Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/shared/immutableSpace.hpp @ 263:12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
Summary: Maintain a high water mark for the allocations in a space and mangle only up to that high water mark.
Reviewed-by: ysr, apetrusenko
author | jmasa |
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date | Wed, 09 Jul 2008 15:08:55 -0700 |
parents | d1635bf93939 |
children | d1605aabd0a1 |
rev | line source |
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0 | 1 /* |
2 * Copyright 2001-2006 Sun Microsystems, Inc. All Rights Reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 // An ImmutableSpace is a viewport into a contiguous range | |
26 // (or subrange) of previously allocated objects. | |
27 | |
28 // Invariant: bottom() and end() are on page_size boundaries and | |
29 // bottom() <= end() | |
30 | |
31 class ImmutableSpace: public CHeapObj { | |
32 friend class VMStructs; | |
33 protected: | |
34 HeapWord* _bottom; | |
35 HeapWord* _end; | |
36 | |
37 public: | |
38 ImmutableSpace() { _bottom = NULL; _end = NULL; } | |
39 HeapWord* bottom() const { return _bottom; } | |
40 HeapWord* end() const { return _end; } | |
41 | |
42 MemRegion region() const { return MemRegion(bottom(), end()); } | |
43 | |
44 // Initialization | |
45 void initialize(MemRegion mr); | |
46 | |
47 bool contains(const void* p) const { return _bottom <= p && p < _end; } | |
48 | |
49 // Size computations. Sizes are in bytes. | |
50 size_t capacity_in_bytes() const { return capacity_in_words() * HeapWordSize; } | |
51 | |
52 // Size computations. Sizes are in heapwords. | |
53 size_t capacity_in_words() const { return pointer_delta(end(), bottom()); } | |
54 | |
55 // Iteration. | |
56 virtual void oop_iterate(OopClosure* cl); | |
57 virtual void object_iterate(ObjectClosure* cl); | |
58 | |
59 // Debugging | |
60 virtual void print() const PRODUCT_RETURN; | |
61 virtual void print_short() const PRODUCT_RETURN; | |
190
d1635bf93939
6711930: NUMA allocator: ParOld can create a hole less than minimal object size in the lgrp chunk
iveresov
parents:
0
diff
changeset
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62 virtual void verify(bool allow_dirty); |
0 | 63 }; |