Mercurial > hg > truffle
annotate src/share/vm/utilities/preserveException.cpp @ 2177:3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
Summary: move symbols from permgen into C heap and reference count them
Reviewed-by: never, acorn, jmasa, stefank
| author | coleenp |
|---|---|
| date | Thu, 27 Jan 2011 16:11:27 -0800 |
| parents | f95d63e2154a |
| children | 1b0e0f8be510 |
| 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 #include "precompiled.hpp" |
| 26 #include "runtime/handles.inline.hpp" | |
| 27 #include "utilities/preserveException.hpp" | |
| 0 | 28 |
| 29 // TODO: These three classes should be refactored | |
| 30 | |
| 31 PreserveExceptionMark::PreserveExceptionMark(Thread*& thread) { | |
| 32 thread = Thread::current(); | |
| 33 _thread = thread; | |
| 34 _preserved_exception_oop = Handle(thread, _thread->pending_exception()); | |
| 35 _thread->clear_pending_exception(); // Needed to avoid infinite recursion | |
| 36 _preserved_exception_line = _thread->exception_line(); | |
| 37 _preserved_exception_file = _thread->exception_file(); | |
| 38 } | |
| 39 | |
| 40 | |
| 41 PreserveExceptionMark::~PreserveExceptionMark() { | |
| 42 if (_thread->has_pending_exception()) { | |
| 43 oop exception = _thread->pending_exception(); | |
| 44 _thread->clear_pending_exception(); // Needed to avoid infinite recursion | |
| 45 exception->print(); | |
| 46 fatal("PreserveExceptionMark destructor expects no pending exceptions"); | |
| 47 } | |
| 48 if (_preserved_exception_oop() != NULL) { | |
| 49 _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line); | |
| 50 } | |
| 51 } | |
| 52 | |
| 53 | |
| 54 // This code is cloned from PreserveExceptionMark, except that: | |
| 55 // returned pending exceptions do not cause a crash. | |
| 56 // thread is passed in, not set (not a reference parameter) | |
| 57 // and bug 6431341 has been addressed. | |
| 58 | |
| 59 CautiouslyPreserveExceptionMark::CautiouslyPreserveExceptionMark(Thread* thread) { | |
| 60 _thread = thread; | |
| 61 _preserved_exception_oop = Handle(thread, _thread->pending_exception()); | |
| 62 _preserved_exception_line = _thread->exception_line(); | |
| 63 _preserved_exception_file = _thread->exception_file(); | |
| 64 _thread->clear_pending_exception(); // Pending exceptions are checked in the destructor | |
| 65 } | |
| 66 | |
| 67 | |
| 68 CautiouslyPreserveExceptionMark::~CautiouslyPreserveExceptionMark() { | |
| 69 assert(!_thread->has_pending_exception(), "unexpected exception generated"); | |
| 70 if (_thread->has_pending_exception()) { | |
| 71 _thread->clear_pending_exception(); | |
| 72 } | |
| 73 if (_preserved_exception_oop() != NULL) { | |
| 74 _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line); | |
| 75 } | |
| 76 } | |
| 77 | |
| 78 | |
| 79 void WeakPreserveExceptionMark::preserve() { | |
| 80 _preserved_exception_oop = Handle(_thread, _thread->pending_exception()); | |
| 81 _preserved_exception_line = _thread->exception_line(); | |
| 82 _preserved_exception_file = _thread->exception_file(); | |
| 83 _thread->clear_pending_exception(); | |
| 84 } | |
| 85 | |
| 86 void WeakPreserveExceptionMark::restore() { | |
| 87 if (!_thread->has_pending_exception()) { | |
| 88 _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line); | |
| 89 } | |
| 90 } |