18 #include <linux/string.h>
21 static void __maps__insert(struct maps *maps, struct map *map);
23 const char *map_type__name[MAP__NR_TYPES] = {
24 [MAP__FUNCTION] = "Functions",
25 [MAP__VARIABLE] = "Variables",
28 static inline int is_anon_memory(const char *filename, u32 flags)
33 anon_flags |= MAP_HUGETLB;
35 return flags & anon_flags ||
36 !strcmp(filename, "//anon") ||
37 !strncmp(filename, "/dev/zero", sizeof("/dev/zero") - 1) ||
38 !strncmp(filename, "/anon_hugepage", sizeof("/anon_hugepage") - 1);
41 static inline int is_no_dso_memory(const char *filename)
43 return !strncmp(filename, "[stack", 6) ||
44 !strncmp(filename, "/SYSV",5) ||
45 !strcmp(filename, "[heap]");
48 static inline int is_android_lib(const char *filename)
50 return !strncmp(filename, "/data/app-lib", 13) ||
51 !strncmp(filename, "/system/lib", 11);
54 static inline bool replace_android_lib(const char *filename, char *newfilename)
58 size_t app_abi_length, new_length;
59 size_t lib_length = 0;
61 libname = strrchr(filename, '/');
63 lib_length = strlen(libname);
65 app_abi = getenv("APP_ABI");
69 app_abi_length = strlen(app_abi);
71 if (!strncmp(filename, "/data/app-lib", 13)) {
77 new_length = 7 + app_abi_length + lib_length;
79 apk_path = getenv("APK_PATH");
81 new_length += strlen(apk_path) + 1;
82 if (new_length > PATH_MAX)
84 snprintf(newfilename, new_length,
85 "%s/libs/%s/%s", apk_path, app_abi, libname);
87 if (new_length > PATH_MAX)
89 snprintf(newfilename, new_length,
90 "libs/%s/%s", app_abi, libname);
95 if (!strncmp(filename, "/system/lib/", 11)) {
101 ndk = getenv("NDK_ROOT");
102 app = getenv("APP_PLATFORM");
107 ndk_length = strlen(ndk);
108 app_length = strlen(app);
110 if (!(ndk_length && app_length && app_abi_length))
113 arch = !strncmp(app_abi, "arm", 3) ? "arm" :
114 !strncmp(app_abi, "mips", 4) ? "mips" :
115 !strncmp(app_abi, "x86", 3) ? "x86" : NULL;
120 new_length = 27 + ndk_length +
121 app_length + lib_length
124 if (new_length > PATH_MAX)
126 snprintf(newfilename, new_length,
127 "%s/platforms/%s/arch-%s/usr/lib/%s",
128 ndk, app, arch, libname);
135 void map__init(struct map *map, enum map_type type,
136 u64 start, u64 end, u64 pgoff, struct dso *dso)
143 map->dso = dso__get(dso);
144 map->map_ip = map__map_ip;
145 map->unmap_ip = map__unmap_ip;
146 RB_CLEAR_NODE(&map->rb_node);
148 map->erange_warned = false;
149 atomic_set(&map->refcnt, 1);
152 struct map *map__new(struct machine *machine, u64 start, u64 len,
153 u64 pgoff, u32 pid, u32 d_maj, u32 d_min, u64 ino,
154 u64 ino_gen, u32 prot, u32 flags, char *filename,
155 enum map_type type, struct thread *thread)
157 struct map *map = malloc(sizeof(*map));
160 char newfilename[PATH_MAX];
162 int anon, no_dso, vdso, android;
164 android = is_android_lib(filename);
165 anon = is_anon_memory(filename, flags);
166 vdso = is_vdso_map(filename);
167 no_dso = is_no_dso_memory(filename);
172 map->ino_generation = ino_gen;
176 if ((anon || no_dso) && type == MAP__FUNCTION) {
177 snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", pid);
178 filename = newfilename;
182 if (replace_android_lib(filename, newfilename))
183 filename = newfilename;
188 dso = machine__findnew_vdso(machine, thread);
190 dso = machine__findnew_dso(machine, filename);
195 map__init(map, type, start, start + len, pgoff, dso);
197 if (anon || no_dso) {
198 map->map_ip = map->unmap_ip = identity__map_ip;
201 * Set memory without DSO as loaded. All map__find_*
202 * functions still return NULL, and we avoid the
203 * unnecessary map__load warning.
205 if (type != MAP__FUNCTION)
206 dso__set_loaded(dso, map->type);
217 * Constructor variant for modules (where we know from /proc/modules where
218 * they are loaded) and for vmlinux, where only after we load all the
219 * symbols we'll know where it starts and ends.
221 struct map *map__new2(u64 start, struct dso *dso, enum map_type type)
223 struct map *map = calloc(1, (sizeof(*map) +
224 (dso->kernel ? sizeof(struct kmap) : 0)));
227 * ->end will be filled after we load all the symbols
229 map__init(map, type, start, 0, 0, dso);
236 * Use this and __map__is_kmodule() for map instances that are in
237 * machine->kmaps, and thus have map->groups->machine all properly set, to
238 * disambiguate between the kernel and modules.
240 * When the need arises, introduce map__is_{kernel,kmodule)() that
241 * checks (map->groups != NULL && map->groups->machine != NULL &&
242 * map->dso->kernel) before calling __map__is_{kernel,kmodule}())
244 bool __map__is_kernel(const struct map *map)
246 return __machine__kernel_map(map->groups->machine, map->type) == map;
249 static void map__exit(struct map *map)
251 BUG_ON(!RB_EMPTY_NODE(&map->rb_node));
255 void map__delete(struct map *map)
261 void map__put(struct map *map)
263 if (map && atomic_dec_and_test(&map->refcnt))
267 void map__fixup_start(struct map *map)
269 struct rb_root *symbols = &map->dso->symbols[map->type];
270 struct rb_node *nd = rb_first(symbols);
272 struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
273 map->start = sym->start;
277 void map__fixup_end(struct map *map)
279 struct rb_root *symbols = &map->dso->symbols[map->type];
280 struct rb_node *nd = rb_last(symbols);
282 struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
287 #define DSO__DELETED "(deleted)"
289 int map__load(struct map *map)
291 const char *name = map->dso->long_name;
294 if (dso__loaded(map->dso, map->type))
297 nr = dso__load(map->dso, map);
299 if (map->dso->has_build_id) {
300 char sbuild_id[SBUILD_ID_SIZE];
302 build_id__sprintf(map->dso->build_id,
303 sizeof(map->dso->build_id),
305 pr_warning("%s with build id %s not found",
308 pr_warning("Failed to open %s", name);
310 pr_warning(", continuing without symbols\n");
312 } else if (nr == 0) {
313 #ifdef HAVE_LIBELF_SUPPORT
314 const size_t len = strlen(name);
315 const size_t real_len = len - sizeof(DSO__DELETED);
317 if (len > sizeof(DSO__DELETED) &&
318 strcmp(name + real_len + 1, DSO__DELETED) == 0) {
319 pr_warning("%.*s was updated (is prelink enabled?). "
320 "Restart the long running apps that use it!\n",
321 (int)real_len, name);
323 pr_warning("no symbols found in %s, maybe install "
324 "a debug package?\n", name);
333 int __weak arch__compare_symbol_names(const char *namea, const char *nameb)
335 return strcmp(namea, nameb);
338 struct symbol *map__find_symbol(struct map *map, u64 addr)
340 if (map__load(map) < 0)
343 return dso__find_symbol(map->dso, map->type, addr);
346 struct symbol *map__find_symbol_by_name(struct map *map, const char *name)
348 if (map__load(map) < 0)
351 if (!dso__sorted_by_name(map->dso, map->type))
352 dso__sort_by_name(map->dso, map->type);
354 return dso__find_symbol_by_name(map->dso, map->type, name);
357 struct map *map__clone(struct map *from)
359 struct map *map = memdup(from, sizeof(*map));
362 atomic_set(&map->refcnt, 1);
363 RB_CLEAR_NODE(&map->rb_node);
371 int map__overlap(struct map *l, struct map *r)
373 if (l->start > r->start) {
379 if (l->end > r->start)
385 size_t map__fprintf(struct map *map, FILE *fp)
387 return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %" PRIx64 " %s\n",
388 map->start, map->end, map->pgoff, map->dso->name);
391 size_t map__fprintf_dsoname(struct map *map, FILE *fp)
393 const char *dsoname = "[unknown]";
395 if (map && map->dso && (map->dso->name || map->dso->long_name)) {
396 if (symbol_conf.show_kernel_path && map->dso->long_name)
397 dsoname = map->dso->long_name;
398 else if (map->dso->name)
399 dsoname = map->dso->name;
402 return fprintf(fp, "%s", dsoname);
405 int map__fprintf_srcline(struct map *map, u64 addr, const char *prefix,
411 if (map && map->dso) {
412 srcline = get_srcline(map->dso,
413 map__rip_2objdump(map, addr), NULL, true);
414 if (srcline != SRCLINE_UNKNOWN)
415 ret = fprintf(fp, "%s%s", prefix, srcline);
416 free_srcline(srcline);
422 * map__rip_2objdump - convert symbol start address to objdump address.
424 * @rip: symbol start address
426 * objdump wants/reports absolute IPs for ET_EXEC, and RIPs for ET_DYN.
427 * map->dso->adjust_symbols==1 for ET_EXEC-like cases except ET_REL which is
428 * relative to section start.
430 * Return: Address suitable for passing to "objdump --start-address="
432 u64 map__rip_2objdump(struct map *map, u64 rip)
434 if (!map->dso->adjust_symbols)
438 return rip - map->pgoff;
441 * kernel modules also have DSO_TYPE_USER in dso->kernel,
442 * but all kernel modules are ET_REL, so won't get here.
444 if (map->dso->kernel == DSO_TYPE_USER)
445 return rip + map->dso->text_offset;
447 return map->unmap_ip(map, rip) - map->reloc;
451 * map__objdump_2mem - convert objdump address to a memory address.
453 * @ip: objdump address
455 * Closely related to map__rip_2objdump(), this function takes an address from
456 * objdump and converts it to a memory address. Note this assumes that @map
457 * contains the address. To be sure the result is valid, check it forwards
458 * e.g. map__rip_2objdump(map->map_ip(map, map__objdump_2mem(map, ip))) == ip
460 * Return: Memory address.
462 u64 map__objdump_2mem(struct map *map, u64 ip)
464 if (!map->dso->adjust_symbols)
465 return map->unmap_ip(map, ip);
468 return map->unmap_ip(map, ip + map->pgoff);
471 * kernel modules also have DSO_TYPE_USER in dso->kernel,
472 * but all kernel modules are ET_REL, so won't get here.
474 if (map->dso->kernel == DSO_TYPE_USER)
475 return map->unmap_ip(map, ip - map->dso->text_offset);
477 return ip + map->reloc;
480 static void maps__init(struct maps *maps)
482 maps->entries = RB_ROOT;
483 pthread_rwlock_init(&maps->lock, NULL);
486 void map_groups__init(struct map_groups *mg, struct machine *machine)
489 for (i = 0; i < MAP__NR_TYPES; ++i) {
490 maps__init(&mg->maps[i]);
492 mg->machine = machine;
493 atomic_set(&mg->refcnt, 1);
496 static void __maps__purge(struct maps *maps)
498 struct rb_root *root = &maps->entries;
499 struct rb_node *next = rb_first(root);
502 struct map *pos = rb_entry(next, struct map, rb_node);
504 next = rb_next(&pos->rb_node);
505 rb_erase_init(&pos->rb_node, root);
510 static void maps__exit(struct maps *maps)
512 pthread_rwlock_wrlock(&maps->lock);
514 pthread_rwlock_unlock(&maps->lock);
517 void map_groups__exit(struct map_groups *mg)
521 for (i = 0; i < MAP__NR_TYPES; ++i)
522 maps__exit(&mg->maps[i]);
525 bool map_groups__empty(struct map_groups *mg)
529 for (i = 0; i < MAP__NR_TYPES; ++i) {
530 if (maps__first(&mg->maps[i]))
537 struct map_groups *map_groups__new(struct machine *machine)
539 struct map_groups *mg = malloc(sizeof(*mg));
542 map_groups__init(mg, machine);
547 void map_groups__delete(struct map_groups *mg)
549 map_groups__exit(mg);
553 void map_groups__put(struct map_groups *mg)
555 if (mg && atomic_dec_and_test(&mg->refcnt))
556 map_groups__delete(mg);
559 struct symbol *map_groups__find_symbol(struct map_groups *mg,
560 enum map_type type, u64 addr,
563 struct map *map = map_groups__find(mg, type, addr);
565 /* Ensure map is loaded before using map->map_ip */
566 if (map != NULL && map__load(map) >= 0) {
569 return map__find_symbol(map, map->map_ip(map, addr));
575 struct symbol *maps__find_symbol_by_name(struct maps *maps, const char *name,
581 pthread_rwlock_rdlock(&maps->lock);
583 for (nd = rb_first(&maps->entries); nd; nd = rb_next(nd)) {
584 struct map *pos = rb_entry(nd, struct map, rb_node);
586 sym = map__find_symbol_by_name(pos, name);
597 pthread_rwlock_unlock(&maps->lock);
601 struct symbol *map_groups__find_symbol_by_name(struct map_groups *mg,
606 struct symbol *sym = maps__find_symbol_by_name(&mg->maps[type], name, mapp);
611 int map_groups__find_ams(struct addr_map_symbol *ams)
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);
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");