--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/contrib/fuzz/manifest.cc Thu Sep 06 02:36:25 2018 -0400
@@ -0,0 +1,75 @@
+#include <Python.h>
+#include <assert.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <string>
+
+extern "C" {
+
+/* TODO: use Python 3 for this fuzzing? */
+PyMODINIT_FUNC initparsers(void);
+
+static char cpypath[8192] = "\0";
+
+extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv)
+{
+ const std::string subdir = "/sanpy/lib/python2.7";
+ /* HACK ALERT: we need a full Python installation built without
+ pymalloc and with ASAN, so we dump one in
+ $OUT/sanpy/lib/python2.7. This helps us wire that up. */
+ std::string selfpath(*argv[0]);
+ std::string pypath;
+ auto pos = selfpath.rfind("/");
+ if (pos == std::string::npos) {
+ char wd[8192];
+ getcwd(wd, 8192);
+ pypath = std::string(wd) + subdir;
+ } else {
+ pypath = selfpath.substr(0, pos) + subdir;
+ }
+ strncpy(cpypath, pypath.c_str(), pypath.size());
+ setenv("PYTHONPATH", cpypath, 1);
+ Py_SetPythonHome(cpypath);
+ return 0;
+}
+
+int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
+{
+ Py_InitializeEx(0);
+ initparsers();
+ PyObject *mtext =
+ PyBytes_FromStringAndSize((const char *)Data, (Py_ssize_t)Size);
+ PyObject *mainmod = PyImport_AddModule("__main__");
+ PyObject *globals = PyModule_GetDict(mainmod);
+ PyObject *locals = PyDict_New();
+ PyDict_SetItemString(locals, "mdata", mtext);
+ PyCodeObject *code =
+ (PyCodeObject *)Py_CompileString(R"py(
+from parsers import lazymanifest
+lm = lazymanifest(mdata)
+try:
+ # iterate the whole thing, which causes the code to fully parse
+ # every line in the manifest
+ list(lm.iterentries())
+ lm[b'xyzzy'] = (b'\0' * 20, 'x')
+ # do an insert, text should change
+ assert lm.text() != mdata, "insert should change text and didn't: %r %r" % (lm.text(), mdata)
+ del lm[b'xyzzy']
+ # should be back to the same
+ assert lm.text() == mdata, "delete should have restored text but didn't: %r %r" % (lm.text(), mdata)
+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);
+ PyEval_EvalCode(code, globals, locals);
+ Py_DECREF(code);
+ Py_DECREF(locals);
+ Py_DECREF(mtext);
+ Py_Finalize();
+ return 0; // Non-zero return values are reserved for future use.
+}
+}