From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DC24FC32771 for ; Mon, 6 Jan 2020 07:46:28 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A1D05215A4 for ; Mon, 6 Jan 2020 07:46:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A1D05215A4 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bugs.launchpad.net Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:49070 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ioN5n-0008Ga-Sy for qemu-devel@archiver.kernel.org; Mon, 06 Jan 2020 02:46:27 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:36101) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ioN56-0007qJ-Aa for qemu-devel@nongnu.org; Mon, 06 Jan 2020 02:45:45 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ioN54-0005yq-S3 for qemu-devel@nongnu.org; Mon, 06 Jan 2020 02:45:44 -0500 Received: from indium.canonical.com ([91.189.90.7]:56388) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1ioN54-0005xy-MZ for qemu-devel@nongnu.org; Mon, 06 Jan 2020 02:45:42 -0500 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1ioN53-0003Y3-5G for ; Mon, 06 Jan 2020 07:45:41 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 16D802E80C8 for ; Mon, 6 Jan 2020 07:45:41 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Mon, 06 Jan 2020 07:39:45 -0000 From: Fabian Godehardt <1856837@bugs.launchpad.net> To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=New; importance=Undecided; assignee=None; X-Launchpad-Bug-Tags: arm gcc9.2 segfault X-Launchpad-Bug-Information-Type: Public X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: no X-Launchpad-Bug-Commenters: fgodeh pmaydell X-Launchpad-Bug-Reporter: Fabian Godehardt (fgodeh) X-Launchpad-Bug-Modifier: Fabian Godehardt (fgodeh) References: <157666594314.15384.3778802807711797985.malonedeb@wampee.canonical.com> Message-Id: <157829638549.28004.14832998592685884564.malone@chaenomeles.canonical.com> Subject: [Bug 1856837] Re: qemu 4.2.0 arm segmentation fault with gcc 9.2 X-Launchpad-Message-Rationale: Subscriber (QEMU) @qemu-devel-ml X-Launchpad-Message-For: qemu-devel-ml Precedence: bulk X-Generated-By: Launchpad (canonical.com); Revision="bceb5ef013b87ef7aafe0755545ceb689ca7ac60"; Instance="production-secrets-lazr.conf" X-Launchpad-Hash: 88b6b6f469a104b7d359e7bc3a9627fb15bd02b9 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 91.189.90.7 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Bug 1856837 <1856837@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Sorry for the delay. I added the sysroot, the binary and the files causing = the segfault. Please let me know if there is something missing. I used the following commands to let it run: export LD_LIBRARY_PATH=3D/opt/qemu-test/test1/lib /opt/qemu-test/test1/bin/qemu-arm "/opt/qemu-test/test1/files/mksnapshot.ar= m" --log-snapshot-positions --logfile "/tmp/snapshot.log" --random-seed 314= 159265 "/tmp/snapshot.cc" Thanks again! Fabian ** Attachment added: "Tarball containing sysroot, qemu binary and files" https://bugs.launchpad.net/qemu/+bug/1856837/+attachment/5317851/+files/= qemu-segfault-v8.tar.xz -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1856837 Title: qemu 4.2.0 arm segmentation fault with gcc 9.2 Status in QEMU: New Bug description: As discussed with f4bug yesterday on IRC here comes the bug description. I'm building/configured qemu-4.2.0 on an x86_64 (gcc (Debian 6.3.0-18+deb9u1) 6.3.0 20170516) with target-list "arm-softmmu,arm- linux-user" and debug enabled. I use the arm-linux-user variant, "qemu-arm". Then i'm trying to cross-compile (arm gcc) an old version of googles v8 (as i need this version of the lib for binary compatibility) which uses qemu during build. It worked with gcc 5.4.0 but not with 9.2.0. I also tried with 6.5.0, 7.4.0 and 8.3.0 but those are also causing the same segmentation fault. The executed command wich breaks qemu is: qemu-arm /tmp/build/out/arm.release/mksnapshot.arm --log-snapshot- positions --logfile /tmp/build/out/arm.release/obj.host/v8_snapshot/geni/snapshot.log --random-seed 314159265 /tmp/build/out/arm.release/obj.host/v8_snap The printed error message is: ARMv7=3D1 VFP3=3D1 VFP32DREGS=3D1 NEON=3D0 SUDIV=3D0 UNALIGNED_ACCESSES= =3D1 MOVW_MOVT_IMMEDIATE_LOADS=3D0 USE_EABI_HARDFLOAT=3D1 qemu: uncaught target signal 11 (Segmentation fault) - core dumped Calling qemu with gdb gives the following information: Thread 1 "qemu-arm" received signal SIGSEGV, Segmentation fault. 0x0000555555d63d11 in static_code_gen_buffer () and (gdb) bt #0 0x0000555555d63d11 in static_code_gen_buffer () #1 0x0000555555628d58 in cpu_tb_exec (itb=3D, cpu=3D0x55= 5557c33930) at = /tmp/build/qemu/accel/tcg/cpu-exec.c:172 #2 cpu_loop_exec_tb (tb_exit=3D, last_tb=3D, tb=3D, = cpu=3D0x555557c33930) at /tmp/build/qemu/accel/tcg/cpu-exec.c:618 #3 cpu_exec (cpu=3Dcpu@entry=3D0x555557c2b660) at /tmp/build/qemu/accel= /tcg/cpu-exec.c:731 #4 0x0000555555661578 in cpu_loop (env=3D0x555557c33930) at /tmp/build/= qemu/linux-user/arm/cpu_loop.c:219 #5 0x00005555555d6d76 in main (argc=3D, argv=3D, envp=3D) at /tmp/build/qemu/linux-user/main.c:865 Calling qemu-arm with debug switch "-d in_asm,int,op_opt" shows the log in the attached file. Thanks for any hints! Fabian To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1856837/+subscriptions