usr/src/cmd/dtrace/test/tst/common/safety/tst.rw.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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #pragma D option bufsize=1000
  30 #pragma D option bufpolicy=ring
  31 #pragma D option statusrate=10ms
  32
  33 fbt:::
  34 {
  35         on = (timestamp / 1000000000) & 1;
  36 }
  37
  38 fbt:::
  39 /on/
  40 {
  41         @[rw_read_held((krwlock_t *)&`clock)] = count();
  42         @[rw_read_held((krwlock_t *)rand())] = count();
  43 }
  44
  45 fbt:::
  46 /on/
  47 {
  48         @[rw_write_held((krwlock_t *)&`clock)] = count();
  49         @[rw_write_held((krwlock_t *)rand())] = count();
  50 }
  51
  52 fbt:::
  53 /on/
  54 {
  55         @[rw_iswriter((krwlock_t *)&`clock)] = count();
  56         @[rw_iswriter((krwlock_t *)rand())] = count();
  57 }
  58
  59 tick-1sec
  60 /n++ == 20/
  61 {
  62         exit(0);
  63 }
  64