1 /* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation.
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9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
11 * version 2 for more details (a copy is included in the LICENSE file that
12 * accompanied this code).
13 *
14 * You should have received a copy of the GNU General Public License version
15 * 2 along with this work; if not, write to the Free Software Foundation,
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18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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22 */
23
24 #ifndef SHARE_VM_OOPS_INSTANCEMIRRORKLASS_INLINE_HPP
25 #define SHARE_VM_OOPS_INSTANCEMIRRORKLASS_INLINE_HPP
26
27 #include "classfile/javaClasses.hpp"
28 #include "oops/instanceKlass.inline.hpp"
29 #include "oops/instanceMirrorKlass.hpp"
30 #include "oops/klass.hpp"
31 #include "oops/oop.inline.hpp"
32 #include "utilities/debug.hpp"
33 #include "utilities/globalDefinitions.hpp"
34 #include "utilities/macros.hpp"
35
36 template <bool nv, typename T, class OopClosureType>
37 void InstanceMirrorKlass::oop_oop_iterate_statics_specialized(oop obj, OopClosureType* closure) {
38 T* p = (T*)start_of_static_fields(obj);
39 T* const end = p + java_lang_Class::static_oop_field_count(obj);
40
41 for (; p < end; ++p) {
42 Devirtualizer<nv>::do_oop(closure, p);
43 }
44 }
45
46 template <bool nv, class OopClosureType>
47 void InstanceMirrorKlass::oop_oop_iterate_statics(oop obj, OopClosureType* closure) {
48 if (UseCompressedOops) {
49 oop_oop_iterate_statics_specialized<nv, narrowOop>(obj, closure);
50 } else {
51 oop_oop_iterate_statics_specialized<nv, oop>(obj, closure);
52 }
53 }
54
55 template <bool nv, class OopClosureType>
56 void InstanceMirrorKlass::oop_oop_iterate(oop obj, OopClosureType* closure) {
57 InstanceKlass::oop_oop_iterate<nv>(obj, closure);
58
59 if (Devirtualizer<nv>::do_metadata(closure)) {
60 Klass* klass = java_lang_Class::as_Klass(obj);
61 // We'll get NULL for primitive mirrors.
62 if (klass != NULL) {
63 if (klass->is_instance_klass() && InstanceKlass::cast(klass)->is_anonymous()) {
64 // An anonymous class doesn't have its own class loader, so when handling
65 // the java mirror for an anonymous class we need to make sure its class
66 // loader data is claimed, this is done by calling do_cld explicitly.
67 // For non-anonymous classes the call to do_cld is made when the class
68 // loader itself is handled.
69 Devirtualizer<nv>::do_cld(closure, klass->class_loader_data());
70 } else {
71 Devirtualizer<nv>::do_klass(closure, klass);
72 }
73 } else {
74 // If klass is NULL then this a mirror for a primitive type.
75 // We don't have to follow them, since they are handled as strong
76 // roots in Universe::oops_do.
77 assert(java_lang_Class::is_primitive(obj), "Sanity check");
78 }
79 }
80
81 oop_oop_iterate_statics<nv>(obj, closure);
82 }
83
84 #if INCLUDE_ALL_GCS
85 template <bool nv, class OopClosureType>
86 void InstanceMirrorKlass::oop_oop_iterate_reverse(oop obj, OopClosureType* closure) {
87 InstanceKlass::oop_oop_iterate_reverse<nv>(obj, closure);
88
89 InstanceMirrorKlass::oop_oop_iterate_statics<nv>(obj, closure);
90 }
91 #endif
92
93 template <bool nv, typename T, class OopClosureType>
94 void InstanceMirrorKlass::oop_oop_iterate_statics_specialized_bounded(oop obj,
95 OopClosureType* closure,
96 MemRegion mr) {
97 T* p = (T*)start_of_static_fields(obj);
98 T* end = p + java_lang_Class::static_oop_field_count(obj);
99
100 T* const l = (T*)mr.start();
101 T* const h = (T*)mr.end();
102 assert(mask_bits((intptr_t)l, sizeof(T)-1) == 0 &&
103 mask_bits((intptr_t)h, sizeof(T)-1) == 0,
104 "bounded region must be properly aligned");
105
106 if (p < l) {
107 p = l;
108 }
109 if (end > h) {
110 end = h;
111 }
112
113 for (;p < end; ++p) {
114 Devirtualizer<nv>::do_oop(closure, p);
115 }
116 }
117
118 template <bool nv, class OopClosureType>
119 void InstanceMirrorKlass::oop_oop_iterate_statics_bounded(oop obj, OopClosureType* closure, MemRegion mr) {
120 if (UseCompressedOops) {
121 oop_oop_iterate_statics_specialized_bounded<nv, narrowOop>(obj, closure, mr);
122 } else {
123 oop_oop_iterate_statics_specialized_bounded<nv, oop>(obj, closure, mr);
124 }
125 }
126
127 template <bool nv, class OopClosureType>
128 void InstanceMirrorKlass::oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr) {
129 InstanceKlass::oop_oop_iterate_bounded<nv>(obj, closure, mr);
130
131 if (Devirtualizer<nv>::do_metadata(closure)) {
132 if (mr.contains(obj)) {
133 Klass* klass = java_lang_Class::as_Klass(obj);
134 // We'll get NULL for primitive mirrors.
135 if (klass != NULL) {
136 Devirtualizer<nv>::do_klass(closure, klass);
137 }
138 }
139 }
140
141 oop_oop_iterate_statics_bounded<nv>(obj, closure, mr);
142 }
143
144 #define ALL_INSTANCE_MIRROR_KLASS_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \
145 OOP_OOP_ITERATE_DEFN( InstanceMirrorKlass, OopClosureType, nv_suffix) \
146 OOP_OOP_ITERATE_DEFN_BOUNDED( InstanceMirrorKlass, OopClosureType, nv_suffix) \
147 OOP_OOP_ITERATE_DEFN_BACKWARDS(InstanceMirrorKlass, OopClosureType, nv_suffix)
148
149 #endif // SHARE_VM_OOPS_INSTANCEMIRRORKLASS_INLINE_HPP