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src/share/vm/utilities/preserveException.cpp@a9becfeecd1b (annotated)

src/share/vm/utilities/preserveException.cpp

Wed, 22 Jan 2014 17:42:23 -0800

author

kvn

date

Wed, 22 Jan 2014 17:42:23 -0800

changeset 6503

a9becfeecd1b

parent 4153

b9a9ed0f8eeb

child 6876

710a3c8b516e

permissions

-rw-r--r--

Merge

duke@435	1	/*
mikael@4153	2	* Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#include "precompiled.hpp"
stefank@2314	26	#include "runtime/handles.inline.hpp"
stefank@2314	27	#include "utilities/preserveException.hpp"
duke@435	28
duke@435	29	// TODO: These three classes should be refactored
duke@435	30
duke@435	31	PreserveExceptionMark::PreserveExceptionMark(Thread*& thread) {
duke@435	32	thread = Thread::current();
duke@435	33	_thread = thread;
duke@435	34	_preserved_exception_oop = Handle(thread, _thread->pending_exception());
duke@435	35	_preserved_exception_line = _thread->exception_line();
duke@435	36	_preserved_exception_file = _thread->exception_file();
minqi@3543	37	_thread->clear_pending_exception(); // Needed to avoid infinite recursion
duke@435	38	}
duke@435	39
duke@435	40
duke@435	41	PreserveExceptionMark::~PreserveExceptionMark() {
duke@435	42	if (_thread->has_pending_exception()) {
duke@435	43	oop exception = _thread->pending_exception();
duke@435	44	_thread->clear_pending_exception(); // Needed to avoid infinite recursion
duke@435	45	exception->print();
duke@435	46	fatal("PreserveExceptionMark destructor expects no pending exceptions");
duke@435	47	}
duke@435	48	if (_preserved_exception_oop() != NULL) {
duke@435	49	_thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
duke@435	50	}
duke@435	51	}
duke@435	52
duke@435	53
duke@435	54	// This code is cloned from PreserveExceptionMark, except that:
duke@435	55	// returned pending exceptions do not cause a crash.
duke@435	56	// thread is passed in, not set (not a reference parameter)
duke@435	57	// and bug 6431341 has been addressed.
duke@435	58
duke@435	59	CautiouslyPreserveExceptionMark::CautiouslyPreserveExceptionMark(Thread* thread) {
duke@435	60	_thread = thread;
duke@435	61	_preserved_exception_oop = Handle(thread, _thread->pending_exception());
duke@435	62	_preserved_exception_line = _thread->exception_line();
duke@435	63	_preserved_exception_file = _thread->exception_file();
duke@435	64	_thread->clear_pending_exception(); // Pending exceptions are checked in the destructor
duke@435	65	}
duke@435	66
duke@435	67
duke@435	68	CautiouslyPreserveExceptionMark::~CautiouslyPreserveExceptionMark() {
duke@435	69	assert(!_thread->has_pending_exception(), "unexpected exception generated");
duke@435	70	if (_thread->has_pending_exception()) {
duke@435	71	_thread->clear_pending_exception();
duke@435	72	}
duke@435	73	if (_preserved_exception_oop() != NULL) {
duke@435	74	_thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
duke@435	75	}
duke@435	76	}
duke@435	77
duke@435	78
duke@435	79	void WeakPreserveExceptionMark::preserve() {
duke@435	80	_preserved_exception_oop = Handle(_thread, _thread->pending_exception());
duke@435	81	_preserved_exception_line = _thread->exception_line();
duke@435	82	_preserved_exception_file = _thread->exception_file();
duke@435	83	_thread->clear_pending_exception();
duke@435	84	}
duke@435	85
duke@435	86	void WeakPreserveExceptionMark::restore() {
duke@435	87	if (!_thread->has_pending_exception()) {
duke@435	88	_thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
duke@435	89	}
duke@435	90	}