1 files changed, 156 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/wasm/js/WebAssemblyModuleConstructor.cpp b/Source/JavaScriptCore/wasm/js/WebAssemblyModuleConstructor.cpp
new file mode 100644
index 000000000..81295923c
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+++ b/Source/JavaScriptCore/wasm/js/WebAssemblyModuleConstructor.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 "WebAssemblyModuleConstructor.h"
+
+#if ENABLE(WEBASSEMBLY)
+
+#include "ExceptionHelpers.h"
+#include "FunctionPrototype.h"
+#include "JSArrayBuffer.h"
+#include "JSCInlines.h"
+#include "JSTypedArrays.h"
+#include "JSWebAssemblyCallee.h"
+#include "JSWebAssemblyCompileError.h"
+#include "JSWebAssemblyHelpers.h"
+#include "JSWebAssemblyModule.h"
+#include "SymbolTable.h"
+#include "WasmPlan.h"
+#include "WebAssemblyModulePrototype.h"
+#include <wtf/StdLibExtras.h>
+
+#include "WebAssemblyModuleConstructor.lut.h"
+
+namespace JSC {
+
+const ClassInfo WebAssemblyModuleConstructor::s_info = { "Function", &Base::s_info, &constructorTableWebAssemblyModule, CREATE_METHOD_TABLE(WebAssemblyModuleConstructor) };
+
+/* Source for WebAssemblyModuleConstructor.lut.h
+ @begin constructorTableWebAssemblyModule
+ @end
+ */
+
+static EncodedJSValue JSC_HOST_CALL constructJSWebAssemblyModule(ExecState* exec)
+{
+    VM& vm = exec->vm();
+    auto throwScope = DECLARE_THROW_SCOPE(vm);
+    auto* structure = InternalFunction::createSubclassStructure(exec, exec->newTarget(), exec->lexicalGlobalObject()->WebAssemblyModuleStructure());
+    RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
+    throwScope.release();
+    return JSValue::encode(WebAssemblyModuleConstructor::createModule(exec, structure));
+}
+
+static EncodedJSValue JSC_HOST_CALL callJSWebAssemblyModule(ExecState* state)
+{
+    VM& vm = state->vm();
+    auto scope = DECLARE_THROW_SCOPE(vm);
+    return JSValue::encode(throwConstructorCannotBeCalledAsFunctionTypeError(state, scope, "WebAssembly.Module"));
+}
+
+JSValue WebAssemblyModuleConstructor::createModule(ExecState* state, Structure* structure)
+{
+    VM& vm = state->vm();
+    auto scope = DECLARE_THROW_SCOPE(vm);
+
+    size_t byteOffset;
+    size_t byteSize;
+    uint8_t* base = getWasmBufferFromValue(state, state->argument(0), byteOffset, byteSize);
+    RETURN_IF_EXCEPTION(scope, { });
+
+    Wasm::Plan plan(&vm, base + byteOffset, byteSize);
+    // On failure, a new WebAssembly.CompileError is thrown.
+    plan.run();
+    if (plan.failed())
+        return throwException(state, scope, createJSWebAssemblyCompileError(state, vm, plan.errorMessage()));
+
+    // On success, a new WebAssembly.Module object is returned with [[Module]] set to the validated Ast.module.
+
+    // The export symbol table is the same for all Instances of a Module.
+    SymbolTable* exportSymbolTable = SymbolTable::create(vm);
+    for (auto& exp : plan.exports()) {
+        auto offset = exportSymbolTable->takeNextScopeOffset(NoLockingNecessary);
+        exportSymbolTable->set(NoLockingNecessary, exp.field.impl(), SymbolTableEntry(VarOffset(offset)));
+    }
+
+    // Only wasm-internal functions have a callee, stubs to JS do not.
+    unsigned calleeCount = plan.internalFunctionCount();
+    JSWebAssemblyModule* result = JSWebAssemblyModule::create(vm, structure, plan.takeModuleInformation(), plan.takeCallLinkInfos(), plan.takeWasmExitStubs(), exportSymbolTable, calleeCount);
+    plan.initializeCallees(state->jsCallee()->globalObject(), 
+        [&] (unsigned calleeIndex, JSWebAssemblyCallee* jsEntrypointCallee, JSWebAssemblyCallee* wasmEntrypointCallee) {
+            result->setJSEntrypointCallee(vm, calleeIndex, jsEntrypointCallee);
+            result->setWasmEntrypointCallee(vm, calleeIndex, wasmEntrypointCallee);
+        });
+
+    return result;
+}
+
+WebAssemblyModuleConstructor* WebAssemblyModuleConstructor::create(VM& vm, Structure* structure, WebAssemblyModulePrototype* thisPrototype)
+{
+    auto* constructor = new (NotNull, allocateCell<WebAssemblyModuleConstructor>(vm.heap)) WebAssemblyModuleConstructor(vm, structure);
+    constructor->finishCreation(vm, thisPrototype);
+    return constructor;
+}
+
+Structure* WebAssemblyModuleConstructor::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
+{
+    return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
+}
+
+void WebAssemblyModuleConstructor::finishCreation(VM& vm, WebAssemblyModulePrototype* prototype)
+{
+    Base::finishCreation(vm, ASCIILiteral("Module"));
+    putDirectWithoutTransition(vm, vm.propertyNames->prototype, prototype, DontEnum | DontDelete | ReadOnly);
+    putDirectWithoutTransition(vm, vm.propertyNames->length, jsNumber(1), ReadOnly | DontEnum | DontDelete);
+}
+
+WebAssemblyModuleConstructor::WebAssemblyModuleConstructor(VM& vm, Structure* structure)
+    : Base(vm, structure)
+{
+}
+
+ConstructType WebAssemblyModuleConstructor::getConstructData(JSCell*, ConstructData& constructData)
+{
+    constructData.native.function = constructJSWebAssemblyModule;
+    return ConstructType::Host;
+}
+
+CallType WebAssemblyModuleConstructor::getCallData(JSCell*, CallData& callData)
+{
+    callData.native.function = callJSWebAssemblyModule;
+    return CallType::Host;
+}
+
+void WebAssemblyModuleConstructor::visitChildren(JSCell* cell, SlotVisitor& visitor)
+{
+    auto* thisObject = jsCast<WebAssemblyModuleConstructor*>(cell);
+    ASSERT_GC_OBJECT_INHERITS(thisObject, info());
+    Base::visitChildren(thisObject, visitor);
+}
+
+} // namespace JSC
+
+#endif // ENABLE(WEBASSEMBLY)
+