diff options
Diffstat (limited to 'src/VBox/VMM/testcase/tstVMMR0CallHost-1.cpp')
| -rw-r--r-- | src/VBox/VMM/testcase/tstVMMR0CallHost-1.cpp | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/src/VBox/VMM/testcase/tstVMMR0CallHost-1.cpp b/src/VBox/VMM/testcase/tstVMMR0CallHost-1.cpp new file mode 100644 index 00000000..b271c560 --- /dev/null +++ b/src/VBox/VMM/testcase/tstVMMR0CallHost-1.cpp @@ -0,0 +1,170 @@ +/* $Id: tstVMMR0CallHost-1.cpp $ */ +/** @file + * Testcase for the VMMR0JMPBUF operations. + */ + +/* + * Copyright (C) 2006-2022 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 + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include <iprt/errcore.h> +#include <VBox/param.h> +#include <iprt/alloca.h> +#include <iprt/initterm.h> +#include <iprt/rand.h> +#include <iprt/string.h> +#include <iprt/stream.h> +#include <iprt/test.h> + +#define IN_VMM_R0 +#define IN_RING0 /* pretent we're in Ring-0 to get the prototypes. */ +#include <VBox/vmm/vmm.h> +#include "VMMInternal.h" + + +/********************************************************************************************************************************* +* Global Variables * +*********************************************************************************************************************************/ +/** The jump buffer. */ +static VMMR0JMPBUF g_Jmp; +/** The mirror jump buffer. */ +static VMMR0JMPBUF g_JmpMirror; +/** The number of jumps we've done. */ +static unsigned volatile g_cJmps; +/** Number of bytes allocated last time we called foo(). */ +static size_t volatile g_cbFoo; +/** Number of bytes used last time we called foo(). */ +static intptr_t volatile g_cbFooUsed; +/** Set if we're in a long jump. */ +static bool g_fInLongJmp; + + +int foo(int i, int iZero, int iMinusOne) +{ + NOREF(iZero); + + /* allocate a buffer which we fill up to the end. */ + size_t cb = (i % 1555) + 32; + g_cbFoo = cb; + char *pv = (char *)alloca(cb); + RTStrPrintf(pv, cb, "i=%d%*s\n", i, cb, ""); +#if defined(RT_ARCH_AMD64) + g_cbFooUsed = (uintptr_t)g_Jmp.rsp - (uintptr_t)pv; + RTTESTI_CHECK_MSG_RET(g_cbFooUsed < VMM_STACK_SIZE - 128, ("%p - %p -> %#x; cb=%#x i=%d\n", g_Jmp.rsp, pv, g_cbFooUsed, cb, i), -15); +#elif defined(RT_ARCH_X86) + g_cbFooUsed = (uintptr_t)g_Jmp.esp - (uintptr_t)pv; + RTTESTI_CHECK_MSG_RET(g_cbFooUsed < (intptr_t)VMM_STACK_SIZE - 128, ("%p - %p -> %#x; cb=%#x i=%d\n", g_Jmp.esp, pv, g_cbFooUsed, cb, i), -15); +#endif + + /* Twice in a row, every 7th time. */ + if ((i % 7) <= 1) + { + g_cJmps++; + g_fInLongJmp = true; + int rc = vmmR0CallRing3LongJmp(&g_Jmp, 42); + g_fInLongJmp = false; + if (!rc) + return i + 10000; + return -1; + } + NOREF(iMinusOne); + return i; +} + + +DECLCALLBACK(int) tst2(intptr_t i, intptr_t i2) +{ + RTTESTI_CHECK_MSG_RET(i >= 0 && i <= 8192, ("i=%d is out of range [0..8192]\n", i), 1); + RTTESTI_CHECK_MSG_RET(i2 == 0, ("i2=%d is out of range [0]\n", i2), 1); + int iExpect = (i % 7) <= 1 ? i + 10000 : i; + int rc = foo(i, 0, -1); + RTTESTI_CHECK_MSG_RET(rc == iExpect, ("i=%d rc=%d expected=%d\n", i, rc, iExpect), 1); + return 0; +} + + +DECLCALLBACK(DECL_NO_INLINE(RT_NOTHING, int)) stackRandom(PVMMR0JMPBUF pJmpBuf, PFNVMMR0SETJMP pfn, PVM pVM, PVMCPU pVCpu) +{ +#ifdef RT_ARCH_AMD64 + uint32_t cbRand = RTRandU32Ex(1, 96); +#else + uint32_t cbRand = 1; +#endif + uint8_t volatile *pabFuzz = (uint8_t volatile *)alloca(cbRand); + memset((void *)pabFuzz, 0xfa, cbRand); + int rc = vmmR0CallRing3SetJmp(pJmpBuf, pfn, pVM, pVCpu); + memset((void *)pabFuzz, 0xaf, cbRand); + return rc; +} + + +void tst(int iFrom, int iTo, int iInc) +{ + RT_BZERO(&g_Jmp, RT_UOFFSETOF(VMMR0JMPBUF, cbStackBuf)); + g_Jmp.cbStackValid = _1M; + memset((void *)g_Jmp.pvStackBuf, '\0', g_Jmp.cbStackBuf); + g_cbFoo = 0; + g_cJmps = 0; + g_cbFooUsed = 0; + g_fInLongJmp = false; + + for (int i = iFrom, iItr = 0; i != iTo; i += iInc, iItr++) + { + g_fInLongJmp = false; + int rc = stackRandom(&g_Jmp, (PFNVMMR0SETJMP)(uintptr_t)tst2, (PVM)(uintptr_t)i, 0); + RTTESTI_CHECK_MSG_RETV(rc == (g_fInLongJmp ? 42 : 0), + ("i=%d rc=%d setjmp; cbFoo=%#x cbFooUsed=%#x fInLongJmp=%d\n", + i, rc, g_cbFoo, g_cbFooUsed, g_fInLongJmp)); + + } + RTTESTI_CHECK_MSG_RETV(g_cJmps, ("No jumps!")); +} + + +int main() +{ + /* + * Init. + */ + RTTEST hTest; + RTEXITCODE rcExit = RTTestInitAndCreate("tstVMMR0CallHost-1", &hTest); + if (rcExit != RTEXITCODE_SUCCESS) + return rcExit; + RTTestBanner(hTest); + + g_Jmp.cbStackBuf = HOST_PAGE_SIZE; + g_Jmp.pvStackBuf = (uintptr_t)RTTestGuardedAllocTail(hTest, g_Jmp.cbStackBuf); + g_Jmp.pMirrorBuf = (uintptr_t)&g_JmpMirror; + + /* + * Run two test with about 1000 long jumps each. + */ + RTTestSub(hTest, "Increasing stack usage"); + tst(0, 7000, 1); + RTTestSub(hTest, "Decreasing stack usage"); + tst(7599, 0, -1); + + return RTTestSummaryAndDestroy(hTest); +} |