// Gator data flow: collector -> collector fifo -> sender
int main(int argc, char** argv) {
// Ensure proper signal handling by making gatord the process group leader
// e.g. it may not be the group leader when launched as 'sudo gatord'
setsid();
// Set up global thread-safe logging
logg = new Logging(hasDebugFlag(argc, argv));
// Global data class
gSessionData = new SessionData();
// Set up global utility class
util = new OlyUtility();
// Initialize drivers
new CCNDriver();
prctl(PR_SET_NAME, (unsigned long)&"gatord-main", 0, 0, 0);
pthread_mutex_init(&numSessions_mutex, NULL);
signal(SIGINT, handler);
signal(SIGTERM, handler);
signal(SIGABRT, handler);
// Set to high priority
if (setpriority(PRIO_PROCESS, syscall(__NR_gettid), -19) == -1) {
logg->logMessage("setpriority() failed");
}
// Parse the command line parameters
struct cmdline_t cmdline = parseCommandLine(argc, argv);
if (cmdline.update) {
return update(argv[0]);
}
// Verify root permissions
uid_t euid = geteuid();
if (euid) {
logg->logError(__FILE__, __LINE__, "gatord must be launched with root privileges");
handleException();
}
// Call before setting up the SIGCHLD handler, as system() spawns child processes
if (!setupFilesystem(cmdline.module)) {
logg->logMessage("Unable to setup gatorfs, trying perf");
if (!gSessionData->perf.setup()) {
logg->logError(__FILE__, __LINE__,
"Unable to locate gator.ko driver:\n"
" >>> gator.ko should be co-located with gatord in the same directory\n"
" >>> OR insmod gator.ko prior to launching gatord\n"
" >>> OR specify the location of gator.ko on the command line\n"
" >>> OR run Linux 3.4 or later with perf (CONFIG_PERF_EVENTS and CONFIG_HW_PERF_EVENTS) and tracing (CONFIG_TRACING and CONFIG_CONTEXT_SWITCH_TRACER) support to collect data via userspace only");
handleException();
}
}
{
EventsXML eventsXML;
mxml_node_t *xml = eventsXML.getTree();
// Initialize all drivers
for (Driver *driver = Driver::getHead(); driver != NULL; driver = driver->getNext()) {
driver->readEvents(xml);
}
mxmlDelete(xml);
}
// Handle child exit codes
signal(SIGCHLD, child_exit);
// Ignore the SIGPIPE signal so that any send to a broken socket will return an error code instead of asserting a signal
// Handling the error at the send function call is much easier than trying to do anything intelligent in the sig handler
signal(SIGPIPE, SIG_IGN);
// If the command line argument is a session xml file, no need to open a socket
if (gSessionData->mSessionXMLPath) {
child = new Child();
child->run();
delete child;
} else {
gSessionData->annotateListener.setup();
sock = new OlyServerSocket(cmdline.port);
udpListener.setup(cmdline.port);
if (!monitor.init() ||
!monitor.add(sock->getFd()) ||
!monitor.add(udpListener.getReq()) ||
!monitor.add(gSessionData->annotateListener.getFd()) ||
false) {
logg->logError(__FILE__, __LINE__, "Monitor setup failed");
handleException();
}
// Forever loop, can be exited via a signal or exception
while (1) {
struct epoll_event events[2];
logg->logMessage("Waiting on connection...");
int ready = monitor.wait(events, ARRAY_LENGTH(events), -1);
if (ready < 0) {
logg->logError(__FILE__, __LINE__, "Monitor::wait failed");
handleException();
}
for (int i = 0; i < ready; ++i) {
if (events[i].data.fd == sock->getFd()) {
handleClient();
} else if (events[i].data.fd == udpListener.getReq()) {
udpListener.handle();
} else if (events[i].data.fd == gSessionData->annotateListener.getFd()) {
gSessionData->annotateListener.handle();
}
}
}
}
cleanUp();
return 0;
}
// Gator data flow: collector -> collector fifo -> sender
int main(int argc, char** argv) {
// Ensure proper signal handling by making gatord the process group leader
// e.g. it may not be the group leader when launched as 'sudo gatord'
setsid();
// Set up global thread-safe logging
logg.setDebug(hasDebugFlag(argc, argv));
gSessionData.initialize();
prctl(PR_SET_NAME, (unsigned long)&"gatord-main", 0, 0, 0);
pthread_mutex_init(&numSessions_mutex, NULL);
signal(SIGINT, handler);
signal(SIGTERM, handler);
signal(SIGABRT, handler);
// Set to high priority
if (setpriority(PRIO_PROCESS, syscall(__NR_gettid), -19) == -1) {
logg.logMessage("setpriority() failed");
}
// Try to increase the maximum number of file descriptors
{
struct rlimit rlim;
memset(&rlim, 0, sizeof(rlim));
if (getrlimit(RLIMIT_NOFILE, &rlim) != 0) {
logg.logMessage("Unable to get the maximum number of files");
// Not good, but not a fatal error either
} else {
rlim.rlim_cur = max(((rlim_t)1)<<15, rlim.rlim_cur);
rlim.rlim_max = max(rlim.rlim_cur, rlim.rlim_max);
if (setrlimit(RLIMIT_NOFILE, &rlim) != 0) {
logg.logMessage("Unable to increase the maximum number of files");
// Not good, but not a fatal error either
}
}
}
// Parse the command line parameters
struct cmdline_t cmdline = parseCommandLine(argc, argv);
// Verify root permissions
uid_t euid = geteuid();
if (euid) {
logg.logError("gatord must be launched with root privileges");
handleException();
}
PmuXML::read(cmdline.pmuPath);
// Call before setting up the SIGCHLD handler, as system() spawns child processes
if (setupFilesystem(cmdline.module)) {
DriverSource::checkVersion();
PmuXML::writeToKernel();
} else {
logg.logMessage("Unable to set up gatorfs, trying perf");
if (!gSessionData.mPerf.setup()) {
logg.logError(
"Unable to locate gator.ko driver:\n"
" >>> gator.ko should be co-located with gatord in the same directory\n"
" >>> OR insmod gator.ko prior to launching gatord\n"
" >>> OR specify the location of gator.ko on the command line\n"
" >>> OR run Linux 3.4 or later with perf (CONFIG_PERF_EVENTS and CONFIG_HW_PERF_EVENTS) and tracing (CONFIG_TRACING and CONFIG_CONTEXT_SWITCH_TRACER) support to collect data via userspace only");
handleException();
}
}
{
EventsXML eventsXML;
mxml_node_t *xml = eventsXML.getTree();
// Initialize all drivers
for (Driver *driver = Driver::getHead(); driver != NULL; driver = driver->getNext()) {
driver->readEvents(xml);
}
mxmlDelete(xml);
}
// Handle child exit codes
signal(SIGCHLD, child_exit);
// Ignore the SIGPIPE signal so that any send to a broken socket will return an error code instead of asserting a signal
// Handling the error at the send function call is much easier than trying to do anything intelligent in the sig handler
signal(SIGPIPE, SIG_IGN);
// If the command line argument is a session xml file, no need to open a socket
if (gSessionData.mSessionXMLPath) {
child = new Child();
child->run();
delete child;
} else {
annotateListener.setup();
int pipefd[2];
if (pipe_cloexec(pipefd) != 0) {
logg.logError("Unable to set up annotate pipe");
handleException();
}
gSessionData.mAnnotateStart = pipefd[1];
sock = new OlyServerSocket(cmdline.port);
udpListener.setup(cmdline.port);
if (!monitor.init() ||
!monitor.add(sock->getFd()) ||
!monitor.add(udpListener.getReq()) ||
!monitor.add(annotateListener.getSockFd()) ||
!monitor.add(annotateListener.getUdsFd()) ||
!monitor.add(pipefd[0]) ||
false) {
logg.logError("Monitor setup failed");
handleException();
}
// Forever loop, can be exited via a signal or exception
while (1) {
struct epoll_event events[2];
logg.logMessage("Waiting on connection...");
int ready = monitor.wait(events, ARRAY_LENGTH(events), -1);
if (ready < 0) {
logg.logError("Monitor::wait failed");
handleException();
}
for (int i = 0; i < ready; ++i) {
if (events[i].data.fd == sock->getFd()) {
handleClient();
} else if (events[i].data.fd == udpListener.getReq()) {
udpListener.handle();
} else if (events[i].data.fd == annotateListener.getSockFd()) {
annotateListener.handleSock();
} else if (events[i].data.fd == annotateListener.getUdsFd()) {
annotateListener.handleUds();
} else if (events[i].data.fd == pipefd[0]) {
uint64_t val;
if (read(pipefd[0], &val, sizeof(val)) != sizeof(val)) {
logg.logMessage("Reading annotate pipe failed");
}
annotateListener.signal();
}
}
}
}
cleanUp();
return 0;
}
