jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.hpp@db9981fd3124

8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
Summary: Rename INCLUDE_ALTERNATE_GCS to INCLUDE_ALL_GCS and replace SERIALGC with INCLUDE_ALL_GCS.
Reviewed-by: coleenp, stefank

     1 /*

     2  * Copyright (c) 2001, 2011, 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 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1SATBCARDTABLEMODREFBS_HPP

    26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1SATBCARDTABLEMODREFBS_HPP

    28 #include "memory/cardTableModRefBS.hpp"

    29 #include "memory/memRegion.hpp"

    30 #include "oops/oop.inline.hpp"

    31 #include "utilities/macros.hpp"

    33 #if INCLUDE_ALL_GCS

    35 class DirtyCardQueueSet;

    37 // This barrier is specialized to use a logging barrier to support

    38 // snapshot-at-the-beginning marking.

    40 class G1SATBCardTableModRefBS: public CardTableModRefBSForCTRS {

    41 public:

    42   // Add "pre_val" to a set of objects that may have been disconnected from the

    43   // pre-marking object graph.

    44   static void enqueue(oop pre_val);

    46   G1SATBCardTableModRefBS(MemRegion whole_heap,

    47                           int max_covered_regions);

    49   bool is_a(BarrierSet::Name bsn) {

    50     return bsn == BarrierSet::G1SATBCT || CardTableModRefBS::is_a(bsn);

    51   }

    53   virtual bool has_write_ref_pre_barrier() { return true; }

    55   // This notes that we don't need to access any BarrierSet data

    56   // structures, so this can be called from a static context.

    57   template <class T> static void write_ref_field_pre_static(T* field, oop newVal) {

    58     T heap_oop = oopDesc::load_heap_oop(field);

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

    60       enqueue(oopDesc::decode_heap_oop(heap_oop));

    61     }

    62   }

    64   // We export this to make it available in cases where the static

    65   // type of the barrier set is known.  Note that it is non-virtual.

    66   template <class T> inline void inline_write_ref_field_pre(T* field, oop newVal) {

    67     write_ref_field_pre_static(field, newVal);

    68   }

    70   // These are the more general virtual versions.

    71   virtual void write_ref_field_pre_work(oop* field, oop new_val) {

    72     inline_write_ref_field_pre(field, new_val);

    73   }

    74   virtual void write_ref_field_pre_work(narrowOop* field, oop new_val) {

    75     inline_write_ref_field_pre(field, new_val);

    76   }

    77   virtual void write_ref_field_pre_work(void* field, oop new_val) {

    78     guarantee(false, "Not needed");

    79   }

    81   template <class T> void write_ref_array_pre_work(T* dst, int count);

    82   virtual void write_ref_array_pre(oop* dst, int count, bool dest_uninitialized) {

    83     if (!dest_uninitialized) {

    84       write_ref_array_pre_work(dst, count);

    85     }

    86   }

    87   virtual void write_ref_array_pre(narrowOop* dst, int count, bool dest_uninitialized) {

    88     if (!dest_uninitialized) {

    89       write_ref_array_pre_work(dst, count);

    90     }

    91   }

    92 };

    94 // Adds card-table logging to the post-barrier.

    95 // Usual invariant: all dirty cards are logged in the DirtyCardQueueSet.

    96 class G1SATBCardTableLoggingModRefBS: public G1SATBCardTableModRefBS {

    97  private:

    98   DirtyCardQueueSet& _dcqs;

    99  public:

   100   G1SATBCardTableLoggingModRefBS(MemRegion whole_heap,

   101                                  int max_covered_regions);

   103   bool is_a(BarrierSet::Name bsn) {

   104     return bsn == BarrierSet::G1SATBCTLogging ||

   105       G1SATBCardTableModRefBS::is_a(bsn);

   106   }

   108   void write_ref_field_work(void* field, oop new_val);

   110   // Can be called from static contexts.

   111   static void write_ref_field_static(void* field, oop new_val);

   113   // NB: if you do a whole-heap invalidation, the "usual invariant" defined

   114   // above no longer applies.

   115   void invalidate(MemRegion mr, bool whole_heap = false);

   117   void write_region_work(MemRegion mr)    { invalidate(mr); }

   118   void write_ref_array_work(MemRegion mr) { invalidate(mr); }

   121 };

   124 #endif // INCLUDE_ALL_GCS

   126 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1SATBCARDTABLEMODREFBS_HPP

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

src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.hpp@db9981fd3124

src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.hpp