osThread_bsd.hpp revision 4129:758935f7c23f 
1/*
2 * Copyright (c) 1999, 2012, 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
93public:
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::Bsd::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.
112private:
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
118public:
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
130private:
131  Monitor* _startThread_lock;     // sync parent and child in thread creation
132
133public:
134
135  Monitor* startThread_lock() const {
136    return _startThread_lock;
137  }
138
139  // ***************************************************************
140  // Platform dependent initialization and cleanup
141  // ***************************************************************
142
143private:
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
153