tests: filter out uninteresting log events
This helps adding more log()s without updating the tests.
#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";
static PyCodeObject *code;
static PyObject *mainmod;
static PyObject *globals;
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);
setenv("PYTHONNOUSERSITE", "1", 1);
/* prevent Python from looking up users in the fuzz environment */
setenv("PYTHONUSERBASE", cpypath, 1);
Py_SetPythonHome(cpypath);
Py_InitializeEx(0);
initparsers();
code = (PyCodeObject *)Py_CompileString(R"py(
from parsers import lazymanifest
try:
lm = lazymanifest(mdata)
# 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);
mainmod = PyImport_AddModule("__main__");
globals = PyModule_GetDict(mainmod);
return 0;
}
int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
{
PyObject *mtext =
PyBytes_FromStringAndSize((const char *)Data, (Py_ssize_t)Size);
PyObject *locals = PyDict_New();
PyDict_SetItemString(locals, "mdata", mtext);
PyObject *res = PyEval_EvalCode(code, globals, locals);
if (!res) {
PyErr_Print();
}
Py_XDECREF(res);
Py_DECREF(locals);
Py_DECREF(mtext);
return 0; // Non-zero return values are reserved for future use.
}
}