1 // SPDX-License-Identifier: GPL-2.0
7 #include <linux/kernel.h>
10 #include <sys/param.h>
22 #include "namespaces.h"
25 #include "sane_ctype.h"
29 #include <symbol/kallsyms.h>
30 #include <sys/utsname.h>
32 static int dso__load_kernel_sym(struct dso *dso, struct map *map);
33 static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map);
34 static bool symbol__is_idle(const char *name);
36 int vmlinux_path__nr_entries;
39 struct symbol_conf symbol_conf = {
41 .try_vmlinux_path = true,
44 .demangle_kernel = false,
45 .cumulate_callchain = true,
46 .show_hist_headers = true,
52 static enum dso_binary_type binary_type_symtab[] = {
53 DSO_BINARY_TYPE__KALLSYMS,
54 DSO_BINARY_TYPE__GUEST_KALLSYMS,
55 DSO_BINARY_TYPE__JAVA_JIT,
56 DSO_BINARY_TYPE__DEBUGLINK,
57 DSO_BINARY_TYPE__BUILD_ID_CACHE,
58 DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO,
59 DSO_BINARY_TYPE__FEDORA_DEBUGINFO,
60 DSO_BINARY_TYPE__UBUNTU_DEBUGINFO,
61 DSO_BINARY_TYPE__BUILDID_DEBUGINFO,
62 DSO_BINARY_TYPE__SYSTEM_PATH_DSO,
63 DSO_BINARY_TYPE__GUEST_KMODULE,
64 DSO_BINARY_TYPE__GUEST_KMODULE_COMP,
65 DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE,
66 DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP,
67 DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO,
68 DSO_BINARY_TYPE__NOT_FOUND,
71 #define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab)
73 bool symbol_type__is_a(char symbol_type, enum map_type map_type)
75 symbol_type = toupper(symbol_type);
79 return symbol_type == 'T' || symbol_type == 'W';
81 return symbol_type == 'D';
87 static int prefix_underscores_count(const char *str)
89 const char *tail = str;
97 const char * __weak arch__normalize_symbol_name(const char *name)
102 int __weak arch__compare_symbol_names(const char *namea, const char *nameb)
104 return strcmp(namea, nameb);
107 int __weak arch__compare_symbol_names_n(const char *namea, const char *nameb,
110 return strncmp(namea, nameb, n);
113 int __weak arch__choose_best_symbol(struct symbol *syma,
114 struct symbol *symb __maybe_unused)
116 /* Avoid "SyS" kernel syscall aliases */
117 if (strlen(syma->name) >= 3 && !strncmp(syma->name, "SyS", 3))
119 if (strlen(syma->name) >= 10 && !strncmp(syma->name, "compat_SyS", 10))
125 static int choose_best_symbol(struct symbol *syma, struct symbol *symb)
131 /* Prefer a symbol with non zero length */
132 a = syma->end - syma->start;
133 b = symb->end - symb->start;
134 if ((b == 0) && (a > 0))
136 else if ((a == 0) && (b > 0))
139 /* Prefer a non weak symbol over a weak one */
140 a = syma->binding == STB_WEAK;
141 b = symb->binding == STB_WEAK;
147 /* Prefer a global symbol over a non global one */
148 a = syma->binding == STB_GLOBAL;
149 b = symb->binding == STB_GLOBAL;
155 /* Prefer a symbol with less underscores */
156 a = prefix_underscores_count(syma->name);
157 b = prefix_underscores_count(symb->name);
163 /* Choose the symbol with the longest name */
164 na = strlen(syma->name);
165 nb = strlen(symb->name);
171 return arch__choose_best_symbol(syma, symb);
174 void symbols__fixup_duplicate(struct rb_root *symbols)
177 struct symbol *curr, *next;
179 if (symbol_conf.allow_aliases)
182 nd = rb_first(symbols);
185 curr = rb_entry(nd, struct symbol, rb_node);
187 nd = rb_next(&curr->rb_node);
188 next = rb_entry(nd, struct symbol, rb_node);
193 if (curr->start != next->start)
196 if (choose_best_symbol(curr, next) == SYMBOL_A) {
197 rb_erase(&next->rb_node, symbols);
198 symbol__delete(next);
201 nd = rb_next(&curr->rb_node);
202 rb_erase(&curr->rb_node, symbols);
203 symbol__delete(curr);
208 void symbols__fixup_end(struct rb_root *symbols)
210 struct rb_node *nd, *prevnd = rb_first(symbols);
211 struct symbol *curr, *prev;
216 curr = rb_entry(prevnd, struct symbol, rb_node);
218 for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
220 curr = rb_entry(nd, struct symbol, rb_node);
222 if (prev->end == prev->start && prev->end != curr->start)
223 prev->end = curr->start;
227 if (curr->end == curr->start)
228 curr->end = roundup(curr->start, 4096) + 4096;
231 void __map_groups__fixup_end(struct map_groups *mg, enum map_type type)
233 struct maps *maps = &mg->maps[type];
234 struct map *next, *curr;
236 down_write(&maps->lock);
238 curr = maps__first(maps);
242 for (next = map__next(curr); next; next = map__next(curr)) {
244 curr->end = next->start;
249 * We still haven't the actual symbols, so guess the
250 * last map final address.
256 up_write(&maps->lock);
259 struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name)
261 size_t namelen = strlen(name) + 1;
262 struct symbol *sym = calloc(1, (symbol_conf.priv_size +
263 sizeof(*sym) + namelen));
267 if (symbol_conf.priv_size) {
268 if (symbol_conf.init_annotation) {
269 struct annotation *notes = (void *)sym;
270 pthread_mutex_init(¬es->lock, NULL);
272 sym = ((void *)sym) + symbol_conf.priv_size;
276 sym->end = len ? start + len : start;
277 sym->binding = binding;
278 sym->namelen = namelen - 1;
280 pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n",
281 __func__, name, start, sym->end);
282 memcpy(sym->name, name, namelen);
287 void symbol__delete(struct symbol *sym)
289 free(((void *)sym) - symbol_conf.priv_size);
292 void symbols__delete(struct rb_root *symbols)
295 struct rb_node *next = rb_first(symbols);
298 pos = rb_entry(next, struct symbol, rb_node);
299 next = rb_next(&pos->rb_node);
300 rb_erase(&pos->rb_node, symbols);
305 void __symbols__insert(struct rb_root *symbols, struct symbol *sym, bool kernel)
307 struct rb_node **p = &symbols->rb_node;
308 struct rb_node *parent = NULL;
309 const u64 ip = sym->start;
313 const char *name = sym->name;
315 * ppc64 uses function descriptors and appends a '.' to the
316 * start of every instruction address. Remove it.
320 sym->idle = symbol__is_idle(name);
325 s = rb_entry(parent, struct symbol, rb_node);
331 rb_link_node(&sym->rb_node, parent, p);
332 rb_insert_color(&sym->rb_node, symbols);
335 void symbols__insert(struct rb_root *symbols, struct symbol *sym)
337 __symbols__insert(symbols, sym, false);
340 static struct symbol *symbols__find(struct rb_root *symbols, u64 ip)
347 n = symbols->rb_node;
350 struct symbol *s = rb_entry(n, struct symbol, rb_node);
354 else if (ip > s->end || (ip == s->end && ip != s->start))
363 static struct symbol *symbols__first(struct rb_root *symbols)
365 struct rb_node *n = rb_first(symbols);
368 return rb_entry(n, struct symbol, rb_node);
373 static struct symbol *symbols__last(struct rb_root *symbols)
375 struct rb_node *n = rb_last(symbols);
378 return rb_entry(n, struct symbol, rb_node);
383 static struct symbol *symbols__next(struct symbol *sym)
385 struct rb_node *n = rb_next(&sym->rb_node);
388 return rb_entry(n, struct symbol, rb_node);
393 static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym)
395 struct rb_node **p = &symbols->rb_node;
396 struct rb_node *parent = NULL;
397 struct symbol_name_rb_node *symn, *s;
399 symn = container_of(sym, struct symbol_name_rb_node, sym);
403 s = rb_entry(parent, struct symbol_name_rb_node, rb_node);
404 if (strcmp(sym->name, s->sym.name) < 0)
409 rb_link_node(&symn->rb_node, parent, p);
410 rb_insert_color(&symn->rb_node, symbols);
413 static void symbols__sort_by_name(struct rb_root *symbols,
414 struct rb_root *source)
418 for (nd = rb_first(source); nd; nd = rb_next(nd)) {
419 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
420 symbols__insert_by_name(symbols, pos);
424 int symbol__match_symbol_name(const char *name, const char *str,
425 enum symbol_tag_include includes)
427 const char *versioning;
429 if (includes == SYMBOL_TAG_INCLUDE__DEFAULT_ONLY &&
430 (versioning = strstr(name, "@@"))) {
431 int len = strlen(str);
433 if (len < versioning - name)
434 len = versioning - name;
436 return arch__compare_symbol_names_n(name, str, len);
438 return arch__compare_symbol_names(name, str);
441 static struct symbol *symbols__find_by_name(struct rb_root *symbols,
443 enum symbol_tag_include includes)
446 struct symbol_name_rb_node *s = NULL;
451 n = symbols->rb_node;
456 s = rb_entry(n, struct symbol_name_rb_node, rb_node);
457 cmp = symbol__match_symbol_name(s->sym.name, name, includes);
470 if (includes != SYMBOL_TAG_INCLUDE__DEFAULT_ONLY)
471 /* return first symbol that has same name (if any) */
472 for (n = rb_prev(n); n; n = rb_prev(n)) {
473 struct symbol_name_rb_node *tmp;
475 tmp = rb_entry(n, struct symbol_name_rb_node, rb_node);
476 if (arch__compare_symbol_names(tmp->sym.name, s->sym.name))
485 void dso__reset_find_symbol_cache(struct dso *dso)
489 for (type = MAP__FUNCTION; type <= MAP__VARIABLE; ++type) {
490 dso->last_find_result[type].addr = 0;
491 dso->last_find_result[type].symbol = NULL;
495 void dso__insert_symbol(struct dso *dso, enum map_type type, struct symbol *sym)
497 __symbols__insert(&dso->symbols[type], sym, dso->kernel);
499 /* update the symbol cache if necessary */
500 if (dso->last_find_result[type].addr >= sym->start &&
501 (dso->last_find_result[type].addr < sym->end ||
502 sym->start == sym->end)) {
503 dso->last_find_result[type].symbol = sym;
507 struct symbol *dso__find_symbol(struct dso *dso,
508 enum map_type type, u64 addr)
510 if (dso->last_find_result[type].addr != addr || dso->last_find_result[type].symbol == NULL) {
511 dso->last_find_result[type].addr = addr;
512 dso->last_find_result[type].symbol = symbols__find(&dso->symbols[type], addr);
515 return dso->last_find_result[type].symbol;
518 struct symbol *dso__first_symbol(struct dso *dso, enum map_type type)
520 return symbols__first(&dso->symbols[type]);
523 struct symbol *dso__last_symbol(struct dso *dso, enum map_type type)
525 return symbols__last(&dso->symbols[type]);
528 struct symbol *dso__next_symbol(struct symbol *sym)
530 return symbols__next(sym);
533 struct symbol *symbol__next_by_name(struct symbol *sym)
535 struct symbol_name_rb_node *s = container_of(sym, struct symbol_name_rb_node, sym);
536 struct rb_node *n = rb_next(&s->rb_node);
538 return n ? &rb_entry(n, struct symbol_name_rb_node, rb_node)->sym : NULL;
542 * Teturns first symbol that matched with @name.
544 struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type,
547 struct symbol *s = symbols__find_by_name(&dso->symbol_names[type], name,
548 SYMBOL_TAG_INCLUDE__NONE);
550 s = symbols__find_by_name(&dso->symbol_names[type], name,
551 SYMBOL_TAG_INCLUDE__DEFAULT_ONLY);
555 void dso__sort_by_name(struct dso *dso, enum map_type type)
557 dso__set_sorted_by_name(dso, type);
558 return symbols__sort_by_name(&dso->symbol_names[type],
559 &dso->symbols[type]);
562 int modules__parse(const char *filename, void *arg,
563 int (*process_module)(void *arg, const char *name,
564 u64 start, u64 size))
571 file = fopen(filename, "r");
581 line_len = getline(&line, &n, file);
594 line[--line_len] = '\0'; /* \n */
596 sep = strrchr(line, 'x');
600 hex2u64(sep + 1, &start);
602 sep = strchr(line, ' ');
608 scnprintf(name, sizeof(name), "[%s]", line);
610 size = strtoul(sep + 1, &endptr, 0);
611 if (*endptr != ' ' && *endptr != '\t')
614 err = process_module(arg, name, start, size);
624 struct process_kallsyms_args {
630 * These are symbols in the kernel image, so make sure that
631 * sym is from a kernel DSO.
633 static bool symbol__is_idle(const char *name)
635 const char * const idle_symbols[] = {
644 "mwait_idle_with_hints",
646 "ppc64_runlatch_off",
647 "pseries_dedicated_idle_sleep",
652 for (i = 0; idle_symbols[i]; i++) {
653 if (!strcmp(idle_symbols[i], name))
660 static int map__process_kallsym_symbol(void *arg, const char *name,
661 char type, u64 start)
664 struct process_kallsyms_args *a = arg;
665 struct rb_root *root = &a->dso->symbols[a->map->type];
667 if (!symbol_type__is_a(type, a->map->type))
671 * module symbols are not sorted so we add all
672 * symbols, setting length to 0, and rely on
673 * symbols__fixup_end() to fix it up.
675 sym = symbol__new(start, 0, kallsyms2elf_binding(type), name);
679 * We will pass the symbols to the filter later, in
680 * map__split_kallsyms, when we have split the maps per module
682 __symbols__insert(root, sym, !strchr(name, '['));
688 * Loads the function entries in /proc/kallsyms into kernel_map->dso,
689 * so that we can in the next step set the symbol ->end address and then
690 * call kernel_maps__split_kallsyms.
692 static int dso__load_all_kallsyms(struct dso *dso, const char *filename,
695 struct process_kallsyms_args args = { .map = map, .dso = dso, };
696 return kallsyms__parse(filename, &args, map__process_kallsym_symbol);
699 static int dso__split_kallsyms_for_kcore(struct dso *dso, struct map *map)
701 struct map_groups *kmaps = map__kmaps(map);
702 struct map *curr_map;
705 struct rb_root old_root = dso->symbols[map->type];
706 struct rb_root *root = &dso->symbols[map->type];
707 struct rb_node *next = rb_first(root);
717 pos = rb_entry(next, struct symbol, rb_node);
718 next = rb_next(&pos->rb_node);
720 rb_erase_init(&pos->rb_node, &old_root);
722 module = strchr(pos->name, '\t');
726 curr_map = map_groups__find(kmaps, map->type, pos->start);
733 pos->start -= curr_map->start - curr_map->pgoff;
735 pos->end -= curr_map->start - curr_map->pgoff;
736 symbols__insert(&curr_map->dso->symbols[curr_map->type], pos);
740 /* Symbols have been adjusted */
741 dso->adjust_symbols = 1;
747 * Split the symbols into maps, making sure there are no overlaps, i.e. the
748 * kernel range is broken in several maps, named [kernel].N, as we don't have
749 * the original ELF section names vmlinux have.
751 static int dso__split_kallsyms(struct dso *dso, struct map *map, u64 delta)
753 struct map_groups *kmaps = map__kmaps(map);
754 struct machine *machine;
755 struct map *curr_map = map;
757 int count = 0, moved = 0;
758 struct rb_root *root = &dso->symbols[map->type];
759 struct rb_node *next = rb_first(root);
760 int kernel_range = 0;
765 machine = kmaps->machine;
770 pos = rb_entry(next, struct symbol, rb_node);
771 next = rb_next(&pos->rb_node);
773 module = strchr(pos->name, '\t');
775 if (!symbol_conf.use_modules)
780 if (strcmp(curr_map->dso->short_name, module)) {
781 if (curr_map != map &&
782 dso->kernel == DSO_TYPE_GUEST_KERNEL &&
783 machine__is_default_guest(machine)) {
785 * We assume all symbols of a module are
786 * continuous in * kallsyms, so curr_map
787 * points to a module and all its
788 * symbols are in its kmap. Mark it as
791 dso__set_loaded(curr_map->dso,
795 curr_map = map_groups__find_by_name(kmaps,
797 if (curr_map == NULL) {
798 pr_debug("%s/proc/{kallsyms,modules} "
799 "inconsistency while looking "
800 "for \"%s\" module!\n",
801 machine->root_dir, module);
806 if (curr_map->dso->loaded &&
807 !machine__is_default_guest(machine))
811 * So that we look just like we get from .ko files,
812 * i.e. not prelinked, relative to map->start.
814 pos->start = curr_map->map_ip(curr_map, pos->start);
815 pos->end = curr_map->map_ip(curr_map, pos->end);
816 } else if (curr_map != map) {
817 char dso_name[PATH_MAX];
821 /* Kernel was relocated at boot time */
831 if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
832 snprintf(dso_name, sizeof(dso_name),
836 snprintf(dso_name, sizeof(dso_name),
840 ndso = dso__new(dso_name);
844 ndso->kernel = dso->kernel;
846 curr_map = map__new2(pos->start, ndso, map->type);
847 if (curr_map == NULL) {
852 curr_map->map_ip = curr_map->unmap_ip = identity__map_ip;
853 map_groups__insert(kmaps, curr_map);
856 /* Kernel was relocated at boot time */
861 if (curr_map != map) {
862 rb_erase(&pos->rb_node, root);
863 symbols__insert(&curr_map->dso->symbols[curr_map->type], pos);
870 rb_erase(&pos->rb_node, root);
874 if (curr_map != map &&
875 dso->kernel == DSO_TYPE_GUEST_KERNEL &&
876 machine__is_default_guest(kmaps->machine)) {
877 dso__set_loaded(curr_map->dso, curr_map->type);
880 return count + moved;
883 bool symbol__restricted_filename(const char *filename,
884 const char *restricted_filename)
886 bool restricted = false;
888 if (symbol_conf.kptr_restrict) {
889 char *r = realpath(filename, NULL);
892 restricted = strcmp(r, restricted_filename) == 0;
902 struct rb_node rb_node;
907 static void add_module(struct module_info *mi, struct rb_root *modules)
909 struct rb_node **p = &modules->rb_node;
910 struct rb_node *parent = NULL;
911 struct module_info *m;
915 m = rb_entry(parent, struct module_info, rb_node);
916 if (strcmp(mi->name, m->name) < 0)
921 rb_link_node(&mi->rb_node, parent, p);
922 rb_insert_color(&mi->rb_node, modules);
925 static void delete_modules(struct rb_root *modules)
927 struct module_info *mi;
928 struct rb_node *next = rb_first(modules);
931 mi = rb_entry(next, struct module_info, rb_node);
932 next = rb_next(&mi->rb_node);
933 rb_erase(&mi->rb_node, modules);
939 static struct module_info *find_module(const char *name,
940 struct rb_root *modules)
942 struct rb_node *n = modules->rb_node;
945 struct module_info *m;
948 m = rb_entry(n, struct module_info, rb_node);
949 cmp = strcmp(name, m->name);
961 static int __read_proc_modules(void *arg, const char *name, u64 start,
962 u64 size __maybe_unused)
964 struct rb_root *modules = arg;
965 struct module_info *mi;
967 mi = zalloc(sizeof(struct module_info));
971 mi->name = strdup(name);
979 add_module(mi, modules);
984 static int read_proc_modules(const char *filename, struct rb_root *modules)
986 if (symbol__restricted_filename(filename, "/proc/modules"))
989 if (modules__parse(filename, modules, __read_proc_modules)) {
990 delete_modules(modules);
997 int compare_proc_modules(const char *from, const char *to)
999 struct rb_root from_modules = RB_ROOT;
1000 struct rb_root to_modules = RB_ROOT;
1001 struct rb_node *from_node, *to_node;
1002 struct module_info *from_m, *to_m;
1005 if (read_proc_modules(from, &from_modules))
1008 if (read_proc_modules(to, &to_modules))
1009 goto out_delete_from;
1011 from_node = rb_first(&from_modules);
1012 to_node = rb_first(&to_modules);
1017 from_m = rb_entry(from_node, struct module_info, rb_node);
1018 to_m = rb_entry(to_node, struct module_info, rb_node);
1020 if (from_m->start != to_m->start ||
1021 strcmp(from_m->name, to_m->name))
1024 from_node = rb_next(from_node);
1025 to_node = rb_next(to_node);
1028 if (!from_node && !to_node)
1031 delete_modules(&to_modules);
1033 delete_modules(&from_modules);
1038 static int do_validate_kcore_modules(const char *filename, struct map *map,
1039 struct map_groups *kmaps)
1041 struct rb_root modules = RB_ROOT;
1042 struct map *old_map;
1045 err = read_proc_modules(filename, &modules);
1049 old_map = map_groups__first(kmaps, map->type);
1051 struct map *next = map_groups__next(old_map);
1052 struct module_info *mi;
1054 if (old_map == map || old_map->start == map->start) {
1055 /* The kernel map */
1060 /* Module must be in memory at the same address */
1061 mi = find_module(old_map->dso->short_name, &modules);
1062 if (!mi || mi->start != old_map->start) {
1070 delete_modules(&modules);
1075 * If kallsyms is referenced by name then we look for filename in the same
1078 static bool filename_from_kallsyms_filename(char *filename,
1079 const char *base_name,
1080 const char *kallsyms_filename)
1084 strcpy(filename, kallsyms_filename);
1085 name = strrchr(filename, '/');
1091 if (!strcmp(name, "kallsyms")) {
1092 strcpy(name, base_name);
1099 static int validate_kcore_modules(const char *kallsyms_filename,
1102 struct map_groups *kmaps = map__kmaps(map);
1103 char modules_filename[PATH_MAX];
1108 if (!filename_from_kallsyms_filename(modules_filename, "modules",
1112 if (do_validate_kcore_modules(modules_filename, map, kmaps))
1118 static int validate_kcore_addresses(const char *kallsyms_filename,
1121 struct kmap *kmap = map__kmap(map);
1126 if (kmap->ref_reloc_sym && kmap->ref_reloc_sym->name) {
1129 if (kallsyms__get_function_start(kallsyms_filename,
1130 kmap->ref_reloc_sym->name, &start))
1132 if (start != kmap->ref_reloc_sym->addr)
1136 return validate_kcore_modules(kallsyms_filename, map);
1139 struct kcore_mapfn_data {
1142 struct list_head maps;
1145 static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data)
1147 struct kcore_mapfn_data *md = data;
1150 map = map__new2(start, md->dso, md->type);
1154 map->end = map->start + len;
1157 list_add(&map->node, &md->maps);
1162 static int dso__load_kcore(struct dso *dso, struct map *map,
1163 const char *kallsyms_filename)
1165 struct map_groups *kmaps = map__kmaps(map);
1166 struct machine *machine;
1167 struct kcore_mapfn_data md;
1168 struct map *old_map, *new_map, *replacement_map = NULL;
1171 char kcore_filename[PATH_MAX];
1177 machine = kmaps->machine;
1179 /* This function requires that the map is the kernel map */
1180 if (map != machine->vmlinux_maps[map->type])
1183 if (!filename_from_kallsyms_filename(kcore_filename, "kcore",
1187 /* Modules and kernel must be present at their original addresses */
1188 if (validate_kcore_addresses(kallsyms_filename, map))
1192 md.type = map->type;
1193 INIT_LIST_HEAD(&md.maps);
1195 fd = open(kcore_filename, O_RDONLY);
1197 pr_debug("Failed to open %s. Note /proc/kcore requires CAP_SYS_RAWIO capability to access.\n",
1202 /* Read new maps into temporary lists */
1203 err = file__read_maps(fd, md.type == MAP__FUNCTION, kcore_mapfn, &md,
1207 dso->is_64_bit = is_64_bit;
1209 if (list_empty(&md.maps)) {
1214 /* Remove old maps */
1215 old_map = map_groups__first(kmaps, map->type);
1217 struct map *next = map_groups__next(old_map);
1220 map_groups__remove(kmaps, old_map);
1224 /* Find the kernel map using the first symbol */
1225 sym = dso__first_symbol(dso, map->type);
1226 list_for_each_entry(new_map, &md.maps, node) {
1227 if (sym && sym->start >= new_map->start &&
1228 sym->start < new_map->end) {
1229 replacement_map = new_map;
1234 if (!replacement_map)
1235 replacement_map = list_entry(md.maps.next, struct map, node);
1238 while (!list_empty(&md.maps)) {
1239 new_map = list_entry(md.maps.next, struct map, node);
1240 list_del_init(&new_map->node);
1241 if (new_map == replacement_map) {
1242 map->start = new_map->start;
1243 map->end = new_map->end;
1244 map->pgoff = new_map->pgoff;
1245 map->map_ip = new_map->map_ip;
1246 map->unmap_ip = new_map->unmap_ip;
1247 /* Ensure maps are correctly ordered */
1249 map_groups__remove(kmaps, map);
1250 map_groups__insert(kmaps, map);
1253 map_groups__insert(kmaps, new_map);
1260 * Set the data type and long name so that kcore can be read via
1261 * dso__data_read_addr().
1263 if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
1264 dso->binary_type = DSO_BINARY_TYPE__GUEST_KCORE;
1266 dso->binary_type = DSO_BINARY_TYPE__KCORE;
1267 dso__set_long_name(dso, strdup(kcore_filename), true);
1271 if (map->type == MAP__FUNCTION)
1272 pr_debug("Using %s for kernel object code\n", kcore_filename);
1274 pr_debug("Using %s for kernel data\n", kcore_filename);
1279 while (!list_empty(&md.maps)) {
1280 map = list_entry(md.maps.next, struct map, node);
1281 list_del_init(&map->node);
1289 * If the kernel is relocated at boot time, kallsyms won't match. Compute the
1290 * delta based on the relocation reference symbol.
1292 static int kallsyms__delta(struct map *map, const char *filename, u64 *delta)
1294 struct kmap *kmap = map__kmap(map);
1300 if (!kmap->ref_reloc_sym || !kmap->ref_reloc_sym->name)
1303 if (kallsyms__get_function_start(filename, kmap->ref_reloc_sym->name, &addr))
1306 *delta = addr - kmap->ref_reloc_sym->addr;
1310 int __dso__load_kallsyms(struct dso *dso, const char *filename,
1311 struct map *map, bool no_kcore)
1315 if (symbol__restricted_filename(filename, "/proc/kallsyms"))
1318 if (dso__load_all_kallsyms(dso, filename, map) < 0)
1321 if (kallsyms__delta(map, filename, &delta))
1324 symbols__fixup_end(&dso->symbols[map->type]);
1325 symbols__fixup_duplicate(&dso->symbols[map->type]);
1327 if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
1328 dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS;
1330 dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS;
1332 if (!no_kcore && !dso__load_kcore(dso, map, filename))
1333 return dso__split_kallsyms_for_kcore(dso, map);
1335 return dso__split_kallsyms(dso, map, delta);
1338 int dso__load_kallsyms(struct dso *dso, const char *filename,
1341 return __dso__load_kallsyms(dso, filename, map, false);
1344 static int dso__load_perf_map(const char *map_path, struct dso *dso,
1352 file = fopen(map_path, "r");
1356 while (!feof(file)) {
1361 line_len = getline(&line, &n, file);
1368 line[--line_len] = '\0'; /* \n */
1370 len = hex2u64(line, &start);
1373 if (len + 2 >= line_len)
1376 len += hex2u64(line + len, &size);
1379 if (len + 2 >= line_len)
1382 sym = symbol__new(start, size, STB_GLOBAL, line + len);
1385 goto out_delete_line;
1387 symbols__insert(&dso->symbols[map->type], sym);
1402 static bool dso__is_compatible_symtab_type(struct dso *dso, bool kmod,
1403 enum dso_binary_type type)
1406 case DSO_BINARY_TYPE__JAVA_JIT:
1407 case DSO_BINARY_TYPE__DEBUGLINK:
1408 case DSO_BINARY_TYPE__SYSTEM_PATH_DSO:
1409 case DSO_BINARY_TYPE__FEDORA_DEBUGINFO:
1410 case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO:
1411 case DSO_BINARY_TYPE__BUILDID_DEBUGINFO:
1412 case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO:
1413 return !kmod && dso->kernel == DSO_TYPE_USER;
1415 case DSO_BINARY_TYPE__KALLSYMS:
1416 case DSO_BINARY_TYPE__VMLINUX:
1417 case DSO_BINARY_TYPE__KCORE:
1418 return dso->kernel == DSO_TYPE_KERNEL;
1420 case DSO_BINARY_TYPE__GUEST_KALLSYMS:
1421 case DSO_BINARY_TYPE__GUEST_VMLINUX:
1422 case DSO_BINARY_TYPE__GUEST_KCORE:
1423 return dso->kernel == DSO_TYPE_GUEST_KERNEL;
1425 case DSO_BINARY_TYPE__GUEST_KMODULE:
1426 case DSO_BINARY_TYPE__GUEST_KMODULE_COMP:
1427 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE:
1428 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP:
1430 * kernel modules know their symtab type - it's set when
1431 * creating a module dso in machine__findnew_module_map().
1433 return kmod && dso->symtab_type == type;
1435 case DSO_BINARY_TYPE__BUILD_ID_CACHE:
1436 case DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO:
1439 case DSO_BINARY_TYPE__NOT_FOUND:
1445 /* Checks for the existence of the perf-<pid>.map file in two different
1446 * locations. First, if the process is a separate mount namespace, check in
1447 * that namespace using the pid of the innermost pid namespace. If's not in a
1448 * namespace, or the file can't be found there, try in the mount namespace of
1449 * the tracing process using our view of its pid.
1451 static int dso__find_perf_map(char *filebuf, size_t bufsz,
1452 struct nsinfo **nsip)
1454 struct nscookie nsc;
1456 struct nsinfo *nnsi;
1461 if (nsi->need_setns) {
1462 snprintf(filebuf, bufsz, "/tmp/perf-%d.map", nsi->nstgid);
1463 nsinfo__mountns_enter(nsi, &nsc);
1464 rc = access(filebuf, R_OK);
1465 nsinfo__mountns_exit(&nsc);
1470 nnsi = nsinfo__copy(nsi);
1474 nnsi->need_setns = false;
1475 snprintf(filebuf, bufsz, "/tmp/perf-%d.map", nnsi->tgid);
1483 int dso__load(struct dso *dso, struct map *map)
1488 struct machine *machine;
1489 char *root_dir = (char *) "";
1491 struct symsrc ss_[2];
1492 struct symsrc *syms_ss = NULL, *runtime_ss = NULL;
1495 unsigned char build_id[BUILD_ID_SIZE];
1496 struct nscookie nsc;
1497 char newmapname[PATH_MAX];
1498 const char *map_path = dso->long_name;
1500 perfmap = strncmp(dso->name, "/tmp/perf-", 10) == 0;
1502 if (dso->nsinfo && (dso__find_perf_map(newmapname,
1503 sizeof(newmapname), &dso->nsinfo) == 0)) {
1504 map_path = newmapname;
1508 nsinfo__mountns_enter(dso->nsinfo, &nsc);
1509 pthread_mutex_lock(&dso->lock);
1511 /* check again under the dso->lock */
1512 if (dso__loaded(dso, map->type)) {
1518 if (dso->kernel == DSO_TYPE_KERNEL)
1519 ret = dso__load_kernel_sym(dso, map);
1520 else if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
1521 ret = dso__load_guest_kernel_sym(dso, map);
1526 if (map->groups && map->groups->machine)
1527 machine = map->groups->machine;
1531 dso->adjust_symbols = 0;
1536 if (lstat(map_path, &st) < 0)
1539 if (!symbol_conf.force && st.st_uid && (st.st_uid != geteuid())) {
1540 pr_warning("File %s not owned by current user or root, "
1541 "ignoring it (use -f to override).\n", map_path);
1545 ret = dso__load_perf_map(map_path, dso, map);
1546 dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT :
1547 DSO_BINARY_TYPE__NOT_FOUND;
1552 root_dir = machine->root_dir;
1554 name = malloc(PATH_MAX);
1558 kmod = dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE ||
1559 dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP ||
1560 dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE ||
1561 dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP;
1565 * Read the build id if possible. This is required for
1566 * DSO_BINARY_TYPE__BUILDID_DEBUGINFO to work
1568 if (!dso->has_build_id &&
1569 is_regular_file(dso->long_name)) {
1570 __symbol__join_symfs(name, PATH_MAX, dso->long_name);
1571 if (filename__read_build_id(name, build_id, BUILD_ID_SIZE) > 0)
1572 dso__set_build_id(dso, build_id);
1576 * Iterate over candidate debug images.
1577 * Keep track of "interesting" ones (those which have a symtab, dynsym,
1578 * and/or opd section) for processing.
1580 for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) {
1581 struct symsrc *ss = &ss_[ss_pos];
1582 bool next_slot = false;
1587 enum dso_binary_type symtab_type = binary_type_symtab[i];
1589 nsexit = (symtab_type == DSO_BINARY_TYPE__BUILD_ID_CACHE ||
1590 symtab_type == DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO);
1592 if (!dso__is_compatible_symtab_type(dso, kmod, symtab_type))
1595 if (dso__read_binary_type_filename(dso, symtab_type,
1596 root_dir, name, PATH_MAX))
1600 nsinfo__mountns_exit(&nsc);
1602 is_reg = is_regular_file(name);
1604 sirc = symsrc__init(ss, dso, name, symtab_type);
1607 nsinfo__mountns_enter(dso->nsinfo, &nsc);
1609 if (!is_reg || sirc < 0)
1612 if (!syms_ss && symsrc__has_symtab(ss)) {
1615 if (!dso->symsrc_filename)
1616 dso->symsrc_filename = strdup(name);
1619 if (!runtime_ss && symsrc__possibly_runtime(ss)) {
1627 if (syms_ss && runtime_ss)
1630 symsrc__destroy(ss);
1635 if (!runtime_ss && !syms_ss)
1638 if (runtime_ss && !syms_ss) {
1639 syms_ss = runtime_ss;
1642 /* We'll have to hope for the best */
1643 if (!runtime_ss && syms_ss)
1644 runtime_ss = syms_ss;
1647 ret = dso__load_sym(dso, map, syms_ss, runtime_ss, kmod);
1654 nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss, map);
1659 for (; ss_pos > 0; ss_pos--)
1660 symsrc__destroy(&ss_[ss_pos - 1]);
1663 if (ret < 0 && strstr(dso->name, " (deleted)") != NULL)
1666 dso__set_loaded(dso, map->type);
1667 pthread_mutex_unlock(&dso->lock);
1668 nsinfo__mountns_exit(&nsc);
1673 struct map *map_groups__find_by_name(struct map_groups *mg,
1674 enum map_type type, const char *name)
1676 struct maps *maps = &mg->maps[type];
1679 down_read(&maps->lock);
1681 for (map = maps__first(maps); map; map = map__next(map)) {
1682 if (map->dso && strcmp(map->dso->short_name, name) == 0)
1689 up_read(&maps->lock);
1693 int dso__load_vmlinux(struct dso *dso, struct map *map,
1694 const char *vmlinux, bool vmlinux_allocated)
1698 char symfs_vmlinux[PATH_MAX];
1699 enum dso_binary_type symtab_type;
1701 if (vmlinux[0] == '/')
1702 snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux);
1704 symbol__join_symfs(symfs_vmlinux, vmlinux);
1706 if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
1707 symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX;
1709 symtab_type = DSO_BINARY_TYPE__VMLINUX;
1711 if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type))
1714 err = dso__load_sym(dso, map, &ss, &ss, 0);
1715 symsrc__destroy(&ss);
1718 if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
1719 dso->binary_type = DSO_BINARY_TYPE__GUEST_VMLINUX;
1721 dso->binary_type = DSO_BINARY_TYPE__VMLINUX;
1722 dso__set_long_name(dso, vmlinux, vmlinux_allocated);
1723 dso__set_loaded(dso, map->type);
1724 pr_debug("Using %s for symbols\n", symfs_vmlinux);
1730 int dso__load_vmlinux_path(struct dso *dso, struct map *map)
1733 char *filename = NULL;
1735 pr_debug("Looking at the vmlinux_path (%d entries long)\n",
1736 vmlinux_path__nr_entries + 1);
1738 for (i = 0; i < vmlinux_path__nr_entries; ++i) {
1739 err = dso__load_vmlinux(dso, map, vmlinux_path[i], false);
1744 if (!symbol_conf.ignore_vmlinux_buildid)
1745 filename = dso__build_id_filename(dso, NULL, 0, false);
1746 if (filename != NULL) {
1747 err = dso__load_vmlinux(dso, map, filename, true);
1756 static bool visible_dir_filter(const char *name, struct dirent *d)
1758 if (d->d_type != DT_DIR)
1760 return lsdir_no_dot_filter(name, d);
1763 static int find_matching_kcore(struct map *map, char *dir, size_t dir_sz)
1765 char kallsyms_filename[PATH_MAX];
1767 struct strlist *dirs;
1768 struct str_node *nd;
1770 dirs = lsdir(dir, visible_dir_filter);
1774 strlist__for_each_entry(nd, dirs) {
1775 scnprintf(kallsyms_filename, sizeof(kallsyms_filename),
1776 "%s/%s/kallsyms", dir, nd->s);
1777 if (!validate_kcore_addresses(kallsyms_filename, map)) {
1778 strlcpy(dir, kallsyms_filename, dir_sz);
1784 strlist__delete(dirs);
1790 * Use open(O_RDONLY) to check readability directly instead of access(R_OK)
1791 * since access(R_OK) only checks with real UID/GID but open() use effective
1792 * UID/GID and actual capabilities (e.g. /proc/kcore requires CAP_SYS_RAWIO).
1794 static bool filename__readable(const char *file)
1796 int fd = open(file, O_RDONLY);
1803 static char *dso__find_kallsyms(struct dso *dso, struct map *map)
1805 u8 host_build_id[BUILD_ID_SIZE];
1806 char sbuild_id[SBUILD_ID_SIZE];
1807 bool is_host = false;
1808 char path[PATH_MAX];
1810 if (!dso->has_build_id) {
1812 * Last resort, if we don't have a build-id and couldn't find
1813 * any vmlinux file, try the running kernel kallsyms table.
1818 if (sysfs__read_build_id("/sys/kernel/notes", host_build_id,
1819 sizeof(host_build_id)) == 0)
1820 is_host = dso__build_id_equal(dso, host_build_id);
1822 /* Try a fast path for /proc/kallsyms if possible */
1825 * Do not check the build-id cache, unless we know we cannot use
1826 * /proc/kcore or module maps don't match to /proc/kallsyms.
1827 * To check readability of /proc/kcore, do not use access(R_OK)
1828 * since /proc/kcore requires CAP_SYS_RAWIO to read and access
1831 if (filename__readable("/proc/kcore") &&
1832 !validate_kcore_addresses("/proc/kallsyms", map))
1836 build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
1838 /* Find kallsyms in build-id cache with kcore */
1839 scnprintf(path, sizeof(path), "%s/%s/%s",
1840 buildid_dir, DSO__NAME_KCORE, sbuild_id);
1842 if (!find_matching_kcore(map, path, sizeof(path)))
1843 return strdup(path);
1845 /* Use current /proc/kallsyms if possible */
1848 return strdup("/proc/kallsyms");
1851 /* Finally, find a cache of kallsyms */
1852 if (!build_id_cache__kallsyms_path(sbuild_id, path, sizeof(path))) {
1853 pr_err("No kallsyms or vmlinux with build-id %s was found\n",
1858 return strdup(path);
1861 static int dso__load_kernel_sym(struct dso *dso, struct map *map)
1864 const char *kallsyms_filename = NULL;
1865 char *kallsyms_allocated_filename = NULL;
1867 * Step 1: if the user specified a kallsyms or vmlinux filename, use
1868 * it and only it, reporting errors to the user if it cannot be used.
1870 * For instance, try to analyse an ARM perf.data file _without_ a
1871 * build-id, or if the user specifies the wrong path to the right
1872 * vmlinux file, obviously we can't fallback to another vmlinux (a
1873 * x86_86 one, on the machine where analysis is being performed, say),
1874 * or worse, /proc/kallsyms.
1876 * If the specified file _has_ a build-id and there is a build-id
1877 * section in the perf.data file, we will still do the expected
1878 * validation in dso__load_vmlinux and will bail out if they don't
1881 if (symbol_conf.kallsyms_name != NULL) {
1882 kallsyms_filename = symbol_conf.kallsyms_name;
1886 if (!symbol_conf.ignore_vmlinux && symbol_conf.vmlinux_name != NULL) {
1887 return dso__load_vmlinux(dso, map, symbol_conf.vmlinux_name, false);
1890 if (!symbol_conf.ignore_vmlinux && vmlinux_path != NULL) {
1891 err = dso__load_vmlinux_path(dso, map);
1896 /* do not try local files if a symfs was given */
1897 if (symbol_conf.symfs[0] != 0)
1900 kallsyms_allocated_filename = dso__find_kallsyms(dso, map);
1901 if (!kallsyms_allocated_filename)
1904 kallsyms_filename = kallsyms_allocated_filename;
1907 err = dso__load_kallsyms(dso, kallsyms_filename, map);
1909 pr_debug("Using %s for symbols\n", kallsyms_filename);
1910 free(kallsyms_allocated_filename);
1912 if (err > 0 && !dso__is_kcore(dso)) {
1913 dso->binary_type = DSO_BINARY_TYPE__KALLSYMS;
1914 dso__set_long_name(dso, DSO__NAME_KALLSYMS, false);
1915 map__fixup_start(map);
1916 map__fixup_end(map);
1922 static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map)
1925 const char *kallsyms_filename = NULL;
1926 struct machine *machine;
1927 char path[PATH_MAX];
1930 pr_debug("Guest kernel map hasn't the point to groups\n");
1933 machine = map->groups->machine;
1935 if (machine__is_default_guest(machine)) {
1937 * if the user specified a vmlinux filename, use it and only
1938 * it, reporting errors to the user if it cannot be used.
1939 * Or use file guest_kallsyms inputted by user on commandline
1941 if (symbol_conf.default_guest_vmlinux_name != NULL) {
1942 err = dso__load_vmlinux(dso, map,
1943 symbol_conf.default_guest_vmlinux_name,
1948 kallsyms_filename = symbol_conf.default_guest_kallsyms;
1949 if (!kallsyms_filename)
1952 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
1953 kallsyms_filename = path;
1956 err = dso__load_kallsyms(dso, kallsyms_filename, map);
1958 pr_debug("Using %s for symbols\n", kallsyms_filename);
1959 if (err > 0 && !dso__is_kcore(dso)) {
1960 dso->binary_type = DSO_BINARY_TYPE__GUEST_KALLSYMS;
1961 dso__set_long_name(dso, machine->mmap_name, false);
1962 map__fixup_start(map);
1963 map__fixup_end(map);
1969 static void vmlinux_path__exit(void)
1971 while (--vmlinux_path__nr_entries >= 0)
1972 zfree(&vmlinux_path[vmlinux_path__nr_entries]);
1973 vmlinux_path__nr_entries = 0;
1975 zfree(&vmlinux_path);
1978 static const char * const vmlinux_paths[] = {
1983 static const char * const vmlinux_paths_upd[] = {
1985 "/usr/lib/debug/boot/vmlinux-%s",
1986 "/lib/modules/%s/build/vmlinux",
1987 "/usr/lib/debug/lib/modules/%s/vmlinux",
1988 "/usr/lib/debug/boot/vmlinux-%s.debug"
1991 static int vmlinux_path__add(const char *new_entry)
1993 vmlinux_path[vmlinux_path__nr_entries] = strdup(new_entry);
1994 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
1996 ++vmlinux_path__nr_entries;
2001 static int vmlinux_path__init(struct perf_env *env)
2005 char *kernel_version;
2008 vmlinux_path = malloc(sizeof(char *) * (ARRAY_SIZE(vmlinux_paths) +
2009 ARRAY_SIZE(vmlinux_paths_upd)));
2010 if (vmlinux_path == NULL)
2013 for (i = 0; i < ARRAY_SIZE(vmlinux_paths); i++)
2014 if (vmlinux_path__add(vmlinux_paths[i]) < 0)
2017 /* only try kernel version if no symfs was given */
2018 if (symbol_conf.symfs[0] != 0)
2022 kernel_version = env->os_release;
2024 if (uname(&uts) < 0)
2027 kernel_version = uts.release;
2030 for (i = 0; i < ARRAY_SIZE(vmlinux_paths_upd); i++) {
2031 snprintf(bf, sizeof(bf), vmlinux_paths_upd[i], kernel_version);
2032 if (vmlinux_path__add(bf) < 0)
2039 vmlinux_path__exit();
2043 int setup_list(struct strlist **list, const char *list_str,
2044 const char *list_name)
2046 if (list_str == NULL)
2049 *list = strlist__new(list_str, NULL);
2051 pr_err("problems parsing %s list\n", list_name);
2055 symbol_conf.has_filter = true;
2059 int setup_intlist(struct intlist **list, const char *list_str,
2060 const char *list_name)
2062 if (list_str == NULL)
2065 *list = intlist__new(list_str);
2067 pr_err("problems parsing %s list\n", list_name);
2073 static bool symbol__read_kptr_restrict(void)
2076 FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r");
2081 if (fgets(line, sizeof(line), fp) != NULL)
2082 value = ((geteuid() != 0) || (getuid() != 0)) ?
2092 int symbol__annotation_init(void)
2094 if (symbol_conf.init_annotation)
2097 if (symbol_conf.initialized) {
2098 pr_err("Annotation needs to be init before symbol__init()\n");
2102 symbol_conf.priv_size += sizeof(struct annotation);
2103 symbol_conf.init_annotation = true;
2107 int symbol__init(struct perf_env *env)
2111 if (symbol_conf.initialized)
2114 symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64));
2118 if (symbol_conf.sort_by_name)
2119 symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) -
2120 sizeof(struct symbol));
2122 if (symbol_conf.try_vmlinux_path && vmlinux_path__init(env) < 0)
2125 if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') {
2126 pr_err("'.' is the only non valid --field-separator argument\n");
2130 if (setup_list(&symbol_conf.dso_list,
2131 symbol_conf.dso_list_str, "dso") < 0)
2134 if (setup_list(&symbol_conf.comm_list,
2135 symbol_conf.comm_list_str, "comm") < 0)
2136 goto out_free_dso_list;
2138 if (setup_intlist(&symbol_conf.pid_list,
2139 symbol_conf.pid_list_str, "pid") < 0)
2140 goto out_free_comm_list;
2142 if (setup_intlist(&symbol_conf.tid_list,
2143 symbol_conf.tid_list_str, "tid") < 0)
2144 goto out_free_pid_list;
2146 if (setup_list(&symbol_conf.sym_list,
2147 symbol_conf.sym_list_str, "symbol") < 0)
2148 goto out_free_tid_list;
2150 if (setup_list(&symbol_conf.bt_stop_list,
2151 symbol_conf.bt_stop_list_str, "symbol") < 0)
2152 goto out_free_sym_list;
2155 * A path to symbols of "/" is identical to ""
2156 * reset here for simplicity.
2158 symfs = realpath(symbol_conf.symfs, NULL);
2160 symfs = symbol_conf.symfs;
2161 if (strcmp(symfs, "/") == 0)
2162 symbol_conf.symfs = "";
2163 if (symfs != symbol_conf.symfs)
2164 free((void *)symfs);
2166 symbol_conf.kptr_restrict = symbol__read_kptr_restrict();
2168 symbol_conf.initialized = true;
2172 strlist__delete(symbol_conf.sym_list);
2174 intlist__delete(symbol_conf.tid_list);
2176 intlist__delete(symbol_conf.pid_list);
2178 strlist__delete(symbol_conf.comm_list);
2180 strlist__delete(symbol_conf.dso_list);
2184 void symbol__exit(void)
2186 if (!symbol_conf.initialized)
2188 strlist__delete(symbol_conf.bt_stop_list);
2189 strlist__delete(symbol_conf.sym_list);
2190 strlist__delete(symbol_conf.dso_list);
2191 strlist__delete(symbol_conf.comm_list);
2192 intlist__delete(symbol_conf.tid_list);
2193 intlist__delete(symbol_conf.pid_list);
2194 vmlinux_path__exit();
2195 symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL;
2196 symbol_conf.bt_stop_list = NULL;
2197 symbol_conf.initialized = false;
2200 int symbol__config_symfs(const struct option *opt __maybe_unused,
2201 const char *dir, int unset __maybe_unused)
2206 symbol_conf.symfs = strdup(dir);
2207 if (symbol_conf.symfs == NULL)
2210 /* skip the locally configured cache if a symfs is given, and
2211 * config buildid dir to symfs/.debug
2213 ret = asprintf(&bf, "%s/%s", dir, ".debug");
2217 set_buildid_dir(bf);
2223 struct mem_info *mem_info__get(struct mem_info *mi)
2226 refcount_inc(&mi->refcnt);
2230 void mem_info__put(struct mem_info *mi)
2232 if (mi && refcount_dec_and_test(&mi->refcnt))
2236 struct mem_info *mem_info__new(void)
2238 struct mem_info *mi = zalloc(sizeof(*mi));
2241 refcount_set(&mi->refcnt, 1);