Tue, 15 Nov 2011 20:17:33 +0100
7110152: assert(size_in_words <= (julong)max_jint) failed: no overflow
Summary: Reduce what arrayOopDesc::max_array_length() returns to avoid int overflow
Reviewed-by: kvn, dholmes, tonyp
1 /*
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25 #ifndef SHARE_VM_OOPS_INSTANCEREFKLASS_HPP
26 #define SHARE_VM_OOPS_INSTANCEREFKLASS_HPP
28 #include "oops/instanceKlass.hpp"
30 // An instanceRefKlass is a specialized instanceKlass for Java
31 // classes that are subclasses of java/lang/ref/Reference.
32 //
33 // These classes are used to implement soft/weak/final/phantom
34 // references and finalization, and need special treatment by the
35 // garbage collector.
36 //
37 // During GC discovered reference objects are added (chained) to one
38 // of the four lists below, depending on the type of reference.
39 // The linked occurs through the next field in class java/lang/ref/Reference.
40 //
41 // Afterwards, the discovered references are processed in decreasing
42 // order of reachability. Reference objects eligible for notification
43 // are linked to the static pending_list in class java/lang/ref/Reference,
44 // and the pending list lock object in the same class is notified.
47 class instanceRefKlass: public instanceKlass {
48 public:
49 // Type testing
50 bool oop_is_instanceRef() const { return true; }
52 // Casting from klassOop
53 static instanceRefKlass* cast(klassOop k) {
54 assert(k->klass_part()->oop_is_instanceRef(), "cast to instanceRefKlass");
55 return (instanceRefKlass*) k->klass_part();
56 }
58 // allocation
59 DEFINE_ALLOCATE_PERMANENT(instanceRefKlass);
61 // Garbage collection
62 int oop_adjust_pointers(oop obj);
63 void oop_follow_contents(oop obj);
65 // Parallel Scavenge and Parallel Old
66 PARALLEL_GC_DECLS
68 int oop_oop_iterate(oop obj, OopClosure* blk) {
69 return oop_oop_iterate_v(obj, blk);
70 }
71 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {
72 return oop_oop_iterate_v_m(obj, blk, mr);
73 }
75 #define InstanceRefKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \
76 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \
77 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, MemRegion mr);
79 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_DECL)
80 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_DECL)
82 #ifndef SERIALGC
83 #define InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \
84 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk);
86 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
87 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
88 #endif // !SERIALGC
90 static void release_and_notify_pending_list_lock(BasicLock *pending_list_basic_lock);
91 static void acquire_pending_list_lock(BasicLock *pending_list_basic_lock);
92 static bool owns_pending_list_lock(JavaThread* thread);
94 // Update non-static oop maps so 'referent', 'nextPending' and
95 // 'discovered' will look like non-oops
96 static void update_nonstatic_oop_maps(klassOop k);
98 public:
99 // Verification
100 void oop_verify_on(oop obj, outputStream* st);
101 };
103 #endif // SHARE_VM_OOPS_INSTANCEREFKLASS_HPP