Add DTrace support for OS X, Solaris, and Linux (via SystemTap), 2/4

Add D scripts in the `lib/dtrace/examples` directory.

Add SystemTap README and sample scripts, contributed by
Andreas Schultz <[email protected]>.

1 files changed, 45 insertions, 0 deletions

diff --git a/lib/dtrace/examples/process-scheduling.systemtap b/lib/dtrace/examples/process-scheduling.systemtap
new file mode 100644
index 0000000000..c8cee60a07
--- /dev/null
+++ b/lib/dtrace/examples/process-scheduling.systemtap
@@ -0,0 +1,45 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Scott Lystig Fritchie and Andreas Schultz, 2011. All Rights Reserved.
+ *
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * %CopyrightEnd%
+ */
+/*
+ * Note: This file assumes that you're using the non-SMP-enabled Erlang
+ *       virtual machine, "beam".  The SMP-enabled VM is called "beam.smp".
+ *       Note that other variations of the virtual machine also have
+ *       different names, e.g. the debug build of the SMP-enabled VM
+ *       is "beam.debug.smp".
+ *
+ *       To use a different virtual machine, replace each instance of
+ *       "beam" with "beam.smp" or the VM name appropriate to your
+ *       environment.
+ */
+
+probe process("beam").mark("process-scheduled")
+{
+    printf("  Schedule pid %s mfa %s\n", user_string($arg1), user_string($arg2));
+}
+
+probe process("beam").mark("process-unscheduled")
+{
+    printf("Unschedule pid %s\n", user_string($arg1));
+}
+
+probe process("beam").mark("process-hibernate")
+{
+    printf("  Hibernate pid %s resume mfa %s\n",
+     user_string($arg1), user_string($arg2));
+}