#include "symbol.h" #include #include #include #include #include #include #include #include "map.h" #include "thread.h" #include "strlist.h" #include "vdso.h" #include "build-id.h" #include "util.h" #include "debug.h" #include "machine.h" #include const char *map_type__name[MAP__NR_TYPES] = { [MAP__FUNCTION] = "Functions", [MAP__VARIABLE] = "Variables", }; static inline int is_anon_memory(const char *filename) { return !strcmp(filename, "//anon") || !strcmp(filename, "/dev/zero (deleted)") || !strcmp(filename, "/anon_hugepage (deleted)"); } static inline int is_no_dso_memory(const char *filename) { return !strncmp(filename, "[stack", 6) || !strncmp(filename, "/SYSV",5) || !strcmp(filename, "[heap]"); } static inline int is_android_lib(const char *filename) { return !strncmp(filename, "/data/app-lib", 13) || !strncmp(filename, "/system/lib", 11); } static inline bool replace_android_lib(const char *filename, char *newfilename) { const char *libname; char *app_abi; size_t app_abi_length, new_length; size_t lib_length = 0; libname = strrchr(filename, '/'); if (libname) lib_length = strlen(libname); app_abi = getenv("APP_ABI"); if (!app_abi) return false; app_abi_length = strlen(app_abi); if (!strncmp(filename, "/data/app-lib", 13)) { char *apk_path; if (!app_abi_length) return false; new_length = 7 + app_abi_length + lib_length; apk_path = getenv("APK_PATH"); if (apk_path) { new_length += strlen(apk_path) + 1; if (new_length > PATH_MAX) return false; snprintf(newfilename, new_length, "%s/libs/%s/%s", apk_path, app_abi, libname); } else { if (new_length > PATH_MAX) return false; snprintf(newfilename, new_length, "libs/%s/%s", app_abi, libname); } return true; } if (!strncmp(filename, "/system/lib/", 11)) { char *ndk, *app; const char *arch; size_t ndk_length; size_t app_length; ndk = getenv("NDK_ROOT"); app = getenv("APP_PLATFORM"); if (!(ndk && app)) return false; ndk_length = strlen(ndk); app_length = strlen(app); if (!(ndk_length && app_length && app_abi_length)) return false; arch = !strncmp(app_abi, "arm", 3) ? "arm" : !strncmp(app_abi, "mips", 4) ? "mips" : !strncmp(app_abi, "x86", 3) ? "x86" : NULL; if (!arch) return false; new_length = 27 + ndk_length + app_length + lib_length + strlen(arch); if (new_length > PATH_MAX) return false; snprintf(newfilename, new_length, "%s/platforms/%s/arch-%s/usr/lib/%s", ndk, app, arch, libname); return true; } return false; } void map__init(struct map *map, enum map_type type, u64 start, u64 end, u64 pgoff, struct dso *dso) { map->type = type; map->start = start; map->end = end; map->pgoff = pgoff; map->reloc = 0; map->dso = dso; map->map_ip = map__map_ip; map->unmap_ip = map__unmap_ip; RB_CLEAR_NODE(&map->rb_node); map->groups = NULL; map->referenced = false; map->erange_warned = false; } struct map *map__new(struct machine *machine, u64 start, u64 len, u64 pgoff, u32 pid, u32 d_maj, u32 d_min, u64 ino, u64 ino_gen, u32 prot, u32 flags, char *filename, enum map_type type, struct thread *thread) { struct map *map = malloc(sizeof(*map)); if (map != NULL) { char newfilename[PATH_MAX]; struct dso *dso; int anon, no_dso, vdso, android; android = is_android_lib(filename); anon = is_anon_memory(filename); vdso = is_vdso_map(filename); no_dso = is_no_dso_memory(filename); map->maj = d_maj; map->min = d_min; map->ino = ino; map->ino_generation = ino_gen; map->prot = prot; map->flags = flags; if ((anon || no_dso) && type == MAP__FUNCTION) { snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", pid); filename = newfilename; } if (android) { if (replace_android_lib(filename, newfilename)) filename = newfilename; } if (vdso) { pgoff = 0; dso = vdso__dso_findnew(machine, thread); } else dso = __dsos__findnew(&machine->user_dsos, filename); if (dso == NULL) goto out_delete; map__init(map, type, start, start + len, pgoff, dso); if (anon || no_dso) { map->map_ip = map->unmap_ip = identity__map_ip; /* * Set memory without DSO as loaded. All map__find_* * functions still return NULL, and we avoid the * unnecessary map__load warning. */ if (type != MAP__FUNCTION) dso__set_loaded(dso, map->type); } } return map; out_delete: free(map); return NULL; } /* * Constructor variant for modules (where we know from /proc/modules where * they are loaded) and for vmlinux, where only after we load all the * symbols we'll know where it starts and ends. */ struct map *map__new2(u64 start, struct dso *dso, enum map_type type) { struct map *map = calloc(1, (sizeof(*map) + (dso->kernel ? sizeof(struct kmap) : 0))); if (map != NULL) { /* * ->end will be filled after we load all the symbols */ map__init(map, type, start, 0, 0, dso); } return map; } void map__delete(struct map *map) { free(map); } void map__fixup_start(struct map *map) { struct rb_root *symbols = &map->dso->symbols[map->type]; struct rb_node *nd = rb_first(symbols); if (nd != NULL) { struct symbol *sym = rb_entry(nd, struct symbol, rb_node); map->start = sym->start; } } void map__fixup_end(struct map *map) { struct rb_root *symbols = &map->dso->symbols[map->type]; struct rb_node *nd = rb_last(symbols); if (nd != NULL) { struct symbol *sym = rb_entry(nd, struct symbol, rb_node); map->end = sym->end; } } #define DSO__DELETED "(deleted)" int map__load(struct map *map, symbol_filter_t filter) { const char *name = map->dso->long_name; int nr; if (dso__loaded(map->dso, map->type)) return 0; nr = dso__load(map->dso, map, filter); if (nr < 0) { if (map->dso->has_build_id) { char sbuild_id[BUILD_ID_SIZE * 2 + 1]; build_id__sprintf(map->dso->build_id, sizeof(map->dso->build_id), sbuild_id); pr_warning("%s with build id %s not found", name, sbuild_id); } else pr_warning("Failed to open %s", name); pr_warning(", continuing without symbols\n"); return -1; } else if (nr == 0) { #ifdef HAVE_LIBELF_SUPPORT const size_t len = strlen(name); const size_t real_len = len - sizeof(DSO__DELETED); if (len > sizeof(DSO__DELETED) && strcmp(name + real_len + 1, DSO__DELETED) == 0) { pr_warning("%.*s was updated (is prelink enabled?). " "Restart the long running apps that use it!\n", (int)real_len, name); } else { pr_warning("no symbols found in %s, maybe install " "a debug package?\n", name); } #endif return -1; } return 0; } struct symbol *map__find_symbol(struct map *map, u64 addr, symbol_filter_t filter) { if (map__load(map, filter) < 0) return NULL; return dso__find_symbol(map->dso, map->type, addr); } struct symbol *map__find_symbol_by_name(struct map *map, const char *name, symbol_filter_t filter) { if (map__load(map, filter) < 0) return NULL; if (!dso__sorted_by_name(map->dso, map->type)) dso__sort_by_name(map->dso, map->type); return dso__find_symbol_by_name(map->dso, map->type, name); } struct map *map__clone(struct map *map) { return memdup(map, sizeof(*map)); } int map__overlap(struct map *l, struct map *r) { if (l->start > r->start) { struct map *t = l; l = r; r = t; } if (l->end > r->start) return 1; return 0; } size_t map__fprintf(struct map *map, FILE *fp) { return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %" PRIx64 " %s\n", map->start, map->end, map->pgoff, map->dso->name); } size_t map__fprintf_dsoname(struct map *map, FILE *fp) { const char *dsoname = "[unknown]"; if (map && map->dso && (map->dso->name || map->dso->long_name)) { if (symbol_conf.show_kernel_path && map->dso->long_name) dsoname = map->dso->long_name; else if (map->dso->name) dsoname = map->dso->name; } return fprintf(fp, "%s", dsoname); } int map__fprintf_srcline(struct map *map, u64 addr, const char *prefix, FILE *fp) { char *srcline; int ret = 0; if (map && map->dso) { srcline = get_srcline(map->dso, map__rip_2objdump(map, addr)); if (srcline != SRCLINE_UNKNOWN) ret = fprintf(fp, "%s%s", prefix, srcline); free_srcline(srcline); } return ret; } /** * map__rip_2objdump - convert symbol start address to objdump address. * @map: memory map * @rip: symbol start address * * objdump wants/reports absolute IPs for ET_EXEC, and RIPs for ET_DYN. * map->dso->adjust_symbols==1 for ET_EXEC-like cases except ET_REL which is * relative to section start. * * Return: Address suitable for passing to "objdump --start-address=" */ u64 map__rip_2objdump(struct map *map, u64 rip) { if (!map->dso->adjust_symbols) return rip; if (map->dso->rel) return rip - map->pgoff; return map->unmap_ip(map, rip) - map->reloc; } /** * map__objdump_2mem - convert objdump address to a memory address. * @map: memory map * @ip: objdump address * * Closely related to map__rip_2objdump(), this function takes an address from * objdump and converts it to a memory address. Note this assumes that @map * contains the address. To be sure the result is valid, check it forwards * e.g. map__rip_2objdump(map->map_ip(map, map__objdump_2mem(map, ip))) == ip * * Return: Memory address. */ u64 map__objdump_2mem(struct map *map, u64 ip) { if (!map->dso->adjust_symbols) return map->unmap_ip(map, ip); if (map->dso->rel) return map->unmap_ip(map, ip + map->pgoff); return ip + map->reloc; } void map_groups__init(struct map_groups *mg, struct machine *machine) { int i; for (i = 0; i < MAP__NR_TYPES; ++i) { mg->maps[i] = RB_ROOT; INIT_LIST_HEAD(&mg->removed_maps[i]); } mg->machine = machine; mg->refcnt = 1; } static void maps__delete(struct rb_root *maps) { struct rb_node *next = rb_first(maps); while (next) { struct map *pos = rb_entry(next, struct map, rb_node); next = rb_next(&pos->rb_node); rb_erase(&pos->rb_node, maps); map__delete(pos); } } static void maps__delete_removed(struct list_head *maps) { struct map *pos, *n; list_for_each_entry_safe(pos, n, maps, node) { list_del(&pos->node); map__delete(pos); } } void map_groups__exit(struct map_groups *mg) { int i; for (i = 0; i < MAP__NR_TYPES; ++i) { maps__delete(&mg->maps[i]); maps__delete_removed(&mg->removed_maps[i]); } } bool map_groups__empty(struct map_groups *mg) { int i; for (i = 0; i < MAP__NR_TYPES; ++i) { if (maps__first(&mg->maps[i])) return false; if (!list_empty(&mg->removed_maps[i])) return false; } return true; } struct map_groups *map_groups__new(struct machine *machine) { struct map_groups *mg = malloc(sizeof(*mg)); if (mg != NULL) map_groups__init(mg, machine); return mg; } void map_groups__delete(struct map_groups *mg) { map_groups__exit(mg); free(mg); } void map_groups__put(struct map_groups *mg) { if (--mg->refcnt == 0) map_groups__delete(mg); } void map_groups__flush(struct map_groups *mg) { int type; for (type = 0; type < MAP__NR_TYPES; type++) { struct rb_root *root = &mg->maps[type]; struct rb_node *next = rb_first(root); while (next) { struct map *pos = rb_entry(next, struct map, rb_node); next = rb_next(&pos->rb_node); rb_erase(&pos->rb_node, root); /* * We may have references to this map, for * instance in some hist_entry instances, so * just move them to a separate list. */ list_add_tail(&pos->node, &mg->removed_maps[pos->type]); } } } struct symbol *map_groups__find_symbol(struct map_groups *mg, enum map_type type, u64 addr, struct map **mapp, symbol_filter_t filter) { struct map *map = map_groups__find(mg, type, addr); /* Ensure map is loaded before using map->map_ip */ if (map != NULL && map__load(map, filter) >= 0) { if (mapp != NULL) *mapp = map; return map__find_symbol(map, map->map_ip(map, addr), filter); } return NULL; } struct symbol *map_groups__find_symbol_by_name(struct map_groups *mg, enum map_type type, const char *name, struct map **mapp, symbol_filter_t filter) { struct rb_node *nd; for (nd = rb_first(&mg->maps[type]); nd; nd = rb_next(nd)) { struct map *pos = rb_entry(nd, struct map, rb_node); struct symbol *sym = map__find_symbol_by_name(pos, name, filter); if (sym == NULL) continue; if (mapp != NULL) *mapp = pos; return sym; } return NULL; } int map_groups__find_ams(struct addr_map_symbol *ams, symbol_filter_t filter) { if (ams->addr < ams->map->start || ams->addr >= ams->map->end) { if (ams->map->groups == NULL) return -1; ams->map = map_groups__find(ams->map->groups, ams->map->type, ams->addr); if (ams->map == NULL) return -1; } ams->al_addr = ams->map->map_ip(ams->map, ams->addr); ams->sym = map__find_symbol(ams->map, ams->al_addr, filter); return ams->sym ? 0 : -1; } size_t __map_groups__fprintf_maps(struct map_groups *mg, enum map_type type, FILE *fp) { size_t printed = fprintf(fp, "%s:\n", map_type__name[type]); struct rb_node *nd; for (nd = rb_first(&mg->maps[type]); nd; nd = rb_next(nd)) { struct map *pos = rb_entry(nd, struct map, rb_node); printed += fprintf(fp, "Map:"); printed += map__fprintf(pos, fp); if (verbose > 2) { printed += dso__fprintf(pos->dso, type, fp); printed += fprintf(fp, "--\n"); } } return printed; } static size_t map_groups__fprintf_maps(struct map_groups *mg, FILE *fp) { size_t printed = 0, i; for (i = 0; i < MAP__NR_TYPES; ++i) printed += __map_groups__fprintf_maps(mg, i, fp); return printed; } static size_t __map_groups__fprintf_removed_maps(struct map_groups *mg, enum map_type type, FILE *fp) { struct map *pos; size_t printed = 0; list_for_each_entry(pos, &mg->removed_maps[type], node) { printed += fprintf(fp, "Map:"); printed += map__fprintf(pos, fp); if (verbose > 1) { printed += dso__fprintf(pos->dso, type, fp); printed += fprintf(fp, "--\n"); } } return printed; } static size_t map_groups__fprintf_removed_maps(struct map_groups *mg, FILE *fp) { size_t printed = 0, i; for (i = 0; i < MAP__NR_TYPES; ++i) printed += __map_groups__fprintf_removed_maps(mg, i, fp); return printed; } size_t map_groups__fprintf(struct map_groups *mg, FILE *fp) { size_t printed = map_groups__fprintf_maps(mg, fp); printed += fprintf(fp, "Removed maps:\n"); return printed + map_groups__fprintf_removed_maps(mg, fp); } int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map, FILE *fp) { struct rb_root *root = &mg->maps[map->type]; struct rb_node *next = rb_first(root); int err = 0; while (next) { struct map *pos = rb_entry(next, struct map, rb_node); next = rb_next(&pos->rb_node); if (!map__overlap(pos, map)) continue; if (verbose >= 2) { fputs("overlapping maps:\n", fp); map__fprintf(map, fp); map__fprintf(pos, fp); } rb_erase(&pos->rb_node, root); /* * Now check if we need to create new maps for areas not * overlapped by the new map: */ if (map->start > pos->start) { struct map *before = map__clone(pos); if (before == NULL) { err = -ENOMEM; goto move_map; } before->end = map->start; map_groups__insert(mg, before); if (verbose >= 2) map__fprintf(before, fp); } if (map->end < pos->end) { struct map *after = map__clone(pos); if (after == NULL) { err = -ENOMEM; goto move_map; } after->start = map->end; map_groups__insert(mg, after); if (verbose >= 2) map__fprintf(after, fp); } move_map: /* * If we have references, just move them to a separate list. */ if (pos->referenced) list_add_tail(&pos->node, &mg->removed_maps[map->type]); else map__delete(pos); if (err) return err; } return 0; } /* * XXX This should not really _copy_ te maps, but refcount them. */ int map_groups__clone(struct map_groups *mg, struct map_groups *parent, enum map_type type) { struct rb_node *nd; for (nd = rb_first(&parent->maps[type]); nd; nd = rb_next(nd)) { struct map *map = rb_entry(nd, struct map, rb_node); struct map *new = map__clone(map); if (new == NULL) return -ENOMEM; map_groups__insert(mg, new); } return 0; } void maps__insert(struct rb_root *maps, struct map *map) { struct rb_node **p = &maps->rb_node; struct rb_node *parent = NULL; const u64 ip = map->start; struct map *m; while (*p != NULL) { parent = *p; m = rb_entry(parent, struct map, rb_node); if (ip < m->start) p = &(*p)->rb_left; else p = &(*p)->rb_right; } rb_link_node(&map->rb_node, parent, p); rb_insert_color(&map->rb_node, maps); } void maps__remove(struct rb_root *maps, struct map *map) { rb_erase(&map->rb_node, maps); } struct map *maps__find(struct rb_root *maps, u64 ip) { struct rb_node **p = &maps->rb_node; struct rb_node *parent = NULL; struct map *m; while (*p != NULL) { parent = *p; m = rb_entry(parent, struct map, rb_node); if (ip < m->start) p = &(*p)->rb_left; else if (ip >= m->end) p = &(*p)->rb_right; else return m; } return NULL; } struct map *maps__first(struct rb_root *maps) { struct rb_node *first = rb_first(maps); if (first) return rb_entry(first, struct map, rb_node); return NULL; } struct map *maps__next(struct map *map) { struct rb_node *next = rb_next(&map->rb_node); if (next) return rb_entry(next, struct map, rb_node); return NULL; }