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src/share/vm/oops/constantPoolKlass.hpp@ba764ed4b6f2 (annotated)

src/share/vm/oops/constantPoolKlass.hpp

Sun, 13 Apr 2008 17:43:42 -0400

author

coleenp

date

Sun, 13 Apr 2008 17:43:42 -0400

changeset 548

ba764ed4b6f2

parent 435

a61af66fc99e

child 631

d1605aabd0a1

permissions

-rw-r--r--

6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv
Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold

duke@435	1	/*
duke@435	2	* Copyright 1997-2006 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 constantPoolKlass is the klass of a constantPoolOop
duke@435	26
coleenp@548	27	class constantPoolKlass : public Klass {
coleenp@548	28	juint _alloc_size; // allocation profiling support
duke@435	29	public:
duke@435	30	// Dispatched klass operations
duke@435	31	bool oop_is_constantPool() const { return true; }
duke@435	32	int oop_size(oop obj) const;
duke@435	33	int klass_oop_size() const { return object_size(); }
duke@435	34
duke@435	35	// Allocation
duke@435	36	DEFINE_ALLOCATE_PERMANENT(constantPoolKlass);
duke@435	37	constantPoolOop allocate(int length, TRAPS);
duke@435	38	static klassOop create_klass(TRAPS);
duke@435	39
duke@435	40	// Casting from klassOop
duke@435	41	static constantPoolKlass* cast(klassOop k) {
duke@435	42	assert(k->klass_part()->oop_is_constantPool(), "cast to constantPoolKlass");
duke@435	43	return (constantPoolKlass*) k->klass_part();
duke@435	44	}
duke@435	45
duke@435	46	// Sizing
duke@435	47	static int header_size() { return oopDesc::header_size() + sizeof(constantPoolKlass)/HeapWordSize; }
coleenp@548	48	int object_size() const { return align_object_size(header_size()); }
duke@435	49
duke@435	50	// Garbage collection
duke@435	51	void oop_follow_contents(oop obj);
duke@435	52	int oop_adjust_pointers(oop obj);
duke@435	53
duke@435	54	// Parallel Scavenge and Parallel Old
duke@435	55	PARALLEL_GC_DECLS
duke@435	56
duke@435	57	// Iterators
duke@435	58	int oop_oop_iterate(oop obj, OopClosure* blk);
duke@435	59	int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr);
duke@435	60
coleenp@548	61	// Allocation profiling support
coleenp@548	62	// no idea why this is pure virtual and not in Klass ???
coleenp@548	63	juint alloc_size() const { return _alloc_size; }
coleenp@548	64	void set_alloc_size(juint n) { _alloc_size = n; }
coleenp@548	65
duke@435	66	#ifndef PRODUCT
duke@435	67	public:
duke@435	68	// Printing
duke@435	69	void oop_print_on(oop obj, outputStream* st);
duke@435	70	#endif
duke@435	71
duke@435	72	public:
duke@435	73	// Verification
duke@435	74	const char* internal_name() const;
duke@435	75	void oop_verify_on(oop obj, outputStream* st);
duke@435	76	// tells whether obj is partially constructed (gc during class loading)
duke@435	77	bool oop_partially_loaded(oop obj) const;
duke@435	78	void oop_set_partially_loaded(oop obj);
duke@435	79	#ifndef PRODUCT
duke@435	80	// Compile the world support
duke@435	81	static void preload_and_initialize_all_classes(oop constant_pool, TRAPS);
duke@435	82	#endif
duke@435	83	};