale)
1078 WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
1079 "stat config terms unbalanced\n");
1082 err = process(tool, (union perf_event *) event, NULL, machine);
1088 int perf_event__synthesize_stat(struct perf_tool *tool,
1089 u32 cpu, u32 thread, u64 id,
1090 struct perf_counts_values *count,
1091 perf_event__handler_t process,
1092 struct machine *machine)
1094 struct perf_record_stat event;
1096 event.header.type = PERF_RECORD_STAT;
1097 event.header.size = sizeof(event);
1098 event.header.misc = 0;
1102 event.thread = thread;
1103 event.val = count->val;
1104 event.ena = count->ena;
1105 event.run = count->run;
1107 return process(tool, (union perf_event *) &event, NULL, machine);
1110 int perf_event__synthesize_stat_round(struct perf_tool *tool,
1111 u64 evtime, u64 type,
1112 perf_event__handler_t process,
1113 struct machine *machine)
1115 struct perf_record_stat_round event;
1117 event.header.type = PERF_RECORD_STAT_ROUND;
1118 event.header.size = sizeof(event);
1119 event.header.misc = 0;
1121 event.time = evtime;
1124 return process(tool, (union perf_event *) &event, NULL, machine);
1127 size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type, u64 read_format)
1129 size_t sz, result = sizeof(struct perf_record_sample);
1131 if (type & PERF_SAMPLE_IDENTIFIER)
1132 result += sizeof(u64);
1134 if (type & PERF_SAMPLE_IP)
1135 result += sizeof(u64);
1137 if (type & PERF_SAMPLE_TID)
1138 result += sizeof(u64);
1140 if (type & PERF_SAMPLE_TIME)
1141 result += sizeof(u64);
1143 if (type & PERF_SAMPLE_ADDR)
1144 result += sizeof(u64);
1146 if (type & PERF_SAMPLE_ID)
1147 result += sizeof(u64);
1149 if (type & PERF_SAMPLE_STREAM_ID)
1150 result += sizeof(u64);
1152 if (type & PERF_SAMPLE_CPU)
1153 result += sizeof(u64);
1155 if (type & PERF_SAMPLE_PERIOD)
1156 result += sizeof(u64);
1158 if (type & PERF_SAMPLE_READ) {
1159 result += sizeof(u64);
1160 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1161 result += sizeof(u64);
1162 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1163 result += sizeof(u64);
1164 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1165 if (read_format & PERF_FORMAT_GROUP) {
1166 sz = sample->read.group.nr *
1167 sizeof(struct sample_read_value);
1170 result += sizeof(u64);
1174 if (type & PERF_SAMPLE_CALLCHAIN) {
1175 sz = (sample->callchain->nr + 1) * sizeof(u64);
1179 if (type & PERF_SAMPLE_RAW) {
1180 result += sizeof(u32);
1181 result += sample->raw_size;
1184 if (type & PERF_SAMPLE_BRANCH_STACK) {
1185 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
1190 if (type & PERF_SAMPLE_REGS_USER) {
1191 if (sample->user_regs.abi) {
1192 result += sizeof(u64);
1193 sz = hweight64(sample->user_regs.mask) * sizeof(u64);
1196 result += sizeof(u64);
1200 if (type & PERF_SAMPLE_STACK_USER) {
1201 sz = sample->user_stack.size;
1202 result += sizeof(u64);
1205 result += sizeof(u64);
1209 if (type & PERF_SAMPLE_WEIGHT)
1210 result += sizeof(u64);
1212 if (type & PERF_SAMPLE_DATA_SRC)
1213 result += sizeof(u64);
1215 if (type & PERF_SAMPLE_TRANSACTION)
1216 result += sizeof(u64);
1218 if (type & PERF_SAMPLE_REGS_INTR) {
1219 if (sample->intr_regs.abi) {
1220 result += sizeof(u64);
1221 sz = hweight64(sample->intr_regs.mask) * sizeof(u64);
1224 result += sizeof(u64);
1228 if (type & PERF_SAMPLE_PHYS_ADDR)
1229 result += sizeof(u64);
1231 if (type & PERF_SAMPLE_AUX) {
1232 result += sizeof(u64);
1233 result += sample->aux_sample.size;
1239 int perf_event__synthesize_sample(union perf_event *event, u64 type, u64 read_format,
1240 const struct perf_sample *sample)
1245 * used for cross-endian analysis. See git commit 65014ab3
1246 * for why this goofiness is needed.
1250 array = event->sample.array;
1252 if (type & PERF_SAMPLE_IDENTIFIER) {
1253 *array = sample->id;
1257 if (type & PERF_SAMPLE_IP) {
1258 *array = sample->ip;
1262 if (type & PERF_SAMPLE_TID) {
1263 u.val32[0] = sample->pid;
1264 u.val32[1] = sample->tid;
1269 if (type & PERF_SAMPLE_TIME) {
1270 *array = sample->time;
1274 if (type & PERF_SAMPLE_ADDR) {
1275 *array = sample->addr;
1279 if (type & PERF_SAMPLE_ID) {
1280 *array = sample->id;
1284 if (type & PERF_SAMPLE_STREAM_ID) {
1285 *array = sample->stream_id;
1289 if (type & PERF_SAMPLE_CPU) {
1290 u.val32[0] = sample->cpu;
1296 if (type & PERF_SAMPLE_PERIOD) {
1297 *array = sample->period;
1301 if (type & PERF_SAMPLE_READ) {
1302 if (read_format & PERF_FORMAT_GROUP)
1303 *array = sample->read.group.nr;
1305 *array = sample->read.one.value;
1308 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
1309 *array = sample->read.time_enabled;
1313 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
1314 *array = sample->read.time_running;
1318 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1319 if (read_format & PERF_FORMAT_GROUP) {
1320 sz = sample->read.group.nr *
1321 sizeof(struct sample_read_value);
1322 memcpy(array, sample->read.group.values, sz);
1323 array = (void *)array + sz;
1325 *array = sample->read.one.id;
1330 if (type & PERF_SAMPLE_CALLCHAIN) {
1331 sz = (sample->callchain->nr + 1) * sizeof(u64);
1332 memcpy(array, sample->callchain, sz);
1333 array = (void *)array + sz;
1336 if (type & PERF_SAMPLE_RAW) {
1337 u.val32[0] = sample->raw_size;
1339 array = (void *)array + sizeof(u32);
1341 memcpy(array, sample->raw_data, sample->raw_size);
1342 array = (void *)array + sample->raw_size;
1345 if (type & PERF_SAMPLE_BRANCH_STACK) {
1346 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
1348 memcpy(array, sample->branch_stack, sz);
1349 array = (void *)array + sz;
1352 if (type & PERF_SAMPLE_REGS_USER) {
1353 if (sample->user_regs.abi) {
1354 *array++ = sample->user_regs.abi;
1355 sz = hweight64(sample->user_regs.mask) * sizeof(u64);
1356 memcpy(array, sample->user_regs.regs, sz);
1357 array = (void *)array + sz;
1363 if (type & PERF_SAMPLE_STACK_USER) {
1364 sz = sample->user_stack.size;
1367 memcpy(array, sample->user_stack.data, sz);
1368 array = (void *)array + sz;
1373 if (type & PERF_SAMPLE_WEIGHT) {
1374 *array = sample->weight;
1378 if (type & PERF_SAMPLE_DATA_SRC) {
1379 *array = sample->data_src;
1383 if (type & PERF_SAMPLE_TRANSACTION) {
1384 *array = sample->transaction;
1388 if (type & PERF_SAMPLE_REGS_INTR) {
1389 if (sample->intr_regs.abi) {
1390 *array++ = sample->intr_regs.abi;
1391 sz = hweight64(sample->intr_regs.mask) * sizeof(u64);
1392 memcpy(array, sample->intr_regs.regs, sz);
1393 array = (void *)array + sz;
1399 if (type & PERF_SAMPLE_PHYS_ADDR) {
1400 *array = sample->phys_addr;
1404 if (type & PERF_SAMPLE_AUX) {
1405 sz = sample->aux_sample.size;
1407 memcpy(array, sample->aux_sample.data, sz);
1408 array = (void *)array + sz;
1414 int perf_event__synthesize_id_index(struct perf_tool *tool, perf_event__handler_t process,
1415 struct evlist *evlist, struct machine *machine)
1417 union perf_event *ev;
1418 struct evsel *evsel;
1419 size_t nr = 0, i = 0, sz, max_nr, n;
1422 pr_debug2("Synthesizing id index\n");
1424 max_nr = (UINT16_MAX - sizeof(struct perf_record_id_index)) /
1425 sizeof(struct id_index_entry);
1427 evlist__for_each_entry(evlist, evsel)
1428 nr += evsel->core.ids;
1430 n = nr > max_nr ? max_nr : nr;
1431 sz = sizeof(struct perf_record_id_index) + n * sizeof(struct id_index_entry);
1436 ev->id_index.header.type = PERF_RECORD_ID_INDEX;
1437 ev->id_index.header.size = sz;
1438 ev->id_index.nr = n;
1440 evlist__for_each_entry(evlist, evsel) {
1443 for (j = 0; j < evsel->core.ids; j++) {
1444 struct id_index_entry *e;
1445 struct perf_sample_id *sid;
1448 err = process(tool, ev, NULL, machine);
1455 e = &ev->id_index.entries[i++];
1457 e->id = evsel->core.id[j];
1459 sid = perf_evlist__id2sid(evlist, e->id);
1471 sz = sizeof(struct perf_record_id_index) + nr * sizeof(struct id_index_entry);
1472 ev->id_index.header.size = sz;
1473 ev->id_index.nr = nr;
1475 err = process(tool, ev, NULL, machine);
1482 int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
1483 struct target *target, struct perf_thread_map *threads,
1484 perf_event__handler_t process, bool data_mmap,
1485 unsigned int nr_threads_synthesize)
1487 if (target__has_task(target))
1488 return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap);
1489 else if (target__has_cpu(target))
1490 return perf_event__synthesize_threads(tool, process,
1492 nr_threads_synthesize);
1493 /* command specified */
1497 int machine__synthesize_threads(struct machine *machine, struct target *target,
1498 struct perf_thread_map *threads, bool data_mmap,
1499 unsigned int nr_threads_synthesize)
1501 return __machine__synthesize_threads(machine, NULL, target, threads,
1502 perf_event__process, data_mmap,
1503 nr_threads_synthesize);
1506 static struct perf_record_event_update *event_update_event__new(size_t size, u64 type, u64 id)
1508 struct perf_record_event_update *ev;
1510 size += sizeof(*ev);
1511 size = PERF_ALIGN(size, sizeof(u64));
1515 ev->header.type = PERF_RECORD_EVENT_UPDATE;
1516 ev->header.size = (u16)size;
1523 int perf_event__synthesize_event_update_unit(struct perf_tool *tool, struct evsel *evsel,
1524 perf_event__handler_t process)
1526 size_t size = strlen(evsel->unit);
1527 struct perf_record_event_update *ev;
1530 ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->core.id[0]);
1534 strlcpy(ev->data, evsel->unit, size + 1);
1535 err = process(tool, (union perf_event *)ev, NULL, NULL);
1540 int perf_event__synthesize_event_update_scale(struct perf_tool *tool, struct evsel *evsel,
1541 perf_event__handler_t process)
1543 struct perf_record_event_update *ev;
1544 struct perf_record_event_update_scale *ev_data;
1547 ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->core.id[0]);
1551 ev_data = (struct perf_record_event_update_scale *)ev->data;
1552 ev_data->scale = evsel->scale;
1553 err = process(tool, (union perf_event *)ev, NULL, NULL);
1558 int perf_event__synthesize_event_update_name(struct perf_tool *tool, struct evsel *evsel,
1559 perf_event__handler_t process)
1561 struct perf_record_event_update *ev;
1562 size_t len = strlen(evsel->name);
1565 ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->core.id[0]);
1569 strlcpy(ev->data, evsel->name, len + 1);
1570 err = process(tool, (union perf_event *)ev, NULL, NULL);
1575 int perf_event__synthesize_event_update_cpus(struct perf_tool *tool, struct evsel *evsel,
1576 perf_event__handler_t process)
1578 size_t size = sizeof(struct perf_record_event_update);
1579 struct perf_record_event_update *ev;
1583 if (!evsel->core.own_cpus)
1586 ev = cpu_map_data__alloc(evsel->core.own_cpus, &size, &type, &max);
1590 ev->header.type = PERF_RECORD_EVENT_UPDATE;
1591 ev->header.size = (u16)size;
1592 ev->type = PERF_EVENT_UPDATE__CPUS;
1593 ev->id = evsel->core.id[0];
1595 cpu_map_data__synthesize((struct perf_record_cpu_map_data *)ev->data,
1596 evsel->core.own_cpus, type, max);
1598 err = process(tool, (union perf_event *)ev, NULL, NULL);
1603 int perf_event__synthesize_attrs(struct perf_tool *tool, struct evlist *evlist,
1604 perf_event__handler_t process)
1606 struct evsel *evsel;
1609 evlist__for_each_entry(evlist, evsel) {
1610 err = perf_event__synthesize_attr(tool, &evsel->core.attr, evsel->core.ids,
1611 evsel->core.id, process);
1613 pr_debug("failed to create perf header attribute\n");
1621 static bool has_unit(struct evsel *evsel)
1623 return evsel->unit && *evsel->unit;
1626 static bool has_scale(struct evsel *evsel)
1628 return evsel->scale != 1;
1631 int perf_event__synthesize_extra_attr(struct perf_tool *tool, struct evlist *evsel_list,
1632 perf_event__handler_t process, bool is_pipe)
1634 struct evsel *evsel;
1638 * Synthesize other events stuff not carried within
1639 * attr event - unit, scale, name
1641 evlist__for_each_entry(evsel_list, evsel) {
1642 if (!evsel->supported)
1646 * Synthesize unit and scale only if it's defined.
1648 if (has_unit(evsel)) {
1649 err = perf_event__synthesize_event_update_unit(tool, evsel, process);
1651 pr_err("Couldn't synthesize evsel unit.\n");
1656 if (has_scale(evsel)) {
1657 err = perf_event__synthesize_event_update_scale(tool, evsel, process);
1659 pr_err("Couldn't synthesize evsel evsel.\n");
1664 if (evsel->core.own_cpus) {
1665 err = perf_event__synthesize_event_update_cpus(tool, evsel, process);
1667 pr_err("Couldn't synthesize evsel cpus.\n");
1673 * Name is needed only for pipe output,
1674 * perf.data carries event names.
1677 err = perf_event__synthesize_event_update_name(tool, evsel, process);
1679 pr_err("Couldn't synthesize evsel name.\n");
1687 int perf_event__synthesize_attr(struct perf_tool *tool, struct perf_event_attr *attr,
1688 u32 ids, u64 *id, perf_event__handler_t process)
1690 union perf_event *ev;
1694 size = sizeof(struct perf_event_attr);
1695 size = PERF_ALIGN(size, sizeof(u64));
1696 size += sizeof(struct perf_event_header);
1697 size += ids * sizeof(u64);
1704 ev->attr.attr = *attr;
1705 memcpy(ev->attr.id, id, ids * sizeof(u64));
1707 ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
1708 ev->attr.header.size = (u16)size;
1710 if (ev->attr.header.size == size)
1711 err = process(tool, ev, NULL, NULL);
1720 int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd, struct evlist *evlist,
1721 perf_event__handler_t process)
1723 union perf_event ev;
1724 struct tracing_data *tdata;
1725 ssize_t size = 0, aligned_size = 0, padding;
1729 * We are going to store the size of the data followed
1730 * by the data contents. Since the fd descriptor is a pipe,
1731 * we cannot seek back to store the size of the data once
1732 * we know it. Instead we:
1734 * - write the tracing data to the temp file
1735 * - get/write the data size to pipe
1736 * - write the tracing data from the temp file
1739 tdata = tracing_data_get(&evlist->core.entries, fd, true);
1743 memset(&ev, 0, sizeof(ev));
1745 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
1747 aligned_size = PERF_ALIGN(size, sizeof(u64));
1748 padding = aligned_size - size;
1749 ev.tracing_data.header.size = sizeof(ev.tracing_data);
1750 ev.tracing_data.size = aligned_size;
1752 process(tool, &ev, NULL, NULL);
1755 * The put function will copy all the tracing data
1756 * stored in temp file to the pipe.
1758 tracing_data_put(tdata);
1760 ff = (struct feat_fd){ .fd = fd };
1761 if (write_padded(&ff, NULL, 0, padding))
1764 return aligned_size;
1767 int perf_event__synthesize_build_id(struct perf_tool *tool, struct dso *pos, u16 misc,
1768 perf_event__handler_t process, struct machine *machine)
1770 union perf_event ev;
1776 memset(&ev, 0, sizeof(ev));
1778 len = pos->long_name_len + 1;
1779 len = PERF_ALIGN(len, NAME_ALIGN);
1780 memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
1781 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
1782 ev.build_id.header.misc = misc;
1783 ev.build_id.pid = machine->pid;
1784 ev.build_id.header.size = sizeof(ev.build_id) + len;
1785 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
1787 return process(tool, &ev, NULL, machine);
1790 int perf_event__synthesize_stat_events(struct perf_stat_config *config, struct perf_tool *tool,
1791 struct evlist *evlist, perf_event__handler_t process, bool attrs)
1796 err = perf_event__synthesize_attrs(tool, evlist, process);
1798 pr_err("Couldn't synthesize attrs.\n");
1803 err = perf_event__synthesize_extra_attr(tool, evlist, process, attrs);
1804 err = perf_event__synthesize_thread_map2(tool, evlist->core.threads, process, NULL);
1806 pr_err("Couldn't synthesize thread map.\n");
1810 err = perf_event__synthesize_cpu_map(tool, evlist->core.cpus, process, NULL);
1812 pr_err("Couldn't synthesize thread map.\n");
1816 err = perf_event__synthesize_stat_config(tool, config, process, NULL);
1818 pr_err("Couldn't synthesize config.\n");
1825 int __weak perf_event__synth_time_conv(const struct perf_event_mmap_page *pc __maybe_unused,
1826 struct perf_tool *tool __maybe_unused,
1827 perf_event__handler_t process __maybe_unused,
1828 struct machine *machine __maybe_unused)
1833 extern const struct perf_header_feature_ops feat_ops[HEADER_LAST_FEATURE];
1835 int perf_event__synthesize_features(struct perf_tool *tool, struct perf_session *session,
1836 struct evlist *evlist, perf_event__handler_t process)
1838 struct perf_header *header = &session->header;
1839 struct perf_record_header_feature *fe;
1844 sz_hdr = sizeof(fe->header);
1845 sz = sizeof(union perf_event);
1846 /* get a nice alignment */
1847 sz = PERF_ALIGN(sz, page_size);
1849 memset(&ff, 0, sizeof(ff));
1851 ff.buf = malloc(sz);
1855 ff.size = sz - sz_hdr;
1856 ff.ph = &session->header;
1858 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
1859 if (!feat_ops[feat].synthesize) {
1860 pr_debug("No record header feature for header :%d\n", feat);
1864 ff.offset = sizeof(*fe);
1866 ret = feat_ops[feat].write(&ff, evlist);
1867 if (ret || ff.offset <= (ssize_t)sizeof(*fe)) {
1868 pr_debug("Error writing feature\n");
1871 /* ff.buf may have changed due to realloc in do_write() */
1873 memset(fe, 0, sizeof(*fe));
1876 fe->header.type = PERF_RECORD_HEADER_FEATURE;
1877 fe->header.size = ff.offset;
1879 ret = process(tool, ff.buf, NULL, NULL);
1886 /* Send HEADER_LAST_FEATURE mark. */
1888 fe->feat_id = HEADER_LAST_FEATURE;
1889 fe->header.type = PERF_RECORD_HEADER_FEATURE;
1890 fe->header.size = sizeof(*fe);
1892 ret = process(tool, ff.buf, NULL, NULL);