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src/cpu/sparc/vm/javaFrameAnchor_sparc.hpp@126ea7725993 (annotated)

src/cpu/sparc/vm/javaFrameAnchor_sparc.hpp

Tue, 03 Aug 2010 08:13:38 -0400

author

bobv

date

Tue, 03 Aug 2010 08:13:38 -0400

changeset 2036

126ea7725993

parent 1907

c18cbe5936b8

child 2314

f95d63e2154a

permissions

-rw-r--r--

6953477: Increase portability and flexibility of building Hotspot
Summary: A collection of portability improvements including shared code support for PPC, ARM platforms, software floating point, cross compilation support and improvements in error crash detail.
Reviewed-by: phh, never, coleenp, dholmes

duke@435	1	/*
trims@1907	2	* Copyright (c) 2002, 2005, 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
duke@435	25	private:
duke@435	26	volatile int _flags;
duke@435	27
duke@435	28	public:
duke@435	29
duke@435	30	enum pd_Constants {
duke@435	31	flushed = 1 // winodows have flushed
duke@435	32	};
duke@435	33
duke@435	34	int flags(void) { return _flags; }
duke@435	35	void set_flags(int flags) { _flags = flags; }
duke@435	36
duke@435	37	static ByteSize flags_offset() { return byte_offset_of(JavaFrameAnchor, _flags); }
duke@435	38
duke@435	39	// Each arch must define clear, copy
duke@435	40	// These are used by objects that only care about:
duke@435	41	// 1 - initializing a new state (thread creation, javaCalls)
duke@435	42	// 2 - saving a current state (javaCalls)
duke@435	43	// 3 - restoring an old state (javaCalls)
duke@435	44
duke@435	45	void clear(void) {
duke@435	46	// clearing _last_Java_sp must be first
duke@435	47	_last_Java_sp = NULL;
duke@435	48	// fence?
duke@435	49	_flags = 0;
duke@435	50	_last_Java_pc = NULL;
duke@435	51	}
duke@435	52
duke@435	53	void copy(JavaFrameAnchor* src) {
duke@435	54	// In order to make sure the transition state is valid for "this"
duke@435	55	// We must clear _last_Java_sp before copying the rest of the new data
duke@435	56	//
duke@435	57	// Hack Alert: Temporary bugfix for 4717480/4721647
duke@435	58	// To act like previous version (pd_cache_state) don't NULL _last_Java_sp
duke@435	59	// unless the value is changing
duke@435	60	//
duke@435	61	if (_last_Java_sp != src->_last_Java_sp)
duke@435	62	_last_Java_sp = NULL;
duke@435	63
duke@435	64	_flags = src->_flags;
duke@435	65	_last_Java_pc = src->_last_Java_pc;
duke@435	66	// Must be last so profiler will always see valid frame if has_last_frame() is true
duke@435	67	_last_Java_sp = src->_last_Java_sp;
duke@435	68	}
duke@435	69
duke@435	70	// Is stack walkable
duke@435	71	inline bool walkable( void) {
duke@435	72	return _flags & flushed;
duke@435	73	}
duke@435	74
duke@435	75	void make_walkable(JavaThread* thread);
duke@435	76
duke@435	77	void set_last_Java_sp(intptr_t* sp) { _last_Java_sp = sp; }
duke@435	78
bobv@2036	79	address last_Java_pc(void) { return _last_Java_pc; }
bobv@2036	80
duke@435	81	// These are only used by friends
duke@435	82	private:
duke@435	83
duke@435	84	intptr_t* last_Java_sp() const {
duke@435	85	// _last_Java_sp will always be a an unbiased stack pointer
duke@435	86	// if is is biased then some setter screwed up. This is
duke@435	87	// deadly.
duke@435	88	#ifdef _LP64
duke@435	89	assert(((intptr_t)_last_Java_sp & 0xF) == 0, "Biased last_Java_sp");
duke@435	90	#endif
duke@435	91	return _last_Java_sp;
duke@435	92	}
duke@435	93
duke@435	94	void capture_last_Java_pc(intptr_t* sp);
duke@435	95
duke@435	96	void set_window_flushed( void) {
duke@435	97	_flags |= flushed;
duke@435	98	OrderAccess::fence();
duke@435	99	}