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annotate src/os/linux/vm/osThread_linux.hpp @ 3598:9fe4191f46af
IdealGraphVisualizer: Try to resolve UI concurrency issues by introducing locking for the list of graphs in Group and adding graphs to their group only after they have been fully read in.
| author | Peter Hofer <peter.hofer@jku.at> |
|---|---|
| date | Wed, 19 Oct 2011 17:49:28 +0200 |
| parents | f95d63e2154a |
| children | 0105f367a14c |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1999, 2010, 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 | |
| 59 pid_t thread_id() const { | |
| 60 return _thread_id; | |
| 61 } | |
| 62 #ifndef PRODUCT | |
| 63 // Used for debugging, return a unique integer for each thread. | |
| 64 int thread_identifier() const { return _thread_id; } | |
| 65 #endif | |
| 66 #ifdef ASSERT | |
| 67 // We expect no reposition failures so kill vm if we get one. | |
| 68 // | |
| 69 bool valid_reposition_failure() { | |
| 70 return false; | |
| 71 } | |
| 72 #endif // ASSERT | |
| 73 void set_thread_id(pid_t id) { | |
| 74 _thread_id = id; | |
| 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 // *************************************************************** | |
| 84 // suspension support. | |
| 85 // *************************************************************** | |
| 86 | |
| 87 public: | |
| 88 // flags that support signal based suspend/resume on Linux are in a | |
| 89 // separate class to avoid confusion with many flags in OSThread that | |
| 90 // are used by VM level suspend/resume. | |
| 91 os::Linux::SuspendResume sr; | |
| 92 | |
| 93 // _ucontext and _siginfo are used by SR_handler() to save thread context, | |
| 94 // and they will later be used to walk the stack or reposition thread PC. | |
| 95 // If the thread is not suspended in SR_handler() (e.g. self suspend), | |
| 96 // the value in _ucontext is meaningless, so we must use the last Java | |
| 97 // frame information as the frame. This will mean that for threads | |
| 98 // that are parked on a mutex the profiler (and safepoint mechanism) | |
| 99 // will see the thread as if it were still in the Java frame. This | |
| 100 // not a problem for the profiler since the Java frame is a close | |
| 101 // enough result. For the safepoint mechanism when the give it the | |
| 102 // Java frame we are not at a point where the safepoint needs the | |
| 103 // frame to that accurate (like for a compiled safepoint) since we | |
| 104 // should be in a place where we are native and will block ourselves | |
| 105 // if we transition. | |
| 106 private: | |
| 107 void* _siginfo; | |
| 108 ucontext_t* _ucontext; | |
| 109 int _expanding_stack; /* non zero if manually expanding stack */ | |
| 110 address _alt_sig_stack; /* address of base of alternate signal stack */ | |
| 111 | |
| 112 public: | |
| 113 void* siginfo() const { return _siginfo; } | |
| 114 void set_siginfo(void* ptr) { _siginfo = ptr; } | |
| 115 ucontext_t* ucontext() const { return _ucontext; } | |
| 116 void set_ucontext(ucontext_t* ptr) { _ucontext = ptr; } | |
| 117 void set_expanding_stack(void) { _expanding_stack = 1; } | |
| 118 void clear_expanding_stack(void) { _expanding_stack = 0; } | |
| 119 int expanding_stack(void) { return _expanding_stack; } | |
| 120 | |
| 121 void set_alt_sig_stack(address val) { _alt_sig_stack = val; } | |
| 122 address alt_sig_stack(void) { return _alt_sig_stack; } | |
| 123 | |
| 124 private: | |
| 125 Monitor* _startThread_lock; // sync parent and child in thread creation | |
| 126 | |
| 127 public: | |
| 128 | |
| 129 Monitor* startThread_lock() const { | |
| 130 return _startThread_lock; | |
| 131 } | |
| 132 | |
| 133 // *************************************************************** | |
| 134 // Platform dependent initialization and cleanup | |
| 135 // *************************************************************** | |
| 136 | |
| 137 private: | |
| 138 | |
| 139 void pd_initialize(); | |
| 140 void pd_destroy(); | |
| 141 | |
| 142 // Reconciliation History | |
| 143 // osThread_solaris.hpp 1.24 99/08/27 13:11:54 | |
| 144 // End | |
| 1972 | 145 |
| 146 #endif // OS_LINUX_VM_OSTHREAD_LINUX_HPP |