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/* $Id: exceptionsR3.cpp $ */
/** @file
* exceptionsR3 - Tests various ring-3 CPU exceptions.
*/
/*
* Copyright (C) 2009-2023 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>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <iprt/cdefs.h>
#include <iprt/ctype.h>
#include <iprt/getopt.h>
#include <iprt/stream.h>
#include <iprt/string.h>
#include <iprt/test.h>
#include <iprt/x86.h>
#include <setjmp.h>
#ifndef RT_OS_WINDOWS
# define USE_SIGNALS
# include <signal.h>
# include <stdlib.h>
#endif
/*********************************************************************************************************************************
* Defined Constants And Macros *
*********************************************************************************************************************************/
/** Executes a simple test. */
#define TST_XCPT(Trapper, iTrap, uErr) \
do \
{ \
RTTestISub(#Trapper); \
tstXcptReset(); \
if (!setjmp(g_JmpBuf)) \
{ \
tstXcptAsm##Trapper(); \
RTTestIFailed("%s didn't trap (line no %u)", #Trapper, __LINE__); \
} \
else if ( (iTrap) != tstXcptCurTrap() \
|| (uErr) != tstXcptCurErr() ) \
RTTestIFailed("%s trapped with %#x/%#x, expected %#x/%#x (line no %u)", \
#Trapper, tstXcptCurTrap(), tstXcptCurErr(), (iTrap), (uErr), __LINE__); \
else \
RTTestISubDone(); \
} while (0)
/*********************************************************************************************************************************
* Global Variables *
*********************************************************************************************************************************/
/** Where to longjmp to when getting a signal/exception. */
jmp_buf g_JmpBuf;
#ifdef USE_SIGNALS
/** Pending signal.
* -1 if no signal is pending. */
int32_t volatile g_iSignal;
/** Pending signal info. */
siginfo_t volatile g_SigInfo;
#endif
/*********************************************************************************************************************************
* Internal Functions *
*********************************************************************************************************************************/
DECLASM(void) tstXcptAsmNullPtrRead(void);
DECLASM(void) tstXcptAsmNullPtrWrite(void);
DECLASM(void) tstXcptAsmSysEnter(void);
DECLASM(void) tstXcptAsmSysCall(void);
#ifdef USE_SIGNALS
/**
* Generic signal handler.
*/
static void tstXcptSigHandler(int iSignal, siginfo_t *pSigInfo, void *pvCtx)
{
#if 1
RTStrmPrintf(g_pStdErr, "signal %d pSigInfo=%p pvCtx=%p", iSignal, pSigInfo, pvCtx);
if (pSigInfo)
RTStrmPrintf(g_pStdErr, " si_addr=%p si_code=%#x sival_ptr=%p sival_int=%d",
pSigInfo->si_addr, pSigInfo->si_code, pSigInfo->si_value.sival_ptr, pSigInfo->si_value.sival_int);
RTStrmPrintf(g_pStdErr, "\n");
#endif
if (g_iSignal == -1)
{
g_iSignal = iSignal;
if (pSigInfo)
memcpy((void *)&g_SigInfo, pSigInfo, sizeof(g_SigInfo));
longjmp(g_JmpBuf, 1);
}
else
{
/* we're up the infamous creek... */
_Exit(2);
}
}
#elif defined(RT_OS_WINDOWS)
/** @todo */
//# error "PORTME"
#else
# error "PORTME"
#endif
/** Reset the current exception state and get ready for a new trap. */
static void tstXcptReset(void)
{
#ifdef USE_SIGNALS
g_iSignal = -1;
memset((void *)&g_SigInfo, 0, sizeof(g_SigInfo));
#endif
}
/** Get the current intel trap number. Returns -1 if none. */
static int tstXcptCurTrap(void)
{
#ifdef USE_SIGNALS
/** @todo this is just a quick sketch. */
switch (g_iSignal)
{
case SIGBUS:
# ifdef RT_OS_DARWIN
if (g_SigInfo.si_code == 2 /*KERN_PROTECTION_FAILURE*/)
return X86_XCPT_PF;
# endif
return X86_XCPT_GP;
case SIGSEGV:
return X86_XCPT_GP;
}
#endif
return -1;
}
/** Get the exception error code if applicable. */
static uint32_t tstXcptCurErr(void)
{
#ifdef USE_SIGNALS
/** @todo this is just a quick sketch. */
switch (g_iSignal)
{
case SIGBUS:
# ifdef RT_OS_DARWIN
if (g_SigInfo.si_code == 2 /*KERN_PROTECTION_FAILURE*/)
return 0;
# endif
break;
case SIGSEGV:
break;
}
#endif
return UINT32_MAX;
}
int main(int argc, char **argv)
{
/*
* Prolog.
*/
RTTEST hTest;
int rc = RTTestInitAndCreate("exceptionsR3", &hTest);
if (rc)
return rc;
/*
* Parse options.
*/
bool volatile fRawMode = false;
static const RTGETOPTDEF s_aOptions[] =
{
{ "--raw-mode", 'r', RTGETOPT_REQ_NOTHING },
};
RTGETOPTUNION ValUnion;
RTGETOPTSTATE GetState;
RTGetOptInit(&GetState, argc, argv, s_aOptions, RT_ELEMENTS(s_aOptions), 1, 0);
while ((rc = RTGetOpt(&GetState, &ValUnion)))
{
switch (rc)
{
case 'r':
fRawMode = true;
break;
default:
return RTGetOptPrintError(rc, &ValUnion);
}
}
/*
* Test setup.
*/
#ifdef USE_SIGNALS
struct sigaction Act;
RT_ZERO(Act);
Act.sa_sigaction = tstXcptSigHandler;
Act.sa_flags = SA_SIGINFO;
sigfillset(&Act.sa_mask);
sigaction(SIGILL, &Act, NULL);
sigaction(SIGTRAP, &Act, NULL);
# ifdef SIGEMT
sigaction(SIGEMT, &Act, NULL);
# endif
sigaction(SIGFPE, &Act, NULL);
sigaction(SIGBUS, &Act, NULL);
sigaction(SIGSEGV, &Act, NULL);
#else
/** @todo Implement this using structured exception handling on Windows and
* OS/2. */
#endif
/*
* The tests.
*/
RTTestBanner(hTest);
TST_XCPT(NullPtrRead, X86_XCPT_PF, 0);
TST_XCPT(NullPtrWrite, X86_XCPT_PF, 0);
if (fRawMode)
{
TST_XCPT(SysEnter, X86_XCPT_GP, 0);
TST_XCPT(SysCall, X86_XCPT_UD, 0);
}
/*
* Epilog.
*/
return RTTestSummaryAndDestroy(hTest);
}
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