jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/vm_operations

6890137: G1: revamp reachable object dump
Summary: Revamp the reachable object dump debugging facility.
Reviewed-by: jmasa, apetrusenko

     1 /*

     2  * Copyright 2001-2009 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 // VM_operations for the G1 collector.

    26 // VM_GC_Operation:

    27 //   - VM_CGC_Operation

    28 //   - VM_G1CollectFull

    29 //   - VM_G1CollectForAllocation

    30 //   - VM_G1IncCollectionPause

    31 //   - VM_G1PopRegionCollectionPause

    33 class VM_G1CollectFull: public VM_GC_Operation {

    34  private:

    35  public:

    36   VM_G1CollectFull(int gc_count_before,

    37                    GCCause::Cause gc_cause)

    38     : VM_GC_Operation(gc_count_before)

    39   {

    40     _gc_cause = gc_cause;

    41   }

    42   ~VM_G1CollectFull() {}

    43   virtual VMOp_Type type() const { return VMOp_G1CollectFull; }

    44   virtual void doit();

    45   virtual const char* name() const {

    46     return "full garbage-first collection";

    47   }

    48 };

    50 class VM_G1CollectForAllocation: public VM_GC_Operation {

    51  private:

    52   HeapWord*   _res;

    53   size_t      _size;                       // size of object to be allocated

    54  public:

    55   VM_G1CollectForAllocation(size_t size, int gc_count_before)

    56     : VM_GC_Operation(gc_count_before) {

    57     _size        = size;

    58     _res         = NULL;

    59   }

    60   ~VM_G1CollectForAllocation()        {}

    61   virtual VMOp_Type type() const { return VMOp_G1CollectForAllocation; }

    62   virtual void doit();

    63   virtual const char* name() const {

    64     return "garbage-first collection to satisfy allocation";

    65   }

    66   HeapWord* result() { return _res; }

    67 };

    69 class VM_G1IncCollectionPause: public VM_GC_Operation {

    70  public:

    71   VM_G1IncCollectionPause(int gc_count_before) :

    72     VM_GC_Operation(gc_count_before) {}

    73   virtual VMOp_Type type() const { return VMOp_G1IncCollectionPause; }

    74   virtual void doit();

    75   virtual const char* name() const {

    76     return "garbage-first incremental collection pause";

    77   }

    78 };

    80 // Concurrent GC stop-the-world operations such as initial and final mark;

    81 // consider sharing these with CMS's counterparts.

    82 class VM_CGC_Operation: public VM_Operation {

    83   VoidClosure* _cl;

    84   const char* _printGCMessage;

    85  public:

    86   VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg) :

    87     _cl(cl),

    88     _printGCMessage(printGCMsg)

    89     {}

    91   ~VM_CGC_Operation() {}

    93   virtual VMOp_Type type() const { return VMOp_CGC_Operation; }

    94   virtual void doit();

    95   virtual bool doit_prologue();

    96   virtual void doit_epilogue();

    97   virtual const char* name() const {

    98     return "concurrent gc";

    99   }

   100 };

src/share/vm/gc_implementation/g1/vm_operations_g1.hpp@6270f80a7331