JavaScriptCore-7601.1.46.3.tar.gz

[apple/javascriptcore.git] / runtime / FunctionRareData.h

diff --git a/runtime/FunctionRareData.h b/runtime/FunctionRareData.h
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+/*
+ * Copyright (C) 2015 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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 FunctionRareData_h
+#define FunctionRareData_h
+
+#include "JSCell.h"
+#include "ObjectAllocationProfile.h"
+#include "Watchpoint.h"
+
+namespace JSC {
+
+class JSGlobalObject;
+class LLIntOffsetsExtractor;
+namespace DFG {
+class SpeculativeJIT;
+class JITCompiler;
+}
+
+class FunctionRareData : public JSCell {
+    friend class JIT;
+    friend class DFG::SpeculativeJIT;
+    friend class DFG::JITCompiler;
+    friend class VM;
+    
+public:
+    typedef JSCell Base;
+    static const unsigned StructureFlags = StructureIsImmortal | Base::StructureFlags;
+
+    static FunctionRareData* create(VM&, JSObject* prototype, size_t inlineCapacity);
+
+    static const bool needsDestruction = true;
+    static void destroy(JSCell*);
+
+    static Structure* createStructure(VM&, JSGlobalObject*, JSValue prototype);
+
+    static void visitChildren(JSCell*, SlotVisitor&);
+
+    DECLARE_INFO;
+
+    static inline ptrdiff_t offsetOfAllocationProfile()
+    {
+        return OBJECT_OFFSETOF(FunctionRareData, m_allocationProfile);
+    }
+
+    ObjectAllocationProfile* allocationProfile()
+    {
+        return &m_allocationProfile;
+    }
+
+    Structure* allocationStructure() { return m_allocationProfile.structure(); }
+
+    InlineWatchpointSet& allocationProfileWatchpointSet()
+    {
+        return m_allocationProfileWatchpoint;
+    }
+
+    void clear(const char* reason);
+
+    void initialize(VM&, JSObject* prototype, size_t inlineCapacity);
+
+    bool isInitialized() { return !m_allocationProfile.isNull(); }
+
+protected:
+    FunctionRareData(VM&);
+    ~FunctionRareData();
+
+    void finishCreation(VM&, JSObject* prototype, size_t inlineCapacity);
+    using Base::finishCreation;
+
+private:
+
+    friend class LLIntOffsetsExtractor;
+
+    ObjectAllocationProfile m_allocationProfile;
+    InlineWatchpointSet m_allocationProfileWatchpoint;
+};
+
+} // namespace JSC
+
+#endif // FunctionRareData_h