• file
• revisions
• annotate
• diff
• comparison
• raw

src/share/vm/code/pcDesc.hpp@e2509677809c (annotated)

src/share/vm/code/pcDesc.hpp

Fri, 08 Nov 2013 01:13:11 -0800

author

vlivanov

date

Fri, 08 Nov 2013 01:13:11 -0800

changeset 6096

e2509677809c

parent 3108

7588156f5cf9

child 6876

710a3c8b516e

permissions

-rw-r--r--

8023037: Race between ciEnv::register_method and nmethod::make_not_entrant_or_zombie
Reviewed-by: kvn, iveresov

duke@435	1	/*
stefank@2314	2	* Copyright (c) 1997, 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 SHARE_VM_CODE_PCDESC_HPP
stefank@2314	26	#define SHARE_VM_CODE_PCDESC_HPP
stefank@2314	27
stefank@2314	28	#include "memory/allocation.hpp"
stefank@2314	29
duke@435	30	// PcDescs map a physical PC (given as offset from start of nmethod) to
duke@435	31	// the corresponding source scope and byte code index.
duke@435	32
duke@435	33	class nmethod;
duke@435	34
duke@435	35	class PcDesc VALUE_OBJ_CLASS_SPEC {
duke@435	36	friend class VMStructs;
duke@435	37	private:
duke@435	38	int _pc_offset; // offset from start of nmethod
duke@435	39	int _scope_decode_offset; // offset for scope in nmethod
duke@435	40	int _obj_decode_offset;
duke@435	41
never@3108	42	enum {
never@3108	43	PCDESC_reexecute = 1 << 0,
never@3108	44	PCDESC_is_method_handle_invoke = 1 << 1,
never@3108	45	PCDESC_return_oop = 1 << 2
never@3108	46	};
never@3108	47
never@3108	48	int _flags;
never@3108	49
never@3108	50	void set_flag(int mask, bool z) {
never@3108	51	_flags = z ? (_flags | mask) : (_flags & ~mask);
never@3108	52	}
cfang@1366	53
duke@435	54	public:
duke@435	55	int pc_offset() const { return _pc_offset; }
duke@435	56	int scope_decode_offset() const { return _scope_decode_offset; }
duke@435	57	int obj_decode_offset() const { return _obj_decode_offset; }
duke@435	58
duke@435	59	void set_pc_offset(int x) { _pc_offset = x; }
duke@435	60	void set_scope_decode_offset(int x) { _scope_decode_offset = x; }
duke@435	61	void set_obj_decode_offset(int x) { _obj_decode_offset = x; }
duke@435	62
duke@435	63	// Constructor (only used for static in nmethod.cpp)
duke@435	64	// Also used by ScopeDesc::sender()]
duke@435	65	PcDesc(int pc_offset, int scope_decode_offset, int obj_decode_offset);
duke@435	66
duke@435	67	enum {
duke@435	68	// upper and lower exclusive limits real offsets:
duke@435	69	lower_offset_limit = -1,
duke@435	70	upper_offset_limit = (unsigned int)-1 >> 1
duke@435	71	};
duke@435	72
cfang@1366	73	// Flags
never@3108	74	bool should_reexecute() const { return (_flags & PCDESC_reexecute) != 0; }
never@3108	75	void set_should_reexecute(bool z) { set_flag(PCDESC_reexecute, z); }
cfang@1366	76
never@1449	77	// Does pd refer to the same information as pd?
never@1449	78	bool is_same_info(const PcDesc* pd) {
never@1449	79	return _scope_decode_offset == pd->_scope_decode_offset &&
never@1449	80	_obj_decode_offset == pd->_obj_decode_offset &&
never@1449	81	_flags == pd->_flags;
never@1449	82	}
never@1449	83
never@3108	84	bool is_method_handle_invoke() const { return (_flags & PCDESC_is_method_handle_invoke) != 0; }
never@3108	85	void set_is_method_handle_invoke(bool z) { set_flag(PCDESC_is_method_handle_invoke, z); }
twisti@1570	86
never@3108	87	bool return_oop() const { return (_flags & PCDESC_return_oop) != 0; }
never@3108	88	void set_return_oop(bool z) { set_flag(PCDESC_return_oop, z); }
kvn@1688	89
duke@435	90	// Returns the real pc
duke@435	91	address real_pc(const nmethod* code) const;
duke@435	92
duke@435	93	void print(nmethod* code);
duke@435	94	bool verify(nmethod* code);
duke@435	95	};
stefank@2314	96
stefank@2314	97	#endif // SHARE_VM_CODE_PCDESC_HPP