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annotate src/share/vm/gc_implementation/shared/concurrentGCThread.hpp @ 20446:c10b463abc6e
8057824: methods to copy allocation context statistics
Reviewed-by: mikael, jmasa, tschatzl
author | jcoomes |
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date | Wed, 10 Sep 2014 13:01:13 -0700 |
parents | 581e70386ec9 |
children | 4e4ebe50c8e3 |
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342 | 1 /* |
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2 * Copyright (c) 2001, 2013, 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_SHARED_CONCURRENTGCTHREAD_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_CONCURRENTGCTHREAD_HPP | |
27 | |
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28 #include "utilities/macros.hpp" |
20192 | 29 #include "gc_implementation/shared/suspendibleThreadSet.hpp" |
1972 | 30 #include "runtime/thread.hpp" |
342 | 31 |
32 class ConcurrentGCThread: public NamedThread { | |
33 friend class VMStructs; | |
34 | |
35 protected: | |
794 | 36 bool _should_terminate; |
37 bool _has_terminated; | |
342 | 38 |
39 enum CGC_flag_type { | |
40 CGC_nil = 0x0, | |
41 CGC_dont_suspend = 0x1, | |
42 CGC_CGC_safepoint = 0x2, | |
43 CGC_VM_safepoint = 0x4 | |
44 }; | |
45 | |
46 static int _CGC_flag; | |
47 | |
48 static bool CGC_flag_is_set(int b) { return (_CGC_flag & b) != 0; } | |
49 static int set_CGC_flag(int b) { return _CGC_flag |= b; } | |
50 static int reset_CGC_flag(int b) { return _CGC_flag &= ~b; } | |
51 | |
52 // Create and start the thread (setting it's priority high.) | |
53 void create_and_start(); | |
54 | |
55 // Do initialization steps in the thread: record stack base and size, | |
56 // init thread local storage, set JNI handle block. | |
57 void initialize_in_thread(); | |
58 | |
59 // Wait until Universe::is_fully_initialized(); | |
60 void wait_for_universe_init(); | |
61 | |
62 // Record that the current thread is terminating, and will do more | |
63 // concurrent work. | |
64 void terminate(); | |
65 | |
66 public: | |
67 // Constructor | |
68 | |
69 ConcurrentGCThread(); | |
70 ~ConcurrentGCThread() {} // Exists to call NamedThread destructor. | |
71 | |
72 // Tester | |
73 bool is_ConcurrentGC_thread() const { return true; } | |
74 }; | |
75 | |
76 // The SurrogateLockerThread is used by concurrent GC threads for | |
77 // manipulating Java monitors, in particular, currently for | |
78 // manipulating the pending_list_lock. XXX | |
79 class SurrogateLockerThread: public JavaThread { | |
80 friend class VMStructs; | |
81 public: | |
82 enum SLT_msg_type { | |
83 empty = 0, // no message | |
84 acquirePLL, // acquire pending list lock | |
85 releaseAndNotifyPLL // notify and release pending list lock | |
86 }; | |
87 private: | |
88 // the following are shared with the CMSThread | |
89 SLT_msg_type _buffer; // communication buffer | |
90 Monitor _monitor; // monitor controlling buffer | |
91 BasicLock _basicLock; // used for PLL locking | |
92 | |
93 public: | |
94 static SurrogateLockerThread* make(TRAPS); | |
95 | |
96 SurrogateLockerThread(); | |
97 | |
98 bool is_hidden_from_external_view() const { return true; } | |
99 | |
100 void loop(); // main method | |
101 | |
102 void manipulatePLL(SLT_msg_type msg); | |
103 | |
104 }; | |
1972 | 105 |
106 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_CONCURRENTGCTHREAD_HPP |