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src/share/vm/code/pcDesc.hpp@1b4e6a5d98e0 (annotated)

src/share/vm/code/pcDesc.hpp

Mon, 28 Feb 2011 06:07:12 -0800

author

twisti

date

Mon, 28 Feb 2011 06:07:12 -0800

changeset 2603

1b4e6a5d98e0

parent 2314

f95d63e2154a

child 3108

7588156f5cf9

permissions

-rw-r--r--

7012914: JSR 292 MethodHandlesTest C1: frame::verify_return_pc(return_address) failed: must be a return pc
Reviewed-by: never, bdelsart

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
cfang@1366	42	union PcDescFlags {
cfang@1366	43	int word;
cfang@1366	44	struct {
cfang@1366	45	unsigned int reexecute: 1;
twisti@1570	46	unsigned int is_method_handle_invoke: 1;
kvn@1688	47	unsigned int return_oop: 1;
cfang@1366	48	} bits;
never@1449	49	bool operator ==(const PcDescFlags& other) { return word == other.word; }
cfang@1366	50	} _flags;
cfang@1366	51
duke@435	52	public:
duke@435	53	int pc_offset() const { return _pc_offset; }
duke@435	54	int scope_decode_offset() const { return _scope_decode_offset; }
duke@435	55	int obj_decode_offset() const { return _obj_decode_offset; }
duke@435	56
duke@435	57	void set_pc_offset(int x) { _pc_offset = x; }
duke@435	58	void set_scope_decode_offset(int x) { _scope_decode_offset = x; }
duke@435	59	void set_obj_decode_offset(int x) { _obj_decode_offset = x; }
duke@435	60
duke@435	61	// Constructor (only used for static in nmethod.cpp)
duke@435	62	// Also used by ScopeDesc::sender()]
duke@435	63	PcDesc(int pc_offset, int scope_decode_offset, int obj_decode_offset);
duke@435	64
duke@435	65	enum {
duke@435	66	// upper and lower exclusive limits real offsets:
duke@435	67	lower_offset_limit = -1,
duke@435	68	upper_offset_limit = (unsigned int)-1 >> 1
duke@435	69	};
duke@435	70
cfang@1366	71	// Flags
cfang@1366	72	bool should_reexecute() const { return _flags.bits.reexecute; }
cfang@1366	73	void set_should_reexecute(bool z) { _flags.bits.reexecute = z; }
cfang@1366	74
never@1449	75	// Does pd refer to the same information as pd?
never@1449	76	bool is_same_info(const PcDesc* pd) {
never@1449	77	return _scope_decode_offset == pd->_scope_decode_offset &&
never@1449	78	_obj_decode_offset == pd->_obj_decode_offset &&
never@1449	79	_flags == pd->_flags;
never@1449	80	}
never@1449	81
twisti@1570	82	bool is_method_handle_invoke() const { return _flags.bits.is_method_handle_invoke; }
twisti@1570	83	void set_is_method_handle_invoke(bool z) { _flags.bits.is_method_handle_invoke = z; }
twisti@1570	84
kvn@1688	85	bool return_oop() const { return _flags.bits.return_oop; }
kvn@1688	86	void set_return_oop(bool z) { _flags.bits.return_oop = z; }
kvn@1688	87
duke@435	88	// Returns the real pc
duke@435	89	address real_pc(const nmethod* code) const;
duke@435	90
duke@435	91	void print(nmethod* code);
duke@435	92	bool verify(nmethod* code);
duke@435	93	};
stefank@2314	94
stefank@2314	95	#endif // SHARE_VM_CODE_PCDESC_HPP