void RestoreTarget::CreateProcess(CoordinatorAPI& coordinatorAPI,
SlidingFdTable& slidingFd)
{
//change UniquePid
UniquePid::resetOnFork(upid());
//UniquePid::ThisProcess(true) = _conToFd.upid();
Util::initializeLogFile(procname());
JTRACE("Creating process during restart") (upid()) (procname());
JTRACE("")(getpid())(getppid())(getsid(0));
ProcessInfo &pInfo = _processInfo;
pid_t psid = pInfo.sid();
JTRACE("Restore /proc/self/* fds");
ConnectionList& connections = ConnectionList::instance();
ConnectionList::iterator it;
for (it = connections.begin(); it != connections.end(); ++it) {
dmtcp::Connection *con = it->second;
if (con->subType() == FileConnection::FILE_PROCFS) {
dmtcp::FileConnection *filecon = (dmtcp::FileConnection*) con;
char buf[32];
dmtcp::vector<int> fds;
fds.push_back(slidingFd.getFdFor(con->id()));
sprintf(buf, "/proc/%d/", pInfo.pid());
if (dmtcp::Util::strStartsWith(filecon->filePath(), buf)) {
filecon->restore(fds);
}
}
}
if (!isSessionLeader()) {
// Restore Group information
restoreGroup(slidingFd);
// If process is not session leader, restore it and all children.
t_iterator it = _children.begin();
for (; it != _children.end(); it++) {
JTRACE ("Forking Child Process") ((*it)->upid());
pid_t cid = fork();
if (cid == 0) {
(*it)->CreateProcess (coordinatorAPI, slidingFd);
JASSERT (false) . Text ("Unreachable");
}
JASSERT (cid > 0);
}
} else {
// Process is session leader.
// There may be not setsid-ed children.
for (t_iterator it = _children.begin(); it != _children.end(); it++) {
s_iterator sit = (*it)->getSmap().find(psid);
JTRACE("Restore processes that were created before their parent called setsid()");
if (sit == (*it)->getSmap().end()) {
JTRACE ("Forking Child Process") ((*it)->upid());
pid_t cid = fork();
if (cid == 0) {
(*it)->CreateProcess (coordinatorAPI, slidingFd);
JASSERT (false) . Text ("Unreachable");
}
JASSERT (cid > 0);
}
}
pid_t nsid = setsid();
JTRACE("change SID")(nsid);
// Restore Group information
restoreGroup(slidingFd);
for (t_iterator it = _children.begin(); it != _children.end(); it++) {
JTRACE("Restore processes that was created after their parent called setsid()");
s_iterator sit = (*it)->getSmap().find(psid);
if (sit != (*it)->getSmap().end()) {
JTRACE ("Forking Child Process") ((*it)->upid());
pid_t cid = fork();
if (cid == 0) {
(*it)->CreateProcess (coordinatorAPI, slidingFd);
JASSERT (false) . Text ("Unreachable");
}
JASSERT (cid> 0);
}
}
for (t_iterator it = _roots.begin() ; it != _roots.end(); it++) {
JTRACE ("Forking Dependent Root Process") ((*it)->upid());
pid_t cid;
if ((cid = fork())) {
waitpid(cid, NULL, 0);
} else {
if (fork())
exit(0);
(*it)->CreateProcess(coordinatorAPI, slidingFd);
JASSERT (false) . Text("Unreachable");
}
}
}
bool isTheGroupLeader = isGroupLeader(); // Calls JTRACE;avoid recursion
JTRACE("Child and dependent root processes forked, restoring process")
(upid())(getpid())(isTheGroupLeader);
//Reconnect to dmtcp_coordinator
WorkerState::setCurrentState (WorkerState::RESTARTING);
coordinatorAPI.connectToCoordinator();
coordinatorAPI.sendCoordinatorHandshake(procname(), _processInfo.compGroup());
coordinatorAPI.recvCoordinatorHandshake();
//restart targets[i]
dupAllSockets (slidingFd);
mtcpRestart();
JASSERT (false).Text ("unreachable");
}
