1 /*
2 * Copyright (c) 2006, 2019, 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_PRIMS_JVMTITHREADSTATE_INLINE_HPP
26 #define SHARE_PRIMS_JVMTITHREADSTATE_INLINE_HPP
27
28 #include "prims/jvmtiEnvThreadState.hpp"
29 #include "prims/jvmtiThreadState.hpp"
30 #include "runtime/thread.inline.hpp"
31
32 // JvmtiEnvThreadStateIterator implementation
33
JvmtiEnvThreadStateIterator(JvmtiThreadState * thread_state)34 inline JvmtiEnvThreadStateIterator::JvmtiEnvThreadStateIterator(JvmtiThreadState* thread_state) {
35 state = thread_state;
36 Thread::current()->entering_jvmti_env_iteration();
37 }
38
~JvmtiEnvThreadStateIterator()39 inline JvmtiEnvThreadStateIterator::~JvmtiEnvThreadStateIterator() {
40 Thread::current()->leaving_jvmti_env_iteration();
41 }
42
first()43 inline JvmtiEnvThreadState* JvmtiEnvThreadStateIterator::first() {
44 return state->head_env_thread_state();
45 }
46
next(JvmtiEnvThreadState * ets)47 inline JvmtiEnvThreadState* JvmtiEnvThreadStateIterator::next(JvmtiEnvThreadState* ets) {
48 return ets->next();
49 }
50
51 // JvmtiThreadState implementation
52
env_thread_state(JvmtiEnvBase * env)53 JvmtiEnvThreadState* JvmtiThreadState::env_thread_state(JvmtiEnvBase *env) {
54 JvmtiEnvThreadStateIterator it(this);
55 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
56 if ((JvmtiEnvBase*)(ets->get_env()) == env) {
57 return ets;
58 }
59 }
60 return NULL;
61 }
62
head_env_thread_state()63 JvmtiEnvThreadState* JvmtiThreadState::head_env_thread_state() {
64 return _head_env_thread_state;
65 }
66
set_head_env_thread_state(JvmtiEnvThreadState * ets)67 void JvmtiThreadState::set_head_env_thread_state(JvmtiEnvThreadState* ets) {
68 _head_env_thread_state = ets;
69 }
70
state_for_while_locked(JavaThread * thread)71 inline JvmtiThreadState* JvmtiThreadState::state_for_while_locked(JavaThread *thread) {
72 assert(JvmtiThreadState_lock->is_locked(), "sanity check");
73
74 JvmtiThreadState *state = thread->jvmti_thread_state();
75 if (state == NULL) {
76 if (thread->is_exiting()) {
77 // don't add a JvmtiThreadState to a thread that is exiting
78 return NULL;
79 }
80
81 state = new JvmtiThreadState(thread);
82 }
83 return state;
84 }
85
state_for(JavaThread * thread)86 inline JvmtiThreadState* JvmtiThreadState::state_for(JavaThread *thread) {
87 JvmtiThreadState *state = thread->jvmti_thread_state();
88 if (state == NULL) {
89 MutexLocker mu(JvmtiThreadState_lock);
90 // check again with the lock held
91 state = state_for_while_locked(thread);
92 } else {
93 // Check possible safepoint even if state is non-null.
94 // (Note: the thread argument isn't the current thread)
95 DEBUG_ONLY(JavaThread::current()->check_possible_safepoint());
96 }
97 return state;
98 }
99
100 #endif // SHARE_PRIMS_JVMTITHREADSTATE_INLINE_HPP
101