/**
* The guest library uses lazy initialization for VMMDev port and memory,
* because these values are provided by the VBoxGuest driver and it might
* be loaded later than other drivers.
*
* The VbglEnter checks the current library status, tries to retrieve these
* values and fails if they are unavailable.
*
*/
static void vbglQueryDriverInfo (void)
{
int rc = VINF_SUCCESS;
rc = RTSemMutexRequest(g_vbgldata.mutexDriverInit, RT_INDEFINITE_WAIT);
if (RT_FAILURE(rc))
return;
if (g_vbgldata.status == VbglStatusReady)
{
RTSemMutexRelease(g_vbgldata.mutexDriverInit);
return;
}
rc = vbglDriverOpen(&g_vbgldata.driver);
if (RT_SUCCESS(rc))
{
/*
* Try query the port info.
*/
VBoxGuestPortInfo port;
rc = vbglDriverIOCtl (&g_vbgldata.driver,
VBOXGUEST_IOCTL_GETVMMDEVPORT, &port,
sizeof (port));
if (RT_SUCCESS (rc))
{
dprintf (("port = 0x%04X, mem = %p\n", port.portAddress, port.pVMMDevMemory));
g_vbgldata.portVMMDev = (RTIOPORT)port.portAddress;
g_vbgldata.pVMMDevMemory = port.pVMMDevMemory;
g_vbgldata.status = VbglStatusReady;
vbglR0QueryHostVersion();
}
}
RTSemMutexRelease(g_vbgldata.mutexDriverInit);
dprintf (("vbglQueryDriverInfo rc = %d\n", rc));
}
int ThreadTest1(RTTHREAD ThreadSelf, void *pvUser)
{
uint64_t *pu64 = (uint64_t *)pvUser;
for (;;)
{
int rc = RTSemMutexRequestNoResume(g_hMutex, RT_INDEFINITE_WAIT);
if (RT_FAILURE(rc))
{
PrintError("%x: RTSemMutexRequestNoResume failed with %Rrc\n", rc);
break;
}
if (ASMAtomicIncU32(&g_cbConcurrent) != 1)
{
PrintError("g_cbConcurrent=%d after request!\n", g_cbConcurrent);
break;
}
/*
* Check for fairness: The values of the threads should not differ too much
*/
(*pu64)++;
/*
* Check for correctness: Give other threads a chance. If the implementation is
* correct, no other thread will be able to enter this lock now.
*/
if (g_fYield)
RTThreadYield();
if (ASMAtomicDecU32(&g_cbConcurrent) != 0)
{
PrintError("g_cbConcurrent=%d before release!\n", g_cbConcurrent);
break;
}
rc = RTSemMutexRelease(g_hMutex);
if (RT_FAILURE(rc))
{
PrintError("%x: RTSemMutexRelease failed with %Rrc\n", rc);
break;
}
if (g_fTerminate)
break;
}
if (!g_fQuiet)
RTPrintf("tstSemMutex: Thread %08x exited with %lld\n", ThreadSelf, *pu64);
return VINF_SUCCESS;
}
/**
* Service request callback function.
*
* @returns VBox status code.
* @param pSession The caller's session.
* @param u64Arg 64-bit integer argument.
* @param pReqHdr The request header. Input / Output. Optional.
*/
DECLEXPORT(int) TSTRTR0SemMutexSrvReqHandler(PSUPDRVSESSION pSession, uint32_t uOperation,
uint64_t u64Arg, PSUPR0SERVICEREQHDR pReqHdr)
{
NOREF(pSession);
if (!VALID_PTR(pReqHdr))
return VERR_INVALID_PARAMETER;
char *pszErr = (char *)(pReqHdr + 1);
size_t cchErr = pReqHdr->cbReq - sizeof(*pReqHdr);
if (cchErr < 32 || cchErr >= 0x10000)
return VERR_INVALID_PARAMETER;
*pszErr = '\0';
#define SET_ERROR(szFmt) do { if (!*pszErr) RTStrPrintf(pszErr, cchErr, "!" szFmt); } while (0)
#define SET_ERROR1(szFmt, a1) do { if (!*pszErr) RTStrPrintf(pszErr, cchErr, "!" szFmt, a1); } while (0)
#define SET_ERROR2(szFmt, a1, a2) do { if (!*pszErr) RTStrPrintf(pszErr, cchErr, "!" szFmt, a1, a2); } while (0)
#define SET_ERROR3(szFmt, a1, a2, a3) do { if (!*pszErr) RTStrPrintf(pszErr, cchErr, "!" szFmt, a1, a2, a3); } while (0)
#define CHECK_RC_BREAK(rc, rcExpect, szOp) \
if ((rc) != (rcExpect)) \
{ \
RTStrPrintf(pszErr, cchErr, "!%s -> %Rrc, expected %Rrc. line %u", szOp, rc, rcExpect, __LINE__); \
SUPR0Printf("%s -> %d, expected %d. line %u", szOp, rc, rcExpect, __LINE__); \
break; \
}
/*
* Set up test timeout (when applicable).
*/
if (u64Arg > 120)
{
SET_ERROR1("Timeout is too large (max 120): %lld", u64Arg);
return VINF_SUCCESS;
}
uint64_t const StartTS = RTTimeSystemMilliTS();
uint32_t const cMsMax = (uint32_t)u64Arg * 1000;
/*
* The big switch.
*/
RTSEMMUTEX hMtx;
int rc;
switch (uOperation)
{
case TSTRTR0SEMMUTEX_SANITY_OK:
break;
case TSTRTR0SEMMUTEX_SANITY_FAILURE:
SET_ERROR1("42failure42%1024s", "");
break;
case TSTRTR0SEMMUTEX_BASIC:
rc = RTSemMutexCreate(&hMtx);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexCreate");
do
{
/*
* The interruptible version first.
*/
/* simple request and release, polling. */
rc = RTSemMutexRequestNoResume(hMtx, 0);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRequestNoResume");
rc = RTSemMutexRelease(hMtx);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRelease");
/* simple request and release, wait for ever. */
rc = RTSemMutexRequestNoResume(hMtx, RT_INDEFINITE_WAIT);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRequestNoResume(indef_wait)");
rc = RTSemMutexRelease(hMtx);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRelease");
/* simple request and release, wait a tiny while. */
rc = RTSemMutexRequestNoResume(hMtx, 133);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRequestNoResume(133)");
rc = RTSemMutexRelease(hMtx);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRelease");
/* nested request and release. */
rc = RTSemMutexRequestNoResume(hMtx, RT_INDEFINITE_WAIT);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRequestNoResume#1");
rc = RTSemMutexRequestNoResume(hMtx, RT_INDEFINITE_WAIT);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRequestNoResume#2");
rc = RTSemMutexRequestNoResume(hMtx, RT_INDEFINITE_WAIT);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRequestNoResume#3");
rc = RTSemMutexRelease(hMtx);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRelease#3");
rc = RTSemMutexRequestNoResume(hMtx, RT_INDEFINITE_WAIT);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRequestNoResume#3b");
rc = RTSemMutexRelease(hMtx);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRelease#3b");
rc = RTSemMutexRelease(hMtx);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRelease#2");
rc = RTSemMutexRelease(hMtx);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRelease#1");
/*
* The uninterruptible variant.
*/
/* simple request and release, polling. */
rc = RTSemMutexRequest(hMtx, 0);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRequest");
rc = RTSemMutexRelease(hMtx);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRelease");
/* simple request and release, wait for ever. */
rc = RTSemMutexRequest(hMtx, RT_INDEFINITE_WAIT);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRequest(indef_wait)");
rc = RTSemMutexRelease(hMtx);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRelease");
/* simple request and release, wait a tiny while. */
rc = RTSemMutexRequest(hMtx, 133);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRequest(133)");
rc = RTSemMutexRelease(hMtx);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRelease");
/* nested request and release. */
rc = RTSemMutexRequest(hMtx, RT_INDEFINITE_WAIT);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRequest#1");
rc = RTSemMutexRequest(hMtx, RT_INDEFINITE_WAIT);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRequest#2");
rc = RTSemMutexRequest(hMtx, RT_INDEFINITE_WAIT);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRequest#3");
rc = RTSemMutexRelease(hMtx);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRelease#3");
rc = RTSemMutexRequest(hMtx, RT_INDEFINITE_WAIT);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRequest#3b");
rc = RTSemMutexRelease(hMtx);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRelease#3b");
rc = RTSemMutexRelease(hMtx);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRelease#2");
rc = RTSemMutexRelease(hMtx);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRelease#1");
} while (false);
rc = RTSemMutexDestroy(hMtx);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexDestroy");
break;
case TSTRTR0SEMMUTEX_TEST2_SETUP:
case TSTRTR0SEMMUTEX_TEST3_SETUP:
case TSTRTR0SEMMUTEX_TEST4_SETUP:
rc = RTSemMutexCreate(&g_hMtxTest2);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexCreate");
break;
case TSTRTR0SEMMUTEX_TEST2_DO:
for (unsigned i = 0; i < 200; i++)
{
if (i & 1)
{
rc = RTSemMutexRequestNoResume(g_hMtxTest2, RT_INDEFINITE_WAIT);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRequestNoResume(,indef_wait)");
}
else
{
rc = RTSemMutexRequestNoResume(g_hMtxTest2, 30000);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRequestNoResume(,30000)");
}
RTThreadSleep(1);
rc = RTSemMutexRelease(g_hMtxTest2);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRelease");
if ((i % 16) == 15 && RTTimeSystemMilliTS() - StartTS >= cMsMax)
break;
}
break;
case TSTRTR0SEMMUTEX_TEST3_DO:
for (unsigned i = 0; i < 1000000; i++)
{
if (i & 1)
{
rc = RTSemMutexRequestNoResume(g_hMtxTest2, RT_INDEFINITE_WAIT);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRequestNoResume(,indef_wait)");
}
else
{
rc = RTSemMutexRequestNoResume(g_hMtxTest2, 30000);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRequestNoResume(,30000)");
}
rc = RTSemMutexRelease(g_hMtxTest2);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRelease");
if ((i % 256) == 255 && RTTimeSystemMilliTS() - StartTS >= cMsMax)
break;
}
break;
case TSTRTR0SEMMUTEX_TEST4_DO:
for (unsigned i = 0; i < 1024; i++)
{
rc = RTSemMutexRequestNoResume(g_hMtxTest2, (i % 32));
if (rc != VERR_TIMEOUT)
{
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRequestNoResume");
RTThreadSleep(1000);
rc = RTSemMutexRelease(g_hMtxTest2);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexRelease");
}
if (RTTimeSystemMilliTS() - StartTS >= cMsMax)
break;
}
break;
case TSTRTR0SEMMUTEX_TEST2_CLEANUP:
case TSTRTR0SEMMUTEX_TEST3_CLEANUP:
case TSTRTR0SEMMUTEX_TEST4_CLEANUP:
rc = RTSemMutexDestroy(g_hMtxTest2);
CHECK_RC_BREAK(rc, VINF_SUCCESS, "RTSemMutexCreate");
g_hMtxTest2 = NIL_RTSEMMUTEX;
break;
default:
SET_ERROR1("Unknown test #%d", uOperation);
break;
}
/* The error indicator is the '!' in the message buffer. */
return VINF_SUCCESS;
}
static int Test1(unsigned cThreads, unsigned cSeconds, bool fYield, bool fQuiet)
{
int rc;
unsigned i;
uint64_t g_au64[32];
RTTHREAD aThreads[RT_ELEMENTS(g_au64)];
AssertRelease(cThreads <= RT_ELEMENTS(g_au64));
/*
* Init globals.
*/
g_fYield = fYield;
g_fQuiet = fQuiet;
g_fTerminate = false;
rc = RTSemMutexCreate(&g_hMutex);
if (RT_FAILURE(rc))
return PrintError("RTSemMutexCreate failed (rc=%Rrc)\n", rc);
/*
* Create the threads and let them block on the mutex.
*/
rc = RTSemMutexRequest(g_hMutex, RT_INDEFINITE_WAIT);
if (RT_FAILURE(rc))
return PrintError("RTSemMutexRequest failed (rc=%Rrc)\n", rc);
for (i = 0; i < cThreads; i++)
{
g_au64[i] = 0;
rc = RTThreadCreate(&aThreads[i], ThreadTest1, &g_au64[i], 0, RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE, "test");
if (RT_FAILURE(rc))
return PrintError("RTThreadCreate failed for thread %u (rc=%Rrc)\n", i, rc);
}
if (!fQuiet)
RTPrintf("tstSemMutex: %zu Threads created. Racing them for %u seconds (%s) ...\n",
cThreads, cSeconds, g_fYield ? "yielding" : "no yielding");
uint64_t u64StartTS = RTTimeNanoTS();
rc = RTSemMutexRelease(g_hMutex);
if (RT_FAILURE(rc))
PrintError("RTSemMutexRelease failed (rc=%Rrc)\n", rc);
RTThreadSleep(cSeconds * 1000);
ASMAtomicXchgBool(&g_fTerminate, true);
uint64_t ElapsedNS = RTTimeNanoTS() - u64StartTS;
for (i = 0; i < cThreads; i++)
{
rc = RTThreadWait(aThreads[i], 5000, NULL);
if (RT_FAILURE(rc))
PrintError("RTThreadWait failed for thread %u (rc=%Rrc)\n", i, rc);
}
rc = RTSemMutexDestroy(g_hMutex);
if (RT_FAILURE(rc))
PrintError("RTSemMutexDestroy failed - %Rrc\n", rc);
g_hMutex = NIL_RTSEMMUTEX;
if (g_cErrors)
RTThreadSleep(100);
/*
* Collect and display the results.
*/
uint64_t Total = g_au64[0];
for (i = 1; i < cThreads; i++)
Total += g_au64[i];
uint64_t Normal = Total / cThreads;
uint64_t MaxDeviation = 0;
for (i = 0; i < cThreads; i++)
{
uint64_t Delta = RT_ABS((int64_t)(g_au64[i] - Normal));
if (Delta > Normal / 2)
RTPrintf("tstSemMutex: Warning! Thread %d deviates by more than 50%% - %llu (it) vs. %llu (avg)\n",
i, g_au64[i], Normal);
if (Delta > MaxDeviation)
MaxDeviation = Delta;
}
RTPrintf("tstSemMutex: Threads: %u Total: %llu Per Sec: %llu Avg: %llu ns Max dev: %llu%%\n",
cThreads,
Total,
Total / cSeconds,
ElapsedNS / Total,
MaxDeviation * 100 / Normal
);
return 0;
}