JavaScriptCore-7600.1.4.16.1.tar.gz

[apple/javascriptcore.git] / bytecode / EvalCodeCache.h

diff --git a/bytecode/EvalCodeCache.h b/bytecode/EvalCodeCache.h
index 2d6f7dc14636037b9078775f0177de272527448d..65deb94f069bcbb380f79141b7ab5f70bf510827 100644 (file)
--- a/bytecode/EvalCodeCache.h
+++ b/bytecode/EvalCodeCache.h
@@ -10,7 +10,7 @@
  * 2.  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.
- * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
  *     its contributors may be used to endorse or promote products derived
  *     from this software without specific prior written permission.
  *
@@ -29,56 +29,52 @@
 #ifndef EvalCodeCache_h
 #define EvalCodeCache_h
 
+#include "Executable.h"
 #include "JSGlobalObject.h"
-#include "Nodes.h"
-#include "Parser.h"
 #include "SourceCode.h"
-#include "UString.h"
 #include <wtf/HashMap.h>
 #include <wtf/RefPtr.h>
+#include <wtf/text/StringHash.h>
 
 namespace JSC {
 
+    class SlotVisitor;
+
     class EvalCodeCache {
     public:
-        PassRefPtr<EvalNode> get(ExecState* exec, const UString& evalSource, ScopeChainNode* scopeChain, JSValuePtr& exceptionValue)
+        EvalExecutable* tryGet(bool inStrictContext, const String& evalSource, JSScope* scope)
         {
-            RefPtr<EvalNode> evalNode;
-
-            if (evalSource.size() < maxCacheableSourceLength && (*scopeChain->begin())->isVariableObject())
-                evalNode = m_cacheMap.get(evalSource.rep());
-
-            if (!evalNode) {
-                int errorLine;
-                UString errorMessage;
-                
-                SourceCode source = makeSource(evalSource);
-                evalNode = exec->globalData().parser->parse<EvalNode>(exec, exec->dynamicGlobalObject()->debugger(), source, &errorLine, &errorMessage);
-                if (evalNode) {
-                    if (evalSource.size() < maxCacheableSourceLength && (*scopeChain->begin())->isVariableObject() && m_cacheMap.size() < maxCacheEntries)
-                        m_cacheMap.set(evalSource.rep(), evalNode);
-                } else {
-                    exceptionValue = Error::create(exec, SyntaxError, errorMessage, errorLine, source.provider()->asID(), 0);
-                    return 0;
-                }
-            }
+            if (!inStrictContext && evalSource.length() < maxCacheableSourceLength && scope->begin()->isVariableObject())
+                return m_cacheMap.get(evalSource.impl()).get();
+            return 0;
+        }
+        
+        EvalExecutable* getSlow(ExecState* exec, ScriptExecutable* owner, bool inStrictContext, const String& evalSource, JSScope* scope)
+        {
+            EvalExecutable* evalExecutable = EvalExecutable::create(exec, makeSource(evalSource), inStrictContext);
+            if (!evalExecutable)
+                return 0;
 
-            return evalNode.release();
+            if (!inStrictContext && evalSource.length() < maxCacheableSourceLength && scope->begin()->isVariableObject() && m_cacheMap.size() < maxCacheEntries)
+                m_cacheMap.set(evalSource.impl(), WriteBarrier<EvalExecutable>(exec->vm(), owner, evalExecutable));
+            
+            return evalExecutable;
         }
 
         bool isEmpty() const { return m_cacheMap.isEmpty(); }
 
-        void mark()
+        void visitAggregate(SlotVisitor&);
+
+        void clear()
         {
-            EvalCacheMap::iterator end = m_cacheMap.end();
-            for (EvalCacheMap::iterator ptr = m_cacheMap.begin(); ptr != end; ++ptr)
-                ptr->second->mark();
+            m_cacheMap.clear();
         }
+
     private:
-        static const int maxCacheableSourceLength = 256;
+        static const unsigned maxCacheableSourceLength = 256;
         static const int maxCacheEntries = 64;
 
-        typedef HashMap<RefPtr<UString::Rep>, RefPtr<EvalNode> > EvalCacheMap;
+        typedef HashMap<RefPtr<StringImpl>, WriteBarrier<EvalExecutable>> EvalCacheMap;
         EvalCacheMap m_cacheMap;
     };