libthr: Always use the threaded rtld lock implementation.

The threaded rtld lock implementation is faster even in the single-threaded
case because it postpones signal handlers via THR_CRITICAL_ENTER and
THR_CRITICAL_LEAVE instead of calling sigprocmask(2).

As a result, exception handling becomes faster in single-threaded
applications linked with libthr.

Reviewed by:	kib

2 files changed, 6 insertions, 5 deletions

diff --git a/lib/libthr/thread/thr_init.c b/lib/libthr/thread/thr_init.c
index c29e8c3..937d83f 100644
--- a/lib/libthr/thread/thr_init.c
+++ b/lib/libthr/thread/thr_init.c
@@ -363,6 +363,12 @@ _libpthread_init(struct pthread *curthread)
 		_thr_signal_init();
 		if (_thread_event_mask & TD_CREATE)
 			_thr_report_creation(curthread, curthread);
+		/*
+		 * Always use our rtld lock implementation.
+		 * It is faster because it postpones signal handlers
+		 * instead of calling sigprocmask(2).
+		 */
+		_thr_rtld_init();
 	}
 }
 
diff --git a/lib/libthr/thread/thr_kern.c b/lib/libthr/thread/thr_kern.c
index 1e7cb51..b5a8358 100644
--- a/lib/libthr/thread/thr_kern.c
+++ b/lib/libthr/thread/thr_kern.c
@@ -57,11 +57,6 @@ _thr_setthreaded(int threaded)
 		return (0);
 
 	__isthreaded = threaded;
-	if (threaded != 0) {
-		_thr_rtld_init();
-	} else {
-		_thr_rtld_fini();
-	}
 	return (0);
 }