Alexander Bulekov <[email protected]> 于2021年2月22日周一 上午1:48写道： > > With --enable-fuzzing, QEMU_CFLAGS include -fsanitize=fuzzer-no-link. > This should allow us to build non-fuzzer binaries using objects > instrumented for fuzzing. However, to do that, we also need to link with > -fsanitize=fuzzer-no-link. We were not doing that. > > Reported-by: Li Qiang <[email protected]>, > Signed-off-by: Alexander Bulekov <[email protected]>
Tested-by: Li Qiang <[email protected]> Reviewed-by: Li Qiang <[email protected]> > --- > v2: Fix a mistake in the added QEMU_LDFLAGS line > > configure | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/configure b/configure > index a79b3746d4..19f2b88589 100755 > --- a/configure > +++ b/configure > @@ -6096,7 +6096,17 @@ if test "$fuzzing" = "yes" ; then > # If LIB_FUZZING_ENGINE is set, assume we are running on OSS-Fuzz, and the > # needed CFLAGS have already been provided > if test -z "${LIB_FUZZING_ENGINE+xxx}" ; then > + # Add CFLAGS to tell clang to add fuzzer-related instrumentation to all > the > + # compiled code. > QEMU_CFLAGS="$QEMU_CFLAGS -fsanitize=fuzzer-no-link" > + # To build non-fuzzer binaries with --enable-fuzzing, link everything > with > + # fsanitize=fuzzer-no-link. Otherwise, the linker will be unable to bind > + # the fuzzer-related callbacks added by instrumentation. > + QEMU_LDFLAGS="$QEMU_LDFLAGS -fsanitize=fuzzer-no-link" > + # For the actual fuzzer binaries, we need to link against the libfuzzer > + # library. Provide the flags for doing this in FUZZ_EXE_LDFLAGS. The > meson > + # rule for the fuzzer adds these to the link_args. They need to be > + # configurable, to support OSS-Fuzz > FUZZ_EXE_LDFLAGS="-fsanitize=fuzzer" > else > FUZZ_EXE_LDFLAGS="$LIB_FUZZING_ENGINE" > -- > 2.27.0 > >
