##// END OF EJS Templates
phases: avoid N² behavior in `advanceboundary`...
phases: avoid N² behavior in `advanceboundary` We allowed duplicated entries in the deque, which each entry could potentially insert all its ancestors. So advancing boundary for the full repository would mean each revision would walk all its ancestors, resulting in O(N²) iteration. For repository of any decent size, N² is quickly insane. We introduce a simple set to avoid this and get back to reasonable performance.

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r44311:8766728d default
r52398:c9ceb4f6 6.7 stable
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fm1readmarkers.cc
59 lines | 1.4 KiB | text/x-c | CppLexer
Augie Fackler
fuzz: new fuzzer for parsers.fm1readmarkers...
r41053 #include <Python.h>
#include <assert.h>
#include <stdlib.h>
#include <unistd.h>
#include <string>
#include "pyutil.h"
extern "C" {
Augie Fackler
fuzz: add support for fuzzing under either Python 2 or 3...
r44311 static PYCODETYPE *code;
Augie Fackler
fuzz: new fuzzer for parsers.fm1readmarkers...
r41053
extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv)
{
contrib::initpy(*argv[0]);
Augie Fackler
fuzz: add support for fuzzing under either Python 2 or 3...
r44311 code = (PYCODETYPE *)Py_CompileString(R"py(
Augie Fackler
fuzz: new fuzzer for parsers.fm1readmarkers...
r41053 def maybeint(s, default):
try:
return int(s)
except ValueError:
return default
try:
parts = data.split('\0', 2)
if len(parts) == 3:
offset, stop, data = parts
elif len(parts) == 2:
stop, data = parts
offset = 0
else:
offset = stop = 0
offset, stop = maybeint(offset, 0), maybeint(stop, len(data))
Augie Fackler
fuzz: add support for fuzzing under either Python 2 or 3...
r44311 parsers.fm1readmarkers(data, offset, stop)
Augie Fackler
fuzz: new fuzzer for parsers.fm1readmarkers...
r41053 except Exception as e:
pass
# uncomment this print if you're editing this Python code
# to debug failures.
# print e
)py",
Augie Fackler
fuzz: add support for fuzzing under either Python 2 or 3...
r44311 "fuzzer", Py_file_input);
Augie Fackler
fuzz: new fuzzer for parsers.fm1readmarkers...
r41053 return 0;
}
int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
{
PyObject *text =
PyBytes_FromStringAndSize((const char *)Data, (Py_ssize_t)Size);
PyObject *locals = PyDict_New();
PyDict_SetItemString(locals, "data", text);
PyObject *res = PyEval_EvalCode(code, contrib::pyglobals(), locals);
if (!res) {
PyErr_Print();
}
Py_XDECREF(res);
Py_DECREF(locals);
Py_DECREF(text);
return 0; // Non-zero return values are reserved for future use.
}
}