thread.inline.hpp revision 11857:d0fbf661cc16 
1/*
2 * Copyright (c) 2012, 2016, 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
36inline 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}
46inline 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
57inline void Thread::set_has_async_exception() {
58  set_suspend_flag(_has_async_exception);
59}
60inline void Thread::clear_has_async_exception() {
61  clear_suspend_flag(_has_async_exception);
62}
63inline void Thread::set_critical_native_unlock() {
64  set_suspend_flag(_critical_native_unlock);
65}
66inline void Thread::clear_critical_native_unlock() {
67  clear_suspend_flag(_critical_native_unlock);
68}
69
70inline jlong Thread::cooked_allocated_bytes() {
71  jlong allocated_bytes = OrderAccess::load_acquire(&_allocated_bytes);
72  if (UseTLAB) {
73    size_t used_bytes = tlab().used_bytes();
74    if (used_bytes <= ThreadLocalAllocBuffer::max_size_in_bytes()) {
75      // Comparing used_bytes with the maximum allowed size will ensure
76      // that we don't add the used bytes from a semi-initialized TLAB
77      // ending up with incorrect values. There is still a race between
78      // incrementing _allocated_bytes and clearing the TLAB, that might
79      // cause double counting in rare cases.
80      return allocated_bytes + used_bytes;
81    }
82  }
83  return allocated_bytes;
84}
85
86inline void JavaThread::set_ext_suspended() {
87  set_suspend_flag (_ext_suspended);
88}
89inline void JavaThread::clear_ext_suspended() {
90  clear_suspend_flag(_ext_suspended);
91}
92
93inline void JavaThread::set_external_suspend() {
94  set_suspend_flag(_external_suspend);
95}
96inline void JavaThread::clear_external_suspend() {
97  clear_suspend_flag(_external_suspend);
98}
99
100inline void JavaThread::set_deopt_suspend() {
101  set_suspend_flag(_deopt_suspend);
102}
103inline void JavaThread::clear_deopt_suspend() {
104  clear_suspend_flag(_deopt_suspend);
105}
106
107inline void JavaThread::set_pending_async_exception(oop e) {
108  _pending_async_exception = e;
109  _special_runtime_exit_condition = _async_exception;
110  set_has_async_exception();
111}
112
113#if defined(PPC64) || defined (AARCH64)
114inline JavaThreadState JavaThread::thread_state() const    {
115  return (JavaThreadState) OrderAccess::load_acquire((volatile jint*)&_thread_state);
116}
117
118inline void JavaThread::set_thread_state(JavaThreadState s) {
119  OrderAccess::release_store((volatile jint*)&_thread_state, (jint)s);
120}
121#endif
122
123inline void JavaThread::set_done_attaching_via_jni() {
124  _jni_attach_state = _attached_via_jni;
125  OrderAccess::fence();
126}
127
128inline bool JavaThread::stack_guard_zone_unused() {
129  return _stack_guard_state == stack_guard_unused;
130}
131
132inline bool JavaThread::stack_yellow_reserved_zone_disabled() {
133  return _stack_guard_state == stack_guard_yellow_reserved_disabled;
134}
135
136inline bool JavaThread::stack_reserved_zone_disabled() {
137  return _stack_guard_state == stack_guard_reserved_disabled;
138}
139
140inline size_t JavaThread::stack_available(address cur_sp) {
141  // This code assumes java stacks grow down
142  address low_addr; // Limit on the address for deepest stack depth
143  if (_stack_guard_state == stack_guard_unused) {
144    low_addr = stack_end();
145  } else {
146    low_addr = stack_reserved_zone_base();
147  }
148  return cur_sp > low_addr ? cur_sp - low_addr : 0;
149}
150
151inline bool JavaThread::stack_guards_enabled() {
152#ifdef ASSERT
153  if (os::uses_stack_guard_pages()) {
154    assert(_stack_guard_state != stack_guard_unused, "guard pages must be in use");
155  }
156#endif
157  return _stack_guard_state == stack_guard_enabled;
158}
159
160#endif // SHARE_VM_RUNTIME_THREAD_INLINE_HPP
161