6 #include <linux/kernel.h>
23 #include "sane_ctype.h"
27 #include <symbol/kallsyms.h>
28 #include <sys/utsname.h>
30 static int dso__load_kernel_sym(struct dso *dso, struct map *map);
31 static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map);
32 static bool symbol__is_idle(const char *name);
34 int vmlinux_path__nr_entries;
37 struct symbol_conf symbol_conf = {
39 .try_vmlinux_path = true,
42 .demangle_kernel = false,
43 .cumulate_callchain = true,
44 .show_hist_headers = true,
49 static enum dso_binary_type binary_type_symtab[] = {
50 DSO_BINARY_TYPE__KALLSYMS,
51 DSO_BINARY_TYPE__GUEST_KALLSYMS,
52 DSO_BINARY_TYPE__JAVA_JIT,
53 DSO_BINARY_TYPE__DEBUGLINK,
54 DSO_BINARY_TYPE__BUILD_ID_CACHE,
55 DSO_BINARY_TYPE__FEDORA_DEBUGINFO,
56 DSO_BINARY_TYPE__UBUNTU_DEBUGINFO,
57 DSO_BINARY_TYPE__BUILDID_DEBUGINFO,
58 DSO_BINARY_TYPE__SYSTEM_PATH_DSO,
59 DSO_BINARY_TYPE__GUEST_KMODULE,
60 DSO_BINARY_TYPE__GUEST_KMODULE_COMP,
61 DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE,
62 DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP,
63 DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO,
64 DSO_BINARY_TYPE__NOT_FOUND,
67 #define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab)
69 bool symbol_type__is_a(char symbol_type, enum map_type map_type)
71 symbol_type = toupper(symbol_type);
75 return symbol_type == 'T' || symbol_type == 'W';
77 return symbol_type == 'D';
83 static int prefix_underscores_count(const char *str)
85 const char *tail = str;
93 int __weak arch__compare_symbol_names(const char *namea, const char *nameb)
95 return strcmp(namea, nameb);
98 int __weak arch__compare_symbol_names_n(const char *namea, const char *nameb,
101 return strncmp(namea, nameb, n);
104 int __weak arch__choose_best_symbol(struct symbol *syma,
105 struct symbol *symb __maybe_unused)
107 /* Avoid "SyS" kernel syscall aliases */
108 if (strlen(syma->name) >= 3 && !strncmp(syma->name, "SyS", 3))
110 if (strlen(syma->name) >= 10 && !strncmp(syma->name, "compat_SyS", 10))
116 static int choose_best_symbol(struct symbol *syma, struct symbol *symb)
122 /* Prefer a symbol with non zero length */
123 a = syma->end - syma->start;
124 b = symb->end - symb->start;
125 if ((b == 0) && (a > 0))
127 else if ((a == 0) && (b > 0))
130 /* Prefer a non weak symbol over a weak one */
131 a = syma->binding == STB_WEAK;
132 b = symb->binding == STB_WEAK;
138 /* Prefer a global symbol over a non global one */
139 a = syma->binding == STB_GLOBAL;
140 b = symb->binding == STB_GLOBAL;
146 /* Prefer a symbol with less underscores */
147 a = prefix_underscores_count(syma->name);
148 b = prefix_underscores_count(symb->name);
154 /* Choose the symbol with the longest name */
155 na = strlen(syma->name);
156 nb = strlen(symb->name);
162 return arch__choose_best_symbol(syma, symb);
165 void symbols__fixup_duplicate(struct rb_root *symbols)
168 struct symbol *curr, *next;
170 if (symbol_conf.allow_aliases)
173 nd = rb_first(symbols);
176 curr = rb_entry(nd, struct symbol, rb_node);
178 nd = rb_next(&curr->rb_node);
179 next = rb_entry(nd, struct symbol, rb_node);
184 if (curr->start != next->start)
187 if (choose_best_symbol(curr, next) == SYMBOL_A) {
188 rb_erase(&next->rb_node, symbols);
189 symbol__delete(next);
192 nd = rb_next(&curr->rb_node);
193 rb_erase(&curr->rb_node, symbols);
194 symbol__delete(curr);
199 void symbols__fixup_end(struct rb_root *symbols)
201 struct rb_node *nd, *prevnd = rb_first(symbols);
202 struct symbol *curr, *prev;
207 curr = rb_entry(prevnd, struct symbol, rb_node);
209 for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
211 curr = rb_entry(nd, struct symbol, rb_node);
213 if (prev->end == prev->start && prev->end != curr->start)
214 prev->end = curr->start;
218 if (curr->end == curr->start)
219 curr->end = roundup(curr->start, 4096) + 4096;
222 void __map_groups__fixup_end(struct map_groups *mg, enum map_type type)
224 struct maps *maps = &mg->maps[type];
225 struct map *next, *curr;
227 pthread_rwlock_wrlock(&maps->lock);
229 curr = maps__first(maps);
233 for (next = map__next(curr); next; next = map__next(curr)) {
234 curr->end = next->start;
239 * We still haven't the actual symbols, so guess the
240 * last map final address.
245 pthread_rwlock_unlock(&maps->lock);
248 struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name)
250 size_t namelen = strlen(name) + 1;
251 struct symbol *sym = calloc(1, (symbol_conf.priv_size +
252 sizeof(*sym) + namelen));
256 if (symbol_conf.priv_size) {
257 if (symbol_conf.init_annotation) {
258 struct annotation *notes = (void *)sym;
259 pthread_mutex_init(¬es->lock, NULL);
261 sym = ((void *)sym) + symbol_conf.priv_size;
265 sym->end = len ? start + len : start;
266 sym->binding = binding;
267 sym->namelen = namelen - 1;
269 pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n",
270 __func__, name, start, sym->end);
271 memcpy(sym->name, name, namelen);
276 void symbol__delete(struct symbol *sym)
278 free(((void *)sym) - symbol_conf.priv_size);
281 void symbols__delete(struct rb_root *symbols)
284 struct rb_node *next = rb_first(symbols);
287 pos = rb_entry(next, struct symbol, rb_node);
288 next = rb_next(&pos->rb_node);
289 rb_erase(&pos->rb_node, symbols);
294 void __symbols__insert(struct rb_root *symbols, struct symbol *sym, bool kernel)
296 struct rb_node **p = &symbols->rb_node;
297 struct rb_node *parent = NULL;
298 const u64 ip = sym->start;
302 const char *name = sym->name;
304 * ppc64 uses function descriptors and appends a '.' to the
305 * start of every instruction address. Remove it.
309 sym->idle = symbol__is_idle(name);
314 s = rb_entry(parent, struct symbol, rb_node);
320 rb_link_node(&sym->rb_node, parent, p);
321 rb_insert_color(&sym->rb_node, symbols);
324 void symbols__insert(struct rb_root *symbols, struct symbol *sym)
326 __symbols__insert(symbols, sym, false);
329 static struct symbol *symbols__find(struct rb_root *symbols, u64 ip)
336 n = symbols->rb_node;
339 struct symbol *s = rb_entry(n, struct symbol, rb_node);
343 else if (ip > s->end || (ip == s->end && ip != s->start))
352 static struct symbol *symbols__first(struct rb_root *symbols)
354 struct rb_node *n = rb_first(symbols);
357 return rb_entry(n, struct symbol, rb_node);
362 static struct symbol *symbols__last(struct rb_root *symbols)
364 struct rb_node *n = rb_last(symbols);
367 return rb_entry(n, struct symbol, rb_node);
372 static struct symbol *symbols__next(struct symbol *sym)
374 struct rb_node *n = rb_next(&sym->rb_node);
377 return rb_entry(n, struct symbol, rb_node);
382 static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym)
384 struct rb_node **p = &symbols->rb_node;
385 struct rb_node *parent = NULL;
386 struct symbol_name_rb_node *symn, *s;
388 symn = container_of(sym, struct symbol_name_rb_node, sym);
392 s = rb_entry(parent, struct symbol_name_rb_node, rb_node);
393 if (strcmp(sym->name, s->sym.name) < 0)
398 rb_link_node(&symn->rb_node, parent, p);
399 rb_insert_color(&symn->rb_node, symbols);
402 static void symbols__sort_by_name(struct rb_root *symbols,
403 struct rb_root *source)
407 for (nd = rb_first(source); nd; nd = rb_next(nd)) {
408 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
409 symbols__insert_by_name(symbols, pos);
413 int symbol__match_symbol_name(const char *name, const char *str,
414 enum symbol_tag_include includes)
416 const char *versioning;
418 if (includes == SYMBOL_TAG_INCLUDE__DEFAULT_ONLY &&
419 (versioning = strstr(name, "@@"))) {
420 int len = strlen(str);
422 if (len < versioning - name)
423 len = versioning - name;
425 return arch__compare_symbol_names_n(name, str, len);
427 return arch__compare_symbol_names(name, str);
430 static struct symbol *symbols__find_by_name(struct rb_root *symbols,
432 enum symbol_tag_include includes)
435 struct symbol_name_rb_node *s = NULL;
440 n = symbols->rb_node;
445 s = rb_entry(n, struct symbol_name_rb_node, rb_node);
446 cmp = symbol__match_symbol_name(s->sym.name, name, includes);
459 if (includes != SYMBOL_TAG_INCLUDE__DEFAULT_ONLY)
460 /* return first symbol that has same name (if any) */
461 for (n = rb_prev(n); n; n = rb_prev(n)) {
462 struct symbol_name_rb_node *tmp;
464 tmp = rb_entry(n, struct symbol_name_rb_node, rb_node);
465 if (arch__compare_symbol_names(tmp->sym.name, s->sym.name))
474 void dso__reset_find_symbol_cache(struct dso *dso)
478 for (type = MAP__FUNCTION; type <= MAP__VARIABLE; ++type) {
479 dso->last_find_result[type].addr = 0;
480 dso->last_find_result[type].symbol = NULL;
484 void dso__insert_symbol(struct dso *dso, enum map_type type, struct symbol *sym)
486 __symbols__insert(&dso->symbols[type], sym, dso->kernel);
488 /* update the symbol cache if necessary */
489 if (dso->last_find_result[type].addr >= sym->start &&
490 (dso->last_find_result[type].addr < sym->end ||
491 sym->start == sym->end)) {
492 dso->last_find_result[type].symbol = sym;
496 struct symbol *dso__find_symbol(struct dso *dso,
497 enum map_type type, u64 addr)
499 if (dso->last_find_result[type].addr != addr || dso->last_find_result[type].symbol == NULL) {
500 dso->last_find_result[type].addr = addr;
501 dso->last_find_result[type].symbol = symbols__find(&dso->symbols[type], addr);
504 return dso->last_find_result[type].symbol;
507 struct symbol *dso__first_symbol(struct dso *dso, enum map_type type)
509 return symbols__first(&dso->symbols[type]);
512 struct symbol *dso__last_symbol(struct dso *dso, enum map_type type)
514 return symbols__last(&dso->symbols[type]);
517 struct symbol *dso__next_symbol(struct symbol *sym)
519 return symbols__next(sym);
522 struct symbol *symbol__next_by_name(struct symbol *sym)
524 struct symbol_name_rb_node *s = container_of(sym, struct symbol_name_rb_node, sym);
525 struct rb_node *n = rb_next(&s->rb_node);
527 return n ? &rb_entry(n, struct symbol_name_rb_node, rb_node)->sym : NULL;
531 * Teturns first symbol that matched with @name.
533 struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type,
536 struct symbol *s = symbols__find_by_name(&dso->symbol_names[type], name,
537 SYMBOL_TAG_INCLUDE__NONE);
539 s = symbols__find_by_name(&dso->symbol_names[type], name,
540 SYMBOL_TAG_INCLUDE__DEFAULT_ONLY);
544 void dso__sort_by_name(struct dso *dso, enum map_type type)
546 dso__set_sorted_by_name(dso, type);
547 return symbols__sort_by_name(&dso->symbol_names[type],
548 &dso->symbols[type]);
551 int modules__parse(const char *filename, void *arg,
552 int (*process_module)(void *arg, const char *name,
560 file = fopen(filename, "r");
570 line_len = getline(&line, &n, file);
583 line[--line_len] = '\0'; /* \n */
585 sep = strrchr(line, 'x');
589 hex2u64(sep + 1, &start);
591 sep = strchr(line, ' ');
597 scnprintf(name, sizeof(name), "[%s]", line);
599 err = process_module(arg, name, start);
609 struct process_kallsyms_args {
615 * These are symbols in the kernel image, so make sure that
616 * sym is from a kernel DSO.
618 static bool symbol__is_idle(const char *name)
620 const char * const idle_symbols[] = {
629 "mwait_idle_with_hints",
631 "ppc64_runlatch_off",
632 "pseries_dedicated_idle_sleep",
637 for (i = 0; idle_symbols[i]; i++) {
638 if (!strcmp(idle_symbols[i], name))
645 static int map__process_kallsym_symbol(void *arg, const char *name,
646 char type, u64 start)
649 struct process_kallsyms_args *a = arg;
650 struct rb_root *root = &a->dso->symbols[a->map->type];
652 if (!symbol_type__is_a(type, a->map->type))
656 * module symbols are not sorted so we add all
657 * symbols, setting length to 0, and rely on
658 * symbols__fixup_end() to fix it up.
660 sym = symbol__new(start, 0, kallsyms2elf_binding(type), name);
664 * We will pass the symbols to the filter later, in
665 * map__split_kallsyms, when we have split the maps per module
667 __symbols__insert(root, sym, !strchr(name, '['));
673 * Loads the function entries in /proc/kallsyms into kernel_map->dso,
674 * so that we can in the next step set the symbol ->end address and then
675 * call kernel_maps__split_kallsyms.
677 static int dso__load_all_kallsyms(struct dso *dso, const char *filename,
680 struct process_kallsyms_args args = { .map = map, .dso = dso, };
681 return kallsyms__parse(filename, &args, map__process_kallsym_symbol);
684 static int dso__split_kallsyms_for_kcore(struct dso *dso, struct map *map)
686 struct map_groups *kmaps = map__kmaps(map);
687 struct map *curr_map;
690 struct rb_root old_root = dso->symbols[map->type];
691 struct rb_root *root = &dso->symbols[map->type];
692 struct rb_node *next = rb_first(root);
702 pos = rb_entry(next, struct symbol, rb_node);
703 next = rb_next(&pos->rb_node);
705 rb_erase_init(&pos->rb_node, &old_root);
707 module = strchr(pos->name, '\t');
711 curr_map = map_groups__find(kmaps, map->type, pos->start);
718 pos->start -= curr_map->start - curr_map->pgoff;
720 pos->end -= curr_map->start - curr_map->pgoff;
721 symbols__insert(&curr_map->dso->symbols[curr_map->type], pos);
725 /* Symbols have been adjusted */
726 dso->adjust_symbols = 1;
732 * Split the symbols into maps, making sure there are no overlaps, i.e. the
733 * kernel range is broken in several maps, named [kernel].N, as we don't have
734 * the original ELF section names vmlinux have.
736 static int dso__split_kallsyms(struct dso *dso, struct map *map, u64 delta)
738 struct map_groups *kmaps = map__kmaps(map);
739 struct machine *machine;
740 struct map *curr_map = map;
742 int count = 0, moved = 0;
743 struct rb_root *root = &dso->symbols[map->type];
744 struct rb_node *next = rb_first(root);
745 int kernel_range = 0;
750 machine = kmaps->machine;
755 pos = rb_entry(next, struct symbol, rb_node);
756 next = rb_next(&pos->rb_node);
758 module = strchr(pos->name, '\t');
760 if (!symbol_conf.use_modules)
765 if (strcmp(curr_map->dso->short_name, module)) {
766 if (curr_map != map &&
767 dso->kernel == DSO_TYPE_GUEST_KERNEL &&
768 machine__is_default_guest(machine)) {
770 * We assume all symbols of a module are
771 * continuous in * kallsyms, so curr_map
772 * points to a module and all its
773 * symbols are in its kmap. Mark it as
776 dso__set_loaded(curr_map->dso,
780 curr_map = map_groups__find_by_name(kmaps,
782 if (curr_map == NULL) {
783 pr_debug("%s/proc/{kallsyms,modules} "
784 "inconsistency while looking "
785 "for \"%s\" module!\n",
786 machine->root_dir, module);
791 if (curr_map->dso->loaded &&
792 !machine__is_default_guest(machine))
796 * So that we look just like we get from .ko files,
797 * i.e. not prelinked, relative to map->start.
799 pos->start = curr_map->map_ip(curr_map, pos->start);
800 pos->end = curr_map->map_ip(curr_map, pos->end);
801 } else if (curr_map != map) {
802 char dso_name[PATH_MAX];
806 /* Kernel was relocated at boot time */
816 if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
817 snprintf(dso_name, sizeof(dso_name),
821 snprintf(dso_name, sizeof(dso_name),
825 ndso = dso__new(dso_name);
829 ndso->kernel = dso->kernel;
831 curr_map = map__new2(pos->start, ndso, map->type);
832 if (curr_map == NULL) {
837 curr_map->map_ip = curr_map->unmap_ip = identity__map_ip;
838 map_groups__insert(kmaps, curr_map);
841 /* Kernel was relocated at boot time */
846 if (curr_map != map) {
847 rb_erase(&pos->rb_node, root);
848 symbols__insert(&curr_map->dso->symbols[curr_map->type], pos);
855 rb_erase(&pos->rb_node, root);
859 if (curr_map != map &&
860 dso->kernel == DSO_TYPE_GUEST_KERNEL &&
861 machine__is_default_guest(kmaps->machine)) {
862 dso__set_loaded(curr_map->dso, curr_map->type);
865 return count + moved;
868 bool symbol__restricted_filename(const char *filename,
869 const char *restricted_filename)
871 bool restricted = false;
873 if (symbol_conf.kptr_restrict) {
874 char *r = realpath(filename, NULL);
877 restricted = strcmp(r, restricted_filename) == 0;
887 struct rb_node rb_node;
892 static void add_module(struct module_info *mi, struct rb_root *modules)
894 struct rb_node **p = &modules->rb_node;
895 struct rb_node *parent = NULL;
896 struct module_info *m;
900 m = rb_entry(parent, struct module_info, rb_node);
901 if (strcmp(mi->name, m->name) < 0)
906 rb_link_node(&mi->rb_node, parent, p);
907 rb_insert_color(&mi->rb_node, modules);
910 static void delete_modules(struct rb_root *modules)
912 struct module_info *mi;
913 struct rb_node *next = rb_first(modules);
916 mi = rb_entry(next, struct module_info, rb_node);
917 next = rb_next(&mi->rb_node);
918 rb_erase(&mi->rb_node, modules);
924 static struct module_info *find_module(const char *name,
925 struct rb_root *modules)
927 struct rb_node *n = modules->rb_node;
930 struct module_info *m;
933 m = rb_entry(n, struct module_info, rb_node);
934 cmp = strcmp(name, m->name);
946 static int __read_proc_modules(void *arg, const char *name, u64 start)
948 struct rb_root *modules = arg;
949 struct module_info *mi;
951 mi = zalloc(sizeof(struct module_info));
955 mi->name = strdup(name);
963 add_module(mi, modules);
968 static int read_proc_modules(const char *filename, struct rb_root *modules)
970 if (symbol__restricted_filename(filename, "/proc/modules"))
973 if (modules__parse(filename, modules, __read_proc_modules)) {
974 delete_modules(modules);
981 int compare_proc_modules(const char *from, const char *to)
983 struct rb_root from_modules = RB_ROOT;
984 struct rb_root to_modules = RB_ROOT;
985 struct rb_node *from_node, *to_node;
986 struct module_info *from_m, *to_m;
989 if (read_proc_modules(from, &from_modules))
992 if (read_proc_modules(to, &to_modules))
993 goto out_delete_from;
995 from_node = rb_first(&from_modules);
996 to_node = rb_first(&to_modules);
1001 from_m = rb_entry(from_node, struct module_info, rb_node);
1002 to_m = rb_entry(to_node, struct module_info, rb_node);
1004 if (from_m->start != to_m->start ||
1005 strcmp(from_m->name, to_m->name))
1008 from_node = rb_next(from_node);
1009 to_node = rb_next(to_node);
1012 if (!from_node && !to_node)
1015 delete_modules(&to_modules);
1017 delete_modules(&from_modules);
1022 static int do_validate_kcore_modules(const char *filename, struct map *map,
1023 struct map_groups *kmaps)
1025 struct rb_root modules = RB_ROOT;
1026 struct map *old_map;
1029 err = read_proc_modules(filename, &modules);
1033 old_map = map_groups__first(kmaps, map->type);
1035 struct map *next = map_groups__next(old_map);
1036 struct module_info *mi;
1038 if (old_map == map || old_map->start == map->start) {
1039 /* The kernel map */
1044 /* Module must be in memory at the same address */
1045 mi = find_module(old_map->dso->short_name, &modules);
1046 if (!mi || mi->start != old_map->start) {
1054 delete_modules(&modules);
1059 * If kallsyms is referenced by name then we look for filename in the same
1062 static bool filename_from_kallsyms_filename(char *filename,
1063 const char *base_name,
1064 const char *kallsyms_filename)
1068 strcpy(filename, kallsyms_filename);
1069 name = strrchr(filename, '/');
1075 if (!strcmp(name, "kallsyms")) {
1076 strcpy(name, base_name);
1083 static int validate_kcore_modules(const char *kallsyms_filename,
1086 struct map_groups *kmaps = map__kmaps(map);
1087 char modules_filename[PATH_MAX];
1092 if (!filename_from_kallsyms_filename(modules_filename, "modules",
1096 if (do_validate_kcore_modules(modules_filename, map, kmaps))
1102 static int validate_kcore_addresses(const char *kallsyms_filename,
1105 struct kmap *kmap = map__kmap(map);
1110 if (kmap->ref_reloc_sym && kmap->ref_reloc_sym->name) {
1113 if (kallsyms__get_function_start(kallsyms_filename,
1114 kmap->ref_reloc_sym->name, &start))
1116 if (start != kmap->ref_reloc_sym->addr)
1120 return validate_kcore_modules(kallsyms_filename, map);
1123 struct kcore_mapfn_data {
1126 struct list_head maps;
1129 static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data)
1131 struct kcore_mapfn_data *md = data;
1134 map = map__new2(start, md->dso, md->type);
1138 map->end = map->start + len;
1141 list_add(&map->node, &md->maps);
1146 static int dso__load_kcore(struct dso *dso, struct map *map,
1147 const char *kallsyms_filename)
1149 struct map_groups *kmaps = map__kmaps(map);
1150 struct machine *machine;
1151 struct kcore_mapfn_data md;
1152 struct map *old_map, *new_map, *replacement_map = NULL;
1155 char kcore_filename[PATH_MAX];
1161 machine = kmaps->machine;
1163 /* This function requires that the map is the kernel map */
1164 if (map != machine->vmlinux_maps[map->type])
1167 if (!filename_from_kallsyms_filename(kcore_filename, "kcore",
1171 /* Modules and kernel must be present at their original addresses */
1172 if (validate_kcore_addresses(kallsyms_filename, map))
1176 md.type = map->type;
1177 INIT_LIST_HEAD(&md.maps);
1179 fd = open(kcore_filename, O_RDONLY);
1181 pr_debug("Failed to open %s. Note /proc/kcore requires CAP_SYS_RAWIO capability to access.\n",
1186 /* Read new maps into temporary lists */
1187 err = file__read_maps(fd, md.type == MAP__FUNCTION, kcore_mapfn, &md,
1191 dso->is_64_bit = is_64_bit;
1193 if (list_empty(&md.maps)) {
1198 /* Remove old maps */
1199 old_map = map_groups__first(kmaps, map->type);
1201 struct map *next = map_groups__next(old_map);
1204 map_groups__remove(kmaps, old_map);
1208 /* Find the kernel map using the first symbol */
1209 sym = dso__first_symbol(dso, map->type);
1210 list_for_each_entry(new_map, &md.maps, node) {
1211 if (sym && sym->start >= new_map->start &&
1212 sym->start < new_map->end) {
1213 replacement_map = new_map;
1218 if (!replacement_map)
1219 replacement_map = list_entry(md.maps.next, struct map, node);
1222 while (!list_empty(&md.maps)) {
1223 new_map = list_entry(md.maps.next, struct map, node);
1224 list_del_init(&new_map->node);
1225 if (new_map == replacement_map) {
1226 map->start = new_map->start;
1227 map->end = new_map->end;
1228 map->pgoff = new_map->pgoff;
1229 map->map_ip = new_map->map_ip;
1230 map->unmap_ip = new_map->unmap_ip;
1231 /* Ensure maps are correctly ordered */
1233 map_groups__remove(kmaps, map);
1234 map_groups__insert(kmaps, map);
1237 map_groups__insert(kmaps, new_map);
1244 * Set the data type and long name so that kcore can be read via
1245 * dso__data_read_addr().
1247 if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
1248 dso->binary_type = DSO_BINARY_TYPE__GUEST_KCORE;
1250 dso->binary_type = DSO_BINARY_TYPE__KCORE;
1251 dso__set_long_name(dso, strdup(kcore_filename), true);
1255 if (map->type == MAP__FUNCTION)
1256 pr_debug("Using %s for kernel object code\n", kcore_filename);
1258 pr_debug("Using %s for kernel data\n", kcore_filename);
1263 while (!list_empty(&md.maps)) {
1264 map = list_entry(md.maps.next, struct map, node);
1265 list_del_init(&map->node);
1273 * If the kernel is relocated at boot time, kallsyms won't match. Compute the
1274 * delta based on the relocation reference symbol.
1276 static int kallsyms__delta(struct map *map, const char *filename, u64 *delta)
1278 struct kmap *kmap = map__kmap(map);
1284 if (!kmap->ref_reloc_sym || !kmap->ref_reloc_sym->name)
1287 if (kallsyms__get_function_start(filename, kmap->ref_reloc_sym->name, &addr))
1290 *delta = addr - kmap->ref_reloc_sym->addr;
1294 int __dso__load_kallsyms(struct dso *dso, const char *filename,
1295 struct map *map, bool no_kcore)
1299 if (symbol__restricted_filename(filename, "/proc/kallsyms"))
1302 if (dso__load_all_kallsyms(dso, filename, map) < 0)
1305 if (kallsyms__delta(map, filename, &delta))
1308 symbols__fixup_end(&dso->symbols[map->type]);
1309 symbols__fixup_duplicate(&dso->symbols[map->type]);
1311 if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
1312 dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS;
1314 dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS;
1316 if (!no_kcore && !dso__load_kcore(dso, map, filename))
1317 return dso__split_kallsyms_for_kcore(dso, map);
1319 return dso__split_kallsyms(dso, map, delta);
1322 int dso__load_kallsyms(struct dso *dso, const char *filename,
1325 return __dso__load_kallsyms(dso, filename, map, false);
1328 static int dso__load_perf_map(struct dso *dso, struct map *map)
1335 file = fopen(dso->long_name, "r");
1339 while (!feof(file)) {
1344 line_len = getline(&line, &n, file);
1351 line[--line_len] = '\0'; /* \n */
1353 len = hex2u64(line, &start);
1356 if (len + 2 >= line_len)
1359 len += hex2u64(line + len, &size);
1362 if (len + 2 >= line_len)
1365 sym = symbol__new(start, size, STB_GLOBAL, line + len);
1368 goto out_delete_line;
1370 symbols__insert(&dso->symbols[map->type], sym);
1385 static bool dso__is_compatible_symtab_type(struct dso *dso, bool kmod,
1386 enum dso_binary_type type)
1389 case DSO_BINARY_TYPE__JAVA_JIT:
1390 case DSO_BINARY_TYPE__DEBUGLINK:
1391 case DSO_BINARY_TYPE__SYSTEM_PATH_DSO:
1392 case DSO_BINARY_TYPE__FEDORA_DEBUGINFO:
1393 case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO:
1394 case DSO_BINARY_TYPE__BUILDID_DEBUGINFO:
1395 case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO:
1396 return !kmod && dso->kernel == DSO_TYPE_USER;
1398 case DSO_BINARY_TYPE__KALLSYMS:
1399 case DSO_BINARY_TYPE__VMLINUX:
1400 case DSO_BINARY_TYPE__KCORE:
1401 return dso->kernel == DSO_TYPE_KERNEL;
1403 case DSO_BINARY_TYPE__GUEST_KALLSYMS:
1404 case DSO_BINARY_TYPE__GUEST_VMLINUX:
1405 case DSO_BINARY_TYPE__GUEST_KCORE:
1406 return dso->kernel == DSO_TYPE_GUEST_KERNEL;
1408 case DSO_BINARY_TYPE__GUEST_KMODULE:
1409 case DSO_BINARY_TYPE__GUEST_KMODULE_COMP:
1410 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE:
1411 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP:
1413 * kernel modules know their symtab type - it's set when
1414 * creating a module dso in machine__findnew_module_map().
1416 return kmod && dso->symtab_type == type;
1418 case DSO_BINARY_TYPE__BUILD_ID_CACHE:
1421 case DSO_BINARY_TYPE__NOT_FOUND:
1427 int dso__load(struct dso *dso, struct map *map)
1432 struct machine *machine;
1433 char *root_dir = (char *) "";
1435 struct symsrc ss_[2];
1436 struct symsrc *syms_ss = NULL, *runtime_ss = NULL;
1438 unsigned char build_id[BUILD_ID_SIZE];
1440 pthread_mutex_lock(&dso->lock);
1442 /* check again under the dso->lock */
1443 if (dso__loaded(dso, map->type)) {
1449 if (dso->kernel == DSO_TYPE_KERNEL)
1450 ret = dso__load_kernel_sym(dso, map);
1451 else if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
1452 ret = dso__load_guest_kernel_sym(dso, map);
1457 if (map->groups && map->groups->machine)
1458 machine = map->groups->machine;
1462 dso->adjust_symbols = 0;
1464 if (strncmp(dso->name, "/tmp/perf-", 10) == 0) {
1467 if (lstat(dso->name, &st) < 0)
1470 if (!symbol_conf.force && st.st_uid && (st.st_uid != geteuid())) {
1471 pr_warning("File %s not owned by current user or root, "
1472 "ignoring it (use -f to override).\n", dso->name);
1476 ret = dso__load_perf_map(dso, map);
1477 dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT :
1478 DSO_BINARY_TYPE__NOT_FOUND;
1483 root_dir = machine->root_dir;
1485 name = malloc(PATH_MAX);
1489 kmod = dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE ||
1490 dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP ||
1491 dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE ||
1492 dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP;
1496 * Read the build id if possible. This is required for
1497 * DSO_BINARY_TYPE__BUILDID_DEBUGINFO to work
1499 if (!dso->has_build_id &&
1500 is_regular_file(dso->long_name)) {
1501 __symbol__join_symfs(name, PATH_MAX, dso->long_name);
1502 if (filename__read_build_id(name, build_id, BUILD_ID_SIZE) > 0)
1503 dso__set_build_id(dso, build_id);
1507 * Iterate over candidate debug images.
1508 * Keep track of "interesting" ones (those which have a symtab, dynsym,
1509 * and/or opd section) for processing.
1511 for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) {
1512 struct symsrc *ss = &ss_[ss_pos];
1513 bool next_slot = false;
1515 enum dso_binary_type symtab_type = binary_type_symtab[i];
1517 if (!dso__is_compatible_symtab_type(dso, kmod, symtab_type))
1520 if (dso__read_binary_type_filename(dso, symtab_type,
1521 root_dir, name, PATH_MAX))
1524 if (!is_regular_file(name))
1527 /* Name is now the name of the next image to try */
1528 if (symsrc__init(ss, dso, name, symtab_type) < 0)
1531 if (!syms_ss && symsrc__has_symtab(ss)) {
1534 if (!dso->symsrc_filename)
1535 dso->symsrc_filename = strdup(name);
1538 if (!runtime_ss && symsrc__possibly_runtime(ss)) {
1546 if (syms_ss && runtime_ss)
1549 symsrc__destroy(ss);
1554 if (!runtime_ss && !syms_ss)
1557 if (runtime_ss && !syms_ss) {
1558 syms_ss = runtime_ss;
1561 /* We'll have to hope for the best */
1562 if (!runtime_ss && syms_ss)
1563 runtime_ss = syms_ss;
1566 ret = dso__load_sym(dso, map, syms_ss, runtime_ss, kmod);
1573 nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss, map);
1578 for (; ss_pos > 0; ss_pos--)
1579 symsrc__destroy(&ss_[ss_pos - 1]);
1582 if (ret < 0 && strstr(dso->name, " (deleted)") != NULL)
1585 dso__set_loaded(dso, map->type);
1586 pthread_mutex_unlock(&dso->lock);
1591 struct map *map_groups__find_by_name(struct map_groups *mg,
1592 enum map_type type, const char *name)
1594 struct maps *maps = &mg->maps[type];
1597 pthread_rwlock_rdlock(&maps->lock);
1599 for (map = maps__first(maps); map; map = map__next(map)) {
1600 if (map->dso && strcmp(map->dso->short_name, name) == 0)
1607 pthread_rwlock_unlock(&maps->lock);
1611 int dso__load_vmlinux(struct dso *dso, struct map *map,
1612 const char *vmlinux, bool vmlinux_allocated)
1616 char symfs_vmlinux[PATH_MAX];
1617 enum dso_binary_type symtab_type;
1619 if (vmlinux[0] == '/')
1620 snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux);
1622 symbol__join_symfs(symfs_vmlinux, vmlinux);
1624 if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
1625 symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX;
1627 symtab_type = DSO_BINARY_TYPE__VMLINUX;
1629 if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type))
1632 err = dso__load_sym(dso, map, &ss, &ss, 0);
1633 symsrc__destroy(&ss);
1636 if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
1637 dso->binary_type = DSO_BINARY_TYPE__GUEST_VMLINUX;
1639 dso->binary_type = DSO_BINARY_TYPE__VMLINUX;
1640 dso__set_long_name(dso, vmlinux, vmlinux_allocated);
1641 dso__set_loaded(dso, map->type);
1642 pr_debug("Using %s for symbols\n", symfs_vmlinux);
1648 int dso__load_vmlinux_path(struct dso *dso, struct map *map)
1651 char *filename = NULL;
1653 pr_debug("Looking at the vmlinux_path (%d entries long)\n",
1654 vmlinux_path__nr_entries + 1);
1656 for (i = 0; i < vmlinux_path__nr_entries; ++i) {
1657 err = dso__load_vmlinux(dso, map, vmlinux_path[i], false);
1662 if (!symbol_conf.ignore_vmlinux_buildid)
1663 filename = dso__build_id_filename(dso, NULL, 0);
1664 if (filename != NULL) {
1665 err = dso__load_vmlinux(dso, map, filename, true);
1674 static bool visible_dir_filter(const char *name, struct dirent *d)
1676 if (d->d_type != DT_DIR)
1678 return lsdir_no_dot_filter(name, d);
1681 static int find_matching_kcore(struct map *map, char *dir, size_t dir_sz)
1683 char kallsyms_filename[PATH_MAX];
1685 struct strlist *dirs;
1686 struct str_node *nd;
1688 dirs = lsdir(dir, visible_dir_filter);
1692 strlist__for_each_entry(nd, dirs) {
1693 scnprintf(kallsyms_filename, sizeof(kallsyms_filename),
1694 "%s/%s/kallsyms", dir, nd->s);
1695 if (!validate_kcore_addresses(kallsyms_filename, map)) {
1696 strlcpy(dir, kallsyms_filename, dir_sz);
1702 strlist__delete(dirs);
1708 * Use open(O_RDONLY) to check readability directly instead of access(R_OK)
1709 * since access(R_OK) only checks with real UID/GID but open() use effective
1710 * UID/GID and actual capabilities (e.g. /proc/kcore requires CAP_SYS_RAWIO).
1712 static bool filename__readable(const char *file)
1714 int fd = open(file, O_RDONLY);
1721 static char *dso__find_kallsyms(struct dso *dso, struct map *map)
1723 u8 host_build_id[BUILD_ID_SIZE];
1724 char sbuild_id[SBUILD_ID_SIZE];
1725 bool is_host = false;
1726 char path[PATH_MAX];
1728 if (!dso->has_build_id) {
1730 * Last resort, if we don't have a build-id and couldn't find
1731 * any vmlinux file, try the running kernel kallsyms table.
1736 if (sysfs__read_build_id("/sys/kernel/notes", host_build_id,
1737 sizeof(host_build_id)) == 0)
1738 is_host = dso__build_id_equal(dso, host_build_id);
1740 /* Try a fast path for /proc/kallsyms if possible */
1743 * Do not check the build-id cache, unless we know we cannot use
1744 * /proc/kcore or module maps don't match to /proc/kallsyms.
1745 * To check readability of /proc/kcore, do not use access(R_OK)
1746 * since /proc/kcore requires CAP_SYS_RAWIO to read and access
1749 if (filename__readable("/proc/kcore") &&
1750 !validate_kcore_addresses("/proc/kallsyms", map))
1754 build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
1756 /* Find kallsyms in build-id cache with kcore */
1757 scnprintf(path, sizeof(path), "%s/%s/%s",
1758 buildid_dir, DSO__NAME_KCORE, sbuild_id);
1760 if (!find_matching_kcore(map, path, sizeof(path)))
1761 return strdup(path);
1763 /* Use current /proc/kallsyms if possible */
1766 return strdup("/proc/kallsyms");
1769 /* Finally, find a cache of kallsyms */
1770 if (!build_id_cache__kallsyms_path(sbuild_id, path, sizeof(path))) {
1771 pr_err("No kallsyms or vmlinux with build-id %s was found\n",
1776 return strdup(path);
1779 static int dso__load_kernel_sym(struct dso *dso, struct map *map)
1782 const char *kallsyms_filename = NULL;
1783 char *kallsyms_allocated_filename = NULL;
1785 * Step 1: if the user specified a kallsyms or vmlinux filename, use
1786 * it and only it, reporting errors to the user if it cannot be used.
1788 * For instance, try to analyse an ARM perf.data file _without_ a
1789 * build-id, or if the user specifies the wrong path to the right
1790 * vmlinux file, obviously we can't fallback to another vmlinux (a
1791 * x86_86 one, on the machine where analysis is being performed, say),
1792 * or worse, /proc/kallsyms.
1794 * If the specified file _has_ a build-id and there is a build-id
1795 * section in the perf.data file, we will still do the expected
1796 * validation in dso__load_vmlinux and will bail out if they don't
1799 if (symbol_conf.kallsyms_name != NULL) {
1800 kallsyms_filename = symbol_conf.kallsyms_name;
1804 if (!symbol_conf.ignore_vmlinux && symbol_conf.vmlinux_name != NULL) {
1805 return dso__load_vmlinux(dso, map, symbol_conf.vmlinux_name, false);
1808 if (!symbol_conf.ignore_vmlinux && vmlinux_path != NULL) {
1809 err = dso__load_vmlinux_path(dso, map);
1814 /* do not try local files if a symfs was given */
1815 if (symbol_conf.symfs[0] != 0)
1818 kallsyms_allocated_filename = dso__find_kallsyms(dso, map);
1819 if (!kallsyms_allocated_filename)
1822 kallsyms_filename = kallsyms_allocated_filename;
1825 err = dso__load_kallsyms(dso, kallsyms_filename, map);
1827 pr_debug("Using %s for symbols\n", kallsyms_filename);
1828 free(kallsyms_allocated_filename);
1830 if (err > 0 && !dso__is_kcore(dso)) {
1831 dso->binary_type = DSO_BINARY_TYPE__KALLSYMS;
1832 dso__set_long_name(dso, DSO__NAME_KALLSYMS, false);
1833 map__fixup_start(map);
1834 map__fixup_end(map);
1840 static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map)
1843 const char *kallsyms_filename = NULL;
1844 struct machine *machine;
1845 char path[PATH_MAX];
1848 pr_debug("Guest kernel map hasn't the point to groups\n");
1851 machine = map->groups->machine;
1853 if (machine__is_default_guest(machine)) {
1855 * if the user specified a vmlinux filename, use it and only
1856 * it, reporting errors to the user if it cannot be used.
1857 * Or use file guest_kallsyms inputted by user on commandline
1859 if (symbol_conf.default_guest_vmlinux_name != NULL) {
1860 err = dso__load_vmlinux(dso, map,
1861 symbol_conf.default_guest_vmlinux_name,
1866 kallsyms_filename = symbol_conf.default_guest_kallsyms;
1867 if (!kallsyms_filename)
1870 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
1871 kallsyms_filename = path;
1874 err = dso__load_kallsyms(dso, kallsyms_filename, map);
1876 pr_debug("Using %s for symbols\n", kallsyms_filename);
1877 if (err > 0 && !dso__is_kcore(dso)) {
1878 dso->binary_type = DSO_BINARY_TYPE__GUEST_KALLSYMS;
1879 machine__mmap_name(machine, path, sizeof(path));
1880 dso__set_long_name(dso, strdup(path), true);
1881 map__fixup_start(map);
1882 map__fixup_end(map);
1888 static void vmlinux_path__exit(void)
1890 while (--vmlinux_path__nr_entries >= 0)
1891 zfree(&vmlinux_path[vmlinux_path__nr_entries]);
1892 vmlinux_path__nr_entries = 0;
1894 zfree(&vmlinux_path);
1897 static const char * const vmlinux_paths[] = {
1902 static const char * const vmlinux_paths_upd[] = {
1904 "/usr/lib/debug/boot/vmlinux-%s",
1905 "/lib/modules/%s/build/vmlinux",
1906 "/usr/lib/debug/lib/modules/%s/vmlinux",
1907 "/usr/lib/debug/boot/vmlinux-%s.debug"
1910 static int vmlinux_path__add(const char *new_entry)
1912 vmlinux_path[vmlinux_path__nr_entries] = strdup(new_entry);
1913 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
1915 ++vmlinux_path__nr_entries;
1920 static int vmlinux_path__init(struct perf_env *env)
1924 char *kernel_version;
1927 vmlinux_path = malloc(sizeof(char *) * (ARRAY_SIZE(vmlinux_paths) +
1928 ARRAY_SIZE(vmlinux_paths_upd)));
1929 if (vmlinux_path == NULL)
1932 for (i = 0; i < ARRAY_SIZE(vmlinux_paths); i++)
1933 if (vmlinux_path__add(vmlinux_paths[i]) < 0)
1936 /* only try kernel version if no symfs was given */
1937 if (symbol_conf.symfs[0] != 0)
1941 kernel_version = env->os_release;
1943 if (uname(&uts) < 0)
1946 kernel_version = uts.release;
1949 for (i = 0; i < ARRAY_SIZE(vmlinux_paths_upd); i++) {
1950 snprintf(bf, sizeof(bf), vmlinux_paths_upd[i], kernel_version);
1951 if (vmlinux_path__add(bf) < 0)
1958 vmlinux_path__exit();
1962 int setup_list(struct strlist **list, const char *list_str,
1963 const char *list_name)
1965 if (list_str == NULL)
1968 *list = strlist__new(list_str, NULL);
1970 pr_err("problems parsing %s list\n", list_name);
1974 symbol_conf.has_filter = true;
1978 int setup_intlist(struct intlist **list, const char *list_str,
1979 const char *list_name)
1981 if (list_str == NULL)
1984 *list = intlist__new(list_str);
1986 pr_err("problems parsing %s list\n", list_name);
1992 static bool symbol__read_kptr_restrict(void)
1995 FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r");
2000 if (fgets(line, sizeof(line), fp) != NULL)
2001 value = ((geteuid() != 0) || (getuid() != 0)) ?
2011 int symbol__annotation_init(void)
2013 if (symbol_conf.initialized) {
2014 pr_err("Annotation needs to be init before symbol__init()\n");
2018 if (symbol_conf.init_annotation) {
2019 pr_warning("Annotation being initialized multiple times\n");
2023 symbol_conf.priv_size += sizeof(struct annotation);
2024 symbol_conf.init_annotation = true;
2028 int symbol__init(struct perf_env *env)
2032 if (symbol_conf.initialized)
2035 symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64));
2039 if (symbol_conf.sort_by_name)
2040 symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) -
2041 sizeof(struct symbol));
2043 if (symbol_conf.try_vmlinux_path && vmlinux_path__init(env) < 0)
2046 if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') {
2047 pr_err("'.' is the only non valid --field-separator argument\n");
2051 if (setup_list(&symbol_conf.dso_list,
2052 symbol_conf.dso_list_str, "dso") < 0)
2055 if (setup_list(&symbol_conf.comm_list,
2056 symbol_conf.comm_list_str, "comm") < 0)
2057 goto out_free_dso_list;
2059 if (setup_intlist(&symbol_conf.pid_list,
2060 symbol_conf.pid_list_str, "pid") < 0)
2061 goto out_free_comm_list;
2063 if (setup_intlist(&symbol_conf.tid_list,
2064 symbol_conf.tid_list_str, "tid") < 0)
2065 goto out_free_pid_list;
2067 if (setup_list(&symbol_conf.sym_list,
2068 symbol_conf.sym_list_str, "symbol") < 0)
2069 goto out_free_tid_list;
2071 if (setup_list(&symbol_conf.bt_stop_list,
2072 symbol_conf.bt_stop_list_str, "symbol") < 0)
2073 goto out_free_sym_list;
2076 * A path to symbols of "/" is identical to ""
2077 * reset here for simplicity.
2079 symfs = realpath(symbol_conf.symfs, NULL);
2081 symfs = symbol_conf.symfs;
2082 if (strcmp(symfs, "/") == 0)
2083 symbol_conf.symfs = "";
2084 if (symfs != symbol_conf.symfs)
2085 free((void *)symfs);
2087 symbol_conf.kptr_restrict = symbol__read_kptr_restrict();
2089 symbol_conf.initialized = true;
2093 strlist__delete(symbol_conf.sym_list);
2095 intlist__delete(symbol_conf.tid_list);
2097 intlist__delete(symbol_conf.pid_list);
2099 strlist__delete(symbol_conf.comm_list);
2101 strlist__delete(symbol_conf.dso_list);
2105 void symbol__exit(void)
2107 if (!symbol_conf.initialized)
2109 strlist__delete(symbol_conf.bt_stop_list);
2110 strlist__delete(symbol_conf.sym_list);
2111 strlist__delete(symbol_conf.dso_list);
2112 strlist__delete(symbol_conf.comm_list);
2113 intlist__delete(symbol_conf.tid_list);
2114 intlist__delete(symbol_conf.pid_list);
2115 vmlinux_path__exit();
2116 symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL;
2117 symbol_conf.bt_stop_list = NULL;
2118 symbol_conf.initialized = false;
2121 int symbol__config_symfs(const struct option *opt __maybe_unused,
2122 const char *dir, int unset __maybe_unused)
2127 symbol_conf.symfs = strdup(dir);
2128 if (symbol_conf.symfs == NULL)
2131 /* skip the locally configured cache if a symfs is given, and
2132 * config buildid dir to symfs/.debug
2134 ret = asprintf(&bf, "%s/%s", dir, ".debug");
2138 set_buildid_dir(bf);