22 #include <symbol/kallsyms.h>
23 #include <sys/utsname.h>
25 static int dso__load_kernel_sym(struct dso
*dso
, struct map
*map
,
26 symbol_filter_t filter
);
27 static int dso__load_guest_kernel_sym(struct dso
*dso
, struct map
*map
,
28 symbol_filter_t filter
);
29 int vmlinux_path__nr_entries
;
32 struct symbol_conf symbol_conf
= {
34 .try_vmlinux_path
= true,
37 .demangle_kernel
= false,
38 .cumulate_callchain
= true,
39 .show_hist_headers
= true,
43 static enum dso_binary_type binary_type_symtab
[] = {
44 DSO_BINARY_TYPE__KALLSYMS
,
45 DSO_BINARY_TYPE__GUEST_KALLSYMS
,
46 DSO_BINARY_TYPE__JAVA_JIT
,
47 DSO_BINARY_TYPE__DEBUGLINK
,
48 DSO_BINARY_TYPE__BUILD_ID_CACHE
,
49 DSO_BINARY_TYPE__FEDORA_DEBUGINFO
,
50 DSO_BINARY_TYPE__UBUNTU_DEBUGINFO
,
51 DSO_BINARY_TYPE__BUILDID_DEBUGINFO
,
52 DSO_BINARY_TYPE__SYSTEM_PATH_DSO
,
53 DSO_BINARY_TYPE__GUEST_KMODULE
,
54 DSO_BINARY_TYPE__GUEST_KMODULE_COMP
,
55 DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE
,
56 DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP
,
57 DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO
,
58 DSO_BINARY_TYPE__NOT_FOUND
,
61 #define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab)
63 bool symbol_type__is_a(char symbol_type
, enum map_type map_type
)
65 symbol_type
= toupper(symbol_type
);
69 return symbol_type
== 'T' || symbol_type
== 'W';
71 return symbol_type
== 'D';
77 static int prefix_underscores_count(const char *str
)
79 const char *tail
= str
;
90 static int choose_best_symbol(struct symbol
*syma
, struct symbol
*symb
)
96 /* Prefer a symbol with non zero length */
97 a
= syma
->end
- syma
->start
;
98 b
= symb
->end
- symb
->start
;
99 if ((b
== 0) && (a
> 0))
101 else if ((a
== 0) && (b
> 0))
104 /* Prefer a non weak symbol over a weak one */
105 a
= syma
->binding
== STB_WEAK
;
106 b
= symb
->binding
== STB_WEAK
;
112 /* Prefer a global symbol over a non global one */
113 a
= syma
->binding
== STB_GLOBAL
;
114 b
= symb
->binding
== STB_GLOBAL
;
120 /* Prefer a symbol with less underscores */
121 a
= prefix_underscores_count(syma
->name
);
122 b
= prefix_underscores_count(symb
->name
);
128 /* Choose the symbol with the longest name */
129 na
= strlen(syma
->name
);
130 nb
= strlen(symb
->name
);
136 /* Avoid "SyS" kernel syscall aliases */
137 if (na
>= 3 && !strncmp(syma
->name
, "SyS", 3))
139 if (na
>= 10 && !strncmp(syma
->name
, "compat_SyS", 10))
145 void symbols__fixup_duplicate(struct rb_root
*symbols
)
148 struct symbol
*curr
, *next
;
150 nd
= rb_first(symbols
);
153 curr
= rb_entry(nd
, struct symbol
, rb_node
);
155 nd
= rb_next(&curr
->rb_node
);
156 next
= rb_entry(nd
, struct symbol
, rb_node
);
161 if (curr
->start
!= next
->start
)
164 if (choose_best_symbol(curr
, next
) == SYMBOL_A
) {
165 rb_erase(&next
->rb_node
, symbols
);
166 symbol__delete(next
);
169 nd
= rb_next(&curr
->rb_node
);
170 rb_erase(&curr
->rb_node
, symbols
);
171 symbol__delete(curr
);
176 void symbols__fixup_end(struct rb_root
*symbols
)
178 struct rb_node
*nd
, *prevnd
= rb_first(symbols
);
179 struct symbol
*curr
, *prev
;
184 curr
= rb_entry(prevnd
, struct symbol
, rb_node
);
186 for (nd
= rb_next(prevnd
); nd
; nd
= rb_next(nd
)) {
188 curr
= rb_entry(nd
, struct symbol
, rb_node
);
190 if (prev
->end
== prev
->start
&& prev
->end
!= curr
->start
)
191 prev
->end
= curr
->start
;
195 if (curr
->end
== curr
->start
)
196 curr
->end
= roundup(curr
->start
, 4096);
199 void __map_groups__fixup_end(struct map_groups
*mg
, enum map_type type
)
201 struct map
*prev
, *curr
;
202 struct rb_node
*nd
, *prevnd
= rb_first(&mg
->maps
[type
]);
207 curr
= rb_entry(prevnd
, struct map
, rb_node
);
209 for (nd
= rb_next(prevnd
); nd
; nd
= rb_next(nd
)) {
211 curr
= rb_entry(nd
, struct map
, rb_node
);
212 prev
->end
= curr
->start
;
216 * We still haven't the actual symbols, so guess the
217 * last map final address.
222 struct symbol
*symbol__new(u64 start
, u64 len
, u8 binding
, const char *name
)
224 size_t namelen
= strlen(name
) + 1;
225 struct symbol
*sym
= calloc(1, (symbol_conf
.priv_size
+
226 sizeof(*sym
) + namelen
));
230 if (symbol_conf
.priv_size
)
231 sym
= ((void *)sym
) + symbol_conf
.priv_size
;
234 sym
->end
= len
? start
+ len
: start
;
235 sym
->binding
= binding
;
236 sym
->namelen
= namelen
- 1;
238 pr_debug4("%s: %s %#" PRIx64
"-%#" PRIx64
"\n",
239 __func__
, name
, start
, sym
->end
);
240 memcpy(sym
->name
, name
, namelen
);
245 void symbol__delete(struct symbol
*sym
)
247 free(((void *)sym
) - symbol_conf
.priv_size
);
250 size_t symbol__fprintf(struct symbol
*sym
, FILE *fp
)
252 return fprintf(fp
, " %" PRIx64
"-%" PRIx64
" %c %s\n",
253 sym
->start
, sym
->end
,
254 sym
->binding
== STB_GLOBAL
? 'g' :
255 sym
->binding
== STB_LOCAL
? 'l' : 'w',
259 size_t symbol__fprintf_symname_offs(const struct symbol
*sym
,
260 const struct addr_location
*al
, FILE *fp
)
262 unsigned long offset
;
265 if (sym
&& sym
->name
) {
266 length
= fprintf(fp
, "%s", sym
->name
);
268 if (al
->addr
< sym
->end
)
269 offset
= al
->addr
- sym
->start
;
271 offset
= al
->addr
- al
->map
->start
- sym
->start
;
272 length
+= fprintf(fp
, "+0x%lx", offset
);
276 return fprintf(fp
, "[unknown]");
279 size_t symbol__fprintf_symname(const struct symbol
*sym
, FILE *fp
)
281 return symbol__fprintf_symname_offs(sym
, NULL
, fp
);
284 void symbols__delete(struct rb_root
*symbols
)
287 struct rb_node
*next
= rb_first(symbols
);
290 pos
= rb_entry(next
, struct symbol
, rb_node
);
291 next
= rb_next(&pos
->rb_node
);
292 rb_erase(&pos
->rb_node
, symbols
);
297 void symbols__insert(struct rb_root
*symbols
, struct symbol
*sym
)
299 struct rb_node
**p
= &symbols
->rb_node
;
300 struct rb_node
*parent
= NULL
;
301 const u64 ip
= sym
->start
;
306 s
= rb_entry(parent
, struct symbol
, rb_node
);
312 rb_link_node(&sym
->rb_node
, parent
, p
);
313 rb_insert_color(&sym
->rb_node
, symbols
);
316 static struct symbol
*symbols__find(struct rb_root
*symbols
, u64 ip
)
323 n
= symbols
->rb_node
;
326 struct symbol
*s
= rb_entry(n
, struct symbol
, rb_node
);
330 else if (ip
>= s
->end
)
339 static struct symbol
*symbols__first(struct rb_root
*symbols
)
341 struct rb_node
*n
= rb_first(symbols
);
344 return rb_entry(n
, struct symbol
, rb_node
);
349 static struct symbol
*symbols__next(struct symbol
*sym
)
351 struct rb_node
*n
= rb_next(&sym
->rb_node
);
354 return rb_entry(n
, struct symbol
, rb_node
);
359 struct symbol_name_rb_node
{
360 struct rb_node rb_node
;
364 static void symbols__insert_by_name(struct rb_root
*symbols
, struct symbol
*sym
)
366 struct rb_node
**p
= &symbols
->rb_node
;
367 struct rb_node
*parent
= NULL
;
368 struct symbol_name_rb_node
*symn
, *s
;
370 symn
= container_of(sym
, struct symbol_name_rb_node
, sym
);
374 s
= rb_entry(parent
, struct symbol_name_rb_node
, rb_node
);
375 if (strcmp(sym
->name
, s
->sym
.name
) < 0)
380 rb_link_node(&symn
->rb_node
, parent
, p
);
381 rb_insert_color(&symn
->rb_node
, symbols
);
384 static void symbols__sort_by_name(struct rb_root
*symbols
,
385 struct rb_root
*source
)
389 for (nd
= rb_first(source
); nd
; nd
= rb_next(nd
)) {
390 struct symbol
*pos
= rb_entry(nd
, struct symbol
, rb_node
);
391 symbols__insert_by_name(symbols
, pos
);
395 static struct symbol
*symbols__find_by_name(struct rb_root
*symbols
,
399 struct symbol_name_rb_node
*s
;
404 n
= symbols
->rb_node
;
409 s
= rb_entry(n
, struct symbol_name_rb_node
, rb_node
);
410 cmp
= strcmp(name
, s
->sym
.name
);
423 /* return first symbol that has same name (if any) */
424 for (n
= rb_prev(n
); n
; n
= rb_prev(n
)) {
425 struct symbol_name_rb_node
*tmp
;
427 tmp
= rb_entry(n
, struct symbol_name_rb_node
, rb_node
);
428 if (strcmp(tmp
->sym
.name
, s
->sym
.name
))
437 struct symbol
*dso__find_symbol(struct dso
*dso
,
438 enum map_type type
, u64 addr
)
440 return symbols__find(&dso
->symbols
[type
], addr
);
443 struct symbol
*dso__first_symbol(struct dso
*dso
, enum map_type type
)
445 return symbols__first(&dso
->symbols
[type
]);
448 struct symbol
*dso__next_symbol(struct symbol
*sym
)
450 return symbols__next(sym
);
453 struct symbol
*symbol__next_by_name(struct symbol
*sym
)
455 struct symbol_name_rb_node
*s
= container_of(sym
, struct symbol_name_rb_node
, sym
);
456 struct rb_node
*n
= rb_next(&s
->rb_node
);
458 return n
? &rb_entry(n
, struct symbol_name_rb_node
, rb_node
)->sym
: NULL
;
462 * Teturns first symbol that matched with @name.
464 struct symbol
*dso__find_symbol_by_name(struct dso
*dso
, enum map_type type
,
467 return symbols__find_by_name(&dso
->symbol_names
[type
], name
);
470 void dso__sort_by_name(struct dso
*dso
, enum map_type type
)
472 dso__set_sorted_by_name(dso
, type
);
473 return symbols__sort_by_name(&dso
->symbol_names
[type
],
474 &dso
->symbols
[type
]);
477 size_t dso__fprintf_symbols_by_name(struct dso
*dso
,
478 enum map_type type
, FILE *fp
)
482 struct symbol_name_rb_node
*pos
;
484 for (nd
= rb_first(&dso
->symbol_names
[type
]); nd
; nd
= rb_next(nd
)) {
485 pos
= rb_entry(nd
, struct symbol_name_rb_node
, rb_node
);
486 fprintf(fp
, "%s\n", pos
->sym
.name
);
492 int modules__parse(const char *filename
, void *arg
,
493 int (*process_module
)(void *arg
, const char *name
,
501 file
= fopen(filename
, "r");
511 line_len
= getline(&line
, &n
, file
);
524 line
[--line_len
] = '\0'; /* \n */
526 sep
= strrchr(line
, 'x');
530 hex2u64(sep
+ 1, &start
);
532 sep
= strchr(line
, ' ');
538 scnprintf(name
, sizeof(name
), "[%s]", line
);
540 err
= process_module(arg
, name
, start
);
550 struct process_kallsyms_args
{
556 * These are symbols in the kernel image, so make sure that
557 * sym is from a kernel DSO.
559 bool symbol__is_idle(struct symbol
*sym
)
561 const char * const idle_symbols
[] = {
570 "mwait_idle_with_hints",
572 "ppc64_runlatch_off",
573 "pseries_dedicated_idle_sleep",
582 for (i
= 0; idle_symbols
[i
]; i
++) {
583 if (!strcmp(idle_symbols
[i
], sym
->name
))
590 static int map__process_kallsym_symbol(void *arg
, const char *name
,
591 char type
, u64 start
)
594 struct process_kallsyms_args
*a
= arg
;
595 struct rb_root
*root
= &a
->dso
->symbols
[a
->map
->type
];
597 if (!symbol_type__is_a(type
, a
->map
->type
))
601 * module symbols are not sorted so we add all
602 * symbols, setting length to 0, and rely on
603 * symbols__fixup_end() to fix it up.
605 sym
= symbol__new(start
, 0, kallsyms2elf_type(type
), name
);
609 * We will pass the symbols to the filter later, in
610 * map__split_kallsyms, when we have split the maps per module
612 symbols__insert(root
, sym
);
618 * Loads the function entries in /proc/kallsyms into kernel_map->dso,
619 * so that we can in the next step set the symbol ->end address and then
620 * call kernel_maps__split_kallsyms.
622 static int dso__load_all_kallsyms(struct dso
*dso
, const char *filename
,
625 struct process_kallsyms_args args
= { .map
= map
, .dso
= dso
, };
626 return kallsyms__parse(filename
, &args
, map__process_kallsym_symbol
);
629 static int dso__split_kallsyms_for_kcore(struct dso
*dso
, struct map
*map
,
630 symbol_filter_t filter
)
632 struct map_groups
*kmaps
= map__kmap(map
)->kmaps
;
633 struct map
*curr_map
;
635 int count
= 0, moved
= 0;
636 struct rb_root
*root
= &dso
->symbols
[map
->type
];
637 struct rb_node
*next
= rb_first(root
);
642 pos
= rb_entry(next
, struct symbol
, rb_node
);
643 next
= rb_next(&pos
->rb_node
);
645 module
= strchr(pos
->name
, '\t');
649 curr_map
= map_groups__find(kmaps
, map
->type
, pos
->start
);
651 if (!curr_map
|| (filter
&& filter(curr_map
, pos
))) {
652 rb_erase(&pos
->rb_node
, root
);
655 pos
->start
-= curr_map
->start
- curr_map
->pgoff
;
657 pos
->end
-= curr_map
->start
- curr_map
->pgoff
;
658 if (curr_map
!= map
) {
659 rb_erase(&pos
->rb_node
, root
);
661 &curr_map
->dso
->symbols
[curr_map
->type
],
670 /* Symbols have been adjusted */
671 dso
->adjust_symbols
= 1;
673 return count
+ moved
;
677 * Split the symbols into maps, making sure there are no overlaps, i.e. the
678 * kernel range is broken in several maps, named [kernel].N, as we don't have
679 * the original ELF section names vmlinux have.
681 static int dso__split_kallsyms(struct dso
*dso
, struct map
*map
, u64 delta
,
682 symbol_filter_t filter
)
684 struct map_groups
*kmaps
= map__kmap(map
)->kmaps
;
685 struct machine
*machine
= kmaps
->machine
;
686 struct map
*curr_map
= map
;
688 int count
= 0, moved
= 0;
689 struct rb_root
*root
= &dso
->symbols
[map
->type
];
690 struct rb_node
*next
= rb_first(root
);
691 int kernel_range
= 0;
696 pos
= rb_entry(next
, struct symbol
, rb_node
);
697 next
= rb_next(&pos
->rb_node
);
699 module
= strchr(pos
->name
, '\t');
701 if (!symbol_conf
.use_modules
)
706 if (strcmp(curr_map
->dso
->short_name
, module
)) {
707 if (curr_map
!= map
&&
708 dso
->kernel
== DSO_TYPE_GUEST_KERNEL
&&
709 machine__is_default_guest(machine
)) {
711 * We assume all symbols of a module are
712 * continuous in * kallsyms, so curr_map
713 * points to a module and all its
714 * symbols are in its kmap. Mark it as
717 dso__set_loaded(curr_map
->dso
,
721 curr_map
= map_groups__find_by_name(kmaps
,
723 if (curr_map
== NULL
) {
724 pr_debug("%s/proc/{kallsyms,modules} "
725 "inconsistency while looking "
726 "for \"%s\" module!\n",
727 machine
->root_dir
, module
);
732 if (curr_map
->dso
->loaded
&&
733 !machine__is_default_guest(machine
))
737 * So that we look just like we get from .ko files,
738 * i.e. not prelinked, relative to map->start.
740 pos
->start
= curr_map
->map_ip(curr_map
, pos
->start
);
741 pos
->end
= curr_map
->map_ip(curr_map
, pos
->end
);
742 } else if (curr_map
!= map
) {
743 char dso_name
[PATH_MAX
];
747 /* Kernel was relocated at boot time */
757 if (dso
->kernel
== DSO_TYPE_GUEST_KERNEL
)
758 snprintf(dso_name
, sizeof(dso_name
),
762 snprintf(dso_name
, sizeof(dso_name
),
766 ndso
= dso__new(dso_name
);
770 ndso
->kernel
= dso
->kernel
;
772 curr_map
= map__new2(pos
->start
, ndso
, map
->type
);
773 if (curr_map
== NULL
) {
778 curr_map
->map_ip
= curr_map
->unmap_ip
= identity__map_ip
;
779 map_groups__insert(kmaps
, curr_map
);
782 /* Kernel was relocated at boot time */
787 if (filter
&& filter(curr_map
, pos
)) {
788 discard_symbol
: rb_erase(&pos
->rb_node
, root
);
791 if (curr_map
!= map
) {
792 rb_erase(&pos
->rb_node
, root
);
793 symbols__insert(&curr_map
->dso
->symbols
[curr_map
->type
], pos
);
800 if (curr_map
!= map
&&
801 dso
->kernel
== DSO_TYPE_GUEST_KERNEL
&&
802 machine__is_default_guest(kmaps
->machine
)) {
803 dso__set_loaded(curr_map
->dso
, curr_map
->type
);
806 return count
+ moved
;
809 bool symbol__restricted_filename(const char *filename
,
810 const char *restricted_filename
)
812 bool restricted
= false;
814 if (symbol_conf
.kptr_restrict
) {
815 char *r
= realpath(filename
, NULL
);
818 restricted
= strcmp(r
, restricted_filename
) == 0;
828 struct rb_node rb_node
;
833 static void add_module(struct module_info
*mi
, struct rb_root
*modules
)
835 struct rb_node
**p
= &modules
->rb_node
;
836 struct rb_node
*parent
= NULL
;
837 struct module_info
*m
;
841 m
= rb_entry(parent
, struct module_info
, rb_node
);
842 if (strcmp(mi
->name
, m
->name
) < 0)
847 rb_link_node(&mi
->rb_node
, parent
, p
);
848 rb_insert_color(&mi
->rb_node
, modules
);
851 static void delete_modules(struct rb_root
*modules
)
853 struct module_info
*mi
;
854 struct rb_node
*next
= rb_first(modules
);
857 mi
= rb_entry(next
, struct module_info
, rb_node
);
858 next
= rb_next(&mi
->rb_node
);
859 rb_erase(&mi
->rb_node
, modules
);
865 static struct module_info
*find_module(const char *name
,
866 struct rb_root
*modules
)
868 struct rb_node
*n
= modules
->rb_node
;
871 struct module_info
*m
;
874 m
= rb_entry(n
, struct module_info
, rb_node
);
875 cmp
= strcmp(name
, m
->name
);
887 static int __read_proc_modules(void *arg
, const char *name
, u64 start
)
889 struct rb_root
*modules
= arg
;
890 struct module_info
*mi
;
892 mi
= zalloc(sizeof(struct module_info
));
896 mi
->name
= strdup(name
);
904 add_module(mi
, modules
);
909 static int read_proc_modules(const char *filename
, struct rb_root
*modules
)
911 if (symbol__restricted_filename(filename
, "/proc/modules"))
914 if (modules__parse(filename
, modules
, __read_proc_modules
)) {
915 delete_modules(modules
);
922 int compare_proc_modules(const char *from
, const char *to
)
924 struct rb_root from_modules
= RB_ROOT
;
925 struct rb_root to_modules
= RB_ROOT
;
926 struct rb_node
*from_node
, *to_node
;
927 struct module_info
*from_m
, *to_m
;
930 if (read_proc_modules(from
, &from_modules
))
933 if (read_proc_modules(to
, &to_modules
))
934 goto out_delete_from
;
936 from_node
= rb_first(&from_modules
);
937 to_node
= rb_first(&to_modules
);
942 from_m
= rb_entry(from_node
, struct module_info
, rb_node
);
943 to_m
= rb_entry(to_node
, struct module_info
, rb_node
);
945 if (from_m
->start
!= to_m
->start
||
946 strcmp(from_m
->name
, to_m
->name
))
949 from_node
= rb_next(from_node
);
950 to_node
= rb_next(to_node
);
953 if (!from_node
&& !to_node
)
956 delete_modules(&to_modules
);
958 delete_modules(&from_modules
);
963 static int do_validate_kcore_modules(const char *filename
, struct map
*map
,
964 struct map_groups
*kmaps
)
966 struct rb_root modules
= RB_ROOT
;
970 err
= read_proc_modules(filename
, &modules
);
974 old_map
= map_groups__first(kmaps
, map
->type
);
976 struct map
*next
= map_groups__next(old_map
);
977 struct module_info
*mi
;
979 if (old_map
== map
|| old_map
->start
== map
->start
) {
985 /* Module must be in memory at the same address */
986 mi
= find_module(old_map
->dso
->short_name
, &modules
);
987 if (!mi
|| mi
->start
!= old_map
->start
) {
995 delete_modules(&modules
);
1000 * If kallsyms is referenced by name then we look for filename in the same
1003 static bool filename_from_kallsyms_filename(char *filename
,
1004 const char *base_name
,
1005 const char *kallsyms_filename
)
1009 strcpy(filename
, kallsyms_filename
);
1010 name
= strrchr(filename
, '/');
1016 if (!strcmp(name
, "kallsyms")) {
1017 strcpy(name
, base_name
);
1024 static int validate_kcore_modules(const char *kallsyms_filename
,
1027 struct map_groups
*kmaps
= map__kmap(map
)->kmaps
;
1028 char modules_filename
[PATH_MAX
];
1030 if (!filename_from_kallsyms_filename(modules_filename
, "modules",
1034 if (do_validate_kcore_modules(modules_filename
, map
, kmaps
))
1040 static int validate_kcore_addresses(const char *kallsyms_filename
,
1043 struct kmap
*kmap
= map__kmap(map
);
1045 if (kmap
->ref_reloc_sym
&& kmap
->ref_reloc_sym
->name
) {
1048 start
= kallsyms__get_function_start(kallsyms_filename
,
1049 kmap
->ref_reloc_sym
->name
);
1050 if (start
!= kmap
->ref_reloc_sym
->addr
)
1054 return validate_kcore_modules(kallsyms_filename
, map
);
1057 struct kcore_mapfn_data
{
1060 struct list_head maps
;
1063 static int kcore_mapfn(u64 start
, u64 len
, u64 pgoff
, void *data
)
1065 struct kcore_mapfn_data
*md
= data
;
1068 map
= map__new2(start
, md
->dso
, md
->type
);
1072 map
->end
= map
->start
+ len
;
1075 list_add(&map
->node
, &md
->maps
);
1080 static int dso__load_kcore(struct dso
*dso
, struct map
*map
,
1081 const char *kallsyms_filename
)
1083 struct map_groups
*kmaps
= map__kmap(map
)->kmaps
;
1084 struct machine
*machine
= kmaps
->machine
;
1085 struct kcore_mapfn_data md
;
1086 struct map
*old_map
, *new_map
, *replacement_map
= NULL
;
1089 char kcore_filename
[PATH_MAX
];
1092 /* This function requires that the map is the kernel map */
1093 if (map
!= machine
->vmlinux_maps
[map
->type
])
1096 if (!filename_from_kallsyms_filename(kcore_filename
, "kcore",
1100 /* Modules and kernel must be present at their original addresses */
1101 if (validate_kcore_addresses(kallsyms_filename
, map
))
1105 md
.type
= map
->type
;
1106 INIT_LIST_HEAD(&md
.maps
);
1108 fd
= open(kcore_filename
, O_RDONLY
);
1112 /* Read new maps into temporary lists */
1113 err
= file__read_maps(fd
, md
.type
== MAP__FUNCTION
, kcore_mapfn
, &md
,
1117 dso
->is_64_bit
= is_64_bit
;
1119 if (list_empty(&md
.maps
)) {
1124 /* Remove old maps */
1125 old_map
= map_groups__first(kmaps
, map
->type
);
1127 struct map
*next
= map_groups__next(old_map
);
1130 map_groups__remove(kmaps
, old_map
);
1134 /* Find the kernel map using the first symbol */
1135 sym
= dso__first_symbol(dso
, map
->type
);
1136 list_for_each_entry(new_map
, &md
.maps
, node
) {
1137 if (sym
&& sym
->start
>= new_map
->start
&&
1138 sym
->start
< new_map
->end
) {
1139 replacement_map
= new_map
;
1144 if (!replacement_map
)
1145 replacement_map
= list_entry(md
.maps
.next
, struct map
, node
);
1148 while (!list_empty(&md
.maps
)) {
1149 new_map
= list_entry(md
.maps
.next
, struct map
, node
);
1150 list_del(&new_map
->node
);
1151 if (new_map
== replacement_map
) {
1152 map
->start
= new_map
->start
;
1153 map
->end
= new_map
->end
;
1154 map
->pgoff
= new_map
->pgoff
;
1155 map
->map_ip
= new_map
->map_ip
;
1156 map
->unmap_ip
= new_map
->unmap_ip
;
1157 map__delete(new_map
);
1158 /* Ensure maps are correctly ordered */
1159 map_groups__remove(kmaps
, map
);
1160 map_groups__insert(kmaps
, map
);
1162 map_groups__insert(kmaps
, new_map
);
1167 * Set the data type and long name so that kcore can be read via
1168 * dso__data_read_addr().
1170 if (dso
->kernel
== DSO_TYPE_GUEST_KERNEL
)
1171 dso
->binary_type
= DSO_BINARY_TYPE__GUEST_KCORE
;
1173 dso
->binary_type
= DSO_BINARY_TYPE__KCORE
;
1174 dso__set_long_name(dso
, strdup(kcore_filename
), true);
1178 if (map
->type
== MAP__FUNCTION
)
1179 pr_debug("Using %s for kernel object code\n", kcore_filename
);
1181 pr_debug("Using %s for kernel data\n", kcore_filename
);
1186 while (!list_empty(&md
.maps
)) {
1187 map
= list_entry(md
.maps
.next
, struct map
, node
);
1188 list_del(&map
->node
);
1196 * If the kernel is relocated at boot time, kallsyms won't match. Compute the
1197 * delta based on the relocation reference symbol.
1199 static int kallsyms__delta(struct map
*map
, const char *filename
, u64
*delta
)
1201 struct kmap
*kmap
= map__kmap(map
);
1204 if (!kmap
->ref_reloc_sym
|| !kmap
->ref_reloc_sym
->name
)
1207 addr
= kallsyms__get_function_start(filename
,
1208 kmap
->ref_reloc_sym
->name
);
1212 *delta
= addr
- kmap
->ref_reloc_sym
->addr
;
1216 int dso__load_kallsyms(struct dso
*dso
, const char *filename
,
1217 struct map
*map
, symbol_filter_t filter
)
1221 if (symbol__restricted_filename(filename
, "/proc/kallsyms"))
1224 if (dso__load_all_kallsyms(dso
, filename
, map
) < 0)
1227 if (kallsyms__delta(map
, filename
, &delta
))
1230 symbols__fixup_duplicate(&dso
->symbols
[map
->type
]);
1231 symbols__fixup_end(&dso
->symbols
[map
->type
]);
1233 if (dso
->kernel
== DSO_TYPE_GUEST_KERNEL
)
1234 dso
->symtab_type
= DSO_BINARY_TYPE__GUEST_KALLSYMS
;
1236 dso
->symtab_type
= DSO_BINARY_TYPE__KALLSYMS
;
1238 if (!dso__load_kcore(dso
, map
, filename
))
1239 return dso__split_kallsyms_for_kcore(dso
, map
, filter
);
1241 return dso__split_kallsyms(dso
, map
, delta
, filter
);
1244 static int dso__load_perf_map(struct dso
*dso
, struct map
*map
,
1245 symbol_filter_t filter
)
1252 file
= fopen(dso
->long_name
, "r");
1256 while (!feof(file
)) {
1261 line_len
= getline(&line
, &n
, file
);
1268 line
[--line_len
] = '\0'; /* \n */
1270 len
= hex2u64(line
, &start
);
1273 if (len
+ 2 >= line_len
)
1276 len
+= hex2u64(line
+ len
, &size
);
1279 if (len
+ 2 >= line_len
)
1282 sym
= symbol__new(start
, size
, STB_GLOBAL
, line
+ len
);
1285 goto out_delete_line
;
1287 if (filter
&& filter(map
, sym
))
1288 symbol__delete(sym
);
1290 symbols__insert(&dso
->symbols
[map
->type
], sym
);
1306 static bool dso__is_compatible_symtab_type(struct dso
*dso
, bool kmod
,
1307 enum dso_binary_type type
)
1310 case DSO_BINARY_TYPE__JAVA_JIT
:
1311 case DSO_BINARY_TYPE__DEBUGLINK
:
1312 case DSO_BINARY_TYPE__SYSTEM_PATH_DSO
:
1313 case DSO_BINARY_TYPE__FEDORA_DEBUGINFO
:
1314 case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO
:
1315 case DSO_BINARY_TYPE__BUILDID_DEBUGINFO
:
1316 case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO
:
1317 return !kmod
&& dso
->kernel
== DSO_TYPE_USER
;
1319 case DSO_BINARY_TYPE__KALLSYMS
:
1320 case DSO_BINARY_TYPE__VMLINUX
:
1321 case DSO_BINARY_TYPE__KCORE
:
1322 return dso
->kernel
== DSO_TYPE_KERNEL
;
1324 case DSO_BINARY_TYPE__GUEST_KALLSYMS
:
1325 case DSO_BINARY_TYPE__GUEST_VMLINUX
:
1326 case DSO_BINARY_TYPE__GUEST_KCORE
:
1327 return dso
->kernel
== DSO_TYPE_GUEST_KERNEL
;
1329 case DSO_BINARY_TYPE__GUEST_KMODULE
:
1330 case DSO_BINARY_TYPE__GUEST_KMODULE_COMP
:
1331 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE
:
1332 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP
:
1334 * kernel modules know their symtab type - it's set when
1335 * creating a module dso in machine__new_module().
1337 return kmod
&& dso
->symtab_type
== type
;
1339 case DSO_BINARY_TYPE__BUILD_ID_CACHE
:
1342 case DSO_BINARY_TYPE__NOT_FOUND
:
1348 int dso__load(struct dso
*dso
, struct map
*map
, symbol_filter_t filter
)
1353 struct machine
*machine
;
1354 char *root_dir
= (char *) "";
1356 struct symsrc ss_
[2];
1357 struct symsrc
*syms_ss
= NULL
, *runtime_ss
= NULL
;
1360 dso__set_loaded(dso
, map
->type
);
1362 if (dso
->kernel
== DSO_TYPE_KERNEL
)
1363 return dso__load_kernel_sym(dso
, map
, filter
);
1364 else if (dso
->kernel
== DSO_TYPE_GUEST_KERNEL
)
1365 return dso__load_guest_kernel_sym(dso
, map
, filter
);
1367 if (map
->groups
&& map
->groups
->machine
)
1368 machine
= map
->groups
->machine
;
1372 dso
->adjust_symbols
= 0;
1374 if (strncmp(dso
->name
, "/tmp/perf-", 10) == 0) {
1377 if (lstat(dso
->name
, &st
) < 0)
1380 if (st
.st_uid
&& (st
.st_uid
!= geteuid())) {
1381 pr_warning("File %s not owned by current user or root, "
1382 "ignoring it.\n", dso
->name
);
1386 ret
= dso__load_perf_map(dso
, map
, filter
);
1387 dso
->symtab_type
= ret
> 0 ? DSO_BINARY_TYPE__JAVA_JIT
:
1388 DSO_BINARY_TYPE__NOT_FOUND
;
1393 root_dir
= machine
->root_dir
;
1395 name
= malloc(PATH_MAX
);
1399 kmod
= dso
->symtab_type
== DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE
||
1400 dso
->symtab_type
== DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP
||
1401 dso
->symtab_type
== DSO_BINARY_TYPE__GUEST_KMODULE
||
1402 dso
->symtab_type
== DSO_BINARY_TYPE__GUEST_KMODULE_COMP
;
1405 * Iterate over candidate debug images.
1406 * Keep track of "interesting" ones (those which have a symtab, dynsym,
1407 * and/or opd section) for processing.
1409 for (i
= 0; i
< DSO_BINARY_TYPE__SYMTAB_CNT
; i
++) {
1410 struct symsrc
*ss
= &ss_
[ss_pos
];
1411 bool next_slot
= false;
1413 enum dso_binary_type symtab_type
= binary_type_symtab
[i
];
1415 if (!dso__is_compatible_symtab_type(dso
, kmod
, symtab_type
))
1418 if (dso__read_binary_type_filename(dso
, symtab_type
,
1419 root_dir
, name
, PATH_MAX
))
1422 /* Name is now the name of the next image to try */
1423 if (symsrc__init(ss
, dso
, name
, symtab_type
) < 0)
1426 if (!syms_ss
&& symsrc__has_symtab(ss
)) {
1429 if (!dso
->symsrc_filename
)
1430 dso
->symsrc_filename
= strdup(name
);
1433 if (!runtime_ss
&& symsrc__possibly_runtime(ss
)) {
1441 if (syms_ss
&& runtime_ss
)
1444 symsrc__destroy(ss
);
1449 if (!runtime_ss
&& !syms_ss
)
1452 if (runtime_ss
&& !syms_ss
) {
1453 syms_ss
= runtime_ss
;
1456 /* We'll have to hope for the best */
1457 if (!runtime_ss
&& syms_ss
)
1458 runtime_ss
= syms_ss
;
1461 ret
= dso__load_sym(dso
, map
, syms_ss
, runtime_ss
, filter
, kmod
);
1468 nr_plt
= dso__synthesize_plt_symbols(dso
, runtime_ss
, map
, filter
);
1473 for (; ss_pos
> 0; ss_pos
--)
1474 symsrc__destroy(&ss_
[ss_pos
- 1]);
1477 if (ret
< 0 && strstr(dso
->name
, " (deleted)") != NULL
)
1482 struct map
*map_groups__find_by_name(struct map_groups
*mg
,
1483 enum map_type type
, const char *name
)
1487 for (nd
= rb_first(&mg
->maps
[type
]); nd
; nd
= rb_next(nd
)) {
1488 struct map
*map
= rb_entry(nd
, struct map
, rb_node
);
1490 if (map
->dso
&& strcmp(map
->dso
->short_name
, name
) == 0)
1497 int dso__load_vmlinux(struct dso
*dso
, struct map
*map
,
1498 const char *vmlinux
, bool vmlinux_allocated
,
1499 symbol_filter_t filter
)
1503 char symfs_vmlinux
[PATH_MAX
];
1504 enum dso_binary_type symtab_type
;
1506 if (vmlinux
[0] == '/')
1507 snprintf(symfs_vmlinux
, sizeof(symfs_vmlinux
), "%s", vmlinux
);
1509 symbol__join_symfs(symfs_vmlinux
, vmlinux
);
1511 if (dso
->kernel
== DSO_TYPE_GUEST_KERNEL
)
1512 symtab_type
= DSO_BINARY_TYPE__GUEST_VMLINUX
;
1514 symtab_type
= DSO_BINARY_TYPE__VMLINUX
;
1516 if (symsrc__init(&ss
, dso
, symfs_vmlinux
, symtab_type
))
1519 err
= dso__load_sym(dso
, map
, &ss
, &ss
, filter
, 0);
1520 symsrc__destroy(&ss
);
1523 if (dso
->kernel
== DSO_TYPE_GUEST_KERNEL
)
1524 dso
->binary_type
= DSO_BINARY_TYPE__GUEST_VMLINUX
;
1526 dso
->binary_type
= DSO_BINARY_TYPE__VMLINUX
;
1527 dso__set_long_name(dso
, vmlinux
, vmlinux_allocated
);
1528 dso__set_loaded(dso
, map
->type
);
1529 pr_debug("Using %s for symbols\n", symfs_vmlinux
);
1535 int dso__load_vmlinux_path(struct dso
*dso
, struct map
*map
,
1536 symbol_filter_t filter
)
1539 char *filename
= NULL
;
1541 if (!symbol_conf
.ignore_vmlinux_buildid
)
1542 filename
= dso__build_id_filename(dso
, NULL
, 0);
1543 if (filename
!= NULL
) {
1544 err
= dso__load_vmlinux(dso
, map
, filename
, true, filter
);
1550 pr_debug("Looking at the vmlinux_path (%d entries long)\n",
1551 vmlinux_path__nr_entries
+ 1);
1553 for (i
= 0; i
< vmlinux_path__nr_entries
; ++i
) {
1554 err
= dso__load_vmlinux(dso
, map
, vmlinux_path
[i
], false, filter
);
1562 static int find_matching_kcore(struct map
*map
, char *dir
, size_t dir_sz
)
1564 char kallsyms_filename
[PATH_MAX
];
1565 struct dirent
*dent
;
1577 if (dent
->d_type
!= DT_DIR
)
1579 scnprintf(kallsyms_filename
, sizeof(kallsyms_filename
),
1580 "%s/%s/kallsyms", dir
, dent
->d_name
);
1581 if (!validate_kcore_addresses(kallsyms_filename
, map
)) {
1582 strlcpy(dir
, kallsyms_filename
, dir_sz
);
1593 static char *dso__find_kallsyms(struct dso
*dso
, struct map
*map
)
1595 u8 host_build_id
[BUILD_ID_SIZE
];
1596 char sbuild_id
[BUILD_ID_SIZE
* 2 + 1];
1597 bool is_host
= false;
1598 char path
[PATH_MAX
];
1600 if (!dso
->has_build_id
) {
1602 * Last resort, if we don't have a build-id and couldn't find
1603 * any vmlinux file, try the running kernel kallsyms table.
1608 if (sysfs__read_build_id("/sys/kernel/notes", host_build_id
,
1609 sizeof(host_build_id
)) == 0)
1610 is_host
= dso__build_id_equal(dso
, host_build_id
);
1612 build_id__sprintf(dso
->build_id
, sizeof(dso
->build_id
), sbuild_id
);
1614 scnprintf(path
, sizeof(path
), "%s/[kernel.kcore]/%s", buildid_dir
,
1617 /* Use /proc/kallsyms if possible */
1622 /* If no cached kcore go with /proc/kallsyms */
1629 * Do not check the build-id cache, until we know we cannot use
1632 fd
= open("/proc/kcore", O_RDONLY
);
1635 /* If module maps match go with /proc/kallsyms */
1636 if (!validate_kcore_addresses("/proc/kallsyms", map
))
1640 /* Find kallsyms in build-id cache with kcore */
1641 if (!find_matching_kcore(map
, path
, sizeof(path
)))
1642 return strdup(path
);
1647 /* Find kallsyms in build-id cache with kcore */
1648 if (!find_matching_kcore(map
, path
, sizeof(path
)))
1649 return strdup(path
);
1651 scnprintf(path
, sizeof(path
), "%s/[kernel.kallsyms]/%s",
1652 buildid_dir
, sbuild_id
);
1654 if (access(path
, F_OK
)) {
1655 pr_err("No kallsyms or vmlinux with build-id %s was found\n",
1660 return strdup(path
);
1663 return strdup("/proc/kallsyms");
1666 static int dso__load_kernel_sym(struct dso
*dso
, struct map
*map
,
1667 symbol_filter_t filter
)
1670 const char *kallsyms_filename
= NULL
;
1671 char *kallsyms_allocated_filename
= NULL
;
1673 * Step 1: if the user specified a kallsyms or vmlinux filename, use
1674 * it and only it, reporting errors to the user if it cannot be used.
1676 * For instance, try to analyse an ARM perf.data file _without_ a
1677 * build-id, or if the user specifies the wrong path to the right
1678 * vmlinux file, obviously we can't fallback to another vmlinux (a
1679 * x86_86 one, on the machine where analysis is being performed, say),
1680 * or worse, /proc/kallsyms.
1682 * If the specified file _has_ a build-id and there is a build-id
1683 * section in the perf.data file, we will still do the expected
1684 * validation in dso__load_vmlinux and will bail out if they don't
1687 if (symbol_conf
.kallsyms_name
!= NULL
) {
1688 kallsyms_filename
= symbol_conf
.kallsyms_name
;
1692 if (!symbol_conf
.ignore_vmlinux
&& symbol_conf
.vmlinux_name
!= NULL
) {
1693 return dso__load_vmlinux(dso
, map
, symbol_conf
.vmlinux_name
,
1697 if (!symbol_conf
.ignore_vmlinux
&& vmlinux_path
!= NULL
) {
1698 err
= dso__load_vmlinux_path(dso
, map
, filter
);
1703 /* do not try local files if a symfs was given */
1704 if (symbol_conf
.symfs
[0] != 0)
1707 kallsyms_allocated_filename
= dso__find_kallsyms(dso
, map
);
1708 if (!kallsyms_allocated_filename
)
1711 kallsyms_filename
= kallsyms_allocated_filename
;
1714 err
= dso__load_kallsyms(dso
, kallsyms_filename
, map
, filter
);
1716 pr_debug("Using %s for symbols\n", kallsyms_filename
);
1717 free(kallsyms_allocated_filename
);
1719 if (err
> 0 && !dso__is_kcore(dso
)) {
1720 dso
->binary_type
= DSO_BINARY_TYPE__KALLSYMS
;
1721 dso__set_long_name(dso
, "[kernel.kallsyms]", false);
1722 map__fixup_start(map
);
1723 map__fixup_end(map
);
1729 static int dso__load_guest_kernel_sym(struct dso
*dso
, struct map
*map
,
1730 symbol_filter_t filter
)
1733 const char *kallsyms_filename
= NULL
;
1734 struct machine
*machine
;
1735 char path
[PATH_MAX
];
1738 pr_debug("Guest kernel map hasn't the point to groups\n");
1741 machine
= map
->groups
->machine
;
1743 if (machine__is_default_guest(machine
)) {
1745 * if the user specified a vmlinux filename, use it and only
1746 * it, reporting errors to the user if it cannot be used.
1747 * Or use file guest_kallsyms inputted by user on commandline
1749 if (symbol_conf
.default_guest_vmlinux_name
!= NULL
) {
1750 err
= dso__load_vmlinux(dso
, map
,
1751 symbol_conf
.default_guest_vmlinux_name
,
1756 kallsyms_filename
= symbol_conf
.default_guest_kallsyms
;
1757 if (!kallsyms_filename
)
1760 sprintf(path
, "%s/proc/kallsyms", machine
->root_dir
);
1761 kallsyms_filename
= path
;
1764 err
= dso__load_kallsyms(dso
, kallsyms_filename
, map
, filter
);
1766 pr_debug("Using %s for symbols\n", kallsyms_filename
);
1767 if (err
> 0 && !dso__is_kcore(dso
)) {
1768 dso
->binary_type
= DSO_BINARY_TYPE__GUEST_KALLSYMS
;
1769 machine__mmap_name(machine
, path
, sizeof(path
));
1770 dso__set_long_name(dso
, strdup(path
), true);
1771 map__fixup_start(map
);
1772 map__fixup_end(map
);
1778 static void vmlinux_path__exit(void)
1780 while (--vmlinux_path__nr_entries
>= 0)
1781 zfree(&vmlinux_path
[vmlinux_path__nr_entries
]);
1783 zfree(&vmlinux_path
);
1786 static int vmlinux_path__init(struct perf_session_env
*env
)
1790 char *kernel_version
;
1792 vmlinux_path
= malloc(sizeof(char *) * 6);
1793 if (vmlinux_path
== NULL
)
1796 vmlinux_path
[vmlinux_path__nr_entries
] = strdup("vmlinux");
1797 if (vmlinux_path
[vmlinux_path__nr_entries
] == NULL
)
1799 ++vmlinux_path__nr_entries
;
1800 vmlinux_path
[vmlinux_path__nr_entries
] = strdup("/boot/vmlinux");
1801 if (vmlinux_path
[vmlinux_path__nr_entries
] == NULL
)
1803 ++vmlinux_path__nr_entries
;
1805 /* only try kernel version if no symfs was given */
1806 if (symbol_conf
.symfs
[0] != 0)
1810 kernel_version
= env
->os_release
;
1812 if (uname(&uts
) < 0)
1815 kernel_version
= uts
.release
;
1818 snprintf(bf
, sizeof(bf
), "/boot/vmlinux-%s", kernel_version
);
1819 vmlinux_path
[vmlinux_path__nr_entries
] = strdup(bf
);
1820 if (vmlinux_path
[vmlinux_path__nr_entries
] == NULL
)
1822 ++vmlinux_path__nr_entries
;
1823 snprintf(bf
, sizeof(bf
), "/usr/lib/debug/boot/vmlinux-%s",
1825 vmlinux_path
[vmlinux_path__nr_entries
] = strdup(bf
);
1826 if (vmlinux_path
[vmlinux_path__nr_entries
] == NULL
)
1828 ++vmlinux_path__nr_entries
;
1829 snprintf(bf
, sizeof(bf
), "/lib/modules/%s/build/vmlinux", kernel_version
);
1830 vmlinux_path
[vmlinux_path__nr_entries
] = strdup(bf
);
1831 if (vmlinux_path
[vmlinux_path__nr_entries
] == NULL
)
1833 ++vmlinux_path__nr_entries
;
1834 snprintf(bf
, sizeof(bf
), "/usr/lib/debug/lib/modules/%s/vmlinux",
1836 vmlinux_path
[vmlinux_path__nr_entries
] = strdup(bf
);
1837 if (vmlinux_path
[vmlinux_path__nr_entries
] == NULL
)
1839 ++vmlinux_path__nr_entries
;
1844 vmlinux_path__exit();
1848 int setup_list(struct strlist
**list
, const char *list_str
,
1849 const char *list_name
)
1851 if (list_str
== NULL
)
1854 *list
= strlist__new(true, list_str
);
1856 pr_err("problems parsing %s list\n", list_name
);
1862 static bool symbol__read_kptr_restrict(void)
1866 if (geteuid() != 0) {
1867 FILE *fp
= fopen("/proc/sys/kernel/kptr_restrict", "r");
1871 if (fgets(line
, sizeof(line
), fp
) != NULL
)
1872 value
= atoi(line
) != 0;
1881 int symbol__init(struct perf_session_env
*env
)
1885 if (symbol_conf
.initialized
)
1888 symbol_conf
.priv_size
= PERF_ALIGN(symbol_conf
.priv_size
, sizeof(u64
));
1892 if (symbol_conf
.sort_by_name
)
1893 symbol_conf
.priv_size
+= (sizeof(struct symbol_name_rb_node
) -
1894 sizeof(struct symbol
));
1896 if (symbol_conf
.try_vmlinux_path
&& vmlinux_path__init(env
) < 0)
1899 if (symbol_conf
.field_sep
&& *symbol_conf
.field_sep
== '.') {
1900 pr_err("'.' is the only non valid --field-separator argument\n");
1904 if (setup_list(&symbol_conf
.dso_list
,
1905 symbol_conf
.dso_list_str
, "dso") < 0)
1908 if (setup_list(&symbol_conf
.comm_list
,
1909 symbol_conf
.comm_list_str
, "comm") < 0)
1910 goto out_free_dso_list
;
1912 if (setup_list(&symbol_conf
.sym_list
,
1913 symbol_conf
.sym_list_str
, "symbol") < 0)
1914 goto out_free_comm_list
;
1917 * A path to symbols of "/" is identical to ""
1918 * reset here for simplicity.
1920 symfs
= realpath(symbol_conf
.symfs
, NULL
);
1922 symfs
= symbol_conf
.symfs
;
1923 if (strcmp(symfs
, "/") == 0)
1924 symbol_conf
.symfs
= "";
1925 if (symfs
!= symbol_conf
.symfs
)
1926 free((void *)symfs
);
1928 symbol_conf
.kptr_restrict
= symbol__read_kptr_restrict();
1930 symbol_conf
.initialized
= true;
1934 strlist__delete(symbol_conf
.comm_list
);
1936 strlist__delete(symbol_conf
.dso_list
);
1940 void symbol__exit(void)
1942 if (!symbol_conf
.initialized
)
1944 strlist__delete(symbol_conf
.sym_list
);
1945 strlist__delete(symbol_conf
.dso_list
);
1946 strlist__delete(symbol_conf
.comm_list
);
1947 vmlinux_path__exit();
1948 symbol_conf
.sym_list
= symbol_conf
.dso_list
= symbol_conf
.comm_list
= NULL
;
1949 symbol_conf
.initialized
= false;