webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 99 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/wasm/js/JSWebAssemblyInstance.cpp b/Source/JavaScriptCore/wasm/js/JSWebAssemblyInstance.cpp
new file mode 100644
index 000000000..fbc1cebfb
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+++ b/Source/JavaScriptCore/wasm/js/JSWebAssemblyInstance.cpp
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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.
+ */
+
+#include "config.h"
+#include "JSWebAssemblyInstance.h"
+
+#if ENABLE(WEBASSEMBLY)
+
+#include "AbstractModuleRecord.h"
+#include "JSCInlines.h"
+#include "JSModuleEnvironment.h"
+#include "JSModuleNamespaceObject.h"
+#include "JSWebAssemblyMemory.h"
+#include "JSWebAssemblyModule.h"
+#include <wtf/StdLibExtras.h>
+
+namespace JSC {
+
+JSWebAssemblyInstance* JSWebAssemblyInstance::create(VM& vm, Structure* structure, JSWebAssemblyModule* module, JSModuleNamespaceObject* moduleNamespaceObject)
+{
+    // FIXME: These objects could be pretty big we should try to throw OOM here.
+    auto* instance = new (NotNull, allocateCell<JSWebAssemblyInstance>(vm.heap, allocationSize(module->moduleInformation().importFunctionSignatureIndices.size()))) JSWebAssemblyInstance(vm, structure, module->moduleInformation().importFunctionSignatureIndices.size());
+    instance->finishCreation(vm, module, moduleNamespaceObject);
+    return instance;
+}
+
+Structure* JSWebAssemblyInstance::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
+{
+    return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
+}
+
+JSWebAssemblyInstance::JSWebAssemblyInstance(VM& vm, Structure* structure, unsigned numImportFunctions)
+    : Base(vm, structure)
+    , m_numImportFunctions(numImportFunctions)
+{
+    memset(importFunctions(), 0, m_numImportFunctions * sizeof(WriteBarrier<JSCell>));
+}
+
+void JSWebAssemblyInstance::finishCreation(VM& vm, JSWebAssemblyModule* module, JSModuleNamespaceObject* moduleNamespaceObject)
+{
+    Base::finishCreation(vm);
+    ASSERT(inherits(vm, info()));
+
+    const size_t extraMemorySize = module->moduleInformation().globals.size() * sizeof(Register);
+    m_globals = MallocPtr<uint64_t>::malloc(extraMemorySize);
+    heap()->reportExtraMemoryAllocated(extraMemorySize);
+
+    m_module.set(vm, this, module);
+    m_moduleNamespaceObject.set(vm, this, moduleNamespaceObject);
+    putDirect(vm, Identifier::fromString(&vm, "exports"), moduleNamespaceObject, None);
+}
+
+void JSWebAssemblyInstance::destroy(JSCell* cell)
+{
+    static_cast<JSWebAssemblyInstance*>(cell)->JSWebAssemblyInstance::~JSWebAssemblyInstance();
+}
+
+void JSWebAssemblyInstance::visitChildren(JSCell* cell, SlotVisitor& visitor)
+{
+    auto* thisObject = jsCast<JSWebAssemblyInstance*>(cell);
+    ASSERT_GC_OBJECT_INHERITS(thisObject, info());
+
+    Base::visitChildren(thisObject, visitor);
+    visitor.append(thisObject->m_module);
+    visitor.append(thisObject->m_moduleNamespaceObject);
+    visitor.append(thisObject->m_memory);
+    visitor.append(thisObject->m_table);
+    visitor.reportExtraMemoryVisited(thisObject->module()->moduleInformation().globals.size());
+    for (unsigned i = 0; i < thisObject->m_numImportFunctions; ++i)
+        visitor.append(*thisObject->importFunction(i));
+}
+
+const ClassInfo JSWebAssemblyInstance::s_info = { "WebAssembly.Instance", &Base::s_info, 0, CREATE_METHOD_TABLE(JSWebAssemblyInstance) };
+
+} // namespace JSC
+
+#endif // ENABLE(WEBASSEMBLY)