17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * CDDL HEADER START
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
57c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
67c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
77c478bd9Sstevel@tonic-gate  * with the License.
87c478bd9Sstevel@tonic-gate  *
97c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
107c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
117c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
127c478bd9Sstevel@tonic-gate  * and limitations under the License.
137c478bd9Sstevel@tonic-gate  *
147c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
157c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
167c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
177c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
187c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
197c478bd9Sstevel@tonic-gate  *
207c478bd9Sstevel@tonic-gate  * CDDL HEADER END
217c478bd9Sstevel@tonic-gate  */
227c478bd9Sstevel@tonic-gate /*
237c478bd9Sstevel@tonic-gate  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
247c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
257c478bd9Sstevel@tonic-gate  */
267c478bd9Sstevel@tonic-gate 
277c478bd9Sstevel@tonic-gate #!/usr/sbin/dtrace -Fs
287c478bd9Sstevel@tonic-gate 
297c478bd9Sstevel@tonic-gate syscall::open:entry,
307c478bd9Sstevel@tonic-gate syscall::open64:entry
317c478bd9Sstevel@tonic-gate {
327c478bd9Sstevel@tonic-gate 	/*
337c478bd9Sstevel@tonic-gate 	 * The call to speculation() creates a new speculation.  If this fails,
34*bbf21555SRichard Lowe 	 * dtrace(8) will generate an error message indicating the reason for
357c478bd9Sstevel@tonic-gate 	 * the failed speculation(), but subsequent speculative tracing will be
367c478bd9Sstevel@tonic-gate 	 * silently discarded.
377c478bd9Sstevel@tonic-gate 	 */
387c478bd9Sstevel@tonic-gate 	self->spec = speculation();
397c478bd9Sstevel@tonic-gate 	speculate(self->spec);
407c478bd9Sstevel@tonic-gate 
417c478bd9Sstevel@tonic-gate 	/*
427c478bd9Sstevel@tonic-gate 	 * Because this printf() follows the speculate(), it is being
437c478bd9Sstevel@tonic-gate 	 * speculatively traced; it will only appear in the data buffer if the
447c478bd9Sstevel@tonic-gate 	 * speculation is subsequently commited.
457c478bd9Sstevel@tonic-gate 	 */
467c478bd9Sstevel@tonic-gate 	printf("%s", stringof(copyinstr(arg0)));
477c478bd9Sstevel@tonic-gate }
487c478bd9Sstevel@tonic-gate 
497c478bd9Sstevel@tonic-gate fbt:::
507c478bd9Sstevel@tonic-gate /self->spec/
517c478bd9Sstevel@tonic-gate {
527c478bd9Sstevel@tonic-gate 	/*
537c478bd9Sstevel@tonic-gate 	 * A speculate() with no other actions speculates the default action:
547c478bd9Sstevel@tonic-gate 	 * tracing the EPID.
557c478bd9Sstevel@tonic-gate 	 */
567c478bd9Sstevel@tonic-gate 	speculate(self->spec);
577c478bd9Sstevel@tonic-gate }
587c478bd9Sstevel@tonic-gate 
597c478bd9Sstevel@tonic-gate syscall::open:return,
607c478bd9Sstevel@tonic-gate syscall::open64:return
617c478bd9Sstevel@tonic-gate /self->spec/
627c478bd9Sstevel@tonic-gate {
637c478bd9Sstevel@tonic-gate 	/*
647c478bd9Sstevel@tonic-gate 	 * To balance the output with the -F option, we want to be sure that
657c478bd9Sstevel@tonic-gate 	 * every entry has a matching return.  Because we speculated the
667c478bd9Sstevel@tonic-gate 	 * open entry above, we want to also speculate the open return.
677c478bd9Sstevel@tonic-gate 	 * This is also a convenient time to trace the errno value.
687c478bd9Sstevel@tonic-gate 	 */
697c478bd9Sstevel@tonic-gate 	speculate(self->spec);
707c478bd9Sstevel@tonic-gate 	trace(errno);
717c478bd9Sstevel@tonic-gate }
727c478bd9Sstevel@tonic-gate 
737c478bd9Sstevel@tonic-gate syscall::open:return,
747c478bd9Sstevel@tonic-gate syscall::open64:return
757c478bd9Sstevel@tonic-gate /self->spec && errno != 0/
767c478bd9Sstevel@tonic-gate {
777c478bd9Sstevel@tonic-gate 	/*
787c478bd9Sstevel@tonic-gate 	 * If errno is non-zero, we want to commit the speculation.
797c478bd9Sstevel@tonic-gate 	 */
807c478bd9Sstevel@tonic-gate 	commit(self->spec);
817c478bd9Sstevel@tonic-gate 	self->spec = 0;
827c478bd9Sstevel@tonic-gate }
837c478bd9Sstevel@tonic-gate 
847c478bd9Sstevel@tonic-gate syscall::open:return,
857c478bd9Sstevel@tonic-gate syscall::open64:return
867c478bd9Sstevel@tonic-gate /self->spec && errno == 0/
877c478bd9Sstevel@tonic-gate {
887c478bd9Sstevel@tonic-gate 	/*
897c478bd9Sstevel@tonic-gate 	 * If errno is not set, we discard the speculation.
907c478bd9Sstevel@tonic-gate 	 */
917c478bd9Sstevel@tonic-gate 	discard(self->spec);
927c478bd9Sstevel@tonic-gate 	self->spec = 0;
937c478bd9Sstevel@tonic-gate }
94