private static bool DoStubCall(int callerIndex, bool staticMethod, bool onValueType, GenericShape typeGenericShape, GenericShape methodGenericShape)
{
string callerNameSeed = Config.InstantiatingStubPrefix + "Caller" + callerIndex; // Use a consistent seed value here so that the various various of unboxing/instantiating stubs are generated with the same arg shape
string callerName = callerNameSeed + (staticMethod ? "Static" : "Instance") + (onValueType ? "Class" : "ValueType") + typeGenericShape.ToString() + methodGenericShape.ToString();
Random rand = new Random(GetSeed(callerNameSeed));
List <TypeEx> pms;
do
{
pms = RandomParameters(s_allTypes, rand);
} while (pms.Count > 16);
Type delegateType = GetDelegateType(pms, typeof(int));
Callee callee = new Callee(callerName + "Callee", pms);// CreateCallee(Config.PInvokeePrefix + calleeIndex, s_allTypes);
callee.Emit();
Delegate calleeDelegate = callee.Method.CreateDelegate(delegateType);
int newStubCount = Interlocked.Increment(ref s_stubTypesCreated);
if ((s_stubTypesModule == null) || (newStubCount % 1000) == 0)
{
AssemblyBuilder stubsAssembly = AssemblyBuilder.DefineDynamicAssembly(new AssemblyName("ABIStress_Stubs" + newStubCount), AssemblyBuilderAccess.RunAndCollect);
s_stubTypesModule = stubsAssembly.DefineDynamicModule("ABIStress_Stubs" + newStubCount);
}
// This code is based on DelegateHelpers.cs in System.Linq.Expressions.Compiler
TypeBuilder tb =
s_stubTypesModule.DefineType(
$"{callerName}_GenericTarget",
TypeAttributes.Class | TypeAttributes.Public | TypeAttributes.Sealed | TypeAttributes.AutoClass,
onValueType ? typeof(object) : typeof(ValueType));
GenericTypeParameterBuilder[] typeParamsType = null;
if (typeGenericShape != GenericShape.NotGeneric)
{
typeParamsType = tb.DefineGenericParameters(new string[] { "T" });
}
FieldInfo fieldDeclaration = tb.DefineField("MagicValue", typeof(int), FieldAttributes.Public);
Type typeofInstantiatedType;
FieldInfo fieldInfoMagicValueField;
if (typeGenericShape == GenericShape.NotGeneric)
{
typeofInstantiatedType = tb;
fieldInfoMagicValueField = fieldDeclaration;
}
else
{
typeofInstantiatedType = tb.MakeGenericType(typeParamsType[0]);
fieldInfoMagicValueField = TypeBuilder.GetField(typeofInstantiatedType, fieldDeclaration);
}
ConstructorBuilder cb = tb.DefineConstructor(
MethodAttributes.Public | MethodAttributes.HideBySig | MethodAttributes.RTSpecialName,
CallingConventions.Standard,
new Type[] { typeof(int) });
cb.SetImplementationFlags(MethodImplAttributes.Managed);
ILGenerator g = cb.GetILGenerator();
g.Emit(OpCodes.Ldarg, 0);
g.Emit(OpCodes.Call, typeof(object).GetConstructor(Array.Empty <Type>()));
g.Emit(OpCodes.Ldarg, 0);
g.Emit(OpCodes.Ldarg_1);
g.Emit(OpCodes.Stfld, fieldInfoMagicValueField);
g.Emit(OpCodes.Ret);
MethodAttributes methodAttributes = MethodAttributes.Public | MethodAttributes.HideBySig;
if (staticMethod)
{
methodAttributes |= MethodAttributes.Static;
}
MethodBuilder mbInstance = tb.DefineMethod(
"Method",
methodAttributes,
callee.Method.ReturnType,
callee.Parameters.Select(t => t.Type).ToArray());
GenericTypeParameterBuilder[] typeParamsMethod = null;
if (methodGenericShape != GenericShape.NotGeneric)
{
typeParamsMethod = mbInstance.DefineGenericParameters(new string[] { "T" });
}
mbInstance.SetImplementationFlags(MethodImplAttributes.Managed);
int magicNumberEmbeddedInObject = rand.Next();
GCHandle gchCallee = GCHandle.Alloc(callee.Method.CreateDelegate(delegateType));
IntPtr gchCalleeIntPtr = GCHandle.ToIntPtr(gchCallee);
g = mbInstance.GetILGenerator();
if (!staticMethod)
{
// Verify random number made it intact, and this parameter was handled correctly
g.Emit(OpCodes.Ldarg_0);
g.Emit(OpCodes.Ldfld, fieldInfoMagicValueField);
g.Emit(OpCodes.Ldc_I4, magicNumberEmbeddedInObject);
g.Emit(OpCodes.Call, s_compareNumbers);
}
// Verify generic args are as expected
EmitTypeHandleCheck(g, typeGenericShape, typeParamsType, "type");
EmitTypeHandleCheck(g, methodGenericShape, typeParamsMethod, "method");
// Make the call to callee
LocalBuilder gcHandleLocal = g.DeclareLocal(typeof(GCHandle));
// Load GCHandle of callee delegate
g.Emit(OpCodes.Ldc_I8, (long)gchCalleeIntPtr);
g.Emit(OpCodes.Conv_I);
g.Emit(OpCodes.Call, s_gcHandleFromIntPtr);
g.Emit(OpCodes.Stloc, gcHandleLocal);
// Resolve to target
g.Emit(OpCodes.Ldloca, gcHandleLocal);
g.Emit(OpCodes.Call, s_gcHandle_getTarget);
// Cast to delegate type
g.Emit(OpCodes.Castclass, delegateType);
// Load all args
int argOffset = 1;
if (staticMethod)
{
argOffset = 0;
}
for (int i = 0; i < pms.Count; i++)
{
g.Emit(OpCodes.Ldarg, argOffset + i);
}
// Call delegate invoke method
g.Emit(OpCodes.Callvirt, delegateType.GetMethod("Invoke"));
// ret
g.Emit(OpCodes.Ret);
Type calleeTypeOpen = tb.CreateType();
Type calleeType;
switch (typeGenericShape)
{
case GenericShape.NotGeneric:
calleeType = calleeTypeOpen;
break;
case GenericShape.GenericOverReferenceType:
calleeType = calleeTypeOpen.MakeGenericType(typeof(object));
break;
case GenericShape.GenericOverValueType:
calleeType = calleeTypeOpen.MakeGenericType(typeof(int));
break;
default:
throw new Exception("Unknown case");
}
MethodInfo targetMethodOpen = calleeType.GetMethod("Method");
MethodInfo targetMethod;
switch (methodGenericShape)
{
case GenericShape.NotGeneric:
targetMethod = targetMethodOpen;
break;
case GenericShape.GenericOverReferenceType:
targetMethod = targetMethodOpen.MakeGenericMethod(typeof(object));
break;
case GenericShape.GenericOverValueType:
targetMethod = targetMethodOpen.MakeGenericMethod(typeof(int));
break;
default:
throw new Exception("Unknown case");
}
Delegate targetMethodToCallDel;
if (staticMethod)
{
targetMethodToCallDel = targetMethod.CreateDelegate(delegateType);
}
else
{
targetMethodToCallDel = targetMethod.CreateDelegate(delegateType, Activator.CreateInstance(calleeType, magicNumberEmbeddedInObject));
}
GCHandle gchTargetMethod = GCHandle.Alloc(targetMethodToCallDel);
// CALLER Dynamic method
DynamicMethod caller = new DynamicMethod(
callerName, typeof(int), pms.Select(t => t.Type).ToArray(), typeof(Program).Module);
g = caller.GetILGenerator();
// Create the args to pass to the callee from the caller.
List <Value> args = GenCallerToCalleeArgs(pms, callee.Parameters, rand);
if (Config.Verbose)
{
EmitDumpValues("Caller's incoming args", g, pms.Select((p, i) => new ArgValue(p, i)));
}
if (Config.Verbose)
{
EmitDumpValues($"Caller's args to {callerName} call", g, args);
}
gcHandleLocal = g.DeclareLocal(typeof(GCHandle));
g.Emit(OpCodes.Ldc_I8, (long)GCHandle.ToIntPtr(gchTargetMethod));
g.Emit(OpCodes.Conv_I);
g.Emit(OpCodes.Call, s_gcHandleFromIntPtr);
g.Emit(OpCodes.Stloc, gcHandleLocal);
// Resolve to target
g.Emit(OpCodes.Ldloca, gcHandleLocal);
g.Emit(OpCodes.Call, s_gcHandle_getTarget);
// Cast to delegate type
g.Emit(OpCodes.Castclass, delegateType);
foreach (Value v in args)
{
v.Emit(g);
}
// Call delegate invoke method
g.Emit(OpCodes.Callvirt, delegateType.GetMethod("Invoke"));
// ret
g.Emit(OpCodes.Ret);
(object callerResult, object calleeResult) = InvokeCallerCallee(caller, pms, callee.Method, args, rand);
gchCallee.Free();
gchTargetMethod.Free();
if (callerResult.Equals(calleeResult))
{
return(true);
}
Console.WriteLine("Mismatch in stub call: expected {0}, got {1}", calleeResult, callerResult);
Console.WriteLine(callerName);
WriteSignature(caller);
WriteSignature(callee.Method);
return(false);
}
private static bool DoTailCall(int callerIndex)
{
// We pregenerate tail callee parameter lists because we want to be able to select
// a callee with less arg stack space than this caller.
if (s_tailCallees == null)
{
s_tailCallees =
Enumerable.Range(0, Config.NumCallees)
.Select(i => CreateCallee(Config.TailCalleePrefix + i, s_tailCalleeCandidateArgTypes))
.ToList();
}
string callerName = Config.TailCallerPrefix + callerIndex;
Random rand = new Random(GetSeed(callerName));
List <TypeEx> callerParams;
List <Callee> callable;
do
{
callerParams = RandomParameters(s_tailCalleeCandidateArgTypes, rand);
int argStackSizeApprox = s_abi.ApproximateArgStackAreaSize(callerParams);
callable = s_tailCallees.Where(t => t.ArgStackSizeApprox < argStackSizeApprox).ToList();
} while (callable.Count <= 0);
int calleeIndex = rand.Next(callable.Count);
Callee callee = callable[calleeIndex];
callee.Emit();
DynamicMethod caller = new DynamicMethod(
callerName, typeof(int), callerParams.Select(t => t.Type).ToArray(), typeof(Program).Module);
ILGenerator g = caller.GetILGenerator();
// Create the args to pass to the callee from the caller.
List <Value> args = GenCallerToCalleeArgs(callerParams, callee.Parameters, rand);
if (Config.Verbose)
{
EmitDumpValues("Caller's incoming args", g, callerParams.Select((p, i) => new ArgValue(p, i)));
EmitDumpValues("Caller's args to tailcall", g, args);
}
foreach (Value v in args)
{
v.Emit(g);
}
g.Emit(OpCodes.Tailcall);
g.EmitCall(OpCodes.Call, callee.Method, null);
g.Emit(OpCodes.Ret);
(object callerResult, object calleeResult) = InvokeCallerCallee(caller, callerParams, callee.Method, args, rand);
if (callerResult.Equals(calleeResult))
{
return(true);
}
Console.WriteLine("Mismatch in tailcall: expected {0}, got {1}", calleeResult, callerResult);
WriteSignature(caller);
WriteSignature(callee.Method);
return(false);
}
