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dwarf-aux.h
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1 #ifndef _DWARF_AUX_H
2 #define _DWARF_AUX_H
3 /*
4  * dwarf-aux.h : libdw auxiliary interfaces
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19  *
20  */
21 
22 #include <dwarf.h>
23 #include <elfutils/libdw.h>
24 #include <elfutils/libdwfl.h>
25 #include <elfutils/version.h>
26 
27 /* Find the realpath of the target file */
28 extern const char *cu_find_realpath(Dwarf_Die *cu_die, const char *fname);
29 
30 /* Get DW_AT_comp_dir (should be NULL with older gcc) */
31 extern const char *cu_get_comp_dir(Dwarf_Die *cu_die);
32 
33 /* Get a line number and file name for given address */
34 extern int cu_find_lineinfo(Dwarf_Die *cudie, unsigned long addr,
35  const char **fname, int *lineno);
36 
37 /* Walk on funcitons at given address */
38 extern int cu_walk_functions_at(Dwarf_Die *cu_die, Dwarf_Addr addr,
39  int (*callback)(Dwarf_Die *, void *), void *data);
40 
41 /* Compare diename and tname */
42 extern bool die_compare_name(Dwarf_Die *dw_die, const char *tname);
43 
44 /* Get callsite line number of inline-function instance */
45 extern int die_get_call_lineno(Dwarf_Die *in_die);
46 
47 /* Get callsite file name of inlined function instance */
48 extern const char *die_get_call_file(Dwarf_Die *in_die);
49 
50 /* Get type die */
51 extern Dwarf_Die *die_get_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem);
52 
53 /* Get a type die, but skip qualifiers and typedef */
54 extern Dwarf_Die *die_get_real_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem);
55 
56 /* Check whether the DIE is signed or not */
57 extern bool die_is_signed_type(Dwarf_Die *tp_die);
58 
59 /* Get data_member_location offset */
60 extern int die_get_data_member_location(Dwarf_Die *mb_die, Dwarf_Word *offs);
61 
62 /* Return values for die_find_child() callbacks */
63 enum {
64  DIE_FIND_CB_END = 0, /* End of Search */
65  DIE_FIND_CB_CHILD = 1, /* Search only children */
66  DIE_FIND_CB_SIBLING = 2, /* Search only siblings */
67  DIE_FIND_CB_CONTINUE = 3, /* Search children and siblings */
68 };
69 
70 /* Search child DIEs */
71 extern Dwarf_Die *die_find_child(Dwarf_Die *rt_die,
72  int (*callback)(Dwarf_Die *, void *),
73  void *data, Dwarf_Die *die_mem);
74 
75 /* Search a non-inlined function including given address */
76 extern Dwarf_Die *die_find_realfunc(Dwarf_Die *cu_die, Dwarf_Addr addr,
77  Dwarf_Die *die_mem);
78 
79 /* Search an inlined function including given address */
80 extern Dwarf_Die *die_find_inlinefunc(Dwarf_Die *sp_die, Dwarf_Addr addr,
81  Dwarf_Die *die_mem);
82 
83 /* Walk on the instances of given DIE */
84 extern int die_walk_instances(Dwarf_Die *in_die,
85  int (*callback)(Dwarf_Die *, void *), void *data);
86 
87 /* Walker on lines (Note: line number will not be sorted) */
88 typedef int (* line_walk_callback_t) (const char *fname, int lineno,
89  Dwarf_Addr addr, void *data);
90 
91 /*
92  * Walk on lines inside given DIE. If the DIE is a subprogram, walk only on
93  * the lines inside the subprogram, otherwise the DIE must be a CU DIE.
94  */
95 extern int die_walk_lines(Dwarf_Die *rt_die, line_walk_callback_t callback,
96  void *data);
97 
98 /* Find a variable called 'name' at given address */
99 extern Dwarf_Die *die_find_variable_at(Dwarf_Die *sp_die, const char *name,
100  Dwarf_Addr addr, Dwarf_Die *die_mem);
101 
102 /* Find a member called 'name' */
103 extern Dwarf_Die *die_find_member(Dwarf_Die *st_die, const char *name,
104  Dwarf_Die *die_mem);
105 
106 /* Get the name of given variable DIE */
107 extern int die_get_typename(Dwarf_Die *vr_die, char *buf, int len);
108 
109 /* Get the name and type of given variable DIE, stored as "type\tname" */
110 extern int die_get_varname(Dwarf_Die *vr_die, char *buf, int len);
111 #endif