From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 2493 invoked by alias); 14 May 2014 19:00:40 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org Received: (qmail 2456 invoked by uid 48); 14 May 2014 19:00:36 -0000 From: "npl at chello dot at" To: gcc-bugs@gcc.gnu.org Subject: [Bug libgcc/56846] _Unwind_Backtrace on ARM and noexcept Date: Wed, 14 May 2014 19:00:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: libgcc X-Bugzilla-Version: 4.7.2 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: npl at chello dot at 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: Message-ID: In-Reply-To: References: 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/msg01330.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56846 --- Comment #4 from npl at chello dot at --- I just found the similar entry on launchpad. I have to recall this from memory, as its been a long time since I played around with it. The issue of repeating entries occurs if you have a function wihout stack-unwinding information. These are as far as I know: * .cantunwind in asm, probably plain asm too * "C compiled" compiled without flags to generate unwind tables * C++ compiled function with noexcept Further, the compiled code behaves right when exceptions are thrown (std::terminate), so the tables and generated code should be fine. The issue should thus be in libgcc`s implementation of the _Unwind_Backtrace function.