webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 117 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/wasm/js/JSWebAssemblyInstance.h b/Source/JavaScriptCore/wasm/js/JSWebAssemblyInstance.h
new file mode 100644
index 000000000..99a2c90f7
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+++ b/Source/JavaScriptCore/wasm/js/JSWebAssemblyInstance.h
@@ -0,0 +1,117 @@
+/*
+ * 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(WEBASSEMBLY)
+
+#include "JSDestructibleObject.h"
+#include "JSObject.h"
+#include "JSWebAssemblyMemory.h"
+#include "JSWebAssemblyTable.h"
+
+namespace JSC {
+
+class JSModuleNamespaceObject;
+class JSWebAssemblyModule;
+
+class JSWebAssemblyInstance : public JSDestructibleObject {
+public:
+    typedef JSDestructibleObject Base;
+
+
+    static JSWebAssemblyInstance* create(VM&, Structure*, JSWebAssemblyModule*, JSModuleNamespaceObject*);
+    static Structure* createStructure(VM&, JSGlobalObject*, JSValue);
+
+    DECLARE_INFO;
+
+    JSWebAssemblyModule* module()
+    {
+        ASSERT(m_module);
+        return m_module.get();
+    }
+
+    WriteBarrier<JSCell>* importFunction(unsigned idx)
+    {
+        RELEASE_ASSERT(idx < m_numImportFunctions);
+        return &importFunctions()[idx];
+    }
+
+    WriteBarrier<JSCell>* importFunctions()
+    {
+        return bitwise_cast<WriteBarrier<JSCell>*>(bitwise_cast<char*>(this) + offsetOfImportFunctions());
+    }
+
+    void setImportFunction(VM& vm, JSCell* value, unsigned idx)
+    {
+        importFunction(idx)->set(vm, this, value);
+    }
+
+    JSWebAssemblyMemory* memory() { return m_memory.get(); }
+    void setMemory(VM& vm, JSWebAssemblyMemory* memory) { m_memory.set(vm, this, memory); }
+
+    JSWebAssemblyTable* table() { return m_table.get(); }
+    void setTable(VM& vm, JSWebAssemblyTable* table) { m_table.set(vm, this, table); }
+
+    int32_t loadI32Global(unsigned i) const { return m_globals.get()[i]; }
+    int64_t loadI64Global(unsigned i) const { return m_globals.get()[i]; }
+    float loadF32Global(unsigned i) const { return bitwise_cast<float>(loadI32Global(i)); }
+    double loadF64Global(unsigned i) const { return bitwise_cast<double>(loadI64Global(i)); }
+    void setGlobal(unsigned i, int64_t bits) { m_globals.get()[i] = bits; }
+
+    static size_t offsetOfImportFunction(unsigned idx)
+    {
+        return offsetOfImportFunctions() + sizeof(WriteBarrier<JSCell>) * idx;
+    }
+
+    static ptrdiff_t offsetOfMemory() { return OBJECT_OFFSETOF(JSWebAssemblyInstance, m_memory); }
+    static ptrdiff_t offsetOfTable() { return OBJECT_OFFSETOF(JSWebAssemblyInstance, m_table); }
+    static ptrdiff_t offsetOfGlobals() { return OBJECT_OFFSETOF(JSWebAssemblyInstance, m_globals); }
+    static size_t offsetOfImportFunctions() { return WTF::roundUpToMultipleOf<sizeof(WriteBarrier<JSCell>)>(sizeof(JSWebAssemblyInstance)); }
+    static size_t offsetOfImportFunction(size_t importFunctionNum) { return offsetOfImportFunctions() + importFunctionNum * sizeof(sizeof(WriteBarrier<JSCell>)); }
+
+protected:
+    JSWebAssemblyInstance(VM&, Structure*, unsigned numImportFunctions);
+    void finishCreation(VM&, JSWebAssemblyModule*, JSModuleNamespaceObject*);
+    static void destroy(JSCell*);
+    static void visitChildren(JSCell*, SlotVisitor&);
+
+    static size_t allocationSize(unsigned numImportFunctions)
+    {
+        return offsetOfImportFunctions() + sizeof(WriteBarrier<JSCell>) * numImportFunctions;
+    }
+
+private:
+    WriteBarrier<JSWebAssemblyModule> m_module;
+    WriteBarrier<JSModuleNamespaceObject> m_moduleNamespaceObject;
+    WriteBarrier<JSWebAssemblyMemory> m_memory;
+    WriteBarrier<JSWebAssemblyTable> m_table;
+    MallocPtr<uint64_t> m_globals;
+    unsigned m_numImportFunctions;
+};
+
+} // namespace JSC
+
+#endif // ENABLE(WEBASSEMBLY)