1 /* 2 * Copyright (c) 1997, 2010, 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 OS_SOLARIS_VM_OSTHREAD_SOLARIS_HPP 26 #define OS_SOLARIS_VM_OSTHREAD_SOLARIS_HPP 27 28 // This is embedded via include into the class OSThread 29 30 private: 31 thread_t _thread_id; // Solaris thread id 32 uint _lwp_id; // lwp ID, only used with bound threads 33 int _native_priority; // Saved native priority when starting 34 // a bound thread 35 sigset_t _caller_sigmask; // Caller's signal mask 36 bool _vm_created_thread; // true if the VM create this thread, 37 // false if primary thread or attached thread 38 public: 39 thread_t thread_id() const { return _thread_id; } 40 uint lwp_id() const { return _lwp_id; } 41 int native_priority() const { return _native_priority; } 42 43 // Set and get state of _vm_created_thread flag 44 void set_vm_created() { _vm_created_thread = true; } 45 bool is_vm_created() { return _vm_created_thread; } 46 47 // Methods to save/restore caller's signal mask 48 sigset_t caller_sigmask() const { return _caller_sigmask; } 49 void set_caller_sigmask(sigset_t sigmask) { _caller_sigmask = sigmask; } 50 51 #ifndef PRODUCT 52 // Used for debugging, return a unique integer for each thread. 53 int thread_identifier() const { return _thread_id; } 54 #endif 55 #ifdef ASSERT 56 // On solaris reposition can fail in two ways: 57 // 1: a mismatched pc, because signal is delivered too late, target thread 58 // is resumed. 59 // 2: on a timeout where signal is lost, target thread is resumed. 60 bool valid_reposition_failure() { 61 // only 1 and 2 can happen and we can handle both of them 62 return true; 63 } 64 #endif 65 void set_thread_id(thread_t id) { _thread_id = id; } 66 void set_lwp_id(uint id) { _lwp_id = id; } 67 void set_native_priority(int prio) { _native_priority = prio; } 68 69 // *************************************************************** 70 // interrupt support. interrupts (using signals) are used to get 71 // the thread context (get_thread_pc), to set the thread context 72 // (set_thread_pc), and to implement java.lang.Thread.interrupt. 73 // *************************************************************** 74 75 public: 76 77 class InterruptArguments : StackObj { 78 private: 79 Thread* _thread; // the thread to signal was dispatched to 80 ucontext_t* _ucontext; // the machine context at the time of the signal 81 82 public: 83 InterruptArguments(Thread* thread, ucontext_t* ucontext) { 84 _thread = thread; 85 _ucontext = ucontext; 86 } 87 88 Thread* thread() const { return _thread; } 89 ucontext_t* ucontext() const { return _ucontext; } 90 }; 91 92 // There are currently no asynchronous callbacks - and we'd better not 93 // support them in the future either, as they need to be deallocated from 94 // the interrupt handler, which is not safe; they also require locks to 95 // protect the callback queue. 96 97 class Sync_Interrupt_Callback : private StackObj { 98 protected: 99 volatile bool _is_done; 100 Monitor* _sync; 101 Thread* _target; 102 public: 103 Sync_Interrupt_Callback(Monitor * sync) { 104 _is_done = false; _target = NULL; _sync = sync; 105 } 106 107 bool is_done() const { return _is_done; } 108 Thread* target() const { return _target; } 109 110 int interrupt(Thread * target, int timeout); 111 112 // override to implement the callback. 113 virtual void execute(InterruptArguments *args) = 0; 114 115 void leave_callback(); 116 }; 117 118 private: 119 120 Sync_Interrupt_Callback * volatile _current_callback; 121 enum { 122 callback_in_progress = 1 123 }; 124 Mutex * _current_callback_lock; // only used on v8 125 126 public: 127 128 int set_interrupt_callback (Sync_Interrupt_Callback * cb); 129 void remove_interrupt_callback(Sync_Interrupt_Callback * cb); 130 void do_interrupt_callbacks_at_interrupt(InterruptArguments *args); 131 132 // *************************************************************** 133 // java.lang.Thread.interrupt state. 134 // *************************************************************** 135 136 private: 137 138 JavaThreadState _saved_interrupt_thread_state; // the thread state before a system call -- restored afterward 139 140 public: 141 142 143 JavaThreadState saved_interrupt_thread_state() { return _saved_interrupt_thread_state; } 144 void set_saved_interrupt_thread_state(JavaThreadState state) { _saved_interrupt_thread_state = state; } 145 146 static void handle_spinlock_contention(int tries); // Used for thread local eden locking 147 148 // *************************************************************** 149 // Platform dependent initialization and cleanup 150 // *************************************************************** 151 152 private: 153 154 void pd_initialize(); 155 void pd_destroy(); 156 157 #endif // OS_SOLARIS_VM_OSTHREAD_SOLARIS_HPP --- EOF ---