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=-8.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=ham 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 EFFCBC433B4 for ; Mon, 26 Apr 2021 09:02:15 +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 319EF61184 for ; Mon, 26 Apr 2021 09:02:15 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 319EF61184 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]:37500 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lax87-0006uV-PU for qemu-devel@archiver.kernel.org; Mon, 26 Apr 2021 05:02:13 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:33150) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lax76-0006Dy-3p for qemu-devel@nongnu.org; Mon, 26 Apr 2021 05:01:08 -0400 Received: from indium.canonical.com ([91.189.90.7]:46584) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lax73-0006LC-SK for qemu-devel@nongnu.org; Mon, 26 Apr 2021 05:01:07 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1lax71-0004c0-Ce for ; Mon, 26 Apr 2021 09:01:03 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 4409D2E815C for ; Mon, 26 Apr 2021 09:01:03 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Mon, 26 Apr 2021 08:54:15 -0000 From: Ariadne Conill <1895305@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: linux-user X-Launchpad-Bug-Information-Type: Public X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: no X-Launchpad-Bug-Commenters: kaniini z3ntu X-Launchpad-Bug-Reporter: Luca Weiss (z3ntu) X-Launchpad-Bug-Modifier: Ariadne Conill (kaniini) References: <159983459206.747.8861900115459003190.malonedeb@chaenomeles.canonical.com> Message-Id: <161942725570.11585.15295122816790645672.malone@wampee.canonical.com> Subject: [Bug 1895305] Re: pthread_cancel fails with "RT33" with musl libc 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="f9f562f07f129de414c16be22a405ff0964e0018"; Instance="production" X-Launchpad-Hash: 5ea5d77bdbc2630ac7e11fd377a76b411f562631 Received-SPF: none client-ip=91.189.90.7; envelope-from=bounces@canonical.com; helo=indium.canonical.com X-Spam_score_int: -66 X-Spam_score: -6.7 X-Spam_bar: ------ X-Spam_report: (-6.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.25, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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 1895305 <1895305@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This was a downstream regression in Alpine caused by an attempt to make older Go binaries work under emulation. We have reverted the patch there. -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1895305 Title: pthread_cancel fails with "RT33" with musl libc Status in QEMU: New Bug description: From my testing it seems that QEMU built against musl libc crashes on pthread_cancel cancel calls - if the binary is also built with musl libc. Minimal sample: #include #include #include void* threadfunc(void* ignored) { while (1) { pause(); } return NULL; } int main() { pthread_t thread; pthread_create(&thread, NULL, &threadfunc, NULL); sleep(1); pthread_cancel(thread); printf("OK, alive\n"); } In an Alpine Linux aarch64 chroot (on an x86_64 host) the binary will just output RT33 and has exit code 161. Using qemu-aarch64 on an x86_64 host results in the output (fish shell) fish: =E2=80=9Cqemu-aarch64-static ./musl-stat=E2=80=A6=E2=80=9D termin= ated by signal Unknown (Unknown) or (bash) Real-time signal 2 and exit code 164. It doesn't matter whether the binary is linked dynamically or static. You can see my test results in the following table: | | QEMU glibc | QEMU musl | |----------------------|------------|-----------| | binary glibc dynamic | =E2=9C=93 | =E2=9C=93 | | binary glibc static | =E2=9C=93 | =E2=9C=93 | | binary musl dynamic | =E2=9C=93 | =E2=9C=97 | | binary musl static | =E2=9C=93 | =E2=9C=97 | Both QEMU builds are v5.1.0 (glibc v2.32 / musl v1.2.1) I've uploaded all my compile and test commands (plus a script to conveniently run them all) to https://github.com/z3ntu/qemu- pthread_cancel . It also includes the built binaries if needed. The test script output can be found at https://github.com/z3ntu/qemu- pthread_cancel/blob/master/results.txt Further links: - https://gitlab.com/postmarketOS/pmaports/-/issues/190#note_141902075 - https://gitlab.com/postmarketOS/pmbootstrap/-/issues/1970 To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1895305/+subscriptions