server.cpp@ 16684

Last change on this file since 16684 was 16382, checked in by vboxsync, 16 years ago
ipcdUnix.cpp, xpcom/server.cpp: Fixed wrong loop. Changed my mind about trial error approach.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 38.2 KB

Line
1	/* $Id: server.cpp 16382 2009-01-29 17:16:22Z vboxsync $ */
2	/** @file
3	* XPCOM server process (VBoxSVC) start point.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 Sun Microsystems, Inc.
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18	* Clara, CA 95054 USA or visit http://www.sun.com if you need
19	* additional information or have any questions.
20	*/
21
22	/* Make sure all the stdint.h macros are included - must come first! */
23	#ifndef __STDC_LIMIT_MACROS
24	# define __STDC_LIMIT_MACROS
25	#endif
26	#ifndef __STDC_CONSTANT_MACROS
27	# define __STDC_CONSTANT_MACROS
28	#endif
29
30	#include <ipcIService.h>
31	#include <ipcCID.h>
32
33	#include <nsIComponentRegistrar.h>
34
35	#if defined(XPCOM_GLUE)
36	#include <nsXPCOMGlue.h>
37	#endif
38
39	#include <nsEventQueueUtils.h>
40	#include <nsGenericFactory.h>
41
42	#include "xpcom/server.h"
43
44	#include "Logging.h"
45
46	#include <VBox/param.h>
47	#include <VBox/version.h>
48
49	#include <iprt/initterm.h>
50	#include <iprt/path.h>
51	#include <iprt/critsect.h>
52	#include <iprt/timer.h>
53
54	#include <stdio.h>
55
56	// for the signal handler
57	#include <signal.h>
58	#include <stdlib.h>
59	#include <unistd.h>
60	#include <errno.h>
61	#include <getopt.h>
62
63	#ifndef RT_OS_OS2
64	# include <sys/resource.h>
65	#endif
66
67	// for the backtrace signal handler
68	#if defined(DEBUG) && defined(RT_OS_LINUX)
69	# define USE_BACKTRACE
70	#endif
71	#if defined(USE_BACKTRACE)
72	# include <execinfo.h>
73	// get REG_EIP/RIP from ucontext.h
74	# ifndef __USE_GNU
75	# define __USE_GNU
76	# endif
77	# include <ucontext.h>
78	# ifdef RT_ARCH_AMD64
79	# define REG_PC REG_RIP
80	# else
81	# define REG_PC REG_EIP
82	# endif
83	#endif
84
85	/////////////////////////////////////////////////////////////////////////////
86	// VirtualBox component instantiation
87	/////////////////////////////////////////////////////////////////////////////
88
89	#include <nsIGenericFactory.h>
90
91	#include <VirtualBox_XPCOM.h>
92	#include <VirtualBoxImpl.h>
93	#include <MachineImpl.h>
94	#include <ApplianceImpl.h>
95	#include <SnapshotImpl.h>
96	#include <MediumImpl.h>
97	#include <HardDisk2Impl.h>
98	#include <HardDiskFormatImpl.h>
99	#include <ProgressImpl.h>
100	#include <DVDDriveImpl.h>
101	#include <FloppyDriveImpl.h>
102	#include <VRDPServerImpl.h>
103	#include <SharedFolderImpl.h>
104	#include <HostImpl.h>
105	#include <HostDVDDriveImpl.h>
106	#include <HostFloppyDriveImpl.h>
107	#include <HostNetworkInterfaceImpl.h>
108	#include <GuestOSTypeImpl.h>
109	#include <NetworkAdapterImpl.h>
110	#include <SerialPortImpl.h>
111	#include <ParallelPortImpl.h>
112	#include <USBControllerImpl.h>
113	#ifdef VBOX_WITH_USB
114	# include <HostUSBDeviceImpl.h>
115	# include <USBDeviceImpl.h>
116	#endif
117	#include <SATAControllerImpl.h>
118	#include <AudioAdapterImpl.h>
119	#include <SystemPropertiesImpl.h>
120	#include <Collection.h>
121
122	/* implement nsISupports parts of our objects with support for nsIClassInfo */
123
124	NS_DECL_CLASSINFO(VirtualBox)
125	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(VirtualBox, IVirtualBox)
126
127	NS_DECL_CLASSINFO(Machine)
128	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(Machine, IMachine)
129
130	NS_DECL_CLASSINFO(Appliance)
131	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(Appliance, IAppliance)
132
133	NS_DECL_CLASSINFO(VirtualSystemDescription)
134	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(VirtualSystemDescription, IVirtualSystemDescription)
135
136	NS_DECL_CLASSINFO(SessionMachine)
137	NS_IMPL_THREADSAFE_ISUPPORTS2_CI(SessionMachine, IMachine, IInternalMachineControl)
138
139	NS_DECL_CLASSINFO(SnapshotMachine)
140	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(SnapshotMachine, IMachine)
141
142	NS_DECL_CLASSINFO(Snapshot)
143	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(Snapshot, ISnapshot)
144
145	NS_DECL_CLASSINFO(DVDImage2)
146	NS_IMPL_THREADSAFE_ISUPPORTS2_AMBIGUOUS_CI(DVDImage2,
147	IMedium, ImageMediumBase,
148	IDVDImage2, DVDImage2)
149	NS_DECL_CLASSINFO(FloppyImage2)
150	NS_IMPL_THREADSAFE_ISUPPORTS2_AMBIGUOUS_CI(FloppyImage2,
151	IMedium, ImageMediumBase,
152	IFloppyImage2, FloppyImage2)
153
154	NS_DECL_CLASSINFO(HardDisk2)
155	NS_IMPL_THREADSAFE_ISUPPORTS2_AMBIGUOUS_CI(HardDisk2,
156	IMedium, MediumBase,
157	IHardDisk2, HardDisk2)
158
159	NS_DECL_CLASSINFO(HardDiskFormat)
160	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(HardDiskFormat, IHardDiskFormat)
161
162	NS_DECL_CLASSINFO(HardDisk2Attachment)
163	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(HardDisk2Attachment, IHardDisk2Attachment)
164
165	NS_DECL_CLASSINFO(Progress)
166	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(Progress, IProgress)
167
168	NS_DECL_CLASSINFO(CombinedProgress)
169	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(CombinedProgress, IProgress)
170
171	NS_DECL_CLASSINFO(DVDDrive)
172	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(DVDDrive, IDVDDrive)
173
174	NS_DECL_CLASSINFO(FloppyDrive)
175	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(FloppyDrive, IFloppyDrive)
176
177	NS_DECL_CLASSINFO(SharedFolder)
178	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(SharedFolder, ISharedFolder)
179
180	#ifdef VBOX_WITH_VRDP
181	NS_DECL_CLASSINFO(VRDPServer)
182	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(VRDPServer, IVRDPServer)
183	#endif
184
185	NS_DECL_CLASSINFO(Host)
186	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(Host, IHost)
187
188	NS_DECL_CLASSINFO(HostDVDDrive)
189	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(HostDVDDrive, IHostDVDDrive)
190
191	NS_DECL_CLASSINFO(HostFloppyDrive)
192	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(HostFloppyDrive, IHostFloppyDrive)
193
194	NS_DECL_CLASSINFO(HostNetworkInterface)
195	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(HostNetworkInterface, IHostNetworkInterface)
196
197	NS_DECL_CLASSINFO(GuestOSType)
198	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(GuestOSType, IGuestOSType)
199
200	NS_DECL_CLASSINFO(NetworkAdapter)
201	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(NetworkAdapter, INetworkAdapter)
202
203	NS_DECL_CLASSINFO(SerialPort)
204	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(SerialPort, ISerialPort)
205
206	NS_DECL_CLASSINFO(ParallelPort)
207	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(ParallelPort, IParallelPort)
208
209	NS_DECL_CLASSINFO(USBController)
210	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(USBController, IUSBController)
211
212	NS_DECL_CLASSINFO(SATAController)
213	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(SATAController, ISATAController)
214
215	#ifdef VBOX_WITH_USB
216	NS_DECL_CLASSINFO(USBDeviceFilter)
217	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(USBDeviceFilter, IUSBDeviceFilter)
218
219	NS_DECL_CLASSINFO(HostUSBDevice)
220	NS_IMPL_THREADSAFE_ISUPPORTS2_CI(HostUSBDevice, IUSBDevice, IHostUSBDevice)
221
222	NS_DECL_CLASSINFO(HostUSBDeviceFilter)
223	NS_IMPL_THREADSAFE_ISUPPORTS2_CI(HostUSBDeviceFilter, IUSBDeviceFilter, IHostUSBDeviceFilter)
224	#endif
225
226	NS_DECL_CLASSINFO(AudioAdapter)
227	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(AudioAdapter, IAudioAdapter)
228
229	NS_DECL_CLASSINFO(SystemProperties)
230	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(SystemProperties, ISystemProperties)
231
232	#ifdef VBOX_WITH_RESOURCE_USAGE_API
233	NS_DECL_CLASSINFO(PerformanceCollector)
234	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(PerformanceCollector, IPerformanceCollector)
235	NS_DECL_CLASSINFO(PerformanceMetric)
236	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(PerformanceMetric, IPerformanceMetric)
237	#endif /* VBOX_WITH_RESOURCE_USAGE_API */
238
239	NS_DECL_CLASSINFO(BIOSSettings)
240	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(BIOSSettings, IBIOSSettings)
241
242	/* collections and enumerators */
243
244	COM_IMPL_READONLY_ENUM_AND_COLLECTION(Snapshot)
245	COM_IMPL_READONLY_ENUM_AND_COLLECTION(GuestOSType)
246	COM_IMPL_READONLY_ENUM_AND_COLLECTION(HostDVDDrive)
247	COM_IMPL_READONLY_ENUM_AND_COLLECTION(HostFloppyDrive)
248	COM_IMPL_READONLY_ENUM_AND_COLLECTION(SharedFolder)
249	#ifdef VBOX_WITH_USB
250	COM_IMPL_READONLY_ENUM_AND_COLLECTION(HostUSBDevice)
251	COM_IMPL_READONLY_ENUM_AND_COLLECTION(HostUSBDeviceFilter)
252	COM_IMPL_READONLY_ENUM_AND_COLLECTION(USBDeviceFilter)
253	#endif
254
255	COM_IMPL_READONLY_ENUM_AND_COLLECTION_AS(Progress, IProgress)
256	#ifdef VBOX_WITH_USB
257	COM_IMPL_READONLY_ENUM_AND_COLLECTION_AS(IfaceUSBDevice, IUSBDevice)
258	#endif
259
260	////////////////////////////////////////////////////////////////////////////////
261
262	enum
263	{
264	/* Delay before shutting down the VirtualBox server after the last
265	* VirtualBox instance is released, in ms */
266	VBoxSVC_ShutdownDelay = 5000,
267	};
268
269	static bool gAutoShutdown = false;
270
271	static nsIEventQueue* gEventQ = nsnull;
272	static PRBool volatile gKeepRunning = PR_TRUE;
273
274	/////////////////////////////////////////////////////////////////////////////
275
276	/**
277	* Simple but smart PLEvent wrapper.
278	*
279	* @note Instances must be always created with <tt>operator new</tt>!
280	*/
281	class MyEvent
282	{
283	public:
284
285	MyEvent()
286	{
287	mEv.that = NULL;
288	};
289
290	/**
291	* Posts this event to the given message queue. This method may only be
292	* called once. @note On success, the event will be deleted automatically
293	* after it is delivered and handled. On failure, the event will delete
294	* itself before this method returns! The caller must not delete it in
295	* either case.
296	*/
297	nsresult postTo (nsIEventQueue *aEventQ)
298	{
299	AssertReturn (mEv.that == NULL, NS_ERROR_FAILURE);
300	AssertReturn (aEventQ, NS_ERROR_FAILURE);
301	nsresult rv = aEventQ->InitEvent (&mEv.e, NULL,
302	eventHandler, eventDestructor);
303	if (NS_SUCCEEDED (rv))
304	{
305	mEv.that = this;
306	rv = aEventQ->PostEvent (&mEv.e);
307	if (NS_SUCCEEDED (rv))
308	return rv;
309	}
310	delete this;
311	return rv;
312	}
313
314	virtual void *handler() = 0;
315
316	private:
317
318	struct Ev
319	{
320	PLEvent e;
321	MyEvent *that;
322	} mEv;
323
324	static void PR_CALLBACK eventHandler (PLEvent self)
325	{
326	return reinterpret_cast <Ev *> (self)->that->handler();
327	}
328
329	static void PR_CALLBACK eventDestructor (PLEvent *self)
330	{
331	delete reinterpret_cast <Ev *> (self)->that;
332	}
333	};
334
335	////////////////////////////////////////////////////////////////////////////////
336
337	/**
338	* VirtualBox class factory that destroys the created instance right after
339	* the last reference to it is released by the client, and recreates it again
340	* when necessary (so VirtualBox acts like a singleton object).
341	*/
342	class VirtualBoxClassFactory : public VirtualBox
343	{
344	public:
345
346	virtual ~VirtualBoxClassFactory()
347	{
348	LogFlowFunc (("Deleting VirtualBox...\n"));
349
350	FinalRelease();
351	sInstance = NULL;
352
353	LogFlowFunc (("VirtualBox object deleted.\n"));
354	printf ("Informational: VirtualBox object deleted.\n");
355	}
356
357	NS_IMETHOD_(nsrefcnt) Release()
358	{
359	/* we overload Release() to guarantee the VirtualBox destructor is
360	* always called on the main thread */
361
362	nsrefcnt count = VirtualBox::Release();
363
364	if (count == 1)
365	{
366	/* the last reference held by clients is being released
367	* (see GetInstance()) */
368
369	PRBool onMainThread = PR_TRUE;
370	if (gEventQ)
371	gEventQ->IsOnCurrentThread (&onMainThread);
372
373	PRBool timerStarted = PR_FALSE;
374
375	/* sTimer is null if this call originates from FactoryDestructor()*/
376	if (sTimer != NULL)
377	{
378	LogFlowFunc (("Last VirtualBox instance was released.\n"));
379	LogFlowFunc (("Scheduling server shutdown in %d ms...\n",
380	VBoxSVC_ShutdownDelay));
381
382	/* make sure the previous timer (if any) is stopped;
383	* otherwise RTTimerStart() will definitely fail. */
384	RTTimerLRStop (sTimer);
385
386	int vrc = RTTimerLRStart (sTimer, uint64_t (VBoxSVC_ShutdownDelay) * 1000000);
387	AssertRC (vrc);
388	timerStarted = SUCCEEDED (vrc);
389	}
390	else
391	{
392	LogFlowFunc (("Last VirtualBox instance was released "
393	"on XPCOM shutdown.\n"));
394	Assert (onMainThread);
395	}
396
397	if (!timerStarted)
398	{
399	if (!onMainThread)
400	{
401	/* Failed to start the timer, post the shutdown event
402	* manually if not on the main thread alreay. */
403	ShutdownTimer (NULL, NULL, 0);
404	}
405	else
406	{
407	/* Here we come if:
408	*
409	* a) gEventQ is 0 which means either FactoryDestructor() is called
410	* or the IPC/DCONNECT shutdown sequence is initiated by the
411	* XPCOM shutdown routine (NS_ShutdownXPCOM()), which always
412	* happens on the main thread.
413	*
414	* b) gEventQ has reported we're on the main thread. This means
415	* that DestructEventHandler() has been called, but another
416	* client was faster and requested VirtualBox again.
417	*
418	* In either case, there is nothing to do.
419	*
420	* Note: case b) is actually no more valid since we don't
421	* call Release() from DestructEventHandler() in this case
422	* any more. Thus, we assert below.
423	*/
424
425	Assert (gEventQ == NULL);
426	}
427	}
428	}
429
430	return count;
431	}
432
433	class MaybeQuitEvent : public MyEvent
434	{
435	/* called on the main thread */
436	void *handler()
437	{
438	LogFlowFunc (("\n"));
439
440	Assert (RTCritSectIsInitialized (&sLock));
441
442	/* stop accepting GetInstance() requests on other threads during
443	* possible destruction */
444	RTCritSectEnter (&sLock);
445
446	nsrefcnt count = 0;
447
448	/* sInstance is NULL here if it was deleted immediately after
449	* creation due to initialization error. See GetInstance(). */
450	if (sInstance != NULL)
451	{
452	/* Release the guard reference added in GetInstance() */
453	count = sInstance->Release();
454	}
455
456	if (count == 0)
457	{
458	if (gAutoShutdown)
459	{
460	Assert (sInstance == NULL);
461	LogFlowFunc (("Terminating the server process...\n"));
462	/* make it leave the event loop */
463	gKeepRunning = PR_FALSE;
464	}
465	}
466	else
467	{
468	/* This condition is quite rare: a new client happened to
469	* connect after this event has been posted to the main queue
470	* but before it started to process it. */
471	LogFlowFunc (("Destruction is canceled (refcnt=%d).\n", count));
472	}
473
474	RTCritSectLeave (&sLock);
475
476	return NULL;
477	}
478	};
479
480	static void ShutdownTimer (RTTIMERLR hTimerLR, void pvUser, uint64_t /iTick*/)
481	{
482	NOREF (hTimerLR);
483	NOREF (pvUser);
484
485	/* A "too late" event is theoretically possible if somebody
486	* manually ended the server after a destruction has been scheduled
487	* and this method was so lucky that it got a chance to run before
488	* the timer was killed. */
489	AssertReturnVoid (gEventQ);
490
491	/* post a quit event to the main queue */
492	MaybeQuitEvent *ev = new MaybeQuitEvent();
493	nsresult rv = ev->postTo (gEventQ);
494	NOREF (rv);
495
496	/* A failure above means we've been already stopped (for example
497	* by Ctrl-C). FactoryDestructor() (NS_ShutdownXPCOM())
498	* will do the job. Nothing to do. */
499	}
500
501	static NS_IMETHODIMP FactoryConstructor()
502	{
503	LogFlowFunc (("\n"));
504
505	/* create a critsect to protect object construction */
506	if (RT_FAILURE (RTCritSectInit (&sLock)))
507	return NS_ERROR_OUT_OF_MEMORY;
508
509	int vrc = RTTimerLRCreateEx (&sTimer, 0, 0, ShutdownTimer, NULL);
510	if (RT_FAILURE (vrc))
511	{
512	LogFlowFunc (("Failed to create a timer! (vrc=%Rrc)\n", vrc));
513	return NS_ERROR_FAILURE;
514	}
515
516	return NS_OK;
517	}
518
519	static NS_IMETHODIMP FactoryDestructor()
520	{
521	LogFlowFunc (("\n"));
522
523	RTTimerLRDestroy (sTimer);
524	sTimer = NULL;
525
526	RTCritSectDelete (&sLock);
527
528	if (sInstance != NULL)
529	{
530	/* Either posting a destruction event falied for some reason (most
531	* likely, the quit event has been received before the last release),
532	* or the client has terminated abnormally w/o releasing its
533	* VirtualBox instance (so NS_ShutdownXPCOM() is doing a cleanup).
534	* Release the guard reference we added in GetInstance(). */
535	sInstance->Release();
536	}
537
538	return NS_OK;
539	}
540
541	static nsresult GetInstance (VirtualBox **inst)
542	{
543	LogFlowFunc (("Getting VirtualBox object...\n"));
544
545	RTCritSectEnter (&sLock);
546
547	if (!gKeepRunning)
548	{
549	LogFlowFunc (("Process termination requested first. Refusing.\n"));
550
551	RTCritSectLeave (&sLock);
552
553	/* this rv is what CreateInstance() on the client side returns
554	* when the server process stops accepting events. Do the same
555	* here. The client wrapper should attempt to start a new process in
556	* response to a failure from us. */
557	return NS_ERROR_ABORT;
558	}
559
560	nsresult rv = NS_OK;
561
562	if (sInstance == NULL)
563	{
564	LogFlowFunc (("Creating new VirtualBox object...\n"));
565	sInstance = new VirtualBoxClassFactory();
566	if (sInstance != NULL)
567	{
568	/* make an extra AddRef to take the full control
569	* on the VirtualBox destruction (see FinalRelease()) */
570	sInstance->AddRef();
571
572	sInstance->AddRef(); /* protect FinalConstruct() */
573	rv = sInstance->FinalConstruct();
574	printf ("Informational: VirtualBox object created (rc=%08X).\n", rv);
575	if (NS_FAILED (rv))
576	{
577	/* On failure diring VirtualBox initialization, delete it
578	* immediately on the current thread by releasing all
579	* references in order to properly schedule the server
580	* shutdown. Since the object is fully deleted here, there
581	* is a chance to fix the error and request a new
582	* instantiation before the server terminates. However,
583	* the main reason to maintain the shoutdown delay on
584	* failure is to let the front-end completely fetch error
585	* info from a server-side IVirtualBoxErrorInfo object. */
586	sInstance->Release();
587	sInstance->Release();
588	Assert (sInstance == NULL);
589	}
590	else
591	{
592	/* On success, make sure the previous timer is stopped to
593	* cancel a scheduled server termination (if any). */
594	RTTimerLRStop (sTimer);
595	}
596	}
597	else
598	{
599	rv = NS_ERROR_OUT_OF_MEMORY;
600	}
601	}
602	else
603	{
604	LogFlowFunc (("Using existing VirtualBox object...\n"));
605	nsrefcnt count = sInstance->AddRef();
606	Assert (count > 1);
607
608	if (count == 2)
609	{
610	LogFlowFunc (("Another client has requested a reference to VirtualBox, "
611	"canceling detruction...\n"));
612
613	/* make sure the previous timer is stopped */
614	RTTimerLRStop (sTimer);
615	}
616	}
617
618	*inst = sInstance;
619
620	RTCritSectLeave (&sLock);
621
622	return rv;
623	}
624
625	private:
626
627	/* Don't be confused that sInstance is of the *ClassFactory type. This is
628	* actually a singleton instance (*ClassFactory inherits the singleton
629	* class; we combined them just for "simplicity" and used "static" for
630	* factory methods. *ClassFactory here is necessary for a couple of extra
631	* methods. */
632
633	static VirtualBoxClassFactory *sInstance;
634	static RTCRITSECT sLock;
635
636	static RTTIMERLR sTimer;
637	};
638
639	VirtualBoxClassFactory *VirtualBoxClassFactory::sInstance = NULL;
640	RTCRITSECT VirtualBoxClassFactory::sLock = {0};
641
642	RTTIMERLR VirtualBoxClassFactory::sTimer = NIL_RTTIMERLR;
643
644	NS_GENERIC_FACTORY_SINGLETON_CONSTRUCTOR_WITH_RC
645	(VirtualBox, VirtualBoxClassFactory::GetInstance)
646
647	////////////////////////////////////////////////////////////////////////////////
648
649	typedef NSFactoryDestructorProcPtr NSFactoryConsructorProcPtr;
650
651	/**
652	* Enhanced module component information structure.
653	*
654	* nsModuleComponentInfo lacks the factory construction callback, here we add
655	* it. This callback is called by NS_NewGenericFactoryEx() after a
656	* nsGenericFactory instance is successfully created.
657	*/
658	struct nsModuleComponentInfoEx : nsModuleComponentInfo
659	{
660	nsModuleComponentInfoEx () {}
661	nsModuleComponentInfoEx (int) {}
662
663	nsModuleComponentInfoEx (
664	const char* aDescription,
665	const nsCID& aCID,
666	const char* aContractID,
667	NSConstructorProcPtr aConstructor,
668	NSRegisterSelfProcPtr aRegisterSelfProc,
669	NSUnregisterSelfProcPtr aUnregisterSelfProc,
670	NSFactoryDestructorProcPtr aFactoryDestructor,
671	NSGetInterfacesProcPtr aGetInterfacesProc,
672	NSGetLanguageHelperProcPtr aGetLanguageHelperProc,
673	nsIClassInfo ** aClassInfoGlobal,
674	PRUint32 aFlags,
675	NSFactoryConsructorProcPtr aFactoryConstructor)
676	{
677	mDescription = aDescription;
678	mCID = aCID;
679	mContractID = aContractID;
680	mConstructor = aConstructor;
681	mRegisterSelfProc = aRegisterSelfProc;
682	mUnregisterSelfProc = aUnregisterSelfProc;
683	mFactoryDestructor = aFactoryDestructor;
684	mGetInterfacesProc = aGetInterfacesProc;
685	mGetLanguageHelperProc = aGetLanguageHelperProc;
686	mClassInfoGlobal = aClassInfoGlobal;
687	mFlags = aFlags;
688	mFactoryConstructor = aFactoryConstructor;
689	}
690
691	/** (optional) Factory Construction Callback */
692	NSFactoryConsructorProcPtr mFactoryConstructor;
693	};
694
695	////////////////////////////////////////////////////////////////////////////////
696
697	static const nsModuleComponentInfoEx components[] =
698	{
699	nsModuleComponentInfoEx (
700	"VirtualBox component",
701	(nsCID) NS_VIRTUALBOX_CID,
702	NS_VIRTUALBOX_CONTRACTID,
703	VirtualBoxConstructor, // constructor funcion
704	NULL, // registration function
705	NULL, // deregistration function
706	VirtualBoxClassFactory::FactoryDestructor, // factory destructor function
707	NS_CI_INTERFACE_GETTER_NAME(VirtualBox),
708	NULL, // language helper
709	&NS_CLASSINFO_NAME(VirtualBox),
710	0, // flags
711	VirtualBoxClassFactory::FactoryConstructor // factory constructor function
712	)
713	};
714
715	/////////////////////////////////////////////////////////////////////////////
716
717	/**
718	* Extends NS_NewGenericFactory() by immediately calling
719	* nsModuleComponentInfoEx::mFactoryConstructor before returning to the
720	* caller.
721	*/
722	nsresult
723	NS_NewGenericFactoryEx (nsIGenericFactory **result,
724	const nsModuleComponentInfoEx *info)
725	{
726	AssertReturn (result, NS_ERROR_INVALID_POINTER);
727
728	nsresult rv = NS_NewGenericFactory (result, info);
729	if (NS_SUCCEEDED (rv) && info && info->mFactoryConstructor)
730	{
731	rv = info->mFactoryConstructor();
732	if (NS_FAILED (rv))
733	NS_RELEASE (*result);
734	}
735
736	return rv;
737	}
738
739	/////////////////////////////////////////////////////////////////////////////
740
741	/**
742	* Hhelper function to register self components upon start-up
743	* of the out-of-proc server.
744	*/
745	static nsresult
746	RegisterSelfComponents (nsIComponentRegistrar *registrar,
747	const nsModuleComponentInfoEx *components,
748	PRUint32 count)
749	{
750	nsresult rc = NS_OK;
751	const nsModuleComponentInfoEx *info = components;
752	for (PRUint32 i = 0; i < count && NS_SUCCEEDED (rc); i++, info++)
753	{
754	/* skip components w/o a constructor */
755	if (!info->mConstructor) continue;
756	/* create a new generic factory for a component and register it */
757	nsIGenericFactory *factory;
758	rc = NS_NewGenericFactoryEx (&factory, info);
759	if (NS_SUCCEEDED (rc))
760	{
761	rc = registrar->RegisterFactory (info->mCID,
762	info->mDescription,
763	info->mContractID,
764	factory);
765	factory->Release();
766	}
767	}
768	return rc;
769	}
770
771	/////////////////////////////////////////////////////////////////////////////
772
773	static ipcIService *gIpcServ = nsnull;
774	static char *pszPidFile = NULL;
775
776	class ForceQuitEvent : public MyEvent
777	{
778	void *handler()
779	{
780	LogFlowFunc (("\n"));
781
782	gKeepRunning = PR_FALSE;
783
784	if (pszPidFile)
785	RTFileDelete(pszPidFile);
786
787	return NULL;
788	}
789	};
790
791	static void signal_handler (int sig)
792	{
793	if (gEventQ && gKeepRunning)
794	{
795	/* post a quit event to the queue */
796	ForceQuitEvent *ev = new ForceQuitEvent();
797	ev->postTo (gEventQ);
798	}
799	}
800
801	#if defined(USE_BACKTRACE)
802	/**
803	* the signal handler that prints out a backtrace of the call stack.
804	* the code is taken from http://www.linuxjournal.com/article/6391.
805	*/
806	static void bt_sighandler (int sig, siginfo_t info, void secret)
807	{
808
809	void *trace[16];
810	char messages = (char )NULL;
811	int i, trace_size = 0;
812	ucontext_t uc = (ucontext_t )secret;
813
814	// Do something useful with siginfo_t
815	if (sig == SIGSEGV)
816	Log (("Got signal %d, faulty address is %p, from %p\n",
817	sig, info->si_addr, uc->uc_mcontext.gregs[REG_PC]));
818	else
819	Log (("Got signal %d\n", sig));
820
821	trace_size = backtrace (trace, 16);
822	// overwrite sigaction with caller's address
823	trace[1] = (void *) uc->uc_mcontext.gregs [REG_PC];
824
825	messages = backtrace_symbols (trace, trace_size);
826	// skip first stack frame (points here)
827	Log (("[bt] Execution path:\n"));
828	for (i = 1; i < trace_size; ++i)
829	Log (("[bt] %s\n", messages[i]));
830
831	exit (0);
832	}
833	#endif
834
835	int main (int argc, char **argv)
836	{
837	const struct option options[] =
838	{
839	{ "automate", no_argument, NULL, 'a' },
840	#ifdef RT_OS_DARWIN
841	{ "auto-shutdown", no_argument, NULL, 'A' },
842	#endif
843	{ "daemonize", no_argument, NULL, 'd' },
844	{ "pidfile", required_argument, NULL, 'p' },
845	#ifdef RT_OS_DARWIN
846	{ "pipe", required_argument, NULL, 'P' },
847	#endif
848	{ NULL, 0, NULL, 0 }
849	};
850	int c;
851
852	bool fDaemonize = false;
853	#ifndef RT_OS_OS2
854	static int daemon_pipe_fds[2] = {-1, -1};
855	#endif
856
857	for (;;)
858	{
859	c = getopt_long(argc, argv, "", options, NULL);
860	if (c == -1)
861	break;
862	switch (c)
863	{
864	case 'a':
865	{
866	/* --automate mode means we are started by XPCOM on
867	* demand. Daemonize ourselves and activate
868	* auto-shutdown. */
869	gAutoShutdown = true;
870	fDaemonize = true;
871	break;
872	}
873
874	#ifdef RT_OS_DARWIN
875	/* Used together with '-P', see below. Internal use only. */
876	case 'A':
877	{
878	gAutoShutdown = true;
879	break;
880	}
881	#endif
882
883	case 'd':
884	{
885	fDaemonize = true;
886	break;
887	}
888
889	case 'p':
890	{
891	pszPidFile = optarg;
892	break;
893	}
894
895	#ifdef RT_OS_DARWIN
896	/* we need to exec on darwin, this is just an internal
897	* hack for passing the pipe fd along to the final child. */
898	case 'P':
899	{
900	daemon_pipe_fds[1] = atoi(optarg);
901	break;
902	}
903	#endif
904
905	default:
906	{
907	/* exit on invalid options */
908	return 1;
909	}
910	}
911	}
912
913	static RTFILE pidFile = NIL_RTFILE;
914
915	#ifdef RT_OS_OS2
916
917	/* nothing to do here, the process is supposed to be already
918	* started daemonized when it is necessary */
919	NOREF(fDaemonize);
920
921	#else // ifdef RT_OS_OS2
922
923	if (fDaemonize)
924	{
925	/* create a pipe for communication between child and parent */
926	if (pipe(daemon_pipe_fds) < 0)
927	{
928	printf("ERROR: pipe() failed (errno = %d)\n", errno);
929	return 1;
930	}
931
932	pid_t childpid = fork();
933	if (childpid == -1)
934	{
935	printf("ERROR: fork() failed (errno = %d)\n", errno);
936	return 1;
937	}
938
939	if (childpid != 0)
940	{
941	/* we're the parent process */
942	bool fSuccess = false;
943
944	/* close the writing end of the pipe */
945	close(daemon_pipe_fds[1]);
946
947	/* try to read a message from the pipe */
948	char msg[10] = {0}; /* initialize so it's NULL terminated */
949	if (read(daemon_pipe_fds[0], msg, sizeof(msg)) > 0)
950	{
951	if (strcmp(msg, "READY") == 0)
952	fSuccess = true;
953	else
954	printf ("ERROR: Unknown message from child "
955	"process (%s)\n", msg);
956	}
957	else
958	printf ("ERROR: 0 bytes read from child process\n");
959
960	/* close the reading end of the pipe as well and exit */
961	close(daemon_pipe_fds[0]);
962	return fSuccess ? 0 : 1;
963	}
964	/* we're the child process */
965
966	/* Create a new SID for the child process */
967	pid_t sid = setsid();
968	if (sid < 0)
969	{
970	printf("ERROR: setsid() failed (errno = %d)\n", errno);
971	return 1;
972	}
973
974	/* Need to do another for to get rid of the session leader status.
975	* Otherwise any accidentally opened tty will automatically become a
976	* controlling tty for the daemon process. */
977	childpid = fork();
978	if (childpid == -1)
979	{
980	printf("ERROR: second fork() failed (errno = %d)\n", errno);
981	return 1;
982	}
983
984	if (childpid != 0)
985	{
986	/* we're the parent process, just a dummy so terminate now */
987	exit(0);
988	}
989
990	/* Redirect standard i/o streams to /dev/null */
991	if (daemon_pipe_fds[0] > 2)
992	{
993	freopen ("/dev/null", "r", stdin);
994	freopen ("/dev/null", "w", stdout);
995	freopen ("/dev/null", "w", stderr);
996	}
997
998	/* close the reading end of the pipe */
999	close(daemon_pipe_fds[0]);
1000
1001	# ifdef RT_OS_DARWIN
1002	/*
1003	* On leopard we're no longer allowed to use some of the core API's
1004	* after forking - this will cause us to hit an int3.
1005	* So, we'll have to execv VBoxSVC once again and hand it the pipe
1006	* and all other relevant options.
1007	*/
1008	const char *apszArgs[7];
1009	unsigned i = 0;
1010	apszArgs[i++] = argv[0];
1011	apszArgs[i++] = "--pipe";
1012	char szPipeArg[32];
1013	RTStrPrintf (szPipeArg, sizeof (szPipeArg), "%d", daemon_pipe_fds[1]);
1014	apszArgs[i++] = szPipeArg;
1015	if (pszPidFile)
1016	{
1017	apszArgs[i++] = "--pidfile";
1018	apszArgs[i++] = pszPidFile;
1019	}
1020	if (gAutoShutdown)
1021	apszArgs[i++] = "--auto-shutdown";
1022	apszArgs[i++] = NULL; Assert(i <= RT_ELEMENTS(apszArgs));
1023	execv (apszArgs[0], (char * const *)apszArgs);
1024	exit (0);
1025	# endif
1026	}
1027
1028	#endif // ifdef RT_OS_OS2
1029
1030	#if defined(USE_BACKTRACE)
1031	{
1032	/* install our signal handler to backtrace the call stack */
1033	struct sigaction sa;
1034	sa.sa_sigaction = bt_sighandler;
1035	sigemptyset (&sa.sa_mask);
1036	sa.sa_flags = SA_RESTART \| SA_SIGINFO;
1037	sigaction (SIGSEGV, &sa, NULL);
1038	sigaction (SIGBUS, &sa, NULL);
1039	sigaction (SIGUSR1, &sa, NULL);
1040	}
1041	#endif
1042
1043	/*
1044	* Initialize the VBox runtime without loading
1045	* the support driver
1046	*/
1047	RTR3Init();
1048
1049	nsresult rc;
1050
1051	do
1052	{
1053	rc = com::Initialize();
1054	if (NS_FAILED (rc))
1055	{
1056	printf ("ERROR: Failed to initialize XPCOM! (rc=%08X)\n", rc);
1057	break;
1058	}
1059
1060	nsCOMPtr <nsIComponentRegistrar> registrar;
1061	rc = NS_GetComponentRegistrar (getter_AddRefs (registrar));
1062	if (NS_FAILED (rc))
1063	{
1064	printf ("ERROR: Failed to get component registrar! (rc=%08X)\n", rc);
1065	break;
1066	}
1067
1068	registrar->AutoRegister (nsnull);
1069	rc = RegisterSelfComponents (registrar, components,
1070	NS_ARRAY_LENGTH (components));
1071	if (NS_FAILED (rc))
1072	{
1073	printf ("ERROR: Failed to register server components! (rc=%08X)\n", rc);
1074	break;
1075	}
1076
1077	/* get the main thread's event queue (afaik, the dconnect service always
1078	* gets created upon XPCOM startup, so it will use the main (this)
1079	* thread's event queue to receive IPC events) */
1080	rc = NS_GetMainEventQ (&gEventQ);
1081	if (NS_FAILED (rc))
1082	{
1083	printf ("ERROR: Failed to get the main event queue! (rc=%08X)\n", rc);
1084	break;
1085	}
1086
1087	nsCOMPtr<ipcIService> ipcServ (do_GetService(IPC_SERVICE_CONTRACTID, &rc));
1088	if (NS_FAILED (rc))
1089	{
1090	printf ("ERROR: Failed to get IPC service! (rc=%08X)\n", rc);
1091	break;
1092	}
1093
1094	NS_ADDREF (gIpcServ = ipcServ);
1095
1096	LogFlowFunc (("Will use \"%s\" as server name.\n", VBOXSVC_IPC_NAME));
1097
1098	rc = gIpcServ->AddName (VBOXSVC_IPC_NAME);
1099	if (NS_FAILED (rc))
1100	{
1101	LogFlowFunc (("Failed to register the server name (rc=%08X)!\n"
1102	"Is another server already running?\n", rc));
1103
1104	printf ("ERROR: Failed to register the server name \"%s\" (rc=%08X)!\n"
1105	"Is another server already running?\n",
1106	VBOXSVC_IPC_NAME, rc);
1107	NS_RELEASE (gIpcServ);
1108	break;
1109	}
1110
1111	{
1112	/* setup signal handling to convert some signals to a quit event */
1113	struct sigaction sa;
1114	sa.sa_handler = signal_handler;
1115	sigemptyset (&sa.sa_mask);
1116	sa.sa_flags = 0;
1117	sigaction (SIGINT, &sa, NULL);
1118	sigaction (SIGQUIT, &sa, NULL);
1119	sigaction (SIGTERM, &sa, NULL);
1120	sigaction (SIGTRAP, &sa, NULL);
1121	}
1122
1123	{
1124	char szBuf[80];
1125	int iSize;
1126
1127	iSize = snprintf (szBuf, sizeof(szBuf),
1128	"Sun xVM VirtualBox XPCOM Server Version "
1129	VBOX_VERSION_STRING);
1130	for (int i=iSize; i>0; i--)
1131	putchar('*');
1132	printf ("\n%s\n", szBuf);
1133	printf ("(C) 2008-2009 Sun Microsystems, Inc.\n"
1134	"All rights reserved.\n");
1135	#ifdef DEBUG
1136	printf ("Debug version.\n");
1137	#endif
1138	#if 0
1139	/* in my opinion two lines enclosing the text look better */
1140	for (int i=iSize; i>0; i--)
1141	putchar('*');
1142	putchar('\n');
1143	#endif
1144	}
1145
1146	#ifndef RT_OS_OS2
1147	if (daemon_pipe_fds[1] >= 0)
1148	{
1149	printf ("\nStarting event loop....\n[send TERM signal to quit]\n");
1150	/* now we're ready, signal the parent process */
1151	write(daemon_pipe_fds[1], "READY", strlen("READY"));
1152	}
1153	else
1154	#endif
1155	{
1156	printf ("\nStarting event loop....\n[press Ctrl-C to quit]\n");
1157	}
1158
1159	if (pszPidFile)
1160	{
1161	char szBuf[32];
1162	const char *lf = "\n";
1163	RTFileOpen(&pidFile, pszPidFile, RTFILE_O_WRITE \| RTFILE_O_CREATE_REPLACE);
1164	RTStrFormatNumber(szBuf, getpid(), 10, 0, 0, 0);
1165	RTFileWrite(pidFile, szBuf, strlen(szBuf), NULL);
1166	RTFileWrite(pidFile, lf, strlen(lf), NULL);
1167	RTFileClose(pidFile);
1168	}
1169
1170	#ifndef RT_OS_OS2
1171	// Increase the file table size to 10240 or as high as possible.
1172	struct rlimit lim;
1173	if (getrlimit(RLIMIT_NOFILE, &lim) == 0)
1174	{
1175	if ( lim.rlim_cur < 10240
1176	&& lim.rlim_cur < lim.rlim_max)
1177	{
1178	lim.rlim_cur = RT_MIN(lim.rlim_max, 10240);
1179	if (setrlimit(RLIMIT_NOFILE, &lim) == -1)
1180	printf("WARNING: failed to increase file descriptor limit. (%d)\n", errno);
1181	}
1182	}
1183	else
1184	printf("WARNING: failed to obtain per-process file-descriptor limit (%d).\n", errno);
1185	#endif
1186
1187	PLEvent *ev;
1188	while (gKeepRunning)
1189	{
1190	gEventQ->WaitForEvent (&ev);
1191	gEventQ->HandleEvent (ev);
1192	}
1193
1194	/* stop accepting new events. Clients that happen to resolve our
1195	* name and issue a CreateInstance() request after this point will
1196	* get NS_ERROR_ABORT once we hande the remaining messages. As a
1197	* result, they should try to start a new server process. */
1198	gEventQ->StopAcceptingEvents();
1199
1200	/* unregister ourselves. After this point, clients will start a new
1201	* process because they won't be able to resolve the server name.*/
1202	gIpcServ->RemoveName (VBOXSVC_IPC_NAME);
1203
1204	/* process any remaining events. These events may include
1205	* CreateInstance() requests received right before we called
1206	* StopAcceptingEvents() above. We will detect this case below,
1207	* restore gKeepRunning and continue to serve. */
1208	gEventQ->ProcessPendingEvents();
1209
1210	printf ("Terminated event loop.\n");
1211	}
1212	while (0); // this scopes the nsCOMPtrs
1213
1214	NS_IF_RELEASE (gIpcServ);
1215	NS_IF_RELEASE (gEventQ);
1216
1217	/* no nsCOMPtrs are allowed to be alive when you call com::Shutdown(). */
1218
1219	LogFlowFunc (("Calling com::Shutdown()...\n"));
1220	rc = com::Shutdown();
1221	LogFlowFunc (("Finished com::Shutdown() (rc=%08X)\n", rc));
1222
1223	if (NS_FAILED (rc))
1224	printf ("ERROR: Failed to shutdown XPCOM! (rc=%08X)\n", rc);
1225
1226	printf ("XPCOM server has shutdown.\n");
1227
1228	if (pszPidFile)
1229	{
1230	RTFileDelete(pszPidFile);
1231	}
1232
1233	#ifndef RT_OS_OS2
1234	if (daemon_pipe_fds[1] >= 0)
1235	{
1236	/* close writing end of the pipe as well */
1237	close(daemon_pipe_fds[1]);
1238	}
1239	#endif
1240
1241	return 0;
1242	}

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source: vbox/trunk/src/VBox/Main/xpcom/server.cpp@ 16684

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