1 /*

     2  * Copyright (c) 1997, 2017, 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  public:

    30   typedef thread_t thread_id_t;

    31 

    32  private:

    33   uint     _lwp_id;            // lwp ID, only used with bound threads

    34   int      _native_priority;   // Saved native priority when starting

    35                                // a bound thread

    36   sigset_t _caller_sigmask;    // Caller's signal mask

    37   bool     _vm_created_thread; // true if the VM created this thread,

    38                                // false if primary thread or attached thread

    39  public:

    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_lwp_id(uint id)           { _lwp_id = id; }

    66   void set_native_priority(int prio) { _native_priority = prio; }

    67 

    68  public:

    69   os::SuspendResume sr;

    70 

    71  private:

    72   ucontext_t* _ucontext;

    73 

    74  public:

    75   ucontext_t* ucontext() const { return _ucontext; }

    76   void set_ucontext(ucontext_t* ptr) { _ucontext = ptr; }

    77   static void SR_handler(Thread* thread, ucontext_t* uc);

    78 

    79   // ***************************************************************

    80   // Platform dependent initialization and cleanup

    81   // ***************************************************************

    82 

    83 private:

    84 

    85   void pd_initialize();

    86   void pd_destroy();

    87 

    88 #endif // OS_SOLARIS_VM_OSTHREAD_SOLARIS_HPP