From owner-freebsd-hackers@freebsd.org  Sun May  1 16:46:25 2016
Return-Path: <owner-freebsd-hackers@freebsd.org>
Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id D937DB29990
 for <freebsd-hackers@mailman.ysv.freebsd.org>;
 Sun,  1 May 2016 16:46:25 +0000 (UTC) (envelope-from trafdev@mail.ru)
Received: from smtp21.mail.ru (smtp21.mail.ru [94.100.179.250])
 (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 5A614108A
 for <freebsd-hackers@freebsd.org>; Sun,  1 May 2016 16:46:24 +0000 (UTC)
 (envelope-from trafdev@mail.ru)
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mail.ru;
 s=mail2; 
 h=Content-Type:MIME-Version:Date:Message-ID:Subject:From:To;
 bh=s51i1oKboBPd6Q1ag+WpBgwZLiQ0D3Lns1fa/8I+j94=; 
 b=TC8EopatuxKdouA/CxOoWvZs9C4lkJZtV+Rk+BSLjpNMmzhmLl44CSO2CR+mvBrSKHeHxv+K1/KoX/5Dniu6B6wnbxDMO3yYS9xnhvm2yQOaaEDwkSsyj+wqc5f2HQIezZj/v5daAILmlWYtLmGxzxoUwvgubJhsxO9tSL0DcXE=;
Received: from c-50-156-112-176.hsd1.ca.comcast.net ([50.156.112.176]:44391
 helo=[192.168.1.116])
 by smtp21.mail.ru with esmtpa (envelope-from <trafdev@mail.ru>)
 id 1awuVb-0006hE-9J
 for freebsd-hackers@freebsd.org; Sun, 01 May 2016 19:46:16 +0300
To: freebsd-hackers@freebsd.org
From: trafdev <trafdev@mail.ru>
Subject: corrupted stack (backtrace) from sigaction handler
Message-ID: <94c8456c-a9b4-77a5-6622-418fc59d61d7@mail.ru>
Date: Sun, 1 May 2016 09:46:10 -0700
User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:45.0) Gecko/20100101
 Thunderbird/45.0
MIME-Version: 1.0
X-Mras: OK
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
X-Content-Filtered-By: Mailman/MimeDel 2.1.22
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
 <freebsd-hackers.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-hackers>, 
 <mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers/>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
 <mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 01 May 2016 16:46:26 -0000

Hello!

Could you launch attached code on your machine and respond with an 
output (and FreeBSD version).

Here is mine (FreeBSD 10.2) output:

	stack dump [0]  0x40d4e5 <_Z9stackdumpPKc+0x85> at 
/ara/devel/sandbox/new/cpp/Release/cpp
	stack dump [1]  0x40dafd <_Z13signalHandleriP9__siginfoPv+0x3d> at 
/ara/devel/sandbox/new/cpp/Release/cpp
	stack dump [2]  0x801f30997 <pthread_sigmask+0x497> at /lib/libthr.so.3
	stack dump [3]  0x801f301a8 <pthread_getspecific+0xdd8> at /lib/libthr.so.3

All info before signalHandler (foo/foo2 functions) is missed.