I have a byte array of a .NET application inside c++ code. I want to execute this .NET application without writing those bytes on the disk. ICLRRuntimeHost::ExecuteInDefaultAppDomain expects a path to the assembly so it's out of the equation here. I'm looking for a possible way (or hack) to pass the binary directly to the clr.
So what i can do ?
//todo error checks/cleanup HRESULT hr; ICLRMetaHost *pMetaHost = NULL; ICLRRuntimeInfo *pRuntimeInfo = NULL; ICorRuntimeHost *pCorRuntimeHost = NULL; IUnknownPtr spAppDomainThunk = NULL; _AppDomainPtr spDefaultAppDomain = NULL; bstr_t bstrAssemblyName(L""); _AssemblyPtr spAssembly = NULL; bstr_t bstrClassName(L""); _TypePtr spType = NULL; variant_t vtEmpty; bstr_t bstrStaticMethodName(L"Main"); variant_t vtLengthRet; hr = CLRCreateInstance(CLSID_CLRMetaHost, IID_PPV_ARGS(&pMetaHost)); const wchar_t* pszVersion = L"v2.0.50727"; hr = pMetaHost->GetRuntime(pszVersion, IID_PPV_ARGS(&pRuntimeInfo)); BOOL fLoadable; hr = pRuntimeInfo->IsLoadable(&fLoadable); if (!fLoadable) { wprintf(L".NET runtime %s cannot be loaded\n", pszVersion); return; } hr = pRuntimeInfo->GetInterface(CLSID_CorRuntimeHost, IID_PPV_ARGS(&pCorRuntimeHost)); hr = pCorRuntimeHost->Start(); hr = pCorRuntimeHost->GetDefaultDomain(&spAppDomainThunk); hr = spAppDomainThunk->QueryInterface(IID_PPV_ARGS(&spDefaultAppDomain)); SAFEARRAYBOUND bounds[1]; bounds[0].cElements = array_len; bounds[0].lLbound = 0; SAFEARRAY* arr = SafeArrayCreate(VT_UI1, 1, bounds); SafeArrayLock(arr); memcpy(arr->pvData, bytearray, array_len); SafeArrayUnlock(arr); hr = spDefaultAppDomain->Load_3(arr, &spAssembly); hr = spAssembly->GetType_2(bstrClassName, &spType); hr = spType->InvokeMember_3(bstrStaticMethodName, static_cast<BindingFlags>(BindingFlags_InvokeMethod | BindingFlags_Static | BindingFlags_Public), NULL, vtEmpty, nullptr, &vtLengthRet); SafeArrayDestroy(arr);
_AppDomaininterface in native C++. Which lets you call its Load(byte[]) method. Use ICorRuntimeHost::GetDefaultDomain().