func setupDumpStackTrap(root string) {
// Windows does not support signals like *nix systems. So instead of
// trapping on SIGUSR1 to dump stacks, we wait on a Win32 event to be
// signaled. ACL'd to builtin administrators and local system
ev := "Global\\docker-daemon-" + fmt.Sprint(os.Getpid())
sd, err := winio.SddlToSecurityDescriptor("D:P(A;;GA;;;BA)(A;;GA;;;SY)")
if err != nil {
logrus.Errorf("failed to get security descriptor for debug stackdump event %s: %s", ev, err.Error())
return
}
var sa syscall.SecurityAttributes
sa.Length = uint32(unsafe.Sizeof(sa))
sa.InheritHandle = 1
sa.SecurityDescriptor = uintptr(unsafe.Pointer(&sd[0]))
h, err := system.CreateEvent(&sa, false, false, ev)
if h == 0 || err != nil {
logrus.Errorf("failed to create debug stackdump event %s: %s", ev, err.Error())
return
}
go func() {
logrus.Debugf("Stackdump - waiting signal at %s", ev)
for {
syscall.WaitForSingleObject(h, syscall.INFINITE)
signal.DumpStacks(root)
}
}()
}
// setupConfigReloadTrap configures a Win32 event to reload the configuration.
func (cli *DaemonCli) setupConfigReloadTrap() {
go func() {
sa := syscall.SecurityAttributes{
Length: 0,
}
ev := "Global\\docker-daemon-config-" + fmt.Sprint(os.Getpid())
if h, _ := system.CreateEvent(&sa, false, false, ev); h != 0 {
logrus.Debugf("Config reload - waiting signal at %s", ev)
for {
syscall.WaitForSingleObject(h, syscall.INFINITE)
cli.reloadConfig()
}
}
}()
}
// setupConfigReloadTrap configures a Win32 event to reload the configuration.
func setupConfigReloadTrap(configFile string, flags *mflag.FlagSet, reload func(*daemon.Config)) {
go func() {
sa := syscall.SecurityAttributes{
Length: 0,
}
ev := "Global\\docker-daemon-config-" + fmt.Sprint(os.Getpid())
if h, _ := system.CreateEvent(&sa, false, false, ev); h != 0 {
logrus.Debugf("Config reload - waiting signal at %s", ev)
for {
syscall.WaitForSingleObject(h, syscall.INFINITE)
daemon.ReloadConfiguration(configFile, flags, reload)
}
}
}()
}
// Copied over from docker/daemon/debugtrap_windows.go
func setupDumpStackTrap() {
go func() {
sa := syscall.SecurityAttributes{
Length: 0,
}
ev := "Global\\docker-daemon-" + fmt.Sprint(os.Getpid())
if h, _ := system.CreateEvent(&sa, false, false, ev); h != 0 {
logrus.Debugf("Stackdump - waiting signal at %s", ev)
for {
syscall.WaitForSingleObject(h, syscall.INFINITE)
signal.DumpStacks()
}
}
}()
}
func setupDumpStackTrap() {
// Windows does not support signals like *nix systems. So instead of
// trapping on SIGUSR1 to dump stacks, we wait on a Win32 event to be
// signaled.
go func() {
sa := syscall.SecurityAttributes{
Length: 0,
}
ev := "Global\\docker-daemon-" + fmt.Sprint(os.Getpid())
if h, _ := system.CreateEvent(&sa, false, false, ev); h != 0 {
logrus.Debugf("Stackdump - waiting signal at %s", ev)
for {
syscall.WaitForSingleObject(h, syscall.INFINITE)
psignal.DumpStacks()
}
}
}()
}