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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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995 isolate_->set_context_exit_happened(false); | 995 isolate_->set_context_exit_happened(false); |
996 } | 996 } |
997 | 997 |
998 | 998 |
999 void Heap::MarkCompactPrologue() { | 999 void Heap::MarkCompactPrologue() { |
1000 // At any old GC clear the keyed lookup cache to enable collection of unused | 1000 // At any old GC clear the keyed lookup cache to enable collection of unused |
1001 // maps. | 1001 // maps. |
1002 isolate_->keyed_lookup_cache()->Clear(); | 1002 isolate_->keyed_lookup_cache()->Clear(); |
1003 isolate_->context_slot_cache()->Clear(); | 1003 isolate_->context_slot_cache()->Clear(); |
1004 isolate_->descriptor_lookup_cache()->Clear(); | 1004 isolate_->descriptor_lookup_cache()->Clear(); |
1005 StringSplitCache::Clear(string_split_cache()); | 1005 RegExpResultsCache::Clear(string_split_cache()); |
| 1006 RegExpResultsCache::Clear(regexp_multiple_cache()); |
1006 | 1007 |
1007 isolate_->compilation_cache()->MarkCompactPrologue(); | 1008 isolate_->compilation_cache()->MarkCompactPrologue(); |
1008 | 1009 |
1009 CompletelyClearInstanceofCache(); | 1010 CompletelyClearInstanceofCache(); |
1010 | 1011 |
1011 FlushNumberStringCache(); | 1012 FlushNumberStringCache(); |
1012 if (FLAG_cleanup_code_caches_at_gc) { | 1013 if (FLAG_cleanup_code_caches_at_gc) { |
1013 polymorphic_code_cache()->set_cache(undefined_value()); | 1014 polymorphic_code_cache()->set_cache(undefined_value()); |
1014 } | 1015 } |
1015 | 1016 |
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2750 set_number_string_cache(FixedArray::cast(obj)); | 2751 set_number_string_cache(FixedArray::cast(obj)); |
2751 | 2752 |
2752 // Allocate cache for single character ASCII strings. | 2753 // Allocate cache for single character ASCII strings. |
2753 { MaybeObject* maybe_obj = | 2754 { MaybeObject* maybe_obj = |
2754 AllocateFixedArray(String::kMaxAsciiCharCode + 1, TENURED); | 2755 AllocateFixedArray(String::kMaxAsciiCharCode + 1, TENURED); |
2755 if (!maybe_obj->ToObject(&obj)) return false; | 2756 if (!maybe_obj->ToObject(&obj)) return false; |
2756 } | 2757 } |
2757 set_single_character_string_cache(FixedArray::cast(obj)); | 2758 set_single_character_string_cache(FixedArray::cast(obj)); |
2758 | 2759 |
2759 // Allocate cache for string split. | 2760 // Allocate cache for string split. |
2760 { MaybeObject* maybe_obj = | 2761 { MaybeObject* maybe_obj = AllocateFixedArray( |
2761 AllocateFixedArray(StringSplitCache::kStringSplitCacheSize, TENURED); | 2762 RegExpResultsCache::kRegExpResultsCacheSize, TENURED); |
2762 if (!maybe_obj->ToObject(&obj)) return false; | 2763 if (!maybe_obj->ToObject(&obj)) return false; |
2763 } | 2764 } |
2764 set_string_split_cache(FixedArray::cast(obj)); | 2765 set_string_split_cache(FixedArray::cast(obj)); |
2765 | 2766 |
| 2767 { MaybeObject* maybe_obj = AllocateFixedArray( |
| 2768 RegExpResultsCache::kRegExpResultsCacheSize, TENURED); |
| 2769 if (!maybe_obj->ToObject(&obj)) return false; |
| 2770 } |
| 2771 set_regexp_multiple_cache(FixedArray::cast(obj)); |
| 2772 |
2766 // Allocate cache for external strings pointing to native source code. | 2773 // Allocate cache for external strings pointing to native source code. |
2767 { MaybeObject* maybe_obj = AllocateFixedArray(Natives::GetBuiltinsCount()); | 2774 { MaybeObject* maybe_obj = AllocateFixedArray(Natives::GetBuiltinsCount()); |
2768 if (!maybe_obj->ToObject(&obj)) return false; | 2775 if (!maybe_obj->ToObject(&obj)) return false; |
2769 } | 2776 } |
2770 set_natives_source_cache(FixedArray::cast(obj)); | 2777 set_natives_source_cache(FixedArray::cast(obj)); |
2771 | 2778 |
2772 // Handling of script id generation is in FACTORY->NewScript. | 2779 // Handling of script id generation is in FACTORY->NewScript. |
2773 set_last_script_id(undefined_value()); | 2780 set_last_script_id(undefined_value()); |
2774 | 2781 |
2775 // Initialize keyed lookup cache. | 2782 // Initialize keyed lookup cache. |
2776 isolate_->keyed_lookup_cache()->Clear(); | 2783 isolate_->keyed_lookup_cache()->Clear(); |
2777 | 2784 |
2778 // Initialize context slot cache. | 2785 // Initialize context slot cache. |
2779 isolate_->context_slot_cache()->Clear(); | 2786 isolate_->context_slot_cache()->Clear(); |
2780 | 2787 |
2781 // Initialize descriptor cache. | 2788 // Initialize descriptor cache. |
2782 isolate_->descriptor_lookup_cache()->Clear(); | 2789 isolate_->descriptor_lookup_cache()->Clear(); |
2783 | 2790 |
2784 // Initialize compilation cache. | 2791 // Initialize compilation cache. |
2785 isolate_->compilation_cache()->Clear(); | 2792 isolate_->compilation_cache()->Clear(); |
2786 | 2793 |
2787 return true; | 2794 return true; |
2788 } | 2795 } |
2789 | 2796 |
2790 | 2797 |
2791 Object* StringSplitCache::Lookup( | 2798 Object* RegExpResultsCache::Lookup( |
2792 FixedArray* cache, String* string, String* pattern) { | 2799 FixedArray* cache, String* string, Object* pattern) { |
2793 if (!string->IsSymbol() || !pattern->IsSymbol()) return Smi::FromInt(0); | 2800 if (!string->IsSymbol() || (pattern->IsString() && !pattern->IsSymbol())) { |
| 2801 return Smi::FromInt(0); |
| 2802 } |
2794 uint32_t hash = string->Hash(); | 2803 uint32_t hash = string->Hash(); |
2795 uint32_t index = ((hash & (kStringSplitCacheSize - 1)) & | 2804 uint32_t index = ((hash & (kRegExpResultsCacheSize - 1)) & |
2796 ~(kArrayEntriesPerCacheEntry - 1)); | 2805 ~(kArrayEntriesPerCacheEntry - 1)); |
2797 if (cache->get(index + kStringOffset) == string && | 2806 if (cache->get(index + kStringOffset) == string && |
2798 cache->get(index + kPatternOffset) == pattern) { | 2807 cache->get(index + kPatternOffset) == pattern) { |
2799 return cache->get(index + kArrayOffset); | 2808 return cache->get(index + kArrayOffset); |
2800 } | 2809 } |
2801 index = ((index + kArrayEntriesPerCacheEntry) & (kStringSplitCacheSize - 1)); | 2810 index = |
| 2811 ((index + kArrayEntriesPerCacheEntry) & (kRegExpResultsCacheSize - 1)); |
2802 if (cache->get(index + kStringOffset) == string && | 2812 if (cache->get(index + kStringOffset) == string && |
2803 cache->get(index + kPatternOffset) == pattern) { | 2813 cache->get(index + kPatternOffset) == pattern) { |
2804 return cache->get(index + kArrayOffset); | 2814 return cache->get(index + kArrayOffset); |
2805 } | 2815 } |
2806 return Smi::FromInt(0); | 2816 return Smi::FromInt(0); |
2807 } | 2817 } |
2808 | 2818 |
2809 | 2819 |
2810 void StringSplitCache::Enter(Heap* heap, | 2820 void RegExpResultsCache::Enter(Heap* heap, |
2811 FixedArray* cache, | 2821 FixedArray* cache, |
2812 String* string, | 2822 String* string, |
2813 String* pattern, | 2823 Object* pattern, |
2814 FixedArray* array) { | 2824 FixedArray* array) { |
2815 if (!string->IsSymbol() || !pattern->IsSymbol()) return; | 2825 if (!string->IsSymbol() || (pattern->IsString() && !pattern->IsSymbol())) { |
| 2826 return; |
| 2827 } |
2816 uint32_t hash = string->Hash(); | 2828 uint32_t hash = string->Hash(); |
2817 uint32_t index = ((hash & (kStringSplitCacheSize - 1)) & | 2829 uint32_t index = ((hash & (kRegExpResultsCacheSize - 1)) & |
2818 ~(kArrayEntriesPerCacheEntry - 1)); | 2830 ~(kArrayEntriesPerCacheEntry - 1)); |
2819 if (cache->get(index + kStringOffset) == Smi::FromInt(0)) { | 2831 if (cache->get(index + kStringOffset) == Smi::FromInt(0)) { |
2820 cache->set(index + kStringOffset, string); | 2832 cache->set(index + kStringOffset, string); |
2821 cache->set(index + kPatternOffset, pattern); | 2833 cache->set(index + kPatternOffset, pattern); |
2822 cache->set(index + kArrayOffset, array); | 2834 cache->set(index + kArrayOffset, array); |
2823 } else { | 2835 } else { |
2824 uint32_t index2 = | 2836 uint32_t index2 = |
2825 ((index + kArrayEntriesPerCacheEntry) & (kStringSplitCacheSize - 1)); | 2837 ((index + kArrayEntriesPerCacheEntry) & (kRegExpResultsCacheSize - 1)); |
2826 if (cache->get(index2 + kStringOffset) == Smi::FromInt(0)) { | 2838 if (cache->get(index2 + kStringOffset) == Smi::FromInt(0)) { |
2827 cache->set(index2 + kStringOffset, string); | 2839 cache->set(index2 + kStringOffset, string); |
2828 cache->set(index2 + kPatternOffset, pattern); | 2840 cache->set(index2 + kPatternOffset, pattern); |
2829 cache->set(index2 + kArrayOffset, array); | 2841 cache->set(index2 + kArrayOffset, array); |
2830 } else { | 2842 } else { |
2831 cache->set(index2 + kStringOffset, Smi::FromInt(0)); | 2843 cache->set(index2 + kStringOffset, Smi::FromInt(0)); |
2832 cache->set(index2 + kPatternOffset, Smi::FromInt(0)); | 2844 cache->set(index2 + kPatternOffset, Smi::FromInt(0)); |
2833 cache->set(index2 + kArrayOffset, Smi::FromInt(0)); | 2845 cache->set(index2 + kArrayOffset, Smi::FromInt(0)); |
2834 cache->set(index + kStringOffset, string); | 2846 cache->set(index + kStringOffset, string); |
2835 cache->set(index + kPatternOffset, pattern); | 2847 cache->set(index + kPatternOffset, pattern); |
2836 cache->set(index + kArrayOffset, array); | 2848 cache->set(index + kArrayOffset, array); |
2837 } | 2849 } |
2838 } | 2850 } |
2839 if (array->length() < 100) { // Limit how many new symbols we want to make. | 2851 if (pattern->IsString() && array->length() < 100) { |
| 2852 // Limit how many new symbols we want to make, when used on a list only |
| 2853 // consisting of strings. |
2840 for (int i = 0; i < array->length(); i++) { | 2854 for (int i = 0; i < array->length(); i++) { |
2841 String* str = String::cast(array->get(i)); | 2855 String* str = String::cast(array->get(i)); |
2842 Object* symbol; | 2856 Object* symbol; |
2843 MaybeObject* maybe_symbol = heap->LookupSymbol(str); | 2857 MaybeObject* maybe_symbol = heap->LookupSymbol(str); |
2844 if (maybe_symbol->ToObject(&symbol)) { | 2858 if (maybe_symbol->ToObject(&symbol)) { |
2845 array->set(i, symbol); | 2859 array->set(i, symbol); |
2846 } | 2860 } |
2847 } | 2861 } |
2848 } | 2862 } |
2849 array->set_map_no_write_barrier(heap->fixed_cow_array_map()); | 2863 array->set_map_no_write_barrier(heap->fixed_cow_array_map()); |
2850 } | 2864 } |
2851 | 2865 |
2852 | 2866 |
2853 void StringSplitCache::Clear(FixedArray* cache) { | 2867 void RegExpResultsCache::Clear(FixedArray* cache) { |
2854 for (int i = 0; i < kStringSplitCacheSize; i++) { | 2868 for (int i = 0; i < kRegExpResultsCacheSize; i++) { |
2855 cache->set(i, Smi::FromInt(0)); | 2869 cache->set(i, Smi::FromInt(0)); |
2856 } | 2870 } |
2857 } | 2871 } |
2858 | 2872 |
2859 | 2873 |
2860 MaybeObject* Heap::AllocateInitialNumberStringCache() { | 2874 MaybeObject* Heap::AllocateInitialNumberStringCache() { |
2861 MaybeObject* maybe_obj = | 2875 MaybeObject* maybe_obj = |
2862 AllocateFixedArray(kInitialNumberStringCacheSize * 2, TENURED); | 2876 AllocateFixedArray(kInitialNumberStringCacheSize * 2, TENURED); |
2863 return maybe_obj; | 2877 return maybe_obj; |
2864 } | 2878 } |
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7262 static_cast<int>(object_sizes_last_time_[index])); | 7276 static_cast<int>(object_sizes_last_time_[index])); |
7263 FIXED_ARRAY_SUB_INSTANCE_TYPE_LIST(ADJUST_LAST_TIME_OBJECT_COUNT) | 7277 FIXED_ARRAY_SUB_INSTANCE_TYPE_LIST(ADJUST_LAST_TIME_OBJECT_COUNT) |
7264 #undef ADJUST_LAST_TIME_OBJECT_COUNT | 7278 #undef ADJUST_LAST_TIME_OBJECT_COUNT |
7265 | 7279 |
7266 memcpy(object_counts_last_time_, object_counts_, sizeof(object_counts_)); | 7280 memcpy(object_counts_last_time_, object_counts_, sizeof(object_counts_)); |
7267 memcpy(object_sizes_last_time_, object_sizes_, sizeof(object_sizes_)); | 7281 memcpy(object_sizes_last_time_, object_sizes_, sizeof(object_sizes_)); |
7268 ClearObjectStats(); | 7282 ClearObjectStats(); |
7269 } | 7283 } |
7270 | 7284 |
7271 } } // namespace v8::internal | 7285 } } // namespace v8::internal |
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