commit 0fb1156e9f0ee62e9b704e9e56ebae3c8d436218 Author: teor teor2345@gmail.com Date: Tue Dec 13 16:23:12 2016 +1100

Add a script for running multiple fuzzing sessions on multiple cores --- doc/HACKING/Fuzzing.md | 1 + src/test/fuzz_multi.sh | 34 ++++++++++++++++++++++++++++++++++ 2 files changed, 35 insertions(+)

diff --git a/doc/HACKING/Fuzzing.md b/doc/HACKING/Fuzzing.md index 7ba7f49..703f028 100644 --- a/doc/HACKING/Fuzzing.md +++ b/doc/HACKING/Fuzzing.md @@ -42,6 +42,7 @@ To Run: ../afl/afl-fuzz -i src/test/fuzz/fuzz_dir_testcase -o src/test/fuzz/fuzz_dir_findings -m <asan-memory-limit> -- src/test/fuzz_dir

AFL has a multi-core mode, check the documentation for details. +You might find the included fuzz-multi.sh script useful for this.

macOS (OS X) requires slightly more preparation, including: * using afl-clang (or afl-clang-fast from the llvm directory) diff --git a/src/test/fuzz_multi.sh b/src/test/fuzz_multi.sh new file mode 100755 index 0000000..b4a17ed --- /dev/null +++ b/src/test/fuzz_multi.sh @@ -0,0 +1,34 @@ +MEMLIMIT_BYTES=21990500990976 + +N_CPUS=1 +if [ $# -ge 1 ]; then + N_CPUS="$1" + shift +fi + +FILTER=echo + +for i in `seq -w "$N_CPUS"`; do + if [ "$i" -eq 1 ]; then + if [ "$N_CPUS" -eq 1 ]; then + INSTANCE="" + NUMBER="" + else + INSTANCE="-M" + NUMBER="$i" + fi + else + INSTANCE="-S" + NUMBER="$i" + fi + # use whatever remains on the command-line to prefix the fuzzer command + # you have to copy and paste and run these commands yourself + "$FILTER" "$@" \ + ../afl/afl-fuzz \ + -i src/test/fuzz/fuzz_dir_testcase \ + -o src/test/fuzz/fuzz_dir_findings \ + -x src/test/fuzz/fuzz_dir_dictionary/fuzz_dir_http_header.dct \ + -m "$MEMLIMIT_BYTES" \ + "$INSTANCE" "$NUMBER" \ + -- src/test/fuzz_dir +done