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py: Fix bug where GC collected native/viper/asm function data.

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Because (for Thumb) a function pointer has the LSB set, pointers to
dynamic functions in RAM (eg native, viper or asm functions) were not
being traced by the GC.  This patch is a comprehensive fix for this.

Addresses issue #820.
This commit is contained in:
Damien George
2014-08-24 16:28:17 +01:00
parent 25fc41dd31
commit 3c658a4e75
22 changed files with 208 additions and 121 deletions
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2
py/objtype.c
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@@ -791,7 +791,7 @@ mp_obj_t mp_obj_new_type(qstr name, mp_obj_t bases_tuple, mp_obj_t locals_dict)
mp_map_elem_t *elem = mp_map_lookup(locals_map, MP_OBJ_NEW_QSTR(MP_QSTR___new__), MP_MAP_LOOKUP);
if (elem != NULL) {
// __new__ slot exists; check if it is a function
if (MP_OBJ_IS_TYPE(elem->value, &mp_type_fun_native) || MP_OBJ_IS_TYPE(elem->value, &mp_type_fun_bc)) {
if (MP_OBJ_IS_FUN(elem->value)) {
// __new__ is a function, wrap it in a staticmethod decorator
elem->value = static_class_method_make_new((mp_obj_t)&mp_type_staticmethod, 1, 0, &elem->value);
}