DBGF.cpp@ 92780

Last change on this file since 92780 was 91695, checked in by vboxsync, 3 years ago
VMM/DBGF: Check for environment variable VBOX_DBGF_NO_WAIT_FOR_ATTACH to shorten the wait for a debugger.
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1	/* $Id: DBGF.cpp 91695 2021-10-12 14:25:41Z 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	static int dbgfR3EventHaltAllVCpus(PVM pVM, PVMCPU pVCpuExclude);
120
121
122
123	/**
124	* Initializes the DBGF.
125	*
126	* @returns VBox status code.
127	* @param pVM The cross context VM structure.
128	*/
129	VMMR3_INT_DECL(int) DBGFR3Init(PVM pVM)
130	{
131	PUVM pUVM = pVM->pUVM;
132	AssertCompile(sizeof(pUVM->dbgf.s) <= sizeof(pUVM->dbgf.padding));
133	AssertCompile(sizeof(pUVM->aCpus[0].dbgf.s) <= sizeof(pUVM->aCpus[0].dbgf.padding));
134
135	pVM->dbgf.s.SteppingFilter.idCpu = NIL_VMCPUID;
136
137	/*
138	* The usual sideways mountain climbing style of init:
139	*/
140	int rc = dbgfR3InfoInit(pUVM); /* (First, initalizes the shared critical section.) */
141	if (RT_SUCCESS(rc))
142	{
143	rc = dbgfR3TraceInit(pVM);
144	if (RT_SUCCESS(rc))
145	{
146	rc = dbgfR3RegInit(pUVM);
147	if (RT_SUCCESS(rc))
148	{
149	rc = dbgfR3AsInit(pUVM);
150	if (RT_SUCCESS(rc))
151	{
152	rc = dbgfR3BpInit(pUVM);
153	if (RT_SUCCESS(rc))
154	{
155	rc = dbgfR3OSInit(pUVM);
156	if (RT_SUCCESS(rc))
157	{
158	rc = dbgfR3PlugInInit(pUVM);
159	if (RT_SUCCESS(rc))
160	{
161	rc = dbgfR3BugCheckInit(pVM);
162	if (RT_SUCCESS(rc))
163	{
164	#ifdef VBOX_WITH_DBGF_TRACING
165	rc = dbgfR3TracerInit(pVM);
166	#endif
167	if (RT_SUCCESS(rc))
168	{
169	return VINF_SUCCESS;
170	}
171	}
172	dbgfR3PlugInTerm(pUVM);
173	}
174	dbgfR3OSTermPart1(pUVM);
175	dbgfR3OSTermPart2(pUVM);
176	}
177	dbgfR3BpTerm(pUVM);
178	}
179	dbgfR3AsTerm(pUVM);
180	}
181	dbgfR3RegTerm(pUVM);
182	}
183	dbgfR3TraceTerm(pVM);
184	}
185	dbgfR3InfoTerm(pUVM);
186	}
187	return rc;
188	}
189
190
191	/**
192	* Terminates and cleans up resources allocated by the DBGF.
193	*
194	* @returns VBox status code.
195	* @param pVM The cross context VM structure.
196	*/
197	VMMR3_INT_DECL(int) DBGFR3Term(PVM pVM)
198	{
199	PUVM pUVM = pVM->pUVM;
200
201	#ifdef VBOX_WITH_DBGF_TRACING
202	dbgfR3TracerTerm(pVM);
203	#endif
204	dbgfR3OSTermPart1(pUVM);
205	dbgfR3PlugInTerm(pUVM);
206	dbgfR3OSTermPart2(pUVM);
207	dbgfR3BpTerm(pUVM);
208	dbgfR3AsTerm(pUVM);
209	dbgfR3RegTerm(pUVM);
210	dbgfR3TraceTerm(pVM);
211	dbgfR3InfoTerm(pUVM);
212
213	return VINF_SUCCESS;
214	}
215
216
217	/**
218	* This is for tstCFGM and others to avoid trigger leak detection.
219	*
220	* @returns VBox status code.
221	* @param pUVM The user mode VM structure.
222	*/
223	VMMR3DECL(void) DBGFR3TermUVM(PUVM pUVM)
224	{
225	dbgfR3InfoTerm(pUVM);
226	}
227
228
229	/**
230	* Called when the VM is powered off to detach debuggers.
231	*
232	* @param pVM The cross context VM structure.
233	*/
234	VMMR3_INT_DECL(void) DBGFR3PowerOff(PVM pVM)
235	{
236	/*
237	* Send a termination event to any attached debugger.
238	*/
239	if (pVM->dbgf.s.fAttached)
240	{
241	PVMCPU pVCpu = VMMGetCpu(pVM);
242	int rc = dbgfR3SendEventWait(pVM, pVCpu, DBGFEVENT_POWERING_OFF, DBGFEVENTCTX_OTHER);
243	AssertLogRelRC(rc);
244
245	/*
246	* Clear the FF so we won't get confused later on.
247	*/
248	VM_FF_CLEAR(pVM, VM_FF_DBGF);
249	}
250	}
251
252
253	/**
254	* Applies relocations to data and code managed by this
255	* component. This function will be called at init and
256	* whenever the VMM need to relocate it self inside the GC.
257	*
258	* @param pVM The cross context VM structure.
259	* @param offDelta Relocation delta relative to old location.
260	*/
261	VMMR3_INT_DECL(void) DBGFR3Relocate(PVM pVM, RTGCINTPTR offDelta)
262	{
263	dbgfR3TraceRelocate(pVM);
264	dbgfR3AsRelocate(pVM->pUVM, offDelta);
265	}
266
267
268	/**
269	* Waits a little while for a debuggger to attach.
270	*
271	* @returns True is a debugger have attached.
272	* @param pVM The cross context VM structure.
273	* @param pVCpu The cross context per CPU structure.
274	* @param enmEvent Event.
275	*
276	* @thread EMT(pVCpu)
277	*/
278	bool dbgfR3WaitForAttach(PVM pVM, PVMCPU pVCpu, DBGFEVENTTYPE enmEvent)
279	{
280	/*
281	* First a message.
282	*/
283	#if !defined(DEBUG)
284	int cWait = 10;
285	#else
286	int cWait = RTEnvExist("VBOX_DBGF_NO_WAIT_FOR_ATTACH")
287	\|\| ( !VM_IS_RAW_MODE_ENABLED(pVM)
288	&& ( enmEvent == DBGFEVENT_ASSERTION_HYPER
289	\|\| enmEvent == DBGFEVENT_FATAL_ERROR)
290	&& !RTEnvExist("VBOX_DBGF_WAIT_FOR_ATTACH"))
291	? 10
292	: 150;
293	#endif
294	RTStrmPrintf(g_pStdErr,
295	"DBGF: No debugger attached, waiting %d second%s for one to attach (event=%d)\n"
296	#ifdef DEBUG
297	" Set VBOX_DBGF_NO_WAIT_FOR_ATTACH=1 for short wait or VBOX_DBGF_WAIT_FOR_ATTACH=1 longer.\n"
298	#endif
299	,
300	cWait / 10, cWait != 10 ? "s" : "", enmEvent);
301	RTStrmFlush(g_pStdErr);
302	while (cWait > 0)
303	{
304	RTThreadSleep(100);
305	if (pVM->dbgf.s.fAttached)
306	{
307	RTStrmPrintf(g_pStdErr, "Attached!\n");
308	RTStrmFlush(g_pStdErr);
309	return true;
310	}
311
312	/* Process rendezvous (debugger attaching involves such). */
313	if (VM_FF_IS_SET(pVM, VM_FF_EMT_RENDEZVOUS))
314	{
315	int rc = VMMR3EmtRendezvousFF(pVM, pVCpu); AssertRC(rc);
316	if (rc != VINF_SUCCESS)
317	{
318	/** @todo Ignoring these could be bad. */
319	RTStrmPrintf(g_pStdErr, "[rcRendezvous=%Rrc, ignored!]", rc);
320	RTStrmFlush(g_pStdErr);
321	}
322	}
323
324	/* Process priority stuff. */
325	if ( VM_FF_IS_SET(pVM, VM_FF_REQUEST)
326	\|\| VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_REQUEST))
327	{
328	int rc = VMR3ReqProcessU(pVM->pUVM, VMCPUID_ANY, true /fPriorityOnly/);
329	if (rc == VINF_SUCCESS)
330	rc = VMR3ReqProcessU(pVM->pUVM, pVCpu->idCpu, true /fPriorityOnly/);
331	if (rc != VINF_SUCCESS)
332	{
333	/** @todo Ignoring these could be bad. */
334	RTStrmPrintf(g_pStdErr, "[rcReq=%Rrc, ignored!]", rc);
335	RTStrmFlush(g_pStdErr);
336	}
337	}
338
339	/* next */
340	if (!(cWait % 10))
341	{
342	RTStrmPrintf(g_pStdErr, "%d.", cWait / 10);
343	RTStrmFlush(g_pStdErr);
344	}
345	cWait--;
346	}
347
348	RTStrmPrintf(g_pStdErr, "Stopping the VM!\n");
349	RTStrmFlush(g_pStdErr);
350	return false;
351	}
352
353
354	/**
355	* Forced action callback.
356	*
357	* The VMM will call this from it's main loop when either VM_FF_DBGF or
358	* VMCPU_FF_DBGF are set.
359	*
360	* The function checks for and executes pending commands from the debugger.
361	* Then it checks for pending debug events and serves these.
362	*
363	* @returns VINF_SUCCESS normally.
364	* @returns VERR_DBGF_RAISE_FATAL_ERROR to pretend a fatal error happened.
365	* @param pVM The cross context VM structure.
366	* @param pVCpu The cross context per CPU structure.
367	*/
368	VMMR3_INT_DECL(int) DBGFR3VMMForcedAction(PVM pVM, PVMCPU pVCpu)
369	{
370	VBOXSTRICTRC rcStrict = VINF_SUCCESS;
371
372	/*
373	* Dispatch pending events.
374	*/
375	if (VMCPU_FF_TEST_AND_CLEAR(pVCpu, VMCPU_FF_DBGF))
376	{
377	if ( pVCpu->dbgf.s.cEvents > 0
378	&& pVCpu->dbgf.s.aEvents[pVCpu->dbgf.s.cEvents - 1].enmState == DBGFEVENTSTATE_CURRENT)
379	{
380	rcStrict = DBGFR3EventHandlePending(pVM, pVCpu);
381	/** @todo may end up with VERR_DBGF_NOT_ATTACHED here, which will prove fatal... */
382	}
383
384	/*
385	* Command pending? Process it.
386	*/
387	PUVMCPU pUVCpu = pVCpu->pUVCpu;
388	if (pUVCpu->dbgf.s.enmDbgfCmd != DBGFCMD_NO_COMMAND)
389	{
390	bool fResumeExecution;
391	DBGFCMDDATA CmdData = pUVCpu->dbgf.s.DbgfCmdData;
392	DBGFCMD enmCmd = dbgfR3CpuGetCmd(pUVCpu);
393	VBOXSTRICTRC rcStrict2 = dbgfR3CpuCmd(pVCpu, enmCmd, &CmdData, &fResumeExecution);
394	if (!fResumeExecution)
395	rcStrict2 = dbgfR3CpuWait(pVCpu);
396	if ( rcStrict2 != VINF_SUCCESS
397	&& ( rcStrict == VINF_SUCCESS
398	\|\| RT_FAILURE(rcStrict2)
399	\|\| rcStrict2 < rcStrict) ) /** @todo oversimplified? */
400	rcStrict = rcStrict2;
401	}
402	}
403
404	return VBOXSTRICTRC_TODO(rcStrict);
405	}
406
407
408	/**
409	* Try to determine the event context.
410	*
411	* @returns debug event context.
412	* @param pVCpu The cross context vCPU structure.
413	*/
414	static DBGFEVENTCTX dbgfR3FigureEventCtx(PVMCPU pVCpu)
415	{
416	switch (EMGetState(pVCpu))
417	{
418	case EMSTATE_HM:
419	case EMSTATE_NEM:
420	case EMSTATE_DEBUG_GUEST_HM:
421	case EMSTATE_DEBUG_GUEST_NEM:
422	return DBGFEVENTCTX_HM;
423
424	case EMSTATE_IEM:
425	case EMSTATE_RAW:
426	case EMSTATE_IEM_THEN_REM:
427	case EMSTATE_DEBUG_GUEST_IEM:
428	case EMSTATE_DEBUG_GUEST_RAW:
429	return DBGFEVENTCTX_RAW;
430
431
432	case EMSTATE_REM:
433	case EMSTATE_DEBUG_GUEST_REM:
434	return DBGFEVENTCTX_REM;
435
436	case EMSTATE_DEBUG_HYPER:
437	case EMSTATE_GURU_MEDITATION:
438	return DBGFEVENTCTX_HYPER;
439
440	default:
441	return DBGFEVENTCTX_OTHER;
442	}
443	}
444
445
446	/**
447	* Sends the event to the debugger (i.e. adds it to the event ring buffer).
448	*
449	* @returns VBox status code.
450	* @param pVM The cross context VM structure.
451	* @param pVCpu The CPU sending the event.
452	* @param enmType The event type to send.
453	* @param enmCtx The event context, DBGFEVENTCTX_INVALID will be resolved.
454	* @param pvPayload Event payload (DBGFEVENT::u data), optional.
455	* @param cbPayload The size of the event payload, optional.
456	*/
457	static int dbgfR3SendEventWorker(PVM pVM, PVMCPU pVCpu, DBGFEVENTTYPE enmType, DBGFEVENTCTX enmCtx,
458	void const *pvPayload, size_t cbPayload)
459	{
460	PUVM pUVM = pVM->pUVM;
461	pVM->dbgf.s.SteppingFilter.idCpu = NIL_VMCPUID; /** @todo per vCPU stepping filter. */
462
463	/*
464	* Massage the input a little.
465	*/
466	AssertStmt(cbPayload <= RT_SIZEOFMEMB(DBGFEVENT, u), cbPayload = RT_SIZEOFMEMB(DBGFEVENT, u));
467	if (enmCtx == DBGFEVENTCTX_INVALID)
468	enmCtx = dbgfR3FigureEventCtx(pVCpu);
469
470	/*
471	* Put the event into the ring buffer.
472	*/
473	RTSemFastMutexRequest(pUVM->dbgf.s.hMtxDbgEvtWr);
474
475	uint32_t const cDbgEvtMax = RT_MAX(1, pUVM->dbgf.s.cDbgEvtMax);
476	uint32_t const idxDbgEvtWrite = ASMAtomicReadU32(&pUVM->dbgf.s.idxDbgEvtWrite);
477	uint32_t const idxDbgEvtRead = ASMAtomicReadU32(&pUVM->dbgf.s.idxDbgEvtRead);
478	/** @todo Handle full buffer. */ RT_NOREF(idxDbgEvtRead);
479
480	PDBGFEVENT pEvent = &pUVM->dbgf.s.paDbgEvts[idxDbgEvtWrite % cDbgEvtMax];
481
482	#ifdef DEBUG
483	ASMMemFill32(pEvent, sizeof(*pEvent), UINT32_C(0xdeadbeef));
484	#endif
485	pEvent->enmType = enmType;
486	pEvent->enmCtx = enmCtx;
487	pEvent->idCpu = pVCpu->idCpu;
488	pEvent->uReserved = 0;
489	if (cbPayload)
490	memcpy(&pEvent->u, pvPayload, cbPayload);
491
492	ASMAtomicWriteU32(&pUVM->dbgf.s.idxDbgEvtWrite, (idxDbgEvtWrite + 1) % cDbgEvtMax);
493
494	RTSemFastMutexRelease(pUVM->dbgf.s.hMtxDbgEvtWr);
495
496	/*
497	* Signal the debugger.
498	*/
499	return RTSemEventSignal(pUVM->dbgf.s.hEvtWait);
500	}
501
502
503	/**
504	* Send event and wait for the debugger to respond.
505	*
506	* @returns Strict VBox status code.
507	* @param pVM The cross context VM structure.
508	* @param pVCpu The CPU sending the event.
509	* @param enmType The event type to send.
510	* @param enmCtx The event context, DBGFEVENTCTX_INVALID will be resolved.
511	*/
512	DECLINLINE(int) dbgfR3SendEventWait(PVM pVM, PVMCPU pVCpu, DBGFEVENTTYPE enmType, DBGFEVENTCTX enmCtx)
513	{
514	int rc = dbgfR3SendEventWorker(pVM, pVCpu, enmType, enmCtx, NULL, 0);
515	if (RT_SUCCESS(rc))
516	rc = dbgfR3CpuWait(pVCpu);
517	return rc;
518	}
519
520
521	/**
522	* Send event and wait for the debugger to respond, extended version.
523	*
524	* @returns Strict VBox status code.
525	* @param pVM The cross context VM structure.
526	* @param pVCpu The CPU sending the event.
527	* @param enmType The event type to send.
528	* @param enmCtx The event context, DBGFEVENTCTX_INVALID will be resolved.
529	* @param pvPayload Event payload (DBGFEVENT::u data), optional.
530	* @param cbPayload The size of the event payload, optional.
531	*/
532	DECLINLINE(int) dbgfR3SendEventWaitEx(PVM pVM, PVMCPU pVCpu, DBGFEVENTTYPE enmType, DBGFEVENTCTX enmCtx,
533	void const *pvPayload, size_t cbPayload)
534	{
535	int rc = dbgfR3SendEventWorker(pVM, pVCpu, enmType, enmCtx, pvPayload, cbPayload);
536	if (RT_SUCCESS(rc))
537	rc = dbgfR3CpuWait(pVCpu);
538	return rc;
539	}
540
541
542	/**
543	* Send event but do NOT wait for the debugger.
544	*
545	* Currently only used by dbgfR3CpuCmd().
546	*
547	* @param pVM The cross context VM structure.
548	* @param pVCpu The CPU sending the event.
549	* @param enmType The event type to send.
550	* @param enmCtx The event context, DBGFEVENTCTX_INVALID will be resolved.
551	*/
552	DECLINLINE(int) dbgfR3SendEventNoWait(PVM pVM, PVMCPU pVCpu, DBGFEVENTTYPE enmType, DBGFEVENTCTX enmCtx)
553	{
554	return dbgfR3SendEventWorker(pVM, pVCpu, enmType, enmCtx, NULL, 0);
555	}
556
557
558	/**
559	* The common event prologue code.
560	*
561	* It will make sure someone is attached, and perhaps process any high priority
562	* pending actions (none yet).
563	*
564	* @returns VBox status code.
565	* @param pVM The cross context VM structure.
566	* @param pVCpu The vCPU cross context structure.
567	* @param enmEvent The event to be sent.
568	*/
569	static int dbgfR3EventPrologue(PVM pVM, PVMCPU pVCpu, DBGFEVENTTYPE enmEvent)
570	{
571	/*
572	* Check if a debugger is attached.
573	*/
574	if ( !pVM->dbgf.s.fAttached
575	&& !dbgfR3WaitForAttach(pVM, pVCpu, enmEvent))
576	{
577	Log(("dbgfR3EventPrologue: enmEvent=%d - debugger not attached\n", enmEvent));
578	return VERR_DBGF_NOT_ATTACHED;
579	}
580
581	/*
582	* Look thru pending commands and finish those which make sense now.
583	*/
584	/** @todo Process/purge pending commands. */
585	//int rc = DBGFR3VMMForcedAction(pVM);
586	return VINF_SUCCESS;
587	}
588
589
590	/**
591	* Processes a pending event on the current CPU.
592	*
593	* This is called by EM in response to VINF_EM_DBG_EVENT.
594	*
595	* @returns Strict VBox status code.
596	* @param pVM The cross context VM structure.
597	* @param pVCpu The cross context per CPU structure.
598	*
599	* @thread EMT(pVCpu)
600	*/
601	VMMR3_INT_DECL(VBOXSTRICTRC) DBGFR3EventHandlePending(PVM pVM, PVMCPU pVCpu)
602	{
603	VMCPU_ASSERT_EMT(pVCpu);
604	VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_DBGF);
605
606	/*
607	* Check that we've got an event first.
608	*/
609	AssertReturn(pVCpu->dbgf.s.cEvents > 0, VINF_SUCCESS);
610	AssertReturn(pVCpu->dbgf.s.aEvents[pVCpu->dbgf.s.cEvents - 1].enmState == DBGFEVENTSTATE_CURRENT, VINF_SUCCESS);
611	PDBGFEVENT pEvent = &pVCpu->dbgf.s.aEvents[pVCpu->dbgf.s.cEvents - 1].Event;
612
613	/*
614	* Make sure we've got a debugger and is allowed to speak to it.
615	*/
616	int rc = dbgfR3EventPrologue(pVM, pVCpu, pEvent->enmType);
617	if (RT_FAILURE(rc))
618	{
619	/** @todo drop them events? */
620	return rc; /** @todo this will cause trouble if we're here via an FF! */
621	}
622
623	/*
624	* Send the event and mark it as ignore.
625	* ASSUMES no new events get generate while dbgfR3CpuWait is executing!
626	*/
627	VBOXSTRICTRC rcStrict = dbgfR3SendEventWaitEx(pVM, pVCpu, pEvent->enmType, pEvent->enmCtx, &pEvent->u, sizeof(pEvent->u));
628	pVCpu->dbgf.s.aEvents[pVCpu->dbgf.s.cEvents - 1].enmState = DBGFEVENTSTATE_IGNORE;
629	return rcStrict;
630	}
631
632
633	/**
634	* Send a generic debugger event which takes no data.
635	*
636	* @returns VBox status code.
637	* @param pVM The cross context VM structure.
638	* @param enmEvent The event to send.
639	* @internal
640	*/
641	VMMR3DECL(int) DBGFR3Event(PVM pVM, DBGFEVENTTYPE enmEvent)
642	{
643	PVMCPU pVCpu = VMMGetCpu(pVM);
644	AssertReturn(pVCpu, VERR_VM_THREAD_NOT_EMT);
645
646	/*
647	* Do stepping filtering.
648	*/
649	/** @todo Would be better if we did some of this inside the execution
650	* engines. */
651	if ( enmEvent == DBGFEVENT_STEPPED
652	\|\| enmEvent == DBGFEVENT_STEPPED_HYPER)
653	{
654	if (!dbgfStepAreWeThereYet(pVM, pVCpu))
655	return VINF_EM_DBG_STEP;
656	}
657
658	int rc = dbgfR3EventPrologue(pVM, pVCpu, enmEvent);
659	if (RT_FAILURE(rc))
660	return rc;
661
662	/*
663	* Send the event and process the reply communication.
664	*/
665	return dbgfR3SendEventWait(pVM, pVCpu, enmEvent, DBGFEVENTCTX_INVALID);
666	}
667
668
669	/**
670	* Send a debugger event which takes the full source file location.
671	*
672	* @returns VBox status code.
673	* @param pVM The cross context VM structure.
674	* @param enmEvent The event to send.
675	* @param pszFile Source file.
676	* @param uLine Line number in source file.
677	* @param pszFunction Function name.
678	* @param pszFormat Message which accompanies the event.
679	* @param ... Message arguments.
680	* @internal
681	*/
682	VMMR3DECL(int) DBGFR3EventSrc(PVM pVM, DBGFEVENTTYPE enmEvent, const char pszFile, unsigned uLine, const char pszFunction, const char *pszFormat, ...)
683	{
684	va_list args;
685	va_start(args, pszFormat);
686	int rc = DBGFR3EventSrcV(pVM, enmEvent, pszFile, uLine, pszFunction, pszFormat, args);
687	va_end(args);
688	return rc;
689	}
690
691
692	/**
693	* Send a debugger event which takes the full source file location.
694	*
695	* @returns VBox status code.
696	* @param pVM The cross context VM structure.
697	* @param enmEvent The event to send.
698	* @param pszFile Source file.
699	* @param uLine Line number in source file.
700	* @param pszFunction Function name.
701	* @param pszFormat Message which accompanies the event.
702	* @param args Message arguments.
703	* @internal
704	*/
705	VMMR3DECL(int) DBGFR3EventSrcV(PVM pVM, DBGFEVENTTYPE enmEvent, const char pszFile, unsigned uLine, const char pszFunction, const char *pszFormat, va_list args)
706	{
707	PVMCPU pVCpu = VMMGetCpu(pVM);
708	AssertReturn(pVCpu, VERR_VM_THREAD_NOT_EMT);
709
710	int rc = dbgfR3EventPrologue(pVM, pVCpu, enmEvent);
711	if (RT_FAILURE(rc))
712	return rc;
713
714	/*
715	* Format the message.
716	*/
717	char *pszMessage = NULL;
718	char szMessage[8192];
719	if (pszFormat && *pszFormat)
720	{
721	pszMessage = &szMessage[0];
722	RTStrPrintfV(szMessage, sizeof(szMessage), pszFormat, args);
723	}
724
725	/*
726	* Send the event and process the reply communication.
727	*/
728	DBGFEVENT DbgEvent; /** @todo split up DBGFEVENT so we can skip the dead wait on the stack? */
729	DbgEvent.u.Src.pszFile = pszFile;
730	DbgEvent.u.Src.uLine = uLine;
731	DbgEvent.u.Src.pszFunction = pszFunction;
732	DbgEvent.u.Src.pszMessage = pszMessage;
733	return dbgfR3SendEventWaitEx(pVM, pVCpu, enmEvent, DBGFEVENTCTX_INVALID, &DbgEvent.u, sizeof(DbgEvent.u.Src));
734	}
735
736
737	/**
738	* Send a debugger event which takes the two assertion messages.
739	*
740	* @returns VBox status code.
741	* @param pVM The cross context VM structure.
742	* @param enmEvent The event to send.
743	* @param pszMsg1 First assertion message.
744	* @param pszMsg2 Second assertion message.
745	*/
746	VMMR3_INT_DECL(int) DBGFR3EventAssertion(PVM pVM, DBGFEVENTTYPE enmEvent, const char pszMsg1, const char pszMsg2)
747	{
748	PVMCPU pVCpu = VMMGetCpu(pVM);
749	AssertReturn(pVCpu, VERR_VM_THREAD_NOT_EMT);
750
751	int rc = dbgfR3EventPrologue(pVM, pVCpu, enmEvent);
752	if (RT_FAILURE(rc))
753	return rc;
754
755	/*
756	* Send the event and process the reply communication.
757	*/
758	DBGFEVENT DbgEvent;
759	DbgEvent.u.Assert.pszMsg1 = pszMsg1;
760	DbgEvent.u.Assert.pszMsg2 = pszMsg2;
761	return dbgfR3SendEventWaitEx(pVM, pVCpu, enmEvent, DBGFEVENTCTX_INVALID, &DbgEvent.u, sizeof(DbgEvent.u.Assert));
762	}
763
764
765	/**
766	* Breakpoint was hit somewhere.
767	* Figure out which breakpoint it is and notify the debugger.
768	*
769	* @returns VBox status code.
770	* @param pVM The cross context VM structure.
771	* @param enmEvent DBGFEVENT_BREAKPOINT_HYPER or DBGFEVENT_BREAKPOINT.
772	*/
773	VMMR3_INT_DECL(int) DBGFR3EventBreakpoint(PVM pVM, DBGFEVENTTYPE enmEvent)
774	{
775	PVMCPU pVCpu = VMMGetCpu(pVM);
776	AssertReturn(pVCpu, VERR_VM_THREAD_NOT_EMT);
777
778	int rc = dbgfR3EventPrologue(pVM, pVCpu, enmEvent);
779	if (RT_FAILURE(rc))
780	return rc;
781
782	/*
783	* Halt all other vCPUs as well to give the user the ability to inspect other
784	* vCPU states as well.
785	*/
786	rc = dbgfR3EventHaltAllVCpus(pVM, pVCpu);
787	if (RT_FAILURE(rc))
788	return rc;
789
790	/*
791	* Send the event and process the reply communication.
792	*/
793	DBGFEVENT DbgEvent;
794	DbgEvent.u.Bp.hBp = pVCpu->dbgf.s.hBpActive;
795	pVCpu->dbgf.s.hBpActive = NIL_DBGFBP;
796	if (DbgEvent.u.Bp.hBp != NIL_DBGFBP)
797	{
798	DbgEvent.enmCtx = DBGFEVENTCTX_RAW;
799	return dbgfR3SendEventWaitEx(pVM, pVCpu, enmEvent, DBGFEVENTCTX_RAW, &DbgEvent.u, sizeof(DbgEvent.u.Bp));
800	}
801
802	return VERR_DBGF_IPE_1;
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	* @callback_method_impl{FNVMMEMTRENDEZVOUS}
880	*/
881	static DECLCALLBACK(VBOXSTRICTRC) dbgfR3EventHaltEmtWorker(PVM pVM, PVMCPU pVCpu, void *pvUser)
882	{
883	RT_NOREF(pvUser);
884
885	VMCPU_ASSERT_EMT(pVCpu);
886	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
887
888	PUVMCPU pUVCpu = pVCpu->pUVCpu;
889	if ( pVCpu != (PVMCPU)pvUser
890	&& !dbgfR3CpuIsHalted(pUVCpu))
891	dbgfR3CpuSetCmdAndNotify(pUVCpu, DBGFCMD_HALT);
892
893	return VINF_SUCCESS;
894	}
895
896
897	/**
898	* Halts all vCPUs of the given VM except for the given one.
899	*
900	* @returns VBox status code.
901	* @param pVM The cross context VM structure.
902	* @param pVCpuExclude The vCPU cross context structure of the vCPU to exclude.
903	*/
904	static int dbgfR3EventHaltAllVCpus(PVM pVM, PVMCPU pVCpuExclude)
905	{
906	return VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ALL_AT_ONCE, dbgfR3EventHaltEmtWorker, pVCpuExclude);
907	}
908
909
910	/**
911	* Waits for the debugger to respond.
912	*
913	* @returns VBox status code. (clearify)
914	* @param pVCpu The cross context vCPU structure.
915	*/
916	static int dbgfR3CpuWait(PVMCPU pVCpu)
917	{
918	PVM pVM = pVCpu->CTX_SUFF(pVM);
919	PUVMCPU pUVCpu = pVCpu->pUVCpu;
920
921	LogFlow(("dbgfR3CpuWait:\n"));
922	int rcRet = VINF_SUCCESS;
923
924	ASMAtomicWriteBool(&pUVCpu->dbgf.s.fStopped, true);
925
926	/*
927	* Waits for the debugger to reply (i.e. issue an command).
928	*/
929	for (;;)
930	{
931	/*
932	* Wait.
933	*/
934	for (;;)
935	{
936	/*
937	* Process forced flags before we go sleep.
938	*/
939	if ( VMCPU_FF_IS_ANY_SET(pVCpu, VMCPU_FF_DBGF \| VMCPU_FF_REQUEST)
940	\|\| VM_FF_IS_ANY_SET(pVM, VM_FF_EMT_RENDEZVOUS \| VMCPU_FF_REQUEST \| VM_FF_CHECK_VM_STATE))
941	{
942	if (VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_DBGF))
943	break;
944
945	int rc;
946	if (VM_FF_IS_SET(pVM, VM_FF_EMT_RENDEZVOUS))
947	rc = VMMR3EmtRendezvousFF(pVM, pVCpu);
948	else if ( VM_FF_IS_SET(pVM, VM_FF_REQUEST)
949	\|\| VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_REQUEST))
950	{
951	LogFlow(("dbgfR3CpuWait: Processes requests...\n"));
952	rc = VMR3ReqProcessU(pVM->pUVM, VMCPUID_ANY, false /fPriorityOnly/);
953	if (rc == VINF_SUCCESS)
954	rc = VMR3ReqProcessU(pVM->pUVM, pVCpu->idCpu, false /fPriorityOnly/);
955	LogFlow(("dbgfR3CpuWait: VMR3ReqProcess -> %Rrc rcRet=%Rrc\n", rc, rcRet));
956	}
957	else if (VM_FF_IS_SET(pVM, VM_FF_CHECK_VM_STATE))
958	{
959	VMSTATE enmState = VMR3GetState(pVM);
960	switch (enmState)
961	{
962	case VMSTATE_FATAL_ERROR:
963	case VMSTATE_FATAL_ERROR_LS:
964	case VMSTATE_GURU_MEDITATION:
965	case VMSTATE_GURU_MEDITATION_LS:
966	rc = VINF_EM_SUSPEND;
967	break;
968	case VMSTATE_DESTROYING:
969	rc = VINF_EM_TERMINATE;
970	break;
971	default:
972	rc = VERR_DBGF_IPE_1;
973	AssertMsgFailed(("%s\n", VMGetStateName(enmState)));
974	}
975	}
976	else
977	rc = VINF_SUCCESS;
978	if (rc >= VINF_EM_FIRST && rc <= VINF_EM_LAST)
979	{
980	switch (rc)
981	{
982	case VINF_EM_DBG_BREAKPOINT:
983	case VINF_EM_DBG_STEPPED:
984	case VINF_EM_DBG_STEP:
985	case VINF_EM_DBG_STOP:
986	case VINF_EM_DBG_EVENT:
987	AssertMsgFailed(("rc=%Rrc\n", rc));
988	break;
989
990	/* return straight away */
991	case VINF_EM_TERMINATE:
992	case VINF_EM_OFF:
993	LogFlow(("dbgfR3CpuWait: returns %Rrc\n", rc));
994	ASMAtomicWriteBool(&pUVCpu->dbgf.s.fStopped, false);
995	return rc;
996
997	/* remember return code. */
998	default:
999	AssertReleaseMsgFailed(("rc=%Rrc is not in the switch!\n", rc));
1000	RT_FALL_THRU();
1001	case VINF_EM_RESET:
1002	case VINF_EM_SUSPEND:
1003	case VINF_EM_HALT:
1004	case VINF_EM_RESUME:
1005	case VINF_EM_RESCHEDULE:
1006	case VINF_EM_RESCHEDULE_REM:
1007	case VINF_EM_RESCHEDULE_RAW:
1008	if (rc < rcRet \|\| rcRet == VINF_SUCCESS)
1009	rcRet = rc;
1010	break;
1011	}
1012	}
1013	else if (RT_FAILURE(rc))
1014	{
1015	LogFlow(("dbgfR3CpuWait: returns %Rrc\n", rc));
1016	ASMAtomicWriteBool(&pUVCpu->dbgf.s.fStopped, false);
1017	return rc;
1018	}
1019	}
1020	else if (pVM->dbgf.s.fAttached)
1021	{
1022	int rc = VMR3WaitU(pUVCpu);
1023	if (RT_FAILURE(rc))
1024	{
1025	LogFlow(("dbgfR3CpuWait: returns %Rrc (VMR3WaitU)\n", rc));
1026	ASMAtomicWriteBool(&pUVCpu->dbgf.s.fStopped, false);
1027	return rc;
1028	}
1029	}
1030	else
1031	{
1032	LogFlow(("dbgfR3CpuWait: Debugger detached, continuing normal execution (%Rrc)\n", rcRet));
1033	ASMAtomicWriteBool(&pUVCpu->dbgf.s.fStopped, false);
1034	return rcRet;
1035	}
1036	}
1037
1038	/*
1039	* Process the command.
1040	*/
1041	VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_DBGF);
1042	bool fResumeExecution;
1043	DBGFCMDDATA CmdData = pUVCpu->dbgf.s.DbgfCmdData;
1044	DBGFCMD enmCmd = dbgfR3CpuGetCmd(pUVCpu);
1045	int rc = dbgfR3CpuCmd(pVCpu, enmCmd, &CmdData, &fResumeExecution);
1046	if (fResumeExecution)
1047	{
1048	if (RT_FAILURE(rc))
1049	rcRet = rc;
1050	else if ( rc >= VINF_EM_FIRST
1051	&& rc <= VINF_EM_LAST
1052	&& (rc < rcRet \|\| rcRet == VINF_SUCCESS))
1053	rcRet = rc;
1054	LogFlow(("dbgfR3CpuWait: returns %Rrc\n", rcRet));
1055	ASMAtomicWriteBool(&pUVCpu->dbgf.s.fStopped, false);
1056	return rcRet;
1057	}
1058	}
1059	}
1060
1061
1062	/**
1063	* Executes command from debugger.
1064	*
1065	* The caller is responsible for waiting or resuming execution based on the
1066	* value returned in the *pfResumeExecution indicator.
1067	*
1068	* @returns VBox status code. (clearify!)
1069	* @param pVCpu The cross context vCPU structure.
1070	* @param enmCmd The command in question.
1071	* @param pCmdData Pointer to the command data.
1072	* @param pfResumeExecution Where to store the resume execution / continue waiting indicator.
1073	*/
1074	static int dbgfR3CpuCmd(PVMCPU pVCpu, DBGFCMD enmCmd, PDBGFCMDDATA pCmdData, bool *pfResumeExecution)
1075	{
1076	RT_NOREF(pCmdData); /* for later */
1077
1078	/*
1079	* The cases in this switch returns directly if no event to send.
1080	*/
1081	DBGFEVENTTYPE enmEvent;
1082	DBGFEVENTCTX enmCtx = DBGFEVENTCTX_INVALID;
1083	switch (enmCmd)
1084	{
1085	/*
1086	* Halt is answered by an event say that we've halted.
1087	*/
1088	case DBGFCMD_HALT:
1089	{
1090	*pfResumeExecution = false;
1091	enmEvent = DBGFEVENT_HALT_DONE;
1092	break;
1093	}
1094
1095
1096	/*
1097	* Resume is not answered, we just resume execution.
1098	*/
1099	case DBGFCMD_GO:
1100	{
1101	pVCpu->dbgf.s.fSingleSteppingRaw = false;
1102	*pfResumeExecution = true;
1103	return VINF_SUCCESS;
1104	}
1105
1106	/** @todo implement (and define) the rest of the commands. */
1107
1108	/*
1109	* Single step, with trace into.
1110	*/
1111	case DBGFCMD_SINGLE_STEP:
1112	{
1113	Log2(("Single step\n"));
1114	PVM pVM = pVCpu->CTX_SUFF(pVM);
1115	if (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_OVER)
1116	{
1117	if (dbgfStepGetCurInstrType(pVM, pVCpu) == DBGFSTEPINSTRTYPE_CALL)
1118	pVM->dbgf.s.SteppingFilter.uCallDepth++;
1119	}
1120	if (pVM->dbgf.s.SteppingFilter.cMaxSteps > 0)
1121	{
1122	pVCpu->dbgf.s.fSingleSteppingRaw = true;
1123	*pfResumeExecution = true;
1124	return VINF_EM_DBG_STEP;
1125	}
1126	/* Stop after zero steps. Nonsense, but whatever. */
1127	pVM->dbgf.s.SteppingFilter.idCpu = NIL_VMCPUID;
1128	*pfResumeExecution = false;
1129	enmCtx = dbgfR3FigureEventCtx(pVCpu);
1130	enmEvent = enmCtx != DBGFEVENTCTX_HYPER ? DBGFEVENT_STEPPED : DBGFEVENT_STEPPED_HYPER;
1131	break;
1132	}
1133
1134	/*
1135	* Default is to send an invalid command event.
1136	*/
1137	default:
1138	{
1139	*pfResumeExecution = false;
1140	enmEvent = DBGFEVENT_INVALID_COMMAND;
1141	break;
1142	}
1143	}
1144
1145	/*
1146	* Send the pending event.
1147	*/
1148	Log2(("DBGF: Emulation thread: sending event %d\n", enmEvent));
1149	int rc = dbgfR3SendEventNoWait(pVCpu->CTX_SUFF(pVM), pVCpu, enmEvent, enmCtx);
1150	AssertRCStmt(rc, *pfResumeExecution = true);
1151	return rc;
1152	}
1153
1154
1155	/**
1156	* @callback_method_impl{FNVMMEMTRENDEZVOUS,
1157	* EMT rendezvous worker for DBGFR3Attach - only called on one EMT.}
1158	*/
1159	static DECLCALLBACK(VBOXSTRICTRC) dbgfR3Attach(PVM pVM, PVMCPU pVCpu, void *pvUser)
1160	{
1161	PUVM pUVM = pVM->pUVM;
1162	int prcAttach = (int )pvUser;
1163	RT_NOREF(pVCpu);
1164
1165	if (pVM->dbgf.s.fAttached)
1166	{
1167	Log(("dbgfR3Attach: Debugger already attached\n"));
1168	*prcAttach = VERR_DBGF_ALREADY_ATTACHED;
1169	return VINF_SUCCESS;
1170	}
1171
1172	/*
1173	* The per-CPU bits.
1174	*/
1175	for (uint32_t i = 0; i < pUVM->cCpus; i++)
1176	{
1177	PUVMCPU pUVCpu = &pUVM->aCpus[i];
1178
1179	pUVCpu->dbgf.s.enmDbgfCmd = DBGFCMD_NO_COMMAND;
1180	RT_ZERO(pUVCpu->dbgf.s.DbgfCmdData);
1181	}
1182
1183	/*
1184	* Init of the VM -> Debugger communication part living in the global VM structure.
1185	*/
1186	pUVM->dbgf.s.cDbgEvtMax = pVM->cCpus * 5 + 10; /* Initial size of event ring, increased when being full. */
1187	pUVM->dbgf.s.idxDbgEvtWrite = 0;
1188	pUVM->dbgf.s.idxDbgEvtRead = 0;
1189	pUVM->dbgf.s.hEvtWait = NIL_RTSEMEVENT;
1190	pUVM->dbgf.s.hEvtRingBufFull = NIL_RTSEMEVENTMULTI;
1191	pUVM->dbgf.s.hMtxDbgEvtWr = NIL_RTSEMFASTMUTEX;
1192	int rc;
1193	pUVM->dbgf.s.paDbgEvts = (PDBGFEVENT)MMR3HeapAllocU(pUVM, MM_TAG_DBGF, pUVM->dbgf.s.cDbgEvtMax * sizeof(DBGFEVENT));
1194	if (pUVM->dbgf.s.paDbgEvts)
1195	{
1196	rc = RTSemEventCreate(&pUVM->dbgf.s.hEvtWait);
1197	if (RT_SUCCESS(rc))
1198	{
1199	rc = RTSemFastMutexCreate(&pUVM->dbgf.s.hMtxDbgEvtWr);
1200	if (RT_SUCCESS(rc))
1201	{
1202	rc = RTSemEventMultiCreate(&pUVM->dbgf.s.hEvtRingBufFull);
1203	if (RT_SUCCESS(rc))
1204	{
1205	/*
1206	* At last, set the attached flag.
1207	*/
1208	ASMAtomicWriteBool(&pVM->dbgf.s.fAttached, true);
1209	*prcAttach = VINF_SUCCESS;
1210	return VINF_SUCCESS;
1211	}
1212
1213	RTSemFastMutexDestroy(pUVM->dbgf.s.hMtxDbgEvtWr);
1214	pUVM->dbgf.s.hMtxDbgEvtWr = NIL_RTSEMFASTMUTEX;
1215	}
1216	RTSemEventDestroy(pUVM->dbgf.s.hEvtWait);
1217	pUVM->dbgf.s.hEvtWait = NIL_RTSEMEVENT;
1218	}
1219	}
1220	else
1221	rc = VERR_NO_MEMORY;
1222
1223	*prcAttach = rc;
1224	return VINF_SUCCESS;
1225	}
1226
1227
1228	/**
1229	* Attaches a debugger to the specified VM.
1230	*
1231	* Only one debugger at a time.
1232	*
1233	* @returns VBox status code.
1234	* @param pUVM The user mode VM handle.
1235	*/
1236	VMMR3DECL(int) DBGFR3Attach(PUVM pUVM)
1237	{
1238	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1239	PVM pVM = pUVM->pVM;
1240	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1241
1242	/*
1243	* Call the VM, use EMT rendezvous for serialization.
1244	*/
1245	int rcAttach = VERR_IPE_UNINITIALIZED_STATUS;
1246	int rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE \| VMMEMTRENDEZVOUS_FLAGS_PRIORITY, dbgfR3Attach, &rcAttach);
1247	if (RT_SUCCESS(rc))
1248	rc = rcAttach;
1249
1250	return rc;
1251	}
1252
1253
1254	/**
1255	* @callback_method_impl{FNVMMEMTRENDEZVOUS,
1256	* EMT rendezvous worker for DBGFR3Detach - called on all EMTs (why?).}
1257	*/
1258	static DECLCALLBACK(VBOXSTRICTRC) dbgfR3Detach(PVM pVM, PVMCPU pVCpu, void *pvUser)
1259	{
1260	if (pVCpu->idCpu == 0)
1261	{
1262	PUVM pUVM = (PUVM)pvUser;
1263
1264	/*
1265	* Per-CPU cleanup.
1266	*/
1267	for (VMCPUID i = 0; i < pUVM->cCpus; i++)
1268	{
1269	PUVMCPU pUVCpu = &pUVM->aCpus[i];
1270
1271	pUVCpu->dbgf.s.enmDbgfCmd = DBGFCMD_NO_COMMAND;
1272	RT_ZERO(pUVCpu->dbgf.s.DbgfCmdData);
1273	}
1274
1275	/*
1276	* De-init of the VM -> Debugger communication part living in the global VM structure.
1277	*/
1278	if (pUVM->dbgf.s.paDbgEvts)
1279	{
1280	MMR3HeapFree(pUVM->dbgf.s.paDbgEvts);
1281	pUVM->dbgf.s.paDbgEvts = NULL;
1282	}
1283
1284	if (pUVM->dbgf.s.hEvtWait != NIL_RTSEMEVENT)
1285	{
1286	RTSemEventDestroy(pUVM->dbgf.s.hEvtWait);
1287	pUVM->dbgf.s.hEvtWait = NIL_RTSEMEVENT;
1288	}
1289
1290	if (pUVM->dbgf.s.hMtxDbgEvtWr != NIL_RTSEMFASTMUTEX)
1291	{
1292	RTSemFastMutexDestroy(pUVM->dbgf.s.hMtxDbgEvtWr);
1293	pUVM->dbgf.s.hMtxDbgEvtWr = NIL_RTSEMFASTMUTEX;
1294	}
1295
1296	if (pUVM->dbgf.s.hEvtRingBufFull != NIL_RTSEMEVENTMULTI)
1297	{
1298	RTSemEventMultiDestroy(pUVM->dbgf.s.hEvtRingBufFull);
1299	pUVM->dbgf.s.hEvtRingBufFull = NIL_RTSEMEVENTMULTI;
1300	}
1301
1302	pUVM->dbgf.s.cDbgEvtMax = 0;
1303	pUVM->dbgf.s.idxDbgEvtWrite = 0;
1304	pUVM->dbgf.s.idxDbgEvtRead = 0;
1305	pUVM->dbgf.s.hEvtWait = NIL_RTSEMEVENT;
1306	pUVM->dbgf.s.hEvtRingBufFull = NIL_RTSEMEVENTMULTI;
1307	pUVM->dbgf.s.hMtxDbgEvtWr = NIL_RTSEMFASTMUTEX;
1308
1309	ASMAtomicWriteBool(&pVM->dbgf.s.fAttached, false);
1310	}
1311
1312	return VINF_SUCCESS;
1313	}
1314
1315
1316	/**
1317	* Detaches a debugger from the specified VM.
1318	*
1319	* Caller must be attached to the VM.
1320	*
1321	* @returns VBox status code.
1322	* @param pUVM The user mode VM handle.
1323	*/
1324	VMMR3DECL(int) DBGFR3Detach(PUVM pUVM)
1325	{
1326	LogFlow(("DBGFR3Detach:\n"));
1327
1328	/*
1329	* Validate input. The UVM handle shall be valid, the VM handle might be
1330	* in the processes of being destroyed already, so deal quietly with that.
1331	*/
1332	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1333	PVM pVM = pUVM->pVM;
1334	if (!VM_IS_VALID_EXT(pVM))
1335	return VERR_INVALID_VM_HANDLE;
1336
1337	/*
1338	* Check if attached.
1339	*/
1340	if (!pVM->dbgf.s.fAttached)
1341	return VERR_DBGF_NOT_ATTACHED;
1342
1343	return VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ALL_AT_ONCE \| VMMEMTRENDEZVOUS_FLAGS_PRIORITY, dbgfR3Detach, pUVM);
1344	}
1345
1346
1347	/**
1348	* Wait for a debug event.
1349	*
1350	* @returns VBox status code. Will not return VBOX_INTERRUPTED.
1351	* @param pUVM The user mode VM handle.
1352	* @param cMillies Number of millis to wait.
1353	* @param pEvent Where to store the event data.
1354	*/
1355	VMMR3DECL(int) DBGFR3EventWait(PUVM pUVM, RTMSINTERVAL cMillies, PDBGFEVENT pEvent)
1356	{
1357	/*
1358	* Check state.
1359	*/
1360	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1361	PVM pVM = pUVM->pVM;
1362	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1363	AssertReturn(pVM->dbgf.s.fAttached, VERR_DBGF_NOT_ATTACHED);
1364
1365	RT_BZERO(pEvent, sizeof(*pEvent));
1366
1367	/*
1368	* Wait for an event to arrive if there are none.
1369	*/
1370	int rc = VINF_SUCCESS;
1371	uint32_t idxDbgEvtRead = ASMAtomicReadU32(&pUVM->dbgf.s.idxDbgEvtRead);
1372	if (idxDbgEvtRead == ASMAtomicReadU32(&pUVM->dbgf.s.idxDbgEvtWrite))
1373	{
1374	do
1375	{
1376	rc = RTSemEventWait(pUVM->dbgf.s.hEvtWait, cMillies);
1377	} while ( RT_SUCCESS(rc)
1378	&& idxDbgEvtRead == ASMAtomicReadU32(&pUVM->dbgf.s.idxDbgEvtWrite));
1379	}
1380
1381	if (RT_SUCCESS(rc))
1382	{
1383	Assert(idxDbgEvtRead != ASMAtomicReadU32(&pUVM->dbgf.s.idxDbgEvtWrite));
1384
1385	uint32_t const cDbgEvtMax = RT_MAX(1, pUVM->dbgf.s.cDbgEvtMax);
1386	memcpy(pEvent, &pUVM->dbgf.s.paDbgEvts[idxDbgEvtRead % cDbgEvtMax], sizeof(*pEvent));
1387	ASMAtomicWriteU32(&pUVM->dbgf.s.idxDbgEvtRead, (idxDbgEvtRead + 1) % cDbgEvtMax);
1388	}
1389
1390	Log2(("DBGFR3EventWait: rc=%Rrc (event type %d)\n", rc, pEvent->enmType));
1391	return rc;
1392	}
1393
1394
1395	/**
1396	* Halts VM execution.
1397	*
1398	* After calling this the VM isn't actually halted till an DBGFEVENT_HALT_DONE
1399	* arrives. Until that time it's not possible to issue any new commands.
1400	*
1401	* @returns VBox status code.
1402	* @retval VWRN_DBGF_ALREADY_HALTED if @a idCpu is VMCPUID_ALL and all vCPUs
1403	* are halted.
1404	* @param pUVM The user mode VM handle.
1405	* @param idCpu The vCPU to halt, VMCPUID_ALL halts all still running vCPUs.
1406	*/
1407	VMMR3DECL(int) DBGFR3Halt(PUVM pUVM, VMCPUID idCpu)
1408	{
1409	/*
1410	* Check state.
1411	*/
1412	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1413	PVM pVM = pUVM->pVM;
1414	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1415	AssertReturn(pVM->dbgf.s.fAttached, VERR_DBGF_NOT_ATTACHED);
1416	AssertReturn(idCpu == VMCPUID_ALL \|\| idCpu < pVM->cCpus, VERR_INVALID_CPU_ID);
1417
1418	/*
1419	* Halt the requested CPUs as needed.
1420	*/
1421	int rc;
1422	if (idCpu != VMCPUID_ALL)
1423	{
1424	PUVMCPU pUVCpu = &pUVM->aCpus[idCpu];
1425	if (!dbgfR3CpuIsHalted(pUVCpu))
1426	{
1427	dbgfR3CpuSetCmdAndNotify(pUVCpu, DBGFCMD_HALT);
1428	rc = VINF_SUCCESS;
1429	}
1430	else
1431	rc = VWRN_DBGF_ALREADY_HALTED;
1432	}
1433	else
1434	{
1435	rc = VWRN_DBGF_ALREADY_HALTED;
1436	for (VMCPUID i = 0; i < pUVM->cCpus; i++)
1437	{
1438	PUVMCPU pUVCpu = &pUVM->aCpus[i];
1439	if (!dbgfR3CpuIsHalted(pUVCpu))
1440	{
1441	dbgfR3CpuSetCmdAndNotify(pUVCpu, DBGFCMD_HALT);
1442	rc = VINF_SUCCESS;
1443	}
1444	}
1445	}
1446
1447	return rc;
1448	}
1449
1450
1451	/**
1452	* Checks if any of the specified vCPUs have been halted by the debugger.
1453	*
1454	* @returns True if at least one halted vCPUs.
1455	* @returns False if no halted vCPUs.
1456	* @param pUVM The user mode VM handle.
1457	* @param idCpu The CPU id to check for, VMCPUID_ALL will return true if
1458	* at least a single vCPU is halted in the debugger.
1459	*/
1460	VMMR3DECL(bool) DBGFR3IsHalted(PUVM pUVM, VMCPUID idCpu)
1461	{
1462	UVM_ASSERT_VALID_EXT_RETURN(pUVM, false);
1463	PVM pVM = pUVM->pVM;
1464	VM_ASSERT_VALID_EXT_RETURN(pVM, false);
1465	AssertReturn(pVM->dbgf.s.fAttached, false);
1466
1467	return dbgfR3CpuAreAnyHaltedByCpuId(pUVM, idCpu);
1468	}
1469
1470
1471	/**
1472	* Checks if the debugger can wait for events or not.
1473	*
1474	* This function is only used by lazy, multiplexing debuggers. :-)
1475	*
1476	* @returns VBox status code.
1477	* @retval VINF_SUCCESS if waitable.
1478	* @retval VERR_SEM_OUT_OF_TURN if not waitable.
1479	* @retval VERR_INVALID_VM_HANDLE if the VM is being (/ has been) destroyed
1480	* (not asserted) or if the handle is invalid (asserted).
1481	* @retval VERR_DBGF_NOT_ATTACHED if not attached.
1482	*
1483	* @param pUVM The user mode VM handle.
1484	*/
1485	VMMR3DECL(int) DBGFR3QueryWaitable(PUVM pUVM)
1486	{
1487	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1488
1489	/* Note! There is a slight race here, unfortunately. */
1490	PVM pVM = pUVM->pVM;
1491	if (!RT_VALID_PTR(pVM))
1492	return VERR_INVALID_VM_HANDLE;
1493	if (pVM->enmVMState >= VMSTATE_DESTROYING)
1494	return VERR_INVALID_VM_HANDLE;
1495	if (!pVM->dbgf.s.fAttached)
1496	return VERR_DBGF_NOT_ATTACHED;
1497
1498	/** @todo was: if (!RTSemPongShouldWait(...)) return VERR_SEM_OUT_OF_TURN; */
1499	return VINF_SUCCESS;
1500	}
1501
1502
1503	/**
1504	* Resumes VM execution.
1505	*
1506	* There is no receipt event on this command.
1507	*
1508	* @returns VBox status code.
1509	* @retval VWRN_DBGF_ALREADY_RUNNING if the specified vCPUs are all running.
1510	* @param pUVM The user mode VM handle.
1511	* @param idCpu The vCPU to resume, VMCPUID_ALL resumes all still halted vCPUs.
1512	*/
1513	VMMR3DECL(int) DBGFR3Resume(PUVM pUVM, VMCPUID idCpu)
1514	{
1515	/*
1516	* Validate input and attachment state.
1517	*/
1518	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1519	PVM pVM = pUVM->pVM;
1520	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1521	AssertReturn(pVM->dbgf.s.fAttached, VERR_DBGF_NOT_ATTACHED);
1522
1523	/*
1524	* Ping the halted emulation threads, telling them to run.
1525	*/
1526	int rc = VWRN_DBGF_ALREADY_RUNNING;
1527	if (idCpu != VMCPUID_ALL)
1528	{
1529	PUVMCPU pUVCpu = &pUVM->aCpus[idCpu];
1530	if (dbgfR3CpuIsHalted(pUVCpu))
1531	{
1532	rc = dbgfR3CpuSetCmdAndNotify(pUVCpu, DBGFCMD_GO);
1533	AssertRC(rc);
1534	}
1535	}
1536	else
1537	{
1538	for (VMCPUID i = 0; i < pUVM->cCpus; i++)
1539	{
1540	PUVMCPU pUVCpu = &pUVM->aCpus[i];
1541	if (dbgfR3CpuIsHalted(pUVCpu))
1542	{
1543	int rc2 = dbgfR3CpuSetCmdAndNotify(pUVCpu, DBGFCMD_GO);
1544	AssertRC(rc2);
1545	if (rc == VWRN_DBGF_ALREADY_RUNNING \|\| RT_FAILURE(rc2))
1546	rc = rc2;
1547	}
1548	}
1549	}
1550
1551	return rc;
1552	}
1553
1554
1555	/**
1556	* Classifies the current instruction.
1557	*
1558	* @returns Type of instruction.
1559	* @param pVM The cross context VM structure.
1560	* @param pVCpu The current CPU.
1561	* @thread EMT(pVCpu)
1562	*/
1563	static DBGFSTEPINSTRTYPE dbgfStepGetCurInstrType(PVM pVM, PVMCPU pVCpu)
1564	{
1565	/*
1566	* Read the instruction.
1567	*/
1568	size_t cbRead = 0;
1569	uint8_t abOpcode[16] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
1570	int rc = PGMR3DbgReadGCPtr(pVM, abOpcode, CPUMGetGuestFlatPC(pVCpu), sizeof(abOpcode) - 1, 0 /fFlags/, &cbRead);
1571	if (RT_SUCCESS(rc))
1572	{
1573	/*
1574	* Do minimal parsing. No real need to involve the disassembler here.
1575	*/
1576	uint8_t *pb = abOpcode;
1577	for (;;)
1578	{
1579	switch (*pb++)
1580	{
1581	default:
1582	return DBGFSTEPINSTRTYPE_OTHER;
1583
1584	case 0xe8: /* call rel16/32 */
1585	case 0x9a: /* call farptr */
1586	case 0xcc: /* int3 */
1587	case 0xcd: /* int xx */
1588	// case 0xce: /* into */
1589	return DBGFSTEPINSTRTYPE_CALL;
1590
1591	case 0xc2: /* ret xx */
1592	case 0xc3: /* ret */
1593	case 0xca: /* retf xx */
1594	case 0xcb: /* retf */
1595	case 0xcf: /* iret */
1596	return DBGFSTEPINSTRTYPE_RET;
1597
1598	case 0xff:
1599	if ( ((pb >> X86_MODRM_REG_SHIFT) & X86_MODRM_REG_SMASK) == 2 / call indir */
1600	\|\| ((pb >> X86_MODRM_REG_SHIFT) & X86_MODRM_REG_SMASK) == 3) / call indir-farptr */
1601	return DBGFSTEPINSTRTYPE_CALL;
1602	return DBGFSTEPINSTRTYPE_OTHER;
1603
1604	case 0x0f:
1605	switch (*pb++)
1606	{
1607	case 0x05: /* syscall */
1608	case 0x34: /* sysenter */
1609	return DBGFSTEPINSTRTYPE_CALL;
1610	case 0x07: /* sysret */
1611	case 0x35: /* sysexit */
1612	return DBGFSTEPINSTRTYPE_RET;
1613	}
1614	break;
1615
1616	/* Must handle some REX prefixes. So we do all normal prefixes. */
1617	case 0x40: case 0x41: case 0x42: case 0x43: case 0x44: case 0x45: case 0x46: case 0x47:
1618	case 0x48: case 0x49: case 0x4a: case 0x4b: case 0x4c: case 0x4d: case 0x4e: case 0x4f:
1619	if (!CPUMIsGuestIn64BitCode(pVCpu))
1620	return DBGFSTEPINSTRTYPE_OTHER;
1621	break;
1622
1623	case 0x2e: /* CS */
1624	case 0x36: /* SS */
1625	case 0x3e: /* DS */
1626	case 0x26: /* ES */
1627	case 0x64: /* FS */
1628	case 0x65: /* GS */
1629	case 0x66: /* op size */
1630	case 0x67: /* addr size */
1631	case 0xf0: /* lock */
1632	case 0xf2: /* REPNZ */
1633	case 0xf3: /* REPZ */
1634	break;
1635	}
1636	}
1637	}
1638
1639	return DBGFSTEPINSTRTYPE_INVALID;
1640	}
1641
1642
1643	/**
1644	* Checks if the stepping has reached a stop point.
1645	*
1646	* Called when raising a stepped event.
1647	*
1648	* @returns true if the event should be raised, false if we should take one more
1649	* step first.
1650	* @param pVM The cross context VM structure.
1651	* @param pVCpu The cross context per CPU structure of the calling EMT.
1652	* @thread EMT(pVCpu)
1653	*/
1654	static bool dbgfStepAreWeThereYet(PVM pVM, PVMCPU pVCpu)
1655	{
1656	/*
1657	* Check valid pVCpu and that it matches the CPU one stepping.
1658	*/
1659	if (pVCpu)
1660	{
1661	if (pVCpu->idCpu == pVM->dbgf.s.SteppingFilter.idCpu)
1662	{
1663	/*
1664	* Increase the number of steps and see if we've reached the max.
1665	*/
1666	pVM->dbgf.s.SteppingFilter.cSteps++;
1667	if (pVM->dbgf.s.SteppingFilter.cSteps < pVM->dbgf.s.SteppingFilter.cMaxSteps)
1668	{
1669	/*
1670	* Check PC and SP address filtering.
1671	*/
1672	if (pVM->dbgf.s.SteppingFilter.fFlags & (DBGF_STEP_F_STOP_ON_ADDRESS \| DBGF_STEP_F_STOP_ON_STACK_POP))
1673	{
1674	if ( (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_ON_ADDRESS)
1675	&& pVM->dbgf.s.SteppingFilter.AddrPc == CPUMGetGuestFlatPC(pVCpu))
1676	return true;
1677	if ( (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_ON_STACK_POP)
1678	&& CPUMGetGuestFlatSP(pVCpu) - pVM->dbgf.s.SteppingFilter.AddrStackPop
1679	< pVM->dbgf.s.SteppingFilter.cbStackPop)
1680	return true;
1681	}
1682
1683	/*
1684	* Do step-over filtering separate from the step-into one.
1685	*/
1686	if (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_OVER)
1687	{
1688	DBGFSTEPINSTRTYPE enmType = dbgfStepGetCurInstrType(pVM, pVCpu);
1689	switch (enmType)
1690	{
1691	default:
1692	if ( pVM->dbgf.s.SteppingFilter.uCallDepth != 0
1693	\|\| (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_FILTER_MASK))
1694	break;
1695	return true;
1696	case DBGFSTEPINSTRTYPE_CALL:
1697	if ( (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_ON_CALL)
1698	&& pVM->dbgf.s.SteppingFilter.uCallDepth == 0)
1699	return true;
1700	pVM->dbgf.s.SteppingFilter.uCallDepth++;
1701	break;
1702	case DBGFSTEPINSTRTYPE_RET:
1703	if (pVM->dbgf.s.SteppingFilter.uCallDepth == 0)
1704	{
1705	if (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_ON_RET)
1706	return true;
1707	/* If after return, we use the cMaxStep limit to stop the next time. */
1708	if (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_AFTER_RET)
1709	pVM->dbgf.s.SteppingFilter.cMaxSteps = pVM->dbgf.s.SteppingFilter.cSteps + 1;
1710	}
1711	else if (pVM->dbgf.s.SteppingFilter.uCallDepth > 0)
1712	pVM->dbgf.s.SteppingFilter.uCallDepth--;
1713	break;
1714	}
1715	return false;
1716	}
1717	/*
1718	* Filtered step-into.
1719	*/
1720	else if ( pVM->dbgf.s.SteppingFilter.fFlags
1721	& (DBGF_STEP_F_STOP_ON_CALL \| DBGF_STEP_F_STOP_ON_RET \| DBGF_STEP_F_STOP_AFTER_RET))
1722	{
1723	DBGFSTEPINSTRTYPE enmType = dbgfStepGetCurInstrType(pVM, pVCpu);
1724	switch (enmType)
1725	{
1726	default:
1727	break;
1728	case DBGFSTEPINSTRTYPE_CALL:
1729	if (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_ON_CALL)
1730	return true;
1731	break;
1732	case DBGFSTEPINSTRTYPE_RET:
1733	if (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_ON_RET)
1734	return true;
1735	/* If after return, we use the cMaxStep limit to stop the next time. */
1736	if (pVM->dbgf.s.SteppingFilter.fFlags & DBGF_STEP_F_STOP_AFTER_RET)
1737	pVM->dbgf.s.SteppingFilter.cMaxSteps = pVM->dbgf.s.SteppingFilter.cSteps + 1;
1738	break;
1739	}
1740	return false;
1741	}
1742	}
1743	}
1744	}
1745
1746	return true;
1747	}
1748
1749
1750	/**
1751	* Step Into.
1752	*
1753	* A single step event is generated from this command.
1754	* The current implementation is not reliable, so don't rely on the event coming.
1755	*
1756	* @returns VBox status code.
1757	* @param pUVM The user mode VM handle.
1758	* @param idCpu The ID of the CPU to single step on.
1759	*/
1760	VMMR3DECL(int) DBGFR3Step(PUVM pUVM, VMCPUID idCpu)
1761	{
1762	return DBGFR3StepEx(pUVM, idCpu, DBGF_STEP_F_INTO, NULL, NULL, 0, 1);
1763	}
1764
1765
1766	/**
1767	* Full fleged step.
1768	*
1769	* This extended stepping API allows for doing multiple steps before raising an
1770	* event, helping implementing step over, step out and other more advanced
1771	* features.
1772	*
1773	* Like the DBGFR3Step() API, this will normally generate a DBGFEVENT_STEPPED or
1774	* DBGFEVENT_STEPPED_EVENT. However the stepping may be interrupted by other
1775	* events, which will abort the stepping.
1776	*
1777	* The stop on pop area feature is for safeguarding step out.
1778	*
1779	* Please note though, that it will always use stepping and never breakpoints.
1780	* While this allows for a much greater flexibility it can at times be rather
1781	* slow.
1782	*
1783	* @returns VBox status code.
1784	* @param pUVM The user mode VM handle.
1785	* @param idCpu The ID of the CPU to single step on.
1786	* @param fFlags Flags controlling the stepping, DBGF_STEP_F_XXX.
1787	* Either DBGF_STEP_F_INTO or DBGF_STEP_F_OVER must
1788	* always be specified.
1789	* @param pStopPcAddr Address to stop executing at. Completely ignored
1790	* unless DBGF_STEP_F_STOP_ON_ADDRESS is specified.
1791	* @param pStopPopAddr Stack address that SP must be lower than when
1792	* performing DBGF_STEP_F_STOP_ON_STACK_POP filtering.
1793	* @param cbStopPop The range starting at @a pStopPopAddr which is
1794	* considered to be within the same thread stack. Note
1795	* that the API allows @a pStopPopAddr and @a cbStopPop
1796	* to form an area that wraps around and it will
1797	* consider the part starting at 0 as included.
1798	* @param cMaxSteps The maximum number of steps to take. This is to
1799	* prevent stepping for ever, so passing UINT32_MAX is
1800	* not recommended.
1801	*
1802	* @remarks The two address arguments must be guest context virtual addresses,
1803	* or HMA. The code doesn't make much of a point of out HMA, though.
1804	*/
1805	VMMR3DECL(int) DBGFR3StepEx(PUVM pUVM, VMCPUID idCpu, uint32_t fFlags, PCDBGFADDRESS pStopPcAddr,
1806	PCDBGFADDRESS pStopPopAddr, RTGCUINTPTR cbStopPop, uint32_t cMaxSteps)
1807	{
1808	/*
1809	* Check state.
1810	*/
1811	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1812	PVM pVM = pUVM->pVM;
1813	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1814	AssertReturn(idCpu < pVM->cCpus, VERR_INVALID_PARAMETER);
1815	AssertReturn(!(fFlags & ~DBGF_STEP_F_VALID_MASK), VERR_INVALID_FLAGS);
1816	AssertReturn(RT_BOOL(fFlags & DBGF_STEP_F_INTO) != RT_BOOL(fFlags & DBGF_STEP_F_OVER), VERR_INVALID_FLAGS);
1817	if (fFlags & DBGF_STEP_F_STOP_ON_ADDRESS)
1818	{
1819	AssertReturn(RT_VALID_PTR(pStopPcAddr), VERR_INVALID_POINTER);
1820	AssertReturn(DBGFADDRESS_IS_VALID(pStopPcAddr), VERR_INVALID_PARAMETER);
1821	AssertReturn(DBGFADDRESS_IS_VIRT_GC(pStopPcAddr), VERR_INVALID_PARAMETER);
1822	}
1823	AssertReturn(!(fFlags & DBGF_STEP_F_STOP_ON_STACK_POP) \|\| RT_VALID_PTR(pStopPopAddr), VERR_INVALID_POINTER);
1824	if (fFlags & DBGF_STEP_F_STOP_ON_STACK_POP)
1825	{
1826	AssertReturn(RT_VALID_PTR(pStopPopAddr), VERR_INVALID_POINTER);
1827	AssertReturn(DBGFADDRESS_IS_VALID(pStopPopAddr), VERR_INVALID_PARAMETER);
1828	AssertReturn(DBGFADDRESS_IS_VIRT_GC(pStopPopAddr), VERR_INVALID_PARAMETER);
1829	AssertReturn(cbStopPop > 0, VERR_INVALID_PARAMETER);
1830	}
1831
1832	AssertReturn(pVM->dbgf.s.fAttached, VERR_DBGF_NOT_ATTACHED);
1833	PUVMCPU pUVCpu = &pUVM->aCpus[idCpu];
1834	if (RT_LIKELY(dbgfR3CpuIsHalted(pUVCpu)))
1835	{ /* likely */ }
1836	else
1837	return VERR_SEM_OUT_OF_TURN;
1838	Assert(pVM->dbgf.s.SteppingFilter.idCpu == NIL_VMCPUID);
1839
1840	/*
1841	* Send the emulation thread a single-step command.
1842	*/
1843	if (fFlags == DBGF_STEP_F_INTO)
1844	pVM->dbgf.s.SteppingFilter.idCpu = NIL_VMCPUID;
1845	else
1846	pVM->dbgf.s.SteppingFilter.idCpu = idCpu;
1847	pVM->dbgf.s.SteppingFilter.fFlags = fFlags;
1848	if (fFlags & DBGF_STEP_F_STOP_ON_ADDRESS)
1849	pVM->dbgf.s.SteppingFilter.AddrPc = pStopPcAddr->FlatPtr;
1850	else
1851	pVM->dbgf.s.SteppingFilter.AddrPc = 0;
1852	if (fFlags & DBGF_STEP_F_STOP_ON_STACK_POP)
1853	{
1854	pVM->dbgf.s.SteppingFilter.AddrStackPop = pStopPopAddr->FlatPtr;
1855	pVM->dbgf.s.SteppingFilter.cbStackPop = cbStopPop;
1856	}
1857	else
1858	{
1859	pVM->dbgf.s.SteppingFilter.AddrStackPop = 0;
1860	pVM->dbgf.s.SteppingFilter.cbStackPop = RTGCPTR_MAX;
1861	}
1862
1863	pVM->dbgf.s.SteppingFilter.cMaxSteps = cMaxSteps;
1864	pVM->dbgf.s.SteppingFilter.cSteps = 0;
1865	pVM->dbgf.s.SteppingFilter.uCallDepth = 0;
1866
1867	Assert(dbgfR3CpuIsHalted(pUVCpu));
1868	return dbgfR3CpuSetCmdAndNotify(pUVCpu, DBGFCMD_SINGLE_STEP);
1869	}
1870
1871
1872
1873	/**
1874	* dbgfR3EventConfigEx argument packet.
1875	*/
1876	typedef struct DBGFR3EVENTCONFIGEXARGS
1877	{
1878	PCDBGFEVENTCONFIG paConfigs;
1879	size_t cConfigs;
1880	int rc;
1881	} DBGFR3EVENTCONFIGEXARGS;
1882	/** Pointer to a dbgfR3EventConfigEx argument packet. */
1883	typedef DBGFR3EVENTCONFIGEXARGS *PDBGFR3EVENTCONFIGEXARGS;
1884
1885
1886	/**
1887	* @callback_method_impl{FNVMMEMTRENDEZVOUS, Worker for DBGFR3EventConfigEx.}
1888	*/
1889	static DECLCALLBACK(VBOXSTRICTRC) dbgfR3EventConfigEx(PVM pVM, PVMCPU pVCpu, void *pvUser)
1890	{
1891	if (pVCpu->idCpu == 0)
1892	{
1893	PDBGFR3EVENTCONFIGEXARGS pArgs = (PDBGFR3EVENTCONFIGEXARGS)pvUser;
1894	DBGFEVENTCONFIG volatile const *paConfigs = pArgs->paConfigs;
1895	size_t cConfigs = pArgs->cConfigs;
1896
1897	/*
1898	* Apply the changes.
1899	*/
1900	unsigned cChanges = 0;
1901	for (uint32_t i = 0; i < cConfigs; i++)
1902	{
1903	DBGFEVENTTYPE enmType = paConfigs[i].enmType;
1904	AssertReturn(enmType >= DBGFEVENT_FIRST_SELECTABLE && enmType < DBGFEVENT_END, VERR_INVALID_PARAMETER);
1905	if (paConfigs[i].fEnabled)
1906	cChanges += ASMAtomicBitTestAndSet(&pVM->dbgf.s.bmSelectedEvents, enmType) == false;
1907	else
1908	cChanges += ASMAtomicBitTestAndClear(&pVM->dbgf.s.bmSelectedEvents, enmType) == true;
1909	}
1910
1911	/*
1912	* Inform HM about changes.
1913	*/
1914	if (cChanges > 0 && HMIsEnabled(pVM))
1915	{
1916	HMR3NotifyDebugEventChanged(pVM);
1917	HMR3NotifyDebugEventChangedPerCpu(pVM, pVCpu);
1918	}
1919	}
1920	else if (HMIsEnabled(pVM))
1921	HMR3NotifyDebugEventChangedPerCpu(pVM, pVCpu);
1922
1923	return VINF_SUCCESS;
1924	}
1925
1926
1927	/**
1928	* Configures (enables/disables) multiple selectable debug events.
1929	*
1930	* @returns VBox status code.
1931	* @param pUVM The user mode VM handle.
1932	* @param paConfigs The event to configure and their new state.
1933	* @param cConfigs Number of entries in @a paConfigs.
1934	*/
1935	VMMR3DECL(int) DBGFR3EventConfigEx(PUVM pUVM, PCDBGFEVENTCONFIG paConfigs, size_t cConfigs)
1936	{
1937	/*
1938	* Validate input.
1939	*/
1940	size_t i = cConfigs;
1941	while (i-- > 0)
1942	{
1943	AssertReturn(paConfigs[i].enmType >= DBGFEVENT_FIRST_SELECTABLE, VERR_INVALID_PARAMETER);
1944	AssertReturn(paConfigs[i].enmType < DBGFEVENT_END, VERR_INVALID_PARAMETER);
1945	}
1946	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1947	PVM pVM = pUVM->pVM;
1948	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1949
1950	/*
1951	* Apply the changes in EMT(0) and rendezvous with the other CPUs so they
1952	* can sync their data and execution with new debug state.
1953	*/
1954	DBGFR3EVENTCONFIGEXARGS Args = { paConfigs, cConfigs, VINF_SUCCESS };
1955	int rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ASCENDING \| VMMEMTRENDEZVOUS_FLAGS_PRIORITY,
1956	dbgfR3EventConfigEx, &Args);
1957	if (RT_SUCCESS(rc))
1958	rc = Args.rc;
1959	return rc;
1960	}
1961
1962
1963	/**
1964	* Enables or disables a selectable debug event.
1965	*
1966	* @returns VBox status code.
1967	* @param pUVM The user mode VM handle.
1968	* @param enmEvent The selectable debug event.
1969	* @param fEnabled The new state.
1970	*/
1971	VMMR3DECL(int) DBGFR3EventConfig(PUVM pUVM, DBGFEVENTTYPE enmEvent, bool fEnabled)
1972	{
1973	/*
1974	* Convert to an array call.
1975	*/
1976	DBGFEVENTCONFIG EvtCfg = { enmEvent, fEnabled };
1977	return DBGFR3EventConfigEx(pUVM, &EvtCfg, 1);
1978	}
1979
1980
1981	/**
1982	* Checks if the given selectable event is enabled.
1983	*
1984	* @returns true if enabled, false if not or invalid input.
1985	* @param pUVM The user mode VM handle.
1986	* @param enmEvent The selectable debug event.
1987	* @sa DBGFR3EventQuery
1988	*/
1989	VMMR3DECL(bool) DBGFR3EventIsEnabled(PUVM pUVM, DBGFEVENTTYPE enmEvent)
1990	{
1991	/*
1992	* Validate input.
1993	*/
1994	AssertReturn( enmEvent >= DBGFEVENT_HALT_DONE
1995	&& enmEvent < DBGFEVENT_END, false);
1996	Assert( enmEvent >= DBGFEVENT_FIRST_SELECTABLE
1997	\|\| enmEvent == DBGFEVENT_BREAKPOINT
1998	\|\| enmEvent == DBGFEVENT_BREAKPOINT_IO
1999	\|\| enmEvent == DBGFEVENT_BREAKPOINT_MMIO);
2000
2001	UVM_ASSERT_VALID_EXT_RETURN(pUVM, false);
2002	PVM pVM = pUVM->pVM;
2003	VM_ASSERT_VALID_EXT_RETURN(pVM, false);
2004
2005	/*
2006	* Check the event status.
2007	*/
2008	return ASMBitTest(&pVM->dbgf.s.bmSelectedEvents, enmEvent);
2009	}
2010
2011
2012	/**
2013	* Queries the status of a set of events.
2014	*
2015	* @returns VBox status code.
2016	* @param pUVM The user mode VM handle.
2017	* @param paConfigs The events to query and where to return the state.
2018	* @param cConfigs The number of elements in @a paConfigs.
2019	* @sa DBGFR3EventIsEnabled, DBGF_IS_EVENT_ENABLED
2020	*/
2021	VMMR3DECL(int) DBGFR3EventQuery(PUVM pUVM, PDBGFEVENTCONFIG paConfigs, size_t cConfigs)
2022	{
2023	/*
2024	* Validate input.
2025	*/
2026	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
2027	PVM pVM = pUVM->pVM;
2028	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
2029
2030	for (size_t i = 0; i < cConfigs; i++)
2031	{
2032	DBGFEVENTTYPE enmType = paConfigs[i].enmType;
2033	AssertReturn( enmType >= DBGFEVENT_HALT_DONE
2034	&& enmType < DBGFEVENT_END, VERR_INVALID_PARAMETER);
2035	Assert( enmType >= DBGFEVENT_FIRST_SELECTABLE
2036	\|\| enmType == DBGFEVENT_BREAKPOINT
2037	\|\| enmType == DBGFEVENT_BREAKPOINT_IO
2038	\|\| enmType == DBGFEVENT_BREAKPOINT_MMIO);
2039	paConfigs[i].fEnabled = ASMBitTest(&pVM->dbgf.s.bmSelectedEvents, paConfigs[i].enmType);
2040	}
2041
2042	return VINF_SUCCESS;
2043	}
2044
2045
2046	/**
2047	* dbgfR3InterruptConfigEx argument packet.
2048	*/
2049	typedef struct DBGFR3INTERRUPTCONFIGEXARGS
2050	{
2051	PCDBGFINTERRUPTCONFIG paConfigs;
2052	size_t cConfigs;
2053	int rc;
2054	} DBGFR3INTERRUPTCONFIGEXARGS;
2055	/** Pointer to a dbgfR3InterruptConfigEx argument packet. */
2056	typedef DBGFR3INTERRUPTCONFIGEXARGS *PDBGFR3INTERRUPTCONFIGEXARGS;
2057
2058	/**
2059	* @callback_method_impl{FNVMMEMTRENDEZVOUS,
2060	* Worker for DBGFR3InterruptConfigEx.}
2061	*/
2062	static DECLCALLBACK(VBOXSTRICTRC) dbgfR3InterruptConfigEx(PVM pVM, PVMCPU pVCpu, void *pvUser)
2063	{
2064	if (pVCpu->idCpu == 0)
2065	{
2066	PDBGFR3INTERRUPTCONFIGEXARGS pArgs = (PDBGFR3INTERRUPTCONFIGEXARGS)pvUser;
2067	PCDBGFINTERRUPTCONFIG paConfigs = pArgs->paConfigs;
2068	size_t cConfigs = pArgs->cConfigs;
2069
2070	/*
2071	* Apply the changes.
2072	*/
2073	bool fChanged = false;
2074	bool fThis;
2075	for (uint32_t i = 0; i < cConfigs; i++)
2076	{
2077	/*
2078	* Hardware interrupts.
2079	*/
2080	if (paConfigs[i].enmHardState == DBGFINTERRUPTSTATE_ENABLED)
2081	{
2082	fChanged \|= fThis = ASMAtomicBitTestAndSet(&pVM->dbgf.s.bmHardIntBreakpoints, paConfigs[i].iInterrupt) == false;
2083	if (fThis)
2084	{
2085	Assert(pVM->dbgf.s.cHardIntBreakpoints < 256);
2086	pVM->dbgf.s.cHardIntBreakpoints++;
2087	}
2088	}
2089	else if (paConfigs[i].enmHardState == DBGFINTERRUPTSTATE_DISABLED)
2090	{
2091	fChanged \|= fThis = ASMAtomicBitTestAndClear(&pVM->dbgf.s.bmHardIntBreakpoints, paConfigs[i].iInterrupt) == true;
2092	if (fThis)
2093	{
2094	Assert(pVM->dbgf.s.cHardIntBreakpoints > 0);
2095	pVM->dbgf.s.cHardIntBreakpoints--;
2096	}
2097	}
2098
2099	/*
2100	* Software interrupts.
2101	*/
2102	if (paConfigs[i].enmHardState == DBGFINTERRUPTSTATE_ENABLED)
2103	{
2104	fChanged \|= fThis = ASMAtomicBitTestAndSet(&pVM->dbgf.s.bmSoftIntBreakpoints, paConfigs[i].iInterrupt) == false;
2105	if (fThis)
2106	{
2107	Assert(pVM->dbgf.s.cSoftIntBreakpoints < 256);
2108	pVM->dbgf.s.cSoftIntBreakpoints++;
2109	}
2110	}
2111	else if (paConfigs[i].enmSoftState == DBGFINTERRUPTSTATE_DISABLED)
2112	{
2113	fChanged \|= fThis = ASMAtomicBitTestAndClear(&pVM->dbgf.s.bmSoftIntBreakpoints, paConfigs[i].iInterrupt) == true;
2114	if (fThis)
2115	{
2116	Assert(pVM->dbgf.s.cSoftIntBreakpoints > 0);
2117	pVM->dbgf.s.cSoftIntBreakpoints--;
2118	}
2119	}
2120	}
2121
2122	/*
2123	* Update the event bitmap entries.
2124	*/
2125	if (pVM->dbgf.s.cHardIntBreakpoints > 0)
2126	fChanged \|= ASMAtomicBitTestAndSet(&pVM->dbgf.s.bmSelectedEvents, DBGFEVENT_INTERRUPT_HARDWARE) == false;
2127	else
2128	fChanged \|= ASMAtomicBitTestAndClear(&pVM->dbgf.s.bmSelectedEvents, DBGFEVENT_INTERRUPT_HARDWARE) == true;
2129
2130	if (pVM->dbgf.s.cSoftIntBreakpoints > 0)
2131	fChanged \|= ASMAtomicBitTestAndSet(&pVM->dbgf.s.bmSelectedEvents, DBGFEVENT_INTERRUPT_SOFTWARE) == false;
2132	else
2133	fChanged \|= ASMAtomicBitTestAndClear(&pVM->dbgf.s.bmSelectedEvents, DBGFEVENT_INTERRUPT_SOFTWARE) == true;
2134
2135	/*
2136	* Inform HM about changes.
2137	*/
2138	if (fChanged && HMIsEnabled(pVM))
2139	{
2140	HMR3NotifyDebugEventChanged(pVM);
2141	HMR3NotifyDebugEventChangedPerCpu(pVM, pVCpu);
2142	}
2143	}
2144	else if (HMIsEnabled(pVM))
2145	HMR3NotifyDebugEventChangedPerCpu(pVM, pVCpu);
2146
2147	return VINF_SUCCESS;
2148	}
2149
2150
2151	/**
2152	* Changes
2153	*
2154	* @returns VBox status code.
2155	* @param pUVM The user mode VM handle.
2156	* @param paConfigs The events to query and where to return the state.
2157	* @param cConfigs The number of elements in @a paConfigs.
2158	* @sa DBGFR3InterruptConfigHardware, DBGFR3InterruptConfigSoftware
2159	*/
2160	VMMR3DECL(int) DBGFR3InterruptConfigEx(PUVM pUVM, PCDBGFINTERRUPTCONFIG paConfigs, size_t cConfigs)
2161	{
2162	/*
2163	* Validate input.
2164	*/
2165	size_t i = cConfigs;
2166	while (i-- > 0)
2167	{
2168	AssertReturn(paConfigs[i].enmHardState <= DBGFINTERRUPTSTATE_DONT_TOUCH, VERR_INVALID_PARAMETER);
2169	AssertReturn(paConfigs[i].enmSoftState <= DBGFINTERRUPTSTATE_DONT_TOUCH, VERR_INVALID_PARAMETER);
2170	}
2171
2172	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
2173	PVM pVM = pUVM->pVM;
2174	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
2175
2176	/*
2177	* Apply the changes in EMT(0) and rendezvous with the other CPUs so they
2178	* can sync their data and execution with new debug state.
2179	*/
2180	DBGFR3INTERRUPTCONFIGEXARGS Args = { paConfigs, cConfigs, VINF_SUCCESS };
2181	int rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ASCENDING \| VMMEMTRENDEZVOUS_FLAGS_PRIORITY,
2182	dbgfR3InterruptConfigEx, &Args);
2183	if (RT_SUCCESS(rc))
2184	rc = Args.rc;
2185	return rc;
2186	}
2187
2188
2189	/**
2190	* Configures interception of a hardware interrupt.
2191	*
2192	* @returns VBox status code.
2193	* @param pUVM The user mode VM handle.
2194	* @param iInterrupt The interrupt number.
2195	* @param fEnabled Whether interception is enabled or not.
2196	* @sa DBGFR3InterruptSoftwareConfig, DBGFR3InterruptConfigEx
2197	*/
2198	VMMR3DECL(int) DBGFR3InterruptHardwareConfig(PUVM pUVM, uint8_t iInterrupt, bool fEnabled)
2199	{
2200	/*
2201	* Convert to DBGFR3InterruptConfigEx call.
2202	*/
2203	DBGFINTERRUPTCONFIG IntCfg = { iInterrupt, (uint8_t)fEnabled, DBGFINTERRUPTSTATE_DONT_TOUCH };
2204	return DBGFR3InterruptConfigEx(pUVM, &IntCfg, 1);
2205	}
2206
2207
2208	/**
2209	* Configures interception of a software interrupt.
2210	*
2211	* @returns VBox status code.
2212	* @param pUVM The user mode VM handle.
2213	* @param iInterrupt The interrupt number.
2214	* @param fEnabled Whether interception is enabled or not.
2215	* @sa DBGFR3InterruptHardwareConfig, DBGFR3InterruptConfigEx
2216	*/
2217	VMMR3DECL(int) DBGFR3InterruptSoftwareConfig(PUVM pUVM, uint8_t iInterrupt, bool fEnabled)
2218	{
2219	/*
2220	* Convert to DBGFR3InterruptConfigEx call.
2221	*/
2222	DBGFINTERRUPTCONFIG IntCfg = { iInterrupt, DBGFINTERRUPTSTATE_DONT_TOUCH, (uint8_t)fEnabled };
2223	return DBGFR3InterruptConfigEx(pUVM, &IntCfg, 1);
2224	}
2225
2226
2227	/**
2228	* Checks whether interception is enabled for a hardware interrupt.
2229	*
2230	* @returns true if enabled, false if not or invalid input.
2231	* @param pUVM The user mode VM handle.
2232	* @param iInterrupt The interrupt number.
2233	* @sa DBGFR3InterruptSoftwareIsEnabled, DBGF_IS_HARDWARE_INT_ENABLED,
2234	* DBGF_IS_SOFTWARE_INT_ENABLED
2235	*/
2236	VMMR3DECL(int) DBGFR3InterruptHardwareIsEnabled(PUVM pUVM, uint8_t iInterrupt)
2237	{
2238	/*
2239	* Validate input.
2240	*/
2241	UVM_ASSERT_VALID_EXT_RETURN(pUVM, false);
2242	PVM pVM = pUVM->pVM;
2243	VM_ASSERT_VALID_EXT_RETURN(pVM, false);
2244
2245	/*
2246	* Check it.
2247	*/
2248	return ASMBitTest(&pVM->dbgf.s.bmHardIntBreakpoints, iInterrupt);
2249	}
2250
2251
2252	/**
2253	* Checks whether interception is enabled for a software interrupt.
2254	*
2255	* @returns true if enabled, false if not or invalid input.
2256	* @param pUVM The user mode VM handle.
2257	* @param iInterrupt The interrupt number.
2258	* @sa DBGFR3InterruptHardwareIsEnabled, DBGF_IS_SOFTWARE_INT_ENABLED,
2259	* DBGF_IS_HARDWARE_INT_ENABLED,
2260	*/
2261	VMMR3DECL(int) DBGFR3InterruptSoftwareIsEnabled(PUVM pUVM, uint8_t iInterrupt)
2262	{
2263	/*
2264	* Validate input.
2265	*/
2266	UVM_ASSERT_VALID_EXT_RETURN(pUVM, false);
2267	PVM pVM = pUVM->pVM;
2268	VM_ASSERT_VALID_EXT_RETURN(pVM, false);
2269
2270	/*
2271	* Check it.
2272	*/
2273	return ASMBitTest(&pVM->dbgf.s.bmSoftIntBreakpoints, iInterrupt);
2274	}
2275
2276
2277
2278	/**
2279	* Call this to single step programmatically.
2280	*
2281	* You must pass down the return code to the EM loop! That's
2282	* where the actual single stepping take place (at least in the
2283	* current implementation).
2284	*
2285	* @returns VINF_EM_DBG_STEP
2286	*
2287	* @param pVCpu The cross context virtual CPU structure.
2288	*
2289	* @thread VCpu EMT
2290	* @internal
2291	*/
2292	VMMR3_INT_DECL(int) DBGFR3PrgStep(PVMCPU pVCpu)
2293	{
2294	VMCPU_ASSERT_EMT(pVCpu);
2295
2296	pVCpu->dbgf.s.fSingleSteppingRaw = true;
2297	return VINF_EM_DBG_STEP;
2298	}
2299
2300
2301	/**
2302	* Inject an NMI into a running VM (only VCPU 0!)
2303	*
2304	* @returns VBox status code.
2305	* @param pUVM The user mode VM structure.
2306	* @param idCpu The ID of the CPU to inject the NMI on.
2307	*/
2308	VMMR3DECL(int) DBGFR3InjectNMI(PUVM pUVM, VMCPUID idCpu)
2309	{
2310	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
2311	PVM pVM = pUVM->pVM;
2312	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
2313	AssertReturn(idCpu < pVM->cCpus, VERR_INVALID_CPU_ID);
2314
2315	/** @todo Implement generic NMI injection. */
2316	/** @todo NEM: NMI injection */
2317	if (!HMIsEnabled(pVM))
2318	return VERR_NOT_SUP_BY_NEM;
2319
2320	VMCPU_FF_SET(pVM->apCpusR3[idCpu], VMCPU_FF_INTERRUPT_NMI);
2321	return VINF_SUCCESS;
2322	}
2323

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source: vbox/trunk/src/VBox/VMM/VMMR3/DBGF.cpp@ 92780

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