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// Copyright 2015 The Bazel Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package test;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.jar.JarOutputStream;
import java.util.zip.ZipEntry;
public class GenSourceDebugExtension {
public static void main(String[] args) throws IOException {
try (JarOutputStream jos = new JarOutputStream(new FileOutputStream(args[0]))) {
jos.putNextEntry(new ZipEntry("sourcedebugextension/Test.class"));
jos.write(dump());
}
}
public static byte[] dump() {
ClassWriter cw = new ClassWriter(0);
MethodVisitor mv;
cw.visit(
52,
Opcodes.ACC_PUBLIC + Opcodes.ACC_SUPER,
"sourcedebugextension/Test",
null,
"java/lang/Object",
null);
// This is the important part for the test - it's an example SourceDebugExtension found
// in Clojure.
cw.visitSource(
"dispatch.clj",
"SMAP\ndispatch.java\nClojure\n*S Clojure\n*F\n+ 1 dispatch.clj\nclojure/pprint/dispatch.clj\n*L\n144#1,8:144\n*E");
{
mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitCode();
mv.visitVarInsn(Opcodes.ALOAD, 0);
mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
mv.visitInsn(Opcodes.RETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
}
{
mv = cw.visitMethod(
Opcodes.ACC_PUBLIC + Opcodes.ACC_STATIC,
"main",
"([Ljava/lang/String;)V",
null,
null);
mv.visitCode();
mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/System", "err", "Ljava/io/PrintStream;");
mv.visitLdcInsn("Hello");
mv.visitMethodInsn(
Opcodes.INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false);
mv.visitInsn(Opcodes.RETURN);
mv.visitMaxs(2, 1);
mv.visitEnd();
}
cw.visitEnd();
return cw.toByteArray();
}
}
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