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annotate src/share/vm/gc_implementation/shared/immutableSpace.hpp @ 13422:55dd6e77b399
8028624: [TESTBUG] compiler/intrinsics/mathexact/DecExactLTest executes DecExactITest
Reviewed-by: kvn, twisti
author | rbackman |
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date | Fri, 22 Nov 2013 15:26:37 +0100 |
parents | da91efe96a93 |
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0 | 1 /* |
6008 | 2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_IMMUTABLESPACE_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_IMMUTABLESPACE_HPP | |
27 | |
28 #include "memory/iterator.hpp" | |
29 | |
0 | 30 // An ImmutableSpace is a viewport into a contiguous range |
31 // (or subrange) of previously allocated objects. | |
32 | |
33 // Invariant: bottom() and end() are on page_size boundaries and | |
34 // bottom() <= end() | |
35 | |
6197 | 36 class ImmutableSpace: public CHeapObj<mtGC> { |
0 | 37 friend class VMStructs; |
38 protected: | |
39 HeapWord* _bottom; | |
40 HeapWord* _end; | |
41 | |
42 public: | |
43 ImmutableSpace() { _bottom = NULL; _end = NULL; } | |
44 HeapWord* bottom() const { return _bottom; } | |
45 HeapWord* end() const { return _end; } | |
46 | |
47 MemRegion region() const { return MemRegion(bottom(), end()); } | |
48 | |
49 // Initialization | |
50 void initialize(MemRegion mr); | |
51 | |
52 bool contains(const void* p) const { return _bottom <= p && p < _end; } | |
53 | |
54 // Size computations. Sizes are in bytes. | |
55 size_t capacity_in_bytes() const { return capacity_in_words() * HeapWordSize; } | |
56 | |
57 // Size computations. Sizes are in heapwords. | |
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58 size_t capacity_in_words() const { return pointer_delta(end(), bottom()); } |
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59 virtual size_t capacity_in_words(Thread*) const { return capacity_in_words(); } |
0 | 60 |
61 // Iteration. | |
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62 virtual void oop_iterate(ExtendedOopClosure* cl); |
0 | 63 virtual void object_iterate(ObjectClosure* cl); |
64 | |
65 // Debugging | |
66 virtual void print() const PRODUCT_RETURN; | |
67 virtual void print_short() const PRODUCT_RETURN; | |
6008 | 68 virtual void verify(); |
0 | 69 }; |
1972 | 70 |
71 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_IMMUTABLESPACE_HPP |