hotspot/src/share/vm/gc_implementation/concurrentMarkSweep/vmCMSOperations.hpp
author trims
Thu, 27 May 2010 19:08:38 -0700
changeset 5547 f4b087cbb361
parent 5433 c182d4c3039e
child 7397 5b173b4ca846
permissions -rw-r--r--
6941466: Oracle rebranding changes for Hotspot repositories Summary: Change all the Sun copyrights to Oracle copyright Reviewed-by: ohair
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
     1
/*
5547
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 5433
diff changeset
     2
 * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
     3
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
489c9b5090e2 Initial load
duke
parents:
diff changeset
     4
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
     5
 * This code is free software; you can redistribute it and/or modify it
489c9b5090e2 Initial load
duke
parents:
diff changeset
     6
 * under the terms of the GNU General Public License version 2 only, as
489c9b5090e2 Initial load
duke
parents:
diff changeset
     7
 * published by the Free Software Foundation.
489c9b5090e2 Initial load
duke
parents:
diff changeset
     8
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
     9
 * This code is distributed in the hope that it will be useful, but WITHOUT
489c9b5090e2 Initial load
duke
parents:
diff changeset
    10
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
489c9b5090e2 Initial load
duke
parents:
diff changeset
    11
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
489c9b5090e2 Initial load
duke
parents:
diff changeset
    12
 * version 2 for more details (a copy is included in the LICENSE file that
489c9b5090e2 Initial load
duke
parents:
diff changeset
    13
 * accompanied this code).
489c9b5090e2 Initial load
duke
parents:
diff changeset
    14
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
    15
 * You should have received a copy of the GNU General Public License version
489c9b5090e2 Initial load
duke
parents:
diff changeset
    16
 * 2 along with this work; if not, write to the Free Software Foundation,
489c9b5090e2 Initial load
duke
parents:
diff changeset
    17
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    18
 *
5547
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 5433
diff changeset
    19
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 5433
diff changeset
    20
 * or visit www.oracle.com if you need additional information or have any
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 5433
diff changeset
    21
 * questions.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    22
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
    23
 */
489c9b5090e2 Initial load
duke
parents:
diff changeset
    24
489c9b5090e2 Initial load
duke
parents:
diff changeset
    25
// The VM_CMS_Operation is slightly different from
489c9b5090e2 Initial load
duke
parents:
diff changeset
    26
// a VM_GC_Operation -- and would not have subclassed easily
489c9b5090e2 Initial load
duke
parents:
diff changeset
    27
// to VM_GC_Operation without several changes to VM_GC_Operation.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    28
// To minimize the changes, we have replicated some of the VM_GC_Operation
489c9b5090e2 Initial load
duke
parents:
diff changeset
    29
// functionality here. We will consolidate that back by doing subclassing
489c9b5090e2 Initial load
duke
parents:
diff changeset
    30
// as appropriate in Dolphin.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    31
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
    32
//  VM_Operation
489c9b5090e2 Initial load
duke
parents:
diff changeset
    33
//    VM_CMS_Operation
489c9b5090e2 Initial load
duke
parents:
diff changeset
    34
//    - implements the common portion of work done in support
489c9b5090e2 Initial load
duke
parents:
diff changeset
    35
//      of CMS' stop-world phases (initial mark and remark).
489c9b5090e2 Initial load
duke
parents:
diff changeset
    36
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
    37
//      VM_CMS_Initial_Mark
489c9b5090e2 Initial load
duke
parents:
diff changeset
    38
//      VM_CMS_Final_Mark
489c9b5090e2 Initial load
duke
parents:
diff changeset
    39
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
    40
489c9b5090e2 Initial load
duke
parents:
diff changeset
    41
// Forward decl.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    42
class CMSCollector;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    43
489c9b5090e2 Initial load
duke
parents:
diff changeset
    44
class VM_CMS_Operation: public VM_Operation {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    45
 protected:
489c9b5090e2 Initial load
duke
parents:
diff changeset
    46
  CMSCollector*  _collector;                 // associated collector
489c9b5090e2 Initial load
duke
parents:
diff changeset
    47
  bool           _prologue_succeeded;     // whether doit_prologue succeeded
489c9b5090e2 Initial load
duke
parents:
diff changeset
    48
489c9b5090e2 Initial load
duke
parents:
diff changeset
    49
  bool lost_race() const;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    50
489c9b5090e2 Initial load
duke
parents:
diff changeset
    51
  // java.lang.ref.Reference support
489c9b5090e2 Initial load
duke
parents:
diff changeset
    52
  void acquire_pending_list_lock();
489c9b5090e2 Initial load
duke
parents:
diff changeset
    53
  void release_and_notify_pending_list_lock();
489c9b5090e2 Initial load
duke
parents:
diff changeset
    54
489c9b5090e2 Initial load
duke
parents:
diff changeset
    55
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
    56
  VM_CMS_Operation(CMSCollector* collector):
489c9b5090e2 Initial load
duke
parents:
diff changeset
    57
    _collector(collector),
489c9b5090e2 Initial load
duke
parents:
diff changeset
    58
    _prologue_succeeded(false) {}
489c9b5090e2 Initial load
duke
parents:
diff changeset
    59
  ~VM_CMS_Operation() {}
489c9b5090e2 Initial load
duke
parents:
diff changeset
    60
489c9b5090e2 Initial load
duke
parents:
diff changeset
    61
  // The legal collector state for executing this CMS op.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    62
  virtual const CMSCollector::CollectorState legal_state() const = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    63
489c9b5090e2 Initial load
duke
parents:
diff changeset
    64
  // Whether the pending list lock needs to be held
489c9b5090e2 Initial load
duke
parents:
diff changeset
    65
  virtual const bool needs_pll() const = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    66
489c9b5090e2 Initial load
duke
parents:
diff changeset
    67
  // Execute operations in the context of the caller,
489c9b5090e2 Initial load
duke
parents:
diff changeset
    68
  // prior to execution of the vm operation itself.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    69
  virtual bool doit_prologue();
489c9b5090e2 Initial load
duke
parents:
diff changeset
    70
  // Execute operations in the context of the caller,
489c9b5090e2 Initial load
duke
parents:
diff changeset
    71
  // following completion of the vm operation.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    72
  virtual void doit_epilogue();
489c9b5090e2 Initial load
duke
parents:
diff changeset
    73
489c9b5090e2 Initial load
duke
parents:
diff changeset
    74
  virtual bool evaluate_at_safepoint() const { return true; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
    75
  virtual bool is_cheap_allocated() const { return false; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
    76
  virtual bool allow_nested_vm_operations() const  { return false; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
    77
  bool prologue_succeeded() const { return _prologue_succeeded; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
    78
489c9b5090e2 Initial load
duke
parents:
diff changeset
    79
  void verify_before_gc();
489c9b5090e2 Initial load
duke
parents:
diff changeset
    80
  void verify_after_gc();
489c9b5090e2 Initial load
duke
parents:
diff changeset
    81
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
    82
489c9b5090e2 Initial load
duke
parents:
diff changeset
    83
489c9b5090e2 Initial load
duke
parents:
diff changeset
    84
// VM_CMS_Operation for the initial marking phase of CMS.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    85
class VM_CMS_Initial_Mark: public VM_CMS_Operation {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    86
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
    87
  VM_CMS_Initial_Mark(CMSCollector* _collector) :
489c9b5090e2 Initial load
duke
parents:
diff changeset
    88
    VM_CMS_Operation(_collector) {}
489c9b5090e2 Initial load
duke
parents:
diff changeset
    89
489c9b5090e2 Initial load
duke
parents:
diff changeset
    90
  virtual VMOp_Type type() const { return VMOp_CMS_Initial_Mark; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
    91
  virtual void doit();
489c9b5090e2 Initial load
duke
parents:
diff changeset
    92
489c9b5090e2 Initial load
duke
parents:
diff changeset
    93
  virtual const CMSCollector::CollectorState legal_state() const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    94
    return CMSCollector::InitialMarking;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    95
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
    96
489c9b5090e2 Initial load
duke
parents:
diff changeset
    97
  virtual const bool needs_pll() const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    98
    return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    99
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   100
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
   101
489c9b5090e2 Initial load
duke
parents:
diff changeset
   102
// VM_CMS_Operation for the final remark phase of CMS.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   103
class VM_CMS_Final_Remark: public VM_CMS_Operation {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   104
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   105
  VM_CMS_Final_Remark(CMSCollector* _collector) :
489c9b5090e2 Initial load
duke
parents:
diff changeset
   106
    VM_CMS_Operation(_collector) {}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   107
  virtual VMOp_Type type() const { return VMOp_CMS_Final_Remark; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   108
  virtual void doit();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   109
489c9b5090e2 Initial load
duke
parents:
diff changeset
   110
  virtual const CMSCollector::CollectorState legal_state() const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   111
    return CMSCollector::FinalMarking;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   112
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   113
489c9b5090e2 Initial load
duke
parents:
diff changeset
   114
  virtual const bool needs_pll() const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   115
    return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   116
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   117
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
   118
489c9b5090e2 Initial load
duke
parents:
diff changeset
   119
489c9b5090e2 Initial load
duke
parents:
diff changeset
   120
// VM operation to invoke a concurrent collection of the heap as a
489c9b5090e2 Initial load
duke
parents:
diff changeset
   121
// GenCollectedHeap heap.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   122
class VM_GenCollectFullConcurrent: public VM_GC_Operation {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   123
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   124
  VM_GenCollectFullConcurrent(unsigned int gc_count_before,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   125
                              unsigned int full_gc_count_before,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   126
                              GCCause::Cause gc_cause)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   127
    : VM_GC_Operation(gc_count_before, full_gc_count_before, true /* full */) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   128
    _gc_cause = gc_cause;
5433
c182d4c3039e 6919638: CMS: ExplicitGCInvokesConcurrent misinteracts with gc locker
ysr
parents: 1
diff changeset
   129
    assert(FullGCCount_lock != NULL, "Error");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   130
    assert(UseAsyncConcMarkSweepGC, "Else will hang caller");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   131
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   132
  ~VM_GenCollectFullConcurrent() {}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   133
  virtual VMOp_Type type() const { return VMOp_GenCollectFullConcurrent; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   134
  virtual void doit();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   135
  virtual void doit_epilogue();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   136
  virtual bool is_cheap_allocated() const { return false; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   137
  virtual bool evaluate_at_safepoint() const;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   138
};