From owner-cvs-src-old@FreeBSD.ORG Wed Feb 11 13:44:35 2009 Return-Path: Delivered-To: cvs-src-old@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id A1CC91065677 for ; Wed, 11 Feb 2009 13:44:35 +0000 (UTC) (envelope-from rwatson@FreeBSD.org) Received: from repoman.freebsd.org (repoman.freebsd.org [IPv6:2001:4f8:fff6::29]) by mx1.freebsd.org (Postfix) with ESMTP id 8E8108FC1C for ; Wed, 11 Feb 2009 13:44:35 +0000 (UTC) (envelope-from rwatson@FreeBSD.org) Received: from repoman.freebsd.org (localhost [127.0.0.1]) by repoman.freebsd.org (8.14.3/8.14.3) with ESMTP id n1BDiZkv033488 for ; Wed, 11 Feb 2009 13:44:35 GMT (envelope-from rwatson@repoman.freebsd.org) Received: (from svn2cvs@localhost) by repoman.freebsd.org (8.14.3/8.14.3/Submit) id n1BDiZSo033487 for cvs-src-old@freebsd.org; Wed, 11 Feb 2009 13:44:35 GMT (envelope-from rwatson@repoman.freebsd.org) Message-Id: <200902111344.n1BDiZSo033487@repoman.freebsd.org> X-Authentication-Warning: repoman.freebsd.org: svn2cvs set sender to rwatson@repoman.freebsd.org using -f From: Robert Watson Date: Wed, 11 Feb 2009 13:44:27 +0000 (UTC) To: cvs-src-old@freebsd.org X-FreeBSD-CVS-Branch: HEAD Subject: cvs commit: src/tools/regression/file/newfileops_on_fork Makefile newfileops_on_fork.c X-BeenThere: cvs-src-old@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: **OBSOLETE** CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Feb 2009 13:44:36 -0000 rwatson 2009-02-11 13:44:27 UTC FreeBSD src repository Added files: tools/regression/file/newfileops_on_fork Makefile newfileops_on_fork.c Log: SVN rev 188483 on 2009-02-11 13:44:27Z by rwatson Add a regresion test to determine whether or not a file descriptor is allocated in a fork(2)-inheritable way at the beginning or end of an accept(2) system call. This test creates a test thread and blocks it in accept(2), then forks a child process which tests to see if the next available file descriptor is defined or not (EBADF vs EINVAL for ftruncate(2)). This detects a regression introduced during the network stack locking work, in which a very narrow race during which fork(2) from one thread during accept(2) in a second thread lead to an extra inherited file descriptor turned into a very wide race ensuring that a descriptor was leaked into the child even though it hadn't been returned. PR: kern/130348 Revision Changes Path 1.1 +8 -0 src/tools/regression/file/newfileops_on_fork/Makefile (new) 1.1 +121 -0 src/tools/regression/file/newfileops_on_fork/newfileops_on_fork.c (new)