DBGF.cpp@ 58170

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1	/* $Id: DBGF.cpp 58170 2015-10-12 09:27:14Z vboxsync $ */
2	/** @file
3	* DBGF - Debugger Facility.
4	*/
5
6	/*
7	* Copyright (C) 2006-2015 Oracle Corporation
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
18
19	/** @page pg_dbgf DBGF - The Debugger Facility
20	*
21	* The purpose of the DBGF is to provide an interface for debuggers to
22	* manipulate the VMM without having to mess up the source code for each of
23	* them. The DBGF is always built in and will always work when a debugger
24	* attaches to the VM. The DBGF provides the basic debugger features, such as
25	* halting execution, handling breakpoints, single step execution, instruction
26	* disassembly, info querying, OS specific diggers, symbol and module
27	* management.
28	*
29	* The interface is working in a manner similar to the win32, linux and os2
30	* debugger interfaces. The interface has an asynchronous nature. This comes
31	* from the fact that the VMM and the Debugger are running in different threads.
32	* They are referred to as the "emulation thread" and the "debugger thread", or
33	* as the "ping thread" and the "pong thread, respectivly. (The last set of
34	* names comes from the use of the Ping-Pong synchronization construct from the
35	* RTSem API.)
36	*
37	* @see grp_dbgf
38	*
39	*
40	* @section sec_dbgf_scenario Usage Scenario
41	*
42	* The debugger starts by attaching to the VM. For practical reasons we limit the
43	* number of concurrently attached debuggers to 1 per VM. The action of
44	* attaching to the VM causes the VM to check and generate debug events.
45	*
46	* The debugger then will wait/poll for debug events and issue commands.
47	*
48	* The waiting and polling is done by the DBGFEventWait() function. It will wait
49	* for the emulation thread to send a ping, thus indicating that there is an
50	* event waiting to be processed.
51	*
52	* An event can be a response to a command issued previously, the hitting of a
53	* breakpoint, or running into a bad/fatal VMM condition. The debugger now has
54	* the ping and must respond to the event at hand - the VMM is waiting. This
55	* usually means that the user of the debugger must do something, but it doesn't
56	* have to. The debugger is free to call any DBGF function (nearly at least)
57	* while processing the event.
58	*
59	* Typically the user will issue a request for the execution to be resumed, so
60	* the debugger calls DBGFResume() and goes back to waiting/polling for events.
61	*
62	* When the user eventually terminates the debugging session or selects another
63	* VM, the debugger detaches from the VM. This means that breakpoints are
64	* disabled and that the emulation thread no longer polls for debugger commands.
65	*
66	*/
67
68
69	/*********************************************************************************************************************************
70	* Header Files *
71	*********************************************************************************************************************************/
72	#define LOG_GROUP LOG_GROUP_DBGF
73	#include <VBox/vmm/dbgf.h>
74	#include <VBox/vmm/selm.h>
75	#ifdef VBOX_WITH_REM
76	# include <VBox/vmm/rem.h>
77	#endif
78	#include <VBox/vmm/em.h>
79	#include <VBox/vmm/hm.h>
80	#include "DBGFInternal.h"
81	#include <VBox/vmm/vm.h>
82	#include <VBox/vmm/uvm.h>
83	#include <VBox/err.h>
84
85	#include <VBox/log.h>
86	#include <iprt/semaphore.h>
87	#include <iprt/thread.h>
88	#include <iprt/asm.h>
89	#include <iprt/time.h>
90	#include <iprt/assert.h>
91	#include <iprt/stream.h>
92	#include <iprt/env.h>
93
94
95	/*********************************************************************************************************************************
96	* Internal Functions *
97	*********************************************************************************************************************************/
98	static int dbgfR3VMMWait(PVM pVM);
99	static int dbgfR3VMMCmd(PVM pVM, DBGFCMD enmCmd, PDBGFCMDDATA pCmdData, bool *pfResumeExecution);
100	static DECLCALLBACK(int) dbgfR3Attach(PVM pVM);
101
102
103	/**
104	* Sets the VMM Debug Command variable.
105	*
106	* @returns Previous command.
107	* @param pVM The cross context VM structure.
108	* @param enmCmd The command.
109	*/
110	DECLINLINE(DBGFCMD) dbgfR3SetCmd(PVM pVM, DBGFCMD enmCmd)
111	{
112	DBGFCMD rc;
113	if (enmCmd == DBGFCMD_NO_COMMAND)
114	{
115	Log2(("DBGF: Setting command to %d (DBGFCMD_NO_COMMAND)\n", enmCmd));
116	rc = (DBGFCMD)ASMAtomicXchgU32((uint32_t volatile )(void )&pVM->dbgf.s.enmVMMCmd, enmCmd);
117	VM_FF_CLEAR(pVM, VM_FF_DBGF);
118	}
119	else
120	{
121	Log2(("DBGF: Setting command to %d\n", enmCmd));
122	AssertMsg(pVM->dbgf.s.enmVMMCmd == DBGFCMD_NO_COMMAND, ("enmCmd=%d enmVMMCmd=%d\n", enmCmd, pVM->dbgf.s.enmVMMCmd));
123	rc = (DBGFCMD)ASMAtomicXchgU32((uint32_t volatile )(void )&pVM->dbgf.s.enmVMMCmd, enmCmd);
124	VM_FF_SET(pVM, VM_FF_DBGF);
125	VMR3NotifyGlobalFFU(pVM->pUVM, 0 /* didn't notify REM */);
126	}
127	return rc;
128	}
129
130
131	/**
132	* Initializes the DBGF.
133	*
134	* @returns VBox status code.
135	* @param pVM The cross context VM structure.
136	*/
137	VMMR3_INT_DECL(int) DBGFR3Init(PVM pVM)
138	{
139	PUVM pUVM = pVM->pUVM;
140	AssertCompile(sizeof(pUVM->dbgf.s) <= sizeof(pUVM->dbgf.padding));
141	AssertCompile(sizeof(pUVM->aCpus[0].dbgf.s) <= sizeof(pUVM->aCpus[0].dbgf.padding));
142
143	/*
144	* The usual sideways mountain climbing style of init:
145	*/
146	int rc = dbgfR3InfoInit(pUVM); /* (First, initalizes the shared critical section.) */
147	if (RT_SUCCESS(rc))
148	{
149	rc = dbgfR3TraceInit(pVM);
150	if (RT_SUCCESS(rc))
151	{
152	rc = dbgfR3RegInit(pUVM);
153	if (RT_SUCCESS(rc))
154	{
155	rc = dbgfR3AsInit(pUVM);
156	if (RT_SUCCESS(rc))
157	{
158	rc = dbgfR3BpInit(pVM);
159	if (RT_SUCCESS(rc))
160	{
161	rc = dbgfR3OSInit(pUVM);
162	if (RT_SUCCESS(rc))
163	{
164	rc = dbgfR3PlugInInit(pUVM);
165	if (RT_SUCCESS(rc))
166	{
167	return VINF_SUCCESS;
168	}
169	dbgfR3OSTerm(pUVM);
170	}
171	}
172	dbgfR3AsTerm(pUVM);
173	}
174	dbgfR3RegTerm(pUVM);
175	}
176	dbgfR3TraceTerm(pVM);
177	}
178	dbgfR3InfoTerm(pUVM);
179	}
180	return rc;
181	}
182
183
184	/**
185	* Terminates and cleans up resources allocated by the DBGF.
186	*
187	* @returns VBox status code.
188	* @param pVM The cross context VM structure.
189	*/
190	VMMR3_INT_DECL(int) DBGFR3Term(PVM pVM)
191	{
192	PUVM pUVM = pVM->pUVM;
193
194	dbgfR3PlugInTerm(pUVM);
195	dbgfR3OSTerm(pUVM);
196	dbgfR3AsTerm(pUVM);
197	dbgfR3RegTerm(pUVM);
198	dbgfR3TraceTerm(pVM);
199	dbgfR3InfoTerm(pUVM);
200
201	return VINF_SUCCESS;
202	}
203
204
205	/**
206	* Called when the VM is powered off to detach debuggers.
207	*
208	* @param pVM The cross context VM structure.
209	*/
210	VMMR3_INT_DECL(void) DBGFR3PowerOff(PVM pVM)
211	{
212
213	/*
214	* Send a termination event to any attached debugger.
215	*/
216	/* wait to become the speaker (we should already be that). */
217	if ( pVM->dbgf.s.fAttached
218	&& RTSemPingShouldWait(&pVM->dbgf.s.PingPong))
219	RTSemPingWait(&pVM->dbgf.s.PingPong, 5000);
220
221	if (pVM->dbgf.s.fAttached)
222	{
223	/* Just mark it as detached if we're not in a position to send a power
224	off event. It should fail later on. */
225	if (!RTSemPingIsSpeaker(&pVM->dbgf.s.PingPong))
226	{
227	ASMAtomicWriteBool(&pVM->dbgf.s.fAttached, false);
228	if (RTSemPingIsSpeaker(&pVM->dbgf.s.PingPong))
229	ASMAtomicWriteBool(&pVM->dbgf.s.fAttached, true);
230	}
231
232	if (RTSemPingIsSpeaker(&pVM->dbgf.s.PingPong))
233	{
234	/* Try send the power off event. */
235	int rc;
236	DBGFCMD enmCmd = dbgfR3SetCmd(pVM, DBGFCMD_NO_COMMAND);
237	if (enmCmd == DBGFCMD_DETACH_DEBUGGER)
238	/* the debugger beat us to initiating the detaching. */
239	rc = VINF_SUCCESS;
240	else
241	{
242	/* ignore the command (if any). */
243	enmCmd = DBGFCMD_NO_COMMAND;
244	pVM->dbgf.s.DbgEvent.enmType = DBGFEVENT_POWERING_OFF;
245	pVM->dbgf.s.DbgEvent.enmCtx = DBGFEVENTCTX_OTHER;
246	rc = RTSemPing(&pVM->dbgf.s.PingPong);
247	}
248
249	/*
250	* Process commands and priority requests until we get a command
251	* indicating that the debugger has detached.
252	*/
253	uint32_t cPollHack = 1;
254	PVMCPU pVCpu = VMMGetCpu(pVM);
255	while (RT_SUCCESS(rc))
256	{
257	if (enmCmd != DBGFCMD_NO_COMMAND)
258	{
259	/* process command */
260	bool fResumeExecution;
261	DBGFCMDDATA CmdData = pVM->dbgf.s.VMMCmdData;
262	rc = dbgfR3VMMCmd(pVM, enmCmd, &CmdData, &fResumeExecution);
263	if (enmCmd == DBGFCMD_DETACHED_DEBUGGER)
264	break;
265	enmCmd = DBGFCMD_NO_COMMAND;
266	}
267	else
268	{
269	/* Wait for new command, processing pending priority requests
270	first. The request processing is a bit crazy, but
271	unfortunately required by plugin unloading. */
272	if ( VM_FF_IS_PENDING(pVM, VM_FF_REQUEST)
273	\|\| VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_REQUEST))
274	{
275	LogFlow(("DBGFR3PowerOff: Processes priority requests...\n"));
276	rc = VMR3ReqProcessU(pVM->pUVM, VMCPUID_ANY, true /fPriorityOnly/);
277	if (rc == VINF_SUCCESS)
278	rc = VMR3ReqProcessU(pVM->pUVM, pVCpu->idCpu, true /fPriorityOnly/);
279	LogFlow(("DBGFR3PowerOff: VMR3ReqProcess -> %Rrc\n", rc));
280	cPollHack = 1;
281	}
282	else if (cPollHack < 120)
283	cPollHack++;
284
285	rc = RTSemPingWait(&pVM->dbgf.s.PingPong, cPollHack);
286	if (RT_SUCCESS(rc))
287	enmCmd = dbgfR3SetCmd(pVM, DBGFCMD_NO_COMMAND);
288	else if (rc == VERR_TIMEOUT)
289	rc = VINF_SUCCESS;
290	}
291	}
292
293	/*
294	* Clear the FF so we won't get confused later on.
295	*/
296	VM_FF_CLEAR(pVM, VM_FF_DBGF);
297	}
298	}
299	}
300
301
302	/**
303	* Applies relocations to data and code managed by this
304	* component. This function will be called at init and
305	* whenever the VMM need to relocate it self inside the GC.
306	*
307	* @param pVM The cross context VM structure.
308	* @param offDelta Relocation delta relative to old location.
309	*/
310	VMMR3_INT_DECL(void) DBGFR3Relocate(PVM pVM, RTGCINTPTR offDelta)
311	{
312	dbgfR3TraceRelocate(pVM);
313	dbgfR3AsRelocate(pVM->pUVM, offDelta);
314	}
315
316
317	/**
318	* Waits a little while for a debuggger to attach.
319	*
320	* @returns True is a debugger have attached.
321	* @param pVM The cross context VM structure.
322	* @param enmEvent Event.
323	*/
324	bool dbgfR3WaitForAttach(PVM pVM, DBGFEVENTTYPE enmEvent)
325	{
326	/*
327	* First a message.
328	*/
329	#ifndef RT_OS_L4
330
331	# if !defined(DEBUG) \|\| defined(DEBUG_sandervl) \|\| defined(DEBUG_frank) \|\| defined(IEM_VERIFICATION_MODE)
332	int cWait = 10;
333	# else
334	int cWait = HMIsEnabled(pVM)
335	&& ( enmEvent == DBGFEVENT_ASSERTION_HYPER
336	\|\| enmEvent == DBGFEVENT_FATAL_ERROR)
337	&& !RTEnvExist("VBOX_DBGF_WAIT_FOR_ATTACH")
338	? 10
339	: 150;
340	# endif
341	RTStrmPrintf(g_pStdErr, "DBGF: No debugger attached, waiting %d second%s for one to attach (event=%d)\n",
342	cWait / 10, cWait != 10 ? "s" : "", enmEvent);
343	RTStrmFlush(g_pStdErr);
344	while (cWait > 0)
345	{
346	RTThreadSleep(100);
347	if (pVM->dbgf.s.fAttached)
348	{
349	RTStrmPrintf(g_pStdErr, "Attached!\n");
350	RTStrmFlush(g_pStdErr);
351	return true;
352	}
353
354	/* next */
355	if (!(cWait % 10))
356	{
357	RTStrmPrintf(g_pStdErr, "%d.", cWait / 10);
358	RTStrmFlush(g_pStdErr);
359	}
360	cWait--;
361	}
362	#endif
363
364	RTStrmPrintf(g_pStdErr, "Stopping the VM!\n");
365	RTStrmFlush(g_pStdErr);
366	return false;
367	}
368
369
370	/**
371	* Forced action callback.
372	* The VMM will call this from it's main loop when VM_FF_DBGF is set.
373	*
374	* The function checks and executes pending commands from the debugger.
375	*
376	* @returns VINF_SUCCESS normally.
377	* @returns VERR_DBGF_RAISE_FATAL_ERROR to pretend a fatal error happened.
378	* @param pVM The cross context VM structure.
379	*/
380	VMMR3_INT_DECL(int) DBGFR3VMMForcedAction(PVM pVM)
381	{
382	int rc = VINF_SUCCESS;
383
384	if (VM_FF_TEST_AND_CLEAR(pVM, VM_FF_DBGF))
385	{
386	PVMCPU pVCpu = VMMGetCpu(pVM);
387
388	/*
389	* Command pending? Process it.
390	*/
391	if (pVM->dbgf.s.enmVMMCmd != DBGFCMD_NO_COMMAND)
392	{
393	bool fResumeExecution;
394	DBGFCMDDATA CmdData = pVM->dbgf.s.VMMCmdData;
395	DBGFCMD enmCmd = dbgfR3SetCmd(pVM, DBGFCMD_NO_COMMAND);
396	rc = dbgfR3VMMCmd(pVM, enmCmd, &CmdData, &fResumeExecution);
397	if (!fResumeExecution)
398	rc = dbgfR3VMMWait(pVM);
399	}
400	}
401	return rc;
402	}
403
404
405	/**
406	* Flag whether the event implies that we're stopped in the hypervisor code
407	* and have to block certain operations.
408	*
409	* @param pVM The cross context VM structure.
410	* @param enmEvent The event.
411	*/
412	static void dbgfR3EventSetStoppedInHyperFlag(PVM pVM, DBGFEVENTTYPE enmEvent)
413	{
414	switch (enmEvent)
415	{
416	case DBGFEVENT_STEPPED_HYPER:
417	case DBGFEVENT_ASSERTION_HYPER:
418	case DBGFEVENT_BREAKPOINT_HYPER:
419	pVM->dbgf.s.fStoppedInHyper = true;
420	break;
421	default:
422	pVM->dbgf.s.fStoppedInHyper = false;
423	break;
424	}
425	}
426
427
428	/**
429	* Try to determine the event context.
430	*
431	* @returns debug event context.
432	* @param pVM The cross context VM structure.
433	*/
434	static DBGFEVENTCTX dbgfR3FigureEventCtx(PVM pVM)
435	{
436	/** @todo SMP support! */
437	PVMCPU pVCpu = &pVM->aCpus[0];
438
439	switch (EMGetState(pVCpu))
440	{
441	case EMSTATE_RAW:
442	case EMSTATE_DEBUG_GUEST_RAW:
443	return DBGFEVENTCTX_RAW;
444
445	case EMSTATE_REM:
446	case EMSTATE_DEBUG_GUEST_REM:
447	return DBGFEVENTCTX_REM;
448
449	case EMSTATE_DEBUG_HYPER:
450	case EMSTATE_GURU_MEDITATION:
451	return DBGFEVENTCTX_HYPER;
452
453	default:
454	return DBGFEVENTCTX_OTHER;
455	}
456	}
457
458	/**
459	* The common event prologue code.
460	* It will set the 'stopped-in-hyper' flag, make sure someone is attached,
461	* and perhaps process any high priority pending actions (none yet).
462	*
463	* @returns VBox status code.
464	* @param pVM The cross context VM structure.
465	* @param enmEvent The event to be sent.
466	*/
467	static int dbgfR3EventPrologue(PVM pVM, DBGFEVENTTYPE enmEvent)
468	{
469	/** @todo SMP */
470	PVMCPU pVCpu = VMMGetCpu(pVM);
471
472	/*
473	* Check if a debugger is attached.
474	*/
475	if ( !pVM->dbgf.s.fAttached
476	&& !dbgfR3WaitForAttach(pVM, enmEvent))
477	{
478	Log(("DBGFR3VMMEventSrc: enmEvent=%d - debugger not attached\n", enmEvent));
479	return VERR_DBGF_NOT_ATTACHED;
480	}
481
482	/*
483	* Sync back the state from the REM.
484	*/
485	dbgfR3EventSetStoppedInHyperFlag(pVM, enmEvent);
486	#ifdef VBOX_WITH_REM
487	if (!pVM->dbgf.s.fStoppedInHyper)
488	REMR3StateUpdate(pVM, pVCpu);
489	#endif
490
491	/*
492	* Look thru pending commands and finish those which make sense now.
493	*/
494	/** @todo Process/purge pending commands. */
495	//int rc = DBGFR3VMMForcedAction(pVM);
496	return VINF_SUCCESS;
497	}
498
499
500	/**
501	* Sends the event in the event buffer.
502	*
503	* @returns VBox status code.
504	* @param pVM The cross context VM structure.
505	*/
506	static int dbgfR3SendEvent(PVM pVM)
507	{
508	int rc = RTSemPing(&pVM->dbgf.s.PingPong);
509	if (RT_SUCCESS(rc))
510	rc = dbgfR3VMMWait(pVM);
511
512	pVM->dbgf.s.fStoppedInHyper = false;
513	/** @todo sync VMM -> REM after exitting the debugger. everything may change while in the debugger! */
514	return rc;
515	}
516
517
518	/**
519	* Send a generic debugger event which takes no data.
520	*
521	* @returns VBox status code.
522	* @param pVM The cross context VM structure.
523	* @param enmEvent The event to send.
524	* @internal
525	*/
526	VMMR3DECL(int) DBGFR3Event(PVM pVM, DBGFEVENTTYPE enmEvent)
527	{
528	int rc = dbgfR3EventPrologue(pVM, enmEvent);
529	if (RT_FAILURE(rc))
530	return rc;
531
532	/*
533	* Send the event and process the reply communication.
534	*/
535	pVM->dbgf.s.DbgEvent.enmType = enmEvent;
536	pVM->dbgf.s.DbgEvent.enmCtx = dbgfR3FigureEventCtx(pVM);
537	return dbgfR3SendEvent(pVM);
538	}
539
540
541	/**
542	* Send a debugger event which takes the full source file location.
543	*
544	* @returns VBox status code.
545	* @param pVM The cross context VM structure.
546	* @param enmEvent The event to send.
547	* @param pszFile Source file.
548	* @param uLine Line number in source file.
549	* @param pszFunction Function name.
550	* @param pszFormat Message which accompanies the event.
551	* @param ... Message arguments.
552	* @internal
553	*/
554	VMMR3DECL(int) DBGFR3EventSrc(PVM pVM, DBGFEVENTTYPE enmEvent, const char pszFile, unsigned uLine, const char pszFunction, const char *pszFormat, ...)
555	{
556	va_list args;
557	va_start(args, pszFormat);
558	int rc = DBGFR3EventSrcV(pVM, enmEvent, pszFile, uLine, pszFunction, pszFormat, args);
559	va_end(args);
560	return rc;
561	}
562
563
564	/**
565	* Send a debugger event which takes the full source file location.
566	*
567	* @returns VBox status code.
568	* @param pVM The cross context VM structure.
569	* @param enmEvent The event to send.
570	* @param pszFile Source file.
571	* @param uLine Line number in source file.
572	* @param pszFunction Function name.
573	* @param pszFormat Message which accompanies the event.
574	* @param args Message arguments.
575	* @internal
576	*/
577	VMMR3DECL(int) DBGFR3EventSrcV(PVM pVM, DBGFEVENTTYPE enmEvent, const char pszFile, unsigned uLine, const char pszFunction, const char *pszFormat, va_list args)
578	{
579	int rc = dbgfR3EventPrologue(pVM, enmEvent);
580	if (RT_FAILURE(rc))
581	return rc;
582
583	/*
584	* Format the message.
585	*/
586	char *pszMessage = NULL;
587	char szMessage[8192];
588	if (pszFormat && *pszFormat)
589	{
590	pszMessage = &szMessage[0];
591	RTStrPrintfV(szMessage, sizeof(szMessage), pszFormat, args);
592	}
593
594	/*
595	* Send the event and process the reply communication.
596	*/
597	pVM->dbgf.s.DbgEvent.enmType = enmEvent;
598	pVM->dbgf.s.DbgEvent.enmCtx = dbgfR3FigureEventCtx(pVM);
599	pVM->dbgf.s.DbgEvent.u.Src.pszFile = pszFile;
600	pVM->dbgf.s.DbgEvent.u.Src.uLine = uLine;
601	pVM->dbgf.s.DbgEvent.u.Src.pszFunction = pszFunction;
602	pVM->dbgf.s.DbgEvent.u.Src.pszMessage = pszMessage;
603	return dbgfR3SendEvent(pVM);
604	}
605
606
607	/**
608	* Send a debugger event which takes the two assertion messages.
609	*
610	* @returns VBox status code.
611	* @param pVM The cross context VM structure.
612	* @param enmEvent The event to send.
613	* @param pszMsg1 First assertion message.
614	* @param pszMsg2 Second assertion message.
615	*/
616	VMMR3_INT_DECL(int) DBGFR3EventAssertion(PVM pVM, DBGFEVENTTYPE enmEvent, const char pszMsg1, const char pszMsg2)
617	{
618	int rc = dbgfR3EventPrologue(pVM, enmEvent);
619	if (RT_FAILURE(rc))
620	return rc;
621
622	/*
623	* Send the event and process the reply communication.
624	*/
625	pVM->dbgf.s.DbgEvent.enmType = enmEvent;
626	pVM->dbgf.s.DbgEvent.enmCtx = dbgfR3FigureEventCtx(pVM);
627	pVM->dbgf.s.DbgEvent.u.Assert.pszMsg1 = pszMsg1;
628	pVM->dbgf.s.DbgEvent.u.Assert.pszMsg2 = pszMsg2;
629	return dbgfR3SendEvent(pVM);
630	}
631
632
633	/**
634	* Breakpoint was hit somewhere.
635	* Figure out which breakpoint it is and notify the debugger.
636	*
637	* @returns VBox status code.
638	* @param pVM The cross context VM structure.
639	* @param enmEvent DBGFEVENT_BREAKPOINT_HYPER or DBGFEVENT_BREAKPOINT.
640	*/
641	VMMR3_INT_DECL(int) DBGFR3EventBreakpoint(PVM pVM, DBGFEVENTTYPE enmEvent)
642	{
643	int rc = dbgfR3EventPrologue(pVM, enmEvent);
644	if (RT_FAILURE(rc))
645	return rc;
646
647	/*
648	* Send the event and process the reply communication.
649	*/
650	/** @todo SMP */
651	PVMCPU pVCpu = VMMGetCpu0(pVM);
652
653	pVM->dbgf.s.DbgEvent.enmType = enmEvent;
654	RTUINT iBp = pVM->dbgf.s.DbgEvent.u.Bp.iBp = pVCpu->dbgf.s.iActiveBp;
655	pVCpu->dbgf.s.iActiveBp = ~0U;
656	if (iBp != ~0U)
657	pVM->dbgf.s.DbgEvent.enmCtx = DBGFEVENTCTX_RAW;
658	else
659	{
660	/* REM breakpoints has be been searched for. */
661	#if 0 /** @todo get flat PC api! */
662	uint32_t eip = CPUMGetGuestEIP(pVM);
663	#else
664	/* @todo SMP support!! */
665	PCPUMCTX pCtx = CPUMQueryGuestCtxPtr(VMMGetCpu(pVM));
666	RTGCPTR eip = pCtx->rip + pCtx->cs.u64Base;
667	#endif
668	for (size_t i = 0; i < RT_ELEMENTS(pVM->dbgf.s.aBreakpoints); i++)
669	if ( pVM->dbgf.s.aBreakpoints[i].enmType == DBGFBPTYPE_REM
670	&& pVM->dbgf.s.aBreakpoints[i].GCPtr == eip)
671	{
672	pVM->dbgf.s.DbgEvent.u.Bp.iBp = pVM->dbgf.s.aBreakpoints[i].iBp;
673	break;
674	}
675	AssertMsg(pVM->dbgf.s.DbgEvent.u.Bp.iBp != ~0U, ("eip=%08x\n", eip));
676	pVM->dbgf.s.DbgEvent.enmCtx = DBGFEVENTCTX_REM;
677	}
678	return dbgfR3SendEvent(pVM);
679	}
680
681
682	/**
683	* Waits for the debugger to respond.
684	*
685	* @returns VBox status code. (clearify)
686	* @param pVM The cross context VM structure.
687	*/
688	static int dbgfR3VMMWait(PVM pVM)
689	{
690	PVMCPU pVCpu = VMMGetCpu(pVM);
691
692	LogFlow(("dbgfR3VMMWait:\n"));
693	int rcRet = VINF_SUCCESS;
694
695	/*
696	* Waits for the debugger to reply (i.e. issue an command).
697	*/
698	for (;;)
699	{
700	/*
701	* Wait.
702	*/
703	uint32_t cPollHack = 1; /** @todo this interface is horrible now that we're using lots of VMR3ReqCall stuff all over DBGF. */
704	for (;;)
705	{
706	int rc;
707	if ( !VM_FF_IS_PENDING(pVM, VM_FF_EMT_RENDEZVOUS \| VM_FF_REQUEST)
708	&& !VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_REQUEST))
709	{
710	rc = RTSemPingWait(&pVM->dbgf.s.PingPong, cPollHack);
711	if (RT_SUCCESS(rc))
712	break;
713	if (rc != VERR_TIMEOUT)
714	{
715	LogFlow(("dbgfR3VMMWait: returns %Rrc\n", rc));
716	return rc;
717	}
718	}
719
720	if (VM_FF_IS_PENDING(pVM, VM_FF_EMT_RENDEZVOUS))
721	{
722	rc = VMMR3EmtRendezvousFF(pVM, pVCpu);
723	cPollHack = 1;
724	}
725	else if ( VM_FF_IS_PENDING(pVM, VM_FF_REQUEST)
726	\|\| VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_REQUEST))
727	{
728	LogFlow(("dbgfR3VMMWait: Processes requests...\n"));
729	rc = VMR3ReqProcessU(pVM->pUVM, VMCPUID_ANY, false /fPriorityOnly/);
730	if (rc == VINF_SUCCESS)
731	rc = VMR3ReqProcessU(pVM->pUVM, pVCpu->idCpu, false /fPriorityOnly/);
732	LogFlow(("dbgfR3VMMWait: VMR3ReqProcess -> %Rrc rcRet=%Rrc\n", rc, rcRet));
733	cPollHack = 1;
734	}
735	else
736	{
737	rc = VINF_SUCCESS;
738	if (cPollHack < 120)
739	cPollHack++;
740	}
741
742	if (rc >= VINF_EM_FIRST && rc <= VINF_EM_LAST)
743	{
744	switch (rc)
745	{
746	case VINF_EM_DBG_BREAKPOINT:
747	case VINF_EM_DBG_STEPPED:
748	case VINF_EM_DBG_STEP:
749	case VINF_EM_DBG_STOP:
750	AssertMsgFailed(("rc=%Rrc\n", rc));
751	break;
752
753	/* return straight away */
754	case VINF_EM_TERMINATE:
755	case VINF_EM_OFF:
756	LogFlow(("dbgfR3VMMWait: returns %Rrc\n", rc));
757	return rc;
758
759	/* remember return code. */
760	default:
761	AssertReleaseMsgFailed(("rc=%Rrc is not in the switch!\n", rc));
762	case VINF_EM_RESET:
763	case VINF_EM_SUSPEND:
764	case VINF_EM_HALT:
765	case VINF_EM_RESUME:
766	case VINF_EM_RESCHEDULE:
767	case VINF_EM_RESCHEDULE_REM:
768	case VINF_EM_RESCHEDULE_RAW:
769	if (rc < rcRet \|\| rcRet == VINF_SUCCESS)
770	rcRet = rc;
771	break;
772	}
773	}
774	else if (RT_FAILURE(rc))
775	{
776	LogFlow(("dbgfR3VMMWait: returns %Rrc\n", rc));
777	return rc;
778	}
779	}
780
781	/*
782	* Process the command.
783	*/
784	bool fResumeExecution;
785	DBGFCMDDATA CmdData = pVM->dbgf.s.VMMCmdData;
786	DBGFCMD enmCmd = dbgfR3SetCmd(pVM, DBGFCMD_NO_COMMAND);
787	int rc = dbgfR3VMMCmd(pVM, enmCmd, &CmdData, &fResumeExecution);
788	if (fResumeExecution)
789	{
790	if (RT_FAILURE(rc))
791	rcRet = rc;
792	else if ( rc >= VINF_EM_FIRST
793	&& rc <= VINF_EM_LAST
794	&& (rc < rcRet \|\| rcRet == VINF_SUCCESS))
795	rcRet = rc;
796	LogFlow(("dbgfR3VMMWait: returns %Rrc\n", rcRet));
797	return rcRet;
798	}
799	}
800	}
801
802
803	/**
804	* Executes command from debugger.
805	* The caller is responsible for waiting or resuming execution based on the
806	* value returned in the *pfResumeExecution indicator.
807	*
808	* @returns VBox status code. (clearify!)
809	* @param pVM The cross context VM structure.
810	* @param enmCmd The command in question.
811	* @param pCmdData Pointer to the command data.
812	* @param pfResumeExecution Where to store the resume execution / continue waiting indicator.
813	*/
814	static int dbgfR3VMMCmd(PVM pVM, DBGFCMD enmCmd, PDBGFCMDDATA pCmdData, bool *pfResumeExecution)
815	{
816	bool fSendEvent;
817	bool fResume;
818	int rc = VINF_SUCCESS;
819
820	NOREF(pCmdData); /* for later */
821
822	switch (enmCmd)
823	{
824	/*
825	* Halt is answered by an event say that we've halted.
826	*/
827	case DBGFCMD_HALT:
828	{
829	pVM->dbgf.s.DbgEvent.enmType = DBGFEVENT_HALT_DONE;
830	pVM->dbgf.s.DbgEvent.enmCtx = dbgfR3FigureEventCtx(pVM);
831	fSendEvent = true;
832	fResume = false;
833	break;
834	}
835
836
837	/*
838	* Resume is not answered we'll just resume execution.
839	*/
840	case DBGFCMD_GO:
841	{
842	/** @todo SMP */
843	PVMCPU pVCpu = VMMGetCpu0(pVM);
844	pVCpu->dbgf.s.fSingleSteppingRaw = false;
845	fSendEvent = false;
846	fResume = true;
847	break;
848	}
849
850	/** @todo implement (and define) the rest of the commands. */
851
852	/*
853	* Disable breakpoints and stuff.
854	* Send an everythings cool event to the debugger thread and resume execution.
855	*/
856	case DBGFCMD_DETACH_DEBUGGER:
857	{
858	ASMAtomicWriteBool(&pVM->dbgf.s.fAttached, false);
859	pVM->dbgf.s.DbgEvent.enmType = DBGFEVENT_DETACH_DONE;
860	pVM->dbgf.s.DbgEvent.enmCtx = DBGFEVENTCTX_OTHER;
861	fSendEvent = true;
862	fResume = true;
863	break;
864	}
865
866	/*
867	* The debugger has detached successfully.
868	* There is no reply to this event.
869	*/
870	case DBGFCMD_DETACHED_DEBUGGER:
871	{
872	fSendEvent = false;
873	fResume = true;
874	break;
875	}
876
877	/*
878	* Single step, with trace into.
879	*/
880	case DBGFCMD_SINGLE_STEP:
881	{
882	Log2(("Single step\n"));
883	rc = VINF_EM_DBG_STEP;
884	/** @todo SMP */
885	PVMCPU pVCpu = VMMGetCpu0(pVM);
886	pVCpu->dbgf.s.fSingleSteppingRaw = true;
887	fSendEvent = false;
888	fResume = true;
889	break;
890	}
891
892	/*
893	* Default is to send an invalid command event.
894	*/
895	default:
896	{
897	pVM->dbgf.s.DbgEvent.enmType = DBGFEVENT_INVALID_COMMAND;
898	pVM->dbgf.s.DbgEvent.enmCtx = dbgfR3FigureEventCtx(pVM);
899	fSendEvent = true;
900	fResume = false;
901	break;
902	}
903	}
904
905	/*
906	* Send pending event.
907	*/
908	if (fSendEvent)
909	{
910	Log2(("DBGF: Emulation thread: sending event %d\n", pVM->dbgf.s.DbgEvent.enmType));
911	int rc2 = RTSemPing(&pVM->dbgf.s.PingPong);
912	if (RT_FAILURE(rc2))
913	{
914	AssertRC(rc2);
915	*pfResumeExecution = true;
916	return rc2;
917	}
918	}
919
920	/*
921	* Return.
922	*/
923	*pfResumeExecution = fResume;
924	return rc;
925	}
926
927
928	/**
929	* Attaches a debugger to the specified VM.
930	*
931	* Only one debugger at a time.
932	*
933	* @returns VBox status code.
934	* @param pUVM The user mode VM handle.
935	*/
936	VMMR3DECL(int) DBGFR3Attach(PUVM pUVM)
937	{
938	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
939	PVM pVM = pUVM->pVM;
940	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
941
942	/*
943	* Call the VM, use EMT for serialization.
944	*/
945	/** @todo SMP */
946	return VMR3ReqCallWait(pVM, VMCPUID_ANY, (PFNRT)dbgfR3Attach, 1, pVM);
947	}
948
949
950	/**
951	* EMT worker for DBGFR3Attach.
952	*
953	* @returns VBox status code.
954	* @param pVM The cross context VM structure.
955	*/
956	static DECLCALLBACK(int) dbgfR3Attach(PVM pVM)
957	{
958	if (pVM->dbgf.s.fAttached)
959	{
960	Log(("dbgR3Attach: Debugger already attached\n"));
961	return VERR_DBGF_ALREADY_ATTACHED;
962	}
963
964	/*
965	* Create the Ping-Pong structure.
966	*/
967	int rc = RTSemPingPongInit(&pVM->dbgf.s.PingPong);
968	AssertRCReturn(rc, rc);
969
970	/*
971	* Set the attached flag.
972	*/
973	ASMAtomicWriteBool(&pVM->dbgf.s.fAttached, true);
974	return VINF_SUCCESS;
975	}
976
977
978	/**
979	* Detaches a debugger from the specified VM.
980	*
981	* Caller must be attached to the VM.
982	*
983	* @returns VBox status code.
984	* @param pUVM The user mode VM handle.
985	*/
986	VMMR3DECL(int) DBGFR3Detach(PUVM pUVM)
987	{
988	LogFlow(("DBGFR3Detach:\n"));
989	int rc;
990
991	/*
992	* Validate input. The UVM handle shall be valid, the VM handle might be
993	* in the processes of being destroyed already, so deal quietly with that.
994	*/
995	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
996	PVM pVM = pUVM->pVM;
997	if (!VM_IS_VALID_EXT(pVM))
998	return VERR_INVALID_VM_HANDLE;
999
1000	/*
1001	* Check if attached.
1002	*/
1003	if (!pVM->dbgf.s.fAttached)
1004	return VERR_DBGF_NOT_ATTACHED;
1005
1006	/*
1007	* Try send the detach command.
1008	* Keep in mind that we might be racing EMT, so, be extra careful.
1009	*/
1010	DBGFCMD enmCmd = dbgfR3SetCmd(pVM, DBGFCMD_DETACH_DEBUGGER);
1011	if (RTSemPongIsSpeaker(&pVM->dbgf.s.PingPong))
1012	{
1013	rc = RTSemPong(&pVM->dbgf.s.PingPong);
1014	AssertMsgRCReturn(rc, ("Failed to signal emulation thread. rc=%Rrc\n", rc), rc);
1015	LogRel(("DBGFR3Detach: enmCmd=%d (pong -> ping)\n", enmCmd));
1016	}
1017
1018	/*
1019	* Wait for the OK event.
1020	*/
1021	rc = RTSemPongWait(&pVM->dbgf.s.PingPong, RT_INDEFINITE_WAIT);
1022	AssertLogRelMsgRCReturn(rc, ("Wait on detach command failed, rc=%Rrc\n", rc), rc);
1023
1024	/*
1025	* Send the notification command indicating that we're really done.
1026	*/
1027	enmCmd = dbgfR3SetCmd(pVM, DBGFCMD_DETACHED_DEBUGGER);
1028	rc = RTSemPong(&pVM->dbgf.s.PingPong);
1029	AssertMsgRCReturn(rc, ("Failed to signal emulation thread. rc=%Rrc\n", rc), rc);
1030
1031	LogFlowFunc(("returns VINF_SUCCESS\n"));
1032	return VINF_SUCCESS;
1033	}
1034
1035
1036	/**
1037	* Wait for a debug event.
1038	*
1039	* @returns VBox status code. Will not return VBOX_INTERRUPTED.
1040	* @param pUVM The user mode VM handle.
1041	* @param cMillies Number of millis to wait.
1042	* @param ppEvent Where to store the event pointer.
1043	*/
1044	VMMR3DECL(int) DBGFR3EventWait(PUVM pUVM, RTMSINTERVAL cMillies, PCDBGFEVENT *ppEvent)
1045	{
1046	/*
1047	* Check state.
1048	*/
1049	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1050	PVM pVM = pUVM->pVM;
1051	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1052	AssertReturn(pVM->dbgf.s.fAttached, VERR_DBGF_NOT_ATTACHED);
1053	*ppEvent = NULL;
1054
1055	/*
1056	* Wait.
1057	*/
1058	int rc = RTSemPongWait(&pVM->dbgf.s.PingPong, cMillies);
1059	if (RT_SUCCESS(rc))
1060	{
1061	*ppEvent = &pVM->dbgf.s.DbgEvent;
1062	Log2(("DBGF: Debugger thread: receiving event %d\n", (*ppEvent)->enmType));
1063	return VINF_SUCCESS;
1064	}
1065
1066	return rc;
1067	}
1068
1069
1070	/**
1071	* Halts VM execution.
1072	*
1073	* After calling this the VM isn't actually halted till an DBGFEVENT_HALT_DONE
1074	* arrives. Until that time it's not possible to issue any new commands.
1075	*
1076	* @returns VBox status code.
1077	* @param pUVM The user mode VM handle.
1078	*/
1079	VMMR3DECL(int) DBGFR3Halt(PUVM pUVM)
1080	{
1081	/*
1082	* Check state.
1083	*/
1084	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1085	PVM pVM = pUVM->pVM;
1086	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1087	AssertReturn(pVM->dbgf.s.fAttached, VERR_DBGF_NOT_ATTACHED);
1088	RTPINGPONGSPEAKER enmSpeaker = pVM->dbgf.s.PingPong.enmSpeaker;
1089	if ( enmSpeaker == RTPINGPONGSPEAKER_PONG
1090	\|\| enmSpeaker == RTPINGPONGSPEAKER_PONG_SIGNALED)
1091	return VWRN_DBGF_ALREADY_HALTED;
1092
1093	/*
1094	* Send command.
1095	*/
1096	dbgfR3SetCmd(pVM, DBGFCMD_HALT);
1097
1098	return VINF_SUCCESS;
1099	}
1100
1101
1102	/**
1103	* Checks if the VM is halted by the debugger.
1104	*
1105	* @returns True if halted.
1106	* @returns False if not halted.
1107	* @param pUVM The user mode VM handle.
1108	*/
1109	VMMR3DECL(bool) DBGFR3IsHalted(PUVM pUVM)
1110	{
1111	UVM_ASSERT_VALID_EXT_RETURN(pUVM, false);
1112	PVM pVM = pUVM->pVM;
1113	VM_ASSERT_VALID_EXT_RETURN(pVM, false);
1114	AssertReturn(pVM->dbgf.s.fAttached, false);
1115
1116	RTPINGPONGSPEAKER enmSpeaker = pVM->dbgf.s.PingPong.enmSpeaker;
1117	return enmSpeaker == RTPINGPONGSPEAKER_PONG_SIGNALED
1118	\|\| enmSpeaker == RTPINGPONGSPEAKER_PONG;
1119	}
1120
1121
1122	/**
1123	* Checks if the debugger can wait for events or not.
1124	*
1125	* This function is only used by lazy, multiplexing debuggers. :-)
1126	*
1127	* @returns VBox status code.
1128	* @retval VINF_SUCCESS if waitable.
1129	* @retval VERR_SEM_OUT_OF_TURN if not waitable.
1130	* @retval VERR_INVALID_VM_HANDLE if the VM is being (/ has been) destroyed
1131	* (not asserted) or if the handle is invalid (asserted).
1132	* @retval VERR_DBGF_NOT_ATTACHED if not attached.
1133	*
1134	* @param pUVM The user mode VM handle.
1135	*/
1136	VMMR3DECL(int) DBGFR3QueryWaitable(PUVM pUVM)
1137	{
1138	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1139
1140	/* Note! There is a slight race here, unfortunately. */
1141	PVM pVM = pUVM->pVM;
1142	if (!RT_VALID_PTR(pVM))
1143	return VERR_INVALID_VM_HANDLE;
1144	if (pVM->enmVMState >= VMSTATE_DESTROYING)
1145	return VERR_INVALID_VM_HANDLE;
1146	if (!pVM->dbgf.s.fAttached)
1147	return VERR_DBGF_NOT_ATTACHED;
1148
1149	if (!RTSemPongShouldWait(&pVM->dbgf.s.PingPong))
1150	return VERR_SEM_OUT_OF_TURN;
1151
1152	return VINF_SUCCESS;
1153	}
1154
1155
1156	/**
1157	* Resumes VM execution.
1158	*
1159	* There is no receipt event on this command.
1160	*
1161	* @returns VBox status code.
1162	* @param pUVM The user mode VM handle.
1163	*/
1164	VMMR3DECL(int) DBGFR3Resume(PUVM pUVM)
1165	{
1166	/*
1167	* Check state.
1168	*/
1169	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1170	PVM pVM = pUVM->pVM;
1171	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1172	AssertReturn(pVM->dbgf.s.fAttached, VERR_DBGF_NOT_ATTACHED);
1173	AssertReturn(RTSemPongIsSpeaker(&pVM->dbgf.s.PingPong), VERR_SEM_OUT_OF_TURN);
1174
1175	/*
1176	* Send the ping back to the emulation thread telling it to run.
1177	*/
1178	dbgfR3SetCmd(pVM, DBGFCMD_GO);
1179	int rc = RTSemPong(&pVM->dbgf.s.PingPong);
1180	AssertRC(rc);
1181
1182	return rc;
1183	}
1184
1185
1186	/**
1187	* Step Into.
1188	*
1189	* A single step event is generated from this command.
1190	* The current implementation is not reliable, so don't rely on the event coming.
1191	*
1192	* @returns VBox status code.
1193	* @param pUVM The user mode VM handle.
1194	* @param idCpu The ID of the CPU to single step on.
1195	*/
1196	VMMR3DECL(int) DBGFR3Step(PUVM pUVM, VMCPUID idCpu)
1197	{
1198	/*
1199	* Check state.
1200	*/
1201	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1202	PVM pVM = pUVM->pVM;
1203	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1204	AssertReturn(pVM->dbgf.s.fAttached, VERR_DBGF_NOT_ATTACHED);
1205	AssertReturn(RTSemPongIsSpeaker(&pVM->dbgf.s.PingPong), VERR_SEM_OUT_OF_TURN);
1206	AssertReturn(idCpu < pVM->cCpus, VERR_INVALID_PARAMETER);
1207
1208	/*
1209	* Send the ping back to the emulation thread telling it to run.
1210	*/
1211	/** @todo SMP (idCpu) */
1212	dbgfR3SetCmd(pVM, DBGFCMD_SINGLE_STEP);
1213	int rc = RTSemPong(&pVM->dbgf.s.PingPong);
1214	AssertRC(rc);
1215	return rc;
1216	}
1217
1218
1219	/**
1220	* Call this to single step programmatically.
1221	*
1222	* You must pass down the return code to the EM loop! That's
1223	* where the actual single stepping take place (at least in the
1224	* current implementation).
1225	*
1226	* @returns VINF_EM_DBG_STEP
1227	*
1228	* @param pVCpu The cross context virtual CPU structure.
1229	*
1230	* @thread VCpu EMT
1231	* @internal
1232	*/
1233	VMMR3_INT_DECL(int) DBGFR3PrgStep(PVMCPU pVCpu)
1234	{
1235	VMCPU_ASSERT_EMT(pVCpu);
1236
1237	pVCpu->dbgf.s.fSingleSteppingRaw = true;
1238	return VINF_EM_DBG_STEP;
1239	}
1240
1241
1242	/**
1243	* Inject an NMI into a running VM (only VCPU 0!)
1244	*
1245	* @returns VBox status code.
1246	* @param pUVM The user mode VM structure.
1247	* @param idCpu The ID of the CPU to inject the NMI on.
1248	*/
1249	VMMR3DECL(int) DBGFR3InjectNMI(PUVM pUVM, VMCPUID idCpu)
1250	{
1251	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1252	PVM pVM = pUVM->pVM;
1253	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1254	AssertReturn(idCpu < pVM->cCpus, VERR_INVALID_CPU_ID);
1255
1256	/** @todo Implement generic NMI injection. */
1257	if (!HMIsEnabled(pVM))
1258	return VERR_NOT_SUP_IN_RAW_MODE;
1259
1260	VMCPU_FF_SET(&pVM->aCpus[idCpu], VMCPU_FF_INTERRUPT_NMI);
1261	return VINF_SUCCESS;
1262	}
1263

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source: vbox/trunk/src/VBox/VMM/VMMR3/DBGF.cpp@ 58170

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