Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/shared/spaceDecorator.hpp @ 1941:79d04223b8a5
Added caching for resolved types and resolved fields.
This is crucial, because the local load elimination will lead to wrong results, if field equality (of two RiField objects with the same object and the same RiType) is not given. The caching makes sure that the default equals implementation is sufficient.
author | Thomas Wuerthinger <wuerthinger@ssw.jku.at> |
---|---|
date | Tue, 28 Dec 2010 18:33:26 +0100 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
---|---|
263
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
1 /* |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1547
diff
changeset
|
2 * Copyright (c) 2002, 2008, Oracle and/or its affiliates. All rights reserved. |
263
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
4 * |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
5 * This code is free software; you can redistribute it and/or modify it |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
6 * under the terms of the GNU General Public License version 2 only, as |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
7 * published by the Free Software Foundation. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
8 * |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
9 * This code is distributed in the hope that it will be useful, but WITHOUT |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
12 * version 2 for more details (a copy is included in the LICENSE file that |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
13 * accompanied this code). |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
14 * |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
15 * You should have received a copy of the GNU General Public License version |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
16 * 2 along with this work; if not, write to the Free Software Foundation, |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
18 * |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1547
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1547
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1547
diff
changeset
|
21 * questions. |
263
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
22 * |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
23 */ |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
24 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
25 class SpaceDecorator: public AllStatic { |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
26 public: |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
27 // Initialization flags. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
28 static const bool Clear = true; |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
29 static const bool DontClear = false; |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
30 static const bool Mangle = true; |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
31 static const bool DontMangle = false; |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
32 }; |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
33 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
34 // Functionality for use with class Space and class MutableSpace. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
35 // The approach taken with the mangling is to mangle all |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
36 // the space initially and then to mangle areas that have |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
37 // been allocated since the last collection. Mangling is |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
38 // done in the context of a generation and in the context |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
39 // of a space. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
40 // The space in a generation is mangled when it is first |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
41 // initialized and when the generation grows. The spaces |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
42 // are not necessarily up-to-date when this mangling occurs |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
43 // and the method mangle_region() is used. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
44 // After allocations have been done in a space, the space generally |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
45 // need to be remangled. Remangling is only done on the |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
46 // recently allocated regions in the space. Typically, that is |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
47 // the region between the new top and the top just before a |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
48 // garbage collection. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
49 // An exception to the usual mangling in a space is done when the |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
50 // space is used for an extraordinary purpose. Specifically, when |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
51 // to-space is used as scratch space for a mark-sweep-compact |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
52 // collection. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
53 // Spaces are mangled after a collection. If the generation |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
54 // grows after a collection, the added space is mangled as part of |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
55 // the growth of the generation. No additional mangling is needed when the |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
56 // spaces are resized after an expansion. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
57 // The class SpaceMangler keeps a pointer to the top of the allocated |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
58 // area and provides the methods for doing the piece meal mangling. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
59 // Methods for doing sparces and full checking of the mangling are |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
60 // included. The full checking is done if DEBUG_MANGLING is defined. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
61 // GenSpaceMangler is used with the GenCollectedHeap collectors and |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
62 // MutableSpaceMangler is used with the ParallelScavengeHeap collectors. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
63 // These subclasses abstract the differences in the types of spaces used |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
64 // by each heap. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
65 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
66 class SpaceMangler: public CHeapObj { |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
67 friend class VMStructs; |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
68 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
69 // High water mark for allocations. Typically, the space above |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
70 // this point have been mangle previously and don't need to be |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
71 // touched again. Space belows this point has been allocated |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
72 // and remangling is needed between the current top and this |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
73 // high water mark. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
74 HeapWord* _top_for_allocations; |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
75 HeapWord* top_for_allocations() { return _top_for_allocations; } |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
76 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
77 public: |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
78 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
79 // Setting _top_for_allocations to NULL at initialization |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
80 // makes it always below top so that mangling done as part |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
81 // of the initialize() call of a space does nothing (as it |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
82 // should since the mangling is done as part of the constructor |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
83 // for the space. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
84 SpaceMangler() : _top_for_allocations(NULL) {} |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
85 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
86 // Methods for top and end that delegate to the specific |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
87 // space type. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
88 virtual HeapWord* top() const = 0; |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
89 virtual HeapWord* end() const = 0; |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
90 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
91 // Return true if q matches the mangled pattern. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
92 static bool is_mangled(HeapWord* q) PRODUCT_RETURN0; |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
93 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
94 // Used to save the an address in a space for later use during mangling. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
95 void set_top_for_allocations(HeapWord* v); |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
96 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
97 // Overwrites the unused portion of this space. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
98 // Mangle only the region not previously mangled [top, top_previously_mangled) |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
99 void mangle_unused_area(); |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
100 // Mangle all the unused region [top, end) |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
101 void mangle_unused_area_complete(); |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
102 // Do some sparse checking on the area that should have been mangled. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
103 void check_mangled_unused_area(HeapWord* limit) PRODUCT_RETURN; |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
104 // Do a complete check of the area that should be mangled. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
105 void check_mangled_unused_area_complete() PRODUCT_RETURN; |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
106 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
107 // Mangle the MemRegion. This is a non-space specific mangler. It |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
108 // is used during the initial mangling of a space before the space |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
109 // is fully constructed. Also is used when a generation is expanded |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
110 // and possibly before the spaces have been reshaped to to the new |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
111 // size of the generation. |
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
337
diff
changeset
|
112 static void mangle_region(MemRegion mr) PRODUCT_RETURN; |
263
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
113 }; |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
114 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
115 class ContiguousSpace; |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
116 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
117 // For use with GenCollectedHeap's |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
118 class GenSpaceMangler: public SpaceMangler { |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
119 ContiguousSpace* _sp; |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
120 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
121 ContiguousSpace* sp() { return _sp; } |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
122 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
123 HeapWord* top() const { return _sp->top(); } |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
124 HeapWord* end() const { return _sp->end(); } |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
125 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
126 public: |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
127 GenSpaceMangler(ContiguousSpace* sp) : SpaceMangler(), _sp(sp) {} |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
128 }; |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
129 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
130 // For use with ParallelScavengeHeap's. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
131 class MutableSpaceMangler: public SpaceMangler { |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
132 MutableSpace* _sp; |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
133 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
134 MutableSpace* sp() { return _sp; } |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
135 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
136 HeapWord* top() const { return _sp->top(); } |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
137 HeapWord* end() const { return _sp->end(); } |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
138 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
139 public: |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
140 MutableSpaceMangler(MutableSpace* sp) : SpaceMangler(), _sp(sp) {} |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
diff
changeset
|
141 }; |