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bpo-45637: Store the frame pointer in the cframe (GH-29267)

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* Rename 'frame' to 'current_frame'
This commit is contained in:
Mark Shannon 2021-10-28 13:59:11 +01:00 • committed by GitHub
parent 0a68b3603f
commit f291404a80
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GPG key ID: 4AEE18F83AFDEB23
10 changed files with 42 additions and 41 deletions
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47
Python/ceval.c
View file

@ -1561,8 +1561,9 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, InterpreterFrame *frame, int thr
tstate->cframe = &cframe;
assert(frame->depth == 0);
/* push frame */
tstate->frame = frame;
/* Push frame */
frame->previous = prev_cframe->current_frame;
cframe.current_frame = frame;
start_frame:
if (_Py_EnterRecursiveCall(tstate, "")) {
@ -1570,7 +1571,8 @@ start_frame:
goto exit_eval_frame;
}
assert(frame == tstate->frame);
assert(tstate->cframe == &cframe);
assert(frame == cframe.current_frame);
if (cframe.use_tracing) {
if (trace_function_entry(tstate, frame)) {
@ -4641,8 +4643,9 @@ check_eval_breaker:
goto error;
}
_PyFrame_SetStackPointer(frame, stack_pointer);
new_frame->previous = frame;
cframe.current_frame = frame = new_frame;
new_frame->depth = frame->depth + 1;
tstate->frame = frame = new_frame;
goto start_frame;
}
}
@ -4723,9 +4726,9 @@ check_eval_breaker:
STACK_SHRINK(1);
Py_DECREF(func);
_PyFrame_SetStackPointer(frame, stack_pointer);
new_frame->previous = tstate->frame;
new_frame->previous = frame;
frame = cframe.current_frame = new_frame;
new_frame->depth = frame->depth + 1;
tstate->frame = frame = new_frame;
goto start_frame;
}
@ -5258,11 +5261,12 @@ exit_eval_frame:
_Py_LeaveRecursiveCall(tstate);
if (frame->depth) {
_PyFrame_StackPush(frame->previous, retval);
cframe.current_frame = frame->previous;
_PyFrame_StackPush(cframe.current_frame, retval);
if (_PyEvalFrameClearAndPop(tstate, frame)) {
retval = NULL;
}
frame = tstate->frame;
frame = cframe.current_frame;
if (retval == NULL) {
assert(_PyErr_Occurred(tstate));
throwflag = 1;
@ -5270,11 +5274,11 @@ exit_eval_frame:
retval = NULL;
goto resume_frame;
}
tstate->frame = frame->previous;
/* Restore previous cframe */
/* Restore previous cframe. */
tstate->cframe = cframe.previous;
tstate->cframe->use_tracing = cframe.use_tracing;
assert(tstate->cframe->current_frame == frame->previous);
return _Py_CheckFunctionResult(tstate, NULL, retval, __func__);
}
@ -5891,8 +5895,6 @@ _PyEvalFramePushAndInit(PyThreadState *tstate, PyFrameConstructor *con,
_PyFrame_Clear(frame, 0);
return NULL;
}
frame->previous = tstate->frame;
tstate->frame = frame;
return frame;
}
@ -5906,7 +5908,6 @@ _PyEvalFrameClearAndPop(PyThreadState *tstate, InterpreterFrame * frame)
return -1;
}
--tstate->recursion_depth;
tstate->frame = frame->previous;
_PyThreadState_PopFrame(tstate, frame);
return 0;
}
@ -6518,17 +6519,17 @@ InterpreterFrame *
_PyEval_GetFrame(void)
{
PyThreadState *tstate = _PyThreadState_GET();
return tstate->frame;
return tstate->cframe->current_frame;
}
PyFrameObject *
PyEval_GetFrame(void)
{
PyThreadState *tstate = _PyThreadState_GET();
if (tstate->frame == NULL) {
if (tstate->cframe->current_frame == NULL) {
return NULL;
}
PyFrameObject *f = _PyFrame_GetFrameObject(tstate->frame);
PyFrameObject *f = _PyFrame_GetFrameObject(tstate->cframe->current_frame);
if (f == NULL) {
PyErr_Clear();
}
@ -6538,7 +6539,7 @@ PyEval_GetFrame(void)
PyObject *
_PyEval_GetBuiltins(PyThreadState *tstate)
{
InterpreterFrame *frame = tstate->frame;
InterpreterFrame *frame = tstate->cframe->current_frame;
if (frame != NULL) {
return frame->f_builtins;
}
@ -6571,7 +6572,7 @@ PyObject *
PyEval_GetLocals(void)
{
PyThreadState *tstate = _PyThreadState_GET();
InterpreterFrame *current_frame = tstate->frame;
InterpreterFrame *current_frame = tstate->cframe->current_frame;
if (current_frame == NULL) {
_PyErr_SetString(tstate, PyExc_SystemError, "frame does not exist");
return NULL;
@ -6590,7 +6591,7 @@ PyObject *
PyEval_GetGlobals(void)
{
PyThreadState *tstate = _PyThreadState_GET();
InterpreterFrame *current_frame = tstate->frame;
InterpreterFrame *current_frame = tstate->cframe->current_frame;
if (current_frame == NULL) {
return NULL;
}
@ -6601,7 +6602,7 @@ int
PyEval_MergeCompilerFlags(PyCompilerFlags *cf)
{
PyThreadState *tstate = _PyThreadState_GET();
InterpreterFrame *current_frame = tstate->frame;
InterpreterFrame *current_frame = tstate->cframe->current_frame;
int result = cf->cf_flags != 0;
if (current_frame != NULL) {
@ -6651,7 +6652,7 @@ PyEval_GetFuncDesc(PyObject *func)
#define C_TRACE(x, call) \
if (use_tracing && tstate->c_profilefunc) { \
if (call_trace(tstate->c_profilefunc, tstate->c_profileobj, \
tstate, tstate->frame, \
tstate, tstate->cframe->current_frame, \
PyTrace_C_CALL, func)) { \
x = NULL; \
} \
@ -6661,13 +6662,13 @@ if (use_tracing && tstate->c_profilefunc) { \
if (x == NULL) { \
call_trace_protected(tstate->c_profilefunc, \
tstate->c_profileobj, \
tstate, tstate->frame, \
tstate, tstate->cframe->current_frame, \
PyTrace_C_EXCEPTION, func); \
/* XXX should pass (type, value, tb) */ \
} else { \
if (call_trace(tstate->c_profilefunc, \
tstate->c_profileobj, \
tstate, tstate->frame, \
tstate, tstate->cframe->current_frame, \
PyTrace_C_RETURN, func)) { \
Py_DECREF(x); \
x = NULL; \

2
Python/pylifecycle.c
View file

@ -2031,7 +2031,7 @@ Py_EndInterpreter(PyThreadState *tstate)
if (tstate != _PyThreadState_GET()) {
Py_FatalError("thread is not current");
}
if (tstate->frame != NULL) {
if (tstate->cframe->current_frame != NULL) {
Py_FatalError("thread still has a frame");
}
interp->finalizing = 1;

10
Python/pystate.c
View file

@ -636,12 +636,12 @@ new_threadstate(PyInterpreterState *interp, int init)
tstate->interp = interp;
tstate->frame = NULL;
tstate->recursion_depth = 0;
tstate->recursion_headroom = 0;
tstate->stackcheck_counter = 0;
tstate->tracing = 0;
tstate->root_cframe.use_tracing = 0;
tstate->root_cframe.current_frame = NULL;
tstate->cframe = &tstate->root_cframe;
tstate->gilstate_counter = 0;
tstate->async_exc = NULL;
@ -861,7 +861,7 @@ PyThreadState_Clear(PyThreadState *tstate)
{
int verbose = _PyInterpreterState_GetConfig(tstate->interp)->verbose;
if (verbose && tstate->frame != NULL) {
if (verbose && tstate->cframe->current_frame != NULL) {
/* bpo-20526: After the main thread calls
_PyRuntimeState_SetFinalizing() in Py_FinalizeEx(), threads must
exit when trying to take the GIL. If a thread exit in the middle of
@ -1134,10 +1134,10 @@ PyFrameObject*
PyThreadState_GetFrame(PyThreadState *tstate)
{
assert(tstate != NULL);
if (tstate->frame == NULL) {
if (tstate->cframe->current_frame == NULL) {
return NULL;
}
PyFrameObject *frame = _PyFrame_GetFrameObject(tstate->frame);
PyFrameObject *frame = _PyFrame_GetFrameObject(tstate->cframe->current_frame);
if (frame == NULL) {
PyErr_Clear();
}
@ -1277,7 +1277,7 @@ _PyThread_CurrentFrames(void)
for (i = runtime->interpreters.head; i != NULL; i = i->next) {
PyThreadState *t;
for (t = i->tstate_head; t != NULL; t = t->next) {
InterpreterFrame *frame = t->frame;
InterpreterFrame *frame = t->cframe->current_frame;
if (frame == NULL) {
continue;
}

2
Python/sysmodule.c
View file

@ -1813,7 +1813,7 @@ sys__getframe_impl(PyObject *module, int depth)
/*[clinic end generated code: output=d438776c04d59804 input=c1be8a6464b11ee5]*/
{
PyThreadState *tstate = _PyThreadState_GET();
InterpreterFrame *frame = tstate->frame;
InterpreterFrame *frame = tstate->cframe->current_frame;
if (_PySys_Audit(tstate, "sys._getframe", NULL) < 0) {
return NULL;

2
Python/traceback.c
View file

@ -1082,7 +1082,7 @@ dump_traceback(int fd, PyThreadState *tstate, int write_header)
PUTS(fd, "Stack (most recent call first):\n");
}
frame = tstate->frame;
frame = tstate->cframe->current_frame;
if (frame == NULL) {
PUTS(fd, " <no Python frame>\n");
return;