12 #include <symbol/kallsyms.h>
15 int machine__init(struct machine *machine, const char *root_dir, pid_t pid)
17 map_groups__init(&machine->kmaps);
18 RB_CLEAR_NODE(&machine->rb_node);
19 INIT_LIST_HEAD(&machine->user_dsos);
20 INIT_LIST_HEAD(&machine->kernel_dsos);
22 machine->threads = RB_ROOT;
23 INIT_LIST_HEAD(&machine->dead_threads);
24 machine->last_match = NULL;
26 machine->kmaps.machine = machine;
29 machine->symbol_filter = NULL;
30 machine->id_hdr_size = 0;
32 machine->root_dir = strdup(root_dir);
33 if (machine->root_dir == NULL)
36 if (pid != HOST_KERNEL_ID) {
37 struct thread *thread = machine__findnew_thread(machine, 0,
44 snprintf(comm, sizeof(comm), "[guest/%d]", pid);
45 thread__set_comm(thread, comm, 0);
51 struct machine *machine__new_host(void)
53 struct machine *machine = malloc(sizeof(*machine));
55 if (machine != NULL) {
56 machine__init(machine, "", HOST_KERNEL_ID);
58 if (machine__create_kernel_maps(machine) < 0)
68 static void dsos__delete(struct list_head *dsos)
72 list_for_each_entry_safe(pos, n, dsos, node) {
78 void machine__delete_dead_threads(struct machine *machine)
82 list_for_each_entry_safe(t, n, &machine->dead_threads, node) {
88 void machine__delete_threads(struct machine *machine)
90 struct rb_node *nd = rb_first(&machine->threads);
93 struct thread *t = rb_entry(nd, struct thread, rb_node);
95 rb_erase(&t->rb_node, &machine->threads);
101 void machine__exit(struct machine *machine)
103 map_groups__exit(&machine->kmaps);
104 dsos__delete(&machine->user_dsos);
105 dsos__delete(&machine->kernel_dsos);
106 zfree(&machine->root_dir);
109 void machine__delete(struct machine *machine)
111 machine__exit(machine);
115 void machines__init(struct machines *machines)
117 machine__init(&machines->host, "", HOST_KERNEL_ID);
118 machines->guests = RB_ROOT;
119 machines->symbol_filter = NULL;
122 void machines__exit(struct machines *machines)
124 machine__exit(&machines->host);
128 struct machine *machines__add(struct machines *machines, pid_t pid,
129 const char *root_dir)
131 struct rb_node **p = &machines->guests.rb_node;
132 struct rb_node *parent = NULL;
133 struct machine *pos, *machine = malloc(sizeof(*machine));
138 if (machine__init(machine, root_dir, pid) != 0) {
143 machine->symbol_filter = machines->symbol_filter;
147 pos = rb_entry(parent, struct machine, rb_node);
154 rb_link_node(&machine->rb_node, parent, p);
155 rb_insert_color(&machine->rb_node, &machines->guests);
160 void machines__set_symbol_filter(struct machines *machines,
161 symbol_filter_t symbol_filter)
165 machines->symbol_filter = symbol_filter;
166 machines->host.symbol_filter = symbol_filter;
168 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
169 struct machine *machine = rb_entry(nd, struct machine, rb_node);
171 machine->symbol_filter = symbol_filter;
175 struct machine *machines__find(struct machines *machines, pid_t pid)
177 struct rb_node **p = &machines->guests.rb_node;
178 struct rb_node *parent = NULL;
179 struct machine *machine;
180 struct machine *default_machine = NULL;
182 if (pid == HOST_KERNEL_ID)
183 return &machines->host;
187 machine = rb_entry(parent, struct machine, rb_node);
188 if (pid < machine->pid)
190 else if (pid > machine->pid)
195 default_machine = machine;
198 return default_machine;
201 struct machine *machines__findnew(struct machines *machines, pid_t pid)
204 const char *root_dir = "";
205 struct machine *machine = machines__find(machines, pid);
207 if (machine && (machine->pid == pid))
210 if ((pid != HOST_KERNEL_ID) &&
211 (pid != DEFAULT_GUEST_KERNEL_ID) &&
212 (symbol_conf.guestmount)) {
213 sprintf(path, "%s/%d", symbol_conf.guestmount, pid);
214 if (access(path, R_OK)) {
215 static struct strlist *seen;
218 seen = strlist__new(true, NULL);
220 if (!strlist__has_entry(seen, path)) {
221 pr_err("Can't access file %s\n", path);
222 strlist__add(seen, path);
230 machine = machines__add(machines, pid, root_dir);
235 void machines__process_guests(struct machines *machines,
236 machine__process_t process, void *data)
240 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
241 struct machine *pos = rb_entry(nd, struct machine, rb_node);
246 char *machine__mmap_name(struct machine *machine, char *bf, size_t size)
248 if (machine__is_host(machine))
249 snprintf(bf, size, "[%s]", "kernel.kallsyms");
250 else if (machine__is_default_guest(machine))
251 snprintf(bf, size, "[%s]", "guest.kernel.kallsyms");
253 snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms",
260 void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size)
262 struct rb_node *node;
263 struct machine *machine;
265 machines->host.id_hdr_size = id_hdr_size;
267 for (node = rb_first(&machines->guests); node; node = rb_next(node)) {
268 machine = rb_entry(node, struct machine, rb_node);
269 machine->id_hdr_size = id_hdr_size;
275 static struct thread *__machine__findnew_thread(struct machine *machine,
276 pid_t pid, pid_t tid,
279 struct rb_node **p = &machine->threads.rb_node;
280 struct rb_node *parent = NULL;
284 * Front-end cache - TID lookups come in blocks,
285 * so most of the time we dont have to look up
288 if (machine->last_match && machine->last_match->tid == tid) {
289 if (pid && pid != machine->last_match->pid_)
290 machine->last_match->pid_ = pid;
291 return machine->last_match;
296 th = rb_entry(parent, struct thread, rb_node);
298 if (th->tid == tid) {
299 machine->last_match = th;
300 if (pid && pid != th->pid_)
314 th = thread__new(pid, tid);
316 rb_link_node(&th->rb_node, parent, p);
317 rb_insert_color(&th->rb_node, &machine->threads);
318 machine->last_match = th;
324 struct thread *machine__findnew_thread(struct machine *machine, pid_t pid,
327 return __machine__findnew_thread(machine, pid, tid, true);
330 struct thread *machine__find_thread(struct machine *machine, pid_t tid)
332 return __machine__findnew_thread(machine, 0, tid, false);
335 int machine__process_comm_event(struct machine *machine, union perf_event *event,
336 struct perf_sample *sample)
338 struct thread *thread = machine__findnew_thread(machine,
343 perf_event__fprintf_comm(event, stdout);
345 if (thread == NULL || thread__set_comm(thread, event->comm.comm, sample->time)) {
346 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
353 int machine__process_lost_event(struct machine *machine __maybe_unused,
354 union perf_event *event, struct perf_sample *sample __maybe_unused)
356 dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
357 event->lost.id, event->lost.lost);
361 struct map *machine__new_module(struct machine *machine, u64 start,
362 const char *filename)
365 struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename);
370 map = map__new2(start, dso, MAP__FUNCTION);
374 if (machine__is_host(machine))
375 dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE;
377 dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE;
378 map_groups__insert(&machine->kmaps, map);
382 size_t machines__fprintf_dsos(struct machines *machines, FILE *fp)
385 size_t ret = __dsos__fprintf(&machines->host.kernel_dsos, fp) +
386 __dsos__fprintf(&machines->host.user_dsos, fp);
388 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
389 struct machine *pos = rb_entry(nd, struct machine, rb_node);
390 ret += __dsos__fprintf(&pos->kernel_dsos, fp);
391 ret += __dsos__fprintf(&pos->user_dsos, fp);
397 size_t machine__fprintf_dsos_buildid(struct machine *machine, FILE *fp,
398 bool (skip)(struct dso *dso, int parm), int parm)
400 return __dsos__fprintf_buildid(&machine->kernel_dsos, fp, skip, parm) +
401 __dsos__fprintf_buildid(&machine->user_dsos, fp, skip, parm);
404 size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp,
405 bool (skip)(struct dso *dso, int parm), int parm)
408 size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm);
410 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
411 struct machine *pos = rb_entry(nd, struct machine, rb_node);
412 ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm);
417 size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp)
421 struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso;
423 if (kdso->has_build_id) {
424 char filename[PATH_MAX];
425 if (dso__build_id_filename(kdso, filename, sizeof(filename)))
426 printed += fprintf(fp, "[0] %s\n", filename);
429 for (i = 0; i < vmlinux_path__nr_entries; ++i)
430 printed += fprintf(fp, "[%d] %s\n",
431 i + kdso->has_build_id, vmlinux_path[i]);
436 size_t machine__fprintf(struct machine *machine, FILE *fp)
441 for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) {
442 struct thread *pos = rb_entry(nd, struct thread, rb_node);
444 ret += thread__fprintf(pos, fp);
450 static struct dso *machine__get_kernel(struct machine *machine)
452 const char *vmlinux_name = NULL;
455 if (machine__is_host(machine)) {
456 vmlinux_name = symbol_conf.vmlinux_name;
458 vmlinux_name = "[kernel.kallsyms]";
460 kernel = dso__kernel_findnew(machine, vmlinux_name,
466 if (machine__is_default_guest(machine))
467 vmlinux_name = symbol_conf.default_guest_vmlinux_name;
469 vmlinux_name = machine__mmap_name(machine, bf,
472 kernel = dso__kernel_findnew(machine, vmlinux_name,
474 DSO_TYPE_GUEST_KERNEL);
477 if (kernel != NULL && (!kernel->has_build_id))
478 dso__read_running_kernel_build_id(kernel, machine);
483 struct process_args {
487 static int symbol__in_kernel(void *arg, const char *name,
488 char type __maybe_unused, u64 start)
490 struct process_args *args = arg;
492 if (strchr(name, '['))
499 static void machine__get_kallsyms_filename(struct machine *machine, char *buf,
502 if (machine__is_default_guest(machine))
503 scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms);
505 scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir);
508 /* Figure out the start address of kernel map from /proc/kallsyms */
509 static u64 machine__get_kernel_start_addr(struct machine *machine)
511 char filename[PATH_MAX];
512 struct process_args args;
514 machine__get_kallsyms_filename(machine, filename, PATH_MAX);
516 if (symbol__restricted_filename(filename, "/proc/kallsyms"))
519 if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0)
525 int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel)
528 u64 start = machine__get_kernel_start_addr(machine);
530 for (type = 0; type < MAP__NR_TYPES; ++type) {
533 machine->vmlinux_maps[type] = map__new2(start, kernel, type);
534 if (machine->vmlinux_maps[type] == NULL)
537 machine->vmlinux_maps[type]->map_ip =
538 machine->vmlinux_maps[type]->unmap_ip =
540 kmap = map__kmap(machine->vmlinux_maps[type]);
541 kmap->kmaps = &machine->kmaps;
542 map_groups__insert(&machine->kmaps,
543 machine->vmlinux_maps[type]);
549 void machine__destroy_kernel_maps(struct machine *machine)
553 for (type = 0; type < MAP__NR_TYPES; ++type) {
556 if (machine->vmlinux_maps[type] == NULL)
559 kmap = map__kmap(machine->vmlinux_maps[type]);
560 map_groups__remove(&machine->kmaps,
561 machine->vmlinux_maps[type]);
562 if (kmap->ref_reloc_sym) {
564 * ref_reloc_sym is shared among all maps, so free just
567 if (type == MAP__FUNCTION) {
568 zfree((char **)&kmap->ref_reloc_sym->name);
569 zfree(&kmap->ref_reloc_sym);
571 kmap->ref_reloc_sym = NULL;
574 map__delete(machine->vmlinux_maps[type]);
575 machine->vmlinux_maps[type] = NULL;
579 int machines__create_guest_kernel_maps(struct machines *machines)
582 struct dirent **namelist = NULL;
588 if (symbol_conf.default_guest_vmlinux_name ||
589 symbol_conf.default_guest_modules ||
590 symbol_conf.default_guest_kallsyms) {
591 machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID);
594 if (symbol_conf.guestmount) {
595 items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL);
598 for (i = 0; i < items; i++) {
599 if (!isdigit(namelist[i]->d_name[0])) {
600 /* Filter out . and .. */
603 pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10);
604 if ((*endp != '\0') ||
605 (endp == namelist[i]->d_name) ||
607 pr_debug("invalid directory (%s). Skipping.\n",
608 namelist[i]->d_name);
611 sprintf(path, "%s/%s/proc/kallsyms",
612 symbol_conf.guestmount,
613 namelist[i]->d_name);
614 ret = access(path, R_OK);
616 pr_debug("Can't access file %s\n", path);
619 machines__create_kernel_maps(machines, pid);
628 void machines__destroy_kernel_maps(struct machines *machines)
630 struct rb_node *next = rb_first(&machines->guests);
632 machine__destroy_kernel_maps(&machines->host);
635 struct machine *pos = rb_entry(next, struct machine, rb_node);
637 next = rb_next(&pos->rb_node);
638 rb_erase(&pos->rb_node, &machines->guests);
639 machine__delete(pos);
643 int machines__create_kernel_maps(struct machines *machines, pid_t pid)
645 struct machine *machine = machines__findnew(machines, pid);
650 return machine__create_kernel_maps(machine);
653 int machine__load_kallsyms(struct machine *machine, const char *filename,
654 enum map_type type, symbol_filter_t filter)
656 struct map *map = machine->vmlinux_maps[type];
657 int ret = dso__load_kallsyms(map->dso, filename, map, filter);
660 dso__set_loaded(map->dso, type);
662 * Since /proc/kallsyms will have multiple sessions for the
663 * kernel, with modules between them, fixup the end of all
666 __map_groups__fixup_end(&machine->kmaps, type);
672 int machine__load_vmlinux_path(struct machine *machine, enum map_type type,
673 symbol_filter_t filter)
675 struct map *map = machine->vmlinux_maps[type];
676 int ret = dso__load_vmlinux_path(map->dso, map, filter);
679 dso__set_loaded(map->dso, type);
684 static void map_groups__fixup_end(struct map_groups *mg)
687 for (i = 0; i < MAP__NR_TYPES; ++i)
688 __map_groups__fixup_end(mg, i);
691 static char *get_kernel_version(const char *root_dir)
693 char version[PATH_MAX];
696 const char *prefix = "Linux version ";
698 sprintf(version, "%s/proc/version", root_dir);
699 file = fopen(version, "r");
704 tmp = fgets(version, sizeof(version), file);
707 name = strstr(version, prefix);
710 name += strlen(prefix);
711 tmp = strchr(name, ' ');
718 static int map_groups__set_modules_path_dir(struct map_groups *mg,
719 const char *dir_name)
722 DIR *dir = opendir(dir_name);
726 pr_debug("%s: cannot open %s dir\n", __func__, dir_name);
730 while ((dent = readdir(dir)) != NULL) {
734 /*sshfs might return bad dent->d_type, so we have to stat*/
735 snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name);
739 if (S_ISDIR(st.st_mode)) {
740 if (!strcmp(dent->d_name, ".") ||
741 !strcmp(dent->d_name, ".."))
744 ret = map_groups__set_modules_path_dir(mg, path);
748 char *dot = strrchr(dent->d_name, '.'),
753 if (dot == NULL || strcmp(dot, ".ko"))
755 snprintf(dso_name, sizeof(dso_name), "[%.*s]",
756 (int)(dot - dent->d_name), dent->d_name);
758 strxfrchar(dso_name, '-', '_');
759 map = map_groups__find_by_name(mg, MAP__FUNCTION,
764 long_name = strdup(path);
765 if (long_name == NULL) {
769 dso__set_long_name(map->dso, long_name, true);
770 dso__kernel_module_get_build_id(map->dso, "");
779 static int machine__set_modules_path(struct machine *machine)
782 char modules_path[PATH_MAX];
784 version = get_kernel_version(machine->root_dir);
788 snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel",
789 machine->root_dir, version);
792 return map_groups__set_modules_path_dir(&machine->kmaps, modules_path);
795 static int machine__create_module(void *arg, const char *name, u64 start)
797 struct machine *machine = arg;
800 map = machine__new_module(machine, start, name);
804 dso__kernel_module_get_build_id(map->dso, machine->root_dir);
809 static int machine__create_modules(struct machine *machine)
814 if (machine__is_default_guest(machine)) {
815 modules = symbol_conf.default_guest_modules;
817 snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir);
821 if (symbol__restricted_filename(modules, "/proc/modules"))
824 if (modules__parse(modules, machine, machine__create_module))
827 if (!machine__set_modules_path(machine))
830 pr_debug("Problems setting modules path maps, continuing anyway...\n");
835 int machine__create_kernel_maps(struct machine *machine)
837 struct dso *kernel = machine__get_kernel(machine);
839 if (kernel == NULL ||
840 __machine__create_kernel_maps(machine, kernel) < 0)
843 if (symbol_conf.use_modules && machine__create_modules(machine) < 0) {
844 if (machine__is_host(machine))
845 pr_debug("Problems creating module maps, "
846 "continuing anyway...\n");
848 pr_debug("Problems creating module maps for guest %d, "
849 "continuing anyway...\n", machine->pid);
853 * Now that we have all the maps created, just set the ->end of them:
855 map_groups__fixup_end(&machine->kmaps);
859 static void machine__set_kernel_mmap_len(struct machine *machine,
860 union perf_event *event)
864 for (i = 0; i < MAP__NR_TYPES; i++) {
865 machine->vmlinux_maps[i]->start = event->mmap.start;
866 machine->vmlinux_maps[i]->end = (event->mmap.start +
869 * Be a bit paranoid here, some perf.data file came with
870 * a zero sized synthesized MMAP event for the kernel.
872 if (machine->vmlinux_maps[i]->end == 0)
873 machine->vmlinux_maps[i]->end = ~0ULL;
877 static bool machine__uses_kcore(struct machine *machine)
881 list_for_each_entry(dso, &machine->kernel_dsos, node) {
882 if (dso__is_kcore(dso))
889 static int machine__process_kernel_mmap_event(struct machine *machine,
890 union perf_event *event)
893 char kmmap_prefix[PATH_MAX];
894 enum dso_kernel_type kernel_type;
897 /* If we have maps from kcore then we do not need or want any others */
898 if (machine__uses_kcore(machine))
901 machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
902 if (machine__is_host(machine))
903 kernel_type = DSO_TYPE_KERNEL;
905 kernel_type = DSO_TYPE_GUEST_KERNEL;
907 is_kernel_mmap = memcmp(event->mmap.filename,
909 strlen(kmmap_prefix) - 1) == 0;
910 if (event->mmap.filename[0] == '/' ||
911 (!is_kernel_mmap && event->mmap.filename[0] == '[')) {
913 char short_module_name[1024];
916 if (event->mmap.filename[0] == '/') {
917 name = strrchr(event->mmap.filename, '/');
922 dot = strrchr(name, '.');
925 snprintf(short_module_name, sizeof(short_module_name),
926 "[%.*s]", (int)(dot - name), name);
927 strxfrchar(short_module_name, '-', '_');
929 strcpy(short_module_name, event->mmap.filename);
931 map = machine__new_module(machine, event->mmap.start,
932 event->mmap.filename);
936 name = strdup(short_module_name);
940 dso__set_short_name(map->dso, name, true);
941 map->end = map->start + event->mmap.len;
942 } else if (is_kernel_mmap) {
943 const char *symbol_name = (event->mmap.filename +
944 strlen(kmmap_prefix));
946 * Should be there already, from the build-id table in
949 struct dso *kernel = __dsos__findnew(&machine->kernel_dsos,
954 kernel->kernel = kernel_type;
955 if (__machine__create_kernel_maps(machine, kernel) < 0)
958 machine__set_kernel_mmap_len(machine, event);
961 * Avoid using a zero address (kptr_restrict) for the ref reloc
962 * symbol. Effectively having zero here means that at record
963 * time /proc/sys/kernel/kptr_restrict was non zero.
965 if (event->mmap.pgoff != 0) {
966 maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
971 if (machine__is_default_guest(machine)) {
973 * preload dso of guest kernel and modules
975 dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION],
984 int machine__process_mmap2_event(struct machine *machine,
985 union perf_event *event,
986 struct perf_sample *sample __maybe_unused)
988 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
989 struct thread *thread;
995 perf_event__fprintf_mmap2(event, stdout);
997 if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
998 cpumode == PERF_RECORD_MISC_KERNEL) {
999 ret = machine__process_kernel_mmap_event(machine, event);
1005 thread = machine__findnew_thread(machine, event->mmap2.pid,
1010 if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA)
1011 type = MAP__VARIABLE;
1013 type = MAP__FUNCTION;
1015 map = map__new(&machine->user_dsos, event->mmap2.start,
1016 event->mmap2.len, event->mmap2.pgoff,
1017 event->mmap2.pid, event->mmap2.maj,
1018 event->mmap2.min, event->mmap2.ino,
1019 event->mmap2.ino_generation,
1020 event->mmap2.filename, type);
1025 thread__insert_map(thread, map);
1029 dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n");
1033 int machine__process_mmap_event(struct machine *machine, union perf_event *event,
1034 struct perf_sample *sample __maybe_unused)
1036 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1037 struct thread *thread;
1043 perf_event__fprintf_mmap(event, stdout);
1045 if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
1046 cpumode == PERF_RECORD_MISC_KERNEL) {
1047 ret = machine__process_kernel_mmap_event(machine, event);
1053 thread = machine__findnew_thread(machine, event->mmap.pid,
1058 if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA)
1059 type = MAP__VARIABLE;
1061 type = MAP__FUNCTION;
1063 map = map__new(&machine->user_dsos, event->mmap.start,
1064 event->mmap.len, event->mmap.pgoff,
1065 event->mmap.pid, 0, 0, 0, 0,
1066 event->mmap.filename,
1072 thread__insert_map(thread, map);
1076 dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
1080 static void machine__remove_thread(struct machine *machine, struct thread *th)
1082 machine->last_match = NULL;
1083 rb_erase(&th->rb_node, &machine->threads);
1085 * We may have references to this thread, for instance in some hist_entry
1086 * instances, so just move them to a separate list.
1088 list_add_tail(&th->node, &machine->dead_threads);
1091 int machine__process_fork_event(struct machine *machine, union perf_event *event,
1092 struct perf_sample *sample)
1094 struct thread *thread = machine__find_thread(machine, event->fork.tid);
1095 struct thread *parent = machine__findnew_thread(machine,
1099 /* if a thread currently exists for the thread id remove it */
1101 machine__remove_thread(machine, thread);
1103 thread = machine__findnew_thread(machine, event->fork.pid,
1106 perf_event__fprintf_task(event, stdout);
1108 if (thread == NULL || parent == NULL ||
1109 thread__fork(thread, parent, sample->time) < 0) {
1110 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
1117 int machine__process_exit_event(struct machine *machine, union perf_event *event,
1118 struct perf_sample *sample __maybe_unused)
1120 struct thread *thread = machine__find_thread(machine, event->fork.tid);
1123 perf_event__fprintf_task(event, stdout);
1126 thread__exited(thread);
1131 int machine__process_event(struct machine *machine, union perf_event *event,
1132 struct perf_sample *sample)
1136 switch (event->header.type) {
1137 case PERF_RECORD_COMM:
1138 ret = machine__process_comm_event(machine, event, sample); break;
1139 case PERF_RECORD_MMAP:
1140 ret = machine__process_mmap_event(machine, event, sample); break;
1141 case PERF_RECORD_MMAP2:
1142 ret = machine__process_mmap2_event(machine, event, sample); break;
1143 case PERF_RECORD_FORK:
1144 ret = machine__process_fork_event(machine, event, sample); break;
1145 case PERF_RECORD_EXIT:
1146 ret = machine__process_exit_event(machine, event, sample); break;
1147 case PERF_RECORD_LOST:
1148 ret = machine__process_lost_event(machine, event, sample); break;
1157 static bool symbol__match_regex(struct symbol *sym, regex_t *regex)
1159 if (sym->name && !regexec(regex, sym->name, 0, NULL, 0))
1164 static const u8 cpumodes[] = {
1165 PERF_RECORD_MISC_USER,
1166 PERF_RECORD_MISC_KERNEL,
1167 PERF_RECORD_MISC_GUEST_USER,
1168 PERF_RECORD_MISC_GUEST_KERNEL
1170 #define NCPUMODES (sizeof(cpumodes)/sizeof(u8))
1172 static void ip__resolve_ams(struct machine *machine, struct thread *thread,
1173 struct addr_map_symbol *ams,
1176 struct addr_location al;
1180 memset(&al, 0, sizeof(al));
1182 for (i = 0; i < NCPUMODES; i++) {
1185 * We cannot use the header.misc hint to determine whether a
1186 * branch stack address is user, kernel, guest, hypervisor.
1187 * Branches may straddle the kernel/user/hypervisor boundaries.
1188 * Thus, we have to try consecutively until we find a match
1189 * or else, the symbol is unknown
1191 thread__find_addr_location(thread, machine, m, MAP__FUNCTION,
1198 ams->al_addr = al.addr;
1203 static void ip__resolve_data(struct machine *machine, struct thread *thread,
1204 u8 m, struct addr_map_symbol *ams, u64 addr)
1206 struct addr_location al;
1208 memset(&al, 0, sizeof(al));
1210 thread__find_addr_location(thread, machine, m, MAP__VARIABLE, addr,
1213 ams->al_addr = al.addr;
1218 struct mem_info *machine__resolve_mem(struct machine *machine,
1220 struct perf_sample *sample,
1223 struct mem_info *mi = zalloc(sizeof(*mi));
1228 ip__resolve_ams(machine, thr, &mi->iaddr, sample->ip);
1229 ip__resolve_data(machine, thr, cpumode, &mi->daddr, sample->addr);
1230 mi->data_src.val = sample->data_src;
1235 struct branch_info *machine__resolve_bstack(struct machine *machine,
1237 struct branch_stack *bs)
1239 struct branch_info *bi;
1242 bi = calloc(bs->nr, sizeof(struct branch_info));
1246 for (i = 0; i < bs->nr; i++) {
1247 ip__resolve_ams(machine, thr, &bi[i].to, bs->entries[i].to);
1248 ip__resolve_ams(machine, thr, &bi[i].from, bs->entries[i].from);
1249 bi[i].flags = bs->entries[i].flags;
1254 static int machine__resolve_callchain_sample(struct machine *machine,
1255 struct thread *thread,
1256 struct ip_callchain *chain,
1257 struct symbol **parent,
1258 struct addr_location *root_al,
1261 u8 cpumode = PERF_RECORD_MISC_USER;
1262 int chain_nr = min(max_stack, (int)chain->nr);
1266 callchain_cursor_reset(&callchain_cursor);
1268 if (chain->nr > PERF_MAX_STACK_DEPTH) {
1269 pr_warning("corrupted callchain. skipping...\n");
1273 for (i = 0; i < chain_nr; i++) {
1275 struct addr_location al;
1277 if (callchain_param.order == ORDER_CALLEE)
1280 ip = chain->ips[chain->nr - i - 1];
1282 if (ip >= PERF_CONTEXT_MAX) {
1284 case PERF_CONTEXT_HV:
1285 cpumode = PERF_RECORD_MISC_HYPERVISOR;
1287 case PERF_CONTEXT_KERNEL:
1288 cpumode = PERF_RECORD_MISC_KERNEL;
1290 case PERF_CONTEXT_USER:
1291 cpumode = PERF_RECORD_MISC_USER;
1294 pr_debug("invalid callchain context: "
1295 "%"PRId64"\n", (s64) ip);
1297 * It seems the callchain is corrupted.
1300 callchain_cursor_reset(&callchain_cursor);
1306 al.filtered = false;
1307 thread__find_addr_location(thread, machine, cpumode,
1308 MAP__FUNCTION, ip, &al);
1309 if (al.sym != NULL) {
1310 if (sort__has_parent && !*parent &&
1311 symbol__match_regex(al.sym, &parent_regex))
1313 else if (have_ignore_callees && root_al &&
1314 symbol__match_regex(al.sym, &ignore_callees_regex)) {
1315 /* Treat this symbol as the root,
1316 forgetting its callees. */
1318 callchain_cursor_reset(&callchain_cursor);
1322 err = callchain_cursor_append(&callchain_cursor,
1323 ip, al.map, al.sym);
1331 static int unwind_entry(struct unwind_entry *entry, void *arg)
1333 struct callchain_cursor *cursor = arg;
1334 return callchain_cursor_append(cursor, entry->ip,
1335 entry->map, entry->sym);
1338 int machine__resolve_callchain(struct machine *machine,
1339 struct perf_evsel *evsel,
1340 struct thread *thread,
1341 struct perf_sample *sample,
1342 struct symbol **parent,
1343 struct addr_location *root_al,
1348 ret = machine__resolve_callchain_sample(machine, thread,
1349 sample->callchain, parent,
1350 root_al, max_stack);
1354 /* Can we do dwarf post unwind? */
1355 if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) &&
1356 (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER)))
1359 /* Bail out if nothing was captured. */
1360 if ((!sample->user_regs.regs) ||
1361 (!sample->user_stack.size))
1364 return unwind__get_entries(unwind_entry, &callchain_cursor, machine,
1365 thread, evsel->attr.sample_regs_user,
1370 int machine__for_each_thread(struct machine *machine,
1371 int (*fn)(struct thread *thread, void *p),
1375 struct thread *thread;
1378 for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) {
1379 thread = rb_entry(nd, struct thread, rb_node);
1380 rc = fn(thread, priv);
1385 list_for_each_entry(thread, &machine->dead_threads, node) {
1386 rc = fn(thread, priv);
1393 int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
1394 struct target *target, struct thread_map *threads,
1395 perf_event__handler_t process, bool data_mmap)
1397 if (target__has_task(target))
1398 return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap);
1399 else if (target__has_cpu(target))
1400 return perf_event__synthesize_threads(tool, process, machine, data_mmap);
1401 /* command specified */