server.cpp@ 8215

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1	/* $Id: server.cpp 8155 2008-04-18 15:16:47Z 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	#include <ipcIService.h>
23	#include <ipcCID.h>
24
25	#include <nsIComponentRegistrar.h>
26
27	#if defined(XPCOM_GLUE)
28	#include <nsXPCOMGlue.h>
29	#endif
30
31	#include <nsEventQueueUtils.h>
32	#include <nsGenericFactory.h>
33
34	#include "linux/server.h"
35
36	#include "Logging.h"
37
38	#include <iprt/runtime.h>
39	#include <iprt/path.h>
40	#include <iprt/critsect.h>
41	#include <iprt/timer.h>
42
43	#include <VBox/param.h>
44	#include <VBox/version.h>
45
46	#include <VBox/com/com.h>
47
48	#include <stdio.h>
49
50	// for the signal handler
51	#include <signal.h>
52	#include <stdlib.h>
53	#include <unistd.h>
54	#include <errno.h>
55	#include <getopt.h>
56
57	// for the backtrace signal handler
58	#if defined(DEBUG) && defined(RT_OS_LINUX)
59	# define USE_BACKTRACE
60	#endif
61	#if defined(USE_BACKTRACE)
62	# include <execinfo.h>
63	// get REG_EIP/RIP from ucontext.h
64	# ifndef __USE_GNU
65	# define __USE_GNU
66	# endif
67	# include <ucontext.h>
68	# ifdef RT_ARCH_AMD64
69	# define REG_PC REG_RIP
70	# else
71	# define REG_PC REG_EIP
72	# endif
73	#endif
74
75	/////////////////////////////////////////////////////////////////////////////
76	// VirtualBox component instantiation
77	/////////////////////////////////////////////////////////////////////////////
78
79	#include <nsIGenericFactory.h>
80
81	#include <VirtualBox_XPCOM.h>
82	#include <VirtualBoxImpl.h>
83	#include <MachineImpl.h>
84	#include <SnapshotImpl.h>
85	#include <HardDiskImpl.h>
86	#include <ProgressImpl.h>
87	#include <DVDDriveImpl.h>
88	#include <FloppyDriveImpl.h>
89	#include <VRDPServerImpl.h>
90	#include <DVDImageImpl.h>
91	#include <FloppyImageImpl.h>
92	#include <SharedFolderImpl.h>
93	#include <HostImpl.h>
94	#include <HostDVDDriveImpl.h>
95	#include <HostFloppyDriveImpl.h>
96	#include <GuestOSTypeImpl.h>
97	#include <NetworkAdapterImpl.h>
98	#include <SerialPortImpl.h>
99	#include <ParallelPortImpl.h>
100	#include <USBControllerImpl.h>
101	#ifdef VBOX_WITH_USB
102	# include <HostUSBDeviceImpl.h>
103	# include <USBDeviceImpl.h>
104	#endif
105	#include <SATAControllerImpl.h>
106	#include <AudioAdapterImpl.h>
107	#include <SystemPropertiesImpl.h>
108	#include <Collection.h>
109
110	// implement nsISupports parts of our objects with support for nsIClassInfo
111	NS_DECL_CLASSINFO(VirtualBox)
112	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(VirtualBox, IVirtualBox)
113	NS_DECL_CLASSINFO(Machine)
114	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(Machine, IMachine)
115	NS_DECL_CLASSINFO(SessionMachine)
116	NS_IMPL_THREADSAFE_ISUPPORTS2_CI(SessionMachine, IMachine, IInternalMachineControl)
117	NS_DECL_CLASSINFO(SnapshotMachine)
118	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(SnapshotMachine, IMachine)
119	NS_DECL_CLASSINFO(Snapshot)
120	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(Snapshot, ISnapshot)
121	NS_DECL_CLASSINFO(HardDisk)
122	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(HardDisk, IHardDisk)
123	NS_DECL_CLASSINFO(HVirtualDiskImage)
124	NS_IMPL_THREADSAFE_ISUPPORTS2_CI(HVirtualDiskImage, IHardDisk, IVirtualDiskImage)
125	NS_DECL_CLASSINFO(HISCSIHardDisk)
126	NS_IMPL_THREADSAFE_ISUPPORTS2_CI(HISCSIHardDisk, IHardDisk, IISCSIHardDisk)
127	NS_DECL_CLASSINFO(HVMDKImage)
128	NS_IMPL_THREADSAFE_ISUPPORTS2_CI(HVMDKImage, IHardDisk, IVMDKImage)
129	NS_DECL_CLASSINFO(HCustomHardDisk)
130	NS_IMPL_THREADSAFE_ISUPPORTS2_CI(HCustomHardDisk, IHardDisk, ICustomHardDisk)
131	NS_DECL_CLASSINFO(HVHDImage)
132	NS_IMPL_THREADSAFE_ISUPPORTS2_CI(HVHDImage, IHardDisk, IVHDImage)
133	NS_DECL_CLASSINFO(HardDiskAttachment)
134	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(HardDiskAttachment, IHardDiskAttachment)
135	NS_DECL_CLASSINFO(Progress)
136	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(Progress, IProgress)
137	NS_DECL_CLASSINFO(CombinedProgress)
138	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(CombinedProgress, IProgress)
139	NS_DECL_CLASSINFO(DVDDrive)
140	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(DVDDrive, IDVDDrive)
141	NS_DECL_CLASSINFO(FloppyDrive)
142	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(FloppyDrive, IFloppyDrive)
143	NS_DECL_CLASSINFO(SharedFolder)
144	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(SharedFolder, ISharedFolder)
145	#ifdef VBOX_VRDP
146	NS_DECL_CLASSINFO(VRDPServer)
147	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(VRDPServer, IVRDPServer)
148	#endif
149	NS_DECL_CLASSINFO(DVDImage)
150	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(DVDImage, IDVDImage)
151	NS_DECL_CLASSINFO(FloppyImage)
152	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(FloppyImage, IFloppyImage)
153	NS_DECL_CLASSINFO(Host)
154	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(Host, IHost)
155	NS_DECL_CLASSINFO(HostDVDDrive)
156	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(HostDVDDrive, IHostDVDDrive)
157	NS_DECL_CLASSINFO(HostFloppyDrive)
158	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(HostFloppyDrive, IHostFloppyDrive)
159	NS_DECL_CLASSINFO(GuestOSType)
160	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(GuestOSType, IGuestOSType)
161	NS_DECL_CLASSINFO(NetworkAdapter)
162	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(NetworkAdapter, INetworkAdapter)
163	NS_DECL_CLASSINFO(SerialPort)
164	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(SerialPort, ISerialPort)
165	NS_DECL_CLASSINFO(ParallelPort)
166	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(ParallelPort, IParallelPort)
167	NS_DECL_CLASSINFO(USBController)
168	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(USBController, IUSBController)
169	NS_DECL_CLASSINFO(SATAController)
170	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(SATAController, ISATAController)
171	#ifdef VBOX_WITH_USB
172	NS_DECL_CLASSINFO(USBDeviceFilter)
173	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(USBDeviceFilter, IUSBDeviceFilter)
174	NS_DECL_CLASSINFO(HostUSBDevice)
175	NS_IMPL_THREADSAFE_ISUPPORTS2_CI(HostUSBDevice, IUSBDevice, IHostUSBDevice)
176	NS_DECL_CLASSINFO(HostUSBDeviceFilter)
177	NS_IMPL_THREADSAFE_ISUPPORTS2_CI(HostUSBDeviceFilter, IUSBDeviceFilter, IHostUSBDeviceFilter)
178	#endif
179	NS_DECL_CLASSINFO(AudioAdapter)
180	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(AudioAdapter, IAudioAdapter)
181	NS_DECL_CLASSINFO(SystemProperties)
182	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(SystemProperties, ISystemProperties)
183	NS_DECL_CLASSINFO(BIOSSettings)
184	NS_IMPL_THREADSAFE_ISUPPORTS1_CI(BIOSSettings, IBIOSSettings)
185
186	// collections and enumerators
187	COM_IMPL_READONLY_ENUM_AND_COLLECTION(Machine)
188	COM_IMPL_READONLY_ENUM_AND_COLLECTION(Snapshot)
189	COM_IMPL_READONLY_ENUM_AND_COLLECTION(HardDiskAttachment)
190	COM_IMPL_READONLY_ENUM_AND_COLLECTION(GuestOSType)
191	COM_IMPL_READONLY_ENUM_AND_COLLECTION(HostDVDDrive)
192	COM_IMPL_READONLY_ENUM_AND_COLLECTION(HostFloppyDrive)
193	COM_IMPL_READONLY_ENUM_AND_COLLECTION(HardDisk)
194	COM_IMPL_READONLY_ENUM_AND_COLLECTION(DVDImage)
195	COM_IMPL_READONLY_ENUM_AND_COLLECTION(FloppyImage)
196	COM_IMPL_READONLY_ENUM_AND_COLLECTION(SharedFolder)
197	#ifdef VBOX_WITH_USB
198	COM_IMPL_READONLY_ENUM_AND_COLLECTION(HostUSBDevice)
199	COM_IMPL_READONLY_ENUM_AND_COLLECTION(HostUSBDeviceFilter)
200	COM_IMPL_READONLY_ENUM_AND_COLLECTION(USBDeviceFilter)
201	#endif
202
203	COM_IMPL_READONLY_ENUM_AND_COLLECTION_AS(Progress, IProgress)
204	#ifdef VBOX_WITH_USB
205	COM_IMPL_READONLY_ENUM_AND_COLLECTION_AS(IfaceUSBDevice, IUSBDevice)
206	#endif
207
208	////////////////////////////////////////////////////////////////////////////////
209
210	enum
211	{
212	/* Delay before shutting down the VirtualBox server after the last
213	* VirtualBox instance is released, in ms */
214	VBoxSVC_ShutdownDelay = 5000,
215	};
216
217	static bool gAutoShutdown = false;
218
219	static nsIEventQueue* gEventQ = nsnull;
220	static PRBool volatile gKeepRunning = PR_TRUE;
221
222	/////////////////////////////////////////////////////////////////////////////
223
224	/**
225	* Simple but smart PLEvent wrapper.
226	*
227	* @note Instances must be always created with <tt>operator new</tt>!
228	*/
229	class MyEvent
230	{
231	public:
232
233	MyEvent()
234	{
235	mEv.that = NULL;
236	};
237
238	/**
239	* Posts this event to the given message queue. This method may only be
240	* called once. @note On success, the event will be deleted automatically
241	* after it is delivered and handled. On failure, the event will delete
242	* itself before this method returns! The caller must not delete it in
243	* either case.
244	*/
245	nsresult postTo (nsIEventQueue *aEventQ)
246	{
247	AssertReturn (mEv.that == NULL, NS_ERROR_FAILURE);
248	AssertReturn (aEventQ, NS_ERROR_FAILURE);
249	nsresult rv = aEventQ->InitEvent (&mEv.e, NULL,
250	eventHandler, eventDestructor);
251	if (NS_SUCCEEDED (rv))
252	{
253	mEv.that = this;
254	rv = aEventQ->PostEvent (&mEv.e);
255	if (NS_SUCCEEDED (rv))
256	return rv;
257	}
258	delete this;
259	return rv;
260	}
261
262	virtual void *handler() = 0;
263
264	private:
265
266	struct Ev
267	{
268	PLEvent e;
269	MyEvent *that;
270	} mEv;
271
272	static void PR_CALLBACK eventHandler (PLEvent self)
273	{
274	return reinterpret_cast <Ev *> (self)->that->handler();
275	}
276
277	static void PR_CALLBACK eventDestructor (PLEvent *self)
278	{
279	delete reinterpret_cast <Ev *> (self)->that;
280	}
281	};
282
283	////////////////////////////////////////////////////////////////////////////////
284
285	/**
286	* VirtualBox class factory that destroys the created instance right after
287	* the last reference to it is released by the client, and recreates it again
288	* when necessary (so VirtualBox acts like a singleton object).
289	*/
290	class VirtualBoxClassFactory : public VirtualBox
291	{
292	public:
293
294	virtual ~VirtualBoxClassFactory()
295	{
296	LogFlowFunc (("Deleting VirtualBox...\n"));
297
298	FinalRelease();
299	sInstance = 0;
300
301	LogFlowFunc (("VirtualBox object deleted.\n"));
302	printf ("Informational: VirtualBox object deleted.\n");
303	}
304
305	NS_IMETHOD_(nsrefcnt) Release()
306	{
307	/* we overload Release() to guarantee the VirtualBox destructor is
308	* always called on the main thread */
309
310	nsrefcnt count = VirtualBox::Release();
311
312	if (count == 1)
313	{
314	/* the last reference held by clients is being released
315	* (see GetInstance()) */
316
317	PRBool onMainThread = PR_TRUE;
318	if (gEventQ)
319	gEventQ->IsOnCurrentThread (&onMainThread);
320
321	PRBool timerStarted = PR_FALSE;
322
323	/* sTimes is null if this call originates from
324	* FactoryDestructor() */
325	if (sTimer != NULL)
326	{
327	LogFlowFunc (("Last VirtualBox instance was released.\n"));
328	LogFlowFunc (("Scheduling server shutdown in %d ms...\n",
329	VBoxSVC_ShutdownDelay));
330
331	/* make sure the previous timer (if any) is stopped;
332	* otherwise RTTimerStart() will definitely fail. */
333	RTTimerStop (sTimer);
334
335	int vrc = RTTimerStart (sTimer, uint64_t (VBoxSVC_ShutdownDelay) * 1000000);
336	AssertRC (vrc);
337	timerStarted = SUCCEEDED (vrc);
338	}
339	else
340	{
341	LogFlowFunc (("Last VirtualBox instance was released "
342	"on XPCOM shutdown.\n"));
343	Assert (onMainThread);
344	}
345
346	if (!timerStarted)
347	{
348	if (!onMainThread)
349	{
350	/* Failed to start the timer, post the shutdown event
351	* manually if not on the main thread alreay. */
352	ShutdownTimer (NULL, NULL);
353	}
354	else
355	{
356	/* Here we come if:
357	*
358	* a) gEventQ is 0 which means either FactoryDestructor() is called
359	* or the IPC/DCONNECT shutdown sequence is initiated by the
360	* XPCOM shutdown routine (NS_ShutdownXPCOM()), which always
361	* happens on the main thread.
362	*
363	* b) gEventQ has reported we're on the main thread. This means
364	* that DestructEventHandler() has been called, but another
365	* client was faster and requested VirtualBox again.
366	*
367	* In either case, there is nothing to do.
368	*
369	* Note: case b) is actually no more valid since we don't
370	* call Release() from DestructEventHandler() in this case
371	* any more. Thus, we assert below.
372	*/
373
374	Assert (gEventQ == NULL);
375	}
376	}
377	}
378
379	return count;
380	}
381
382	class MaybeQuitEvent : public MyEvent
383	{
384	/* called on the main thread */
385	void *handler()
386	{
387	LogFlowFunc (("\n"));
388
389	Assert (RTCritSectIsInitialized (&sLock));
390
391	/* stop accepting GetInstance() requests on other threads during
392	* possible destruction */
393	RTCritSectEnter (&sLock);
394
395	nsrefcnt count = 0;
396
397	/* sInstance is NULL here if it was deleted immediately after
398	* creation due to initialization error. See GetInstance(). */
399	if (sInstance != NULL)
400	{
401	/* Release the guard reference added in GetInstance() */
402	count = sInstance->Release();
403	}
404
405	if (count == 0)
406	{
407	if (gAutoShutdown)
408	{
409	Assert (sInstance == NULL);
410	LogFlowFunc (("Terminating the server process...\n"));
411	/* make it leave the event loop */
412	gKeepRunning = PR_FALSE;
413	}
414	}
415	else
416	{
417	/* This condition is quite rare: a new client will have to
418	* connect after this event has been posted to the main queue
419	* but before it started to process it. */
420	LogFlowFunc (("Destruction is canceled (refcnt=%d).\n", count));
421	}
422
423	RTCritSectLeave (&sLock);
424
425	return NULL;
426	}
427	};
428
429	static void ShutdownTimer (PRTTIMER pTimer, void *pvUser)
430	{
431	NOREF (pTimer);
432	NOREF (pvUser);
433
434	/* A "too late" event is theoretically possible if somebody
435	* manually ended the server after a destruction has been scheduled
436	* and this method was so lucky that it got a chance to run before
437	* the timer was killed. */
438	AssertReturnVoid (gEventQ);
439
440	/* post a quit event to the main queue */
441	MaybeQuitEvent *ev = new MaybeQuitEvent();
442	nsresult rv = ev->postTo (gEventQ);
443	NOREF (rv);
444
445	/* A failure above means we've been already stopped (for example
446	* by Ctrl-C). FactoryDestructor() (NS_ShutdownXPCOM())
447	* will do the job. Nothing to do. */
448	}
449
450	static NS_IMETHODIMP FactoryConstructor()
451	{
452	LogFlowFunc (("\n"));
453
454	/* create a critsect to protect object construction */
455	if (VBOX_FAILURE (RTCritSectInit (&sLock)))
456	return NS_ERROR_OUT_OF_MEMORY;
457
458	int vrc = RTTimerCreateEx (&sTimer, 0, 0, ShutdownTimer, NULL);
459	if (VBOX_FAILURE (vrc))
460	{
461	LogFlowFunc (("Failed to create a timer! (vrc=%Vrc)\n", vrc));
462	return NS_ERROR_FAILURE;
463	}
464
465	return NS_OK;
466	}
467
468	static NS_IMETHODIMP FactoryDestructor()
469	{
470	LogFlowFunc (("\n"));
471
472	RTTimerDestroy (sTimer);
473	sTimer = NULL;
474
475	RTCritSectDelete (&sLock);
476
477	if (sInstance)
478	{
479	/* Either posting a destruction event falied for some reason (most
480	* likely, the quit event has been received before the last release),
481	* or the client has terminated abnormally w/o releasing its
482	* VirtualBox instance (so NS_ShutdownXPCOM() is doing a cleanup).
483	* Release the guard reference we added in GetInstance(). */
484	sInstance->Release();
485	}
486
487	return NS_OK;
488	}
489
490	static nsresult GetInstance (VirtualBox **inst)
491	{
492	LogFlowFunc (("Getting VirtualBox object...\n"));
493
494	RTCritSectEnter (&sLock);
495
496	int rv = NS_OK;
497
498	if (sInstance == 0)
499	{
500	LogFlowFunc (("Creating new VirtualBox object...\n"));
501	sInstance = new VirtualBoxClassFactory();
502	if (sInstance)
503	{
504	/* make an extra AddRef to take the full control
505	* on the VirtualBox destruction (see FinalRelease()) */
506	sInstance->AddRef();
507
508	sInstance->AddRef(); /* protect FinalConstruct() */
509	rv = sInstance->FinalConstruct();
510	printf ("Informational: VirtualBox object created (rc=%08X).\n", rv);
511	if (NS_FAILED (rv))
512	{
513	/* On failure diring VirtualBox initialization, delete it
514	* immediately on the current thread by releasing all
515	* references in order to properly schedule the server
516	* shutdown. Since the object is fully deleted here, there
517	* is a chance to fix the error and request a new
518	* instantiation before the server terminates. However,
519	* the main reason to maintain the shoutdown delay on
520	* failure is to let the front-end completely fetch error
521	* info from a server-side IVirtualBoxErrorInfo object. */
522	sInstance->Release();
523	sInstance->Release();
524	Assert (sInstance == 0);
525	}
526	else
527	{
528	/* On success, make sure the previous timer is stopped to
529	* cancel a scheduled server termination (if any). */
530	RTTimerStop (sTimer);
531	}
532	}
533	else
534	{
535	rv = NS_ERROR_OUT_OF_MEMORY;
536	}
537	}
538	else
539	{
540	LogFlowFunc (("Using existing VirtualBox object...\n"));
541	nsrefcnt count = sInstance->AddRef();
542	Assert (count > 1);
543
544	if (count == 2)
545	{
546	LogFlowFunc (("Another client has requested a reference to VirtualBox, "
547	"canceling detruction...\n"));
548
549	/* make sure the previous timer is stopped */
550	RTTimerStop (sTimer);
551	}
552	}
553
554	*inst = sInstance;
555
556	RTCritSectLeave (&sLock);
557
558	return rv;
559	}
560
561	private:
562
563	/* Don't be confused that sInstance is of the *ClassFactory type. This is
564	* actually a singleton instance (*ClassFactory inherits the singleton
565	* class; we combined them just for "simplicity" and used "static" for
566	* factory methods. *ClassFactory here is necessary for a couple of extra
567	* methods. */
568
569	static VirtualBoxClassFactory *sInstance;
570	static RTCRITSECT sLock;
571
572	static PRTTIMER sTimer;
573	};
574
575	VirtualBoxClassFactory *VirtualBoxClassFactory::sInstance = 0;
576	RTCRITSECT VirtualBoxClassFactory::sLock = {0};
577
578	PRTTIMER VirtualBoxClassFactory::sTimer = NULL;
579
580	NS_GENERIC_FACTORY_SINGLETON_CONSTRUCTOR_WITH_RC
581	(VirtualBox, VirtualBoxClassFactory::GetInstance)
582
583	////////////////////////////////////////////////////////////////////////////////
584
585	typedef NSFactoryDestructorProcPtr NSFactoryConsructorProcPtr;
586
587	/**
588	* Enhanced module component information structure.
589	*
590	* nsModuleComponentInfo lacks the factory construction callback, here we add
591	* it. This callback is called by NS_NewGenericFactoryEx() after a
592	* nsGenericFactory instance is successfully created.
593	*/
594	struct nsModuleComponentInfoEx : nsModuleComponentInfo
595	{
596	nsModuleComponentInfoEx () {}
597	nsModuleComponentInfoEx (int) {}
598
599	nsModuleComponentInfoEx (
600	const char* aDescription,
601	const nsCID& aCID,
602	const char* aContractID,
603	NSConstructorProcPtr aConstructor,
604	NSRegisterSelfProcPtr aRegisterSelfProc,
605	NSUnregisterSelfProcPtr aUnregisterSelfProc,
606	NSFactoryDestructorProcPtr aFactoryDestructor,
607	NSGetInterfacesProcPtr aGetInterfacesProc,
608	NSGetLanguageHelperProcPtr aGetLanguageHelperProc,
609	nsIClassInfo ** aClassInfoGlobal,
610	PRUint32 aFlags,
611	NSFactoryConsructorProcPtr aFactoryConstructor)
612	{
613	mDescription = aDescription;
614	mCID = aCID;
615	mContractID = aContractID;
616	mConstructor = aConstructor;
617	mRegisterSelfProc = aRegisterSelfProc;
618	mUnregisterSelfProc = aUnregisterSelfProc;
619	mFactoryDestructor = aFactoryDestructor;
620	mGetInterfacesProc = aGetInterfacesProc;
621	mGetLanguageHelperProc = aGetLanguageHelperProc;
622	mClassInfoGlobal = aClassInfoGlobal;
623	mFlags = aFlags;
624	mFactoryConstructor = aFactoryConstructor;
625	}
626
627	/** (optional) Factory Construction Callback */
628	NSFactoryConsructorProcPtr mFactoryConstructor;
629	};
630
631	////////////////////////////////////////////////////////////////////////////////
632
633	static const nsModuleComponentInfoEx components[] =
634	{
635	nsModuleComponentInfoEx (
636	"VirtualBox component",
637	(nsCID) NS_VIRTUALBOX_CID,
638	NS_VIRTUALBOX_CONTRACTID,
639	VirtualBoxConstructor, // constructor funcion
640	NULL, // registration function
641	NULL, // deregistration function
642	VirtualBoxClassFactory::FactoryDestructor, // factory destructor function
643	NS_CI_INTERFACE_GETTER_NAME(VirtualBox),
644	NULL, // language helper
645	&NS_CLASSINFO_NAME(VirtualBox),
646	0, // flags
647	VirtualBoxClassFactory::FactoryConstructor // factory constructor function
648	)
649	};
650
651	/////////////////////////////////////////////////////////////////////////////
652
653	/**
654	* Extends NS_NewGenericFactory() by immediately calling
655	* nsModuleComponentInfoEx::mFactoryConstructor before returning to the
656	* caller.
657	*/
658	nsresult
659	NS_NewGenericFactoryEx (nsIGenericFactory **result,
660	const nsModuleComponentInfoEx *info)
661	{
662	AssertReturn (result, NS_ERROR_INVALID_POINTER);
663
664	nsresult rv = NS_NewGenericFactory (result, info);
665	if (NS_SUCCEEDED (rv) && info && info->mFactoryConstructor)
666	{
667	rv = info->mFactoryConstructor();
668	if (NS_FAILED (rv))
669	NS_RELEASE (*result);
670	}
671
672	return rv;
673	}
674
675	/////////////////////////////////////////////////////////////////////////////
676
677	/**
678	* Hhelper function to register self components upon start-up
679	* of the out-of-proc server.
680	*/
681	static nsresult
682	RegisterSelfComponents (nsIComponentRegistrar *registrar,
683	const nsModuleComponentInfoEx *components,
684	PRUint32 count)
685	{
686	nsresult rc = NS_OK;
687	const nsModuleComponentInfoEx *info = components;
688	for (PRUint32 i = 0; i < count && NS_SUCCEEDED (rc); i++, info++)
689	{
690	/* skip components w/o a constructor */
691	if (!info->mConstructor) continue;
692	/* create a new generic factory for a component and register it */
693	nsIGenericFactory *factory;
694	rc = NS_NewGenericFactoryEx (&factory, info);
695	if (NS_SUCCEEDED (rc))
696	{
697	rc = registrar->RegisterFactory (info->mCID,
698	info->mDescription,
699	info->mContractID,
700	factory);
701	factory->Release();
702	}
703	}
704	return rc;
705	}
706
707	/////////////////////////////////////////////////////////////////////////////
708
709	static ipcIService *gIpcServ = nsnull;
710	static char *pszPidFile = NULL;
711
712	class ForceQuitEvent : public MyEvent
713	{
714	void *handler()
715	{
716	LogFlowFunc (("\n"));
717
718	gKeepRunning = PR_FALSE;
719
720	if (pszPidFile)
721	RTFileDelete(pszPidFile);
722
723	return NULL;
724	}
725	};
726
727	static void signal_handler (int sig)
728	{
729	if (gEventQ && gKeepRunning)
730	{
731	/* post a quit event to the queue */
732	ForceQuitEvent *ev = new ForceQuitEvent();
733	ev->postTo (gEventQ);
734	}
735	}
736
737	#if defined(USE_BACKTRACE)
738	/**
739	* the signal handler that prints out a backtrace of the call stack.
740	* the code is taken from http://www.linuxjournal.com/article/6391.
741	*/
742	static void bt_sighandler (int sig, siginfo_t info, void secret)
743	{
744
745	void *trace[16];
746	char messages = (char )NULL;
747	int i, trace_size = 0;
748	ucontext_t uc = (ucontext_t )secret;
749
750	// Do something useful with siginfo_t
751	if (sig == SIGSEGV)
752	Log (("Got signal %d, faulty address is %p, from %p\n",
753	sig, info->si_addr, uc->uc_mcontext.gregs[REG_PC]));
754	else
755	Log (("Got signal %d\n", sig));
756
757	trace_size = backtrace (trace, 16);
758	// overwrite sigaction with caller's address
759	trace[1] = (void *) uc->uc_mcontext.gregs [REG_PC];
760
761	messages = backtrace_symbols (trace, trace_size);
762	// skip first stack frame (points here)
763	Log (("[bt] Execution path:\n"));
764	for (i = 1; i < trace_size; ++i)
765	Log (("[bt] %s\n", messages[i]));
766
767	exit (0);
768	}
769	#endif
770
771	int main (int argc, char **argv)
772	{
773	const struct option options[] =
774	{
775	{ "automate", no_argument, NULL, 'a' },
776	#ifdef RT_OS_DARWIN
777	{ "auto-shutdown", no_argument, NULL, 'A' },
778	#endif
779	{ "daemonize", no_argument, NULL, 'd' },
780	{ "pidfile", required_argument, NULL, 'p' },
781	#ifdef RT_OS_DARWIN
782	{ "pipe", required_argument, NULL, 'P' },
783	#endif
784	{ NULL, 0, NULL, 0 }
785	};
786	int c;
787
788	bool fDaemonize = false;
789	#ifndef RT_OS_OS2
790	static int daemon_pipe_fds[2] = {-1, -1};
791	#endif
792
793	for (;;)
794	{
795	c = getopt_long(argc, argv, "", options, NULL);
796	if (c == -1)
797	break;
798	switch (c)
799	{
800	case 'a':
801	{
802	/* --automate mode means we are started by XPCOM on
803	* demand. Daemonize ourselves and activate
804	* auto-shutdown. */
805	gAutoShutdown = true;
806	fDaemonize = true;
807	break;
808	}
809
810	#ifdef RT_OS_DARWIN
811	/* Used together with '-P', see below. Internal use only. */
812	case 'A':
813	{
814	gAutoShutdown = true;
815	break;
816	}
817	#endif
818
819	case 'd':
820	{
821	fDaemonize = true;
822	break;
823	}
824
825	case 'p':
826	{
827	pszPidFile = optarg;
828	break;
829	}
830
831	#ifdef RT_OS_DARWIN
832	/* we need to exec on darwin, this is just an internal
833	* hack for passing the pipe fd along to the final child. */
834	case 'P':
835	{
836	daemon_pipe_fds[1] = atoi(optarg);
837	break;
838	}
839	#endif
840
841	default:
842	{
843	/* exit on invalid options */
844	return 1;
845	}
846	}
847	}
848
849	static RTFILE pidFile = NIL_RTFILE;
850
851	#ifdef RT_OS_OS2
852
853	/* nothing to do here, the process is supposed to be already
854	* started daemonized when it is necessary */
855	NOREF(fDaemonize);
856
857	#else // ifdef RT_OS_OS2
858
859	if (fDaemonize)
860	{
861	/* create a pipe for communication between child and parent */
862	if (pipe(daemon_pipe_fds) < 0)
863	{
864	printf("ERROR: pipe() failed (errno = %d)\n", errno);
865	return 1;
866	}
867
868	pid_t childpid = fork();
869	if (childpid == -1)
870	{
871	printf("ERROR: fork() failed (errno = %d)\n", errno);
872	return 1;
873	}
874
875	if (childpid != 0)
876	{
877	/* we're the parent process */
878	bool fSuccess = false;
879
880	/* close the writing end of the pipe */
881	close(daemon_pipe_fds[1]);
882
883	/* try to read a message from the pipe */
884	char msg[10] = {0}; /* initialize so it's NULL terminated */
885	if (read(daemon_pipe_fds[0], msg, sizeof(msg)) > 0)
886	{
887	if (strcmp(msg, "READY") == 0)
888	fSuccess = true;
889	else
890	printf ("ERROR: Unknown message from child "
891	"process (%s)\n", msg);
892	}
893	else
894	printf ("ERROR: 0 bytes read from child process\n");
895
896	/* close the reading end of the pipe as well and exit */
897	close(daemon_pipe_fds[0]);
898	return fSuccess ? 0 : 1;
899	}
900	/* we're the child process */
901
902	/* Create a new SID for the child process */
903	pid_t sid = setsid();
904	if (sid < 0)
905	{
906	printf("ERROR: setsid() failed (errno = %d)\n", errno);
907	return 1;
908	}
909
910	/* Need to do another for to get rid of the session leader status.
911	* Otherwise any accidentally opened tty will automatically become a
912	* controlling tty for the daemon process. */
913	childpid = fork();
914	if (childpid == -1)
915	{
916	printf("ERROR: second fork() failed (errno = %d)\n", errno);
917	return 1;
918	}
919
920	if (childpid != 0)
921	{
922	/* we're the parent process, just a dummy so terminate now */
923	exit(0);
924	}
925
926	/* Redirect standard i/o streams to /dev/null */
927	if (daemon_pipe_fds[0] > 2)
928	{
929	freopen ("/dev/null", "r", stdin);
930	freopen ("/dev/null", "w", stdout);
931	freopen ("/dev/null", "w", stderr);
932	}
933
934	/* close the reading end of the pipe */
935	close(daemon_pipe_fds[0]);
936
937	# ifdef RT_OS_DARWIN
938	/*
939	* On leopard we're no longer allowed to use some of the core API's
940	* after forking - this will cause us to hit an int3.
941	* So, we'll have to execv VBoxSVC once again and hand it the pipe
942	* and all other relevant options.
943	*/
944	const char *apszArgs[7];
945	unsigned i = 0;
946	apszArgs[i++] = argv[0];
947	apszArgs[i++] = "--pipe";
948	char szPipeArg[32];
949	RTStrPrintf (szPipeArg, sizeof (szPipeArg), "%d", daemon_pipe_fds[1]);
950	apszArgs[i++] = szPipeArg;
951	if (pszPidFile)
952	{
953	apszArgs[i++] = "--pidfile";
954	apszArgs[i++] = pszPidFile;
955	}
956	if (gAutoShutdown)
957	apszArgs[i++] = "--auto-shutdown";
958	apszArgs[i++] = NULL; Assert(i <= RT_ELEMENTS(apszArgs));
959	execv (apszArgs[0], (char * const *)apszArgs);
960	exit (0);
961	# endif
962	}
963
964	#endif // ifdef RT_OS_OS2
965
966	#if defined(USE_BACKTRACE)
967	{
968	/* install our signal handler to backtrace the call stack */
969	struct sigaction sa;
970	sa.sa_sigaction = bt_sighandler;
971	sigemptyset (&sa.sa_mask);
972	sa.sa_flags = SA_RESTART \| SA_SIGINFO;
973	sigaction (SIGSEGV, &sa, NULL);
974	sigaction (SIGBUS, &sa, NULL);
975	sigaction (SIGUSR1, &sa, NULL);
976	}
977	#endif
978
979	/*
980	* Initialize the VBox runtime without loading
981	* the support driver
982	*/
983	RTR3Init(false);
984
985	nsresult rc;
986
987	do
988	{
989	rc = com::Initialize();
990	if (NS_FAILED (rc))
991	{
992	printf ("ERROR: Failed to initialize XPCOM! (rc=%08X)\n", rc);
993	break;
994	}
995
996	nsCOMPtr <nsIComponentRegistrar> registrar;
997	rc = NS_GetComponentRegistrar (getter_AddRefs (registrar));
998	if (NS_FAILED (rc))
999	{
1000	printf ("ERROR: Failed to get component registrar! (rc=%08X)\n", rc);
1001	break;
1002	}
1003
1004	registrar->AutoRegister (nsnull);
1005	rc = RegisterSelfComponents (registrar, components,
1006	NS_ARRAY_LENGTH (components));
1007	if (NS_FAILED (rc))
1008	{
1009	printf ("ERROR: Failed to register server components! (rc=%08X)\n", rc);
1010	break;
1011	}
1012
1013	/* get the main thread's event queue (afaik, the dconnect service always
1014	* gets created upon XPCOM startup, so it will use the main (this)
1015	* thread's event queue to receive IPC events) */
1016	rc = NS_GetMainEventQ (&gEventQ);
1017	if (NS_FAILED (rc))
1018	{
1019	printf ("ERROR: Failed to get the main event queue! (rc=%08X)\n", rc);
1020	break;
1021	}
1022
1023	nsCOMPtr<ipcIService> ipcServ (do_GetService(IPC_SERVICE_CONTRACTID, &rc));
1024	if (NS_FAILED (rc))
1025	{
1026	printf ("ERROR: Failed to get IPC service! (rc=%08X)\n", rc);
1027	break;
1028	}
1029
1030	NS_ADDREF (gIpcServ = ipcServ);
1031
1032	LogFlowFunc (("Will use \"%s\" as server name.\n", VBOXSVC_IPC_NAME));
1033
1034	rc = gIpcServ->AddName (VBOXSVC_IPC_NAME);
1035	if (NS_FAILED (rc))
1036	{
1037	LogFlowFunc (("Failed to register the server name (rc=%08X)!\n"
1038	"Is another server already running?\n", rc));
1039
1040	printf ("ERROR: Failed to register the server name \"%s\" (rc=%08X)!\n"
1041	"Is another server already running?\n",
1042	VBOXSVC_IPC_NAME, rc);
1043	NS_RELEASE (gIpcServ);
1044	break;
1045	}
1046
1047	{
1048	/* setup signal handling to convert some signals to a quit event */
1049	struct sigaction sa;
1050	sa.sa_handler = signal_handler;
1051	sigemptyset (&sa.sa_mask);
1052	sa.sa_flags = 0;
1053	sigaction (SIGINT, &sa, NULL);
1054	sigaction (SIGQUIT, &sa, NULL);
1055	sigaction (SIGTERM, &sa, NULL);
1056	sigaction (SIGTRAP, &sa, NULL);
1057	}
1058
1059	{
1060	char szBuf[80];
1061	int iSize;
1062
1063	iSize = snprintf (szBuf, sizeof(szBuf),
1064	"Sun xVM VirtualBox XPCOM Server Version "
1065	VBOX_VERSION_STRING);
1066	for (int i=iSize; i>0; i--)
1067	putchar('*');
1068	printf ("\n%s\n", szBuf);
1069	printf ("(C) 2008 Sun Microsystems, Inc.\n"
1070	"All rights reserved.\n");
1071	#ifdef DEBUG
1072	printf ("Debug version.\n");
1073	#endif
1074	#if 0
1075	/* in my opinion two lines enclosing the text look better */
1076	for (int i=iSize; i>0; i--)
1077	putchar('*');
1078	putchar('\n');
1079	#endif
1080	}
1081
1082	#ifndef RT_OS_OS2
1083	if (daemon_pipe_fds[1] >= 0)
1084	{
1085	printf ("\nStarting event loop....\n[send TERM signal to quit]\n");
1086	/* now we're ready, signal the parent process */
1087	write(daemon_pipe_fds[1], "READY", strlen("READY"));
1088	}
1089	else
1090	#endif
1091	{
1092	printf ("\nStarting event loop....\n[press Ctrl-C to quit]\n");
1093	}
1094
1095	if (pszPidFile)
1096	{
1097	char szBuf[32];
1098	const char *lf = "\n";
1099	RTFileOpen(&pidFile, pszPidFile, RTFILE_O_WRITE \| RTFILE_O_CREATE_REPLACE);
1100	RTStrFormatNumber(szBuf, getpid(), 10, 0, 0, 0);
1101	RTFileWrite(pidFile, szBuf, strlen(szBuf), NULL);
1102	RTFileWrite(pidFile, lf, strlen(lf), NULL);
1103	RTFileClose(pidFile);
1104	}
1105
1106	PLEvent *ev;
1107	while (gKeepRunning)
1108	{
1109	gEventQ->WaitForEvent (&ev);
1110	gEventQ->HandleEvent (ev);
1111	}
1112
1113	gIpcServ->RemoveName (VBOXSVC_IPC_NAME);
1114
1115	/* stop accepting new events */
1116	gEventQ->StopAcceptingEvents();
1117
1118	/* process any remaining events */
1119	gEventQ->ProcessPendingEvents();
1120
1121	printf ("Terminated event loop.\n");
1122	}
1123	while (0); // this scopes the nsCOMPtrs
1124
1125	NS_IF_RELEASE (gIpcServ);
1126	NS_IF_RELEASE (gEventQ);
1127
1128	/* no nsCOMPtrs are allowed to be alive when you call com::Shutdown(). */
1129
1130	LogFlowFunc (("Calling com::Shutdown()...\n"));
1131	rc = com::Shutdown();
1132	LogFlowFunc (("Finished com::Shutdown() (rc=%08X)\n", rc));
1133
1134	if (NS_FAILED (rc))
1135	printf ("ERROR: Failed to shutdown XPCOM! (rc=%08X)\n", rc);
1136
1137	printf ("XPCOM server has shutdown.\n");
1138
1139	if (pszPidFile)
1140	{
1141	RTFileDelete(pszPidFile);
1142	}
1143
1144	#ifndef RT_OS_OS2
1145	if (daemon_pipe_fds[1] >= 0)
1146	{
1147	/* close writing end of the pipe as well */
1148	close(daemon_pipe_fds[1]);
1149	}
1150	#endif
1151
1152	return 0;
1153	}

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source: vbox/trunk/src/VBox/Main/linux/server.cpp@ 8215

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