fuzz: add oss-fuzz build-script
It is neater to keep this in the QEMU repo, since any change that requires an update to the oss-fuzz build configuration, can make the necessary changes in the same series. Suggested-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Alexander Bulekov <alxndr@bu.edu> Reviewed-by: Darren Kenny <darren.kenny@oracle.com> Message-Id: <20200612055145.12101-1-alxndr@bu.edu> Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Alexander Bulekov
Thomas Huth
parent
8efebd4e01
commit
211635b3a2
|
|
@ -2339,6 +2339,7 @@ R: Bandan Das <bsd@redhat.com>
|
|||
R: Stefan Hajnoczi <stefanha@redhat.com>
|
||||
S: Maintained
|
||||
F: tests/qtest/fuzz/
|
||||
F: scripts/oss-fuzz/
|
||||
|
||||
Register API
|
||||
M: Alistair Francis <alistair@alistair23.me>
|
||||
|
|
|
|||
|
|
@ -0,0 +1,105 @@
|
|||
#!/bin/sh -e
|
||||
#
|
||||
# OSS-Fuzz build script. See:
|
||||
# https://google.github.io/oss-fuzz/getting-started/new-project-guide/#buildsh
|
||||
#
|
||||
# The file is consumed by:
|
||||
# https://github.com/google/oss-fuzz/blob/master/projects/qemu/Dockerfiles
|
||||
#
|
||||
# This code is licensed under the GPL version 2 or later. See
|
||||
# the COPYING file in the top-level directory.
|
||||
#
|
||||
|
||||
# build project
|
||||
# e.g.
|
||||
# ./autogen.sh
|
||||
# ./configure
|
||||
# make -j$(nproc) all
|
||||
|
||||
# build fuzzers
|
||||
# e.g.
|
||||
# $CXX $CXXFLAGS -std=c++11 -Iinclude \
|
||||
# /path/to/name_of_fuzzer.cc -o $OUT/name_of_fuzzer \
|
||||
# $LIB_FUZZING_ENGINE /path/to/library.a
|
||||
|
||||
fatal () {
|
||||
echo "Error : ${*}, exiting."
|
||||
exit 1
|
||||
}
|
||||
|
||||
OSS_FUZZ_BUILD_DIR="./build-oss-fuzz/"
|
||||
|
||||
# There seems to be a bug in clang-11 (used for builds on oss-fuzz) :
|
||||
# accel/tcg/cputlb.o: In function `load_memop':
|
||||
# accel/tcg/cputlb.c:1505: undefined reference to `qemu_build_not_reached'
|
||||
#
|
||||
# When building with optimization, the compiler is expected to prove that the
|
||||
# statement cannot be reached, and remove it. For some reason clang-11 doesn't
|
||||
# remove it, resulting in an unresolved reference to qemu_build_not_reached
|
||||
# Undefine the __OPTIMIZE__ macro which compiler.h relies on to choose whether
|
||||
# to " #define qemu_build_not_reached() g_assert_not_reached() "
|
||||
EXTRA_CFLAGS="$CFLAGS -U __OPTIMIZE__"
|
||||
|
||||
if ! { [ -e "./COPYING" ] &&
|
||||
[ -e "./MAINTAINERS" ] &&
|
||||
[ -e "./Makefile" ] &&
|
||||
[ -e "./docs" ] &&
|
||||
[ -e "./VERSION" ] &&
|
||||
[ -e "./linux-user" ] &&
|
||||
[ -e "./softmmu" ];} ; then
|
||||
fatal "Please run the script from the top of the QEMU tree"
|
||||
fi
|
||||
|
||||
mkdir -p $OSS_FUZZ_BUILD_DIR || fatal "mkdir $OSS_FUZZ_BUILD_DIR failed"
|
||||
cd $OSS_FUZZ_BUILD_DIR || fatal "cd $OSS_FUZZ_BUILD_DIR failed"
|
||||
|
||||
|
||||
if [ -z ${LIB_FUZZING_ENGINE+x} ]; then
|
||||
LIB_FUZZING_ENGINE="-fsanitize=fuzzer"
|
||||
fi
|
||||
|
||||
if [ -z ${OUT+x} ]; then
|
||||
DEST_DIR=$(realpath "./DEST_DIR")
|
||||
else
|
||||
DEST_DIR=$OUT
|
||||
fi
|
||||
|
||||
mkdir -p "$DEST_DIR/lib/" # Copy the shared libraries here
|
||||
|
||||
# Build once to get the list of dynamic lib paths, and copy them over
|
||||
../configure --disable-werror --cc="$CC" --cxx="$CXX" \
|
||||
--extra-cflags="$EXTRA_CFLAGS"
|
||||
|
||||
if ! make CONFIG_FUZZ=y CFLAGS="$LIB_FUZZING_ENGINE" "-j$(nproc)" \
|
||||
i386-softmmu/fuzz; then
|
||||
fatal "Build failed. Please specify a compiler with fuzzing support"\
|
||||
"using the \$CC and \$CXX environemnt variables, or specify a"\
|
||||
"\$LIB_FUZZING_ENGINE compatible with your compiler"\
|
||||
"\nFor example: CC=clang CXX=clang++ $0"
|
||||
fi
|
||||
|
||||
for i in $(ldd ./i386-softmmu/qemu-fuzz-i386 | cut -f3 -d' '); do
|
||||
cp "$i" "$DEST_DIR/lib/"
|
||||
done
|
||||
rm ./i386-softmmu/qemu-fuzz-i386
|
||||
|
||||
# Build a second time to build the final binary with correct rpath
|
||||
../configure --bindir="$DEST_DIR" --datadir="$DEST_DIR/data/" --disable-werror \
|
||||
--cc="$CC" --cxx="$CXX" --extra-cflags="$EXTRA_CFLAGS" \
|
||||
--extra-ldflags="-Wl,-rpath,'\$\$ORIGIN/lib'"
|
||||
make CONFIG_FUZZ=y CFLAGS="$LIB_FUZZING_ENGINE" "-j$(nproc)" i386-softmmu/fuzz
|
||||
|
||||
# Copy over the datadir
|
||||
cp -r ../pc-bios/ "$DEST_DIR/pc-bios"
|
||||
|
||||
# Run the fuzzer with no arguments, to print the help-string and get the list
|
||||
# of available fuzz-targets. Copy over the qemu-fuzz-i386, naming it according
|
||||
# to each available fuzz target (See 05509c8e6d fuzz: select fuzz target using
|
||||
# executable name)
|
||||
for target in $(./i386-softmmu/qemu-fuzz-i386 | awk '$1 ~ /\*/ {print $2}');
|
||||
do
|
||||
cp ./i386-softmmu/qemu-fuzz-i386 "$DEST_DIR/qemu-fuzz-i386-target-$target"
|
||||
done
|
||||
|
||||
echo "Done. The fuzzers are located in $DEST_DIR"
|
||||
exit 0
|
||||
Loading…
Reference in New Issue