DBGFBp.cpp@ 73269

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1	/* $Id: DBGFBp.cpp 69111 2017-10-17 14:26:02Z vboxsync $ */
2	/** @file
3	* DBGF - Debugger Facility, Breakpoint Management.
4	*/
5
6	/*
7	* Copyright (C) 2006-2017 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	/*********************************************************************************************************************************
20	* Header Files *
21	*********************************************************************************************************************************/
22	#define LOG_GROUP LOG_GROUP_DBGF
23	#include <VBox/vmm/dbgf.h>
24	#include <VBox/vmm/selm.h>
25	#ifdef VBOX_WITH_REM
26	# include <VBox/vmm/rem.h>
27	#else
28	# include <VBox/vmm/iem.h>
29	#endif
30	#include <VBox/vmm/mm.h>
31	#include <VBox/vmm/iom.h>
32	#include <VBox/vmm/hm.h>
33	#include "DBGFInternal.h"
34	#include <VBox/vmm/vm.h>
35	#include <VBox/vmm/uvm.h>
36
37	#include <VBox/err.h>
38	#include <VBox/log.h>
39	#include <iprt/assert.h>
40	#include <iprt/string.h>
41
42
43	/*********************************************************************************************************************************
44	* Structures and Typedefs *
45	*********************************************************************************************************************************/
46	/**
47	* DBGF INT3-breakpoint set callback arguments.
48	*/
49	typedef struct DBGFBPINT3ARGS
50	{
51	/** The source virtual CPU ID (used for breakpoint address resolution). */
52	VMCPUID idSrcCpu;
53	/** The breakpoint address. */
54	PCDBGFADDRESS pAddress;
55	/** The hit count at which the breakpoint starts triggering. */
56	uint64_t iHitTrigger;
57	/** The hit count at which disables the breakpoint. */
58	uint64_t iHitDisable;
59	/** Where to store the breakpoint Id (optional). */
60	uint32_t *piBp;
61	} DBGFBPINT3ARGS;
62	/** Pointer to a DBGF INT3 breakpoint set callback argument. */
63	typedef DBGFBPINT3ARGS *PDBGFBPINT3ARGS;
64
65
66	/*********************************************************************************************************************************
67	* Internal Functions *
68	*********************************************************************************************************************************/
69	RT_C_DECLS_BEGIN
70	static int dbgfR3BpRegArm(PVM pVM, PDBGFBP pBp);
71	static int dbgfR3BpInt3Arm(PVM pVM, PDBGFBP pBp);
72	RT_C_DECLS_END
73
74
75
76	/**
77	* Initialize the breakpoint stuff.
78	*
79	* @returns VINF_SUCCESS
80	* @param pVM The cross context VM structure.
81	*/
82	int dbgfR3BpInit(PVM pVM)
83	{
84	/*
85	* Init structures.
86	*/
87	unsigned i;
88	for (i = 0; i < RT_ELEMENTS(pVM->dbgf.s.aHwBreakpoints); i++)
89	{
90	pVM->dbgf.s.aHwBreakpoints[i].iBp = i;
91	pVM->dbgf.s.aHwBreakpoints[i].enmType = DBGFBPTYPE_FREE;
92	pVM->dbgf.s.aHwBreakpoints[i].u.Reg.iReg = i;
93	}
94
95	for (i = 0; i < RT_ELEMENTS(pVM->dbgf.s.aBreakpoints); i++)
96	{
97	pVM->dbgf.s.aBreakpoints[i].iBp = i + RT_ELEMENTS(pVM->dbgf.s.aHwBreakpoints);
98	pVM->dbgf.s.aBreakpoints[i].enmType = DBGFBPTYPE_FREE;
99	}
100
101	for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
102	{
103	PVMCPU pVCpu = &pVM->aCpus[idCpu];
104	pVCpu->dbgf.s.iActiveBp = ~0U;
105	}
106
107	/*
108	* Register saved state.
109	*/
110	/** @todo */
111
112	return VINF_SUCCESS;
113	}
114
115
116
117	/**
118	* Allocate a breakpoint.
119	*
120	* @returns Pointer to the allocated breakpoint.
121	* @returns NULL if we're out of breakpoints.
122	* @param pVM The cross context VM structure.
123	* @param enmType The type to allocate.
124	*/
125	static PDBGFBP dbgfR3BpAlloc(PVM pVM, DBGFBPTYPE enmType)
126	{
127	/*
128	* Determine which array to search and where in the array to start
129	* searching (latter for grouping similar BPs, reducing runtime overhead).
130	*/
131	unsigned iStart;
132	unsigned cBps;
133	PDBGFBP paBps;
134	switch (enmType)
135	{
136	case DBGFBPTYPE_REG:
137	cBps = RT_ELEMENTS(pVM->dbgf.s.aHwBreakpoints);
138	paBps = &pVM->dbgf.s.aHwBreakpoints[0];
139	iStart = 0;
140	break;
141
142	case DBGFBPTYPE_INT3:
143	case DBGFBPTYPE_REM:
144	case DBGFBPTYPE_PORT_IO:
145	case DBGFBPTYPE_MMIO:
146	cBps = RT_ELEMENTS(pVM->dbgf.s.aBreakpoints);
147	paBps = &pVM->dbgf.s.aBreakpoints[0];
148	if (enmType == DBGFBPTYPE_PORT_IO)
149	iStart = cBps / 4 * 2;
150	else if (enmType == DBGFBPTYPE_MMIO)
151	iStart = cBps / 4 * 1;
152	else if (enmType == DBGFBPTYPE_REM)
153	iStart = cBps / 4 * 3;
154	else
155	iStart = 0;
156	break;
157
158	default:
159	AssertMsgFailed(("enmType=%d\n", enmType));
160	return NULL;
161	}
162
163	/*
164	* Search for a free breakpoint entry.
165	*/
166	unsigned iBp;
167	for (iBp = iStart; iBp < cBps; iBp++)
168	if (paBps[iBp].enmType == DBGFBPTYPE_FREE)
169	break;
170	if (iBp >= cBps && iStart != 0)
171	for (iBp = 0; iBp < cBps; iBp++)
172	if (paBps[iBp].enmType == DBGFBPTYPE_FREE)
173	break;
174	if (iBp < cBps)
175	{
176	/*
177	* Return what we found.
178	*/
179	paBps[iBp].fEnabled = false;
180	paBps[iBp].cHits = 0;
181	paBps[iBp].enmType = enmType;
182	return &paBps[iBp];
183	}
184
185	LogFlow(("dbgfR3BpAlloc: returns NULL - we're out of breakpoint slots! cBps=%u\n", cBps));
186	return NULL;
187	}
188
189
190	/**
191	* Updates the search optimization structure for enabled breakpoints of the
192	* specified type.
193	*
194	* @returns VINF_SUCCESS.
195	* @param pVM The cross context VM structure.
196	* @param enmType The breakpoint type.
197	* @param pOpt The breakpoint optimization structure to update.
198	*/
199	static int dbgfR3BpUpdateSearchOptimizations(PVM pVM, DBGFBPTYPE enmType, PDBGFBPSEARCHOPT pOpt)
200	{
201	DBGFBPSEARCHOPT Opt = { UINT32_MAX, 0 };
202
203	for (uint32_t iBp = 0; iBp < RT_ELEMENTS(pVM->dbgf.s.aBreakpoints); iBp++)
204	if ( pVM->dbgf.s.aBreakpoints[iBp].enmType == enmType
205	&& pVM->dbgf.s.aBreakpoints[iBp].fEnabled)
206	{
207	if (Opt.iStartSearch > iBp)
208	Opt.iStartSearch = iBp;
209	Opt.cToSearch = iBp - Opt.iStartSearch + 1;
210	}
211
212	*pOpt = Opt;
213	return VINF_SUCCESS;
214	}
215
216
217	/**
218	* Get a breakpoint give by breakpoint id.
219	*
220	* @returns Pointer to the allocated breakpoint.
221	* @returns NULL if the breakpoint is invalid.
222	* @param pVM The cross context VM structure.
223	* @param iBp The breakpoint id.
224	*/
225	static PDBGFBP dbgfR3BpGet(PVM pVM, uint32_t iBp)
226	{
227	/* Find it. */
228	PDBGFBP pBp;
229	if (iBp < RT_ELEMENTS(pVM->dbgf.s.aHwBreakpoints))
230	pBp = &pVM->dbgf.s.aHwBreakpoints[iBp];
231	else
232	{
233	iBp -= RT_ELEMENTS(pVM->dbgf.s.aHwBreakpoints);
234	if (iBp >= RT_ELEMENTS(pVM->dbgf.s.aBreakpoints))
235	return NULL;
236	pBp = &pVM->dbgf.s.aBreakpoints[iBp];
237	}
238
239	/* check if it's valid. */
240	switch (pBp->enmType)
241	{
242	case DBGFBPTYPE_FREE:
243	return NULL;
244
245	case DBGFBPTYPE_REG:
246	case DBGFBPTYPE_INT3:
247	case DBGFBPTYPE_REM:
248	case DBGFBPTYPE_PORT_IO:
249	case DBGFBPTYPE_MMIO:
250	break;
251
252	default:
253	AssertMsgFailed(("Invalid enmType=%d!\n", pBp->enmType));
254	return NULL;
255	}
256
257	return pBp;
258	}
259
260
261	/**
262	* Get a breakpoint give by address.
263	*
264	* @returns Pointer to the allocated breakpoint.
265	* @returns NULL if the breakpoint is invalid.
266	* @param pVM The cross context VM structure.
267	* @param enmType The breakpoint type.
268	* @param GCPtr The breakpoint address.
269	*/
270	static PDBGFBP dbgfR3BpGetByAddr(PVM pVM, DBGFBPTYPE enmType, RTGCUINTPTR GCPtr)
271	{
272	/*
273	* Determine which array to search.
274	*/
275	unsigned cBps;
276	PDBGFBP paBps;
277	switch (enmType)
278	{
279	case DBGFBPTYPE_REG:
280	cBps = RT_ELEMENTS(pVM->dbgf.s.aHwBreakpoints);
281	paBps = &pVM->dbgf.s.aHwBreakpoints[0];
282	break;
283
284	case DBGFBPTYPE_INT3:
285	case DBGFBPTYPE_REM:
286	cBps = RT_ELEMENTS(pVM->dbgf.s.aBreakpoints);
287	paBps = &pVM->dbgf.s.aBreakpoints[0];
288	break;
289
290	default:
291	AssertMsgFailed(("enmType=%d\n", enmType));
292	return NULL;
293	}
294
295	/*
296	* Search.
297	*/
298	for (unsigned iBp = 0; iBp < cBps; iBp++)
299	if ( paBps[iBp].enmType == enmType
300	&& paBps[iBp].u.GCPtr == GCPtr)
301	return &paBps[iBp];
302
303	return NULL;
304	}
305
306
307	/**
308	* Frees a breakpoint.
309	*
310	* @param pVM The cross context VM structure.
311	* @param pBp The breakpoint to free.
312	*/
313	static void dbgfR3BpFree(PVM pVM, PDBGFBP pBp)
314	{
315	switch (pBp->enmType)
316	{
317	case DBGFBPTYPE_FREE:
318	AssertMsgFailed(("Already freed!\n"));
319	return;
320
321	case DBGFBPTYPE_REG:
322	Assert((uintptr_t)(pBp - &pVM->dbgf.s.aHwBreakpoints[0]) < RT_ELEMENTS(pVM->dbgf.s.aHwBreakpoints));
323	break;
324
325	case DBGFBPTYPE_INT3:
326	case DBGFBPTYPE_REM:
327	case DBGFBPTYPE_PORT_IO:
328	case DBGFBPTYPE_MMIO:
329	Assert((uintptr_t)(pBp - &pVM->dbgf.s.aBreakpoints[0]) < RT_ELEMENTS(pVM->dbgf.s.aBreakpoints));
330	break;
331
332	default:
333	AssertMsgFailed(("Invalid enmType=%d!\n", pBp->enmType));
334	return;
335
336	}
337	pBp->enmType = DBGFBPTYPE_FREE;
338	NOREF(pVM);
339	}
340
341
342	/**
343	* @callback_method_impl{FNVMMEMTRENDEZVOUS}
344	*/
345	static DECLCALLBACK(VBOXSTRICTRC) dbgfR3BpEnableInt3OnCpu(PVM pVM, PVMCPU pVCpu, void *pvUser)
346	{
347	/*
348	* Validate input.
349	*/
350	PDBGFBP pBp = (PDBGFBP)pvUser;
351	AssertReturn(pBp, VERR_INVALID_PARAMETER);
352	Assert(pBp->enmType == DBGFBPTYPE_INT3);
353	VMCPU_ASSERT_EMT(pVCpu); RT_NOREF(pVCpu);
354	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
355
356	/*
357	* Arm the breakpoint.
358	*/
359	return dbgfR3BpInt3Arm(pVM, pBp);
360	}
361
362
363	/**
364	* @callback_method_impl{FNVMMEMTRENDEZVOUS}
365	*/
366	static DECLCALLBACK(VBOXSTRICTRC) dbgfR3BpSetInt3OnCpu(PVM pVM, PVMCPU pVCpu, void *pvUser)
367	{
368	/*
369	* Validate input.
370	*/
371	PDBGFBPINT3ARGS pBpArgs = (PDBGFBPINT3ARGS)pvUser;
372	AssertReturn(pBpArgs, VERR_INVALID_PARAMETER);
373	VMCPU_ASSERT_EMT(pVCpu);
374	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
375
376	AssertMsgReturn(!pBpArgs->piBp \|\| VALID_PTR(pBpArgs->piBp), ("piBp=%p\n", pBpArgs->piBp), VERR_INVALID_POINTER);
377	PCDBGFADDRESS pAddress = pBpArgs->pAddress;
378	if (!DBGFR3AddrIsValid(pVM->pUVM, pAddress))
379	return VERR_INVALID_PARAMETER;
380
381	if (pBpArgs->iHitTrigger > pBpArgs->iHitDisable)
382	return VERR_INVALID_PARAMETER;
383
384	/*
385	* Check if we're on the source CPU where we can resolve the breakpoint address.
386	*/
387	if (pVCpu->idCpu == pBpArgs->idSrcCpu)
388	{
389	if (pBpArgs->piBp)
390	*pBpArgs->piBp = UINT32_MAX;
391
392	/*
393	* Check if the breakpoint already exists.
394	*/
395	PDBGFBP pBp = dbgfR3BpGetByAddr(pVM, DBGFBPTYPE_INT3, pAddress->FlatPtr);
396	if (pBp)
397	{
398	int rc = VINF_SUCCESS;
399	if (!pBp->fEnabled)
400	rc = dbgfR3BpInt3Arm(pVM, pBp);
401	if (RT_SUCCESS(rc))
402	{
403	if (pBpArgs->piBp)
404	*pBpArgs->piBp = pBp->iBp;
405
406	/*
407	* Returning VINF_DBGF_BP_ALREADY_EXIST here causes a VBOXSTRICTRC out-of-range assertion
408	* in VMMR3EmtRendezvous(). Re-setting of an existing breakpoint shouldn't cause an assertion
409	* killing the VM (and debugging session), so for now we'll pretend success.
410	*/
411	#if 0
412	rc = VINF_DBGF_BP_ALREADY_EXIST;
413	#endif
414	}
415	else
416	dbgfR3BpFree(pVM, pBp);
417	return rc;
418	}
419
420	/*
421	* Allocate the breakpoint.
422	*/
423	pBp = dbgfR3BpAlloc(pVM, DBGFBPTYPE_INT3);
424	if (!pBp)
425	return VERR_DBGF_NO_MORE_BP_SLOTS;
426
427	/*
428	* Translate & save the breakpoint address into a guest-physical address.
429	*/
430	int rc = DBGFR3AddrToPhys(pVM->pUVM, pBpArgs->idSrcCpu, pAddress, &pBp->u.Int3.PhysAddr);
431	if (RT_SUCCESS(rc))
432	{
433	/* The physical address from DBGFR3AddrToPhys() is the start of the page,
434	we need the exact byte offset into the page while writing to it in dbgfR3BpInt3Arm(). */
435	pBp->u.Int3.PhysAddr \|= (pAddress->FlatPtr & X86_PAGE_OFFSET_MASK);
436	pBp->u.Int3.GCPtr = pAddress->FlatPtr;
437	pBp->iHitTrigger = pBpArgs->iHitTrigger;
438	pBp->iHitDisable = pBpArgs->iHitDisable;
439
440	/*
441	* Now set the breakpoint in guest memory.
442	*/
443	rc = dbgfR3BpInt3Arm(pVM, pBp);
444	if (RT_SUCCESS(rc))
445	{
446	if (pBpArgs->piBp)
447	*pBpArgs->piBp = pBp->iBp;
448	return VINF_SUCCESS;
449	}
450	}
451
452	dbgfR3BpFree(pVM, pBp);
453	return rc;
454	}
455
456	return VINF_SUCCESS;
457	}
458
459
460	/**
461	* Sets a breakpoint (int 3 based).
462	*
463	* @returns VBox status code.
464	* @param pUVM The user mode VM handle.
465	* @param idSrcCpu The ID of the virtual CPU used for the
466	* breakpoint address resolution.
467	* @param pAddress The address of the breakpoint.
468	* @param iHitTrigger The hit count at which the breakpoint start triggering.
469	* Use 0 (or 1) if it's gonna trigger at once.
470	* @param iHitDisable The hit count which disables the breakpoint.
471	* Use ~(uint64_t) if it's never gonna be disabled.
472	* @param piBp Where to store the breakpoint id. (optional)
473	* @thread Any thread.
474	*/
475	VMMR3DECL(int) DBGFR3BpSetInt3(PUVM pUVM, VMCPUID idSrcCpu, PCDBGFADDRESS pAddress, uint64_t iHitTrigger, uint64_t iHitDisable,
476	uint32_t *piBp)
477	{
478	AssertReturn(idSrcCpu <= pUVM->cCpus, VERR_INVALID_CPU_ID);
479
480	DBGFBPINT3ARGS BpArgs;
481	RT_ZERO(BpArgs);
482	BpArgs.idSrcCpu = idSrcCpu;
483	BpArgs.iHitTrigger = iHitTrigger;
484	BpArgs.iHitDisable = iHitDisable;
485	BpArgs.pAddress = pAddress;
486	BpArgs.piBp = piBp;
487
488	int rc = VMMR3EmtRendezvous(pUVM->pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ALL_AT_ONCE, dbgfR3BpSetInt3OnCpu, &BpArgs);
489	LogFlow(("DBGFR3BpSet: returns %Rrc\n", rc));
490	return rc;
491	}
492
493
494	/**
495	* Arms an int 3 breakpoint.
496	*
497	* This is used to implement both DBGFR3BpSetInt3() and
498	* DBGFR3BpEnable().
499	*
500	* @returns VBox status code.
501	* @param pVM The cross context VM structure.
502	* @param pBp The breakpoint.
503	*/
504	static int dbgfR3BpInt3Arm(PVM pVM, PDBGFBP pBp)
505	{
506	VM_ASSERT_EMT(pVM);
507
508	/*
509	* Save current byte and write the int3 instruction byte.
510	*/
511	int rc = PGMPhysSimpleReadGCPhys(pVM, &pBp->u.Int3.bOrg, pBp->u.Int3.PhysAddr, sizeof(pBp->u.Int3.bOrg));
512	if (RT_SUCCESS(rc))
513	{
514	static const uint8_t s_bInt3 = 0xcc;
515	rc = PGMPhysSimpleWriteGCPhys(pVM, pBp->u.Int3.PhysAddr, &s_bInt3, sizeof(s_bInt3));
516	if (RT_SUCCESS(rc))
517	{
518	pBp->fEnabled = true;
519	dbgfR3BpUpdateSearchOptimizations(pVM, DBGFBPTYPE_INT3, &pVM->dbgf.s.Int3);
520	pVM->dbgf.s.cEnabledInt3Breakpoints = pVM->dbgf.s.Int3.cToSearch;
521	Log(("DBGF: Set breakpoint at %RGv (Phys %RGp) cEnabledInt3Breakpoints=%u\n", pBp->u.Int3.GCPtr,
522	pBp->u.Int3.PhysAddr, pVM->dbgf.s.cEnabledInt3Breakpoints));
523	}
524	}
525	return rc;
526	}
527
528
529	/**
530	* Disarms an int 3 breakpoint.
531	*
532	* This is used to implement both DBGFR3BpClear() and DBGFR3BpDisable().
533	*
534	* @returns VBox status code.
535	* @param pVM The cross context VM structure.
536	* @param pBp The breakpoint.
537	*/
538	static int dbgfR3BpInt3Disarm(PVM pVM, PDBGFBP pBp)
539	{
540	VM_ASSERT_EMT(pVM);
541
542	/*
543	* Check that the current byte is the int3 instruction, and restore the original one.
544	* We currently ignore invalid bytes.
545	*/
546	uint8_t bCurrent = 0;
547	int rc = PGMPhysSimpleReadGCPhys(pVM, &bCurrent, pBp->u.Int3.PhysAddr, sizeof(bCurrent));
548	if ( RT_SUCCESS(rc)
549	&& bCurrent == 0xcc)
550	{
551	rc = PGMPhysSimpleWriteGCPhys(pVM, pBp->u.Int3.PhysAddr, &pBp->u.Int3.bOrg, sizeof(pBp->u.Int3.bOrg));
552	if (RT_SUCCESS(rc))
553	{
554	pBp->fEnabled = false;
555	dbgfR3BpUpdateSearchOptimizations(pVM, DBGFBPTYPE_INT3, &pVM->dbgf.s.Int3);
556	pVM->dbgf.s.cEnabledInt3Breakpoints = pVM->dbgf.s.Int3.cToSearch;
557	Log(("DBGF: Removed breakpoint at %RGv (Phys %RGp) cEnabledInt3Breakpoints=%u\n", pBp->u.Int3.GCPtr,
558	pBp->u.Int3.PhysAddr, pVM->dbgf.s.cEnabledInt3Breakpoints));
559	}
560	}
561	return rc;
562	}
563
564
565	/**
566	* @callback_method_impl{FNVMMEMTRENDEZVOUS}
567	*/
568	static DECLCALLBACK(VBOXSTRICTRC) dbgfR3BpDisableInt3OnCpu(PVM pVM, PVMCPU pVCpu, void *pvUser)
569	{
570	/*
571	* Validate input.
572	*/
573	PDBGFBP pBp = (PDBGFBP)pvUser;
574	AssertReturn(pBp, VERR_INVALID_PARAMETER);
575	Assert(pBp->enmType == DBGFBPTYPE_INT3);
576	VMCPU_ASSERT_EMT(pVCpu); RT_NOREF(pVCpu);
577	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
578
579	/*
580	* Disarm the breakpoint.
581	*/
582	return dbgfR3BpInt3Disarm(pVM, pBp);
583	}
584
585
586	/**
587	* Sets a register breakpoint.
588	*
589	* @returns VBox status code.
590	* @param pUVM The user mode VM handle.
591	* @param pAddress The address of the breakpoint.
592	* @param piHitTrigger The hit count at which the breakpoint start triggering.
593	* Use 0 (or 1) if it's gonna trigger at once.
594	* @param piHitDisable The hit count which disables the breakpoint.
595	* Use ~(uint64_t) if it's never gonna be disabled.
596	* @param fType The access type (one of the X86_DR7_RW_* defines).
597	* @param cb The access size - 1,2,4 or 8 (the latter is AMD64 long mode only.
598	* Must be 1 if fType is X86_DR7_RW_EO.
599	* @param piBp Where to store the breakpoint id. (optional)
600	* @thread EMT
601	* @internal
602	*/
603	static DECLCALLBACK(int) dbgfR3BpSetReg(PUVM pUVM, PCDBGFADDRESS pAddress, uint64_t piHitTrigger, uint64_t piHitDisable,
604	uint8_t fType, uint8_t cb, uint32_t *piBp)
605	{
606	/*
607	* Validate input.
608	*/
609	PVM pVM = pUVM->pVM;
610	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
611	if (!DBGFR3AddrIsValid(pUVM, pAddress))
612	return VERR_INVALID_PARAMETER;
613	if (piHitTrigger > piHitDisable)
614	return VERR_INVALID_PARAMETER;
615	AssertMsgReturn(!piBp \|\| VALID_PTR(piBp), ("piBp=%p\n", piBp), VERR_INVALID_POINTER);
616	if (piBp)
617	*piBp = UINT32_MAX;
618	switch (fType)
619	{
620	case X86_DR7_RW_EO:
621	if (cb == 1)
622	break;
623	AssertMsgFailed(("fType=%#x cb=%d != 1\n", fType, cb));
624	return VERR_INVALID_PARAMETER;
625	case X86_DR7_RW_IO:
626	case X86_DR7_RW_RW:
627	case X86_DR7_RW_WO:
628	break;
629	default:
630	AssertMsgFailed(("fType=%#x\n", fType));
631	return VERR_INVALID_PARAMETER;
632	}
633	switch (cb)
634	{
635	case 1:
636	case 2:
637	case 4:
638	break;
639	default:
640	AssertMsgFailed(("cb=%#x\n", cb));
641	return VERR_INVALID_PARAMETER;
642	}
643
644	/*
645	* Check if the breakpoint already exists.
646	*/
647	PDBGFBP pBp = dbgfR3BpGetByAddr(pVM, DBGFBPTYPE_REG, pAddress->FlatPtr);
648	if ( pBp
649	&& pBp->u.Reg.cb == cb
650	&& pBp->u.Reg.fType == fType)
651	{
652	int rc = VINF_SUCCESS;
653	if (!pBp->fEnabled)
654	rc = dbgfR3BpRegArm(pVM, pBp);
655	if (RT_SUCCESS(rc))
656	{
657	rc = VINF_DBGF_BP_ALREADY_EXIST;
658	if (piBp)
659	*piBp = pBp->iBp;
660	}
661	return rc;
662	}
663
664	/*
665	* Allocate and initialize the bp.
666	*/
667	pBp = dbgfR3BpAlloc(pVM, DBGFBPTYPE_REG);
668	if (!pBp)
669	return VERR_DBGF_NO_MORE_BP_SLOTS;
670	pBp->iHitTrigger = *piHitTrigger;
671	pBp->iHitDisable = *piHitDisable;
672	Assert(pBp->iBp == pBp->u.Reg.iReg);
673	pBp->u.Reg.GCPtr = pAddress->FlatPtr;
674	pBp->u.Reg.fType = fType;
675	pBp->u.Reg.cb = cb;
676	ASMCompilerBarrier();
677	pBp->fEnabled = true;
678
679	/*
680	* Arm the breakpoint.
681	*/
682	int rc = dbgfR3BpRegArm(pVM, pBp);
683	if (RT_SUCCESS(rc))
684	{
685	if (piBp)
686	*piBp = pBp->iBp;
687	}
688	else
689	dbgfR3BpFree(pVM, pBp);
690
691	return rc;
692	}
693
694
695	/**
696	* Sets a register breakpoint.
697	*
698	* @returns VBox status code.
699	* @param pUVM The user mode VM handle.
700	* @param pAddress The address of the breakpoint.
701	* @param iHitTrigger The hit count at which the breakpoint start triggering.
702	* Use 0 (or 1) if it's gonna trigger at once.
703	* @param iHitDisable The hit count which disables the breakpoint.
704	* Use ~(uint64_t) if it's never gonna be disabled.
705	* @param fType The access type (one of the X86_DR7_RW_* defines).
706	* @param cb The access size - 1,2,4 or 8 (the latter is AMD64 long mode only.
707	* Must be 1 if fType is X86_DR7_RW_EO.
708	* @param piBp Where to store the breakpoint id. (optional)
709	* @thread Any thread.
710	*/
711	VMMR3DECL(int) DBGFR3BpSetReg(PUVM pUVM, PCDBGFADDRESS pAddress, uint64_t iHitTrigger, uint64_t iHitDisable,
712	uint8_t fType, uint8_t cb, uint32_t *piBp)
713	{
714	/*
715	* This must be done on EMT.
716	*/
717	int rc = VMR3ReqCallWaitU(pUVM, 0 /idDstCpu/, (PFNRT)dbgfR3BpSetReg, 7,
718	pUVM, pAddress, &iHitTrigger, &iHitDisable, fType, cb, piBp);
719	LogFlow(("DBGFR3BpSetReg: returns %Rrc\n", rc));
720	return rc;
721
722	}
723
724
725	/**
726	* @callback_method_impl{FNVMMEMTRENDEZVOUS}
727	*/
728	static DECLCALLBACK(VBOXSTRICTRC) dbgfR3BpRegRecalcOnCpu(PVM pVM, PVMCPU pVCpu, void *pvUser)
729	{
730	NOREF(pVM); NOREF(pvUser);
731
732	/*
733	* CPU 0 updates the enabled hardware breakpoint counts.
734	*/
735	if (pVCpu->idCpu == 0)
736	{
737	pVM->dbgf.s.cEnabledHwBreakpoints = 0;
738	pVM->dbgf.s.cEnabledHwIoBreakpoints = 0;
739
740	for (uint32_t iBp = 0; iBp < RT_ELEMENTS(pVM->dbgf.s.aHwBreakpoints); iBp++)
741	if ( pVM->dbgf.s.aHwBreakpoints[iBp].fEnabled
742	&& pVM->dbgf.s.aHwBreakpoints[iBp].enmType == DBGFBPTYPE_REG)
743	{
744	pVM->dbgf.s.cEnabledHwBreakpoints += 1;
745	pVM->dbgf.s.cEnabledHwIoBreakpoints += pVM->dbgf.s.aHwBreakpoints[iBp].u.Reg.fType == X86_DR7_RW_IO;
746	}
747	}
748
749	return CPUMRecalcHyperDRx(pVCpu, UINT8_MAX, false);
750	}
751
752
753	/**
754	* Arms a debug register breakpoint.
755	*
756	* This is used to implement both DBGFR3BpSetReg() and DBGFR3BpEnable().
757	*
758	* @returns VBox status code.
759	* @param pVM The cross context VM structure.
760	* @param pBp The breakpoint.
761	* @thread EMT(0)
762	*/
763	static int dbgfR3BpRegArm(PVM pVM, PDBGFBP pBp)
764	{
765	RT_NOREF_PV(pBp);
766	Assert(pBp->fEnabled);
767	return VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ALL_AT_ONCE, dbgfR3BpRegRecalcOnCpu, NULL);
768	}
769
770
771	/**
772	* Disarms a debug register breakpoint.
773	*
774	* This is used to implement both DBGFR3BpClear() and DBGFR3BpDisable().
775	*
776	* @returns VBox status code.
777	* @param pVM The cross context VM structure.
778	* @param pBp The breakpoint.
779	* @thread EMT(0)
780	*/
781	static int dbgfR3BpRegDisarm(PVM pVM, PDBGFBP pBp)
782	{
783	RT_NOREF_PV(pBp);
784	Assert(!pBp->fEnabled);
785	return VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ALL_AT_ONCE, dbgfR3BpRegRecalcOnCpu, NULL);
786	}
787
788
789	/**
790	* EMT worker for DBGFR3BpSetREM().
791	*
792	* @returns VBox status code.
793	* @param pUVM The user mode VM handle.
794	* @param pAddress The address of the breakpoint.
795	* @param piHitTrigger The hit count at which the breakpoint start triggering.
796	* Use 0 (or 1) if it's gonna trigger at once.
797	* @param piHitDisable The hit count which disables the breakpoint.
798	* Use ~(uint64_t) if it's never gonna be disabled.
799	* @param piBp Where to store the breakpoint id. (optional)
800	* @thread EMT(0)
801	* @internal
802	*/
803	static DECLCALLBACK(int) dbgfR3BpSetREM(PUVM pUVM, PCDBGFADDRESS pAddress, uint64_t *piHitTrigger,
804	uint64_t piHitDisable, uint32_t piBp)
805	{
806	/*
807	* Validate input.
808	*/
809	PVM pVM = pUVM->pVM;
810	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
811	if (!DBGFR3AddrIsValid(pUVM, pAddress))
812	return VERR_INVALID_PARAMETER;
813	if (piHitTrigger > piHitDisable)
814	return VERR_INVALID_PARAMETER;
815	AssertMsgReturn(!piBp \|\| VALID_PTR(piBp), ("piBp=%p\n", piBp), VERR_INVALID_POINTER);
816	if (piBp)
817	*piBp = UINT32_MAX;
818
819	/*
820	* Check if the breakpoint already exists.
821	*/
822	PDBGFBP pBp = dbgfR3BpGetByAddr(pVM, DBGFBPTYPE_REM, pAddress->FlatPtr);
823	if (pBp)
824	{
825	int rc = VINF_SUCCESS;
826	if (!pBp->fEnabled)
827	#ifdef VBOX_WITH_REM
828	rc = REMR3BreakpointSet(pVM, pBp->u.Rem.GCPtr);
829	#else
830	rc = IEMBreakpointSet(pVM, pBp->u.Rem.GCPtr);
831	#endif
832	if (RT_SUCCESS(rc))
833	{
834	rc = VINF_DBGF_BP_ALREADY_EXIST;
835	if (piBp)
836	*piBp = pBp->iBp;
837	}
838	return rc;
839	}
840
841	/*
842	* Allocate and initialize the bp.
843	*/
844	pBp = dbgfR3BpAlloc(pVM, DBGFBPTYPE_REM);
845	if (!pBp)
846	return VERR_DBGF_NO_MORE_BP_SLOTS;
847	pBp->u.Rem.GCPtr = pAddress->FlatPtr;
848	pBp->iHitTrigger = *piHitTrigger;
849	pBp->iHitDisable = *piHitDisable;
850	ASMCompilerBarrier();
851	pBp->fEnabled = true;
852
853	/*
854	* Now ask REM to set the breakpoint.
855	*/
856	#ifdef VBOX_WITH_REM
857	int rc = REMR3BreakpointSet(pVM, pAddress->FlatPtr);
858	#else
859	int rc = IEMBreakpointSet(pVM, pAddress->FlatPtr);
860	#endif
861	if (RT_SUCCESS(rc))
862	{
863	if (piBp)
864	*piBp = pBp->iBp;
865	}
866	else
867	dbgfR3BpFree(pVM, pBp);
868
869	return rc;
870	}
871
872
873	/**
874	* Sets a recompiler breakpoint.
875	*
876	* @returns VBox status code.
877	* @param pUVM The user mode VM handle.
878	* @param pAddress The address of the breakpoint.
879	* @param iHitTrigger The hit count at which the breakpoint start triggering.
880	* Use 0 (or 1) if it's gonna trigger at once.
881	* @param iHitDisable The hit count which disables the breakpoint.
882	* Use ~(uint64_t) if it's never gonna be disabled.
883	* @param piBp Where to store the breakpoint id. (optional)
884	* @thread Any thread.
885	*/
886	VMMR3DECL(int) DBGFR3BpSetREM(PUVM pUVM, PCDBGFADDRESS pAddress, uint64_t iHitTrigger, uint64_t iHitDisable, uint32_t *piBp)
887	{
888	/*
889	* This must be done on EMT.
890	*/
891	int rc = VMR3ReqCallWaitU(pUVM, 0 /idDstCpu/, (PFNRT)dbgfR3BpSetREM, 5,
892	pUVM, pAddress, &iHitTrigger, &iHitDisable, piBp);
893	LogFlow(("DBGFR3BpSetREM: returns %Rrc\n", rc));
894	return rc;
895	}
896
897
898	/**
899	* Updates IOM on whether we've got any armed I/O port or MMIO breakpoints.
900	*
901	* @returns VINF_SUCCESS
902	* @param pVM The cross context VM structure.
903	* @thread EMT(0)
904	*/
905	static int dbgfR3BpUpdateIom(PVM pVM)
906	{
907	dbgfR3BpUpdateSearchOptimizations(pVM, DBGFBPTYPE_PORT_IO, &pVM->dbgf.s.PortIo);
908	if (pVM->dbgf.s.PortIo.cToSearch)
909	ASMAtomicBitSet(&pVM->dbgf.s.bmSelectedEvents, DBGFEVENT_BREAKPOINT_IO);
910	else
911	ASMAtomicBitClear(&pVM->dbgf.s.bmSelectedEvents, DBGFEVENT_BREAKPOINT_IO);
912
913	dbgfR3BpUpdateSearchOptimizations(pVM, DBGFBPTYPE_MMIO, &pVM->dbgf.s.Mmio);
914	if (pVM->dbgf.s.Mmio.cToSearch)
915	ASMAtomicBitSet(&pVM->dbgf.s.bmSelectedEvents, DBGFEVENT_BREAKPOINT_MMIO);
916	else
917	ASMAtomicBitClear(&pVM->dbgf.s.bmSelectedEvents, DBGFEVENT_BREAKPOINT_MMIO);
918
919	IOMR3NotifyBreakpointCountChange(pVM, pVM->dbgf.s.PortIo.cToSearch != 0, pVM->dbgf.s.Mmio.cToSearch != 0);
920	return VINF_SUCCESS;
921	}
922
923
924	/**
925	* EMT worker for DBGFR3BpSetPortIo.
926	*
927	* @returns VBox status code.
928	* @param pUVM The user mode VM handle.
929	* @param uPort The first I/O port.
930	* @param cPorts The number of I/O ports.
931	* @param fAccess The access we want to break on.
932	* @param piHitTrigger The hit count at which the breakpoint start triggering.
933	* Use 0 (or 1) if it's gonna trigger at once.
934	* @param piHitDisable The hit count which disables the breakpoint.
935	* Use ~(uint64_t) if it's never gonna be disabled.
936	* @param piBp Where to store the breakpoint ID.
937	* @thread EMT(0)
938	*/
939	static DECLCALLBACK(int) dbgfR3BpSetPortIo(PUVM pUVM, RTIOPORT uPort, RTIOPORT cPorts, uint32_t fAccess,
940	uint64_t const piHitTrigger, uint64_t const piHitDisable, uint32_t *piBp)
941	{
942	/*
943	* Validate input.
944	*/
945	PVM pVM = pUVM->pVM;
946	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
947	*piBp = UINT32_MAX;
948
949	/*
950	* Check if the breakpoint already exists.
951	*/
952	for (uint32_t i = 0; i < RT_ELEMENTS(pVM->dbgf.s.aBreakpoints); i++)
953	if ( pVM->dbgf.s.aBreakpoints[i].enmType == DBGFBPTYPE_PORT_IO
954	&& pVM->dbgf.s.aBreakpoints[i].u.PortIo.uPort == uPort
955	&& pVM->dbgf.s.aBreakpoints[i].u.PortIo.cPorts == cPorts
956	&& pVM->dbgf.s.aBreakpoints[i].u.PortIo.fAccess == fAccess)
957	{
958	if (!pVM->dbgf.s.aBreakpoints[i].fEnabled)
959	{
960	pVM->dbgf.s.aBreakpoints[i].fEnabled = true;
961	dbgfR3BpUpdateIom(pVM);
962	}
963	*piBp = pVM->dbgf.s.aBreakpoints[i].iBp;
964	return VINF_DBGF_BP_ALREADY_EXIST;
965	}
966
967	/*
968	* Allocate and initialize the breakpoint.
969	*/
970	PDBGFBP pBp = dbgfR3BpAlloc(pVM, DBGFBPTYPE_PORT_IO);
971	if (!pBp)
972	return VERR_DBGF_NO_MORE_BP_SLOTS;
973	pBp->iHitTrigger = *piHitTrigger;
974	pBp->iHitDisable = *piHitDisable;
975	pBp->u.PortIo.uPort = uPort;
976	pBp->u.PortIo.cPorts = cPorts;
977	pBp->u.PortIo.fAccess = fAccess;
978	ASMCompilerBarrier();
979	pBp->fEnabled = true;
980
981	/*
982	* Tell IOM.
983	*/
984	dbgfR3BpUpdateIom(pVM);
985	*piBp = pBp->iBp;
986	return VINF_SUCCESS;
987	}
988
989
990	/**
991	* Sets an I/O port breakpoint.
992	*
993	* @returns VBox status code.
994	* @param pUVM The user mode VM handle.
995	* @param uPort The first I/O port.
996	* @param cPorts The number of I/O ports, see DBGFBPIOACCESS_XXX.
997	* @param fAccess The access we want to break on.
998	* @param iHitTrigger The hit count at which the breakpoint start
999	* triggering. Use 0 (or 1) if it's gonna trigger at
1000	* once.
1001	* @param iHitDisable The hit count which disables the breakpoint.
1002	* Use ~(uint64_t) if it's never gonna be disabled.
1003	* @param piBp Where to store the breakpoint ID. Optional.
1004	* @thread Any thread.
1005	*/
1006	VMMR3DECL(int) DBGFR3BpSetPortIo(PUVM pUVM, RTIOPORT uPort, RTIOPORT cPorts, uint32_t fAccess,
1007	uint64_t iHitTrigger, uint64_t iHitDisable, uint32_t *piBp)
1008	{
1009	AssertReturn(!(fAccess & ~DBGFBPIOACCESS_VALID_MASK_PORT_IO), VERR_INVALID_FLAGS);
1010	AssertReturn(fAccess, VERR_INVALID_FLAGS);
1011	if (iHitTrigger > iHitDisable)
1012	return VERR_INVALID_PARAMETER;
1013	AssertPtrNullReturn(piBp, VERR_INVALID_POINTER);
1014	AssertReturn(cPorts > 0, VERR_OUT_OF_RANGE);
1015	AssertReturn((RTIOPORT)(uPort + cPorts) < uPort, VERR_OUT_OF_RANGE);
1016
1017	/*
1018	* This must be done on EMT.
1019	*/
1020	uint32_t iBp = UINT32_MAX;
1021	int rc = VMR3ReqCallWaitU(pUVM, 0 /idDstCpu/, (PFNRT)dbgfR3BpSetPortIo, 7,
1022	pUVM, uPort, cPorts, fAccess, &iHitTrigger, &iHitDisable, piBp);
1023	if (piBp)
1024	*piBp = iBp;
1025	LogFlow(("DBGFR3BpSetPortIo: returns %Rrc iBp=%d\n", rc, iBp));
1026	return rc;
1027	}
1028
1029
1030	/**
1031	* EMT worker for DBGFR3BpSetMmio.
1032	*
1033	* @returns VBox status code.
1034	* @param pUVM The user mode VM handle.
1035	* @param pGCPhys The start of the MMIO range to break on.
1036	* @param cb The size of the MMIO range.
1037	* @param fAccess The access we want to break on.
1038	* @param piHitTrigger The hit count at which the breakpoint start triggering.
1039	* Use 0 (or 1) if it's gonna trigger at once.
1040	* @param piHitDisable The hit count which disables the breakpoint.
1041	* Use ~(uint64_t) if it's never gonna be disabled.
1042	* @param piBp Where to store the breakpoint ID.
1043	* @thread EMT(0)
1044	*/
1045	static DECLCALLBACK(int) dbgfR3BpSetMmio(PUVM pUVM, PCRTGCPHYS pGCPhys, uint32_t cb, uint32_t fAccess,
1046	uint64_t const piHitTrigger, uint64_t const piHitDisable, uint32_t *piBp)
1047	{
1048	RTGCPHYS const GCPhys = *pGCPhys;
1049
1050	/*
1051	* Validate input.
1052	*/
1053	PVM pVM = pUVM->pVM;
1054	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1055	*piBp = UINT32_MAX;
1056
1057	/*
1058	* Check if the breakpoint already exists.
1059	*/
1060	for (uint32_t i = 0; i < RT_ELEMENTS(pVM->dbgf.s.aBreakpoints); i++)
1061	if ( pVM->dbgf.s.aBreakpoints[i].enmType == DBGFBPTYPE_MMIO
1062	&& pVM->dbgf.s.aBreakpoints[i].u.Mmio.PhysAddr == GCPhys
1063	&& pVM->dbgf.s.aBreakpoints[i].u.Mmio.cb == cb
1064	&& pVM->dbgf.s.aBreakpoints[i].u.Mmio.fAccess == fAccess)
1065	{
1066	if (!pVM->dbgf.s.aBreakpoints[i].fEnabled)
1067	{
1068	pVM->dbgf.s.aBreakpoints[i].fEnabled = true;
1069	dbgfR3BpUpdateIom(pVM);
1070	}
1071	*piBp = pVM->dbgf.s.aBreakpoints[i].iBp;
1072	return VINF_DBGF_BP_ALREADY_EXIST;
1073	}
1074
1075	/*
1076	* Allocate and initialize the breakpoint.
1077	*/
1078	PDBGFBP pBp = dbgfR3BpAlloc(pVM, DBGFBPTYPE_MMIO);
1079	if (!pBp)
1080	return VERR_DBGF_NO_MORE_BP_SLOTS;
1081	pBp->iHitTrigger = *piHitTrigger;
1082	pBp->iHitDisable = *piHitDisable;
1083	pBp->u.Mmio.PhysAddr = GCPhys;
1084	pBp->u.Mmio.cb = cb;
1085	pBp->u.Mmio.fAccess = fAccess;
1086	ASMCompilerBarrier();
1087	pBp->fEnabled = true;
1088
1089	/*
1090	* Tell IOM.
1091	*/
1092	dbgfR3BpUpdateIom(pVM);
1093	*piBp = pBp->iBp;
1094	return VINF_SUCCESS;
1095	}
1096
1097
1098	/**
1099	* Sets a memory mapped I/O breakpoint.
1100	*
1101	* @returns VBox status code.
1102	* @param pUVM The user mode VM handle.
1103	* @param GCPhys The first MMIO address.
1104	* @param cb The size of the MMIO range to break on.
1105	* @param fAccess The access we want to break on.
1106	* @param iHitTrigger The hit count at which the breakpoint start
1107	* triggering. Use 0 (or 1) if it's gonna trigger at
1108	* once.
1109	* @param iHitDisable The hit count which disables the breakpoint.
1110	* Use ~(uint64_t) if it's never gonna be disabled.
1111	* @param piBp Where to store the breakpoint ID. Optional.
1112	* @thread Any thread.
1113	*/
1114	VMMR3DECL(int) DBGFR3BpSetMmio(PUVM pUVM, RTGCPHYS GCPhys, uint32_t cb, uint32_t fAccess,
1115	uint64_t iHitTrigger, uint64_t iHitDisable, uint32_t *piBp)
1116	{
1117	AssertReturn(!(fAccess & ~DBGFBPIOACCESS_VALID_MASK_MMIO), VERR_INVALID_FLAGS);
1118	AssertReturn(fAccess, VERR_INVALID_FLAGS);
1119	if (iHitTrigger > iHitDisable)
1120	return VERR_INVALID_PARAMETER;
1121	AssertPtrNullReturn(piBp, VERR_INVALID_POINTER);
1122	AssertReturn(cb, VERR_OUT_OF_RANGE);
1123	AssertReturn(GCPhys + cb < GCPhys, VERR_OUT_OF_RANGE);
1124
1125	/*
1126	* This must be done on EMT.
1127	*/
1128	uint32_t iBp = UINT32_MAX;
1129	int rc = VMR3ReqCallWaitU(pUVM, 0 /idDstCpu/, (PFNRT)dbgfR3BpSetMmio, 7,
1130	pUVM, &GCPhys, cb, fAccess, &iHitTrigger, &iHitDisable, piBp);
1131	if (piBp)
1132	*piBp = iBp;
1133	LogFlow(("DBGFR3BpSetMmio: returns %Rrc iBp=%d\n", rc, iBp));
1134	return rc;
1135	}
1136
1137
1138	/**
1139	* EMT worker for DBGFR3BpClear().
1140	*
1141	* @returns VBox status code.
1142	* @param pUVM The user mode VM handle.
1143	* @param iBp The id of the breakpoint which should be removed (cleared).
1144	* @thread EMT(0)
1145	* @internal
1146	*/
1147	static DECLCALLBACK(int) dbgfR3BpClear(PUVM pUVM, uint32_t iBp)
1148	{
1149	/*
1150	* Validate input.
1151	*/
1152	PVM pVM = pUVM->pVM;
1153	VM_ASSERT_EMT(pVM);
1154	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1155	PDBGFBP pBp = dbgfR3BpGet(pVM, iBp);
1156	if (!pBp)
1157	return VERR_DBGF_BP_NOT_FOUND;
1158
1159	/*
1160	* Disarm the breakpoint if it's enabled.
1161	*/
1162	if (pBp->fEnabled)
1163	{
1164	pBp->fEnabled = false;
1165	int rc;
1166	switch (pBp->enmType)
1167	{
1168	case DBGFBPTYPE_REG:
1169	rc = dbgfR3BpRegDisarm(pVM, pBp);
1170	break;
1171
1172	case DBGFBPTYPE_INT3:
1173	rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE, dbgfR3BpDisableInt3OnCpu, pBp);
1174	break;
1175
1176	case DBGFBPTYPE_REM:
1177	#ifdef VBOX_WITH_REM
1178	rc = REMR3BreakpointClear(pVM, pBp->u.Rem.GCPtr);
1179	#else
1180	rc = IEMBreakpointClear(pVM, pBp->u.Rem.GCPtr);
1181	#endif
1182	break;
1183
1184	case DBGFBPTYPE_PORT_IO:
1185	case DBGFBPTYPE_MMIO:
1186	rc = dbgfR3BpUpdateIom(pVM);
1187	break;
1188
1189	default:
1190	AssertMsgFailedReturn(("Invalid enmType=%d!\n", pBp->enmType), VERR_IPE_NOT_REACHED_DEFAULT_CASE);
1191	}
1192	AssertRCReturn(rc, rc);
1193	}
1194
1195	/*
1196	* Free the breakpoint.
1197	*/
1198	dbgfR3BpFree(pVM, pBp);
1199	return VINF_SUCCESS;
1200	}
1201
1202
1203	/**
1204	* Clears a breakpoint.
1205	*
1206	* @returns VBox status code.
1207	* @param pUVM The user mode VM handle.
1208	* @param iBp The id of the breakpoint which should be removed (cleared).
1209	* @thread Any thread.
1210	*/
1211	VMMR3DECL(int) DBGFR3BpClear(PUVM pUVM, uint32_t iBp)
1212	{
1213	/*
1214	* This must be done on EMT.
1215	*/
1216	int rc = VMR3ReqCallWaitU(pUVM, 0 /idDstCpu/, (PFNRT)dbgfR3BpClear, 2, pUVM, iBp);
1217	LogFlow(("DBGFR3BpClear: returns %Rrc\n", rc));
1218	return rc;
1219	}
1220
1221
1222	/**
1223	* EMT worker for DBGFR3BpEnable().
1224	*
1225	* @returns VBox status code.
1226	* @param pUVM The user mode VM handle.
1227	* @param iBp The id of the breakpoint which should be enabled.
1228	* @thread EMT(0)
1229	* @internal
1230	*/
1231	static DECLCALLBACK(int) dbgfR3BpEnable(PUVM pUVM, uint32_t iBp)
1232	{
1233	/*
1234	* Validate input.
1235	*/
1236	PVM pVM = pUVM->pVM;
1237	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1238	PDBGFBP pBp = dbgfR3BpGet(pVM, iBp);
1239	if (!pBp)
1240	return VERR_DBGF_BP_NOT_FOUND;
1241
1242	/*
1243	* Already enabled?
1244	*/
1245	if (pBp->fEnabled)
1246	return VINF_DBGF_BP_ALREADY_ENABLED;
1247
1248	/*
1249	* Arm the breakpoint.
1250	*/
1251	int rc;
1252	pBp->fEnabled = true;
1253	switch (pBp->enmType)
1254	{
1255	case DBGFBPTYPE_REG:
1256	rc = dbgfR3BpRegArm(pVM, pBp);
1257	break;
1258
1259	case DBGFBPTYPE_INT3:
1260	rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE, dbgfR3BpEnableInt3OnCpu, pBp);
1261	break;
1262
1263	case DBGFBPTYPE_REM:
1264	#ifdef VBOX_WITH_REM
1265	rc = REMR3BreakpointSet(pVM, pBp->u.Rem.GCPtr);
1266	#else
1267	rc = IEMBreakpointSet(pVM, pBp->u.Rem.GCPtr);
1268	#endif
1269	break;
1270
1271	case DBGFBPTYPE_PORT_IO:
1272	case DBGFBPTYPE_MMIO:
1273	rc = dbgfR3BpUpdateIom(pVM);
1274	break;
1275
1276	default:
1277	AssertMsgFailedReturn(("Invalid enmType=%d!\n", pBp->enmType), VERR_IPE_NOT_REACHED_DEFAULT_CASE);
1278	}
1279	if (RT_FAILURE(rc))
1280	pBp->fEnabled = false;
1281
1282	return rc;
1283	}
1284
1285
1286	/**
1287	* Enables a breakpoint.
1288	*
1289	* @returns VBox status code.
1290	* @param pUVM The user mode VM handle.
1291	* @param iBp The id of the breakpoint which should be enabled.
1292	* @thread Any thread.
1293	*/
1294	VMMR3DECL(int) DBGFR3BpEnable(PUVM pUVM, uint32_t iBp)
1295	{
1296	/*
1297	* This must be done on EMT.
1298	*/
1299	int rc = VMR3ReqCallWaitU(pUVM, 0 /idDstCpu/, (PFNRT)dbgfR3BpEnable, 2, pUVM, iBp);
1300	LogFlow(("DBGFR3BpEnable: returns %Rrc\n", rc));
1301	return rc;
1302	}
1303
1304
1305	/**
1306	* EMT worker for DBGFR3BpDisable().
1307	*
1308	* @returns VBox status code.
1309	* @param pUVM The user mode VM handle.
1310	* @param iBp The id of the breakpoint which should be disabled.
1311	* @thread EMT(0)
1312	* @internal
1313	*/
1314	static DECLCALLBACK(int) dbgfR3BpDisable(PUVM pUVM, uint32_t iBp)
1315	{
1316	/*
1317	* Validate input.
1318	*/
1319	PVM pVM = pUVM->pVM;
1320	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1321	PDBGFBP pBp = dbgfR3BpGet(pVM, iBp);
1322	if (!pBp)
1323	return VERR_DBGF_BP_NOT_FOUND;
1324
1325	/*
1326	* Already enabled?
1327	*/
1328	if (!pBp->fEnabled)
1329	return VINF_DBGF_BP_ALREADY_DISABLED;
1330
1331	/*
1332	* Remove the breakpoint.
1333	*/
1334	pBp->fEnabled = false;
1335	int rc;
1336	switch (pBp->enmType)
1337	{
1338	case DBGFBPTYPE_REG:
1339	rc = dbgfR3BpRegDisarm(pVM, pBp);
1340	break;
1341
1342	case DBGFBPTYPE_INT3:
1343	rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE, dbgfR3BpDisableInt3OnCpu, pBp);
1344	break;
1345
1346	case DBGFBPTYPE_REM:
1347	#ifdef VBOX_WITH_REM
1348	rc = REMR3BreakpointClear(pVM, pBp->u.Rem.GCPtr);
1349	#else
1350	rc = IEMBreakpointClear(pVM, pBp->u.Rem.GCPtr);
1351	#endif
1352	break;
1353
1354	case DBGFBPTYPE_PORT_IO:
1355	case DBGFBPTYPE_MMIO:
1356	rc = dbgfR3BpUpdateIom(pVM);
1357	break;
1358
1359	default:
1360	AssertMsgFailedReturn(("Invalid enmType=%d!\n", pBp->enmType), VERR_IPE_NOT_REACHED_DEFAULT_CASE);
1361	}
1362
1363	return rc;
1364	}
1365
1366
1367	/**
1368	* Disables a breakpoint.
1369	*
1370	* @returns VBox status code.
1371	* @param pUVM The user mode VM handle.
1372	* @param iBp The id of the breakpoint which should be disabled.
1373	* @thread Any thread.
1374	*/
1375	VMMR3DECL(int) DBGFR3BpDisable(PUVM pUVM, uint32_t iBp)
1376	{
1377	/*
1378	* This must be done on EMT.
1379	*/
1380	int rc = VMR3ReqCallWaitU(pUVM, 0 /idDstCpu/, (PFNRT)dbgfR3BpDisable, 2, pUVM, iBp);
1381	LogFlow(("DBGFR3BpDisable: returns %Rrc\n", rc));
1382	return rc;
1383	}
1384
1385
1386	/**
1387	* EMT worker for DBGFR3BpEnum().
1388	*
1389	* @returns VBox status code.
1390	* @param pUVM The user mode VM handle.
1391	* @param pfnCallback The callback function.
1392	* @param pvUser The user argument to pass to the callback.
1393	* @thread EMT
1394	* @internal
1395	*/
1396	static DECLCALLBACK(int) dbgfR3BpEnum(PUVM pUVM, PFNDBGFBPENUM pfnCallback, void *pvUser)
1397	{
1398	/*
1399	* Validate input.
1400	*/
1401	PVM pVM = pUVM->pVM;
1402	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1403	AssertPtrReturn(pfnCallback, VERR_INVALID_POINTER);
1404
1405	/*
1406	* Enumerate the hardware breakpoints.
1407	*/
1408	unsigned i;
1409	for (i = 0; i < RT_ELEMENTS(pVM->dbgf.s.aHwBreakpoints); i++)
1410	if (pVM->dbgf.s.aHwBreakpoints[i].enmType != DBGFBPTYPE_FREE)
1411	{
1412	int rc = pfnCallback(pUVM, pvUser, &pVM->dbgf.s.aHwBreakpoints[i]);
1413	if (RT_FAILURE(rc) \|\| rc == VINF_CALLBACK_RETURN)
1414	return rc;
1415	}
1416
1417	/*
1418	* Enumerate the other breakpoints.
1419	*/
1420	for (i = 0; i < RT_ELEMENTS(pVM->dbgf.s.aBreakpoints); i++)
1421	if (pVM->dbgf.s.aBreakpoints[i].enmType != DBGFBPTYPE_FREE)
1422	{
1423	int rc = pfnCallback(pUVM, pvUser, &pVM->dbgf.s.aBreakpoints[i]);
1424	if (RT_FAILURE(rc) \|\| rc == VINF_CALLBACK_RETURN)
1425	return rc;
1426	}
1427
1428	return VINF_SUCCESS;
1429	}
1430
1431
1432	/**
1433	* Enumerate the breakpoints.
1434	*
1435	* @returns VBox status code.
1436	* @param pUVM The user mode VM handle.
1437	* @param pfnCallback The callback function.
1438	* @param pvUser The user argument to pass to the callback.
1439	* @thread Any thread but the callback will be called from EMT.
1440	*/
1441	VMMR3DECL(int) DBGFR3BpEnum(PUVM pUVM, PFNDBGFBPENUM pfnCallback, void *pvUser)
1442	{
1443	/*
1444	* This must be done on EMT.
1445	*/
1446	int rc = VMR3ReqPriorityCallWaitU(pUVM, 0 /idDstCpu/, (PFNRT)dbgfR3BpEnum, 3, pUVM, pfnCallback, pvUser);
1447	LogFlow(("DBGFR3BpEnum: returns %Rrc\n", rc));
1448	return rc;
1449	}
1450

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source: vbox/trunk/src/VBox/VMM/VMMR3/DBGFBp.cpp@ 73269

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