src/share/vm/classfile/classLoaderData.cpp

*** 203,216 ****
      assert(k != k->next_link(), "no loops!");
    }
  }
  
  void ClassLoaderData::modules_do(void f(ModuleEntry*)) {
!   assert_locked_or_safepoint(Module_lock);
!   if (_modules != NULL) {
!     for (int i = 0; i < _modules->table_size(); i++) {
!       for (ModuleEntry* entry = _modules->bucket(i);
                                entry != NULL;
                                entry = entry->next()) {
          f(entry);
        }
      }
--- 203,217 ----
      assert(k != k->next_link(), "no loops!");
    }
  }
  
  void ClassLoaderData::modules_do(void f(ModuleEntry*)) {
!   // Lock-free access requires load_ptr_acquire
!   ModuleEntryTable* modules = load_ptr_acquire(&_modules);
!   if (modules != NULL) {
!     for (int i = 0; i < modules->table_size(); i++) {
!       for (ModuleEntry* entry = modules->bucket(i);
             entry != NULL;
             entry = entry->next()) {
          f(entry);
        }
      }