aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/Python/sysmodule.c
diff options
context:
space:
mode:
authorMark Shannon <mark@hotpy.org>2021-07-26 11:22:16 +0100
committerGitHub <noreply@github.com>2021-07-26 11:22:16 +0100
commitae0a2b756255629140efcbe57fc2e714f0267aa3 (patch)
tree8710e8c7a398c9ec0add227fab607f367242a7e5 /Python/sysmodule.c
parent0363a4014d90df17a29042de008ef0b659f92505 (diff)
downloadcpython-ae0a2b756255629140efcbe57fc2e714f0267aa3.tar.gz
cpython-ae0a2b756255629140efcbe57fc2e714f0267aa3.zip
bpo-44590: Lazily allocate frame objects (GH-27077)
* Convert "specials" array to InterpreterFrame struct, adding f_lasti, f_state and other non-debug FrameObject fields to it. * Refactor, calls pushing the call to the interpreter upward toward _PyEval_Vector. * Compute f_back when on thread stack, only filling in value when frame object outlives stack invocation. * Move ownership of InterpreterFrame in generator from frame object to generator object. * Do not create frame objects for Python calls. * Do not create frame objects for generators.
Diffstat (limited to 'Python/sysmodule.c')
-rw-r--r--Python/sysmodule.c16
1 files changed, 7 insertions, 9 deletions
diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index f809e2fda56..5dfa917e8ff 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -29,6 +29,7 @@ Data members:
#include "code.h"
#include "frameobject.h" // PyFrame_GetBack()
+#include "pycore_frame.h"
#include "pydtrace.h"
#include "osdefs.h" // DELIM
#include "stdlib_module_names.h" // _Py_stdlib_module_names
@@ -1814,25 +1815,22 @@ sys__getframe_impl(PyObject *module, int depth)
/*[clinic end generated code: output=d438776c04d59804 input=c1be8a6464b11ee5]*/
{
PyThreadState *tstate = _PyThreadState_GET();
- PyFrameObject *f = PyThreadState_GetFrame(tstate);
+ InterpreterFrame *frame = tstate->frame;
- if (_PySys_Audit(tstate, "sys._getframe", "O", f) < 0) {
- Py_DECREF(f);
+ if (_PySys_Audit(tstate, "sys._getframe", NULL) < 0) {
return NULL;
}
- while (depth > 0 && f != NULL) {
- PyFrameObject *back = PyFrame_GetBack(f);
- Py_DECREF(f);
- f = back;
+ while (depth > 0 && frame != NULL) {
+ frame = frame->previous;
--depth;
}
- if (f == NULL) {
+ if (frame == NULL) {
_PyErr_SetString(tstate, PyExc_ValueError,
"call stack is not deep enough");
return NULL;
}
- return (PyObject*)f;
+ return _Py_XNewRef((PyObject *)_PyFrame_GetFrameObject(frame));
}
/*[clinic input]