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comparison src/os/bsd/vm/osThread_bsd.hpp @ 3960:f08d439fab8c

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7089790: integrate bsd-port changes Reviewed-by: kvn, twisti, jrose Contributed-by: Kurt Miller <kurt@intricatesoftware.com>, Greg Lewis <glewis@eyesbeyond.com>, Jung-uk Kim <jkim@freebsd.org>, Christos Zoulas <christos@zoulas.com>, Landon Fuller <landonf@plausible.coop>, The FreeBSD Foundation <board@freebsdfoundation.org>, Michael Franz <mvfranz@gmail.com>, Roger Hoover <rhoover@apple.com>, Alexander Strange <astrange@apple.com>
author never
date Sun, 25 Sep 2011 16:03:29 -0700
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children 0368109684cb
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3959:eda6988c0d81 3960:f08d439fab8c
1 /*
2 * Copyright (c) 1999, 2010, 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 _ALLBSD_SOURCE
43 // _thread_id and _pthread_id are the same on BSD
44 // keep both to minimize code divergence in os_bsd.cpp
45 pthread_t _thread_id;
46 pthread_t _pthread_id;
47 #else
48 // _thread_id is kernel thread id (similar to LWP id on Solaris). Each
49 // thread has a unique thread_id (BsdThreads or NPTL). It can be used
50 // to access /proc.
51 pid_t _thread_id;
52
53 // _pthread_id is the pthread id, which is used by library calls
54 // (e.g. pthread_kill).
55 pthread_t _pthread_id;
56 #endif
57
58 sigset_t _caller_sigmask; // Caller's signal mask
59
60 public:
61
62 // Methods to save/restore caller's signal mask
63 sigset_t caller_sigmask() const { return _caller_sigmask; }
64 void set_caller_sigmask(sigset_t sigmask) { _caller_sigmask = sigmask; }
65
66 #ifdef _ALLBSD_SOURCE
67 pthread_t thread_id() const {
68 return _thread_id;
69 }
70 #else
71 pid_t thread_id() const {
72 return _thread_id;
73 }
74 #endif
75 #ifndef PRODUCT
76 // Used for debugging, return a unique integer for each thread.
77 intptr_t thread_identifier() const { return (intptr_t)_pthread_id; }
78 #endif
79 #ifdef ASSERT
80 // We expect no reposition failures so kill vm if we get one.
81 //
82 bool valid_reposition_failure() {
83 return false;
84 }
85 #endif // ASSERT
86 #ifdef _ALLBSD_SOURCE
87 void set_thread_id(pthread_t id) {
88 _thread_id = id;
89 }
90 #else
91 void set_thread_id(pid_t id) {
92 _thread_id = id;
93 }
94 #endif
95 pthread_t pthread_id() const {
96 return _pthread_id;
97 }
98 void set_pthread_id(pthread_t tid) {
99 _pthread_id = tid;
100 }
101
102 // ***************************************************************
103 // suspension support.
104 // ***************************************************************
105
106 public:
107 // flags that support signal based suspend/resume on Bsd are in a
108 // separate class to avoid confusion with many flags in OSThread that
109 // are used by VM level suspend/resume.
110 os::Bsd::SuspendResume sr;
111
112 // _ucontext and _siginfo are used by SR_handler() to save thread context,
113 // and they will later be used to walk the stack or reposition thread PC.
114 // If the thread is not suspended in SR_handler() (e.g. self suspend),
115 // the value in _ucontext is meaningless, so we must use the last Java
116 // frame information as the frame. This will mean that for threads
117 // that are parked on a mutex the profiler (and safepoint mechanism)
118 // will see the thread as if it were still in the Java frame. This
119 // not a problem for the profiler since the Java frame is a close
120 // enough result. For the safepoint mechanism when the give it the
121 // Java frame we are not at a point where the safepoint needs the
122 // frame to that accurate (like for a compiled safepoint) since we
123 // should be in a place where we are native and will block ourselves
124 // if we transition.
125 private:
126 void* _siginfo;
127 ucontext_t* _ucontext;
128 int _expanding_stack; /* non zero if manually expanding stack */
129 address _alt_sig_stack; /* address of base of alternate signal stack */
130
131 public:
132 void* siginfo() const { return _siginfo; }
133 void set_siginfo(void* ptr) { _siginfo = ptr; }
134 ucontext_t* ucontext() const { return _ucontext; }
135 void set_ucontext(ucontext_t* ptr) { _ucontext = ptr; }
136 void set_expanding_stack(void) { _expanding_stack = 1; }
137 void clear_expanding_stack(void) { _expanding_stack = 0; }
138 int expanding_stack(void) { return _expanding_stack; }
139
140 void set_alt_sig_stack(address val) { _alt_sig_stack = val; }
141 address alt_sig_stack(void) { return _alt_sig_stack; }
142
143 private:
144 Monitor* _startThread_lock; // sync parent and child in thread creation
145
146 public:
147
148 Monitor* startThread_lock() const {
149 return _startThread_lock;
150 }
151
152 // ***************************************************************
153 // Platform dependent initialization and cleanup
154 // ***************************************************************
155
156 private:
157
158 void pd_initialize();
159 void pd_destroy();
160
161 // Reconciliation History
162 // osThread_solaris.hpp 1.24 99/08/27 13:11:54
163 // End
164
165 #endif // OS_BSD_VM_OSTHREAD_BSD_HPP