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src/os/linux/vm/osThread_linux.hpp@f90c822e73f8 (annotated)

src/os/linux/vm/osThread_linux.hpp

Wed, 27 Apr 2016 01:25:04 +0800

author

aoqi

date

Wed, 27 Apr 2016 01:25:04 +0800

changeset 0

f90c822e73f8

child 6876

710a3c8b516e

permissions

-rw-r--r--

Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#ifndef OS_LINUX_VM_OSTHREAD_LINUX_HPP
aoqi@0	26	#define OS_LINUX_VM_OSTHREAD_LINUX_HPP
aoqi@0	27	public:
aoqi@0	28	typedef pid_t thread_id_t;
aoqi@0	29
aoqi@0	30	private:
aoqi@0	31	int _thread_type;
aoqi@0	32
aoqi@0	33	public:
aoqi@0	34
aoqi@0	35	int thread_type() const {
aoqi@0	36	return _thread_type;
aoqi@0	37	}
aoqi@0	38	void set_thread_type(int type) {
aoqi@0	39	_thread_type = type;
aoqi@0	40	}
aoqi@0	41
aoqi@0	42	// _pthread_id is the pthread id, which is used by library calls
aoqi@0	43	// (e.g. pthread_kill).
aoqi@0	44	pthread_t _pthread_id;
aoqi@0	45
aoqi@0	46	sigset_t _caller_sigmask; // Caller's signal mask
aoqi@0	47
aoqi@0	48	public:
aoqi@0	49
aoqi@0	50	// Methods to save/restore caller's signal mask
aoqi@0	51	sigset_t caller_sigmask() const { return _caller_sigmask; }
aoqi@0	52	void set_caller_sigmask(sigset_t sigmask) { _caller_sigmask = sigmask; }
aoqi@0	53
aoqi@0	54	#ifndef PRODUCT
aoqi@0	55	// Used for debugging, return a unique integer for each thread.
aoqi@0	56	int thread_identifier() const { return _thread_id; }
aoqi@0	57	#endif
aoqi@0	58	#ifdef ASSERT
aoqi@0	59	// We expect no reposition failures so kill vm if we get one.
aoqi@0	60	//
aoqi@0	61	bool valid_reposition_failure() {
aoqi@0	62	return false;
aoqi@0	63	}
aoqi@0	64	#endif // ASSERT
aoqi@0	65	pthread_t pthread_id() const {
aoqi@0	66	return _pthread_id;
aoqi@0	67	}
aoqi@0	68	void set_pthread_id(pthread_t tid) {
aoqi@0	69	_pthread_id = tid;
aoqi@0	70	}
aoqi@0	71
aoqi@0	72	// ***************************************************************
aoqi@0	73	// suspension support.
aoqi@0	74	// ***************************************************************
aoqi@0	75
aoqi@0	76	public:
aoqi@0	77	// flags that support signal based suspend/resume on Linux are in a
aoqi@0	78	// separate class to avoid confusion with many flags in OSThread that
aoqi@0	79	// are used by VM level suspend/resume.
aoqi@0	80	os::SuspendResume sr;
aoqi@0	81
aoqi@0	82	// _ucontext and _siginfo are used by SR_handler() to save thread context,
aoqi@0	83	// and they will later be used to walk the stack or reposition thread PC.
aoqi@0	84	// If the thread is not suspended in SR_handler() (e.g. self suspend),
aoqi@0	85	// the value in _ucontext is meaningless, so we must use the last Java
aoqi@0	86	// frame information as the frame. This will mean that for threads
aoqi@0	87	// that are parked on a mutex the profiler (and safepoint mechanism)
aoqi@0	88	// will see the thread as if it were still in the Java frame. This
aoqi@0	89	// not a problem for the profiler since the Java frame is a close
aoqi@0	90	// enough result. For the safepoint mechanism when the give it the
aoqi@0	91	// Java frame we are not at a point where the safepoint needs the
aoqi@0	92	// frame to that accurate (like for a compiled safepoint) since we
aoqi@0	93	// should be in a place where we are native and will block ourselves
aoqi@0	94	// if we transition.
aoqi@0	95	private:
aoqi@0	96	void* _siginfo;
aoqi@0	97	ucontext_t* _ucontext;
aoqi@0	98	int _expanding_stack; /* non zero if manually expanding stack */
aoqi@0	99	address _alt_sig_stack; /* address of base of alternate signal stack */
aoqi@0	100
aoqi@0	101	public:
aoqi@0	102	void* siginfo() const { return _siginfo; }
aoqi@0	103	void set_siginfo(void* ptr) { _siginfo = ptr; }
aoqi@0	104	ucontext_t* ucontext() const { return _ucontext; }
aoqi@0	105	void set_ucontext(ucontext_t* ptr) { _ucontext = ptr; }
aoqi@0	106	void set_expanding_stack(void) { _expanding_stack = 1; }
aoqi@0	107	void clear_expanding_stack(void) { _expanding_stack = 0; }
aoqi@0	108	int expanding_stack(void) { return _expanding_stack; }
aoqi@0	109
aoqi@0	110	void set_alt_sig_stack(address val) { _alt_sig_stack = val; }
aoqi@0	111	address alt_sig_stack(void) { return _alt_sig_stack; }
aoqi@0	112
aoqi@0	113	private:
aoqi@0	114	Monitor* _startThread_lock; // sync parent and child in thread creation
aoqi@0	115
aoqi@0	116	public:
aoqi@0	117
aoqi@0	118	Monitor* startThread_lock() const {
aoqi@0	119	return _startThread_lock;
aoqi@0	120	}
aoqi@0	121
aoqi@0	122	// ***************************************************************
aoqi@0	123	// Platform dependent initialization and cleanup
aoqi@0	124	// ***************************************************************
aoqi@0	125
aoqi@0	126	private:
aoqi@0	127
aoqi@0	128	void pd_initialize();
aoqi@0	129	void pd_destroy();
aoqi@0	130
aoqi@0	131	// Reconciliation History
aoqi@0	132	// osThread_solaris.hpp 1.24 99/08/27 13:11:54
aoqi@0	133	// End
aoqi@0	134
aoqi@0	135	#endif // OS_LINUX_VM_OSTHREAD_LINUX_HPP