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src/share/vm/runtime/fieldDescriptor.hpp@c6ff24ceec1c (annotated)

src/share/vm/runtime/fieldDescriptor.hpp

Thu, 10 Apr 2008 15:49:16 -0400

author

sbohne

date

Thu, 10 Apr 2008 15:49:16 -0400

changeset 528

c6ff24ceec1c

parent 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6686407: Fix for 6666698 broke -XX:BiasedLockingStartupDelay=0
Summary: Stack allocated VM_EnableBiasedLocking op must be marked as such
Reviewed-by: xlu, acorn, never, dholmes

duke@435	1	/*
duke@435	2	* Copyright 1997-2005 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	// A fieldDescriptor describes the attributes of a single field (instance or class variable).
duke@435	26	// It needs the class constant pool to work (because it only holds indices into the pool
duke@435	27	// rather than the actual info).
duke@435	28
duke@435	29	class fieldDescriptor VALUE_OBJ_CLASS_SPEC {
duke@435	30	private:
duke@435	31	AccessFlags _access_flags;
duke@435	32	int _name_index;
duke@435	33	int _signature_index;
duke@435	34	int _initial_value_index;
duke@435	35	int _offset;
duke@435	36	int _generic_signature_index;
duke@435	37	int _index; // index into fields() array
duke@435	38	constantPoolHandle _cp;
duke@435	39
duke@435	40	public:
duke@435	41	symbolOop name() const { return _cp->symbol_at(_name_index); }
duke@435	42	symbolOop signature() const { return _cp->symbol_at(_signature_index); }
duke@435	43	klassOop field_holder() const { return _cp->pool_holder(); }
duke@435	44	constantPoolOop constants() const { return _cp(); }
duke@435	45	AccessFlags access_flags() const { return _access_flags; }
duke@435	46	oop loader() const;
duke@435	47	// Offset (in words) of field from start of instanceOop / klassOop
duke@435	48	int offset() const { return _offset; }
duke@435	49	symbolOop generic_signature() const { return (_generic_signature_index > 0 ? _cp->symbol_at(_generic_signature_index) : (symbolOop)NULL); }
duke@435	50	int index() const { return _index; }
duke@435	51	typeArrayOop annotations() const;
duke@435	52
duke@435	53	// Initial field value
duke@435	54	bool has_initial_value() const { return _initial_value_index != 0; }
duke@435	55	constantTag initial_value_tag() const; // The tag will return true on one of is_int(), is_long(), is_single(), is_double()
duke@435	56	jint int_initial_value() const;
duke@435	57	jlong long_initial_value() const;
duke@435	58	jfloat float_initial_value() const;
duke@435	59	jdouble double_initial_value() const;
duke@435	60	oop string_initial_value(TRAPS) const;
duke@435	61
duke@435	62	// Field signature type
duke@435	63	BasicType field_type() const { return FieldType::basic_type(signature()); }
duke@435	64
duke@435	65	// Access flags
duke@435	66	bool is_public() const { return _access_flags.is_public(); }
duke@435	67	bool is_private() const { return _access_flags.is_private(); }
duke@435	68	bool is_protected() const { return _access_flags.is_protected(); }
duke@435	69	bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); }
duke@435	70
duke@435	71	bool is_static() const { return _access_flags.is_static(); }
duke@435	72	bool is_final() const { return _access_flags.is_final(); }
duke@435	73	bool is_volatile() const { return _access_flags.is_volatile(); }
duke@435	74	bool is_transient() const { return _access_flags.is_transient(); }
duke@435	75
duke@435	76	bool is_synthetic() const { return _access_flags.is_synthetic(); }
duke@435	77
duke@435	78	bool is_field_access_watched() const { return _access_flags.is_field_access_watched(); }
duke@435	79	bool is_field_modification_watched() const
duke@435	80	{ return _access_flags.is_field_modification_watched(); }
duke@435	81	void set_is_field_access_watched(const bool value)
duke@435	82	{ _access_flags.set_is_field_access_watched(value); }
duke@435	83	void set_is_field_modification_watched(const bool value)
duke@435	84	{ _access_flags.set_is_field_modification_watched(value); }
duke@435	85
duke@435	86	// Initialization
duke@435	87	void initialize(klassOop k, int index);
duke@435	88
duke@435	89	// Print
duke@435	90	void print_on(outputStream* st) const PRODUCT_RETURN;
duke@435	91	void print_on_for(outputStream* st, oop obj) PRODUCT_RETURN;
duke@435	92	};