From owner-freebsd-arm@FreeBSD.ORG Wed Nov 13 13:30:00 2013 Return-Path: Delivered-To: freebsd-arm@smarthost.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id C171A543 for ; Wed, 13 Nov 2013 13:30:00 +0000 (UTC) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:1900:2254:206c::16:87]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id A28E921CF for ; Wed, 13 Nov 2013 13:30:00 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.7/8.14.7) with ESMTP id rADDU0sL081564 for ; Wed, 13 Nov 2013 13:30:00 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.7/8.14.7/Submit) id rADDU0oh081563; Wed, 13 Nov 2013 13:30:00 GMT (envelope-from gnats) Resent-Date: Wed, 13 Nov 2013 13:30:00 GMT Resent-Message-Id: <201311131330.rADDU0oh081563@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-arm@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Howard Su Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 0B6784AE for ; Wed, 13 Nov 2013 13:25:20 +0000 (UTC) Received: from oldred.freebsd.org (oldred.freebsd.org [8.8.178.121]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id EFCE1219C for ; Wed, 13 Nov 2013 13:25:19 +0000 (UTC) Received: from oldred.freebsd.org ([127.0.1.6]) by oldred.freebsd.org (8.14.5/8.14.7) with ESMTP id rADDPJJ9077364 for ; Wed, 13 Nov 2013 13:25:19 GMT (envelope-from nobody@oldred.freebsd.org) Received: (from nobody@localhost) by oldred.freebsd.org (8.14.5/8.14.5/Submit) id rADDPJKL077353; Wed, 13 Nov 2013 13:25:19 GMT (envelope-from nobody) Message-Id: <201311131325.rADDPJKL077353@oldred.freebsd.org> Date: Wed, 13 Nov 2013 13:25:19 GMT From: Howard Su To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-3.1 Subject: arm/183926: Crash when ctrl-c while process is enter X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.16 Precedence: list List-Id: Porting FreeBSD to the StrongARM Processor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 13 Nov 2013 13:30:00 -0000 >Number: 183926 >Category: arm >Synopsis: Crash when ctrl-c while process is enter >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-arm >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed Nov 13 13:30:00 UTC 2013 >Closed-Date: >Last-Modified: >Originator: Howard Su >Release: -Current >Organization: >Environment: FreeBSD beaglebone 11.0-CURRENT FreeBSD 11.0-CURRENT #9 42a79a9(dtrace_arm)-dirty: Tue Nov 12 21:56:17 CST 2013 howardsu@FreeBSD:/usr/home/howardsu/usr/obj/arm.armv6/usr/home/howardsu/usr/freebsd/sys/BEAGLEBONE arm >Description: consistent repro a crash related signal deliver and mutex/cond operation in arm platform. I notice this when I was play with dtrace arm port from gonozo. the _sleep function is a simpler version of dtrace_sleep in libdtrace. In case you need a real case, please refer that file @ cddl/contrib/opensolaris/lib/libdtrace/dt_work.c. >How-To-Repeat: Compile and run the attached C code. Press Ctrl-C when shows "enter". >Fix: Patch attached with submission follows: #include #include #include pthread_cond_t cv; pthread_mutex_t lock; pthread_condattr_t ca; pthread_mutexattr_t ma; int done = 0; void _sleep() { struct timespec tv; clock_gettime(CLOCK_REALTIME,&tv); tv.tv_sec += 1; tv.tv_nsec = 0; (void) pthread_mutex_lock(&lock); (void) pthread_cond_timedwait(&cv, &lock, &tv); (void) pthread_mutex_unlock(&lock); } static void intr(int signo) { done++; } int main() { struct sigaction act; pthread_condattr_init(&ca); pthread_mutexattr_init(&ma); pthread_mutex_init(&lock, &ma); pthread_cond_init(&cv, &ca); (void) sigemptyset(&act.sa_mask); act.sa_flags = 0; act.sa_handler = intr; (void) sigaction(SIGINT, &act, NULL); while(!done) { printf("enter\n"); _sleep(); printf("exit\n"); } printf("done\n"); return 0; } >Release-Note: >Audit-Trail: >Unformatted: