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
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::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.
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