| // Copyright (c) 2019, 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.naming.applymapping.shared; |
| |
| import com.android.tools.r8.naming.applymapping.shared.ProgramWithLibraryClasses.LibraryClass; |
| 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; |
| |
| // asmified the following: |
| // class ProgramClass extends LibraryClass { |
| // static String PRG_MSG = "ProgramClass::bar"; |
| // void bar() { |
| // System.out.println(PRG_MSG); |
| // } |
| // public static void main(String[] args) { |
| // new AnotherLibraryClass().foo(); |
| // ProgramClass instance = new ProgramClass(); |
| // instance.foo(); |
| // instance.bar(); |
| // } |
| // } |
| // |
| // then replaced the use of LibraryClass and AnotherLibraryClass with A and B so that providing |
| // LibraryClass and AnotherLibraryClass, along with mapping, as a minified library: |
| // A -> LibraryClass: |
| // void a() -> foo |
| // B -> AnotherLibraryClass: |
| // void a() -> foo |
| public class ProgramClassDump implements Opcodes { |
| |
| public static byte[] dump () throws Exception { |
| |
| ClassWriter classWriter = new ClassWriter(0); |
| FieldVisitor fieldVisitor; |
| MethodVisitor methodVisitor; |
| |
| String pkg = LibraryClass.class.getPackage().getName(); |
| |
| classWriter.visit(V1_8, ACC_SUPER, pkg.replace('.', '/') + "/ProgramClass", null, "A", null); |
| |
| classWriter.visitSource("Test.java", null); |
| |
| { |
| fieldVisitor = classWriter.visitField( |
| ACC_STATIC, "PRG_MSG", "Ljava/lang/String;", null, null); |
| fieldVisitor.visitEnd(); |
| } |
| { |
| methodVisitor = classWriter.visitMethod(0, "<init>", "()V", null, null); |
| methodVisitor.visitCode(); |
| Label label0 = new Label(); |
| methodVisitor.visitLabel(label0); |
| methodVisitor.visitLineNumber(15, label0); |
| methodVisitor.visitVarInsn(ALOAD, 0); |
| methodVisitor.visitMethodInsn(INVOKESPECIAL, "A", "<init>", "()V", false); |
| methodVisitor.visitInsn(RETURN); |
| methodVisitor.visitMaxs(1, 1); |
| methodVisitor.visitEnd(); |
| } |
| { |
| methodVisitor = classWriter.visitMethod(0, "bar", "()V", null, null); |
| methodVisitor.visitCode(); |
| Label label0 = new Label(); |
| methodVisitor.visitLabel(label0); |
| methodVisitor.visitLineNumber(18, label0); |
| methodVisitor.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); |
| methodVisitor.visitFieldInsn(GETSTATIC, "ProgramClass", "PRG_MSG", "Ljava/lang/String;"); |
| methodVisitor.visitMethodInsn( |
| INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false); |
| Label label1 = new Label(); |
| methodVisitor.visitLabel(label1); |
| methodVisitor.visitLineNumber(19, label1); |
| methodVisitor.visitInsn(RETURN); |
| methodVisitor.visitMaxs(2, 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(22, label0); |
| methodVisitor.visitTypeInsn(NEW, "B"); |
| methodVisitor.visitInsn(DUP); |
| methodVisitor.visitMethodInsn(INVOKESPECIAL, "B", "<init>", "()V", false); |
| methodVisitor.visitMethodInsn(INVOKEVIRTUAL, "B", "a", "()V", false); |
| Label label1 = new Label(); |
| methodVisitor.visitLabel(label1); |
| methodVisitor.visitLineNumber(23, label1); |
| methodVisitor.visitTypeInsn(NEW, "ProgramClass"); |
| methodVisitor.visitInsn(DUP); |
| methodVisitor.visitMethodInsn(INVOKESPECIAL, "ProgramClass", "<init>", "()V", false); |
| methodVisitor.visitVarInsn(ASTORE, 1); |
| Label label2 = new Label(); |
| methodVisitor.visitLabel(label2); |
| methodVisitor.visitLineNumber(24, label2); |
| methodVisitor.visitVarInsn(ALOAD, 1); |
| methodVisitor.visitMethodInsn(INVOKEVIRTUAL, "ProgramClass", "a", "()V", false); |
| Label label3 = new Label(); |
| methodVisitor.visitLabel(label3); |
| methodVisitor.visitLineNumber(25, label3); |
| methodVisitor.visitVarInsn(ALOAD, 1); |
| methodVisitor.visitMethodInsn(INVOKEVIRTUAL, "ProgramClass", "bar", "()V", false); |
| Label label4 = new Label(); |
| methodVisitor.visitLabel(label4); |
| methodVisitor.visitLineNumber(26, label4); |
| methodVisitor.visitInsn(RETURN); |
| methodVisitor.visitMaxs(2, 2); |
| methodVisitor.visitEnd(); |
| } |
| { |
| methodVisitor = classWriter.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null); |
| methodVisitor.visitCode(); |
| Label label0 = new Label(); |
| methodVisitor.visitLabel(label0); |
| methodVisitor.visitLineNumber(16, label0); |
| methodVisitor.visitLdcInsn("ProgramClass::bar"); |
| methodVisitor.visitFieldInsn(PUTSTATIC, "ProgramClass", "PRG_MSG", "Ljava/lang/String;"); |
| methodVisitor.visitInsn(RETURN); |
| methodVisitor.visitMaxs(1, 0); |
| methodVisitor.visitEnd(); |
| } |
| classWriter.visitEnd(); |
| |
| return classWriter.toByteArray(); |
| } |
| } |