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