Tue, 06 Mar 2012 12:36:59 +0100
7160570: Intrinsification support for tracing framework
Reviewed-by: sla, never
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 */
25 #ifndef OS_LINUX_VM_OSTHREAD_LINUX_HPP
26 #define OS_LINUX_VM_OSTHREAD_LINUX_HPP
28 private:
29 int _thread_type;
31 public:
33 int thread_type() const {
34 return _thread_type;
35 }
36 void set_thread_type(int type) {
37 _thread_type = type;
38 }
40 private:
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;
47 // _pthread_id is the pthread id, which is used by library calls
48 // (e.g. pthread_kill).
49 pthread_t _pthread_id;
51 sigset_t _caller_sigmask; // Caller's signal mask
53 public:
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; }
59 static size_t thread_id_size() { return sizeof(pid_t); }
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 }
85 // ***************************************************************
86 // suspension support.
87 // ***************************************************************
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;
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 */
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; }
123 void set_alt_sig_stack(address val) { _alt_sig_stack = val; }
124 address alt_sig_stack(void) { return _alt_sig_stack; }
126 private:
127 Monitor* _startThread_lock; // sync parent and child in thread creation
129 public:
131 Monitor* startThread_lock() const {
132 return _startThread_lock;
133 }
135 // ***************************************************************
136 // Platform dependent initialization and cleanup
137 // ***************************************************************
139 private:
141 void pd_initialize();
142 void pd_destroy();
144 // Reconciliation History
145 // osThread_solaris.hpp 1.24 99/08/27 13:11:54
146 // End
148 #endif // OS_LINUX_VM_OSTHREAD_LINUX_HPP