1 // SPDX-License-Identifier: GPL-2.0
7 #include <linux/kernel.h>
8 #include <linux/mman.h>
11 #include <sys/param.h>
23 #include "namespaces.h"
26 #include "sane_ctype.h"
30 #include <symbol/kallsyms.h>
31 #include <sys/utsname.h>
33 static int dso__load_kernel_sym(struct dso *dso, struct map *map);
34 static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map);
35 static bool symbol__is_idle(const char *name);
37 int vmlinux_path__nr_entries;
40 struct symbol_conf symbol_conf = {
42 .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 static bool symbol_type__filter(char symbol_type)
75 symbol_type = toupper(symbol_type);
76 return symbol_type == 'T' || symbol_type == 'W' || symbol_type == 'D' || symbol_type == 'B';
79 static int prefix_underscores_count(const char *str)
81 const char *tail = str;
89 const char * __weak arch__normalize_symbol_name(const char *name)
94 int __weak arch__compare_symbol_names(const char *namea, const char *nameb)
96 return strcmp(namea, nameb);
99 int __weak arch__compare_symbol_names_n(const char *namea, const char *nameb,
102 return strncmp(namea, nameb, n);
105 int __weak arch__choose_best_symbol(struct symbol *syma,
106 struct symbol *symb __maybe_unused)
108 /* Avoid "SyS" kernel syscall aliases */
109 if (strlen(syma->name) >= 3 && !strncmp(syma->name, "SyS", 3))
111 if (strlen(syma->name) >= 10 && !strncmp(syma->name, "compat_SyS", 10))
117 static int choose_best_symbol(struct symbol *syma, struct symbol *symb)
123 /* Prefer a symbol with non zero length */
124 a = syma->end - syma->start;
125 b = symb->end - symb->start;
126 if ((b == 0) && (a > 0))
128 else if ((a == 0) && (b > 0))
131 /* Prefer a non weak symbol over a weak one */
132 a = syma->binding == STB_WEAK;
133 b = symb->binding == STB_WEAK;
139 /* Prefer a global symbol over a non global one */
140 a = syma->binding == STB_GLOBAL;
141 b = symb->binding == STB_GLOBAL;
147 /* Prefer a symbol with less underscores */
148 a = prefix_underscores_count(syma->name);
149 b = prefix_underscores_count(symb->name);
155 /* Choose the symbol with the longest name */
156 na = strlen(syma->name);
157 nb = strlen(symb->name);
163 return arch__choose_best_symbol(syma, symb);
166 void symbols__fixup_duplicate(struct rb_root *symbols)
169 struct symbol *curr, *next;
171 if (symbol_conf.allow_aliases)
174 nd = rb_first(symbols);
177 curr = rb_entry(nd, struct symbol, rb_node);
179 nd = rb_next(&curr->rb_node);
180 next = rb_entry(nd, struct symbol, rb_node);
185 if (curr->start != next->start)
188 if (choose_best_symbol(curr, next) == SYMBOL_A) {
189 rb_erase(&next->rb_node, symbols);
190 symbol__delete(next);
193 nd = rb_next(&curr->rb_node);
194 rb_erase(&curr->rb_node, symbols);
195 symbol__delete(curr);
200 void symbols__fixup_end(struct rb_root *symbols)
202 struct rb_node *nd, *prevnd = rb_first(symbols);
203 struct symbol *curr, *prev;
208 curr = rb_entry(prevnd, struct symbol, rb_node);
210 for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
212 curr = rb_entry(nd, struct symbol, rb_node);
214 if (prev->end == prev->start && prev->end != curr->start)
215 prev->end = curr->start;
219 if (curr->end == curr->start)
220 curr->end = roundup(curr->start, 4096) + 4096;
223 void map_groups__fixup_end(struct map_groups *mg)
225 struct maps *maps = &mg->maps;
226 struct map *next, *curr;
228 down_write(&maps->lock);
230 curr = maps__first(maps);
234 for (next = map__next(curr); next; next = map__next(curr)) {
236 curr->end = next->start;
241 * We still haven't the actual symbols, so guess the
242 * last map final address.
248 up_write(&maps->lock);
251 struct symbol *symbol__new(u64 start, u64 len, u8 binding, u8 type, const char *name)
253 size_t namelen = strlen(name) + 1;
254 struct symbol *sym = calloc(1, (symbol_conf.priv_size +
255 sizeof(*sym) + namelen));
259 if (symbol_conf.priv_size) {
260 if (symbol_conf.init_annotation) {
261 struct annotation *notes = (void *)sym;
262 pthread_mutex_init(¬es->lock, NULL);
264 sym = ((void *)sym) + symbol_conf.priv_size;
268 sym->end = len ? start + len : start;
270 sym->binding = binding;
271 sym->namelen = namelen - 1;
273 pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n",
274 __func__, name, start, sym->end);
275 memcpy(sym->name, name, namelen);
280 void symbol__delete(struct symbol *sym)
282 free(((void *)sym) - symbol_conf.priv_size);
285 void symbols__delete(struct rb_root *symbols)
288 struct rb_node *next = rb_first(symbols);
291 pos = rb_entry(next, struct symbol, rb_node);
292 next = rb_next(&pos->rb_node);
293 rb_erase(&pos->rb_node, symbols);
298 void __symbols__insert(struct rb_root *symbols, struct symbol *sym, bool kernel)
300 struct rb_node **p = &symbols->rb_node;
301 struct rb_node *parent = NULL;
302 const u64 ip = sym->start;
306 const char *name = sym->name;
308 * ppc64 uses function descriptors and appends a '.' to the
309 * start of every instruction address. Remove it.
313 sym->idle = symbol__is_idle(name);
318 s = rb_entry(parent, struct symbol, rb_node);
324 rb_link_node(&sym->rb_node, parent, p);
325 rb_insert_color(&sym->rb_node, symbols);
328 void symbols__insert(struct rb_root *symbols, struct symbol *sym)
330 __symbols__insert(symbols, sym, false);
333 static struct symbol *symbols__find(struct rb_root *symbols, u64 ip)
340 n = symbols->rb_node;
343 struct symbol *s = rb_entry(n, struct symbol, rb_node);
347 else if (ip > s->end || (ip == s->end && ip != s->start))
356 static struct symbol *symbols__first(struct rb_root *symbols)
358 struct rb_node *n = rb_first(symbols);
361 return rb_entry(n, struct symbol, rb_node);
366 static struct symbol *symbols__last(struct rb_root *symbols)
368 struct rb_node *n = rb_last(symbols);
371 return rb_entry(n, struct symbol, rb_node);
376 static struct symbol *symbols__next(struct symbol *sym)
378 struct rb_node *n = rb_next(&sym->rb_node);
381 return rb_entry(n, struct symbol, rb_node);
386 static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym)
388 struct rb_node **p = &symbols->rb_node;
389 struct rb_node *parent = NULL;
390 struct symbol_name_rb_node *symn, *s;
392 symn = container_of(sym, struct symbol_name_rb_node, sym);
396 s = rb_entry(parent, struct symbol_name_rb_node, rb_node);
397 if (strcmp(sym->name, s->sym.name) < 0)
402 rb_link_node(&symn->rb_node, parent, p);
403 rb_insert_color(&symn->rb_node, symbols);
406 static void symbols__sort_by_name(struct rb_root *symbols,
407 struct rb_root *source)
411 for (nd = rb_first(source); nd; nd = rb_next(nd)) {
412 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
413 symbols__insert_by_name(symbols, pos);
417 int symbol__match_symbol_name(const char *name, const char *str,
418 enum symbol_tag_include includes)
420 const char *versioning;
422 if (includes == SYMBOL_TAG_INCLUDE__DEFAULT_ONLY &&
423 (versioning = strstr(name, "@@"))) {
424 int len = strlen(str);
426 if (len < versioning - name)
427 len = versioning - name;
429 return arch__compare_symbol_names_n(name, str, len);
431 return arch__compare_symbol_names(name, str);
434 static struct symbol *symbols__find_by_name(struct rb_root *symbols,
436 enum symbol_tag_include includes)
439 struct symbol_name_rb_node *s = NULL;
444 n = symbols->rb_node;
449 s = rb_entry(n, struct symbol_name_rb_node, rb_node);
450 cmp = symbol__match_symbol_name(s->sym.name, name, includes);
463 if (includes != SYMBOL_TAG_INCLUDE__DEFAULT_ONLY)
464 /* return first symbol that has same name (if any) */
465 for (n = rb_prev(n); n; n = rb_prev(n)) {
466 struct symbol_name_rb_node *tmp;
468 tmp = rb_entry(n, struct symbol_name_rb_node, rb_node);
469 if (arch__compare_symbol_names(tmp->sym.name, s->sym.name))
478 void dso__reset_find_symbol_cache(struct dso *dso)
480 dso->last_find_result.addr = 0;
481 dso->last_find_result.symbol = NULL;
484 void dso__insert_symbol(struct dso *dso, struct symbol *sym)
486 __symbols__insert(&dso->symbols, sym, dso->kernel);
488 /* update the symbol cache if necessary */
489 if (dso->last_find_result.addr >= sym->start &&
490 (dso->last_find_result.addr < sym->end ||
491 sym->start == sym->end)) {
492 dso->last_find_result.symbol = sym;
496 struct symbol *dso__find_symbol(struct dso *dso, u64 addr)
498 if (dso->last_find_result.addr != addr || dso->last_find_result.symbol == NULL) {
499 dso->last_find_result.addr = addr;
500 dso->last_find_result.symbol = symbols__find(&dso->symbols, addr);
503 return dso->last_find_result.symbol;
506 struct symbol *dso__first_symbol(struct dso *dso)
508 return symbols__first(&dso->symbols);
511 struct symbol *dso__last_symbol(struct dso *dso)
513 return symbols__last(&dso->symbols);
516 struct symbol *dso__next_symbol(struct symbol *sym)
518 return symbols__next(sym);
521 struct symbol *symbol__next_by_name(struct symbol *sym)
523 struct symbol_name_rb_node *s = container_of(sym, struct symbol_name_rb_node, sym);
524 struct rb_node *n = rb_next(&s->rb_node);
526 return n ? &rb_entry(n, struct symbol_name_rb_node, rb_node)->sym : NULL;
530 * Returns first symbol that matched with @name.
532 struct symbol *dso__find_symbol_by_name(struct dso *dso, const char *name)
534 struct symbol *s = symbols__find_by_name(&dso->symbol_names, name,
535 SYMBOL_TAG_INCLUDE__NONE);
537 s = symbols__find_by_name(&dso->symbol_names, name,
538 SYMBOL_TAG_INCLUDE__DEFAULT_ONLY);
542 void dso__sort_by_name(struct dso *dso)
544 dso__set_sorted_by_name(dso);
545 return symbols__sort_by_name(&dso->symbol_names, &dso->symbols);
548 int modules__parse(const char *filename, void *arg,
549 int (*process_module)(void *arg, const char *name,
550 u64 start, u64 size))
557 file = fopen(filename, "r");
567 line_len = getline(&line, &n, file);
580 line[--line_len] = '\0'; /* \n */
582 sep = strrchr(line, 'x');
586 hex2u64(sep + 1, &start);
588 sep = strchr(line, ' ');
594 scnprintf(name, sizeof(name), "[%s]", line);
596 size = strtoul(sep + 1, &endptr, 0);
597 if (*endptr != ' ' && *endptr != '\t')
600 err = process_module(arg, name, start, size);
611 * These are symbols in the kernel image, so make sure that
612 * sym is from a kernel DSO.
614 static bool symbol__is_idle(const char *name)
616 const char * const idle_symbols[] = {
625 "mwait_idle_with_hints",
627 "ppc64_runlatch_off",
628 "pseries_dedicated_idle_sleep",
633 for (i = 0; idle_symbols[i]; i++) {
634 if (!strcmp(idle_symbols[i], name))
641 static int map__process_kallsym_symbol(void *arg, const char *name,
642 char type, u64 start)
645 struct dso *dso = arg;
646 struct rb_root *root = &dso->symbols;
648 if (!symbol_type__filter(type))
652 * module symbols are not sorted so we add all
653 * symbols, setting length to 0, and rely on
654 * symbols__fixup_end() to fix it up.
656 sym = symbol__new(start, 0, kallsyms2elf_binding(type), kallsyms2elf_type(type), name);
660 * We will pass the symbols to the filter later, in
661 * map__split_kallsyms, when we have split the maps per module
663 __symbols__insert(root, sym, !strchr(name, '['));
669 * Loads the function entries in /proc/kallsyms into kernel_map->dso,
670 * so that we can in the next step set the symbol ->end address and then
671 * call kernel_maps__split_kallsyms.
673 static int dso__load_all_kallsyms(struct dso *dso, const char *filename)
675 return kallsyms__parse(filename, dso, map__process_kallsym_symbol);
678 static int map_groups__split_kallsyms_for_kcore(struct map_groups *kmaps, struct dso *dso)
680 struct map *curr_map;
683 struct rb_root old_root = dso->symbols;
684 struct rb_root *root = &dso->symbols;
685 struct rb_node *next = rb_first(root);
695 pos = rb_entry(next, struct symbol, rb_node);
696 next = rb_next(&pos->rb_node);
698 rb_erase_init(&pos->rb_node, &old_root);
700 module = strchr(pos->name, '\t');
704 curr_map = map_groups__find(kmaps, pos->start);
711 pos->start -= curr_map->start - curr_map->pgoff;
713 pos->end -= curr_map->start - curr_map->pgoff;
714 symbols__insert(&curr_map->dso->symbols, pos);
718 /* Symbols have been adjusted */
719 dso->adjust_symbols = 1;
725 * Split the symbols into maps, making sure there are no overlaps, i.e. the
726 * kernel range is broken in several maps, named [kernel].N, as we don't have
727 * the original ELF section names vmlinux have.
729 static int map_groups__split_kallsyms(struct map_groups *kmaps, struct dso *dso, u64 delta,
730 struct map *initial_map)
732 struct machine *machine;
733 struct map *curr_map = initial_map;
735 int count = 0, moved = 0;
736 struct rb_root *root = &dso->symbols;
737 struct rb_node *next = rb_first(root);
738 int kernel_range = 0;
744 machine = kmaps->machine;
746 x86_64 = machine__is(machine, "x86_64");
751 pos = rb_entry(next, struct symbol, rb_node);
752 next = rb_next(&pos->rb_node);
754 module = strchr(pos->name, '\t');
756 if (!symbol_conf.use_modules)
761 if (strcmp(curr_map->dso->short_name, module)) {
762 if (curr_map != initial_map &&
763 dso->kernel == DSO_TYPE_GUEST_KERNEL &&
764 machine__is_default_guest(machine)) {
766 * We assume all symbols of a module are
767 * continuous in * kallsyms, so curr_map
768 * points to a module and all its
769 * symbols are in its kmap. Mark it as
772 dso__set_loaded(curr_map->dso);
775 curr_map = map_groups__find_by_name(kmaps, module);
776 if (curr_map == NULL) {
777 pr_debug("%s/proc/{kallsyms,modules} "
778 "inconsistency while looking "
779 "for \"%s\" module!\n",
780 machine->root_dir, module);
781 curr_map = initial_map;
785 if (curr_map->dso->loaded &&
786 !machine__is_default_guest(machine))
790 * So that we look just like we get from .ko files,
791 * i.e. not prelinked, relative to initial_map->start.
793 pos->start = curr_map->map_ip(curr_map, pos->start);
794 pos->end = curr_map->map_ip(curr_map, pos->end);
795 } else if (x86_64 && is_entry_trampoline(pos->name)) {
797 * These symbols are not needed anymore since the
798 * trampoline maps refer to the text section and it's
799 * symbols instead. Avoid having to deal with
800 * relocations, and the assumption that the first symbol
801 * is the start of kernel text, by simply removing the
802 * symbols at this point.
805 } else if (curr_map != initial_map) {
806 char dso_name[PATH_MAX];
810 /* Kernel was relocated at boot time */
816 curr_map = initial_map;
820 if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
821 snprintf(dso_name, sizeof(dso_name),
825 snprintf(dso_name, sizeof(dso_name),
829 ndso = dso__new(dso_name);
833 ndso->kernel = dso->kernel;
835 curr_map = map__new2(pos->start, ndso);
836 if (curr_map == NULL) {
841 curr_map->map_ip = curr_map->unmap_ip = identity__map_ip;
842 map_groups__insert(kmaps, curr_map);
845 /* Kernel was relocated at boot time */
850 if (curr_map != initial_map) {
851 rb_erase(&pos->rb_node, root);
852 symbols__insert(&curr_map->dso->symbols, pos);
859 rb_erase(&pos->rb_node, root);
863 if (curr_map != initial_map &&
864 dso->kernel == DSO_TYPE_GUEST_KERNEL &&
865 machine__is_default_guest(kmaps->machine)) {
866 dso__set_loaded(curr_map->dso);
869 return count + moved;
872 bool symbol__restricted_filename(const char *filename,
873 const char *restricted_filename)
875 bool restricted = false;
877 if (symbol_conf.kptr_restrict) {
878 char *r = realpath(filename, NULL);
881 restricted = strcmp(r, restricted_filename) == 0;
891 struct rb_node rb_node;
896 static void add_module(struct module_info *mi, struct rb_root *modules)
898 struct rb_node **p = &modules->rb_node;
899 struct rb_node *parent = NULL;
900 struct module_info *m;
904 m = rb_entry(parent, struct module_info, rb_node);
905 if (strcmp(mi->name, m->name) < 0)
910 rb_link_node(&mi->rb_node, parent, p);
911 rb_insert_color(&mi->rb_node, modules);
914 static void delete_modules(struct rb_root *modules)
916 struct module_info *mi;
917 struct rb_node *next = rb_first(modules);
920 mi = rb_entry(next, struct module_info, rb_node);
921 next = rb_next(&mi->rb_node);
922 rb_erase(&mi->rb_node, modules);
928 static struct module_info *find_module(const char *name,
929 struct rb_root *modules)
931 struct rb_node *n = modules->rb_node;
934 struct module_info *m;
937 m = rb_entry(n, struct module_info, rb_node);
938 cmp = strcmp(name, m->name);
950 static int __read_proc_modules(void *arg, const char *name, u64 start,
951 u64 size __maybe_unused)
953 struct rb_root *modules = arg;
954 struct module_info *mi;
956 mi = zalloc(sizeof(struct module_info));
960 mi->name = strdup(name);
968 add_module(mi, modules);
973 static int read_proc_modules(const char *filename, struct rb_root *modules)
975 if (symbol__restricted_filename(filename, "/proc/modules"))
978 if (modules__parse(filename, modules, __read_proc_modules)) {
979 delete_modules(modules);
986 int compare_proc_modules(const char *from, const char *to)
988 struct rb_root from_modules = RB_ROOT;
989 struct rb_root to_modules = RB_ROOT;
990 struct rb_node *from_node, *to_node;
991 struct module_info *from_m, *to_m;
994 if (read_proc_modules(from, &from_modules))
997 if (read_proc_modules(to, &to_modules))
998 goto out_delete_from;
1000 from_node = rb_first(&from_modules);
1001 to_node = rb_first(&to_modules);
1006 from_m = rb_entry(from_node, struct module_info, rb_node);
1007 to_m = rb_entry(to_node, struct module_info, rb_node);
1009 if (from_m->start != to_m->start ||
1010 strcmp(from_m->name, to_m->name))
1013 from_node = rb_next(from_node);
1014 to_node = rb_next(to_node);
1017 if (!from_node && !to_node)
1020 delete_modules(&to_modules);
1022 delete_modules(&from_modules);
1027 struct map *map_groups__first(struct map_groups *mg)
1029 return maps__first(&mg->maps);
1032 static int do_validate_kcore_modules(const char *filename,
1033 struct map_groups *kmaps)
1035 struct rb_root modules = RB_ROOT;
1036 struct map *old_map;
1039 err = read_proc_modules(filename, &modules);
1043 old_map = map_groups__first(kmaps);
1045 struct map *next = map_groups__next(old_map);
1046 struct module_info *mi;
1048 if (!__map__is_kmodule(old_map)) {
1053 /* Module must be in memory at the same address */
1054 mi = find_module(old_map->dso->short_name, &modules);
1055 if (!mi || mi->start != old_map->start) {
1063 delete_modules(&modules);
1068 * If kallsyms is referenced by name then we look for filename in the same
1071 static bool filename_from_kallsyms_filename(char *filename,
1072 const char *base_name,
1073 const char *kallsyms_filename)
1077 strcpy(filename, kallsyms_filename);
1078 name = strrchr(filename, '/');
1084 if (!strcmp(name, "kallsyms")) {
1085 strcpy(name, base_name);
1092 static int validate_kcore_modules(const char *kallsyms_filename,
1095 struct map_groups *kmaps = map__kmaps(map);
1096 char modules_filename[PATH_MAX];
1101 if (!filename_from_kallsyms_filename(modules_filename, "modules",
1105 if (do_validate_kcore_modules(modules_filename, kmaps))
1111 static int validate_kcore_addresses(const char *kallsyms_filename,
1114 struct kmap *kmap = map__kmap(map);
1119 if (kmap->ref_reloc_sym && kmap->ref_reloc_sym->name) {
1122 if (kallsyms__get_function_start(kallsyms_filename,
1123 kmap->ref_reloc_sym->name, &start))
1125 if (start != kmap->ref_reloc_sym->addr)
1129 return validate_kcore_modules(kallsyms_filename, map);
1132 struct kcore_mapfn_data {
1134 struct list_head maps;
1137 static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data)
1139 struct kcore_mapfn_data *md = data;
1142 map = map__new2(start, md->dso);
1146 map->end = map->start + len;
1149 list_add(&map->node, &md->maps);
1154 static int dso__load_kcore(struct dso *dso, struct map *map,
1155 const char *kallsyms_filename)
1157 struct map_groups *kmaps = map__kmaps(map);
1158 struct kcore_mapfn_data md;
1159 struct map *old_map, *new_map, *replacement_map = NULL;
1160 struct machine *machine;
1163 char kcore_filename[PATH_MAX];
1169 machine = kmaps->machine;
1171 /* This function requires that the map is the kernel map */
1172 if (!__map__is_kernel(map))
1175 if (!filename_from_kallsyms_filename(kcore_filename, "kcore",
1179 /* Modules and kernel must be present at their original addresses */
1180 if (validate_kcore_addresses(kallsyms_filename, map))
1184 INIT_LIST_HEAD(&md.maps);
1186 fd = open(kcore_filename, O_RDONLY);
1188 pr_debug("Failed to open %s. Note /proc/kcore requires CAP_SYS_RAWIO capability to access.\n",
1193 /* Read new maps into temporary lists */
1194 err = file__read_maps(fd, map->prot & PROT_EXEC, kcore_mapfn, &md,
1198 dso->is_64_bit = is_64_bit;
1200 if (list_empty(&md.maps)) {
1205 /* Remove old maps */
1206 old_map = map_groups__first(kmaps);
1208 struct map *next = map_groups__next(old_map);
1211 map_groups__remove(kmaps, old_map);
1214 machine->trampolines_mapped = false;
1216 /* Find the kernel map using the '_stext' symbol */
1217 if (!kallsyms__get_function_start(kallsyms_filename, "_stext", &stext)) {
1218 list_for_each_entry(new_map, &md.maps, node) {
1219 if (stext >= new_map->start && stext < new_map->end) {
1220 replacement_map = new_map;
1226 if (!replacement_map)
1227 replacement_map = list_entry(md.maps.next, struct map, node);
1230 while (!list_empty(&md.maps)) {
1231 new_map = list_entry(md.maps.next, struct map, node);
1232 list_del_init(&new_map->node);
1233 if (new_map == replacement_map) {
1234 map->start = new_map->start;
1235 map->end = new_map->end;
1236 map->pgoff = new_map->pgoff;
1237 map->map_ip = new_map->map_ip;
1238 map->unmap_ip = new_map->unmap_ip;
1239 /* Ensure maps are correctly ordered */
1241 map_groups__remove(kmaps, map);
1242 map_groups__insert(kmaps, map);
1245 map_groups__insert(kmaps, new_map);
1251 if (machine__is(machine, "x86_64")) {
1255 * If one of the corresponding symbols is there, assume the
1256 * entry trampoline maps are too.
1258 if (!kallsyms__get_function_start(kallsyms_filename,
1259 ENTRY_TRAMPOLINE_NAME,
1261 machine->trampolines_mapped = true;
1265 * Set the data type and long name so that kcore can be read via
1266 * dso__data_read_addr().
1268 if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
1269 dso->binary_type = DSO_BINARY_TYPE__GUEST_KCORE;
1271 dso->binary_type = DSO_BINARY_TYPE__KCORE;
1272 dso__set_long_name(dso, strdup(kcore_filename), true);
1276 if (map->prot & PROT_EXEC)
1277 pr_debug("Using %s for kernel object code\n", kcore_filename);
1279 pr_debug("Using %s for kernel data\n", kcore_filename);
1284 while (!list_empty(&md.maps)) {
1285 map = list_entry(md.maps.next, struct map, node);
1286 list_del_init(&map->node);
1294 * If the kernel is relocated at boot time, kallsyms won't match. Compute the
1295 * delta based on the relocation reference symbol.
1297 static int kallsyms__delta(struct kmap *kmap, const char *filename, u64 *delta)
1301 if (!kmap->ref_reloc_sym || !kmap->ref_reloc_sym->name)
1304 if (kallsyms__get_function_start(filename, kmap->ref_reloc_sym->name, &addr))
1307 *delta = addr - kmap->ref_reloc_sym->addr;
1311 int __dso__load_kallsyms(struct dso *dso, const char *filename,
1312 struct map *map, bool no_kcore)
1314 struct kmap *kmap = map__kmap(map);
1317 if (symbol__restricted_filename(filename, "/proc/kallsyms"))
1320 if (!kmap || !kmap->kmaps)
1323 if (dso__load_all_kallsyms(dso, filename) < 0)
1326 if (kallsyms__delta(kmap, filename, &delta))
1329 symbols__fixup_end(&dso->symbols);
1330 symbols__fixup_duplicate(&dso->symbols);
1332 if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
1333 dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS;
1335 dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS;
1337 if (!no_kcore && !dso__load_kcore(dso, map, filename))
1338 return map_groups__split_kallsyms_for_kcore(kmap->kmaps, dso);
1340 return map_groups__split_kallsyms(kmap->kmaps, dso, delta, map);
1343 int dso__load_kallsyms(struct dso *dso, const char *filename,
1346 return __dso__load_kallsyms(dso, filename, map, false);
1349 static int dso__load_perf_map(const char *map_path, struct dso *dso)
1356 file = fopen(map_path, "r");
1360 while (!feof(file)) {
1365 line_len = getline(&line, &n, file);
1372 line[--line_len] = '\0'; /* \n */
1374 len = hex2u64(line, &start);
1377 if (len + 2 >= line_len)
1380 len += hex2u64(line + len, &size);
1383 if (len + 2 >= line_len)
1386 sym = symbol__new(start, size, STB_GLOBAL, STT_FUNC, line + len);
1389 goto out_delete_line;
1391 symbols__insert(&dso->symbols, sym);
1406 static bool dso__is_compatible_symtab_type(struct dso *dso, bool kmod,
1407 enum dso_binary_type type)
1410 case DSO_BINARY_TYPE__JAVA_JIT:
1411 case DSO_BINARY_TYPE__DEBUGLINK:
1412 case DSO_BINARY_TYPE__SYSTEM_PATH_DSO:
1413 case DSO_BINARY_TYPE__FEDORA_DEBUGINFO:
1414 case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO:
1415 case DSO_BINARY_TYPE__BUILDID_DEBUGINFO:
1416 case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO:
1417 return !kmod && dso->kernel == DSO_TYPE_USER;
1419 case DSO_BINARY_TYPE__KALLSYMS:
1420 case DSO_BINARY_TYPE__VMLINUX:
1421 case DSO_BINARY_TYPE__KCORE:
1422 return dso->kernel == DSO_TYPE_KERNEL;
1424 case DSO_BINARY_TYPE__GUEST_KALLSYMS:
1425 case DSO_BINARY_TYPE__GUEST_VMLINUX:
1426 case DSO_BINARY_TYPE__GUEST_KCORE:
1427 return dso->kernel == DSO_TYPE_GUEST_KERNEL;
1429 case DSO_BINARY_TYPE__GUEST_KMODULE:
1430 case DSO_BINARY_TYPE__GUEST_KMODULE_COMP:
1431 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE:
1432 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP:
1434 * kernel modules know their symtab type - it's set when
1435 * creating a module dso in machine__findnew_module_map().
1437 return kmod && dso->symtab_type == type;
1439 case DSO_BINARY_TYPE__BUILD_ID_CACHE:
1440 case DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO:
1443 case DSO_BINARY_TYPE__NOT_FOUND:
1449 /* Checks for the existence of the perf-<pid>.map file in two different
1450 * locations. First, if the process is a separate mount namespace, check in
1451 * that namespace using the pid of the innermost pid namespace. If's not in a
1452 * namespace, or the file can't be found there, try in the mount namespace of
1453 * the tracing process using our view of its pid.
1455 static int dso__find_perf_map(char *filebuf, size_t bufsz,
1456 struct nsinfo **nsip)
1458 struct nscookie nsc;
1460 struct nsinfo *nnsi;
1465 if (nsi->need_setns) {
1466 snprintf(filebuf, bufsz, "/tmp/perf-%d.map", nsi->nstgid);
1467 nsinfo__mountns_enter(nsi, &nsc);
1468 rc = access(filebuf, R_OK);
1469 nsinfo__mountns_exit(&nsc);
1474 nnsi = nsinfo__copy(nsi);
1478 nnsi->need_setns = false;
1479 snprintf(filebuf, bufsz, "/tmp/perf-%d.map", nnsi->tgid);
1487 int dso__load(struct dso *dso, struct map *map)
1492 struct machine *machine;
1493 char *root_dir = (char *) "";
1495 struct symsrc ss_[2];
1496 struct symsrc *syms_ss = NULL, *runtime_ss = NULL;
1499 unsigned char build_id[BUILD_ID_SIZE];
1500 struct nscookie nsc;
1501 char newmapname[PATH_MAX];
1502 const char *map_path = dso->long_name;
1504 perfmap = strncmp(dso->name, "/tmp/perf-", 10) == 0;
1506 if (dso->nsinfo && (dso__find_perf_map(newmapname,
1507 sizeof(newmapname), &dso->nsinfo) == 0)) {
1508 map_path = newmapname;
1512 nsinfo__mountns_enter(dso->nsinfo, &nsc);
1513 pthread_mutex_lock(&dso->lock);
1515 /* check again under the dso->lock */
1516 if (dso__loaded(dso)) {
1521 if (map->groups && map->groups->machine)
1522 machine = map->groups->machine;
1527 if (dso->kernel == DSO_TYPE_KERNEL)
1528 ret = dso__load_kernel_sym(dso, map);
1529 else if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
1530 ret = dso__load_guest_kernel_sym(dso, map);
1532 if (machine__is(machine, "x86_64"))
1533 machine__map_x86_64_entry_trampolines(machine, dso);
1537 dso->adjust_symbols = 0;
1540 ret = dso__load_perf_map(map_path, dso);
1541 dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT :
1542 DSO_BINARY_TYPE__NOT_FOUND;
1547 root_dir = machine->root_dir;
1549 name = malloc(PATH_MAX);
1553 kmod = dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE ||
1554 dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP ||
1555 dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE ||
1556 dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP;
1560 * Read the build id if possible. This is required for
1561 * DSO_BINARY_TYPE__BUILDID_DEBUGINFO to work
1563 if (!dso->has_build_id &&
1564 is_regular_file(dso->long_name)) {
1565 __symbol__join_symfs(name, PATH_MAX, dso->long_name);
1566 if (filename__read_build_id(name, build_id, BUILD_ID_SIZE) > 0)
1567 dso__set_build_id(dso, build_id);
1571 * Iterate over candidate debug images.
1572 * Keep track of "interesting" ones (those which have a symtab, dynsym,
1573 * and/or opd section) for processing.
1575 for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) {
1576 struct symsrc *ss = &ss_[ss_pos];
1577 bool next_slot = false;
1582 enum dso_binary_type symtab_type = binary_type_symtab[i];
1584 nsexit = (symtab_type == DSO_BINARY_TYPE__BUILD_ID_CACHE ||
1585 symtab_type == DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO);
1587 if (!dso__is_compatible_symtab_type(dso, kmod, symtab_type))
1590 if (dso__read_binary_type_filename(dso, symtab_type,
1591 root_dir, name, PATH_MAX))
1595 nsinfo__mountns_exit(&nsc);
1597 is_reg = is_regular_file(name);
1599 sirc = symsrc__init(ss, dso, name, symtab_type);
1602 nsinfo__mountns_enter(dso->nsinfo, &nsc);
1604 if (!is_reg || sirc < 0)
1607 if (!syms_ss && symsrc__has_symtab(ss)) {
1610 if (!dso->symsrc_filename)
1611 dso->symsrc_filename = strdup(name);
1614 if (!runtime_ss && symsrc__possibly_runtime(ss)) {
1622 if (syms_ss && runtime_ss)
1625 symsrc__destroy(ss);
1630 if (!runtime_ss && !syms_ss)
1633 if (runtime_ss && !syms_ss) {
1634 syms_ss = runtime_ss;
1637 /* We'll have to hope for the best */
1638 if (!runtime_ss && syms_ss)
1639 runtime_ss = syms_ss;
1642 ret = dso__load_sym(dso, map, syms_ss, runtime_ss, kmod);
1649 nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss);
1654 for (; ss_pos > 0; ss_pos--)
1655 symsrc__destroy(&ss_[ss_pos - 1]);
1658 if (ret < 0 && strstr(dso->name, " (deleted)") != NULL)
1661 dso__set_loaded(dso);
1662 pthread_mutex_unlock(&dso->lock);
1663 nsinfo__mountns_exit(&nsc);
1668 struct map *map_groups__find_by_name(struct map_groups *mg, const char *name)
1670 struct maps *maps = &mg->maps;
1672 struct rb_node *node;
1674 down_read(&maps->lock);
1676 for (node = maps->names.rb_node; node; ) {
1679 map = rb_entry(node, struct map, rb_node_name);
1681 rc = strcmp(map->dso->short_name, name);
1683 node = node->rb_left;
1685 node = node->rb_right;
1694 up_read(&maps->lock);
1698 int dso__load_vmlinux(struct dso *dso, struct map *map,
1699 const char *vmlinux, bool vmlinux_allocated)
1703 char symfs_vmlinux[PATH_MAX];
1704 enum dso_binary_type symtab_type;
1706 if (vmlinux[0] == '/')
1707 snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux);
1709 symbol__join_symfs(symfs_vmlinux, vmlinux);
1711 if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
1712 symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX;
1714 symtab_type = DSO_BINARY_TYPE__VMLINUX;
1716 if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type))
1719 err = dso__load_sym(dso, map, &ss, &ss, 0);
1720 symsrc__destroy(&ss);
1723 if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
1724 dso->binary_type = DSO_BINARY_TYPE__GUEST_VMLINUX;
1726 dso->binary_type = DSO_BINARY_TYPE__VMLINUX;
1727 dso__set_long_name(dso, vmlinux, vmlinux_allocated);
1728 dso__set_loaded(dso);
1729 pr_debug("Using %s for symbols\n", symfs_vmlinux);
1735 int dso__load_vmlinux_path(struct dso *dso, struct map *map)
1738 char *filename = NULL;
1740 pr_debug("Looking at the vmlinux_path (%d entries long)\n",
1741 vmlinux_path__nr_entries + 1);
1743 for (i = 0; i < vmlinux_path__nr_entries; ++i) {
1744 err = dso__load_vmlinux(dso, map, vmlinux_path[i], false);
1749 if (!symbol_conf.ignore_vmlinux_buildid)
1750 filename = dso__build_id_filename(dso, NULL, 0, false);
1751 if (filename != NULL) {
1752 err = dso__load_vmlinux(dso, map, filename, true);
1761 static bool visible_dir_filter(const char *name, struct dirent *d)
1763 if (d->d_type != DT_DIR)
1765 return lsdir_no_dot_filter(name, d);
1768 static int find_matching_kcore(struct map *map, char *dir, size_t dir_sz)
1770 char kallsyms_filename[PATH_MAX];
1772 struct strlist *dirs;
1773 struct str_node *nd;
1775 dirs = lsdir(dir, visible_dir_filter);
1779 strlist__for_each_entry(nd, dirs) {
1780 scnprintf(kallsyms_filename, sizeof(kallsyms_filename),
1781 "%s/%s/kallsyms", dir, nd->s);
1782 if (!validate_kcore_addresses(kallsyms_filename, map)) {
1783 strlcpy(dir, kallsyms_filename, dir_sz);
1789 strlist__delete(dirs);
1795 * Use open(O_RDONLY) to check readability directly instead of access(R_OK)
1796 * since access(R_OK) only checks with real UID/GID but open() use effective
1797 * UID/GID and actual capabilities (e.g. /proc/kcore requires CAP_SYS_RAWIO).
1799 static bool filename__readable(const char *file)
1801 int fd = open(file, O_RDONLY);
1808 static char *dso__find_kallsyms(struct dso *dso, struct map *map)
1810 u8 host_build_id[BUILD_ID_SIZE];
1811 char sbuild_id[SBUILD_ID_SIZE];
1812 bool is_host = false;
1813 char path[PATH_MAX];
1815 if (!dso->has_build_id) {
1817 * Last resort, if we don't have a build-id and couldn't find
1818 * any vmlinux file, try the running kernel kallsyms table.
1823 if (sysfs__read_build_id("/sys/kernel/notes", host_build_id,
1824 sizeof(host_build_id)) == 0)
1825 is_host = dso__build_id_equal(dso, host_build_id);
1827 /* Try a fast path for /proc/kallsyms if possible */
1830 * Do not check the build-id cache, unless we know we cannot use
1831 * /proc/kcore or module maps don't match to /proc/kallsyms.
1832 * To check readability of /proc/kcore, do not use access(R_OK)
1833 * since /proc/kcore requires CAP_SYS_RAWIO to read and access
1836 if (filename__readable("/proc/kcore") &&
1837 !validate_kcore_addresses("/proc/kallsyms", map))
1841 build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
1843 /* Find kallsyms in build-id cache with kcore */
1844 scnprintf(path, sizeof(path), "%s/%s/%s",
1845 buildid_dir, DSO__NAME_KCORE, sbuild_id);
1847 if (!find_matching_kcore(map, path, sizeof(path)))
1848 return strdup(path);
1850 /* Use current /proc/kallsyms if possible */
1853 return strdup("/proc/kallsyms");
1856 /* Finally, find a cache of kallsyms */
1857 if (!build_id_cache__kallsyms_path(sbuild_id, path, sizeof(path))) {
1858 pr_err("No kallsyms or vmlinux with build-id %s was found\n",
1863 return strdup(path);
1866 static int dso__load_kernel_sym(struct dso *dso, struct map *map)
1869 const char *kallsyms_filename = NULL;
1870 char *kallsyms_allocated_filename = NULL;
1872 * Step 1: if the user specified a kallsyms or vmlinux filename, use
1873 * it and only it, reporting errors to the user if it cannot be used.
1875 * For instance, try to analyse an ARM perf.data file _without_ a
1876 * build-id, or if the user specifies the wrong path to the right
1877 * vmlinux file, obviously we can't fallback to another vmlinux (a
1878 * x86_86 one, on the machine where analysis is being performed, say),
1879 * or worse, /proc/kallsyms.
1881 * If the specified file _has_ a build-id and there is a build-id
1882 * section in the perf.data file, we will still do the expected
1883 * validation in dso__load_vmlinux and will bail out if they don't
1886 if (symbol_conf.kallsyms_name != NULL) {
1887 kallsyms_filename = symbol_conf.kallsyms_name;
1891 if (!symbol_conf.ignore_vmlinux && symbol_conf.vmlinux_name != NULL) {
1892 return dso__load_vmlinux(dso, map, symbol_conf.vmlinux_name, false);
1895 if (!symbol_conf.ignore_vmlinux && vmlinux_path != NULL) {
1896 err = dso__load_vmlinux_path(dso, map);
1901 /* do not try local files if a symfs was given */
1902 if (symbol_conf.symfs[0] != 0)
1905 kallsyms_allocated_filename = dso__find_kallsyms(dso, map);
1906 if (!kallsyms_allocated_filename)
1909 kallsyms_filename = kallsyms_allocated_filename;
1912 err = dso__load_kallsyms(dso, kallsyms_filename, map);
1914 pr_debug("Using %s for symbols\n", kallsyms_filename);
1915 free(kallsyms_allocated_filename);
1917 if (err > 0 && !dso__is_kcore(dso)) {
1918 dso->binary_type = DSO_BINARY_TYPE__KALLSYMS;
1919 dso__set_long_name(dso, DSO__NAME_KALLSYMS, false);
1920 map__fixup_start(map);
1921 map__fixup_end(map);
1927 static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map)
1930 const char *kallsyms_filename = NULL;
1931 struct machine *machine;
1932 char path[PATH_MAX];
1935 pr_debug("Guest kernel map hasn't the point to groups\n");
1938 machine = map->groups->machine;
1940 if (machine__is_default_guest(machine)) {
1942 * if the user specified a vmlinux filename, use it and only
1943 * it, reporting errors to the user if it cannot be used.
1944 * Or use file guest_kallsyms inputted by user on commandline
1946 if (symbol_conf.default_guest_vmlinux_name != NULL) {
1947 err = dso__load_vmlinux(dso, map,
1948 symbol_conf.default_guest_vmlinux_name,
1953 kallsyms_filename = symbol_conf.default_guest_kallsyms;
1954 if (!kallsyms_filename)
1957 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
1958 kallsyms_filename = path;
1961 err = dso__load_kallsyms(dso, kallsyms_filename, map);
1963 pr_debug("Using %s for symbols\n", kallsyms_filename);
1964 if (err > 0 && !dso__is_kcore(dso)) {
1965 dso->binary_type = DSO_BINARY_TYPE__GUEST_KALLSYMS;
1966 dso__set_long_name(dso, machine->mmap_name, false);
1967 map__fixup_start(map);
1968 map__fixup_end(map);
1974 static void vmlinux_path__exit(void)
1976 while (--vmlinux_path__nr_entries >= 0)
1977 zfree(&vmlinux_path[vmlinux_path__nr_entries]);
1978 vmlinux_path__nr_entries = 0;
1980 zfree(&vmlinux_path);
1983 static const char * const vmlinux_paths[] = {
1988 static const char * const vmlinux_paths_upd[] = {
1990 "/usr/lib/debug/boot/vmlinux-%s",
1991 "/lib/modules/%s/build/vmlinux",
1992 "/usr/lib/debug/lib/modules/%s/vmlinux",
1993 "/usr/lib/debug/boot/vmlinux-%s.debug"
1996 static int vmlinux_path__add(const char *new_entry)
1998 vmlinux_path[vmlinux_path__nr_entries] = strdup(new_entry);
1999 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2001 ++vmlinux_path__nr_entries;
2006 static int vmlinux_path__init(struct perf_env *env)
2010 char *kernel_version;
2013 vmlinux_path = malloc(sizeof(char *) * (ARRAY_SIZE(vmlinux_paths) +
2014 ARRAY_SIZE(vmlinux_paths_upd)));
2015 if (vmlinux_path == NULL)
2018 for (i = 0; i < ARRAY_SIZE(vmlinux_paths); i++)
2019 if (vmlinux_path__add(vmlinux_paths[i]) < 0)
2022 /* only try kernel version if no symfs was given */
2023 if (symbol_conf.symfs[0] != 0)
2027 kernel_version = env->os_release;
2029 if (uname(&uts) < 0)
2032 kernel_version = uts.release;
2035 for (i = 0; i < ARRAY_SIZE(vmlinux_paths_upd); i++) {
2036 snprintf(bf, sizeof(bf), vmlinux_paths_upd[i], kernel_version);
2037 if (vmlinux_path__add(bf) < 0)
2044 vmlinux_path__exit();
2048 int setup_list(struct strlist **list, const char *list_str,
2049 const char *list_name)
2051 if (list_str == NULL)
2054 *list = strlist__new(list_str, NULL);
2056 pr_err("problems parsing %s list\n", list_name);
2060 symbol_conf.has_filter = true;
2064 int setup_intlist(struct intlist **list, const char *list_str,
2065 const char *list_name)
2067 if (list_str == NULL)
2070 *list = intlist__new(list_str);
2072 pr_err("problems parsing %s list\n", list_name);
2078 static bool symbol__read_kptr_restrict(void)
2081 FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r");
2086 if (fgets(line, sizeof(line), fp) != NULL)
2087 value = ((geteuid() != 0) || (getuid() != 0)) ?
2097 int symbol__annotation_init(void)
2099 if (symbol_conf.init_annotation)
2102 if (symbol_conf.initialized) {
2103 pr_err("Annotation needs to be init before symbol__init()\n");
2107 symbol_conf.priv_size += sizeof(struct annotation);
2108 symbol_conf.init_annotation = true;
2112 int symbol__init(struct perf_env *env)
2116 if (symbol_conf.initialized)
2119 symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64));
2123 if (symbol_conf.sort_by_name)
2124 symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) -
2125 sizeof(struct symbol));
2127 if (symbol_conf.try_vmlinux_path && vmlinux_path__init(env) < 0)
2130 if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') {
2131 pr_err("'.' is the only non valid --field-separator argument\n");
2135 if (setup_list(&symbol_conf.dso_list,
2136 symbol_conf.dso_list_str, "dso") < 0)
2139 if (setup_list(&symbol_conf.comm_list,
2140 symbol_conf.comm_list_str, "comm") < 0)
2141 goto out_free_dso_list;
2143 if (setup_intlist(&symbol_conf.pid_list,
2144 symbol_conf.pid_list_str, "pid") < 0)
2145 goto out_free_comm_list;
2147 if (setup_intlist(&symbol_conf.tid_list,
2148 symbol_conf.tid_list_str, "tid") < 0)
2149 goto out_free_pid_list;
2151 if (setup_list(&symbol_conf.sym_list,
2152 symbol_conf.sym_list_str, "symbol") < 0)
2153 goto out_free_tid_list;
2155 if (setup_list(&symbol_conf.bt_stop_list,
2156 symbol_conf.bt_stop_list_str, "symbol") < 0)
2157 goto out_free_sym_list;
2160 * A path to symbols of "/" is identical to ""
2161 * reset here for simplicity.
2163 symfs = realpath(symbol_conf.symfs, NULL);
2165 symfs = symbol_conf.symfs;
2166 if (strcmp(symfs, "/") == 0)
2167 symbol_conf.symfs = "";
2168 if (symfs != symbol_conf.symfs)
2169 free((void *)symfs);
2171 symbol_conf.kptr_restrict = symbol__read_kptr_restrict();
2173 symbol_conf.initialized = true;
2177 strlist__delete(symbol_conf.sym_list);
2179 intlist__delete(symbol_conf.tid_list);
2181 intlist__delete(symbol_conf.pid_list);
2183 strlist__delete(symbol_conf.comm_list);
2185 strlist__delete(symbol_conf.dso_list);
2189 void symbol__exit(void)
2191 if (!symbol_conf.initialized)
2193 strlist__delete(symbol_conf.bt_stop_list);
2194 strlist__delete(symbol_conf.sym_list);
2195 strlist__delete(symbol_conf.dso_list);
2196 strlist__delete(symbol_conf.comm_list);
2197 intlist__delete(symbol_conf.tid_list);
2198 intlist__delete(symbol_conf.pid_list);
2199 vmlinux_path__exit();
2200 symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL;
2201 symbol_conf.bt_stop_list = NULL;
2202 symbol_conf.initialized = false;
2205 int symbol__config_symfs(const struct option *opt __maybe_unused,
2206 const char *dir, int unset __maybe_unused)
2211 symbol_conf.symfs = strdup(dir);
2212 if (symbol_conf.symfs == NULL)
2215 /* skip the locally configured cache if a symfs is given, and
2216 * config buildid dir to symfs/.debug
2218 ret = asprintf(&bf, "%s/%s", dir, ".debug");
2222 set_buildid_dir(bf);
2228 struct mem_info *mem_info__get(struct mem_info *mi)
2231 refcount_inc(&mi->refcnt);
2235 void mem_info__put(struct mem_info *mi)
2237 if (mi && refcount_dec_and_test(&mi->refcnt))
2241 struct mem_info *mem_info__new(void)
2243 struct mem_info *mi = zalloc(sizeof(*mi));
2246 refcount_set(&mi->refcnt, 1);