DBGF.cpp@ 86392

Last change on this file since 86392 was 86392, checked in by vboxsync, 4 years ago
VMM/tstSSM: Cleanup leak. [doxyfix] bugref:9841
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1	/* $Id: DBGF.cpp 86392 2020-10-01 16:21:36Z vboxsync $ */
2	/** @file
3	* DBGF - Debugger Facility.
4	*/
5
6	/*
7	* Copyright (C) 2006-2020 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	#include <VBox/vmm/em.h>
76	#include <VBox/vmm/hm.h>
77	#include <VBox/vmm/mm.h>
78	#include "DBGFInternal.h"
79	#include <VBox/vmm/vm.h>
80	#include <VBox/vmm/uvm.h>
81	#include <VBox/err.h>
82
83	#include <VBox/log.h>
84	#include <iprt/semaphore.h>
85	#include <iprt/thread.h>
86	#include <iprt/asm.h>
87	#include <iprt/time.h>
88	#include <iprt/assert.h>
89	#include <iprt/stream.h>
90	#include <iprt/env.h>
91
92
93	/*********************************************************************************************************************************
94	* Structures and Typedefs *
95	*********************************************************************************************************************************/
96	/**
97	* Instruction type returned by dbgfStepGetCurInstrType.
98	*/
99	typedef enum DBGFSTEPINSTRTYPE
100	{
101	DBGFSTEPINSTRTYPE_INVALID = 0,
102	DBGFSTEPINSTRTYPE_OTHER,
103	DBGFSTEPINSTRTYPE_RET,
104	DBGFSTEPINSTRTYPE_CALL,
105	DBGFSTEPINSTRTYPE_END,
106	DBGFSTEPINSTRTYPE_32BIT_HACK = 0x7fffffff
107	} DBGFSTEPINSTRTYPE;
108
109
110	/*********************************************************************************************************************************
111	* Internal Functions *
112	*********************************************************************************************************************************/
113	DECLINLINE(int) dbgfR3SendEventWait(PVM pVM, PVMCPU pVCpu, DBGFEVENTTYPE enmType, DBGFEVENTCTX enmCtx);
114	DECLINLINE(DBGFCMD) dbgfR3CpuGetCmd(PUVMCPU pUVCpu);
115	static int dbgfR3CpuWait(PVMCPU pVCpu);
116	static int dbgfR3CpuCmd(PVMCPU pVCpu, DBGFCMD enmCmd, PDBGFCMDDATA pCmdData, bool *pfResumeExecution);
117	static DBGFSTEPINSTRTYPE dbgfStepGetCurInstrType(PVM pVM, PVMCPU pVCpu);
118	static bool dbgfStepAreWeThereYet(PVM pVM, PVMCPU pVCpu);
119
120
121
122	/**
123	* Initializes the DBGF.
124	*
125	* @returns VBox status code.
126	* @param pVM The cross context VM structure.
127	*/
128	VMMR3_INT_DECL(int) DBGFR3Init(PVM pVM)
129	{
130	PUVM pUVM = pVM->pUVM;
131	AssertCompile(sizeof(pUVM->dbgf.s) <= sizeof(pUVM->dbgf.padding));
132	AssertCompile(sizeof(pUVM->aCpus[0].dbgf.s) <= sizeof(pUVM->aCpus[0].dbgf.padding));
133
134	pVM->dbgf.s.SteppingFilter.idCpu = NIL_VMCPUID;
135
136	/*
137	* The usual sideways mountain climbing style of init:
138	*/
139	int rc = dbgfR3InfoInit(pUVM); /* (First, initalizes the shared critical section.) */
140	if (RT_SUCCESS(rc))
141	{
142	rc = dbgfR3TraceInit(pVM);
143	if (RT_SUCCESS(rc))
144	{
145	rc = dbgfR3RegInit(pUVM);
146	if (RT_SUCCESS(rc))
147	{
148	rc = dbgfR3AsInit(pUVM);
149	if (RT_SUCCESS(rc))
150	{
151	rc = dbgfR3BpInit(pVM);
152	if (RT_SUCCESS(rc))
153	{
154	rc = dbgfR3OSInit(pUVM);
155	if (RT_SUCCESS(rc))
156	{
157	rc = dbgfR3PlugInInit(pUVM);
158	if (RT_SUCCESS(rc))
159	{
160	rc = dbgfR3BugCheckInit(pVM);
161	if (RT_SUCCESS(rc))
162	{
163	#ifdef VBOX_WITH_DBGF_TRACING
164	rc = dbgfR3TracerInit(pVM);
165	#endif
166	if (RT_SUCCESS(rc))
167	{
168	return VINF_SUCCESS;
169	}
170	}
171	dbgfR3PlugInTerm(pUVM);
172	}
173	dbgfR3OSTermPart1(pUVM);
174	dbgfR3OSTermPart2(pUVM);
175	}
176	}
177	dbgfR3AsTerm(pUVM);
178	}
179	dbgfR3RegTerm(pUVM);
180	}
181	dbgfR3TraceTerm(pVM);
182	}
183	dbgfR3InfoTerm(pUVM);
184	}
185	return rc;
186	}
187
188
189	/**
190	* Terminates and cleans up resources allocated by the DBGF.
191	*
192	* @returns VBox status code.
193	* @param pVM The cross context VM structure.
194	*/
195	VMMR3_INT_DECL(int) DBGFR3Term(PVM pVM)
196	{
197	PUVM pUVM = pVM->pUVM;
198
199	#ifdef VBOX_WITH_DBGF_TRACING
200	dbgfR3TracerTerm(pVM);
201	#endif
202	dbgfR3OSTermPart1(pUVM);
203	dbgfR3PlugInTerm(pUVM);
204	dbgfR3OSTermPart2(pUVM);
205	dbgfR3AsTerm(pUVM);
206	dbgfR3RegTerm(pUVM);
207	dbgfR3TraceTerm(pVM);
208	dbgfR3InfoTerm(pUVM);
209
210	return VINF_SUCCESS;
211	}
212
213
214	/**
215	* This is for tstCFGM and others to avoid trigger leak detection.
216	*
217	* @returns VBox status code.
218	* @param pUVM The user mode VM structure.
219	*/
220	VMMR3DECL(void) DBGFR3TermUVM(PUVM pUVM)
221	{
222	dbgfR3InfoTerm(pUVM);
223	}
224
225
226	/**
227	* Called when the VM is powered off to detach debuggers.
228	*
229	* @param pVM The cross context VM structure.
230	*/
231	VMMR3_INT_DECL(void) DBGFR3PowerOff(PVM pVM)
232	{
233	/*
234	* Send a termination event to any attached debugger.
235	*/
236	if (pVM->dbgf.s.fAttached)
237	{
238	PVMCPU pVCpu = VMMGetCpu(pVM);
239	int rc = dbgfR3SendEventWait(pVM, pVCpu, DBGFEVENT_POWERING_OFF, DBGFEVENTCTX_OTHER);
240	AssertLogRelRC(rc);
241
242	/*
243	* Clear the FF so we won't get confused later on.
244	*/
245	VM_FF_CLEAR(pVM, VM_FF_DBGF);
246	}
247	}
248
249
250	/**
251	* Applies relocations to data and code managed by this
252	* component. This function will be called at init and
253	* whenever the VMM need to relocate it self inside the GC.
254	*
255	* @param pVM The cross context VM structure.
256	* @param offDelta Relocation delta relative to old location.
257	*/
258	VMMR3_INT_DECL(void) DBGFR3Relocate(PVM pVM, RTGCINTPTR offDelta)
259	{
260	dbgfR3TraceRelocate(pVM);
261	dbgfR3AsRelocate(pVM->pUVM, offDelta);
262	}
263
264
265	/**
266	* Waits a little while for a debuggger to attach.
267	*
268	* @returns True is a debugger have attached.
269	* @param pVM The cross context VM structure.
270	* @param pVCpu The cross context per CPU structure.
271	* @param enmEvent Event.
272	*
273	* @thread EMT(pVCpu)
274	*/
275	bool dbgfR3WaitForAttach(PVM pVM, PVMCPU pVCpu, DBGFEVENTTYPE enmEvent)
276	{
277	/*
278	* First a message.
279	*/
280	#if !defined(DEBUG)
281	int cWait = 10;
282	#else
283	int cWait = !VM_IS_RAW_MODE_ENABLED(pVM)
284	&& ( enmEvent == DBGFEVENT_ASSERTION_HYPER
285	\|\| enmEvent == DBGFEVENT_FATAL_ERROR)
286	&& !RTEnvExist("VBOX_DBGF_WAIT_FOR_ATTACH")
287	? 10
288	: 150;
289	#endif
290	RTStrmPrintf(g_pStdErr, "DBGF: No debugger attached, waiting %d second%s for one to attach (event=%d)\n",
291	cWait / 10, cWait != 10 ? "s" : "", enmEvent);
292	RTStrmFlush(g_pStdErr);
293	while (cWait > 0)
294	{
295	RTThreadSleep(100);
296	if (pVM->dbgf.s.fAttached)
297	{
298	RTStrmPrintf(g_pStdErr, "Attached!\n");
299	RTStrmFlush(g_pStdErr);
300	return true;
301	}
302
303	/* Process rendezvous (debugger attaching involves such). */
304	if (VM_FF_IS_SET(pVM, VM_FF_EMT_RENDEZVOUS))
305	{
306	int rc = VMMR3EmtRendezvousFF(pVM, pVCpu); AssertRC(rc);
307	if (rc != VINF_SUCCESS)
308	{
309	/** @todo Ignoring these could be bad. */
310	RTStrmPrintf(g_pStdErr, "[rcRendezvous=%Rrc, ignored!]", rc);
311	RTStrmFlush(g_pStdErr);
312	}
313	}
314
315	/* Process priority stuff. */
316	if ( VM_FF_IS_SET(pVM, VM_FF_REQUEST)
317	\|\| VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_REQUEST))
318	{
319	int rc = VMR3ReqProcessU(pVM->pUVM, VMCPUID_ANY, true /fPriorityOnly/);
320	if (rc == VINF_SUCCESS)
321	rc = VMR3ReqProcessU(pVM->pUVM, pVCpu->idCpu, true /fPriorityOnly/);
322	if (rc != VINF_SUCCESS)
323	{
324	/** @todo Ignoring these could be bad. */
325	RTStrmPrintf(g_pStdErr, "[rcReq=%Rrc, ignored!]", rc);
326	RTStrmFlush(g_pStdErr);
327	}
328	}
329
330	/* next */
331	if (!(cWait % 10))
332	{
333	RTStrmPrintf(g_pStdErr, "%d.", cWait / 10);
334	RTStrmFlush(g_pStdErr);
335	}
336	cWait--;
337	}
338
339	RTStrmPrintf(g_pStdErr, "Stopping the VM!\n");
340	RTStrmFlush(g_pStdErr);
341	return false;
342	}
343
344
345	/**
346	* Forced action callback.
347	*
348	* The VMM will call this from it's main loop when either VM_FF_DBGF or
349	* VMCPU_FF_DBGF are set.
350	*
351	* The function checks for and executes pending commands from the debugger.
352	* Then it checks for pending debug events and serves these.
353	*
354	* @returns VINF_SUCCESS normally.
355	* @returns VERR_DBGF_RAISE_FATAL_ERROR to pretend a fatal error happened.
356	* @param pVM The cross context VM structure.
357	* @param pVCpu The cross context per CPU structure.
358	*/
359	VMMR3_INT_DECL(int) DBGFR3VMMForcedAction(PVM pVM, PVMCPU pVCpu)
360	{
361	VBOXSTRICTRC rcStrict = VINF_SUCCESS;
362
363	/*
364	* Dispatch pending events.
365	*/
366	if (VMCPU_FF_TEST_AND_CLEAR(pVCpu, VMCPU_FF_DBGF))
367	{
368	if ( pVCpu->dbgf.s.cEvents > 0
369	&& pVCpu->dbgf.s.aEvents[pVCpu->dbgf.s.cEvents - 1].enmState == DBGFEVENTSTATE_CURRENT)
370	{
371	rcStrict = DBGFR3EventHandlePending(pVM, pVCpu);
372	/** @todo may end up with VERR_DBGF_NOT_ATTACHED here, which will prove fatal... */
373	}
374
375	/*
376	* Command pending? Process it.
377	*/
378	PUVMCPU pUVCpu = pVCpu->pUVCpu;
379	if (pUVCpu->dbgf.s.enmDbgfCmd != DBGFCMD_NO_COMMAND)
380	{
381	bool fResumeExecution;
382	DBGFCMDDATA CmdData = pUVCpu->dbgf.s.DbgfCmdData;
383	DBGFCMD enmCmd = dbgfR3CpuGetCmd(pUVCpu);
384	VBOXSTRICTRC rcStrict2 = dbgfR3CpuCmd(pVCpu, enmCmd, &CmdData, &fResumeExecution);
385	if (!fResumeExecution)
386	rcStrict2 = dbgfR3CpuWait(pVCpu);
387	if ( rcStrict2 != VINF_SUCCESS
388	&& ( rcStrict == VINF_SUCCESS
389	\|\| RT_FAILURE(rcStrict2)
390	\|\| rcStrict2 < rcStrict) ) /** @todo oversimplified? */
391	rcStrict = rcStrict2;
392	}
393	}
394
395	return VBOXSTRICTRC_TODO(rcStrict);
396	}
397
398
399	/**
400	* Try to determine the event context.
401	*
402	* @returns debug event context.
403	* @param pVCpu The cross context vCPU structure.
404	*/
405	static DBGFEVENTCTX dbgfR3FigureEventCtx(PVMCPU pVCpu)
406	{
407	switch (EMGetState(pVCpu))
408	{
409	case EMSTATE_HM:
410	case EMSTATE_NEM:
411	case EMSTATE_DEBUG_GUEST_HM:
412	case EMSTATE_DEBUG_GUEST_NEM:
413	return DBGFEVENTCTX_HM;
414
415	case EMSTATE_IEM:
416	case EMSTATE_RAW:
417	case EMSTATE_IEM_THEN_REM:
418	case EMSTATE_DEBUG_GUEST_IEM:
419	case EMSTATE_DEBUG_GUEST_RAW:
420	return DBGFEVENTCTX_RAW;
421
422
423	case EMSTATE_REM:
424	case EMSTATE_DEBUG_GUEST_REM:
425	return DBGFEVENTCTX_REM;
426
427	case EMSTATE_DEBUG_HYPER:
428	case EMSTATE_GURU_MEDITATION:
429	return DBGFEVENTCTX_HYPER;
430
431	default:
432	return DBGFEVENTCTX_OTHER;
433	}
434	}
435
436
437	/**
438	* Sends the event to the debugger (i.e. adds it to the event ring buffer).
439	*
440	* @returns VBox status code.
441	* @param pVM The cross context VM structure.
442	* @param pVCpu The CPU sending the event.
443	* @param enmType The event type to send.
444	* @param enmCtx The event context, DBGFEVENTCTX_INVALID will be resolved.
445	* @param pvPayload Event payload (DBGFEVENT::u data), optional.
446	* @param cbPayload The size of the event payload, optional.
447	*/
448	static int dbgfR3SendEventWorker(PVM pVM, PVMCPU pVCpu, DBGFEVENTTYPE enmType, DBGFEVENTCTX enmCtx,
449	void const *pvPayload, size_t cbPayload)
450	{
451	PUVM pUVM = pVM->pUVM;
452	pVM->dbgf.s.SteppingFilter.idCpu = NIL_VMCPUID; /** @todo per vCPU stepping filter. */
453
454	/*
455	* Massage the input a little.
456	*/
457	AssertStmt(cbPayload <= RT_SIZEOFMEMB(DBGFEVENT, u), cbPayload = RT_SIZEOFMEMB(DBGFEVENT, u));
458	if (enmCtx == DBGFEVENTCTX_INVALID)
459	enmCtx = dbgfR3FigureEventCtx(pVCpu);
460
461	/*
462	* Put the event into the ring buffer.
463	*/
464	RTSemFastMutexRequest(pUVM->dbgf.s.hMtxDbgEvtWr);
465
466	uint32_t const cDbgEvtMax = RT_MAX(1, pUVM->dbgf.s.cDbgEvtMax);
467	uint32_t const idxDbgEvtWrite = ASMAtomicReadU32(&pUVM->dbgf.s.idxDbgEvtWrite);
468	uint32_t const idxDbgEvtRead = ASMAtomicReadU32(&pUVM->dbgf.s.idxDbgEvtRead);
469	/** @todo Handle full buffer. */ RT_NOREF(idxDbgEvtRead);
470
471	PDBGFEVENT pEvent = &pUVM->dbgf.s.paDbgEvts[idxDbgEvtWrite % cDbgEvtMax];
472
473	#ifdef DEBUG
474	ASMMemFill32(pEvent, sizeof(*pEvent), UINT32_C(0xdeadbeef));
475	#endif
476	pEvent->enmType = enmType;
477	pEvent->enmCtx = enmCtx;
478	pEvent->idCpu = pVCpu->idCpu;
479	pEvent->uReserved = 0;
480	if (cbPayload)
481	memcpy(&pEvent->u, pvPayload, cbPayload);
482
483	ASMAtomicWriteU32(&pUVM->dbgf.s.idxDbgEvtWrite, (idxDbgEvtWrite + 1) % cDbgEvtMax);
484
485	RTSemFastMutexRelease(pUVM->dbgf.s.hMtxDbgEvtWr);
486
487	/*
488	* Signal the debugger.
489	*/
490	return RTSemEventSignal(pUVM->dbgf.s.hEvtWait);
491	}
492
493
494	/**
495	* Send event and wait for the debugger to respond.
496	*
497	* @returns Strict VBox status code.
498	* @param pVM The cross context VM structure.
499	* @param pVCpu The CPU sending the event.
500	* @param enmType The event type to send.
501	* @param enmCtx The event context, DBGFEVENTCTX_INVALID will be resolved.
502	*/
503	DECLINLINE(int) dbgfR3SendEventWait(PVM pVM, PVMCPU pVCpu, DBGFEVENTTYPE enmType, DBGFEVENTCTX enmCtx)
504	{
505	int rc = dbgfR3SendEventWorker(pVM, pVCpu, enmType, enmCtx, NULL, 0);
506	if (RT_SUCCESS(rc))
507	rc = dbgfR3CpuWait(pVCpu);
508	return rc;
509	}
510
511
512	/**
513	* Send event and wait for the debugger to respond, extended version.
514	*
515	* @returns Strict VBox status code.
516	* @param pVM The cross context VM structure.
517	* @param pVCpu The CPU sending the event.
518	* @param enmType The event type to send.
519	* @param enmCtx The event context, DBGFEVENTCTX_INVALID will be resolved.
520	* @param pvPayload Event payload (DBGFEVENT::u data), optional.
521	* @param cbPayload The size of the event payload, optional.
522	*/
523	DECLINLINE(int) dbgfR3SendEventWaitEx(PVM pVM, PVMCPU pVCpu, DBGFEVENTTYPE enmType, DBGFEVENTCTX enmCtx,
524	void const *pvPayload, size_t cbPayload)
525	{
526	int rc = dbgfR3SendEventWorker(pVM, pVCpu, enmType, enmCtx, pvPayload, cbPayload);
527	if (RT_SUCCESS(rc))
528	rc = dbgfR3CpuWait(pVCpu);
529	return rc;
530	}
531
532
533	/**
534	* Send event but do NOT wait for the debugger.
535	*
536	* Currently only used by dbgfR3CpuCmd().
537	*
538	* @param pVM The cross context VM structure.
539	* @param pVCpu The CPU sending the event.
540	* @param enmType The event type to send.
541	* @param enmCtx The event context, DBGFEVENTCTX_INVALID will be resolved.
542	*/
543	DECLINLINE(int) dbgfR3SendEventNoWait(PVM pVM, PVMCPU pVCpu, DBGFEVENTTYPE enmType, DBGFEVENTCTX enmCtx)
544	{
545	return dbgfR3SendEventWorker(pVM, pVCpu, enmType, enmCtx, NULL, 0);
546	}
547
548
549	/**
550	* The common event prologue code.
551	*
552	* It will make sure someone is attached, and perhaps process any high priority
553	* pending actions (none yet).
554	*
555	* @returns VBox status code.
556	* @param pVM The cross context VM structure.
557	* @param pVCpu The vCPU cross context structure.
558	* @param enmEvent The event to be sent.
559	*/
560	static int dbgfR3EventPrologue(PVM pVM, PVMCPU pVCpu, DBGFEVENTTYPE enmEvent)
561	{
562	/*
563	* Check if a debugger is attached.
564	*/
565	if ( !pVM->dbgf.s.fAttached
566	&& !dbgfR3WaitForAttach(pVM, pVCpu, enmEvent))
567	{
568	Log(("dbgfR3EventPrologue: enmEvent=%d - debugger not attached\n", enmEvent));
569	return VERR_DBGF_NOT_ATTACHED;
570	}
571
572	/*
573	* Look thru pending commands and finish those which make sense now.
574	*/
575	/** @todo Process/purge pending commands. */
576	//int rc = DBGFR3VMMForcedAction(pVM);
577	return VINF_SUCCESS;
578	}
579
580
581	/**
582	* Processes a pending event on the current CPU.
583	*
584	* This is called by EM in response to VINF_EM_DBG_EVENT.
585	*
586	* @returns Strict VBox status code.
587	* @param pVM The cross context VM structure.
588	* @param pVCpu The cross context per CPU structure.
589	*
590	* @thread EMT(pVCpu)
591	*/
592	VMMR3_INT_DECL(VBOXSTRICTRC) DBGFR3EventHandlePending(PVM pVM, PVMCPU pVCpu)
593	{
594	VMCPU_ASSERT_EMT(pVCpu);
595	VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_DBGF);
596
597	/*
598	* Check that we've got an event first.
599	*/
600	AssertReturn(pVCpu->dbgf.s.cEvents > 0, VINF_SUCCESS);
601	AssertReturn(pVCpu->dbgf.s.aEvents[pVCpu->dbgf.s.cEvents - 1].enmState == DBGFEVENTSTATE_CURRENT, VINF_SUCCESS);
602	PDBGFEVENT pEvent = &pVCpu->dbgf.s.aEvents[pVCpu->dbgf.s.cEvents - 1].Event;
603
604	/*
605	* Make sure we've got a debugger and is allowed to speak to it.
606	*/
607	int rc = dbgfR3EventPrologue(pVM, pVCpu, pEvent->enmType);
608	if (RT_FAILURE(rc))
609	{
610	/** @todo drop them events? */
611	return rc; /** @todo this will cause trouble if we're here via an FF! */
612	}
613
614	/*
615	* Send the event and mark it as ignore.
616	* ASSUMES no new events get generate while dbgfR3CpuWait is executing!
617	*/
618	VBOXSTRICTRC rcStrict = dbgfR3SendEventWaitEx(pVM, pVCpu, pEvent->enmType, pEvent->enmCtx, &pEvent->u, sizeof(pEvent->u));
619	pVCpu->dbgf.s.aEvents[pVCpu->dbgf.s.cEvents - 1].enmState = DBGFEVENTSTATE_IGNORE;
620	return rcStrict;
621	}
622
623
624	/**
625	* Send a generic debugger event which takes no data.
626	*
627	* @returns VBox status code.
628	* @param pVM The cross context VM structure.
629	* @param enmEvent The event to send.
630	* @internal
631	*/
632	VMMR3DECL(int) DBGFR3Event(PVM pVM, DBGFEVENTTYPE enmEvent)
633	{
634	PVMCPU pVCpu = VMMGetCpu(pVM);
635	AssertReturn(pVCpu, VERR_VM_THREAD_NOT_EMT);
636
637	/*
638	* Do stepping filtering.
639	*/
640	/** @todo Would be better if we did some of this inside the execution
641	* engines. */
642	if ( enmEvent == DBGFEVENT_STEPPED
643	\|\| enmEvent == DBGFEVENT_STEPPED_HYPER)
644	{
645	if (!dbgfStepAreWeThereYet(pVM, pVCpu))
646	return VINF_EM_DBG_STEP;
647	}
648
649	int rc = dbgfR3EventPrologue(pVM, pVCpu, enmEvent);
650	if (RT_FAILURE(rc))
651	return rc;
652
653	/*
654	* Send the event and process the reply communication.
655	*/
656	return dbgfR3SendEventWait(pVM, pVCpu, enmEvent, DBGFEVENTCTX_INVALID);
657	}
658
659
660	/**
661	* Send a debugger event which takes the full source file location.
662	*
663	* @returns VBox status code.
664	* @param pVM The cross context VM structure.
665	* @param enmEvent The event to send.
666	* @param pszFile Source file.
667	* @param uLine Line number in source file.
668	* @param pszFunction Function name.
669	* @param pszFormat Message which accompanies the event.
670	* @param ... Message arguments.
671	* @internal
672	*/
673	VMMR3DECL(int) DBGFR3EventSrc(PVM pVM, DBGFEVENTTYPE enmEvent, const char pszFile, unsigned uLine, const char pszFunction, const char *pszFormat, ...)
674	{
675	va_list args;
676	va_start(args, pszFormat);
677	int rc = DBGFR3EventSrcV(pVM, enmEvent, pszFile, uLine, pszFunction, pszFormat, args);
678	va_end(args);
679	return rc;
680	}
681
682
683	/**
684	* Send a debugger event which takes the full source file location.
685	*
686	* @returns VBox status code.
687	* @param pVM The cross context VM structure.
688	* @param enmEvent The event to send.
689	* @param pszFile Source file.
690	* @param uLine Line number in source file.
691	* @param pszFunction Function name.
692	* @param pszFormat Message which accompanies the event.
693	* @param args Message arguments.
694	* @internal
695	*/
696	VMMR3DECL(int) DBGFR3EventSrcV(PVM pVM, DBGFEVENTTYPE enmEvent, const char pszFile, unsigned uLine, const char pszFunction, const char *pszFormat, va_list args)
697	{
698	PVMCPU pVCpu = VMMGetCpu(pVM);
699	AssertReturn(pVCpu, VERR_VM_THREAD_NOT_EMT);
700
701	int rc = dbgfR3EventPrologue(pVM, pVCpu, enmEvent);
702	if (RT_FAILURE(rc))
703	return rc;
704
705	/*
706	* Format the message.
707	*/
708	char *pszMessage = NULL;
709	char szMessage[8192];
710	if (pszFormat && *pszFormat)
711	{
712	pszMessage = &szMessage[0];
713	RTStrPrintfV(szMessage, sizeof(szMessage), pszFormat, args);
714	}
715
716	/*
717	* Send the event and process the reply communication.
718	*/
719	DBGFEVENT DbgEvent; /** @todo split up DBGFEVENT so we can skip the dead wait on the stack? */
720	DbgEvent.u.Src.pszFile = pszFile;
721	DbgEvent.u.Src.uLine = uLine;
722	DbgEvent.u.Src.pszFunction = pszFunction;
723	DbgEvent.u.Src.pszMessage = pszMessage;
724	return dbgfR3SendEventWaitEx(pVM, pVCpu, enmEvent, DBGFEVENTCTX_INVALID, &DbgEvent.u, sizeof(DbgEvent.u.Src));
725	}
726
727
728	/**
729	* Send a debugger event which takes the two assertion messages.
730	*
731	* @returns VBox status code.
732	* @param pVM The cross context VM structure.
733	* @param enmEvent The event to send.
734	* @param pszMsg1 First assertion message.
735	* @param pszMsg2 Second assertion message.
736	*/
737	VMMR3_INT_DECL(int) DBGFR3EventAssertion(PVM pVM, DBGFEVENTTYPE enmEvent, const char pszMsg1, const char pszMsg2)
738	{
739	PVMCPU pVCpu = VMMGetCpu(pVM);
740	AssertReturn(pVCpu, VERR_VM_THREAD_NOT_EMT);
741
742	int rc = dbgfR3EventPrologue(pVM, pVCpu, enmEvent);
743	if (RT_FAILURE(rc))
744	return rc;
745
746	/*
747	* Send the event and process the reply communication.
748	*/
749	DBGFEVENT DbgEvent;
750	DbgEvent.u.Assert.pszMsg1 = pszMsg1;
751	DbgEvent.u.Assert.pszMsg2 = pszMsg2;
752	return dbgfR3SendEventWaitEx(pVM, pVCpu, enmEvent, DBGFEVENTCTX_INVALID, &DbgEvent.u, sizeof(DbgEvent.u.Assert));
753	}
754
755
756	/**
757	* Breakpoint was hit somewhere.
758	* Figure out which breakpoint it is and notify the debugger.
759	*
760	* @returns VBox status code.
761	* @param pVM The cross context VM structure.
762	* @param enmEvent DBGFEVENT_BREAKPOINT_HYPER or DBGFEVENT_BREAKPOINT.
763	*/
764	VMMR3_INT_DECL(int) DBGFR3EventBreakpoint(PVM pVM, DBGFEVENTTYPE enmEvent)
765	{
766	PVMCPU pVCpu = VMMGetCpu(pVM);
767	AssertReturn(pVCpu, VERR_VM_THREAD_NOT_EMT);
768
769	int rc = dbgfR3EventPrologue(pVM, pVCpu, enmEvent);
770	if (RT_FAILURE(rc))
771	return rc;
772
773	/*
774	* Send the event and process the reply communication.
775	*/
776	DBGFEVENT DbgEvent;
777	RTUINT iBp = DbgEvent.u.Bp.iBp = pVCpu->dbgf.s.iActiveBp;
778	pVCpu->dbgf.s.iActiveBp = ~0U;
779	if (iBp != ~0U)
780	{
781	DbgEvent.enmCtx = DBGFEVENTCTX_RAW;
782	return dbgfR3SendEventWaitEx(pVM, pVCpu, enmEvent, DBGFEVENTCTX_RAW, &DbgEvent.u, sizeof(DbgEvent.u.Bp));
783	}
784
785	AssertFailed(); /** @todo this should be obsolete now... */
786
787	/* REM breakpoints has be been searched for. */
788	#if 0 /** @todo get flat PC api! */
789	uint32_t eip = CPUMGetGuestEIP(pVM);
790	#else
791	PCPUMCTX pCtx = CPUMQueryGuestCtxPtr(pVCpu);
792	RTGCPTR eip = pCtx->rip + pCtx->cs.u64Base;
793	#endif
794	for (size_t i = 0; i < RT_ELEMENTS(pVM->dbgf.s.aBreakpoints); i++)
795	if ( pVM->dbgf.s.aBreakpoints[i].enmType == DBGFBPTYPE_REM
796	&& pVM->dbgf.s.aBreakpoints[i].u.Rem.GCPtr == eip)
797	{
798	DbgEvent.u.Bp.iBp = pVM->dbgf.s.aBreakpoints[i].iBp;
799	break;
800	}
801	AssertMsg(DbgEvent.u.Bp.iBp != ~0U, ("eip=%08x\n", eip));
802	return dbgfR3SendEventWaitEx(pVM, pVCpu, enmEvent, DBGFEVENTCTX_REM, &DbgEvent.u, sizeof(DbgEvent.u.Bp));
803	}
804
805
806	/**
807	* Returns whether the given vCPU is waiting for the debugger.
808	*
809	* @returns Flags whether the vCPU is currently waiting for the debugger.
810	* @param pUVCpu The user mode vCPU structure.
811	*/
812	DECLINLINE(bool) dbgfR3CpuIsHalted(PUVMCPU pUVCpu)
813	{
814	return ASMAtomicReadBool(&pUVCpu->dbgf.s.fStopped);
815	}
816
817
818	/**
819	* Checks whether the given vCPU is waiting in the debugger.
820	*
821	* @returns Flag whether the indicated vCPU is halted, when VMCPUID_ALL
822	* is given true is returned when at least one vCPU is halted.
823	* @param pUVM The user mode VM structure.
824	* @param idCpu The CPU ID to check, VMCPUID_ALL to check all vCPUs.
825	*/
826	DECLINLINE(bool) dbgfR3CpuAreAnyHaltedByCpuId(PUVM pUVM, VMCPUID idCpu)
827	{
828	AssertReturn(idCpu < pUVM->cCpus \|\| idCpu == VMCPUID_ALL, false);
829
830	/* Check that either the given vCPU or all are actually halted. */
831	if (idCpu != VMCPUID_ALL)
832	return dbgfR3CpuIsHalted(&pUVM->aCpus[idCpu]);
833
834	for (VMCPUID i = 0; i < pUVM->cCpus; i++)
835	if (dbgfR3CpuIsHalted(&pUVM->aCpus[i]))
836	return true;
837	return false;
838	}
839
840
841	/**
842	* Gets the pending debug command for this EMT/CPU, replacing it with
843	* DBGFCMD_NO_COMMAND.
844	*
845	* @returns Pending command.
846	* @param pUVCpu The user mode virtual CPU structure.
847	* @thread EMT(pUVCpu)
848	*/
849	DECLINLINE(DBGFCMD) dbgfR3CpuGetCmd(PUVMCPU pUVCpu)
850	{
851	DBGFCMD enmCmd = (DBGFCMD)ASMAtomicXchgU32((uint32_t volatile )(void )&pUVCpu->dbgf.s.enmDbgfCmd, DBGFCMD_NO_COMMAND);
852	Log2(("DBGF: Getting command: %d\n", enmCmd));
853	return enmCmd;
854	}
855
856
857	/**
858	* Send a debug command to a CPU, making sure to notify it.
859	*
860	* @returns VBox status code.
861	* @param pUVCpu The user mode virtual CPU structure.
862	* @param enmCmd The command to submit to the CPU.
863	*/
864	DECLINLINE(int) dbgfR3CpuSetCmdAndNotify(PUVMCPU pUVCpu, DBGFCMD enmCmd)
865	{
866	Log2(("DBGF: Setting command to %d\n", enmCmd));
867	Assert(enmCmd != DBGFCMD_NO_COMMAND);
868	AssertMsg(pUVCpu->dbgf.s.enmDbgfCmd == DBGFCMD_NO_COMMAND, ("enmCmd=%d enmDbgfCmd=%d\n", enmCmd, pUVCpu->dbgf.s.enmDbgfCmd));
869
870	ASMAtomicWriteU32((uint32_t volatile )(void )&pUVCpu->dbgf.s.enmDbgfCmd, enmCmd);
871	VMCPU_FF_SET(pUVCpu->pVCpu, VMCPU_FF_DBGF);
872
873	VMR3NotifyCpuFFU(pUVCpu, 0 /fFlags/);
874	return VINF_SUCCESS;
875	}
876
877
878	/**
879	* Waits for the debugger to respond.
880	*
881	* @returns VBox status code. (clearify)
882	* @param pVCpu The cross context vCPU structure.
883	*/
884	static int dbgfR3CpuWait(PVMCPU pVCpu)
885	{
886	PVM pVM = pVCpu->CTX_SUFF(pVM);
887	PUVMCPU pUVCpu = pVCpu->pUVCpu;
888
889	LogFlow(("dbgfR3CpuWait:\n"));
890	int rcRet = VINF_SUCCESS;
891
892	ASMAtomicWriteBool(&pUVCpu->dbgf.s.fStopped, true);
893
894	/*
895	* Waits for the debugger to reply (i.e. issue an command).
896	*/
897	for (;;)
898	{
899	/*
900	* Wait.
901	*/
902	for (;;)
903	{
904	/*
905	* Process forced flags before we go sleep.
906	*/
907	if ( VMCPU_FF_IS_ANY_SET(pVCpu, VMCPU_FF_DBGF \| VMCPU_FF_REQUEST)
908	\|\| VM_FF_IS_ANY_SET(pVM, VM_FF_EMT_RENDEZVOUS \| VMCPU_FF_REQUEST \| VM_FF_CHECK_VM_STATE))
909	{
910	if (VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_DBGF))
911	break;
912
913	int rc;
914	if (VM_FF_IS_SET(pVM, VM_FF_EMT_RENDEZVOUS))
915	rc = VMMR3EmtRendezvousFF(pVM, pVCpu);
916	else if ( VM_FF_IS_SET(pVM, VM_FF_REQUEST)
917	\|\| VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_REQUEST))
918	{
919	LogFlow(("dbgfR3CpuWait: Processes requests...\n"));
920	rc = VMR3ReqProcessU(pVM->pUVM, VMCPUID_ANY, false /fPriorityOnly/);
921	if (rc == VINF_SUCCESS)
922	rc = VMR3ReqProcessU(pVM->pUVM, pVCpu->idCpu, false /fPriorityOnly/);
923	LogFlow(("dbgfR3CpuWait: VMR3ReqProcess -> %Rrc rcRet=%Rrc\n", rc, rcRet));
924	}
925	else if (VM_FF_IS_SET(pVM, VM_FF_CHECK_VM_STATE))
926	{
927	VMSTATE enmState = VMR3GetState(pVM);
928	switch (enmState)
929	{
930	case VMSTATE_FATAL_ERROR:
931	case VMSTATE_FATAL_ERROR_LS:
932	case VMSTATE_GURU_MEDITATION:
933	case VMSTATE_GURU_MEDITATION_LS:
934	rc = VINF_EM_SUSPEND;
935	break;
936	case VMSTATE_DESTROYING:
937	rc = VINF_EM_TERMINATE;
938	break;
939	default:
940	rc = VERR_DBGF_IPE_1;
941	AssertMsgFailed(("%s\n", VMGetStateName(enmState)));
942	}
943	}
944	else
945	rc = VINF_SUCCESS;
946	if (rc >= VINF_EM_FIRST && rc <= VINF_EM_LAST)
947	{
948	switch (rc)
949	{
950	case VINF_EM_DBG_BREAKPOINT:
951	case VINF_EM_DBG_STEPPED:
952	case VINF_EM_DBG_STEP:
953	case VINF_EM_DBG_STOP:
954	case VINF_EM_DBG_EVENT:
955	AssertMsgFailed(("rc=%Rrc\n", rc));
956	break;
957
958	/* return straight away */
959	case VINF_EM_TERMINATE:
960	case VINF_EM_OFF:
961	LogFlow(("dbgfR3CpuWait: returns %Rrc\n", rc));
962	ASMAtomicWriteBool(&pUVCpu->dbgf.s.fStopped, false);
963	return rc;
964
965	/* remember return code. */
966	default:
967	AssertReleaseMsgFailed(("rc=%Rrc is not in the switch!\n", rc));
968	RT_FALL_THRU();
969	case VINF_EM_RESET:
970	case VINF_EM_SUSPEND:
971	case VINF_EM_HALT:
972	case VINF_EM_RESUME:
973	case VINF_EM_RESCHEDULE:
974	case VINF_EM_RESCHEDULE_REM:
975	case VINF_EM_RESCHEDULE_RAW:
976	if (rc < rcRet \|\| rcRet == VINF_SUCCESS)
977	rcRet = rc;
978	break;
979	}
980	}
981	else if (RT_FAILURE(rc))
982	{
983	LogFlow(("dbgfR3CpuWait: returns %Rrc\n", rc));
984	ASMAtomicWriteBool(&pUVCpu->dbgf.s.fStopped, false);
985	return rc;
986	}
987	}
988	else if (pVM->dbgf.s.fAttached)
989	{
990	int rc = VMR3WaitU(pUVCpu);
991	if (RT_FAILURE(rc))
992	{
993	LogFlow(("dbgfR3CpuWait: returns %Rrc (VMR3WaitU)\n", rc));
994	ASMAtomicWriteBool(&pUVCpu->dbgf.s.fStopped, false);
995	return rc;
996	}
997	}
998	else
999	{
1000	LogFlow(("dbgfR3CpuWait: Debugger detached, continuing normal execution (%Rrc)\n", rcRet));
1001	ASMAtomicWriteBool(&pUVCpu->dbgf.s.fStopped, false);
1002	return rcRet;
1003	}
1004	}
1005
1006	/*
1007	* Process the command.
1008	*/
1009	VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_DBGF);
1010	bool fResumeExecution;
1011	DBGFCMDDATA CmdData = pUVCpu->dbgf.s.DbgfCmdData;
1012	DBGFCMD enmCmd = dbgfR3CpuGetCmd(pUVCpu);
1013	int rc = dbgfR3CpuCmd(pVCpu, enmCmd, &CmdData, &fResumeExecution);
1014	if (fResumeExecution)
1015	{
1016	if (RT_FAILURE(rc))
1017	rcRet = rc;
1018	else if ( rc >= VINF_EM_FIRST
1019	&& rc <= VINF_EM_LAST
1020	&& (rc < rcRet \|\| rcRet == VINF_SUCCESS))
1021	rcRet = rc;
1022	LogFlow(("dbgfR3CpuWait: returns %Rrc\n", rcRet));
1023	ASMAtomicWriteBool(&pUVCpu->dbgf.s.fStopped, false);
1024	return rcRet;
1025	}
1026	}
1027	}
1028
1029
1030	/**
1031	* Executes command from debugger.
1032	*
1033	* The caller is responsible for waiting or resuming execution based on the
1034	* value returned in the *pfResumeExecution indicator.
1035	*
1036	* @returns VBox status code. (clearify!)
1037	* @param pVCpu The cross context vCPU structure.
1038	* @param enmCmd The command in question.
1039	* @param pCmdData Pointer to the command data.
1040	* @param pfResumeExecution Where to store the resume execution / continue waiting indicator.
1041	*/
1042	static int dbgfR3CpuCmd(PVMCPU pVCpu, DBGFCMD enmCmd, PDBGFCMDDATA pCmdData, bool *pfResumeExecution)
1043	{
1044	RT_NOREF(pCmdData); /* for later */
1045
1046	/*
1047	* The cases in this switch returns directly if no event to send.
1048	*/
1049	DBGFEVENTTYPE enmEvent;
1050	DBGFEVENTCTX enmCtx = DBGFEVENTCTX_INVALID;
1051	switch (enmCmd)
1052	{
1053	/*
1054	* Halt is answered by an event say that we've halted.
1055	*/
1056	case DBGFCMD_HALT:
1057	{
1058	*pfResumeExecution = false;
1059	enmEvent = DBGFEVENT_HALT_DONE;
1060	break;
1061	}
1062
1063
1064	/*
1065	* Resume is not answered, we just resume execution.
1066	*/
1067	case DBGFCMD_GO:
1068	{
1069	pVCpu->dbgf.s.fSingleSteppingRaw = false;
1070	*pfResumeExecution = true;
1071	return VINF_SUCCESS;
1072	}
1073
1074	/** @todo implement (and define) the rest of the commands. */
1075
1076	/*
1077	* Single step, with trace into.
1078	*/
1079	case DBGFCMD_SINGLE_STEP:
1080	{
1081	Log2(("Single step\n"));
1082	PVM pVM = pVCpu->CTX_SUFF(pVM);
1083	if (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_OVER)
1084	{
1085	if (dbgfStepGetCurInstrType(pVM, pVCpu) == DBGFSTEPINSTRTYPE_CALL)
1086	pVM->dbgf.s.SteppingFilter.uCallDepth++;
1087	}
1088	if (pVM->dbgf.s.SteppingFilter.cMaxSteps > 0)
1089	{
1090	pVCpu->dbgf.s.fSingleSteppingRaw = true;
1091	*pfResumeExecution = true;
1092	return VINF_EM_DBG_STEP;
1093	}
1094	/* Stop after zero steps. Nonsense, but whatever. */
1095	pVM->dbgf.s.SteppingFilter.idCpu = NIL_VMCPUID;
1096	*pfResumeExecution = false;
1097	enmCtx = dbgfR3FigureEventCtx(pVCpu);
1098	enmEvent = enmCtx != DBGFEVENTCTX_HYPER ? DBGFEVENT_STEPPED : DBGFEVENT_STEPPED_HYPER;
1099	break;
1100	}
1101
1102	/*
1103	* Default is to send an invalid command event.
1104	*/
1105	default:
1106	{
1107	*pfResumeExecution = false;
1108	enmEvent = DBGFEVENT_INVALID_COMMAND;
1109	break;
1110	}
1111	}
1112
1113	/*
1114	* Send the pending event.
1115	*/
1116	Log2(("DBGF: Emulation thread: sending event %d\n", enmEvent));
1117	int rc = dbgfR3SendEventNoWait(pVCpu->CTX_SUFF(pVM), pVCpu, enmEvent, enmCtx);
1118	AssertRCStmt(rc, *pfResumeExecution = true);
1119	return rc;
1120	}
1121
1122
1123	/**
1124	* @callback_method_impl{FNVMMEMTRENDEZVOUS,
1125	* EMT rendezvous worker for DBGFR3Attach - only called on one EMT.}
1126	*/
1127	static DECLCALLBACK(VBOXSTRICTRC) dbgfR3Attach(PVM pVM, PVMCPU pVCpu, void *pvUser)
1128	{
1129	PUVM pUVM = pVM->pUVM;
1130	int prcAttach = (int )pvUser;
1131	RT_NOREF(pVCpu);
1132
1133	if (pVM->dbgf.s.fAttached)
1134	{
1135	Log(("dbgfR3Attach: Debugger already attached\n"));
1136	*prcAttach = VERR_DBGF_ALREADY_ATTACHED;
1137	return VINF_SUCCESS;
1138	}
1139
1140	/*
1141	* The per-CPU bits.
1142	*/
1143	for (uint32_t i = 0; i < pUVM->cCpus; i++)
1144	{
1145	PUVMCPU pUVCpu = &pUVM->aCpus[i];
1146
1147	pUVCpu->dbgf.s.enmDbgfCmd = DBGFCMD_NO_COMMAND;
1148	RT_ZERO(pUVCpu->dbgf.s.DbgfCmdData);
1149	}
1150
1151	/*
1152	* Init of the VM -> Debugger communication part living in the global VM structure.
1153	*/
1154	pUVM->dbgf.s.cDbgEvtMax = pVM->cCpus * 5 + 10; /* Initial size of event ring, increased when being full. */
1155	pUVM->dbgf.s.idxDbgEvtWrite = 0;
1156	pUVM->dbgf.s.idxDbgEvtRead = 0;
1157	pUVM->dbgf.s.hEvtWait = NIL_RTSEMEVENT;
1158	pUVM->dbgf.s.hEvtRingBufFull = NIL_RTSEMEVENTMULTI;
1159	pUVM->dbgf.s.hMtxDbgEvtWr = NIL_RTSEMFASTMUTEX;
1160	int rc;
1161	pUVM->dbgf.s.paDbgEvts = (PDBGFEVENT)MMR3HeapAllocU(pUVM, MM_TAG_DBGF, pUVM->dbgf.s.cDbgEvtMax * sizeof(DBGFEVENT));
1162	if (pUVM->dbgf.s.paDbgEvts)
1163	{
1164	rc = RTSemEventCreate(&pUVM->dbgf.s.hEvtWait);
1165	if (RT_SUCCESS(rc))
1166	{
1167	rc = RTSemFastMutexCreate(&pUVM->dbgf.s.hMtxDbgEvtWr);
1168	if (RT_SUCCESS(rc))
1169	{
1170	rc = RTSemEventMultiCreate(&pUVM->dbgf.s.hEvtRingBufFull);
1171	if (RT_SUCCESS(rc))
1172	{
1173	/*
1174	* At last, set the attached flag.
1175	*/
1176	ASMAtomicWriteBool(&pVM->dbgf.s.fAttached, true);
1177	*prcAttach = VINF_SUCCESS;
1178	return VINF_SUCCESS;
1179	}
1180
1181	RTSemFastMutexDestroy(pUVM->dbgf.s.hMtxDbgEvtWr);
1182	pUVM->dbgf.s.hMtxDbgEvtWr = NIL_RTSEMFASTMUTEX;
1183	}
1184	RTSemEventDestroy(pUVM->dbgf.s.hEvtWait);
1185	pUVM->dbgf.s.hEvtWait = NIL_RTSEMEVENT;
1186	}
1187	}
1188	else
1189	rc = VERR_NO_MEMORY;
1190
1191	*prcAttach = rc;
1192	return VINF_SUCCESS;
1193	}
1194
1195
1196	/**
1197	* Attaches a debugger to the specified VM.
1198	*
1199	* Only one debugger at a time.
1200	*
1201	* @returns VBox status code.
1202	* @param pUVM The user mode VM handle.
1203	*/
1204	VMMR3DECL(int) DBGFR3Attach(PUVM pUVM)
1205	{
1206	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1207	PVM pVM = pUVM->pVM;
1208	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1209
1210	/*
1211	* Call the VM, use EMT rendezvous for serialization.
1212	*/
1213	int rcAttach = VERR_IPE_UNINITIALIZED_STATUS;
1214	int rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE \| VMMEMTRENDEZVOUS_FLAGS_PRIORITY, dbgfR3Attach, &rcAttach);
1215	if (RT_SUCCESS(rc))
1216	rc = rcAttach;
1217
1218	return rc;
1219	}
1220
1221
1222	/**
1223	* @callback_method_impl{FNVMMEMTRENDEZVOUS,
1224	* EMT rendezvous worker for DBGFR3Detach - called on all EMTs (why?).}
1225	*/
1226	static DECLCALLBACK(VBOXSTRICTRC) dbgfR3Detach(PVM pVM, PVMCPU pVCpu, void *pvUser)
1227	{
1228	if (pVCpu->idCpu == 0)
1229	{
1230	PUVM pUVM = (PUVM)pvUser;
1231
1232	/*
1233	* Per-CPU cleanup.
1234	*/
1235	for (VMCPUID i = 0; i < pUVM->cCpus; i++)
1236	{
1237	PUVMCPU pUVCpu = &pUVM->aCpus[i];
1238
1239	pUVCpu->dbgf.s.enmDbgfCmd = DBGFCMD_NO_COMMAND;
1240	RT_ZERO(pUVCpu->dbgf.s.DbgfCmdData);
1241	}
1242
1243	/*
1244	* De-init of the VM -> Debugger communication part living in the global VM structure.
1245	*/
1246	if (pUVM->dbgf.s.paDbgEvts)
1247	{
1248	MMR3HeapFree(pUVM->dbgf.s.paDbgEvts);
1249	pUVM->dbgf.s.paDbgEvts = NULL;
1250	}
1251
1252	if (pUVM->dbgf.s.hEvtWait != NIL_RTSEMEVENT)
1253	{
1254	RTSemEventDestroy(pUVM->dbgf.s.hEvtWait);
1255	pUVM->dbgf.s.hEvtWait = NIL_RTSEMEVENT;
1256	}
1257
1258	if (pUVM->dbgf.s.hMtxDbgEvtWr != NIL_RTSEMFASTMUTEX)
1259	{
1260	RTSemFastMutexDestroy(pUVM->dbgf.s.hMtxDbgEvtWr);
1261	pUVM->dbgf.s.hMtxDbgEvtWr = NIL_RTSEMFASTMUTEX;
1262	}
1263
1264	if (pUVM->dbgf.s.hEvtRingBufFull != NIL_RTSEMEVENTMULTI)
1265	{
1266	RTSemEventMultiDestroy(pUVM->dbgf.s.hEvtRingBufFull);
1267	pUVM->dbgf.s.hEvtRingBufFull = NIL_RTSEMEVENTMULTI;
1268	}
1269
1270	pUVM->dbgf.s.cDbgEvtMax = 0;
1271	pUVM->dbgf.s.idxDbgEvtWrite = 0;
1272	pUVM->dbgf.s.idxDbgEvtRead = 0;
1273	pUVM->dbgf.s.hEvtWait = NIL_RTSEMEVENT;
1274	pUVM->dbgf.s.hEvtRingBufFull = NIL_RTSEMEVENTMULTI;
1275	pUVM->dbgf.s.hMtxDbgEvtWr = NIL_RTSEMFASTMUTEX;
1276
1277	ASMAtomicWriteBool(&pVM->dbgf.s.fAttached, false);
1278	}
1279
1280	return VINF_SUCCESS;
1281	}
1282
1283
1284	/**
1285	* Detaches a debugger from the specified VM.
1286	*
1287	* Caller must be attached to the VM.
1288	*
1289	* @returns VBox status code.
1290	* @param pUVM The user mode VM handle.
1291	*/
1292	VMMR3DECL(int) DBGFR3Detach(PUVM pUVM)
1293	{
1294	LogFlow(("DBGFR3Detach:\n"));
1295
1296	/*
1297	* Validate input. The UVM handle shall be valid, the VM handle might be
1298	* in the processes of being destroyed already, so deal quietly with that.
1299	*/
1300	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1301	PVM pVM = pUVM->pVM;
1302	if (!VM_IS_VALID_EXT(pVM))
1303	return VERR_INVALID_VM_HANDLE;
1304
1305	/*
1306	* Check if attached.
1307	*/
1308	if (!pVM->dbgf.s.fAttached)
1309	return VERR_DBGF_NOT_ATTACHED;
1310
1311	return VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ALL_AT_ONCE \| VMMEMTRENDEZVOUS_FLAGS_PRIORITY, dbgfR3Detach, pUVM);
1312	}
1313
1314
1315	/**
1316	* Wait for a debug event.
1317	*
1318	* @returns VBox status code. Will not return VBOX_INTERRUPTED.
1319	* @param pUVM The user mode VM handle.
1320	* @param cMillies Number of millis to wait.
1321	* @param pEvent Where to store the event data.
1322	*/
1323	VMMR3DECL(int) DBGFR3EventWait(PUVM pUVM, RTMSINTERVAL cMillies, PDBGFEVENT pEvent)
1324	{
1325	/*
1326	* Check state.
1327	*/
1328	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1329	PVM pVM = pUVM->pVM;
1330	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1331	AssertReturn(pVM->dbgf.s.fAttached, VERR_DBGF_NOT_ATTACHED);
1332
1333	RT_BZERO(pEvent, sizeof(*pEvent));
1334
1335	/*
1336	* Wait for an event to arrive if there are none.
1337	*/
1338	int rc = VINF_SUCCESS;
1339	uint32_t idxDbgEvtRead = ASMAtomicReadU32(&pUVM->dbgf.s.idxDbgEvtRead);
1340	if (idxDbgEvtRead == ASMAtomicReadU32(&pUVM->dbgf.s.idxDbgEvtWrite))
1341	{
1342	do
1343	{
1344	rc = RTSemEventWait(pUVM->dbgf.s.hEvtWait, cMillies);
1345	} while ( RT_SUCCESS(rc)
1346	&& idxDbgEvtRead == ASMAtomicReadU32(&pUVM->dbgf.s.idxDbgEvtWrite));
1347	}
1348
1349	if (RT_SUCCESS(rc))
1350	{
1351	Assert(idxDbgEvtRead != ASMAtomicReadU32(&pUVM->dbgf.s.idxDbgEvtWrite));
1352
1353	uint32_t const cDbgEvtMax = RT_MAX(1, pUVM->dbgf.s.cDbgEvtMax);
1354	memcpy(pEvent, &pUVM->dbgf.s.paDbgEvts[idxDbgEvtRead % cDbgEvtMax], sizeof(*pEvent));
1355	ASMAtomicWriteU32(&pUVM->dbgf.s.idxDbgEvtRead, (idxDbgEvtRead + 1) % cDbgEvtMax);
1356	}
1357
1358	Log2(("DBGFR3EventWait: rc=%Rrc (event type %d)\n", rc, pEvent->enmType));
1359	return rc;
1360	}
1361
1362
1363	/**
1364	* Halts VM execution.
1365	*
1366	* After calling this the VM isn't actually halted till an DBGFEVENT_HALT_DONE
1367	* arrives. Until that time it's not possible to issue any new commands.
1368	*
1369	* @returns VBox status code.
1370	* @retval VWRN_DBGF_ALREADY_HALTED if @a idCpu is VMCPUID_ALL and all vCPUs
1371	* are halted.
1372	* @param pUVM The user mode VM handle.
1373	* @param idCpu The vCPU to halt, VMCPUID_ALL halts all still running vCPUs.
1374	*/
1375	VMMR3DECL(int) DBGFR3Halt(PUVM pUVM, VMCPUID idCpu)
1376	{
1377	/*
1378	* Check state.
1379	*/
1380	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1381	PVM pVM = pUVM->pVM;
1382	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1383	AssertReturn(pVM->dbgf.s.fAttached, VERR_DBGF_NOT_ATTACHED);
1384	AssertReturn(idCpu == VMCPUID_ALL \|\| idCpu < pVM->cCpus, VERR_INVALID_CPU_ID);
1385
1386	/*
1387	* Halt the requested CPUs as needed.
1388	*/
1389	int rc;
1390	if (idCpu != VMCPUID_ALL)
1391	{
1392	PUVMCPU pUVCpu = &pUVM->aCpus[idCpu];
1393	if (!dbgfR3CpuIsHalted(pUVCpu))
1394	{
1395	dbgfR3CpuSetCmdAndNotify(pUVCpu, DBGFCMD_HALT);
1396	rc = VINF_SUCCESS;
1397	}
1398	else
1399	rc = VWRN_DBGF_ALREADY_HALTED;
1400	}
1401	else
1402	{
1403	rc = VWRN_DBGF_ALREADY_HALTED;
1404	for (VMCPUID i = 0; i < pUVM->cCpus; i++)
1405	{
1406	PUVMCPU pUVCpu = &pUVM->aCpus[i];
1407	if (!dbgfR3CpuIsHalted(pUVCpu))
1408	{
1409	dbgfR3CpuSetCmdAndNotify(pUVCpu, DBGFCMD_HALT);
1410	rc = VINF_SUCCESS;
1411	}
1412	}
1413	}
1414
1415	return rc;
1416	}
1417
1418
1419	/**
1420	* Checks if any of the specified vCPUs have been halted by the debugger.
1421	*
1422	* @returns True if at least one halted vCPUs.
1423	* @returns False if no halted vCPUs.
1424	* @param pUVM The user mode VM handle.
1425	* @param idCpu The CPU id to check for, VMCPUID_ALL will return true if
1426	* at least a single vCPU is halted in the debugger.
1427	*/
1428	VMMR3DECL(bool) DBGFR3IsHalted(PUVM pUVM, VMCPUID idCpu)
1429	{
1430	UVM_ASSERT_VALID_EXT_RETURN(pUVM, false);
1431	PVM pVM = pUVM->pVM;
1432	VM_ASSERT_VALID_EXT_RETURN(pVM, false);
1433	AssertReturn(pVM->dbgf.s.fAttached, false);
1434
1435	return dbgfR3CpuAreAnyHaltedByCpuId(pUVM, idCpu);
1436	}
1437
1438
1439	/**
1440	* Checks if the debugger can wait for events or not.
1441	*
1442	* This function is only used by lazy, multiplexing debuggers. :-)
1443	*
1444	* @returns VBox status code.
1445	* @retval VINF_SUCCESS if waitable.
1446	* @retval VERR_SEM_OUT_OF_TURN if not waitable.
1447	* @retval VERR_INVALID_VM_HANDLE if the VM is being (/ has been) destroyed
1448	* (not asserted) or if the handle is invalid (asserted).
1449	* @retval VERR_DBGF_NOT_ATTACHED if not attached.
1450	*
1451	* @param pUVM The user mode VM handle.
1452	*/
1453	VMMR3DECL(int) DBGFR3QueryWaitable(PUVM pUVM)
1454	{
1455	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1456
1457	/* Note! There is a slight race here, unfortunately. */
1458	PVM pVM = pUVM->pVM;
1459	if (!RT_VALID_PTR(pVM))
1460	return VERR_INVALID_VM_HANDLE;
1461	if (pVM->enmVMState >= VMSTATE_DESTROYING)
1462	return VERR_INVALID_VM_HANDLE;
1463	if (!pVM->dbgf.s.fAttached)
1464	return VERR_DBGF_NOT_ATTACHED;
1465
1466	/** @todo was: if (!RTSemPongShouldWait(...)) return VERR_SEM_OUT_OF_TURN; */
1467	return VINF_SUCCESS;
1468	}
1469
1470
1471	/**
1472	* Resumes VM execution.
1473	*
1474	* There is no receipt event on this command.
1475	*
1476	* @returns VBox status code.
1477	* @retval VWRN_DBGF_ALREADY_RUNNING if the specified vCPUs are all running.
1478	* @param pUVM The user mode VM handle.
1479	* @param idCpu The vCPU to resume, VMCPUID_ALL resumes all still halted vCPUs.
1480	*/
1481	VMMR3DECL(int) DBGFR3Resume(PUVM pUVM, VMCPUID idCpu)
1482	{
1483	/*
1484	* Validate input and attachment state.
1485	*/
1486	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1487	PVM pVM = pUVM->pVM;
1488	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1489	AssertReturn(pVM->dbgf.s.fAttached, VERR_DBGF_NOT_ATTACHED);
1490
1491	/*
1492	* Ping the halted emulation threads, telling them to run.
1493	*/
1494	int rc = VWRN_DBGF_ALREADY_RUNNING;
1495	if (idCpu != VMCPUID_ALL)
1496	{
1497	PUVMCPU pUVCpu = &pUVM->aCpus[idCpu];
1498	if (dbgfR3CpuIsHalted(pUVCpu))
1499	{
1500	rc = dbgfR3CpuSetCmdAndNotify(pUVCpu, DBGFCMD_GO);
1501	AssertRC(rc);
1502	}
1503	}
1504	else
1505	{
1506	for (VMCPUID i = 0; i < pUVM->cCpus; i++)
1507	{
1508	PUVMCPU pUVCpu = &pUVM->aCpus[i];
1509	if (dbgfR3CpuIsHalted(pUVCpu))
1510	{
1511	int rc2 = dbgfR3CpuSetCmdAndNotify(pUVCpu, DBGFCMD_GO);
1512	AssertRC(rc2);
1513	if (rc == VWRN_DBGF_ALREADY_RUNNING \|\| RT_FAILURE(rc2))
1514	rc = rc2;
1515	}
1516	}
1517	}
1518
1519	return rc;
1520	}
1521
1522
1523	/**
1524	* Classifies the current instruction.
1525	*
1526	* @returns Type of instruction.
1527	* @param pVM The cross context VM structure.
1528	* @param pVCpu The current CPU.
1529	* @thread EMT(pVCpu)
1530	*/
1531	static DBGFSTEPINSTRTYPE dbgfStepGetCurInstrType(PVM pVM, PVMCPU pVCpu)
1532	{
1533	/*
1534	* Read the instruction.
1535	*/
1536	size_t cbRead = 0;
1537	uint8_t abOpcode[16] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
1538	int rc = PGMR3DbgReadGCPtr(pVM, abOpcode, CPUMGetGuestFlatPC(pVCpu), sizeof(abOpcode) - 1, 0 /fFlags/, &cbRead);
1539	if (RT_SUCCESS(rc))
1540	{
1541	/*
1542	* Do minimal parsing. No real need to involve the disassembler here.
1543	*/
1544	uint8_t *pb = abOpcode;
1545	for (;;)
1546	{
1547	switch (*pb++)
1548	{
1549	default:
1550	return DBGFSTEPINSTRTYPE_OTHER;
1551
1552	case 0xe8: /* call rel16/32 */
1553	case 0x9a: /* call farptr */
1554	case 0xcc: /* int3 */
1555	case 0xcd: /* int xx */
1556	// case 0xce: /* into */
1557	return DBGFSTEPINSTRTYPE_CALL;
1558
1559	case 0xc2: /* ret xx */
1560	case 0xc3: /* ret */
1561	case 0xca: /* retf xx */
1562	case 0xcb: /* retf */
1563	case 0xcf: /* iret */
1564	return DBGFSTEPINSTRTYPE_RET;
1565
1566	case 0xff:
1567	if ( ((pb >> X86_MODRM_REG_SHIFT) & X86_MODRM_REG_SMASK) == 2 / call indir */
1568	\|\| ((pb >> X86_MODRM_REG_SHIFT) & X86_MODRM_REG_SMASK) == 3) / call indir-farptr */
1569	return DBGFSTEPINSTRTYPE_CALL;
1570	return DBGFSTEPINSTRTYPE_OTHER;
1571
1572	case 0x0f:
1573	switch (*pb++)
1574	{
1575	case 0x05: /* syscall */
1576	case 0x34: /* sysenter */
1577	return DBGFSTEPINSTRTYPE_CALL;
1578	case 0x07: /* sysret */
1579	case 0x35: /* sysexit */
1580	return DBGFSTEPINSTRTYPE_RET;
1581	}
1582	break;
1583
1584	/* Must handle some REX prefixes. So we do all normal prefixes. */
1585	case 0x40: case 0x41: case 0x42: case 0x43: case 0x44: case 0x45: case 0x46: case 0x47:
1586	case 0x48: case 0x49: case 0x4a: case 0x4b: case 0x4c: case 0x4d: case 0x4e: case 0x4f:
1587	if (!CPUMIsGuestIn64BitCode(pVCpu))
1588	return DBGFSTEPINSTRTYPE_OTHER;
1589	break;
1590
1591	case 0x2e: /* CS */
1592	case 0x36: /* SS */
1593	case 0x3e: /* DS */
1594	case 0x26: /* ES */
1595	case 0x64: /* FS */
1596	case 0x65: /* GS */
1597	case 0x66: /* op size */
1598	case 0x67: /* addr size */
1599	case 0xf0: /* lock */
1600	case 0xf2: /* REPNZ */
1601	case 0xf3: /* REPZ */
1602	break;
1603	}
1604	}
1605	}
1606
1607	return DBGFSTEPINSTRTYPE_INVALID;
1608	}
1609
1610
1611	/**
1612	* Checks if the stepping has reached a stop point.
1613	*
1614	* Called when raising a stepped event.
1615	*
1616	* @returns true if the event should be raised, false if we should take one more
1617	* step first.
1618	* @param pVM The cross context VM structure.
1619	* @param pVCpu The cross context per CPU structure of the calling EMT.
1620	* @thread EMT(pVCpu)
1621	*/
1622	static bool dbgfStepAreWeThereYet(PVM pVM, PVMCPU pVCpu)
1623	{
1624	/*
1625	* Check valid pVCpu and that it matches the CPU one stepping.
1626	*/
1627	if (pVCpu)
1628	{
1629	if (pVCpu->idCpu == pVM->dbgf.s.SteppingFilter.idCpu)
1630	{
1631	/*
1632	* Increase the number of steps and see if we've reached the max.
1633	*/
1634	pVM->dbgf.s.SteppingFilter.cSteps++;
1635	if (pVM->dbgf.s.SteppingFilter.cSteps < pVM->dbgf.s.SteppingFilter.cMaxSteps)
1636	{
1637	/*
1638	* Check PC and SP address filtering.
1639	*/
1640	if (pVM->dbgf.s.SteppingFilter.fFlags & (DBGF_STEP_F_STOP_ON_ADDRESS \| DBGF_STEP_F_STOP_ON_STACK_POP))
1641	{
1642	if ( (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_ON_ADDRESS)
1643	&& pVM->dbgf.s.SteppingFilter.AddrPc == CPUMGetGuestFlatPC(pVCpu))
1644	return true;
1645	if ( (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_ON_STACK_POP)
1646	&& CPUMGetGuestFlatSP(pVCpu) - pVM->dbgf.s.SteppingFilter.AddrStackPop
1647	< pVM->dbgf.s.SteppingFilter.cbStackPop)
1648	return true;
1649	}
1650
1651	/*
1652	* Do step-over filtering separate from the step-into one.
1653	*/
1654	if (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_OVER)
1655	{
1656	DBGFSTEPINSTRTYPE enmType = dbgfStepGetCurInstrType(pVM, pVCpu);
1657	switch (enmType)
1658	{
1659	default:
1660	if ( pVM->dbgf.s.SteppingFilter.uCallDepth != 0
1661	\|\| (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_FILTER_MASK))
1662	break;
1663	return true;
1664	case DBGFSTEPINSTRTYPE_CALL:
1665	if ( (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_ON_CALL)
1666	&& pVM->dbgf.s.SteppingFilter.uCallDepth == 0)
1667	return true;
1668	pVM->dbgf.s.SteppingFilter.uCallDepth++;
1669	break;
1670	case DBGFSTEPINSTRTYPE_RET:
1671	if (pVM->dbgf.s.SteppingFilter.uCallDepth == 0)
1672	{
1673	if (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_ON_RET)
1674	return true;
1675	/* If after return, we use the cMaxStep limit to stop the next time. */
1676	if (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_AFTER_RET)
1677	pVM->dbgf.s.SteppingFilter.cMaxSteps = pVM->dbgf.s.SteppingFilter.cSteps + 1;
1678	}
1679	else if (pVM->dbgf.s.SteppingFilter.uCallDepth > 0)
1680	pVM->dbgf.s.SteppingFilter.uCallDepth--;
1681	break;
1682	}
1683	return false;
1684	}
1685	/*
1686	* Filtered step-into.
1687	*/
1688	else if ( pVM->dbgf.s.SteppingFilter.fFlags
1689	& (DBGF_STEP_F_STOP_ON_CALL \| DBGF_STEP_F_STOP_ON_RET \| DBGF_STEP_F_STOP_AFTER_RET))
1690	{
1691	DBGFSTEPINSTRTYPE enmType = dbgfStepGetCurInstrType(pVM, pVCpu);
1692	switch (enmType)
1693	{
1694	default:
1695	break;
1696	case DBGFSTEPINSTRTYPE_CALL:
1697	if (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_ON_CALL)
1698	return true;
1699	break;
1700	case DBGFSTEPINSTRTYPE_RET:
1701	if (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_ON_RET)
1702	return true;
1703	/* If after return, we use the cMaxStep limit to stop the next time. */
1704	if (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_AFTER_RET)
1705	pVM->dbgf.s.SteppingFilter.cMaxSteps = pVM->dbgf.s.SteppingFilter.cSteps + 1;
1706	break;
1707	}
1708	return false;
1709	}
1710	}
1711	}
1712	}
1713
1714	return true;
1715	}
1716
1717
1718	/**
1719	* Step Into.
1720	*
1721	* A single step event is generated from this command.
1722	* The current implementation is not reliable, so don't rely on the event coming.
1723	*
1724	* @returns VBox status code.
1725	* @param pUVM The user mode VM handle.
1726	* @param idCpu The ID of the CPU to single step on.
1727	*/
1728	VMMR3DECL(int) DBGFR3Step(PUVM pUVM, VMCPUID idCpu)
1729	{
1730	return DBGFR3StepEx(pUVM, idCpu, DBGF_STEP_F_INTO, NULL, NULL, 0, 1);
1731	}
1732
1733
1734	/**
1735	* Full fleged step.
1736	*
1737	* This extended stepping API allows for doing multiple steps before raising an
1738	* event, helping implementing step over, step out and other more advanced
1739	* features.
1740	*
1741	* Like the DBGFR3Step() API, this will normally generate a DBGFEVENT_STEPPED or
1742	* DBGFEVENT_STEPPED_EVENT. However the stepping may be interrupted by other
1743	* events, which will abort the stepping.
1744	*
1745	* The stop on pop area feature is for safeguarding step out.
1746	*
1747	* Please note though, that it will always use stepping and never breakpoints.
1748	* While this allows for a much greater flexibility it can at times be rather
1749	* slow.
1750	*
1751	* @returns VBox status code.
1752	* @param pUVM The user mode VM handle.
1753	* @param idCpu The ID of the CPU to single step on.
1754	* @param fFlags Flags controlling the stepping, DBGF_STEP_F_XXX.
1755	* Either DBGF_STEP_F_INTO or DBGF_STEP_F_OVER must
1756	* always be specified.
1757	* @param pStopPcAddr Address to stop executing at. Completely ignored
1758	* unless DBGF_STEP_F_STOP_ON_ADDRESS is specified.
1759	* @param pStopPopAddr Stack address that SP must be lower than when
1760	* performing DBGF_STEP_F_STOP_ON_STACK_POP filtering.
1761	* @param cbStopPop The range starting at @a pStopPopAddr which is
1762	* considered to be within the same thread stack. Note
1763	* that the API allows @a pStopPopAddr and @a cbStopPop
1764	* to form an area that wraps around and it will
1765	* consider the part starting at 0 as included.
1766	* @param cMaxSteps The maximum number of steps to take. This is to
1767	* prevent stepping for ever, so passing UINT32_MAX is
1768	* not recommended.
1769	*
1770	* @remarks The two address arguments must be guest context virtual addresses,
1771	* or HMA. The code doesn't make much of a point of out HMA, though.
1772	*/
1773	VMMR3DECL(int) DBGFR3StepEx(PUVM pUVM, VMCPUID idCpu, uint32_t fFlags, PCDBGFADDRESS pStopPcAddr,
1774	PCDBGFADDRESS pStopPopAddr, RTGCUINTPTR cbStopPop, uint32_t cMaxSteps)
1775	{
1776	/*
1777	* Check state.
1778	*/
1779	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1780	PVM pVM = pUVM->pVM;
1781	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1782	AssertReturn(idCpu < pVM->cCpus, VERR_INVALID_PARAMETER);
1783	AssertReturn(!(fFlags & ~DBGF_STEP_F_VALID_MASK), VERR_INVALID_FLAGS);
1784	AssertReturn(RT_BOOL(fFlags & DBGF_STEP_F_INTO) != RT_BOOL(fFlags & DBGF_STEP_F_OVER), VERR_INVALID_FLAGS);
1785	if (fFlags & DBGF_STEP_F_STOP_ON_ADDRESS)
1786	{
1787	AssertReturn(RT_VALID_PTR(pStopPcAddr), VERR_INVALID_POINTER);
1788	AssertReturn(DBGFADDRESS_IS_VALID(pStopPcAddr), VERR_INVALID_PARAMETER);
1789	AssertReturn(DBGFADDRESS_IS_VIRT_GC(pStopPcAddr), VERR_INVALID_PARAMETER);
1790	}
1791	AssertReturn(!(fFlags & DBGF_STEP_F_STOP_ON_STACK_POP) \|\| RT_VALID_PTR(pStopPopAddr), VERR_INVALID_POINTER);
1792	if (fFlags & DBGF_STEP_F_STOP_ON_STACK_POP)
1793	{
1794	AssertReturn(RT_VALID_PTR(pStopPopAddr), VERR_INVALID_POINTER);
1795	AssertReturn(DBGFADDRESS_IS_VALID(pStopPopAddr), VERR_INVALID_PARAMETER);
1796	AssertReturn(DBGFADDRESS_IS_VIRT_GC(pStopPopAddr), VERR_INVALID_PARAMETER);
1797	AssertReturn(cbStopPop > 0, VERR_INVALID_PARAMETER);
1798	}
1799
1800	AssertReturn(pVM->dbgf.s.fAttached, VERR_DBGF_NOT_ATTACHED);
1801	PUVMCPU pUVCpu = &pUVM->aCpus[idCpu];
1802	if (RT_LIKELY(dbgfR3CpuIsHalted(pUVCpu)))
1803	{ /* likely */ }
1804	else
1805	return VERR_SEM_OUT_OF_TURN;
1806	Assert(pVM->dbgf.s.SteppingFilter.idCpu == NIL_VMCPUID);
1807
1808	/*
1809	* Send the emulation thread a single-step command.
1810	*/
1811	if (fFlags == DBGF_STEP_F_INTO)
1812	pVM->dbgf.s.SteppingFilter.idCpu = NIL_VMCPUID;
1813	else
1814	pVM->dbgf.s.SteppingFilter.idCpu = idCpu;
1815	pVM->dbgf.s.SteppingFilter.fFlags = fFlags;
1816	if (fFlags & DBGF_STEP_F_STOP_ON_ADDRESS)
1817	pVM->dbgf.s.SteppingFilter.AddrPc = pStopPcAddr->FlatPtr;
1818	else
1819	pVM->dbgf.s.SteppingFilter.AddrPc = 0;
1820	if (fFlags & DBGF_STEP_F_STOP_ON_STACK_POP)
1821	{
1822	pVM->dbgf.s.SteppingFilter.AddrStackPop = pStopPopAddr->FlatPtr;
1823	pVM->dbgf.s.SteppingFilter.cbStackPop = cbStopPop;
1824	}
1825	else
1826	{
1827	pVM->dbgf.s.SteppingFilter.AddrStackPop = 0;
1828	pVM->dbgf.s.SteppingFilter.cbStackPop = RTGCPTR_MAX;
1829	}
1830
1831	pVM->dbgf.s.SteppingFilter.cMaxSteps = cMaxSteps;
1832	pVM->dbgf.s.SteppingFilter.cSteps = 0;
1833	pVM->dbgf.s.SteppingFilter.uCallDepth = 0;
1834
1835	Assert(dbgfR3CpuIsHalted(pUVCpu));
1836	return dbgfR3CpuSetCmdAndNotify(pUVCpu, DBGFCMD_SINGLE_STEP);
1837	}
1838
1839
1840
1841	/**
1842	* dbgfR3EventConfigEx argument packet.
1843	*/
1844	typedef struct DBGFR3EVENTCONFIGEXARGS
1845	{
1846	PCDBGFEVENTCONFIG paConfigs;
1847	size_t cConfigs;
1848	int rc;
1849	} DBGFR3EVENTCONFIGEXARGS;
1850	/** Pointer to a dbgfR3EventConfigEx argument packet. */
1851	typedef DBGFR3EVENTCONFIGEXARGS *PDBGFR3EVENTCONFIGEXARGS;
1852
1853
1854	/**
1855	* @callback_method_impl{FNVMMEMTRENDEZVOUS, Worker for DBGFR3EventConfigEx.}
1856	*/
1857	static DECLCALLBACK(VBOXSTRICTRC) dbgfR3EventConfigEx(PVM pVM, PVMCPU pVCpu, void *pvUser)
1858	{
1859	if (pVCpu->idCpu == 0)
1860	{
1861	PDBGFR3EVENTCONFIGEXARGS pArgs = (PDBGFR3EVENTCONFIGEXARGS)pvUser;
1862	DBGFEVENTCONFIG volatile const *paConfigs = pArgs->paConfigs;
1863	size_t cConfigs = pArgs->cConfigs;
1864
1865	/*
1866	* Apply the changes.
1867	*/
1868	unsigned cChanges = 0;
1869	for (uint32_t i = 0; i < cConfigs; i++)
1870	{
1871	DBGFEVENTTYPE enmType = paConfigs[i].enmType;
1872	AssertReturn(enmType >= DBGFEVENT_FIRST_SELECTABLE && enmType < DBGFEVENT_END, VERR_INVALID_PARAMETER);
1873	if (paConfigs[i].fEnabled)
1874	cChanges += ASMAtomicBitTestAndSet(&pVM->dbgf.s.bmSelectedEvents, enmType) == false;
1875	else
1876	cChanges += ASMAtomicBitTestAndClear(&pVM->dbgf.s.bmSelectedEvents, enmType) == true;
1877	}
1878
1879	/*
1880	* Inform HM about changes.
1881	*/
1882	if (cChanges > 0 && HMIsEnabled(pVM))
1883	{
1884	HMR3NotifyDebugEventChanged(pVM);
1885	HMR3NotifyDebugEventChangedPerCpu(pVM, pVCpu);
1886	}
1887	}
1888	else if (HMIsEnabled(pVM))
1889	HMR3NotifyDebugEventChangedPerCpu(pVM, pVCpu);
1890
1891	return VINF_SUCCESS;
1892	}
1893
1894
1895	/**
1896	* Configures (enables/disables) multiple selectable debug events.
1897	*
1898	* @returns VBox status code.
1899	* @param pUVM The user mode VM handle.
1900	* @param paConfigs The event to configure and their new state.
1901	* @param cConfigs Number of entries in @a paConfigs.
1902	*/
1903	VMMR3DECL(int) DBGFR3EventConfigEx(PUVM pUVM, PCDBGFEVENTCONFIG paConfigs, size_t cConfigs)
1904	{
1905	/*
1906	* Validate input.
1907	*/
1908	size_t i = cConfigs;
1909	while (i-- > 0)
1910	{
1911	AssertReturn(paConfigs[i].enmType >= DBGFEVENT_FIRST_SELECTABLE, VERR_INVALID_PARAMETER);
1912	AssertReturn(paConfigs[i].enmType < DBGFEVENT_END, VERR_INVALID_PARAMETER);
1913	}
1914	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1915	PVM pVM = pUVM->pVM;
1916	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1917
1918	/*
1919	* Apply the changes in EMT(0) and rendezvous with the other CPUs so they
1920	* can sync their data and execution with new debug state.
1921	*/
1922	DBGFR3EVENTCONFIGEXARGS Args = { paConfigs, cConfigs, VINF_SUCCESS };
1923	int rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ASCENDING \| VMMEMTRENDEZVOUS_FLAGS_PRIORITY,
1924	dbgfR3EventConfigEx, &Args);
1925	if (RT_SUCCESS(rc))
1926	rc = Args.rc;
1927	return rc;
1928	}
1929
1930
1931	/**
1932	* Enables or disables a selectable debug event.
1933	*
1934	* @returns VBox status code.
1935	* @param pUVM The user mode VM handle.
1936	* @param enmEvent The selectable debug event.
1937	* @param fEnabled The new state.
1938	*/
1939	VMMR3DECL(int) DBGFR3EventConfig(PUVM pUVM, DBGFEVENTTYPE enmEvent, bool fEnabled)
1940	{
1941	/*
1942	* Convert to an array call.
1943	*/
1944	DBGFEVENTCONFIG EvtCfg = { enmEvent, fEnabled };
1945	return DBGFR3EventConfigEx(pUVM, &EvtCfg, 1);
1946	}
1947
1948
1949	/**
1950	* Checks if the given selectable event is enabled.
1951	*
1952	* @returns true if enabled, false if not or invalid input.
1953	* @param pUVM The user mode VM handle.
1954	* @param enmEvent The selectable debug event.
1955	* @sa DBGFR3EventQuery
1956	*/
1957	VMMR3DECL(bool) DBGFR3EventIsEnabled(PUVM pUVM, DBGFEVENTTYPE enmEvent)
1958	{
1959	/*
1960	* Validate input.
1961	*/
1962	AssertReturn( enmEvent >= DBGFEVENT_HALT_DONE
1963	&& enmEvent < DBGFEVENT_END, false);
1964	Assert( enmEvent >= DBGFEVENT_FIRST_SELECTABLE
1965	\|\| enmEvent == DBGFEVENT_BREAKPOINT
1966	\|\| enmEvent == DBGFEVENT_BREAKPOINT_IO
1967	\|\| enmEvent == DBGFEVENT_BREAKPOINT_MMIO);
1968
1969	UVM_ASSERT_VALID_EXT_RETURN(pUVM, false);
1970	PVM pVM = pUVM->pVM;
1971	VM_ASSERT_VALID_EXT_RETURN(pVM, false);
1972
1973	/*
1974	* Check the event status.
1975	*/
1976	return ASMBitTest(&pVM->dbgf.s.bmSelectedEvents, enmEvent);
1977	}
1978
1979
1980	/**
1981	* Queries the status of a set of events.
1982	*
1983	* @returns VBox status code.
1984	* @param pUVM The user mode VM handle.
1985	* @param paConfigs The events to query and where to return the state.
1986	* @param cConfigs The number of elements in @a paConfigs.
1987	* @sa DBGFR3EventIsEnabled, DBGF_IS_EVENT_ENABLED
1988	*/
1989	VMMR3DECL(int) DBGFR3EventQuery(PUVM pUVM, PDBGFEVENTCONFIG paConfigs, size_t cConfigs)
1990	{
1991	/*
1992	* Validate input.
1993	*/
1994	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1995	PVM pVM = pUVM->pVM;
1996	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1997
1998	for (size_t i = 0; i < cConfigs; i++)
1999	{
2000	DBGFEVENTTYPE enmType = paConfigs[i].enmType;
2001	AssertReturn( enmType >= DBGFEVENT_HALT_DONE
2002	&& enmType < DBGFEVENT_END, VERR_INVALID_PARAMETER);
2003	Assert( enmType >= DBGFEVENT_FIRST_SELECTABLE
2004	\|\| enmType == DBGFEVENT_BREAKPOINT
2005	\|\| enmType == DBGFEVENT_BREAKPOINT_IO
2006	\|\| enmType == DBGFEVENT_BREAKPOINT_MMIO);
2007	paConfigs[i].fEnabled = ASMBitTest(&pVM->dbgf.s.bmSelectedEvents, paConfigs[i].enmType);
2008	}
2009
2010	return VINF_SUCCESS;
2011	}
2012
2013
2014	/**
2015	* dbgfR3InterruptConfigEx argument packet.
2016	*/
2017	typedef struct DBGFR3INTERRUPTCONFIGEXARGS
2018	{
2019	PCDBGFINTERRUPTCONFIG paConfigs;
2020	size_t cConfigs;
2021	int rc;
2022	} DBGFR3INTERRUPTCONFIGEXARGS;
2023	/** Pointer to a dbgfR3InterruptConfigEx argument packet. */
2024	typedef DBGFR3INTERRUPTCONFIGEXARGS *PDBGFR3INTERRUPTCONFIGEXARGS;
2025
2026	/**
2027	* @callback_method_impl{FNVMMEMTRENDEZVOUS,
2028	* Worker for DBGFR3InterruptConfigEx.}
2029	*/
2030	static DECLCALLBACK(VBOXSTRICTRC) dbgfR3InterruptConfigEx(PVM pVM, PVMCPU pVCpu, void *pvUser)
2031	{
2032	if (pVCpu->idCpu == 0)
2033	{
2034	PDBGFR3INTERRUPTCONFIGEXARGS pArgs = (PDBGFR3INTERRUPTCONFIGEXARGS)pvUser;
2035	PCDBGFINTERRUPTCONFIG paConfigs = pArgs->paConfigs;
2036	size_t cConfigs = pArgs->cConfigs;
2037
2038	/*
2039	* Apply the changes.
2040	*/
2041	bool fChanged = false;
2042	bool fThis;
2043	for (uint32_t i = 0; i < cConfigs; i++)
2044	{
2045	/*
2046	* Hardware interrupts.
2047	*/
2048	if (paConfigs[i].enmHardState == DBGFINTERRUPTSTATE_ENABLED)
2049	{
2050	fChanged \|= fThis = ASMAtomicBitTestAndSet(&pVM->dbgf.s.bmHardIntBreakpoints, paConfigs[i].iInterrupt) == false;
2051	if (fThis)
2052	{
2053	Assert(pVM->dbgf.s.cHardIntBreakpoints < 256);
2054	pVM->dbgf.s.cHardIntBreakpoints++;
2055	}
2056	}
2057	else if (paConfigs[i].enmHardState == DBGFINTERRUPTSTATE_DISABLED)
2058	{
2059	fChanged \|= fThis = ASMAtomicBitTestAndClear(&pVM->dbgf.s.bmHardIntBreakpoints, paConfigs[i].iInterrupt) == true;
2060	if (fThis)
2061	{
2062	Assert(pVM->dbgf.s.cHardIntBreakpoints > 0);
2063	pVM->dbgf.s.cHardIntBreakpoints--;
2064	}
2065	}
2066
2067	/*
2068	* Software interrupts.
2069	*/
2070	if (paConfigs[i].enmHardState == DBGFINTERRUPTSTATE_ENABLED)
2071	{
2072	fChanged \|= fThis = ASMAtomicBitTestAndSet(&pVM->dbgf.s.bmSoftIntBreakpoints, paConfigs[i].iInterrupt) == false;
2073	if (fThis)
2074	{
2075	Assert(pVM->dbgf.s.cSoftIntBreakpoints < 256);
2076	pVM->dbgf.s.cSoftIntBreakpoints++;
2077	}
2078	}
2079	else if (paConfigs[i].enmSoftState == DBGFINTERRUPTSTATE_DISABLED)
2080	{
2081	fChanged \|= fThis = ASMAtomicBitTestAndClear(&pVM->dbgf.s.bmSoftIntBreakpoints, paConfigs[i].iInterrupt) == true;
2082	if (fThis)
2083	{
2084	Assert(pVM->dbgf.s.cSoftIntBreakpoints > 0);
2085	pVM->dbgf.s.cSoftIntBreakpoints--;
2086	}
2087	}
2088	}
2089
2090	/*
2091	* Update the event bitmap entries.
2092	*/
2093	if (pVM->dbgf.s.cHardIntBreakpoints > 0)
2094	fChanged \|= ASMAtomicBitTestAndSet(&pVM->dbgf.s.bmSelectedEvents, DBGFEVENT_INTERRUPT_HARDWARE) == false;
2095	else
2096	fChanged \|= ASMAtomicBitTestAndClear(&pVM->dbgf.s.bmSelectedEvents, DBGFEVENT_INTERRUPT_HARDWARE) == true;
2097
2098	if (pVM->dbgf.s.cSoftIntBreakpoints > 0)
2099	fChanged \|= ASMAtomicBitTestAndSet(&pVM->dbgf.s.bmSelectedEvents, DBGFEVENT_INTERRUPT_SOFTWARE) == false;
2100	else
2101	fChanged \|= ASMAtomicBitTestAndClear(&pVM->dbgf.s.bmSelectedEvents, DBGFEVENT_INTERRUPT_SOFTWARE) == true;
2102
2103	/*
2104	* Inform HM about changes.
2105	*/
2106	if (fChanged && HMIsEnabled(pVM))
2107	{
2108	HMR3NotifyDebugEventChanged(pVM);
2109	HMR3NotifyDebugEventChangedPerCpu(pVM, pVCpu);
2110	}
2111	}
2112	else if (HMIsEnabled(pVM))
2113	HMR3NotifyDebugEventChangedPerCpu(pVM, pVCpu);
2114
2115	return VINF_SUCCESS;
2116	}
2117
2118
2119	/**
2120	* Changes
2121	*
2122	* @returns VBox status code.
2123	* @param pUVM The user mode VM handle.
2124	* @param paConfigs The events to query and where to return the state.
2125	* @param cConfigs The number of elements in @a paConfigs.
2126	* @sa DBGFR3InterruptConfigHardware, DBGFR3InterruptConfigSoftware
2127	*/
2128	VMMR3DECL(int) DBGFR3InterruptConfigEx(PUVM pUVM, PCDBGFINTERRUPTCONFIG paConfigs, size_t cConfigs)
2129	{
2130	/*
2131	* Validate input.
2132	*/
2133	size_t i = cConfigs;
2134	while (i-- > 0)
2135	{
2136	AssertReturn(paConfigs[i].enmHardState <= DBGFINTERRUPTSTATE_DONT_TOUCH, VERR_INVALID_PARAMETER);
2137	AssertReturn(paConfigs[i].enmSoftState <= DBGFINTERRUPTSTATE_DONT_TOUCH, VERR_INVALID_PARAMETER);
2138	}
2139
2140	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
2141	PVM pVM = pUVM->pVM;
2142	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
2143
2144	/*
2145	* Apply the changes in EMT(0) and rendezvous with the other CPUs so they
2146	* can sync their data and execution with new debug state.
2147	*/
2148	DBGFR3INTERRUPTCONFIGEXARGS Args = { paConfigs, cConfigs, VINF_SUCCESS };
2149	int rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ASCENDING \| VMMEMTRENDEZVOUS_FLAGS_PRIORITY,
2150	dbgfR3InterruptConfigEx, &Args);
2151	if (RT_SUCCESS(rc))
2152	rc = Args.rc;
2153	return rc;
2154	}
2155
2156
2157	/**
2158	* Configures interception of a hardware interrupt.
2159	*
2160	* @returns VBox status code.
2161	* @param pUVM The user mode VM handle.
2162	* @param iInterrupt The interrupt number.
2163	* @param fEnabled Whether interception is enabled or not.
2164	* @sa DBGFR3InterruptSoftwareConfig, DBGFR3InterruptConfigEx
2165	*/
2166	VMMR3DECL(int) DBGFR3InterruptHardwareConfig(PUVM pUVM, uint8_t iInterrupt, bool fEnabled)
2167	{
2168	/*
2169	* Convert to DBGFR3InterruptConfigEx call.
2170	*/
2171	DBGFINTERRUPTCONFIG IntCfg = { iInterrupt, (uint8_t)fEnabled, DBGFINTERRUPTSTATE_DONT_TOUCH };
2172	return DBGFR3InterruptConfigEx(pUVM, &IntCfg, 1);
2173	}
2174
2175
2176	/**
2177	* Configures interception of a software interrupt.
2178	*
2179	* @returns VBox status code.
2180	* @param pUVM The user mode VM handle.
2181	* @param iInterrupt The interrupt number.
2182	* @param fEnabled Whether interception is enabled or not.
2183	* @sa DBGFR3InterruptHardwareConfig, DBGFR3InterruptConfigEx
2184	*/
2185	VMMR3DECL(int) DBGFR3InterruptSoftwareConfig(PUVM pUVM, uint8_t iInterrupt, bool fEnabled)
2186	{
2187	/*
2188	* Convert to DBGFR3InterruptConfigEx call.
2189	*/
2190	DBGFINTERRUPTCONFIG IntCfg = { iInterrupt, DBGFINTERRUPTSTATE_DONT_TOUCH, (uint8_t)fEnabled };
2191	return DBGFR3InterruptConfigEx(pUVM, &IntCfg, 1);
2192	}
2193
2194
2195	/**
2196	* Checks whether interception is enabled for a hardware interrupt.
2197	*
2198	* @returns true if enabled, false if not or invalid input.
2199	* @param pUVM The user mode VM handle.
2200	* @param iInterrupt The interrupt number.
2201	* @sa DBGFR3InterruptSoftwareIsEnabled, DBGF_IS_HARDWARE_INT_ENABLED,
2202	* DBGF_IS_SOFTWARE_INT_ENABLED
2203	*/
2204	VMMR3DECL(int) DBGFR3InterruptHardwareIsEnabled(PUVM pUVM, uint8_t iInterrupt)
2205	{
2206	/*
2207	* Validate input.
2208	*/
2209	UVM_ASSERT_VALID_EXT_RETURN(pUVM, false);
2210	PVM pVM = pUVM->pVM;
2211	VM_ASSERT_VALID_EXT_RETURN(pVM, false);
2212
2213	/*
2214	* Check it.
2215	*/
2216	return ASMBitTest(&pVM->dbgf.s.bmHardIntBreakpoints, iInterrupt);
2217	}
2218
2219
2220	/**
2221	* Checks whether interception is enabled for a software interrupt.
2222	*
2223	* @returns true if enabled, false if not or invalid input.
2224	* @param pUVM The user mode VM handle.
2225	* @param iInterrupt The interrupt number.
2226	* @sa DBGFR3InterruptHardwareIsEnabled, DBGF_IS_SOFTWARE_INT_ENABLED,
2227	* DBGF_IS_HARDWARE_INT_ENABLED,
2228	*/
2229	VMMR3DECL(int) DBGFR3InterruptSoftwareIsEnabled(PUVM pUVM, uint8_t iInterrupt)
2230	{
2231	/*
2232	* Validate input.
2233	*/
2234	UVM_ASSERT_VALID_EXT_RETURN(pUVM, false);
2235	PVM pVM = pUVM->pVM;
2236	VM_ASSERT_VALID_EXT_RETURN(pVM, false);
2237
2238	/*
2239	* Check it.
2240	*/
2241	return ASMBitTest(&pVM->dbgf.s.bmSoftIntBreakpoints, iInterrupt);
2242	}
2243
2244
2245
2246	/**
2247	* Call this to single step programmatically.
2248	*
2249	* You must pass down the return code to the EM loop! That's
2250	* where the actual single stepping take place (at least in the
2251	* current implementation).
2252	*
2253	* @returns VINF_EM_DBG_STEP
2254	*
2255	* @param pVCpu The cross context virtual CPU structure.
2256	*
2257	* @thread VCpu EMT
2258	* @internal
2259	*/
2260	VMMR3_INT_DECL(int) DBGFR3PrgStep(PVMCPU pVCpu)
2261	{
2262	VMCPU_ASSERT_EMT(pVCpu);
2263
2264	pVCpu->dbgf.s.fSingleSteppingRaw = true;
2265	return VINF_EM_DBG_STEP;
2266	}
2267
2268
2269	/**
2270	* Inject an NMI into a running VM (only VCPU 0!)
2271	*
2272	* @returns VBox status code.
2273	* @param pUVM The user mode VM structure.
2274	* @param idCpu The ID of the CPU to inject the NMI on.
2275	*/
2276	VMMR3DECL(int) DBGFR3InjectNMI(PUVM pUVM, VMCPUID idCpu)
2277	{
2278	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
2279	PVM pVM = pUVM->pVM;
2280	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
2281	AssertReturn(idCpu < pVM->cCpus, VERR_INVALID_CPU_ID);
2282
2283	/** @todo Implement generic NMI injection. */
2284	/** @todo NEM: NMI injection */
2285	if (!HMIsEnabled(pVM))
2286	return VERR_NOT_SUP_BY_NEM;
2287
2288	VMCPU_FF_SET(pVM->apCpusR3[idCpu], VMCPU_FF_INTERRUPT_NMI);
2289	return VINF_SUCCESS;
2290	}
2291

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source: vbox/trunk/src/VBox/VMM/VMMR3/DBGF.cpp@ 86392

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