src/share/vm/gc_interface/collectedHeap.hpp

*** 90,99 ****
--- 90,101 ----
  #endif
  
    // Used for filler objects (static, but initialized in ctor).
    static size_t _filler_array_max_size;
  
+   const static char* OverflowMessage;
+ 
    GCHeapLog* _gc_heap_log;
  
    // Used in support of ReduceInitialCardMarks; only consulted if COMPILER2 is being used
    bool _defer_initial_card_mark;
  
*** 132,141 ****
--- 134,153 ----
    virtual void accumulate_statistics_all_tlabs();
  
    // Reinitialize tlabs before resuming mutators.
    virtual void resize_all_tlabs();
  
+   // Returns the sum of total and size if the sum does not overflow;
+   // Otherwise, call vm_exit_during_initialization().
+   // The overflow check is performed by comparing the result of the sum against size, which is assumed to be non-zero.
+   size_t add_and_check_overflow(size_t total, size_t size);
+ 
+   // Round up total against size and return the value, if the result does not overflow;
+   // Otherwise, call vm_exit_during_initialization().
+   // The overflow check is performed by comparing the round-up result against size, which is assumed to be non-zero.
+   size_t round_up_and_check_overflow(size_t total, size_t size);
+ 
    // Allocate from the current thread's TLAB, with broken-out slow path.
    inline static HeapWord* allocate_from_tlab(KlassHandle klass, Thread* thread, size_t size);
    static HeapWord* allocate_from_tlab_slow(KlassHandle klass, Thread* thread, size_t size);
  
    // Allocate an uninitialized block of the given size, or returns NULL if