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 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 /* Ensure that this DIE is a subprogram and definition (not declaration) */
  42 extern bool die_is_func_def(Dwarf_Die *dw_die);
  43
  44 /* Compare diename and tname */
  45 extern bool die_compare_name(Dwarf_Die *dw_die, const char *tname);
  46
  47 /* Get callsite line number of inline-function instance */
  48 extern int die_get_call_lineno(Dwarf_Die *in_die);
  49
  50 /* Get callsite file name of inlined function instance */
  51 extern const char *die_get_call_file(Dwarf_Die *in_die);
  52
  53 /* Get type die */
  54 extern Dwarf_Die *die_get_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem);
  55
  56 /* Get a type die, but skip qualifiers and typedef */
  57 extern Dwarf_Die *die_get_real_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem);
  58
  59 /* Check whether the DIE is signed or not */
  60 extern bool die_is_signed_type(Dwarf_Die *tp_die);
  61
  62 /* Get data_member_location offset */
  63 extern int die_get_data_member_location(Dwarf_Die *mb_die, Dwarf_Word *offs);
  64
  65 /* Return values for die_find_child() callbacks */
  66 enum {
  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 */
  74 extern Dwarf_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 */
  79 extern Dwarf_Die *die_find_realfunc(Dwarf_Die *cu_die, Dwarf_Addr addr,
  80                                     Dwarf_Die *die_mem);
  81
  82 /* Search the top inlined function including given address */
  83 extern Dwarf_Die *die_find_top_inlinefunc(Dwarf_Die *sp_die, Dwarf_Addr addr,
  84                                           Dwarf_Die *die_mem);
  85
  86 /* Search the deepest inlined function including given address */
  87 extern Dwarf_Die *die_find_inlinefunc(Dwarf_Die *sp_die, Dwarf_Addr addr,
  88                                       Dwarf_Die *die_mem);
  89
  90 /* Walk on the instances of given DIE */
  91 extern int die_walk_instances(Dwarf_Die *in_die,
  92                               int (*callback)(Dwarf_Die *, void *), void *data);
  93
  94 /* Walker on lines (Note: line number will not be sorted) */
  95 typedef int (* line_walk_callback_t) (const char *fname, int lineno,
  96                                       Dwarf_Addr addr, void *data);
  97
  98 /*
  99  * Walk on lines inside given DIE. If the DIE is a subprogram, walk only on
 100  * the lines inside the subprogram, otherwise the DIE must be a CU DIE.
 101  */
 102 extern int die_walk_lines(Dwarf_Die *rt_die, line_walk_callback_t callback,
 103                           void *data);
 104
 105 /* Find a variable called 'name' at given address */
 106 extern Dwarf_Die *die_find_variable_at(Dwarf_Die *sp_die, const char *name,
 107                                        Dwarf_Addr addr, Dwarf_Die *die_mem);
 108
 109 /* Find a member called 'name' */
 110 extern Dwarf_Die *die_find_member(Dwarf_Die *st_die, const char *name,
 111                                   Dwarf_Die *die_mem);
 112
 113 /* Get the name of given variable DIE */
 114 extern int die_get_typename(Dwarf_Die *vr_die, char *buf, int len);
 115
 116 /* Get the name and type of given variable DIE, stored as "type\tname" */
 117 extern int die_get_varname(Dwarf_Die *vr_die, char *buf, int len);
 118 #endif