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1 /* |
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2 * Copyright (c) 1998, 2012, Oracle and/or its affiliates. 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 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. |
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22 * |
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23 */ |
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24 |
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25 #include "precompiled.hpp" |
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26 #include "runtime/handles.inline.hpp" |
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27 #include "utilities/preserveException.hpp" |
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28 |
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29 // TODO: These three classes should be refactored |
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30 |
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31 PreserveExceptionMark::PreserveExceptionMark(Thread*& thread) { |
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32 thread = Thread::current(); |
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33 _thread = thread; |
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34 _preserved_exception_oop = Handle(thread, _thread->pending_exception()); |
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35 _preserved_exception_line = _thread->exception_line(); |
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36 _preserved_exception_file = _thread->exception_file(); |
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37 _thread->clear_pending_exception(); // Needed to avoid infinite recursion |
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38 } |
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39 |
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40 |
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41 PreserveExceptionMark::~PreserveExceptionMark() { |
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42 if (_thread->has_pending_exception()) { |
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43 oop exception = _thread->pending_exception(); |
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44 _thread->clear_pending_exception(); // Needed to avoid infinite recursion |
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45 exception->print(); |
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46 fatal("PreserveExceptionMark destructor expects no pending exceptions"); |
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47 } |
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48 if (_preserved_exception_oop() != NULL) { |
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49 _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line); |
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50 } |
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51 } |
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52 |
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53 |
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54 // This code is cloned from PreserveExceptionMark, except that: |
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55 // returned pending exceptions do not cause a crash. |
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56 // thread is passed in, not set (not a reference parameter) |
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57 // and bug 6431341 has been addressed. |
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58 |
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59 CautiouslyPreserveExceptionMark::CautiouslyPreserveExceptionMark(Thread* thread) { |
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60 _thread = thread; |
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61 _preserved_exception_oop = Handle(thread, _thread->pending_exception()); |
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62 _preserved_exception_line = _thread->exception_line(); |
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63 _preserved_exception_file = _thread->exception_file(); |
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64 _thread->clear_pending_exception(); // Pending exceptions are checked in the destructor |
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65 } |
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66 |
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67 |
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68 CautiouslyPreserveExceptionMark::~CautiouslyPreserveExceptionMark() { |
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69 assert(!_thread->has_pending_exception(), "unexpected exception generated"); |
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70 if (_thread->has_pending_exception()) { |
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71 _thread->clear_pending_exception(); |
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72 } |
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73 if (_preserved_exception_oop() != NULL) { |
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74 _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line); |
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75 } |
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76 } |
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77 |
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78 |
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79 void WeakPreserveExceptionMark::preserve() { |
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80 _preserved_exception_oop = Handle(_thread, _thread->pending_exception()); |
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81 _preserved_exception_line = _thread->exception_line(); |
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82 _preserved_exception_file = _thread->exception_file(); |
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83 _thread->clear_pending_exception(); |
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84 } |
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85 |
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86 void WeakPreserveExceptionMark::restore() { |
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87 if (!_thread->has_pending_exception()) { |
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88 _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line); |
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89 } |
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90 } |