mirror of https://github.com/google/oss-fuzz.git
80 lines
3.2 KiB
Bash
Executable File
80 lines
3.2 KiB
Bash
Executable File
#!/bin/bash -eu
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# Copyright 2021 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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################################################################################
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# This script is supposed to be compatible with OSS-Fuzz, i.e. it has to use
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# environment variables like $CC, $CFLAGS, $OUT, link the fuzz targets with CXX
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# (even though the project is written in C) and so on:
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# https://google.github.io/oss-fuzz/getting-started/new-project-guide/#buildsh
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# It can be used to build and run the fuzz targets using Docker and the images
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# provided by the OSS-Fuzz project: https://google.github.io/oss-fuzz/advanced-topics/reproducing/#building-using-docker
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# It can also be used to build and run the fuzz target locally without Docker.
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# After installing clang and the build dependencies of libelf by running something
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# like `dnf build-dep elfutils-devel` on Fedora or `apt-get build-dep libelf-dev`
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# on Debian/Ubuntu, the following commands should be run:
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#
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# $ git clone https://github.com/google/oss-fuzz
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# $ cd oss-fuzz/projects/elfutils
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# $ git clone git://sourceware.org/git/elfutils.git
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# $ ./build.sh
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# $ unzip -d CORPUS fuzz-dwfl-core_seed_corpus.zip
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# $ ./out/fuzz-dwfl-core CORPUS/
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set -eux
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SANITIZER=${SANITIZER:-address}
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flags="-O1 -fno-omit-frame-pointer -gline-tables-only -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION -fsanitize=$SANITIZER -fsanitize=fuzzer-no-link"
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export CC=${CC:-clang}
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export CFLAGS=${CFLAGS:-$flags}
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export CXX=${CXX:-clang++}
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export CXXFLAGS=${CXXFLAGS:-$flags}
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export SRC=${SRC:-$(realpath -- $(dirname -- "$0"))}
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export OUT=${OUT:-"$SRC/out"}
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mkdir -p "$OUT"
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export LIB_FUZZING_ENGINE=${LIB_FUZZING_ENGINE:--fsanitize=fuzzer}
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cd "$SRC/elfutils"
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# ASan isn't compatible with -Wl,--no-undefined: https://github.com/google/sanitizers/issues/380
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find -name Makefile.am | xargs sed -i 's/,--no-undefined//' &&
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# ASan isn't compatible with -Wl,-z,defs either:
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# https://clang.llvm.org/docs/AddressSanitizer.html#usage
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sed -i 's/^\(ZDEFS_LDFLAGS=\).*/\1/' configure.ac &&
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autoreconf -i -f &&
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./configure --enable-maintainer-mode --disable-debuginfod --disable-libdebuginfod \
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--without-bzlib --without-lzma --without-zstd \
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CC="$CC" CFLAGS="-Wno-error $CFLAGS" CXX="-Wno-error $CXX" CXXFLAGS="$CXXFLAGS" LDFLAGS="$CFLAGS" &&
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ASAN_OPTIONS=detect_leaks=0 make -j$(nproc) V=1
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ZLIB_DIR=$(pkg-config --variable=libdir zlib)
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$CC $CFLAGS \
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-D_GNU_SOURCE -DHAVE_CONFIG_H \
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-I. -I./lib -I./libelf -I./libebl -I./libdw -I./libdwelf -I./libdwfl -I./libasm \
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-c "$SRC/fuzz-dwfl-core.c" -o fuzz-dwfl-core.o
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$CXX $CXXFLAGS $LIB_FUZZING_ENGINE fuzz-dwfl-core.o \
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./libdw/libdw.a ./libelf/libelf.a "$ZLIB_DIR/libz.a" \
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-o "$OUT/fuzz-dwfl-core"
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cp "$SRC/fuzz-dwfl-core_seed_corpus.zip" "$OUT"
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