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X-HELO: calimero.vinschen.de
Date: Thu, 21 Apr 2016 09:49:17 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Cc: "Canham, Timothy K (348C)" <timothy DOT k DOT canham AT jpl DOT nasa DOT gov>
Subject: Re: pthread_attr_init() returning errors
Message-ID: <20160421074917.GB18530@calimero.vinschen.de>
Reply-To: cygwin AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com,	"Canham, Timothy K (348C)" <timothy DOT k DOT canham AT jpl DOT nasa DOT gov>
References: <E8EB3633A6A4594CA063A3FCBC82C18C3621F0F6 AT ap-embx-sp40 DOT RES DOT AD DOT JPL> <20160420105016 DOT GB26118 AT calimero DOT vinschen DOT de> <E8EB3633A6A4594CA063A3FCBC82C18C3621FDE3 AT ap-embx-sp40 DOT RES DOT AD DOT JPL> <20160420144013 DOT GC25668 AT calimero DOT vinschen DOT de> <E8EB3633A6A4594CA063A3FCBC82C18C3622039A AT ap-embx-sp40 DOT RES DOT AD DOT JPL> <5717C800 DOT 4080009 AT raelity DOT com>
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On Apr 20 11:18, Ernie Rael wrote:
> On 4/20/2016 10:22 AM, Canham, Timothy K (348C) wrote:
> >I think I understand what happened now. The call to pthread_attr_init() =
is contained within a function we use to start threads. It is called succes=
sive times and it fails on the second call. It would appear that the stack =
entry gets laid out the exact same way as the previous call, so pthread_att=
r_init() sees the previous pthread_attr_t. I added a memset() of att and th=
e issue went away. It looks like that is a good practice anyway.
>=20
> Best practice might be using pthread_attr_destroy(attr).

Good point.  Not calling pthread_attr_destroy on abandoned
pthread_attr_t also results in memory leaks on Cygwin.


Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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