[Qemu-devel] [PATCH v3 07/18] build-sys: add some sanitizers when --enable-debug if possible

["Marc-André Lureau" <marcandre.lureau@redhat.com>]

Enable ASAN/UBSan by default if the compiler supports it.

Typical slowdown introduced by AddressSanitizer is 2x.
UBSan shouldn't have much impact on runtime cost.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 configure | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/configure b/configure
index 3953859314..de1477c93a 100755
--- a/configure
+++ b/configure
@@ -5161,6 +5161,13 @@ if test "$gcov" = "yes" ; then
 elif test "$fortify_source" = "yes" ; then
   CFLAGS="-O2 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 $CFLAGS"
 elif test "$debug" = "yes"; then
+  write_c_skeleton;
+  if compile_prog "-fsanitize=address" ""; then
+      CFLAGS="-fsanitize=address $CFLAGS"
+  fi
+  if compile_prog "-fsanitize=undefined" ""; then
+      CFLAGS="-fsanitize=undefined $CFLAGS"
+  fi
   if compile_prog "-Og" ""; then
       CFLAGS="-Og $CFLAGS"
   elif compile_prog "-O1" ""; then
-- 
2.15.1.355.g36791d7216