1 /* Debug hooks for GCC.
2 Copyright (C) 2001-2015 Free Software Foundation, Inc.
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
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.
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/>. */
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
26 /* Initialize debug output. MAIN_FILENAME is the name of the main
28 void (* init) (const char *main_filename);
30 /* Output debug symbols. */
31 void (* finish) (const char *main_filename);
33 /* Called from cgraph_optimize before starting to assemble
34 functions/variables/toplevel asms. */
35 void (* assembly_start) (void);
37 /* Macro defined on line LINE with name and expansion TEXT. */
38 void (* define) (unsigned int line, const char *text);
40 /* MACRO undefined on line LINE. */
41 void (* undef) (unsigned int line, const char *macro);
43 /* Record the beginning of a new source file FILE from LINE number
44 in the previous one. */
45 void (* start_source_file) (unsigned int line, const char *file);
47 /* Record the resumption of a source file. LINE is the line number
48 in the source file we are returning to. */
49 void (* end_source_file) (unsigned int line);
51 /* Record the beginning of block N, counting from 1 and not
52 including the function-scope block, at LINE. */
53 void (* begin_block) (unsigned int line, unsigned int n);
55 /* Record the end of a block. Arguments as for begin_block. */
56 void (* end_block) (unsigned int line, unsigned int n);
58 /* Returns nonzero if it is appropriate not to emit any debugging
59 information for BLOCK, because it doesn't contain any
60 instructions. This may not be the case for blocks containing
61 nested functions, since we may actually call such a function even
62 though the BLOCK information is messed up. Defaults to true. */
63 bool (* ignore_block) (const_tree);
65 /* Record a source file location at (FILE, LINE, DISCRIMINATOR). */
66 void (* source_line) (unsigned int line, const char *file,
67 int discriminator, bool is_stmt);
69 /* Called at start of prologue code. LINE is the first line in the
71 void (* begin_prologue) (unsigned int line, const char *file);
73 /* Called at end of prologue code. LINE is the first line in the
75 void (* end_prologue) (unsigned int line, const char *file);
77 /* Called at beginning of epilogue code. */
78 void (* begin_epilogue) (unsigned int line, const char *file);
80 /* Record end of epilogue code. */
81 void (* end_epilogue) (unsigned int line, const char *file);
83 /* Called at start of function DECL, before it is declared. */
84 void (* begin_function) (tree decl);
86 /* Record end of function. LINE is highest line number in function. */
87 void (* end_function) (unsigned int line);
89 /* Register UNIT as the main translation unit. Called from front-ends when
90 they create their main translation unit. */
91 void (* register_main_translation_unit) (tree);
93 /* Debug information for a function DECL. This might include the
94 function name (a symbol), its parameters, and the block that
95 makes up the function's body, and the local variables of the
97 void (* function_decl) (tree decl);
99 /* Debug information for a global DECL. Called from toplev.c after
100 compilation proper has finished. */
101 void (* global_decl) (tree decl);
103 /* Debug information for a type DECL. Called from toplev.c after
104 compilation proper, also from various language front ends to
105 record built-in types. The second argument is properly a
106 boolean, which indicates whether or not the type is a "local"
107 type as determined by the language. (It's not a boolean for
109 void (* type_decl) (tree decl, int local);
111 /* Debug information for imported modules and declarations. */
112 void (* imported_module_or_decl) (tree decl, tree name,
113 tree context, bool child);
115 /* DECL is an inline function, whose body is present, but which is
116 not being output at this point. */
117 void (* deferred_inline_function) (tree decl);
119 /* DECL is an inline function which is about to be emitted out of
120 line. The hook is useful to, e.g., emit abstract debug info for
121 the inline before it gets mangled by optimization. */
122 void (* outlining_inline_function) (tree decl);
124 /* Called from final_scan_insn for any CODE_LABEL insn whose
125 LABEL_NAME is non-null. */
126 void (* label) (rtx_code_label *);
128 /* Called after the start and before the end of writing a PCH file.
129 The parameter is 0 if after the start, 1 if before the end. */
130 void (* handle_pch) (unsigned int);
132 /* Called from final_scan_insn for any NOTE_INSN_VAR_LOCATION note. */
133 void (* var_location) (rtx_insn *);
135 /* Called from final_scan_insn if there is a switch between hot and cold
137 void (* switch_text_section) (void);
139 /* Called from grokdeclarator. Replaces the anonymous name with the
141 void (* set_name) (tree, tree);
143 /* This is 1 if the debug writer wants to see start and end commands for the
144 main source files, and 0 otherwise. */
145 int start_end_main_source_file;
147 /* The type of symtab field used by these debug hooks. This is one
148 of the TYPE_SYMTAB_IS_xxx values defined in tree.h. */
149 int tree_type_symtab_field;
152 extern const struct gcc_debug_hooks *debug_hooks;
154 /* The do-nothing hooks. */
155 extern void debug_nothing_void (void);
156 extern void debug_nothing_charstar (const char *);
157 extern void debug_nothing_int_charstar (unsigned int, const char *);
158 extern void debug_nothing_int_charstar_int_bool (unsigned int, const char *,
160 extern void debug_nothing_int (unsigned int);
161 extern void debug_nothing_int_int (unsigned int, unsigned int);
162 extern void debug_nothing_tree (tree);
163 extern void debug_nothing_tree_tree (tree, tree);
164 extern void debug_nothing_tree_int (tree, int);
165 extern void debug_nothing_tree_tree_tree_bool (tree, tree, tree, bool);
166 extern bool debug_true_const_tree (const_tree);
167 extern void debug_nothing_rtx_insn (rtx_insn *);
168 extern void debug_nothing_rtx_code_label (rtx_code_label *);
170 /* Hooks for various debug formats. */
171 extern const struct gcc_debug_hooks do_nothing_debug_hooks;
172 extern const struct gcc_debug_hooks dbx_debug_hooks;
173 extern const struct gcc_debug_hooks sdb_debug_hooks;
174 extern const struct gcc_debug_hooks xcoff_debug_hooks;
175 extern const struct gcc_debug_hooks dwarf2_debug_hooks;
176 extern const struct gcc_debug_hooks vmsdbg_debug_hooks;
178 /* Dwarf2 frame information. */
180 extern void dwarf2out_begin_prologue (unsigned int, const char *);
181 extern void dwarf2out_vms_end_prologue (unsigned int, const char *);
182 extern void dwarf2out_vms_begin_epilogue (unsigned int, const char *);
183 extern void dwarf2out_end_epilogue (unsigned int, const char *);
184 extern void dwarf2out_frame_finish (void);
185 /* Decide whether we want to emit frame unwind information for the current
187 extern bool dwarf2out_do_frame (void);
188 extern bool dwarf2out_do_cfi_asm (void);
189 extern void dwarf2out_switch_text_section (void);
191 const char *remap_debug_filename (const char *);
192 void add_debug_prefix_map (const char *);
194 /* For -fdump-go-spec. */
196 extern const struct gcc_debug_hooks *
197 dump_go_spec_init (const char *, const struct gcc_debug_hooks *);
199 #endif /* !GCC_DEBUG_H */