blob: c75667aad4d79c85f3d8ac834dccf33ae0f7f9c0 [file] [log] [blame]
// Copyright (c) 2017, 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.dex;
import static com.android.tools.r8.dex.Constants.VDEX_NUMBER_OF_DEX_FILES_OFFSET;
import com.android.tools.r8.errors.CompilationError;
import com.google.common.collect.ImmutableList;
import java.util.ArrayList;
import java.util.List;
/**
* Parse a VDEX and isolate the different dex files it contains.
*/
public class VDexParser {
private VDexReader vDexReader;
private List<byte[]> dexFiles = new ArrayList<>();
public void close() {
vDexReader = null;
dexFiles = ImmutableList.of();
}
public VDexParser(VDexReader vDexReader) {
this.vDexReader = vDexReader;
vDexReader.setByteOrder();
parseDexFiles();
}
public List<byte[]> getDexFiles() {
return dexFiles;
}
private void parseDexFiles() {
vDexReader.position(VDEX_NUMBER_OF_DEX_FILES_OFFSET);
int numberOfDexFiles = vDexReader.getUint();
int dexSize = vDexReader.getUint();
int verifierDepsSize = vDexReader.getUint();
int quickeningInfoSize = vDexReader.getUint();
int offset = VDexReader.firstDexOffset(numberOfDexFiles);
int totalDexSize = 0;
for (int i = 0; i < numberOfDexFiles; i++) {
int size = vDexReader.getUint(offset + Constants.FILE_SIZE_OFFSET);
vDexReader.position(offset);
dexFiles.add(vDexReader.getByteArray(size));
totalDexSize += size;
offset += size;
}
if (totalDexSize != dexSize) {
throw new CompilationError("Invalid vdex file. Mismatch in total dex files size");
}
}
}