osThread_solaris.hpp revision 1472:c18cbe5936b8 
1/*
2 * Copyright (c) 1997, 2006, 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// This is embedded via include into the class OSThread
26
27 private:
28
29  thread_t _thread_id;      // Solaris thread id
30  unsigned int  _lwp_id;    // lwp ID, only used with bound threads
31  sigset_t _caller_sigmask; // Caller's signal mask
32  bool _vm_created_thread;  // true if the VM create this thread
33                            // false if primary thread or attached thread
34 public:
35
36  thread_t thread_id() const      { return _thread_id; }
37
38  unsigned int lwp_id() const     { return _lwp_id; }
39
40  // Set and get state of _vm_created_thread flag
41  void set_vm_created()           { _vm_created_thread = true; }
42  bool is_vm_created()            { return _vm_created_thread; }
43
44  // Methods to save/restore caller's signal mask
45  sigset_t  caller_sigmask() const       { return _caller_sigmask; }
46  void    set_caller_sigmask(sigset_t sigmask)  { _caller_sigmask = sigmask; }
47
48#ifndef PRODUCT
49  // Used for debugging, return a unique integer for each thread.
50  int thread_identifier() const   { return _thread_id; }
51#endif
52#ifdef ASSERT
53  // On solaris reposition can fail in two ways:
54  // 1: a mismatched pc, because signal is delivered too late, target thread
55  //    is resumed.
56  // 2: on a timeout where signal is lost, target thread is resumed.
57  bool valid_reposition_failure() {
58    // only 1 and 2 can happen and we can handle both of them
59    return true;
60  }
61#endif
62  void set_thread_id(thread_t id) { _thread_id = id;   }
63  void set_lwp_id(unsigned int id){ _lwp_id = id;   }
64
65 // ***************************************************************
66 // interrupt support.  interrupts (using signals) are used to get
67 // the thread context (get_thread_pc), to set the thread context
68 // (set_thread_pc), and to implement java.lang.Thread.interrupt.
69 // ***************************************************************
70
71 public:
72
73  class InterruptArguments : StackObj {
74   private:
75    Thread*     _thread;   // the thread to signal was dispatched to
76    ucontext_t* _ucontext; // the machine context at the time of the signal
77
78   public:
79    InterruptArguments(Thread* thread, ucontext_t* ucontext) {
80      _thread   = thread;
81      _ucontext = ucontext;
82    }
83
84    Thread*     thread()   const { return _thread;   }
85    ucontext_t* ucontext() const { return _ucontext; }
86  };
87
88  // There are currently no asynchronous callbacks - and we'd better not
89  // support them in the future either, as they need to be deallocated from
90  // the interrupt handler, which is not safe; they also require locks to
91  // protect the callback queue.
92
93  class Sync_Interrupt_Callback : private StackObj {
94   protected:
95    volatile bool _is_done;
96    Monitor*      _sync;
97    Thread*       _target;
98   public:
99    Sync_Interrupt_Callback(Monitor * sync) {
100      _is_done = false;  _target = NULL;  _sync = sync;
101    }
102
103    bool is_done() const               { return _is_done; }
104    Thread* target() const             { return _target;  }
105
106    int interrupt(Thread * target, int timeout);
107
108    // override to implement the callback.
109    virtual void execute(InterruptArguments *args) = 0;
110
111    void leave_callback();
112  };
113
114 private:
115
116  Sync_Interrupt_Callback * volatile _current_callback;
117  enum {
118    callback_in_progress = 1
119  };
120  Mutex * _current_callback_lock;       // only used on v8
121
122 public:
123
124  int set_interrupt_callback    (Sync_Interrupt_Callback * cb);
125  void remove_interrupt_callback(Sync_Interrupt_Callback * cb);
126  void OSThread::do_interrupt_callbacks_at_interrupt(InterruptArguments *args);
127
128 // ***************************************************************
129 // java.lang.Thread.interrupt state.
130 // ***************************************************************
131
132 private:
133
134  JavaThreadState      _saved_interrupt_thread_state;       // the thread state before a system call -- restored afterward
135
136 public:
137
138
139  JavaThreadState   saved_interrupt_thread_state()                              { return _saved_interrupt_thread_state; }
140  void              set_saved_interrupt_thread_state(JavaThreadState state)     { _saved_interrupt_thread_state = state; }
141
142  static void       handle_spinlock_contention(int tries);                      // Used for thread local eden locking
143
144  // ***************************************************************
145  // Platform dependent initialization and cleanup
146  // ***************************************************************
147
148private:
149
150  void pd_initialize();
151  void pd_destroy();
152