internal string GetHandlerLabel(CatchHandler handler)
{
var label = string.Empty;
Handlers.TryGetValue(handler, out label);
return(label);
}
internal void AddHandler(CatchHandler handler, string labelPrefix, ref int counter)
{
var label = AddTarget(-1, handler.HandlerOffset, labelPrefix, ref counter);
Handlers.Add(handler, label);
}
internal Method(uint id, Dex dex, BinaryReader reader, uint codeOffset)
{
Id = id;
Dex = dex;
ClassIndex = reader.ReadUInt16();
PrototypeIndex = reader.ReadUInt16();
NameIndex = reader.ReadUInt32();
Annotations = new Annotation[0];
ParameterAnnotations = new List <Annotation>();
// This method has no opcodes, must be abstract or native.
// Or the method is being loaded directly from the methods list
if (codeOffset != 0)
{
reader.BaseStream.Position = codeOffset;
RegistersSize = reader.ReadUInt16();
ArgumentsSize = reader.ReadUInt16();
ReturnValuesSize = reader.ReadUInt16();
var numberOfTryItems = reader.ReadUInt16();
// Not parsing debug info
/*var debugInfoOffset =*/ reader.ReadUInt32();
CodeLength = reader.ReadUInt32();
CodeOffset = reader.BaseStream.Position;
// Skip the opcode block
reader.BaseStream.Position += CodeLength * 2;
// Skip the optional padding
if ((numberOfTryItems != 0) && (CodeLength % 2 != 0))
{
reader.BaseStream.Position += 2;
}
// Load the try blocks
if (numberOfTryItems != 0)
{
TryCatchBlocks = new TryCatchBlock[numberOfTryItems];
var handlerOffsets = new long[numberOfTryItems];
// read Try
for (int i = 0; i < numberOfTryItems; i++)
{
var tryCatch = new TryCatchBlock(CodeOffset);
tryCatch.StartAddress = reader.ReadUInt32();
tryCatch.InstructionCount = reader.ReadUInt16();
TryCatchBlocks [i] = tryCatch;
handlerOffsets[i] = reader.ReadUInt16();
}
var encodedCatchHandlerListOffset = reader.BaseStream.Position;
// Size of the list, could be used to confirm the DEX is properly
// built. For this purpose will assume DEX files are always good
Leb128.ReadUleb(reader);
// read Catch blocks
for (int i = 0; i < numberOfTryItems; i++)
{
//encoded_catch_handler
if (handlerOffsets [i] > 0)
{
reader.BaseStream.Position = encodedCatchHandlerListOffset + handlerOffsets [i];
var handlersCount = Leb128.ReadLeb(reader);
var handlers = new CatchHandler[handlersCount <= 0 ? Math.Abs(handlersCount) + 1 : handlersCount];
for (int j = 0; j < Math.Abs(handlersCount); j++)
{
var catchHandler = new CatchHandler(CodeOffset);
catchHandler.TypeIndex = Leb128.ReadUleb(reader);
catchHandler.Address = Leb128.ReadUleb(reader);
handlers [j] = catchHandler;
}
// parse the catch all block
if (handlersCount <= 0)
{
var catchHandler = new CatchHandler(CodeOffset);
catchHandler.TypeIndex = 0;
catchHandler.Address = Leb128.ReadUleb(reader);
handlers [handlers.Length - 1] = catchHandler;
}
TryCatchBlocks [i].Handlers = handlers;
}
}
}
}
}
