--- /dev/null 2016-02-10 20:39:42.000000000 +0100 +++ new/src/share/vm/memory/operator_new.cpp 2016-02-10 20:39:42.000000000 +0100 @@ -0,0 +1,92 @@ +/* + * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code 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 + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + * + */ + +#include "precompiled.hpp" +#include "utilities/debug.hpp" + +#include + +//-------------------------------------------------------------------------------------- +// Non-product code + +#ifndef PRODUCT +// The global operator new should never be called since it will usually indicate +// a memory leak. Use CHeapObj as the base class of such objects to make it explicit +// that they're allocated on the C heap. +// Commented out in product version to avoid conflicts with third-party C++ native code. +// +// In C++98/03 the throwing new operators are defined with the following signature: +// +// void* operator new(std::size_tsize) throw(std::bad_alloc); +// void* operator new[](std::size_tsize) throw(std::bad_alloc); +// +// while all the other (non-throwing) new and delete operators are defined with an empty +// throw clause (i.e. "operator delete(void* p) throw()") which means that they do not +// throw any exceptions (see section 18.4 of the C++ standard). +// +// In the new C++11/14 standard, the signature of the throwing new operators was changed +// by completely omitting the throw clause (which effectively means they could throw any +// exception) while all the other new/delete operators where changed to have a 'nothrow' +// clause instead of an empty throw clause. +// +// Unfortunately, the support for exception specifications among C++ compilers is still +// very fragile. While some more strict compilers like AIX xlC or HP aCC reject to +// override the default throwing new operator with a user operator with an empty throw() +// clause, the MS Visual C++ compiler warns for every non-empty throw clause like +// throw(std::bad_alloc) that it will ignore the exception specification. The following +// operator definitions have been checked to correctly work with all currently supported +// compilers and they should be upwards compatible with C++11/14. Therefore +// PLEASE BE CAREFUL if you change the signature of the following operators! + +static void * zero = (void *) 0; + +void* operator new(size_t size) /* throw(std::bad_alloc) */ { + fatal("Should not call global operator new"); + return zero; +} + +void* operator new [](size_t size) /* throw(std::bad_alloc) */ { + fatal("Should not call global operator new[]"); + return zero; +} + +void* operator new(size_t size, const std::nothrow_t& nothrow_constant) throw() { + fatal("Should not call global operator new"); + return 0; +} + +void* operator new [](size_t size, std::nothrow_t& nothrow_constant) throw() { + fatal("Should not call global operator new[]"); + return 0; +} + +void operator delete(void* p) throw() { + fatal("Should not call global delete"); +} + +void operator delete [](void* p) throw() { + fatal("Should not call global delete []"); +} + +#endif // Non-product