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src/cpu/x86/vm/javaFrameAnchor_x86.hpp@bb1da64b0492 (annotated)

src/cpu/x86/vm/javaFrameAnchor_x86.hpp

Fri, 16 Aug 2019 16:50:17 +0200

author

eosterlund

date

Fri, 16 Aug 2019 16:50:17 +0200

changeset 9834

bb1da64b0492

parent 8877

f04097176542

child 9041

95a08233f46c

permissions

-rw-r--r--

8229345: Memory leak due to vtable stubs not being shared on SPARC
Reviewed-by: mdoerr, dholmes, kvn

duke@435	1	/*
stefank@2314	2	* Copyright (c) 2002, 2010, 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
stefank@2314	25	#ifndef CPU_X86_VM_JAVAFRAMEANCHOR_X86_HPP
stefank@2314	26	#define CPU_X86_VM_JAVAFRAMEANCHOR_X86_HPP
stefank@2314	27
duke@435	28	private:
duke@435	29
duke@435	30	// FP value associated with _last_Java_sp:
duke@435	31	intptr_t* volatile _last_Java_fp; // pointer is volatile not what it points to
duke@435	32
duke@435	33	public:
duke@435	34	// Each arch must define reset, save, restore
duke@435	35	// These are used by objects that only care about:
duke@435	36	// 1 - initializing a new state (thread creation, javaCalls)
duke@435	37	// 2 - saving a current state (javaCalls)
duke@435	38	// 3 - restoring an old state (javaCalls)
duke@435	39
duke@435	40	void clear(void) {
duke@435	41	// clearing _last_Java_sp must be first
duke@435	42	_last_Java_sp = NULL;
duke@435	43	// fence?
duke@435	44	_last_Java_fp = NULL;
duke@435	45	_last_Java_pc = NULL;
duke@435	46	}
duke@435	47
duke@435	48	void copy(JavaFrameAnchor* src) {
duke@435	49	// In order to make sure the transition state is valid for "this"
duke@435	50	// We must clear _last_Java_sp before copying the rest of the new data
duke@435	51	//
duke@435	52	// Hack Alert: Temporary bugfix for 4717480/4721647
duke@435	53	// To act like previous version (pd_cache_state) don't NULL _last_Java_sp
duke@435	54	// unless the value is changing
duke@435	55	//
duke@435	56	if (_last_Java_sp != src->_last_Java_sp)
duke@435	57	_last_Java_sp = NULL;
duke@435	58
duke@435	59	_last_Java_fp = src->_last_Java_fp;
duke@435	60	_last_Java_pc = src->_last_Java_pc;
duke@435	61	// Must be last so profiler will always see valid frame if has_last_frame() is true
duke@435	62	_last_Java_sp = src->_last_Java_sp;
duke@435	63	}
duke@435	64
kevinw@8877	65	bool walkable(void) { return _last_Java_sp != NULL && _last_Java_pc != NULL; }
kevinw@8877	66	void make_walkable(JavaThread* thread);
kevinw@8877	67	void capture_last_Java_pc(void);
duke@435	68
duke@435	69	intptr_t* last_Java_sp(void) const { return _last_Java_sp; }
duke@435	70
bobv@2036	71	address last_Java_pc(void) { return _last_Java_pc; }
bobv@2036	72
duke@435	73	private:
duke@435	74
duke@435	75	static ByteSize last_Java_fp_offset() { return byte_offset_of(JavaFrameAnchor, _last_Java_fp); }
duke@435	76
duke@435	77	public:
duke@435	78
duke@435	79	void set_last_Java_sp(intptr_t* sp) { _last_Java_sp = sp; }
duke@435	80
duke@435	81	intptr_t* last_Java_fp(void) { return _last_Java_fp; }
duke@435	82	// Assert (last_Java_sp == NULL || fp == NULL)
duke@435	83	void set_last_Java_fp(intptr_t* fp) { _last_Java_fp = fp; }
stefank@2314	84
stefank@2314	85	#endif // CPU_X86_VM_JAVAFRAMEANCHOR_X86_HPP