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/*
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* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.graalvm.compiler.core.test;
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import java.lang.reflect.Field;
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import org.graalvm.compiler.nodes.StructuredGraph;
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import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;
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import org.graalvm.compiler.options.OptionValues;
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import org.graalvm.compiler.phases.common.CanonicalizerPhase;
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import org.graalvm.compiler.phases.tiers.PhaseContext;
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import org.graalvm.compiler.virtual.phases.ea.PartialEscapePhase;
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import org.junit.Test;
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47798
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import jdk.vm.ci.code.InstalledCode;
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import jdk.vm.ci.meta.ResolvedJavaMethod;
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46344
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public class UnsafeVirtualizationTest extends GraalCompilerTest {
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public static class Base {
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/*
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* This padding ensure that the size of the Base class ends up as a multiple of 8, which
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* makes the first field of the subclass 8-byte aligned.
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*/
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double padding;
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}
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public static class A extends Base {
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int f1;
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int f2;
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}
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private static final long AF1Offset;
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private static final long AF2Offset;
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static {
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long o1 = -1;
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long o2 = -1;
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try {
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Field f1 = A.class.getDeclaredField("f1");
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Field f2 = A.class.getDeclaredField("f2");
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o1 = UNSAFE.objectFieldOffset(f1);
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o2 = UNSAFE.objectFieldOffset(f2);
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} catch (NoSuchFieldException | SecurityException e) {
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throw new AssertionError(e);
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}
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AF1Offset = o1;
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AF2Offset = o2;
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}
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public static int unsafeSnippet1(double i1) {
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A a = new A();
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UNSAFE.putDouble(a, AF1Offset, i1);
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return UNSAFE.getInt(a, AF1Offset) + UNSAFE.getInt(a, AF2Offset);
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}
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public static long unsafeSnippet2a(int i1) {
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A a = new A();
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UNSAFE.putDouble(a, AF1Offset, i1);
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a.f1 = i1;
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return UNSAFE.getLong(a, AF1Offset);
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}
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public static long unsafeSnippet2b(int i1) {
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A a = new A();
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UNSAFE.putDouble(a, AF1Offset, i1);
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a.f2 = i1;
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return UNSAFE.getLong(a, AF1Offset);
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}
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public static long unsafeSnippet3a(int i1) {
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A a = new A();
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UNSAFE.putDouble(a, AF1Offset, i1);
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UNSAFE.putInt(a, AF1Offset, i1);
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return UNSAFE.getLong(a, AF1Offset);
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}
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public static long unsafeSnippet3b(int i1) {
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A a = new A();
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UNSAFE.putDouble(a, AF1Offset, i1);
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UNSAFE.putInt(a, AF2Offset, i1);
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return UNSAFE.getLong(a, AF1Offset);
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}
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public static int unsafeSnippet4(double i1) {
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A a = new A();
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UNSAFE.putDouble(a, AF1Offset, i1);
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UNSAFE.putDouble(a, AF1Offset, i1);
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return UNSAFE.getInt(a, AF1Offset) + UNSAFE.getInt(a, AF2Offset);
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}
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@Test
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public void testUnsafePEA01() {
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testPartialEscapeReadElimination("unsafeSnippet1", false, 1.0);
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testPartialEscapeReadElimination("unsafeSnippet1", true, 1.0);
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}
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@Test
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public void testUnsafePEA02() {
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testPartialEscapeReadElimination("unsafeSnippet2a", false, 1);
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testPartialEscapeReadElimination("unsafeSnippet2a", true, 1);
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testPartialEscapeReadElimination("unsafeSnippet2b", false, 1);
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testPartialEscapeReadElimination("unsafeSnippet2b", true, 1);
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}
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@Test
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public void testUnsafePEA03() {
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testPartialEscapeReadElimination("unsafeSnippet3a", false, 1);
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testPartialEscapeReadElimination("unsafeSnippet3a", true, 1);
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testPartialEscapeReadElimination("unsafeSnippet3b", false, 1);
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testPartialEscapeReadElimination("unsafeSnippet3b", true, 1);
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}
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@Test
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public void testUnsafePEA04() {
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testPartialEscapeReadElimination("unsafeSnippet4", false, 1.0);
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testPartialEscapeReadElimination("unsafeSnippet4", true, 1.0);
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}
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public void testPartialEscapeReadElimination(String snippet, boolean canonicalizeBefore, Object... args) {
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assert AF1Offset % 8 == 0 : "First of the two int-fields must be 8-byte aligned";
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ResolvedJavaMethod method = getResolvedJavaMethod(snippet);
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StructuredGraph graph = parseEager(snippet, AllowAssumptions.NO);
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OptionValues options = graph.getOptions();
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PhaseContext context = getDefaultHighTierContext();
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CanonicalizerPhase canonicalizer = new CanonicalizerPhase();
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if (canonicalizeBefore) {
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canonicalizer.apply(graph, context);
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}
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Result r = executeExpected(method, null, args);
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new PartialEscapePhase(true, true, canonicalizer, null, options).apply(graph, context);
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try {
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InstalledCode code = getCode(method, graph);
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Object result = code.executeVarargs(args);
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assertEquals(r, new Result(result, null));
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} catch (Throwable e) {
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assertFalse(true, e.toString());
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}
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}
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}
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