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__tmainCRTStartup的异常会发送_exit(0)消息？

xiaomeili 2023-3-13 192

同学们，我遇到一个异常0x800003，通过windbg 调试看 exit 的参数是0 ，找到源码后，看 __tmainCRTStartup 抛异常时，exit（0）.mainret不可能是 0 吧？？？？？？
同学们这个怎么理解呢，

#ifdef WPRFLAG
__winitenv = envp;
mainret = wmain(argc, argv, envp);

#else / WPRFLAG /
__initenv = envp;
mainret = main(argc, argv, envp);

#endif / WPRFLAG /

#endif / WINMAIN /

    /*
     * Note that if the exe is managed app, we don't really need to
     * call exit or _c_exit. .cctor should be able to take care of
     * this.
     */
    if ( !managedapp )
        exit(mainret);
 
    if (has_cctor == 0)
        _cexit();
 
}
__except ( _XcptFilter(GetExceptionCode(), GetExceptionInformation()) )
{
    /*
     * Should never reach here
     */
 
    mainret = GetExceptionCode();
 
    /*
     * Note that if the exe is managed app, we don't really need to
     * call exit or _c_exit. .cctor should be able to take care of
     * this.
     */
    if ( !managedapp )
        _exit(mainret);
 
    if (has_cctor == 0)
        _cexit();
} /* end of try - except */
 
return mainret;