org.jf.dexlib2.dexbacked.CDexBackedMethodImplementation Maven / Gradle / Ivy
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package org.jf.dexlib2.dexbacked;
import javax.annotation.Nonnull;
import static org.jf.dexlib2.dexbacked.raw.CodeItem.*;
public class CDexBackedMethodImplementation extends DexBackedMethodImplementation {
public CDexBackedMethodImplementation(
@Nonnull DexBackedDexFile dexFile, @Nonnull DexBackedMethod method, int codeOffset) {
super(dexFile, method, codeOffset);
}
public int getInsCount() {
int insCount = (dexFile.getDataBuffer().readUshort(codeOffset) >> CDEX_INS_COUNT_SHIFT) & 0xf;
if ((getPreheaderFlags() & CDEX_PREHEADER_FLAG_INS_COUNT) != 0) {
int preheaderCount = 1;
if ((getPreheaderFlags() & CDEX_PREHEADER_FLAG_INSTRUCTIONS_SIZE) != 0) {
preheaderCount+=2;
}
if ((getPreheaderFlags() & CDEX_PREHEADER_FLAG_REGISTER_COUNT) != 0) {
preheaderCount++;
}
insCount += dexFile.getDataBuffer().readUshort(codeOffset - 2 * preheaderCount);
}
return insCount;
}
@Override
public int getRegisterCount() {
int registerCount = (dexFile.getDataBuffer().readUshort(codeOffset) >> CDEX_REGISTER_COUNT_SHIFT) & 0xf;
registerCount += getInsCount();
if ((getPreheaderFlags() & CDEX_PREHEADER_FLAG_REGISTER_COUNT) != 0) {
int preheaderCount = 1;
if ((getPreheaderFlags() & CDEX_PREHEADER_FLAG_INSTRUCTIONS_SIZE) > 0) {
preheaderCount += 2;
}
registerCount += dexFile.getDataBuffer().readUshort(codeOffset - 2 * preheaderCount);
}
return registerCount;
}
@Override
protected int getInstructionsSize() {
int instructionsSize = dexFile.getDataBuffer().readUshort(
codeOffset + CDEX_INSTRUCTIONS_SIZE_AND_PREHEADER_FLAGS_OFFSET) >>
CDEX_INSTRUCTIONS_SIZE_SHIFT;
if ((getPreheaderFlags() & CDEX_PREHEADER_FLAG_INSTRUCTIONS_SIZE) != 0) {
instructionsSize += dexFile.getDataBuffer().readUshort(codeOffset - 2);
instructionsSize += dexFile.getDataBuffer().readUshort(codeOffset - 4) << 16;
}
return instructionsSize;
}
@Override
protected int getInstructionsStartOffset() {
return codeOffset + 4;
}
private int getPreheaderFlags() {
return dexFile.getDataBuffer().readUshort(codeOffset + CDEX_INSTRUCTIONS_SIZE_AND_PREHEADER_FLAGS_OFFSET) &
CDEX_PREHEADER_FLAGS_MASK;
}
@Override
protected int getTriesSize() {
int triesCount = (dexFile.getDataBuffer().readUshort(codeOffset) >> CDEX_TRIES_SIZE_SHIFT) & 0xf;
if ((getPreheaderFlags() & CDEX_PREHEADER_FLAG_TRIES_COUNT) != 0) {
int preheaderCount = Integer.bitCount(getPreheaderFlags());
if ((getPreheaderFlags() & CDEX_PREHEADER_FLAG_INSTRUCTIONS_SIZE) != 0) {
// The instructions size preheader is 2 shorts
preheaderCount++;
}
triesCount += dexFile.getDataBuffer().readUshort(codeOffset - 2 * preheaderCount);
}
return triesCount;
}
@Override
protected int getDebugOffset() {
CDexBackedDexFile cdexFile = ((CDexBackedDexFile) dexFile);
int debugTableItemOffset = (method.methodIndex / 16) * 4;
int bitIndex = method.methodIndex % 16;
int debugInfoOffsetsPos = cdexFile.getDebugInfoOffsetsPos();
int debugTableOffset = debugInfoOffsetsPos + cdexFile.getDebugInfoOffsetsTableOffset();
int debugOffsetsOffset = cdexFile.getDataBuffer().readSmallUint(debugTableOffset + debugTableItemOffset);
DexReader reader = cdexFile.getDataBuffer().readerAt(debugInfoOffsetsPos + debugOffsetsOffset);
int bitMask = reader.readUbyte() << 8;
bitMask += reader.readUbyte();
if ((bitMask & (1 << bitIndex)) == 0) {
return 0;
}
int offsetCount = Integer.bitCount(bitMask & 0xFFFF >> (16-bitIndex));
int baseDebugOffset = cdexFile.getDebugInfoBase();
for (int i=0; i