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 found in %s, maybe install "
317 "a debug package?\n", name);
326 int __weak arch__compare_symbol_names(const char *namea, const char *nameb)
328 return strcmp(namea, nameb);
331 struct symbol *map__find_symbol(struct map *map, u64 addr,
332 symbol_filter_t filter)
334 if (map__load(map, filter) < 0)
337 return dso__find_symbol(map->dso, map->type, addr);
340 struct symbol *map__find_symbol_by_name(struct map *map, const char *name,
341 symbol_filter_t filter)
343 if (map__load(map, filter) < 0)
346 if (!dso__sorted_by_name(map->dso, map->type))
347 dso__sort_by_name(map->dso, map->type);
349 return dso__find_symbol_by_name(map->dso, map->type, name);
352 struct map *map__clone(struct map *from)
354 struct map *map = memdup(from, sizeof(*map));
357 atomic_set(&map->refcnt, 1);
358 RB_CLEAR_NODE(&map->rb_node);
366 int map__overlap(struct map *l, struct map *r)
368 if (l->start > r->start) {
374 if (l->end > r->start)
380 size_t map__fprintf(struct map *map, FILE *fp)
382 return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %" PRIx64 " %s\n",
383 map->start, map->end, map->pgoff, map->dso->name);
386 size_t map__fprintf_dsoname(struct map *map, FILE *fp)
388 const char *dsoname = "[unknown]";
390 if (map && map->dso && (map->dso->name || map->dso->long_name)) {
391 if (symbol_conf.show_kernel_path && map->dso->long_name)
392 dsoname = map->dso->long_name;
393 else if (map->dso->name)
394 dsoname = map->dso->name;
397 return fprintf(fp, "%s", dsoname);
400 int map__fprintf_srcline(struct map *map, u64 addr, const char *prefix,
406 if (map && map->dso) {
407 srcline = get_srcline(map->dso,
408 map__rip_2objdump(map, addr), NULL, true);
409 if (srcline != SRCLINE_UNKNOWN)
410 ret = fprintf(fp, "%s%s", prefix, srcline);
411 free_srcline(srcline);
417 * map__rip_2objdump - convert symbol start address to objdump address.
419 * @rip: symbol start address
421 * objdump wants/reports absolute IPs for ET_EXEC, and RIPs for ET_DYN.
422 * map->dso->adjust_symbols==1 for ET_EXEC-like cases except ET_REL which is
423 * relative to section start.
425 * Return: Address suitable for passing to "objdump --start-address="
427 u64 map__rip_2objdump(struct map *map, u64 rip)
429 if (!map->dso->adjust_symbols)
433 return rip - map->pgoff;
436 * kernel modules also have DSO_TYPE_USER in dso->kernel,
437 * but all kernel modules are ET_REL, so won't get here.
439 if (map->dso->kernel == DSO_TYPE_USER)
440 return rip + map->dso->text_offset;
442 return map->unmap_ip(map, rip) - map->reloc;
446 * map__objdump_2mem - convert objdump address to a memory address.
448 * @ip: objdump address
450 * Closely related to map__rip_2objdump(), this function takes an address from
451 * objdump and converts it to a memory address. Note this assumes that @map
452 * contains the address. To be sure the result is valid, check it forwards
453 * e.g. map__rip_2objdump(map->map_ip(map, map__objdump_2mem(map, ip))) == ip
455 * Return: Memory address.
457 u64 map__objdump_2mem(struct map *map, u64 ip)
459 if (!map->dso->adjust_symbols)
460 return map->unmap_ip(map, ip);
463 return map->unmap_ip(map, ip + map->pgoff);
466 * kernel modules also have DSO_TYPE_USER in dso->kernel,
467 * but all kernel modules are ET_REL, so won't get here.
469 if (map->dso->kernel == DSO_TYPE_USER)
470 return map->unmap_ip(map, ip - map->dso->text_offset);
472 return ip + map->reloc;
475 static void maps__init(struct maps *maps)
477 maps->entries = RB_ROOT;
478 pthread_rwlock_init(&maps->lock, NULL);
481 void map_groups__init(struct map_groups *mg, struct machine *machine)
484 for (i = 0; i < MAP__NR_TYPES; ++i) {
485 maps__init(&mg->maps[i]);
487 mg->machine = machine;
488 atomic_set(&mg->refcnt, 1);
491 static void __maps__purge(struct maps *maps)
493 struct rb_root *root = &maps->entries;
494 struct rb_node *next = rb_first(root);
497 struct map *pos = rb_entry(next, struct map, rb_node);
499 next = rb_next(&pos->rb_node);
500 rb_erase_init(&pos->rb_node, root);
505 static void maps__exit(struct maps *maps)
507 pthread_rwlock_wrlock(&maps->lock);
509 pthread_rwlock_unlock(&maps->lock);
512 void map_groups__exit(struct map_groups *mg)
516 for (i = 0; i < MAP__NR_TYPES; ++i)
517 maps__exit(&mg->maps[i]);
520 bool map_groups__empty(struct map_groups *mg)
524 for (i = 0; i < MAP__NR_TYPES; ++i) {
525 if (maps__first(&mg->maps[i]))
532 struct map_groups *map_groups__new(struct machine *machine)
534 struct map_groups *mg = malloc(sizeof(*mg));
537 map_groups__init(mg, machine);
542 void map_groups__delete(struct map_groups *mg)
544 map_groups__exit(mg);
548 void map_groups__put(struct map_groups *mg)
550 if (mg && atomic_dec_and_test(&mg->refcnt))
551 map_groups__delete(mg);
554 struct symbol *map_groups__find_symbol(struct map_groups *mg,
555 enum map_type type, u64 addr,
557 symbol_filter_t filter)
559 struct map *map = map_groups__find(mg, type, addr);
561 /* Ensure map is loaded before using map->map_ip */
562 if (map != NULL && map__load(map, filter) >= 0) {
565 return map__find_symbol(map, map->map_ip(map, addr), filter);
571 struct symbol *maps__find_symbol_by_name(struct maps *maps, const char *name,
572 struct map **mapp, symbol_filter_t filter)
577 pthread_rwlock_rdlock(&maps->lock);
579 for (nd = rb_first(&maps->entries); nd; nd = rb_next(nd)) {
580 struct map *pos = rb_entry(nd, struct map, rb_node);
582 sym = map__find_symbol_by_name(pos, name, filter);
593 pthread_rwlock_unlock(&maps->lock);
597 struct symbol *map_groups__find_symbol_by_name(struct map_groups *mg,
601 symbol_filter_t filter)
603 struct symbol *sym = maps__find_symbol_by_name(&mg->maps[type], name, mapp, filter);
608 int map_groups__find_ams(struct addr_map_symbol *ams, symbol_filter_t filter)
610 if (ams->addr < ams->map->start || ams->addr >= ams->map->end) {
611 if (ams->map->groups == NULL)
613 ams->map = map_groups__find(ams->map->groups, ams->map->type,
615 if (ams->map == NULL)
619 ams->al_addr = ams->map->map_ip(ams->map, ams->addr);
620 ams->sym = map__find_symbol(ams->map, ams->al_addr, filter);
622 return ams->sym ? 0 : -1;
625 static size_t maps__fprintf(struct maps *maps, FILE *fp)
630 pthread_rwlock_rdlock(&maps->lock);
632 for (nd = rb_first(&maps->entries); nd; nd = rb_next(nd)) {
633 struct map *pos = rb_entry(nd, struct map, rb_node);
634 printed += fprintf(fp, "Map:");
635 printed += map__fprintf(pos, fp);
637 printed += dso__fprintf(pos->dso, pos->type, fp);
638 printed += fprintf(fp, "--\n");
642 pthread_rwlock_unlock(&maps->lock);
647 size_t __map_groups__fprintf_maps(struct map_groups *mg, enum map_type type,
650 size_t printed = fprintf(fp, "%s:\n", map_type__name[type]);
651 return printed += maps__fprintf(&mg->maps[type], fp);
654 size_t map_groups__fprintf(struct map_groups *mg, FILE *fp)
656 size_t printed = 0, i;
657 for (i = 0; i < MAP__NR_TYPES; ++i)
658 printed += __map_groups__fprintf_maps(mg, i, fp);
662 static void __map_groups__insert(struct map_groups *mg, struct map *map)
664 __maps__insert(&mg->maps[map->type], map);
668 static int maps__fixup_overlappings(struct maps *maps, struct map *map, FILE *fp)
670 struct rb_root *root;
671 struct rb_node *next;
674 pthread_rwlock_wrlock(&maps->lock);
676 root = &maps->entries;
677 next = rb_first(root);
680 struct map *pos = rb_entry(next, struct map, rb_node);
681 next = rb_next(&pos->rb_node);
683 if (!map__overlap(pos, map))
687 fputs("overlapping maps:\n", fp);
688 map__fprintf(map, fp);
689 map__fprintf(pos, fp);
692 rb_erase_init(&pos->rb_node, root);
694 * Now check if we need to create new maps for areas not
695 * overlapped by the new map:
697 if (map->start > pos->start) {
698 struct map *before = map__clone(pos);
700 if (before == NULL) {
705 before->end = map->start;
706 __map_groups__insert(pos->groups, before);
708 map__fprintf(before, fp);
712 if (map->end < pos->end) {
713 struct map *after = map__clone(pos);
720 after->start = map->end;
721 __map_groups__insert(pos->groups, after);
723 map__fprintf(after, fp);
735 pthread_rwlock_unlock(&maps->lock);
739 int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map,
742 return maps__fixup_overlappings(&mg->maps[map->type], map, fp);
746 * XXX This should not really _copy_ te maps, but refcount them.
748 int map_groups__clone(struct thread *thread,
749 struct map_groups *parent, enum map_type type)
751 struct map_groups *mg = thread->mg;
754 struct maps *maps = &parent->maps[type];
756 pthread_rwlock_rdlock(&maps->lock);
758 for (map = maps__first(maps); map; map = map__next(map)) {
759 struct map *new = map__clone(map);
763 err = unwind__prepare_access(thread, new, NULL);
767 map_groups__insert(mg, new);
773 pthread_rwlock_unlock(&maps->lock);
777 static void __maps__insert(struct maps *maps, struct map *map)
779 struct rb_node **p = &maps->entries.rb_node;
780 struct rb_node *parent = NULL;
781 const u64 ip = map->start;
786 m = rb_entry(parent, struct map, rb_node);
793 rb_link_node(&map->rb_node, parent, p);
794 rb_insert_color(&map->rb_node, &maps->entries);
798 void maps__insert(struct maps *maps, struct map *map)
800 pthread_rwlock_wrlock(&maps->lock);
801 __maps__insert(maps, map);
802 pthread_rwlock_unlock(&maps->lock);
805 static void __maps__remove(struct maps *maps, struct map *map)
807 rb_erase_init(&map->rb_node, &maps->entries);
811 void maps__remove(struct maps *maps, struct map *map)
813 pthread_rwlock_wrlock(&maps->lock);
814 __maps__remove(maps, map);
815 pthread_rwlock_unlock(&maps->lock);
818 struct map *maps__find(struct maps *maps, u64 ip)
820 struct rb_node **p, *parent = NULL;
823 pthread_rwlock_rdlock(&maps->lock);
825 p = &maps->entries.rb_node;
828 m = rb_entry(parent, struct map, rb_node);
831 else if (ip >= m->end)
839 pthread_rwlock_unlock(&maps->lock);
843 struct map *maps__first(struct maps *maps)
845 struct rb_node *first = rb_first(&maps->entries);
848 return rb_entry(first, struct map, rb_node);
852 struct map *map__next(struct map *map)
854 struct rb_node *next = rb_next(&map->rb_node);
857 return rb_entry(next, struct map, rb_node);
861 struct kmap *map__kmap(struct map *map)
863 if (!map->dso || !map->dso->kernel) {
864 pr_err("Internal error: map__kmap with a non-kernel map\n");
867 return (struct kmap *)(map + 1);
870 struct map_groups *map__kmaps(struct map *map)
872 struct kmap *kmap = map__kmap(map);
874 if (!kmap || !kmap->kmaps) {
875 pr_err("Internal error: map__kmaps with a non-kernel map\n");