From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-451558-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 19200 invoked by alias); 14 May 2014 01:58:51 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
Received: (qmail 17479 invoked by uid 48); 14 May 2014 01:58:43 -0000
From: "hideaki.kimura at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/60966] std::call_once sometime hangs
Date: Wed, 14 May 2014 01:58:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: libstdc++
X-Bugzilla-Version: 4.8.2
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: hideaki.kimura at gmail dot com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields: cc
Message-ID: <bug-60966-4-4Zo5UuzShH@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-60966-4@http.gcc.gnu.org/bugzilla/>
References: <bug-60966-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2014-05/txt/msg01250.txt.bz2

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60966

Hideaki Kimura <hideaki.kimura at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hideaki.kimura at gmail dot com

--- Comment #11 from Hideaki Kimura <hideaki.kimura at gmail dot com> ---
Hi, I'm also (seemingly) hitting this issue.
When I run my program with valgrind, I get what Thomas reported.

==22319== Invalid read of size 4
==22319==    at 0x370940D201: pthread_once (pthread_once.S:111)
==22319==    by 0x4C80524: ....<my functions> (gthr-default.h:699)
...
==22319==  Address 0x52c52a4 is 132 bytes inside a block of size 136 free'd
==22319==    at 0x4A07991: operator delete(void*) (in
/usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==22319==    by 0x4C82456: ...<my function> (shared_ptr_base.h:161)
==22319==    by 0x370C4B52AF: execute_native_thread_routine (thread.cc:84)
==22319==    by 0x3709407F32: start_thread (pthread_create.c:309)
==22319==    by 0x37090F4DEC: clone (clone.S:111)
==22319== 

My environment is Fedora 20, x86_64, g++ (GCC) 4.8.2 20131212 (Red Hat
4.8.2-7).
Any workaround?