1011   // is plenty.
1012   address current = *native_function;
1013   if (current == function) return;
1014   if (post_event_flag && JvmtiExport::should_post_native_method_bind() &&
1015       function != nullptr) {
1016     // native_method_throw_unsatisfied_link_error_entry() should only
1017     // be passed when post_event_flag is false.
1018     assert(function !=
1019       SharedRuntime::native_method_throw_unsatisfied_link_error_entry(),
1020       "post_event_flag mismatch");
1021 
1022     // post the bind event, and possible change the bind function
1023     JvmtiExport::post_native_method_bind(this, &function);
1024   }
1025   *native_function = function;
1026   // This function can be called more than once. We must make sure that we always
1027   // use the latest registered method -> check if a stub already has been generated.
1028   // If so, we have to make it not_entrant.
1029   nmethod* nm = code(); // Put it into local variable to guard against concurrent updates
1030   if (nm != nullptr) {
1031     nm->make_not_entrant(nmethod::ChangeReason::set_native_function);
1032   }
1033 }
1034 
1035 
1036 bool Method::has_native_function() const {
1037   if (is_special_native_intrinsic())
1038     return false;  // special-cased in SharedRuntime::generate_native_wrapper
1039   address func = native_function();
1040   return (func != nullptr && func != SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
1041 }
1042 
1043 
1044 void Method::clear_native_function() {
1045   // Note: is_method_handle_intrinsic() is allowed here.
1046   set_native_function(
1047     SharedRuntime::native_method_throw_unsatisfied_link_error_entry(),
1048     !native_bind_event_is_interesting);
1049   this->unlink_code();
1050 }
1051 

1011   // is plenty.
1012   address current = *native_function;
1013   if (current == function) return;
1014   if (post_event_flag && JvmtiExport::should_post_native_method_bind() &&
1015       function != nullptr) {
1016     // native_method_throw_unsatisfied_link_error_entry() should only
1017     // be passed when post_event_flag is false.
1018     assert(function !=
1019       SharedRuntime::native_method_throw_unsatisfied_link_error_entry(),
1020       "post_event_flag mismatch");
1021 
1022     // post the bind event, and possible change the bind function
1023     JvmtiExport::post_native_method_bind(this, &function);
1024   }
1025   *native_function = function;
1026   // This function can be called more than once. We must make sure that we always
1027   // use the latest registered method -> check if a stub already has been generated.
1028   // If so, we have to make it not_entrant.
1029   nmethod* nm = code(); // Put it into local variable to guard against concurrent updates
1030   if (nm != nullptr) {
1031     nm->make_not_entrant(nmethod::InvalidationReason::SET_NATIVE_FUNCTION);
1032   }
1033 }
1034 
1035 
1036 bool Method::has_native_function() const {
1037   if (is_special_native_intrinsic())
1038     return false;  // special-cased in SharedRuntime::generate_native_wrapper
1039   address func = native_function();
1040   return (func != nullptr && func != SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
1041 }
1042 
1043 
1044 void Method::clear_native_function() {
1045   // Note: is_method_handle_intrinsic() is allowed here.
1046   set_native_function(
1047     SharedRuntime::native_method_throw_unsatisfied_link_error_entry(),
1048     !native_bind_event_is_interesting);
1049   this->unlink_code();
1050 }
1051