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