/* Exception Handling interface routines.
- Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
- 2007, 2008, 2009 Free Software Foundation, Inc.
+ Copyright (C) 1996-2015 Free Software Foundation, Inc.
Contributed by Mike Stump <mrs@cygnus.com>.
This file is part of GCC.
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
-#include "sbitmap.h"
-#include "vecprim.h"
+/* No include guards here, but define an include file marker anyway, so
+ that the compiler can keep track of where this file is included. This
+ is e.g. used to avoid including this file in front-end specific files. */
+#ifndef GCC_EXCEPT_H
+#define GCC_EXCEPT_H
+
struct function;
struct eh_region_d;
-struct pointer_map_t;
/* The type of an exception region. */
enum eh_region_type
/* TRY regions implement catching an exception. The list of types associated
with the attached catch handlers is examined in order by the runtime and
- control is transfered to the appropriate handler. Note that a NULL type
+ control is transferred to the appropriate handler. Note that a NULL type
list is a catch-all handler, and that it will catch *all* exceptions
including those originating from a different language. */
ERT_TRY,
/* The region with which this landing pad is associated. */
struct eh_region_d *region;
- /* At the gimple level, the location to which control will be transfered
+ /* At the gimple level, the location to which control will be transferred
for this landing pad. There can be both EH and normal edges into the
block containing the post-landing-pad label. */
tree post_landing_pad;
EXCEPTION_RECEIVER pattern will be expanded here, as well as other
bookkeeping specific to exceptions. There must not be normal edges
into the block containing the landing-pad label. */
- rtx landing_pad;
+ rtx_code_label *landing_pad;
/* The index of this landing pad within fun->eh->lp_array. */
int index;
typedef struct eh_catch_d *eh_catch;
typedef struct eh_region_d *eh_region;
-DEF_VEC_P(eh_region);
-DEF_VEC_ALLOC_P(eh_region, gc);
-DEF_VEC_ALLOC_P(eh_region, heap);
-DEF_VEC_P(eh_landing_pad);
-DEF_VEC_ALLOC_P(eh_landing_pad, gc);
/* The exception status for each function. */
eh_region region_tree;
/* The same information as an indexable array. */
- VEC(eh_region,gc) *region_array;
+ vec<eh_region, va_gc> *region_array;
/* The landing pads as an indexable array. */
- VEC(eh_landing_pad,gc) *lp_array;
+ vec<eh_landing_pad, va_gc> *lp_array;
/* At the gimple level, a mapping from gimple statement to landing pad
or must-not-throw region. See record_stmt_eh_region. */
- htab_t GTY((param_is (struct throw_stmt_node))) throw_stmt_table;
+ hash_map<gimple, int> *GTY(()) throw_stmt_table;
/* All of the runtime type data used by the function. These objects
are emitted to the lang-specific-data-area for the function. */
- VEC(tree,gc) *ttype_data;
+ vec<tree, va_gc> *ttype_data;
/* The table of all action chains. These encode the eh_region tree in
a compact form for use by the runtime, and is also emitted to the
lang-specific-data-area. Note that the ARM EABI uses a different
format for the encoding than all other ports. */
union eh_status_u {
- VEC(tree,gc) * GTY((tag ("1"))) arm_eabi;
- VEC(uchar,gc) * GTY((tag ("0"))) other;
+ vec<tree, va_gc> *GTY((tag ("1"))) arm_eabi;
+ vec<uchar, va_gc> *GTY((tag ("0"))) other;
} GTY ((desc ("targetm.arm_eabi_unwinder"))) ehspec_data;
};
-/* Test: is exception handling turned on? */
-extern int doing_eh (int);
-
/* 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));
-extern void init_eh (void);
extern void init_eh_for_function (void);
extern void remove_eh_landing_pad (eh_landing_pad);
extern void remove_eh_handler (eh_region);
+extern void remove_unreachable_eh_regions (sbitmap);
extern bool current_function_has_exception_handlers (void);
extern void output_function_exception_table (const char *);
extern void expand_builtin_eh_return (tree, tree);
extern void expand_eh_return (void);
extern rtx expand_builtin_extend_pointer (tree);
+extern void expand_dw2_landing_pad_for_region (eh_region);
typedef tree (*duplicate_eh_regions_map) (tree, void *);
-extern struct pointer_map_t *duplicate_eh_regions
+extern hash_map<void *, void *> *duplicate_eh_regions
(struct function *, eh_region, int, duplicate_eh_regions_map, void *);
-extern void sjlj_emit_function_exit_after (rtx);
+extern void sjlj_emit_function_exit_after (rtx_insn *);
+extern void update_sjlj_context (void);
extern eh_region gen_eh_region_cleanup (eh_region);
extern eh_region gen_eh_region_try (eh_region);
extern eh_region eh_region_outermost (struct function *, eh_region, eh_region);
-extern void make_reg_eh_region_note (rtx insn, int ecf_flags, int lp_nr);
-extern void make_reg_eh_region_note_nothrow_nononlocal (rtx);
+extern void make_reg_eh_region_note (rtx_insn *insn, int ecf_flags, int lp_nr);
+extern void make_reg_eh_region_note_nothrow_nononlocal (rtx_insn *);
extern void verify_eh_tree (struct function *);
extern void dump_eh_tree (FILE *, struct function *);
extern eh_region get_eh_region_from_rtx (const_rtx);
extern eh_landing_pad get_eh_landing_pad_from_rtx (const_rtx);
-/* If non-NULL, this is a function that returns a function decl 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
- FUNCTION_DECL 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);
-
-
-/* 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 0
-# else
-# define MUST_USE_SJLJ_EXCEPTIONS 1
-# 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
-# if !defined(EH_RETURN_DATA_REGNO)
- #error "EH_RETURN_DATA_REGNO required"
-# endif
-# if ! (defined(TARGET_UNWIND_INFO) || DWARF2_UNWIND_INFO)
- #error "{DWARF2,TARGET}_UNWIND_INFO required"
-# endif
-# if !defined(TARGET_UNWIND_INFO) \
- && !(defined(EH_RETURN_HANDLER_RTX) || defined(HAVE_eh_return))
- #error "EH_RETURN_HANDLER_RTX or eh_return required"
-# endif
-/* Usually the above error checks will have already triggered an
- error, but backends may set MUST_USE_SJLJ_EXCEPTIONS for their own
- reasons. */
-# if MUST_USE_SJLJ_EXCEPTIONS
- #error "Must use SJLJ exceptions but configured not to"
-# endif
-# endif
-#else
-# define USING_SJLJ_EXCEPTIONS MUST_USE_SJLJ_EXCEPTIONS
-#endif
+extern void finish_eh_generation (void);
struct GTY(()) throw_stmt_node {
gimple stmt;
int lp_nr;
};
-extern struct htab *get_eh_throw_stmt_table (struct function *);
-extern void set_eh_throw_stmt_table (struct function *, struct htab *);
+extern hash_map<gimple, int> *get_eh_throw_stmt_table (struct function *);
+extern void set_eh_throw_stmt_table (function *, hash_map<gimple, int> *);
enum eh_personality_kind {
eh_personality_none,
for ((R) = (FN)->eh->region_tree; (R) != NULL; (R) = ehr_next (R, NULL))
#define FOR_ALL_EH_REGION(R) FOR_ALL_EH_REGION_FN (R, cfun)
+
+#endif
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