jdk8-mips64-public/hotspot: src/share/vm/memory/genOopClosures.inline.hpp@d1605aabd0a1

6719955: Update copyright year
Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell

     1 /*

     2  * Copyright 2001-2008 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    25 inline OopsInGenClosure::OopsInGenClosure(Generation* gen) :

    26   OopClosure(gen->ref_processor()), _orig_gen(gen), _rs(NULL) {

    27   set_generation(gen);

    28 }

    30 inline void OopsInGenClosure::set_generation(Generation* gen) {

    31   _gen = gen;

    32   _gen_boundary = _gen->reserved().start();

    33   // Barrier set for the heap, must be set after heap is initialized

    34   if (_rs == NULL) {

    35     GenRemSet* rs = SharedHeap::heap()->rem_set();

    36     assert(rs->rs_kind() == GenRemSet::CardTable, "Wrong rem set kind");

    37     _rs = (CardTableRS*)rs;

    38   }

    39 }

    41 template <class T> inline void OopsInGenClosure::do_barrier(T* p) {

    42   assert(generation()->is_in_reserved(p), "expected ref in generation");

    43   assert(!oopDesc::is_null(*p), "expected non-null object");

    44   oop obj = oopDesc::load_decode_heap_oop_not_null(p);

    45   // If p points to a younger generation, mark the card.

    46   if ((HeapWord*)obj < _gen_boundary) {

    47     _rs->inline_write_ref_field_gc(p, obj);

    48   }

    49 }

    51 // NOTE! Any changes made here should also be made

    52 // in FastScanClosure::do_oop_work()

    53 template <class T> inline void ScanClosure::do_oop_work(T* p) {

    54   T heap_oop = oopDesc::load_heap_oop(p);

    55   // Should we copy the obj?

    56   if (!oopDesc::is_null(heap_oop)) {

    57     oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);

    58     if ((HeapWord*)obj < _boundary) {

    59       assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?");

    60       oop new_obj = obj->is_forwarded() ? obj->forwardee()

    61                                         : _g->copy_to_survivor_space(obj);

    62       oopDesc::encode_store_heap_oop_not_null(p, new_obj);

    63     }

    64     if (_gc_barrier) {

    65       // Now call parent closure

    66       do_barrier(p);

    67     }

    68   }

    69 }

    71 inline void ScanClosure::do_oop_nv(oop* p)       { ScanClosure::do_oop_work(p); }

    72 inline void ScanClosure::do_oop_nv(narrowOop* p) { ScanClosure::do_oop_work(p); }

    74 // NOTE! Any changes made here should also be made

    75 // in ScanClosure::do_oop_work()

    76 template <class T> inline void FastScanClosure::do_oop_work(T* p) {

    77   T heap_oop = oopDesc::load_heap_oop(p);

    78   // Should we copy the obj?

    79   if (!oopDesc::is_null(heap_oop)) {

    80     oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);

    81     if ((HeapWord*)obj < _boundary) {

    82       assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?");

    83       oop new_obj = obj->is_forwarded() ? obj->forwardee()

    84                                         : _g->copy_to_survivor_space(obj);

    85       oopDesc::encode_store_heap_oop_not_null(p, new_obj);

    86       if (_gc_barrier) {

    87         // Now call parent closure

    88         do_barrier(p);

    89       }

    90     }

    91   }

    92 }

    94 inline void FastScanClosure::do_oop_nv(oop* p)       { FastScanClosure::do_oop_work(p); }

    95 inline void FastScanClosure::do_oop_nv(narrowOop* p) { FastScanClosure::do_oop_work(p); }

    97 // Note similarity to ScanClosure; the difference is that

    98 // the barrier set is taken care of outside this closure.

    99 template <class T> inline void ScanWeakRefClosure::do_oop_work(T* p) {

   100   assert(!oopDesc::is_null(*p), "null weak reference?");

   101   oop obj = oopDesc::load_decode_heap_oop_not_null(p);

   102   // weak references are sometimes scanned twice; must check

   103   // that to-space doesn't already contain this object

   104   if ((HeapWord*)obj < _boundary && !_g->to()->is_in_reserved(obj)) {

   105     oop new_obj = obj->is_forwarded() ? obj->forwardee()

   106                                       : _g->copy_to_survivor_space(obj);

   107     oopDesc::encode_store_heap_oop_not_null(p, new_obj);

   108   }

   109 }

   111 inline void ScanWeakRefClosure::do_oop_nv(oop* p)       { ScanWeakRefClosure::do_oop_work(p); }

   112 inline void ScanWeakRefClosure::do_oop_nv(narrowOop* p) { ScanWeakRefClosure::do_oop_work(p); }

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