mirror of
https://github.com/python/cpython
synced 2024-09-05 16:38:56 +00:00
2303 lines
61 KiB
C
2303 lines
61 KiB
C
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/* Generic object operations; and implementation of None */
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#include "Python.h"
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#include "pycore_ceval.h" // _Py_EnterRecursiveCall()
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#include "pycore_context.h"
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#include "pycore_initconfig.h"
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#include "pycore_object.h"
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#include "pycore_pyerrors.h"
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#include "pycore_pylifecycle.h"
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#include "pycore_pymem.h" // _PyMem_IsPtrFreed()
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#include "pycore_pystate.h" // _PyThreadState_GET()
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#include "pycore_symtable.h" // PySTEntry_Type
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#include "pycore_unionobject.h" // _PyUnion_Type
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#include "frameobject.h"
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#include "interpreteridobject.h"
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#ifdef Py_LIMITED_API
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// Prevent recursive call _Py_IncRef() <=> Py_INCREF()
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# error "Py_LIMITED_API macro must not be defined"
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Defined in tracemalloc.c */
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extern void _PyMem_DumpTraceback(int fd, const void *ptr);
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_Py_IDENTIFIER(Py_Repr);
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_Py_IDENTIFIER(__bytes__);
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_Py_IDENTIFIER(__dir__);
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_Py_IDENTIFIER(__isabstractmethod__);
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int
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_PyObject_CheckConsistency(PyObject *op, int check_content)
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{
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#define CHECK(expr) \
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do { if (!(expr)) { _PyObject_ASSERT_FAILED_MSG(op, Py_STRINGIFY(expr)); } } while (0)
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CHECK(!_PyObject_IsFreed(op));
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CHECK(Py_REFCNT(op) >= 1);
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_PyType_CheckConsistency(Py_TYPE(op));
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if (PyUnicode_Check(op)) {
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_PyUnicode_CheckConsistency(op, check_content);
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}
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else if (PyDict_Check(op)) {
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_PyDict_CheckConsistency(op, check_content);
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}
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return 1;
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#undef CHECK
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}
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#ifdef Py_REF_DEBUG
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Py_ssize_t _Py_RefTotal;
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Py_ssize_t
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_Py_GetRefTotal(void)
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{
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PyObject *o;
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Py_ssize_t total = _Py_RefTotal;
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o = _PySet_Dummy;
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if (o != NULL)
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total -= Py_REFCNT(o);
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return total;
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}
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void
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_PyDebug_PrintTotalRefs(void) {
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fprintf(stderr,
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"[%zd refs, %zd blocks]\n",
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_Py_GetRefTotal(), _Py_GetAllocatedBlocks());
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}
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#endif /* Py_REF_DEBUG */
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/* Object allocation routines used by NEWOBJ and NEWVAROBJ macros.
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These are used by the individual routines for object creation.
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Do not call them otherwise, they do not initialize the object! */
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#ifdef Py_TRACE_REFS
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/* Head of circular doubly-linked list of all objects. These are linked
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* together via the _ob_prev and _ob_next members of a PyObject, which
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* exist only in a Py_TRACE_REFS build.
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*/
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static PyObject refchain = {&refchain, &refchain};
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/* Insert op at the front of the list of all objects. If force is true,
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* op is added even if _ob_prev and _ob_next are non-NULL already. If
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* force is false amd _ob_prev or _ob_next are non-NULL, do nothing.
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* force should be true if and only if op points to freshly allocated,
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* uninitialized memory, or you've unlinked op from the list and are
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* relinking it into the front.
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* Note that objects are normally added to the list via _Py_NewReference,
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* which is called by PyObject_Init. Not all objects are initialized that
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* way, though; exceptions include statically allocated type objects, and
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* statically allocated singletons (like Py_True and Py_None).
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*/
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void
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_Py_AddToAllObjects(PyObject *op, int force)
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{
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#ifdef Py_DEBUG
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if (!force) {
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/* If it's initialized memory, op must be in or out of
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* the list unambiguously.
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*/
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_PyObject_ASSERT(op, (op->_ob_prev == NULL) == (op->_ob_next == NULL));
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}
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#endif
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if (force || op->_ob_prev == NULL) {
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op->_ob_next = refchain._ob_next;
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op->_ob_prev = &refchain;
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refchain._ob_next->_ob_prev = op;
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refchain._ob_next = op;
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}
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}
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#endif /* Py_TRACE_REFS */
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#ifdef Py_REF_DEBUG
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/* Log a fatal error; doesn't return. */
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void
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_Py_NegativeRefcount(const char *filename, int lineno, PyObject *op)
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{
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_PyObject_AssertFailed(op, NULL, "object has negative ref count",
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filename, lineno, __func__);
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}
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#endif /* Py_REF_DEBUG */
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void
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Py_IncRef(PyObject *o)
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{
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Py_XINCREF(o);
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}
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void
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Py_DecRef(PyObject *o)
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{
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Py_XDECREF(o);
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}
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void
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_Py_IncRef(PyObject *o)
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{
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Py_INCREF(o);
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}
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void
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_Py_DecRef(PyObject *o)
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{
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Py_DECREF(o);
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}
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PyObject *
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PyObject_Init(PyObject *op, PyTypeObject *tp)
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{
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if (op == NULL) {
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return PyErr_NoMemory();
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}
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_PyObject_Init(op, tp);
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return op;
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}
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PyVarObject *
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PyObject_InitVar(PyVarObject *op, PyTypeObject *tp, Py_ssize_t size)
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{
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if (op == NULL) {
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return (PyVarObject *) PyErr_NoMemory();
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}
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_PyObject_InitVar(op, tp, size);
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return op;
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}
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PyObject *
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_PyObject_New(PyTypeObject *tp)
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{
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PyObject *op = (PyObject *) PyObject_Malloc(_PyObject_SIZE(tp));
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if (op == NULL) {
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return PyErr_NoMemory();
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}
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_PyObject_Init(op, tp);
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return op;
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}
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PyVarObject *
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_PyObject_NewVar(PyTypeObject *tp, Py_ssize_t nitems)
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{
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PyVarObject *op;
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const size_t size = _PyObject_VAR_SIZE(tp, nitems);
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op = (PyVarObject *) PyObject_Malloc(size);
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if (op == NULL) {
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return (PyVarObject *)PyErr_NoMemory();
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}
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_PyObject_InitVar(op, tp, nitems);
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return op;
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}
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void
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PyObject_CallFinalizer(PyObject *self)
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{
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PyTypeObject *tp = Py_TYPE(self);
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if (tp->tp_finalize == NULL)
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return;
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/* tp_finalize should only be called once. */
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if (_PyType_IS_GC(tp) && _PyGC_FINALIZED(self))
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return;
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tp->tp_finalize(self);
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if (_PyType_IS_GC(tp)) {
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_PyGC_SET_FINALIZED(self);
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}
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}
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int
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PyObject_CallFinalizerFromDealloc(PyObject *self)
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{
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if (Py_REFCNT(self) != 0) {
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_PyObject_ASSERT_FAILED_MSG(self,
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"PyObject_CallFinalizerFromDealloc called "
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"on object with a non-zero refcount");
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}
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/* Temporarily resurrect the object. */
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Py_SET_REFCNT(self, 1);
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PyObject_CallFinalizer(self);
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_PyObject_ASSERT_WITH_MSG(self,
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Py_REFCNT(self) > 0,
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"refcount is too small");
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/* Undo the temporary resurrection; can't use DECREF here, it would
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* cause a recursive call. */
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Py_SET_REFCNT(self, Py_REFCNT(self) - 1);
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if (Py_REFCNT(self) == 0) {
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return 0; /* this is the normal path out */
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}
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/* tp_finalize resurrected it! Make it look like the original Py_DECREF
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* never happened. */
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Py_ssize_t refcnt = Py_REFCNT(self);
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_Py_NewReference(self);
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Py_SET_REFCNT(self, refcnt);
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_PyObject_ASSERT(self,
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(!_PyType_IS_GC(Py_TYPE(self))
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|| _PyObject_GC_IS_TRACKED(self)));
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/* If Py_REF_DEBUG macro is defined, _Py_NewReference() increased
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_Py_RefTotal, so we need to undo that. */
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#ifdef Py_REF_DEBUG
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_Py_RefTotal--;
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#endif
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return -1;
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}
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int
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PyObject_Print(PyObject *op, FILE *fp, int flags)
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{
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int ret = 0;
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if (PyErr_CheckSignals())
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return -1;
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#ifdef USE_STACKCHECK
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if (PyOS_CheckStack()) {
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PyErr_SetString(PyExc_MemoryError, "stack overflow");
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return -1;
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}
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#endif
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clearerr(fp); /* Clear any previous error condition */
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if (op == NULL) {
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Py_BEGIN_ALLOW_THREADS
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fprintf(fp, "<nil>");
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Py_END_ALLOW_THREADS
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}
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else {
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if (Py_REFCNT(op) <= 0) {
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/* XXX(twouters) cast refcount to long until %zd is
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universally available */
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Py_BEGIN_ALLOW_THREADS
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fprintf(fp, "<refcnt %ld at %p>",
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(long)Py_REFCNT(op), (void *)op);
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Py_END_ALLOW_THREADS
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}
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else {
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PyObject *s;
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if (flags & Py_PRINT_RAW)
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s = PyObject_Str(op);
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else
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s = PyObject_Repr(op);
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if (s == NULL)
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ret = -1;
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else if (PyBytes_Check(s)) {
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fwrite(PyBytes_AS_STRING(s), 1,
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PyBytes_GET_SIZE(s), fp);
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}
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else if (PyUnicode_Check(s)) {
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PyObject *t;
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t = PyUnicode_AsEncodedString(s, "utf-8", "backslashreplace");
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if (t == NULL) {
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ret = -1;
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}
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else {
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fwrite(PyBytes_AS_STRING(t), 1,
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PyBytes_GET_SIZE(t), fp);
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Py_DECREF(t);
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}
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}
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else {
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PyErr_Format(PyExc_TypeError,
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"str() or repr() returned '%.100s'",
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Py_TYPE(s)->tp_name);
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ret = -1;
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}
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Py_XDECREF(s);
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}
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}
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if (ret == 0) {
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if (ferror(fp)) {
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PyErr_SetFromErrno(PyExc_OSError);
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clearerr(fp);
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ret = -1;
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}
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}
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return ret;
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}
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/* For debugging convenience. Set a breakpoint here and call it from your DLL */
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void
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_Py_BreakPoint(void)
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{
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}
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/* Heuristic checking if the object memory is uninitialized or deallocated.
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Rely on the debug hooks on Python memory allocators:
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see _PyMem_IsPtrFreed().
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The function can be used to prevent segmentation fault on dereferencing
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pointers like 0xDDDDDDDDDDDDDDDD. */
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int
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_PyObject_IsFreed(PyObject *op)
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{
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if (_PyMem_IsPtrFreed(op) || _PyMem_IsPtrFreed(Py_TYPE(op))) {
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return 1;
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}
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/* ignore op->ob_ref: its value can have be modified
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by Py_INCREF() and Py_DECREF(). */
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#ifdef Py_TRACE_REFS
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if (op->_ob_next != NULL && _PyMem_IsPtrFreed(op->_ob_next)) {
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return 1;
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}
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if (op->_ob_prev != NULL && _PyMem_IsPtrFreed(op->_ob_prev)) {
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return 1;
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}
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#endif
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return 0;
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}
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/* For debugging convenience. See Misc/gdbinit for some useful gdb hooks */
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void
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_PyObject_Dump(PyObject* op)
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{
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if (_PyObject_IsFreed(op)) {
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/* It seems like the object memory has been freed:
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don't access it to prevent a segmentation fault. */
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fprintf(stderr, "<object at %p is freed>\n", op);
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fflush(stderr);
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return;
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}
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/* first, write fields which are the least likely to crash */
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fprintf(stderr, "object address : %p\n", (void *)op);
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/* XXX(twouters) cast refcount to long until %zd is
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universally available */
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fprintf(stderr, "object refcount : %ld\n", (long)Py_REFCNT(op));
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fflush(stderr);
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PyTypeObject *type = Py_TYPE(op);
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fprintf(stderr, "object type : %p\n", type);
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fprintf(stderr, "object type name: %s\n",
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type==NULL ? "NULL" : type->tp_name);
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/* the most dangerous part */
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fprintf(stderr, "object repr : ");
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fflush(stderr);
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PyGILState_STATE gil = PyGILState_Ensure();
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PyObject *error_type, *error_value, *error_traceback;
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PyErr_Fetch(&error_type, &error_value, &error_traceback);
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(void)PyObject_Print(op, stderr, 0);
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fflush(stderr);
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PyErr_Restore(error_type, error_value, error_traceback);
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PyGILState_Release(gil);
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fprintf(stderr, "\n");
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fflush(stderr);
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}
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PyObject *
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PyObject_Repr(PyObject *v)
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{
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PyObject *res;
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if (PyErr_CheckSignals())
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return NULL;
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#ifdef USE_STACKCHECK
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if (PyOS_CheckStack()) {
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PyErr_SetString(PyExc_MemoryError, "stack overflow");
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return NULL;
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}
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#endif
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if (v == NULL)
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return PyUnicode_FromString("<NULL>");
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if (Py_TYPE(v)->tp_repr == NULL)
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return PyUnicode_FromFormat("<%s object at %p>",
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Py_TYPE(v)->tp_name, v);
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PyThreadState *tstate = _PyThreadState_GET();
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#ifdef Py_DEBUG
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/* PyObject_Repr() must not be called with an exception set,
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because it can clear it (directly or indirectly) and so the
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caller loses its exception */
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assert(!_PyErr_Occurred(tstate));
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#endif
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/* It is possible for a type to have a tp_repr representation that loops
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infinitely. */
|
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if (_Py_EnterRecursiveCall(tstate,
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" while getting the repr of an object")) {
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return NULL;
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}
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res = (*Py_TYPE(v)->tp_repr)(v);
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_Py_LeaveRecursiveCall(tstate);
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if (res == NULL) {
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return NULL;
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}
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if (!PyUnicode_Check(res)) {
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_PyErr_Format(tstate, PyExc_TypeError,
|
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"__repr__ returned non-string (type %.200s)",
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Py_TYPE(res)->tp_name);
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Py_DECREF(res);
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return NULL;
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}
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#ifndef Py_DEBUG
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if (PyUnicode_READY(res) < 0) {
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return NULL;
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}
|
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#endif
|
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return res;
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}
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PyObject *
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PyObject_Str(PyObject *v)
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{
|
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PyObject *res;
|
|
if (PyErr_CheckSignals())
|
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return NULL;
|
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#ifdef USE_STACKCHECK
|
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if (PyOS_CheckStack()) {
|
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PyErr_SetString(PyExc_MemoryError, "stack overflow");
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return NULL;
|
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}
|
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#endif
|
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if (v == NULL)
|
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return PyUnicode_FromString("<NULL>");
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if (PyUnicode_CheckExact(v)) {
|
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#ifndef Py_DEBUG
|
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if (PyUnicode_READY(v) < 0)
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return NULL;
|
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#endif
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Py_INCREF(v);
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return v;
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}
|
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if (Py_TYPE(v)->tp_str == NULL)
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return PyObject_Repr(v);
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|
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PyThreadState *tstate = _PyThreadState_GET();
|
|
#ifdef Py_DEBUG
|
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/* PyObject_Str() must not be called with an exception set,
|
|
because it can clear it (directly or indirectly) and so the
|
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caller loses its exception */
|
|
assert(!_PyErr_Occurred(tstate));
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#endif
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/* It is possible for a type to have a tp_str representation that loops
|
|
infinitely. */
|
|
if (_Py_EnterRecursiveCall(tstate, " while getting the str of an object")) {
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return NULL;
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}
|
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res = (*Py_TYPE(v)->tp_str)(v);
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_Py_LeaveRecursiveCall(tstate);
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if (res == NULL) {
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return NULL;
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}
|
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if (!PyUnicode_Check(res)) {
|
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_PyErr_Format(tstate, PyExc_TypeError,
|
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"__str__ returned non-string (type %.200s)",
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Py_TYPE(res)->tp_name);
|
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Py_DECREF(res);
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return NULL;
|
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}
|
|
#ifndef Py_DEBUG
|
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if (PyUnicode_READY(res) < 0) {
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return NULL;
|
|
}
|
|
#endif
|
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assert(_PyUnicode_CheckConsistency(res, 1));
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return res;
|
|
}
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|
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PyObject *
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PyObject_ASCII(PyObject *v)
|
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{
|
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PyObject *repr, *ascii, *res;
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|
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repr = PyObject_Repr(v);
|
|
if (repr == NULL)
|
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return NULL;
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|
|
if (PyUnicode_IS_ASCII(repr))
|
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return repr;
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|
|
/* repr is guaranteed to be a PyUnicode object by PyObject_Repr */
|
|
ascii = _PyUnicode_AsASCIIString(repr, "backslashreplace");
|
|
Py_DECREF(repr);
|
|
if (ascii == NULL)
|
|
return NULL;
|
|
|
|
res = PyUnicode_DecodeASCII(
|
|
PyBytes_AS_STRING(ascii),
|
|
PyBytes_GET_SIZE(ascii),
|
|
NULL);
|
|
|
|
Py_DECREF(ascii);
|
|
return res;
|
|
}
|
|
|
|
PyObject *
|
|
PyObject_Bytes(PyObject *v)
|
|
{
|
|
PyObject *result, *func;
|
|
|
|
if (v == NULL)
|
|
return PyBytes_FromString("<NULL>");
|
|
|
|
if (PyBytes_CheckExact(v)) {
|
|
Py_INCREF(v);
|
|
return v;
|
|
}
|
|
|
|
func = _PyObject_LookupSpecial(v, &PyId___bytes__);
|
|
if (func != NULL) {
|
|
result = _PyObject_CallNoArg(func);
|
|
Py_DECREF(func);
|
|
if (result == NULL)
|
|
return NULL;
|
|
if (!PyBytes_Check(result)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"__bytes__ returned non-bytes (type %.200s)",
|
|
Py_TYPE(result)->tp_name);
|
|
Py_DECREF(result);
|
|
return NULL;
|
|
}
|
|
return result;
|
|
}
|
|
else if (PyErr_Occurred())
|
|
return NULL;
|
|
return PyBytes_FromObject(v);
|
|
}
|
|
|
|
|
|
/*
|
|
def _PyObject_FunctionStr(x):
|
|
try:
|
|
qualname = x.__qualname__
|
|
except AttributeError:
|
|
return str(x)
|
|
try:
|
|
mod = x.__module__
|
|
if mod is not None and mod != 'builtins':
|
|
return f"{x.__module__}.{qualname}()"
|
|
except AttributeError:
|
|
pass
|
|
return qualname
|
|
*/
|
|
PyObject *
|
|
_PyObject_FunctionStr(PyObject *x)
|
|
{
|
|
_Py_IDENTIFIER(__module__);
|
|
_Py_IDENTIFIER(__qualname__);
|
|
_Py_IDENTIFIER(builtins);
|
|
assert(!PyErr_Occurred());
|
|
PyObject *qualname;
|
|
int ret = _PyObject_LookupAttrId(x, &PyId___qualname__, &qualname);
|
|
if (qualname == NULL) {
|
|
if (ret < 0) {
|
|
return NULL;
|
|
}
|
|
return PyObject_Str(x);
|
|
}
|
|
PyObject *module;
|
|
PyObject *result = NULL;
|
|
ret = _PyObject_LookupAttrId(x, &PyId___module__, &module);
|
|
if (module != NULL && module != Py_None) {
|
|
PyObject *builtinsname = _PyUnicode_FromId(&PyId_builtins);
|
|
if (builtinsname == NULL) {
|
|
goto done;
|
|
}
|
|
ret = PyObject_RichCompareBool(module, builtinsname, Py_NE);
|
|
if (ret < 0) {
|
|
// error
|
|
goto done;
|
|
}
|
|
if (ret > 0) {
|
|
result = PyUnicode_FromFormat("%S.%S()", module, qualname);
|
|
goto done;
|
|
}
|
|
}
|
|
else if (ret < 0) {
|
|
goto done;
|
|
}
|
|
result = PyUnicode_FromFormat("%S()", qualname);
|
|
done:
|
|
Py_DECREF(qualname);
|
|
Py_XDECREF(module);
|
|
return result;
|
|
}
|
|
|
|
/* For Python 3.0.1 and later, the old three-way comparison has been
|
|
completely removed in favour of rich comparisons. PyObject_Compare() and
|
|
PyObject_Cmp() are gone, and the builtin cmp function no longer exists.
|
|
The old tp_compare slot has been renamed to tp_as_async, and should no
|
|
longer be used. Use tp_richcompare instead.
|
|
|
|
See (*) below for practical amendments.
|
|
|
|
tp_richcompare gets called with a first argument of the appropriate type
|
|
and a second object of an arbitrary type. We never do any kind of
|
|
coercion.
|
|
|
|
The tp_richcompare slot should return an object, as follows:
|
|
|
|
NULL if an exception occurred
|
|
NotImplemented if the requested comparison is not implemented
|
|
any other false value if the requested comparison is false
|
|
any other true value if the requested comparison is true
|
|
|
|
The PyObject_RichCompare[Bool]() wrappers raise TypeError when they get
|
|
NotImplemented.
|
|
|
|
(*) Practical amendments:
|
|
|
|
- If rich comparison returns NotImplemented, == and != are decided by
|
|
comparing the object pointer (i.e. falling back to the base object
|
|
implementation).
|
|
|
|
*/
|
|
|
|
/* Map rich comparison operators to their swapped version, e.g. LT <--> GT */
|
|
int _Py_SwappedOp[] = {Py_GT, Py_GE, Py_EQ, Py_NE, Py_LT, Py_LE};
|
|
|
|
static const char * const opstrings[] = {"<", "<=", "==", "!=", ">", ">="};
|
|
|
|
/* Perform a rich comparison, raising TypeError when the requested comparison
|
|
operator is not supported. */
|
|
static PyObject *
|
|
do_richcompare(PyThreadState *tstate, PyObject *v, PyObject *w, int op)
|
|
{
|
|
richcmpfunc f;
|
|
PyObject *res;
|
|
int checked_reverse_op = 0;
|
|
|
|
if (!Py_IS_TYPE(v, Py_TYPE(w)) &&
|
|
PyType_IsSubtype(Py_TYPE(w), Py_TYPE(v)) &&
|
|
(f = Py_TYPE(w)->tp_richcompare) != NULL) {
|
|
checked_reverse_op = 1;
|
|
res = (*f)(w, v, _Py_SwappedOp[op]);
|
|
if (res != Py_NotImplemented)
|
|
return res;
|
|
Py_DECREF(res);
|
|
}
|
|
if ((f = Py_TYPE(v)->tp_richcompare) != NULL) {
|
|
res = (*f)(v, w, op);
|
|
if (res != Py_NotImplemented)
|
|
return res;
|
|
Py_DECREF(res);
|
|
}
|
|
if (!checked_reverse_op && (f = Py_TYPE(w)->tp_richcompare) != NULL) {
|
|
res = (*f)(w, v, _Py_SwappedOp[op]);
|
|
if (res != Py_NotImplemented)
|
|
return res;
|
|
Py_DECREF(res);
|
|
}
|
|
/* If neither object implements it, provide a sensible default
|
|
for == and !=, but raise an exception for ordering. */
|
|
switch (op) {
|
|
case Py_EQ:
|
|
res = (v == w) ? Py_True : Py_False;
|
|
break;
|
|
case Py_NE:
|
|
res = (v != w) ? Py_True : Py_False;
|
|
break;
|
|
default:
|
|
_PyErr_Format(tstate, PyExc_TypeError,
|
|
"'%s' not supported between instances of '%.100s' and '%.100s'",
|
|
opstrings[op],
|
|
Py_TYPE(v)->tp_name,
|
|
Py_TYPE(w)->tp_name);
|
|
return NULL;
|
|
}
|
|
Py_INCREF(res);
|
|
return res;
|
|
}
|
|
|
|
/* Perform a rich comparison with object result. This wraps do_richcompare()
|
|
with a check for NULL arguments and a recursion check. */
|
|
|
|
PyObject *
|
|
PyObject_RichCompare(PyObject *v, PyObject *w, int op)
|
|
{
|
|
PyThreadState *tstate = _PyThreadState_GET();
|
|
|
|
assert(Py_LT <= op && op <= Py_GE);
|
|
if (v == NULL || w == NULL) {
|
|
if (!_PyErr_Occurred(tstate)) {
|
|
PyErr_BadInternalCall();
|
|
}
|
|
return NULL;
|
|
}
|
|
if (_Py_EnterRecursiveCall(tstate, " in comparison")) {
|
|
return NULL;
|
|
}
|
|
PyObject *res = do_richcompare(tstate, v, w, op);
|
|
_Py_LeaveRecursiveCall(tstate);
|
|
return res;
|
|
}
|
|
|
|
/* Perform a rich comparison with integer result. This wraps
|
|
PyObject_RichCompare(), returning -1 for error, 0 for false, 1 for true. */
|
|
int
|
|
PyObject_RichCompareBool(PyObject *v, PyObject *w, int op)
|
|
{
|
|
PyObject *res;
|
|
int ok;
|
|
|
|
/* Quick result when objects are the same.
|
|
Guarantees that identity implies equality. */
|
|
if (v == w) {
|
|
if (op == Py_EQ)
|
|
return 1;
|
|
else if (op == Py_NE)
|
|
return 0;
|
|
}
|
|
|
|
res = PyObject_RichCompare(v, w, op);
|
|
if (res == NULL)
|
|
return -1;
|
|
if (PyBool_Check(res))
|
|
ok = (res == Py_True);
|
|
else
|
|
ok = PyObject_IsTrue(res);
|
|
Py_DECREF(res);
|
|
return ok;
|
|
}
|
|
|
|
Py_hash_t
|
|
PyObject_HashNotImplemented(PyObject *v)
|
|
{
|
|
PyErr_Format(PyExc_TypeError, "unhashable type: '%.200s'",
|
|
Py_TYPE(v)->tp_name);
|
|
return -1;
|
|
}
|
|
|
|
Py_hash_t
|
|
PyObject_Hash(PyObject *v)
|
|
{
|
|
PyTypeObject *tp = Py_TYPE(v);
|
|
if (tp->tp_hash != NULL)
|
|
return (*tp->tp_hash)(v);
|
|
/* To keep to the general practice that inheriting
|
|
* solely from object in C code should work without
|
|
* an explicit call to PyType_Ready, we implicitly call
|
|
* PyType_Ready here and then check the tp_hash slot again
|
|
*/
|
|
if (tp->tp_dict == NULL) {
|
|
if (PyType_Ready(tp) < 0)
|
|
return -1;
|
|
if (tp->tp_hash != NULL)
|
|
return (*tp->tp_hash)(v);
|
|
}
|
|
/* Otherwise, the object can't be hashed */
|
|
return PyObject_HashNotImplemented(v);
|
|
}
|
|
|
|
PyObject *
|
|
PyObject_GetAttrString(PyObject *v, const char *name)
|
|
{
|
|
PyObject *w, *res;
|
|
|
|
if (Py_TYPE(v)->tp_getattr != NULL)
|
|
return (*Py_TYPE(v)->tp_getattr)(v, (char*)name);
|
|
w = PyUnicode_FromString(name);
|
|
if (w == NULL)
|
|
return NULL;
|
|
res = PyObject_GetAttr(v, w);
|
|
Py_DECREF(w);
|
|
return res;
|
|
}
|
|
|
|
int
|
|
PyObject_HasAttrString(PyObject *v, const char *name)
|
|
{
|
|
PyObject *res = PyObject_GetAttrString(v, name);
|
|
if (res != NULL) {
|
|
Py_DECREF(res);
|
|
return 1;
|
|
}
|
|
PyErr_Clear();
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
PyObject_SetAttrString(PyObject *v, const char *name, PyObject *w)
|
|
{
|
|
PyObject *s;
|
|
int res;
|
|
|
|
if (Py_TYPE(v)->tp_setattr != NULL)
|
|
return (*Py_TYPE(v)->tp_setattr)(v, (char*)name, w);
|
|
s = PyUnicode_InternFromString(name);
|
|
if (s == NULL)
|
|
return -1;
|
|
res = PyObject_SetAttr(v, s, w);
|
|
Py_XDECREF(s);
|
|
return res;
|
|
}
|
|
|
|
int
|
|
_PyObject_IsAbstract(PyObject *obj)
|
|
{
|
|
int res;
|
|
PyObject* isabstract;
|
|
|
|
if (obj == NULL)
|
|
return 0;
|
|
|
|
res = _PyObject_LookupAttrId(obj, &PyId___isabstractmethod__, &isabstract);
|
|
if (res > 0) {
|
|
res = PyObject_IsTrue(isabstract);
|
|
Py_DECREF(isabstract);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
PyObject *
|
|
_PyObject_GetAttrId(PyObject *v, _Py_Identifier *name)
|
|
{
|
|
PyObject *result;
|
|
PyObject *oname = _PyUnicode_FromId(name); /* borrowed */
|
|
if (!oname)
|
|
return NULL;
|
|
result = PyObject_GetAttr(v, oname);
|
|
return result;
|
|
}
|
|
|
|
int
|
|
_PyObject_SetAttrId(PyObject *v, _Py_Identifier *name, PyObject *w)
|
|
{
|
|
int result;
|
|
PyObject *oname = _PyUnicode_FromId(name); /* borrowed */
|
|
if (!oname)
|
|
return -1;
|
|
result = PyObject_SetAttr(v, oname, w);
|
|
return result;
|
|
}
|
|
|
|
static inline int
|
|
set_attribute_error_context(PyObject* v, PyObject* name)
|
|
{
|
|
assert(PyErr_Occurred());
|
|
_Py_IDENTIFIER(name);
|
|
_Py_IDENTIFIER(obj);
|
|
// Intercept AttributeError exceptions and augment them to offer
|
|
// suggestions later.
|
|
if (PyErr_ExceptionMatches(PyExc_AttributeError)){
|
|
PyObject *type, *value, *traceback;
|
|
PyErr_Fetch(&type, &value, &traceback);
|
|
PyErr_NormalizeException(&type, &value, &traceback);
|
|
if (PyErr_GivenExceptionMatches(value, PyExc_AttributeError) &&
|
|
(_PyObject_SetAttrId(value, &PyId_name, name) ||
|
|
_PyObject_SetAttrId(value, &PyId_obj, v))) {
|
|
return 1;
|
|
}
|
|
PyErr_Restore(type, value, traceback);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
PyObject *
|
|
PyObject_GetAttr(PyObject *v, PyObject *name)
|
|
{
|
|
PyTypeObject *tp = Py_TYPE(v);
|
|
if (!PyUnicode_Check(name)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"attribute name must be string, not '%.200s'",
|
|
Py_TYPE(name)->tp_name);
|
|
return NULL;
|
|
}
|
|
|
|
PyObject* result = NULL;
|
|
if (tp->tp_getattro != NULL) {
|
|
result = (*tp->tp_getattro)(v, name);
|
|
}
|
|
else if (tp->tp_getattr != NULL) {
|
|
const char *name_str = PyUnicode_AsUTF8(name);
|
|
if (name_str == NULL) {
|
|
return NULL;
|
|
}
|
|
result = (*tp->tp_getattr)(v, (char *)name_str);
|
|
}
|
|
else {
|
|
PyErr_Format(PyExc_AttributeError,
|
|
"'%.50s' object has no attribute '%U'",
|
|
tp->tp_name, name);
|
|
}
|
|
|
|
if (result == NULL) {
|
|
set_attribute_error_context(v, name);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
int
|
|
_PyObject_LookupAttr(PyObject *v, PyObject *name, PyObject **result)
|
|
{
|
|
PyTypeObject *tp = Py_TYPE(v);
|
|
|
|
if (!PyUnicode_Check(name)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"attribute name must be string, not '%.200s'",
|
|
Py_TYPE(name)->tp_name);
|
|
*result = NULL;
|
|
return -1;
|
|
}
|
|
|
|
if (tp->tp_getattro == PyObject_GenericGetAttr) {
|
|
*result = _PyObject_GenericGetAttrWithDict(v, name, NULL, 1);
|
|
if (*result != NULL) {
|
|
return 1;
|
|
}
|
|
if (PyErr_Occurred()) {
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
if (tp->tp_getattro != NULL) {
|
|
*result = (*tp->tp_getattro)(v, name);
|
|
}
|
|
else if (tp->tp_getattr != NULL) {
|
|
const char *name_str = PyUnicode_AsUTF8(name);
|
|
if (name_str == NULL) {
|
|
*result = NULL;
|
|
return -1;
|
|
}
|
|
*result = (*tp->tp_getattr)(v, (char *)name_str);
|
|
}
|
|
else {
|
|
*result = NULL;
|
|
return 0;
|
|
}
|
|
|
|
if (*result != NULL) {
|
|
return 1;
|
|
}
|
|
if (!PyErr_ExceptionMatches(PyExc_AttributeError)) {
|
|
return -1;
|
|
}
|
|
PyErr_Clear();
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
_PyObject_LookupAttrId(PyObject *v, _Py_Identifier *name, PyObject **result)
|
|
{
|
|
PyObject *oname = _PyUnicode_FromId(name); /* borrowed */
|
|
if (!oname) {
|
|
*result = NULL;
|
|
return -1;
|
|
}
|
|
return _PyObject_LookupAttr(v, oname, result);
|
|
}
|
|
|
|
int
|
|
PyObject_HasAttr(PyObject *v, PyObject *name)
|
|
{
|
|
PyObject *res;
|
|
if (_PyObject_LookupAttr(v, name, &res) < 0) {
|
|
PyErr_Clear();
|
|
return 0;
|
|
}
|
|
if (res == NULL) {
|
|
return 0;
|
|
}
|
|
Py_DECREF(res);
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
PyObject_SetAttr(PyObject *v, PyObject *name, PyObject *value)
|
|
{
|
|
PyTypeObject *tp = Py_TYPE(v);
|
|
int err;
|
|
|
|
if (!PyUnicode_Check(name)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"attribute name must be string, not '%.200s'",
|
|
Py_TYPE(name)->tp_name);
|
|
return -1;
|
|
}
|
|
Py_INCREF(name);
|
|
|
|
PyUnicode_InternInPlace(&name);
|
|
if (tp->tp_setattro != NULL) {
|
|
err = (*tp->tp_setattro)(v, name, value);
|
|
Py_DECREF(name);
|
|
return err;
|
|
}
|
|
if (tp->tp_setattr != NULL) {
|
|
const char *name_str = PyUnicode_AsUTF8(name);
|
|
if (name_str == NULL) {
|
|
Py_DECREF(name);
|
|
return -1;
|
|
}
|
|
err = (*tp->tp_setattr)(v, (char *)name_str, value);
|
|
Py_DECREF(name);
|
|
return err;
|
|
}
|
|
Py_DECREF(name);
|
|
_PyObject_ASSERT(name, Py_REFCNT(name) >= 1);
|
|
if (tp->tp_getattr == NULL && tp->tp_getattro == NULL)
|
|
PyErr_Format(PyExc_TypeError,
|
|
"'%.100s' object has no attributes "
|
|
"(%s .%U)",
|
|
tp->tp_name,
|
|
value==NULL ? "del" : "assign to",
|
|
name);
|
|
else
|
|
PyErr_Format(PyExc_TypeError,
|
|
"'%.100s' object has only read-only attributes "
|
|
"(%s .%U)",
|
|
tp->tp_name,
|
|
value==NULL ? "del" : "assign to",
|
|
name);
|
|
return -1;
|
|
}
|
|
|
|
/* Helper to get a pointer to an object's __dict__ slot, if any */
|
|
|
|
PyObject **
|
|
_PyObject_GetDictPtr(PyObject *obj)
|
|
{
|
|
Py_ssize_t dictoffset;
|
|
PyTypeObject *tp = Py_TYPE(obj);
|
|
|
|
dictoffset = tp->tp_dictoffset;
|
|
if (dictoffset == 0)
|
|
return NULL;
|
|
if (dictoffset < 0) {
|
|
Py_ssize_t tsize = Py_SIZE(obj);
|
|
if (tsize < 0) {
|
|
tsize = -tsize;
|
|
}
|
|
size_t size = _PyObject_VAR_SIZE(tp, tsize);
|
|
|
|
dictoffset += (long)size;
|
|
_PyObject_ASSERT(obj, dictoffset > 0);
|
|
_PyObject_ASSERT(obj, dictoffset % SIZEOF_VOID_P == 0);
|
|
}
|
|
return (PyObject **) ((char *)obj + dictoffset);
|
|
}
|
|
|
|
PyObject *
|
|
PyObject_SelfIter(PyObject *obj)
|
|
{
|
|
Py_INCREF(obj);
|
|
return obj;
|
|
}
|
|
|
|
/* Helper used when the __next__ method is removed from a type:
|
|
tp_iternext is never NULL and can be safely called without checking
|
|
on every iteration.
|
|
*/
|
|
|
|
PyObject *
|
|
_PyObject_NextNotImplemented(PyObject *self)
|
|
{
|
|
PyErr_Format(PyExc_TypeError,
|
|
"'%.200s' object is not iterable",
|
|
Py_TYPE(self)->tp_name);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/* Specialized version of _PyObject_GenericGetAttrWithDict
|
|
specifically for the LOAD_METHOD opcode.
|
|
|
|
Return 1 if a method is found, 0 if it's a regular attribute
|
|
from __dict__ or something returned by using a descriptor
|
|
protocol.
|
|
|
|
`method` will point to the resolved attribute or NULL. In the
|
|
latter case, an error will be set.
|
|
*/
|
|
int
|
|
_PyObject_GetMethod(PyObject *obj, PyObject *name, PyObject **method)
|
|
{
|
|
int meth_found = 0;
|
|
|
|
assert(*method == NULL);
|
|
|
|
PyTypeObject *tp = Py_TYPE(obj);
|
|
if (!_PyType_IsReady(tp)) {
|
|
if (PyType_Ready(tp) < 0) {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (tp->tp_getattro != PyObject_GenericGetAttr || !PyUnicode_Check(name)) {
|
|
*method = PyObject_GetAttr(obj, name);
|
|
return 0;
|
|
}
|
|
|
|
PyObject *descr = _PyType_Lookup(tp, name);
|
|
descrgetfunc f = NULL;
|
|
if (descr != NULL) {
|
|
Py_INCREF(descr);
|
|
if (_PyType_HasFeature(Py_TYPE(descr), Py_TPFLAGS_METHOD_DESCRIPTOR)) {
|
|
meth_found = 1;
|
|
} else {
|
|
f = Py_TYPE(descr)->tp_descr_get;
|
|
if (f != NULL && PyDescr_IsData(descr)) {
|
|
*method = f(descr, obj, (PyObject *)Py_TYPE(obj));
|
|
Py_DECREF(descr);
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
PyObject **dictptr = _PyObject_GetDictPtr(obj);
|
|
PyObject *dict;
|
|
if (dictptr != NULL && (dict = *dictptr) != NULL) {
|
|
Py_INCREF(dict);
|
|
PyObject *attr = PyDict_GetItemWithError(dict, name);
|
|
if (attr != NULL) {
|
|
*method = Py_NewRef(attr);
|
|
Py_DECREF(dict);
|
|
Py_XDECREF(descr);
|
|
return 0;
|
|
}
|
|
Py_DECREF(dict);
|
|
|
|
if (PyErr_Occurred()) {
|
|
Py_XDECREF(descr);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (meth_found) {
|
|
*method = descr;
|
|
return 1;
|
|
}
|
|
|
|
if (f != NULL) {
|
|
*method = f(descr, obj, (PyObject *)Py_TYPE(obj));
|
|
Py_DECREF(descr);
|
|
return 0;
|
|
}
|
|
|
|
if (descr != NULL) {
|
|
*method = descr;
|
|
return 0;
|
|
}
|
|
|
|
PyErr_Format(PyExc_AttributeError,
|
|
"'%.50s' object has no attribute '%U'",
|
|
tp->tp_name, name);
|
|
|
|
set_attribute_error_context(obj, name);
|
|
return 0;
|
|
}
|
|
|
|
/* Generic GetAttr functions - put these in your tp_[gs]etattro slot. */
|
|
|
|
PyObject *
|
|
_PyObject_GenericGetAttrWithDict(PyObject *obj, PyObject *name,
|
|
PyObject *dict, int suppress)
|
|
{
|
|
/* Make sure the logic of _PyObject_GetMethod is in sync with
|
|
this method.
|
|
|
|
When suppress=1, this function suppresses AttributeError.
|
|
*/
|
|
|
|
PyTypeObject *tp = Py_TYPE(obj);
|
|
PyObject *descr = NULL;
|
|
PyObject *res = NULL;
|
|
descrgetfunc f;
|
|
Py_ssize_t dictoffset;
|
|
PyObject **dictptr;
|
|
|
|
if (!PyUnicode_Check(name)){
|
|
PyErr_Format(PyExc_TypeError,
|
|
"attribute name must be string, not '%.200s'",
|
|
Py_TYPE(name)->tp_name);
|
|
return NULL;
|
|
}
|
|
Py_INCREF(name);
|
|
|
|
if (tp->tp_dict == NULL) {
|
|
if (PyType_Ready(tp) < 0)
|
|
goto done;
|
|
}
|
|
|
|
descr = _PyType_Lookup(tp, name);
|
|
|
|
f = NULL;
|
|
if (descr != NULL) {
|
|
Py_INCREF(descr);
|
|
f = Py_TYPE(descr)->tp_descr_get;
|
|
if (f != NULL && PyDescr_IsData(descr)) {
|
|
res = f(descr, obj, (PyObject *)Py_TYPE(obj));
|
|
if (res == NULL && suppress &&
|
|
PyErr_ExceptionMatches(PyExc_AttributeError)) {
|
|
PyErr_Clear();
|
|
}
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
if (dict == NULL) {
|
|
/* Inline _PyObject_GetDictPtr */
|
|
dictoffset = tp->tp_dictoffset;
|
|
if (dictoffset != 0) {
|
|
if (dictoffset < 0) {
|
|
Py_ssize_t tsize = Py_SIZE(obj);
|
|
if (tsize < 0) {
|
|
tsize = -tsize;
|
|
}
|
|
size_t size = _PyObject_VAR_SIZE(tp, tsize);
|
|
_PyObject_ASSERT(obj, size <= PY_SSIZE_T_MAX);
|
|
|
|
dictoffset += (Py_ssize_t)size;
|
|
_PyObject_ASSERT(obj, dictoffset > 0);
|
|
_PyObject_ASSERT(obj, dictoffset % SIZEOF_VOID_P == 0);
|
|
}
|
|
dictptr = (PyObject **) ((char *)obj + dictoffset);
|
|
dict = *dictptr;
|
|
}
|
|
}
|
|
if (dict != NULL) {
|
|
Py_INCREF(dict);
|
|
res = PyDict_GetItemWithError(dict, name);
|
|
if (res != NULL) {
|
|
Py_INCREF(res);
|
|
Py_DECREF(dict);
|
|
goto done;
|
|
}
|
|
else {
|
|
Py_DECREF(dict);
|
|
if (PyErr_Occurred()) {
|
|
if (suppress && PyErr_ExceptionMatches(PyExc_AttributeError)) {
|
|
PyErr_Clear();
|
|
}
|
|
else {
|
|
goto done;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (f != NULL) {
|
|
res = f(descr, obj, (PyObject *)Py_TYPE(obj));
|
|
if (res == NULL && suppress &&
|
|
PyErr_ExceptionMatches(PyExc_AttributeError)) {
|
|
PyErr_Clear();
|
|
}
|
|
goto done;
|
|
}
|
|
|
|
if (descr != NULL) {
|
|
res = descr;
|
|
descr = NULL;
|
|
goto done;
|
|
}
|
|
|
|
if (!suppress) {
|
|
PyErr_Format(PyExc_AttributeError,
|
|
"'%.50s' object has no attribute '%U'",
|
|
tp->tp_name, name);
|
|
}
|
|
done:
|
|
Py_XDECREF(descr);
|
|
Py_DECREF(name);
|
|
return res;
|
|
}
|
|
|
|
PyObject *
|
|
PyObject_GenericGetAttr(PyObject *obj, PyObject *name)
|
|
{
|
|
return _PyObject_GenericGetAttrWithDict(obj, name, NULL, 0);
|
|
}
|
|
|
|
int
|
|
_PyObject_GenericSetAttrWithDict(PyObject *obj, PyObject *name,
|
|
PyObject *value, PyObject *dict)
|
|
{
|
|
PyTypeObject *tp = Py_TYPE(obj);
|
|
PyObject *descr;
|
|
descrsetfunc f;
|
|
PyObject **dictptr;
|
|
int res = -1;
|
|
|
|
if (!PyUnicode_Check(name)){
|
|
PyErr_Format(PyExc_TypeError,
|
|
"attribute name must be string, not '%.200s'",
|
|
Py_TYPE(name)->tp_name);
|
|
return -1;
|
|
}
|
|
|
|
if (tp->tp_dict == NULL && PyType_Ready(tp) < 0)
|
|
return -1;
|
|
|
|
Py_INCREF(name);
|
|
|
|
descr = _PyType_Lookup(tp, name);
|
|
|
|
if (descr != NULL) {
|
|
Py_INCREF(descr);
|
|
f = Py_TYPE(descr)->tp_descr_set;
|
|
if (f != NULL) {
|
|
res = f(descr, obj, value);
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
/* XXX [Steve Dower] These are really noisy - worth it? */
|
|
/*if (PyType_Check(obj) || PyModule_Check(obj)) {
|
|
if (value && PySys_Audit("object.__setattr__", "OOO", obj, name, value) < 0)
|
|
return -1;
|
|
if (!value && PySys_Audit("object.__delattr__", "OO", obj, name) < 0)
|
|
return -1;
|
|
}*/
|
|
|
|
if (dict == NULL) {
|
|
dictptr = _PyObject_GetDictPtr(obj);
|
|
if (dictptr == NULL) {
|
|
if (descr == NULL) {
|
|
PyErr_Format(PyExc_AttributeError,
|
|
"'%.100s' object has no attribute '%U'",
|
|
tp->tp_name, name);
|
|
}
|
|
else {
|
|
PyErr_Format(PyExc_AttributeError,
|
|
"'%.50s' object attribute '%U' is read-only",
|
|
tp->tp_name, name);
|
|
}
|
|
goto done;
|
|
}
|
|
res = _PyObjectDict_SetItem(tp, dictptr, name, value);
|
|
}
|
|
else {
|
|
Py_INCREF(dict);
|
|
if (value == NULL)
|
|
res = PyDict_DelItem(dict, name);
|
|
else
|
|
res = PyDict_SetItem(dict, name, value);
|
|
Py_DECREF(dict);
|
|
}
|
|
if (res < 0 && PyErr_ExceptionMatches(PyExc_KeyError))
|
|
PyErr_SetObject(PyExc_AttributeError, name);
|
|
|
|
done:
|
|
Py_XDECREF(descr);
|
|
Py_DECREF(name);
|
|
return res;
|
|
}
|
|
|
|
int
|
|
PyObject_GenericSetAttr(PyObject *obj, PyObject *name, PyObject *value)
|
|
{
|
|
return _PyObject_GenericSetAttrWithDict(obj, name, value, NULL);
|
|
}
|
|
|
|
int
|
|
PyObject_GenericSetDict(PyObject *obj, PyObject *value, void *context)
|
|
{
|
|
PyObject **dictptr = _PyObject_GetDictPtr(obj);
|
|
if (dictptr == NULL) {
|
|
PyErr_SetString(PyExc_AttributeError,
|
|
"This object has no __dict__");
|
|
return -1;
|
|
}
|
|
if (value == NULL) {
|
|
PyErr_SetString(PyExc_TypeError, "cannot delete __dict__");
|
|
return -1;
|
|
}
|
|
if (!PyDict_Check(value)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"__dict__ must be set to a dictionary, "
|
|
"not a '%.200s'", Py_TYPE(value)->tp_name);
|
|
return -1;
|
|
}
|
|
Py_INCREF(value);
|
|
Py_XSETREF(*dictptr, value);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Test a value used as condition, e.g., in a while or if statement.
|
|
Return -1 if an error occurred */
|
|
|
|
int
|
|
PyObject_IsTrue(PyObject *v)
|
|
{
|
|
Py_ssize_t res;
|
|
if (v == Py_True)
|
|
return 1;
|
|
if (v == Py_False)
|
|
return 0;
|
|
if (v == Py_None)
|
|
return 0;
|
|
else if (Py_TYPE(v)->tp_as_number != NULL &&
|
|
Py_TYPE(v)->tp_as_number->nb_bool != NULL)
|
|
res = (*Py_TYPE(v)->tp_as_number->nb_bool)(v);
|
|
else if (Py_TYPE(v)->tp_as_mapping != NULL &&
|
|
Py_TYPE(v)->tp_as_mapping->mp_length != NULL)
|
|
res = (*Py_TYPE(v)->tp_as_mapping->mp_length)(v);
|
|
else if (Py_TYPE(v)->tp_as_sequence != NULL &&
|
|
Py_TYPE(v)->tp_as_sequence->sq_length != NULL)
|
|
res = (*Py_TYPE(v)->tp_as_sequence->sq_length)(v);
|
|
else
|
|
return 1;
|
|
/* if it is negative, it should be either -1 or -2 */
|
|
return (res > 0) ? 1 : Py_SAFE_DOWNCAST(res, Py_ssize_t, int);
|
|
}
|
|
|
|
/* equivalent of 'not v'
|
|
Return -1 if an error occurred */
|
|
|
|
int
|
|
PyObject_Not(PyObject *v)
|
|
{
|
|
int res;
|
|
res = PyObject_IsTrue(v);
|
|
if (res < 0)
|
|
return res;
|
|
return res == 0;
|
|
}
|
|
|
|
/* Test whether an object can be called */
|
|
|
|
int
|
|
PyCallable_Check(PyObject *x)
|
|
{
|
|
if (x == NULL)
|
|
return 0;
|
|
return Py_TYPE(x)->tp_call != NULL;
|
|
}
|
|
|
|
|
|
/* Helper for PyObject_Dir without arguments: returns the local scope. */
|
|
static PyObject *
|
|
_dir_locals(void)
|
|
{
|
|
PyObject *names;
|
|
PyObject *locals;
|
|
|
|
locals = PyEval_GetLocals();
|
|
if (locals == NULL)
|
|
return NULL;
|
|
|
|
names = PyMapping_Keys(locals);
|
|
if (!names)
|
|
return NULL;
|
|
if (!PyList_Check(names)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"dir(): expected keys() of locals to be a list, "
|
|
"not '%.200s'", Py_TYPE(names)->tp_name);
|
|
Py_DECREF(names);
|
|
return NULL;
|
|
}
|
|
if (PyList_Sort(names)) {
|
|
Py_DECREF(names);
|
|
return NULL;
|
|
}
|
|
/* the locals don't need to be DECREF'd */
|
|
return names;
|
|
}
|
|
|
|
/* Helper for PyObject_Dir: object introspection. */
|
|
static PyObject *
|
|
_dir_object(PyObject *obj)
|
|
{
|
|
PyObject *result, *sorted;
|
|
PyObject *dirfunc = _PyObject_LookupSpecial(obj, &PyId___dir__);
|
|
|
|
assert(obj != NULL);
|
|
if (dirfunc == NULL) {
|
|
if (!PyErr_Occurred())
|
|
PyErr_SetString(PyExc_TypeError, "object does not provide __dir__");
|
|
return NULL;
|
|
}
|
|
/* use __dir__ */
|
|
result = _PyObject_CallNoArg(dirfunc);
|
|
Py_DECREF(dirfunc);
|
|
if (result == NULL)
|
|
return NULL;
|
|
/* return sorted(result) */
|
|
sorted = PySequence_List(result);
|
|
Py_DECREF(result);
|
|
if (sorted == NULL)
|
|
return NULL;
|
|
if (PyList_Sort(sorted)) {
|
|
Py_DECREF(sorted);
|
|
return NULL;
|
|
}
|
|
return sorted;
|
|
}
|
|
|
|
/* Implementation of dir() -- if obj is NULL, returns the names in the current
|
|
(local) scope. Otherwise, performs introspection of the object: returns a
|
|
sorted list of attribute names (supposedly) accessible from the object
|
|
*/
|
|
PyObject *
|
|
PyObject_Dir(PyObject *obj)
|
|
{
|
|
return (obj == NULL) ? _dir_locals() : _dir_object(obj);
|
|
}
|
|
|
|
/*
|
|
None is a non-NULL undefined value.
|
|
There is (and should be!) no way to create other objects of this type,
|
|
so there is exactly one (which is indestructible, by the way).
|
|
*/
|
|
|
|
/* ARGSUSED */
|
|
static PyObject *
|
|
none_repr(PyObject *op)
|
|
{
|
|
return PyUnicode_FromString("None");
|
|
}
|
|
|
|
/* ARGUSED */
|
|
static void _Py_NO_RETURN
|
|
none_dealloc(PyObject* ignore)
|
|
{
|
|
/* This should never get called, but we also don't want to SEGV if
|
|
* we accidentally decref None out of existence.
|
|
*/
|
|
Py_FatalError("deallocating None");
|
|
}
|
|
|
|
static PyObject *
|
|
none_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
|
|
{
|
|
if (PyTuple_GET_SIZE(args) || (kwargs && PyDict_GET_SIZE(kwargs))) {
|
|
PyErr_SetString(PyExc_TypeError, "NoneType takes no arguments");
|
|
return NULL;
|
|
}
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
static int
|
|
none_bool(PyObject *v)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static PyNumberMethods none_as_number = {
|
|
0, /* nb_add */
|
|
0, /* nb_subtract */
|
|
0, /* nb_multiply */
|
|
0, /* nb_remainder */
|
|
0, /* nb_divmod */
|
|
0, /* nb_power */
|
|
0, /* nb_negative */
|
|
0, /* nb_positive */
|
|
0, /* nb_absolute */
|
|
(inquiry)none_bool, /* nb_bool */
|
|
0, /* nb_invert */
|
|
0, /* nb_lshift */
|
|
0, /* nb_rshift */
|
|
0, /* nb_and */
|
|
0, /* nb_xor */
|
|
0, /* nb_or */
|
|
0, /* nb_int */
|
|
0, /* nb_reserved */
|
|
0, /* nb_float */
|
|
0, /* nb_inplace_add */
|
|
0, /* nb_inplace_subtract */
|
|
0, /* nb_inplace_multiply */
|
|
0, /* nb_inplace_remainder */
|
|
0, /* nb_inplace_power */
|
|
0, /* nb_inplace_lshift */
|
|
0, /* nb_inplace_rshift */
|
|
0, /* nb_inplace_and */
|
|
0, /* nb_inplace_xor */
|
|
0, /* nb_inplace_or */
|
|
0, /* nb_floor_divide */
|
|
0, /* nb_true_divide */
|
|
0, /* nb_inplace_floor_divide */
|
|
0, /* nb_inplace_true_divide */
|
|
0, /* nb_index */
|
|
};
|
|
|
|
PyTypeObject _PyNone_Type = {
|
|
PyVarObject_HEAD_INIT(&PyType_Type, 0)
|
|
"NoneType",
|
|
0,
|
|
0,
|
|
none_dealloc, /*tp_dealloc*/ /*never called*/
|
|
0, /*tp_vectorcall_offset*/
|
|
0, /*tp_getattr*/
|
|
0, /*tp_setattr*/
|
|
0, /*tp_as_async*/
|
|
none_repr, /*tp_repr*/
|
|
&none_as_number, /*tp_as_number*/
|
|
0, /*tp_as_sequence*/
|
|
0, /*tp_as_mapping*/
|
|
0, /*tp_hash */
|
|
0, /*tp_call */
|
|
0, /*tp_str */
|
|
0, /*tp_getattro */
|
|
0, /*tp_setattro */
|
|
0, /*tp_as_buffer */
|
|
Py_TPFLAGS_DEFAULT, /*tp_flags */
|
|
0, /*tp_doc */
|
|
0, /*tp_traverse */
|
|
0, /*tp_clear */
|
|
0, /*tp_richcompare */
|
|
0, /*tp_weaklistoffset */
|
|
0, /*tp_iter */
|
|
0, /*tp_iternext */
|
|
0, /*tp_methods */
|
|
0, /*tp_members */
|
|
0, /*tp_getset */
|
|
0, /*tp_base */
|
|
0, /*tp_dict */
|
|
0, /*tp_descr_get */
|
|
0, /*tp_descr_set */
|
|
0, /*tp_dictoffset */
|
|
0, /*tp_init */
|
|
0, /*tp_alloc */
|
|
none_new, /*tp_new */
|
|
};
|
|
|
|
PyObject _Py_NoneStruct = {
|
|
_PyObject_EXTRA_INIT
|
|
1, &_PyNone_Type
|
|
};
|
|
|
|
/* NotImplemented is an object that can be used to signal that an
|
|
operation is not implemented for the given type combination. */
|
|
|
|
static PyObject *
|
|
NotImplemented_repr(PyObject *op)
|
|
{
|
|
return PyUnicode_FromString("NotImplemented");
|
|
}
|
|
|
|
static PyObject *
|
|
NotImplemented_reduce(PyObject *op, PyObject *Py_UNUSED(ignored))
|
|
{
|
|
return PyUnicode_FromString("NotImplemented");
|
|
}
|
|
|
|
static PyMethodDef notimplemented_methods[] = {
|
|
{"__reduce__", NotImplemented_reduce, METH_NOARGS, NULL},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
static PyObject *
|
|
notimplemented_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
|
|
{
|
|
if (PyTuple_GET_SIZE(args) || (kwargs && PyDict_GET_SIZE(kwargs))) {
|
|
PyErr_SetString(PyExc_TypeError, "NotImplementedType takes no arguments");
|
|
return NULL;
|
|
}
|
|
Py_RETURN_NOTIMPLEMENTED;
|
|
}
|
|
|
|
static void _Py_NO_RETURN
|
|
notimplemented_dealloc(PyObject* ignore)
|
|
{
|
|
/* This should never get called, but we also don't want to SEGV if
|
|
* we accidentally decref NotImplemented out of existence.
|
|
*/
|
|
Py_FatalError("deallocating NotImplemented");
|
|
}
|
|
|
|
static int
|
|
notimplemented_bool(PyObject *v)
|
|
{
|
|
if (PyErr_WarnEx(PyExc_DeprecationWarning,
|
|
"NotImplemented should not be used in a boolean context",
|
|
1) < 0)
|
|
{
|
|
return -1;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static PyNumberMethods notimplemented_as_number = {
|
|
.nb_bool = notimplemented_bool,
|
|
};
|
|
|
|
PyTypeObject _PyNotImplemented_Type = {
|
|
PyVarObject_HEAD_INIT(&PyType_Type, 0)
|
|
"NotImplementedType",
|
|
0,
|
|
0,
|
|
notimplemented_dealloc, /*tp_dealloc*/ /*never called*/
|
|
0, /*tp_vectorcall_offset*/
|
|
0, /*tp_getattr*/
|
|
0, /*tp_setattr*/
|
|
0, /*tp_as_async*/
|
|
NotImplemented_repr, /*tp_repr*/
|
|
¬implemented_as_number, /*tp_as_number*/
|
|
0, /*tp_as_sequence*/
|
|
0, /*tp_as_mapping*/
|
|
0, /*tp_hash */
|
|
0, /*tp_call */
|
|
0, /*tp_str */
|
|
0, /*tp_getattro */
|
|
0, /*tp_setattro */
|
|
0, /*tp_as_buffer */
|
|
Py_TPFLAGS_DEFAULT, /*tp_flags */
|
|
0, /*tp_doc */
|
|
0, /*tp_traverse */
|
|
0, /*tp_clear */
|
|
0, /*tp_richcompare */
|
|
0, /*tp_weaklistoffset */
|
|
0, /*tp_iter */
|
|
0, /*tp_iternext */
|
|
notimplemented_methods, /*tp_methods */
|
|
0, /*tp_members */
|
|
0, /*tp_getset */
|
|
0, /*tp_base */
|
|
0, /*tp_dict */
|
|
0, /*tp_descr_get */
|
|
0, /*tp_descr_set */
|
|
0, /*tp_dictoffset */
|
|
0, /*tp_init */
|
|
0, /*tp_alloc */
|
|
notimplemented_new, /*tp_new */
|
|
};
|
|
|
|
PyObject _Py_NotImplementedStruct = {
|
|
_PyObject_EXTRA_INIT
|
|
1, &_PyNotImplemented_Type
|
|
};
|
|
|
|
PyStatus
|
|
_PyTypes_Init(void)
|
|
{
|
|
PyStatus status = _PyTypes_InitSlotDefs();
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
|
|
#define INIT_TYPE(TYPE) \
|
|
do { \
|
|
if (PyType_Ready(&(TYPE)) < 0) { \
|
|
return _PyStatus_ERR("Can't initialize " #TYPE " type"); \
|
|
} \
|
|
} while (0)
|
|
|
|
// Base types
|
|
INIT_TYPE(PyBaseObject_Type);
|
|
INIT_TYPE(PyType_Type);
|
|
assert(PyBaseObject_Type.tp_base == NULL);
|
|
assert(PyType_Type.tp_base == &PyBaseObject_Type);
|
|
|
|
// All other static types
|
|
INIT_TYPE(PyAsyncGen_Type);
|
|
INIT_TYPE(PyBool_Type);
|
|
INIT_TYPE(PyByteArrayIter_Type);
|
|
INIT_TYPE(PyByteArray_Type);
|
|
INIT_TYPE(PyBytesIter_Type);
|
|
INIT_TYPE(PyBytes_Type);
|
|
INIT_TYPE(PyCFunction_Type);
|
|
INIT_TYPE(PyCMethod_Type);
|
|
INIT_TYPE(PyCallIter_Type);
|
|
INIT_TYPE(PyCapsule_Type);
|
|
INIT_TYPE(PyCell_Type);
|
|
INIT_TYPE(PyClassMethodDescr_Type);
|
|
INIT_TYPE(PyClassMethod_Type);
|
|
INIT_TYPE(PyCode_Type);
|
|
INIT_TYPE(PyComplex_Type);
|
|
INIT_TYPE(PyCoro_Type);
|
|
INIT_TYPE(PyDictItems_Type);
|
|
INIT_TYPE(PyDictIterItem_Type);
|
|
INIT_TYPE(PyDictIterKey_Type);
|
|
INIT_TYPE(PyDictIterValue_Type);
|
|
INIT_TYPE(PyDictKeys_Type);
|
|
INIT_TYPE(PyDictProxy_Type);
|
|
INIT_TYPE(PyDictRevIterItem_Type);
|
|
INIT_TYPE(PyDictRevIterKey_Type);
|
|
INIT_TYPE(PyDictRevIterValue_Type);
|
|
INIT_TYPE(PyDictValues_Type);
|
|
INIT_TYPE(PyDict_Type);
|
|
INIT_TYPE(PyEllipsis_Type);
|
|
INIT_TYPE(PyEnum_Type);
|
|
INIT_TYPE(PyFloat_Type);
|
|
INIT_TYPE(PyFrame_Type);
|
|
INIT_TYPE(PyFrozenSet_Type);
|
|
INIT_TYPE(PyFunction_Type);
|
|
INIT_TYPE(PyGen_Type);
|
|
INIT_TYPE(PyGetSetDescr_Type);
|
|
INIT_TYPE(PyInstanceMethod_Type);
|
|
INIT_TYPE(PyListIter_Type);
|
|
INIT_TYPE(PyListRevIter_Type);
|
|
INIT_TYPE(PyList_Type);
|
|
INIT_TYPE(PyLongRangeIter_Type);
|
|
INIT_TYPE(PyLong_Type);
|
|
INIT_TYPE(PyMemberDescr_Type);
|
|
INIT_TYPE(PyMemoryView_Type);
|
|
INIT_TYPE(PyMethodDescr_Type);
|
|
INIT_TYPE(PyMethod_Type);
|
|
INIT_TYPE(PyModuleDef_Type);
|
|
INIT_TYPE(PyModule_Type);
|
|
INIT_TYPE(PyODictItems_Type);
|
|
INIT_TYPE(PyODictIter_Type);
|
|
INIT_TYPE(PyODictKeys_Type);
|
|
INIT_TYPE(PyODictValues_Type);
|
|
INIT_TYPE(PyODict_Type);
|
|
INIT_TYPE(PyPickleBuffer_Type);
|
|
INIT_TYPE(PyProperty_Type);
|
|
INIT_TYPE(PyRangeIter_Type);
|
|
INIT_TYPE(PyRange_Type);
|
|
INIT_TYPE(PyReversed_Type);
|
|
INIT_TYPE(PySTEntry_Type);
|
|
INIT_TYPE(PySeqIter_Type);
|
|
INIT_TYPE(PySetIter_Type);
|
|
INIT_TYPE(PySet_Type);
|
|
INIT_TYPE(PySlice_Type);
|
|
INIT_TYPE(PyStaticMethod_Type);
|
|
INIT_TYPE(PyStdPrinter_Type);
|
|
INIT_TYPE(PySuper_Type);
|
|
INIT_TYPE(PyTraceBack_Type);
|
|
INIT_TYPE(PyTupleIter_Type);
|
|
INIT_TYPE(PyTuple_Type);
|
|
INIT_TYPE(PyUnicodeIter_Type);
|
|
INIT_TYPE(PyUnicode_Type);
|
|
INIT_TYPE(PyWrapperDescr_Type);
|
|
INIT_TYPE(Py_GenericAliasType);
|
|
INIT_TYPE(_PyAnextAwaitable_Type);
|
|
INIT_TYPE(_PyAsyncGenASend_Type);
|
|
INIT_TYPE(_PyAsyncGenAThrow_Type);
|
|
INIT_TYPE(_PyAsyncGenWrappedValue_Type);
|
|
INIT_TYPE(_PyCoroWrapper_Type);
|
|
INIT_TYPE(_PyInterpreterID_Type);
|
|
INIT_TYPE(_PyManagedBuffer_Type);
|
|
INIT_TYPE(_PyMethodWrapper_Type);
|
|
INIT_TYPE(_PyNamespace_Type);
|
|
INIT_TYPE(_PyNone_Type);
|
|
INIT_TYPE(_PyNotImplemented_Type);
|
|
INIT_TYPE(_PyWeakref_CallableProxyType);
|
|
INIT_TYPE(_PyWeakref_ProxyType);
|
|
INIT_TYPE(_PyWeakref_RefType);
|
|
INIT_TYPE(_PyUnion_Type);
|
|
|
|
return _PyStatus_OK();
|
|
#undef INIT_TYPE
|
|
}
|
|
|
|
|
|
void
|
|
_Py_NewReference(PyObject *op)
|
|
{
|
|
if (_Py_tracemalloc_config.tracing) {
|
|
_PyTraceMalloc_NewReference(op);
|
|
}
|
|
#ifdef Py_REF_DEBUG
|
|
_Py_RefTotal++;
|
|
#endif
|
|
Py_SET_REFCNT(op, 1);
|
|
#ifdef Py_TRACE_REFS
|
|
_Py_AddToAllObjects(op, 1);
|
|
#endif
|
|
}
|
|
|
|
|
|
#ifdef Py_TRACE_REFS
|
|
void
|
|
_Py_ForgetReference(PyObject *op)
|
|
{
|
|
if (Py_REFCNT(op) < 0) {
|
|
_PyObject_ASSERT_FAILED_MSG(op, "negative refcnt");
|
|
}
|
|
|
|
if (op == &refchain ||
|
|
op->_ob_prev->_ob_next != op || op->_ob_next->_ob_prev != op)
|
|
{
|
|
_PyObject_ASSERT_FAILED_MSG(op, "invalid object chain");
|
|
}
|
|
|
|
#ifdef SLOW_UNREF_CHECK
|
|
PyObject *p;
|
|
for (p = refchain._ob_next; p != &refchain; p = p->_ob_next) {
|
|
if (p == op) {
|
|
break;
|
|
}
|
|
}
|
|
if (p == &refchain) {
|
|
/* Not found */
|
|
_PyObject_ASSERT_FAILED_MSG(op,
|
|
"object not found in the objects list");
|
|
}
|
|
#endif
|
|
|
|
op->_ob_next->_ob_prev = op->_ob_prev;
|
|
op->_ob_prev->_ob_next = op->_ob_next;
|
|
op->_ob_next = op->_ob_prev = NULL;
|
|
}
|
|
|
|
/* Print all live objects. Because PyObject_Print is called, the
|
|
* interpreter must be in a healthy state.
|
|
*/
|
|
void
|
|
_Py_PrintReferences(FILE *fp)
|
|
{
|
|
PyObject *op;
|
|
fprintf(fp, "Remaining objects:\n");
|
|
for (op = refchain._ob_next; op != &refchain; op = op->_ob_next) {
|
|
fprintf(fp, "%p [%zd] ", (void *)op, Py_REFCNT(op));
|
|
if (PyObject_Print(op, fp, 0) != 0) {
|
|
PyErr_Clear();
|
|
}
|
|
putc('\n', fp);
|
|
}
|
|
}
|
|
|
|
/* Print the addresses of all live objects. Unlike _Py_PrintReferences, this
|
|
* doesn't make any calls to the Python C API, so is always safe to call.
|
|
*/
|
|
void
|
|
_Py_PrintReferenceAddresses(FILE *fp)
|
|
{
|
|
PyObject *op;
|
|
fprintf(fp, "Remaining object addresses:\n");
|
|
for (op = refchain._ob_next; op != &refchain; op = op->_ob_next)
|
|
fprintf(fp, "%p [%zd] %s\n", (void *)op,
|
|
Py_REFCNT(op), Py_TYPE(op)->tp_name);
|
|
}
|
|
|
|
PyObject *
|
|
_Py_GetObjects(PyObject *self, PyObject *args)
|
|
{
|
|
int i, n;
|
|
PyObject *t = NULL;
|
|
PyObject *res, *op;
|
|
|
|
if (!PyArg_ParseTuple(args, "i|O", &n, &t))
|
|
return NULL;
|
|
op = refchain._ob_next;
|
|
res = PyList_New(0);
|
|
if (res == NULL)
|
|
return NULL;
|
|
for (i = 0; (n == 0 || i < n) && op != &refchain; i++) {
|
|
while (op == self || op == args || op == res || op == t ||
|
|
(t != NULL && !Py_IS_TYPE(op, (PyTypeObject *) t))) {
|
|
op = op->_ob_next;
|
|
if (op == &refchain)
|
|
return res;
|
|
}
|
|
if (PyList_Append(res, op) < 0) {
|
|
Py_DECREF(res);
|
|
return NULL;
|
|
}
|
|
op = op->_ob_next;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
/* Hack to force loading of abstract.o */
|
|
Py_ssize_t (*_Py_abstract_hack)(PyObject *) = PyObject_Size;
|
|
|
|
|
|
void
|
|
_PyObject_DebugTypeStats(FILE *out)
|
|
{
|
|
_PyDict_DebugMallocStats(out);
|
|
_PyFloat_DebugMallocStats(out);
|
|
_PyFrame_DebugMallocStats(out);
|
|
_PyList_DebugMallocStats(out);
|
|
_PyTuple_DebugMallocStats(out);
|
|
}
|
|
|
|
/* These methods are used to control infinite recursion in repr, str, print,
|
|
etc. Container objects that may recursively contain themselves,
|
|
e.g. builtin dictionaries and lists, should use Py_ReprEnter() and
|
|
Py_ReprLeave() to avoid infinite recursion.
|
|
|
|
Py_ReprEnter() returns 0 the first time it is called for a particular
|
|
object and 1 every time thereafter. It returns -1 if an exception
|
|
occurred. Py_ReprLeave() has no return value.
|
|
|
|
See dictobject.c and listobject.c for examples of use.
|
|
*/
|
|
|
|
int
|
|
Py_ReprEnter(PyObject *obj)
|
|
{
|
|
PyObject *dict;
|
|
PyObject *list;
|
|
Py_ssize_t i;
|
|
|
|
dict = PyThreadState_GetDict();
|
|
/* Ignore a missing thread-state, so that this function can be called
|
|
early on startup. */
|
|
if (dict == NULL)
|
|
return 0;
|
|
list = _PyDict_GetItemIdWithError(dict, &PyId_Py_Repr);
|
|
if (list == NULL) {
|
|
if (PyErr_Occurred()) {
|
|
return -1;
|
|
}
|
|
list = PyList_New(0);
|
|
if (list == NULL)
|
|
return -1;
|
|
if (_PyDict_SetItemId(dict, &PyId_Py_Repr, list) < 0)
|
|
return -1;
|
|
Py_DECREF(list);
|
|
}
|
|
i = PyList_GET_SIZE(list);
|
|
while (--i >= 0) {
|
|
if (PyList_GET_ITEM(list, i) == obj)
|
|
return 1;
|
|
}
|
|
if (PyList_Append(list, obj) < 0)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
Py_ReprLeave(PyObject *obj)
|
|
{
|
|
PyObject *dict;
|
|
PyObject *list;
|
|
Py_ssize_t i;
|
|
PyObject *error_type, *error_value, *error_traceback;
|
|
|
|
PyErr_Fetch(&error_type, &error_value, &error_traceback);
|
|
|
|
dict = PyThreadState_GetDict();
|
|
if (dict == NULL)
|
|
goto finally;
|
|
|
|
list = _PyDict_GetItemIdWithError(dict, &PyId_Py_Repr);
|
|
if (list == NULL || !PyList_Check(list))
|
|
goto finally;
|
|
|
|
i = PyList_GET_SIZE(list);
|
|
/* Count backwards because we always expect obj to be list[-1] */
|
|
while (--i >= 0) {
|
|
if (PyList_GET_ITEM(list, i) == obj) {
|
|
PyList_SetSlice(list, i, i + 1, NULL);
|
|
break;
|
|
}
|
|
}
|
|
|
|
finally:
|
|
/* ignore exceptions because there is no way to report them. */
|
|
PyErr_Restore(error_type, error_value, error_traceback);
|
|
}
|
|
|
|
/* Trashcan support. */
|
|
|
|
#define _PyTrash_UNWIND_LEVEL 50
|
|
|
|
/* Add op to the gcstate->trash_delete_later list. Called when the current
|
|
* call-stack depth gets large. op must be a currently untracked gc'ed
|
|
* object, with refcount 0. Py_DECREF must already have been called on it.
|
|
*/
|
|
static void
|
|
_PyTrash_thread_deposit_object(PyObject *op)
|
|
{
|
|
PyThreadState *tstate = _PyThreadState_GET();
|
|
_PyObject_ASSERT(op, _PyObject_IS_GC(op));
|
|
_PyObject_ASSERT(op, !_PyObject_GC_IS_TRACKED(op));
|
|
_PyObject_ASSERT(op, Py_REFCNT(op) == 0);
|
|
_PyGCHead_SET_PREV(_Py_AS_GC(op), tstate->trash_delete_later);
|
|
tstate->trash_delete_later = op;
|
|
}
|
|
|
|
/* Deallocate all the objects in the gcstate->trash_delete_later list.
|
|
* Called when the call-stack unwinds again. */
|
|
static void
|
|
_PyTrash_thread_destroy_chain(void)
|
|
{
|
|
PyThreadState *tstate = _PyThreadState_GET();
|
|
/* We need to increase trash_delete_nesting here, otherwise,
|
|
_PyTrash_thread_destroy_chain will be called recursively
|
|
and then possibly crash. An example that may crash without
|
|
increase:
|
|
N = 500000 # need to be large enough
|
|
ob = object()
|
|
tups = [(ob,) for i in range(N)]
|
|
for i in range(49):
|
|
tups = [(tup,) for tup in tups]
|
|
del tups
|
|
*/
|
|
assert(tstate->trash_delete_nesting == 0);
|
|
++tstate->trash_delete_nesting;
|
|
while (tstate->trash_delete_later) {
|
|
PyObject *op = tstate->trash_delete_later;
|
|
destructor dealloc = Py_TYPE(op)->tp_dealloc;
|
|
|
|
tstate->trash_delete_later =
|
|
(PyObject*) _PyGCHead_PREV(_Py_AS_GC(op));
|
|
|
|
/* Call the deallocator directly. This used to try to
|
|
* fool Py_DECREF into calling it indirectly, but
|
|
* Py_DECREF was already called on this object, and in
|
|
* assorted non-release builds calling Py_DECREF again ends
|
|
* up distorting allocation statistics.
|
|
*/
|
|
_PyObject_ASSERT(op, Py_REFCNT(op) == 0);
|
|
(*dealloc)(op);
|
|
assert(tstate->trash_delete_nesting == 1);
|
|
}
|
|
--tstate->trash_delete_nesting;
|
|
}
|
|
|
|
|
|
int
|
|
_PyTrash_begin(PyThreadState *tstate, PyObject *op)
|
|
{
|
|
if (tstate->trash_delete_nesting >= _PyTrash_UNWIND_LEVEL) {
|
|
/* Store the object (to be deallocated later) and jump past
|
|
* Py_TRASHCAN_END, skipping the body of the deallocator */
|
|
_PyTrash_thread_deposit_object(op);
|
|
return 1;
|
|
}
|
|
++tstate->trash_delete_nesting;
|
|
return 0;
|
|
}
|
|
|
|
|
|
void
|
|
_PyTrash_end(PyThreadState *tstate)
|
|
{
|
|
--tstate->trash_delete_nesting;
|
|
if (tstate->trash_delete_later && tstate->trash_delete_nesting <= 0) {
|
|
_PyTrash_thread_destroy_chain();
|
|
}
|
|
}
|
|
|
|
|
|
/* bpo-40170: It's only be used in Py_TRASHCAN_BEGIN macro to hide
|
|
implementation details. */
|
|
int
|
|
_PyTrash_cond(PyObject *op, destructor dealloc)
|
|
{
|
|
return Py_TYPE(op)->tp_dealloc == dealloc;
|
|
}
|
|
|
|
|
|
void _Py_NO_RETURN
|
|
_PyObject_AssertFailed(PyObject *obj, const char *expr, const char *msg,
|
|
const char *file, int line, const char *function)
|
|
{
|
|
fprintf(stderr, "%s:%d: ", file, line);
|
|
if (function) {
|
|
fprintf(stderr, "%s: ", function);
|
|
}
|
|
fflush(stderr);
|
|
|
|
if (expr) {
|
|
fprintf(stderr, "Assertion \"%s\" failed", expr);
|
|
}
|
|
else {
|
|
fprintf(stderr, "Assertion failed");
|
|
}
|
|
fflush(stderr);
|
|
|
|
if (msg) {
|
|
fprintf(stderr, ": %s", msg);
|
|
}
|
|
fprintf(stderr, "\n");
|
|
fflush(stderr);
|
|
|
|
if (_PyObject_IsFreed(obj)) {
|
|
/* It seems like the object memory has been freed:
|
|
don't access it to prevent a segmentation fault. */
|
|
fprintf(stderr, "<object at %p is freed>\n", obj);
|
|
fflush(stderr);
|
|
}
|
|
else {
|
|
/* Display the traceback where the object has been allocated.
|
|
Do it before dumping repr(obj), since repr() is more likely
|
|
to crash than dumping the traceback. */
|
|
void *ptr;
|
|
PyTypeObject *type = Py_TYPE(obj);
|
|
if (_PyType_IS_GC(type)) {
|
|
ptr = (void *)((char *)obj - sizeof(PyGC_Head));
|
|
}
|
|
else {
|
|
ptr = (void *)obj;
|
|
}
|
|
_PyMem_DumpTraceback(fileno(stderr), ptr);
|
|
|
|
/* This might succeed or fail, but we're about to abort, so at least
|
|
try to provide any extra info we can: */
|
|
_PyObject_Dump(obj);
|
|
|
|
fprintf(stderr, "\n");
|
|
fflush(stderr);
|
|
}
|
|
|
|
Py_FatalError("_PyObject_AssertFailed");
|
|
}
|
|
|
|
|
|
void
|
|
_Py_Dealloc(PyObject *op)
|
|
{
|
|
destructor dealloc = Py_TYPE(op)->tp_dealloc;
|
|
#ifdef Py_TRACE_REFS
|
|
_Py_ForgetReference(op);
|
|
#endif
|
|
(*dealloc)(op);
|
|
}
|
|
|
|
|
|
PyObject **
|
|
PyObject_GET_WEAKREFS_LISTPTR(PyObject *op)
|
|
{
|
|
return _PyObject_GET_WEAKREFS_LISTPTR(op);
|
|
}
|
|
|
|
|
|
#undef Py_NewRef
|
|
#undef Py_XNewRef
|
|
|
|
// Export Py_NewRef() and Py_XNewRef() as regular functions for the stable ABI.
|
|
PyObject*
|
|
Py_NewRef(PyObject *obj)
|
|
{
|
|
return _Py_NewRef(obj);
|
|
}
|
|
|
|
PyObject*
|
|
Py_XNewRef(PyObject *obj)
|
|
{
|
|
return _Py_XNewRef(obj);
|
|
}
|
|
|
|
#undef Py_Is
|
|
#undef Py_IsNone
|
|
#undef Py_IsTrue
|
|
#undef Py_IsFalse
|
|
|
|
// Export Py_Is(), Py_IsNone(), Py_IsTrue(), Py_IsFalse() as regular functions
|
|
// for the stable ABI.
|
|
int Py_Is(PyObject *x, PyObject *y)
|
|
{
|
|
return (x == y);
|
|
}
|
|
|
|
int Py_IsNone(PyObject *x)
|
|
{
|
|
return Py_Is(x, Py_None);
|
|
}
|
|
|
|
int Py_IsTrue(PyObject *x)
|
|
{
|
|
return Py_Is(x, Py_True);
|
|
}
|
|
|
|
int Py_IsFalse(PyObject *x)
|
|
{
|
|
return Py_Is(x, Py_False);
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|