8157181: Compilers accept modification of final fields outside initializer methods
Summary: Track initialized final field updates; disable constant folding if an update is detected. Enforce final field update rules introduced by JVMS-7 (but only for JDK 9).
Reviewed-by: vlivanov, dnsimon, forax, never, kvn, coleenp
/*
* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#ifndef SHARE_VM_OOPS_TYPEARRAYKLASS_INLINE_HPP
#define SHARE_VM_OOPS_TYPEARRAYKLASS_INLINE_HPP
#include "oops/arrayKlass.hpp"
#include "oops/klass.hpp"
#include "oops/oop.inline.hpp"
#include "oops/typeArrayKlass.hpp"
#include "oops/typeArrayOop.hpp"
class ExtendedOopClosure;
inline void TypeArrayKlass::oop_oop_iterate_impl(oop obj, ExtendedOopClosure* closure) {
assert(obj->is_typeArray(),"must be a type array");
// Performance tweak: We skip iterating over the klass pointer since we
// know that Universe::TypeArrayKlass never moves.
}
template <bool nv, typename OopClosureType>
void TypeArrayKlass::oop_oop_iterate(oop obj, OopClosureType* closure) {
oop_oop_iterate_impl(obj, closure);
}
template <bool nv, typename OopClosureType>
void TypeArrayKlass::oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr) {
oop_oop_iterate_impl(obj, closure);
}
#define ALL_TYPE_ARRAY_KLASS_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \
OOP_OOP_ITERATE_DEFN( TypeArrayKlass, OopClosureType, nv_suffix) \
OOP_OOP_ITERATE_DEFN_BOUNDED( TypeArrayKlass, OopClosureType, nv_suffix) \
OOP_OOP_ITERATE_DEFN_NO_BACKWARDS(TypeArrayKlass, OopClosureType, nv_suffix)
#endif // SHARE_VM_OOPS_TYPEARRAYKLASS_INLINE_HPP