VMAll.cpp revision e51f08def2ef45b1531dccebfad06819cf7c0601
/* $Id$ */
/** @file
* VM - Virtual Machine All Contexts.
*/
/*
* Copyright (C) 2006-2007 innotek GmbH
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License as published by the Free Software Foundation,
* in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
* distribution. VirtualBox OSE is distributed in the hope that it will
* be useful, but WITHOUT ANY WARRANTY of any kind.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#define LOG_GROUP LOG_GROUP_VM
#include "VMInternal.h"
#include <VBox/vmm.h>
#include <VBox/mm.h>
#include <VBox/vm.h>
#include <VBox/err.h>
#include <iprt/assert.h>
#include <iprt/string.h>
/**
* Sets the error message.
*
* @returns rc. Meaning you can do:
* @code
* return VM_SET_ERROR(pVM, VERR_OF_YOUR_CHOICE, "descriptive message");
* @endcode
* @param pVM VM handle. Must be non-NULL.
* @param rc VBox status code.
* @param RT_SRC_POS_DECL Use RT_SRC_POS.
* @param pszFormat Error message format string.
* @param ... Error message arguments.
* @thread Any
*/
VMDECL(int) VMSetError(PVM pVM, int rc, RT_SRC_POS_DECL, const char *pszFormat, ...)
{
va_list args;
va_start(args, pszFormat);
int rc2 = VMSetErrorV(pVM, rc, RT_SRC_POS_ARGS, pszFormat, args); Assert(rc == rc2); NOREF(rc2);
va_end(args);
return rc;
}
/**
* Sets the error message.
*
* @returns rc. Meaning you can do:
* @code
* return VM_SET_ERROR(pVM, VERR_OF_YOUR_CHOICE, "descriptive message");
* @endcode
* @param pVM VM handle. Must be non-NULL.
* @param rc VBox status code.
* @param RT_SRC_POS_DECL Use RT_SRC_POS.
* @param pszFormat Error message format string.
* @param args Error message arguments.
* @thread Any
*/
VMDECL(int) VMSetErrorV(PVM pVM, int rc, RT_SRC_POS_DECL, const char *pszFormat, va_list args)
{
#ifdef IN_RING3
/*
* Switch to EMT.
*/
PVMREQ pReq;
VMR3ReqCall(pVM, &pReq, RT_INDEFINITE_WAIT, (PFNRT)vmR3SetErrorV, 7, /* ASSUMES 3 source pos args! */
pVM, rc, RT_SRC_POS_ARGS, pszFormat, &args);
VMR3ReqFree(pReq);
#else
/*
* We're already on the EMT thread and can safely create a VMERROR chunk.
*/
vmSetErrorCopy(pVM, rc, RT_SRC_POS_ARGS, pszFormat, args);
# ifdef IN_GC
VMMGCCallHost(pVM, VMMCALLHOST_VM_SET_ERROR, 0);
# elif defined(IN_RING0)
VMMR0CallHost(pVM, VMMCALLHOST_VM_SET_ERROR, 0);
# else
# endif
#endif
return rc;
}
/**
* Copies the error to a VMERROR structure.
*
* This is mainly intended for Ring-0 and GC where the error must be copied to
* memory accessible from ring-3. But it's just possible that we might add
* APIs for retrieving the VMERROR copy later.
*
* @param pVM VM handle. Must be non-NULL.
* @param rc VBox status code.
* @param RT_SRC_POS_DECL Use RT_SRC_POS.
* @param pszFormat Error message format string.
* @param args Error message arguments.
* @thread EMT
*/
void vmSetErrorCopy(PVM pVM, int rc, RT_SRC_POS_DECL, const char *pszFormat, va_list args)
{
#if 0 /// @todo implement Ring-0 and GC VMSetError
/*
* Create the untranslated message copy.
*/
/* free any old message. */
MMHyperFree(pVM, MMHyperR32Ctx(pVM, pVM->vm.s.pError));
pVM->vm.s.pError = NULL;
/* calc reasonable start size. */
size_t cchFile = pszFile ? strlen(pszFile) : 0;
size_t cchFunction = pszFunction ? strlen(pszFunction) : 0;
size_t cchFormat = strlen(pszFormat);
size_t cb = sizeof(VMERROR)
+ cchFile + 1
+ cchFunction + 1
+ cchFormat + 32;
/* allocate it */
void *pv;
int rc2 = MMHyperAlloc(pVM, cb, 0, MM_TAG_VM, &pv);
if (VBOX_SUCCESS(rc2))
{
/* initialize it. */
PVMERROR pErr = (PVMERROR)pv;
pErr->cbAllocated = cb;
pErr->iLine = iLine;
pErr->off = sizeof(VMERROR);
pErr->offFile = pErr->offFunction = 0;
if (cchFile)
{
pErr->offFile = pErr->off;
memcpy((uint8_t *)pErr + pErr->off, pszFile, cchFile + 1);
pErr->off += cchFile + 1;
}
if (cchFunction)
{
pErr->offFunction = pErr->off;
memcpy((uint8_t *)pErr + pErr->off, pszFunction, cchFunction + 1);
pErr->off += cchFunction + 1;
}
pErr->offMessage = pErr->off;
/* format the message (pErr might be reallocated) */
VMSETERRORFMTARGS Args;
Args.pVM = pVM;
Args.pErr = pErr;
va_list va2;
va_copy(va2, args);
RTStrFormatV(vmSetErrorFmtOut, &pErr, NULL, NULL, &pszFormatTmp, args);
va_end(va2);
/* done. */
pVM->vm.s.pErrorR3 = MMHyper2HC(pVM, (uintptr_t)pArgs.pErr);
}
#endif
}
/**
* Sets the runtime error message.
* As opposed VMSetError(), this method is intended to inform the VM user about
* errors and error-like conditions that happen at an arbitrary point during VM
* execution (like "host memory low" or "out of host disk space").
*
* The @a fFatal parameter defines whether the error is fatal or not. If it is
* true, then it is expected that the caller has already paused the VM execution
* before calling this method. The VM user is supposed to power off the VM
* immediately after it has received the runtime error notification via the
* FNVMATRUNTIMEERROR callback.
*
* If @a fFatal is false, then the paused state of the VM defines the kind of
* the error. If the VM is paused before calling this method, it means that
* the VM user may try to fix the error condition (i.e. free more host memory)
* and then resume the VM execution. If the VM is not paused before calling
* this method, it means that the given error is a warning about an error
* condition that may happen soon but that doesn't directly affect the
* VM execution by the time of the call.
*
* The @a pszErrorID parameter defines an unique error identificator.
* It is used by the front-ends to show a proper message to the end user
* containig possible actions (for example, Retry/Ignore). For this reason,
* an error ID assigned once to some particular error condition should not
* change in the future. The format of this parameter is "someErrorCondition".
*
* @param pVM VM handle. Must be non-NULL.
* @param fFatal Whether it is a fatal error or not.
* @param pszErrorID Error ID string.
* @param pszFormat Error message format string.
* @param ... Error message arguments.
*
* @return VBox status code (whether the error has been successfully set
* and delivered to callbacks or not).
*
* @thread Any
* @todo r=bird: The pausing/suspending of the VM should be done here, we'll just end
* up duplicating code all over the place otherwise. In the case of
* devices/drivers/etc they might not be trusted to pause/suspend the
* vm even. Change fFatal to fFlags and define action flags and a fatal flag.
*
* Also, why a string ID and not an enum?
*/
VMDECL(int) VMSetRuntimeError(PVM pVM, bool fFatal, const char *pszErrorID,
const char *pszFormat, ...)
{
va_list args;
va_start(args, pszFormat);
int rc = VMSetRuntimeErrorV(pVM, fFatal, pszErrorID, pszFormat, args);
va_end(args);
return rc;
}
/**
* va_list version of VMSetRuntimeError.
*
* @param pVM VM handle. Must be non-NULL.
* @param fFatal Whether it is a fatal error or not.
* @param pszErrorID Error ID string.
* @param pszFormat Error message format string.
* @param args Error message arguments.
*
* @return VBox status code (whether the error has been successfully set
* and delivered to callbacks or not).
*
* @thread Any
*/
VMDECL(int) VMSetRuntimeErrorV(PVM pVM, bool fFatal, const char *pszErrorID,
const char *pszFormat, va_list args)
{
#ifdef IN_RING3
/*
* Switch to EMT.
*/
va_list WorkaroundVA;
va_copy(WorkaroundVA, args); /* Have to make a copy here or GCC will break. */
PVMREQ pReq;
VMR3ReqCall(pVM, &pReq, RT_INDEFINITE_WAIT, (PFNRT)vmR3SetRuntimeErrorV, 5,
pVM, fFatal, pszErrorID, pszFormat, &WorkaroundVA);
VMR3ReqFree(pReq);
va_end(WorkaroundVA);
#else
/*
* We're already on the EMT thread and can safely create a VMRUNTIMEERROR chunk.
*/
vmSetRuntimeErrorCopy(pVM, fFatal, pszErrorID, pszFormat, args);
# ifdef IN_GC
VMMGCCallHost(pVM, VMMCALLHOST_VM_SET_RUNTIME_ERROR, 0);
# elif defined(IN_RING0)
VMMR0CallHost(pVM, VMMCALLHOST_VM_SET_RUNTIME_ERROR, 0);
# else
# endif
#endif
return VINF_SUCCESS;
}
/**
* Copies the error to a VMRUNTIMEERROR structure.
*
* This is mainly intended for Ring-0 and GC where the error must be copied to
* memory accessible from ring-3. But it's just possible that we might add
* APIs for retrieving the VMRUNTIMEERROR copy later.
*
* @param pVM VM handle. Must be non-NULL.
* @param fFatal Whether it is a fatal error or not.
* @param pszErrorID Error ID string.
* @param pszFormat Error message format string.
* @param args Error message arguments.
* @thread EMT
*/
void vmSetRuntimeErrorCopy(PVM pVM, bool fFatal, const char *pszErrorID,
const char *pszFormat, va_list args)
{
#if 0 /// @todo implement Ring-0 and GC VMSetError
/*
* Create the untranslated message copy.
*/
/* free any old message. */
MMHyperFree(pVM, MMHyperR32Ctx(pVM, pVM->vm.s.pRuntimeErrorR3));
pVM->vm.s.pRuntimeErrorR3 = NULL;
/* calc reasonable start size. */
size_t cchErrorID = pszErrorID ? strlen(pszErrorID) : 0;
size_t cchFormat = strlen(pszFormat);
size_t cb = sizeof(VMRUNTIMEERROR)
+ cchErrorID + 1
+ cchFormat + 32;
/* allocate it */
void *pv;
int rc2 = MMHyperAlloc(pVM, cb, 0, MM_TAG_VM, &pv);
if (VBOX_SUCCESS(rc2))
{
/* initialize it. */
PVMRUNTIMEERROR pErr = (PVMRUNTIMEERROR)pv;
pErr->cbAllocated = cb;
pErr->off = sizeof(PVMRUNTIMEERROR);
pErr->offErrorID = = 0;
if (cchErrorID)
{
pErr->offErrorID = pErr->off;
memcpy((uint8_t *)pErr + pErr->off, pszErrorID, cchErrorID + 1);
pErr->off += cchErrorID + 1;
}
pErr->offMessage = pErr->off;
/* format the message (pErr might be reallocated) */
VMSETRUNTIMEERRORFMTARGS Args;
Args.pVM = pVM;
Args.pErr = pErr;
va_list va2;
va_copy(va2, args);
RTStrFormatV(vmSetRuntimeErrorFmtOut, &pErr, NULL, NULL, &pszFormatTmp, args);
va_end(va2);
/* done. */
pVM->vm.s.pErrorRuntimeR3 = MMHyper2HC(pVM, (uintptr_t)pArgs.pErr);
}
#endif
}