1 /* 2 * Copyright (c) 1999, 2013, 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 __APPLE__ 43 typedef thread_t thread_id_t; 44 #else 45 typedef pid_t thread_id_t; 46 #endif 47 48 // _pthread_id is the pthread id, which is used by library calls 49 // (e.g. pthread_kill). 50 pthread_t _pthread_id; 51 52 // This is the "thread_id" from struct thread_identifier_info. According to a 53 // comment in thread_info.h, this is a "system-wide unique 64-bit thread id". 54 // The value is used by SA to correlate threads. 55 uint64_t _unique_thread_id; 56 57 sigset_t _caller_sigmask; // Caller's signal mask 58 59 public: 60 61 // Methods to save/restore caller's signal mask 62 sigset_t caller_sigmask() const { return _caller_sigmask; } 63 void set_caller_sigmask(sigset_t sigmask) { _caller_sigmask = sigmask; } 64 65 // unique integer for each thread 66 intptr_t thread_identifier() const { return (intptr_t)_pthread_id; } 67 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 76 pthread_t pthread_id() const { 77 return _pthread_id; 78 } 79 void set_pthread_id(pthread_t tid) { 80 _pthread_id = tid; 81 } 82 83 void set_unique_thread_id(uint64_t id) { 84 _unique_thread_id = id; 85 } 86 87 // *************************************************************** 88 // suspension support. 89 // *************************************************************** 90 91 public: 92 // flags that support signal based suspend/resume on Bsd are in a 93 // separate class to avoid confusion with many flags in OSThread that 94 // are used by VM level suspend/resume. 95 os::SuspendResume sr; 96 97 // _ucontext and _siginfo are used by SR_handler() to save thread context, 98 // and they will later be used to walk the stack or reposition thread PC. 99 // If the thread is not suspended in SR_handler() (e.g. self suspend), 100 // the value in _ucontext is meaningless, so we must use the last Java 101 // frame information as the frame. This will mean that for threads 102 // that are parked on a mutex the profiler (and safepoint mechanism) 103 // will see the thread as if it were still in the Java frame. This 104 // not a problem for the profiler since the Java frame is a close 105 // enough result. For the safepoint mechanism when the give it the 106 // Java frame we are not at a point where the safepoint needs the 107 // frame to that accurate (like for a compiled safepoint) since we 108 // should be in a place where we are native and will block ourselves 109 // if we transition. 110 private: 111 void* _siginfo; 112 ucontext_t* _ucontext; 113 int _expanding_stack; /* non zero if manually expanding stack */ 114 address _alt_sig_stack; /* address of base of alternate signal stack */ 115 116 public: 117 void* siginfo() const { return _siginfo; } 118 void set_siginfo(void* ptr) { _siginfo = ptr; } 119 ucontext_t* ucontext() const { return _ucontext; } 120 void set_ucontext(ucontext_t* ptr) { _ucontext = ptr; } 121 void set_expanding_stack(void) { _expanding_stack = 1; } 122 void clear_expanding_stack(void) { _expanding_stack = 0; } 123 int expanding_stack(void) { return _expanding_stack; } 124 125 void set_alt_sig_stack(address val) { _alt_sig_stack = val; } 126 address alt_sig_stack(void) { return _alt_sig_stack; } 127 128 private: 129 Monitor* _startThread_lock; // sync parent and child in thread creation 130 131 public: 132 133 Monitor* startThread_lock() const { 134 return _startThread_lock; 135 } 136 137 // *************************************************************** 138 // Platform dependent initialization and cleanup 139 // *************************************************************** 140 141 private: 142 143 void pd_initialize(); 144 void pd_destroy(); 145 146 // Reconciliation History 147 // osThread_solaris.hpp 1.24 99/08/27 13:11:54 148 // End 149 150 #endif // OS_BSD_VM_OSTHREAD_BSD_HPP