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Diffstat (limited to 'contrib/gcc/except.h')
| -rw-r--r-- | contrib/gcc/except.h | 401 |
1 files changed, 0 insertions, 401 deletions
diff --git a/contrib/gcc/except.h b/contrib/gcc/except.h deleted file mode 100644 index a8c4f9c8004f..000000000000 --- a/contrib/gcc/except.h +++ /dev/null @@ -1,401 +0,0 @@ -/* Exception Handling interface routines. - Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc. - Contributed by Mike Stump <mrs@cygnus.com>. - -This file is part of GNU CC. - -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. - -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. - -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. */ - -#if !defined(NULL_RTX) && !defined(rtx) -typedef struct rtx_def *_except_rtx; -#define rtx _except_rtx -#endif - -/* The label generated by expand_builtin_eh_return. */ - -extern rtx eh_return_stub_label; - -#ifdef TREE_CODE - -/* A stack of labels. CHAIN points to the next entry in the stack. */ - -struct label_node { - union { - rtx rlabel; - tree tlabel; - } u; - struct label_node *chain; -}; - -/* An eh_entry is used to describe one exception handling region. - - OUTER_CONTEXT is the label used for rethrowing into the outer context. - - EXCEPTION_HANDLER_LABEL is the label corresponding to the handler - for this region. - - LABEL_USED indicates whether a CATCH block has already used this - label or not. New ones are needed for additional catch blocks if - it has. - - FALSE_LABEL is used when either setjmp/longjmp exceptions are in - use, or old style table exceptions. It contains the label for - branching to the next runtime type check as handlers are processed. - - FINALIZATION is the tree codes for the handler, or is NULL_TREE if - one hasn't been generated yet, or is integer_zero_node to mark the - end of a group of try blocks. */ - -struct eh_entry { - rtx outer_context; - rtx exception_handler_label; - tree finalization; - int label_used; - rtx false_label; - rtx rethrow_label; -}; - -/* A list of EH_ENTRYs. ENTRY is the entry; CHAIN points to the next - entry in the list, or is NULL if this is the last entry. */ - -struct eh_node { - struct eh_entry *entry; - struct eh_node *chain; -}; - -/* A stack of EH_ENTRYs. TOP is the topmost entry on the stack. TOP is - NULL if the stack is empty. */ - -struct eh_stack { - struct eh_node *top; -}; - -/* A queue of EH_ENTRYs. HEAD is the front of the queue; TAIL is the - end (the latest entry). HEAD and TAIL are NULL if the queue is - empty. */ - -struct eh_queue { - struct eh_node *head; - struct eh_node *tail; -}; - -/* Start an exception handling region. All instructions emitted after - this point are considered to be part of the region until - expand_eh_region_end () is invoked. */ - -extern void expand_eh_region_start PROTO((void)); - -/* Just like expand_eh_region_start, except if a cleanup action is - entered on the cleanup chain, the TREE_PURPOSE of the element put - on the chain is DECL. DECL should be the associated VAR_DECL, if - any, otherwise it should be NULL_TREE. */ - -extern void expand_eh_region_start_for_decl PROTO((tree)); - -/* Start an exception handling region for the given cleanup action. - All instructions emitted after this point are considered to be part - of the region until expand_eh_region_end () is invoked. CLEANUP is - the cleanup action to perform. The return value is true if the - exception region was optimized away. If that case, - expand_eh_region_end does not need to be called for this cleanup, - nor should it be. - - This routine notices one particular common case in C++ code - generation, and optimizes it so as to not need the exception - region. */ - -extern int expand_eh_region_start_tree PROTO((tree, tree)); - -/* End an exception handling region. The information about the region - is found on the top of ehstack. - - HANDLER is either the cleanup for the exception region, or if we're - marking the end of a try block, HANDLER is integer_zero_node. - - HANDLER will be transformed to rtl when expand_leftover_cleanups () - is invoked. */ - -extern void expand_eh_region_end PROTO((tree)); - -/* Push RLABEL or TLABEL onto LABELSTACK. Only one of RLABEL or TLABEL - should be set; the other must be NULL. */ - -extern void push_label_entry PROTO((struct label_node **labelstack, rtx rlabel, tree tlabel)); - -/* Pop the topmost entry from LABELSTACK and return its value as an - rtx node. If LABELSTACK is empty, return NULL. */ - -extern rtx pop_label_entry PROTO((struct label_node **labelstack)); - -/* Return the topmost entry of LABELSTACK as a tree node, or return - NULL_TREE if LABELSTACK is empty. */ - -extern tree top_label_entry PROTO((struct label_node **labelstack)); - -/* A set of insns for the catch clauses in the current function. They - will be emitted at the end of the current function. */ - -extern rtx catch_clauses; - -#endif - -/* Test: is exception handling turned on? */ - -extern int doing_eh PROTO ((int)); - -/* Toplevel initialization for EH. */ - -void set_exception_lang_code PROTO((int)); -void set_exception_version_code PROTO((int)); - -/* A list of handlers asocciated with an exception region. HANDLER_LABEL - is the the label that control should be transfered to if the data - in TYPE_INFO matches an exception. a value of NULL_TREE for TYPE_INFO - means This is a cleanup, and must always be called. A value of - CATCH_ALL_TYPE works like a cleanup, but a call to the runtime matcher - is still performed to avoid being caught by a different language - exception. NEXT is a pointer to the next handler for this region. - NULL means there are no more. */ - -typedef struct handler_info -{ - rtx handler_label; - int handler_number; - void *type_info; - struct handler_info *next; -} handler_info; - - -/* Add new handler information to an exception range. The first parameter - specifies the range number (returned from new_eh_entry()). The second - parameter specifies the handler. By default the handler is inserted at - the end of the list. A handler list may contain only ONE NULL_TREE - typeinfo entry. Regardless where it is positioned, a NULL_TREE entry - is always output as the LAST handler in the exception table for a region. */ - -void add_new_handler PROTO((int, struct handler_info *)); - -/* Remove a handler label. The handler label is being deleted, so all - regions which reference this handler should have it removed from their - list of possible handlers. Any region which has the final handler - removed can be deleted. */ - -void remove_handler PROTO((rtx)); - -/* Create a new handler structure initialized with the handler label and - typeinfo fields passed in. */ - -struct handler_info *get_new_handler PROTO((rtx, void *)); - -/* Make a duplicate of an exception region by copying all the handlers - for an exception region. Return the new handler index. */ - -int duplicate_eh_handlers PROTO((int, int, rtx (*)(rtx))); - -/* map symbol refs for rethrow */ - -rtx rethrow_symbol_map PROTO((rtx, rtx (*)(rtx))); - -/* Is the rethrow label for a region used? */ - -int rethrow_used PROTO((int)); - -/* Return the region number a this is the rethrow label for. */ - -int eh_region_from_symbol PROTO((rtx)); - -/* Get a pointer to the first handler in an exception region's list. */ - -struct handler_info *get_first_handler PROTO((int)); - -/* Find all the runtime handlers type matches currently referenced */ - -int find_all_handler_type_matches PROTO((void ***)); - -extern void init_eh PROTO((void)); - -/* Initialization for the per-function EH data. */ - -extern void init_eh_for_function PROTO((void)); - -/* Generate an exception label. Use instead of gen_label_rtx */ - -extern rtx gen_exception_label PROTO((void)); - -/* Adds an EH table entry for EH entry number N. Called from - final_scan_insn for NOTE_INSN_EH_REGION_BEG. */ - -extern void add_eh_table_entry PROTO((int n)); - -/* Start a catch clause, triggered by runtime value paramter. */ - -#ifdef TREE_CODE -extern void start_catch_handler PROTO((tree)); -#endif - -/* End an individual catch clause. */ - -extern void end_catch_handler PROTO((void)); - -/* Returns a non-zero value if we need to output an exception table. */ - -extern int exception_table_p PROTO((void)); - -/* Outputs the exception table if we have one. */ - -extern void output_exception_table PROTO((void)); - -/* Given a return address in ADDR, determine the address we should use - to find the corresponding EH region. */ - -extern rtx eh_outer_context PROTO((rtx addr)); - -/* Called at the start of a block of try statements for which there is - a supplied catch handler. */ - -extern void expand_start_try_stmts PROTO((void)); - -/* Called at the start of a block of catch statements. It terminates the - previous set of try statements. */ - -extern void expand_start_all_catch PROTO((void)); - -/* Called at the end of a block of catch statements. */ - -extern void expand_end_all_catch PROTO((void)); - -#ifdef TREE_CODE -/* 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 PROTO((tree handler)); -#endif - -/* End all of the pending exception regions that have handlers added with - push_protect_entry (). */ - -extern void end_protect_partials PROTO((void)); - -/* An internal throw. */ - -extern void expand_internal_throw PROTO((void)); - -/* Called from expand_exception_blocks and expand_end_catch_block to - expand and pending handlers. */ - -extern void expand_leftover_cleanups PROTO((void)); - -/* If necessary, emit insns to get EH context for the current - function. */ - -extern void emit_eh_context PROTO((void)); - -/* Builds a list of handler labels and puts them in the global - variable exception_handler_labels. */ - -extern void find_exception_handler_labels PROTO((void)); - -/* Determine if an arbitrary label is an exception label */ - -extern int is_exception_handler_label PROTO((int)); - -/* Performs sanity checking on the check_exception_handler_labels - list. */ - -extern void check_exception_handler_labels PROTO((void)); - -/* A stack used to keep track of the label used to resume normal program - flow out of the current exception handler region. */ - -extern struct label_node *caught_return_label_stack; - -/* Keeps track of the label used as the context of a throw to rethrow an - exception to the outer exception region. */ - -extern struct label_node *outer_context_label_stack; - -/* A random area used for purposes elsewhere. */ - -extern struct label_node *false_label_stack; - -/* A list of labels used for exception handlers. It is created by - find_exception_handler_labels for the optimization passes. */ - -extern rtx exception_handler_labels; - -/* Performs optimizations for exception handling, such as removing - unnecessary exception regions. Invoked from jump_optimize (). */ - -extern void exception_optimize PROTO((void)); - -/* Return EH context (and set it up once per fn). */ -extern rtx get_eh_context PROTO((void)); - -/* Get the dynamic handler chain. */ -extern rtx get_dynamic_handler_chain PROTO((void)); - -/* Get the dynamic cleanup chain. */ -extern rtx get_dynamic_cleanup_chain PROTO((void)); - -/* Throw an exception. */ - -extern void emit_throw PROTO((void)); - -/* One to use setjmp/longjmp method of generating code. */ - -extern int exceptions_via_longjmp; - -/* One to enable asynchronous exception support. */ - -extern int asynchronous_exceptions; - -/* One to protect cleanup actions with a handler that calls - __terminate, zero otherwise. */ - -extern int protect_cleanup_actions_with_terminate; - -#ifdef TREE_CODE -extern tree protect_with_terminate PROTO((tree)); -#endif - -extern void expand_fixup_region_start PROTO((void)); -#ifdef TREE_CODE -extern void expand_fixup_region_end PROTO((tree)); -#endif - -/* Various hooks for the DWARF 2 __throw routine. */ - -void expand_builtin_unwind_init PROTO((void)); -rtx expand_builtin_dwarf_fp_regnum PROTO((void)); -#ifdef TREE_CODE -rtx expand_builtin_frob_return_addr PROTO((tree)); -rtx expand_builtin_extract_return_addr PROTO((tree)); -rtx expand_builtin_dwarf_reg_size PROTO((tree, rtx)); -void expand_builtin_eh_return PROTO((tree, tree, tree)); -#endif -void expand_eh_return PROTO((void)); - - -/* Checking whether 2 instructions are within the same exception region. */ - -int in_same_eh_region PROTO((rtx, rtx)); -void free_insn_eh_region PROTO((void)); -void init_insn_eh_region PROTO((rtx, int)); - -#ifdef rtx -#undef rtx -#endif |