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1// SPDX-License-Identifier: GPL-2.0
2#include <inttypes.h>
3#include <signal.h>
4#include <stdio.h>
5#include <stdlib.h>
6#include <string.h>
7#include <sys/types.h>
8
9#include <linux/kernel.h>
10#include <linux/string.h>
11#include <linux/zalloc.h>
12
13#include "util/dso.h"
14#include "util/debug.h"
15#include "util/callchain.h"
16#include "util/symbol_conf.h"
17#include "srcline.h"
18#include "string2.h"
19#include "symbol.h"
20#include "subcmd/run-command.h"
21
22bool srcline_full_filename;
23
24static const char *dso__name(struct dso *dso)
25{
26 const char *dso_name;
27
28 if (dso->symsrc_filename)
29 dso_name = dso->symsrc_filename;
30 else
31 dso_name = dso->long_name;
32
33 if (dso_name[0] == '[')
34 return NULL;
35
36 if (!strncmp(dso_name, "/tmp/perf-", 10))
37 return NULL;
38
39 return dso_name;
40}
41
42static int inline_list__append(struct symbol *symbol, char *srcline,
43 struct inline_node *node)
44{
45 struct inline_list *ilist;
46
47 ilist = zalloc(sizeof(*ilist));
48 if (ilist == NULL)
49 return -1;
50
51 ilist->symbol = symbol;
52 ilist->srcline = srcline;
53
54 if (callchain_param.order == ORDER_CALLEE)
55 list_add_tail(&ilist->list, &node->val);
56 else
57 list_add(&ilist->list, &node->val);
58
59 return 0;
60}
61
62/* basename version that takes a const input string */
63static const char *gnu_basename(const char *path)
64{
65 const char *base = strrchr(path, '/');
66
67 return base ? base + 1 : path;
68}
69
70static char *srcline_from_fileline(const char *file, unsigned int line)
71{
72 char *srcline;
73
74 if (!file)
75 return NULL;
76
77 if (!srcline_full_filename)
78 file = gnu_basename(file);
79
80 if (asprintf(&srcline, "%s:%u", file, line) < 0)
81 return NULL;
82
83 return srcline;
84}
85
86static struct symbol *new_inline_sym(struct dso *dso,
87 struct symbol *base_sym,
88 const char *funcname)
89{
90 struct symbol *inline_sym;
91 char *demangled = NULL;
92
93 if (!funcname)
94 funcname = "??";
95
96 if (dso) {
97 demangled = dso__demangle_sym(dso, 0, funcname);
98 if (demangled)
99 funcname = demangled;
100 }
101
102 if (base_sym && strcmp(funcname, base_sym->name) == 0) {
103 /* reuse the real, existing symbol */
104 inline_sym = base_sym;
105 /* ensure that we don't alias an inlined symbol, which could
106 * lead to double frees in inline_node__delete
107 */
108 assert(!base_sym->inlined);
109 } else {
110 /* create a fake symbol for the inline frame */
111 inline_sym = symbol__new(base_sym ? base_sym->start : 0,
112 base_sym ? (base_sym->end - base_sym->start) : 0,
113 base_sym ? base_sym->binding : 0,
114 base_sym ? base_sym->type : 0,
115 funcname);
116 if (inline_sym)
117 inline_sym->inlined = 1;
118 }
119
120 free(demangled);
121
122 return inline_sym;
123}
124
125#define MAX_INLINE_NEST 1024
126
127#ifdef HAVE_LIBBFD_SUPPORT
128
129/*
130 * Implement addr2line using libbfd.
131 */
132#define PACKAGE "perf"
133#include <bfd.h>
134
135struct a2l_data {
136 const char *input;
137 u64 addr;
138
139 bool found;
140 const char *filename;
141 const char *funcname;
142 unsigned line;
143
144 bfd *abfd;
145 asymbol **syms;
146};
147
148static int bfd_error(const char *string)
149{
150 const char *errmsg;
151
152 errmsg = bfd_errmsg(bfd_get_error());
153 fflush(stdout);
154
155 if (string)
156 pr_debug("%s: %s\n", string, errmsg);
157 else
158 pr_debug("%s\n", errmsg);
159
160 return -1;
161}
162
163static int slurp_symtab(bfd *abfd, struct a2l_data *a2l)
164{
165 long storage;
166 long symcount;
167 asymbol **syms;
168 bfd_boolean dynamic = FALSE;
169
170 if ((bfd_get_file_flags(abfd) & HAS_SYMS) == 0)
171 return bfd_error(bfd_get_filename(abfd));
172
173 storage = bfd_get_symtab_upper_bound(abfd);
174 if (storage == 0L) {
175 storage = bfd_get_dynamic_symtab_upper_bound(abfd);
176 dynamic = TRUE;
177 }
178 if (storage < 0L)
179 return bfd_error(bfd_get_filename(abfd));
180
181 syms = malloc(storage);
182 if (dynamic)
183 symcount = bfd_canonicalize_dynamic_symtab(abfd, syms);
184 else
185 symcount = bfd_canonicalize_symtab(abfd, syms);
186
187 if (symcount < 0) {
188 free(syms);
189 return bfd_error(bfd_get_filename(abfd));
190 }
191
192 a2l->syms = syms;
193 return 0;
194}
195
196static void find_address_in_section(bfd *abfd, asection *section, void *data)
197{
198 bfd_vma pc, vma;
199 bfd_size_type size;
200 struct a2l_data *a2l = data;
201 flagword flags;
202
203 if (a2l->found)
204 return;
205
206#ifdef bfd_get_section_flags
207 flags = bfd_get_section_flags(abfd, section);
208#else
209 flags = bfd_section_flags(section);
210#endif
211 if ((flags & SEC_ALLOC) == 0)
212 return;
213
214 pc = a2l->addr;
215#ifdef bfd_get_section_vma
216 vma = bfd_get_section_vma(abfd, section);
217#else
218 vma = bfd_section_vma(section);
219#endif
220#ifdef bfd_get_section_size
221 size = bfd_get_section_size(section);
222#else
223 size = bfd_section_size(section);
224#endif
225
226 if (pc < vma || pc >= vma + size)
227 return;
228
229 a2l->found = bfd_find_nearest_line(abfd, section, a2l->syms, pc - vma,
230 &a2l->filename, &a2l->funcname,
231 &a2l->line);
232
233 if (a2l->filename && !strlen(a2l->filename))
234 a2l->filename = NULL;
235}
236
237static struct a2l_data *addr2line_init(const char *path)
238{
239 bfd *abfd;
240 struct a2l_data *a2l = NULL;
241
242 abfd = bfd_openr(path, NULL);
243 if (abfd == NULL)
244 return NULL;
245
246 if (!bfd_check_format(abfd, bfd_object))
247 goto out;
248
249 a2l = zalloc(sizeof(*a2l));
250 if (a2l == NULL)
251 goto out;
252
253 a2l->abfd = abfd;
254 a2l->input = strdup(path);
255 if (a2l->input == NULL)
256 goto out;
257
258 if (slurp_symtab(abfd, a2l))
259 goto out;
260
261 return a2l;
262
263out:
264 if (a2l) {
265 zfree((char **)&a2l->input);
266 free(a2l);
267 }
268 bfd_close(abfd);
269 return NULL;
270}
271
272static void addr2line_cleanup(struct a2l_data *a2l)
273{
274 if (a2l->abfd)
275 bfd_close(a2l->abfd);
276 zfree((char **)&a2l->input);
277 zfree(&a2l->syms);
278 free(a2l);
279}
280
281static int inline_list__append_dso_a2l(struct dso *dso,
282 struct inline_node *node,
283 struct symbol *sym)
284{
285 struct a2l_data *a2l = dso->a2l;
286 struct symbol *inline_sym = new_inline_sym(dso, sym, a2l->funcname);
287 char *srcline = NULL;
288
289 if (a2l->filename)
290 srcline = srcline_from_fileline(a2l->filename, a2l->line);
291
292 return inline_list__append(inline_sym, srcline, node);
293}
294
295static int addr2line(const char *dso_name, u64 addr,
296 char **file, unsigned int *line, struct dso *dso,
297 bool unwind_inlines, struct inline_node *node,
298 struct symbol *sym)
299{
300 int ret = 0;
301 struct a2l_data *a2l = dso->a2l;
302
303 if (!a2l) {
304 dso->a2l = addr2line_init(dso_name);
305 a2l = dso->a2l;
306 }
307
308 if (a2l == NULL) {
309 if (!symbol_conf.disable_add2line_warn)
310 pr_warning("addr2line_init failed for %s\n", dso_name);
311 return 0;
312 }
313
314 a2l->addr = addr;
315 a2l->found = false;
316
317 bfd_map_over_sections(a2l->abfd, find_address_in_section, a2l);
318
319 if (!a2l->found)
320 return 0;
321
322 if (unwind_inlines) {
323 int cnt = 0;
324
325 if (node && inline_list__append_dso_a2l(dso, node, sym))
326 return 0;
327
328 while (bfd_find_inliner_info(a2l->abfd, &a2l->filename,
329 &a2l->funcname, &a2l->line) &&
330 cnt++ < MAX_INLINE_NEST) {
331
332 if (a2l->filename && !strlen(a2l->filename))
333 a2l->filename = NULL;
334
335 if (node != NULL) {
336 if (inline_list__append_dso_a2l(dso, node, sym))
337 return 0;
338 // found at least one inline frame
339 ret = 1;
340 }
341 }
342 }
343
344 if (file) {
345 *file = a2l->filename ? strdup(a2l->filename) : NULL;
346 ret = *file ? 1 : 0;
347 }
348
349 if (line)
350 *line = a2l->line;
351
352 return ret;
353}
354
355void dso__free_a2l(struct dso *dso)
356{
357 struct a2l_data *a2l = dso->a2l;
358
359 if (!a2l)
360 return;
361
362 addr2line_cleanup(a2l);
363
364 dso->a2l = NULL;
365}
366
367#else /* HAVE_LIBBFD_SUPPORT */
368
369struct a2l_subprocess {
370 struct child_process addr2line;
371 FILE *to_child;
372 FILE *from_child;
373};
374
375static int filename_split(char *filename, unsigned int *line_nr)
376{
377 char *sep;
378
379 sep = strchr(filename, '\n');
380 if (sep)
381 *sep = '\0';
382
383 if (!strcmp(filename, "??:0"))
384 return 0;
385
386 sep = strchr(filename, ':');
387 if (sep) {
388 *sep++ = '\0';
389 *line_nr = strtoul(sep, NULL, 0);
390 return 1;
391 }
392
393 return 0;
394}
395
396static void addr2line_subprocess_cleanup(struct a2l_subprocess *a2l)
397{
398 if (a2l->addr2line.pid != -1) {
399 kill(a2l->addr2line.pid, SIGKILL);
400 finish_command(&a2l->addr2line); /* ignore result, we don't care */
401 a2l->addr2line.pid = -1;
402 }
403
404 if (a2l->to_child != NULL) {
405 fclose(a2l->to_child);
406 a2l->to_child = NULL;
407 }
408
409 if (a2l->from_child != NULL) {
410 fclose(a2l->from_child);
411 a2l->from_child = NULL;
412 }
413
414 free(a2l);
415}
416
417static struct a2l_subprocess *addr2line_subprocess_init(const char *path)
418{
419 const char *argv[] = { "addr2line", "-e", path, "-i", "-f", NULL };
420 struct a2l_subprocess *a2l = zalloc(sizeof(*a2l));
421 int start_command_status = 0;
422
423 if (a2l == NULL)
424 goto out;
425
426 a2l->to_child = NULL;
427 a2l->from_child = NULL;
428
429 a2l->addr2line.pid = -1;
430 a2l->addr2line.in = -1;
431 a2l->addr2line.out = -1;
432 a2l->addr2line.no_stderr = 1;
433
434 a2l->addr2line.argv = argv;
435 start_command_status = start_command(&a2l->addr2line);
436 a2l->addr2line.argv = NULL; /* it's not used after start_command; avoid dangling pointers */
437
438 if (start_command_status != 0) {
439 pr_warning("could not start addr2line for %s: start_command return code %d\n",
440 path,
441 start_command_status);
442 goto out;
443 }
444
445 a2l->to_child = fdopen(a2l->addr2line.in, "w");
446 if (a2l->to_child == NULL) {
447 pr_warning("could not open write-stream to addr2line of %s\n", path);
448 goto out;
449 }
450
451 a2l->from_child = fdopen(a2l->addr2line.out, "r");
452 if (a2l->from_child == NULL) {
453 pr_warning("could not open read-stream from addr2line of %s\n", path);
454 goto out;
455 }
456
457 return a2l;
458
459out:
460 if (a2l)
461 addr2line_subprocess_cleanup(a2l);
462
463 return NULL;
464}
465
466static int read_addr2line_record(struct a2l_subprocess *a2l,
467 char **function,
468 char **filename,
469 unsigned int *line_nr)
470{
471 /*
472 * Returns:
473 * -1 ==> error
474 * 0 ==> sentinel (or other ill-formed) record read
475 * 1 ==> a genuine record read
476 */
477 char *line = NULL;
478 size_t line_len = 0;
479 unsigned int dummy_line_nr = 0;
480 int ret = -1;
481
482 if (function != NULL)
483 zfree(function);
484
485 if (filename != NULL)
486 zfree(filename);
487
488 if (line_nr != NULL)
489 *line_nr = 0;
490
491 if (getline(&line, &line_len, a2l->from_child) < 0 || !line_len)
492 goto error;
493
494 if (function != NULL)
495 *function = strdup(strim(line));
496
497 zfree(&line);
498 line_len = 0;
499
500 if (getline(&line, &line_len, a2l->from_child) < 0 || !line_len)
501 goto error;
502
503 if (filename_split(line, line_nr == NULL ? &dummy_line_nr : line_nr) == 0) {
504 ret = 0;
505 goto error;
506 }
507
508 if (filename != NULL)
509 *filename = strdup(line);
510
511 zfree(&line);
512 line_len = 0;
513
514 return 1;
515
516error:
517 free(line);
518 if (function != NULL)
519 zfree(function);
520 if (filename != NULL)
521 zfree(filename);
522 return ret;
523}
524
525static int inline_list__append_record(struct dso *dso,
526 struct inline_node *node,
527 struct symbol *sym,
528 const char *function,
529 const char *filename,
530 unsigned int line_nr)
531{
532 struct symbol *inline_sym = new_inline_sym(dso, sym, function);
533
534 return inline_list__append(inline_sym, srcline_from_fileline(filename, line_nr), node);
535}
536
537static int addr2line(const char *dso_name, u64 addr,
538 char **file, unsigned int *line_nr,
539 struct dso *dso,
540 bool unwind_inlines,
541 struct inline_node *node,
542 struct symbol *sym __maybe_unused)
543{
544 struct a2l_subprocess *a2l = dso->a2l;
545 char *record_function = NULL;
546 char *record_filename = NULL;
547 unsigned int record_line_nr = 0;
548 int record_status = -1;
549 int ret = 0;
550 size_t inline_count = 0;
551
552 if (!a2l) {
553 if (!filename__has_section(dso_name, ".debug_line"))
554 goto out;
555
556 dso->a2l = addr2line_subprocess_init(dso_name);
557 a2l = dso->a2l;
558 }
559
560 if (a2l == NULL) {
561 if (!symbol_conf.disable_add2line_warn)
562 pr_warning("%s %s: addr2line_subprocess_init failed\n", __func__, dso_name);
563 goto out;
564 }
565
566 /*
567 * Send our request and then *deliberately* send something that can't be interpreted as
568 * a valid address to ask addr2line about (namely, ","). This causes addr2line to first
569 * write out the answer to our request, in an unbounded/unknown number of records, and
570 * then to write out the lines "??" and "??:0", so that we can detect when it has
571 * finished giving us anything useful. We have to be careful about the first record,
572 * though, because it may be genuinely unknown, in which case we'll get two sets of
573 * "??"/"??:0" lines.
574 */
575 if (fprintf(a2l->to_child, "%016"PRIx64"\n,\n", addr) < 0 || fflush(a2l->to_child) != 0) {
576 if (!symbol_conf.disable_add2line_warn)
577 pr_warning("%s %s: could not send request\n", __func__, dso_name);
578 goto out;
579 }
580
581 switch (read_addr2line_record(a2l, &record_function, &record_filename, &record_line_nr)) {
582 case -1:
583 if (!symbol_conf.disable_add2line_warn)
584 pr_warning("%s %s: could not read first record\n", __func__, dso_name);
585 goto out;
586 case 0:
587 /*
588 * The first record was invalid, so return failure, but first read another
589 * record, since we asked a junk question and have to clear the answer out.
590 */
591 switch (read_addr2line_record(a2l, NULL, NULL, NULL)) {
592 case -1:
593 if (!symbol_conf.disable_add2line_warn)
594 pr_warning("%s %s: could not read delimiter record\n",
595 __func__, dso_name);
596 break;
597 case 0:
598 /* As expected. */
599 break;
600 default:
601 if (!symbol_conf.disable_add2line_warn)
602 pr_warning("%s %s: unexpected record instead of sentinel",
603 __func__, dso_name);
604 break;
605 }
606 goto out;
607 default:
608 break;
609 }
610
611 if (file) {
612 *file = strdup(record_filename);
613 ret = 1;
614 }
615 if (line_nr)
616 *line_nr = record_line_nr;
617
618 if (unwind_inlines) {
619 if (node && inline_list__append_record(dso, node, sym,
620 record_function,
621 record_filename,
622 record_line_nr)) {
623 ret = 0;
624 goto out;
625 }
626 }
627
628 /* We have to read the records even if we don't care about the inline info. */
629 while ((record_status = read_addr2line_record(a2l,
630 &record_function,
631 &record_filename,
632 &record_line_nr)) == 1) {
633 if (unwind_inlines && node && inline_count++ < MAX_INLINE_NEST) {
634 if (inline_list__append_record(dso, node, sym,
635 record_function,
636 record_filename,
637 record_line_nr)) {
638 ret = 0;
639 goto out;
640 }
641 ret = 1; /* found at least one inline frame */
642 }
643 }
644
645out:
646 free(record_function);
647 free(record_filename);
648 return ret;
649}
650
651void dso__free_a2l(struct dso *dso)
652{
653 struct a2l_subprocess *a2l = dso->a2l;
654
655 if (!a2l)
656 return;
657
658 addr2line_subprocess_cleanup(a2l);
659
660 dso->a2l = NULL;
661}
662
663#endif /* HAVE_LIBBFD_SUPPORT */
664
665static struct inline_node *addr2inlines(const char *dso_name, u64 addr,
666 struct dso *dso, struct symbol *sym)
667{
668 struct inline_node *node;
669
670 node = zalloc(sizeof(*node));
671 if (node == NULL) {
672 perror("not enough memory for the inline node");
673 return NULL;
674 }
675
676 INIT_LIST_HEAD(&node->val);
677 node->addr = addr;
678
679 addr2line(dso_name, addr, NULL, NULL, dso, true, node, sym);
680 return node;
681}
682
683/*
684 * Number of addr2line failures (without success) before disabling it for that
685 * dso.
686 */
687#define A2L_FAIL_LIMIT 123
688
689char *__get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
690 bool show_sym, bool show_addr, bool unwind_inlines,
691 u64 ip)
692{
693 char *file = NULL;
694 unsigned line = 0;
695 char *srcline;
696 const char *dso_name;
697
698 if (!dso->has_srcline)
699 goto out;
700
701 dso_name = dso__name(dso);
702 if (dso_name == NULL)
703 goto out;
704
705 if (!addr2line(dso_name, addr, &file, &line, dso,
706 unwind_inlines, NULL, sym))
707 goto out;
708
709 srcline = srcline_from_fileline(file, line);
710 free(file);
711
712 if (!srcline)
713 goto out;
714
715 dso->a2l_fails = 0;
716
717 return srcline;
718
719out:
720 if (dso->a2l_fails && ++dso->a2l_fails > A2L_FAIL_LIMIT) {
721 dso->has_srcline = 0;
722 dso__free_a2l(dso);
723 }
724
725 if (!show_addr)
726 return (show_sym && sym) ?
727 strndup(sym->name, sym->namelen) : SRCLINE_UNKNOWN;
728
729 if (sym) {
730 if (asprintf(&srcline, "%s+%" PRIu64, show_sym ? sym->name : "",
731 ip - sym->start) < 0)
732 return SRCLINE_UNKNOWN;
733 } else if (asprintf(&srcline, "%s[%" PRIx64 "]", dso->short_name, addr) < 0)
734 return SRCLINE_UNKNOWN;
735 return srcline;
736}
737
738/* Returns filename and fills in line number in line */
739char *get_srcline_split(struct dso *dso, u64 addr, unsigned *line)
740{
741 char *file = NULL;
742 const char *dso_name;
743
744 if (!dso->has_srcline)
745 goto out;
746
747 dso_name = dso__name(dso);
748 if (dso_name == NULL)
749 goto out;
750
751 if (!addr2line(dso_name, addr, &file, line, dso, true, NULL, NULL))
752 goto out;
753
754 dso->a2l_fails = 0;
755 return file;
756
757out:
758 if (dso->a2l_fails && ++dso->a2l_fails > A2L_FAIL_LIMIT) {
759 dso->has_srcline = 0;
760 dso__free_a2l(dso);
761 }
762
763 return NULL;
764}
765
766void free_srcline(char *srcline)
767{
768 if (srcline && strcmp(srcline, SRCLINE_UNKNOWN) != 0)
769 free(srcline);
770}
771
772char *get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
773 bool show_sym, bool show_addr, u64 ip)
774{
775 return __get_srcline(dso, addr, sym, show_sym, show_addr, false, ip);
776}
777
778struct srcline_node {
779 u64 addr;
780 char *srcline;
781 struct rb_node rb_node;
782};
783
784void srcline__tree_insert(struct rb_root_cached *tree, u64 addr, char *srcline)
785{
786 struct rb_node **p = &tree->rb_root.rb_node;
787 struct rb_node *parent = NULL;
788 struct srcline_node *i, *node;
789 bool leftmost = true;
790
791 node = zalloc(sizeof(struct srcline_node));
792 if (!node) {
793 perror("not enough memory for the srcline node");
794 return;
795 }
796
797 node->addr = addr;
798 node->srcline = srcline;
799
800 while (*p != NULL) {
801 parent = *p;
802 i = rb_entry(parent, struct srcline_node, rb_node);
803 if (addr < i->addr)
804 p = &(*p)->rb_left;
805 else {
806 p = &(*p)->rb_right;
807 leftmost = false;
808 }
809 }
810 rb_link_node(&node->rb_node, parent, p);
811 rb_insert_color_cached(&node->rb_node, tree, leftmost);
812}
813
814char *srcline__tree_find(struct rb_root_cached *tree, u64 addr)
815{
816 struct rb_node *n = tree->rb_root.rb_node;
817
818 while (n) {
819 struct srcline_node *i = rb_entry(n, struct srcline_node,
820 rb_node);
821
822 if (addr < i->addr)
823 n = n->rb_left;
824 else if (addr > i->addr)
825 n = n->rb_right;
826 else
827 return i->srcline;
828 }
829
830 return NULL;
831}
832
833void srcline__tree_delete(struct rb_root_cached *tree)
834{
835 struct srcline_node *pos;
836 struct rb_node *next = rb_first_cached(tree);
837
838 while (next) {
839 pos = rb_entry(next, struct srcline_node, rb_node);
840 next = rb_next(&pos->rb_node);
841 rb_erase_cached(&pos->rb_node, tree);
842 free_srcline(pos->srcline);
843 zfree(&pos);
844 }
845}
846
847struct inline_node *dso__parse_addr_inlines(struct dso *dso, u64 addr,
848 struct symbol *sym)
849{
850 const char *dso_name;
851
852 dso_name = dso__name(dso);
853 if (dso_name == NULL)
854 return NULL;
855
856 return addr2inlines(dso_name, addr, dso, sym);
857}
858
859void inline_node__delete(struct inline_node *node)
860{
861 struct inline_list *ilist, *tmp;
862
863 list_for_each_entry_safe(ilist, tmp, &node->val, list) {
864 list_del_init(&ilist->list);
865 free_srcline(ilist->srcline);
866 /* only the inlined symbols are owned by the list */
867 if (ilist->symbol && ilist->symbol->inlined)
868 symbol__delete(ilist->symbol);
869 free(ilist);
870 }
871
872 free(node);
873}
874
875void inlines__tree_insert(struct rb_root_cached *tree,
876 struct inline_node *inlines)
877{
878 struct rb_node **p = &tree->rb_root.rb_node;
879 struct rb_node *parent = NULL;
880 const u64 addr = inlines->addr;
881 struct inline_node *i;
882 bool leftmost = true;
883
884 while (*p != NULL) {
885 parent = *p;
886 i = rb_entry(parent, struct inline_node, rb_node);
887 if (addr < i->addr)
888 p = &(*p)->rb_left;
889 else {
890 p = &(*p)->rb_right;
891 leftmost = false;
892 }
893 }
894 rb_link_node(&inlines->rb_node, parent, p);
895 rb_insert_color_cached(&inlines->rb_node, tree, leftmost);
896}
897
898struct inline_node *inlines__tree_find(struct rb_root_cached *tree, u64 addr)
899{
900 struct rb_node *n = tree->rb_root.rb_node;
901
902 while (n) {
903 struct inline_node *i = rb_entry(n, struct inline_node,
904 rb_node);
905
906 if (addr < i->addr)
907 n = n->rb_left;
908 else if (addr > i->addr)
909 n = n->rb_right;
910 else
911 return i;
912 }
913
914 return NULL;
915}
916
917void inlines__tree_delete(struct rb_root_cached *tree)
918{
919 struct inline_node *pos;
920 struct rb_node *next = rb_first_cached(tree);
921
922 while (next) {
923 pos = rb_entry(next, struct inline_node, rb_node);
924 next = rb_next(&pos->rb_node);
925 rb_erase_cached(&pos->rb_node, tree);
926 inline_node__delete(pos);
927 }
928}
1// SPDX-License-Identifier: GPL-2.0
2#include <inttypes.h>
3#include <signal.h>
4#include <stdio.h>
5#include <stdlib.h>
6#include <string.h>
7#include <sys/types.h>
8
9#include <linux/kernel.h>
10#include <linux/string.h>
11#include <linux/zalloc.h>
12
13#include <api/io.h>
14
15#include "util/dso.h"
16#include "util/debug.h"
17#include "util/callchain.h"
18#include "util/symbol_conf.h"
19#include "srcline.h"
20#include "string2.h"
21#include "symbol.h"
22#include "subcmd/run-command.h"
23
24/* If addr2line doesn't return data for 1 second then timeout. */
25int addr2line_timeout_ms = 1 * 1000;
26bool srcline_full_filename;
27
28char *srcline__unknown = (char *)"??:0";
29
30static const char *dso__name(struct dso *dso)
31{
32 const char *dso_name;
33
34 if (dso->symsrc_filename)
35 dso_name = dso->symsrc_filename;
36 else
37 dso_name = dso->long_name;
38
39 if (dso_name[0] == '[')
40 return NULL;
41
42 if (!strncmp(dso_name, "/tmp/perf-", 10))
43 return NULL;
44
45 return dso_name;
46}
47
48static int inline_list__append(struct symbol *symbol, char *srcline,
49 struct inline_node *node)
50{
51 struct inline_list *ilist;
52
53 ilist = zalloc(sizeof(*ilist));
54 if (ilist == NULL)
55 return -1;
56
57 ilist->symbol = symbol;
58 ilist->srcline = srcline;
59
60 if (callchain_param.order == ORDER_CALLEE)
61 list_add_tail(&ilist->list, &node->val);
62 else
63 list_add(&ilist->list, &node->val);
64
65 return 0;
66}
67
68/* basename version that takes a const input string */
69static const char *gnu_basename(const char *path)
70{
71 const char *base = strrchr(path, '/');
72
73 return base ? base + 1 : path;
74}
75
76static char *srcline_from_fileline(const char *file, unsigned int line)
77{
78 char *srcline;
79
80 if (!file)
81 return NULL;
82
83 if (!srcline_full_filename)
84 file = gnu_basename(file);
85
86 if (asprintf(&srcline, "%s:%u", file, line) < 0)
87 return NULL;
88
89 return srcline;
90}
91
92static struct symbol *new_inline_sym(struct dso *dso,
93 struct symbol *base_sym,
94 const char *funcname)
95{
96 struct symbol *inline_sym;
97 char *demangled = NULL;
98
99 if (!funcname)
100 funcname = "??";
101
102 if (dso) {
103 demangled = dso__demangle_sym(dso, 0, funcname);
104 if (demangled)
105 funcname = demangled;
106 }
107
108 if (base_sym && strcmp(funcname, base_sym->name) == 0) {
109 /* reuse the real, existing symbol */
110 inline_sym = base_sym;
111 /* ensure that we don't alias an inlined symbol, which could
112 * lead to double frees in inline_node__delete
113 */
114 assert(!base_sym->inlined);
115 } else {
116 /* create a fake symbol for the inline frame */
117 inline_sym = symbol__new(base_sym ? base_sym->start : 0,
118 base_sym ? (base_sym->end - base_sym->start) : 0,
119 base_sym ? base_sym->binding : 0,
120 base_sym ? base_sym->type : 0,
121 funcname);
122 if (inline_sym)
123 inline_sym->inlined = 1;
124 }
125
126 free(demangled);
127
128 return inline_sym;
129}
130
131#define MAX_INLINE_NEST 1024
132
133#ifdef HAVE_LIBBFD_SUPPORT
134
135/*
136 * Implement addr2line using libbfd.
137 */
138#define PACKAGE "perf"
139#include <bfd.h>
140
141struct a2l_data {
142 const char *input;
143 u64 addr;
144
145 bool found;
146 const char *filename;
147 const char *funcname;
148 unsigned line;
149
150 bfd *abfd;
151 asymbol **syms;
152};
153
154static int bfd_error(const char *string)
155{
156 const char *errmsg;
157
158 errmsg = bfd_errmsg(bfd_get_error());
159 fflush(stdout);
160
161 if (string)
162 pr_debug("%s: %s\n", string, errmsg);
163 else
164 pr_debug("%s\n", errmsg);
165
166 return -1;
167}
168
169static int slurp_symtab(bfd *abfd, struct a2l_data *a2l)
170{
171 long storage;
172 long symcount;
173 asymbol **syms;
174 bfd_boolean dynamic = FALSE;
175
176 if ((bfd_get_file_flags(abfd) & HAS_SYMS) == 0)
177 return bfd_error(bfd_get_filename(abfd));
178
179 storage = bfd_get_symtab_upper_bound(abfd);
180 if (storage == 0L) {
181 storage = bfd_get_dynamic_symtab_upper_bound(abfd);
182 dynamic = TRUE;
183 }
184 if (storage < 0L)
185 return bfd_error(bfd_get_filename(abfd));
186
187 syms = malloc(storage);
188 if (dynamic)
189 symcount = bfd_canonicalize_dynamic_symtab(abfd, syms);
190 else
191 symcount = bfd_canonicalize_symtab(abfd, syms);
192
193 if (symcount < 0) {
194 free(syms);
195 return bfd_error(bfd_get_filename(abfd));
196 }
197
198 a2l->syms = syms;
199 return 0;
200}
201
202static void find_address_in_section(bfd *abfd, asection *section, void *data)
203{
204 bfd_vma pc, vma;
205 bfd_size_type size;
206 struct a2l_data *a2l = data;
207 flagword flags;
208
209 if (a2l->found)
210 return;
211
212#ifdef bfd_get_section_flags
213 flags = bfd_get_section_flags(abfd, section);
214#else
215 flags = bfd_section_flags(section);
216#endif
217 if ((flags & SEC_ALLOC) == 0)
218 return;
219
220 pc = a2l->addr;
221#ifdef bfd_get_section_vma
222 vma = bfd_get_section_vma(abfd, section);
223#else
224 vma = bfd_section_vma(section);
225#endif
226#ifdef bfd_get_section_size
227 size = bfd_get_section_size(section);
228#else
229 size = bfd_section_size(section);
230#endif
231
232 if (pc < vma || pc >= vma + size)
233 return;
234
235 a2l->found = bfd_find_nearest_line(abfd, section, a2l->syms, pc - vma,
236 &a2l->filename, &a2l->funcname,
237 &a2l->line);
238
239 if (a2l->filename && !strlen(a2l->filename))
240 a2l->filename = NULL;
241}
242
243static struct a2l_data *addr2line_init(const char *path)
244{
245 bfd *abfd;
246 struct a2l_data *a2l = NULL;
247
248 abfd = bfd_openr(path, NULL);
249 if (abfd == NULL)
250 return NULL;
251
252 if (!bfd_check_format(abfd, bfd_object))
253 goto out;
254
255 a2l = zalloc(sizeof(*a2l));
256 if (a2l == NULL)
257 goto out;
258
259 a2l->abfd = abfd;
260 a2l->input = strdup(path);
261 if (a2l->input == NULL)
262 goto out;
263
264 if (slurp_symtab(abfd, a2l))
265 goto out;
266
267 return a2l;
268
269out:
270 if (a2l) {
271 zfree((char **)&a2l->input);
272 free(a2l);
273 }
274 bfd_close(abfd);
275 return NULL;
276}
277
278static void addr2line_cleanup(struct a2l_data *a2l)
279{
280 if (a2l->abfd)
281 bfd_close(a2l->abfd);
282 zfree((char **)&a2l->input);
283 zfree(&a2l->syms);
284 free(a2l);
285}
286
287static int inline_list__append_dso_a2l(struct dso *dso,
288 struct inline_node *node,
289 struct symbol *sym)
290{
291 struct a2l_data *a2l = dso->a2l;
292 struct symbol *inline_sym = new_inline_sym(dso, sym, a2l->funcname);
293 char *srcline = NULL;
294
295 if (a2l->filename)
296 srcline = srcline_from_fileline(a2l->filename, a2l->line);
297
298 return inline_list__append(inline_sym, srcline, node);
299}
300
301static int addr2line(const char *dso_name, u64 addr,
302 char **file, unsigned int *line, struct dso *dso,
303 bool unwind_inlines, struct inline_node *node,
304 struct symbol *sym)
305{
306 int ret = 0;
307 struct a2l_data *a2l = dso->a2l;
308
309 if (!a2l) {
310 dso->a2l = addr2line_init(dso_name);
311 a2l = dso->a2l;
312 }
313
314 if (a2l == NULL) {
315 if (!symbol_conf.disable_add2line_warn)
316 pr_warning("addr2line_init failed for %s\n", dso_name);
317 return 0;
318 }
319
320 a2l->addr = addr;
321 a2l->found = false;
322
323 bfd_map_over_sections(a2l->abfd, find_address_in_section, a2l);
324
325 if (!a2l->found)
326 return 0;
327
328 if (unwind_inlines) {
329 int cnt = 0;
330
331 if (node && inline_list__append_dso_a2l(dso, node, sym))
332 return 0;
333
334 while (bfd_find_inliner_info(a2l->abfd, &a2l->filename,
335 &a2l->funcname, &a2l->line) &&
336 cnt++ < MAX_INLINE_NEST) {
337
338 if (a2l->filename && !strlen(a2l->filename))
339 a2l->filename = NULL;
340
341 if (node != NULL) {
342 if (inline_list__append_dso_a2l(dso, node, sym))
343 return 0;
344 // found at least one inline frame
345 ret = 1;
346 }
347 }
348 }
349
350 if (file) {
351 *file = a2l->filename ? strdup(a2l->filename) : NULL;
352 ret = *file ? 1 : 0;
353 }
354
355 if (line)
356 *line = a2l->line;
357
358 return ret;
359}
360
361void dso__free_a2l(struct dso *dso)
362{
363 struct a2l_data *a2l = dso->a2l;
364
365 if (!a2l)
366 return;
367
368 addr2line_cleanup(a2l);
369
370 dso->a2l = NULL;
371}
372
373#else /* HAVE_LIBBFD_SUPPORT */
374
375static int filename_split(char *filename, unsigned int *line_nr)
376{
377 char *sep;
378
379 sep = strchr(filename, '\n');
380 if (sep)
381 *sep = '\0';
382
383 if (!strcmp(filename, "??:0"))
384 return 0;
385
386 sep = strchr(filename, ':');
387 if (sep) {
388 *sep++ = '\0';
389 *line_nr = strtoul(sep, NULL, 0);
390 return 1;
391 }
392 pr_debug("addr2line missing ':' in filename split\n");
393 return 0;
394}
395
396static void addr2line_subprocess_cleanup(struct child_process *a2l)
397{
398 if (a2l->pid != -1) {
399 kill(a2l->pid, SIGKILL);
400 finish_command(a2l); /* ignore result, we don't care */
401 a2l->pid = -1;
402 }
403
404 free(a2l);
405}
406
407static struct child_process *addr2line_subprocess_init(const char *addr2line_path,
408 const char *binary_path)
409{
410 const char *argv[] = {
411 addr2line_path ?: "addr2line",
412 "-e", binary_path,
413 "-a", "-i", "-f", NULL
414 };
415 struct child_process *a2l = zalloc(sizeof(*a2l));
416 int start_command_status = 0;
417
418 if (a2l == NULL) {
419 pr_err("Failed to allocate memory for addr2line");
420 return NULL;
421 }
422
423 a2l->pid = -1;
424 a2l->in = -1;
425 a2l->out = -1;
426 a2l->no_stderr = 1;
427
428 a2l->argv = argv;
429 start_command_status = start_command(a2l);
430 a2l->argv = NULL; /* it's not used after start_command; avoid dangling pointers */
431
432 if (start_command_status != 0) {
433 pr_warning("could not start addr2line (%s) for %s: start_command return code %d\n",
434 addr2line_path, binary_path, start_command_status);
435 addr2line_subprocess_cleanup(a2l);
436 return NULL;
437 }
438
439 return a2l;
440}
441
442enum a2l_style {
443 BROKEN,
444 GNU_BINUTILS,
445 LLVM,
446};
447
448static enum a2l_style addr2line_configure(struct child_process *a2l, const char *dso_name)
449{
450 static bool cached;
451 static enum a2l_style style;
452
453 if (!cached) {
454 char buf[128];
455 struct io io;
456 int ch;
457 int lines;
458
459 if (write(a2l->in, ",\n", 2) != 2)
460 return BROKEN;
461
462 io__init(&io, a2l->out, buf, sizeof(buf));
463 ch = io__get_char(&io);
464 if (ch == ',') {
465 style = LLVM;
466 cached = true;
467 lines = 1;
468 pr_debug("Detected LLVM addr2line style\n");
469 } else if (ch == '0') {
470 style = GNU_BINUTILS;
471 cached = true;
472 lines = 3;
473 pr_debug("Detected binutils addr2line style\n");
474 } else {
475 if (!symbol_conf.disable_add2line_warn) {
476 char *output = NULL;
477 size_t output_len;
478
479 io__getline(&io, &output, &output_len);
480 pr_warning("%s %s: addr2line configuration failed\n",
481 __func__, dso_name);
482 pr_warning("\t%c%s", ch, output);
483 }
484 pr_debug("Unknown/broken addr2line style\n");
485 return BROKEN;
486 }
487 while (lines) {
488 ch = io__get_char(&io);
489 if (ch <= 0)
490 break;
491 if (ch == '\n')
492 lines--;
493 }
494 /* Ignore SIGPIPE in the event addr2line exits. */
495 signal(SIGPIPE, SIG_IGN);
496 }
497 return style;
498}
499
500static int read_addr2line_record(struct io *io,
501 enum a2l_style style,
502 const char *dso_name,
503 u64 addr,
504 bool first,
505 char **function,
506 char **filename,
507 unsigned int *line_nr)
508{
509 /*
510 * Returns:
511 * -1 ==> error
512 * 0 ==> sentinel (or other ill-formed) record read
513 * 1 ==> a genuine record read
514 */
515 char *line = NULL;
516 size_t line_len = 0;
517 unsigned int dummy_line_nr = 0;
518 int ret = -1;
519
520 if (function != NULL)
521 zfree(function);
522
523 if (filename != NULL)
524 zfree(filename);
525
526 if (line_nr != NULL)
527 *line_nr = 0;
528
529 /*
530 * Read the first line. Without an error this will be:
531 * - for the first line an address like 0x1234,
532 * - the binutils sentinel 0x0000000000000000,
533 * - the llvm-addr2line the sentinel ',' character,
534 * - the function name line for an inlined function.
535 */
536 if (io__getline(io, &line, &line_len) < 0 || !line_len)
537 goto error;
538
539 pr_debug("%s %s: addr2line read address for sentinel: %s", __func__, dso_name, line);
540 if (style == LLVM && line_len == 2 && line[0] == ',') {
541 /* Found the llvm-addr2line sentinel character. */
542 zfree(&line);
543 return 0;
544 } else if (style == GNU_BINUTILS && (!first || addr != 0)) {
545 int zero_count = 0, non_zero_count = 0;
546 /*
547 * Check for binutils sentinel ignoring it for the case the
548 * requested address is 0.
549 */
550
551 /* A given address should always start 0x. */
552 if (line_len >= 2 || line[0] != '0' || line[1] != 'x') {
553 for (size_t i = 2; i < line_len; i++) {
554 if (line[i] == '0')
555 zero_count++;
556 else if (line[i] != '\n')
557 non_zero_count++;
558 }
559 if (!non_zero_count) {
560 int ch;
561
562 if (first && !zero_count) {
563 /* Line was erroneous just '0x'. */
564 goto error;
565 }
566 /*
567 * Line was 0x0..0, the sentinel for binutils. Remove
568 * the function and filename lines.
569 */
570 zfree(&line);
571 do {
572 ch = io__get_char(io);
573 } while (ch > 0 && ch != '\n');
574 do {
575 ch = io__get_char(io);
576 } while (ch > 0 && ch != '\n');
577 return 0;
578 }
579 }
580 }
581 /* Read the second function name line (if inline data then this is the first line). */
582 if (first && (io__getline(io, &line, &line_len) < 0 || !line_len))
583 goto error;
584
585 pr_debug("%s %s: addr2line read line: %s", __func__, dso_name, line);
586 if (function != NULL)
587 *function = strdup(strim(line));
588
589 zfree(&line);
590 line_len = 0;
591
592 /* Read the third filename and line number line. */
593 if (io__getline(io, &line, &line_len) < 0 || !line_len)
594 goto error;
595
596 pr_debug("%s %s: addr2line filename:number : %s", __func__, dso_name, line);
597 if (filename_split(line, line_nr == NULL ? &dummy_line_nr : line_nr) == 0 &&
598 style == GNU_BINUTILS) {
599 ret = 0;
600 goto error;
601 }
602
603 if (filename != NULL)
604 *filename = strdup(line);
605
606 zfree(&line);
607 line_len = 0;
608
609 return 1;
610
611error:
612 free(line);
613 if (function != NULL)
614 zfree(function);
615 if (filename != NULL)
616 zfree(filename);
617 return ret;
618}
619
620static int inline_list__append_record(struct dso *dso,
621 struct inline_node *node,
622 struct symbol *sym,
623 const char *function,
624 const char *filename,
625 unsigned int line_nr)
626{
627 struct symbol *inline_sym = new_inline_sym(dso, sym, function);
628
629 return inline_list__append(inline_sym, srcline_from_fileline(filename, line_nr), node);
630}
631
632static int addr2line(const char *dso_name, u64 addr,
633 char **file, unsigned int *line_nr,
634 struct dso *dso,
635 bool unwind_inlines,
636 struct inline_node *node,
637 struct symbol *sym __maybe_unused)
638{
639 struct child_process *a2l = dso->a2l;
640 char *record_function = NULL;
641 char *record_filename = NULL;
642 unsigned int record_line_nr = 0;
643 int record_status = -1;
644 int ret = 0;
645 size_t inline_count = 0;
646 int len;
647 char buf[128];
648 ssize_t written;
649 struct io io = { .eof = false };
650 enum a2l_style a2l_style;
651
652 if (!a2l) {
653 if (!filename__has_section(dso_name, ".debug_line"))
654 goto out;
655
656 dso->a2l = addr2line_subprocess_init(symbol_conf.addr2line_path, dso_name);
657 a2l = dso->a2l;
658 }
659
660 if (a2l == NULL) {
661 if (!symbol_conf.disable_add2line_warn)
662 pr_warning("%s %s: addr2line_subprocess_init failed\n", __func__, dso_name);
663 goto out;
664 }
665 a2l_style = addr2line_configure(a2l, dso_name);
666 if (a2l_style == BROKEN)
667 goto out;
668
669 /*
670 * Send our request and then *deliberately* send something that can't be
671 * interpreted as a valid address to ask addr2line about (namely,
672 * ","). This causes addr2line to first write out the answer to our
673 * request, in an unbounded/unknown number of records, and then to write
674 * out the lines "0x0...0", "??" and "??:0", for GNU binutils, or ","
675 * for llvm-addr2line, so that we can detect when it has finished giving
676 * us anything useful.
677 */
678 len = snprintf(buf, sizeof(buf), "%016"PRIx64"\n,\n", addr);
679 written = len > 0 ? write(a2l->in, buf, len) : -1;
680 if (written != len) {
681 if (!symbol_conf.disable_add2line_warn)
682 pr_warning("%s %s: could not send request\n", __func__, dso_name);
683 goto out;
684 }
685 io__init(&io, a2l->out, buf, sizeof(buf));
686 io.timeout_ms = addr2line_timeout_ms;
687 switch (read_addr2line_record(&io, a2l_style, dso_name, addr, /*first=*/true,
688 &record_function, &record_filename, &record_line_nr)) {
689 case -1:
690 if (!symbol_conf.disable_add2line_warn)
691 pr_warning("%s %s: could not read first record\n", __func__, dso_name);
692 goto out;
693 case 0:
694 /*
695 * The first record was invalid, so return failure, but first
696 * read another record, since we sent a sentinel ',' for the
697 * sake of detected the last inlined function. Treat this as the
698 * first of a record as the ',' generates a new start with GNU
699 * binutils, also force a non-zero address as we're no longer
700 * reading that record.
701 */
702 switch (read_addr2line_record(&io, a2l_style, dso_name,
703 /*addr=*/1, /*first=*/true,
704 NULL, NULL, NULL)) {
705 case -1:
706 if (!symbol_conf.disable_add2line_warn)
707 pr_warning("%s %s: could not read sentinel record\n",
708 __func__, dso_name);
709 break;
710 case 0:
711 /* The sentinel as expected. */
712 break;
713 default:
714 if (!symbol_conf.disable_add2line_warn)
715 pr_warning("%s %s: unexpected record instead of sentinel",
716 __func__, dso_name);
717 break;
718 }
719 goto out;
720 default:
721 /* First record as expected. */
722 break;
723 }
724
725 if (file) {
726 *file = strdup(record_filename);
727 ret = 1;
728 }
729 if (line_nr)
730 *line_nr = record_line_nr;
731
732 if (unwind_inlines) {
733 if (node && inline_list__append_record(dso, node, sym,
734 record_function,
735 record_filename,
736 record_line_nr)) {
737 ret = 0;
738 goto out;
739 }
740 }
741
742 /*
743 * We have to read the records even if we don't care about the inline
744 * info. This isn't the first record and force the address to non-zero
745 * as we're reading records beyond the first.
746 */
747 while ((record_status = read_addr2line_record(&io,
748 a2l_style,
749 dso_name,
750 /*addr=*/1,
751 /*first=*/false,
752 &record_function,
753 &record_filename,
754 &record_line_nr)) == 1) {
755 if (unwind_inlines && node && inline_count++ < MAX_INLINE_NEST) {
756 if (inline_list__append_record(dso, node, sym,
757 record_function,
758 record_filename,
759 record_line_nr)) {
760 ret = 0;
761 goto out;
762 }
763 ret = 1; /* found at least one inline frame */
764 }
765 }
766
767out:
768 free(record_function);
769 free(record_filename);
770 if (io.eof) {
771 dso->a2l = NULL;
772 addr2line_subprocess_cleanup(a2l);
773 }
774 return ret;
775}
776
777void dso__free_a2l(struct dso *dso)
778{
779 struct child_process *a2l = dso->a2l;
780
781 if (!a2l)
782 return;
783
784 addr2line_subprocess_cleanup(a2l);
785
786 dso->a2l = NULL;
787}
788
789#endif /* HAVE_LIBBFD_SUPPORT */
790
791static struct inline_node *addr2inlines(const char *dso_name, u64 addr,
792 struct dso *dso, struct symbol *sym)
793{
794 struct inline_node *node;
795
796 node = zalloc(sizeof(*node));
797 if (node == NULL) {
798 perror("not enough memory for the inline node");
799 return NULL;
800 }
801
802 INIT_LIST_HEAD(&node->val);
803 node->addr = addr;
804
805 addr2line(dso_name, addr, NULL, NULL, dso, true, node, sym);
806 return node;
807}
808
809/*
810 * Number of addr2line failures (without success) before disabling it for that
811 * dso.
812 */
813#define A2L_FAIL_LIMIT 123
814
815char *__get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
816 bool show_sym, bool show_addr, bool unwind_inlines,
817 u64 ip)
818{
819 char *file = NULL;
820 unsigned line = 0;
821 char *srcline;
822 const char *dso_name;
823
824 if (!dso->has_srcline)
825 goto out;
826
827 dso_name = dso__name(dso);
828 if (dso_name == NULL)
829 goto out;
830
831 if (!addr2line(dso_name, addr, &file, &line, dso,
832 unwind_inlines, NULL, sym))
833 goto out;
834
835 srcline = srcline_from_fileline(file, line);
836 free(file);
837
838 if (!srcline)
839 goto out;
840
841 dso->a2l_fails = 0;
842
843 return srcline;
844
845out:
846 if (dso->a2l_fails && ++dso->a2l_fails > A2L_FAIL_LIMIT) {
847 dso->has_srcline = 0;
848 dso__free_a2l(dso);
849 }
850
851 if (!show_addr)
852 return (show_sym && sym) ?
853 strndup(sym->name, sym->namelen) : SRCLINE_UNKNOWN;
854
855 if (sym) {
856 if (asprintf(&srcline, "%s+%" PRIu64, show_sym ? sym->name : "",
857 ip - sym->start) < 0)
858 return SRCLINE_UNKNOWN;
859 } else if (asprintf(&srcline, "%s[%" PRIx64 "]", dso->short_name, addr) < 0)
860 return SRCLINE_UNKNOWN;
861 return srcline;
862}
863
864/* Returns filename and fills in line number in line */
865char *get_srcline_split(struct dso *dso, u64 addr, unsigned *line)
866{
867 char *file = NULL;
868 const char *dso_name;
869
870 if (!dso->has_srcline)
871 goto out;
872
873 dso_name = dso__name(dso);
874 if (dso_name == NULL)
875 goto out;
876
877 if (!addr2line(dso_name, addr, &file, line, dso, true, NULL, NULL))
878 goto out;
879
880 dso->a2l_fails = 0;
881 return file;
882
883out:
884 if (dso->a2l_fails && ++dso->a2l_fails > A2L_FAIL_LIMIT) {
885 dso->has_srcline = 0;
886 dso__free_a2l(dso);
887 }
888
889 return NULL;
890}
891
892void zfree_srcline(char **srcline)
893{
894 if (*srcline == NULL)
895 return;
896
897 if (*srcline != SRCLINE_UNKNOWN)
898 free(*srcline);
899
900 *srcline = NULL;
901}
902
903char *get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
904 bool show_sym, bool show_addr, u64 ip)
905{
906 return __get_srcline(dso, addr, sym, show_sym, show_addr, false, ip);
907}
908
909struct srcline_node {
910 u64 addr;
911 char *srcline;
912 struct rb_node rb_node;
913};
914
915void srcline__tree_insert(struct rb_root_cached *tree, u64 addr, char *srcline)
916{
917 struct rb_node **p = &tree->rb_root.rb_node;
918 struct rb_node *parent = NULL;
919 struct srcline_node *i, *node;
920 bool leftmost = true;
921
922 node = zalloc(sizeof(struct srcline_node));
923 if (!node) {
924 perror("not enough memory for the srcline node");
925 return;
926 }
927
928 node->addr = addr;
929 node->srcline = srcline;
930
931 while (*p != NULL) {
932 parent = *p;
933 i = rb_entry(parent, struct srcline_node, rb_node);
934 if (addr < i->addr)
935 p = &(*p)->rb_left;
936 else {
937 p = &(*p)->rb_right;
938 leftmost = false;
939 }
940 }
941 rb_link_node(&node->rb_node, parent, p);
942 rb_insert_color_cached(&node->rb_node, tree, leftmost);
943}
944
945char *srcline__tree_find(struct rb_root_cached *tree, u64 addr)
946{
947 struct rb_node *n = tree->rb_root.rb_node;
948
949 while (n) {
950 struct srcline_node *i = rb_entry(n, struct srcline_node,
951 rb_node);
952
953 if (addr < i->addr)
954 n = n->rb_left;
955 else if (addr > i->addr)
956 n = n->rb_right;
957 else
958 return i->srcline;
959 }
960
961 return NULL;
962}
963
964void srcline__tree_delete(struct rb_root_cached *tree)
965{
966 struct srcline_node *pos;
967 struct rb_node *next = rb_first_cached(tree);
968
969 while (next) {
970 pos = rb_entry(next, struct srcline_node, rb_node);
971 next = rb_next(&pos->rb_node);
972 rb_erase_cached(&pos->rb_node, tree);
973 zfree_srcline(&pos->srcline);
974 zfree(&pos);
975 }
976}
977
978struct inline_node *dso__parse_addr_inlines(struct dso *dso, u64 addr,
979 struct symbol *sym)
980{
981 const char *dso_name;
982
983 dso_name = dso__name(dso);
984 if (dso_name == NULL)
985 return NULL;
986
987 return addr2inlines(dso_name, addr, dso, sym);
988}
989
990void inline_node__delete(struct inline_node *node)
991{
992 struct inline_list *ilist, *tmp;
993
994 list_for_each_entry_safe(ilist, tmp, &node->val, list) {
995 list_del_init(&ilist->list);
996 zfree_srcline(&ilist->srcline);
997 /* only the inlined symbols are owned by the list */
998 if (ilist->symbol && ilist->symbol->inlined)
999 symbol__delete(ilist->symbol);
1000 free(ilist);
1001 }
1002
1003 free(node);
1004}
1005
1006void inlines__tree_insert(struct rb_root_cached *tree,
1007 struct inline_node *inlines)
1008{
1009 struct rb_node **p = &tree->rb_root.rb_node;
1010 struct rb_node *parent = NULL;
1011 const u64 addr = inlines->addr;
1012 struct inline_node *i;
1013 bool leftmost = true;
1014
1015 while (*p != NULL) {
1016 parent = *p;
1017 i = rb_entry(parent, struct inline_node, rb_node);
1018 if (addr < i->addr)
1019 p = &(*p)->rb_left;
1020 else {
1021 p = &(*p)->rb_right;
1022 leftmost = false;
1023 }
1024 }
1025 rb_link_node(&inlines->rb_node, parent, p);
1026 rb_insert_color_cached(&inlines->rb_node, tree, leftmost);
1027}
1028
1029struct inline_node *inlines__tree_find(struct rb_root_cached *tree, u64 addr)
1030{
1031 struct rb_node *n = tree->rb_root.rb_node;
1032
1033 while (n) {
1034 struct inline_node *i = rb_entry(n, struct inline_node,
1035 rb_node);
1036
1037 if (addr < i->addr)
1038 n = n->rb_left;
1039 else if (addr > i->addr)
1040 n = n->rb_right;
1041 else
1042 return i;
1043 }
1044
1045 return NULL;
1046}
1047
1048void inlines__tree_delete(struct rb_root_cached *tree)
1049{
1050 struct inline_node *pos;
1051 struct rb_node *next = rb_first_cached(tree);
1052
1053 while (next) {
1054 pos = rb_entry(next, struct inline_node, rb_node);
1055 next = rb_next(&pos->rb_node);
1056 rb_erase_cached(&pos->rb_node, tree);
1057 inline_node__delete(pos);
1058 }
1059}