kernel/syscall/times.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  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  27 /*        All Rights Reserved   */
  28
  29
  30 #include <sys/param.h>
  31 #include <sys/types.h>
  32 #include <sys/sysmacros.h>
  33 #include <sys/systm.h>
  34 #include <sys/tuneable.h>
  35 #include <sys/errno.h>
  36 #include <sys/proc.h>
  37 #include <sys/time.h>
  38 #include <sys/times.h>
  39 #include <sys/debug.h>
  40 #include <sys/msacct.h>
  41
  42 /*
  43  * Return system and user times.
  44  */
  45
  46 clock_t
  47 times(struct tms *tp)
  48 {
  49         proc_t *p = ttoproc(curthread);
  50         struct tms      p_time;
  51         clock_t ret_lbolt;
  52
  53         mutex_enter(&p->p_lock);
  54         p_time.tms_utime = (clock_t)NSEC_TO_TICK(
  55             mstate_aggr_state(p, LMS_USER));
  56         p_time.tms_stime = (clock_t)NSEC_TO_TICK(
  57             mstate_aggr_state(p, LMS_SYSTEM));
  58         p_time.tms_cutime = p->p_cutime;
  59         p_time.tms_cstime = p->p_cstime;
  60         mutex_exit(&p->p_lock);
  61
  62         if (copyout(&p_time, tp, sizeof (p_time)))
  63                 return (set_errno(EFAULT));
  64
  65         ret_lbolt = ddi_get_lbolt();
  66
  67         return (ret_lbolt == -1 ? 0 : ret_lbolt);
  68 }
  69
  70 #ifdef _SYSCALL32_IMPL
  71
  72 /*
  73  * We deliberately -don't- return EOVERFLOW on type overflow,
  74  * since the 32-bit kernel simply wraps 'em around.
  75  */
  76 clock32_t
  77 times32(struct tms32 *tp)
  78 {
  79         proc_t  *p = ttoproc(curthread);
  80         struct tms32    p_time;
  81         clock32_t       ret_lbolt;
  82
  83         mutex_enter(&p->p_lock);
  84         p_time.tms_utime = (clock32_t)NSEC_TO_TICK(
  85             mstate_aggr_state(p, LMS_USER));
  86         p_time.tms_stime = (clock32_t)NSEC_TO_TICK(
  87             mstate_aggr_state(p, LMS_SYSTEM));
  88         p_time.tms_cutime = (clock32_t)p->p_cutime;
  89         p_time.tms_cstime = (clock32_t)p->p_cstime;
  90         mutex_exit(&p->p_lock);
  91
  92         if (copyout(&p_time, tp, sizeof (p_time)))
  93                 return (set_errno(EFAULT));
  94
  95         ret_lbolt = (clock32_t)ddi_get_lbolt();
  96
  97         return (ret_lbolt == (clock32_t)-1 ? 0 : ret_lbolt);
  98 }
  99
 100 #endif  /* _SYSCALL32_IMPL */