| 1 | /* $Id: exceptionsR3.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */
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| 2 | /** @file
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| 3 | * exceptionsR3 - Tests various ring-3 CPU exceptions.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2009-2019 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*********************************************************************************************************************************
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| 29 | * Header Files *
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| 30 | *********************************************************************************************************************************/
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| 31 | #include <iprt/cdefs.h>
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| 32 | #include <iprt/ctype.h>
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| 33 | #include <iprt/getopt.h>
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| 34 | #include <iprt/stream.h>
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| 35 | #include <iprt/string.h>
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| 36 | #include <iprt/test.h>
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| 37 | #include <iprt/x86.h>
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| 38 |
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| 39 | #include <setjmp.h>
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| 40 |
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| 41 | #ifndef RT_OS_WINDOWS
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| 42 | # define USE_SIGNALS
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| 43 | # include <signal.h>
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| 44 | # include <stdlib.h>
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| 45 | #endif
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| 46 |
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| 47 |
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| 48 | /*********************************************************************************************************************************
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| 49 | * Defined Constants And Macros *
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| 50 | *********************************************************************************************************************************/
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| 51 | /** Executes a simple test. */
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| 52 | #define TST_XCPT(Trapper, iTrap, uErr) \
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| 53 | do \
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| 54 | { \
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| 55 | RTTestISub(#Trapper); \
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| 56 | tstXcptReset(); \
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| 57 | if (!setjmp(g_JmpBuf)) \
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| 58 | { \
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| 59 | tstXcptAsm##Trapper(); \
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| 60 | RTTestIFailed("%s didn't trap (line no %u)", #Trapper, __LINE__); \
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| 61 | } \
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| 62 | else if ( (iTrap) != tstXcptCurTrap() \
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| 63 | || (uErr) != tstXcptCurErr() ) \
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| 64 | RTTestIFailed("%s trapped with %#x/%#x, expected %#x/%#x (line no %u)", \
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| 65 | #Trapper, tstXcptCurTrap(), tstXcptCurErr(), (iTrap), (uErr), __LINE__); \
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| 66 | else \
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| 67 | RTTestISubDone(); \
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| 68 | } while (0)
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| 69 |
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| 70 |
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| 71 | /*********************************************************************************************************************************
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| 72 | * Global Variables *
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| 73 | *********************************************************************************************************************************/
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| 74 | /** Where to longjmp to when getting a signal/exception. */
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| 75 | jmp_buf g_JmpBuf;
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| 76 | #ifdef USE_SIGNALS
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| 77 | /** Pending signal.
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| 78 | * -1 if no signal is pending. */
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| 79 | int32_t volatile g_iSignal;
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| 80 | /** Pending signal info. */
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| 81 | siginfo_t volatile g_SigInfo;
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| 82 | #endif
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| 83 |
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| 84 |
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| 85 | /*********************************************************************************************************************************
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| 86 | * Internal Functions *
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| 87 | *********************************************************************************************************************************/
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| 88 | DECLASM(void) tstXcptAsmNullPtrRead(void);
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| 89 | DECLASM(void) tstXcptAsmNullPtrWrite(void);
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| 90 | DECLASM(void) tstXcptAsmSysEnter(void);
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| 91 | DECLASM(void) tstXcptAsmSysCall(void);
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| 92 |
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| 93 |
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| 94 |
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| 95 | #ifdef USE_SIGNALS
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| 96 | /**
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| 97 | * Generic signal handler.
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| 98 | */
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| 99 | static void tstXcptSigHandler(int iSignal, siginfo_t *pSigInfo, void *pvCtx)
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| 100 | {
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| 101 | #if 1
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| 102 | RTStrmPrintf(g_pStdErr, "signal %d pSigInfo=%p pvCtx=%p", iSignal, pSigInfo, pvCtx);
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| 103 | if (pSigInfo)
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| 104 | RTStrmPrintf(g_pStdErr, " si_addr=%p si_code=%#x sival_ptr=%p sival_int=%d",
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| 105 | pSigInfo->si_addr, pSigInfo->si_code, pSigInfo->si_value.sival_ptr, pSigInfo->si_value.sival_int);
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| 106 | RTStrmPrintf(g_pStdErr, "\n");
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| 107 | #endif
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| 108 | if (g_iSignal == -1)
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| 109 | {
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| 110 | g_iSignal = iSignal;
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| 111 | if (pSigInfo)
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| 112 | memcpy((void *)&g_SigInfo, pSigInfo, sizeof(g_SigInfo));
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| 113 | longjmp(g_JmpBuf, 1);
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| 114 | }
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| 115 | else
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| 116 | {
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| 117 | /* we're up the infamous creek... */
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| 118 | _Exit(2);
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| 119 | }
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| 120 | }
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| 121 |
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| 122 | #elif defined(RT_OS_WINDOWS)
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| 123 | /** @todo */
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| 124 | //# error "PORTME"
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| 125 |
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| 126 | #else
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| 127 | # error "PORTME"
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| 128 | #endif
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| 129 |
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| 130 |
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| 131 | /** Reset the current exception state and get ready for a new trap. */
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| 132 | static void tstXcptReset(void)
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| 133 | {
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| 134 | #ifdef USE_SIGNALS
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| 135 | g_iSignal = -1;
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| 136 | memset((void *)&g_SigInfo, 0, sizeof(g_SigInfo));
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| 137 | #endif
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| 138 | }
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| 139 |
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| 140 |
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| 141 |
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| 142 | /** Get the current intel trap number. Returns -1 if none. */
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| 143 | static int tstXcptCurTrap(void)
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| 144 | {
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| 145 | #ifdef USE_SIGNALS
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| 146 | /** @todo this is just a quick sketch. */
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| 147 | switch (g_iSignal)
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| 148 | {
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| 149 | case SIGBUS:
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| 150 | # ifdef RT_OS_DARWIN
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| 151 | if (g_SigInfo.si_code == 2 /*KERN_PROTECTION_FAILURE*/)
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| 152 | return X86_XCPT_PF;
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| 153 | # endif
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| 154 | return X86_XCPT_GP;
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| 155 |
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| 156 | case SIGSEGV:
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| 157 | return X86_XCPT_GP;
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| 158 | }
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| 159 | #endif
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| 160 | return -1;
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| 161 | }
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| 162 |
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| 163 |
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| 164 | /** Get the exception error code if applicable. */
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| 165 | static uint32_t tstXcptCurErr(void)
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| 166 | {
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| 167 | #ifdef USE_SIGNALS
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| 168 | /** @todo this is just a quick sketch. */
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| 169 | switch (g_iSignal)
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| 170 | {
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| 171 | case SIGBUS:
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| 172 | # ifdef RT_OS_DARWIN
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| 173 | if (g_SigInfo.si_code == 2 /*KERN_PROTECTION_FAILURE*/)
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| 174 | return 0;
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| 175 | # endif
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| 176 | break;
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| 177 |
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| 178 | case SIGSEGV:
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| 179 | break;
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| 180 | }
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| 181 | #endif
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| 182 | return UINT32_MAX;
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| 183 | }
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| 184 |
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| 185 |
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| 186 | int main(int argc, char **argv)
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| 187 | {
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| 188 | /*
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| 189 | * Prolog.
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| 190 | */
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| 191 | RTTEST hTest;
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| 192 | int rc = RTTestInitAndCreate("exceptionsR3", &hTest);
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| 193 | if (rc)
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| 194 | return rc;
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| 195 |
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| 196 | /*
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| 197 | * Parse options.
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| 198 | */
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| 199 | bool volatile fRawMode = false;
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| 200 | static const RTGETOPTDEF s_aOptions[] =
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| 201 | {
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| 202 | { "--raw-mode", 'r', RTGETOPT_REQ_NOTHING },
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| 203 | };
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| 204 |
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| 205 | RTGETOPTUNION ValUnion;
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| 206 | RTGETOPTSTATE GetState;
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| 207 | RTGetOptInit(&GetState, argc, argv, s_aOptions, RT_ELEMENTS(s_aOptions), 1, 0);
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| 208 | while ((rc = RTGetOpt(&GetState, &ValUnion)))
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| 209 | {
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| 210 | switch (rc)
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| 211 | {
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| 212 | case 'r':
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| 213 | fRawMode = true;
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| 214 | break;
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| 215 |
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| 216 | default:
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| 217 | return RTGetOptPrintError(rc, &ValUnion);
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| 218 | }
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| 219 | }
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| 220 |
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| 221 | /*
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| 222 | * Test setup.
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| 223 | */
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| 224 | #ifdef USE_SIGNALS
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| 225 | struct sigaction Act;
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| 226 | RT_ZERO(Act);
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| 227 | Act.sa_sigaction = tstXcptSigHandler;
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| 228 | Act.sa_flags = SA_SIGINFO;
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| 229 | sigfillset(&Act.sa_mask);
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| 230 |
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| 231 | sigaction(SIGILL, &Act, NULL);
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| 232 | sigaction(SIGTRAP, &Act, NULL);
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| 233 | # ifdef SIGEMT
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| 234 | sigaction(SIGEMT, &Act, NULL);
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| 235 | # endif
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| 236 | sigaction(SIGFPE, &Act, NULL);
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| 237 | sigaction(SIGBUS, &Act, NULL);
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| 238 | sigaction(SIGSEGV, &Act, NULL);
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| 239 |
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| 240 | #else
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| 241 | /** @todo Implement this using structured exception handling on Windows and
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| 242 | * OS/2. */
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| 243 | #endif
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| 244 |
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| 245 | /*
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| 246 | * The tests.
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| 247 | */
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| 248 | RTTestBanner(hTest);
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| 249 | TST_XCPT(NullPtrRead, X86_XCPT_PF, 0);
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| 250 | TST_XCPT(NullPtrWrite, X86_XCPT_PF, 0);
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| 251 | if (fRawMode)
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| 252 | {
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| 253 | TST_XCPT(SysEnter, X86_XCPT_GP, 0);
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| 254 | TST_XCPT(SysCall, X86_XCPT_UD, 0);
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| 255 | }
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| 256 |
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| 257 | /*
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| 258 | * Epilog.
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| 259 | */
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| 260 | return RTTestSummaryAndDestroy(hTest);
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| 261 | }
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| 262 |
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