1 /*
2 * Copyright (c) 2014, 2015, Dynatrace and/or its affiliates. All rights reserved.
3 *
4 * This file is part of the Lock Contention Tracing Subsystem for the HotSpot
5 * Virtual Machine, which is developed at Christian Doppler Laboratory on
6 * Monitoring and Evolution of Very-Large-Scale Software Systems. Please
7 * contact us at <http://mevss.jku.at/> if you need additional information
8 * or have any questions.
9 *
10 * This code is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License version 2 only, as
12 * published by the Free Software Foundation.
13 *
14 * This code is distributed in the hope that it will be useful, but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 * version 2 for more details (a copy is included in the LICENSE file that
18 * accompanied this code).
19 *
20 * You should have received a copy of the GNU General Public License version
21 * 2 along with this work. If not, see <http://www.gnu.org/licenses/>.
22 *
23 */
24
25 #ifndef SHARE_VM_EVTRACE_TRACEMETADATA_INLINE_HPP
26 #define SHARE_VM_EVTRACE_TRACEMETADATA_INLINE_HPP
27
28 #include "runtime/thread.hpp"
29 #include "runtime/objectMonitor.hpp"
30 #include "runtime/objectMonitor.inline.hpp"
31 #include "jvmtifiles/jvmtiEnv.hpp"
32
33 inline TraceTypes::timestamp TraceMetadata::time_now() {
34 return (TraceTypes::timestamp) os::javaTimeNanos();
35 }
36
37 inline TraceTypes::thread_id TraceMetadata::thread_id(Thread *t) {
38 assert(t != NULL, "thread is NULL");
39 if (t->is_Java_thread()) {
40 JavaThread *jt = (JavaThread *) t;
41 return (TraceTypes::thread_id) java_lang_Thread::thread_id(jt->threadObj());
42 }
43 return (TraceTypes::thread_id) -t->osthread()->thread_identifier();
44 }
45
46 inline TraceTypes::object_id TraceMetadata::object_id(oop obj) {
47 assert(obj != NULL, "object is NULL");
48 return (TraceTypes::object_id) obj->identity_hash();
49 }
50
51 inline TraceTypes::objmonitor_id TraceMetadata::objmonitor_id(ObjectMonitor* m) {
52 assert(m != NULL, "object monitor is NULL");
53 // NOTE: object monitors are native objects and are not moved by the garbage collector, so
54 // they can be identified by their address. However, monitors are allocated from pools and
55 // recycled after an object dies or on deflation. We must take this lifecycle into account
56 // when associating object monitors with objects.
57 return (TraceTypes::objmonitor_id) (intptr_t) m;
58 }
59
60 inline TraceTypes::object_id TraceMetadata::objmonitor_object_id(ObjectMonitor* m) {
61 assert(m != NULL, "object monitor is NULL");
62 if (m->header()->has_no_hash()) {
63 oop obj = (oop) m->object();
64 return (TraceTypes::object_id) obj->identity_hash();
65 }
66 return (TraceTypes::object_id) m->header()->hash();
67 }
68
69 inline TraceTypes::thread_state TraceMetadata::thread_state(Thread *t) {
70 assert(t != NULL, "thread is NULL");
71 assert(t->is_Java_thread(), "only Java threads supported");
72
73 // just use JVMTI thread states
74 JavaThread *jt = (JavaThread *) t;
75 TraceTypes::thread_state state = 0;
76 if (jt->threadObj() != NULL) { // provides most state bits
77 state = (TraceTypes::thread_state) java_lang_Thread::get_thread_status(jt->threadObj());
78 }
79 // additional state bits
80 if (jt->is_ext_suspended() || jt->is_external_suspend()) { // same as is_being_ext_suspended() but without locking
81 state |= JVMTI_THREAD_STATE_SUSPENDED;
82 }
83 JavaThreadState jts = jt->thread_state();
84 if (jts == _thread_in_native) {
85 state |= JVMTI_THREAD_STATE_IN_NATIVE;
86 }
87 OSThread* osThread = jt->osthread();
88 if (osThread != NULL && osThread->interrupted()) {
89 state |= JVMTI_THREAD_STATE_INTERRUPTED;
90 }
91 return state;
92 }
93
94 inline TraceTypes::classloader_id TraceMetadata::classloader_id(ClassLoaderData* cld) {
95 return (TraceTypes::classloader_id) (intptr_t) cld;
96 }
97
98 inline TraceTypes::class_id TraceMetadata::class_id(Klass *klass, bool &added) {
99 added = false;
100 if (!klass->is_tracing_known()) {
101 added = klass->atomic_mark_tracing_known();
102 }
103 return (TraceTypes::class_id) (intptr_t) klass;
104 }
105
106 inline TraceTypes::method_id TraceMetadata::method_id(Method* method, bool& added) {
107 assert(method->method_holder()->is_tracing_known(), "klass must be known");
108
109 added = false;
110 if (!method->is_tracing_known()) {
111 added = method->atomic_mark_tracing_known();
112 }
113 return (TraceTypes::method_id) (intptr_t) method;
114 }
115
116 inline TraceTypes::stack_id TraceMetadata::next_stack_id() {
117 assert(EnableEventTracingStackTraces, "stack traces not enabled");
118 return (TraceTypes::stack_id) Atomic::add_ptr(1, &_last_stack_id);
119 }
120
121 inline TraceTypes::seq_num TraceMetadata::next_global_seq() {
122 return (TraceTypes::seq_num) Atomic::add_ptr(1, &_last_global_seq);
123 }
124
125 inline const CachedTraceStack * TraceMetadata::get_or_try_add_stack(CompositeTraceStack &ts, bool &known, TraceTypes::stack_id preallocated_id) {
126 return _stack_cache->get_or_try_add(ts, known, preallocated_id);
127 }
128
129 inline void TraceMetadata::purge_unloading_classes(ClassLoaderData *loader) {
130 _stack_cache->purge_unloading_classes(loader);
131 }
132
133 inline void TraceMetadata::purge_unloading_nmethod(const nmethod *nm) {
134 _stack_cache->purge_unloading_nmethod(nm);
135 }
136
137 #endif /* SHARE_VM_EVTRACE_TRACEMETADATA_INLINE_HPP */