有谁知道_CRTMainStartup源码是什么样子的？

[iwillalwaysloveyou]

除了内存申请函数之外，_CRTMainStartup还可能调用哪些windows的API？

[taodm]

不如说说为啥想问这个问题吧。

[iwillalwaysloveyou]

除了初始化全局或静态对象之外，还干什么？

[mLee79]

$(VC)/CRT/SRC/CRT0.C 这东西自己找三 ...

[iwillalwaysloveyou]

我想把一个vc6编译的程序直接用被改造的bochs虚拟机执行，不使用操作系统

[sirguan]

int wmainCRTStartup(
#else /* WPRFLAG */
int mainCRTStartup(
#endif /* WPRFLAG */

#endif /* _WINMAIN_ */

void
)

{
int initret;
int mainret;
OSVERSIONINFOA *posvi;
int managedapp;
#ifdef _WINMAIN_
_TUCHAR *lpszCommandLine;
STARTUPINFO StartupInfo;
#endif /* _WINMAIN_ */
/*
* 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!
*/
posvi = (OSVERSIONINFOA *)_alloca(sizeof(OSVERSIONINFOA));

/*
* Get the full Win32 version
*/
posvi->dwOSVersionInfoSize = sizeof(OSVERSIONINFOA);
(void)GetVersionExA(posvi);

_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;
if ( _osplatform != VER_PLATFORM_WIN32_NT )
_osver |= 0x08000;
_winver = (_winmajor << 8) + _winminor;

/*
* Determine if this is a managed application
*/
managedapp = check_managed_app();

#ifdef _MT
if ( !_heap_init(1) ) /* initialize heap */
#else /* _MT */
if ( !_heap_init(0) ) /* initialize heap */
#endif /* _MT */
fast_error_exit(_RT_HEAPINIT); /* write message and die */

#ifdef _MT
if( !_mtinit() ) /* initialize multi-thread */
fast_error_exit(_RT_THREAD); /* write message and die */
#endif /* _MT */

/*
* Initialize the Runtime Checks stuff
*/
#ifdef _RTC
_RTC_Initialize();
#endif /* _RTC */
/*
* Guard the remainder of the initialization code and the call
* to user's main, or WinMain, function in a __try/__except
* statement.
*/

__try {

if ( _ioinit() < 0 ) /* initialize lowio */
_amsg_exit(_RT_LOWIOINIT);

#ifdef WPRFLAG
/* get wide cmd line info */
_wcmdln = (wchar_t *)__crtGetCommandLineW();

/* get wide environ info */
_wenvptr = (wchar_t *)__crtGetEnvironmentStringsW();

if ( _wsetargv() < 0 )
_amsg_exit(_RT_SPACEARG);
if ( _wsetenvp() < 0 )
_amsg_exit(_RT_SPACEENV);
#else /* WPRFLAG */
/* get cmd line info */
_acmdln = (char *)GetCommandLineA();

/* get environ info */
_aenvptr = (char *)__crtGetEnvironmentStringsA();

if ( _setargv() < 0 )
_amsg_exit(_RT_SPACEARG);
if ( _setenvp() < 0 )
_amsg_exit(_RT_SPACEENV);
#endif /* WPRFLAG */

initret = _cinit(TRUE); /* do C data initialize */
if (initret != 0)
_amsg_exit(initret);

#ifdef _WINMAIN_

StartupInfo.dwFlags = 0;
GetStartupInfo( &StartupInfo );

#ifdef WPRFLAG
lpszCommandLine = _wwincmdln();
mainret = wWinMain(
#else /* WPRFLAG */
lpszCommandLine = _wincmdln();
mainret = WinMain(
#endif /* WPRFLAG */
GetModuleHandleA(NULL),
NULL,
lpszCommandLine,
StartupInfo.dwFlags & STARTF_USESHOWWINDOW
? StartupInfo.wShowWindow
: SW_SHOWDEFAULT
);
#else /* _WINMAIN_ */

#ifdef WPRFLAG
__winitenv = _wenviron;
mainret = wmain(__argc, __wargv, _wenviron);
#else /* WPRFLAG */
__initenv = _environ;
mainret = main(__argc, __argv, _environ);
#endif /* WPRFLAG */

#endif /* _WINMAIN_ */

if ( !managedapp )
exit(mainret);

_cexit();

}
__except ( _XcptFilter(GetExceptionCode(), GetExceptionInformation()) )
{
/*
* Should never reach here
*/

mainret = GetExceptionCode();

if ( !managedapp )
_exit(mainret);

_c_exit();

} /* end of try - except */

return mainret;
}
vc里直接跟踪一下就出来了

[iwillalwaysloveyou]

在vc6.0安装目录下搜CRT0.C，找不到

[mLee79]

你首先要确认下有没有安装源码, 找不大才怪 ...

[珍惜生命远离CPP]

VC如果选择安装源码的话是可以在源码目录找到的