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src/share/vm/ci/ciKlass.hpp@b2ee5dc63353 (annotated)

src/share/vm/ci/ciKlass.hpp

Wed, 23 Oct 2013 12:40:23 +0200

author

roland

date

Wed, 23 Oct 2013 12:40:23 +0200

changeset 5991

b2ee5dc63353

parent 5914

d13d7aba8c12

child 6198

55fb97c4c58d

permissions

-rw-r--r--

8024070: C2 needs some form of type speculation
Summary: record unused type profile information with type system, propagate and use it.
Reviewed-by: kvn, twisti

duke@435	1	/*
coleenp@4037	2	* Copyright (c) 1999, 2012, 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_CI_CIKLASS_HPP
stefank@2314	26	#define SHARE_VM_CI_CIKLASS_HPP
stefank@2314	27
stefank@2314	28	#include "ci/ciType.hpp"
stefank@2314	29
duke@435	30	// ciKlass
duke@435	31	//
coleenp@4037	32	// This class and its subclasses represent Klass*s in the
coleenp@4037	33	// HotSpot virtual machine. In the vm, each Klass* contains an
duke@435	34	// embedded Klass object. ciKlass is subclassed to explicitly
coleenp@4037	35	// represent the kind of Klass embedded in the Klass*. For
coleenp@4142	36	// example, a Klass* with an embedded ObjArrayKlass object is
duke@435	37	// represented in the ciObject hierarchy by the class
duke@435	38	// ciObjArrayKlass.
duke@435	39	class ciKlass : public ciType {
duke@435	40	CI_PACKAGE_ACCESS
duke@435	41	friend class ciEnv;
duke@435	42	friend class ciField;
duke@435	43	friend class ciMethod;
roland@5914	44	friend class ciMethodData;
duke@435	45	friend class ciObjArrayKlass;
duke@435	46
duke@435	47	private:
duke@435	48	ciSymbol* _name;
duke@435	49	jint _layout_helper;
duke@435	50
duke@435	51	protected:
duke@435	52	ciKlass(KlassHandle k_h, ciSymbol* name);
coleenp@4037	53	ciKlass(ciSymbol* name, BasicType bt);
duke@435	54
coleenp@4037	55	Klass* get_Klass() const {
coleenp@4037	56	Klass* k = (Klass*)_metadata;
duke@435	57	assert(k != NULL, "illegal use of unloaded klass");
duke@435	58	return k;
duke@435	59	}
duke@435	60
duke@435	61	// Certain subklasses have an associated class loader.
duke@435	62	virtual oop loader() { return NULL; }
duke@435	63	virtual jobject loader_handle() { return NULL; }
duke@435	64
duke@435	65	virtual oop protection_domain() { return NULL; }
duke@435	66	virtual jobject protection_domain_handle() { return NULL; }
duke@435	67
duke@435	68	const char* type_string() { return "ciKlass"; }
duke@435	69
duke@435	70	void print_impl(outputStream* st);
duke@435	71
duke@435	72	public:
duke@435	73	ciKlass(KlassHandle k_h);
duke@435	74
duke@435	75	// What is the name of this klass?
twisti@1573	76	ciSymbol* name() const { return _name; }
duke@435	77
duke@435	78	// What is its layout helper value?
duke@435	79	jint layout_helper() { return _layout_helper; }
duke@435	80
duke@435	81	bool is_subtype_of(ciKlass* klass);
duke@435	82	bool is_subclass_of(ciKlass* klass);
duke@435	83	juint super_depth();
duke@435	84	juint super_check_offset();
duke@435	85	ciKlass* super_of_depth(juint i);
duke@435	86	bool can_be_primary_super();
duke@435	87	static juint primary_super_limit() { return Klass::primary_super_limit(); }
duke@435	88
coleenp@4037	89	// Is this ciObject the ciInstanceKlass representing java.lang.Object()?
coleenp@4037	90	virtual bool is_java_lang_Object() const { return false; }
coleenp@4037	91
duke@435	92	// Get the shared parent of two klasses.
duke@435	93	ciKlass* least_common_ancestor(ciKlass* k);
duke@435	94
duke@435	95	virtual bool is_interface() {
duke@435	96	return false;
duke@435	97	}
duke@435	98
duke@435	99	virtual bool is_abstract() {
duke@435	100	return false;
duke@435	101	}
duke@435	102
duke@435	103	// Does this type (array, class, interface) have no subtypes?
duke@435	104	virtual bool is_leaf_type() {
duke@435	105	return false;
duke@435	106	}
duke@435	107
duke@435	108	// Attempt to get a klass using this ciKlass's loader.
duke@435	109	ciKlass* find_klass(ciSymbol* klass_name);
duke@435	110	// Note: To find a class from its name string, use ciSymbol::make,
duke@435	111	// but consider adding to vmSymbols.hpp instead.
duke@435	112
duke@435	113	// Get the instance of java.lang.Class corresponding to this klass.
duke@435	114	ciInstance* java_mirror();
duke@435	115
duke@435	116	// Fetch Klass::modifier_flags.
duke@435	117	jint modifier_flags();
duke@435	118
duke@435	119	// Fetch Klass::access_flags.
duke@435	120	jint access_flags();
duke@435	121
duke@435	122	// What kind of ciObject is this?
coleenp@4037	123	bool is_klass() const { return true; }
duke@435	124
roland@5914	125	virtual ciKlass* exact_klass() = 0;
roland@5914	126
duke@435	127	void print_name_on(outputStream* st);
duke@435	128	};
stefank@2314	129
stefank@2314	130	#endif // SHARE_VM_CI_CIKLASS_HPP