94 lines
3.1 KiB
Java
94 lines
3.1 KiB
Java
/*
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* Copyright (c) 2015, 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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*
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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. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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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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*
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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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*
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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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* questions.
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*/
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/*
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* @test TestStableMemoryBarrier
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* @bug 8139758
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* @summary tests memory barrier correctly inserted for stable fields
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* @library /testlibrary /test/lib
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*
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* @run main/bootclasspath -Xcomp -XX:CompileOnly=::testCompile
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* java.lang.invoke.TestStableMemoryBarrier
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*
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* @author hui.shi@linaro.org
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*/
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package java.lang.invoke;
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import jdk.internal.vm.annotation.Stable;
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import java.lang.reflect.InvocationTargetException;
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public class TestStableMemoryBarrier {
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public static void main(String[] args) throws Exception {
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run(NotDominate.class);
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}
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/* ====================================================
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* Stable field initialized in method, but its allocation
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* doesn't dominate MemBar Release at the end of method.
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*/
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static class NotDominate{
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public @Stable int v;
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public static int[] array = new int[100];
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public static NotDominate testCompile(int n) {
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if ((n % 2) == 0) return null;
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// add a loop here, trigger PhaseIdealLoop::verify_dominance
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for (int i = 0; i < 100; i++) {
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array[i] = n;
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}
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NotDominate nm = new NotDominate();
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nm.v = n;
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return nm;
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}
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public static void test() throws Exception {
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for (int i = 0; i < 1000000; i++)
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testCompile(i);
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}
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}
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public static void run(Class<?> test) {
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Throwable ex = null;
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System.out.print(test.getName()+": ");
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try {
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test.getMethod("test").invoke(null);
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} catch (InvocationTargetException e) {
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ex = e.getCause();
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} catch (Throwable e) {
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ex = e;
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} finally {
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if (ex == null) {
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System.out.println("PASSED");
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} else {
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System.out.println("FAILED");
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ex.printStackTrace(System.out);
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}
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}
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}
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}
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