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Date: Sun, 8 Apr 2001 19:35:22 -0400
From: Christopher Faylor <cgf AT redhat DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: G++ guru's please comment - Re: FW: pthread_create problem in Cygwin 1.1.8-2]
Message-ID: <20010408193522.B19783@redhat.com>
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References: <B9095DA2D217D511929B00A0C94989FE01C723 AT obelix DOT askesis DOT nl> <001301c0c071$d5aaec80$0200a8c0 AT lifelesswks>
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In-Reply-To: <001301c0c071$d5aaec80$0200a8c0@lifelesswks>; from robert.collins@itdomain.com.au on Mon, Apr 09, 2001 at 07:21:09AM +1000

On Mon, Apr 09, 2001 at 07:21:09AM +1000, Robert Collins wrote:
>----- Original Message -----
>From: "Joost Kraaijeveld" <J DOT Kraaijeveld AT Askesis DOT nl>
>To: "'Robert Collins'" <robert DOT collins AT itdomain DOT com DOT au>
>Sent: Monday, April 09, 2001 1:45 AM
>Subject: RE: G++ guru's please comment - Re: FW: pthread_create problem
>in Cygwin 1.1.8-2]
>
>> > Also, printf doesn't appear to be atomic and threadsafe (lines got
>> > interspersed). You might be hitting something there, but I doubt it
>> > (crashing in the wrong place).
>> I have noticed that, but crashing was a little bit more urgent than a
>> non-thread safe printf.
>>
>>
>>>1) It's possible it's a problem with the thread exiting code, could you
>>>try using a pthread_exit call instead of return and report back.
>>I replaced return 0 with pthread_exit(0) andf now id does not crash on
>>any computer.
>
>hmm.  This really needs a compiler expert to jump in and comment now
>(that reduces the likelyhood that it's a thread specific fault.

It's not likely that it is a compiler problem.  pthread_create calls
__pthread_create which calls the user function.  If the user function
returns it should it a __pthread_exit.  If it doesn't hit the
__pthread_exit, then that would mean that the stack is corrupted
somehow.

That should be pretty simple to debug.

>>> 2) What cygwin1.dll are you using? I'm using a custom build ~= to the
>> > latest snapshot.
>> $ uname -a
>> CYGWIN_NT-5.0 ABRARACOURCIX 1.1.8(0.34/3/2) 2001-01-31 10:08 i686 unknown

i.e., not a snapshot.

cgf

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