Mercurial > hg > truffle
annotate src/os/linux/vm/osThread_linux.hpp @ 6080:7432b9db36ff
7165755: OS Information much longer on linux than other platforms
Reviewed-by: sla, dholmes
author | nloodin |
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date | Thu, 10 May 2012 15:44:19 +0200 |
parents | 0105f367a14c |
children | 960a442eae91 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef OS_LINUX_VM_OSTHREAD_LINUX_HPP |
26 #define OS_LINUX_VM_OSTHREAD_LINUX_HPP | |
27 | |
0 | 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 // _thread_id is kernel thread id (similar to LWP id on Solaris). Each | |
43 // thread has a unique thread_id (LinuxThreads or NPTL). It can be used | |
44 // to access /proc. | |
45 pid_t _thread_id; | |
46 | |
47 // _pthread_id is the pthread id, which is used by library calls | |
48 // (e.g. pthread_kill). | |
49 pthread_t _pthread_id; | |
50 | |
51 sigset_t _caller_sigmask; // Caller's signal mask | |
52 | |
53 public: | |
54 | |
55 // Methods to save/restore caller's signal mask | |
56 sigset_t caller_sigmask() const { return _caller_sigmask; } | |
57 void set_caller_sigmask(sigset_t sigmask) { _caller_sigmask = sigmask; } | |
58 | |
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59 static size_t thread_id_size() { return sizeof(pid_t); } |
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60 |
0 | 61 pid_t thread_id() const { |
62 return _thread_id; | |
63 } | |
64 #ifndef PRODUCT | |
65 // Used for debugging, return a unique integer for each thread. | |
66 int thread_identifier() const { return _thread_id; } | |
67 #endif | |
68 #ifdef ASSERT | |
69 // We expect no reposition failures so kill vm if we get one. | |
70 // | |
71 bool valid_reposition_failure() { | |
72 return false; | |
73 } | |
74 #endif // ASSERT | |
75 void set_thread_id(pid_t id) { | |
76 _thread_id = id; | |
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 // *************************************************************** | |
86 // suspension support. | |
87 // *************************************************************** | |
88 | |
89 public: | |
90 // flags that support signal based suspend/resume on Linux are in a | |
91 // separate class to avoid confusion with many flags in OSThread that | |
92 // are used by VM level suspend/resume. | |
93 os::Linux::SuspendResume sr; | |
94 | |
95 // _ucontext and _siginfo are used by SR_handler() to save thread context, | |
96 // and they will later be used to walk the stack or reposition thread PC. | |
97 // If the thread is not suspended in SR_handler() (e.g. self suspend), | |
98 // the value in _ucontext is meaningless, so we must use the last Java | |
99 // frame information as the frame. This will mean that for threads | |
100 // that are parked on a mutex the profiler (and safepoint mechanism) | |
101 // will see the thread as if it were still in the Java frame. This | |
102 // not a problem for the profiler since the Java frame is a close | |
103 // enough result. For the safepoint mechanism when the give it the | |
104 // Java frame we are not at a point where the safepoint needs the | |
105 // frame to that accurate (like for a compiled safepoint) since we | |
106 // should be in a place where we are native and will block ourselves | |
107 // if we transition. | |
108 private: | |
109 void* _siginfo; | |
110 ucontext_t* _ucontext; | |
111 int _expanding_stack; /* non zero if manually expanding stack */ | |
112 address _alt_sig_stack; /* address of base of alternate signal stack */ | |
113 | |
114 public: | |
115 void* siginfo() const { return _siginfo; } | |
116 void set_siginfo(void* ptr) { _siginfo = ptr; } | |
117 ucontext_t* ucontext() const { return _ucontext; } | |
118 void set_ucontext(ucontext_t* ptr) { _ucontext = ptr; } | |
119 void set_expanding_stack(void) { _expanding_stack = 1; } | |
120 void clear_expanding_stack(void) { _expanding_stack = 0; } | |
121 int expanding_stack(void) { return _expanding_stack; } | |
122 | |
123 void set_alt_sig_stack(address val) { _alt_sig_stack = val; } | |
124 address alt_sig_stack(void) { return _alt_sig_stack; } | |
125 | |
126 private: | |
127 Monitor* _startThread_lock; // sync parent and child in thread creation | |
128 | |
129 public: | |
130 | |
131 Monitor* startThread_lock() const { | |
132 return _startThread_lock; | |
133 } | |
134 | |
135 // *************************************************************** | |
136 // Platform dependent initialization and cleanup | |
137 // *************************************************************** | |
138 | |
139 private: | |
140 | |
141 void pd_initialize(); | |
142 void pd_destroy(); | |
143 | |
144 // Reconciliation History | |
145 // osThread_solaris.hpp 1.24 99/08/27 13:11:54 | |
146 // End | |
1972 | 147 |
148 #endif // OS_LINUX_VM_OSTHREAD_LINUX_HPP |