src/share/vm/memory/genCollectedHeap.cpp

*** 604,614 ****
    // Don't process them if they will be processed during the ClassLoaderDataGraph phase.
    CLDClosure* roots_from_clds_p = (strong_cld_closure != weak_cld_closure) ? strong_cld_closure : NULL;
    // Only process code roots from thread stacks if we aren't visiting the entire CodeCache anyway
    CodeBlobClosure* roots_from_code_p = (so & SO_AllCodeCache) ? NULL : code_roots;
  
!   Threads::possibly_parallel_oops_do(strong_roots, roots_from_clds_p, roots_from_code_p);
  
    if (!_process_strong_tasks->is_task_claimed(GCH_PS_Universe_oops_do)) {
      Universe::oops_do(strong_roots);
    }
    // Global (strong) JNI handles
--- 604,615 ----
    // Don't process them if they will be processed during the ClassLoaderDataGraph phase.
    CLDClosure* roots_from_clds_p = (strong_cld_closure != weak_cld_closure) ? strong_cld_closure : NULL;
    // Only process code roots from thread stacks if we aren't visiting the entire CodeCache anyway
    CodeBlobClosure* roots_from_code_p = (so & SO_AllCodeCache) ? NULL : code_roots;
  
!   bool is_par = n_par_threads() > 0;
!   Threads::possibly_parallel_oops_do(is_par, strong_roots, roots_from_clds_p, roots_from_code_p);
  
    if (!_process_strong_tasks->is_task_claimed(GCH_PS_Universe_oops_do)) {
      Universe::oops_do(strong_roots);
    }
    // Global (strong) JNI handles