Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/g1/vm_operations_g1.hpp @ 14486:4f227ecd7beb
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
Summary: Remove the assumption that G1CollectedHeap::in_cset_fast_test needs to check for NULL references. Most of the time this is not required, making the code doing this check multiple times.
Reviewed-by: stefank, mgerdin, jmasa
author | tschatzl |
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date | Mon, 24 Feb 2014 09:40:49 +0100 |
parents | 37552638d24a |
children | 227a9e5e4b4a |
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342 | 1 /* |
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2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. |
342 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
342 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP | |
27 | |
28 #include "gc_implementation/shared/vmGCOperations.hpp" | |
29 | |
342 | 30 // VM_operations for the G1 collector. |
31 // VM_GC_Operation: | |
32 // - VM_CGC_Operation | |
33 // - VM_G1CollectFull | |
1973 | 34 // - VM_G1OperationWithAllocRequest |
35 // - VM_G1CollectForAllocation | |
36 // - VM_G1IncCollectionPause | |
37 | |
38 class VM_G1OperationWithAllocRequest: public VM_GC_Operation { | |
39 protected: | |
40 size_t _word_size; | |
41 HeapWord* _result; | |
42 bool _pause_succeeded; | |
43 | |
44 public: | |
45 VM_G1OperationWithAllocRequest(unsigned int gc_count_before, | |
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46 size_t word_size, |
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47 GCCause::Cause gc_cause) |
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48 : VM_GC_Operation(gc_count_before, gc_cause), |
1973 | 49 _word_size(word_size), _result(NULL), _pause_succeeded(false) { } |
50 HeapWord* result() { return _result; } | |
51 bool pause_succeeded() { return _pause_succeeded; } | |
52 }; | |
342 | 53 |
54 class VM_G1CollectFull: public VM_GC_Operation { | |
1973 | 55 public: |
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56 VM_G1CollectFull(unsigned int gc_count_before, |
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57 unsigned int full_gc_count_before, |
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58 GCCause::Cause cause) |
2225 | 59 : VM_GC_Operation(gc_count_before, cause, full_gc_count_before) { } |
342 | 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 }; | |
66 | |
1973 | 67 class VM_G1CollectForAllocation: public VM_G1OperationWithAllocRequest { |
68 public: | |
69 VM_G1CollectForAllocation(unsigned int gc_count_before, | |
70 size_t word_size); | |
342 | 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 }; | |
77 | |
1973 | 78 class VM_G1IncCollectionPause: public VM_G1OperationWithAllocRequest { |
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79 private: |
1973 | 80 bool _should_initiate_conc_mark; |
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81 bool _should_retry_gc; |
1973 | 82 double _target_pause_time_ms; |
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83 unsigned int _old_marking_cycles_completed_before; |
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84 public: |
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85 VM_G1IncCollectionPause(unsigned int gc_count_before, |
1973 | 86 size_t word_size, |
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87 bool should_initiate_conc_mark, |
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88 double target_pause_time_ms, |
1973 | 89 GCCause::Cause gc_cause); |
342 | 90 virtual VMOp_Type type() const { return VMOp_G1IncCollectionPause; } |
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91 virtual bool doit_prologue(); |
342 | 92 virtual void doit(); |
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93 virtual void doit_epilogue(); |
342 | 94 virtual const char* name() const { |
95 return "garbage-first incremental collection pause"; | |
96 } | |
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97 bool should_retry_gc() const { return _should_retry_gc; } |
342 | 98 }; |
99 | |
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100 // Concurrent GC stop-the-world operations such as remark and cleanup; |
342 | 101 // consider sharing these with CMS's counterparts. |
102 class VM_CGC_Operation: public VM_Operation { | |
103 VoidClosure* _cl; | |
104 const char* _printGCMessage; | |
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105 bool _needs_pll; |
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106 |
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107 protected: |
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108 // java.lang.ref.Reference support |
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109 void acquire_pending_list_lock(); |
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110 void release_and_notify_pending_list_lock(); |
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111 |
1973 | 112 public: |
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113 VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg, bool needs_pll) |
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114 : _cl(cl), _printGCMessage(printGCMsg), _needs_pll(needs_pll) { } |
342 | 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 }; | |
1972 | 123 |
124 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP |