specopen.d   [plain text]

#!/usr/sbin/dtrace -Fs


/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma	ident	"@(#)specopen.d	1.1	06/08/28 SMI"

/*
 * ASSERTION:
 *	Verify doc example 13-1
 *
 * SECTION:
 *	DocExamples/specopen
 */

syscall::open:entry,
syscall::open64:entry
{
	self->spec = speculation();
	speculate(self->spec);

	printf("%s", stringof(copyinstr(arg0)));
}

fbt:::
/self->spec/
{
	speculate(self->spec);
}

syscall::open:return,
syscall::open64:return
/self->spec/
{
	speculate(self->spec);
	trace(errno);
}

syscall::open:return,
syscall::open64:return
/self->spec && errno != 0/
{
	commit(self->spec);
	self->spec = 0;
}

syscall::open:return,
syscall::open64:return
/self->spec && errno == 0/
{
	discard(self->spec);
	self->spec = 0;
}