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[src/trunk]: src/sys Add clock_getcpuclockid2(2) as well as CLOCK_{PROCESS, TH...
details: https://anonhg.NetBSD.org/src/rev/e56b52a0c3bf
branches: trunk
changeset: 814982:e56b52a0c3bf
user: christos <christos%NetBSD.org@localhost>
date: Sat Apr 23 23:08:26 2016 +0000
description:
Add clock_getcpuclockid2(2) as well as CLOCK_{PROCESS,THREAD}_CPUTIME_ID.
diffstat:
sys/kern/kern_time.c | 35 ++++++++++++++++++++-
sys/kern/subr_time.c | 76 ++++++++++++++++++++++++++++++++++++++++++++++-
sys/kern/syscalls.master | 4 +-
sys/sys/time.h | 4 +-
4 files changed, 113 insertions(+), 6 deletions(-)
diffs (204 lines):
diff -r 08759bce88df -r e56b52a0c3bf sys/kern/kern_time.c
--- a/sys/kern/kern_time.c Sat Apr 23 21:24:31 2016 +0000
+++ b/sys/kern/kern_time.c Sat Apr 23 23:08:26 2016 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: kern_time.c,v 1.185 2016/03/08 05:02:55 christos Exp $ */
+/* $NetBSD: kern_time.c,v 1.186 2016/04/23 23:08:26 christos Exp $ */
/*-
* Copyright (c) 2000, 2004, 2005, 2007, 2008, 2009 The NetBSD Foundation, Inc.
@@ -61,7 +61,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_time.c,v 1.185 2016/03/08 05:02:55 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_time.c,v 1.186 2016/04/23 23:08:26 christos Exp $");
#include <sys/param.h>
#include <sys/resourcevar.h>
@@ -97,6 +97,7 @@
CTASSERT(ITIMER_PROF == CLOCK_PROF);
CTASSERT(ITIMER_MONOTONIC == CLOCK_MONOTONIC);
+
/*
* Initialize timekeeping.
*/
@@ -377,6 +378,36 @@
return error;
}
+int
+sys_clock_getcpuclockid2(struct lwp *l,
+ const struct sys_clock_getcpuclockid2_args *uap,
+ register_t *retval)
+{
+ /* {
+ syscallarg(idtype_t idtype;
+ syscallarg(id_t id);
+ syscallarg(clockid_t *)clock_id;
+ } */
+ pid_t pid;
+ lwpid_t lid;
+ clockid_t clock_id;
+ id_t id = SCARG(uap, id);
+
+ switch (SCARG(uap, idtype)) {
+ case P_PID:
+ pid = id == 0 ? l->l_proc->p_pid : id;
+ clock_id = CLOCK_PROCESS_CPUTIME_ID | pid;
+ break;
+ case P_LWPID:
+ lid = id == 0 ? l->l_lid : id;
+ clock_id = CLOCK_THREAD_CPUTIME_ID | lid;
+ break;
+ default:
+ return EINVAL;
+ }
+ return copyout(&clock_id, SCARG(uap, clock_id), sizeof(clock_id));
+}
+
/* ARGSUSED */
int
sys___gettimeofday50(struct lwp *l, const struct sys___gettimeofday50_args *uap,
diff -r 08759bce88df -r e56b52a0c3bf sys/kern/subr_time.c
--- a/sys/kern/subr_time.c Sat Apr 23 21:24:31 2016 +0000
+++ b/sys/kern/subr_time.c Sat Apr 23 23:08:26 2016 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: subr_time.c,v 1.17 2013/05/22 16:00:52 christos Exp $ */
+/* $NetBSD: subr_time.c,v 1.18 2016/04/23 23:08:26 christos Exp $ */
/*
* Copyright (c) 1982, 1986, 1989, 1993
@@ -33,15 +33,24 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: subr_time.c,v 1.17 2013/05/22 16:00:52 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: subr_time.c,v 1.18 2016/04/23 23:08:26 christos Exp $");
#include <sys/param.h>
#include <sys/kernel.h>
+#include <sys/proc.h>
+#include <sys/kauth.h>
+#include <sys/lwp.h>
#include <sys/timex.h>
#include <sys/time.h>
#include <sys/timetc.h>
#include <sys/intr.h>
+#ifdef DEBUG_STICKS
+#define DPRINTF(a) uprintf a
+#else
+#define DPRINTF(a)
+#endif
+
/*
* Compute number of hz until specified time. Used to compute second
* argument to callout_reset() from an absolute time.
@@ -218,9 +227,72 @@
return tstohz(ts);
}
+static void
+ticks2ts(uint64_t ticks, struct timespec *ts)
+{
+ ts->tv_sec = ticks / hz;
+ uint64_t sticks = ticks - ts->tv_sec * hz;
+ if (sticks > 18446744073709551LL) /* floor(2^64 / 1000) */
+ ts->tv_nsec = sticks / hz * 1000000000LL;
+ else if (sticks > 18446744073709LL) /* floor(2^64 / 1000000) */
+ ts->tv_nsec = sticks * 1000LL / hz * 1000000LL;
+ else
+ ts->tv_nsec = sticks * 1000000000LL / hz;
+ DPRINTF(("%s: %ju/%ju -> %ju.%ju\n", __func__,
+ (uintmax_t)ticks, (uintmax_t)sticks,
+ (uintmax_t)ts->tv_sec, (uintmax_t)ts->tv_nsec));
+}
+
int
clock_gettime1(clockid_t clock_id, struct timespec *ts)
{
+ int error;
+ uint64_t ticks;
+ struct proc *p;
+
+#define CPUCLOCK_ID_MASK (~(CLOCK_THREAD_CPUTIME_ID|CLOCK_PROCESS_CPUTIME_ID))
+ if (clock_id & CLOCK_PROCESS_CPUTIME_ID) {
+ pid_t pid = clock_id & CPUCLOCK_ID_MASK;
+
+ mutex_enter(proc_lock);
+ p = pid == 0 ? curproc : proc_find(pid);
+ if (p == NULL) {
+ mutex_exit(proc_lock);
+ return ESRCH;
+ }
+ ticks = p->p_uticks + p->p_sticks + p->p_iticks;
+ DPRINTF(("%s: u=%ju, s=%ju, i=%ju\n", __func__,
+ (uintmax_t)p->p_uticks, (uintmax_t)p->p_sticks,
+ (uintmax_t)p->p_iticks));
+ mutex_exit(proc_lock);
+
+ // XXX: Perhaps create a special kauth type
+ error = kauth_authorize_process(curlwp->l_cred,
+ KAUTH_PROCESS_PTRACE, p,
+ KAUTH_ARG(KAUTH_REQ_PROCESS_CANSEE_ENTRY), NULL, NULL);
+ if (error)
+ return error;
+ } else if (clock_id & CLOCK_THREAD_CPUTIME_ID) {
+ struct lwp *l;
+ lwpid_t lid = clock_id & CPUCLOCK_ID_MASK;
+ p = curproc;
+ mutex_enter(p->p_lock);
+ l = lid == 0 ? curlwp : lwp_find(p, lid);
+ if (l == NULL) {
+ mutex_exit(p->p_lock);
+ return ESRCH;
+ }
+ ticks = l->l_rticksum + l->l_slpticksum;
+ DPRINTF(("%s: r=%ju, s=%ju\n", __func__,
+ (uintmax_t)l->l_rticksum, (uintmax_t)l->l_slpticksum));
+ mutex_exit(p->p_lock);
+ } else
+ ticks = (uint64_t)-1;
+
+ if (ticks != (uint64_t)-1) {
+ ticks2ts(ticks, ts);
+ return 0;
+ }
switch (clock_id) {
case CLOCK_REALTIME:
diff -r 08759bce88df -r e56b52a0c3bf sys/kern/syscalls.master
--- a/sys/kern/syscalls.master Sat Apr 23 21:24:31 2016 +0000
+++ b/sys/kern/syscalls.master Sat Apr 23 23:08:26 2016 +0000
@@ -1,4 +1,4 @@
- $NetBSD: syscalls.master,v 1.283 2016/04/03 01:00:26 christos Exp $
+ $NetBSD: syscalls.master,v 1.284 2016/04/23 23:08:26 christos Exp $
; @(#)syscalls.master 8.2 (Berkeley) 1/13/94
@@ -983,3 +983,5 @@
481 STD { int|sys||wait6(idtype_t idtype, id_t id, \
int *status, int options, struct wrusage *wru, \
siginfo_t *info); }
+482 STD { int|sys||clock_getcpuclockid2(idtype_t idtype, \
+ id_t id, clockid_t *clock_id); }
diff -r 08759bce88df -r e56b52a0c3bf sys/sys/time.h
--- a/sys/sys/time.h Sat Apr 23 21:24:31 2016 +0000
+++ b/sys/sys/time.h Sat Apr 23 23:08:26 2016 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: time.h,v 1.71 2015/12/24 15:53:06 christos Exp $ */
+/* $NetBSD: time.h,v 1.72 2016/04/23 23:08:26 christos Exp $ */
/*
* Copyright (c) 1982, 1986, 1993
@@ -284,6 +284,8 @@
#define CLOCK_VIRTUAL 1
#define CLOCK_PROF 2
#define CLOCK_MONOTONIC 3
+#define CLOCK_THREAD_CPUTIME_ID 0x80000000
+#define CLOCK_PROCESS_CPUTIME_ID 0x40000000
#if defined(_NETBSD_SOURCE)
#define TIMER_RELTIME 0x0 /* relative timer */
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