From owner-freebsd-threads@freebsd.org Mon Apr 12 06:58:19 2021 Return-Path: Delivered-To: freebsd-threads@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 729555EB97B for ; Mon, 12 Apr 2021 06:58:19 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (mailman.nyi.freebsd.org [IPv6:2610:1c1:1:606c::50:13]) by mx1.freebsd.org (Postfix) with ESMTP id 4FJfhW2fFwz3M1c for ; Mon, 12 Apr 2021 06:58:19 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 589025EB97A; Mon, 12 Apr 2021 06:58:19 +0000 (UTC) Delivered-To: threads@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 571A95EBAF2 for ; Mon, 12 Apr 2021 06:58:19 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4FJfhW1j1Mz3LyY for ; Mon, 12 Apr 2021 06:58:19 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 2D6F912AC7 for ; Mon, 12 Apr 2021 06:58:19 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 13C6wJ71062659 for ; Mon, 12 Apr 2021 06:58:19 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 13C6wJte062658 for threads@FreeBSD.org; Mon, 12 Apr 2021 06:58:19 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: threads@FreeBSD.org Subject: [Bug 254995] pthread_cond_timedwait() returns EDEADLK Date: Mon, 12 Apr 2021 06:58:19 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: threads X-Bugzilla-Version: 12.1-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: nkoch@demig.de X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: threads@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-threads@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Threading on FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 12 Apr 2021 06:58:19 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D254995 Bug ID: 254995 Summary: pthread_cond_timedwait() returns EDEADLK Product: Base System Version: 12.1-RELEASE Hardware: i386 OS: Any Status: New Severity: Affects Some People Priority: --- Component: threads Assignee: threads@FreeBSD.org Reporter: nkoch@demig.de In an embedded environment I sometimes (once per month) see pthread_cond_timedwait() returning EDEADLK, which is not documented anywher= e. Most of the time I expect to see ETIMEDOUT. As my program is forced to core dump when something unexpected happens I can see that there is no 'obvious' program error. I have the same program running under FreeBSD-10.3 and have never seen this before. >From core dump: (gdb) x/20x cond_ 0x6bacd80: 0x00000000 0x00000000 0x00000000 0x00000004 0x6bacd90: 0x00000000 0x00000000 0x00000000 0x00000000 0x6bacda0: 0x7665642f 0x6465642f 0x752f7665 0x34747261 0x6bacdb0: 0x006c7463 0x00000000 0x00000000 0x00000000 0x6bacdc0: 0x00000000 0x06bacdc0 0x00000000 0x00000000 (gdb) x/20x mutex_ 0x6510c80: 0x000187f2 0x00000004 0x00000000 0x00000000 0x6510c90: 0x00000000 0x00000000 0x00000000 0x00000000 0x6510ca0: 0x00000001 0x00000000 0x00000000 0x00000000 0x6510cb0: 0x00000000 0x00000000 0x00000000 0x00000000 0x6510cc0: 0x00000000 0x00000000 0x00000000 0x00000000 --=20 You are receiving this mail because: You are the assignee for the bug.=