Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 131 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/runtime/JSBoundFunction.cpp b/Source/JavaScriptCore/runtime/JSBoundFunction.cpp
new file mode 100644
index 000000000..549b6034f
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+++ b/Source/JavaScriptCore/runtime/JSBoundFunction.cpp
@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2011 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 "JSBoundFunction.h"
+
+#include "JSGlobalObject.h"
+
+namespace JSC {
+
+ASSERT_CLASS_FITS_IN_CELL(JSBoundFunction);
+ASSERT_HAS_TRIVIAL_DESTRUCTOR(JSBoundFunction);
+
+const ClassInfo JSBoundFunction::s_info = { "Function", &Base::s_info, 0, 0, CREATE_METHOD_TABLE(JSBoundFunction) };
+
+EncodedJSValue JSC_HOST_CALL boundFunctionCall(ExecState* exec)
+{
+    JSBoundFunction* boundFunction = static_cast<JSBoundFunction*>(exec->callee());
+
+    ASSERT(isJSArray(boundFunction->boundArgs())); // Currently this is true!
+    JSArray* boundArgs = asArray(boundFunction->boundArgs());
+
+    MarkedArgumentBuffer args;
+    for (unsigned i = 0; i < boundArgs->length(); ++i)
+        args.append(boundArgs->getIndex(i));
+    for (unsigned i = 0; i < exec->argumentCount(); ++i)
+        args.append(exec->argument(i));
+
+    JSObject* targetFunction = boundFunction->targetFunction();
+    CallData callData;
+    CallType callType = getCallData(targetFunction, callData);
+    ASSERT(callType != CallTypeNone);
+    return JSValue::encode(call(exec, targetFunction, callType, callData, boundFunction->boundThis(), args));
+}
+
+EncodedJSValue JSC_HOST_CALL boundFunctionConstruct(ExecState* exec)
+{
+    JSBoundFunction* boundFunction = static_cast<JSBoundFunction*>(exec->callee());
+
+    ASSERT(isJSArray(boundFunction->boundArgs())); // Currently this is true!
+    JSArray* boundArgs = asArray(boundFunction->boundArgs());
+
+    MarkedArgumentBuffer args;
+    for (unsigned i = 0; i < boundArgs->length(); ++i)
+        args.append(boundArgs->getIndex(i));
+    for (unsigned i = 0; i < exec->argumentCount(); ++i)
+        args.append(exec->argument(i));
+
+    JSObject* targetFunction = boundFunction->targetFunction();
+    ConstructData constructData;
+    ConstructType constructType = getConstructData(targetFunction, constructData);
+    ASSERT(constructType != ConstructTypeNone);
+    return JSValue::encode(construct(exec, targetFunction, constructType, constructData, args));
+}
+
+JSBoundFunction* JSBoundFunction::create(ExecState* exec, JSGlobalObject* globalObject, JSObject* targetFunction, JSValue boundThis, JSValue boundArgs, int length, const Identifier& name)
+{
+    ConstructData constructData;
+    ConstructType constructType = JSC::getConstructData(targetFunction, constructData);
+    bool canConstruct = constructType != ConstructTypeNone;
+
+    NativeExecutable* executable = exec->globalData().getHostFunction(boundFunctionCall, canConstruct ? boundFunctionConstruct : callHostFunctionAsConstructor);
+    JSBoundFunction* function = new (NotNull, allocateCell<JSBoundFunction>(*exec->heap())) JSBoundFunction(exec, globalObject, globalObject->boundFunctionStructure(), targetFunction, boundThis, boundArgs);
+
+    function->finishCreation(exec, executable, length, name);
+    return function;
+}
+
+bool JSBoundFunction::hasInstance(JSObject* object, ExecState* exec, JSValue value, JSValue)
+{
+    JSBoundFunction* thisObject = jsCast<JSBoundFunction*>(object);
+    // FIXME: our instanceof implementation will have already (incorrectly) performed
+    // a [[Get]] of .prototype from the bound function object, which is incorrect!
+    // https://bugs.webkit.org/show_bug.cgi?id=68656
+    JSValue proto = thisObject->m_targetFunction->get(exec, exec->propertyNames().prototype);
+    return thisObject->m_targetFunction->methodTable()->hasInstance(thisObject->m_targetFunction.get(), exec, value, proto);
+}
+
+JSBoundFunction::JSBoundFunction(ExecState* exec, JSGlobalObject* globalObject, Structure* structure, JSObject* targetFunction, JSValue boundThis, JSValue boundArgs)
+    : Base(exec, globalObject, structure)
+    , m_targetFunction(exec->globalData(), this, targetFunction)
+    , m_boundThis(exec->globalData(), this, boundThis)
+    , m_boundArgs(exec->globalData(), this, boundArgs)
+{
+}
+
+void JSBoundFunction::finishCreation(ExecState* exec, NativeExecutable* executable, int length, const Identifier& name)
+{
+    Base::finishCreation(exec, executable, length, name);
+    ASSERT(inherits(&s_info));
+
+    initializeGetterSetterProperty(exec, exec->propertyNames().arguments, globalObject()->throwTypeErrorGetterSetter(exec), DontDelete | DontEnum | Getter | Setter);
+    initializeGetterSetterProperty(exec, exec->propertyNames().caller, globalObject()->throwTypeErrorGetterSetter(exec), DontDelete | DontEnum | Getter | Setter);
+}
+
+void JSBoundFunction::visitChildren(JSCell* cell, SlotVisitor& visitor)
+{
+    JSBoundFunction* thisObject = jsCast<JSBoundFunction*>(cell);
+    ASSERT_GC_OBJECT_INHERITS(thisObject, &s_info);
+    COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag);
+    ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren());
+    Base::visitChildren(thisObject, visitor);
+
+    visitor.append(&thisObject->m_targetFunction);
+    visitor.append(&thisObject->m_boundThis);
+    visitor.append(&thisObject->m_boundArgs);
+}
+
+} // namespace JSC