1 /*
   2  * Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_GC_SERIAL_MARKSWEEP_INLINE_HPP
  26 #define SHARE_VM_GC_SERIAL_MARKSWEEP_INLINE_HPP
  27 
  28 #include "gc/serial/markSweep.hpp"
  29 #include "memory/universe.hpp"
  30 #include "oops/markOop.inline.hpp"
  31 #include "oops/oop.inline.hpp"
  32 #if INCLUDE_ALL_GCS
  33 #include "gc/g1/g1Allocator.inline.hpp"
  34 #endif // INCLUDE_ALL_GCS
  35 
  36 inline bool MarkSweep::is_archive_object(oop object) {
  37 #if INCLUDE_ALL_GCS
  38   return G1ArchiveAllocator::is_archive_object(object);
  39 #else
  40   return false;
  41 #endif
  42 }
  43 
  44 template <class T> inline void MarkSweep::adjust_pointer(T* p) {
  45   T heap_oop = oopDesc::load_heap_oop(p);
  46   if (!oopDesc::is_null(heap_oop)) {
  47     oop obj     = oopDesc::decode_heap_oop_not_null(heap_oop);
  48     assert(Universe::heap()->is_in(obj), "should be in heap");
  49 
  50     oop new_obj = oop(obj->mark()->decode_pointer());
  51     assert(is_archive_object(obj) ||                  // no forwarding of archive objects
  52            new_obj != NULL ||                         // is forwarding ptr?
  53            obj->mark() == markOopDesc::prototype() || // not gc marked?
  54            (UseBiasedLocking && obj->mark()->has_bias_pattern()),
  55            // not gc marked?
  56            "should be forwarded");
  57     if (new_obj != NULL) {
  58       if (!is_archive_object(obj)) {
  59         assert(Universe::heap()->is_in_reserved(new_obj),
  60               "should be in object space");
  61         oopDesc::encode_store_heap_oop_not_null(p, new_obj);
  62       }
  63     }
  64   }
  65 }
  66 
  67 #endif // SHARE_VM_GC_SERIAL_MARKSWEEP_INLINE_HPP