protected override Expression VisitDynamic(DynamicExpression node)
{
Type siteType = typeof(CallSite <>).MakeGenericType(node.DelegateType);
// Rewite call site as constant
var siteExpr = VisitConstant(Expression.Constant(DynamicSiteHelpers.MakeSite(node.Binder, siteType)));
// Rewrite all of the arguments
var args = Visit(node.Arguments);
var siteVar = Expression.Variable(siteExpr.Type, "$site");
// ($site = siteExpr).Target.Invoke($site, *args)
return(Expression.Block(
new [] { siteVar },
Expression.Call(
Expression.Field(
Expression.Assign(siteVar, siteExpr),
siteType.GetField("Target")
),
node.DelegateType.GetMethod("Invoke"),
ArrayUtils.Insert(siteVar, args)
)
));
}
public Delegate CreateDelegate(Type delegateType, object dynamicObject)
{
Assert.NotNull(delegateType, dynamicObject);
object[] closure;
lock (_closureMap) {
if (!_closureMap.TryGetValue(dynamicObject, out WeakReference weakClosure) || (closure = (object[])weakClosure.Target) == null)
{
closure = new[] { TargetPlaceHolder, CallSitePlaceHolder, ConvertSitePlaceHolder };
_closureMap[dynamicObject] = new WeakReference(closure);
Type[] siteTypes = MakeSiteSignature(_parameterTypes);
CallSite callSite = CallSite.Create(DynamicSiteHelpers.MakeCallSiteDelegate(siteTypes), _invokeBinder);
CallSite convertSite = null;
if (_returnType != typeof(void))
{
convertSite = CallSite.Create(DynamicSiteHelpers.MakeCallSiteDelegate(typeof(object), _returnType), _convertBinder);
}
closure[TargetIndex] = dynamicObject;
closure[CallSiteIndex] = callSite;
closure[ConvertSiteIndex] = convertSite;
}
}
return(_method.CreateDelegate(delegateType, closure));
}
internal Delegate CreateDelegate(Type delegateType, object target)
{
Assert.NotNull(delegateType, target);
// to enable:
// function x() { }
// someClass.someEvent += delegateType(x)
// someClass.someEvent -= delegateType(x)
//
// we need to avoid re-creating the object array because they won't
// be compare equal when removing the delegate if they're difference
// instances. Therefore we use a weak hashtable to get back the
// original object array. The values also need to be weak to avoid
// creating a circular reference from the constants target back to the
// target. This is fine because as long as the delegate is referenced
// the object array will stay alive. Once the delegate is gone it's not
// wired up anywhere and -= will never be used again.
object[] clone;
lock (_constantMap) {
WeakReference cloneRef;
if (!_constantMap.TryGetValue(target, out cloneRef) ||
(clone = (object[])cloneRef.Target) == null)
{
_constantMap[target] = new WeakReference(clone = (object[])_constants.Clone());
Type[] siteTypes = MakeSiteSignature();
CallSite callSite = CallSite.Create(DynamicSiteHelpers.MakeCallSiteDelegate(siteTypes), _invokeBinder);
Type siteType = callSite.GetType();
Type convertSiteType = null;
CallSite convertSite = null;
if (_returnType != typeof(void))
{
convertSite = CallSite.Create(DynamicSiteHelpers.MakeCallSiteDelegate(typeof(object), _returnType), _convertBinder);
convertSiteType = convertSite.GetType();
}
Debug.Assert(clone[0] == TargetPlaceHolder);
Debug.Assert(clone[1] == CallSitePlaceHolder);
Debug.Assert(clone[2] == ConvertSitePlaceHolder);
clone[0] = target;
clone[1] = callSite;
clone[2] = convertSite;
}
}
return(ReflectionUtils.CreateDelegate(_method, delegateType, clone));
}
private static IEnumerable <DynamicStackFrame> GetStackFrames(StackTrace trace, List <DynamicStackFrame> dynamicFrames, bool reverseOrder)
{
StackFrame[] frames = trace.GetFrames();
if (frames == null)
{
yield break;
}
foreach (StackFrame frame in WalkList(frames, reverseOrder))
{
MethodBase method = frame.GetMethod();
Type parentType = method.DeclaringType;
if (dynamicFrames.Count > 0 && frame.GetMethod() == dynamicFrames[dynamicFrames.Count - 1].GetMethod())
{
yield return(dynamicFrames[dynamicFrames.Count - 1]);
dynamicFrames.RemoveAt(dynamicFrames.Count - 1);
continue;
}
if (parentType != null)
{
if (parentType == typeof(LambdaExpression) && method.Name == "DoExecute")
{
// Evaluated frame -- Replace with dynamic frame
Debug.Assert(dynamicFrames.Count > 0);
//if (dynamicFrames.Count == 0) continue;
yield return(dynamicFrames[dynamicFrames.Count - 1]);
dynamicFrames.RemoveAt(dynamicFrames.Count - 1);
continue;
}
}
if (DynamicSiteHelpers.IsInvisibleDlrStackFrame(method))
{
continue;
}
if (method.DeclaringType != null && Snippets.Shared.IsSnippetsAssembly(method.DeclaringType.Assembly))
{
yield return(GetStackFrame(frame));
}
}
}
private static MSA.LambdaExpression /*!*/ CreateLambda(string /*!*/ name, MSA.ParameterExpression /*!*/[] /*!*/ parameters, MSA.Expression /*!*/ body)
{
Type lambdaType = DynamicSiteHelpers.GetStandardDelegateType(AstFactory.GetSignature(parameters, typeof(object)));
if (lambdaType == null)
{
// to many parameters for Func<> delegate -> use object[]:
MSA.ParameterExpression array = Ast.Parameter(typeof(object[]), "#params");
var actualParameters = new MSA.ParameterExpression[] { parameters[0], parameters[1], array };
parameters = ArrayUtils.ShiftLeft(parameters, 2);
var bodyWithParamInit = new MSA.Expression[parameters.Length + 1];
for (int i = 0; i < parameters.Length; i++)
{
bodyWithParamInit[i] = Ast.Assign(parameters[i], Ast.ArrayIndex(array, Ast.Constant(i)));
}
bodyWithParamInit[parameters.Length] = body;
return(Ast.Lambda(
RubyMethodInfo.ParamsArrayDelegateType,
Ast.Block(
new ReadOnlyCollection <MSA.ParameterExpression>(parameters),
new ReadOnlyCollection <MSA.Expression>(bodyWithParamInit)
),
name,
new ReadOnlyCollection <MSA.ParameterExpression>(actualParameters)
));
}
else
{
return(Ast.Lambda(
lambdaType,
body,
name,
new ReadOnlyCollection <MSA.ParameterExpression>(parameters)
));
}
}
internal static Delegate CreateDelegateForDynamicObject(LanguageContext context, object dynamicObject, Type delegateType, MethodInfo invoke)
{
PerfTrack.NoteEvent(PerfTrack.Categories.DelegateCreate, delegateType.ToString());
Type returnType = invoke.ReturnType;
ParameterInfo[] parameterInfos = invoke.GetParameters();
var parameters = new List <ParameterExpression>();
for (int i = 0; i < parameterInfos.Length; i++)
{
parameters.Add(Expression.Parameter(parameterInfos[i].ParameterType, "p" + i));
}
InvokeBinder invokeBinder = context.CreateInvokeBinder(new CallInfo(parameterInfos.Length));
ConvertBinder convertBinder = (returnType != typeof(void)) ? context.CreateConvertBinder(returnType, explicitCast: true) : null;
CallSite invokeSite = CallSite.Create(DynamicSiteHelpers.MakeCallSiteDelegate(MakeSiteSignature(parameterInfos)), invokeBinder);
Type invokeSiteType = invokeSite.GetType();
Type convertSiteType;
CallSite convertSite;
if (convertBinder != null)
{
convertSite = CallSite.Create(DynamicSiteHelpers.MakeCallSiteDelegate(typeof(object), returnType), convertBinder);
convertSiteType = convertSite.GetType();
}
else
{
convertSiteType = null;
convertSite = null;
}
var locals = new List <ParameterExpression>();
ParameterExpression invokeSiteVar = Expression.Parameter(invokeSiteType, "site");
ParameterExpression convertSiteVar = null;
var args = new List <Expression>();
args.Add(invokeSiteVar);
args.Add(Expression.Constant(dynamicObject));
int strongBoxVarsStart = locals.Count;
for (int i = 0; i < parameterInfos.Length; i++)
{
if (parameterInfos[i].ParameterType.IsByRef)
{
var argType = parameterInfos[i].ParameterType;
Type elementType = argType.GetElementType();
Type concreteType = typeof(StrongBox <>).MakeGenericType(elementType);
var strongBox = Expression.Parameter(concreteType, "box" + i);
locals.Add(strongBox);
args.Add(
Expression.Assign(
strongBox,
Expression.New(
concreteType.GetConstructor(new Type[] { elementType }),
parameters[i]
)
)
);
}
else
{
args.Add(parameters[i]);
}
}
int strongBoxVarsEnd = locals.Count;
Expression invocation = Expression.Invoke(
Expression.Field(
Expression.Assign(
invokeSiteVar,
Expression.Convert(Expression.Constant(invokeSite), invokeSiteType)
),
invokeSiteType.GetDeclaredField("Target")
),
args
);
if (convertBinder != null)
{
convertSiteVar = Expression.Parameter(convertSiteType, "convertSite");
invocation = Expression.Invoke(
Expression.Field(
Expression.Assign(
convertSiteVar,
Expression.Convert(Expression.Constant(convertSite), convertSiteType)
),
convertSiteType.GetDeclaredField("Target")
),
convertSiteVar,
invocation
);
}
locals.Add(invokeSiteVar);
if (convertSiteVar != null)
{
locals.Add(convertSiteVar);
}
Expression body;
// copy back from StrongBox.Value
if (strongBoxVarsEnd > strongBoxVarsStart)
{
var block = new Expression[1 + strongBoxVarsEnd - strongBoxVarsStart + 1];
var resultVar = Expression.Parameter(invocation.Type, "result");
locals.Add(resultVar);
int b = 0;
int l = strongBoxVarsStart;
// values of strong boxes are initialized in invocation expression:
block[b++] = Expression.Assign(resultVar, invocation);
for (int i = 0; i < parameterInfos.Length; i++)
{
if (parameterInfos[i].ParameterType.IsByRef)
{
var local = locals[l++];
block[b++] = Expression.Assign(
parameters[i],
Expression.Field(local, local.Type.GetDeclaredField("Value"))
);
}
}
block[b++] = resultVar;
Debug.Assert(l == strongBoxVarsEnd);
Debug.Assert(b == block.Length);
body = Expression.Block(locals, block);
}
else
{
body = Expression.Block(locals, invocation);
}
var lambda = Expression.Lambda(delegateType, body, "_Scripting_", parameters);
return(lambda.Compile());
}
/// <summary>
/// Generates stub to receive the CLR call and then call the dynamic language code.
/// </summary>
private void EmitClrCallStub(ILGen cg)
{
List <ReturnFixer> fixers = new List <ReturnFixer>(0);
// Create strongly typed return type from the site.
// This will, among other things, generate tighter code.
Type[] siteTypes = MakeSiteSignature(_parameterTypes);
CallSite callSite = CallSite.Create(DynamicSiteHelpers.MakeCallSiteDelegate(siteTypes), _invokeBinder);
Type siteType = callSite.GetType();
Type convertSiteType = null;
CallSite convertSite = null;
if (_returnType != typeof(void))
{
convertSite = CallSite.Create(DynamicSiteHelpers.MakeCallSiteDelegate(typeof(object), _returnType), _convertBinder);
convertSiteType = convertSite.GetType();
}
LocalBuilder convertSiteLocal = null;
FieldInfo convertTarget = null;
if (_returnType != typeof(void))
{
// load up the conversion logic on the stack
convertSiteLocal = cg.DeclareLocal(convertSiteType);
EmitConstantGet(cg, ConvertSiteIndex, convertSiteType);
cg.Emit(OpCodes.Dup);
cg.Emit(OpCodes.Stloc, convertSiteLocal);
convertTarget = convertSiteType.GetDeclaredField("Target");
cg.EmitFieldGet(convertTarget);
cg.Emit(OpCodes.Ldloc, convertSiteLocal);
}
// load up the invoke logic on the stack
LocalBuilder site = cg.DeclareLocal(siteType);
EmitConstantGet(cg, CallSiteIndex, siteType);
cg.Emit(OpCodes.Dup);
cg.Emit(OpCodes.Stloc, site);
FieldInfo target = siteType.GetDeclaredField("Target");
cg.EmitFieldGet(target);
cg.Emit(OpCodes.Ldloc, site);
EmitConstantGet(cg, TargetIndex, typeof(object));
for (int i = 0; i < _parameterTypes.Length; i++)
{
if (_parameterTypes[i].IsByRef)
{
ReturnFixer rf = ReturnFixer.EmitArgument(cg, i + 1, _parameterTypes[i]);
if (rf != null)
{
fixers.Add(rf);
}
}
else
{
cg.EmitLoadArg(i + 1);
}
}
// emit the invoke for the call
cg.EmitCall(target.FieldType, "Invoke");
// emit the invoke for the convert
if (_returnType == typeof(void))
{
cg.Emit(OpCodes.Pop);
}
else
{
cg.EmitCall(convertTarget.FieldType, "Invoke");
}
// fixup any references
foreach (ReturnFixer rf in fixers)
{
rf.FixReturn(cg);
}
cg.Emit(OpCodes.Ret);
}
/// <summary>
/// Generates stub to receive the CLR call and then call the dynamic language code.
/// </summary>
public static void EmitClrCallStub(CodeGen cg, Slot callTarget, int firstArg, CallType functionAttributes)
{
List <ReturnFixer> fixers = new List <ReturnFixer>(0);
IList <Slot> args = cg.ArgumentSlots;
int nargs = args.Count - firstArg;
CallAction action;
if ((functionAttributes & CallType.ArgumentList) != 0)
{
ArgumentInfo[] infos = CompilerHelpers.MakeRepeatedArray(ArgumentInfo.Simple, nargs);
infos[nargs - 1] = new ArgumentInfo(ArgumentKind.List);
action = CallAction.Make(new CallSignature(infos));
}
else
{
action = CallAction.Make(nargs);
}
bool fast;
Slot site = cg.CreateDynamicSite(action,
CompilerHelpers.MakeRepeatedArray(typeof(object), nargs + 2),
out fast);
site.EmitGet(cg);
if (!fast)
{
cg.EmitCodeContext();
}
if (DynamicSiteHelpers.IsBigTarget(site.Type))
{
cg.EmitTuple(site.Type.GetGenericArguments()[0], args.Count + 1, delegate(int index) {
if (index == 0)
{
callTarget.EmitGet(cg);
}
else
{
ReturnFixer rf = ReturnFixer.EmitArgument(cg, args[index - 1]);
if (rf != null)
{
fixers.Add(rf);
}
}
});
}
else
{
callTarget.EmitGet(cg);
for (int i = firstArg; i < args.Count; i++)
{
ReturnFixer rf = ReturnFixer.EmitArgument(cg, args[i]);
if (rf != null)
{
fixers.Add(rf);
}
}
}
cg.EmitCall(site.Type, "Invoke");
foreach (ReturnFixer rf in fixers)
{
rf.FixReturn(cg);
}
cg.EmitReturnFromObject();
}
/// <summary>
/// Generates stub to receive the CLR call and then call the dynamic language code.
/// </summary>
private object[] EmitClrCallStub(ILGen cg)
{
List <ReturnFixer> fixers = new List <ReturnFixer>(0);
ArgumentInfo[] args = new ArgumentInfo[_parameters.Length];
for (int i = 0; i < args.Length; i++)
{
args[i] = Expression.PositionalArg(i);
}
ConvertBinder convert = _context.CreateConvertBinder(_returnType, true);
InvokeBinder action = _context.CreateInvokeBinder(args);
// Create strongly typed return type from the site.
// This will, among other things, generate tighter code.
Type[] siteTypes = MakeSiteSignature();
Type siteType = DynamicSiteHelpers.MakeCallSiteType(siteTypes);
CallSite callSite = DynamicSiteHelpers.MakeSite(action, siteType);
Type convertSiteType = null;
CallSite convertSite = null;
if (_returnType != typeof(void))
{
convertSiteType = DynamicSiteHelpers.MakeCallSiteType(typeof(object), _returnType);
convertSite = DynamicSiteHelpers.MakeSite(convert, convertSiteType);
}
// build up constants array
object[] constants = new object[] { TargetPlaceHolder, callSite, convertSite };
const int TargetIndex = 0, CallSiteIndex = 1, ConvertSiteIndex = 2;
LocalBuilder convertSiteLocal = null;
FieldInfo convertTarget = null;
if (_returnType != typeof(void))
{
// load up the conversesion logic on the stack
convertSiteLocal = cg.DeclareLocal(convertSiteType);
EmitConstantGet(cg, ConvertSiteIndex, convertSiteType);
cg.Emit(OpCodes.Dup);
cg.Emit(OpCodes.Stloc, convertSiteLocal);
convertTarget = convertSiteType.GetField("Target");
cg.EmitFieldGet(convertTarget);
cg.Emit(OpCodes.Ldloc, convertSiteLocal);
}
// load up the invoke logic on the stack
LocalBuilder site = cg.DeclareLocal(siteType);
EmitConstantGet(cg, CallSiteIndex, siteType);
cg.Emit(OpCodes.Dup);
cg.Emit(OpCodes.Stloc, site);
FieldInfo target = siteType.GetField("Target");
cg.EmitFieldGet(target);
cg.Emit(OpCodes.Ldloc, site);
EmitConstantGet(cg, TargetIndex, typeof(object));
for (int i = 0; i < _parameters.Length; i++)
{
if (_parameters[i].ParameterType.IsByRef)
{
ReturnFixer rf = ReturnFixer.EmitArgument(cg, i + 1, _parameters[i].ParameterType);
if (rf != null)
{
fixers.Add(rf);
}
}
else
{
cg.EmitLoadArg(i + 1);
}
}
// emit the invoke for the call
cg.EmitCall(target.FieldType, "Invoke");
// emit the invoke for the convert
if (_returnType == typeof(void))
{
cg.Emit(OpCodes.Pop);
}
else
{
cg.EmitCall(convertTarget.FieldType, "Invoke");
}
// fixup any references
foreach (ReturnFixer rf in fixers)
{
rf.FixReturn(cg);
}
cg.Emit(OpCodes.Ret);
return(constants);
}
