RTDECL(int) RTSemEventDestroy(RTSEMEVENT hEventSem)
{
IPRT_LINUX_SAVE_EFL_AC();
/*
* Validate input.
*/
PRTSEMEVENTINTERNAL pThis = hEventSem;
if (pThis == NIL_RTSEMEVENT)
return VINF_SUCCESS;
AssertMsgReturn(pThis->u32Magic == RTSEMEVENT_MAGIC, ("pThis->u32Magic=%RX32 pThis=%p\n", pThis->u32Magic, pThis), VERR_INVALID_HANDLE);
Assert(pThis->cRefs > 0);
/*
* Invalidate it and signal the object just in case.
*/
ASMAtomicWriteU32(&pThis->u32Magic, ~RTSEMEVENT_MAGIC);
ASMAtomicWriteU32(&pThis->fState, 0);
Assert(!waitqueue_active(&pThis->Head));
wake_up_all(&pThis->Head);
rtR0SemEventLnxRelease(pThis);
IPRT_LINUX_RESTORE_EFL_AC();
return VINF_SUCCESS;
}
/**
* Records a invlpg instruction for replaying upon REM entry.
*
* @param pVM Pointer to the VM.
* @param GCPtrPage The
*/
VMMDECL(void) REMNotifyInvalidatePage(PVM pVM, RTGCPTR GCPtrPage)
{
/*
* Try take the REM lock and push the address onto the array.
*/
if ( pVM->rem.s.cInvalidatedPages < RT_ELEMENTS(pVM->rem.s.aGCPtrInvalidatedPages)
&& EMRemTryLock(pVM) == VINF_SUCCESS)
{
uint32_t iPage = pVM->rem.s.cInvalidatedPages;
if (iPage < RT_ELEMENTS(pVM->rem.s.aGCPtrInvalidatedPages))
{
ASMAtomicWriteU32(&pVM->rem.s.cInvalidatedPages, iPage + 1);
pVM->rem.s.aGCPtrInvalidatedPages[iPage] = GCPtrPage;
EMRemUnlock(pVM);
return;
}
CPUMSetChangedFlags(VMMGetCpu(pVM), CPUM_CHANGED_GLOBAL_TLB_FLUSH); /** @todo this array should be per-cpu technically speaking. */
ASMAtomicWriteU32(&pVM->rem.s.cInvalidatedPages, 0); /** @todo leave this alone? Optimize this code? */
EMRemUnlock(pVM);
}
else
{
/* Fallback: Simply tell the recompiler to flush its TLB. */
CPUMSetChangedFlags(VMMGetCpu(pVM), CPUM_CHANGED_GLOBAL_TLB_FLUSH);
ASMAtomicWriteU32(&pVM->rem.s.cInvalidatedPages, 0); /** @todo leave this alone?! Optimize this code? */
}
return;
}
int vboxNetAdpCreate(PVBOXNETADP *ppNew, const char *pcszName)
{
int rc;
unsigned i;
for (i = 0; i < RT_ELEMENTS(g_aAdapters); i++)
{
PVBOXNETADP pThis = &g_aAdapters[i];
if (ASMAtomicCmpXchgU32((uint32_t volatile *)&pThis->enmState, kVBoxNetAdpState_Transitional, kVBoxNetAdpState_Invalid))
{
RTMAC Mac;
/* Found an empty slot -- use it. */
Log(("vboxNetAdpCreate: found empty slot: %d\n", i));
if (pcszName)
{
Log(("vboxNetAdpCreate: using name: %s\n", pcszName));
pThis->iUnit = vboxNetAdpGetUnitByName(pcszName);
strncpy(pThis->szName, pcszName, sizeof(pThis->szName));
pThis->szName[sizeof(pThis->szName) - 1] = '\0';
}
else
{
pThis->iUnit = vboxNetAdpGetNextAvailableUnit();
pThis->szName[0] = '\0';
}
if (pThis->iUnit < 0)
rc = VERR_INVALID_PARAMETER;
else
{
vboxNetAdpComposeMACAddress(pThis, &Mac);
rc = vboxNetAdpOsCreate(pThis, &Mac);
Log(("vboxNetAdpCreate: pThis=%p pThis->iUnit=%d, pThis->szName=%s\n",
pThis, pThis->iUnit, pThis->szName));
}
if (RT_SUCCESS(rc))
{
*ppNew = pThis;
ASMAtomicWriteU32((uint32_t volatile *)&pThis->enmState, kVBoxNetAdpState_Active);
Log2(("VBoxNetAdpCreate: Created %s\n", g_aAdapters[i].szName));
}
else
{
ASMAtomicWriteU32((uint32_t volatile *)&pThis->enmState, kVBoxNetAdpState_Invalid);
Log(("vboxNetAdpCreate: vboxNetAdpOsCreate failed with '%Rrc'.\n", rc));
}
for (i = 0; i < RT_ELEMENTS(g_aAdapters); i++)
Log2(("VBoxNetAdpCreate: Scanning entry: state=%d unit=%d name=%s\n",
g_aAdapters[i].enmState, g_aAdapters[i].iUnit, g_aAdapters[i].szName));
return rc;
}
}
Log(("vboxNetAdpCreate: no empty slots!\n"));
/* All slots in adapter array are busy. */
return VERR_OUT_OF_RESOURCES;
}
RTDECL(void) RTSpinlockRelease(RTSPINLOCK Spinlock)
{
PRTSPINLOCKINTERNAL pThis = (PRTSPINLOCKINTERNAL)Spinlock;
AssertMsg(pThis && pThis->u32Magic == RTSPINLOCK_MAGIC, ("magic=%#x\n", pThis->u32Magic));
KIRQL SavedIrql = pThis->SavedIrql;
if (pThis->fFlags & RTSPINLOCK_FLAGS_INTERRUPT_SAFE)
{
RTCCUINTREG fIntSaved = pThis->fIntSaved;
pThis->fIntSaved = 0;
#ifndef RTSPINLOCK_NT_HACK_NOIRQ
KeReleaseSpinLock(&pThis->Spinlock, SavedIrql);
ASMSetFlags(fIntSaved);
#else
Assert(pThis->u32Hack == RTSPINLOCK_NT_HACK_NOIRQ_TAKEN);
ASMAtomicWriteU32(&pThis->u32Hack, RTSPINLOCK_NT_HACK_NOIRQ_FREE);
ASMSetFlags(fIntSaved);
if (SavedIrql < DISPATCH_LEVEL)
KeLowerIrql(SavedIrql);
#endif
}
else
KeReleaseSpinLock(&pThis->Spinlock, SavedIrql);
}
RTDECL(int) RTSemEventMultiSignal(RTSEMEVENTMULTI hEventMultiSem)
{
PRTSEMEVENTMULTIINTERNAL pThis = (PRTSEMEVENTMULTIINTERNAL)hEventMultiSem;
RT_ASSERT_PREEMPT_CPUID_VAR();
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
AssertMsgReturn(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC,
("pThis=%p u32Magic=%#x\n", pThis, pThis->u32Magic),
VERR_INVALID_HANDLE);
RT_ASSERT_INTS_ON();
rtR0SemEventMultiSolRetain(pThis);
rtR0SemSolWaitEnterMutexWithUnpinningHack(&pThis->Mtx);
Assert(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC);
/*
* Do the job.
*/
uint32_t fNew = ASMAtomicUoReadU32(&pThis->fStateAndGen);
fNew += 1 << RTSEMEVENTMULTISOL_GEN_SHIFT;
fNew |= RTSEMEVENTMULTISOL_STATE_MASK;
ASMAtomicWriteU32(&pThis->fStateAndGen, fNew);
cv_broadcast(&pThis->Cnd);
mutex_exit(&pThis->Mtx);
rtR0SemEventMultiSolRelease(pThis);
RT_ASSERT_PREEMPT_CPUID();
return VINF_SUCCESS;
}
RTDECL(int) RTSemSpinMutexDestroy(RTSEMSPINMUTEX hSpinMtx)
{
RTSEMSPINMUTEXINTERNAL *pThis;
RTSEMEVENT hEventSem;
int rc;
if (hSpinMtx == NIL_RTSEMSPINMUTEX)
return VINF_SUCCESS;
pThis = hSpinMtx;
RTSEMSPINMUTEX_VALIDATE_RETURN(pThis);
/* No destruction races allowed! */
AssertMsg( pThis->cLockers == 0
&& pThis->hOwner == NIL_RTNATIVETHREAD,
("pThis=%p cLockers=%d hOwner=%p\n", pThis, pThis->cLockers, pThis->hOwner));
/*
* Invalidate the structure, free the mutex and free the structure.
*/
ASMAtomicWriteU32(&pThis->u32Magic, RTSEMSPINMUTEX_MAGIC_DEAD);
hEventSem = pThis->hEventSem;
pThis->hEventSem = NIL_RTSEMEVENT;
rc = RTSemEventDestroy(hEventSem); AssertRC(rc);
RTMemFree(pThis);
return rc;
}
RTDECL(int) RTSemEventMultiSignal(RTSEMEVENTMULTI hEventMultiSem)
{
PRTSEMEVENTMULTIINTERNAL pThis = (PRTSEMEVENTMULTIINTERNAL)hEventMultiSem;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
AssertMsgReturn(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC, ("pThis=%p u32Magic=%#x\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
RT_ASSERT_PREEMPT_CPUID_VAR();
RT_ASSERT_INTS_ON();
rtR0SemEventMultiDarwinRetain(pThis);
lck_spin_lock(pThis->pSpinlock);
/*
* Set the signal and increment the generation counter.
*/
uint32_t fNew = ASMAtomicUoReadU32(&pThis->fStateAndGen);
fNew += 1 << RTSEMEVENTMULTIDARWIN_GEN_SHIFT;
fNew |= RTSEMEVENTMULTIDARWIN_STATE_MASK;
ASMAtomicWriteU32(&pThis->fStateAndGen, fNew);
/*
* Wake up all sleeping threads.
*/
if (pThis->fHaveBlockedThreads)
{
ASMAtomicWriteBool(&pThis->fHaveBlockedThreads, false);
thread_wakeup_prim((event_t)pThis, FALSE /* all threads */, THREAD_AWAKENED);
}
lck_spin_unlock(pThis->pSpinlock);
rtR0SemEventMultiDarwinRelease(pThis);
RT_ASSERT_PREEMPT_CPUID();
return VINF_SUCCESS;
}
RTDECL(int) RTSemEventMultiDestroy(RTSEMEVENTMULTI hEventMultiSem)
{
PRTSEMEVENTMULTIINTERNAL pThis = (PRTSEMEVENTMULTIINTERNAL)hEventMultiSem;
if (pThis == NIL_RTSEMEVENTMULTI)
return VINF_SUCCESS;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
AssertMsgReturn(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC, ("pThis=%p u32Magic=%#x\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
Assert(pThis->cRefs > 0);
RT_ASSERT_INTS_ON();
lck_spin_lock(pThis->pSpinlock);
ASMAtomicWriteU32(&pThis->u32Magic, ~RTSEMEVENTMULTI_MAGIC); /* make the handle invalid */
ASMAtomicAndU32(&pThis->fStateAndGen, RTSEMEVENTMULTIDARWIN_GEN_MASK);
if (pThis->fHaveBlockedThreads)
{
/* abort waiting threads. */
thread_wakeup_prim((event_t)pThis, FALSE /* all threads */, THREAD_RESTART);
}
lck_spin_unlock(pThis->pSpinlock);
rtR0SemEventMultiDarwinRelease(pThis);
return VINF_SUCCESS;
}
RTDECL(int) RTTimerDestroy(PRTTIMER pTimer)
{
if (pTimer == NULL)
return VINF_SUCCESS;
RTTIMER_ASSERT_VALID_RET(pTimer);
RT_ASSERT_INTS_ON();
/*
* It is not possible to destroy a timer from it's callback function.
* Cyclic makes that impossible (or at least extremely risky).
*/
AssertReturn(!rtTimerSolIsCallingFromTimerProc(pTimer), VERR_INVALID_CONTEXT);
/*
* Invalidate the handle, make sure it's stopped and free the associated resources.
*/
ASMAtomicWriteU32(&pTimer->u32Magic, ~RTTIMER_MAGIC);
if ( !pTimer->fSuspended
|| pTimer->hCyclicId != CYCLIC_NONE) /* 2nd check shouldn't happen */
rtTimerSolStopIt(pTimer);
rtTimerSolRelease(pTimer);
return VINF_SUCCESS;
}
/**
* Destroys the timer when the reference counter has reached zero.
*
* @returns 0 (new references counter value).
* @param pTimer The timer.
*/
static uint32_t rtTimeSolReleaseCleanup(PRTTIMER pTimer)
{
Assert(pTimer->hCyclicId == CYCLIC_NONE);
ASMAtomicWriteU32(&pTimer->u32Magic, ~RTTIMER_MAGIC);
RTMemFree(pTimer);
return 0;
}
RTDECL(int) RTTimerDestroy(PRTTIMER pTimer)
{
/* It's ok to pass NULL pointer. */
if (pTimer == /*NIL_RTTIMER*/ NULL)
return VINF_SUCCESS;
AssertPtrReturn(pTimer, VERR_INVALID_HANDLE);
AssertReturn(pTimer->u32Magic == RTTIMER_MAGIC, VERR_INVALID_HANDLE);
/*
* We do not support destroying a timer from the callback because it is
* not 101% safe since we cannot flush DPCs. Solaris has the same restriction.
*/
AssertReturn(KeGetCurrentIrql() == PASSIVE_LEVEL, VERR_INVALID_CONTEXT);
/*
* Invalidate the timer, stop it if it's running and finally
* free up the memory.
*/
ASMAtomicWriteU32(&pTimer->u32Magic, ~RTTIMER_MAGIC);
if (!ASMAtomicUoReadBool(&pTimer->fSuspended))
rtTimerNtStopWorker(pTimer);
/*
* Flush DPCs to be on the safe side.
*/
if (g_pfnrtNtKeFlushQueuedDpcs)
g_pfnrtNtKeFlushQueuedDpcs();
RTMemFree(pTimer);
return VINF_SUCCESS;
}
RTDECL(int) RTSemMutexDestroy(RTSEMMUTEX hMutexSem)
{
/*
* Validate input.
*/
if (hMutexSem == NIL_RTSEMMUTEX)
return VINF_SUCCESS;
struct RTSEMMUTEXINTERNAL *pThis = hMutexSem;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
AssertMsgReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC,
("hMutexSem=%p u32Magic=%#x\n", pThis, pThis->u32Magic),
VERR_INVALID_HANDLE);
/*
* Invalidate the semaphore and wake up anyone waiting on it.
*/
ASMAtomicWriteU32(&pThis->u32Magic, RTSEMMUTEX_MAGIC_DEAD);
if (ASMAtomicXchgS32(&pThis->iState, 0) > 0)
{
sys_futex(&pThis->iState, FUTEX_WAKE, INT_MAX, NULL, NULL, 0);
usleep(1000);
}
pThis->Owner = (pthread_t)~0;
pThis->cNestings = 0;
#ifdef RTSEMMUTEX_STRICT
RTLockValidatorRecExclDelete(&pThis->ValidatorRec);
#endif
/*
* Free the semaphore memory and be gone.
*/
RTMemFree(pThis);
return VINF_SUCCESS;
}
RTDECL(int) RTSemEventSignal(RTSEMEVENT hEventSem)
{
/*
* Validate input.
*/
struct RTSEMEVENTINTERNAL *pThis = hEventSem;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
AssertReturn(pThis->iMagic == RTSEMEVENT_MAGIC, VERR_INVALID_HANDLE);
#ifdef RTSEMEVENT_STRICT
if (pThis->fEverHadSignallers)
{
int rc9 = RTLockValidatorRecSharedCheckSignaller(&pThis->Signallers, NIL_RTTHREAD);
if (RT_FAILURE(rc9))
return rc9;
}
#endif
ASMAtomicWriteU32(&pThis->fSignalled, 1);
if (ASMAtomicReadS32(&pThis->cWaiters) < 1)
return VINF_SUCCESS;
/* somebody is waiting, try wake up one of them. */
long cWoken = sys_futex(&pThis->fSignalled, FUTEX_WAKE, 1, NULL, NULL, 0);
if (RT_LIKELY(cWoken >= 0))
return VINF_SUCCESS;
if (RT_UNLIKELY(pThis->iMagic != RTSEMEVENT_MAGIC))
return VERR_SEM_DESTROYED;
return VERR_INVALID_PARAMETER;
}
RTDECL(int) RTSemEventMultiDestroy(RTSEMEVENTMULTI hEventMultiSem)
{
/*
* Validate input.
*/
struct RTSEMEVENTMULTIINTERNAL *pThis = hEventMultiSem;
if (pThis == NIL_RTSEMEVENTMULTI)
return VINF_SUCCESS;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
AssertReturn(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC, VERR_INVALID_HANDLE);
/*
* Invalidate the semaphore and wake up anyone waiting on it.
*/
ASMAtomicWriteU32(&pThis->u32Magic, RTSEMEVENTMULTI_MAGIC + 1);
if (ASMAtomicXchgS32(&pThis->iState, -1) == 1)
{
sys_futex(&pThis->iState, FUTEX_WAKE, INT_MAX, NULL, NULL, 0);
usleep(1000);
}
/*
* Free the semaphore memory and be gone.
*/
#ifdef RTSEMEVENTMULTI_STRICT
RTLockValidatorRecSharedDelete(&pThis->Signallers);
#endif
RTMemFree(pThis);
return VINF_SUCCESS;
}
RTDECL(int) RTSemMutexDestroy(RTSEMMUTEX hMutexSem)
{
/*
* Validate input.
*/
if (hMutexSem == NIL_RTSEMMUTEX)
return VINF_SUCCESS;
struct RTSEMMUTEXINTERNAL *pThis = hMutexSem;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
AssertReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, VERR_INVALID_HANDLE);
/*
* Try destroy it.
*/
int rc = pthread_mutex_destroy(&pThis->Mutex);
if (rc)
{
AssertMsgFailed(("Failed to destroy mutex sem %p, rc=%d.\n", hMutexSem, rc));
return RTErrConvertFromErrno(rc);
}
/*
* Free the memory and be gone.
*/
ASMAtomicWriteU32(&pThis->u32Magic, RTSEMMUTEX_MAGIC_DEAD);
pThis->Owner = (pthread_t)-1;
pThis->cNesting = UINT32_MAX;
#ifdef RTSEMMUTEX_STRICT
RTLockValidatorRecExclDelete(&pThis->ValidatorRec);
#endif
RTMemTmpFree(pThis);
return VINF_SUCCESS;
}
static PVBOXDISPMPLOGGER vboxDispMpLoggerGet()
{
if (ASMAtomicCmpXchgU32((volatile uint32_t *)&g_VBoxDispMpLogger.enmState, VBOXDISPMPLOGGER_STATE_INITIALIZING, VBOXDISPMPLOGGER_STATE_UNINITIALIZED))
{
HRESULT hr = vboxDispKmtCallbacksInit(&g_VBoxDispMpLogger.KmtCallbacks);
if (hr == S_OK)
{
/* we are on Vista+
* check if we can Open Adapter, i.e. WDDM driver is installed */
VBOXDISPKMT_ADAPTER Adapter;
hr = vboxDispKmtOpenAdapter(&g_VBoxDispMpLogger.KmtCallbacks, &Adapter);
if (hr == S_OK)
{
ASMAtomicWriteU32((volatile uint32_t *)&g_VBoxDispMpLogger.enmState, VBOXDISPMPLOGGER_STATE_INITIALIZED);
vboxDispKmtCloseAdapter(&Adapter);
return &g_VBoxDispMpLogger;
}
vboxDispKmtCallbacksTerm(&g_VBoxDispMpLogger.KmtCallbacks);
}
}
else if (ASMAtomicReadU32((volatile uint32_t *)&g_VBoxDispMpLogger.enmState) == VBOXDISPMPLOGGER_STATE_INITIALIZED)
{
return &g_VBoxDispMpLogger;
}
return NULL;
}
/**
* Destroys an module after the reference count has reached zero.
*
* @param pDbgMod The module instance.
*/
static void rtDbgModDestroy(PRTDBGMODINT pDbgMod)
{
/*
* Close the debug info interpreter first, then the image interpret.
*/
RTCritSectEnter(&pDbgMod->CritSect); /* paranoia */
if (pDbgMod->pDbgVt)
{
pDbgMod->pDbgVt->pfnClose(pDbgMod);
pDbgMod->pDbgVt = NULL;
pDbgMod->pvDbgPriv = NULL;
}
if (pDbgMod->pImgVt)
{
pDbgMod->pImgVt->pfnClose(pDbgMod);
pDbgMod->pImgVt = NULL;
pDbgMod->pvImgPriv = NULL;
}
/*
* Free the resources.
*/
ASMAtomicWriteU32(&pDbgMod->u32Magic, ~RTDBGMOD_MAGIC);
RTStrCacheRelease(g_hDbgModStrCache, pDbgMod->pszName);
RTStrCacheRelease(g_hDbgModStrCache, pDbgMod->pszImgFile);
RTStrCacheRelease(g_hDbgModStrCache, pDbgMod->pszDbgFile);
RTCritSectLeave(&pDbgMod->CritSect); /* paranoia */
RTCritSectDelete(&pDbgMod->CritSect);
RTMemFree(pDbgMod);
}
RTDECL(int) RTSemEventDestroy(RTSEMEVENT hEventSem)
{
/*
* Validate handle.
*/
struct RTSEMEVENTINTERNAL *pThis = hEventSem;
if (pThis == NIL_RTSEMEVENT)
return VINF_SUCCESS;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
uint32_t u32 = pThis->u32State;
AssertReturn(u32 == EVENT_STATE_NOT_SIGNALED || u32 == EVENT_STATE_SIGNALED, VERR_INVALID_HANDLE);
/*
* Abort all waiters forcing them to return failure.
*/
int rc;
for (int i = 30; i > 0; i--)
{
ASMAtomicWriteU32(&pThis->u32State, EVENT_STATE_UNINITIALIZED);
rc = pthread_cond_destroy(&pThis->Cond);
if (rc != EBUSY)
break;
pthread_cond_broadcast(&pThis->Cond);
usleep(1000);
}
if (rc)
{
AssertMsgFailed(("Failed to destroy event sem %p, rc=%d.\n", pThis, rc));
return RTErrConvertFromErrno(rc);
}
/*
* Destroy the semaphore
* If it's busy we'll wait a bit to give the threads a chance to be scheduled.
*/
for (int i = 30; i > 0; i--)
{
rc = pthread_mutex_destroy(&pThis->Mutex);
if (rc != EBUSY)
break;
usleep(1000);
}
if (rc)
{
AssertMsgFailed(("Failed to destroy event sem %p, rc=%d. (mutex)\n", pThis, rc));
return RTErrConvertFromErrno(rc);
}
/*
* Free the semaphore memory and be gone.
*/
#ifdef RTSEMEVENT_STRICT
RTLockValidatorRecSharedDelete(&pThis->Signallers);
#endif
if (!(pThis->fFlags & RTSEMEVENT_FLAGS_BOOTSTRAP_HACK))
RTMemFree(pThis);
else
rtMemBaseFree(pThis);
return VINF_SUCCESS;
}
RTDECL(int) RTCritSectDelete(PRTCRITSECT pCritSect)
{
/*
* Assert free waiters and so on.
*/
Assert(pCritSect);
Assert(pCritSect->u32Magic == RTCRITSECT_MAGIC);
Assert(pCritSect->cNestings == 0);
Assert(pCritSect->cLockers == -1);
Assert(pCritSect->NativeThreadOwner == NIL_RTNATIVETHREAD);
/*
* Invalidate the structure and free the mutex.
* In case someone is waiting we'll signal the semaphore cLockers + 1 times.
*/
ASMAtomicWriteU32(&pCritSect->u32Magic, ~RTCRITSECT_MAGIC);
pCritSect->fFlags = 0;
pCritSect->cNestings = 0;
pCritSect->NativeThreadOwner= NIL_RTNATIVETHREAD;
RTSEMEVENT EventSem = pCritSect->EventSem;
pCritSect->EventSem = NIL_RTSEMEVENT;
while (pCritSect->cLockers-- >= 0)
RTSemEventSignal(EventSem);
ASMAtomicWriteS32(&pCritSect->cLockers, -1);
int rc = RTSemEventDestroy(EventSem);
AssertRC(rc);
RTLockValidatorRecExclDestroy(&pCritSect->pValidatorRec);
return rc;
}
/**
* Mac OS X: Really ugly hack to bypass a set-uid check in AppKit.
*
* This will modify the issetugid() function to always return zero. This must
* be done _before_ AppKit is initialized, otherwise it will refuse to play ball
* with us as it distrusts set-uid processes since Snow Leopard. We, however,
* have carefully dropped all root privileges at this point and there should be
* no reason for any security concern here.
*/
static void HideSetUidRootFromAppKit()
{
/* Find issetguid() and make it always return 0 by modifying the code: */
void *pvAddr = dlsym(RTLD_DEFAULT, "issetugid");
int rc = mprotect((void *)((uintptr_t)pvAddr & ~(uintptr_t)0xfff), 0x2000, PROT_WRITE | PROT_READ | PROT_EXEC);
if (!rc)
ASMAtomicWriteU32((volatile uint32_t *)pvAddr, 0xccc3c031); /* xor eax, eax; ret; int3 */
}
RTDECL(int) RTSemEventSignal(RTSEMEVENT hEventSem)
{
/*
* Validate input.
*/
struct RTSEMEVENTINTERNAL *pThis = hEventSem;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
uint32_t u32 = pThis->u32State;
AssertReturn(u32 == EVENT_STATE_NOT_SIGNALED || u32 == EVENT_STATE_SIGNALED, VERR_INVALID_HANDLE);
#ifdef RTSEMEVENT_STRICT
if (pThis->fEverHadSignallers)
{
int rc9 = RTLockValidatorRecSharedCheckSignaller(&pThis->Signallers, NIL_RTTHREAD);
if (RT_FAILURE(rc9))
return rc9;
}
#endif
/*
* Lock the mutex semaphore.
*/
int rc = pthread_mutex_lock(&pThis->Mutex);
if (rc)
{
AssertMsgFailed(("Failed to lock event sem %p, rc=%d.\n", hEventSem, rc));
return RTErrConvertFromErrno(rc);
}
/*
* Check the state.
*/
if (pThis->u32State == EVENT_STATE_NOT_SIGNALED)
{
ASMAtomicWriteU32(&pThis->u32State, EVENT_STATE_SIGNALED);
rc = pthread_cond_signal(&pThis->Cond);
AssertMsg(!rc, ("Failed to signal event sem %p, rc=%d.\n", hEventSem, rc));
}
else if (pThis->u32State == EVENT_STATE_SIGNALED)
{
rc = pthread_cond_signal(&pThis->Cond); /* give'm another kick... */
AssertMsg(!rc, ("Failed to signal event sem %p, rc=%d. (2)\n", hEventSem, rc));
}
else
rc = VERR_SEM_DESTROYED;
/*
* Release the mutex and return.
*/
int rc2 = pthread_mutex_unlock(&pThis->Mutex);
AssertMsg(!rc2, ("Failed to unlock event sem %p, rc=%d.\n", hEventSem, rc));
if (rc)
return RTErrConvertFromErrno(rc);
if (rc2)
return RTErrConvertFromErrno(rc2);
return VINF_SUCCESS;
}
static int pdmacFileAioMgrWaitForBlockingEvent(PPDMACEPFILEMGR pAioMgr, PDMACEPFILEAIOMGRBLOCKINGEVENT enmEvent)
{
ASMAtomicWriteU32((volatile uint32_t *)&pAioMgr->enmBlockingEvent, enmEvent);
Assert(!pAioMgr->fBlockingEventPending);
ASMAtomicXchgBool(&pAioMgr->fBlockingEventPending, true);
/* Wakeup the async I/O manager */
pdmacFileAioMgrWakeup(pAioMgr);
/* Wait for completion. */
int rc = RTSemEventWait(pAioMgr->EventSemBlock, RT_INDEFINITE_WAIT);
AssertRC(rc);
ASMAtomicXchgBool(&pAioMgr->fBlockingEventPending, false);
ASMAtomicWriteU32((volatile uint32_t *)&pAioMgr->enmBlockingEvent, PDMACEPFILEAIOMGRBLOCKINGEVENT_INVALID);
return rc;
}
RTDECL(int) RTSemMutexRelease(RTSEMMUTEX hMutexSem)
{
/*
* Validate input.
*/
struct RTSEMMUTEXINTERNAL *pThis = hMutexSem;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
AssertReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, VERR_INVALID_HANDLE);
#ifdef RTSEMMUTEX_STRICT
int rc9 = RTLockValidatorRecExclReleaseOwner(&pThis->ValidatorRec, pThis->cNesting == 1);
if (RT_FAILURE(rc9))
return rc9;
#endif
/*
* Check if nested.
*/
pthread_t Self = pthread_self();
if (RT_UNLIKELY( pThis->Owner != Self
|| pThis->cNesting == 0))
{
AssertMsgFailed(("Not owner of mutex %p!! Self=%08x Owner=%08x cNesting=%d\n",
pThis, Self, pThis->Owner, pThis->cNesting));
return VERR_NOT_OWNER;
}
/*
* If nested we'll just pop a nesting.
*/
if (pThis->cNesting > 1)
{
ASMAtomicDecU32(&pThis->cNesting);
return VINF_SUCCESS;
}
/*
* Clear the state. (cNesting == 1)
*/
pThis->Owner = (pthread_t)-1;
ASMAtomicWriteU32(&pThis->cNesting, 0);
/*
* Unlock mutex semaphore.
*/
int rc = pthread_mutex_unlock(&pThis->Mutex);
if (RT_UNLIKELY(rc))
{
AssertMsgFailed(("Failed to unlock mutex sem %p, rc=%d.\n", hMutexSem, rc)); NOREF(rc);
return RTErrConvertFromErrno(rc);
}
return VINF_SUCCESS;
}
RTDECL(int) RTSemEventDestroy(RTSEMEVENT hEventSem)
{
/*
* Validate input.
*/
PRTSEMEVENTINTERNAL pThis = hEventSem;
if (pThis == NIL_RTSEMEVENT)
return VINF_SUCCESS;
AssertMsgReturn(pThis->u32Magic == RTSEMEVENT_MAGIC, ("pThis->u32Magic=%RX32 pThis=%p\n", pThis->u32Magic, pThis), VERR_INVALID_HANDLE);
Assert(pThis->cRefs > 0);
/*
* Invalidate it and signal the object just in case.
*/
ASMAtomicWriteU32(&pThis->u32Magic, ~RTSEMEVENT_MAGIC);
ASMAtomicWriteU32(&pThis->fState, 0);
rtR0SemBsdBroadcast(pThis);
rtR0SemEventBsdRelease(pThis);
return VINF_SUCCESS;
}
RTDECL(int) RTSemMutexRelease(RTSEMMUTEX hMutexSem)
{
/*
* Validate input.
*/
struct RTSEMMUTEXINTERNAL *pThis = hMutexSem;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
AssertReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, VERR_INVALID_HANDLE);
#ifdef RTSEMMUTEX_STRICT
int rc9 = RTLockValidatorRecExclReleaseOwner(&pThis->ValidatorRec, pThis->cNestings == 1);
if (RT_FAILURE(rc9))
return rc9;
#endif
/*
* Check if nested.
*/
pthread_t Self = pthread_self();
if (RT_UNLIKELY( pThis->Owner != Self
|| pThis->cNestings == 0))
{
AssertMsgFailed(("Not owner of mutex %p!! Self=%08x Owner=%08x cNestings=%d\n",
pThis, Self, pThis->Owner, pThis->cNestings));
return VERR_NOT_OWNER;
}
/*
* If nested we'll just pop a nesting.
*/
if (pThis->cNestings > 1)
{
ASMAtomicDecU32(&pThis->cNestings);
return VINF_SUCCESS;
}
/*
* Clear the state. (cNestings == 1)
*/
pThis->Owner = (pthread_t)~0;
ASMAtomicWriteU32(&pThis->cNestings, 0);
/*
* Release the mutex.
*/
int32_t iNew = ASMAtomicDecS32(&pThis->iState);
if (RT_UNLIKELY(iNew != 0))
{
/* somebody is waiting, try wake up one of them. */
ASMAtomicXchgS32(&pThis->iState, 0);
(void)sys_futex(&pThis->iState, FUTEX_WAKE, 1, NULL, NULL, 0);
}
return VINF_SUCCESS;
}
RTDECL(int) RTSemFastMutexDestroy(RTSEMFASTMUTEX hFastMtx)
{
PRTSEMFASTMUTEXINTERNAL pThis = hFastMtx;
if (pThis == NIL_RTSEMFASTMUTEX)
return VINF_SUCCESS;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
AssertMsgReturn(pThis->u32Magic == RTSEMFASTMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
ASMAtomicWriteU32(&pThis->u32Magic, RTSEMFASTMUTEX_MAGIC_DEAD);
sx_destroy(&pThis->SxLock);
RTMemFree(pThis);
return VINF_SUCCESS;
}
/**
* Deletes one critical section.
*
* @returns Return code from RTCritSectDelete.
*
* @param pVM Pointer to the VM.
* @param pCritSect The critical section.
* @param pPrev The previous critical section in the list.
* @param fFinal Set if this is the final call and statistics shouldn't be deregistered.
*
* @remarks Caller must have entered the ListCritSect.
*/
static int pdmR3CritSectDeleteOne(PVM pVM, PUVM pUVM, PPDMCRITSECTINT pCritSect, PPDMCRITSECTINT pPrev, bool fFinal)
{
/*
* Assert free waiters and so on (c&p from RTCritSectDelete).
*/
Assert(pCritSect->Core.u32Magic == RTCRITSECT_MAGIC);
Assert(pCritSect->Core.cNestings == 0);
Assert(pCritSect->Core.cLockers == -1);
Assert(pCritSect->Core.NativeThreadOwner == NIL_RTNATIVETHREAD);
Assert(RTCritSectIsOwner(&pUVM->pdm.s.ListCritSect));
/*
* Unlink it.
*/
if (pPrev)
pPrev->pNext = pCritSect->pNext;
else
pUVM->pdm.s.pCritSects = pCritSect->pNext;
/*
* Delete it (parts taken from RTCritSectDelete).
* In case someone is waiting we'll signal the semaphore cLockers + 1 times.
*/
ASMAtomicWriteU32(&pCritSect->Core.u32Magic, 0);
SUPSEMEVENT hEvent = (SUPSEMEVENT)pCritSect->Core.EventSem;
pCritSect->Core.EventSem = NIL_RTSEMEVENT;
while (pCritSect->Core.cLockers-- >= 0)
SUPSemEventSignal(pVM->pSession, hEvent);
ASMAtomicWriteS32(&pCritSect->Core.cLockers, -1);
int rc = SUPSemEventClose(pVM->pSession, hEvent);
AssertRC(rc);
RTLockValidatorRecExclDestroy(&pCritSect->Core.pValidatorRec);
pCritSect->pNext = NULL;
pCritSect->pvKey = NULL;
pCritSect->pVMR3 = NULL;
pCritSect->pVMR0 = NIL_RTR0PTR;
pCritSect->pVMRC = NIL_RTRCPTR;
RTStrFree((char *)pCritSect->pszName);
pCritSect->pszName = NULL;
if (!fFinal)
{
STAMR3Deregister(pVM, &pCritSect->StatContentionRZLock);
STAMR3Deregister(pVM, &pCritSect->StatContentionRZUnlock);
STAMR3Deregister(pVM, &pCritSect->StatContentionR3);
#ifdef VBOX_WITH_STATISTICS
STAMR3Deregister(pVM, &pCritSect->StatLocked);
#endif
}
return rc;
}
RTDECL(int) RTSemMutexRelease(RTSEMMUTEX hMutexSem)
{
/*
* Validate.
*/
RTSEMMUTEXINTERNAL *pThis = hMutexSem;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
AssertReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, VERR_INVALID_HANDLE);
/*
* Check ownership and recursions.
*/
RTNATIVETHREAD hNativeSelf = RTThreadNativeSelf();
RTNATIVETHREAD hNativeOwner;
ASMAtomicReadHandle(&pThis->hNativeOwner, &hNativeOwner);
if (RT_UNLIKELY(hNativeOwner != hNativeSelf))
{
AssertMsgFailed(("Not owner of mutex %p!! hNativeSelf=%RTntrd Owner=%RTntrd cRecursions=%d\n",
pThis, hNativeSelf, hNativeOwner, pThis->cRecursions));
return VERR_NOT_OWNER;
}
if (pThis->cRecursions > 1)
{
#ifdef RTSEMMUTEX_STRICT
int rc9 = RTLockValidatorRecExclUnwind(&pThis->ValidatorRec);
if (RT_FAILURE(rc9))
return rc9;
#endif
ASMAtomicDecU32(&pThis->cRecursions);
return VINF_SUCCESS;
}
/*
* Unlock mutex semaphore.
*/
#ifdef RTSEMMUTEX_STRICT
int rc9 = RTLockValidatorRecExclReleaseOwner(&pThis->ValidatorRec, false);
if (RT_FAILURE(rc9))
return rc9;
#endif
ASMAtomicWriteU32(&pThis->cRecursions, 0);
ASMAtomicWriteHandle(&pThis->hNativeOwner, NIL_RTNATIVETHREAD);
if (ReleaseMutex(pThis->hMtx))
return VINF_SUCCESS;
int rc = RTErrConvertFromWin32(GetLastError());
AssertMsgFailed(("%p/%p, rc=%Rrc lasterr=%d\n", pThis, pThis->hMtx, rc, GetLastError()));
return rc;
}
VBOXDISPMPLOGGER_DECL(int) VBoxDispMpLoggerTerm(void)
{
if (ASMAtomicCmpXchgU32((volatile uint32_t *)&g_VBoxDispMpLogger.enmState, VBOXDISPMPLOGGER_STATE_UNINITIALIZING, VBOXDISPMPLOGGER_STATE_INITIALIZED))
{
vboxDispKmtCallbacksTerm(&g_VBoxDispMpLogger.KmtCallbacks);
ASMAtomicWriteU32((volatile uint32_t *)&g_VBoxDispMpLogger.enmState, VBOXDISPMPLOGGER_STATE_UNINITIALIZED);
return S_OK;
}
else if (ASMAtomicReadU32((volatile uint32_t *)&g_VBoxDispMpLogger.enmState) == VBOXDISPMPLOGGER_STATE_UNINITIALIZED)
{
return S_OK;
}
return VERR_NOT_SUPPORTED;
}
RTDECL(int) RTTimerDestroy(PRTTIMER pTimer)
{
if (pTimer == NULL)
return VINF_SUCCESS;
RTTIMER_ASSERT_VALID_RET(pTimer);
RT_ASSERT_INTS_ON();
/*
* Free the associated resources.
*/
RTTimerStop(pTimer);
ASMAtomicWriteU32(&pTimer->u32Magic, ~RTTIMER_MAGIC);
RTMemFree(pTimer);
return VINF_SUCCESS;
}
