diff options
Diffstat (limited to 'Python/ceval.c')
| -rw-r--r-- | Python/ceval.c | 250 |
1 files changed, 215 insertions, 35 deletions
diff --git a/Python/ceval.c b/Python/ceval.c index c777e7944f6..50665defd38 100644 --- a/Python/ceval.c +++ b/Python/ceval.c @@ -8,7 +8,7 @@ #include "pycore_backoff.h" #include "pycore_call.h" // _PyObject_CallNoArgs() #include "pycore_cell.h" // PyCell_GetRef() -#include "pycore_ceval.h" +#include "pycore_ceval.h" // SPECIAL___ENTER__ #include "pycore_code.h" #include "pycore_dict.h" #include "pycore_emscripten_signal.h" // _Py_CHECK_EMSCRIPTEN_SIGNALS @@ -139,6 +139,19 @@ #endif +static void +check_invalid_reentrancy(void) +{ +#if defined(Py_DEBUG) && defined(Py_GIL_DISABLED) + // In the free-threaded build, the interpreter must not be re-entered if + // the world-is-stopped. If so, that's a bug somewhere (quite likely in + // the painfully complex typeobject code). + PyInterpreterState *interp = _PyInterpreterState_GET(); + assert(!interp->stoptheworld.world_stopped); +#endif +} + + #ifdef Py_DEBUG static void dump_item(_PyStackRef item) @@ -333,13 +346,13 @@ _Py_ReachedRecursionLimitWithMargin(PyThreadState *tstate, int margin_count) { uintptr_t here_addr = _Py_get_machine_stack_pointer(); _PyThreadStateImpl *_tstate = (_PyThreadStateImpl *)tstate; - if (here_addr > _tstate->c_stack_soft_limit + margin_count * PYOS_STACK_MARGIN_BYTES) { + if (here_addr > _tstate->c_stack_soft_limit + margin_count * _PyOS_STACK_MARGIN_BYTES) { return 0; } if (_tstate->c_stack_hard_limit == 0) { _Py_InitializeRecursionLimits(tstate); } - return here_addr <= _tstate->c_stack_soft_limit + margin_count * PYOS_STACK_MARGIN_BYTES; + return here_addr <= _tstate->c_stack_soft_limit + margin_count * _PyOS_STACK_MARGIN_BYTES; } void @@ -360,9 +373,6 @@ _Py_EnterRecursiveCallUnchecked(PyThreadState *tstate) # define Py_C_STACK_SIZE 1200000 #elif defined(__sparc__) # define Py_C_STACK_SIZE 1600000 -#elif defined(__wasi__) - /* Web assembly has two stacks, so this isn't really the stack depth */ -# define Py_C_STACK_SIZE 131072 // wasi-libc DEFAULT_STACK_SIZE #elif defined(__hppa__) || defined(__powerpc64__) # define Py_C_STACK_SIZE 2000000 #else @@ -438,8 +448,8 @@ _Py_InitializeRecursionLimits(PyThreadState *tstate) _tstate->c_stack_top = (uintptr_t)high; ULONG guarantee = 0; SetThreadStackGuarantee(&guarantee); - _tstate->c_stack_hard_limit = ((uintptr_t)low) + guarantee + PYOS_STACK_MARGIN_BYTES; - _tstate->c_stack_soft_limit = _tstate->c_stack_hard_limit + PYOS_STACK_MARGIN_BYTES; + _tstate->c_stack_hard_limit = ((uintptr_t)low) + guarantee + _PyOS_STACK_MARGIN_BYTES; + _tstate->c_stack_soft_limit = _tstate->c_stack_hard_limit + _PyOS_STACK_MARGIN_BYTES; #else uintptr_t here_addr = _Py_get_machine_stack_pointer(); # if defined(HAVE_PTHREAD_GETATTR_NP) && !defined(_AIX) && !defined(__NetBSD__) @@ -459,9 +469,9 @@ _Py_InitializeRecursionLimits(PyThreadState *tstate) // Thread sanitizer crashes if we use a bit more than half the stack. _tstate->c_stack_soft_limit = base + (stack_size / 2); #else - _tstate->c_stack_soft_limit = base + PYOS_STACK_MARGIN_BYTES * 2; + _tstate->c_stack_soft_limit = base + _PyOS_STACK_MARGIN_BYTES * 2; #endif - _tstate->c_stack_hard_limit = base + PYOS_STACK_MARGIN_BYTES; + _tstate->c_stack_hard_limit = base + _PyOS_STACK_MARGIN_BYTES; assert(_tstate->c_stack_soft_limit < here_addr); assert(here_addr < _tstate->c_stack_top); return; @@ -469,7 +479,7 @@ _Py_InitializeRecursionLimits(PyThreadState *tstate) # endif _tstate->c_stack_top = _Py_SIZE_ROUND_UP(here_addr, 4096); _tstate->c_stack_soft_limit = _tstate->c_stack_top - Py_C_STACK_SIZE; - _tstate->c_stack_hard_limit = _tstate->c_stack_top - (Py_C_STACK_SIZE + PYOS_STACK_MARGIN_BYTES); + _tstate->c_stack_hard_limit = _tstate->c_stack_top - (Py_C_STACK_SIZE + _PyOS_STACK_MARGIN_BYTES); #endif } @@ -990,10 +1000,16 @@ _PyObjectArray_Free(PyObject **array, PyObject **scratch) #define DONT_SLP_VECTORIZE #endif +typedef struct { + _PyInterpreterFrame frame; + _PyStackRef stack[1]; +} _PyEntryFrame; + PyObject* _Py_HOT_FUNCTION DONT_SLP_VECTORIZE _PyEval_EvalFrameDefault(PyThreadState *tstate, _PyInterpreterFrame *frame, int throwflag) { _Py_EnsureTstateNotNULL(tstate); + check_invalid_reentrancy(); CALL_STAT_INC(pyeval_calls); #if USE_COMPUTED_GOTOS && !Py_TAIL_CALL_INTERP @@ -1009,7 +1025,7 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, _PyInterpreterFrame *frame, int int oparg; /* Current opcode argument, if any */ assert(tstate->current_frame == NULL || tstate->current_frame->stackpointer != NULL); #endif - _PyInterpreterFrame entry_frame; + _PyEntryFrame entry; if (_Py_EnterRecursiveCallTstate(tstate, "")) { assert(frame->owner != FRAME_OWNED_BY_INTERPRETER); @@ -1021,30 +1037,37 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, _PyInterpreterFrame *frame, int * These are cached values from the frame and code object. */ _Py_CODEUNIT *next_instr; _PyStackRef *stack_pointer; - entry_frame.localsplus[0] = PyStackRef_NULL; + entry.stack[0] = PyStackRef_NULL; #ifdef Py_STACKREF_DEBUG - entry_frame.f_funcobj = PyStackRef_None; + entry.frame.f_funcobj = PyStackRef_None; #elif defined(Py_DEBUG) /* Set these to invalid but identifiable values for debugging. */ - entry_frame.f_funcobj = (_PyStackRef){.bits = 0xaaa0}; - entry_frame.f_locals = (PyObject*)0xaaa1; - entry_frame.frame_obj = (PyFrameObject*)0xaaa2; - entry_frame.f_globals = (PyObject*)0xaaa3; - entry_frame.f_builtins = (PyObject*)0xaaa4; + entry.frame.f_funcobj = (_PyStackRef){.bits = 0xaaa0}; + entry.frame.f_locals = (PyObject*)0xaaa1; + entry.frame.frame_obj = (PyFrameObject*)0xaaa2; + entry.frame.f_globals = (PyObject*)0xaaa3; + entry.frame.f_builtins = (PyObject*)0xaaa4; #endif - entry_frame.f_executable = PyStackRef_None; - entry_frame.instr_ptr = (_Py_CODEUNIT *)_Py_INTERPRETER_TRAMPOLINE_INSTRUCTIONS + 1; - entry_frame.stackpointer = entry_frame.localsplus; - entry_frame.owner = FRAME_OWNED_BY_INTERPRETER; - entry_frame.visited = 0; - entry_frame.return_offset = 0; + entry.frame.f_executable = PyStackRef_None; + entry.frame.instr_ptr = (_Py_CODEUNIT *)_Py_INTERPRETER_TRAMPOLINE_INSTRUCTIONS + 1; + entry.frame.stackpointer = entry.stack; + entry.frame.owner = FRAME_OWNED_BY_INTERPRETER; + entry.frame.visited = 0; + entry.frame.return_offset = 0; #ifdef Py_DEBUG - entry_frame.lltrace = 0; + entry.frame.lltrace = 0; #endif /* Push frame */ - entry_frame.previous = tstate->current_frame; - frame->previous = &entry_frame; + entry.frame.previous = tstate->current_frame; + frame->previous = &entry.frame; tstate->current_frame = frame; + entry.frame.localsplus[0] = PyStackRef_NULL; +#ifdef _Py_TIER2 + if (tstate->current_executor != NULL) { + entry.frame.localsplus[0] = PyStackRef_FromPyObjectNew(tstate->current_executor); + tstate->current_executor = NULL; + } +#endif /* support for generator.throw() */ if (throwflag) { @@ -1071,9 +1094,9 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, _PyInterpreterFrame *frame, int stack_pointer = _PyFrame_GetStackPointer(frame); #if Py_TAIL_CALL_INTERP # if Py_STATS - return _TAIL_CALL_error(frame, stack_pointer, tstate, next_instr, 0, lastopcode); + return _TAIL_CALL_error(frame, stack_pointer, tstate, next_instr, 0, lastopcode); # else - return _TAIL_CALL_error(frame, stack_pointer, tstate, next_instr, 0); + return _TAIL_CALL_error(frame, stack_pointer, tstate, next_instr, 0); # endif #else goto error; @@ -2723,10 +2746,9 @@ _PyEval_GetFrameLocals(void) return locals; } -PyObject * -PyEval_GetGlobals(void) +static PyObject * +_PyEval_GetGlobals(PyThreadState *tstate) { - PyThreadState *tstate = _PyThreadState_GET(); _PyInterpreterFrame *current_frame = _PyThreadState_GetFrame(tstate); if (current_frame == NULL) { return NULL; @@ -2734,6 +2756,120 @@ PyEval_GetGlobals(void) return current_frame->f_globals; } +PyObject * +PyEval_GetGlobals(void) +{ + PyThreadState *tstate = _PyThreadState_GET(); + return _PyEval_GetGlobals(tstate); +} + +PyObject * +_PyEval_GetGlobalsFromRunningMain(PyThreadState *tstate) +{ + if (!_PyInterpreterState_IsRunningMain(tstate->interp)) { + return NULL; + } + PyObject *mod = _Py_GetMainModule(tstate); + if (_Py_CheckMainModule(mod) < 0) { + Py_XDECREF(mod); + return NULL; + } + PyObject *globals = PyModule_GetDict(mod); // borrowed + Py_DECREF(mod); + return globals; +} + +static PyObject * +get_globals_builtins(PyObject *globals) +{ + PyObject *builtins = NULL; + if (PyDict_Check(globals)) { + if (PyDict_GetItemRef(globals, &_Py_ID(__builtins__), &builtins) < 0) { + return NULL; + } + } + else { + if (PyMapping_GetOptionalItem( + globals, &_Py_ID(__builtins__), &builtins) < 0) + { + return NULL; + } + } + return builtins; +} + +static int +set_globals_builtins(PyObject *globals, PyObject *builtins) +{ + if (PyDict_Check(globals)) { + if (PyDict_SetItem(globals, &_Py_ID(__builtins__), builtins) < 0) { + return -1; + } + } + else { + if (PyObject_SetItem(globals, &_Py_ID(__builtins__), builtins) < 0) { + return -1; + } + } + return 0; +} + +int +_PyEval_EnsureBuiltins(PyThreadState *tstate, PyObject *globals, + PyObject **p_builtins) +{ + PyObject *builtins = get_globals_builtins(globals); + if (builtins == NULL) { + if (_PyErr_Occurred(tstate)) { + return -1; + } + builtins = PyEval_GetBuiltins(); // borrowed + if (builtins == NULL) { + assert(_PyErr_Occurred(tstate)); + return -1; + } + Py_INCREF(builtins); + if (set_globals_builtins(globals, builtins) < 0) { + Py_DECREF(builtins); + return -1; + } + } + if (p_builtins != NULL) { + *p_builtins = builtins; + } + else { + Py_DECREF(builtins); + } + return 0; +} + +int +_PyEval_EnsureBuiltinsWithModule(PyThreadState *tstate, PyObject *globals, + PyObject **p_builtins) +{ + PyObject *builtins = get_globals_builtins(globals); + if (builtins == NULL) { + if (_PyErr_Occurred(tstate)) { + return -1; + } + builtins = PyImport_ImportModuleLevel("builtins", NULL, NULL, NULL, 0); + if (builtins == NULL) { + return -1; + } + if (set_globals_builtins(globals, builtins) < 0) { + Py_DECREF(builtins); + return -1; + } + } + if (p_builtins != NULL) { + *p_builtins = builtins; + } + else { + Py_DECREF(builtins); + } + return 0; +} + PyObject* PyEval_GetFrameLocals(void) { @@ -2956,7 +3092,7 @@ _PyEval_ImportFrom(PyThreadState *tstate, PyObject *v, PyObject *name) int is_possibly_shadowing_stdlib = 0; if (is_possibly_shadowing) { PyObject *stdlib_modules; - if (_PySys_GetOptionalAttrString("stdlib_module_names", &stdlib_modules) < 0) { + if (PySys_GetOptionalAttrString("stdlib_module_names", &stdlib_modules) < 0) { goto done; } if (stdlib_modules && PyAnySet_Check(stdlib_modules)) { @@ -3167,7 +3303,7 @@ _PyEval_FormatKwargsError(PyThreadState *tstate, PyObject *func, PyObject *kwarg else if (_PyErr_ExceptionMatches(tstate, PyExc_KeyError)) { PyObject *exc = _PyErr_GetRaisedException(tstate); PyObject *args = PyException_GetArgs(exc); - if (exc && PyTuple_Check(args) && PyTuple_GET_SIZE(args) == 1) { + if (PyTuple_Check(args) && PyTuple_GET_SIZE(args) == 1) { _PyErr_Clear(tstate); PyObject *funcstr = _PyObject_FunctionStr(func); if (funcstr != NULL) { @@ -3416,6 +3552,50 @@ _PyEval_LoadName(PyThreadState *tstate, _PyInterpreterFrame *frame, PyObject *na return value; } +static _PyStackRef +foriter_next(PyObject *seq, _PyStackRef index) +{ + assert(PyStackRef_IsTaggedInt(index)); + assert(PyTuple_CheckExact(seq) || PyList_CheckExact(seq)); + intptr_t i = PyStackRef_UntagInt(index); + if (PyTuple_CheckExact(seq)) { + size_t size = PyTuple_GET_SIZE(seq); + if ((size_t)i >= size) { + return PyStackRef_NULL; + } + return PyStackRef_FromPyObjectNew(PyTuple_GET_ITEM(seq, i)); + } + PyObject *item = _PyList_GetItemRef((PyListObject *)seq, i); + if (item == NULL) { + return PyStackRef_NULL; + } + return PyStackRef_FromPyObjectSteal(item); +} + +_PyStackRef _PyForIter_VirtualIteratorNext(PyThreadState* tstate, _PyInterpreterFrame* frame, _PyStackRef iter, _PyStackRef* index_ptr) +{ + PyObject *iter_o = PyStackRef_AsPyObjectBorrow(iter); + _PyStackRef index = *index_ptr; + if (PyStackRef_IsTaggedInt(index)) { + *index_ptr = PyStackRef_IncrementTaggedIntNoOverflow(index); + return foriter_next(iter_o, index); + } + PyObject *next_o = (*Py_TYPE(iter_o)->tp_iternext)(iter_o); + if (next_o == NULL) { + if (_PyErr_Occurred(tstate)) { + if (_PyErr_ExceptionMatches(tstate, PyExc_StopIteration)) { + _PyEval_MonitorRaise(tstate, frame, frame->instr_ptr); + _PyErr_Clear(tstate); + } + else { + return PyStackRef_ERROR; + } + } + return PyStackRef_NULL; + } + return PyStackRef_FromPyObjectSteal(next_o); +} + /* Check if a 'cls' provides the given special method. */ static inline int type_has_special_method(PyTypeObject *cls, PyObject *name) |