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Side by Side Diff: src/stub-cache.h

Issue 2463002: - Add a pointer to StubCache from Isolate.... (Closed) Base URL: http://v8.googlecode.com/svn/branches/experimental/isolates/
Patch Set: '' Created 10 years, 6 months ago
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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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37 // The stub cache is used for megamorphic calls and property accesses. 37 // The stub cache is used for megamorphic calls and property accesses.
38 // It maps (map, name, type)->Code* 38 // It maps (map, name, type)->Code*
39 39
40 // The design of the table uses the inline cache stubs used for 40 // The design of the table uses the inline cache stubs used for
41 // mono-morphic calls. The beauty of this, we do not have to 41 // mono-morphic calls. The beauty of this, we do not have to
42 // invalidate the cache whenever a prototype map is changed. The stub 42 // invalidate the cache whenever a prototype map is changed. The stub
43 // validates the map chain as in the mono-morphic case. 43 // validates the map chain as in the mono-morphic case.
44 44
45 class SCTableReference; 45 class SCTableReference;
46 46
47 class StubCache : public AllStatic { 47 class StubCache {
48 public: 48 public:
49 struct Entry { 49 struct Entry {
50 String* key; 50 String* key;
51 Code* value; 51 Code* value;
52 }; 52 };
53 53
54 54
55 static void Initialize(bool create_heap_objects); 55 static void Initialize(bool create_heap_objects);
56 56
57 // Computes the right stub matching. Inserts the result in the 57 // Computes the right stub matching. Inserts the result in the
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208 Register name, 208 Register name,
209 Register scratch, 209 Register scratch,
210 Register extra); 210 Register extra);
211 211
212 enum Table { 212 enum Table {
213 kPrimary, 213 kPrimary,
214 kSecondary 214 kSecondary
215 }; 215 };
216 216
217 private: 217 private:
218 StubCache();
219
220 friend class Isolate;
218 friend class SCTableReference; 221 friend class SCTableReference;
219 static const int kPrimaryTableSize = 2048; 222 static const int kPrimaryTableSize = 2048;
220 static const int kSecondaryTableSize = 512; 223 static const int kSecondaryTableSize = 512;
221 static Entry primary_[]; 224 static Entry primary_[];
222 static Entry secondary_[]; 225 static Entry secondary_[];
223 226
224 // Computes the hashed offsets for primary and secondary caches. 227 // Computes the hashed offsets for primary and secondary caches.
225 static int PrimaryOffset(String* name, Code::Flags flags, Map* map) { 228 static int PrimaryOffset(String* name, Code::Flags flags, Map* map) {
226 // This works well because the heap object tag size and the hash 229 // This works well because the heap object tag size and the hash
227 // shift are equal. Shifting down the length field to get the 230 // shift are equal. Shifting down the length field to get the
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692 695
693 JSFunction* constant_function_; 696 JSFunction* constant_function_;
694 bool is_simple_api_call_; 697 bool is_simple_api_call_;
695 FunctionTemplateInfo* expected_receiver_type_; 698 FunctionTemplateInfo* expected_receiver_type_;
696 CallHandlerInfo* api_call_info_; 699 CallHandlerInfo* api_call_info_;
697 }; 700 };
698 701
699 } } // namespace v8::internal 702 } } // namespace v8::internal
700 703
701 #endif // V8_STUB_CACHE_H_ 704 #endif // V8_STUB_CACHE_H_
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