patch/ubsan/ubsan_test.patch

From 080e004b7ba917bd88d9f9c51d077e32a959d8fa Mon Sep 17 00:00:00 2001
From: Zelalem <zelalem.aweke@arm.com>
Date: Fri, 6 Dec 2019 10:29:13 -0600
Subject: [PATCH] Add UBSAN test patch

Change-Id: Ib2c78d9da0f214957dcad0d1d9a89089c10c9b48
---
 bl31/bl31_main.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/bl31/bl31_main.c b/bl31/bl31_main.c
index 92a2027dd..46cbed65e 100644
--- a/bl31/bl31_main.c
+++ b/bl31/bl31_main.c
@@ -85,6 +85,19 @@ void bl31_setup(u_register_t arg0, u_register_t arg1, u_register_t arg2,
 #endif /* CTX_INCLUDE_PAUTH_REGS */
 }
 
+/*
+* UBSAN test function. This is used to test whether CI handles
+* undefined behaviour errors correctly.
+*/
+#include <limits.h>
+
+static int ubsan_test_add_overflow(void)
+{
+        static int32_t val = INT_MAX;
+        val += 0x1;
+        return val;
+}
+
 /*******************************************************************************
  * BL31 is responsible for setting up the runtime services for the primary cpu
  * before passing control to the bootloader or an Operating System. This
@@ -147,6 +160,10 @@ void bl31_main(void)
 	 * from BL31
 	 */
 	bl31_plat_runtime_setup();
+
+	/* Run UBSAN Test */
+        INFO("BL31: Running UBSAN test\n");
+        ubsan_test_add_overflow();
 }
 
 /*******************************************************************************
-- 
2.17.1