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src/share/vm/runtime/osThread.hpp@63147986a428 (annotated)

src/share/vm/runtime/osThread.hpp

Wed, 18 Sep 2013 07:02:10 -0700

author

dcubed

date

Wed, 18 Sep 2013 07:02:10 -0700

changeset 5743

63147986a428

parent 3900

d2a62e0f25eb

child 6461

bdd155477289

permissions

-rw-r--r--

8019835: Strings interned in different threads equal but does not ==
Summary: Add -XX:+VerifyStringTableAtExit option and code to verify StringTable invariants.
Reviewed-by: rdurbin, sspitsyn, coleenp

duke@435	1	/*
rbackman@3709	2	* Copyright (c) 1997, 2012, 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 SHARE_VM_RUNTIME_OSTHREAD_HPP
stefank@2314	26	#define SHARE_VM_RUNTIME_OSTHREAD_HPP
stefank@2314	27
stefank@2314	28	#include "runtime/frame.hpp"
stefank@2314	29	#include "runtime/handles.hpp"
stefank@2314	30	#include "runtime/javaFrameAnchor.hpp"
stefank@2314	31	#include "runtime/objectMonitor.hpp"
stefank@2314	32	#include "utilities/top.hpp"
stefank@2314	33
duke@435	34	// The OSThread class holds OS-specific thread information. It is equivalent
duke@435	35	// to the sys_thread_t structure of the classic JVM implementation.
duke@435	36
duke@435	37	// The thread states represented by the ThreadState values are platform-specific
duke@435	38	// and are likely to be only approximate, because most OSes don't give you access
duke@435	39	// to precise thread state information.
duke@435	40
duke@435	41	// Note: the ThreadState is legacy code and is not correctly implemented.
duke@435	42	// Uses of ThreadState need to be replaced by the state in the JavaThread.
duke@435	43
duke@435	44	enum ThreadState {
duke@435	45	ALLOCATED, // Memory has been allocated but not initialized
duke@435	46	INITIALIZED, // The thread has been initialized but yet started
duke@435	47	RUNNABLE, // Has been started and is runnable, but not necessarily running
duke@435	48	MONITOR_WAIT, // Waiting on a contended monitor lock
duke@435	49	CONDVAR_WAIT, // Waiting on a condition variable
duke@435	50	OBJECT_WAIT, // Waiting on an Object.wait() call
duke@435	51	BREAKPOINTED, // Suspended at breakpoint
duke@435	52	SLEEPING, // Thread.sleep()
duke@435	53	ZOMBIE // All done, but not reclaimed yet
duke@435	54	};
duke@435	55
duke@435	56	// I'd make OSThread a ValueObj embedded in Thread to avoid an indirection, but
duke@435	57	// the assembler test in java.cpp expects that it can install the OSThread of
duke@435	58	// the main thread into its own Thread at will.
duke@435	59
duke@435	60
zgu@3900	61	class OSThread: public CHeapObj<mtThread> {
duke@435	62	friend class VMStructs;
duke@435	63	private:
duke@435	64	OSThreadStartFunc _start_proc; // Thread start routine
duke@435	65	void* _start_parm; // Thread start routine parameter
duke@435	66	volatile ThreadState _state; // Thread state *hint*
dholmes@2668	67	volatile jint _interrupted; // Thread.isInterrupted state
duke@435	68
duke@435	69	// Note: _interrupted must be jint, so that Java intrinsics can access it.
duke@435	70	// The value stored there must be either 0 or 1. It must be possible
duke@435	71	// for Java to emulate Thread.currentThread().isInterrupted() by performing
duke@435	72	// the double indirection Thread::current()->_osthread->_interrupted.
duke@435	73
duke@435	74	// Methods
duke@435	75	public:
duke@435	76	void set_state(ThreadState state) { _state = state; }
duke@435	77	ThreadState get_state() { return _state; }
duke@435	78
duke@435	79	OSThread(OSThreadStartFunc start_proc, void* start_parm);
duke@435	80	~OSThread();
duke@435	81
duke@435	82	// Accessors
duke@435	83	OSThreadStartFunc start_proc() const { return _start_proc; }
duke@435	84	void set_start_proc(OSThreadStartFunc start_proc) { _start_proc = start_proc; }
duke@435	85	void* start_parm() const { return _start_parm; }
duke@435	86	void set_start_parm(void* start_parm) { _start_parm = start_parm; }
duke@435	87
dholmes@2668	88	volatile bool interrupted() const { return _interrupted != 0; }
duke@435	89	void set_interrupted(bool z) { _interrupted = z ? 1 : 0; }
duke@435	90
duke@435	91	// Printing
duke@435	92	void print_on(outputStream* st) const;
duke@435	93	void print() const { print_on(tty); }
duke@435	94
duke@435	95	// For java intrinsics:
duke@435	96	static ByteSize interrupted_offset() { return byte_offset_of(OSThread, _interrupted); }
duke@435	97
duke@435	98	// Platform dependent stuff
stefank@2314	99	#ifdef TARGET_OS_FAMILY_linux
stefank@2314	100	# include "osThread_linux.hpp"
stefank@2314	101	#endif
stefank@2314	102	#ifdef TARGET_OS_FAMILY_solaris
stefank@2314	103	# include "osThread_solaris.hpp"
stefank@2314	104	#endif
stefank@2314	105	#ifdef TARGET_OS_FAMILY_windows
stefank@2314	106	# include "osThread_windows.hpp"
stefank@2314	107	#endif
never@3156	108	#ifdef TARGET_OS_FAMILY_bsd
never@3156	109	# include "osThread_bsd.hpp"
never@3156	110	#endif
stefank@2314	111
rbackman@3796	112	public:
rbackman@3796	113	static ByteSize thread_id_offset() { return byte_offset_of(OSThread, _thread_id); }
rbackman@3796	114	static size_t thread_id_size() { return sizeof(thread_id_t); }
rbackman@3796	115
rbackman@3796	116	thread_id_t thread_id() const { return _thread_id; }
rbackman@3796	117
rbackman@3796	118	void set_thread_id(thread_id_t id) { _thread_id = id; }
rbackman@3796	119
rbackman@3796	120	private:
rbackman@3796	121	// _thread_id is kernel thread id (similar to LWP id on Solaris). Each
rbackman@3796	122	// thread has a unique thread_id (BsdThreads or NPTL). It can be used
rbackman@3796	123	// to access /proc.
rbackman@3796	124	thread_id_t _thread_id;
duke@435	125	};
duke@435	126
duke@435	127
duke@435	128	// Utility class for use with condition variables:
duke@435	129	class OSThreadWaitState : public StackObj {
duke@435	130	OSThread* _osthread;
duke@435	131	ThreadState _old_state;
duke@435	132	public:
duke@435	133	OSThreadWaitState(OSThread* osthread, bool is_object_wait) {
duke@435	134	_osthread = osthread;
duke@435	135	_old_state = osthread->get_state();
duke@435	136	if (is_object_wait) {
duke@435	137	osthread->set_state(OBJECT_WAIT);
duke@435	138	} else {
duke@435	139	osthread->set_state(CONDVAR_WAIT);
duke@435	140	}
duke@435	141	}
duke@435	142	~OSThreadWaitState() {
duke@435	143	_osthread->set_state(_old_state);
duke@435	144	}
duke@435	145	};
duke@435	146
duke@435	147
duke@435	148	// Utility class for use with contended monitors:
duke@435	149	class OSThreadContendState : public StackObj {
duke@435	150	OSThread* _osthread;
duke@435	151	ThreadState _old_state;
duke@435	152	public:
duke@435	153	OSThreadContendState(OSThread* osthread) {
duke@435	154	_osthread = osthread;
duke@435	155	_old_state = osthread->get_state();
duke@435	156	osthread->set_state(MONITOR_WAIT);
duke@435	157	}
duke@435	158	~OSThreadContendState() {
duke@435	159	_osthread->set_state(_old_state);
duke@435	160	}
duke@435	161	};
stefank@2314	162
stefank@2314	163	#endif // SHARE_VM_RUNTIME_OSTHREAD_HPP