webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 160 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/wasm/js/WebAssemblyMemoryConstructor.cpp b/Source/JavaScriptCore/wasm/js/WebAssemblyMemoryConstructor.cpp
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+++ b/Source/JavaScriptCore/wasm/js/WebAssemblyMemoryConstructor.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 "WebAssemblyMemoryConstructor.h"
+
+#if ENABLE(WEBASSEMBLY)
+
+#include "FunctionPrototype.h"
+#include "JSCInlines.h"
+#include "JSWebAssemblyHelpers.h"
+#include "JSWebAssemblyMemory.h"
+#include "WasmMemory.h"
+#include "WasmPageCount.h"
+#include "WebAssemblyMemoryPrototype.h"
+#include <wtf/Optional.h>
+
+#include "WebAssemblyMemoryConstructor.lut.h"
+
+namespace JSC {
+
+const ClassInfo WebAssemblyMemoryConstructor::s_info = { "Function", &Base::s_info, &constructorTableWebAssemblyMemory, CREATE_METHOD_TABLE(WebAssemblyMemoryConstructor) };
+
+/* Source for WebAssemblyMemoryConstructor.lut.h
+ @begin constructorTableWebAssemblyMemory
+ @end
+ */
+
+static EncodedJSValue JSC_HOST_CALL constructJSWebAssemblyMemory(ExecState* exec)
+{
+    VM& vm = exec->vm();
+    auto throwScope = DECLARE_THROW_SCOPE(vm);
+    if (exec->argumentCount() != 1)
+        return JSValue::encode(throwException(exec, throwScope, createTypeError(exec, ASCIILiteral("WebAssembly.Memory expects exactly one argument"))));
+
+    JSObject* memoryDescriptor;
+    {
+        JSValue argument = exec->argument(0);
+        if (!argument.isObject())
+            return JSValue::encode(throwException(exec, throwScope, createTypeError(exec, ASCIILiteral("WebAssembly.Memory expects its first argument to be an object"))));
+        memoryDescriptor = jsCast<JSObject*>(argument);
+    }
+
+    Wasm::PageCount initialPageCount;
+    {
+        Identifier initial = Identifier::fromString(&vm, "initial");
+        JSValue minSizeValue = memoryDescriptor->get(exec, initial);
+        RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
+        uint32_t size = toNonWrappingUint32(exec, minSizeValue);
+        RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
+        if (!Wasm::PageCount::isValid(size))
+            return JSValue::encode(throwException(exec, throwScope, createRangeError(exec, ASCIILiteral("WebAssembly.Memory 'initial' page count is too large"))));
+        initialPageCount = Wasm::PageCount(size);
+    }
+
+    Wasm::PageCount maximumPageCount;
+    {
+        Identifier maximum = Identifier::fromString(&vm, "maximum");
+        bool hasProperty = memoryDescriptor->hasProperty(exec, maximum);
+        RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
+        if (hasProperty) {
+            JSValue maxSizeValue = memoryDescriptor->get(exec, maximum);
+            RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
+            uint32_t size = toNonWrappingUint32(exec, maxSizeValue);
+            RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
+            if (!Wasm::PageCount::isValid(size))
+                return JSValue::encode(throwException(exec, throwScope, createRangeError(exec, ASCIILiteral("WebAssembly.Memory 'maximum' page count is too large"))));
+            maximumPageCount = Wasm::PageCount(size);
+
+            if (initialPageCount > maximumPageCount) {
+                return JSValue::encode(throwException(exec, throwScope,
+                    createRangeError(exec, ASCIILiteral("'maximum' page count must be than greater than or equal to the 'initial' page count"))));
+            }
+        }
+    }
+
+    bool failed;
+    Wasm::Memory memory(initialPageCount, maximumPageCount, failed);
+    if (failed)
+        return JSValue::encode(throwException(exec, throwScope, createOutOfMemoryError(exec)));
+
+    return JSValue::encode(JSWebAssemblyMemory::create(vm, exec->lexicalGlobalObject()->WebAssemblyMemoryStructure(), WTFMove(memory)));
+}
+
+static EncodedJSValue JSC_HOST_CALL callJSWebAssemblyMemory(ExecState* state)
+{
+    VM& vm = state->vm();
+    auto throwScope = DECLARE_THROW_SCOPE(vm);
+    return JSValue::encode(throwConstructorCannotBeCalledAsFunctionTypeError(state, throwScope, "WebAssembly.Memory"));
+}
+
+WebAssemblyMemoryConstructor* WebAssemblyMemoryConstructor::create(VM& vm, Structure* structure, WebAssemblyMemoryPrototype* thisPrototype)
+{
+    auto* constructor = new (NotNull, allocateCell<WebAssemblyMemoryConstructor>(vm.heap)) WebAssemblyMemoryConstructor(vm, structure);
+    constructor->finishCreation(vm, thisPrototype);
+    return constructor;
+}
+
+Structure* WebAssemblyMemoryConstructor::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
+{
+    return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
+}
+
+void WebAssemblyMemoryConstructor::finishCreation(VM& vm, WebAssemblyMemoryPrototype* prototype)
+{
+    Base::finishCreation(vm, ASCIILiteral("Memory"));
+    putDirectWithoutTransition(vm, vm.propertyNames->prototype, prototype, DontEnum | DontDelete | ReadOnly);
+    putDirectWithoutTransition(vm, vm.propertyNames->length, jsNumber(1), ReadOnly | DontEnum | DontDelete);
+}
+
+WebAssemblyMemoryConstructor::WebAssemblyMemoryConstructor(VM& vm, Structure* structure)
+    : Base(vm, structure)
+{
+}
+
+ConstructType WebAssemblyMemoryConstructor::getConstructData(JSCell*, ConstructData& constructData)
+{
+    constructData.native.function = constructJSWebAssemblyMemory;
+    return ConstructType::Host;
+}
+
+CallType WebAssemblyMemoryConstructor::getCallData(JSCell*, CallData& callData)
+{
+    callData.native.function = callJSWebAssemblyMemory;
+    return CallType::Host;
+}
+
+void WebAssemblyMemoryConstructor::visitChildren(JSCell* cell, SlotVisitor& visitor)
+{
+    auto* thisObject = jsCast<WebAssemblyMemoryConstructor*>(cell);
+    ASSERT_GC_OBJECT_INHERITS(thisObject, info());
+    Base::visitChildren(thisObject, visitor);
+}
+
+} // namespace JSC
+
+#endif // ENABLE(WEBASSEMBLY)
+