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authorMarc-André Lureau <marcandre.lureau@redhat.com>2018-01-16 16:11:52 +0100
committerPaolo Bonzini <pbonzini@redhat.com>2018-02-07 14:09:24 +0100
commitd83414e1fd1941ca8228b5cf6a06697bd1ff7f83 (patch)
tree98c3ab60afc07fc2d5abed2ef243e774d0c1e2b1 /configure
parent247724cb302af5d70c8853154b640dfabf2bbb56 (diff)
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ucontext: annotate coroutine stack for ASAN
It helps ASAN to detect more leaks on coroutine stacks, and to get rid of some extra warnings. Before: tests/test-coroutine -p /basic/lifecycle /basic/lifecycle: ==20781==WARNING: ASan doesn't fully support makecontext/swapcontext functions and may produce false positives in some cases! ==20781==WARNING: ASan is ignoring requested __asan_handle_no_return: stack top: 0x7ffcb184d000; bottom 0x7ff6c4cfd000; size: 0x0005ecb50000 (25446121472) False positive error reports may follow For details see https://github.com/google/sanitizers/issues/189 OK After: tests/test-coroutine -p /basic/lifecycle /basic/lifecycle: ==21110==WARNING: ASan doesn't fully support makecontext/swapcontext functions and may produce false positives in some cases! OK A similar work would need to be done for sigaltstack & windows fibers to have similar coverage. Since ucontext is preferred, I didn't bother checking the other coroutine implementations for now. Update travis to fix the build with ASAN annotations. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20180116151152.4040-4-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'configure')
-rwxr-xr-xconfigure30
1 files changed, 30 insertions, 0 deletions
diff --git a/configure b/configure
index 35147ad..529aad5 100755
--- a/configure
+++ b/configure
@@ -5213,6 +5213,8 @@ write_c_skeleton
have_asan=no
have_ubsan=no
+have_asan_iface_h=no
+have_asan_iface_fiber=no
if test "$sanitizers" = "yes" ; then
if compile_prog "$CPU_CFLAGS -Werror -fsanitize=address" ""; then
@@ -5221,12 +5223,29 @@ if test "$sanitizers" = "yes" ; then
if compile_prog "$CPU_CFLAGS -Werror -fsanitize=undefined" ""; then
have_ubsan=yes
fi
+
+ if check_include "sanitizer/asan_interface.h" ; then
+ have_asan_iface_h=yes
+ fi
+
+ cat > $TMPC << EOF
+#include <sanitizer/asan_interface.h>
+int main(void) {
+ __sanitizer_start_switch_fiber(0, 0, 0);
+ return 0;
+}
+EOF
+ if compile_prog "$CPU_CFLAGS -Werror -fsanitize=address" "" ; then
+ have_asan_iface_fiber=yes
+ fi
fi
##########################################
# End of CC checks
# After here, no more $cc or $ld runs
+write_c_skeleton
+
if test "$gcov" = "yes" ; then
CFLAGS="-fprofile-arcs -ftest-coverage -g $CFLAGS"
LDFLAGS="-fprofile-arcs -ftest-coverage $LDFLAGS"
@@ -5249,6 +5268,13 @@ fi
if test "$have_asan" = "yes"; then
CFLAGS="-fsanitize=address $CFLAGS"
+ if test "$have_asan_iface_h" = "no" ; then
+ echo "ASAN build enabled, but ASAN header missing." \
+ "Without code annotation, the report may be inferior."
+ elif test "$have_asan_iface_fiber" = "no" ; then
+ echo "ASAN build enabled, but ASAN header is too old." \
+ "Without code annotation, the report may be inferior."
+ fi
fi
if test "$have_ubsan" = "yes"; then
CFLAGS="-fsanitize=undefined $CFLAGS"
@@ -6237,6 +6263,10 @@ if test "$valgrind_h" = "yes" ; then
echo "CONFIG_VALGRIND_H=y" >> $config_host_mak
fi
+if test "$have_asan_iface_fiber" = "yes" ; then
+ echo "CONFIG_ASAN_IFACE_FIBER=y" >> $config_host_mak
+fi
+
if test "$has_environ" = "yes" ; then
echo "CONFIG_HAS_ENVIRON=y" >> $config_host_mak
fi