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comparison src/os/linux/vm/osThread_linux.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 1999-2004 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 private:
26 int _thread_type;
27
28 public:
29
30 int thread_type() const {
31 return _thread_type;
32 }
33 void set_thread_type(int type) {
34 _thread_type = type;
35 }
36
37 private:
38
39 // _thread_id is kernel thread id (similar to LWP id on Solaris). Each
40 // thread has a unique thread_id (LinuxThreads or NPTL). It can be used
41 // to access /proc.
42 pid_t _thread_id;
43
44 // _pthread_id is the pthread id, which is used by library calls
45 // (e.g. pthread_kill).
46 pthread_t _pthread_id;
47
48 sigset_t _caller_sigmask; // Caller's signal mask
49
50 public:
51
52 // Methods to save/restore caller's signal mask
53 sigset_t caller_sigmask() const { return _caller_sigmask; }
54 void set_caller_sigmask(sigset_t sigmask) { _caller_sigmask = sigmask; }
55
56 pid_t thread_id() const {
57 return _thread_id;
58 }
59 #ifndef PRODUCT
60 // Used for debugging, return a unique integer for each thread.
61 int thread_identifier() const { return _thread_id; }
62 #endif
63 #ifdef ASSERT
64 // We expect no reposition failures so kill vm if we get one.
65 //
66 bool valid_reposition_failure() {
67 return false;
68 }
69 #endif // ASSERT
70 void set_thread_id(pid_t id) {
71 _thread_id = id;
72 }
73 pthread_t pthread_id() const {
74 return _pthread_id;
75 }
76 void set_pthread_id(pthread_t tid) {
77 _pthread_id = tid;
78 }
79
80 // ***************************************************************
81 // suspension support.
82 // ***************************************************************
83
84 public:
85 // flags that support signal based suspend/resume on Linux are in a
86 // separate class to avoid confusion with many flags in OSThread that
87 // are used by VM level suspend/resume.
88 os::Linux::SuspendResume sr;
89
90 // _ucontext and _siginfo are used by SR_handler() to save thread context,
91 // and they will later be used to walk the stack or reposition thread PC.
92 // If the thread is not suspended in SR_handler() (e.g. self suspend),
93 // the value in _ucontext is meaningless, so we must use the last Java
94 // frame information as the frame. This will mean that for threads
95 // that are parked on a mutex the profiler (and safepoint mechanism)
96 // will see the thread as if it were still in the Java frame. This
97 // not a problem for the profiler since the Java frame is a close
98 // enough result. For the safepoint mechanism when the give it the
99 // Java frame we are not at a point where the safepoint needs the
100 // frame to that accurate (like for a compiled safepoint) since we
101 // should be in a place where we are native and will block ourselves
102 // if we transition.
103 private:
104 void* _siginfo;
105 ucontext_t* _ucontext;
106 int _expanding_stack; /* non zero if manually expanding stack */
107 address _alt_sig_stack; /* address of base of alternate signal stack */
108
109 public:
110 void* siginfo() const { return _siginfo; }
111 void set_siginfo(void* ptr) { _siginfo = ptr; }
112 ucontext_t* ucontext() const { return _ucontext; }
113 void set_ucontext(ucontext_t* ptr) { _ucontext = ptr; }
114 void set_expanding_stack(void) { _expanding_stack = 1; }
115 void clear_expanding_stack(void) { _expanding_stack = 0; }
116 int expanding_stack(void) { return _expanding_stack; }
117
118 void set_alt_sig_stack(address val) { _alt_sig_stack = val; }
119 address alt_sig_stack(void) { return _alt_sig_stack; }
120
121 private:
122 Monitor* _startThread_lock; // sync parent and child in thread creation
123
124 public:
125
126 Monitor* startThread_lock() const {
127 return _startThread_lock;
128 }
129
130 // ***************************************************************
131 // Platform dependent initialization and cleanup
132 // ***************************************************************
133
134 private:
135
136 void pd_initialize();
137 void pd_destroy();
138
139 // Reconciliation History
140 // osThread_solaris.hpp 1.24 99/08/27 13:11:54
141 // End