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1 /* |
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2 * Copyright 1997-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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20 * CA 95054 USA or visit www.sun.com if you need additional information or |
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21 * have any questions. |
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22 * |
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23 */ |
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24 |
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25 // This is embedded via include into the class OSThread |
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26 |
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27 private: |
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28 |
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29 thread_t _thread_id; // Solaris thread id |
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30 unsigned int _lwp_id; // lwp ID, only used with bound threads |
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31 sigset_t _caller_sigmask; // Caller's signal mask |
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32 bool _vm_created_thread; // true if the VM create this thread |
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33 // false if primary thread or attached thread |
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34 public: |
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35 |
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36 thread_t thread_id() const { return _thread_id; } |
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37 |
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38 unsigned int lwp_id() const { return _lwp_id; } |
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39 |
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40 // Set and get state of _vm_created_thread flag |
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41 void set_vm_created() { _vm_created_thread = true; } |
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42 bool is_vm_created() { return _vm_created_thread; } |
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43 |
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44 // Methods to save/restore caller's signal mask |
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45 sigset_t caller_sigmask() const { return _caller_sigmask; } |
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46 void set_caller_sigmask(sigset_t sigmask) { _caller_sigmask = sigmask; } |
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47 |
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48 #ifndef PRODUCT |
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49 // Used for debugging, return a unique integer for each thread. |
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50 int thread_identifier() const { return _thread_id; } |
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51 #endif |
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52 #ifdef ASSERT |
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53 // On solaris reposition can fail in two ways: |
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54 // 1: a mismatched pc, because signal is delivered too late, target thread |
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55 // is resumed. |
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56 // 2: on a timeout where signal is lost, target thread is resumed. |
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57 bool valid_reposition_failure() { |
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58 // only 1 and 2 can happen and we can handle both of them |
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59 return true; |
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60 } |
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61 #endif |
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62 void set_thread_id(thread_t id) { _thread_id = id; } |
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63 void set_lwp_id(unsigned int id){ _lwp_id = id; } |
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64 |
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65 // *************************************************************** |
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66 // interrupt support. interrupts (using signals) are used to get |
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67 // the thread context (get_thread_pc), to set the thread context |
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68 // (set_thread_pc), and to implement java.lang.Thread.interrupt. |
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69 // *************************************************************** |
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70 |
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71 public: |
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72 |
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73 class InterruptArguments : StackObj { |
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74 private: |
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75 Thread* _thread; // the thread to signal was dispatched to |
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76 ucontext_t* _ucontext; // the machine context at the time of the signal |
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77 |
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78 public: |
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79 InterruptArguments(Thread* thread, ucontext_t* ucontext) { |
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80 _thread = thread; |
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81 _ucontext = ucontext; |
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82 } |
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83 |
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84 Thread* thread() const { return _thread; } |
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85 ucontext_t* ucontext() const { return _ucontext; } |
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86 }; |
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87 |
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88 // There are currently no asynchronous callbacks - and we'd better not |
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89 // support them in the future either, as they need to be deallocated from |
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90 // the interrupt handler, which is not safe; they also require locks to |
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91 // protect the callback queue. |
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92 |
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93 class Sync_Interrupt_Callback : private StackObj { |
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94 protected: |
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95 volatile bool _is_done; |
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96 Monitor* _sync; |
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97 Thread* _target; |
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98 public: |
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99 Sync_Interrupt_Callback(Monitor * sync) { |
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100 _is_done = false; _target = NULL; _sync = sync; |
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101 } |
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102 |
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103 bool is_done() const { return _is_done; } |
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104 Thread* target() const { return _target; } |
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105 |
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106 int interrupt(Thread * target, int timeout); |
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107 |
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108 // override to implement the callback. |
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109 virtual void execute(InterruptArguments *args) = 0; |
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110 |
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111 void leave_callback(); |
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112 }; |
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113 |
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114 private: |
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115 |
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116 Sync_Interrupt_Callback * volatile _current_callback; |
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117 enum { |
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118 callback_in_progress = 1 |
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119 }; |
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120 Mutex * _current_callback_lock; // only used on v8 |
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121 |
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122 public: |
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123 |
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124 int set_interrupt_callback (Sync_Interrupt_Callback * cb); |
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125 void remove_interrupt_callback(Sync_Interrupt_Callback * cb); |
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126 void OSThread::do_interrupt_callbacks_at_interrupt(InterruptArguments *args); |
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127 |
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128 // *************************************************************** |
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129 // java.lang.Thread.interrupt state. |
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130 // *************************************************************** |
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131 |
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132 private: |
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133 |
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134 JavaThreadState _saved_interrupt_thread_state; // the thread state before a system call -- restored afterward |
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135 |
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136 public: |
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137 |
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138 |
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139 JavaThreadState saved_interrupt_thread_state() { return _saved_interrupt_thread_state; } |
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140 void set_saved_interrupt_thread_state(JavaThreadState state) { _saved_interrupt_thread_state = state; } |
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141 |
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142 static void handle_spinlock_contention(int tries); // Used for thread local eden locking |
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143 |
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144 // *************************************************************** |
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145 // Platform dependent initialization and cleanup |
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146 // *************************************************************** |
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147 |
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148 private: |
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149 |
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150 void pd_initialize(); |
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151 void pd_destroy(); |