Commit 247724cb authored by Marc-André Lureau's avatar Marc-André Lureau Committed by Paolo Bonzini
Browse files

build-sys: add --enable-sanitizers 



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

Enable it by default when --enable-debug, unless --disable-sanitizers.

Signed-off-by: default avatarMarc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20180116151152.4040-3-marcandre.lureau@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 6c549dc1

configure

+30 −0
Original line number Diff line number Diff line
@@ -342,6 +342,7 @@ rdma="" 
gprof="no"

debug_tcg="no"

debug="no"

sanitizers="no"

fortify_source=""

strip_opt="yes"

tcg_interpreter="no"
@@ -993,6 +994,10 @@ for opt do 
      strip_opt="no"

      fortify_source="no"

  ;;

  --enable-sanitizers) sanitizers="yes"

  ;;

  --disable-sanitizers) sanitizers="no"

  ;;

  --enable-sparse) sparse="yes"

  ;;

  --disable-sparse) sparse="no"
@@ -1474,6 +1479,7 @@ Advanced options (experts only): 
  --firmwarepath=PATH      search PATH for firmware files

  --with-confsuffix=SUFFIX suffix for QEMU data inside datadir/libdir/sysconfdir [$confsuffix]

  --enable-debug           enable common debug build options

  --enable-sanitizers      enable default sanitizers

  --disable-strip          disable stripping binaries

  --disable-werror         disable compilation abort on warning

  --disable-stack-protector disable compiler-provided stack protection
@@ -5200,6 +5206,23 @@ if compile_prog "" "" ; then 
    have_utmpx=yes

fi



##########################################

# checks for sanitizers



write_c_skeleton



have_asan=no

have_ubsan=no



if test "$sanitizers" = "yes" ; then

  if compile_prog "$CPU_CFLAGS -Werror -fsanitize=address" ""; then

      have_asan=yes

  fi

  if compile_prog "$CPU_CFLAGS -Werror -fsanitize=undefined" ""; then

      have_ubsan=yes

  fi

fi



##########################################

# End of CC checks

# After here, no more $cc or $ld runs
@@ -5224,6 +5247,13 @@ else 
    CFLAGS="-O2 $CFLAGS"

fi



if test "$have_asan" = "yes"; then

  CFLAGS="-fsanitize=address $CFLAGS"

fi

if test "$have_ubsan" = "yes"; then

  CFLAGS="-fsanitize=undefined $CFLAGS"

fi



##########################################

# Do we have libnfs

if test "$libnfs" != "no" ; then