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src/os/linux/vm/osThread_linux.hpp@9c2ecc2ffb12 (annotated)

src/os/linux/vm/osThread_linux.hpp

Fri, 11 Jul 2008 01:14:44 -0700

author

trims

date

Fri, 11 Jul 2008 01:14:44 -0700

changeset 670

9c2ecc2ffb12

parent 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

Merge

duke@435	1	/*
duke@435	2	* Copyright 1999-2004 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	private:
duke@435	26	int _thread_type;
duke@435	27
duke@435	28	public:
duke@435	29
duke@435	30	int thread_type() const {
duke@435	31	return _thread_type;
duke@435	32	}
duke@435	33	void set_thread_type(int type) {
duke@435	34	_thread_type = type;
duke@435	35	}
duke@435	36
duke@435	37	private:
duke@435	38
duke@435	39	// _thread_id is kernel thread id (similar to LWP id on Solaris). Each
duke@435	40	// thread has a unique thread_id (LinuxThreads or NPTL). It can be used
duke@435	41	// to access /proc.
duke@435	42	pid_t _thread_id;
duke@435	43
duke@435	44	// _pthread_id is the pthread id, which is used by library calls
duke@435	45	// (e.g. pthread_kill).
duke@435	46	pthread_t _pthread_id;
duke@435	47
duke@435	48	sigset_t _caller_sigmask; // Caller's signal mask
duke@435	49
duke@435	50	public:
duke@435	51
duke@435	52	// Methods to save/restore caller's signal mask
duke@435	53	sigset_t caller_sigmask() const { return _caller_sigmask; }
duke@435	54	void set_caller_sigmask(sigset_t sigmask) { _caller_sigmask = sigmask; }
duke@435	55
duke@435	56	pid_t thread_id() const {
duke@435	57	return _thread_id;
duke@435	58	}
duke@435	59	#ifndef PRODUCT
duke@435	60	// Used for debugging, return a unique integer for each thread.
duke@435	61	int thread_identifier() const { return _thread_id; }
duke@435	62	#endif
duke@435	63	#ifdef ASSERT
duke@435	64	// We expect no reposition failures so kill vm if we get one.
duke@435	65	//
duke@435	66	bool valid_reposition_failure() {
duke@435	67	return false;
duke@435	68	}
duke@435	69	#endif // ASSERT
duke@435	70	void set_thread_id(pid_t id) {
duke@435	71	_thread_id = id;
duke@435	72	}
duke@435	73	pthread_t pthread_id() const {
duke@435	74	return _pthread_id;
duke@435	75	}
duke@435	76	void set_pthread_id(pthread_t tid) {
duke@435	77	_pthread_id = tid;
duke@435	78	}
duke@435	79
duke@435	80	// ***************************************************************
duke@435	81	// suspension support.
duke@435	82	// ***************************************************************
duke@435	83
duke@435	84	public:
duke@435	85	// flags that support signal based suspend/resume on Linux are in a
duke@435	86	// separate class to avoid confusion with many flags in OSThread that
duke@435	87	// are used by VM level suspend/resume.
duke@435	88	os::Linux::SuspendResume sr;
duke@435	89
duke@435	90	// _ucontext and _siginfo are used by SR_handler() to save thread context,
duke@435	91	// and they will later be used to walk the stack or reposition thread PC.
duke@435	92	// If the thread is not suspended in SR_handler() (e.g. self suspend),
duke@435	93	// the value in _ucontext is meaningless, so we must use the last Java
duke@435	94	// frame information as the frame. This will mean that for threads
duke@435	95	// that are parked on a mutex the profiler (and safepoint mechanism)
duke@435	96	// will see the thread as if it were still in the Java frame. This
duke@435	97	// not a problem for the profiler since the Java frame is a close
duke@435	98	// enough result. For the safepoint mechanism when the give it the
duke@435	99	// Java frame we are not at a point where the safepoint needs the
duke@435	100	// frame to that accurate (like for a compiled safepoint) since we
duke@435	101	// should be in a place where we are native and will block ourselves
duke@435	102	// if we transition.
duke@435	103	private:
duke@435	104	void* _siginfo;
duke@435	105	ucontext_t* _ucontext;
duke@435	106	int _expanding_stack; /* non zero if manually expanding stack */
duke@435	107	address _alt_sig_stack; /* address of base of alternate signal stack */
duke@435	108
duke@435	109	public:
duke@435	110	void* siginfo() const { return _siginfo; }
duke@435	111	void set_siginfo(void* ptr) { _siginfo = ptr; }
duke@435	112	ucontext_t* ucontext() const { return _ucontext; }
duke@435	113	void set_ucontext(ucontext_t* ptr) { _ucontext = ptr; }
duke@435	114	void set_expanding_stack(void) { _expanding_stack = 1; }
duke@435	115	void clear_expanding_stack(void) { _expanding_stack = 0; }
duke@435	116	int expanding_stack(void) { return _expanding_stack; }
duke@435	117
duke@435	118	void set_alt_sig_stack(address val) { _alt_sig_stack = val; }
duke@435	119	address alt_sig_stack(void) { return _alt_sig_stack; }
duke@435	120
duke@435	121	private:
duke@435	122	Monitor* _startThread_lock; // sync parent and child in thread creation
duke@435	123
duke@435	124	public:
duke@435	125
duke@435	126	Monitor* startThread_lock() const {
duke@435	127	return _startThread_lock;
duke@435	128	}
duke@435	129
duke@435	130	// ***************************************************************
duke@435	131	// Platform dependent initialization and cleanup
duke@435	132	// ***************************************************************
duke@435	133
duke@435	134	private:
duke@435	135
duke@435	136	void pd_initialize();
duke@435	137	void pd_destroy();
duke@435	138
duke@435	139	// Reconciliation History
duke@435	140	// osThread_solaris.hpp 1.24 99/08/27 13:11:54
duke@435	141	// End