1 files changed, 87 insertions, 0 deletions
diff --git a/cddl/contrib/dtracetoolkit/Java/j_flow.d b/cddl/contrib/dtracetoolkit/Java/j_flow.d
new file mode 100755
index 000000000000..e98c06784a4a
--- /dev/null
+++ b/cddl/contrib/dtracetoolkit/Java/j_flow.d
@@ -0,0 +1,87 @@
+#!/usr/sbin/dtrace -Zs
+/*
+ * j_flow.d - snoop Java execution showing method flow using DTrace.
+ *            Written for the Java hotspot DTrace provider.
+ *
+ * $Id: j_flow.d 38 2007-09-16 08:17:41Z brendan $
+ *
+ * This traces activity from all Java processes on the system with hotspot
+ * provider support (1.6.0) and the flag "+ExtendedDTraceProbes". eg,
+ * java -XX:+ExtendedDTraceProbes classfile
+ *
+ * USAGE: j_flow.d		# hit Ctrl-C to end
+ *
+ * This watches Java method entries and returns, and indents child
+ * method calls.
+ *
+ * FIELDS:
+ *		C		CPU-id
+ *		TIME(us)	Time since boot, us
+ *		PID		Process ID
+ *		CLASS.METHOD	Java class and method name
+ *
+ * LEGEND:
+ *		->		method entry
+ *		<-		method return
+ *
+ * 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.
+ * Changes in TID will appear to shuffle output, as we change from one thread
+ * depth to the next. See Docs/Notes/ALLjavaflow.txt for additional notes.
+ *
+ * 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.
+ */
+
+/* increasing bufsize can reduce drops */
+#pragma D option bufsize=16m
+#pragma D option quiet
+#pragma D option switchrate=10
+
+self int depth[int];
+
+dtrace:::BEGIN
+{
+	printf("%3s %6s %-16s -- %s\n", "C", "PID", "TIME(us)", "CLASS.METHOD");
+}
+
+hotspot*:::method-entry
+{
+	this->class = (char *)copyin(arg1, arg2 + 1);
+	this->class[arg2] = '\0';
+	this->method = (char *)copyin(arg3, arg4 + 1);
+	this->method[arg4] = '\0';
+
+	printf("%3d %6d %-16d %*s-> %s.%s\n", cpu, pid, timestamp / 1000,
+	    self->depth[arg0] * 2, "", stringof(this->class),
+	    stringof(this->method));
+	self->depth[arg0]++;
+}
+
+hotspot*:::method-return
+{
+	this->class = (char *)copyin(arg1, arg2 + 1);
+	this->class[arg2] = '\0';
+	this->method = (char *)copyin(arg3, arg4 + 1);
+	this->method[arg4] = '\0';
+
+	self->depth[arg0] -= self->depth[arg0] > 0 ? 1 : 0;
+	printf("%3d %6d %-16d %*s<- %s.%s\n", cpu, pid, timestamp / 1000,
+	    self->depth[arg0] * 2, "", stringof(this->class),
+	    stringof(this->method));
+}