Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/parallelScavenge/gcTaskThread.hpp @ 10185:d50cc62e94ff
8012715: G1: GraphKit accesses PtrQueue::_index as int but is size_t
Summary: In graphKit INT operations were generated to access PtrQueue::_index which has type size_t. This is 64 bit on 64-bit machines. No problems occur on little endian machines as long as the index fits into 32 bit, but on big endian machines the upper part is read, which is zero. This leads to unnecessary branches to the slow path in the runtime.
Reviewed-by: twisti, johnc
Contributed-by: Martin Doerr <martin.doerr@sap.com>
| author | johnc |
|---|---|
| date | Wed, 24 Apr 2013 14:48:43 -0700 |
| parents | b9a9ed0f8eeb |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2002, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GCTASKTHREAD_HPP |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GCTASKTHREAD_HPP | |
| 27 | |
| 28 #include "runtime/thread.hpp" | |
| 29 | |
| 0 | 30 // Forward declarations of classes defined here. |
| 31 class GCTaskThread; | |
| 32 class GCTaskTimeStamp; | |
| 33 | |
| 34 // Declarations of classes referenced in this file via pointer. | |
| 35 class GCTaskManager; | |
| 36 | |
| 37 class GCTaskThread : public WorkerThread { | |
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38 friend class GCTaskManager; |
| 0 | 39 private: |
| 40 // Instance state. | |
| 41 GCTaskManager* _manager; // Manager for worker. | |
| 42 const uint _processor_id; // Which processor the worker is on. | |
| 43 | |
| 44 GCTaskTimeStamp* _time_stamps; | |
| 45 uint _time_stamp_index; | |
| 46 | |
| 47 GCTaskTimeStamp* time_stamp_at(uint index); | |
| 48 | |
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49 bool _is_working; // True if participating in GC tasks |
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50 |
| 0 | 51 public: |
| 52 // Factory create and destroy methods. | |
| 53 static GCTaskThread* create(GCTaskManager* manager, | |
| 54 uint which, | |
| 55 uint processor_id) { | |
| 56 return new GCTaskThread(manager, which, processor_id); | |
| 57 } | |
| 58 static void destroy(GCTaskThread* manager) { | |
| 59 if (manager != NULL) { | |
| 60 delete manager; | |
| 61 } | |
| 62 } | |
| 63 // Methods from Thread. | |
| 64 bool is_GC_task_thread() const { | |
| 65 return true; | |
| 66 } | |
| 67 virtual void run(); | |
| 68 // Methods. | |
| 69 void start(); | |
| 70 | |
| 71 void print_task_time_stamps(); | |
| 72 void print_on(outputStream* st) const; | |
| 73 void print() const { print_on(tty); } | |
| 74 | |
| 75 protected: | |
| 76 // Constructor. Clients use factory, but there could be subclasses. | |
| 77 GCTaskThread(GCTaskManager* manager, uint which, uint processor_id); | |
| 78 // Destructor: virtual destructor because of virtual methods. | |
| 79 virtual ~GCTaskThread(); | |
| 80 // Accessors. | |
| 81 GCTaskManager* manager() const { | |
| 82 return _manager; | |
| 83 } | |
| 84 uint which() const { | |
| 85 return id(); | |
| 86 } | |
| 87 uint processor_id() const { | |
| 88 return _processor_id; | |
| 89 } | |
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90 void set_is_working(bool v) { _is_working = v; } |
| 0 | 91 }; |
| 92 | |
| 6197 | 93 class GCTaskTimeStamp : public CHeapObj<mtGC> |
| 0 | 94 { |
| 95 private: | |
| 96 jlong _entry_time; | |
| 97 jlong _exit_time; | |
| 98 char* _name; | |
| 99 | |
| 100 public: | |
| 101 jlong entry_time() { return _entry_time; } | |
| 102 jlong exit_time() { return _exit_time; } | |
| 103 const char* name() const { return (const char*)_name; } | |
| 104 | |
| 105 void set_entry_time(jlong time) { _entry_time = time; } | |
| 106 void set_exit_time(jlong time) { _exit_time = time; } | |
| 107 void set_name(char* name) { _name = name; } | |
| 108 }; | |
| 1972 | 109 |
| 110 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GCTASKTHREAD_HPP |