| 1 | /* $Id: VBoxGuestR3LibLog.cpp 68550 2017-08-31 12:09:41Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * VBoxGuestR3Lib - Ring-3 Support Library for VirtualBox guest additions, Logging.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2007-2016 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 | * The contents of this file may alternatively be used under the terms
|
|---|
| 18 | * of the Common Development and Distribution License Version 1.0
|
|---|
| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
|
|---|
| 20 | * VirtualBox OSE distribution, in which case the provisions of the
|
|---|
| 21 | * CDDL are applicable instead of those of the GPL.
|
|---|
| 22 | *
|
|---|
| 23 | * You may elect to license modified versions of this file under the
|
|---|
| 24 | * terms and conditions of either the GPL or the CDDL or both.
|
|---|
| 25 | */
|
|---|
| 26 |
|
|---|
| 27 |
|
|---|
| 28 | /*********************************************************************************************************************************
|
|---|
| 29 | * Header Files *
|
|---|
| 30 | *********************************************************************************************************************************/
|
|---|
| 31 | #include <iprt/mem.h>
|
|---|
| 32 | #include "VBGLR3Internal.h"
|
|---|
| 33 |
|
|---|
| 34 |
|
|---|
| 35 | /**
|
|---|
| 36 | * Write to the backdoor logger from ring 3 guest code.
|
|---|
| 37 | *
|
|---|
| 38 | * @returns IPRT status code.
|
|---|
| 39 | *
|
|---|
| 40 | * @param pch The string to log. Does not need to be terminated.
|
|---|
| 41 | * @param cch The number of chars (bytes) to log.
|
|---|
| 42 | *
|
|---|
| 43 | * @remarks This currently does not accept more than 255 bytes of data at
|
|---|
| 44 | * one time. It should probably be rewritten to use pass a pointer
|
|---|
| 45 | * in the IOCtl.
|
|---|
| 46 | */
|
|---|
| 47 | VBGLR3DECL(int) VbglR3WriteLog(const char *pch, size_t cch)
|
|---|
| 48 | {
|
|---|
| 49 | /*
|
|---|
| 50 | * Quietly skip empty strings.
|
|---|
| 51 | * (Happens in the RTLogBackdoorPrintf case.)
|
|---|
| 52 | */
|
|---|
| 53 | int rc;
|
|---|
| 54 | if (cch > 0)
|
|---|
| 55 | {
|
|---|
| 56 | if (RT_VALID_PTR(pch))
|
|---|
| 57 | {
|
|---|
| 58 | /*
|
|---|
| 59 | * We need to repackage the string for ring-0.
|
|---|
| 60 | */
|
|---|
| 61 | size_t cbMsg = VBGL_IOCTL_LOG_SIZE(cch);
|
|---|
| 62 | PVBGLIOCLOG pMsg = (PVBGLIOCLOG)RTMemTmpAlloc(cbMsg);
|
|---|
| 63 | if (pMsg)
|
|---|
| 64 | {
|
|---|
| 65 | VBGLREQHDR_INIT_EX(&pMsg->Hdr, VBGL_IOCTL_LOG_SIZE_IN(cch), VBGL_IOCTL_LOG_SIZE_OUT);
|
|---|
| 66 | memcpy(pMsg->u.In.szMsg, pch, cch);
|
|---|
| 67 | pMsg->u.In.szMsg[cch] = '\0';
|
|---|
| 68 | rc = vbglR3DoIOCtl(VBGL_IOCTL_LOG(cch), &pMsg->Hdr, cbMsg);
|
|---|
| 69 |
|
|---|
| 70 | RTMemTmpFree(pMsg);
|
|---|
| 71 | }
|
|---|
| 72 | else
|
|---|
| 73 | rc = VERR_NO_TMP_MEMORY;
|
|---|
| 74 | }
|
|---|
| 75 | else
|
|---|
| 76 | rc = VERR_INVALID_POINTER;
|
|---|
| 77 | }
|
|---|
| 78 | else
|
|---|
| 79 | rc = VINF_SUCCESS;
|
|---|
| 80 | return rc;
|
|---|
| 81 | }
|
|---|
| 82 |
|
|---|
