| /* |
| * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef OS_LINUX_VM_OSTHREAD_LINUX_HPP |
| #define OS_LINUX_VM_OSTHREAD_LINUX_HPP |
| public: |
| typedef pid_t thread_id_t; |
| |
| private: |
| int _thread_type; |
| |
| public: |
| |
| int thread_type() const { |
| return _thread_type; |
| } |
| void set_thread_type(int type) { |
| _thread_type = type; |
| } |
| |
| // _pthread_id is the pthread id, which is used by library calls |
| // (e.g. pthread_kill). |
| pthread_t _pthread_id; |
| |
| sigset_t _caller_sigmask; // Caller's signal mask |
| |
| public: |
| |
| // Methods to save/restore caller's signal mask |
| sigset_t caller_sigmask() const { return _caller_sigmask; } |
| void set_caller_sigmask(sigset_t sigmask) { _caller_sigmask = sigmask; } |
| |
| #ifndef PRODUCT |
| // Used for debugging, return a unique integer for each thread. |
| int thread_identifier() const { return _thread_id; } |
| #endif |
| #ifdef ASSERT |
| // We expect no reposition failures so kill vm if we get one. |
| // |
| bool valid_reposition_failure() { |
| return false; |
| } |
| #endif // ASSERT |
| pthread_t pthread_id() const { |
| return _pthread_id; |
| } |
| void set_pthread_id(pthread_t tid) { |
| _pthread_id = tid; |
| } |
| |
| // *************************************************************** |
| // suspension support. |
| // *************************************************************** |
| |
| public: |
| // flags that support signal based suspend/resume on Linux are in a |
| // separate class to avoid confusion with many flags in OSThread that |
| // are used by VM level suspend/resume. |
| os::SuspendResume sr; |
| |
| // _ucontext and _siginfo are used by SR_handler() to save thread context, |
| // and they will later be used to walk the stack or reposition thread PC. |
| // If the thread is not suspended in SR_handler() (e.g. self suspend), |
| // the value in _ucontext is meaningless, so we must use the last Java |
| // frame information as the frame. This will mean that for threads |
| // that are parked on a mutex the profiler (and safepoint mechanism) |
| // will see the thread as if it were still in the Java frame. This |
| // not a problem for the profiler since the Java frame is a close |
| // enough result. For the safepoint mechanism when the give it the |
| // Java frame we are not at a point where the safepoint needs the |
| // frame to that accurate (like for a compiled safepoint) since we |
| // should be in a place where we are native and will block ourselves |
| // if we transition. |
| private: |
| void* _siginfo; |
| ucontext_t* _ucontext; |
| int _expanding_stack; /* non zero if manually expanding stack */ |
| address _alt_sig_stack; /* address of base of alternate signal stack */ |
| |
| public: |
| void* siginfo() const { return _siginfo; } |
| void set_siginfo(void* ptr) { _siginfo = ptr; } |
| ucontext_t* ucontext() const { return _ucontext; } |
| void set_ucontext(ucontext_t* ptr) { _ucontext = ptr; } |
| void set_expanding_stack(void) { _expanding_stack = 1; } |
| void clear_expanding_stack(void) { _expanding_stack = 0; } |
| int expanding_stack(void) { return _expanding_stack; } |
| |
| void set_alt_sig_stack(address val) { _alt_sig_stack = val; } |
| address alt_sig_stack(void) { return _alt_sig_stack; } |
| |
| private: |
| Monitor* _startThread_lock; // sync parent and child in thread creation |
| |
| public: |
| |
| Monitor* startThread_lock() const { |
| return _startThread_lock; |
| } |
| |
| // *************************************************************** |
| // Platform dependent initialization and cleanup |
| // *************************************************************** |
| |
| private: |
| |
| void pd_initialize(); |
| void pd_destroy(); |
| |
| // Reconciliation History |
| // osThread_solaris.hpp 1.24 99/08/27 13:11:54 |
| // End |
| |
| #endif // OS_LINUX_VM_OSTHREAD_LINUX_HPP |