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Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/except.h')
-rw-r--r-- | gcc-4.2.1-5666.3/gcc/except.h | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/except.h b/gcc-4.2.1-5666.3/gcc/except.h new file mode 100644 index 000000000..1f96477f2 --- /dev/null +++ b/gcc-4.2.1-5666.3/gcc/except.h @@ -0,0 +1,182 @@ +/* Exception Handling interface routines. + Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 + Free Software Foundation, Inc. + Contributed by Mike Stump <mrs@cygnus.com>. + +This file is part of GCC. + +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. + +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 GCC; see the file COPYING. If not, write to the Free +Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301, USA. */ + + +struct function; + +/* 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, bool); +extern bool can_throw_internal (rtx); +extern bool can_throw_external_1 (int, bool); +extern bool can_throw_external (rtx); + +/* Set TREE_NOTHROW and cfun->all_throwers_are_sibcalls. */ +extern unsigned int 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 unsigned int 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 *); +typedef tree (*duplicate_eh_regions_map) (tree, void *); +extern int duplicate_eh_regions (struct function *, duplicate_eh_regions_map, + void *, int, int); + +extern void sjlj_emit_function_exit_after (rtx); +extern void default_init_unwind_resume_libfunc (void); + +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); +extern void verify_eh_tree (struct function *); +extern void dump_eh_tree (FILE *, struct function *); +extern bool eh_region_outer_p (struct function *, int, int); +extern int eh_region_outermost (struct function *, int, int); + +/* tree-eh.c */ +extern void add_stmt_to_eh_region_fn (struct function *, tree, int); +extern bool remove_stmt_from_eh_region_fn (struct function *, tree); +extern int lookup_stmt_eh_region_fn (struct function *, tree); +extern int lookup_stmt_eh_region (tree); +extern bool verify_eh_edges (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 + +#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 + +struct throw_stmt_node GTY(()) +{ + tree stmt; + int region_nr; +}; + +extern struct htab *get_eh_throw_stmt_table (struct function *); +extern void set_eh_throw_stmt_table (struct function *, struct htab *); + +#ifdef ENABLE_CHECKING +extern void verify_eh_throw_table_statements (void); +#endif |