From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
	id 3EFB93858410; Thu, 24 Nov 2022 09:41:12 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 3EFB93858410
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1669282872;
	bh=WyA7KnGIzgBdgoKzwlb5MmEXy5X79/hS6lBOxCZUS24=;
	h=From:To:Subject:Date:From;
	b=wykj1urkcTziD8UoebUfE+ixg4SAyABYkHSR491yRgx7/stMkWnT0TeHNJhCBNejd
	 Q042puMPOofQ1ZEZEfEQkfEPl6FgI5wPOaI0t+3LRFcLY87cjW0wmXOhtDIMTyFSFD
	 Z0ZiGjEVgTXt1bsyMm3lKaEITYK+RYfw3wyJtck0=
From: "pg.ensiie at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/107857] New: recursive_mutex misses destructor if
 non-function call initialization is used
Date: Thu, 24 Nov 2022 09:41:12 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: libstdc++
X-Bugzilla-Version: 11.2.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: pg.ensiie at gmail dot com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
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: bug_id short_desc product version bug_status
 bug_severity priority component assigned_to reporter target_milestone
Message-ID: <bug-107857-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107857

            Bug ID: 107857
           Summary: recursive_mutex misses destructor if non-function call
                    initialization is used
           Product: gcc
           Version: 11.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pg.ensiie at gmail dot com
  Target Milestone: ---

Hello,

Using GCC 11.2.0 with mingw-w64 9.0.0.

I notice that there is a memory leak when using a std::recursive_mutex, as
described in this issue : https://sourceforge.net/p/mingw-w64/bugs/851/. I
reproduce this bug.

After some research, I discover that same problem has occured for std::mute=
x,
that was solved by this fix : https://sourceforge.net/p/mingw-w64/bugs/851/

The solution is to use function initialized and destructor for recursive_mu=
tex
as it is done for mutex when using pthread on windows. Defining
_GTHREAD_USE_RECURSIVE_MUTEX_INIT_FUNC in os_defines.h fixes the bug.

Even if I do not use it, I wonder if _GTHREAD_USE_COND_INIT_FUNC should als=
o be
set for condition variables.=