1 // SPDX-License-Identifier: GPL-2.0
18 #include <sys/types.h>
22 #include "linux/hash.h"
25 #include "sane_ctype.h"
26 #include <symbol/kallsyms.h>
27 #include <linux/mman.h>
29 static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock);
31 static void dsos__init(struct dsos *dsos)
33 INIT_LIST_HEAD(&dsos->head);
35 init_rwsem(&dsos->lock);
38 static void machine__threads_init(struct machine *machine)
42 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
43 struct threads *threads = &machine->threads[i];
44 threads->entries = RB_ROOT;
45 init_rwsem(&threads->lock);
47 INIT_LIST_HEAD(&threads->dead);
48 threads->last_match = NULL;
52 static int machine__set_mmap_name(struct machine *machine)
54 if (machine__is_host(machine))
55 machine->mmap_name = strdup("[kernel.kallsyms]");
56 else if (machine__is_default_guest(machine))
57 machine->mmap_name = strdup("[guest.kernel.kallsyms]");
58 else if (asprintf(&machine->mmap_name, "[guest.kernel.kallsyms.%d]",
60 machine->mmap_name = NULL;
62 return machine->mmap_name ? 0 : -ENOMEM;
65 int machine__init(struct machine *machine, const char *root_dir, pid_t pid)
69 memset(machine, 0, sizeof(*machine));
70 map_groups__init(&machine->kmaps, machine);
71 RB_CLEAR_NODE(&machine->rb_node);
72 dsos__init(&machine->dsos);
74 machine__threads_init(machine);
76 machine->vdso_info = NULL;
81 machine->id_hdr_size = 0;
82 machine->kptr_restrict_warned = false;
83 machine->comm_exec = false;
84 machine->kernel_start = 0;
85 machine->vmlinux_map = NULL;
87 machine->root_dir = strdup(root_dir);
88 if (machine->root_dir == NULL)
91 if (machine__set_mmap_name(machine))
94 if (pid != HOST_KERNEL_ID) {
95 struct thread *thread = machine__findnew_thread(machine, -1,
102 snprintf(comm, sizeof(comm), "[guest/%d]", pid);
103 thread__set_comm(thread, comm, 0);
107 machine->current_tid = NULL;
112 zfree(&machine->root_dir);
113 zfree(&machine->mmap_name);
118 struct machine *machine__new_host(void)
120 struct machine *machine = malloc(sizeof(*machine));
122 if (machine != NULL) {
123 machine__init(machine, "", HOST_KERNEL_ID);
125 if (machine__create_kernel_maps(machine) < 0)
135 struct machine *machine__new_kallsyms(void)
137 struct machine *machine = machine__new_host();
140 * 1) We should switch to machine__load_kallsyms(), i.e. not explicitely
141 * ask for not using the kcore parsing code, once this one is fixed
142 * to create a map per module.
144 if (machine && machine__load_kallsyms(machine, "/proc/kallsyms") <= 0) {
145 machine__delete(machine);
152 static void dsos__purge(struct dsos *dsos)
156 down_write(&dsos->lock);
158 list_for_each_entry_safe(pos, n, &dsos->head, node) {
159 RB_CLEAR_NODE(&pos->rb_node);
161 list_del_init(&pos->node);
165 up_write(&dsos->lock);
168 static void dsos__exit(struct dsos *dsos)
171 exit_rwsem(&dsos->lock);
174 void machine__delete_threads(struct machine *machine)
179 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
180 struct threads *threads = &machine->threads[i];
181 down_write(&threads->lock);
182 nd = rb_first(&threads->entries);
184 struct thread *t = rb_entry(nd, struct thread, rb_node);
187 __machine__remove_thread(machine, t, false);
189 up_write(&threads->lock);
193 void machine__exit(struct machine *machine)
200 machine__destroy_kernel_maps(machine);
201 map_groups__exit(&machine->kmaps);
202 dsos__exit(&machine->dsos);
203 machine__exit_vdso(machine);
204 zfree(&machine->root_dir);
205 zfree(&machine->mmap_name);
206 zfree(&machine->current_tid);
208 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
209 struct threads *threads = &machine->threads[i];
210 exit_rwsem(&threads->lock);
214 void machine__delete(struct machine *machine)
217 machine__exit(machine);
222 void machines__init(struct machines *machines)
224 machine__init(&machines->host, "", HOST_KERNEL_ID);
225 machines->guests = RB_ROOT;
228 void machines__exit(struct machines *machines)
230 machine__exit(&machines->host);
234 struct machine *machines__add(struct machines *machines, pid_t pid,
235 const char *root_dir)
237 struct rb_node **p = &machines->guests.rb_node;
238 struct rb_node *parent = NULL;
239 struct machine *pos, *machine = malloc(sizeof(*machine));
244 if (machine__init(machine, root_dir, pid) != 0) {
251 pos = rb_entry(parent, struct machine, rb_node);
258 rb_link_node(&machine->rb_node, parent, p);
259 rb_insert_color(&machine->rb_node, &machines->guests);
264 void machines__set_comm_exec(struct machines *machines, bool comm_exec)
268 machines->host.comm_exec = comm_exec;
270 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
271 struct machine *machine = rb_entry(nd, struct machine, rb_node);
273 machine->comm_exec = comm_exec;
277 struct machine *machines__find(struct machines *machines, pid_t pid)
279 struct rb_node **p = &machines->guests.rb_node;
280 struct rb_node *parent = NULL;
281 struct machine *machine;
282 struct machine *default_machine = NULL;
284 if (pid == HOST_KERNEL_ID)
285 return &machines->host;
289 machine = rb_entry(parent, struct machine, rb_node);
290 if (pid < machine->pid)
292 else if (pid > machine->pid)
297 default_machine = machine;
300 return default_machine;
303 struct machine *machines__findnew(struct machines *machines, pid_t pid)
306 const char *root_dir = "";
307 struct machine *machine = machines__find(machines, pid);
309 if (machine && (machine->pid == pid))
312 if ((pid != HOST_KERNEL_ID) &&
313 (pid != DEFAULT_GUEST_KERNEL_ID) &&
314 (symbol_conf.guestmount)) {
315 sprintf(path, "%s/%d", symbol_conf.guestmount, pid);
316 if (access(path, R_OK)) {
317 static struct strlist *seen;
320 seen = strlist__new(NULL, NULL);
322 if (!strlist__has_entry(seen, path)) {
323 pr_err("Can't access file %s\n", path);
324 strlist__add(seen, path);
332 machine = machines__add(machines, pid, root_dir);
337 void machines__process_guests(struct machines *machines,
338 machine__process_t process, void *data)
342 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
343 struct machine *pos = rb_entry(nd, struct machine, rb_node);
348 void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size)
350 struct rb_node *node;
351 struct machine *machine;
353 machines->host.id_hdr_size = id_hdr_size;
355 for (node = rb_first(&machines->guests); node; node = rb_next(node)) {
356 machine = rb_entry(node, struct machine, rb_node);
357 machine->id_hdr_size = id_hdr_size;
363 static void machine__update_thread_pid(struct machine *machine,
364 struct thread *th, pid_t pid)
366 struct thread *leader;
368 if (pid == th->pid_ || pid == -1 || th->pid_ != -1)
373 if (th->pid_ == th->tid)
376 leader = __machine__findnew_thread(machine, th->pid_, th->pid_);
381 leader->mg = map_groups__new(machine);
386 if (th->mg == leader->mg)
391 * Maps are created from MMAP events which provide the pid and
392 * tid. Consequently there never should be any maps on a thread
393 * with an unknown pid. Just print an error if there are.
395 if (!map_groups__empty(th->mg))
396 pr_err("Discarding thread maps for %d:%d\n",
398 map_groups__put(th->mg);
401 th->mg = map_groups__get(leader->mg);
406 pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid);
411 * Caller must eventually drop thread->refcnt returned with a successful
412 * lookup/new thread inserted.
414 static struct thread *____machine__findnew_thread(struct machine *machine,
415 struct threads *threads,
416 pid_t pid, pid_t tid,
419 struct rb_node **p = &threads->entries.rb_node;
420 struct rb_node *parent = NULL;
424 * Front-end cache - TID lookups come in blocks,
425 * so most of the time we dont have to look up
428 th = threads->last_match;
430 if (th->tid == tid) {
431 machine__update_thread_pid(machine, th, pid);
432 return thread__get(th);
435 threads->last_match = NULL;
440 th = rb_entry(parent, struct thread, rb_node);
442 if (th->tid == tid) {
443 threads->last_match = th;
444 machine__update_thread_pid(machine, th, pid);
445 return thread__get(th);
457 th = thread__new(pid, tid);
459 rb_link_node(&th->rb_node, parent, p);
460 rb_insert_color(&th->rb_node, &threads->entries);
463 * We have to initialize map_groups separately
464 * after rb tree is updated.
466 * The reason is that we call machine__findnew_thread
467 * within thread__init_map_groups to find the thread
468 * leader and that would screwed the rb tree.
470 if (thread__init_map_groups(th, machine)) {
471 rb_erase_init(&th->rb_node, &threads->entries);
472 RB_CLEAR_NODE(&th->rb_node);
477 * It is now in the rbtree, get a ref
480 threads->last_match = th;
487 struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid)
489 return ____machine__findnew_thread(machine, machine__threads(machine, tid), pid, tid, true);
492 struct thread *machine__findnew_thread(struct machine *machine, pid_t pid,
495 struct threads *threads = machine__threads(machine, tid);
498 down_write(&threads->lock);
499 th = __machine__findnew_thread(machine, pid, tid);
500 up_write(&threads->lock);
504 struct thread *machine__find_thread(struct machine *machine, pid_t pid,
507 struct threads *threads = machine__threads(machine, tid);
510 down_read(&threads->lock);
511 th = ____machine__findnew_thread(machine, threads, pid, tid, false);
512 up_read(&threads->lock);
516 struct comm *machine__thread_exec_comm(struct machine *machine,
517 struct thread *thread)
519 if (machine->comm_exec)
520 return thread__exec_comm(thread);
522 return thread__comm(thread);
525 int machine__process_comm_event(struct machine *machine, union perf_event *event,
526 struct perf_sample *sample)
528 struct thread *thread = machine__findnew_thread(machine,
531 bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC;
535 machine->comm_exec = true;
538 perf_event__fprintf_comm(event, stdout);
540 if (thread == NULL ||
541 __thread__set_comm(thread, event->comm.comm, sample->time, exec)) {
542 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
551 int machine__process_namespaces_event(struct machine *machine __maybe_unused,
552 union perf_event *event,
553 struct perf_sample *sample __maybe_unused)
555 struct thread *thread = machine__findnew_thread(machine,
556 event->namespaces.pid,
557 event->namespaces.tid);
560 WARN_ONCE(event->namespaces.nr_namespaces > NR_NAMESPACES,
561 "\nWARNING: kernel seems to support more namespaces than perf"
562 " tool.\nTry updating the perf tool..\n\n");
564 WARN_ONCE(event->namespaces.nr_namespaces < NR_NAMESPACES,
565 "\nWARNING: perf tool seems to support more namespaces than"
566 " the kernel.\nTry updating the kernel..\n\n");
569 perf_event__fprintf_namespaces(event, stdout);
571 if (thread == NULL ||
572 thread__set_namespaces(thread, sample->time, &event->namespaces)) {
573 dump_printf("problem processing PERF_RECORD_NAMESPACES, skipping event.\n");
582 int machine__process_lost_event(struct machine *machine __maybe_unused,
583 union perf_event *event, struct perf_sample *sample __maybe_unused)
585 dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
586 event->lost.id, event->lost.lost);
590 int machine__process_lost_samples_event(struct machine *machine __maybe_unused,
591 union perf_event *event, struct perf_sample *sample)
593 dump_printf(": id:%" PRIu64 ": lost samples :%" PRIu64 "\n",
594 sample->id, event->lost_samples.lost);
598 static struct dso *machine__findnew_module_dso(struct machine *machine,
600 const char *filename)
604 down_write(&machine->dsos.lock);
606 dso = __dsos__find(&machine->dsos, m->name, true);
608 dso = __dsos__addnew(&machine->dsos, m->name);
612 dso__set_module_info(dso, m, machine);
613 dso__set_long_name(dso, strdup(filename), true);
618 up_write(&machine->dsos.lock);
622 int machine__process_aux_event(struct machine *machine __maybe_unused,
623 union perf_event *event)
626 perf_event__fprintf_aux(event, stdout);
630 int machine__process_itrace_start_event(struct machine *machine __maybe_unused,
631 union perf_event *event)
634 perf_event__fprintf_itrace_start(event, stdout);
638 int machine__process_switch_event(struct machine *machine __maybe_unused,
639 union perf_event *event)
642 perf_event__fprintf_switch(event, stdout);
646 static void dso__adjust_kmod_long_name(struct dso *dso, const char *filename)
648 const char *dup_filename;
650 if (!filename || !dso || !dso->long_name)
652 if (dso->long_name[0] != '[')
654 if (!strchr(filename, '/'))
657 dup_filename = strdup(filename);
661 dso__set_long_name(dso, dup_filename, true);
664 struct map *machine__findnew_module_map(struct machine *machine, u64 start,
665 const char *filename)
667 struct map *map = NULL;
668 struct dso *dso = NULL;
671 if (kmod_path__parse_name(&m, filename))
674 map = map_groups__find_by_name(&machine->kmaps, m.name);
677 * If the map's dso is an offline module, give dso__load()
678 * a chance to find the file path of that module by fixing
681 dso__adjust_kmod_long_name(map->dso, filename);
685 dso = machine__findnew_module_dso(machine, &m, filename);
689 map = map__new2(start, dso);
693 map_groups__insert(&machine->kmaps, map);
695 /* Put the map here because map_groups__insert alread got it */
698 /* put the dso here, corresponding to machine__findnew_module_dso */
704 size_t machines__fprintf_dsos(struct machines *machines, FILE *fp)
707 size_t ret = __dsos__fprintf(&machines->host.dsos.head, fp);
709 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
710 struct machine *pos = rb_entry(nd, struct machine, rb_node);
711 ret += __dsos__fprintf(&pos->dsos.head, fp);
717 size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp,
718 bool (skip)(struct dso *dso, int parm), int parm)
720 return __dsos__fprintf_buildid(&m->dsos.head, fp, skip, parm);
723 size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp,
724 bool (skip)(struct dso *dso, int parm), int parm)
727 size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm);
729 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
730 struct machine *pos = rb_entry(nd, struct machine, rb_node);
731 ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm);
736 size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp)
740 struct dso *kdso = machine__kernel_map(machine)->dso;
742 if (kdso->has_build_id) {
743 char filename[PATH_MAX];
744 if (dso__build_id_filename(kdso, filename, sizeof(filename),
746 printed += fprintf(fp, "[0] %s\n", filename);
749 for (i = 0; i < vmlinux_path__nr_entries; ++i)
750 printed += fprintf(fp, "[%d] %s\n",
751 i + kdso->has_build_id, vmlinux_path[i]);
756 size_t machine__fprintf(struct machine *machine, FILE *fp)
762 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
763 struct threads *threads = &machine->threads[i];
765 down_read(&threads->lock);
767 ret = fprintf(fp, "Threads: %u\n", threads->nr);
769 for (nd = rb_first(&threads->entries); nd; nd = rb_next(nd)) {
770 struct thread *pos = rb_entry(nd, struct thread, rb_node);
772 ret += thread__fprintf(pos, fp);
775 up_read(&threads->lock);
780 static struct dso *machine__get_kernel(struct machine *machine)
782 const char *vmlinux_name = machine->mmap_name;
785 if (machine__is_host(machine)) {
786 if (symbol_conf.vmlinux_name)
787 vmlinux_name = symbol_conf.vmlinux_name;
789 kernel = machine__findnew_kernel(machine, vmlinux_name,
790 "[kernel]", DSO_TYPE_KERNEL);
792 if (symbol_conf.default_guest_vmlinux_name)
793 vmlinux_name = symbol_conf.default_guest_vmlinux_name;
795 kernel = machine__findnew_kernel(machine, vmlinux_name,
797 DSO_TYPE_GUEST_KERNEL);
800 if (kernel != NULL && (!kernel->has_build_id))
801 dso__read_running_kernel_build_id(kernel, machine);
806 struct process_args {
810 void machine__get_kallsyms_filename(struct machine *machine, char *buf,
813 if (machine__is_default_guest(machine))
814 scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms);
816 scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir);
819 const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL};
821 /* Figure out the start address of kernel map from /proc/kallsyms.
822 * Returns the name of the start symbol in *symbol_name. Pass in NULL as
823 * symbol_name if it's not that important.
825 static int machine__get_running_kernel_start(struct machine *machine,
826 const char **symbol_name, u64 *start)
828 char filename[PATH_MAX];
833 machine__get_kallsyms_filename(machine, filename, PATH_MAX);
835 if (symbol__restricted_filename(filename, "/proc/kallsyms"))
838 for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) {
839 err = kallsyms__get_function_start(filename, name, &addr);
854 int machine__create_extra_kernel_map(struct machine *machine,
856 struct extra_kernel_map *xm)
861 map = map__new2(xm->start, kernel);
866 map->pgoff = xm->pgoff;
868 kmap = map__kmap(map);
870 kmap->kmaps = &machine->kmaps;
871 strlcpy(kmap->name, xm->name, KMAP_NAME_LEN);
873 map_groups__insert(&machine->kmaps, map);
875 pr_debug2("Added extra kernel map %s %" PRIx64 "-%" PRIx64 "\n",
876 kmap->name, map->start, map->end);
883 static u64 find_entry_trampoline(struct dso *dso)
885 /* Duplicates are removed so lookup all aliases */
886 const char *syms[] = {
888 "__entry_trampoline_start",
889 "entry_SYSCALL_64_trampoline",
891 struct symbol *sym = dso__first_symbol(dso);
894 for (; sym; sym = dso__next_symbol(sym)) {
895 if (sym->binding != STB_GLOBAL)
897 for (i = 0; i < ARRAY_SIZE(syms); i++) {
898 if (!strcmp(sym->name, syms[i]))
907 * These values can be used for kernels that do not have symbols for the entry
908 * trampolines in kallsyms.
910 #define X86_64_CPU_ENTRY_AREA_PER_CPU 0xfffffe0000000000ULL
911 #define X86_64_CPU_ENTRY_AREA_SIZE 0x2c000
912 #define X86_64_ENTRY_TRAMPOLINE 0x6000
914 /* Map x86_64 PTI entry trampolines */
915 int machine__map_x86_64_entry_trampolines(struct machine *machine,
918 struct map_groups *kmaps = &machine->kmaps;
919 struct maps *maps = &kmaps->maps;
920 int nr_cpus_avail, cpu;
926 * In the vmlinux case, pgoff is a virtual address which must now be
927 * mapped to a vmlinux offset.
929 for (map = maps__first(maps); map; map = map__next(map)) {
930 struct kmap *kmap = __map__kmap(map);
931 struct map *dest_map;
933 if (!kmap || !is_entry_trampoline(kmap->name))
936 dest_map = map_groups__find(kmaps, map->pgoff);
938 map->pgoff = dest_map->map_ip(dest_map, map->pgoff);
941 if (found || machine->trampolines_mapped)
944 pgoff = find_entry_trampoline(kernel);
948 nr_cpus_avail = machine__nr_cpus_avail(machine);
950 /* Add a 1 page map for each CPU's entry trampoline */
951 for (cpu = 0; cpu < nr_cpus_avail; cpu++) {
952 u64 va = X86_64_CPU_ENTRY_AREA_PER_CPU +
953 cpu * X86_64_CPU_ENTRY_AREA_SIZE +
954 X86_64_ENTRY_TRAMPOLINE;
955 struct extra_kernel_map xm = {
957 .end = va + page_size,
961 strlcpy(xm.name, ENTRY_TRAMPOLINE_NAME, KMAP_NAME_LEN);
963 if (machine__create_extra_kernel_map(machine, kernel, &xm) < 0)
967 machine->trampolines_mapped = nr_cpus_avail;
972 int __weak machine__create_extra_kernel_maps(struct machine *machine __maybe_unused,
973 struct dso *kernel __maybe_unused)
979 __machine__create_kernel_maps(struct machine *machine, struct dso *kernel)
984 /* In case of renewal the kernel map, destroy previous one */
985 machine__destroy_kernel_maps(machine);
987 machine->vmlinux_map = map__new2(0, kernel);
988 if (machine->vmlinux_map == NULL)
991 machine->vmlinux_map->map_ip = machine->vmlinux_map->unmap_ip = identity__map_ip;
992 map = machine__kernel_map(machine);
993 kmap = map__kmap(map);
997 kmap->kmaps = &machine->kmaps;
998 map_groups__insert(&machine->kmaps, map);
1003 void machine__destroy_kernel_maps(struct machine *machine)
1006 struct map *map = machine__kernel_map(machine);
1011 kmap = map__kmap(map);
1012 map_groups__remove(&machine->kmaps, map);
1013 if (kmap && kmap->ref_reloc_sym) {
1014 zfree((char **)&kmap->ref_reloc_sym->name);
1015 zfree(&kmap->ref_reloc_sym);
1018 map__zput(machine->vmlinux_map);
1021 int machines__create_guest_kernel_maps(struct machines *machines)
1024 struct dirent **namelist = NULL;
1026 char path[PATH_MAX];
1030 if (symbol_conf.default_guest_vmlinux_name ||
1031 symbol_conf.default_guest_modules ||
1032 symbol_conf.default_guest_kallsyms) {
1033 machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID);
1036 if (symbol_conf.guestmount) {
1037 items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL);
1040 for (i = 0; i < items; i++) {
1041 if (!isdigit(namelist[i]->d_name[0])) {
1042 /* Filter out . and .. */
1045 pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10);
1046 if ((*endp != '\0') ||
1047 (endp == namelist[i]->d_name) ||
1048 (errno == ERANGE)) {
1049 pr_debug("invalid directory (%s). Skipping.\n",
1050 namelist[i]->d_name);
1053 sprintf(path, "%s/%s/proc/kallsyms",
1054 symbol_conf.guestmount,
1055 namelist[i]->d_name);
1056 ret = access(path, R_OK);
1058 pr_debug("Can't access file %s\n", path);
1061 machines__create_kernel_maps(machines, pid);
1070 void machines__destroy_kernel_maps(struct machines *machines)
1072 struct rb_node *next = rb_first(&machines->guests);
1074 machine__destroy_kernel_maps(&machines->host);
1077 struct machine *pos = rb_entry(next, struct machine, rb_node);
1079 next = rb_next(&pos->rb_node);
1080 rb_erase(&pos->rb_node, &machines->guests);
1081 machine__delete(pos);
1085 int machines__create_kernel_maps(struct machines *machines, pid_t pid)
1087 struct machine *machine = machines__findnew(machines, pid);
1089 if (machine == NULL)
1092 return machine__create_kernel_maps(machine);
1095 int machine__load_kallsyms(struct machine *machine, const char *filename)
1097 struct map *map = machine__kernel_map(machine);
1098 int ret = __dso__load_kallsyms(map->dso, filename, map, true);
1101 dso__set_loaded(map->dso);
1103 * Since /proc/kallsyms will have multiple sessions for the
1104 * kernel, with modules between them, fixup the end of all
1107 map_groups__fixup_end(&machine->kmaps);
1113 int machine__load_vmlinux_path(struct machine *machine)
1115 struct map *map = machine__kernel_map(machine);
1116 int ret = dso__load_vmlinux_path(map->dso, map);
1119 dso__set_loaded(map->dso);
1124 static char *get_kernel_version(const char *root_dir)
1126 char version[PATH_MAX];
1129 const char *prefix = "Linux version ";
1131 sprintf(version, "%s/proc/version", root_dir);
1132 file = fopen(version, "r");
1137 tmp = fgets(version, sizeof(version), file);
1140 name = strstr(version, prefix);
1143 name += strlen(prefix);
1144 tmp = strchr(name, ' ');
1148 return strdup(name);
1151 static bool is_kmod_dso(struct dso *dso)
1153 return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE ||
1154 dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE;
1157 static int map_groups__set_module_path(struct map_groups *mg, const char *path,
1158 struct kmod_path *m)
1161 struct map *map = map_groups__find_by_name(mg, m->name);
1166 long_name = strdup(path);
1167 if (long_name == NULL)
1170 dso__set_long_name(map->dso, long_name, true);
1171 dso__kernel_module_get_build_id(map->dso, "");
1174 * Full name could reveal us kmod compression, so
1175 * we need to update the symtab_type if needed.
1177 if (m->comp && is_kmod_dso(map->dso))
1178 map->dso->symtab_type++;
1183 static int map_groups__set_modules_path_dir(struct map_groups *mg,
1184 const char *dir_name, int depth)
1186 struct dirent *dent;
1187 DIR *dir = opendir(dir_name);
1191 pr_debug("%s: cannot open %s dir\n", __func__, dir_name);
1195 while ((dent = readdir(dir)) != NULL) {
1196 char path[PATH_MAX];
1199 /*sshfs might return bad dent->d_type, so we have to stat*/
1200 snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name);
1201 if (stat(path, &st))
1204 if (S_ISDIR(st.st_mode)) {
1205 if (!strcmp(dent->d_name, ".") ||
1206 !strcmp(dent->d_name, ".."))
1209 /* Do not follow top-level source and build symlinks */
1211 if (!strcmp(dent->d_name, "source") ||
1212 !strcmp(dent->d_name, "build"))
1216 ret = map_groups__set_modules_path_dir(mg, path,
1223 ret = kmod_path__parse_name(&m, dent->d_name);
1228 ret = map_groups__set_module_path(mg, path, &m);
1242 static int machine__set_modules_path(struct machine *machine)
1245 char modules_path[PATH_MAX];
1247 version = get_kernel_version(machine->root_dir);
1251 snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s",
1252 machine->root_dir, version);
1255 return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0);
1257 int __weak arch__fix_module_text_start(u64 *start __maybe_unused,
1258 const char *name __maybe_unused)
1263 static int machine__create_module(void *arg, const char *name, u64 start,
1266 struct machine *machine = arg;
1269 if (arch__fix_module_text_start(&start, name) < 0)
1272 map = machine__findnew_module_map(machine, start, name);
1275 map->end = start + size;
1277 dso__kernel_module_get_build_id(map->dso, machine->root_dir);
1282 static int machine__create_modules(struct machine *machine)
1284 const char *modules;
1285 char path[PATH_MAX];
1287 if (machine__is_default_guest(machine)) {
1288 modules = symbol_conf.default_guest_modules;
1290 snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir);
1294 if (symbol__restricted_filename(modules, "/proc/modules"))
1297 if (modules__parse(modules, machine, machine__create_module))
1300 if (!machine__set_modules_path(machine))
1303 pr_debug("Problems setting modules path maps, continuing anyway...\n");
1308 static void machine__set_kernel_mmap(struct machine *machine,
1311 machine->vmlinux_map->start = start;
1312 machine->vmlinux_map->end = end;
1314 * Be a bit paranoid here, some perf.data file came with
1315 * a zero sized synthesized MMAP event for the kernel.
1317 if (start == 0 && end == 0)
1318 machine->vmlinux_map->end = ~0ULL;
1321 int machine__create_kernel_maps(struct machine *machine)
1323 struct dso *kernel = machine__get_kernel(machine);
1324 const char *name = NULL;
1332 ret = __machine__create_kernel_maps(machine, kernel);
1336 if (symbol_conf.use_modules && machine__create_modules(machine) < 0) {
1337 if (machine__is_host(machine))
1338 pr_debug("Problems creating module maps, "
1339 "continuing anyway...\n");
1341 pr_debug("Problems creating module maps for guest %d, "
1342 "continuing anyway...\n", machine->pid);
1345 if (!machine__get_running_kernel_start(machine, &name, &addr)) {
1347 map__set_kallsyms_ref_reloc_sym(machine->vmlinux_map, name, addr)) {
1348 machine__destroy_kernel_maps(machine);
1353 /* we have a real start address now, so re-order the kmaps */
1354 map = machine__kernel_map(machine);
1357 map_groups__remove(&machine->kmaps, map);
1359 /* assume it's the last in the kmaps */
1360 machine__set_kernel_mmap(machine, addr, ~0ULL);
1362 map_groups__insert(&machine->kmaps, map);
1366 if (machine__create_extra_kernel_maps(machine, kernel))
1367 pr_debug("Problems creating extra kernel maps, continuing anyway...\n");
1369 /* update end address of the kernel map using adjacent module address */
1370 map = map__next(machine__kernel_map(machine));
1372 machine__set_kernel_mmap(machine, addr, map->start);
1378 static bool machine__uses_kcore(struct machine *machine)
1382 list_for_each_entry(dso, &machine->dsos.head, node) {
1383 if (dso__is_kcore(dso))
1390 static bool perf_event__is_extra_kernel_mmap(struct machine *machine,
1391 union perf_event *event)
1393 return machine__is(machine, "x86_64") &&
1394 is_entry_trampoline(event->mmap.filename);
1397 static int machine__process_extra_kernel_map(struct machine *machine,
1398 union perf_event *event)
1400 struct map *kernel_map = machine__kernel_map(machine);
1401 struct dso *kernel = kernel_map ? kernel_map->dso : NULL;
1402 struct extra_kernel_map xm = {
1403 .start = event->mmap.start,
1404 .end = event->mmap.start + event->mmap.len,
1405 .pgoff = event->mmap.pgoff,
1411 strlcpy(xm.name, event->mmap.filename, KMAP_NAME_LEN);
1413 return machine__create_extra_kernel_map(machine, kernel, &xm);
1416 static int machine__process_kernel_mmap_event(struct machine *machine,
1417 union perf_event *event)
1420 enum dso_kernel_type kernel_type;
1421 bool is_kernel_mmap;
1423 /* If we have maps from kcore then we do not need or want any others */
1424 if (machine__uses_kcore(machine))
1427 if (machine__is_host(machine))
1428 kernel_type = DSO_TYPE_KERNEL;
1430 kernel_type = DSO_TYPE_GUEST_KERNEL;
1432 is_kernel_mmap = memcmp(event->mmap.filename,
1434 strlen(machine->mmap_name) - 1) == 0;
1435 if (event->mmap.filename[0] == '/' ||
1436 (!is_kernel_mmap && event->mmap.filename[0] == '[')) {
1437 map = machine__findnew_module_map(machine, event->mmap.start,
1438 event->mmap.filename);
1442 map->end = map->start + event->mmap.len;
1443 } else if (is_kernel_mmap) {
1444 const char *symbol_name = (event->mmap.filename +
1445 strlen(machine->mmap_name));
1447 * Should be there already, from the build-id table in
1450 struct dso *kernel = NULL;
1453 down_read(&machine->dsos.lock);
1455 list_for_each_entry(dso, &machine->dsos.head, node) {
1458 * The cpumode passed to is_kernel_module is not the
1459 * cpumode of *this* event. If we insist on passing
1460 * correct cpumode to is_kernel_module, we should
1461 * record the cpumode when we adding this dso to the
1464 * However we don't really need passing correct
1465 * cpumode. We know the correct cpumode must be kernel
1466 * mode (if not, we should not link it onto kernel_dsos
1469 * Therefore, we pass PERF_RECORD_MISC_CPUMODE_UNKNOWN.
1470 * is_kernel_module() treats it as a kernel cpumode.
1474 is_kernel_module(dso->long_name,
1475 PERF_RECORD_MISC_CPUMODE_UNKNOWN))
1483 up_read(&machine->dsos.lock);
1486 kernel = machine__findnew_dso(machine, machine->mmap_name);
1490 kernel->kernel = kernel_type;
1491 if (__machine__create_kernel_maps(machine, kernel) < 0) {
1496 if (strstr(kernel->long_name, "vmlinux"))
1497 dso__set_short_name(kernel, "[kernel.vmlinux]", false);
1499 machine__set_kernel_mmap(machine, event->mmap.start,
1500 event->mmap.start + event->mmap.len);
1503 * Avoid using a zero address (kptr_restrict) for the ref reloc
1504 * symbol. Effectively having zero here means that at record
1505 * time /proc/sys/kernel/kptr_restrict was non zero.
1507 if (event->mmap.pgoff != 0) {
1508 map__set_kallsyms_ref_reloc_sym(machine->vmlinux_map,
1513 if (machine__is_default_guest(machine)) {
1515 * preload dso of guest kernel and modules
1517 dso__load(kernel, machine__kernel_map(machine));
1519 } else if (perf_event__is_extra_kernel_mmap(machine, event)) {
1520 return machine__process_extra_kernel_map(machine, event);
1527 int machine__process_mmap2_event(struct machine *machine,
1528 union perf_event *event,
1529 struct perf_sample *sample)
1531 struct thread *thread;
1536 perf_event__fprintf_mmap2(event, stdout);
1538 if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
1539 sample->cpumode == PERF_RECORD_MISC_KERNEL) {
1540 ret = machine__process_kernel_mmap_event(machine, event);
1546 thread = machine__findnew_thread(machine, event->mmap2.pid,
1551 map = map__new(machine, event->mmap2.start,
1552 event->mmap2.len, event->mmap2.pgoff,
1554 event->mmap2.min, event->mmap2.ino,
1555 event->mmap2.ino_generation,
1558 event->mmap2.filename, thread);
1561 goto out_problem_map;
1563 ret = thread__insert_map(thread, map);
1565 goto out_problem_insert;
1567 thread__put(thread);
1574 thread__put(thread);
1576 dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n");
1580 int machine__process_mmap_event(struct machine *machine, union perf_event *event,
1581 struct perf_sample *sample)
1583 struct thread *thread;
1589 perf_event__fprintf_mmap(event, stdout);
1591 if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
1592 sample->cpumode == PERF_RECORD_MISC_KERNEL) {
1593 ret = machine__process_kernel_mmap_event(machine, event);
1599 thread = machine__findnew_thread(machine, event->mmap.pid,
1604 if (!(event->header.misc & PERF_RECORD_MISC_MMAP_DATA))
1607 map = map__new(machine, event->mmap.start,
1608 event->mmap.len, event->mmap.pgoff,
1609 0, 0, 0, 0, prot, 0,
1610 event->mmap.filename,
1614 goto out_problem_map;
1616 ret = thread__insert_map(thread, map);
1618 goto out_problem_insert;
1620 thread__put(thread);
1627 thread__put(thread);
1629 dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
1633 static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock)
1635 struct threads *threads = machine__threads(machine, th->tid);
1637 if (threads->last_match == th)
1638 threads->last_match = NULL;
1640 BUG_ON(refcount_read(&th->refcnt) == 0);
1642 down_write(&threads->lock);
1643 rb_erase_init(&th->rb_node, &threads->entries);
1644 RB_CLEAR_NODE(&th->rb_node);
1647 * Move it first to the dead_threads list, then drop the reference,
1648 * if this is the last reference, then the thread__delete destructor
1649 * will be called and we will remove it from the dead_threads list.
1651 list_add_tail(&th->node, &threads->dead);
1653 up_write(&threads->lock);
1657 void machine__remove_thread(struct machine *machine, struct thread *th)
1659 return __machine__remove_thread(machine, th, true);
1662 int machine__process_fork_event(struct machine *machine, union perf_event *event,
1663 struct perf_sample *sample)
1665 struct thread *thread = machine__find_thread(machine,
1668 struct thread *parent = machine__findnew_thread(machine,
1674 perf_event__fprintf_task(event, stdout);
1677 * There may be an existing thread that is not actually the parent,
1678 * either because we are processing events out of order, or because the
1679 * (fork) event that would have removed the thread was lost. Assume the
1680 * latter case and continue on as best we can.
1682 if (parent->pid_ != (pid_t)event->fork.ppid) {
1683 dump_printf("removing erroneous parent thread %d/%d\n",
1684 parent->pid_, parent->tid);
1685 machine__remove_thread(machine, parent);
1686 thread__put(parent);
1687 parent = machine__findnew_thread(machine, event->fork.ppid,
1691 /* if a thread currently exists for the thread id remove it */
1692 if (thread != NULL) {
1693 machine__remove_thread(machine, thread);
1694 thread__put(thread);
1697 thread = machine__findnew_thread(machine, event->fork.pid,
1700 if (thread == NULL || parent == NULL ||
1701 thread__fork(thread, parent, sample->time) < 0) {
1702 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
1705 thread__put(thread);
1706 thread__put(parent);
1711 int machine__process_exit_event(struct machine *machine, union perf_event *event,
1712 struct perf_sample *sample __maybe_unused)
1714 struct thread *thread = machine__find_thread(machine,
1719 perf_event__fprintf_task(event, stdout);
1721 if (thread != NULL) {
1722 thread__exited(thread);
1723 thread__put(thread);
1729 int machine__process_event(struct machine *machine, union perf_event *event,
1730 struct perf_sample *sample)
1734 switch (event->header.type) {
1735 case PERF_RECORD_COMM:
1736 ret = machine__process_comm_event(machine, event, sample); break;
1737 case PERF_RECORD_MMAP:
1738 ret = machine__process_mmap_event(machine, event, sample); break;
1739 case PERF_RECORD_NAMESPACES:
1740 ret = machine__process_namespaces_event(machine, event, sample); break;
1741 case PERF_RECORD_MMAP2:
1742 ret = machine__process_mmap2_event(machine, event, sample); break;
1743 case PERF_RECORD_FORK:
1744 ret = machine__process_fork_event(machine, event, sample); break;
1745 case PERF_RECORD_EXIT:
1746 ret = machine__process_exit_event(machine, event, sample); break;
1747 case PERF_RECORD_LOST:
1748 ret = machine__process_lost_event(machine, event, sample); break;
1749 case PERF_RECORD_AUX:
1750 ret = machine__process_aux_event(machine, event); break;
1751 case PERF_RECORD_ITRACE_START:
1752 ret = machine__process_itrace_start_event(machine, event); break;
1753 case PERF_RECORD_LOST_SAMPLES:
1754 ret = machine__process_lost_samples_event(machine, event, sample); break;
1755 case PERF_RECORD_SWITCH:
1756 case PERF_RECORD_SWITCH_CPU_WIDE:
1757 ret = machine__process_switch_event(machine, event); break;
1766 static bool symbol__match_regex(struct symbol *sym, regex_t *regex)
1768 if (!regexec(regex, sym->name, 0, NULL, 0))
1773 static void ip__resolve_ams(struct thread *thread,
1774 struct addr_map_symbol *ams,
1777 struct addr_location al;
1779 memset(&al, 0, sizeof(al));
1781 * We cannot use the header.misc hint to determine whether a
1782 * branch stack address is user, kernel, guest, hypervisor.
1783 * Branches may straddle the kernel/user/hypervisor boundaries.
1784 * Thus, we have to try consecutively until we find a match
1785 * or else, the symbol is unknown
1787 thread__find_cpumode_addr_location(thread, ip, &al);
1790 ams->al_addr = al.addr;
1796 static void ip__resolve_data(struct thread *thread,
1797 u8 m, struct addr_map_symbol *ams,
1798 u64 addr, u64 phys_addr)
1800 struct addr_location al;
1802 memset(&al, 0, sizeof(al));
1804 thread__find_symbol(thread, m, addr, &al);
1807 ams->al_addr = al.addr;
1810 ams->phys_addr = phys_addr;
1813 struct mem_info *sample__resolve_mem(struct perf_sample *sample,
1814 struct addr_location *al)
1816 struct mem_info *mi = mem_info__new();
1821 ip__resolve_ams(al->thread, &mi->iaddr, sample->ip);
1822 ip__resolve_data(al->thread, al->cpumode, &mi->daddr,
1823 sample->addr, sample->phys_addr);
1824 mi->data_src.val = sample->data_src;
1829 static char *callchain_srcline(struct map *map, struct symbol *sym, u64 ip)
1831 char *srcline = NULL;
1833 if (!map || callchain_param.key == CCKEY_FUNCTION)
1836 srcline = srcline__tree_find(&map->dso->srclines, ip);
1838 bool show_sym = false;
1839 bool show_addr = callchain_param.key == CCKEY_ADDRESS;
1841 srcline = get_srcline(map->dso, map__rip_2objdump(map, ip),
1842 sym, show_sym, show_addr, ip);
1843 srcline__tree_insert(&map->dso->srclines, ip, srcline);
1854 static int add_callchain_ip(struct thread *thread,
1855 struct callchain_cursor *cursor,
1856 struct symbol **parent,
1857 struct addr_location *root_al,
1861 struct branch_flags *flags,
1862 struct iterations *iter,
1865 struct addr_location al;
1866 int nr_loop_iter = 0;
1867 u64 iter_cycles = 0;
1868 const char *srcline = NULL;
1873 thread__find_cpumode_addr_location(thread, ip, &al);
1875 if (ip >= PERF_CONTEXT_MAX) {
1877 case PERF_CONTEXT_HV:
1878 *cpumode = PERF_RECORD_MISC_HYPERVISOR;
1880 case PERF_CONTEXT_KERNEL:
1881 *cpumode = PERF_RECORD_MISC_KERNEL;
1883 case PERF_CONTEXT_USER:
1884 *cpumode = PERF_RECORD_MISC_USER;
1887 pr_debug("invalid callchain context: "
1888 "%"PRId64"\n", (s64) ip);
1890 * It seems the callchain is corrupted.
1893 callchain_cursor_reset(cursor);
1898 thread__find_symbol(thread, *cpumode, ip, &al);
1901 if (al.sym != NULL) {
1902 if (perf_hpp_list.parent && !*parent &&
1903 symbol__match_regex(al.sym, &parent_regex))
1905 else if (have_ignore_callees && root_al &&
1906 symbol__match_regex(al.sym, &ignore_callees_regex)) {
1907 /* Treat this symbol as the root,
1908 forgetting its callees. */
1910 callchain_cursor_reset(cursor);
1914 if (symbol_conf.hide_unresolved && al.sym == NULL)
1918 nr_loop_iter = iter->nr_loop_iter;
1919 iter_cycles = iter->cycles;
1922 srcline = callchain_srcline(al.map, al.sym, al.addr);
1923 return callchain_cursor_append(cursor, ip, al.map, al.sym,
1924 branch, flags, nr_loop_iter,
1925 iter_cycles, branch_from, srcline);
1928 struct branch_info *sample__resolve_bstack(struct perf_sample *sample,
1929 struct addr_location *al)
1932 const struct branch_stack *bs = sample->branch_stack;
1933 struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info));
1938 for (i = 0; i < bs->nr; i++) {
1939 ip__resolve_ams(al->thread, &bi[i].to, bs->entries[i].to);
1940 ip__resolve_ams(al->thread, &bi[i].from, bs->entries[i].from);
1941 bi[i].flags = bs->entries[i].flags;
1946 static void save_iterations(struct iterations *iter,
1947 struct branch_entry *be, int nr)
1951 iter->nr_loop_iter = nr;
1954 for (i = 0; i < nr; i++)
1955 iter->cycles += be[i].flags.cycles;
1960 #define NO_ENTRY 0xff
1962 #define PERF_MAX_BRANCH_DEPTH 127
1965 static int remove_loops(struct branch_entry *l, int nr,
1966 struct iterations *iter)
1969 unsigned char chash[CHASHSZ];
1971 memset(chash, NO_ENTRY, sizeof(chash));
1973 BUG_ON(PERF_MAX_BRANCH_DEPTH > 255);
1975 for (i = 0; i < nr; i++) {
1976 int h = hash_64(l[i].from, CHASHBITS) % CHASHSZ;
1978 /* no collision handling for now */
1979 if (chash[h] == NO_ENTRY) {
1981 } else if (l[chash[h]].from == l[i].from) {
1982 bool is_loop = true;
1983 /* check if it is a real loop */
1985 for (j = chash[h]; j < i && i + off < nr; j++, off++)
1986 if (l[j].from != l[i + off].from) {
1993 save_iterations(iter + i + off,
1996 memmove(iter + i, iter + i + off,
1999 memmove(l + i, l + i + off,
2011 * Recolve LBR callstack chain sample
2013 * 1 on success get LBR callchain information
2014 * 0 no available LBR callchain information, should try fp
2015 * negative error code on other errors.
2017 static int resolve_lbr_callchain_sample(struct thread *thread,
2018 struct callchain_cursor *cursor,
2019 struct perf_sample *sample,
2020 struct symbol **parent,
2021 struct addr_location *root_al,
2024 struct ip_callchain *chain = sample->callchain;
2025 int chain_nr = min(max_stack, (int)chain->nr), i;
2026 u8 cpumode = PERF_RECORD_MISC_USER;
2027 u64 ip, branch_from = 0;
2029 for (i = 0; i < chain_nr; i++) {
2030 if (chain->ips[i] == PERF_CONTEXT_USER)
2034 /* LBR only affects the user callchain */
2035 if (i != chain_nr) {
2036 struct branch_stack *lbr_stack = sample->branch_stack;
2037 int lbr_nr = lbr_stack->nr, j, k;
2039 struct branch_flags *flags;
2041 * LBR callstack can only get user call chain.
2042 * The mix_chain_nr is kernel call chain
2043 * number plus LBR user call chain number.
2044 * i is kernel call chain number,
2045 * 1 is PERF_CONTEXT_USER,
2046 * lbr_nr + 1 is the user call chain number.
2047 * For details, please refer to the comments
2048 * in callchain__printf
2050 int mix_chain_nr = i + 1 + lbr_nr + 1;
2052 for (j = 0; j < mix_chain_nr; j++) {
2057 if (callchain_param.order == ORDER_CALLEE) {
2060 else if (j > i + 1) {
2062 ip = lbr_stack->entries[k].from;
2064 flags = &lbr_stack->entries[k].flags;
2066 ip = lbr_stack->entries[0].to;
2068 flags = &lbr_stack->entries[0].flags;
2070 lbr_stack->entries[0].from;
2075 ip = lbr_stack->entries[k].from;
2077 flags = &lbr_stack->entries[k].flags;
2079 else if (j > lbr_nr)
2080 ip = chain->ips[i + 1 - (j - lbr_nr)];
2082 ip = lbr_stack->entries[0].to;
2084 flags = &lbr_stack->entries[0].flags;
2086 lbr_stack->entries[0].from;
2090 err = add_callchain_ip(thread, cursor, parent,
2091 root_al, &cpumode, ip,
2092 branch, flags, NULL,
2095 return (err < 0) ? err : 0;
2103 static int thread__resolve_callchain_sample(struct thread *thread,
2104 struct callchain_cursor *cursor,
2105 struct perf_evsel *evsel,
2106 struct perf_sample *sample,
2107 struct symbol **parent,
2108 struct addr_location *root_al,
2111 struct branch_stack *branch = sample->branch_stack;
2112 struct ip_callchain *chain = sample->callchain;
2114 u8 cpumode = PERF_RECORD_MISC_USER;
2115 int i, j, err, nr_entries;
2120 chain_nr = chain->nr;
2122 if (perf_evsel__has_branch_callstack(evsel)) {
2123 err = resolve_lbr_callchain_sample(thread, cursor, sample, parent,
2124 root_al, max_stack);
2126 return (err < 0) ? err : 0;
2130 * Based on DWARF debug information, some architectures skip
2131 * a callchain entry saved by the kernel.
2133 skip_idx = arch_skip_callchain_idx(thread, chain);
2136 * Add branches to call stack for easier browsing. This gives
2137 * more context for a sample than just the callers.
2139 * This uses individual histograms of paths compared to the
2140 * aggregated histograms the normal LBR mode uses.
2142 * Limitations for now:
2143 * - No extra filters
2144 * - No annotations (should annotate somehow)
2147 if (branch && callchain_param.branch_callstack) {
2148 int nr = min(max_stack, (int)branch->nr);
2149 struct branch_entry be[nr];
2150 struct iterations iter[nr];
2152 if (branch->nr > PERF_MAX_BRANCH_DEPTH) {
2153 pr_warning("corrupted branch chain. skipping...\n");
2157 for (i = 0; i < nr; i++) {
2158 if (callchain_param.order == ORDER_CALLEE) {
2159 be[i] = branch->entries[i];
2165 * Check for overlap into the callchain.
2166 * The return address is one off compared to
2167 * the branch entry. To adjust for this
2168 * assume the calling instruction is not longer
2171 if (i == skip_idx ||
2172 chain->ips[first_call] >= PERF_CONTEXT_MAX)
2174 else if (be[i].from < chain->ips[first_call] &&
2175 be[i].from >= chain->ips[first_call] - 8)
2178 be[i] = branch->entries[branch->nr - i - 1];
2181 memset(iter, 0, sizeof(struct iterations) * nr);
2182 nr = remove_loops(be, nr, iter);
2184 for (i = 0; i < nr; i++) {
2185 err = add_callchain_ip(thread, cursor, parent,
2192 err = add_callchain_ip(thread, cursor, parent, root_al,
2209 for (i = first_call, nr_entries = 0;
2210 i < chain_nr && nr_entries < max_stack; i++) {
2213 if (callchain_param.order == ORDER_CALLEE)
2216 j = chain->nr - i - 1;
2218 #ifdef HAVE_SKIP_CALLCHAIN_IDX
2224 if (ip < PERF_CONTEXT_MAX)
2227 err = add_callchain_ip(thread, cursor, parent,
2228 root_al, &cpumode, ip,
2229 false, NULL, NULL, 0);
2232 return (err < 0) ? err : 0;
2238 static int append_inlines(struct callchain_cursor *cursor,
2239 struct map *map, struct symbol *sym, u64 ip)
2241 struct inline_node *inline_node;
2242 struct inline_list *ilist;
2246 if (!symbol_conf.inline_name || !map || !sym)
2249 addr = map__rip_2objdump(map, ip);
2251 inline_node = inlines__tree_find(&map->dso->inlined_nodes, addr);
2253 inline_node = dso__parse_addr_inlines(map->dso, addr, sym);
2256 inlines__tree_insert(&map->dso->inlined_nodes, inline_node);
2259 list_for_each_entry(ilist, &inline_node->val, list) {
2260 ret = callchain_cursor_append(cursor, ip, map,
2261 ilist->symbol, false,
2262 NULL, 0, 0, 0, ilist->srcline);
2271 static int unwind_entry(struct unwind_entry *entry, void *arg)
2273 struct callchain_cursor *cursor = arg;
2274 const char *srcline = NULL;
2276 if (symbol_conf.hide_unresolved && entry->sym == NULL)
2279 if (append_inlines(cursor, entry->map, entry->sym, entry->ip) == 0)
2282 srcline = callchain_srcline(entry->map, entry->sym, entry->ip);
2283 return callchain_cursor_append(cursor, entry->ip,
2284 entry->map, entry->sym,
2285 false, NULL, 0, 0, 0, srcline);
2288 static int thread__resolve_callchain_unwind(struct thread *thread,
2289 struct callchain_cursor *cursor,
2290 struct perf_evsel *evsel,
2291 struct perf_sample *sample,
2294 /* Can we do dwarf post unwind? */
2295 if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) &&
2296 (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER)))
2299 /* Bail out if nothing was captured. */
2300 if ((!sample->user_regs.regs) ||
2301 (!sample->user_stack.size))
2304 return unwind__get_entries(unwind_entry, cursor,
2305 thread, sample, max_stack);
2308 int thread__resolve_callchain(struct thread *thread,
2309 struct callchain_cursor *cursor,
2310 struct perf_evsel *evsel,
2311 struct perf_sample *sample,
2312 struct symbol **parent,
2313 struct addr_location *root_al,
2318 callchain_cursor_reset(cursor);
2320 if (callchain_param.order == ORDER_CALLEE) {
2321 ret = thread__resolve_callchain_sample(thread, cursor,
2327 ret = thread__resolve_callchain_unwind(thread, cursor,
2331 ret = thread__resolve_callchain_unwind(thread, cursor,
2336 ret = thread__resolve_callchain_sample(thread, cursor,
2345 int machine__for_each_thread(struct machine *machine,
2346 int (*fn)(struct thread *thread, void *p),
2349 struct threads *threads;
2351 struct thread *thread;
2355 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
2356 threads = &machine->threads[i];
2357 for (nd = rb_first(&threads->entries); nd; nd = rb_next(nd)) {
2358 thread = rb_entry(nd, struct thread, rb_node);
2359 rc = fn(thread, priv);
2364 list_for_each_entry(thread, &threads->dead, node) {
2365 rc = fn(thread, priv);
2373 int machines__for_each_thread(struct machines *machines,
2374 int (*fn)(struct thread *thread, void *p),
2380 rc = machine__for_each_thread(&machines->host, fn, priv);
2384 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
2385 struct machine *machine = rb_entry(nd, struct machine, rb_node);
2387 rc = machine__for_each_thread(machine, fn, priv);
2394 int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
2395 struct target *target, struct thread_map *threads,
2396 perf_event__handler_t process, bool data_mmap,
2397 unsigned int proc_map_timeout,
2398 unsigned int nr_threads_synthesize)
2400 if (target__has_task(target))
2401 return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap, proc_map_timeout);
2402 else if (target__has_cpu(target))
2403 return perf_event__synthesize_threads(tool, process,
2406 nr_threads_synthesize);
2407 /* command specified */
2411 pid_t machine__get_current_tid(struct machine *machine, int cpu)
2413 if (cpu < 0 || cpu >= MAX_NR_CPUS || !machine->current_tid)
2416 return machine->current_tid[cpu];
2419 int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid,
2422 struct thread *thread;
2427 if (!machine->current_tid) {
2430 machine->current_tid = calloc(MAX_NR_CPUS, sizeof(pid_t));
2431 if (!machine->current_tid)
2433 for (i = 0; i < MAX_NR_CPUS; i++)
2434 machine->current_tid[i] = -1;
2437 if (cpu >= MAX_NR_CPUS) {
2438 pr_err("Requested CPU %d too large. ", cpu);
2439 pr_err("Consider raising MAX_NR_CPUS\n");
2443 machine->current_tid[cpu] = tid;
2445 thread = machine__findnew_thread(machine, pid, tid);
2450 thread__put(thread);
2456 * Compares the raw arch string. N.B. see instead perf_env__arch() if a
2457 * normalized arch is needed.
2459 bool machine__is(struct machine *machine, const char *arch)
2461 return machine && !strcmp(perf_env__raw_arch(machine->env), arch);
2464 int machine__nr_cpus_avail(struct machine *machine)
2466 return machine ? perf_env__nr_cpus_avail(machine->env) : 0;
2469 int machine__get_kernel_start(struct machine *machine)
2471 struct map *map = machine__kernel_map(machine);
2475 * The only addresses above 2^63 are kernel addresses of a 64-bit
2476 * kernel. Note that addresses are unsigned so that on a 32-bit system
2477 * all addresses including kernel addresses are less than 2^32. In
2478 * that case (32-bit system), if the kernel mapping is unknown, all
2479 * addresses will be assumed to be in user space - see
2480 * machine__kernel_ip().
2482 machine->kernel_start = 1ULL << 63;
2484 err = map__load(map);
2486 * On x86_64, PTI entry trampolines are less than the
2487 * start of kernel text, but still above 2^63. So leave
2488 * kernel_start = 1ULL << 63 for x86_64.
2490 if (!err && !machine__is(machine, "x86_64"))
2491 machine->kernel_start = map->start;
2496 struct dso *machine__findnew_dso(struct machine *machine, const char *filename)
2498 return dsos__findnew(&machine->dsos, filename);
2501 char *machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
2503 struct machine *machine = vmachine;
2505 struct symbol *sym = machine__find_kernel_symbol(machine, *addrp, &map);
2510 *modp = __map__is_kmodule(map) ? (char *)map->dso->short_name : NULL;
2511 *addrp = map->unmap_ip(map, sym->start);