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src/share/vm/runtime/vmStructs.hpp@8b46b0196eb0 (annotated)

src/share/vm/runtime/vmStructs.hpp

Fri, 25 Jan 2013 10:04:08 -0500

author

zgu

date

Fri, 25 Jan 2013 10:04:08 -0500

changeset 4492

8b46b0196eb0

parent 4290

7c15faa95ce7

child 6876

710a3c8b516e

permissions

-rw-r--r--

8000692: Remove old KERNEL code
Summary: Removed depreciated kernel VM source code from hotspot VM
Reviewed-by: dholmes, acorn

duke@435	1	/*
zgu@4492	2	* Copyright (c) 2000, 2013, 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_RUNTIME_VMSTRUCTS_HPP
stefank@2314	26	#define SHARE_VM_RUNTIME_VMSTRUCTS_HPP
stefank@2314	27
stefank@2314	28	#include "utilities/debug.hpp"
stefank@2314	29	#ifdef COMPILER1
stefank@2314	30	#include "c1/c1_Runtime1.hpp"
stefank@2314	31	#endif
stefank@2314	32
duke@435	33	// This table encapsulates the debugging information required by the
duke@435	34	// serviceability agent in order to run. Specifically, we need to
duke@435	35	// understand the layout of certain C data structures (offsets, in
duke@435	36	// bytes, of their fields.)
duke@435	37	//
duke@435	38	// There are alternatives for the design of this mechanism, including
duke@435	39	// parsing platform-specific debugging symbols from a debug build into
duke@435	40	// a program database. While this current mechanism can be considered
duke@435	41	// to be a workaround for the inability to debug arbitrary C and C++
duke@435	42	// programs at the present time, it does have certain advantages.
duke@435	43	// First, it is platform-independent, which will vastly simplify the
duke@435	44	// initial bringup of the system both now and on future platforms.
duke@435	45	// Second, it is embedded within the VM, as opposed to being in a
duke@435	46	// separate program database; experience has shown that whenever
duke@435	47	// portions of a system are decoupled, version skew is problematic.
duke@435	48	// Third, generating a program database, for example for a product
duke@435	49	// build, would probably require two builds to be done: the desired
duke@435	50	// product build as well as an intermediary build with the PRODUCT
duke@435	51	// flag turned on but also compiled with -g, leading to a doubling of
duke@435	52	// the time required to get a serviceability agent-debuggable product
duke@435	53	// build. Fourth, and very significantly, this table probably
duke@435	54	// preserves more information about field types than stabs do; for
duke@435	55	// example, it preserves the fact that a field is a "jlong" rather
duke@435	56	// than transforming the type according to the typedef in jni_md.h,
duke@435	57	// which allows the Java-side code to identify "Java-sized" fields in
duke@435	58	// C++ data structures. If the symbol parsing mechanism was redone
duke@435	59	// using stabs, it might still be necessary to have a table somewhere
duke@435	60	// containing this information.
duke@435	61	//
duke@435	62	// Do not change the sizes or signedness of the integer values in
duke@435	63	// these data structures; they are fixed over in the serviceability
duke@435	64	// agent's Java code (for bootstrapping).
duke@435	65
duke@435	66	typedef struct {
duke@435	67	const char* typeName; // The type name containing the given field (example: "Klass")
duke@435	68	const char* fieldName; // The field name within the type (example: "_name")
coleenp@2497	69	const char* typeString; // Quoted name of the type of this field (example: "Symbol*";
duke@435	70	// parsed in Java to ensure type correctness
duke@435	71	int32_t isStatic; // Indicates whether following field is an offset or an address
duke@435	72	uint64_t offset; // Offset of field within structure; only used for nonstatic fields
duke@435	73	void* address; // Address of field; only used for static fields
duke@435	74	// ("offset" can not be reused because of apparent SparcWorks compiler bug
duke@435	75	// in generation of initializer data)
duke@435	76	} VMStructEntry;
duke@435	77
duke@435	78	typedef struct {
coleenp@4037	79	const char* typeName; // Type name (example: "Method")
duke@435	80	const char* superclassName; // Superclass name, or null if none (example: "oopDesc")
coleenp@4037	81	int32_t isOopType; // Does this type represent an oop typedef? (i.e., "Method*" or
coleenp@4037	82	// "Klass*", but NOT "Method")
duke@435	83	int32_t isIntegerType; // Does this type represent an integer type (of arbitrary size)?
duke@435	84	int32_t isUnsigned; // If so, is it unsigned?
duke@435	85	uint64_t size; // Size, in bytes, of the type
duke@435	86	} VMTypeEntry;
duke@435	87
duke@435	88	typedef struct {
duke@435	89	const char* name; // Name of constant (example: "_thread_in_native")
duke@435	90	int32_t value; // Value of constant
duke@435	91	} VMIntConstantEntry;
duke@435	92
duke@435	93	typedef struct {
duke@435	94	const char* name; // Name of constant (example: "_thread_in_native")
duke@435	95	uint64_t value; // Value of constant
duke@435	96	} VMLongConstantEntry;
duke@435	97
duke@435	98	// This class is a friend of most classes, to be able to access
duke@435	99	// private fields
duke@435	100	class VMStructs {
duke@435	101	public:
duke@435	102	// The last entry is identified over in the serviceability agent by
duke@435	103	// the fact that it has a NULL fieldName
duke@435	104	static VMStructEntry localHotSpotVMStructs[];
duke@435	105
duke@435	106	// The last entry is identified over in the serviceability agent by
duke@435	107	// the fact that it has a NULL typeName
duke@435	108	static VMTypeEntry localHotSpotVMTypes[];
duke@435	109
duke@435	110	// Table of integer constants required by the serviceability agent.
duke@435	111	// The last entry is identified over in the serviceability agent by
duke@435	112	// the fact that it has a NULL typeName
duke@435	113	static VMIntConstantEntry localHotSpotVMIntConstants[];
duke@435	114
duke@435	115	// Table of long constants required by the serviceability agent.
duke@435	116	// The last entry is identified over in the serviceability agent by
duke@435	117	// the fact that it has a NULL typeName
duke@435	118	static VMLongConstantEntry localHotSpotVMLongConstants[];
duke@435	119
duke@435	120	// This is used to run any checking code necessary for validation of
duke@435	121	// the data structure (debug build only)
duke@435	122	static void init();
duke@435	123
mikael@4290	124	#ifndef PRODUCT
mikael@4290	125	// Execute unit tests
mikael@4290	126	static void test();
mikael@4290	127	#endif
mikael@4290	128
duke@435	129	private:
duke@435	130	// Look up a type in localHotSpotVMTypes using strcmp() (debug build only).
duke@435	131	// Returns 1 if found, 0 if not.
duke@435	132	// debug_only(static int findType(const char* typeName);)
duke@435	133	static int findType(const char* typeName);
duke@435	134	};
stefank@2314	135
stefank@2314	136	#endif // SHARE_VM_RUNTIME_VMSTRUCTS_HPP