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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.
//
// RtlFunctions.CPP
//
//
// Various functions for interacting with ntdll.
//
//
// Precompiled Header
#include "common.h"
#include "rtlfunctions.h"
#ifdef _TARGET_AMD64_
RtlVirtualUnwindFn* RtlVirtualUnwind_Unsafe = NULL;
HRESULT EnsureRtlFunctions()
{
CONTRACTL
{
NOTHROW;
GC_TRIGGERS;
MODE_ANY;
}
CONTRACTL_END;
HMODULE hModuleNtDll = CLRLoadLibrary(W("ntdll"));
if (hModuleNtDll == NULL)
return E_FAIL;
#define ENSURE_FUNCTION_RENAME(clrname, ntname) \
if (NULL == clrname) { clrname = (ntname##Fn*)GetProcAddress(hModuleNtDll, #ntname); } \
if (NULL == clrname) { return E_FAIL; } \
{ }
ENSURE_FUNCTION_RENAME(RtlVirtualUnwind_Unsafe, RtlVirtualUnwind );
return S_OK;
}
#else // _TARGET_AMD64_
HRESULT EnsureRtlFunctions()
{
LIMITED_METHOD_CONTRACT;
return S_OK;
}
#endif // _TARGET_AMD64_
#if defined(WIN64EXCEPTIONS)
VOID InstallEEFunctionTable (
PVOID pvTableID,
PVOID pvStartRange,
ULONG cbRange,
PGET_RUNTIME_FUNCTION_CALLBACK pfnGetRuntimeFunctionCallback,
PVOID pvContext,
EEDynamicFunctionTableType TableType)
{
CONTRACTL
{
THROWS;
GC_NOTRIGGER;
MODE_ANY;
PRECONDITION(cbRange <= DYNAMIC_FUNCTION_TABLE_MAX_RANGE);
}
CONTRACTL_END;
static LPWSTR wszModuleName = NULL;
static WCHAR rgwModuleName[MAX_LONGPATH] = { 0 };
if (wszModuleName == NULL)
{
StackSString ssTempName;
DWORD dwTempNameSize;
// Leaves trailing backslash on path, producing something like "c:\windows\microsoft.net\framework\v4.0.x86dbg\"
LPCWSTR pszSysDir = GetInternalSystemDirectory(&dwTempNameSize);
//finish creating complete path and copy to buffer if we can
if (pszSysDir == NULL)
{ // The CLR should become unavailable in this case.
EEPOLICY_HANDLE_FATAL_ERROR(COR_E_EXECUTIONENGINE);
}
ssTempName.Set(pszSysDir);
ssTempName.Append(MAIN_DAC_MODULE_DLL_NAME_W);
if (ssTempName.GetCount() < MAX_LONGPATH)
{
wcscpy_s(rgwModuleName, MAX_LONGPATH, ssTempName.GetUnicode());
// publish result
InterlockedExchangeT(&wszModuleName, rgwModuleName);
}
else
{
NewArrayHolder<WCHAR> wzTempName(DuplicateStringThrowing(ssTempName.GetUnicode()));
// publish result
if (InterlockedCompareExchangeT(&wszModuleName, (LPWSTR)wzTempName, nullptr) == nullptr)
{
wzTempName.SuppressRelease();
}
}
}
if (!RtlInstallFunctionTableCallback(
((ULONG_PTR)pvTableID) | 3, // the low 2 bits must be set so NT knows
// it's not really a pointer. See
// DeleteEEFunctionTable.
(ULONG_PTR)pvStartRange,
cbRange,
pfnGetRuntimeFunctionCallback,
EncodeDynamicFunctionTableContext(pvContext, TableType),
wszModuleName))
{
COMPlusThrowOM();
}
}
#endif // WIN64EXCEPTIONS
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