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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 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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160 | 160 |
161 | 161 |
162 // We keep the lowest and highest addresses mapped as a quick way of | 162 // We keep the lowest and highest addresses mapped as a quick way of |
163 // determining that pointers are outside the heap (used mostly in assertions | 163 // determining that pointers are outside the heap (used mostly in assertions |
164 // and verification). The estimate is conservative, ie, not all addresses in | 164 // and verification). The estimate is conservative, ie, not all addresses in |
165 // 'allocated' space are actually allocated to our heap. The range is | 165 // 'allocated' space are actually allocated to our heap. The range is |
166 // [lowest, highest), inclusive on the low and and exclusive on the high end. | 166 // [lowest, highest), inclusive on the low and and exclusive on the high end. |
167 static void* lowest_ever_allocated = reinterpret_cast<void*>(-1); | 167 static void* lowest_ever_allocated = reinterpret_cast<void*>(-1); |
168 static void* highest_ever_allocated = reinterpret_cast<void*>(0); | 168 static void* highest_ever_allocated = reinterpret_cast<void*>(0); |
169 | 169 |
| 170 static MutexLockAdapter heap_limits_lock(OS::CreateMutex()); |
170 | 171 |
171 static void UpdateAllocatedSpaceLimits(void* address, int size) { | 172 static void UpdateAllocatedSpaceLimits(void* address, int size) { |
| 173 V8SharedStateLocker heap_limits_locker(&heap_limits_lock); |
172 lowest_ever_allocated = Min(lowest_ever_allocated, address); | 174 lowest_ever_allocated = Min(lowest_ever_allocated, address); |
173 highest_ever_allocated = | 175 highest_ever_allocated = |
174 Max(highest_ever_allocated, | 176 Max(highest_ever_allocated, |
175 reinterpret_cast<void*>(reinterpret_cast<char*>(address) + size)); | 177 reinterpret_cast<void*>(reinterpret_cast<char*>(address) + size)); |
176 } | 178 } |
177 | 179 |
178 | 180 |
179 bool OS::IsOutsideAllocatedSpace(void* address) { | 181 bool OS::IsOutsideAllocatedSpace(void* address) { |
| 182 V8SharedStateLocker heap_limits_locker(&heap_limits_lock); |
180 return address < lowest_ever_allocated || address >= highest_ever_allocated; | 183 return address < lowest_ever_allocated || address >= highest_ever_allocated; |
181 } | 184 } |
182 | 185 |
183 | 186 |
184 size_t OS::AllocateAlignment() { | 187 size_t OS::AllocateAlignment() { |
185 return sysconf(_SC_PAGESIZE); | 188 return sysconf(_SC_PAGESIZE); |
186 } | 189 } |
187 | 190 |
188 | 191 |
189 void* OS::Allocate(const size_t requested, | 192 void* OS::Allocate(const size_t requested, |
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799 | 802 |
800 // This sampler is no longer the active sampler. | 803 // This sampler is no longer the active sampler. |
801 active_sampler_ = NULL; | 804 active_sampler_ = NULL; |
802 active_ = false; | 805 active_ = false; |
803 } | 806 } |
804 | 807 |
805 | 808 |
806 #endif // ENABLE_LOGGING_AND_PROFILING | 809 #endif // ENABLE_LOGGING_AND_PROFILING |
807 | 810 |
808 } } // namespace v8::internal | 811 } } // namespace v8::internal |
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