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/*
* Copyright (c) 1997, 2006, 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.
*
*/
// This is embedded via include into the class OSThread
private:
thread_t _thread_id; // Solaris thread id
unsigned int _lwp_id; // lwp ID, only used with bound threads
sigset_t _caller_sigmask; // Caller's signal mask
bool _vm_created_thread; // true if the VM create this thread
// false if primary thread or attached thread
public:
thread_t thread_id() const { return _thread_id; }
unsigned int lwp_id() const { return _lwp_id; }
// Set and get state of _vm_created_thread flag
void set_vm_created() { _vm_created_thread = true; }
bool is_vm_created() { return _vm_created_thread; }
// 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
// On solaris reposition can fail in two ways:
// 1: a mismatched pc, because signal is delivered too late, target thread
// is resumed.
// 2: on a timeout where signal is lost, target thread is resumed.
bool valid_reposition_failure() {
// only 1 and 2 can happen and we can handle both of them
return true;
}
#endif
void set_thread_id(thread_t id) { _thread_id = id; }
void set_lwp_id(unsigned int id){ _lwp_id = id; }
// ***************************************************************
// interrupt support. interrupts (using signals) are used to get
// the thread context (get_thread_pc), to set the thread context
// (set_thread_pc), and to implement java.lang.Thread.interrupt.
// ***************************************************************
public:
class InterruptArguments : StackObj {
private:
Thread* _thread; // the thread to signal was dispatched to
ucontext_t* _ucontext; // the machine context at the time of the signal
public:
InterruptArguments(Thread* thread, ucontext_t* ucontext) {
_thread = thread;
_ucontext = ucontext;
}
Thread* thread() const { return _thread; }
ucontext_t* ucontext() const { return _ucontext; }
};
// There are currently no asynchronous callbacks - and we'd better not
// support them in the future either, as they need to be deallocated from
// the interrupt handler, which is not safe; they also require locks to
// protect the callback queue.
class Sync_Interrupt_Callback : private StackObj {
protected:
volatile bool _is_done;
Monitor* _sync;
Thread* _target;
public:
Sync_Interrupt_Callback(Monitor * sync) {
_is_done = false; _target = NULL; _sync = sync;
}
bool is_done() const { return _is_done; }
Thread* target() const { return _target; }
int interrupt(Thread * target, int timeout);
// override to implement the callback.
virtual void execute(InterruptArguments *args) = 0;
void leave_callback();
};
private:
Sync_Interrupt_Callback * volatile _current_callback;
enum {
callback_in_progress = 1
};
Mutex * _current_callback_lock; // only used on v8
public:
int set_interrupt_callback (Sync_Interrupt_Callback * cb);
void remove_interrupt_callback(Sync_Interrupt_Callback * cb);
void OSThread::do_interrupt_callbacks_at_interrupt(InterruptArguments *args);
// ***************************************************************
// java.lang.Thread.interrupt state.
// ***************************************************************
private:
JavaThreadState _saved_interrupt_thread_state; // the thread state before a system call -- restored afterward
public:
JavaThreadState saved_interrupt_thread_state() { return _saved_interrupt_thread_state; }
void set_saved_interrupt_thread_state(JavaThreadState state) { _saved_interrupt_thread_state = state; }
static void handle_spinlock_contention(int tries); // Used for thread local eden locking
// ***************************************************************
// Platform dependent initialization and cleanup
// ***************************************************************
private:
void pd_initialize();
void pd_destroy();
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