VMAll.cpp@ 71048

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1	/* $Id: VMAll.cpp 69111 2017-10-17 14:26:02Z vboxsync $ */
2	/** @file
3	* VM - Virtual Machine All Contexts.
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_VM
23	#include "VMInternal.h"
24	#include <VBox/vmm/vmm.h>
25	#include <VBox/vmm/mm.h>
26	#include <VBox/vmm/vm.h>
27	#include <VBox/err.h>
28	#include <VBox/log.h>
29
30	#include <iprt/assert.h>
31	#include <iprt/string.h>
32	#ifndef IN_RC
33	# include <iprt/thread.h>
34	#endif
35
36
37	/**
38	* Sets the error message.
39	*
40	* @returns rc. Meaning you can do:
41	* @code
42	* return VM_SET_ERROR(pVM, VERR_OF_YOUR_CHOICE, "descriptive message");
43	* @endcode
44	* @param pVM The cross context VM structure.
45	* @param rc VBox status code.
46	* @param SRC_POS Use RT_SRC_POS.
47	* @param pszFormat Error message format string.
48	* @param ... Error message arguments.
49	* @thread Any
50	*/
51	VMMDECL(int) VMSetError(PVM pVM, int rc, RT_SRC_POS_DECL, const char *pszFormat, ...)
52	{
53	va_list args;
54	va_start(args, pszFormat);
55	int rc2 = VMSetErrorV(pVM, rc, RT_SRC_POS_ARGS, pszFormat, args); Assert(rc == rc2); NOREF(rc2);
56	va_end(args);
57	return rc;
58	}
59
60
61	/**
62	* Sets the error message.
63	*
64	* @returns rc. Meaning you can do:
65	* @code
66	* return VM_SET_ERROR(pVM, VERR_OF_YOUR_CHOICE, "descriptive message");
67	* @endcode
68	* @param pVM The cross context VM structure.
69	* @param rc VBox status code.
70	* @param SRC_POS Use RT_SRC_POS.
71	* @param pszFormat Error message format string.
72	* @param args Error message arguments.
73	* @thread Any
74	*/
75	VMMDECL(int) VMSetErrorV(PVM pVM, int rc, RT_SRC_POS_DECL, const char *pszFormat, va_list args)
76	{
77	#ifdef IN_RING3
78	/*
79	* Switch to EMT.
80	*/
81	va_list va2;
82	va_copy(va2, args); /* Have to make a copy here or GCC will break. */
83	VMR3ReqPriorityCallWait(pVM, VMCPUID_ANY, (PFNRT)vmR3SetErrorUV, 7, /* ASSUMES 3 source pos args! */
84	pVM->pUVM, rc, RT_SRC_POS_ARGS, pszFormat, &va2);
85	va_end(va2);
86
87	#else
88	/*
89	* We're already on the EMT thread and can safely create a VMERROR chunk.
90	*/
91	vmSetErrorCopy(pVM, rc, RT_SRC_POS_ARGS, pszFormat, args);
92	VMMRZCallRing3NoCpu(pVM, VMMCALLRING3_VM_SET_ERROR, 0);
93	#endif
94	return rc;
95	}
96
97
98	/**
99	* Copies the error to a VMERROR structure.
100	*
101	* This is mainly intended for Ring-0 and GC where the error must be copied to
102	* memory accessible from ring-3. But it's just possible that we might add
103	* APIs for retrieving the VMERROR copy later.
104	*
105	* @param pVM The cross context VM structure.
106	* @param rc VBox status code.
107	* @param SRC_POS Use RT_SRC_POS.
108	* @param pszFormat Error message format string.
109	* @param args Error message arguments.
110	* @thread EMT
111	*/
112	void vmSetErrorCopy(PVM pVM, int rc, RT_SRC_POS_DECL, const char *pszFormat, va_list args)
113	{
114	NOREF(pVM); NOREF(rc); RT_SRC_POS_NOREF(); NOREF(pszFormat); NOREF(args);
115	#if 0 /// @todo implement Ring-0 and GC VMSetError
116	/*
117	* Create the untranslated message copy.
118	*/
119	/* free any old message. */
120	MMHyperFree(pVM, MMHyperR32Ctx(pVM, pVM->vm.s.pError));
121	pVM->vm.s.pError = NULL;
122
123	/* calc reasonable start size. */
124	size_t cchFile = pszFile ? strlen(pszFile) : 0;
125	size_t cchFunction = pszFunction ? strlen(pszFunction) : 0;
126	size_t cchFormat = strlen(pszFormat);
127	size_t cb = sizeof(VMERROR)
128	+ cchFile + 1
129	+ cchFunction + 1
130	+ cchFormat + 32;
131
132	/* allocate it */
133	void *pv;
134	int rc2 = MMHyperAlloc(pVM, cb, 0, MM_TAG_VM, &pv);
135	if (RT_SUCCESS(rc2))
136	{
137	/* initialize it. */
138	PVMERROR pErr = (PVMERROR)pv;
139	pErr->cbAllocated = cb;
140	pErr->iLine = iLine;
141	pErr->off = sizeof(VMERROR);
142	pErr->offFile = pErr->offFunction = 0;
143
144	if (cchFile)
145	{
146	pErr->offFile = pErr->off;
147	memcpy((uint8_t *)pErr + pErr->off, pszFile, cchFile + 1);
148	pErr->off += cchFile + 1;
149	}
150
151	if (cchFunction)
152	{
153	pErr->offFunction = pErr->off;
154	memcpy((uint8_t *)pErr + pErr->off, pszFunction, cchFunction + 1);
155	pErr->off += cchFunction + 1;
156	}
157
158	pErr->offMessage = pErr->off;
159
160	/* format the message (pErr might be reallocated) */
161	VMSETERRORFMTARGS Args;
162	Args.pVM = pVM;
163	Args.pErr = pErr;
164
165	va_list va2;
166	va_copy(va2, args);
167	RTStrFormatV(vmSetErrorFmtOut, &pErr, NULL, NULL, &pszFormatTmp, args);
168	va_end(va2);
169
170	/* done. */
171	pVM->vm.s.pErrorR3 = MMHyper2HC(pVM, (uintptr_t)pArgs.pErr);
172	}
173	#endif
174	}
175
176
177	/**
178	* Sets the runtime error message.
179	*
180	* As opposed VMSetError(), this method is intended to inform the VM user about
181	* errors and error-like conditions that happen at an arbitrary point during VM
182	* execution (like "host memory low" or "out of host disk space").
183	*
184	* @returns VBox status code. For some flags the status code <b>must</b> be
185	* propagated up the stack.
186	*
187	* @param pVM The cross context VM structure.
188	*
189	* @param fFlags Flags indicating which actions to take.
190	* See VMSETRTERR_FLAGS_* for details on each flag.
191	*
192	* @param pszErrorId Unique error identification string. This is used by
193	* the frontends and maybe other devices or drivers, so
194	* once an ID has been selected it's essentially
195	* unchangable. Employ camelcase when constructing the
196	* string, leave out spaces.
197	*
198	* The registered runtime error callbacks should string
199	* switch on this and handle the ones it knows
200	* specifically and the unknown ones generically.
201	*
202	* @param pszFormat Error message format string.
203	* @param ... Error message arguments.
204	*
205	* @thread Any
206	*/
207	VMMDECL(int) VMSetRuntimeError(PVM pVM, uint32_t fFlags, const char pszErrorId, const char pszFormat, ...)
208	{
209	va_list va;
210	va_start(va, pszFormat);
211	int rc = VMSetRuntimeErrorV(pVM, fFlags, pszErrorId, pszFormat, va);
212	va_end(va);
213	return rc;
214	}
215
216
217	/**
218	* va_list version of VMSetRuntimeError.
219	*
220	* @returns VBox status code. For some flags the status code <b>must</b> be
221	* propagated up the stack.
222	*
223	* @param pVM The cross context VM structure.
224	* @param fFlags Flags indicating which actions to take. See
225	* VMSETRTERR_FLAGS_*.
226	* @param pszErrorId Error ID string.
227	* @param pszFormat Error message format string.
228	* @param va Error message arguments.
229	*
230	* @thread Any
231	*/
232	VMMDECL(int) VMSetRuntimeErrorV(PVM pVM, uint32_t fFlags, const char pszErrorId, const char pszFormat, va_list va)
233	{
234	Log(("VMSetRuntimeErrorV: fFlags=%#x pszErrorId=%s\n", fFlags, pszErrorId));
235
236	/*
237	* Relaxed parameter validation.
238	*/
239	AssertPtr(pVM);
240	AssertMsg(!(fFlags & ~(VMSETRTERR_FLAGS_NO_WAIT \| VMSETRTERR_FLAGS_SUSPEND \| VMSETRTERR_FLAGS_FATAL)), ("%#x\n", fFlags));
241	Assert(!(fFlags & VMSETRTERR_FLAGS_NO_WAIT) \|\| !VM_IS_EMT(pVM));
242	Assert(!(fFlags & VMSETRTERR_FLAGS_SUSPEND) \|\| !(fFlags & VMSETRTERR_FLAGS_FATAL));
243	AssertPtr(pszErrorId);
244	Assert(*pszErrorId);
245	Assert(RTStrEnd(pszErrorId, 128) != NULL);
246	AssertPtr(pszFormat);
247	Assert(RTStrEnd(pszFormat, 512) != NULL);
248
249	#ifdef IN_RING3
250	/*
251	* Switch to EMT.
252	*
253	* If it's a no-wait request, we have to format the message into a buffer
254	* here since the variable arguments list will become invalid once we call
255	* va_end and return.
256	*/
257	int rc;
258	if ( !(fFlags & VMSETRTERR_FLAGS_NO_WAIT)
259	\|\| VM_IS_EMT(pVM))
260	{
261	fFlags &= ~VMSETRTERR_FLAGS_NO_WAIT;
262
263	va_list va2;
264	va_copy(va2, va); /* Have to make a copy here or GCC will break. */
265	rc = VMR3ReqPriorityCallWait(pVM, VMCPUID_ANY,
266	(PFNRT)vmR3SetRuntimeErrorV, 5, pVM, fFlags, pszErrorId, pszFormat, &va2);
267	va_end(va2);
268	}
269	else
270	{
271	char *pszMessage = MMR3HeapAPrintfV(pVM, MM_TAG_VM, pszFormat, va);
272	rc = VMR3ReqCallNoWait(pVM, VMCPUID_ANY,
273	(PFNRT)vmR3SetRuntimeError, 4, pVM, fFlags, pszErrorId, pszMessage);
274	if (RT_FAILURE(rc))
275	MMR3HeapFree(pszMessage);
276	}
277
278	#else
279	/*
280	* We're already on the EMT and can safely create a VMRUNTIMEERROR chunk.
281	*/
282	AssertReleaseMsgFailed(("Congratulations! You will have the pleasure of debugging the RC/R0 path.\n"));
283	vmSetRuntimeErrorCopy(pVM, fFlags, pszErrorId, pszFormat, va);
284
285	int rc = VMMRZCallRing3NoCpu(pVM, VMMCALLRING3_VM_SET_RUNTIME_ERROR, 0);
286	#endif
287
288	Log(("VMSetRuntimeErrorV: returns %Rrc (pszErrorId=%s)\n", rc, pszErrorId));
289	return rc;
290	}
291
292
293	/**
294	* Copies the error to a VMRUNTIMEERROR structure.
295	*
296	* This is mainly intended for Ring-0 and RC where the error must be copied to
297	* memory accessible from ring-3. But it's just possible that we might add
298	* APIs for retrieving the VMRUNTIMEERROR copy later.
299	*
300	* @param pVM The cross context VM structure.
301	* @param fFlags The error flags.
302	* @param pszErrorId Error ID string.
303	* @param pszFormat Error message format string.
304	* @param va Error message arguments. This is of course spoiled
305	* by this call.
306	* @thread EMT
307	*/
308	void vmSetRuntimeErrorCopy(PVM pVM, uint32_t fFlags, const char pszErrorId, const char pszFormat, va_list va)
309	{
310	NOREF(pVM); NOREF(fFlags); NOREF(pszErrorId); NOREF(pszFormat); NOREF(va);
311	#if 0 /// @todo implement Ring-0 and GC VMSetError
312	/*
313	* Create the untranslated message copy.
314	*/
315	/* free any old message. */
316	MMHyperFree(pVM, MMHyperR32Ctx(pVM, pVM->vm.s.pRuntimeErrorR3));
317	pVM->vm.s.pRuntimeErrorR3 = NULL;
318
319	/* calc reasonable start size. */
320	size_t cchErrorID = pszErrorId ? strlen(pszErrorId) : 0;
321	size_t cchFormat = strlen(pszFormat);
322	size_t cb = sizeof(VMRUNTIMEERROR)
323	+ cchErrorID + 1
324	+ cchFormat + 32;
325
326	/* allocate it */
327	void *pv;
328	int rc2 = MMHyperAlloc(pVM, cb, 0, MM_TAG_VM, &pv);
329	if (RT_SUCCESS(rc2))
330	{
331	/* initialize it. */
332	PVMRUNTIMEERROR pErr = (PVMRUNTIMEERROR)pv;
333	pErr->cbAllocated = cb;
334	pErr->fFlags = fFlags;
335	pErr->off = sizeof(PVMRUNTIMEERROR);
336	pErr->offErrorID = 0;
337
338	if (cchErrorID)
339	{
340	pErr->offErrorID = pErr->off;
341	memcpy((uint8_t *)pErr + pErr->off, pszErrorId, cchErrorID + 1);
342	pErr->off += cchErrorID + 1;
343	}
344
345	pErr->offMessage = pErr->off;
346
347	/* format the message (pErr might be reallocated) */
348	VMSETRUNTIMEERRORFMTARGS Args;
349	Args.pVM = pVM;
350	Args.pErr = pErr;
351
352	va_list va2;
353	va_copy(va2, args);
354	RTStrFormatV(vmSetRuntimeErrorFmtOut, &pErr, NULL, NULL, &pszFormatTmp, args);
355	va_end(va2);
356
357	/* done. */
358	pVM->vm.s.pErrorRuntimeR3 = MMHyper2HC(pVM, (uintptr_t)pArgs.pErr);
359	}
360	#endif
361	}
362
363
364	/**
365	* Gets the name of VM state.
366	*
367	* @returns Pointer to a read-only string with the state name.
368	* @param enmState The state.
369	*/
370	VMMDECL(const char *) VMGetStateName(VMSTATE enmState)
371	{
372	switch (enmState)
373	{
374	#define MY_CASE(enm) case VMSTATE_##enm: return #enm;
375	MY_CASE(CREATING);
376	MY_CASE(CREATED);
377	MY_CASE(RUNNING);
378	MY_CASE(LOADING);
379	MY_CASE(LOAD_FAILURE);
380	MY_CASE(SAVING);
381	MY_CASE(SUSPENDED);
382	MY_CASE(RESETTING);
383	MY_CASE(GURU_MEDITATION);
384	MY_CASE(OFF);
385	MY_CASE(DESTROYING);
386	MY_CASE(TERMINATED);
387	#undef MY_CASE
388	default:
389	return "Unknown";
390	}
391	}
392

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source: vbox/trunk/src/VBox/VMM/VMMAll/VMAll.cpp@ 71048

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