summaryrefslogtreecommitdiff
path: root/tools/perf/util/srcline.c
blob: cfca03abd6f8d8caea4e418343c6459b8e192fb5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
// SPDX-License-Identifier: GPL-2.0
#include <inttypes.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>

#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/zalloc.h>

#include <api/io.h>

#include "util/dso.h"
#include "util/debug.h"
#include "util/callchain.h"
#include "util/symbol_conf.h"
#include "srcline.h"
#include "string2.h"
#include "symbol.h"
#include "subcmd/run-command.h"

bool srcline_full_filename;

static const char *dso__name(struct dso *dso)
{
	const char *dso_name;

	if (dso->symsrc_filename)
		dso_name = dso->symsrc_filename;
	else
		dso_name = dso->long_name;

	if (dso_name[0] == '[')
		return NULL;

	if (!strncmp(dso_name, "/tmp/perf-", 10))
		return NULL;

	return dso_name;
}

static int inline_list__append(struct symbol *symbol, char *srcline,
			       struct inline_node *node)
{
	struct inline_list *ilist;

	ilist = zalloc(sizeof(*ilist));
	if (ilist == NULL)
		return -1;

	ilist->symbol = symbol;
	ilist->srcline = srcline;

	if (callchain_param.order == ORDER_CALLEE)
		list_add_tail(&ilist->list, &node->val);
	else
		list_add(&ilist->list, &node->val);

	return 0;
}

/* basename version that takes a const input string */
static const char *gnu_basename(const char *path)
{
	const char *base = strrchr(path, '/');

	return base ? base + 1 : path;
}

static char *srcline_from_fileline(const char *file, unsigned int line)
{
	char *srcline;

	if (!file)
		return NULL;

	if (!srcline_full_filename)
		file = gnu_basename(file);

	if (asprintf(&srcline, "%s:%u", file, line) < 0)
		return NULL;

	return srcline;
}

static struct symbol *new_inline_sym(struct dso *dso,
				     struct symbol *base_sym,
				     const char *funcname)
{
	struct symbol *inline_sym;
	char *demangled = NULL;

	if (!funcname)
		funcname = "??";

	if (dso) {
		demangled = dso__demangle_sym(dso, 0, funcname);
		if (demangled)
			funcname = demangled;
	}

	if (base_sym && strcmp(funcname, base_sym->name) == 0) {
		/* reuse the real, existing symbol */
		inline_sym = base_sym;
		/* ensure that we don't alias an inlined symbol, which could
		 * lead to double frees in inline_node__delete
		 */
		assert(!base_sym->inlined);
	} else {
		/* create a fake symbol for the inline frame */
		inline_sym = symbol__new(base_sym ? base_sym->start : 0,
					 base_sym ? (base_sym->end - base_sym->start) : 0,
					 base_sym ? base_sym->binding : 0,
					 base_sym ? base_sym->type : 0,
					 funcname);
		if (inline_sym)
			inline_sym->inlined = 1;
	}

	free(demangled);

	return inline_sym;
}

#define MAX_INLINE_NEST 1024

#ifdef HAVE_LIBBFD_SUPPORT

/*
 * Implement addr2line using libbfd.
 */
#define PACKAGE "perf"
#include <bfd.h>

struct a2l_data {
	const char 	*input;
	u64	 	addr;

	bool 		found;
	const char 	*filename;
	const char 	*funcname;
	unsigned 	line;

	bfd 		*abfd;
	asymbol 	**syms;
};

static int bfd_error(const char *string)
{
	const char *errmsg;

	errmsg = bfd_errmsg(bfd_get_error());
	fflush(stdout);

	if (string)
		pr_debug("%s: %s\n", string, errmsg);
	else
		pr_debug("%s\n", errmsg);

	return -1;
}

static int slurp_symtab(bfd *abfd, struct a2l_data *a2l)
{
	long storage;
	long symcount;
	asymbol **syms;
	bfd_boolean dynamic = FALSE;

	if ((bfd_get_file_flags(abfd) & HAS_SYMS) == 0)
		return bfd_error(bfd_get_filename(abfd));

	storage = bfd_get_symtab_upper_bound(abfd);
	if (storage == 0L) {
		storage = bfd_get_dynamic_symtab_upper_bound(abfd);
		dynamic = TRUE;
	}
	if (storage < 0L)
		return bfd_error(bfd_get_filename(abfd));

	syms = malloc(storage);
	if (dynamic)
		symcount = bfd_canonicalize_dynamic_symtab(abfd, syms);
	else
		symcount = bfd_canonicalize_symtab(abfd, syms);

	if (symcount < 0) {
		free(syms);
		return bfd_error(bfd_get_filename(abfd));
	}

	a2l->syms = syms;
	return 0;
}

static void find_address_in_section(bfd *abfd, asection *section, void *data)
{
	bfd_vma pc, vma;
	bfd_size_type size;
	struct a2l_data *a2l = data;
	flagword flags;

	if (a2l->found)
		return;

#ifdef bfd_get_section_flags
	flags = bfd_get_section_flags(abfd, section);
#else
	flags = bfd_section_flags(section);
#endif
	if ((flags & SEC_ALLOC) == 0)
		return;

	pc = a2l->addr;
#ifdef bfd_get_section_vma
	vma = bfd_get_section_vma(abfd, section);
#else
	vma = bfd_section_vma(section);
#endif
#ifdef bfd_get_section_size
	size = bfd_get_section_size(section);
#else
	size = bfd_section_size(section);
#endif

	if (pc < vma || pc >= vma + size)
		return;

	a2l->found = bfd_find_nearest_line(abfd, section, a2l->syms, pc - vma,
					   &a2l->filename, &a2l->funcname,
					   &a2l->line);

	if (a2l->filename && !strlen(a2l->filename))
		a2l->filename = NULL;
}

static struct a2l_data *addr2line_init(const char *path)
{
	bfd *abfd;
	struct a2l_data *a2l = NULL;

	abfd = bfd_openr(path, NULL);
	if (abfd == NULL)
		return NULL;

	if (!bfd_check_format(abfd, bfd_object))
		goto out;

	a2l = zalloc(sizeof(*a2l));
	if (a2l == NULL)
		goto out;

	a2l->abfd = abfd;
	a2l->input = strdup(path);
	if (a2l->input == NULL)
		goto out;

	if (slurp_symtab(abfd, a2l))
		goto out;

	return a2l;

out:
	if (a2l) {
		zfree((char **)&a2l->input);
		free(a2l);
	}
	bfd_close(abfd);
	return NULL;
}

static void addr2line_cleanup(struct a2l_data *a2l)
{
	if (a2l->abfd)
		bfd_close(a2l->abfd);
	zfree((char **)&a2l->input);
	zfree(&a2l->syms);
	free(a2l);
}

static int inline_list__append_dso_a2l(struct dso *dso,
				       struct inline_node *node,
				       struct symbol *sym)
{
	struct a2l_data *a2l = dso->a2l;
	struct symbol *inline_sym = new_inline_sym(dso, sym, a2l->funcname);
	char *srcline = NULL;

	if (a2l->filename)
		srcline = srcline_from_fileline(a2l->filename, a2l->line);

	return inline_list__append(inline_sym, srcline, node);
}

static int addr2line(const char *dso_name, u64 addr,
		     char **file, unsigned int *line, struct dso *dso,
		     bool unwind_inlines, struct inline_node *node,
		     struct symbol *sym)
{
	int ret = 0;
	struct a2l_data *a2l = dso->a2l;

	if (!a2l) {
		dso->a2l = addr2line_init(dso_name);
		a2l = dso->a2l;
	}

	if (a2l == NULL) {
		if (!symbol_conf.disable_add2line_warn)
			pr_warning("addr2line_init failed for %s\n", dso_name);
		return 0;
	}

	a2l->addr = addr;
	a2l->found = false;

	bfd_map_over_sections(a2l->abfd, find_address_in_section, a2l);

	if (!a2l->found)
		return 0;

	if (unwind_inlines) {
		int cnt = 0;

		if (node && inline_list__append_dso_a2l(dso, node, sym))
			return 0;

		while (bfd_find_inliner_info(a2l->abfd, &a2l->filename,
					     &a2l->funcname, &a2l->line) &&
		       cnt++ < MAX_INLINE_NEST) {

			if (a2l->filename && !strlen(a2l->filename))
				a2l->filename = NULL;

			if (node != NULL) {
				if (inline_list__append_dso_a2l(dso, node, sym))
					return 0;
				// found at least one inline frame
				ret = 1;
			}
		}
	}

	if (file) {
		*file = a2l->filename ? strdup(a2l->filename) : NULL;
		ret = *file ? 1 : 0;
	}

	if (line)
		*line = a2l->line;

	return ret;
}

void dso__free_a2l(struct dso *dso)
{
	struct a2l_data *a2l = dso->a2l;

	if (!a2l)
		return;

	addr2line_cleanup(a2l);

	dso->a2l = NULL;
}

#else /* HAVE_LIBBFD_SUPPORT */

static int filename_split(char *filename, unsigned int *line_nr)
{
	char *sep;

	sep = strchr(filename, '\n');
	if (sep)
		*sep = '\0';

	if (!strcmp(filename, "??:0"))
		return 0;

	sep = strchr(filename, ':');
	if (sep) {
		*sep++ = '\0';
		*line_nr = strtoul(sep, NULL, 0);
		return 1;
	}

	return 0;
}

static void addr2line_subprocess_cleanup(struct child_process *a2l)
{
	if (a2l->pid != -1) {
		kill(a2l->pid, SIGKILL);
		finish_command(a2l); /* ignore result, we don't care */
		a2l->pid = -1;
	}

	free(a2l);
}

static struct child_process *addr2line_subprocess_init(const char *addr2line_path,
							const char *binary_path)
{
	const char *argv[] = {
		addr2line_path ?: "addr2line",
		"-e", binary_path,
		"-i", "-f", NULL
	};
	struct child_process *a2l = zalloc(sizeof(*a2l));
	int start_command_status = 0;

	if (a2l == NULL) {
		pr_err("Failed to allocate memory for addr2line");
		return NULL;
	}

	a2l->pid = -1;
	a2l->in = -1;
	a2l->out = -1;
	a2l->no_stderr = 1;

	a2l->argv = argv;
	start_command_status = start_command(a2l);
	a2l->argv = NULL; /* it's not used after start_command; avoid dangling pointers */

	if (start_command_status != 0) {
		pr_warning("could not start addr2line (%s) for %s: start_command return code %d\n",
			addr2line_path, binary_path, start_command_status);
		addr2line_subprocess_cleanup(a2l);
		return NULL;
	}

	return a2l;
}

enum a2l_style {
	BROKEN,
	GNU_BINUTILS,
	LLVM,
};

static enum a2l_style addr2line_configure(struct child_process *a2l)
{
	static bool cached;
	static enum a2l_style style;

	if (!cached) {
		char buf[128];
		struct io io;
		int ch;

		if (write(a2l->in, ",\n", 2) != 2)
			return BROKEN;

		io__init(&io, a2l->out, buf, sizeof(buf));
		ch = io__get_char(&io);
		if (ch == ',') {
			style = LLVM;
			cached = true;
		} else if (ch == '?') {
			style = GNU_BINUTILS;
			cached = true;
		} else {
			style = BROKEN;
		}
		do {
			ch = io__get_char(&io);
		} while (ch > 0 && ch != '\n');
		if (style == GNU_BINUTILS) {
			do {
				ch = io__get_char(&io);
			} while (ch > 0 && ch != '\n');
		}
		/* Ignore SIGPIPE in the event addr2line exits. */
		signal(SIGPIPE, SIG_IGN);
	}
	return style;
}

static int read_addr2line_record(struct io *io,
				 enum a2l_style style,
				 char **function,
				 char **filename,
				 unsigned int *line_nr)
{
	/*
	 * Returns:
	 * -1 ==> error
	 * 0 ==> sentinel (or other ill-formed) record read
	 * 1 ==> a genuine record read
	 */
	char *line = NULL;
	size_t line_len = 0;
	unsigned int dummy_line_nr = 0;
	int ret = -1;

	if (function != NULL)
		zfree(function);

	if (filename != NULL)
		zfree(filename);

	if (line_nr != NULL)
		*line_nr = 0;

	if (io__getline(io, &line, &line_len) < 0 || !line_len)
		goto error;

	if (style == LLVM && line_len == 2 && line[0] == ',') {
		zfree(&line);
		return 0;
	}

	if (function != NULL)
		*function = strdup(strim(line));

	zfree(&line);
	line_len = 0;

	if (io__getline(io, &line, &line_len) < 0 || !line_len)
		goto error;

	if (filename_split(line, line_nr == NULL ? &dummy_line_nr : line_nr) == 0 &&
	    style == GNU_BINUTILS) {
		ret = 0;
		goto error;
	}

	if (filename != NULL)
		*filename = strdup(line);

	zfree(&line);
	line_len = 0;

	return 1;

error:
	free(line);
	if (function != NULL)
		zfree(function);
	if (filename != NULL)
		zfree(filename);
	return ret;
}

static int inline_list__append_record(struct dso *dso,
				      struct inline_node *node,
				      struct symbol *sym,
				      const char *function,
				      const char *filename,
				      unsigned int line_nr)
{
	struct symbol *inline_sym = new_inline_sym(dso, sym, function);

	return inline_list__append(inline_sym, srcline_from_fileline(filename, line_nr), node);
}

static int addr2line(const char *dso_name, u64 addr,
		     char **file, unsigned int *line_nr,
		     struct dso *dso,
		     bool unwind_inlines,
		     struct inline_node *node,
		     struct symbol *sym __maybe_unused)
{
	struct child_process *a2l = dso->a2l;
	char *record_function = NULL;
	char *record_filename = NULL;
	unsigned int record_line_nr = 0;
	int record_status = -1;
	int ret = 0;
	size_t inline_count = 0;
	int len;
	char buf[128];
	ssize_t written;
	struct io io;
	enum a2l_style a2l_style;

	if (!a2l) {
		if (!filename__has_section(dso_name, ".debug_line"))
			goto out;

		dso->a2l = addr2line_subprocess_init(symbol_conf.addr2line_path,
						     dso_name);
		a2l = dso->a2l;
	}

	if (a2l == NULL) {
		if (!symbol_conf.disable_add2line_warn)
			pr_warning("%s %s: addr2line_subprocess_init failed\n", __func__, dso_name);
		goto out;
	}
	a2l_style = addr2line_configure(a2l);
	if (a2l_style == BROKEN) {
		if (!symbol_conf.disable_add2line_warn)
			pr_warning("%s: addr2line configuration failed\n", __func__);
		goto out;
	}

	/*
	 * Send our request and then *deliberately* send something that can't be interpreted as
	 * a valid address to ask addr2line about (namely, ","). This causes addr2line to first
	 * write out the answer to our request, in an unbounded/unknown number of records, and
	 * then to write out the lines "??" and "??:0", for GNU binutils, or "," for
	 * llvm-addr2line, so that we can detect when it has finished giving us anything
	 * useful. With GNU binutils, we have to be careful about the first record, though,
	 * because it may be genuinely unknown, in which case we'll get two sets of "??"/"??:0"
	 * lines.
	 */
	len = snprintf(buf, sizeof(buf), "%016"PRIx64"\n,\n", addr);
	written = len > 0 ? write(a2l->in, buf, len) : -1;
	if (written != len) {
		if (!symbol_conf.disable_add2line_warn)
			pr_warning("%s %s: could not send request\n", __func__, dso_name);
		goto out;
	}
	io__init(&io, a2l->out, buf, sizeof(buf));

	switch (read_addr2line_record(&io, a2l_style,
				      &record_function, &record_filename, &record_line_nr)) {
	case -1:
		if (!symbol_conf.disable_add2line_warn)
			pr_warning("%s %s: could not read first record\n", __func__, dso_name);
		goto out;
	case 0:
		/*
		 * The first record was invalid, so return failure, but first read another
		 * record, since we asked a junk question and have to clear the answer out.
		 */
		switch (read_addr2line_record(&io, a2l_style, NULL, NULL, NULL)) {
		case -1:
			if (!symbol_conf.disable_add2line_warn)
				pr_warning("%s %s: could not read delimiter record\n",
					   __func__, dso_name);
			break;
		case 0:
			/* As expected. */
			break;
		default:
			if (!symbol_conf.disable_add2line_warn)
				pr_warning("%s %s: unexpected record instead of sentinel",
					   __func__, dso_name);
			break;
		}
		goto out;
	default:
		break;
	}

	if (file) {
		*file = strdup(record_filename);
		ret = 1;
	}
	if (line_nr)
		*line_nr = record_line_nr;

	if (unwind_inlines) {
		if (node && inline_list__append_record(dso, node, sym,
						       record_function,
						       record_filename,
						       record_line_nr)) {
			ret = 0;
			goto out;
		}
	}

	/* We have to read the records even if we don't care about the inline info. */
	while ((record_status = read_addr2line_record(&io,
						      a2l_style,
						      &record_function,
						      &record_filename,
						      &record_line_nr)) == 1) {
		if (unwind_inlines && node && inline_count++ < MAX_INLINE_NEST) {
			if (inline_list__append_record(dso, node, sym,
						       record_function,
						       record_filename,
						       record_line_nr)) {
				ret = 0;
				goto out;
			}
			ret = 1; /* found at least one inline frame */
		}
	}

out:
	free(record_function);
	free(record_filename);
	return ret;
}

void dso__free_a2l(struct dso *dso)
{
	struct child_process *a2l = dso->a2l;

	if (!a2l)
		return;

	addr2line_subprocess_cleanup(a2l);

	dso->a2l = NULL;
}

#endif /* HAVE_LIBBFD_SUPPORT */

static struct inline_node *addr2inlines(const char *dso_name, u64 addr,
					struct dso *dso, struct symbol *sym)
{
	struct inline_node *node;

	node = zalloc(sizeof(*node));
	if (node == NULL) {
		perror("not enough memory for the inline node");
		return NULL;
	}

	INIT_LIST_HEAD(&node->val);
	node->addr = addr;

	addr2line(dso_name, addr, NULL, NULL, dso, true, node, sym);
	return node;
}

/*
 * Number of addr2line failures (without success) before disabling it for that
 * dso.
 */
#define A2L_FAIL_LIMIT 123

char *__get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
		  bool show_sym, bool show_addr, bool unwind_inlines,
		  u64 ip)
{
	char *file = NULL;
	unsigned line = 0;
	char *srcline;
	const char *dso_name;

	if (!dso->has_srcline)
		goto out;

	dso_name = dso__name(dso);
	if (dso_name == NULL)
		goto out;

	if (!addr2line(dso_name, addr, &file, &line, dso,
		       unwind_inlines, NULL, sym))
		goto out;

	srcline = srcline_from_fileline(file, line);
	free(file);

	if (!srcline)
		goto out;

	dso->a2l_fails = 0;

	return srcline;

out:
	if (dso->a2l_fails && ++dso->a2l_fails > A2L_FAIL_LIMIT) {
		dso->has_srcline = 0;
		dso__free_a2l(dso);
	}

	if (!show_addr)
		return (show_sym && sym) ?
			    strndup(sym->name, sym->namelen) : SRCLINE_UNKNOWN;

	if (sym) {
		if (asprintf(&srcline, "%s+%" PRIu64, show_sym ? sym->name : "",
					ip - sym->start) < 0)
			return SRCLINE_UNKNOWN;
	} else if (asprintf(&srcline, "%s[%" PRIx64 "]", dso->short_name, addr) < 0)
		return SRCLINE_UNKNOWN;
	return srcline;
}

/* Returns filename and fills in line number in line */
char *get_srcline_split(struct dso *dso, u64 addr, unsigned *line)
{
	char *file = NULL;
	const char *dso_name;

	if (!dso->has_srcline)
		goto out;

	dso_name = dso__name(dso);
	if (dso_name == NULL)
		goto out;

	if (!addr2line(dso_name, addr, &file, line, dso, true, NULL, NULL))
		goto out;

	dso->a2l_fails = 0;
	return file;

out:
	if (dso->a2l_fails && ++dso->a2l_fails > A2L_FAIL_LIMIT) {
		dso->has_srcline = 0;
		dso__free_a2l(dso);
	}

	return NULL;
}

void free_srcline(char *srcline)
{
	if (srcline && strcmp(srcline, SRCLINE_UNKNOWN) != 0)
		free(srcline);
}

char *get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
		  bool show_sym, bool show_addr, u64 ip)
{
	return __get_srcline(dso, addr, sym, show_sym, show_addr, false, ip);
}

struct srcline_node {
	u64			addr;
	char			*srcline;
	struct rb_node		rb_node;
};

void srcline__tree_insert(struct rb_root_cached *tree, u64 addr, char *srcline)
{
	struct rb_node **p = &tree->rb_root.rb_node;
	struct rb_node *parent = NULL;
	struct srcline_node *i, *node;
	bool leftmost = true;

	node = zalloc(sizeof(struct srcline_node));
	if (!node) {
		perror("not enough memory for the srcline node");
		return;
	}

	node->addr = addr;
	node->srcline = srcline;

	while (*p != NULL) {
		parent = *p;
		i = rb_entry(parent, struct srcline_node, rb_node);
		if (addr < i->addr)
			p = &(*p)->rb_left;
		else {
			p = &(*p)->rb_right;
			leftmost = false;
		}
	}
	rb_link_node(&node->rb_node, parent, p);
	rb_insert_color_cached(&node->rb_node, tree, leftmost);
}

char *srcline__tree_find(struct rb_root_cached *tree, u64 addr)
{
	struct rb_node *n = tree->rb_root.rb_node;

	while (n) {
		struct srcline_node *i = rb_entry(n, struct srcline_node,
						  rb_node);

		if (addr < i->addr)
			n = n->rb_left;
		else if (addr > i->addr)
			n = n->rb_right;
		else
			return i->srcline;
	}

	return NULL;
}

void srcline__tree_delete(struct rb_root_cached *tree)
{
	struct srcline_node *pos;
	struct rb_node *next = rb_first_cached(tree);

	while (next) {
		pos = rb_entry(next, struct srcline_node, rb_node);
		next = rb_next(&pos->rb_node);
		rb_erase_cached(&pos->rb_node, tree);
		free_srcline(pos->srcline);
		zfree(&pos);
	}
}

struct inline_node *dso__parse_addr_inlines(struct dso *dso, u64 addr,
					    struct symbol *sym)
{
	const char *dso_name;

	dso_name = dso__name(dso);
	if (dso_name == NULL)
		return NULL;

	return addr2inlines(dso_name, addr, dso, sym);
}

void inline_node__delete(struct inline_node *node)
{
	struct inline_list *ilist, *tmp;

	list_for_each_entry_safe(ilist, tmp, &node->val, list) {
		list_del_init(&ilist->list);
		free_srcline(ilist->srcline);
		/* only the inlined symbols are owned by the list */
		if (ilist->symbol && ilist->symbol->inlined)
			symbol__delete(ilist->symbol);
		free(ilist);
	}

	free(node);
}

void inlines__tree_insert(struct rb_root_cached *tree,
			  struct inline_node *inlines)
{
	struct rb_node **p = &tree->rb_root.rb_node;
	struct rb_node *parent = NULL;
	const u64 addr = inlines->addr;
	struct inline_node *i;
	bool leftmost = true;

	while (*p != NULL) {
		parent = *p;
		i = rb_entry(parent, struct inline_node, rb_node);
		if (addr < i->addr)
			p = &(*p)->rb_left;
		else {
			p = &(*p)->rb_right;
			leftmost = false;
		}
	}
	rb_link_node(&inlines->rb_node, parent, p);
	rb_insert_color_cached(&inlines->rb_node, tree, leftmost);
}

struct inline_node *inlines__tree_find(struct rb_root_cached *tree, u64 addr)
{
	struct rb_node *n = tree->rb_root.rb_node;

	while (n) {
		struct inline_node *i = rb_entry(n, struct inline_node,
						 rb_node);

		if (addr < i->addr)
			n = n->rb_left;
		else if (addr > i->addr)
			n = n->rb_right;
		else
			return i;
	}

	return NULL;
}

void inlines__tree_delete(struct rb_root_cached *tree)
{
	struct inline_node *pos;
	struct rb_node *next = rb_first_cached(tree);

	while (next) {
		pos = rb_entry(next, struct inline_node, rb_node);
		next = rb_next(&pos->rb_node);
		rb_erase_cached(&pos->rb_node, tree);
		inline_node__delete(pos);
	}
}