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/* $Id: tstVMMR0CallHost-1.cpp $ */
/** @file
* Testcase for the VMMR0JMPBUF operations.
*/
/*
* Copyright (C) 2006-2007 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include <VBox/err.h>
#include <VBox/param.h>
#include <iprt/alloca.h>
#include <iprt/initterm.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"
/*******************************************************************************
* Defined Constants And Macros *
*******************************************************************************/
#if !defined(VMM_R0_SWITCH_STACK) && !defined(VMM_R0_NO_SWITCH_STACK)
# error "VMM_R0_SWITCH_STACK or VMM_R0_NO_SWITCH_STACK has to be defined."
#endif
/*******************************************************************************
* Global Variables *
*******************************************************************************/
/** The jump buffer. */
static VMMR0JMPBUF g_Jmp;
/** 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;
int foo(int i, int iZero, int iMinusOne)
{
/* 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, "");
#ifdef VMM_R0_SWITCH_STACK
g_cbFooUsed = VMM_STACK_SIZE - ((uintptr_t)pv - (uintptr_t)g_Jmp.pvSavedStack);
RTTESTI_CHECK_MSG_RET(g_cbFooUsed < (intptr_t)VMM_STACK_SIZE - 128, ("%#x - (%p - %p) -> %#x; cb=%#x i=%d\n", VMM_STACK_SIZE, pv, g_Jmp.pvSavedStack, g_cbFooUsed, cb, i), -15);
#elif 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
/* Do long jmps every 7th time */
if ((i % 7) == 0)
{
g_cJmps++;
int rc = vmmR0CallRing3LongJmp(&g_Jmp, 42);
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) == 0 ? 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;
}
void tst(int iFrom, int iTo, int iInc)
{
#ifdef VMM_R0_SWITCH_STACK
int const cIterations = iFrom > iTo ? iFrom - iTo : iTo - iFrom;
void *pvPrev = alloca(1);
#endif
RTR0PTR R0PtrSaved = g_Jmp.pvSavedStack;
RT_ZERO(g_Jmp);
g_Jmp.pvSavedStack = R0PtrSaved;
memset((void *)g_Jmp.pvSavedStack, '\0', VMM_STACK_SIZE);
g_cbFoo = 0;
g_cJmps = 0;
g_cbFooUsed = 0;
for (int i = iFrom, iItr = 0; i != iTo; i += iInc, iItr++)
{
int rc = vmmR0CallRing3SetJmp(&g_Jmp, (PFNVMMR0SETJMP)tst2, (PVM)i, 0);
RTTESTI_CHECK_MSG_RETV(rc == 0 || rc == 42, ("i=%d rc=%d setjmp; cbFoo=%#x cbFooUsed=%#x\n", i, rc, g_cbFoo, g_cbFooUsed));
#ifdef VMM_R0_SWITCH_STACK
/* Make the stack pointer slide for the second half of the calls. */
if (iItr >= cIterations / 2)
{
/* Note! gcc does funny rounding up of alloca(). */
void *pv2 = alloca((i % 63) | 1);
size_t cb2 = (uintptr_t)pvPrev - (uintptr_t)pv2;
RTTESTI_CHECK_MSG(cb2 >= 16 && cb2 <= 128, ("cb2=%zu pv2=%p pvPrev=%p iAlloca=%d\n", cb2, pv2, pvPrev, iItr));
memset(pv2, 0xff, cb2);
memset(pvPrev, 0xee, 1);
pvPrev = pv2;
}
#endif
}
RTTESTI_CHECK_MSG_RETV(g_cJmps, ("No jumps!"));
if (g_Jmp.cbUsedAvg || g_Jmp.cUsedTotal)
RTTestIPrintf(RTTESTLVL_ALWAYS, "cbUsedAvg=%#x cbUsedMax=%#x cUsedTotal=%#llx\n",
g_Jmp.cbUsedAvg, g_Jmp.cbUsedMax, g_Jmp.cUsedTotal);
}
int main()
{
/*
* Init.
*/
RTTEST hTest;
int rc;
if ( RT_FAILURE(rc = RTR3Init())
|| RT_FAILURE(rc = RTTestCreate("tstVMMR0CallHost-1", &hTest)))
{
RTStrmPrintf(g_pStdErr, "tstVMMR0CallHost-1: Fatal error during init: %Rrc\n", rc);
return 1;
}
RTTestBanner(hTest);
g_Jmp.pvSavedStack = (RTR0PTR)RTTestGuardedAllocTail(hTest, VMM_STACK_SIZE);
/*
* 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);
}
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