diff options
Diffstat (limited to 'gcc-4.4.3/libstdc++-v3/libsupc++/unwind-cxx.h')
| -rw-r--r-- | gcc-4.4.3/libstdc++-v3/libsupc++/unwind-cxx.h | 412 |
1 files changed, 0 insertions, 412 deletions
diff --git a/gcc-4.4.3/libstdc++-v3/libsupc++/unwind-cxx.h b/gcc-4.4.3/libstdc++-v3/libsupc++/unwind-cxx.h deleted file mode 100644 index 1420db368..000000000 --- a/gcc-4.4.3/libstdc++-v3/libsupc++/unwind-cxx.h +++ /dev/null @@ -1,412 +0,0 @@ -// -*- C++ -*- Exception handling and frame unwind runtime interface routines. -// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 -// 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 3, 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. -// -// 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 "@@@". - -#ifndef _UNWIND_CXX_H -#define _UNWIND_CXX_H 1 - -// Level 2: C++ ABI - -#include <typeinfo> -#include <exception> -#include <cstddef> -#include "unwind.h" -#include <bits/atomic_word.h> - -#pragma GCC visibility push(default) - -namespace __cxxabiv1 -{ - -// A primary C++ exception object consists of a header, which is a wrapper -// around an unwind object header with additional C++ specific information, -// followed by the exception object itself. - -struct __cxa_exception -{ - // Manage the exception object itself. - std::type_info *exceptionType; - void (*exceptionDestructor)(void *); - - // The C++ standard has entertaining rules wrt calling set_terminate - // and set_unexpected in the middle of the exception cleanup process. - std::unexpected_handler unexpectedHandler; - std::terminate_handler terminateHandler; - - // The caught exception stack threads through here. - __cxa_exception *nextException; - - // How many nested handlers have caught this exception. A negated - // value is a signal that this object has been rethrown. - int handlerCount; - -#ifdef __ARM_EABI_UNWINDER__ - // Stack of exceptions in cleanups. - __cxa_exception* nextPropagatingException; - - // The nuber of active cleanup handlers for this exception. - int propagationCount; -#else - // Cache parsed handler data from the personality routine Phase 1 - // for Phase 2 and __cxa_call_unexpected. - int handlerSwitchValue; - const unsigned char *actionRecord; - const unsigned char *languageSpecificData; - _Unwind_Ptr catchTemp; - void *adjustedPtr; -#endif - - // The generic exception header. Must be last. - _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. - -struct __cxa_dependent_exception -{ - // The primary exception this thing depends on. - void *primaryException; - - // The C++ standard has entertaining rules wrt calling set_terminate - // and set_unexpected in the middle of the exception cleanup process. - std::unexpected_handler unexpectedHandler; - std::terminate_handler terminateHandler; - - // The caught exception stack threads through here. - __cxa_exception *nextException; - - // How many nested handlers have caught this exception. A negated - // value is a signal that this object has been rethrown. - int handlerCount; - -#ifdef __ARM_EABI_UNWINDER__ - // Stack of exceptions in cleanups. - __cxa_exception* nextPropagatingException; - - // The nuber of active cleanup handlers for this exception. - int propagationCount; -#else - // Cache parsed handler data from the personality routine Phase 1 - // for Phase 2 and __cxa_call_unexpected. - int handlerSwitchValue; - const unsigned char *actionRecord; - const unsigned char *languageSpecificData; - _Unwind_Ptr catchTemp; - void *adjustedPtr; -#endif - - // The generic exception header. Must be last. - _Unwind_Exception unwindHeader; -}; - -// Each thread in a C++ program has access to a __cxa_eh_globals object. -struct __cxa_eh_globals -{ - __cxa_exception *caughtExceptions; - unsigned int uncaughtExceptions; -#ifdef __ARM_EABI_UNWINDER__ - __cxa_exception* propagatingExceptions; -#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)); - -#ifdef __ARM_EABI_UNWINDER__ -// Arm EABI specified routines. -typedef enum { - ctm_failed = 0, - 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" void __cxa_end_cleanup (void); -#endif - -// 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)); - -// The current installed user handlers. -extern std::terminate_handler __terminate_handler; -extern std::unexpected_handler __unexpected_handler; - -// These are explicitly GNU C++ specific. - -// Acquire the C++ exception header from the C++ object. -static inline __cxa_exception * -__get_exception_header_from_obj (void *ptr) -{ - return reinterpret_cast<__cxa_exception *>(ptr) - 1; -} - -// Acquire the C++ exception header from the generic exception header. -static inline __cxa_exception * -__get_exception_header_from_ue (_Unwind_Exception *exc) -{ - 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) -{ - return reinterpret_cast<__cxa_dependent_exception *>(exc + 1) - 1; -} - -#ifdef __ARM_EABI_UNWINDER__ -static inline bool -__is_gxx_exception_class(_Unwind_Exception_Class c) -{ - // TODO: Take advantage of the fact that c will always be word aligned. - return c[0] == 'G' - && c[1] == 'N' - && c[2] == 'U' - && c[3] == 'C' - && c[4] == 'C' - && c[5] == '+' - && c[6] == '+' - && (c[7] == '\0' || c[7] == '\x01'); -} - -// Only checks for primary or dependent, but not that it is a C++ exception at -// all. -static inline bool -__is_dependent_exception(_Unwind_Exception_Class c) -{ - return c[7] == '\x01'; -} - -static inline void -__GXX_INIT_PRIMARY_EXCEPTION_CLASS(_Unwind_Exception_Class c) -{ - c[0] = 'G'; - c[1] = 'N'; - c[2] = 'U'; - c[3] = 'C'; - c[4] = 'C'; - c[5] = '+'; - c[6] = '+'; - c[7] = '\0'; -} - -static inline void -__GXX_INIT_DEPENDENT_EXCEPTION_CLASS(_Unwind_Exception_Class c) -{ - c[0] = 'G'; - c[1] = 'N'; - c[2] = 'U'; - c[3] = 'C'; - c[4] = 'C'; - c[5] = '+'; - c[6] = '+'; - c[7] = '\x01'; -} - -static inline bool -__is_gxx_forced_unwind_class(_Unwind_Exception_Class c) -{ - return c[0] == 'G' - && c[1] == 'N' - && c[2] == 'U' - && c[3] == 'C' - && c[4] == 'F' - && c[5] == 'O' - && c[6] == 'R' - && c[7] == '\0'; -} - -static inline void -__GXX_INIT_FORCED_UNWIND_CLASS(_Unwind_Exception_Class c) -{ - c[0] = 'G'; - c[1] = 'N'; - c[2] = 'U'; - c[3] = 'C'; - c[4] = 'F'; - c[5] = 'O'; - c[6] = 'R'; - c[7] = '\0'; -} - -static inline void* -__gxx_caught_object(_Unwind_Exception* eo) -{ - return (void*)eo->barrier_cache.bitpattern[0]; -} -#else // !__ARM_EABI_UNWINDER__ -// This is the primary exception class we report -- "GNUCC++\0". -const _Unwind_Exception_Class __gxx_primary_exception_class -= ((((((((_Unwind_Exception_Class) 'G' - << 8 | (_Unwind_Exception_Class) 'N') - << 8 | (_Unwind_Exception_Class) 'U') - << 8 | (_Unwind_Exception_Class) 'C') - << 8 | (_Unwind_Exception_Class) 'C') - << 8 | (_Unwind_Exception_Class) '+') - << 8 | (_Unwind_Exception_Class) '+') - << 8 | (_Unwind_Exception_Class) '\0'); - -// This is the dependent (from std::rethrow_exception) exception class we report -// "GNUCC++\x01" -const _Unwind_Exception_Class __gxx_dependent_exception_class -= ((((((((_Unwind_Exception_Class) 'G' - << 8 | (_Unwind_Exception_Class) 'N') - << 8 | (_Unwind_Exception_Class) 'U') - << 8 | (_Unwind_Exception_Class) 'C') - << 8 | (_Unwind_Exception_Class) 'C') - << 8 | (_Unwind_Exception_Class) '+') - << 8 | (_Unwind_Exception_Class) '+') - << 8 | (_Unwind_Exception_Class) '\x01'); - -static inline bool -__is_gxx_exception_class(_Unwind_Exception_Class c) -{ - return c == __gxx_primary_exception_class - || c == __gxx_dependent_exception_class; -} - -// Only checks for primary or dependent, but not that it is a C++ exception at -// all. -static inline bool -__is_dependent_exception(_Unwind_Exception_Class c) -{ - return (c & 1); -} - -#define __GXX_INIT_PRIMARY_EXCEPTION_CLASS(c) c = __gxx_primary_exception_class -#define __GXX_INIT_DEPENDENT_EXCEPTION_CLASS(c) \ - c = __gxx_dependent_exception_class - -// GNU C++ personality routine, Version 0. -extern "C" _Unwind_Reason_Code __gxx_personality_v0 - (int, _Unwind_Action, _Unwind_Exception_Class, - struct _Unwind_Exception *, struct _Unwind_Context *); - -// GNU C++ sjlj personality routine, Version 0. -extern "C" _Unwind_Reason_Code __gxx_personality_sj0 - (int, _Unwind_Action, _Unwind_Exception_Class, - struct _Unwind_Exception *, struct _Unwind_Context *); - -static inline void* -__gxx_caught_object(_Unwind_Exception* eo) -{ - // Bad as it looks, this actually works for dependent exceptions too. - __cxa_exception* header = __get_exception_header_from_ue (eo); - return header->adjustedPtr; -} -#endif // !__ARM_EABI_UNWINDER__ - -static inline void* -__get_object_from_ue(_Unwind_Exception* eo) throw() -{ - return __is_dependent_exception (eo->exception_class) ? - __get_dependent_exception_from_ue (eo)->primaryException : - eo + 1; -} - -static inline void * -__get_object_from_ambiguous_exception(__cxa_exception *p_or_d) throw() -{ - return __get_object_from_ue (&p_or_d->unwindHeader); -} - - -} /* namespace __cxxabiv1 */ - -#pragma GCC visibility pop - -#endif // _UNWIND_CXX_H |