duke@435: /*
trims@1907:  * Copyright (c) 1997, 2006, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: // This is embedded via include into the class OSThread
duke@435: 
duke@435:  private:
duke@435: 
duke@435:   thread_t _thread_id;      // Solaris thread id
duke@435:   unsigned int  _lwp_id;    // lwp ID, only used with bound threads
duke@435:   sigset_t _caller_sigmask; // Caller's signal mask
duke@435:   bool _vm_created_thread;  // true if the VM create this thread
duke@435:                             // false if primary thread or attached thread
duke@435:  public:
duke@435: 
duke@435:   thread_t thread_id() const      { return _thread_id; }
duke@435: 
duke@435:   unsigned int lwp_id() const     { return _lwp_id; }
duke@435: 
duke@435:   // Set and get state of _vm_created_thread flag
duke@435:   void set_vm_created()           { _vm_created_thread = true; }
duke@435:   bool is_vm_created()            { return _vm_created_thread; }
duke@435: 
duke@435:   // Methods to save/restore caller's signal mask
duke@435:   sigset_t  caller_sigmask() const       { return _caller_sigmask; }
duke@435:   void    set_caller_sigmask(sigset_t sigmask)  { _caller_sigmask = sigmask; }
duke@435: 
duke@435: #ifndef PRODUCT
duke@435:   // Used for debugging, return a unique integer for each thread.
duke@435:   int thread_identifier() const   { return _thread_id; }
duke@435: #endif
duke@435: #ifdef ASSERT
duke@435:   // On solaris reposition can fail in two ways:
duke@435:   // 1: a mismatched pc, because signal is delivered too late, target thread
duke@435:   //    is resumed.
duke@435:   // 2: on a timeout where signal is lost, target thread is resumed.
duke@435:   bool valid_reposition_failure() {
duke@435:     // only 1 and 2 can happen and we can handle both of them
duke@435:     return true;
duke@435:   }
duke@435: #endif
duke@435:   void set_thread_id(thread_t id) { _thread_id = id;   }
duke@435:   void set_lwp_id(unsigned int id){ _lwp_id = id;   }
duke@435: 
duke@435:  // ***************************************************************
duke@435:  // interrupt support.  interrupts (using signals) are used to get
duke@435:  // the thread context (get_thread_pc), to set the thread context
duke@435:  // (set_thread_pc), and to implement java.lang.Thread.interrupt.
duke@435:  // ***************************************************************
duke@435: 
duke@435:  public:
duke@435: 
duke@435:   class InterruptArguments : StackObj {
duke@435:    private:
duke@435:     Thread*     _thread;   // the thread to signal was dispatched to
duke@435:     ucontext_t* _ucontext; // the machine context at the time of the signal
duke@435: 
duke@435:    public:
duke@435:     InterruptArguments(Thread* thread, ucontext_t* ucontext) {
duke@435:       _thread   = thread;
duke@435:       _ucontext = ucontext;
duke@435:     }
duke@435: 
duke@435:     Thread*     thread()   const { return _thread;   }
duke@435:     ucontext_t* ucontext() const { return _ucontext; }
duke@435:   };
duke@435: 
duke@435:   // There are currently no asynchronous callbacks - and we'd better not
duke@435:   // support them in the future either, as they need to be deallocated from
duke@435:   // the interrupt handler, which is not safe; they also require locks to
duke@435:   // protect the callback queue.
duke@435: 
duke@435:   class Sync_Interrupt_Callback : private StackObj {
duke@435:    protected:
duke@435:     volatile bool _is_done;
duke@435:     Monitor*      _sync;
duke@435:     Thread*       _target;
duke@435:    public:
duke@435:     Sync_Interrupt_Callback(Monitor * sync) {
duke@435:       _is_done = false;  _target = NULL;  _sync = sync;
duke@435:     }
duke@435: 
duke@435:     bool is_done() const               { return _is_done; }
duke@435:     Thread* target() const             { return _target;  }
duke@435: 
duke@435:     int interrupt(Thread * target, int timeout);
duke@435: 
duke@435:     // override to implement the callback.
duke@435:     virtual void execute(InterruptArguments *args) = 0;
duke@435: 
duke@435:     void leave_callback();
duke@435:   };
duke@435: 
duke@435:  private:
duke@435: 
duke@435:   Sync_Interrupt_Callback * volatile _current_callback;
duke@435:   enum {
duke@435:     callback_in_progress = 1
duke@435:   };
duke@435:   Mutex * _current_callback_lock;       // only used on v8
duke@435: 
duke@435:  public:
duke@435: 
duke@435:   int set_interrupt_callback    (Sync_Interrupt_Callback * cb);
duke@435:   void remove_interrupt_callback(Sync_Interrupt_Callback * cb);
zgu@1979:   void do_interrupt_callbacks_at_interrupt(InterruptArguments *args);
duke@435: 
duke@435:  // ***************************************************************
duke@435:  // java.lang.Thread.interrupt state.
duke@435:  // ***************************************************************
duke@435: 
duke@435:  private:
duke@435: 
duke@435:   JavaThreadState      _saved_interrupt_thread_state;       // the thread state before a system call -- restored afterward
duke@435: 
duke@435:  public:
duke@435: 
duke@435: 
duke@435:   JavaThreadState   saved_interrupt_thread_state()                              { return _saved_interrupt_thread_state; }
duke@435:   void              set_saved_interrupt_thread_state(JavaThreadState state)     { _saved_interrupt_thread_state = state; }
duke@435: 
duke@435:   static void       handle_spinlock_contention(int tries);                      // Used for thread local eden locking
duke@435: 
duke@435:   // ***************************************************************
duke@435:   // Platform dependent initialization and cleanup
duke@435:   // ***************************************************************
duke@435: 
duke@435: private:
duke@435: 
duke@435:   void pd_initialize();
duke@435:   void pd_destroy();