X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fexcept.h;h=1f96477f2e0366d5320a368f73e08b4e0fd1b494;hb=1b575dc71d765379aa36d4de406c8da4b17c3a5c;hp=39500a030a7497cd88fbf281f83c7d01543a556e;hpb=a2b7c75dfe8268816acc5a9002c2eace41afe51f;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/except.h b/gcc/except.h index 39500a030a7..1f96477f2e0 100644 --- a/gcc/except.h +++ b/gcc/except.h @@ -1,41 +1,27 @@ /* Exception Handling interface routines. - Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001 + Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 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, 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301, USA. */ -#ifndef TREE_CODE -union tree_node; -#define tree union tree_node * -#endif - -#ifndef RTX_CODE -struct rtx_def; -#define rtx struct rtx_def * -#endif - -#ifndef GCC_VARRAY_H -struct varray_head_tag; -#define varray_type struct varray_head_tag * -#endif - +struct function; /* Per-function EH data. Used only in except.c, but GC and others manipulate pointers to the opaque type. */ @@ -45,148 +31,121 @@ struct eh_status; struct eh_region; /* Test: is exception handling turned on? */ -extern int doing_eh PARAMS ((int)); - -/* Start an exception handling region. All instructions emitted after - this point are considered to be part of the region until an - expand_eh_region_end variant is invoked. */ -extern void expand_eh_region_start PARAMS ((void)); - -/* End an exception handling region for a cleanup. HANDLER is an - expression to expand for the cleanup. */ -extern void expand_eh_region_end_cleanup PARAMS ((tree)); - -/* End an exception handling region for a try block, and prepares - for subsequent calls to expand_start_catch. */ -extern void expand_start_all_catch PARAMS ((void)); - -/* Begin a catch clause. TYPE is an object to be matched by the - runtime, or null if this is a catch-all clause. */ -extern void expand_start_catch PARAMS ((tree)); +extern int doing_eh (int); -/* End a catch clause. Control will resume after the try/catch block. */ -extern void expand_end_catch PARAMS ((void)); +/* 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); -/* End a sequence of catch handlers for a try block. */ -extern void expand_end_all_catch PARAMS ((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)); -/* End an exception region for an exception type filter. ALLOWED is a - TREE_LIST of TREE_VALUE objects to be matched by the runtime. - FAILURE is a function to invoke if a mismatch ocurrs. */ -extern void expand_eh_region_end_allowed PARAMS ((tree, tree)); - -/* End an exception region for a must-not-throw filter. FAILURE is a - function to invoke if an uncaught exception propagates this far. */ -extern void expand_eh_region_end_must_not_throw PARAMS ((tree)); - -/* End an exception region for a throw. No handling goes on here, - but it's the easiest way for the front-end to indicate what type - is being thrown. */ -extern void expand_eh_region_end_throw PARAMS ((tree)); - -/* End a fixup region. Within this region the cleanups for the immediately - enclosing region are _not_ run. This is used for goto cleanup to avoid - destroying an object twice. */ -extern void expand_eh_region_end_fixup PARAMS ((tree)); - -/* Begin a region that will contain entries created with - add_partial_entry. */ -extern void begin_protect_partials PARAMS ((void)); - -/* Create a new exception region and add the handler for the region - onto a list. These regions will be ended (and their handlers emitted) - when end_protect_partials is invoked. */ -extern void add_partial_entry PARAMS ((tree)); - -/* End all of the pending exception regions that have handlers added with - add_partial_entry. */ -extern void end_protect_partials PARAMS ((void)); - - -/* A list of labels used for exception handlers. */ -extern rtx exception_handler_labels; +/* 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 PARAMS ((rtx)); -extern bool can_throw_external PARAMS ((rtx)); +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); -/* Return nonzero if nothing in this function can throw. */ -extern bool nothrow_function_p PARAMS ((void)); +/* 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 PARAMS ((void)); - -extern void init_eh PARAMS ((void)); -extern void init_eh_for_function PARAMS ((void)); - -extern rtx reachable_handlers PARAMS ((rtx)); -extern void maybe_remove_eh_handler PARAMS ((rtx)); - -extern void convert_from_eh_region_ranges PARAMS ((void)); -extern void convert_to_eh_region_ranges PARAMS ((void)); -extern void find_exception_handler_labels PARAMS ((void)); -extern void output_function_exception_table PARAMS ((void)); - -extern void expand_builtin_unwind_init PARAMS ((void)); -extern rtx expand_builtin_eh_return_data_regno PARAMS ((tree)); -extern rtx expand_builtin_extract_return_addr PARAMS ((tree)); -extern void expand_builtin_init_dwarf_reg_sizes PARAMS ((tree)); -extern rtx expand_builtin_frob_return_addr PARAMS ((tree)); -extern rtx expand_builtin_dwarf_fp_regnum PARAMS ((void)); -extern void expand_builtin_eh_return PARAMS ((tree, tree)); -extern void expand_eh_return PARAMS ((void)); - -extern rtx get_exception_pointer PARAMS ((struct function *)); - -struct function; -struct inline_remap; -extern int duplicate_eh_regions PARAMS ((struct function *, - struct inline_remap *)); - -extern void sjlj_emit_function_exit_after PARAMS ((rtx)); - +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 propogated out of a cleanup + 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) PARAMS ((void)); +extern tree (*lang_protect_cleanup_actions) (void); /* Return true if type A catches type B. */ -extern int (*lang_eh_type_covers) PARAMS ((tree a, tree 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) PARAMS ((tree)); - -#ifndef TREE_CODE -#undef tree -#endif - -#ifndef RTX_CODE -#undef rtx -#endif - -#ifndef GCC_VARRAY_H -#undef varray_type -#endif +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. */ -#if ! (defined (EH_RETURN_DATA_REGNO) \ - && (defined (IA64_UNWIND_INFO) \ +#ifndef MUST_USE_SJLJ_EXCEPTIONS +# if !(defined (EH_RETURN_DATA_REGNO) \ + && (defined (TARGET_UNWIND_INFO) \ || (DWARF2_UNWIND_INFO \ - && defined (EH_RETURN_STACKADJ_RTX) \ && (defined (EH_RETURN_HANDLER_RTX) \ || defined (HAVE_eh_return))))) -#define MUST_USE_SJLJ_EXCEPTIONS 1 -#else -#define MUST_USE_SJLJ_EXCEPTIONS 0 +# define MUST_USE_SJLJ_EXCEPTIONS 1 +# else +# define MUST_USE_SJLJ_EXCEPTIONS 0 +# endif #endif #ifdef CONFIG_SJLJ_EXCEPTIONS @@ -198,16 +157,26 @@ extern tree (*lang_eh_runtime_type) PARAMS ((tree)); # ifndef EH_RETURN_DATA_REGNO #error "EH_RETURN_DATA_REGNO required" # endif -# ifndef EH_RETURN_STACKADJ_RTX - #error "EH_RETURN_STACKADJ_RTX 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(IA64_UNWIND_INFO) - #error "{DWARF2,IA64}_UNWIND_INFO required" +# 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