| /* |
| * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| |
| package org.graalvm.compiler.core.test; |
| |
| import java.lang.reflect.Field; |
| |
| import org.graalvm.compiler.nodes.StructuredGraph; |
| import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions; |
| import org.graalvm.compiler.options.OptionValues; |
| import org.graalvm.compiler.phases.common.CanonicalizerPhase; |
| import org.graalvm.compiler.phases.tiers.PhaseContext; |
| import org.graalvm.compiler.virtual.phases.ea.PartialEscapePhase; |
| import org.junit.Test; |
| |
| import jdk.vm.ci.code.InstalledCode; |
| import jdk.vm.ci.meta.ResolvedJavaMethod; |
| |
| public class UnsafeVirtualizationTest extends GraalCompilerTest { |
| |
| public static class Base { |
| /* |
| * This padding ensure that the size of the Base class ends up as a multiple of 8, which |
| * makes the first field of the subclass 8-byte aligned. |
| */ |
| double padding; |
| } |
| |
| public static class A extends Base { |
| int f1; |
| int f2; |
| } |
| |
| private static final long AF1Offset; |
| private static final long AF2Offset; |
| static { |
| long o1 = -1; |
| long o2 = -1; |
| try { |
| Field f1 = A.class.getDeclaredField("f1"); |
| Field f2 = A.class.getDeclaredField("f2"); |
| o1 = UNSAFE.objectFieldOffset(f1); |
| o2 = UNSAFE.objectFieldOffset(f2); |
| } catch (NoSuchFieldException | SecurityException e) { |
| throw new AssertionError(e); |
| } |
| AF1Offset = o1; |
| AF2Offset = o2; |
| } |
| |
| public static int unsafeSnippet1(double i1) { |
| A a = new A(); |
| UNSAFE.putDouble(a, AF1Offset, i1); |
| return UNSAFE.getInt(a, AF1Offset) + UNSAFE.getInt(a, AF2Offset); |
| } |
| |
| public static long unsafeSnippet2a(int i1) { |
| A a = new A(); |
| UNSAFE.putDouble(a, AF1Offset, i1); |
| a.f1 = i1; |
| return UNSAFE.getLong(a, AF1Offset); |
| } |
| |
| public static long unsafeSnippet2b(int i1) { |
| A a = new A(); |
| UNSAFE.putDouble(a, AF1Offset, i1); |
| a.f2 = i1; |
| return UNSAFE.getLong(a, AF1Offset); |
| } |
| |
| public static long unsafeSnippet3a(int i1) { |
| A a = new A(); |
| UNSAFE.putDouble(a, AF1Offset, i1); |
| UNSAFE.putInt(a, AF1Offset, i1); |
| return UNSAFE.getLong(a, AF1Offset); |
| } |
| |
| public static long unsafeSnippet3b(int i1) { |
| A a = new A(); |
| UNSAFE.putDouble(a, AF1Offset, i1); |
| UNSAFE.putInt(a, AF2Offset, i1); |
| return UNSAFE.getLong(a, AF1Offset); |
| } |
| |
| public static int unsafeSnippet4(double i1) { |
| A a = new A(); |
| UNSAFE.putDouble(a, AF1Offset, i1); |
| UNSAFE.putDouble(a, AF1Offset, i1); |
| return UNSAFE.getInt(a, AF1Offset) + UNSAFE.getInt(a, AF2Offset); |
| } |
| |
| @Test |
| public void testUnsafePEA01() { |
| testPartialEscapeReadElimination("unsafeSnippet1", false, 1.0); |
| testPartialEscapeReadElimination("unsafeSnippet1", true, 1.0); |
| } |
| |
| @Test |
| public void testUnsafePEA02() { |
| testPartialEscapeReadElimination("unsafeSnippet2a", false, 1); |
| testPartialEscapeReadElimination("unsafeSnippet2a", true, 1); |
| |
| testPartialEscapeReadElimination("unsafeSnippet2b", false, 1); |
| testPartialEscapeReadElimination("unsafeSnippet2b", true, 1); |
| } |
| |
| @Test |
| public void testUnsafePEA03() { |
| testPartialEscapeReadElimination("unsafeSnippet3a", false, 1); |
| testPartialEscapeReadElimination("unsafeSnippet3a", true, 1); |
| |
| testPartialEscapeReadElimination("unsafeSnippet3b", false, 1); |
| testPartialEscapeReadElimination("unsafeSnippet3b", true, 1); |
| } |
| |
| @Test |
| public void testUnsafePEA04() { |
| testPartialEscapeReadElimination("unsafeSnippet4", false, 1.0); |
| testPartialEscapeReadElimination("unsafeSnippet4", true, 1.0); |
| } |
| |
| public void testPartialEscapeReadElimination(String snippet, boolean canonicalizeBefore, Object... args) { |
| assert AF1Offset % 8 == 0 : "First of the two int-fields must be 8-byte aligned"; |
| |
| ResolvedJavaMethod method = getResolvedJavaMethod(snippet); |
| StructuredGraph graph = parseEager(snippet, AllowAssumptions.NO); |
| OptionValues options = graph.getOptions(); |
| PhaseContext context = getDefaultHighTierContext(); |
| CanonicalizerPhase canonicalizer = new CanonicalizerPhase(); |
| if (canonicalizeBefore) { |
| canonicalizer.apply(graph, context); |
| } |
| Result r = executeExpected(method, null, args); |
| new PartialEscapePhase(true, true, canonicalizer, null, options).apply(graph, context); |
| try { |
| InstalledCode code = getCode(method, graph); |
| Object result = code.executeVarargs(args); |
| assertEquals(r, new Result(result, null)); |
| } catch (Throwable e) { |
| assertFalse(true, e.toString()); |
| } |
| } |
| } |