Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/shared/concurrentGCThread.hpp @ 20804:7848fc12602b
Merge with jdk8u40-b25
| author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
|---|---|
| date | Tue, 07 Apr 2015 14:58:49 +0200 |
| parents | 89152779163c 4e4ebe50c8e3 |
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| rev | line source |
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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 | |
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96 // Terminate VM with error message that SLT needed but not yet created. |
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97 static void report_missing_slt(); |
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98 |
| 342 | 99 SurrogateLockerThread(); |
| 100 | |
| 101 bool is_hidden_from_external_view() const { return true; } | |
| 102 | |
| 103 void loop(); // main method | |
| 104 | |
| 105 void manipulatePLL(SLT_msg_type msg); | |
| 106 | |
| 107 }; | |
| 1972 | 108 |
| 109 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_CONCURRENTGCTHREAD_HPP |