V8。如何获取当前平台指针？

#include <iostream>
#include <v8.h>

int main() {
  v8::V8::InitializeICUDefaultLocation("");
  v8::V8::InitializeExternalStartupData("");
  v8::V8::InitializePlatform(v8::platform::CreateDefaultPlatform());
  v8::V8::Initialize();

  v8::Isolate* isolate = v8::Isolate::New();
  v8::Isolate::Scope isolate_scope(isolate);
  v8::HandleScope handle_scope(isolate);

  v8::Local<v8::Context> context = v8::Context::New(isolate);
  v8::Context::Scope context_scope(context);

  v8::Local<v8::Value> platform_pointer = v8::External::New(isolate, v8::platform::GetCurrentPlatform());
  std::cout << "当前平台指针: " << *reinterpret_cast<void**>(platform_pointer->ToObject(isolate)->GetAlignedPointerFromInternalField(0)) << std::endl;

  isolate->Dispose();
  v8::V8::Dispose();
  v8::V8::ShutdownPlatform();
  delete create_params.array_buffer_allocator;

  return 0;
}