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