TstHGCMMock.cpp

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1	/* $Id: TstHGCMMock.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */
2	/** @file
3	* TstHGCMMock.cpp - Mocking framework for testing HGCM-based host services.
4	*
5	* The goal is to run host service + Vbgl code as unmodified as possible as
6	* part of testcases to gain test coverage which otherwise wouldn't possible
7	* for heavily user-centric features like Shared Clipboard or drag'n drop (DnD).
8	*
9	* Currently, though, it's only the service that runs unmodified, the
10	* testcases does custom Vbgl work.
11	*/
12
13	/*
14	* Copyright (C) 2022-2024 Oracle and/or its affiliates.
15	*
16	* This file is part of VirtualBox base platform packages, as
17	* available from https://www.virtualbox.org.
18	*
19	* This program is free software; you can redistribute it and/or
20	* modify it under the terms of the GNU General Public License
21	* as published by the Free Software Foundation, in version 3 of the
22	* License.
23	*
24	* This program is distributed in the hope that it will be useful, but
25	* WITHOUT ANY WARRANTY; without even the implied warranty of
26	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
27	* General Public License for more details.
28	*
29	* You should have received a copy of the GNU General Public License
30	* along with this program; if not, see <https://www.gnu.org/licenses>.
31	*
32	* SPDX-License-Identifier: GPL-3.0-only
33	*/
34
35
36	/*********************************************************************************************************************************
37	* Header Files *
38	*********************************************************************************************************************************/
39	#include <VBox/HostServices/TstHGCMMock.h>
40
41	#include <iprt/asm.h>
42	#include <iprt/assert.h>
43	#include <iprt/list.h>
44	#include <iprt/mem.h>
45	#include <iprt/rand.h>
46	#include <iprt/semaphore.h>
47	#include <iprt/test.h>
48	#include <iprt/time.h>
49	#include <iprt/thread.h>
50	#include <iprt/utf16.h>
51
52	#include <VBox/err.h>
53	#include <VBox/VBoxGuestLib.h>
54	#include <VBox/hgcmsvc.h>
55
56
57	/*********************************************************************************************************************************
58	* Global Variables *
59	*********************************************************************************************************************************/
60	/** Static HGCM service to mock. */
61	static TSTHGCMMOCKSVC g_tstHgcmSvc;
62
63
64	/*********************************************************************************************************************************
65	* Internal functions *
66	*********************************************************************************************************************************/
67
68	/**
69	* Initializes a HGCM mock client.
70	*
71	* @return VBox status code.
72	* @param pClient Client instance to initialize.
73	* @param idClient HGCM client ID to assign.
74	* @param cbClient Size (in bytes) of service-specific (opaque) client data to allocate.
75	*/
76	static int tstHgcmMockClientInit(PTSTHGCMMOCKCLIENT pClient, uint32_t idClient, size_t cbClient)
77	{
78	RT_BZERO(pClient, sizeof(TSTHGCMMOCKCLIENT));
79
80	pClient->idClient = idClient;
81	if (cbClient)
82	{
83	pClient->pvClient = RTMemAllocZ(cbClient);
84	AssertPtrReturn(pClient->pvClient, VERR_NO_MEMORY);
85	pClient->cbClient = cbClient;
86	}
87
88	return RTSemEventCreate(&pClient->hEvent);
89	}
90
91	/**
92	* Destroys a HGCM mock client.
93	*
94	* @return VBox status code.
95	* @param pClient Client instance to destroy.
96	*/
97	static int tstHgcmMockClientDestroy(PTSTHGCMMOCKCLIENT pClient)
98	{
99	int rc = RTSemEventDestroy(pClient->hEvent);
100	if (RT_SUCCESS(rc))
101	{
102	if (pClient->pvClient)
103	{
104	Assert(pClient->cbClient);
105	RTMemFree(pClient->pvClient);
106	pClient->pvClient = NULL;
107	pClient->cbClient = 0;
108	}
109
110	pClient->hEvent = NIL_RTSEMEVENT;
111	}
112
113	return rc;
114	}
115
116	/** @copydoc VBOXHGCMSVCFNTABLE::pfnConnect */
117	static DECLCALLBACK(int) tstHgcmMockSvcConnect(PTSTHGCMMOCKSVC pSvc, void pvService, uint32_t pidClient)
118	{
119	RT_NOREF(pvService);
120
121	PTSTHGCMMOCKFN pFn = (PTSTHGCMMOCKFN)RTMemAllocZ(sizeof(TSTHGCMMOCKFN));
122	AssertPtrReturn(pFn, VERR_NO_MEMORY);
123
124	PTSTHGCMMOCKCLIENT pClient = &pSvc->aHgcmClient[pSvc->uNextClientId];
125
126	int rc = tstHgcmMockClientInit(pClient, pSvc->uNextClientId, pSvc->fnTable.cbClient);
127	if (RT_FAILURE(rc))
128	return rc;
129
130	pFn->enmType = TSTHGCMMOCKFNTYPE_CONNECT;
131	pFn->pClient = pClient;
132
133	RTListAppend(&pSvc->lstCall, &pFn->Node);
134	pFn = NULL; /* Thread takes ownership now. */
135
136	int rc2 = RTSemEventSignal(pSvc->hEventQueue);
137	AssertRCReturn(rc2, rc2);
138	rc2 = RTSemEventWait(pClient->hEvent, RT_MS_30SEC);
139	AssertRCReturn(rc2, rc2);
140
141	ASMAtomicIncU32(&pSvc->uNextClientId);
142
143	rc2 = RTSemEventSignal(pSvc->hEventConnect);
144	AssertRCReturn(rc2, rc2);
145
146	*pidClient = pClient->idClient;
147
148	return VINF_SUCCESS;
149	}
150
151	/** @copydoc VBOXHGCMSVCFNTABLE::pfnDisconnect */
152	static DECLCALLBACK(int) tstHgcmMockSvcDisconnect(PTSTHGCMMOCKSVC pSvc, void *pvService, uint32_t idClient)
153	{
154	RT_NOREF(pvService);
155
156	PTSTHGCMMOCKCLIENT pClient = &pSvc->aHgcmClient[idClient];
157
158	PTSTHGCMMOCKFN pFn = (PTSTHGCMMOCKFN)RTMemAllocZ(sizeof(TSTHGCMMOCKFN));
159	AssertPtrReturn(pFn, VERR_NO_MEMORY);
160
161	pFn->enmType = TSTHGCMMOCKFNTYPE_DISCONNECT;
162	pFn->pClient = pClient;
163
164	RTListAppend(&pSvc->lstCall, &pFn->Node);
165	pFn = NULL; /* Thread takes ownership now. */
166
167	int rc2 = RTSemEventSignal(pSvc->hEventQueue);
168	AssertRCReturn(rc2, rc2);
169
170	rc2 = RTSemEventWait(pClient->hEvent, RT_MS_30SEC);
171	AssertRCReturn(rc2, rc2);
172
173	return tstHgcmMockClientDestroy(pClient);
174	}
175
176	/** @copydoc VBOXHGCMSVCFNTABLE::pfnCall */
177	static DECLCALLBACK(int) tstHgcmMockSvcCall(PTSTHGCMMOCKSVC pSvc, void pvService, VBOXHGCMCALLHANDLE callHandle, uint32_t idClient, void pvClient,
178	int32_t function, uint32_t cParms, VBOXHGCMSVCPARM paParms[])
179	{
180	RT_NOREF(pvService, pvClient);
181
182	PTSTHGCMMOCKCLIENT pClient = &pSvc->aHgcmClient[idClient];
183
184	PTSTHGCMMOCKFN pFn = (PTSTHGCMMOCKFN)RTMemAllocZ(sizeof(TSTHGCMMOCKFN));
185	AssertPtrReturn(pFn, VERR_NO_MEMORY);
186
187	const size_t cbParms = cParms * sizeof(VBOXHGCMSVCPARM);
188
189	pFn->enmType = TSTHGCMMOCKFNTYPE_CALL;
190	pFn->pClient = pClient;
191
192	pFn->u.Call.hCall = callHandle;
193	pFn->u.Call.iFunc = function;
194	pFn->u.Call.cParms = cParms;
195	PVBOXHGCMSVCPARM const paParmsCopy = (PVBOXHGCMSVCPARM)RTMemDup(paParms, cbParms);
196	pFn->u.Call.pParms = paParmsCopy;
197	AssertPtrReturn(paParmsCopy, VERR_NO_MEMORY);
198
199	RTListAppend(&pSvc->lstCall, &pFn->Node);
200	pFn = NULL; /* Thread takes ownership now. We keep ownership of paParmsCopy. */
201
202	int rc2 = RTSemEventSignal(pSvc->hEventQueue);
203	AssertRCReturn(rc2, rc2);
204
205	rc2 = RTSemEventWait(pClient->hEvent, RT_INDEFINITE_WAIT);
206	AssertRCReturn(rc2, rc2);
207
208	memcpy(paParms, paParmsCopy, cbParms);
209	RTMemFree(paParmsCopy);
210
211	return VINF_SUCCESS; /** @todo Return host call rc */
212	}
213
214	/** @copydoc VBOXHGCMSVCFNTABLE::pfnHostCall
215	* @note Public for also being able to test host calls via testcases. */
216	int TstHgcmMockSvcHostCall(PTSTHGCMMOCKSVC pSvc, void *pvService, int32_t function, uint32_t cParms, VBOXHGCMSVCPARM paParms[])
217	{
218	RT_NOREF(pvService);
219	AssertReturn(pSvc->cHostCallers == 0, VERR_WRONG_ORDER); /* Only one host call at a time. */
220
221	pSvc->cHostCallers++;
222
223	PTSTHGCMMOCKFN pFn = (PTSTHGCMMOCKFN)RTMemAllocZ(sizeof(TSTHGCMMOCKFN));
224	AssertPtrReturn(pFn, VERR_INVALID_POINTER);
225
226	pFn->enmType = TSTHGCMMOCKFNTYPE_HOST_CALL;
227	pFn->u.HostCall.iFunc = function;
228	if (cParms)
229	{
230	pFn->u.HostCall.pParms = (PVBOXHGCMSVCPARM)RTMemDup(paParms, cParms * sizeof(VBOXHGCMSVCPARM));
231	AssertPtrReturn(pFn->u.HostCall.pParms, VERR_NO_MEMORY);
232	pFn->u.HostCall.cParms = cParms;
233	}
234
235	RTListAppend(&pSvc->lstCall, &pFn->Node);
236	pFn = NULL; /* Thread takes ownership now. */
237
238	int rc2 = RTSemEventSignal(pSvc->hEventQueue);
239	AssertRC(rc2);
240
241	rc2 = RTSemEventWait(pSvc->hEventHostCall, RT_INDEFINITE_WAIT);
242	AssertRCReturn(rc2, rc2);
243
244	Assert(pSvc->cHostCallers);
245	pSvc->cHostCallers--;
246
247	return pSvc->rcHostCall;
248	}
249
250	/**
251	* Call completion callback for guest calls.
252	*
253	* @return VBox status code.
254	* @param callHandle Call handle to complete.
255	* @param rc Return code to return to the caller.
256	*/
257	static DECLCALLBACK(int) tstHgcmMockSvcCallComplete(VBOXHGCMCALLHANDLE callHandle, int32_t rc)
258	{
259	PTSTHGCMMOCKSVC pSvc = TstHgcmMockSvcInst();
260
261	size_t i = 0;
262	for (; RT_ELEMENTS(pSvc->aHgcmClient); i++)
263	{
264	PTSTHGCMMOCKCLIENT pClient = &pSvc->aHgcmClient[i];
265	if (&pClient->hCall == callHandle) /* Slow, but works for now. */
266	{
267	if (rc == VINF_HGCM_ASYNC_EXECUTE)
268	{
269	Assert(pClient->fAsyncExec == false);
270	}
271	else /* Complete call + notify client. */
272	{
273	callHandle->rc = rc;
274
275	int rc2 = RTSemEventSignal(pClient->hEvent);
276	AssertRCReturn(rc2, rc2);
277	}
278
279	return VINF_SUCCESS;
280	}
281	}
282
283	return VERR_NOT_FOUND;
284	}
285
286	/**
287	* Main thread of HGCM mock service.
288	*
289	* @return VBox status code.
290	* @param hThread Thread handle.
291	* @param pvUser User-supplied data of type PTSTHGCMMOCKSVC.
292	*/
293	static DECLCALLBACK(int) tstHgcmMockSvcThread(RTTHREAD hThread, void *pvUser)
294	{
295	RT_NOREF(hThread);
296	PTSTHGCMMOCKSVC pSvc = (PTSTHGCMMOCKSVC)pvUser;
297
298	pSvc->uNextClientId = 0;
299
300	pSvc->fnTable.cbSize = sizeof(pSvc->fnTable);
301	pSvc->fnTable.u32Version = VBOX_HGCM_SVC_VERSION;
302
303	RT_ZERO(pSvc->fnHelpers);
304	pSvc->fnHelpers.pfnCallComplete = tstHgcmMockSvcCallComplete;
305	pSvc->fnTable.pHelpers = &pSvc->fnHelpers;
306
307	int rc = VBoxHGCMSvcLoad(&pSvc->fnTable);
308	if (RT_SUCCESS(rc))
309	{
310	RTThreadUserSignal(hThread);
311
312	for (;;)
313	{
314	rc = RTSemEventWait(pSvc->hEventQueue, 10 /* ms */);
315	if (ASMAtomicReadBool(&pSvc->fShutdown))
316	{
317	rc = VINF_SUCCESS;
318	break;
319	}
320	if (rc == VERR_TIMEOUT)
321	continue;
322
323	PTSTHGCMMOCKFN pFn = RTListGetFirst(&pSvc->lstCall, TSTHGCMMOCKFN, Node);
324	if (pFn)
325	{
326	switch (pFn->enmType)
327	{
328	case TSTHGCMMOCKFNTYPE_CONNECT:
329	{
330	rc = pSvc->fnTable.pfnConnect(pSvc->fnTable.pvService,
331	pFn->pClient->idClient, pFn->pClient->pvClient,
332	VMMDEV_REQUESTOR_USR_NOT_GIVEN /* fRequestor /, false / fRestoring */);
333
334	int rc2 = RTSemEventSignal(pFn->pClient->hEvent);
335	AssertRC(rc2);
336	break;
337	}
338
339	case TSTHGCMMOCKFNTYPE_DISCONNECT:
340	{
341	rc = pSvc->fnTable.pfnDisconnect(pSvc->fnTable.pvService,
342	pFn->pClient->idClient, pFn->pClient->pvClient);
343
344	int rc2 = RTSemEventSignal(pFn->pClient->hEvent);
345	AssertRC(rc2);
346	break;
347	}
348
349	case TSTHGCMMOCKFNTYPE_CALL:
350	{
351	pSvc->fnTable.pfnCall(pSvc->fnTable.pvService, pFn->u.Call.hCall, pFn->pClient->idClient,
352	pFn->pClient->pvClient, pFn->u.Call.iFunc, pFn->u.Call.cParms,
353	pFn->u.Call.pParms, RTTimeNanoTS());
354
355	/* Note: Call will be completed in the call completion callback. */
356	break;
357	}
358
359	case TSTHGCMMOCKFNTYPE_HOST_CALL:
360	{
361	pSvc->rcHostCall = pSvc->fnTable.pfnHostCall(pSvc->fnTable.pvService, pFn->u.HostCall.iFunc,
362	pFn->u.HostCall.cParms, pFn->u.HostCall.pParms);
363
364	int rc2 = RTSemEventSignal(pSvc->hEventHostCall);
365	AssertRC(rc2);
366	break;
367	}
368
369	default:
370	AssertFailed();
371	break;
372	}
373	RTListNodeRemove(&pFn->Node);
374	RTMemFree(pFn); /* Note! caller frees the parameters? Or at least it uses them again. */
375	}
376	}
377	}
378
379	return rc;
380	}
381
382
383	/*********************************************************************************************************************************
384	* Public functions *
385	*********************************************************************************************************************************/
386
387	/**
388	* Returns the pointer to the HGCM mock service instance.
389	*
390	* @return Pointer to HGCM mock service instance.
391	*/
392	PTSTHGCMMOCKSVC TstHgcmMockSvcInst(void)
393	{
394	return &g_tstHgcmSvc;
395	}
396
397	/**
398	* Waits for a HGCM mock client to connect, extended version.
399	*
400	* @return Pointer to connected client, or NULL if ran into timeout.
401	* @param pSvc HGCM mock service instance.
402	* @param msTimeout Timeout (in ms) to wait for connection.
403	*/
404	PTSTHGCMMOCKCLIENT TstHgcmMockSvcWaitForConnectEx(PTSTHGCMMOCKSVC pSvc, RTMSINTERVAL msTimeout)
405	{
406	int rc = RTSemEventWait(pSvc->hEventConnect, msTimeout);
407	if (RT_SUCCESS(rc))
408	{
409	Assert(pSvc->uNextClientId);
410	return &pSvc->aHgcmClient[pSvc->uNextClientId - 1];
411	}
412	return NULL;
413	}
414
415	/**
416	* Waits for a HGCM mock client to connect.
417	*
418	* @return Pointer to connected client, or NULL if waiting for connection was aborted.
419	* @param pSvc HGCM mock service instance.
420	*/
421	PTSTHGCMMOCKCLIENT TstHgcmMockSvcWaitForConnect(PTSTHGCMMOCKSVC pSvc)
422	{
423	return TstHgcmMockSvcWaitForConnectEx(pSvc, RT_MS_30SEC);
424	}
425
426	/**
427	* Creates a HGCM mock service instance.
428	*
429	* @return VBox status code.
430	* @param pSvc HGCM mock service instance to create.
431	*/
432	int TstHgcmMockSvcCreate(PTSTHGCMMOCKSVC pSvc)
433	{
434	RT_ZERO(pSvc->aHgcmClient);
435	pSvc->fShutdown = false;
436	int rc = RTSemEventCreate(&pSvc->hEventQueue);
437	if (RT_SUCCESS(rc))
438	{
439	rc = RTSemEventCreate(&pSvc->hEventHostCall);
440	if (RT_SUCCESS(rc))
441	{
442	rc = RTSemEventCreate(&pSvc->hEventConnect);
443	if (RT_SUCCESS(rc))
444	{
445	RTListInit(&pSvc->lstCall);
446	}
447	}
448	}
449
450	return rc;
451	}
452
453	/**
454	* Destroys a HGCM mock service instance.
455	*
456	* @return VBox status code.
457	* @param pSvc HGCM mock service instance to destroy.
458	*/
459	int TstHgcmMockSvcDestroy(PTSTHGCMMOCKSVC pSvc)
460	{
461	int rc = RTSemEventDestroy(pSvc->hEventQueue);
462	if (RT_SUCCESS(rc))
463	{
464	rc = RTSemEventDestroy(pSvc->hEventHostCall);
465	if (RT_SUCCESS(rc))
466	RTSemEventDestroy(pSvc->hEventConnect);
467	}
468	return rc;
469	}
470
471	/**
472	* Starts a HGCM mock service instance.
473	*
474	* @return VBox status code.
475	* @param pSvc HGCM mock service instance to start.
476	*/
477	int TstHgcmMockSvcStart(PTSTHGCMMOCKSVC pSvc)
478	{
479	int rc = RTThreadCreate(&pSvc->hThread, tstHgcmMockSvcThread, pSvc, 0, RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE,
480	"MockSvc");
481	if (RT_SUCCESS(rc))
482	rc = RTThreadUserWait(pSvc->hThread, RT_MS_30SEC);
483
484	return rc;
485	}
486
487	/**
488	* Stops a HGCM mock service instance.
489	*
490	* @return VBox status code.
491	* @param pSvc HGCM mock service instance to stop.
492	*/
493	int TstHgcmMockSvcStop(PTSTHGCMMOCKSVC pSvc)
494	{
495	ASMAtomicWriteBool(&pSvc->fShutdown, true);
496
497	int rcThread;
498	int rc = RTThreadWait(pSvc->hThread, RT_MS_30SEC, &rcThread);
499	if (RT_SUCCESS(rc))
500	rc = rcThread;
501	if (RT_SUCCESS(rc))
502	pSvc->hThread = NIL_RTTHREAD;
503
504	return rc;
505	}
506
507
508	/*********************************************************************************************************************************
509	* VbglR3 stubs *
510	*********************************************************************************************************************************/
511
512	/**
513	* Connects to an HGCM mock service.
514	*
515	* @returns VBox status code
516	* @param pszServiceName Name of the host service.
517	* @param pidClient Where to put the client ID on success. The client ID
518	* must be passed to all the other calls to the service.
519	*/
520	VBGLR3DECL(int) VbglR3HGCMConnect(const char pszServiceName, HGCMCLIENTID pidClient)
521	{
522	RT_NOREF(pszServiceName);
523
524	PTSTHGCMMOCKSVC pSvc = TstHgcmMockSvcInst();
525
526	return tstHgcmMockSvcConnect(pSvc, pSvc->fnTable.pvService, pidClient);
527	}
528
529	/**
530	* Disconnect from an HGCM mock service.
531	*
532	* @returns VBox status code.
533	* @param idClient The client id returned by VbglR3HGCMConnect().
534	*/
535	VBGLR3DECL(int) VbglR3HGCMDisconnect(HGCMCLIENTID idClient)
536	{
537	PTSTHGCMMOCKSVC pSvc = TstHgcmMockSvcInst();
538
539	return tstHgcmMockSvcDisconnect(pSvc, pSvc->fnTable.pvService, idClient);
540	}
541
542	/**
543	* Query the session ID of the mocked VM.
544	*
545	* @returns IPRT status code.
546	* @param pu64IdSession Session id (out).
547	*/
548	VBGLR3DECL(int) VbglR3GetSessionId(uint64_t *pu64IdSession)
549	{
550	if (pu64IdSession)
551	*pu64IdSession = 42;
552	return VINF_SUCCESS;
553	}
554
555	/**
556	* Makes a fully prepared HGCM call to an HGCM mock service.
557	*
558	* @returns VBox status code.
559	* @param pInfo Fully prepared HGCM call info.
560	* @param cbInfo Size of the info. This may sometimes be larger than
561	* what the parameter count indicates because of
562	* parameter changes between versions and such.
563	*/
564	VBGLR3DECL(int) VbglR3HGCMCall(PVBGLIOCHGCMCALL pInfo, size_t cbInfo)
565	{
566	RT_NOREF(cbInfo);
567
568	AssertMsg(pInfo->Hdr.cbIn == cbInfo, ("cbIn=%#x cbInfo=%#zx\n", pInfo->Hdr.cbIn, cbInfo));
569	AssertMsg(pInfo->Hdr.cbOut == cbInfo, ("cbOut=%#x cbInfo=%#zx\n", pInfo->Hdr.cbOut, cbInfo));
570	Assert(sizeof(pInfo) + pInfo->cParms sizeof(HGCMFunctionParameter) <= cbInfo);
571
572	HGCMFunctionParameter *offSrcParms = VBGL_HGCM_GET_CALL_PARMS(pInfo);
573	PVBOXHGCMSVCPARM paDstParms = (PVBOXHGCMSVCPARM)RTMemAlloc(pInfo->cParms * sizeof(VBOXHGCMSVCPARM));
574
575	uint16_t i = 0;
576	for (; i < pInfo->cParms; i++)
577	{
578	switch (offSrcParms->type)
579	{
580	case VMMDevHGCMParmType_32bit:
581	{
582	paDstParms[i].type = VBOX_HGCM_SVC_PARM_32BIT;
583	paDstParms[i].u.uint32 = offSrcParms->u.value32;
584	break;
585	}
586
587	case VMMDevHGCMParmType_64bit:
588	{
589	paDstParms[i].type = VBOX_HGCM_SVC_PARM_64BIT;
590	paDstParms[i].u.uint64 = offSrcParms->u.value64;
591	break;
592	}
593
594	case VMMDevHGCMParmType_LinAddr:
595	{
596	paDstParms[i].type = VBOX_HGCM_SVC_PARM_PTR;
597	paDstParms[i].u.pointer.addr = (void *)offSrcParms->u.LinAddr.uAddr;
598	paDstParms[i].u.pointer.size = offSrcParms->u.LinAddr.cb;
599	break;
600	}
601
602	default:
603	AssertFailed();
604	break;
605	}
606
607	offSrcParms++;
608	}
609
610	PTSTHGCMMOCKSVC const pSvc = TstHgcmMockSvcInst();
611
612	int rc2 = tstHgcmMockSvcCall(pSvc, pSvc->fnTable.pvService, &pSvc->aHgcmClient[pInfo->u32ClientID].hCall,
613	pInfo->u32ClientID, pSvc->aHgcmClient[pInfo->u32ClientID].pvClient,
614	pInfo->u32Function, pInfo->cParms, paDstParms);
615	if (RT_SUCCESS(rc2))
616	{
617	offSrcParms = VBGL_HGCM_GET_CALL_PARMS(pInfo);
618
619	for (i = 0; i < pInfo->cParms; i++)
620	{
621	paDstParms[i].type = offSrcParms->type;
622	switch (paDstParms[i].type)
623	{
624	case VMMDevHGCMParmType_32bit:
625	offSrcParms->u.value32 = paDstParms[i].u.uint32;
626	break;
627
628	case VMMDevHGCMParmType_64bit:
629	offSrcParms->u.value64 = paDstParms[i].u.uint64;
630	break;
631
632	case VMMDevHGCMParmType_LinAddr:
633	{
634	offSrcParms->u.LinAddr.cb = paDstParms[i].u.pointer.size;
635	break;
636	}
637
638	default:
639	AssertFailed();
640	break;
641	}
642
643	offSrcParms++;
644	}
645	}
646
647	RTMemFree(paDstParms);
648
649	if (RT_SUCCESS(rc2))
650	rc2 = pSvc->aHgcmClient[pInfo->u32ClientID].hCall.rc;
651
652	return rc2;
653	}
654

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source: vbox/trunk/src/VBox/HostServices/testcase/TstHGCMMock.cpp

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