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