libFuzzer instructions for libxslt

==================================

Set compiler and options. Disable float-divide-by-zero and pointer-overflow

sanitizers when using UBSan.

export CC=clang

export CFLAGS="-g -fsanitize=fuzzer-no-link,address,undefined \

-fno-sanitize=float-divide-by-zero,pointer-overflow \

-fno-sanitize-recover=all \

-DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION"

Build libxml2 with instrumentation:

cd /path/to/libxml2

./configure --without-python

make

Build libxslt with instrumentation:

cd /path/to/libxslt

./configure --without-python --with-libxml-src=/path/to/libxml2

make

Run fuzzers:

make -C tests/fuzz fuzz-xslt

make -C tests/fuzz fuzz-xpath