jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/shared/markSweep.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 2000-2008 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 void MarkSweep::mark_object(oop obj) {

    26 #ifndef SERIALGC

    27   if (UseParallelOldGC && VerifyParallelOldWithMarkSweep) {

    28     assert(PSParallelCompact::mark_bitmap()->is_marked(obj),

    29            "Should be marked in the marking bitmap");

    30   }

    31 #endif // SERIALGC

    33   // some marks may contain information we need to preserve so we store them away

    34   // and overwrite the mark.  We'll restore it at the end of markSweep.

    35   markOop mark = obj->mark();

    36   obj->set_mark(markOopDesc::prototype()->set_marked());

    38   if (mark->must_be_preserved(obj)) {

    39     preserve_mark(obj, mark);

    40   }

    41 }

    43 template <class T> inline void MarkSweep::follow_root(T* p) {

    44   assert(!Universe::heap()->is_in_reserved(p),

    45          "roots shouldn't be things within the heap");

    46 #ifdef VALIDATE_MARK_SWEEP

    47   if (ValidateMarkSweep) {

    48     guarantee(!_root_refs_stack->contains(p), "should only be in here once");

    49     _root_refs_stack->push(p);

    50   }

    51 #endif

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

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

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

    55     if (!obj->mark()->is_marked()) {

    56       mark_object(obj);

    57       obj->follow_contents();

    58     }

    59   }

    60   follow_stack();

    61 }

    63 template <class T> inline void MarkSweep::mark_and_follow(T* p) {

    64 //  assert(Universe::heap()->is_in_reserved(p), "should be in object space");

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

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

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

    68     if (!obj->mark()->is_marked()) {

    69       mark_object(obj);

    70       obj->follow_contents();

    71     }

    72   }

    73 }

    75 template <class T> inline void MarkSweep::mark_and_push(T* p) {

    76 //  assert(Universe::heap()->is_in_reserved(p), "should be in object space");

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

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

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

    80     if (!obj->mark()->is_marked()) {

    81       mark_object(obj);

    82       _marking_stack->push(obj);

    83     }

    84   }

    85 }

    87 template <class T> inline void MarkSweep::adjust_pointer(T* p, bool isroot) {

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

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

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

    91     oop new_obj = oop(obj->mark()->decode_pointer());

    92     assert(new_obj != NULL ||                         // is forwarding ptr?

    93            obj->mark() == markOopDesc::prototype() || // not gc marked?

    94            (UseBiasedLocking && obj->mark()->has_bias_pattern()) ||

    95                                                       // not gc marked?

    96            obj->is_shared(),                          // never forwarded?

    97            "should be forwarded");

    98     if (new_obj != NULL) {

    99       assert(Universe::heap()->is_in_reserved(new_obj),

   100              "should be in object space");

   101       oopDesc::encode_store_heap_oop_not_null(p, new_obj);

   102     }

   103   }

   104   VALIDATE_MARK_SWEEP_ONLY(track_adjusted_pointer(p, isroot));

   105 }

   107 template <class T> inline void MarkSweep::KeepAliveClosure::do_oop_work(T* p) {

   108 #ifdef VALIDATE_MARK_SWEEP

   109   if (ValidateMarkSweep) {

   110     if (!Universe::heap()->is_in_reserved(p)) {

   111       _root_refs_stack->push(p);

   112     } else {

   113       _other_refs_stack->push(p);

   114     }

   115   }

   116 #endif

   117   mark_and_push(p);

   118 }

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