summaryrefslogtreecommitdiff
path: root/sal/osl/w32/dllentry.c
blob: b6a21d6c2724281e60dfc2ab536610aacac69d42 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/

#ifdef _MSC_VER
#pragma warning(push,1) /* disable warnings within system headers */
#endif
#include <windows.h>
#ifdef _MSC_VER
#pragma warning(pop)
#endif
#include <tlhelp32.h>
#include <systools/win32/uwinapi.h>
#include <winsock.h>
#include <osl/diagnose.h>
#include <sal/types.h>
#include <float.h>

#include <osl/diagnose.h>
#include <osl/mutex.h>
#include <sal/types.h>

//------------------------------------------------------------------------------
// externals
//------------------------------------------------------------------------------

extern DWORD            g_dwTLSTextEncodingIndex;
extern void SAL_CALL    _osl_callThreadKeyCallbackOnThreadDetach(void);
extern CRITICAL_SECTION g_ThreadKeyListCS;
extern oslMutex         g_Mutex;
extern oslMutex         g_CurrentDirectoryMutex;

extern void rtl_locale_fini (void);
extern void rtl_memory_fini (void);
extern void rtl_cache_fini (void);
extern void rtl_arena_fini (void);

#ifdef __MINGW32__

typedef void (*func_ptr) (void);
extern func_ptr __CTOR_LIST__[];
extern func_ptr __DTOR_LIST__[];

static void do_startup(void);
static void do_cleanup(void);

#else

/*
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()

*/

static BOOL WINAPI _RawDllMain( HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved );
extern BOOL (WINAPI *_pRawDllMain)(HANDLE, DWORD, LPVOID) = _RawDllMain;

#endif

//------------------------------------------------------------------------------
// globales
//------------------------------------------------------------------------------

DWORD         g_dwPlatformId = VER_PLATFORM_WIN32_WINDOWS; // remember plattform

//------------------------------------------------------------------------------
// DllMain
//------------------------------------------------------------------------------
#ifdef _M_IX86
int osl_isSingleCPU = 0;
#endif

#ifdef __MINGW32__

void
__do_global_dtors (void)
{
  static func_ptr *p = __DTOR_LIST__ + 1;

  /*
   * Call each destructor in the destructor list until a null pointer
   * is encountered.
   */
  while (*p)
    {
      (*(p)) ();
      p++;
    }
}

void
__do_global_ctors (void)
{
  unsigned long nptrs = (unsigned long) __CTOR_LIST__[0];
  unsigned i;

  /*
   * If the first entry in the constructor list is -1 then the list
   * is terminated with a null entry. Otherwise the first entry was
   * the number of pointers in the list.
   */
  if (nptrs == -1)
    {
      for (nptrs = 0; __CTOR_LIST__[nptrs + 1] != 0; nptrs++)
    ;
    }

  /*
   * Go through the list backwards calling constructors.
   */
  for (i = nptrs; i >= 1; i--)
    {
      __CTOR_LIST__[i] ();
    }

  /*
   * Register the destructors for processing on exit.
   */
  atexit (__do_global_dtors);
}

static int initialized = 0;

void
__main (void)
{
  if (!initialized)
    {
      initialized = 1;
      do_startup();
      __do_global_ctors ();
    }
}

static void do_startup( void )
{
#else
static BOOL WINAPI _RawDllMain( HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved )
{
    (void)hinstDLL; /* avoid warnings */
    (void)lpvReserved; /* avoid warnings */

    switch (fdwReason)
    {
        case DLL_PROCESS_ATTACH:
            {
#endif
                OSVERSIONINFO aInfo;

#ifdef _M_IX86
                SYSTEM_INFO SystemInfo;

                GetSystemInfo(&SystemInfo);

                /* Determine if we are on a multiprocessor/multicore/HT x86/x64 system
                 *
                 * The lock prefix for atomic operations in osl_[inc|de]crementInterlockedCount()
                 * comes with a cost and is especially expensive on pre HT x86 single processor
                 * systems, where it isn't needed at all.
                 */
                if ( SystemInfo.dwNumberOfProcessors == 1 ) {
                    osl_isSingleCPU = 1;
                }
#endif
                /* Suppress file error messages from system like "Floppy A: not inserted" */
                SetErrorMode( SEM_NOOPENFILEERRORBOX | SEM_FAILCRITICALERRORS );

                /* initialize global mutex */
                g_Mutex = osl_createMutex();

                /* initialize "current directory" mutex */
                g_CurrentDirectoryMutex = osl_createMutex();


                /* initialize Win9x unicode functions */
                aInfo.dwOSVersionInfoSize = sizeof( OSVERSIONINFO );

                if ( GetVersionEx(&aInfo) )
                    g_dwPlatformId = aInfo.dwPlatformId;

                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);
#ifdef __MINGW32__
        atexit(do_cleanup);
}

void do_cleanup( void )
{
#else
                break;
            }

        case DLL_PROCESS_DETACH:
#endif

            WSACleanup( );

            TlsFree( g_dwTLSTextEncodingIndex );
            DeleteCriticalSection( &g_ThreadKeyListCS );

            osl_destroyMutex( g_Mutex );

            osl_destroyMutex( g_CurrentDirectoryMutex );

#ifndef __MINGW32__

            /*

            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 completly useless.

            */

#ifndef DBG_UTIL
            __try
#endif
            {
                /* cleanup locale hashtable */
                rtl_locale_fini();

                /* finalize memory management */
                rtl_memory_fini();
                rtl_cache_fini();
                rtl_arena_fini();
            }
#ifndef DBG_UTIL
            __except( EXCEPTION_EXECUTE_HANDLER )
            {
            }
#endif
            break;
    }

    return TRUE;
#endif
}

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   dwParentProcessId = (DWORD)lpParam;

    HANDLE  hParentProcess = OpenProcess( SYNCHRONIZE, FALSE, dwParentProcessId );
    if ( IsValidHandle( hParentProcess ) )
    {
        if ( WAIT_OBJECT_0 == WaitForSingleObject( hParentProcess, INFINITE ) )
        {
            TerminateProcess( GetCurrentProcess(), 0 );
        }
        CloseHandle( hParentProcess );
    }
    return 0;
}

BOOL WINAPI DllMain( HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved )
{
    (void)hinstDLL; /* avoid warning */
    (void)lpvReserved; /* avoid warning */
    switch (fdwReason)
    {
        case DLL_PROCESS_ATTACH:
        {
            TCHAR   szBuffer[64];

            // This code will attach the process to it's parent process
            // if the parent process had set the environment variable.
            // The corresponding code (setting the environment variable)
            // is is desktop/win32/source/officeloader.cxx


            DWORD   dwResult = GetEnvironmentVariable( "ATTACHED_PARENT_PROCESSID", szBuffer, sizeof(szBuffer) );

            if ( dwResult && dwResult < sizeof(szBuffer) )
            {
                DWORD   dwThreadId = 0;

                DWORD   dwParentProcessId = (DWORD)atol( 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
                    CreateThread( NULL, 0, ParentMonitorThreadProc, (LPVOID)dwParentProcessId, 0, &dwThreadId ); //
                }
            }

            return TRUE;
        }

        case DLL_THREAD_ATTACH:
            break;

        case DLL_THREAD_DETACH:
            _osl_callThreadKeyCallbackOnThreadDetach( );
            break;
    }

    return TRUE;
}