sync with FreeBSD (rwlock, gc thread, man pages)

add (broken) mips md stuff
fix some const warnings
add sigaltstack() stub
another hash at getting shlib auto-init to work (mips/elf and i386/a.out)

1 files changed, 10 insertions, 5 deletions

diff --git a/lib/libc_r/uthread/uthread_find_thread.c b/lib/libc_r/uthread/uthread_find_thread.c
index 99e302306d2..e4a59a0d83f 100644
--- a/lib/libc_r/uthread/uthread_find_thread.c
+++ b/lib/libc_r/uthread/uthread_find_thread.c
@@ -76,8 +76,12 @@ _find_dead_thread(pthread_t pthread)
 		/* Invalid thread: */
 		return(EINVAL);
 
-	/* Lock the dead thread list: */
-	_lock_dead_thread_list();
+	/*
+	 * Lock the garbage collector mutex to ensure that the garbage
+	 * collector is not using the dead thread list.
+	 */
+	if (pthread_mutex_lock(&_gc_mutex) != 0)
+		PANIC("Cannot lock gc mutex");
 
 	/* Point to the first thread in the list: */
 	pthread1 = _thread_dead;
@@ -85,11 +89,12 @@ _find_dead_thread(pthread_t pthread)
 	/* Search for the thread to join to: */
 	while (pthread1 != NULL && pthread1 != pthread) {
 		/* Point to the next thread: */
-		pthread1 = pthread1->nxt;
+		pthread1 = pthread1->nxt_dead;
 	}
 
-	/* Unlock the dead thread list: */
-	_unlock_dead_thread_list();
+	/* Unlock the garbage collector mutex: */
+	if (pthread_mutex_unlock(&_gc_mutex) != 0)
+		PANIC("Cannot lock gc mutex");
 
 	/* Return zero if the thread exists: */
 	return ((pthread1 != NULL) ? 0:ESRCH);