From owner-svn-src-stable@freebsd.org Fri Dec 8 18:04:45 2017 Return-Path: Delivered-To: svn-src-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 146ABE8A0BC; Fri, 8 Dec 2017 18:04:45 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::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 D1FA27CD34; Fri, 8 Dec 2017 18:04:44 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id vB8I4hhU047621; Fri, 8 Dec 2017 18:04:43 GMT (envelope-from markj@FreeBSD.org) Received: (from markj@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id vB8I4hKK047620; Fri, 8 Dec 2017 18:04:43 GMT (envelope-from markj@FreeBSD.org) Message-Id: <201712081804.vB8I4hKK047620@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: markj set sender to markj@FreeBSD.org using -f From: Mark Johnston Date: Fri, 8 Dec 2017 18:04:43 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r326701 - stable/11/sys/cddl/contrib/opensolaris/uts/common/dtrace X-SVN-Group: stable-11 X-SVN-Commit-Author: markj X-SVN-Commit-Paths: stable/11/sys/cddl/contrib/opensolaris/uts/common/dtrace X-SVN-Commit-Revision: 326701 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 08 Dec 2017 18:04:45 -0000 Author: markj Date: Fri Dec 8 18:04:43 2017 New Revision: 326701 URL: https://svnweb.freebsd.org/changeset/base/326701 Log: MFC r326134: Duplicate helpers after disabling inherited tracepoints during a fork. Modified: stable/11/sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c ============================================================================== --- stable/11/sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c Fri Dec 8 17:52:53 2017 (r326700) +++ stable/11/sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c Fri Dec 8 18:04:43 2017 (r326701) @@ -600,8 +600,8 @@ fasttrap_fork(proc_t *p, proc_t *cp) pid_t ppid = p->p_pid; int i; -#ifdef illumos ASSERT(curproc == p); +#ifdef illumos ASSERT(p->p_proc_flag & P_PR_LOCK); #else PROC_LOCK_ASSERT(p, MA_OWNED); @@ -609,26 +609,15 @@ fasttrap_fork(proc_t *p, proc_t *cp) #ifdef illumos ASSERT(p->p_dtrace_count > 0); #else - if (p->p_dtrace_helpers) { - /* - * dtrace_helpers_duplicate() allocates memory. - */ - _PHOLD(cp); - PROC_UNLOCK(p); - PROC_UNLOCK(cp); - dtrace_helpers_duplicate(p, cp); - PROC_LOCK(cp); - PROC_LOCK(p); - _PRELE(cp); - } /* * This check is purposely here instead of in kern_fork.c because, * for legal resons, we cannot include the dtrace_cddl.h header * inside kern_fork.c and insert if-clause there. */ - if (p->p_dtrace_count == 0) + if (p->p_dtrace_count == 0 && p->p_dtrace_helpers == NULL) return; #endif + ASSERT(cp->p_dtrace_count == 0); /* @@ -657,6 +646,8 @@ fasttrap_fork(proc_t *p, proc_t *cp) _PHOLD(cp); PROC_UNLOCK(cp); PROC_UNLOCK(p); + if (p->p_dtrace_count == 0) + goto dup_helpers; #endif /* @@ -710,6 +701,9 @@ fasttrap_fork(proc_t *p, proc_t *cp) mutex_enter(&cp->p_lock); sprunlock(cp); #else +dup_helpers: + if (p->p_dtrace_helpers != NULL) + dtrace_helpers_duplicate(p, cp); PROC_LOCK(p); PROC_LOCK(cp); _PRELE(cp);