1 /*
   2  * Copyright (c) 1999, 2013, 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_BSD_VM_OSTHREAD_BSD_HPP
  26 #define OS_BSD_VM_OSTHREAD_BSD_HPP
  27 
  28  private:
  29   int _thread_type;
  30 
  31  public:
  32 
  33   int thread_type() const {
  34     return _thread_type;
  35   }
  36   void set_thread_type(int type) {
  37     _thread_type = type;
  38   }
  39 
  40  private:
  41 
  42 #ifdef __APPLE__
  43   typedef thread_t thread_id_t;
  44 #else
  45   typedef pthread_t thread_id_t;
  46 #endif
  47 
  48   // _pthread_id is the pthread id, which is used by library calls
  49   // (e.g. pthread_kill).
  50   pthread_t _pthread_id;
  51 
  52   // This is the "thread_id" from struct thread_identifier_info. According to a
  53   // comment in thread_info.h, this is a "system-wide unique 64-bit thread id".
  54   // The value is used by SA to correlate threads.
  55   uint64_t _unique_thread_id;
  56 
  57   sigset_t _caller_sigmask; // Caller's signal mask
  58 
  59  public:
  60 
  61   // Methods to save/restore caller's signal mask
  62   sigset_t  caller_sigmask() const       { return _caller_sigmask; }
  63   void    set_caller_sigmask(sigset_t sigmask)  { _caller_sigmask = sigmask; }
  64 
  65 #ifndef PRODUCT
  66   // Used for debugging, return a unique integer for each thread.
  67   intptr_t thread_identifier() const   { return (intptr_t)_pthread_id; }
  68 #endif
  69 
  70 #ifdef ASSERT
  71   // We expect no reposition failures so kill vm if we get one.
  72   //
  73   bool valid_reposition_failure() {
  74     return false;
  75   }
  76 #endif // ASSERT
  77 
  78   pthread_t pthread_id() const {
  79     return _pthread_id;
  80   }
  81   void set_pthread_id(pthread_t tid) {
  82     _pthread_id = tid;
  83   }
  84 
  85   void set_unique_thread_id(uint64_t id) {
  86     _unique_thread_id = id;
  87   }
  88 
  89   // ***************************************************************
  90   // suspension support.
  91   // ***************************************************************
  92 
  93 public:
  94   // flags that support signal based suspend/resume on Bsd are in a
  95   // separate class to avoid confusion with many flags in OSThread that
  96   // are used by VM level suspend/resume.
  97   os::SuspendResume sr;
  98 
  99   // _ucontext and _siginfo are used by SR_handler() to save thread context,
 100   // and they will later be used to walk the stack or reposition thread PC.
 101   // If the thread is not suspended in SR_handler() (e.g. self suspend),
 102   // the value in _ucontext is meaningless, so we must use the last Java
 103   // frame information as the frame. This will mean that for threads
 104   // that are parked on a mutex the profiler (and safepoint mechanism)
 105   // will see the thread as if it were still in the Java frame. This
 106   // not a problem for the profiler since the Java frame is a close
 107   // enough result. For the safepoint mechanism when the give it the
 108   // Java frame we are not at a point where the safepoint needs the
 109   // frame to that accurate (like for a compiled safepoint) since we
 110   // should be in a place where we are native and will block ourselves
 111   // if we transition.
 112 private:
 113   void* _siginfo;
 114   ucontext_t* _ucontext;
 115   int _expanding_stack;                 /* non zero if manually expanding stack */
 116   address _alt_sig_stack;               /* address of base of alternate signal stack */
 117 
 118 public:
 119   void* siginfo() const                   { return _siginfo;  }
 120   void set_siginfo(void* ptr)             { _siginfo = ptr;   }
 121   ucontext_t* ucontext() const            { return _ucontext; }
 122   void set_ucontext(ucontext_t* ptr)      { _ucontext = ptr;  }
 123   void set_expanding_stack(void)          { _expanding_stack = 1;  }
 124   void clear_expanding_stack(void)        { _expanding_stack = 0;  }
 125   int  expanding_stack(void)              { return _expanding_stack;  }
 126 
 127   void set_alt_sig_stack(address val)     { _alt_sig_stack = val; }
 128   address alt_sig_stack(void)             { return _alt_sig_stack; }
 129 
 130 private:
 131   Monitor* _startThread_lock;     // sync parent and child in thread creation
 132 
 133 public:
 134 
 135   Monitor* startThread_lock() const {
 136     return _startThread_lock;
 137   }
 138 
 139   // ***************************************************************
 140   // Platform dependent initialization and cleanup
 141   // ***************************************************************
 142 
 143 private:
 144 
 145   void pd_initialize();
 146   void pd_destroy();
 147 
 148 // Reconciliation History
 149 // osThread_solaris.hpp 1.24 99/08/27 13:11:54
 150 // End
 151 
 152 #endif // OS_BSD_VM_OSTHREAD_BSD_HPP