Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/virtualspace.hpp @ 18096:ca6d25be853b jdk8u25-b13
8044269: Analysis of archive files.
Summary: Add checksum verification.
Reviewed-by: iklam, dholmes, mschoene
| author | jiangli |
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| date | Tue, 12 Aug 2014 17:46:16 -0400 |
| parents | 55fb97c4c58d |
| children | 4ca6dc0799b6 |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 1997, 2013, 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_RUNTIME_VIRTUALSPACE_HPP |
| 26 #define SHARE_VM_RUNTIME_VIRTUALSPACE_HPP | |
| 27 | |
| 28 #include "memory/allocation.hpp" | |
| 29 | |
| 0 | 30 // ReservedSpace is a data structure for reserving a contiguous address range. |
| 31 | |
| 32 class ReservedSpace VALUE_OBJ_CLASS_SPEC { | |
| 33 friend class VMStructs; | |
| 34 private: | |
| 35 char* _base; | |
| 36 size_t _size; | |
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37 size_t _noaccess_prefix; |
| 0 | 38 size_t _alignment; |
| 39 bool _special; | |
| 656 | 40 bool _executable; |
| 0 | 41 |
| 42 // ReservedSpace | |
| 656 | 43 ReservedSpace(char* base, size_t size, size_t alignment, bool special, |
| 44 bool executable); | |
| 0 | 45 void initialize(size_t size, size_t alignment, bool large, |
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46 char* requested_address, |
| 656 | 47 const size_t noaccess_prefix, |
| 48 bool executable); | |
| 0 | 49 |
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50 protected: |
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51 // Create protection page at the beginning of the space. |
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52 void protect_noaccess_prefix(const size_t size); |
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53 |
| 0 | 54 public: |
| 55 // Constructor | |
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56 ReservedSpace(); |
| 0 | 57 ReservedSpace(size_t size); |
| 58 ReservedSpace(size_t size, size_t alignment, bool large, | |
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59 char* requested_address = NULL, |
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60 const size_t noaccess_prefix = 0); |
| 656 | 61 ReservedSpace(size_t size, size_t alignment, bool large, bool executable); |
| 0 | 62 |
| 63 // Accessors | |
| 656 | 64 char* base() const { return _base; } |
| 65 size_t size() const { return _size; } | |
| 66 size_t alignment() const { return _alignment; } | |
| 67 bool special() const { return _special; } | |
| 68 bool executable() const { return _executable; } | |
| 69 size_t noaccess_prefix() const { return _noaccess_prefix; } | |
| 70 bool is_reserved() const { return _base != NULL; } | |
| 0 | 71 void release(); |
| 72 | |
| 73 // Splitting | |
| 74 ReservedSpace first_part(size_t partition_size, size_t alignment, | |
| 75 bool split = false, bool realloc = true); | |
| 76 ReservedSpace last_part (size_t partition_size, size_t alignment); | |
| 77 | |
| 78 // These simply call the above using the default alignment. | |
| 79 inline ReservedSpace first_part(size_t partition_size, | |
| 80 bool split = false, bool realloc = true); | |
| 81 inline ReservedSpace last_part (size_t partition_size); | |
| 82 | |
| 83 // Alignment | |
| 84 static size_t page_align_size_up(size_t size); | |
| 85 static size_t page_align_size_down(size_t size); | |
| 86 static size_t allocation_align_size_up(size_t size); | |
| 87 static size_t allocation_align_size_down(size_t size); | |
| 88 }; | |
| 89 | |
| 90 ReservedSpace | |
| 91 ReservedSpace::first_part(size_t partition_size, bool split, bool realloc) | |
| 92 { | |
| 93 return first_part(partition_size, alignment(), split, realloc); | |
| 94 } | |
| 95 | |
| 96 ReservedSpace ReservedSpace::last_part(size_t partition_size) | |
| 97 { | |
| 98 return last_part(partition_size, alignment()); | |
| 99 } | |
| 100 | |
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101 // Class encapsulating behavior specific of memory space reserved for Java heap |
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102 class ReservedHeapSpace : public ReservedSpace { |
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103 public: |
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104 // Constructor |
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105 ReservedHeapSpace(size_t size, size_t forced_base_alignment, |
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106 bool large, char* requested_address); |
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107 }; |
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108 |
| 656 | 109 // Class encapsulating behavior specific memory space for Code |
| 110 class ReservedCodeSpace : public ReservedSpace { | |
| 111 public: | |
| 112 // Constructor | |
| 113 ReservedCodeSpace(size_t r_size, size_t rs_align, bool large); | |
| 114 }; | |
| 115 | |
| 0 | 116 // VirtualSpace is data structure for committing a previously reserved address range in smaller chunks. |
| 117 | |
| 118 class VirtualSpace VALUE_OBJ_CLASS_SPEC { | |
| 119 friend class VMStructs; | |
| 120 private: | |
| 121 // Reserved area | |
| 122 char* _low_boundary; | |
| 123 char* _high_boundary; | |
| 124 | |
| 125 // Committed area | |
| 126 char* _low; | |
| 127 char* _high; | |
| 128 | |
| 129 // The entire space has been committed and pinned in memory, no | |
| 130 // os::commit_memory() or os::uncommit_memory(). | |
| 131 bool _special; | |
| 132 | |
| 656 | 133 // Need to know if commit should be executable. |
| 134 bool _executable; | |
| 135 | |
| 0 | 136 // MPSS Support |
| 137 // Each virtualspace region has a lower, middle, and upper region. | |
| 138 // Each region has an end boundary and a high pointer which is the | |
| 139 // high water mark for the last allocated byte. | |
| 140 // The lower and upper unaligned to LargePageSizeInBytes uses default page. | |
| 141 // size. The middle region uses large page size. | |
| 142 char* _lower_high; | |
| 143 char* _middle_high; | |
| 144 char* _upper_high; | |
| 145 | |
| 146 char* _lower_high_boundary; | |
| 147 char* _middle_high_boundary; | |
| 148 char* _upper_high_boundary; | |
| 149 | |
| 150 size_t _lower_alignment; | |
| 151 size_t _middle_alignment; | |
| 152 size_t _upper_alignment; | |
| 153 | |
| 154 // MPSS Accessors | |
| 155 char* lower_high() const { return _lower_high; } | |
| 156 char* middle_high() const { return _middle_high; } | |
| 157 char* upper_high() const { return _upper_high; } | |
| 158 | |
| 159 char* lower_high_boundary() const { return _lower_high_boundary; } | |
| 160 char* middle_high_boundary() const { return _middle_high_boundary; } | |
| 161 char* upper_high_boundary() const { return _upper_high_boundary; } | |
| 162 | |
| 163 size_t lower_alignment() const { return _lower_alignment; } | |
| 164 size_t middle_alignment() const { return _middle_alignment; } | |
| 165 size_t upper_alignment() const { return _upper_alignment; } | |
| 166 | |
| 167 public: | |
| 168 // Committed area | |
| 169 char* low() const { return _low; } | |
| 170 char* high() const { return _high; } | |
| 171 | |
| 172 // Reserved area | |
| 173 char* low_boundary() const { return _low_boundary; } | |
| 174 char* high_boundary() const { return _high_boundary; } | |
| 175 | |
| 176 bool special() const { return _special; } | |
| 177 | |
| 178 public: | |
| 179 // Initialization | |
| 180 VirtualSpace(); | |
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181 bool initialize_with_granularity(ReservedSpace rs, size_t committed_byte_size, size_t max_commit_ganularity); |
| 0 | 182 bool initialize(ReservedSpace rs, size_t committed_byte_size); |
| 183 | |
| 184 // Destruction | |
| 185 ~VirtualSpace(); | |
| 186 | |
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187 // Reserved memory |
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188 size_t reserved_size() const; |
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189 // Actually committed OS memory |
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190 size_t actual_committed_size() const; |
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191 // Memory used/expanded in this virtual space |
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192 size_t committed_size() const; |
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193 // Memory left to use/expand in this virtual space |
| 0 | 194 size_t uncommitted_size() const; |
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195 |
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196 bool contains(const void* p) const; |
| 0 | 197 |
| 198 // Operations | |
| 199 // returns true on success, false otherwise | |
| 200 bool expand_by(size_t bytes, bool pre_touch = false); | |
| 201 void shrink_by(size_t bytes); | |
| 202 void release(); | |
| 203 | |
| 204 void check_for_contiguity() PRODUCT_RETURN; | |
| 205 | |
| 206 // Debugging | |
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207 void print_on(outputStream* out) PRODUCT_RETURN; |
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208 void print(); |
| 0 | 209 }; |
| 1972 | 210 |
| 211 #endif // SHARE_VM_RUNTIME_VIRTUALSPACE_HPP |