Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame^] | 1 | // Copyright 2008 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #ifndef V8_COMPILATION_CACHE_H_ |
| 29 | #define V8_COMPILATION_CACHE_H_ |
| 30 | |
| 31 | namespace v8 { |
| 32 | namespace internal { |
| 33 | |
| 34 | |
| 35 | // The compilation cache keeps function boilerplates for compiled |
| 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. |
| 38 | class CompilationCache { |
| 39 | public: |
| 40 | // Finds the script function boilerplate for a source |
| 41 | // string. Returns an empty handle if the cache doesn't contain a |
| 42 | // script for the given source string with the right origin. |
| 43 | static Handle<JSFunction> LookupScript(Handle<String> source, |
| 44 | Handle<Object> name, |
| 45 | int line_offset, |
| 46 | int column_offset); |
| 47 | |
| 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 |
| 50 | // contain a script for the given source string. |
| 51 | static Handle<JSFunction> LookupEval(Handle<String> source, |
| 52 | Handle<Context> context, |
| 53 | bool is_global); |
| 54 | |
| 55 | // Returns the regexp data associated with the given regexp if it |
| 56 | // is in cache, otherwise an empty handle. |
| 57 | static Handle<FixedArray> LookupRegExp(Handle<String> source, |
| 58 | JSRegExp::Flags flags); |
| 59 | |
| 60 | // Associate the (source, kind) pair to the boilerplate. This may |
| 61 | // overwrite an existing mapping. |
| 62 | static void PutScript(Handle<String> source, |
| 63 | Handle<JSFunction> boilerplate); |
| 64 | |
| 65 | // Associate the (source, context->closure()->shared(), kind) triple |
| 66 | // with the boilerplate. This may overwrite an existing mapping. |
| 67 | static void PutEval(Handle<String> source, |
| 68 | Handle<Context> context, |
| 69 | bool is_global, |
| 70 | Handle<JSFunction> boilerplate); |
| 71 | |
| 72 | // Associate the (source, flags) pair to the given regexp data. |
| 73 | // This may overwrite an existing mapping. |
| 74 | static void PutRegExp(Handle<String> source, |
| 75 | JSRegExp::Flags flags, |
| 76 | Handle<FixedArray> data); |
| 77 | |
| 78 | // Clear the cache - also used to initialize the cache at startup. |
| 79 | static void Clear(); |
| 80 | |
| 81 | // GC support. |
| 82 | static void Iterate(ObjectVisitor* v); |
| 83 | |
| 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 |
| 86 | // avoid keeping them alive too long without using them. |
| 87 | static void MarkCompactPrologue(); |
| 88 | |
| 89 | // Enable/disable compilation cache. Used by debugger to disable compilation |
| 90 | // cache during debugging to make sure new scripts are always compiled. |
| 91 | static void Enable(); |
| 92 | static void Disable(); |
| 93 | }; |
| 94 | |
| 95 | |
| 96 | } } // namespace v8::internal |
| 97 | |
| 98 | #endif // V8_COMPILATION_CACHE_H_ |