1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package dexfuzz.rawdex; 18 19 import dexfuzz.Log; 20 21 import java.io.IOException; 22 23 public class EncodedMethod implements RawDexObject { 24 public int methodIdxDiff; 25 public int accessFlags; 26 public Offset codeOff; 27 28 @Override read(DexRandomAccessFile file)29 public void read(DexRandomAccessFile file) throws IOException { 30 methodIdxDiff = file.readUleb128(); 31 accessFlags = file.readUleb128(); 32 codeOff = file.getOffsetTracker().getNewOffset(file.readUleb128()); 33 if (isNative()) { 34 Log.errorAndQuit("Sorry, DEX files with native methods are not supported yet."); 35 } 36 } 37 38 @Override write(DexRandomAccessFile file)39 public void write(DexRandomAccessFile file) throws IOException { 40 file.writeUleb128(methodIdxDiff); 41 file.writeUleb128(accessFlags); 42 file.getOffsetTracker().tryToWriteOffset(codeOff, file, true /* ULEB128 */); 43 } 44 45 @Override incrementIndex(IndexUpdateKind kind, int insertedIdx)46 public void incrementIndex(IndexUpdateKind kind, int insertedIdx) { 47 // Do nothing. 48 // NB: our idx_diff is handled in ClassDataItem... 49 } 50 isStatic()51 public boolean isStatic() { 52 return ((accessFlags & Flag.ACC_STATIC.getValue()) != 0); 53 } 54 isNative()55 public boolean isNative() { 56 return ((accessFlags & Flag.ACC_NATIVE.getValue()) != 0); 57 } 58 59 /** 60 * Set/unset the static flag for this EncodedMethod. 61 */ setStatic(boolean turnOn)62 public void setStatic(boolean turnOn) { 63 if (turnOn) { 64 accessFlags |= Flag.ACC_STATIC.getValue(); 65 } else { 66 accessFlags &= ~(Flag.ACC_STATIC.getValue()); 67 } 68 } 69 70 private static enum Flag { 71 ACC_PUBLIC(0x1), 72 ACC_PRIVATE(0x2), 73 ACC_PROTECTED(0x4), 74 ACC_STATIC(0x8), 75 ACC_FINAL(0x10), 76 ACC_SYNCHRONIZED(0x20), 77 ACC_VARARGS(0x80), 78 ACC_NATIVE(0x100), 79 ACC_ABSTRACT(0x400), 80 ACC_STRICT(0x800), 81 ACC_SYNTHETIC(0x1000), 82 ACC_ENUM(0x4000), 83 ACC_CONSTRUCTOR(0x10000); 84 85 private int value; 86 Flag(int value)87 private Flag(int value) { 88 this.value = value; 89 } 90 getValue()91 public int getValue() { 92 return value; 93 } 94 } 95 } 96