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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();
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