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

[Philippe Mathieu-Daudé]

On 01/04/2018 01:05 PM, Marc-André Lureau wrote:
> 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 <address@hidden>

Reviewed-by: Philippe Mathieu-Daudé <address@hidden>

docker-debian-amd64 with QEMU_CONFIGURE_OPTS=--enable-debug:
Tested-by: Philippe Mathieu-Daudé <address@hidden>

> ---
>  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
>