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/globals.hpp"
30 #include "runtime/orderAccess.hpp"
31 #include "runtime/os.inline.hpp"
32 #include "runtime/thread.hpp"
33
34 inline void Thread::set_suspend_flag(SuspendFlags f) {
35 uint32_t flags;
36 do {
37 flags = _suspend_flags;
38 }
39 while (Atomic::cmpxchg((flags | f), &_suspend_flags, flags) != flags);
40 }
41 inline void Thread::clear_suspend_flag(SuspendFlags f) {
42 uint32_t flags;
43 do {
44 flags = _suspend_flags;
45 }
46 while (Atomic::cmpxchg((flags & ~f), &_suspend_flags, flags) != flags);
47 }
48
49 inline void Thread::set_has_async_exception() {
50 set_suspend_flag(_has_async_exception);
51 }
52 inline void Thread::clear_has_async_exception() {
53 clear_suspend_flag(_has_async_exception);
54 }
55 inline void Thread::set_critical_native_unlock() {
56 set_suspend_flag(_critical_native_unlock);
57 }
58 inline void Thread::clear_critical_native_unlock() {
59 clear_suspend_flag(_critical_native_unlock);
60 }
61 inline void Thread::set_trace_flag() {
62 set_suspend_flag(_trace_flag);
63 }
64 inline void Thread::clear_trace_flag() {
65 clear_suspend_flag(_trace_flag);
66 }
67
68 inline jlong Thread::cooked_allocated_bytes() {
69 jlong allocated_bytes = OrderAccess::load_acquire(&_allocated_bytes);
70 if (UseTLAB) {
71 size_t used_bytes = tlab().used_bytes();
72 if (used_bytes <= ThreadLocalAllocBuffer::max_size_in_bytes()) {
73 // Comparing used_bytes with the maximum allowed size will ensure
74 // that we don't add the used bytes from a semi-initialized TLAB
75 // ending up with incorrect values. There is still a race between
76 // incrementing _allocated_bytes and clearing the TLAB, that might
77 // cause double counting in rare cases.
78 return allocated_bytes + used_bytes;
79 }
80 }
81 return allocated_bytes;
82 }
83
84 inline ThreadsList* Thread::cmpxchg_threads_hazard_ptr(ThreadsList* exchange_value, ThreadsList* compare_value) {
85 return (ThreadsList*)Atomic::cmpxchg(exchange_value, &_threads_hazard_ptr, compare_value);
86 }
87
88 inline ThreadsList* Thread::get_threads_hazard_ptr() {
89 return (ThreadsList*)OrderAccess::load_acquire(&_threads_hazard_ptr);
90 }
91
92 inline void Thread::set_threads_hazard_ptr(ThreadsList* new_list) {
93 OrderAccess::release_store_fence(&_threads_hazard_ptr, new_list);
94 }
95
96 inline void JavaThread::set_ext_suspended() {
97 set_suspend_flag (_ext_suspended);
98 }
99 inline void JavaThread::clear_ext_suspended() {
100 clear_suspend_flag(_ext_suspended);
101 }
102
103 inline void JavaThread::set_external_suspend() {
104 set_suspend_flag(_external_suspend);
105 }
106 inline void JavaThread::clear_external_suspend() {
107 clear_suspend_flag(_external_suspend);
108 }
109
110 inline void JavaThread::set_deopt_suspend() {
111 set_suspend_flag(_deopt_suspend);
112 }
113 inline void JavaThread::clear_deopt_suspend() {
114 clear_suspend_flag(_deopt_suspend);
115 }
116
117 inline void JavaThread::set_pending_async_exception(oop e) {
118 _pending_async_exception = e;
119 _special_runtime_exit_condition = _async_exception;
120 set_has_async_exception();
121 }
122
123 #if defined(PPC64) || defined (AARCH64)
124 inline JavaThreadState JavaThread::thread_state() const {
125 return (JavaThreadState) OrderAccess::load_acquire((volatile jint*)&_thread_state);
126 }
127
128 inline void JavaThread::set_thread_state(JavaThreadState s) {
129 OrderAccess::release_store((volatile jint*)&_thread_state, (jint)s);
130 }
131 #endif
132
133 inline void JavaThread::set_done_attaching_via_jni() {
134 _jni_attach_state = _attached_via_jni;
135 OrderAccess::fence();
136 }
137
138 inline bool JavaThread::stack_guard_zone_unused() {
139 return _stack_guard_state == stack_guard_unused;
140 }
141
142 inline bool JavaThread::stack_yellow_reserved_zone_disabled() {
143 return _stack_guard_state == stack_guard_yellow_reserved_disabled;
144 }
145
146 inline bool JavaThread::stack_reserved_zone_disabled() {
147 return _stack_guard_state == stack_guard_reserved_disabled;
148 }
149
150 inline size_t JavaThread::stack_available(address cur_sp) {
151 // This code assumes java stacks grow down
152 address low_addr; // Limit on the address for deepest stack depth
153 if (_stack_guard_state == stack_guard_unused) {
154 low_addr = stack_end();
155 } else {
156 low_addr = stack_reserved_zone_base();
157 }
158 return cur_sp > low_addr ? cur_sp - low_addr : 0;
159 }
160
161 inline bool JavaThread::stack_guards_enabled() {
162 #ifdef ASSERT
163 if (os::uses_stack_guard_pages() &&
164 !(DisablePrimordialThreadGuardPages && os::is_primordial_thread())) {
165 assert(_stack_guard_state != stack_guard_unused, "guard pages must be in use");
166 }
167 #endif
168 return _stack_guard_state == stack_guard_enabled;
169 }
170
171 // The release make sure this store is done after storing the handshake
172 // operation or global state
173 inline void JavaThread::set_polling_page(void* poll_value) {
174 OrderAccess::release_store(polling_page_addr(), poll_value);
175 }
176
177 // The aqcquire make sure reading of polling page is done before
178 // the reading the handshake operation or the global state
179 inline volatile void* JavaThread::get_polling_page() {
180 return OrderAccess::load_acquire(polling_page_addr());
181 }
182
183 inline bool JavaThread::is_exiting() const {
184 // Use load-acquire so that setting of _terminated by
185 // JavaThread::exit() is seen more quickly.
186 TerminatedTypes l_terminated = (TerminatedTypes)
187 OrderAccess::load_acquire((volatile jint *) &_terminated);
188 return l_terminated == _thread_exiting || check_is_terminated(l_terminated);
189 }
190
191 inline bool JavaThread::is_terminated() const {
192 // Use load-acquire so that setting of _terminated by
193 // JavaThread::exit() is seen more quickly.
194 TerminatedTypes l_terminated = (TerminatedTypes)
195 OrderAccess::load_acquire((volatile jint *) &_terminated);
196 return check_is_terminated(l_terminated);
197 }
198
199 inline void JavaThread::set_terminated(TerminatedTypes t) {
200 // use release-store so the setting of _terminated is seen more quickly
201 OrderAccess::release_store((volatile jint *) &_terminated, (jint) t);
202 }
203
204 // special for Threads::remove() which is static:
205 inline void JavaThread::set_terminated_value() {
206 // use release-store so the setting of _terminated is seen more quickly
207 OrderAccess::release_store((volatile jint *) &_terminated, (jint) _thread_terminated);
208 }
209
210 #endif // SHARE_VM_RUNTIME_THREAD_INLINE_HPP