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contrib/fuzz/manifest_corpus.py
author Augie Fackler <augie@google.com>
Thu, 06 Sep 2018 02:36:25 -0400
changeset 40053 8c692a6b5ad1
child 43076 2372284d9457
permissions -rw-r--r--
fuzz: new fuzzer for cext/manifest.c This is a bit messy, because lazymanifest is tightly coupled to the cpython API for performance reasons. As a result, we have to build a whole Python without pymalloc (so ASAN can help us out) and link against that. Then we have to use an embedded Python interpreter. We could manually drive the lazymanifest in C from that point, but experimentally just using PyEval_EvalCode isn't really any slower so we may as well do that and write the innermost guts of the fuzzer in Python. Leak detection is currently disabled for this fuzzer because there are a few global-lifetime things in our extensions that we more or less intentionally leak and I didn't want to take the detour to work around that for now. This should not be pushed to our repo until https://github.com/google/oss-fuzz/pull/1853 is merged, as this depends on having the Python tarball around. Differential Revision: https://phab.mercurial-scm.org/D4879
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from __future__ import absolute_import, print_function
8c692a6b5ad1 fuzz: new fuzzer for cext/manifest.c
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import argparse












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import zipfile












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ap = argparse.ArgumentParser()












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ap.add_argument("out", metavar="some.zip", type=str, nargs=1)












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args = ap.parse_args()












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with zipfile.ZipFile(args.out[0], "w", zipfile.ZIP_STORED) as zf:












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    zf.writestr("manifest_zero",












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'''PKG-INFO\09b3ed8f2b81095a13064402e930565f083346e9a












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README\080b6e76643dcb44d4bc729e932fc464b3e36dbe3












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hg\0b6444347c629cc058d478023905cfb83b7f5bb9d












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mercurial/__init__.py\0b80de5d138758541c5f05265ad144ab9fa86d1db












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mercurial/byterange.py\017f5a9fbd99622f31a392c33ac1e903925dc80ed












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mercurial/fancyopts.py\0b6f52e23e356748c5039313d8b639cda16bf67ba












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mercurial/hg.py\023cc12f225f1b42f32dc0d897a4f95a38ddc8f4a












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mercurial/mdiff.py\0a05f65c44bfbeec6a42336cd2ff0b30217899ca3












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mercurial/revlog.py\0217bc3fde6d82c0210cf56aeae11d05a03f35b2b












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mercurial/transaction.py\09d180df101dc14ce3dd582fd998b36c98b3e39aa












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notes.txt\0703afcec5edb749cf5cec67831f554d6da13f2fb












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setup.py\0ccf3f6daf0f13101ca73631f7a1769e328b472c9












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tkmerge\03c922edb43a9c143682f7bc7b00f98b3c756ebe7












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''')












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    zf.writestr("badmanifest_shorthashes",












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                "narf\0aa\nnarf2\0aaa\n")












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    zf.writestr("badmanifest_nonull",












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                "narf\0cccccccccccccccccccccccccccccccccccccccc\n"












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                "narf2aaaaaaaaaaaaaaaaaaaa\n")














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