1 files changed, 78 insertions, 0 deletions
diff --git a/Java/j_profile.d b/Java/j_profile.d
new file mode 100755
index 000000000000..4ff009e91068
--- /dev/null
+++ b/Java/j_profile.d
@@ -0,0 +1,78 @@
+#!/usr/sbin/dtrace -CZs
+/*
+ * j_profile.d - sample stack traces with Java translations using DTrace.
+ *
+ * USAGE: j_profile.d { -p PID | -c cmd }	# hit Ctrl-C to end
+ * $Id: j_profile.d 19 2007-09-12 07:47:59Z brendan $
+ *
+ *
+ * This samples stack traces for the process specified. This stack trace
+ * will cross the JVM and system libraries, and insert translations for Java
+ * stack frames where appropriate. This is best explained with an example
+ * stack frame output,
+ *
+ *            Func_loop.func_c()V
+ *            Func_loop.func_b()V
+ *            Func_loop.func_a()V
+ *            Func_loop.main([Ljava/lang/String;)V
+ *            StubRoutines (1)
+ *            libjvm.so`__1cJJavaCallsLcall_helper6FpnJJavaValue_pnMmethodHan
+ *            libjvm.so`__1cCosUos_exception_wrapper6FpFpnJJavaValue_pnMmetho
+ *            libjvm.so`__1cJJavaCallsEcall6FpnJJavaValue_nMmethodHandle_pnRJ
+ *            libjvm.so`__1cRjni_invoke_static6FpnHJNIEnv__pnJJavaValue_pnI_j
+ *            libjvm.so`jni_CallStaticVoidMethod+0x15d
+ *            java`JavaMain+0xd30
+ *            libc.so.1`_thr_setup+0x52
+ *            libc.so.1`_lwp_start
+ *            101
+ *
+ * The lines at the top are Java frames, followed by the JVM (libjvm.so).
+ * The JVM symbols may be translated by passing the output through c++filt.
+ *
+ * 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 jstackstrsize=1024
+
+/*
+ * Tunables
+ */
+#define DEPTH	10		/* stack depth, frames */
+#define RATE	101		/* sampling rate, Hertz */
+#define TOP	25		/* number of stacks to output */
+
+dtrace:::BEGIN
+{
+	printf("Sampling %d-level stacks at %d Hertz... Hit Ctrl-C to end.\n",
+	    DEPTH, RATE);
+}
+
+profile-RATE
+/pid == $target/
+{
+	@stacks[jstack(DEPTH)] = count();
+}
+
+dtrace:::END
+{
+	trunc(@stacks, TOP);
+	printf("Top %d most frequently sampled stacks,\n", TOP);
+	printa(@stacks);
+}