protected void Assemble()
{
foreach (var xItem in mItems)
{
if (xItem is MethodBase)
{
var xMethod = (MethodBase)xItem;
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;
if (xPlug != null)
{
xMethodType = MethodInfo.TypeEnum.NeedsPlug;
PlugMethodAttribute xAttrib = null;
foreach (PlugMethodAttribute attrib in xPlug.GetCustomAttributes(typeof(PlugMethodAttribute), true))
{
xAttrib = attrib;
}
if (xAttrib != null)
{
xPlugAssembler = xAttrib.Assembler;
xPlugInfo = new MethodInfo(xPlug, (uint)mItemsList.IndexOf(xPlug), MethodInfo.TypeEnum.Plug, null, xPlugAssembler);
var xMethodInfo = new MethodInfo(xMethod, (uint)mItemsList.IndexOf(xMethod), xMethodType, xPlugInfo /*, xPlugAssembler*/);
if (xAttrib != null && xAttrib.IsWildcard)
{
xPlugInfo.PluggedMethod = xMethodInfo;
var xInstructions = mReader.ProcessMethod(xPlug);
if (xInstructions != null)
{
ProcessInstructions(xInstructions);
mAsmblr.ProcessMethod(xPlugInfo, xInstructions);
}
}
mAsmblr.GenerateMethodForward(xMethodInfo, xPlugInfo);
}
else
{
InlineAttribute inl = null;
foreach (InlineAttribute inli in xPlug.GetCustomAttributes(typeof(InlineAttribute), false))
{
inl = inli;
}
if (inl != null)
{
xPlugInfo = new MethodInfo(xPlug, (uint)mItemsList.IndexOf(xItem), MethodInfo.TypeEnum.Plug, null, true);
var xMethodInfo = new MethodInfo(xMethod, (uint)mItemsList.IndexOf(xMethod), xMethodType, xPlugInfo /*, xPlugAssembler*/);
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)mItemsList.IndexOf(xPlug), MethodInfo.TypeEnum.Plug, null, xPlugAssembler);
var xMethodInfo = new MethodInfo(xMethod, (uint)mItemsList.IndexOf(xMethod), xMethodType, xPlugInfo /*, xPlugAssembler*/);
if (xAttrib != null && xAttrib.IsWildcard)
{
xPlugInfo.PluggedMethod = xMethodInfo;
var xInstructions = mReader.ProcessMethod(xPlug);
if (xInstructions != null)
{
ProcessInstructions(xInstructions);
mAsmblr.ProcessMethod(xPlugInfo, xInstructions);
}
}
mAsmblr.GenerateMethodForward(xMethodInfo, xPlugInfo);
}
}
}
else
{
PlugMethodAttribute xAttrib = null;
foreach (PlugMethodAttribute attrib in xMethod.GetCustomAttributes(typeof(PlugMethodAttribute), true))
{
xAttrib = attrib;
}
if (xAttrib != null)
{
if (xAttrib.IsWildcard)
{
continue;
}
xPlugAssembler = xAttrib.Assembler;
}
var xMethodInfo = new MethodInfo(xMethod, (uint)mItemsList.IndexOf(xMethod), 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>();
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, x => GetMethodUID(x, false));
}
protected void Assemble()
{
foreach (var xItem in mItems)
{
if (xItem is MethodBase)
{
var xMethod = (MethodBase)xItem;
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!");
}
if (xPlug != null)
{
xMethodType = MethodInfo.TypeEnum.NeedsPlug;
var xAttrib = xPlug.GetCustomAttribute <PlugMethodAttribute>();
var xInline = xPlug.GetCustomAttribute <InlineAttribute>();
var xMethodIdPlug = mItemsList.IndexOf(xPlug);
if (xMethodIdPlug == -1 && xInline == null)
{
throw new Exception("Plug method not in scanner list!");
}
if (xAttrib != null && xInline == null)
{
xPlugAssembler = xAttrib.Assembler;
xPlugInfo = new MethodInfo(xPlug, (uint)xMethodIdPlug, MethodInfo.TypeEnum.Plug, null, xPlugAssembler);
var xMethodInfo = new MethodInfo(xMethod, (uint)xMethodIdMethod, xMethodType, xPlugInfo /*, xPlugAssembler*/);
if (xAttrib != null && xAttrib.IsWildcard)
{
xPlugInfo.PluggedMethod = xMethodInfo;
var xInstructions = mReader.ProcessMethod(xPlug);
if (xInstructions != null)
{
ProcessInstructions(xInstructions);
mAsmblr.ProcessMethod(xPlugInfo, xInstructions);
}
}
mAsmblr.GenerateMethodForward(xMethodInfo, xPlugInfo);
}
else
{
if (xInline != 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 /*, xPlugAssembler*/);
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 /*, xPlugAssembler*/);
mAsmblr.GenerateMethodForward(xMethodInfo, xPlugInfo);
}
}
}
else
{
PlugMethodAttribute xAttrib = null;
foreach (PlugMethodAttribute attrib in xMethod.GetCustomAttributes(typeof(PlugMethodAttribute), true))
{
xAttrib = attrib;
}
if (xAttrib != null)
{
if (xAttrib.IsWildcard)
{
continue;
}
else if (xAttrib.PlugRequired)
{
throw new Exception(string.Format("Method {0} requires a plug, but none is implemented", xMethod.Name));
}
xPlugAssembler = xAttrib.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>();
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, x => GetMethodUID(x, false));
}
public void Execute(MethodBase aStartMethod, IEnumerable <Assembly> plugsAssemblies)
{
if (aStartMethod == null)
{
throw new ArgumentNullException(nameof(aStartMethod));
}
// TODO: Investigate using MS CCI
// Need to check license, as well as in profiler
// http://cciast.codeplex.com/
#region Description
// Methodology
//
// Ok - we've done the scanner enough times to know it needs to be
// documented super well so that future changes won't inadvertently
// break undocumented and unseen requirements.
//
// We've tried many approaches including recursive and additive scanning.
// They typically end up being inefficient, overly complex, or both.
//
// -We would like to scan all types/methods so we can plug them.
// -But we can't scan them until we plug them, because we will scan things
// that plugs would remove/change the paths of.
// -Plugs may also call methods which are also plugged.
// -We cannot resolve plugs ahead of time but must do on the fly during
// scanning.
// -TODO: Because we do on the fly resolution, we need to add explicit
// checking of plug classes and err when public methods are found that
// do not resolve. Maybe we can make a list and mark, or rescan. Can be done
// later or as an optional auditing step.
//
// This why in the past we had repetitive scans.
//
// Now we focus on more passes, but simpler execution. In the end it should
// be eaiser to optmize and yield overall better performance. Most of the
// passes should be low overhead versus an integrated system which often
// would need to reiterate over items multiple times. So we do more loops on
// with less repetitive analysis, instead of fewer loops but more repetition.
//
// -Locate all plug classes
// -Scan from entry point collecting all types and methods while checking
// for and following plugs
// -For each type
// -Include all ancestors
// -Include all static constructors
// -For each virtual method
// -Scan overloads in descendants until IsFinal, IsSealed or end
// -Scan base in ancestors until top or IsAbstract
// -Go to scan types again, until no new ones found.
// -Because the virtual method scanning will add to the list as it goes, maintain
// 2 lists.
// -Known Types and Methods
// -Types and Methods in Queue - to be scanned
// -Finally, do compilation
#endregion Description
mPlugManager.FindPlugImpls(plugsAssemblies);
// Now that we found all plugs, scan them.
// We have to scan them after we find all plugs, because
// plugs can use other plugs
mPlugManager.ScanFoundPlugs();
foreach (var xPlug in mPlugManager.PlugImpls)
{
CompilerHelpers.Debug($"Plug found: '{xPlug.Key.FullName}' in '{xPlug.Key.Assembly.FullName}'");
}
ILOp.PlugManager = mPlugManager;
// Pull in extra implementations, GC etc.
Queue(RuntimeEngineRefs.InitializeApplicationRef, null, "Explicit Entry");
Queue(RuntimeEngineRefs.FinalizeApplicationRef, null, "Explicit Entry");
Queue(VTablesImplRefs.IsInstanceRef, null, "Explicit Entry");
Queue(VTablesImplRefs.SetTypeInfoRef, null, "Explicit Entry");
Queue(VTablesImplRefs.SetInterfaceInfoRef, null, "Explicit Entry");
Queue(VTablesImplRefs.SetMethodInfoRef, null, "Explicit Entry");
Queue(VTablesImplRefs.SetInterfaceMethodInfoRef, null, "Explicit Entry");
Queue(VTablesImplRefs.GetMethodAddressForTypeRef, null, "Explicit Entry");
Queue(VTablesImplRefs.GetMethodAddressForInterfaceTypeRef, null, "Explicit Entry");
Queue(GCImplementationRefs.IncRefCountRef, null, "Explicit Entry");
Queue(GCImplementationRefs.DecRefCountRef, null, "Explicit Entry");
Queue(GCImplementationRefs.AllocNewObjectRef, null, "Explicit Entry");
// for now, to ease runtime exception throwing
Queue(typeof(ExceptionHelper).GetMethod("ThrowNotImplemented", new Type[] { typeof(string) }, null), null, "Explicit Entry");
Queue(typeof(ExceptionHelper).GetMethod("ThrowOverflow", Type.EmptyTypes, null), null, "Explicit Entry");
Queue(typeof(ExceptionHelper).GetMethod("ThrowInvalidOperation", new Type[] { typeof(string) }, null), null, "Explicit Entry");
Queue(typeof(ExceptionHelper).GetMethod("ThrowArgumentOutOfRange", new Type[] { typeof(string) }, null), null, "Explicit Entry");
// register system types:
Queue(typeof(Array), null, "Explicit Entry");
Queue(typeof(Array).GetConstructors(BindingFlags.NonPublic | BindingFlags.Instance).First(), null, "Explicit Entry");
Queue(typeof(MulticastDelegate).GetMethod("GetInvocationList"), null, "Explicit Entry");
Queue(ExceptionHelperRefs.CurrentExceptionRef, null, "Explicit Entry");
Queue(ExceptionHelperRefs.ThrowInvalidCastExceptionRef, null, "Explicit Entry");
Queue(ExceptionHelperRefs.ThrowNotFiniteNumberExceptionRef, null, "Explicit Entry");
mAsmblr.ProcessField(typeof(string).GetField("Empty", BindingFlags.Static | BindingFlags.Public));
// Start from entry point of this program
Queue(aStartMethod, null, "Entry Point");
ScanQueue();
UpdateAssemblies();
Assemble();
mAsmblr.EmitEntrypoint(aStartMethod);
}