Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/shared/mutableSpace.hpp @ 520:52a431267315
6791168: Fix invalid code in bytecodeInterpreter that can cause gcc ICE
Summary: Fix compilation errors from latest gcc in CC_INTERP including offending missing void* cast.
Reviewed-by: xlu
author | coleenp |
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date | Tue, 13 Jan 2009 14:41:44 -0500 |
parents | 850fdf70db2b |
children | 4e400c36026f |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 2001-2008 Sun Microsystems, Inc. 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 * | |
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 // A MutableSpace is a subtype of ImmutableSpace that supports the | |
26 // concept of allocation. This includes the concepts that a space may | |
27 // be only partially full, and the querry methods that go with such | |
28 // an assumption. | |
29 // | |
30 // Invariant: (ImmutableSpace +) bottom() <= top() <= end() | |
31 // top() is inclusive and end() is exclusive. | |
32 | |
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33 class MutableSpaceMangler; |
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34 |
0 | 35 class MutableSpace: public ImmutableSpace { |
36 friend class VMStructs; | |
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37 |
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38 // Helper for mangling unused space in debug builds |
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39 MutableSpaceMangler* _mangler; |
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40 |
0 | 41 protected: |
42 HeapWord* _top; | |
43 | |
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44 MutableSpaceMangler* mangler() { return _mangler; } |
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45 |
0 | 46 public: |
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47 virtual ~MutableSpace(); |
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48 MutableSpace(); |
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49 |
0 | 50 // Accessors |
51 HeapWord* top() const { return _top; } | |
52 virtual void set_top(HeapWord* value) { _top = value; } | |
53 | |
54 HeapWord** top_addr() { return &_top; } | |
55 HeapWord** end_addr() { return &_end; } | |
56 | |
57 virtual void set_bottom(HeapWord* value) { _bottom = value; } | |
58 virtual void set_end(HeapWord* value) { _end = value; } | |
59 | |
60 // Returns a subregion containing all objects in this space. | |
61 MemRegion used_region() { return MemRegion(bottom(), top()); } | |
62 | |
63 // Initialization | |
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64 virtual void initialize(MemRegion mr, |
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65 bool clear_space, |
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66 bool mangle_space); |
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67 virtual void clear(bool mangle_space); |
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68 // Does the usual initialization but optionally resets top to bottom. |
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69 #if 0 // MANGLE_SPACE |
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70 void initialize(MemRegion mr, bool clear_space, bool reset_top); |
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71 #endif |
0 | 72 virtual void update() { } |
73 virtual void accumulate_statistics() { } | |
74 | |
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75 // Methods used in mangling. See descriptions under SpaceMangler. |
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76 virtual void mangle_unused_area() PRODUCT_RETURN; |
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77 virtual void mangle_unused_area_complete() PRODUCT_RETURN; |
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78 virtual void check_mangled_unused_area(HeapWord* limit) PRODUCT_RETURN; |
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79 virtual void check_mangled_unused_area_complete() PRODUCT_RETURN; |
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80 virtual void set_top_for_allocations(HeapWord* v) PRODUCT_RETURN; |
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81 |
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82 // Used to save the space's current top for later use during mangling. |
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83 virtual void set_top_for_allocations() PRODUCT_RETURN; |
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84 |
0 | 85 virtual void ensure_parsability() { } |
86 | |
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87 virtual void mangle_region(MemRegion mr) PRODUCT_RETURN; |
0 | 88 |
89 // Boolean querries. | |
90 bool is_empty() const { return used_in_words() == 0; } | |
91 bool not_empty() const { return used_in_words() > 0; } | |
92 bool contains(const void* p) const { return _bottom <= p && p < _end; } | |
93 | |
94 // Size computations. Sizes are in bytes. | |
95 size_t used_in_bytes() const { return used_in_words() * HeapWordSize; } | |
96 size_t free_in_bytes() const { return free_in_words() * HeapWordSize; } | |
97 | |
98 // Size computations. Sizes are in heapwords. | |
99 virtual size_t used_in_words() const { return pointer_delta(top(), bottom()); } | |
100 virtual size_t free_in_words() const { return pointer_delta(end(), top()); } | |
101 virtual size_t tlab_capacity(Thread* thr) const { return capacity_in_bytes(); } | |
102 virtual size_t unsafe_max_tlab_alloc(Thread* thr) const { return free_in_bytes(); } | |
103 | |
104 // Allocation (return NULL if full) | |
105 virtual HeapWord* allocate(size_t word_size); | |
106 virtual HeapWord* cas_allocate(size_t word_size); | |
107 // Optional deallocation. Used in NUMA-allocator. | |
108 bool cas_deallocate(HeapWord *obj, size_t size); | |
109 | |
110 // Iteration. | |
111 void oop_iterate(OopClosure* cl); | |
112 void object_iterate(ObjectClosure* cl); | |
113 | |
114 // Debugging | |
115 virtual void print() const; | |
116 virtual void print_on(outputStream* st) const; | |
117 virtual void print_short() const; | |
118 virtual void print_short_on(outputStream* st) const; | |
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119 virtual void verify(bool allow_dirty); |
0 | 120 }; |