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src/os/linux/vm/osThread_linux.hpp@ddce0b7cee93 (annotated)

src/os/linux/vm/osThread_linux.hpp

Tue, 24 Feb 2015 15:04:52 -0500

author

dlong

date

Tue, 24 Feb 2015 15:04:52 -0500

changeset 7598

ddce0b7cee93

parent 5237

f2110083203d

child 6876

710a3c8b516e

permissions

-rw-r--r--

8072383: resolve conflicts between open and closed ports
Summary: refactor close to remove references to closed ports
Reviewed-by: kvn, simonis, sgehwolf, dholmes

duke@435	1	/*
sla@5237	2	* Copyright (c) 1999, 2013, Oracle and/or its affiliates. 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	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#ifndef OS_LINUX_VM_OSTHREAD_LINUX_HPP
stefank@2314	26	#define OS_LINUX_VM_OSTHREAD_LINUX_HPP
rbackman@3796	27	public:
rbackman@3796	28	typedef pid_t thread_id_t;
stefank@2314	29
duke@435	30	private:
duke@435	31	int _thread_type;
duke@435	32
duke@435	33	public:
duke@435	34
duke@435	35	int thread_type() const {
duke@435	36	return _thread_type;
duke@435	37	}
duke@435	38	void set_thread_type(int type) {
duke@435	39	_thread_type = type;
duke@435	40	}
duke@435	41
duke@435	42	// _pthread_id is the pthread id, which is used by library calls
duke@435	43	// (e.g. pthread_kill).
duke@435	44	pthread_t _pthread_id;
duke@435	45
duke@435	46	sigset_t _caller_sigmask; // Caller's signal mask
duke@435	47
duke@435	48	public:
duke@435	49
duke@435	50	// Methods to save/restore caller's signal mask
duke@435	51	sigset_t caller_sigmask() const { return _caller_sigmask; }
duke@435	52	void set_caller_sigmask(sigset_t sigmask) { _caller_sigmask = sigmask; }
duke@435	53
duke@435	54	#ifndef PRODUCT
duke@435	55	// Used for debugging, return a unique integer for each thread.
duke@435	56	int thread_identifier() const { return _thread_id; }
duke@435	57	#endif
duke@435	58	#ifdef ASSERT
duke@435	59	// We expect no reposition failures so kill vm if we get one.
duke@435	60	//
duke@435	61	bool valid_reposition_failure() {
duke@435	62	return false;
duke@435	63	}
duke@435	64	#endif // ASSERT
duke@435	65	pthread_t pthread_id() const {
duke@435	66	return _pthread_id;
duke@435	67	}
duke@435	68	void set_pthread_id(pthread_t tid) {
duke@435	69	_pthread_id = tid;
duke@435	70	}
duke@435	71
duke@435	72	// ***************************************************************
duke@435	73	// suspension support.
duke@435	74	// ***************************************************************
duke@435	75
duke@435	76	public:
duke@435	77	// flags that support signal based suspend/resume on Linux are in a
duke@435	78	// separate class to avoid confusion with many flags in OSThread that
duke@435	79	// are used by VM level suspend/resume.
sla@5237	80	os::SuspendResume sr;
duke@435	81
duke@435	82	// _ucontext and _siginfo are used by SR_handler() to save thread context,
duke@435	83	// and they will later be used to walk the stack or reposition thread PC.
duke@435	84	// If the thread is not suspended in SR_handler() (e.g. self suspend),
duke@435	85	// the value in _ucontext is meaningless, so we must use the last Java
duke@435	86	// frame information as the frame. This will mean that for threads
duke@435	87	// that are parked on a mutex the profiler (and safepoint mechanism)
duke@435	88	// will see the thread as if it were still in the Java frame. This
duke@435	89	// not a problem for the profiler since the Java frame is a close
duke@435	90	// enough result. For the safepoint mechanism when the give it the
duke@435	91	// Java frame we are not at a point where the safepoint needs the
duke@435	92	// frame to that accurate (like for a compiled safepoint) since we
duke@435	93	// should be in a place where we are native and will block ourselves
duke@435	94	// if we transition.
duke@435	95	private:
duke@435	96	void* _siginfo;
duke@435	97	ucontext_t* _ucontext;
duke@435	98	int _expanding_stack; /* non zero if manually expanding stack */
duke@435	99	address _alt_sig_stack; /* address of base of alternate signal stack */
duke@435	100
duke@435	101	public:
duke@435	102	void* siginfo() const { return _siginfo; }
duke@435	103	void set_siginfo(void* ptr) { _siginfo = ptr; }
duke@435	104	ucontext_t* ucontext() const { return _ucontext; }
duke@435	105	void set_ucontext(ucontext_t* ptr) { _ucontext = ptr; }
duke@435	106	void set_expanding_stack(void) { _expanding_stack = 1; }
duke@435	107	void clear_expanding_stack(void) { _expanding_stack = 0; }
duke@435	108	int expanding_stack(void) { return _expanding_stack; }
duke@435	109
duke@435	110	void set_alt_sig_stack(address val) { _alt_sig_stack = val; }
duke@435	111	address alt_sig_stack(void) { return _alt_sig_stack; }
duke@435	112
duke@435	113	private:
duke@435	114	Monitor* _startThread_lock; // sync parent and child in thread creation
duke@435	115
duke@435	116	public:
duke@435	117
duke@435	118	Monitor* startThread_lock() const {
duke@435	119	return _startThread_lock;
duke@435	120	}
duke@435	121
duke@435	122	// ***************************************************************
duke@435	123	// Platform dependent initialization and cleanup
duke@435	124	// ***************************************************************
duke@435	125
duke@435	126	private:
duke@435	127
duke@435	128	void pd_initialize();
duke@435	129	void pd_destroy();
duke@435	130
duke@435	131	// Reconciliation History
duke@435	132	// osThread_solaris.hpp 1.24 99/08/27 13:11:54
duke@435	133	// End
stefank@2314	134
stefank@2314	135	#endif // OS_LINUX_VM_OSTHREAD_LINUX_HPP