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src/share/vm/runtime/registerMap.hpp@2d8a650513c2 (annotated)

src/share/vm/runtime/registerMap.hpp

Fri, 29 Apr 2016 00:06:10 +0800

author

aoqi

date

Fri, 29 Apr 2016 00:06:10 +0800

changeset 1

2d8a650513c2

parent 0

f90c822e73f8

child 6876

710a3c8b516e

permissions

-rw-r--r--

Added MIPS 64-bit port.

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2002, 2011, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@1	25	/*
aoqi@1	26	* This file has been modified by Loongson Technology in 2015. These
aoqi@1	27	* modifications are Copyright (c) 2015 Loongson Technology, and are made
aoqi@1	28	* available on the same license terms set forth above.
aoqi@1	29	*/
aoqi@1	30
aoqi@0	31	#ifndef SHARE_VM_RUNTIME_REGISTERMAP_HPP
aoqi@0	32	#define SHARE_VM_RUNTIME_REGISTERMAP_HPP
aoqi@0	33
aoqi@0	34	#include "code/vmreg.hpp"
aoqi@0	35	#include "utilities/globalDefinitions.hpp"
aoqi@0	36	#ifdef TARGET_ARCH_x86
aoqi@0	37	# include "register_x86.hpp"
aoqi@0	38	#endif
aoqi@0	39	#ifdef TARGET_ARCH_sparc
aoqi@0	40	# include "register_sparc.hpp"
aoqi@0	41	#endif
aoqi@0	42	#ifdef TARGET_ARCH_zero
aoqi@0	43	# include "register_zero.hpp"
aoqi@0	44	#endif
aoqi@0	45	#ifdef TARGET_ARCH_arm
aoqi@0	46	# include "register_arm.hpp"
aoqi@0	47	#endif
aoqi@0	48	#ifdef TARGET_ARCH_ppc
aoqi@0	49	# include "register_ppc.hpp"
aoqi@0	50	#endif
aoqi@1	51	#ifdef TARGET_ARCH_mips
aoqi@1	52	# include "register_mips.hpp"
aoqi@1	53	#endif
aoqi@0	54
aoqi@0	55	class JavaThread;
aoqi@0	56
aoqi@0	57	//
aoqi@0	58	// RegisterMap
aoqi@0	59	//
aoqi@0	60	// A companion structure used for stack traversal. The RegisterMap contains
aoqi@0	61	// misc. information needed in order to do correct stack traversal of stack
aoqi@0	62	// frames. Hence, it must always be passed in as an argument to
aoqi@0	63	// frame::sender(RegisterMap*).
aoqi@0	64	//
aoqi@0	65	// In particular,
aoqi@0	66	// 1) It provides access to the thread for which the stack belongs. The
aoqi@0	67	// thread object is needed in order to get sender of a deoptimized frame.
aoqi@0	68	//
aoqi@0	69	// 2) It is used to pass information from a callee frame to its caller
aoqi@0	70	// frame about how the frame should be traversed. This is used to let
aoqi@0	71	// the caller frame take care of calling oops-do of out-going
aoqi@0	72	// arguments, when the callee frame is not instantiated yet. This
aoqi@0	73	// happens, e.g., when a compiled frame calls into
aoqi@0	74	// resolve_virtual_call. (Hence, it is critical that the same
aoqi@0	75	// RegisterMap object is used for the entire stack walk. Normally,
aoqi@0	76	// this is hidden by using the StackFrameStream.) This is used when
aoqi@0	77	// doing follow_oops and oops_do.
aoqi@0	78	//
aoqi@0	79	// 3) The RegisterMap keeps track of the values of callee-saved registers
aoqi@0	80	// from frame to frame (hence, the name). For some stack traversal the
aoqi@0	81	// values of the callee-saved registers does not matter, e.g., if you
aoqi@0	82	// only need the static properies such as frame type, pc, and such.
aoqi@0	83	// Updating of the RegisterMap can be turned off by instantiating the
aoqi@0	84	// register map as: RegisterMap map(thread, false);
aoqi@0	85
aoqi@0	86	class RegisterMap : public StackObj {
aoqi@0	87	public:
aoqi@0	88	typedef julong LocationValidType;
aoqi@0	89	enum {
aoqi@0	90	reg_count = ConcreteRegisterImpl::number_of_registers,
aoqi@0	91	location_valid_type_size = sizeof(LocationValidType)*8,
aoqi@0	92	location_valid_size = (reg_count+location_valid_type_size-1)/location_valid_type_size
aoqi@0	93	};
aoqi@0	94	private:
aoqi@0	95	intptr_t* _location[reg_count]; // Location of registers (intptr_t* looks better than address in the debugger)
aoqi@0	96	LocationValidType _location_valid[location_valid_size];
aoqi@0	97	bool _include_argument_oops; // Should include argument_oop marked locations for compiler
aoqi@0	98	JavaThread* _thread; // Reference to current thread
aoqi@0	99	bool _update_map; // Tells if the register map need to be
aoqi@0	100	// updated when traversing the stack
aoqi@0	101
aoqi@0	102	#ifdef ASSERT
aoqi@0	103	void check_location_valid();
aoqi@0	104	#else
aoqi@0	105	void check_location_valid() {}
aoqi@0	106	#endif
aoqi@0	107
aoqi@0	108	public:
aoqi@0	109	debug_only(intptr_t* _update_for_id;) // Assert that RegisterMap is not updated twice for same frame
aoqi@0	110	RegisterMap(JavaThread *thread, bool update_map = true);
aoqi@0	111	RegisterMap(const RegisterMap* map);
aoqi@0	112
aoqi@0	113	address location(VMReg reg) const {
aoqi@0	114	int index = reg->value() / location_valid_type_size;
aoqi@0	115	assert(0 <= reg->value() && reg->value() < reg_count, "range check");
aoqi@0	116	assert(0 <= index && index < location_valid_size, "range check");
aoqi@0	117	if (_location_valid[index] & ((LocationValidType)1 << (reg->value() % location_valid_type_size))) {
aoqi@0	118	return (address) _location[reg->value()];
aoqi@0	119	} else {
aoqi@0	120	return pd_location(reg);
aoqi@0	121	}
aoqi@0	122	}
aoqi@0	123
aoqi@0	124	void set_location(VMReg reg, address loc) {
aoqi@0	125	int index = reg->value() / location_valid_type_size;
aoqi@0	126	assert(0 <= reg->value() && reg->value() < reg_count, "range check");
aoqi@0	127	assert(0 <= index && index < location_valid_size, "range check");
aoqi@0	128	assert(_update_map, "updating map that does not need updating");
aoqi@0	129	_location[reg->value()] = (intptr_t*) loc;
aoqi@0	130	_location_valid[index] |= ((LocationValidType)1 << (reg->value() % location_valid_type_size));
aoqi@0	131	check_location_valid();
aoqi@0	132	}
aoqi@0	133
aoqi@0	134	// Called by an entry frame.
aoqi@0	135	void clear();
aoqi@0	136
aoqi@0	137	bool include_argument_oops() const { return _include_argument_oops; }
aoqi@0	138	void set_include_argument_oops(bool f) { _include_argument_oops = f; }
aoqi@0	139
aoqi@0	140	JavaThread *thread() const { return _thread; }
aoqi@0	141	bool update_map() const { return _update_map; }
aoqi@0	142
aoqi@0	143	void print_on(outputStream* st) const;
aoqi@0	144	void print() const;
aoqi@0	145
aoqi@0	146	// the following contains the definition of pd_xxx methods
aoqi@0	147	#ifdef TARGET_ARCH_x86
aoqi@0	148	# include "registerMap_x86.hpp"
aoqi@0	149	#endif
aoqi@0	150	#ifdef TARGET_ARCH_sparc
aoqi@0	151	# include "registerMap_sparc.hpp"
aoqi@0	152	#endif
aoqi@0	153	#ifdef TARGET_ARCH_zero
aoqi@0	154	# include "registerMap_zero.hpp"
aoqi@0	155	#endif
aoqi@0	156	#ifdef TARGET_ARCH_arm
aoqi@0	157	# include "registerMap_arm.hpp"
aoqi@0	158	#endif
aoqi@0	159	#ifdef TARGET_ARCH_ppc
aoqi@0	160	# include "registerMap_ppc.hpp"
aoqi@0	161	#endif
aoqi@1	162	#ifdef TARGET_ARCH_mips
aoqi@1	163	# include "registerMap_mips.hpp"
aoqi@1	164	#endif
aoqi@0	165
aoqi@0	166	};
aoqi@0	167
aoqi@0	168	#endif // SHARE_VM_RUNTIME_REGISTERMAP_HPP