474 

   475 /////////////// Unit tests ///////////////

   476 

   477 #ifndef PRODUCT

   478 void CollectedHeap::test_is_in() {

   479   CollectedHeap* heap = Universe::heap();

   480 

   481   // Test that NULL is not in the heap.

   482   assert(!heap->is_in(NULL), "NULL is unexpectedly in the heap");

   483 

   484   // Test that a pointer to before the heap start is reported as outside the heap.

   485   assert(heap->_reserved.start() >= (void*)MinObjAlignment, "sanity");

   486   void* before_heap = (void*)((intptr_t)heap->_reserved.start() - MinObjAlignment);

   487   assert(!heap->is_in(before_heap),

   488       err_msg("before_heap: " PTR_FORMAT " is unexpectedly in the heap", before_heap));

   489 

   490   // Test that a pointer to after the heap end is reported as outside the heap.

   491   assert(heap->_reserved.end() <= (void*)(uintptr_t(-1) - (uint)MinObjAlignment), "sanity");

   492   void* after_heap = (void*)((intptr_t)heap->_reserved.end() + MinObjAlignment);

   493   assert(!heap->is_in(after_heap),

   494       err_msg("after_heap: " PTR_FORMAT " is unexpectedly in the heap", after_heap));

   495 }

   496 #endif