JavaScriptCore-1097.3.3.tar.gz

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

diff --git a/bytecode/EvalCodeCache.h b/bytecode/EvalCodeCache.h
index f0ce73e9531263f30e1092f505d45e83c029ceaf..fba1d32f5ff03886493884186fbe330427d157d4 100644 (file)
--- a/bytecode/EvalCodeCache.h
+++ b/bytecode/EvalCodeCache.h
@@ -29,6 +29,7 @@
 #ifndef EvalCodeCache_h
 #define EvalCodeCache_h
 
+#include "Executable.h"
 #include "JSGlobalObject.h"
 #include "Nodes.h"
 #include "Parser.h"
@@ -36,49 +37,58 @@
 #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, JSValue& exceptionValue)
+        EvalExecutable* tryGet(bool inStrictContext, const UString& evalSource, ScopeChainNode* scopeChain)
         {
-            RefPtr<EvalNode> evalNode;
-
-            if (evalSource.size() < maxCacheableSourceLength && (*scopeChain->begin())->isVariableObject())
-                evalNode = m_cacheMap.get(evalSource.rep());
+            if (!inStrictContext && evalSource.length() < maxCacheableSourceLength && (*scopeChain->begin())->isVariableObject())
+                return m_cacheMap.get(evalSource.impl()).get();
+            return 0;
+        }
+        
+        EvalExecutable* getSlow(ExecState* exec, ScriptExecutable* owner, bool inStrictContext, const UString& evalSource, ScopeChainNode* scopeChain, JSValue& exceptionValue)
+        {
+            EvalExecutable* evalExecutable = EvalExecutable::create(exec, makeSource(evalSource), inStrictContext);
+            exceptionValue = evalExecutable->compile(exec, scopeChain);
+            if (exceptionValue)
+                return 0;
+            
+            if (!inStrictContext && evalSource.length() < maxCacheableSourceLength && (*scopeChain->begin())->isVariableObject() && m_cacheMap.size() < maxCacheEntries)
+                m_cacheMap.set(evalSource.impl(), WriteBarrier<EvalExecutable>(exec->globalData(), owner, evalExecutable));
+            
+            return evalExecutable;
+        }
+        
+        EvalExecutable* get(ExecState* exec, ScriptExecutable* owner, bool inStrictContext, const UString& evalSource, ScopeChainNode* scopeChain, JSValue& exceptionValue)
+        {
+            EvalExecutable* evalExecutable = tryGet(inStrictContext, evalSource, scopeChain);
 
-            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 (!evalExecutable)
+                evalExecutable = getSlow(exec, owner, inStrictContext, evalSource, scopeChain, exceptionValue);
 
-            return evalNode.release();
+            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;
     };