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authorSimon Hausmann <simon.hausmann@nokia.com>2012-02-03 09:55:33 +0100
committerSimon Hausmann <simon.hausmann@nokia.com>2012-02-03 09:55:33 +0100
commitcd44dc59cdfc39534aef4d417e9f3c412e3be139 (patch)
tree8d89889ba95ed6ec9322e733846cc9cce9d7dff1 /Source/JavaScriptCore/interpreter/AbstractPC.h
parentd11f84f5b5cdc0d92a08af01b13472fdd5f9acb9 (diff)
downloadqtwebkit-cd44dc59cdfc39534aef4d417e9f3c412e3be139.tar.gz
Imported WebKit commit fce473cb4d55aa9fe9d0b0322a2fffecb731b961 (http://svn.webkit.org/repository/webkit/trunk@106560)
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+/*
+ * Copyright (C) 2012 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 AbstractPC_h
+#define AbstractPC_h
+
+#include "MacroAssemblerCodeRef.h"
+#include <wtf/Platform.h>
+
+namespace JSC {
+
+class JSGlobalData;
+class ExecState;
+struct Instruction;
+
+class AbstractPC {
+public:
+ AbstractPC()
+ : m_pointer(0)
+ , m_mode(None)
+ {
+ }
+
+ AbstractPC(JSGlobalData&, ExecState*);
+
+#if ENABLE(JIT)
+ AbstractPC(ReturnAddressPtr ptr)
+ : m_pointer(ptr.value())
+ , m_mode(JIT)
+ {
+ }
+
+ bool hasJITReturnAddress() const { return m_mode == JIT; }
+ ReturnAddressPtr jitReturnAddress() const
+ {
+ ASSERT(hasJITReturnAddress());
+ return ReturnAddressPtr(m_pointer);
+ }
+#endif
+
+#if ENABLE(INTERPRETER)
+ AbstractPC(Instruction* vPC)
+ : m_pointer(vPC)
+ , m_mode(Interpreter)
+ {
+ }
+
+ bool hasInterpreterReturnAddress() const { return m_mode == Interpreter; }
+ Instruction* interpreterReturnAddress() const
+ {
+ ASSERT(hasInterpreterReturnAddress());
+ return static_cast<Instruction*>(m_pointer);
+ }
+#endif
+
+ bool isSet() const { return m_mode != None; }
+ bool operator!() const { return !isSet(); }
+
+private:
+ void* m_pointer;
+
+ enum Mode { None, JIT, Interpreter };
+ Mode m_mode;
+};
+
+} // namespace JSC
+
+#endif // AbstractPC_h
+