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gh-111968: Refactor _PyXXX_Fini to integrate with _PyObject_ClearFreeLists #114899

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merged 14 commits into from
Feb 10, 2024
Merged

gh-111968: Refactor _PyXXX_Fini to integrate with _PyObject_ClearFreeLists #114899

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c8a3d39
gh-111968: Refactor _PyXXX_Fini to follow Eric's suggestion
corona10 Feb 2, 2024
944929e
Remove _PyXXX_Fini
corona10 Feb 2, 2024
6ec90f5
nit
corona10 Feb 2, 2024
c4b3f4f
nit
corona10 Feb 2, 2024
c91a3e7
Refactor to use _PyObject_ClearFreeLists
corona10 Feb 2, 2024
16c72bf
nit
corona10 Feb 2, 2024
f4bdc2e
Add comment
corona10 Feb 2, 2024
47976a2
Fix
corona10 Feb 2, 2024
42ba4b9
fix
corona10 Feb 2, 2024
4585c90
Rename _PySlice_ClearCache to _PySlice_ClearFreeList
corona10 Feb 3, 2024
a121247
Address code review
corona10 Feb 3, 2024
845acac
Relocate _PyXXX_ClearFreeList declaration
corona10 Feb 3, 2024
bac40ea
Address code review
corona10 Feb 3, 2024
3f95c67
Merge remote-tracking branch 'upstream/main' into gh-111968-fini
corona10 Feb 10, 2024
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1 change: 0 additions & 1 deletion Include/internal/pycore_context.h
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Expand Up @@ -14,7 +14,6 @@ extern PyTypeObject _PyContextTokenMissing_Type;
/* runtime lifecycle */

PyStatus _PyContext_Init(PyInterpreterState *);
void _PyContext_Fini(_PyFreeListState *);


/* other API */
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1 change: 0 additions & 1 deletion Include/internal/pycore_floatobject.h
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Expand Up @@ -15,7 +15,6 @@ extern "C" {

extern void _PyFloat_InitState(PyInterpreterState *);
extern PyStatus _PyFloat_InitTypes(PyInterpreterState *);
extern void _PyFloat_Fini(_PyFreeListState *);
extern void _PyFloat_FiniType(PyInterpreterState *);


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10 changes: 10 additions & 0 deletions Include/internal/pycore_freelist.h
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Expand Up @@ -125,6 +125,16 @@ typedef struct _Py_freelist_state {
struct _Py_object_stack_state object_stacks;
} _PyFreeListState;

extern void _PyObject_ClearFreeLists(_PyFreeListState *state, int is_finalization);
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Since this API is not a domain-specific API, I located all ClearFreeList API into here :)

extern void _PyTuple_ClearFreeList(_PyFreeListState *state, int is_finalization);
extern void _PyFloat_ClearFreeList(_PyFreeListState *state, int is_finalization);
extern void _PyList_ClearFreeList(_PyFreeListState *state, int is_finalization);
extern void _PySlice_ClearFreeList(_PyFreeListState *state, int is_finalization);
extern void _PyDict_ClearFreeList(_PyFreeListState *state, int is_finalization);
extern void _PyAsyncGen_ClearFreeLists(_PyFreeListState *state, int is_finalization);
extern void _PyContext_ClearFreeList(_PyFreeListState *state, int is_finalization);
extern void _PyObjectStackChunk_ClearFreeList(_PyFreeListState *state, int is_finalization);

#ifdef __cplusplus
}
#endif
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8 changes: 0 additions & 8 deletions Include/internal/pycore_gc.h
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Expand Up @@ -262,14 +262,6 @@ extern PyObject *_PyGC_GetReferrers(PyInterpreterState *interp, PyObject *objs);

// Functions to clear types free lists
extern void _PyGC_ClearAllFreeLists(PyInterpreterState *interp);
extern void _Py_ClearFreeLists(_PyFreeListState *state, int is_finalization);
extern void _PyTuple_ClearFreeList(_PyFreeListState *state, int is_finalization);
extern void _PyFloat_ClearFreeList(_PyFreeListState *state, int is_finalization);
extern void _PyList_ClearFreeList(_PyFreeListState *state, int is_finalization);
extern void _PySlice_ClearCache(_PyFreeListState *state);
extern void _PyDict_ClearFreeList(_PyFreeListState *state, int is_finalization);
extern void _PyAsyncGen_ClearFreeLists(_PyFreeListState *state, int is_finalization);
extern void _PyContext_ClearFreeList(_PyFreeListState *state, int is_finalization);
extern void _Py_ScheduleGC(PyInterpreterState *interp);
extern void _Py_RunGC(PyThreadState *tstate);

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4 changes: 0 additions & 4 deletions Include/internal/pycore_genobject.h
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Expand Up @@ -26,10 +26,6 @@ extern PyTypeObject _PyCoroWrapper_Type;
extern PyTypeObject _PyAsyncGenWrappedValue_Type;
extern PyTypeObject _PyAsyncGenAThrow_Type;

/* runtime lifecycle */

extern void _PyAsyncGen_Fini(_PyFreeListState *);

#ifdef __cplusplus
}
#endif
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6 changes: 0 additions & 6 deletions Include/internal/pycore_list.h
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Expand Up @@ -13,12 +13,6 @@ extern "C" {
extern PyObject* _PyList_Extend(PyListObject *, PyObject *);
extern void _PyList_DebugMallocStats(FILE *out);


/* runtime lifecycle */

extern void _PyList_Fini(_PyFreeListState *);


#define _PyList_ITEMS(op) _Py_RVALUE(_PyList_CAST(op)->ob_item)

extern int
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3 changes: 0 additions & 3 deletions Include/internal/pycore_object_stack.h
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Expand Up @@ -32,9 +32,6 @@ _PyObjectStackChunk_New(void);
extern void
_PyObjectStackChunk_Free(_PyObjectStackChunk *);

extern void
_PyObjectStackChunk_ClearFreeList(_PyFreeListState *state, int is_finalization);

// Push an item onto the stack. Return -1 on allocation failure, 0 on success.
static inline int
_PyObjectStack_Push(_PyObjectStack *stack, PyObject *obj)
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2 changes: 0 additions & 2 deletions Include/internal/pycore_sliceobject.h
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Expand Up @@ -11,8 +11,6 @@ extern "C" {

/* runtime lifecycle */

extern void _PySlice_Fini(_PyFreeListState *);

extern PyObject *
_PyBuildSlice_ConsumeRefs(PyObject *start, PyObject *stop);

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1 change: 0 additions & 1 deletion Include/internal/pycore_tuple.h
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Expand Up @@ -14,7 +14,6 @@ extern void _PyTuple_DebugMallocStats(FILE *out);
/* runtime lifecycle */

extern PyStatus _PyTuple_InitGlobalObjects(PyInterpreterState *);
extern void _PyTuple_Fini(_PyFreeListState *);


/* other API */
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10 changes: 0 additions & 10 deletions Objects/floatobject.c
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Expand Up @@ -2010,16 +2010,6 @@ _PyFloat_ClearFreeList(_PyFreeListState *freelist_state, int is_finalization)
#endif
}

void
_PyFloat_Fini(_PyFreeListState *state)
{
// With Py_GIL_DISABLED:
// the freelists for the current thread state have already been cleared.
#ifndef Py_GIL_DISABLED
_PyFloat_ClearFreeList(state, 1);
#endif
}

void
_PyFloat_FiniType(PyInterpreterState *interp)
{
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11 changes: 0 additions & 11 deletions Objects/genobject.c
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Expand Up @@ -1682,17 +1682,6 @@ _PyAsyncGen_ClearFreeLists(_PyFreeListState *freelist_state, int is_finalization
#endif
}

void
_PyAsyncGen_Fini(_PyFreeListState *state)
{
// With Py_GIL_DISABLED:
// the freelists for the current thread state have already been cleared.
#ifndef Py_GIL_DISABLED
_PyAsyncGen_ClearFreeLists(state, 1);
#endif
}


static PyObject *
async_gen_unwrap_value(PyAsyncGenObject *gen, PyObject *result)
{
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10 changes: 0 additions & 10 deletions Objects/listobject.c
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Expand Up @@ -135,16 +135,6 @@ _PyList_ClearFreeList(_PyFreeListState *freelist_state, int is_finalization)
#endif
}

void
_PyList_Fini(_PyFreeListState *state)
{
// With Py_GIL_DISABLED:
// the freelists for the current thread state have already been cleared.
#ifndef Py_GIL_DISABLED
_PyList_ClearFreeList(state, 1);
#endif
}

/* Print summary info about the state of the optimized allocator */
void
_PyList_DebugMallocStats(FILE *out)
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15 changes: 15 additions & 0 deletions Objects/object.c
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Expand Up @@ -794,6 +794,21 @@ PyObject_Bytes(PyObject *v)
return PyBytes_FromObject(v);
}

void
_PyObject_ClearFreeLists(_PyFreeListState *state, int is_finalization)
{
// In the free-threaded build, freelists are per-PyThreadState and cleared in PyThreadState_Clear()
// In the default build, freelists are per-interpreter and cleared in finalize_interp_types()
_PyFloat_ClearFreeList(state, is_finalization);
_PyTuple_ClearFreeList(state, is_finalization);
_PyList_ClearFreeList(state, is_finalization);
_PyDict_ClearFreeList(state, is_finalization);
_PyContext_ClearFreeList(state, is_finalization);
_PyAsyncGen_ClearFreeLists(state, is_finalization);
// Only be cleared if is_finalization is true.
_PyObjectStackChunk_ClearFreeList(state, is_finalization);
_PySlice_ClearFreeList(state, is_finalization);
}

/*
def _PyObject_FunctionStr(x):
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12 changes: 4 additions & 8 deletions Objects/sliceobject.c
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Expand Up @@ -103,8 +103,11 @@ PyObject _Py_EllipsisObject = _PyObject_HEAD_INIT(&PyEllipsis_Type);

/* Slice object implementation */

void _PySlice_ClearCache(_PyFreeListState *state)
void _PySlice_ClearFreeList(_PyFreeListState *state, int is_finalization)
{
if (!is_finalization) {
return;
}
#ifdef WITH_FREELISTS
PySliceObject *obj = state->slices.slice_cache;
if (obj != NULL) {
Expand All @@ -114,13 +117,6 @@ void _PySlice_ClearCache(_PyFreeListState *state)
#endif
}

void _PySlice_Fini(_PyFreeListState *state)
{
#ifdef WITH_FREELISTS
_PySlice_ClearCache(state);
#endif
}

/* start, stop, and step are python objects with None indicating no
index is present.
*/
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5 changes: 0 additions & 5 deletions Objects/tupleobject.c
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Expand Up @@ -964,11 +964,6 @@ _PyTuple_Resize(PyObject **pv, Py_ssize_t newsize)

static void maybe_freelist_clear(_PyFreeListState *, int);

void
_PyTuple_Fini(_PyFreeListState *state)
{
maybe_freelist_clear(state, 1);
}

void
_PyTuple_ClearFreeList(_PyFreeListState *state, int is_finalization)
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11 changes: 0 additions & 11 deletions Python/context.c
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Expand Up @@ -1284,17 +1284,6 @@ _PyContext_ClearFreeList(_PyFreeListState *freelist_state, int is_finalization)
}


void
_PyContext_Fini(_PyFreeListState *state)
{
// With Py_GIL_DISABLED:
// the freelists for the current thread state have already been cleared.
#ifndef Py_GIL_DISABLED
_PyContext_ClearFreeList(state, 1);
#endif
}


PyStatus
_PyContext_Init(PyInterpreterState *interp)
{
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2 changes: 1 addition & 1 deletion Python/gc_free_threading.c
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Expand Up @@ -1679,7 +1679,7 @@ _PyGC_ClearAllFreeLists(PyInterpreterState *interp)
HEAD_LOCK(&_PyRuntime);
_PyThreadStateImpl *tstate = (_PyThreadStateImpl *)interp->threads.head;
while (tstate != NULL) {
_Py_ClearFreeLists(&tstate->freelist_state, 0);
_PyObject_ClearFreeLists(&tstate->freelist_state, 0);
tstate = (_PyThreadStateImpl *)tstate->base.next;
}
HEAD_UNLOCK(&_PyRuntime);
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2 changes: 1 addition & 1 deletion Python/gc_gil.c
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Expand Up @@ -11,7 +11,7 @@
void
_PyGC_ClearAllFreeLists(PyInterpreterState *interp)
{
_Py_ClearFreeLists(&interp->freelist_state, 0);
_PyObject_ClearFreeLists(&interp->freelist_state, 0);
}

#endif
12 changes: 5 additions & 7 deletions Python/pylifecycle.c
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Expand Up @@ -1782,16 +1782,14 @@ finalize_interp_types(PyInterpreterState *interp)
// a dict internally.
_PyUnicode_ClearInterned(interp);

_PyDict_Fini(interp);
_PyUnicode_Fini(interp);

#ifndef Py_GIL_DISABLED
// With Py_GIL_DISABLED:
// the freelists for the current thread state have already been cleared.
_PyFreeListState *state = _PyFreeListState_GET();
_PyTuple_Fini(state);
_PyList_Fini(state);
_PyFloat_Fini(state);
_PySlice_Fini(state);
_PyContext_Fini(state);
_PyAsyncGen_Fini(state);
_PyObject_ClearFreeLists(state, 1);
#endif

#ifdef Py_DEBUG
_PyStaticObjects_CheckRefcnt(interp);
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19 changes: 2 additions & 17 deletions Python/pystate.c
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Expand Up @@ -1458,20 +1458,6 @@ clear_datastack(PyThreadState *tstate)
}
}

void
_Py_ClearFreeLists(_PyFreeListState *state, int is_finalization)
{
// In the free-threaded build, freelists are per-PyThreadState and cleared in PyThreadState_Clear()
// In the default build, freelists are per-interpreter and cleared in finalize_interp_types()
_PyFloat_ClearFreeList(state, is_finalization);
_PyTuple_ClearFreeList(state, is_finalization);
_PyList_ClearFreeList(state, is_finalization);
_PyDict_ClearFreeList(state, is_finalization);
_PyContext_ClearFreeList(state, is_finalization);
_PyAsyncGen_ClearFreeLists(state, is_finalization);
_PyObjectStackChunk_ClearFreeList(state, is_finalization);
}

void
PyThreadState_Clear(PyThreadState *tstate)
{
Expand Down Expand Up @@ -1556,9 +1542,8 @@ PyThreadState_Clear(PyThreadState *tstate)
}
#ifdef Py_GIL_DISABLED
// Each thread should clear own freelists in free-threading builds.
_PyFreeListState *freelist_state = &((_PyThreadStateImpl*)tstate)->freelist_state;
_Py_ClearFreeLists(freelist_state, 1);
_PySlice_ClearCache(freelist_state);
_PyFreeListState *freelist_state = _PyFreeListState_GET();
_PyObject_ClearFreeLists(freelist_state, 1);
#endif

_PyThreadState_ClearMimallocHeaps(tstate);
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