1 /* 2 * Copyright (c) 2011, 2017, 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.replacements.test; 24 25 import org.graalvm.compiler.api.directives.GraalDirectives; 26 import org.graalvm.compiler.core.test.GraalCompilerTest; 27 import org.junit.Test; 28 29 import jdk.vm.ci.code.InstalledCode; 30 import jdk.vm.ci.meta.ResolvedJavaMethod; 31 32 /** 33 * Tests that deoptimization upon volatile read will not roll back the read. The test cases rely on 34 * the fact that invocations to {@link GraalDirectives} utilities are substituted and not valid 35 * targets for deoptimization. 36 */ 37 public class DeoptimizeOnVolatileReadTest extends GraalCompilerTest { 38 39 static class Dummy { 40 boolean f1 = false; 41 volatile boolean f2 = false; 42 } 43 44 public static int test1Snippet(Dummy dummy) { 45 if (GraalDirectives.injectBranchProbability(0, GraalDirectives.inCompiledCode() & dummy.f1)) { 46 return 1; 47 } 48 49 return 0; 50 } 51 52 @Test 53 public void test1() { 54 ResolvedJavaMethod method = getResolvedJavaMethod("test1Snippet"); 55 56 Dummy dummy = new Dummy(); 57 Result expected = executeExpected(method, null, dummy); 58 assertEquals(new Result(0, null), expected); 59 60 dummy.f1 = true; 61 62 InstalledCode code = getCode(method); 63 Result actual; 64 65 try { 66 actual = new Result(code.executeVarargs(dummy), null); 67 } catch (Exception e) { 68 actual = new Result(null, e); 69 } 70 71 // The code should get deoptimized, and resume execution at the beginning of the method. 72 // Therefore it does not re-enter the branch as inCompiledCode() is false. 73 assertEquals(new Result(0, null), actual); 74 assertFalse(code.isValid()); 75 } 76 77 public static int test2Snippet(Dummy dummy) { 78 if (GraalDirectives.injectBranchProbability(0, GraalDirectives.inCompiledCode() & dummy.f2)) { 79 return 1; 80 } 81 82 return 0; 83 } 84 85 @Test 86 public void test2() { 87 ResolvedJavaMethod method = getResolvedJavaMethod("test2Snippet"); 88 89 Dummy dummy = new Dummy(); 90 Result expected = executeExpected(method, null, dummy); 91 assertEquals(new Result(0, null), expected); 92 93 dummy.f2 = true; 94 95 InstalledCode code = getCode(method); 96 Result actual; 97 98 try { 99 actual = new Result(code.executeVarargs(dummy), null); 100 } catch (Exception e) { 101 actual = new Result(null, e); 102 } 103 104 // The code should get deoptimized, and resume execution at the then-branch. 105 assertEquals(new Result(1, null), actual); 106 assertFalse(code.isValid()); 107 } 108 109 }