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//
// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
//
// Just the subset of functionality from the MscorlibBinder necessary for exceptions.
#include "common.h"
#include "frameworkexceptionloader.h"
struct ExceptionLocationData
{
LPCUTF8 Namespace;
LPCUTF8 Name;
LPCUTF8 AssemblySimpleName;
LPCUTF8 PublicKeyToken;
};
static const
ExceptionLocationData g_ExceptionLocationData[] = {
#define DEFINE_EXCEPTION(ns, reKind, bHRformessage, ...)
#define DEFINE_EXCEPTION_HR_WINRT_ONLY(ns, reKind, ...)
#define DEFINE_EXCEPTION_IN_OTHER_FX_ASSEMBLY(ns, reKind, assemblySimpleName, publicKeyToken, bHRformessage, ...) { ns, PTR_CSTR((TADDR) # reKind), assemblySimpleName, publicKeyToken },
#include "rexcep.h"
{NULL, NULL, NULL, NULL} // On Silverlight, this table may be empty. This dummy entry allows us to compile.
};
// Note that some assemblies, like System.Runtime.WindowsRuntime, might not be installed on pre-Windows 8 machines.
// This may return null.
MethodTable* FrameworkExceptionLoader::GetException(RuntimeExceptionKind kind)
{
CONTRACTL
{
THROWS;
GC_TRIGGERS;
PRECONDITION(kind > kLastExceptionInMscorlib);
PRECONDITION(kind - (kLastExceptionInMscorlib + 1) < COUNTOF(g_ExceptionLocationData) - 1);
}
CONTRACTL_END;
// This is for loading rarely-used exception objects in arbitrary appdomains.
// The loader should do caching - let's not create a multi-appdomain cache of these exception types here.
// Note that some assemblies, like System.Runtime.WindowsRuntime, might not be installed on pre-Windows 8 machines.
int index = kind - (kLastExceptionInMscorlib + 1);
ExceptionLocationData exData = g_ExceptionLocationData[index];
_ASSERTE(exData.Name != NULL && exData.AssemblySimpleName != NULL && exData.PublicKeyToken != NULL); // Was the exception defined in mscorlib instead?
StackSString assemblyQualifiedName;
_ASSERTE(exData.Namespace != NULL); // If we need to support stuff in a global namespace, fix this.
assemblyQualifiedName.SetUTF8(exData.Namespace);
assemblyQualifiedName.AppendUTF8(".");
assemblyQualifiedName.AppendUTF8(exData.Name);
assemblyQualifiedName.AppendUTF8(", ");
assemblyQualifiedName.AppendUTF8(exData.AssemblySimpleName);
assemblyQualifiedName.AppendUTF8(", PublicKeyToken=");
assemblyQualifiedName.AppendUTF8(exData.PublicKeyToken);
assemblyQualifiedName.AppendUTF8(", Version=");
assemblyQualifiedName.AppendUTF8(VER_ASSEMBLYVERSION_STR);
assemblyQualifiedName.AppendUTF8(", Culture=neutral");
MethodTable* pMT = NULL;
// Loading will either succeed or throw a FileLoadException. Catch & swallow that exception.
EX_TRY
{
pMT = TypeName::GetTypeFromAsmQualifiedName(assemblyQualifiedName.GetUnicode(), FALSE).GetMethodTable();
// Since this type is from another assembly, we must ensure that assembly has been sufficiently loaded.
pMT->EnsureActive();
}
EX_CATCH
{
Exception *ex = GET_EXCEPTION();
// Let non-file-not-found execeptions propagate
if (EEFileLoadException::GetFileLoadKind(ex->GetHR()) != kFileNotFoundException)
EX_RETHROW;
// Return COMException if we can't load the assembly we expect.
pMT = MscorlibBinder::GetException(kCOMException);
}
EX_END_CATCH(RethrowTerminalExceptions);
return pMT;
}
void FrameworkExceptionLoader::GetExceptionName(RuntimeExceptionKind kind, SString & exceptionName)
{
CONTRACTL {
THROWS;
GC_NOTRIGGER;
MODE_ANY;
PRECONDITION(kind > kLastExceptionInMscorlib);
PRECONDITION(kind - (kLastExceptionInMscorlib + 1) < COUNTOF(g_ExceptionLocationData) - 1);
} CONTRACTL_END;
exceptionName.SetUTF8(g_ExceptionLocationData[kind].Namespace);
exceptionName.AppendUTF8(".");
exceptionName.AppendUTF8(g_ExceptionLocationData[kind].Name);
}
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