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// 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 shared function infos for compiled
// scripts and evals. The shared function infos are looked up using
// the source string as the key. For regular expressions the
// compilation data is cached.
class CompilationCache {
public:
// Finds the script shared function info 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<SharedFunctionInfo> LookupScript(Handle<String> source,
Handle<Object> name,
int line_offset,
int column_offset);
// Finds the shared function info 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<SharedFunctionInfo> LookupEval(Handle<String> source,
Handle<Context> context,
bool is_global);
// 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 shared function
// info. This may overwrite an existing mapping.
static void PutScript(Handle<String> source,
Handle<SharedFunctionInfo> function_info);
// Associate the (source, context->closure()->shared(), kind) triple
// with the shared function info. This may overwrite an existing mapping.
static void PutEval(Handle<String> source,
Handle<Context> context,
bool is_global,
Handle<SharedFunctionInfo> function_info);
// 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);
static void IterateFunctions(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();
// Enable/disable compilation cache. Used by debugger to disable compilation
// cache during debugging to make sure new scripts are always compiled.
static void Enable();
static void Disable();
};
} } // namespace v8::internal
#endif // V8_COMPILATION_CACHE_H_
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