Add support for the _POSIX_CPUTIME and _POSIX_THREAD_CPUTIME options,

including CLOCK_{PROCESS,THREAD}_CPUTIME_ID constants and
{clock,pthread}_getcpuclockid() functions.

Worked out at t2k13 with help from tedu@ and matthew@ and testing by aja@
ok matthew@

12 files changed, 236 insertions, 25 deletions

diff --git a/lib/libc/gen/Makefile.inc b/lib/libc/gen/Makefile.inc
index e3c040e576a..a6b77b0154a 100644
--- a/lib/libc/gen/Makefile.inc
+++ b/lib/libc/gen/Makefile.inc
@@ -1,10 +1,11 @@
-#	$OpenBSD: Makefile.inc,v 1.61 2013/05/31 20:59:23 ajacoutot Exp $
+#	$OpenBSD: Makefile.inc,v 1.62 2013/06/17 19:11:54 guenther Exp $
 
 # gen sources
 .PATH: ${LIBCSRCDIR}/arch/${MACHINE_CPU}/gen ${LIBCSRCDIR}/gen
 
 SRCS+=  alarm.c assert.c auth_subr.c authenticate.c \
-        basename.c clock.c closedir.c confstr.c ctermid.c ctype_.c \
+        basename.c clock.c clock_getcpuclockid.c \
+        closedir.c confstr.c ctermid.c ctype_.c \
         daemon.c devname.c dirfd.c dirname.c disklabel.c elf_hash.c err.c \
         errx.c errlist.c errno.c exec.c \
         fdatasync.c fnmatch.c fpclassify.c frexp.c \
@@ -36,7 +37,8 @@ SRCS+=	_sys_errlist.c _sys_nerr.c _sys_siglist.c
 
 .include "${LIBCSRCDIR}/arch/${MACHINE_CPU}/gen/Makefile.inc"
 
-MAN+=	alarm.3 auth_subr.3 authenticate.3 basename.3 clock.3 confstr.3 \
+MAN+=	alarm.3 auth_subr.3 authenticate.3 basename.3 clock.3 \
+	clock_getcpuclockid.3 confstr.3 \
 	ctermid.3 ctype.3 daemon.3 devname.3 directory.3 dirname.3 err.3 \
 	exec.3 fabs.3 fnmatch.3 fpclassify.3 fpgetmask.3 frexp.3 ftok.3 fts.3 \
 	ftw.3 getbsize.3 getcap.3 getcwd.3 getdomainname.3 getdiskbyname.3 \
diff --git a/lib/libc/gen/clock_getcpuclockid.3 b/lib/libc/gen/clock_getcpuclockid.3
new file mode 100644
index 00000000000..181a5929df3
--- /dev/null
+++ b/lib/libc/gen/clock_getcpuclockid.3
@@ -0,0 +1,65 @@
+.\"	$OpenBSD: clock_getcpuclockid.3,v 1.1 2013/06/17 19:11:54 guenther Exp $
+.\"
+.\" Copyright (c) 2013 Philip Guenther <guenther@openbsd.org>
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd $Mdocdate: June 17 2013 $
+.Dt CLOCK_GETCPUCLOCKID 3
+.Os
+.Sh NAME
+.Nm clock_getcpuclockid
+.Nd get a clock measuring process CPU time
+.Sh SYNOPSIS
+.Fd #include <time.h>
+.Ft int
+.Fn clock_getcpuclockid "pid_t pid" "clockid_t *clock_id"
+.Sh DESCRIPTION
+The
+.Fn clock_getcpuclockid
+function allows the calling process to get a
+.Vt clockid_t
+value that measures the time spent by CPUs running in user or kernel mode
+on behalf of the process specified by
+.Fa pid .
+If
+.Fa pid
+is zero, then a clock for the calling process will be returned.
+.Sh RETURN VALUES
+If successful,
+.Fn clock_getcpuclockid
+will return zero.
+Otherwise an error number will be returned to indicate the error.
+.Sh ERRORS
+.Fn clock_getcpuclockid
+will fail if:
+.Bl -tag -width Er
+.It Bq Er EPERM
+.Fa pid
+is neither zero nor the PID of the calling process.
+.El
+.Sh SEE ALSO
+.Xr clock_gettime 2 ,
+.Xr pthread_getcpuclockid 3
+.Sh STANDARDS
+The
+.Fn clock_getcpuclockid
+function conforms to
+.St -p1003.1-2008 .
+.Sh HISTORY
+The
+.Fn clock_getcpuclockid
+function first appeared in
+.St -p1003.1d-99
+and has been available since
+.Ox 5.4 .
diff --git a/lib/libc/gen/clock_getcpuclockid.c b/lib/libc/gen/clock_getcpuclockid.c
new file mode 100644
index 00000000000..f0c18aac1f5
--- /dev/null
+++ b/lib/libc/gen/clock_getcpuclockid.c
@@ -0,0 +1,31 @@
+/*	$OpenBSD: clock_getcpuclockid.c,v 1.1 2013/06/17 19:11:54 guenther Exp $ */
+/*
+ * Copyright (c) 2013 Philip Guenther <guenther@openbsd.org>
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <time.h>
+#include <unistd.h>
+#include <errno.h>
+
+int
+clock_getcpuclockid(pid_t pid, clockid_t *clock_id)
+{
+	if (pid != 0 && pid != getpid())
+		return (EPERM);
+
+	*clock_id = CLOCK_PROCESS_CPUTIME_ID;
+	return (0);
+}
diff --git a/lib/libc/shlib_version b/lib/libc/shlib_version
index 3f763170cb9..7d7d8121727 100644
--- a/lib/libc/shlib_version
+++ b/lib/libc/shlib_version
@@ -1,4 +1,4 @@
 major=68
-minor=3
+minor=4
 # note: If changes were made to include/thread_private.h or if system
 # calls were added/changed then librthread/shlib_version also be updated.
diff --git a/lib/libc/sys/clock_gettime.2 b/lib/libc/sys/clock_gettime.2
index 7d4adedb3c2..e7b36d7121f 100644
--- a/lib/libc/sys/clock_gettime.2
+++ b/lib/libc/sys/clock_gettime.2
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: clock_gettime.2,v 1.20 2013/03/31 08:34:27 guenther Exp $
+.\"	$OpenBSD: clock_gettime.2,v 1.21 2013/06/17 19:11:54 guenther Exp $
 .\"
 .\" Copyright (c) 1980, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -27,7 +27,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: March 31 2013 $
+.Dd $Mdocdate: June 17 2013 $
 .Dt CLOCK_GETTIME 2
 .Os
 .Sh NAME
@@ -48,22 +48,33 @@ The
 .Fn clock_gettime
 and
 .Fn clock_settime
+functions
 allow the calling process to retrieve or set the value used by a clock
 which is specified by
 .Fa clock_id .
 .Pp
 .Fa clock_id
-can be one of four values:
-.Dv CLOCK_REALTIME
-for time that increments as
-a wall clock should,
-.Dv CLOCK_VIRTUAL
-for time that increments only when
-the CPU is running in user mode on behalf of the calling process,
-.Dv CLOCK_PROF
-for time that increments when the CPU is running in user or kernel mode, or
-.Dv CLOCK_MONOTONIC
-for time that increments at a steady rate (monotonically).
+can be a value from
+.Xr clock_getcpuclockid 3
+or
+.Xr pthread_getcpuclockid 3
+or one of five predefined values:
+.Bl -tag -width CLOCK_MONOTONIC
+.It Dv CLOCK_REALTIME
+time that increments as a wall clock should
+.It Dv CLOCK_VIRTUAL
+time that increments only when
+the CPU is running in user mode on behalf of the calling process
+.It Dv CLOCK_PROCESS_CPUTIME_ID
+time that increments when the CPU is running in user or kernel mode
+on behalf of the calling process
+.It Dv CLOCK_THREAD_CPUTIME_ID
+time that increments when the CPU is running in user or kernel mode
+on behalf of the calling thread
+.It Dv CLOCK_MONOTONIC
+time that increments as a wall clock should but whose absolute value
+is meaningless and cannot jump, providing accurate interval measurement
+.El
 .Pp
 The structure pointed to by
 .Fa tp
@@ -77,7 +88,9 @@ struct timespec {
 };
 .Ed
 .Pp
-Only the superuser may set the time of day.
+Only the
+.Dv CLOCK_REALTIME
+clock can be set, and only the superuser may do so.
 If the system securelevel is greater than 1 (see
 .Xr init 8 ) ,
 the time may only be advanced.
@@ -129,7 +142,9 @@ or a value outside the range of the specified clock.
 .Sh SEE ALSO
 .Xr date 1 ,
 .Xr adjtime 2 ,
-.Xr ctime 3
+.Xr clock_getcpuclockid 3 ,
+.Xr ctime 3 ,
+.Xr pthread_getcpuclockid 3
 .Sh STANDARDS
 The
 .Fn clock_getres ,
diff --git a/lib/libpthread/include/pthread.h b/lib/libpthread/include/pthread.h
index de6a8096483..7329429d750 100644
--- a/lib/libpthread/include/pthread.h
+++ b/lib/libpthread/include/pthread.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pthread.h,v 1.39 2012/12/05 23:20:05 deraadt Exp $	*/
+/*	$OpenBSD: pthread.h,v 1.40 2013/06/17 19:11:54 guenther Exp $	*/
 
 /*
  * Copyright (c) 1993, 1994 by Chris Provenzano, proven@mit.edu
@@ -309,6 +309,10 @@ int		pthread_spin_destroy(pthread_spinlock_t *);
 int		pthread_spin_trylock(pthread_spinlock_t *);
 int		pthread_spin_lock(pthread_spinlock_t *);
 int		pthread_spin_unlock(pthread_spinlock_t *);
+
+#if __POSIX_VISIBLE >= 200112
+int		pthread_getcpuclockid(pthread_t, clockid_t *);
+#endif
 __END_DECLS
 
 #endif /* _PTHREAD_H_ */
diff --git a/lib/libpthread/man/Makefile.inc b/lib/libpthread/man/Makefile.inc
index 80f85126f51..7fd3ba1dcd6 100644
--- a/lib/libpthread/man/Makefile.inc
+++ b/lib/libpthread/man/Makefile.inc
@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile.inc,v 1.33 2012/05/03 09:07:17 pirofti Exp $
+# $OpenBSD: Makefile.inc,v 1.34 2013/06/17 19:11:54 guenther Exp $
 # $FreeBSD: Makefile.inc,v 1.6 1999/08/28 00:03:02 peter Exp $
 
 # POSIX thread man files
@@ -32,6 +32,7 @@ MAN+=	\
 	pthread_equal.3 \
 	pthread_exit.3 \
 	pthread_getconcurrency.3 \
+	pthread_getcpuclockid.3 \
 	pthread_getspecific.3 \
 	pthread_join.3 \
 	pthread_key_create.3 \
diff --git a/lib/libpthread/man/pthread_getcpuclockid.3 b/lib/libpthread/man/pthread_getcpuclockid.3
new file mode 100644
index 00000000000..b01ff49afda
--- /dev/null
+++ b/lib/libpthread/man/pthread_getcpuclockid.3
@@ -0,0 +1,61 @@
+.\"	$OpenBSD: pthread_getcpuclockid.3,v 1.1 2013/06/17 19:11:54 guenther Exp $
+.\"
+.\" Copyright (c) 2013 Philip Guenther <guenther@openbsd.org>
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd $Mdocdate: June 17 2013 $
+.Dt PTHREAD_GETCPUCLOCKID 3
+.Os
+.Sh NAME
+.Nm pthread_getcpuclockid
+.Nd get a clock measuring thread CPU time
+.Sh SYNOPSIS
+.Fd #include <pthread.h>
+.Ft int
+.Fn pthread_getcpuclockid "pthread_t thread" "clockid_t *clock_id"
+.Sh DESCRIPTION
+The
+.Fn pthread_getcpuclockid
+function allows the calling thread to get a
+.Vt clockid_t
+value that measures the time spent by CPUs running in user or kernel mode
+on behalf of the thread specified by
+.Fa thread .
+.Sh RETURN VALUES
+If successful,
+.Fn pthread_getcpuclockid
+will return zero.
+Otherwise an error number will be returned to indicate the error.
+.Sh ERRORS
+.Fn pthread_getcpuclockid
+will fail if:
+.Bl -tag -width Er
+.It Bq Er ESRCH
+thread is an invalid thread ID.
+.El
+.Sh SEE ALSO
+.Xr clock_gettime 2 ,
+.Xr clock_getcpuclockid 3
+.Sh STANDARDS
+The
+.Fn pthread_getcpuclockid
+function conforms to
+.St -p1003.1-2008 .
+.Sh HISTORY
+The
+.Fn pthread_getcpuclockid
+function first appeared in
+.St -p1003.1d-99
+and has been available since
+.Ox 5.4 .
diff --git a/lib/libpthread/man/pthreads.3 b/lib/libpthread/man/pthreads.3
index 9f76594d4ad..3843b8a1f3a 100644
--- a/lib/libpthread/man/pthreads.3
+++ b/lib/libpthread/man/pthreads.3
@@ -1,6 +1,6 @@
-.\" $OpenBSD: pthreads.3,v 1.38 2012/09/02 13:29:29 jmc Exp $
+.\" $OpenBSD: pthreads.3,v 1.39 2013/06/17 19:11:54 guenther Exp $
 .\" David Leonard <d@openbsd.org>, 1998. Public domain.
-.Dd $Mdocdate: September 2 2012 $
+.Dd $Mdocdate: June 17 2013 $
 .Dt PTHREADS 3
 .Os
 .Sh NAME
@@ -269,6 +269,8 @@ Set cancelability state.
 Set cancelability state.
 .It Fn pthread_sigmask
 Examine/change a thread's signal mask.
+.It Fn pthread_getcpuclockid
+Get a CPU time clock for a thread.
 .El
 .Ss Thread stacks
 Each thread has a different stack, whether it be provided by a
@@ -419,6 +421,7 @@ with larger numbers generating more verbose output.
 .Xr pthread_detach 3 ,
 .Xr pthread_equal 3 ,
 .Xr pthread_exit 3 ,
+.Xr pthread_getcpuclockid 3,
 .Xr pthread_getspecific 3 ,
 .Xr pthread_join 3 ,
 .Xr pthread_key_create 3 ,
diff --git a/lib/librthread/Makefile b/lib/librthread/Makefile
index 9f9d6264e5c..1c82668a5ea 100644
--- a/lib/librthread/Makefile
+++ b/lib/librthread/Makefile
@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile,v 1.34 2012/11/22 19:10:27 miod Exp $
+#	$OpenBSD: Makefile,v 1.35 2013/06/17 19:11:54 guenther Exp $
 
 # For ``COMPILER_VERSION'' and ``ELF_TOOLCHAIN''
 .include <bsd.own.mk>
@@ -27,6 +27,7 @@ SRCS=	rthread.c \
 	rthread_debug.c \
 	rthread_file.c \
 	rthread_fork.c \
+	rthread_getcpuclockid.c \
 	rthread_libc.c \
 	rthread_mutex_prio.c \
 	rthread_mutexattr.c \
diff --git a/lib/librthread/rthread_getcpuclockid.c b/lib/librthread/rthread_getcpuclockid.c
new file mode 100644
index 00000000000..52d50c6ad68
--- /dev/null
+++ b/lib/librthread/rthread_getcpuclockid.c
@@ -0,0 +1,28 @@
+/*	$OpenBSD: rthread_getcpuclockid.c,v 1.1 2013/06/17 19:11:54 guenther Exp $ */
+/*
+ * Copyright (c) 2013 Philip Guenther <guenther@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <time.h>
+#include <pthread.h>
+
+#include "rthread.h"
+
+int
+pthread_getcpuclockid(pthread_t thread, clockid_t *clock_id)
+{
+	*clock_id = __CLOCK_ENCODE(CLOCK_THREAD_CPUTIME_ID, thread->tid);
+	return (0);
+}
diff --git a/lib/librthread/shlib_version b/lib/librthread/shlib_version
index 49b346400a8..8f4855b2ca5 100644
--- a/lib/librthread/shlib_version
+++ b/lib/librthread/shlib_version
@@ -1,2 +1,2 @@
 major=17
-minor=2
+minor=3