24 #include <symbol/kallsyms.h>
25 #include <sys/utsname.h>
27 static int dso__load_kernel_sym(struct dso
*dso
, struct map
*map
);
28 static int dso__load_guest_kernel_sym(struct dso
*dso
, struct map
*map
);
29 static bool symbol__is_idle(const char *name
);
31 int vmlinux_path__nr_entries
;
34 struct symbol_conf symbol_conf
= {
36 .try_vmlinux_path
= true,
39 .demangle_kernel
= false,
40 .cumulate_callchain
= true,
41 .show_hist_headers
= true,
46 static enum dso_binary_type binary_type_symtab
[] = {
47 DSO_BINARY_TYPE__KALLSYMS
,
48 DSO_BINARY_TYPE__GUEST_KALLSYMS
,
49 DSO_BINARY_TYPE__JAVA_JIT
,
50 DSO_BINARY_TYPE__DEBUGLINK
,
51 DSO_BINARY_TYPE__BUILD_ID_CACHE
,
52 DSO_BINARY_TYPE__FEDORA_DEBUGINFO
,
53 DSO_BINARY_TYPE__UBUNTU_DEBUGINFO
,
54 DSO_BINARY_TYPE__BUILDID_DEBUGINFO
,
55 DSO_BINARY_TYPE__SYSTEM_PATH_DSO
,
56 DSO_BINARY_TYPE__GUEST_KMODULE
,
57 DSO_BINARY_TYPE__GUEST_KMODULE_COMP
,
58 DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE
,
59 DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP
,
60 DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO
,
61 DSO_BINARY_TYPE__NOT_FOUND
,
64 #define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab)
66 bool symbol_type__is_a(char symbol_type
, enum map_type map_type
)
68 symbol_type
= toupper(symbol_type
);
72 return symbol_type
== 'T' || symbol_type
== 'W';
74 return symbol_type
== 'D';
80 static int prefix_underscores_count(const char *str
)
82 const char *tail
= str
;
90 int __weak
arch__choose_best_symbol(struct symbol
*syma
,
91 struct symbol
*symb __maybe_unused
)
93 /* Avoid "SyS" kernel syscall aliases */
94 if (strlen(syma
->name
) >= 3 && !strncmp(syma
->name
, "SyS", 3))
96 if (strlen(syma
->name
) >= 10 && !strncmp(syma
->name
, "compat_SyS", 10))
102 static int choose_best_symbol(struct symbol
*syma
, struct symbol
*symb
)
108 /* Prefer a symbol with non zero length */
109 a
= syma
->end
- syma
->start
;
110 b
= symb
->end
- symb
->start
;
111 if ((b
== 0) && (a
> 0))
113 else if ((a
== 0) && (b
> 0))
116 /* Prefer a non weak symbol over a weak one */
117 a
= syma
->binding
== STB_WEAK
;
118 b
= symb
->binding
== STB_WEAK
;
124 /* Prefer a global symbol over a non global one */
125 a
= syma
->binding
== STB_GLOBAL
;
126 b
= symb
->binding
== STB_GLOBAL
;
132 /* Prefer a symbol with less underscores */
133 a
= prefix_underscores_count(syma
->name
);
134 b
= prefix_underscores_count(symb
->name
);
140 /* Choose the symbol with the longest name */
141 na
= strlen(syma
->name
);
142 nb
= strlen(symb
->name
);
148 return arch__choose_best_symbol(syma
, symb
);
151 void symbols__fixup_duplicate(struct rb_root
*symbols
)
154 struct symbol
*curr
, *next
;
156 if (symbol_conf
.allow_aliases
)
159 nd
= rb_first(symbols
);
162 curr
= rb_entry(nd
, struct symbol
, rb_node
);
164 nd
= rb_next(&curr
->rb_node
);
165 next
= rb_entry(nd
, struct symbol
, rb_node
);
170 if (curr
->start
!= next
->start
)
173 if (choose_best_symbol(curr
, next
) == SYMBOL_A
) {
174 rb_erase(&next
->rb_node
, symbols
);
175 symbol__delete(next
);
178 nd
= rb_next(&curr
->rb_node
);
179 rb_erase(&curr
->rb_node
, symbols
);
180 symbol__delete(curr
);
185 void symbols__fixup_end(struct rb_root
*symbols
)
187 struct rb_node
*nd
, *prevnd
= rb_first(symbols
);
188 struct symbol
*curr
, *prev
;
193 curr
= rb_entry(prevnd
, struct symbol
, rb_node
);
195 for (nd
= rb_next(prevnd
); nd
; nd
= rb_next(nd
)) {
197 curr
= rb_entry(nd
, struct symbol
, rb_node
);
199 if (prev
->end
== prev
->start
&& prev
->end
!= curr
->start
)
200 prev
->end
= curr
->start
;
204 if (curr
->end
== curr
->start
)
205 curr
->end
= roundup(curr
->start
, 4096);
208 void __map_groups__fixup_end(struct map_groups
*mg
, enum map_type type
)
210 struct maps
*maps
= &mg
->maps
[type
];
211 struct map
*next
, *curr
;
213 pthread_rwlock_wrlock(&maps
->lock
);
215 curr
= maps__first(maps
);
219 for (next
= map__next(curr
); next
; next
= map__next(curr
)) {
220 curr
->end
= next
->start
;
225 * We still haven't the actual symbols, so guess the
226 * last map final address.
231 pthread_rwlock_unlock(&maps
->lock
);
234 struct symbol
*symbol__new(u64 start
, u64 len
, u8 binding
, const char *name
)
236 size_t namelen
= strlen(name
) + 1;
237 struct symbol
*sym
= calloc(1, (symbol_conf
.priv_size
+
238 sizeof(*sym
) + namelen
));
242 if (symbol_conf
.priv_size
) {
243 if (symbol_conf
.init_annotation
) {
244 struct annotation
*notes
= (void *)sym
;
245 pthread_mutex_init(¬es
->lock
, NULL
);
247 sym
= ((void *)sym
) + symbol_conf
.priv_size
;
251 sym
->end
= len
? start
+ len
: start
;
252 sym
->binding
= binding
;
253 sym
->namelen
= namelen
- 1;
255 pr_debug4("%s: %s %#" PRIx64
"-%#" PRIx64
"\n",
256 __func__
, name
, start
, sym
->end
);
257 memcpy(sym
->name
, name
, namelen
);
262 void symbol__delete(struct symbol
*sym
)
264 free(((void *)sym
) - symbol_conf
.priv_size
);
267 void symbols__delete(struct rb_root
*symbols
)
270 struct rb_node
*next
= rb_first(symbols
);
273 pos
= rb_entry(next
, struct symbol
, rb_node
);
274 next
= rb_next(&pos
->rb_node
);
275 rb_erase(&pos
->rb_node
, symbols
);
280 void __symbols__insert(struct rb_root
*symbols
, struct symbol
*sym
, bool kernel
)
282 struct rb_node
**p
= &symbols
->rb_node
;
283 struct rb_node
*parent
= NULL
;
284 const u64 ip
= sym
->start
;
288 const char *name
= sym
->name
;
290 * ppc64 uses function descriptors and appends a '.' to the
291 * start of every instruction address. Remove it.
295 sym
->idle
= symbol__is_idle(name
);
300 s
= rb_entry(parent
, struct symbol
, rb_node
);
306 rb_link_node(&sym
->rb_node
, parent
, p
);
307 rb_insert_color(&sym
->rb_node
, symbols
);
310 void symbols__insert(struct rb_root
*symbols
, struct symbol
*sym
)
312 __symbols__insert(symbols
, sym
, false);
315 static struct symbol
*symbols__find(struct rb_root
*symbols
, u64 ip
)
322 n
= symbols
->rb_node
;
325 struct symbol
*s
= rb_entry(n
, struct symbol
, rb_node
);
329 else if (ip
> s
->end
|| (ip
== s
->end
&& ip
!= s
->start
))
338 static struct symbol
*symbols__first(struct rb_root
*symbols
)
340 struct rb_node
*n
= rb_first(symbols
);
343 return rb_entry(n
, struct symbol
, rb_node
);
348 static struct symbol
*symbols__last(struct rb_root
*symbols
)
350 struct rb_node
*n
= rb_last(symbols
);
353 return rb_entry(n
, struct symbol
, rb_node
);
358 static struct symbol
*symbols__next(struct symbol
*sym
)
360 struct rb_node
*n
= rb_next(&sym
->rb_node
);
363 return rb_entry(n
, struct symbol
, rb_node
);
368 static void symbols__insert_by_name(struct rb_root
*symbols
, struct symbol
*sym
)
370 struct rb_node
**p
= &symbols
->rb_node
;
371 struct rb_node
*parent
= NULL
;
372 struct symbol_name_rb_node
*symn
, *s
;
374 symn
= container_of(sym
, struct symbol_name_rb_node
, sym
);
378 s
= rb_entry(parent
, struct symbol_name_rb_node
, rb_node
);
379 if (strcmp(sym
->name
, s
->sym
.name
) < 0)
384 rb_link_node(&symn
->rb_node
, parent
, p
);
385 rb_insert_color(&symn
->rb_node
, symbols
);
388 static void symbols__sort_by_name(struct rb_root
*symbols
,
389 struct rb_root
*source
)
393 for (nd
= rb_first(source
); nd
; nd
= rb_next(nd
)) {
394 struct symbol
*pos
= rb_entry(nd
, struct symbol
, rb_node
);
395 symbols__insert_by_name(symbols
, pos
);
399 static struct symbol
*symbols__find_by_name(struct rb_root
*symbols
,
403 struct symbol_name_rb_node
*s
= NULL
;
408 n
= symbols
->rb_node
;
413 s
= rb_entry(n
, struct symbol_name_rb_node
, rb_node
);
414 cmp
= arch__compare_symbol_names(name
, s
->sym
.name
);
427 /* return first symbol that has same name (if any) */
428 for (n
= rb_prev(n
); n
; n
= rb_prev(n
)) {
429 struct symbol_name_rb_node
*tmp
;
431 tmp
= rb_entry(n
, struct symbol_name_rb_node
, rb_node
);
432 if (arch__compare_symbol_names(tmp
->sym
.name
, s
->sym
.name
))
441 void dso__reset_find_symbol_cache(struct dso
*dso
)
445 for (type
= MAP__FUNCTION
; type
<= MAP__VARIABLE
; ++type
) {
446 dso
->last_find_result
[type
].addr
= 0;
447 dso
->last_find_result
[type
].symbol
= NULL
;
451 void dso__insert_symbol(struct dso
*dso
, enum map_type type
, struct symbol
*sym
)
453 __symbols__insert(&dso
->symbols
[type
], sym
, dso
->kernel
);
455 /* update the symbol cache if necessary */
456 if (dso
->last_find_result
[type
].addr
>= sym
->start
&&
457 (dso
->last_find_result
[type
].addr
< sym
->end
||
458 sym
->start
== sym
->end
)) {
459 dso
->last_find_result
[type
].symbol
= sym
;
463 struct symbol
*dso__find_symbol(struct dso
*dso
,
464 enum map_type type
, u64 addr
)
466 if (dso
->last_find_result
[type
].addr
!= addr
) {
467 dso
->last_find_result
[type
].addr
= addr
;
468 dso
->last_find_result
[type
].symbol
= symbols__find(&dso
->symbols
[type
], addr
);
471 return dso
->last_find_result
[type
].symbol
;
474 struct symbol
*dso__first_symbol(struct dso
*dso
, enum map_type type
)
476 return symbols__first(&dso
->symbols
[type
]);
479 struct symbol
*dso__last_symbol(struct dso
*dso
, enum map_type type
)
481 return symbols__last(&dso
->symbols
[type
]);
484 struct symbol
*dso__next_symbol(struct symbol
*sym
)
486 return symbols__next(sym
);
489 struct symbol
*symbol__next_by_name(struct symbol
*sym
)
491 struct symbol_name_rb_node
*s
= container_of(sym
, struct symbol_name_rb_node
, sym
);
492 struct rb_node
*n
= rb_next(&s
->rb_node
);
494 return n
? &rb_entry(n
, struct symbol_name_rb_node
, rb_node
)->sym
: NULL
;
498 * Teturns first symbol that matched with @name.
500 struct symbol
*dso__find_symbol_by_name(struct dso
*dso
, enum map_type type
,
503 return symbols__find_by_name(&dso
->symbol_names
[type
], name
);
506 void dso__sort_by_name(struct dso
*dso
, enum map_type type
)
508 dso__set_sorted_by_name(dso
, type
);
509 return symbols__sort_by_name(&dso
->symbol_names
[type
],
510 &dso
->symbols
[type
]);
513 int modules__parse(const char *filename
, void *arg
,
514 int (*process_module
)(void *arg
, const char *name
,
522 file
= fopen(filename
, "r");
532 line_len
= getline(&line
, &n
, file
);
545 line
[--line_len
] = '\0'; /* \n */
547 sep
= strrchr(line
, 'x');
551 hex2u64(sep
+ 1, &start
);
553 sep
= strchr(line
, ' ');
559 scnprintf(name
, sizeof(name
), "[%s]", line
);
561 err
= process_module(arg
, name
, start
);
571 struct process_kallsyms_args
{
577 * These are symbols in the kernel image, so make sure that
578 * sym is from a kernel DSO.
580 static bool symbol__is_idle(const char *name
)
582 const char * const idle_symbols
[] = {
591 "mwait_idle_with_hints",
593 "ppc64_runlatch_off",
594 "pseries_dedicated_idle_sleep",
599 for (i
= 0; idle_symbols
[i
]; i
++) {
600 if (!strcmp(idle_symbols
[i
], name
))
607 static int map__process_kallsym_symbol(void *arg
, const char *name
,
608 char type
, u64 start
)
611 struct process_kallsyms_args
*a
= arg
;
612 struct rb_root
*root
= &a
->dso
->symbols
[a
->map
->type
];
614 if (!symbol_type__is_a(type
, a
->map
->type
))
618 * module symbols are not sorted so we add all
619 * symbols, setting length to 0, and rely on
620 * symbols__fixup_end() to fix it up.
622 sym
= symbol__new(start
, 0, kallsyms2elf_binding(type
), name
);
626 * We will pass the symbols to the filter later, in
627 * map__split_kallsyms, when we have split the maps per module
629 __symbols__insert(root
, sym
, !strchr(name
, '['));
635 * Loads the function entries in /proc/kallsyms into kernel_map->dso,
636 * so that we can in the next step set the symbol ->end address and then
637 * call kernel_maps__split_kallsyms.
639 static int dso__load_all_kallsyms(struct dso
*dso
, const char *filename
,
642 struct process_kallsyms_args args
= { .map
= map
, .dso
= dso
, };
643 return kallsyms__parse(filename
, &args
, map__process_kallsym_symbol
);
646 static int dso__split_kallsyms_for_kcore(struct dso
*dso
, struct map
*map
)
648 struct map_groups
*kmaps
= map__kmaps(map
);
649 struct map
*curr_map
;
652 struct rb_root old_root
= dso
->symbols
[map
->type
];
653 struct rb_root
*root
= &dso
->symbols
[map
->type
];
654 struct rb_node
*next
= rb_first(root
);
664 pos
= rb_entry(next
, struct symbol
, rb_node
);
665 next
= rb_next(&pos
->rb_node
);
667 rb_erase_init(&pos
->rb_node
, &old_root
);
669 module
= strchr(pos
->name
, '\t');
673 curr_map
= map_groups__find(kmaps
, map
->type
, pos
->start
);
680 pos
->start
-= curr_map
->start
- curr_map
->pgoff
;
682 pos
->end
-= curr_map
->start
- curr_map
->pgoff
;
683 symbols__insert(&curr_map
->dso
->symbols
[curr_map
->type
], pos
);
687 /* Symbols have been adjusted */
688 dso
->adjust_symbols
= 1;
694 * Split the symbols into maps, making sure there are no overlaps, i.e. the
695 * kernel range is broken in several maps, named [kernel].N, as we don't have
696 * the original ELF section names vmlinux have.
698 static int dso__split_kallsyms(struct dso
*dso
, struct map
*map
, u64 delta
)
700 struct map_groups
*kmaps
= map__kmaps(map
);
701 struct machine
*machine
;
702 struct map
*curr_map
= map
;
704 int count
= 0, moved
= 0;
705 struct rb_root
*root
= &dso
->symbols
[map
->type
];
706 struct rb_node
*next
= rb_first(root
);
707 int kernel_range
= 0;
712 machine
= kmaps
->machine
;
717 pos
= rb_entry(next
, struct symbol
, rb_node
);
718 next
= rb_next(&pos
->rb_node
);
720 module
= strchr(pos
->name
, '\t');
722 if (!symbol_conf
.use_modules
)
727 if (strcmp(curr_map
->dso
->short_name
, module
)) {
728 if (curr_map
!= map
&&
729 dso
->kernel
== DSO_TYPE_GUEST_KERNEL
&&
730 machine__is_default_guest(machine
)) {
732 * We assume all symbols of a module are
733 * continuous in * kallsyms, so curr_map
734 * points to a module and all its
735 * symbols are in its kmap. Mark it as
738 dso__set_loaded(curr_map
->dso
,
742 curr_map
= map_groups__find_by_name(kmaps
,
744 if (curr_map
== NULL
) {
745 pr_debug("%s/proc/{kallsyms,modules} "
746 "inconsistency while looking "
747 "for \"%s\" module!\n",
748 machine
->root_dir
, module
);
753 if (curr_map
->dso
->loaded
&&
754 !machine__is_default_guest(machine
))
758 * So that we look just like we get from .ko files,
759 * i.e. not prelinked, relative to map->start.
761 pos
->start
= curr_map
->map_ip(curr_map
, pos
->start
);
762 pos
->end
= curr_map
->map_ip(curr_map
, pos
->end
);
763 } else if (curr_map
!= map
) {
764 char dso_name
[PATH_MAX
];
768 /* Kernel was relocated at boot time */
778 if (dso
->kernel
== DSO_TYPE_GUEST_KERNEL
)
779 snprintf(dso_name
, sizeof(dso_name
),
783 snprintf(dso_name
, sizeof(dso_name
),
787 ndso
= dso__new(dso_name
);
791 ndso
->kernel
= dso
->kernel
;
793 curr_map
= map__new2(pos
->start
, ndso
, map
->type
);
794 if (curr_map
== NULL
) {
799 curr_map
->map_ip
= curr_map
->unmap_ip
= identity__map_ip
;
800 map_groups__insert(kmaps
, curr_map
);
803 /* Kernel was relocated at boot time */
808 if (curr_map
!= map
) {
809 rb_erase(&pos
->rb_node
, root
);
810 symbols__insert(&curr_map
->dso
->symbols
[curr_map
->type
], pos
);
817 rb_erase(&pos
->rb_node
, root
);
821 if (curr_map
!= map
&&
822 dso
->kernel
== DSO_TYPE_GUEST_KERNEL
&&
823 machine__is_default_guest(kmaps
->machine
)) {
824 dso__set_loaded(curr_map
->dso
, curr_map
->type
);
827 return count
+ moved
;
830 bool symbol__restricted_filename(const char *filename
,
831 const char *restricted_filename
)
833 bool restricted
= false;
835 if (symbol_conf
.kptr_restrict
) {
836 char *r
= realpath(filename
, NULL
);
839 restricted
= strcmp(r
, restricted_filename
) == 0;
849 struct rb_node rb_node
;
854 static void add_module(struct module_info
*mi
, struct rb_root
*modules
)
856 struct rb_node
**p
= &modules
->rb_node
;
857 struct rb_node
*parent
= NULL
;
858 struct module_info
*m
;
862 m
= rb_entry(parent
, struct module_info
, rb_node
);
863 if (strcmp(mi
->name
, m
->name
) < 0)
868 rb_link_node(&mi
->rb_node
, parent
, p
);
869 rb_insert_color(&mi
->rb_node
, modules
);
872 static void delete_modules(struct rb_root
*modules
)
874 struct module_info
*mi
;
875 struct rb_node
*next
= rb_first(modules
);
878 mi
= rb_entry(next
, struct module_info
, rb_node
);
879 next
= rb_next(&mi
->rb_node
);
880 rb_erase(&mi
->rb_node
, modules
);
886 static struct module_info
*find_module(const char *name
,
887 struct rb_root
*modules
)
889 struct rb_node
*n
= modules
->rb_node
;
892 struct module_info
*m
;
895 m
= rb_entry(n
, struct module_info
, rb_node
);
896 cmp
= strcmp(name
, m
->name
);
908 static int __read_proc_modules(void *arg
, const char *name
, u64 start
)
910 struct rb_root
*modules
= arg
;
911 struct module_info
*mi
;
913 mi
= zalloc(sizeof(struct module_info
));
917 mi
->name
= strdup(name
);
925 add_module(mi
, modules
);
930 static int read_proc_modules(const char *filename
, struct rb_root
*modules
)
932 if (symbol__restricted_filename(filename
, "/proc/modules"))
935 if (modules__parse(filename
, modules
, __read_proc_modules
)) {
936 delete_modules(modules
);
943 int compare_proc_modules(const char *from
, const char *to
)
945 struct rb_root from_modules
= RB_ROOT
;
946 struct rb_root to_modules
= RB_ROOT
;
947 struct rb_node
*from_node
, *to_node
;
948 struct module_info
*from_m
, *to_m
;
951 if (read_proc_modules(from
, &from_modules
))
954 if (read_proc_modules(to
, &to_modules
))
955 goto out_delete_from
;
957 from_node
= rb_first(&from_modules
);
958 to_node
= rb_first(&to_modules
);
963 from_m
= rb_entry(from_node
, struct module_info
, rb_node
);
964 to_m
= rb_entry(to_node
, struct module_info
, rb_node
);
966 if (from_m
->start
!= to_m
->start
||
967 strcmp(from_m
->name
, to_m
->name
))
970 from_node
= rb_next(from_node
);
971 to_node
= rb_next(to_node
);
974 if (!from_node
&& !to_node
)
977 delete_modules(&to_modules
);
979 delete_modules(&from_modules
);
984 static int do_validate_kcore_modules(const char *filename
, struct map
*map
,
985 struct map_groups
*kmaps
)
987 struct rb_root modules
= RB_ROOT
;
991 err
= read_proc_modules(filename
, &modules
);
995 old_map
= map_groups__first(kmaps
, map
->type
);
997 struct map
*next
= map_groups__next(old_map
);
998 struct module_info
*mi
;
1000 if (old_map
== map
|| old_map
->start
== map
->start
) {
1001 /* The kernel map */
1006 /* Module must be in memory at the same address */
1007 mi
= find_module(old_map
->dso
->short_name
, &modules
);
1008 if (!mi
|| mi
->start
!= old_map
->start
) {
1016 delete_modules(&modules
);
1021 * If kallsyms is referenced by name then we look for filename in the same
1024 static bool filename_from_kallsyms_filename(char *filename
,
1025 const char *base_name
,
1026 const char *kallsyms_filename
)
1030 strcpy(filename
, kallsyms_filename
);
1031 name
= strrchr(filename
, '/');
1037 if (!strcmp(name
, "kallsyms")) {
1038 strcpy(name
, base_name
);
1045 static int validate_kcore_modules(const char *kallsyms_filename
,
1048 struct map_groups
*kmaps
= map__kmaps(map
);
1049 char modules_filename
[PATH_MAX
];
1054 if (!filename_from_kallsyms_filename(modules_filename
, "modules",
1058 if (do_validate_kcore_modules(modules_filename
, map
, kmaps
))
1064 static int validate_kcore_addresses(const char *kallsyms_filename
,
1067 struct kmap
*kmap
= map__kmap(map
);
1072 if (kmap
->ref_reloc_sym
&& kmap
->ref_reloc_sym
->name
) {
1075 start
= kallsyms__get_function_start(kallsyms_filename
,
1076 kmap
->ref_reloc_sym
->name
);
1077 if (start
!= kmap
->ref_reloc_sym
->addr
)
1081 return validate_kcore_modules(kallsyms_filename
, map
);
1084 struct kcore_mapfn_data
{
1087 struct list_head maps
;
1090 static int kcore_mapfn(u64 start
, u64 len
, u64 pgoff
, void *data
)
1092 struct kcore_mapfn_data
*md
= data
;
1095 map
= map__new2(start
, md
->dso
, md
->type
);
1099 map
->end
= map
->start
+ len
;
1102 list_add(&map
->node
, &md
->maps
);
1107 static int dso__load_kcore(struct dso
*dso
, struct map
*map
,
1108 const char *kallsyms_filename
)
1110 struct map_groups
*kmaps
= map__kmaps(map
);
1111 struct machine
*machine
;
1112 struct kcore_mapfn_data md
;
1113 struct map
*old_map
, *new_map
, *replacement_map
= NULL
;
1116 char kcore_filename
[PATH_MAX
];
1122 machine
= kmaps
->machine
;
1124 /* This function requires that the map is the kernel map */
1125 if (map
!= machine
->vmlinux_maps
[map
->type
])
1128 if (!filename_from_kallsyms_filename(kcore_filename
, "kcore",
1132 /* Modules and kernel must be present at their original addresses */
1133 if (validate_kcore_addresses(kallsyms_filename
, map
))
1137 md
.type
= map
->type
;
1138 INIT_LIST_HEAD(&md
.maps
);
1140 fd
= open(kcore_filename
, O_RDONLY
);
1142 pr_debug("Failed to open %s. Note /proc/kcore requires CAP_SYS_RAWIO capability to access.\n",
1147 /* Read new maps into temporary lists */
1148 err
= file__read_maps(fd
, md
.type
== MAP__FUNCTION
, kcore_mapfn
, &md
,
1152 dso
->is_64_bit
= is_64_bit
;
1154 if (list_empty(&md
.maps
)) {
1159 /* Remove old maps */
1160 old_map
= map_groups__first(kmaps
, map
->type
);
1162 struct map
*next
= map_groups__next(old_map
);
1165 map_groups__remove(kmaps
, old_map
);
1169 /* Find the kernel map using the first symbol */
1170 sym
= dso__first_symbol(dso
, map
->type
);
1171 list_for_each_entry(new_map
, &md
.maps
, node
) {
1172 if (sym
&& sym
->start
>= new_map
->start
&&
1173 sym
->start
< new_map
->end
) {
1174 replacement_map
= new_map
;
1179 if (!replacement_map
)
1180 replacement_map
= list_entry(md
.maps
.next
, struct map
, node
);
1183 while (!list_empty(&md
.maps
)) {
1184 new_map
= list_entry(md
.maps
.next
, struct map
, node
);
1185 list_del_init(&new_map
->node
);
1186 if (new_map
== replacement_map
) {
1187 map
->start
= new_map
->start
;
1188 map
->end
= new_map
->end
;
1189 map
->pgoff
= new_map
->pgoff
;
1190 map
->map_ip
= new_map
->map_ip
;
1191 map
->unmap_ip
= new_map
->unmap_ip
;
1192 /* Ensure maps are correctly ordered */
1194 map_groups__remove(kmaps
, map
);
1195 map_groups__insert(kmaps
, map
);
1198 map_groups__insert(kmaps
, new_map
);
1205 * Set the data type and long name so that kcore can be read via
1206 * dso__data_read_addr().
1208 if (dso
->kernel
== DSO_TYPE_GUEST_KERNEL
)
1209 dso
->binary_type
= DSO_BINARY_TYPE__GUEST_KCORE
;
1211 dso
->binary_type
= DSO_BINARY_TYPE__KCORE
;
1212 dso__set_long_name(dso
, strdup(kcore_filename
), true);
1216 if (map
->type
== MAP__FUNCTION
)
1217 pr_debug("Using %s for kernel object code\n", kcore_filename
);
1219 pr_debug("Using %s for kernel data\n", kcore_filename
);
1224 while (!list_empty(&md
.maps
)) {
1225 map
= list_entry(md
.maps
.next
, struct map
, node
);
1226 list_del_init(&map
->node
);
1234 * If the kernel is relocated at boot time, kallsyms won't match. Compute the
1235 * delta based on the relocation reference symbol.
1237 static int kallsyms__delta(struct map
*map
, const char *filename
, u64
*delta
)
1239 struct kmap
*kmap
= map__kmap(map
);
1245 if (!kmap
->ref_reloc_sym
|| !kmap
->ref_reloc_sym
->name
)
1248 addr
= kallsyms__get_function_start(filename
,
1249 kmap
->ref_reloc_sym
->name
);
1253 *delta
= addr
- kmap
->ref_reloc_sym
->addr
;
1257 int __dso__load_kallsyms(struct dso
*dso
, const char *filename
,
1258 struct map
*map
, bool no_kcore
)
1262 if (symbol__restricted_filename(filename
, "/proc/kallsyms"))
1265 if (dso__load_all_kallsyms(dso
, filename
, map
) < 0)
1268 if (kallsyms__delta(map
, filename
, &delta
))
1271 symbols__fixup_end(&dso
->symbols
[map
->type
]);
1272 symbols__fixup_duplicate(&dso
->symbols
[map
->type
]);
1274 if (dso
->kernel
== DSO_TYPE_GUEST_KERNEL
)
1275 dso
->symtab_type
= DSO_BINARY_TYPE__GUEST_KALLSYMS
;
1277 dso
->symtab_type
= DSO_BINARY_TYPE__KALLSYMS
;
1279 if (!no_kcore
&& !dso__load_kcore(dso
, map
, filename
))
1280 return dso__split_kallsyms_for_kcore(dso
, map
);
1282 return dso__split_kallsyms(dso
, map
, delta
);
1285 int dso__load_kallsyms(struct dso
*dso
, const char *filename
,
1288 return __dso__load_kallsyms(dso
, filename
, map
, false);
1291 static int dso__load_perf_map(struct dso
*dso
, struct map
*map
)
1298 file
= fopen(dso
->long_name
, "r");
1302 while (!feof(file
)) {
1307 line_len
= getline(&line
, &n
, file
);
1314 line
[--line_len
] = '\0'; /* \n */
1316 len
= hex2u64(line
, &start
);
1319 if (len
+ 2 >= line_len
)
1322 len
+= hex2u64(line
+ len
, &size
);
1325 if (len
+ 2 >= line_len
)
1328 sym
= symbol__new(start
, size
, STB_GLOBAL
, line
+ len
);
1331 goto out_delete_line
;
1333 symbols__insert(&dso
->symbols
[map
->type
], sym
);
1348 static bool dso__is_compatible_symtab_type(struct dso
*dso
, bool kmod
,
1349 enum dso_binary_type type
)
1352 case DSO_BINARY_TYPE__JAVA_JIT
:
1353 case DSO_BINARY_TYPE__DEBUGLINK
:
1354 case DSO_BINARY_TYPE__SYSTEM_PATH_DSO
:
1355 case DSO_BINARY_TYPE__FEDORA_DEBUGINFO
:
1356 case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO
:
1357 case DSO_BINARY_TYPE__BUILDID_DEBUGINFO
:
1358 case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO
:
1359 return !kmod
&& dso
->kernel
== DSO_TYPE_USER
;
1361 case DSO_BINARY_TYPE__KALLSYMS
:
1362 case DSO_BINARY_TYPE__VMLINUX
:
1363 case DSO_BINARY_TYPE__KCORE
:
1364 return dso
->kernel
== DSO_TYPE_KERNEL
;
1366 case DSO_BINARY_TYPE__GUEST_KALLSYMS
:
1367 case DSO_BINARY_TYPE__GUEST_VMLINUX
:
1368 case DSO_BINARY_TYPE__GUEST_KCORE
:
1369 return dso
->kernel
== DSO_TYPE_GUEST_KERNEL
;
1371 case DSO_BINARY_TYPE__GUEST_KMODULE
:
1372 case DSO_BINARY_TYPE__GUEST_KMODULE_COMP
:
1373 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE
:
1374 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP
:
1376 * kernel modules know their symtab type - it's set when
1377 * creating a module dso in machine__findnew_module_map().
1379 return kmod
&& dso
->symtab_type
== type
;
1381 case DSO_BINARY_TYPE__BUILD_ID_CACHE
:
1384 case DSO_BINARY_TYPE__NOT_FOUND
:
1390 int dso__load(struct dso
*dso
, struct map
*map
)
1395 struct machine
*machine
;
1396 char *root_dir
= (char *) "";
1398 struct symsrc ss_
[2];
1399 struct symsrc
*syms_ss
= NULL
, *runtime_ss
= NULL
;
1401 unsigned char build_id
[BUILD_ID_SIZE
];
1403 pthread_mutex_lock(&dso
->lock
);
1405 /* check again under the dso->lock */
1406 if (dso__loaded(dso
, map
->type
)) {
1412 if (dso
->kernel
== DSO_TYPE_KERNEL
)
1413 ret
= dso__load_kernel_sym(dso
, map
);
1414 else if (dso
->kernel
== DSO_TYPE_GUEST_KERNEL
)
1415 ret
= dso__load_guest_kernel_sym(dso
, map
);
1420 if (map
->groups
&& map
->groups
->machine
)
1421 machine
= map
->groups
->machine
;
1425 dso
->adjust_symbols
= 0;
1427 if (strncmp(dso
->name
, "/tmp/perf-", 10) == 0) {
1430 if (lstat(dso
->name
, &st
) < 0)
1433 if (!symbol_conf
.force
&& st
.st_uid
&& (st
.st_uid
!= geteuid())) {
1434 pr_warning("File %s not owned by current user or root, "
1435 "ignoring it (use -f to override).\n", dso
->name
);
1439 ret
= dso__load_perf_map(dso
, map
);
1440 dso
->symtab_type
= ret
> 0 ? DSO_BINARY_TYPE__JAVA_JIT
:
1441 DSO_BINARY_TYPE__NOT_FOUND
;
1446 root_dir
= machine
->root_dir
;
1448 name
= malloc(PATH_MAX
);
1452 kmod
= dso
->symtab_type
== DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE
||
1453 dso
->symtab_type
== DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP
||
1454 dso
->symtab_type
== DSO_BINARY_TYPE__GUEST_KMODULE
||
1455 dso
->symtab_type
== DSO_BINARY_TYPE__GUEST_KMODULE_COMP
;
1459 * Read the build id if possible. This is required for
1460 * DSO_BINARY_TYPE__BUILDID_DEBUGINFO to work
1462 if (!dso
->has_build_id
&&
1463 is_regular_file(dso
->long_name
) &&
1464 filename__read_build_id(dso
->long_name
, build_id
, BUILD_ID_SIZE
) > 0)
1465 dso__set_build_id(dso
, build_id
);
1468 * Iterate over candidate debug images.
1469 * Keep track of "interesting" ones (those which have a symtab, dynsym,
1470 * and/or opd section) for processing.
1472 for (i
= 0; i
< DSO_BINARY_TYPE__SYMTAB_CNT
; i
++) {
1473 struct symsrc
*ss
= &ss_
[ss_pos
];
1474 bool next_slot
= false;
1476 enum dso_binary_type symtab_type
= binary_type_symtab
[i
];
1478 if (!dso__is_compatible_symtab_type(dso
, kmod
, symtab_type
))
1481 if (dso__read_binary_type_filename(dso
, symtab_type
,
1482 root_dir
, name
, PATH_MAX
))
1485 if (!is_regular_file(name
))
1488 /* Name is now the name of the next image to try */
1489 if (symsrc__init(ss
, dso
, name
, symtab_type
) < 0)
1492 if (!syms_ss
&& symsrc__has_symtab(ss
)) {
1495 if (!dso
->symsrc_filename
)
1496 dso
->symsrc_filename
= strdup(name
);
1499 if (!runtime_ss
&& symsrc__possibly_runtime(ss
)) {
1507 if (syms_ss
&& runtime_ss
)
1510 symsrc__destroy(ss
);
1515 if (!runtime_ss
&& !syms_ss
)
1518 if (runtime_ss
&& !syms_ss
) {
1519 syms_ss
= runtime_ss
;
1522 /* We'll have to hope for the best */
1523 if (!runtime_ss
&& syms_ss
)
1524 runtime_ss
= syms_ss
;
1526 if (syms_ss
&& syms_ss
->type
== DSO_BINARY_TYPE__BUILD_ID_CACHE
)
1527 if (dso__build_id_is_kmod(dso
, name
, PATH_MAX
))
1531 ret
= dso__load_sym(dso
, map
, syms_ss
, runtime_ss
, kmod
);
1538 nr_plt
= dso__synthesize_plt_symbols(dso
, runtime_ss
, map
);
1543 for (; ss_pos
> 0; ss_pos
--)
1544 symsrc__destroy(&ss_
[ss_pos
- 1]);
1547 if (ret
< 0 && strstr(dso
->name
, " (deleted)") != NULL
)
1550 dso__set_loaded(dso
, map
->type
);
1551 pthread_mutex_unlock(&dso
->lock
);
1556 struct map
*map_groups__find_by_name(struct map_groups
*mg
,
1557 enum map_type type
, const char *name
)
1559 struct maps
*maps
= &mg
->maps
[type
];
1562 pthread_rwlock_rdlock(&maps
->lock
);
1564 for (map
= maps__first(maps
); map
; map
= map__next(map
)) {
1565 if (map
->dso
&& strcmp(map
->dso
->short_name
, name
) == 0)
1572 pthread_rwlock_unlock(&maps
->lock
);
1576 int dso__load_vmlinux(struct dso
*dso
, struct map
*map
,
1577 const char *vmlinux
, bool vmlinux_allocated
)
1581 char symfs_vmlinux
[PATH_MAX
];
1582 enum dso_binary_type symtab_type
;
1584 if (vmlinux
[0] == '/')
1585 snprintf(symfs_vmlinux
, sizeof(symfs_vmlinux
), "%s", vmlinux
);
1587 symbol__join_symfs(symfs_vmlinux
, vmlinux
);
1589 if (dso
->kernel
== DSO_TYPE_GUEST_KERNEL
)
1590 symtab_type
= DSO_BINARY_TYPE__GUEST_VMLINUX
;
1592 symtab_type
= DSO_BINARY_TYPE__VMLINUX
;
1594 if (symsrc__init(&ss
, dso
, symfs_vmlinux
, symtab_type
))
1597 err
= dso__load_sym(dso
, map
, &ss
, &ss
, 0);
1598 symsrc__destroy(&ss
);
1601 if (dso
->kernel
== DSO_TYPE_GUEST_KERNEL
)
1602 dso
->binary_type
= DSO_BINARY_TYPE__GUEST_VMLINUX
;
1604 dso
->binary_type
= DSO_BINARY_TYPE__VMLINUX
;
1605 dso__set_long_name(dso
, vmlinux
, vmlinux_allocated
);
1606 dso__set_loaded(dso
, map
->type
);
1607 pr_debug("Using %s for symbols\n", symfs_vmlinux
);
1613 int dso__load_vmlinux_path(struct dso
*dso
, struct map
*map
)
1616 char *filename
= NULL
;
1618 pr_debug("Looking at the vmlinux_path (%d entries long)\n",
1619 vmlinux_path__nr_entries
+ 1);
1621 for (i
= 0; i
< vmlinux_path__nr_entries
; ++i
) {
1622 err
= dso__load_vmlinux(dso
, map
, vmlinux_path
[i
], false);
1627 if (!symbol_conf
.ignore_vmlinux_buildid
)
1628 filename
= dso__build_id_filename(dso
, NULL
, 0);
1629 if (filename
!= NULL
) {
1630 err
= dso__load_vmlinux(dso
, map
, filename
, true);
1639 static bool visible_dir_filter(const char *name
, struct dirent
*d
)
1641 if (d
->d_type
!= DT_DIR
)
1643 return lsdir_no_dot_filter(name
, d
);
1646 static int find_matching_kcore(struct map
*map
, char *dir
, size_t dir_sz
)
1648 char kallsyms_filename
[PATH_MAX
];
1650 struct strlist
*dirs
;
1651 struct str_node
*nd
;
1653 dirs
= lsdir(dir
, visible_dir_filter
);
1657 strlist__for_each_entry(nd
, dirs
) {
1658 scnprintf(kallsyms_filename
, sizeof(kallsyms_filename
),
1659 "%s/%s/kallsyms", dir
, nd
->s
);
1660 if (!validate_kcore_addresses(kallsyms_filename
, map
)) {
1661 strlcpy(dir
, kallsyms_filename
, dir_sz
);
1667 strlist__delete(dirs
);
1673 * Use open(O_RDONLY) to check readability directly instead of access(R_OK)
1674 * since access(R_OK) only checks with real UID/GID but open() use effective
1675 * UID/GID and actual capabilities (e.g. /proc/kcore requires CAP_SYS_RAWIO).
1677 static bool filename__readable(const char *file
)
1679 int fd
= open(file
, O_RDONLY
);
1686 static char *dso__find_kallsyms(struct dso
*dso
, struct map
*map
)
1688 u8 host_build_id
[BUILD_ID_SIZE
];
1689 char sbuild_id
[SBUILD_ID_SIZE
];
1690 bool is_host
= false;
1691 char path
[PATH_MAX
];
1693 if (!dso
->has_build_id
) {
1695 * Last resort, if we don't have a build-id and couldn't find
1696 * any vmlinux file, try the running kernel kallsyms table.
1701 if (sysfs__read_build_id("/sys/kernel/notes", host_build_id
,
1702 sizeof(host_build_id
)) == 0)
1703 is_host
= dso__build_id_equal(dso
, host_build_id
);
1705 /* Try a fast path for /proc/kallsyms if possible */
1708 * Do not check the build-id cache, unless we know we cannot use
1709 * /proc/kcore or module maps don't match to /proc/kallsyms.
1710 * To check readability of /proc/kcore, do not use access(R_OK)
1711 * since /proc/kcore requires CAP_SYS_RAWIO to read and access
1714 if (filename__readable("/proc/kcore") &&
1715 !validate_kcore_addresses("/proc/kallsyms", map
))
1719 build_id__sprintf(dso
->build_id
, sizeof(dso
->build_id
), sbuild_id
);
1721 /* Find kallsyms in build-id cache with kcore */
1722 scnprintf(path
, sizeof(path
), "%s/%s/%s",
1723 buildid_dir
, DSO__NAME_KCORE
, sbuild_id
);
1725 if (!find_matching_kcore(map
, path
, sizeof(path
)))
1726 return strdup(path
);
1728 /* Use current /proc/kallsyms if possible */
1731 return strdup("/proc/kallsyms");
1734 /* Finally, find a cache of kallsyms */
1735 if (!build_id_cache__kallsyms_path(sbuild_id
, path
, sizeof(path
))) {
1736 pr_err("No kallsyms or vmlinux with build-id %s was found\n",
1741 return strdup(path
);
1744 static int dso__load_kernel_sym(struct dso
*dso
, struct map
*map
)
1747 const char *kallsyms_filename
= NULL
;
1748 char *kallsyms_allocated_filename
= NULL
;
1750 * Step 1: if the user specified a kallsyms or vmlinux filename, use
1751 * it and only it, reporting errors to the user if it cannot be used.
1753 * For instance, try to analyse an ARM perf.data file _without_ a
1754 * build-id, or if the user specifies the wrong path to the right
1755 * vmlinux file, obviously we can't fallback to another vmlinux (a
1756 * x86_86 one, on the machine where analysis is being performed, say),
1757 * or worse, /proc/kallsyms.
1759 * If the specified file _has_ a build-id and there is a build-id
1760 * section in the perf.data file, we will still do the expected
1761 * validation in dso__load_vmlinux and will bail out if they don't
1764 if (symbol_conf
.kallsyms_name
!= NULL
) {
1765 kallsyms_filename
= symbol_conf
.kallsyms_name
;
1769 if (!symbol_conf
.ignore_vmlinux
&& symbol_conf
.vmlinux_name
!= NULL
) {
1770 return dso__load_vmlinux(dso
, map
, symbol_conf
.vmlinux_name
, false);
1773 if (!symbol_conf
.ignore_vmlinux
&& vmlinux_path
!= NULL
) {
1774 err
= dso__load_vmlinux_path(dso
, map
);
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
);
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
, DSO__NAME_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
)
1808 const char *kallsyms_filename
= NULL
;
1809 struct machine
*machine
;
1810 char path
[PATH_MAX
];
1813 pr_debug("Guest kernel map hasn't the point to groups\n");
1816 machine
= map
->groups
->machine
;
1818 if (machine__is_default_guest(machine
)) {
1820 * if the user specified a vmlinux filename, use it and only
1821 * it, reporting errors to the user if it cannot be used.
1822 * Or use file guest_kallsyms inputted by user on commandline
1824 if (symbol_conf
.default_guest_vmlinux_name
!= NULL
) {
1825 err
= dso__load_vmlinux(dso
, map
,
1826 symbol_conf
.default_guest_vmlinux_name
,
1831 kallsyms_filename
= symbol_conf
.default_guest_kallsyms
;
1832 if (!kallsyms_filename
)
1835 sprintf(path
, "%s/proc/kallsyms", machine
->root_dir
);
1836 kallsyms_filename
= path
;
1839 err
= dso__load_kallsyms(dso
, kallsyms_filename
, map
);
1841 pr_debug("Using %s for symbols\n", kallsyms_filename
);
1842 if (err
> 0 && !dso__is_kcore(dso
)) {
1843 dso
->binary_type
= DSO_BINARY_TYPE__GUEST_KALLSYMS
;
1844 machine__mmap_name(machine
, path
, sizeof(path
));
1845 dso__set_long_name(dso
, strdup(path
), true);
1846 map__fixup_start(map
);
1847 map__fixup_end(map
);
1853 static void vmlinux_path__exit(void)
1855 while (--vmlinux_path__nr_entries
>= 0)
1856 zfree(&vmlinux_path
[vmlinux_path__nr_entries
]);
1857 vmlinux_path__nr_entries
= 0;
1859 zfree(&vmlinux_path
);
1862 static const char * const vmlinux_paths
[] = {
1867 static const char * const vmlinux_paths_upd
[] = {
1869 "/usr/lib/debug/boot/vmlinux-%s",
1870 "/lib/modules/%s/build/vmlinux",
1871 "/usr/lib/debug/lib/modules/%s/vmlinux",
1872 "/usr/lib/debug/boot/vmlinux-%s.debug"
1875 static int vmlinux_path__add(const char *new_entry
)
1877 vmlinux_path
[vmlinux_path__nr_entries
] = strdup(new_entry
);
1878 if (vmlinux_path
[vmlinux_path__nr_entries
] == NULL
)
1880 ++vmlinux_path__nr_entries
;
1885 static int vmlinux_path__init(struct perf_env
*env
)
1889 char *kernel_version
;
1892 vmlinux_path
= malloc(sizeof(char *) * (ARRAY_SIZE(vmlinux_paths
) +
1893 ARRAY_SIZE(vmlinux_paths_upd
)));
1894 if (vmlinux_path
== NULL
)
1897 for (i
= 0; i
< ARRAY_SIZE(vmlinux_paths
); i
++)
1898 if (vmlinux_path__add(vmlinux_paths
[i
]) < 0)
1901 /* only try kernel version if no symfs was given */
1902 if (symbol_conf
.symfs
[0] != 0)
1906 kernel_version
= env
->os_release
;
1908 if (uname(&uts
) < 0)
1911 kernel_version
= uts
.release
;
1914 for (i
= 0; i
< ARRAY_SIZE(vmlinux_paths_upd
); i
++) {
1915 snprintf(bf
, sizeof(bf
), vmlinux_paths_upd
[i
], kernel_version
);
1916 if (vmlinux_path__add(bf
) < 0)
1923 vmlinux_path__exit();
1927 int setup_list(struct strlist
**list
, const char *list_str
,
1928 const char *list_name
)
1930 if (list_str
== NULL
)
1933 *list
= strlist__new(list_str
, NULL
);
1935 pr_err("problems parsing %s list\n", list_name
);
1939 symbol_conf
.has_filter
= true;
1943 int setup_intlist(struct intlist
**list
, const char *list_str
,
1944 const char *list_name
)
1946 if (list_str
== NULL
)
1949 *list
= intlist__new(list_str
);
1951 pr_err("problems parsing %s list\n", list_name
);
1957 static bool symbol__read_kptr_restrict(void)
1960 FILE *fp
= fopen("/proc/sys/kernel/kptr_restrict", "r");
1965 if (fgets(line
, sizeof(line
), fp
) != NULL
)
1966 value
= ((geteuid() != 0) || (getuid() != 0)) ?
1976 int symbol__annotation_init(void)
1978 if (symbol_conf
.initialized
) {
1979 pr_err("Annotation needs to be init before symbol__init()\n");
1983 if (symbol_conf
.init_annotation
) {
1984 pr_warning("Annotation being initialized multiple times\n");
1988 symbol_conf
.priv_size
+= sizeof(struct annotation
);
1989 symbol_conf
.init_annotation
= true;
1993 int symbol__init(struct perf_env
*env
)
1997 if (symbol_conf
.initialized
)
2000 symbol_conf
.priv_size
= PERF_ALIGN(symbol_conf
.priv_size
, sizeof(u64
));
2004 if (symbol_conf
.sort_by_name
)
2005 symbol_conf
.priv_size
+= (sizeof(struct symbol_name_rb_node
) -
2006 sizeof(struct symbol
));
2008 if (symbol_conf
.try_vmlinux_path
&& vmlinux_path__init(env
) < 0)
2011 if (symbol_conf
.field_sep
&& *symbol_conf
.field_sep
== '.') {
2012 pr_err("'.' is the only non valid --field-separator argument\n");
2016 if (setup_list(&symbol_conf
.dso_list
,
2017 symbol_conf
.dso_list_str
, "dso") < 0)
2020 if (setup_list(&symbol_conf
.comm_list
,
2021 symbol_conf
.comm_list_str
, "comm") < 0)
2022 goto out_free_dso_list
;
2024 if (setup_intlist(&symbol_conf
.pid_list
,
2025 symbol_conf
.pid_list_str
, "pid") < 0)
2026 goto out_free_comm_list
;
2028 if (setup_intlist(&symbol_conf
.tid_list
,
2029 symbol_conf
.tid_list_str
, "tid") < 0)
2030 goto out_free_pid_list
;
2032 if (setup_list(&symbol_conf
.sym_list
,
2033 symbol_conf
.sym_list_str
, "symbol") < 0)
2034 goto out_free_tid_list
;
2036 if (setup_list(&symbol_conf
.bt_stop_list
,
2037 symbol_conf
.bt_stop_list_str
, "symbol") < 0)
2038 goto out_free_sym_list
;
2041 * A path to symbols of "/" is identical to ""
2042 * reset here for simplicity.
2044 symfs
= realpath(symbol_conf
.symfs
, NULL
);
2046 symfs
= symbol_conf
.symfs
;
2047 if (strcmp(symfs
, "/") == 0)
2048 symbol_conf
.symfs
= "";
2049 if (symfs
!= symbol_conf
.symfs
)
2050 free((void *)symfs
);
2052 symbol_conf
.kptr_restrict
= symbol__read_kptr_restrict();
2054 symbol_conf
.initialized
= true;
2058 strlist__delete(symbol_conf
.sym_list
);
2060 intlist__delete(symbol_conf
.tid_list
);
2062 intlist__delete(symbol_conf
.pid_list
);
2064 strlist__delete(symbol_conf
.comm_list
);
2066 strlist__delete(symbol_conf
.dso_list
);
2070 void symbol__exit(void)
2072 if (!symbol_conf
.initialized
)
2074 strlist__delete(symbol_conf
.bt_stop_list
);
2075 strlist__delete(symbol_conf
.sym_list
);
2076 strlist__delete(symbol_conf
.dso_list
);
2077 strlist__delete(symbol_conf
.comm_list
);
2078 intlist__delete(symbol_conf
.tid_list
);
2079 intlist__delete(symbol_conf
.pid_list
);
2080 vmlinux_path__exit();
2081 symbol_conf
.sym_list
= symbol_conf
.dso_list
= symbol_conf
.comm_list
= NULL
;
2082 symbol_conf
.bt_stop_list
= NULL
;
2083 symbol_conf
.initialized
= false;
2086 int symbol__config_symfs(const struct option
*opt __maybe_unused
,
2087 const char *dir
, int unset __maybe_unused
)
2092 symbol_conf
.symfs
= strdup(dir
);
2093 if (symbol_conf
.symfs
== NULL
)
2096 /* skip the locally configured cache if a symfs is given, and
2097 * config buildid dir to symfs/.debug
2099 ret
= asprintf(&bf
, "%s/%s", dir
, ".debug");
2103 set_buildid_dir(bf
);