*** old/src/share/vm/runtime/sweeper.cpp	Mon Nov 25 14:06:27 2013
--- new/src/share/vm/runtime/sweeper.cpp	Mon Nov 25 14:06:27 2013

*** 254,266 ****
--- 254,268 ----
    //                                              As a result, we invoke the sweeper after
    //                                              15 invocations of 'mark_active_nmethods.
    // Large ReservedCodeCacheSize:   (e.g., 256M + code Cache is 90% full). The formula
    //                                              computes: (256 / 16) - 10 = 6.
    if (!_should_sweep) {
!     const int time_since_last_sweep = _time_counter - _last_sweep;
      double wait_until_next_sweep = (ReservedCodeCacheSize / (16 * M)) - time_since_last_sweep -
                                  CodeCache::reverse_free_ratio();
+     const int max_wait_time = ReservedCodeCacheSize / (16 * M);
+     // Use only signed types
+     double wait_until_next_sweep = max_wait_time - time_since_last_sweep - CodeCache::reverse_free_ratio();
+     assert(wait_until_next_sweep <= (double)max_wait_time, "Calculation of code cache sweeper interval is incorrect");
  
      if ((wait_until_next_sweep <= 0.0) || !CompileBroker::should_compile_new_jobs()) {
        _should_sweep = true;
      }
    }