]>
git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - tools/perf/util/map.c
9 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
18 #include <linux/string.h>
21 static void __maps__insert(struct maps
*maps
, struct map
*map
);
23 const char *map_type__name
[MAP__NR_TYPES
] = {
24 [MAP__FUNCTION
] = "Functions",
25 [MAP__VARIABLE
] = "Variables",
28 static inline int is_anon_memory(const char *filename
, u32 flags
)
30 return flags
& MAP_HUGETLB
||
31 !strcmp(filename
, "//anon") ||
32 !strncmp(filename
, "/dev/zero", sizeof("/dev/zero") - 1) ||
33 !strncmp(filename
, "/anon_hugepage", sizeof("/anon_hugepage") - 1);
36 static inline int is_no_dso_memory(const char *filename
)
38 return !strncmp(filename
, "[stack", 6) ||
39 !strncmp(filename
, "/SYSV",5) ||
40 !strcmp(filename
, "[heap]");
43 static inline int is_android_lib(const char *filename
)
45 return !strncmp(filename
, "/data/app-lib", 13) ||
46 !strncmp(filename
, "/system/lib", 11);
49 static inline bool replace_android_lib(const char *filename
, char *newfilename
)
53 size_t app_abi_length
, new_length
;
54 size_t lib_length
= 0;
56 libname
= strrchr(filename
, '/');
58 lib_length
= strlen(libname
);
60 app_abi
= getenv("APP_ABI");
64 app_abi_length
= strlen(app_abi
);
66 if (!strncmp(filename
, "/data/app-lib", 13)) {
72 new_length
= 7 + app_abi_length
+ lib_length
;
74 apk_path
= getenv("APK_PATH");
76 new_length
+= strlen(apk_path
) + 1;
77 if (new_length
> PATH_MAX
)
79 snprintf(newfilename
, new_length
,
80 "%s/libs/%s/%s", apk_path
, app_abi
, libname
);
82 if (new_length
> PATH_MAX
)
84 snprintf(newfilename
, new_length
,
85 "libs/%s/%s", app_abi
, libname
);
90 if (!strncmp(filename
, "/system/lib/", 11)) {
96 ndk
= getenv("NDK_ROOT");
97 app
= getenv("APP_PLATFORM");
102 ndk_length
= strlen(ndk
);
103 app_length
= strlen(app
);
105 if (!(ndk_length
&& app_length
&& app_abi_length
))
108 arch
= !strncmp(app_abi
, "arm", 3) ? "arm" :
109 !strncmp(app_abi
, "mips", 4) ? "mips" :
110 !strncmp(app_abi
, "x86", 3) ? "x86" : NULL
;
115 new_length
= 27 + ndk_length
+
116 app_length
+ lib_length
119 if (new_length
> PATH_MAX
)
121 snprintf(newfilename
, new_length
,
122 "%s/platforms/%s/arch-%s/usr/lib/%s",
123 ndk
, app
, arch
, libname
);
130 void map__init(struct map
*map
, enum map_type type
,
131 u64 start
, u64 end
, u64 pgoff
, struct dso
*dso
)
138 map
->dso
= dso__get(dso
);
139 map
->map_ip
= map__map_ip
;
140 map
->unmap_ip
= map__unmap_ip
;
141 RB_CLEAR_NODE(&map
->rb_node
);
143 map
->erange_warned
= false;
144 atomic_set(&map
->refcnt
, 1);
147 struct map
*map__new(struct machine
*machine
, u64 start
, u64 len
,
148 u64 pgoff
, u32 pid
, u32 d_maj
, u32 d_min
, u64 ino
,
149 u64 ino_gen
, u32 prot
, u32 flags
, char *filename
,
150 enum map_type type
, struct thread
*thread
)
152 struct map
*map
= malloc(sizeof(*map
));
155 char newfilename
[PATH_MAX
];
157 int anon
, no_dso
, vdso
, android
;
159 android
= is_android_lib(filename
);
160 anon
= is_anon_memory(filename
, flags
);
161 vdso
= is_vdso_map(filename
);
162 no_dso
= is_no_dso_memory(filename
);
167 map
->ino_generation
= ino_gen
;
171 if ((anon
|| no_dso
) && type
== MAP__FUNCTION
) {
172 snprintf(newfilename
, sizeof(newfilename
), "/tmp/perf-%d.map", pid
);
173 filename
= newfilename
;
177 if (replace_android_lib(filename
, newfilename
))
178 filename
= newfilename
;
183 dso
= machine__findnew_vdso(machine
, thread
);
185 dso
= machine__findnew_dso(machine
, filename
);
190 map__init(map
, type
, start
, start
+ len
, pgoff
, dso
);
192 if (anon
|| no_dso
) {
193 map
->map_ip
= map
->unmap_ip
= identity__map_ip
;
196 * Set memory without DSO as loaded. All map__find_*
197 * functions still return NULL, and we avoid the
198 * unnecessary map__load warning.
200 if (type
!= MAP__FUNCTION
)
201 dso__set_loaded(dso
, map
->type
);
212 * Constructor variant for modules (where we know from /proc/modules where
213 * they are loaded) and for vmlinux, where only after we load all the
214 * symbols we'll know where it starts and ends.
216 struct map
*map__new2(u64 start
, struct dso
*dso
, enum map_type type
)
218 struct map
*map
= calloc(1, (sizeof(*map
) +
219 (dso
->kernel
? sizeof(struct kmap
) : 0)));
222 * ->end will be filled after we load all the symbols
224 map__init(map
, type
, start
, 0, 0, dso
);
231 * Use this and __map__is_kmodule() for map instances that are in
232 * machine->kmaps, and thus have map->groups->machine all properly set, to
233 * disambiguate between the kernel and modules.
235 * When the need arises, introduce map__is_{kernel,kmodule)() that
236 * checks (map->groups != NULL && map->groups->machine != NULL &&
237 * map->dso->kernel) before calling __map__is_{kernel,kmodule}())
239 bool __map__is_kernel(const struct map
*map
)
241 return __machine__kernel_map(map
->groups
->machine
, map
->type
) == map
;
244 static void map__exit(struct map
*map
)
246 BUG_ON(!RB_EMPTY_NODE(&map
->rb_node
));
250 void map__delete(struct map
*map
)
256 void map__put(struct map
*map
)
258 if (map
&& atomic_dec_and_test(&map
->refcnt
))
262 void map__fixup_start(struct map
*map
)
264 struct rb_root
*symbols
= &map
->dso
->symbols
[map
->type
];
265 struct rb_node
*nd
= rb_first(symbols
);
267 struct symbol
*sym
= rb_entry(nd
, struct symbol
, rb_node
);
268 map
->start
= sym
->start
;
272 void map__fixup_end(struct map
*map
)
274 struct rb_root
*symbols
= &map
->dso
->symbols
[map
->type
];
275 struct rb_node
*nd
= rb_last(symbols
);
277 struct symbol
*sym
= rb_entry(nd
, struct symbol
, rb_node
);
282 #define DSO__DELETED "(deleted)"
284 int map__load(struct map
*map
)
286 const char *name
= map
->dso
->long_name
;
289 if (dso__loaded(map
->dso
, map
->type
))
292 nr
= dso__load(map
->dso
, map
);
294 if (map
->dso
->has_build_id
) {
295 char sbuild_id
[SBUILD_ID_SIZE
];
297 build_id__sprintf(map
->dso
->build_id
,
298 sizeof(map
->dso
->build_id
),
300 pr_warning("%s with build id %s not found",
303 pr_warning("Failed to open %s", name
);
305 pr_warning(", continuing without symbols\n");
307 } else if (nr
== 0) {
308 #ifdef HAVE_LIBELF_SUPPORT
309 const size_t len
= strlen(name
);
310 const size_t real_len
= len
- sizeof(DSO__DELETED
);
312 if (len
> sizeof(DSO__DELETED
) &&
313 strcmp(name
+ real_len
+ 1, DSO__DELETED
) == 0) {
314 pr_warning("%.*s was updated (is prelink enabled?). "
315 "Restart the long running apps that use it!\n",
316 (int)real_len
, name
);
318 pr_warning("no symbols found in %s, maybe install "
319 "a debug package?\n", name
);
328 int __weak
arch__compare_symbol_names(const char *namea
, const char *nameb
)
330 return strcmp(namea
, nameb
);
333 struct symbol
*map__find_symbol(struct map
*map
, u64 addr
)
335 if (map__load(map
) < 0)
338 return dso__find_symbol(map
->dso
, map
->type
, addr
);
341 struct symbol
*map__find_symbol_by_name(struct map
*map
, const char *name
)
343 if (map__load(map
) < 0)
346 if (!dso__sorted_by_name(map
->dso
, map
->type
))
347 dso__sort_by_name(map
->dso
, map
->type
);
349 return dso__find_symbol_by_name(map
->dso
, map
->type
, name
);
352 struct map
*map__clone(struct map
*from
)
354 struct map
*map
= memdup(from
, sizeof(*map
));
357 atomic_set(&map
->refcnt
, 1);
358 RB_CLEAR_NODE(&map
->rb_node
);
366 int map__overlap(struct map
*l
, struct map
*r
)
368 if (l
->start
> r
->start
) {
374 if (l
->end
> r
->start
)
380 size_t map__fprintf(struct map
*map
, FILE *fp
)
382 return fprintf(fp
, " %" PRIx64
"-%" PRIx64
" %" PRIx64
" %s\n",
383 map
->start
, map
->end
, map
->pgoff
, map
->dso
->name
);
386 size_t map__fprintf_dsoname(struct map
*map
, FILE *fp
)
388 const char *dsoname
= "[unknown]";
390 if (map
&& map
->dso
) {
391 if (symbol_conf
.show_kernel_path
&& map
->dso
->long_name
)
392 dsoname
= map
->dso
->long_name
;
394 dsoname
= map
->dso
->name
;
397 return fprintf(fp
, "%s", dsoname
);
400 int map__fprintf_srcline(struct map
*map
, u64 addr
, const char *prefix
,
406 if (map
&& map
->dso
) {
407 srcline
= get_srcline(map
->dso
,
408 map__rip_2objdump(map
, addr
), NULL
, true);
409 if (srcline
!= SRCLINE_UNKNOWN
)
410 ret
= fprintf(fp
, "%s%s", prefix
, srcline
);
411 free_srcline(srcline
);
417 * map__rip_2objdump - convert symbol start address to objdump address.
419 * @rip: symbol start address
421 * objdump wants/reports absolute IPs for ET_EXEC, and RIPs for ET_DYN.
422 * map->dso->adjust_symbols==1 for ET_EXEC-like cases except ET_REL which is
423 * relative to section start.
425 * Return: Address suitable for passing to "objdump --start-address="
427 u64
map__rip_2objdump(struct map
*map
, u64 rip
)
429 if (!map
->dso
->adjust_symbols
)
433 return rip
- map
->pgoff
;
436 * kernel modules also have DSO_TYPE_USER in dso->kernel,
437 * but all kernel modules are ET_REL, so won't get here.
439 if (map
->dso
->kernel
== DSO_TYPE_USER
)
440 return rip
+ map
->dso
->text_offset
;
442 return map
->unmap_ip(map
, rip
) - map
->reloc
;
446 * map__objdump_2mem - convert objdump address to a memory address.
448 * @ip: objdump address
450 * Closely related to map__rip_2objdump(), this function takes an address from
451 * objdump and converts it to a memory address. Note this assumes that @map
452 * contains the address. To be sure the result is valid, check it forwards
453 * e.g. map__rip_2objdump(map->map_ip(map, map__objdump_2mem(map, ip))) == ip
455 * Return: Memory address.
457 u64
map__objdump_2mem(struct map
*map
, u64 ip
)
459 if (!map
->dso
->adjust_symbols
)
460 return map
->unmap_ip(map
, ip
);
463 return map
->unmap_ip(map
, ip
+ map
->pgoff
);
466 * kernel modules also have DSO_TYPE_USER in dso->kernel,
467 * but all kernel modules are ET_REL, so won't get here.
469 if (map
->dso
->kernel
== DSO_TYPE_USER
)
470 return map
->unmap_ip(map
, ip
- map
->dso
->text_offset
);
472 return ip
+ map
->reloc
;
475 static void maps__init(struct maps
*maps
)
477 maps
->entries
= RB_ROOT
;
478 pthread_rwlock_init(&maps
->lock
, NULL
);
481 void map_groups__init(struct map_groups
*mg
, struct machine
*machine
)
484 for (i
= 0; i
< MAP__NR_TYPES
; ++i
) {
485 maps__init(&mg
->maps
[i
]);
487 mg
->machine
= machine
;
488 atomic_set(&mg
->refcnt
, 1);
491 static void __maps__purge(struct maps
*maps
)
493 struct rb_root
*root
= &maps
->entries
;
494 struct rb_node
*next
= rb_first(root
);
497 struct map
*pos
= rb_entry(next
, struct map
, rb_node
);
499 next
= rb_next(&pos
->rb_node
);
500 rb_erase_init(&pos
->rb_node
, root
);
505 static void maps__exit(struct maps
*maps
)
507 pthread_rwlock_wrlock(&maps
->lock
);
509 pthread_rwlock_unlock(&maps
->lock
);
512 void map_groups__exit(struct map_groups
*mg
)
516 for (i
= 0; i
< MAP__NR_TYPES
; ++i
)
517 maps__exit(&mg
->maps
[i
]);
520 bool map_groups__empty(struct map_groups
*mg
)
524 for (i
= 0; i
< MAP__NR_TYPES
; ++i
) {
525 if (maps__first(&mg
->maps
[i
]))
532 struct map_groups
*map_groups__new(struct machine
*machine
)
534 struct map_groups
*mg
= malloc(sizeof(*mg
));
537 map_groups__init(mg
, machine
);
542 void map_groups__delete(struct map_groups
*mg
)
544 map_groups__exit(mg
);
548 void map_groups__put(struct map_groups
*mg
)
550 if (mg
&& atomic_dec_and_test(&mg
->refcnt
))
551 map_groups__delete(mg
);
554 struct symbol
*map_groups__find_symbol(struct map_groups
*mg
,
555 enum map_type type
, u64 addr
,
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
) >= 0) {
564 return map__find_symbol(map
, map
->map_ip(map
, addr
));
570 struct symbol
*maps__find_symbol_by_name(struct maps
*maps
, const char *name
,
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
);
592 pthread_rwlock_unlock(&maps
->lock
);
596 struct symbol
*map_groups__find_symbol_by_name(struct map_groups
*mg
,
601 struct symbol
*sym
= maps__find_symbol_by_name(&mg
->maps
[type
], name
, mapp
);
606 int map_groups__find_ams(struct addr_map_symbol
*ams
)
608 if (ams
->addr
< ams
->map
->start
|| ams
->addr
>= ams
->map
->end
) {
609 if (ams
->map
->groups
== NULL
)
611 ams
->map
= map_groups__find(ams
->map
->groups
, ams
->map
->type
,
613 if (ams
->map
== NULL
)
617 ams
->al_addr
= ams
->map
->map_ip(ams
->map
, ams
->addr
);
618 ams
->sym
= map__find_symbol(ams
->map
, ams
->al_addr
);
620 return ams
->sym
? 0 : -1;
623 static size_t maps__fprintf(struct maps
*maps
, FILE *fp
)
628 pthread_rwlock_rdlock(&maps
->lock
);
630 for (nd
= rb_first(&maps
->entries
); nd
; nd
= rb_next(nd
)) {
631 struct map
*pos
= rb_entry(nd
, struct map
, rb_node
);
632 printed
+= fprintf(fp
, "Map:");
633 printed
+= map__fprintf(pos
, fp
);
635 printed
+= dso__fprintf(pos
->dso
, pos
->type
, fp
);
636 printed
+= fprintf(fp
, "--\n");
640 pthread_rwlock_unlock(&maps
->lock
);
645 size_t __map_groups__fprintf_maps(struct map_groups
*mg
, enum map_type type
,
648 size_t printed
= fprintf(fp
, "%s:\n", map_type__name
[type
]);
649 return printed
+= maps__fprintf(&mg
->maps
[type
], fp
);
652 size_t map_groups__fprintf(struct map_groups
*mg
, FILE *fp
)
654 size_t printed
= 0, i
;
655 for (i
= 0; i
< MAP__NR_TYPES
; ++i
)
656 printed
+= __map_groups__fprintf_maps(mg
, i
, fp
);
660 static void __map_groups__insert(struct map_groups
*mg
, struct map
*map
)
662 __maps__insert(&mg
->maps
[map
->type
], map
);
666 static int maps__fixup_overlappings(struct maps
*maps
, struct map
*map
, FILE *fp
)
668 struct rb_root
*root
;
669 struct rb_node
*next
;
672 pthread_rwlock_wrlock(&maps
->lock
);
674 root
= &maps
->entries
;
675 next
= rb_first(root
);
678 struct map
*pos
= rb_entry(next
, struct map
, rb_node
);
679 next
= rb_next(&pos
->rb_node
);
681 if (!map__overlap(pos
, map
))
687 pr_warning("overlapping maps in %s "
688 "(disable tui for more info)\n",
691 fputs("overlapping maps:\n", fp
);
692 map__fprintf(map
, fp
);
693 map__fprintf(pos
, fp
);
697 rb_erase_init(&pos
->rb_node
, root
);
699 * Now check if we need to create new maps for areas not
700 * overlapped by the new map:
702 if (map
->start
> pos
->start
) {
703 struct map
*before
= map__clone(pos
);
705 if (before
== NULL
) {
710 before
->end
= map
->start
;
711 __map_groups__insert(pos
->groups
, before
);
712 if (verbose
>= 2 && !use_browser
)
713 map__fprintf(before
, fp
);
717 if (map
->end
< pos
->end
) {
718 struct map
*after
= map__clone(pos
);
725 after
->start
= map
->end
;
726 __map_groups__insert(pos
->groups
, after
);
727 if (verbose
>= 2 && !use_browser
)
728 map__fprintf(after
, fp
);
740 pthread_rwlock_unlock(&maps
->lock
);
744 int map_groups__fixup_overlappings(struct map_groups
*mg
, struct map
*map
,
747 return maps__fixup_overlappings(&mg
->maps
[map
->type
], map
, fp
);
751 * XXX This should not really _copy_ te maps, but refcount them.
753 int map_groups__clone(struct thread
*thread
,
754 struct map_groups
*parent
, enum map_type type
)
756 struct map_groups
*mg
= thread
->mg
;
759 struct maps
*maps
= &parent
->maps
[type
];
761 pthread_rwlock_rdlock(&maps
->lock
);
763 for (map
= maps__first(maps
); map
; map
= map__next(map
)) {
764 struct map
*new = map__clone(map
);
768 err
= unwind__prepare_access(thread
, new, NULL
);
772 map_groups__insert(mg
, new);
778 pthread_rwlock_unlock(&maps
->lock
);
782 static void __maps__insert(struct maps
*maps
, struct map
*map
)
784 struct rb_node
**p
= &maps
->entries
.rb_node
;
785 struct rb_node
*parent
= NULL
;
786 const u64 ip
= map
->start
;
791 m
= rb_entry(parent
, struct map
, rb_node
);
798 rb_link_node(&map
->rb_node
, parent
, p
);
799 rb_insert_color(&map
->rb_node
, &maps
->entries
);
803 void maps__insert(struct maps
*maps
, struct map
*map
)
805 pthread_rwlock_wrlock(&maps
->lock
);
806 __maps__insert(maps
, map
);
807 pthread_rwlock_unlock(&maps
->lock
);
810 static void __maps__remove(struct maps
*maps
, struct map
*map
)
812 rb_erase_init(&map
->rb_node
, &maps
->entries
);
816 void maps__remove(struct maps
*maps
, struct map
*map
)
818 pthread_rwlock_wrlock(&maps
->lock
);
819 __maps__remove(maps
, map
);
820 pthread_rwlock_unlock(&maps
->lock
);
823 struct map
*maps__find(struct maps
*maps
, u64 ip
)
825 struct rb_node
**p
, *parent
= NULL
;
828 pthread_rwlock_rdlock(&maps
->lock
);
830 p
= &maps
->entries
.rb_node
;
833 m
= rb_entry(parent
, struct map
, rb_node
);
836 else if (ip
>= m
->end
)
844 pthread_rwlock_unlock(&maps
->lock
);
848 struct map
*maps__first(struct maps
*maps
)
850 struct rb_node
*first
= rb_first(&maps
->entries
);
853 return rb_entry(first
, struct map
, rb_node
);
857 struct map
*map__next(struct map
*map
)
859 struct rb_node
*next
= rb_next(&map
->rb_node
);
862 return rb_entry(next
, struct map
, rb_node
);
866 struct kmap
*map__kmap(struct map
*map
)
868 if (!map
->dso
|| !map
->dso
->kernel
) {
869 pr_err("Internal error: map__kmap with a non-kernel map\n");
872 return (struct kmap
*)(map
+ 1);
875 struct map_groups
*map__kmaps(struct map
*map
)
877 struct kmap
*kmap
= map__kmap(map
);
879 if (!kmap
|| !kmap
->kmaps
) {
880 pr_err("Internal error: map__kmaps with a non-kernel map\n");