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comparison src/os/aix/vm/osThread_aix.hpp @ 14415:666e6ce3976c
8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
Reviewed-by: kvn
author | simonis |
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date | Fri, 06 Sep 2013 20:16:09 +0200 |
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14414:b83f7d608548 | 14415:666e6ce3976c |
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1 /* | |
2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. | |
3 * Copyright 2012, 2013 SAP AG. All rights reserved. | |
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
5 * | |
6 * This code is free software; you can redistribute it and/or modify it | |
7 * under the terms of the GNU General Public License version 2 only, as | |
8 * published by the Free Software Foundation. | |
9 * | |
10 * This code is distributed in the hope that it will be useful, but WITHOUT | |
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
13 * version 2 for more details (a copy is included in the LICENSE file that | |
14 * accompanied this code). | |
15 * | |
16 * You should have received a copy of the GNU General Public License version | |
17 * 2 along with this work; if not, write to the Free Software Foundation, | |
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
19 * | |
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
21 * or visit www.oracle.com if you need additional information or have any | |
22 * questions. | |
23 * | |
24 */ | |
25 | |
26 #ifndef OS_AIX_VM_OSTHREAD_AIX_HPP | |
27 #define OS_AIX_VM_OSTHREAD_AIX_HPP | |
28 | |
29 public: | |
30 typedef pid_t thread_id_t; | |
31 | |
32 private: | |
33 int _thread_type; | |
34 | |
35 public: | |
36 | |
37 int thread_type() const { | |
38 return _thread_type; | |
39 } | |
40 void set_thread_type(int type) { | |
41 _thread_type = type; | |
42 } | |
43 | |
44 private: | |
45 | |
46 // _pthread_id is the pthread id, which is used by library calls | |
47 // (e.g. pthread_kill). | |
48 pthread_t _pthread_id; | |
49 | |
50 sigset_t _caller_sigmask; // Caller's signal mask | |
51 | |
52 public: | |
53 | |
54 // Methods to save/restore caller's signal mask | |
55 sigset_t caller_sigmask() const { return _caller_sigmask; } | |
56 void set_caller_sigmask(sigset_t sigmask) { _caller_sigmask = sigmask; } | |
57 | |
58 #ifndef PRODUCT | |
59 // Used for debugging, return a unique integer for each thread. | |
60 int thread_identifier() const { return _thread_id; } | |
61 #endif | |
62 #ifdef ASSERT | |
63 // We expect no reposition failures so kill vm if we get one. | |
64 // | |
65 bool valid_reposition_failure() { | |
66 return false; | |
67 } | |
68 #endif // ASSERT | |
69 pthread_t pthread_id() const { | |
70 return _pthread_id; | |
71 } | |
72 void set_pthread_id(pthread_t tid) { | |
73 _pthread_id = tid; | |
74 } | |
75 | |
76 // *************************************************************** | |
77 // suspension support. | |
78 // *************************************************************** | |
79 | |
80 public: | |
81 // flags that support signal based suspend/resume on Linux are in a | |
82 // separate class to avoid confusion with many flags in OSThread that | |
83 // are used by VM level suspend/resume. | |
84 os::SuspendResume sr; | |
85 | |
86 // _ucontext and _siginfo are used by SR_handler() to save thread context, | |
87 // and they will later be used to walk the stack or reposition thread PC. | |
88 // If the thread is not suspended in SR_handler() (e.g. self suspend), | |
89 // the value in _ucontext is meaningless, so we must use the last Java | |
90 // frame information as the frame. This will mean that for threads | |
91 // that are parked on a mutex the profiler (and safepoint mechanism) | |
92 // will see the thread as if it were still in the Java frame. This | |
93 // not a problem for the profiler since the Java frame is a close | |
94 // enough result. For the safepoint mechanism when the give it the | |
95 // Java frame we are not at a point where the safepoint needs the | |
96 // frame to that accurate (like for a compiled safepoint) since we | |
97 // should be in a place where we are native and will block ourselves | |
98 // if we transition. | |
99 private: | |
100 void* _siginfo; | |
101 ucontext_t* _ucontext; | |
102 int _expanding_stack; // non zero if manually expanding stack | |
103 address _alt_sig_stack; // address of base of alternate signal stack | |
104 | |
105 public: | |
106 void* siginfo() const { return _siginfo; } | |
107 void set_siginfo(void* ptr) { _siginfo = ptr; } | |
108 ucontext_t* ucontext() const { return _ucontext; } | |
109 void set_ucontext(ucontext_t* ptr) { _ucontext = ptr; } | |
110 void set_expanding_stack(void) { _expanding_stack = 1; } | |
111 void clear_expanding_stack(void) { _expanding_stack = 0; } | |
112 int expanding_stack(void) { return _expanding_stack; } | |
113 | |
114 void set_alt_sig_stack(address val) { _alt_sig_stack = val; } | |
115 address alt_sig_stack(void) { return _alt_sig_stack; } | |
116 | |
117 private: | |
118 Monitor* _startThread_lock; // sync parent and child in thread creation | |
119 | |
120 public: | |
121 | |
122 Monitor* startThread_lock() const { | |
123 return _startThread_lock; | |
124 } | |
125 | |
126 // *************************************************************** | |
127 // Platform dependent initialization and cleanup | |
128 // *************************************************************** | |
129 | |
130 private: | |
131 | |
132 void pd_initialize(); | |
133 void pd_destroy(); | |
134 | |
135 public: | |
136 | |
137 // The last measured values of cpu timing to prevent the "stale | |
138 // value return" bug in thread_cpu_time. | |
139 volatile struct { | |
140 jlong sys; | |
141 jlong user; | |
142 } _last_cpu_times; | |
143 | |
144 #endif // OS_AIX_VM_OSTHREAD_AIX_HPP |