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Date: Wed, 24 May 2006 11:01:05 +0200
From: Ralf Habacker <ralf DOT habacker AT freenet DOT de>
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To: cygwin AT cygwin DOT com
Subject: Re: 1.5.19: changes have broken Qt3
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Brian Dessent schrieb:
> Ralf Habacker wrote:
> 
>> Running this testcase results in an internal exception in
>> pthread_mutexattr_init()
>>
>> Program received signal SIGSEGV, Segmentation fault.
>> 0x610b1005 in pthread_mutexattr_init (attr=0x404040) at
>> ../../../../src/winsup/cygwin/thread.cc:129
>> 129       if ((*object)->magic != magic)
> 
> Sigh.  We've been through this ad nauseum in the archives.  This is how
> it's supposed to work, there's nothing wrong here.  

But in the case of pthread_mutexattr_init() this exception results in an
abort of pthread_mutexattr_init(), which should not be. See my other
mail in this thread.



> Gdb doesn't know any
> better though, and reports it as a SIGSEGV, when it is not.  Did you not
> notice that when you run the program outside of the debugger it does not
> fault?  
There is no segfault, but it does not work as expected e.g.
pthread_mutexattr_init() does not fill the pthread_mutexattr_t struct
given as parameter.

If you use a recent Cygwin snapshot and a gdb built from CVS you
> see no such fault, because this defect in gdb has been fixed.
> 

Ralf

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