src/test/java/com/android/tools/r8/ir/optimize/checkcast/IllegalAccessErrorTestDump.java

// Copyright (c) 2018, 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.ir.optimize.checkcast;

import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;

/* Generated by running tools/asmifier.py on the following code snippet:

  public class Test {
    public static void main(String[] args) {
      try {
        System.out.println((NonAccessible) null);
      } catch (IllegalAccessError e) {
        System.out.println("Expect to catch IAE during check-cast of null");
      }
    }
  }

  where NonAccessible will be added as a package-private class later.
*/
class IllegalAccessErrorTestDump implements Opcodes {

  final static String MESSAGE = "Expect to catch IAE during check-cast of null";

  public static byte[] dump () {

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

    classWriter.visit(V1_8, ACC_PUBLIC | ACC_SUPER, "Test", null, "java/lang/Object", null);

    classWriter.visitSource("Test.java", null);

    {
      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();
      Label label1 = new Label();
      Label label2 = new Label();
      methodVisitor.visitTryCatchBlock(label0, label1, label2, "java/lang/IllegalAccessError");
      methodVisitor.visitLabel(label0);
      methodVisitor.visitLineNumber(4, label0);
      methodVisitor.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
      methodVisitor.visitInsn(ACONST_NULL);
      // Manually tweak to point to package-private one.
      methodVisitor.visitTypeInsn(
          CHECKCAST, "com/android/tools/r8/ir/optimize/checkcast/NonAccessible");
      methodVisitor.visitMethodInsn(
          INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/Object;)V", false);
      methodVisitor.visitLabel(label1);
      methodVisitor.visitLineNumber(7, label1);
      Label label3 = new Label();
      methodVisitor.visitJumpInsn(GOTO, label3);
      methodVisitor.visitLabel(label2);
      methodVisitor.visitLineNumber(5, label2);
      methodVisitor.visitFrame(
          Opcodes.F_SAME1, 0, null, 1, new Object[] {"java/lang/IllegalAccessError"});
      methodVisitor.visitVarInsn(ASTORE, 1);
      Label label4 = new Label();
      methodVisitor.visitLabel(label4);
      methodVisitor.visitLineNumber(6, label4);
      methodVisitor.visitFieldInsn(
          GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
      methodVisitor.visitLdcInsn(MESSAGE);
      methodVisitor.visitMethodInsn(
          INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false);
      methodVisitor.visitLabel(label3);
      methodVisitor.visitLineNumber(8, label3);
      methodVisitor.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
      methodVisitor.visitInsn(RETURN);
      methodVisitor.visitMaxs(2, 2);
      methodVisitor.visitEnd();
    }
    classWriter.visitEnd();

    return classWriter.toByteArray();
  }
}