gcc/debug.h

   1 /* Debug hooks for GCC.
   2    Copyright (C) 2001, 2002, 2003, 2004, 2005, 2007, 2008
   3    Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify it
   6    under the terms of the GNU General Public License as published by the
   7    Free Software Foundation; either version 3, or (at your option) any
   8    later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; see the file COPYING3.  If not see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef GCC_DEBUG_H
  20 #define GCC_DEBUG_H
  21
  22 /* This structure contains hooks for the debug information output
  23    functions, accessed through the global instance debug_hooks set in
  24    toplev.c according to command line options.  */
  25 struct gcc_debug_hooks
  26 {
  27   /* Initialize debug output.  MAIN_FILENAME is the name of the main
  28      input file.  */
  29   void (* init) (const char *main_filename);
  30
  31   /* Output debug symbols.  */
  32   void (* finish) (const char *main_filename);
  33
  34   /* Called from cgraph_optimize before starting to assemble
  35      functions/variables/toplevel asms.  */
  36   void (* assembly_start) (void);
  37
  38   /* Macro defined on line LINE with name and expansion TEXT.  */
  39   void (* define) (unsigned int line, const char *text);
  40
  41   /* MACRO undefined on line LINE.  */
  42   void (* undef) (unsigned int line, const char *macro);
  43
  44   /* Record the beginning of a new source file FILE from LINE number
  45      in the previous one.  */
  46   void (* start_source_file) (unsigned int line, const char *file);
  47
  48   /* Record the resumption of a source file.  LINE is the line number
  49      in the source file we are returning to.  */
  50   void (* end_source_file) (unsigned int line);
  51
  52   /* Record the beginning of block N, counting from 1 and not
  53      including the function-scope block, at LINE.  */
  54   void (* begin_block) (unsigned int line, unsigned int n);
  55
  56   /* Record the end of a block.  Arguments as for begin_block.  */
  57   void (* end_block) (unsigned int line, unsigned int n);
  58
  59   /* Returns nonzero if it is appropriate not to emit any debugging
  60      information for BLOCK, because it doesn't contain any
  61      instructions.  This may not be the case for blocks containing
  62      nested functions, since we may actually call such a function even
  63      though the BLOCK information is messed up.  Defaults to true.  */
  64   bool (* ignore_block) (const_tree);
  65
  66   /* Record a source file location at (FILE, LINE, DISCRIMINATOR).  */
  67   void (* source_line) (unsigned int line, const char *file,
  68                         int discriminator, bool is_stmt);
  69
  70   /* Called at start of prologue code.  LINE is the first line in the
  71      function.  */
  72   void (* begin_prologue) (unsigned int line, const char *file);
  73
  74   /* Called at end of prologue code.  LINE is the first line in the
  75      function.  */
  76   void (* end_prologue) (unsigned int line, const char *file);
  77
  78   /* Record end of epilogue code.  */
  79   void (* end_epilogue) (unsigned int line, const char *file);
  80
  81   /* Called at start of function DECL, before it is declared.  */
  82   void (* begin_function) (tree decl);
  83
  84   /* Record end of function.  LINE is highest line number in function.  */
  85   void (* end_function) (unsigned int line);
  86
  87   /* Debug information for a function DECL.  This might include the
  88      function name (a symbol), its parameters, and the block that
  89      makes up the function's body, and the local variables of the
  90      function.  */
  91   void (* function_decl) (tree decl);
  92
  93   /* Debug information for a global DECL.  Called from toplev.c after
  94      compilation proper has finished.  */
  95   void (* global_decl) (tree decl);
  96
  97   /* Debug information for a type DECL.  Called from toplev.c after
  98      compilation proper, also from various language front ends to
  99      record built-in types.  The second argument is properly a
 100      boolean, which indicates whether or not the type is a "local"
 101      type as determined by the language.  (It's not a boolean for
 102      legacy reasons.)  */
 103   void (* type_decl) (tree decl, int local);
 104
 105   /* Debug information for imported modules and declarations.  */
 106   void (* imported_module_or_decl) (tree decl, tree name,
 107                                     tree context, bool child);
 108
 109   /* DECL is an inline function, whose body is present, but which is
 110      not being output at this point.  */
 111   void (* deferred_inline_function) (tree decl);
 112
 113   /* DECL is an inline function which is about to be emitted out of
 114      line.  The hook is useful to, e.g., emit abstract debug info for
 115      the inline before it gets mangled by optimization.  */
 116   void (* outlining_inline_function) (tree decl);
 117
 118   /* Called from final_scan_insn for any CODE_LABEL insn whose
 119      LABEL_NAME is non-null.  */
 120   void (* label) (rtx);
 121
 122   /* Called after the start and before the end of writing a PCH file.
 123      The parameter is 0 if after the start, 1 if before the end.  */
 124   void (* handle_pch) (unsigned int);
 125
 126   /* Called from final_scan_insn for any NOTE_INSN_VAR_LOCATION note.  */
 127   void (* var_location) (rtx);
 128
 129   /* Called from final_scan_insn if there is a switch between hot and cold
 130      text sections.  */
 131   void (* switch_text_section) (void);
 132
 133   /* Records a direct call to the function DECL, noting the point of call
 134      and the debug info for the function.  Called from final_scan_insn
 135      when ICF debugging is enabled.  */
 136   void (* direct_call) (tree decl);
 137
 138   /* Records the OBJ_TYPE_REF_TOKEN for a virtual call through ADDR, which
 139      for C++ is the vtable slot index, noting the INSN_UID for the call
 140      instruction.  Called from calls.c:emit_call_1 when ICF debugging is
 141      enabled.  It's necessary to do this during lowering because the
 142      call instruction and the OBJ_TYPE_REF become separated after that
 143      point.  */
 144   void (* virtual_call_token) (tree addr, int insn_uid);
 145
 146   /* Copies the OBJ_TYPE_REF_TOKEN for a virtual call from OLD_INSN to
 147      NEW_INSN.  Called from emit-rtl.c:try_split when a CALL_INSN is
 148      split, so that the vtable slot index remains associated with the
 149      new CALL_INSN.  */
 150   void (* copy_call_info) (rtx old_insn, rtx new_insn);
 151
 152   /* Records a virtual call given INSN_UID, which is the UID of the call
 153      instruction.  The UID is then mapped to the vtable slot index noted
 154      during the lowering phase.  Called from final_scan_insn when ICF
 155      debugging is enabled.  */
 156   void (* virtual_call) (int insn_uid);
 157
 158   /* Called from grokdeclarator.  Replaces the anonymous name with the
 159      type name.  */
 160   void (* set_name) (tree, tree);
 161
 162   /* This is 1 if the debug writer wants to see start and end commands for the
 163      main source files, and 0 otherwise.  */
 164   int start_end_main_source_file;
 165 };
 166
 167 extern const struct gcc_debug_hooks *debug_hooks;
 168
 169 /* The do-nothing hooks.  */
 170 extern void debug_nothing_void (void);
 171 extern void debug_nothing_charstar (const char *);
 172 extern void debug_nothing_int_charstar (unsigned int, const char *);
 173 extern void debug_nothing_int_charstar_int_bool (unsigned int, const char *,
 174                                                  int, bool);
 175 extern void debug_nothing_int (unsigned int);
 176 extern void debug_nothing_int_int (unsigned int, unsigned int);
 177 extern void debug_nothing_tree (tree);
 178 extern void debug_nothing_tree_tree (tree, tree);
 179 extern void debug_nothing_tree_int (tree, int);
 180 extern void debug_nothing_tree_tree_tree_bool (tree, tree, tree, bool);
 181 extern bool debug_true_const_tree (const_tree);
 182 extern void debug_nothing_rtx (rtx);
 183 extern void debug_nothing_rtx_rtx (rtx, rtx);
 184 extern void debug_nothing_uid (int);
 185
 186 /* Hooks for various debug formats.  */
 187 extern const struct gcc_debug_hooks do_nothing_debug_hooks;
 188 extern const struct gcc_debug_hooks dbx_debug_hooks;
 189 extern const struct gcc_debug_hooks sdb_debug_hooks;
 190 extern const struct gcc_debug_hooks xcoff_debug_hooks;
 191 extern const struct gcc_debug_hooks dwarf2_debug_hooks;
 192 extern const struct gcc_debug_hooks vmsdbg_debug_hooks;
 193
 194 /* Dwarf2 frame information.  */
 195
 196 extern void dwarf2out_begin_prologue (unsigned int, const char *);
 197 extern void dwarf2out_end_epilogue (unsigned int, const char *);
 198 extern void dwarf2out_frame_init (void);
 199 extern void dwarf2out_frame_finish (void);
 200 /* Decide whether we want to emit frame unwind information for the current
 201    translation unit.  */
 202 extern int dwarf2out_do_frame (void);
 203 extern int dwarf2out_do_cfi_asm (void);
 204 extern void dwarf2out_switch_text_section (void);
 205
 206 extern void debug_flush_symbol_queue (void);
 207 extern void debug_queue_symbol (tree);
 208 extern void debug_free_queue (void);
 209 extern int debug_nesting;
 210 extern int symbol_queue_index;
 211
 212 const char *remap_debug_filename (const char *);
 213 void add_debug_prefix_map (const char *);
 214
 215 #endif /* !GCC_DEBUG_H  */