view src/share/vm/oops/instanceClassLoaderKlass.hpp @ 9057:b44df6c5942c

Added tag jdk8u232-ga for changeset 12177d88b89c
author andrew
date Tue, 15 Oct 2019 21:37:52 +0100
parents db9981fd3124
children
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/*
 * Copyright (c) 2011, 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_INSTANCECLASSLOADERKLASS_HPP
#define SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP

#include "oops/instanceKlass.hpp"
#include "utilities/macros.hpp"

// An InstanceClassLoaderKlass is a specialization of the InstanceKlass. It does
// not add any field.  It is added to walk the dependencies for the class loader
// key that this class loader points to.  This is how the loader_data graph is
// walked and dependant class loaders are kept alive.  I thought we walked
// the list later?

class InstanceClassLoaderKlass: public InstanceKlass {
  friend class VMStructs;
  friend class InstanceKlass;

  // Constructor
  InstanceClassLoaderKlass(int vtable_len, int itable_len, int static_field_size, int nonstatic_oop_map_size, ReferenceType rt, AccessFlags access_flags, bool is_anonymous)
    : InstanceKlass(vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, access_flags, is_anonymous) {}

public:
  virtual bool oop_is_instanceClassLoader() const { return true; }

  InstanceClassLoaderKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); }

  // Iterators
  int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) {
    return oop_oop_iterate_v(obj, blk);
  }
  int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) {
    return oop_oop_iterate_v_m(obj, blk, mr);
  }

#define InstanceClassLoaderKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix)                \
  int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk);                         \
  int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, MemRegion mr);

  ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceClassLoaderKlass_OOP_OOP_ITERATE_DECL)
  ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceClassLoaderKlass_OOP_OOP_ITERATE_DECL)

#if INCLUDE_ALL_GCS
#define InstanceClassLoaderKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix)      \
  int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk);

  ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceClassLoaderKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
  ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceClassLoaderKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
#endif // INCLUDE_ALL_GCS

    // Garbage collection
  void oop_follow_contents(oop obj);

  // Parallel Scavenge and Parallel Old
  PARALLEL_GC_DECLS
};

#endif // SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP