/// <summary>Build source code for a single method.</summary>
/// <param name="method"></param>
/// <returns></returns>
private string BuildSourceCode(IMethod method, AstNode methodRootNode,
Dictionary<string, string> namespaceByImportedType)
{
byte[] byteCode = method.GetByteCode();
if (null == byteCode) { return ""; }
StringBuilder resultBuilder = new StringBuilder();
int opCodeIndex = 0;
SortedList<uint, uint> exclusions = new SortedList<uint, uint>();
GenerateMethodHeader(method, resultBuilder, namespaceByImportedType);
throw new NotImplementedException();
//SourceCodeWalkerContext sourceCodeWalkerContext = new SourceCodeWalkerContext(resultBuilder);
//methodRootNode.Walk(SourceCodeWalker, WalkMode.TransitBeforeAndAfter,
// sourceCodeWalkerContext);
//foreach(InstructionAstNode scannedNode in methodRootNode.WalkLeaf<InstructionAstNode>()) {
// resultBuilder.AppendLine(scannedNode.AssemblyCode);
//}
//IEnumerator<ITryBlock> tryBlocksEnumerator = method.EnumerateTryBlocks().GetEnumerator();
//ITryBlock nextGuardedBlock =
// tryBlocksEnumerator.MoveNext() ? tryBlocksEnumerator.Current : null;
//Stack<ITryBlock> partialTryBlocks = new Stack<ITryBlock>();
//while (byteCode.Length > opCodeIndex)
//{
// // Check for next guarded block beginning.
// while ((null != nextGuardedBlock)
// && ((sizeof(ushort) * nextGuardedBlock.StartAddress) == opCodeIndex))
// {
// // The current block is starting at current decoder position.
// resultBuilder.Append("try { \n");
// partialTryBlocks.Push(nextGuardedBlock);
// // Acquire next guarded block if any and loop again. This is because this
// // new guarded block may share the same start offset than the one we just
// // handled.
// nextGuardedBlock =
// tryBlocksEnumerator.MoveNext() ? tryBlocksEnumerator.Current : null;
// }
// // Decode current instruction.
// resultBuilder.Append(OpCodeDecoder.Decode(null, byteCode, method.ByteCodeRawAddress,
// _objectResolver, exclusions, ref opCodeIndex));
// // Handle partial guarded block termination.
// while (true)
// {
// if (0 == partialTryBlocks.Count) { break; }
// ITryBlock nextClosingBlock = partialTryBlocks.Peek();
// int lastCoveredOpCodeIndex = (int)(sizeof(ushort) *
// (nextClosingBlock.StartAddress + nextClosingBlock.InstructionsCount - 1));
// if (lastCoveredOpCodeIndex >= opCodeIndex) { break; }
// // This test for code robustness. Should never be true.
// if (lastCoveredOpCodeIndex != (opCodeIndex - sizeof(ushort)))
// {
// throw new ApplicationException();
// }
// // Current block terminates here.
// nextClosingBlock = partialTryBlocks.Pop();
// }
//}
//if (0 != partialTryBlocks.Count) { throw new REException(); }
//if (byteCode.Length != opCodeIndex) { throw new REException(); }
//if (0 < exclusions.Count) { throw new REException(); }
resultBuilder.Append("}");
return resultBuilder.ToString();
}
/// <summary>Decode instructions for the given method.</summary>
/// <param name="method">The method to be decoded.</param>
/// <param name="objectResolver">An implementation of an object resolver to be
/// used for retrieving classes and constant strings referenced from the bytecode.
/// </param>
/// <returns>An array indexed by the offset within method byte code and storing
/// the instruction starting at this offset (if any).</returns>
private static DalvikInstruction[] BuildInstructionList(IMethod method,
IResolver objectResolver)
{
DalvikInstruction[] result = new DalvikInstruction[method.ByteCodeSize];
byte[] byteCode = method.GetByteCode();
List<uint> pendingInstructionsOffset = new List<uint>();
// Add entry point.
pendingInstructionsOffset.Add(0);
// As well as catch blocks from the exception because they aren't
// referenced from normal code.
foreach (ITryBlock tryBlock in method.EnumerateTryBlocks()) {
foreach (IGuardHandler handler in tryBlock.EnumerateHandlers()) {
uint addedOffset = handler.HandlerMethodOffset;
// For debugging purpose. Should never occur.
if (addedOffset >= byteCode.Length) { throw new ApplicationException(); }
pendingInstructionsOffset.Add(addedOffset);
}
}
Console.WriteLine(
"Decoding '{0}' method bytecode on {1} bytes starting at 0x{2:X8}.",
Helpers.BuildMethodDeclarationString(method), byteCode.Length,
method.ByteCodeRawAddress);
while (0 < pendingInstructionsOffset.Count) {
uint opCodeIndex = pendingInstructionsOffset[0];
pendingInstructionsOffset.RemoveAt(0);
bool fallInSequence = true;
while (fallInSequence) {
// Avoid targeting twice a single instruction.
if (null != result[opCodeIndex]) { break; }
DalvikInstruction newNode = OpCodeDecoder.Decode(byteCode,
method.ByteCodeRawAddress, objectResolver, result,
ref opCodeIndex);
// Analyse possible targets after this instruction and augment
// pending instructions list accordingly.
fallInSequence = newNode.ContinueInSequence;
uint[] otherTargetMethodOffsets = newNode.AdditionalTargetMethodOffsets;
if (null != otherTargetMethodOffsets) {
for(int index = 0; index < otherTargetMethodOffsets.Length; index++) {
uint targetOffset = otherTargetMethodOffsets[index];
if (targetOffset >= byteCode.Length) { throw new ApplicationException(); }
if (!pendingInstructionsOffset.Contains(targetOffset)
&& (null == result[targetOffset])) {
pendingInstructionsOffset.Add(targetOffset);
}
}
}
}
}
return result;
}
