Mercurial > hg > truffle

comparison src/share/vm/oops/oop.inline.hpp @ 344:6aae2f9d0294

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Merge
author ysr
date Thu, 12 Jun 2008 13:50:55 -0700
parents 37f87013dfd8 feeb96a45707
children 1ee8caae33af
comparison
equal deleted inserted replaced
342:37f87013dfd8 344:6aae2f9d0294
34 } 34 }
35 35
36 inline klassOop oopDesc::klass() const { 36 inline klassOop oopDesc::klass() const {
37 if (UseCompressedOops) { 37 if (UseCompressedOops) {
38 return (klassOop)decode_heap_oop_not_null(_metadata._compressed_klass); 38 return (klassOop)decode_heap_oop_not_null(_metadata._compressed_klass);
39 // can be NULL in CMS, but isn't supported on CMS yet. 39 } else {
40 return _metadata._klass;
41 }
42 }
43
44 inline klassOop oopDesc::klass_or_null() const volatile {
45 // can be NULL in CMS
46 if (UseCompressedOops) {
47 return (klassOop)decode_heap_oop(_metadata._compressed_klass);
40 } else { 48 } else {
41 return _metadata._klass; 49 return _metadata._klass;
42 } 50 }
43 } 51 }
44 52
62 inline void oopDesc::set_klass(klassOop k) { 70 inline void oopDesc::set_klass(klassOop k) {
63 // since klasses are promoted no store check is needed 71 // since klasses are promoted no store check is needed
64 assert(Universe::is_bootstrapping() || k != NULL, "must be a real klassOop"); 72 assert(Universe::is_bootstrapping() || k != NULL, "must be a real klassOop");
65 assert(Universe::is_bootstrapping() || k->is_klass(), "not a klassOop"); 73 assert(Universe::is_bootstrapping() || k->is_klass(), "not a klassOop");
66 if (UseCompressedOops) { 74 if (UseCompressedOops) {
67 // zero the gap when the klass is set, by zeroing the pointer sized
68 // part of the union.
69 _metadata._klass = NULL;
70 oop_store_without_check(compressed_klass_addr(), (oop)k); 75 oop_store_without_check(compressed_klass_addr(), (oop)k);
71 } else { 76 } else {
72 oop_store_without_check(klass_addr(), (oop) k); 77 oop_store_without_check(klass_addr(), (oop) k);
78 }
79 }
80
81 inline int oopDesc::klass_gap() const {
82 return *(int*)(((intptr_t)this) + klass_gap_offset_in_bytes());
83 }
84
85 inline void oopDesc::set_klass_gap(int v) {
86 if (UseCompressedOops) {
87 *(int*)(((intptr_t)this) + klass_gap_offset_in_bytes()) = v;
73 } 88 }
74 } 89 }
75 90
76 inline void oopDesc::set_klass_to_list_ptr(oop k) { 91 inline void oopDesc::set_klass_to_list_ptr(oop k) {
77 // This is only to be used during GC, for from-space objects, so no 92 // This is only to be used during GC, for from-space objects, so no
508 if (!Universe::heap()->is_in_reserved(obj)) return false; 523 if (!Universe::heap()->is_in_reserved(obj)) return false;
509 // obj is aligned and accessible in heap 524 // obj is aligned and accessible in heap
510 // try to find metaclass cycle safely without seg faulting on bad input 525 // try to find metaclass cycle safely without seg faulting on bad input
511 // we should reach klassKlassObj by following klass link at most 3 times 526 // we should reach klassKlassObj by following klass link at most 3 times
512 for (int i = 0; i < 3; i++) { 527 for (int i = 0; i < 3; i++) {
513 obj = obj->klass(); 528 obj = obj->klass_or_null();
514 // klass should be aligned and in permspace 529 // klass should be aligned and in permspace
515 if (!check_obj_alignment(obj)) return false; 530 if (!check_obj_alignment(obj)) return false;
516 if (!Universe::heap()->is_in_permanent(obj)) return false; 531 if (!Universe::heap()->is_in_permanent(obj)) return false;
517 } 532 }
518 if (obj != Universe::klassKlassObj()) { 533 if (obj != Universe::klassKlassObj()) {