1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/os/linux/vm/osThread_linux.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,135 @@
1.4 +/*
1.5 + * Copyright (c) 1999, 2013, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef OS_LINUX_VM_OSTHREAD_LINUX_HPP
1.29 +#define OS_LINUX_VM_OSTHREAD_LINUX_HPP
1.30 + public:
1.31 + typedef pid_t thread_id_t;
1.32 +
1.33 + private:
1.34 + int _thread_type;
1.35 +
1.36 + public:
1.37 +
1.38 + int thread_type() const {
1.39 + return _thread_type;
1.40 + }
1.41 + void set_thread_type(int type) {
1.42 + _thread_type = type;
1.43 + }
1.44 +
1.45 + // _pthread_id is the pthread id, which is used by library calls
1.46 + // (e.g. pthread_kill).
1.47 + pthread_t _pthread_id;
1.48 +
1.49 + sigset_t _caller_sigmask; // Caller's signal mask
1.50 +
1.51 + public:
1.52 +
1.53 + // Methods to save/restore caller's signal mask
1.54 + sigset_t caller_sigmask() const { return _caller_sigmask; }
1.55 + void set_caller_sigmask(sigset_t sigmask) { _caller_sigmask = sigmask; }
1.56 +
1.57 +#ifndef PRODUCT
1.58 + // Used for debugging, return a unique integer for each thread.
1.59 + int thread_identifier() const { return _thread_id; }
1.60 +#endif
1.61 +#ifdef ASSERT
1.62 + // We expect no reposition failures so kill vm if we get one.
1.63 + //
1.64 + bool valid_reposition_failure() {
1.65 + return false;
1.66 + }
1.67 +#endif // ASSERT
1.68 + pthread_t pthread_id() const {
1.69 + return _pthread_id;
1.70 + }
1.71 + void set_pthread_id(pthread_t tid) {
1.72 + _pthread_id = tid;
1.73 + }
1.74 +
1.75 + // ***************************************************************
1.76 + // suspension support.
1.77 + // ***************************************************************
1.78 +
1.79 +public:
1.80 + // flags that support signal based suspend/resume on Linux are in a
1.81 + // separate class to avoid confusion with many flags in OSThread that
1.82 + // are used by VM level suspend/resume.
1.83 + os::SuspendResume sr;
1.84 +
1.85 + // _ucontext and _siginfo are used by SR_handler() to save thread context,
1.86 + // and they will later be used to walk the stack or reposition thread PC.
1.87 + // If the thread is not suspended in SR_handler() (e.g. self suspend),
1.88 + // the value in _ucontext is meaningless, so we must use the last Java
1.89 + // frame information as the frame. This will mean that for threads
1.90 + // that are parked on a mutex the profiler (and safepoint mechanism)
1.91 + // will see the thread as if it were still in the Java frame. This
1.92 + // not a problem for the profiler since the Java frame is a close
1.93 + // enough result. For the safepoint mechanism when the give it the
1.94 + // Java frame we are not at a point where the safepoint needs the
1.95 + // frame to that accurate (like for a compiled safepoint) since we
1.96 + // should be in a place where we are native and will block ourselves
1.97 + // if we transition.
1.98 +private:
1.99 + void* _siginfo;
1.100 + ucontext_t* _ucontext;
1.101 + int _expanding_stack; /* non zero if manually expanding stack */
1.102 + address _alt_sig_stack; /* address of base of alternate signal stack */
1.103 +
1.104 +public:
1.105 + void* siginfo() const { return _siginfo; }
1.106 + void set_siginfo(void* ptr) { _siginfo = ptr; }
1.107 + ucontext_t* ucontext() const { return _ucontext; }
1.108 + void set_ucontext(ucontext_t* ptr) { _ucontext = ptr; }
1.109 + void set_expanding_stack(void) { _expanding_stack = 1; }
1.110 + void clear_expanding_stack(void) { _expanding_stack = 0; }
1.111 + int expanding_stack(void) { return _expanding_stack; }
1.112 +
1.113 + void set_alt_sig_stack(address val) { _alt_sig_stack = val; }
1.114 + address alt_sig_stack(void) { return _alt_sig_stack; }
1.115 +
1.116 +private:
1.117 + Monitor* _startThread_lock; // sync parent and child in thread creation
1.118 +
1.119 +public:
1.120 +
1.121 + Monitor* startThread_lock() const {
1.122 + return _startThread_lock;
1.123 + }
1.124 +
1.125 + // ***************************************************************
1.126 + // Platform dependent initialization and cleanup
1.127 + // ***************************************************************
1.128 +
1.129 +private:
1.130 +
1.131 + void pd_initialize();
1.132 + void pd_destroy();
1.133 +
1.134 +// Reconciliation History
1.135 +// osThread_solaris.hpp 1.24 99/08/27 13:11:54
1.136 +// End
1.137 +
1.138 +#endif // OS_LINUX_VM_OSTHREAD_LINUX_HPP
