// Revised lookup semantics introduced 1.3 (Kestral beta)
void klassVtable::initialize_vtable(bool checkconstraints, TRAPS) {
// Note: Arrays can have intermediate array supers. Use java_super to skip them.
KlassHandle super (THREAD, klass()->java_super());
int nofNewEntries = 0;
if (PrintVtables && !klass()->oop_is_array()) {
ResourceMark rm(THREAD);
tty->print_cr("Initializing: %s", _klass->name()->as_C_string());
}
#ifdef ASSERT
oop* end_of_obj = (oop*)_klass() + _klass()->size();
oop* end_of_vtable = (oop*)&table()[_length];
assert(end_of_vtable <= end_of_obj, "vtable extends beyond end");
#endif
if (Universe::is_bootstrapping()) {
// just clear everything
for (int i = 0; i < _length; i++) table()[i].clear();
return;
}
int super_vtable_len = initialize_from_super(super);
if (klass()->oop_is_array()) {
assert(super_vtable_len == _length, "arrays shouldn't introduce new methods");
} else {
assert(_klass->oop_is_instance(), "must be instanceKlass");
objArrayHandle methods(THREAD, ik()->methods());
int len = methods()->length();
int initialized = super_vtable_len;
// update_inherited_vtable can stop for gc - ensure using handles
for (int i = 0; i < len; i++) {
HandleMark hm(THREAD);
assert(methods()->obj_at(i)->is_method(), "must be a methodOop");
methodHandle mh(THREAD, (methodOop)methods()->obj_at(i));
bool needs_new_entry = update_inherited_vtable(ik(), mh, super_vtable_len, checkconstraints, CHECK);
if (needs_new_entry) {
put_method_at(mh(), initialized);
mh()->set_vtable_index(initialized); // set primary vtable index
initialized++;
}
}
// add miranda methods; it will also update the value of initialized
fill_in_mirandas(initialized);
// In class hierarchies where the accessibility is not increasing (i.e., going from private ->
// package_private -> publicprotected), the vtable might actually be smaller than our initial
// calculation.
assert(initialized <= _length, "vtable initialization failed");
for(;initialized < _length; initialized++) {
put_method_at(NULL, initialized);
}
NOT_PRODUCT(verify(tty, true));
}
}
inline instanceKlass* klassVtable::ik() const {
Klass* k = _klass()->klass_part();
assert(k->oop_is_instance(), "not an instanceKlass");
return (instanceKlass*)k;
}
// accessors
vtableEntry* table() const { return (vtableEntry*)(address(_klass()) + _tableOffset); }