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src/cpu/ppc/vm/javaFrameAnchor_ppc.hpp@70aa912cebe5 (annotated)

src/cpu/ppc/vm/javaFrameAnchor_ppc.hpp

Wed, 15 Apr 2020 11:49:55 +0800

author

aoqi

date

Wed, 15 Apr 2020 11:49:55 +0800

changeset 9852

70aa912cebe5

parent 6876

710a3c8b516e

permissions

-rw-r--r--

Merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* Copyright 2012, 2014 SAP AG. All rights reserved.
aoqi@0	4	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	5	*
aoqi@0	6	* This code is free software; you can redistribute it and/or modify it
aoqi@0	7	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	8	* published by the Free Software Foundation.
aoqi@0	9	*
aoqi@0	10	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	11	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	12	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	13	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	14	* accompanied this code).
aoqi@0	15	*
aoqi@0	16	* You should have received a copy of the GNU General Public License version
aoqi@0	17	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	18	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	19	*
aoqi@0	20	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	21	* or visit www.oracle.com if you need additional information or have any
aoqi@0	22	* questions.
aoqi@0	23	*
aoqi@0	24	*/
aoqi@0	25
aoqi@0	26	#ifndef CPU_PPC_VM_JAVAFRAMEANCHOR_PPC_HPP
aoqi@0	27	#define CPU_PPC_VM_JAVAFRAMEANCHOR_PPC_HPP
aoqi@0	28
aoqi@0	29	public:
aoqi@0	30	// Each arch must define reset, save, restore
aoqi@0	31	// These are used by objects that only care about:
aoqi@0	32	// 1 - initializing a new state (thread creation, javaCalls)
aoqi@0	33	// 2 - saving a current state (javaCalls)
aoqi@0	34	// 3 - restoring an old state (javaCalls)
aoqi@0	35
aoqi@0	36	inline void clear(void) {
aoqi@0	37	// clearing _last_Java_sp must be first
aoqi@0	38	_last_Java_sp = NULL;
aoqi@0	39	// fence?
aoqi@0	40	OrderAccess::release();
aoqi@0	41	_last_Java_pc = NULL;
aoqi@0	42	}
aoqi@0	43
aoqi@0	44	inline void set(intptr_t* sp, address pc) {
aoqi@0	45	_last_Java_pc = pc;
aoqi@0	46	OrderAccess::release();
aoqi@0	47	_last_Java_sp = sp;
aoqi@0	48	}
aoqi@0	49
aoqi@0	50	void copy(JavaFrameAnchor* src) {
aoqi@0	51	// In order to make sure the transition state is valid for "this".
aoqi@0	52	// We must clear _last_Java_sp before copying the rest of the new data.
aoqi@0	53	//
aoqi@0	54	// Hack Alert: Temporary bugfix for 4717480/4721647
aoqi@0	55	// To act like previous version (pd_cache_state) don't NULL _last_Java_sp
aoqi@0	56	// unless the value is changing.
aoqi@0	57	if (_last_Java_sp != src->_last_Java_sp) {
aoqi@0	58	_last_Java_sp = NULL;
aoqi@0	59	OrderAccess::release();
aoqi@0	60	}
aoqi@0	61	_last_Java_pc = src->_last_Java_pc;
aoqi@0	62	// Must be last so profiler will always see valid frame if has_last_frame() is true.
aoqi@0	63	OrderAccess::release();
aoqi@0	64	_last_Java_sp = src->_last_Java_sp;
aoqi@0	65	}
aoqi@0	66
aoqi@0	67	// Always walkable.
aoqi@0	68	bool walkable(void) { return true; }
aoqi@0	69	// Never any thing to do since we are always walkable and can find address of return addresses.
aoqi@0	70	void make_walkable(JavaThread* thread) { }
aoqi@0	71
aoqi@0	72	intptr_t* last_Java_sp(void) const { return _last_Java_sp; }
aoqi@0	73
aoqi@0	74	address last_Java_pc(void) { return _last_Java_pc; }
aoqi@0	75
aoqi@0	76	void set_last_Java_sp(intptr_t* sp) { OrderAccess::release(); _last_Java_sp = sp; }
aoqi@0	77
aoqi@0	78	#endif // CPU_PPC_VM_JAVAFRAMEANCHOR_PPC_HPP