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[Qemu-devel] [PULL 19/47] build-sys: add --enable-sanitizers
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PULL 19/47] build-sys: add --enable-sanitizers |
Date: |
Wed, 7 Feb 2018 16:25:15 +0100 |
From: Marc-André Lureau <address@hidden>
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: Marc-André Lureau <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Paolo Bonzini <address@hidden>
---
configure | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/configure b/configure
index bdbd097..35147ad 100755
--- a/configure
+++ b/configure
@@ -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 [$confsuffix]
--enable-debug enable common debug build options
+ --enable-sanitizers enable default sanitizers
--disable-strip disable stripping binaries
--disable-werror disable compilation abort on warning
--disable-stack-protector disable compiler-provided stack protection
@@ -5201,6 +5207,23 @@ if compile_prog "" "" ; then
fi
##########################################
+# checks for sanitizers
+
+write_c_skeleton
+
+have_asan=no
+have_ubsan=no
+
+if test "$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
--
1.8.3.1