1 /*
2 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
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
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_OOPS_INSTANCEREFKLASS_INLINE_HPP
26 #define SHARE_VM_OOPS_INSTANCEREFKLASS_INLINE_HPP
27
28 #include "classfile/javaClasses.inline.hpp"
29 #include "gc/shared/referenceProcessor.hpp"
30 #include "logging/log.hpp"
31 #include "oops/instanceKlass.inline.hpp"
32 #include "oops/instanceRefKlass.hpp"
33 #include "oops/oop.inline.hpp"
34 #include "utilities/debug.hpp"
35 #include "utilities/globalDefinitions.hpp"
36 #include "utilities/macros.hpp"
37
38 template <bool nv, typename T, class OopClosureType, class Contains>
39 void InstanceRefKlass::oop_oop_iterate_ref_processing_specialized(oop obj, OopClosureType* closure, Contains& contains) {
40 T* disc_addr = (T*)java_lang_ref_Reference::discovered_addr(obj);
41 if (closure->apply_to_weak_ref_discovered_field()) {
42 Devirtualizer<nv>::do_oop(closure, disc_addr);
43 }
44
45 T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj);
46 T heap_oop = oopDesc::load_heap_oop(referent_addr);
47 ReferenceProcessor* rp = closure->ref_processor();
48 if (!oopDesc::is_null(heap_oop)) {
49 oop referent = oopDesc::decode_heap_oop_not_null(heap_oop);
50 if (!referent->is_gc_marked() && (rp != NULL) &&
51 rp->discover_reference(obj, reference_type())) {
52 return;
53 } else if (contains(referent_addr)) {
54 // treat referent as normal oop
55 Devirtualizer<nv>::do_oop(closure, referent_addr);
56 }
57 }
58 T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj);
59 T next_oop = oopDesc::load_heap_oop(next_addr);
60 // Treat discovered as normal oop, if ref is not "active" (next non-NULL)
61 if (!oopDesc::is_null(next_oop) && contains(disc_addr)) {
62 // i.e. ref is not "active"
63 log_develop_trace(gc, ref)(" Process discovered as normal " PTR_FORMAT, p2i(disc_addr));
64 Devirtualizer<nv>::do_oop(closure, disc_addr);
65 }
66 // treat next as normal oop
67 if (contains(next_addr)) {
68 Devirtualizer<nv>::do_oop(closure, next_addr);
69 }
70 }
71
72 class AlwaysContains {
73 public:
74 template <typename T> bool operator()(T* p) const { return true; }
75 };
76
77 template <bool nv, class OopClosureType>
78 void InstanceRefKlass::oop_oop_iterate_ref_processing(oop obj, OopClosureType* closure) {
79 AlwaysContains always_contains;
80 if (UseCompressedOops) {
81 oop_oop_iterate_ref_processing_specialized<nv, narrowOop>(obj, closure, always_contains);
82 } else {
83 oop_oop_iterate_ref_processing_specialized<nv, oop>(obj, closure, always_contains);
84 }
85 }
86
87 class MrContains {
88 const MemRegion _mr;
89 public:
90 MrContains(MemRegion mr) : _mr(mr) {}
91 template <typename T> bool operator()(T* p) const { return _mr.contains(p); }
107
108 oop_oop_iterate_ref_processing<nv>(obj, closure);
109 }
110
111 #if INCLUDE_ALL_GCS
112 template <bool nv, class OopClosureType>
113 void InstanceRefKlass::oop_oop_iterate_reverse(oop obj, OopClosureType* closure) {
114 InstanceKlass::oop_oop_iterate_reverse<nv>(obj, closure);
115
116 oop_oop_iterate_ref_processing<nv>(obj, closure);
117 }
118 #endif // INCLUDE_ALL_GCS
119
120
121 template <bool nv, class OopClosureType>
122 void InstanceRefKlass::oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr) {
123 InstanceKlass::oop_oop_iterate_bounded<nv>(obj, closure, mr);
124
125 oop_oop_iterate_ref_processing_bounded<nv>(obj, closure, mr);
126 }
127
128 // Macro to define InstanceRefKlass::oop_oop_iterate for virtual/nonvirtual for
129 // all closures. Macros calling macros above for each oop size.
130 #define ALL_INSTANCE_REF_KLASS_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \
131 OOP_OOP_ITERATE_DEFN( InstanceRefKlass, OopClosureType, nv_suffix) \
132 OOP_OOP_ITERATE_DEFN_BOUNDED( InstanceRefKlass, OopClosureType, nv_suffix) \
133 OOP_OOP_ITERATE_DEFN_BACKWARDS(InstanceRefKlass, OopClosureType, nv_suffix)
134
135 #endif // SHARE_VM_OOPS_INSTANCEREFKLASS_INLINE_HPP
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1 /*
2 * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
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
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_OOPS_INSTANCEREFKLASS_INLINE_HPP
26 #define SHARE_VM_OOPS_INSTANCEREFKLASS_INLINE_HPP
27
28 #include "classfile/javaClasses.inline.hpp"
29 #include "gc/shared/referenceProcessor.hpp"
30 #include "logging/log.hpp"
31 #include "oops/instanceKlass.inline.hpp"
32 #include "oops/instanceRefKlass.hpp"
33 #include "oops/oop.inline.hpp"
34 #include "utilities/debug.hpp"
35 #include "utilities/globalDefinitions.hpp"
36 #include "utilities/macros.hpp"
37
38 template <bool nv, typename T, class OopClosureType, class Contains>
39 void InstanceRefKlass::do_referent(oop obj, OopClosureType* closure, Contains& contains) {
40 T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj);
41 if (contains(referent_addr)) {
42 Devirtualizer<nv>::do_oop(closure, referent_addr);
43 }
44 }
45
46 template <bool nv, typename T, class OopClosureType, class Contains>
47 void InstanceRefKlass::do_next(oop obj, OopClosureType* closure, Contains& contains) {
48 T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj);
49 if (contains(next_addr)) {
50 Devirtualizer<nv>::do_oop(closure, next_addr);
51 }
52 }
53
54 template <bool nv, typename T, class OopClosureType, class Contains>
55 void InstanceRefKlass::do_discovered(oop obj, OopClosureType* closure, Contains& contains) {
56 T* discovered_addr = (T*)java_lang_ref_Reference::discovered_addr(obj);
57 if (contains(discovered_addr)) {
58 log_develop_trace(gc, ref)(" Process discovered as normal " PTR_FORMAT, p2i(discovered_addr));
59 Devirtualizer<nv>::do_oop(closure, discovered_addr);
60 }
61 }
62
63 template <typename T, class OopClosureType>
64 bool InstanceRefKlass::try_discover(oop obj, ReferenceType type, OopClosureType* closure) {
65 ReferenceProcessor* rp = closure->ref_processor();
66 if (rp != NULL) {
67 T referent_oop = oopDesc::load_heap_oop((T*)java_lang_ref_Reference::referent_addr(obj));
68 if (!oopDesc::is_null(referent_oop)) {
69 oop referent = oopDesc::decode_heap_oop_not_null(referent_oop);
70 if (!referent->is_gc_marked()) {
71 // Only try to discover if not yet marked.
72 return rp->discover_reference(obj, type);
73 }
74 }
75 }
76 return false;
77 }
78
79 template <bool nv, typename T, class OopClosureType, class Contains>
80 void InstanceRefKlass::oop_oop_iterate_discovery(oop obj, ReferenceType type, OopClosureType* closure, Contains& contains) {
81 log_develop_trace(gc, ref)("Process reference with discovery " PTR_FORMAT, p2i(obj));
82
83 // Special case for some closures.
84 if (closure->apply_to_weak_ref_discovered_field()) {
85 do_discovered<nv, T>(obj, closure, contains);
86 }
87
88 // Try to discover reference and return if it succeeds.
89 if (try_discover<T>(obj, type, closure)) {
90 return;
91 }
92
93 // Treat referent as normal oop.
94 do_referent<nv, T>(obj, closure, contains);
95
96 // Treat discovered as normal oop, if ref is not "active" (next non-NULL).
97 T next_oop = oopDesc::load_heap_oop((T*)java_lang_ref_Reference::next_addr(obj));
98 if (!oopDesc::is_null(next_oop)) {
99 do_discovered<nv, T>(obj, closure, contains);
100 }
101
102 // Treat next as normal oop.
103 do_next<nv, T>(obj, closure, contains);
104 }
105
106 template <bool nv, typename T, class OopClosureType, class Contains>
107 void InstanceRefKlass::oop_oop_iterate_fields(oop obj, OopClosureType* closure, Contains& contains) {
108 do_referent<nv, T>(obj, closure, contains);
109 do_discovered<nv, T>(obj, closure, contains);
110 do_next<nv, T>(obj, closure, contains);
111 trace_reference_gc("InstanceRefKlass::oop_oop_iterate_fields()",
112 obj,
113 (T*)java_lang_ref_Reference::referent_addr(obj),
114 (T*)java_lang_ref_Reference::next_addr(obj),
115 (T*)java_lang_ref_Reference::discovered_addr(obj));
116 }
117
118 template <bool nv, typename T, class OopClosureType, class Contains>
119 void InstanceRefKlass::oop_oop_iterate_ref_processing_specialized(oop obj, OopClosureType* closure, Contains& contains) {
120 switch (closure->reference_iteration_mode()) {
121 case ExtendedOopClosure::DO_DISCOVERY:
122 oop_oop_iterate_discovery<nv, T>(obj, reference_type(), closure, contains);
123 break;
124 case ExtendedOopClosure::DO_FIELDS:
125 oop_oop_iterate_fields<nv, T>(obj, closure, contains);
126 break;
127 default:
128 ShouldNotReachHere();
129 }
130 }
131
132 class AlwaysContains {
133 public:
134 template <typename T> bool operator()(T* p) const { return true; }
135 };
136
137 template <bool nv, class OopClosureType>
138 void InstanceRefKlass::oop_oop_iterate_ref_processing(oop obj, OopClosureType* closure) {
139 AlwaysContains always_contains;
140 if (UseCompressedOops) {
141 oop_oop_iterate_ref_processing_specialized<nv, narrowOop>(obj, closure, always_contains);
142 } else {
143 oop_oop_iterate_ref_processing_specialized<nv, oop>(obj, closure, always_contains);
144 }
145 }
146
147 class MrContains {
148 const MemRegion _mr;
149 public:
150 MrContains(MemRegion mr) : _mr(mr) {}
151 template <typename T> bool operator()(T* p) const { return _mr.contains(p); }
167
168 oop_oop_iterate_ref_processing<nv>(obj, closure);
169 }
170
171 #if INCLUDE_ALL_GCS
172 template <bool nv, class OopClosureType>
173 void InstanceRefKlass::oop_oop_iterate_reverse(oop obj, OopClosureType* closure) {
174 InstanceKlass::oop_oop_iterate_reverse<nv>(obj, closure);
175
176 oop_oop_iterate_ref_processing<nv>(obj, closure);
177 }
178 #endif // INCLUDE_ALL_GCS
179
180
181 template <bool nv, class OopClosureType>
182 void InstanceRefKlass::oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr) {
183 InstanceKlass::oop_oop_iterate_bounded<nv>(obj, closure, mr);
184
185 oop_oop_iterate_ref_processing_bounded<nv>(obj, closure, mr);
186 }
187
188 #ifdef ASSERT
189 template <typename T>
190 void InstanceRefKlass::trace_reference_gc(const char *s, oop obj, T* referent_addr, T* next_addr, T* discovered_addr) {
191 log_develop_trace(gc, ref)("%s obj " PTR_FORMAT, s, p2i(obj));
192 log_develop_trace(gc, ref)(" referent_addr/* " PTR_FORMAT " / " PTR_FORMAT,
193 p2i(referent_addr), p2i(referent_addr ? (address)oopDesc::load_decode_heap_oop(referent_addr) : NULL));
194 log_develop_trace(gc, ref)(" next_addr/* " PTR_FORMAT " / " PTR_FORMAT,
195 p2i(next_addr), p2i(next_addr ? (address)oopDesc::load_decode_heap_oop(next_addr) : NULL));
196 log_develop_trace(gc, ref)(" discovered_addr/* " PTR_FORMAT " / " PTR_FORMAT,
197 p2i(discovered_addr), p2i(discovered_addr ? (address)oopDesc::load_decode_heap_oop(discovered_addr) : NULL));
198 }
199 #endif
200
201 // Macro to define InstanceRefKlass::oop_oop_iterate for virtual/nonvirtual for
202 // all closures. Macros calling macros above for each oop size.
203 #define ALL_INSTANCE_REF_KLASS_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \
204 OOP_OOP_ITERATE_DEFN( InstanceRefKlass, OopClosureType, nv_suffix) \
205 OOP_OOP_ITERATE_DEFN_BOUNDED( InstanceRefKlass, OopClosureType, nv_suffix) \
206 OOP_OOP_ITERATE_DEFN_BACKWARDS(InstanceRefKlass, OopClosureType, nv_suffix)
207
208 #endif // SHARE_VM_OOPS_INSTANCEREFKLASS_INLINE_HPP
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