aoqi@0: /*
aoqi@0:  * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * Copyright 2012, 2013 SAP AG. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: #ifndef OS_AIX_VM_OSTHREAD_AIX_HPP
aoqi@0: #define OS_AIX_VM_OSTHREAD_AIX_HPP
aoqi@0: 
aoqi@0:  public:
aoqi@0:   typedef pid_t thread_id_t;
aoqi@0: 
aoqi@0:  private:
aoqi@0:   int _thread_type;
aoqi@0: 
aoqi@0:  public:
aoqi@0: 
aoqi@0:   int thread_type() const {
aoqi@0:     return _thread_type;
aoqi@0:   }
aoqi@0:   void set_thread_type(int type) {
aoqi@0:     _thread_type = type;
aoqi@0:   }
aoqi@0: 
aoqi@0:  private:
aoqi@0: 
aoqi@0:   // _pthread_id is the pthread id, which is used by library calls
aoqi@0:   // (e.g. pthread_kill).
aoqi@0:   pthread_t _pthread_id;
aoqi@0: 
aoqi@0:   sigset_t _caller_sigmask; // Caller's signal mask
aoqi@0: 
aoqi@0:  public:
aoqi@0: 
aoqi@0:   // Methods to save/restore caller's signal mask
aoqi@0:   sigset_t  caller_sigmask() const       { return _caller_sigmask; }
aoqi@0:   void    set_caller_sigmask(sigset_t sigmask)  { _caller_sigmask = sigmask; }
aoqi@0: 
aoqi@0: #ifndef PRODUCT
aoqi@0:   // Used for debugging, return a unique integer for each thread.
aoqi@0:   int thread_identifier() const   { return _thread_id; }
aoqi@0: #endif
aoqi@0: #ifdef ASSERT
aoqi@0:   // We expect no reposition failures so kill vm if we get one.
aoqi@0:   //
aoqi@0:   bool valid_reposition_failure() {
aoqi@0:     return false;
aoqi@0:   }
aoqi@0: #endif // ASSERT
aoqi@0:   pthread_t pthread_id() const {
aoqi@0:     return _pthread_id;
aoqi@0:   }
aoqi@0:   void set_pthread_id(pthread_t tid) {
aoqi@0:     _pthread_id = tid;
aoqi@0:   }
aoqi@0: 
aoqi@0:   // ***************************************************************
aoqi@0:   // suspension support.
aoqi@0:   // ***************************************************************
aoqi@0: 
aoqi@0:  public:
aoqi@0:   // flags that support signal based suspend/resume on Linux are in a
aoqi@0:   // separate class to avoid confusion with many flags in OSThread that
aoqi@0:   // are used by VM level suspend/resume.
aoqi@0:   os::SuspendResume sr;
aoqi@0: 
aoqi@0:   // _ucontext and _siginfo are used by SR_handler() to save thread context,
aoqi@0:   // and they will later be used to walk the stack or reposition thread PC.
aoqi@0:   // If the thread is not suspended in SR_handler() (e.g. self suspend),
aoqi@0:   // the value in _ucontext is meaningless, so we must use the last Java
aoqi@0:   // frame information as the frame. This will mean that for threads
aoqi@0:   // that are parked on a mutex the profiler (and safepoint mechanism)
aoqi@0:   // will see the thread as if it were still in the Java frame. This
aoqi@0:   // not a problem for the profiler since the Java frame is a close
aoqi@0:   // enough result. For the safepoint mechanism when the give it the
aoqi@0:   // Java frame we are not at a point where the safepoint needs the
aoqi@0:   // frame to that accurate (like for a compiled safepoint) since we
aoqi@0:   // should be in a place where we are native and will block ourselves
aoqi@0:   // if we transition.
aoqi@0:  private:
aoqi@0:   void* _siginfo;
aoqi@0:   ucontext_t* _ucontext;
aoqi@0:   int _expanding_stack;                 // non zero if manually expanding stack
aoqi@0:   address _alt_sig_stack;               // address of base of alternate signal stack
aoqi@0: 
aoqi@0:  public:
aoqi@0:   void* siginfo() const                   { return _siginfo;  }
aoqi@0:   void set_siginfo(void* ptr)             { _siginfo = ptr;   }
aoqi@0:   ucontext_t* ucontext() const            { return _ucontext; }
aoqi@0:   void set_ucontext(ucontext_t* ptr)      { _ucontext = ptr;  }
aoqi@0:   void set_expanding_stack(void)          { _expanding_stack = 1;  }
aoqi@0:   void clear_expanding_stack(void)        { _expanding_stack = 0;  }
aoqi@0:   int  expanding_stack(void)              { return _expanding_stack;  }
aoqi@0: 
aoqi@0:   void set_alt_sig_stack(address val)     { _alt_sig_stack = val; }
aoqi@0:   address alt_sig_stack(void)             { return _alt_sig_stack; }
aoqi@0: 
aoqi@0:  private:
aoqi@0:   Monitor* _startThread_lock;     // sync parent and child in thread creation
aoqi@0: 
aoqi@0:  public:
aoqi@0: 
aoqi@0:   Monitor* startThread_lock() const {
aoqi@0:     return _startThread_lock;
aoqi@0:   }
aoqi@0: 
aoqi@0:   // ***************************************************************
aoqi@0:   // Platform dependent initialization and cleanup
aoqi@0:   // ***************************************************************
aoqi@0: 
aoqi@0:  private:
aoqi@0: 
aoqi@0:   void pd_initialize();
aoqi@0:   void pd_destroy();
aoqi@0: 
aoqi@0:  public:
aoqi@0: 
aoqi@0:   // The last measured values of cpu timing to prevent the "stale
aoqi@0:   // value return" bug in thread_cpu_time.
aoqi@0:   volatile struct {
aoqi@0:     jlong sys;
aoqi@0:     jlong user;
aoqi@0:   } _last_cpu_times;
aoqi@0: 
aoqi@0: #endif // OS_AIX_VM_OSTHREAD_AIX_HPP