Mercurial > hg > truffle
annotate src/share/vm/utilities/preserveException.hpp @ 8733:9def4075da6d
8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
Summary: Update the task local finger to the start of the next object when marking aborts, in order to avoid the redundant scanning of all 0's when the marking task restarts, if otherwise updating to the next word. In addition, reuse the routine nextObject() in routine iterate().
Reviewed-by: johnc, ysr
Contributed-by: tamao <tao.mao@oracle.com>
| author | tamao |
|---|---|
| date | Tue, 05 Mar 2013 15:36:56 -0800 |
| parents | f34d701e952e |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1998, 2010, 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_UTILITIES_PRESERVEEXCEPTION_HPP |
| 26 #define SHARE_VM_UTILITIES_PRESERVEEXCEPTION_HPP | |
| 27 | |
| 28 #include "runtime/handles.hpp" | |
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8003935: Simplify the needed includes for using Thread::current()
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29 #include "runtime/thread.inline.hpp" |
| 1972 | 30 |
| 0 | 31 // This file provides more support for exception handling; see also exceptions.hpp |
| 32 class PreserveExceptionMark { | |
| 33 private: | |
| 34 Thread* _thread; | |
| 35 Handle _preserved_exception_oop; | |
| 36 int _preserved_exception_line; | |
| 37 const char* _preserved_exception_file; | |
| 38 | |
| 39 public: | |
| 40 PreserveExceptionMark(Thread*& thread); | |
| 41 ~PreserveExceptionMark(); | |
| 42 }; | |
| 43 | |
| 44 | |
| 45 // This is a clone of PreserveExceptionMark which asserts instead | |
| 46 // of failing when what it wraps generates a pending exception. | |
| 47 // It also addresses bug 6431341. | |
| 48 class CautiouslyPreserveExceptionMark { | |
| 49 private: | |
| 50 Thread* _thread; | |
| 51 Handle _preserved_exception_oop; | |
| 52 int _preserved_exception_line; | |
| 53 const char* _preserved_exception_file; | |
| 54 | |
| 55 public: | |
| 56 CautiouslyPreserveExceptionMark(Thread* thread); | |
| 57 ~CautiouslyPreserveExceptionMark(); | |
| 58 }; | |
| 59 | |
| 60 | |
| 61 // Like PreserveExceptionMark but allows new exceptions to be generated in | |
| 62 // the body of the mark. If a new exception is generated then the original one | |
| 63 // is discarded. | |
| 64 class WeakPreserveExceptionMark { | |
| 65 private: | |
| 66 Thread* _thread; | |
| 67 Handle _preserved_exception_oop; | |
| 68 int _preserved_exception_line; | |
| 69 const char* _preserved_exception_file; | |
| 70 | |
| 71 void preserve(); | |
| 72 void restore(); | |
| 73 | |
| 74 public: | |
| 75 WeakPreserveExceptionMark(Thread* pThread) : _thread(pThread), _preserved_exception_oop() { | |
| 76 if (pThread->has_pending_exception()) { | |
| 77 preserve(); | |
| 78 } | |
| 79 } | |
| 80 ~WeakPreserveExceptionMark() { | |
| 81 if (_preserved_exception_oop.not_null()) { | |
| 82 restore(); | |
| 83 } | |
| 84 } | |
| 85 }; | |
| 86 | |
| 87 | |
| 88 | |
| 89 // use global exception mark when allowing pending exception to be set and | |
| 90 // saving and restoring them | |
| 91 #define PRESERVE_EXCEPTION_MARK Thread* THREAD; PreserveExceptionMark __em(THREAD); | |
| 1972 | 92 |
| 93 #endif // SHARE_VM_UTILITIES_PRESERVEEXCEPTION_HPP |