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src/share/vm/gc_interface/collectedHeap.cpp

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 591   uintptr_t epsilon    = (uintptr_t) MinObjAlignment;
 592   uintptr_t heap_start = (uintptr_t) heap->_reserved.start();
 593   uintptr_t heap_end   = (uintptr_t) heap->_reserved.end();
 594 
 595   // Test that NULL is not in the heap.
 596   assert(!heap->is_in(NULL), "NULL is unexpectedly in the heap");
 597 
 598   // Test that a pointer to before the heap start is reported as outside the heap.
 599   assert(heap_start >= ((uintptr_t)NULL + epsilon), "sanity");
 600   void* before_heap = (void*)(heap_start - epsilon);
 601   assert(!heap->is_in(before_heap),
 602       err_msg("before_heap: " PTR_FORMAT " is unexpectedly in the heap", p2i(before_heap)));
 603 
 604   // Test that a pointer to after the heap end is reported as outside the heap.
 605   assert(heap_end <= ((uintptr_t)-1 - epsilon), "sanity");
 606   void* after_heap = (void*)(heap_end + epsilon);
 607   assert(!heap->is_in(after_heap),
 608       err_msg("after_heap: " PTR_FORMAT " is unexpectedly in the heap", p2i(after_heap)));
 609 }
 610 #endif























 591   uintptr_t epsilon    = (uintptr_t) MinObjAlignment;
 592   uintptr_t heap_start = (uintptr_t) heap->_reserved.start();
 593   uintptr_t heap_end   = (uintptr_t) heap->_reserved.end();
 594 
 595   // Test that NULL is not in the heap.
 596   assert(!heap->is_in(NULL), "NULL is unexpectedly in the heap");
 597 
 598   // Test that a pointer to before the heap start is reported as outside the heap.
 599   assert(heap_start >= ((uintptr_t)NULL + epsilon), "sanity");
 600   void* before_heap = (void*)(heap_start - epsilon);
 601   assert(!heap->is_in(before_heap),
 602       err_msg("before_heap: " PTR_FORMAT " is unexpectedly in the heap", p2i(before_heap)));
 603 
 604   // Test that a pointer to after the heap end is reported as outside the heap.
 605   assert(heap_end <= ((uintptr_t)-1 - epsilon), "sanity");
 606   void* after_heap = (void*)(heap_end + epsilon);
 607   assert(!heap->is_in(after_heap),
 608       err_msg("after_heap: " PTR_FORMAT " is unexpectedly in the heap", p2i(after_heap)));
 609 }
 610 #endif
 611 
 612 void CollectedHeap::shutdown() {
 613   // Default implementation does nothing.
 614 }
 615 
 616 void CollectedHeap::accumulate_statistics_all_gclabs() {
 617   // Default implementation does nothing.
 618 }
 619 
 620 bool CollectedHeap::supports_object_pinning() const {
 621   return false;
 622 }
 623 
 624 oop CollectedHeap::pin_object(JavaThread* thread, oop obj) {
 625   ShouldNotReachHere();
 626   return NULL;
 627 }
 628 
 629 void CollectedHeap::unpin_object(JavaThread* thread, oop obj) {
 630   ShouldNotReachHere();
 631 }
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