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@@ -1,81 +1,83 b'' | |||
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1 | 1 | #include <Python.h> |
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2 | 2 | #include <assert.h> |
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3 | 3 | #include <stdlib.h> |
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4 | 4 | #include <unistd.h> |
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5 | 5 | |
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6 | 6 | #include <string> |
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7 | 7 | |
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8 | 8 | extern "C" { |
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9 | 9 | |
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10 | 10 | /* TODO: use Python 3 for this fuzzing? */ |
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11 | 11 | PyMODINIT_FUNC initparsers(void); |
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12 | 12 | |
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13 | 13 | static char cpypath[8192] = "\0"; |
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14 | 14 | |
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15 | static PyCodeObject *code; | |
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16 | static PyObject *mainmod; | |
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17 | static PyObject *globals; | |
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18 | ||
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15 | 19 | extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv) |
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16 | 20 | { |
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17 | 21 | const std::string subdir = "/sanpy/lib/python2.7"; |
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18 | 22 | /* HACK ALERT: we need a full Python installation built without |
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19 | 23 | pymalloc and with ASAN, so we dump one in |
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20 | 24 | $OUT/sanpy/lib/python2.7. This helps us wire that up. */ |
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21 | 25 | std::string selfpath(*argv[0]); |
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22 | 26 | std::string pypath; |
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23 | 27 | auto pos = selfpath.rfind("/"); |
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24 | 28 | if (pos == std::string::npos) { |
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25 | 29 | char wd[8192]; |
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26 | 30 | getcwd(wd, 8192); |
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27 | 31 | pypath = std::string(wd) + subdir; |
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28 | 32 | } else { |
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29 | 33 | pypath = selfpath.substr(0, pos) + subdir; |
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30 | 34 | } |
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31 | 35 | strncpy(cpypath, pypath.c_str(), pypath.size()); |
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32 | 36 | setenv("PYTHONPATH", cpypath, 1); |
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33 | 37 | setenv("PYTHONNOUSERSITE", "1", 1); |
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34 | 38 | /* prevent Python from looking up users in the fuzz environment */ |
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35 | 39 | setenv("PYTHONUSERBASE", cpypath, 1); |
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36 | 40 | Py_SetPythonHome(cpypath); |
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37 | 41 | Py_InitializeEx(0); |
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38 | return 0; | |
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39 | } | |
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40 | ||
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41 | int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) | |
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42 | { | |
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43 | 42 | initparsers(); |
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44 | PyObject *mtext = | |
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45 | PyBytes_FromStringAndSize((const char *)Data, (Py_ssize_t)Size); | |
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46 | PyObject *mainmod = PyImport_AddModule("__main__"); | |
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47 | PyObject *globals = PyModule_GetDict(mainmod); | |
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48 | PyObject *locals = PyDict_New(); | |
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49 | PyDict_SetItemString(locals, "mdata", mtext); | |
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50 | PyCodeObject *code = | |
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51 | (PyCodeObject *)Py_CompileString(R"py( | |
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43 | code = (PyCodeObject *)Py_CompileString(R"py( | |
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52 | 44 | from parsers import lazymanifest |
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53 | 45 | try: |
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54 | 46 | lm = lazymanifest(mdata) |
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55 | 47 | # iterate the whole thing, which causes the code to fully parse |
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56 | 48 | # every line in the manifest |
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57 | 49 | list(lm.iterentries()) |
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58 | 50 | lm[b'xyzzy'] = (b'\0' * 20, 'x') |
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59 | 51 | # do an insert, text should change |
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60 | 52 | assert lm.text() != mdata, "insert should change text and didn't: %r %r" % (lm.text(), mdata) |
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61 | 53 | del lm[b'xyzzy'] |
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62 | 54 | # should be back to the same |
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63 | 55 | assert lm.text() == mdata, "delete should have restored text but didn't: %r %r" % (lm.text(), mdata) |
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64 | 56 | except Exception as e: |
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65 | 57 | pass |
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66 | 58 | # uncomment this print if you're editing this Python code |
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67 | 59 | # to debug failures. |
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68 | 60 | # print e |
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69 | 61 | )py", |
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70 | "fuzzer", Py_file_input); | |
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62 | "fuzzer", Py_file_input); | |
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63 | mainmod = PyImport_AddModule("__main__"); | |
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64 | globals = PyModule_GetDict(mainmod); | |
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65 | return 0; | |
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66 | } | |
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67 | ||
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68 | int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) | |
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69 | { | |
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70 | PyObject *mtext = | |
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71 | PyBytes_FromStringAndSize((const char *)Data, (Py_ssize_t)Size); | |
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72 | PyObject *locals = PyDict_New(); | |
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73 | PyDict_SetItemString(locals, "mdata", mtext); | |
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71 | 74 | PyObject *res = PyEval_EvalCode(code, globals, locals); |
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72 | 75 | if (!res) { |
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73 | 76 | PyErr_Print(); |
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74 | 77 | } |
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75 | 78 | Py_XDECREF(res); |
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76 | Py_DECREF(code); | |
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77 | 79 | Py_DECREF(locals); |
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78 | 80 | Py_DECREF(mtext); |
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79 | 81 | return 0; // Non-zero return values are reserved for future use. |
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80 | 82 | } |
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81 | 83 | } |
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