jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1HRPrinter.hpp@595c0f60d50d

8029075: String deduplication in G1
Summary: Implementation of JEP 192, http://openjdk.java.net/jeps/192
Reviewed-by: brutisso, tschatzl, coleenp

     1 /*

     2  * Copyright (c) 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_G1HRPRINTER_HPP

    26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1HRPRINTER_HPP

    28 #include "memory/allocation.hpp"

    29 #include "gc_implementation/g1/heapRegion.hpp"

    31 #define SKIP_RETIRED_FULL_REGIONS 1

    33 class G1HRPrinter VALUE_OBJ_CLASS_SPEC {

    34 public:

    35   typedef enum {

    36     Alloc,

    37     AllocForce,

    38     Retire,

    39     Reuse,

    40     CSet,

    41     EvacFailure,

    42     Cleanup,

    43     PostCompaction,

    44     Commit,

    45     Uncommit

    46   } ActionType;

    48   typedef enum {

    49     Unset,

    50     Eden,

    51     Survivor,

    52     Old,

    53     SingleHumongous,

    54     StartsHumongous,

    55     ContinuesHumongous

    56   } RegionType;

    58   typedef enum {

    59     StartGC,

    60     EndGC,

    61     StartFullGC,

    62     EndFullGC

    63   } PhaseType;

    65 private:

    66   bool _active;

    68   static const char* action_name(ActionType action);

    69   static const char* region_type_name(RegionType type);

    70   static const char* phase_name(PhaseType phase);

    72   // Print an action event. This version is used in most scenarios and

    73   // only prints the region's bottom. The parameters type and top are

    74   // optional (the "not set" values are Unset and NULL).

    75   static void print(ActionType action, RegionType type,

    76                     HeapRegion* hr, HeapWord* top);

    78   // Print an action event. This version prints both the region's

    79   // bottom and end. Used for Commit / Uncommit events.

    80   static void print(ActionType action, HeapWord* bottom, HeapWord* end);

    82   // Print a phase event.

    83   static void print(PhaseType phase, size_t phase_num);

    85 public:

    86   // In some places we iterate over a list in order to generate output

    87   // for the list's elements. By exposing this we can avoid this

    88   // iteration if the printer is not active.

    89   const bool is_active() { return _active; }

    91   // Have to set this explicitly as we have to do this during the

    92   // heap's initialize() method, not in the constructor.

    93   void set_active(bool active) { _active = active; }

    95   // The methods below are convenient wrappers for the print() methods.

    97   void alloc(HeapRegion* hr, RegionType type, bool force = false) {

    98     if (is_active()) {

    99       print((!force) ? Alloc : AllocForce, type, hr, NULL);

   100     }

   101   }

   103   void alloc(RegionType type, HeapRegion* hr, HeapWord* top) {

   104     if (is_active()) {

   105       print(Alloc, type, hr, top);

   106     }

   107   }

   109   void retire(HeapRegion* hr) {

   110     if (is_active()) {

   111       if (!SKIP_RETIRED_FULL_REGIONS || hr->top() < hr->end()) {

   112         print(Retire, Unset, hr, hr->top());

   113       }

   114     }

   115   }

   117   void reuse(HeapRegion* hr) {

   118     if (is_active()) {

   119       print(Reuse, Unset, hr, NULL);

   120     }

   121   }

   123   void cset(HeapRegion* hr) {

   124     if (is_active()) {

   125       print(CSet, Unset, hr, NULL);

   126     }

   127   }

   129   void evac_failure(HeapRegion* hr) {

   130     if (is_active()) {

   131       print(EvacFailure, Unset, hr, NULL);

   132     }

   133   }

   135   void cleanup(HeapRegion* hr) {

   136     if (is_active()) {

   137       print(Cleanup, Unset, hr, NULL);

   138     }

   139   }

   141   void post_compaction(HeapRegion* hr, RegionType type) {

   142     if (is_active()) {

   143       print(PostCompaction, type, hr, hr->top());

   144     }

   145   }

   147   void commit(HeapWord* bottom, HeapWord* end) {

   148     if (is_active()) {

   149       print(Commit, bottom, end);

   150     }

   151   }

   153   void uncommit(HeapWord* bottom, HeapWord* end) {

   154     if (is_active()) {

   155       print(Uncommit, bottom, end);

   156     }

   157   }

   159   void start_gc(bool full, size_t gc_num) {

   160     if (is_active()) {

   161       if (!full) {

   162         print(StartGC, gc_num);

   163       } else {

   164         print(StartFullGC, gc_num);

   165       }

   166     }

   167   }

   169   void end_gc(bool full, size_t gc_num) {

   170     if (is_active()) {

   171       if (!full) {

   172         print(EndGC, gc_num);

   173       } else {

   174         print(EndFullGC, gc_num);

   175       }

   176     }

   177   }

   179   G1HRPrinter() : _active(false) { }

   180 };

   182 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1HRPRINTER_HPP

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