gcc/debug.h

   1 /* Debug hooks for GCC.
   2    Copyright (C) 2001, 2002, 2003, 2004, 2005, 2007 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 3, 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; see the file COPYING3.  If not see
  16    <http://www.gnu.org/licenses/>.  */
  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) (const char *main_filename);
  29
  30   /* Output debug symbols.  */
  31   void (* finish) (const char *main_filename);
  32
  33   /* Macro defined on line LINE with name and expansion TEXT.  */
  34   void (* define) (unsigned int line, const char *text);
  35
  36   /* MACRO undefined on line LINE.  */
  37   void (* undef) (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) (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) (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) (unsigned int line, unsigned int n);
  50
  51   /* Record the end of a block.  Arguments as for begin_block.  */
  52   void (* end_block) (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) (tree);
  60
  61   /* Record a source file location at (FILE, LINE).  */
  62   void (* source_line) (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) (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) (unsigned int line, const char *file);
  72
  73   /* Record end of epilogue code.  */
  74   void (* end_epilogue) (unsigned int line, const char *file);
  75
  76   /* Called at start of function DECL, before it is declared.  */
  77   void (* begin_function) (tree decl);
  78
  79   /* Record end of function.  LINE is highest line number in function.  */
  80   void (* end_function) (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) (tree decl);
  87
  88   /* Debug information for a global DECL.  Called from toplev.c after
  89      compilation proper has finished.  */
  90   void (* global_decl) (tree decl);
  91
  92   /* Debug information for a type DECL.  Called from toplev.c after
  93      compilation proper, also from various language front ends to
  94      record built-in types.  The second argument is properly a
  95      boolean, which indicates whether or not the type is a "local"
  96      type as determined by the language.  (It's not a boolean for
  97      legacy reasons.)  */
  98   void (* type_decl) (tree decl, int local);
  99
 100   /* Debug information for imported modules and declarations.  */
 101   void (* imported_module_or_decl) (tree decl, tree context);
 102
 103   /* DECL is an inline function, whose body is present, but which is
 104      not being output at this point.  */
 105   void (* deferred_inline_function) (tree decl);
 106
 107   /* DECL is an inline function which is about to be emitted out of
 108      line.  The hook is useful to, e.g., emit abstract debug info for
 109      the inline before it gets mangled by optimization.  */
 110   void (* outlining_inline_function) (tree decl);
 111
 112   /* Called from final_scan_insn for any CODE_LABEL insn whose
 113      LABEL_NAME is non-null.  */
 114   void (* label) (rtx);
 115
 116   /* Called after the start and before the end of writing a PCH file.
 117      The parameter is 0 if after the start, 1 if before the end.  */
 118   void (* handle_pch) (unsigned int);
 119
 120   /* Called from final_scan_insn for any NOTE_INSN_VAR_LOCATION note.  */
 121   void (* var_location) (rtx);
 122
 123   /* Called from final_scan_insn if there is a switch between hot and cold
 124      text sections.  */
 125   void (* switch_text_section) (void);
 126
 127   /* This is 1 if the debug writer wants to see start and end commands for the
 128      main source files, and 0 otherwise.  */
 129   int start_end_main_source_file;
 130 };
 131
 132 extern const struct gcc_debug_hooks *debug_hooks;
 133
 134 /* The do-nothing hooks.  */
 135 extern void debug_nothing_void (void);
 136 extern void debug_nothing_charstar (const char *);
 137 extern void debug_nothing_int_charstar (unsigned int, const char *);
 138 extern void debug_nothing_int (unsigned int);
 139 extern void debug_nothing_int_int (unsigned int, unsigned int);
 140 extern void debug_nothing_tree (tree);
 141 extern void debug_nothing_tree_int (tree, int);
 142 extern void debug_nothing_tree_tree (tree, tree);
 143 extern bool debug_true_tree (tree);
 144 extern void debug_nothing_rtx (rtx);
 145
 146 /* Hooks for various debug formats.  */
 147 extern const struct gcc_debug_hooks do_nothing_debug_hooks;
 148 extern const struct gcc_debug_hooks dbx_debug_hooks;
 149 extern const struct gcc_debug_hooks sdb_debug_hooks;
 150 extern const struct gcc_debug_hooks xcoff_debug_hooks;
 151 extern const struct gcc_debug_hooks dwarf2_debug_hooks;
 152 extern const struct gcc_debug_hooks vmsdbg_debug_hooks;
 153
 154 /* Dwarf2 frame information.  */
 155
 156 extern void dwarf2out_begin_prologue (unsigned int, const char *);
 157 extern void dwarf2out_end_epilogue (unsigned int, const char *);
 158 extern void dwarf2out_frame_init (void);
 159 extern void dwarf2out_frame_finish (void);
 160 /* Decide whether we want to emit frame unwind information for the current
 161    translation unit.  */
 162 extern int dwarf2out_do_frame (void);
 163
 164 extern void debug_flush_symbol_queue (void);
 165 extern void debug_queue_symbol (tree);
 166 extern void debug_free_queue (void);
 167 extern int debug_nesting;
 168 extern int symbol_queue_index;
 169
 170 #endif /* !GCC_DEBUG_H  */