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/metaspaceShared.hpp"
  30 #include "memory/universe.hpp"
  31 #include "oops/markOop.inline.hpp"
  32 #include "oops/oop.inline.hpp"
  33 #if INCLUDE_ALL_GCS
  34 #include "gc/g1/g1Allocator.inline.hpp"
  35 #endif // INCLUDE_ALL_GCS
  36 
  37 inline bool MarkSweep::is_closed_archive_object(oop object) {
  38 #if INCLUDE_ALL_GCS
  39   return G1ArchiveAllocator::is_closed_archive_object(object);
  40 #else
  41   return false;
  42 #endif
  43 }
  44 
  45 inline bool MarkSweep::is_open_archive_object(oop object) {
  46 #if INCLUDE_ALL_GCS
  47   return G1ArchiveAllocator::is_open_archive_object(object);
  48 #else
  49   return false;
  50 #endif
  51 }
  52 
  53 inline bool MarkSweep::is_archive_object(oop object) {
  54 #if INCLUDE_ALL_GCS
  55   return G1ArchiveAllocator::is_archive_object(object);
  56 #else
  57   return false;
  58 #endif
  59 }
  60 
  61 inline int MarkSweep::adjust_pointers(oop obj) {
  62   return obj->oop_iterate_size(&MarkSweep::adjust_pointer_closure);
  63 }
  64 
  65 template <class T> inline void MarkSweep::adjust_pointer(T* p) {
  66   T heap_oop = oopDesc::load_heap_oop(p);
  67   if (!oopDesc::is_null(heap_oop)) {
  68     oop obj     = oopDesc::decode_heap_oop_not_null(heap_oop);
  69     assert(Universe::heap()->is_in(obj), "should be in heap");
  70 
  71     oop new_obj = oop(obj->mark()->decode_pointer());
  72 
  73     assert(is_archive_object(obj) ||             // no forwarding of archive objects
  74            new_obj != NULL ||                         // is forwarding ptr?
  75            obj->mark() == markOopDesc::prototype() || // not gc marked?
  76            (UseBiasedLocking && obj->mark()->has_bias_pattern()),
  77            // not gc marked?
  78            "should be forwarded");
  79 
  80 #ifndef PRODUCT
  81     // open_archive objects are marked by GC. Their mark should
  82     // not have forwarding ptr.
  83     if (is_open_archive_object(obj)) {
  84       assert(new_obj == NULL, "archive heap object has forwarding ptr");
  85     }
  86 #endif
  87 
  88     if (new_obj != NULL) {
  89       if (!is_closed_archive_object(obj)) {
  90         assert(Universe::heap()->is_in_reserved(new_obj),
  91               "should be in object space");
  92         oopDesc::encode_store_heap_oop_not_null(p, new_obj);
  93       }
  94     }
  95   }
  96 }
  97 
  98 #endif // SHARE_VM_GC_SERIAL_MARKSWEEP_INLINE_HPP