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node: manually implement Debug...
node: manually implement Debug I got too irritated today with the default Debug implementation of hg::revlog::Node while playing with a new parser. This isn't quite what I wanted, but it wasn't much code and it at least gives you output that's easy to visually compare to a node.hex()ed identifier from the Python side of things. Sadly, this doesn't influence the output in lldb or the VSCode debugger extension that uses lldb under the covers, but it at least means debug prints are a little more useful. Differential Revision: https://phab.mercurial-scm.org/D12608

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revlog.cc
61 lines | 1.6 KiB | text/x-c | CppLexer
#include <Python.h>
#include <assert.h>
#include <stdlib.h>
#include <unistd.h>
#include <string>
#include "pyutil.h"
extern "C" {
static PYCODETYPE *code;
extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv)
{
contrib::initpy(*argv[0]);
code = (PYCODETYPE *)Py_CompileString(R"py(
for inline in (True, False):
try:
index, cache = parsers.parse_index2(data, inline)
index.slicechunktodensity(list(range(len(index))), 0.5, 262144)
index.stats()
index.findsnapshots({}, 0)
10 in index
for rev in range(len(index)):
index.reachableroots(0, [len(index)-1], [rev])
node = index[rev][7]
partial = index.shortest(node)
index.partialmatch(node[:partial])
index.deltachain(rev, None, True)
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);
return 0;
}
int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
{
// Don't allow fuzzer inputs larger than 60k, since we'll just bog
// down and not accomplish much.
if (Size > 60000) {
return 0;
}
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.
}
}