targets.txt is empty when compiling tiffcrop.bc with CBI instrumentation

[zchengchen]

While following the procedure for the tiffcrop issue (#488, BIC: 7057734d, BFC: 97d65859), I encountered a problem during fuzzing. Below are the steps I followed:

git clone https://gitlab.com/libtiff/libtiff.git /home/waflgo-libtiff
cd /home/waflgo-libtiff; git checkout 07d79fcac

export ADD="-g --notI "
export CC=/home/WAFLGo/afl-clang-fast CXX=/home/WAFLGo/afl-clang-fast++  CFLAGS="$ADD" CXXFLAGS="$ADD"
export AFL_CC=gclang AFL_CXX=gclang++

cmake . 
make clean;make -j $(nproc) 
unset AFL_CC AFL_CXX

# ** Get bitcode file from executable file

cp ./tools/tiffcrop ./
get-bc tiffcrop

# ** Set the target site

mkdir fuzz; cd fuzz
cp ../tiffcrop.bc .

echo $'' > $TMP_DIR/BBtargets.txt
git diff HEAD^1 HEAD > ./commit.diff
cp /home/showlinenum.awk ./
sed -i -e 's/\r$//' showlinenum.awk
chmod +x showlinenum.awk
cat ./commit.diff |  ./showlinenum.awk show_header=0 path=1 | grep -e "\.[ch]:[0-9]*:+" -e "\.cpp:[0-9]*:+" -e "\.cc:[0-9]*:+" | cut -d+ -f1 | rev | cut -c2- | rev > ./targets

# cat ./targets

# ** Instrument

/home/WAFLGo/instrument/bin/cbi --targets=targets tiffcrop.bc --stats=false
cp ./targets_id.txt /home
cp ./suffix.txt /home
cp ./targets*.txt /home
cp ./distance.txt /home
cp ./branch-distance.txt /home
cp ./branch-distance-min.txt /home
cp ./branch-curloc.txt /home
cp ./*_data.txt /home

# ** Compile bitcode file to executable file which is used to be fuzzed

/home/WAFLGo/afl-clang-fast++ tiffcrop.ci.bc  -lstdc++ -ltiff -o tiffcrop.ci
cp ./bbinfo-fast.txt /home/bbinfo-ci-bc.txt
cp ./branch-distance-order.txt /home
cp ./*-distance-order.txt /home
cp ./*-order.txt /home

/home/WAFLGo/afl-fuzz  -T waflgo-libtiff -t 1000+ -m none -z exp -c 45m -q 1 -i /home/jpg -o /home/out -- /home/waflgo-libtiff/fuzz/[tiffcrop.ci](http://tiffcrop.ci/)  @@

However, when running afl-fuzz, I received the following message:

[afl++ 5ee78209c115] /home/waflgo-libtiff/fuzz ((07d79fca...)) # cat targets.txt
[afl++ 5ee78209c115] /home/waflgo-libtiff/fuzz ((07d79fca...)) # 

Using the WAFLGo Docker image provided on GitHub.