23 #include <symbol/kallsyms.h>
24 #include <sys/utsname.h>
26 static int dso__load_kernel_sym(struct dso
*dso
, struct map
*map
,
27 symbol_filter_t filter
);
28 static int dso__load_guest_kernel_sym(struct dso
*dso
, struct map
*map
,
29 symbol_filter_t filter
);
30 int vmlinux_path__nr_entries
;
33 struct symbol_conf symbol_conf
= {
35 .try_vmlinux_path
= true,
38 .demangle_kernel
= false,
39 .cumulate_callchain
= true,
40 .show_hist_headers
= true,
44 static enum dso_binary_type binary_type_symtab
[] = {
45 DSO_BINARY_TYPE__KALLSYMS
,
46 DSO_BINARY_TYPE__GUEST_KALLSYMS
,
47 DSO_BINARY_TYPE__JAVA_JIT
,
48 DSO_BINARY_TYPE__DEBUGLINK
,
49 DSO_BINARY_TYPE__BUILD_ID_CACHE
,
50 DSO_BINARY_TYPE__FEDORA_DEBUGINFO
,
51 DSO_BINARY_TYPE__UBUNTU_DEBUGINFO
,
52 DSO_BINARY_TYPE__BUILDID_DEBUGINFO
,
53 DSO_BINARY_TYPE__SYSTEM_PATH_DSO
,
54 DSO_BINARY_TYPE__GUEST_KMODULE
,
55 DSO_BINARY_TYPE__GUEST_KMODULE_COMP
,
56 DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE
,
57 DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP
,
58 DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO
,
59 DSO_BINARY_TYPE__NOT_FOUND
,
62 #define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab)
64 bool symbol_type__is_a(char symbol_type
, enum map_type map_type
)
66 symbol_type
= toupper(symbol_type
);
70 return symbol_type
== 'T' || symbol_type
== 'W';
72 return symbol_type
== 'D';
78 static int prefix_underscores_count(const char *str
)
80 const char *tail
= str
;
88 int __weak
arch__choose_best_symbol(struct symbol
*syma
,
89 struct symbol
*symb __maybe_unused
)
91 /* Avoid "SyS" kernel syscall aliases */
92 if (strlen(syma
->name
) >= 3 && !strncmp(syma
->name
, "SyS", 3))
94 if (strlen(syma
->name
) >= 10 && !strncmp(syma
->name
, "compat_SyS", 10))
100 static int choose_best_symbol(struct symbol
*syma
, struct symbol
*symb
)
106 /* Prefer a symbol with non zero length */
107 a
= syma
->end
- syma
->start
;
108 b
= symb
->end
- symb
->start
;
109 if ((b
== 0) && (a
> 0))
111 else if ((a
== 0) && (b
> 0))
114 /* Prefer a non weak symbol over a weak one */
115 a
= syma
->binding
== STB_WEAK
;
116 b
= symb
->binding
== STB_WEAK
;
122 /* Prefer a global symbol over a non global one */
123 a
= syma
->binding
== STB_GLOBAL
;
124 b
= symb
->binding
== STB_GLOBAL
;
130 /* Prefer a symbol with less underscores */
131 a
= prefix_underscores_count(syma
->name
);
132 b
= prefix_underscores_count(symb
->name
);
138 /* Choose the symbol with the longest name */
139 na
= strlen(syma
->name
);
140 nb
= strlen(symb
->name
);
146 return arch__choose_best_symbol(syma
, symb
);
149 void symbols__fixup_duplicate(struct rb_root
*symbols
)
152 struct symbol
*curr
, *next
;
154 nd
= rb_first(symbols
);
157 curr
= rb_entry(nd
, struct symbol
, rb_node
);
159 nd
= rb_next(&curr
->rb_node
);
160 next
= rb_entry(nd
, struct symbol
, rb_node
);
165 if (curr
->start
!= next
->start
)
168 if (choose_best_symbol(curr
, next
) == SYMBOL_A
) {
169 rb_erase(&next
->rb_node
, symbols
);
170 symbol__delete(next
);
173 nd
= rb_next(&curr
->rb_node
);
174 rb_erase(&curr
->rb_node
, symbols
);
175 symbol__delete(curr
);
180 void symbols__fixup_end(struct rb_root
*symbols
)
182 struct rb_node
*nd
, *prevnd
= rb_first(symbols
);
183 struct symbol
*curr
, *prev
;
188 curr
= rb_entry(prevnd
, struct symbol
, rb_node
);
190 for (nd
= rb_next(prevnd
); nd
; nd
= rb_next(nd
)) {
192 curr
= rb_entry(nd
, struct symbol
, rb_node
);
194 if (prev
->end
== prev
->start
&& prev
->end
!= curr
->start
)
195 prev
->end
= curr
->start
;
199 if (curr
->end
== curr
->start
)
200 curr
->end
= roundup(curr
->start
, 4096);
203 void __map_groups__fixup_end(struct map_groups
*mg
, enum map_type type
)
205 struct maps
*maps
= &mg
->maps
[type
];
206 struct map
*next
, *curr
;
208 pthread_rwlock_wrlock(&maps
->lock
);
210 curr
= maps__first(maps
);
214 for (next
= map__next(curr
); next
; next
= map__next(curr
)) {
215 curr
->end
= next
->start
;
220 * We still haven't the actual symbols, so guess the
221 * last map final address.
226 pthread_rwlock_unlock(&maps
->lock
);
229 struct symbol
*symbol__new(u64 start
, u64 len
, u8 binding
, const char *name
)
231 size_t namelen
= strlen(name
) + 1;
232 struct symbol
*sym
= calloc(1, (symbol_conf
.priv_size
+
233 sizeof(*sym
) + namelen
));
237 if (symbol_conf
.priv_size
)
238 sym
= ((void *)sym
) + symbol_conf
.priv_size
;
241 sym
->end
= len
? start
+ len
: start
;
242 sym
->binding
= binding
;
243 sym
->namelen
= namelen
- 1;
245 pr_debug4("%s: %s %#" PRIx64
"-%#" PRIx64
"\n",
246 __func__
, name
, start
, sym
->end
);
247 memcpy(sym
->name
, name
, namelen
);
252 void symbol__delete(struct symbol
*sym
)
254 free(((void *)sym
) - symbol_conf
.priv_size
);
257 size_t symbol__fprintf(struct symbol
*sym
, FILE *fp
)
259 return fprintf(fp
, " %" PRIx64
"-%" PRIx64
" %c %s\n",
260 sym
->start
, sym
->end
,
261 sym
->binding
== STB_GLOBAL
? 'g' :
262 sym
->binding
== STB_LOCAL
? 'l' : 'w',
266 size_t symbol__fprintf_symname_offs(const struct symbol
*sym
,
267 const struct addr_location
*al
, FILE *fp
)
269 unsigned long offset
;
272 if (sym
&& sym
->name
) {
273 length
= fprintf(fp
, "%s", sym
->name
);
275 if (al
->addr
< sym
->end
)
276 offset
= al
->addr
- sym
->start
;
278 offset
= al
->addr
- al
->map
->start
- sym
->start
;
279 length
+= fprintf(fp
, "+0x%lx", offset
);
283 return fprintf(fp
, "[unknown]");
286 size_t symbol__fprintf_symname(const struct symbol
*sym
, FILE *fp
)
288 return symbol__fprintf_symname_offs(sym
, NULL
, fp
);
291 void symbols__delete(struct rb_root
*symbols
)
294 struct rb_node
*next
= rb_first(symbols
);
297 pos
= rb_entry(next
, struct symbol
, rb_node
);
298 next
= rb_next(&pos
->rb_node
);
299 rb_erase(&pos
->rb_node
, symbols
);
304 void symbols__insert(struct rb_root
*symbols
, struct symbol
*sym
)
306 struct rb_node
**p
= &symbols
->rb_node
;
307 struct rb_node
*parent
= NULL
;
308 const u64 ip
= sym
->start
;
313 s
= rb_entry(parent
, struct symbol
, rb_node
);
319 rb_link_node(&sym
->rb_node
, parent
, p
);
320 rb_insert_color(&sym
->rb_node
, symbols
);
323 static struct symbol
*symbols__find(struct rb_root
*symbols
, u64 ip
)
330 n
= symbols
->rb_node
;
333 struct symbol
*s
= rb_entry(n
, struct symbol
, rb_node
);
337 else if (ip
>= s
->end
)
346 static struct symbol
*symbols__first(struct rb_root
*symbols
)
348 struct rb_node
*n
= rb_first(symbols
);
351 return rb_entry(n
, struct symbol
, rb_node
);
356 static struct symbol
*symbols__next(struct symbol
*sym
)
358 struct rb_node
*n
= rb_next(&sym
->rb_node
);
361 return rb_entry(n
, struct symbol
, rb_node
);
366 struct symbol_name_rb_node
{
367 struct rb_node rb_node
;
371 static void symbols__insert_by_name(struct rb_root
*symbols
, struct symbol
*sym
)
373 struct rb_node
**p
= &symbols
->rb_node
;
374 struct rb_node
*parent
= NULL
;
375 struct symbol_name_rb_node
*symn
, *s
;
377 symn
= container_of(sym
, struct symbol_name_rb_node
, sym
);
381 s
= rb_entry(parent
, struct symbol_name_rb_node
, rb_node
);
382 if (strcmp(sym
->name
, s
->sym
.name
) < 0)
387 rb_link_node(&symn
->rb_node
, parent
, p
);
388 rb_insert_color(&symn
->rb_node
, symbols
);
391 static void symbols__sort_by_name(struct rb_root
*symbols
,
392 struct rb_root
*source
)
396 for (nd
= rb_first(source
); nd
; nd
= rb_next(nd
)) {
397 struct symbol
*pos
= rb_entry(nd
, struct symbol
, rb_node
);
398 symbols__insert_by_name(symbols
, pos
);
402 static struct symbol
*symbols__find_by_name(struct rb_root
*symbols
,
406 struct symbol_name_rb_node
*s
= NULL
;
411 n
= symbols
->rb_node
;
416 s
= rb_entry(n
, struct symbol_name_rb_node
, rb_node
);
417 cmp
= arch__compare_symbol_names(name
, s
->sym
.name
);
430 /* return first symbol that has same name (if any) */
431 for (n
= rb_prev(n
); n
; n
= rb_prev(n
)) {
432 struct symbol_name_rb_node
*tmp
;
434 tmp
= rb_entry(n
, struct symbol_name_rb_node
, rb_node
);
435 if (arch__compare_symbol_names(tmp
->sym
.name
, s
->sym
.name
))
444 void dso__reset_find_symbol_cache(struct dso
*dso
)
448 for (type
= MAP__FUNCTION
; type
<= MAP__VARIABLE
; ++type
) {
449 dso
->last_find_result
[type
].addr
= 0;
450 dso
->last_find_result
[type
].symbol
= NULL
;
454 struct symbol
*dso__find_symbol(struct dso
*dso
,
455 enum map_type type
, u64 addr
)
457 if (dso
->last_find_result
[type
].addr
!= addr
) {
458 dso
->last_find_result
[type
].addr
= addr
;
459 dso
->last_find_result
[type
].symbol
= symbols__find(&dso
->symbols
[type
], addr
);
462 return dso
->last_find_result
[type
].symbol
;
465 struct symbol
*dso__first_symbol(struct dso
*dso
, enum map_type type
)
467 return symbols__first(&dso
->symbols
[type
]);
470 struct symbol
*dso__next_symbol(struct symbol
*sym
)
472 return symbols__next(sym
);
475 struct symbol
*symbol__next_by_name(struct symbol
*sym
)
477 struct symbol_name_rb_node
*s
= container_of(sym
, struct symbol_name_rb_node
, sym
);
478 struct rb_node
*n
= rb_next(&s
->rb_node
);
480 return n
? &rb_entry(n
, struct symbol_name_rb_node
, rb_node
)->sym
: NULL
;
484 * Teturns first symbol that matched with @name.
486 struct symbol
*dso__find_symbol_by_name(struct dso
*dso
, enum map_type type
,
489 return symbols__find_by_name(&dso
->symbol_names
[type
], name
);
492 void dso__sort_by_name(struct dso
*dso
, enum map_type type
)
494 dso__set_sorted_by_name(dso
, type
);
495 return symbols__sort_by_name(&dso
->symbol_names
[type
],
496 &dso
->symbols
[type
]);
499 size_t dso__fprintf_symbols_by_name(struct dso
*dso
,
500 enum map_type type
, FILE *fp
)
504 struct symbol_name_rb_node
*pos
;
506 for (nd
= rb_first(&dso
->symbol_names
[type
]); nd
; nd
= rb_next(nd
)) {
507 pos
= rb_entry(nd
, struct symbol_name_rb_node
, rb_node
);
508 fprintf(fp
, "%s\n", pos
->sym
.name
);
514 int modules__parse(const char *filename
, void *arg
,
515 int (*process_module
)(void *arg
, const char *name
,
523 file
= fopen(filename
, "r");
533 line_len
= getline(&line
, &n
, file
);
546 line
[--line_len
] = '\0'; /* \n */
548 sep
= strrchr(line
, 'x');
552 hex2u64(sep
+ 1, &start
);
554 sep
= strchr(line
, ' ');
560 scnprintf(name
, sizeof(name
), "[%s]", line
);
562 err
= process_module(arg
, name
, start
);
572 struct process_kallsyms_args
{
578 * These are symbols in the kernel image, so make sure that
579 * sym is from a kernel DSO.
581 bool symbol__is_idle(struct symbol
*sym
)
583 const char * const idle_symbols
[] = {
592 "mwait_idle_with_hints",
594 "ppc64_runlatch_off",
595 "pseries_dedicated_idle_sleep",
604 for (i
= 0; idle_symbols
[i
]; i
++) {
605 if (!strcmp(idle_symbols
[i
], sym
->name
))
612 static int map__process_kallsym_symbol(void *arg
, const char *name
,
613 char type
, u64 start
)
616 struct process_kallsyms_args
*a
= arg
;
617 struct rb_root
*root
= &a
->dso
->symbols
[a
->map
->type
];
619 if (!symbol_type__is_a(type
, a
->map
->type
))
623 * module symbols are not sorted so we add all
624 * symbols, setting length to 0, and rely on
625 * symbols__fixup_end() to fix it up.
627 sym
= symbol__new(start
, 0, kallsyms2elf_binding(type
), name
);
631 * We will pass the symbols to the filter later, in
632 * map__split_kallsyms, when we have split the maps per module
634 symbols__insert(root
, sym
);
640 * Loads the function entries in /proc/kallsyms into kernel_map->dso,
641 * so that we can in the next step set the symbol ->end address and then
642 * call kernel_maps__split_kallsyms.
644 static int dso__load_all_kallsyms(struct dso
*dso
, const char *filename
,
647 struct process_kallsyms_args args
= { .map
= map
, .dso
= dso
, };
648 return kallsyms__parse(filename
, &args
, map__process_kallsym_symbol
);
651 static int dso__split_kallsyms_for_kcore(struct dso
*dso
, struct map
*map
,
652 symbol_filter_t filter
)
654 struct map_groups
*kmaps
= map__kmaps(map
);
655 struct map
*curr_map
;
658 struct rb_root old_root
= dso
->symbols
[map
->type
];
659 struct rb_root
*root
= &dso
->symbols
[map
->type
];
660 struct rb_node
*next
= rb_first(root
);
670 pos
= rb_entry(next
, struct symbol
, rb_node
);
671 next
= rb_next(&pos
->rb_node
);
673 rb_erase_init(&pos
->rb_node
, &old_root
);
675 module
= strchr(pos
->name
, '\t');
679 curr_map
= map_groups__find(kmaps
, map
->type
, pos
->start
);
681 if (!curr_map
|| (filter
&& filter(curr_map
, pos
))) {
686 pos
->start
-= curr_map
->start
- curr_map
->pgoff
;
688 pos
->end
-= curr_map
->start
- curr_map
->pgoff
;
689 symbols__insert(&curr_map
->dso
->symbols
[curr_map
->type
], pos
);
693 /* Symbols have been adjusted */
694 dso
->adjust_symbols
= 1;
700 * Split the symbols into maps, making sure there are no overlaps, i.e. the
701 * kernel range is broken in several maps, named [kernel].N, as we don't have
702 * the original ELF section names vmlinux have.
704 static int dso__split_kallsyms(struct dso
*dso
, struct map
*map
, u64 delta
,
705 symbol_filter_t filter
)
707 struct map_groups
*kmaps
= map__kmaps(map
);
708 struct machine
*machine
;
709 struct map
*curr_map
= map
;
711 int count
= 0, moved
= 0;
712 struct rb_root
*root
= &dso
->symbols
[map
->type
];
713 struct rb_node
*next
= rb_first(root
);
714 int kernel_range
= 0;
719 machine
= kmaps
->machine
;
724 pos
= rb_entry(next
, struct symbol
, rb_node
);
725 next
= rb_next(&pos
->rb_node
);
727 module
= strchr(pos
->name
, '\t');
729 if (!symbol_conf
.use_modules
)
734 if (strcmp(curr_map
->dso
->short_name
, module
)) {
735 if (curr_map
!= map
&&
736 dso
->kernel
== DSO_TYPE_GUEST_KERNEL
&&
737 machine__is_default_guest(machine
)) {
739 * We assume all symbols of a module are
740 * continuous in * kallsyms, so curr_map
741 * points to a module and all its
742 * symbols are in its kmap. Mark it as
745 dso__set_loaded(curr_map
->dso
,
749 curr_map
= map_groups__find_by_name(kmaps
,
751 if (curr_map
== NULL
) {
752 pr_debug("%s/proc/{kallsyms,modules} "
753 "inconsistency while looking "
754 "for \"%s\" module!\n",
755 machine
->root_dir
, module
);
760 if (curr_map
->dso
->loaded
&&
761 !machine__is_default_guest(machine
))
765 * So that we look just like we get from .ko files,
766 * i.e. not prelinked, relative to map->start.
768 pos
->start
= curr_map
->map_ip(curr_map
, pos
->start
);
769 pos
->end
= curr_map
->map_ip(curr_map
, pos
->end
);
770 } else if (curr_map
!= map
) {
771 char dso_name
[PATH_MAX
];
775 /* Kernel was relocated at boot time */
785 if (dso
->kernel
== DSO_TYPE_GUEST_KERNEL
)
786 snprintf(dso_name
, sizeof(dso_name
),
790 snprintf(dso_name
, sizeof(dso_name
),
794 ndso
= dso__new(dso_name
);
798 ndso
->kernel
= dso
->kernel
;
800 curr_map
= map__new2(pos
->start
, ndso
, map
->type
);
801 if (curr_map
== NULL
) {
806 curr_map
->map_ip
= curr_map
->unmap_ip
= identity__map_ip
;
807 map_groups__insert(kmaps
, curr_map
);
810 /* Kernel was relocated at boot time */
815 if (filter
&& filter(curr_map
, pos
)) {
816 discard_symbol
: rb_erase(&pos
->rb_node
, root
);
819 if (curr_map
!= map
) {
820 rb_erase(&pos
->rb_node
, root
);
821 symbols__insert(&curr_map
->dso
->symbols
[curr_map
->type
], pos
);
828 if (curr_map
!= map
&&
829 dso
->kernel
== DSO_TYPE_GUEST_KERNEL
&&
830 machine__is_default_guest(kmaps
->machine
)) {
831 dso__set_loaded(curr_map
->dso
, curr_map
->type
);
834 return count
+ moved
;
837 bool symbol__restricted_filename(const char *filename
,
838 const char *restricted_filename
)
840 bool restricted
= false;
842 if (symbol_conf
.kptr_restrict
) {
843 char *r
= realpath(filename
, NULL
);
846 restricted
= strcmp(r
, restricted_filename
) == 0;
856 struct rb_node rb_node
;
861 static void add_module(struct module_info
*mi
, struct rb_root
*modules
)
863 struct rb_node
**p
= &modules
->rb_node
;
864 struct rb_node
*parent
= NULL
;
865 struct module_info
*m
;
869 m
= rb_entry(parent
, struct module_info
, rb_node
);
870 if (strcmp(mi
->name
, m
->name
) < 0)
875 rb_link_node(&mi
->rb_node
, parent
, p
);
876 rb_insert_color(&mi
->rb_node
, modules
);
879 static void delete_modules(struct rb_root
*modules
)
881 struct module_info
*mi
;
882 struct rb_node
*next
= rb_first(modules
);
885 mi
= rb_entry(next
, struct module_info
, rb_node
);
886 next
= rb_next(&mi
->rb_node
);
887 rb_erase(&mi
->rb_node
, modules
);
893 static struct module_info
*find_module(const char *name
,
894 struct rb_root
*modules
)
896 struct rb_node
*n
= modules
->rb_node
;
899 struct module_info
*m
;
902 m
= rb_entry(n
, struct module_info
, rb_node
);
903 cmp
= strcmp(name
, m
->name
);
915 static int __read_proc_modules(void *arg
, const char *name
, u64 start
)
917 struct rb_root
*modules
= arg
;
918 struct module_info
*mi
;
920 mi
= zalloc(sizeof(struct module_info
));
924 mi
->name
= strdup(name
);
932 add_module(mi
, modules
);
937 static int read_proc_modules(const char *filename
, struct rb_root
*modules
)
939 if (symbol__restricted_filename(filename
, "/proc/modules"))
942 if (modules__parse(filename
, modules
, __read_proc_modules
)) {
943 delete_modules(modules
);
950 int compare_proc_modules(const char *from
, const char *to
)
952 struct rb_root from_modules
= RB_ROOT
;
953 struct rb_root to_modules
= RB_ROOT
;
954 struct rb_node
*from_node
, *to_node
;
955 struct module_info
*from_m
, *to_m
;
958 if (read_proc_modules(from
, &from_modules
))
961 if (read_proc_modules(to
, &to_modules
))
962 goto out_delete_from
;
964 from_node
= rb_first(&from_modules
);
965 to_node
= rb_first(&to_modules
);
970 from_m
= rb_entry(from_node
, struct module_info
, rb_node
);
971 to_m
= rb_entry(to_node
, struct module_info
, rb_node
);
973 if (from_m
->start
!= to_m
->start
||
974 strcmp(from_m
->name
, to_m
->name
))
977 from_node
= rb_next(from_node
);
978 to_node
= rb_next(to_node
);
981 if (!from_node
&& !to_node
)
984 delete_modules(&to_modules
);
986 delete_modules(&from_modules
);
991 static int do_validate_kcore_modules(const char *filename
, struct map
*map
,
992 struct map_groups
*kmaps
)
994 struct rb_root modules
= RB_ROOT
;
998 err
= read_proc_modules(filename
, &modules
);
1002 old_map
= map_groups__first(kmaps
, map
->type
);
1004 struct map
*next
= map_groups__next(old_map
);
1005 struct module_info
*mi
;
1007 if (old_map
== map
|| old_map
->start
== map
->start
) {
1008 /* The kernel map */
1013 /* Module must be in memory at the same address */
1014 mi
= find_module(old_map
->dso
->short_name
, &modules
);
1015 if (!mi
|| mi
->start
!= old_map
->start
) {
1023 delete_modules(&modules
);
1028 * If kallsyms is referenced by name then we look for filename in the same
1031 static bool filename_from_kallsyms_filename(char *filename
,
1032 const char *base_name
,
1033 const char *kallsyms_filename
)
1037 strcpy(filename
, kallsyms_filename
);
1038 name
= strrchr(filename
, '/');
1044 if (!strcmp(name
, "kallsyms")) {
1045 strcpy(name
, base_name
);
1052 static int validate_kcore_modules(const char *kallsyms_filename
,
1055 struct map_groups
*kmaps
= map__kmaps(map
);
1056 char modules_filename
[PATH_MAX
];
1061 if (!filename_from_kallsyms_filename(modules_filename
, "modules",
1065 if (do_validate_kcore_modules(modules_filename
, map
, kmaps
))
1071 static int validate_kcore_addresses(const char *kallsyms_filename
,
1074 struct kmap
*kmap
= map__kmap(map
);
1079 if (kmap
->ref_reloc_sym
&& kmap
->ref_reloc_sym
->name
) {
1082 start
= kallsyms__get_function_start(kallsyms_filename
,
1083 kmap
->ref_reloc_sym
->name
);
1084 if (start
!= kmap
->ref_reloc_sym
->addr
)
1088 return validate_kcore_modules(kallsyms_filename
, map
);
1091 struct kcore_mapfn_data
{
1094 struct list_head maps
;
1097 static int kcore_mapfn(u64 start
, u64 len
, u64 pgoff
, void *data
)
1099 struct kcore_mapfn_data
*md
= data
;
1102 map
= map__new2(start
, md
->dso
, md
->type
);
1106 map
->end
= map
->start
+ len
;
1109 list_add(&map
->node
, &md
->maps
);
1114 static int dso__load_kcore(struct dso
*dso
, struct map
*map
,
1115 const char *kallsyms_filename
)
1117 struct map_groups
*kmaps
= map__kmaps(map
);
1118 struct machine
*machine
;
1119 struct kcore_mapfn_data md
;
1120 struct map
*old_map
, *new_map
, *replacement_map
= NULL
;
1123 char kcore_filename
[PATH_MAX
];
1129 machine
= kmaps
->machine
;
1131 /* This function requires that the map is the kernel map */
1132 if (map
!= machine
->vmlinux_maps
[map
->type
])
1135 if (!filename_from_kallsyms_filename(kcore_filename
, "kcore",
1139 /* Modules and kernel must be present at their original addresses */
1140 if (validate_kcore_addresses(kallsyms_filename
, map
))
1144 md
.type
= map
->type
;
1145 INIT_LIST_HEAD(&md
.maps
);
1147 fd
= open(kcore_filename
, O_RDONLY
);
1149 pr_debug("Failed to open %s. Note /proc/kcore requires CAP_SYS_RAWIO capability to access.\n",
1154 /* Read new maps into temporary lists */
1155 err
= file__read_maps(fd
, md
.type
== MAP__FUNCTION
, kcore_mapfn
, &md
,
1159 dso
->is_64_bit
= is_64_bit
;
1161 if (list_empty(&md
.maps
)) {
1166 /* Remove old maps */
1167 old_map
= map_groups__first(kmaps
, map
->type
);
1169 struct map
*next
= map_groups__next(old_map
);
1172 map_groups__remove(kmaps
, old_map
);
1176 /* Find the kernel map using the first symbol */
1177 sym
= dso__first_symbol(dso
, map
->type
);
1178 list_for_each_entry(new_map
, &md
.maps
, node
) {
1179 if (sym
&& sym
->start
>= new_map
->start
&&
1180 sym
->start
< new_map
->end
) {
1181 replacement_map
= new_map
;
1186 if (!replacement_map
)
1187 replacement_map
= list_entry(md
.maps
.next
, struct map
, node
);
1190 while (!list_empty(&md
.maps
)) {
1191 new_map
= list_entry(md
.maps
.next
, struct map
, node
);
1192 list_del_init(&new_map
->node
);
1193 if (new_map
== replacement_map
) {
1194 map
->start
= new_map
->start
;
1195 map
->end
= new_map
->end
;
1196 map
->pgoff
= new_map
->pgoff
;
1197 map
->map_ip
= new_map
->map_ip
;
1198 map
->unmap_ip
= new_map
->unmap_ip
;
1199 /* Ensure maps are correctly ordered */
1201 map_groups__remove(kmaps
, map
);
1202 map_groups__insert(kmaps
, map
);
1205 map_groups__insert(kmaps
, new_map
);
1212 * Set the data type and long name so that kcore can be read via
1213 * dso__data_read_addr().
1215 if (dso
->kernel
== DSO_TYPE_GUEST_KERNEL
)
1216 dso
->binary_type
= DSO_BINARY_TYPE__GUEST_KCORE
;
1218 dso
->binary_type
= DSO_BINARY_TYPE__KCORE
;
1219 dso__set_long_name(dso
, strdup(kcore_filename
), true);
1223 if (map
->type
== MAP__FUNCTION
)
1224 pr_debug("Using %s for kernel object code\n", kcore_filename
);
1226 pr_debug("Using %s for kernel data\n", kcore_filename
);
1231 while (!list_empty(&md
.maps
)) {
1232 map
= list_entry(md
.maps
.next
, struct map
, node
);
1233 list_del_init(&map
->node
);
1241 * If the kernel is relocated at boot time, kallsyms won't match. Compute the
1242 * delta based on the relocation reference symbol.
1244 static int kallsyms__delta(struct map
*map
, const char *filename
, u64
*delta
)
1246 struct kmap
*kmap
= map__kmap(map
);
1252 if (!kmap
->ref_reloc_sym
|| !kmap
->ref_reloc_sym
->name
)
1255 addr
= kallsyms__get_function_start(filename
,
1256 kmap
->ref_reloc_sym
->name
);
1260 *delta
= addr
- kmap
->ref_reloc_sym
->addr
;
1264 int dso__load_kallsyms(struct dso
*dso
, const char *filename
,
1265 struct map
*map
, symbol_filter_t filter
)
1269 if (symbol__restricted_filename(filename
, "/proc/kallsyms"))
1272 if (dso__load_all_kallsyms(dso
, filename
, map
) < 0)
1275 if (kallsyms__delta(map
, filename
, &delta
))
1278 symbols__fixup_duplicate(&dso
->symbols
[map
->type
]);
1279 symbols__fixup_end(&dso
->symbols
[map
->type
]);
1281 if (dso
->kernel
== DSO_TYPE_GUEST_KERNEL
)
1282 dso
->symtab_type
= DSO_BINARY_TYPE__GUEST_KALLSYMS
;
1284 dso
->symtab_type
= DSO_BINARY_TYPE__KALLSYMS
;
1286 if (!dso__load_kcore(dso
, map
, filename
))
1287 return dso__split_kallsyms_for_kcore(dso
, map
, filter
);
1289 return dso__split_kallsyms(dso
, map
, delta
, filter
);
1292 static int dso__load_perf_map(struct dso
*dso
, struct map
*map
,
1293 symbol_filter_t filter
)
1300 file
= fopen(dso
->long_name
, "r");
1304 while (!feof(file
)) {
1309 line_len
= getline(&line
, &n
, file
);
1316 line
[--line_len
] = '\0'; /* \n */
1318 len
= hex2u64(line
, &start
);
1321 if (len
+ 2 >= line_len
)
1324 len
+= hex2u64(line
+ len
, &size
);
1327 if (len
+ 2 >= line_len
)
1330 sym
= symbol__new(start
, size
, STB_GLOBAL
, line
+ len
);
1333 goto out_delete_line
;
1335 if (filter
&& filter(map
, sym
))
1336 symbol__delete(sym
);
1338 symbols__insert(&dso
->symbols
[map
->type
], sym
);
1354 static bool dso__is_compatible_symtab_type(struct dso
*dso
, bool kmod
,
1355 enum dso_binary_type type
)
1358 case DSO_BINARY_TYPE__JAVA_JIT
:
1359 case DSO_BINARY_TYPE__DEBUGLINK
:
1360 case DSO_BINARY_TYPE__SYSTEM_PATH_DSO
:
1361 case DSO_BINARY_TYPE__FEDORA_DEBUGINFO
:
1362 case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO
:
1363 case DSO_BINARY_TYPE__BUILDID_DEBUGINFO
:
1364 case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO
:
1365 return !kmod
&& dso
->kernel
== DSO_TYPE_USER
;
1367 case DSO_BINARY_TYPE__KALLSYMS
:
1368 case DSO_BINARY_TYPE__VMLINUX
:
1369 case DSO_BINARY_TYPE__KCORE
:
1370 return dso
->kernel
== DSO_TYPE_KERNEL
;
1372 case DSO_BINARY_TYPE__GUEST_KALLSYMS
:
1373 case DSO_BINARY_TYPE__GUEST_VMLINUX
:
1374 case DSO_BINARY_TYPE__GUEST_KCORE
:
1375 return dso
->kernel
== DSO_TYPE_GUEST_KERNEL
;
1377 case DSO_BINARY_TYPE__GUEST_KMODULE
:
1378 case DSO_BINARY_TYPE__GUEST_KMODULE_COMP
:
1379 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE
:
1380 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP
:
1382 * kernel modules know their symtab type - it's set when
1383 * creating a module dso in machine__findnew_module_map().
1385 return kmod
&& dso
->symtab_type
== type
;
1387 case DSO_BINARY_TYPE__BUILD_ID_CACHE
:
1390 case DSO_BINARY_TYPE__NOT_FOUND
:
1396 int dso__load(struct dso
*dso
, struct map
*map
, symbol_filter_t filter
)
1401 struct machine
*machine
;
1402 char *root_dir
= (char *) "";
1404 struct symsrc ss_
[2];
1405 struct symsrc
*syms_ss
= NULL
, *runtime_ss
= NULL
;
1407 unsigned char build_id
[BUILD_ID_SIZE
];
1409 pthread_mutex_lock(&dso
->lock
);
1411 /* check again under the dso->lock */
1412 if (dso__loaded(dso
, map
->type
)) {
1418 if (dso
->kernel
== DSO_TYPE_KERNEL
)
1419 ret
= dso__load_kernel_sym(dso
, map
, filter
);
1420 else if (dso
->kernel
== DSO_TYPE_GUEST_KERNEL
)
1421 ret
= dso__load_guest_kernel_sym(dso
, map
, filter
);
1426 if (map
->groups
&& map
->groups
->machine
)
1427 machine
= map
->groups
->machine
;
1431 dso
->adjust_symbols
= 0;
1433 if (strncmp(dso
->name
, "/tmp/perf-", 10) == 0) {
1436 if (lstat(dso
->name
, &st
) < 0)
1439 if (!symbol_conf
.force
&& st
.st_uid
&& (st
.st_uid
!= geteuid())) {
1440 pr_warning("File %s not owned by current user or root, "
1441 "ignoring it (use -f to override).\n", dso
->name
);
1445 ret
= dso__load_perf_map(dso
, map
, filter
);
1446 dso
->symtab_type
= ret
> 0 ? DSO_BINARY_TYPE__JAVA_JIT
:
1447 DSO_BINARY_TYPE__NOT_FOUND
;
1452 root_dir
= machine
->root_dir
;
1454 name
= malloc(PATH_MAX
);
1458 kmod
= dso
->symtab_type
== DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE
||
1459 dso
->symtab_type
== DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP
||
1460 dso
->symtab_type
== DSO_BINARY_TYPE__GUEST_KMODULE
||
1461 dso
->symtab_type
== DSO_BINARY_TYPE__GUEST_KMODULE_COMP
;
1465 * Read the build id if possible. This is required for
1466 * DSO_BINARY_TYPE__BUILDID_DEBUGINFO to work
1468 if (filename__read_build_id(dso
->name
, build_id
, BUILD_ID_SIZE
) > 0)
1469 dso__set_build_id(dso
, build_id
);
1472 * Iterate over candidate debug images.
1473 * Keep track of "interesting" ones (those which have a symtab, dynsym,
1474 * and/or opd section) for processing.
1476 for (i
= 0; i
< DSO_BINARY_TYPE__SYMTAB_CNT
; i
++) {
1477 struct symsrc
*ss
= &ss_
[ss_pos
];
1478 bool next_slot
= false;
1480 enum dso_binary_type symtab_type
= binary_type_symtab
[i
];
1482 if (!dso__is_compatible_symtab_type(dso
, kmod
, symtab_type
))
1485 if (dso__read_binary_type_filename(dso
, symtab_type
,
1486 root_dir
, name
, PATH_MAX
))
1489 /* Name is now the name of the next image to try */
1490 if (symsrc__init(ss
, dso
, name
, symtab_type
) < 0)
1493 if (!syms_ss
&& symsrc__has_symtab(ss
)) {
1496 if (!dso
->symsrc_filename
)
1497 dso
->symsrc_filename
= strdup(name
);
1500 if (!runtime_ss
&& symsrc__possibly_runtime(ss
)) {
1508 if (syms_ss
&& runtime_ss
)
1511 symsrc__destroy(ss
);
1516 if (!runtime_ss
&& !syms_ss
)
1519 if (runtime_ss
&& !syms_ss
) {
1520 syms_ss
= runtime_ss
;
1523 /* We'll have to hope for the best */
1524 if (!runtime_ss
&& syms_ss
)
1525 runtime_ss
= syms_ss
;
1528 ret
= dso__load_sym(dso
, map
, syms_ss
, runtime_ss
, filter
, kmod
);
1535 nr_plt
= dso__synthesize_plt_symbols(dso
, runtime_ss
, map
, filter
);
1540 for (; ss_pos
> 0; ss_pos
--)
1541 symsrc__destroy(&ss_
[ss_pos
- 1]);
1544 if (ret
< 0 && strstr(dso
->name
, " (deleted)") != NULL
)
1547 dso__set_loaded(dso
, map
->type
);
1548 pthread_mutex_unlock(&dso
->lock
);
1553 struct map
*map_groups__find_by_name(struct map_groups
*mg
,
1554 enum map_type type
, const char *name
)
1556 struct maps
*maps
= &mg
->maps
[type
];
1559 pthread_rwlock_rdlock(&maps
->lock
);
1561 for (map
= maps__first(maps
); map
; map
= map__next(map
)) {
1562 if (map
->dso
&& strcmp(map
->dso
->short_name
, name
) == 0)
1569 pthread_rwlock_unlock(&maps
->lock
);
1573 int dso__load_vmlinux(struct dso
*dso
, struct map
*map
,
1574 const char *vmlinux
, bool vmlinux_allocated
,
1575 symbol_filter_t filter
)
1579 char symfs_vmlinux
[PATH_MAX
];
1580 enum dso_binary_type symtab_type
;
1582 if (vmlinux
[0] == '/')
1583 snprintf(symfs_vmlinux
, sizeof(symfs_vmlinux
), "%s", vmlinux
);
1585 symbol__join_symfs(symfs_vmlinux
, vmlinux
);
1587 if (dso
->kernel
== DSO_TYPE_GUEST_KERNEL
)
1588 symtab_type
= DSO_BINARY_TYPE__GUEST_VMLINUX
;
1590 symtab_type
= DSO_BINARY_TYPE__VMLINUX
;
1592 if (symsrc__init(&ss
, dso
, symfs_vmlinux
, symtab_type
))
1595 err
= dso__load_sym(dso
, map
, &ss
, &ss
, filter
, 0);
1596 symsrc__destroy(&ss
);
1599 if (dso
->kernel
== DSO_TYPE_GUEST_KERNEL
)
1600 dso
->binary_type
= DSO_BINARY_TYPE__GUEST_VMLINUX
;
1602 dso
->binary_type
= DSO_BINARY_TYPE__VMLINUX
;
1603 dso__set_long_name(dso
, vmlinux
, vmlinux_allocated
);
1604 dso__set_loaded(dso
, map
->type
);
1605 pr_debug("Using %s for symbols\n", symfs_vmlinux
);
1611 int dso__load_vmlinux_path(struct dso
*dso
, struct map
*map
,
1612 symbol_filter_t filter
)
1615 char *filename
= NULL
;
1617 pr_debug("Looking at the vmlinux_path (%d entries long)\n",
1618 vmlinux_path__nr_entries
+ 1);
1620 for (i
= 0; i
< vmlinux_path__nr_entries
; ++i
) {
1621 err
= dso__load_vmlinux(dso
, map
, vmlinux_path
[i
], false, filter
);
1626 if (!symbol_conf
.ignore_vmlinux_buildid
)
1627 filename
= dso__build_id_filename(dso
, NULL
, 0);
1628 if (filename
!= NULL
) {
1629 err
= dso__load_vmlinux(dso
, map
, filename
, true, filter
);
1638 static int find_matching_kcore(struct map
*map
, char *dir
, size_t dir_sz
)
1640 char kallsyms_filename
[PATH_MAX
];
1641 struct dirent
*dent
;
1653 if (dent
->d_type
!= DT_DIR
)
1655 scnprintf(kallsyms_filename
, sizeof(kallsyms_filename
),
1656 "%s/%s/kallsyms", dir
, dent
->d_name
);
1657 if (!validate_kcore_addresses(kallsyms_filename
, map
)) {
1658 strlcpy(dir
, kallsyms_filename
, dir_sz
);
1669 static char *dso__find_kallsyms(struct dso
*dso
, struct map
*map
)
1671 u8 host_build_id
[BUILD_ID_SIZE
];
1672 char sbuild_id
[BUILD_ID_SIZE
* 2 + 1];
1673 bool is_host
= false;
1674 char path
[PATH_MAX
];
1676 if (!dso
->has_build_id
) {
1678 * Last resort, if we don't have a build-id and couldn't find
1679 * any vmlinux file, try the running kernel kallsyms table.
1684 if (sysfs__read_build_id("/sys/kernel/notes", host_build_id
,
1685 sizeof(host_build_id
)) == 0)
1686 is_host
= dso__build_id_equal(dso
, host_build_id
);
1688 build_id__sprintf(dso
->build_id
, sizeof(dso
->build_id
), sbuild_id
);
1690 scnprintf(path
, sizeof(path
), "%s/[kernel.kcore]/%s", buildid_dir
,
1693 /* Use /proc/kallsyms if possible */
1698 /* If no cached kcore go with /proc/kallsyms */
1705 * Do not check the build-id cache, until we know we cannot use
1708 fd
= open("/proc/kcore", O_RDONLY
);
1711 /* If module maps match go with /proc/kallsyms */
1712 if (!validate_kcore_addresses("/proc/kallsyms", map
))
1716 /* Find kallsyms in build-id cache with kcore */
1717 if (!find_matching_kcore(map
, path
, sizeof(path
)))
1718 return strdup(path
);
1723 /* Find kallsyms in build-id cache with kcore */
1724 if (!find_matching_kcore(map
, path
, sizeof(path
)))
1725 return strdup(path
);
1727 scnprintf(path
, sizeof(path
), "%s/[kernel.kallsyms]/%s",
1728 buildid_dir
, sbuild_id
);
1730 if (access(path
, F_OK
)) {
1731 pr_err("No kallsyms or vmlinux with build-id %s was found\n",
1736 return strdup(path
);
1739 return strdup("/proc/kallsyms");
1742 static int dso__load_kernel_sym(struct dso
*dso
, struct map
*map
,
1743 symbol_filter_t filter
)
1746 const char *kallsyms_filename
= NULL
;
1747 char *kallsyms_allocated_filename
= NULL
;
1749 * Step 1: if the user specified a kallsyms or vmlinux filename, use
1750 * it and only it, reporting errors to the user if it cannot be used.
1752 * For instance, try to analyse an ARM perf.data file _without_ a
1753 * build-id, or if the user specifies the wrong path to the right
1754 * vmlinux file, obviously we can't fallback to another vmlinux (a
1755 * x86_86 one, on the machine where analysis is being performed, say),
1756 * or worse, /proc/kallsyms.
1758 * If the specified file _has_ a build-id and there is a build-id
1759 * section in the perf.data file, we will still do the expected
1760 * validation in dso__load_vmlinux and will bail out if they don't
1763 if (symbol_conf
.kallsyms_name
!= NULL
) {
1764 kallsyms_filename
= symbol_conf
.kallsyms_name
;
1768 if (!symbol_conf
.ignore_vmlinux
&& symbol_conf
.vmlinux_name
!= NULL
) {
1769 return dso__load_vmlinux(dso
, map
, symbol_conf
.vmlinux_name
,
1773 if (!symbol_conf
.ignore_vmlinux
&& vmlinux_path
!= NULL
) {
1774 err
= dso__load_vmlinux_path(dso
, map
, filter
);
1779 /* do not try local files if a symfs was given */
1780 if (symbol_conf
.symfs
[0] != 0)
1783 kallsyms_allocated_filename
= dso__find_kallsyms(dso
, map
);
1784 if (!kallsyms_allocated_filename
)
1787 kallsyms_filename
= kallsyms_allocated_filename
;
1790 err
= dso__load_kallsyms(dso
, kallsyms_filename
, map
, filter
);
1792 pr_debug("Using %s for symbols\n", kallsyms_filename
);
1793 free(kallsyms_allocated_filename
);
1795 if (err
> 0 && !dso__is_kcore(dso
)) {
1796 dso
->binary_type
= DSO_BINARY_TYPE__KALLSYMS
;
1797 dso__set_long_name(dso
, "[kernel.kallsyms]", false);
1798 map__fixup_start(map
);
1799 map__fixup_end(map
);
1805 static int dso__load_guest_kernel_sym(struct dso
*dso
, struct map
*map
,
1806 symbol_filter_t filter
)
1809 const char *kallsyms_filename
= NULL
;
1810 struct machine
*machine
;
1811 char path
[PATH_MAX
];
1814 pr_debug("Guest kernel map hasn't the point to groups\n");
1817 machine
= map
->groups
->machine
;
1819 if (machine__is_default_guest(machine
)) {
1821 * if the user specified a vmlinux filename, use it and only
1822 * it, reporting errors to the user if it cannot be used.
1823 * Or use file guest_kallsyms inputted by user on commandline
1825 if (symbol_conf
.default_guest_vmlinux_name
!= NULL
) {
1826 err
= dso__load_vmlinux(dso
, map
,
1827 symbol_conf
.default_guest_vmlinux_name
,
1832 kallsyms_filename
= symbol_conf
.default_guest_kallsyms
;
1833 if (!kallsyms_filename
)
1836 sprintf(path
, "%s/proc/kallsyms", machine
->root_dir
);
1837 kallsyms_filename
= path
;
1840 err
= dso__load_kallsyms(dso
, kallsyms_filename
, map
, filter
);
1842 pr_debug("Using %s for symbols\n", kallsyms_filename
);
1843 if (err
> 0 && !dso__is_kcore(dso
)) {
1844 dso
->binary_type
= DSO_BINARY_TYPE__GUEST_KALLSYMS
;
1845 machine__mmap_name(machine
, path
, sizeof(path
));
1846 dso__set_long_name(dso
, strdup(path
), true);
1847 map__fixup_start(map
);
1848 map__fixup_end(map
);
1854 static void vmlinux_path__exit(void)
1856 while (--vmlinux_path__nr_entries
>= 0)
1857 zfree(&vmlinux_path
[vmlinux_path__nr_entries
]);
1858 vmlinux_path__nr_entries
= 0;
1860 zfree(&vmlinux_path
);
1863 static int vmlinux_path__init(struct perf_env
*env
)
1867 char *kernel_version
;
1869 vmlinux_path
= malloc(sizeof(char *) * 6);
1870 if (vmlinux_path
== NULL
)
1873 vmlinux_path
[vmlinux_path__nr_entries
] = strdup("vmlinux");
1874 if (vmlinux_path
[vmlinux_path__nr_entries
] == NULL
)
1876 ++vmlinux_path__nr_entries
;
1877 vmlinux_path
[vmlinux_path__nr_entries
] = strdup("/boot/vmlinux");
1878 if (vmlinux_path
[vmlinux_path__nr_entries
] == NULL
)
1880 ++vmlinux_path__nr_entries
;
1882 /* only try kernel version if no symfs was given */
1883 if (symbol_conf
.symfs
[0] != 0)
1887 kernel_version
= env
->os_release
;
1889 if (uname(&uts
) < 0)
1892 kernel_version
= uts
.release
;
1895 snprintf(bf
, sizeof(bf
), "/boot/vmlinux-%s", kernel_version
);
1896 vmlinux_path
[vmlinux_path__nr_entries
] = strdup(bf
);
1897 if (vmlinux_path
[vmlinux_path__nr_entries
] == NULL
)
1899 ++vmlinux_path__nr_entries
;
1900 snprintf(bf
, sizeof(bf
), "/usr/lib/debug/boot/vmlinux-%s",
1902 vmlinux_path
[vmlinux_path__nr_entries
] = strdup(bf
);
1903 if (vmlinux_path
[vmlinux_path__nr_entries
] == NULL
)
1905 ++vmlinux_path__nr_entries
;
1906 snprintf(bf
, sizeof(bf
), "/lib/modules/%s/build/vmlinux", kernel_version
);
1907 vmlinux_path
[vmlinux_path__nr_entries
] = strdup(bf
);
1908 if (vmlinux_path
[vmlinux_path__nr_entries
] == NULL
)
1910 ++vmlinux_path__nr_entries
;
1911 snprintf(bf
, sizeof(bf
), "/usr/lib/debug/lib/modules/%s/vmlinux",
1913 vmlinux_path
[vmlinux_path__nr_entries
] = strdup(bf
);
1914 if (vmlinux_path
[vmlinux_path__nr_entries
] == NULL
)
1916 ++vmlinux_path__nr_entries
;
1921 vmlinux_path__exit();
1925 int setup_list(struct strlist
**list
, const char *list_str
,
1926 const char *list_name
)
1928 if (list_str
== NULL
)
1931 *list
= strlist__new(list_str
, NULL
);
1933 pr_err("problems parsing %s list\n", list_name
);
1937 symbol_conf
.has_filter
= true;
1941 int setup_intlist(struct intlist
**list
, const char *list_str
,
1942 const char *list_name
)
1944 if (list_str
== NULL
)
1947 *list
= intlist__new(list_str
);
1949 pr_err("problems parsing %s list\n", list_name
);
1955 static bool symbol__read_kptr_restrict(void)
1959 if (geteuid() != 0) {
1960 FILE *fp
= fopen("/proc/sys/kernel/kptr_restrict", "r");
1964 if (fgets(line
, sizeof(line
), fp
) != NULL
)
1965 value
= atoi(line
) != 0;
1974 int symbol__init(struct perf_env
*env
)
1978 if (symbol_conf
.initialized
)
1981 symbol_conf
.priv_size
= PERF_ALIGN(symbol_conf
.priv_size
, sizeof(u64
));
1985 if (symbol_conf
.sort_by_name
)
1986 symbol_conf
.priv_size
+= (sizeof(struct symbol_name_rb_node
) -
1987 sizeof(struct symbol
));
1989 if (symbol_conf
.try_vmlinux_path
&& vmlinux_path__init(env
) < 0)
1992 if (symbol_conf
.field_sep
&& *symbol_conf
.field_sep
== '.') {
1993 pr_err("'.' is the only non valid --field-separator argument\n");
1997 if (setup_list(&symbol_conf
.dso_list
,
1998 symbol_conf
.dso_list_str
, "dso") < 0)
2001 if (setup_list(&symbol_conf
.comm_list
,
2002 symbol_conf
.comm_list_str
, "comm") < 0)
2003 goto out_free_dso_list
;
2005 if (setup_intlist(&symbol_conf
.pid_list
,
2006 symbol_conf
.pid_list_str
, "pid") < 0)
2007 goto out_free_comm_list
;
2009 if (setup_intlist(&symbol_conf
.tid_list
,
2010 symbol_conf
.tid_list_str
, "tid") < 0)
2011 goto out_free_pid_list
;
2013 if (setup_list(&symbol_conf
.sym_list
,
2014 symbol_conf
.sym_list_str
, "symbol") < 0)
2015 goto out_free_tid_list
;
2018 * A path to symbols of "/" is identical to ""
2019 * reset here for simplicity.
2021 symfs
= realpath(symbol_conf
.symfs
, NULL
);
2023 symfs
= symbol_conf
.symfs
;
2024 if (strcmp(symfs
, "/") == 0)
2025 symbol_conf
.symfs
= "";
2026 if (symfs
!= symbol_conf
.symfs
)
2027 free((void *)symfs
);
2029 symbol_conf
.kptr_restrict
= symbol__read_kptr_restrict();
2031 symbol_conf
.initialized
= true;
2035 intlist__delete(symbol_conf
.tid_list
);
2037 intlist__delete(symbol_conf
.pid_list
);
2039 strlist__delete(symbol_conf
.comm_list
);
2041 strlist__delete(symbol_conf
.dso_list
);
2045 void symbol__exit(void)
2047 if (!symbol_conf
.initialized
)
2049 strlist__delete(symbol_conf
.sym_list
);
2050 strlist__delete(symbol_conf
.dso_list
);
2051 strlist__delete(symbol_conf
.comm_list
);
2052 intlist__delete(symbol_conf
.tid_list
);
2053 intlist__delete(symbol_conf
.pid_list
);
2054 vmlinux_path__exit();
2055 symbol_conf
.sym_list
= symbol_conf
.dso_list
= symbol_conf
.comm_list
= NULL
;
2056 symbol_conf
.initialized
= false;