Commit: 6c86e1a781162e5a62955b136833ecf78010e2bc
Author: Campbell Barton
Date: Fri Oct 26 09:19:51 2018 +1100
Branches: blender2.8
https://developer.blender.org/rB6c86e1a781162e5a62955b136833ecf78010e2bc
PyAPI: draw handlers now store args in the capsule context
Was using the handlers custom-data which crashes
when Blender frees the screen data before Python removes the handler.
===================================================================
M source/blender/editors/include/ED_space_api.h
M source/blender/editors/space_api/spacetypes.c
M source/blender/python/intern/bpy_rna_callback.c
M source/blender/windowmanager/WM_api.h
M source/blender/windowmanager/intern/wm_operators.c
===================================================================
diff --git a/source/blender/editors/include/ED_space_api.h
b/source/blender/editors/include/ED_space_api.h
index ddd8b59c264..709af6e8b09 100644
--- a/source/blender/editors/include/ED_space_api.h
+++ b/source/blender/editors/include/ED_space_api.h
@@ -75,7 +75,6 @@ void *ED_region_draw_cb_activate(struct ARegionType *,
void *custumdata, int type);
void ED_region_draw_cb_draw(const struct bContext *, struct ARegion *, int);
void ED_region_draw_cb_exit(struct ARegionType *, void *);
-void *ED_region_draw_cb_customdata(void *handle);
/* generic callbacks */
/* ed_util.c */
void ED_region_draw_mouse_line_cb(const struct bContext *C, struct ARegion
*ar, void *arg_info);
diff --git a/source/blender/editors/space_api/spacetypes.c
b/source/blender/editors/space_api/spacetypes.c
index 91dff98f906..3e343d5e35a 100644
--- a/source/blender/editors/space_api/spacetypes.c
+++ b/source/blender/editors/space_api/spacetypes.c
@@ -266,11 +266,6 @@ void ED_region_draw_cb_exit(ARegionType *art, void *handle)
}
}
-void *ED_region_draw_cb_customdata(void *handle)
-{
- return ((RegionDrawCB *)handle)->customdata;
-}
-
void ED_region_draw_cb_draw(const bContext *C, ARegion *ar, int type)
{
RegionDrawCB *rdc;
diff --git a/source/blender/python/intern/bpy_rna_callback.c
b/source/blender/python/intern/bpy_rna_callback.c
index fd475ba503f..3a20ba385c6 100644
--- a/source/blender/python/intern/bpy_rna_callback.c
+++ b/source/blender/python/intern/bpy_rna_callback.c
@@ -296,7 +296,6 @@ PyObject *pyrna_callback_classmethod_add(PyObject
*UNUSED(self), PyObject *args)
wm,
params.space_type, params.region_type,
NULL, cb_wm_cursor_draw, (void *)args);
- Py_INCREF(args);
}
else if (RNA_struct_is_a(srna, &RNA_Space)) {
const char *error_prefix = "Space.draw_handler_add";
@@ -343,7 +342,6 @@ PyObject *pyrna_callback_classmethod_add(PyObject
*UNUSED(self), PyObject *args)
return NULL;
}
handle = ED_region_draw_cb_activate(art,
cb_region_draw, (void *)args, params.event);
- Py_INCREF(args);
}
}
}
@@ -352,7 +350,14 @@ PyObject *pyrna_callback_classmethod_add(PyObject
*UNUSED(self), PyObject *args)
return NULL;
}
- return PyCapsule_New((void *)handle, RNA_CAPSULE_ID, NULL);
+ PyObject *ret = PyCapsule_New((void *)handle, RNA_CAPSULE_ID, NULL);
+
+ /* Store 'args' in context as well as the handler custom-data,
+ * because the handle may be freed by Blender (new file, new window...
etc) */
+ PyCapsule_SetContext(ret, args);
+ Py_INCREF(args);
+
+ return ret;
}
PyObject *pyrna_callback_classmethod_remove(PyObject *UNUSED(self), PyObject
*args)
@@ -360,8 +365,8 @@ PyObject *pyrna_callback_classmethod_remove(PyObject
*UNUSED(self), PyObject *ar
PyObject *cls;
PyObject *py_handle;
void *handle;
- void *customdata;
StructRNA *srna;
+ bool capsule_clear = false;
if (PyTuple_GET_SIZE(args) < 2) {
PyErr_SetString(PyExc_ValueError, "callback_remove(handler):
expected at least 2 args");
@@ -378,6 +383,7 @@ PyObject *pyrna_callback_classmethod_remove(PyObject
*UNUSED(self), PyObject *ar
PyErr_SetString(PyExc_ValueError, "callback_remove(handler):
NULL handler given, invalid or already removed");
return NULL;
}
+ PyObject *handle_args = PyCapsule_GetContext(py_handle);
if (srna == &RNA_WindowManager) {
if (!PyArg_ParseTuple(
@@ -388,18 +394,8 @@ PyObject *pyrna_callback_classmethod_remove(PyObject
*UNUSED(self), PyObject *ar
}
bContext *C = BPy_GetContext();
struct wmWindowManager *wm = CTX_wm_manager(C);
-
- if (BLI_findindex(&wm->paintcursors, handle) == -1) {
- /* FIXME(campbell): window manager has freed cursor,
need to resolve refcount leak. */
- }
- else {
- customdata = WM_paint_cursor_customdata_get(handle);
- if (!WM_paint_cursor_end(wm, handle)) {
- PyErr_SetString(PyExc_ValueError,
"draw_cursor_remove(handler): cursor wasn't found");
- return NULL;
- }
- Py_DECREF((PyObject *)customdata);
- }
+ WM_paint_cursor_end(wm, handle);
+ capsule_clear = true;
}
else if (RNA_struct_is_a(srna, &RNA_Space)) {
const char *error_prefix = "Space.draw_handler_remove";
@@ -417,9 +413,6 @@ PyObject *pyrna_callback_classmethod_remove(PyObject
*UNUSED(self), PyObject *ar
return NULL;
}
- customdata = ED_region_draw_cb_customdata(handle);
- Py_DECREF((PyObject *)customdata);
-
if (pyrna_enum_value_from_id(
rna_enum_region_type_items, params.region_type_str,
¶ms.region_type, error_prefix) == -1)
@@ -440,6 +433,7 @@ PyObject *pyrna_callback_classmethod_remove(PyObject
*UNUSED(self), PyObject *ar
return NULL;
}
ED_region_draw_cb_exit(art, handle);
+ capsule_clear = true;
}
}
}
@@ -449,7 +443,10 @@ PyObject *pyrna_callback_classmethod_remove(PyObject
*UNUSED(self), PyObject *ar
}
/* don't allow reuse */
- PyCapsule_SetName(py_handle, RNA_CAPSULE_ID_INVALID);
+ if (capsule_clear) {
+ Py_DECREF(handle_args);
+ PyCapsule_SetName(py_handle, RNA_CAPSULE_ID_INVALID);
+ }
Py_RETURN_NONE;
}
diff --git a/source/blender/windowmanager/WM_api.h
b/source/blender/windowmanager/WM_api.h
index 4d3be1e3f3b..7628217d88f 100644
--- a/source/blender/windowmanager/WM_api.h
+++ b/source/blender/windowmanager/WM_api.h
@@ -179,7 +179,6 @@ struct wmPaintCursor *WM_paint_cursor_activate(
void *customdata);
bool WM_paint_cursor_end(struct wmWindowManager *wm, struct
wmPaintCursor *handle);
-void *WM_paint_cursor_customdata_get(struct wmPaintCursor *pc);
void WM_paint_cursor_tag_redraw(struct wmWindow *win, struct ARegion
*ar);
diff --git a/source/blender/windowmanager/intern/wm_operators.c
b/source/blender/windowmanager/intern/wm_operators.c
index e12107283a5..3be213796d8 100644
--- a/source/blender/windowmanager/intern/wm_operators.c
+++ b/source/blender/windowmanager/intern/wm_operators.c
@@ -1878,11 +1878,6 @@ bool WM_paint_cursor_end(wmWindowManager *wm,
wmPaintCursor *handle)
return false;
}
-void *WM_paint_cursor_customdata_get(wmPaintCursor *pc)
-{
- return pc->customdata;
-}
-
/* *********************** radial control ****************** */
#define WM_RADIAL_CONTROL_DISPLAY_SIZE (200 * UI_DPI_FAC)
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