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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 "FuzzedDataProvider.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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lm = parsers.lazymanifest(mdata)
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# iterate the whole thing, which causes the code to fully parse
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# every line in the manifest
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for e, _, _ in lm.iterentries():
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# also exercise __getitem__ et al
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lm[e]
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e in lm
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(e + 'nope') in lm
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lm[b'xyzzy'] = (b'\0' * nlen, 'x')
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# do an insert, text should change
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assert lm.text() != mdata, "insert should change text and didn't: %r %r" % (lm.text(), mdata)
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cloned = lm.filtercopy(lambda x: x != 'xyzzy')
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assert cloned.text() == mdata, 'cloned text should equal mdata'
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cloned.diff(lm)
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del lm[b'xyzzy']
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cloned.diff(lm)
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# should be back to the same
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assert lm.text() == mdata, "delete should have restored text but didn't: %r %r" % (lm.text(), mdata)
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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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FuzzedDataProvider provider(Data, Size);
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Py_ssize_t nodelength = provider.ConsumeBool() ? 20 : 32;
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PyObject *nlen = PyLong_FromSsize_t(nodelength);
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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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PyDict_SetItemString(locals, "nlen", nlen);
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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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}
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