// Copyright 2008 the V8 project authors. All rights reserved. // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following // disclaimer in the documentation and/or other materials provided // with the distribution. // * Neither the name of Google Inc. nor the names of its // contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. #ifndef V8_COMPILATION_CACHE_H_ #define V8_COMPILATION_CACHE_H_ namespace v8 { namespace internal { // The compilation cache keeps function boilerplates for compiled // scripts and evals. The boilerplates are looked up using the source // string as the key. class CompilationCache { public: // The same source code string has different compiled code for // scripts and evals. Internally, we use separate caches to avoid // getting the wrong kind of entry when looking up. enum Entry { EVAL_GLOBAL, EVAL_CONTEXTUAL, REGEXP, SCRIPT, LAST_ENTRY = SCRIPT }; // Finds the script function boilerplate for a source // string. Returns an empty handle if the cache doesn't contain a // script for the given source string with the right origin. static Handle<JSFunction> LookupScript(Handle<String> source, Handle<Object> name, int line_offset, int column_offset); // Finds the function boilerplate for a source string for eval in a // given context. Returns an empty handle if the cache doesn't // contain a script for the given source string. static Handle<JSFunction> LookupEval(Handle<String> source, Handle<Context> context, Entry entry); // Returns the regexp data associated with the given regexp if it // is in cache, otherwise an empty handle. static Handle<FixedArray> LookupRegExp(Handle<String> source, JSRegExp::Flags flags); // Associate the (source, kind) pair to the boilerplate. This may // overwrite an existing mapping. static void PutScript(Handle<String> source, Handle<JSFunction> boilerplate); // Associate the (source, context->closure()->shared(), kind) triple // with the boilerplate. This may overwrite an existing mapping. static void PutEval(Handle<String> source, Handle<Context> context, Entry entry, Handle<JSFunction> boilerplate); // Associate the (source, flags) pair to the given regexp data. // This may overwrite an existing mapping. static void PutRegExp(Handle<String> source, JSRegExp::Flags flags, Handle<FixedArray> data); // Clear the cache - also used to initialize the cache at startup. static void Clear(); // GC support. static void Iterate(ObjectVisitor* v); // Notify the cache that a mark-sweep garbage collection is about to // take place. This is used to retire entries from the cache to // avoid keeping them alive too long without using them. static void MarkCompactPrologue(); }; } } // namespace v8::internal #endif // V8_COMPILATION_CACHE_H_