private void ReadMethodBody(BinaryReader reader, MethodDefinition mdef, uint codeOffset)
{
reader.PreserveCurrentPosition(codeOffset, () =>
{
var registersSize = reader.ReadUInt16();
var incomingArgsSize = reader.ReadUInt16();
var outgoingArgsSize = reader.ReadUInt16();
var triesSize = reader.ReadUInt16();
var debugOffset = reader.ReadUInt32();
mdef.Body = new MethodBody(mdef, registersSize)
{
IncomingArguments = incomingArgsSize, OutgoingArguments = outgoingArgsSize
};
var ireader = new InstructionReader(Dex, mdef);
ireader.ReadFrom(reader);
if ((triesSize != 0) && (ireader.Codes.Length % 2 != 0))
{
reader.ReadUInt16(); // padding (4-byte alignment)
}
if (triesSize != 0)
{
ReadExceptionHandlers(reader, mdef, ireader, triesSize);
}
if (debugOffset != 0)
{
ReadDebugInfo(reader, mdef, debugOffset);
}
});
}
private void ReadMethodBody(BinaryReader reader, MethodDefinition mdef, uint codeOffset)
{
reader.PreserveCurrentPosition(codeOffset, () =>
{
var registersSize = reader.ReadUInt16();
var incomingArgsSize = reader.ReadUInt16();
var outgoingArgsSize = reader.ReadUInt16();
var triesSize = reader.ReadUInt16();
var debugOffset = reader.ReadUInt32();
mdef.Body = new MethodBody(mdef, registersSize)
{
IncomingArguments = incomingArgsSize,
OutgoingArguments = outgoingArgsSize
};
var ireader = new InstructionReader(Dex, mdef);
ireader.ReadFrom(reader);
if ((triesSize != 0) && (ireader.Codes.Length % 2 != 0))
reader.ReadUInt16(); // padding (4-byte alignment)
if (triesSize != 0)
ReadExceptionHandlers(reader, mdef, ireader, triesSize);
if (debugOffset != 0)
ReadDebugInfo(reader, mdef, debugOffset);
});
}
private void ReadExceptionHandlers(BinaryReader reader, MethodDefinition mdef, InstructionReader instructionReader, ushort triesSize)
{
var exceptionLookup = new Dictionary<uint, List<ExceptionHandler>>();
for (var i = 0; i < triesSize; i++)
{
var startOffset = reader.ReadUInt32();
var insCount = reader.ReadUInt16();
var endOffset = startOffset + insCount - 1;
uint handlerOffset = reader.ReadUInt16();
var ehandler = new ExceptionHandler();
mdef.Body.Exceptions.Add(ehandler);
if (!exceptionLookup.ContainsKey(handlerOffset))
{
exceptionLookup.Add(handlerOffset, new List<ExceptionHandler>());
}
exceptionLookup[handlerOffset].Add(ehandler);
ehandler.TryStart = instructionReader.Lookup[(int)startOffset];
// The last code unit covered (inclusive) is start_addr + insn_count - 1
ehandler.TryEnd = instructionReader.LookupLast[(int)endOffset];
}
var baseOffset = reader.BaseStream.Position;
var catchHandlersSize = reader.ReadULEB128();
for (var i = 0; i < catchHandlersSize; i++)
{
var itemoffset = reader.BaseStream.Position - baseOffset;
var catchTypes = reader.ReadSLEB128();
var catchAllPresent = catchTypes <= 0;
catchTypes = Math.Abs(catchTypes);
for (var j = 0; j < catchTypes; j++)
{
var typeIndex = reader.ReadULEB128();
var offset = reader.ReadULEB128();
var @catch = new Catch
{
Type = Dex.TypeReferences[(int) typeIndex],
Instruction = instructionReader.Lookup[(int) offset]
};
// As catch handler can be used in several tries, let's clone the catch
foreach (var ehandler in exceptionLookup[(uint)itemoffset])
ehandler.Catches.Add(@catch.Clone());
}
if (!catchAllPresent)
continue;
var caOffset = reader.ReadULEB128();
foreach (var ehandler in exceptionLookup[(uint)itemoffset])
ehandler.CatchAll = instructionReader.Lookup[(int)caOffset];
}
}
private void ReadExceptionHandlers(BinaryReader reader, MethodDefinition mdef, InstructionReader instructionReader, ushort triesSize)
{
var exceptionLookup = new Dictionary <uint, List <ExceptionHandler> >();
for (var i = 0; i < triesSize; i++)
{
var startOffset = reader.ReadUInt32();
var insCount = reader.ReadUInt16();
var endOffset = startOffset + insCount - 1;
uint handlerOffset = reader.ReadUInt16();
var ehandler = new ExceptionHandler();
mdef.Body.Exceptions.Add(ehandler);
if (!exceptionLookup.ContainsKey(handlerOffset))
{
exceptionLookup.Add(handlerOffset, new List <ExceptionHandler>());
}
exceptionLookup[handlerOffset].Add(ehandler);
ehandler.TryStart = instructionReader.Lookup[(int)startOffset];
// The last code unit covered (inclusive) is start_addr + insn_count - 1
ehandler.TryEnd = instructionReader.LookupLast[(int)endOffset];
}
var baseOffset = reader.BaseStream.Position;
var catchHandlersSize = reader.ReadULEB128();
for (var i = 0; i < catchHandlersSize; i++)
{
var itemoffset = reader.BaseStream.Position - baseOffset;
var catchTypes = reader.ReadSLEB128();
var catchAllPresent = catchTypes <= 0;
catchTypes = Math.Abs(catchTypes);
for (var j = 0; j < catchTypes; j++)
{
var typeIndex = reader.ReadULEB128();
var offset = reader.ReadULEB128();
var @catch = new Catch {
Type = Dex.TypeReferences[(int)typeIndex], Instruction = instructionReader.Lookup[(int)offset]
};
// As catch handler can be used in several tries, let's clone the catch
foreach (var ehandler in exceptionLookup[(uint)itemoffset])
{
ehandler.Catches.Add(@catch.Clone());
}
}
if (!catchAllPresent)
{
continue;
}
var caOffset = reader.ReadULEB128();
foreach (var ehandler in exceptionLookup[(uint)itemoffset])
{
ehandler.CatchAll = instructionReader.Lookup[(int)caOffset];
}
}
}
