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src/share/vm/ci/ciKlass.hpp@b4776199210f (annotated)

src/share/vm/ci/ciKlass.hpp

Mon, 26 Apr 2010 23:59:45 -0700

author

never

date

Mon, 26 Apr 2010 23:59:45 -0700

changeset 1832

b4776199210f

parent 1573

dd57230ba8fe

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6943485: JVMTI always on capabilities change code generation too much
Reviewed-by: twisti, dcubed

duke@435	1	/*
twisti@1573	2	* Copyright 1999-2009 Sun Microsystems, Inc. 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	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	// ciKlass
duke@435	26	//
duke@435	27	// This class and its subclasses represent klassOops in the
duke@435	28	// HotSpot virtual machine. In the vm, each klassOop contains an
duke@435	29	// embedded Klass object. ciKlass is subclassed to explicitly
duke@435	30	// represent the kind of Klass embedded in the klassOop. For
duke@435	31	// example, a klassOop with an embedded objArrayKlass object is
duke@435	32	// represented in the ciObject hierarchy by the class
duke@435	33	// ciObjArrayKlass.
duke@435	34	class ciKlass : public ciType {
duke@435	35	CI_PACKAGE_ACCESS
duke@435	36	friend class ciEnv;
duke@435	37	friend class ciField;
duke@435	38	friend class ciMethod;
duke@435	39	friend class ciObjArrayKlass;
duke@435	40
duke@435	41	private:
duke@435	42	ciSymbol* _name;
duke@435	43	jint _layout_helper;
duke@435	44
duke@435	45	protected:
duke@435	46	ciKlass(KlassHandle k_h, ciSymbol* name);
duke@435	47	ciKlass(ciSymbol* name, ciKlass* klass);
duke@435	48
duke@435	49	klassOop get_klassOop() const {
duke@435	50	klassOop k = (klassOop)get_oop();
duke@435	51	assert(k != NULL, "illegal use of unloaded klass");
duke@435	52	return k;
duke@435	53	}
duke@435	54
duke@435	55	Klass* get_Klass() const { return get_klassOop()->klass_part(); }
duke@435	56
duke@435	57	// Certain subklasses have an associated class loader.
duke@435	58	virtual oop loader() { return NULL; }
duke@435	59	virtual jobject loader_handle() { return NULL; }
duke@435	60
duke@435	61	virtual oop protection_domain() { return NULL; }
duke@435	62	virtual jobject protection_domain_handle() { return NULL; }
duke@435	63
duke@435	64	const char* type_string() { return "ciKlass"; }
duke@435	65
duke@435	66	void print_impl(outputStream* st);
duke@435	67
duke@435	68	public:
duke@435	69	ciKlass(KlassHandle k_h);
duke@435	70
duke@435	71	// What is the name of this klass?
twisti@1573	72	ciSymbol* name() const { return _name; }
duke@435	73
duke@435	74	// What is its layout helper value?
duke@435	75	jint layout_helper() { return _layout_helper; }
duke@435	76
duke@435	77	bool is_subtype_of(ciKlass* klass);
duke@435	78	bool is_subclass_of(ciKlass* klass);
duke@435	79	juint super_depth();
duke@435	80	juint super_check_offset();
duke@435	81	ciKlass* super_of_depth(juint i);
duke@435	82	bool can_be_primary_super();
duke@435	83	static juint primary_super_limit() { return Klass::primary_super_limit(); }
duke@435	84
duke@435	85	// Get the shared parent of two klasses.
duke@435	86	ciKlass* least_common_ancestor(ciKlass* k);
duke@435	87
duke@435	88	virtual bool is_interface() {
duke@435	89	return false;
duke@435	90	}
duke@435	91
duke@435	92	virtual bool is_abstract() {
duke@435	93	return false;
duke@435	94	}
duke@435	95
duke@435	96	// Does this type (array, class, interface) have no subtypes?
duke@435	97	virtual bool is_leaf_type() {
duke@435	98	return false;
duke@435	99	}
duke@435	100
duke@435	101	// Attempt to get a klass using this ciKlass's loader.
duke@435	102	ciKlass* find_klass(ciSymbol* klass_name);
duke@435	103	// Note: To find a class from its name string, use ciSymbol::make,
duke@435	104	// but consider adding to vmSymbols.hpp instead.
duke@435	105
duke@435	106	// Get the instance of java.lang.Class corresponding to this klass.
duke@435	107	ciInstance* java_mirror();
duke@435	108
duke@435	109	// Fetch Klass::modifier_flags.
duke@435	110	jint modifier_flags();
duke@435	111
duke@435	112	// Fetch Klass::access_flags.
duke@435	113	jint access_flags();
duke@435	114
duke@435	115	// What kind of ciObject is this?
duke@435	116	bool is_klass() { return true; }
duke@435	117
duke@435	118	void print_name_on(outputStream* st);
duke@435	119	};