From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-3.3 required=5.0 tests=MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 23035 invoked from network); 29 Oct 2020 16:21:14 -0000 Received: from mother.openwall.net (195.42.179.200) by inbox.vuxu.org with ESMTPUTF8; 29 Oct 2020 16:21:14 -0000 Received: (qmail 22108 invoked by uid 550); 29 Oct 2020 16:21:11 -0000 Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Reply-To: musl@lists.openwall.com Received: (qmail 22084 invoked from network); 29 Oct 2020 16:21:10 -0000 Date: Thu, 29 Oct 2020 12:20:57 -0400 From: Rich Felker To: musl@lists.openwall.com Cc: Milan =?utf-8?Q?P=2E_Stani=C4=87?= Message-ID: <20201029162057.GS534@brightrain.aerifal.cx> References: <20201026005028.GI534@brightrain.aerifal.cx> <20201026005912.GJ534@brightrain.aerifal.cx> <20201027211735.GV534@brightrain.aerifal.cx> <20201028185608.GG534@brightrain.aerifal.cx> <20201028230610.GA3269@arya.arvanta.net> <20201029161348.GA2947641@port70.net> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20201029161348.GA2947641@port70.net> User-Agent: Mutt/1.5.21 (2010-09-15) Subject: Re: [musl] [PATCH v2] MT fork On Thu, Oct 29, 2020 at 05:13:48PM +0100, Szabolcs Nagy wrote: > * Milan P. Stanić [2020-10-29 00:06:10 +0100]: > > On Wed, 2020-10-28 at 14:56, Rich Felker wrote: > > > On Tue, Oct 27, 2020 at 05:17:35PM -0400, Rich Felker wrote: > > > > > > > > > > > > Will follow up with draft patch for testing. > > > > > > > > > > Patch attached. It should suffice for testing and review of whether > > > > > there are any locks/state I overlooked. It could possibly be made less > > > > > ugly too. > > > > > [...] > > > > > > > > Another bug: > > > > [...] > > > > > > And an updated version of the patch with both previously reported bugs > > > fixed, for the purpose of users/distros wanting to test without > > > manually fixing up the patch. Attached. > > > > Applied this patch on top of current musl master, build it on Alpine and > > installed. > > > > Tested by building ruby lang. Works fine. > > Also tested building zig lang, works fine. > > But crystal lang builds fine, but running it hangs. strace shows: > > ------------- > > [pid 5573] futex(0x7efc50fba9e4, FUTEX_WAIT_PRIVATE, 2, NULL > > [pid 5568] futex(0x7efc5118f984, FUTEX_REQUEUE_PRIVATE, 0, 1, 0x7efc514b67a4) = 1 > > [pid 5568] futex(0x7efc514b67a4, FUTEX_WAKE_PRIVATE, 1) = 1 > > [pid 5571] <... futex resumed>) = 0 > > [pid 5568] futex(0x7efc511099e4, FUTEX_WAIT_PRIVATE, 2, NULL > > [pid 5571] futex(0x7efc510409e4, FUTEX_WAIT_PRIVATE, 2, NULL > > ------------- > > where it hangs. > > try to attach gdb to the process that hang and do > > thread apply all bt Thanks -- I meant to reply to this earlier but forgot to. > (make sure musl-dbg is installed) If using a replacement musl, I think you'd just ensure it's built with -g rather than relying on distro musl-dbg package, which will be for a mismatched build/version. Rich