1 /* |
1 /* |
2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * |
4 * |
5 * This code is free software; you can redistribute it and/or modify it |
5 * This code is free software; you can redistribute it and/or modify it |
6 * under the terms of the GNU General Public License version 2 only, as |
6 * under the terms of the GNU General Public License version 2 only, as |
7 * published by the Free Software Foundation. |
7 * published by the Free Software Foundation. |
25 #ifndef SHARE_VM_OOPS_INSTANCEREFKLASS_HPP |
25 #ifndef SHARE_VM_OOPS_INSTANCEREFKLASS_HPP |
26 #define SHARE_VM_OOPS_INSTANCEREFKLASS_HPP |
26 #define SHARE_VM_OOPS_INSTANCEREFKLASS_HPP |
27 |
27 |
28 #include "oops/instanceKlass.hpp" |
28 #include "oops/instanceKlass.hpp" |
29 |
29 |
30 // An instanceRefKlass is a specialized instanceKlass for Java |
30 // An instanceRefKlass is a specialized InstanceKlass for Java |
31 // classes that are subclasses of java/lang/ref/Reference. |
31 // classes that are subclasses of java/lang/ref/Reference. |
32 // |
32 // |
33 // These classes are used to implement soft/weak/final/phantom |
33 // These classes are used to implement soft/weak/final/phantom |
34 // references and finalization, and need special treatment by the |
34 // references and finalization, and need special treatment by the |
35 // garbage collector. |
35 // garbage collector. |
42 // order of reachability. Reference objects eligible for notification |
42 // order of reachability. Reference objects eligible for notification |
43 // are linked to the static pending_list in class java/lang/ref/Reference, |
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. |
44 // and the pending list lock object in the same class is notified. |
45 |
45 |
46 |
46 |
47 class instanceRefKlass: public instanceKlass { |
47 class instanceRefKlass: public InstanceKlass { |
|
48 friend class InstanceKlass; |
|
49 |
|
50 // Constructor |
|
51 instanceRefKlass(int vtable_len, int itable_len, int static_field_size, int nonstatic_oop_map_size, ReferenceType rt, AccessFlags access_flags, bool is_anonymous) |
|
52 : InstanceKlass(vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, access_flags, is_anonymous) {} |
|
53 |
48 public: |
54 public: |
|
55 instanceRefKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); } |
49 // Type testing |
56 // Type testing |
50 bool oop_is_instanceRef() const { return true; } |
57 bool oop_is_instanceRef() const { return true; } |
51 |
58 |
52 // Casting from klassOop |
59 // Casting from Klass* |
53 static instanceRefKlass* cast(klassOop k) { |
60 static instanceRefKlass* cast(Klass* k) { |
54 assert(k->klass_part()->oop_is_instanceRef(), "cast to instanceRefKlass"); |
61 assert(k->oop_is_instanceRef(), "cast to instanceRefKlass"); |
55 return (instanceRefKlass*) k->klass_part(); |
62 return (instanceRefKlass*) k; |
56 } |
63 } |
57 |
|
58 // allocation |
|
59 DEFINE_ALLOCATE_PERMANENT(instanceRefKlass); |
|
60 |
64 |
61 // Garbage collection |
65 // Garbage collection |
62 int oop_adjust_pointers(oop obj); |
66 int oop_adjust_pointers(oop obj); |
63 void oop_follow_contents(oop obj); |
67 void oop_follow_contents(oop obj); |
64 |
68 |
65 // Parallel Scavenge and Parallel Old |
69 // Parallel Scavenge and Parallel Old |
66 PARALLEL_GC_DECLS |
70 PARALLEL_GC_DECLS |
67 |
71 |
68 int oop_oop_iterate(oop obj, OopClosure* blk) { |
72 int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) { |
69 return oop_oop_iterate_v(obj, blk); |
73 return oop_oop_iterate_v(obj, blk); |
70 } |
74 } |
71 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) { |
75 int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) { |
72 return oop_oop_iterate_v_m(obj, blk, mr); |
76 return oop_oop_iterate_v_m(obj, blk, mr); |
73 } |
77 } |
74 |
78 |
75 #define InstanceRefKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ |
79 #define InstanceRefKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ |
76 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \ |
80 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \ |
91 static void acquire_pending_list_lock(BasicLock *pending_list_basic_lock); |
95 static void acquire_pending_list_lock(BasicLock *pending_list_basic_lock); |
92 static bool owns_pending_list_lock(JavaThread* thread); |
96 static bool owns_pending_list_lock(JavaThread* thread); |
93 |
97 |
94 // Update non-static oop maps so 'referent', 'nextPending' and |
98 // Update non-static oop maps so 'referent', 'nextPending' and |
95 // 'discovered' will look like non-oops |
99 // 'discovered' will look like non-oops |
96 static void update_nonstatic_oop_maps(klassOop k); |
100 static void update_nonstatic_oop_maps(Klass* k); |
97 |
101 |
98 public: |
102 public: |
99 // Verification |
103 // Verification |
100 void oop_verify_on(oop obj, outputStream* st); |
104 void oop_verify_on(oop obj, outputStream* st); |
101 }; |
105 }; |