17 #include <linux/string.h>
19 static void __maps__insert(struct maps
*maps
, struct map
*map
);
21 const char *map_type__name
[MAP__NR_TYPES
] = {
22 [MAP__FUNCTION
] = "Functions",
23 [MAP__VARIABLE
] = "Variables",
26 static inline int is_anon_memory(const char *filename
)
28 return !strcmp(filename
, "//anon") ||
29 !strncmp(filename
, "/dev/zero", sizeof("/dev/zero") - 1) ||
30 !strncmp(filename
, "/anon_hugepage", sizeof("/anon_hugepage") - 1);
33 static inline int is_no_dso_memory(const char *filename
)
35 return !strncmp(filename
, "[stack", 6) ||
36 !strncmp(filename
, "/SYSV",5) ||
37 !strcmp(filename
, "[heap]");
40 static inline int is_android_lib(const char *filename
)
42 return !strncmp(filename
, "/data/app-lib", 13) ||
43 !strncmp(filename
, "/system/lib", 11);
46 static inline bool replace_android_lib(const char *filename
, char *newfilename
)
50 size_t app_abi_length
, new_length
;
51 size_t lib_length
= 0;
53 libname
= strrchr(filename
, '/');
55 lib_length
= strlen(libname
);
57 app_abi
= getenv("APP_ABI");
61 app_abi_length
= strlen(app_abi
);
63 if (!strncmp(filename
, "/data/app-lib", 13)) {
69 new_length
= 7 + app_abi_length
+ lib_length
;
71 apk_path
= getenv("APK_PATH");
73 new_length
+= strlen(apk_path
) + 1;
74 if (new_length
> PATH_MAX
)
76 snprintf(newfilename
, new_length
,
77 "%s/libs/%s/%s", apk_path
, app_abi
, libname
);
79 if (new_length
> PATH_MAX
)
81 snprintf(newfilename
, new_length
,
82 "libs/%s/%s", app_abi
, libname
);
87 if (!strncmp(filename
, "/system/lib/", 11)) {
93 ndk
= getenv("NDK_ROOT");
94 app
= getenv("APP_PLATFORM");
99 ndk_length
= strlen(ndk
);
100 app_length
= strlen(app
);
102 if (!(ndk_length
&& app_length
&& app_abi_length
))
105 arch
= !strncmp(app_abi
, "arm", 3) ? "arm" :
106 !strncmp(app_abi
, "mips", 4) ? "mips" :
107 !strncmp(app_abi
, "x86", 3) ? "x86" : NULL
;
112 new_length
= 27 + ndk_length
+
113 app_length
+ lib_length
116 if (new_length
> PATH_MAX
)
118 snprintf(newfilename
, new_length
,
119 "%s/platforms/%s/arch-%s/usr/lib/%s",
120 ndk
, app
, arch
, libname
);
127 void map__init(struct map
*map
, enum map_type type
,
128 u64 start
, u64 end
, u64 pgoff
, struct dso
*dso
)
135 map
->dso
= dso__get(dso
);
136 map
->map_ip
= map__map_ip
;
137 map
->unmap_ip
= map__unmap_ip
;
138 RB_CLEAR_NODE(&map
->rb_node
);
140 map
->erange_warned
= false;
141 atomic_set(&map
->refcnt
, 1);
144 struct map
*map__new(struct machine
*machine
, u64 start
, u64 len
,
145 u64 pgoff
, u32 pid
, u32 d_maj
, u32 d_min
, u64 ino
,
146 u64 ino_gen
, u32 prot
, u32 flags
, char *filename
,
147 enum map_type type
, struct thread
*thread
)
149 struct map
*map
= malloc(sizeof(*map
));
152 char newfilename
[PATH_MAX
];
154 int anon
, no_dso
, vdso
, android
;
156 android
= is_android_lib(filename
);
157 anon
= is_anon_memory(filename
);
158 vdso
= is_vdso_map(filename
);
159 no_dso
= is_no_dso_memory(filename
);
164 map
->ino_generation
= ino_gen
;
168 if ((anon
|| no_dso
) && type
== MAP__FUNCTION
) {
169 snprintf(newfilename
, sizeof(newfilename
), "/tmp/perf-%d.map", pid
);
170 filename
= newfilename
;
174 if (replace_android_lib(filename
, newfilename
))
175 filename
= newfilename
;
180 dso
= machine__findnew_vdso(machine
, thread
);
182 dso
= machine__findnew_dso(machine
, filename
);
187 map__init(map
, type
, start
, start
+ len
, pgoff
, dso
);
189 if (anon
|| no_dso
) {
190 map
->map_ip
= map
->unmap_ip
= identity__map_ip
;
193 * Set memory without DSO as loaded. All map__find_*
194 * functions still return NULL, and we avoid the
195 * unnecessary map__load warning.
197 if (type
!= MAP__FUNCTION
)
198 dso__set_loaded(dso
, map
->type
);
209 * Constructor variant for modules (where we know from /proc/modules where
210 * they are loaded) and for vmlinux, where only after we load all the
211 * symbols we'll know where it starts and ends.
213 struct map
*map__new2(u64 start
, struct dso
*dso
, enum map_type type
)
215 struct map
*map
= calloc(1, (sizeof(*map
) +
216 (dso
->kernel
? sizeof(struct kmap
) : 0)));
219 * ->end will be filled after we load all the symbols
221 map__init(map
, type
, start
, 0, 0, dso
);
228 * Use this and __map__is_kmodule() for map instances that are in
229 * machine->kmaps, and thus have map->groups->machine all properly set, to
230 * disambiguate between the kernel and modules.
232 * When the need arises, introduce map__is_{kernel,kmodule)() that
233 * checks (map->groups != NULL && map->groups->machine != NULL &&
234 * map->dso->kernel) before calling __map__is_{kernel,kmodule}())
236 bool __map__is_kernel(const struct map
*map
)
238 return __machine__kernel_map(map
->groups
->machine
, map
->type
) == map
;
241 static void map__exit(struct map
*map
)
243 BUG_ON(!RB_EMPTY_NODE(&map
->rb_node
));
247 void map__delete(struct map
*map
)
253 void map__put(struct map
*map
)
255 if (map
&& atomic_dec_and_test(&map
->refcnt
))
259 void map__fixup_start(struct map
*map
)
261 struct rb_root
*symbols
= &map
->dso
->symbols
[map
->type
];
262 struct rb_node
*nd
= rb_first(symbols
);
264 struct symbol
*sym
= rb_entry(nd
, struct symbol
, rb_node
);
265 map
->start
= sym
->start
;
269 void map__fixup_end(struct map
*map
)
271 struct rb_root
*symbols
= &map
->dso
->symbols
[map
->type
];
272 struct rb_node
*nd
= rb_last(symbols
);
274 struct symbol
*sym
= rb_entry(nd
, struct symbol
, rb_node
);
279 #define DSO__DELETED "(deleted)"
281 int map__load(struct map
*map
, symbol_filter_t filter
)
283 const char *name
= map
->dso
->long_name
;
286 if (dso__loaded(map
->dso
, map
->type
))
289 nr
= dso__load(map
->dso
, map
, filter
);
291 if (map
->dso
->has_build_id
) {
292 char sbuild_id
[SBUILD_ID_SIZE
];
294 build_id__sprintf(map
->dso
->build_id
,
295 sizeof(map
->dso
->build_id
),
297 pr_warning("%s with build id %s not found",
300 pr_warning("Failed to open %s", name
);
302 pr_warning(", continuing without symbols\n");
304 } else if (nr
== 0) {
305 #ifdef HAVE_LIBELF_SUPPORT
306 const size_t len
= strlen(name
);
307 const size_t real_len
= len
- sizeof(DSO__DELETED
);
309 if (len
> sizeof(DSO__DELETED
) &&
310 strcmp(name
+ real_len
+ 1, DSO__DELETED
) == 0) {
311 pr_warning("%.*s was updated (is prelink enabled?). "
312 "Restart the long running apps that use it!\n",
313 (int)real_len
, name
);
315 pr_warning("no symbols found in %s, maybe install "
316 "a debug package?\n", name
);
325 int __weak
arch__compare_symbol_names(const char *namea
, const char *nameb
)
327 return strcmp(namea
, nameb
);
330 struct symbol
*map__find_symbol(struct map
*map
, u64 addr
,
331 symbol_filter_t filter
)
333 if (map__load(map
, filter
) < 0)
336 return dso__find_symbol(map
->dso
, map
->type
, addr
);
339 struct symbol
*map__find_symbol_by_name(struct map
*map
, const char *name
,
340 symbol_filter_t filter
)
342 if (map__load(map
, filter
) < 0)
345 if (!dso__sorted_by_name(map
->dso
, map
->type
))
346 dso__sort_by_name(map
->dso
, map
->type
);
348 return dso__find_symbol_by_name(map
->dso
, map
->type
, name
);
351 struct map
*map__clone(struct map
*from
)
353 struct map
*map
= memdup(from
, sizeof(*map
));
356 atomic_set(&map
->refcnt
, 1);
357 RB_CLEAR_NODE(&map
->rb_node
);
365 int map__overlap(struct map
*l
, struct map
*r
)
367 if (l
->start
> r
->start
) {
373 if (l
->end
> r
->start
)
379 size_t map__fprintf(struct map
*map
, FILE *fp
)
381 return fprintf(fp
, " %" PRIx64
"-%" PRIx64
" %" PRIx64
" %s\n",
382 map
->start
, map
->end
, map
->pgoff
, map
->dso
->name
);
385 size_t map__fprintf_dsoname(struct map
*map
, FILE *fp
)
387 const char *dsoname
= "[unknown]";
389 if (map
&& map
->dso
&& (map
->dso
->name
|| map
->dso
->long_name
)) {
390 if (symbol_conf
.show_kernel_path
&& map
->dso
->long_name
)
391 dsoname
= map
->dso
->long_name
;
392 else if (map
->dso
->name
)
393 dsoname
= map
->dso
->name
;
396 return fprintf(fp
, "%s", dsoname
);
399 int map__fprintf_srcline(struct map
*map
, u64 addr
, const char *prefix
,
405 if (map
&& map
->dso
) {
406 srcline
= get_srcline(map
->dso
,
407 map__rip_2objdump(map
, addr
), NULL
, true);
408 if (srcline
!= SRCLINE_UNKNOWN
)
409 ret
= fprintf(fp
, "%s%s", prefix
, srcline
);
410 free_srcline(srcline
);
416 * map__rip_2objdump - convert symbol start address to objdump address.
418 * @rip: symbol start address
420 * objdump wants/reports absolute IPs for ET_EXEC, and RIPs for ET_DYN.
421 * map->dso->adjust_symbols==1 for ET_EXEC-like cases except ET_REL which is
422 * relative to section start.
424 * Return: Address suitable for passing to "objdump --start-address="
426 u64
map__rip_2objdump(struct map
*map
, u64 rip
)
428 if (!map
->dso
->adjust_symbols
)
432 return rip
- map
->pgoff
;
435 * kernel modules also have DSO_TYPE_USER in dso->kernel,
436 * but all kernel modules are ET_REL, so won't get here.
438 if (map
->dso
->kernel
== DSO_TYPE_USER
)
439 return rip
+ map
->dso
->text_offset
;
441 return map
->unmap_ip(map
, rip
) - map
->reloc
;
445 * map__objdump_2mem - convert objdump address to a memory address.
447 * @ip: objdump address
449 * Closely related to map__rip_2objdump(), this function takes an address from
450 * objdump and converts it to a memory address. Note this assumes that @map
451 * contains the address. To be sure the result is valid, check it forwards
452 * e.g. map__rip_2objdump(map->map_ip(map, map__objdump_2mem(map, ip))) == ip
454 * Return: Memory address.
456 u64
map__objdump_2mem(struct map
*map
, u64 ip
)
458 if (!map
->dso
->adjust_symbols
)
459 return map
->unmap_ip(map
, ip
);
462 return map
->unmap_ip(map
, ip
+ map
->pgoff
);
465 * kernel modules also have DSO_TYPE_USER in dso->kernel,
466 * but all kernel modules are ET_REL, so won't get here.
468 if (map
->dso
->kernel
== DSO_TYPE_USER
)
469 return map
->unmap_ip(map
, ip
- map
->dso
->text_offset
);
471 return ip
+ map
->reloc
;
474 static void maps__init(struct maps
*maps
)
476 maps
->entries
= RB_ROOT
;
477 pthread_rwlock_init(&maps
->lock
, NULL
);
480 void map_groups__init(struct map_groups
*mg
, struct machine
*machine
)
483 for (i
= 0; i
< MAP__NR_TYPES
; ++i
) {
484 maps__init(&mg
->maps
[i
]);
486 mg
->machine
= machine
;
487 atomic_set(&mg
->refcnt
, 1);
490 static void __maps__purge(struct maps
*maps
)
492 struct rb_root
*root
= &maps
->entries
;
493 struct rb_node
*next
= rb_first(root
);
496 struct map
*pos
= rb_entry(next
, struct map
, rb_node
);
498 next
= rb_next(&pos
->rb_node
);
499 rb_erase_init(&pos
->rb_node
, root
);
504 static void maps__exit(struct maps
*maps
)
506 pthread_rwlock_wrlock(&maps
->lock
);
508 pthread_rwlock_unlock(&maps
->lock
);
511 void map_groups__exit(struct map_groups
*mg
)
515 for (i
= 0; i
< MAP__NR_TYPES
; ++i
)
516 maps__exit(&mg
->maps
[i
]);
519 bool map_groups__empty(struct map_groups
*mg
)
523 for (i
= 0; i
< MAP__NR_TYPES
; ++i
) {
524 if (maps__first(&mg
->maps
[i
]))
531 struct map_groups
*map_groups__new(struct machine
*machine
)
533 struct map_groups
*mg
= malloc(sizeof(*mg
));
536 map_groups__init(mg
, machine
);
541 void map_groups__delete(struct map_groups
*mg
)
543 map_groups__exit(mg
);
547 void map_groups__put(struct map_groups
*mg
)
549 if (mg
&& atomic_dec_and_test(&mg
->refcnt
))
550 map_groups__delete(mg
);
553 struct symbol
*map_groups__find_symbol(struct map_groups
*mg
,
554 enum map_type type
, u64 addr
,
556 symbol_filter_t filter
)
558 struct map
*map
= map_groups__find(mg
, type
, addr
);
560 /* Ensure map is loaded before using map->map_ip */
561 if (map
!= NULL
&& map__load(map
, filter
) >= 0) {
564 return map__find_symbol(map
, map
->map_ip(map
, addr
), filter
);
570 struct symbol
*maps__find_symbol_by_name(struct maps
*maps
, const char *name
,
571 struct map
**mapp
, symbol_filter_t filter
)
576 pthread_rwlock_rdlock(&maps
->lock
);
578 for (nd
= rb_first(&maps
->entries
); nd
; nd
= rb_next(nd
)) {
579 struct map
*pos
= rb_entry(nd
, struct map
, rb_node
);
581 sym
= map__find_symbol_by_name(pos
, name
, filter
);
592 pthread_rwlock_unlock(&maps
->lock
);
596 struct symbol
*map_groups__find_symbol_by_name(struct map_groups
*mg
,
600 symbol_filter_t filter
)
602 struct symbol
*sym
= maps__find_symbol_by_name(&mg
->maps
[type
], name
, mapp
, filter
);
607 int map_groups__find_ams(struct addr_map_symbol
*ams
, symbol_filter_t filter
)
609 if (ams
->addr
< ams
->map
->start
|| ams
->addr
>= ams
->map
->end
) {
610 if (ams
->map
->groups
== NULL
)
612 ams
->map
= map_groups__find(ams
->map
->groups
, ams
->map
->type
,
614 if (ams
->map
== NULL
)
618 ams
->al_addr
= ams
->map
->map_ip(ams
->map
, ams
->addr
);
619 ams
->sym
= map__find_symbol(ams
->map
, ams
->al_addr
, filter
);
621 return ams
->sym
? 0 : -1;
624 static size_t maps__fprintf(struct maps
*maps
, FILE *fp
)
629 pthread_rwlock_rdlock(&maps
->lock
);
631 for (nd
= rb_first(&maps
->entries
); nd
; nd
= rb_next(nd
)) {
632 struct map
*pos
= rb_entry(nd
, struct map
, rb_node
);
633 printed
+= fprintf(fp
, "Map:");
634 printed
+= map__fprintf(pos
, fp
);
636 printed
+= dso__fprintf(pos
->dso
, pos
->type
, fp
);
637 printed
+= fprintf(fp
, "--\n");
641 pthread_rwlock_unlock(&maps
->lock
);
646 size_t __map_groups__fprintf_maps(struct map_groups
*mg
, enum map_type type
,
649 size_t printed
= fprintf(fp
, "%s:\n", map_type__name
[type
]);
650 return printed
+= maps__fprintf(&mg
->maps
[type
], fp
);
653 size_t map_groups__fprintf(struct map_groups
*mg
, FILE *fp
)
655 size_t printed
= 0, i
;
656 for (i
= 0; i
< MAP__NR_TYPES
; ++i
)
657 printed
+= __map_groups__fprintf_maps(mg
, i
, fp
);
661 static void __map_groups__insert(struct map_groups
*mg
, struct map
*map
)
663 __maps__insert(&mg
->maps
[map
->type
], map
);
667 static int maps__fixup_overlappings(struct maps
*maps
, struct map
*map
, FILE *fp
)
669 struct rb_root
*root
;
670 struct rb_node
*next
;
673 pthread_rwlock_wrlock(&maps
->lock
);
675 root
= &maps
->entries
;
676 next
= rb_first(root
);
679 struct map
*pos
= rb_entry(next
, struct map
, rb_node
);
680 next
= rb_next(&pos
->rb_node
);
682 if (!map__overlap(pos
, map
))
686 fputs("overlapping maps:\n", fp
);
687 map__fprintf(map
, fp
);
688 map__fprintf(pos
, fp
);
691 rb_erase_init(&pos
->rb_node
, root
);
693 * Now check if we need to create new maps for areas not
694 * overlapped by the new map:
696 if (map
->start
> pos
->start
) {
697 struct map
*before
= map__clone(pos
);
699 if (before
== NULL
) {
704 before
->end
= map
->start
;
705 __map_groups__insert(pos
->groups
, before
);
707 map__fprintf(before
, fp
);
711 if (map
->end
< pos
->end
) {
712 struct map
*after
= map__clone(pos
);
719 after
->start
= map
->end
;
720 __map_groups__insert(pos
->groups
, after
);
722 map__fprintf(after
, fp
);
734 pthread_rwlock_unlock(&maps
->lock
);
738 int map_groups__fixup_overlappings(struct map_groups
*mg
, struct map
*map
,
741 return maps__fixup_overlappings(&mg
->maps
[map
->type
], map
, fp
);
745 * XXX This should not really _copy_ te maps, but refcount them.
747 int map_groups__clone(struct map_groups
*mg
,
748 struct map_groups
*parent
, enum map_type type
)
752 struct maps
*maps
= &parent
->maps
[type
];
754 pthread_rwlock_rdlock(&maps
->lock
);
756 for (map
= maps__first(maps
); map
; map
= map__next(map
)) {
757 struct map
*new = map__clone(map
);
760 map_groups__insert(mg
, new);
766 pthread_rwlock_unlock(&maps
->lock
);
770 static void __maps__insert(struct maps
*maps
, struct map
*map
)
772 struct rb_node
**p
= &maps
->entries
.rb_node
;
773 struct rb_node
*parent
= NULL
;
774 const u64 ip
= map
->start
;
779 m
= rb_entry(parent
, struct map
, rb_node
);
786 rb_link_node(&map
->rb_node
, parent
, p
);
787 rb_insert_color(&map
->rb_node
, &maps
->entries
);
791 void maps__insert(struct maps
*maps
, struct map
*map
)
793 pthread_rwlock_wrlock(&maps
->lock
);
794 __maps__insert(maps
, map
);
795 pthread_rwlock_unlock(&maps
->lock
);
798 static void __maps__remove(struct maps
*maps
, struct map
*map
)
800 rb_erase_init(&map
->rb_node
, &maps
->entries
);
804 void maps__remove(struct maps
*maps
, struct map
*map
)
806 pthread_rwlock_wrlock(&maps
->lock
);
807 __maps__remove(maps
, map
);
808 pthread_rwlock_unlock(&maps
->lock
);
811 struct map
*maps__find(struct maps
*maps
, u64 ip
)
813 struct rb_node
**p
, *parent
= NULL
;
816 pthread_rwlock_rdlock(&maps
->lock
);
818 p
= &maps
->entries
.rb_node
;
821 m
= rb_entry(parent
, struct map
, rb_node
);
824 else if (ip
>= m
->end
)
832 pthread_rwlock_unlock(&maps
->lock
);
836 struct map
*maps__first(struct maps
*maps
)
838 struct rb_node
*first
= rb_first(&maps
->entries
);
841 return rb_entry(first
, struct map
, rb_node
);
845 struct map
*map__next(struct map
*map
)
847 struct rb_node
*next
= rb_next(&map
->rb_node
);
850 return rb_entry(next
, struct map
, rb_node
);
854 struct kmap
*map__kmap(struct map
*map
)
856 if (!map
->dso
|| !map
->dso
->kernel
) {
857 pr_err("Internal error: map__kmap with a non-kernel map\n");
860 return (struct kmap
*)(map
+ 1);
863 struct map_groups
*map__kmaps(struct map
*map
)
865 struct kmap
*kmap
= map__kmap(map
);
867 if (!kmap
|| !kmap
->kmaps
) {
868 pr_err("Internal error: map__kmaps with a non-kernel map\n");
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