jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp@c32059ef4dc0

6971296: G1: simplify G1RemSet class hierarchy
Summary: Remove G1RemSet base class and StupidG1RemSet class; rename HRInto_G1RemSet to just G1RemSet.
Reviewed-by: ysr, tonyp

     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 inline size_t G1RemSet::n_workers() {

    26   if (_g1->workers() != NULL) {

    27     return _g1->workers()->total_workers();

    28   } else {

    29     return 1;

    30   }

    31 }

    33 template <class T>

    34 inline void G1RemSet::write_ref_nv(HeapRegion* from, T* p) {

    35   par_write_ref_nv(from, p, 0);

    36 }

    38 inline bool G1RemSet::self_forwarded(oop obj) {

    39   bool result =  (obj->is_forwarded() && (obj->forwardee()== obj));

    40   return result;

    41 }

    43 template <class T>

    44 inline void G1RemSet::par_write_ref_nv(HeapRegion* from, T* p, int tid) {

    45   oop obj = oopDesc::load_decode_heap_oop(p);

    46 #ifdef ASSERT

    47   // can't do because of races

    48   // assert(obj == NULL || obj->is_oop(), "expected an oop");

    50   // Do the safe subset of is_oop

    51   if (obj != NULL) {

    52 #ifdef CHECK_UNHANDLED_OOPS

    53     oopDesc* o = obj.obj();

    54 #else

    55     oopDesc* o = obj;

    56 #endif // CHECK_UNHANDLED_OOPS

    57     assert((intptr_t)o % MinObjAlignmentInBytes == 0, "not oop aligned");

    58     assert(Universe::heap()->is_in_reserved(obj), "must be in heap");

    59   }

    60 #endif // ASSERT

    62   assert(from == NULL || from->is_in_reserved(p), "p is not in from");

    64   HeapRegion* to = _g1->heap_region_containing(obj);

    65   // The test below could be optimized by applying a bit op to to and from.

    66   if (to != NULL && from != NULL && from != to) {

    67     // The _traversal_in_progress flag is true during the collection pause,

    68     // false during the evacuation failure handling. This should avoid a

    69     // potential loop if we were to add the card containing 'p' to the DCQS

    70     // that's used to regenerate the remembered sets for the collection set,

    71     // in the event of an evacuation failure, here. The UpdateRSImmediate

    72     // closure will eventally call this routine.

    73     if (_traversal_in_progress &&

    74         to->in_collection_set() && !self_forwarded(obj)) {

    76       assert(_cset_rs_update_cl[tid] != NULL, "should have been set already");

    77       _cset_rs_update_cl[tid]->do_oop(p);

    79       // Deferred updates to the CSet are either discarded (in the normal case),

    80       // or processed (if an evacuation failure occurs) at the end

    81       // of the collection.

    82       // See G1RemSet::cleanup_after_oops_into_collection_set_do().

    83     } else {

    84 #if G1_REM_SET_LOGGING

    85       gclog_or_tty->print_cr("Adding " PTR_FORMAT " (" PTR_FORMAT ") to RS"

    86                              " for region [" PTR_FORMAT ", " PTR_FORMAT ")",

    87                              p, obj,

    88                              to->bottom(), to->end());

    89 #endif

    90       assert(to->rem_set() != NULL, "Need per-region 'into' remsets.");

    91       to->rem_set()->add_reference(p, tid);

    92     }

    93   }

    94 }

    96 template <class T>

    97 inline void UpdateRSOopClosure::do_oop_work(T* p) {

    98   assert(_from != NULL, "from region must be non-NULL");

    99   _rs->par_write_ref(_from, p, _worker_i);

   100 }

   102 template <class T>

   103 inline void UpdateRSetImmediate::do_oop_work(T* p) {

   104   assert(_from->is_in_reserved(p), "paranoia");

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

   106   if (!oopDesc::is_null(heap_oop) && !_from->is_survivor()) {

   107     _g1_rem_set->par_write_ref(_from, p, 0);

   108   }

   109 }

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp@c32059ef4dc0

src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp