xref: /titanic_51/usr/src/cmd/dtrace/demo/struct/ksyms.d (revision 82629e3015252bf18319ba3815c773df23e21436)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*
28  * When our strings(1) invocation starts a read(2), set a watched flag on
29  * the current thread.  When the read(2) finishes, clear the watched flag.
30  */
31 syscall::read:entry
32 /curpsinfo->pr_psargs == "strings -a /dev/ksyms"/
33 {
34 	printf("read %u bytes to user address %x\n", arg2, arg1);
35 	self->watched = 1;
36 }
37 
38 syscall::read:return
39 /self->watched/
40 {
41 	self->watched = 0;
42 }
43 
44 /*
45  * Instrument uiomove(9F).  The prototype for this function is as follows:
46  * int uiomove(caddr_t addr, size_t nbytes, enum uio_rw rwflag, uio_t *uio);
47  */
48 fbt::uiomove:entry
49 /self->watched/
50 {
51 	this->iov = args[3]->uio_iov;
52 
53 	printf("uiomove %u bytes to %p in pid %d\n",
54 	    this->iov->iov_len, this->iov->iov_base, pid);
55 }
56