hotspot source code - call java main method

vm/prims/jni.cpp 第1311行，jni_invoke_static()方法中第1329行通过JavaCalls::call()方法调用 Java 的main(String[])方法，源码如下：

static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
  methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));

  // Create object to hold arguments for the JavaCall, and associate it with
  // the jni parser
  ResourceMark rm(THREAD);
  int number_of_parameters = method->size_of_parameters();
  JavaCallArguments java_args(number_of_parameters);
  args->set_java_argument_object(&java_args);

  assert(method->is_static(), "method should be static");

  // Fill out JavaCallArguments object
  args->iterate( Fingerprinter(method).fingerprint() );
  // Initialize result type
  result->set_type(args->get_ret_type());

  // Invoke the method. Result is returned as oop.
  JavaCalls::call(result, method, &java_args, CHECK);

  // Convert result
  if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
    result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
  }
}

References

1. vm/prims/jni.cpp