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8148481: Devirtualize Klass::vtable

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Move remainder of vtable related methods to Klass

Reviewed-by: cjplummer, coleenp
This commit is contained in:
Mikael Gerdin 2016-01-19 12:07:32 +01:00
parent 211dc93a85
commit 3cda485fe5
12 changed files with 44 additions and 73 deletions
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18
hotspot/src/share/vm/oops/klass.cpp
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@ -659,6 +659,24 @@ void Klass::oop_verify_on(oop obj, outputStream* st) {
guarantee(obj->klass()->is_klass(), "klass field is not a klass");
}
klassVtable* Klass::vtable() const {
return new klassVtable(this, start_of_vtable(), vtable_length() / vtableEntry::size());
}
vtableEntry* Klass::start_of_vtable() const {
return (vtableEntry*) ((address)this + in_bytes(vtable_start_offset()));
}
Method* Klass::method_at_vtable(int index) {
#ifndef PRODUCT
assert(index >= 0, "valid vtable index");
if (DebugVtables) {
verify_vtable_index(index);
}
#endif
return start_of_vtable()[index].method();
}
ByteSize Klass::vtable_start_offset() {
return in_ByteSize(InstanceKlass::header_size() * wordSize);
}