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* Copyright (c) 2003, 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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#include "precompiled.hpp"
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#include "runtime/orderAccess.hpp"
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#include "runtime/stubRoutines.hpp"
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#include "runtime/javaThread.hpp"
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#include "runtime/threads.hpp"
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void OrderAccess::StubRoutines_fence() {
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// Use a stub if it exists. It may not exist during bootstrap so do
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// nothing in that case but assert if no fence code exists after threads have been created
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void (*func)() = CAST_TO_FN_PTR(void (*)(), StubRoutines::fence_entry());
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if (func != nullptr) {
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assert(Threads::number_of_threads() == 0, "for bootstrap only");
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void OrderAccess::cross_modify_fence_verify() {
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if (VerifyCrossModifyFence) {
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JavaThread::current()->set_requires_cross_modify_fence(false);