public static uint GetStackCountForLocal(_MethodInfo aMethod, Type aField)
{
var xSize = SizeOfType(aField);
var xResult = xSize / 4;
if (xSize % 4 != 0)
{
xResult++;
}
return(xResult);
}
public static uint GetEBPOffsetForLocal(_MethodInfo aMethod, int localIndex)
{
var xLocalInfos = aMethod.MethodBase.GetLocalVariables();
uint xOffset = 4;
for (int i = 0; i < xLocalInfos.Count; i++)
{
if (i == localIndex)
{
break;
}
var xField = xLocalInfos[i];
xOffset += GetStackCountForLocal(aMethod, xField.Type) * 4;
}
return(xOffset);
}
public _MethodInfo(MethodBase aMethodBase, UInt32 aUID, TypeEnum aType, _MethodInfo aPlugMethod, bool isInlineAssembler)
{
MethodBase = aMethodBase;
UID = aUID;
Type = aType;
PlugMethod = aPlugMethod;
IsInlineAssembler = isInlineAssembler;
var attribs = aMethodBase.GetCustomAttributes <DebugStub>(false).ToList();
if (attribs.Any())
{
DebugStub attrib = new DebugStub
{
Off = attribs[0].Off,
};
DebugStubOff = attrib.Off;
}
}
public _MethodInfo(MethodBase aMethodBase, UInt32 aUID, TypeEnum aType, _MethodInfo aPlugMethod, Type aMethodAssembler) : this(aMethodBase, aUID, aType, aPlugMethod, false)
{
MethodAssembler = aMethodAssembler;
}
protected static void Jump_End(_MethodInfo aMethod)
{
XS.Jump(GetLabel(aMethod) + AppAssembler.EndOfMethodLabelNameNormal);
}
protected static void Jump_Exception(_MethodInfo aMethod)
{
// todo: port to numeric labels
XS.Jump(GetLabel(aMethod) + AppAssembler.EndOfMethodLabelNameException);
}
public static string GetLabel(_MethodInfo aMethod, int aPos)
{
return(LabelName.Get(GetLabel(aMethod), aPos));
}
public static string GetLabel(_MethodInfo aMethod, ILOpCode aOpCode)
{
return(GetLabel(aMethod, aOpCode.Position));
}
public static void EmitExceptionLogic(Assembler.Assembler aAssembler, _MethodInfo aMethodInfo, ILOpCode aCurrentOpCode, bool aDoTest, Action aCleanup, string aJumpTargetNoException = null)
{
if (aJumpTargetNoException == null)
{
aJumpTargetNoException = GetLabel(aMethodInfo, aCurrentOpCode.NextPosition);
}
string xJumpTo = null;
if (aCurrentOpCode != null && aCurrentOpCode.CurrentExceptionRegion != null)
{
// todo add support for nested handlers, see comment in Engine.cs
//if (!((aMethodInfo.CurrentHandler.HandlerOffset < aCurrentOpOffset) || (aMethodInfo.CurrentHandler.HandlerLength + aMethodInfo.CurrentHandler.HandlerOffset) <= aCurrentOpOffset)) {
XS.Comment(String.Format("CurrentOffset = {0}, HandlerStartOffset = {1}", aCurrentOpCode.Position,
aCurrentOpCode.CurrentExceptionRegion.HandlerOffset));
if (aCurrentOpCode.CurrentExceptionRegion.HandlerOffset > aCurrentOpCode.Position)
{
switch (aCurrentOpCode.CurrentExceptionRegion.Kind)
{
case ExceptionRegionKind.Catch:
{
xJumpTo = GetLabel(aMethodInfo, aCurrentOpCode.CurrentExceptionRegion.HandlerOffset);
break;
}
case ExceptionRegionKind.Finally:
{
xJumpTo = GetLabel(aMethodInfo, aCurrentOpCode.CurrentExceptionRegion.HandlerOffset);
break;
}
default:
{
throw new Exception("ExceptionHandlerType '" + aCurrentOpCode.CurrentExceptionRegion.Kind.ToString() +
"' not supported yet!");
}
}
}
}
// if aDoTest is true, we check ECX for exception flags
if (!aDoTest)
{
//new CPU.Call("_CODE_REQUESTED_BREAK_");
if (xJumpTo == null)
{
Jump_Exception(aMethodInfo);
}
else
{
XS.Jump(xJumpTo);
}
}
else
{
XS.Test(XSRegisters.ECX, 2);
if (aCleanup != null)
{
XS.Jump(CPU.ConditionalTestEnum.Equal, aJumpTargetNoException);
aCleanup();
if (xJumpTo == null)
{
XS.Jump(CPU.ConditionalTestEnum.NotEqual, GetLabel(aMethodInfo) + AppAssembler.EndOfMethodLabelNameException);
}
else
{
XS.Jump(CPU.ConditionalTestEnum.NotEqual, xJumpTo);
}
}
else
{
if (xJumpTo == null)
{
XS.Jump(CPU.ConditionalTestEnum.NotEqual, GetLabel(aMethodInfo) + AppAssembler.EndOfMethodLabelNameException);
}
else
{
XS.Jump(CPU.ConditionalTestEnum.NotEqual, xJumpTo);
}
}
}
}
// This is called execute and not assemble, as the scanner // could be used for other things, profiling, analysis, reporting, etc public abstract void Execute(_MethodInfo aMethod, ILOpCode aOpCode);
protected void Assemble()
{
foreach (var xItem in mItems)
{
if (xItem is MethodBase xMethod)
{
var xParams = xMethod.GetParameters();
var xParamTypes = xParams.Select(q => q.ParameterType).ToArray();
var xPlug = mPlugManager.ResolvePlug(xMethod, xParamTypes);
var xMethodType = _MethodInfo.TypeEnum.Normal;
Type xPlugAssembler = null;
_MethodInfo xPlugInfo = null;
var xMethodInline = xMethod.GetCustomAttribute <InlineAttribute>();
if (xMethodInline != null)
{
// inline assembler, shouldn't come here..
continue;
}
var xMethodIdMethod = mItemsList.IndexOf(xMethod);
if (xMethodIdMethod == -1)
{
throw new Exception("Method not in scanner list!");
}
PlugMethod xPlugAttrib = null;
if (xPlug != null)
{
xMethodType = _MethodInfo.TypeEnum.NeedsPlug;
xPlugAttrib = xPlug.GetCustomAttribute <PlugMethod>();
var xInlineAttrib = xPlug.GetCustomAttribute <InlineAttribute>();
var xMethodIdPlug = mItemsList.IndexOf(xPlug);
if ((xMethodIdPlug == -1) && (xInlineAttrib == null))
{
throw new Exception("Plug method not in scanner list!");
}
if ((xPlugAttrib != null) && (xInlineAttrib == null))
{
xPlugAssembler = xPlugAttrib.Assembler;
xPlugInfo = new _MethodInfo(xPlug, (uint)xMethodIdPlug, _MethodInfo.TypeEnum.Plug, null, xPlugAssembler);
var xMethodInfo = new _MethodInfo(xMethod, (uint)xMethodIdMethod, xMethodType, xPlugInfo);
if (xPlugAttrib.IsWildcard)
{
xPlugInfo.IsWildcard = true;
xPlugInfo.PluggedMethod = xMethodInfo;
var xInstructions = mReader.ProcessMethod(xPlug);
if (xInstructions != null)
{
ProcessInstructions(xInstructions);
mAsmblr.ProcessMethod(xPlugInfo, xInstructions);
}
}
mAsmblr.GenerateMethodForward(xMethodInfo, xPlugInfo);
}
else
{
if (xInlineAttrib != null)
{
var xMethodID = mItemsList.IndexOf(xItem);
if (xMethodID == -1)
{
throw new Exception("Method not in list!");
}
xPlugInfo = new _MethodInfo(xPlug, (uint)xMethodID, _MethodInfo.TypeEnum.Plug, null, true);
var xMethodInfo = new _MethodInfo(xMethod, (uint)xMethodIdMethod, xMethodType, xPlugInfo);
xPlugInfo.PluggedMethod = xMethodInfo;
var xInstructions = mReader.ProcessMethod(xPlug);
if (xInstructions != null)
{
ProcessInstructions(xInstructions);
mAsmblr.ProcessMethod(xPlugInfo, xInstructions);
}
mAsmblr.GenerateMethodForward(xMethodInfo, xPlugInfo);
}
else
{
xPlugInfo = new _MethodInfo(xPlug, (uint)xMethodIdPlug, _MethodInfo.TypeEnum.Plug, null, xPlugAssembler);
var xMethodInfo = new _MethodInfo(xMethod, (uint)xMethodIdMethod, xMethodType, xPlugInfo);
mAsmblr.GenerateMethodForward(xMethodInfo, xPlugInfo);
}
}
}
else
{
xPlugAttrib = xMethod.GetCustomAttribute <PlugMethod>();
if (xPlugAttrib != null)
{
if (xPlugAttrib.IsWildcard)
{
continue;
}
if (xPlugAttrib.PlugRequired)
{
throw new Exception(String.Format("Method {0} requires a plug, but none is implemented", xMethod.Name));
}
xPlugAssembler = xPlugAttrib.Assembler;
}
var xMethodInfo = new _MethodInfo(xMethod, (uint)xMethodIdMethod, xMethodType, xPlugInfo, xPlugAssembler);
var xInstructions = mReader.ProcessMethod(xMethod);
if (xInstructions != null)
{
ProcessInstructions(xInstructions);
mAsmblr.ProcessMethod(xMethodInfo, xInstructions);
}
}
}
else if (xItem is FieldInfo)
{
mAsmblr.ProcessField((FieldInfo)xItem);
}
}
var xTypes = new HashSet <Type>();
var xMethods = new HashSet <MethodBase>(new MethodBaseComparer());
foreach (var xItem in mItems)
{
if (xItem is MethodBase)
{
xMethods.Add((MethodBase)xItem);
}
else if (xItem is Type)
{
xTypes.Add((Type)xItem);
}
}
mAsmblr.GenerateVMTCode(xTypes, xMethods, GetTypeUID, GetMethodUID);
}
