diff options
Diffstat (limited to 'contrib/libc++/src/exception.cpp')
| -rw-r--r-- | contrib/libc++/src/exception.cpp | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/contrib/libc++/src/exception.cpp b/contrib/libc++/src/exception.cpp new file mode 100644 index 0000000..6b5e698 --- /dev/null +++ b/contrib/libc++/src/exception.cpp @@ -0,0 +1,217 @@ +//===------------------------ exception.cpp -------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +#include <stdlib.h> + +#include "exception" + +#if __APPLE__ + #include <cxxabi.h> + + using namespace __cxxabiv1; + #define HAVE_DEPENDENT_EH_ABI 1 + #ifndef _LIBCPPABI_VERSION + using namespace __cxxabiapple; + // On Darwin, there are two STL shared libraries and a lower level ABI + // shared libray. The globals holding the current terminate handler and + // current unexpected handler are in the ABI library. + #define __terminate_handler __cxxabiapple::__cxa_terminate_handler + #define __unexpected_handler __cxxabiapple::__cxa_unexpected_handler + #endif // _LIBCPPABI_VERSION +#elif defined(LIBCXXRT) + #include <cxxabi.h> + using namespace __cxxabiv1; + #define HAVE_DEPENDENT_EH_ABI 1 +#else // __APPLE__ + static std::terminate_handler __terminate_handler; + static std::unexpected_handler __unexpected_handler; +#endif // __APPLE__ + +namespace std +{ + +#if !defined(LIBCXXRT) && !defined(_LIBCPPABI_VERSION) + +// libcxxrt provides implementations of these functions itself. +unexpected_handler +set_unexpected(unexpected_handler func) _NOEXCEPT +{ + return __sync_lock_test_and_set(&__unexpected_handler, func); +} + +unexpected_handler +get_unexpected() _NOEXCEPT +{ + return __sync_fetch_and_add(&__unexpected_handler, (unexpected_handler)0); +} + +_ATTRIBUTE(noreturn) +void +unexpected() +{ + (*get_unexpected())(); + // unexpected handler should not return + terminate(); +} + +terminate_handler +set_terminate(terminate_handler func) _NOEXCEPT +{ + return __sync_lock_test_and_set(&__terminate_handler, func); +} + +terminate_handler +get_terminate() _NOEXCEPT +{ + return __sync_fetch_and_add(&__terminate_handler, (terminate_handler)0); +} + +_ATTRIBUTE(noreturn) +void +terminate() _NOEXCEPT +{ +#ifndef _LIBCPP_NO_EXCEPTIONS + try + { +#endif // _LIBCPP_NO_EXCEPTIONS + (*get_terminate())(); + // handler should not return + ::abort (); +#ifndef _LIBCPP_NO_EXCEPTIONS + } + catch (...) + { + // handler should not throw exception + ::abort (); + } +#endif // _LIBCPP_NO_EXCEPTIONS +} +#endif // !defined(LIBCXXRT) && !defined(_LIBCPPABI_VERSION) + +#ifndef LIBCXXRT +bool uncaught_exception() _NOEXCEPT +{ +#if __APPLE__ + // on Darwin, there is a helper function so __cxa_get_globals is private + return __cxa_uncaught_exception(); +#elif LIBCXXRT + __cxa_eh_globals * globals = __cxa_get_globals(); + return (globals->uncaughtExceptions != 0); +#else // __APPLE__ + #warning uncaught_exception not yet implemented + ::abort(); +#endif // __APPLE__ +} + +#ifndef _LIBCPPABI_VERSION + +exception::~exception() _NOEXCEPT +{ +} + +bad_exception::~bad_exception() _NOEXCEPT +{ +} + +const char* exception::what() const _NOEXCEPT +{ + return "std::exception"; +} + +const char* bad_exception::what() const _NOEXCEPT +{ + return "std::bad_exception"; +} + +#endif // _LIBCPPABI_VERSION +#endif //LIBCXXRT + +exception_ptr::~exception_ptr() _NOEXCEPT +{ +#if HAVE_DEPENDENT_EH_ABI + __cxa_decrement_exception_refcount(__ptr_); +#else + #warning exception_ptr not yet implemented + ::abort(); +#endif // __APPLE__ +} + +exception_ptr::exception_ptr(const exception_ptr& other) _NOEXCEPT + : __ptr_(other.__ptr_) +{ +#if HAVE_DEPENDENT_EH_ABI + __cxa_increment_exception_refcount(__ptr_); +#else + #warning exception_ptr not yet implemented + ::abort(); +#endif // __APPLE__ +} + +exception_ptr& exception_ptr::operator=(const exception_ptr& other) _NOEXCEPT +{ +#if HAVE_DEPENDENT_EH_ABI + if (__ptr_ != other.__ptr_) + { + __cxa_increment_exception_refcount(other.__ptr_); + __cxa_decrement_exception_refcount(__ptr_); + __ptr_ = other.__ptr_; + } + return *this; +#else // __APPLE__ + #warning exception_ptr not yet implemented + ::abort(); +#endif // __APPLE__ +} + +nested_exception::nested_exception() _NOEXCEPT + : __ptr_(current_exception()) +{ +} + +nested_exception::~nested_exception() _NOEXCEPT +{ +} + +_ATTRIBUTE(noreturn) +void +nested_exception::rethrow_nested() const +{ + if (__ptr_ == nullptr) + terminate(); + rethrow_exception(__ptr_); +} + + +exception_ptr current_exception() _NOEXCEPT +{ +#if HAVE_DEPENDENT_EH_ABI + // be nicer if there was a constructor that took a ptr, then + // this whole function would be just: + // return exception_ptr(__cxa_current_primary_exception()); + exception_ptr ptr; + ptr.__ptr_ = __cxa_current_primary_exception(); + return ptr; +#else // __APPLE__ + #warning exception_ptr not yet implemented + ::abort(); +#endif // __APPLE__ +} + +_ATTRIBUTE(noreturn) +void rethrow_exception(exception_ptr p) +{ +#if HAVE_DEPENDENT_EH_ABI + __cxa_rethrow_primary_exception(p.__ptr_); + // if p.__ptr_ is NULL, above returns so we terminate + terminate(); +#else // __APPLE__ + #warning exception_ptr not yet implemented + ::abort(); +#endif // __APPLE__ +} +} // std |
