src/hotspot/share/gc/serial/markSweep.inline.hpp
author rkennke
Thu, 05 Apr 2018 10:54:53 +0200
changeset 49722 a47d1e21b3f1
parent 49592 77fb0be7d19f
child 50728 9375184cec98
permissions -rw-r--r--
8199735: Mark word updates need to use Access API Reviewed-by: shade, eosterlund

/*
 * Copyright (c) 2000, 2018, 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.
 *
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#ifndef SHARE_VM_GC_SERIAL_MARKSWEEP_INLINE_HPP
#define SHARE_VM_GC_SERIAL_MARKSWEEP_INLINE_HPP

#include "gc/serial/markSweep.hpp"
#include "memory/metaspaceShared.hpp"
#include "memory/universe.hpp"
#include "oops/markOop.inline.hpp"
#include "oops/access.inline.hpp"
#include "oops/compressedOops.inline.hpp"
#include "oops/oop.inline.hpp"

inline int MarkSweep::adjust_pointers(oop obj) {
  return obj->oop_iterate_size(&MarkSweep::adjust_pointer_closure);
}

template <class T> inline void MarkSweep::adjust_pointer(T* p) {
  T heap_oop = RawAccess<>::oop_load(p);
  if (!CompressedOops::is_null(heap_oop)) {
    oop obj = CompressedOops::decode_not_null(heap_oop);
    assert(Universe::heap()->is_in(obj), "should be in heap");

    oop new_obj = oop(obj->mark_raw()->decode_pointer());

    assert(new_obj != NULL ||                         // is forwarding ptr?
           obj->mark_raw() == markOopDesc::prototype() || // not gc marked?
           (UseBiasedLocking && obj->mark_raw()->has_bias_pattern()),
           // not gc marked?
           "should be forwarded");

    if (new_obj != NULL) {
      assert(Universe::heap()->is_in_reserved(new_obj),
             "should be in object space");
      RawAccess<OOP_NOT_NULL>::oop_store(p, new_obj);
    }
  }
}

#endif // SHARE_VM_GC_SERIAL_MARKSWEEP_INLINE_HPP