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From "Mladen Turk" <mladen.t...@mail.inet.hr>
Subject RE: [PATCH] WIN9x - Apache has caused an error in LIBAPR.DLL
Date Sat, 11 Aug 2001 18:21:37 GMT
> -----Original Message-----
> From: Cliff Woolley [mailto:cliffwoolley@yahoo.com]
> Sent: Saturday, August 11, 2001 6:28 PM
> To: Mladen Turk
> Cc: APR Dev List
> Subject: Re: [PATCH] WIN9x - Apache has caused an error in LIBAPR.DLL
>
>
> On Sat, 11 Aug 2001, Mladen Turk wrote:
>
> > I think that someone noticed that when shutting down the Apache on WIN9x
> > platform you get the exclamation error box stating : "Apache
> has caused an
> > error in LIBAPR.DLL ...." ?
>
> I'm amazed that you got Apache to work even that well on Win9x.  I was
> under the impression that it was totally fubar at the moment.  <shrug>
>
> > The error is in locks/win32/locks.c lock_cleanup function that
> gets the NULL
> > as a function parameter. I wasn't able to track the source of
> the call that
> > send the NULL value to apr_lock_destroy but here is the patch
> that checks if
> > the function value is NULL and returns not APR_SUCCESS in such a case
>
> -1.  APR does not typically check parameter correctness.  We leave it up
> to the caller to give us a parameter that's valid on the assumption that
> if they can't manage to do that then they might not check to see if we
> gave them an error return code either.  Besides, if they pass in NULL,
> it's easier to debug a SEGV than a return value that gets either ignored
> or propagated to some time in the future when it's likely harder to figure
> out exactly what happened.
>
> Thanks for looking into this, but we need to keep looking for the source
> of the NULL parameter rather than bandaiding it.

I found the bugger.
It's in the mpm_winnt.c, and the couse is the queue lock that gets
initialized only on WINNT, don't know if it should on WIN9x too?
Well here is the patch:

--- mpm_winnt.c.old	Sat Aug  4 09:20:14 2001
+++ mpm_winnt.c	Sat Aug 11 20:12:32 2001
@@ -1167,7 +1167,8 @@

     CloseHandle(allowed_globals.jobsemaphore);
     apr_lock_destroy(allowed_globals.jobmutex);
-    apr_lock_destroy(qlock);
+    if (osver.dwPlatformId != VER_PLATFORM_WIN32_WINDOWS)
+        apr_lock_destroy(qlock);

     apr_pool_destroy(pchild);
     CloseHandle(exit_event);

MT


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