DBGF.cpp@ 61744

Last change on this file since 61744 was 61628, checked in by vboxsync, 9 years ago
DBGF: Added bsod_msr event, stubbed bsod_efi event. Since we cannot return VINF_EM_DBG_EVENT from an MSR handler, VMCPU_FF_DBGF was introduced as an alternative.
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1	/* $Id: DBGF.cpp 61628 2016-06-09 17:52:51Z vboxsync $ */
2	/** @file
3	* DBGF - Debugger Facility.
4	*/
5
6	/*
7	* Copyright (C) 2006-2015 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18
19	/** @page pg_dbgf DBGF - The Debugger Facility
20	*
21	* The purpose of the DBGF is to provide an interface for debuggers to
22	* manipulate the VMM without having to mess up the source code for each of
23	* them. The DBGF is always built in and will always work when a debugger
24	* attaches to the VM. The DBGF provides the basic debugger features, such as
25	* halting execution, handling breakpoints, single step execution, instruction
26	* disassembly, info querying, OS specific diggers, symbol and module
27	* management.
28	*
29	* The interface is working in a manner similar to the win32, linux and os2
30	* debugger interfaces. The interface has an asynchronous nature. This comes
31	* from the fact that the VMM and the Debugger are running in different threads.
32	* They are referred to as the "emulation thread" and the "debugger thread", or
33	* as the "ping thread" and the "pong thread, respectivly. (The last set of
34	* names comes from the use of the Ping-Pong synchronization construct from the
35	* RTSem API.)
36	*
37	* @see grp_dbgf
38	*
39	*
40	* @section sec_dbgf_scenario Usage Scenario
41	*
42	* The debugger starts by attaching to the VM. For practical reasons we limit the
43	* number of concurrently attached debuggers to 1 per VM. The action of
44	* attaching to the VM causes the VM to check and generate debug events.
45	*
46	* The debugger then will wait/poll for debug events and issue commands.
47	*
48	* The waiting and polling is done by the DBGFEventWait() function. It will wait
49	* for the emulation thread to send a ping, thus indicating that there is an
50	* event waiting to be processed.
51	*
52	* An event can be a response to a command issued previously, the hitting of a
53	* breakpoint, or running into a bad/fatal VMM condition. The debugger now has
54	* the ping and must respond to the event at hand - the VMM is waiting. This
55	* usually means that the user of the debugger must do something, but it doesn't
56	* have to. The debugger is free to call any DBGF function (nearly at least)
57	* while processing the event.
58	*
59	* Typically the user will issue a request for the execution to be resumed, so
60	* the debugger calls DBGFResume() and goes back to waiting/polling for events.
61	*
62	* When the user eventually terminates the debugging session or selects another
63	* VM, the debugger detaches from the VM. This means that breakpoints are
64	* disabled and that the emulation thread no longer polls for debugger commands.
65	*
66	*/
67
68
69	/*********************************************************************************************************************************
70	* Header Files *
71	*********************************************************************************************************************************/
72	#define LOG_GROUP LOG_GROUP_DBGF
73	#include <VBox/vmm/dbgf.h>
74	#include <VBox/vmm/selm.h>
75	#ifdef VBOX_WITH_REM
76	# include <VBox/vmm/rem.h>
77	#endif
78	#include <VBox/vmm/em.h>
79	#include <VBox/vmm/hm.h>
80	#include "DBGFInternal.h"
81	#include <VBox/vmm/vm.h>
82	#include <VBox/vmm/uvm.h>
83	#include <VBox/err.h>
84
85	#include <VBox/log.h>
86	#include <iprt/semaphore.h>
87	#include <iprt/thread.h>
88	#include <iprt/asm.h>
89	#include <iprt/time.h>
90	#include <iprt/assert.h>
91	#include <iprt/stream.h>
92	#include <iprt/env.h>
93
94
95	/*********************************************************************************************************************************
96	* Internal Functions *
97	*********************************************************************************************************************************/
98	static int dbgfR3VMMWait(PVM pVM);
99	static int dbgfR3VMMCmd(PVM pVM, DBGFCMD enmCmd, PDBGFCMDDATA pCmdData, bool *pfResumeExecution);
100	static DECLCALLBACK(int) dbgfR3Attach(PVM pVM);
101
102
103	/**
104	* Sets the VMM Debug Command variable.
105	*
106	* @returns Previous command.
107	* @param pVM The cross context VM structure.
108	* @param enmCmd The command.
109	*/
110	DECLINLINE(DBGFCMD) dbgfR3SetCmd(PVM pVM, DBGFCMD enmCmd)
111	{
112	DBGFCMD rc;
113	if (enmCmd == DBGFCMD_NO_COMMAND)
114	{
115	Log2(("DBGF: Setting command to %d (DBGFCMD_NO_COMMAND)\n", enmCmd));
116	rc = (DBGFCMD)ASMAtomicXchgU32((uint32_t volatile )(void )&pVM->dbgf.s.enmVMMCmd, enmCmd);
117	VM_FF_CLEAR(pVM, VM_FF_DBGF);
118	}
119	else
120	{
121	Log2(("DBGF: Setting command to %d\n", enmCmd));
122	AssertMsg(pVM->dbgf.s.enmVMMCmd == DBGFCMD_NO_COMMAND, ("enmCmd=%d enmVMMCmd=%d\n", enmCmd, pVM->dbgf.s.enmVMMCmd));
123	rc = (DBGFCMD)ASMAtomicXchgU32((uint32_t volatile )(void )&pVM->dbgf.s.enmVMMCmd, enmCmd);
124	VM_FF_SET(pVM, VM_FF_DBGF);
125	VMR3NotifyGlobalFFU(pVM->pUVM, 0 /* didn't notify REM */);
126	}
127	return rc;
128	}
129
130
131	/**
132	* Initializes the DBGF.
133	*
134	* @returns VBox status code.
135	* @param pVM The cross context VM structure.
136	*/
137	VMMR3_INT_DECL(int) DBGFR3Init(PVM pVM)
138	{
139	PUVM pUVM = pVM->pUVM;
140	AssertCompile(sizeof(pUVM->dbgf.s) <= sizeof(pUVM->dbgf.padding));
141	AssertCompile(sizeof(pUVM->aCpus[0].dbgf.s) <= sizeof(pUVM->aCpus[0].dbgf.padding));
142
143	/*
144	* The usual sideways mountain climbing style of init:
145	*/
146	int rc = dbgfR3InfoInit(pUVM); /* (First, initalizes the shared critical section.) */
147	if (RT_SUCCESS(rc))
148	{
149	rc = dbgfR3TraceInit(pVM);
150	if (RT_SUCCESS(rc))
151	{
152	rc = dbgfR3RegInit(pUVM);
153	if (RT_SUCCESS(rc))
154	{
155	rc = dbgfR3AsInit(pUVM);
156	if (RT_SUCCESS(rc))
157	{
158	rc = dbgfR3BpInit(pVM);
159	if (RT_SUCCESS(rc))
160	{
161	rc = dbgfR3OSInit(pUVM);
162	if (RT_SUCCESS(rc))
163	{
164	rc = dbgfR3PlugInInit(pUVM);
165	if (RT_SUCCESS(rc))
166	{
167	return VINF_SUCCESS;
168	}
169	dbgfR3OSTerm(pUVM);
170	}
171	}
172	dbgfR3AsTerm(pUVM);
173	}
174	dbgfR3RegTerm(pUVM);
175	}
176	dbgfR3TraceTerm(pVM);
177	}
178	dbgfR3InfoTerm(pUVM);
179	}
180	return rc;
181	}
182
183
184	/**
185	* Terminates and cleans up resources allocated by the DBGF.
186	*
187	* @returns VBox status code.
188	* @param pVM The cross context VM structure.
189	*/
190	VMMR3_INT_DECL(int) DBGFR3Term(PVM pVM)
191	{
192	PUVM pUVM = pVM->pUVM;
193
194	dbgfR3PlugInTerm(pUVM);
195	dbgfR3OSTerm(pUVM);
196	dbgfR3AsTerm(pUVM);
197	dbgfR3RegTerm(pUVM);
198	dbgfR3TraceTerm(pVM);
199	dbgfR3InfoTerm(pUVM);
200
201	return VINF_SUCCESS;
202	}
203
204
205	/**
206	* Called when the VM is powered off to detach debuggers.
207	*
208	* @param pVM The cross context VM structure.
209	*/
210	VMMR3_INT_DECL(void) DBGFR3PowerOff(PVM pVM)
211	{
212
213	/*
214	* Send a termination event to any attached debugger.
215	*/
216	/* wait to become the speaker (we should already be that). */
217	if ( pVM->dbgf.s.fAttached
218	&& RTSemPingShouldWait(&pVM->dbgf.s.PingPong))
219	RTSemPingWait(&pVM->dbgf.s.PingPong, 5000);
220
221	if (pVM->dbgf.s.fAttached)
222	{
223	/* Just mark it as detached if we're not in a position to send a power
224	off event. It should fail later on. */
225	if (!RTSemPingIsSpeaker(&pVM->dbgf.s.PingPong))
226	{
227	ASMAtomicWriteBool(&pVM->dbgf.s.fAttached, false);
228	if (RTSemPingIsSpeaker(&pVM->dbgf.s.PingPong))
229	ASMAtomicWriteBool(&pVM->dbgf.s.fAttached, true);
230	}
231
232	if (RTSemPingIsSpeaker(&pVM->dbgf.s.PingPong))
233	{
234	/* Try send the power off event. */
235	int rc;
236	DBGFCMD enmCmd = dbgfR3SetCmd(pVM, DBGFCMD_NO_COMMAND);
237	if (enmCmd == DBGFCMD_DETACH_DEBUGGER)
238	/* the debugger beat us to initiating the detaching. */
239	rc = VINF_SUCCESS;
240	else
241	{
242	/* ignore the command (if any). */
243	enmCmd = DBGFCMD_NO_COMMAND;
244	pVM->dbgf.s.DbgEvent.enmType = DBGFEVENT_POWERING_OFF;
245	pVM->dbgf.s.DbgEvent.enmCtx = DBGFEVENTCTX_OTHER;
246	rc = RTSemPing(&pVM->dbgf.s.PingPong);
247	}
248
249	/*
250	* Process commands and priority requests until we get a command
251	* indicating that the debugger has detached.
252	*/
253	uint32_t cPollHack = 1;
254	PVMCPU pVCpu = VMMGetCpu(pVM);
255	while (RT_SUCCESS(rc))
256	{
257	if (enmCmd != DBGFCMD_NO_COMMAND)
258	{
259	/* process command */
260	bool fResumeExecution;
261	DBGFCMDDATA CmdData = pVM->dbgf.s.VMMCmdData;
262	rc = dbgfR3VMMCmd(pVM, enmCmd, &CmdData, &fResumeExecution);
263	if (enmCmd == DBGFCMD_DETACHED_DEBUGGER)
264	break;
265	enmCmd = DBGFCMD_NO_COMMAND;
266	}
267	else
268	{
269	/* Wait for new command, processing pending priority requests
270	first. The request processing is a bit crazy, but
271	unfortunately required by plugin unloading. */
272	if ( VM_FF_IS_PENDING(pVM, VM_FF_REQUEST)
273	\|\| VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_REQUEST))
274	{
275	LogFlow(("DBGFR3PowerOff: Processes priority requests...\n"));
276	rc = VMR3ReqProcessU(pVM->pUVM, VMCPUID_ANY, true /fPriorityOnly/);
277	if (rc == VINF_SUCCESS)
278	rc = VMR3ReqProcessU(pVM->pUVM, pVCpu->idCpu, true /fPriorityOnly/);
279	LogFlow(("DBGFR3PowerOff: VMR3ReqProcess -> %Rrc\n", rc));
280	cPollHack = 1;
281	}
282	/* Need to handle rendezvous too, for generic debug event management. */
283	else if (VM_FF_IS_PENDING(pVM, VM_FF_EMT_RENDEZVOUS))
284	{
285	rc = VMMR3EmtRendezvousFF(pVM, pVCpu);
286	AssertLogRel(rc == VINF_SUCCESS);
287	cPollHack = 1;
288	}
289	else if (cPollHack < 120)
290	cPollHack++;
291
292	rc = RTSemPingWait(&pVM->dbgf.s.PingPong, cPollHack);
293	if (RT_SUCCESS(rc))
294	enmCmd = dbgfR3SetCmd(pVM, DBGFCMD_NO_COMMAND);
295	else if (rc == VERR_TIMEOUT)
296	rc = VINF_SUCCESS;
297	}
298	}
299
300	/*
301	* Clear the FF so we won't get confused later on.
302	*/
303	VM_FF_CLEAR(pVM, VM_FF_DBGF);
304	}
305	}
306	}
307
308
309	/**
310	* Applies relocations to data and code managed by this
311	* component. This function will be called at init and
312	* whenever the VMM need to relocate it self inside the GC.
313	*
314	* @param pVM The cross context VM structure.
315	* @param offDelta Relocation delta relative to old location.
316	*/
317	VMMR3_INT_DECL(void) DBGFR3Relocate(PVM pVM, RTGCINTPTR offDelta)
318	{
319	dbgfR3TraceRelocate(pVM);
320	dbgfR3AsRelocate(pVM->pUVM, offDelta);
321	}
322
323
324	/**
325	* Waits a little while for a debuggger to attach.
326	*
327	* @returns True is a debugger have attached.
328	* @param pVM The cross context VM structure.
329	* @param pVCpu The cross context per CPU structure.
330	* @param enmEvent Event.
331	*
332	* @thread EMT(pVCpu)
333	*/
334	bool dbgfR3WaitForAttach(PVM pVM, PVMCPU pVCpu, DBGFEVENTTYPE enmEvent)
335	{
336	/*
337	* First a message.
338	*/
339	#ifndef RT_OS_L4
340
341	# if !defined(DEBUG) \|\| defined(DEBUG_sandervl) \|\| defined(DEBUG_frank) \|\| defined(IEM_VERIFICATION_MODE)
342	int cWait = 10;
343	# else
344	int cWait = HMIsEnabled(pVM)
345	&& ( enmEvent == DBGFEVENT_ASSERTION_HYPER
346	\|\| enmEvent == DBGFEVENT_FATAL_ERROR)
347	&& !RTEnvExist("VBOX_DBGF_WAIT_FOR_ATTACH")
348	? 10
349	: 150;
350	# endif
351	RTStrmPrintf(g_pStdErr, "DBGF: No debugger attached, waiting %d second%s for one to attach (event=%d)\n",
352	cWait / 10, cWait != 10 ? "s" : "", enmEvent);
353	RTStrmFlush(g_pStdErr);
354	while (cWait > 0)
355	{
356	RTThreadSleep(100);
357	if (pVM->dbgf.s.fAttached)
358	{
359	RTStrmPrintf(g_pStdErr, "Attached!\n");
360	RTStrmFlush(g_pStdErr);
361	return true;
362	}
363
364	/* Process priority stuff. */
365	if ( VM_FF_IS_PENDING(pVM, VM_FF_REQUEST)
366	\|\| VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_REQUEST))
367	{
368	int rc = VMR3ReqProcessU(pVM->pUVM, VMCPUID_ANY, true /fPriorityOnly/);
369	if (rc == VINF_SUCCESS)
370	rc = VMR3ReqProcessU(pVM->pUVM, pVCpu->idCpu, true /fPriorityOnly/);
371	if (rc != VINF_SUCCESS)
372	{
373	RTStrmPrintf(g_pStdErr, "[rcReq=%Rrc, ignored!]", rc);
374	RTStrmFlush(g_pStdErr);
375	}
376	}
377
378	/* next */
379	if (!(cWait % 10))
380	{
381	RTStrmPrintf(g_pStdErr, "%d.", cWait / 10);
382	RTStrmFlush(g_pStdErr);
383	}
384	cWait--;
385	}
386	#endif
387
388	RTStrmPrintf(g_pStdErr, "Stopping the VM!\n");
389	RTStrmFlush(g_pStdErr);
390	return false;
391	}
392
393
394	/**
395	* Forced action callback.
396	*
397	* The VMM will call this from it's main loop when either VM_FF_DBGF or
398	* VMCPU_FF_DBGF are set.
399	*
400	* The function checks for and executes pending commands from the debugger.
401	* Then it checks for pending debug events and serves these.
402	*
403	* @returns VINF_SUCCESS normally.
404	* @returns VERR_DBGF_RAISE_FATAL_ERROR to pretend a fatal error happened.
405	* @param pVM The cross context VM structure.
406	*/
407	VMMR3_INT_DECL(int) DBGFR3VMMForcedAction(PVM pVM, PVMCPU pVCpu)
408	{
409	VBOXSTRICTRC rcStrict = VINF_SUCCESS;
410
411	if (VM_FF_TEST_AND_CLEAR(pVM, VM_FF_DBGF))
412	{
413	/*
414	* Command pending? Process it.
415	*/
416	if (pVM->dbgf.s.enmVMMCmd != DBGFCMD_NO_COMMAND)
417	{
418	bool fResumeExecution;
419	DBGFCMDDATA CmdData = pVM->dbgf.s.VMMCmdData;
420	DBGFCMD enmCmd = dbgfR3SetCmd(pVM, DBGFCMD_NO_COMMAND);
421	rcStrict = dbgfR3VMMCmd(pVM, enmCmd, &CmdData, &fResumeExecution);
422	if (!fResumeExecution)
423	rcStrict = dbgfR3VMMWait(pVM);
424	}
425	}
426
427	/*
428	* Dispatch pending events.
429	*/
430	if (VMCPU_FF_TEST_AND_CLEAR(pVCpu, VMCPU_FF_DBGF))
431	{
432	if ( pVCpu->dbgf.s.cEvents > 0
433	&& pVCpu->dbgf.s.aEvents[pVCpu->dbgf.s.cEvents - 1].enmState == DBGFEVENTSTATE_CURRENT)
434	{
435	VBOXSTRICTRC rcStrict2 = DBGFR3EventHandlePending(pVM, pVCpu);
436	if ( rcStrict2 != VINF_SUCCESS
437	&& ( rcStrict == VINF_SUCCESS
438	\|\| RT_FAILURE(rcStrict2)
439	\|\| rcStrict2 < rcStrict) ) /** @todo oversimplified? */
440	rcStrict = rcStrict2;
441	}
442	}
443
444	return VBOXSTRICTRC_TODO(rcStrict);
445	}
446
447
448	/**
449	* Flag whether the event implies that we're stopped in the hypervisor code
450	* and have to block certain operations.
451	*
452	* @param pVM The cross context VM structure.
453	* @param enmEvent The event.
454	*/
455	static void dbgfR3EventSetStoppedInHyperFlag(PVM pVM, DBGFEVENTTYPE enmEvent)
456	{
457	switch (enmEvent)
458	{
459	case DBGFEVENT_STEPPED_HYPER:
460	case DBGFEVENT_ASSERTION_HYPER:
461	case DBGFEVENT_BREAKPOINT_HYPER:
462	pVM->dbgf.s.fStoppedInHyper = true;
463	break;
464	default:
465	pVM->dbgf.s.fStoppedInHyper = false;
466	break;
467	}
468	}
469
470
471	/**
472	* Try to determine the event context.
473	*
474	* @returns debug event context.
475	* @param pVM The cross context VM structure.
476	*/
477	static DBGFEVENTCTX dbgfR3FigureEventCtx(PVM pVM)
478	{
479	/** @todo SMP support! */
480	PVMCPU pVCpu = &pVM->aCpus[0];
481
482	switch (EMGetState(pVCpu))
483	{
484	case EMSTATE_RAW:
485	case EMSTATE_DEBUG_GUEST_RAW:
486	return DBGFEVENTCTX_RAW;
487
488	case EMSTATE_REM:
489	case EMSTATE_DEBUG_GUEST_REM:
490	return DBGFEVENTCTX_REM;
491
492	case EMSTATE_DEBUG_HYPER:
493	case EMSTATE_GURU_MEDITATION:
494	return DBGFEVENTCTX_HYPER;
495
496	default:
497	return DBGFEVENTCTX_OTHER;
498	}
499	}
500
501	/**
502	* The common event prologue code.
503	* It will set the 'stopped-in-hyper' flag, make sure someone is attached,
504	* and perhaps process any high priority pending actions (none yet).
505	*
506	* @returns VBox status code.
507	* @param pVM The cross context VM structure.
508	* @param enmEvent The event to be sent.
509	*/
510	static int dbgfR3EventPrologue(PVM pVM, DBGFEVENTTYPE enmEvent)
511	{
512	/** @todo SMP */
513	PVMCPU pVCpu = VMMGetCpu(pVM);
514
515	/*
516	* Check if a debugger is attached.
517	*/
518	if ( !pVM->dbgf.s.fAttached
519	&& !dbgfR3WaitForAttach(pVM, pVCpu, enmEvent))
520	{
521	Log(("DBGFR3VMMEventSrc: enmEvent=%d - debugger not attached\n", enmEvent));
522	return VERR_DBGF_NOT_ATTACHED;
523	}
524
525	/*
526	* Sync back the state from the REM.
527	*/
528	dbgfR3EventSetStoppedInHyperFlag(pVM, enmEvent);
529	#ifdef VBOX_WITH_REM
530	if (!pVM->dbgf.s.fStoppedInHyper)
531	REMR3StateUpdate(pVM, pVCpu);
532	#endif
533
534	/*
535	* Look thru pending commands and finish those which make sense now.
536	*/
537	/** @todo Process/purge pending commands. */
538	//int rc = DBGFR3VMMForcedAction(pVM);
539	return VINF_SUCCESS;
540	}
541
542
543	/**
544	* Sends the event in the event buffer.
545	*
546	* @returns VBox status code.
547	* @param pVM The cross context VM structure.
548	*/
549	static int dbgfR3SendEvent(PVM pVM)
550	{
551	int rc = RTSemPing(&pVM->dbgf.s.PingPong);
552	if (RT_SUCCESS(rc))
553	rc = dbgfR3VMMWait(pVM);
554
555	pVM->dbgf.s.fStoppedInHyper = false;
556	/** @todo sync VMM -> REM after exitting the debugger. everything may change while in the debugger! */
557	return rc;
558	}
559
560
561	/**
562	* Processes a pending event on the current CPU.
563	*
564	* This is called by EM in response to VINF_EM_DBG_EVENT.
565	*
566	* @returns Strict VBox status code.
567	* @param pVM The cross context VM structure.
568	* @param pVCpu The cross context per CPU structure.
569	*
570	* @thread EMT(pVCpu)
571	*/
572	VMMR3_INT_DECL(VBOXSTRICTRC) DBGFR3EventHandlePending(PVM pVM, PVMCPU pVCpu)
573	{
574	VMCPU_ASSERT_EMT(pVCpu);
575	VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_DBGF);
576
577	/*
578	* Check that we've got an event first.
579	*/
580	AssertReturn(pVCpu->dbgf.s.cEvents > 0, VINF_SUCCESS);
581	AssertReturn(pVCpu->dbgf.s.aEvents[pVCpu->dbgf.s.cEvents - 1].enmState == DBGFEVENTSTATE_CURRENT, VINF_SUCCESS);
582	PDBGFEVENT pEvent = &pVCpu->dbgf.s.aEvents[pVCpu->dbgf.s.cEvents - 1].Event;
583
584	/*
585	* Make sure we've got a debugger and is allowed to speak to it.
586	*/
587	int rc = dbgfR3EventPrologue(pVM, pEvent->enmType);
588	if (RT_FAILURE(rc))
589	{
590	/** @todo drop them events? */
591	return rc;
592	}
593
594	/** @todo SMP + debugger speaker logic */
595	/*
596	* Copy the event over and mark it as ignore.
597	*/
598	pVM->dbgf.s.DbgEvent = *pEvent;
599	pVCpu->dbgf.s.aEvents[pVCpu->dbgf.s.cEvents - 1].enmState = DBGFEVENTSTATE_IGNORE;
600	return dbgfR3SendEvent(pVM);
601	}
602
603
604	/**
605	* Send a generic debugger event which takes no data.
606	*
607	* @returns VBox status code.
608	* @param pVM The cross context VM structure.
609	* @param enmEvent The event to send.
610	* @internal
611	*/
612	VMMR3DECL(int) DBGFR3Event(PVM pVM, DBGFEVENTTYPE enmEvent)
613	{
614	int rc = dbgfR3EventPrologue(pVM, enmEvent);
615	if (RT_FAILURE(rc))
616	return rc;
617
618	/*
619	* Send the event and process the reply communication.
620	*/
621	pVM->dbgf.s.DbgEvent.enmType = enmEvent;
622	pVM->dbgf.s.DbgEvent.enmCtx = dbgfR3FigureEventCtx(pVM);
623	return dbgfR3SendEvent(pVM);
624	}
625
626
627	/**
628	* Send a debugger event which takes the full source file location.
629	*
630	* @returns VBox status code.
631	* @param pVM The cross context VM structure.
632	* @param enmEvent The event to send.
633	* @param pszFile Source file.
634	* @param uLine Line number in source file.
635	* @param pszFunction Function name.
636	* @param pszFormat Message which accompanies the event.
637	* @param ... Message arguments.
638	* @internal
639	*/
640	VMMR3DECL(int) DBGFR3EventSrc(PVM pVM, DBGFEVENTTYPE enmEvent, const char pszFile, unsigned uLine, const char pszFunction, const char *pszFormat, ...)
641	{
642	va_list args;
643	va_start(args, pszFormat);
644	int rc = DBGFR3EventSrcV(pVM, enmEvent, pszFile, uLine, pszFunction, pszFormat, args);
645	va_end(args);
646	return rc;
647	}
648
649
650	/**
651	* Send a debugger event which takes the full source file location.
652	*
653	* @returns VBox status code.
654	* @param pVM The cross context VM structure.
655	* @param enmEvent The event to send.
656	* @param pszFile Source file.
657	* @param uLine Line number in source file.
658	* @param pszFunction Function name.
659	* @param pszFormat Message which accompanies the event.
660	* @param args Message arguments.
661	* @internal
662	*/
663	VMMR3DECL(int) DBGFR3EventSrcV(PVM pVM, DBGFEVENTTYPE enmEvent, const char pszFile, unsigned uLine, const char pszFunction, const char *pszFormat, va_list args)
664	{
665	int rc = dbgfR3EventPrologue(pVM, enmEvent);
666	if (RT_FAILURE(rc))
667	return rc;
668
669	/*
670	* Format the message.
671	*/
672	char *pszMessage = NULL;
673	char szMessage[8192];
674	if (pszFormat && *pszFormat)
675	{
676	pszMessage = &szMessage[0];
677	RTStrPrintfV(szMessage, sizeof(szMessage), pszFormat, args);
678	}
679
680	/*
681	* Send the event and process the reply communication.
682	*/
683	pVM->dbgf.s.DbgEvent.enmType = enmEvent;
684	pVM->dbgf.s.DbgEvent.enmCtx = dbgfR3FigureEventCtx(pVM);
685	pVM->dbgf.s.DbgEvent.u.Src.pszFile = pszFile;
686	pVM->dbgf.s.DbgEvent.u.Src.uLine = uLine;
687	pVM->dbgf.s.DbgEvent.u.Src.pszFunction = pszFunction;
688	pVM->dbgf.s.DbgEvent.u.Src.pszMessage = pszMessage;
689	return dbgfR3SendEvent(pVM);
690	}
691
692
693	/**
694	* Send a debugger event which takes the two assertion messages.
695	*
696	* @returns VBox status code.
697	* @param pVM The cross context VM structure.
698	* @param enmEvent The event to send.
699	* @param pszMsg1 First assertion message.
700	* @param pszMsg2 Second assertion message.
701	*/
702	VMMR3_INT_DECL(int) DBGFR3EventAssertion(PVM pVM, DBGFEVENTTYPE enmEvent, const char pszMsg1, const char pszMsg2)
703	{
704	int rc = dbgfR3EventPrologue(pVM, enmEvent);
705	if (RT_FAILURE(rc))
706	return rc;
707
708	/*
709	* Send the event and process the reply communication.
710	*/
711	pVM->dbgf.s.DbgEvent.enmType = enmEvent;
712	pVM->dbgf.s.DbgEvent.enmCtx = dbgfR3FigureEventCtx(pVM);
713	pVM->dbgf.s.DbgEvent.u.Assert.pszMsg1 = pszMsg1;
714	pVM->dbgf.s.DbgEvent.u.Assert.pszMsg2 = pszMsg2;
715	return dbgfR3SendEvent(pVM);
716	}
717
718
719	/**
720	* Breakpoint was hit somewhere.
721	* Figure out which breakpoint it is and notify the debugger.
722	*
723	* @returns VBox status code.
724	* @param pVM The cross context VM structure.
725	* @param enmEvent DBGFEVENT_BREAKPOINT_HYPER or DBGFEVENT_BREAKPOINT.
726	*/
727	VMMR3_INT_DECL(int) DBGFR3EventBreakpoint(PVM pVM, DBGFEVENTTYPE enmEvent)
728	{
729	int rc = dbgfR3EventPrologue(pVM, enmEvent);
730	if (RT_FAILURE(rc))
731	return rc;
732
733	/*
734	* Send the event and process the reply communication.
735	*/
736	/** @todo SMP */
737	PVMCPU pVCpu = VMMGetCpu0(pVM);
738
739	pVM->dbgf.s.DbgEvent.enmType = enmEvent;
740	RTUINT iBp = pVM->dbgf.s.DbgEvent.u.Bp.iBp = pVCpu->dbgf.s.iActiveBp;
741	pVCpu->dbgf.s.iActiveBp = ~0U;
742	if (iBp != ~0U)
743	pVM->dbgf.s.DbgEvent.enmCtx = DBGFEVENTCTX_RAW;
744	else
745	{
746	/* REM breakpoints has be been searched for. */
747	#if 0 /** @todo get flat PC api! */
748	uint32_t eip = CPUMGetGuestEIP(pVM);
749	#else
750	/* @todo SMP support!! */
751	PCPUMCTX pCtx = CPUMQueryGuestCtxPtr(VMMGetCpu(pVM));
752	RTGCPTR eip = pCtx->rip + pCtx->cs.u64Base;
753	#endif
754	for (size_t i = 0; i < RT_ELEMENTS(pVM->dbgf.s.aBreakpoints); i++)
755	if ( pVM->dbgf.s.aBreakpoints[i].enmType == DBGFBPTYPE_REM
756	&& pVM->dbgf.s.aBreakpoints[i].u.Rem.GCPtr == eip)
757	{
758	pVM->dbgf.s.DbgEvent.u.Bp.iBp = pVM->dbgf.s.aBreakpoints[i].iBp;
759	break;
760	}
761	AssertMsg(pVM->dbgf.s.DbgEvent.u.Bp.iBp != ~0U, ("eip=%08x\n", eip));
762	pVM->dbgf.s.DbgEvent.enmCtx = DBGFEVENTCTX_REM;
763	}
764	return dbgfR3SendEvent(pVM);
765	}
766
767
768	/**
769	* Waits for the debugger to respond.
770	*
771	* @returns VBox status code. (clearify)
772	* @param pVM The cross context VM structure.
773	*/
774	static int dbgfR3VMMWait(PVM pVM)
775	{
776	PVMCPU pVCpu = VMMGetCpu(pVM);
777
778	LogFlow(("dbgfR3VMMWait:\n"));
779	int rcRet = VINF_SUCCESS;
780
781	/*
782	* Waits for the debugger to reply (i.e. issue an command).
783	*/
784	for (;;)
785	{
786	/*
787	* Wait.
788	*/
789	uint32_t cPollHack = 1; /** @todo this interface is horrible now that we're using lots of VMR3ReqCall stuff all over DBGF. */
790	for (;;)
791	{
792	int rc;
793	if ( !VM_FF_IS_PENDING(pVM, VM_FF_EMT_RENDEZVOUS \| VM_FF_REQUEST)
794	&& !VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_REQUEST))
795	{
796	rc = RTSemPingWait(&pVM->dbgf.s.PingPong, cPollHack);
797	if (RT_SUCCESS(rc))
798	break;
799	if (rc != VERR_TIMEOUT)
800	{
801	LogFlow(("dbgfR3VMMWait: returns %Rrc\n", rc));
802	return rc;
803	}
804	}
805
806	if (VM_FF_IS_PENDING(pVM, VM_FF_EMT_RENDEZVOUS))
807	{
808	rc = VMMR3EmtRendezvousFF(pVM, pVCpu);
809	cPollHack = 1;
810	}
811	else if ( VM_FF_IS_PENDING(pVM, VM_FF_REQUEST)
812	\|\| VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_REQUEST))
813	{
814	LogFlow(("dbgfR3VMMWait: Processes requests...\n"));
815	rc = VMR3ReqProcessU(pVM->pUVM, VMCPUID_ANY, false /fPriorityOnly/);
816	if (rc == VINF_SUCCESS)
817	rc = VMR3ReqProcessU(pVM->pUVM, pVCpu->idCpu, false /fPriorityOnly/);
818	LogFlow(("dbgfR3VMMWait: VMR3ReqProcess -> %Rrc rcRet=%Rrc\n", rc, rcRet));
819	cPollHack = 1;
820	}
821	else
822	{
823	rc = VINF_SUCCESS;
824	if (cPollHack < 120)
825	cPollHack++;
826	}
827
828	if (rc >= VINF_EM_FIRST && rc <= VINF_EM_LAST)
829	{
830	switch (rc)
831	{
832	case VINF_EM_DBG_BREAKPOINT:
833	case VINF_EM_DBG_STEPPED:
834	case VINF_EM_DBG_STEP:
835	case VINF_EM_DBG_STOP:
836	case VINF_EM_DBG_EVENT:
837	AssertMsgFailed(("rc=%Rrc\n", rc));
838	break;
839
840	/* return straight away */
841	case VINF_EM_TERMINATE:
842	case VINF_EM_OFF:
843	LogFlow(("dbgfR3VMMWait: returns %Rrc\n", rc));
844	return rc;
845
846	/* remember return code. */
847	default:
848	AssertReleaseMsgFailed(("rc=%Rrc is not in the switch!\n", rc));
849	case VINF_EM_RESET:
850	case VINF_EM_SUSPEND:
851	case VINF_EM_HALT:
852	case VINF_EM_RESUME:
853	case VINF_EM_RESCHEDULE:
854	case VINF_EM_RESCHEDULE_REM:
855	case VINF_EM_RESCHEDULE_RAW:
856	if (rc < rcRet \|\| rcRet == VINF_SUCCESS)
857	rcRet = rc;
858	break;
859	}
860	}
861	else if (RT_FAILURE(rc))
862	{
863	LogFlow(("dbgfR3VMMWait: returns %Rrc\n", rc));
864	return rc;
865	}
866	}
867
868	/*
869	* Process the command.
870	*/
871	bool fResumeExecution;
872	DBGFCMDDATA CmdData = pVM->dbgf.s.VMMCmdData;
873	DBGFCMD enmCmd = dbgfR3SetCmd(pVM, DBGFCMD_NO_COMMAND);
874	int rc = dbgfR3VMMCmd(pVM, enmCmd, &CmdData, &fResumeExecution);
875	if (fResumeExecution)
876	{
877	if (RT_FAILURE(rc))
878	rcRet = rc;
879	else if ( rc >= VINF_EM_FIRST
880	&& rc <= VINF_EM_LAST
881	&& (rc < rcRet \|\| rcRet == VINF_SUCCESS))
882	rcRet = rc;
883	LogFlow(("dbgfR3VMMWait: returns %Rrc\n", rcRet));
884	return rcRet;
885	}
886	}
887	}
888
889
890	/**
891	* Executes command from debugger.
892	* The caller is responsible for waiting or resuming execution based on the
893	* value returned in the *pfResumeExecution indicator.
894	*
895	* @returns VBox status code. (clearify!)
896	* @param pVM The cross context VM structure.
897	* @param enmCmd The command in question.
898	* @param pCmdData Pointer to the command data.
899	* @param pfResumeExecution Where to store the resume execution / continue waiting indicator.
900	*/
901	static int dbgfR3VMMCmd(PVM pVM, DBGFCMD enmCmd, PDBGFCMDDATA pCmdData, bool *pfResumeExecution)
902	{
903	bool fSendEvent;
904	bool fResume;
905	int rc = VINF_SUCCESS;
906
907	NOREF(pCmdData); /* for later */
908
909	switch (enmCmd)
910	{
911	/*
912	* Halt is answered by an event say that we've halted.
913	*/
914	case DBGFCMD_HALT:
915	{
916	pVM->dbgf.s.DbgEvent.enmType = DBGFEVENT_HALT_DONE;
917	pVM->dbgf.s.DbgEvent.enmCtx = dbgfR3FigureEventCtx(pVM);
918	fSendEvent = true;
919	fResume = false;
920	break;
921	}
922
923
924	/*
925	* Resume is not answered we'll just resume execution.
926	*/
927	case DBGFCMD_GO:
928	{
929	/** @todo SMP */
930	PVMCPU pVCpu = VMMGetCpu0(pVM);
931	pVCpu->dbgf.s.fSingleSteppingRaw = false;
932	fSendEvent = false;
933	fResume = true;
934	break;
935	}
936
937	/** @todo implement (and define) the rest of the commands. */
938
939	/*
940	* Disable breakpoints and stuff.
941	* Send an everythings cool event to the debugger thread and resume execution.
942	*/
943	case DBGFCMD_DETACH_DEBUGGER:
944	{
945	ASMAtomicWriteBool(&pVM->dbgf.s.fAttached, false);
946	pVM->dbgf.s.DbgEvent.enmType = DBGFEVENT_DETACH_DONE;
947	pVM->dbgf.s.DbgEvent.enmCtx = DBGFEVENTCTX_OTHER;
948	fSendEvent = true;
949	fResume = true;
950	break;
951	}
952
953	/*
954	* The debugger has detached successfully.
955	* There is no reply to this event.
956	*/
957	case DBGFCMD_DETACHED_DEBUGGER:
958	{
959	fSendEvent = false;
960	fResume = true;
961	break;
962	}
963
964	/*
965	* Single step, with trace into.
966	*/
967	case DBGFCMD_SINGLE_STEP:
968	{
969	Log2(("Single step\n"));
970	rc = VINF_EM_DBG_STEP;
971	/** @todo SMP */
972	PVMCPU pVCpu = VMMGetCpu0(pVM);
973	pVCpu->dbgf.s.fSingleSteppingRaw = true;
974	fSendEvent = false;
975	fResume = true;
976	break;
977	}
978
979	/*
980	* Default is to send an invalid command event.
981	*/
982	default:
983	{
984	pVM->dbgf.s.DbgEvent.enmType = DBGFEVENT_INVALID_COMMAND;
985	pVM->dbgf.s.DbgEvent.enmCtx = dbgfR3FigureEventCtx(pVM);
986	fSendEvent = true;
987	fResume = false;
988	break;
989	}
990	}
991
992	/*
993	* Send pending event.
994	*/
995	if (fSendEvent)
996	{
997	Log2(("DBGF: Emulation thread: sending event %d\n", pVM->dbgf.s.DbgEvent.enmType));
998	int rc2 = RTSemPing(&pVM->dbgf.s.PingPong);
999	if (RT_FAILURE(rc2))
1000	{
1001	AssertRC(rc2);
1002	*pfResumeExecution = true;
1003	return rc2;
1004	}
1005	}
1006
1007	/*
1008	* Return.
1009	*/
1010	*pfResumeExecution = fResume;
1011	return rc;
1012	}
1013
1014
1015	/**
1016	* Attaches a debugger to the specified VM.
1017	*
1018	* Only one debugger at a time.
1019	*
1020	* @returns VBox status code.
1021	* @param pUVM The user mode VM handle.
1022	*/
1023	VMMR3DECL(int) DBGFR3Attach(PUVM pUVM)
1024	{
1025	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1026	PVM pVM = pUVM->pVM;
1027	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1028
1029	/*
1030	* Call the VM, use EMT for serialization.
1031	*
1032	* Using a priority call here so we can actually attach a debugger during
1033	* the countdown in dbgfR3WaitForAttach.
1034	*/
1035	/** @todo SMP */
1036	return VMR3ReqPriorityCallWait(pVM, VMCPUID_ANY, (PFNRT)dbgfR3Attach, 1, pVM);
1037	}
1038
1039
1040	/**
1041	* EMT worker for DBGFR3Attach.
1042	*
1043	* @returns VBox status code.
1044	* @param pVM The cross context VM structure.
1045	*/
1046	static DECLCALLBACK(int) dbgfR3Attach(PVM pVM)
1047	{
1048	if (pVM->dbgf.s.fAttached)
1049	{
1050	Log(("dbgR3Attach: Debugger already attached\n"));
1051	return VERR_DBGF_ALREADY_ATTACHED;
1052	}
1053
1054	/*
1055	* Create the Ping-Pong structure.
1056	*/
1057	int rc = RTSemPingPongInit(&pVM->dbgf.s.PingPong);
1058	AssertRCReturn(rc, rc);
1059
1060	/*
1061	* Set the attached flag.
1062	*/
1063	ASMAtomicWriteBool(&pVM->dbgf.s.fAttached, true);
1064	return VINF_SUCCESS;
1065	}
1066
1067
1068	/**
1069	* Detaches a debugger from the specified VM.
1070	*
1071	* Caller must be attached to the VM.
1072	*
1073	* @returns VBox status code.
1074	* @param pUVM The user mode VM handle.
1075	*/
1076	VMMR3DECL(int) DBGFR3Detach(PUVM pUVM)
1077	{
1078	LogFlow(("DBGFR3Detach:\n"));
1079	int rc;
1080
1081	/*
1082	* Validate input. The UVM handle shall be valid, the VM handle might be
1083	* in the processes of being destroyed already, so deal quietly with that.
1084	*/
1085	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1086	PVM pVM = pUVM->pVM;
1087	if (!VM_IS_VALID_EXT(pVM))
1088	return VERR_INVALID_VM_HANDLE;
1089
1090	/*
1091	* Check if attached.
1092	*/
1093	if (!pVM->dbgf.s.fAttached)
1094	return VERR_DBGF_NOT_ATTACHED;
1095
1096	/*
1097	* Try send the detach command.
1098	* Keep in mind that we might be racing EMT, so, be extra careful.
1099	*/
1100	DBGFCMD enmCmd = dbgfR3SetCmd(pVM, DBGFCMD_DETACH_DEBUGGER);
1101	if (RTSemPongIsSpeaker(&pVM->dbgf.s.PingPong))
1102	{
1103	rc = RTSemPong(&pVM->dbgf.s.PingPong);
1104	AssertMsgRCReturn(rc, ("Failed to signal emulation thread. rc=%Rrc\n", rc), rc);
1105	LogRel(("DBGFR3Detach: enmCmd=%d (pong -> ping)\n", enmCmd));
1106	}
1107
1108	/*
1109	* Wait for the OK event.
1110	*/
1111	rc = RTSemPongWait(&pVM->dbgf.s.PingPong, RT_INDEFINITE_WAIT);
1112	AssertLogRelMsgRCReturn(rc, ("Wait on detach command failed, rc=%Rrc\n", rc), rc);
1113
1114	/*
1115	* Send the notification command indicating that we're really done.
1116	*/
1117	enmCmd = dbgfR3SetCmd(pVM, DBGFCMD_DETACHED_DEBUGGER);
1118	rc = RTSemPong(&pVM->dbgf.s.PingPong);
1119	AssertMsgRCReturn(rc, ("Failed to signal emulation thread. rc=%Rrc\n", rc), rc);
1120
1121	LogFlowFunc(("returns VINF_SUCCESS\n"));
1122	return VINF_SUCCESS;
1123	}
1124
1125
1126	/**
1127	* Wait for a debug event.
1128	*
1129	* @returns VBox status code. Will not return VBOX_INTERRUPTED.
1130	* @param pUVM The user mode VM handle.
1131	* @param cMillies Number of millis to wait.
1132	* @param ppEvent Where to store the event pointer.
1133	*/
1134	VMMR3DECL(int) DBGFR3EventWait(PUVM pUVM, RTMSINTERVAL cMillies, PCDBGFEVENT *ppEvent)
1135	{
1136	/*
1137	* Check state.
1138	*/
1139	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1140	PVM pVM = pUVM->pVM;
1141	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1142	AssertReturn(pVM->dbgf.s.fAttached, VERR_DBGF_NOT_ATTACHED);
1143	*ppEvent = NULL;
1144
1145	/*
1146	* Wait.
1147	*/
1148	int rc = RTSemPongWait(&pVM->dbgf.s.PingPong, cMillies);
1149	if (RT_SUCCESS(rc))
1150	{
1151	*ppEvent = &pVM->dbgf.s.DbgEvent;
1152	Log2(("DBGF: Debugger thread: receiving event %d\n", (*ppEvent)->enmType));
1153	return VINF_SUCCESS;
1154	}
1155
1156	return rc;
1157	}
1158
1159
1160	/**
1161	* Halts VM execution.
1162	*
1163	* After calling this the VM isn't actually halted till an DBGFEVENT_HALT_DONE
1164	* arrives. Until that time it's not possible to issue any new commands.
1165	*
1166	* @returns VBox status code.
1167	* @param pUVM The user mode VM handle.
1168	*/
1169	VMMR3DECL(int) DBGFR3Halt(PUVM pUVM)
1170	{
1171	/*
1172	* Check state.
1173	*/
1174	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1175	PVM pVM = pUVM->pVM;
1176	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1177	AssertReturn(pVM->dbgf.s.fAttached, VERR_DBGF_NOT_ATTACHED);
1178	RTPINGPONGSPEAKER enmSpeaker = pVM->dbgf.s.PingPong.enmSpeaker;
1179	if ( enmSpeaker == RTPINGPONGSPEAKER_PONG
1180	\|\| enmSpeaker == RTPINGPONGSPEAKER_PONG_SIGNALED)
1181	return VWRN_DBGF_ALREADY_HALTED;
1182
1183	/*
1184	* Send command.
1185	*/
1186	dbgfR3SetCmd(pVM, DBGFCMD_HALT);
1187
1188	return VINF_SUCCESS;
1189	}
1190
1191
1192	/**
1193	* Checks if the VM is halted by the debugger.
1194	*
1195	* @returns True if halted.
1196	* @returns False if not halted.
1197	* @param pUVM The user mode VM handle.
1198	*/
1199	VMMR3DECL(bool) DBGFR3IsHalted(PUVM pUVM)
1200	{
1201	UVM_ASSERT_VALID_EXT_RETURN(pUVM, false);
1202	PVM pVM = pUVM->pVM;
1203	VM_ASSERT_VALID_EXT_RETURN(pVM, false);
1204	AssertReturn(pVM->dbgf.s.fAttached, false);
1205
1206	RTPINGPONGSPEAKER enmSpeaker = pVM->dbgf.s.PingPong.enmSpeaker;
1207	return enmSpeaker == RTPINGPONGSPEAKER_PONG_SIGNALED
1208	\|\| enmSpeaker == RTPINGPONGSPEAKER_PONG;
1209	}
1210
1211
1212	/**
1213	* Checks if the debugger can wait for events or not.
1214	*
1215	* This function is only used by lazy, multiplexing debuggers. :-)
1216	*
1217	* @returns VBox status code.
1218	* @retval VINF_SUCCESS if waitable.
1219	* @retval VERR_SEM_OUT_OF_TURN if not waitable.
1220	* @retval VERR_INVALID_VM_HANDLE if the VM is being (/ has been) destroyed
1221	* (not asserted) or if the handle is invalid (asserted).
1222	* @retval VERR_DBGF_NOT_ATTACHED if not attached.
1223	*
1224	* @param pUVM The user mode VM handle.
1225	*/
1226	VMMR3DECL(int) DBGFR3QueryWaitable(PUVM pUVM)
1227	{
1228	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1229
1230	/* Note! There is a slight race here, unfortunately. */
1231	PVM pVM = pUVM->pVM;
1232	if (!RT_VALID_PTR(pVM))
1233	return VERR_INVALID_VM_HANDLE;
1234	if (pVM->enmVMState >= VMSTATE_DESTROYING)
1235	return VERR_INVALID_VM_HANDLE;
1236	if (!pVM->dbgf.s.fAttached)
1237	return VERR_DBGF_NOT_ATTACHED;
1238
1239	if (!RTSemPongShouldWait(&pVM->dbgf.s.PingPong))
1240	return VERR_SEM_OUT_OF_TURN;
1241
1242	return VINF_SUCCESS;
1243	}
1244
1245
1246	/**
1247	* Resumes VM execution.
1248	*
1249	* There is no receipt event on this command.
1250	*
1251	* @returns VBox status code.
1252	* @param pUVM The user mode VM handle.
1253	*/
1254	VMMR3DECL(int) DBGFR3Resume(PUVM pUVM)
1255	{
1256	/*
1257	* Check state.
1258	*/
1259	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1260	PVM pVM = pUVM->pVM;
1261	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1262	AssertReturn(pVM->dbgf.s.fAttached, VERR_DBGF_NOT_ATTACHED);
1263	if (RT_LIKELY(RTSemPongIsSpeaker(&pVM->dbgf.s.PingPong)))
1264	{ /* likely */ }
1265	else
1266	return VERR_SEM_OUT_OF_TURN;
1267
1268	/*
1269	* Send the ping back to the emulation thread telling it to run.
1270	*/
1271	dbgfR3SetCmd(pVM, DBGFCMD_GO);
1272	int rc = RTSemPong(&pVM->dbgf.s.PingPong);
1273	AssertRC(rc);
1274
1275	return rc;
1276	}
1277
1278
1279	/**
1280	* Step Into.
1281	*
1282	* A single step event is generated from this command.
1283	* The current implementation is not reliable, so don't rely on the event coming.
1284	*
1285	* @returns VBox status code.
1286	* @param pUVM The user mode VM handle.
1287	* @param idCpu The ID of the CPU to single step on.
1288	*/
1289	VMMR3DECL(int) DBGFR3Step(PUVM pUVM, VMCPUID idCpu)
1290	{
1291	/*
1292	* Check state.
1293	*/
1294	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1295	PVM pVM = pUVM->pVM;
1296	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1297	AssertReturn(idCpu < pVM->cCpus, VERR_INVALID_PARAMETER);
1298	AssertReturn(pVM->dbgf.s.fAttached, VERR_DBGF_NOT_ATTACHED);
1299	if (RT_LIKELY(RTSemPongIsSpeaker(&pVM->dbgf.s.PingPong)))
1300	{ /* likely */ }
1301	else
1302	return VERR_SEM_OUT_OF_TURN;
1303
1304	/*
1305	* Send the ping back to the emulation thread telling it to run.
1306	*/
1307	/** @todo SMP (idCpu) */
1308	dbgfR3SetCmd(pVM, DBGFCMD_SINGLE_STEP);
1309	int rc = RTSemPong(&pVM->dbgf.s.PingPong);
1310	AssertRC(rc);
1311	return rc;
1312	}
1313
1314
1315
1316	/**
1317	* dbgfR3EventConfigEx argument packet.
1318	*/
1319	typedef struct DBGFR3EVENTCONFIGEXARGS
1320	{
1321	PCDBGFEVENTCONFIG paConfigs;
1322	size_t cConfigs;
1323	int rc;
1324	} DBGFR3EVENTCONFIGEXARGS;
1325	/** Pointer to a dbgfR3EventConfigEx argument packet. */
1326	typedef DBGFR3EVENTCONFIGEXARGS *PDBGFR3EVENTCONFIGEXARGS;
1327
1328
1329	/**
1330	* @callback_method_impl{FNVMMEMTRENDEZVOUS, Worker for DBGFR3EventConfigEx.}
1331	*/
1332	static DECLCALLBACK(VBOXSTRICTRC) dbgfR3EventConfigEx(PVM pVM, PVMCPU pVCpu, void *pvUser)
1333	{
1334	if (pVCpu->idCpu == 0)
1335	{
1336	PDBGFR3EVENTCONFIGEXARGS pArgs = (PDBGFR3EVENTCONFIGEXARGS)pvUser;
1337	DBGFEVENTCONFIG volatile const *paConfigs = pArgs->paConfigs;
1338	size_t cConfigs = pArgs->cConfigs;
1339
1340	/*
1341	* Apply the changes.
1342	*/
1343	unsigned cChanges = 0;
1344	for (uint32_t i = 0; i < cConfigs; i++)
1345	{
1346	DBGFEVENTTYPE enmType = paConfigs[i].enmType;
1347	AssertReturn(enmType >= DBGFEVENT_FIRST_SELECTABLE && enmType < DBGFEVENT_END, VERR_INVALID_PARAMETER);
1348	if (paConfigs[i].fEnabled)
1349	cChanges += ASMAtomicBitTestAndSet(&pVM->dbgf.s.bmSelectedEvents, enmType) == false;
1350	else
1351	cChanges += ASMAtomicBitTestAndClear(&pVM->dbgf.s.bmSelectedEvents, enmType) == true;
1352	}
1353
1354	/*
1355	* Inform HM about changes.
1356	*/
1357	if (cChanges > 0 && HMIsEnabled(pVM))
1358	{
1359	HMR3NotifyDebugEventChanged(pVM);
1360	HMR3NotifyDebugEventChangedPerCpu(pVM, pVCpu);
1361	}
1362	}
1363	else if (HMIsEnabled(pVM))
1364	HMR3NotifyDebugEventChangedPerCpu(pVM, pVCpu);
1365
1366	return VINF_SUCCESS;
1367	}
1368
1369
1370	/**
1371	* Configures (enables/disables) multiple selectable debug events.
1372	*
1373	* @returns VBox status code.
1374	* @param pUVM The user mode VM handle.
1375	* @param paConfigs The event to configure and their new state.
1376	* @param cConfigs Number of entries in @a paConfigs.
1377	*/
1378	VMMR3DECL(int) DBGFR3EventConfigEx(PUVM pUVM, PCDBGFEVENTCONFIG paConfigs, size_t cConfigs)
1379	{
1380	/*
1381	* Validate input.
1382	*/
1383	size_t i = cConfigs;
1384	while (i-- > 0)
1385	{
1386	AssertReturn(paConfigs[i].enmType >= DBGFEVENT_FIRST_SELECTABLE, VERR_INVALID_PARAMETER);
1387	AssertReturn(paConfigs[i].enmType < DBGFEVENT_END, VERR_INVALID_PARAMETER);
1388	}
1389	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1390	PVM pVM = pUVM->pVM;
1391	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1392
1393	/*
1394	* Apply the changes in EMT(0) and rendezvous with the other CPUs so they
1395	* can sync their data and execution with new debug state.
1396	*/
1397	DBGFR3EVENTCONFIGEXARGS Args = { paConfigs, cConfigs, VINF_SUCCESS };
1398	int rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ASCENDING \| VMMEMTRENDEZVOUS_FLAGS_PRIORITY,
1399	dbgfR3EventConfigEx, &Args);
1400	if (RT_SUCCESS(rc))
1401	rc = Args.rc;
1402	return rc;
1403	}
1404
1405
1406	/**
1407	* Enables or disables a selectable debug event.
1408	*
1409	* @returns VBox status code.
1410	* @param pUVM The user mode VM handle.
1411	* @param enmEvent The selectable debug event.
1412	* @param fEnabled The new state.
1413	*/
1414	VMMR3DECL(int) DBGFR3EventConfig(PUVM pUVM, DBGFEVENTTYPE enmEvent, bool fEnabled)
1415	{
1416	/*
1417	* Convert to an array call.
1418	*/
1419	DBGFEVENTCONFIG EvtCfg = { enmEvent, fEnabled };
1420	return DBGFR3EventConfigEx(pUVM, &EvtCfg, 1);
1421	}
1422
1423
1424	/**
1425	* Checks if the given selectable event is enabled.
1426	*
1427	* @returns true if enabled, false if not or invalid input.
1428	* @param pUVM The user mode VM handle.
1429	* @param enmEvent The selectable debug event.
1430	* @sa DBGFR3EventQuery
1431	*/
1432	VMMR3DECL(bool) DBGFR3EventIsEnabled(PUVM pUVM, DBGFEVENTTYPE enmEvent)
1433	{
1434	/*
1435	* Validate input.
1436	*/
1437	AssertReturn( enmEvent >= DBGFEVENT_HALT_DONE
1438	&& enmEvent < DBGFEVENT_END, false);
1439	Assert( enmEvent >= DBGFEVENT_FIRST_SELECTABLE
1440	\|\| enmEvent == DBGFEVENT_BREAKPOINT
1441	\|\| enmEvent == DBGFEVENT_BREAKPOINT_IO
1442	\|\| enmEvent == DBGFEVENT_BREAKPOINT_MMIO);
1443
1444	UVM_ASSERT_VALID_EXT_RETURN(pUVM, false);
1445	PVM pVM = pUVM->pVM;
1446	VM_ASSERT_VALID_EXT_RETURN(pVM, false);
1447
1448	/*
1449	* Check the event status.
1450	*/
1451	return ASMBitTest(&pVM->dbgf.s.bmSelectedEvents, enmEvent);
1452	}
1453
1454
1455	/**
1456	* Queries the status of a set of events.
1457	*
1458	* @returns VBox status code.
1459	* @param pUVM The user mode VM handle.
1460	* @param paConfigs The events to query and where to return the state.
1461	* @param cConfigs The number of elements in @a paConfigs.
1462	* @sa DBGFR3EventIsEnabled, DBGF_IS_EVENT_ENABLED
1463	*/
1464	VMMR3DECL(int) DBGFR3EventQuery(PUVM pUVM, PDBGFEVENTCONFIG paConfigs, size_t cConfigs)
1465	{
1466	/*
1467	* Validate input.
1468	*/
1469	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1470	PVM pVM = pUVM->pVM;
1471	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1472
1473	for (size_t i = 0; i < cConfigs; i++)
1474	{
1475	DBGFEVENTTYPE enmType = paConfigs[i].enmType;
1476	AssertReturn( enmType >= DBGFEVENT_HALT_DONE
1477	&& enmType < DBGFEVENT_END, VERR_INVALID_PARAMETER);
1478	Assert( enmType >= DBGFEVENT_FIRST_SELECTABLE
1479	\|\| enmType == DBGFEVENT_BREAKPOINT
1480	\|\| enmType == DBGFEVENT_BREAKPOINT_IO
1481	\|\| enmType == DBGFEVENT_BREAKPOINT_MMIO);
1482	paConfigs[i].fEnabled = ASMBitTest(&pVM->dbgf.s.bmSelectedEvents, paConfigs[i].enmType);
1483	}
1484
1485	return VINF_SUCCESS;
1486	}
1487
1488
1489	/**
1490	* dbgfR3InterruptConfigEx argument packet.
1491	*/
1492	typedef struct DBGFR3INTERRUPTCONFIGEXARGS
1493	{
1494	PCDBGFINTERRUPTCONFIG paConfigs;
1495	size_t cConfigs;
1496	int rc;
1497	} DBGFR3INTERRUPTCONFIGEXARGS;
1498	/** Pointer to a dbgfR3InterruptConfigEx argument packet. */
1499	typedef DBGFR3INTERRUPTCONFIGEXARGS *PDBGFR3INTERRUPTCONFIGEXARGS;
1500
1501	/**
1502	* @callback_method_impl{FNVMMEMTRENDEZVOUS,
1503	* Worker for DBGFR3InterruptConfigEx.}
1504	*/
1505	static DECLCALLBACK(VBOXSTRICTRC) dbgfR3InterruptConfigEx(PVM pVM, PVMCPU pVCpu, void *pvUser)
1506	{
1507	if (pVCpu->idCpu == 0)
1508	{
1509	PDBGFR3INTERRUPTCONFIGEXARGS pArgs = (PDBGFR3INTERRUPTCONFIGEXARGS)pvUser;
1510	PCDBGFINTERRUPTCONFIG paConfigs = pArgs->paConfigs;
1511	size_t cConfigs = pArgs->cConfigs;
1512
1513	/*
1514	* Apply the changes.
1515	*/
1516	bool fChanged = false;
1517	bool fThis;
1518	for (uint32_t i = 0; i < cConfigs; i++)
1519	{
1520	/*
1521	* Hardware interrupts.
1522	*/
1523	if (paConfigs[i].enmHardState == DBGFINTERRUPTSTATE_ENABLED)
1524	{
1525	fChanged \|= fThis = ASMAtomicBitTestAndSet(&pVM->dbgf.s.bmHardIntBreakpoints, paConfigs[i].iInterrupt) == false;
1526	if (fThis)
1527	{
1528	Assert(pVM->dbgf.s.cHardIntBreakpoints < 256);
1529	pVM->dbgf.s.cHardIntBreakpoints++;
1530	}
1531	}
1532	else if (paConfigs[i].enmHardState == DBGFINTERRUPTSTATE_DISABLED)
1533	{
1534	fChanged \|= fThis = ASMAtomicBitTestAndClear(&pVM->dbgf.s.bmHardIntBreakpoints, paConfigs[i].iInterrupt) == true;
1535	if (fThis)
1536	{
1537	Assert(pVM->dbgf.s.cHardIntBreakpoints > 0);
1538	pVM->dbgf.s.cHardIntBreakpoints--;
1539	}
1540	}
1541
1542	/*
1543	* Software interrupts.
1544	*/
1545	if (paConfigs[i].enmHardState == DBGFINTERRUPTSTATE_ENABLED)
1546	{
1547	fChanged \|= fThis = ASMAtomicBitTestAndSet(&pVM->dbgf.s.bmSoftIntBreakpoints, paConfigs[i].iInterrupt) == false;
1548	if (fThis)
1549	{
1550	Assert(pVM->dbgf.s.cSoftIntBreakpoints < 256);
1551	pVM->dbgf.s.cSoftIntBreakpoints++;
1552	}
1553	}
1554	else if (paConfigs[i].enmSoftState == DBGFINTERRUPTSTATE_DISABLED)
1555	{
1556	fChanged \|= fThis = ASMAtomicBitTestAndClear(&pVM->dbgf.s.bmSoftIntBreakpoints, paConfigs[i].iInterrupt) == true;
1557	if (fThis)
1558	{
1559	Assert(pVM->dbgf.s.cSoftIntBreakpoints > 0);
1560	pVM->dbgf.s.cSoftIntBreakpoints--;
1561	}
1562	}
1563	}
1564
1565	/*
1566	* Update the event bitmap entries.
1567	*/
1568	if (pVM->dbgf.s.cHardIntBreakpoints > 0)
1569	fChanged \|= ASMAtomicBitTestAndSet(&pVM->dbgf.s.bmSelectedEvents, DBGFEVENT_INTERRUPT_HARDWARE) == false;
1570	else
1571	fChanged \|= ASMAtomicBitTestAndClear(&pVM->dbgf.s.bmSelectedEvents, DBGFEVENT_INTERRUPT_HARDWARE) == true;
1572
1573	if (pVM->dbgf.s.cSoftIntBreakpoints > 0)
1574	fChanged \|= ASMAtomicBitTestAndSet(&pVM->dbgf.s.bmSelectedEvents, DBGFEVENT_INTERRUPT_SOFTWARE) == false;
1575	else
1576	fChanged \|= ASMAtomicBitTestAndClear(&pVM->dbgf.s.bmSelectedEvents, DBGFEVENT_INTERRUPT_SOFTWARE) == true;
1577
1578	/*
1579	* Inform HM about changes.
1580	*/
1581	if (fChanged && HMIsEnabled(pVM))
1582	{
1583	HMR3NotifyDebugEventChanged(pVM);
1584	HMR3NotifyDebugEventChangedPerCpu(pVM, pVCpu);
1585	}
1586	}
1587	else if (HMIsEnabled(pVM))
1588	HMR3NotifyDebugEventChangedPerCpu(pVM, pVCpu);
1589
1590	return VINF_SUCCESS;
1591	}
1592
1593
1594	/**
1595	* Changes
1596	*
1597	* @returns VBox status code.
1598	* @param pUVM The user mode VM handle.
1599	* @param paConfigs The events to query and where to return the state.
1600	* @param cConfigs The number of elements in @a paConfigs.
1601	* @sa DBGFR3InterruptConfigHardware, DBGFR3InterruptConfigSoftware
1602	*/
1603	VMMR3DECL(int) DBGFR3InterruptConfigEx(PUVM pUVM, PCDBGFINTERRUPTCONFIG paConfigs, size_t cConfigs)
1604	{
1605	/*
1606	* Validate input.
1607	*/
1608	size_t i = cConfigs;
1609	while (i-- > 0)
1610	{
1611	AssertReturn(paConfigs[i].enmHardState <= DBGFINTERRUPTSTATE_DONT_TOUCH, VERR_INVALID_PARAMETER);
1612	AssertReturn(paConfigs[i].enmSoftState <= DBGFINTERRUPTSTATE_DONT_TOUCH, VERR_INVALID_PARAMETER);
1613	}
1614
1615	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1616	PVM pVM = pUVM->pVM;
1617	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1618
1619	/*
1620	* Apply the changes in EMT(0) and rendezvous with the other CPUs so they
1621	* can sync their data and execution with new debug state.
1622	*/
1623	DBGFR3INTERRUPTCONFIGEXARGS Args = { paConfigs, cConfigs, VINF_SUCCESS };
1624	int rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ASCENDING \| VMMEMTRENDEZVOUS_FLAGS_PRIORITY,
1625	dbgfR3InterruptConfigEx, &Args);
1626	if (RT_SUCCESS(rc))
1627	rc = Args.rc;
1628	return rc;
1629	}
1630
1631
1632	/**
1633	* Configures interception of a hardware interrupt.
1634	*
1635	* @returns VBox status code.
1636	* @param pUVM The user mode VM handle.
1637	* @param iInterrupt The interrupt number.
1638	* @param fEnabled Whether interception is enabled or not.
1639	* @sa DBGFR3InterruptSoftwareConfig, DBGFR3InterruptConfigEx
1640	*/
1641	VMMR3DECL(int) DBGFR3InterruptHardwareConfig(PUVM pUVM, uint8_t iInterrupt, bool fEnabled)
1642	{
1643	/*
1644	* Convert to DBGFR3InterruptConfigEx call.
1645	*/
1646	DBGFINTERRUPTCONFIG IntCfg = { iInterrupt, (uint8_t)fEnabled, DBGFINTERRUPTSTATE_DONT_TOUCH };
1647	return DBGFR3InterruptConfigEx(pUVM, &IntCfg, 1);
1648	}
1649
1650
1651	/**
1652	* Configures interception of a software interrupt.
1653	*
1654	* @returns VBox status code.
1655	* @param pUVM The user mode VM handle.
1656	* @param iInterrupt The interrupt number.
1657	* @param fEnabled Whether interception is enabled or not.
1658	* @sa DBGFR3InterruptHardwareConfig, DBGFR3InterruptConfigEx
1659	*/
1660	VMMR3DECL(int) DBGFR3InterruptSoftwareConfig(PUVM pUVM, uint8_t iInterrupt, bool fEnabled)
1661	{
1662	/*
1663	* Convert to DBGFR3InterruptConfigEx call.
1664	*/
1665	DBGFINTERRUPTCONFIG IntCfg = { iInterrupt, DBGFINTERRUPTSTATE_DONT_TOUCH, (uint8_t)fEnabled };
1666	return DBGFR3InterruptConfigEx(pUVM, &IntCfg, 1);
1667	}
1668
1669
1670	/**
1671	* Checks whether interception is enabled for a hardware interrupt.
1672	*
1673	* @returns true if enabled, false if not or invalid input.
1674	* @param pUVM The user mode VM handle.
1675	* @param iInterrupt The interrupt number.
1676	* @sa DBGFR3InterruptSoftwareIsEnabled, DBGF_IS_HARDWARE_INT_ENABLED,
1677	* DBGF_IS_SOFTWARE_INT_ENABLED
1678	*/
1679	VMMR3DECL(int) DBGFR3InterruptHardwareIsEnabled(PUVM pUVM, uint8_t iInterrupt)
1680	{
1681	/*
1682	* Validate input.
1683	*/
1684	UVM_ASSERT_VALID_EXT_RETURN(pUVM, false);
1685	PVM pVM = pUVM->pVM;
1686	VM_ASSERT_VALID_EXT_RETURN(pVM, false);
1687
1688	/*
1689	* Check it.
1690	*/
1691	return ASMBitTest(&pVM->dbgf.s.bmHardIntBreakpoints, iInterrupt);
1692	}
1693
1694
1695	/**
1696	* Checks whether interception is enabled for a software interrupt.
1697	*
1698	* @returns true if enabled, false if not or invalid input.
1699	* @param pUVM The user mode VM handle.
1700	* @param iInterrupt The interrupt number.
1701	* @sa DBGFR3InterruptHardwareIsEnabled, DBGF_IS_SOFTWARE_INT_ENABLED,
1702	* DBGF_IS_HARDWARE_INT_ENABLED,
1703	*/
1704	VMMR3DECL(int) DBGFR3InterruptSoftwareIsEnabled(PUVM pUVM, uint8_t iInterrupt)
1705	{
1706	/*
1707	* Validate input.
1708	*/
1709	UVM_ASSERT_VALID_EXT_RETURN(pUVM, false);
1710	PVM pVM = pUVM->pVM;
1711	VM_ASSERT_VALID_EXT_RETURN(pVM, false);
1712
1713	/*
1714	* Check it.
1715	*/
1716	return ASMBitTest(&pVM->dbgf.s.bmSoftIntBreakpoints, iInterrupt);
1717	}
1718
1719
1720
1721	/**
1722	* Call this to single step programmatically.
1723	*
1724	* You must pass down the return code to the EM loop! That's
1725	* where the actual single stepping take place (at least in the
1726	* current implementation).
1727	*
1728	* @returns VINF_EM_DBG_STEP
1729	*
1730	* @param pVCpu The cross context virtual CPU structure.
1731	*
1732	* @thread VCpu EMT
1733	* @internal
1734	*/
1735	VMMR3_INT_DECL(int) DBGFR3PrgStep(PVMCPU pVCpu)
1736	{
1737	VMCPU_ASSERT_EMT(pVCpu);
1738
1739	pVCpu->dbgf.s.fSingleSteppingRaw = true;
1740	return VINF_EM_DBG_STEP;
1741	}
1742
1743
1744	/**
1745	* Inject an NMI into a running VM (only VCPU 0!)
1746	*
1747	* @returns VBox status code.
1748	* @param pUVM The user mode VM structure.
1749	* @param idCpu The ID of the CPU to inject the NMI on.
1750	*/
1751	VMMR3DECL(int) DBGFR3InjectNMI(PUVM pUVM, VMCPUID idCpu)
1752	{
1753	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1754	PVM pVM = pUVM->pVM;
1755	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1756	AssertReturn(idCpu < pVM->cCpus, VERR_INVALID_CPU_ID);
1757
1758	/** @todo Implement generic NMI injection. */
1759	if (!HMIsEnabled(pVM))
1760	return VERR_NOT_SUP_IN_RAW_MODE;
1761
1762	VMCPU_FF_SET(&pVM->aCpus[idCpu], VMCPU_FF_INTERRUPT_NMI);
1763	return VINF_SUCCESS;
1764	}
1765

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source: vbox/trunk/src/VBox/VMM/VMMR3/DBGF.cpp@ 61744

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