1 /*
2 * Copyright (c) 2001, 2016, 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 */
24
25 #ifndef SHARE_VM_GC_G1_VM_OPERATIONS_G1_HPP
26 #define SHARE_VM_GC_G1_VM_OPERATIONS_G1_HPP
27
28 #include "gc/g1/g1AllocationContext.hpp"
29 #include "gc/shared/gcId.hpp"
30 #include "gc/shared/referencePendingListLocker.hpp"
31 #include "gc/shared/vmGCOperations.hpp"
32
33 // VM_operations for the G1 collector.
34 // VM_GC_Operation:
35 // - VM_CGC_Operation
36 // - VM_G1CollectFull
37 // - VM_G1OperationWithAllocRequest
38 // - VM_G1CollectForAllocation
39 // - VM_G1IncCollectionPause
40
41 class VM_G1OperationWithAllocRequest : public VM_CollectForAllocation {
42 protected:
43 bool _pause_succeeded;
44 AllocationContext_t _allocation_context;
45
46 public:
47 VM_G1OperationWithAllocRequest(uint gc_count_before,
48 size_t word_size,
49 GCCause::Cause gc_cause)
50 : VM_CollectForAllocation(word_size, gc_count_before, gc_cause),
51 _pause_succeeded(false) {}
52 bool pause_succeeded() { return _pause_succeeded; }
53 void set_allocation_context(AllocationContext_t context) { _allocation_context = context; }
54 AllocationContext_t allocation_context() { return _allocation_context; }
55 };
56
57 class VM_G1CollectFull: public VM_GC_Operation {
58 public:
59 VM_G1CollectFull(uint gc_count_before,
60 uint full_gc_count_before,
61 GCCause::Cause cause)
62 : VM_GC_Operation(gc_count_before, cause, full_gc_count_before, true) { }
63 virtual VMOp_Type type() const { return VMOp_G1CollectFull; }
64 virtual void doit();
65 virtual const char* name() const {
66 return "full garbage-first collection";
67 }
68 };
69
70 class VM_G1CollectForAllocation: public VM_G1OperationWithAllocRequest {
71 public:
72 VM_G1CollectForAllocation(uint gc_count_before,
73 size_t word_size);
74 virtual VMOp_Type type() const { return VMOp_G1CollectForAllocation; }
75 virtual void doit();
76 virtual const char* name() const {
77 return "garbage-first collection to satisfy allocation";
78 }
79 };
80
81 class VM_G1IncCollectionPause: public VM_G1OperationWithAllocRequest {
82 private:
83 bool _should_initiate_conc_mark;
84 bool _should_retry_gc;
85 double _target_pause_time_ms;
86 uint _old_marking_cycles_completed_before;
87 public:
88 VM_G1IncCollectionPause(uint gc_count_before,
89 size_t word_size,
90 bool should_initiate_conc_mark,
91 double target_pause_time_ms,
92 GCCause::Cause gc_cause);
93 virtual VMOp_Type type() const { return VMOp_G1IncCollectionPause; }
94 virtual bool doit_prologue();
95 virtual void doit();
96 virtual void doit_epilogue();
97 virtual const char* name() const {
98 return "garbage-first incremental collection pause";
99 }
100 bool should_retry_gc() const { return _should_retry_gc; }
101 };
102
103 // Concurrent GC stop-the-world operations such as remark and cleanup;
104 // consider sharing these with CMS's counterparts.
105 class VM_CGC_Operation: public VM_Operation {
106 VoidClosure* _cl;
107 const char* _printGCMessage;
108 bool _needs_pending_list_lock;
109 ReferencePendingListLocker _pending_list_locker;
110 uint _gc_id;
111
112 protected:
113 // java.lang.ref.Reference support
114 void acquire_pending_list_lock();
115 void release_and_notify_pending_list_lock();
116
117 public:
118 VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg, bool needs_pending_list_lock)
119 : _cl(cl), _printGCMessage(printGCMsg), _needs_pending_list_lock(needs_pending_list_lock), _gc_id(GCId::current()) {}
120 virtual VMOp_Type type() const { return VMOp_CGC_Operation; }
121 virtual void doit();
122 virtual bool doit_prologue();
123 virtual void doit_epilogue();
124 virtual const char* name() const {
125 return "concurrent gc";
126 }
127 };
128
129 #endif // SHARE_VM_GC_G1_VM_OPERATIONS_G1_HPP