1 /*
2 * Copyright (c) 2012, 2017, 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 assert(sizeof(jint) == sizeof(_suspend_flags), "size mismatch");
34 uint32_t flags;
35 do {
36 flags = _suspend_flags;
37 }
38 while (Atomic::cmpxchg((jint)(flags | f),
39 (volatile jint*)&_suspend_flags,
40 (jint)flags) != (jint)flags);
41 }
42 inline void Thread::clear_suspend_flag(SuspendFlags f) {
43 assert(sizeof(jint) == sizeof(_suspend_flags), "size mismatch");
44 uint32_t flags;
45 do {
46 flags = _suspend_flags;
47 }
48 while (Atomic::cmpxchg((jint)(flags & ~f),
49 (volatile jint*)&_suspend_flags,
50 (jint)flags) != (jint)flags);
51 }
52
53 inline void Thread::set_has_async_exception() {
54 set_suspend_flag(_has_async_exception);
55 }
56 inline void Thread::clear_has_async_exception() {
57 clear_suspend_flag(_has_async_exception);
58 }
59 inline void Thread::set_critical_native_unlock() {
60 set_suspend_flag(_critical_native_unlock);
61 }
62 inline void Thread::clear_critical_native_unlock() {
63 clear_suspend_flag(_critical_native_unlock);
64 }
65 inline void Thread::set_trace_flag() {
66 set_suspend_flag(_trace_flag);
67 }
68 inline void Thread::clear_trace_flag() {
69 clear_suspend_flag(_trace_flag);
70 }
71
72 inline jlong Thread::cooked_allocated_bytes() {
73 jlong allocated_bytes = OrderAccess::load_acquire(&_allocated_bytes);
74 if (UseTLAB) {
75 size_t used_bytes = tlab().used_bytes();
76 if (used_bytes <= ThreadLocalAllocBuffer::max_size_in_bytes()) {
77 // Comparing used_bytes with the maximum allowed size will ensure
78 // that we don't add the used bytes from a semi-initialized TLAB
79 // ending up with incorrect values. There is still a race between
80 // incrementing _allocated_bytes and clearing the TLAB, that might
81 // cause double counting in rare cases.
82 return allocated_bytes + used_bytes;
83 }
84 }
85 return allocated_bytes;
86 }
87
88 inline ThreadsList* Thread::cmpxchg_threads_hazard_ptr(ThreadsList* exchange_value, ThreadsList* compare_value) {
89 return (ThreadsList*)Atomic::cmpxchg(exchange_value, &_threads_hazard_ptr, compare_value);
90 }
91
92 inline ThreadsList* Thread::get_threads_hazard_ptr() {
93 return (ThreadsList*)OrderAccess::load_acquire(&_threads_hazard_ptr);
94 }
95
96 inline void Thread::set_threads_hazard_ptr(ThreadsList* new_list) {
97 OrderAccess::release_store_fence(&_threads_hazard_ptr, new_list);
98 }
99
100 inline void JavaThread::set_ext_suspended() {
101 set_suspend_flag (_ext_suspended);
102 }
103 inline void JavaThread::clear_ext_suspended() {
104 clear_suspend_flag(_ext_suspended);
105 }
106
107 inline void JavaThread::set_external_suspend() {
108 set_suspend_flag(_external_suspend);
109 }
110 inline void JavaThread::clear_external_suspend() {
111 clear_suspend_flag(_external_suspend);
112 }
113
114 inline void JavaThread::set_deopt_suspend() {
115 set_suspend_flag(_deopt_suspend);
116 }
117 inline void JavaThread::clear_deopt_suspend() {
118 clear_suspend_flag(_deopt_suspend);
119 }
120
121 inline void JavaThread::set_pending_async_exception(oop e) {
122 _pending_async_exception = e;
123 _special_runtime_exit_condition = _async_exception;
124 set_has_async_exception();
125 }
126
127 #if defined(PPC64) || defined (AARCH64)
128 inline JavaThreadState JavaThread::thread_state() const {
129 return (JavaThreadState) OrderAccess::load_acquire((volatile jint*)&_thread_state);
130 }
131
132 inline void JavaThread::set_thread_state(JavaThreadState s) {
133 OrderAccess::release_store((volatile jint*)&_thread_state, (jint)s);
134 }
135 #endif
136
137 inline void JavaThread::set_done_attaching_via_jni() {
138 _jni_attach_state = _attached_via_jni;
139 OrderAccess::fence();
140 }
141
142 inline bool JavaThread::stack_guard_zone_unused() {
143 return _stack_guard_state == stack_guard_unused;
144 }
145
146 inline bool JavaThread::stack_yellow_reserved_zone_disabled() {
147 return _stack_guard_state == stack_guard_yellow_reserved_disabled;
148 }
149
150 inline bool JavaThread::stack_reserved_zone_disabled() {
151 return _stack_guard_state == stack_guard_reserved_disabled;
152 }
153
154 inline size_t JavaThread::stack_available(address cur_sp) {
155 // This code assumes java stacks grow down
156 address low_addr; // Limit on the address for deepest stack depth
157 if (_stack_guard_state == stack_guard_unused) {
158 low_addr = stack_end();
159 } else {
160 low_addr = stack_reserved_zone_base();
161 }
162 return cur_sp > low_addr ? cur_sp - low_addr : 0;
163 }
164
165 inline bool JavaThread::stack_guards_enabled() {
166 #ifdef ASSERT
167 if (os::uses_stack_guard_pages() &&
168 !(DisablePrimordialThreadGuardPages && os::is_primordial_thread())) {
169 assert(_stack_guard_state != stack_guard_unused, "guard pages must be in use");
170 }
171 #endif
172 return _stack_guard_state == stack_guard_enabled;
173 }
174
175 // The release make sure this store is done after storing the handshake
176 // operation or global state
177 inline void JavaThread::set_polling_page(void* poll_value) {
178 OrderAccess::release_store(polling_page_addr(), poll_value);
179 }
180
181 // The aqcquire make sure reading of polling page is done before
182 // the reading the handshake operation or the global state
183 inline volatile void* JavaThread::get_polling_page() {
184 return OrderAccess::load_acquire(polling_page_addr());
185 }
186
187 inline bool JavaThread::is_exiting() const {
188 // Use load-acquire so that setting of _terminated by
189 // JavaThread::exit() is seen more quickly.
190 TerminatedTypes l_terminated = (TerminatedTypes)
191 OrderAccess::load_acquire((volatile jint *) &_terminated);
192 return l_terminated == _thread_exiting || check_is_terminated(l_terminated);
193 }
194
195 inline bool JavaThread::is_terminated() const {
196 // Use load-acquire so that setting of _terminated by
197 // JavaThread::exit() is seen more quickly.
198 TerminatedTypes l_terminated = (TerminatedTypes)
199 OrderAccess::load_acquire((volatile jint *) &_terminated);
200 return check_is_terminated(l_terminated);
201 }
202
203 inline void JavaThread::set_terminated(TerminatedTypes t) {
204 // use release-store so the setting of _terminated is seen more quickly
205 OrderAccess::release_store((volatile jint *) &_terminated, (jint) t);
206 }
207
208 // special for Threads::remove() which is static:
209 inline void JavaThread::set_terminated_value() {
210 // use release-store so the setting of _terminated is seen more quickly
211 OrderAccess::release_store((volatile jint *) &_terminated, (jint) _thread_terminated);
212 }
213
214 #endif // SHARE_VM_RUNTIME_THREAD_INLINE_HPP