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
;
657 int count
= 0, moved
= 0;
658 struct rb_root
*root
= &dso
->symbols
[map
->type
];
659 struct rb_node
*next
= rb_first(root
);
667 pos
= rb_entry(next
, struct symbol
, rb_node
);
668 next
= rb_next(&pos
->rb_node
);
670 module
= strchr(pos
->name
, '\t');
674 curr_map
= map_groups__find(kmaps
, map
->type
, pos
->start
);
676 if (!curr_map
|| (filter
&& filter(curr_map
, pos
))) {
677 rb_erase_init(&pos
->rb_node
, root
);
680 pos
->start
-= curr_map
->start
- curr_map
->pgoff
;
682 pos
->end
-= curr_map
->start
- curr_map
->pgoff
;
683 if (curr_map
->dso
!= map
->dso
) {
684 rb_erase_init(&pos
->rb_node
, root
);
686 &curr_map
->dso
->symbols
[curr_map
->type
],
695 /* Symbols have been adjusted */
696 dso
->adjust_symbols
= 1;
698 return count
+ moved
;
702 * Split the symbols into maps, making sure there are no overlaps, i.e. the
703 * kernel range is broken in several maps, named [kernel].N, as we don't have
704 * the original ELF section names vmlinux have.
706 static int dso__split_kallsyms(struct dso
*dso
, struct map
*map
, u64 delta
,
707 symbol_filter_t filter
)
709 struct map_groups
*kmaps
= map__kmaps(map
);
710 struct machine
*machine
;
711 struct map
*curr_map
= map
;
713 int count
= 0, moved
= 0;
714 struct rb_root
*root
= &dso
->symbols
[map
->type
];
715 struct rb_node
*next
= rb_first(root
);
716 int kernel_range
= 0;
721 machine
= kmaps
->machine
;
726 pos
= rb_entry(next
, struct symbol
, rb_node
);
727 next
= rb_next(&pos
->rb_node
);
729 module
= strchr(pos
->name
, '\t');
731 if (!symbol_conf
.use_modules
)
736 if (strcmp(curr_map
->dso
->short_name
, module
)) {
737 if (curr_map
!= map
&&
738 dso
->kernel
== DSO_TYPE_GUEST_KERNEL
&&
739 machine__is_default_guest(machine
)) {
741 * We assume all symbols of a module are
742 * continuous in * kallsyms, so curr_map
743 * points to a module and all its
744 * symbols are in its kmap. Mark it as
747 dso__set_loaded(curr_map
->dso
,
751 curr_map
= map_groups__find_by_name(kmaps
,
753 if (curr_map
== NULL
) {
754 pr_debug("%s/proc/{kallsyms,modules} "
755 "inconsistency while looking "
756 "for \"%s\" module!\n",
757 machine
->root_dir
, module
);
762 if (curr_map
->dso
->loaded
&&
763 !machine__is_default_guest(machine
))
767 * So that we look just like we get from .ko files,
768 * i.e. not prelinked, relative to map->start.
770 pos
->start
= curr_map
->map_ip(curr_map
, pos
->start
);
771 pos
->end
= curr_map
->map_ip(curr_map
, pos
->end
);
772 } else if (curr_map
!= map
) {
773 char dso_name
[PATH_MAX
];
777 /* Kernel was relocated at boot time */
787 if (dso
->kernel
== DSO_TYPE_GUEST_KERNEL
)
788 snprintf(dso_name
, sizeof(dso_name
),
792 snprintf(dso_name
, sizeof(dso_name
),
796 ndso
= dso__new(dso_name
);
800 ndso
->kernel
= dso
->kernel
;
802 curr_map
= map__new2(pos
->start
, ndso
, map
->type
);
803 if (curr_map
== NULL
) {
808 curr_map
->map_ip
= curr_map
->unmap_ip
= identity__map_ip
;
809 map_groups__insert(kmaps
, curr_map
);
812 /* Kernel was relocated at boot time */
817 if (filter
&& filter(curr_map
, pos
)) {
818 discard_symbol
: rb_erase(&pos
->rb_node
, root
);
821 if (curr_map
!= map
) {
822 rb_erase(&pos
->rb_node
, root
);
823 symbols__insert(&curr_map
->dso
->symbols
[curr_map
->type
], pos
);
830 if (curr_map
!= map
&&
831 dso
->kernel
== DSO_TYPE_GUEST_KERNEL
&&
832 machine__is_default_guest(kmaps
->machine
)) {
833 dso__set_loaded(curr_map
->dso
, curr_map
->type
);
836 return count
+ moved
;
839 bool symbol__restricted_filename(const char *filename
,
840 const char *restricted_filename
)
842 bool restricted
= false;
844 if (symbol_conf
.kptr_restrict
) {
845 char *r
= realpath(filename
, NULL
);
848 restricted
= strcmp(r
, restricted_filename
) == 0;
858 struct rb_node rb_node
;
863 static void add_module(struct module_info
*mi
, struct rb_root
*modules
)
865 struct rb_node
**p
= &modules
->rb_node
;
866 struct rb_node
*parent
= NULL
;
867 struct module_info
*m
;
871 m
= rb_entry(parent
, struct module_info
, rb_node
);
872 if (strcmp(mi
->name
, m
->name
) < 0)
877 rb_link_node(&mi
->rb_node
, parent
, p
);
878 rb_insert_color(&mi
->rb_node
, modules
);
881 static void delete_modules(struct rb_root
*modules
)
883 struct module_info
*mi
;
884 struct rb_node
*next
= rb_first(modules
);
887 mi
= rb_entry(next
, struct module_info
, rb_node
);
888 next
= rb_next(&mi
->rb_node
);
889 rb_erase(&mi
->rb_node
, modules
);
895 static struct module_info
*find_module(const char *name
,
896 struct rb_root
*modules
)
898 struct rb_node
*n
= modules
->rb_node
;
901 struct module_info
*m
;
904 m
= rb_entry(n
, struct module_info
, rb_node
);
905 cmp
= strcmp(name
, m
->name
);
917 static int __read_proc_modules(void *arg
, const char *name
, u64 start
)
919 struct rb_root
*modules
= arg
;
920 struct module_info
*mi
;
922 mi
= zalloc(sizeof(struct module_info
));
926 mi
->name
= strdup(name
);
934 add_module(mi
, modules
);
939 static int read_proc_modules(const char *filename
, struct rb_root
*modules
)
941 if (symbol__restricted_filename(filename
, "/proc/modules"))
944 if (modules__parse(filename
, modules
, __read_proc_modules
)) {
945 delete_modules(modules
);
952 int compare_proc_modules(const char *from
, const char *to
)
954 struct rb_root from_modules
= RB_ROOT
;
955 struct rb_root to_modules
= RB_ROOT
;
956 struct rb_node
*from_node
, *to_node
;
957 struct module_info
*from_m
, *to_m
;
960 if (read_proc_modules(from
, &from_modules
))
963 if (read_proc_modules(to
, &to_modules
))
964 goto out_delete_from
;
966 from_node
= rb_first(&from_modules
);
967 to_node
= rb_first(&to_modules
);
972 from_m
= rb_entry(from_node
, struct module_info
, rb_node
);
973 to_m
= rb_entry(to_node
, struct module_info
, rb_node
);
975 if (from_m
->start
!= to_m
->start
||
976 strcmp(from_m
->name
, to_m
->name
))
979 from_node
= rb_next(from_node
);
980 to_node
= rb_next(to_node
);
983 if (!from_node
&& !to_node
)
986 delete_modules(&to_modules
);
988 delete_modules(&from_modules
);
993 static int do_validate_kcore_modules(const char *filename
, struct map
*map
,
994 struct map_groups
*kmaps
)
996 struct rb_root modules
= RB_ROOT
;
1000 err
= read_proc_modules(filename
, &modules
);
1004 old_map
= map_groups__first(kmaps
, map
->type
);
1006 struct map
*next
= map_groups__next(old_map
);
1007 struct module_info
*mi
;
1009 if (old_map
== map
|| old_map
->start
== map
->start
) {
1010 /* The kernel map */
1015 /* Module must be in memory at the same address */
1016 mi
= find_module(old_map
->dso
->short_name
, &modules
);
1017 if (!mi
|| mi
->start
!= old_map
->start
) {
1025 delete_modules(&modules
);
1030 * If kallsyms is referenced by name then we look for filename in the same
1033 static bool filename_from_kallsyms_filename(char *filename
,
1034 const char *base_name
,
1035 const char *kallsyms_filename
)
1039 strcpy(filename
, kallsyms_filename
);
1040 name
= strrchr(filename
, '/');
1046 if (!strcmp(name
, "kallsyms")) {
1047 strcpy(name
, base_name
);
1054 static int validate_kcore_modules(const char *kallsyms_filename
,
1057 struct map_groups
*kmaps
= map__kmaps(map
);
1058 char modules_filename
[PATH_MAX
];
1063 if (!filename_from_kallsyms_filename(modules_filename
, "modules",
1067 if (do_validate_kcore_modules(modules_filename
, map
, kmaps
))
1073 static int validate_kcore_addresses(const char *kallsyms_filename
,
1076 struct kmap
*kmap
= map__kmap(map
);
1081 if (kmap
->ref_reloc_sym
&& kmap
->ref_reloc_sym
->name
) {
1084 start
= kallsyms__get_function_start(kallsyms_filename
,
1085 kmap
->ref_reloc_sym
->name
);
1086 if (start
!= kmap
->ref_reloc_sym
->addr
)
1090 return validate_kcore_modules(kallsyms_filename
, map
);
1093 struct kcore_mapfn_data
{
1096 struct list_head maps
;
1099 static int kcore_mapfn(u64 start
, u64 len
, u64 pgoff
, void *data
)
1101 struct kcore_mapfn_data
*md
= data
;
1104 map
= map__new2(start
, md
->dso
, md
->type
);
1108 map
->end
= map
->start
+ len
;
1111 list_add(&map
->node
, &md
->maps
);
1116 static int dso__load_kcore(struct dso
*dso
, struct map
*map
,
1117 const char *kallsyms_filename
)
1119 struct map_groups
*kmaps
= map__kmaps(map
);
1120 struct machine
*machine
;
1121 struct kcore_mapfn_data md
;
1122 struct map
*old_map
, *new_map
, *replacement_map
= NULL
;
1125 char kcore_filename
[PATH_MAX
];
1131 machine
= kmaps
->machine
;
1133 /* This function requires that the map is the kernel map */
1134 if (map
!= machine
->vmlinux_maps
[map
->type
])
1137 if (!filename_from_kallsyms_filename(kcore_filename
, "kcore",
1141 /* Modules and kernel must be present at their original addresses */
1142 if (validate_kcore_addresses(kallsyms_filename
, map
))
1146 md
.type
= map
->type
;
1147 INIT_LIST_HEAD(&md
.maps
);
1149 fd
= open(kcore_filename
, O_RDONLY
);
1151 pr_debug("Failed to open %s. Note /proc/kcore requires CAP_SYS_RAWIO capability to access.\n",
1156 /* Read new maps into temporary lists */
1157 err
= file__read_maps(fd
, md
.type
== MAP__FUNCTION
, kcore_mapfn
, &md
,
1161 dso
->is_64_bit
= is_64_bit
;
1163 if (list_empty(&md
.maps
)) {
1168 /* Remove old maps */
1169 old_map
= map_groups__first(kmaps
, map
->type
);
1171 struct map
*next
= map_groups__next(old_map
);
1174 map_groups__remove(kmaps
, old_map
);
1178 /* Find the kernel map using the first symbol */
1179 sym
= dso__first_symbol(dso
, map
->type
);
1180 list_for_each_entry(new_map
, &md
.maps
, node
) {
1181 if (sym
&& sym
->start
>= new_map
->start
&&
1182 sym
->start
< new_map
->end
) {
1183 replacement_map
= new_map
;
1188 if (!replacement_map
)
1189 replacement_map
= list_entry(md
.maps
.next
, struct map
, node
);
1192 while (!list_empty(&md
.maps
)) {
1193 new_map
= list_entry(md
.maps
.next
, struct map
, node
);
1194 list_del_init(&new_map
->node
);
1195 if (new_map
== replacement_map
) {
1196 map
->start
= new_map
->start
;
1197 map
->end
= new_map
->end
;
1198 map
->pgoff
= new_map
->pgoff
;
1199 map
->map_ip
= new_map
->map_ip
;
1200 map
->unmap_ip
= new_map
->unmap_ip
;
1201 /* Ensure maps are correctly ordered */
1203 map_groups__remove(kmaps
, map
);
1204 map_groups__insert(kmaps
, map
);
1207 map_groups__insert(kmaps
, new_map
);
1214 * Set the data type and long name so that kcore can be read via
1215 * dso__data_read_addr().
1217 if (dso
->kernel
== DSO_TYPE_GUEST_KERNEL
)
1218 dso
->binary_type
= DSO_BINARY_TYPE__GUEST_KCORE
;
1220 dso
->binary_type
= DSO_BINARY_TYPE__KCORE
;
1221 dso__set_long_name(dso
, strdup(kcore_filename
), true);
1225 if (map
->type
== MAP__FUNCTION
)
1226 pr_debug("Using %s for kernel object code\n", kcore_filename
);
1228 pr_debug("Using %s for kernel data\n", kcore_filename
);
1233 while (!list_empty(&md
.maps
)) {
1234 map
= list_entry(md
.maps
.next
, struct map
, node
);
1235 list_del_init(&map
->node
);
1243 * If the kernel is relocated at boot time, kallsyms won't match. Compute the
1244 * delta based on the relocation reference symbol.
1246 static int kallsyms__delta(struct map
*map
, const char *filename
, u64
*delta
)
1248 struct kmap
*kmap
= map__kmap(map
);
1254 if (!kmap
->ref_reloc_sym
|| !kmap
->ref_reloc_sym
->name
)
1257 addr
= kallsyms__get_function_start(filename
,
1258 kmap
->ref_reloc_sym
->name
);
1262 *delta
= addr
- kmap
->ref_reloc_sym
->addr
;
1266 int dso__load_kallsyms(struct dso
*dso
, const char *filename
,
1267 struct map
*map
, symbol_filter_t filter
)
1271 if (symbol__restricted_filename(filename
, "/proc/kallsyms"))
1274 if (dso__load_all_kallsyms(dso
, filename
, map
) < 0)
1277 if (kallsyms__delta(map
, filename
, &delta
))
1280 symbols__fixup_duplicate(&dso
->symbols
[map
->type
]);
1281 symbols__fixup_end(&dso
->symbols
[map
->type
]);
1283 if (dso
->kernel
== DSO_TYPE_GUEST_KERNEL
)
1284 dso
->symtab_type
= DSO_BINARY_TYPE__GUEST_KALLSYMS
;
1286 dso
->symtab_type
= DSO_BINARY_TYPE__KALLSYMS
;
1288 if (!dso__load_kcore(dso
, map
, filename
))
1289 return dso__split_kallsyms_for_kcore(dso
, map
, filter
);
1291 return dso__split_kallsyms(dso
, map
, delta
, filter
);
1294 static int dso__load_perf_map(struct dso
*dso
, struct map
*map
,
1295 symbol_filter_t filter
)
1302 file
= fopen(dso
->long_name
, "r");
1306 while (!feof(file
)) {
1311 line_len
= getline(&line
, &n
, file
);
1318 line
[--line_len
] = '\0'; /* \n */
1320 len
= hex2u64(line
, &start
);
1323 if (len
+ 2 >= line_len
)
1326 len
+= hex2u64(line
+ len
, &size
);
1329 if (len
+ 2 >= line_len
)
1332 sym
= symbol__new(start
, size
, STB_GLOBAL
, line
+ len
);
1335 goto out_delete_line
;
1337 if (filter
&& filter(map
, sym
))
1338 symbol__delete(sym
);
1340 symbols__insert(&dso
->symbols
[map
->type
], sym
);
1356 static bool dso__is_compatible_symtab_type(struct dso
*dso
, bool kmod
,
1357 enum dso_binary_type type
)
1360 case DSO_BINARY_TYPE__JAVA_JIT
:
1361 case DSO_BINARY_TYPE__DEBUGLINK
:
1362 case DSO_BINARY_TYPE__SYSTEM_PATH_DSO
:
1363 case DSO_BINARY_TYPE__FEDORA_DEBUGINFO
:
1364 case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO
:
1365 case DSO_BINARY_TYPE__BUILDID_DEBUGINFO
:
1366 case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO
:
1367 return !kmod
&& dso
->kernel
== DSO_TYPE_USER
;
1369 case DSO_BINARY_TYPE__KALLSYMS
:
1370 case DSO_BINARY_TYPE__VMLINUX
:
1371 case DSO_BINARY_TYPE__KCORE
:
1372 return dso
->kernel
== DSO_TYPE_KERNEL
;
1374 case DSO_BINARY_TYPE__GUEST_KALLSYMS
:
1375 case DSO_BINARY_TYPE__GUEST_VMLINUX
:
1376 case DSO_BINARY_TYPE__GUEST_KCORE
:
1377 return dso
->kernel
== DSO_TYPE_GUEST_KERNEL
;
1379 case DSO_BINARY_TYPE__GUEST_KMODULE
:
1380 case DSO_BINARY_TYPE__GUEST_KMODULE_COMP
:
1381 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE
:
1382 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP
:
1384 * kernel modules know their symtab type - it's set when
1385 * creating a module dso in machine__findnew_module_map().
1387 return kmod
&& dso
->symtab_type
== type
;
1389 case DSO_BINARY_TYPE__BUILD_ID_CACHE
:
1392 case DSO_BINARY_TYPE__NOT_FOUND
:
1398 int dso__load(struct dso
*dso
, struct map
*map
, symbol_filter_t filter
)
1403 struct machine
*machine
;
1404 char *root_dir
= (char *) "";
1406 struct symsrc ss_
[2];
1407 struct symsrc
*syms_ss
= NULL
, *runtime_ss
= NULL
;
1409 unsigned char build_id
[BUILD_ID_SIZE
];
1411 pthread_mutex_lock(&dso
->lock
);
1413 /* check again under the dso->lock */
1414 if (dso__loaded(dso
, map
->type
)) {
1420 if (dso
->kernel
== DSO_TYPE_KERNEL
)
1421 ret
= dso__load_kernel_sym(dso
, map
, filter
);
1422 else if (dso
->kernel
== DSO_TYPE_GUEST_KERNEL
)
1423 ret
= dso__load_guest_kernel_sym(dso
, map
, filter
);
1428 if (map
->groups
&& map
->groups
->machine
)
1429 machine
= map
->groups
->machine
;
1433 dso
->adjust_symbols
= 0;
1435 if (strncmp(dso
->name
, "/tmp/perf-", 10) == 0) {
1438 if (lstat(dso
->name
, &st
) < 0)
1441 if (st
.st_uid
&& (st
.st_uid
!= geteuid())) {
1442 pr_warning("File %s not owned by current user or root, "
1443 "ignoring it.\n", dso
->name
);
1447 ret
= dso__load_perf_map(dso
, map
, filter
);
1448 dso
->symtab_type
= ret
> 0 ? DSO_BINARY_TYPE__JAVA_JIT
:
1449 DSO_BINARY_TYPE__NOT_FOUND
;
1454 root_dir
= machine
->root_dir
;
1456 name
= malloc(PATH_MAX
);
1460 kmod
= dso
->symtab_type
== DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE
||
1461 dso
->symtab_type
== DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP
||
1462 dso
->symtab_type
== DSO_BINARY_TYPE__GUEST_KMODULE
||
1463 dso
->symtab_type
== DSO_BINARY_TYPE__GUEST_KMODULE_COMP
;
1467 * Read the build id if possible. This is required for
1468 * DSO_BINARY_TYPE__BUILDID_DEBUGINFO to work
1470 if (filename__read_build_id(dso
->name
, build_id
, BUILD_ID_SIZE
) > 0)
1471 dso__set_build_id(dso
, build_id
);
1474 * Iterate over candidate debug images.
1475 * Keep track of "interesting" ones (those which have a symtab, dynsym,
1476 * and/or opd section) for processing.
1478 for (i
= 0; i
< DSO_BINARY_TYPE__SYMTAB_CNT
; i
++) {
1479 struct symsrc
*ss
= &ss_
[ss_pos
];
1480 bool next_slot
= false;
1482 enum dso_binary_type symtab_type
= binary_type_symtab
[i
];
1484 if (!dso__is_compatible_symtab_type(dso
, kmod
, symtab_type
))
1487 if (dso__read_binary_type_filename(dso
, symtab_type
,
1488 root_dir
, name
, PATH_MAX
))
1491 /* Name is now the name of the next image to try */
1492 if (symsrc__init(ss
, dso
, name
, symtab_type
) < 0)
1495 if (!syms_ss
&& symsrc__has_symtab(ss
)) {
1498 if (!dso
->symsrc_filename
)
1499 dso
->symsrc_filename
= strdup(name
);
1502 if (!runtime_ss
&& symsrc__possibly_runtime(ss
)) {
1510 if (syms_ss
&& runtime_ss
)
1513 symsrc__destroy(ss
);
1518 if (!runtime_ss
&& !syms_ss
)
1521 if (runtime_ss
&& !syms_ss
) {
1522 syms_ss
= runtime_ss
;
1525 /* We'll have to hope for the best */
1526 if (!runtime_ss
&& syms_ss
)
1527 runtime_ss
= syms_ss
;
1530 ret
= dso__load_sym(dso
, map
, syms_ss
, runtime_ss
, filter
, kmod
);
1537 nr_plt
= dso__synthesize_plt_symbols(dso
, runtime_ss
, map
, filter
);
1542 for (; ss_pos
> 0; ss_pos
--)
1543 symsrc__destroy(&ss_
[ss_pos
- 1]);
1546 if (ret
< 0 && strstr(dso
->name
, " (deleted)") != NULL
)
1549 dso__set_loaded(dso
, map
->type
);
1550 pthread_mutex_unlock(&dso
->lock
);
1555 struct map
*map_groups__find_by_name(struct map_groups
*mg
,
1556 enum map_type type
, const char *name
)
1558 struct maps
*maps
= &mg
->maps
[type
];
1561 pthread_rwlock_rdlock(&maps
->lock
);
1563 for (map
= maps__first(maps
); map
; map
= map__next(map
)) {
1564 if (map
->dso
&& strcmp(map
->dso
->short_name
, name
) == 0)
1571 pthread_rwlock_unlock(&maps
->lock
);
1575 int dso__load_vmlinux(struct dso
*dso
, struct map
*map
,
1576 const char *vmlinux
, bool vmlinux_allocated
,
1577 symbol_filter_t filter
)
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
, filter
, 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
,
1614 symbol_filter_t filter
)
1617 char *filename
= NULL
;
1619 pr_debug("Looking at the vmlinux_path (%d entries long)\n",
1620 vmlinux_path__nr_entries
+ 1);
1622 for (i
= 0; i
< vmlinux_path__nr_entries
; ++i
) {
1623 err
= dso__load_vmlinux(dso
, map
, vmlinux_path
[i
], false, filter
);
1628 if (!symbol_conf
.ignore_vmlinux_buildid
)
1629 filename
= dso__build_id_filename(dso
, NULL
, 0);
1630 if (filename
!= NULL
) {
1631 err
= dso__load_vmlinux(dso
, map
, filename
, true, filter
);
1640 static int find_matching_kcore(struct map
*map
, char *dir
, size_t dir_sz
)
1642 char kallsyms_filename
[PATH_MAX
];
1643 struct dirent
*dent
;
1655 if (dent
->d_type
!= DT_DIR
)
1657 scnprintf(kallsyms_filename
, sizeof(kallsyms_filename
),
1658 "%s/%s/kallsyms", dir
, dent
->d_name
);
1659 if (!validate_kcore_addresses(kallsyms_filename
, map
)) {
1660 strlcpy(dir
, kallsyms_filename
, dir_sz
);
1671 static char *dso__find_kallsyms(struct dso
*dso
, struct map
*map
)
1673 u8 host_build_id
[BUILD_ID_SIZE
];
1674 char sbuild_id
[BUILD_ID_SIZE
* 2 + 1];
1675 bool is_host
= false;
1676 char path
[PATH_MAX
];
1678 if (!dso
->has_build_id
) {
1680 * Last resort, if we don't have a build-id and couldn't find
1681 * any vmlinux file, try the running kernel kallsyms table.
1686 if (sysfs__read_build_id("/sys/kernel/notes", host_build_id
,
1687 sizeof(host_build_id
)) == 0)
1688 is_host
= dso__build_id_equal(dso
, host_build_id
);
1690 build_id__sprintf(dso
->build_id
, sizeof(dso
->build_id
), sbuild_id
);
1692 scnprintf(path
, sizeof(path
), "%s/[kernel.kcore]/%s", buildid_dir
,
1695 /* Use /proc/kallsyms if possible */
1700 /* If no cached kcore go with /proc/kallsyms */
1707 * Do not check the build-id cache, until we know we cannot use
1710 fd
= open("/proc/kcore", O_RDONLY
);
1713 /* If module maps match go with /proc/kallsyms */
1714 if (!validate_kcore_addresses("/proc/kallsyms", map
))
1718 /* Find kallsyms in build-id cache with kcore */
1719 if (!find_matching_kcore(map
, path
, sizeof(path
)))
1720 return strdup(path
);
1725 /* Find kallsyms in build-id cache with kcore */
1726 if (!find_matching_kcore(map
, path
, sizeof(path
)))
1727 return strdup(path
);
1729 scnprintf(path
, sizeof(path
), "%s/[kernel.kallsyms]/%s",
1730 buildid_dir
, sbuild_id
);
1732 if (access(path
, F_OK
)) {
1733 pr_err("No kallsyms or vmlinux with build-id %s was found\n",
1738 return strdup(path
);
1741 return strdup("/proc/kallsyms");
1744 static int dso__load_kernel_sym(struct dso
*dso
, struct map
*map
,
1745 symbol_filter_t filter
)
1748 const char *kallsyms_filename
= NULL
;
1749 char *kallsyms_allocated_filename
= NULL
;
1751 * Step 1: if the user specified a kallsyms or vmlinux filename, use
1752 * it and only it, reporting errors to the user if it cannot be used.
1754 * For instance, try to analyse an ARM perf.data file _without_ a
1755 * build-id, or if the user specifies the wrong path to the right
1756 * vmlinux file, obviously we can't fallback to another vmlinux (a
1757 * x86_86 one, on the machine where analysis is being performed, say),
1758 * or worse, /proc/kallsyms.
1760 * If the specified file _has_ a build-id and there is a build-id
1761 * section in the perf.data file, we will still do the expected
1762 * validation in dso__load_vmlinux and will bail out if they don't
1765 if (symbol_conf
.kallsyms_name
!= NULL
) {
1766 kallsyms_filename
= symbol_conf
.kallsyms_name
;
1770 if (!symbol_conf
.ignore_vmlinux
&& symbol_conf
.vmlinux_name
!= NULL
) {
1771 return dso__load_vmlinux(dso
, map
, symbol_conf
.vmlinux_name
,
1775 if (!symbol_conf
.ignore_vmlinux
&& vmlinux_path
!= NULL
) {
1776 err
= dso__load_vmlinux_path(dso
, map
, filter
);
1781 /* do not try local files if a symfs was given */
1782 if (symbol_conf
.symfs
[0] != 0)
1785 kallsyms_allocated_filename
= dso__find_kallsyms(dso
, map
);
1786 if (!kallsyms_allocated_filename
)
1789 kallsyms_filename
= kallsyms_allocated_filename
;
1792 err
= dso__load_kallsyms(dso
, kallsyms_filename
, map
, filter
);
1794 pr_debug("Using %s for symbols\n", kallsyms_filename
);
1795 free(kallsyms_allocated_filename
);
1797 if (err
> 0 && !dso__is_kcore(dso
)) {
1798 dso
->binary_type
= DSO_BINARY_TYPE__KALLSYMS
;
1799 dso__set_long_name(dso
, "[kernel.kallsyms]", false);
1800 map__fixup_start(map
);
1801 map__fixup_end(map
);
1807 static int dso__load_guest_kernel_sym(struct dso
*dso
, struct map
*map
,
1808 symbol_filter_t filter
)
1811 const char *kallsyms_filename
= NULL
;
1812 struct machine
*machine
;
1813 char path
[PATH_MAX
];
1816 pr_debug("Guest kernel map hasn't the point to groups\n");
1819 machine
= map
->groups
->machine
;
1821 if (machine__is_default_guest(machine
)) {
1823 * if the user specified a vmlinux filename, use it and only
1824 * it, reporting errors to the user if it cannot be used.
1825 * Or use file guest_kallsyms inputted by user on commandline
1827 if (symbol_conf
.default_guest_vmlinux_name
!= NULL
) {
1828 err
= dso__load_vmlinux(dso
, map
,
1829 symbol_conf
.default_guest_vmlinux_name
,
1834 kallsyms_filename
= symbol_conf
.default_guest_kallsyms
;
1835 if (!kallsyms_filename
)
1838 sprintf(path
, "%s/proc/kallsyms", machine
->root_dir
);
1839 kallsyms_filename
= path
;
1842 err
= dso__load_kallsyms(dso
, kallsyms_filename
, map
, filter
);
1844 pr_debug("Using %s for symbols\n", kallsyms_filename
);
1845 if (err
> 0 && !dso__is_kcore(dso
)) {
1846 dso
->binary_type
= DSO_BINARY_TYPE__GUEST_KALLSYMS
;
1847 machine__mmap_name(machine
, path
, sizeof(path
));
1848 dso__set_long_name(dso
, strdup(path
), true);
1849 map__fixup_start(map
);
1850 map__fixup_end(map
);
1856 static void vmlinux_path__exit(void)
1858 while (--vmlinux_path__nr_entries
>= 0)
1859 zfree(&vmlinux_path
[vmlinux_path__nr_entries
]);
1860 vmlinux_path__nr_entries
= 0;
1862 zfree(&vmlinux_path
);
1865 static int vmlinux_path__init(struct perf_env
*env
)
1869 char *kernel_version
;
1871 vmlinux_path
= malloc(sizeof(char *) * 6);
1872 if (vmlinux_path
== NULL
)
1875 vmlinux_path
[vmlinux_path__nr_entries
] = strdup("vmlinux");
1876 if (vmlinux_path
[vmlinux_path__nr_entries
] == NULL
)
1878 ++vmlinux_path__nr_entries
;
1879 vmlinux_path
[vmlinux_path__nr_entries
] = strdup("/boot/vmlinux");
1880 if (vmlinux_path
[vmlinux_path__nr_entries
] == NULL
)
1882 ++vmlinux_path__nr_entries
;
1884 /* only try kernel version if no symfs was given */
1885 if (symbol_conf
.symfs
[0] != 0)
1889 kernel_version
= env
->os_release
;
1891 if (uname(&uts
) < 0)
1894 kernel_version
= uts
.release
;
1897 snprintf(bf
, sizeof(bf
), "/boot/vmlinux-%s", kernel_version
);
1898 vmlinux_path
[vmlinux_path__nr_entries
] = strdup(bf
);
1899 if (vmlinux_path
[vmlinux_path__nr_entries
] == NULL
)
1901 ++vmlinux_path__nr_entries
;
1902 snprintf(bf
, sizeof(bf
), "/usr/lib/debug/boot/vmlinux-%s",
1904 vmlinux_path
[vmlinux_path__nr_entries
] = strdup(bf
);
1905 if (vmlinux_path
[vmlinux_path__nr_entries
] == NULL
)
1907 ++vmlinux_path__nr_entries
;
1908 snprintf(bf
, sizeof(bf
), "/lib/modules/%s/build/vmlinux", kernel_version
);
1909 vmlinux_path
[vmlinux_path__nr_entries
] = strdup(bf
);
1910 if (vmlinux_path
[vmlinux_path__nr_entries
] == NULL
)
1912 ++vmlinux_path__nr_entries
;
1913 snprintf(bf
, sizeof(bf
), "/usr/lib/debug/lib/modules/%s/vmlinux",
1915 vmlinux_path
[vmlinux_path__nr_entries
] = strdup(bf
);
1916 if (vmlinux_path
[vmlinux_path__nr_entries
] == NULL
)
1918 ++vmlinux_path__nr_entries
;
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)
1961 if (geteuid() != 0) {
1962 FILE *fp
= fopen("/proc/sys/kernel/kptr_restrict", "r");
1966 if (fgets(line
, sizeof(line
), fp
) != NULL
)
1967 value
= atoi(line
) != 0;
1976 int symbol__init(struct perf_env
*env
)
1980 if (symbol_conf
.initialized
)
1983 symbol_conf
.priv_size
= PERF_ALIGN(symbol_conf
.priv_size
, sizeof(u64
));
1987 if (symbol_conf
.sort_by_name
)
1988 symbol_conf
.priv_size
+= (sizeof(struct symbol_name_rb_node
) -
1989 sizeof(struct symbol
));
1991 if (symbol_conf
.try_vmlinux_path
&& vmlinux_path__init(env
) < 0)
1994 if (symbol_conf
.field_sep
&& *symbol_conf
.field_sep
== '.') {
1995 pr_err("'.' is the only non valid --field-separator argument\n");
1999 if (setup_list(&symbol_conf
.dso_list
,
2000 symbol_conf
.dso_list_str
, "dso") < 0)
2003 if (setup_list(&symbol_conf
.comm_list
,
2004 symbol_conf
.comm_list_str
, "comm") < 0)
2005 goto out_free_dso_list
;
2007 if (setup_intlist(&symbol_conf
.pid_list
,
2008 symbol_conf
.pid_list_str
, "pid") < 0)
2009 goto out_free_comm_list
;
2011 if (setup_intlist(&symbol_conf
.tid_list
,
2012 symbol_conf
.tid_list_str
, "tid") < 0)
2013 goto out_free_pid_list
;
2015 if (setup_list(&symbol_conf
.sym_list
,
2016 symbol_conf
.sym_list_str
, "symbol") < 0)
2017 goto out_free_tid_list
;
2020 * A path to symbols of "/" is identical to ""
2021 * reset here for simplicity.
2023 symfs
= realpath(symbol_conf
.symfs
, NULL
);
2025 symfs
= symbol_conf
.symfs
;
2026 if (strcmp(symfs
, "/") == 0)
2027 symbol_conf
.symfs
= "";
2028 if (symfs
!= symbol_conf
.symfs
)
2029 free((void *)symfs
);
2031 symbol_conf
.kptr_restrict
= symbol__read_kptr_restrict();
2033 symbol_conf
.initialized
= true;
2037 intlist__delete(symbol_conf
.tid_list
);
2039 intlist__delete(symbol_conf
.pid_list
);
2041 strlist__delete(symbol_conf
.comm_list
);
2043 strlist__delete(symbol_conf
.dso_list
);
2047 void symbol__exit(void)
2049 if (!symbol_conf
.initialized
)
2051 strlist__delete(symbol_conf
.sym_list
);
2052 strlist__delete(symbol_conf
.dso_list
);
2053 strlist__delete(symbol_conf
.comm_list
);
2054 intlist__delete(symbol_conf
.tid_list
);
2055 intlist__delete(symbol_conf
.pid_list
);
2056 vmlinux_path__exit();
2057 symbol_conf
.sym_list
= symbol_conf
.dso_list
= symbol_conf
.comm_list
= NULL
;
2058 symbol_conf
.initialized
= false;