17 #include <linux/string.h>
20 static void __maps__insert(struct maps *maps, struct map *map);
22 const char *map_type__name[MAP__NR_TYPES] = {
23 [MAP__FUNCTION] = "Functions",
24 [MAP__VARIABLE] = "Variables",
27 static inline int is_anon_memory(const char *filename)
29 return !strcmp(filename, "//anon") ||
30 !strncmp(filename, "/dev/zero", sizeof("/dev/zero") - 1) ||
31 !strncmp(filename, "/anon_hugepage", sizeof("/anon_hugepage") - 1);
34 static inline int is_no_dso_memory(const char *filename)
36 return !strncmp(filename, "[stack", 6) ||
37 !strncmp(filename, "/SYSV",5) ||
38 !strcmp(filename, "[heap]");
41 static inline int is_android_lib(const char *filename)
43 return !strncmp(filename, "/data/app-lib", 13) ||
44 !strncmp(filename, "/system/lib", 11);
47 static inline bool replace_android_lib(const char *filename, char *newfilename)
51 size_t app_abi_length, new_length;
52 size_t lib_length = 0;
54 libname = strrchr(filename, '/');
56 lib_length = strlen(libname);
58 app_abi = getenv("APP_ABI");
62 app_abi_length = strlen(app_abi);
64 if (!strncmp(filename, "/data/app-lib", 13)) {
70 new_length = 7 + app_abi_length + lib_length;
72 apk_path = getenv("APK_PATH");
74 new_length += strlen(apk_path) + 1;
75 if (new_length > PATH_MAX)
77 snprintf(newfilename, new_length,
78 "%s/libs/%s/%s", apk_path, app_abi, libname);
80 if (new_length > PATH_MAX)
82 snprintf(newfilename, new_length,
83 "libs/%s/%s", app_abi, libname);
88 if (!strncmp(filename, "/system/lib/", 11)) {
94 ndk = getenv("NDK_ROOT");
95 app = getenv("APP_PLATFORM");
100 ndk_length = strlen(ndk);
101 app_length = strlen(app);
103 if (!(ndk_length && app_length && app_abi_length))
106 arch = !strncmp(app_abi, "arm", 3) ? "arm" :
107 !strncmp(app_abi, "mips", 4) ? "mips" :
108 !strncmp(app_abi, "x86", 3) ? "x86" : NULL;
113 new_length = 27 + ndk_length +
114 app_length + lib_length
117 if (new_length > PATH_MAX)
119 snprintf(newfilename, new_length,
120 "%s/platforms/%s/arch-%s/usr/lib/%s",
121 ndk, app, arch, libname);
128 void map__init(struct map *map, enum map_type type,
129 u64 start, u64 end, u64 pgoff, struct dso *dso)
136 map->dso = dso__get(dso);
137 map->map_ip = map__map_ip;
138 map->unmap_ip = map__unmap_ip;
139 RB_CLEAR_NODE(&map->rb_node);
141 map->erange_warned = false;
142 atomic_set(&map->refcnt, 1);
145 struct map *map__new(struct machine *machine, u64 start, u64 len,
146 u64 pgoff, u32 pid, u32 d_maj, u32 d_min, u64 ino,
147 u64 ino_gen, u32 prot, u32 flags, char *filename,
148 enum map_type type, struct thread *thread)
150 struct map *map = malloc(sizeof(*map));
153 char newfilename[PATH_MAX];
155 int anon, no_dso, vdso, android;
157 android = is_android_lib(filename);
158 anon = is_anon_memory(filename);
159 vdso = is_vdso_map(filename);
160 no_dso = is_no_dso_memory(filename);
165 map->ino_generation = ino_gen;
169 if ((anon || no_dso) && type == MAP__FUNCTION) {
170 snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", pid);
171 filename = newfilename;
175 if (replace_android_lib(filename, newfilename))
176 filename = newfilename;
181 dso = machine__findnew_vdso(machine, thread);
183 dso = machine__findnew_dso(machine, filename);
188 map__init(map, type, start, start + len, pgoff, dso);
190 if (anon || no_dso) {
191 map->map_ip = map->unmap_ip = identity__map_ip;
194 * Set memory without DSO as loaded. All map__find_*
195 * functions still return NULL, and we avoid the
196 * unnecessary map__load warning.
198 if (type != MAP__FUNCTION)
199 dso__set_loaded(dso, map->type);
210 * Constructor variant for modules (where we know from /proc/modules where
211 * they are loaded) and for vmlinux, where only after we load all the
212 * symbols we'll know where it starts and ends.
214 struct map *map__new2(u64 start, struct dso *dso, enum map_type type)
216 struct map *map = calloc(1, (sizeof(*map) +
217 (dso->kernel ? sizeof(struct kmap) : 0)));
220 * ->end will be filled after we load all the symbols
222 map__init(map, type, start, 0, 0, dso);
229 * Use this and __map__is_kmodule() for map instances that are in
230 * machine->kmaps, and thus have map->groups->machine all properly set, to
231 * disambiguate between the kernel and modules.
233 * When the need arises, introduce map__is_{kernel,kmodule)() that
234 * checks (map->groups != NULL && map->groups->machine != NULL &&
235 * map->dso->kernel) before calling __map__is_{kernel,kmodule}())
237 bool __map__is_kernel(const struct map *map)
239 return __machine__kernel_map(map->groups->machine, map->type) == map;
242 static void map__exit(struct map *map)
244 BUG_ON(!RB_EMPTY_NODE(&map->rb_node));
248 void map__delete(struct map *map)
254 void map__put(struct map *map)
256 if (map && atomic_dec_and_test(&map->refcnt))
260 void map__fixup_start(struct map *map)
262 struct rb_root *symbols = &map->dso->symbols[map->type];
263 struct rb_node *nd = rb_first(symbols);
265 struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
266 map->start = sym->start;
270 void map__fixup_end(struct map *map)
272 struct rb_root *symbols = &map->dso->symbols[map->type];
273 struct rb_node *nd = rb_last(symbols);
275 struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
280 #define DSO__DELETED "(deleted)"
282 int map__load(struct map *map, symbol_filter_t filter)
284 const char *name = map->dso->long_name;
287 if (dso__loaded(map->dso, map->type))
290 nr = dso__load(map->dso, map, filter);
292 if (map->dso->has_build_id) {
293 char sbuild_id[SBUILD_ID_SIZE];
295 build_id__sprintf(map->dso->build_id,
296 sizeof(map->dso->build_id),
298 pr_warning("%s with build id %s not found",
301 pr_warning("Failed to open %s", name);
303 pr_warning(", continuing without symbols\n");
305 } else if (nr == 0) {
306 #ifdef HAVE_LIBELF_SUPPORT
307 const size_t len = strlen(name);
308 const size_t real_len = len - sizeof(DSO__DELETED);
310 if (len > sizeof(DSO__DELETED) &&
311 strcmp(name + real_len + 1, DSO__DELETED) == 0) {
312 pr_warning("%.*s was updated (is prelink enabled?). "
313 "Restart the long running apps that use it!\n",
314 (int)real_len, name);
316 pr_warning("no symbols passed the given filter.\n");
317 return -2; /* Empty but maybe by the filter */
319 pr_warning("no symbols found in %s, maybe install "
320 "a debug package?\n", name);
329 int __weak arch__compare_symbol_names(const char *namea, const char *nameb)
331 return strcmp(namea, nameb);
334 struct symbol *map__find_symbol(struct map *map, u64 addr,
335 symbol_filter_t filter)
337 if (map__load(map, filter) < 0)
340 return dso__find_symbol(map->dso, map->type, addr);
343 struct symbol *map__find_symbol_by_name(struct map *map, const char *name,
344 symbol_filter_t filter)
346 if (map__load(map, filter) < 0)
349 if (!dso__sorted_by_name(map->dso, map->type))
350 dso__sort_by_name(map->dso, map->type);
352 return dso__find_symbol_by_name(map->dso, map->type, name);
355 struct map *map__clone(struct map *from)
357 struct map *map = memdup(from, sizeof(*map));
360 atomic_set(&map->refcnt, 1);
361 RB_CLEAR_NODE(&map->rb_node);
369 int map__overlap(struct map *l, struct map *r)
371 if (l->start > r->start) {
377 if (l->end > r->start)
383 size_t map__fprintf(struct map *map, FILE *fp)
385 return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %" PRIx64 " %s\n",
386 map->start, map->end, map->pgoff, map->dso->name);
389 size_t map__fprintf_dsoname(struct map *map, FILE *fp)
391 const char *dsoname = "[unknown]";
393 if (map && map->dso && (map->dso->name || map->dso->long_name)) {
394 if (symbol_conf.show_kernel_path && map->dso->long_name)
395 dsoname = map->dso->long_name;
396 else if (map->dso->name)
397 dsoname = map->dso->name;
400 return fprintf(fp, "%s", dsoname);
403 int map__fprintf_srcline(struct map *map, u64 addr, const char *prefix,
409 if (map && map->dso) {
410 srcline = get_srcline(map->dso,
411 map__rip_2objdump(map, addr), NULL, true);
412 if (srcline != SRCLINE_UNKNOWN)
413 ret = fprintf(fp, "%s%s", prefix, srcline);
414 free_srcline(srcline);
420 * map__rip_2objdump - convert symbol start address to objdump address.
422 * @rip: symbol start address
424 * objdump wants/reports absolute IPs for ET_EXEC, and RIPs for ET_DYN.
425 * map->dso->adjust_symbols==1 for ET_EXEC-like cases except ET_REL which is
426 * relative to section start.
428 * Return: Address suitable for passing to "objdump --start-address="
430 u64 map__rip_2objdump(struct map *map, u64 rip)
432 if (!map->dso->adjust_symbols)
436 return rip - map->pgoff;
439 * kernel modules also have DSO_TYPE_USER in dso->kernel,
440 * but all kernel modules are ET_REL, so won't get here.
442 if (map->dso->kernel == DSO_TYPE_USER)
443 return rip + map->dso->text_offset;
445 return map->unmap_ip(map, rip) - map->reloc;
449 * map__objdump_2mem - convert objdump address to a memory address.
451 * @ip: objdump address
453 * Closely related to map__rip_2objdump(), this function takes an address from
454 * objdump and converts it to a memory address. Note this assumes that @map
455 * contains the address. To be sure the result is valid, check it forwards
456 * e.g. map__rip_2objdump(map->map_ip(map, map__objdump_2mem(map, ip))) == ip
458 * Return: Memory address.
460 u64 map__objdump_2mem(struct map *map, u64 ip)
462 if (!map->dso->adjust_symbols)
463 return map->unmap_ip(map, ip);
466 return map->unmap_ip(map, ip + map->pgoff);
469 * kernel modules also have DSO_TYPE_USER in dso->kernel,
470 * but all kernel modules are ET_REL, so won't get here.
472 if (map->dso->kernel == DSO_TYPE_USER)
473 return map->unmap_ip(map, ip - map->dso->text_offset);
475 return ip + map->reloc;
478 static void maps__init(struct maps *maps)
480 maps->entries = RB_ROOT;
481 pthread_rwlock_init(&maps->lock, NULL);
484 void map_groups__init(struct map_groups *mg, struct machine *machine)
487 for (i = 0; i < MAP__NR_TYPES; ++i) {
488 maps__init(&mg->maps[i]);
490 mg->machine = machine;
491 atomic_set(&mg->refcnt, 1);
494 static void __maps__purge(struct maps *maps)
496 struct rb_root *root = &maps->entries;
497 struct rb_node *next = rb_first(root);
500 struct map *pos = rb_entry(next, struct map, rb_node);
502 next = rb_next(&pos->rb_node);
503 rb_erase_init(&pos->rb_node, root);
508 static void maps__exit(struct maps *maps)
510 pthread_rwlock_wrlock(&maps->lock);
512 pthread_rwlock_unlock(&maps->lock);
515 void map_groups__exit(struct map_groups *mg)
519 for (i = 0; i < MAP__NR_TYPES; ++i)
520 maps__exit(&mg->maps[i]);
523 bool map_groups__empty(struct map_groups *mg)
527 for (i = 0; i < MAP__NR_TYPES; ++i) {
528 if (maps__first(&mg->maps[i]))
535 struct map_groups *map_groups__new(struct machine *machine)
537 struct map_groups *mg = malloc(sizeof(*mg));
540 map_groups__init(mg, machine);
545 void map_groups__delete(struct map_groups *mg)
547 map_groups__exit(mg);
551 void map_groups__put(struct map_groups *mg)
553 if (mg && atomic_dec_and_test(&mg->refcnt))
554 map_groups__delete(mg);
557 struct symbol *map_groups__find_symbol(struct map_groups *mg,
558 enum map_type type, u64 addr,
560 symbol_filter_t filter)
562 struct map *map = map_groups__find(mg, type, addr);
564 /* Ensure map is loaded before using map->map_ip */
565 if (map != NULL && map__load(map, filter) >= 0) {
568 return map__find_symbol(map, map->map_ip(map, addr), filter);
574 struct symbol *maps__find_symbol_by_name(struct maps *maps, const char *name,
575 struct map **mapp, symbol_filter_t filter)
580 pthread_rwlock_rdlock(&maps->lock);
582 for (nd = rb_first(&maps->entries); nd; nd = rb_next(nd)) {
583 struct map *pos = rb_entry(nd, struct map, rb_node);
585 sym = map__find_symbol_by_name(pos, name, filter);
596 pthread_rwlock_unlock(&maps->lock);
600 struct symbol *map_groups__find_symbol_by_name(struct map_groups *mg,
604 symbol_filter_t filter)
606 struct symbol *sym = maps__find_symbol_by_name(&mg->maps[type], name, mapp, filter);
611 int map_groups__find_ams(struct addr_map_symbol *ams, symbol_filter_t filter)
613 if (ams->addr < ams->map->start || ams->addr >= ams->map->end) {
614 if (ams->map->groups == NULL)
616 ams->map = map_groups__find(ams->map->groups, ams->map->type,
618 if (ams->map == NULL)
622 ams->al_addr = ams->map->map_ip(ams->map, ams->addr);
623 ams->sym = map__find_symbol(ams->map, ams->al_addr, filter);
625 return ams->sym ? 0 : -1;
628 static size_t maps__fprintf(struct maps *maps, FILE *fp)
633 pthread_rwlock_rdlock(&maps->lock);
635 for (nd = rb_first(&maps->entries); nd; nd = rb_next(nd)) {
636 struct map *pos = rb_entry(nd, struct map, rb_node);
637 printed += fprintf(fp, "Map:");
638 printed += map__fprintf(pos, fp);
640 printed += dso__fprintf(pos->dso, pos->type, fp);
641 printed += fprintf(fp, "--\n");
645 pthread_rwlock_unlock(&maps->lock);
650 size_t __map_groups__fprintf_maps(struct map_groups *mg, enum map_type type,
653 size_t printed = fprintf(fp, "%s:\n", map_type__name[type]);
654 return printed += maps__fprintf(&mg->maps[type], fp);
657 size_t map_groups__fprintf(struct map_groups *mg, FILE *fp)
659 size_t printed = 0, i;
660 for (i = 0; i < MAP__NR_TYPES; ++i)
661 printed += __map_groups__fprintf_maps(mg, i, fp);
665 static void __map_groups__insert(struct map_groups *mg, struct map *map)
667 __maps__insert(&mg->maps[map->type], map);
671 static int maps__fixup_overlappings(struct maps *maps, struct map *map, FILE *fp)
673 struct rb_root *root;
674 struct rb_node *next;
677 pthread_rwlock_wrlock(&maps->lock);
679 root = &maps->entries;
680 next = rb_first(root);
683 struct map *pos = rb_entry(next, struct map, rb_node);
684 next = rb_next(&pos->rb_node);
686 if (!map__overlap(pos, map))
690 fputs("overlapping maps:\n", fp);
691 map__fprintf(map, fp);
692 map__fprintf(pos, fp);
695 rb_erase_init(&pos->rb_node, root);
697 * Now check if we need to create new maps for areas not
698 * overlapped by the new map:
700 if (map->start > pos->start) {
701 struct map *before = map__clone(pos);
703 if (before == NULL) {
708 before->end = map->start;
709 __map_groups__insert(pos->groups, before);
711 map__fprintf(before, fp);
715 if (map->end < pos->end) {
716 struct map *after = map__clone(pos);
723 after->start = map->end;
724 __map_groups__insert(pos->groups, after);
726 map__fprintf(after, fp);
738 pthread_rwlock_unlock(&maps->lock);
742 int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map,
745 return maps__fixup_overlappings(&mg->maps[map->type], map, fp);
749 * XXX This should not really _copy_ te maps, but refcount them.
751 int map_groups__clone(struct thread *thread,
752 struct map_groups *parent, enum map_type type)
754 struct map_groups *mg = thread->mg;
757 struct maps *maps = &parent->maps[type];
759 pthread_rwlock_rdlock(&maps->lock);
761 for (map = maps__first(maps); map; map = map__next(map)) {
762 struct map *new = map__clone(map);
766 err = unwind__prepare_access(thread, new, NULL);
770 map_groups__insert(mg, new);
776 pthread_rwlock_unlock(&maps->lock);
780 static void __maps__insert(struct maps *maps, struct map *map)
782 struct rb_node **p = &maps->entries.rb_node;
783 struct rb_node *parent = NULL;
784 const u64 ip = map->start;
789 m = rb_entry(parent, struct map, rb_node);
796 rb_link_node(&map->rb_node, parent, p);
797 rb_insert_color(&map->rb_node, &maps->entries);
801 void maps__insert(struct maps *maps, struct map *map)
803 pthread_rwlock_wrlock(&maps->lock);
804 __maps__insert(maps, map);
805 pthread_rwlock_unlock(&maps->lock);
808 static void __maps__remove(struct maps *maps, struct map *map)
810 rb_erase_init(&map->rb_node, &maps->entries);
814 void maps__remove(struct maps *maps, struct map *map)
816 pthread_rwlock_wrlock(&maps->lock);
817 __maps__remove(maps, map);
818 pthread_rwlock_unlock(&maps->lock);
821 struct map *maps__find(struct maps *maps, u64 ip)
823 struct rb_node **p, *parent = NULL;
826 pthread_rwlock_rdlock(&maps->lock);
828 p = &maps->entries.rb_node;
831 m = rb_entry(parent, struct map, rb_node);
834 else if (ip >= m->end)
842 pthread_rwlock_unlock(&maps->lock);
846 struct map *maps__first(struct maps *maps)
848 struct rb_node *first = rb_first(&maps->entries);
851 return rb_entry(first, struct map, rb_node);
855 struct map *map__next(struct map *map)
857 struct rb_node *next = rb_next(&map->rb_node);
860 return rb_entry(next, struct map, rb_node);
864 struct kmap *map__kmap(struct map *map)
866 if (!map->dso || !map->dso->kernel) {
867 pr_err("Internal error: map__kmap with a non-kernel map\n");
870 return (struct kmap *)(map + 1);
873 struct map_groups *map__kmaps(struct map *map)
875 struct kmap *kmap = map__kmap(map);
877 if (!kmap || !kmap->kmaps) {
878 pr_err("Internal error: map__kmaps with a non-kernel map\n");