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src/share/vm/utilities/preserveException.cpp@0414c1049f15 (annotated)

src/share/vm/utilities/preserveException.cpp

Thu, 11 Feb 2010 15:52:19 -0800

author

iveresov

date

Thu, 11 Feb 2010 15:52:19 -0800

changeset 1696

0414c1049f15

parent 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6923991: G1: improve scalability of RSet scanning
Summary: Implemented block-based work stealing. Moved copying during the rset scanning phase to the main copying phase. Made the size of rset table depend on the region size.
Reviewed-by: apetrusenko, tonyp

duke@435	1	/*
duke@435	2	* Copyright 1998-2006 Sun Microsystems, Inc. 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	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	#include "incls/_precompiled.incl"
duke@435	26	#include "incls/_preserveException.cpp.incl"
duke@435	27
duke@435	28	// TODO: These three classes should be refactored
duke@435	29
duke@435	30	PreserveExceptionMark::PreserveExceptionMark(Thread*& thread) {
duke@435	31	thread = Thread::current();
duke@435	32	_thread = thread;
duke@435	33	_preserved_exception_oop = Handle(thread, _thread->pending_exception());
duke@435	34	_thread->clear_pending_exception(); // Needed to avoid infinite recursion
duke@435	35	_preserved_exception_line = _thread->exception_line();
duke@435	36	_preserved_exception_file = _thread->exception_file();
duke@435	37	}
duke@435	38
duke@435	39
duke@435	40	PreserveExceptionMark::~PreserveExceptionMark() {
duke@435	41	if (_thread->has_pending_exception()) {
duke@435	42	oop exception = _thread->pending_exception();
duke@435	43	_thread->clear_pending_exception(); // Needed to avoid infinite recursion
duke@435	44	exception->print();
duke@435	45	fatal("PreserveExceptionMark destructor expects no pending exceptions");
duke@435	46	}
duke@435	47	if (_preserved_exception_oop() != NULL) {
duke@435	48	_thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
duke@435	49	}
duke@435	50	}
duke@435	51
duke@435	52
duke@435	53	// This code is cloned from PreserveExceptionMark, except that:
duke@435	54	// returned pending exceptions do not cause a crash.
duke@435	55	// thread is passed in, not set (not a reference parameter)
duke@435	56	// and bug 6431341 has been addressed.
duke@435	57
duke@435	58	CautiouslyPreserveExceptionMark::CautiouslyPreserveExceptionMark(Thread* thread) {
duke@435	59	_thread = thread;
duke@435	60	_preserved_exception_oop = Handle(thread, _thread->pending_exception());
duke@435	61	_preserved_exception_line = _thread->exception_line();
duke@435	62	_preserved_exception_file = _thread->exception_file();
duke@435	63	_thread->clear_pending_exception(); // Pending exceptions are checked in the destructor
duke@435	64	}
duke@435	65
duke@435	66
duke@435	67	CautiouslyPreserveExceptionMark::~CautiouslyPreserveExceptionMark() {
duke@435	68	assert(!_thread->has_pending_exception(), "unexpected exception generated");
duke@435	69	if (_thread->has_pending_exception()) {
duke@435	70	_thread->clear_pending_exception();
duke@435	71	}
duke@435	72	if (_preserved_exception_oop() != NULL) {
duke@435	73	_thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
duke@435	74	}
duke@435	75	}
duke@435	76
duke@435	77
duke@435	78	void WeakPreserveExceptionMark::preserve() {
duke@435	79	_preserved_exception_oop = Handle(_thread, _thread->pending_exception());
duke@435	80	_preserved_exception_line = _thread->exception_line();
duke@435	81	_preserved_exception_file = _thread->exception_file();
duke@435	82	_thread->clear_pending_exception();
duke@435	83	}
duke@435	84
duke@435	85	void WeakPreserveExceptionMark::restore() {
duke@435	86	if (!_thread->has_pending_exception()) {
duke@435	87	_thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
duke@435	88	}
duke@435	89	}