forked from ~ljy/RK356X_SDK_RELEASE
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2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f 
 kernel/tools/perf/util/map.c
....@@ -9,39 +9,28 @@
99 #include <stdio.h>
1010 #include <unistd.h>
1111 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
12
+#include "dso.h"
1213 #include "map.h"
14
+#include "map_symbol.h"
1315 #include "thread.h"
1416 #include "vdso.h"
1517 #include "build-id.h"
16
-#include "util.h"
1718 #include "debug.h"
1819 #include "machine.h"
1920 #include <linux/string.h>
21
+#include <linux/zalloc.h>
2022 #include "srcline.h"
2123 #include "namespaces.h"
2224 #include "unwind.h"
25
+#include "srccode.h"
26
+#include "ui/ui.h"
2327 
2428 static void __maps__insert(struct maps *maps, struct map *map);
2529 
26
-static inline int is_anon_memory(const char *filename, u32 flags)
27
-{
28
-	return flags & MAP_HUGETLB ||
29
-	       !strcmp(filename, "//anon") ||
30
-	       !strncmp(filename, "/dev/zero", sizeof("/dev/zero") - 1) ||
31
-	       !strncmp(filename, "/anon_hugepage", sizeof("/anon_hugepage") - 1);
32
-}
33
-
34
-static inline int is_no_dso_memory(const char *filename)
35
-{
36
-	return !strncmp(filename, "[stack", 6) ||
37
-	       !strncmp(filename, "/SYSV",5)   ||
38
-	       !strcmp(filename, "[heap]");
39
-}
40
-
4130 static inline int is_android_lib(const char *filename)
4231 {
43
-	return !strncmp(filename, "/data/app-lib", 13) ||
44
-	       !strncmp(filename, "/system/lib", 11);
32
+	return strstarts(filename, "/data/app-lib/") ||
33
+	       strstarts(filename, "/system/lib/");
4534 }
4635 
4736 static inline bool replace_android_lib(const char *filename, char *newfilename)
....@@ -61,7 +50,7 @@
6150 
6251 	app_abi_length = strlen(app_abi);
6352 
64
-	if (!strncmp(filename, "/data/app-lib", 13)) {
53
+	if (strstarts(filename, "/data/app-lib/")) {
6554 		char *apk_path;
6655 
6756 		if (!app_abi_length)
....@@ -85,7 +74,7 @@
8574 		return true;
8675 	}
8776 
88
-	if (!strncmp(filename, "/system/lib/", 12)) {
77
+	if (strstarts(filename, "/system/lib/")) {
8978 		char *ndk, *app;
9079 		const char *arch;
9180 		int ndk_length, app_length;
....@@ -134,14 +123,13 @@
134123 	map->map_ip   = map__map_ip;
135124 	map->unmap_ip = map__unmap_ip;
136125 	RB_CLEAR_NODE(&map->rb_node);
137
-	map->groups   = NULL;
138126 	map->erange_warned = false;
139127 	refcount_set(&map->refcnt, 1);
140128 }
141129 
142130 struct map *map__new(struct machine *machine, u64 start, u64 len,
143
-		     u64 pgoff, u32 d_maj, u32 d_min, u64 ino,
144
-		     u64 ino_gen, u32 prot, u32 flags, char *filename,
131
+		     u64 pgoff, struct dso_id *id,
132
+		     u32 prot, u32 flags, char *filename,
145133 		     struct thread *thread)
146134 {
147135 	struct map *map = malloc(sizeof(*map));
....@@ -154,14 +142,9 @@
154142 		int anon, no_dso, vdso, android;
155143 
156144 		android = is_android_lib(filename);
157
-		anon = is_anon_memory(filename, flags);
145
+		anon = is_anon_memory(filename) || flags & MAP_HUGETLB;
158146 		vdso = is_vdso_map(filename);
159147 		no_dso = is_no_dso_memory(filename);
160
-
161
-		map->maj = d_maj;
162
-		map->min = d_min;
163
-		map->ino = ino;
164
-		map->ino_generation = ino_gen;
165148 		map->prot = prot;
166149 		map->flags = flags;
167150 		nsi = nsinfo__get(thread->nsinfo);
....@@ -191,7 +174,7 @@
191174 			pgoff = 0;
192175 			dso = machine__findnew_vdso(machine, thread);
193176 		} else
194
-			dso = machine__findnew_dso(machine, filename);
177
+			dso = machine__findnew_dso_id(machine, filename, id);
195178 
196179 		if (dso == NULL)
197180 			goto out_delete;
....@@ -238,18 +221,11 @@
238221 	return map;
239222 }
240223 
241
-/*
242
- * Use this and __map__is_kmodule() for map instances that are in
243
- * machine->kmaps, and thus have map->groups->machine all properly set, to
244
- * disambiguate between the kernel and modules.
245
- *
246
- * When the need arises, introduce map__is_{kernel,kmodule)() that
247
- * checks (map->groups != NULL && map->groups->machine != NULL &&
248
- * map->dso->kernel) before calling __map__is_{kernel,kmodule}())
249
- */
250224 bool __map__is_kernel(const struct map *map)
251225 {
252
-	return machine__kernel_map(map->groups->machine) == map;
226
+	if (!map->dso->kernel)
227
+		return false;
228
+	return machine__kernel_map(map__kmaps((struct map *)map)->machine) == map;
253229 }
254230 
255231 bool __map__is_extra_kernel_map(const struct map *map)
....@@ -259,6 +235,43 @@
259235 	return kmap && kmap->name[0];
260236 }
261237 
238
+bool __map__is_bpf_prog(const struct map *map)
239
+{
240
+	const char *name;
241
+
242
+	if (map->dso->binary_type == DSO_BINARY_TYPE__BPF_PROG_INFO)
243
+		return true;
244
+
245
+	/*
246
+	 * If PERF_RECORD_BPF_EVENT is not included, the dso will not have
247
+	 * type of DSO_BINARY_TYPE__BPF_PROG_INFO. In such cases, we can
248
+	 * guess the type based on name.
249
+	 */
250
+	name = map->dso->short_name;
251
+	return name && (strstr(name, "bpf_prog_") == name);
252
+}
253
+
254
+bool __map__is_bpf_image(const struct map *map)
255
+{
256
+	const char *name;
257
+
258
+	if (map->dso->binary_type == DSO_BINARY_TYPE__BPF_IMAGE)
259
+		return true;
260
+
261
+	/*
262
+	 * If PERF_RECORD_KSYMBOL is not included, the dso will not have
263
+	 * type of DSO_BINARY_TYPE__BPF_IMAGE. In such cases, we can
264
+	 * guess the type based on name.
265
+	 */
266
+	name = map->dso->short_name;
267
+	return name && is_bpf_image(name);
268
+}
269
+
270
+bool __map__is_ool(const struct map *map)
271
+{
272
+	return map->dso && map->dso->binary_type == DSO_BINARY_TYPE__OOL;
273
+}
274
+
262275 bool map__has_symbols(const struct map *map)
263276 {
264277 	return dso__has_symbols(map->dso);
....@@ -266,7 +279,7 @@
266279 
267280 static void map__exit(struct map *map)
268281 {
269
-	BUG_ON(!RB_EMPTY_NODE(&map->rb_node));
282
+	BUG_ON(refcount_read(&map->refcnt) != 0);
270283 	dso__zput(map->dso);
271284 }
272285 
....@@ -284,8 +297,8 @@
284297 
285298 void map__fixup_start(struct map *map)
286299 {
287
-	struct rb_root *symbols = &map->dso->symbols;
288
-	struct rb_node *nd = rb_first(symbols);
300
+	struct rb_root_cached *symbols = &map->dso->symbols;
301
+	struct rb_node *nd = rb_first_cached(symbols);
289302 	if (nd != NULL) {
290303 		struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
291304 		map->start = sym->start;
....@@ -294,8 +307,8 @@
294307 
295308 void map__fixup_end(struct map *map)
296309 {
297
-	struct rb_root *symbols = &map->dso->symbols;
298
-	struct rb_node *nd = rb_last(symbols);
310
+	struct rb_root_cached *symbols = &map->dso->symbols;
311
+	struct rb_node *nd = rb_last(&symbols->rb_root);
299312 	if (nd != NULL) {
300313 		struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
301314 		map->end = sym->end;
....@@ -317,15 +330,12 @@
317330 		if (map->dso->has_build_id) {
318331 			char sbuild_id[SBUILD_ID_SIZE];
319332 
320
-			build_id__sprintf(map->dso->build_id,
321
-					  sizeof(map->dso->build_id),
322
-					  sbuild_id);
323
-			pr_warning("%s with build id %s not found",
324
-				   name, sbuild_id);
333
+			build_id__sprintf(&map->dso->bid, sbuild_id);
334
+			pr_debug("%s with build id %s not found", name, sbuild_id);
325335 		} else
326
-			pr_warning("Failed to open %s", name);
336
+			pr_debug("Failed to open %s", name);
327337 
328
-		pr_warning(", continuing without symbols\n");
338
+		pr_debug(", continuing without symbols\n");
329339 		return -1;
330340 	} else if (nr == 0) {
331341 #ifdef HAVE_LIBELF_SUPPORT
....@@ -334,12 +344,11 @@
334344 
335345 		if (len > sizeof(DSO__DELETED) &&
336346 		    strcmp(name + real_len + 1, DSO__DELETED) == 0) {
337
-			pr_warning("%.*s was updated (is prelink enabled?). "
347
+			pr_debug("%.*s was updated (is prelink enabled?). "
338348 				"Restart the long running apps that use it!\n",
339349 				   (int)real_len, name);
340350 		} else {
341
-			pr_warning("no symbols found in %s, maybe install "
342
-				   "a debug package?\n", name);
351
+			pr_debug("no symbols found in %s, maybe install a debug package?\n", name);
343352 		}
344353 #endif
345354 		return -1;
....@@ -369,13 +378,17 @@
369378 
370379 struct map *map__clone(struct map *from)
371380 {
372
-	struct map *map = memdup(from, sizeof(*map));
381
+	size_t size = sizeof(struct map);
382
+	struct map *map;
373383 
384
+	if (from->dso && from->dso->kernel)
385
+		size += sizeof(struct kmap);
386
+
387
+	map = memdup(from, size);
374388 	if (map != NULL) {
375389 		refcount_set(&map->refcnt, 1);
376390 		RB_CLEAR_NODE(&map->rb_node);
377391 		dso__get(map->dso);
378
-		map->groups = NULL;
379392 	}
380393 
381394 	return map;
....@@ -389,6 +402,7 @@
389402 
390403 size_t map__fprintf_dsoname(struct map *map, FILE *fp)
391404 {
405
+	char buf[symbol_conf.pad_output_len_dso + 1];
392406 	const char *dsoname = "[unknown]";
393407 
394408 	if (map && map->dso) {
....@@ -396,6 +410,11 @@
396410 			dsoname = map->dso->long_name;
397411 		else
398412 			dsoname = map->dso->name;
413
+	}
414
+
415
+	if (symbol_conf.pad_output_len_dso) {
416
+		scnprintf_pad(buf, symbol_conf.pad_output_len_dso, "%s", dsoname);
417
+		dsoname = buf;
399418 	}
400419 
401420 	return fprintf(fp, "%s", dsoname);
....@@ -415,11 +434,17 @@
415434 
416435 	if (map && map->dso) {
417436 		char *srcline = map__srcline(map, addr, NULL);
418
-		if (srcline != SRCLINE_UNKNOWN)
437
+		if (strncmp(srcline, SRCLINE_UNKNOWN, strlen(SRCLINE_UNKNOWN)) != 0)
419438 			ret = fprintf(fp, "%s%s", prefix, srcline);
420439 		free_srcline(srcline);
421440 	}
422441 	return ret;
442
+}
443
+
444
+void srccode_state_free(struct srccode_state *state)
445
+{
446
+	zfree(&state->srcfile);
447
+	state->line = 0;
423448 }
424449 
425450 /**
....@@ -459,7 +484,7 @@
459484 	 * kernel modules also have DSO_TYPE_USER in dso->kernel,
460485 	 * but all kernel modules are ET_REL, so won't get here.
461486 	 */
462
-	if (map->dso->kernel == DSO_TYPE_USER)
487
+	if (map->dso->kernel == DSO_SPACE__USER)
463488 		return rip + map->dso->text_offset;
464489 
465490 	return map->unmap_ip(map, rip) - map->reloc;
....@@ -489,82 +514,139 @@
489514 	 * kernel modules also have DSO_TYPE_USER in dso->kernel,
490515 	 * but all kernel modules are ET_REL, so won't get here.
491516 	 */
492
-	if (map->dso->kernel == DSO_TYPE_USER)
517
+	if (map->dso->kernel == DSO_SPACE__USER)
493518 		return map->unmap_ip(map, ip - map->dso->text_offset);
494519 
495520 	return ip + map->reloc;
496521 }
497522 
498
-static void maps__init(struct maps *maps)
523
+void maps__init(struct maps *maps, struct machine *machine)
499524 {
500525 	maps->entries = RB_ROOT;
501526 	init_rwsem(&maps->lock);
527
+	maps->machine = machine;
528
+	maps->last_search_by_name = NULL;
529
+	maps->nr_maps = 0;
530
+	maps->maps_by_name = NULL;
531
+	refcount_set(&maps->refcnt, 1);
502532 }
503533 
504
-void map_groups__init(struct map_groups *mg, struct machine *machine)
534
+static void __maps__free_maps_by_name(struct maps *maps)
505535 {
506
-	maps__init(&mg->maps);
507
-	mg->machine = machine;
508
-	refcount_set(&mg->refcnt, 1);
536
+	/*
537
+	 * Free everything to try to do it from the rbtree in the next search
538
+	 */
539
+	zfree(&maps->maps_by_name);
540
+	maps->nr_maps_allocated = 0;
541
+}
542
+
543
+void maps__insert(struct maps *maps, struct map *map)
544
+{
545
+	down_write(&maps->lock);
546
+	__maps__insert(maps, map);
547
+	++maps->nr_maps;
548
+
549
+	if (map->dso && map->dso->kernel) {
550
+		struct kmap *kmap = map__kmap(map);
551
+
552
+		if (kmap)
553
+			kmap->kmaps = maps;
554
+		else
555
+			pr_err("Internal error: kernel dso with non kernel map\n");
556
+	}
557
+
558
+
559
+	/*
560
+	 * If we already performed some search by name, then we need to add the just
561
+	 * inserted map and resort.
562
+	 */
563
+	if (maps->maps_by_name) {
564
+		if (maps->nr_maps > maps->nr_maps_allocated) {
565
+			int nr_allocate = maps->nr_maps * 2;
566
+			struct map **maps_by_name = realloc(maps->maps_by_name, nr_allocate * sizeof(map));
567
+
568
+			if (maps_by_name == NULL) {
569
+				__maps__free_maps_by_name(maps);
570
+				up_write(&maps->lock);
571
+				return;
572
+			}
573
+
574
+			maps->maps_by_name = maps_by_name;
575
+			maps->nr_maps_allocated = nr_allocate;
576
+		}
577
+		maps->maps_by_name[maps->nr_maps - 1] = map;
578
+		__maps__sort_by_name(maps);
579
+	}
580
+	up_write(&maps->lock);
581
+}
582
+
583
+static void __maps__remove(struct maps *maps, struct map *map)
584
+{
585
+	rb_erase_init(&map->rb_node, &maps->entries);
586
+	map__put(map);
587
+}
588
+
589
+void maps__remove(struct maps *maps, struct map *map)
590
+{
591
+	down_write(&maps->lock);
592
+	if (maps->last_search_by_name == map)
593
+		maps->last_search_by_name = NULL;
594
+
595
+	__maps__remove(maps, map);
596
+	--maps->nr_maps;
597
+	if (maps->maps_by_name)
598
+		__maps__free_maps_by_name(maps);
599
+	up_write(&maps->lock);
509600 }
510601 
511602 static void __maps__purge(struct maps *maps)
512603 {
513
-	struct rb_root *root = &maps->entries;
514
-	struct rb_node *next = rb_first(root);
604
+	struct map *pos, *next;
515605 
516
-	while (next) {
517
-		struct map *pos = rb_entry(next, struct map, rb_node);
518
-
519
-		next = rb_next(&pos->rb_node);
520
-		rb_erase_init(&pos->rb_node, root);
606
+	maps__for_each_entry_safe(maps, pos, next) {
607
+		rb_erase_init(&pos->rb_node,  &maps->entries);
521608 		map__put(pos);
522609 	}
523610 }
524611 
525
-static void maps__exit(struct maps *maps)
612
+void maps__exit(struct maps *maps)
526613 {
527614 	down_write(&maps->lock);
528615 	__maps__purge(maps);
529616 	up_write(&maps->lock);
530617 }
531618 
532
-void map_groups__exit(struct map_groups *mg)
619
+bool maps__empty(struct maps *maps)
533620 {
534
-	maps__exit(&mg->maps);
621
+	return !maps__first(maps);
535622 }
536623 
537
-bool map_groups__empty(struct map_groups *mg)
624
+struct maps *maps__new(struct machine *machine)
538625 {
539
-	return !maps__first(&mg->maps);
626
+	struct maps *maps = zalloc(sizeof(*maps));
627
+
628
+	if (maps != NULL)
629
+		maps__init(maps, machine);
630
+
631
+	return maps;
540632 }
541633 
542
-struct map_groups *map_groups__new(struct machine *machine)
634
+void maps__delete(struct maps *maps)
543635 {
544
-	struct map_groups *mg = malloc(sizeof(*mg));
545
-
546
-	if (mg != NULL)
547
-		map_groups__init(mg, machine);
548
-
549
-	return mg;
636
+	maps__exit(maps);
637
+	unwind__finish_access(maps);
638
+	free(maps);
550639 }
551640 
552
-void map_groups__delete(struct map_groups *mg)
641
+void maps__put(struct maps *maps)
553642 {
554
-	map_groups__exit(mg);
555
-	free(mg);
643
+	if (maps && refcount_dec_and_test(&maps->refcnt))
644
+		maps__delete(maps);
556645 }
557646 
558
-void map_groups__put(struct map_groups *mg)
647
+struct symbol *maps__find_symbol(struct maps *maps, u64 addr, struct map **mapp)
559648 {
560
-	if (mg && refcount_dec_and_test(&mg->refcnt))
561
-		map_groups__delete(mg);
562
-}
563
-
564
-struct symbol *map_groups__find_symbol(struct map_groups *mg,
565
-				       u64 addr, struct map **mapp)
566
-{
567
-	struct map *map = map_groups__find(mg, addr);
649
+	struct map *map = maps__find(maps, addr);
568650 
569651 	/* Ensure map is loaded before using map->map_ip */
570652 	if (map != NULL && map__load(map) >= 0) {
....@@ -583,17 +665,14 @@
583665 	return ip >= map->start && ip < map->end;
584666 }
585667 
586
-struct symbol *maps__find_symbol_by_name(struct maps *maps, const char *name,
587
-					 struct map **mapp)
668
+struct symbol *maps__find_symbol_by_name(struct maps *maps, const char *name, struct map **mapp)
588669 {
589670 	struct symbol *sym;
590
-	struct rb_node *nd;
671
+	struct map *pos;
591672 
592673 	down_read(&maps->lock);
593674 
594
-	for (nd = rb_first(&maps->entries); nd; nd = rb_next(nd)) {
595
-		struct map *pos = rb_entry(nd, struct map, rb_node);
596
-
675
+	maps__for_each_entry(maps, pos) {
597676 		sym = map__find_symbol_by_name(pos, name);
598677 
599678 		if (sym == NULL)
....@@ -613,38 +692,30 @@
613692 	return sym;
614693 }
615694 
616
-struct symbol *map_groups__find_symbol_by_name(struct map_groups *mg,
617
-					       const char *name,
618
-					       struct map **mapp)
695
+int maps__find_ams(struct maps *maps, struct addr_map_symbol *ams)
619696 {
620
-	return maps__find_symbol_by_name(&mg->maps, name, mapp);
621
-}
622
-
623
-int map_groups__find_ams(struct addr_map_symbol *ams)
624
-{
625
-	if (ams->addr < ams->map->start || ams->addr >= ams->map->end) {
626
-		if (ams->map->groups == NULL)
697
+	if (ams->addr < ams->ms.map->start || ams->addr >= ams->ms.map->end) {
698
+		if (maps == NULL)
627699 			return -1;
628
-		ams->map = map_groups__find(ams->map->groups, ams->addr);
629
-		if (ams->map == NULL)
700
+		ams->ms.map = maps__find(maps, ams->addr);
701
+		if (ams->ms.map == NULL)
630702 			return -1;
631703 	}
632704 
633
-	ams->al_addr = ams->map->map_ip(ams->map, ams->addr);
634
-	ams->sym = map__find_symbol(ams->map, ams->al_addr);
705
+	ams->al_addr = ams->ms.map->map_ip(ams->ms.map, ams->addr);
706
+	ams->ms.sym = map__find_symbol(ams->ms.map, ams->al_addr);
635707 
636
-	return ams->sym ? 0 : -1;
708
+	return ams->ms.sym ? 0 : -1;
637709 }
638710 
639
-static size_t maps__fprintf(struct maps *maps, FILE *fp)
711
+size_t maps__fprintf(struct maps *maps, FILE *fp)
640712 {
641713 	size_t printed = 0;
642
-	struct rb_node *nd;
714
+	struct map *pos;
643715 
644716 	down_read(&maps->lock);
645717 
646
-	for (nd = rb_first(&maps->entries); nd; nd = rb_next(nd)) {
647
-		struct map *pos = rb_entry(nd, struct map, rb_node);
718
+	maps__for_each_entry(maps, pos) {
648719 		printed += fprintf(fp, "Map:");
649720 		printed += map__fprintf(pos, fp);
650721 		if (verbose > 2) {
....@@ -658,18 +729,7 @@
658729 	return printed;
659730 }
660731 
661
-size_t map_groups__fprintf(struct map_groups *mg, FILE *fp)
662
-{
663
-	return maps__fprintf(&mg->maps, fp);
664
-}
665
-
666
-static void __map_groups__insert(struct map_groups *mg, struct map *map)
667
-{
668
-	__maps__insert(&mg->maps, map);
669
-	map->groups = mg;
670
-}
671
-
672
-static int maps__fixup_overlappings(struct maps *maps, struct map *map, FILE *fp)
732
+int maps__fixup_overlappings(struct maps *maps, struct map *map, FILE *fp)
673733 {
674734 	struct rb_root *root;
675735 	struct rb_node *next, *first;
....@@ -712,8 +772,7 @@
712772 		if (verbose >= 2) {
713773 
714774 			if (use_browser) {
715
-				pr_warning("overlapping maps in %s "
716
-					   "(disable tui for more info)\n",
775
+				pr_debug("overlapping maps in %s (disable tui for more info)\n",
717776 					   map->dso->name);
718777 			} else {
719778 				fputs("overlapping maps:\n", fp);
....@@ -736,7 +795,7 @@
736795 			}
737796 
738797 			before->end = map->start;
739
-			__map_groups__insert(pos->groups, before);
798
+			__maps__insert(maps, before);
740799 			if (verbose >= 2 && !use_browser)
741800 				map__fprintf(before, fp);
742801 			map__put(before);
....@@ -753,7 +812,7 @@
753812 			after->start = map->end;
754813 			after->pgoff += map->end - pos->start;
755814 			assert(pos->map_ip(pos, map->end) == after->map_ip(after, map->end));
756
-			__map_groups__insert(pos->groups, after);
815
+			__maps__insert(maps, after);
757816 			if (verbose >= 2 && !use_browser)
758817 				map__fprintf(after, fp);
759818 			map__put(after);
....@@ -771,40 +830,36 @@
771830 	return err;
772831 }
773832 
774
-int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map,
775
-				   FILE *fp)
776
-{
777
-	return maps__fixup_overlappings(&mg->maps, map, fp);
778
-}
779
-
780833 /*
781834  * XXX This should not really _copy_ te maps, but refcount them.
782835  */
783
-int map_groups__clone(struct thread *thread, struct map_groups *parent)
836
+int maps__clone(struct thread *thread, struct maps *parent)
784837 {
785
-	struct map_groups *mg = thread->mg;
786
-	int err = -ENOMEM;
838
+	struct maps *maps = thread->maps;
839
+	int err;
787840 	struct map *map;
788
-	struct maps *maps = &parent->maps;
789841 
790
-	down_read(&maps->lock);
842
+	down_read(&parent->lock);
791843 
792
-	for (map = maps__first(maps); map; map = map__next(map)) {
844
+	maps__for_each_entry(parent, map) {
793845 		struct map *new = map__clone(map);
794
-		if (new == NULL)
795
-			goto out_unlock;
796846 
797
-		err = unwind__prepare_access(thread, new, NULL);
847
+		if (new == NULL) {
848
+			err = -ENOMEM;
849
+			goto out_unlock;
850
+		}
851
+
852
+		err = unwind__prepare_access(maps, new, NULL);
798853 		if (err)
799854 			goto out_unlock;
800855 
801
-		map_groups__insert(mg, new);
856
+		maps__insert(maps, new);
802857 		map__put(new);
803858 	}
804859 
805860 	err = 0;
806861 out_unlock:
807
-	up_read(&maps->lock);
862
+	up_read(&parent->lock);
808863 	return err;
809864 }
810865 
....@@ -829,41 +884,20 @@
829884 	map__get(map);
830885 }
831886 
832
-void maps__insert(struct maps *maps, struct map *map)
833
-{
834
-	down_write(&maps->lock);
835
-	__maps__insert(maps, map);
836
-	up_write(&maps->lock);
837
-}
838
-
839
-static void __maps__remove(struct maps *maps, struct map *map)
840
-{
841
-	rb_erase_init(&map->rb_node, &maps->entries);
842
-	map__put(map);
843
-}
844
-
845
-void maps__remove(struct maps *maps, struct map *map)
846
-{
847
-	down_write(&maps->lock);
848
-	__maps__remove(maps, map);
849
-	up_write(&maps->lock);
850
-}
851
-
852887 struct map *maps__find(struct maps *maps, u64 ip)
853888 {
854
-	struct rb_node **p, *parent = NULL;
889
+	struct rb_node *p;
855890 	struct map *m;
856891 
857892 	down_read(&maps->lock);
858893 
859
-	p = &maps->entries.rb_node;
860
-	while (*p != NULL) {
861
-		parent = *p;
862
-		m = rb_entry(parent, struct map, rb_node);
894
+	p = maps->entries.rb_node;
895
+	while (p != NULL) {
896
+		m = rb_entry(p, struct map, rb_node);
863897 		if (ip < m->start)
864
-			p = &(*p)->rb_left;
898
+			p = p->rb_left;
865899 		else if (ip >= m->end)
866
-			p = &(*p)->rb_right;
900
+			p = p->rb_right;
867901 		else
868902 			goto out;
869903 	}
....@@ -883,13 +917,18 @@
883917 	return NULL;
884918 }
885919 
886
-struct map *map__next(struct map *map)
920
+static struct map *__map__next(struct map *map)
887921 {
888922 	struct rb_node *next = rb_next(&map->rb_node);
889923 
890924 	if (next)
891925 		return rb_entry(next, struct map, rb_node);
892926 	return NULL;
927
+}
928
+
929
+struct map *map__next(struct map *map)
930
+{
931
+	return map ? __map__next(map) : NULL;
893932 }
894933 
895934 struct kmap *__map__kmap(struct map *map)
....@@ -908,7 +947,7 @@
908947 	return kmap;
909948 }
910949 
911
-struct map_groups *map__kmaps(struct map *map)
950
+struct maps *map__kmaps(struct map *map)
912951 {
913952 	struct kmap *kmap = map__kmap(map);
914953