0,0 → 1,159 |
// -*- C++ -*- Manage the thread-local exception globals. |
// Copyright (C) 2001-2013 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/>. |
|
#include <bits/c++config.h> |
#include <exception> |
#include <cstdlib> |
#include "cxxabi.h" |
#include "unwind-cxx.h" |
#include "bits/gthr.h" |
|
#if _GLIBCXX_HOSTED |
using std::free; |
using std::malloc; |
#else |
// In a freestanding environment, these functions may not be |
// available -- but for now, we assume that they are. |
extern "C" void *malloc (std::size_t); |
extern "C" void free(void *); |
#endif |
|
using namespace __cxxabiv1; |
|
#if _GLIBCXX_HAVE_TLS |
|
namespace |
{ |
abi::__cxa_eh_globals* |
get_global() _GLIBCXX_NOTHROW |
{ |
static __thread abi::__cxa_eh_globals global; |
return &global; |
} |
} // anonymous namespace |
|
extern "C" __cxa_eh_globals* |
__cxxabiv1::__cxa_get_globals_fast() _GLIBCXX_NOTHROW |
{ return get_global(); } |
|
extern "C" __cxa_eh_globals* |
__cxxabiv1::__cxa_get_globals() _GLIBCXX_NOTHROW |
{ return get_global(); } |
|
|
#else |
|
// Single-threaded fallback buffer. |
static __cxa_eh_globals eh_globals; |
|
#if __GTHREADS |
|
static void |
eh_globals_dtor(void* ptr) |
{ |
if (ptr) |
{ |
__cxa_eh_globals* g = reinterpret_cast<__cxa_eh_globals*>(ptr); |
__cxa_exception* exn = g->caughtExceptions; |
__cxa_exception* next; |
while (exn) |
{ |
next = exn->nextException; |
_Unwind_DeleteException(&exn->unwindHeader); |
exn = next; |
} |
free(ptr); |
} |
} |
|
struct __eh_globals_init |
{ |
__gthread_key_t _M_key; |
bool _M_init; |
|
__eh_globals_init() : _M_init(false) |
{ |
if (__gthread_active_p()) |
_M_init = __gthread_key_create(&_M_key, eh_globals_dtor) == 0; |
} |
|
~__eh_globals_init() |
{ |
if (_M_init) |
__gthread_key_delete(_M_key); |
_M_init = false; |
} |
}; |
|
static __eh_globals_init init; |
|
extern "C" __cxa_eh_globals* |
__cxxabiv1::__cxa_get_globals_fast() _GLIBCXX_NOTHROW |
{ |
__cxa_eh_globals* g; |
if (init._M_init) |
g = static_cast<__cxa_eh_globals*>(__gthread_getspecific(init._M_key)); |
else |
g = &eh_globals; |
return g; |
} |
|
extern "C" __cxa_eh_globals* |
__cxxabiv1::__cxa_get_globals() _GLIBCXX_NOTHROW |
{ |
__cxa_eh_globals* g; |
if (init._M_init) |
{ |
g = static_cast<__cxa_eh_globals*>(__gthread_getspecific(init._M_key)); |
if (!g) |
{ |
void* v = malloc(sizeof(__cxa_eh_globals)); |
if (v == 0 || __gthread_setspecific(init._M_key, v) != 0) |
std::terminate(); |
g = static_cast<__cxa_eh_globals*>(v); |
g->caughtExceptions = 0; |
g->uncaughtExceptions = 0; |
#ifdef __ARM_EABI_UNWINDER__ |
g->propagatingExceptions = 0; |
#endif |
} |
} |
else |
g = &eh_globals; |
return g; |
} |
|
#else |
|
extern "C" __cxa_eh_globals* |
__cxxabiv1::__cxa_get_globals_fast() _GLIBCXX_NOTHROW |
{ return &eh_globals; } |
|
extern "C" __cxa_eh_globals* |
__cxxabiv1::__cxa_get_globals() _GLIBCXX_NOTHROW |
{ return &eh_globals; } |
|
#endif |
|
#endif |