You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
455 lines
17 KiB
455 lines
17 KiB
/***
|
|
*dllcrt0.c - C runtime initialization routine for a DLL with linked-in C R-T
|
|
*
|
|
* Copyright (c) 1989-2001, Microsoft Corporation. All rights reserved.
|
|
*
|
|
*Purpose:
|
|
* This the startup routine for a DLL which is linked with its own
|
|
* C run-time code. It is similar to the routine _mainCRTStartup()
|
|
* in the file CRT0.C, except that there is no main() in a DLL.
|
|
*
|
|
*Revision History:
|
|
* 05-04-92 SKS Based on CRT0.C (start-up code for EXE's)
|
|
* 08-26-92 SKS Add _osver, _winver, _winmajor, _winminor
|
|
* 09-16-92 SKS This module used to be enabled only in LIBCMT.LIB,
|
|
* but it is now enabled for LIBC.LIB as well!
|
|
* 09-29-92 SKS _CRT_INIT needs to be WINAPI, not cdecl
|
|
* 10-16-92 SKS Call _heap_init before _mtinit (fix copied from CRT0.C)
|
|
* 10-24-92 SKS Call to _mtdeletelocks() must be under #ifdef MTHREAD!
|
|
* 03-20-93 SKS Remove obsolete variables _osmode, _cpumode, etc.
|
|
* 04-06-93 SKS Replace _CRTAPI* with __cdecl
|
|
* 04-14-93 SKS _DllMainCRTStartup replaces _CRT_INIT. Also, call
|
|
* _mtterm instead of _mtdeletelocks on PROCESS_DETACH
|
|
* to do all multi-thread cleanup (e.g. free up TLS index)
|
|
* 04-19-93 SKS Remove obsolete variable _atopsp
|
|
* 04-20-93 SKS Call _cexit on DLL detach
|
|
* 04-20-93 SKS Restore _CRT_INIT, must co-exist with DllMainCRTStartup
|
|
* 04-26-93 SKS _mtinit now returns 0 or 1, no longer calls _amsg_exit
|
|
* 04-27-93 GJF Removed support for _RT_STACK, _RT_INTDIV,
|
|
* _RT_INVALDISP and _RT_NONCONT.
|
|
* 05-06-93 SKS Add call to _heap_term to free up all allocated memory
|
|
* *and* address space. This must be the last thing done.
|
|
* 06-08-93 GJF Added __proc_attached flag.
|
|
* 06-08-93 SKS Clean up failure handling in _CRT_INIT
|
|
* 11-05-93 CFW Undefine GetEnviromentStrings.
|
|
* 11-09-93 GJF Added call to __initmbctable (must happen before args
|
|
* and env strings are processed).
|
|
* 11-09-93 GJF Added (restored) support for NT SDK builds. Also,
|
|
* replaced MTHREAD with _MT.
|
|
* 11-20-93 CFW Wide char enable.
|
|
* 11-23-93 CFW GetEnviromentStrings undef moved to internal.h.
|
|
* 11-29-93 CFW Wide environment.
|
|
* 12-06-93 CFW Wide char enable.
|
|
* 12-13-93 SKS Free up per-thread CRT data on DLL_THREAD_DETACH
|
|
* using a call to _freeptd() in _CRT_INIT()
|
|
* 03-30-93 CFW Use __crtXXX calls for Unicode model.
|
|
* 04-08-93 CFW Move __crtXXX calls past initialization.
|
|
* 06-08-94 SKS Add functn pointer _pRawDllMain, called around DllMain.
|
|
* 09-06-94 CFW Remove _MBCS_OS switch.
|
|
* 09-06-94 GJF Added __error_mode and __app_type.
|
|
* 09-15-94 SKS Move #ifndef directives to after file header comment
|
|
* 12-27-94 CFW Remove unused _wDll support.
|
|
* 01-16-95 CFW Set default debug output for console.
|
|
* 02-22-95 JCF Spliced _WIN32 & Mac versions.
|
|
* 03-10-95 JCF Return the user error from DllInit instead of noErr.
|
|
* 03-28-95 BWT Fail if unable to retrieve cmdline or envptr (fixes
|
|
* stress bug).
|
|
* 04-06-95 CFW Set default debug output for Mac, dump leaks for user
|
|
* DLL.
|
|
* 04-06-95 CFW Use __crtGetEnvironmentStringsA.
|
|
* 04-12-95 CFW __crtGetEnvironmentStringsA must be after mtinit().
|
|
* 04-14-95 CFW env, arg test must also be.
|
|
* 04-26-95 CFW Change default debug output for Mac to debugger.
|
|
* 05-23-95 CFW Dump memory leaks before mtterm().
|
|
* 06-27-95 CFW Always set __app_type.
|
|
* 06-28-95 GJF Added call to _ioterm() to clean up lowio at DLL
|
|
* unload time.
|
|
* 07-04-95 GJF Interface to __crtGetEnvironmentStrings and _setenvp
|
|
* changes slightly.
|
|
* 07-07-95 CFW Simplify default report mode scheme.
|
|
* 04-23-96 GJF Check for failure of heap initialization.
|
|
* 05-14-96 GJF Changed how failure during process attach is handled.
|
|
* 02-18-97 GJF Removed obsolete Win32s and PharLap TNT support. Also,
|
|
* some cosmetic changes.
|
|
* 07-24-97 GJF Minor changes to support stubbing out arg and env
|
|
* processing, and our heap manager.
|
|
* 10-02-98 GJF Use GetVersionEx instead of GetVersion and store OS ID
|
|
* in _osplatform.
|
|
* 11-13-98 KBF Moved RTC_Initialize from _cinit to after _heap_init.
|
|
* 05-11-99 KBF Wrap RTC support in #ifdef.
|
|
* 05-17-99 PML Remove all Macintosh support.
|
|
* 02-02-00 GB Added ATTACH_THREAD support for _CRT_INIT where we
|
|
* initialise per thread data so that in case where we
|
|
* are short of memory, we don't have to kill the whole
|
|
* process for inavailablity of space.
|
|
* 08-22-00 GB Fixed potentia leak of ptd in CRT_INIT
|
|
* 03-16-01 PML _alloca the OSVERSIONINFO so /GS can work (vs7#224261)
|
|
* 03-26-01 PML Use GetVersionExA, not GetVersionEx (vs7#230286)
|
|
* 03-27-01 PML Fail DLL load instead of calling _amsg_exit (vs7#231220)
|
|
* 10-16-01 GB Added fiber support
|
|
* 02-20-02 BWT prefast fixes - don't use alloca
|
|
* 06-12-02 BWT Don't bother with io/mt/heap term if the process is shutting down.
|
|
*
|
|
*******************************************************************************/
|
|
|
|
#ifndef _POSIX_ /* not built for POSIX */
|
|
#ifndef CRTDLL /* not built for CRTDLL */
|
|
|
|
#include <cruntime.h>
|
|
#include <dos.h>
|
|
#include <internal.h>
|
|
#include <mtdll.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <rterr.h>
|
|
#include <oscalls.h>
|
|
#define _DECL_DLLMAIN /* enable prototypes for DllMain and _CRT_INIT */
|
|
#include <process.h>
|
|
#include <awint.h>
|
|
#include <tchar.h>
|
|
#include <dbgint.h>
|
|
#include <rtcapi.h>
|
|
|
|
/*
|
|
* flag set iff _CRTDLL_INIT was called with DLL_PROCESS_ATTACH
|
|
*/
|
|
static int __proc_attached = 0;
|
|
|
|
/*
|
|
* command line, environment, and a few other globals
|
|
*/
|
|
char *_acmdln; /* points to command line */
|
|
|
|
char *_aenvptr = NULL; /* points to environment block */
|
|
wchar_t *_wenvptr = NULL; /* points to wide environment block */
|
|
|
|
void (__cdecl * _aexit_rtn)(int) = _exit; /* RT message return procedure */
|
|
|
|
/*
|
|
* _error_mode and _apptype, together, determine how error messages are
|
|
* written out.
|
|
*/
|
|
int __error_mode = _OUT_TO_DEFAULT;
|
|
int __app_type = _UNKNOWN_APP;
|
|
|
|
/*
|
|
* User routine DllMain is called on all notifications
|
|
*/
|
|
extern BOOL WINAPI DllMain(
|
|
HANDLE hDllHandle,
|
|
DWORD dwReason,
|
|
LPVOID lpreserved
|
|
) ;
|
|
|
|
/* _pRawDllMain MUST be a common variable, not extern nor initialized! */
|
|
|
|
BOOL (WINAPI *_pRawDllMain)(HANDLE, DWORD, LPVOID);
|
|
|
|
/***
|
|
*BOOL WINAPI _CRT_INIT(hDllHandle, dwReason, lpreserved) -
|
|
* C Run-Time initialization for a DLL linked with a C run-time library.
|
|
*
|
|
*Purpose:
|
|
* This routine does the C run-time initialization or termination.
|
|
* For the multi-threaded run-time library, it also cleans up the
|
|
* multi-threading locks on DLL termination.
|
|
*
|
|
*Entry:
|
|
*
|
|
*Exit:
|
|
*
|
|
*NOTES:
|
|
* This routine must be the entry point for the DLL.
|
|
*
|
|
*******************************************************************************/
|
|
|
|
BOOL WINAPI _CRT_INIT(
|
|
HANDLE hDllHandle,
|
|
DWORD dwReason,
|
|
LPVOID lpreserved
|
|
)
|
|
{
|
|
/*
|
|
* Start-up code only gets executed when the process is initialized
|
|
*/
|
|
|
|
if ( dwReason == DLL_PROCESS_ATTACH )
|
|
{
|
|
/*
|
|
* Dynamically allocate the OSVERSIONINFOA buffer, so we avoid
|
|
* triggering the /GS buffer overrun detection. That can't be
|
|
* used here, since the guard cookie isn't available until we
|
|
* initialize it from here!
|
|
*/
|
|
OSVERSIONINFOA *posvi =
|
|
(OSVERSIONINFOA *)HeapAlloc(GetProcessHeap(), 0, sizeof(OSVERSIONINFOA));
|
|
if (!posvi) {
|
|
return FALSE;
|
|
}
|
|
|
|
/*
|
|
* Get the full Win32 version
|
|
*/
|
|
posvi->dwOSVersionInfoSize = sizeof(OSVERSIONINFOA);
|
|
if ( !GetVersionExA(posvi) ) {
|
|
HeapFree(GetProcessHeap(), 0, posvi);
|
|
return FALSE;
|
|
}
|
|
|
|
_osplatform = posvi->dwPlatformId;
|
|
_winmajor = posvi->dwMajorVersion;
|
|
_winminor = posvi->dwMinorVersion;
|
|
|
|
/*
|
|
* The somewhat bizarre calculations of _osver and _winver are
|
|
* required for backward compatibility (used to use GetVersion)
|
|
*/
|
|
_osver = (posvi->dwBuildNumber) & 0x07fff;
|
|
HeapFree(GetProcessHeap(), 0, posvi);
|
|
if ( _osplatform != VER_PLATFORM_WIN32_NT )
|
|
_osver |= 0x08000;
|
|
_winver = (_winmajor << 8) + _winminor;
|
|
|
|
#ifdef _MT
|
|
if ( !_heap_init(1) ) /* initialize heap */
|
|
#else
|
|
if ( !_heap_init(0) ) /* initialize heap */
|
|
#endif
|
|
return FALSE; /* fail to load DLL */
|
|
|
|
#ifdef _MT
|
|
if(!_mtinit()) /* initialize multi-thread */
|
|
{
|
|
_heap_term(); /* heap is now invalid! */
|
|
return FALSE; /* fail to load DLL */
|
|
}
|
|
#endif /* _MT */
|
|
|
|
/*
|
|
* Initialize the Runtime Checks stuff
|
|
*/
|
|
#ifdef _RTC
|
|
_RTC_Initialize();
|
|
#endif
|
|
_acmdln = (char *)GetCommandLineA();
|
|
_aenvptr = (char *)__crtGetEnvironmentStringsA();
|
|
|
|
if (_ioinit() < 0) { /* initialize lowio */
|
|
#ifdef _MT
|
|
_mtterm(); /* free TLS index, call _mtdeletelocks() */
|
|
#endif /* _MT */
|
|
_heap_term(); /* heap is now invalid! */
|
|
return FALSE; /* fail to load DLL */
|
|
}
|
|
|
|
if (_setargv() < 0 || /* get cmd line info */
|
|
_setenvp() < 0 || /* get environ info */
|
|
_cinit() != 0) /* do C data initialize */
|
|
{
|
|
_ioterm(); /* shut down lowio */
|
|
#ifdef _MT
|
|
_mtterm(); /* free TLS index, call _mtdeletelocks() */
|
|
#endif /* _MT */
|
|
_heap_term(); /* heap is now invalid! */
|
|
return FALSE; /* fail to load DLL */
|
|
}
|
|
|
|
/*
|
|
* increment flag to indicate process attach notification
|
|
* has been received
|
|
*/
|
|
__proc_attached++;
|
|
}
|
|
|
|
else if ( dwReason == DLL_PROCESS_DETACH )
|
|
{
|
|
if ( __proc_attached > 0 )
|
|
{
|
|
__proc_attached--;
|
|
|
|
/*
|
|
* Any basic clean-up code that goes here must be duplicated
|
|
* below in _DllMainCRTStartup for the case where the user's
|
|
* DllMain() routine fails on a Process Attach notification.
|
|
* This does not include calling user C++ destructors, etc.
|
|
*/
|
|
|
|
if ( _C_Termination_Done == FALSE )
|
|
_cexit();
|
|
|
|
#ifdef _DEBUG
|
|
/* Dump all memory leaks */
|
|
if (_CrtSetDbgFlag(_CRTDBG_REPORT_FLAG) & _CRTDBG_LEAK_CHECK_DF)
|
|
_CrtDumpMemoryLeaks();
|
|
#endif
|
|
/*
|
|
* What remains is to clean up the system resources we have
|
|
* used (handles, critical sections, memory,...,etc.). This
|
|
* needs to be done if the whole process is NOT terminating.
|
|
*/
|
|
|
|
if ( lpreserved == NULL )
|
|
{
|
|
/*
|
|
* The process is NOT terminating so we must clean up...
|
|
*/
|
|
/* Shut down lowio */
|
|
_ioterm();
|
|
|
|
#ifdef _MT
|
|
_mtterm();
|
|
#endif
|
|
|
|
/* This should be the last thing the C run-time does */
|
|
_heap_term(); /* heap is now invalid! */
|
|
}
|
|
}
|
|
else
|
|
/* no prior process attach, just return */
|
|
return FALSE;
|
|
}
|
|
#ifdef _MT
|
|
else if ( dwReason == DLL_THREAD_ATTACH )
|
|
{
|
|
_ptiddata ptd;
|
|
if ( ((ptd = _calloc_crt(1, sizeof(struct _tiddata))) != NULL))
|
|
{
|
|
if (FLS_SETVALUE(__tlsindex, (LPVOID)ptd) ) {
|
|
/*
|
|
* Initialize of per-thread data
|
|
*/
|
|
_initptd(ptd);
|
|
|
|
ptd->_tid = GetCurrentThreadId();
|
|
ptd->_thandle = (uintptr_t)(-1);
|
|
} else
|
|
{
|
|
_free_crt(ptd);
|
|
return FALSE;
|
|
}
|
|
} else
|
|
{
|
|
return FALSE;
|
|
}
|
|
}
|
|
else if ( dwReason == DLL_THREAD_DETACH )
|
|
{
|
|
_freeptd(NULL); /* free up per-thread CRT data */
|
|
}
|
|
#endif
|
|
|
|
return TRUE ;
|
|
}
|
|
|
|
/***
|
|
*BOOL WINAPI _DllMainCRTStartup(hDllHandle, dwReason, lpreserved) -
|
|
* C Run-Time initialization for a DLL linked with a C run-time library.
|
|
*
|
|
*Purpose:
|
|
* This routine does the C run-time initialization or termination
|
|
* and then calls the user code notification handler "DllMain".
|
|
* For the multi-threaded run-time library, it also cleans up the
|
|
* multi-threading locks on DLL termination.
|
|
*
|
|
*Entry:
|
|
*
|
|
*Exit:
|
|
*
|
|
*NOTES:
|
|
* This routine is the preferred entry point. _CRT_INIT may also be
|
|
* used, or the user may supply his/her own entry and call _CRT_INIT
|
|
* from within it, but this is not the preferred method.
|
|
*
|
|
*******************************************************************************/
|
|
|
|
BOOL WINAPI _DllMainCRTStartup(
|
|
HANDLE hDllHandle,
|
|
DWORD dwReason,
|
|
LPVOID lpreserved
|
|
)
|
|
{
|
|
BOOL retcode = TRUE;
|
|
|
|
/*
|
|
* If this is a process detach notification, check that there has
|
|
* has been a prior process attach notification.
|
|
*/
|
|
if ( (dwReason == DLL_PROCESS_DETACH) && (__proc_attached == 0) )
|
|
/*
|
|
* no prior process attach notification. just return
|
|
* without doing anything.
|
|
*/
|
|
return FALSE;
|
|
|
|
if ( dwReason == DLL_PROCESS_ATTACH || dwReason == DLL_THREAD_ATTACH )
|
|
{
|
|
if ( _pRawDllMain )
|
|
retcode = (*_pRawDllMain)(hDllHandle, dwReason, lpreserved);
|
|
|
|
if ( retcode )
|
|
retcode = _CRT_INIT(hDllHandle, dwReason, lpreserved);
|
|
|
|
if ( !retcode )
|
|
return FALSE;
|
|
}
|
|
|
|
retcode = DllMain(hDllHandle, dwReason, lpreserved);
|
|
|
|
if ( (dwReason == DLL_PROCESS_ATTACH) && !retcode )
|
|
/*
|
|
* The user's DllMain routine returned failure, the C runtime
|
|
* needs to be cleaned up. Do this by calling _CRT_INIT again,
|
|
* this time imitating DLL_PROCESS_DETACH. Note this will also
|
|
* clear the __proc_attached flag so the cleanup will not be
|
|
* repeated upon receiving the real process detach notification.
|
|
*/
|
|
_CRT_INIT(hDllHandle, DLL_PROCESS_DETACH, lpreserved);
|
|
|
|
if ( (dwReason == DLL_PROCESS_DETACH) ||
|
|
(dwReason == DLL_THREAD_DETACH) )
|
|
{
|
|
if ( _CRT_INIT(hDllHandle, dwReason, lpreserved) == FALSE )
|
|
retcode = FALSE ;
|
|
|
|
if ( retcode && _pRawDllMain )
|
|
retcode = (*_pRawDllMain)(hDllHandle, dwReason, lpreserved);
|
|
}
|
|
|
|
return retcode ;
|
|
}
|
|
|
|
|
|
/***
|
|
*_amsg_exit(rterrnum) - Fast exit fatal errors
|
|
*
|
|
*Purpose:
|
|
* Exit the program with error code of 255 and appropriate error
|
|
* message.
|
|
*
|
|
*Entry:
|
|
* int rterrnum - error message number (amsg_exit only).
|
|
*
|
|
*Exit:
|
|
* Calls exit() (for integer divide-by-0) or _exit() indirectly
|
|
* through _aexit_rtn [amsg_exit].
|
|
* For multi-thread: calls _exit() function
|
|
*
|
|
*Exceptions:
|
|
*
|
|
*******************************************************************************/
|
|
|
|
void __cdecl _amsg_exit (
|
|
int rterrnum
|
|
)
|
|
{
|
|
if ( (__error_mode == _OUT_TO_STDERR) || ((__error_mode ==
|
|
_OUT_TO_DEFAULT) && (__app_type == _CONSOLE_APP)) )
|
|
_FF_MSGBANNER(); /* write run-time error banner */
|
|
|
|
_NMSG_WRITE(rterrnum); /* write message */
|
|
_aexit_rtn(255); /* normally _exit(255) */
|
|
}
|
|
|
|
|
|
#endif /* CRTDLL */
|
|
#endif /* _POSIX_ */
|