2457 // Ask Java code to find or construct a method handle constant.

  2458 Handle SystemDictionary::link_method_handle_constant(KlassHandle caller,

  2459                                                      int ref_kind, //e.g., JVM_REF_invokeVirtual

  2460                                                      KlassHandle callee,

  2461                                                      symbolHandle name_sym,

  2462                                                      symbolHandle signature,

  2463                                                      TRAPS) {

  2464   Handle empty;

  2465   Handle name = java_lang_String::create_from_symbol(name_sym(), CHECK_(empty));

  2466   Handle type;

  2467   if (signature->utf8_length() > 0 && signature->byte_at(0) == '(') {

  2468     bool ignore_is_on_bcp = false;

  2469     type = find_method_handle_type(signature, caller, ignore_is_on_bcp, CHECK_(empty));

  2470   } else {

  2471     SignatureStream ss(signature(), false);

  2472     if (!ss.is_done()) {

  2473       oop mirror = ss.as_java_mirror(caller->class_loader(), caller->protection_domain(),

  2474                                      SignatureStream::NCDFError, CHECK_(empty));

  2475       type = Handle(THREAD, mirror);

  2476       ss.next();

  2477       if (!ss.is_done())  type = Handle();  // error!

  2478     }

  2479   }

  2480   if (type.is_null()) {

  2481     THROW_MSG_(vmSymbols::java_lang_LinkageError(), "bad signature", empty);

  2482   }

  2483 

  2484   // call sun.dyn.MethodHandleNatives::linkMethodHandleConstant(Class caller, int refKind, Class callee, String name, Object type) -> MethodHandle

  2485   JavaCallArguments args;

  2486   args.push_oop(caller->java_mirror());  // the referring class

  2487   args.push_int(ref_kind);

  2488   args.push_oop(callee->java_mirror());  // the target class

  2489   args.push_oop(name());

  2490   args.push_oop(type());

  2491   JavaValue result(T_OBJECT);

  2492   JavaCalls::call_static(&result,

  2493                          SystemDictionary::MethodHandleNatives_klass(),

  2494                          vmSymbols::linkMethodHandleConstant_name(),

  2495                          vmSymbols::linkMethodHandleConstant_signature(),

  2496                          &args, CHECK_(empty));

  2497   return Handle(THREAD, (oop) result.get_jobject());

  2498 }