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
30 #include "prims/jvmtiThreadState.hpp"
31 #include "runtime/thread.inline.hpp"
32
33 // JvmtiEnvThreadStateIterator implementation
34
JvmtiEnvThreadStateIterator(JvmtiThreadState * thread_state)35 inline JvmtiEnvThreadStateIterator::JvmtiEnvThreadStateIterator(JvmtiThreadState* thread_state) {
36 state = thread_state;
37 Thread::current()->entering_jvmti_env_iteration();
38 }
39
~JvmtiEnvThreadStateIterator()40 inline JvmtiEnvThreadStateIterator::~JvmtiEnvThreadStateIterator() {
41 Thread::current()->leaving_jvmti_env_iteration();
42 }
43
first()44 inline JvmtiEnvThreadState* JvmtiEnvThreadStateIterator::first() {
45 return state->head_env_thread_state();
46 }
47
next(JvmtiEnvThreadState * ets)48 inline JvmtiEnvThreadState* JvmtiEnvThreadStateIterator::next(JvmtiEnvThreadState* ets) {
49 return ets->next();
50 }
51
52 // JvmtiThreadState implementation
53
env_thread_state(JvmtiEnvBase * env)54 JvmtiEnvThreadState* JvmtiThreadState::env_thread_state(JvmtiEnvBase *env) {
55 JvmtiEnvThreadStateIterator it(this);
56 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
57 if ((JvmtiEnvBase*)(ets->get_env()) == env) {
58 return ets;
59 }
60 }
61 return NULL;
62 }
63
head_env_thread_state()64 JvmtiEnvThreadState* JvmtiThreadState::head_env_thread_state() {
65 return _head_env_thread_state;
66 }
67
set_head_env_thread_state(JvmtiEnvThreadState * ets)68 void JvmtiThreadState::set_head_env_thread_state(JvmtiEnvThreadState* ets) {
69 _head_env_thread_state = ets;
70 }
71
state_for_while_locked(JavaThread * thread)72 inline JvmtiThreadState* JvmtiThreadState::state_for_while_locked(JavaThread *thread) {
73 assert(JvmtiThreadState_lock->is_locked(), "sanity check");
74
75 JvmtiThreadState *state = thread->jvmti_thread_state();
76 if (state == NULL) {
77 if (thread->is_exiting()) {
78 // don't add a JvmtiThreadState to a thread that is exiting
79 return NULL;
80 }
81
82 state = new JvmtiThreadState(thread);
83 }
84 return state;
85 }
86
state_for(JavaThread * thread)87 inline JvmtiThreadState* JvmtiThreadState::state_for(JavaThread *thread) {
88 JvmtiThreadState *state = thread->jvmti_thread_state();
89 if (state == NULL) {
90 MutexLocker mu(JvmtiThreadState_lock);
91 // check again with the lock held
92 state = state_for_while_locked(thread);
93 } else {
94 // Check possible safepoint even if state is non-null.
95 // (Note: the thread argument isn't the current thread)
96 DEBUG_ONLY(JavaThread::current()->check_possible_safepoint());
97 }
98 return state;
99 }
100
101 #endif // SHARE_PRIMS_JVMTITHREADSTATE_INLINE_HPP
102