1 files changed, 72 insertions, 0 deletions
diff --git a/Ruby/rb_flow.d b/Ruby/rb_flow.d
new file mode 100755
index 000000000000..e4ff76001534
--- /dev/null
+++ b/Ruby/rb_flow.d
@@ -0,0 +1,72 @@
+#!/usr/sbin/dtrace -Zs
+/*
+ * rb_flow.d - snoop Ruby execution showing method flow using DTrace.
+ *             Written for the Ruby DTrace provider.
+ *
+ * $Id: rb_flow.d 41 2007-09-17 02:20:10Z brendan $
+ *
+ * This traces activity from all Ruby programs on the system that are
+ * running with Ruby provider support.
+ *
+ * USAGE: rb_flow.d 		# hit Ctrl-C to end
+ *
+ * FIELDS:
+ *		C		CPU-id
+ *		TIME(us)	Time since boot, us
+ *		FILE		Filename that this method belongs to
+ *		CLASS::METHOD	Ruby classname and method
+ *
+ * LEGEND:
+ *		->		method entry
+ *		<-		method return
+ *
+ * Filename and method names are printed if available.
+ *
+ * WARNING: Watch the first column carefully, it prints the CPU-id. If it
+ * changes, then it is very likely that the output has been shuffled.
+ *
+ * COPYRIGHT: Copyright (c) 2007 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
+ *
+ * 09-Sep-2007	Brendan Gregg	Created this.
+ */
+
+#pragma D option quiet
+#pragma D option switchrate=10
+
+self int depth;
+
+dtrace:::BEGIN
+{
+	printf("%3s %-16s %-22s -- %s\n", "C", "TIME(us)", "FILE",
+	    "CLASS::METHOD");
+}
+
+ruby*:::function-entry
+{
+	printf("%3d %-16d %-22s %*s-> %s::%s\n", cpu, timestamp / 1000, 
+	    basename(copyinstr(arg2)), self->depth * 2, "", copyinstr(arg0),
+	    copyinstr(arg1));
+	self->depth++;
+}
+
+ruby*:::function-return
+{
+	self->depth -= self->depth > 0 ? 1 : 0;
+	printf("%3d %-16d %-22s %*s<- %s::%s\n", cpu, timestamp / 1000,
+	    basename(copyinstr(arg2)), self->depth * 2, "", copyinstr(arg0),
+	    copyinstr(arg1));
+}