usr/src/cmd/dtrace/test/tst/common/ustack/tst.spin.c

   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 #include <unistd.h>
  30
  31 volatile long long count = 0;
  32
  33 int
  34 baz(int a)
  35 {
  36         (void) getpid();
  37         while (count != -1) {
  38                 count++;
  39                 a++;
  40         }
  41
  42         return (a + 1);
  43 }
  44
  45 int
  46 bar(int a)
  47 {
  48         return (baz(a + 1) - 1);
  49 }
  50
  51 int
  52 foo(int a, int b)
  53 {
  54         return (bar(a) - b);
  55 }
  56
  57 int
  58 main(int argc, char **argv)
  59 {
  60         return (foo(argc, (int)argv) == 0);
  61 }