mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-09-26 18:29:57 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 10

gh-128954: Reorder _PyInterpreterFrame fields for reduced memory usage (#128958)

Browse source 
This reduces the size of _PyInterpreterFrame by 8 bytes on 64-bit
platforms using the free threading build due to alignment requirements.

This allows for slightly more recursive calls into the interpreter (from
C), but `test_call.test_super_deep` still crashes.
This commit is contained in:
Sam Gross 2025-01-27 12:14:51 -05:00 • committed by GitHub
parent 8a5a18a36e
commit a6a8c6f86e
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
2 changed files with 2 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

2
Include/internal/pycore_frame.h
View file

@ -69,11 +69,11 @@ typedef struct _PyInterpreterFrame {
PyObject *f_locals; /* Strong reference, may be NULL. Only valid if not on C stack */ PyObject *f_locals; /* Strong reference, may be NULL. Only valid if not on C stack */
PyFrameObject *frame_obj; /* Strong reference, may be NULL. Only valid if not on C stack */ PyFrameObject *frame_obj; /* Strong reference, may be NULL. Only valid if not on C stack */
_Py_CODEUNIT *instr_ptr; /* Instruction currently executing (or about to begin) */ _Py_CODEUNIT *instr_ptr; /* Instruction currently executing (or about to begin) */
_PyStackRef *stackpointer;
#ifdef Py_GIL_DISABLED #ifdef Py_GIL_DISABLED
/* Index of thread-local bytecode containing instr_ptr. */ /* Index of thread-local bytecode containing instr_ptr. */
int32_t tlbc_index; int32_t tlbc_index;
#endif #endif
_PyStackRef *stackpointer;
uint16_t return_offset; /* Only relevant during a function call */ uint16_t return_offset; /* Only relevant during a function call */
char owner; char owner;
#ifdef Py_DEBUG #ifdef Py_DEBUG

2
Lib/test/test_sys.py
View file

@ -1621,7 +1621,7 @@ class SizeofTest(unittest.TestCase):
return sys._getframe() return sys._getframe()
x = func() x = func()
if support.Py_GIL_DISABLED: if support.Py_GIL_DISABLED:
INTERPRETER_FRAME = '10PhcP' INTERPRETER_FRAME = '9PihcP'
else: else:
INTERPRETER_FRAME = '9PhcP' INTERPRETER_FRAME = '9PhcP'
check(x, size('3PiccPP' + INTERPRETER_FRAME + 'P')) check(x, size('3PiccPP' + INTERPRETER_FRAME + 'P'))