jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.hpp@8a5ea0a9ccc4

7127708: G1: change task num types from int to uint in concurrent mark
Summary: Change the type of various task num fields, parameters etc to unsigned and rename them to be more consistent with the other collectors. Code changes were also reviewed by Vitaly Davidovich.
Reviewed-by: johnc
Contributed-by: Kaushik Srenevasan <kaushik@twitter.com>

     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"

    32 #ifndef SERIALGC

    34 class DirtyCardQueueSet;

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

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

    39 class G1SATBCardTableModRefBS: public CardTableModRefBSForCTRS {

    40 public:

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

    42   // pre-marking object graph.

    43   static void enqueue(oop pre_val);

    45   G1SATBCardTableModRefBS(MemRegion whole_heap,

    46                           int max_covered_regions);

    48   bool is_a(BarrierSet::Name bsn) {

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

    50   }

    52   virtual bool has_write_ref_pre_barrier() { return true; }

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

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

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

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

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

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

    60     }

    61   }

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

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

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

    66     write_ref_field_pre_static(field, newVal);

    67   }

    69   // These are the more general virtual versions.

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

    71     inline_write_ref_field_pre(field, new_val);

    72   }

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

    74     inline_write_ref_field_pre(field, new_val);

    75   }

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

    77     guarantee(false, "Not needed");

    78   }

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

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

    82     if (!dest_uninitialized) {

    83       write_ref_array_pre_work(dst, count);

    84     }

    85   }

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

    87     if (!dest_uninitialized) {

    88       write_ref_array_pre_work(dst, count);

    89     }

    90   }

    91 };

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

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

    95 class G1SATBCardTableLoggingModRefBS: public G1SATBCardTableModRefBS {

    96  private:

    97   DirtyCardQueueSet& _dcqs;

    98  public:

    99   G1SATBCardTableLoggingModRefBS(MemRegion whole_heap,

   100                                  int max_covered_regions);

   102   bool is_a(BarrierSet::Name bsn) {

   103     return bsn == BarrierSet::G1SATBCTLogging ||

   104       G1SATBCardTableModRefBS::is_a(bsn);

   105   }

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

   109   // Can be called from static contexts.

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

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

   113   // above no longer applies.

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

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

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

   120 };

   123 #endif // SERIALGC

   125 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1SATBCARDTABLEMODREFBS_HPP

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

src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.hpp@8a5ea0a9ccc4

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