gcc/debug.h

   1 /* Debug hooks for GCC.
   2    Copyright (C) 2001, 2002 Free Software Foundation, Inc.
   3
   4 This program is free software; you can redistribute it and/or modify it
   5 under the terms of the GNU General Public License as published by the
   6 Free Software Foundation; either version 2, or (at your option) any
   7 later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17
  18 #ifndef GCC_DEBUG_H
  19 #define GCC_DEBUG_H
  20
  21 /* This structure contains hooks for the debug information output
  22    functions, accessed through the global instance debug_hooks set in
  23    toplev.c according to command line options.  */
  24 struct gcc_debug_hooks
  25 {
  26   /* Initialize debug output.  MAIN_FILENAME is the name of the main
  27      input file.  */
  28   void (* init) PARAMS ((const char *main_filename));
  29
  30   /* Output debug symbols.  */
  31   void (* finish) PARAMS ((const char *main_filename));
  32
  33   /* Macro defined on line LINE with name and expansion TEXT.  */
  34   void (* define) PARAMS ((unsigned int line, const char *text));
  35
  36   /* MACRO undefined on line LINE.  */
  37   void (* undef) PARAMS ((unsigned int line, const char *macro));
  38
  39   /* Record the beginning of a new source file FILE from LINE number
  40      in the previous one.  */
  41   void (* start_source_file) PARAMS ((unsigned int line, const char *file));
  42
  43   /* Record the resumption of a source file.  LINE is the line number
  44      in the source file we are returning to.  */
  45   void (* end_source_file) PARAMS ((unsigned int line));
  46
  47   /* Record the beginning of block N, counting from 1 and not
  48      including the function-scope block, at LINE.  */
  49   void (* begin_block) PARAMS ((unsigned int line, unsigned int n));
  50
  51   /* Record the end of a block.  Arguments as for begin_block.  */
  52   void (* end_block) PARAMS ((unsigned int line, unsigned int n));
  53
  54   /* Returns nonzero if it is appropriate not to emit any debugging
  55      information for BLOCK, because it doesn't contain any
  56      instructions.  This may not be the case for blocks containing
  57      nested functions, since we may actually call such a function even
  58      though the BLOCK information is messed up.  Defaults to true.  */
  59   bool (* ignore_block) PARAMS ((tree));
  60
  61   /* Record a source file location at (FILE, LINE).  */
  62   void (* source_line) PARAMS ((unsigned int line, const char *file));
  63
  64   /* Called at start of prologue code.  LINE is the first line in the
  65      function.  This has been given the same prototype as source_line,
  66      so that the source_line hook can be substituted if appropriate.  */
  67   void (* begin_prologue) PARAMS ((unsigned int line, const char *file));
  68
  69   /* Called at end of prologue code.  LINE is the first line in the
  70      function.  */
  71   void (* end_prologue) PARAMS ((unsigned int line, const char *file));
  72
  73   /* Record end of epilogue code.  */
  74   void (* end_epilogue) PARAMS ((unsigned int line, const char *file));
  75
  76   /* Called at start of function DECL, before it is declared.  */
  77   void (* begin_function) PARAMS ((tree decl));
  78
  79   /* Record end of function.  LINE is highest line number in function.  */
  80   void (* end_function) PARAMS ((unsigned int line));
  81
  82   /* Debug information for a function DECL.  This might include the
  83      function name (a symbol), its parameters, and the block that
  84      makes up the function's body, and the local variables of the
  85      function.  */
  86   void (* function_decl) PARAMS ((tree decl));
  87
  88   /* Debug information for a global DECL.  Called from toplev.c after
  89      compilation proper has finished.  */
  90   void (* global_decl) PARAMS ((tree decl));
  91
  92   /* DECL is an inline function, whose body is present, but which is
  93      not being output at this point.  */
  94   void (* deferred_inline_function) PARAMS ((tree decl));
  95
  96   /* DECL is an inline function which is about to be emitted out of
  97      line.  The hook is useful to, e.g., emit abstract debug info for
  98      the inline before it gets mangled by optimization.  */
  99   void (* outlining_inline_function) PARAMS ((tree decl));
 100
 101   /* Called from final_scan_insn for any CODE_LABEL insn whose
 102      LABEL_NAME is non-null.  */
 103   void (* label) PARAMS ((rtx));
 104 };
 105
 106 extern const struct gcc_debug_hooks *debug_hooks;
 107
 108 /* The do-nothing hooks.  */
 109 extern void debug_nothing_void
 110   PARAMS ((void));
 111 extern void debug_nothing_charstar
 112   PARAMS ((const char *));
 113 extern void debug_nothing_int_charstar
 114   PARAMS ((unsigned int, const char *));
 115 extern void debug_nothing_int
 116   PARAMS ((unsigned int));
 117 extern void debug_nothing_int_int
 118   PARAMS ((unsigned int, unsigned int));
 119 extern void debug_nothing_tree
 120   PARAMS ((tree));
 121 extern bool debug_true_tree
 122   PARAMS ((tree));
 123 extern void debug_nothing_rtx
 124   PARAMS ((rtx));
 125
 126 /* Hooks for various debug formats.  */
 127 extern const struct gcc_debug_hooks do_nothing_debug_hooks;
 128 extern const struct gcc_debug_hooks dbx_debug_hooks;
 129 extern const struct gcc_debug_hooks sdb_debug_hooks;
 130 extern const struct gcc_debug_hooks xcoff_debug_hooks;
 131 extern const struct gcc_debug_hooks dwarf_debug_hooks;
 132 extern const struct gcc_debug_hooks dwarf2_debug_hooks;
 133 extern const struct gcc_debug_hooks vmsdbg_debug_hooks;
 134
 135 /* Dwarf2 frame information.  */
 136
 137 extern void dwarf2out_begin_prologue    PARAMS ((unsigned int, const char *));
 138 extern void dwarf2out_end_epilogue      PARAMS ((unsigned int, const char *));
 139 extern void dwarf2out_frame_init        PARAMS ((void));
 140 extern void dwarf2out_frame_finish      PARAMS ((void));
 141 /* Decide whether we want to emit frame unwind information for the current
 142    translation unit.  */
 143 extern int dwarf2out_do_frame           PARAMS ((void));
 144
 145 #endif /* !GCC_DEBUG_H  */