1#include "symbol.h"
2#include <errno.h>
3#include <inttypes.h>
4#include <limits.h>
5#include <stdlib.h>
6#include <string.h>
7#include <stdio.h>
8#include <unistd.h>
9#include <uapi/linux/mman.h>
10#include "map.h"
11#include "thread.h"
12#include "vdso.h"
13#include "build-id.h"
14#include "util.h"
15#include "debug.h"
16#include "machine.h"
17#include <linux/string.h>
18#include "srcline.h"
19#include "unwind.h"
20
21static void __maps__insert(struct maps *maps, struct map *map);
22
23const char *map_type__name[MAP__NR_TYPES] = {
24 [MAP__FUNCTION] = "Functions",
25 [MAP__VARIABLE] = "Variables",
26};
27
28static inline int is_anon_memory(const char *filename, u32 flags)
29{
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);
34}
35
36static inline int is_no_dso_memory(const char *filename)
37{
38 return !strncmp(filename, "[stack", 6) ||
39 !strncmp(filename, "/SYSV",5) ||
40 !strcmp(filename, "[heap]");
41}
42
43static inline int is_android_lib(const char *filename)
44{
45 return !strncmp(filename, "/data/app-lib", 13) ||
46 !strncmp(filename, "/system/lib", 11);
47}
48
49static inline bool replace_android_lib(const char *filename, char *newfilename)
50{
51 const char *libname;
52 char *app_abi;
53 size_t app_abi_length, new_length;
54 size_t lib_length = 0;
55
56 libname = strrchr(filename, '/');
57 if (libname)
58 lib_length = strlen(libname);
59
60 app_abi = getenv("APP_ABI");
61 if (!app_abi)
62 return false;
63
64 app_abi_length = strlen(app_abi);
65
66 if (!strncmp(filename, "/data/app-lib", 13)) {
67 char *apk_path;
68
69 if (!app_abi_length)
70 return false;
71
72 new_length = 7 + app_abi_length + lib_length;
73
74 apk_path = getenv("APK_PATH");
75 if (apk_path) {
76 new_length += strlen(apk_path) + 1;
77 if (new_length > PATH_MAX)
78 return false;
79 snprintf(newfilename, new_length,
80 "%s/libs/%s/%s", apk_path, app_abi, libname);
81 } else {
82 if (new_length > PATH_MAX)
83 return false;
84 snprintf(newfilename, new_length,
85 "libs/%s/%s", app_abi, libname);
86 }
87 return true;
88 }
89
90 if (!strncmp(filename, "/system/lib/", 11)) {
91 char *ndk, *app;
92 const char *arch;
93 size_t ndk_length;
94 size_t app_length;
95
96 ndk = getenv("NDK_ROOT");
97 app = getenv("APP_PLATFORM");
98
99 if (!(ndk && app))
100 return false;
101
102 ndk_length = strlen(ndk);
103 app_length = strlen(app);
104
105 if (!(ndk_length && app_length && app_abi_length))
106 return false;
107
108 arch = !strncmp(app_abi, "arm", 3) ? "arm" :
109 !strncmp(app_abi, "mips", 4) ? "mips" :
110 !strncmp(app_abi, "x86", 3) ? "x86" : NULL;
111
112 if (!arch)
113 return false;
114
115 new_length = 27 + ndk_length +
116 app_length + lib_length
117 + strlen(arch);
118
119 if (new_length > PATH_MAX)
120 return false;
121 snprintf(newfilename, new_length,
122 "%s/platforms/%s/arch-%s/usr/lib/%s",
123 ndk, app, arch, libname);
124
125 return true;
126 }
127 return false;
128}
129
130void map__init(struct map *map, enum map_type type,
131 u64 start, u64 end, u64 pgoff, struct dso *dso)
132{
133 map->type = type;
134 map->start = start;
135 map->end = end;
136 map->pgoff = pgoff;
137 map->reloc = 0;
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);
142 map->groups = NULL;
143 map->erange_warned = false;
144 refcount_set(&map->refcnt, 1);
145}
146
147struct 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)
151{
152 struct map *map = malloc(sizeof(*map));
153
154 if (map != NULL) {
155 char newfilename[PATH_MAX];
156 struct dso *dso;
157 int anon, no_dso, vdso, android;
158
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);
163
164 map->maj = d_maj;
165 map->min = d_min;
166 map->ino = ino;
167 map->ino_generation = ino_gen;
168 map->prot = prot;
169 map->flags = flags;
170
171 if ((anon || no_dso) && type == MAP__FUNCTION) {
172 snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", pid);
173 filename = newfilename;
174 }
175
176 if (android) {
177 if (replace_android_lib(filename, newfilename))
178 filename = newfilename;
179 }
180
181 if (vdso) {
182 pgoff = 0;
183 dso = machine__findnew_vdso(machine, thread);
184 } else
185 dso = machine__findnew_dso(machine, filename);
186
187 if (dso == NULL)
188 goto out_delete;
189
190 map__init(map, type, start, start + len, pgoff, dso);
191
192 if (anon || no_dso) {
193 map->map_ip = map->unmap_ip = identity__map_ip;
194
195
196
197
198
199
200 if (type != MAP__FUNCTION)
201 dso__set_loaded(dso, map->type);
202 }
203 dso__put(dso);
204 }
205 return map;
206out_delete:
207 free(map);
208 return NULL;
209}
210
211
212
213
214
215
216struct map *map__new2(u64 start, struct dso *dso, enum map_type type)
217{
218 struct map *map = calloc(1, (sizeof(*map) +
219 (dso->kernel ? sizeof(struct kmap) : 0)));
220 if (map != NULL) {
221
222
223
224 map__init(map, type, start, 0, 0, dso);
225 }
226
227 return map;
228}
229
230
231
232
233
234
235
236
237
238
239bool __map__is_kernel(const struct map *map)
240{
241 return __machine__kernel_map(map->groups->machine, map->type) == map;
242}
243
244static void map__exit(struct map *map)
245{
246 BUG_ON(!RB_EMPTY_NODE(&map->rb_node));
247 dso__zput(map->dso);
248}
249
250void map__delete(struct map *map)
251{
252 map__exit(map);
253 free(map);
254}
255
256void map__put(struct map *map)
257{
258 if (map && refcount_dec_and_test(&map->refcnt))
259 map__delete(map);
260}
261
262void map__fixup_start(struct map *map)
263{
264 struct rb_root *symbols = &map->dso->symbols[map->type];
265 struct rb_node *nd = rb_first(symbols);
266 if (nd != NULL) {
267 struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
268 map->start = sym->start;
269 }
270}
271
272void map__fixup_end(struct map *map)
273{
274 struct rb_root *symbols = &map->dso->symbols[map->type];
275 struct rb_node *nd = rb_last(symbols);
276 if (nd != NULL) {
277 struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
278 map->end = sym->end;
279 }
280}
281
282#define DSO__DELETED "(deleted)"
283
284int map__load(struct map *map)
285{
286 const char *name = map->dso->long_name;
287 int nr;
288
289 if (dso__loaded(map->dso, map->type))
290 return 0;
291
292 nr = dso__load(map->dso, map);
293 if (nr < 0) {
294 if (map->dso->has_build_id) {
295 char sbuild_id[SBUILD_ID_SIZE];
296
297 build_id__sprintf(map->dso->build_id,
298 sizeof(map->dso->build_id),
299 sbuild_id);
300 pr_warning("%s with build id %s not found",
301 name, sbuild_id);
302 } else
303 pr_warning("Failed to open %s", name);
304
305 pr_warning(", continuing without symbols\n");
306 return -1;
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);
311
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);
317 } else {
318 pr_warning("no symbols found in %s, maybe install "
319 "a debug package?\n", name);
320 }
321#endif
322 return -1;
323 }
324
325 return 0;
326}
327
328struct symbol *map__find_symbol(struct map *map, u64 addr)
329{
330 if (map__load(map) < 0)
331 return NULL;
332
333 return dso__find_symbol(map->dso, map->type, addr);
334}
335
336struct symbol *map__find_symbol_by_name(struct map *map, const char *name)
337{
338 if (map__load(map) < 0)
339 return NULL;
340
341 if (!dso__sorted_by_name(map->dso, map->type))
342 dso__sort_by_name(map->dso, map->type);
343
344 return dso__find_symbol_by_name(map->dso, map->type, name);
345}
346
347struct map *map__clone(struct map *from)
348{
349 struct map *map = memdup(from, sizeof(*map));
350
351 if (map != NULL) {
352 refcount_set(&map->refcnt, 1);
353 RB_CLEAR_NODE(&map->rb_node);
354 dso__get(map->dso);
355 map->groups = NULL;
356 }
357
358 return map;
359}
360
361int map__overlap(struct map *l, struct map *r)
362{
363 if (l->start > r->start) {
364 struct map *t = l;
365 l = r;
366 r = t;
367 }
368
369 if (l->end > r->start)
370 return 1;
371
372 return 0;
373}
374
375size_t map__fprintf(struct map *map, FILE *fp)
376{
377 return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %" PRIx64 " %s\n",
378 map->start, map->end, map->pgoff, map->dso->name);
379}
380
381size_t map__fprintf_dsoname(struct map *map, FILE *fp)
382{
383 const char *dsoname = "[unknown]";
384
385 if (map && map->dso) {
386 if (symbol_conf.show_kernel_path && map->dso->long_name)
387 dsoname = map->dso->long_name;
388 else
389 dsoname = map->dso->name;
390 }
391
392 return fprintf(fp, "%s", dsoname);
393}
394
395int map__fprintf_srcline(struct map *map, u64 addr, const char *prefix,
396 FILE *fp)
397{
398 char *srcline;
399 int ret = 0;
400
401 if (map && map->dso) {
402 srcline = get_srcline(map->dso,
403 map__rip_2objdump(map, addr), NULL,
404 true, true);
405 if (srcline != SRCLINE_UNKNOWN)
406 ret = fprintf(fp, "%s%s", prefix, srcline);
407 free_srcline(srcline);
408 }
409 return ret;
410}
411
412
413
414
415
416
417
418
419
420
421
422
423u64 map__rip_2objdump(struct map *map, u64 rip)
424{
425 if (!map->dso->adjust_symbols)
426 return rip;
427
428 if (map->dso->rel)
429 return rip - map->pgoff;
430
431
432
433
434
435 if (map->dso->kernel == DSO_TYPE_USER)
436 return rip + map->dso->text_offset;
437
438 return map->unmap_ip(map, rip) - map->reloc;
439}
440
441
442
443
444
445
446
447
448
449
450
451
452
453u64 map__objdump_2mem(struct map *map, u64 ip)
454{
455 if (!map->dso->adjust_symbols)
456 return map->unmap_ip(map, ip);
457
458 if (map->dso->rel)
459 return map->unmap_ip(map, ip + map->pgoff);
460
461
462
463
464
465 if (map->dso->kernel == DSO_TYPE_USER)
466 return map->unmap_ip(map, ip - map->dso->text_offset);
467
468 return ip + map->reloc;
469}
470
471static void maps__init(struct maps *maps)
472{
473 maps->entries = RB_ROOT;
474 pthread_rwlock_init(&maps->lock, NULL);
475}
476
477void map_groups__init(struct map_groups *mg, struct machine *machine)
478{
479 int i;
480 for (i = 0; i < MAP__NR_TYPES; ++i) {
481 maps__init(&mg->maps[i]);
482 }
483 mg->machine = machine;
484 refcount_set(&mg->refcnt, 1);
485}
486
487static void __maps__purge(struct maps *maps)
488{
489 struct rb_root *root = &maps->entries;
490 struct rb_node *next = rb_first(root);
491
492 while (next) {
493 struct map *pos = rb_entry(next, struct map, rb_node);
494
495 next = rb_next(&pos->rb_node);
496 rb_erase_init(&pos->rb_node, root);
497 map__put(pos);
498 }
499}
500
501static void maps__exit(struct maps *maps)
502{
503 pthread_rwlock_wrlock(&maps->lock);
504 __maps__purge(maps);
505 pthread_rwlock_unlock(&maps->lock);
506}
507
508void map_groups__exit(struct map_groups *mg)
509{
510 int i;
511
512 for (i = 0; i < MAP__NR_TYPES; ++i)
513 maps__exit(&mg->maps[i]);
514}
515
516bool map_groups__empty(struct map_groups *mg)
517{
518 int i;
519
520 for (i = 0; i < MAP__NR_TYPES; ++i) {
521 if (maps__first(&mg->maps[i]))
522 return false;
523 }
524
525 return true;
526}
527
528struct map_groups *map_groups__new(struct machine *machine)
529{
530 struct map_groups *mg = malloc(sizeof(*mg));
531
532 if (mg != NULL)
533 map_groups__init(mg, machine);
534
535 return mg;
536}
537
538void map_groups__delete(struct map_groups *mg)
539{
540 map_groups__exit(mg);
541 free(mg);
542}
543
544void map_groups__put(struct map_groups *mg)
545{
546 if (mg && refcount_dec_and_test(&mg->refcnt))
547 map_groups__delete(mg);
548}
549
550struct symbol *map_groups__find_symbol(struct map_groups *mg,
551 enum map_type type, u64 addr,
552 struct map **mapp)
553{
554 struct map *map = map_groups__find(mg, type, addr);
555
556
557 if (map != NULL && map__load(map) >= 0) {
558 if (mapp != NULL)
559 *mapp = map;
560 return map__find_symbol(map, map->map_ip(map, addr));
561 }
562
563 return NULL;
564}
565
566struct symbol *maps__find_symbol_by_name(struct maps *maps, const char *name,
567 struct map **mapp)
568{
569 struct symbol *sym;
570 struct rb_node *nd;
571
572 pthread_rwlock_rdlock(&maps->lock);
573
574 for (nd = rb_first(&maps->entries); nd; nd = rb_next(nd)) {
575 struct map *pos = rb_entry(nd, struct map, rb_node);
576
577 sym = map__find_symbol_by_name(pos, name);
578
579 if (sym == NULL)
580 continue;
581 if (mapp != NULL)
582 *mapp = pos;
583 goto out;
584 }
585
586 sym = NULL;
587out:
588 pthread_rwlock_unlock(&maps->lock);
589 return sym;
590}
591
592struct symbol *map_groups__find_symbol_by_name(struct map_groups *mg,
593 enum map_type type,
594 const char *name,
595 struct map **mapp)
596{
597 struct symbol *sym = maps__find_symbol_by_name(&mg->maps[type], name, mapp);
598
599 return sym;
600}
601
602int map_groups__find_ams(struct addr_map_symbol *ams)
603{
604 if (ams->addr < ams->map->start || ams->addr >= ams->map->end) {
605 if (ams->map->groups == NULL)
606 return -1;
607 ams->map = map_groups__find(ams->map->groups, ams->map->type,
608 ams->addr);
609 if (ams->map == NULL)
610 return -1;
611 }
612
613 ams->al_addr = ams->map->map_ip(ams->map, ams->addr);
614 ams->sym = map__find_symbol(ams->map, ams->al_addr);
615
616 return ams->sym ? 0 : -1;
617}
618
619static size_t maps__fprintf(struct maps *maps, FILE *fp)
620{
621 size_t printed = 0;
622 struct rb_node *nd;
623
624 pthread_rwlock_rdlock(&maps->lock);
625
626 for (nd = rb_first(&maps->entries); nd; nd = rb_next(nd)) {
627 struct map *pos = rb_entry(nd, struct map, rb_node);
628 printed += fprintf(fp, "Map:");
629 printed += map__fprintf(pos, fp);
630 if (verbose > 2) {
631 printed += dso__fprintf(pos->dso, pos->type, fp);
632 printed += fprintf(fp, "--\n");
633 }
634 }
635
636 pthread_rwlock_unlock(&maps->lock);
637
638 return printed;
639}
640
641size_t __map_groups__fprintf_maps(struct map_groups *mg, enum map_type type,
642 FILE *fp)
643{
644 size_t printed = fprintf(fp, "%s:\n", map_type__name[type]);
645 return printed += maps__fprintf(&mg->maps[type], fp);
646}
647
648size_t map_groups__fprintf(struct map_groups *mg, FILE *fp)
649{
650 size_t printed = 0, i;
651 for (i = 0; i < MAP__NR_TYPES; ++i)
652 printed += __map_groups__fprintf_maps(mg, i, fp);
653 return printed;
654}
655
656static void __map_groups__insert(struct map_groups *mg, struct map *map)
657{
658 __maps__insert(&mg->maps[map->type], map);
659 map->groups = mg;
660}
661
662static int maps__fixup_overlappings(struct maps *maps, struct map *map, FILE *fp)
663{
664 struct rb_root *root;
665 struct rb_node *next;
666 int err = 0;
667
668 pthread_rwlock_wrlock(&maps->lock);
669
670 root = &maps->entries;
671 next = rb_first(root);
672
673 while (next) {
674 struct map *pos = rb_entry(next, struct map, rb_node);
675 next = rb_next(&pos->rb_node);
676
677 if (!map__overlap(pos, map))
678 continue;
679
680 if (verbose >= 2) {
681
682 if (use_browser) {
683 pr_warning("overlapping maps in %s "
684 "(disable tui for more info)\n",
685 map->dso->name);
686 } else {
687 fputs("overlapping maps:\n", fp);
688 map__fprintf(map, fp);
689 map__fprintf(pos, fp);
690 }
691 }
692
693 rb_erase_init(&pos->rb_node, root);
694
695
696
697
698 if (map->start > pos->start) {
699 struct map *before = map__clone(pos);
700
701 if (before == NULL) {
702 err = -ENOMEM;
703 goto put_map;
704 }
705
706 before->end = map->start;
707 __map_groups__insert(pos->groups, before);
708 if (verbose >= 2 && !use_browser)
709 map__fprintf(before, fp);
710 map__put(before);
711 }
712
713 if (map->end < pos->end) {
714 struct map *after = map__clone(pos);
715
716 if (after == NULL) {
717 err = -ENOMEM;
718 goto put_map;
719 }
720
721 after->start = map->end;
722 __map_groups__insert(pos->groups, after);
723 if (verbose >= 2 && !use_browser)
724 map__fprintf(after, fp);
725 map__put(after);
726 }
727put_map:
728 map__put(pos);
729
730 if (err)
731 goto out;
732 }
733
734 err = 0;
735out:
736 pthread_rwlock_unlock(&maps->lock);
737 return err;
738}
739
740int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map,
741 FILE *fp)
742{
743 return maps__fixup_overlappings(&mg->maps[map->type], map, fp);
744}
745
746
747
748
749int map_groups__clone(struct thread *thread,
750 struct map_groups *parent, enum map_type type)
751{
752 struct map_groups *mg = thread->mg;
753 int err = -ENOMEM;
754 struct map *map;
755 struct maps *maps = &parent->maps[type];
756
757 pthread_rwlock_rdlock(&maps->lock);
758
759 for (map = maps__first(maps); map; map = map__next(map)) {
760 struct map *new = map__clone(map);
761 if (new == NULL)
762 goto out_unlock;
763
764 err = unwind__prepare_access(thread, new, NULL);
765 if (err)
766 goto out_unlock;
767
768 map_groups__insert(mg, new);
769 map__put(new);
770 }
771
772 err = 0;
773out_unlock:
774 pthread_rwlock_unlock(&maps->lock);
775 return err;
776}
777
778static void __maps__insert(struct maps *maps, struct map *map)
779{
780 struct rb_node **p = &maps->entries.rb_node;
781 struct rb_node *parent = NULL;
782 const u64 ip = map->start;
783 struct map *m;
784
785 while (*p != NULL) {
786 parent = *p;
787 m = rb_entry(parent, struct map, rb_node);
788 if (ip < m->start)
789 p = &(*p)->rb_left;
790 else
791 p = &(*p)->rb_right;
792 }
793
794 rb_link_node(&map->rb_node, parent, p);
795 rb_insert_color(&map->rb_node, &maps->entries);
796 map__get(map);
797}
798
799void maps__insert(struct maps *maps, struct map *map)
800{
801 pthread_rwlock_wrlock(&maps->lock);
802 __maps__insert(maps, map);
803 pthread_rwlock_unlock(&maps->lock);
804}
805
806static void __maps__remove(struct maps *maps, struct map *map)
807{
808 rb_erase_init(&map->rb_node, &maps->entries);
809 map__put(map);
810}
811
812void maps__remove(struct maps *maps, struct map *map)
813{
814 pthread_rwlock_wrlock(&maps->lock);
815 __maps__remove(maps, map);
816 pthread_rwlock_unlock(&maps->lock);
817}
818
819struct map *maps__find(struct maps *maps, u64 ip)
820{
821 struct rb_node **p, *parent = NULL;
822 struct map *m;
823
824 pthread_rwlock_rdlock(&maps->lock);
825
826 p = &maps->entries.rb_node;
827 while (*p != NULL) {
828 parent = *p;
829 m = rb_entry(parent, struct map, rb_node);
830 if (ip < m->start)
831 p = &(*p)->rb_left;
832 else if (ip >= m->end)
833 p = &(*p)->rb_right;
834 else
835 goto out;
836 }
837
838 m = NULL;
839out:
840 pthread_rwlock_unlock(&maps->lock);
841 return m;
842}
843
844struct map *maps__first(struct maps *maps)
845{
846 struct rb_node *first = rb_first(&maps->entries);
847
848 if (first)
849 return rb_entry(first, struct map, rb_node);
850 return NULL;
851}
852
853struct map *map__next(struct map *map)
854{
855 struct rb_node *next = rb_next(&map->rb_node);
856
857 if (next)
858 return rb_entry(next, struct map, rb_node);
859 return NULL;
860}
861
862struct kmap *map__kmap(struct map *map)
863{
864 if (!map->dso || !map->dso->kernel) {
865 pr_err("Internal error: map__kmap with a non-kernel map\n");
866 return NULL;
867 }
868 return (struct kmap *)(map + 1);
869}
870
871struct map_groups *map__kmaps(struct map *map)
872{
873 struct kmap *kmap = map__kmap(map);
874
875 if (!kmap || !kmap->kmaps) {
876 pr_err("Internal error: map__kmaps with a non-kernel map\n");
877 return NULL;
878 }
879 return kmap->kmaps;
880}
881