bool StackCallback::beginStackWalk(Thread::ptr thr)
{
assert(!cur);
Process::ptr proc = thr->getProcess();
ProcessState *pstate = ProcessState::getProcessStateByPid(proc->getPid());
if (!pstate) {
sw_printf("[%s:%u] - Error, unknown process state for %d while starting stackwalk\n",
FILE__, __LINE__, proc->getPid());
return false;
}
cur_walker = pstate->getWalker();
cur = tree.getHead();
return true;
}
ProcDebug::ProcDebug(Process::ptr p) :
ProcessState(p->getPid()),
proc(p)
{
}
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;
}