From 1b68a8e705126fed8d09edf5fafc8fc279d92359 Mon Sep 17 00:00:00 2001
From: Daniel Verkamp <daniel.verkamp@intel.com>
Date: Wed, 30 Nov 2016 11:16:25 -0700
Subject: [PATCH] config: add option to turn on UBSan

Change-Id: Ifb6b86db530d78bffdc28112f5fe1bdfcba6249c
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
---
 CONFIG            | 3 +++
 mk/spdk.common.mk | 5 +++++
 2 files changed, 8 insertions(+)

diff --git a/CONFIG b/CONFIG
index ef8605525..d87b86935 100644
--- a/CONFIG
+++ b/CONFIG
@@ -43,6 +43,9 @@ CONFIG_COVERAGE?=n
 # Build with Address Sanitizer enabled
 CONFIG_ASAN?=n
 
+# Build with Undefined Behavior Sanitizer enabled
+CONFIG_UBSAN?=n
+
 # Directory that contains the desired SPDK environment library.
 # By default, this is implemented using DPDK.
 CONFIG_ENV?=$(SPDK_ROOT_DIR)/lib/env_dpdk
diff --git a/mk/spdk.common.mk b/mk/spdk.common.mk
index 2abcbf0eb..c43c41554 100644
--- a/mk/spdk.common.mk
+++ b/mk/spdk.common.mk
@@ -100,6 +100,11 @@ COMMON_CFLAGS += -fsanitize=address
 LDFLAGS += -fsanitize=address
 endif
 
+ifeq ($(CONFIG_UBSAN),y)
+COMMON_CFLAGS += -fsanitize=undefined
+LDFLAGS += -fsanitize=undefined
+endif
+
 COMMON_CFLAGS += -pthread
 LDFLAGS += -pthread