// -*- C++ -*- Exception handling and frame unwind runtime interface routines.
-// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
-// Free Software Foundation, Inc.
+// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
+// 2011 Free Software Foundation, Inc.
//
// 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)
+// the Free Software Foundation; either version 3, or (at your option)
// any later version.
//
// GCC is distributed in the hope that it will be useful,
// 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.
-
-// As a special exception, you may use this file as part of a free software
-// library without restriction. Specifically, if other files instantiate
-// templates or use macros or inline functions from this file, or you compile
-// this file and link it with other files to produce an executable, this
-// file does not by itself cause the resulting executable to be covered by
-// the GNU General Public License. This exception does not however
-// invalidate any other reasons why the executable file might be covered by
-// the GNU General Public License.
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
// This is derived from the C++ ABI for IA-64. Where we diverge
// for cross-architecture compatibility are noted with "@@@".
#include <cstddef>
#include "unwind.h"
#include <bits/atomic_word.h>
+#include <cxxabi.h>
#pragma GCC visibility push(default)
struct __cxa_exception
{
- // Manage this header.
- _Atomic_word referenceCount;
-
// Manage the exception object itself.
std::type_info *exceptionType;
- void (*exceptionDestructor)(void *);
+ void (*exceptionDestructor)(void *);
// The C++ standard has entertaining rules wrt calling set_terminate
// and set_unexpected in the middle of the exception cleanup process.
_Unwind_Exception unwindHeader;
};
+struct __cxa_refcounted_exception
+{
+ // Manage this header.
+ _Atomic_word referenceCount;
+ // __cxa_exception must be last, and no padding can be after it.
+ __cxa_exception exc;
+};
+
// A dependent C++ exception object consists of a wrapper around an unwind
// object header with additional C++ specific information, containing a pointer
// to a primary exception object.
#endif
};
-
-// The __cxa_eh_globals for the current thread can be obtained by using
-// either of the following functions. The "fast" version assumes at least
-// one prior call of __cxa_get_globals has been made from the current
-// thread, so no initialization is necessary.
-extern "C" __cxa_eh_globals *__cxa_get_globals () throw();
-extern "C" __cxa_eh_globals *__cxa_get_globals_fast () throw();
-
-// Allocate memory for the primary exception plus the thrown object.
-extern "C" void *__cxa_allocate_exception(std::size_t thrown_size) throw();
-
-// Free the space allocated for the primary exception.
-extern "C" void __cxa_free_exception(void *thrown_exception) throw();
-
-// Allocate memory for a dependent exception.
-extern "C" __cxa_dependent_exception*
-__cxa_allocate_dependent_exception() throw();
-
-// Free the space allocated for the dependent exception.
-extern "C" void
-__cxa_free_dependent_exception(__cxa_dependent_exception *ex) throw();
-
-// Throw the exception.
-extern "C" void __cxa_throw (void *thrown_exception,
- std::type_info *tinfo,
- void (*dest) (void *))
- __attribute__((noreturn));
-
-// Used to implement exception handlers.
-extern "C" void *__cxa_get_exception_ptr (void *) throw();
-extern "C" void *__cxa_begin_catch (void *) throw();
-extern "C" void __cxa_end_catch ();
-extern "C" void __cxa_rethrow () __attribute__((noreturn));
-
-// These facilitate code generation for recurring situations.
-extern "C" void __cxa_bad_cast ();
-extern "C" void __cxa_bad_typeid ();
-
// @@@ These are not directly specified by the IA-64 C++ ABI.
// Handles re-checking the exception specification if unexpectedHandler
// throws, and if bad_exception needs to be thrown. Called from the
// compiler.
-extern "C" void __cxa_call_unexpected (void *) __attribute__((noreturn));
-extern "C" void __cxa_call_terminate (void*) __attribute__((noreturn));
+extern "C" void __cxa_call_unexpected (void *) __attribute__((__noreturn__));
+extern "C" void __cxa_call_terminate (_Unwind_Exception*) throw ()
+ __attribute__((__noreturn__));
#ifdef __ARM_EABI_UNWINDER__
// Arm EABI specified routines.
ctm_succeeded = 1,
ctm_succeeded_with_ptr_to_base = 2
} __cxa_type_match_result;
-extern "C" bool __cxa_type_match(_Unwind_Exception*, const std::type_info*,
- bool, void**);
-extern "C" void __cxa_begin_cleanup (_Unwind_Exception*);
+extern "C" __cxa_type_match_result __cxa_type_match(_Unwind_Exception*,
+ const std::type_info*,
+ bool, void**);
+extern "C" bool __cxa_begin_cleanup (_Unwind_Exception*);
extern "C" void __cxa_end_cleanup (void);
#endif
+// Handles cleanup from transactional memory restart.
+extern "C" void __cxa_tm_cleanup (void *, void *, unsigned int) throw();
+
// Invokes given handler, dying appropriately if the user handler was
// so inconsiderate as to return.
-extern void __terminate(std::terminate_handler) __attribute__((noreturn));
-extern void __unexpected(std::unexpected_handler) __attribute__((noreturn));
+extern void __terminate(std::terminate_handler) throw ()
+ __attribute__((__noreturn__));
+extern void __unexpected(std::unexpected_handler)
+ __attribute__((__noreturn__));
// The current installed user handlers.
extern std::terminate_handler __terminate_handler;
return reinterpret_cast<__cxa_exception *>(exc + 1) - 1;
}
+// Acquire the C++ refcounted exception header from the C++ object.
+static inline __cxa_refcounted_exception *
+__get_refcounted_exception_header_from_obj (void *ptr)
+{
+ return reinterpret_cast<__cxa_refcounted_exception *>(ptr) - 1;
+}
+
+// Acquire the C++ refcounted exception header from the generic exception
+// header.
+static inline __cxa_refcounted_exception *
+__get_refcounted_exception_header_from_ue (_Unwind_Exception *exc)
+{
+ return reinterpret_cast<__cxa_refcounted_exception *>(exc + 1) - 1;
+}
+
static inline __cxa_dependent_exception *
__get_dependent_exception_from_ue (_Unwind_Exception *exc)
{
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