4 * Babeltrace - Executable and Shared Object Debug Info Reader
6 * Copyright 2015 Antoine Busque <abusque@efficios.com>
8 * Author: Antoine Busque <abusque@efficios.com>
10 * Permission is hereby granted, free of charge, to any person obtaining a copy
11 * of this software and associated documentation files (the "Software"), to deal
12 * in the Software without restriction, including without limitation the rights
13 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
14 * copies of the Software, and to permit persons to whom the Software is
15 * furnished to do so, subject to the following conditions:
17 * The above copyright notice and this permission notice shall be included in
18 * all copies or substantial portions of the Software.
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
23 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
25 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
39 #include <babeltrace/dwarf.h>
40 #include <babeltrace/bin-info.h>
41 #include <babeltrace/crc32.h>
42 #include <babeltrace/babeltrace-internal.h>
43 #include <babeltrace/utils.h>
46 * An address printed in hex is at most 20 bytes (16 for 64-bits +
47 * leading 0x + optional leading '+' if addr is an offset + null
50 #define ADDR_STR_LEN 20
53 int bin_info_init(void)
57 if (elf_version(EV_CURRENT
) == EV_NONE
) {
58 printf_debug("ELF library initialization failed: %s\n",
67 struct bin_info
*bin_info_create(const char *path
, uint64_t low_addr
,
68 uint64_t memsz
, bool is_pic
)
70 struct bin_info
*bin
= NULL
;
76 bin
= g_new0(struct bin_info
, 1);
81 if (opt_debug_info_target_prefix
) {
82 bin
->elf_path
= g_build_path("/", opt_debug_info_target_prefix
,
85 bin
->elf_path
= strdup(path
);
94 bin
->low_addr
= low_addr
;
95 bin
->high_addr
= bin
->low_addr
+ bin
->memsz
;
100 bin_info_destroy(bin
);
105 void bin_info_destroy(struct bin_info
*bin
)
111 dwarf_end(bin
->dwarf_info
);
114 free(bin
->dwarf_path
);
116 free(bin
->dbg_link_filename
);
118 elf_end(bin
->elf_file
);
121 close(bin
->dwarf_fd
);
128 int bin_info_set_build_id(struct bin_info
*bin
, uint8_t *build_id
,
131 if (!bin
|| !build_id
) {
135 bin
->build_id
= malloc(build_id_len
);
136 if (!bin
->build_id
) {
140 memcpy(bin
->build_id
, build_id
, build_id_len
);
141 bin
->build_id_len
= build_id_len
;
144 * Reset the is_elf_only flag in case it had been set
145 * previously, because we might find separate debug info using
146 * the new build id information.
148 bin
->is_elf_only
= false;
158 int bin_info_set_debug_link(struct bin_info
*bin
, char *filename
, uint32_t crc
)
160 if (!bin
|| !filename
) {
164 bin
->dbg_link_filename
= strdup(filename
);
165 if (!bin
->dbg_link_filename
) {
169 bin
->dbg_link_crc
= crc
;
172 * Reset the is_elf_only flag in case it had been set
173 * previously, because we might find separate debug info using
174 * the new build id information.
176 bin
->is_elf_only
= false;
186 * Tries to read DWARF info from the location given by path, and
187 * attach it to the given bin_info instance if it exists.
189 * @param bin bin_info instance for which to set DWARF info
190 * @param path Presumed location of the DWARF info
191 * @returns 0 on success, -1 on failure
194 int bin_info_set_dwarf_info_from_path(struct bin_info
*bin
, char *path
)
196 int fd
= -1, ret
= 0;
197 struct bt_dwarf_cu
*cu
= NULL
;
198 Dwarf
*dwarf_info
= NULL
;
204 fd
= open(path
, O_RDONLY
);
209 dwarf_info
= dwarf_begin(fd
, DWARF_C_READ
);
215 * Check if the dwarf info has any CU. If not, the
216 * executable's object file contains no DWARF info.
218 cu
= bt_dwarf_cu_create(dwarf_info
);
223 ret
= bt_dwarf_cu_next(cu
);
229 bin
->dwarf_path
= strdup(path
);
230 if (!bin
->dwarf_path
) {
233 bin
->dwarf_info
= dwarf_info
;
240 dwarf_end(dwarf_info
);
248 * Try to set the dwarf_info for a given bin_info instance via the
251 * @param bin bin_info instance for which to retrieve the
252 * DWARF info via build ID
253 * @returns 0 on success (i.e. dwarf_info set), -1 on failure
256 int bin_info_set_dwarf_info_build_id(struct bin_info
*bin
)
259 char *path
= NULL
, *build_id_file
= NULL
;
260 const char *dbg_dir
= NULL
;
261 size_t build_id_file_len
;
263 if (!bin
|| !bin
->build_id
) {
267 dbg_dir
= opt_debug_info_dir
? : DEFAULT_DEBUG_DIR
;
269 /* 2 characters per byte printed in hex, +1 for '/' and +1 for '\0' */
270 build_id_file_len
= (2 * bin
->build_id_len
) + 1 +
271 strlen(BUILD_ID_SUFFIX
) + 1;
272 build_id_file
= malloc(build_id_file_len
);
273 if (!build_id_file
) {
277 snprintf(build_id_file
, 4, "%02x/", bin
->build_id
[0]);
278 for (i
= 1; i
< bin
->build_id_len
; ++i
) {
279 int path_idx
= 3 + 2 * (i
- 1);
281 snprintf(&build_id_file
[path_idx
], 3, "%02x", bin
->build_id
[i
]);
283 strcat(build_id_file
, BUILD_ID_SUFFIX
);
285 path
= g_build_path("/", dbg_dir
, BUILD_ID_SUBDIR
, build_id_file
, NULL
);
290 ret
= bin_info_set_dwarf_info_from_path(bin
, path
);
307 * Tests whether the file located at path exists and has the expected
310 * This predicate is used when looking up separate debug info via the
311 * GNU debuglink method. The expected crc can be found .gnu_debuglink
312 * section in the original ELF file, along with the filename for the
313 * file containing the debug info.
315 * @param path Full path at which to look for the debug file
316 * @param crc Expected checksum for the debug file
317 * @returns 1 if the file exists and has the correct checksum,
321 int is_valid_debug_file(char *path
, uint32_t crc
)
323 int ret
= 0, fd
= -1;
330 fd
= open(path
, O_RDONLY
);
335 ret
= crc32(fd
, &_crc
);
349 * Try to set the dwarf_info for a given bin_info instance via the
352 * @param bin bin_info instance for which to retrieve the
353 * DWARF info via debug link
354 * @returns 0 on success (i.e. dwarf_info set), -1 on failure
357 int bin_info_set_dwarf_info_debug_link(struct bin_info
*bin
)
360 const char *dbg_dir
= NULL
;
361 char *dir_name
= NULL
, *bin_dir
= NULL
, *path
= NULL
;
362 size_t max_path_len
= 0;
364 if (!bin
|| !bin
->dbg_link_filename
) {
368 dbg_dir
= opt_debug_info_dir
? : DEFAULT_DEBUG_DIR
;
370 dir_name
= dirname(bin
->elf_path
);
375 /* bin_dir is just dir_name with a trailing slash */
376 bin_dir
= malloc(strlen(dir_name
) + 2);
381 strcpy(bin_dir
, dir_name
);
382 strcat(bin_dir
, "/");
384 max_path_len
= strlen(dbg_dir
) + strlen(bin_dir
) +
385 strlen(DEBUG_SUBDIR
) + strlen(bin
->dbg_link_filename
)
387 path
= malloc(max_path_len
);
392 /* First look in the executable's dir */
393 strcpy(path
, bin_dir
);
394 strcat(path
, bin
->dbg_link_filename
);
396 if (is_valid_debug_file(path
, bin
->dbg_link_crc
)) {
400 /* If not found, look in .debug subdir */
401 strcpy(path
, bin_dir
);
402 strcat(path
, DEBUG_SUBDIR
);
403 strcat(path
, bin
->dbg_link_filename
);
405 if (is_valid_debug_file(path
, bin
->dbg_link_crc
)) {
409 /* Lastly, look under the global debug directory */
410 strcpy(path
, dbg_dir
);
411 strcat(path
, bin_dir
);
412 strcat(path
, bin
->dbg_link_filename
);
414 if (is_valid_debug_file(path
, bin
->dbg_link_crc
)) {
427 ret
= bin_info_set_dwarf_info_from_path(bin
, path
);
436 * Initialize the DWARF info for a given executable.
438 * @param bin bin_info instance
439 * @returns 0 on success, -1 on failure
442 int bin_info_set_dwarf_info(struct bin_info
*bin
)
450 /* First try to set the DWARF info from the ELF file */
451 ret
= bin_info_set_dwarf_info_from_path(bin
, bin
->elf_path
);
457 * If that fails, try to find separate debug info via build ID
460 ret
= bin_info_set_dwarf_info_build_id(bin
);
465 ret
= bin_info_set_dwarf_info_debug_link(bin
);
477 * Initialize the ELF file for a given executable.
479 * @param bin bin_info instance
480 * @returns 0 on success, -1 on failure
483 int bin_info_set_elf_file(struct bin_info
*bin
)
486 Elf
*elf_file
= NULL
;
492 elf_fd
= open(bin
->elf_path
, O_RDONLY
);
494 printf_verbose("Failed to open %s\n", bin
->elf_path
);
498 elf_file
= elf_begin(elf_fd
, ELF_C_READ
, NULL
);
500 printf_debug("elf_begin failed: %s\n", elf_errmsg(-1));
504 if (elf_kind(elf_file
) != ELF_K_ELF
) {
505 printf_verbose("Error: %s is not an ELF object\n",
510 bin
->elf_fd
= elf_fd
;
511 bin
->elf_file
= elf_file
;
523 void source_location_destroy(struct source_location
*src_loc
)
529 free(src_loc
->filename
);
534 * Append a string representation of an address offset to an existing
537 * On success, the out parameter `result` will contain the base string
538 * followed by the offset string of the form "+0x1234". On failure,
539 * `result` remains unchanged.
541 * @param base_str The string to which to append an offset string
542 * @param low_addr The lower virtual memory address, the base from
543 * which the offset is computed
544 * @param high_addr The higher virtual memory address
545 * @param result Out parameter, the base string followed by the
547 * @returns 0 on success, -1 on failure
550 int bin_info_append_offset_str(const char *base_str
, uint64_t low_addr
,
551 uint64_t high_addr
, char **result
)
555 char *_result
= NULL
;
556 char offset_str
[ADDR_STR_LEN
];
558 if (!base_str
|| !result
) {
562 offset
= high_addr
- low_addr
;
564 _result
= malloc(strlen(base_str
) + ADDR_STR_LEN
);
569 ret
= snprintf(offset_str
, ADDR_STR_LEN
, "+%#0" PRIx64
, offset
);
573 strcpy(_result
, base_str
);
574 strcat(_result
, offset_str
);
585 * Try to find the symbol closest to an address within a given ELF
588 * Only function symbols are taken into account. The symbol's address
589 * must precede `addr`. A symbol with a closer address might exist
590 * after `addr` but is irrelevant because it cannot encompass `addr`.
592 * On success, if found, the out parameters `sym` and `shdr` are
593 * set. On failure or if none are found, they remain unchanged.
595 * @param scn ELF section in which to look for the address
596 * @param addr Virtual memory address for which to find the
597 * nearest function symbol
598 * @param sym Out parameter, the nearest function symbol
599 * @param shdr Out parameter, the section header for scn
600 * @returns 0 on success, -1 on failure
603 int bin_info_get_nearest_symbol_from_section(Elf_Scn
*scn
, uint64_t addr
,
604 GElf_Sym
**sym
, GElf_Shdr
**shdr
)
608 Elf_Data
*data
= NULL
;
609 GElf_Shdr
*_shdr
= NULL
;
610 GElf_Sym
*nearest_sym
= NULL
;
612 if (!scn
|| !sym
|| !shdr
) {
616 _shdr
= g_new0(GElf_Shdr
, 1);
621 _shdr
= gelf_getshdr(scn
, _shdr
);
626 if (_shdr
->sh_type
!= SHT_SYMTAB
) {
628 * We are only interested in symbol table (symtab)
629 * sections, skip this one.
634 data
= elf_getdata(scn
, NULL
);
639 symbol_count
= _shdr
->sh_size
/ _shdr
->sh_entsize
;
641 for (i
= 0; i
< symbol_count
; ++i
) {
642 GElf_Sym
*cur_sym
= NULL
;
644 cur_sym
= g_new0(GElf_Sym
, 1);
648 cur_sym
= gelf_getsym(data
, i
, cur_sym
);
652 if (GELF_ST_TYPE(cur_sym
->st_info
) != STT_FUNC
) {
653 /* We're only interested in the functions. */
658 if (cur_sym
->st_value
<= addr
&&
660 cur_sym
->st_value
> nearest_sym
->st_value
)) {
662 nearest_sym
= cur_sym
;
685 * Get the name of the function containing a given address within an
686 * executable using ELF symbols.
688 * The function name is in fact the name of the nearest ELF symbol,
689 * followed by the offset in bytes between the address and the symbol
690 * (in hex), separated by a '+' character.
692 * If found, the out parameter `func_name` is set on success. On failure,
693 * it remains unchanged.
695 * @param bin bin_info instance for the executable containing
697 * @param addr Virtual memory address for which to find the
699 * @param func_name Out parameter, the function name
700 * @returns 0 on success, -1 on failure
703 int bin_info_lookup_elf_function_name(struct bin_info
*bin
, uint64_t addr
,
707 * TODO (possible optimisation): if an ELF has no symtab
708 * section, it has been stripped. Therefore, it would be wise
709 * to store a flag indicating the stripped status after the
710 * first iteration to prevent subsequent ones.
714 GElf_Sym
*sym
= NULL
;
715 GElf_Shdr
*shdr
= NULL
;
716 char *sym_name
= NULL
;
718 /* Set ELF file if it hasn't been accessed yet. */
719 if (!bin
->elf_file
) {
720 ret
= bin_info_set_elf_file(bin
);
722 /* Failed to set ELF file. */
727 scn
= elf_nextscn(bin
->elf_file
, scn
);
732 while (scn
&& !sym
) {
733 ret
= bin_info_get_nearest_symbol_from_section(
734 scn
, addr
, &sym
, &shdr
);
739 scn
= elf_nextscn(bin
->elf_file
, scn
);
743 sym_name
= elf_strptr(bin
->elf_file
, shdr
->sh_link
,
749 ret
= bin_info_append_offset_str(sym_name
, sym
->st_value
, addr
,
767 * Get the name of the function containing a given address within a
768 * given compile unit (CU).
770 * If found, the out parameter `func_name` is set on success. On
771 * failure, it remains unchanged.
773 * @param cu bt_dwarf_cu instance which may contain the address
774 * @param addr Virtual memory address for which to find the
776 * @param func_name Out parameter, the function name
777 * @returns 0 on success, -1 on failure
780 int bin_info_lookup_cu_function_name(struct bt_dwarf_cu
*cu
, uint64_t addr
,
785 struct bt_dwarf_die
*die
= NULL
;
787 if (!cu
|| !func_name
) {
791 die
= bt_dwarf_die_create(cu
);
796 while (bt_dwarf_die_next(die
) == 0) {
799 ret
= bt_dwarf_die_get_tag(die
, &tag
);
804 if (tag
== DW_TAG_subprogram
) {
805 ret
= bt_dwarf_die_contains_addr(die
, addr
, &found
);
817 uint64_t low_addr
= 0;
818 char *die_name
= NULL
;
820 ret
= bt_dwarf_die_get_name(die
, &die_name
);
825 ret
= dwarf_lowpc(die
->dwarf_die
, &low_addr
);
830 ret
= bin_info_append_offset_str(die_name
, low_addr
, addr
,
837 bt_dwarf_die_destroy(die
);
841 bt_dwarf_die_destroy(die
);
846 * Get the name of the function containing a given address within an
847 * executable using DWARF debug info.
849 * If found, the out parameter `func_name` is set on success. On
850 * failure, it remains unchanged.
852 * @param bin bin_info instance for the executable containing
854 * @param addr Virtual memory address for which to find the
856 * @param func_name Out parameter, the function name
857 * @returns 0 on success, -1 on failure
860 int bin_info_lookup_dwarf_function_name(struct bin_info
*bin
, uint64_t addr
,
864 char *_func_name
= NULL
;
865 struct bt_dwarf_cu
*cu
= NULL
;
867 if (!bin
|| !func_name
) {
871 cu
= bt_dwarf_cu_create(bin
->dwarf_info
);
876 while (bt_dwarf_cu_next(cu
) == 0) {
877 ret
= bin_info_lookup_cu_function_name(cu
, addr
, &_func_name
);
888 *func_name
= _func_name
;
893 bt_dwarf_cu_destroy(cu
);
897 bt_dwarf_cu_destroy(cu
);
902 int bin_info_lookup_function_name(struct bin_info
*bin
, uint64_t addr
,
906 char *_func_name
= NULL
;
908 if (!bin
|| !func_name
) {
912 /* Set DWARF info if it hasn't been accessed yet. */
913 if (!bin
->dwarf_info
&& !bin
->is_elf_only
) {
914 ret
= bin_info_set_dwarf_info(bin
);
916 /* Failed to set DWARF info, fallback to ELF. */
917 bin
->is_elf_only
= true;
921 if (!bin_info_has_address(bin
, addr
)) {
926 * Addresses in ELF and DWARF are relative to base address for
927 * PIC, so make the address argument relative too if needed.
930 addr
-= bin
->low_addr
;
933 if (bin
->is_elf_only
) {
934 ret
= bin_info_lookup_elf_function_name(bin
, addr
, &_func_name
);
936 ret
= bin_info_lookup_dwarf_function_name(bin
, addr
, &_func_name
);
939 if (ret
|| !_func_name
) {
943 *func_name
= _func_name
;
951 int bin_info_get_bin_loc(struct bin_info
*bin
, uint64_t addr
, char **bin_loc
)
954 char *_bin_loc
= NULL
;
956 if (!bin
|| !bin_loc
) {
961 addr
-= bin
->low_addr
;
962 ret
= asprintf(&_bin_loc
, "+%#0" PRIx64
, addr
);
964 ret
= asprintf(&_bin_loc
, "@%#0" PRIx64
, addr
);
967 if (ret
== -1 || !_bin_loc
) {
979 * Predicate used to determine whether the children of a given DIE
980 * contain a specific address.
982 * More specifically, the parameter `die` is expected to be a
983 * subprogram (function) DIE, and this predicate tells whether any
984 * subroutines are inlined within this function and would contain
987 * On success, the out parameter `contains` is set with the boolean
988 * value indicating whether the DIE's range covers `addr`. On failure,
989 * it remains unchanged.
991 * Do note that this function advances the position of `die`. If the
992 * address is found within one of its children, `die` will be pointing
993 * to that child upon returning from the function, allowing to extract
994 * the information deemed necessary.
996 * @param die The parent DIE in whose children the address will be
998 * @param addr The address for which to look for in the DIEs
999 * @param contains Out parameter, true if addr is contained,
1001 * @returns Returns 0 on success, -1 on failure
1004 int bin_info_child_die_has_address(struct bt_dwarf_die
*die
, uint64_t addr
, bool *contains
)
1007 bool _contains
= false;
1013 ret
= bt_dwarf_die_child(die
);
1021 ret
= bt_dwarf_die_get_tag(die
, &tag
);
1026 if (tag
== DW_TAG_inlined_subroutine
) {
1027 ret
= bt_dwarf_die_contains_addr(die
, addr
, &_contains
);
1036 } while (bt_dwarf_die_next(die
) == 0);
1039 *contains
= _contains
;
1047 * Lookup the source location for a given address within a CU, making
1048 * the assumption that it is contained within an inline routine in a
1051 * @param cu bt_dwarf_cu instance in which to look for the address
1052 * @param addr The address for which to look for
1053 * @param src_loc Out parameter, the source location (filename and
1054 * line number) for the address
1055 * @returns 0 on success, -1 on failure
1058 int bin_info_lookup_cu_src_loc_inl(struct bt_dwarf_cu
*cu
, uint64_t addr
,
1059 struct source_location
**src_loc
)
1063 struct bt_dwarf_die
*die
= NULL
;
1064 struct source_location
*_src_loc
= NULL
;
1066 if (!cu
|| !src_loc
) {
1070 die
= bt_dwarf_die_create(cu
);
1075 while (bt_dwarf_die_next(die
) == 0) {
1078 ret
= bt_dwarf_die_get_tag(die
, &tag
);
1083 if (tag
== DW_TAG_subprogram
) {
1084 bool contains
= false;
1086 ret
= bt_dwarf_die_contains_addr(die
, addr
, &contains
);
1093 * Try to find an inlined subroutine
1094 * child of this DIE containing addr.
1096 ret
= bin_info_child_die_has_address(die
, addr
,
1109 char *filename
= NULL
;
1112 _src_loc
= g_new0(struct source_location
, 1);
1117 ret
= bt_dwarf_die_get_call_file(die
, &filename
);
1121 ret
= bt_dwarf_die_get_call_line(die
, &line_no
);
1127 _src_loc
->filename
= filename
;
1128 _src_loc
->line_no
= line_no
;
1129 *src_loc
= _src_loc
;
1132 bt_dwarf_die_destroy(die
);
1136 source_location_destroy(_src_loc
);
1137 bt_dwarf_die_destroy(die
);
1142 * Lookup the source location for a given address within a CU,
1143 * assuming that it is contained within an inlined function.
1145 * A source location can be found regardless of inlining status for
1146 * this method, but in the case of an inlined function, the returned
1147 * source location will point not to the callsite but rather to the
1148 * definition site of the inline function.
1150 * @param cu bt_dwarf_cu instance in which to look for the address
1151 * @param addr The address for which to look for
1152 * @param src_loc Out parameter, the source location (filename and
1153 * line number) for the address
1154 * @returns 0 on success, -1 on failure
1157 int bin_info_lookup_cu_src_loc_no_inl(struct bt_dwarf_cu
*cu
, uint64_t addr
,
1158 struct source_location
**src_loc
)
1160 struct source_location
*_src_loc
= NULL
;
1161 struct bt_dwarf_die
*die
= NULL
;
1162 const char *filename
= NULL
;
1163 Dwarf_Line
*line
= NULL
;
1164 Dwarf_Addr line_addr
;
1167 if (!cu
|| !src_loc
) {
1171 die
= bt_dwarf_die_create(cu
);
1176 line
= dwarf_getsrc_die(die
->dwarf_die
, addr
);
1181 ret
= dwarf_lineaddr(line
, &line_addr
);
1186 filename
= dwarf_linesrc(line
, NULL
, NULL
);
1191 if (addr
== line_addr
) {
1192 _src_loc
= g_new0(struct source_location
, 1);
1197 ret
= dwarf_lineno(line
, &line_no
);
1202 _src_loc
->line_no
= line_no
;
1203 _src_loc
->filename
= strdup(filename
);
1206 bt_dwarf_die_destroy(die
);
1209 *src_loc
= _src_loc
;
1215 source_location_destroy(_src_loc
);
1216 bt_dwarf_die_destroy(die
);
1221 * Get the source location (file name and line number) for a given
1222 * address within a compile unit (CU).
1224 * On success, the out parameter `src_loc` is set if found. On
1225 * failure, it remains unchanged.
1227 * @param cu bt_dwarf_cu instance for the compile unit which
1228 * may contain the address
1229 * @param addr Virtual memory address for which to find the
1231 * @param src_loc Out parameter, the source location
1232 * @returns 0 on success, -1 on failure
1235 int bin_info_lookup_cu_src_loc(struct bt_dwarf_cu
*cu
, uint64_t addr
,
1236 struct source_location
**src_loc
)
1239 struct source_location
*_src_loc
= NULL
;
1241 if (!cu
|| !src_loc
) {
1245 ret
= bin_info_lookup_cu_src_loc_inl(cu
, addr
, &_src_loc
);
1254 ret
= bin_info_lookup_cu_src_loc_no_inl(cu
, addr
, &_src_loc
);
1265 *src_loc
= _src_loc
;
1271 source_location_destroy(_src_loc
);
1276 int bin_info_lookup_source_location(struct bin_info
*bin
, uint64_t addr
,
1277 struct source_location
**src_loc
)
1279 struct bt_dwarf_cu
*cu
= NULL
;
1280 struct source_location
*_src_loc
= NULL
;
1282 if (!bin
|| !src_loc
) {
1286 /* Set DWARF info if it hasn't been accessed yet. */
1287 if (!bin
->dwarf_info
&& !bin
->is_elf_only
) {
1288 if (bin_info_set_dwarf_info(bin
)) {
1289 /* Failed to set DWARF info. */
1290 bin
->is_elf_only
= true;
1294 if (bin
->is_elf_only
) {
1295 /* We cannot lookup source location without DWARF info. */
1299 if (!bin_info_has_address(bin
, addr
)) {
1304 * Addresses in ELF and DWARF are relative to base address for
1305 * PIC, so make the address argument relative too if needed.
1308 addr
-= bin
->low_addr
;
1311 cu
= bt_dwarf_cu_create(bin
->dwarf_info
);
1316 while (bt_dwarf_cu_next(cu
) == 0) {
1319 ret
= bin_info_lookup_cu_src_loc(cu
, addr
, &_src_loc
);
1329 bt_dwarf_cu_destroy(cu
);
1331 *src_loc
= _src_loc
;
1337 source_location_destroy(_src_loc
);
1338 bt_dwarf_cu_destroy(cu
);