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diff --git a/cddl/contrib/dtracetoolkit/Proc/mmapfiles.d b/cddl/contrib/dtracetoolkit/Proc/mmapfiles.d
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+++ b/cddl/contrib/dtracetoolkit/Proc/mmapfiles.d
@@ -0,0 +1,62 @@
+#!/usr/sbin/dtrace -s
+/*
+ * mmapfiles.d - mmap'd files by process.
+ * Written using DTrace (Solaris 10 3/05).
+ *
+ * $Id: mmapfiles.d 14 2007-09-11 08:03:35Z brendan $
+ *
+ * USAGE: mmapfiles.d # hit Ctrl-C to end sample
+ *
+ * FIELDS:
+ * MMAPS number of mmaps
+ * CMD process name
+ * PATHNAME pathname of mmap'd file
+ *
+ * COPYRIGHT: Copyright (c) 2005, 2006 Brendan Gregg.
+ *
+ * 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 Docs/cddl1.txt
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * CDDL HEADER END
+ *
+ * 18-Oct-2005 Brendan Gregg Created this.
+ * 20-Apr-2006 " " Last update.
+ */
+
+#pragma D option quiet
+
+dtrace:::BEGIN
+{
+ printf("Tracing... Hit Ctrl-C to end.\n");
+}
+
+syscall::mmap:entry
+/(int)arg4 > 0/
+{
+ /*
+ * Fetch filename
+ */
+ this->filep = curthread->t_procp->p_user.u_finfo.fi_list[arg4].uf_file;
+ this->vnodep = this->filep != 0 ? this->filep->f_vnode : 0;
+ self->vpath = this->vnodep ? (this->vnodep->v_path != 0 ?
+ cleanpath(this->vnodep->v_path) : "<unknown>") : "<unknown>";
+
+ /* Store Details */
+ @hits[execname, self->vpath] = count();
+}
+
+dtrace:::END
+{
+ /* Print Details */
+ printf("%5s %-16s %s\n", "MMAPS", "CMD", "PATHNAME");
+ printa("%@5d %-16s %s\n", @hits);
+}
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