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annotate src/share/vm/runtime/osThread.hpp @ 18096:ca6d25be853b jdk8u25-b13
8044269: Analysis of archive files.
Summary: Add checksum verification.
Reviewed-by: iklam, dholmes, mschoene
| author | jiangli |
|---|---|
| date | Tue, 12 Aug 2014 17:46:16 -0400 |
| parents | bdd155477289 |
| children | 4ca6dc0799b6 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_RUNTIME_OSTHREAD_HPP |
| 26 #define SHARE_VM_RUNTIME_OSTHREAD_HPP | |
| 27 | |
| 28 #include "runtime/frame.hpp" | |
| 29 #include "runtime/handles.hpp" | |
| 30 #include "runtime/javaFrameAnchor.hpp" | |
| 31 #include "runtime/objectMonitor.hpp" | |
| 32 #include "utilities/top.hpp" | |
| 33 | |
| 0 | 34 // The OSThread class holds OS-specific thread information. It is equivalent |
| 35 // to the sys_thread_t structure of the classic JVM implementation. | |
| 36 | |
| 37 // The thread states represented by the ThreadState values are platform-specific | |
| 38 // and are likely to be only approximate, because most OSes don't give you access | |
| 39 // to precise thread state information. | |
| 40 | |
| 41 // Note: the ThreadState is legacy code and is not correctly implemented. | |
| 42 // Uses of ThreadState need to be replaced by the state in the JavaThread. | |
| 43 | |
| 44 enum ThreadState { | |
| 45 ALLOCATED, // Memory has been allocated but not initialized | |
| 46 INITIALIZED, // The thread has been initialized but yet started | |
| 47 RUNNABLE, // Has been started and is runnable, but not necessarily running | |
| 48 MONITOR_WAIT, // Waiting on a contended monitor lock | |
| 49 CONDVAR_WAIT, // Waiting on a condition variable | |
| 50 OBJECT_WAIT, // Waiting on an Object.wait() call | |
| 51 BREAKPOINTED, // Suspended at breakpoint | |
| 52 SLEEPING, // Thread.sleep() | |
| 53 ZOMBIE // All done, but not reclaimed yet | |
| 54 }; | |
| 55 | |
| 56 // I'd make OSThread a ValueObj embedded in Thread to avoid an indirection, but | |
| 57 // the assembler test in java.cpp expects that it can install the OSThread of | |
| 58 // the main thread into its own Thread at will. | |
| 59 | |
| 60 | |
| 6197 | 61 class OSThread: public CHeapObj<mtThread> { |
| 0 | 62 friend class VMStructs; |
| 63 private: | |
| 64 OSThreadStartFunc _start_proc; // Thread start routine | |
| 65 void* _start_parm; // Thread start routine parameter | |
| 66 volatile ThreadState _state; // Thread state *hint* | |
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67 volatile jint _interrupted; // Thread.isInterrupted state |
| 0 | 68 |
| 69 // Note: _interrupted must be jint, so that Java intrinsics can access it. | |
| 70 // The value stored there must be either 0 or 1. It must be possible | |
| 71 // for Java to emulate Thread.currentThread().isInterrupted() by performing | |
| 72 // the double indirection Thread::current()->_osthread->_interrupted. | |
| 73 | |
| 74 // Methods | |
| 75 public: | |
| 76 void set_state(ThreadState state) { _state = state; } | |
| 77 ThreadState get_state() { return _state; } | |
| 78 | |
| 79 OSThread(OSThreadStartFunc start_proc, void* start_parm); | |
| 80 ~OSThread(); | |
| 81 | |
| 82 // Accessors | |
| 83 OSThreadStartFunc start_proc() const { return _start_proc; } | |
| 84 void set_start_proc(OSThreadStartFunc start_proc) { _start_proc = start_proc; } | |
| 85 void* start_parm() const { return _start_parm; } | |
| 86 void set_start_parm(void* start_parm) { _start_parm = start_parm; } | |
| 87 | |
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88 volatile bool interrupted() const { return _interrupted != 0; } |
| 0 | 89 void set_interrupted(bool z) { _interrupted = z ? 1 : 0; } |
| 90 | |
| 91 // Printing | |
| 92 void print_on(outputStream* st) const; | |
| 93 void print() const { print_on(tty); } | |
| 94 | |
| 95 // For java intrinsics: | |
| 96 static ByteSize interrupted_offset() { return byte_offset_of(OSThread, _interrupted); } | |
| 97 | |
| 98 // Platform dependent stuff | |
| 1972 | 99 #ifdef TARGET_OS_FAMILY_linux |
| 100 # include "osThread_linux.hpp" | |
| 101 #endif | |
| 102 #ifdef TARGET_OS_FAMILY_solaris | |
| 103 # include "osThread_solaris.hpp" | |
| 104 #endif | |
| 105 #ifdef TARGET_OS_FAMILY_windows | |
| 106 # include "osThread_windows.hpp" | |
| 107 #endif | |
| 14411 | 108 #ifdef TARGET_OS_FAMILY_aix |
| 109 # include "osThread_aix.hpp" | |
| 110 #endif | |
| 3960 | 111 #ifdef TARGET_OS_FAMILY_bsd |
| 112 # include "osThread_bsd.hpp" | |
| 113 #endif | |
| 1972 | 114 |
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115 public: |
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116 static ByteSize thread_id_offset() { return byte_offset_of(OSThread, _thread_id); } |
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117 static size_t thread_id_size() { return sizeof(thread_id_t); } |
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118 |
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119 thread_id_t thread_id() const { return _thread_id; } |
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120 |
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121 void set_thread_id(thread_id_t id) { _thread_id = id; } |
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122 |
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123 private: |
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124 // _thread_id is kernel thread id (similar to LWP id on Solaris). Each |
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125 // thread has a unique thread_id (BsdThreads or NPTL). It can be used |
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126 // to access /proc. |
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127 thread_id_t _thread_id; |
| 0 | 128 }; |
| 129 | |
| 130 | |
| 131 // Utility class for use with condition variables: | |
| 132 class OSThreadWaitState : public StackObj { | |
| 133 OSThread* _osthread; | |
| 134 ThreadState _old_state; | |
| 135 public: | |
| 136 OSThreadWaitState(OSThread* osthread, bool is_object_wait) { | |
| 137 _osthread = osthread; | |
| 138 _old_state = osthread->get_state(); | |
| 139 if (is_object_wait) { | |
| 140 osthread->set_state(OBJECT_WAIT); | |
| 141 } else { | |
| 142 osthread->set_state(CONDVAR_WAIT); | |
| 143 } | |
| 144 } | |
| 145 ~OSThreadWaitState() { | |
| 146 _osthread->set_state(_old_state); | |
| 147 } | |
| 148 }; | |
| 149 | |
| 150 | |
| 151 // Utility class for use with contended monitors: | |
| 152 class OSThreadContendState : public StackObj { | |
| 153 OSThread* _osthread; | |
| 154 ThreadState _old_state; | |
| 155 public: | |
| 156 OSThreadContendState(OSThread* osthread) { | |
| 157 _osthread = osthread; | |
| 158 _old_state = osthread->get_state(); | |
| 159 osthread->set_state(MONITOR_WAIT); | |
| 160 } | |
| 161 ~OSThreadContendState() { | |
| 162 _osthread->set_state(_old_state); | |
| 163 } | |
| 164 }; | |
| 1972 | 165 |
| 166 #endif // SHARE_VM_RUNTIME_OSTHREAD_HPP |