98 lines
4.1 KiB
Bash
Executable File
98 lines
4.1 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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$SRC/build_cryptofuzz.sh
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cd $SRC/bitcoin-core/
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# Build dependencies
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# This will also force static builds
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if [ "$ARCHITECTURE" = "i386" ]; then
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export BUILD_TRIPLET="i686-pc-linux-gnu"
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else
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export BUILD_TRIPLET="x86_64-pc-linux-gnu"
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fi
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(
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cd depends
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sed -i --regexp-extended '/.*rm -rf .*extract_dir.*/d' ./funcs.mk # Keep extracted source
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make HOST=$BUILD_TRIPLET DEBUG=1 NO_QT=1 NO_WALLET=1 NO_ZMQ=1 NO_UPNP=1 NO_NATPMP=1 boost_cxxflags="-std=c++17 -fvisibility=hidden -fPIC ${CXXFLAGS}" libevent_cflags="${CFLAGS}" -j$(nproc)
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)
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# Build the fuzz targets
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sed -i "s|PROVIDE_FUZZ_MAIN_FUNCTION|NEVER_PROVIDE_MAIN_FOR_OSS_FUZZ|g" "./configure.ac"
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./autogen.sh
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# Temporarily compile with O2 to work around clang-13 (and later) UBSan
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# -fsanitize=vptr,object-size false positive that only happens with -O1
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if [ "$SANITIZER" = "undefined" ]; then
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export CFLAGS="$CFLAGS -O2"
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export CXXFLAGS="$CXXFLAGS -O2"
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fi
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# OSS-Fuzz will provide CC, CXX, etc. So only set:
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# * --enable-fuzz, see https://github.com/bitcoin/bitcoin/blob/master/doc/fuzzing.md
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# * CONFIG_SITE, see https://github.com/bitcoin/bitcoin/blob/master/depends/README.md
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if [ "$SANITIZER" = "memory" ]; then
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CONFIG_SITE="$PWD/depends/$BUILD_TRIPLET/share/config.site" ./configure --enable-fuzz SANITIZER_LDFLAGS="$LIB_FUZZING_ENGINE" --with-asm=no
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else
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CONFIG_SITE="$PWD/depends/$BUILD_TRIPLET/share/config.site" ./configure --enable-fuzz SANITIZER_LDFLAGS="$LIB_FUZZING_ENGINE"
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fi
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if [ "$SANITIZER" = "memory" ]; then
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# MemorySanitizer (MSAN) does not support tracking memory initialization done by
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# using the Linux getrandom syscall. Avoid using getrandom by undefining
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# HAVE_SYS_GETRANDOM. See https://github.com/google/sanitizers/issues/852 for
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# details.
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grep -v HAVE_SYS_GETRANDOM src/config/bitcoin-config.h > src/config/bitcoin-config.h.tmp
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mv src/config/bitcoin-config.h.tmp src/config/bitcoin-config.h
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fi
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make -j$(nproc)
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WRITE_ALL_FUZZ_TARGETS_AND_ABORT="/tmp/a" "./src/test/fuzz/fuzz" || true
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readarray FUZZ_TARGETS < "/tmp/a"
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if [ -n "${OSS_FUZZ_CI-}" ]; then
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# When running in CI, check the first targets only to save time and disk space
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FUZZ_TARGETS=( ${FUZZ_TARGETS[@]:0:2} )
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fi
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# OSS-Fuzz requires a separate and self-contained binary for each fuzz target.
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# To inject the fuzz target name in the finished binary, compile the fuzz
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# executable with a "magic string" as the name of the fuzz target.
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#
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# An alternative to mocking the string in the finished binary would be to
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# replace the string in the source code and re-invoke 'make'. This is slower,
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# so use the hack.
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export MAGIC_STR="b5813eee2abc9d3358151f298b75a72264ffa119d2f71ae7fefa15c4b70b4bc5b38e87e3107a730f25891ea428b2b4fabe7a84f5bfa73c79e0479e085e4ff157"
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sed -i "s|.*std::getenv(\"FUZZ\").*|std::string fuzz_target{\"$MAGIC_STR\"};|g" "./src/test/fuzz/fuzz.cpp"
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sed -i "s|.find(fuzz_target)|.find(fuzz_target.c_str())|g" "./src/test/fuzz/fuzz.cpp"
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make -j$(nproc)
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# Replace the magic string with the actual name of each fuzz target
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for fuzz_target in ${FUZZ_TARGETS[@]}; do
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python3 -c "c_str_target=b\"${fuzz_target}\x00\";c_str_magic=b\"$MAGIC_STR\";c=open('./src/test/fuzz/fuzz','rb').read();c=c.replace(c_str_magic, c_str_target+c_str_magic[len(c_str_target):]);open(\"$OUT/$fuzz_target\",'wb').write(c)"
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chmod +x "$OUT/$fuzz_target"
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(
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cd assets/fuzz_seed_corpus
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if [ -d "$fuzz_target" ]; then
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zip --recurse-paths --quiet --junk-paths "$OUT/${fuzz_target}_seed_corpus.zip" "${fuzz_target}"
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fi
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)
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done
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