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3960
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1 /*
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2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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.
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22 *
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23 */
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24
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25 #ifndef OS_BSD_VM_OSTHREAD_BSD_HPP
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26 #define OS_BSD_VM_OSTHREAD_BSD_HPP
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27
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28 private:
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29 int _thread_type;
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30
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31 public:
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32
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33 int thread_type() const {
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34 return _thread_type;
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35 }
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36 void set_thread_type(int type) {
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37 _thread_type = type;
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38 }
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39
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40 private:
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41
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42 #ifdef _ALLBSD_SOURCE
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43 // _thread_id and _pthread_id are the same on BSD
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44 // keep both to minimize code divergence in os_bsd.cpp
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45 pthread_t _thread_id;
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46 pthread_t _pthread_id;
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47 #else
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48 // _thread_id is kernel thread id (similar to LWP id on Solaris). Each
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49 // thread has a unique thread_id (BsdThreads or NPTL). It can be used
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50 // to access /proc.
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51 pid_t _thread_id;
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52
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53 // _pthread_id is the pthread id, which is used by library calls
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54 // (e.g. pthread_kill).
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55 pthread_t _pthread_id;
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56 #endif
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57
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58 sigset_t _caller_sigmask; // Caller's signal mask
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59
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60 public:
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61
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62 // Methods to save/restore caller's signal mask
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63 sigset_t caller_sigmask() const { return _caller_sigmask; }
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64 void set_caller_sigmask(sigset_t sigmask) { _caller_sigmask = sigmask; }
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65
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66 #ifdef _ALLBSD_SOURCE
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67 pthread_t thread_id() const {
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68 return _thread_id;
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69 }
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70 #else
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71 pid_t thread_id() const {
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72 return _thread_id;
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73 }
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74 #endif
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75 #ifndef PRODUCT
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76 // Used for debugging, return a unique integer for each thread.
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77 intptr_t thread_identifier() const { return (intptr_t)_pthread_id; }
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78 #endif
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79 #ifdef ASSERT
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80 // We expect no reposition failures so kill vm if we get one.
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81 //
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82 bool valid_reposition_failure() {
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83 return false;
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84 }
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85 #endif // ASSERT
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86 #ifdef _ALLBSD_SOURCE
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87 void set_thread_id(pthread_t id) {
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88 _thread_id = id;
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89 }
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90 #else
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91 void set_thread_id(pid_t id) {
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92 _thread_id = id;
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93 }
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94 #endif
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95 pthread_t pthread_id() const {
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96 return _pthread_id;
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97 }
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98 void set_pthread_id(pthread_t tid) {
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99 _pthread_id = tid;
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100 }
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101
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102 // ***************************************************************
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103 // suspension support.
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104 // ***************************************************************
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105
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106 public:
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107 // flags that support signal based suspend/resume on Bsd are in a
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108 // separate class to avoid confusion with many flags in OSThread that
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109 // are used by VM level suspend/resume.
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110 os::Bsd::SuspendResume sr;
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111
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112 // _ucontext and _siginfo are used by SR_handler() to save thread context,
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113 // and they will later be used to walk the stack or reposition thread PC.
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114 // If the thread is not suspended in SR_handler() (e.g. self suspend),
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115 // the value in _ucontext is meaningless, so we must use the last Java
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116 // frame information as the frame. This will mean that for threads
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117 // that are parked on a mutex the profiler (and safepoint mechanism)
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118 // will see the thread as if it were still in the Java frame. This
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119 // not a problem for the profiler since the Java frame is a close
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120 // enough result. For the safepoint mechanism when the give it the
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121 // Java frame we are not at a point where the safepoint needs the
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122 // frame to that accurate (like for a compiled safepoint) since we
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123 // should be in a place where we are native and will block ourselves
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124 // if we transition.
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125 private:
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126 void* _siginfo;
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127 ucontext_t* _ucontext;
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128 int _expanding_stack; /* non zero if manually expanding stack */
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129 address _alt_sig_stack; /* address of base of alternate signal stack */
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130
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131 public:
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132 void* siginfo() const { return _siginfo; }
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133 void set_siginfo(void* ptr) { _siginfo = ptr; }
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134 ucontext_t* ucontext() const { return _ucontext; }
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135 void set_ucontext(ucontext_t* ptr) { _ucontext = ptr; }
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136 void set_expanding_stack(void) { _expanding_stack = 1; }
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137 void clear_expanding_stack(void) { _expanding_stack = 0; }
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138 int expanding_stack(void) { return _expanding_stack; }
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139
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140 void set_alt_sig_stack(address val) { _alt_sig_stack = val; }
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141 address alt_sig_stack(void) { return _alt_sig_stack; }
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142
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143 private:
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144 Monitor* _startThread_lock; // sync parent and child in thread creation
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145
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146 public:
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147
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148 Monitor* startThread_lock() const {
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149 return _startThread_lock;
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150 }
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151
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152 // ***************************************************************
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153 // Platform dependent initialization and cleanup
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154 // ***************************************************************
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155
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156 private:
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157
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158 void pd_initialize();
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159 void pd_destroy();
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160
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161 // Reconciliation History
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162 // osThread_solaris.hpp 1.24 99/08/27 13:11:54
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163 // End
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164
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165 #endif // OS_BSD_VM_OSTHREAD_BSD_HPP
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