dwarf-aux.h (4551B)
1/* SPDX-License-Identifier: GPL-2.0-or-later */ 2#ifndef _DWARF_AUX_H 3#define _DWARF_AUX_H 4/* 5 * dwarf-aux.h : libdw auxiliary interfaces 6 */ 7 8#include <dwarf.h> 9#include <elfutils/libdw.h> 10#include <elfutils/libdwfl.h> 11#include <elfutils/version.h> 12 13struct strbuf; 14 15/* Find the realpath of the target file */ 16const char *cu_find_realpath(Dwarf_Die *cu_die, const char *fname); 17 18/* Get DW_AT_comp_dir (should be NULL with older gcc) */ 19const char *cu_get_comp_dir(Dwarf_Die *cu_die); 20 21/* Get a line number and file name for given address */ 22int cu_find_lineinfo(Dwarf_Die *cudie, Dwarf_Addr addr, 23 const char **fname, int *lineno); 24 25/* Walk on functions at given address */ 26int cu_walk_functions_at(Dwarf_Die *cu_die, Dwarf_Addr addr, 27 int (*callback)(Dwarf_Die *, void *), void *data); 28 29/* Get DW_AT_linkage_name (should be NULL for C binary) */ 30const char *die_get_linkage_name(Dwarf_Die *dw_die); 31 32/* Get the lowest PC in DIE (including range list) */ 33int die_entrypc(Dwarf_Die *dw_die, Dwarf_Addr *addr); 34 35/* Ensure that this DIE is a subprogram and definition (not declaration) */ 36bool die_is_func_def(Dwarf_Die *dw_die); 37 38/* Ensure that this DIE is an instance of a subprogram */ 39bool die_is_func_instance(Dwarf_Die *dw_die); 40 41/* Compare diename and tname */ 42bool die_compare_name(Dwarf_Die *dw_die, const char *tname); 43 44/* Matching diename with glob pattern */ 45bool die_match_name(Dwarf_Die *dw_die, const char *glob); 46 47/* Get callsite line number of inline-function instance */ 48int die_get_call_lineno(Dwarf_Die *in_die); 49 50/* Get callsite file name of inlined function instance */ 51const char *die_get_call_file(Dwarf_Die *in_die); 52 53/* Get type die */ 54Dwarf_Die *die_get_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem); 55 56/* Get a type die, but skip qualifiers and typedef */ 57Dwarf_Die *die_get_real_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem); 58 59/* Check whether the DIE is signed or not */ 60bool die_is_signed_type(Dwarf_Die *tp_die); 61 62/* Get data_member_location offset */ 63int die_get_data_member_location(Dwarf_Die *mb_die, Dwarf_Word *offs); 64 65/* Return values for die_find_child() callbacks */ 66enum { 67 DIE_FIND_CB_END = 0, /* End of Search */ 68 DIE_FIND_CB_CHILD = 1, /* Search only children */ 69 DIE_FIND_CB_SIBLING = 2, /* Search only siblings */ 70 DIE_FIND_CB_CONTINUE = 3, /* Search children and siblings */ 71}; 72 73/* Search child DIEs */ 74Dwarf_Die *die_find_child(Dwarf_Die *rt_die, 75 int (*callback)(Dwarf_Die *, void *), 76 void *data, Dwarf_Die *die_mem); 77 78/* Search a non-inlined function including given address */ 79Dwarf_Die *die_find_realfunc(Dwarf_Die *cu_die, Dwarf_Addr addr, 80 Dwarf_Die *die_mem); 81 82/* Search a non-inlined function with tail call at given address */ 83Dwarf_Die *die_find_tailfunc(Dwarf_Die *cu_die, Dwarf_Addr addr, 84 Dwarf_Die *die_mem); 85 86/* Search the top inlined function including given address */ 87Dwarf_Die *die_find_top_inlinefunc(Dwarf_Die *sp_die, Dwarf_Addr addr, 88 Dwarf_Die *die_mem); 89 90/* Search the deepest inlined function including given address */ 91Dwarf_Die *die_find_inlinefunc(Dwarf_Die *sp_die, Dwarf_Addr addr, 92 Dwarf_Die *die_mem); 93 94/* Walk on the instances of given DIE */ 95int die_walk_instances(Dwarf_Die *in_die, 96 int (*callback)(Dwarf_Die *, void *), void *data); 97 98/* Walker on lines (Note: line number will not be sorted) */ 99typedef int (* line_walk_callback_t) (const char *fname, int lineno, 100 Dwarf_Addr addr, void *data); 101 102/* 103 * Walk on lines inside given DIE. If the DIE is a subprogram, walk only on 104 * the lines inside the subprogram, otherwise the DIE must be a CU DIE. 105 */ 106int die_walk_lines(Dwarf_Die *rt_die, line_walk_callback_t callback, void *data); 107 108/* Find a variable called 'name' at given address */ 109Dwarf_Die *die_find_variable_at(Dwarf_Die *sp_die, const char *name, 110 Dwarf_Addr addr, Dwarf_Die *die_mem); 111 112/* Find a member called 'name' */ 113Dwarf_Die *die_find_member(Dwarf_Die *st_die, const char *name, 114 Dwarf_Die *die_mem); 115 116/* Get the name of given variable DIE */ 117int die_get_typename(Dwarf_Die *vr_die, struct strbuf *buf); 118 119/* Get the name and type of given variable DIE, stored as "type\tname" */ 120int die_get_varname(Dwarf_Die *vr_die, struct strbuf *buf); 121int die_get_var_range(Dwarf_Die *sp_die, Dwarf_Die *vr_die, struct strbuf *buf); 122 123/* Check if target program is compiled with optimization */ 124bool die_is_optimized_target(Dwarf_Die *cu_die); 125 126/* Use next address after prologue as probe location */ 127void die_skip_prologue(Dwarf_Die *sp_die, Dwarf_Die *cu_die, 128 Dwarf_Addr *entrypc); 129 130#endif