usr/src/cmd/dtrace/demo/struct/ksyms.d

   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 }