--- /dev/null 2017-01-22 10:16:57.869617664 -0800 +++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot.amd64.test/src/org/graalvm/compiler/hotspot/amd64/test/DataPatchInConstantsTest.java 2017-02-15 16:58:55.402444771 -0800 @@ -0,0 +1,217 @@ +/* + * Copyright (c) 2014, 2015, 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.hotspot.amd64.test; + +import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG; +import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_2; +import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1; +import static jdk.vm.ci.code.ValueUtil.asRegister; + +import org.junit.Assume; +import org.junit.Before; +import org.junit.Test; + +import org.graalvm.compiler.asm.amd64.AMD64Address; +import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler; +import org.graalvm.compiler.graph.NodeClass; +import org.graalvm.compiler.hotspot.nodes.CompressionNode; +import org.graalvm.compiler.hotspot.nodes.type.NarrowOopStamp; +import org.graalvm.compiler.hotspot.test.HotSpotGraalCompilerTest; +import org.graalvm.compiler.lir.LIRInstruction; +import org.graalvm.compiler.lir.LIRInstructionClass; +import org.graalvm.compiler.lir.Variable; +import org.graalvm.compiler.lir.asm.CompilationResultBuilder; +import org.graalvm.compiler.lir.gen.LIRGeneratorTool; +import org.graalvm.compiler.nodeinfo.NodeInfo; +import org.graalvm.compiler.nodes.FixedWithNextNode; +import org.graalvm.compiler.nodes.ValueNode; +import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderConfiguration.Plugins; +import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext; +import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugin; +import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugins.Registration; +import org.graalvm.compiler.nodes.spi.LIRLowerable; +import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; + +import jdk.vm.ci.amd64.AMD64; +import jdk.vm.ci.meta.AllocatableValue; +import jdk.vm.ci.meta.Constant; +import jdk.vm.ci.meta.JavaKind; +import jdk.vm.ci.meta.ResolvedJavaMethod; + +public class DataPatchInConstantsTest extends HotSpotGraalCompilerTest { + + @Before + public void checkAMD64() { + Assume.assumeTrue("skipping AMD64 specific test", getTarget().arch instanceof AMD64); + } + + private static final Object object = new Object() { + + @Override + public String toString() { + return "testObject"; + } + }; + + private static Object loadThroughPatch(Object obj) { + return obj; + } + + public static Object oopSnippet() { + Object patch = loadThroughPatch(object); + if (object != patch) { + return "invalid patch"; + } + System.gc(); + patch = loadThroughPatch(object); + if (object != patch) { + return "failed after gc"; + } + return patch; + } + + @Test + public void oopTest() { + test("oopSnippet"); + } + + private static Object loadThroughCompressedPatch(Object obj) { + return obj; + } + + public static Object narrowOopSnippet() { + Object patch = loadThroughCompressedPatch(object); + if (object != patch) { + return "invalid patch"; + } + System.gc(); + patch = loadThroughCompressedPatch(object); + if (object != patch) { + return "failed after gc"; + } + return patch; + } + + @Test + public void narrowOopTest() { + Assume.assumeTrue("skipping narrow oop data patch test", runtime().getVMConfig().useCompressedOops); + test("narrowOopSnippet"); + } + + public static Object compareSnippet() { + Object uncompressed = loadThroughPatch(object); + Object compressed = loadThroughCompressedPatch(object); + if (object != uncompressed) { + return "uncompressed failed"; + } + if (object != compressed) { + return "compressed failed"; + } + if (uncompressed != compressed) { + return "uncompressed != compressed"; + } + return object; + } + + @Test + public void compareTest() { + Assume.assumeTrue("skipping narrow oop data patch test", runtime().getVMConfig().useCompressedOops); + test("compareSnippet"); + } + + @Override + protected Plugins getDefaultGraphBuilderPlugins() { + Plugins plugins = super.getDefaultGraphBuilderPlugins(); + Registration r = new Registration(plugins.getInvocationPlugins(), DataPatchInConstantsTest.class); + + r.register1("loadThroughPatch", Object.class, new InvocationPlugin() { + @Override + public boolean apply(GraphBuilderContext b, ResolvedJavaMethod targetMethod, Receiver receiver, ValueNode arg) { + b.addPush(JavaKind.Object, new LoadThroughPatchNode(arg)); + return true; + } + }); + + r.register1("loadThroughCompressedPatch", Object.class, new InvocationPlugin() { + @Override + public boolean apply(GraphBuilderContext b, ResolvedJavaMethod targetMethod, Receiver receiver, ValueNode arg) { + ValueNode compressed = b.add(CompressionNode.compress(arg, runtime().getVMConfig().getOopEncoding())); + ValueNode patch = b.add(new LoadThroughPatchNode(compressed)); + b.addPush(JavaKind.Object, CompressionNode.uncompress(patch, runtime().getVMConfig().getOopEncoding())); + return true; + } + }); + + return plugins; + } + + @NodeInfo(cycles = CYCLES_2, size = SIZE_1) + private static final class LoadThroughPatchNode extends FixedWithNextNode implements LIRLowerable { + public static final NodeClass TYPE = NodeClass.create(LoadThroughPatchNode.class); + + @Input protected ValueNode input; + + protected LoadThroughPatchNode(ValueNode input) { + super(TYPE, input.stamp()); + this.input = input; + } + + @Override + public void generate(NodeLIRBuilderTool generator) { + assert input.isConstant(); + + LIRGeneratorTool gen = generator.getLIRGeneratorTool(); + Variable ret = gen.newVariable(gen.getLIRKind(stamp())); + + gen.append(new LoadThroughPatchOp(input.asConstant(), stamp() instanceof NarrowOopStamp, ret)); + generator.setResult(this, ret); + } + } + + private static final class LoadThroughPatchOp extends LIRInstruction { + public static final LIRInstructionClass TYPE = LIRInstructionClass.create(LoadThroughPatchOp.class); + + final Constant c; + final boolean compressed; + @Def({REG}) AllocatableValue result; + + LoadThroughPatchOp(Constant c, boolean compressed, AllocatableValue result) { + super(TYPE); + this.c = c; + this.compressed = compressed; + this.result = result; + } + + @Override + public void emitCode(CompilationResultBuilder crb) { + AMD64Address address = (AMD64Address) crb.recordDataReferenceInCode(c, compressed ? 4 : 8); + AMD64MacroAssembler asm = (AMD64MacroAssembler) crb.asm; + if (compressed) { + asm.movl(asRegister(result), address); + } else { + asm.movq(asRegister(result), address); + } + } + } +}