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And check that LIB_FUZZING_ENGINE is set during configure.
Because:
1. It's easier to build locally this way (you don't need to build or hack a
libFuzzingEngine.a - instead you can just specify
LIB_FUZZING_ENGINE=-fsanitize=fuzzer to produce a valid build).
2. Using -lFuzzingEngine is deprecated [1] for various reasons [2].
The old behaviour can be emulated if desired by setting
LIB_FUZZING_ENGINE=-lFuzzingEngine .
This patch was tested as follows:
- Building LO within oss-fuzz via:
python infra/helper.py build_fuzzers --sanitizer address libreoffice </path/to/patched-libreoffice-core>
python infra/helper.py check_build libreoffice
- Building LO fuzzers standalone via:
export CC="clang-11"
export CXX="clang++-11 -stdlib=libc++"
export CFLAGS="-fsanitize=address -fsanitize-address-use-after-scope -fsanitize=fuzzer-no-link -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION"
export CXXFLAGS="$CFLAGS -stdlib=libc++"
export LDFLAGS="$CFLAGS -Wl,--compress-debug-sections,zlib -lpthread"
export LIB_FUZZING_ENGINE=-fsanitize=fuzzer
./autogen.sh --with-distro=LibreOfficeOssFuzz --with-system-libxml
make fuzzers
(--with-system-libxml only appears to be needed because of issues
specific to my build environment/Suse 15.2. I'm invoking clang-11 simply
because that's the most modern clang I have installed, plain clang should
also work on most sufficiently modern systems).
[1]
https://github.com/google/oss-fuzz/blob/481280c65048fd12fb2141b9225af511a9ef7ed2/infra/presubmit.py#L46
[2] https://github.com/google/oss-fuzz/issues/2164
Change-Id: Iddb577c30a39620e72372ef6c2d3fda67f8aabdf
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/111691
Tested-by: Jenkins
Tested-by: Caolán McNamara <caolanm@redhat.com>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
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Change-Id: Iee390bd5e241536d4f55743083468c433417f572
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the core lib has grown sufficiently large that the fuzzing tooling
complains of too many instrumented conditions so split things
up to hopefully fit again
Change-Id: I58899d143925f958aec95b5f213c2dc75a6686ec
Reviewed-on: https://gerrit.libreoffice.org/38647
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>
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Change-Id: I518bd8dc6fd50e96746d6d415190551c6cbfdea5
Reviewed-on: https://gerrit.libreoffice.org/35178
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>
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