void createProcess(bool createIndependentRootProcesses = false)
{
UniquePid::ThisProcess() = _pInfo.upid();
UniquePid::ParentProcess() = _pInfo.uppid();
Util::initializeLogFile(_pInfo.procname());
if (createIndependentRootProcesses) {
DmtcpUniqueProcessId compId = _pInfo.compGroup().upid();
CoordinatorInfo coordInfo;
struct in_addr localIPAddr;
if (_pInfo.noCoordinator()) {
allowedModes = COORD_NONE;
}
// dmtcp_restart sets ENV_VAR_NAME_HOST/PORT, even if cmd line flag used
const char *host = NULL;
int port = UNINITIALIZED_PORT;
CoordinatorAPI::getCoordHostAndPort(allowedModes, &host, &port);
// FIXME: We will use the new HOST and PORT here, but after restart,,
// we will use the old HOST and PORT from the ckpt image.
CoordinatorAPI::instance().connectToCoordOnRestart(allowedModes,
_pInfo.procname(),
_pInfo.compGroup(),
_pInfo.numPeers(),
&coordInfo,
host,
port,
&localIPAddr);
// If port was 0, we'll get new random port when coordinator starts up.
CoordinatorAPI::getCoordHostAndPort(allowedModes, &host, &port);
Util::writeCoordPortToFile(port, thePortFile.c_str());
string installDir =
jalib::Filesystem::DirName(jalib::Filesystem::GetProgramDir());
#if defined(__i386__) || defined(__arm__)
if (Util::strEndsWith(installDir, "/lib/dmtcp/32")) {
// If dmtcp_launch was compiled for 32 bits in 64-bit O/S, then note:
// DMTCP_ROOT/bin/dmtcp_launch is a symbolic link to:
// DMTCP_ROOT/bin/dmtcp_launch/lib/dmtcp/32/bin
// GetProgramDir() followed the link. So, need to remove the suffix.
char *str = const_cast<char*>(installDir.c_str());
str[strlen(str) - strlen("/lib/dmtcp/32")] = '\0';
installDir = str;
}
#endif
/* We need to initialize SharedData here to make sure that it is
* initialized with the correct coordinator timestamp. The coordinator
* timestamp is updated only during postCkpt callback. However, the
* SharedData area may be initialized earlier (for example, while
* recreating threads), causing it to use *older* timestamp.
*/
SharedData::initialize(tmpDir.c_str(),
installDir.c_str(),
&compId,
&coordInfo,
&localIPAddr);
Util::prepareDlsymWrapper();
}
JTRACE("Creating process during restart") (upid()) (_pInfo.procname());
RestoreTargetMap::iterator it;
for (it = targets.begin(); it != targets.end(); it++) {
RestoreTarget *t = it->second;
if (_pInfo.upid() == t->_pInfo.upid()) {
continue;
} else if (_pInfo.isChild(t->upid()) &&
t->_pInfo.sid() != _pInfo.pid()) {
t->createDependentChildProcess();
}
}
if (createIndependentRootProcesses) {
RestoreTargetMap::iterator it;
for (it = independentProcessTreeRoots.begin();
it != independentProcessTreeRoots.end();
it++) {
RestoreTarget *t = it->second;
if (t != this) {
t->createDependentNonChildProcess();
}
}
}
// If we were the session leader, become one now.
if (_pInfo.sid() == _pInfo.pid()) {
if (getsid(0) != _pInfo.pid()) {
JWARNING(setsid() != -1) (getsid(0)) (JASSERT_ERRNO)
.Text("Failed to restore this process as session leader.");
}
}
// Now recreate processes with sid == _pid
for (it = targets.begin(); it != targets.end(); it++) {
RestoreTarget *t = it->second;
if (_pInfo.upid() == t->_pInfo.upid()) {
continue;
} else if (t->_pInfo.sid() == _pInfo.pid()) {
if (_pInfo.isChild(t->upid())) {
t->createDependentChildProcess();
} else if (t->isRootOfProcessTree()) {
t->createDependentNonChildProcess();
}
}
}
// Now close all open fds except _fd;
for (it = targets.begin(); it != targets.end(); it++) {
RestoreTarget *t = it->second;
if (t != this) {
close(t->fd());
}
}
string ckptDir = jalib::Filesystem::GetDeviceName(PROTECTED_CKPT_DIR_FD);
if (ckptDir.length() == 0) {
// Create the ckpt-dir fd so that the restarted process can know about
// the abs-path of ckpt-image.
string dirName = jalib::Filesystem::DirName(_path);
int dirfd = open(dirName.c_str(), O_RDONLY);
JASSERT(dirfd != -1) (JASSERT_ERRNO);
if (dirfd != PROTECTED_CKPT_DIR_FD) {
JASSERT(dup2(dirfd, PROTECTED_CKPT_DIR_FD) == PROTECTED_CKPT_DIR_FD);
close(dirfd);
}
}
if (!createIndependentRootProcesses) {
// dmtcp_restart sets ENV_VAR_NAME_HOST/PORT, even if cmd line flag used
const char *host = NULL;
int port = UNINITIALIZED_PORT;
int *port_p = &port;
CoordinatorAPI::getCoordHostAndPort(allowedModes, &host, port_p);
CoordinatorAPI::instance().connectToCoordOnRestart(allowedModes,
_pInfo.procname(),
_pInfo.compGroup(),
_pInfo.numPeers(),
NULL,
host,
port,
NULL);
}
setEnvironFd();
int is32bitElf = 0;
#if defined(__x86_64__) || defined(__aarch64__)
is32bitElf = (_pInfo.elfType() == ProcessInfo::Elf_32);
#elif defined(__i386__) || defined(__arm__)
is32bitElf = true;
#endif
runMtcpRestart(is32bitElf, _fd, &_pInfo);
JASSERT ( false ).Text ( "unreachable" );
}
