1 files changed, 117 insertions, 0 deletions
diff --git a/src/bun.js/bindings/webcore/JSCallbackData.cpp b/src/bun.js/bindings/webcore/JSCallbackData.cpp
new file mode 100644
index 000000000..671f168f7
--- /dev/null
+++ b/src/bun.js/bindings/webcore/JSCallbackData.cpp
@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2007-2021 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.
+ * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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 "ZigGlobalObject.h"
+
+#include "JSCallbackData.h"
+
+#include "JSDOMBinding.h"
+// #include "JSExecState.h"
+// #include "JSExecStateInstrumentation.h"
+#include <JavaScriptCore/Exception.h>
+
+namespace WebCore {
+using namespace JSC;
+
+// https://webidl.spec.whatwg.org/#call-a-user-objects-operation
+JSValue JSCallbackData::invokeCallback(VM& vm, JSObject* callback, JSValue thisValue, MarkedArgumentBuffer& args, CallbackType method, PropertyName functionName, NakedPtr<JSC::Exception>& returnedException)
+{
+    ASSERT(callback);
+
+    // https://webidl.spec.whatwg.org/#ref-for-prepare-to-run-script makes callback's [[Realm]] a running JavaScript execution context,
+    // which is used for creating TypeError objects: https://tc39.es/ecma262/#sec-ecmascript-function-objects-call-thisargument-argumentslist (step 4).
+    JSGlobalObject* lexicalGlobalObject = callback->globalObject();
+    auto scope = DECLARE_CATCH_SCOPE(vm);
+
+    JSValue function;
+    CallData callData;
+
+    if (method != CallbackType::Object) {
+        function = callback;
+        callData = getCallData(callback);
+    }
+    if (callData.type == CallData::Type::None) {
+        if (method == CallbackType::Function) {
+            returnedException = JSC::Exception::create(vm, createTypeError(lexicalGlobalObject));
+            return JSValue();
+        }
+
+        ASSERT(!functionName.isNull());
+        function = callback->get(lexicalGlobalObject, functionName);
+        if (UNLIKELY(scope.exception())) {
+            returnedException = scope.exception();
+            scope.clearException();
+            return JSValue();
+        }
+
+        callData = getCallData(function);
+        if (callData.type == CallData::Type::None) {
+            returnedException = JSC::Exception::create(vm, createTypeError(lexicalGlobalObject, makeString("'", String(functionName.uid()), "' property of callback interface should be callable")));
+            return JSValue();
+        }
+
+        thisValue = callback;
+    }
+
+    ASSERT(!function.isEmpty());
+    ASSERT(callData.type != CallData::Type::None);
+
+    ScriptExecutionContext* context = jsCast<JSDOMGlobalObject*>(lexicalGlobalObject)->scriptExecutionContext();
+    // We will fail to get the context if the frame has been detached.
+    if (!context)
+        return JSValue();
+
+    // JSExecState::instrumentFunction(context, callData);
+
+    returnedException = nullptr;
+    JSValue result = JSC::profiledCall(lexicalGlobalObject, JSC::ProfilingReason::Other, function, callData, thisValue, args, returnedException);
+
+    // InspectorInstrumentation::didCallFunction(context);
+
+    return result;
+}
+
+template<typename Visitor>
+void JSCallbackDataWeak::visitJSFunction(Visitor& visitor)
+{
+    visitor.append(m_callback);
+}
+
+template void JSCallbackDataWeak::visitJSFunction(JSC::AbstractSlotVisitor&);
+template void JSCallbackDataWeak::visitJSFunction(JSC::SlotVisitor&);
+
+bool JSCallbackDataWeak::WeakOwner::isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown>, void* context, AbstractSlotVisitor& visitor, const char** reason)
+{
+    if (UNLIKELY(reason))
+        *reason = "Context is opaque root"; // FIXME: what is the context.
+    return visitor.containsOpaqueRoot(context);
+}
+
+} // namespace WebCore