| |
| /* Generic object operations; and implementation of None */ |
| |
| #include "Python.h" |
| #include "pycore_ceval.h" // _Py_EnterRecursiveCall() |
| #include "pycore_context.h" |
| #include "pycore_initconfig.h" |
| #include "pycore_object.h" |
| #include "pycore_pyerrors.h" |
| #include "pycore_pylifecycle.h" |
| #include "pycore_pymem.h" // _PyMem_IsPtrFreed() |
| #include "pycore_pystate.h" // _PyThreadState_GET() |
| #include "frameobject.h" |
| #include "interpreteridobject.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /* Defined in tracemalloc.c */ |
| extern void _PyMem_DumpTraceback(int fd, const void *ptr); |
| |
| _Py_IDENTIFIER(Py_Repr); |
| _Py_IDENTIFIER(__bytes__); |
| _Py_IDENTIFIER(__dir__); |
| _Py_IDENTIFIER(__isabstractmethod__); |
| |
| |
| int |
| _PyObject_CheckConsistency(PyObject *op, int check_content) |
| { |
| #define CHECK(expr) \ |
| do { if (!(expr)) { _PyObject_ASSERT_FAILED_MSG(op, Py_STRINGIFY(expr)); } } while (0) |
| |
| CHECK(!_PyObject_IsFreed(op)); |
| CHECK(Py_REFCNT(op) >= 1); |
| |
| _PyType_CheckConsistency(Py_TYPE(op)); |
| |
| if (PyUnicode_Check(op)) { |
| _PyUnicode_CheckConsistency(op, check_content); |
| } |
| else if (PyDict_Check(op)) { |
| _PyDict_CheckConsistency(op, check_content); |
| } |
| return 1; |
| |
| #undef CHECK |
| } |
| |
| |
| #ifdef Py_REF_DEBUG |
| Py_ssize_t _Py_RefTotal; |
| |
| Py_ssize_t |
| _Py_GetRefTotal(void) |
| { |
| PyObject *o; |
| Py_ssize_t total = _Py_RefTotal; |
| o = _PySet_Dummy; |
| if (o != NULL) |
| total -= Py_REFCNT(o); |
| return total; |
| } |
| |
| void |
| _PyDebug_PrintTotalRefs(void) { |
| fprintf(stderr, |
| "[%zd refs, %zd blocks]\n", |
| _Py_GetRefTotal(), _Py_GetAllocatedBlocks()); |
| } |
| #endif /* Py_REF_DEBUG */ |
| |
| /* Object allocation routines used by NEWOBJ and NEWVAROBJ macros. |
| These are used by the individual routines for object creation. |
| Do not call them otherwise, they do not initialize the object! */ |
| |
| #ifdef Py_TRACE_REFS |
| /* Head of circular doubly-linked list of all objects. These are linked |
| * together via the _ob_prev and _ob_next members of a PyObject, which |
| * exist only in a Py_TRACE_REFS build. |
| */ |
| static PyObject refchain = {&refchain, &refchain}; |
| |
| /* Insert op at the front of the list of all objects. If force is true, |
| * op is added even if _ob_prev and _ob_next are non-NULL already. If |
| * force is false amd _ob_prev or _ob_next are non-NULL, do nothing. |
| * force should be true if and only if op points to freshly allocated, |
| * uninitialized memory, or you've unlinked op from the list and are |
| * relinking it into the front. |
| * Note that objects are normally added to the list via _Py_NewReference, |
| * which is called by PyObject_Init. Not all objects are initialized that |
| * way, though; exceptions include statically allocated type objects, and |
| * statically allocated singletons (like Py_True and Py_None). |
| */ |
| void |
| _Py_AddToAllObjects(PyObject *op, int force) |
| { |
| #ifdef Py_DEBUG |
| if (!force) { |
| /* If it's initialized memory, op must be in or out of |
| * the list unambiguously. |
| */ |
| _PyObject_ASSERT(op, (op->_ob_prev == NULL) == (op->_ob_next == NULL)); |
| } |
| #endif |
| if (force || op->_ob_prev == NULL) { |
| op->_ob_next = refchain._ob_next; |
| op->_ob_prev = &refchain; |
| refchain._ob_next->_ob_prev = op; |
| refchain._ob_next = op; |
| } |
| } |
| #endif /* Py_TRACE_REFS */ |
| |
| #ifdef Py_REF_DEBUG |
| /* Log a fatal error; doesn't return. */ |
| void |
| _Py_NegativeRefcount(const char *filename, int lineno, PyObject *op) |
| { |
| _PyObject_AssertFailed(op, NULL, "object has negative ref count", |
| filename, lineno, __func__); |
| } |
| |
| #endif /* Py_REF_DEBUG */ |
| |
| void |
| Py_IncRef(PyObject *o) |
| { |
| Py_XINCREF(o); |
| } |
| |
| void |
| Py_DecRef(PyObject *o) |
| { |
| Py_XDECREF(o); |
| } |
| |
| PyObject * |
| PyObject_Init(PyObject *op, PyTypeObject *tp) |
| { |
| if (op == NULL) { |
| return PyErr_NoMemory(); |
| } |
| |
| _PyObject_Init(op, tp); |
| return op; |
| } |
| |
| PyVarObject * |
| PyObject_InitVar(PyVarObject *op, PyTypeObject *tp, Py_ssize_t size) |
| { |
| if (op == NULL) { |
| return (PyVarObject *) PyErr_NoMemory(); |
| } |
| |
| _PyObject_InitVar(op, tp, size); |
| return op; |
| } |
| |
| PyObject * |
| _PyObject_New(PyTypeObject *tp) |
| { |
| PyObject *op = (PyObject *) PyObject_MALLOC(_PyObject_SIZE(tp)); |
| if (op == NULL) { |
| return PyErr_NoMemory(); |
| } |
| _PyObject_Init(op, tp); |
| return op; |
| } |
| |
| PyVarObject * |
| _PyObject_NewVar(PyTypeObject *tp, Py_ssize_t nitems) |
| { |
| PyVarObject *op; |
| const size_t size = _PyObject_VAR_SIZE(tp, nitems); |
| op = (PyVarObject *) PyObject_MALLOC(size); |
| if (op == NULL) { |
| return (PyVarObject *)PyErr_NoMemory(); |
| } |
| _PyObject_InitVar(op, tp, nitems); |
| return op; |
| } |
| |
| void |
| PyObject_CallFinalizer(PyObject *self) |
| { |
| PyTypeObject *tp = Py_TYPE(self); |
| |
| if (tp->tp_finalize == NULL) |
| return; |
| /* tp_finalize should only be called once. */ |
| if (_PyType_IS_GC(tp) && _PyGC_FINALIZED(self)) |
| return; |
| |
| tp->tp_finalize(self); |
| if (_PyType_IS_GC(tp)) { |
| _PyGC_SET_FINALIZED(self); |
| } |
| } |
| |
| int |
| PyObject_CallFinalizerFromDealloc(PyObject *self) |
| { |
| if (Py_REFCNT(self) != 0) { |
| _PyObject_ASSERT_FAILED_MSG(self, |
| "PyObject_CallFinalizerFromDealloc called " |
| "on object with a non-zero refcount"); |
| } |
| |
| /* Temporarily resurrect the object. */ |
| Py_SET_REFCNT(self, 1); |
| |
| PyObject_CallFinalizer(self); |
| |
| _PyObject_ASSERT_WITH_MSG(self, |
| Py_REFCNT(self) > 0, |
| "refcount is too small"); |
| |
| /* Undo the temporary resurrection; can't use DECREF here, it would |
| * cause a recursive call. */ |
| Py_SET_REFCNT(self, Py_REFCNT(self) - 1); |
| if (Py_REFCNT(self) == 0) { |
| return 0; /* this is the normal path out */ |
| } |
| |
| /* tp_finalize resurrected it! Make it look like the original Py_DECREF |
| * never happened. */ |
| Py_ssize_t refcnt = Py_REFCNT(self); |
| _Py_NewReference(self); |
| Py_SET_REFCNT(self, refcnt); |
| |
| _PyObject_ASSERT(self, |
| (!_PyType_IS_GC(Py_TYPE(self)) |
| || _PyObject_GC_IS_TRACKED(self))); |
| /* If Py_REF_DEBUG macro is defined, _Py_NewReference() increased |
| _Py_RefTotal, so we need to undo that. */ |
| #ifdef Py_REF_DEBUG |
| _Py_RefTotal--; |
| #endif |
| return -1; |
| } |
| |
| int |
| PyObject_Print(PyObject *op, FILE *fp, int flags) |
| { |
| int ret = 0; |
| if (PyErr_CheckSignals()) |
| return -1; |
| #ifdef USE_STACKCHECK |
| if (PyOS_CheckStack()) { |
| PyErr_SetString(PyExc_MemoryError, "stack overflow"); |
| return -1; |
| } |
| #endif |
| clearerr(fp); /* Clear any previous error condition */ |
| if (op == NULL) { |
| Py_BEGIN_ALLOW_THREADS |
| fprintf(fp, "<nil>"); |
| Py_END_ALLOW_THREADS |
| } |
| else { |
| if (Py_REFCNT(op) <= 0) { |
| /* XXX(twouters) cast refcount to long until %zd is |
| universally available */ |
| Py_BEGIN_ALLOW_THREADS |
| fprintf(fp, "<refcnt %ld at %p>", |
| (long)Py_REFCNT(op), (void *)op); |
| Py_END_ALLOW_THREADS |
| } |
| else { |
| PyObject *s; |
| if (flags & Py_PRINT_RAW) |
| s = PyObject_Str(op); |
| else |
| s = PyObject_Repr(op); |
| if (s == NULL) |
| ret = -1; |
| else if (PyBytes_Check(s)) { |
| fwrite(PyBytes_AS_STRING(s), 1, |
| PyBytes_GET_SIZE(s), fp); |
| } |
| else if (PyUnicode_Check(s)) { |
| PyObject *t; |
| t = PyUnicode_AsEncodedString(s, "utf-8", "backslashreplace"); |
| if (t == NULL) { |
| ret = -1; |
| } |
| else { |
| fwrite(PyBytes_AS_STRING(t), 1, |
| PyBytes_GET_SIZE(t), fp); |
| Py_DECREF(t); |
| } |
| } |
| else { |
| PyErr_Format(PyExc_TypeError, |
| "str() or repr() returned '%.100s'", |
| Py_TYPE(s)->tp_name); |
| ret = -1; |
| } |
| Py_XDECREF(s); |
| } |
| } |
| if (ret == 0) { |
| if (ferror(fp)) { |
| PyErr_SetFromErrno(PyExc_OSError); |
| clearerr(fp); |
| ret = -1; |
| } |
| } |
| return ret; |
| } |
| |
| /* For debugging convenience. Set a breakpoint here and call it from your DLL */ |
| void |
| _Py_BreakPoint(void) |
| { |
| } |
| |
| |
| /* Heuristic checking if the object memory is uninitialized or deallocated. |
| Rely on the debug hooks on Python memory allocators: |
| see _PyMem_IsPtrFreed(). |
| |
| The function can be used to prevent segmentation fault on dereferencing |
| pointers like 0xDDDDDDDDDDDDDDDD. */ |
| int |
| _PyObject_IsFreed(PyObject *op) |
| { |
| if (_PyMem_IsPtrFreed(op) || _PyMem_IsPtrFreed(Py_TYPE(op))) { |
| return 1; |
| } |
| /* ignore op->ob_ref: its value can have be modified |
| by Py_INCREF() and Py_DECREF(). */ |
| #ifdef Py_TRACE_REFS |
| if (op->_ob_next != NULL && _PyMem_IsPtrFreed(op->_ob_next)) { |
| return 1; |
| } |
| if (op->_ob_prev != NULL && _PyMem_IsPtrFreed(op->_ob_prev)) { |
| return 1; |
| } |
| #endif |
| return 0; |
| } |
| |
| |
| /* For debugging convenience. See Misc/gdbinit for some useful gdb hooks */ |
| void |
| _PyObject_Dump(PyObject* op) |
| { |
| if (_PyObject_IsFreed(op)) { |
| /* 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", op); |
| fflush(stderr); |
| return; |
| } |
| |
| /* first, write fields which are the least likely to crash */ |
| fprintf(stderr, "object address : %p\n", (void *)op); |
| /* XXX(twouters) cast refcount to long until %zd is |
| universally available */ |
| fprintf(stderr, "object refcount : %ld\n", (long)Py_REFCNT(op)); |
| fflush(stderr); |
| |
| PyTypeObject *type = Py_TYPE(op); |
| fprintf(stderr, "object type : %p\n", type); |
| fprintf(stderr, "object type name: %s\n", |
| type==NULL ? "NULL" : type->tp_name); |
| |
| /* the most dangerous part */ |
| fprintf(stderr, "object repr : "); |
| fflush(stderr); |
| |
| PyGILState_STATE gil = PyGILState_Ensure(); |
| PyObject *error_type, *error_value, *error_traceback; |
| PyErr_Fetch(&error_type, &error_value, &error_traceback); |
| |
| (void)PyObject_Print(op, stderr, 0); |
| fflush(stderr); |
| |
| PyErr_Restore(error_type, error_value, error_traceback); |
| PyGILState_Release(gil); |
| |
| fprintf(stderr, "\n"); |
| fflush(stderr); |
| } |
| |
| PyObject * |
| PyObject_Repr(PyObject *v) |
| { |
| PyObject *res; |
| if (PyErr_CheckSignals()) |
| return NULL; |
| #ifdef USE_STACKCHECK |
| if (PyOS_CheckStack()) { |
| PyErr_SetString(PyExc_MemoryError, "stack overflow"); |
| return NULL; |
| } |
| #endif |
| if (v == NULL) |
| return PyUnicode_FromString("<NULL>"); |
| if (Py_TYPE(v)->tp_repr == NULL) |
| return PyUnicode_FromFormat("<%s object at %p>", |
| Py_TYPE(v)->tp_name, v); |
| |
| PyThreadState *tstate = _PyThreadState_GET(); |
| #ifdef Py_DEBUG |
| /* PyObject_Repr() must not be called with an exception set, |
| because it can clear it (directly or indirectly) and so the |
| caller loses its exception */ |
| assert(!_PyErr_Occurred(tstate)); |
| #endif |
| |
| /* It is possible for a type to have a tp_repr representation that loops |
| infinitely. */ |
| if (_Py_EnterRecursiveCall(tstate, |
| " while getting the repr of an object")) { |
| return NULL; |
| } |
| res = (*Py_TYPE(v)->tp_repr)(v); |
| _Py_LeaveRecursiveCall(tstate); |
| |
| if (res == NULL) { |
| return NULL; |
| } |
| if (!PyUnicode_Check(res)) { |
| _PyErr_Format(tstate, PyExc_TypeError, |
| "__repr__ returned non-string (type %.200s)", |
| Py_TYPE(res)->tp_name); |
| Py_DECREF(res); |
| return NULL; |
| } |
| #ifndef Py_DEBUG |
| if (PyUnicode_READY(res) < 0) { |
| return NULL; |
| } |
| #endif |
| return res; |
| } |
| |
| PyObject * |
| PyObject_Str(PyObject *v) |
| { |
| PyObject *res; |
| if (PyErr_CheckSignals()) |
| return NULL; |
| #ifdef USE_STACKCHECK |
| if (PyOS_CheckStack()) { |
| PyErr_SetString(PyExc_MemoryError, "stack overflow"); |
| return NULL; |
| } |
| #endif |
| if (v == NULL) |
| return PyUnicode_FromString("<NULL>"); |
| if (PyUnicode_CheckExact(v)) { |
| #ifndef Py_DEBUG |
| if (PyUnicode_READY(v) < 0) |
| return NULL; |
| #endif |
| Py_INCREF(v); |
| return v; |
| } |
| if (Py_TYPE(v)->tp_str == NULL) |
| return PyObject_Repr(v); |
| |
| PyThreadState *tstate = _PyThreadState_GET(); |
| #ifdef Py_DEBUG |
| /* PyObject_Str() must not be called with an exception set, |
| because it can clear it (directly or indirectly) and so the |
| caller loses its exception */ |
| assert(!_PyErr_Occurred(tstate)); |
| #endif |
| |
| /* 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")) { |
| return NULL; |
| } |
| res = (*Py_TYPE(v)->tp_str)(v); |
| _Py_LeaveRecursiveCall(tstate); |
| |
| if (res == NULL) { |
| return NULL; |
| } |
| if (!PyUnicode_Check(res)) { |
| _PyErr_Format(tstate, PyExc_TypeError, |
| "__str__ returned non-string (type %.200s)", |
| Py_TYPE(res)->tp_name); |
| Py_DECREF(res); |
| return NULL; |
| } |
| #ifndef Py_DEBUG |
| if (PyUnicode_READY(res) < 0) { |
| return NULL; |
| } |
| #endif |
| assert(_PyUnicode_CheckConsistency(res, 1)); |
| return res; |
| } |
| |
| PyObject * |
| PyObject_ASCII(PyObject *v) |
| { |
| PyObject *repr, *ascii, *res; |
| |
| repr = PyObject_Repr(v); |
| if (repr == NULL) |
| return NULL; |
| |
| if (PyUnicode_IS_ASCII(repr)) |
| return repr; |
| |
| /* 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; |
| } |
| |
| 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; |
| } |
| if (tp->tp_getattro != NULL) |
| return (*tp->tp_getattro)(v, name); |
| if (tp->tp_getattr != NULL) { |
| const char *name_str = PyUnicode_AsUTF8(name); |
| if (name_str == NULL) |
| return NULL; |
| return (*tp->tp_getattr)(v, (char *)name_str); |
| } |
| PyErr_Format(PyExc_AttributeError, |
| "'%.50s' object has no attribute '%U'", |
| tp->tp_name, name); |
| return NULL; |
| } |
| |
| 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) |
| { |
| PyTypeObject *tp = Py_TYPE(obj); |
| PyObject *descr; |
| descrgetfunc f = NULL; |
| PyObject **dictptr, *dict; |
| PyObject *attr; |
| int meth_found = 0; |
| |
| assert(*method == NULL); |
| |
| if (Py_TYPE(obj)->tp_getattro != PyObject_GenericGetAttr |
| || !PyUnicode_Check(name)) { |
| *method = PyObject_GetAttr(obj, name); |
| return 0; |
| } |
| |
| if (tp->tp_dict == NULL && PyType_Ready(tp) < 0) |
| return 0; |
| |
| descr = _PyType_Lookup(tp, name); |
| 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; |
| } |
| } |
| } |
| |
| dictptr = _PyObject_GetDictPtr(obj); |
| if (dictptr != NULL && (dict = *dictptr) != NULL) { |
| Py_INCREF(dict); |
| attr = PyDict_GetItemWithError(dict, name); |
| if (attr != NULL) { |
| Py_INCREF(attr); |
| *method = attr; |
| Py_DECREF(dict); |
| Py_XDECREF(descr); |
| return 0; |
| } |
| else { |
| 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); |
| 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, NAME) \ |
| do { \ |
| if (PyType_Ready(TYPE) < 0) { \ |
| return _PyStatus_ERR("Can't initialize " NAME " type"); \ |
| } \ |
| } while (0) |
| |
| INIT_TYPE(&PyBaseObject_Type, "object"); |
| INIT_TYPE(&PyType_Type, "type"); |
| INIT_TYPE(&_PyWeakref_RefType, "weakref"); |
| INIT_TYPE(&_PyWeakref_CallableProxyType, "callable weakref proxy"); |
| INIT_TYPE(&_PyWeakref_ProxyType, "weakref proxy"); |
| INIT_TYPE(&PyLong_Type, "int"); |
| INIT_TYPE(&PyBool_Type, "bool"); |
| INIT_TYPE(&PyByteArray_Type, "bytearray"); |
| INIT_TYPE(&PyBytes_Type, "str"); |
| INIT_TYPE(&PyList_Type, "list"); |
| INIT_TYPE(&_PyNone_Type, "None"); |
| INIT_TYPE(&_PyNotImplemented_Type, "NotImplemented"); |
| INIT_TYPE(&PyTraceBack_Type, "traceback"); |
| INIT_TYPE(&PySuper_Type, "super"); |
| INIT_TYPE(&PyRange_Type, "range"); |
| INIT_TYPE(&PyDict_Type, "dict"); |
| INIT_TYPE(&PyDictKeys_Type, "dict keys"); |
| INIT_TYPE(&PyDictValues_Type, "dict values"); |
| INIT_TYPE(&PyDictItems_Type, "dict items"); |
| INIT_TYPE(&PyDictRevIterKey_Type, "reversed dict keys"); |
| INIT_TYPE(&PyDictRevIterValue_Type, "reversed dict values"); |
| INIT_TYPE(&PyDictRevIterItem_Type, "reversed dict items"); |
| INIT_TYPE(&PyODict_Type, "OrderedDict"); |
| INIT_TYPE(&PyODictKeys_Type, "odict_keys"); |
| INIT_TYPE(&PyODictItems_Type, "odict_items"); |
| INIT_TYPE(&PyODictValues_Type, "odict_values"); |
| INIT_TYPE(&PyODictIter_Type, "odict_keyiterator"); |
| INIT_TYPE(&PySet_Type, "set"); |
| INIT_TYPE(&PyUnicode_Type, "str"); |
| INIT_TYPE(&PySlice_Type, "slice"); |
| INIT_TYPE(&PyStaticMethod_Type, "static method"); |
| INIT_TYPE(&PyComplex_Type, "complex"); |
| INIT_TYPE(&PyFloat_Type, "float"); |
| INIT_TYPE(&PyFrozenSet_Type, "frozenset"); |
| INIT_TYPE(&PyProperty_Type, "property"); |
| INIT_TYPE(&_PyManagedBuffer_Type, "managed buffer"); |
| INIT_TYPE(&PyMemoryView_Type, "memoryview"); |
| INIT_TYPE(&PyTuple_Type, "tuple"); |
| INIT_TYPE(&PyEnum_Type, "enumerate"); |
| INIT_TYPE(&PyReversed_Type, "reversed"); |
| INIT_TYPE(&PyStdPrinter_Type, "StdPrinter"); |
| INIT_TYPE(&PyCode_Type, "code"); |
| INIT_TYPE(&PyFrame_Type, "frame"); |
| INIT_TYPE(&PyCFunction_Type, "builtin function"); |
| INIT_TYPE(&PyCMethod_Type, "builtin method"); |
| INIT_TYPE(&PyMethod_Type, "method"); |
| INIT_TYPE(&PyFunction_Type, "function"); |
| INIT_TYPE(&PyDictProxy_Type, "dict proxy"); |
| INIT_TYPE(&PyGen_Type, "generator"); |
| INIT_TYPE(&PyGetSetDescr_Type, "get-set descriptor"); |
| INIT_TYPE(&PyWrapperDescr_Type, "wrapper"); |
| INIT_TYPE(&_PyMethodWrapper_Type, "method wrapper"); |
| INIT_TYPE(&PyEllipsis_Type, "ellipsis"); |
| INIT_TYPE(&PyMemberDescr_Type, "member descriptor"); |
| INIT_TYPE(&_PyNamespace_Type, "namespace"); |
| INIT_TYPE(&PyCapsule_Type, "capsule"); |
| INIT_TYPE(&PyLongRangeIter_Type, "long range iterator"); |
| INIT_TYPE(&PyCell_Type, "cell"); |
| INIT_TYPE(&PyInstanceMethod_Type, "instance method"); |
| INIT_TYPE(&PyClassMethodDescr_Type, "class method descr"); |
| INIT_TYPE(&PyMethodDescr_Type, "method descr"); |
| INIT_TYPE(&PyCallIter_Type, "call iter"); |
| INIT_TYPE(&PySeqIter_Type, "sequence iterator"); |
| INIT_TYPE(&PyPickleBuffer_Type, "pickle.PickleBuffer"); |
| INIT_TYPE(&PyCoro_Type, "coroutine"); |
| INIT_TYPE(&_PyCoroWrapper_Type, "coroutine wrapper"); |
| INIT_TYPE(&_PyInterpreterID_Type, "interpreter ID"); |
| 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. */ |
| |
| /* Add op to the _PyTrash_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. |
| */ |
| void |
| _PyTrash_deposit_object(PyObject *op) |
| { |
| PyInterpreterState *interp = _PyInterpreterState_GET(); |
| struct _gc_runtime_state *gcstate = &interp->gc; |
| |
| _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), gcstate->trash_delete_later); |
| gcstate->trash_delete_later = op; |
| } |
| |
| /* The equivalent API, using per-thread state recursion info */ |
| 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 _PyTrash_delete_later list. Called when |
| * the call-stack unwinds again. |
| */ |
| void |
| _PyTrash_destroy_chain(void) |
| { |
| PyInterpreterState *interp = _PyInterpreterState_GET(); |
| struct _gc_runtime_state *gcstate = &interp->gc; |
| |
| while (gcstate->trash_delete_later) { |
| PyObject *op = gcstate->trash_delete_later; |
| destructor dealloc = Py_TYPE(op)->tp_dealloc; |
| |
| gcstate->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); |
| ++gcstate->trash_delete_nesting; |
| (*dealloc)(op); |
| --gcstate->trash_delete_nesting; |
| } |
| } |
| |
| /* The equivalent API, using per-thread state recursion info */ |
| 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); |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |