| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * 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.android.dx.io; |
| |
| import com.android.dx.dex.DexException; |
| import com.android.dx.dex.SizeOf; |
| import com.android.dx.dex.TableOfContents; |
| import com.android.dx.util.Leb128Utils; |
| import com.android.dx.util.Mutf8; |
| import java.io.ByteArrayOutputStream; |
| import java.io.DataInput; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.util.AbstractList; |
| import java.util.Arrays; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.NoSuchElementException; |
| |
| /** |
| * The bytes of a dex file in memory for reading and writing. All int offsets |
| * are unsigned. |
| */ |
| public final class DexBuffer { |
| private byte[] data; |
| private final TableOfContents tableOfContents = new TableOfContents(); |
| private int length; |
| |
| private final List<String> strings = new AbstractList<String>() { |
| @Override public String get(int index) { |
| checkBounds(index, tableOfContents.stringIds.size); |
| int offset = open(tableOfContents.stringIds.off + (index * SizeOf.STRING_ID_ITEM)) |
| .readInt(); |
| return open(offset).readStringDataItem(); |
| } |
| @Override public int size() { |
| return tableOfContents.stringIds.size; |
| } |
| }; |
| |
| private final List<Integer> typeIds = new AbstractList<Integer>() { |
| @Override public Integer get(int index) { |
| checkBounds(index, tableOfContents.typeIds.size); |
| return open(tableOfContents.typeIds.off + (index * SizeOf.TYPE_ID_ITEM)).readInt(); |
| } |
| @Override public int size() { |
| return tableOfContents.typeIds.size; |
| } |
| }; |
| |
| private final List<String> typeNames = new AbstractList<String>() { |
| @Override public String get(int index) { |
| checkBounds(index, tableOfContents.typeIds.size); |
| return strings.get(typeIds.get(index)); |
| } |
| @Override public int size() { |
| return tableOfContents.typeIds.size; |
| } |
| }; |
| |
| private final List<ProtoId> protoIds = new AbstractList<ProtoId>() { |
| @Override public ProtoId get(int index) { |
| checkBounds(index, tableOfContents.protoIds.size); |
| return open(tableOfContents.protoIds.off + (SizeOf.PROTO_ID_ITEM * index)) |
| .readProtoId(); |
| } |
| @Override public int size() { |
| return tableOfContents.protoIds.size; |
| } |
| }; |
| |
| private final List<FieldId> fieldIds = new AbstractList<FieldId>() { |
| @Override public FieldId get(int index) { |
| checkBounds(index, tableOfContents.fieldIds.size); |
| return open(tableOfContents.fieldIds.off + (SizeOf.MEMBER_ID_ITEM * index)) |
| .readFieldId(); |
| } |
| @Override public int size() { |
| return tableOfContents.fieldIds.size; |
| } |
| }; |
| |
| private final List<MethodId> methodIds = new AbstractList<MethodId>() { |
| @Override public MethodId get(int index) { |
| checkBounds(index, tableOfContents.methodIds.size); |
| return open(tableOfContents.methodIds.off + (SizeOf.MEMBER_ID_ITEM * index)) |
| .readMethodId(); |
| } |
| @Override public int size() { |
| return tableOfContents.methodIds.size; |
| } |
| }; |
| |
| private static void checkBounds(int index, int length) { |
| if (index < 0 || index >= length) { |
| throw new IndexOutOfBoundsException("index:" + index + ", length=" + length); |
| } |
| } |
| |
| public void loadFrom(InputStream in) throws IOException { |
| ByteArrayOutputStream bytesOut = new ByteArrayOutputStream(); |
| byte[] buffer = new byte[8192]; |
| |
| int count; |
| while ((count = in.read(buffer)) != -1) { |
| bytesOut.write(buffer, 0, count); |
| } |
| |
| this.data = bytesOut.toByteArray(); |
| tableOfContents.readFrom(this); |
| } |
| |
| public void loadFrom(File file) throws IOException { |
| InputStream in = new FileInputStream(file); |
| loadFrom(in); |
| in.close(); |
| } |
| |
| public void writeTo(OutputStream out) throws IOException { |
| out.write(data); |
| } |
| |
| public void writeTo(File dexOut) throws IOException { |
| OutputStream out = new FileOutputStream(dexOut); |
| writeTo(out); |
| out.close(); |
| } |
| |
| public TableOfContents getTableOfContents() { |
| return tableOfContents; |
| } |
| |
| public Section open(int position) { |
| return new Section(position); |
| } |
| |
| public Section appendSection(int maxByteCount, String name) { |
| Section result = new Section(name, length, length + maxByteCount); |
| length = fourByteAlign(length + maxByteCount); |
| return result; |
| } |
| |
| public void noMoreSections() { |
| data = new byte[length]; |
| } |
| |
| public int getLength() { |
| return length; |
| } |
| |
| private static int fourByteAlign(int position) { |
| return (position + 3) & ~3; |
| } |
| |
| public byte[] getBytes() { |
| return data; |
| } |
| |
| public List<String> strings() { |
| return strings; |
| } |
| |
| public List<Integer> typeIds() { |
| return typeIds; |
| } |
| |
| public List<String> typeNames() { |
| return typeNames; |
| } |
| |
| public List<ProtoId> protoIds() { |
| return protoIds; |
| } |
| |
| public List<FieldId> fieldIds() { |
| return fieldIds; |
| } |
| |
| public List<MethodId> methodIds() { |
| return methodIds; |
| } |
| |
| public Iterable<ClassDef> classDefs() { |
| return new Iterable<ClassDef>() { |
| public Iterator<ClassDef> iterator() { |
| return new Iterator<ClassDef>() { |
| private DexBuffer.Section in = open(tableOfContents.classDefs.off); |
| private int count = 0; |
| |
| public boolean hasNext() { |
| return count < tableOfContents.classDefs.size; |
| } |
| public ClassDef next() { |
| if (!hasNext()) { |
| throw new NoSuchElementException(); |
| } |
| count++; |
| return in.readClassDef(); |
| } |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| }; |
| } |
| }; |
| } |
| |
| public ClassData readClassData(ClassDef classDef) { |
| int offset = classDef.getClassDataOffset(); |
| if (offset == 0) { |
| throw new IllegalArgumentException("offset == 0"); |
| } |
| return open(offset).readClassData(); |
| } |
| |
| public Code readCode(ClassData.Method method) { |
| int offset = method.getCodeOffset(); |
| if (offset == 0) { |
| throw new IllegalArgumentException("offset == 0"); |
| } |
| return open(offset).readCode(); |
| } |
| |
| public final class Section { |
| private final String name; |
| private int position; |
| private final int limit; |
| |
| private final DataInput asDataInput = new DataInputStub() { |
| public byte readByte() { |
| return Section.this.readByte(); |
| } |
| }; |
| |
| private Section(String name, int position, int limit) { |
| this.name = name; |
| this.position = position; |
| this.limit = limit; |
| } |
| |
| private Section(int position) { |
| this("section", position, data.length); |
| } |
| |
| public int getPosition() { |
| return position; |
| } |
| |
| public int readInt() { |
| int result = (data[position] & 0xff) |
| | (data[position + 1] & 0xff) << 8 |
| | (data[position + 2] & 0xff) << 16 |
| | (data[position + 3] & 0xff) << 24; |
| position += 4; |
| return result; |
| } |
| |
| public short readShort() { |
| int result = (data[position] & 0xff) |
| | (data[position + 1] & 0xff) << 8; |
| position += 2; |
| return (short) result; |
| } |
| |
| public byte readByte() { |
| return (byte) (data[position++] & 0xff); |
| } |
| |
| public byte[] readByteArray(int length) { |
| byte[] result = Arrays.copyOfRange(data, position, position + length); |
| position += length; |
| return result; |
| } |
| |
| public short[] readShortArray(int length) { |
| short[] result = new short[length]; |
| for (int i = 0; i < length; i++) { |
| result[i] = readShort(); |
| } |
| return result; |
| } |
| |
| public int readUleb128() { |
| try { |
| return Leb128Utils.readUnsignedLeb128(asDataInput); |
| } catch (IOException e) { |
| throw new DexException(e); |
| } |
| } |
| |
| public int readSleb128() { |
| try { |
| return Leb128Utils.readSignedLeb128(asDataInput); |
| } catch (IOException e) { |
| throw new DexException(e); |
| } |
| } |
| |
| public short[] readTypeList(int offset) { |
| if (offset == 0) { |
| return new short[0]; |
| } |
| int savedPosition = position; |
| position = offset; |
| int size = readInt(); |
| short[] parameters = new short[size]; |
| for (int i = 0; i < size; i++) { |
| parameters[i] = readShort(); |
| } |
| position = savedPosition; |
| return parameters; |
| } |
| |
| public String readStringDataItem() { |
| try { |
| int expectedLength = readUleb128(); |
| String result = Mutf8.decode(asDataInput, new char[expectedLength]); |
| if (result.length() != expectedLength) { |
| throw new DexException("Declared length " + expectedLength |
| + " doesn't match decoded length of " + result.length()); |
| } |
| return result; |
| } catch (IOException e) { |
| throw new DexException(e); |
| } |
| } |
| |
| public FieldId readFieldId() { |
| short declaringClassIndex = readShort(); |
| short typeIndex = readShort(); |
| int nameIndex = readInt(); |
| return new FieldId(DexBuffer.this, declaringClassIndex, typeIndex, nameIndex); |
| } |
| |
| public MethodId readMethodId() { |
| short declaringClassIndex = readShort(); |
| short protoIndex = readShort(); |
| int nameIndex = readInt(); |
| return new MethodId(DexBuffer.this, declaringClassIndex, protoIndex, nameIndex); |
| } |
| |
| public ProtoId readProtoId() { |
| int shortyIndex = readInt(); |
| int returnTypeIndex = readInt(); |
| int parametersOff = readInt(); |
| short[] parameters = readTypeList(parametersOff); |
| return new ProtoId(DexBuffer.this, shortyIndex, returnTypeIndex, parameters); |
| } |
| |
| public ClassDef readClassDef() { |
| int offset = getPosition(); |
| int type = readInt(); |
| int accessFlags = readInt(); |
| int supertype = readInt(); |
| int interfacesOffset = readInt(); |
| short[] interfaces = readTypeList(interfacesOffset); |
| int sourceFileIndex = readInt(); |
| int annotationsOffset = readInt(); |
| int classDataOffset = readInt(); |
| int staticValuesOffset = readInt(); |
| return new ClassDef(DexBuffer.this, offset, type, accessFlags, supertype, |
| interfacesOffset, interfaces, sourceFileIndex, annotationsOffset, |
| classDataOffset, staticValuesOffset); |
| } |
| |
| private Code readCode() { |
| short registersSize = readShort(); |
| short insSize = readShort(); |
| short outsSize = readShort(); |
| short triesSize = readShort(); |
| int debugInfoOffset = readInt(); |
| int instructionsSize = readInt(); |
| short[] instructions = readShortArray(instructionsSize); |
| Code.Try[] tries = new Code.Try[triesSize]; |
| Code.CatchHandler[] catchHandlers = new Code.CatchHandler[0]; |
| if (triesSize > 0) { |
| if (instructions.length % 2 == 1) { |
| readShort(); // padding |
| } |
| |
| for (int i = 0; i < triesSize; i++) { |
| int startAddress = readInt(); |
| short instructionCount = readShort(); |
| short handlerOffset = readShort(); |
| tries[i] = new Code.Try(startAddress, instructionCount, handlerOffset); |
| } |
| |
| int catchHandlersSize = readUleb128(); |
| catchHandlers = new Code.CatchHandler[catchHandlersSize]; |
| for (int i = 0; i < catchHandlersSize; i++) { |
| catchHandlers[i] = readCatchHandler(); |
| } |
| } |
| return new Code(registersSize, insSize, outsSize, debugInfoOffset, instructions, |
| tries, catchHandlers); |
| } |
| |
| private Code.CatchHandler readCatchHandler() { |
| int size = readSleb128(); |
| int handlersCount = Math.abs(size); |
| int[] typeIndexes = new int[handlersCount]; |
| int[] addresses = new int[handlersCount]; |
| for (int i = 0; i < handlersCount; i++) { |
| typeIndexes[i] = readUleb128(); |
| addresses[i] = readUleb128(); |
| } |
| int catchAllAddress = size <= 0 ? readUleb128() : -1; |
| return new Code.CatchHandler(typeIndexes, addresses, catchAllAddress); |
| } |
| |
| private ClassData readClassData() { |
| int staticFieldsSize = readUleb128(); |
| int instanceFieldsSize = readUleb128(); |
| int directMethodsSize = readUleb128(); |
| int virtualMethodsSize = readUleb128(); |
| ClassData.Field[] staticFields = readFields(staticFieldsSize); |
| ClassData.Field[] instanceFields = readFields(instanceFieldsSize); |
| ClassData.Method[] directMethods = readMethods(directMethodsSize); |
| ClassData.Method[] virtualMethods = readMethods(virtualMethodsSize); |
| return new ClassData(staticFields, instanceFields, directMethods, virtualMethods); |
| } |
| |
| private ClassData.Field[] readFields(int count) { |
| ClassData.Field[] result = new ClassData.Field[count]; |
| int fieldIndex = 0; |
| for (int i = 0; i < count; i++) { |
| fieldIndex += readUleb128(); // field index diff |
| int accessFlags = readUleb128(); |
| result[i] = new ClassData.Field(fieldIndex, accessFlags); |
| } |
| return result; |
| } |
| |
| private ClassData.Method[] readMethods(int count) { |
| ClassData.Method[] result = new ClassData.Method[count]; |
| int methodIndex = 0; |
| for (int i = 0; i < count; i++) { |
| methodIndex += readUleb128(); // method index diff |
| int accessFlags = readUleb128(); |
| int codeOff = readUleb128(); |
| result[i] = new ClassData.Method(methodIndex, accessFlags, codeOff); |
| } |
| return result; |
| } |
| |
| private void checkPosition() { |
| if (position > limit) { |
| throw new DexException("Section limit " + limit + " exceeded by " + name); |
| } |
| } |
| |
| /** |
| * Writes 0x00 until the position is aligned to a multiple of 4. |
| */ |
| public void alignToFourBytes() { |
| int unalignedCount = position; |
| position = DexBuffer.fourByteAlign(position); |
| for (int i = unalignedCount; i < position; i++) { |
| data[i] = 0; |
| } |
| } |
| |
| public void assertFourByteAligned() { |
| if ((position & 3) != 0) { |
| throw new IllegalStateException("Not four byte aligned!"); |
| } |
| } |
| |
| public void write(byte[] bytes) { |
| System.arraycopy(bytes, 0, data, position, bytes.length); |
| position += bytes.length; |
| checkPosition(); |
| } |
| |
| public void writeByte(int b) { |
| data[position++] = (byte) b; |
| checkPosition(); |
| } |
| |
| public void writeShort(short i) { |
| data[position ] = (byte) i; |
| data[position + 1] = (byte) (i >>> 8); |
| position += 2; |
| checkPosition(); |
| } |
| |
| public void write(short[] shorts) { |
| for (short s : shorts) { |
| writeShort(s); |
| } |
| } |
| |
| public void writeInt(int i) { |
| data[position ] = (byte) i; |
| data[position + 1] = (byte) (i >>> 8); |
| data[position + 2] = (byte) (i >>> 16); |
| data[position + 3] = (byte) (i >>> 24); |
| position += 4; |
| checkPosition(); |
| } |
| |
| public void writeUleb128(int i) { |
| position += Leb128Utils.writeUnsignedLeb128(data, position, i); |
| checkPosition(); |
| } |
| |
| public void writeSleb128(int i) { |
| position += Leb128Utils.writeSignedLeb128(data, position, i); |
| checkPosition(); |
| } |
| |
| public void writeStringData(String value) { |
| try { |
| int length = value.length(); |
| writeUleb128(length); |
| write(Mutf8.encode(value)); |
| writeByte(0); |
| } catch (IOException e) { |
| throw new AssertionError(); |
| } |
| } |
| } |
| |
| private static class DataInputStub implements DataInput { |
| public byte readByte() throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| public void readFully(byte[] buffer) throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| public void readFully(byte[] buffer, int offset, int count) throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| public int skipBytes(int i) throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| public boolean readBoolean() throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| public int readUnsignedByte() throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| public short readShort() throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| public int readUnsignedShort() throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| public char readChar() throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| public int readInt() throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| public long readLong() throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| public float readFloat() throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| public double readDouble() throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| public String readLine() throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| public String readUTF() throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| } |
| } |