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reflectioninvocation.cpp
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reflectioninvocation.cpp
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
//
//
#include "common.h"
#include "reflectioninvocation.h"
#include "invokeutil.h"
#include "object.h"
#include "class.h"
#include "method.hpp"
#include "typehandle.h"
#include "field.h"
#include "eeconfig.h"
#include "vars.hpp"
#include "jitinterface.h"
#include "contractimpl.h"
#include "virtualcallstub.h"
#include "comdelegate.h"
#include "generics.h"
#ifdef FEATURE_COMINTEROP
#include "interoputil.h"
#include "runtimecallablewrapper.h"
#endif
#include "dbginterface.h"
#include "argdestination.h"
// these flags are defined in XXXInfo.cs and only those that are used are replicated here
#define INVOCATION_FLAGS_UNKNOWN 0x00000000
#define INVOCATION_FLAGS_INITIALIZED 0x00000001
// it's used for both method and field to signify that no access is allowed
#define INVOCATION_FLAGS_NO_INVOKE 0x00000002
// #define unused 0x00000004
// because field and method are different we can reuse the same bits
//method
#define INVOCATION_FLAGS_IS_CTOR 0x00000010
#define INVOCATION_FLAGS_RISKY_METHOD 0x00000020
// #define unused 0x00000040
#define INVOCATION_FLAGS_IS_DELEGATE_CTOR 0x00000080
#define INVOCATION_FLAGS_CONTAINS_STACK_POINTERS 0x00000100
// field
#define INVOCATION_FLAGS_SPECIAL_FIELD 0x00000010
#define INVOCATION_FLAGS_FIELD_SPECIAL_CAST 0x00000020
// temporary flag used for flagging invocation of method vs ctor
#define INVOCATION_FLAGS_CONSTRUCTOR_INVOKE 0x10000000
/**************************************************************************/
/* if the type handle 'th' is a byref to a nullable type, return the
type handle to the nullable type in the byref. Otherwise return
the null type handle */
static TypeHandle NullableTypeOfByref(TypeHandle th) {
CONTRACTL
{
NOTHROW;
GC_NOTRIGGER;
SO_TOLERANT;
MODE_ANY;
}
CONTRACTL_END;
if (th.GetVerifierCorElementType() != ELEMENT_TYPE_BYREF)
return TypeHandle();
TypeHandle subType = th.AsTypeDesc()->GetTypeParam();
if (!Nullable::IsNullableType(subType))
return TypeHandle();
return subType;
}
static void TryCallMethodWorker(MethodDescCallSite* pMethodCallSite, ARG_SLOT* args, Frame* pDebuggerCatchFrame)
{
// Use static contracts b/c we have SEH.
STATIC_CONTRACT_THROWS;
STATIC_CONTRACT_GC_TRIGGERS;
STATIC_CONTRACT_MODE_ANY;
struct Param: public NotifyOfCHFFilterWrapperParam
{
MethodDescCallSite * pMethodCallSite;
ARG_SLOT* args;
} param;
param.pFrame = pDebuggerCatchFrame;
param.pMethodCallSite = pMethodCallSite;
param.args = args;
PAL_TRY(Param *, pParam, ¶m)
{
pParam->pMethodCallSite->CallWithValueTypes(pParam->args);
}
PAL_EXCEPT_FILTER(NotifyOfCHFFilterWrapper)
{
// Should never reach here b/c handler should always continue search.
_ASSERTE(false);
}
PAL_ENDTRY
}
// Warning: This method has subtle differences from CallDescrWorkerReflectionWrapper
// In particular that one captures watson bucket data and corrupting exception severity,
// then transfers that data to the newly produced TargetInvocationException. This one
// doesn't take those same steps.
//
static void TryCallMethod(MethodDescCallSite* pMethodCallSite, ARG_SLOT* args, bool wrapExceptions) {
CONTRACTL {
THROWS;
GC_TRIGGERS;
MODE_COOPERATIVE;
}
CONTRACTL_END;
if (wrapExceptions)
{
OBJECTREF ppException = NULL;
GCPROTECT_BEGIN(ppException);
// The sole purpose of having this frame is to tell the debugger that we have a catch handler here
// which may swallow managed exceptions. The debugger needs this in order to send a
// CatchHandlerFound (CHF) notification.
FrameWithCookie<DebuggerU2MCatchHandlerFrame> catchFrame;
EX_TRY{
TryCallMethodWorker(pMethodCallSite, args, &catchFrame);
}
EX_CATCH{
ppException = GET_THROWABLE();
_ASSERTE(ppException);
}
EX_END_CATCH(RethrowTransientExceptions)
catchFrame.Pop();
// It is important to re-throw outside the catch block because re-throwing will invoke
// the jitter and managed code and will cause us to use more than the backout stack limit.
if (ppException != NULL)
{
// If we get here we need to throw an TargetInvocationException
OBJECTREF except = InvokeUtil::CreateTargetExcept(&ppException);
COMPlusThrow(except);
}
GCPROTECT_END();
}
else
{
pMethodCallSite->CallWithValueTypes(args);
}
}
FCIMPL5(Object*, RuntimeFieldHandle::GetValue, ReflectFieldObject *pFieldUNSAFE, Object *instanceUNSAFE, ReflectClassBaseObject *pFieldTypeUNSAFE, ReflectClassBaseObject *pDeclaringTypeUNSAFE, CLR_BOOL *pDomainInitialized) {
CONTRACTL {
FCALL_CHECK;
}
CONTRACTL_END;
struct _gc
{
OBJECTREF target;
REFLECTCLASSBASEREF pFieldType;
REFLECTCLASSBASEREF pDeclaringType;
REFLECTFIELDREF refField;
}gc;
gc.target = ObjectToOBJECTREF(instanceUNSAFE);
gc.pFieldType = (REFLECTCLASSBASEREF)ObjectToOBJECTREF(pFieldTypeUNSAFE);
gc.pDeclaringType = (REFLECTCLASSBASEREF)ObjectToOBJECTREF(pDeclaringTypeUNSAFE);
gc.refField = (REFLECTFIELDREF)ObjectToOBJECTREF(pFieldUNSAFE);
if ((gc.pFieldType == NULL) || (gc.refField == NULL))
FCThrowRes(kArgumentNullException, W("Arg_InvalidHandle"));
TypeHandle fieldType = gc.pFieldType->GetType();
TypeHandle declaringType = (gc.pDeclaringType != NULL) ? gc.pDeclaringType->GetType() : TypeHandle();
Assembly *pAssem;
if (declaringType.IsNull())
{
// global field
pAssem = gc.refField->GetField()->GetModule()->GetAssembly();
}
else
{
pAssem = declaringType.GetAssembly();
}
if (pAssem->IsIntrospectionOnly())
FCThrowEx(kInvalidOperationException, IDS_EE_CODEEXECUTION_IN_INTROSPECTIVE_ASSEMBLY, NULL, NULL, NULL);
// We should throw NotSupportedException here.
// But for backward compatibility we are throwing FieldAccessException instead.
if (pAssem->IsDynamic() && !pAssem->HasRunAccess())
FCThrow(kFieldAccessException);
OBJECTREF rv = NULL; // not protected
HELPER_METHOD_FRAME_BEGIN_RET_PROTECT(gc);
// There can be no GC after this until the Object is returned.
rv = InvokeUtil::GetFieldValue(gc.refField->GetField(), fieldType, &gc.target, declaringType, pDomainInitialized);
HELPER_METHOD_FRAME_END();
return OBJECTREFToObject(rv);
}
FCIMPLEND
FCIMPL2(FC_BOOL_RET, ReflectionInvocation::CanValueSpecialCast, ReflectClassBaseObject *pValueTypeUNSAFE, ReflectClassBaseObject *pTargetTypeUNSAFE) {
CONTRACTL {
FCALL_CHECK;
PRECONDITION(CheckPointer(pValueTypeUNSAFE));
PRECONDITION(CheckPointer(pTargetTypeUNSAFE));
}
CONTRACTL_END;
REFLECTCLASSBASEREF refValueType = (REFLECTCLASSBASEREF)ObjectToOBJECTREF(pValueTypeUNSAFE);
REFLECTCLASSBASEREF refTargetType = (REFLECTCLASSBASEREF)ObjectToOBJECTREF(pTargetTypeUNSAFE);
TypeHandle valueType = refValueType->GetType();
TypeHandle targetType = refTargetType->GetType();
// we are here only if the target type is a primitive, an enum or a pointer
CorElementType targetCorElement = targetType.GetVerifierCorElementType();
BOOL ret = TRUE;
HELPER_METHOD_FRAME_BEGIN_RET_2(refValueType, refTargetType);
// the field type is a pointer
if (targetCorElement == ELEMENT_TYPE_PTR || targetCorElement == ELEMENT_TYPE_FNPTR) {
// the object must be an IntPtr or a System.Reflection.Pointer
if (valueType == TypeHandle(MscorlibBinder::GetClass(CLASS__INTPTR))) {
//
// it's an IntPtr, it's good.
}
//
// it's a System.Reflection.Pointer object
// void* assigns to any pointer. Otherwise the type of the pointer must match
else if (!InvokeUtil::IsVoidPtr(targetType)) {
if (!valueType.CanCastTo(targetType))
ret = FALSE;
}
} else {
// the field type is an enum or a primitive. To have any chance of assignement the object type must
// be an enum or primitive as well.
// So get the internal cor element and that must be the same or widen
CorElementType valueCorElement = valueType.GetVerifierCorElementType();
if (InvokeUtil::IsPrimitiveType(valueCorElement))
ret = (InvokeUtil::CanPrimitiveWiden(targetCorElement, valueCorElement)) ? TRUE : FALSE;
else
ret = FALSE;
}
HELPER_METHOD_FRAME_END();
FC_RETURN_BOOL(ret);
}
FCIMPLEND
FCIMPL3(Object*, ReflectionInvocation::AllocateValueType, ReflectClassBaseObject *pTargetTypeUNSAFE, Object *valueUNSAFE, CLR_BOOL fForceTypeChange) {
CONTRACTL {
FCALL_CHECK;
PRECONDITION(CheckPointer(pTargetTypeUNSAFE));
PRECONDITION(CheckPointer(valueUNSAFE, NULL_OK));
}
CONTRACTL_END;
struct _gc
{
REFLECTCLASSBASEREF refTargetType;
OBJECTREF value;
OBJECTREF obj;
}gc;
gc.value = ObjectToOBJECTREF(valueUNSAFE);
gc.obj = gc.value;
gc.refTargetType = (REFLECTCLASSBASEREF)ObjectToOBJECTREF(pTargetTypeUNSAFE);
TypeHandle targetType = gc.refTargetType->GetType();
HELPER_METHOD_FRAME_BEGIN_RET_PROTECT(gc);
CorElementType targetElementType = targetType.GetSignatureCorElementType();
if (InvokeUtil::IsPrimitiveType(targetElementType) || targetElementType == ELEMENT_TYPE_VALUETYPE)
{
MethodTable* allocMT = targetType.AsMethodTable();
if (gc.value != NULL)
{
// ignore the type of the incoming box if fForceTypeChange is set
// and the target type is not nullable
if (!fForceTypeChange || Nullable::IsNullableType(targetType))
allocMT = gc.value->GetMethodTable();
}
// for null Nullable<T> we don't want a default value being created.
// just allow the null value to be passed, as it will be converted to
// a true nullable
if (!(gc.value == NULL && Nullable::IsNullableType(targetType)))
{
// boxed value type are 'read-only' in the sence that you can't
// only the implementor of the value type can expose mutators.
// To insure byrefs don't mutate value classes in place, we make
// a copy (and if we were not given one, we create a null value type
// instance.
gc.obj = allocMT->Allocate();
if (gc.value != NULL)
CopyValueClassUnchecked(gc.obj->UnBox(), gc.value->UnBox(), allocMT);
}
}
HELPER_METHOD_FRAME_END();
return OBJECTREFToObject(gc.obj);
}
FCIMPLEND
FCIMPL7(void, RuntimeFieldHandle::SetValue, ReflectFieldObject *pFieldUNSAFE, Object *targetUNSAFE, Object *valueUNSAFE, ReflectClassBaseObject *pFieldTypeUNSAFE, DWORD attr, ReflectClassBaseObject *pDeclaringTypeUNSAFE, CLR_BOOL *pDomainInitialized) {
CONTRACTL {
FCALL_CHECK;
}
CONTRACTL_END;
struct _gc {
OBJECTREF target;
OBJECTREF value;
REFLECTCLASSBASEREF fieldType;
REFLECTCLASSBASEREF declaringType;
REFLECTFIELDREF refField;
} gc;
gc.target = ObjectToOBJECTREF(targetUNSAFE);
gc.value = ObjectToOBJECTREF(valueUNSAFE);
gc.fieldType= (REFLECTCLASSBASEREF)ObjectToOBJECTREF(pFieldTypeUNSAFE);
gc.declaringType= (REFLECTCLASSBASEREF)ObjectToOBJECTREF(pDeclaringTypeUNSAFE);
gc.refField = (REFLECTFIELDREF)ObjectToOBJECTREF(pFieldUNSAFE);
if ((gc.fieldType == NULL) || (gc.refField == NULL))
FCThrowResVoid(kArgumentNullException, W("Arg_InvalidHandle"));
TypeHandle fieldType = gc.fieldType->GetType();
TypeHandle declaringType = gc.declaringType != NULL ? gc.declaringType->GetType() : TypeHandle();
Assembly *pAssem;
if (declaringType.IsNull())
{
// global field
pAssem = gc.refField->GetField()->GetModule()->GetAssembly();
}
else
{
pAssem = declaringType.GetAssembly();
}
if (pAssem->IsIntrospectionOnly())
FCThrowExVoid(kInvalidOperationException, IDS_EE_CODEEXECUTION_IN_INTROSPECTIVE_ASSEMBLY, NULL, NULL, NULL);
// We should throw NotSupportedException here.
// But for backward compatibility we are throwing FieldAccessException instead.
if (pAssem->IsDynamic() && !pAssem->HasRunAccess())
FCThrowVoid(kFieldAccessException);
FC_GC_POLL_NOT_NEEDED();
FieldDesc* pFieldDesc = gc.refField->GetField();
HELPER_METHOD_FRAME_BEGIN_PROTECT(gc);
//TODO: cleanup this function
InvokeUtil::SetValidField(fieldType.GetSignatureCorElementType(), fieldType, pFieldDesc, &gc.target, &gc.value, declaringType, pDomainInitialized);
HELPER_METHOD_FRAME_END();
}
FCIMPLEND
//A.CI work
FCIMPL1(Object*, RuntimeTypeHandle::Allocate, ReflectClassBaseObject* pTypeUNSAFE)
{
CONTRACTL {
FCALL_CHECK;
PRECONDITION(CheckPointer(pTypeUNSAFE));
}
CONTRACTL_END
REFLECTCLASSBASEREF refType = (REFLECTCLASSBASEREF)ObjectToOBJECTREF(pTypeUNSAFE);
TypeHandle type = refType->GetType();
// Handle the nullable<T> special case
if (Nullable::IsNullableType(type)) {
return OBJECTREFToObject(Nullable::BoxedNullableNull(type));
}
OBJECTREF rv = NULL;
HELPER_METHOD_FRAME_BEGIN_RET_1(refType);
rv = AllocateObject(type.GetMethodTable());
HELPER_METHOD_FRAME_END();
return OBJECTREFToObject(rv);
}//Allocate
FCIMPLEND
FCIMPL5(Object*, RuntimeTypeHandle::CreateInstance, ReflectClassBaseObject* refThisUNSAFE,
CLR_BOOL publicOnly,
CLR_BOOL wrapExceptions,
CLR_BOOL* pbCanBeCached,
MethodDesc** pConstructor) {
CONTRACTL {
FCALL_CHECK;
PRECONDITION(CheckPointer(refThisUNSAFE));
PRECONDITION(CheckPointer(pbCanBeCached));
PRECONDITION(CheckPointer(pConstructor));
PRECONDITION(*pbCanBeCached == false);
PRECONDITION(*pConstructor == NULL);
}
CONTRACTL_END;
if (refThisUNSAFE == NULL)
FCThrow(kNullReferenceException);
MethodDesc* pMeth;
OBJECTREF rv = NULL;
REFLECTCLASSBASEREF refThis = (REFLECTCLASSBASEREF)ObjectToOBJECTREF(refThisUNSAFE);
TypeHandle thisTH = refThis->GetType();
Assembly *pAssem = thisTH.GetAssembly();
if (pAssem->IsIntrospectionOnly())
FCThrowEx(kInvalidOperationException, IDS_EE_CODEEXECUTION_IN_INTROSPECTIVE_ASSEMBLY, NULL, NULL, NULL);
if (pAssem->IsDynamic() && !pAssem->HasRunAccess())
FCThrowRes(kNotSupportedException, W("NotSupported_DynamicAssemblyNoRunAccess"));
HELPER_METHOD_FRAME_BEGIN_RET_2(rv, refThis);
MethodTable* pVMT;
// Get the type information associated with refThis
if (thisTH.IsNull() || thisTH.IsTypeDesc())
COMPlusThrow(kMissingMethodException,W("Arg_NoDefCTor"));
pVMT = thisTH.AsMethodTable();
pVMT->EnsureInstanceActive();
#ifdef FEATURE_COMINTEROP
// If this is __ComObject then create the underlying COM object.
if (IsComObjectClass(refThis->GetType())) {
#ifdef FEATURE_COMINTEROP_UNMANAGED_ACTIVATION
SyncBlock* pSyncBlock = refThis->GetSyncBlock();
void* pClassFactory = (void*)pSyncBlock->GetInteropInfo()->GetComClassFactory();
if (!pClassFactory)
COMPlusThrow(kInvalidComObjectException, IDS_EE_NO_BACKING_CLASS_FACTORY);
// create an instance of the Com Object
rv = ((ComClassFactory*)pClassFactory)->CreateInstance(NULL);
#else // FEATURE_COMINTEROP_UNMANAGED_ACTIVATION
COMPlusThrow(kInvalidComObjectException, IDS_EE_NO_BACKING_CLASS_FACTORY);
#endif // FEATURE_COMINTEROP_UNMANAGED_ACTIVATION
}
else
#endif // FEATURE_COMINTEROP
{
// if this is an abstract class then we will fail this
if (pVMT->IsAbstract()) {
if (pVMT->IsInterface())
COMPlusThrow(kMissingMethodException,W("Acc_CreateInterface"));
else
COMPlusThrow(kMissingMethodException,W("Acc_CreateAbst"));
}
else if (pVMT->ContainsGenericVariables()) {
COMPlusThrow(kArgumentException,W("Acc_CreateGeneric"));
}
if (pVMT->IsByRefLike())
COMPlusThrow(kNotSupportedException, W("NotSupported_ByRefLike"));
if (pVMT->IsSharedByGenericInstantiations())
COMPlusThrow(kNotSupportedException, W("NotSupported_Type"));
if (!pVMT->HasDefaultConstructor())
{
// We didn't find the parameterless constructor,
// if this is a Value class we can simply allocate one and return it
if (!pVMT->IsValueType()) {
COMPlusThrow(kMissingMethodException,W("Arg_NoDefCTor"));
}
// Handle the nullable<T> special case
if (Nullable::IsNullableType(thisTH)) {
rv = Nullable::BoxedNullableNull(thisTH);
}
else
rv = pVMT->Allocate();
if (!pVMT->Collectible())
{
*pbCanBeCached = true;
}
}
else // !pVMT->HasDefaultConstructor()
{
pMeth = pVMT->GetDefaultConstructor();
// Validate the method can be called by this caller
DWORD attr = pMeth->GetAttrs();
if (!IsMdPublic(attr) && publicOnly)
COMPlusThrow(kMissingMethodException, W("Arg_NoDefCTor"));
// We've got the class, lets allocate it and call the constructor
OBJECTREF o;
bool remoting = false;
o = AllocateObject(pVMT);
GCPROTECT_BEGIN(o);
MethodDescCallSite ctor(pMeth, &o);
// Copy "this" pointer
ARG_SLOT arg;
if (pVMT->IsValueType())
arg = PtrToArgSlot(o->UnBox());
else
arg = ObjToArgSlot(o);
// Call the method
TryCallMethod(&ctor, &arg, wrapExceptions);
rv = o;
GCPROTECT_END();
// No need to set these if they cannot be cached. In particular, if the type is a value type with a custom
// parameterless constructor, don't allow caching and have subsequent calls come back here to allocate an object and
// call the constructor.
if (!remoting && !pVMT->Collectible() && !pVMT->IsValueType())
{
*pbCanBeCached = true;
*pConstructor = pMeth;
}
}
}
HELPER_METHOD_FRAME_END();
return OBJECTREFToObject(rv);
}
FCIMPLEND
FCIMPL2(Object*, RuntimeTypeHandle::CreateInstanceForGenericType, ReflectClassBaseObject* pTypeUNSAFE, ReflectClassBaseObject* pParameterTypeUNSAFE) {
FCALL_CONTRACT;
struct _gc
{
OBJECTREF rv;
REFLECTCLASSBASEREF refType;
REFLECTCLASSBASEREF refParameterType;
} gc;
gc.rv = NULL;
gc.refType = (REFLECTCLASSBASEREF)ObjectToOBJECTREF(pTypeUNSAFE);
gc.refParameterType = (REFLECTCLASSBASEREF)ObjectToOBJECTREF(pParameterTypeUNSAFE);
MethodDesc* pMeth;
TypeHandle genericType = gc.refType->GetType();
TypeHandle parameterHandle = gc.refParameterType->GetType();
_ASSERTE (genericType.HasInstantiation());
HELPER_METHOD_FRAME_BEGIN_RET_PROTECT(gc);
TypeHandle instantiatedType = ((TypeHandle)genericType.GetCanonicalMethodTable()).Instantiate(Instantiation(¶meterHandle, 1));
// Get the type information associated with refThis
MethodTable* pVMT = instantiatedType.GetMethodTable();
_ASSERTE (pVMT != 0 && !instantiatedType.IsTypeDesc());
_ASSERTE(!(pVMT->GetAssembly()->IsDynamic() && !pVMT->GetAssembly()->HasRunAccess()));
_ASSERTE( !pVMT->IsAbstract() ||! instantiatedType.ContainsGenericVariables());
_ASSERTE(!pVMT->IsByRefLike() && pVMT->HasDefaultConstructor());
pMeth = pVMT->GetDefaultConstructor();
MethodDescCallSite ctor(pMeth);
// We've got the class, lets allocate it and call the constructor
// Nullables don't take this path, if they do we need special logic to make an instance
_ASSERTE(!Nullable::IsNullableType(instantiatedType));
gc.rv = instantiatedType.GetMethodTable()->Allocate();
ARG_SLOT arg = ObjToArgSlot(gc.rv);
// Call the method
TryCallMethod(&ctor, &arg, true);
HELPER_METHOD_FRAME_END();
return OBJECTREFToObject(gc.rv);
}
FCIMPLEND
NOINLINE FC_BOOL_RET IsInstanceOfTypeHelper(OBJECTREF obj, REFLECTCLASSBASEREF refType)
{
FCALL_CONTRACT;
BOOL canCast = false;
FC_INNER_PROLOG(RuntimeTypeHandle::IsInstanceOfType);
HELPER_METHOD_FRAME_BEGIN_RET_ATTRIB_2(Frame::FRAME_ATTR_EXACT_DEPTH|Frame::FRAME_ATTR_CAPTURE_DEPTH_2, obj, refType);
canCast = ObjIsInstanceOf(OBJECTREFToObject(obj), refType->GetType());
HELPER_METHOD_FRAME_END();
FC_RETURN_BOOL(canCast);
}
FCIMPL2(FC_BOOL_RET, RuntimeTypeHandle::IsInstanceOfType, ReflectClassBaseObject* pTypeUNSAFE, Object *objectUNSAFE) {
FCALL_CONTRACT;
OBJECTREF obj = ObjectToOBJECTREF(objectUNSAFE);
REFLECTCLASSBASEREF refType = (REFLECTCLASSBASEREF)ObjectToOBJECTREF(pTypeUNSAFE);
// Null is not instance of anything in reflection world
if (obj == NULL)
FC_RETURN_BOOL(false);
if (refType == NULL)
FCThrowRes(kArgumentNullException, W("Arg_InvalidHandle"));
switch (ObjIsInstanceOfNoGC(objectUNSAFE, refType->GetType())) {
case TypeHandle::CanCast:
FC_RETURN_BOOL(true);
case TypeHandle::CannotCast:
FC_RETURN_BOOL(false);
default:
// fall through to the slow helper
break;
}
FC_INNER_RETURN(FC_BOOL_RET, IsInstanceOfTypeHelper(obj, refType));
}
FCIMPLEND
FCIMPL1(DWORD, ReflectionInvocation::GetSpecialSecurityFlags, ReflectMethodObject *pMethodUNSAFE) {
CONTRACTL {
FCALL_CHECK;
}
CONTRACTL_END;
DWORD dwFlags = 0;
struct
{
REFLECTMETHODREF refMethod;
}
gc;
gc.refMethod = (REFLECTMETHODREF)ObjectToOBJECTREF(pMethodUNSAFE);
if (!gc.refMethod)
FCThrowRes(kArgumentNullException, W("Arg_InvalidHandle"));
MethodDesc* pMethod = gc.refMethod->GetMethod();
HELPER_METHOD_FRAME_BEGIN_RET_PROTECT(gc);
// this is an information that is critical for ctors, otherwise is not important
// we get it here anyway to simplify code
MethodTable *pMT = pMethod->GetMethodTable();
_ASSERTE(pMT);
// We should also check the return type here.
// Is there an easier way to get the return type of a method?
MetaSig metaSig(pMethod);
TypeHandle retTH = metaSig.GetRetTypeHandleThrowing();
MethodTable *pRetMT = retTH.GetMethodTable();
// If either the declaring type or the return type contains stack pointers (ByRef or typedbyref),
// the type cannot be boxed and thus cannot be invoked through reflection invocation.
if ( pMT->IsByRefLike() || (pRetMT != NULL && pRetMT->IsByRefLike()) )
dwFlags |= INVOCATION_FLAGS_CONTAINS_STACK_POINTERS;
// Is this a call to a potentially dangerous method? (If so, we're going
// to demand additional permission).
if (InvokeUtil::IsDangerousMethod(pMethod))
dwFlags |= INVOCATION_FLAGS_RISKY_METHOD;
HELPER_METHOD_FRAME_END();
return dwFlags;
}
FCIMPLEND
/****************************************************************************/
/* boxed Nullable<T> are represented as a boxed T, so there is no unboxed
Nullable<T> inside to point at by reference. Because of this a byref
parameters of type Nullable<T> are copied out of the boxed instance
(to a place on the stack), before the call is made (and this copy is
pointed at). After the call returns, this copy must be copied back to
the original argument array. ByRefToNullable, is a simple linked list
that remembers what copy-backs are needed */
struct ByRefToNullable {
unsigned argNum; // The argument number for this byrefNullable argument
void* data; // The data to copy back to the ByRefNullable. This points to the stack
TypeHandle type; // The type of Nullable for this argument
ByRefToNullable* next; // list of these
ByRefToNullable(unsigned aArgNum, void* aData, TypeHandle aType, ByRefToNullable* aNext) {
argNum = aArgNum;
data = aData;
type = aType;
next = aNext;
}
};
void CallDescrWorkerReflectionWrapper(CallDescrData * pCallDescrData, Frame * pFrame)
{
// Use static contracts b/c we have SEH.
STATIC_CONTRACT_THROWS;
STATIC_CONTRACT_GC_TRIGGERS;
STATIC_CONTRACT_MODE_ANY;
struct Param: public NotifyOfCHFFilterWrapperParam
{
CallDescrData * pCallDescrData;
} param;
param.pFrame = pFrame;
param.pCallDescrData = pCallDescrData;
PAL_TRY(Param *, pParam, ¶m)
{
CallDescrWorkerWithHandler(pParam->pCallDescrData);
}
PAL_EXCEPT_FILTER(ReflectionInvocationExceptionFilter)
{
// Should never reach here b/c handler should always continue search.
_ASSERTE(false);
}
PAL_ENDTRY
} // CallDescrWorkerReflectionWrapper
OBJECTREF InvokeArrayConstructor(ArrayTypeDesc* arrayDesc, MethodDesc* pMeth, PTRARRAYREF* objs, int argCnt)
{
CONTRACTL {
THROWS;
GC_TRIGGERS;
MODE_COOPERATIVE;
}
CONTRACTL_END;
DWORD i;
// If we're trying to create an array of pointers or function pointers,
// check that the caller has skip verification permission.
CorElementType et = arrayDesc->GetArrayElementTypeHandle().GetVerifierCorElementType();
// Validate the argCnt an the Rank. Also allow nested SZARRAY's.
_ASSERTE(argCnt == (int) arrayDesc->GetRank() || argCnt == (int) arrayDesc->GetRank() * 2 ||
arrayDesc->GetInternalCorElementType() == ELEMENT_TYPE_SZARRAY);
// Validate all of the parameters. These all typed as integers
int allocSize = 0;
if (!ClrSafeInt<int>::multiply(sizeof(INT32), argCnt, allocSize))
COMPlusThrow(kArgumentException, IDS_EE_SIGTOOCOMPLEX);
INT32* indexes = (INT32*) _alloca((size_t)allocSize);
ZeroMemory(indexes, allocSize);
for (i=0; i<(DWORD)argCnt; i++)
{
if (!(*objs)->m_Array[i])
COMPlusThrowArgumentException(W("parameters"), W("Arg_NullIndex"));
MethodTable* pMT = ((*objs)->m_Array[i])->GetMethodTable();
CorElementType oType = TypeHandle(pMT).GetVerifierCorElementType();
if (!InvokeUtil::IsPrimitiveType(oType) || !InvokeUtil::CanPrimitiveWiden(ELEMENT_TYPE_I4,oType))
COMPlusThrow(kArgumentException,W("Arg_PrimWiden"));
memcpy(&indexes[i],(*objs)->m_Array[i]->UnBox(),pMT->GetNumInstanceFieldBytes());
}
return AllocateArrayEx(TypeHandle(arrayDesc), indexes, argCnt);
}
static BOOL IsActivationNeededForMethodInvoke(MethodDesc * pMD)
{
CONTRACTL {
THROWS;
GC_TRIGGERS;
MODE_COOPERATIVE;
}
CONTRACTL_END;
// The activation for non-generic instance methods is covered by non-null "this pointer"
if (!pMD->IsStatic() && !pMD->HasMethodInstantiation() && !pMD->IsInterface())
return FALSE;
// We need to activate each time for domain neutral types
if (pMD->IsDomainNeutral())
return TRUE;
// We need to activate the instance at least once
pMD->EnsureActive();
return FALSE;
}
class ArgIteratorBaseForMethodInvoke
{
protected:
SIGNATURENATIVEREF * m_ppNativeSig;
FORCEINLINE CorElementType GetReturnType(TypeHandle * pthValueType)
{
WRAPPER_NO_CONTRACT;
return (*pthValueType = (*m_ppNativeSig)->GetReturnTypeHandle()).GetInternalCorElementType();
}
FORCEINLINE CorElementType GetNextArgumentType(DWORD iArg, TypeHandle * pthValueType)
{
WRAPPER_NO_CONTRACT;
return (*pthValueType = (*m_ppNativeSig)->GetArgumentAt(iArg)).GetInternalCorElementType();
}
FORCEINLINE void Reset()
{
LIMITED_METHOD_CONTRACT;
}
public:
BOOL HasThis()
{
LIMITED_METHOD_CONTRACT;
return (*m_ppNativeSig)->HasThis();
}
BOOL HasParamType()
{
LIMITED_METHOD_CONTRACT;
// param type methods are not supported for reflection invoke, so HasParamType is always false for them
return FALSE;
}
BOOL IsVarArg()
{
LIMITED_METHOD_CONTRACT;
// vararg methods are not supported for reflection invoke, so IsVarArg is always false for them
return FALSE;
}
DWORD NumFixedArgs()
{
LIMITED_METHOD_CONTRACT;
return (*m_ppNativeSig)->NumFixedArgs();
}
#ifdef FEATURE_INTERPRETER
BYTE CallConv()
{
LIMITED_METHOD_CONTRACT;
return IMAGE_CEE_CS_CALLCONV_DEFAULT;
}
#endif // FEATURE_INTERPRETER
};
class ArgIteratorForMethodInvoke : public ArgIteratorTemplate<ArgIteratorBaseForMethodInvoke>
{
public:
ArgIteratorForMethodInvoke(SIGNATURENATIVEREF * ppNativeSig)
{
m_ppNativeSig = ppNativeSig;
DWORD dwFlags = (*m_ppNativeSig)->GetArgIteratorFlags();
// Use the cached values if they are available
if (dwFlags & SIZE_OF_ARG_STACK_COMPUTED)
{
m_dwFlags = dwFlags;
m_nSizeOfArgStack = (*m_ppNativeSig)->GetSizeOfArgStack();
return;
}
//
// Compute flags and stack argument size, and cache them for next invocation
//
ForceSigWalk();
if (IsActivationNeededForMethodInvoke((*m_ppNativeSig)->GetMethod()))
{
m_dwFlags |= METHOD_INVOKE_NEEDS_ACTIVATION;
}
(*m_ppNativeSig)->SetSizeOfArgStack(m_nSizeOfArgStack);
_ASSERTE((*m_ppNativeSig)->GetSizeOfArgStack() == m_nSizeOfArgStack);
// This has to be last
(*m_ppNativeSig)->SetArgIteratorFlags(m_dwFlags);
_ASSERTE((*m_ppNativeSig)->GetArgIteratorFlags() == m_dwFlags);
}
BOOL IsActivationNeeded()
{
LIMITED_METHOD_CONTRACT;
return (m_dwFlags & METHOD_INVOKE_NEEDS_ACTIVATION) != 0;
}
};
void DECLSPEC_NORETURN ThrowInvokeMethodException(MethodDesc * pMethod, OBJECTREF targetException)
{
CONTRACTL {
THROWS;
GC_TRIGGERS;
MODE_COOPERATIVE;
}
CONTRACTL_END;
GCPROTECT_BEGIN(targetException);
#if defined(_DEBUG) && !defined(FEATURE_PAL)
if (IsWatsonEnabled())
{
if (!CLRException::IsPreallocatedExceptionObject(targetException))
{
// If the exception is not preallocated, we should be having the
// watson buckets in the throwable already.
if(!((EXCEPTIONREF)targetException)->AreWatsonBucketsPresent())
{
// If an exception is raised by the VM (e.g. type load exception by the JIT) and it comes
// across the reflection invocation boundary before CLR's personality routine for managed
// code has been invoked, then no buckets would be available for us at this point.
//
// Since we cannot assert this, better log it for diagnosis if required.
LOG((LF_EH, LL_INFO100, "InvokeImpl - No watson buckets available - regular exception likely raised within VM and not seen by managed code.\n"));
}
}
else
{
// Exception is preallocated.
PTR_EHWatsonBucketTracker pUEWatsonBucketTracker = GetThread()->GetExceptionState()->GetUEWatsonBucketTracker();
if ((IsThrowableThreadAbortException(targetException) && pUEWatsonBucketTracker->CapturedForThreadAbort())||
(pUEWatsonBucketTracker->CapturedAtReflectionInvocation()))
{
// ReflectionInvocationExceptionFilter would have captured
// the watson bucket details for preallocated exceptions
// in the UE watson bucket tracker.
if(pUEWatsonBucketTracker->RetrieveWatsonBuckets() == NULL)
{
// See comment above
LOG((LF_EH, LL_INFO100, "InvokeImpl - No watson buckets available - preallocated exception likely raised within VM and not seen by managed code.\n"));
}
}
}
}
#endif // _DEBUG && !FEATURE_PAL
#ifdef FEATURE_CORRUPTING_EXCEPTIONS
// Get the corruption severity of the exception that came in through reflection invocation.
CorruptionSeverity severity = GetThread()->GetExceptionState()->GetLastActiveExceptionCorruptionSeverity();
// Since we are dealing with an exception, set the flag indicating if the target of Reflection can handle exception or not.
// This flag is used in CEHelper::CanIDispatchTargetHandleException.
GetThread()->GetExceptionState()->SetCanReflectionTargetHandleException(CEHelper::CanMethodHandleException(severity, pMethod));
#endif // FEATURE_CORRUPTING_EXCEPTIONS
OBJECTREF except = InvokeUtil::CreateTargetExcept(&targetException);
#ifndef FEATURE_PAL
if (IsWatsonEnabled())
{
struct
{
OBJECTREF oExcept;
} gcTIE;
ZeroMemory(&gcTIE, sizeof(gcTIE));
GCPROTECT_BEGIN(gcTIE);
gcTIE.oExcept = except;
_ASSERTE(!CLRException::IsPreallocatedExceptionObject(gcTIE.oExcept));
// If the original exception was preallocated, then copy over the captured
// watson buckets to the TargetInvocationException object, if available.
//
// We dont need to do this if the original exception was not preallocated
// since it already contains the watson buckets inside the object.
if (CLRException::IsPreallocatedExceptionObject(targetException))
{
PTR_EHWatsonBucketTracker pUEWatsonBucketTracker = GetThread()->GetExceptionState()->GetUEWatsonBucketTracker();
BOOL fCopyWatsonBuckets = TRUE;
PTR_VOID pBuckets = pUEWatsonBucketTracker->RetrieveWatsonBuckets();