17 #include <linux/string.h>
19 static void __maps__insert(struct maps *maps, struct map *map);
21 const char *map_type__name[MAP__NR_TYPES] = {
22 [MAP__FUNCTION] = "Functions",
23 [MAP__VARIABLE] = "Variables",
26 static inline int is_anon_memory(const char *filename)
28 return !strcmp(filename, "//anon") ||
29 !strcmp(filename, "/dev/zero (deleted)") ||
30 !strcmp(filename, "/anon_hugepage (deleted)");
33 static inline int is_no_dso_memory(const char *filename)
35 return !strncmp(filename, "[stack", 6) ||
36 !strncmp(filename, "/SYSV",5) ||
37 !strcmp(filename, "[heap]");
40 static inline int is_android_lib(const char *filename)
42 return !strncmp(filename, "/data/app-lib", 13) ||
43 !strncmp(filename, "/system/lib", 11);
46 static inline bool replace_android_lib(const char *filename, char *newfilename)
50 size_t app_abi_length, new_length;
51 size_t lib_length = 0;
53 libname = strrchr(filename, '/');
55 lib_length = strlen(libname);
57 app_abi = getenv("APP_ABI");
61 app_abi_length = strlen(app_abi);
63 if (!strncmp(filename, "/data/app-lib", 13)) {
69 new_length = 7 + app_abi_length + lib_length;
71 apk_path = getenv("APK_PATH");
73 new_length += strlen(apk_path) + 1;
74 if (new_length > PATH_MAX)
76 snprintf(newfilename, new_length,
77 "%s/libs/%s/%s", apk_path, app_abi, libname);
79 if (new_length > PATH_MAX)
81 snprintf(newfilename, new_length,
82 "libs/%s/%s", app_abi, libname);
87 if (!strncmp(filename, "/system/lib/", 11)) {
93 ndk = getenv("NDK_ROOT");
94 app = getenv("APP_PLATFORM");
99 ndk_length = strlen(ndk);
100 app_length = strlen(app);
102 if (!(ndk_length && app_length && app_abi_length))
105 arch = !strncmp(app_abi, "arm", 3) ? "arm" :
106 !strncmp(app_abi, "mips", 4) ? "mips" :
107 !strncmp(app_abi, "x86", 3) ? "x86" : NULL;
112 new_length = 27 + ndk_length +
113 app_length + lib_length
116 if (new_length > PATH_MAX)
118 snprintf(newfilename, new_length,
119 "%s/platforms/%s/arch-%s/usr/lib/%s",
120 ndk, app, arch, libname);
127 void map__init(struct map *map, enum map_type type,
128 u64 start, u64 end, u64 pgoff, struct dso *dso)
135 map->dso = dso__get(dso);
136 map->map_ip = map__map_ip;
137 map->unmap_ip = map__unmap_ip;
138 RB_CLEAR_NODE(&map->rb_node);
140 map->erange_warned = false;
141 atomic_set(&map->refcnt, 1);
144 struct map *map__new(struct machine *machine, u64 start, u64 len,
145 u64 pgoff, u32 pid, u32 d_maj, u32 d_min, u64 ino,
146 u64 ino_gen, u32 prot, u32 flags, char *filename,
147 enum map_type type, struct thread *thread)
149 struct map *map = malloc(sizeof(*map));
152 char newfilename[PATH_MAX];
154 int anon, no_dso, vdso, android;
156 android = is_android_lib(filename);
157 anon = is_anon_memory(filename);
158 vdso = is_vdso_map(filename);
159 no_dso = is_no_dso_memory(filename);
164 map->ino_generation = ino_gen;
168 if ((anon || no_dso) && type == MAP__FUNCTION) {
169 snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", pid);
170 filename = newfilename;
174 if (replace_android_lib(filename, newfilename))
175 filename = newfilename;
180 dso = machine__findnew_vdso(machine, thread);
182 dso = machine__findnew_dso(machine, filename);
187 map__init(map, type, start, start + len, pgoff, dso);
189 if (anon || no_dso) {
190 map->map_ip = map->unmap_ip = identity__map_ip;
193 * Set memory without DSO as loaded. All map__find_*
194 * functions still return NULL, and we avoid the
195 * unnecessary map__load warning.
197 if (type != MAP__FUNCTION)
198 dso__set_loaded(dso, map->type);
209 * Constructor variant for modules (where we know from /proc/modules where
210 * they are loaded) and for vmlinux, where only after we load all the
211 * symbols we'll know where it starts and ends.
213 struct map *map__new2(u64 start, struct dso *dso, enum map_type type)
215 struct map *map = calloc(1, (sizeof(*map) +
216 (dso->kernel ? sizeof(struct kmap) : 0)));
219 * ->end will be filled after we load all the symbols
221 map__init(map, type, start, 0, 0, dso);
227 static void map__exit(struct map *map)
229 BUG_ON(!RB_EMPTY_NODE(&map->rb_node));
233 void map__delete(struct map *map)
239 void map__put(struct map *map)
241 if (map && atomic_dec_and_test(&map->refcnt))
245 void map__fixup_start(struct map *map)
247 struct rb_root *symbols = &map->dso->symbols[map->type];
248 struct rb_node *nd = rb_first(symbols);
250 struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
251 map->start = sym->start;
255 void map__fixup_end(struct map *map)
257 struct rb_root *symbols = &map->dso->symbols[map->type];
258 struct rb_node *nd = rb_last(symbols);
260 struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
265 #define DSO__DELETED "(deleted)"
267 int map__load(struct map *map, symbol_filter_t filter)
269 const char *name = map->dso->long_name;
272 if (dso__loaded(map->dso, map->type))
275 nr = dso__load(map->dso, map, filter);
277 if (map->dso->has_build_id) {
278 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
280 build_id__sprintf(map->dso->build_id,
281 sizeof(map->dso->build_id),
283 pr_warning("%s with build id %s not found",
286 pr_warning("Failed to open %s", name);
288 pr_warning(", continuing without symbols\n");
290 } else if (nr == 0) {
291 #ifdef HAVE_LIBELF_SUPPORT
292 const size_t len = strlen(name);
293 const size_t real_len = len - sizeof(DSO__DELETED);
295 if (len > sizeof(DSO__DELETED) &&
296 strcmp(name + real_len + 1, DSO__DELETED) == 0) {
297 pr_warning("%.*s was updated (is prelink enabled?). "
298 "Restart the long running apps that use it!\n",
299 (int)real_len, name);
301 pr_warning("no symbols found in %s, maybe install "
302 "a debug package?\n", name);
311 int __weak arch__compare_symbol_names(const char *namea, const char *nameb)
313 return strcmp(namea, nameb);
316 struct symbol *map__find_symbol(struct map *map, u64 addr,
317 symbol_filter_t filter)
319 if (map__load(map, filter) < 0)
322 return dso__find_symbol(map->dso, map->type, addr);
325 struct symbol *map__find_symbol_by_name(struct map *map, const char *name,
326 symbol_filter_t filter)
328 if (map__load(map, filter) < 0)
331 if (!dso__sorted_by_name(map->dso, map->type))
332 dso__sort_by_name(map->dso, map->type);
334 return dso__find_symbol_by_name(map->dso, map->type, name);
337 struct map *map__clone(struct map *map)
339 return memdup(map, sizeof(*map));
342 int map__overlap(struct map *l, struct map *r)
344 if (l->start > r->start) {
350 if (l->end > r->start)
356 size_t map__fprintf(struct map *map, FILE *fp)
358 return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %" PRIx64 " %s\n",
359 map->start, map->end, map->pgoff, map->dso->name);
362 size_t map__fprintf_dsoname(struct map *map, FILE *fp)
364 const char *dsoname = "[unknown]";
366 if (map && map->dso && (map->dso->name || map->dso->long_name)) {
367 if (symbol_conf.show_kernel_path && map->dso->long_name)
368 dsoname = map->dso->long_name;
369 else if (map->dso->name)
370 dsoname = map->dso->name;
373 return fprintf(fp, "%s", dsoname);
376 int map__fprintf_srcline(struct map *map, u64 addr, const char *prefix,
382 if (map && map->dso) {
383 srcline = get_srcline(map->dso,
384 map__rip_2objdump(map, addr), NULL, true);
385 if (srcline != SRCLINE_UNKNOWN)
386 ret = fprintf(fp, "%s%s", prefix, srcline);
387 free_srcline(srcline);
393 * map__rip_2objdump - convert symbol start address to objdump address.
395 * @rip: symbol start address
397 * objdump wants/reports absolute IPs for ET_EXEC, and RIPs for ET_DYN.
398 * map->dso->adjust_symbols==1 for ET_EXEC-like cases except ET_REL which is
399 * relative to section start.
401 * Return: Address suitable for passing to "objdump --start-address="
403 u64 map__rip_2objdump(struct map *map, u64 rip)
405 if (!map->dso->adjust_symbols)
409 return rip - map->pgoff;
411 return map->unmap_ip(map, rip) - map->reloc;
415 * map__objdump_2mem - convert objdump address to a memory address.
417 * @ip: objdump address
419 * Closely related to map__rip_2objdump(), this function takes an address from
420 * objdump and converts it to a memory address. Note this assumes that @map
421 * contains the address. To be sure the result is valid, check it forwards
422 * e.g. map__rip_2objdump(map->map_ip(map, map__objdump_2mem(map, ip))) == ip
424 * Return: Memory address.
426 u64 map__objdump_2mem(struct map *map, u64 ip)
428 if (!map->dso->adjust_symbols)
429 return map->unmap_ip(map, ip);
432 return map->unmap_ip(map, ip + map->pgoff);
434 return ip + map->reloc;
437 static void maps__init(struct maps *maps)
439 maps->entries = RB_ROOT;
440 pthread_rwlock_init(&maps->lock, NULL);
443 void map_groups__init(struct map_groups *mg, struct machine *machine)
446 for (i = 0; i < MAP__NR_TYPES; ++i) {
447 maps__init(&mg->maps[i]);
449 mg->machine = machine;
450 atomic_set(&mg->refcnt, 1);
453 static void __maps__purge(struct maps *maps)
455 struct rb_root *root = &maps->entries;
456 struct rb_node *next = rb_first(root);
459 struct map *pos = rb_entry(next, struct map, rb_node);
461 next = rb_next(&pos->rb_node);
462 rb_erase_init(&pos->rb_node, root);
467 static void maps__exit(struct maps *maps)
469 pthread_rwlock_wrlock(&maps->lock);
471 pthread_rwlock_unlock(&maps->lock);
474 void map_groups__exit(struct map_groups *mg)
478 for (i = 0; i < MAP__NR_TYPES; ++i)
479 maps__exit(&mg->maps[i]);
482 bool map_groups__empty(struct map_groups *mg)
486 for (i = 0; i < MAP__NR_TYPES; ++i) {
487 if (maps__first(&mg->maps[i]))
494 struct map_groups *map_groups__new(struct machine *machine)
496 struct map_groups *mg = malloc(sizeof(*mg));
499 map_groups__init(mg, machine);
504 void map_groups__delete(struct map_groups *mg)
506 map_groups__exit(mg);
510 void map_groups__put(struct map_groups *mg)
512 if (mg && atomic_dec_and_test(&mg->refcnt))
513 map_groups__delete(mg);
516 struct symbol *map_groups__find_symbol(struct map_groups *mg,
517 enum map_type type, u64 addr,
519 symbol_filter_t filter)
521 struct map *map = map_groups__find(mg, type, addr);
523 /* Ensure map is loaded before using map->map_ip */
524 if (map != NULL && map__load(map, filter) >= 0) {
527 return map__find_symbol(map, map->map_ip(map, addr), filter);
533 struct symbol *map_groups__find_symbol_by_name(struct map_groups *mg,
537 symbol_filter_t filter)
539 struct maps *maps = &mg->maps[type];
543 pthread_rwlock_rdlock(&maps->lock);
545 for (nd = rb_first(&maps->entries); nd; nd = rb_next(nd)) {
546 struct map *pos = rb_entry(nd, struct map, rb_node);
548 sym = map__find_symbol_by_name(pos, name, filter);
559 pthread_rwlock_unlock(&maps->lock);
563 int map_groups__find_ams(struct addr_map_symbol *ams, symbol_filter_t filter)
565 if (ams->addr < ams->map->start || ams->addr >= ams->map->end) {
566 if (ams->map->groups == NULL)
568 ams->map = map_groups__find(ams->map->groups, ams->map->type,
570 if (ams->map == NULL)
574 ams->al_addr = ams->map->map_ip(ams->map, ams->addr);
575 ams->sym = map__find_symbol(ams->map, ams->al_addr, filter);
577 return ams->sym ? 0 : -1;
580 static size_t maps__fprintf(struct maps *maps, FILE *fp)
585 pthread_rwlock_rdlock(&maps->lock);
587 for (nd = rb_first(&maps->entries); nd; nd = rb_next(nd)) {
588 struct map *pos = rb_entry(nd, struct map, rb_node);
589 printed += fprintf(fp, "Map:");
590 printed += map__fprintf(pos, fp);
592 printed += dso__fprintf(pos->dso, pos->type, fp);
593 printed += fprintf(fp, "--\n");
597 pthread_rwlock_unlock(&maps->lock);
602 size_t __map_groups__fprintf_maps(struct map_groups *mg, enum map_type type,
605 size_t printed = fprintf(fp, "%s:\n", map_type__name[type]);
606 return printed += maps__fprintf(&mg->maps[type], fp);
609 size_t map_groups__fprintf(struct map_groups *mg, FILE *fp)
611 size_t printed = 0, i;
612 for (i = 0; i < MAP__NR_TYPES; ++i)
613 printed += __map_groups__fprintf_maps(mg, i, fp);
617 static int maps__fixup_overlappings(struct maps *maps, struct map *map, FILE *fp)
619 struct rb_root *root;
620 struct rb_node *next;
623 pthread_rwlock_wrlock(&maps->lock);
625 root = &maps->entries;
626 next = rb_first(root);
629 struct map *pos = rb_entry(next, struct map, rb_node);
630 next = rb_next(&pos->rb_node);
632 if (!map__overlap(pos, map))
636 fputs("overlapping maps:\n", fp);
637 map__fprintf(map, fp);
638 map__fprintf(pos, fp);
641 rb_erase_init(&pos->rb_node, root);
643 * Now check if we need to create new maps for areas not
644 * overlapped by the new map:
646 if (map->start > pos->start) {
647 struct map *before = map__clone(pos);
649 if (before == NULL) {
654 before->end = map->start;
655 __maps__insert(maps, before);
657 map__fprintf(before, fp);
660 if (map->end < pos->end) {
661 struct map *after = map__clone(pos);
668 after->start = map->end;
669 __maps__insert(maps, after);
671 map__fprintf(after, fp);
682 pthread_rwlock_unlock(&maps->lock);
686 int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map,
689 return maps__fixup_overlappings(&mg->maps[map->type], map, fp);
693 * XXX This should not really _copy_ te maps, but refcount them.
695 int map_groups__clone(struct map_groups *mg,
696 struct map_groups *parent, enum map_type type)
700 struct maps *maps = &parent->maps[type];
702 pthread_rwlock_rdlock(&maps->lock);
704 for (map = maps__first(maps); map; map = map__next(map)) {
705 struct map *new = map__clone(map);
708 map_groups__insert(mg, new);
713 pthread_rwlock_unlock(&maps->lock);
717 static void __maps__insert(struct maps *maps, struct map *map)
719 struct rb_node **p = &maps->entries.rb_node;
720 struct rb_node *parent = NULL;
721 const u64 ip = map->start;
726 m = rb_entry(parent, struct map, rb_node);
733 rb_link_node(&map->rb_node, parent, p);
734 rb_insert_color(&map->rb_node, &maps->entries);
738 void maps__insert(struct maps *maps, struct map *map)
740 pthread_rwlock_wrlock(&maps->lock);
741 __maps__insert(maps, map);
742 pthread_rwlock_unlock(&maps->lock);
745 static void __maps__remove(struct maps *maps, struct map *map)
747 rb_erase_init(&map->rb_node, &maps->entries);
751 void maps__remove(struct maps *maps, struct map *map)
753 pthread_rwlock_wrlock(&maps->lock);
754 __maps__remove(maps, map);
755 pthread_rwlock_unlock(&maps->lock);
758 struct map *maps__find(struct maps *maps, u64 ip)
760 struct rb_node **p, *parent = NULL;
763 pthread_rwlock_rdlock(&maps->lock);
765 p = &maps->entries.rb_node;
768 m = rb_entry(parent, struct map, rb_node);
771 else if (ip >= m->end)
779 pthread_rwlock_unlock(&maps->lock);
783 struct map *maps__first(struct maps *maps)
785 struct rb_node *first = rb_first(&maps->entries);
788 return rb_entry(first, struct map, rb_node);
792 struct map *map__next(struct map *map)
794 struct rb_node *next = rb_next(&map->rb_node);
797 return rb_entry(next, struct map, rb_node);
801 struct kmap *map__kmap(struct map *map)
803 if (!map->dso || !map->dso->kernel) {
804 pr_err("Internal error: map__kmap with a non-kernel map\n");
807 return (struct kmap *)(map + 1);
810 struct map_groups *map__kmaps(struct map *map)
812 struct kmap *kmap = map__kmap(map);
814 if (!kmap || !kmap->kmaps) {
815 pr_err("Internal error: map__kmaps with a non-kernel map\n");