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[wuffs] Build C++ fuzzers too, not just C ones (#6211)

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Nigel Tao 2021-08-14 14:54:00 +10:00 committed by GitHub
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commit e21bde5a3c
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1 changed files with 27 additions and 7 deletions
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34
projects/wuffs/build.sh
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@ -19,14 +19,34 @@
# Wuffs' generated C files are "drop-in libraries" a la
# http://gpfault.net/posts/drop-in-libraries.txt.html
for f in fuzz/c/std/*_fuzzer.c; do
# Extract the format name, such as "gzip", from the C file name,
# "fuzz/c/std/gzip_fuzzer.c".
b=$(basename $f _fuzzer.c)
for f in fuzz/c/std/*_fuzzer.c*; do
# Extract the format name (such as "gzip", from the C or C++ file name,
# "fuzz/c/std/gzip_fuzzer.c") and make the "gzip_fuzzer" binary. First
# compile the (C or C++) Wuffs code...
extension="${f##*.}"
if [ "$extension" = "c" ]; then
echo "Building (C) $f"
b=$(basename $f _fuzzer.c)
$CC $CFLAGS -c $f -o $WORK/${b}_fuzzer.o
elif [ "$extension" = "cc" ]; then
if [[ $LIB_FUZZING_ENGINE == *"DataFlow"* ]]; then
# Linking (below) with "--engine dataflow" works with the C fuzzers but
# not the C++ ones. With C++, we get errors like `undefined reference to
# `dfs$_ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEED2Ev'`
#
# This is possibly "DFsan instrumented dependencies"
# https://github.com/google/oss-fuzz/issues/3388
echo "Skipping (C++) $f"
continue
fi
echo "Building (C++) $f"
b=$(basename $f _fuzzer.cc)
$CXX $CXXFLAGS -c $f -o $WORK/${b}_fuzzer.o
else
continue
fi
# Make the "gzip_fuzzer" binary. First compile the (C) Wuffs code, then link
# the (C++) fuzzing library.
$CC $CFLAGS -c $f -o $WORK/${b}_fuzzer.o
# ...then link the (C++) fuzzing library.
$CXX $CXXFLAGS $WORK/${b}_fuzzer.o -o $OUT/${b}_fuzzer $LIB_FUZZING_ENGINE
# Make the optional "gzip_fuzzer_seed_corpus.zip" archive. This means