Mercurial > hg
view contrib/fuzz/revlog.cc @ 41309:afc33a5705b9
fuzz: don't allow enormous revlog inputs either
I'm about to make the fuzzer do more, and without this it was getting
enthusiastic about large (and therefore slow) inputs that I don't
think buy us much.
Differential Revision: https://phab.mercurial-scm.org/D5640
author | Augie Fackler <raf@durin42.com> |
---|---|
date | Tue, 22 Jan 2019 11:18:05 -0500 |
parents | c06f0ef9a5ba |
children | ebe51a2e75be |
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#include <Python.h> #include <assert.h> #include <stdlib.h> #include <unistd.h> #include <string> #include "pyutil.h" extern "C" { static PyCodeObject *code; extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv) { contrib::initpy(*argv[0]); code = (PyCodeObject *)Py_CompileString(R"py( from parsers import parse_index2 for inline in (True, False): try: index, cache = parse_index2(data, inline) except Exception as e: pass # uncomment this print if you're editing this Python code # to debug failures. # print e )py", "fuzzer", Py_file_input); return 0; } int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) { // Don't allow fuzzer inputs larger than 60k, since we'll just bog // down and not accomplish much. if (Size > 60000) { return 0; } PyObject *text = PyBytes_FromStringAndSize((const char *)Data, (Py_ssize_t)Size); PyObject *locals = PyDict_New(); PyDict_SetItemString(locals, "data", text); PyObject *res = PyEval_EvalCode(code, contrib::pyglobals(), locals); if (!res) { PyErr_Print(); } Py_XDECREF(res); Py_DECREF(locals); Py_DECREF(text); return 0; // Non-zero return values are reserved for future use. } }