Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/virtualspace.hpp @ 642:660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
Summary: Use zero based compressed oops if java heap is below 32gb and unscaled compressed oops if java heap is below 4gb.
Reviewed-by: never, twisti, jcoomes, coleenp
| author | kvn |
|---|---|
| date | Thu, 12 Mar 2009 10:37:46 -0700 |
| parents | 9ee9cf798b59 |
| children | 6bdd6923ba16 |
| rev | line source |
|---|---|
| 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
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
0
diff
changeset
|
32 size_t _noaccess_prefix; |
| 0 | 33 size_t _alignment; |
| 34 bool _special; | |
| 35 | |
| 36 // ReservedSpace | |
| 37 ReservedSpace(char* base, size_t size, size_t alignment, bool special); | |
| 38 void initialize(size_t size, size_t alignment, bool large, | |
|
237
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
0
diff
changeset
|
39 char* requested_address, |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
0
diff
changeset
|
40 const size_t noaccess_prefix); |
| 0 | 41 |
| 42 // Release parts of an already-reserved memory region [addr, addr + len) to | |
| 43 // get a new region that has "compound alignment." Return the start of the | |
| 44 // resulting region, or NULL on failure. | |
| 45 // | |
| 46 // The region is logically divided into a prefix and a suffix. The prefix | |
| 47 // starts at the result address, which is aligned to prefix_align. The suffix | |
| 48 // starts at result address + prefix_size, which is aligned to suffix_align. | |
| 49 // The total size of the result region is size prefix_size + suffix_size. | |
| 50 char* align_reserved_region(char* addr, const size_t len, | |
| 51 const size_t prefix_size, | |
| 52 const size_t prefix_align, | |
| 53 const size_t suffix_size, | |
| 54 const size_t suffix_align); | |
| 55 | |
| 56 // Reserve memory, call align_reserved_region() to alignment it and return the | |
| 57 // result. | |
| 58 char* reserve_and_align(const size_t reserve_size, | |
| 59 const size_t prefix_size, | |
| 60 const size_t prefix_align, | |
| 61 const size_t suffix_size, | |
| 62 const size_t suffix_align); | |
| 63 | |
|
237
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
0
diff
changeset
|
64 protected: |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
0
diff
changeset
|
65 // Create protection page at the beginning of the space. |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
0
diff
changeset
|
66 void protect_noaccess_prefix(const size_t size); |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
0
diff
changeset
|
67 |
| 0 | 68 public: |
| 69 // Constructor | |
| 70 ReservedSpace(size_t size); | |
| 71 ReservedSpace(size_t size, size_t alignment, bool large, | |
|
237
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
0
diff
changeset
|
72 char* requested_address = NULL, |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
0
diff
changeset
|
73 const size_t noaccess_prefix = 0); |
| 0 | 74 ReservedSpace(const size_t prefix_size, const size_t prefix_align, |
|
237
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
0
diff
changeset
|
75 const size_t suffix_size, const size_t suffix_align, |
|
642
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
337
diff
changeset
|
76 char* requested_address, |
|
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
337
diff
changeset
|
77 const size_t noaccess_prefix = 0); |
| 0 | 78 |
| 79 // Accessors | |
| 80 char* base() const { return _base; } | |
| 81 size_t size() const { return _size; } | |
| 82 size_t alignment() const { return _alignment; } | |
| 83 bool special() const { return _special; } | |
| 84 | |
|
237
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
0
diff
changeset
|
85 size_t noaccess_prefix() const { return _noaccess_prefix; } |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
0
diff
changeset
|
86 |
| 0 | 87 bool is_reserved() const { return _base != NULL; } |
| 88 void release(); | |
| 89 | |
| 90 // Splitting | |
| 91 ReservedSpace first_part(size_t partition_size, size_t alignment, | |
| 92 bool split = false, bool realloc = true); | |
| 93 ReservedSpace last_part (size_t partition_size, size_t alignment); | |
| 94 | |
| 95 // These simply call the above using the default alignment. | |
| 96 inline ReservedSpace first_part(size_t partition_size, | |
| 97 bool split = false, bool realloc = true); | |
| 98 inline ReservedSpace last_part (size_t partition_size); | |
| 99 | |
| 100 // Alignment | |
| 101 static size_t page_align_size_up(size_t size); | |
| 102 static size_t page_align_size_down(size_t size); | |
| 103 static size_t allocation_align_size_up(size_t size); | |
| 104 static size_t allocation_align_size_down(size_t size); | |
| 105 }; | |
| 106 | |
| 107 ReservedSpace | |
| 108 ReservedSpace::first_part(size_t partition_size, bool split, bool realloc) | |
| 109 { | |
| 110 return first_part(partition_size, alignment(), split, realloc); | |
| 111 } | |
| 112 | |
| 113 ReservedSpace ReservedSpace::last_part(size_t partition_size) | |
| 114 { | |
| 115 return last_part(partition_size, alignment()); | |
| 116 } | |
| 117 | |
|
237
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
0
diff
changeset
|
118 // Class encapsulating behavior specific of memory space reserved for Java heap |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
0
diff
changeset
|
119 class ReservedHeapSpace : public ReservedSpace { |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
0
diff
changeset
|
120 public: |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
0
diff
changeset
|
121 // Constructor |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
0
diff
changeset
|
122 ReservedHeapSpace(size_t size, size_t forced_base_alignment, |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
0
diff
changeset
|
123 bool large, char* requested_address); |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
0
diff
changeset
|
124 ReservedHeapSpace(const size_t prefix_size, const size_t prefix_align, |
|
642
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
337
diff
changeset
|
125 const size_t suffix_size, const size_t suffix_align, |
|
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
337
diff
changeset
|
126 char* requested_address); |
|
237
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
0
diff
changeset
|
127 }; |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
0
diff
changeset
|
128 |
| 0 | 129 // VirtualSpace is data structure for committing a previously reserved address range in smaller chunks. |
| 130 | |
| 131 class VirtualSpace VALUE_OBJ_CLASS_SPEC { | |
| 132 friend class VMStructs; | |
| 133 private: | |
| 134 // Reserved area | |
| 135 char* _low_boundary; | |
| 136 char* _high_boundary; | |
| 137 | |
| 138 // Committed area | |
| 139 char* _low; | |
| 140 char* _high; | |
| 141 | |
| 142 // The entire space has been committed and pinned in memory, no | |
| 143 // os::commit_memory() or os::uncommit_memory(). | |
| 144 bool _special; | |
| 145 | |
| 146 // MPSS Support | |
| 147 // Each virtualspace region has a lower, middle, and upper region. | |
| 148 // Each region has an end boundary and a high pointer which is the | |
| 149 // high water mark for the last allocated byte. | |
| 150 // The lower and upper unaligned to LargePageSizeInBytes uses default page. | |
| 151 // size. The middle region uses large page size. | |
| 152 char* _lower_high; | |
| 153 char* _middle_high; | |
| 154 char* _upper_high; | |
| 155 | |
| 156 char* _lower_high_boundary; | |
| 157 char* _middle_high_boundary; | |
| 158 char* _upper_high_boundary; | |
| 159 | |
| 160 size_t _lower_alignment; | |
| 161 size_t _middle_alignment; | |
| 162 size_t _upper_alignment; | |
| 163 | |
| 164 // MPSS Accessors | |
| 165 char* lower_high() const { return _lower_high; } | |
| 166 char* middle_high() const { return _middle_high; } | |
| 167 char* upper_high() const { return _upper_high; } | |
| 168 | |
| 169 char* lower_high_boundary() const { return _lower_high_boundary; } | |
| 170 char* middle_high_boundary() const { return _middle_high_boundary; } | |
| 171 char* upper_high_boundary() const { return _upper_high_boundary; } | |
| 172 | |
| 173 size_t lower_alignment() const { return _lower_alignment; } | |
| 174 size_t middle_alignment() const { return _middle_alignment; } | |
| 175 size_t upper_alignment() const { return _upper_alignment; } | |
| 176 | |
| 177 public: | |
| 178 // Committed area | |
| 179 char* low() const { return _low; } | |
| 180 char* high() const { return _high; } | |
| 181 | |
| 182 // Reserved area | |
| 183 char* low_boundary() const { return _low_boundary; } | |
| 184 char* high_boundary() const { return _high_boundary; } | |
| 185 | |
| 186 bool special() const { return _special; } | |
| 187 | |
| 188 public: | |
| 189 // Initialization | |
| 190 VirtualSpace(); | |
| 191 bool initialize(ReservedSpace rs, size_t committed_byte_size); | |
| 192 | |
| 193 // Destruction | |
| 194 ~VirtualSpace(); | |
| 195 | |
| 196 // Testers (all sizes are byte sizes) | |
| 197 size_t committed_size() const; | |
| 198 size_t reserved_size() const; | |
| 199 size_t uncommitted_size() const; | |
| 200 bool contains(const void* p) const; | |
| 201 | |
| 202 // Operations | |
| 203 // returns true on success, false otherwise | |
| 204 bool expand_by(size_t bytes, bool pre_touch = false); | |
| 205 void shrink_by(size_t bytes); | |
| 206 void release(); | |
| 207 | |
| 208 void check_for_contiguity() PRODUCT_RETURN; | |
| 209 | |
| 210 // Debugging | |
| 211 void print() PRODUCT_RETURN; | |
| 212 }; |