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c2627d6eea
This PR adds the ability to enable the GIL if it was disabled at interpreter startup, and modifies the multi-phase module initialization path to enable the GIL when loading a module, unless that module's spec includes a slot indicating it can run safely without the GIL. PEP 703 called the constant for the slot `Py_mod_gil_not_used`; I went with `Py_MOD_GIL_NOT_USED` for consistency with gh-104148. A warning will be issued up to once per interpreter for the first GIL-using module that is loaded. If `-v` is given, a shorter message will be printed to stderr every time a GIL-using module is loaded (including the first one that issues a warning).
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
#include <Python.h>
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#include <stdlib.h>
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#include <inttypes.h>
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int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
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static PyObject* _fuzz_run(PyObject* self, PyObject* args) {
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const char* buf;
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Py_ssize_t size;
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if (!PyArg_ParseTuple(args, "s#", &buf, &size)) {
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return NULL;
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}
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int rv = LLVMFuzzerTestOneInput((const uint8_t*)buf, size);
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if (PyErr_Occurred()) {
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return NULL;
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}
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if (rv != 0) {
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// Nonzero return codes are reserved for future use.
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PyErr_Format(
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PyExc_RuntimeError, "Nonzero return code from fuzzer: %d", rv);
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return NULL;
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}
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Py_RETURN_NONE;
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}
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static PyMethodDef module_methods[] = {
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{"run", (PyCFunction)_fuzz_run, METH_VARARGS, ""},
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{NULL},
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};
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static PyModuleDef_Slot module_slots[] = {
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{Py_mod_gil, Py_MOD_GIL_NOT_USED},
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{0, NULL},
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};
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static struct PyModuleDef _fuzzmodule = {
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PyModuleDef_HEAD_INIT,
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"_fuzz",
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NULL,
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0,
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module_methods,
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module_slots,
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NULL,
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NULL,
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NULL
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};
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PyMODINIT_FUNC
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PyInit__xxtestfuzz(void)
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{
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return PyModuleDef_Init(&_fuzzmodule);
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}
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