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1 /*
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2 * Copyright 1998-2006 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // This file provides more support for exception handling; see also exceptions.hpp
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26 class PreserveExceptionMark {
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27 private:
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28 Thread* _thread;
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29 Handle _preserved_exception_oop;
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30 int _preserved_exception_line;
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31 const char* _preserved_exception_file;
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32
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33 public:
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34 PreserveExceptionMark(Thread*& thread);
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35 ~PreserveExceptionMark();
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36 };
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37
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38
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39 // This is a clone of PreserveExceptionMark which asserts instead
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40 // of failing when what it wraps generates a pending exception.
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41 // It also addresses bug 6431341.
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42 class CautiouslyPreserveExceptionMark {
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43 private:
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44 Thread* _thread;
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45 Handle _preserved_exception_oop;
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46 int _preserved_exception_line;
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47 const char* _preserved_exception_file;
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48
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49 public:
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50 CautiouslyPreserveExceptionMark(Thread* thread);
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51 ~CautiouslyPreserveExceptionMark();
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52 };
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53
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54
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55 // Like PreserveExceptionMark but allows new exceptions to be generated in
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56 // the body of the mark. If a new exception is generated then the original one
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57 // is discarded.
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58 class WeakPreserveExceptionMark {
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59 private:
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60 Thread* _thread;
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61 Handle _preserved_exception_oop;
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62 int _preserved_exception_line;
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63 const char* _preserved_exception_file;
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64
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65 void preserve();
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66 void restore();
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67
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68 public:
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69 WeakPreserveExceptionMark(Thread* pThread) : _thread(pThread), _preserved_exception_oop() {
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70 if (pThread->has_pending_exception()) {
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71 preserve();
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72 }
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73 }
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74 ~WeakPreserveExceptionMark() {
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75 if (_preserved_exception_oop.not_null()) {
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76 restore();
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77 }
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78 }
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79 };
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80
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81
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82
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83 // use global exception mark when allowing pending exception to be set and
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84 // saving and restoring them
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85 #define PRESERVE_EXCEPTION_MARK Thread* THREAD; PreserveExceptionMark __em(THREAD);
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