From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 43792 invoked by alias); 3 Nov 2015 11:20:48 -0000 Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sourceware.org Received: (qmail 43777 invoked by uid 89); 3 Nov 2015 11:20:48 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-1.9 required=5.0 tests=AWL,BAYES_00,SPF_HELO_PASS,T_RP_MATCHES_RCVD autolearn=ham version=3.3.2 X-HELO: mx1.redhat.com Received: from mx1.redhat.com (HELO mx1.redhat.com) (209.132.183.28) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES256-GCM-SHA384 encrypted) ESMTPS; Tue, 03 Nov 2015 11:20:46 +0000 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by mx1.redhat.com (Postfix) with ESMTPS id CC95BC0D61AD; Tue, 3 Nov 2015 11:20:45 +0000 (UTC) Received: from [127.0.0.1] (ovpn01.gateway.prod.ext.ams2.redhat.com [10.39.146.11]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id tA3BKiuq027452; Tue, 3 Nov 2015 06:20:45 -0500 Message-ID: <5638988C.5070601@redhat.com> Date: Tue, 03 Nov 2015 11:20:00 -0000 From: Pedro Alves User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 MIME-Version: 1.0 To: fracting@gmail.com CC: gdb-patches@sourceware.org Subject: Re: [PATCH 00/11] C++/MinGW patches References: <1446492970-21432-1-git-send-email-palves@redhat.com> <5637C1FA.2060708@redhat.com> <5637CB96.4010106@redhat.com> In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-SW-Source: 2015-11/txt/msg00063.txt.bz2 On 11/03/2015 10:46 AM, Qian Hong wrote: > Hi Pedro, > > On Tue, Nov 3, 2015 at 4:46 AM, Pedro Alves wrote: >> Thanks! Note you'll need to configure gdb with --enable-build-with-cxx >> in order to make it build with a C++ compiler. > > I think I have some interesting testing result for you ;-) > > I compiled latest gdb in your branch on MSYS2 on Windows [1], with my > additional modification to enable build-with-cxx. > > It compiles fine. However, when debugging a simple hello world > program, I got error below: > "This application has requested the Runtime to terminate it in an > unusual way. Please contact the application's support team for more > information." when debugging a simple hello world program. " > > Steps to reproduce: > 1. $ cat hello.c > # include > int main(void) > { > int a = 10; > printf("haha a is %d\n", 10); > return 0; > } > > 2. compile with MSYS2 mingw gcc > $ gcc hello.c -g -O0 -o hello.exe > > 3. debugging hello.exe with gdb (build with cxx) > $ gdb hello.exe > > 3.1. set a breakpoint on main() > 3.2. type `c` > > expect result: > gdb should report that the program is not start yet. > > actual result: > gdb exit with error message: "This application has requested the > Runtime to terminate it in an unusual way. Please contact the > application's support team for more information." when debugging a > simple hello world program. " Hmm. Sounds like an uncaught C++ exception. I guess we could try making C++ mode use setjmp/longjmp exceptions like C mode, for confirmation. > > Then I tried build gdb again without build-with-cxx, and this error > disappear, gdb works as expect, at least for simple hello world. > > Cross-reference: feature request for gdb-git package in MSYS2 [2] > > [1] https://github.com/Alexpux/MINGW-packages/tree/master/mingw-w64-gdb-git > [2] https://github.com/Alexpux/MINGW-packages/issues/862 > > > Thanks, Pedro Alves