From owner-svn-src-head@FreeBSD.ORG Sat May 31 14:58:54 2014 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 31E813E3; Sat, 31 May 2014 14:58:54 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 129432FDE; Sat, 31 May 2014 14:58:54 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.8/8.14.8) with ESMTP id s4VEwrcP058830; Sat, 31 May 2014 14:58:53 GMT (envelope-from dchagin@svn.freebsd.org) Received: (from dchagin@localhost) by svn.freebsd.org (8.14.8/8.14.8/Submit) id s4VEwrWY058828; Sat, 31 May 2014 14:58:53 GMT (envelope-from dchagin@svn.freebsd.org) Message-Id: <201405311458.s4VEwrWY058828@svn.freebsd.org> From: Dmitry Chagin Date: Sat, 31 May 2014 14:58:53 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r266924 - head/sys/compat/linux X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 31 May 2014 14:58:54 -0000 Author: dchagin Date: Sat May 31 14:58:53 2014 New Revision: 266924 URL: http://svnweb.freebsd.org/changeset/base/266924 Log: Glibc was switched to the FUTEX_WAIT_BITSET op and CLOCK_REALTIME flag has been added instead of FUTEX_WAIT to replace the FUTEX_WAIT logic which needs to do gettimeofday() calls before the futex syscall to convert the absolute timeout to a relative timeout. Before this the CLOCK_MONOTONIC used by the FUTEX_WAIT_BITSET op. When the FUTEX_CLOCK_REALTIME is specified the timeout is an absolute time, not a relative time. Rework futex_wait to handle this. On the side fix the futex leak in error case and remove useless parentheses. Properly calculate the timeout for the CLOCK_MONOTONIC case. MFC after: 3 days Modified: head/sys/compat/linux/linux_futex.c Modified: head/sys/compat/linux/linux_futex.c ============================================================================== --- head/sys/compat/linux/linux_futex.c Sat May 31 14:38:05 2014 (r266923) +++ head/sys/compat/linux/linux_futex.c Sat May 31 14:58:53 2014 (r266924) @@ -128,9 +128,7 @@ LIN_SDT_PROBE_DEFINE3(futex, futex_reque "struct waiting_proc *", "uint32_t"); LIN_SDT_PROBE_DEFINE1(futex, futex_requeue, return, "int"); LIN_SDT_PROBE_DEFINE4(futex, futex_wait, entry, "struct futex *", - "struct waiting_proc **", "struct l_timespec *", "uint32_t"); -LIN_SDT_PROBE_DEFINE1(futex, futex_wait, copyin_error, "int"); -LIN_SDT_PROBE_DEFINE1(futex, futex_wait, itimerfix_error, "int"); + "struct waiting_proc **", "int", "uint32_t"); LIN_SDT_PROBE_DEFINE1(futex, futex_wait, sleep_error, "int"); LIN_SDT_PROBE_DEFINE1(futex, futex_wait, return, "int"); LIN_SDT_PROBE_DEFINE3(futex, futex_atomic_op, entry, "struct thread *", @@ -144,6 +142,7 @@ LIN_SDT_PROBE_DEFINE1(futex, futex_atomi LIN_SDT_PROBE_DEFINE2(futex, linux_sys_futex, entry, "struct thread *", "struct linux_sys_futex_args *"); LIN_SDT_PROBE_DEFINE0(futex, linux_sys_futex, unimplemented_clockswitch); +LIN_SDT_PROBE_DEFINE1(futex, linux_sys_futex, itimerfix_error, "int"); LIN_SDT_PROBE_DEFINE1(futex, linux_sys_futex, copyin_error, "int"); LIN_SDT_PROBE_DEFINE0(futex, linux_sys_futex, invalid_cmp_requeue_use); LIN_SDT_PROBE_DEFINE3(futex, linux_sys_futex, debug_wait, "uint32_t *", @@ -554,15 +553,12 @@ futex_requeue(struct futex *f, int n, st } static int -futex_wait(struct futex *f, struct waiting_proc *wp, struct l_timespec *ts, +futex_wait(struct futex *f, struct waiting_proc *wp, int timeout_hz, uint32_t bitset) { - struct l_timespec timeout; - struct timeval tv; - int timeout_hz; int error; - LIN_SDT_PROBE4(futex, futex_wait, entry, f, wp, ts, bitset); + LIN_SDT_PROBE4(futex, futex_wait, entry, f, wp, timeout_hz, bitset); if (bitset == 0) { LIN_SDT_PROBE1(futex, futex_wait, return, EINVAL); @@ -570,30 +566,9 @@ futex_wait(struct futex *f, struct waiti } f->f_bitset = bitset; - - if (ts != NULL) { - error = copyin(ts, &timeout, sizeof(timeout)); - if (error) { - LIN_SDT_PROBE1(futex, futex_wait, copyin_error, error); - LIN_SDT_PROBE1(futex, futex_wait, return, error); - return (error); - } - TIMESPEC_TO_TIMEVAL(&tv, &timeout); - error = itimerfix(&tv); - if (error) { - LIN_SDT_PROBE1(futex, futex_wait, itimerfix_error, - error); - LIN_SDT_PROBE1(futex, futex_wait, return, error); - return (error); - } - timeout_hz = tvtohz(&tv); - } else - timeout_hz = 0; - error = futex_sleep(f, wp, timeout_hz); - if (error) { + if (error) LIN_SDT_PROBE1(futex, futex_wait, sleep_error, error); - } if (error == EWOULDBLOCK) error = ETIMEDOUT; @@ -683,6 +658,9 @@ linux_sys_futex(struct thread *td, struc struct linux_emuldata *em; struct waiting_proc *wp; struct futex *f, *f2; + struct l_timespec timeout; + struct timeval utv, ctv; + int timeout_hz; int error; uint32_t flags, val; @@ -756,7 +734,38 @@ linux_sys_futex(struct thread *td, struc return (EWOULDBLOCK); } - error = futex_wait(f, wp, args->timeout, args->val3); + if (args->timeout != NULL) { + error = copyin(args->timeout, &timeout, sizeof(timeout)); + if (error) { + LIN_SDT_PROBE1(futex, linux_sys_futex, copyin_error, + error); + LIN_SDT_PROBE1(futex, linux_sys_futex, return, error); + futex_put(f, wp); + return (error); + } + TIMESPEC_TO_TIMEVAL(&utv, &timeout); + error = itimerfix(&utv); + if (error) { + LIN_SDT_PROBE1(futex, linux_sys_futex, itimerfix_error, + error); + LIN_SDT_PROBE1(futex, linux_sys_futex, return, error); + futex_put(f, wp); + return (error); + } + if (clockrt) { + microtime(&ctv); + timevalsub(&utv, &ctv); + } else if (args->op == LINUX_FUTEX_WAIT_BITSET) { + microuptime(&ctv); + timevalsub(&utv, &ctv); + } + if (utv.tv_sec < 0) + timevalclear(&utv); + timeout_hz = tvtohz(&utv); + } else + timeout_hz = 0; + + error = futex_wait(f, wp, timeout_hz, args->val3); break; case LINUX_FUTEX_WAKE: