contrib/fuzz/dirs.cc
author Manuel Jacob <me@manueljacob.de>
Thu, 15 Sep 2022 01:48:38 +0200
changeset 49494 c96ed4029fda
parent 43859 8766728dbce6
permissions -rw-r--r--
templates: add filter to reverse list The filter supports only lists because for lists, it’s straightforward to implement. Reversing text doesn’t seem very useful and is hard to implement. Reversing the bytes would break multi-bytes encodings. Reversing the code points would break characters consisting of multiple code points. Reversing graphemes is non-trivial without using a library not included in the standard library.
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#include <Python.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "pyutil.h"
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#include <string>
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extern "C" {
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static PYCODETYPE *code;
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extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv)
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{
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	contrib::initpy(*argv[0]);
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	code = (PYCODETYPE *)Py_CompileString(R"py(
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try:
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  files = mdata.split('\n')
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  d = parsers.dirs(files)
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  list(d)
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  'a' in d
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  if files:
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    files[0] in d
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except Exception as e:
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  pass
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  # uncomment this print if you're editing this Python code
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  # to debug failures.
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  # print e
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)py",
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	                                      "fuzzer", Py_file_input);
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	return 0;
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}
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int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
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{
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	// Don't allow fuzzer inputs larger than 100k, since we'll just bog
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	// down and not accomplish much.
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	if (Size > 100000) {
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		return 0;
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	}
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	PyObject *mtext =
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	    PyBytes_FromStringAndSize((const char *)Data, (Py_ssize_t)Size);
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	PyObject *locals = PyDict_New();
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	PyDict_SetItemString(locals, "mdata", mtext);
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	PyObject *res = PyEval_EvalCode(code, contrib::pyglobals(), locals);
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	if (!res) {
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		PyErr_Print();
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	}
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	Py_XDECREF(res);
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	Py_DECREF(locals);
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	Py_DECREF(mtext);
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	return 0; // Non-zero return values are reserved for future use.
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}
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}