webkitgtk-2.12.3webkitgtk-2.12.3

1 files changed, 33 insertions, 80 deletions

diff --git a/Source/JavaScriptCore/runtime/CodeCache.h b/Source/JavaScriptCore/runtime/CodeCache.h
index f3ff7478d..2132f0c19 100644
--- a/Source/JavaScriptCore/runtime/CodeCache.h
+++ b/Source/JavaScriptCore/runtime/CodeCache.h
@@ -29,91 +29,34 @@
 #include "CodeSpecializationKind.h"
 #include "ParserModes.h"
 #include "SourceCode.h"
+#include "SourceCodeKey.h"
 #include "Strong.h"
-#include "WeakRandom.h"
+#include "VariableEnvironment.h"
 #include <wtf/CurrentTime.h>
 #include <wtf/Forward.h>
-#include <wtf/PassOwnPtr.h>
 #include <wtf/RandomNumber.h>
+#include <wtf/WeakRandom.h>
 #include <wtf/text/WTFString.h>
 
 namespace JSC {
 
 class EvalExecutable;
-class FunctionBodyNode;
+class FunctionMetadataNode;
 class Identifier;
 class JSScope;
+class ParserError;
 class ProgramExecutable;
+class ModuleProgramExecutable;
 class UnlinkedCodeBlock;
 class UnlinkedEvalCodeBlock;
+class UnlinkedModuleProgramCodeBlock;
 class UnlinkedFunctionCodeBlock;
 class UnlinkedFunctionExecutable;
 class UnlinkedProgramCodeBlock;
 class VM;
-struct ParserError;
 class SourceCode;
 class SourceProvider;
 
-class SourceCodeKey {
-public:
-    enum CodeType { EvalType, ProgramType, FunctionType };
-
-    SourceCodeKey()
-    {
-    }
-
-    SourceCodeKey(const SourceCode& sourceCode, const String& name, CodeType codeType, JSParserStrictness jsParserStrictness)
-        : m_sourceCode(sourceCode)
-        , m_name(name)
-        , m_flags((codeType << 1) | jsParserStrictness)
-        , m_hash(string().impl()->hash())
-    {
-    }
-
-    SourceCodeKey(WTF::HashTableDeletedValueType)
-        : m_sourceCode(WTF::HashTableDeletedValue)
-    {
-    }
-
-    bool isHashTableDeletedValue() const { return m_sourceCode.isHashTableDeletedValue(); }
-
-    unsigned hash() const { return m_hash; }
-
-    size_t length() const { return m_sourceCode.length(); }
-
-    bool isNull() const { return m_sourceCode.isNull(); }
-
-    // To save memory, we compute our string on demand. It's expected that source
-    // providers cache their strings to make this efficient.
-    String string() const { return m_sourceCode.toString(); }
-
-    bool operator==(const SourceCodeKey& other) const
-    {
-        return m_hash == other.m_hash
-            && length() == other.length()
-            && m_flags == other.m_flags
-            && m_name == other.m_name
-            && string() == other.string();
-    }
-
-private:
-    SourceCode m_sourceCode;
-    String m_name;
-    unsigned m_flags;
-    unsigned m_hash;
-};
-
-struct SourceCodeKeyHash {
-    static unsigned hash(const SourceCodeKey& key) { return key.hash(); }
-    static bool equal(const SourceCodeKey& a, const SourceCodeKey& b) { return a == b; }
-    static const bool safeToCompareToEmptyOrDeleted = false;
-};
-
-struct SourceCodeKeyHashTraits : SimpleClassHashTraits<SourceCodeKey> {
-    static const bool hasIsEmptyValueFunction = true;
-    static bool isEmptyValue(const SourceCodeKey& sourceCodeKey) { return sourceCodeKey.isNull(); }
-};
-
 struct SourceCodeValue {
     SourceCodeValue()
     {
@@ -145,18 +88,15 @@ public:
     {
     }
 
-    AddResult add(const SourceCodeKey& key, const SourceCodeValue& value)
+    SourceCodeValue* findCacheAndUpdateAge(const SourceCodeKey& key)
     {
         prune();
 
-        AddResult addResult = m_map.add(key, value);
-        if (addResult.isNewEntry) {
-            m_size += key.length();
-            m_age += key.length();
-            return addResult;
-        }
+        iterator findResult = m_map.find(key);
+        if (findResult == m_map.end())
+            return nullptr;
 
-        int64_t age = m_age - addResult.iterator->value.age;
+        int64_t age = m_age - findResult->value.age;
         if (age > m_capacity) {
             // A requested object is older than the cache's capacity. We can
             // infer that requested objects are subject to high eviction probability,
@@ -171,7 +111,20 @@ public:
                 m_capacity = m_minCapacity;
         }
 
-        addResult.iterator->value.age = m_age;
+        findResult->value.age = m_age;
+        m_age += key.length();
+
+        return &findResult->value;
+    }
+
+    AddResult addCache(const SourceCodeKey& key, const SourceCodeValue& value)
+    {
+        prune();
+
+        AddResult addResult = m_map.add(key, value);
+        ASSERT(addResult.isNewEntry);
+
+        m_size += key.length();
         m_age += key.length();
         return addResult;
     }
@@ -235,13 +188,15 @@ private:
 
 // Caches top-level code such as <script>, eval(), new Function, and JSEvaluateScript().
 class CodeCache {
+    WTF_MAKE_FAST_ALLOCATED;
 public:
-    static PassOwnPtr<CodeCache> create() { return adoptPtr(new CodeCache); }
+    CodeCache();
+    ~CodeCache();
 
-    UnlinkedProgramCodeBlock* getProgramCodeBlock(VM&, ProgramExecutable*, const SourceCode&, JSParserStrictness, DebuggerMode, ProfilerMode, ParserError&);
-    UnlinkedEvalCodeBlock* getEvalCodeBlock(VM&, EvalExecutable*, const SourceCode&, JSParserStrictness, DebuggerMode, ProfilerMode, ParserError&);
+    UnlinkedProgramCodeBlock* getProgramCodeBlock(VM&, ProgramExecutable*, const SourceCode&, JSParserBuiltinMode, JSParserStrictMode, DebuggerMode, ProfilerMode, ParserError&);
+    UnlinkedEvalCodeBlock* getEvalCodeBlock(VM&, EvalExecutable*, const SourceCode&, JSParserBuiltinMode, JSParserStrictMode, ThisTDZMode, bool, DebuggerMode, ProfilerMode, ParserError&, const VariableEnvironment*);
+    UnlinkedModuleProgramCodeBlock* getModuleProgramCodeBlock(VM&, ModuleProgramExecutable*, const SourceCode&, JSParserBuiltinMode, DebuggerMode, ProfilerMode, ParserError&);
     UnlinkedFunctionExecutable* getFunctionExecutableFromGlobalCode(VM&, const Identifier&, const SourceCode&, ParserError&);
-    ~CodeCache();
 
     void clear()
     {
@@ -249,10 +204,8 @@ public:
     }
 
 private:
-    CodeCache();
-
     template <class UnlinkedCodeBlockType, class ExecutableType> 
-    UnlinkedCodeBlockType* getGlobalCodeBlock(VM&, ExecutableType*, const SourceCode&, JSParserStrictness, DebuggerMode, ProfilerMode, ParserError&);
+    UnlinkedCodeBlockType* getGlobalCodeBlock(VM&, ExecutableType*, const SourceCode&, JSParserBuiltinMode, JSParserStrictMode, ThisTDZMode, bool, DebuggerMode, ProfilerMode, ParserError&, const VariableEnvironment*);
 
     CodeCacheMap m_sourceCode;
 };