webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

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diff --git a/Source/JavaScriptCore/domjit/DOMJITPatchpoint.h b/Source/JavaScriptCore/domjit/DOMJITPatchpoint.h
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+++ b/Source/JavaScriptCore/domjit/DOMJITPatchpoint.h
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+/*
+ * Copyright (C) 2016 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.
+ */
+
+#pragma once
+
+#if ENABLE(JIT)
+
+#include "CCallHelpers.h"
+#include "RegisterSet.h"
+
+namespace JSC { namespace DOMJIT {
+
+class PatchpointParams;
+
+typedef CCallHelpers::JumpList PatchpointGeneratorFunction(CCallHelpers&, PatchpointParams&);
+typedef SharedTask<PatchpointGeneratorFunction> PatchpointGenerator;
+
+// DOMJIT patchpoint is the way to inject an opaque code generator into DFG and FTL.
+// While B3::Patchpoint is self-contained about its compilation information,
+// DOMJIT::Patchpoint depends on which DFG Node invokes. For example, CheckDOM will
+// link returned failureCases to BadType OSRExit, but this information is offered
+// from CheckDOM DFG Node, not from this patchpoint. This patchpoint mainly focuses
+// on injecting a snippet generator that can tell register usage and can be used
+// in both DFG and FTL.
+class Patchpoint : public ThreadSafeRefCounted<Patchpoint> {
+public:
+    static Ref<Patchpoint> create()
+    {
+        return adoptRef(*new Patchpoint());
+    }
+
+    template<typename Functor>
+    void setGenerator(const Functor& functor)
+    {
+        m_generator = createSharedTask<PatchpointGeneratorFunction>(functor);
+    }
+
+    RefPtr<PatchpointGenerator> generator() const { return m_generator; }
+
+    uint8_t numGPScratchRegisters { 0 };
+    uint8_t numFPScratchRegisters { 0 };
+
+protected:
+    Patchpoint() = default;
+
+private:
+    RefPtr<PatchpointGenerator> m_generator;
+};
+
+} }
+
+#endif