tools/perf/util/dwarf-aux.h

   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 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 const char *cu_get_comp_dir(Dwarf_Die *cu_die);
  32
  33 /* Get a line number and file name for given address */
  34 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 int cu_walk_functions_at(Dwarf_Die *cu_die, Dwarf_Addr addr,
  39                          int (*callback)(Dwarf_Die *, void *), void *data);
  40
  41 /* Get DW_AT_linkage_name (should be NULL for C binary) */
  42 const char *die_get_linkage_name(Dwarf_Die *dw_die);
  43
  44 /* Ensure that this DIE is a subprogram and definition (not declaration) */
  45 bool die_is_func_def(Dwarf_Die *dw_die);
  46
  47 /* Ensure that this DIE is an instance of a subprogram */
  48 bool die_is_func_instance(Dwarf_Die *dw_die);
  49
  50 /* Compare diename and tname */
  51 bool die_compare_name(Dwarf_Die *dw_die, const char *tname);
  52
  53 /* Matching diename with glob pattern */
  54 bool die_match_name(Dwarf_Die *dw_die, const char *glob);
  55
  56 /* Get callsite line number of inline-function instance */
  57 int die_get_call_lineno(Dwarf_Die *in_die);
  58
  59 /* Get callsite file name of inlined function instance */
  60 const char *die_get_call_file(Dwarf_Die *in_die);
  61
  62 /* Get type die */
  63 Dwarf_Die *die_get_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem);
  64
  65 /* Get a type die, but skip qualifiers and typedef */
  66 Dwarf_Die *die_get_real_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem);
  67
  68 /* Check whether the DIE is signed or not */
  69 bool die_is_signed_type(Dwarf_Die *tp_die);
  70
  71 /* Get data_member_location offset */
  72 int die_get_data_member_location(Dwarf_Die *mb_die, Dwarf_Word *offs);
  73
  74 /* Return values for die_find_child() callbacks */
  75 enum {
  76         DIE_FIND_CB_END = 0,            /* End of Search */
  77         DIE_FIND_CB_CHILD = 1,          /* Search only children */
  78         DIE_FIND_CB_SIBLING = 2,        /* Search only siblings */
  79         DIE_FIND_CB_CONTINUE = 3,       /* Search children and siblings */
  80 };
  81
  82 /* Search child DIEs */
  83 Dwarf_Die *die_find_child(Dwarf_Die *rt_die,
  84                          int (*callback)(Dwarf_Die *, void *),
  85                          void *data, Dwarf_Die *die_mem);
  86
  87 /* Search a non-inlined function including given address */
  88 Dwarf_Die *die_find_realfunc(Dwarf_Die *cu_die, Dwarf_Addr addr,
  89                              Dwarf_Die *die_mem);
  90
  91 /* Search a non-inlined function with tail call at given address */
  92 Dwarf_Die *die_find_tailfunc(Dwarf_Die *cu_die, Dwarf_Addr addr,
  93                                     Dwarf_Die *die_mem);
  94
  95 /* Search the top inlined function including given address */
  96 Dwarf_Die *die_find_top_inlinefunc(Dwarf_Die *sp_die, Dwarf_Addr addr,
  97                                    Dwarf_Die *die_mem);
  98
  99 /* Search the deepest inlined function including given address */
 100 Dwarf_Die *die_find_inlinefunc(Dwarf_Die *sp_die, Dwarf_Addr addr,
 101                                Dwarf_Die *die_mem);
 102
 103 /* Walk on the instances of given DIE */
 104 int die_walk_instances(Dwarf_Die *in_die,
 105                        int (*callback)(Dwarf_Die *, void *), void *data);
 106
 107 /* Walker on lines (Note: line number will not be sorted) */
 108 typedef int (* line_walk_callback_t) (const char *fname, int lineno,
 109                                       Dwarf_Addr addr, void *data);
 110
 111 /*
 112  * Walk on lines inside given DIE. If the DIE is a subprogram, walk only on
 113  * the lines inside the subprogram, otherwise the DIE must be a CU DIE.
 114  */
 115 int die_walk_lines(Dwarf_Die *rt_die, line_walk_callback_t callback, void *data);
 116
 117 /* Find a variable called 'name' at given address */
 118 Dwarf_Die *die_find_variable_at(Dwarf_Die *sp_die, const char *name,
 119                                 Dwarf_Addr addr, Dwarf_Die *die_mem);
 120
 121 /* Find a member called 'name' */
 122 Dwarf_Die *die_find_member(Dwarf_Die *st_die, const char *name,
 123                            Dwarf_Die *die_mem);
 124
 125 /* Get the name of given variable DIE */
 126 int die_get_typename(Dwarf_Die *vr_die, struct strbuf *buf);
 127
 128 /* Get the name and type of given variable DIE, stored as "type\tname" */
 129 int die_get_varname(Dwarf_Die *vr_die, struct strbuf *buf);
 130 int die_get_var_range(Dwarf_Die *sp_die, Dwarf_Die *vr_die, struct strbuf *buf);
 131
 132 /* Check if target program is compiled with optimization */
 133 bool die_is_optimized_target(Dwarf_Die *cu_die);
 134
 135 /* Use next address after prologue as probe location */
 136 void die_skip_prologue(Dwarf_Die *sp_die, Dwarf_Die *cu_die,
 137                        Dwarf_Addr *entrypc);
 138
 139 #endif