From b33c17d37d7e40941775515d05953afa434bec48 Mon Sep 17 00:00:00 2001
From: guenther <guenther@openbsd.org>
Date: Wed, 29 Apr 2015 06:01:37 +0000
Subject: [PATCH] Delete the duplicated sched_{policy,param} members from the
 internal struct pthread and instead use the values from the embedded struct
 pthread_attr. For bonus points, pay attention to the sched_inherit attribute
 and possibly set the values from the parent thread.

Problem noted by natano of bitrig.
---
 lib/librthread/rthread.c       |  9 ++++++++-
 lib/librthread/rthread.h       |  4 +---
 lib/librthread/rthread_sched.c | 20 +++++++++++---------
 3 files changed, 20 insertions(+), 13 deletions(-)

diff --git a/lib/librthread/rthread.c b/lib/librthread/rthread.c
index 688f438a27b..72babbf5032 100644
--- a/lib/librthread/rthread.c
+++ b/lib/librthread/rthread.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: rthread.c,v 1.80 2015/04/07 01:27:07 guenther Exp $ */
+/*	$OpenBSD: rthread.c,v 1.81 2015/04/29 06:01:37 guenther Exp $ */
 /*
  * Copyright (c) 2004,2005 Ted Unangst <tedu@openbsd.org>
  * All Rights Reserved.
@@ -197,6 +197,7 @@ _rthread_init(void)
 
 	_thread_pagesize = (size_t)sysconf(_SC_PAGESIZE);
 	_rthread_attr_default.guard_size = _thread_pagesize;
+	thread->attr = _rthread_attr_default;
 
 	_rthread_initlib();
 
@@ -429,6 +430,12 @@ pthread_create(pthread_t *threadp, const pthread_attr_t *attr,
 	thread->tid = -1;
 
 	thread->attr = attr != NULL ? *(*attr) : _rthread_attr_default;
+	if (thread->attr.sched_inherit == PTHREAD_INHERIT_SCHED) {
+		pthread_t self = pthread_self();
+
+		thread->attr.sched_policy = self->attr.sched_policy;
+		thread->attr.sched_param = self->attr.sched_param;
+	}
 	if (thread->attr.detach_state == PTHREAD_CREATE_DETACHED)
 		thread->flags |= THREAD_DETACHED;
 	thread->flags |= THREAD_CANCEL_ENABLE|THREAD_CANCEL_DEFERRED;
diff --git a/lib/librthread/rthread.h b/lib/librthread/rthread.h
index a777ad8c607..9e087a90595 100644
--- a/lib/librthread/rthread.h
+++ b/lib/librthread/rthread.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: rthread.h,v 1.50 2014/08/31 04:02:08 guenther Exp $ */
+/*	$OpenBSD: rthread.h,v 1.51 2015/04/29 06:01:37 guenther Exp $ */
 /*
  * Copyright (c) 2004,2005 Ted Unangst <tedu@openbsd.org>
  * All Rights Reserved.
@@ -170,9 +170,7 @@ struct pthread {
 	LIST_ENTRY(pthread) threads;
 	TAILQ_ENTRY(pthread) waiting;
 	pthread_cond_t blocking_cond;
-	int sched_policy;
 	struct pthread_attr attr;
-	struct sched_param sched_param;
 	struct rthread_storage *local_storage;
 	struct rthread_cleanup_fn *cleanup_fns;
 	int myerrno;
diff --git a/lib/librthread/rthread_sched.c b/lib/librthread/rthread_sched.c
index 2a63e5d3633..1df1ed19943 100644
--- a/lib/librthread/rthread_sched.c
+++ b/lib/librthread/rthread_sched.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: rthread_sched.c,v 1.12 2012/03/22 15:26:04 kurt Exp $ */
+/*	$OpenBSD: rthread_sched.c,v 1.13 2015/04/29 06:01:37 guenther Exp $ */
 /*
  * Copyright (c) 2004,2005 Ted Unangst <tedu@openbsd.org>
  * All Rights Reserved.
@@ -32,9 +32,9 @@ int
 pthread_getschedparam(pthread_t thread, int *policy,
     struct sched_param *param)
 {
-	*policy = thread->sched_policy;
+	*policy = thread->attr.sched_policy;
 	if (param)
-		*param = thread->sched_param;
+		*param = thread->attr.sched_param;
 
 	return (0);
 }
@@ -47,15 +47,16 @@ pthread_setschedparam(pthread_t thread, int policy,
 	if (policy != SCHED_OTHER && policy != SCHED_FIFO &&
 	    policy != SCHED_RR)
 		return (EINVAL);
-	thread->sched_policy = policy;
+	thread->attr.sched_policy = policy;
 	if (param)
-		thread->sched_param = *param;
+		thread->attr.sched_param = *param;
 
 	return (0);
 }
 
 int
-pthread_attr_getschedparam(const pthread_attr_t *attrp, struct sched_param *param)
+pthread_attr_getschedparam(const pthread_attr_t *attrp,
+    struct sched_param *param)
 {
 	*param = (*attrp)->sched_param;
 
@@ -63,7 +64,8 @@ pthread_attr_getschedparam(const pthread_attr_t *attrp, struct sched_param *para
 }
 
 int
-pthread_attr_setschedparam(pthread_attr_t *attrp, const struct sched_param *param)
+pthread_attr_setschedparam(pthread_attr_t *attrp,
+    const struct sched_param *param)
 {
 	(*attrp)->sched_param = *param;
 
@@ -112,13 +114,13 @@ pthread_attr_setinheritsched(pthread_attr_t *attrp, int inherit)
 int
 pthread_getprio(pthread_t thread)
 {
-	return (thread->sched_param.sched_priority);
+	return (thread->attr.sched_param.sched_priority);
 }
 
 int
 pthread_setprio(pthread_t thread, int priority)
 {
-	thread->sched_param.sched_priority = priority;
+	thread->attr.sched_param.sched_priority = priority;
 
 	return (0);
 }
-- 
2.20.1