diff options
Diffstat (limited to 'lib/libcxxabi/src/cxa_exception_storage.cpp')
-rw-r--r-- | lib/libcxxabi/src/cxa_exception_storage.cpp | 102 |
1 files changed, 0 insertions, 102 deletions
diff --git a/lib/libcxxabi/src/cxa_exception_storage.cpp b/lib/libcxxabi/src/cxa_exception_storage.cpp deleted file mode 100644 index c641e0225f8..00000000000 --- a/lib/libcxxabi/src/cxa_exception_storage.cpp +++ /dev/null @@ -1,102 +0,0 @@ -//===--------------------- cxa_exception_storage.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. -// -// -// This file implements the storage for the "Caught Exception Stack" -// http://mentorembedded.github.io/cxx-abi/abi-eh.html (section 2.2.2) -// -//===----------------------------------------------------------------------===// - -#include "cxa_exception.hpp" - -#include <__threading_support> - -#if defined(_LIBCXXABI_HAS_NO_THREADS) - -namespace __cxxabiv1 { -extern "C" { - static __cxa_eh_globals eh_globals; - __cxa_eh_globals *__cxa_get_globals() { return &eh_globals; } - __cxa_eh_globals *__cxa_get_globals_fast() { return &eh_globals; } - } -} - -#elif defined(HAS_THREAD_LOCAL) - -namespace __cxxabiv1 { - -namespace { - __cxa_eh_globals * __globals () { - static thread_local __cxa_eh_globals eh_globals; - return &eh_globals; - } - } - -extern "C" { - __cxa_eh_globals * __cxa_get_globals () { return __globals (); } - __cxa_eh_globals * __cxa_get_globals_fast () { return __globals (); } - } -} - -#else - -#include "abort_message.h" -#include "fallback_malloc.h" - -// In general, we treat all threading errors as fatal. -// We cannot call std::terminate() because that will in turn -// call __cxa_get_globals() and cause infinite recursion. - -namespace __cxxabiv1 { -namespace { - std::__libcpp_tls_key key_; - std::__libcpp_exec_once_flag flag_ = _LIBCPP_EXEC_ONCE_INITIALIZER; - - void _LIBCPP_TLS_DESTRUCTOR_CC destruct_ (void *p) { - __free_with_fallback ( p ); - if ( 0 != std::__libcpp_tls_set ( key_, NULL ) ) - abort_message("cannot zero out thread value for __cxa_get_globals()"); - } - - void construct_ () { - if ( 0 != std::__libcpp_tls_create ( &key_, destruct_ ) ) - abort_message("cannot create thread specific key for __cxa_get_globals()"); - } -} - -extern "C" { - __cxa_eh_globals * __cxa_get_globals () { - // Try to get the globals for this thread - __cxa_eh_globals* retVal = __cxa_get_globals_fast (); - - // If this is the first time we've been asked for these globals, create them - if ( NULL == retVal ) { - retVal = static_cast<__cxa_eh_globals*> - (__calloc_with_fallback (1, sizeof (__cxa_eh_globals))); - if ( NULL == retVal ) - abort_message("cannot allocate __cxa_eh_globals"); - if ( 0 != std::__libcpp_tls_set ( key_, retVal ) ) - abort_message("std::__libcpp_tls_set failure in __cxa_get_globals()"); - } - return retVal; - } - - // Note that this implementation will reliably return NULL if not - // preceded by a call to __cxa_get_globals(). This is an extension - // to the Itanium ABI and is taken advantage of in several places in - // libc++abi. - __cxa_eh_globals * __cxa_get_globals_fast () { - // First time through, create the key. - if (0 != std::__libcpp_execute_once(&flag_, construct_)) - abort_message("execute once failure in __cxa_get_globals_fast()"); -// static int init = construct_(); - return static_cast<__cxa_eh_globals*>(std::__libcpp_tls_get(key_)); - } - -} -} -#endif |