275 lines
11 KiB
C
275 lines
11 KiB
C
/* Debug hooks for GCC.
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Copyright (C) 2001-2019 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 3, or (at your option) any
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later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_DEBUG_H
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#define GCC_DEBUG_H
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/* This structure contains hooks for the debug information output
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functions, accessed through the global instance debug_hooks set in
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toplev.c according to command line options. */
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struct gcc_debug_hooks
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{
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/* Initialize debug output. MAIN_FILENAME is the name of the main
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input file. */
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void (* init) (const char *main_filename);
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/* Output debug symbols. */
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void (* finish) (const char *main_filename);
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/* Run cleanups necessary after early debug generation. */
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void (* early_finish) (const char *main_filename);
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/* Called from cgraph_optimize before starting to assemble
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functions/variables/toplevel asms. */
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void (* assembly_start) (void);
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/* Macro defined on line LINE with name and expansion TEXT. */
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void (* define) (unsigned int line, const char *text);
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/* MACRO undefined on line LINE. */
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void (* undef) (unsigned int line, const char *macro);
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/* Record the beginning of a new source file FILE from LINE number
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in the previous one. */
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void (* start_source_file) (unsigned int line, const char *file);
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/* Record the resumption of a source file. LINE is the line number
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in the source file we are returning to. */
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void (* end_source_file) (unsigned int line);
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/* Record the beginning of block N, counting from 1 and not
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including the function-scope block, at LINE. */
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void (* begin_block) (unsigned int line, unsigned int n);
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/* Record the end of a block. Arguments as for begin_block. */
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void (* end_block) (unsigned int line, unsigned int n);
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/* Returns nonzero if it is appropriate not to emit any debugging
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information for BLOCK, because it doesn't contain any
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instructions. This may not be the case for blocks containing
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nested functions, since we may actually call such a function even
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though the BLOCK information is messed up. Defaults to true. */
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bool (* ignore_block) (const_tree);
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/* Record a source file location at (FILE, LINE, COLUMN, DISCRIMINATOR). */
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void (* source_line) (unsigned int line, unsigned int column,
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const char *file, int discriminator, bool is_stmt);
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/* Called at start of prologue code. LINE is the first line in the
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function. */
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void (* begin_prologue) (unsigned int line, unsigned int column,
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const char *file);
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/* Called at end of prologue code. LINE is the first line in the
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function. */
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void (* end_prologue) (unsigned int line, const char *file);
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/* Called at beginning of epilogue code. */
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void (* begin_epilogue) (unsigned int line, const char *file);
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/* Record end of epilogue code. */
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void (* end_epilogue) (unsigned int line, const char *file);
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/* Called at start of function DECL, before it is declared. */
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void (* begin_function) (tree decl);
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/* Record end of function. LINE is highest line number in function. */
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void (* end_function) (unsigned int line);
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/* Register UNIT as the main translation unit. Called from front-ends when
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they create their main translation unit. */
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void (* register_main_translation_unit) (tree);
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/* Debug information for a function DECL. This might include the
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function name (a symbol), its parameters, and the block that
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makes up the function's body, and the local variables of the
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function.
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This is only called for FUNCTION_DECLs. It is part of the late
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debug pass and is called from rest_of_handle_final.
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Location information is available at this point.
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See the documentation for early_global_decl and late_global_decl
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for other entry points into the debugging back-ends for DECLs. */
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void (* function_decl) (tree decl);
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/* Debug information for a global DECL. Called from the parser
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after the parsing process has finished.
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This gets called for both variables and functions.
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Location information is not available at this point, but it is a
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good probe point to get access to symbols before they get
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optimized away.
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This hook may be called on VAR_DECLs or FUNCTION_DECLs. It is up
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to the hook to use what it needs. */
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void (* early_global_decl) (tree decl);
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/* Augment debug information generated by early_global_decl with
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more complete debug info (if applicable). Called from toplev.c
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after the compilation proper has finished and cgraph information
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is available.
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This gets called for both variables and functions.
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Location information is usually available at this point, unless
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the hook is being called for a decl that has been optimized away.
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This hook may be called on VAR_DECLs or FUNCTION_DECLs. It is up
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to the hook to use what it needs. */
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void (* late_global_decl) (tree decl);
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/* Debug information for a type DECL. Called from toplev.c after
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compilation proper, also from various language front ends to
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record built-in types. The second argument is properly a
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boolean, which indicates whether or not the type is a "local"
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type as determined by the language. (It's not a boolean for
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legacy reasons.) */
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void (* type_decl) (tree decl, int local);
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/* Debug information for imported modules and declarations. */
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void (* imported_module_or_decl) (tree decl, tree name,
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tree context, bool child,
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bool implicit);
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/* Return true if a DIE for the tree is available and return a symbol
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and offset that can be used to refer to it externally. */
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bool (* die_ref_for_decl) (tree, const char **, unsigned HOST_WIDE_INT *);
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/* Early debug information for the tree is available at symbol plus
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offset externally. */
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void (* register_external_die) (tree, const char *, unsigned HOST_WIDE_INT);
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/* DECL is an inline function, whose body is present, but which is
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not being output at this point. */
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void (* deferred_inline_function) (tree decl);
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/* DECL is an inline function which is about to be emitted out of
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line. The hook is useful to, e.g., emit abstract debug info for
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the inline before it gets mangled by optimization. */
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void (* outlining_inline_function) (tree decl);
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/* Called from final_scan_insn for any CODE_LABEL insn whose
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LABEL_NAME is non-null. */
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void (* label) (rtx_code_label *);
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/* Called after the start and before the end of writing a PCH file.
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The parameter is 0 if after the start, 1 if before the end. */
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void (* handle_pch) (unsigned int);
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/* Called from final_scan_insn for any NOTE_INSN_VAR_LOCATION note. */
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void (* var_location) (rtx_insn *);
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/* Called from final_scan_insn for any NOTE_INSN_INLINE_ENTRY note. */
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void (* inline_entry) (tree block);
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/* Called from finalize_size_functions for size functions so that their body
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can be encoded in the debug info to describe the layout of variable-length
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structures. */
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void (* size_function) (tree decl);
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/* Called from final_scan_insn if there is a switch between hot and cold
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text sections. */
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void (* switch_text_section) (void);
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/* Called from grokdeclarator. Replaces the anonymous name with the
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type name. */
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void (* set_name) (tree, tree);
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/* This is 1 if the debug writer wants to see start and end commands for the
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main source files, and 0 otherwise. */
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int start_end_main_source_file;
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/* The type of symtab field used by these debug hooks. This is one
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of the TYPE_SYMTAB_IS_xxx values defined in tree.h. */
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int tree_type_symtab_field;
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};
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extern const struct gcc_debug_hooks *debug_hooks;
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/* The do-nothing hooks. */
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extern void debug_nothing_void (void);
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extern void debug_nothing_charstar (const char *);
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extern void debug_nothing_int_int_charstar (unsigned int, unsigned int,
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const char *);
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extern void debug_nothing_int_charstar (unsigned int, const char *);
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extern void debug_nothing_int_int_charstar_int_bool (unsigned int,
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unsigned int,
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const char *,
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int, bool);
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extern void debug_nothing_int (unsigned int);
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extern void debug_nothing_int_int (unsigned int, unsigned int);
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extern void debug_nothing_tree (tree);
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extern void debug_nothing_tree_tree (tree, tree);
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extern void debug_nothing_tree_int (tree, int);
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extern void debug_nothing_tree_tree_tree_bool_bool (tree, tree, tree,
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bool, bool);
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extern bool debug_true_const_tree (const_tree);
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extern void debug_nothing_rtx_insn (rtx_insn *);
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extern void debug_nothing_rtx_code_label (rtx_code_label *);
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extern bool debug_false_tree_charstarstar_uhwistar (tree, const char **,
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unsigned HOST_WIDE_INT *);
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extern void debug_nothing_tree_charstar_uhwi (tree, const char *,
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unsigned HOST_WIDE_INT);
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/* Hooks for various debug formats. */
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extern const struct gcc_debug_hooks do_nothing_debug_hooks;
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extern const struct gcc_debug_hooks dbx_debug_hooks;
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extern const struct gcc_debug_hooks xcoff_debug_hooks;
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extern const struct gcc_debug_hooks dwarf2_debug_hooks;
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extern const struct gcc_debug_hooks dwarf2_lineno_debug_hooks;
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extern const struct gcc_debug_hooks vmsdbg_debug_hooks;
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/* Dwarf2 frame information. */
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extern void dwarf2out_begin_prologue (unsigned int, unsigned int,
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const char *);
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extern void dwarf2out_vms_end_prologue (unsigned int, const char *);
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extern void dwarf2out_vms_begin_epilogue (unsigned int, const char *);
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extern void dwarf2out_end_epilogue (unsigned int, const char *);
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extern void dwarf2out_frame_finish (void);
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extern bool dwarf2out_do_eh_frame (void);
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extern bool dwarf2out_do_frame (void);
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extern bool dwarf2out_do_cfi_asm (void);
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extern void dwarf2out_switch_text_section (void);
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extern bool dwarf2out_default_as_loc_support (void);
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extern bool dwarf2out_default_as_locview_support (void);
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/* For -fdump-go-spec. */
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extern const struct gcc_debug_hooks *
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dump_go_spec_init (const char *, const struct gcc_debug_hooks *);
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/* Instance discriminator mapping table. See final.c. */
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typedef hash_map<const_tree, int> decl_to_instance_map_t;
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extern decl_to_instance_map_t *decl_to_instance_map;
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/* Allocate decl_to_instance_map with COUNT slots to begin wtih, if it
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* hasn't been allocated yet. */
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static inline decl_to_instance_map_t *
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maybe_create_decl_to_instance_map (int count = 13)
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{
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if (!decl_to_instance_map)
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decl_to_instance_map = new decl_to_instance_map_t (count);
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return decl_to_instance_map;
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}
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#endif /* !GCC_DEBUG_H */
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