1 // SPDX-License-Identifier: GPL-2.0
7 #include <linux/kernel.h>
10 #include "util/util.h"
11 #include "util/debug.h"
12 #include "util/callchain.h"
17 bool srcline_full_filename;
19 static const char *dso__name(struct dso *dso)
23 if (dso->symsrc_filename)
24 dso_name = dso->symsrc_filename;
26 dso_name = dso->long_name;
28 if (dso_name[0] == '[')
31 if (!strncmp(dso_name, "/tmp/perf-", 10))
37 static int inline_list__append(struct symbol *symbol, char *srcline,
38 struct inline_node *node)
40 struct inline_list *ilist;
42 ilist = zalloc(sizeof(*ilist));
46 ilist->symbol = symbol;
47 ilist->srcline = srcline;
49 if (callchain_param.order == ORDER_CALLEE)
50 list_add_tail(&ilist->list, &node->val);
52 list_add(&ilist->list, &node->val);
57 /* basename version that takes a const input string */
58 static const char *gnu_basename(const char *path)
60 const char *base = strrchr(path, '/');
62 return base ? base + 1 : path;
65 static char *srcline_from_fileline(const char *file, unsigned int line)
72 if (!srcline_full_filename)
73 file = gnu_basename(file);
75 if (asprintf(&srcline, "%s:%u", file, line) < 0)
81 static struct symbol *new_inline_sym(struct dso *dso,
82 struct symbol *base_sym,
85 struct symbol *inline_sym;
86 char *demangled = NULL;
92 demangled = dso__demangle_sym(dso, 0, funcname);
97 if (base_sym && strcmp(funcname, base_sym->name) == 0) {
98 /* reuse the real, existing symbol */
99 inline_sym = base_sym;
100 /* ensure that we don't alias an inlined symbol, which could
101 * lead to double frees in inline_node__delete
103 assert(!base_sym->inlined);
105 /* create a fake symbol for the inline frame */
106 inline_sym = symbol__new(base_sym ? base_sym->start : 0,
107 base_sym ? base_sym->end : 0,
108 base_sym ? base_sym->binding : 0,
109 base_sym ? base_sym->type : 0,
112 inline_sym->inlined = 1;
120 #ifdef HAVE_LIBBFD_SUPPORT
123 * Implement addr2line using libbfd.
125 #define PACKAGE "perf"
133 const char *filename;
134 const char *funcname;
141 static int bfd_error(const char *string)
145 errmsg = bfd_errmsg(bfd_get_error());
149 pr_debug("%s: %s\n", string, errmsg);
151 pr_debug("%s\n", errmsg);
156 static int slurp_symtab(bfd *abfd, struct a2l_data *a2l)
161 bfd_boolean dynamic = FALSE;
163 if ((bfd_get_file_flags(abfd) & HAS_SYMS) == 0)
164 return bfd_error(bfd_get_filename(abfd));
166 storage = bfd_get_symtab_upper_bound(abfd);
168 storage = bfd_get_dynamic_symtab_upper_bound(abfd);
172 return bfd_error(bfd_get_filename(abfd));
174 syms = malloc(storage);
176 symcount = bfd_canonicalize_dynamic_symtab(abfd, syms);
178 symcount = bfd_canonicalize_symtab(abfd, syms);
182 return bfd_error(bfd_get_filename(abfd));
189 static void find_address_in_section(bfd *abfd, asection *section, void *data)
193 struct a2l_data *a2l = data;
198 if ((bfd_get_section_flags(abfd, section) & SEC_ALLOC) == 0)
202 vma = bfd_get_section_vma(abfd, section);
203 size = bfd_get_section_size(section);
205 if (pc < vma || pc >= vma + size)
208 a2l->found = bfd_find_nearest_line(abfd, section, a2l->syms, pc - vma,
209 &a2l->filename, &a2l->funcname,
212 if (a2l->filename && !strlen(a2l->filename))
213 a2l->filename = NULL;
216 static struct a2l_data *addr2line_init(const char *path)
219 struct a2l_data *a2l = NULL;
221 abfd = bfd_openr(path, NULL);
225 if (!bfd_check_format(abfd, bfd_object))
228 a2l = zalloc(sizeof(*a2l));
233 a2l->input = strdup(path);
234 if (a2l->input == NULL)
237 if (slurp_symtab(abfd, a2l))
244 zfree((char **)&a2l->input);
251 static void addr2line_cleanup(struct a2l_data *a2l)
254 bfd_close(a2l->abfd);
255 zfree((char **)&a2l->input);
260 #define MAX_INLINE_NEST 1024
262 static int inline_list__append_dso_a2l(struct dso *dso,
263 struct inline_node *node,
266 struct a2l_data *a2l = dso->a2l;
267 struct symbol *inline_sym = new_inline_sym(dso, sym, a2l->funcname);
268 char *srcline = NULL;
271 srcline = srcline_from_fileline(a2l->filename, a2l->line);
273 return inline_list__append(inline_sym, srcline, node);
276 static int addr2line(const char *dso_name, u64 addr,
277 char **file, unsigned int *line, struct dso *dso,
278 bool unwind_inlines, struct inline_node *node,
282 struct a2l_data *a2l = dso->a2l;
285 dso->a2l = addr2line_init(dso_name);
290 pr_warning("addr2line_init failed for %s\n", dso_name);
297 bfd_map_over_sections(a2l->abfd, find_address_in_section, a2l);
302 if (unwind_inlines) {
305 if (node && inline_list__append_dso_a2l(dso, node, sym))
308 while (bfd_find_inliner_info(a2l->abfd, &a2l->filename,
309 &a2l->funcname, &a2l->line) &&
310 cnt++ < MAX_INLINE_NEST) {
312 if (a2l->filename && !strlen(a2l->filename))
313 a2l->filename = NULL;
316 if (inline_list__append_dso_a2l(dso, node, sym))
318 // found at least one inline frame
325 *file = a2l->filename ? strdup(a2l->filename) : NULL;
335 void dso__free_a2l(struct dso *dso)
337 struct a2l_data *a2l = dso->a2l;
342 addr2line_cleanup(a2l);
347 static struct inline_node *addr2inlines(const char *dso_name, u64 addr,
348 struct dso *dso, struct symbol *sym)
350 struct inline_node *node;
352 node = zalloc(sizeof(*node));
354 perror("not enough memory for the inline node");
358 INIT_LIST_HEAD(&node->val);
361 addr2line(dso_name, addr, NULL, NULL, dso, true, node, sym);
365 #else /* HAVE_LIBBFD_SUPPORT */
367 static int filename_split(char *filename, unsigned int *line_nr)
371 sep = strchr(filename, '\n');
375 if (!strcmp(filename, "??:0"))
378 sep = strchr(filename, ':');
381 *line_nr = strtoul(sep, NULL, 0);
388 static int addr2line(const char *dso_name, u64 addr,
389 char **file, unsigned int *line_nr,
390 struct dso *dso __maybe_unused,
391 bool unwind_inlines __maybe_unused,
392 struct inline_node *node __maybe_unused,
393 struct symbol *sym __maybe_unused)
397 char *filename = NULL;
401 scnprintf(cmd, sizeof(cmd), "addr2line -e %s %016"PRIx64,
404 fp = popen(cmd, "r");
406 pr_warning("popen failed for %s\n", dso_name);
410 if (getline(&filename, &len, fp) < 0 || !len) {
411 pr_warning("addr2line has no output for %s\n", dso_name);
415 ret = filename_split(filename, line_nr);
428 void dso__free_a2l(struct dso *dso __maybe_unused)
432 static struct inline_node *addr2inlines(const char *dso_name, u64 addr,
433 struct dso *dso __maybe_unused,
438 struct inline_node *node;
439 char *filename = NULL;
440 char *funcname = NULL;
441 size_t filelen, funclen;
442 unsigned int line_nr = 0;
444 scnprintf(cmd, sizeof(cmd), "addr2line -e %s -i -f %016"PRIx64,
447 fp = popen(cmd, "r");
449 pr_err("popen failed for %s\n", dso_name);
453 node = zalloc(sizeof(*node));
455 perror("not enough memory for the inline node");
459 INIT_LIST_HEAD(&node->val);
462 /* addr2line -f generates two lines for each inlined functions */
463 while (getline(&funcname, &funclen, fp) != -1) {
465 struct symbol *inline_sym;
469 if (getline(&filename, &filelen, fp) == -1)
472 if (filename_split(filename, &line_nr) != 1)
475 srcline = srcline_from_fileline(filename, line_nr);
476 inline_sym = new_inline_sym(dso, sym, funcname);
478 if (inline_list__append(inline_sym, srcline, node) != 0) {
480 if (inline_sym && inline_sym->inlined)
481 symbol__delete(inline_sym);
494 #endif /* HAVE_LIBBFD_SUPPORT */
497 * Number of addr2line failures (without success) before disabling it for that
500 #define A2L_FAIL_LIMIT 123
502 char *__get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
503 bool show_sym, bool show_addr, bool unwind_inlines,
509 const char *dso_name;
511 if (!dso->has_srcline)
514 dso_name = dso__name(dso);
515 if (dso_name == NULL)
518 if (!addr2line(dso_name, addr, &file, &line, dso,
519 unwind_inlines, NULL, sym))
522 srcline = srcline_from_fileline(file, line);
533 if (dso->a2l_fails && ++dso->a2l_fails > A2L_FAIL_LIMIT) {
534 dso->has_srcline = 0;
539 return (show_sym && sym) ?
540 strndup(sym->name, sym->namelen) : NULL;
543 if (asprintf(&srcline, "%s+%" PRIu64, show_sym ? sym->name : "",
544 ip - sym->start) < 0)
545 return SRCLINE_UNKNOWN;
546 } else if (asprintf(&srcline, "%s[%" PRIx64 "]", dso->short_name, addr) < 0)
547 return SRCLINE_UNKNOWN;
551 void free_srcline(char *srcline)
553 if (srcline && strcmp(srcline, SRCLINE_UNKNOWN) != 0)
557 char *get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
558 bool show_sym, bool show_addr, u64 ip)
560 return __get_srcline(dso, addr, sym, show_sym, show_addr, false, ip);
563 struct srcline_node {
566 struct rb_node rb_node;
569 void srcline__tree_insert(struct rb_root *tree, u64 addr, char *srcline)
571 struct rb_node **p = &tree->rb_node;
572 struct rb_node *parent = NULL;
573 struct srcline_node *i, *node;
575 node = zalloc(sizeof(struct srcline_node));
577 perror("not enough memory for the srcline node");
582 node->srcline = srcline;
586 i = rb_entry(parent, struct srcline_node, rb_node);
592 rb_link_node(&node->rb_node, parent, p);
593 rb_insert_color(&node->rb_node, tree);
596 char *srcline__tree_find(struct rb_root *tree, u64 addr)
598 struct rb_node *n = tree->rb_node;
601 struct srcline_node *i = rb_entry(n, struct srcline_node,
606 else if (addr > i->addr)
615 void srcline__tree_delete(struct rb_root *tree)
617 struct srcline_node *pos;
618 struct rb_node *next = rb_first(tree);
621 pos = rb_entry(next, struct srcline_node, rb_node);
622 next = rb_next(&pos->rb_node);
623 rb_erase(&pos->rb_node, tree);
624 free_srcline(pos->srcline);
629 struct inline_node *dso__parse_addr_inlines(struct dso *dso, u64 addr,
632 const char *dso_name;
634 dso_name = dso__name(dso);
635 if (dso_name == NULL)
638 return addr2inlines(dso_name, addr, dso, sym);
641 void inline_node__delete(struct inline_node *node)
643 struct inline_list *ilist, *tmp;
645 list_for_each_entry_safe(ilist, tmp, &node->val, list) {
646 list_del_init(&ilist->list);
647 free_srcline(ilist->srcline);
648 /* only the inlined symbols are owned by the list */
649 if (ilist->symbol && ilist->symbol->inlined)
650 symbol__delete(ilist->symbol);
657 void inlines__tree_insert(struct rb_root *tree, struct inline_node *inlines)
659 struct rb_node **p = &tree->rb_node;
660 struct rb_node *parent = NULL;
661 const u64 addr = inlines->addr;
662 struct inline_node *i;
666 i = rb_entry(parent, struct inline_node, rb_node);
672 rb_link_node(&inlines->rb_node, parent, p);
673 rb_insert_color(&inlines->rb_node, tree);
676 struct inline_node *inlines__tree_find(struct rb_root *tree, u64 addr)
678 struct rb_node *n = tree->rb_node;
681 struct inline_node *i = rb_entry(n, struct inline_node,
686 else if (addr > i->addr)
695 void inlines__tree_delete(struct rb_root *tree)
697 struct inline_node *pos;
698 struct rb_node *next = rb_first(tree);
701 pos = rb_entry(next, struct inline_node, rb_node);
702 next = rb_next(&pos->rb_node);
703 rb_erase(&pos->rb_node, tree);
704 inline_node__delete(pos);