DBGF.cpp@ 97231

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1	/* $Id: DBGF.cpp 96407 2022-08-22 17:43:14Z vboxsync $ */
2	/** @file
3	* DBGF - Debugger Facility.
4	*/
5
6	/*
7	* Copyright (C) 2006-2022 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28
29	/** @page pg_dbgf DBGF - The Debugger Facility
30	*
31	* The purpose of the DBGF is to provide an interface for debuggers to
32	* manipulate the VMM without having to mess up the source code for each of
33	* them. The DBGF is always built in and will always work when a debugger
34	* attaches to the VM. The DBGF provides the basic debugger features, such as
35	* halting execution, handling breakpoints, single step execution, instruction
36	* disassembly, info querying, OS specific diggers, symbol and module
37	* management.
38	*
39	* The interface is working in a manner similar to the win32, linux and os2
40	* debugger interfaces. The interface has an asynchronous nature. This comes
41	* from the fact that the VMM and the Debugger are running in different threads.
42	* They are referred to as the "emulation thread" and the "debugger thread", or
43	* as the "ping thread" and the "pong thread, respectivly. (The last set of
44	* names comes from the use of the Ping-Pong synchronization construct from the
45	* RTSem API.)
46	*
47	* @see grp_dbgf
48	*
49	*
50	* @section sec_dbgf_scenario Usage Scenario
51	*
52	* The debugger starts by attaching to the VM. For practical reasons we limit the
53	* number of concurrently attached debuggers to 1 per VM. The action of
54	* attaching to the VM causes the VM to check and generate debug events.
55	*
56	* The debugger then will wait/poll for debug events and issue commands.
57	*
58	* The waiting and polling is done by the DBGFEventWait() function. It will wait
59	* for the emulation thread to send a ping, thus indicating that there is an
60	* event waiting to be processed.
61	*
62	* An event can be a response to a command issued previously, the hitting of a
63	* breakpoint, or running into a bad/fatal VMM condition. The debugger now has
64	* the ping and must respond to the event at hand - the VMM is waiting. This
65	* usually means that the user of the debugger must do something, but it doesn't
66	* have to. The debugger is free to call any DBGF function (nearly at least)
67	* while processing the event.
68	*
69	* Typically the user will issue a request for the execution to be resumed, so
70	* the debugger calls DBGFResume() and goes back to waiting/polling for events.
71	*
72	* When the user eventually terminates the debugging session or selects another
73	* VM, the debugger detaches from the VM. This means that breakpoints are
74	* disabled and that the emulation thread no longer polls for debugger commands.
75	*
76	*/
77
78
79	/*********************************************************************************************************************************
80	* Header Files *
81	*********************************************************************************************************************************/
82	#define LOG_GROUP LOG_GROUP_DBGF
83	#include <VBox/vmm/dbgf.h>
84	#include <VBox/vmm/selm.h>
85	#include <VBox/vmm/em.h>
86	#include <VBox/vmm/hm.h>
87	#include <VBox/vmm/mm.h>
88	#include <VBox/vmm/nem.h>
89	#include "DBGFInternal.h"
90	#include <VBox/vmm/vm.h>
91	#include <VBox/vmm/uvm.h>
92	#include <VBox/err.h>
93
94	#include <VBox/log.h>
95	#include <iprt/semaphore.h>
96	#include <iprt/thread.h>
97	#include <iprt/asm.h>
98	#include <iprt/time.h>
99	#include <iprt/assert.h>
100	#include <iprt/stream.h>
101	#include <iprt/env.h>
102
103
104	/*********************************************************************************************************************************
105	* Structures and Typedefs *
106	*********************************************************************************************************************************/
107	/**
108	* Instruction type returned by dbgfStepGetCurInstrType.
109	*/
110	typedef enum DBGFSTEPINSTRTYPE
111	{
112	DBGFSTEPINSTRTYPE_INVALID = 0,
113	DBGFSTEPINSTRTYPE_OTHER,
114	DBGFSTEPINSTRTYPE_RET,
115	DBGFSTEPINSTRTYPE_CALL,
116	DBGFSTEPINSTRTYPE_END,
117	DBGFSTEPINSTRTYPE_32BIT_HACK = 0x7fffffff
118	} DBGFSTEPINSTRTYPE;
119
120
121	/*********************************************************************************************************************************
122	* Internal Functions *
123	*********************************************************************************************************************************/
124	DECLINLINE(int) dbgfR3SendEventWait(PVM pVM, PVMCPU pVCpu, DBGFEVENTTYPE enmType, DBGFEVENTCTX enmCtx);
125	DECLINLINE(DBGFCMD) dbgfR3CpuGetCmd(PUVMCPU pUVCpu);
126	static int dbgfR3CpuWait(PVMCPU pVCpu);
127	static int dbgfR3CpuCmd(PVMCPU pVCpu, DBGFCMD enmCmd, PDBGFCMDDATA pCmdData, bool *pfResumeExecution);
128	static DBGFSTEPINSTRTYPE dbgfStepGetCurInstrType(PVM pVM, PVMCPU pVCpu);
129	static bool dbgfStepAreWeThereYet(PVM pVM, PVMCPU pVCpu);
130	static int dbgfR3EventHaltAllVCpus(PVM pVM, PVMCPU pVCpuExclude);
131
132
133
134	/**
135	* Initializes the DBGF.
136	*
137	* @returns VBox status code.
138	* @param pVM The cross context VM structure.
139	*/
140	VMMR3_INT_DECL(int) DBGFR3Init(PVM pVM)
141	{
142	PUVM pUVM = pVM->pUVM;
143	AssertCompile(sizeof(pUVM->dbgf.s) <= sizeof(pUVM->dbgf.padding));
144	AssertCompile(sizeof(pUVM->aCpus[0].dbgf.s) <= sizeof(pUVM->aCpus[0].dbgf.padding));
145
146	pVM->dbgf.s.SteppingFilter.idCpu = NIL_VMCPUID;
147
148	/*
149	* The usual sideways mountain climbing style of init:
150	*/
151	int rc = dbgfR3InfoInit(pUVM); /* (First, initalizes the shared critical section.) */
152	if (RT_SUCCESS(rc))
153	{
154	rc = dbgfR3TraceInit(pVM);
155	if (RT_SUCCESS(rc))
156	{
157	rc = dbgfR3RegInit(pUVM);
158	if (RT_SUCCESS(rc))
159	{
160	rc = dbgfR3AsInit(pUVM);
161	if (RT_SUCCESS(rc))
162	{
163	rc = dbgfR3BpInit(pUVM);
164	if (RT_SUCCESS(rc))
165	{
166	rc = dbgfR3OSInit(pUVM);
167	if (RT_SUCCESS(rc))
168	{
169	rc = dbgfR3PlugInInit(pUVM);
170	if (RT_SUCCESS(rc))
171	{
172	rc = dbgfR3BugCheckInit(pVM);
173	if (RT_SUCCESS(rc))
174	{
175	#ifdef VBOX_WITH_DBGF_TRACING
176	rc = dbgfR3TracerInit(pVM);
177	#endif
178	if (RT_SUCCESS(rc))
179	{
180	return VINF_SUCCESS;
181	}
182	}
183	dbgfR3PlugInTerm(pUVM);
184	}
185	dbgfR3OSTermPart1(pUVM);
186	dbgfR3OSTermPart2(pUVM);
187	}
188	dbgfR3BpTerm(pUVM);
189	}
190	dbgfR3AsTerm(pUVM);
191	}
192	dbgfR3RegTerm(pUVM);
193	}
194	dbgfR3TraceTerm(pVM);
195	}
196	dbgfR3InfoTerm(pUVM);
197	}
198	return rc;
199	}
200
201
202	/**
203	* Terminates and cleans up resources allocated by the DBGF.
204	*
205	* @returns VBox status code.
206	* @param pVM The cross context VM structure.
207	*/
208	VMMR3_INT_DECL(int) DBGFR3Term(PVM pVM)
209	{
210	PUVM pUVM = pVM->pUVM;
211
212	#ifdef VBOX_WITH_DBGF_TRACING
213	dbgfR3TracerTerm(pVM);
214	#endif
215	dbgfR3OSTermPart1(pUVM);
216	dbgfR3PlugInTerm(pUVM);
217	dbgfR3OSTermPart2(pUVM);
218	dbgfR3BpTerm(pUVM);
219	dbgfR3AsTerm(pUVM);
220	dbgfR3RegTerm(pUVM);
221	dbgfR3TraceTerm(pVM);
222	dbgfR3InfoTerm(pUVM);
223
224	return VINF_SUCCESS;
225	}
226
227
228	/**
229	* This is for tstCFGM and others to avoid trigger leak detection.
230	*
231	* @returns VBox status code.
232	* @param pUVM The user mode VM structure.
233	*/
234	VMMR3DECL(void) DBGFR3TermUVM(PUVM pUVM)
235	{
236	dbgfR3InfoTerm(pUVM);
237	}
238
239
240	/**
241	* Called when the VM is powered off to detach debuggers.
242	*
243	* @param pVM The cross context VM structure.
244	*/
245	VMMR3_INT_DECL(void) DBGFR3PowerOff(PVM pVM)
246	{
247	/*
248	* Send a termination event to any attached debugger.
249	*/
250	if (pVM->dbgf.s.fAttached)
251	{
252	PVMCPU pVCpu = VMMGetCpu(pVM);
253	int rc = dbgfR3SendEventWait(pVM, pVCpu, DBGFEVENT_POWERING_OFF, DBGFEVENTCTX_OTHER);
254	AssertLogRelRC(rc);
255
256	/*
257	* Clear the FF so we won't get confused later on.
258	*/
259	VM_FF_CLEAR(pVM, VM_FF_DBGF);
260	}
261	}
262
263
264	/**
265	* Applies relocations to data and code managed by this
266	* component. This function will be called at init and
267	* whenever the VMM need to relocate it self inside the GC.
268	*
269	* @param pVM The cross context VM structure.
270	* @param offDelta Relocation delta relative to old location.
271	*/
272	VMMR3_INT_DECL(void) DBGFR3Relocate(PVM pVM, RTGCINTPTR offDelta)
273	{
274	dbgfR3TraceRelocate(pVM);
275	dbgfR3AsRelocate(pVM->pUVM, offDelta);
276	}
277
278
279	/**
280	* Waits a little while for a debuggger to attach.
281	*
282	* @returns True is a debugger have attached.
283	* @param pVM The cross context VM structure.
284	* @param pVCpu The cross context per CPU structure.
285	* @param enmEvent Event.
286	*
287	* @thread EMT(pVCpu)
288	*/
289	bool dbgfR3WaitForAttach(PVM pVM, PVMCPU pVCpu, DBGFEVENTTYPE enmEvent)
290	{
291	/*
292	* First a message.
293	*/
294	#if !defined(DEBUG)
295	int cWait = 10;
296	#else
297	int cWait = RTEnvExist("VBOX_DBGF_NO_WAIT_FOR_ATTACH")
298	\|\| ( ( enmEvent == DBGFEVENT_ASSERTION_HYPER
299	\|\| enmEvent == DBGFEVENT_FATAL_ERROR)
300	&& !RTEnvExist("VBOX_DBGF_WAIT_FOR_ATTACH"))
301	? 10
302	: 150;
303	#endif
304	RTStrmPrintf(g_pStdErr,
305	"DBGF: No debugger attached, waiting %d second%s for one to attach (event=%d)\n"
306	#ifdef DEBUG
307	" Set VBOX_DBGF_NO_WAIT_FOR_ATTACH=1 for short wait or VBOX_DBGF_WAIT_FOR_ATTACH=1 longer.\n"
308	#endif
309	,
310	cWait / 10, cWait != 10 ? "s" : "", enmEvent);
311	RTStrmFlush(g_pStdErr);
312	while (cWait > 0)
313	{
314	RTThreadSleep(100);
315	if (pVM->dbgf.s.fAttached)
316	{
317	RTStrmPrintf(g_pStdErr, "Attached!\n");
318	RTStrmFlush(g_pStdErr);
319	return true;
320	}
321
322	/* Process rendezvous (debugger attaching involves such). */
323	if (VM_FF_IS_SET(pVM, VM_FF_EMT_RENDEZVOUS))
324	{
325	int rc = VMMR3EmtRendezvousFF(pVM, pVCpu); AssertRC(rc);
326	if (rc != VINF_SUCCESS)
327	{
328	/** @todo Ignoring these could be bad. */
329	RTStrmPrintf(g_pStdErr, "[rcRendezvous=%Rrc, ignored!]", rc);
330	RTStrmFlush(g_pStdErr);
331	}
332	}
333
334	/* Process priority stuff. */
335	if ( VM_FF_IS_SET(pVM, VM_FF_REQUEST)
336	\|\| VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_REQUEST))
337	{
338	int rc = VMR3ReqProcessU(pVM->pUVM, VMCPUID_ANY, true /fPriorityOnly/);
339	if (rc == VINF_SUCCESS)
340	rc = VMR3ReqProcessU(pVM->pUVM, pVCpu->idCpu, true /fPriorityOnly/);
341	if (rc != VINF_SUCCESS)
342	{
343	/** @todo Ignoring these could be bad. */
344	RTStrmPrintf(g_pStdErr, "[rcReq=%Rrc, ignored!]", rc);
345	RTStrmFlush(g_pStdErr);
346	}
347	}
348
349	/* next */
350	if (!(cWait % 10))
351	{
352	RTStrmPrintf(g_pStdErr, "%d.", cWait / 10);
353	RTStrmFlush(g_pStdErr);
354	}
355	cWait--;
356	}
357
358	RTStrmPrintf(g_pStdErr, "Stopping the VM!\n");
359	RTStrmFlush(g_pStdErr);
360	return false;
361	}
362
363
364	/**
365	* Forced action callback.
366	*
367	* The VMM will call this from it's main loop when either VM_FF_DBGF or
368	* VMCPU_FF_DBGF are set.
369	*
370	* The function checks for and executes pending commands from the debugger.
371	* Then it checks for pending debug events and serves these.
372	*
373	* @returns VINF_SUCCESS normally.
374	* @returns VERR_DBGF_RAISE_FATAL_ERROR to pretend a fatal error happened.
375	* @param pVM The cross context VM structure.
376	* @param pVCpu The cross context per CPU structure.
377	*/
378	VMMR3_INT_DECL(int) DBGFR3VMMForcedAction(PVM pVM, PVMCPU pVCpu)
379	{
380	VBOXSTRICTRC rcStrict = VINF_SUCCESS;
381
382	/*
383	* Dispatch pending events.
384	*/
385	if (VMCPU_FF_TEST_AND_CLEAR(pVCpu, VMCPU_FF_DBGF))
386	{
387	if ( pVCpu->dbgf.s.cEvents > 0
388	&& pVCpu->dbgf.s.aEvents[pVCpu->dbgf.s.cEvents - 1].enmState == DBGFEVENTSTATE_CURRENT)
389	{
390	rcStrict = DBGFR3EventHandlePending(pVM, pVCpu);
391	/** @todo may end up with VERR_DBGF_NOT_ATTACHED here, which will prove fatal... */
392	}
393
394	/*
395	* Command pending? Process it.
396	*/
397	PUVMCPU pUVCpu = pVCpu->pUVCpu;
398	if (pUVCpu->dbgf.s.enmDbgfCmd != DBGFCMD_NO_COMMAND)
399	{
400	bool fResumeExecution;
401	DBGFCMDDATA CmdData = pUVCpu->dbgf.s.DbgfCmdData;
402	DBGFCMD enmCmd = dbgfR3CpuGetCmd(pUVCpu);
403	VBOXSTRICTRC rcStrict2 = dbgfR3CpuCmd(pVCpu, enmCmd, &CmdData, &fResumeExecution);
404	if (!fResumeExecution)
405	rcStrict2 = dbgfR3CpuWait(pVCpu);
406	if ( rcStrict2 != VINF_SUCCESS
407	&& ( rcStrict == VINF_SUCCESS
408	\|\| RT_FAILURE(rcStrict2)
409	\|\| rcStrict2 < rcStrict) ) /** @todo oversimplified? */
410	rcStrict = rcStrict2;
411	}
412	}
413
414	return VBOXSTRICTRC_TODO(rcStrict);
415	}
416
417
418	/**
419	* Try to determine the event context.
420	*
421	* @returns debug event context.
422	* @param pVCpu The cross context vCPU structure.
423	*/
424	static DBGFEVENTCTX dbgfR3FigureEventCtx(PVMCPU pVCpu)
425	{
426	switch (EMGetState(pVCpu))
427	{
428	case EMSTATE_HM:
429	case EMSTATE_NEM:
430	case EMSTATE_DEBUG_GUEST_HM:
431	case EMSTATE_DEBUG_GUEST_NEM:
432	return DBGFEVENTCTX_HM;
433
434	case EMSTATE_IEM:
435	case EMSTATE_RAW:
436	case EMSTATE_IEM_THEN_REM:
437	case EMSTATE_DEBUG_GUEST_IEM:
438	case EMSTATE_DEBUG_GUEST_RAW:
439	return DBGFEVENTCTX_RAW;
440
441
442	case EMSTATE_REM:
443	case EMSTATE_DEBUG_GUEST_REM:
444	return DBGFEVENTCTX_REM;
445
446	case EMSTATE_DEBUG_HYPER:
447	case EMSTATE_GURU_MEDITATION:
448	return DBGFEVENTCTX_HYPER;
449
450	default:
451	return DBGFEVENTCTX_OTHER;
452	}
453	}
454
455
456	/**
457	* Sends the event to the debugger (i.e. adds it to the event ring buffer).
458	*
459	* @returns VBox status code.
460	* @param pVM The cross context VM structure.
461	* @param pVCpu The CPU sending the event.
462	* @param enmType The event type to send.
463	* @param enmCtx The event context, DBGFEVENTCTX_INVALID will be resolved.
464	* @param pvPayload Event payload (DBGFEVENT::u data), optional.
465	* @param cbPayload The size of the event payload, optional.
466	*/
467	static int dbgfR3SendEventWorker(PVM pVM, PVMCPU pVCpu, DBGFEVENTTYPE enmType, DBGFEVENTCTX enmCtx,
468	void const *pvPayload, size_t cbPayload)
469	{
470	PUVM pUVM = pVM->pUVM;
471	pVM->dbgf.s.SteppingFilter.idCpu = NIL_VMCPUID; /** @todo per vCPU stepping filter. */
472
473	/*
474	* Massage the input a little.
475	*/
476	AssertStmt(cbPayload <= RT_SIZEOFMEMB(DBGFEVENT, u), cbPayload = RT_SIZEOFMEMB(DBGFEVENT, u));
477	if (enmCtx == DBGFEVENTCTX_INVALID)
478	enmCtx = dbgfR3FigureEventCtx(pVCpu);
479
480	/*
481	* Put the event into the ring buffer.
482	*/
483	RTSemFastMutexRequest(pUVM->dbgf.s.hMtxDbgEvtWr);
484
485	uint32_t const cDbgEvtMax = RT_MAX(1, pUVM->dbgf.s.cDbgEvtMax);
486	uint32_t const idxDbgEvtWrite = ASMAtomicReadU32(&pUVM->dbgf.s.idxDbgEvtWrite);
487	uint32_t const idxDbgEvtRead = ASMAtomicReadU32(&pUVM->dbgf.s.idxDbgEvtRead);
488	/** @todo Handle full buffer. */ RT_NOREF(idxDbgEvtRead);
489
490	PDBGFEVENT pEvent = &pUVM->dbgf.s.paDbgEvts[idxDbgEvtWrite % cDbgEvtMax];
491
492	#ifdef DEBUG
493	ASMMemFill32(pEvent, sizeof(*pEvent), UINT32_C(0xdeadbeef));
494	#endif
495	pEvent->enmType = enmType;
496	pEvent->enmCtx = enmCtx;
497	pEvent->idCpu = pVCpu->idCpu;
498	pEvent->uReserved = 0;
499	if (cbPayload)
500	memcpy(&pEvent->u, pvPayload, cbPayload);
501
502	ASMAtomicWriteU32(&pUVM->dbgf.s.idxDbgEvtWrite, (idxDbgEvtWrite + 1) % cDbgEvtMax);
503
504	RTSemFastMutexRelease(pUVM->dbgf.s.hMtxDbgEvtWr);
505
506	/*
507	* Signal the debugger.
508	*/
509	return RTSemEventSignal(pUVM->dbgf.s.hEvtWait);
510	}
511
512
513	/**
514	* Send event and wait for the debugger to respond.
515	*
516	* @returns Strict VBox status code.
517	* @param pVM The cross context VM structure.
518	* @param pVCpu The CPU sending the event.
519	* @param enmType The event type to send.
520	* @param enmCtx The event context, DBGFEVENTCTX_INVALID will be resolved.
521	*/
522	DECLINLINE(int) dbgfR3SendEventWait(PVM pVM, PVMCPU pVCpu, DBGFEVENTTYPE enmType, DBGFEVENTCTX enmCtx)
523	{
524	int rc = dbgfR3SendEventWorker(pVM, pVCpu, enmType, enmCtx, NULL, 0);
525	if (RT_SUCCESS(rc))
526	rc = dbgfR3CpuWait(pVCpu);
527	return rc;
528	}
529
530
531	/**
532	* Send event and wait for the debugger to respond, extended version.
533	*
534	* @returns Strict VBox status code.
535	* @param pVM The cross context VM structure.
536	* @param pVCpu The CPU sending the event.
537	* @param enmType The event type to send.
538	* @param enmCtx The event context, DBGFEVENTCTX_INVALID will be resolved.
539	* @param pvPayload Event payload (DBGFEVENT::u data), optional.
540	* @param cbPayload The size of the event payload, optional.
541	*/
542	DECLINLINE(int) dbgfR3SendEventWaitEx(PVM pVM, PVMCPU pVCpu, DBGFEVENTTYPE enmType, DBGFEVENTCTX enmCtx,
543	void const *pvPayload, size_t cbPayload)
544	{
545	int rc = dbgfR3SendEventWorker(pVM, pVCpu, enmType, enmCtx, pvPayload, cbPayload);
546	if (RT_SUCCESS(rc))
547	rc = dbgfR3CpuWait(pVCpu);
548	return rc;
549	}
550
551
552	/**
553	* Send event but do NOT wait for the debugger.
554	*
555	* Currently only used by dbgfR3CpuCmd().
556	*
557	* @param pVM The cross context VM structure.
558	* @param pVCpu The CPU sending the event.
559	* @param enmType The event type to send.
560	* @param enmCtx The event context, DBGFEVENTCTX_INVALID will be resolved.
561	*/
562	DECLINLINE(int) dbgfR3SendEventNoWait(PVM pVM, PVMCPU pVCpu, DBGFEVENTTYPE enmType, DBGFEVENTCTX enmCtx)
563	{
564	return dbgfR3SendEventWorker(pVM, pVCpu, enmType, enmCtx, NULL, 0);
565	}
566
567
568	/**
569	* The common event prologue code.
570	*
571	* It will make sure someone is attached, and perhaps process any high priority
572	* pending actions (none yet).
573	*
574	* @returns VBox status code.
575	* @param pVM The cross context VM structure.
576	* @param pVCpu The vCPU cross context structure.
577	* @param enmEvent The event to be sent.
578	*/
579	static int dbgfR3EventPrologue(PVM pVM, PVMCPU pVCpu, DBGFEVENTTYPE enmEvent)
580	{
581	/*
582	* Check if a debugger is attached.
583	*/
584	if ( !pVM->dbgf.s.fAttached
585	&& !dbgfR3WaitForAttach(pVM, pVCpu, enmEvent))
586	{
587	Log(("dbgfR3EventPrologue: enmEvent=%d - debugger not attached\n", enmEvent));
588	return VERR_DBGF_NOT_ATTACHED;
589	}
590
591	/*
592	* Look thru pending commands and finish those which make sense now.
593	*/
594	/** @todo Process/purge pending commands. */
595	//int rc = DBGFR3VMMForcedAction(pVM);
596	return VINF_SUCCESS;
597	}
598
599
600	/**
601	* Processes a pending event on the current CPU.
602	*
603	* This is called by EM in response to VINF_EM_DBG_EVENT.
604	*
605	* @returns Strict VBox status code.
606	* @param pVM The cross context VM structure.
607	* @param pVCpu The cross context per CPU structure.
608	*
609	* @thread EMT(pVCpu)
610	*/
611	VMMR3_INT_DECL(VBOXSTRICTRC) DBGFR3EventHandlePending(PVM pVM, PVMCPU pVCpu)
612	{
613	VMCPU_ASSERT_EMT(pVCpu);
614	VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_DBGF);
615
616	/*
617	* Check that we've got an event first.
618	*/
619	AssertReturn(pVCpu->dbgf.s.cEvents > 0, VINF_SUCCESS);
620	AssertReturn(pVCpu->dbgf.s.aEvents[pVCpu->dbgf.s.cEvents - 1].enmState == DBGFEVENTSTATE_CURRENT, VINF_SUCCESS);
621	PDBGFEVENT pEvent = &pVCpu->dbgf.s.aEvents[pVCpu->dbgf.s.cEvents - 1].Event;
622
623	/*
624	* Make sure we've got a debugger and is allowed to speak to it.
625	*/
626	int rc = dbgfR3EventPrologue(pVM, pVCpu, pEvent->enmType);
627	if (RT_FAILURE(rc))
628	{
629	/** @todo drop them events? */
630	return rc; /** @todo this will cause trouble if we're here via an FF! */
631	}
632
633	/*
634	* Send the event and mark it as ignore.
635	* ASSUMES no new events get generate while dbgfR3CpuWait is executing!
636	*/
637	VBOXSTRICTRC rcStrict = dbgfR3SendEventWaitEx(pVM, pVCpu, pEvent->enmType, pEvent->enmCtx, &pEvent->u, sizeof(pEvent->u));
638	pVCpu->dbgf.s.aEvents[pVCpu->dbgf.s.cEvents - 1].enmState = DBGFEVENTSTATE_IGNORE;
639	return rcStrict;
640	}
641
642
643	/**
644	* Send a generic debugger event which takes no data.
645	*
646	* @returns VBox status code.
647	* @param pVM The cross context VM structure.
648	* @param enmEvent The event to send.
649	* @internal
650	*/
651	VMMR3DECL(int) DBGFR3Event(PVM pVM, DBGFEVENTTYPE enmEvent)
652	{
653	PVMCPU pVCpu = VMMGetCpu(pVM);
654	AssertReturn(pVCpu, VERR_VM_THREAD_NOT_EMT);
655
656	/*
657	* Do stepping filtering.
658	*/
659	/** @todo Would be better if we did some of this inside the execution
660	* engines. */
661	if ( enmEvent == DBGFEVENT_STEPPED
662	\|\| enmEvent == DBGFEVENT_STEPPED_HYPER)
663	{
664	if (!dbgfStepAreWeThereYet(pVM, pVCpu))
665	return VINF_EM_DBG_STEP;
666	}
667
668	int rc = dbgfR3EventPrologue(pVM, pVCpu, enmEvent);
669	if (RT_FAILURE(rc))
670	return rc;
671
672	/*
673	* Send the event and process the reply communication.
674	*/
675	return dbgfR3SendEventWait(pVM, pVCpu, enmEvent, DBGFEVENTCTX_INVALID);
676	}
677
678
679	/**
680	* Send a debugger event which takes the full source file location.
681	*
682	* @returns VBox status code.
683	* @param pVM The cross context VM structure.
684	* @param enmEvent The event to send.
685	* @param pszFile Source file.
686	* @param uLine Line number in source file.
687	* @param pszFunction Function name.
688	* @param pszFormat Message which accompanies the event.
689	* @param ... Message arguments.
690	* @internal
691	*/
692	VMMR3DECL(int) DBGFR3EventSrc(PVM pVM, DBGFEVENTTYPE enmEvent, const char pszFile, unsigned uLine, const char pszFunction, const char *pszFormat, ...)
693	{
694	va_list args;
695	va_start(args, pszFormat);
696	int rc = DBGFR3EventSrcV(pVM, enmEvent, pszFile, uLine, pszFunction, pszFormat, args);
697	va_end(args);
698	return rc;
699	}
700
701
702	/**
703	* Send a debugger event which takes the full source file location.
704	*
705	* @returns VBox status code.
706	* @param pVM The cross context VM structure.
707	* @param enmEvent The event to send.
708	* @param pszFile Source file.
709	* @param uLine Line number in source file.
710	* @param pszFunction Function name.
711	* @param pszFormat Message which accompanies the event.
712	* @param args Message arguments.
713	* @internal
714	*/
715	VMMR3DECL(int) DBGFR3EventSrcV(PVM pVM, DBGFEVENTTYPE enmEvent, const char pszFile, unsigned uLine, const char pszFunction, const char *pszFormat, va_list args)
716	{
717	PVMCPU pVCpu = VMMGetCpu(pVM);
718	AssertReturn(pVCpu, VERR_VM_THREAD_NOT_EMT);
719
720	int rc = dbgfR3EventPrologue(pVM, pVCpu, enmEvent);
721	if (RT_FAILURE(rc))
722	return rc;
723
724	/*
725	* Format the message.
726	*/
727	char *pszMessage = NULL;
728	char szMessage[8192];
729	if (pszFormat && *pszFormat)
730	{
731	pszMessage = &szMessage[0];
732	RTStrPrintfV(szMessage, sizeof(szMessage), pszFormat, args);
733	}
734
735	/*
736	* Send the event and process the reply communication.
737	*/
738	DBGFEVENT DbgEvent; /** @todo split up DBGFEVENT so we can skip the dead wait on the stack? */
739	DbgEvent.u.Src.pszFile = pszFile;
740	DbgEvent.u.Src.uLine = uLine;
741	DbgEvent.u.Src.pszFunction = pszFunction;
742	DbgEvent.u.Src.pszMessage = pszMessage;
743	return dbgfR3SendEventWaitEx(pVM, pVCpu, enmEvent, DBGFEVENTCTX_INVALID, &DbgEvent.u, sizeof(DbgEvent.u.Src));
744	}
745
746
747	/**
748	* Send a debugger event which takes the two assertion messages.
749	*
750	* @returns VBox status code.
751	* @param pVM The cross context VM structure.
752	* @param enmEvent The event to send.
753	* @param pszMsg1 First assertion message.
754	* @param pszMsg2 Second assertion message.
755	*/
756	VMMR3_INT_DECL(int) DBGFR3EventAssertion(PVM pVM, DBGFEVENTTYPE enmEvent, const char pszMsg1, const char pszMsg2)
757	{
758	PVMCPU pVCpu = VMMGetCpu(pVM);
759	AssertReturn(pVCpu, VERR_VM_THREAD_NOT_EMT);
760
761	int rc = dbgfR3EventPrologue(pVM, pVCpu, enmEvent);
762	if (RT_FAILURE(rc))
763	return rc;
764
765	/*
766	* Send the event and process the reply communication.
767	*/
768	DBGFEVENT DbgEvent;
769	DbgEvent.u.Assert.pszMsg1 = pszMsg1;
770	DbgEvent.u.Assert.pszMsg2 = pszMsg2;
771	return dbgfR3SendEventWaitEx(pVM, pVCpu, enmEvent, DBGFEVENTCTX_INVALID, &DbgEvent.u, sizeof(DbgEvent.u.Assert));
772	}
773
774
775	/**
776	* Breakpoint was hit somewhere.
777	* Figure out which breakpoint it is and notify the debugger.
778	*
779	* @returns VBox status code.
780	* @param pVM The cross context VM structure.
781	* @param enmEvent DBGFEVENT_BREAKPOINT_HYPER or DBGFEVENT_BREAKPOINT.
782	*/
783	VMMR3_INT_DECL(int) DBGFR3EventBreakpoint(PVM pVM, DBGFEVENTTYPE enmEvent)
784	{
785	PVMCPU pVCpu = VMMGetCpu(pVM);
786	AssertReturn(pVCpu, VERR_VM_THREAD_NOT_EMT);
787
788	int rc = dbgfR3EventPrologue(pVM, pVCpu, enmEvent);
789	if (RT_FAILURE(rc))
790	return rc;
791
792	/*
793	* Halt all other vCPUs as well to give the user the ability to inspect other
794	* vCPU states as well.
795	*/
796	rc = dbgfR3EventHaltAllVCpus(pVM, pVCpu);
797	if (RT_FAILURE(rc))
798	return rc;
799
800	/*
801	* Send the event and process the reply communication.
802	*/
803	DBGFEVENT DbgEvent;
804	DbgEvent.u.Bp.hBp = pVCpu->dbgf.s.hBpActive;
805	pVCpu->dbgf.s.hBpActive = NIL_DBGFBP;
806	if (DbgEvent.u.Bp.hBp != NIL_DBGFBP)
807	{
808	DbgEvent.enmCtx = DBGFEVENTCTX_RAW;
809	return dbgfR3SendEventWaitEx(pVM, pVCpu, enmEvent, DBGFEVENTCTX_RAW, &DbgEvent.u, sizeof(DbgEvent.u.Bp));
810	}
811
812	return VERR_DBGF_IPE_1;
813	}
814
815
816	/**
817	* Returns whether the given vCPU is waiting for the debugger.
818	*
819	* @returns Flags whether the vCPU is currently waiting for the debugger.
820	* @param pUVCpu The user mode vCPU structure.
821	*/
822	DECLINLINE(bool) dbgfR3CpuIsHalted(PUVMCPU pUVCpu)
823	{
824	return ASMAtomicReadBool(&pUVCpu->dbgf.s.fStopped);
825	}
826
827
828	/**
829	* Checks whether the given vCPU is waiting in the debugger.
830	*
831	* @returns Flag whether the indicated vCPU is halted, when VMCPUID_ALL
832	* is given true is returned when at least one vCPU is halted.
833	* @param pUVM The user mode VM structure.
834	* @param idCpu The CPU ID to check, VMCPUID_ALL to check all vCPUs.
835	*/
836	DECLINLINE(bool) dbgfR3CpuAreAnyHaltedByCpuId(PUVM pUVM, VMCPUID idCpu)
837	{
838	AssertReturn(idCpu < pUVM->cCpus \|\| idCpu == VMCPUID_ALL, false);
839
840	/* Check that either the given vCPU or all are actually halted. */
841	if (idCpu != VMCPUID_ALL)
842	return dbgfR3CpuIsHalted(&pUVM->aCpus[idCpu]);
843
844	for (VMCPUID i = 0; i < pUVM->cCpus; i++)
845	if (dbgfR3CpuIsHalted(&pUVM->aCpus[i]))
846	return true;
847	return false;
848	}
849
850
851	/**
852	* Gets the pending debug command for this EMT/CPU, replacing it with
853	* DBGFCMD_NO_COMMAND.
854	*
855	* @returns Pending command.
856	* @param pUVCpu The user mode virtual CPU structure.
857	* @thread EMT(pUVCpu)
858	*/
859	DECLINLINE(DBGFCMD) dbgfR3CpuGetCmd(PUVMCPU pUVCpu)
860	{
861	DBGFCMD enmCmd = (DBGFCMD)ASMAtomicXchgU32((uint32_t volatile )(void )&pUVCpu->dbgf.s.enmDbgfCmd, DBGFCMD_NO_COMMAND);
862	Log2(("DBGF: Getting command: %d\n", enmCmd));
863	return enmCmd;
864	}
865
866
867	/**
868	* Send a debug command to a CPU, making sure to notify it.
869	*
870	* @returns VBox status code.
871	* @param pUVCpu The user mode virtual CPU structure.
872	* @param enmCmd The command to submit to the CPU.
873	*/
874	DECLINLINE(int) dbgfR3CpuSetCmdAndNotify(PUVMCPU pUVCpu, DBGFCMD enmCmd)
875	{
876	Log2(("DBGF: Setting command to %d\n", enmCmd));
877	Assert(enmCmd != DBGFCMD_NO_COMMAND);
878	AssertMsg(pUVCpu->dbgf.s.enmDbgfCmd == DBGFCMD_NO_COMMAND, ("enmCmd=%d enmDbgfCmd=%d\n", enmCmd, pUVCpu->dbgf.s.enmDbgfCmd));
879
880	ASMAtomicWriteU32((uint32_t volatile )(void )&pUVCpu->dbgf.s.enmDbgfCmd, enmCmd);
881	VMCPU_FF_SET(pUVCpu->pVCpu, VMCPU_FF_DBGF);
882
883	VMR3NotifyCpuFFU(pUVCpu, 0 /fFlags/);
884	return VINF_SUCCESS;
885	}
886
887
888	/**
889	* @callback_method_impl{FNVMMEMTRENDEZVOUS}
890	*/
891	static DECLCALLBACK(VBOXSTRICTRC) dbgfR3EventHaltEmtWorker(PVM pVM, PVMCPU pVCpu, void *pvUser)
892	{
893	RT_NOREF(pvUser);
894
895	VMCPU_ASSERT_EMT(pVCpu);
896	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
897
898	PUVMCPU pUVCpu = pVCpu->pUVCpu;
899	if ( pVCpu != (PVMCPU)pvUser
900	&& !dbgfR3CpuIsHalted(pUVCpu))
901	dbgfR3CpuSetCmdAndNotify(pUVCpu, DBGFCMD_HALT);
902
903	return VINF_SUCCESS;
904	}
905
906
907	/**
908	* Halts all vCPUs of the given VM except for the given one.
909	*
910	* @returns VBox status code.
911	* @param pVM The cross context VM structure.
912	* @param pVCpuExclude The vCPU cross context structure of the vCPU to exclude.
913	*/
914	static int dbgfR3EventHaltAllVCpus(PVM pVM, PVMCPU pVCpuExclude)
915	{
916	return VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ALL_AT_ONCE, dbgfR3EventHaltEmtWorker, pVCpuExclude);
917	}
918
919
920	/**
921	* Waits for the debugger to respond.
922	*
923	* @returns VBox status code. (clearify)
924	* @param pVCpu The cross context vCPU structure.
925	*/
926	static int dbgfR3CpuWait(PVMCPU pVCpu)
927	{
928	PVM pVM = pVCpu->CTX_SUFF(pVM);
929	PUVMCPU pUVCpu = pVCpu->pUVCpu;
930
931	LogFlow(("dbgfR3CpuWait:\n"));
932	int rcRet = VINF_SUCCESS;
933
934	ASMAtomicWriteBool(&pUVCpu->dbgf.s.fStopped, true);
935
936	/*
937	* Waits for the debugger to reply (i.e. issue an command).
938	*/
939	for (;;)
940	{
941	/*
942	* Wait.
943	*/
944	for (;;)
945	{
946	/*
947	* Process forced flags before we go sleep.
948	*/
949	if ( VMCPU_FF_IS_ANY_SET(pVCpu, VMCPU_FF_DBGF \| VMCPU_FF_REQUEST)
950	\|\| VM_FF_IS_ANY_SET(pVM, VM_FF_EMT_RENDEZVOUS \| VMCPU_FF_REQUEST \| VM_FF_CHECK_VM_STATE))
951	{
952	if (VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_DBGF))
953	break;
954
955	int rc;
956	if (VM_FF_IS_SET(pVM, VM_FF_EMT_RENDEZVOUS))
957	rc = VMMR3EmtRendezvousFF(pVM, pVCpu);
958	else if ( VM_FF_IS_SET(pVM, VM_FF_REQUEST)
959	\|\| VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_REQUEST))
960	{
961	LogFlow(("dbgfR3CpuWait: Processes requests...\n"));
962	rc = VMR3ReqProcessU(pVM->pUVM, VMCPUID_ANY, false /fPriorityOnly/);
963	if (rc == VINF_SUCCESS)
964	rc = VMR3ReqProcessU(pVM->pUVM, pVCpu->idCpu, false /fPriorityOnly/);
965	LogFlow(("dbgfR3CpuWait: VMR3ReqProcess -> %Rrc rcRet=%Rrc\n", rc, rcRet));
966	}
967	else if (VM_FF_IS_SET(pVM, VM_FF_CHECK_VM_STATE))
968	{
969	VMSTATE enmState = VMR3GetState(pVM);
970	switch (enmState)
971	{
972	case VMSTATE_FATAL_ERROR:
973	case VMSTATE_FATAL_ERROR_LS:
974	case VMSTATE_GURU_MEDITATION:
975	case VMSTATE_GURU_MEDITATION_LS:
976	rc = VINF_EM_SUSPEND;
977	break;
978	case VMSTATE_DESTROYING:
979	rc = VINF_EM_TERMINATE;
980	break;
981	default:
982	rc = VERR_DBGF_IPE_1;
983	AssertMsgFailed(("%s\n", VMGetStateName(enmState)));
984	}
985	}
986	else
987	rc = VINF_SUCCESS;
988	if (rc >= VINF_EM_FIRST && rc <= VINF_EM_LAST)
989	{
990	switch (rc)
991	{
992	case VINF_EM_DBG_BREAKPOINT:
993	case VINF_EM_DBG_STEPPED:
994	case VINF_EM_DBG_STEP:
995	case VINF_EM_DBG_STOP:
996	case VINF_EM_DBG_EVENT:
997	AssertMsgFailed(("rc=%Rrc\n", rc));
998	break;
999
1000	/* return straight away */
1001	case VINF_EM_TERMINATE:
1002	case VINF_EM_OFF:
1003	LogFlow(("dbgfR3CpuWait: returns %Rrc\n", rc));
1004	ASMAtomicWriteBool(&pUVCpu->dbgf.s.fStopped, false);
1005	return rc;
1006
1007	/* remember return code. */
1008	default:
1009	AssertReleaseMsgFailed(("rc=%Rrc is not in the switch!\n", rc));
1010	RT_FALL_THRU();
1011	case VINF_EM_RESET:
1012	case VINF_EM_SUSPEND:
1013	case VINF_EM_HALT:
1014	case VINF_EM_RESUME:
1015	case VINF_EM_RESCHEDULE:
1016	case VINF_EM_RESCHEDULE_REM:
1017	case VINF_EM_RESCHEDULE_RAW:
1018	if (rc < rcRet \|\| rcRet == VINF_SUCCESS)
1019	rcRet = rc;
1020	break;
1021	}
1022	}
1023	else if (RT_FAILURE(rc))
1024	{
1025	LogFlow(("dbgfR3CpuWait: returns %Rrc\n", rc));
1026	ASMAtomicWriteBool(&pUVCpu->dbgf.s.fStopped, false);
1027	return rc;
1028	}
1029	}
1030	else if (pVM->dbgf.s.fAttached)
1031	{
1032	int rc = VMR3WaitU(pUVCpu);
1033	if (RT_FAILURE(rc))
1034	{
1035	LogFlow(("dbgfR3CpuWait: returns %Rrc (VMR3WaitU)\n", rc));
1036	ASMAtomicWriteBool(&pUVCpu->dbgf.s.fStopped, false);
1037	return rc;
1038	}
1039	}
1040	else
1041	{
1042	LogFlow(("dbgfR3CpuWait: Debugger detached, continuing normal execution (%Rrc)\n", rcRet));
1043	ASMAtomicWriteBool(&pUVCpu->dbgf.s.fStopped, false);
1044	return rcRet;
1045	}
1046	}
1047
1048	/*
1049	* Process the command.
1050	*/
1051	VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_DBGF);
1052	bool fResumeExecution;
1053	DBGFCMDDATA CmdData = pUVCpu->dbgf.s.DbgfCmdData;
1054	DBGFCMD enmCmd = dbgfR3CpuGetCmd(pUVCpu);
1055	int rc = dbgfR3CpuCmd(pVCpu, enmCmd, &CmdData, &fResumeExecution);
1056	if (fResumeExecution)
1057	{
1058	if (RT_FAILURE(rc))
1059	rcRet = rc;
1060	else if ( rc >= VINF_EM_FIRST
1061	&& rc <= VINF_EM_LAST
1062	&& (rc < rcRet \|\| rcRet == VINF_SUCCESS))
1063	rcRet = rc;
1064	LogFlow(("dbgfR3CpuWait: returns %Rrc\n", rcRet));
1065	ASMAtomicWriteBool(&pUVCpu->dbgf.s.fStopped, false);
1066	return rcRet;
1067	}
1068	}
1069	}
1070
1071
1072	/**
1073	* Executes command from debugger.
1074	*
1075	* The caller is responsible for waiting or resuming execution based on the
1076	* value returned in the *pfResumeExecution indicator.
1077	*
1078	* @returns VBox status code. (clearify!)
1079	* @param pVCpu The cross context vCPU structure.
1080	* @param enmCmd The command in question.
1081	* @param pCmdData Pointer to the command data.
1082	* @param pfResumeExecution Where to store the resume execution / continue waiting indicator.
1083	*/
1084	static int dbgfR3CpuCmd(PVMCPU pVCpu, DBGFCMD enmCmd, PDBGFCMDDATA pCmdData, bool *pfResumeExecution)
1085	{
1086	RT_NOREF(pCmdData); /* for later */
1087
1088	/*
1089	* The cases in this switch returns directly if no event to send.
1090	*/
1091	DBGFEVENTTYPE enmEvent;
1092	DBGFEVENTCTX enmCtx = DBGFEVENTCTX_INVALID;
1093	switch (enmCmd)
1094	{
1095	/*
1096	* Halt is answered by an event say that we've halted.
1097	*/
1098	case DBGFCMD_HALT:
1099	{
1100	*pfResumeExecution = false;
1101	enmEvent = DBGFEVENT_HALT_DONE;
1102	break;
1103	}
1104
1105
1106	/*
1107	* Resume is not answered, we just resume execution.
1108	*/
1109	case DBGFCMD_GO:
1110	{
1111	pVCpu->dbgf.s.fSingleSteppingRaw = false;
1112	*pfResumeExecution = true;
1113	return VINF_SUCCESS;
1114	}
1115
1116	/** @todo implement (and define) the rest of the commands. */
1117
1118	/*
1119	* Single step, with trace into.
1120	*/
1121	case DBGFCMD_SINGLE_STEP:
1122	{
1123	Log2(("Single step\n"));
1124	PVM pVM = pVCpu->CTX_SUFF(pVM);
1125	if (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_OVER)
1126	{
1127	if (dbgfStepGetCurInstrType(pVM, pVCpu) == DBGFSTEPINSTRTYPE_CALL)
1128	pVM->dbgf.s.SteppingFilter.uCallDepth++;
1129	}
1130	if (pVM->dbgf.s.SteppingFilter.cMaxSteps > 0)
1131	{
1132	pVCpu->dbgf.s.fSingleSteppingRaw = true;
1133	*pfResumeExecution = true;
1134	return VINF_EM_DBG_STEP;
1135	}
1136	/* Stop after zero steps. Nonsense, but whatever. */
1137	pVM->dbgf.s.SteppingFilter.idCpu = NIL_VMCPUID;
1138	*pfResumeExecution = false;
1139	enmCtx = dbgfR3FigureEventCtx(pVCpu);
1140	enmEvent = enmCtx != DBGFEVENTCTX_HYPER ? DBGFEVENT_STEPPED : DBGFEVENT_STEPPED_HYPER;
1141	break;
1142	}
1143
1144	/*
1145	* Default is to send an invalid command event.
1146	*/
1147	default:
1148	{
1149	*pfResumeExecution = false;
1150	enmEvent = DBGFEVENT_INVALID_COMMAND;
1151	break;
1152	}
1153	}
1154
1155	/*
1156	* Send the pending event.
1157	*/
1158	Log2(("DBGF: Emulation thread: sending event %d\n", enmEvent));
1159	int rc = dbgfR3SendEventNoWait(pVCpu->CTX_SUFF(pVM), pVCpu, enmEvent, enmCtx);
1160	AssertRCStmt(rc, *pfResumeExecution = true);
1161	return rc;
1162	}
1163
1164
1165	/**
1166	* @callback_method_impl{FNVMMEMTRENDEZVOUS,
1167	* EMT rendezvous worker for DBGFR3Attach - only called on one EMT.}
1168	*/
1169	static DECLCALLBACK(VBOXSTRICTRC) dbgfR3Attach(PVM pVM, PVMCPU pVCpu, void *pvUser)
1170	{
1171	PUVM pUVM = pVM->pUVM;
1172	int prcAttach = (int )pvUser;
1173	RT_NOREF(pVCpu);
1174
1175	if (pVM->dbgf.s.fAttached)
1176	{
1177	Log(("dbgfR3Attach: Debugger already attached\n"));
1178	*prcAttach = VERR_DBGF_ALREADY_ATTACHED;
1179	return VINF_SUCCESS;
1180	}
1181
1182	/*
1183	* The per-CPU bits.
1184	*/
1185	for (uint32_t i = 0; i < pUVM->cCpus; i++)
1186	{
1187	PUVMCPU pUVCpu = &pUVM->aCpus[i];
1188
1189	pUVCpu->dbgf.s.enmDbgfCmd = DBGFCMD_NO_COMMAND;
1190	RT_ZERO(pUVCpu->dbgf.s.DbgfCmdData);
1191	}
1192
1193	/*
1194	* Init of the VM -> Debugger communication part living in the global VM structure.
1195	*/
1196	pUVM->dbgf.s.cDbgEvtMax = pVM->cCpus * 5 + 10; /* Initial size of event ring, increased when being full. */
1197	pUVM->dbgf.s.idxDbgEvtWrite = 0;
1198	pUVM->dbgf.s.idxDbgEvtRead = 0;
1199	pUVM->dbgf.s.hEvtWait = NIL_RTSEMEVENT;
1200	pUVM->dbgf.s.hEvtRingBufFull = NIL_RTSEMEVENTMULTI;
1201	pUVM->dbgf.s.hMtxDbgEvtWr = NIL_RTSEMFASTMUTEX;
1202	int rc;
1203	pUVM->dbgf.s.paDbgEvts = (PDBGFEVENT)MMR3HeapAllocU(pUVM, MM_TAG_DBGF, pUVM->dbgf.s.cDbgEvtMax * sizeof(DBGFEVENT));
1204	if (pUVM->dbgf.s.paDbgEvts)
1205	{
1206	rc = RTSemEventCreate(&pUVM->dbgf.s.hEvtWait);
1207	if (RT_SUCCESS(rc))
1208	{
1209	rc = RTSemFastMutexCreate(&pUVM->dbgf.s.hMtxDbgEvtWr);
1210	if (RT_SUCCESS(rc))
1211	{
1212	rc = RTSemEventMultiCreate(&pUVM->dbgf.s.hEvtRingBufFull);
1213	if (RT_SUCCESS(rc))
1214	{
1215	/*
1216	* At last, set the attached flag.
1217	*/
1218	ASMAtomicWriteBool(&pVM->dbgf.s.fAttached, true);
1219	*prcAttach = VINF_SUCCESS;
1220	return VINF_SUCCESS;
1221	}
1222
1223	RTSemFastMutexDestroy(pUVM->dbgf.s.hMtxDbgEvtWr);
1224	pUVM->dbgf.s.hMtxDbgEvtWr = NIL_RTSEMFASTMUTEX;
1225	}
1226	RTSemEventDestroy(pUVM->dbgf.s.hEvtWait);
1227	pUVM->dbgf.s.hEvtWait = NIL_RTSEMEVENT;
1228	}
1229	}
1230	else
1231	rc = VERR_NO_MEMORY;
1232
1233	*prcAttach = rc;
1234	return VINF_SUCCESS;
1235	}
1236
1237
1238	/**
1239	* Attaches a debugger to the specified VM.
1240	*
1241	* Only one debugger at a time.
1242	*
1243	* @returns VBox status code.
1244	* @param pUVM The user mode VM handle.
1245	*/
1246	VMMR3DECL(int) DBGFR3Attach(PUVM pUVM)
1247	{
1248	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1249	PVM pVM = pUVM->pVM;
1250	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1251
1252	/*
1253	* Call the VM, use EMT rendezvous for serialization.
1254	*/
1255	int rcAttach = VERR_IPE_UNINITIALIZED_STATUS;
1256	int rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE \| VMMEMTRENDEZVOUS_FLAGS_PRIORITY, dbgfR3Attach, &rcAttach);
1257	if (RT_SUCCESS(rc))
1258	rc = rcAttach;
1259
1260	return rc;
1261	}
1262
1263
1264	/**
1265	* @callback_method_impl{FNVMMEMTRENDEZVOUS,
1266	* EMT rendezvous worker for DBGFR3Detach - called on all EMTs (why?).}
1267	*/
1268	static DECLCALLBACK(VBOXSTRICTRC) dbgfR3Detach(PVM pVM, PVMCPU pVCpu, void *pvUser)
1269	{
1270	if (pVCpu->idCpu == 0)
1271	{
1272	PUVM pUVM = (PUVM)pvUser;
1273
1274	/*
1275	* Per-CPU cleanup.
1276	*/
1277	for (VMCPUID i = 0; i < pUVM->cCpus; i++)
1278	{
1279	PUVMCPU pUVCpu = &pUVM->aCpus[i];
1280
1281	pUVCpu->dbgf.s.enmDbgfCmd = DBGFCMD_NO_COMMAND;
1282	RT_ZERO(pUVCpu->dbgf.s.DbgfCmdData);
1283	}
1284
1285	/*
1286	* De-init of the VM -> Debugger communication part living in the global VM structure.
1287	*/
1288	if (pUVM->dbgf.s.paDbgEvts)
1289	{
1290	MMR3HeapFree(pUVM->dbgf.s.paDbgEvts);
1291	pUVM->dbgf.s.paDbgEvts = NULL;
1292	}
1293
1294	if (pUVM->dbgf.s.hEvtWait != NIL_RTSEMEVENT)
1295	{
1296	RTSemEventDestroy(pUVM->dbgf.s.hEvtWait);
1297	pUVM->dbgf.s.hEvtWait = NIL_RTSEMEVENT;
1298	}
1299
1300	if (pUVM->dbgf.s.hMtxDbgEvtWr != NIL_RTSEMFASTMUTEX)
1301	{
1302	RTSemFastMutexDestroy(pUVM->dbgf.s.hMtxDbgEvtWr);
1303	pUVM->dbgf.s.hMtxDbgEvtWr = NIL_RTSEMFASTMUTEX;
1304	}
1305
1306	if (pUVM->dbgf.s.hEvtRingBufFull != NIL_RTSEMEVENTMULTI)
1307	{
1308	RTSemEventMultiDestroy(pUVM->dbgf.s.hEvtRingBufFull);
1309	pUVM->dbgf.s.hEvtRingBufFull = NIL_RTSEMEVENTMULTI;
1310	}
1311
1312	pUVM->dbgf.s.cDbgEvtMax = 0;
1313	pUVM->dbgf.s.idxDbgEvtWrite = 0;
1314	pUVM->dbgf.s.idxDbgEvtRead = 0;
1315	pUVM->dbgf.s.hEvtWait = NIL_RTSEMEVENT;
1316	pUVM->dbgf.s.hEvtRingBufFull = NIL_RTSEMEVENTMULTI;
1317	pUVM->dbgf.s.hMtxDbgEvtWr = NIL_RTSEMFASTMUTEX;
1318
1319	ASMAtomicWriteBool(&pVM->dbgf.s.fAttached, false);
1320	}
1321
1322	return VINF_SUCCESS;
1323	}
1324
1325
1326	/**
1327	* Detaches a debugger from the specified VM.
1328	*
1329	* Caller must be attached to the VM.
1330	*
1331	* @returns VBox status code.
1332	* @param pUVM The user mode VM handle.
1333	*/
1334	VMMR3DECL(int) DBGFR3Detach(PUVM pUVM)
1335	{
1336	LogFlow(("DBGFR3Detach:\n"));
1337
1338	/*
1339	* Validate input. The UVM handle shall be valid, the VM handle might be
1340	* in the processes of being destroyed already, so deal quietly with that.
1341	*/
1342	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1343	PVM pVM = pUVM->pVM;
1344	if (!VM_IS_VALID_EXT(pVM))
1345	return VERR_INVALID_VM_HANDLE;
1346
1347	/*
1348	* Check if attached.
1349	*/
1350	if (!pVM->dbgf.s.fAttached)
1351	return VERR_DBGF_NOT_ATTACHED;
1352
1353	return VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ALL_AT_ONCE \| VMMEMTRENDEZVOUS_FLAGS_PRIORITY, dbgfR3Detach, pUVM);
1354	}
1355
1356
1357	/**
1358	* Wait for a debug event.
1359	*
1360	* @returns VBox status code. Will not return VBOX_INTERRUPTED.
1361	* @param pUVM The user mode VM handle.
1362	* @param cMillies Number of millis to wait.
1363	* @param pEvent Where to store the event data.
1364	*/
1365	VMMR3DECL(int) DBGFR3EventWait(PUVM pUVM, RTMSINTERVAL cMillies, PDBGFEVENT pEvent)
1366	{
1367	/*
1368	* Check state.
1369	*/
1370	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1371	PVM pVM = pUVM->pVM;
1372	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1373	AssertReturn(pVM->dbgf.s.fAttached, VERR_DBGF_NOT_ATTACHED);
1374
1375	RT_BZERO(pEvent, sizeof(*pEvent));
1376
1377	/*
1378	* Wait for an event to arrive if there are none.
1379	*/
1380	int rc = VINF_SUCCESS;
1381	uint32_t idxDbgEvtRead = ASMAtomicReadU32(&pUVM->dbgf.s.idxDbgEvtRead);
1382	if (idxDbgEvtRead == ASMAtomicReadU32(&pUVM->dbgf.s.idxDbgEvtWrite))
1383	{
1384	do
1385	{
1386	rc = RTSemEventWait(pUVM->dbgf.s.hEvtWait, cMillies);
1387	} while ( RT_SUCCESS(rc)
1388	&& idxDbgEvtRead == ASMAtomicReadU32(&pUVM->dbgf.s.idxDbgEvtWrite));
1389	}
1390
1391	if (RT_SUCCESS(rc))
1392	{
1393	Assert(idxDbgEvtRead != ASMAtomicReadU32(&pUVM->dbgf.s.idxDbgEvtWrite));
1394
1395	uint32_t const cDbgEvtMax = RT_MAX(1, pUVM->dbgf.s.cDbgEvtMax);
1396	memcpy(pEvent, &pUVM->dbgf.s.paDbgEvts[idxDbgEvtRead % cDbgEvtMax], sizeof(*pEvent));
1397	ASMAtomicWriteU32(&pUVM->dbgf.s.idxDbgEvtRead, (idxDbgEvtRead + 1) % cDbgEvtMax);
1398	}
1399
1400	Log2(("DBGFR3EventWait: rc=%Rrc (event type %d)\n", rc, pEvent->enmType));
1401	return rc;
1402	}
1403
1404
1405	/**
1406	* Halts VM execution.
1407	*
1408	* After calling this the VM isn't actually halted till an DBGFEVENT_HALT_DONE
1409	* arrives. Until that time it's not possible to issue any new commands.
1410	*
1411	* @returns VBox status code.
1412	* @retval VWRN_DBGF_ALREADY_HALTED if @a idCpu is VMCPUID_ALL and all vCPUs
1413	* are halted.
1414	* @param pUVM The user mode VM handle.
1415	* @param idCpu The vCPU to halt, VMCPUID_ALL halts all still running vCPUs.
1416	*/
1417	VMMR3DECL(int) DBGFR3Halt(PUVM pUVM, VMCPUID idCpu)
1418	{
1419	/*
1420	* Check state.
1421	*/
1422	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1423	PVM pVM = pUVM->pVM;
1424	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1425	AssertReturn(pVM->dbgf.s.fAttached, VERR_DBGF_NOT_ATTACHED);
1426	AssertReturn(idCpu == VMCPUID_ALL \|\| idCpu < pVM->cCpus, VERR_INVALID_CPU_ID);
1427
1428	/*
1429	* Halt the requested CPUs as needed.
1430	*/
1431	int rc;
1432	if (idCpu != VMCPUID_ALL)
1433	{
1434	PUVMCPU pUVCpu = &pUVM->aCpus[idCpu];
1435	if (!dbgfR3CpuIsHalted(pUVCpu))
1436	{
1437	dbgfR3CpuSetCmdAndNotify(pUVCpu, DBGFCMD_HALT);
1438	rc = VINF_SUCCESS;
1439	}
1440	else
1441	rc = VWRN_DBGF_ALREADY_HALTED;
1442	}
1443	else
1444	{
1445	rc = VWRN_DBGF_ALREADY_HALTED;
1446	for (VMCPUID i = 0; i < pUVM->cCpus; i++)
1447	{
1448	PUVMCPU pUVCpu = &pUVM->aCpus[i];
1449	if (!dbgfR3CpuIsHalted(pUVCpu))
1450	{
1451	dbgfR3CpuSetCmdAndNotify(pUVCpu, DBGFCMD_HALT);
1452	rc = VINF_SUCCESS;
1453	}
1454	}
1455	}
1456
1457	return rc;
1458	}
1459
1460
1461	/**
1462	* Checks if any of the specified vCPUs have been halted by the debugger.
1463	*
1464	* @returns True if at least one halted vCPUs.
1465	* @returns False if no halted vCPUs.
1466	* @param pUVM The user mode VM handle.
1467	* @param idCpu The CPU id to check for, VMCPUID_ALL will return true if
1468	* at least a single vCPU is halted in the debugger.
1469	*/
1470	VMMR3DECL(bool) DBGFR3IsHalted(PUVM pUVM, VMCPUID idCpu)
1471	{
1472	UVM_ASSERT_VALID_EXT_RETURN(pUVM, false);
1473	PVM pVM = pUVM->pVM;
1474	VM_ASSERT_VALID_EXT_RETURN(pVM, false);
1475	AssertReturn(pVM->dbgf.s.fAttached, false);
1476
1477	return dbgfR3CpuAreAnyHaltedByCpuId(pUVM, idCpu);
1478	}
1479
1480
1481	/**
1482	* Checks if the debugger can wait for events or not.
1483	*
1484	* This function is only used by lazy, multiplexing debuggers. :-)
1485	*
1486	* @returns VBox status code.
1487	* @retval VINF_SUCCESS if waitable.
1488	* @retval VERR_SEM_OUT_OF_TURN if not waitable.
1489	* @retval VERR_INVALID_VM_HANDLE if the VM is being (/ has been) destroyed
1490	* (not asserted) or if the handle is invalid (asserted).
1491	* @retval VERR_DBGF_NOT_ATTACHED if not attached.
1492	*
1493	* @param pUVM The user mode VM handle.
1494	*/
1495	VMMR3DECL(int) DBGFR3QueryWaitable(PUVM pUVM)
1496	{
1497	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1498
1499	/* Note! There is a slight race here, unfortunately. */
1500	PVM pVM = pUVM->pVM;
1501	if (!RT_VALID_PTR(pVM))
1502	return VERR_INVALID_VM_HANDLE;
1503	if (pVM->enmVMState >= VMSTATE_DESTROYING)
1504	return VERR_INVALID_VM_HANDLE;
1505	if (!pVM->dbgf.s.fAttached)
1506	return VERR_DBGF_NOT_ATTACHED;
1507
1508	/** @todo was: if (!RTSemPongShouldWait(...)) return VERR_SEM_OUT_OF_TURN; */
1509	return VINF_SUCCESS;
1510	}
1511
1512
1513	/**
1514	* Resumes VM execution.
1515	*
1516	* There is no receipt event on this command.
1517	*
1518	* @returns VBox status code.
1519	* @retval VWRN_DBGF_ALREADY_RUNNING if the specified vCPUs are all running.
1520	* @param pUVM The user mode VM handle.
1521	* @param idCpu The vCPU to resume, VMCPUID_ALL resumes all still halted vCPUs.
1522	*/
1523	VMMR3DECL(int) DBGFR3Resume(PUVM pUVM, VMCPUID idCpu)
1524	{
1525	/*
1526	* Validate input and attachment state.
1527	*/
1528	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1529	PVM pVM = pUVM->pVM;
1530	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1531	AssertReturn(pVM->dbgf.s.fAttached, VERR_DBGF_NOT_ATTACHED);
1532
1533	/*
1534	* Ping the halted emulation threads, telling them to run.
1535	*/
1536	int rc = VWRN_DBGF_ALREADY_RUNNING;
1537	if (idCpu != VMCPUID_ALL)
1538	{
1539	PUVMCPU pUVCpu = &pUVM->aCpus[idCpu];
1540	if (dbgfR3CpuIsHalted(pUVCpu))
1541	{
1542	rc = dbgfR3CpuSetCmdAndNotify(pUVCpu, DBGFCMD_GO);
1543	AssertRC(rc);
1544	}
1545	}
1546	else
1547	{
1548	for (VMCPUID i = 0; i < pUVM->cCpus; i++)
1549	{
1550	PUVMCPU pUVCpu = &pUVM->aCpus[i];
1551	if (dbgfR3CpuIsHalted(pUVCpu))
1552	{
1553	int rc2 = dbgfR3CpuSetCmdAndNotify(pUVCpu, DBGFCMD_GO);
1554	AssertRC(rc2);
1555	if (rc == VWRN_DBGF_ALREADY_RUNNING \|\| RT_FAILURE(rc2))
1556	rc = rc2;
1557	}
1558	}
1559	}
1560
1561	return rc;
1562	}
1563
1564
1565	/**
1566	* Classifies the current instruction.
1567	*
1568	* @returns Type of instruction.
1569	* @param pVM The cross context VM structure.
1570	* @param pVCpu The current CPU.
1571	* @thread EMT(pVCpu)
1572	*/
1573	static DBGFSTEPINSTRTYPE dbgfStepGetCurInstrType(PVM pVM, PVMCPU pVCpu)
1574	{
1575	/*
1576	* Read the instruction.
1577	*/
1578	size_t cbRead = 0;
1579	uint8_t abOpcode[16] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
1580	int rc = PGMR3DbgReadGCPtr(pVM, abOpcode, CPUMGetGuestFlatPC(pVCpu), sizeof(abOpcode) - 1, 0 /fFlags/, &cbRead);
1581	if (RT_SUCCESS(rc))
1582	{
1583	/*
1584	* Do minimal parsing. No real need to involve the disassembler here.
1585	*/
1586	uint8_t *pb = abOpcode;
1587	for (;;)
1588	{
1589	switch (*pb++)
1590	{
1591	default:
1592	return DBGFSTEPINSTRTYPE_OTHER;
1593
1594	case 0xe8: /* call rel16/32 */
1595	case 0x9a: /* call farptr */
1596	case 0xcc: /* int3 */
1597	case 0xcd: /* int xx */
1598	// case 0xce: /* into */
1599	return DBGFSTEPINSTRTYPE_CALL;
1600
1601	case 0xc2: /* ret xx */
1602	case 0xc3: /* ret */
1603	case 0xca: /* retf xx */
1604	case 0xcb: /* retf */
1605	case 0xcf: /* iret */
1606	return DBGFSTEPINSTRTYPE_RET;
1607
1608	case 0xff:
1609	if ( ((pb >> X86_MODRM_REG_SHIFT) & X86_MODRM_REG_SMASK) == 2 / call indir */
1610	\|\| ((pb >> X86_MODRM_REG_SHIFT) & X86_MODRM_REG_SMASK) == 3) / call indir-farptr */
1611	return DBGFSTEPINSTRTYPE_CALL;
1612	return DBGFSTEPINSTRTYPE_OTHER;
1613
1614	case 0x0f:
1615	switch (*pb++)
1616	{
1617	case 0x05: /* syscall */
1618	case 0x34: /* sysenter */
1619	return DBGFSTEPINSTRTYPE_CALL;
1620	case 0x07: /* sysret */
1621	case 0x35: /* sysexit */
1622	return DBGFSTEPINSTRTYPE_RET;
1623	}
1624	break;
1625
1626	/* Must handle some REX prefixes. So we do all normal prefixes. */
1627	case 0x40: case 0x41: case 0x42: case 0x43: case 0x44: case 0x45: case 0x46: case 0x47:
1628	case 0x48: case 0x49: case 0x4a: case 0x4b: case 0x4c: case 0x4d: case 0x4e: case 0x4f:
1629	if (!CPUMIsGuestIn64BitCode(pVCpu))
1630	return DBGFSTEPINSTRTYPE_OTHER;
1631	break;
1632
1633	case 0x2e: /* CS */
1634	case 0x36: /* SS */
1635	case 0x3e: /* DS */
1636	case 0x26: /* ES */
1637	case 0x64: /* FS */
1638	case 0x65: /* GS */
1639	case 0x66: /* op size */
1640	case 0x67: /* addr size */
1641	case 0xf0: /* lock */
1642	case 0xf2: /* REPNZ */
1643	case 0xf3: /* REPZ */
1644	break;
1645	}
1646	}
1647	}
1648
1649	return DBGFSTEPINSTRTYPE_INVALID;
1650	}
1651
1652
1653	/**
1654	* Checks if the stepping has reached a stop point.
1655	*
1656	* Called when raising a stepped event.
1657	*
1658	* @returns true if the event should be raised, false if we should take one more
1659	* step first.
1660	* @param pVM The cross context VM structure.
1661	* @param pVCpu The cross context per CPU structure of the calling EMT.
1662	* @thread EMT(pVCpu)
1663	*/
1664	static bool dbgfStepAreWeThereYet(PVM pVM, PVMCPU pVCpu)
1665	{
1666	/*
1667	* Check valid pVCpu and that it matches the CPU one stepping.
1668	*/
1669	if (pVCpu)
1670	{
1671	if (pVCpu->idCpu == pVM->dbgf.s.SteppingFilter.idCpu)
1672	{
1673	/*
1674	* Increase the number of steps and see if we've reached the max.
1675	*/
1676	pVM->dbgf.s.SteppingFilter.cSteps++;
1677	if (pVM->dbgf.s.SteppingFilter.cSteps < pVM->dbgf.s.SteppingFilter.cMaxSteps)
1678	{
1679	/*
1680	* Check PC and SP address filtering.
1681	*/
1682	if (pVM->dbgf.s.SteppingFilter.fFlags & (DBGF_STEP_F_STOP_ON_ADDRESS \| DBGF_STEP_F_STOP_ON_STACK_POP))
1683	{
1684	if ( (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_ON_ADDRESS)
1685	&& pVM->dbgf.s.SteppingFilter.AddrPc == CPUMGetGuestFlatPC(pVCpu))
1686	return true;
1687	if ( (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_ON_STACK_POP)
1688	&& CPUMGetGuestFlatSP(pVCpu) - pVM->dbgf.s.SteppingFilter.AddrStackPop
1689	< pVM->dbgf.s.SteppingFilter.cbStackPop)
1690	return true;
1691	}
1692
1693	/*
1694	* Do step-over filtering separate from the step-into one.
1695	*/
1696	if (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_OVER)
1697	{
1698	DBGFSTEPINSTRTYPE enmType = dbgfStepGetCurInstrType(pVM, pVCpu);
1699	switch (enmType)
1700	{
1701	default:
1702	if ( pVM->dbgf.s.SteppingFilter.uCallDepth != 0
1703	\|\| (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_FILTER_MASK))
1704	break;
1705	return true;
1706	case DBGFSTEPINSTRTYPE_CALL:
1707	if ( (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_ON_CALL)
1708	&& pVM->dbgf.s.SteppingFilter.uCallDepth == 0)
1709	return true;
1710	pVM->dbgf.s.SteppingFilter.uCallDepth++;
1711	break;
1712	case DBGFSTEPINSTRTYPE_RET:
1713	if (pVM->dbgf.s.SteppingFilter.uCallDepth == 0)
1714	{
1715	if (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_ON_RET)
1716	return true;
1717	/* If after return, we use the cMaxStep limit to stop the next time. */
1718	if (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_AFTER_RET)
1719	pVM->dbgf.s.SteppingFilter.cMaxSteps = pVM->dbgf.s.SteppingFilter.cSteps + 1;
1720	}
1721	else if (pVM->dbgf.s.SteppingFilter.uCallDepth > 0)
1722	pVM->dbgf.s.SteppingFilter.uCallDepth--;
1723	break;
1724	}
1725	return false;
1726	}
1727	/*
1728	* Filtered step-into.
1729	*/
1730	else if ( pVM->dbgf.s.SteppingFilter.fFlags
1731	& (DBGF_STEP_F_STOP_ON_CALL \| DBGF_STEP_F_STOP_ON_RET \| DBGF_STEP_F_STOP_AFTER_RET))
1732	{
1733	DBGFSTEPINSTRTYPE enmType = dbgfStepGetCurInstrType(pVM, pVCpu);
1734	switch (enmType)
1735	{
1736	default:
1737	break;
1738	case DBGFSTEPINSTRTYPE_CALL:
1739	if (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_ON_CALL)
1740	return true;
1741	break;
1742	case DBGFSTEPINSTRTYPE_RET:
1743	if (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_ON_RET)
1744	return true;
1745	/* If after return, we use the cMaxStep limit to stop the next time. */
1746	if (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_AFTER_RET)
1747	pVM->dbgf.s.SteppingFilter.cMaxSteps = pVM->dbgf.s.SteppingFilter.cSteps + 1;
1748	break;
1749	}
1750	return false;
1751	}
1752	}
1753	}
1754	}
1755
1756	return true;
1757	}
1758
1759
1760	/**
1761	* Step Into.
1762	*
1763	* A single step event is generated from this command.
1764	* The current implementation is not reliable, so don't rely on the event coming.
1765	*
1766	* @returns VBox status code.
1767	* @param pUVM The user mode VM handle.
1768	* @param idCpu The ID of the CPU to single step on.
1769	*/
1770	VMMR3DECL(int) DBGFR3Step(PUVM pUVM, VMCPUID idCpu)
1771	{
1772	return DBGFR3StepEx(pUVM, idCpu, DBGF_STEP_F_INTO, NULL, NULL, 0, 1);
1773	}
1774
1775
1776	/**
1777	* Full fleged step.
1778	*
1779	* This extended stepping API allows for doing multiple steps before raising an
1780	* event, helping implementing step over, step out and other more advanced
1781	* features.
1782	*
1783	* Like the DBGFR3Step() API, this will normally generate a DBGFEVENT_STEPPED or
1784	* DBGFEVENT_STEPPED_EVENT. However the stepping may be interrupted by other
1785	* events, which will abort the stepping.
1786	*
1787	* The stop on pop area feature is for safeguarding step out.
1788	*
1789	* Please note though, that it will always use stepping and never breakpoints.
1790	* While this allows for a much greater flexibility it can at times be rather
1791	* slow.
1792	*
1793	* @returns VBox status code.
1794	* @param pUVM The user mode VM handle.
1795	* @param idCpu The ID of the CPU to single step on.
1796	* @param fFlags Flags controlling the stepping, DBGF_STEP_F_XXX.
1797	* Either DBGF_STEP_F_INTO or DBGF_STEP_F_OVER must
1798	* always be specified.
1799	* @param pStopPcAddr Address to stop executing at. Completely ignored
1800	* unless DBGF_STEP_F_STOP_ON_ADDRESS is specified.
1801	* @param pStopPopAddr Stack address that SP must be lower than when
1802	* performing DBGF_STEP_F_STOP_ON_STACK_POP filtering.
1803	* @param cbStopPop The range starting at @a pStopPopAddr which is
1804	* considered to be within the same thread stack. Note
1805	* that the API allows @a pStopPopAddr and @a cbStopPop
1806	* to form an area that wraps around and it will
1807	* consider the part starting at 0 as included.
1808	* @param cMaxSteps The maximum number of steps to take. This is to
1809	* prevent stepping for ever, so passing UINT32_MAX is
1810	* not recommended.
1811	*
1812	* @remarks The two address arguments must be guest context virtual addresses,
1813	* or HMA. The code doesn't make much of a point of out HMA, though.
1814	*/
1815	VMMR3DECL(int) DBGFR3StepEx(PUVM pUVM, VMCPUID idCpu, uint32_t fFlags, PCDBGFADDRESS pStopPcAddr,
1816	PCDBGFADDRESS pStopPopAddr, RTGCUINTPTR cbStopPop, uint32_t cMaxSteps)
1817	{
1818	/*
1819	* Check state.
1820	*/
1821	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1822	PVM pVM = pUVM->pVM;
1823	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1824	AssertReturn(idCpu < pVM->cCpus, VERR_INVALID_PARAMETER);
1825	AssertReturn(!(fFlags & ~DBGF_STEP_F_VALID_MASK), VERR_INVALID_FLAGS);
1826	AssertReturn(RT_BOOL(fFlags & DBGF_STEP_F_INTO) != RT_BOOL(fFlags & DBGF_STEP_F_OVER), VERR_INVALID_FLAGS);
1827	if (fFlags & DBGF_STEP_F_STOP_ON_ADDRESS)
1828	{
1829	AssertReturn(RT_VALID_PTR(pStopPcAddr), VERR_INVALID_POINTER);
1830	AssertReturn(DBGFADDRESS_IS_VALID(pStopPcAddr), VERR_INVALID_PARAMETER);
1831	AssertReturn(DBGFADDRESS_IS_VIRT_GC(pStopPcAddr), VERR_INVALID_PARAMETER);
1832	}
1833	AssertReturn(!(fFlags & DBGF_STEP_F_STOP_ON_STACK_POP) \|\| RT_VALID_PTR(pStopPopAddr), VERR_INVALID_POINTER);
1834	if (fFlags & DBGF_STEP_F_STOP_ON_STACK_POP)
1835	{
1836	AssertReturn(RT_VALID_PTR(pStopPopAddr), VERR_INVALID_POINTER);
1837	AssertReturn(DBGFADDRESS_IS_VALID(pStopPopAddr), VERR_INVALID_PARAMETER);
1838	AssertReturn(DBGFADDRESS_IS_VIRT_GC(pStopPopAddr), VERR_INVALID_PARAMETER);
1839	AssertReturn(cbStopPop > 0, VERR_INVALID_PARAMETER);
1840	}
1841
1842	AssertReturn(pVM->dbgf.s.fAttached, VERR_DBGF_NOT_ATTACHED);
1843	PUVMCPU pUVCpu = &pUVM->aCpus[idCpu];
1844	if (RT_LIKELY(dbgfR3CpuIsHalted(pUVCpu)))
1845	{ /* likely */ }
1846	else
1847	return VERR_SEM_OUT_OF_TURN;
1848	Assert(pVM->dbgf.s.SteppingFilter.idCpu == NIL_VMCPUID);
1849
1850	/*
1851	* Send the emulation thread a single-step command.
1852	*/
1853	if (fFlags == DBGF_STEP_F_INTO)
1854	pVM->dbgf.s.SteppingFilter.idCpu = NIL_VMCPUID;
1855	else
1856	pVM->dbgf.s.SteppingFilter.idCpu = idCpu;
1857	pVM->dbgf.s.SteppingFilter.fFlags = fFlags;
1858	if (fFlags & DBGF_STEP_F_STOP_ON_ADDRESS)
1859	pVM->dbgf.s.SteppingFilter.AddrPc = pStopPcAddr->FlatPtr;
1860	else
1861	pVM->dbgf.s.SteppingFilter.AddrPc = 0;
1862	if (fFlags & DBGF_STEP_F_STOP_ON_STACK_POP)
1863	{
1864	pVM->dbgf.s.SteppingFilter.AddrStackPop = pStopPopAddr->FlatPtr;
1865	pVM->dbgf.s.SteppingFilter.cbStackPop = cbStopPop;
1866	}
1867	else
1868	{
1869	pVM->dbgf.s.SteppingFilter.AddrStackPop = 0;
1870	pVM->dbgf.s.SteppingFilter.cbStackPop = RTGCPTR_MAX;
1871	}
1872
1873	pVM->dbgf.s.SteppingFilter.cMaxSteps = cMaxSteps;
1874	pVM->dbgf.s.SteppingFilter.cSteps = 0;
1875	pVM->dbgf.s.SteppingFilter.uCallDepth = 0;
1876
1877	Assert(dbgfR3CpuIsHalted(pUVCpu));
1878	return dbgfR3CpuSetCmdAndNotify(pUVCpu, DBGFCMD_SINGLE_STEP);
1879	}
1880
1881
1882
1883	/**
1884	* dbgfR3EventConfigEx argument packet.
1885	*/
1886	typedef struct DBGFR3EVENTCONFIGEXARGS
1887	{
1888	PCDBGFEVENTCONFIG paConfigs;
1889	size_t cConfigs;
1890	int rc;
1891	} DBGFR3EVENTCONFIGEXARGS;
1892	/** Pointer to a dbgfR3EventConfigEx argument packet. */
1893	typedef DBGFR3EVENTCONFIGEXARGS *PDBGFR3EVENTCONFIGEXARGS;
1894
1895
1896	/**
1897	* @callback_method_impl{FNVMMEMTRENDEZVOUS, Worker for DBGFR3EventConfigEx.}
1898	*/
1899	static DECLCALLBACK(VBOXSTRICTRC) dbgfR3EventConfigEx(PVM pVM, PVMCPU pVCpu, void *pvUser)
1900	{
1901	if (pVCpu->idCpu == 0)
1902	{
1903	PDBGFR3EVENTCONFIGEXARGS pArgs = (PDBGFR3EVENTCONFIGEXARGS)pvUser;
1904	DBGFEVENTCONFIG volatile const *paConfigs = pArgs->paConfigs;
1905	size_t cConfigs = pArgs->cConfigs;
1906
1907	/*
1908	* Apply the changes.
1909	*/
1910	unsigned cChanges = 0;
1911	for (uint32_t i = 0; i < cConfigs; i++)
1912	{
1913	DBGFEVENTTYPE enmType = paConfigs[i].enmType;
1914	AssertReturn(enmType >= DBGFEVENT_FIRST_SELECTABLE && enmType < DBGFEVENT_END, VERR_INVALID_PARAMETER);
1915	if (paConfigs[i].fEnabled)
1916	cChanges += ASMAtomicBitTestAndSet(&pVM->dbgf.s.bmSelectedEvents, enmType) == false;
1917	else
1918	cChanges += ASMAtomicBitTestAndClear(&pVM->dbgf.s.bmSelectedEvents, enmType) == true;
1919	}
1920
1921	/*
1922	* Inform HM about changes.
1923	*/
1924	if (cChanges > 0)
1925	{
1926	if (HMIsEnabled(pVM))
1927	{
1928	HMR3NotifyDebugEventChanged(pVM);
1929	HMR3NotifyDebugEventChangedPerCpu(pVM, pVCpu);
1930	}
1931	else if (VM_IS_NEM_ENABLED(pVM))
1932	{
1933	NEMR3NotifyDebugEventChanged(pVM);
1934	NEMR3NotifyDebugEventChangedPerCpu(pVM, pVCpu);
1935	}
1936	}
1937	}
1938	else if (HMIsEnabled(pVM))
1939	HMR3NotifyDebugEventChangedPerCpu(pVM, pVCpu);
1940	else if (VM_IS_NEM_ENABLED(pVM))
1941	NEMR3NotifyDebugEventChangedPerCpu(pVM, pVCpu);
1942
1943	return VINF_SUCCESS;
1944	}
1945
1946
1947	/**
1948	* Configures (enables/disables) multiple selectable debug events.
1949	*
1950	* @returns VBox status code.
1951	* @param pUVM The user mode VM handle.
1952	* @param paConfigs The event to configure and their new state.
1953	* @param cConfigs Number of entries in @a paConfigs.
1954	*/
1955	VMMR3DECL(int) DBGFR3EventConfigEx(PUVM pUVM, PCDBGFEVENTCONFIG paConfigs, size_t cConfigs)
1956	{
1957	/*
1958	* Validate input.
1959	*/
1960	size_t i = cConfigs;
1961	while (i-- > 0)
1962	{
1963	AssertReturn(paConfigs[i].enmType >= DBGFEVENT_FIRST_SELECTABLE, VERR_INVALID_PARAMETER);
1964	AssertReturn(paConfigs[i].enmType < DBGFEVENT_END, VERR_INVALID_PARAMETER);
1965	}
1966	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1967	PVM pVM = pUVM->pVM;
1968	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1969
1970	/*
1971	* Apply the changes in EMT(0) and rendezvous with the other CPUs so they
1972	* can sync their data and execution with new debug state.
1973	*/
1974	DBGFR3EVENTCONFIGEXARGS Args = { paConfigs, cConfigs, VINF_SUCCESS };
1975	int rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ASCENDING \| VMMEMTRENDEZVOUS_FLAGS_PRIORITY,
1976	dbgfR3EventConfigEx, &Args);
1977	if (RT_SUCCESS(rc))
1978	rc = Args.rc;
1979	return rc;
1980	}
1981
1982
1983	/**
1984	* Enables or disables a selectable debug event.
1985	*
1986	* @returns VBox status code.
1987	* @param pUVM The user mode VM handle.
1988	* @param enmEvent The selectable debug event.
1989	* @param fEnabled The new state.
1990	*/
1991	VMMR3DECL(int) DBGFR3EventConfig(PUVM pUVM, DBGFEVENTTYPE enmEvent, bool fEnabled)
1992	{
1993	/*
1994	* Convert to an array call.
1995	*/
1996	DBGFEVENTCONFIG EvtCfg = { enmEvent, fEnabled };
1997	return DBGFR3EventConfigEx(pUVM, &EvtCfg, 1);
1998	}
1999
2000
2001	/**
2002	* Checks if the given selectable event is enabled.
2003	*
2004	* @returns true if enabled, false if not or invalid input.
2005	* @param pUVM The user mode VM handle.
2006	* @param enmEvent The selectable debug event.
2007	* @sa DBGFR3EventQuery
2008	*/
2009	VMMR3DECL(bool) DBGFR3EventIsEnabled(PUVM pUVM, DBGFEVENTTYPE enmEvent)
2010	{
2011	/*
2012	* Validate input.
2013	*/
2014	AssertReturn( enmEvent >= DBGFEVENT_HALT_DONE
2015	&& enmEvent < DBGFEVENT_END, false);
2016	Assert( enmEvent >= DBGFEVENT_FIRST_SELECTABLE
2017	\|\| enmEvent == DBGFEVENT_BREAKPOINT
2018	\|\| enmEvent == DBGFEVENT_BREAKPOINT_IO
2019	\|\| enmEvent == DBGFEVENT_BREAKPOINT_MMIO);
2020
2021	UVM_ASSERT_VALID_EXT_RETURN(pUVM, false);
2022	PVM pVM = pUVM->pVM;
2023	VM_ASSERT_VALID_EXT_RETURN(pVM, false);
2024
2025	/*
2026	* Check the event status.
2027	*/
2028	return ASMBitTest(&pVM->dbgf.s.bmSelectedEvents, enmEvent);
2029	}
2030
2031
2032	/**
2033	* Queries the status of a set of events.
2034	*
2035	* @returns VBox status code.
2036	* @param pUVM The user mode VM handle.
2037	* @param paConfigs The events to query and where to return the state.
2038	* @param cConfigs The number of elements in @a paConfigs.
2039	* @sa DBGFR3EventIsEnabled, DBGF_IS_EVENT_ENABLED
2040	*/
2041	VMMR3DECL(int) DBGFR3EventQuery(PUVM pUVM, PDBGFEVENTCONFIG paConfigs, size_t cConfigs)
2042	{
2043	/*
2044	* Validate input.
2045	*/
2046	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
2047	PVM pVM = pUVM->pVM;
2048	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
2049
2050	for (size_t i = 0; i < cConfigs; i++)
2051	{
2052	DBGFEVENTTYPE enmType = paConfigs[i].enmType;
2053	AssertReturn( enmType >= DBGFEVENT_HALT_DONE
2054	&& enmType < DBGFEVENT_END, VERR_INVALID_PARAMETER);
2055	Assert( enmType >= DBGFEVENT_FIRST_SELECTABLE
2056	\|\| enmType == DBGFEVENT_BREAKPOINT
2057	\|\| enmType == DBGFEVENT_BREAKPOINT_IO
2058	\|\| enmType == DBGFEVENT_BREAKPOINT_MMIO);
2059	paConfigs[i].fEnabled = ASMBitTest(&pVM->dbgf.s.bmSelectedEvents, paConfigs[i].enmType);
2060	}
2061
2062	return VINF_SUCCESS;
2063	}
2064
2065
2066	/**
2067	* dbgfR3InterruptConfigEx argument packet.
2068	*/
2069	typedef struct DBGFR3INTERRUPTCONFIGEXARGS
2070	{
2071	PCDBGFINTERRUPTCONFIG paConfigs;
2072	size_t cConfigs;
2073	int rc;
2074	} DBGFR3INTERRUPTCONFIGEXARGS;
2075	/** Pointer to a dbgfR3InterruptConfigEx argument packet. */
2076	typedef DBGFR3INTERRUPTCONFIGEXARGS *PDBGFR3INTERRUPTCONFIGEXARGS;
2077
2078	/**
2079	* @callback_method_impl{FNVMMEMTRENDEZVOUS,
2080	* Worker for DBGFR3InterruptConfigEx.}
2081	*/
2082	static DECLCALLBACK(VBOXSTRICTRC) dbgfR3InterruptConfigEx(PVM pVM, PVMCPU pVCpu, void *pvUser)
2083	{
2084	if (pVCpu->idCpu == 0)
2085	{
2086	PDBGFR3INTERRUPTCONFIGEXARGS pArgs = (PDBGFR3INTERRUPTCONFIGEXARGS)pvUser;
2087	PCDBGFINTERRUPTCONFIG paConfigs = pArgs->paConfigs;
2088	size_t cConfigs = pArgs->cConfigs;
2089
2090	/*
2091	* Apply the changes.
2092	*/
2093	bool fChanged = false;
2094	bool fThis;
2095	for (uint32_t i = 0; i < cConfigs; i++)
2096	{
2097	/*
2098	* Hardware interrupts.
2099	*/
2100	if (paConfigs[i].enmHardState == DBGFINTERRUPTSTATE_ENABLED)
2101	{
2102	fChanged \|= fThis = ASMAtomicBitTestAndSet(&pVM->dbgf.s.bmHardIntBreakpoints, paConfigs[i].iInterrupt) == false;
2103	if (fThis)
2104	{
2105	Assert(pVM->dbgf.s.cHardIntBreakpoints < 256);
2106	pVM->dbgf.s.cHardIntBreakpoints++;
2107	}
2108	}
2109	else if (paConfigs[i].enmHardState == DBGFINTERRUPTSTATE_DISABLED)
2110	{
2111	fChanged \|= fThis = ASMAtomicBitTestAndClear(&pVM->dbgf.s.bmHardIntBreakpoints, paConfigs[i].iInterrupt) == true;
2112	if (fThis)
2113	{
2114	Assert(pVM->dbgf.s.cHardIntBreakpoints > 0);
2115	pVM->dbgf.s.cHardIntBreakpoints--;
2116	}
2117	}
2118
2119	/*
2120	* Software interrupts.
2121	*/
2122	if (paConfigs[i].enmHardState == DBGFINTERRUPTSTATE_ENABLED)
2123	{
2124	fChanged \|= fThis = ASMAtomicBitTestAndSet(&pVM->dbgf.s.bmSoftIntBreakpoints, paConfigs[i].iInterrupt) == false;
2125	if (fThis)
2126	{
2127	Assert(pVM->dbgf.s.cSoftIntBreakpoints < 256);
2128	pVM->dbgf.s.cSoftIntBreakpoints++;
2129	}
2130	}
2131	else if (paConfigs[i].enmSoftState == DBGFINTERRUPTSTATE_DISABLED)
2132	{
2133	fChanged \|= fThis = ASMAtomicBitTestAndClear(&pVM->dbgf.s.bmSoftIntBreakpoints, paConfigs[i].iInterrupt) == true;
2134	if (fThis)
2135	{
2136	Assert(pVM->dbgf.s.cSoftIntBreakpoints > 0);
2137	pVM->dbgf.s.cSoftIntBreakpoints--;
2138	}
2139	}
2140	}
2141
2142	/*
2143	* Update the event bitmap entries.
2144	*/
2145	if (pVM->dbgf.s.cHardIntBreakpoints > 0)
2146	fChanged \|= ASMAtomicBitTestAndSet(&pVM->dbgf.s.bmSelectedEvents, DBGFEVENT_INTERRUPT_HARDWARE) == false;
2147	else
2148	fChanged \|= ASMAtomicBitTestAndClear(&pVM->dbgf.s.bmSelectedEvents, DBGFEVENT_INTERRUPT_HARDWARE) == true;
2149
2150	if (pVM->dbgf.s.cSoftIntBreakpoints > 0)
2151	fChanged \|= ASMAtomicBitTestAndSet(&pVM->dbgf.s.bmSelectedEvents, DBGFEVENT_INTERRUPT_SOFTWARE) == false;
2152	else
2153	fChanged \|= ASMAtomicBitTestAndClear(&pVM->dbgf.s.bmSelectedEvents, DBGFEVENT_INTERRUPT_SOFTWARE) == true;
2154
2155	/*
2156	* Inform HM about changes.
2157	*/
2158	if (fChanged)
2159	{
2160	if (HMIsEnabled(pVM))
2161	{
2162	HMR3NotifyDebugEventChanged(pVM);
2163	HMR3NotifyDebugEventChangedPerCpu(pVM, pVCpu);
2164	}
2165	else if (VM_IS_NEM_ENABLED(pVM))
2166	{
2167	NEMR3NotifyDebugEventChanged(pVM);
2168	NEMR3NotifyDebugEventChangedPerCpu(pVM, pVCpu);
2169	}
2170	}
2171	}
2172	else if (HMIsEnabled(pVM))
2173	HMR3NotifyDebugEventChangedPerCpu(pVM, pVCpu);
2174	else if (VM_IS_NEM_ENABLED(pVM))
2175	NEMR3NotifyDebugEventChangedPerCpu(pVM, pVCpu);
2176
2177	return VINF_SUCCESS;
2178	}
2179
2180
2181	/**
2182	* Changes
2183	*
2184	* @returns VBox status code.
2185	* @param pUVM The user mode VM handle.
2186	* @param paConfigs The events to query and where to return the state.
2187	* @param cConfigs The number of elements in @a paConfigs.
2188	* @sa DBGFR3InterruptConfigHardware, DBGFR3InterruptConfigSoftware
2189	*/
2190	VMMR3DECL(int) DBGFR3InterruptConfigEx(PUVM pUVM, PCDBGFINTERRUPTCONFIG paConfigs, size_t cConfigs)
2191	{
2192	/*
2193	* Validate input.
2194	*/
2195	size_t i = cConfigs;
2196	while (i-- > 0)
2197	{
2198	AssertReturn(paConfigs[i].enmHardState <= DBGFINTERRUPTSTATE_DONT_TOUCH, VERR_INVALID_PARAMETER);
2199	AssertReturn(paConfigs[i].enmSoftState <= DBGFINTERRUPTSTATE_DONT_TOUCH, VERR_INVALID_PARAMETER);
2200	}
2201
2202	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
2203	PVM pVM = pUVM->pVM;
2204	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
2205
2206	/*
2207	* Apply the changes in EMT(0) and rendezvous with the other CPUs so they
2208	* can sync their data and execution with new debug state.
2209	*/
2210	DBGFR3INTERRUPTCONFIGEXARGS Args = { paConfigs, cConfigs, VINF_SUCCESS };
2211	int rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ASCENDING \| VMMEMTRENDEZVOUS_FLAGS_PRIORITY,
2212	dbgfR3InterruptConfigEx, &Args);
2213	if (RT_SUCCESS(rc))
2214	rc = Args.rc;
2215	return rc;
2216	}
2217
2218
2219	/**
2220	* Configures interception of a hardware interrupt.
2221	*
2222	* @returns VBox status code.
2223	* @param pUVM The user mode VM handle.
2224	* @param iInterrupt The interrupt number.
2225	* @param fEnabled Whether interception is enabled or not.
2226	* @sa DBGFR3InterruptSoftwareConfig, DBGFR3InterruptConfigEx
2227	*/
2228	VMMR3DECL(int) DBGFR3InterruptHardwareConfig(PUVM pUVM, uint8_t iInterrupt, bool fEnabled)
2229	{
2230	/*
2231	* Convert to DBGFR3InterruptConfigEx call.
2232	*/
2233	DBGFINTERRUPTCONFIG IntCfg = { iInterrupt, (uint8_t)fEnabled, DBGFINTERRUPTSTATE_DONT_TOUCH };
2234	return DBGFR3InterruptConfigEx(pUVM, &IntCfg, 1);
2235	}
2236
2237
2238	/**
2239	* Configures interception of a software interrupt.
2240	*
2241	* @returns VBox status code.
2242	* @param pUVM The user mode VM handle.
2243	* @param iInterrupt The interrupt number.
2244	* @param fEnabled Whether interception is enabled or not.
2245	* @sa DBGFR3InterruptHardwareConfig, DBGFR3InterruptConfigEx
2246	*/
2247	VMMR3DECL(int) DBGFR3InterruptSoftwareConfig(PUVM pUVM, uint8_t iInterrupt, bool fEnabled)
2248	{
2249	/*
2250	* Convert to DBGFR3InterruptConfigEx call.
2251	*/
2252	DBGFINTERRUPTCONFIG IntCfg = { iInterrupt, DBGFINTERRUPTSTATE_DONT_TOUCH, (uint8_t)fEnabled };
2253	return DBGFR3InterruptConfigEx(pUVM, &IntCfg, 1);
2254	}
2255
2256
2257	/**
2258	* Checks whether interception is enabled for a hardware interrupt.
2259	*
2260	* @returns true if enabled, false if not or invalid input.
2261	* @param pUVM The user mode VM handle.
2262	* @param iInterrupt The interrupt number.
2263	* @sa DBGFR3InterruptSoftwareIsEnabled, DBGF_IS_HARDWARE_INT_ENABLED,
2264	* DBGF_IS_SOFTWARE_INT_ENABLED
2265	*/
2266	VMMR3DECL(int) DBGFR3InterruptHardwareIsEnabled(PUVM pUVM, uint8_t iInterrupt)
2267	{
2268	/*
2269	* Validate input.
2270	*/
2271	UVM_ASSERT_VALID_EXT_RETURN(pUVM, false);
2272	PVM pVM = pUVM->pVM;
2273	VM_ASSERT_VALID_EXT_RETURN(pVM, false);
2274
2275	/*
2276	* Check it.
2277	*/
2278	return ASMBitTest(&pVM->dbgf.s.bmHardIntBreakpoints, iInterrupt);
2279	}
2280
2281
2282	/**
2283	* Checks whether interception is enabled for a software interrupt.
2284	*
2285	* @returns true if enabled, false if not or invalid input.
2286	* @param pUVM The user mode VM handle.
2287	* @param iInterrupt The interrupt number.
2288	* @sa DBGFR3InterruptHardwareIsEnabled, DBGF_IS_SOFTWARE_INT_ENABLED,
2289	* DBGF_IS_HARDWARE_INT_ENABLED,
2290	*/
2291	VMMR3DECL(int) DBGFR3InterruptSoftwareIsEnabled(PUVM pUVM, uint8_t iInterrupt)
2292	{
2293	/*
2294	* Validate input.
2295	*/
2296	UVM_ASSERT_VALID_EXT_RETURN(pUVM, false);
2297	PVM pVM = pUVM->pVM;
2298	VM_ASSERT_VALID_EXT_RETURN(pVM, false);
2299
2300	/*
2301	* Check it.
2302	*/
2303	return ASMBitTest(&pVM->dbgf.s.bmSoftIntBreakpoints, iInterrupt);
2304	}
2305
2306
2307
2308	/**
2309	* Call this to single step programmatically.
2310	*
2311	* You must pass down the return code to the EM loop! That's
2312	* where the actual single stepping take place (at least in the
2313	* current implementation).
2314	*
2315	* @returns VINF_EM_DBG_STEP
2316	*
2317	* @param pVCpu The cross context virtual CPU structure.
2318	*
2319	* @thread VCpu EMT
2320	* @internal
2321	*/
2322	VMMR3_INT_DECL(int) DBGFR3PrgStep(PVMCPU pVCpu)
2323	{
2324	VMCPU_ASSERT_EMT(pVCpu);
2325
2326	pVCpu->dbgf.s.fSingleSteppingRaw = true;
2327	return VINF_EM_DBG_STEP;
2328	}
2329
2330
2331	/**
2332	* Inject an NMI into a running VM (only VCPU 0!)
2333	*
2334	* @returns VBox status code.
2335	* @param pUVM The user mode VM structure.
2336	* @param idCpu The ID of the CPU to inject the NMI on.
2337	*/
2338	VMMR3DECL(int) DBGFR3InjectNMI(PUVM pUVM, VMCPUID idCpu)
2339	{
2340	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
2341	PVM pVM = pUVM->pVM;
2342	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
2343	AssertReturn(idCpu < pVM->cCpus, VERR_INVALID_CPU_ID);
2344
2345	/** @todo Implement generic NMI injection. */
2346	/** @todo NEM: NMI injection */
2347	if (!HMIsEnabled(pVM))
2348	return VERR_NOT_SUP_BY_NEM;
2349
2350	VMCPU_FF_SET(pVM->apCpusR3[idCpu], VMCPU_FF_INTERRUPT_NMI);
2351	return VINF_SUCCESS;
2352	}
2353

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source: vbox/trunk/src/VBox/VMM/VMMR3/DBGF.cpp@ 97231

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