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

     1 /*

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     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

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    25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP

    26 #define SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP

    28 #include "gc_implementation/g1/g1AllocationContext.hpp"

    29 #include "gc_implementation/shared/vmGCOperations.hpp"

    31 // VM_operations for the G1 collector.

    32 // VM_GC_Operation:

    33 //   - VM_CGC_Operation

    34 //   - VM_G1CollectFull

    35 //   - VM_G1OperationWithAllocRequest

    36 //     - VM_G1CollectForAllocation

    37 //     - VM_G1IncCollectionPause

    39 class VM_G1OperationWithAllocRequest: public VM_GC_Operation {

    40 protected:

    41   size_t    _word_size;

    42   HeapWord* _result;

    43   bool      _pause_succeeded;

    44   AllocationContext_t _allocation_context;

    46 public:

    47   VM_G1OperationWithAllocRequest(unsigned int gc_count_before,

    48                                  size_t       word_size,

    49                                  GCCause::Cause gc_cause)

    50     : VM_GC_Operation(gc_count_before, gc_cause),

    51       _word_size(word_size), _result(NULL), _pause_succeeded(false) { }

    52   HeapWord* result() { return _result; }

    53   bool pause_succeeded() { return _pause_succeeded; }

    54   void set_allocation_context(AllocationContext_t context) { _allocation_context = context; }

    55   AllocationContext_t  allocation_context() { return _allocation_context; }

    56 };

    58 class VM_G1CollectFull: public VM_GC_Operation {

    59 public:

    60   VM_G1CollectFull(unsigned int gc_count_before,

    61                    unsigned int full_gc_count_before,

    62                    GCCause::Cause cause)

    63     : VM_GC_Operation(gc_count_before, cause, full_gc_count_before) { }

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

    65   virtual void doit();

    66   virtual const char* name() const {

    67     return "full garbage-first collection";

    68   }

    69 };

    71 class VM_G1CollectForAllocation: public VM_G1OperationWithAllocRequest {

    72 public:

    73   VM_G1CollectForAllocation(unsigned int gc_count_before,

    74                             size_t       word_size);

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

    76   virtual void doit();

    77   virtual const char* name() const {

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

    79   }

    80 };

    82 class VM_G1IncCollectionPause: public VM_G1OperationWithAllocRequest {

    83 private:

    84   bool         _should_initiate_conc_mark;

    85   bool         _should_retry_gc;

    86   double       _target_pause_time_ms;

    87   unsigned int _old_marking_cycles_completed_before;

    88 public:

    89   VM_G1IncCollectionPause(unsigned int   gc_count_before,

    90                           size_t         word_size,

    91                           bool           should_initiate_conc_mark,

    92                           double         target_pause_time_ms,

    93                           GCCause::Cause gc_cause);

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

    95   virtual bool doit_prologue();

    96   virtual void doit();

    97   virtual void doit_epilogue();

    98   virtual const char* name() const {

    99     return "garbage-first incremental collection pause";

   100   }

   101   bool should_retry_gc() const { return _should_retry_gc; }

   102 };

   104 // Concurrent GC stop-the-world operations such as remark and cleanup;

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

   106 class VM_CGC_Operation: public VM_Operation {

   107   VoidClosure* _cl;

   108   const char* _printGCMessage;

   109   bool _needs_pll;

   111 protected:

   112   // java.lang.ref.Reference support

   113   void acquire_pending_list_lock();

   114   void release_and_notify_pending_list_lock();

   116 public:

   117   VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg, bool needs_pll)

   118     : _cl(cl), _printGCMessage(printGCMsg), _needs_pll(needs_pll) { }

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

   120   virtual void doit();

   121   virtual bool doit_prologue();

   122   virtual void doit_epilogue();

   123   virtual const char* name() const {

   124     return "concurrent gc";

   125   }

   126 };

   128 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP

src/share/vm/gc_implementation/g1/vm_operations_g1.hpp@c2844108a708