From 72760c0c2b5b41b465faa0cb33800b5156a979ea Mon Sep 17 00:00:00 2001
From: Michal Nowak <mnowak@isc.org>
Date: Wed, 8 Nov 2023 19:21:30 +0100
Subject: [PATCH] Add support for recording named runtime with rr

The traces of the named process are stored in the directory
$system_test/nsX/named-Y/.

(cherry picked from commit e088e8a992008ba5e0dc1c540f808a03e69cd619)
---
 bin/tests/system/README   | 8 ++++++++
 bin/tests/system/start.pl | 3 +++
 2 files changed, 11 insertions(+)

diff --git a/bin/tests/system/README b/bin/tests/system/README
index 58e6048ae0..cb9f71b237 100644
--- a/bin/tests/system/README
+++ b/bin/tests/system/README
@@ -710,6 +710,14 @@ or SEQUENTIAL variables.
 need to edit multiple files to add a test.)
 
 
+rr
+---
+
+When running system tests, named can be run under the rr tool. rr records a
+trace to the $system_test/nsX/named-Y/ directory, which can be later used to
+replay named. To enable this, execute start.pl with the USE_RR environment
+variable set.
+
 Developer Notes for pytest runner
 ===
 
diff --git a/bin/tests/system/start.pl b/bin/tests/system/start.pl
index c0163a2a23..904aa9b1e0 100755
--- a/bin/tests/system/start.pl
+++ b/bin/tests/system/start.pl
@@ -232,6 +232,9 @@ sub construct_ns_command {
 
 	if ($taskset) {
 		$command = "taskset $taskset $NAMED ";
+	} elsif ($ENV{'USE_RR'}) {
+		$ENV{'_RR_TRACE_DIR'} = ".";
+		$command = "rr record --chaos $NAMED ";
 	} else {
 		$command = "$NAMED ";
 	}