1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/os/linux/vm/osThread_linux.hpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,141 @@
1.4 +/*
1.5 + * Copyright 1999-2004 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 + private:
1.29 + int _thread_type;
1.30 +
1.31 + public:
1.32 +
1.33 + int thread_type() const {
1.34 + return _thread_type;
1.35 + }
1.36 + void set_thread_type(int type) {
1.37 + _thread_type = type;
1.38 + }
1.39 +
1.40 + private:
1.41 +
1.42 + // _thread_id is kernel thread id (similar to LWP id on Solaris). Each
1.43 + // thread has a unique thread_id (LinuxThreads or NPTL). It can be used
1.44 + // to access /proc.
1.45 + pid_t _thread_id;
1.46 +
1.47 + // _pthread_id is the pthread id, which is used by library calls
1.48 + // (e.g. pthread_kill).
1.49 + pthread_t _pthread_id;
1.50 +
1.51 + sigset_t _caller_sigmask; // Caller's signal mask
1.52 +
1.53 + public:
1.54 +
1.55 + // Methods to save/restore caller's signal mask
1.56 + sigset_t caller_sigmask() const { return _caller_sigmask; }
1.57 + void set_caller_sigmask(sigset_t sigmask) { _caller_sigmask = sigmask; }
1.58 +
1.59 + pid_t thread_id() const {
1.60 + return _thread_id;
1.61 + }
1.62 +#ifndef PRODUCT
1.63 + // Used for debugging, return a unique integer for each thread.
1.64 + int thread_identifier() const { return _thread_id; }
1.65 +#endif
1.66 +#ifdef ASSERT
1.67 + // We expect no reposition failures so kill vm if we get one.
1.68 + //
1.69 + bool valid_reposition_failure() {
1.70 + return false;
1.71 + }
1.72 +#endif // ASSERT
1.73 + void set_thread_id(pid_t id) {
1.74 + _thread_id = id;
1.75 + }
1.76 + pthread_t pthread_id() const {
1.77 + return _pthread_id;
1.78 + }
1.79 + void set_pthread_id(pthread_t tid) {
1.80 + _pthread_id = tid;
1.81 + }
1.82 +
1.83 + // ***************************************************************
1.84 + // suspension support.
1.85 + // ***************************************************************
1.86 +
1.87 +public:
1.88 + // flags that support signal based suspend/resume on Linux are in a
1.89 + // separate class to avoid confusion with many flags in OSThread that
1.90 + // are used by VM level suspend/resume.
1.91 + os::Linux::SuspendResume sr;
1.92 +
1.93 + // _ucontext and _siginfo are used by SR_handler() to save thread context,
1.94 + // and they will later be used to walk the stack or reposition thread PC.
1.95 + // If the thread is not suspended in SR_handler() (e.g. self suspend),
1.96 + // the value in _ucontext is meaningless, so we must use the last Java
1.97 + // frame information as the frame. This will mean that for threads
1.98 + // that are parked on a mutex the profiler (and safepoint mechanism)
1.99 + // will see the thread as if it were still in the Java frame. This
1.100 + // not a problem for the profiler since the Java frame is a close
1.101 + // enough result. For the safepoint mechanism when the give it the
1.102 + // Java frame we are not at a point where the safepoint needs the
1.103 + // frame to that accurate (like for a compiled safepoint) since we
1.104 + // should be in a place where we are native and will block ourselves
1.105 + // if we transition.
1.106 +private:
1.107 + void* _siginfo;
1.108 + ucontext_t* _ucontext;
1.109 + int _expanding_stack; /* non zero if manually expanding stack */
1.110 + address _alt_sig_stack; /* address of base of alternate signal stack */
1.111 +
1.112 +public:
1.113 + void* siginfo() const { return _siginfo; }
1.114 + void set_siginfo(void* ptr) { _siginfo = ptr; }
1.115 + ucontext_t* ucontext() const { return _ucontext; }
1.116 + void set_ucontext(ucontext_t* ptr) { _ucontext = ptr; }
1.117 + void set_expanding_stack(void) { _expanding_stack = 1; }
1.118 + void clear_expanding_stack(void) { _expanding_stack = 0; }
1.119 + int expanding_stack(void) { return _expanding_stack; }
1.120 +
1.121 + void set_alt_sig_stack(address val) { _alt_sig_stack = val; }
1.122 + address alt_sig_stack(void) { return _alt_sig_stack; }
1.123 +
1.124 +private:
1.125 + Monitor* _startThread_lock; // sync parent and child in thread creation
1.126 +
1.127 +public:
1.128 +
1.129 + Monitor* startThread_lock() const {
1.130 + return _startThread_lock;
1.131 + }
1.132 +
1.133 + // ***************************************************************
1.134 + // Platform dependent initialization and cleanup
1.135 + // ***************************************************************
1.136 +
1.137 +private:
1.138 +
1.139 + void pd_initialize();
1.140 + void pd_destroy();
1.141 +
1.142 +// Reconciliation History
1.143 +// osThread_solaris.hpp 1.24 99/08/27 13:11:54
1.144 +// End
