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1 // Copyright 2008 the V8 project authors. All rights reserved. | 1 // Copyright 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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33 | 33 |
34 | 34 |
35 // The compilation cache keeps function boilerplates for compiled | 35 // The compilation cache keeps function boilerplates for compiled |
36 // scripts and evals. The boilerplates are looked up using the source | 36 // scripts and evals. The boilerplates are looked up using the source |
37 // string as the key. For regular expressions the compilation data is cached. | 37 // string as the key. For regular expressions the compilation data is cached. |
38 class CompilationCache { | 38 class CompilationCache { |
39 public: | 39 public: |
40 // Finds the script function boilerplate for a source | 40 // Finds the script function boilerplate for a source |
41 // string. Returns an empty handle if the cache doesn't contain a | 41 // string. Returns an empty handle if the cache doesn't contain a |
42 // script for the given source string with the right origin. | 42 // script for the given source string with the right origin. |
43 static Handle<JSFunction> LookupScript(Handle<String> source, | 43 static Handle<SharedFunctionInfo> LookupScript(Handle<String> source, |
44 Handle<Object> name, | 44 Handle<Object> name, |
45 int line_offset, | 45 int line_offset, |
46 int column_offset); | 46 int column_offset); |
47 | 47 |
48 // Finds the function boilerplate for a source string for eval in a | 48 // Finds the function boilerplate for a source string for eval in a |
49 // given context. Returns an empty handle if the cache doesn't | 49 // given context. Returns an empty handle if the cache doesn't |
50 // contain a script for the given source string. | 50 // contain a script for the given source string. |
51 static Handle<JSFunction> LookupEval(Handle<String> source, | 51 static Handle<SharedFunctionInfo> LookupEval(Handle<String> source, |
52 Handle<Context> context, | 52 Handle<Context> context, |
53 bool is_global); | 53 bool is_global); |
54 | 54 |
55 // Returns the regexp data associated with the given regexp if it | 55 // Returns the regexp data associated with the given regexp if it |
56 // is in cache, otherwise an empty handle. | 56 // is in cache, otherwise an empty handle. |
57 static Handle<FixedArray> LookupRegExp(Handle<String> source, | 57 static Handle<FixedArray> LookupRegExp(Handle<String> source, |
58 JSRegExp::Flags flags); | 58 JSRegExp::Flags flags); |
59 | 59 |
60 // Associate the (source, kind) pair to the boilerplate. This may | 60 // Associate the (source, kind) pair to the boilerplate. This may |
61 // overwrite an existing mapping. | 61 // overwrite an existing mapping. |
62 static void PutScript(Handle<String> source, | 62 static void PutScript(Handle<String> source, |
63 Handle<JSFunction> boilerplate); | 63 Handle<SharedFunctionInfo> function_info); |
64 | 64 |
65 // Associate the (source, context->closure()->shared(), kind) triple | 65 // Associate the (source, context->closure()->shared(), kind) triple |
66 // with the boilerplate. This may overwrite an existing mapping. | 66 // with the boilerplate. This may overwrite an existing mapping. |
67 static void PutEval(Handle<String> source, | 67 static void PutEval(Handle<String> source, |
68 Handle<Context> context, | 68 Handle<Context> context, |
69 bool is_global, | 69 bool is_global, |
70 Handle<JSFunction> boilerplate); | 70 Handle<SharedFunctionInfo> function_info); |
71 | 71 |
72 // Associate the (source, flags) pair to the given regexp data. | 72 // Associate the (source, flags) pair to the given regexp data. |
73 // This may overwrite an existing mapping. | 73 // This may overwrite an existing mapping. |
74 static void PutRegExp(Handle<String> source, | 74 static void PutRegExp(Handle<String> source, |
75 JSRegExp::Flags flags, | 75 JSRegExp::Flags flags, |
76 Handle<FixedArray> data); | 76 Handle<FixedArray> data); |
77 | 77 |
78 // Clear the cache - also used to initialize the cache at startup. | 78 // Clear the cache - also used to initialize the cache at startup. |
79 static void Clear(); | 79 static void Clear(); |
80 | 80 |
81 // GC support. | 81 // GC support. |
82 static void Iterate(ObjectVisitor* v); | 82 static void Iterate(ObjectVisitor* v); |
83 | 83 |
84 // Notify the cache that a mark-sweep garbage collection is about to | 84 // Notify the cache that a mark-sweep garbage collection is about to |
85 // take place. This is used to retire entries from the cache to | 85 // take place. This is used to retire entries from the cache to |
86 // avoid keeping them alive too long without using them. | 86 // avoid keeping them alive too long without using them. |
87 static void MarkCompactPrologue(); | 87 static void MarkCompactPrologue(); |
88 | 88 |
89 // Enable/disable compilation cache. Used by debugger to disable compilation | 89 // Enable/disable compilation cache. Used by debugger to disable compilation |
90 // cache during debugging to make sure new scripts are always compiled. | 90 // cache during debugging to make sure new scripts are always compiled. |
91 static void Enable(); | 91 static void Enable(); |
92 static void Disable(); | 92 static void Disable(); |
93 }; | 93 }; |
94 | 94 |
95 | 95 |
96 } } // namespace v8::internal | 96 } } // namespace v8::internal |
97 | 97 |
98 #endif // V8_COMPILATION_CACHE_H_ | 98 #endif // V8_COMPILATION_CACHE_H_ |
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