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// Copyright (c) 2017, the R8 project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
package com.android.tools.r8.jar;
import static org.objectweb.asm.Opcodes.ACC_SUPER;
import com.android.tools.r8.OutputSink;
import com.android.tools.r8.errors.Unimplemented;
import com.android.tools.r8.graph.DexAccessFlags;
import com.android.tools.r8.graph.DexApplication;
import com.android.tools.r8.graph.DexEncodedMethod;
import com.android.tools.r8.graph.DexProgramClass;
import com.android.tools.r8.graph.DexType;
import com.android.tools.r8.utils.InternalOptions;
import java.io.IOException;
import java.util.Collections;
import java.util.concurrent.ExecutorService;
import jdk.internal.org.objectweb.asm.Type;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.MethodVisitor;
public class CfApplicationWriter {
private final DexApplication application;
private final InternalOptions options;
public CfApplicationWriter(DexApplication application, InternalOptions options) {
this.application = application;
this.options = options;
}
public void write(OutputSink outputSink, ExecutorService executor) throws IOException {
application.timing.begin("CfApplicationWriter.write");
try {
writeApplication(outputSink, executor);
} finally {
application.timing.end();
}
}
private void writeApplication(OutputSink outputSink, ExecutorService executor)
throws IOException {
for (DexProgramClass clazz : application.classes()) {
if (clazz.getSynthesizedFrom().isEmpty()) {
writeClass(clazz, outputSink);
} else {
throw new Unimplemented("No support for synthetics in the Java bytecode backend.");
}
}
}
private void writeClass(DexProgramClass clazz, OutputSink outputSink) throws IOException {
ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
writer.visitSource(clazz.sourceFile.toString(), null);
int version = clazz.getClassFileVersion();
int access = classAndInterfaceAccessFlags(clazz.accessFlags);
String desc = clazz.type.toDescriptorString();
String name = internalName(clazz.type);
String signature = null; // TODO(zerny): Support generic signatures.
String superName =
clazz.type == options.itemFactory.objectType ? null : internalName(clazz.superType);
String[] interfaces = new String[clazz.interfaces.values.length];
for (int i = 0; i < clazz.interfaces.values.length; i++) {
interfaces[i] = internalName(clazz.interfaces.values[i]);
}
writer.visit(version, access, name, signature, superName, interfaces);
// TODO(zerny): Methods and fields.
for (DexEncodedMethod method : clazz.directMethods()) {
writeMethod(method, writer);
}
outputSink.writeClassFile(writer.toByteArray(), Collections.singleton(desc), desc);
}
private void writeMethod(DexEncodedMethod method, ClassWriter writer) {
int access = method.accessFlags.get();
String name = method.method.name.toString();
String desc = method.descriptor();
String signature = null; // TODO(zerny): Support generic signatures.
String[] exceptions = null;
MethodVisitor visitor = writer.visitMethod(access, name, desc, signature, exceptions);
method.getCode().asJarCode().writeTo(visitor);
}
private static int classAndInterfaceAccessFlags(DexAccessFlags accessFlags) {
// TODO(zerny): Refactor access flags to account for the union of both DEX and Java flags.
int access = accessFlags.get();
access |= ACC_SUPER;
return access;
}
private static String internalName(DexType type) {
return Type.getType(type.toDescriptorString()).getInternalName();
}
}
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