libfuzzer

You can find bugs in C/C++ code by using coverage-guided fuzzing with libFuzzer, which automatically generates diverse inputs to test program behavior and detect crashes. It leverages LLVM's instrumentation to efficiently explore code paths.

To set up a fuzzing campaign for a C++ project, compile your code with Clang using the '-fsanitize=fuzzer' flag. This integrates libFuzzer directly and enables coverage-guided fuzzing to automatically discover malformed inputs.

Coverage-guided fuzzing uses LLVM's instrumentation to monitor which code paths are executed during testing. It then prioritizes generating new inputs that explore untested paths, significantly enhancing bug detection efficiency in C/C++ projects.

Yes, you can fuzz a parsing library for a custom network protocol. The automated fuzzing process will discover malformed packet inputs that could trigger crashes or expose security vulnerabilities in your C/C++ parsing logic.

When fuzzing C/C++ projects, you need to manage fuzzing harnesses, input corpora, and dictionaries. Proper corpus management and dictionary usage help guide the fuzzer toward generating valid yet complex inputs to maximize code coverage.