1 /* 2 * Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 25 package org.graalvm.compiler.core.test.deopt; 26 27 import org.graalvm.compiler.core.test.GraalCompilerTest; 28 import org.graalvm.compiler.core.test.ea.EATestBase.TestClassObject; 29 import org.graalvm.compiler.serviceprovider.JavaVersionUtil; 30 import org.junit.Assume; 31 import org.junit.Test; 32 33 /** 34 * In the following tests, we try to deoptimize out of synchronized methods. 35 */ 36 public class SynchronizedMethodDeoptimizationTest extends GraalCompilerTest { 37 38 public static final TestClassObject testObject = null; 39 40 public static synchronized Object testMethodSynchronized(Object o) { 41 if (o == null) { 42 // this branch will always deoptimize 43 return testObject.x; 44 } 45 return o; 46 } 47 48 @Test 49 public void test1() { 50 // https://bugs.openjdk.java.net/browse/JDK-8182755 51 Assume.assumeTrue(JavaVersionUtil.JAVA_SPEC <= 8); 52 53 test("testMethodSynchronized", "test"); 54 test("testMethodSynchronized", (Object) null); 55 } 56 }