Wed, 02 Jan 2013 20:28:09 -0500
8005494: SIGSEGV in Rewriter::relocate_and_link() when testing Weblogic with CompressedOops and KlassPtrs
Summary: Relocate functions with jsr's when rewriting so not repeated after reading shared archive
Reviewed-by: twisti, jrose
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25 #ifndef SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP
26 #define SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP
28 #ifndef SERIALGC
29 #include "gc_implementation/parNew/parNewGeneration.hpp"
30 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp"
31 #include "gc_implementation/parallelScavenge/psCompactionManager.hpp"
32 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp"
33 #include "gc_implementation/parallelScavenge/psScavenge.hpp"
34 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp"
35 #endif
37 inline void oopDesc::update_contents(ParCompactionManager* cm) {
38 // The klass field must be updated before anything else
39 // can be done.
40 DEBUG_ONLY(Klass* original_klass = klass());
42 Klass* new_klass = klass();
43 if (!new_klass->oop_is_typeArray()) {
44 // It might contain oops beyond the header, so take the virtual call.
45 new_klass->oop_update_pointers(cm, this);
46 }
47 // Else skip it. The TypeArrayKlass in the header never needs scavenging.
48 }
50 inline void oopDesc::follow_contents(ParCompactionManager* cm) {
51 assert (PSParallelCompact::mark_bitmap()->is_marked(this),
52 "should be marked");
53 klass()->oop_follow_contents(cm, this);
54 }
56 // Used by parallel old GC.
58 inline oop oopDesc::forward_to_atomic(oop p) {
59 assert(ParNewGeneration::is_legal_forward_ptr(p),
60 "illegal forwarding pointer value.");
61 markOop oldMark = mark();
62 markOop forwardPtrMark = markOopDesc::encode_pointer_as_mark(p);
63 markOop curMark;
65 assert(forwardPtrMark->decode_pointer() == p, "encoding must be reversable");
66 assert(sizeof(markOop) == sizeof(intptr_t), "CAS below requires this.");
68 while (!oldMark->is_marked()) {
69 curMark = (markOop)Atomic::cmpxchg_ptr(forwardPtrMark, &_mark, oldMark);
70 assert(is_forwarded(), "object should have been forwarded");
71 if (curMark == oldMark) {
72 return NULL;
73 }
74 // If the CAS was unsuccessful then curMark->is_marked()
75 // should return true as another thread has CAS'd in another
76 // forwarding pointer.
77 oldMark = curMark;
78 }
79 return forwardee();
80 }
82 inline void oopDesc::update_header(ParCompactionManager* cm) {
83 PSParallelCompact::adjust_klass(cm, klass());
84 }
86 #endif // SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP