Thu, 07 Aug 2014 22:28:53 +0200
8054341: Remove some obsolete code in G1CollectedHeap class
Summary: Remove dead code.
Reviewed-by: stefank, brutisso
1 /*
2 * Copyright (c) 2001, 2012, 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_VM_OPERATIONS_G1_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP
28 #include "gc_implementation/shared/vmGCOperations.hpp"
30 // VM_operations for the G1 collector.
31 // VM_GC_Operation:
32 // - VM_CGC_Operation
33 // - VM_G1CollectFull
34 // - VM_G1OperationWithAllocRequest
35 // - VM_G1CollectForAllocation
36 // - VM_G1IncCollectionPause
38 class VM_G1OperationWithAllocRequest: public VM_GC_Operation {
39 protected:
40 size_t _word_size;
41 HeapWord* _result;
42 bool _pause_succeeded;
44 public:
45 VM_G1OperationWithAllocRequest(unsigned int gc_count_before,
46 size_t word_size,
47 GCCause::Cause gc_cause)
48 : VM_GC_Operation(gc_count_before, gc_cause),
49 _word_size(word_size), _result(NULL), _pause_succeeded(false) { }
50 HeapWord* result() { return _result; }
51 bool pause_succeeded() { return _pause_succeeded; }
52 };
54 class VM_G1CollectFull: public VM_GC_Operation {
55 public:
56 VM_G1CollectFull(unsigned int gc_count_before,
57 unsigned int full_gc_count_before,
58 GCCause::Cause cause)
59 : VM_GC_Operation(gc_count_before, cause, full_gc_count_before) { }
60 virtual VMOp_Type type() const { return VMOp_G1CollectFull; }
61 virtual void doit();
62 virtual const char* name() const {
63 return "full garbage-first collection";
64 }
65 };
67 class VM_G1CollectForAllocation: public VM_G1OperationWithAllocRequest {
68 public:
69 VM_G1CollectForAllocation(unsigned int gc_count_before,
70 size_t word_size);
71 virtual VMOp_Type type() const { return VMOp_G1CollectForAllocation; }
72 virtual void doit();
73 virtual const char* name() const {
74 return "garbage-first collection to satisfy allocation";
75 }
76 };
78 class VM_G1IncCollectionPause: public VM_G1OperationWithAllocRequest {
79 private:
80 bool _should_initiate_conc_mark;
81 bool _should_retry_gc;
82 double _target_pause_time_ms;
83 unsigned int _old_marking_cycles_completed_before;
84 public:
85 VM_G1IncCollectionPause(unsigned int gc_count_before,
86 size_t word_size,
87 bool should_initiate_conc_mark,
88 double target_pause_time_ms,
89 GCCause::Cause gc_cause);
90 virtual VMOp_Type type() const { return VMOp_G1IncCollectionPause; }
91 virtual bool doit_prologue();
92 virtual void doit();
93 virtual void doit_epilogue();
94 virtual const char* name() const {
95 return "garbage-first incremental collection pause";
96 }
97 bool should_retry_gc() const { return _should_retry_gc; }
98 };
100 // Concurrent GC stop-the-world operations such as remark and cleanup;
101 // consider sharing these with CMS's counterparts.
102 class VM_CGC_Operation: public VM_Operation {
103 VoidClosure* _cl;
104 const char* _printGCMessage;
105 bool _needs_pll;
107 protected:
108 // java.lang.ref.Reference support
109 void acquire_pending_list_lock();
110 void release_and_notify_pending_list_lock();
112 public:
113 VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg, bool needs_pll)
114 : _cl(cl), _printGCMessage(printGCMsg), _needs_pll(needs_pll) { }
115 virtual VMOp_Type type() const { return VMOp_CGC_Operation; }
116 virtual void doit();
117 virtual bool doit_prologue();
118 virtual void doit_epilogue();
119 virtual const char* name() const {
120 return "concurrent gc";
121 }
122 };
124 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP