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comparison src/share/vm/oops/instanceRefKlass.hpp @ 6725:da91efe96a93

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6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author coleenp
date Sat, 01 Sep 2012 13:25:18 -0400
parents 7cf1a74771e8
children aed758eda82a
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6724:36d1d483d5d6 6725:da91efe96a93
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 };