1 // SPDX-License-Identifier: GPL-2.0
16 #include "map_symbol.h"
18 #include "mem-events.h"
28 #include <sys/types.h>
32 #include "linux/hash.h"
34 #include "bpf-event.h"
35 #include <internal/lib.h> // page_size
38 #include <linux/ctype.h>
39 #include <symbol/kallsyms.h>
40 #include <linux/mman.h>
41 #include <linux/string.h>
42 #include <linux/zalloc.h>
44 static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock);
46 static struct dso *machine__kernel_dso(struct machine *machine)
48 return machine->vmlinux_map->dso;
51 static void dsos__init(struct dsos *dsos)
53 INIT_LIST_HEAD(&dsos->head);
55 init_rwsem(&dsos->lock);
58 static void machine__threads_init(struct machine *machine)
62 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
63 struct threads *threads = &machine->threads[i];
64 threads->entries = RB_ROOT_CACHED;
65 init_rwsem(&threads->lock);
67 INIT_LIST_HEAD(&threads->dead);
68 threads->last_match = NULL;
72 static int machine__set_mmap_name(struct machine *machine)
74 if (machine__is_host(machine))
75 machine->mmap_name = strdup("[kernel.kallsyms]");
76 else if (machine__is_default_guest(machine))
77 machine->mmap_name = strdup("[guest.kernel.kallsyms]");
78 else if (asprintf(&machine->mmap_name, "[guest.kernel.kallsyms.%d]",
80 machine->mmap_name = NULL;
82 return machine->mmap_name ? 0 : -ENOMEM;
85 int machine__init(struct machine *machine, const char *root_dir, pid_t pid)
89 memset(machine, 0, sizeof(*machine));
90 maps__init(&machine->kmaps, machine);
91 RB_CLEAR_NODE(&machine->rb_node);
92 dsos__init(&machine->dsos);
94 machine__threads_init(machine);
96 machine->vdso_info = NULL;
101 machine->id_hdr_size = 0;
102 machine->kptr_restrict_warned = false;
103 machine->comm_exec = false;
104 machine->kernel_start = 0;
105 machine->vmlinux_map = NULL;
107 machine->root_dir = strdup(root_dir);
108 if (machine->root_dir == NULL)
111 if (machine__set_mmap_name(machine))
114 if (pid != HOST_KERNEL_ID) {
115 struct thread *thread = machine__findnew_thread(machine, -1,
122 snprintf(comm, sizeof(comm), "[guest/%d]", pid);
123 thread__set_comm(thread, comm, 0);
127 machine->current_tid = NULL;
132 zfree(&machine->root_dir);
133 zfree(&machine->mmap_name);
138 struct machine *machine__new_host(void)
140 struct machine *machine = malloc(sizeof(*machine));
142 if (machine != NULL) {
143 machine__init(machine, "", HOST_KERNEL_ID);
145 if (machine__create_kernel_maps(machine) < 0)
155 struct machine *machine__new_kallsyms(void)
157 struct machine *machine = machine__new_host();
160 * 1) We should switch to machine__load_kallsyms(), i.e. not explicitly
161 * ask for not using the kcore parsing code, once this one is fixed
162 * to create a map per module.
164 if (machine && machine__load_kallsyms(machine, "/proc/kallsyms") <= 0) {
165 machine__delete(machine);
172 static void dsos__purge(struct dsos *dsos)
176 down_write(&dsos->lock);
178 list_for_each_entry_safe(pos, n, &dsos->head, node) {
179 RB_CLEAR_NODE(&pos->rb_node);
181 list_del_init(&pos->node);
185 up_write(&dsos->lock);
188 static void dsos__exit(struct dsos *dsos)
191 exit_rwsem(&dsos->lock);
194 void machine__delete_threads(struct machine *machine)
199 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
200 struct threads *threads = &machine->threads[i];
201 down_write(&threads->lock);
202 nd = rb_first_cached(&threads->entries);
204 struct thread *t = rb_entry(nd, struct thread, rb_node);
207 __machine__remove_thread(machine, t, false);
209 up_write(&threads->lock);
213 void machine__exit(struct machine *machine)
220 machine__destroy_kernel_maps(machine);
221 maps__exit(&machine->kmaps);
222 dsos__exit(&machine->dsos);
223 machine__exit_vdso(machine);
224 zfree(&machine->root_dir);
225 zfree(&machine->mmap_name);
226 zfree(&machine->current_tid);
228 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
229 struct threads *threads = &machine->threads[i];
230 struct thread *thread, *n;
232 * Forget about the dead, at this point whatever threads were
233 * left in the dead lists better have a reference count taken
234 * by who is using them, and then, when they drop those references
235 * and it finally hits zero, thread__put() will check and see that
236 * its not in the dead threads list and will not try to remove it
237 * from there, just calling thread__delete() straight away.
239 list_for_each_entry_safe(thread, n, &threads->dead, node)
240 list_del_init(&thread->node);
242 exit_rwsem(&threads->lock);
246 void machine__delete(struct machine *machine)
249 machine__exit(machine);
254 void machines__init(struct machines *machines)
256 machine__init(&machines->host, "", HOST_KERNEL_ID);
257 machines->guests = RB_ROOT_CACHED;
260 void machines__exit(struct machines *machines)
262 machine__exit(&machines->host);
266 struct machine *machines__add(struct machines *machines, pid_t pid,
267 const char *root_dir)
269 struct rb_node **p = &machines->guests.rb_root.rb_node;
270 struct rb_node *parent = NULL;
271 struct machine *pos, *machine = malloc(sizeof(*machine));
272 bool leftmost = true;
277 if (machine__init(machine, root_dir, pid) != 0) {
284 pos = rb_entry(parent, struct machine, rb_node);
293 rb_link_node(&machine->rb_node, parent, p);
294 rb_insert_color_cached(&machine->rb_node, &machines->guests, leftmost);
299 void machines__set_comm_exec(struct machines *machines, bool comm_exec)
303 machines->host.comm_exec = comm_exec;
305 for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) {
306 struct machine *machine = rb_entry(nd, struct machine, rb_node);
308 machine->comm_exec = comm_exec;
312 struct machine *machines__find(struct machines *machines, pid_t pid)
314 struct rb_node **p = &machines->guests.rb_root.rb_node;
315 struct rb_node *parent = NULL;
316 struct machine *machine;
317 struct machine *default_machine = NULL;
319 if (pid == HOST_KERNEL_ID)
320 return &machines->host;
324 machine = rb_entry(parent, struct machine, rb_node);
325 if (pid < machine->pid)
327 else if (pid > machine->pid)
332 default_machine = machine;
335 return default_machine;
338 struct machine *machines__findnew(struct machines *machines, pid_t pid)
341 const char *root_dir = "";
342 struct machine *machine = machines__find(machines, pid);
344 if (machine && (machine->pid == pid))
347 if ((pid != HOST_KERNEL_ID) &&
348 (pid != DEFAULT_GUEST_KERNEL_ID) &&
349 (symbol_conf.guestmount)) {
350 sprintf(path, "%s/%d", symbol_conf.guestmount, pid);
351 if (access(path, R_OK)) {
352 static struct strlist *seen;
355 seen = strlist__new(NULL, NULL);
357 if (!strlist__has_entry(seen, path)) {
358 pr_err("Can't access file %s\n", path);
359 strlist__add(seen, path);
367 machine = machines__add(machines, pid, root_dir);
372 struct machine *machines__find_guest(struct machines *machines, pid_t pid)
374 struct machine *machine = machines__find(machines, pid);
377 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID);
381 void machines__process_guests(struct machines *machines,
382 machine__process_t process, void *data)
386 for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) {
387 struct machine *pos = rb_entry(nd, struct machine, rb_node);
392 void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size)
394 struct rb_node *node;
395 struct machine *machine;
397 machines->host.id_hdr_size = id_hdr_size;
399 for (node = rb_first_cached(&machines->guests); node;
400 node = rb_next(node)) {
401 machine = rb_entry(node, struct machine, rb_node);
402 machine->id_hdr_size = id_hdr_size;
408 static void machine__update_thread_pid(struct machine *machine,
409 struct thread *th, pid_t pid)
411 struct thread *leader;
413 if (pid == th->pid_ || pid == -1 || th->pid_ != -1)
418 if (th->pid_ == th->tid)
421 leader = __machine__findnew_thread(machine, th->pid_, th->pid_);
426 leader->maps = maps__new(machine);
431 if (th->maps == leader->maps)
436 * Maps are created from MMAP events which provide the pid and
437 * tid. Consequently there never should be any maps on a thread
438 * with an unknown pid. Just print an error if there are.
440 if (!maps__empty(th->maps))
441 pr_err("Discarding thread maps for %d:%d\n",
446 th->maps = maps__get(leader->maps);
451 pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid);
456 * Front-end cache - TID lookups come in blocks,
457 * so most of the time we dont have to look up
460 static struct thread*
461 __threads__get_last_match(struct threads *threads, struct machine *machine,
466 th = threads->last_match;
468 if (th->tid == tid) {
469 machine__update_thread_pid(machine, th, pid);
470 return thread__get(th);
473 threads->last_match = NULL;
479 static struct thread*
480 threads__get_last_match(struct threads *threads, struct machine *machine,
483 struct thread *th = NULL;
485 if (perf_singlethreaded)
486 th = __threads__get_last_match(threads, machine, pid, tid);
492 __threads__set_last_match(struct threads *threads, struct thread *th)
494 threads->last_match = th;
498 threads__set_last_match(struct threads *threads, struct thread *th)
500 if (perf_singlethreaded)
501 __threads__set_last_match(threads, th);
505 * Caller must eventually drop thread->refcnt returned with a successful
506 * lookup/new thread inserted.
508 static struct thread *____machine__findnew_thread(struct machine *machine,
509 struct threads *threads,
510 pid_t pid, pid_t tid,
513 struct rb_node **p = &threads->entries.rb_root.rb_node;
514 struct rb_node *parent = NULL;
516 bool leftmost = true;
518 th = threads__get_last_match(threads, machine, pid, tid);
524 th = rb_entry(parent, struct thread, rb_node);
526 if (th->tid == tid) {
527 threads__set_last_match(threads, th);
528 machine__update_thread_pid(machine, th, pid);
529 return thread__get(th);
543 th = thread__new(pid, tid);
545 rb_link_node(&th->rb_node, parent, p);
546 rb_insert_color_cached(&th->rb_node, &threads->entries, leftmost);
549 * We have to initialize maps separately after rb tree is updated.
551 * The reason is that we call machine__findnew_thread
552 * within thread__init_maps to find the thread
553 * leader and that would screwed the rb tree.
555 if (thread__init_maps(th, machine)) {
556 rb_erase_cached(&th->rb_node, &threads->entries);
557 RB_CLEAR_NODE(&th->rb_node);
562 * It is now in the rbtree, get a ref
565 threads__set_last_match(threads, th);
572 struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid)
574 return ____machine__findnew_thread(machine, machine__threads(machine, tid), pid, tid, true);
577 struct thread *machine__findnew_thread(struct machine *machine, pid_t pid,
580 struct threads *threads = machine__threads(machine, tid);
583 down_write(&threads->lock);
584 th = __machine__findnew_thread(machine, pid, tid);
585 up_write(&threads->lock);
589 struct thread *machine__find_thread(struct machine *machine, pid_t pid,
592 struct threads *threads = machine__threads(machine, tid);
595 down_read(&threads->lock);
596 th = ____machine__findnew_thread(machine, threads, pid, tid, false);
597 up_read(&threads->lock);
602 * Threads are identified by pid and tid, and the idle task has pid == tid == 0.
603 * So here a single thread is created for that, but actually there is a separate
604 * idle task per cpu, so there should be one 'struct thread' per cpu, but there
605 * is only 1. That causes problems for some tools, requiring workarounds. For
606 * example get_idle_thread() in builtin-sched.c, or thread_stack__per_cpu().
608 struct thread *machine__idle_thread(struct machine *machine)
610 struct thread *thread = machine__findnew_thread(machine, 0, 0);
612 if (!thread || thread__set_comm(thread, "swapper", 0) ||
613 thread__set_namespaces(thread, 0, NULL))
614 pr_err("problem inserting idle task for machine pid %d\n", machine->pid);
619 struct comm *machine__thread_exec_comm(struct machine *machine,
620 struct thread *thread)
622 if (machine->comm_exec)
623 return thread__exec_comm(thread);
625 return thread__comm(thread);
628 int machine__process_comm_event(struct machine *machine, union perf_event *event,
629 struct perf_sample *sample)
631 struct thread *thread = machine__findnew_thread(machine,
634 bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC;
638 machine->comm_exec = true;
641 perf_event__fprintf_comm(event, stdout);
643 if (thread == NULL ||
644 __thread__set_comm(thread, event->comm.comm, sample->time, exec)) {
645 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
654 int machine__process_namespaces_event(struct machine *machine __maybe_unused,
655 union perf_event *event,
656 struct perf_sample *sample __maybe_unused)
658 struct thread *thread = machine__findnew_thread(machine,
659 event->namespaces.pid,
660 event->namespaces.tid);
663 WARN_ONCE(event->namespaces.nr_namespaces > NR_NAMESPACES,
664 "\nWARNING: kernel seems to support more namespaces than perf"
665 " tool.\nTry updating the perf tool..\n\n");
667 WARN_ONCE(event->namespaces.nr_namespaces < NR_NAMESPACES,
668 "\nWARNING: perf tool seems to support more namespaces than"
669 " the kernel.\nTry updating the kernel..\n\n");
672 perf_event__fprintf_namespaces(event, stdout);
674 if (thread == NULL ||
675 thread__set_namespaces(thread, sample->time, &event->namespaces)) {
676 dump_printf("problem processing PERF_RECORD_NAMESPACES, skipping event.\n");
685 int machine__process_cgroup_event(struct machine *machine,
686 union perf_event *event,
687 struct perf_sample *sample __maybe_unused)
692 perf_event__fprintf_cgroup(event, stdout);
694 cgrp = cgroup__findnew(machine->env, event->cgroup.id, event->cgroup.path);
701 int machine__process_lost_event(struct machine *machine __maybe_unused,
702 union perf_event *event, struct perf_sample *sample __maybe_unused)
704 dump_printf(": id:%" PRI_lu64 ": lost:%" PRI_lu64 "\n",
705 event->lost.id, event->lost.lost);
709 int machine__process_lost_samples_event(struct machine *machine __maybe_unused,
710 union perf_event *event, struct perf_sample *sample)
712 dump_printf(": id:%" PRIu64 ": lost samples :%" PRI_lu64 "\n",
713 sample->id, event->lost_samples.lost);
717 static struct dso *machine__findnew_module_dso(struct machine *machine,
719 const char *filename)
723 down_write(&machine->dsos.lock);
725 dso = __dsos__find(&machine->dsos, m->name, true);
727 dso = __dsos__addnew(&machine->dsos, m->name);
731 dso__set_module_info(dso, m, machine);
732 dso__set_long_name(dso, strdup(filename), true);
733 dso->kernel = DSO_SPACE__KERNEL;
738 up_write(&machine->dsos.lock);
742 int machine__process_aux_event(struct machine *machine __maybe_unused,
743 union perf_event *event)
746 perf_event__fprintf_aux(event, stdout);
750 int machine__process_itrace_start_event(struct machine *machine __maybe_unused,
751 union perf_event *event)
754 perf_event__fprintf_itrace_start(event, stdout);
758 int machine__process_switch_event(struct machine *machine __maybe_unused,
759 union perf_event *event)
762 perf_event__fprintf_switch(event, stdout);
766 static int machine__process_ksymbol_register(struct machine *machine,
767 union perf_event *event,
768 struct perf_sample *sample __maybe_unused)
771 struct map *map = maps__find(&machine->kmaps, event->ksymbol.addr);
774 struct dso *dso = dso__new(event->ksymbol.name);
777 dso->kernel = DSO_SPACE__KERNEL;
778 map = map__new2(0, dso);
786 if (event->ksymbol.ksym_type == PERF_RECORD_KSYMBOL_TYPE_OOL) {
787 map->dso->binary_type = DSO_BINARY_TYPE__OOL;
788 map->dso->data.file_size = event->ksymbol.len;
789 dso__set_loaded(map->dso);
792 map->start = event->ksymbol.addr;
793 map->end = map->start + event->ksymbol.len;
794 maps__insert(&machine->kmaps, map);
796 dso__set_loaded(dso);
798 if (is_bpf_image(event->ksymbol.name)) {
799 dso->binary_type = DSO_BINARY_TYPE__BPF_IMAGE;
800 dso__set_long_name(dso, "", false);
804 sym = symbol__new(map->map_ip(map, map->start),
806 0, 0, event->ksymbol.name);
809 dso__insert_symbol(map->dso, sym);
813 static int machine__process_ksymbol_unregister(struct machine *machine,
814 union perf_event *event,
815 struct perf_sample *sample __maybe_unused)
820 map = maps__find(&machine->kmaps, event->ksymbol.addr);
824 if (map != machine->vmlinux_map)
825 maps__remove(&machine->kmaps, map);
827 sym = dso__find_symbol(map->dso, map->map_ip(map, map->start));
829 dso__delete_symbol(map->dso, sym);
835 int machine__process_ksymbol(struct machine *machine __maybe_unused,
836 union perf_event *event,
837 struct perf_sample *sample)
840 perf_event__fprintf_ksymbol(event, stdout);
842 if (event->ksymbol.flags & PERF_RECORD_KSYMBOL_FLAGS_UNREGISTER)
843 return machine__process_ksymbol_unregister(machine, event,
845 return machine__process_ksymbol_register(machine, event, sample);
848 int machine__process_text_poke(struct machine *machine, union perf_event *event,
849 struct perf_sample *sample __maybe_unused)
851 struct map *map = maps__find(&machine->kmaps, event->text_poke.addr);
852 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
855 perf_event__fprintf_text_poke(event, machine, stdout);
857 if (!event->text_poke.new_len)
860 if (cpumode != PERF_RECORD_MISC_KERNEL) {
861 pr_debug("%s: unsupported cpumode - ignoring\n", __func__);
865 if (map && map->dso) {
866 u8 *new_bytes = event->text_poke.bytes + event->text_poke.old_len;
870 * Kernel maps might be changed when loading symbols so loading
871 * must be done prior to using kernel maps.
874 ret = dso__data_write_cache_addr(map->dso, map, machine,
875 event->text_poke.addr,
877 event->text_poke.new_len);
878 if (ret != event->text_poke.new_len)
879 pr_debug("Failed to write kernel text poke at %#" PRI_lx64 "\n",
880 event->text_poke.addr);
882 pr_debug("Failed to find kernel text poke address map for %#" PRI_lx64 "\n",
883 event->text_poke.addr);
889 static struct map *machine__addnew_module_map(struct machine *machine, u64 start,
890 const char *filename)
892 struct map *map = NULL;
896 if (kmod_path__parse_name(&m, filename))
899 dso = machine__findnew_module_dso(machine, &m, filename);
903 map = map__new2(start, dso);
907 maps__insert(&machine->kmaps, map);
909 /* Put the map here because maps__insert already got it */
912 /* put the dso here, corresponding to machine__findnew_module_dso */
918 size_t machines__fprintf_dsos(struct machines *machines, FILE *fp)
921 size_t ret = __dsos__fprintf(&machines->host.dsos.head, fp);
923 for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) {
924 struct machine *pos = rb_entry(nd, struct machine, rb_node);
925 ret += __dsos__fprintf(&pos->dsos.head, fp);
931 size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp,
932 bool (skip)(struct dso *dso, int parm), int parm)
934 return __dsos__fprintf_buildid(&m->dsos.head, fp, skip, parm);
937 size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp,
938 bool (skip)(struct dso *dso, int parm), int parm)
941 size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm);
943 for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) {
944 struct machine *pos = rb_entry(nd, struct machine, rb_node);
945 ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm);
950 size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp)
954 struct dso *kdso = machine__kernel_dso(machine);
956 if (kdso->has_build_id) {
957 char filename[PATH_MAX];
958 if (dso__build_id_filename(kdso, filename, sizeof(filename),
960 printed += fprintf(fp, "[0] %s\n", filename);
963 for (i = 0; i < vmlinux_path__nr_entries; ++i)
964 printed += fprintf(fp, "[%d] %s\n",
965 i + kdso->has_build_id, vmlinux_path[i]);
970 size_t machine__fprintf(struct machine *machine, FILE *fp)
976 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
977 struct threads *threads = &machine->threads[i];
979 down_read(&threads->lock);
981 ret = fprintf(fp, "Threads: %u\n", threads->nr);
983 for (nd = rb_first_cached(&threads->entries); nd;
985 struct thread *pos = rb_entry(nd, struct thread, rb_node);
987 ret += thread__fprintf(pos, fp);
990 up_read(&threads->lock);
995 static struct dso *machine__get_kernel(struct machine *machine)
997 const char *vmlinux_name = machine->mmap_name;
1000 if (machine__is_host(machine)) {
1001 if (symbol_conf.vmlinux_name)
1002 vmlinux_name = symbol_conf.vmlinux_name;
1004 kernel = machine__findnew_kernel(machine, vmlinux_name,
1005 "[kernel]", DSO_SPACE__KERNEL);
1007 if (symbol_conf.default_guest_vmlinux_name)
1008 vmlinux_name = symbol_conf.default_guest_vmlinux_name;
1010 kernel = machine__findnew_kernel(machine, vmlinux_name,
1012 DSO_SPACE__KERNEL_GUEST);
1015 if (kernel != NULL && (!kernel->has_build_id))
1016 dso__read_running_kernel_build_id(kernel, machine);
1021 struct process_args {
1025 void machine__get_kallsyms_filename(struct machine *machine, char *buf,
1028 if (machine__is_default_guest(machine))
1029 scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms);
1031 scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir);
1034 const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL};
1036 /* Figure out the start address of kernel map from /proc/kallsyms.
1037 * Returns the name of the start symbol in *symbol_name. Pass in NULL as
1038 * symbol_name if it's not that important.
1040 static int machine__get_running_kernel_start(struct machine *machine,
1041 const char **symbol_name,
1042 u64 *start, u64 *end)
1044 char filename[PATH_MAX];
1049 machine__get_kallsyms_filename(machine, filename, PATH_MAX);
1051 if (symbol__restricted_filename(filename, "/proc/kallsyms"))
1054 for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) {
1055 err = kallsyms__get_function_start(filename, name, &addr);
1064 *symbol_name = name;
1068 err = kallsyms__get_function_start(filename, "_etext", &addr);
1075 int machine__create_extra_kernel_map(struct machine *machine,
1077 struct extra_kernel_map *xm)
1082 map = map__new2(xm->start, kernel);
1087 map->pgoff = xm->pgoff;
1089 kmap = map__kmap(map);
1091 strlcpy(kmap->name, xm->name, KMAP_NAME_LEN);
1093 maps__insert(&machine->kmaps, map);
1095 pr_debug2("Added extra kernel map %s %" PRIx64 "-%" PRIx64 "\n",
1096 kmap->name, map->start, map->end);
1103 static u64 find_entry_trampoline(struct dso *dso)
1105 /* Duplicates are removed so lookup all aliases */
1106 const char *syms[] = {
1107 "_entry_trampoline",
1108 "__entry_trampoline_start",
1109 "entry_SYSCALL_64_trampoline",
1111 struct symbol *sym = dso__first_symbol(dso);
1114 for (; sym; sym = dso__next_symbol(sym)) {
1115 if (sym->binding != STB_GLOBAL)
1117 for (i = 0; i < ARRAY_SIZE(syms); i++) {
1118 if (!strcmp(sym->name, syms[i]))
1127 * These values can be used for kernels that do not have symbols for the entry
1128 * trampolines in kallsyms.
1130 #define X86_64_CPU_ENTRY_AREA_PER_CPU 0xfffffe0000000000ULL
1131 #define X86_64_CPU_ENTRY_AREA_SIZE 0x2c000
1132 #define X86_64_ENTRY_TRAMPOLINE 0x6000
1134 /* Map x86_64 PTI entry trampolines */
1135 int machine__map_x86_64_entry_trampolines(struct machine *machine,
1138 struct maps *kmaps = &machine->kmaps;
1139 int nr_cpus_avail, cpu;
1145 * In the vmlinux case, pgoff is a virtual address which must now be
1146 * mapped to a vmlinux offset.
1148 maps__for_each_entry(kmaps, map) {
1149 struct kmap *kmap = __map__kmap(map);
1150 struct map *dest_map;
1152 if (!kmap || !is_entry_trampoline(kmap->name))
1155 dest_map = maps__find(kmaps, map->pgoff);
1156 if (dest_map != map)
1157 map->pgoff = dest_map->map_ip(dest_map, map->pgoff);
1160 if (found || machine->trampolines_mapped)
1163 pgoff = find_entry_trampoline(kernel);
1167 nr_cpus_avail = machine__nr_cpus_avail(machine);
1169 /* Add a 1 page map for each CPU's entry trampoline */
1170 for (cpu = 0; cpu < nr_cpus_avail; cpu++) {
1171 u64 va = X86_64_CPU_ENTRY_AREA_PER_CPU +
1172 cpu * X86_64_CPU_ENTRY_AREA_SIZE +
1173 X86_64_ENTRY_TRAMPOLINE;
1174 struct extra_kernel_map xm = {
1176 .end = va + page_size,
1180 strlcpy(xm.name, ENTRY_TRAMPOLINE_NAME, KMAP_NAME_LEN);
1182 if (machine__create_extra_kernel_map(machine, kernel, &xm) < 0)
1186 machine->trampolines_mapped = nr_cpus_avail;
1191 int __weak machine__create_extra_kernel_maps(struct machine *machine __maybe_unused,
1192 struct dso *kernel __maybe_unused)
1198 __machine__create_kernel_maps(struct machine *machine, struct dso *kernel)
1200 /* In case of renewal the kernel map, destroy previous one */
1201 machine__destroy_kernel_maps(machine);
1203 machine->vmlinux_map = map__new2(0, kernel);
1204 if (machine->vmlinux_map == NULL)
1207 machine->vmlinux_map->map_ip = machine->vmlinux_map->unmap_ip = identity__map_ip;
1208 maps__insert(&machine->kmaps, machine->vmlinux_map);
1212 void machine__destroy_kernel_maps(struct machine *machine)
1215 struct map *map = machine__kernel_map(machine);
1220 kmap = map__kmap(map);
1221 maps__remove(&machine->kmaps, map);
1222 if (kmap && kmap->ref_reloc_sym) {
1223 zfree((char **)&kmap->ref_reloc_sym->name);
1224 zfree(&kmap->ref_reloc_sym);
1227 map__zput(machine->vmlinux_map);
1230 int machines__create_guest_kernel_maps(struct machines *machines)
1233 struct dirent **namelist = NULL;
1235 char path[PATH_MAX];
1239 if (symbol_conf.default_guest_vmlinux_name ||
1240 symbol_conf.default_guest_modules ||
1241 symbol_conf.default_guest_kallsyms) {
1242 machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID);
1245 if (symbol_conf.guestmount) {
1246 items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL);
1249 for (i = 0; i < items; i++) {
1250 if (!isdigit(namelist[i]->d_name[0])) {
1251 /* Filter out . and .. */
1254 pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10);
1255 if ((*endp != '\0') ||
1256 (endp == namelist[i]->d_name) ||
1257 (errno == ERANGE)) {
1258 pr_debug("invalid directory (%s). Skipping.\n",
1259 namelist[i]->d_name);
1262 sprintf(path, "%s/%s/proc/kallsyms",
1263 symbol_conf.guestmount,
1264 namelist[i]->d_name);
1265 ret = access(path, R_OK);
1267 pr_debug("Can't access file %s\n", path);
1270 machines__create_kernel_maps(machines, pid);
1279 void machines__destroy_kernel_maps(struct machines *machines)
1281 struct rb_node *next = rb_first_cached(&machines->guests);
1283 machine__destroy_kernel_maps(&machines->host);
1286 struct machine *pos = rb_entry(next, struct machine, rb_node);
1288 next = rb_next(&pos->rb_node);
1289 rb_erase_cached(&pos->rb_node, &machines->guests);
1290 machine__delete(pos);
1294 int machines__create_kernel_maps(struct machines *machines, pid_t pid)
1296 struct machine *machine = machines__findnew(machines, pid);
1298 if (machine == NULL)
1301 return machine__create_kernel_maps(machine);
1304 int machine__load_kallsyms(struct machine *machine, const char *filename)
1306 struct map *map = machine__kernel_map(machine);
1307 int ret = __dso__load_kallsyms(map->dso, filename, map, true);
1310 dso__set_loaded(map->dso);
1312 * Since /proc/kallsyms will have multiple sessions for the
1313 * kernel, with modules between them, fixup the end of all
1316 maps__fixup_end(&machine->kmaps);
1322 int machine__load_vmlinux_path(struct machine *machine)
1324 struct map *map = machine__kernel_map(machine);
1325 int ret = dso__load_vmlinux_path(map->dso, map);
1328 dso__set_loaded(map->dso);
1333 static char *get_kernel_version(const char *root_dir)
1335 char version[PATH_MAX];
1338 const char *prefix = "Linux version ";
1340 sprintf(version, "%s/proc/version", root_dir);
1341 file = fopen(version, "r");
1345 tmp = fgets(version, sizeof(version), file);
1350 name = strstr(version, prefix);
1353 name += strlen(prefix);
1354 tmp = strchr(name, ' ');
1358 return strdup(name);
1361 static bool is_kmod_dso(struct dso *dso)
1363 return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE ||
1364 dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE;
1367 static int maps__set_module_path(struct maps *maps, const char *path, struct kmod_path *m)
1370 struct map *map = maps__find_by_name(maps, m->name);
1375 long_name = strdup(path);
1376 if (long_name == NULL)
1379 dso__set_long_name(map->dso, long_name, true);
1380 dso__kernel_module_get_build_id(map->dso, "");
1383 * Full name could reveal us kmod compression, so
1384 * we need to update the symtab_type if needed.
1386 if (m->comp && is_kmod_dso(map->dso)) {
1387 map->dso->symtab_type++;
1388 map->dso->comp = m->comp;
1394 static int maps__set_modules_path_dir(struct maps *maps, const char *dir_name, int depth)
1396 struct dirent *dent;
1397 DIR *dir = opendir(dir_name);
1401 pr_debug("%s: cannot open %s dir\n", __func__, dir_name);
1405 while ((dent = readdir(dir)) != NULL) {
1406 char path[PATH_MAX];
1409 /*sshfs might return bad dent->d_type, so we have to stat*/
1410 snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name);
1411 if (stat(path, &st))
1414 if (S_ISDIR(st.st_mode)) {
1415 if (!strcmp(dent->d_name, ".") ||
1416 !strcmp(dent->d_name, ".."))
1419 /* Do not follow top-level source and build symlinks */
1421 if (!strcmp(dent->d_name, "source") ||
1422 !strcmp(dent->d_name, "build"))
1426 ret = maps__set_modules_path_dir(maps, path, depth + 1);
1432 ret = kmod_path__parse_name(&m, dent->d_name);
1437 ret = maps__set_module_path(maps, path, &m);
1451 static int machine__set_modules_path(struct machine *machine)
1454 char modules_path[PATH_MAX];
1456 version = get_kernel_version(machine->root_dir);
1460 snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s",
1461 machine->root_dir, version);
1464 return maps__set_modules_path_dir(&machine->kmaps, modules_path, 0);
1466 int __weak arch__fix_module_text_start(u64 *start __maybe_unused,
1467 u64 *size __maybe_unused,
1468 const char *name __maybe_unused)
1473 static int machine__create_module(void *arg, const char *name, u64 start,
1476 struct machine *machine = arg;
1479 if (arch__fix_module_text_start(&start, &size, name) < 0)
1482 map = machine__addnew_module_map(machine, start, name);
1485 map->end = start + size;
1487 dso__kernel_module_get_build_id(map->dso, machine->root_dir);
1492 static int machine__create_modules(struct machine *machine)
1494 const char *modules;
1495 char path[PATH_MAX];
1497 if (machine__is_default_guest(machine)) {
1498 modules = symbol_conf.default_guest_modules;
1500 snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir);
1504 if (symbol__restricted_filename(modules, "/proc/modules"))
1507 if (modules__parse(modules, machine, machine__create_module))
1510 if (!machine__set_modules_path(machine))
1513 pr_debug("Problems setting modules path maps, continuing anyway...\n");
1518 static void machine__set_kernel_mmap(struct machine *machine,
1521 machine->vmlinux_map->start = start;
1522 machine->vmlinux_map->end = end;
1524 * Be a bit paranoid here, some perf.data file came with
1525 * a zero sized synthesized MMAP event for the kernel.
1527 if (start == 0 && end == 0)
1528 machine->vmlinux_map->end = ~0ULL;
1531 static void machine__update_kernel_mmap(struct machine *machine,
1534 struct map *map = machine__kernel_map(machine);
1537 maps__remove(&machine->kmaps, map);
1539 machine__set_kernel_mmap(machine, start, end);
1541 maps__insert(&machine->kmaps, map);
1545 int machine__create_kernel_maps(struct machine *machine)
1547 struct dso *kernel = machine__get_kernel(machine);
1548 const char *name = NULL;
1550 u64 start = 0, end = ~0ULL;
1556 ret = __machine__create_kernel_maps(machine, kernel);
1560 if (symbol_conf.use_modules && machine__create_modules(machine) < 0) {
1561 if (machine__is_host(machine))
1562 pr_debug("Problems creating module maps, "
1563 "continuing anyway...\n");
1565 pr_debug("Problems creating module maps for guest %d, "
1566 "continuing anyway...\n", machine->pid);
1569 if (!machine__get_running_kernel_start(machine, &name, &start, &end)) {
1571 map__set_kallsyms_ref_reloc_sym(machine->vmlinux_map, name, start)) {
1572 machine__destroy_kernel_maps(machine);
1578 * we have a real start address now, so re-order the kmaps
1579 * assume it's the last in the kmaps
1581 machine__update_kernel_mmap(machine, start, end);
1584 if (machine__create_extra_kernel_maps(machine, kernel))
1585 pr_debug("Problems creating extra kernel maps, continuing anyway...\n");
1588 /* update end address of the kernel map using adjacent module address */
1589 map = map__next(machine__kernel_map(machine));
1591 machine__set_kernel_mmap(machine, start, map->start);
1599 static bool machine__uses_kcore(struct machine *machine)
1603 list_for_each_entry(dso, &machine->dsos.head, node) {
1604 if (dso__is_kcore(dso))
1611 static bool perf_event__is_extra_kernel_mmap(struct machine *machine,
1612 struct extra_kernel_map *xm)
1614 return machine__is(machine, "x86_64") &&
1615 is_entry_trampoline(xm->name);
1618 static int machine__process_extra_kernel_map(struct machine *machine,
1619 struct extra_kernel_map *xm)
1621 struct dso *kernel = machine__kernel_dso(machine);
1626 return machine__create_extra_kernel_map(machine, kernel, xm);
1629 static int machine__process_kernel_mmap_event(struct machine *machine,
1630 struct extra_kernel_map *xm,
1631 struct build_id *bid)
1634 enum dso_space_type dso_space;
1635 bool is_kernel_mmap;
1637 /* If we have maps from kcore then we do not need or want any others */
1638 if (machine__uses_kcore(machine))
1641 if (machine__is_host(machine))
1642 dso_space = DSO_SPACE__KERNEL;
1644 dso_space = DSO_SPACE__KERNEL_GUEST;
1646 is_kernel_mmap = memcmp(xm->name, machine->mmap_name,
1647 strlen(machine->mmap_name) - 1) == 0;
1648 if (xm->name[0] == '/' ||
1649 (!is_kernel_mmap && xm->name[0] == '[')) {
1650 map = machine__addnew_module_map(machine, xm->start,
1655 map->end = map->start + xm->end - xm->start;
1657 if (build_id__is_defined(bid))
1658 dso__set_build_id(map->dso, bid);
1660 } else if (is_kernel_mmap) {
1661 const char *symbol_name = (xm->name + strlen(machine->mmap_name));
1663 * Should be there already, from the build-id table in
1666 struct dso *kernel = NULL;
1669 down_read(&machine->dsos.lock);
1671 list_for_each_entry(dso, &machine->dsos.head, node) {
1674 * The cpumode passed to is_kernel_module is not the
1675 * cpumode of *this* event. If we insist on passing
1676 * correct cpumode to is_kernel_module, we should
1677 * record the cpumode when we adding this dso to the
1680 * However we don't really need passing correct
1681 * cpumode. We know the correct cpumode must be kernel
1682 * mode (if not, we should not link it onto kernel_dsos
1685 * Therefore, we pass PERF_RECORD_MISC_CPUMODE_UNKNOWN.
1686 * is_kernel_module() treats it as a kernel cpumode.
1690 is_kernel_module(dso->long_name,
1691 PERF_RECORD_MISC_CPUMODE_UNKNOWN))
1699 up_read(&machine->dsos.lock);
1702 kernel = machine__findnew_dso(machine, machine->mmap_name);
1706 kernel->kernel = dso_space;
1707 if (__machine__create_kernel_maps(machine, kernel) < 0) {
1712 if (strstr(kernel->long_name, "vmlinux"))
1713 dso__set_short_name(kernel, "[kernel.vmlinux]", false);
1715 machine__update_kernel_mmap(machine, xm->start, xm->end);
1717 if (build_id__is_defined(bid))
1718 dso__set_build_id(kernel, bid);
1721 * Avoid using a zero address (kptr_restrict) for the ref reloc
1722 * symbol. Effectively having zero here means that at record
1723 * time /proc/sys/kernel/kptr_restrict was non zero.
1725 if (xm->pgoff != 0) {
1726 map__set_kallsyms_ref_reloc_sym(machine->vmlinux_map,
1731 if (machine__is_default_guest(machine)) {
1733 * preload dso of guest kernel and modules
1735 dso__load(kernel, machine__kernel_map(machine));
1737 } else if (perf_event__is_extra_kernel_mmap(machine, xm)) {
1738 return machine__process_extra_kernel_map(machine, xm);
1745 int machine__process_mmap2_event(struct machine *machine,
1746 union perf_event *event,
1747 struct perf_sample *sample)
1749 struct thread *thread;
1751 struct dso_id dso_id = {
1752 .maj = event->mmap2.maj,
1753 .min = event->mmap2.min,
1754 .ino = event->mmap2.ino,
1755 .ino_generation = event->mmap2.ino_generation,
1757 struct build_id __bid, *bid = NULL;
1761 perf_event__fprintf_mmap2(event, stdout);
1763 if (event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID) {
1765 build_id__init(bid, event->mmap2.build_id, event->mmap2.build_id_size);
1768 if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
1769 sample->cpumode == PERF_RECORD_MISC_KERNEL) {
1770 struct extra_kernel_map xm = {
1771 .start = event->mmap2.start,
1772 .end = event->mmap2.start + event->mmap2.len,
1773 .pgoff = event->mmap2.pgoff,
1776 strlcpy(xm.name, event->mmap2.filename, KMAP_NAME_LEN);
1777 ret = machine__process_kernel_mmap_event(machine, &xm, bid);
1783 thread = machine__findnew_thread(machine, event->mmap2.pid,
1788 map = map__new(machine, event->mmap2.start,
1789 event->mmap2.len, event->mmap2.pgoff,
1790 &dso_id, event->mmap2.prot,
1791 event->mmap2.flags, bid,
1792 event->mmap2.filename, thread);
1795 goto out_problem_map;
1797 ret = thread__insert_map(thread, map);
1799 goto out_problem_insert;
1801 thread__put(thread);
1808 thread__put(thread);
1810 dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n");
1814 int machine__process_mmap_event(struct machine *machine, union perf_event *event,
1815 struct perf_sample *sample)
1817 struct thread *thread;
1823 perf_event__fprintf_mmap(event, stdout);
1825 if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
1826 sample->cpumode == PERF_RECORD_MISC_KERNEL) {
1827 struct extra_kernel_map xm = {
1828 .start = event->mmap.start,
1829 .end = event->mmap.start + event->mmap.len,
1830 .pgoff = event->mmap.pgoff,
1833 strlcpy(xm.name, event->mmap.filename, KMAP_NAME_LEN);
1834 ret = machine__process_kernel_mmap_event(machine, &xm, NULL);
1840 thread = machine__findnew_thread(machine, event->mmap.pid,
1845 if (!(event->header.misc & PERF_RECORD_MISC_MMAP_DATA))
1848 map = map__new(machine, event->mmap.start,
1849 event->mmap.len, event->mmap.pgoff,
1850 NULL, prot, 0, NULL, event->mmap.filename, thread);
1853 goto out_problem_map;
1855 ret = thread__insert_map(thread, map);
1857 goto out_problem_insert;
1859 thread__put(thread);
1866 thread__put(thread);
1868 dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
1872 static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock)
1874 struct threads *threads = machine__threads(machine, th->tid);
1876 if (threads->last_match == th)
1877 threads__set_last_match(threads, NULL);
1880 down_write(&threads->lock);
1882 BUG_ON(refcount_read(&th->refcnt) == 0);
1884 rb_erase_cached(&th->rb_node, &threads->entries);
1885 RB_CLEAR_NODE(&th->rb_node);
1888 * Move it first to the dead_threads list, then drop the reference,
1889 * if this is the last reference, then the thread__delete destructor
1890 * will be called and we will remove it from the dead_threads list.
1892 list_add_tail(&th->node, &threads->dead);
1895 * We need to do the put here because if this is the last refcount,
1896 * then we will be touching the threads->dead head when removing the
1902 up_write(&threads->lock);
1905 void machine__remove_thread(struct machine *machine, struct thread *th)
1907 return __machine__remove_thread(machine, th, true);
1910 int machine__process_fork_event(struct machine *machine, union perf_event *event,
1911 struct perf_sample *sample)
1913 struct thread *thread = machine__find_thread(machine,
1916 struct thread *parent = machine__findnew_thread(machine,
1919 bool do_maps_clone = true;
1923 perf_event__fprintf_task(event, stdout);
1926 * There may be an existing thread that is not actually the parent,
1927 * either because we are processing events out of order, or because the
1928 * (fork) event that would have removed the thread was lost. Assume the
1929 * latter case and continue on as best we can.
1931 if (parent->pid_ != (pid_t)event->fork.ppid) {
1932 dump_printf("removing erroneous parent thread %d/%d\n",
1933 parent->pid_, parent->tid);
1934 machine__remove_thread(machine, parent);
1935 thread__put(parent);
1936 parent = machine__findnew_thread(machine, event->fork.ppid,
1940 /* if a thread currently exists for the thread id remove it */
1941 if (thread != NULL) {
1942 machine__remove_thread(machine, thread);
1943 thread__put(thread);
1946 thread = machine__findnew_thread(machine, event->fork.pid,
1949 * When synthesizing FORK events, we are trying to create thread
1950 * objects for the already running tasks on the machine.
1952 * Normally, for a kernel FORK event, we want to clone the parent's
1953 * maps because that is what the kernel just did.
1955 * But when synthesizing, this should not be done. If we do, we end up
1956 * with overlapping maps as we process the synthesized MMAP2 events that
1957 * get delivered shortly thereafter.
1959 * Use the FORK event misc flags in an internal way to signal this
1960 * situation, so we can elide the map clone when appropriate.
1962 if (event->fork.header.misc & PERF_RECORD_MISC_FORK_EXEC)
1963 do_maps_clone = false;
1965 if (thread == NULL || parent == NULL ||
1966 thread__fork(thread, parent, sample->time, do_maps_clone) < 0) {
1967 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
1970 thread__put(thread);
1971 thread__put(parent);
1976 int machine__process_exit_event(struct machine *machine, union perf_event *event,
1977 struct perf_sample *sample __maybe_unused)
1979 struct thread *thread = machine__find_thread(machine,
1984 perf_event__fprintf_task(event, stdout);
1986 if (thread != NULL) {
1987 thread__exited(thread);
1988 thread__put(thread);
1994 int machine__process_event(struct machine *machine, union perf_event *event,
1995 struct perf_sample *sample)
1999 switch (event->header.type) {
2000 case PERF_RECORD_COMM:
2001 ret = machine__process_comm_event(machine, event, sample); break;
2002 case PERF_RECORD_MMAP:
2003 ret = machine__process_mmap_event(machine, event, sample); break;
2004 case PERF_RECORD_NAMESPACES:
2005 ret = machine__process_namespaces_event(machine, event, sample); break;
2006 case PERF_RECORD_CGROUP:
2007 ret = machine__process_cgroup_event(machine, event, sample); break;
2008 case PERF_RECORD_MMAP2:
2009 ret = machine__process_mmap2_event(machine, event, sample); break;
2010 case PERF_RECORD_FORK:
2011 ret = machine__process_fork_event(machine, event, sample); break;
2012 case PERF_RECORD_EXIT:
2013 ret = machine__process_exit_event(machine, event, sample); break;
2014 case PERF_RECORD_LOST:
2015 ret = machine__process_lost_event(machine, event, sample); break;
2016 case PERF_RECORD_AUX:
2017 ret = machine__process_aux_event(machine, event); break;
2018 case PERF_RECORD_ITRACE_START:
2019 ret = machine__process_itrace_start_event(machine, event); break;
2020 case PERF_RECORD_LOST_SAMPLES:
2021 ret = machine__process_lost_samples_event(machine, event, sample); break;
2022 case PERF_RECORD_SWITCH:
2023 case PERF_RECORD_SWITCH_CPU_WIDE:
2024 ret = machine__process_switch_event(machine, event); break;
2025 case PERF_RECORD_KSYMBOL:
2026 ret = machine__process_ksymbol(machine, event, sample); break;
2027 case PERF_RECORD_BPF_EVENT:
2028 ret = machine__process_bpf(machine, event, sample); break;
2029 case PERF_RECORD_TEXT_POKE:
2030 ret = machine__process_text_poke(machine, event, sample); break;
2039 static bool symbol__match_regex(struct symbol *sym, regex_t *regex)
2041 if (!regexec(regex, sym->name, 0, NULL, 0))
2046 static void ip__resolve_ams(struct thread *thread,
2047 struct addr_map_symbol *ams,
2050 struct addr_location al;
2052 memset(&al, 0, sizeof(al));
2054 * We cannot use the header.misc hint to determine whether a
2055 * branch stack address is user, kernel, guest, hypervisor.
2056 * Branches may straddle the kernel/user/hypervisor boundaries.
2057 * Thus, we have to try consecutively until we find a match
2058 * or else, the symbol is unknown
2060 thread__find_cpumode_addr_location(thread, ip, &al);
2063 ams->al_addr = al.addr;
2064 ams->ms.maps = al.maps;
2065 ams->ms.sym = al.sym;
2066 ams->ms.map = al.map;
2068 ams->data_page_size = 0;
2071 static void ip__resolve_data(struct thread *thread,
2072 u8 m, struct addr_map_symbol *ams,
2073 u64 addr, u64 phys_addr, u64 daddr_page_size)
2075 struct addr_location al;
2077 memset(&al, 0, sizeof(al));
2079 thread__find_symbol(thread, m, addr, &al);
2082 ams->al_addr = al.addr;
2083 ams->ms.maps = al.maps;
2084 ams->ms.sym = al.sym;
2085 ams->ms.map = al.map;
2086 ams->phys_addr = phys_addr;
2087 ams->data_page_size = daddr_page_size;
2090 struct mem_info *sample__resolve_mem(struct perf_sample *sample,
2091 struct addr_location *al)
2093 struct mem_info *mi = mem_info__new();
2098 ip__resolve_ams(al->thread, &mi->iaddr, sample->ip);
2099 ip__resolve_data(al->thread, al->cpumode, &mi->daddr,
2100 sample->addr, sample->phys_addr,
2101 sample->data_page_size);
2102 mi->data_src.val = sample->data_src;
2107 static char *callchain_srcline(struct map_symbol *ms, u64 ip)
2109 struct map *map = ms->map;
2110 char *srcline = NULL;
2112 if (!map || callchain_param.key == CCKEY_FUNCTION)
2115 srcline = srcline__tree_find(&map->dso->srclines, ip);
2117 bool show_sym = false;
2118 bool show_addr = callchain_param.key == CCKEY_ADDRESS;
2120 srcline = get_srcline(map->dso, map__rip_2objdump(map, ip),
2121 ms->sym, show_sym, show_addr, ip);
2122 srcline__tree_insert(&map->dso->srclines, ip, srcline);
2133 static int add_callchain_ip(struct thread *thread,
2134 struct callchain_cursor *cursor,
2135 struct symbol **parent,
2136 struct addr_location *root_al,
2140 struct branch_flags *flags,
2141 struct iterations *iter,
2144 struct map_symbol ms;
2145 struct addr_location al;
2146 int nr_loop_iter = 0;
2147 u64 iter_cycles = 0;
2148 const char *srcline = NULL;
2153 thread__find_cpumode_addr_location(thread, ip, &al);
2155 if (ip >= PERF_CONTEXT_MAX) {
2157 case PERF_CONTEXT_HV:
2158 *cpumode = PERF_RECORD_MISC_HYPERVISOR;
2160 case PERF_CONTEXT_KERNEL:
2161 *cpumode = PERF_RECORD_MISC_KERNEL;
2163 case PERF_CONTEXT_USER:
2164 *cpumode = PERF_RECORD_MISC_USER;
2167 pr_debug("invalid callchain context: "
2168 "%"PRId64"\n", (s64) ip);
2170 * It seems the callchain is corrupted.
2173 callchain_cursor_reset(cursor);
2178 thread__find_symbol(thread, *cpumode, ip, &al);
2181 if (al.sym != NULL) {
2182 if (perf_hpp_list.parent && !*parent &&
2183 symbol__match_regex(al.sym, &parent_regex))
2185 else if (have_ignore_callees && root_al &&
2186 symbol__match_regex(al.sym, &ignore_callees_regex)) {
2187 /* Treat this symbol as the root,
2188 forgetting its callees. */
2190 callchain_cursor_reset(cursor);
2194 if (symbol_conf.hide_unresolved && al.sym == NULL)
2198 nr_loop_iter = iter->nr_loop_iter;
2199 iter_cycles = iter->cycles;
2205 srcline = callchain_srcline(&ms, al.addr);
2206 return callchain_cursor_append(cursor, ip, &ms,
2207 branch, flags, nr_loop_iter,
2208 iter_cycles, branch_from, srcline);
2211 struct branch_info *sample__resolve_bstack(struct perf_sample *sample,
2212 struct addr_location *al)
2215 const struct branch_stack *bs = sample->branch_stack;
2216 struct branch_entry *entries = perf_sample__branch_entries(sample);
2217 struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info));
2222 for (i = 0; i < bs->nr; i++) {
2223 ip__resolve_ams(al->thread, &bi[i].to, entries[i].to);
2224 ip__resolve_ams(al->thread, &bi[i].from, entries[i].from);
2225 bi[i].flags = entries[i].flags;
2230 static void save_iterations(struct iterations *iter,
2231 struct branch_entry *be, int nr)
2235 iter->nr_loop_iter++;
2238 for (i = 0; i < nr; i++)
2239 iter->cycles += be[i].flags.cycles;
2244 #define NO_ENTRY 0xff
2246 #define PERF_MAX_BRANCH_DEPTH 127
2249 static int remove_loops(struct branch_entry *l, int nr,
2250 struct iterations *iter)
2253 unsigned char chash[CHASHSZ];
2255 memset(chash, NO_ENTRY, sizeof(chash));
2257 BUG_ON(PERF_MAX_BRANCH_DEPTH > 255);
2259 for (i = 0; i < nr; i++) {
2260 int h = hash_64(l[i].from, CHASHBITS) % CHASHSZ;
2262 /* no collision handling for now */
2263 if (chash[h] == NO_ENTRY) {
2265 } else if (l[chash[h]].from == l[i].from) {
2266 bool is_loop = true;
2267 /* check if it is a real loop */
2269 for (j = chash[h]; j < i && i + off < nr; j++, off++)
2270 if (l[j].from != l[i + off].from) {
2277 save_iterations(iter + i + off,
2280 memmove(iter + i, iter + i + off,
2283 memmove(l + i, l + i + off,
2294 static int lbr_callchain_add_kernel_ip(struct thread *thread,
2295 struct callchain_cursor *cursor,
2296 struct perf_sample *sample,
2297 struct symbol **parent,
2298 struct addr_location *root_al,
2300 bool callee, int end)
2302 struct ip_callchain *chain = sample->callchain;
2303 u8 cpumode = PERF_RECORD_MISC_USER;
2307 for (i = 0; i < end + 1; i++) {
2308 err = add_callchain_ip(thread, cursor, parent,
2309 root_al, &cpumode, chain->ips[i],
2310 false, NULL, NULL, branch_from);
2317 for (i = end; i >= 0; i--) {
2318 err = add_callchain_ip(thread, cursor, parent,
2319 root_al, &cpumode, chain->ips[i],
2320 false, NULL, NULL, branch_from);
2328 static void save_lbr_cursor_node(struct thread *thread,
2329 struct callchain_cursor *cursor,
2332 struct lbr_stitch *lbr_stitch = thread->lbr_stitch;
2337 if (cursor->pos == cursor->nr) {
2338 lbr_stitch->prev_lbr_cursor[idx].valid = false;
2343 cursor->curr = cursor->first;
2345 cursor->curr = cursor->curr->next;
2346 memcpy(&lbr_stitch->prev_lbr_cursor[idx], cursor->curr,
2347 sizeof(struct callchain_cursor_node));
2349 lbr_stitch->prev_lbr_cursor[idx].valid = true;
2353 static int lbr_callchain_add_lbr_ip(struct thread *thread,
2354 struct callchain_cursor *cursor,
2355 struct perf_sample *sample,
2356 struct symbol **parent,
2357 struct addr_location *root_al,
2361 struct branch_stack *lbr_stack = sample->branch_stack;
2362 struct branch_entry *entries = perf_sample__branch_entries(sample);
2363 u8 cpumode = PERF_RECORD_MISC_USER;
2364 int lbr_nr = lbr_stack->nr;
2365 struct branch_flags *flags;
2370 * The curr and pos are not used in writing session. They are cleared
2371 * in callchain_cursor_commit() when the writing session is closed.
2372 * Using curr and pos to track the current cursor node.
2374 if (thread->lbr_stitch) {
2375 cursor->curr = NULL;
2376 cursor->pos = cursor->nr;
2378 cursor->curr = cursor->first;
2379 for (i = 0; i < (int)(cursor->nr - 1); i++)
2380 cursor->curr = cursor->curr->next;
2385 /* Add LBR ip from first entries.to */
2387 flags = &entries[0].flags;
2388 *branch_from = entries[0].from;
2389 err = add_callchain_ip(thread, cursor, parent,
2390 root_al, &cpumode, ip,
2397 * The number of cursor node increases.
2398 * Move the current cursor node.
2399 * But does not need to save current cursor node for entry 0.
2400 * It's impossible to stitch the whole LBRs of previous sample.
2402 if (thread->lbr_stitch && (cursor->pos != cursor->nr)) {
2404 cursor->curr = cursor->first;
2406 cursor->curr = cursor->curr->next;
2410 /* Add LBR ip from entries.from one by one. */
2411 for (i = 0; i < lbr_nr; i++) {
2412 ip = entries[i].from;
2413 flags = &entries[i].flags;
2414 err = add_callchain_ip(thread, cursor, parent,
2415 root_al, &cpumode, ip,
2420 save_lbr_cursor_node(thread, cursor, i);
2425 /* Add LBR ip from entries.from one by one. */
2426 for (i = lbr_nr - 1; i >= 0; i--) {
2427 ip = entries[i].from;
2428 flags = &entries[i].flags;
2429 err = add_callchain_ip(thread, cursor, parent,
2430 root_al, &cpumode, ip,
2435 save_lbr_cursor_node(thread, cursor, i);
2438 /* Add LBR ip from first entries.to */
2440 flags = &entries[0].flags;
2441 *branch_from = entries[0].from;
2442 err = add_callchain_ip(thread, cursor, parent,
2443 root_al, &cpumode, ip,
2452 static int lbr_callchain_add_stitched_lbr_ip(struct thread *thread,
2453 struct callchain_cursor *cursor)
2455 struct lbr_stitch *lbr_stitch = thread->lbr_stitch;
2456 struct callchain_cursor_node *cnode;
2457 struct stitch_list *stitch_node;
2460 list_for_each_entry(stitch_node, &lbr_stitch->lists, node) {
2461 cnode = &stitch_node->cursor;
2463 err = callchain_cursor_append(cursor, cnode->ip,
2466 &cnode->branch_flags,
2467 cnode->nr_loop_iter,
2477 static struct stitch_list *get_stitch_node(struct thread *thread)
2479 struct lbr_stitch *lbr_stitch = thread->lbr_stitch;
2480 struct stitch_list *stitch_node;
2482 if (!list_empty(&lbr_stitch->free_lists)) {
2483 stitch_node = list_first_entry(&lbr_stitch->free_lists,
2484 struct stitch_list, node);
2485 list_del(&stitch_node->node);
2490 return malloc(sizeof(struct stitch_list));
2493 static bool has_stitched_lbr(struct thread *thread,
2494 struct perf_sample *cur,
2495 struct perf_sample *prev,
2496 unsigned int max_lbr,
2499 struct branch_stack *cur_stack = cur->branch_stack;
2500 struct branch_entry *cur_entries = perf_sample__branch_entries(cur);
2501 struct branch_stack *prev_stack = prev->branch_stack;
2502 struct branch_entry *prev_entries = perf_sample__branch_entries(prev);
2503 struct lbr_stitch *lbr_stitch = thread->lbr_stitch;
2504 int i, j, nr_identical_branches = 0;
2505 struct stitch_list *stitch_node;
2506 u64 cur_base, distance;
2508 if (!cur_stack || !prev_stack)
2511 /* Find the physical index of the base-of-stack for current sample. */
2512 cur_base = max_lbr - cur_stack->nr + cur_stack->hw_idx + 1;
2514 distance = (prev_stack->hw_idx > cur_base) ? (prev_stack->hw_idx - cur_base) :
2515 (max_lbr + prev_stack->hw_idx - cur_base);
2516 /* Previous sample has shorter stack. Nothing can be stitched. */
2517 if (distance + 1 > prev_stack->nr)
2521 * Check if there are identical LBRs between two samples.
2522 * Identical LBRs must have same from, to and flags values. Also,
2523 * they have to be saved in the same LBR registers (same physical
2526 * Starts from the base-of-stack of current sample.
2528 for (i = distance, j = cur_stack->nr - 1; (i >= 0) && (j >= 0); i--, j--) {
2529 if ((prev_entries[i].from != cur_entries[j].from) ||
2530 (prev_entries[i].to != cur_entries[j].to) ||
2531 (prev_entries[i].flags.value != cur_entries[j].flags.value))
2533 nr_identical_branches++;
2536 if (!nr_identical_branches)
2540 * Save the LBRs between the base-of-stack of previous sample
2541 * and the base-of-stack of current sample into lbr_stitch->lists.
2542 * These LBRs will be stitched later.
2544 for (i = prev_stack->nr - 1; i > (int)distance; i--) {
2546 if (!lbr_stitch->prev_lbr_cursor[i].valid)
2549 stitch_node = get_stitch_node(thread);
2553 memcpy(&stitch_node->cursor, &lbr_stitch->prev_lbr_cursor[i],
2554 sizeof(struct callchain_cursor_node));
2557 list_add(&stitch_node->node, &lbr_stitch->lists);
2559 list_add_tail(&stitch_node->node, &lbr_stitch->lists);
2565 static bool alloc_lbr_stitch(struct thread *thread, unsigned int max_lbr)
2567 if (thread->lbr_stitch)
2570 thread->lbr_stitch = zalloc(sizeof(*thread->lbr_stitch));
2571 if (!thread->lbr_stitch)
2574 thread->lbr_stitch->prev_lbr_cursor = calloc(max_lbr + 1, sizeof(struct callchain_cursor_node));
2575 if (!thread->lbr_stitch->prev_lbr_cursor)
2576 goto free_lbr_stitch;
2578 INIT_LIST_HEAD(&thread->lbr_stitch->lists);
2579 INIT_LIST_HEAD(&thread->lbr_stitch->free_lists);
2584 zfree(&thread->lbr_stitch);
2586 pr_warning("Failed to allocate space for stitched LBRs. Disable LBR stitch\n");
2587 thread->lbr_stitch_enable = false;
2592 * Resolve LBR callstack chain sample
2594 * 1 on success get LBR callchain information
2595 * 0 no available LBR callchain information, should try fp
2596 * negative error code on other errors.
2598 static int resolve_lbr_callchain_sample(struct thread *thread,
2599 struct callchain_cursor *cursor,
2600 struct perf_sample *sample,
2601 struct symbol **parent,
2602 struct addr_location *root_al,
2604 unsigned int max_lbr)
2606 bool callee = (callchain_param.order == ORDER_CALLEE);
2607 struct ip_callchain *chain = sample->callchain;
2608 int chain_nr = min(max_stack, (int)chain->nr), i;
2609 struct lbr_stitch *lbr_stitch;
2610 bool stitched_lbr = false;
2611 u64 branch_from = 0;
2614 for (i = 0; i < chain_nr; i++) {
2615 if (chain->ips[i] == PERF_CONTEXT_USER)
2619 /* LBR only affects the user callchain */
2623 if (thread->lbr_stitch_enable && !sample->no_hw_idx &&
2624 (max_lbr > 0) && alloc_lbr_stitch(thread, max_lbr)) {
2625 lbr_stitch = thread->lbr_stitch;
2627 stitched_lbr = has_stitched_lbr(thread, sample,
2628 &lbr_stitch->prev_sample,
2631 if (!stitched_lbr && !list_empty(&lbr_stitch->lists)) {
2632 list_replace_init(&lbr_stitch->lists,
2633 &lbr_stitch->free_lists);
2635 memcpy(&lbr_stitch->prev_sample, sample, sizeof(*sample));
2640 err = lbr_callchain_add_kernel_ip(thread, cursor, sample,
2641 parent, root_al, branch_from,
2646 err = lbr_callchain_add_lbr_ip(thread, cursor, sample, parent,
2647 root_al, &branch_from, true);
2652 err = lbr_callchain_add_stitched_lbr_ip(thread, cursor);
2659 err = lbr_callchain_add_stitched_lbr_ip(thread, cursor);
2663 err = lbr_callchain_add_lbr_ip(thread, cursor, sample, parent,
2664 root_al, &branch_from, false);
2669 err = lbr_callchain_add_kernel_ip(thread, cursor, sample,
2670 parent, root_al, branch_from,
2678 return (err < 0) ? err : 0;
2681 static int find_prev_cpumode(struct ip_callchain *chain, struct thread *thread,
2682 struct callchain_cursor *cursor,
2683 struct symbol **parent,
2684 struct addr_location *root_al,
2685 u8 *cpumode, int ent)
2689 while (--ent >= 0) {
2690 u64 ip = chain->ips[ent];
2692 if (ip >= PERF_CONTEXT_MAX) {
2693 err = add_callchain_ip(thread, cursor, parent,
2694 root_al, cpumode, ip,
2695 false, NULL, NULL, 0);
2702 static int thread__resolve_callchain_sample(struct thread *thread,
2703 struct callchain_cursor *cursor,
2704 struct evsel *evsel,
2705 struct perf_sample *sample,
2706 struct symbol **parent,
2707 struct addr_location *root_al,
2710 struct branch_stack *branch = sample->branch_stack;
2711 struct branch_entry *entries = perf_sample__branch_entries(sample);
2712 struct ip_callchain *chain = sample->callchain;
2714 u8 cpumode = PERF_RECORD_MISC_USER;
2715 int i, j, err, nr_entries;
2720 chain_nr = chain->nr;
2722 if (evsel__has_branch_callstack(evsel)) {
2723 struct perf_env *env = evsel__env(evsel);
2725 err = resolve_lbr_callchain_sample(thread, cursor, sample, parent,
2727 !env ? 0 : env->max_branches);
2729 return (err < 0) ? err : 0;
2733 * Based on DWARF debug information, some architectures skip
2734 * a callchain entry saved by the kernel.
2736 skip_idx = arch_skip_callchain_idx(thread, chain);
2739 * Add branches to call stack for easier browsing. This gives
2740 * more context for a sample than just the callers.
2742 * This uses individual histograms of paths compared to the
2743 * aggregated histograms the normal LBR mode uses.
2745 * Limitations for now:
2746 * - No extra filters
2747 * - No annotations (should annotate somehow)
2750 if (branch && callchain_param.branch_callstack) {
2751 int nr = min(max_stack, (int)branch->nr);
2752 struct branch_entry be[nr];
2753 struct iterations iter[nr];
2755 if (branch->nr > PERF_MAX_BRANCH_DEPTH) {
2756 pr_warning("corrupted branch chain. skipping...\n");
2760 for (i = 0; i < nr; i++) {
2761 if (callchain_param.order == ORDER_CALLEE) {
2768 * Check for overlap into the callchain.
2769 * The return address is one off compared to
2770 * the branch entry. To adjust for this
2771 * assume the calling instruction is not longer
2774 if (i == skip_idx ||
2775 chain->ips[first_call] >= PERF_CONTEXT_MAX)
2777 else if (be[i].from < chain->ips[first_call] &&
2778 be[i].from >= chain->ips[first_call] - 8)
2781 be[i] = entries[branch->nr - i - 1];
2784 memset(iter, 0, sizeof(struct iterations) * nr);
2785 nr = remove_loops(be, nr, iter);
2787 for (i = 0; i < nr; i++) {
2788 err = add_callchain_ip(thread, cursor, parent,
2795 err = add_callchain_ip(thread, cursor, parent, root_al,
2812 if (chain && callchain_param.order != ORDER_CALLEE) {
2813 err = find_prev_cpumode(chain, thread, cursor, parent, root_al,
2814 &cpumode, chain->nr - first_call);
2816 return (err < 0) ? err : 0;
2818 for (i = first_call, nr_entries = 0;
2819 i < chain_nr && nr_entries < max_stack; i++) {
2822 if (callchain_param.order == ORDER_CALLEE)
2825 j = chain->nr - i - 1;
2827 #ifdef HAVE_SKIP_CALLCHAIN_IDX
2832 if (ip < PERF_CONTEXT_MAX)
2834 else if (callchain_param.order != ORDER_CALLEE) {
2835 err = find_prev_cpumode(chain, thread, cursor, parent,
2836 root_al, &cpumode, j);
2838 return (err < 0) ? err : 0;
2842 err = add_callchain_ip(thread, cursor, parent,
2843 root_al, &cpumode, ip,
2844 false, NULL, NULL, 0);
2847 return (err < 0) ? err : 0;
2853 static int append_inlines(struct callchain_cursor *cursor, struct map_symbol *ms, u64 ip)
2855 struct symbol *sym = ms->sym;
2856 struct map *map = ms->map;
2857 struct inline_node *inline_node;
2858 struct inline_list *ilist;
2862 if (!symbol_conf.inline_name || !map || !sym)
2865 addr = map__map_ip(map, ip);
2866 addr = map__rip_2objdump(map, addr);
2868 inline_node = inlines__tree_find(&map->dso->inlined_nodes, addr);
2870 inline_node = dso__parse_addr_inlines(map->dso, addr, sym);
2873 inlines__tree_insert(&map->dso->inlined_nodes, inline_node);
2876 list_for_each_entry(ilist, &inline_node->val, list) {
2877 struct map_symbol ilist_ms = {
2880 .sym = ilist->symbol,
2882 ret = callchain_cursor_append(cursor, ip, &ilist_ms, false,
2883 NULL, 0, 0, 0, ilist->srcline);
2892 static int unwind_entry(struct unwind_entry *entry, void *arg)
2894 struct callchain_cursor *cursor = arg;
2895 const char *srcline = NULL;
2896 u64 addr = entry->ip;
2898 if (symbol_conf.hide_unresolved && entry->ms.sym == NULL)
2901 if (append_inlines(cursor, &entry->ms, entry->ip) == 0)
2905 * Convert entry->ip from a virtual address to an offset in
2906 * its corresponding binary.
2909 addr = map__map_ip(entry->ms.map, entry->ip);
2911 srcline = callchain_srcline(&entry->ms, addr);
2912 return callchain_cursor_append(cursor, entry->ip, &entry->ms,
2913 false, NULL, 0, 0, 0, srcline);
2916 static int thread__resolve_callchain_unwind(struct thread *thread,
2917 struct callchain_cursor *cursor,
2918 struct evsel *evsel,
2919 struct perf_sample *sample,
2922 /* Can we do dwarf post unwind? */
2923 if (!((evsel->core.attr.sample_type & PERF_SAMPLE_REGS_USER) &&
2924 (evsel->core.attr.sample_type & PERF_SAMPLE_STACK_USER)))
2927 /* Bail out if nothing was captured. */
2928 if ((!sample->user_regs.regs) ||
2929 (!sample->user_stack.size))
2932 return unwind__get_entries(unwind_entry, cursor,
2933 thread, sample, max_stack);
2936 int thread__resolve_callchain(struct thread *thread,
2937 struct callchain_cursor *cursor,
2938 struct evsel *evsel,
2939 struct perf_sample *sample,
2940 struct symbol **parent,
2941 struct addr_location *root_al,
2946 callchain_cursor_reset(cursor);
2948 if (callchain_param.order == ORDER_CALLEE) {
2949 ret = thread__resolve_callchain_sample(thread, cursor,
2955 ret = thread__resolve_callchain_unwind(thread, cursor,
2959 ret = thread__resolve_callchain_unwind(thread, cursor,
2964 ret = thread__resolve_callchain_sample(thread, cursor,
2973 int machine__for_each_thread(struct machine *machine,
2974 int (*fn)(struct thread *thread, void *p),
2977 struct threads *threads;
2979 struct thread *thread;
2983 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
2984 threads = &machine->threads[i];
2985 for (nd = rb_first_cached(&threads->entries); nd;
2987 thread = rb_entry(nd, struct thread, rb_node);
2988 rc = fn(thread, priv);
2993 list_for_each_entry(thread, &threads->dead, node) {
2994 rc = fn(thread, priv);
3002 int machines__for_each_thread(struct machines *machines,
3003 int (*fn)(struct thread *thread, void *p),
3009 rc = machine__for_each_thread(&machines->host, fn, priv);
3013 for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) {
3014 struct machine *machine = rb_entry(nd, struct machine, rb_node);
3016 rc = machine__for_each_thread(machine, fn, priv);
3023 pid_t machine__get_current_tid(struct machine *machine, int cpu)
3025 int nr_cpus = min(machine->env->nr_cpus_avail, MAX_NR_CPUS);
3027 if (cpu < 0 || cpu >= nr_cpus || !machine->current_tid)
3030 return machine->current_tid[cpu];
3033 int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid,
3036 struct thread *thread;
3037 int nr_cpus = min(machine->env->nr_cpus_avail, MAX_NR_CPUS);
3042 if (!machine->current_tid) {
3045 machine->current_tid = calloc(nr_cpus, sizeof(pid_t));
3046 if (!machine->current_tid)
3048 for (i = 0; i < nr_cpus; i++)
3049 machine->current_tid[i] = -1;
3052 if (cpu >= nr_cpus) {
3053 pr_err("Requested CPU %d too large. ", cpu);
3054 pr_err("Consider raising MAX_NR_CPUS\n");
3058 machine->current_tid[cpu] = tid;
3060 thread = machine__findnew_thread(machine, pid, tid);
3065 thread__put(thread);
3071 * Compares the raw arch string. N.B. see instead perf_env__arch() if a
3072 * normalized arch is needed.
3074 bool machine__is(struct machine *machine, const char *arch)
3076 return machine && !strcmp(perf_env__raw_arch(machine->env), arch);
3079 int machine__nr_cpus_avail(struct machine *machine)
3081 return machine ? perf_env__nr_cpus_avail(machine->env) : 0;
3084 int machine__get_kernel_start(struct machine *machine)
3086 struct map *map = machine__kernel_map(machine);
3090 * The only addresses above 2^63 are kernel addresses of a 64-bit
3091 * kernel. Note that addresses are unsigned so that on a 32-bit system
3092 * all addresses including kernel addresses are less than 2^32. In
3093 * that case (32-bit system), if the kernel mapping is unknown, all
3094 * addresses will be assumed to be in user space - see
3095 * machine__kernel_ip().
3097 machine->kernel_start = 1ULL << 63;
3099 err = map__load(map);
3101 * On x86_64, PTI entry trampolines are less than the
3102 * start of kernel text, but still above 2^63. So leave
3103 * kernel_start = 1ULL << 63 for x86_64.
3105 if (!err && !machine__is(machine, "x86_64"))
3106 machine->kernel_start = map->start;
3111 u8 machine__addr_cpumode(struct machine *machine, u8 cpumode, u64 addr)
3113 u8 addr_cpumode = cpumode;
3116 if (!machine->single_address_space)
3119 kernel_ip = machine__kernel_ip(machine, addr);
3121 case PERF_RECORD_MISC_KERNEL:
3122 case PERF_RECORD_MISC_USER:
3123 addr_cpumode = kernel_ip ? PERF_RECORD_MISC_KERNEL :
3124 PERF_RECORD_MISC_USER;
3126 case PERF_RECORD_MISC_GUEST_KERNEL:
3127 case PERF_RECORD_MISC_GUEST_USER:
3128 addr_cpumode = kernel_ip ? PERF_RECORD_MISC_GUEST_KERNEL :
3129 PERF_RECORD_MISC_GUEST_USER;
3135 return addr_cpumode;
3138 struct dso *machine__findnew_dso_id(struct machine *machine, const char *filename, struct dso_id *id)
3140 return dsos__findnew_id(&machine->dsos, filename, id);
3143 struct dso *machine__findnew_dso(struct machine *machine, const char *filename)
3145 return machine__findnew_dso_id(machine, filename, NULL);
3148 char *machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
3150 struct machine *machine = vmachine;
3152 struct symbol *sym = machine__find_kernel_symbol(machine, *addrp, &map);
3157 *modp = __map__is_kmodule(map) ? (char *)map->dso->short_name : NULL;
3158 *addrp = map->unmap_ip(map, sym->start);
3162 int machine__for_each_dso(struct machine *machine, machine__dso_t fn, void *priv)
3167 list_for_each_entry(pos, &machine->dsos.head, node) {
3168 if (fn(pos, machine, priv))