contrib/fuzz/jsonescapeu8fast.cc
author Pierre-Yves David <pierre-yves.david@octobus.net>
Thu, 01 Sep 2022 15:49:14 +0200
branchstable
changeset 49469 b5c8524827d2
parent 43859 8766728dbce6
permissions -rw-r--r--
dirstate-v2: no longer register the data-file during transaction If the data file change during the transaction, we cannot truncate it. The content of the file itself is fine as it will get backed up at the same time as the docket. Leaving the trailing data at the end of failed transaction is fine. The dirstate-v2 format supports it. The dead data will simply we written over if necessary.
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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 "pyutil.h"
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#include <iostream>
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#include <string>
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#include "FuzzedDataProvider.h"
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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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    parsers.jsonescapeu8fast(data, paranoid)
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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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	if (!code) {
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		std::cerr << "failed to compile Python code!" << std::endl;
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	}
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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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	FuzzedDataProvider provider(Data, Size);
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	bool paranoid = provider.ConsumeBool();
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	std::string remainder = provider.ConsumeRemainingBytesAsString();
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	PyObject *mtext = PyBytes_FromStringAndSize(
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	    (const char *)remainder.c_str(), remainder.size());
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	PyObject *locals = PyDict_New();
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	PyDict_SetItemString(locals, "data", mtext);
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	PyDict_SetItemString(locals, "paranoid", paranoid ? Py_True : Py_False);
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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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}