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While trying to solve a previously asked SO question of mine, I've find that even without my threads, the problem occurs.

what I have now , is a really simple single-threaded code , that calls - NetServerEnum() . when returned, it calls NetApiBufferFree() and return from main, which supposed to end the process. at that point, my thread truly ends, but the process won't exit , as there are 4 threads opened (not by me):

1 * ntdll.dll!TplsTimerSet+0x7c0 (stack is at ntdll.dll!WaitForMultipleObjects)

(This one opened upon the call to NetServerEnum())

3 * ndll.dll!RtValidateHeap+0x170 (stack is at ntdll.dll!ZwWaitWorkViaWorkerFactory+0xa)

(These are open when my code returns)

UPDATE: If I kill the thread running ntdll.dll!TplsTimerSet+0x7c0 externally (using process explorer) , before return of main(), the program exit gracefully. I thought it might be useful to know.

UPDATE2: (some more tech info) I'm using: MS Visual Studio 2010 Ultimate x64 (SP1Rel) on Win7 Enterprise SP1 Code is C (but compile as c++ switch is on) Subsystem: WINDOWS Compiler: cl.exe (using IDE) all other parameters are default.

I'm Using a self modified entry point (/ENTRY:"entry") , and it is the only function In my program):

int entry(void)
{
SERVER_INFO_101* si;
DWORD a,b;
NET_API_STATUS c;
c = NetServerEnum ( NULL , 101 , (LPBYTE*) &si , MAX_PREFERRED_LENGTH , &b ,  &a  , SV_TYPE_WORKSTATION, NULL , 0 );

c = NetApiBufferFree (si);

Sleep(1000);

return 0;

}

all the tested mentioned before where preformed inside a windows domain network of about 100 units.

UPDATE 3: This problem does not occur when tested on a (non-virtual) WinXP 32bit. (same binary, though for the Win7 x64 two binary were tested - 32bit over WOW , and native x64)

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1 回答 1

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当您使用自定义入口点时，您将绕过运行时库，这意味着您有责任退出进程。如果没有更多线程在运行，该进程将隐式退出，但正如您所发现的，操作系统可能会代表您创建您无法控制的线程。

在您的情况下，您需要做的就是ExitProcess在函数末尾显式调用entry()。

int entry(void)
{
   SERVER_INFO_101* si;
   DWORD a,b;
   NET_API_STATUS c;

   c = NetServerEnum ( NULL , 101 , (LPBYTE*) &si , MAX_PREFERRED_LENGTH , &b ,  &a  , SV_TYPE_WORKSTATION, NULL , 0 );

   c = NetApiBufferFree (si);

   Sleep(1000);

   ExitProcess(0);
}

在没有调用ExitProcess自定义入口点的情况下，您看到的行为与预期的一样。

于 2013-07-04T23:14:34.950 回答