src/test/java/com/android/tools/r8/desugar/nestaccesscontrol/NestAttributesInDexShrinkingTest.java - r8 - Git at Google

 // Copyright (c) 2022, 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.desugar.nestaccesscontrol;

 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assume.assumeTrue;

 import com.android.tools.r8.TestParameters;
 import com.android.tools.r8.utils.AndroidApiLevel;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
 import com.android.tools.r8.utils.codeinspector.TypeSubject;
 import com.google.common.collect.ImmutableList;
 import java.util.List;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
 import org.junit.runners.Parameterized.Parameter;
 import org.junit.runners.Parameterized.Parameters;
 import org.objectweb.asm.ClassWriter;
 import org.objectweb.asm.Label;
 import org.objectweb.asm.MethodVisitor;
 import org.objectweb.asm.Opcodes;

 @RunWith(Parameterized.class)
 public class NestAttributesInDexShrinkingTest extends NestAttributesInDexTestBase
     implements Opcodes {

   @Parameter() public TestParameters parameters;

   @Parameters(name = "{0}")
   public static List<Object[]> data() {
     return buildParameters(
         getTestParameters().withAllRuntimes().withAllApiLevelsAlsoForCf().build());
   }

   private static final String EXPECTED_OUTPUT = StringUtils.lines("Hello, world!");

   @Test
   public void testRuntime() throws Exception {
     assumeTrue(
         parameters.isCfRuntime()
             && isRuntimeWithNestSupport(parameters.asCfRuntime())
             && parameters.getApiLevel().isEqualTo(AndroidApiLevel.B));
     testForJvm()
         .addProgramClassFileData(
             dumpHost(ACC_PRIVATE), dumpMember1(ACC_PRIVATE), dumpMember2(ACC_PRIVATE))
         .run(parameters.getRuntime(), "Host")
         .assertSuccessWithOutput(EXPECTED_OUTPUT);
   }

   private void inspect(CodeInspector inspector, boolean expectNestAttributes) {
     ClassSubject host = inspector.clazz("Host");
     ClassSubject member1 = inspector.clazz("Host$Member1");
     ClassSubject member2 = inspector.clazz("Host$Member2");
     if (expectNestAttributes) {
       assertEquals(
           ImmutableList.of(member2.asTypeSubject(), member1.asTypeSubject()),
           host.getFinalNestMembersAttribute());
     } else {
       assertEquals(0, host.getFinalNestMembersAttribute().size());
     }
     TypeSubject expectedNestHostAttribute = expectNestAttributes ? host.asTypeSubject() : null;
     assertEquals(expectedNestHostAttribute, member1.getFinalNestHostAttribute());
     assertEquals(expectedNestHostAttribute, member2.getFinalNestHostAttribute());
   }

   private void expectNestAttributes(CodeInspector inspector) {
     if (parameters.isCfRuntime()) {
       inspect(inspector, true);
     } else {
       // TODO(b/236125275): DEX should also have the nest attributes.
       expectNoNestAttributes(inspector);
     }
   }

   private void expectNoNestAttributes(CodeInspector inspector) {
     inspect(inspector, false);
   }

   @Test
   public void testR8() throws Exception {
     assumeTrue(parameters.isDexRuntime() || isRuntimeWithNestSupport(parameters.asCfRuntime()));
     // TODO(b/247047415): Update test when a DEX VM natively supporting nests is added.
     assertFalse(parameters.getApiLevel().getLevel() > 33);
     testForR8(parameters.getBackend())
         .addProgramClassFileData(
             dumpHost(ACC_PRIVATE), dumpMember1(ACC_PRIVATE), dumpMember2(ACC_PRIVATE))
         .addKeepMainRule("Host")
         .setMinApi(parameters.getApiLevel())
         .addOptionsModification(options -> options.emitNestAnnotationsInDex = true)
         .compile()
         .inspect(inspector -> assertEquals(1, inspector.allClasses().size()))
         .run(parameters.getRuntime(), "Host")
         .assertSuccessWithOutput(EXPECTED_OUTPUT);
   }

   @Test
   public void testR8KeepHostWithPrivateMembers() throws Exception {
     assumeTrue(parameters.isDexRuntime() || isRuntimeWithNestSupport(parameters.asCfRuntime()));
     // TODO(b/247047415): Update test when a DEX VM natively supporting nests is added.
     assertFalse(parameters.getApiLevel().getLevel() > 33);
     testForR8(parameters.getBackend())
         .addProgramClassFileData(
             dumpHost(ACC_PRIVATE), dumpMember1(ACC_PRIVATE), dumpMember2(ACC_PRIVATE))
         .setMinApi(parameters.getApiLevel())
         .addOptionsModification(options -> options.emitNestAnnotationsInDex = true)
         .addKeepMainRule("Host")
         .addKeepClassAndMembersRules("Host", "Host$Member1", "Host$Member2")
         .compile()
         .inspect(this::expectNestAttributes)
         .run(parameters.getRuntime(), "Host")
         .applyIf(
             parameters.isCfRuntime(),
             r -> r.assertSuccessWithOutput(EXPECTED_OUTPUT),
             r -> r.assertFailureWithErrorThatThrows(IllegalAccessError.class));
   }

   @Test
   public void testR8KeepHostWithPublicMembers() throws Exception {
     assumeTrue(parameters.isDexRuntime() || isRuntimeWithNestSupport(parameters.asCfRuntime()));
     // TODO(b/247047415): Update test when a DEX VM natively supporting nests is added.
     assertFalse(parameters.getApiLevel().getLevel() > 33);
     testForR8(parameters.getBackend())
         .addProgramClassFileData(
             dumpHost(ACC_PUBLIC), dumpMember1(ACC_PUBLIC), dumpMember2(ACC_PUBLIC))
         .setMinApi(parameters.getApiLevel())
         .addOptionsModification(options -> options.emitNestAnnotationsInDex = true)
         .addKeepMainRule("Host")
         .addKeepClassAndMembersRules("Host", "Host$Member1", "Host$Member2")
         .compile()
         .inspect(this::expectNoNestAttributes)
         .run(parameters.getRuntime(), "Host")
         .assertSuccessWithOutput(EXPECTED_OUTPUT);
   }

   /*
     Dump of:

     public class Host {
       public static void main(String[] args) {
         new Host().h1();
         System.out.println();
       }

       static class Member1 {
         private void m(Host host) {  // private or public
           host.h2("Hello");
         }
       }

       static class Member2 {
         private void m(Host host) {  // private or public
           host.h2(", world!");
         }
       }

       private void h1() {  // private or public
         new Member1().m(this);
         new Member2().m(this);
       }

       private void h2(String message) {  // private or public
         System.out.print(message);
       }
     }

     compiled with `-target 11`. Not a transformer here, as transforming the javac post nest
     access methods is not feasible.
   */

   public static byte[] dumpHost(int methodAccess) throws Exception {
     assert methodAccess == ACC_PUBLIC || methodAccess == ACC_PRIVATE;

     ClassWriter classWriter = new ClassWriter(0);
     MethodVisitor methodVisitor;

     classWriter.visit(V11, ACC_PUBLIC | ACC_SUPER, "Host", null, "java/lang/Object", null);
     classWriter.visitSource("Host.java", null);
     classWriter.visitNestMember("Host$Member2");
     classWriter.visitNestMember("Host$Member1");
     classWriter.visitInnerClass("Host$Member2", "Host", "Member2", ACC_STATIC);
     classWriter.visitInnerClass("Host$Member1", "Host", "Member1", ACC_STATIC);
     {
       methodVisitor = classWriter.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
       methodVisitor.visitCode();
       Label label0 = new Label();
       methodVisitor.visitLabel(label0);
       methodVisitor.visitLineNumber(1, label0);
       methodVisitor.visitVarInsn(ALOAD, 0);
       methodVisitor.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
       methodVisitor.visitInsn(RETURN);
       methodVisitor.visitMaxs(1, 1);
       methodVisitor.visitEnd();
     }
     {
       methodVisitor =
           classWriter.visitMethod(
               ACC_PUBLIC | ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null);
       methodVisitor.visitCode();
       Label label0 = new Label();
       methodVisitor.visitLabel(label0);
       methodVisitor.visitLineNumber(3, label0);
       methodVisitor.visitTypeInsn(NEW, "Host");
       methodVisitor.visitInsn(DUP);
       methodVisitor.visitMethodInsn(INVOKESPECIAL, "Host", "<init>", "()V", false);
       methodVisitor.visitMethodInsn(INVOKEVIRTUAL, "Host", "h1", "()V", false);
       Label label1 = new Label();
       methodVisitor.visitLabel(label1);
       methodVisitor.visitLineNumber(4, label1);
       methodVisitor.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
       methodVisitor.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "()V", false);
       Label label2 = new Label();
       methodVisitor.visitLabel(label2);
       methodVisitor.visitLineNumber(5, label2);
       methodVisitor.visitInsn(RETURN);
       methodVisitor.visitMaxs(2, 1);
       methodVisitor.visitEnd();
     }
     {
       methodVisitor = classWriter.visitMethod(methodAccess, "h1", "()V", null, null);
       methodVisitor.visitCode();
       Label label0 = new Label();
       methodVisitor.visitLabel(label0);
       methodVisitor.visitLineNumber(18, label0);
       methodVisitor.visitTypeInsn(NEW, "Host$Member1");
       methodVisitor.visitInsn(DUP);
       methodVisitor.visitMethodInsn(INVOKESPECIAL, "Host$Member1", "<init>", "()V", false);
       methodVisitor.visitVarInsn(ALOAD, 0);
       methodVisitor.visitMethodInsn(INVOKEVIRTUAL, "Host$Member1", "m", "(LHost;)V", false);
       Label label1 = new Label();
       methodVisitor.visitLabel(label1);
       methodVisitor.visitLineNumber(19, label1);
       methodVisitor.visitTypeInsn(NEW, "Host$Member2");
       methodVisitor.visitInsn(DUP);
       methodVisitor.visitMethodInsn(INVOKESPECIAL, "Host$Member2", "<init>", "()V", false);
       methodVisitor.visitVarInsn(ALOAD, 0);
       methodVisitor.visitMethodInsn(INVOKEVIRTUAL, "Host$Member2", "m", "(LHost;)V", false);
       Label label2 = new Label();
       methodVisitor.visitLabel(label2);
       methodVisitor.visitLineNumber(20, label2);
       methodVisitor.visitInsn(RETURN);
       methodVisitor.visitMaxs(2, 1);
       methodVisitor.visitEnd();
     }
     {
       methodVisitor =
           classWriter.visitMethod(methodAccess, "h2", "(Ljava/lang/String;)V", null, null);
       methodVisitor.visitCode();
       Label label0 = new Label();
       methodVisitor.visitLabel(label0);
       methodVisitor.visitLineNumber(23, label0);
       methodVisitor.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
       methodVisitor.visitVarInsn(ALOAD, 1);
       methodVisitor.visitMethodInsn(
           INVOKEVIRTUAL, "java/io/PrintStream", "print", "(Ljava/lang/String;)V", false);
       Label label1 = new Label();
       methodVisitor.visitLabel(label1);
       methodVisitor.visitLineNumber(24, label1);
       methodVisitor.visitInsn(RETURN);
       methodVisitor.visitMaxs(2, 2);
       methodVisitor.visitEnd();
     }
     classWriter.visitEnd();

     return classWriter.toByteArray();
   }

   public static byte[] dumpMember1(int methodAccess) throws Exception {
     assert methodAccess == ACC_PUBLIC || methodAccess == ACC_PRIVATE;

     ClassWriter classWriter = new ClassWriter(0);
     MethodVisitor methodVisitor;

     classWriter.visit(V11, ACC_SUPER, "Host$Member1", null, "java/lang/Object", null);
     classWriter.visitSource("Host.java", null);
     classWriter.visitNestHost("Host");
     classWriter.visitInnerClass("Host$Member1", "Host", "Member1", ACC_STATIC);
     {
       methodVisitor = classWriter.visitMethod(0, "<init>", "()V", null, null);
       methodVisitor.visitCode();
       Label label0 = new Label();
       methodVisitor.visitLabel(label0);
       methodVisitor.visitLineNumber(7, label0);
       methodVisitor.visitVarInsn(ALOAD, 0);
       methodVisitor.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
       methodVisitor.visitInsn(RETURN);
       methodVisitor.visitMaxs(1, 1);
       methodVisitor.visitEnd();
     }
     {
       methodVisitor = classWriter.visitMethod(methodAccess, "m", "(LHost;)V", null, null);
       methodVisitor.visitCode();
       Label label0 = new Label();
       methodVisitor.visitLabel(label0);
       methodVisitor.visitLineNumber(9, label0);
       methodVisitor.visitVarInsn(ALOAD, 1);
       methodVisitor.visitLdcInsn("Hello");
       methodVisitor.visitMethodInsn(INVOKEVIRTUAL, "Host", "h2", "(Ljava/lang/String;)V", false);
       Label label1 = new Label();
       methodVisitor.visitLabel(label1);
       methodVisitor.visitLineNumber(10, label1);
       methodVisitor.visitInsn(RETURN);
       methodVisitor.visitMaxs(2, 2);
       methodVisitor.visitEnd();
     }
     classWriter.visitEnd();

     return classWriter.toByteArray();
   }

   public static byte[] dumpMember2(int methodAccess) throws Exception {
     assert methodAccess == ACC_PUBLIC || methodAccess == ACC_PRIVATE;

     ClassWriter classWriter = new ClassWriter(0);
     MethodVisitor methodVisitor;

     classWriter.visit(V11, ACC_SUPER, "Host$Member2", null, "java/lang/Object", null);
     classWriter.visitSource("Host.java", null);
     classWriter.visitNestHost("Host");
     classWriter.visitInnerClass("Host$Member2", "Host", "Member2", ACC_STATIC);
     {
       methodVisitor = classWriter.visitMethod(0, "<init>", "()V", null, null);
       methodVisitor.visitCode();
       Label label0 = new Label();
       methodVisitor.visitLabel(label0);
       methodVisitor.visitLineNumber(13, label0);
       methodVisitor.visitVarInsn(ALOAD, 0);
       methodVisitor.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
       methodVisitor.visitInsn(RETURN);
       methodVisitor.visitMaxs(1, 1);
       methodVisitor.visitEnd();
     }
     {
       methodVisitor = classWriter.visitMethod(methodAccess, "m", "(LHost;)V", null, null);
       methodVisitor.visitCode();
       Label label0 = new Label();
       methodVisitor.visitLabel(label0);
       methodVisitor.visitLineNumber(14, label0);
       methodVisitor.visitVarInsn(ALOAD, 1);
       methodVisitor.visitLdcInsn(", world!");
       methodVisitor.visitMethodInsn(INVOKEVIRTUAL, "Host", "h2", "(Ljava/lang/String;)V", false);
       methodVisitor.visitInsn(RETURN);
       methodVisitor.visitMaxs(2, 2);
       methodVisitor.visitEnd();
     }
     classWriter.visitEnd();

     return classWriter.toByteArray();
   }
 }
	// Copyright (c) 2022, 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.desugar.nestaccesscontrol;

	import static org.junit.Assert.assertEquals;
	import static org.junit.Assert.assertFalse;
	import static org.junit.Assume.assumeTrue;

	import com.android.tools.r8.TestParameters;
	import com.android.tools.r8.utils.AndroidApiLevel;
	import com.android.tools.r8.utils.StringUtils;
	import com.android.tools.r8.utils.codeinspector.ClassSubject;
	import com.android.tools.r8.utils.codeinspector.CodeInspector;
	import com.android.tools.r8.utils.codeinspector.TypeSubject;
	import com.google.common.collect.ImmutableList;
	import java.util.List;
	import org.junit.Test;
	import org.junit.runner.RunWith;
	import org.junit.runners.Parameterized;
	import org.junit.runners.Parameterized.Parameter;
	import org.junit.runners.Parameterized.Parameters;
	import org.objectweb.asm.ClassWriter;
	import org.objectweb.asm.Label;
	import org.objectweb.asm.MethodVisitor;
	import org.objectweb.asm.Opcodes;

	@RunWith(Parameterized.class)
	public class NestAttributesInDexShrinkingTest extends NestAttributesInDexTestBase
	implements Opcodes {

	@Parameter() public TestParameters parameters;

	@Parameters(name = "{0}")
	public static List<Object[]> data() {
	return buildParameters(
	getTestParameters().withAllRuntimes().withAllApiLevelsAlsoForCf().build());
	}

	private static final String EXPECTED_OUTPUT = StringUtils.lines("Hello, world!");

	@Test
	public void testRuntime() throws Exception {
	assumeTrue(
	parameters.isCfRuntime()
	&& isRuntimeWithNestSupport(parameters.asCfRuntime())
	&& parameters.getApiLevel().isEqualTo(AndroidApiLevel.B));
	testForJvm()
	.addProgramClassFileData(
	dumpHost(ACC_PRIVATE), dumpMember1(ACC_PRIVATE), dumpMember2(ACC_PRIVATE))
	.run(parameters.getRuntime(), "Host")
	.assertSuccessWithOutput(EXPECTED_OUTPUT);
	}

	private void inspect(CodeInspector inspector, boolean expectNestAttributes) {
	ClassSubject host = inspector.clazz("Host");
	ClassSubject member1 = inspector.clazz("Host$Member1");
	ClassSubject member2 = inspector.clazz("Host$Member2");
	if (expectNestAttributes) {
	assertEquals(
	ImmutableList.of(member2.asTypeSubject(), member1.asTypeSubject()),
	host.getFinalNestMembersAttribute());
	} else {
	assertEquals(0, host.getFinalNestMembersAttribute().size());
	}
	TypeSubject expectedNestHostAttribute = expectNestAttributes ? host.asTypeSubject() : null;
	assertEquals(expectedNestHostAttribute, member1.getFinalNestHostAttribute());
	assertEquals(expectedNestHostAttribute, member2.getFinalNestHostAttribute());
	}

	private void expectNestAttributes(CodeInspector inspector) {
	if (parameters.isCfRuntime()) {
	inspect(inspector, true);
	} else {
	// TODO(b/236125275): DEX should also have the nest attributes.
	expectNoNestAttributes(inspector);
	}
	}

	private void expectNoNestAttributes(CodeInspector inspector) {
	inspect(inspector, false);
	}

	@Test
	public void testR8() throws Exception {
	assumeTrue(parameters.isDexRuntime() \|\| isRuntimeWithNestSupport(parameters.asCfRuntime()));
	// TODO(b/247047415): Update test when a DEX VM natively supporting nests is added.
	assertFalse(parameters.getApiLevel().getLevel() > 33);
	testForR8(parameters.getBackend())
	.addProgramClassFileData(
	dumpHost(ACC_PRIVATE), dumpMember1(ACC_PRIVATE), dumpMember2(ACC_PRIVATE))
	.addKeepMainRule("Host")
	.setMinApi(parameters.getApiLevel())
	.addOptionsModification(options -> options.emitNestAnnotationsInDex = true)
	.compile()
	.inspect(inspector -> assertEquals(1, inspector.allClasses().size()))
	.run(parameters.getRuntime(), "Host")
	.assertSuccessWithOutput(EXPECTED_OUTPUT);
	}

	@Test
	public void testR8KeepHostWithPrivateMembers() throws Exception {
	assumeTrue(parameters.isDexRuntime() \|\| isRuntimeWithNestSupport(parameters.asCfRuntime()));
	// TODO(b/247047415): Update test when a DEX VM natively supporting nests is added.
	assertFalse(parameters.getApiLevel().getLevel() > 33);
	testForR8(parameters.getBackend())
	.addProgramClassFileData(
	dumpHost(ACC_PRIVATE), dumpMember1(ACC_PRIVATE), dumpMember2(ACC_PRIVATE))
	.setMinApi(parameters.getApiLevel())
	.addOptionsModification(options -> options.emitNestAnnotationsInDex = true)
	.addKeepMainRule("Host")
	.addKeepClassAndMembersRules("Host", "Host$Member1", "Host$Member2")
	.compile()
	.inspect(this::expectNestAttributes)
	.run(parameters.getRuntime(), "Host")
	.applyIf(
	parameters.isCfRuntime(),
	r -> r.assertSuccessWithOutput(EXPECTED_OUTPUT),
	r -> r.assertFailureWithErrorThatThrows(IllegalAccessError.class));
	}

	@Test
	public void testR8KeepHostWithPublicMembers() throws Exception {
	assumeTrue(parameters.isDexRuntime() \|\| isRuntimeWithNestSupport(parameters.asCfRuntime()));
	// TODO(b/247047415): Update test when a DEX VM natively supporting nests is added.
	assertFalse(parameters.getApiLevel().getLevel() > 33);
	testForR8(parameters.getBackend())
	.addProgramClassFileData(
	dumpHost(ACC_PUBLIC), dumpMember1(ACC_PUBLIC), dumpMember2(ACC_PUBLIC))
	.setMinApi(parameters.getApiLevel())
	.addOptionsModification(options -> options.emitNestAnnotationsInDex = true)
	.addKeepMainRule("Host")
	.addKeepClassAndMembersRules("Host", "Host$Member1", "Host$Member2")
	.compile()
	.inspect(this::expectNoNestAttributes)
	.run(parameters.getRuntime(), "Host")
	.assertSuccessWithOutput(EXPECTED_OUTPUT);
	}

	/*
	Dump of:

	public class Host {
	public static void main(String[] args) {
	new Host().h1();
	System.out.println();
	}

	static class Member1 {
	private void m(Host host) { // private or public
	host.h2("Hello");
	}
	}

	static class Member2 {
	private void m(Host host) { // private or public
	host.h2(", world!");
	}
	}

	private void h1() { // private or public
	new Member1().m(this);
	new Member2().m(this);
	}

	private void h2(String message) { // private or public
	System.out.print(message);
	}
	}

	compiled with `-target 11`. Not a transformer here, as transforming the javac post nest
	access methods is not feasible.
	*/

	public static byte[] dumpHost(int methodAccess) throws Exception {
	assert methodAccess == ACC_PUBLIC \|\| methodAccess == ACC_PRIVATE;

	ClassWriter classWriter = new ClassWriter(0);
	MethodVisitor methodVisitor;

	classWriter.visit(V11, ACC_PUBLIC \| ACC_SUPER, "Host", null, "java/lang/Object", null);
	classWriter.visitSource("Host.java", null);
	classWriter.visitNestMember("Host$Member2");
	classWriter.visitNestMember("Host$Member1");
	classWriter.visitInnerClass("Host$Member2", "Host", "Member2", ACC_STATIC);
	classWriter.visitInnerClass("Host$Member1", "Host", "Member1", ACC_STATIC);
	{
	methodVisitor = classWriter.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
	methodVisitor.visitCode();
	Label label0 = new Label();
	methodVisitor.visitLabel(label0);
	methodVisitor.visitLineNumber(1, label0);
	methodVisitor.visitVarInsn(ALOAD, 0);
	methodVisitor.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
	methodVisitor.visitInsn(RETURN);
	methodVisitor.visitMaxs(1, 1);
	methodVisitor.visitEnd();
	}
	{
	methodVisitor =
	classWriter.visitMethod(
	ACC_PUBLIC \| ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null);
	methodVisitor.visitCode();
	Label label0 = new Label();
	methodVisitor.visitLabel(label0);
	methodVisitor.visitLineNumber(3, label0);
	methodVisitor.visitTypeInsn(NEW, "Host");
	methodVisitor.visitInsn(DUP);
	methodVisitor.visitMethodInsn(INVOKESPECIAL, "Host", "<init>", "()V", false);
	methodVisitor.visitMethodInsn(INVOKEVIRTUAL, "Host", "h1", "()V", false);
	Label label1 = new Label();
	methodVisitor.visitLabel(label1);
	methodVisitor.visitLineNumber(4, label1);
	methodVisitor.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
	methodVisitor.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "()V", false);
	Label label2 = new Label();
	methodVisitor.visitLabel(label2);
	methodVisitor.visitLineNumber(5, label2);
	methodVisitor.visitInsn(RETURN);
	methodVisitor.visitMaxs(2, 1);
	methodVisitor.visitEnd();
	}
	{
	methodVisitor = classWriter.visitMethod(methodAccess, "h1", "()V", null, null);
	methodVisitor.visitCode();
	Label label0 = new Label();
	methodVisitor.visitLabel(label0);
	methodVisitor.visitLineNumber(18, label0);
	methodVisitor.visitTypeInsn(NEW, "Host$Member1");
	methodVisitor.visitInsn(DUP);
	methodVisitor.visitMethodInsn(INVOKESPECIAL, "Host$Member1", "<init>", "()V", false);
	methodVisitor.visitVarInsn(ALOAD, 0);
	methodVisitor.visitMethodInsn(INVOKEVIRTUAL, "Host$Member1", "m", "(LHost;)V", false);
	Label label1 = new Label();
	methodVisitor.visitLabel(label1);
	methodVisitor.visitLineNumber(19, label1);
	methodVisitor.visitTypeInsn(NEW, "Host$Member2");
	methodVisitor.visitInsn(DUP);
	methodVisitor.visitMethodInsn(INVOKESPECIAL, "Host$Member2", "<init>", "()V", false);
	methodVisitor.visitVarInsn(ALOAD, 0);
	methodVisitor.visitMethodInsn(INVOKEVIRTUAL, "Host$Member2", "m", "(LHost;)V", false);
	Label label2 = new Label();
	methodVisitor.visitLabel(label2);
	methodVisitor.visitLineNumber(20, label2);
	methodVisitor.visitInsn(RETURN);
	methodVisitor.visitMaxs(2, 1);
	methodVisitor.visitEnd();
	}
	{
	methodVisitor =
	classWriter.visitMethod(methodAccess, "h2", "(Ljava/lang/String;)V", null, null);
	methodVisitor.visitCode();
	Label label0 = new Label();
	methodVisitor.visitLabel(label0);
	methodVisitor.visitLineNumber(23, label0);
	methodVisitor.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
	methodVisitor.visitVarInsn(ALOAD, 1);
	methodVisitor.visitMethodInsn(
	INVOKEVIRTUAL, "java/io/PrintStream", "print", "(Ljava/lang/String;)V", false);
	Label label1 = new Label();
	methodVisitor.visitLabel(label1);
	methodVisitor.visitLineNumber(24, label1);
	methodVisitor.visitInsn(RETURN);
	methodVisitor.visitMaxs(2, 2);
	methodVisitor.visitEnd();
	}
	classWriter.visitEnd();

	return classWriter.toByteArray();
	}

	public static byte[] dumpMember1(int methodAccess) throws Exception {
	assert methodAccess == ACC_PUBLIC \|\| methodAccess == ACC_PRIVATE;

	ClassWriter classWriter = new ClassWriter(0);
	MethodVisitor methodVisitor;

	classWriter.visit(V11, ACC_SUPER, "Host$Member1", null, "java/lang/Object", null);
	classWriter.visitSource("Host.java", null);
	classWriter.visitNestHost("Host");
	classWriter.visitInnerClass("Host$Member1", "Host", "Member1", ACC_STATIC);
	{
	methodVisitor = classWriter.visitMethod(0, "<init>", "()V", null, null);
	methodVisitor.visitCode();
	Label label0 = new Label();
	methodVisitor.visitLabel(label0);
	methodVisitor.visitLineNumber(7, label0);
	methodVisitor.visitVarInsn(ALOAD, 0);
	methodVisitor.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
	methodVisitor.visitInsn(RETURN);
	methodVisitor.visitMaxs(1, 1);
	methodVisitor.visitEnd();
	}
	{
	methodVisitor = classWriter.visitMethod(methodAccess, "m", "(LHost;)V", null, null);
	methodVisitor.visitCode();
	Label label0 = new Label();
	methodVisitor.visitLabel(label0);
	methodVisitor.visitLineNumber(9, label0);
	methodVisitor.visitVarInsn(ALOAD, 1);
	methodVisitor.visitLdcInsn("Hello");
	methodVisitor.visitMethodInsn(INVOKEVIRTUAL, "Host", "h2", "(Ljava/lang/String;)V", false);
	Label label1 = new Label();
	methodVisitor.visitLabel(label1);
	methodVisitor.visitLineNumber(10, label1);
	methodVisitor.visitInsn(RETURN);
	methodVisitor.visitMaxs(2, 2);
	methodVisitor.visitEnd();
	}
	classWriter.visitEnd();

	return classWriter.toByteArray();
	}

	public static byte[] dumpMember2(int methodAccess) throws Exception {
	assert methodAccess == ACC_PUBLIC \|\| methodAccess == ACC_PRIVATE;

	ClassWriter classWriter = new ClassWriter(0);
	MethodVisitor methodVisitor;

	classWriter.visit(V11, ACC_SUPER, "Host$Member2", null, "java/lang/Object", null);
	classWriter.visitSource("Host.java", null);
	classWriter.visitNestHost("Host");
	classWriter.visitInnerClass("Host$Member2", "Host", "Member2", ACC_STATIC);
	{
	methodVisitor = classWriter.visitMethod(0, "<init>", "()V", null, null);
	methodVisitor.visitCode();
	Label label0 = new Label();
	methodVisitor.visitLabel(label0);
	methodVisitor.visitLineNumber(13, label0);
	methodVisitor.visitVarInsn(ALOAD, 0);
	methodVisitor.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
	methodVisitor.visitInsn(RETURN);
	methodVisitor.visitMaxs(1, 1);
	methodVisitor.visitEnd();
	}
	{
	methodVisitor = classWriter.visitMethod(methodAccess, "m", "(LHost;)V", null, null);
	methodVisitor.visitCode();
	Label label0 = new Label();
	methodVisitor.visitLabel(label0);
	methodVisitor.visitLineNumber(14, label0);
	methodVisitor.visitVarInsn(ALOAD, 1);
	methodVisitor.visitLdcInsn(", world!");
	methodVisitor.visitMethodInsn(INVOKEVIRTUAL, "Host", "h2", "(Ljava/lang/String;)V", false);
	methodVisitor.visitInsn(RETURN);
	methodVisitor.visitMaxs(2, 2);
	methodVisitor.visitEnd();
	}
	classWriter.visitEnd();

	return classWriter.toByteArray();
	}
	}