From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 97776 invoked by alias); 27 Mar 2018 21:58:43 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Received: (qmail 97734 invoked by uid 89); 27 Mar 2018 21:58:42 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-2.2 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,KAM_NUMSUBJECT,RCVD_IN_DNSWL_NONE,SPF_PASS autolearn=no version=3.3.2 spammy=bus, happened, H*RU:74.125.82.193, Hx-spam-relays-external:74.125.82.193 X-HELO: mail-ot0-f193.google.com X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=sBSLqpySwZY/yal4IdA8zC0iORrJ8KG/WQgjoPzGnNc=; b=ogw2FJX4MPH+cdhBZqqDk4wunf9nE/b84mAXkfcosJTOd62MRInITACRp54Mrt7RxU 6TLRWFdiUrwm832CWlF0jU7tv23e4pAFVr1I+Jj2LqriWT6FXFR/uE3PO0AHsygZwS5L bSOvw7h/nHnsigl5Id/kxQX2Ptkd8g70DkcCSHcdBYcjCXJb4t9FIcyDEhDCFNpUcqrm OUPWS0tQqpR9RQgumBwFoWIOofypL9yWYdVN10nwsCttuK5Bvc1IoitPy5qLdO5WmgG5 MDEshyPAKfbbuRg3X356Vm08RQHL2o3gOy+58KeezIFr/tFTkdAYxiL7aStVPs6uA7Yb MS8A== X-Gm-Message-State: AElRT7HMPqs0BG7EU/Wld3TpuFXAAAQ7D6aaYtzGBlCCh2t0YW5IinGS rHF2U+TprJMJrcypQaODhEGNM7kbhLfM/UVXpaw= X-Google-Smtp-Source: AIpwx48+1hcpgYzXDerhbSMqctEUi7LkCmaCgjBOsaDSfTd/jH1+z6uonxy8T8bQYK7WIy3oQeLe9pcmNezmfjUgjNI= X-Received: by 2002:a9d:720a:: with SMTP id u10-v6mr717168otj.332.1522187919453; Tue, 27 Mar 2018 14:58:39 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <20180327214707.GA4207@aurel32.net> References: <20180327214707.GA4207@aurel32.net> From: "H.J. Lu" Date: Tue, 27 Mar 2018 21:58:00 -0000 Message-ID: Subject: Re: SIGBUS failure for misc/tst-bz21269 on i386 To: Florian Weimer , GNU C Library Content-Type: text/plain; charset="UTF-8" X-SW-Source: 2018-03/txt/msg00577.txt.bz2 On Tue, Mar 27, 2018 at 2:47 PM, Aurelien Jarno wrote: > On 2018-03-14 14:34, Florian Weimer wrote: >> Has anyone else seen this failure? > > I do see the issue. I can reproduce it on both Debian and Fedora. > >> I saw it with this kernel: >> >> Linux buildvm-09.phx2.fedoraproject.org 4.15.3-300.fc27.x86_64 #1 SMP Tue >> Feb 13 17:02:01 UTC 2018 i686 i686 i386 GNU/Linux > > I am using 64-bit kernels: > > Linux fedora.local 4.13.12-300.fc27.x86_64 #1 SMP Wed Nov 8 16:38:01 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux > Linux ohm 4.15.0-1-amd64 #1 SMP Debian 4.15.4-1 (2018-02-18) x86_64 GNU/Linux > > >> The CPU has AVX2, but not AVX-512. I couldn't reproduce it on another AVX2 > > My CPU is a Core i3-5010U, so it has AVX2, but not AVX-512. > >> machine. The failure happened in the Fedora build environment, so I don't >> have a coredump. > > Here is the coredump that I can get: > > Thread 1 "tst-bz21269" received signal SIGBUS, Bus error. > 0x565564a0 in do_test () at ../sysdeps/unix/sysv/linux/i386/tst-bz21269.c:217 > 217 while (atomic_load (&ftx) != 0) > (gdb) bt > #0 0x565564a0 in do_test () at ../sysdeps/unix/sysv/linux/i386/tst-bz21269.c:217 > #1 0x56556bc2 in support_test_main (argc=, argv=0xffffd518, config=0xffffd424) at support_test_main.c:321 > #2 0x56556061 in main (argc=2, argv=0xffffd514) at ../support/test-driver.c:164 > (gdb) print &ftx > $1 = (atomic_uint *) 0x5655a0e0 > (gdb) print ftx > $2 = 0 > Which GCC are you using? How did you configure glibc? -- H.J.