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/* $Id: VBoxMpLogger.cpp $ */
/** @file
* VBox WDDM Display logger implementation
*
* We're unable to use standard r3 vbgl-based backdoor logging API because
* win8 Metro apps can not do CreateFile/Read/Write by default. This is why
* we use miniport escape functionality to issue backdoor log string to the
* miniport and submit it to host via standard r0 backdoor logging api
* accordingly
*/
/*
* Copyright (C) 2018-2022 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program 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 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#define IPRT_NO_CRT_FOR_3RD_PARTY /* To get malloc and free wrappers in IPRT_NO_CRT mode. Doesn't link with IPRT in non-no-CRT mode. */
#include "UmHlpInternal.h"
#include <../../../common/wddm/VBoxMPIf.h>
#include <stdlib.h>
#ifdef IPRT_NO_CRT
# include <iprt/process.h>
# include <iprt/string.h>
#else
# include <stdio.h>
#endif
#include <VBox/VBoxGuestLib.h>
static void VBoxDispMpLoggerLogN(const char *pchString, size_t cchString)
{
D3DKMTFUNCTIONS const *d3dkmt = D3DKMTFunctions();
if (d3dkmt->pfnD3DKMTEscape == NULL)
return;
D3DKMT_HANDLE hAdapter;
NTSTATUS Status = vboxDispKmtOpenAdapter(&hAdapter);
Assert(Status == STATUS_SUCCESS);
if (Status == 0)
{
uint32_t cchString2 = (uint32_t)RT_MIN(cchString, _64K - 1U);
uint32_t cbCmd = RT_UOFFSETOF_DYN(VBOXDISPIFESCAPE_DBGPRINT, aStringBuf[cchString2 + 1]);
PVBOXDISPIFESCAPE_DBGPRINT pCmd = (PVBOXDISPIFESCAPE_DBGPRINT)malloc(cbCmd);
Assert(pCmd);
if (pCmd)
{
pCmd->EscapeHdr.escapeCode = VBOXESC_DBGPRINT;
pCmd->EscapeHdr.u32CmdSpecific = 0;
memcpy(pCmd->aStringBuf, pchString, cchString2);
pCmd->aStringBuf[cchString2] = '\0';
D3DKMT_ESCAPE EscapeData;
memset(&EscapeData, 0, sizeof(EscapeData));
EscapeData.hAdapter = hAdapter;
// EscapeData.hDevice = NULL;
EscapeData.Type = D3DKMT_ESCAPE_DRIVERPRIVATE;
// EscapeData.Flags.HardwareAccess = 0;
EscapeData.pPrivateDriverData = pCmd;
EscapeData.PrivateDriverDataSize = cbCmd;
// EscapeData.hContext = NULL;
Status = d3dkmt->pfnD3DKMTEscape(&EscapeData);
Assert(Status == STATUS_SUCCESS);
free(pCmd);
}
Status = vboxDispKmtCloseAdapter(hAdapter);
Assert(Status == STATUS_SUCCESS);
}
}
DECLCALLBACK(void) VBoxDispMpLoggerLog(const char *pszString)
{
VBoxDispMpLoggerLogN(pszString, strlen(pszString));
}
DECLCALLBACK(void) VBoxDispMpLoggerLogF(const char *pszFormat, ...)
{
/** @todo would make a whole lot more sense to just allocate
* VBOXDISPIFESCAPE_DBGPRINT here and printf into it's buffer than
* double buffering it like this */
char szBuffer[4096];
va_list va;
va_start(va, pszFormat);
#ifdef IPRT_NO_CRT
RTStrPrintf(szBuffer, sizeof(szBuffer), pszFormat, va);
#else
_vsnprintf(szBuffer, sizeof(szBuffer), pszFormat, va);
szBuffer[sizeof(szBuffer) - 1] = '\0'; /* Don't trust the _vsnprintf function terminate the string! */
#endif
va_end(va);
VBoxDispMpLoggerLog(szBuffer);
}
/* Interface used for backdoor logging. In no-CRT mode we will drag in IPRT
logging and it will be used on assertion in the no-CRT and IPRT code. */
VBGLR3DECL(int) VbglR3WriteLog(const char *pch, size_t cch)
{
VBoxDispMpLoggerLogN(pch, cch);
return VINF_SUCCESS;
}
/**
* Prefix the output string with exe name and pid/tid.
*/
#ifndef IPRT_NO_CRT
static const char *vboxUmLogGetExeName(void)
{
static int s_fModuleNameInited = 0;
static char s_szModuleName[MAX_PATH];
if (!s_fModuleNameInited)
{
const DWORD cchName = GetModuleFileNameA(NULL, s_szModuleName, RT_ELEMENTS(s_szModuleName));
if (cchName == 0)
return "<no module>";
s_fModuleNameInited = 1;
}
return &s_szModuleName[0];
}
#endif
DECLCALLBACK(void) VBoxWddmUmLog(const char *pszString)
{
/** @todo Allocate VBOXDISPIFESCAPE_DBGPRINT here and format right into it
* instead? That would be a lot more flexible and a little faster. */
char szBuffer[4096];
#ifdef IPRT_NO_CRT
/** @todo use RTProcShortName instead of RTProcExecutablePath? Will avoid
* chopping off log text if the executable path is too long. */
RTStrPrintf(szBuffer, sizeof(szBuffer), "['%s' 0x%lx.0x%lx]: %s",
RTProcExecutablePath() /* should've been initialized by nocrt-startup-dll-win.cpp already */,
GetCurrentProcessId(), GetCurrentThreadId(), pszString);
#else
int cch = _snprintf(szBuffer, sizeof(szBuffer), "['%s' 0x%lx.0x%lx]: %s",
vboxUmLogGetExeName(), GetCurrentProcessId(), GetCurrentThreadId(), pszString);
AssertReturnVoid(cch > 0); /* unlikely that we'll have string encoding problems, but just in case. */
szBuffer[sizeof(szBuffer) - 1] = '\0'; /* the function doesn't necessarily terminate the buffer on overflow. */
#endif
VBoxDispMpLoggerLog(szBuffer);
}
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