128 lines
5.2 KiB
Java
128 lines
5.2 KiB
Java
/*
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* Copyright (c) 2022, 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.openjdk.bench.jdk.classfile;
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import java.io.IOException;
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import java.lang.constant.ClassDesc;
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import java.lang.constant.MethodTypeDesc;
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import java.net.URI;
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import java.nio.ByteBuffer;
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import java.nio.file.FileSystems;
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import java.nio.file.Files;
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import java.util.Iterator;
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import java.util.ArrayList;
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import java.util.List;
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import jdk.internal.classfile.Classfile;
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import jdk.internal.classfile.ClassReader;
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import jdk.internal.classfile.constantpool.ConstantPoolBuilder;
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import jdk.internal.classfile.impl.AbstractPseudoInstruction;
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import jdk.internal.classfile.impl.CodeImpl;
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import jdk.internal.classfile.impl.LabelContext;
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import jdk.internal.classfile.impl.ClassfileImpl;
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import jdk.internal.classfile.impl.SplitConstantPool;
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import jdk.internal.classfile.impl.StackMapGenerator;
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import org.openjdk.jmh.annotations.Benchmark;
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import org.openjdk.jmh.annotations.BenchmarkMode;
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import org.openjdk.jmh.annotations.Fork;
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import org.openjdk.jmh.annotations.Level;
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import org.openjdk.jmh.annotations.Measurement;
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import org.openjdk.jmh.annotations.Mode;
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import org.openjdk.jmh.annotations.Scope;
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import org.openjdk.jmh.annotations.Setup;
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import org.openjdk.jmh.annotations.State;
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import org.openjdk.jmh.annotations.Warmup;
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@BenchmarkMode(Mode.Throughput)
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@State(Scope.Benchmark)
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@Fork(value = 1, jvmArgsAppend = {
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"--add-exports", "java.base/jdk.internal.classfile=ALL-UNNAMED",
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"--add-exports", "java.base/jdk.internal.classfile.attribute=ALL-UNNAMED",
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"--add-exports", "java.base/jdk.internal.classfile.constantpool=ALL-UNNAMED",
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"--add-exports", "java.base/jdk.internal.classfile.instruction=ALL-UNNAMED",
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"--add-exports", "java.base/jdk.internal.classfile.components=ALL-UNNAMED",
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"--add-exports", "java.base/jdk.internal.classfile.impl=ALL-UNNAMED"})
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@Warmup(iterations = 2)
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@Measurement(iterations = 10)
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public class GenerateStackMaps {
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record GenData(LabelContext labelContext,
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ClassDesc thisClass,
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String methodName,
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MethodTypeDesc methodDesc,
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boolean isStatic,
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ByteBuffer bytecode,
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ConstantPoolBuilder constantPool,
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List<AbstractPseudoInstruction.ExceptionCatchImpl> handlers) {}
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List<GenData> data;
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Iterator<GenData> it;
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GenData d;
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Classfile cc;
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@Setup(Level.Trial)
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public void setup() throws IOException {
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cc = Classfile.of();
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data = new ArrayList<>();
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Files.walk(FileSystems.getFileSystem(URI.create("jrt:/")).getPath("modules/java.base/java")).forEach(p -> {
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if (Files.isRegularFile(p) && p.toString().endsWith(".class")) try {
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var clm = cc.parse(p);
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var thisCls = clm.thisClass().asSymbol();
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var cp = new SplitConstantPool((ClassReader)clm.constantPool());
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for (var m : clm.methods()) {
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m.code().ifPresent(com -> {
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var bb = ByteBuffer.wrap(((CodeImpl)com).contents());
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data.add(new GenData(
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(LabelContext)com,
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thisCls,
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m.methodName().stringValue(),
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m.methodTypeSymbol(),
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(m.flags().flagsMask() & Classfile.ACC_STATIC) != 0,
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bb.slice(8, bb.getInt(4)),
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cp,
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com.exceptionHandlers().stream().map(eh -> (AbstractPseudoInstruction.ExceptionCatchImpl)eh).toList()));
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});
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}
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} catch (IOException e) {
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throw new RuntimeException(e);
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}
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});
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}
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@Benchmark
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public void benchmark() {
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if (it == null || !it.hasNext())
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it = data.iterator();
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var d = it.next();
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new StackMapGenerator(
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d.labelContext(),
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d.thisClass(),
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d.methodName(),
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d.methodDesc(),
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d.isStatic(),
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d.bytecode().rewind(),
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(SplitConstantPool)d.constantPool(),
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(ClassfileImpl)cc,
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d.handlers());
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}
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}
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