/* $Id: initterm.cpp 85489 2020-07-28 14:51:29Z vboxsync $ */ /** @file * MS COM / XPCOM Abstraction Layer - Initialization and Termination. */ /* * Copyright (C) 2006-2020 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. */ #define LOG_GROUP LOG_GROUP_MAIN #if !defined(VBOX_WITH_XPCOM) # if !defined(_WIN32_WINNT) || _WIN32_WINNT < 0x600 # undef _WIN32_WINNT # define _WIN32_WINNT 0x600 /* GetModuleHandleExW */ # endif # include # include # include # include #else /* !defined(VBOX_WITH_XPCOM) */ # include # include # include # include # include # include # include # include # include #endif /* !defined(VBOX_WITH_XPCOM) */ #include "VBox/com/com.h" #include "VBox/com/assert.h" #include "VBox/com/NativeEventQueue.h" #include "VBox/com/AutoLock.h" #include "../include/LoggingNew.h" #include #include #include #include #include #include #include #include #include namespace com { #if defined(VBOX_WITH_XPCOM) class DirectoryServiceProvider : public nsIDirectoryServiceProvider { public: NS_DECL_ISUPPORTS DirectoryServiceProvider() : mCompRegLocation(NULL), mXPTIDatLocation(NULL) , mComponentDirLocation(NULL), mCurrProcDirLocation(NULL) {} virtual ~DirectoryServiceProvider(); HRESULT init(const char *aCompRegLocation, const char *aXPTIDatLocation, const char *aComponentDirLocation, const char *aCurrProcDirLocation); NS_DECL_NSIDIRECTORYSERVICEPROVIDER private: /** @remarks This is not a UTF-8 string. */ char *mCompRegLocation; /** @remarks This is not a UTF-8 string. */ char *mXPTIDatLocation; /** @remarks This is not a UTF-8 string. */ char *mComponentDirLocation; /** @remarks This is not a UTF-8 string. */ char *mCurrProcDirLocation; }; NS_IMPL_ISUPPORTS1(DirectoryServiceProvider, nsIDirectoryServiceProvider) DirectoryServiceProvider::~DirectoryServiceProvider() { if (mCompRegLocation) { RTStrFree(mCompRegLocation); mCompRegLocation = NULL; } if (mXPTIDatLocation) { RTStrFree(mXPTIDatLocation); mXPTIDatLocation = NULL; } if (mComponentDirLocation) { RTStrFree(mComponentDirLocation); mComponentDirLocation = NULL; } if (mCurrProcDirLocation) { RTStrFree(mCurrProcDirLocation); mCurrProcDirLocation = NULL; } } /** * @param aCompRegLocation Path to compreg.dat, in Utf8. * @param aXPTIDatLocation Path to xpti.data, in Utf8. */ HRESULT DirectoryServiceProvider::init(const char *aCompRegLocation, const char *aXPTIDatLocation, const char *aComponentDirLocation, const char *aCurrProcDirLocation) { AssertReturn(aCompRegLocation, NS_ERROR_INVALID_ARG); AssertReturn(aXPTIDatLocation, NS_ERROR_INVALID_ARG); /** @todo r=bird: Gotta check how this encoding stuff plays out on darwin! * We get down to [VBoxNsxp]NS_NewNativeLocalFile and that file isn't * nsLocalFileUnix.cpp on 32-bit darwin. On 64-bit darwin it's a question * of what we're doing in IPRT and such... We should probably add a * RTPathConvertToNative for use here. */ int vrc = RTStrUtf8ToCurrentCP(&mCompRegLocation, aCompRegLocation); if (RT_SUCCESS(vrc)) vrc = RTStrUtf8ToCurrentCP(&mXPTIDatLocation, aXPTIDatLocation); if (RT_SUCCESS(vrc) && aComponentDirLocation) vrc = RTStrUtf8ToCurrentCP(&mComponentDirLocation, aComponentDirLocation); if (RT_SUCCESS(vrc) && aCurrProcDirLocation) vrc = RTStrUtf8ToCurrentCP(&mCurrProcDirLocation, aCurrProcDirLocation); return RT_SUCCESS(vrc) ? NS_OK : NS_ERROR_OUT_OF_MEMORY; } NS_IMETHODIMP DirectoryServiceProvider::GetFile(const char *aProp, PRBool *aPersistent, nsIFile **aRetval) { nsCOMPtr localFile; nsresult rv = NS_ERROR_FAILURE; *aRetval = nsnull; *aPersistent = PR_TRUE; const char *fileLocation = NULL; if (strcmp(aProp, NS_XPCOM_COMPONENT_REGISTRY_FILE) == 0) fileLocation = mCompRegLocation; else if (strcmp(aProp, NS_XPCOM_XPTI_REGISTRY_FILE) == 0) fileLocation = mXPTIDatLocation; else if (mComponentDirLocation && strcmp(aProp, NS_XPCOM_COMPONENT_DIR) == 0) fileLocation = mComponentDirLocation; else if (mCurrProcDirLocation && strcmp(aProp, NS_XPCOM_CURRENT_PROCESS_DIR) == 0) fileLocation = mCurrProcDirLocation; else return NS_ERROR_FAILURE; rv = NS_NewNativeLocalFile(nsEmbedCString(fileLocation), PR_TRUE, getter_AddRefs(localFile)); if (NS_FAILED(rv)) return rv; return localFile->QueryInterface(NS_GET_IID(nsIFile), (void **)aRetval); } /** * Global XPCOM initialization flag (we maintain it ourselves since XPCOM * doesn't provide such functionality) */ static bool volatile gIsXPCOMInitialized = false; /** * Number of Initialize() calls on the main thread. */ static unsigned int gXPCOMInitCount = 0; #else /* !defined(VBOX_WITH_XPCOM) */ /** * Replacement function for the InvokeStub method for the IRundown stub. */ static HRESULT STDMETHODCALLTYPE Rundown_InvokeStub(IRpcStubBuffer *pThis, RPCOLEMESSAGE *pMsg, IRpcChannelBuffer *pBuf) RT_NOTHROW_DEF { /* * Our mission here is to prevent remote calls to methods #8 and #9, * as these contain raw pointers to callback functions. * * Note! APIs like I_RpcServerInqTransportType, I_RpcBindingInqLocalClientPID * and RpcServerInqCallAttributesW are not usable in this context without * a rpc binding handle (latter two). * * P.S. In more recent windows versions, the buffer implements a interface * IID_IRpcChannelBufferMarshalingContext (undocumented) which has a * GetIMarshallingContextAttribute() method that will return the client PID * when asking for attribute #0x8000000e. */ uint32_t const iMethod = pMsg->iMethod & 0xffff; /* Uncertain, but there are hints that the upper bits are flags. */ HRESULT hrc; if ( ( iMethod != 8 && iMethod != 9) || (pMsg->rpcFlags & RPCFLG_LOCAL_CALL) ) hrc = CStdStubBuffer_Invoke(pThis, pMsg, pBuf); else { LogRel(("Rundown_InvokeStub: Rejected call to CRundown::%s: rpcFlags=%#x cbBuffer=%#x dataRepresentation=%d buffer=%p:{%.*Rhxs} reserved1=%p reserved2={%p,%p,%p,%p,%p}\n", pMsg->iMethod == 8 ? "DoCallback" : "DoNonreentrantCallback", pMsg->rpcFlags, pMsg->cbBuffer, pMsg->dataRepresentation, pMsg->Buffer, RT_VALID_PTR(pMsg->Buffer) ? pMsg->cbBuffer : 0, pMsg->Buffer, pMsg->reserved1, pMsg->reserved2[0], pMsg->reserved2[1], pMsg->reserved2[2], pMsg->reserved2[3], pMsg->reserved2[4])); hrc = E_ACCESSDENIED; } return hrc; } /** * Replaces the IRundown InvokeStub method with Rundown_InvokeStub so we can * reject remote calls to a couple of misdesigned methods. */ void PatchComBugs(void) { static volatile bool s_fPatched = false; if (s_fPatched) return; /* * The combase.dll / ole32.dll is exporting a DllGetClassObject function * that is implemented using NdrDllGetClassObject just like our own * proxy/stub DLL. This means we can get at the stub interface lists, * since what NdrDllGetClassObject has CStdPSFactoryBuffer as layout. * * Note! Tried using CoRegisterPSClsid instead of this mess, but no luck. */ /* Locate the COM DLL, it must be loaded by now: */ HMODULE hmod = GetModuleHandleW(L"COMBASE.DLL"); if (!hmod) hmod = GetModuleHandleW(L"OLE32.DLL"); /* w7 */ AssertReturnVoid(hmod != NULL); /* Resolve the class getter: */ LPFNGETCLASSOBJECT pfnGetClassObject = (LPFNGETCLASSOBJECT)GetProcAddress(hmod, "DllGetClassObject"); AssertReturnVoid(pfnGetClassObject != NULL); /* Get the factory instance: */ static const CLSID s_PSOlePrx32ClsId = {0x00000320,0x0000,0x0000,{0xc0,0x00,0x00,0x00,0x00,0x00,0x00,0x46}}; CStdPSFactoryBuffer *pFactoryBuffer = NULL; HRESULT hrc = pfnGetClassObject(s_PSOlePrx32ClsId, IID_IPSFactoryBuffer, (void **)&pFactoryBuffer); AssertMsgReturnVoid(SUCCEEDED(hrc), ("hrc=%Rhrc\n", hrc)); AssertReturnVoid(pFactoryBuffer != NULL); /* * Search thru the file list for the interface we want to patch. */ static const IID s_IID_Rundown = {0x00000134,0x0000,0x0000,{0xc0,0x00,0x00,0x00,0x00,0x00,0x00,0x46}}; decltype(CStdStubBuffer_Invoke) *pfnInvoke = (decltype(pfnInvoke))GetProcAddress(hmod, "CStdStubBuffer_Invoke"); if (!pfnInvoke) pfnInvoke = (decltype(pfnInvoke))GetProcAddress(GetModuleHandleW(L"RPCRT4.DLL"), "CStdStubBuffer_Invoke"); unsigned cPatched = 0; unsigned cAlreadyPatched = 0; Assert(pFactoryBuffer->pProxyFileList != NULL); for (ProxyFileInfo const **ppCur = pFactoryBuffer->pProxyFileList; *ppCur != NULL; ppCur++) { ProxyFileInfo const *pCur = *ppCur; if (pCur->pStubVtblList) { for (PCInterfaceStubVtblList const *ppCurStub = pCur->pStubVtblList; *ppCurStub != NULL; ppCurStub++) { PCInterfaceStubVtblList const pCurStub = *ppCurStub; IID const *piid = pCurStub->header.piid; if (piid) { if (IsEqualIID(*piid, s_IID_Rundown)) { if (pCurStub->Vtbl.Invoke == pfnInvoke) { DWORD fOld = 0; if (VirtualProtect(&pCurStub->Vtbl.Invoke, sizeof(pCurStub->Vtbl.Invoke), PAGE_READWRITE, &fOld)) { pCurStub->Vtbl.Invoke = Rundown_InvokeStub; VirtualProtect(&pCurStub->Vtbl.Invoke, sizeof(pCurStub->Vtbl.Invoke), fOld, &fOld); cPatched++; } else AssertMsgFailed(("%d\n", GetLastError())); } else cAlreadyPatched++; } } } } } /* done */ pFactoryBuffer->lpVtbl->Release((IPSFactoryBuffer *)pFactoryBuffer); /* * If we patched anything we should try prevent being unloaded. */ if (cPatched > 0) { s_fPatched = true; HMODULE hmodSelf; AssertLogRelMsg(GetModuleHandleExW(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_PIN, (LPCWSTR)(uintptr_t)Rundown_InvokeStub, &hmodSelf), ("last error: %u; Rundown_InvokeStub=%p\n", GetLastError(), Rundown_InvokeStub)); } else AssertLogRelMsg(cAlreadyPatched > 0, ("COM patching of IRundown failed!\n")); } /** * The COM main thread handle. (The first caller of com::Initialize().) */ static RTTHREAD volatile gCOMMainThread = NIL_RTTHREAD; /** * Number of Initialize() calls on the main thread. */ static uint32_t gCOMMainInitCount = 0; #endif /* !defined(VBOX_WITH_XPCOM) */ /** * Initializes the COM runtime. * * This method must be called on each thread of the client application that * wants to access COM facilities. The initialization must be performed before * calling any other COM method or attempting to instantiate COM objects. * * On platforms using XPCOM, this method uses the following scheme to search for * XPCOM runtime: * * 1. If the VBOX_APP_HOME environment variable is set, the path it specifies * is used to search XPCOM libraries and components. If this method fails to * initialize XPCOM runtime using this path, it will immediately return a * failure and will NOT check for other paths as described below. * * 2. If VBOX_APP_HOME is not set, this methods tries the following paths in the * given order: * * a) Compiled-in application data directory (as returned by * RTPathAppPrivateArch()) * b) "/usr/lib/virtualbox" (Linux only) * c) "/opt/VirtualBox" (Linux only) * * The first path for which the initialization succeeds will be used. * * On MS COM platforms, the COM runtime is provided by the system and does not * need to be searched for. * * Once the COM subsystem is no longer necessary on a given thread, Shutdown() * must be called to free resources allocated for it. Note that a thread may * call Initialize() several times but for each of tese calls there must be a * corresponding Shutdown() call. * * @return S_OK on success and a COM result code in case of failure. */ HRESULT Initialize(uint32_t fInitFlags /*=VBOX_COM_INIT_F_DEFAULT*/) { HRESULT rc = E_FAIL; #if !defined(VBOX_WITH_XPCOM) # ifdef VBOX_WITH_AUTO_COM_REG_UPDATE /* * First time we're called in a process, we refresh the VBox COM * registrations. Use a global mutex to prevent updating when there are * API users already active, as that could lead to a bit of a mess. */ if ( (fInitFlags & VBOX_COM_INIT_F_AUTO_REG_UPDATE) && gCOMMainThread == NIL_RTTHREAD) { SetLastError(ERROR_SUCCESS); HANDLE hLeakIt = CreateMutexW(NULL/*pSecAttr*/, FALSE, L"Global\\VirtualBoxComLazyRegistrationMutant"); DWORD dwErr = GetLastError(); AssertMsg(dwErr == ERROR_SUCCESS || dwErr == ERROR_ALREADY_EXISTS || dwErr == ERROR_ACCESS_DENIED, ("%u\n", dwErr)); if (dwErr == ERROR_SUCCESS) { char szPath[RTPATH_MAX]; int vrc = RTPathAppPrivateArch(szPath, sizeof(szPath)); if (RT_SUCCESS(vrc)) # ifndef VBOX_IN_32_ON_64_MAIN_API vrc = RTPathAppend(szPath, sizeof(szPath), RT_MAKE_U64(((PKUSER_SHARED_DATA)MM_SHARED_USER_DATA_VA)->NtMinorVersion, ((PKUSER_SHARED_DATA)MM_SHARED_USER_DATA_VA)->NtMajorVersion) >= RT_MAKE_U64(1/*Lo*/,6/*Hi*/) ? "VBoxProxyStub.dll" : "VBoxProxyStubLegacy.dll"); # else vrc = RTPathAppend(szPath, sizeof(szPath), "x86\\VBoxProxyStub-x86.dll"); # endif if (RT_SUCCESS(vrc)) { RTLDRMOD hMod; vrc = RTLdrLoad(szPath, &hMod); if (RT_SUCCESS(vrc)) { union { void *pv; DECLCALLBACKMEMBER(uint32_t, pfnRegUpdate,(void)); } u; vrc = RTLdrGetSymbol(hMod, "VbpsUpdateRegistrations", &u.pv); if (RT_SUCCESS(vrc)) u.pfnRegUpdate(); /* Just keep it loaded. */ } } Assert(hLeakIt != NULL); NOREF(hLeakIt); } } # endif /* * We initialize COM in GUI thread in STA, to be compliant with QT and * OLE requirments (for example to allow D&D), while other threads * initialized in regular MTA. To allow fast proxyless access from * GUI thread to COM objects, we explicitly provide our COM objects * with free threaded marshaller. * !!!!! Please think twice before touching this code !!!!! */ DWORD flags = fInitFlags & VBOX_COM_INIT_F_GUI ? COINIT_APARTMENTTHREADED | COINIT_SPEED_OVER_MEMORY : COINIT_MULTITHREADED | COINIT_DISABLE_OLE1DDE | COINIT_SPEED_OVER_MEMORY; rc = CoInitializeEx(NULL, flags); /* the overall result must be either S_OK or S_FALSE (S_FALSE means * "already initialized using the same apartment model") */ AssertMsg(rc == S_OK || rc == S_FALSE, ("rc=%08X\n", rc)); #if defined(VBOX_WITH_SDS) // Setup COM Security to enable impersonation HRESULT hrGUICoInitializeSecurity = CoInitializeSecurity(NULL, -1, NULL, NULL, RPC_C_AUTHN_LEVEL_DEFAULT, RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE, NULL); NOREF(hrGUICoInitializeSecurity); Assert(SUCCEEDED(hrGUICoInitializeSecurity) || hrGUICoInitializeSecurity == RPC_E_TOO_LATE); #endif /* * IRundown has unsafe two methods we need to patch to prevent remote access. * Do that before we start using COM and open ourselves to possible attacks. */ if (!(fInitFlags & VBOX_COM_INIT_F_NO_COM_PATCHING)) PatchComBugs(); /* To be flow compatible with the XPCOM case, we return here if this isn't * the main thread or if it isn't its first initialization call. * Note! CoInitializeEx and CoUninitialize does it's own reference * counting, so this exercise is entirely for the EventQueue init. */ bool fRc; RTTHREAD hSelf = RTThreadSelf(); if (hSelf != NIL_RTTHREAD) ASMAtomicCmpXchgHandle(&gCOMMainThread, hSelf, NIL_RTTHREAD, fRc); else fRc = false; if (fInitFlags & VBOX_COM_INIT_F_GUI) Assert(RTThreadIsMain(hSelf)); if (!fRc) { if ( gCOMMainThread == hSelf && SUCCEEDED(rc)) gCOMMainInitCount++; AssertComRC(rc); return rc; } Assert(RTThreadIsMain(hSelf)); /* this is the first main thread initialization */ Assert(gCOMMainInitCount == 0); if (SUCCEEDED(rc)) gCOMMainInitCount = 1; #else /* !defined(VBOX_WITH_XPCOM) */ /* Unused here */ RT_NOREF(fInitFlags); if (ASMAtomicXchgBool(&gIsXPCOMInitialized, true) == true) { /* XPCOM is already initialized on the main thread, no special * initialization is necessary on additional threads. Just increase * the init counter if it's a main thread again (to correctly support * nested calls to Initialize()/Shutdown() for compatibility with * Win32). */ nsCOMPtr eventQ; rc = NS_GetMainEventQ(getter_AddRefs(eventQ)); if (NS_SUCCEEDED(rc)) { PRBool isOnMainThread = PR_FALSE; rc = eventQ->IsOnCurrentThread(&isOnMainThread); if (NS_SUCCEEDED(rc) && isOnMainThread) ++gXPCOMInitCount; } AssertComRC(rc); return rc; } Assert(RTThreadIsMain(RTThreadSelf())); /* this is the first initialization */ gXPCOMInitCount = 1; /* prepare paths for registry files */ char szCompReg[RTPATH_MAX]; char szXptiDat[RTPATH_MAX]; int vrc = GetVBoxUserHomeDirectory(szCompReg, sizeof(szCompReg)); if (vrc == VERR_ACCESS_DENIED) return NS_ERROR_FILE_ACCESS_DENIED; AssertRCReturn(vrc, NS_ERROR_FAILURE); vrc = RTStrCopy(szXptiDat, sizeof(szXptiDat), szCompReg); AssertRCReturn(vrc, NS_ERROR_FAILURE); # ifdef VBOX_IN_32_ON_64_MAIN_API vrc = RTPathAppend(szCompReg, sizeof(szCompReg), "compreg-x86.dat"); AssertRCReturn(vrc, NS_ERROR_FAILURE); vrc = RTPathAppend(szXptiDat, sizeof(szXptiDat), "xpti-x86.dat"); AssertRCReturn(vrc, NS_ERROR_FAILURE); # else vrc = RTPathAppend(szCompReg, sizeof(szCompReg), "compreg.dat"); AssertRCReturn(vrc, NS_ERROR_FAILURE); vrc = RTPathAppend(szXptiDat, sizeof(szXptiDat), "xpti.dat"); AssertRCReturn(vrc, NS_ERROR_FAILURE); # endif LogFlowFunc(("component registry : \"%s\"\n", szCompReg)); LogFlowFunc(("XPTI data file : \"%s\"\n", szXptiDat)); static const char *kAppPathsToProbe[] = { NULL, /* 0: will use VBOX_APP_HOME */ NULL, /* 1: will try RTPathAppPrivateArch(), correctly installed release builds will never go further */ NULL, /* 2: will try parent directory of RTPathAppPrivateArch(), only for testcases in non-hardened builds */ /* There used to be hard coded paths, but they only caused trouble * because they often led to mixing of builds or even versions. * If you feel tempted to add anything here, think again. They would * only be used if option 1 would not work, which is a sign of a big * problem, as it returns a fixed location defined at compile time. * It is better to fail than blindly trying to cover the problem. */ }; /* Find out the directory where VirtualBox binaries are located */ for (size_t i = 0; i < RT_ELEMENTS(kAppPathsToProbe); ++ i) { char szAppHomeDir[RTPATH_MAX]; if (i == 0) { /* Use VBOX_APP_HOME if present */ vrc = RTEnvGetEx(RTENV_DEFAULT, "VBOX_APP_HOME", szAppHomeDir, sizeof(szAppHomeDir), NULL); if (vrc == VERR_ENV_VAR_NOT_FOUND) continue; AssertRC(vrc); } else if (i == 1) { /* Use RTPathAppPrivateArch() first */ vrc = RTPathAppPrivateArch(szAppHomeDir, sizeof(szAppHomeDir)); AssertRC(vrc); } else if (i == 2) { # ifdef VBOX_WITH_HARDENING continue; # else /* !VBOX_WITH_HARDENING */ /* Use parent of RTPathAppPrivateArch() if ends with "testcase" */ vrc = RTPathAppPrivateArch(szAppHomeDir, sizeof(szAppHomeDir)); AssertRC(vrc); vrc = RTPathStripTrailingSlash(szAppHomeDir); AssertRC(vrc); char *filename = RTPathFilename(szAppHomeDir); if (!filename || strcmp(filename, "testcase")) continue; RTPathStripFilename(szAppHomeDir); # endif /* !VBOX_WITH_HARDENING */ } else { /* Iterate over all other paths */ RTStrCopy(szAppHomeDir, sizeof(szAppHomeDir), kAppPathsToProbe[i]); vrc = VINF_SUCCESS; } if (RT_FAILURE(vrc)) { rc = NS_ERROR_FAILURE; continue; } char szCompDir[RTPATH_MAX]; vrc = RTStrCopy(szCompDir, sizeof(szCompDir), szAppHomeDir); if (RT_FAILURE(vrc)) { rc = NS_ERROR_FAILURE; continue; } vrc = RTPathAppend(szCompDir, sizeof(szCompDir), "components"); if (RT_FAILURE(vrc)) { rc = NS_ERROR_FAILURE; continue; } LogFlowFunc(("component directory : \"%s\"\n", szCompDir)); nsCOMPtr dsProv; dsProv = new DirectoryServiceProvider(); if (dsProv) rc = dsProv->init(szCompReg, szXptiDat, szCompDir, szAppHomeDir); else rc = NS_ERROR_OUT_OF_MEMORY; if (NS_FAILED(rc)) break; /* Setup the application path for NS_InitXPCOM2. Note that we properly * answer the NS_XPCOM_CURRENT_PROCESS_DIR query in our directory * service provider but it seems to be activated after the directory * service is used for the first time (see the source NS_InitXPCOM2). So * use the same value here to be on the safe side. */ nsCOMPtr appDir; { char *appDirCP = NULL; vrc = RTStrUtf8ToCurrentCP(&appDirCP, szAppHomeDir); if (RT_SUCCESS(vrc)) { nsCOMPtr file; rc = NS_NewNativeLocalFile(nsEmbedCString(appDirCP), PR_FALSE, getter_AddRefs(file)); if (NS_SUCCEEDED(rc)) appDir = do_QueryInterface(file, &rc); RTStrFree(appDirCP); } else rc = NS_ERROR_FAILURE; } if (NS_FAILED(rc)) break; /* Set VBOX_XPCOM_HOME to the same app path to make XPCOM sources that * still use it instead of the directory service happy */ vrc = RTEnvSetEx(RTENV_DEFAULT, "VBOX_XPCOM_HOME", szAppHomeDir); AssertRC(vrc); /* Finally, initialize XPCOM */ { nsCOMPtr serviceManager; rc = NS_InitXPCOM2(getter_AddRefs(serviceManager), appDir, dsProv); if (NS_SUCCEEDED(rc)) { nsCOMPtr registrar = do_QueryInterface(serviceManager, &rc); if (NS_SUCCEEDED(rc)) { rc = registrar->AutoRegister(nsnull); if (NS_SUCCEEDED(rc)) { /* We succeeded, stop probing paths */ LogFlowFunc(("Succeeded.\n")); break; } } } } /* clean up before the new try */ HRESULT rc2 = NS_ShutdownXPCOM(nsnull); if (SUCCEEDED(rc)) rc = rc2; if (i == 0) { /* We failed with VBOX_APP_HOME, don't probe other paths */ break; } } #endif /* !defined(VBOX_WITH_XPCOM) */ AssertComRCReturnRC(rc); // for both COM and XPCOM, we only get here if this is the main thread; // only then initialize the autolock system (AutoLock.cpp) Assert(RTThreadIsMain(RTThreadSelf())); util::InitAutoLockSystem(); /* * Init the main event queue (ASSUMES it cannot fail). */ if (SUCCEEDED(rc)) NativeEventQueue::init(); return rc; } HRESULT Shutdown() { HRESULT rc = S_OK; #if !defined(VBOX_WITH_XPCOM) /* EventQueue::uninit reference counting fun. */ RTTHREAD hSelf = RTThreadSelf(); if ( hSelf == gCOMMainThread && hSelf != NIL_RTTHREAD) { if (-- gCOMMainInitCount == 0) { NativeEventQueue::uninit(); ASMAtomicWriteHandle(&gCOMMainThread, NIL_RTTHREAD); } } CoUninitialize(); #else /* !defined(VBOX_WITH_XPCOM) */ nsCOMPtr eventQ; rc = NS_GetMainEventQ(getter_AddRefs(eventQ)); if (NS_SUCCEEDED(rc) || rc == NS_ERROR_NOT_AVAILABLE) { /* NS_ERROR_NOT_AVAILABLE seems to mean that * nsIEventQueue::StopAcceptingEvents() has been called (see * nsEventQueueService.cpp). We hope that this error code always means * just that in this case and assume that we're on the main thread * (it's a kind of unexpected behavior if a non-main thread ever calls * StopAcceptingEvents() on the main event queue). */ PRBool isOnMainThread = PR_FALSE; if (NS_SUCCEEDED(rc)) { rc = eventQ->IsOnCurrentThread(&isOnMainThread); eventQ = nsnull; /* early release before shutdown */ } else { isOnMainThread = RTThreadIsMain(RTThreadSelf()); rc = NS_OK; } if (NS_SUCCEEDED(rc) && isOnMainThread) { /* only the main thread needs to uninitialize XPCOM and only if * init counter drops to zero */ if (--gXPCOMInitCount == 0) { NativeEventQueue::uninit(); rc = NS_ShutdownXPCOM(nsnull); /* This is a thread initialized XPCOM and set gIsXPCOMInitialized to * true. Reset it back to false. */ bool wasInited = ASMAtomicXchgBool(&gIsXPCOMInitialized, false); Assert(wasInited == true); NOREF(wasInited); } } } #endif /* !defined(VBOX_WITH_XPCOM) */ AssertComRC(rc); return rc; } } /* namespace com */