/*static*/
DECLCALLBACK(int) VirtualBox::ClientWatcher::worker(RTTHREAD /* thread */, void *pvUser)
{
LogFlowFuncEnter();
VirtualBox::ClientWatcher *that = (VirtualBox::ClientWatcher *)pvUser;
Assert(that);
typedef std::vector<ComObjPtr<Machine> > MachineVector;
typedef std::vector<ComObjPtr<SessionMachine> > SessionMachineVector;
SessionMachineVector machines;
MachineVector spawnedMachines;
size_t cnt = 0;
size_t cntSpawned = 0;
VirtualBoxBase::initializeComForThread();
#if defined(RT_OS_WINDOWS)
/// @todo (dmik) processes reaping!
HANDLE handles[MAXIMUM_WAIT_OBJECTS];
handles[0] = that->mUpdateReq;
do
{
AutoCaller autoCaller(that->mVirtualBox);
/* VirtualBox has been early uninitialized, terminate */
if (!autoCaller.isOk())
break;
do
{
/* release the caller to let uninit() ever proceed */
autoCaller.release();
DWORD rc = ::WaitForMultipleObjects((DWORD)(1 + cnt + cntSpawned),
handles,
FALSE,
INFINITE);
/* Restore the caller before using VirtualBox. If it fails, this
* means VirtualBox is being uninitialized and we must terminate. */
autoCaller.add();
if (!autoCaller.isOk())
break;
bool update = false;
if (rc == WAIT_OBJECT_0)
{
/* update event is signaled */
update = true;
}
else if (rc > WAIT_OBJECT_0 && rc <= (WAIT_OBJECT_0 + cnt))
{
/* machine mutex is released */
(machines[rc - WAIT_OBJECT_0 - 1])->i_checkForDeath();
update = true;
}
else if (rc > WAIT_ABANDONED_0 && rc <= (WAIT_ABANDONED_0 + cnt))
{
/* machine mutex is abandoned due to client process termination */
(machines[rc - WAIT_ABANDONED_0 - 1])->i_checkForDeath();
update = true;
}
else if (rc > WAIT_OBJECT_0 + cnt && rc <= (WAIT_OBJECT_0 + cntSpawned))
{
/* spawned VM process has terminated (normally or abnormally) */
(spawnedMachines[rc - WAIT_OBJECT_0 - cnt - 1])->
i_checkForSpawnFailure();
update = true;
}
if (update)
{
/* close old process handles */
for (size_t i = 1 + cnt; i < 1 + cnt + cntSpawned; ++i)
CloseHandle(handles[i]);
// get reference to the machines list in VirtualBox
VirtualBox::MachinesOList &allMachines = that->mVirtualBox->i_getMachinesList();
// lock the machines list for reading
AutoReadLock thatLock(allMachines.getLockHandle() COMMA_LOCKVAL_SRC_POS);
/* obtain a new set of opened machines */
cnt = 0;
machines.clear();
for (MachinesOList::iterator it = allMachines.begin();
it != allMachines.end();
++it)
{
/// @todo handle situations with more than 64 objects
AssertMsgBreak((1 + cnt) <= MAXIMUM_WAIT_OBJECTS,
("MAXIMUM_WAIT_OBJECTS reached"));
ComObjPtr<SessionMachine> sm;
if ((*it)->i_isSessionOpenOrClosing(sm))
{
AutoCaller smCaller(sm);
if (smCaller.isOk())
{
AutoReadLock smLock(sm COMMA_LOCKVAL_SRC_POS);
Machine::ClientToken *ct = sm->i_getClientToken();
if (ct)
{
HANDLE ipcSem = ct->getToken();
machines.push_back(sm);
handles[1 + cnt] = ipcSem;
++cnt;
}
}
}
}
LogFlowFunc(("UPDATE: direct session count = %d\n", cnt));
/* obtain a new set of spawned machines */
cntSpawned = 0;
spawnedMachines.clear();
for (MachinesOList::iterator it = allMachines.begin();
it != allMachines.end();
++it)
{
/// @todo handle situations with more than 64 objects
AssertMsgBreak((1 + cnt + cntSpawned) <= MAXIMUM_WAIT_OBJECTS,
("MAXIMUM_WAIT_OBJECTS reached"));
if ((*it)->i_isSessionSpawning())
{
ULONG pid;
HRESULT hrc = (*it)->COMGETTER(SessionPID)(&pid);
if (SUCCEEDED(hrc))
{
HANDLE ph = OpenProcess(SYNCHRONIZE, FALSE, pid);
AssertMsg(ph != NULL, ("OpenProcess (pid=%d) failed with %d\n",
pid, GetLastError()));
if (ph != NULL)
{
spawnedMachines.push_back(*it);
handles[1 + cnt + cntSpawned] = ph;
++cntSpawned;
}
}
}
}
LogFlowFunc(("UPDATE: spawned session count = %d\n", cntSpawned));
// machines lock unwinds here
}
}
while (true);
}
while (0);
/* close old process handles */
for (size_t i = 1 + cnt; i < 1 + cnt + cntSpawned; ++i)
CloseHandle(handles[i]);
/* release sets of machines if any */
machines.clear();
spawnedMachines.clear();
::CoUninitialize();
#elif defined(RT_OS_OS2)
/// @todo (dmik) processes reaping!
/* according to PMREF, 64 is the maximum for the muxwait list */
SEMRECORD handles[64];
HMUX muxSem = NULLHANDLE;
do
{
AutoCaller autoCaller(that->mVirtualBox);
/* VirtualBox has been early uninitialized, terminate */
if (!autoCaller.isOk())
break;
do
{
/* release the caller to let uninit() ever proceed */
autoCaller.release();
int vrc = RTSemEventWait(that->mUpdateReq, 500);
/* Restore the caller before using VirtualBox. If it fails, this
* means VirtualBox is being uninitialized and we must terminate. */
autoCaller.add();
if (!autoCaller.isOk())
break;
bool update = false;
bool updateSpawned = false;
if (RT_SUCCESS(vrc))
{
/* update event is signaled */
update = true;
updateSpawned = true;
}
else
{
AssertMsg(vrc == VERR_TIMEOUT || vrc == VERR_INTERRUPTED,
("RTSemEventWait returned %Rrc\n", vrc));
/* are there any mutexes? */
if (cnt > 0)
{
/* figure out what's going on with machines */
unsigned long semId = 0;
APIRET arc = ::DosWaitMuxWaitSem(muxSem,
SEM_IMMEDIATE_RETURN, &semId);
if (arc == NO_ERROR)
{
/* machine mutex is normally released */
Assert(semId >= 0 && semId < cnt);
if (semId >= 0 && semId < cnt)
{
#if 0//def DEBUG
{
AutoReadLock machineLock(machines[semId] COMMA_LOCKVAL_SRC_POS);
LogFlowFunc(("released mutex: machine='%ls'\n",
machines[semId]->name().raw()));
}
#endif
machines[semId]->i_checkForDeath();
}
update = true;
}
else if (arc == ERROR_SEM_OWNER_DIED)
{
/* machine mutex is abandoned due to client process
* termination; find which mutex is in the Owner Died
* state */
for (size_t i = 0; i < cnt; ++i)
{
PID pid; TID tid;
unsigned long reqCnt;
arc = DosQueryMutexSem((HMTX)handles[i].hsemCur, &pid, &tid, &reqCnt);
if (arc == ERROR_SEM_OWNER_DIED)
{
/* close the dead mutex as asked by PMREF */
::DosCloseMutexSem((HMTX)handles[i].hsemCur);
Assert(i >= 0 && i < cnt);
if (i >= 0 && i < cnt)
{
#if 0//def DEBUG
{
AutoReadLock machineLock(machines[semId] COMMA_LOCKVAL_SRC_POS);
LogFlowFunc(("mutex owner dead: machine='%ls'\n",
machines[i]->name().raw()));
}
#endif
machines[i]->i_checkForDeath();
}
}
}
update = true;
}
else
AssertMsg(arc == ERROR_INTERRUPT || arc == ERROR_TIMEOUT,
("DosWaitMuxWaitSem returned %d\n", arc));
}
/* are there any spawning sessions? */
if (cntSpawned > 0)
{
for (size_t i = 0; i < cntSpawned; ++i)
updateSpawned |= (spawnedMachines[i])->
i_checkForSpawnFailure();
}
}
if (update || updateSpawned)
{
// get reference to the machines list in VirtualBox
VirtualBox::MachinesOList &allMachines = that->mVirtualBox->i_getMachinesList();
// lock the machines list for reading
AutoReadLock thatLock(allMachines.getLockHandle() COMMA_LOCKVAL_SRC_POS);
if (update)
{
/* close the old muxsem */
if (muxSem != NULLHANDLE)
::DosCloseMuxWaitSem(muxSem);
/* obtain a new set of opened machines */
cnt = 0;
machines.clear();
for (MachinesOList::iterator it = allMachines.begin();
it != allMachines.end(); ++it)
{
/// @todo handle situations with more than 64 objects
AssertMsg(cnt <= 64 /* according to PMREF */,
("maximum of 64 mutex semaphores reached (%d)",
cnt));
ComObjPtr<SessionMachine> sm;
if ((*it)->i_isSessionOpenOrClosing(sm))
{
AutoCaller smCaller(sm);
if (smCaller.isOk())
{
AutoReadLock smLock(sm COMMA_LOCKVAL_SRC_POS);
ClientToken *ct = sm->i_getClientToken();
if (ct)
{
HMTX ipcSem = ct->getToken();
machines.push_back(sm);
handles[cnt].hsemCur = (HSEM)ipcSem;
handles[cnt].ulUser = cnt;
++cnt;
}
}
}
}
LogFlowFunc(("UPDATE: direct session count = %d\n", cnt));
if (cnt > 0)
{
/* create a new muxsem */
APIRET arc = ::DosCreateMuxWaitSem(NULL, &muxSem, cnt,
handles,
DCMW_WAIT_ANY);
AssertMsg(arc == NO_ERROR,
("DosCreateMuxWaitSem returned %d\n", arc));
NOREF(arc);
}
}
if (updateSpawned)
{
/* obtain a new set of spawned machines */
spawnedMachines.clear();
for (MachinesOList::iterator it = allMachines.begin();
it != allMachines.end(); ++it)
{
if ((*it)->i_isSessionSpawning())
spawnedMachines.push_back(*it);
}
cntSpawned = spawnedMachines.size();
LogFlowFunc(("UPDATE: spawned session count = %d\n", cntSpawned));
}
}
}
while (true);
}
while (0);
/* close the muxsem */
if (muxSem != NULLHANDLE)
::DosCloseMuxWaitSem(muxSem);
/* release sets of machines if any */
machines.clear();
spawnedMachines.clear();
#elif defined(VBOX_WITH_SYS_V_IPC_SESSION_WATCHER)
bool update = false;
bool updateSpawned = false;
do
{
AutoCaller autoCaller(that->mVirtualBox);
if (!autoCaller.isOk())
break;
do
{
/* release the caller to let uninit() ever proceed */
autoCaller.release();
/* determine wait timeout adaptively: after updating information
* relevant to the client watcher, check a few times more
* frequently. This ensures good reaction time when the signalling
* has to be done a bit before the actual change for technical
* reasons, and saves CPU cycles when no activities are expected. */
RTMSINTERVAL cMillies;
{
uint8_t uOld, uNew;
do
{
uOld = ASMAtomicUoReadU8(&that->mUpdateAdaptCtr);
uNew = uOld ? uOld - 1 : uOld;
} while (!ASMAtomicCmpXchgU8(&that->mUpdateAdaptCtr, uNew, uOld));
Assert(uOld <= RT_ELEMENTS(s_aUpdateTimeoutSteps) - 1);
cMillies = s_aUpdateTimeoutSteps[uOld];
}
int rc = RTSemEventWait(that->mUpdateReq, cMillies);
/*
* Restore the caller before using VirtualBox. If it fails, this
* means VirtualBox is being uninitialized and we must terminate.
*/
autoCaller.add();
if (!autoCaller.isOk())
break;
if (RT_SUCCESS(rc) || update || updateSpawned)
{
/* RT_SUCCESS(rc) means an update event is signaled */
// get reference to the machines list in VirtualBox
VirtualBox::MachinesOList &allMachines = that->mVirtualBox->i_getMachinesList();
// lock the machines list for reading
AutoReadLock thatLock(allMachines.getLockHandle() COMMA_LOCKVAL_SRC_POS);
if (RT_SUCCESS(rc) || update)
{
/* obtain a new set of opened machines */
machines.clear();
for (MachinesOList::iterator it = allMachines.begin();
it != allMachines.end();
++it)
{
ComObjPtr<SessionMachine> sm;
if ((*it)->i_isSessionOpenOrClosing(sm))
machines.push_back(sm);
}
cnt = machines.size();
LogFlowFunc(("UPDATE: direct session count = %d\n", cnt));
}
if (RT_SUCCESS(rc) || updateSpawned)
{
/* obtain a new set of spawned machines */
spawnedMachines.clear();
for (MachinesOList::iterator it = allMachines.begin();
it != allMachines.end();
++it)
{
if ((*it)->i_isSessionSpawning())
spawnedMachines.push_back(*it);
}
cntSpawned = spawnedMachines.size();
LogFlowFunc(("UPDATE: spawned session count = %d\n", cntSpawned));
}
// machines lock unwinds here
}
update = false;
for (size_t i = 0; i < cnt; ++i)
update |= (machines[i])->i_checkForDeath();
updateSpawned = false;
for (size_t i = 0; i < cntSpawned; ++i)
updateSpawned |= (spawnedMachines[i])->i_checkForSpawnFailure();
/* reap child processes */
{
AutoWriteLock alock(that->mLock COMMA_LOCKVAL_SRC_POS);
if (that->mProcesses.size())
{
LogFlowFunc(("UPDATE: child process count = %d\n",
that->mProcesses.size()));
VirtualBox::ClientWatcher::ProcessList::iterator it = that->mProcesses.begin();
while (it != that->mProcesses.end())
{
RTPROCESS pid = *it;
RTPROCSTATUS status;
int vrc = ::RTProcWait(pid, RTPROCWAIT_FLAGS_NOBLOCK, &status);
if (vrc == VINF_SUCCESS)
{
if ( status.enmReason != RTPROCEXITREASON_NORMAL
|| status.iStatus != RTEXITCODE_SUCCESS)
{
switch (status.enmReason)
{
default:
case RTPROCEXITREASON_NORMAL:
LogRel(("Reaper: Pid %d (%x) exited normally: %d (%#x)\n",
pid, pid, status.iStatus, status.iStatus));
break;
case RTPROCEXITREASON_ABEND:
LogRel(("Reaper: Pid %d (%x) abended: %d (%#x)\n",
pid, pid, status.iStatus, status.iStatus));
break;
case RTPROCEXITREASON_SIGNAL:
LogRel(("Reaper: Pid %d (%x) was signalled: %d (%#x)\n",
pid, pid, status.iStatus, status.iStatus));
break;
}
}
else
LogFlowFunc(("pid %d (%x) was reaped, status=%d, reason=%d\n",
pid, pid, status.iStatus,
status.enmReason));
it = that->mProcesses.erase(it);
}
else
{
LogFlowFunc(("pid %d (%x) was NOT reaped, vrc=%Rrc\n",
pid, pid, vrc));
if (vrc != VERR_PROCESS_RUNNING)
{
/* remove the process if it is not already running */
it = that->mProcesses.erase(it);
}
else
++it;
}
}
}
}
}
while (true);
}
while (0);
/* release sets of machines if any */
machines.clear();
spawnedMachines.clear();
#elif defined(VBOX_WITH_GENERIC_SESSION_WATCHER)
bool updateSpawned = false;
do
{
AutoCaller autoCaller(that->mVirtualBox);
if (!autoCaller.isOk())
break;
do
{
/* release the caller to let uninit() ever proceed */
autoCaller.release();
/* determine wait timeout adaptively: after updating information
* relevant to the client watcher, check a few times more
* frequently. This ensures good reaction time when the signalling
* has to be done a bit before the actual change for technical
* reasons, and saves CPU cycles when no activities are expected. */
RTMSINTERVAL cMillies;
{
uint8_t uOld, uNew;
do
{
uOld = ASMAtomicUoReadU8(&that->mUpdateAdaptCtr);
uNew = uOld ? uOld - 1 : uOld;
} while (!ASMAtomicCmpXchgU8(&that->mUpdateAdaptCtr, uNew, uOld));
Assert(uOld <= RT_ELEMENTS(s_aUpdateTimeoutSteps) - 1);
cMillies = s_aUpdateTimeoutSteps[uOld];
}
int rc = RTSemEventWait(that->mUpdateReq, cMillies);
/*
* Restore the caller before using VirtualBox. If it fails, this
* means VirtualBox is being uninitialized and we must terminate.
*/
autoCaller.add();
if (!autoCaller.isOk())
break;
/** @todo this quite big effort for catching machines in spawning
* state which can't be caught by the token mechanism (as the token
* can't be in the other process yet) could be eliminated if the
* reaping is made smarter, having cross-reference information
* from the pid to the corresponding machine object. Both cases do
* more or less the same thing anyway. */
if (RT_SUCCESS(rc) || updateSpawned)
{
/* RT_SUCCESS(rc) means an update event is signaled */
// get reference to the machines list in VirtualBox
VirtualBox::MachinesOList &allMachines = that->mVirtualBox->i_getMachinesList();
// lock the machines list for reading
AutoReadLock thatLock(allMachines.getLockHandle() COMMA_LOCKVAL_SRC_POS);
if (RT_SUCCESS(rc) || updateSpawned)
{
/* obtain a new set of spawned machines */
spawnedMachines.clear();
for (MachinesOList::iterator it = allMachines.begin();
it != allMachines.end();
++it)
{
if ((*it)->i_isSessionSpawning())
spawnedMachines.push_back(*it);
}
cntSpawned = spawnedMachines.size();
LogFlowFunc(("UPDATE: spawned session count = %d\n", cntSpawned));
}
NOREF(cnt);
// machines lock unwinds here
}
updateSpawned = false;
for (size_t i = 0; i < cntSpawned; ++i)
updateSpawned |= (spawnedMachines[i])->i_checkForSpawnFailure();
/* reap child processes */
{
AutoWriteLock alock(that->mLock COMMA_LOCKVAL_SRC_POS);
if (that->mProcesses.size())
{
LogFlowFunc(("UPDATE: child process count = %d\n",
that->mProcesses.size()));
VirtualBox::ClientWatcher::ProcessList::iterator it = that->mProcesses.begin();
while (it != that->mProcesses.end())
{
RTPROCESS pid = *it;
RTPROCSTATUS status;
int vrc = ::RTProcWait(pid, RTPROCWAIT_FLAGS_NOBLOCK, &status);
if (vrc == VINF_SUCCESS)
{
if ( status.enmReason != RTPROCEXITREASON_NORMAL
|| status.iStatus != RTEXITCODE_SUCCESS)
{
switch (status.enmReason)
{
default:
case RTPROCEXITREASON_NORMAL:
LogRel(("Reaper: Pid %d (%x) exited normally: %d (%#x)\n",
pid, pid, status.iStatus, status.iStatus));
break;
case RTPROCEXITREASON_ABEND:
LogRel(("Reaper: Pid %d (%x) abended: %d (%#x)\n",
pid, pid, status.iStatus, status.iStatus));
break;
case RTPROCEXITREASON_SIGNAL:
LogRel(("Reaper: Pid %d (%x) was signalled: %d (%#x)\n",
pid, pid, status.iStatus, status.iStatus));
break;
}
}
else
LogFlowFunc(("pid %d (%x) was reaped, status=%d, reason=%d\n",
pid, pid, status.iStatus,
status.enmReason));
it = that->mProcesses.erase(it);
}
else
{
LogFlowFunc(("pid %d (%x) was NOT reaped, vrc=%Rrc\n",
pid, pid, vrc));
if (vrc != VERR_PROCESS_RUNNING)
{
/* remove the process if it is not already running */
it = that->mProcesses.erase(it);
}
else
++it;
}
}
}
}
}
while (true);
}
while (0);
/* release sets of machines if any */
machines.clear();
spawnedMachines.clear();
#else
# error "Port me!"
#endif
VirtualBoxBase::uninitializeComForThread();
LogFlowFuncLeave();
return 0;
}
/*static*/
DECLCALLBACK(int) VirtualBox::ClientWatcher::worker(RTTHREAD hThreadSelf, void *pvUser)
{
LogFlowFuncEnter();
NOREF(hThreadSelf);
VirtualBox::ClientWatcher *that = (VirtualBox::ClientWatcher *)pvUser;
Assert(that);
typedef std::vector<ComObjPtr<Machine> > MachineVector;
typedef std::vector<ComObjPtr<SessionMachine> > SessionMachineVector;
SessionMachineVector machines;
MachineVector spawnedMachines;
size_t cnt = 0;
size_t cntSpawned = 0;
VirtualBoxBase::initializeComForThread();
#if defined(RT_OS_WINDOWS)
int vrc;
/* Initialize all the subworker data. */
that->maSubworkers[0].hThread = hThreadSelf;
for (uint32_t iSubworker = 1; iSubworker < RT_ELEMENTS(that->maSubworkers); iSubworker++)
that->maSubworkers[iSubworker].hThread = NIL_RTTHREAD;
for (uint32_t iSubworker = 0; iSubworker < RT_ELEMENTS(that->maSubworkers); iSubworker++)
{
that->maSubworkers[iSubworker].pSelf = that;
that->maSubworkers[iSubworker].iSubworker = iSubworker;
}
do
{
/* VirtualBox has been early uninitialized, terminate. */
AutoCaller autoCaller(that->mVirtualBox);
if (!autoCaller.isOk())
break;
bool fPidRace = false; /* We poll if the PID of a spawning session hasn't been established yet. */
bool fRecentDeath = false; /* We slowly poll if a session has recently been closed to do reaping. */
for (;;)
{
/* release the caller to let uninit() ever proceed */
autoCaller.release();
/* Kick of the waiting. */
uint32_t const cSubworkers = (that->mcWaitHandles + CW_MAX_HANDLES_PER_THREAD - 1) / CW_MAX_HANDLES_PER_THREAD;
uint32_t const cMsWait = fPidRace ? 500 : fRecentDeath ? 5000 : INFINITE;
LogFlowFunc(("UPDATE: Waiting. %u handles, %u subworkers, %u ms wait\n", that->mcWaitHandles, cSubworkers, cMsWait));
that->mcMsWait = cMsWait;
ASMAtomicWriteU32(&that->mcActiveSubworkers, cSubworkers);
RTThreadUserReset(hThreadSelf);
for (uint32_t iSubworker = 1; iSubworker < cSubworkers; iSubworker++)
{
if (that->maSubworkers[iSubworker].hThread != NIL_RTTHREAD)
{
vrc = RTThreadUserSignal(that->maSubworkers[iSubworker].hThread);
AssertLogRelMsg(RT_SUCCESS(vrc), ("RTThreadUserSignal -> %Rrc\n", vrc));
}
else
{
vrc = RTThreadCreateF(&that->maSubworkers[iSubworker].hThread,
VirtualBox::ClientWatcher::subworkerThread, &that->maSubworkers[iSubworker],
_128K, RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE, "Watcher%u", iSubworker);
AssertLogRelMsgStmt(RT_SUCCESS(vrc), ("%Rrc iSubworker=%u\n", vrc, iSubworker),
that->maSubworkers[iSubworker].hThread = NIL_RTTHREAD);
}
if (RT_FAILURE(vrc))
that->subworkerWait(&that->maSubworkers[iSubworker], 1);
}
/* Wait ourselves. */
that->subworkerWait(&that->maSubworkers[0], cMsWait);
/* Make sure all waiters are done waiting. */
BOOL fRc = SetEvent(that->mUpdateReq);
Assert(fRc); NOREF(fRc);
vrc = RTThreadUserWait(hThreadSelf, RT_INDEFINITE_WAIT);
AssertLogRelMsg(RT_SUCCESS(vrc), ("RTThreadUserWait -> %Rrc\n", vrc));
Assert(that->mcActiveSubworkers == 0);
/* Consume pending update request before proceeding with processing the wait results. */
fRc = ResetEvent(that->mUpdateReq);
Assert(fRc);
bool update = ASMAtomicXchgBool(&that->mfUpdateReq, false);
if (update)
LogFlowFunc(("UPDATE: Update request pending\n"));
update |= fPidRace;
/* Process the wait results. */
autoCaller.add();
if (!autoCaller.isOk())
break;
fRecentDeath = false;
for (uint32_t iSubworker = 0; iSubworker < cSubworkers; iSubworker++)
{
DWORD dwWait = that->maSubworkers[iSubworker].dwWait;
LogFlowFunc(("UPDATE: subworker #%u: dwWait=%#x\n", iSubworker, dwWait));
if ( (dwWait > WAIT_OBJECT_0 && dwWait < WAIT_OBJECT_0 + CW_MAX_HANDLES_PER_THREAD)
|| (dwWait > WAIT_ABANDONED_0 && dwWait < WAIT_ABANDONED_0 + CW_MAX_HANDLES_PER_THREAD) )
{
uint32_t idxHandle = iSubworker * CW_MAX_HANDLES_PER_THREAD;
if (dwWait > WAIT_OBJECT_0 && dwWait < WAIT_OBJECT_0 + CW_MAX_HANDLES_PER_THREAD)
idxHandle += dwWait - WAIT_OBJECT_0;
else
idxHandle += dwWait - WAIT_ABANDONED_0;
uint32_t const idxMachine = idxHandle - (iSubworker + 1);
if (idxMachine < cnt)
{
/* Machine mutex is released or abandond due to client process termination. */
LogFlowFunc(("UPDATE: Calling i_checkForDeath on idxMachine=%u (idxHandle=%u) dwWait=%#x\n",
idxMachine, idxHandle, dwWait));
fRecentDeath |= (machines[idxMachine])->i_checkForDeath();
}
else if (idxMachine < cnt + cntSpawned)
{
/* Spawned VM process has terminated normally. */
Assert(dwWait < WAIT_ABANDONED_0);
LogFlowFunc(("UPDATE: Calling i_checkForSpawnFailure on idxMachine=%u/%u idxHandle=%u dwWait=%#x\n",
idxMachine, idxMachine - cnt, idxHandle, dwWait));
fRecentDeath |= (spawnedMachines[idxMachine - cnt])->i_checkForSpawnFailure();
}
else
AssertFailed();
update = true;
}
else
Assert(dwWait == WAIT_OBJECT_0 || dwWait == WAIT_TIMEOUT);
}
if (update)
{
LogFlowFunc(("UPDATE: Update pending (cnt=%u cntSpawned=%u)...\n", cnt, cntSpawned));
/* close old process handles */
that->winResetHandleArray((uint32_t)cntSpawned);
// get reference to the machines list in VirtualBox
VirtualBox::MachinesOList &allMachines = that->mVirtualBox->i_getMachinesList();
// lock the machines list for reading
AutoReadLock thatLock(allMachines.getLockHandle() COMMA_LOCKVAL_SRC_POS);
/* obtain a new set of opened machines */
cnt = 0;
machines.clear();
uint32_t idxHandle = 0;
for (MachinesOList::iterator it = allMachines.begin();
it != allMachines.end();
++it)
{
AssertMsgBreak(idxHandle < CW_MAX_CLIENTS, ("CW_MAX_CLIENTS reached"));
ComObjPtr<SessionMachine> sm;
if ((*it)->i_isSessionOpenOrClosing(sm))
{
AutoCaller smCaller(sm);
if (smCaller.isOk())
{
AutoReadLock smLock(sm COMMA_LOCKVAL_SRC_POS);
Machine::ClientToken *ct = sm->i_getClientToken();
if (ct)
{
HANDLE ipcSem = ct->getToken();
machines.push_back(sm);
if (!(idxHandle % CW_MAX_HANDLES_PER_THREAD))
idxHandle++;
that->mahWaitHandles[idxHandle++] = ipcSem;
++cnt;
}
}
}
}
LogFlowFunc(("UPDATE: direct session count = %d\n", cnt));
/* obtain a new set of spawned machines */
fPidRace = false;
cntSpawned = 0;
spawnedMachines.clear();
for (MachinesOList::iterator it = allMachines.begin();
it != allMachines.end();
++it)
{
AssertMsgBreak(idxHandle < CW_MAX_CLIENTS, ("CW_MAX_CLIENTS reached"));
if ((*it)->i_isSessionSpawning())
{
ULONG pid;
HRESULT hrc = (*it)->COMGETTER(SessionPID)(&pid);
if (SUCCEEDED(hrc))
{
if (pid != NIL_RTPROCESS)
{
HANDLE hProc = OpenProcess(SYNCHRONIZE, FALSE, pid);
AssertMsg(hProc != NULL, ("OpenProcess (pid=%d) failed with %d\n", pid, GetLastError()));
if (hProc != NULL)
{
spawnedMachines.push_back(*it);
if (!(idxHandle % CW_MAX_HANDLES_PER_THREAD))
idxHandle++;
that->mahWaitHandles[idxHandle++] = hProc;
++cntSpawned;
}
}
else
fPidRace = true;
}
}
}
LogFlowFunc(("UPDATE: spawned session count = %d\n", cntSpawned));
/* Update mcWaitHandles and make sure there is at least one handle to wait on. */
that->mcWaitHandles = RT_MAX(idxHandle, 1);
// machines lock unwinds here
}
else
LogFlowFunc(("UPDATE: No update pending.\n"));
/* reap child processes */
that->reapProcesses();
} /* for ever (well, till autoCaller fails). */
} while (0);
/* Terminate subworker threads. */
ASMAtomicWriteBool(&that->mfTerminate, true);
for (uint32_t iSubworker = 1; iSubworker < RT_ELEMENTS(that->maSubworkers); iSubworker++)
if (that->maSubworkers[iSubworker].hThread != NIL_RTTHREAD)
RTThreadUserSignal(that->maSubworkers[iSubworker].hThread);
for (uint32_t iSubworker = 1; iSubworker < RT_ELEMENTS(that->maSubworkers); iSubworker++)
if (that->maSubworkers[iSubworker].hThread != NIL_RTTHREAD)
{
vrc = RTThreadWait(that->maSubworkers[iSubworker].hThread, RT_MS_1MIN, NULL /*prc*/);
if (RT_SUCCESS(vrc))
that->maSubworkers[iSubworker].hThread = NIL_RTTHREAD;
else
AssertLogRelMsgFailed(("RTThreadWait -> %Rrc\n", vrc));
}
/* close old process handles */
that->winResetHandleArray((uint32_t)cntSpawned);
/* release sets of machines if any */
machines.clear();
spawnedMachines.clear();
::CoUninitialize();
#elif defined(RT_OS_OS2)
/* according to PMREF, 64 is the maximum for the muxwait list */
SEMRECORD handles[64];
HMUX muxSem = NULLHANDLE;
do
{
AutoCaller autoCaller(that->mVirtualBox);
/* VirtualBox has been early uninitialized, terminate */
if (!autoCaller.isOk())
break;
for (;;)
{
/* release the caller to let uninit() ever proceed */
autoCaller.release();
int vrc = RTSemEventWait(that->mUpdateReq, 500);
/* Restore the caller before using VirtualBox. If it fails, this
* means VirtualBox is being uninitialized and we must terminate. */
autoCaller.add();
if (!autoCaller.isOk())
break;
bool update = false;
bool updateSpawned = false;
if (RT_SUCCESS(vrc))
{
/* update event is signaled */
update = true;
updateSpawned = true;
}
else
{
AssertMsg(vrc == VERR_TIMEOUT || vrc == VERR_INTERRUPTED,
("RTSemEventWait returned %Rrc\n", vrc));
/* are there any mutexes? */
if (cnt > 0)
{
/* figure out what's going on with machines */
unsigned long semId = 0;
APIRET arc = ::DosWaitMuxWaitSem(muxSem,
SEM_IMMEDIATE_RETURN, &semId);
if (arc == NO_ERROR)
{
/* machine mutex is normally released */
Assert(semId >= 0 && semId < cnt);
if (semId >= 0 && semId < cnt)
{
#if 0//def DEBUG
{
AutoReadLock machineLock(machines[semId] COMMA_LOCKVAL_SRC_POS);
LogFlowFunc(("released mutex: machine='%ls'\n",
machines[semId]->name().raw()));
}
#endif
machines[semId]->i_checkForDeath();
}
update = true;
}
else if (arc == ERROR_SEM_OWNER_DIED)
{
/* machine mutex is abandoned due to client process
* termination; find which mutex is in the Owner Died
* state */
for (size_t i = 0; i < cnt; ++i)
{
PID pid; TID tid;
unsigned long reqCnt;
arc = DosQueryMutexSem((HMTX)handles[i].hsemCur, &pid, &tid, &reqCnt);
if (arc == ERROR_SEM_OWNER_DIED)
{
/* close the dead mutex as asked by PMREF */
::DosCloseMutexSem((HMTX)handles[i].hsemCur);
Assert(i >= 0 && i < cnt);
if (i >= 0 && i < cnt)
{
#if 0//def DEBUG
{
AutoReadLock machineLock(machines[semId] COMMA_LOCKVAL_SRC_POS);
LogFlowFunc(("mutex owner dead: machine='%ls'\n",
machines[i]->name().raw()));
}
#endif
machines[i]->i_checkForDeath();
}
}
}
update = true;
}
else
AssertMsg(arc == ERROR_INTERRUPT || arc == ERROR_TIMEOUT,
("DosWaitMuxWaitSem returned %d\n", arc));
}
/* are there any spawning sessions? */
if (cntSpawned > 0)
{
for (size_t i = 0; i < cntSpawned; ++i)
updateSpawned |= (spawnedMachines[i])->
i_checkForSpawnFailure();
}
}
if (update || updateSpawned)
{
// get reference to the machines list in VirtualBox
VirtualBox::MachinesOList &allMachines = that->mVirtualBox->i_getMachinesList();
// lock the machines list for reading
AutoReadLock thatLock(allMachines.getLockHandle() COMMA_LOCKVAL_SRC_POS);
if (update)
{
/* close the old muxsem */
if (muxSem != NULLHANDLE)
::DosCloseMuxWaitSem(muxSem);
/* obtain a new set of opened machines */
cnt = 0;
machines.clear();
for (MachinesOList::iterator it = allMachines.begin();
it != allMachines.end(); ++it)
{
/// @todo handle situations with more than 64 objects
AssertMsg(cnt <= 64 /* according to PMREF */,
("maximum of 64 mutex semaphores reached (%d)",
cnt));
ComObjPtr<SessionMachine> sm;
if ((*it)->i_isSessionOpenOrClosing(sm))
{
AutoCaller smCaller(sm);
if (smCaller.isOk())
{
AutoReadLock smLock(sm COMMA_LOCKVAL_SRC_POS);
ClientToken *ct = sm->i_getClientToken();
if (ct)
{
HMTX ipcSem = ct->getToken();
machines.push_back(sm);
handles[cnt].hsemCur = (HSEM)ipcSem;
handles[cnt].ulUser = cnt;
++cnt;
}
}
}
}
LogFlowFunc(("UPDATE: direct session count = %d\n", cnt));
if (cnt > 0)
{
/* create a new muxsem */
APIRET arc = ::DosCreateMuxWaitSem(NULL, &muxSem, cnt,
handles,
DCMW_WAIT_ANY);
AssertMsg(arc == NO_ERROR,
("DosCreateMuxWaitSem returned %d\n", arc));
NOREF(arc);
}
}
if (updateSpawned)
{
/* obtain a new set of spawned machines */
spawnedMachines.clear();
for (MachinesOList::iterator it = allMachines.begin();
it != allMachines.end(); ++it)
{
if ((*it)->i_isSessionSpawning())
spawnedMachines.push_back(*it);
}
cntSpawned = spawnedMachines.size();
LogFlowFunc(("UPDATE: spawned session count = %d\n", cntSpawned));
}
}
/* reap child processes */
that->reapProcesses();
} /* for ever (well, till autoCaller fails). */
} while (0);
/* close the muxsem */
if (muxSem != NULLHANDLE)
::DosCloseMuxWaitSem(muxSem);
/* release sets of machines if any */
machines.clear();
spawnedMachines.clear();
#elif defined(VBOX_WITH_SYS_V_IPC_SESSION_WATCHER)
bool update = false;
bool updateSpawned = false;
do
{
AutoCaller autoCaller(that->mVirtualBox);
if (!autoCaller.isOk())
break;
do
{
/* release the caller to let uninit() ever proceed */
autoCaller.release();
/* determine wait timeout adaptively: after updating information
* relevant to the client watcher, check a few times more
* frequently. This ensures good reaction time when the signalling
* has to be done a bit before the actual change for technical
* reasons, and saves CPU cycles when no activities are expected. */
RTMSINTERVAL cMillies;
{
uint8_t uOld, uNew;
do
{
uOld = ASMAtomicUoReadU8(&that->mUpdateAdaptCtr);
uNew = uOld ? uOld - 1 : uOld;
} while (!ASMAtomicCmpXchgU8(&that->mUpdateAdaptCtr, uNew, uOld));
Assert(uOld <= RT_ELEMENTS(s_aUpdateTimeoutSteps) - 1);
cMillies = s_aUpdateTimeoutSteps[uOld];
}
int rc = RTSemEventWait(that->mUpdateReq, cMillies);
/*
* Restore the caller before using VirtualBox. If it fails, this
* means VirtualBox is being uninitialized and we must terminate.
*/
autoCaller.add();
if (!autoCaller.isOk())
break;
if (RT_SUCCESS(rc) || update || updateSpawned)
{
/* RT_SUCCESS(rc) means an update event is signaled */
// get reference to the machines list in VirtualBox
VirtualBox::MachinesOList &allMachines = that->mVirtualBox->i_getMachinesList();
// lock the machines list for reading
AutoReadLock thatLock(allMachines.getLockHandle() COMMA_LOCKVAL_SRC_POS);
if (RT_SUCCESS(rc) || update)
{
/* obtain a new set of opened machines */
machines.clear();
for (MachinesOList::iterator it = allMachines.begin();
it != allMachines.end();
++it)
{
ComObjPtr<SessionMachine> sm;
if ((*it)->i_isSessionOpenOrClosing(sm))
machines.push_back(sm);
}
cnt = machines.size();
LogFlowFunc(("UPDATE: direct session count = %d\n", cnt));
}
if (RT_SUCCESS(rc) || updateSpawned)
{
/* obtain a new set of spawned machines */
spawnedMachines.clear();
for (MachinesOList::iterator it = allMachines.begin();
it != allMachines.end();
++it)
{
if ((*it)->i_isSessionSpawning())
spawnedMachines.push_back(*it);
}
cntSpawned = spawnedMachines.size();
LogFlowFunc(("UPDATE: spawned session count = %d\n", cntSpawned));
}
// machines lock unwinds here
}
update = false;
for (size_t i = 0; i < cnt; ++i)
update |= (machines[i])->i_checkForDeath();
updateSpawned = false;
for (size_t i = 0; i < cntSpawned; ++i)
updateSpawned |= (spawnedMachines[i])->i_checkForSpawnFailure();
/* reap child processes */
that->reapProcesses();
}
while (true);
}
while (0);
/* release sets of machines if any */
machines.clear();
spawnedMachines.clear();
#elif defined(VBOX_WITH_GENERIC_SESSION_WATCHER)
bool updateSpawned = false;
do
{
AutoCaller autoCaller(that->mVirtualBox);
if (!autoCaller.isOk())
break;
do
{
/* release the caller to let uninit() ever proceed */
autoCaller.release();
/* determine wait timeout adaptively: after updating information
* relevant to the client watcher, check a few times more
* frequently. This ensures good reaction time when the signalling
* has to be done a bit before the actual change for technical
* reasons, and saves CPU cycles when no activities are expected. */
RTMSINTERVAL cMillies;
{
uint8_t uOld, uNew;
do
{
uOld = ASMAtomicUoReadU8(&that->mUpdateAdaptCtr);
uNew = uOld ? (uint8_t)(uOld - 1) : uOld;
} while (!ASMAtomicCmpXchgU8(&that->mUpdateAdaptCtr, uNew, uOld));
Assert(uOld <= RT_ELEMENTS(s_aUpdateTimeoutSteps) - 1);
cMillies = s_aUpdateTimeoutSteps[uOld];
}
int rc = RTSemEventWait(that->mUpdateReq, cMillies);
/*
* Restore the caller before using VirtualBox. If it fails, this
* means VirtualBox is being uninitialized and we must terminate.
*/
autoCaller.add();
if (!autoCaller.isOk())
break;
/** @todo this quite big effort for catching machines in spawning
* state which can't be caught by the token mechanism (as the token
* can't be in the other process yet) could be eliminated if the
* reaping is made smarter, having cross-reference information
* from the pid to the corresponding machine object. Both cases do
* more or less the same thing anyway. */
if (RT_SUCCESS(rc) || updateSpawned)
{
/* RT_SUCCESS(rc) means an update event is signaled */
// get reference to the machines list in VirtualBox
VirtualBox::MachinesOList &allMachines = that->mVirtualBox->i_getMachinesList();
// lock the machines list for reading
AutoReadLock thatLock(allMachines.getLockHandle() COMMA_LOCKVAL_SRC_POS);
if (RT_SUCCESS(rc) || updateSpawned)
{
/* obtain a new set of spawned machines */
spawnedMachines.clear();
for (MachinesOList::iterator it = allMachines.begin();
it != allMachines.end();
++it)
{
if ((*it)->i_isSessionSpawning())
spawnedMachines.push_back(*it);
}
cntSpawned = spawnedMachines.size();
LogFlowFunc(("UPDATE: spawned session count = %d\n", cntSpawned));
}
NOREF(cnt);
// machines lock unwinds here
}
updateSpawned = false;
for (size_t i = 0; i < cntSpawned; ++i)
updateSpawned |= (spawnedMachines[i])->i_checkForSpawnFailure();
/* reap child processes */
that->reapProcesses();
}
while (true);
}
while (0);
/* release sets of machines if any */
machines.clear();
spawnedMachines.clear();
#else
# error "Port me!"
#endif
VirtualBoxBase::uninitializeComForThread();
LogFlowFuncLeave();
return 0;
}
