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Atheris is a coverage-guided fuzzer for CPython that treats Python as a first-class fuzzing target, enabling rapid discovery of crashes and logic errors in pure-Python code and native extensions. It hooks into Python’s interpreter to collect fine-grained coverage and uses that signal to evolve inputs, pushing programs into previously unexplored code paths. Because many Python libraries are thin wrappers over C/C++ code, Atheris is equally adept at surfacing memory safety issues in extension modules compiled with sanitizers. ...

The Automated Testing System (ATS) is a Python-based tool for automating the running of tests of an application. ATS can test any program that can signal success or failure via its exit status. ATS is an object-oriented Python program that provides abstractions for user defined tests (usually specified with an executable and command line and / or an input file). It runs these tests, either in serial or in parallel, and creates a log file (or files) describing the results of running the tests. ...