summaryrefslogtreecommitdiffstats
path: root/sal/osl/w32/dllentry.cxx
diff options
context:
space:
mode:
Diffstat (limited to 'sal/osl/w32/dllentry.cxx')
-rw-r--r--sal/osl/w32/dllentry.cxx252
1 files changed, 252 insertions, 0 deletions
diff --git a/sal/osl/w32/dllentry.cxx b/sal/osl/w32/dllentry.cxx
new file mode 100644
index 000000000..9493e59bc
--- /dev/null
+++ b/sal/osl/w32/dllentry.cxx
@@ -0,0 +1,252 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <systools/win32/uwinapi.h>
+#include <tlhelp32.h>
+#include <rpc.h>
+#include <winsock.h>
+#ifdef _DEBUG
+#include <crtdbg.h>
+#endif
+#include <osl/diagnose.h>
+#include <sal/types.h>
+#include <float.h>
+
+#include <osl/mutex.h>
+#include <osl/thread.h>
+
+#include "file_url.hxx"
+#include "gmutex.hxx"
+#include <rtllifecycle.h>
+
+#include "thread.hxx"
+
+/*
+This is needed because DllMain is called after static constructors. A DLL's
+startup and shutdown sequence looks like this:
+
+_pRawDllMain()
+_CRT_INIT()
+DllMain()
+...
+DllMain()
+_CRT_INIT()
+_pRawDllMain()
+
+*/
+
+extern "C" {
+
+static BOOL WINAPI RawDllMain( HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved );
+BOOL (WINAPI *_pRawDllMain)(HINSTANCE, DWORD, LPVOID) = RawDllMain;
+
+}
+
+static BOOL WINAPI RawDllMain( HINSTANCE, DWORD fdwReason, LPVOID )
+{
+ switch (fdwReason)
+ {
+ case DLL_PROCESS_ATTACH:
+ {
+#ifdef _DEBUG
+ WCHAR buf[64];
+ DWORD const res = GetEnvironmentVariableW(L"SAL_NO_ASSERT_DIALOGS", buf, SAL_N_ELEMENTS(buf));
+ if (res && res < SAL_N_ELEMENTS(buf))
+ {
+ // disable the dialog on abort()
+ _CrtSetReportFile(_CRT_ERROR, _CRTDBG_FILE_STDERR);
+ _CrtSetReportMode(_CRT_ERROR, (_CRTDBG_MODE_DEBUG|_CRTDBG_MODE_FILE));
+ // not sure which assertions this affects
+ _CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR);
+ _CrtSetReportMode(_CRT_ASSERT, (_CRTDBG_MODE_DEBUG|_CRTDBG_MODE_FILE));
+ // disable the dialog on assert(false)
+ _set_error_mode(_OUT_TO_STDERR);
+ }
+#endif
+
+#if OSL_DEBUG_LEVEL < 2
+ /* Suppress file error messages from system like "Floppy A: not inserted" */
+ SetErrorMode( SEM_NOOPENFILEERRORBOX | SEM_FAILCRITICALERRORS );
+#endif
+
+ /* initialize global mutex */
+ g_Mutex = osl_createMutex();
+
+ /* initialize "current directory" mutex */
+ g_CurrentDirectoryMutex = osl_createMutex();
+
+ g_dwTLSTextEncodingIndex = TlsAlloc();
+ InitializeCriticalSection( &g_ThreadKeyListCS );
+
+ //We disable floating point exceptions. This is the usual state at program startup
+ //but on Windows 98 and ME this is not always the case.
+ _control87(_MCW_EM, _MCW_EM);
+ break;
+ }
+
+ case DLL_PROCESS_DETACH:
+ WSACleanup( );
+
+ TlsFree( g_dwTLSTextEncodingIndex );
+ DeleteCriticalSection( &g_ThreadKeyListCS );
+
+ osl_destroyMutex( g_Mutex );
+
+ osl_destroyMutex( g_CurrentDirectoryMutex );
+
+ /*
+
+ On a product build memory management finalization might
+ cause a crash without assertion (assertions off) if heap is
+ corrupted. But a crash report won't help here because at
+ this point all other threads have been terminated and only
+ ntdll is on the stack. No chance to find the reason for the
+ corrupted heap if so.
+
+ So annoying the user with a crash report is completely useless.
+
+ */
+
+#ifndef DBG_UTIL
+ __try
+#endif
+ {
+ /* cleanup locale hashtable */
+ rtl_locale_fini();
+
+ /* finalize memory management */
+ rtl_cache_fini();
+ rtl_arena_fini();
+ }
+#ifndef DBG_UTIL
+ __except( EXCEPTION_EXECUTE_HANDLER )
+ {
+ }
+#endif
+ break;
+ }
+
+ return TRUE;
+}
+
+static DWORD GetParentProcessId()
+{
+ DWORD dwParentProcessId = 0;
+ HANDLE hSnapshot = CreateToolhelp32Snapshot( TH32CS_SNAPPROCESS, 0 );
+
+ if ( IsValidHandle( hSnapshot ) )
+ {
+ PROCESSENTRY32 pe;
+ bool fSuccess;
+
+ ZeroMemory( &pe, sizeof(pe) );
+ pe.dwSize = sizeof(pe);
+ fSuccess = Process32First( hSnapshot, &pe );
+
+ while( fSuccess )
+ {
+ if ( GetCurrentProcessId() == pe.th32ProcessID )
+ {
+ dwParentProcessId = pe.th32ParentProcessID;
+ break;
+ }
+
+ fSuccess = Process32Next( hSnapshot, &pe );
+ }
+
+ CloseHandle( hSnapshot );
+ }
+
+ return dwParentProcessId;
+}
+
+static DWORD WINAPI ParentMonitorThreadProc( LPVOID lpParam )
+{
+ DWORD_PTR dwParentProcessId = reinterpret_cast<DWORD_PTR>(lpParam);
+
+ HANDLE hParentProcess = OpenProcess( SYNCHRONIZE, FALSE, dwParentProcessId );
+
+ osl_setThreadName("headless ParentMonitorThread");
+
+ if ( IsValidHandle( hParentProcess ) )
+ {
+ if ( WAIT_OBJECT_0 == WaitForSingleObject( hParentProcess, INFINITE ) )
+ {
+ TerminateProcess( GetCurrentProcess(), 0 );
+ }
+ CloseHandle( hParentProcess );
+ }
+ return 0;
+}
+
+extern "C"
+BOOL WINAPI DllMain( HINSTANCE, DWORD fdwReason, LPVOID )
+{
+ switch (fdwReason)
+ {
+ case DLL_PROCESS_ATTACH:
+ {
+ WCHAR szBuffer[64];
+
+ // This code will attach the process to its parent process
+ // if the parent process had set the environment variable.
+ // The corresponding code (setting the environment variable)
+ // is desktop/win32/source/officeloader.cxx
+
+ DWORD dwResult = GetEnvironmentVariableW( L"ATTACHED_PARENT_PROCESSID", szBuffer, SAL_N_ELEMENTS(szBuffer) );
+
+ if ( dwResult && dwResult < SAL_N_ELEMENTS(szBuffer) )
+ {
+ DWORD dwThreadId = 0;
+
+ DWORD_PTR dwParentProcessId = static_cast<DWORD_PTR>(_wtol( szBuffer ));
+
+ if ( dwParentProcessId && GetParentProcessId() == dwParentProcessId )
+ {
+ // No error check, it works or it does not
+ // Thread should only be started for headless mode, see desktop/win32/source/officeloader.cxx
+ HANDLE hThread
+ = CreateThread(nullptr, 0, ParentMonitorThreadProc,
+ reinterpret_cast<LPVOID>(dwParentProcessId), 0, &dwThreadId);
+ // Note: calling CreateThread in DllMain is discouraged
+ // but this is only done in the headless mode and in
+ // that case no other threads should be running at startup
+ // when sal3.dll is loaded; also there is no
+ // synchronization with the spawned thread, so there
+ // does not appear to be a real risk of deadlock here
+ if (hThread)
+ CloseHandle(hThread);
+ }
+ }
+
+ return TRUE;
+ }
+
+ case DLL_THREAD_ATTACH:
+ break;
+
+ case DLL_THREAD_DETACH:
+ osl_callThreadKeyCallbackOnThreadDetach( );
+ break;
+ }
+
+ return TRUE;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */