JavaScriptCore-7601.1.46.3.tar.gz

[apple/javascriptcore.git] / runtime / Exception.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 Exception_h
+#define Exception_h
+
+#include "Interpreter.h"
+#include <wtf/RefCountedArray.h>
+
+namespace JSC {
+    
+class Exception : public JSNonFinalObject {
+public:
+    typedef JSNonFinalObject Base;
+    static const unsigned StructureFlags = StructureIsImmortal | Base::StructureFlags;
+
+    enum StackCaptureAction {
+        CaptureStack,
+        DoNotCaptureStack
+    };
+    JS_EXPORT_PRIVATE static Exception* create(VM&, JSValue thrownValue, StackCaptureAction = CaptureStack);
+
+    static const bool needsDestruction = true;
+    static void destroy(JSCell*);
+
+    static Structure* createStructure(VM&, JSGlobalObject*, JSValue prototype);
+
+    static void visitChildren(JSCell*, SlotVisitor&);
+
+    DECLARE_EXPORT_INFO;
+
+    static ptrdiff_t valueOffset()
+    {
+        return OBJECT_OFFSETOF(Exception, m_value);
+    }
+
+    JSValue value() const { return m_value.get(); }
+    const RefCountedArray<StackFrame>& stack() const { return m_stack; }
+
+    bool didNotifyInspectorOfThrow() const { return m_didNotifyInspectorOfThrow; }
+    void setDidNotifyInspectorOfThrow() { m_didNotifyInspectorOfThrow = true; }
+
+    ~Exception();
+
+private:
+    Exception(VM&);
+    void finishCreation(VM&, JSValue thrownValue, StackCaptureAction);
+
+    WriteBarrier<Unknown> m_value;
+    RefCountedArray<StackFrame> m_stack;
+    bool m_didNotifyInspectorOfThrow { false };
+
+    friend class LLIntOffsetsExtractor;
+};
+
+} // namespace JSC
+
+#endif // Exception_h