src/share/vm/gc_interface/collectedHeap.cpp

*** 54,63 ****
--- 54,66 ----
  int CollectedHeap::_fire_out_of_memory_count = 0;
  #endif
  
  size_t CollectedHeap::_filler_array_max_size = 0;
  
+ const char* CollectedHeap::OverflowMessage
+   = "The size of the object heap + perm gen exceeds the maximum representable size";
+ 
  template <>
  void EventLogBase<GCMessage>::print(outputStream* st, GCMessage& m) {
    st->print_cr("GC heap %s", m.is_before ? "before" : "after");
    st->print_raw(m);
  }
*** 178,187 ****
--- 181,210 ----
  #else
    assert(_defer_initial_card_mark == false, "Who would set it?");
  #endif
  }
  
+ size_t CollectedHeap::add_and_check_overflow(size_t total, size_t size) {
+   assert(size >= 0, "must be");
+   size_t result = total + size;
+   if (result < size) {
+     // We must have overflowed
+     vm_exit_during_initialization(CollectedHeap::OverflowMessage);
+   }
+   return result;
+ }
+ 
+ size_t CollectedHeap::round_up_and_check_overflow(size_t total, size_t size) {
+   assert(size >= 0, "must be");
+   size_t result = round_to(total, size);
+   if (result < size) {
+     // We must have overflowed
+     vm_exit_during_initialization(CollectedHeap::OverflowMessage);
+   }
+   return result;
+ }
+ 
  #ifndef PRODUCT
  void CollectedHeap::check_for_bad_heap_word_value(HeapWord* addr, size_t size) {
    if (CheckMemoryInitialization && ZapUnusedHeapArea) {
      for (size_t slot = 0; slot < size; slot += 1) {
        assert((*(intptr_t*) (addr + slot)) != ((intptr_t) badHeapWordVal),