kernel/syscall/lwp_info.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, 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 2004 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  28 /*        All Rights Reserved   */
  29
  30
  31 #pragma ident   "%Z%%M% %I%     %E% SMI"
  32
  33 #include <sys/param.h>
  34 #include <sys/types.h>
  35 #include <sys/sysmacros.h>
  36 #include <sys/systm.h>
  37 #include <sys/errno.h>
  38 #include <sys/proc.h>
  39 #include <sys/time.h>
  40 #include <sys/debug.h>
  41 #include <sys/model.h>
  42 #include <sys/msacct.h>
  43
  44 /*
  45  * Get the time accounting information for the calling LWP.
  46  */
  47 int
  48 lwp_info(timestruc_t *tvp)
  49 {
  50         timestruc_t tv[2];
  51         hrtime_t hrutime, hrstime;
  52         klwp_t *lwp = ttolwp(curthread);
  53
  54         hrutime = lwp->lwp_mstate.ms_acct[LMS_USER];
  55         hrstime = lwp->lwp_mstate.ms_acct[LMS_SYSTEM] +
  56             lwp->lwp_mstate.ms_acct[LMS_TRAP];
  57         scalehrtime(&hrutime);
  58         scalehrtime(&hrstime);
  59
  60         hrt2ts(hrutime, &tv[0]);
  61         hrt2ts(hrstime, &tv[1]);
  62
  63         if (get_udatamodel() == DATAMODEL_NATIVE) {
  64                 if (copyout(tv, tvp, sizeof (tv)))
  65                         return (set_errno(EFAULT));
  66         } else {
  67                 timestruc32_t tv32[2];
  68
  69                 if (TIMESPEC_OVERFLOW(&tv[0]) ||
  70                     TIMESPEC_OVERFLOW(&tv[1]))
  71                         return (set_errno(EOVERFLOW));  /* unlikely */
  72
  73                 TIMESPEC_TO_TIMESPEC32(&tv32[0], &tv[0]);
  74                 TIMESPEC_TO_TIMESPEC32(&tv32[1], &tv[1]);
  75
  76                 if (copyout(tv32, tvp, sizeof (tv32)))
  77                         return (set_errno(EFAULT));
  78         }
  79         return (0);
  80 }