Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/virtualspace.hpp @ 881:16c930df1e9b
Merge
author | dcubed |
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date | Tue, 28 Jul 2009 13:50:07 -0600 |
parents | 6bdd6923ba16 |
children | bd02caa94611 |
rev | line source |
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0 | 1 /* |
337 | 2 * Copyright 1997-2008 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 // ReservedSpace is a data structure for reserving a contiguous address range. | |
26 | |
27 class ReservedSpace VALUE_OBJ_CLASS_SPEC { | |
28 friend class VMStructs; | |
29 private: | |
30 char* _base; | |
31 size_t _size; | |
237
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32 size_t _noaccess_prefix; |
0 | 33 size_t _alignment; |
34 bool _special; | |
656 | 35 bool _executable; |
0 | 36 |
37 // ReservedSpace | |
656 | 38 ReservedSpace(char* base, size_t size, size_t alignment, bool special, |
39 bool executable); | |
0 | 40 void initialize(size_t size, size_t alignment, bool large, |
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41 char* requested_address, |
656 | 42 const size_t noaccess_prefix, |
43 bool executable); | |
0 | 44 |
45 // Release parts of an already-reserved memory region [addr, addr + len) to | |
46 // get a new region that has "compound alignment." Return the start of the | |
47 // resulting region, or NULL on failure. | |
48 // | |
49 // The region is logically divided into a prefix and a suffix. The prefix | |
50 // starts at the result address, which is aligned to prefix_align. The suffix | |
51 // starts at result address + prefix_size, which is aligned to suffix_align. | |
52 // The total size of the result region is size prefix_size + suffix_size. | |
53 char* align_reserved_region(char* addr, const size_t len, | |
54 const size_t prefix_size, | |
55 const size_t prefix_align, | |
56 const size_t suffix_size, | |
57 const size_t suffix_align); | |
58 | |
59 // Reserve memory, call align_reserved_region() to alignment it and return the | |
60 // result. | |
61 char* reserve_and_align(const size_t reserve_size, | |
62 const size_t prefix_size, | |
63 const size_t prefix_align, | |
64 const size_t suffix_size, | |
65 const size_t suffix_align); | |
66 | |
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67 protected: |
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68 // Create protection page at the beginning of the space. |
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69 void protect_noaccess_prefix(const size_t size); |
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70 |
0 | 71 public: |
72 // Constructor | |
73 ReservedSpace(size_t size); | |
74 ReservedSpace(size_t size, size_t alignment, bool large, | |
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75 char* requested_address = NULL, |
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76 const size_t noaccess_prefix = 0); |
0 | 77 ReservedSpace(const size_t prefix_size, const size_t prefix_align, |
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78 const size_t suffix_size, const size_t suffix_align, |
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79 char* requested_address, |
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80 const size_t noaccess_prefix = 0); |
656 | 81 ReservedSpace(size_t size, size_t alignment, bool large, bool executable); |
0 | 82 |
83 // Accessors | |
656 | 84 char* base() const { return _base; } |
85 size_t size() const { return _size; } | |
86 size_t alignment() const { return _alignment; } | |
87 bool special() const { return _special; } | |
88 bool executable() const { return _executable; } | |
89 size_t noaccess_prefix() const { return _noaccess_prefix; } | |
90 bool is_reserved() const { return _base != NULL; } | |
0 | 91 void release(); |
92 | |
93 // Splitting | |
94 ReservedSpace first_part(size_t partition_size, size_t alignment, | |
95 bool split = false, bool realloc = true); | |
96 ReservedSpace last_part (size_t partition_size, size_t alignment); | |
97 | |
98 // These simply call the above using the default alignment. | |
99 inline ReservedSpace first_part(size_t partition_size, | |
100 bool split = false, bool realloc = true); | |
101 inline ReservedSpace last_part (size_t partition_size); | |
102 | |
103 // Alignment | |
104 static size_t page_align_size_up(size_t size); | |
105 static size_t page_align_size_down(size_t size); | |
106 static size_t allocation_align_size_up(size_t size); | |
107 static size_t allocation_align_size_down(size_t size); | |
108 }; | |
109 | |
110 ReservedSpace | |
111 ReservedSpace::first_part(size_t partition_size, bool split, bool realloc) | |
112 { | |
113 return first_part(partition_size, alignment(), split, realloc); | |
114 } | |
115 | |
116 ReservedSpace ReservedSpace::last_part(size_t partition_size) | |
117 { | |
118 return last_part(partition_size, alignment()); | |
119 } | |
120 | |
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121 // Class encapsulating behavior specific of memory space reserved for Java heap |
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122 class ReservedHeapSpace : public ReservedSpace { |
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123 public: |
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124 // Constructor |
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125 ReservedHeapSpace(size_t size, size_t forced_base_alignment, |
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126 bool large, char* requested_address); |
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127 ReservedHeapSpace(const size_t prefix_size, const size_t prefix_align, |
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128 const size_t suffix_size, const size_t suffix_align, |
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129 char* requested_address); |
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130 }; |
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131 |
656 | 132 // Class encapsulating behavior specific memory space for Code |
133 class ReservedCodeSpace : public ReservedSpace { | |
134 public: | |
135 // Constructor | |
136 ReservedCodeSpace(size_t r_size, size_t rs_align, bool large); | |
137 }; | |
138 | |
0 | 139 // VirtualSpace is data structure for committing a previously reserved address range in smaller chunks. |
140 | |
141 class VirtualSpace VALUE_OBJ_CLASS_SPEC { | |
142 friend class VMStructs; | |
143 private: | |
144 // Reserved area | |
145 char* _low_boundary; | |
146 char* _high_boundary; | |
147 | |
148 // Committed area | |
149 char* _low; | |
150 char* _high; | |
151 | |
152 // The entire space has been committed and pinned in memory, no | |
153 // os::commit_memory() or os::uncommit_memory(). | |
154 bool _special; | |
155 | |
656 | 156 // Need to know if commit should be executable. |
157 bool _executable; | |
158 | |
0 | 159 // MPSS Support |
160 // Each virtualspace region has a lower, middle, and upper region. | |
161 // Each region has an end boundary and a high pointer which is the | |
162 // high water mark for the last allocated byte. | |
163 // The lower and upper unaligned to LargePageSizeInBytes uses default page. | |
164 // size. The middle region uses large page size. | |
165 char* _lower_high; | |
166 char* _middle_high; | |
167 char* _upper_high; | |
168 | |
169 char* _lower_high_boundary; | |
170 char* _middle_high_boundary; | |
171 char* _upper_high_boundary; | |
172 | |
173 size_t _lower_alignment; | |
174 size_t _middle_alignment; | |
175 size_t _upper_alignment; | |
176 | |
177 // MPSS Accessors | |
178 char* lower_high() const { return _lower_high; } | |
179 char* middle_high() const { return _middle_high; } | |
180 char* upper_high() const { return _upper_high; } | |
181 | |
182 char* lower_high_boundary() const { return _lower_high_boundary; } | |
183 char* middle_high_boundary() const { return _middle_high_boundary; } | |
184 char* upper_high_boundary() const { return _upper_high_boundary; } | |
185 | |
186 size_t lower_alignment() const { return _lower_alignment; } | |
187 size_t middle_alignment() const { return _middle_alignment; } | |
188 size_t upper_alignment() const { return _upper_alignment; } | |
189 | |
190 public: | |
191 // Committed area | |
192 char* low() const { return _low; } | |
193 char* high() const { return _high; } | |
194 | |
195 // Reserved area | |
196 char* low_boundary() const { return _low_boundary; } | |
197 char* high_boundary() const { return _high_boundary; } | |
198 | |
199 bool special() const { return _special; } | |
200 | |
201 public: | |
202 // Initialization | |
203 VirtualSpace(); | |
204 bool initialize(ReservedSpace rs, size_t committed_byte_size); | |
205 | |
206 // Destruction | |
207 ~VirtualSpace(); | |
208 | |
209 // Testers (all sizes are byte sizes) | |
210 size_t committed_size() const; | |
211 size_t reserved_size() const; | |
212 size_t uncommitted_size() const; | |
213 bool contains(const void* p) const; | |
214 | |
215 // Operations | |
216 // returns true on success, false otherwise | |
217 bool expand_by(size_t bytes, bool pre_touch = false); | |
218 void shrink_by(size_t bytes); | |
219 void release(); | |
220 | |
221 void check_for_contiguity() PRODUCT_RETURN; | |
222 | |
223 // Debugging | |
224 void print() PRODUCT_RETURN; | |
225 }; |