VBoxServicePageSharing.cpp revision 1a9a40add2c78bba007e3f5c876859967a8e9edf
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * VBoxService - Guest page sharing.
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * Copyright (C) 2006-2012 Oracle Corporation
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * available from http://www.virtualbox.org. This file is free software;
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * you can redistribute it and/or modify it under the terms of the GNU
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * General Public License (GPL) as published by the Free Software
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync/*******************************************************************************
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync* Header Files *
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync*******************************************************************************/
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync/*******************************************************************************
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync* Global Variables *
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync*******************************************************************************/
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync/** The semaphore we're blocking on. */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsyncstatic RTSEMEVENTMULTI g_PageSharingEvent = NIL_RTSEMEVENTMULTI;
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsynctypedef struct
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync} RTL_PROCESS_MODULE_INFORMATION, *PRTL_PROCESS_MODULE_INFORMATION;
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsynctypedef NTSTATUS (WINAPI *PFNZWQUERYSYSTEMINFORMATION)(ULONG, PVOID, ULONG, PULONG);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsyncstatic PFNZWQUERYSYSTEMINFORMATION g_pfnZwQuerySystemInformation = NULL;
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsyncstatic DECLCALLBACK(int) VBoxServicePageSharingEmptyTreeCallback(PAVLPVNODECORE pNode, void *pvUser);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * Registers a new module with the VMM
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * @param pModule Module ptr
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * @param fValidateMemory Validate/touch memory pages or not
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsyncvoid VBoxServicePageSharingRegisterModule(PKNOWN_MODULE pModule, bool fValidateMemory)
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VMMDEVSHAREDREGIONDESC aRegions[VMMDEVSHAREDREGIONDESC_MAX];
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(3, "VBoxServicePageSharingRegisterModule\n");
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync cbVersionSize = GetFileVersionInfoSize(pModule->Info.szExePath, &dummy);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(3, "VBoxServicePageSharingRegisterModule: GetFileVersionInfoSize failed with %d\n", GetLastError());
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync if (!GetFileVersionInfo(pModule->Info.szExePath, 0, cbVersionSize, pVersionInfo))
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(3, "VBoxServicePageSharingRegisterModule: GetFileVersionInfo failed with %d\n", GetLastError());
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync /* Fetch default code page. */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync BOOL ret = VerQueryValue(pVersionInfo, TEXT("\\VarFileInfo\\Translation"), (LPVOID *)&lpTranslate, &cbTranslate);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(3, "VBoxServicePageSharingRegisterModule: VerQueryValue failed with %d (cb=%d)\n", GetLastError(), cbTranslate);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync unsigned i;
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync unsigned cTranslationBlocks = cbTranslate/sizeof(struct LANGANDCODEPAGE);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync for(i = 0; i < cTranslationBlocks; i++)
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync /* Fetch file version string. */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync sprintf(szFileVersionLocation, TEXT("\\StringFileInfo\\%04x%04x\\FileVersion"), lpTranslate[i].wLanguage, lpTranslate[i].wCodePage);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync ret = VerQueryValue(pVersionInfo, szFileVersionLocation, (LPVOID *)&lpszFileVersion, &cbFileVersion);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(3, "VBoxServicePageSharingRegisterModule: no file version found!\n");
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync _snprintf(pModule->szFileVersion, sizeof(pModule->szFileVersion), "%s", lpszFileVersion);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync pModule->szFileVersion[RT_ELEMENTS(pModule->szFileVersion) - 1] = 0;
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync unsigned idxRegion = 0;
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync SIZE_T ret = VirtualQuery(pBaseAddress, &MemInfo, sizeof(MemInfo));
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(3, "VBoxServicePageSharingRegisterModule: VirtualQueryEx failed with %d\n", GetLastError());
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync /* Skip the first region as it only contains the image file header. */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync /* Touch all pages. */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync while (pRegion < (char *)MemInfo.BaseAddress + MemInfo.RegionSize)
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync /* Try to trick the optimizer to leave the page touching code in place. */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync aRegions[idxRegion].GCRegionAddr = (RTGCPTR32)MemInfo.BaseAddress;
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync aRegions[idxRegion].GCRegionAddr = (RTGCPTR64)MemInfo.BaseAddress;
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync break; /* ignore */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync pBaseAddress = (BYTE *)MemInfo.BaseAddress + MemInfo.RegionSize;
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync break; /* out of room */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync /* We can't probe kernel memory ranges, so pretend it's one big region. */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync aRegions[idxRegion].GCRegionAddr = (RTGCPTR32)pBaseAddress;
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync aRegions[idxRegion].GCRegionAddr = (RTGCPTR64)pBaseAddress;
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(3, "VBoxServicePageSharingRegisterModule: VbglR3RegisterSharedModule %s %s base=%p size=%x cregions=%d\n", pModule->Info.szModule, pModule->szFileVersion, pModule->Info.modBaseAddr, pModule->Info.modBaseSize, idxRegion);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync int rc = VbglR3RegisterSharedModule(pModule->Info.szModule, pModule->szFileVersion, (uintptr_t)pModule->Info.modBaseAddr,
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(3, "VBoxServicePageSharingRegisterModule: VbglR3RegisterSharedModule failed with %Rrc\n", rc);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * Inspect all loaded modules for the specified process
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * @param dwProcessId Process id
359f2915f947abde1bba4358eada89941ee87cccvboxsyncvoid VBoxServicePageSharingInspectModules(DWORD dwProcessId, PAVLPVNODECORE *ppNewTree)
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync /* Get a list of all the modules in this process. */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync FALSE /* no child process handle inheritance */, dwProcessId);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(3, "VBoxServicePageSharingInspectModules: OpenProcess %x failed with %d\n", dwProcessId, GetLastError());
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, dwProcessId);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(3, "VBoxServicePageSharingInspectModules: CreateToolhelp32Snapshot failed with %d\n", GetLastError());
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(3, "VBoxServicePageSharingInspectModules\n");
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync /** @todo when changing this make sure VBoxService.exe is excluded! */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync continue; /* ignore executables for now. */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync /* Found it before? */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync PAVLPVNODECORE pRec = RTAvlPVGet(ppNewTree, ModuleInfo.modBaseAddr);
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync pRec = RTAvlPVRemove(&g_pKnownModuleTree, ModuleInfo.modBaseAddr);
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync /* New module; register it. */
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync PKNOWN_MODULE pModule = (PKNOWN_MODULE)RTMemAllocZ(sizeof(*pModule));
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync pModule->hModule = LoadLibraryEx(ModuleInfo.szExePath, 0, DONT_RESOLVE_DLL_REFERENCES);
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync VBoxServicePageSharingRegisterModule(pModule, true /* validate pages */);
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync VBoxServiceVerbose(3, "\n\n MODULE NAME: %s", ModuleInfo.szModule );
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync VBoxServiceVerbose(3, "\n executable = %s", ModuleInfo.szExePath );
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync VBoxServiceVerbose(3, "\n process ID = 0x%08X", ModuleInfo.th32ProcessID );
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync VBoxServiceVerbose(3, "\n base address = 0x%08X", (DWORD) ModuleInfo.modBaseAddr );
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync VBoxServiceVerbose(3, "\n base size = %d", ModuleInfo.modBaseSize );
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * Inspect all running processes for executables and dlls that might be worth sharing
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync * with other VMs.
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(3, "VBoxServicePageSharingInspectGuest\n");
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync VBoxServiceVerbose(3, "VBoxServicePageSharingInspectGuest: CreateToolhelp32Snapshot failed with %d\n", GetLastError());
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync /* Check loaded modules for all running processes. */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync /* Skip our own process. */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServicePageSharingInspectModules(ProcessInfo.th32ProcessID, &pNewTree);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync /* Check all loaded kernel modules. */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync NTSTATUS ret = g_pfnZwQuerySystemInformation(SystemModuleInformation, (PVOID)&cbBuffer, 0, &cbBuffer);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(1, "ZwQuerySystemInformation returned length 0\n");
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync ret = g_pfnZwQuerySystemInformation(SystemModuleInformation, pBuffer, cbBuffer, &cbBuffer);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(1, "ZwQuerySystemInformation returned %x (1)\n", ret);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync for (unsigned i = 0; i < pSystemModules->NumberOfModules; i++)
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(4, "\n\n KERNEL MODULE NAME: %s", pSystemModules->Modules[i].FullPathName[pSystemModules->Modules[i].OffsetToFileName] );
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(4, "\n executable = %s", pSystemModules->Modules[i].FullPathName );
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(4, "\n flags = 0x%08X\n", pSystemModules->Modules[i].Flags);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync /* User-mode modules seem to have no flags set; skip them as we detected them above. */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync /* Found it before? */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync PAVLPVNODECORE pRec = RTAvlPVGet(&pNewTree, pSystemModules->Modules[i].ImageBase);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync pRec = RTAvlPVRemove(&g_pKnownModuleTree, pSystemModules->Modules[i].ImageBase);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync /* New module; register it. */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync PKNOWN_MODULE pModule = (PKNOWN_MODULE)RTMemAllocZ(sizeof(*pModule));
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync strcpy(pModule->Info.szModule, &pSystemModules->Modules[i].FullPathName[pSystemModules->Modules[i].OffsetToFileName]);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync GetSystemDirectoryA(szFullFilePath, sizeof(szFullFilePath));
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync /* skip \Systemroot\system32 */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync char *lpPath = strchr(&pSystemModules->Modules[i].FullPathName[1], '\\');
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync /* Seen just file names in XP; try to locate the file in the system32 and system32\drivers directories. */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync strcat(szFullFilePath, pSystemModules->Modules[i].FullPathName);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(3, "Unexpected kernel module name try %s\n", szFullFilePath);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync GetSystemDirectoryA(szFullFilePath, sizeof(szFullFilePath));
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync strcat(szFullFilePath, pSystemModules->Modules[i].FullPathName);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(3, "Unexpected kernel module name try %s\n", szFullFilePath);
359f2915f947abde1bba4358eada89941ee87cccvboxsync VBoxServiceVerbose(1, "Unexpected kernel module name %s\n", pSystemModules->Modules[i].FullPathName);
359f2915f947abde1bba4358eada89941ee87cccvboxsync VBoxServiceVerbose(1, "Unexpected kernel module name %s (2)\n", pSystemModules->Modules[i].FullPathName);
359f2915f947abde1bba4358eada89941ee87cccvboxsync pModule->Info.modBaseAddr = (BYTE *)pSystemModules->Modules[i].ImageBase;
359f2915f947abde1bba4358eada89941ee87cccvboxsync pModule->Info.modBaseSize = pSystemModules->Modules[i].ImageSize;
359f2915f947abde1bba4358eada89941ee87cccvboxsync pModule->Core.Key = pSystemModules->Modules[i].ImageBase;
359f2915f947abde1bba4358eada89941ee87cccvboxsync VBoxServicePageSharingRegisterModule(pModule, false /* don't check memory pages */);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(3, "\n\n KERNEL MODULE NAME: %s", pModule->Info.szModule );
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(3, "\n executable = %s", pModule->Info.szExePath );
359f2915f947abde1bba4358eada89941ee87cccvboxsync VBoxServiceVerbose(3, "\n base address = 0x%08X", (DWORD) pModule->Info.modBaseAddr );
359f2915f947abde1bba4358eada89941ee87cccvboxsync VBoxServiceVerbose(3, "\n flags = 0x%08X", pSystemModules->Modules[i].Flags);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(3, "\n base size = %d", pModule->Info.modBaseSize );
359f2915f947abde1bba4358eada89941ee87cccvboxsync /* Delete leftover modules in the old tree. */
359f2915f947abde1bba4358eada89941ee87cccvboxsync RTAvlPVDestroy(&g_pKnownModuleTree, VBoxServicePageSharingEmptyTreeCallback, NULL);
359f2915f947abde1bba4358eada89941ee87cccvboxsync /* Check all registered modules. */
359f2915f947abde1bba4358eada89941ee87cccvboxsync /* Activate new module tree. */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * RTAvlPVDestroy callback.
359f2915f947abde1bba4358eada89941ee87cccvboxsyncstatic DECLCALLBACK(int) VBoxServicePageSharingEmptyTreeCallback(PAVLPVNODECORE pNode, void *pvUser)
359f2915f947abde1bba4358eada89941ee87cccvboxsync VBoxServiceVerbose(3, "VBoxServicePageSharingEmptyTreeCallback %s %s\n", pModule->Info.szModule, pModule->szFileVersion);
359f2915f947abde1bba4358eada89941ee87cccvboxsync /* Dereference module in the hypervisor. */
359f2915f947abde1bba4358eada89941ee87cccvboxsync int rc = VbglR3UnregisterSharedModule(pModule->Info.szModule, pModule->szFileVersion,
359f2915f947abde1bba4358eada89941ee87cccvboxsync (uintptr_t)pModule->Info.modBaseAddr, pModule->Info.modBaseSize);
359f2915f947abde1bba4358eada89941ee87cccvboxsync /* not implemented */
359f2915f947abde1bba4358eada89941ee87cccvboxsync /* @todo other platforms */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync/** @copydoc VBOXSERVICE::pfnPreInit */
359f2915f947abde1bba4358eada89941ee87cccvboxsyncstatic DECLCALLBACK(int) VBoxServicePageSharingPreInit(void)
359f2915f947abde1bba4358eada89941ee87cccvboxsync/** @copydoc VBOXSERVICE::pfnOption */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsyncstatic DECLCALLBACK(int) VBoxServicePageSharingOption(const char **ppszShort, int argc, char **argv, int *pi)
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync/** @copydoc VBOXSERVICE::pfnInit */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsyncstatic DECLCALLBACK(int) VBoxServicePageSharingInit(void)
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(3, "VBoxServicePageSharingInit\n");
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync int rc = RTSemEventMultiCreate(&g_PageSharingEvent);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync g_pfnZwQuerySystemInformation = (PFNZWQUERYSYSTEMINFORMATION)RTLdrGetSystemSymbol("ntdll.dll", "ZwQuerySystemInformation");
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(0, "PageSharing: Page sharing support is not available by the host\n");
359f2915f947abde1bba4358eada89941ee87cccvboxsync VBoxServiceError("VBoxServicePageSharingInit: Failed with rc=%Rrc\n", rc);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync/** @copydoc VBOXSERVICE::pfnWorker */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsyncDECLCALLBACK(int) VBoxServicePageSharingWorker(bool volatile *pfShutdown)
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * Tell the control thread that it can continue
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * spawning services.
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * Now enter the loop retrieving runtime data continuously.
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(3, "VBoxServicePageSharingWorker: enabled=%d\n", fEnabled);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * Block for a minute.
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * The event semaphore takes care of ignoring interruptions and it
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * allows us to implement service wakeup later.
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync int rc = RTSemEventMultiWait(g_PageSharingEvent, 60000);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceError("VBoxServicePageSharingWorker: RTSemEventMultiWait failed; rc=%Rrc\n", rc);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync bool fUnregister = false;
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(3, "VBoxServicePageSharingWorker: VM was restored!!\n");
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync /* The VM was restored, so reregister all modules the next time. */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync RTAvlPVDestroy(&g_pKnownModuleTree, VBoxServicePageSharingEmptyTreeCallback, &fUnregister);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(3, "VBoxServicePageSharingWorker: finished thread\n");
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync * This gets control when VBoxService is launched with -pagefusionfork by
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync * VBoxServicePageSharingWorkerProcess().
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync * @returns RTEXITCODE_SUCCESS.
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync * @remarks It won't normally return since the parent drops the shutdown hint
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * via RTProcTerminate().
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync VBoxServiceVerbose(3, "VBoxServicePageSharingInitFork\n");
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync bool fShutdown = false;
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync/** @copydoc VBOXSERVICE::pfnWorker */
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsyncDECLCALLBACK(int) VBoxServicePageSharingWorkerProcess(bool volatile *pfShutdown)
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * Tell the control thread that it can continue
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync * spawning services.
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * Now enter the loop retrieving runtime data continuously.
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync VBoxServiceVerbose(3, "VBoxServicePageSharingWorkerProcess: enabled=%d\n", fEnabled);
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * Start a 2nd VBoxService process to deal with page fusion as we do
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync * not wish to dummy load dlls into this process. (First load with
0a7c9cc36ee176228eab4150144ad2561b0c4647vboxsync * DONT_RESOLVE_DLL_REFERENCES, 2nd normal -> dll init routines not called!)
359f2915f947abde1bba4358eada89941ee87cccvboxsync char *pszExeName = RTProcGetExecutablePath(szExeName, sizeof(szExeName));
359f2915f947abde1bba4358eada89941ee87cccvboxsync rc = RTProcCreate(pszExeName, papszArgs, RTENV_DEFAULT, 0 /* normal child */, &hProcess);
359f2915f947abde1bba4358eada89941ee87cccvboxsync VBoxServiceError("VBoxServicePageSharingWorkerProcess: RTProcCreate %s failed; rc=%Rrc\n", pszExeName, rc);
359f2915f947abde1bba4358eada89941ee87cccvboxsync * Block for a minute.
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync * The event semaphore takes care of ignoring interruptions and it
359f2915f947abde1bba4358eada89941ee87cccvboxsync * allows us to implement service wakeup later.
2b73ea648457a8fb1ec027d1eeea63f879dad507vboxsync rc = RTSemEventMultiWait(g_PageSharingEvent, 60000);
359f2915f947abde1bba4358eada89941ee87cccvboxsync VBoxServiceError("VBoxServicePageSharingWorkerProcess: RTSemEventMultiWait failed; rc=%Rrc\n", rc);
NULL,
NULL,
#ifdef RT_OS_WINDOWS