AFLplusplus/utils/aflpp_driver

afl++ drivers

aflpp_driver

aflpp_driver is used to compile directly libfuzzer LLVMFuzzerTestOneInput() targets.

Just do afl-clang-fast++ -o fuzz fuzzer_harness.cc libAFLDriver.a [plus required linking].

You can also sneakily do this little trick: If this is the clang compile command to build for libfuzzer: clang++ -o fuzz -fsanitize=fuzzer fuzzer_harness.cc -lfoo then just switch clang++ with afl-clang-fast++ and our compiler will magically insert libAFLDriver.a :)

aflpp_qemu_driver

aflpp_qemu_driver is used for libfuzzer LLVMFuzzerTestOneInput() targets that are to be fuzzed in qemu_mode. So we compile them with clang/clang++, without -fsantize=fuzzer or afl-clang-fast, and link in libAFLQemuDriver.a:

clang++ -o fuzz fuzzer_harness.cc libAFLQemuDriver.a [plus required linking].

Then just do (where the name of the binary is fuzz):

AFL_QEMU_PERSISTENT_ADDR=0x$(nm fuzz | grep "T LLVMFuzzerTestOneInput" | awk '{print $1}')
AFL_QEMU_PERSISTENT_HOOK=/path/to/aflpp_qemu_driver_hook.so afl-fuzz -Q ... -- ./fuzz`