jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1OopClosures.inline.hpp@5f429ee79634

     1 /*

     2  * Copyright (c) 2001, 2010, 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  */

    25 /*

    26  * This really ought to be an inline function, but apparently the C++

    27  * compiler sometimes sees fit to ignore inline declarations.  Sigh.

    28  */

    30 // This must a ifdef'ed because the counting it controls is in a

    31 // perf-critical inner loop.

    32 #define FILTERINTOCSCLOSURE_DOHISTOGRAMCOUNT 0

    34 template <class T> inline void FilterIntoCSClosure::do_oop_nv(T* p) {

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

    36   if (!oopDesc::is_null(heap_oop) &&

    37       _g1->obj_in_cs(oopDesc::decode_heap_oop_not_null(heap_oop))) {

    38     _oc->do_oop(p);

    39 #if FILTERINTOCSCLOSURE_DOHISTOGRAMCOUNT

    40     if (_dcto_cl != NULL)

    41       _dcto_cl->incr_count();

    42 #endif

    43   }

    44 }

    46 #define FILTEROUTOFREGIONCLOSURE_DOHISTOGRAMCOUNT 0

    48 template <class T> inline void FilterOutOfRegionClosure::do_oop_nv(T* p) {

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

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

    51     HeapWord* obj_hw = (HeapWord*)oopDesc::decode_heap_oop_not_null(heap_oop);

    52     if (obj_hw < _r_bottom || obj_hw >= _r_end) {

    53       _oc->do_oop(p);

    54 #if FILTEROUTOFREGIONCLOSURE_DOHISTOGRAMCOUNT

    55       _out_of_region++;

    56 #endif

    57     }

    58   }

    59 }

    61 template <class T> inline void FilterInHeapRegionAndIntoCSClosure::do_oop_nv(T* p) {

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

    63   if (!oopDesc::is_null(heap_oop) &&

    64       _g1->obj_in_cs(oopDesc::decode_heap_oop_not_null(heap_oop)))

    65     _oc->do_oop(p);

    66 }

    68 template <class T> inline void FilterAndMarkInHeapRegionAndIntoCSClosure::do_oop_nv(T* p) {

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

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

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

    72     HeapRegion* hr = _g1->heap_region_containing((HeapWord*) obj);

    73     if (hr != NULL) {

    74       if (hr->in_collection_set())

    75         _oc->do_oop(p);

    76       else if (!hr->is_young())

    77         _cm->grayRoot(obj);

    78     }

    79   }

    80 }

    82 // This closure is applied to the fields of the objects that have just been copied.

    83 template <class T> inline void G1ParScanClosure::do_oop_nv(T* p) {

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

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

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

    88     if (_g1->in_cset_fast_test(obj)) {

    89       // We're not going to even bother checking whether the object is

    90       // already forwarded or not, as this usually causes an immediate

    91       // stall. We'll try to prefetch the object (for write, given that

    92       // we might need to install the forwarding reference) and we'll

    93       // get back to it when pop it from the queue

    94       Prefetch::write(obj->mark_addr(), 0);

    95       Prefetch::read(obj->mark_addr(), (HeapWordSize*2));

    97       // slightly paranoid test; I'm trying to catch potential

    98       // problems before we go into push_on_queue to know where the

    99       // problem is coming from

   100       assert(obj == oopDesc::load_decode_heap_oop(p),

   101              "p should still be pointing to obj");

   102       _par_scan_state->push_on_queue(p);

   103     } else {

   104       _par_scan_state->update_rs(_from, p, _par_scan_state->queue_num());

   105     }

   106   }

   107 }

   109 template <class T> inline void G1ParPushHeapRSClosure::do_oop_nv(T* p) {

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

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

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

   114     if (_g1->in_cset_fast_test(obj)) {

   115       Prefetch::write(obj->mark_addr(), 0);

   116       Prefetch::read(obj->mark_addr(), (HeapWordSize*2));

   118       // Place on the references queue

   119       _par_scan_state->push_on_queue(p);

   120     }

   121   }

   122 }

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