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src/share/vm/ci/ciKlass.hpp@f90c822e73f8 (annotated)

src/share/vm/ci/ciKlass.hpp

Wed, 27 Apr 2016 01:25:04 +0800

author

aoqi

date

Wed, 27 Apr 2016 01:25:04 +0800

changeset 0

f90c822e73f8

child 6876

710a3c8b516e

permissions

-rw-r--r--

Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 1999, 2013, 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@0	25	#ifndef SHARE_VM_CI_CIKLASS_HPP
aoqi@0	26	#define SHARE_VM_CI_CIKLASS_HPP
aoqi@0	27
aoqi@0	28	#include "ci/ciType.hpp"
aoqi@0	29
aoqi@0	30	// ciKlass
aoqi@0	31	//
aoqi@0	32	// This class and its subclasses represent Klass*s in the
aoqi@0	33	// HotSpot virtual machine. In the vm, each Klass* contains an
aoqi@0	34	// embedded Klass object. ciKlass is subclassed to explicitly
aoqi@0	35	// represent the kind of Klass embedded in the Klass*. For
aoqi@0	36	// example, a Klass* with an embedded ObjArrayKlass object is
aoqi@0	37	// represented in the ciObject hierarchy by the class
aoqi@0	38	// ciObjArrayKlass.
aoqi@0	39	class ciKlass : public ciType {
aoqi@0	40	CI_PACKAGE_ACCESS
aoqi@0	41	friend class ciEnv;
aoqi@0	42	friend class ciField;
aoqi@0	43	friend class ciMethod;
aoqi@0	44	friend class ciMethodData;
aoqi@0	45	friend class ciObjArrayKlass;
aoqi@0	46
aoqi@0	47	private:
aoqi@0	48	ciSymbol* _name;
aoqi@0	49	jint _layout_helper;
aoqi@0	50
aoqi@0	51	protected:
aoqi@0	52	ciKlass(KlassHandle k_h, ciSymbol* name);
aoqi@0	53	ciKlass(ciSymbol* name, BasicType bt);
aoqi@0	54
aoqi@0	55	Klass* get_Klass() const {
aoqi@0	56	Klass* k = (Klass*)_metadata;
aoqi@0	57	assert(k != NULL, "illegal use of unloaded klass");
aoqi@0	58	return k;
aoqi@0	59	}
aoqi@0	60
aoqi@0	61	// Certain subklasses have an associated class loader.
aoqi@0	62	virtual oop loader() { return NULL; }
aoqi@0	63	virtual jobject loader_handle() { return NULL; }
aoqi@0	64
aoqi@0	65	virtual oop protection_domain() { return NULL; }
aoqi@0	66	virtual jobject protection_domain_handle() { return NULL; }
aoqi@0	67
aoqi@0	68	const char* type_string() { return "ciKlass"; }
aoqi@0	69
aoqi@0	70	void print_impl(outputStream* st);
aoqi@0	71
aoqi@0	72	public:
aoqi@0	73	ciKlass(KlassHandle k_h);
aoqi@0	74
aoqi@0	75	// What is the name of this klass?
aoqi@0	76	ciSymbol* name() const { return _name; }
aoqi@0	77
aoqi@0	78	// What is its layout helper value?
aoqi@0	79	jint layout_helper() { return _layout_helper; }
aoqi@0	80
aoqi@0	81	bool is_subtype_of(ciKlass* klass);
aoqi@0	82	bool is_subclass_of(ciKlass* klass);
aoqi@0	83	juint super_depth();
aoqi@0	84	juint super_check_offset();
aoqi@0	85	ciKlass* super_of_depth(juint i);
aoqi@0	86	bool can_be_primary_super();
aoqi@0	87	static juint primary_super_limit() { return Klass::primary_super_limit(); }
aoqi@0	88
aoqi@0	89	// Is this ciObject the ciInstanceKlass representing java.lang.Object()?
aoqi@0	90	virtual bool is_java_lang_Object() const { return false; }
aoqi@0	91
aoqi@0	92	// Get the shared parent of two klasses.
aoqi@0	93	ciKlass* least_common_ancestor(ciKlass* k);
aoqi@0	94
aoqi@0	95	virtual bool is_interface() {
aoqi@0	96	return false;
aoqi@0	97	}
aoqi@0	98
aoqi@0	99	virtual bool is_abstract() {
aoqi@0	100	return false;
aoqi@0	101	}
aoqi@0	102
aoqi@0	103	// Does this type (array, class, interface) have no subtypes?
aoqi@0	104	virtual bool is_leaf_type() {
aoqi@0	105	return false;
aoqi@0	106	}
aoqi@0	107
aoqi@0	108	// Attempt to get a klass using this ciKlass's loader.
aoqi@0	109	ciKlass* find_klass(ciSymbol* klass_name);
aoqi@0	110	// Note: To find a class from its name string, use ciSymbol::make,
aoqi@0	111	// but consider adding to vmSymbols.hpp instead.
aoqi@0	112
aoqi@0	113	// Get the instance of java.lang.Class corresponding to this klass.
aoqi@0	114	ciInstance* java_mirror();
aoqi@0	115
aoqi@0	116	// Fetch Klass::modifier_flags.
aoqi@0	117	jint modifier_flags();
aoqi@0	118
aoqi@0	119	// Fetch Klass::access_flags.
aoqi@0	120	jint access_flags();
aoqi@0	121
aoqi@0	122	// What kind of ciObject is this?
aoqi@0	123	bool is_klass() const { return true; }
aoqi@0	124
aoqi@0	125	virtual ciKlass* exact_klass() = 0;
aoqi@0	126
aoqi@0	127	void print_name_on(outputStream* st);
aoqi@0	128	};
aoqi@0	129
aoqi@0	130	#endif // SHARE_VM_CI_CIKLASS_HPP