| // 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.debuginfo; |
| |
| import org.objectweb.asm.AnnotationVisitor; |
| import org.objectweb.asm.ClassWriter; |
| import org.objectweb.asm.FieldVisitor; |
| import org.objectweb.asm.Label; |
| import org.objectweb.asm.MethodVisitor; |
| import org.objectweb.asm.Opcodes; |
| |
| public class DebugInfoDump implements Opcodes { |
| |
| private static final String INTERNAL_NAME = "Foo"; |
| public static final String CLASS_NAME = INTERNAL_NAME.replace('/', '.'); |
| |
| public static byte[] dump() throws Exception { |
| |
| ClassWriter cw = new ClassWriter(0); |
| FieldVisitor fv; |
| AnnotationVisitor av0; |
| |
| cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, INTERNAL_NAME, null, "java/lang/Object", null); |
| |
| { |
| fv = cw.visitField(ACC_PRIVATE + ACC_FINAL, "f1", "L" + INTERNAL_NAME + ";", null, null); |
| fv.visitEnd(); |
| } |
| { |
| fv = cw.visitField(ACC_PRIVATE + ACC_FINAL, "f2", "Ljava/util/List;", null, null); |
| fv.visitEnd(); |
| } |
| foo(cw); |
| main(cw); |
| bar(cw); |
| cw.visitEnd(); |
| |
| return cw.toByteArray(); |
| } |
| |
| private static void bar(ClassWriter cw) { |
| MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "bar", "()I", null, null); |
| mv.visitCode(); |
| mv.visitLdcInsn(42); |
| mv.visitInsn(IRETURN); |
| mv.visitMaxs(1, 1); |
| mv.visitEnd(); |
| } |
| |
| private static void main(ClassWriter cw) { |
| MethodVisitor mv = |
| cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null); |
| mv.visitCode(); |
| mv.visitInsn(RETURN); |
| mv.visitMaxs(0, 1); |
| mv.visitEnd(); |
| } |
| |
| private static void foo(ClassWriter cw) { |
| MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "foo", "()I", null, null); |
| Label[] labels = new Label[11]; |
| for (int i = 0; i < labels.length; i++) { |
| labels[i] = new Label(); |
| } |
| mv.visitCode(); |
| mv.visitLabel(labels[0]); |
| mv.visitLineNumber(10, labels[0]); |
| mv.visitIntInsn(BIPUSH, 12); |
| mv.visitVarInsn(ISTORE, 1); |
| mv.visitLabel(labels[1]); |
| mv.visitLineNumber(11, labels[1]); |
| mv.visitIincInsn(1, 28); |
| mv.visitLabel(labels[2]); |
| mv.visitLineNumber(13, labels[2]); |
| mv.visitVarInsn(ALOAD, 0); |
| mv.visitFieldInsn(GETFIELD, INTERNAL_NAME, "f1", "L" + INTERNAL_NAME + ";"); |
| mv.visitJumpInsn(IFNULL, labels[3]); |
| mv.visitLabel(labels[4]); |
| mv.visitLineNumber(14, labels[4]); |
| mv.visitVarInsn(ILOAD, 1); |
| mv.visitVarInsn(ALOAD, 0); |
| mv.visitFieldInsn(GETFIELD, INTERNAL_NAME, "f1", "L" + INTERNAL_NAME + ";"); |
| mv.visitMethodInsn(INVOKEVIRTUAL, INTERNAL_NAME, "bar", "()I", false); |
| mv.visitInsn(IADD); |
| mv.visitVarInsn(ISTORE, 1); |
| mv.visitLabel(labels[3]); |
| mv.visitLineNumber(17, labels[3]); |
| mv.visitFrame(Opcodes.F_APPEND, 1, new Object[] {Opcodes.INTEGER}, 0, null); |
| mv.visitVarInsn(ALOAD, 0); |
| mv.visitFieldInsn(GETFIELD, INTERNAL_NAME, "f2", "Ljava/util/List;"); |
| mv.visitJumpInsn(IFNULL, labels[5]); |
| mv.visitLabel(labels[6]); |
| mv.visitLineNumber(18, labels[6]); |
| mv.visitVarInsn(ALOAD, 0); |
| mv.visitFieldInsn(GETFIELD, INTERNAL_NAME, "f2", "Ljava/util/List;"); |
| mv.visitMethodInsn( |
| INVOKEINTERFACE, "java/util/List", "iterator", "()Ljava/util/Iterator;", true); |
| mv.visitVarInsn(ASTORE, 2); |
| mv.visitLabel(labels[7]); |
| mv.visitFrame(Opcodes.F_APPEND, 1, new Object[] {"java/util/Iterator"}, 0, null); |
| mv.visitVarInsn(ALOAD, 2); |
| mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Iterator", "hasNext", "()Z", true); |
| mv.visitJumpInsn(IFEQ, labels[5]); |
| mv.visitVarInsn(ALOAD, 2); |
| mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Iterator", "next", "()Ljava/lang/Object;", true); |
| mv.visitTypeInsn(CHECKCAST, INTERNAL_NAME); |
| mv.visitVarInsn(ASTORE, 3); |
| mv.visitLabel(labels[8]); |
| mv.visitLineNumber(19, labels[8]); |
| mv.visitVarInsn(ILOAD, 1); |
| mv.visitVarInsn(ALOAD, 3); |
| mv.visitInsn(POP); |
| mv.visitMethodInsn(INVOKESTATIC, INTERNAL_NAME, "foo", "()I", false); |
| mv.visitInsn(IADD); |
| mv.visitVarInsn(ISTORE, 1); |
| mv.visitLabel(labels[9]); |
| mv.visitLineNumber(20, labels[9]); |
| mv.visitJumpInsn(GOTO, labels[7]); |
| mv.visitLabel(labels[5]); |
| mv.visitLineNumber(23, labels[5]); |
| mv.visitFrame(Opcodes.F_CHOP, 1, null, 0, null); |
| mv.visitVarInsn(ILOAD, 1); |
| mv.visitInsn(IRETURN); |
| mv.visitLabel(labels[10]); |
| mv.visitLocalVariable("b", "L" + INTERNAL_NAME + ";", null, labels[8], labels[9], 3); |
| mv.visitLocalVariable("this", "L" + INTERNAL_NAME + ";", null, labels[0], labels[10], 0); |
| mv.visitLocalVariable("a", "I", null, labels[1], labels[10], 1); |
| mv.visitMaxs(2, 4); |
| mv.visitEnd(); |
| } |
| } |