1 /* 2 * Copyright (c) 2016, 2016, 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 package org.graalvm.compiler.api.directives.test; 24 25 import java.io.IOException; 26 27 import org.junit.Assert; 28 import org.junit.Test; 29 30 import org.graalvm.compiler.api.directives.GraalDirectives; 31 import org.graalvm.compiler.core.common.GraalOptions; 32 import org.graalvm.compiler.core.test.GraalCompilerTest; 33 import org.graalvm.compiler.options.OptionValue; 34 import org.graalvm.compiler.options.OptionValue.OverrideScope; 35 36 import jdk.internal.org.objectweb.asm.Opcodes; 37 import jdk.vm.ci.code.InstalledCode; 38 import jdk.vm.ci.hotspot.HotSpotResolvedJavaMethod; 39 import jdk.vm.ci.meta.ResolvedJavaMethod; 40 41 @SuppressWarnings("try") 42 public class LockInstrumentationTest extends GraalCompilerTest { 43 44 private TinyInstrumentor instrumentor; 45 46 public LockInstrumentationTest() { 47 HotSpotResolvedJavaMethod method = (HotSpotResolvedJavaMethod) getResolvedJavaMethod(ClassA.class, "notInlinedMethod"); 48 method.setNotInlineable(); 49 50 try { 51 instrumentor = new TinyInstrumentor(LockInstrumentationTest.class, "instrumentation"); 52 } catch (IOException e) { 53 Assert.fail("unable to initialize the instrumentor: " + e); 54 } 55 } 56 57 public static class ClassA { 58 59 // This method should be marked as not inlineable 60 public void notInlinedMethod() { 61 } 62 63 } 64 65 public static final Object lock = new Object(); 66 public static boolean lockAfterCheckPoint; 67 public static boolean checkpoint; 68 69 private static void resetFlags() { 70 lockAfterCheckPoint = false; 71 checkpoint = false; 72 } 73 74 static void instrumentation() { 75 GraalDirectives.instrumentationBeginForPredecessor(); 76 lockAfterCheckPoint = checkpoint; 77 GraalDirectives.instrumentationEnd(); 78 } 79 80 public static void lockSnippet() { 81 synchronized (lock) { 82 checkpoint = true; 83 ClassA a = new ClassA(); 84 a.notInlinedMethod(); 85 } 86 } 87 88 @Test 89 public void testLock() { 90 try (OverrideScope s = OptionValue.override(GraalOptions.UseGraalInstrumentation, true)) { 91 Class<?> clazz = instrumentor.instrument(LockInstrumentationTest.class, "lockSnippet", Opcodes.MONITORENTER); 92 ResolvedJavaMethod method = getResolvedJavaMethod(clazz, "lockSnippet"); 93 executeExpected(method, null); // ensure the method is fully resolved 94 resetFlags(); 95 // The monitorenter anchors. We expect the instrumentation set the flag before passing 96 // the checkpoint. 97 InstalledCode code = getCode(method); 98 code.executeVarargs(); 99 Assert.assertFalse("expected lock was performed before checkpoint", lockAfterCheckPoint); 100 } catch (Throwable e) { 101 throw new AssertionError(e); 102 } 103 } 104 105 public static void postponeLockSnippet() { 106 ClassA a = new ClassA(); 107 108 synchronized (a) { 109 checkpoint = true; 110 a.notInlinedMethod(); 111 } 112 113 } 114 115 @Test 116 public void testNonEscapeLock() { 117 try (OverrideScope s = OptionValue.override(GraalOptions.UseGraalInstrumentation, true)) { 118 Class<?> clazz = instrumentor.instrument(LockInstrumentationTest.class, "postponeLockSnippet", Opcodes.MONITORENTER); 119 ResolvedJavaMethod method = getResolvedJavaMethod(clazz, "postponeLockSnippet"); 120 executeExpected(method, null); // ensure the method is fully resolved 121 resetFlags(); 122 // The lock in the snippet will be relocated before the invocation to 123 // notInlinedMethod(), i.e., after the checkpoint. We expect the instrumentation follows 124 // and flag will be set to true. 125 InstalledCode code = getCode(method); 126 code.executeVarargs(); 127 Assert.assertTrue("expected lock was performed after checkpoint", lockAfterCheckPoint); 128 } catch (Throwable e) { 129 throw new AssertionError(e); 130 } 131 } 132 133 }