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Tue, 05 May 2026 08:05:49 -0600 From: Tom Tromey To: Pedro Alves Cc: gdb-patches@sourceware.org Subject: Re: [PATCH] Windows gdb: Avoid hang second attach/run In-Reply-To: <20260505121823.1442331-1-pedro@palves.net> (Pedro Alves's message of "Tue, 5 May 2026 13:18:23 +0100") References: <20260505121823.1442331-1-pedro@palves.net> X-Attribution: Tom Date: Tue, 05 May 2026 08:05:47 -0600 Message-ID: <87jytieytg.fsf@tromey.com> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - box5379.bluehost.com X-AntiAbuse: Original Domain - sourceware.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - tromey.com X-BWhitelist: no X-Source-IP: 75.166.225.82 X-Source-L: No X-Exim-ID: 1wKGPF-00000001ojD-2LOl X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: 75-166-225-82.hlrn.qwest.net (bapiya) [75.166.225.82]:60648 X-Source-Auth: tom+tromey.com X-Email-Count: 4 X-Org: HG=bhshared;ORG=bluehost; X-Source-Cap: ZWx5bnJvYmk7ZWx5bnJvYmk7Ym94NTM3OS5ibHVlaG9zdC5jb20= X-Local-Domain: yes X-CMAE-Envelope: MS4xfDksM+MV5KrN5SzIJg2tZErMzuZ2lYdtPrV1LwZUxZ9I1TNFx0F43W6Hb0t6t8KJYlfn4RXh7NNBvFp2P/xjC//skFOu5Q0xf2xF86a44U32v9K4MNpC k4zEQK55Hib4WdNHp3ZFynaAXhnFKq46hsdorfK3C1qv80KI4W3onYEbIehNmf6E2zrhjzIWJTLQfzrbqhoK4C7gB1ul+p7O6Tk= X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gdb-patches-bounces~public-inbox=simark.ca@sourceware.org >>>>> "Pedro" == Pedro Alves writes: Pedro> gdb.base/attach.exp starts a second inferior and tries to attach the Pedro> second inferior to the same process that inferior 1 is already Pedro> debugging. The point is to make sure that the backend errors out when Pedro> it tries to attach to a process that is already being debugged. Pedro> windows_nat_target::attach and windows_nat_target::create_inferior Pedro> both hang in this situation, because they call into do_synchronously, Pedro> which hangs because the 'process_thread' thread is blocked in Pedro> WaitForDebugEvent. Forgot the tag. Approved-By: Tom Tromey Tom