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comparison src/share/vm/memory/space.cpp @ 20276:1526a938e670

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8047818: G1 HeapRegions can no longer be ContiguousSpaces Summary: Change parent of G1OffsetTableContigSpace to CompactibleSpace, reimplement missing functionality Reviewed-by: stefank, jmasa, tschatzl
author mgerdin
date Thu, 26 Jun 2014 11:36:58 +0200
parents ff1e37e7eb83
children ee019285a52c
comparison
equal deleted inserted replaced
20275:e5035defa3c4 20276:1526a938e670
682 } 682 }
683 683
684 // This version requires locking. 684 // This version requires locking.
685 inline HeapWord* ContiguousSpace::allocate_impl(size_t size, 685 inline HeapWord* ContiguousSpace::allocate_impl(size_t size,
686 HeapWord* const end_value) { 686 HeapWord* const end_value) {
687 // In G1 there are places where a GC worker can allocates into a
688 // region using this serial allocation code without being prone to a
689 // race with other GC workers (we ensure that no other GC worker can
690 // access the same region at the same time). So the assert below is
691 // too strong in the case of G1.
692 assert(Heap_lock->owned_by_self() || 687 assert(Heap_lock->owned_by_self() ||
693 (SafepointSynchronize::is_at_safepoint() && 688 (SafepointSynchronize::is_at_safepoint() && Thread::current()->is_VM_thread()),
694 (Thread::current()->is_VM_thread() || UseG1GC)),
695 "not locked"); 689 "not locked");
696 HeapWord* obj = top(); 690 HeapWord* obj = top();
697 if (pointer_delta(end_value, obj) >= size) { 691 if (pointer_delta(end_value, obj) >= size) {
698 HeapWord* new_top = obj + size; 692 HeapWord* new_top = obj + size;
699 set_top(new_top); 693 set_top(new_top);