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src/share/vm/gc_implementation/shared/immutableSpace.hpp@7426d8d76305 (annotated)

src/share/vm/gc_implementation/shared/immutableSpace.hpp

Thu, 13 Feb 2014 17:44:39 +0100

author

stefank

date

Thu, 13 Feb 2014 17:44:39 +0100

changeset 6971

7426d8d76305

parent 4037

da91efe96a93

child 6876

710a3c8b516e

permissions

-rw-r--r--

8034761: Remove the do_code_roots parameter from process_strong_roots
Reviewed-by: tschatzl, mgerdin, jmasa

duke@435	1	/*
brutisso@3711	2	* Copyright (c) 2001, 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_GC_IMPLEMENTATION_SHARED_IMMUTABLESPACE_HPP
stefank@2314	26	#define SHARE_VM_GC_IMPLEMENTATION_SHARED_IMMUTABLESPACE_HPP
stefank@2314	27
stefank@2314	28	#include "memory/iterator.hpp"
stefank@2314	29
duke@435	30	// An ImmutableSpace is a viewport into a contiguous range
duke@435	31	// (or subrange) of previously allocated objects.
duke@435	32
duke@435	33	// Invariant: bottom() and end() are on page_size boundaries and
duke@435	34	// bottom() <= end()
duke@435	35
zgu@3900	36	class ImmutableSpace: public CHeapObj<mtGC> {
duke@435	37	friend class VMStructs;
duke@435	38	protected:
duke@435	39	HeapWord* _bottom;
duke@435	40	HeapWord* _end;
duke@435	41
duke@435	42	public:
duke@435	43	ImmutableSpace() { _bottom = NULL; _end = NULL; }
duke@435	44	HeapWord* bottom() const { return _bottom; }
duke@435	45	HeapWord* end() const { return _end; }
duke@435	46
duke@435	47	MemRegion region() const { return MemRegion(bottom(), end()); }
duke@435	48
duke@435	49	// Initialization
duke@435	50	void initialize(MemRegion mr);
duke@435	51
duke@435	52	bool contains(const void* p) const { return _bottom <= p && p < _end; }
duke@435	53
duke@435	54	// Size computations. Sizes are in bytes.
duke@435	55	size_t capacity_in_bytes() const { return capacity_in_words() * HeapWordSize; }
duke@435	56
duke@435	57	// Size computations. Sizes are in heapwords.
iveresov@808	58	size_t capacity_in_words() const { return pointer_delta(end(), bottom()); }
iveresov@808	59	virtual size_t capacity_in_words(Thread*) const { return capacity_in_words(); }
duke@435	60
duke@435	61	// Iteration.
coleenp@4037	62	virtual void oop_iterate(ExtendedOopClosure* cl);
duke@435	63	virtual void object_iterate(ObjectClosure* cl);
duke@435	64
duke@435	65	// Debugging
duke@435	66	virtual void print() const PRODUCT_RETURN;
duke@435	67	virtual void print_short() const PRODUCT_RETURN;
brutisso@3711	68	virtual void verify();
duke@435	69	};
stefank@2314	70
stefank@2314	71	#endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_IMMUTABLESPACE_HPP