From 5486fdbb77a4921c407e511dcd6c5fbd8cf5caa3 Mon Sep 17 00:00:00 2001
From: mpi <mpi@openbsd.org>
Date: Wed, 1 Sep 2021 13:22:36 +0000
Subject: [PATCH] Rergression for printing a @map after calling clear().

Adapted from a test case generated by AFL++.

ok jasper@
---
 regress/usr.sbin/btrace/Makefile                | 4 ++--
 regress/usr.sbin/btrace/read-map-after-clear.bt | 7 +++++++
 regress/usr.sbin/btrace/read-map-after-clear.ok | 1 +
 3 files changed, 10 insertions(+), 2 deletions(-)
 create mode 100644 regress/usr.sbin/btrace/read-map-after-clear.bt
 create mode 100644 regress/usr.sbin/btrace/read-map-after-clear.ok

diff --git a/regress/usr.sbin/btrace/Makefile b/regress/usr.sbin/btrace/Makefile
index 145512cf65a..0e2aba1398b 100644
--- a/regress/usr.sbin/btrace/Makefile
+++ b/regress/usr.sbin/btrace/Makefile
@@ -1,11 +1,11 @@
-# $OpenBSD: Makefile,v 1.11 2021/08/31 12:51:56 mpi Exp $
+# $OpenBSD: Makefile,v 1.12 2021/09/01 13:22:36 mpi Exp $
 
 BTRACE?=		 /usr/sbin/btrace
 
 # scripts that don't need /dev/dt
 BT_LANG_SCRIPTS=	arithm beginend boolean comments delete exit if map \
 			map-unnamed maxoperand min+max+sum multismts nsecs+var \
-			precedence print
+			precedence print read-map-after-clear
 
 BT_KERN_SCRIPTS=
 
diff --git a/regress/usr.sbin/btrace/read-map-after-clear.bt b/regress/usr.sbin/btrace/read-map-after-clear.bt
new file mode 100644
index 00000000000..73266910f6c
--- /dev/null
+++ b/regress/usr.sbin/btrace/read-map-after-clear.bt
@@ -0,0 +1,7 @@
+BEGIN
+{
+        @map[7] = 2;
+        clear(@map);
+        printf("=> Print after clear should not crash %d:\n", @map);
+}
+
diff --git a/regress/usr.sbin/btrace/read-map-after-clear.ok b/regress/usr.sbin/btrace/read-map-after-clear.ok
new file mode 100644
index 00000000000..f1ede837bf9
--- /dev/null
+++ b/regress/usr.sbin/btrace/read-map-after-clear.ok
@@ -0,0 +1 @@
+=> Print after clear should not crash 0:
-- 
2.20.1