Process::cb_ret_t Backend::handleTimeEvent() {
// Get all subscribed events
set<Event*>& events = Time::getTimeSubscribers();
set<Event*>::iterator eventIter = events.begin();
for(;eventIter != events.end(); eventIter++) {
Event* event = *eventIter;
ProcessSet::ptr procset = ((Time *)event)->getProcset();
ProcessSet::iterator procIter = procset->begin();
if(procset->size() == 0)
continue;
if(!event || !event->isEnabled(*procIter))
continue; // this is to avoid a race condition where a time event occurs in the middle of iterating through the processes
DYSECTVERBOSE(true, "Time event with timeout %d detected on %d processes", ((Time *)event)->getTimeout(), procset->size());
for(;procIter != procset->end(); procIter++) {
Process::ptr procPtr = *procIter;
if(event && event->isEnabled(procPtr)) {
Thread::ptr threadPtr = procPtr->threads().getInitialThread();
Walker *proc = (Walker *)procPtr->getData();
handleEvent(procPtr, threadPtr, event);
}
}
if(event->getOwner()->getLifeSpan() == fireOnce)
event->disable();
}
return Process::cbDefault;
}
bool Location::disable(ProcessSet::ptr lprocset) {
assert(owner != 0);
if(codeLocations.empty()) {
return Err::verbose(true, "No code locations");
}
if(!lprocset) {
return Err::warn(false, "Process set not present");
}
ProcessSet::iterator procIter = lprocset->begin();
for(;procIter != lprocset->end(); procIter++) {
Process::ptr procPtr = *procIter;
Walker* proc = (Walker*)procPtr->getData();
vector<DysectAPI::CodeLocation*>::iterator locationIter = codeLocations.begin();
for(;locationIter != codeLocations.end(); locationIter++) {
DysectAPI::CodeLocation* location = *locationIter;
if(!location->addProcLib(proc)) {
return Err::warn(false, "Symbol not found in process");
}
vector<Dyninst::Address> addrs;
if(!location->getAddrs(proc, addrs) || addrs.empty()) {
return Err::warn(false, "Addresses for symbol could not be determined");
}
// Breakpoint locations at hand
for(int i = 0; i < addrs.size() ; i++) {
Dyninst::Address addr = addrs[i];
if(!procPtr->rmBreakpoint(addr, bp)) {
Err::verbose(false, "Breakpoint not removed! %s", ProcControlAPI::getLastErrorMsg());
}
}
}
}
return true;
}
ProcessSet::ptr ProcessMgr::filterExited(ProcessSet::ptr inSet) {
if(!inSet)
return inSet;
if(inSet->empty())
return inSet;
ProcessSet::ptr procs = ProcessSet::newProcessSet();
// Filter out exited processes
ProcessSet::iterator procIter = inSet->begin();
for(; procIter != inSet->end(); procIter++) {
Process::ptr process = *procIter;
if(process->isTerminated() || process->isExited() || process->isCrashed() || process->isDetached()) {
continue;
}
procs->insert(process);
}
return procs;
}
bool Location::enable(ProcessSet::ptr lprocset) {
assert(owner != 0);
if(codeLocations.empty()) {
return Err::verbose(true, "No code locations");
}
if(!lprocset) {
return Err::warn(false, "Process set not present");
}
ProcessSet::iterator procIter = lprocset->begin();
AddressSet::ptr addrset = AddressSet::newAddressSet();
if(lprocset->size() <= 0) {
return Err::info(true, "Process set empty!");
}
// Find library location for target processes
for(;procIter != lprocset->end(); procIter++) {
Process::ptr procPtr = *procIter;
Walker* proc = (Walker*)procPtr->getData();
vector<DysectAPI::CodeLocation*>::iterator locationIter = codeLocations.begin();
for(;locationIter != codeLocations.end(); locationIter++) {
DysectAPI::CodeLocation* location = *locationIter;
if(!location->addProcLib(proc)) {
return Err::warn(false, "Symbol not found in process");
}
vector<Dyninst::Address> addrs;
if(!location->getAddrs(proc, addrs) || addrs.empty()) {
return Err::warn(false, "Addresses for symbol could not be determined");
}
// Breakpoint locations at hand
for(int i = 0; i < addrs.size() ; i++) {
Dyninst::Address addr = addrs[i];
if(!procPtr->addBreakpoint(addr, bp)) {
return Err::verbose(false, "Breakpoint not installed: %s", ProcControlAPI::getLastErrorMsg());
} else {
Err::verbose(true, "Breakpoint installed at %lx", addr);
}
//addrset->insert(addr, procPtr);
}
//if(addrs.empty()) {
// Err::verbose(true, "No addresses");
//}
}
}
//if(addrset->size() <= 0) {
// return Err::verbose(true, "Empty address set");
//}
//if(!lprocset->addBreakpoint(addrset, nbp)) {
// return Err::warn(false, "Could not insert breakpoints!");
//} else {
// Err::info(true, "%d breakpoints inserted in %d processes", addrset->size(), lprocset->size());
//}
return true;
}
bool Probe::processRequests() {
if(requestQueue.empty()) {
return true;
}
pthread_mutex_lock(&requestQueueMutex);
vector<ProbeRequest*> queue = requestQueue;
requestQueue.clear();
pthread_mutex_unlock(&requestQueueMutex);
ProcessSet::ptr continueSet = ProcessSet::newProcessSet();
// Sort queue
deque<ProbeRequest*> sortedQueue;
vector<ProbeRequest*>::iterator requestIter = queue.begin();
for(int i = 0; requestIter != queue.end(); requestIter++) {
ProbeRequest* request = *requestIter;
if(!request) {
DYSECTWARN(true, "Invalid request in request queue");
break;
}
if(request->type == DisableType) {
sortedQueue.push_back(request);
} else {
sortedQueue.push_front(request);
}
}
if (sortedQueue.size() == 0)
return true;
DYSECTVERBOSE(true, "Handling %d process requests", sortedQueue.size());
deque<ProbeRequest*>::iterator sortedRequestIter = sortedQueue.begin();
for(int i = 0; sortedRequestIter != sortedQueue.end(); sortedRequestIter++) {
ProbeRequest* request = *sortedRequestIter;
if(!request) {
DYSECTWARN(true, "Invalid request in request queue");
break;
}
DYSECTVERBOSE(true, "processRequests() %d", i++);
Probe* probe = request->probe;
if(!probe) {
DYSECTWARN(false, "Probe not found for disable request!");
break;
}
ProcessSet::ptr waitingProcs = request->scope;
if(waitingProcs && waitingProcs->size() > 0) {
DYSECTVERBOSE(true, "Adding %d request processes to %d continue set...", waitingProcs->size(), continueSet->size());
continueSet = continueSet->set_union(waitingProcs);
}
ProcessSet::ptr operationSet = ProcessSet::newProcessSet();
ProcessSet::ptr stopSet = ProcessSet::newProcessSet();
ProcessSet::ptr scope = request->scope;
if(scope && scope->size() > 0) {
DYSECTVERBOSE(true, "Adding processes from scope set (%d) to affected procs (%d)", scope->size(), operationSet->size());
operationSet = operationSet->set_union(scope);
}
//
// Filter out detached
//
operationSet = ProcessMgr::filterDetached(operationSet);
stopSet = ProcessMgr::filterDetached(stopSet);
DYSECTVERBOSE(true, "%d procs in op set, %d procs in stop set", operationSet->size(), stopSet->size());
//
// Stop processes
//
stopSet = operationSet->getAnyThreadRunningSubset();
if(stopSet && stopSet->size() > 0) {
DYSECTVERBOSE(true, "Stopping %d processes", stopSet->size());
stopSet->stopProcs();
}
//
// Carry out operations
//
if(operationSet && operationSet->size() > 0) {
if(request->type == DisableType) {
DYSECTVERBOSE(true, "Disabling %d processes", operationSet->size());
probe->disable(operationSet);
} else {
DYSECTVERBOSE(true, "Enabling %d processes", operationSet->size());
probe->enableChildren(operationSet);
}
}
//
// Processes must be started when all operations have been carried out.
//
if(operationSet && operationSet->size() > 0) {
continueSet = continueSet->set_union(operationSet);
}
delete(request);
}
continueSet = ProcessMgr::filterDetached(continueSet);
if(continueSet && continueSet->size() > 0) {
DYSECTVERBOSE(true, "Continuing %d processes", continueSet->size());
if(continueSet->size() == 1) {
ProcessSet::iterator procIter = continueSet->begin();
Process::ptr process = *procIter;
DYSECTVERBOSE(true, "Continuing process %d", process->getPid());
}
continueSet->continueProcs();
}
DYSECTVERBOSE(true, "Done handling requests");
return true;
}
