15 #include <linux/string.h>
17 const char *map_type__name[MAP__NR_TYPES] = {
18 [MAP__FUNCTION] = "Functions",
19 [MAP__VARIABLE] = "Variables",
22 static inline int is_anon_memory(const char *filename)
24 return !strcmp(filename, "//anon") ||
25 !strcmp(filename, "/dev/zero (deleted)") ||
26 !strcmp(filename, "/anon_hugepage (deleted)");
29 static inline int is_no_dso_memory(const char *filename)
31 return !strncmp(filename, "[stack", 6) ||
32 !strcmp(filename, "[heap]");
35 void map__init(struct map *map, enum map_type type,
36 u64 start, u64 end, u64 pgoff, struct dso *dso)
43 map->map_ip = map__map_ip;
44 map->unmap_ip = map__unmap_ip;
45 RB_CLEAR_NODE(&map->rb_node);
47 map->referenced = false;
48 map->erange_warned = false;
51 struct map *map__new(struct list_head *dsos__list, u64 start, u64 len,
52 u64 pgoff, u32 pid, u32 d_maj, u32 d_min, u64 ino,
53 u64 ino_gen, char *filename,
56 struct map *map = malloc(sizeof(*map));
59 char newfilename[PATH_MAX];
61 int anon, no_dso, vdso;
63 anon = is_anon_memory(filename);
64 vdso = is_vdso_map(filename);
65 no_dso = is_no_dso_memory(filename);
70 map->ino_generation = ino_gen;
72 if ((anon || no_dso) && type == MAP__FUNCTION) {
73 snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", pid);
74 filename = newfilename;
79 dso = vdso__dso_findnew(dsos__list);
81 dso = __dsos__findnew(dsos__list, filename);
86 map__init(map, type, start, start + len, pgoff, dso);
89 map->map_ip = map->unmap_ip = identity__map_ip;
92 * Set memory without DSO as loaded. All map__find_*
93 * functions still return NULL, and we avoid the
94 * unnecessary map__load warning.
96 if (type != MAP__FUNCTION)
97 dso__set_loaded(dso, map->type);
107 * Constructor variant for modules (where we know from /proc/modules where
108 * they are loaded) and for vmlinux, where only after we load all the
109 * symbols we'll know where it starts and ends.
111 struct map *map__new2(u64 start, struct dso *dso, enum map_type type)
113 struct map *map = calloc(1, (sizeof(*map) +
114 (dso->kernel ? sizeof(struct kmap) : 0)));
117 * ->end will be filled after we load all the symbols
119 map__init(map, type, start, 0, 0, dso);
125 void map__delete(struct map *map)
130 void map__fixup_start(struct map *map)
132 struct rb_root *symbols = &map->dso->symbols[map->type];
133 struct rb_node *nd = rb_first(symbols);
135 struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
136 map->start = sym->start;
140 void map__fixup_end(struct map *map)
142 struct rb_root *symbols = &map->dso->symbols[map->type];
143 struct rb_node *nd = rb_last(symbols);
145 struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
150 #define DSO__DELETED "(deleted)"
152 int map__load(struct map *map, symbol_filter_t filter)
154 const char *name = map->dso->long_name;
157 if (dso__loaded(map->dso, map->type))
160 nr = dso__load(map->dso, map, filter);
162 if (map->dso->has_build_id) {
163 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
165 build_id__sprintf(map->dso->build_id,
166 sizeof(map->dso->build_id),
168 pr_warning("%s with build id %s not found",
171 pr_warning("Failed to open %s", name);
173 pr_warning(", continuing without symbols\n");
175 } else if (nr == 0) {
176 #ifdef HAVE_LIBELF_SUPPORT
177 const size_t len = strlen(name);
178 const size_t real_len = len - sizeof(DSO__DELETED);
180 if (len > sizeof(DSO__DELETED) &&
181 strcmp(name + real_len + 1, DSO__DELETED) == 0) {
182 pr_warning("%.*s was updated (is prelink enabled?). "
183 "Restart the long running apps that use it!\n",
184 (int)real_len, name);
186 pr_warning("no symbols found in %s, maybe install "
187 "a debug package?\n", name);
196 struct symbol *map__find_symbol(struct map *map, u64 addr,
197 symbol_filter_t filter)
199 if (map__load(map, filter) < 0)
202 return dso__find_symbol(map->dso, map->type, addr);
205 struct symbol *map__find_symbol_by_name(struct map *map, const char *name,
206 symbol_filter_t filter)
208 if (map__load(map, filter) < 0)
211 if (!dso__sorted_by_name(map->dso, map->type))
212 dso__sort_by_name(map->dso, map->type);
214 return dso__find_symbol_by_name(map->dso, map->type, name);
217 struct map *map__clone(struct map *map)
219 return memdup(map, sizeof(*map));
222 int map__overlap(struct map *l, struct map *r)
224 if (l->start > r->start) {
230 if (l->end > r->start)
236 size_t map__fprintf(struct map *map, FILE *fp)
238 return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %" PRIx64 " %s\n",
239 map->start, map->end, map->pgoff, map->dso->name);
242 size_t map__fprintf_dsoname(struct map *map, FILE *fp)
244 const char *dsoname = "[unknown]";
246 if (map && map->dso && (map->dso->name || map->dso->long_name)) {
247 if (symbol_conf.show_kernel_path && map->dso->long_name)
248 dsoname = map->dso->long_name;
249 else if (map->dso->name)
250 dsoname = map->dso->name;
253 return fprintf(fp, "%s", dsoname);
256 int map__fprintf_srcline(struct map *map, u64 addr, const char *prefix,
262 if (map && map->dso) {
263 srcline = get_srcline(map->dso,
264 map__rip_2objdump(map, addr));
265 if (srcline != SRCLINE_UNKNOWN)
266 ret = fprintf(fp, "%s%s", prefix, srcline);
267 free_srcline(srcline);
273 * map__rip_2objdump - convert symbol start address to objdump address.
275 * @rip: symbol start address
277 * objdump wants/reports absolute IPs for ET_EXEC, and RIPs for ET_DYN.
278 * map->dso->adjust_symbols==1 for ET_EXEC-like cases except ET_REL which is
279 * relative to section start.
281 * Return: Address suitable for passing to "objdump --start-address="
283 u64 map__rip_2objdump(struct map *map, u64 rip)
285 if (!map->dso->adjust_symbols)
289 return rip - map->pgoff;
291 return map->unmap_ip(map, rip);
295 * map__objdump_2mem - convert objdump address to a memory address.
297 * @ip: objdump address
299 * Closely related to map__rip_2objdump(), this function takes an address from
300 * objdump and converts it to a memory address. Note this assumes that @map
301 * contains the address. To be sure the result is valid, check it forwards
302 * e.g. map__rip_2objdump(map->map_ip(map, map__objdump_2mem(map, ip))) == ip
304 * Return: Memory address.
306 u64 map__objdump_2mem(struct map *map, u64 ip)
308 if (!map->dso->adjust_symbols)
309 return map->unmap_ip(map, ip);
312 return map->unmap_ip(map, ip + map->pgoff);
317 void map_groups__init(struct map_groups *mg)
320 for (i = 0; i < MAP__NR_TYPES; ++i) {
321 mg->maps[i] = RB_ROOT;
322 INIT_LIST_HEAD(&mg->removed_maps[i]);
327 static void maps__delete(struct rb_root *maps)
329 struct rb_node *next = rb_first(maps);
332 struct map *pos = rb_entry(next, struct map, rb_node);
334 next = rb_next(&pos->rb_node);
335 rb_erase(&pos->rb_node, maps);
340 static void maps__delete_removed(struct list_head *maps)
344 list_for_each_entry_safe(pos, n, maps, node) {
345 list_del(&pos->node);
350 void map_groups__exit(struct map_groups *mg)
354 for (i = 0; i < MAP__NR_TYPES; ++i) {
355 maps__delete(&mg->maps[i]);
356 maps__delete_removed(&mg->removed_maps[i]);
360 void map_groups__flush(struct map_groups *mg)
364 for (type = 0; type < MAP__NR_TYPES; type++) {
365 struct rb_root *root = &mg->maps[type];
366 struct rb_node *next = rb_first(root);
369 struct map *pos = rb_entry(next, struct map, rb_node);
370 next = rb_next(&pos->rb_node);
371 rb_erase(&pos->rb_node, root);
373 * We may have references to this map, for
374 * instance in some hist_entry instances, so
375 * just move them to a separate list.
377 list_add_tail(&pos->node, &mg->removed_maps[pos->type]);
382 struct symbol *map_groups__find_symbol(struct map_groups *mg,
383 enum map_type type, u64 addr,
385 symbol_filter_t filter)
387 struct map *map = map_groups__find(mg, type, addr);
389 /* Ensure map is loaded before using map->map_ip */
390 if (map != NULL && map__load(map, filter) >= 0) {
393 return map__find_symbol(map, map->map_ip(map, addr), filter);
399 struct symbol *map_groups__find_symbol_by_name(struct map_groups *mg,
403 symbol_filter_t filter)
407 for (nd = rb_first(&mg->maps[type]); nd; nd = rb_next(nd)) {
408 struct map *pos = rb_entry(nd, struct map, rb_node);
409 struct symbol *sym = map__find_symbol_by_name(pos, name, filter);
421 int map_groups__find_ams(struct addr_map_symbol *ams, symbol_filter_t filter)
423 if (ams->addr < ams->map->start || ams->addr > ams->map->end) {
424 if (ams->map->groups == NULL)
426 ams->map = map_groups__find(ams->map->groups, ams->map->type,
428 if (ams->map == NULL)
432 ams->al_addr = ams->map->map_ip(ams->map, ams->addr);
433 ams->sym = map__find_symbol(ams->map, ams->al_addr, filter);
435 return ams->sym ? 0 : -1;
438 size_t __map_groups__fprintf_maps(struct map_groups *mg,
439 enum map_type type, int verbose, FILE *fp)
441 size_t printed = fprintf(fp, "%s:\n", map_type__name[type]);
444 for (nd = rb_first(&mg->maps[type]); nd; nd = rb_next(nd)) {
445 struct map *pos = rb_entry(nd, struct map, rb_node);
446 printed += fprintf(fp, "Map:");
447 printed += map__fprintf(pos, fp);
449 printed += dso__fprintf(pos->dso, type, fp);
450 printed += fprintf(fp, "--\n");
457 size_t map_groups__fprintf_maps(struct map_groups *mg, int verbose, FILE *fp)
459 size_t printed = 0, i;
460 for (i = 0; i < MAP__NR_TYPES; ++i)
461 printed += __map_groups__fprintf_maps(mg, i, verbose, fp);
465 static size_t __map_groups__fprintf_removed_maps(struct map_groups *mg,
467 int verbose, FILE *fp)
472 list_for_each_entry(pos, &mg->removed_maps[type], node) {
473 printed += fprintf(fp, "Map:");
474 printed += map__fprintf(pos, fp);
476 printed += dso__fprintf(pos->dso, type, fp);
477 printed += fprintf(fp, "--\n");
483 static size_t map_groups__fprintf_removed_maps(struct map_groups *mg,
484 int verbose, FILE *fp)
486 size_t printed = 0, i;
487 for (i = 0; i < MAP__NR_TYPES; ++i)
488 printed += __map_groups__fprintf_removed_maps(mg, i, verbose, fp);
492 size_t map_groups__fprintf(struct map_groups *mg, int verbose, FILE *fp)
494 size_t printed = map_groups__fprintf_maps(mg, verbose, fp);
495 printed += fprintf(fp, "Removed maps:\n");
496 return printed + map_groups__fprintf_removed_maps(mg, verbose, fp);
499 int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map,
500 int verbose, FILE *fp)
502 struct rb_root *root = &mg->maps[map->type];
503 struct rb_node *next = rb_first(root);
507 struct map *pos = rb_entry(next, struct map, rb_node);
508 next = rb_next(&pos->rb_node);
510 if (!map__overlap(pos, map))
514 fputs("overlapping maps:\n", fp);
515 map__fprintf(map, fp);
516 map__fprintf(pos, fp);
519 rb_erase(&pos->rb_node, root);
521 * Now check if we need to create new maps for areas not
522 * overlapped by the new map:
524 if (map->start > pos->start) {
525 struct map *before = map__clone(pos);
527 if (before == NULL) {
532 before->end = map->start - 1;
533 map_groups__insert(mg, before);
535 map__fprintf(before, fp);
538 if (map->end < pos->end) {
539 struct map *after = map__clone(pos);
546 after->start = map->end + 1;
547 map_groups__insert(mg, after);
549 map__fprintf(after, fp);
553 * If we have references, just move them to a separate list.
556 list_add_tail(&pos->node, &mg->removed_maps[map->type]);
568 * XXX This should not really _copy_ te maps, but refcount them.
570 int map_groups__clone(struct map_groups *mg,
571 struct map_groups *parent, enum map_type type)
574 for (nd = rb_first(&parent->maps[type]); nd; nd = rb_next(nd)) {
575 struct map *map = rb_entry(nd, struct map, rb_node);
576 struct map *new = map__clone(map);
579 map_groups__insert(mg, new);
584 void maps__insert(struct rb_root *maps, struct map *map)
586 struct rb_node **p = &maps->rb_node;
587 struct rb_node *parent = NULL;
588 const u64 ip = map->start;
593 m = rb_entry(parent, struct map, rb_node);
600 rb_link_node(&map->rb_node, parent, p);
601 rb_insert_color(&map->rb_node, maps);
604 void maps__remove(struct rb_root *maps, struct map *map)
606 rb_erase(&map->rb_node, maps);
609 struct map *maps__find(struct rb_root *maps, u64 ip)
611 struct rb_node **p = &maps->rb_node;
612 struct rb_node *parent = NULL;
617 m = rb_entry(parent, struct map, rb_node);
620 else if (ip > m->end)
629 struct map *maps__first(struct rb_root *maps)
631 struct rb_node *first = rb_first(maps);
634 return rb_entry(first, struct map, rb_node);
638 struct map *maps__next(struct map *map)
640 struct rb_node *next = rb_next(&map->rb_node);
643 return rb_entry(next, struct map, rb_node);