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src/cpu/zero/vm/javaFrameAnchor_zero.hpp@e16282db4946 (annotated)

src/cpu/zero/vm/javaFrameAnchor_zero.hpp

Tue, 20 Aug 2013 10:57:50 -0700

author

twisti

date

Tue, 20 Aug 2013 10:57:50 -0700

changeset 5545

e16282db4946

parent 2314

f95d63e2154a

child 6876

710a3c8b516e

permissions

-rw-r--r--

8022956: Clang: enable return type warnings on BSD
Reviewed-by: coleenp, sla

never@1445	1	/*
stefank@2314	2	* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
twisti@1860	3	* Copyright 2007, 2008, 2010 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	*
trims@1907	20	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	21	* or visit www.oracle.com if you need additional information or have any
trims@1907	22	* questions.
never@1445	23	*
never@1445	24	*/
never@1445	25
stefank@2314	26	#ifndef CPU_ZERO_VM_JAVAFRAMEANCHOR_ZERO_HPP
stefank@2314	27	#define CPU_ZERO_VM_JAVAFRAMEANCHOR_ZERO_HPP
stefank@2314	28
twisti@1860	29	private:
twisti@1860	30	ZeroFrame* volatile _last_Java_fp;
twisti@1860	31
never@1445	32	public:
never@1445	33	// Each arch must define reset, save, restore
never@1445	34	// These are used by objects that only care about:
never@1445	35	// 1 - initializing a new state (thread creation, javaCalls)
never@1445	36	// 2 - saving a current state (javaCalls)
never@1445	37	// 3 - restoring an old state (javaCalls)
twisti@1860	38	// Note that whenever _last_Java_sp != NULL other anchor fields
twisti@1860	39	// must be valid. The profiler apparently depends on this.
never@1445	40
never@1445	41	void clear() {
never@1445	42	// clearing _last_Java_sp must be first
never@1445	43	_last_Java_sp = NULL;
never@1445	44	// fence?
twisti@1860	45	_last_Java_fp = NULL;
never@1445	46	_last_Java_pc = NULL;
never@1445	47	}
never@1445	48
never@1445	49	void copy(JavaFrameAnchor* src) {
twisti@1860	50	set(src->_last_Java_sp, src->_last_Java_pc, src->_last_Java_fp);
twisti@1860	51	}
twisti@1860	52
twisti@1860	53	void set(intptr_t* sp, address pc, ZeroFrame* fp) {
never@1445	54	// In order to make sure the transition state is valid for "this"
never@1445	55	// We must clear _last_Java_sp before copying the rest of the new
never@1445	56	// data
never@1445	57	//
never@1445	58	// Hack Alert: Temporary bugfix for 4717480/4721647 To act like
never@1445	59	// previous version (pd_cache_state) don't NULL _last_Java_sp
never@1445	60	// unless the value is changing
never@1445	61	//
twisti@1860	62	if (_last_Java_sp != sp)
never@1445	63	_last_Java_sp = NULL;
never@1445	64
twisti@1860	65	_last_Java_fp = fp;
twisti@1860	66	_last_Java_pc = pc;
never@1445	67	// Must be last so profiler will always see valid frame if
never@1445	68	// has_last_frame() is true
twisti@1860	69	_last_Java_sp = sp;
never@1445	70	}
never@1445	71
never@1445	72	bool walkable() {
never@1445	73	return true;
never@1445	74	}
never@1445	75
never@1445	76	void make_walkable(JavaThread* thread) {
never@1445	77	// nothing to do
never@1445	78	}
never@1445	79
never@1445	80	intptr_t* last_Java_sp() const {
never@1445	81	return _last_Java_sp;
never@1445	82	}
never@1445	83
twisti@1860	84	ZeroFrame* last_Java_fp() const {
twisti@1860	85	return _last_Java_fp;
never@1445	86	}
twisti@1867	87
twisti@2084	88	address last_Java_pc() const {
twisti@2084	89	return _last_Java_pc;
twisti@2084	90	}
twisti@2084	91
twisti@1867	92	static ByteSize last_Java_fp_offset() {
twisti@1867	93	return byte_offset_of(JavaFrameAnchor, _last_Java_fp);
twisti@1867	94	}
stefank@2314	95
stefank@2314	96	#endif // CPU_ZERO_VM_JAVAFRAMEANCHOR_ZERO_HPP