jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp@37f87013dfd8

6711316: Open source the Garbage-First garbage collector
Summary: First mercurial integration of the code for the Garbage-First garbage collector.
Reviewed-by: apetrusenko, iveresov, jmasa, sgoldman, tonyp, ysr

     1 /*

     2  * Copyright 2001-2007 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 size_t G1RemSet::n_workers() {

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

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

    28   } else {

    29     return 1;

    30   }

    31 }

    33 inline void HRInto_G1RemSet::write_ref_nv(HeapRegion* from, oop* p) {

    34   oop obj = *p;

    35   assert(from != NULL && from->is_in_reserved(p),

    36          "p is not in a from");

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

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

    39     if (!to->popular() && !from->is_survivor()) {

    40 #if G1_REM_SET_LOGGING

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

    42                              " for region [" PTR_FORMAT ", " PTR_FORMAT ")",

    43                              p, obj,

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

    45 #endif

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

    47       if (to->rem_set()->add_reference(p)) {

    48         _g1->schedule_popular_region_evac(to);

    49       }

    50     }

    51   }

    52 }

    54 inline void HRInto_G1RemSet::write_ref(HeapRegion* from, oop* p) {

    55   write_ref_nv(from, p);

    56 }

    58 inline bool HRInto_G1RemSet::self_forwarded(oop obj) {

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

    60   return result;

    61 }

    63 inline void HRInto_G1RemSet::par_write_ref(HeapRegion* from, oop* p, int tid) {

    64   oop obj = *p;

    65 #ifdef ASSERT

    66   // can't do because of races

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

    69   // Do the safe subset of is_oop

    70   if (obj != NULL) {

    71 #ifdef CHECK_UNHANDLED_OOPS

    72     oopDesc* o = obj.obj();

    73 #else

    74     oopDesc* o = obj;

    75 #endif // CHECK_UNHANDLED_OOPS

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

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

    78   }

    79 #endif // ASSERT

    80   assert(from == NULL || from->is_in_reserved(p),

    81          "p is not in from");

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

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

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

    85     if (!to->popular() && !from->is_survivor()) {

    86 #if G1_REM_SET_LOGGING

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

    88                              " for region [" PTR_FORMAT ", " PTR_FORMAT ")",

    89                              p, obj,

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

    91 #endif

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

    93       if (to->rem_set()->add_reference(p, tid)) {

    94         _g1->schedule_popular_region_evac(to);

    95       }

    96     }

    97     // There is a tricky infinite loop if we keep pushing

    98     // self forwarding pointers onto our _new_refs list.

    99     if (_par_traversal_in_progress &&

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

   101       _new_refs[tid]->push(p);

   102     }

   103   }

   104 }

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

src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp@37f87013dfd8

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