X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fexcept.h;h=58461483cafdbe2fdc84979e5e47be30fb3541ff;hb=4c77974444cb8aad3524031282d4190346a6d0b5;hp=56be5203fdef950062da2c351f85a1e2be5aee79;hpb=97ecdf3e2387c1db248d871bd8b400d3e319086f;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/except.h b/gcc/except.h index 56be5203fde..58461483caf 100644 --- a/gcc/except.h +++ b/gcc/except.h @@ -1,98 +1,161 @@ /* Exception Handling interface routines. - Copyright (C) 1996 Free Software Foundation, Inc. + Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 + Free Software Foundation, Inc. Contributed by Mike Stump . -This file is part of GNU CC. +This file is part of GCC. -GNU CC is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. +GCC is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free +Software Foundation; either version 2, or (at your option) any later +version. -GNU CC is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. +GCC is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY; without even the implied warranty of MERCHANTABILITY or +FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +for more details. You should have received a copy of the GNU General Public License -along with GNU CC; see the file COPYING. If not, write to -the Free Software Foundation, 59 Temple Place - Suite 330, -Boston, MA 02111-1307, USA. */ +along with GCC; see the file COPYING. If not, write to the Free +Software Foundation, 59 Temple Place - Suite 330, Boston, MA +02111-1307, USA. */ -#ifndef GET_CODE -#define rtx int * -#endif - -#ifdef TREE_CODE - -struct label_node { - union { - rtx rlabel; - tree tlabel; - } u; - struct label_node *chain; -}; - -/* A entry for the exception handling stack EHSTACK or the exception - handling queue EHQUEUE. */ -struct eh_entry { - rtx start_label; - rtx end_label; - rtx exception_handler_label; - - tree finalization; -}; - -struct eh_node { - struct eh_entry *entry; - struct eh_node *chain; -}; - -struct eh_stack { - struct eh_node *top; -}; - -struct eh_queue { - struct eh_node *head; - struct eh_node *tail; -}; - - -extern void push_label_entry PROTO((struct label_node **labelstack, rtx rlabel, tree tlabel)); -extern rtx pop_label_entry PROTO((struct label_node **labelstack)); -extern tree top_label_entry PROTO((struct label_node **labelstack)); - -extern struct eh_stack ehstack; -extern struct eh_queue ehqueue; -extern rtx catch_clauses; -extern tree protect_list; - -#endif - struct function; -extern void init_eh PROTO((void)); -extern void init_eh_for_function PROTO((void)); -extern void save_eh_status PROTO((struct function *p)); -extern void restore_eh_status PROTO((struct function *p)); -extern void add_eh_table_entry PROTO((int)); -extern int exception_table_p PROTO((void)); -extern void output_exception_table PROTO((void)); -extern rtx eh_outer_context PROTO((rtx)); -extern void emit_unwinder PROTO((void)); -extern void end_eh_unwinder PROTO((void)); -extern void find_handler_labels PROTO((void)); -extern void check_handler_labels PROTO((void)); - - -extern struct label_node *caught_return_label_stack; -extern struct label_node *false_label_stack; - -extern rtx exception_handler_labels; - -/* The rtx for the saved PC value. */ - -extern rtx eh_saved_pc_rtx; +struct inline_remap; + +/* Per-function EH data. Used only in except.c, but GC and others + manipulate pointers to the opaque type. */ +struct eh_status; + +/* Internal structure describing a region. */ +struct eh_region; + +/* Test: is exception handling turned on? */ +extern int doing_eh (int); + +/* Note that the current EH region (if any) may contain a throw, or a + call to a function which itself may contain a throw. */ +extern void note_eh_region_may_contain_throw (struct eh_region *); +extern void note_current_region_may_contain_throw (void); + +/* Invokes CALLBACK for every exception handler label. Only used by old + loop hackery; should not be used by new code. */ +extern void for_each_eh_label (void (*) (rtx)); + +/* Invokes CALLBACK for every exception region in the current function. */ +extern void for_each_eh_region (void (*) (struct eh_region *)); + +/* Determine if the given INSN can throw an exception. */ +extern bool can_throw_internal_1 (int); +extern bool can_throw_internal (rtx); +extern bool can_throw_external_1 (int); +extern bool can_throw_external (rtx); + +/* Set TREE_NOTHROW and cfun->all_throwers_are_sibcalls. */ +extern void set_nothrow_function_flags (void); + +/* After initial rtl generation, call back to finish generating + exception support code. */ +extern void finish_eh_generation (void); + +extern void init_eh (void); +extern void init_eh_for_function (void); + +extern rtx reachable_handlers (rtx); +extern void maybe_remove_eh_handler (rtx); + +extern void convert_from_eh_region_ranges (void); +extern void convert_to_eh_region_ranges (void); +extern void find_exception_handler_labels (void); +extern bool current_function_has_exception_handlers (void); +extern void output_function_exception_table (void); + +extern void expand_builtin_unwind_init (void); +extern rtx expand_builtin_eh_return_data_regno (tree); +extern rtx expand_builtin_extract_return_addr (tree); +extern void expand_builtin_init_dwarf_reg_sizes (tree); +extern rtx expand_builtin_frob_return_addr (tree); +extern rtx expand_builtin_dwarf_sp_column (void); +extern void expand_builtin_eh_return (tree, tree); +extern void expand_eh_return (void); +extern rtx expand_builtin_extend_pointer (tree); +extern rtx get_exception_pointer (struct function *); +extern rtx get_exception_filter (struct function *); +extern int duplicate_eh_regions (struct function *, struct inline_remap *); +extern int check_handled (tree, tree); + +extern void sjlj_emit_function_exit_after (rtx); + +extern struct eh_region *gen_eh_region_cleanup (struct eh_region *, + struct eh_region *); +extern struct eh_region *gen_eh_region_try (struct eh_region *); +extern struct eh_region *gen_eh_region_catch (struct eh_region *, tree); +extern struct eh_region *gen_eh_region_allowed (struct eh_region *, tree); +extern struct eh_region *gen_eh_region_must_not_throw (struct eh_region *); +extern int get_eh_region_number (struct eh_region *); +extern bool get_eh_region_may_contain_throw (struct eh_region *); +extern tree get_eh_region_tree_label (struct eh_region *); +extern void set_eh_region_tree_label (struct eh_region *, tree); + +extern void foreach_reachable_handler (int, bool, + void (*) (struct eh_region *, void *), + void *); + +extern void collect_eh_region_array (void); +extern void expand_resx_expr (tree); + +/* tree-eh.c */ +extern int lookup_stmt_eh_region (tree); + +/* If non-NULL, this is a function that returns an expression to be + executed if an unhandled exception is propagated out of a cleanup + region. For example, in C++, an exception thrown by a destructor + during stack unwinding is required to result in a call to + `std::terminate', so the C++ version of this function returns a + CALL_EXPR for `std::terminate'. */ +extern tree (*lang_protect_cleanup_actions) (void); + +/* Return true if type A catches type B. */ +extern int (*lang_eh_type_covers) (tree a, tree b); + +/* Map a type to a runtime object to match type. */ +extern tree (*lang_eh_runtime_type) (tree); + + +/* Just because the user configured --with-sjlj-exceptions=no doesn't + mean that we can use call frame exceptions. Detect that the target + has appropriate support. */ + +#ifndef MUST_USE_SJLJ_EXCEPTIONS +# if !(defined (EH_RETURN_DATA_REGNO) \ + && (defined (TARGET_UNWIND_INFO) \ + || (DWARF2_UNWIND_INFO \ + && (defined (EH_RETURN_HANDLER_RTX) \ + || defined (HAVE_eh_return))))) +# define MUST_USE_SJLJ_EXCEPTIONS 1 +# else +# define MUST_USE_SJLJ_EXCEPTIONS 0 +# endif +#endif -extern void exception_optimize PROTO((void)); +#ifdef CONFIG_SJLJ_EXCEPTIONS +# if CONFIG_SJLJ_EXCEPTIONS == 1 +# define USING_SJLJ_EXCEPTIONS 1 +# endif +# if CONFIG_SJLJ_EXCEPTIONS == 0 +# define USING_SJLJ_EXCEPTIONS 0 +# ifndef EH_RETURN_DATA_REGNO + #error "EH_RETURN_DATA_REGNO required" +# endif +# if !defined(EH_RETURN_HANDLER_RTX) && !defined(HAVE_eh_return) + #error "EH_RETURN_HANDLER_RTX or eh_return required" +# endif +# if !defined(DWARF2_UNWIND_INFO) && !defined(TARGET_UNWIND_INFO) + #error "{DWARF2,TARGET}_UNWIND_INFO required" +# endif +# endif +#else +# define USING_SJLJ_EXCEPTIONS MUST_USE_SJLJ_EXCEPTIONS +#endif