1 /*
2 * Copyright (c) 2016, 2020, 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_JFR_RECORDER_CHECKPOINT_TYPES_TRACEID_JFRTRACEID_INLINE_HPP
26 #define SHARE_JFR_RECORDER_CHECKPOINT_TYPES_TRACEID_JFRTRACEID_INLINE_HPP
27
28 #include "classfile/classLoaderData.hpp"
29 #include "classfile/moduleEntry.hpp"
30 #include "classfile/packageEntry.hpp"
31 #include "jfr/recorder/checkpoint/types/traceid/jfrTraceId.hpp"
32 #include "jfr/recorder/checkpoint/types/traceid/jfrTraceIdBits.inline.hpp"
33 #include "jfr/recorder/checkpoint/types/traceid/jfrTraceIdEpoch.hpp"
34 #include "jfr/support/jfrKlassExtension.hpp"
35 #include "oops/arrayKlass.hpp"
36 #include "oops/klass.hpp"
37 #include "oops/instanceKlass.hpp"
38 #include "oops/method.hpp"
39 #include "runtime/thread.inline.hpp"
40 #include "utilities/debug.hpp"
41
42 inline bool is_not_tagged(traceid value) {
43 const traceid this_epoch_bit = JfrTraceIdEpoch::in_use_this_epoch_bit();
44 return (value & ((this_epoch_bit << META_SHIFT) | this_epoch_bit)) != this_epoch_bit;
45 }
46
47 template <typename T>
48 inline bool should_tag(const T* t) {
49 assert(t != NULL, "invariant");
50 return is_not_tagged(TRACE_ID_RAW(t));
51 }
52
53 template <>
54 inline bool should_tag<Method>(const Method* method) {
55 assert(method != NULL, "invariant");
56 return is_not_tagged((traceid)method->trace_flags());
57 }
58
59 template <typename T>
60 inline traceid set_used_and_get(const T* type) {
61 assert(type != NULL, "invariant");
62 if (should_tag(type)) {
63 SET_USED_THIS_EPOCH(type);
64 JfrTraceIdEpoch::set_changed_tag_state();
65 }
66 assert(USED_THIS_EPOCH(type), "invariant");
67 return TRACE_ID(type);
68 }
69
70 inline traceid JfrTraceId::get(const Klass* klass) {
71 assert(klass != NULL, "invariant");
72 return TRACE_ID(klass);
73 }
74
75 inline traceid JfrTraceId::get(const Thread* t) {
76 assert(t != NULL, "invariant");
77 return TRACE_ID_RAW(t->jfr_thread_local());
78 }
79
80 inline traceid JfrTraceId::use(const Klass* klass) {
81 assert(klass != NULL, "invariant");
82 if (should_tag(klass)) {
83 SET_USED_THIS_EPOCH(klass);
84 JfrTraceIdEpoch::set_changed_tag_state();
85 }
86 assert(USED_THIS_EPOCH(klass), "invariant");
87 return get(klass);
88 }
89
90 inline traceid JfrTraceId::use(const Method* method) {
91 return use(method->method_holder(), method);
92 }
93
94 inline traceid JfrTraceId::use(const Klass* klass, const Method* method) {
95 assert(klass != NULL, "invariant");
96 assert(method != NULL, "invariant");
97 if (METHOD_FLAG_NOT_USED_THIS_EPOCH(method)) {
98 SET_METHOD_AND_CLASS_USED_THIS_EPOCH(klass);
99 SET_METHOD_FLAG_USED_THIS_EPOCH(method);
100 assert(METHOD_AND_CLASS_USED_THIS_EPOCH(klass), "invariant");
101 assert(METHOD_FLAG_USED_THIS_EPOCH(method), "invariant");
102 JfrTraceIdEpoch::set_changed_tag_state();
103 }
104 return (METHOD_ID(klass, method));
105 }
106
107 inline traceid JfrTraceId::use(const ModuleEntry* module) {
108 return set_used_and_get(module);
109 }
110
111 inline traceid JfrTraceId::use(const PackageEntry* package) {
112 return set_used_and_get(package);
113 }
114
115 inline traceid JfrTraceId::use(const ClassLoaderData* cld) {
116 assert(cld != NULL, "invariant");
117 return cld->has_class_mirror_holder() ? 0 : set_used_and_get(cld);
118 }
119
120 inline void JfrTraceId::set_leakp(const Klass* klass, const Method* method) {
121 assert(klass != NULL, "invariant");
122 assert(METHOD_AND_CLASS_USED_THIS_EPOCH(klass), "invariant");
123 assert(method != NULL, "invariant");
124 assert(klass == method->method_holder(), "invariant");
125 if (METHOD_FLAG_NOT_USED_THIS_EPOCH(method)) {
126 // the method is already logically tagged, just like the klass,
127 // but because of redefinition, the latest Method*
128 // representation might not have a reified tag.
129 SET_METHOD_FLAG_USED_THIS_EPOCH(method);
130 assert(METHOD_FLAG_USED_THIS_EPOCH(method), "invariant");
131 }
132 SET_LEAKP(klass);
133 SET_METHOD_LEAKP(method);
134 }
135
136 inline bool JfrTraceId::in_visible_set(const Klass* klass) {
137 assert(klass != NULL, "invariant");
138 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_vm, "invariant");
139 return (IS_JDK_JFR_EVENT_SUBKLASS(klass) && !klass->is_abstract()) || IS_EVENT_HOST_KLASS(klass);
140 }
141
142 inline bool JfrTraceId::is_jdk_jfr_event(const Klass* k) {
143 assert(k != NULL, "invariant");
144 return IS_JDK_JFR_EVENT_KLASS(k);
145 }
146
147 inline void JfrTraceId::tag_as_jdk_jfr_event(const Klass* klass) {
148 assert(klass != NULL, "invariant");
149 SET_JDK_JFR_EVENT_KLASS(klass);
150 assert(IS_JDK_JFR_EVENT_KLASS(klass), "invariant");
151 }
152
153 inline bool JfrTraceId::is_jdk_jfr_event_sub(const Klass* k) {
154 assert(k != NULL, "invariant");
155 return IS_JDK_JFR_EVENT_SUBKLASS(k);
156 }
157
158 inline void JfrTraceId::tag_as_jdk_jfr_event_sub(const Klass* k) {
159 assert(k != NULL, "invariant");
160 if (IS_NOT_AN_EVENT_SUB_KLASS(k)) {
161 SET_JDK_JFR_EVENT_SUBKLASS(k);
162 }
163 assert(IS_JDK_JFR_EVENT_SUBKLASS(k), "invariant");
164 }
165
166 inline bool JfrTraceId::in_jdk_jfr_event_hierarchy(const Klass* klass) {
167 assert(klass != NULL, "invariant");
168 if (is_jdk_jfr_event(klass)) {
169 return true;
170 }
171 const Klass* const super = klass->super();
172 return super != NULL ? IS_EVENT_KLASS(super) : false;
173 }
174
175 inline bool JfrTraceId::is_event_host(const Klass* k) {
176 assert(k != NULL, "invariant");
177 return IS_EVENT_HOST_KLASS(k);
178 }
179
180 inline void JfrTraceId::tag_as_event_host(const Klass* k) {
181 assert(k != NULL, "invariant");
182 SET_EVENT_HOST_KLASS(k);
183 assert(IS_EVENT_HOST_KLASS(k), "invariant");
184 }
185
186 #endif // SHARE_JFR_RECORDER_CHECKPOINT_TYPES_TRACEID_JFRTRACEID_INLINE_HPP