/* $Id: VMAll.cpp 4520 2007-09-05 07:17:14Z vboxsync $ */ /** @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 #include #include #include #include #include /** * 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 }