OpenSolaris Launch

1 files changed, 60 insertions, 0 deletions

diff --git a/usr/src/uts/common/os/lockstat_subr.c b/usr/src/uts/common/os/lockstat_subr.c
new file mode 100644
index 0000000000..fb3b92c5f8
--- /dev/null
+++ b/usr/src/uts/common/os/lockstat_subr.c
@@ -0,0 +1,60 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 1997-2003 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/types.h>
+#include <sys/inttypes.h>
+#include <sys/time.h>
+#include <sys/thread.h>
+#include <sys/cpuvar.h>
+#include <sys/cyclic.h>
+#include <sys/lockstat.h>
+#include <sys/spl.h>
+
+/*
+ * Resident support for the lockstat driver.
+ */
+
+dtrace_id_t lockstat_probemap[LS_NPROBES];
+void (*lockstat_probe)(dtrace_id_t, uintptr_t, uintptr_t,
+    uintptr_t, uintptr_t, uintptr_t);
+
+int
+lockstat_active_threads(void)
+{
+	kthread_t *tp;
+	int active = 0;
+
+	mutex_enter(&pidlock);
+	tp = curthread;
+	do {
+		if (tp->t_lockstat)
+			active++;
+	} while ((tp = tp->t_next) != curthread);
+	mutex_exit(&pidlock);
+	return (active);
+}