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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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79 | 79 |
80 // Deletes the last small segment kept around by DeleteAll(). | 80 // Deletes the last small segment kept around by DeleteAll(). |
81 void DeleteKeptSegment(); | 81 void DeleteKeptSegment(); |
82 | 82 |
83 // Returns true if more memory has been allocated in zones than | 83 // Returns true if more memory has been allocated in zones than |
84 // the limit allows. | 84 // the limit allows. |
85 inline bool excess_allocation(); | 85 inline bool excess_allocation(); |
86 | 86 |
87 inline void adjust_segment_bytes_allocated(int delta); | 87 inline void adjust_segment_bytes_allocated(int delta); |
88 | 88 |
| 89 inline unsigned allocation_size() { return allocation_size_; } |
| 90 |
89 inline Isolate* isolate() { return isolate_; } | 91 inline Isolate* isolate() { return isolate_; } |
90 | 92 |
91 static unsigned allocation_size_; | |
92 | |
93 private: | 93 private: |
94 friend class Isolate; | 94 friend class Isolate; |
95 friend class ZoneScope; | 95 friend class ZoneScope; |
96 | 96 |
97 // All pointers returned from New() have this alignment. In addition, if the | 97 // All pointers returned from New() have this alignment. In addition, if the |
98 // object being allocated has a size that is divisible by 8 then its alignment | 98 // object being allocated has a size that is divisible by 8 then its alignment |
99 // will be 8. | 99 // will be 8. |
100 static const int kAlignment = kPointerSize; | 100 static const int kAlignment = kPointerSize; |
101 | 101 |
102 // Never allocate segments smaller than this size in bytes. | 102 // Never allocate segments smaller than this size in bytes. |
103 static const int kMinimumSegmentSize = 8 * KB; | 103 static const int kMinimumSegmentSize = 8 * KB; |
104 | 104 |
105 // Never allocate segments larger than this size in bytes. | 105 // Never allocate segments larger than this size in bytes. |
106 static const int kMaximumSegmentSize = 1 * MB; | 106 static const int kMaximumSegmentSize = 1 * MB; |
107 | 107 |
108 // Never keep segments larger than this size in bytes around. | 108 // Never keep segments larger than this size in bytes around. |
109 static const int kMaximumKeptSegmentSize = 64 * KB; | 109 static const int kMaximumKeptSegmentSize = 64 * KB; |
110 | 110 |
111 // Report zone excess when allocation exceeds this limit. | 111 // Report zone excess when allocation exceeds this limit. |
112 int zone_excess_limit_; | 112 int zone_excess_limit_; |
113 | 113 |
| 114 // The number of bytes allocated in this zone so far. |
| 115 unsigned allocation_size_; |
| 116 |
114 // The number of bytes allocated in segments. Note that this number | 117 // The number of bytes allocated in segments. Note that this number |
115 // includes memory allocated from the OS but not yet allocated from | 118 // includes memory allocated from the OS but not yet allocated from |
116 // the zone. | 119 // the zone. |
117 int segment_bytes_allocated_; | 120 int segment_bytes_allocated_; |
118 | 121 |
119 // Expand the Zone to hold at least 'size' more bytes and allocate | 122 // Expand the Zone to hold at least 'size' more bytes and allocate |
120 // the bytes. Returns the address of the newly allocated chunk of | 123 // the bytes. Returns the address of the newly allocated chunk of |
121 // memory in the Zone. Should only be called if there isn't enough | 124 // memory in the Zone. Should only be called if there isn't enough |
122 // room in the Zone already. | 125 // room in the Zone already. |
123 Address NewExpand(int size); | 126 Address NewExpand(int size); |
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264 : SplayTree<Config, ZoneAllocationPolicy>(ZoneAllocationPolicy(zone)) {} | 267 : SplayTree<Config, ZoneAllocationPolicy>(ZoneAllocationPolicy(zone)) {} |
265 ~ZoneSplayTree(); | 268 ~ZoneSplayTree(); |
266 }; | 269 }; |
267 | 270 |
268 | 271 |
269 typedef TemplateHashMapImpl<ZoneAllocationPolicy> ZoneHashMap; | 272 typedef TemplateHashMapImpl<ZoneAllocationPolicy> ZoneHashMap; |
270 | 273 |
271 } } // namespace v8::internal | 274 } } // namespace v8::internal |
272 | 275 |
273 #endif // V8_ZONE_H_ | 276 #endif // V8_ZONE_H_ |
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