void
rb_check_frozen(VALUE obj)
{
if (OBJ_FROZEN(obj)) rb_error_frozen(rb_obj_classname(obj));
}
static rb_method_entry_t *
rb_add_method_def(VALUE klass, ID mid, rb_method_type_t type, rb_method_definition_t *def, rb_method_flag_t noex)
{
rb_method_entry_t *me;
st_table *mtbl;
st_data_t data;
if (NIL_P(klass)) {
klass = rb_cObject;
}
if (rb_safe_level() >= 4 &&
(klass == rb_cObject || !OBJ_UNTRUSTED(klass))) {
rb_raise(rb_eSecurityError, "Insecure: can't define method");
}
if (!FL_TEST(klass, FL_SINGLETON) &&
type != VM_METHOD_TYPE_NOTIMPLEMENTED &&
type != VM_METHOD_TYPE_ZSUPER &&
(mid == rb_intern("initialize") || mid == rb_intern("initialize_copy"))) {
noex = NOEX_PRIVATE | noex;
}
else if (FL_TEST(klass, FL_SINGLETON) &&
type == VM_METHOD_TYPE_CFUNC &&
mid == rb_intern("allocate")) {
rb_warn("defining %s.allocate is deprecated; use rb_define_alloc_func()",
rb_class2name(rb_ivar_get(klass, attached)));
mid = ID_ALLOCATOR;
}
if (OBJ_FROZEN(klass)) {
rb_error_frozen("class/module");
}
mtbl = RCLASS_M_TBL(klass);
/* check re-definition */
if (st_lookup(mtbl, mid, &data)) {
rb_method_entry_t *old_me = (rb_method_entry_t *)data;
rb_method_definition_t *old_def = old_me->def;
if (rb_method_definition_eq(old_def, def)) return old_me;
rb_vm_check_redefinition_opt_method(old_me);
if (RTEST(ruby_verbose) &&
type != VM_METHOD_TYPE_UNDEF &&
old_def->alias_count == 0 &&
old_def->type != VM_METHOD_TYPE_UNDEF &&
old_def->type != VM_METHOD_TYPE_ZSUPER) {
extern rb_iseq_t *rb_proc_get_iseq(VALUE proc, int *is_proc);
rb_iseq_t *iseq = 0;
rb_warning("method redefined; discarding old %s", rb_id2name(mid));
switch (old_def->type) {
case VM_METHOD_TYPE_ISEQ:
iseq = old_def->body.iseq;
break;
case VM_METHOD_TYPE_BMETHOD:
iseq = rb_proc_get_iseq(old_def->body.proc, 0);
break;
default:
break;
}
if (iseq && !NIL_P(iseq->filename)) {
int line = iseq->insn_info_table ? rb_iseq_first_lineno(iseq) : 0;
rb_compile_warning(RSTRING_PTR(iseq->filename), line,
"previous definition of %s was here",
rb_id2name(old_def->original_id));
}
}
rb_free_method_entry(old_me);
}
rb_clear_cache_by_id(mid);
me = ALLOC(rb_method_entry_t);
me->flag = NOEX_WITH_SAFE(noex);
me->called_id = mid;
me->klass = klass;
me->def = def;
if (def) def->alias_count++;
/* check mid */
if (klass == rb_cObject && mid == idInitialize) {
rb_warn("redefining Object#initialize may cause infinite loop");
}
/* check mid */
if (mid == object_id || mid == id__send__) {
if (type == VM_METHOD_TYPE_ISEQ) {
rb_warn("redefining `%s' may cause serious problems", rb_id2name(mid));
}
}
st_insert(mtbl, mid, (st_data_t) me);
return me;
}
