Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/opto/library_call.cpp
src/share/vm/opto/library_call.cpp
- changeset 9703
- 2fdf635bcf28
- parent 9572
- 624a0741915c
- parent 9649
- b2000ea410b0
- child 9756
- 2be326848943
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| 9647:42d198677884 | 9703:2fdf635bcf28 |
|---|---|
| 2606 Node* adr; | 2606 Node* adr; |
| 2607 Node* heap_base_oop = top(); | 2607 Node* heap_base_oop = top(); |
| 2608 Node* offset = top(); | 2608 Node* offset = top(); |
| 2609 Node* val; | 2609 Node* val; |
| 2610 | 2610 |
| 2611 // The base is either a Java object or a value produced by Unsafe.staticFieldBase | |
| 2612 Node* base = argument(1); // type: oop | |
| 2613 | |
| 2611 if (!is_native_ptr) { | 2614 if (!is_native_ptr) { |
| 2612 // The base is either a Java object or a value produced by Unsafe.staticFieldBase | |
| 2613 Node* base = argument(1); // type: oop | |
| 2614 // The offset is a value produced by Unsafe.staticFieldOffset or Unsafe.objectFieldOffset | 2615 // The offset is a value produced by Unsafe.staticFieldOffset or Unsafe.objectFieldOffset |
| 2615 offset = argument(2); // type: long | 2616 offset = argument(2); // type: long |
| 2616 // We currently rely on the cookies produced by Unsafe.xxxFieldOffset | 2617 // We currently rely on the cookies produced by Unsafe.xxxFieldOffset |
| 2617 // to be plain byte offsets, which are also the same as those accepted | 2618 // to be plain byte offsets, which are also the same as those accepted |
| 2618 // by oopDesc::field_base. | 2619 // by oopDesc::field_base. |
| 2628 ptr = ConvL2X(ptr); // adjust Java long to machine word | 2629 ptr = ConvL2X(ptr); // adjust Java long to machine word |
| 2629 adr = make_unsafe_address(NULL, ptr); | 2630 adr = make_unsafe_address(NULL, ptr); |
| 2630 val = is_store ? argument(3) : NULL; | 2631 val = is_store ? argument(3) : NULL; |
| 2631 } | 2632 } |
| 2632 | 2633 |
| 2633 // Can base be NULL? Otherwise, always on-heap access. | 2634 if ((_gvn.type(base)->isa_ptr() == TypePtr::NULL_PTR) && type == T_OBJECT) { |
| 2634 bool can_access_non_heap = TypePtr::NULL_PTR->higher_equal(_gvn.type(heap_base_oop)); | |
| 2635 if (can_access_non_heap && type == T_OBJECT) { | |
| 2636 return false; // off-heap oop accesses are not supported | 2635 return false; // off-heap oop accesses are not supported |
| 2637 } | 2636 } |
| 2638 | 2637 |
| 2639 const TypePtr *adr_type = _gvn.type(adr)->isa_ptr(); | 2638 const TypePtr *adr_type = _gvn.type(adr)->isa_ptr(); |
| 2640 | 2639 |
