Fuzz Environment Runner

Sets up isolated Python virtual environments using uv, installs library dependencies and atheris, runs fuzz.py with LibFuzzer flags, and captures output to fuzz.log.

Workflow

1. Create .venv using uv venv .venv in each library directory
2. Install atheris and library dependencies via uv pip install
3. Run fuzzer with -max_total_time=10 flag
4. Capture stdout+stderr to fuzz.log

Key Functions

• setup_venv_with_uv(lib_path) - Create virtual environment
• install_dependencies(lib_path, venv_path) - Install deps and atheris
• run_fuzzer_with_timeout(lib_path, timeout_seconds=10) - Run fuzzer and log output
• capture_fuzz_log(lib_path) - Read fuzz.log contents

Usage

import sys
sys.path.insert(0, '/app/environment/skills/evo-fuzz-env-runner/scripts')
from runner import setup_venv_with_uv, install_dependencies, run_fuzzer_with_timeout

venv = setup_venv_with_uv('/app/arrow')
install_dependencies('/app/arrow', venv)
run_fuzzer_with_timeout('/app/arrow', timeout_seconds=10)