Mercurial > hg
view contrib/fuzz/jsonescapeu8fast.cc @ 51597:b4a6a1ff8fce
tags-cache: skip the filternode step if we are not going to use it
When warming the hgtagsfnodescache, we don't need the actual result, so we can
simply skip the part that "filter" fnode we read from the cache. So provide a
quite visible speed up to the top level `hg debugupdatecache` function.
### data-env-vars.name = mozilla-try-2023-03-22-zstd-sparse-revlog
# benchmark.name = hg.debug.debug-update-cache
# bin-env-vars.hg.flavor = default
# bin-env-vars.hg.py-re2-module = default
# benchmark.variants.pre-state = warm
before: 19.947581
after: 18.916804 (-5.17%, -1.03)
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Wed, 13 Mar 2024 11:38:28 +0100 |
parents | 8766728dbce6 |
children |
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#include <Python.h> #include <assert.h> #include <stdlib.h> #include <unistd.h> #include "pyutil.h" #include <iostream> #include <string> #include "FuzzedDataProvider.h" extern "C" { static PYCODETYPE *code; extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv) { contrib::initpy(*argv[0]); code = (PYCODETYPE *)Py_CompileString(R"py( try: parsers.jsonescapeu8fast(data, paranoid) 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); if (!code) { std::cerr << "failed to compile Python code!" << std::endl; } return 0; } int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) { FuzzedDataProvider provider(Data, Size); bool paranoid = provider.ConsumeBool(); std::string remainder = provider.ConsumeRemainingBytesAsString(); PyObject *mtext = PyBytes_FromStringAndSize( (const char *)remainder.c_str(), remainder.size()); PyObject *locals = PyDict_New(); PyDict_SetItemString(locals, "data", mtext); PyDict_SetItemString(locals, "paranoid", paranoid ? Py_True : Py_False); PyObject *res = PyEval_EvalCode(code, contrib::pyglobals(), 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. } }