[ESNext] Implement DynamicImportCall

src/isolate.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/isolate.h"
 
 #include <stdlib.h>
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
@@ skipping 3327 matching lines @@
   v8::Isolate::SuppressMicrotaskExecutionScope suppress(isolate);
   for (int i = 0; i < call_completed_callbacks_.length(); i++) {
     call_completed_callbacks_.at(i)(isolate);
   }
 }
 
 void Isolate::DebugStateUpdated() {
   promise_hook_or_debug_is_active_ = promise_hook_ || debug()->is_active();
 }
 
+void Isolate::RunHostImportModuleDynamicallyCallback(
+    Handle<String> source_url, Handle<String> specifier,
+    Handle<JSPromise> promise) {
+  auto result = v8::Utils::PromiseToDynamicImportResult(promise);
+  if (host_import_module_dynamically_callback_ == nullptr) {
+    Handle<Object> exception =
+        factory()->NewError(error_function(), MessageTemplate::kUnsupported);
+    CHECK(result->FinishDynamicImportFailure(
+        v8::Utils::ToLocal(handle(context(), this)),
+        v8::Utils::ToLocal(exception)));
+    return;
+  }
+
+  host_import_module_dynamically_callback_(
+      reinterpret_cast<v8::Isolate*>(this), v8::Utils::ToLocal(source_url),
+      v8::Utils::ToLocal(specifier), result);
+}
+
+void Isolate::SetHostImportModuleDynamicallyCallback(
+    HostImportModuleDynamicallyCallback callback) {
+  host_import_module_dynamically_callback_ = callback;
+}
+
 void Isolate::SetPromiseHook(PromiseHook hook) {
   promise_hook_ = hook;
   DebugStateUpdated();
 }
 
 void Isolate::RunPromiseHook(PromiseHookType type, Handle<JSPromise> promise,
                              Handle<Object> parent) {
   if (debug()->is_active()) debug()->RunPromiseHook(type, promise, parent);
   if (promise_hook_ == nullptr) return;
   promise_hook_(type, v8::Utils::PromiseToLocal(promise),
@@ skipping 385 matching lines @@
   // Then check whether this scope intercepts.
   if ((flag & intercept_mask_)) {
     intercepted_flags_ |= flag;
     return true;
   }
   return false;
 }
 
 }  // namespace internal
 }  // namespace v8