| // Copyright 2017 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 com.google.devtools.build.android.desugar; |
| |
| import com.google.common.base.Preconditions; |
| import com.google.common.collect.ImmutableList; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.PrintWriter; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.util.Comparator; |
| import java.util.zip.ZipEntry; |
| import java.util.zip.ZipFile; |
| import org.objectweb.asm.ClassReader; |
| import org.objectweb.asm.ClassVisitor; |
| import org.objectweb.asm.Handle; |
| import org.objectweb.asm.Label; |
| import org.objectweb.asm.MethodVisitor; |
| import org.objectweb.asm.Opcodes; |
| import org.objectweb.asm.util.Textifier; |
| |
| /** Print the types of the operand stack for each method. */ |
| public class ByteCodeTypePrinter { |
| |
| public static void printClassesWithTypes(Path inputJarFile, PrintWriter printWriter) |
| throws IOException { |
| Preconditions.checkState( |
| Files.exists(inputJarFile), "The input jar file %s does not exist.", inputJarFile); |
| try (ZipFile jarFile = new ZipFile(inputJarFile.toFile())) { |
| for (ZipEntry entry : getSortedClassEntriess(jarFile)) { |
| try (InputStream classStream = jarFile.getInputStream(entry)) { |
| printWriter.println("\nClass: " + entry.getName()); |
| ClassReader classReader = new ClassReader(classStream); |
| ClassVisitor visitor = new ClassWithTypeDumper(printWriter); |
| classReader.accept(visitor, 0); |
| } |
| printWriter.println("\n"); |
| } |
| } |
| } |
| |
| private static ImmutableList<ZipEntry> getSortedClassEntriess(ZipFile jar) { |
| return jar.stream() |
| .filter(entry -> entry.getName().endsWith(".class")) |
| .sorted(Comparator.comparing(ZipEntry::getName)) |
| .collect(ImmutableList.toImmutableList()); |
| } |
| |
| private static class ClassWithTypeDumper extends ClassVisitor { |
| |
| private String internalName; |
| private final PrintWriter printWriter; |
| |
| public ClassWithTypeDumper(PrintWriter printWriter) { |
| super(Opcodes.ASM5); |
| this.printWriter = printWriter; |
| } |
| |
| @Override |
| public void visit( |
| int version, |
| int access, |
| String name, |
| String signature, |
| String superName, |
| String[] interfaces) { |
| internalName = name; |
| super.visit(version, access, name, signature, superName, interfaces); |
| } |
| |
| @Override |
| public MethodVisitor visitMethod( |
| int access, String name, String desc, String signature, String[] exceptions) { |
| printWriter.println("Method " + name); |
| MethodVisitor mv = super.visitMethod(access, name, desc, signature, exceptions); |
| BytecodeTypeInference inference = new BytecodeTypeInference(access, internalName, name, desc); |
| mv = new MethodIrTypeDumper(mv, inference, printWriter); |
| inference.setDelegateMethodVisitor(mv); |
| // Let the type inference runs first. |
| return inference; |
| } |
| } |
| |
| private static final class TextifierExt extends Textifier { |
| |
| public TextifierExt() { |
| super(Opcodes.ASM5); |
| } |
| |
| public void print(String string) { |
| text.add(tab2 + string); |
| } |
| } |
| |
| private static class MethodIrTypeDumper extends MethodVisitor { |
| |
| private final BytecodeTypeInference inference; |
| private final TextifierExt printer = new TextifierExt(); |
| private final PrintWriter printWriter; |
| |
| public MethodIrTypeDumper( |
| MethodVisitor visitor, BytecodeTypeInference inference, PrintWriter printWriter) { |
| super(Opcodes.ASM5, visitor); |
| this.inference = inference; |
| this.printWriter = printWriter; |
| } |
| |
| private void printTypeOfOperandStack() { |
| printer.print(" |__STACK: " + inference.getOperandStackAsString() + "\n"); |
| printer.print(" |__LOCAL: " + inference.getLocalsAsString() + "\n"); |
| } |
| |
| @Override |
| public void visitIntInsn(int opcode, int operand) { |
| printer.visitIntInsn(opcode, operand); |
| printTypeOfOperandStack(); |
| super.visitIntInsn(opcode, operand); |
| } |
| |
| @Override |
| public void visitInsn(int opcode) { |
| printer.visitInsn(opcode); |
| printTypeOfOperandStack(); |
| super.visitInsn(opcode); |
| } |
| |
| @Override |
| public void visitMultiANewArrayInsn(String desc, int dims) { |
| printer.visitMultiANewArrayInsn(desc, dims); |
| printTypeOfOperandStack(); |
| super.visitMultiANewArrayInsn(desc, dims); |
| } |
| |
| @Override |
| public void visitLookupSwitchInsn(Label dflt, int[] keys, Label[] labels) { |
| printer.visitLookupSwitchInsn(dflt, keys, labels); |
| printTypeOfOperandStack(); |
| super.visitLookupSwitchInsn(dflt, keys, labels); |
| } |
| |
| @Override |
| public void visitTableSwitchInsn(int min, int max, Label dflt, Label... labels) { |
| printer.visitTableSwitchInsn(min, max, dflt, labels); |
| printTypeOfOperandStack(); |
| super.visitTableSwitchInsn(min, max, dflt, labels); |
| } |
| |
| @Override |
| public void visitIincInsn(int var, int increment) { |
| printer.visitIincInsn(var, increment); |
| printTypeOfOperandStack(); |
| super.visitIincInsn(var, increment); |
| } |
| |
| @Override |
| public void visitLdcInsn(Object cst) { |
| printer.visitLdcInsn(cst); |
| printTypeOfOperandStack(); |
| super.visitLdcInsn(cst); |
| } |
| |
| @Override |
| public void visitJumpInsn(int opcode, Label label) { |
| printer.visitJumpInsn(opcode, label); |
| printTypeOfOperandStack(); |
| super.visitJumpInsn(opcode, label); |
| } |
| |
| @Override |
| public void visitInvokeDynamicInsn(String name, String desc, Handle bsm, Object... bsmArgs) { |
| printer.visitInvokeDynamicInsn(name, desc, bsm, bsmArgs); |
| printTypeOfOperandStack(); |
| super.visitInvokeDynamicInsn(name, desc, bsm, bsmArgs); |
| } |
| |
| @Override |
| public void visitMethodInsn(int opcode, String owner, String name, String desc, boolean itf) { |
| printer.visitMethodInsn(opcode, owner, name, desc, itf); |
| printTypeOfOperandStack(); |
| super.visitMethodInsn(opcode, owner, name, desc, itf); |
| } |
| |
| @Override |
| public void visitMethodInsn(int opcode, String owner, String name, String desc) { |
| printer.visitMethodInsn(opcode, owner, name, desc); |
| printTypeOfOperandStack(); |
| super.visitMethodInsn(opcode, owner, name, desc); |
| } |
| |
| @Override |
| public void visitFieldInsn(int opcode, String owner, String name, String desc) { |
| printer.visitFieldInsn(opcode, owner, name, desc); |
| printTypeOfOperandStack(); |
| super.visitFieldInsn(opcode, owner, name, desc); |
| } |
| |
| @Override |
| public void visitTypeInsn(int opcode, String type) { |
| printer.visitTypeInsn(opcode, type); |
| printTypeOfOperandStack(); |
| super.visitTypeInsn(opcode, type); |
| } |
| |
| @Override |
| public void visitVarInsn(int opcode, int var) { |
| printer.visitVarInsn(opcode, var); |
| printTypeOfOperandStack(); |
| super.visitVarInsn(opcode, var); |
| } |
| |
| @Override |
| public void visitFrame(int type, int nLocal, Object[] local, int nStack, Object[] stack) { |
| printer.visitFrame(type, nLocal, local, nStack, stack); |
| super.visitFrame(type, nLocal, local, nStack, stack); |
| } |
| |
| @Override |
| public void visitLabel(Label label) { |
| printer.visitLabel(label); |
| super.visitLabel(label); |
| } |
| |
| @Override |
| public void visitEnd() { |
| printer.print(printWriter); |
| printWriter.flush(); |
| super.visitEnd(); |
| } |
| } |
| } |