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AidenRHall avatar AidenRHall commented on April 28, 2024

Thanks for bringing this to our attention. I was able to reproduce this issue locally, and although I haven't fully root caused the issue, it does look like moving the call to LoadLibrary into the with atheris.instrument_imports() statement solves this issue on my machine. Can you confirm?

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ganler avatar ganler commented on April 28, 2024

Hi @AidenRHall , thanks for the attention!

Using:

import atheris

with atheris.instrument_imports():
    import sys
    from ctypes import cdll

    libfoo = cdll.LoadLibrary("./libfoo.so")


def TestOneInput(data):
    print(f"libfoo.foo(1) = {libfoo.foo(1)}")
    print(f"libfoo.foo(2) = {libfoo.foo(2)}")
    print(f"libfoo.foo(3) = {libfoo.foo(3)}")
    print(f"libfoo.foo(4) = {libfoo.foo(4)}")
    print(f"libfoo.foo(len(data)) = {len(data)}")


def main():
    atheris.Setup(sys.argv, TestOneInput)
    atheris.Fuzz()


if __name__ == "__main__":
    main()

I still cannot get coverage info (even I tried LLVM-COV more than GCOV).

image

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