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src/cpu/zero/vm/javaFrameAnchor_zero.hpp@b6f06e395428 (annotated)

src/cpu/zero/vm/javaFrameAnchor_zero.hpp

Tue, 05 Jan 2010 11:14:54 -0800

author

never

date

Tue, 05 Jan 2010 11:14:54 -0800

changeset 1574

b6f06e395428

parent 1445

354d3184f6b2

child 1860

0c5b3cf3c1f5

permissions

-rw-r--r--

6908267: Zero fails to unlock synchronized native methods on exception
Reviewed-by: never
Contributed-by: Gary Benson <gbenson@redhat.com>

never@1445	1	/*
never@1445	2	* Copyright 2003-2005 Sun Microsystems, Inc. All Rights Reserved.
never@1445	3	* Copyright 2007, 2008 Red Hat, Inc.
never@1445	4	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
never@1445	5	*
never@1445	6	* This code is free software; you can redistribute it and/or modify it
never@1445	7	* under the terms of the GNU General Public License version 2 only, as
never@1445	8	* published by the Free Software Foundation.
never@1445	9	*
never@1445	10	* This code is distributed in the hope that it will be useful, but WITHOUT
never@1445	11	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
never@1445	12	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
never@1445	13	* version 2 for more details (a copy is included in the LICENSE file that
never@1445	14	* accompanied this code).
never@1445	15	*
never@1445	16	* You should have received a copy of the GNU General Public License version
never@1445	17	* 2 along with this work; if not, write to the Free Software Foundation,
never@1445	18	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
never@1445	19	*
never@1445	20	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
never@1445	21	* CA 95054 USA or visit www.sun.com if you need additional information or
never@1445	22	* have any questions.
never@1445	23	*
never@1445	24	*/
never@1445	25
never@1445	26	public:
never@1445	27	// Each arch must define reset, save, restore
never@1445	28	// These are used by objects that only care about:
never@1445	29	// 1 - initializing a new state (thread creation, javaCalls)
never@1445	30	// 2 - saving a current state (javaCalls)
never@1445	31	// 3 - restoring an old state (javaCalls)
never@1445	32
never@1445	33	void clear() {
never@1445	34	// clearing _last_Java_sp must be first
never@1445	35	_last_Java_sp = NULL;
never@1445	36	// fence?
never@1445	37	_last_Java_pc = NULL;
never@1445	38	}
never@1445	39
never@1445	40	void copy(JavaFrameAnchor* src) {
never@1445	41	// In order to make sure the transition state is valid for "this"
never@1445	42	// We must clear _last_Java_sp before copying the rest of the new
never@1445	43	// data
never@1445	44	//
never@1445	45	// Hack Alert: Temporary bugfix for 4717480/4721647 To act like
never@1445	46	// previous version (pd_cache_state) don't NULL _last_Java_sp
never@1445	47	// unless the value is changing
never@1445	48	//
never@1445	49	if (_last_Java_sp != src->_last_Java_sp)
never@1445	50	_last_Java_sp = NULL;
never@1445	51
never@1445	52	_last_Java_pc = src->_last_Java_pc;
never@1445	53	// Must be last so profiler will always see valid frame if
never@1445	54	// has_last_frame() is true
never@1445	55	_last_Java_sp = src->_last_Java_sp;
never@1445	56	}
never@1445	57
never@1445	58	bool walkable() {
never@1445	59	return true;
never@1445	60	}
never@1445	61
never@1445	62	void make_walkable(JavaThread* thread) {
never@1445	63	// nothing to do
never@1445	64	}
never@1445	65
never@1445	66	intptr_t* last_Java_sp() const {
never@1445	67	return _last_Java_sp;
never@1445	68	}
never@1445	69
never@1445	70	void set_last_Java_sp(intptr_t* sp) {
never@1445	71	_last_Java_sp = sp;
never@1445	72	}