1 /*
2 * Copyright (c) 2012, 2018, 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_RUNTIME_THREAD_INLINE_HPP
26 #define SHARE_VM_RUNTIME_THREAD_INLINE_HPP
27
28 #include "runtime/atomic.hpp"
29 #include "runtime/os.inline.hpp"
30 #include "runtime/thread.hpp"
31
32 inline void Thread::set_suspend_flag(SuspendFlags f) {
33 uint32_t flags;
34 do {
35 flags = _suspend_flags;
36 }
37 while (Atomic::cmpxchg((flags | f), &_suspend_flags, flags) != flags);
38 }
39 inline void Thread::clear_suspend_flag(SuspendFlags f) {
40 uint32_t flags;
41 do {
42 flags = _suspend_flags;
43 }
44 while (Atomic::cmpxchg((flags & ~f), &_suspend_flags, flags) != flags);
45 }
46
47 inline void Thread::set_has_async_exception() {
48 set_suspend_flag(_has_async_exception);
49 }
50 inline void Thread::clear_has_async_exception() {
51 clear_suspend_flag(_has_async_exception);
52 }
53 inline void Thread::set_critical_native_unlock() {
54 set_suspend_flag(_critical_native_unlock);
55 }
56 inline void Thread::clear_critical_native_unlock() {
57 clear_suspend_flag(_critical_native_unlock);
58 }
59 inline void Thread::set_trace_flag() {
60 set_suspend_flag(_trace_flag);
61 }
62 inline void Thread::clear_trace_flag() {
63 clear_suspend_flag(_trace_flag);
64 }
65
66 inline jlong Thread::cooked_allocated_bytes() {
67 jlong allocated_bytes = OrderAccess::load_acquire(&_allocated_bytes);
68 if (UseTLAB) {
69 size_t used_bytes = tlab().used_bytes();
70 if (used_bytes <= ThreadLocalAllocBuffer::max_size_in_bytes()) {
71 // Comparing used_bytes with the maximum allowed size will ensure
72 // that we don't add the used bytes from a semi-initialized TLAB
73 // ending up with incorrect values. There is still a race between
74 // incrementing _allocated_bytes and clearing the TLAB, that might
75 // cause double counting in rare cases.
76 return allocated_bytes + used_bytes;
77 }
78 }
79 return allocated_bytes;
80 }
81
82 inline ThreadsList* Thread::cmpxchg_threads_hazard_ptr(ThreadsList* exchange_value, ThreadsList* compare_value) {
83 return (ThreadsList*)Atomic::cmpxchg(exchange_value, &_threads_hazard_ptr, compare_value);
84 }
85
86 inline ThreadsList* Thread::get_threads_hazard_ptr() {
87 return (ThreadsList*)OrderAccess::load_acquire(&_threads_hazard_ptr);
88 }
89
90 inline void Thread::set_threads_hazard_ptr(ThreadsList* new_list) {
91 OrderAccess::release_store_fence(&_threads_hazard_ptr, new_list);
92 }
93
94 inline void JavaThread::set_ext_suspended() {
95 set_suspend_flag (_ext_suspended);
96 }
97 inline void JavaThread::clear_ext_suspended() {
98 clear_suspend_flag(_ext_suspended);
99 }
100
101 inline void JavaThread::set_external_suspend() {
102 set_suspend_flag(_external_suspend);
103 }
104 inline void JavaThread::clear_external_suspend() {
105 clear_suspend_flag(_external_suspend);
106 }
107
108 inline void JavaThread::set_deopt_suspend() {
109 set_suspend_flag(_deopt_suspend);
110 }
111 inline void JavaThread::clear_deopt_suspend() {
112 clear_suspend_flag(_deopt_suspend);
113 }
114
115 inline void JavaThread::set_pending_async_exception(oop e) {
116 _pending_async_exception = e;
117 _special_runtime_exit_condition = _async_exception;
118 set_has_async_exception();
119 }
120
121 #if defined(PPC64) || defined (AARCH64)
122 inline JavaThreadState JavaThread::thread_state() const {
123 return (JavaThreadState) OrderAccess::load_acquire((volatile jint*)&_thread_state);
124 }
125
126 inline void JavaThread::set_thread_state(JavaThreadState s) {
127 OrderAccess::release_store((volatile jint*)&_thread_state, (jint)s);
128 }
129 #endif
130
131 inline void JavaThread::set_done_attaching_via_jni() {
132 _jni_attach_state = _attached_via_jni;
133 OrderAccess::fence();
134 }
135
136 inline bool JavaThread::stack_guard_zone_unused() {
137 return _stack_guard_state == stack_guard_unused;
138 }
139
140 inline bool JavaThread::stack_yellow_reserved_zone_disabled() {
141 return _stack_guard_state == stack_guard_yellow_reserved_disabled;
142 }
143
144 inline bool JavaThread::stack_reserved_zone_disabled() {
145 return _stack_guard_state == stack_guard_reserved_disabled;
146 }
147
148 inline size_t JavaThread::stack_available(address cur_sp) {
149 // This code assumes java stacks grow down
150 address low_addr; // Limit on the address for deepest stack depth
151 if (_stack_guard_state == stack_guard_unused) {
152 low_addr = stack_end();
153 } else {
154 low_addr = stack_reserved_zone_base();
155 }
156 return cur_sp > low_addr ? cur_sp - low_addr : 0;
157 }
158
159 inline bool JavaThread::stack_guards_enabled() {
160 #ifdef ASSERT
161 if (os::uses_stack_guard_pages() &&
162 !(DisablePrimordialThreadGuardPages && os::is_primordial_thread())) {
163 assert(_stack_guard_state != stack_guard_unused, "guard pages must be in use");
164 }
165 #endif
166 return _stack_guard_state == stack_guard_enabled;
167 }
168
169 // The release make sure this store is done after storing the handshake
170 // operation or global state
171 inline void JavaThread::set_polling_page(void* poll_value) {
172 OrderAccess::release_store(polling_page_addr(), poll_value);
173 }
174
175 // The aqcquire make sure reading of polling page is done before
176 // the reading the handshake operation or the global state
177 inline volatile void* JavaThread::get_polling_page() {
178 return OrderAccess::load_acquire(polling_page_addr());
179 }
180
181 inline bool JavaThread::is_exiting() const {
182 // Use load-acquire so that setting of _terminated by
183 // JavaThread::exit() is seen more quickly.
184 TerminatedTypes l_terminated = (TerminatedTypes)
185 OrderAccess::load_acquire((volatile jint *) &_terminated);
186 return l_terminated == _thread_exiting || check_is_terminated(l_terminated);
187 }
188
189 inline bool JavaThread::is_terminated() const {
190 // Use load-acquire so that setting of _terminated by
191 // JavaThread::exit() is seen more quickly.
192 TerminatedTypes l_terminated = (TerminatedTypes)
193 OrderAccess::load_acquire((volatile jint *) &_terminated);
194 return check_is_terminated(l_terminated);
195 }
196
197 inline void JavaThread::set_terminated(TerminatedTypes t) {
198 // use release-store so the setting of _terminated is seen more quickly
199 OrderAccess::release_store((volatile jint *) &_terminated, (jint) t);
200 }
201
202 // special for Threads::remove() which is static:
203 inline void JavaThread::set_terminated_value() {
204 // use release-store so the setting of _terminated is seen more quickly
205 OrderAccess::release_store((volatile jint *) &_terminated, (jint) _thread_terminated);
206 }
207
208 #endif // SHARE_VM_RUNTIME_THREAD_INLINE_HPP