1 // SPDX-License-Identifier: GPL-2.0
5 #include <linux/kernel.h>
6 #include <linux/types.h>
10 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
11 #include <api/fs/fs.h>
12 #include <linux/perf_event.h>
21 #include "thread_map.h"
22 #include "sane_ctype.h"
23 #include "symbol/kallsyms.h"
27 static const char *perf_event__names[] = {
29 [PERF_RECORD_MMAP] = "MMAP",
30 [PERF_RECORD_MMAP2] = "MMAP2",
31 [PERF_RECORD_LOST] = "LOST",
32 [PERF_RECORD_COMM] = "COMM",
33 [PERF_RECORD_EXIT] = "EXIT",
34 [PERF_RECORD_THROTTLE] = "THROTTLE",
35 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
36 [PERF_RECORD_FORK] = "FORK",
37 [PERF_RECORD_READ] = "READ",
38 [PERF_RECORD_SAMPLE] = "SAMPLE",
39 [PERF_RECORD_AUX] = "AUX",
40 [PERF_RECORD_ITRACE_START] = "ITRACE_START",
41 [PERF_RECORD_LOST_SAMPLES] = "LOST_SAMPLES",
42 [PERF_RECORD_SWITCH] = "SWITCH",
43 [PERF_RECORD_SWITCH_CPU_WIDE] = "SWITCH_CPU_WIDE",
44 [PERF_RECORD_NAMESPACES] = "NAMESPACES",
45 [PERF_RECORD_HEADER_ATTR] = "ATTR",
46 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
47 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
48 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
49 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
50 [PERF_RECORD_ID_INDEX] = "ID_INDEX",
51 [PERF_RECORD_AUXTRACE_INFO] = "AUXTRACE_INFO",
52 [PERF_RECORD_AUXTRACE] = "AUXTRACE",
53 [PERF_RECORD_AUXTRACE_ERROR] = "AUXTRACE_ERROR",
54 [PERF_RECORD_THREAD_MAP] = "THREAD_MAP",
55 [PERF_RECORD_CPU_MAP] = "CPU_MAP",
56 [PERF_RECORD_STAT_CONFIG] = "STAT_CONFIG",
57 [PERF_RECORD_STAT] = "STAT",
58 [PERF_RECORD_STAT_ROUND] = "STAT_ROUND",
59 [PERF_RECORD_EVENT_UPDATE] = "EVENT_UPDATE",
60 [PERF_RECORD_TIME_CONV] = "TIME_CONV",
61 [PERF_RECORD_HEADER_FEATURE] = "FEATURE",
64 static const char *perf_ns__names[] = {
65 [NET_NS_INDEX] = "net",
66 [UTS_NS_INDEX] = "uts",
67 [IPC_NS_INDEX] = "ipc",
68 [PID_NS_INDEX] = "pid",
69 [USER_NS_INDEX] = "user",
70 [MNT_NS_INDEX] = "mnt",
71 [CGROUP_NS_INDEX] = "cgroup",
74 const char *perf_event__name(unsigned int id)
76 if (id >= ARRAY_SIZE(perf_event__names))
78 if (!perf_event__names[id])
80 return perf_event__names[id];
83 static const char *perf_ns__name(unsigned int id)
85 if (id >= ARRAY_SIZE(perf_ns__names))
87 return perf_ns__names[id];
90 static int perf_tool__process_synth_event(struct perf_tool *tool,
91 union perf_event *event,
92 struct machine *machine,
93 perf_event__handler_t process)
95 struct perf_sample synth_sample = {
102 .cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
105 return process(tool, event, &synth_sample, machine);
109 * Assumes that the first 4095 bytes of /proc/pid/stat contains
110 * the comm, tgid and ppid.
112 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
113 pid_t *tgid, pid_t *ppid)
115 char filename[PATH_MAX];
120 char *name, *tgids, *ppids;
125 snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
127 fd = open(filename, O_RDONLY);
129 pr_debug("couldn't open %s\n", filename);
133 n = read(fd, bf, sizeof(bf) - 1);
136 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
142 name = strstr(bf, "Name:");
143 tgids = strstr(bf, "Tgid:");
144 ppids = strstr(bf, "PPid:");
149 name += 5; /* strlen("Name:") */
152 nl = strchr(name, '\n');
159 memcpy(comm, name, size);
162 pr_debug("Name: string not found for pid %d\n", pid);
166 tgids += 5; /* strlen("Tgid:") */
169 pr_debug("Tgid: string not found for pid %d\n", pid);
173 ppids += 5; /* strlen("PPid:") */
176 pr_debug("PPid: string not found for pid %d\n", pid);
182 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
183 struct machine *machine,
184 pid_t *tgid, pid_t *ppid)
190 memset(&event->comm, 0, sizeof(event->comm));
192 if (machine__is_host(machine)) {
193 if (perf_event__get_comm_ids(pid, event->comm.comm,
194 sizeof(event->comm.comm),
199 *tgid = machine->pid;
205 event->comm.pid = *tgid;
206 event->comm.header.type = PERF_RECORD_COMM;
208 size = strlen(event->comm.comm) + 1;
209 size = PERF_ALIGN(size, sizeof(u64));
210 memset(event->comm.comm + size, 0, machine->id_hdr_size);
211 event->comm.header.size = (sizeof(event->comm) -
212 (sizeof(event->comm.comm) - size) +
213 machine->id_hdr_size);
214 event->comm.tid = pid;
219 pid_t perf_event__synthesize_comm(struct perf_tool *tool,
220 union perf_event *event, pid_t pid,
221 perf_event__handler_t process,
222 struct machine *machine)
226 if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
229 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
235 static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
236 struct perf_ns_link_info *ns_link_info)
241 sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
242 if (stat64(proc_ns, &st) == 0) {
243 ns_link_info->dev = st.st_dev;
244 ns_link_info->ino = st.st_ino;
248 int perf_event__synthesize_namespaces(struct perf_tool *tool,
249 union perf_event *event,
250 pid_t pid, pid_t tgid,
251 perf_event__handler_t process,
252 struct machine *machine)
255 struct perf_ns_link_info *ns_link_info;
257 if (!tool || !tool->namespace_events)
260 memset(&event->namespaces, 0, (sizeof(event->namespaces) +
261 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
262 machine->id_hdr_size));
264 event->namespaces.pid = tgid;
265 event->namespaces.tid = pid;
267 event->namespaces.nr_namespaces = NR_NAMESPACES;
269 ns_link_info = event->namespaces.link_info;
271 for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
272 perf_event__get_ns_link_info(pid, perf_ns__name(idx),
275 event->namespaces.header.type = PERF_RECORD_NAMESPACES;
277 event->namespaces.header.size = (sizeof(event->namespaces) +
278 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
279 machine->id_hdr_size);
281 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
287 static int perf_event__synthesize_fork(struct perf_tool *tool,
288 union perf_event *event,
289 pid_t pid, pid_t tgid, pid_t ppid,
290 perf_event__handler_t process,
291 struct machine *machine)
293 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
296 * for main thread set parent to ppid from status file. For other
297 * threads set parent pid to main thread. ie., assume main thread
298 * spawns all threads in a process
301 event->fork.ppid = ppid;
302 event->fork.ptid = ppid;
304 event->fork.ppid = tgid;
305 event->fork.ptid = tgid;
307 event->fork.pid = tgid;
308 event->fork.tid = pid;
309 event->fork.header.type = PERF_RECORD_FORK;
311 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
313 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
319 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
320 union perf_event *event,
321 pid_t pid, pid_t tgid,
322 perf_event__handler_t process,
323 struct machine *machine,
325 unsigned int proc_map_timeout)
327 char filename[PATH_MAX];
329 unsigned long long t;
330 bool truncation = false;
331 unsigned long long timeout = proc_map_timeout * 1000000ULL;
333 const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
334 int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
336 if (machine__is_default_guest(machine))
339 snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps",
340 machine->root_dir, pid, pid);
342 fp = fopen(filename, "r");
345 * We raced with a task exiting - just return:
347 pr_debug("couldn't open %s\n", filename);
351 event->header.type = PERF_RECORD_MMAP2;
357 char execname[PATH_MAX];
358 char anonstr[] = "//anon";
363 if (fgets(bf, sizeof(bf), fp) == NULL)
366 if ((rdclock() - t) > timeout) {
367 pr_warning("Reading %s time out. "
368 "You may want to increase "
369 "the time limit by --proc-map-timeout\n",
375 /* ensure null termination since stack will be reused. */
376 strcpy(execname, "");
378 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
379 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n",
380 &event->mmap2.start, &event->mmap2.len, prot,
381 &event->mmap2.pgoff, &event->mmap2.maj,
386 * Anon maps don't have the execname.
391 event->mmap2.ino = (u64)ino;
394 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
396 if (machine__is_host(machine))
397 event->header.misc = PERF_RECORD_MISC_USER;
399 event->header.misc = PERF_RECORD_MISC_GUEST_USER;
401 /* map protection and flags bits */
402 event->mmap2.prot = 0;
403 event->mmap2.flags = 0;
405 event->mmap2.prot |= PROT_READ;
407 event->mmap2.prot |= PROT_WRITE;
409 event->mmap2.prot |= PROT_EXEC;
412 event->mmap2.flags |= MAP_SHARED;
414 event->mmap2.flags |= MAP_PRIVATE;
416 if (prot[2] != 'x') {
417 if (!mmap_data || prot[0] != 'r')
420 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
425 event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
427 if (!strcmp(execname, ""))
428 strcpy(execname, anonstr);
430 if (hugetlbfs_mnt_len &&
431 !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) {
432 strcpy(execname, anonstr);
433 event->mmap2.flags |= MAP_HUGETLB;
436 size = strlen(execname) + 1;
437 memcpy(event->mmap2.filename, execname, size);
438 size = PERF_ALIGN(size, sizeof(u64));
439 event->mmap2.len -= event->mmap.start;
440 event->mmap2.header.size = (sizeof(event->mmap2) -
441 (sizeof(event->mmap2.filename) - size));
442 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
443 event->mmap2.header.size += machine->id_hdr_size;
444 event->mmap2.pid = tgid;
445 event->mmap2.tid = pid;
447 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
460 int perf_event__synthesize_modules(struct perf_tool *tool,
461 perf_event__handler_t process,
462 struct machine *machine)
466 struct map_groups *kmaps = &machine->kmaps;
467 struct maps *maps = &kmaps->maps[MAP__FUNCTION];
468 union perf_event *event = zalloc((sizeof(event->mmap) +
469 machine->id_hdr_size));
471 pr_debug("Not enough memory synthesizing mmap event "
472 "for kernel modules\n");
476 event->header.type = PERF_RECORD_MMAP;
479 * kernel uses 0 for user space maps, see kernel/perf_event.c
482 if (machine__is_host(machine))
483 event->header.misc = PERF_RECORD_MISC_KERNEL;
485 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
487 for (pos = maps__first(maps); pos; pos = map__next(pos)) {
490 if (__map__is_kernel(pos))
493 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
494 event->mmap.header.type = PERF_RECORD_MMAP;
495 event->mmap.header.size = (sizeof(event->mmap) -
496 (sizeof(event->mmap.filename) - size));
497 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
498 event->mmap.header.size += machine->id_hdr_size;
499 event->mmap.start = pos->start;
500 event->mmap.len = pos->end - pos->start;
501 event->mmap.pid = machine->pid;
503 memcpy(event->mmap.filename, pos->dso->long_name,
504 pos->dso->long_name_len + 1);
505 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
515 static int __event__synthesize_thread(union perf_event *comm_event,
516 union perf_event *mmap_event,
517 union perf_event *fork_event,
518 union perf_event *namespaces_event,
520 perf_event__handler_t process,
521 struct perf_tool *tool,
522 struct machine *machine,
524 unsigned int proc_map_timeout)
526 char filename[PATH_MAX];
528 struct dirent *dirent;
532 /* special case: only send one comm event using passed in pid */
534 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
540 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
541 tgid, process, machine) < 0)
545 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
546 process, machine, mmap_data,
550 if (machine__is_default_guest(machine))
553 snprintf(filename, sizeof(filename), "%s/proc/%d/task",
554 machine->root_dir, pid);
556 tasks = opendir(filename);
558 pr_debug("couldn't open %s\n", filename);
562 while ((dirent = readdir(tasks)) != NULL) {
566 _pid = strtol(dirent->d_name, &end, 10);
571 if (perf_event__prepare_comm(comm_event, _pid, machine,
575 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
576 ppid, process, machine) < 0)
579 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
580 tgid, process, machine) < 0)
584 * Send the prepared comm event
586 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
591 /* process the parent's maps too */
592 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
593 process, machine, mmap_data, proc_map_timeout);
603 int perf_event__synthesize_thread_map(struct perf_tool *tool,
604 struct thread_map *threads,
605 perf_event__handler_t process,
606 struct machine *machine,
608 unsigned int proc_map_timeout)
610 union perf_event *comm_event, *mmap_event, *fork_event;
611 union perf_event *namespaces_event;
612 int err = -1, thread, j;
614 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
615 if (comm_event == NULL)
618 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
619 if (mmap_event == NULL)
622 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
623 if (fork_event == NULL)
626 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
627 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
628 machine->id_hdr_size);
629 if (namespaces_event == NULL)
633 for (thread = 0; thread < threads->nr; ++thread) {
634 if (__event__synthesize_thread(comm_event, mmap_event,
635 fork_event, namespaces_event,
636 thread_map__pid(threads, thread), 0,
637 process, tool, machine,
638 mmap_data, proc_map_timeout)) {
644 * comm.pid is set to thread group id by
645 * perf_event__synthesize_comm
647 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
648 bool need_leader = true;
650 /* is thread group leader in thread_map? */
651 for (j = 0; j < threads->nr; ++j) {
652 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
658 /* if not, generate events for it */
660 __event__synthesize_thread(comm_event, mmap_event,
661 fork_event, namespaces_event,
662 comm_event->comm.pid, 0,
663 process, tool, machine,
664 mmap_data, proc_map_timeout)) {
670 free(namespaces_event);
681 int perf_event__synthesize_threads(struct perf_tool *tool,
682 perf_event__handler_t process,
683 struct machine *machine,
685 unsigned int proc_map_timeout)
688 char proc_path[PATH_MAX];
689 struct dirent *dirent;
690 union perf_event *comm_event, *mmap_event, *fork_event;
691 union perf_event *namespaces_event;
694 if (machine__is_default_guest(machine))
697 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
698 if (comm_event == NULL)
701 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
702 if (mmap_event == NULL)
705 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
706 if (fork_event == NULL)
709 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
710 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
711 machine->id_hdr_size);
712 if (namespaces_event == NULL)
715 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
716 proc = opendir(proc_path);
719 goto out_free_namespaces;
721 while ((dirent = readdir(proc)) != NULL) {
723 pid_t pid = strtol(dirent->d_name, &end, 10);
725 if (*end) /* only interested in proper numerical dirents */
728 * We may race with exiting thread, so don't stop just because
729 * one thread couldn't be synthesized.
731 __event__synthesize_thread(comm_event, mmap_event, fork_event,
732 namespaces_event, pid, 1, process,
733 tool, machine, mmap_data,
740 free(namespaces_event);
751 struct process_symbol_args {
756 static int find_symbol_cb(void *arg, const char *name, char type,
759 struct process_symbol_args *args = arg;
762 * Must be a function or at least an alias, as in PARISC64, where "_text" is
763 * an 'A' to the same address as "_stext".
765 if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
766 type == 'A') || strcmp(name, args->name))
773 int kallsyms__get_function_start(const char *kallsyms_filename,
774 const char *symbol_name, u64 *addr)
776 struct process_symbol_args args = { .name = symbol_name, };
778 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
785 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
786 perf_event__handler_t process,
787 struct machine *machine)
790 const char *mmap_name;
791 char name_buff[PATH_MAX];
792 struct map *map = machine__kernel_map(machine);
795 union perf_event *event;
797 if (symbol_conf.kptr_restrict)
803 * We should get this from /sys/kernel/sections/.text, but till that is
804 * available use this, and after it is use this as a fallback for older
807 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
809 pr_debug("Not enough memory synthesizing mmap event "
810 "for kernel modules\n");
814 mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
815 if (machine__is_host(machine)) {
817 * kernel uses PERF_RECORD_MISC_USER for user space maps,
818 * see kernel/perf_event.c __perf_event_mmap
820 event->header.misc = PERF_RECORD_MISC_KERNEL;
822 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
825 kmap = map__kmap(map);
826 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
827 "%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1;
828 size = PERF_ALIGN(size, sizeof(u64));
829 event->mmap.header.type = PERF_RECORD_MMAP;
830 event->mmap.header.size = (sizeof(event->mmap) -
831 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
832 event->mmap.pgoff = kmap->ref_reloc_sym->addr;
833 event->mmap.start = map->start;
834 event->mmap.len = map->end - event->mmap.start;
835 event->mmap.pid = machine->pid;
837 err = perf_tool__process_synth_event(tool, event, machine, process);
843 int perf_event__synthesize_thread_map2(struct perf_tool *tool,
844 struct thread_map *threads,
845 perf_event__handler_t process,
846 struct machine *machine)
848 union perf_event *event;
851 size = sizeof(event->thread_map);
852 size += threads->nr * sizeof(event->thread_map.entries[0]);
854 event = zalloc(size);
858 event->header.type = PERF_RECORD_THREAD_MAP;
859 event->header.size = size;
860 event->thread_map.nr = threads->nr;
862 for (i = 0; i < threads->nr; i++) {
863 struct thread_map_event_entry *entry = &event->thread_map.entries[i];
864 char *comm = thread_map__comm(threads, i);
869 entry->pid = thread_map__pid(threads, i);
870 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
873 err = process(tool, event, NULL, machine);
879 static void synthesize_cpus(struct cpu_map_entries *cpus,
886 for (i = 0; i < map->nr; i++)
887 cpus->cpu[i] = map->map[i];
890 static void synthesize_mask(struct cpu_map_mask *mask,
891 struct cpu_map *map, int max)
895 mask->nr = BITS_TO_LONGS(max);
896 mask->long_size = sizeof(long);
898 for (i = 0; i < map->nr; i++)
899 set_bit(map->map[i], mask->mask);
902 static size_t cpus_size(struct cpu_map *map)
904 return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
907 static size_t mask_size(struct cpu_map *map, int *max)
913 for (i = 0; i < map->nr; i++) {
914 /* bit possition of the cpu is + 1 */
915 int bit = map->map[i] + 1;
921 return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long);
924 void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max)
926 size_t size_cpus, size_mask;
927 bool is_dummy = cpu_map__empty(map);
930 * Both array and mask data have variable size based
931 * on the number of cpus and their actual values.
932 * The size of the 'struct cpu_map_data' is:
934 * array = size of 'struct cpu_map_entries' +
935 * number of cpus * sizeof(u64)
937 * mask = size of 'struct cpu_map_mask' +
938 * maximum cpu bit converted to size of longs
940 * and finaly + the size of 'struct cpu_map_data'.
942 size_cpus = cpus_size(map);
943 size_mask = mask_size(map, max);
945 if (is_dummy || (size_cpus < size_mask)) {
947 *type = PERF_CPU_MAP__CPUS;
950 *type = PERF_CPU_MAP__MASK;
953 *size += sizeof(struct cpu_map_data);
954 return zalloc(*size);
957 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map,
963 case PERF_CPU_MAP__CPUS:
964 synthesize_cpus((struct cpu_map_entries *) data->data, map);
966 case PERF_CPU_MAP__MASK:
967 synthesize_mask((struct cpu_map_mask *) data->data, map, max);
973 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map)
975 size_t size = sizeof(struct cpu_map_event);
976 struct cpu_map_event *event;
980 event = cpu_map_data__alloc(map, &size, &type, &max);
984 event->header.type = PERF_RECORD_CPU_MAP;
985 event->header.size = size;
986 event->data.type = type;
988 cpu_map_data__synthesize(&event->data, map, type, max);
992 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
994 perf_event__handler_t process,
995 struct machine *machine)
997 struct cpu_map_event *event;
1000 event = cpu_map_event__new(map);
1004 err = process(tool, (union perf_event *) event, NULL, machine);
1010 int perf_event__synthesize_stat_config(struct perf_tool *tool,
1011 struct perf_stat_config *config,
1012 perf_event__handler_t process,
1013 struct machine *machine)
1015 struct stat_config_event *event;
1016 int size, i = 0, err;
1018 size = sizeof(*event);
1019 size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
1021 event = zalloc(size);
1025 event->header.type = PERF_RECORD_STAT_CONFIG;
1026 event->header.size = size;
1027 event->nr = PERF_STAT_CONFIG_TERM__MAX;
1029 #define ADD(__term, __val) \
1030 event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \
1031 event->data[i].val = __val; \
1034 ADD(AGGR_MODE, config->aggr_mode)
1035 ADD(INTERVAL, config->interval)
1036 ADD(SCALE, config->scale)
1038 WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
1039 "stat config terms unbalanced\n");
1042 err = process(tool, (union perf_event *) event, NULL, machine);
1048 int perf_event__synthesize_stat(struct perf_tool *tool,
1049 u32 cpu, u32 thread, u64 id,
1050 struct perf_counts_values *count,
1051 perf_event__handler_t process,
1052 struct machine *machine)
1054 struct stat_event event;
1056 event.header.type = PERF_RECORD_STAT;
1057 event.header.size = sizeof(event);
1058 event.header.misc = 0;
1062 event.thread = thread;
1063 event.val = count->val;
1064 event.ena = count->ena;
1065 event.run = count->run;
1067 return process(tool, (union perf_event *) &event, NULL, machine);
1070 int perf_event__synthesize_stat_round(struct perf_tool *tool,
1071 u64 evtime, u64 type,
1072 perf_event__handler_t process,
1073 struct machine *machine)
1075 struct stat_round_event event;
1077 event.header.type = PERF_RECORD_STAT_ROUND;
1078 event.header.size = sizeof(event);
1079 event.header.misc = 0;
1081 event.time = evtime;
1084 return process(tool, (union perf_event *) &event, NULL, machine);
1087 void perf_event__read_stat_config(struct perf_stat_config *config,
1088 struct stat_config_event *event)
1092 for (i = 0; i < event->nr; i++) {
1094 switch (event->data[i].tag) {
1095 #define CASE(__term, __val) \
1096 case PERF_STAT_CONFIG_TERM__##__term: \
1097 config->__val = event->data[i].val; \
1100 CASE(AGGR_MODE, aggr_mode)
1102 CASE(INTERVAL, interval)
1105 pr_warning("unknown stat config term %" PRIu64 "\n",
1106 event->data[i].tag);
1111 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
1115 if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
1120 return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
1123 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
1126 struct perf_ns_link_info *ns_link_info;
1127 u32 nr_namespaces, idx;
1129 ns_link_info = event->namespaces.link_info;
1130 nr_namespaces = event->namespaces.nr_namespaces;
1132 ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
1133 event->namespaces.pid,
1134 event->namespaces.tid,
1137 for (idx = 0; idx < nr_namespaces; idx++) {
1138 if (idx && (idx % 4 == 0))
1139 ret += fprintf(fp, "\n\t\t ");
1141 ret += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
1142 perf_ns__name(idx), (u64)ns_link_info[idx].dev,
1143 (u64)ns_link_info[idx].ino,
1144 ((idx + 1) != nr_namespaces) ? ", " : "]\n");
1150 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
1151 union perf_event *event,
1152 struct perf_sample *sample,
1153 struct machine *machine)
1155 return machine__process_comm_event(machine, event, sample);
1158 int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
1159 union perf_event *event,
1160 struct perf_sample *sample,
1161 struct machine *machine)
1163 return machine__process_namespaces_event(machine, event, sample);
1166 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
1167 union perf_event *event,
1168 struct perf_sample *sample,
1169 struct machine *machine)
1171 return machine__process_lost_event(machine, event, sample);
1174 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
1175 union perf_event *event,
1176 struct perf_sample *sample __maybe_unused,
1177 struct machine *machine)
1179 return machine__process_aux_event(machine, event);
1182 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
1183 union perf_event *event,
1184 struct perf_sample *sample __maybe_unused,
1185 struct machine *machine)
1187 return machine__process_itrace_start_event(machine, event);
1190 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
1191 union perf_event *event,
1192 struct perf_sample *sample,
1193 struct machine *machine)
1195 return machine__process_lost_samples_event(machine, event, sample);
1198 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
1199 union perf_event *event,
1200 struct perf_sample *sample __maybe_unused,
1201 struct machine *machine)
1203 return machine__process_switch_event(machine, event);
1206 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1208 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
1209 event->mmap.pid, event->mmap.tid, event->mmap.start,
1210 event->mmap.len, event->mmap.pgoff,
1211 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1212 event->mmap.filename);
1215 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1217 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
1218 " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
1219 event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1220 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1221 event->mmap2.min, event->mmap2.ino,
1222 event->mmap2.ino_generation,
1223 (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1224 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1225 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1226 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1227 event->mmap2.filename);
1230 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1232 struct thread_map *threads = thread_map__new_event(&event->thread_map);
1235 ret = fprintf(fp, " nr: ");
1238 ret += thread_map__fprintf(threads, fp);
1240 ret += fprintf(fp, "failed to get threads from event\n");
1242 thread_map__put(threads);
1246 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1248 struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1251 ret = fprintf(fp, ": ");
1254 ret += cpu_map__fprintf(cpus, fp);
1256 ret += fprintf(fp, "failed to get cpumap from event\n");
1262 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1263 union perf_event *event,
1264 struct perf_sample *sample,
1265 struct machine *machine)
1267 return machine__process_mmap_event(machine, event, sample);
1270 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1271 union perf_event *event,
1272 struct perf_sample *sample,
1273 struct machine *machine)
1275 return machine__process_mmap2_event(machine, event, sample);
1278 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1280 return fprintf(fp, "(%d:%d):(%d:%d)\n",
1281 event->fork.pid, event->fork.tid,
1282 event->fork.ppid, event->fork.ptid);
1285 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1286 union perf_event *event,
1287 struct perf_sample *sample,
1288 struct machine *machine)
1290 return machine__process_fork_event(machine, event, sample);
1293 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1294 union perf_event *event,
1295 struct perf_sample *sample,
1296 struct machine *machine)
1298 return machine__process_exit_event(machine, event, sample);
1301 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1303 return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s%s]\n",
1304 event->aux.aux_offset, event->aux.aux_size,
1306 event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1307 event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
1308 event->aux.flags & PERF_AUX_FLAG_PARTIAL ? "P" : "");
1311 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1313 return fprintf(fp, " pid: %u tid: %u\n",
1314 event->itrace_start.pid, event->itrace_start.tid);
1317 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1319 bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1320 const char *in_out = out ? "OUT" : "IN ";
1322 if (event->header.type == PERF_RECORD_SWITCH)
1323 return fprintf(fp, " %s\n", in_out);
1325 return fprintf(fp, " %s %s pid/tid: %5u/%-5u\n",
1326 in_out, out ? "next" : "prev",
1327 event->context_switch.next_prev_pid,
1328 event->context_switch.next_prev_tid);
1331 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1333 size_t ret = fprintf(fp, "PERF_RECORD_%s",
1334 perf_event__name(event->header.type));
1336 switch (event->header.type) {
1337 case PERF_RECORD_COMM:
1338 ret += perf_event__fprintf_comm(event, fp);
1340 case PERF_RECORD_FORK:
1341 case PERF_RECORD_EXIT:
1342 ret += perf_event__fprintf_task(event, fp);
1344 case PERF_RECORD_MMAP:
1345 ret += perf_event__fprintf_mmap(event, fp);
1347 case PERF_RECORD_NAMESPACES:
1348 ret += perf_event__fprintf_namespaces(event, fp);
1350 case PERF_RECORD_MMAP2:
1351 ret += perf_event__fprintf_mmap2(event, fp);
1353 case PERF_RECORD_AUX:
1354 ret += perf_event__fprintf_aux(event, fp);
1356 case PERF_RECORD_ITRACE_START:
1357 ret += perf_event__fprintf_itrace_start(event, fp);
1359 case PERF_RECORD_SWITCH:
1360 case PERF_RECORD_SWITCH_CPU_WIDE:
1361 ret += perf_event__fprintf_switch(event, fp);
1364 ret += fprintf(fp, "\n");
1370 int perf_event__process(struct perf_tool *tool __maybe_unused,
1371 union perf_event *event,
1372 struct perf_sample *sample,
1373 struct machine *machine)
1375 return machine__process_event(machine, event, sample);
1378 void thread__find_addr_map(struct thread *thread, u8 cpumode,
1379 enum map_type type, u64 addr,
1380 struct addr_location *al)
1382 struct map_groups *mg = thread->mg;
1383 struct machine *machine = mg->machine;
1384 bool load_map = false;
1386 al->machine = machine;
1387 al->thread = thread;
1389 al->cpumode = cpumode;
1392 if (machine == NULL) {
1397 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1399 mg = &machine->kmaps;
1401 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1403 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1405 mg = &machine->kmaps;
1407 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1413 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1414 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1416 al->filtered |= (1 << HIST_FILTER__GUEST);
1417 if ((cpumode == PERF_RECORD_MISC_USER ||
1418 cpumode == PERF_RECORD_MISC_KERNEL) &&
1420 al->filtered |= (1 << HIST_FILTER__HOST);
1425 al->map = map_groups__find(mg, type, al->addr);
1426 if (al->map == NULL) {
1428 * If this is outside of all known maps, and is a negative
1429 * address, try to look it up in the kernel dso, as it might be
1430 * a vsyscall or vdso (which executes in user-mode).
1432 * XXX This is nasty, we should have a symbol list in the
1433 * "[vdso]" dso, but for now lets use the old trick of looking
1434 * in the whole kernel symbol list.
1436 if (cpumode == PERF_RECORD_MISC_USER && machine &&
1437 mg != &machine->kmaps &&
1438 machine__kernel_ip(machine, al->addr)) {
1439 mg = &machine->kmaps;
1445 * Kernel maps might be changed when loading symbols so loading
1446 * must be done prior to using kernel maps.
1450 al->addr = al->map->map_ip(al->map, al->addr);
1454 void thread__find_addr_location(struct thread *thread,
1455 u8 cpumode, enum map_type type, u64 addr,
1456 struct addr_location *al)
1458 thread__find_addr_map(thread, cpumode, type, addr, al);
1459 if (al->map != NULL)
1460 al->sym = map__find_symbol(al->map, al->addr);
1466 * Callers need to drop the reference to al->thread, obtained in
1467 * machine__findnew_thread()
1469 int machine__resolve(struct machine *machine, struct addr_location *al,
1470 struct perf_sample *sample)
1472 struct thread *thread = machine__findnew_thread(machine, sample->pid,
1478 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1480 * Have we already created the kernel maps for this machine?
1482 * This should have happened earlier, when we processed the kernel MMAP
1483 * events, but for older perf.data files there was no such thing, so do
1486 if (sample->cpumode == PERF_RECORD_MISC_KERNEL &&
1487 machine__kernel_map(machine) == NULL)
1488 machine__create_kernel_maps(machine);
1490 thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->ip, al);
1491 dump_printf(" ...... dso: %s\n",
1492 al->map ? al->map->dso->long_name :
1493 al->level == 'H' ? "[hypervisor]" : "<not found>");
1495 if (thread__is_filtered(thread))
1496 al->filtered |= (1 << HIST_FILTER__THREAD);
1499 al->cpu = sample->cpu;
1503 struct perf_env *env = machine->env;
1505 if (env && env->cpu)
1506 al->socket = env->cpu[al->cpu].socket_id;
1510 struct dso *dso = al->map->dso;
1512 if (symbol_conf.dso_list &&
1513 (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1515 (dso->short_name != dso->long_name &&
1516 strlist__has_entry(symbol_conf.dso_list,
1517 dso->long_name))))) {
1518 al->filtered |= (1 << HIST_FILTER__DSO);
1521 al->sym = map__find_symbol(al->map, al->addr);
1524 if (symbol_conf.sym_list &&
1525 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1527 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1534 * The preprocess_sample method will return with reference counts for the
1535 * in it, when done using (and perhaps getting ref counts if needing to
1536 * keep a pointer to one of those entries) it must be paired with
1537 * addr_location__put(), so that the refcounts can be decremented.
1539 void addr_location__put(struct addr_location *al)
1541 thread__zput(al->thread);
1544 bool is_bts_event(struct perf_event_attr *attr)
1546 return attr->type == PERF_TYPE_HARDWARE &&
1547 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1548 attr->sample_period == 1;
1551 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1553 if (attr->type == PERF_TYPE_SOFTWARE &&
1554 (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1555 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1556 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1559 if (is_bts_event(attr))
1565 void thread__resolve(struct thread *thread, struct addr_location *al,
1566 struct perf_sample *sample)
1568 thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->addr, al);
1570 thread__find_addr_map(thread, sample->cpumode, MAP__VARIABLE,
1573 al->cpu = sample->cpu;
1577 al->sym = map__find_symbol(al->map, al->addr);