| // -*- C++ -*- Manage the thread-local exception globals. |
| // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 |
| // 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) |
| // 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. |
| // |
| // 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. |
| |
| #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() throw() |
| { |
| static __thread abi::__cxa_eh_globals global; |
| return &global; |
| } |
| } // anonymous namespace |
| |
| extern "C" __cxa_eh_globals* |
| __cxxabiv1::__cxa_get_globals_fast() throw() |
| { return get_global(); } |
| |
| extern "C" __cxa_eh_globals* |
| __cxxabiv1::__cxa_get_globals() throw() |
| { 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() throw() |
| { |
| __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() throw() |
| { |
| __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; |
| } |
| } |
| else |
| g = &eh_globals; |
| return g; |
| } |
| |
| #else |
| |
| extern "C" __cxa_eh_globals* |
| __cxxabiv1::__cxa_get_globals_fast() throw() |
| { return &eh_globals; } |
| |
| extern "C" __cxa_eh_globals* |
| __cxxabiv1::__cxa_get_globals() throw() |
| { return &eh_globals; } |
| |
| #endif |
| |
| #endif |