1 /* 2 * Copyright (c) 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.core.test; 24 25 import java.lang.reflect.Field; 26 27 import org.graalvm.compiler.nodes.StructuredGraph; 28 import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions; 29 import org.graalvm.compiler.options.OptionValues; 30 import org.graalvm.compiler.phases.common.CanonicalizerPhase; 31 import org.graalvm.compiler.phases.tiers.PhaseContext; 32 import org.graalvm.compiler.virtual.phases.ea.PartialEscapePhase; 33 import org.junit.Test; 34 35 public class UnsafeVirtualizationTest extends GraalCompilerTest { 36 37 public static class A { 38 int f1; 39 int f2; 40 } 41 42 private static final long AF1Offset; 43 private static final long AF2Offset; 44 static { 45 long o1 = -1; 46 long o2 = -1; 47 try { 48 Field f1 = A.class.getDeclaredField("f1"); 49 Field f2 = A.class.getDeclaredField("f2"); 50 o1 = UNSAFE.objectFieldOffset(f1); 51 o2 = UNSAFE.objectFieldOffset(f2); 52 } catch (NoSuchFieldException | SecurityException e) { 53 throw new AssertionError(e); 54 } 55 AF1Offset = o1; 56 AF2Offset = o2; 57 } 58 59 public static int unsafeSnippet0(int i1, int i2) { 60 A a = new A(); 61 UNSAFE.putDouble(a, AF1Offset, i1 + i2); 62 return UNSAFE.getInt(a, AF1Offset) + UNSAFE.getInt(a, AF2Offset); 63 } 64 65 public static int unsafeSnippet1(int i1, int i2) { 66 A a = new A(); 67 UNSAFE.putDouble(a, AF1Offset, i1 + i2); 68 a.f2 = i1; 69 return (int) UNSAFE.getDouble(a, AF1Offset); 70 } 71 72 @Test 73 public void testUnsafePEA01() { 74 testPartialEscapeReadElimination(parseEager("unsafeSnippet0", AllowAssumptions.NO), false); 75 testPartialEscapeReadElimination(parseEager("unsafeSnippet0", AllowAssumptions.NO), true); 76 } 77 78 @Test 79 public void testUnsafePEA02() { 80 testPartialEscapeReadElimination(parseEager("unsafeSnippet1", AllowAssumptions.NO), false); 81 testPartialEscapeReadElimination(parseEager("unsafeSnippet1", AllowAssumptions.NO), true); 82 } 83 84 public void testPartialEscapeReadElimination(StructuredGraph graph, boolean canonicalizeBefore) { 85 OptionValues options = graph.getOptions(); 86 PhaseContext context = getDefaultHighTierContext(); 87 CanonicalizerPhase canonicalizer = new CanonicalizerPhase(); 88 if (canonicalizeBefore) { 89 canonicalizer.apply(graph, context); 90 } 91 new PartialEscapePhase(true, true, canonicalizer, null, options).apply(graph, context); 92 } 93 94 }