/* $Id: VMAll.cpp 62478 2016-07-22 18:29:06Z vboxsync $ */ /** @file * VM - Virtual Machine All Contexts. */ /* * Copyright (C) 2006-2016 Oracle Corporation * * 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 (GPL) 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 #include #ifndef IN_RC # include #endif /** * 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 The cross context VM structure. * @param rc VBox status code. * @param SRC_POS Use RT_SRC_POS. * @param pszFormat Error message format string. * @param ... Error message arguments. * @thread Any */ VMMDECL(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 The cross context VM structure. * @param rc VBox status code. * @param SRC_POS Use RT_SRC_POS. * @param pszFormat Error message format string. * @param args Error message arguments. * @thread Any */ VMMDECL(int) VMSetErrorV(PVM pVM, int rc, RT_SRC_POS_DECL, const char *pszFormat, va_list args) { #ifdef IN_RING3 /* * Switch to EMT. */ va_list va2; va_copy(va2, args); /* Have to make a copy here or GCC will break. */ VMR3ReqPriorityCallWait(pVM, VMCPUID_ANY, (PFNRT)vmR3SetErrorUV, 7, /* ASSUMES 3 source pos args! */ pVM->pUVM, rc, RT_SRC_POS_ARGS, pszFormat, &va2); va_end(va2); #else /* * We're already on the EMT thread and can safely create a VMERROR chunk. */ vmSetErrorCopy(pVM, rc, RT_SRC_POS_ARGS, pszFormat, args); VMMRZCallRing3NoCpu(pVM, VMMCALLRING3_VM_SET_ERROR, 0); #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 The cross context VM structure. * @param rc VBox status code. * @param SRC_POS 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) { NOREF(pVM); NOREF(rc); RT_SRC_POS_NOREF(); NOREF(pszFormat); NOREF(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 (RT_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"). * * @returns VBox status code. For some flags the status code must be * propagated up the stack. * * @param pVM The cross context VM structure. * * @param fFlags Flags indicating which actions to take. * See VMSETRTERR_FLAGS_* for details on each flag. * * @param pszErrorId Unique error identification string. This is used by * the frontends and maybe other devices or drivers, so * once an ID has been selected it's essentially * unchangable. Employ camelcase when constructing the * string, leave out spaces. * * The registered runtime error callbacks should string * switch on this and handle the ones it knows * specifically and the unknown ones generically. * * @param pszFormat Error message format string. * @param ... Error message arguments. * * @thread Any */ VMMDECL(int) VMSetRuntimeError(PVM pVM, uint32_t fFlags, const char *pszErrorId, const char *pszFormat, ...) { va_list va; va_start(va, pszFormat); int rc = VMSetRuntimeErrorV(pVM, fFlags, pszErrorId, pszFormat, va); va_end(va); return rc; } /** * va_list version of VMSetRuntimeError. * * @returns VBox status code. For some flags the status code must be * propagated up the stack. * * @param pVM The cross context VM structure. * @param fFlags Flags indicating which actions to take. See * VMSETRTERR_FLAGS_*. * @param pszErrorId Error ID string. * @param pszFormat Error message format string. * @param va Error message arguments. * * @thread Any */ VMMDECL(int) VMSetRuntimeErrorV(PVM pVM, uint32_t fFlags, const char *pszErrorId, const char *pszFormat, va_list va) { Log(("VMSetRuntimeErrorV: fFlags=%#x pszErrorId=%s\n", fFlags, pszErrorId)); /* * Relaxed parameter validation. */ AssertPtr(pVM); AssertMsg(!(fFlags & ~(VMSETRTERR_FLAGS_NO_WAIT | VMSETRTERR_FLAGS_SUSPEND | VMSETRTERR_FLAGS_FATAL)), ("%#x\n", fFlags)); Assert(!(fFlags & VMSETRTERR_FLAGS_NO_WAIT) || !VM_IS_EMT(pVM)); Assert(!(fFlags & VMSETRTERR_FLAGS_SUSPEND) || !(fFlags & VMSETRTERR_FLAGS_FATAL)); AssertPtr(pszErrorId); Assert(*pszErrorId); Assert(RTStrEnd(pszErrorId, 128) != NULL); AssertPtr(pszFormat); Assert(RTStrEnd(pszFormat, 512) != NULL); #ifdef IN_RING3 /* * Switch to EMT. * * If it's a no-wait request, we have to format the message into a buffer * here since the variable arguments list will become invalid once we call * va_end and return. */ int rc; if ( !(fFlags & VMSETRTERR_FLAGS_NO_WAIT) || VM_IS_EMT(pVM)) { fFlags &= ~VMSETRTERR_FLAGS_NO_WAIT; va_list va2; va_copy(va2, va); /* Have to make a copy here or GCC will break. */ rc = VMR3ReqPriorityCallWait(pVM, VMCPUID_ANY, (PFNRT)vmR3SetRuntimeErrorV, 5, pVM, fFlags, pszErrorId, pszFormat, &va2); va_end(va2); } else { char *pszMessage = MMR3HeapAPrintfV(pVM, MM_TAG_VM, pszFormat, va); rc = VMR3ReqCallNoWait(pVM, VMCPUID_ANY, (PFNRT)vmR3SetRuntimeError, 4, pVM, fFlags, pszErrorId, pszMessage); if (RT_FAILURE(rc)) MMR3HeapFree(pszMessage); } #else /* * We're already on the EMT and can safely create a VMRUNTIMEERROR chunk. */ AssertReleaseMsgFailed(("Congratulations! You will have the pleasure of debugging the RC/R0 path.\n")); vmSetRuntimeErrorCopy(pVM, fFlags, pszErrorId, pszFormat, va); int rc = VMMRZCallRing3NoCpu(pVM, VMMCALLRING3_VM_SET_RUNTIME_ERROR, 0); #endif Log(("VMSetRuntimeErrorV: returns %Rrc (pszErrorId=%s)\n", rc, pszErrorId)); return rc; } /** * Copies the error to a VMRUNTIMEERROR structure. * * This is mainly intended for Ring-0 and RC 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 The cross context VM structure. * @param fFlags The error flags. * @param pszErrorId Error ID string. * @param pszFormat Error message format string. * @param va Error message arguments. This is of course spoiled * by this call. * @thread EMT */ void vmSetRuntimeErrorCopy(PVM pVM, uint32_t fFlags, const char *pszErrorId, const char *pszFormat, va_list va) { NOREF(pVM); NOREF(fFlags); NOREF(pszErrorId); NOREF(pszFormat); NOREF(va); #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 (RT_SUCCESS(rc2)) { /* initialize it. */ PVMRUNTIMEERROR pErr = (PVMRUNTIMEERROR)pv; pErr->cbAllocated = cb; pErr->fFlags = fFlags; 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 } /** * Gets the name of VM state. * * @returns Pointer to a read-only string with the state name. * @param enmState The state. */ VMMDECL(const char *) VMGetStateName(VMSTATE enmState) { switch (enmState) { #define MY_CASE(enm) case VMSTATE_##enm: return #enm; MY_CASE(CREATING); MY_CASE(CREATED); MY_CASE(RUNNING); MY_CASE(LOADING); MY_CASE(LOAD_FAILURE); MY_CASE(SAVING); MY_CASE(SUSPENDED); MY_CASE(RESETTING); MY_CASE(GURU_MEDITATION); MY_CASE(OFF); MY_CASE(DESTROYING); MY_CASE(TERMINATED); #undef MY_CASE default: return "Unknown"; } }