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/* $Id: tstDeviceSsmFuzz.cpp $ */
/** @file
* tstDeviceSsmFuzz - SSM fuzzing testcase.
*/
/*
* Copyright (C) 2020-2023 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
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP LOG_GROUP_DEFAULT /** @todo */
#include <VBox/types.h>
#include <iprt/errcore.h>
#include <iprt/mem.h>
#include <iprt/fuzz.h>
#include <iprt/time.h>
#include <iprt/string.h>
#include "tstDeviceBuiltin.h"
#include "tstDeviceCfg.h"
#include "tstDeviceInternal.h"
/*********************************************************************************************************************************
* Defined Constants And Macros *
*********************************************************************************************************************************/
/*********************************************************************************************************************************
* Structures and Typedefs *
*********************************************************************************************************************************/
static PCTSTDEVCFGITEM tstDevSsmFuzzGetCfgItem(PCTSTDEVCFGITEM paCfg, uint32_t cCfgItems, const char *pszName)
{
for (uint32_t i = 0; i < cCfgItems; i++)
{
if (!RTStrCmp(paCfg[i].pszKey, pszName))
return &paCfg[i];
}
return NULL;
}
static const char *tstDevSsmFuzzGetCfgString(PCTSTDEVCFGITEM paCfg, uint32_t cCfgItems, const char *pszName)
{
PCTSTDEVCFGITEM pCfgItem = tstDevSsmFuzzGetCfgItem(paCfg, cCfgItems, pszName);
if ( pCfgItem
&& pCfgItem->enmType == TSTDEVCFGITEMTYPE_STRING)
return pCfgItem->u.psz;
return NULL;
}
static uint64_t tstDevSsmFuzzGetCfgU64(PCTSTDEVCFGITEM paCfg, uint32_t cCfgItems, const char *pszName)
{
PCTSTDEVCFGITEM pCfgItem = tstDevSsmFuzzGetCfgItem(paCfg, cCfgItems, pszName);
if ( pCfgItem
&& pCfgItem->enmType == TSTDEVCFGITEMTYPE_INTEGER)
return (uint64_t)pCfgItem->u.i64;
return 0;
}
static uint32_t tstDevSsmFuzzGetCfgU32(PCTSTDEVCFGITEM paCfg, uint32_t cCfgItems, const char *pszName)
{
PCTSTDEVCFGITEM pCfgItem = tstDevSsmFuzzGetCfgItem(paCfg, cCfgItems, pszName);
if ( pCfgItem
&& pCfgItem->enmType == TSTDEVCFGITEMTYPE_INTEGER)
return (uint32_t)pCfgItem->u.i64;
return 0;
}
/**
* Entry point for the SSM fuzzer.
*
* @returns VBox status code.
* @param hDut The device under test.
* @param paCfg The testcase config.
* @param cCfgItems Number of config items.
*/
static DECLCALLBACK(int) tstDevSsmFuzzEntry(TSTDEVDUT hDut, PCTSTDEVCFGITEM paCfg, uint32_t cCfgItems)
{
RTFUZZCTX hFuzzCtx;
int rc = RTFuzzCtxCreate(&hFuzzCtx, RTFUZZCTXTYPE_BLOB);
if (RT_SUCCESS(rc))
{
RTFUZZCFG hFuzzCfg;
rc = RTFuzzCfgCreateFromFile(&hFuzzCfg, tstDevSsmFuzzGetCfgString(paCfg, cCfgItems, "CorpusPath"), NULL);
if (RT_SUCCESS(rc))
{
rc = RTFuzzCfgImport(hFuzzCfg, hFuzzCtx, RTFUZZCFG_IMPORT_F_DEFAULT);
RTFuzzCfgRelease(hFuzzCfg);
}
if (RT_SUCCESS(rc))
{
/* Create a new SSM handle to use. */
PSSMHANDLE pSsm = (PSSMHANDLE)RTMemAllocZ(sizeof(*pSsm));
if (RT_LIKELY(pSsm))
{
pSsm->pDut = hDut;
pSsm->pbSavedState = NULL;
pSsm->cbSavedState = 0;
pSsm->offDataBuffer = 0;
pSsm->uCurUnitVer = tstDevSsmFuzzGetCfgU32(paCfg, cCfgItems, "UnitVersion");
pSsm->rc = VINF_SUCCESS;
uint64_t cRuntimeMs = tstDevSsmFuzzGetCfgU64(paCfg, cCfgItems, "RuntimeSec") * RT_MS_1SEC_64;
uint64_t tsStart = RTTimeMilliTS();
uint64_t cFuzzedInputs = 0;
do
{
RTFUZZINPUT hFuzzInp;
rc = RTFuzzCtxInputGenerate(hFuzzCtx, &hFuzzInp);
if (RT_SUCCESS(rc))
{
void *pvBlob = NULL;
size_t cbBlob = 0;
rc = RTFuzzInputQueryBlobData(hFuzzInp, &pvBlob, &cbBlob);
if (RT_SUCCESS(rc))
{
pSsm->pbSavedState = (uint8_t *)pvBlob;
pSsm->cbSavedState = cbBlob;
pSsm->offDataBuffer = 0;
pSsm->rc = VINF_SUCCESS;
/* Get the SSM handler from the device. */
int rcDut = VINF_SUCCESS;
PTSTDEVDUTSSM pSsmClbks = RTListGetFirst(&hDut->LstSsmHandlers, TSTDEVDUTSSM, NdSsm);
if (pSsmClbks)
{
/* Load preparations. */
if (pSsmClbks->pfnLoadPrep)
rcDut = pSsmClbks->pfnLoadPrep(hDut->pDevIns, pSsm);
if (RT_SUCCESS(rcDut))
rcDut = pSsmClbks->pfnLoadExec(hDut->pDevIns, pSsm, pSsm->uCurUnitVer, SSM_PASS_FINAL);
cFuzzedInputs++;
}
if (RT_SUCCESS(rcDut))
RTFuzzInputAddToCtxCorpus(hFuzzInp);
}
RTFuzzInputRelease(hFuzzInp);
}
} while ( RT_SUCCESS(rc)
&& RTTimeMilliTS() - tsStart < cRuntimeMs);
RTMemFree(pSsm);
}
else
rc = VERR_NO_MEMORY;
}
RTFuzzCtxRelease(hFuzzCtx);
}
return rc;
}
const TSTDEVTESTCASEREG g_TestcaseSsmFuzz =
{
/** szName */
"SsmFuzz",
/** pszDesc */
"Fuzzes devices SSM state loaders",
/** fFlags */
0,
/** pfnTestEntry */
tstDevSsmFuzzEntry
};
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