JavaScriptCore-7601.1.46.3.tar.gz

[apple/javascriptcore.git] / debugger / DebuggerCallFrame.h

/*
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 *
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 *     notice, this list of conditions and the following disclaimer.
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 *     notice, this list of conditions and the following disclaimer in the
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 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
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#ifndef DebuggerCallFrame_h
#define DebuggerCallFrame_h

#include "DebuggerPrimitives.h"
#include "Strong.h"
#include <wtf/NakedPtr.h>
#include <wtf/PassRefPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/text/TextPosition.h>

namespace JSC {

class DebuggerScope;
class Exception;
class ExecState;
typedef ExecState CallFrame;

class DebuggerCallFrame : public RefCounted<DebuggerCallFrame> {
public:
    enum Type { ProgramType, FunctionType };

    static Ref<DebuggerCallFrame> create(CallFrame* callFrame)
    {
        return adoptRef(*new DebuggerCallFrame(callFrame));
    }

    JS_EXPORT_PRIVATE explicit DebuggerCallFrame(CallFrame*);

    JS_EXPORT_PRIVATE RefPtr<DebuggerCallFrame> callerFrame();
    ExecState* exec() const { return m_callFrame; }
    JS_EXPORT_PRIVATE SourceID sourceID() const;

    // line and column are in base 0 e.g. the first line is line 0.
    int line() const { return m_position.m_line.zeroBasedInt(); }
    int column() const { return m_position.m_column.zeroBasedInt(); }
    JS_EXPORT_PRIVATE const TextPosition& position() const { return m_position; }

    JS_EXPORT_PRIVATE JSGlobalObject* vmEntryGlobalObject() const;
    JS_EXPORT_PRIVATE DebuggerScope* scope();
    JS_EXPORT_PRIVATE String functionName() const;
    JS_EXPORT_PRIVATE Type type() const;
    JS_EXPORT_PRIVATE JSValue thisValue() const;
    JSValue evaluate(const String&, NakedPtr<Exception>&);

    bool isValid() const { return !!m_callFrame; }
    JS_EXPORT_PRIVATE void invalidate();

    // The following are only public for the Debugger's use only. They will be
    // made private soon. Other clients should not use these.

    JS_EXPORT_PRIVATE static TextPosition positionForCallFrame(CallFrame*);
    JS_EXPORT_PRIVATE static SourceID sourceIDForCallFrame(CallFrame*);
    static JSValue thisValueForCallFrame(CallFrame*);

private:
    CallFrame* m_callFrame;
    RefPtr<DebuggerCallFrame> m_caller;
    TextPosition m_position;
    // The DebuggerPausedScope is responsible for calling invalidate() which,
    // in turn, will clear this strong ref.
    Strong<DebuggerScope> m_scope;
};

} // namespace JSC

#endif // DebuggerCallFrame_h