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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #include "vm/scavenger.h" | 5 #include "vm/scavenger.h" |
6 | 6 |
7 #include "vm/dart.h" | 7 #include "vm/dart.h" |
8 #include "vm/dart_api_state.h" | 8 #include "vm/dart_api_state.h" |
9 #include "vm/isolate.h" | 9 #include "vm/isolate.h" |
10 #include "vm/lockers.h" | 10 #include "vm/lockers.h" |
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26 early_tenuring_threshold, | 26 early_tenuring_threshold, |
27 66, | 27 66, |
28 "When more than this percentage of promotion candidates survive, " | 28 "When more than this percentage of promotion candidates survive, " |
29 "promote all survivors of next scavenge."); | 29 "promote all survivors of next scavenge."); |
30 DEFINE_FLAG(int, | 30 DEFINE_FLAG(int, |
31 new_gen_garbage_threshold, | 31 new_gen_garbage_threshold, |
32 90, | 32 90, |
33 "Grow new gen when less than this percentage is garbage."); | 33 "Grow new gen when less than this percentage is garbage."); |
34 DEFINE_FLAG(int, new_gen_growth_factor, 4, "Grow new gen by this factor."); | 34 DEFINE_FLAG(int, new_gen_growth_factor, 4, "Grow new gen by this factor."); |
35 | 35 |
36 // Scavenger uses RawObject::kMarkBit to distinguish forwaded and non-forwarded | 36 // Scavenger uses RawObject::kMarkBit to distinguish forwarded and non-forwarded |
37 // objects. The kMarkBit does not intersect with the target address because of | 37 // objects. The kMarkBit does not intersect with the target address because of |
38 // object alignment. | 38 // object alignment. |
39 enum { | 39 enum { |
40 kForwardingMask = 1 << RawObject::kMarkBit, | 40 kForwardingMask = 1 << RawObject::kMarkBit, |
41 kNotForwarded = 0, | 41 kNotForwarded = 0, |
42 kForwarded = kForwardingMask, | 42 kForwarded = kForwardingMask, |
43 }; | 43 }; |
44 | 44 |
45 | 45 |
46 static inline bool IsForwarding(uword header) { | 46 static inline bool IsForwarding(uword header) { |
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899 } | 899 } |
900 | 900 |
901 | 901 |
902 void Scavenger::FreeExternal(intptr_t size) { | 902 void Scavenger::FreeExternal(intptr_t size) { |
903 ASSERT(size >= 0); | 903 ASSERT(size >= 0); |
904 external_size_ -= size; | 904 external_size_ -= size; |
905 ASSERT(external_size_ >= 0); | 905 ASSERT(external_size_ >= 0); |
906 } | 906 } |
907 | 907 |
908 } // namespace dart | 908 } // namespace dart |
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