• file
• revisions
• annotate
• diff
• comparison
• raw

src/share/vm/gc_implementation/shared/immutableSpace.hpp@c6c601a0f2d6 (annotated)

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

Mon, 02 Mar 2009 16:37:04 -0800

author

ysr

date

Mon, 02 Mar 2009 16:37:04 -0800

changeset 1050

c6c601a0f2d6

parent 808

06df86c2ec37

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
Summary: Call newly created CollectedHeap::dump_{pre,post}_full_gc before and after every stop-world full collection cycle on GenCollectedHeap and ParallelScavengeHeap. (Support for G1CollectedHeap forthcoming under CR 6810861.) Small modifications to existing heap dumping and class histogram implementation, especially to allow multiple on-the-fly histos/dumps by the VM thread during a single safepoint.
Reviewed-by: jmasa, alanb, mchung

duke@435	1	/*
xdono@631	2	* Copyright 2001-2008 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	// An ImmutableSpace is a viewport into a contiguous range
duke@435	26	// (or subrange) of previously allocated objects.
duke@435	27
duke@435	28	// Invariant: bottom() and end() are on page_size boundaries and
duke@435	29	// bottom() <= end()
duke@435	30
duke@435	31	class ImmutableSpace: public CHeapObj {
duke@435	32	friend class VMStructs;
duke@435	33	protected:
duke@435	34	HeapWord* _bottom;
duke@435	35	HeapWord* _end;
duke@435	36
duke@435	37	public:
duke@435	38	ImmutableSpace() { _bottom = NULL; _end = NULL; }
duke@435	39	HeapWord* bottom() const { return _bottom; }
duke@435	40	HeapWord* end() const { return _end; }
duke@435	41
duke@435	42	MemRegion region() const { return MemRegion(bottom(), end()); }
duke@435	43
duke@435	44	// Initialization
duke@435	45	void initialize(MemRegion mr);
duke@435	46
duke@435	47	bool contains(const void* p) const { return _bottom <= p && p < _end; }
duke@435	48
duke@435	49	// Size computations. Sizes are in bytes.
duke@435	50	size_t capacity_in_bytes() const { return capacity_in_words() * HeapWordSize; }
duke@435	51
duke@435	52	// Size computations. Sizes are in heapwords.
iveresov@808	53	size_t capacity_in_words() const { return pointer_delta(end(), bottom()); }
iveresov@808	54	virtual size_t capacity_in_words(Thread*) const { return capacity_in_words(); }
duke@435	55
duke@435	56	// Iteration.
duke@435	57	virtual void oop_iterate(OopClosure* cl);
duke@435	58	virtual void object_iterate(ObjectClosure* cl);
duke@435	59
duke@435	60	// Debugging
duke@435	61	virtual void print() const PRODUCT_RETURN;
duke@435	62	virtual void print_short() const PRODUCT_RETURN;
iveresov@625	63	virtual void verify(bool allow_dirty);
duke@435	64	};