@@ -231,7 +231,7 @@ func (daemon *Daemon) register(container *Container, updateSuffixarray bool) err

 		log.Debugf("killing old running container %s", container.ID)

 		existingPid := container.Pid

-		container.SetStopped(0)

+		container.SetStopped(&execdriver.ExitStatus{0, false})

 		// We only have to handle this for lxc because the other drivers will ensure that

 		// no processes are left when docker dies

@@ -263,7 +263,7 @@ func (daemon *Daemon) register(container *Container, updateSuffixarray bool) err

 			log.Debugf("Marking as stopped")

-			container.SetStopped(-127)

+			container.SetStopped(&execdriver.ExitStatus{-127, false})

 			if err := container.ToDisk(); err != nil {

 				return err

 			}

@@ -991,7 +991,7 @@ func (daemon *Daemon) Diff(container *Container) (archive.Archive, error) {

 	return daemon.driver.Diff(container.ID, initID)

 }

-func (daemon *Daemon) Run(c *Container, pipes *execdriver.Pipes, startCallback execdriver.StartCallback) (int, error) {

+func (daemon *Daemon) Run(c *Container, pipes *execdriver.Pipes, startCallback execdriver.StartCallback) (execdriver.ExitStatus, error) {

 	return daemon.execDriver.Run(c.command, pipes, startCallback)

 }

@@ -40,9 +40,18 @@ type TtyTerminal interface {

 	Master() *os.File

 }

+// ExitStatus provides exit reasons for a container.

+type ExitStatus struct {

+	// The exit code with which the container exited.

+	ExitCode int

+

+	// Whether the container encountered an OOM.

+	OOMKilled bool

+}

+

 type Driver interface {

-	Run(c *Command, pipes *Pipes, startCallback StartCallback) (int, error) // Run executes the process and blocks until the process exits and returns the exit code

-	// Exec executes the process in a running container, blocks until the process exits and returns the exit code

+	Run(c *Command, pipes *Pipes, startCallback StartCallback) (ExitStatus, error) // Run executes the process and blocks until the process exits and returns the exit code

+	// Exec executes the process in an existing container, blocks until the process exits and returns the exit code

 	Exec(c *Command, processConfig *ProcessConfig, pipes *Pipes, startCallback StartCallback) (int, error)

 	Kill(c *Command, sig int) error

 	Pause(c *Command) error

@@ -55,7 +55,7 @@ func (d *driver) Name() string {

 	return fmt.Sprintf("%s-%s", DriverName, version)

 }

-func (d *driver) Run(c *execdriver.Command, pipes *execdriver.Pipes, startCallback execdriver.StartCallback) (int, error) {

+func (d *driver) Run(c *execdriver.Command, pipes *execdriver.Pipes, startCallback execdriver.StartCallback) (execdriver.ExitStatus, error) {

 	var (

 		term execdriver.Terminal

 		err  error

@@ -76,11 +76,11 @@ func (d *driver) Run(c *execdriver.Command, pipes *execdriver.Pipes, startCallba

 	})

 	if err := d.generateEnvConfig(c); err != nil {

-		return -1, err

+		return execdriver.ExitStatus{-1, false}, err

 	}

 	configPath, err := d.generateLXCConfig(c)

 	if err != nil {

-		return -1, err

+		return execdriver.ExitStatus{-1, false}, err

 	}

 	params := []string{

 		"lxc-start",

@@ -155,11 +155,11 @@ func (d *driver) Run(c *execdriver.Command, pipes *execdriver.Pipes, startCallba

 	c.ProcessConfig.Args = append([]string{name}, arg...)

 	if err := nodes.CreateDeviceNodes(c.Rootfs, c.AutoCreatedDevices); err != nil {

-		return -1, err

+		return execdriver.ExitStatus{-1, false}, err

 	}

 	if err := c.ProcessConfig.Start(); err != nil {

-		return -1, err

+		return execdriver.ExitStatus{-1, false}, err

 	}

 	var (

@@ -183,7 +183,7 @@ func (d *driver) Run(c *execdriver.Command, pipes *execdriver.Pipes, startCallba

 			c.ProcessConfig.Process.Kill()

 			c.ProcessConfig.Wait()

 		}

-		return -1, err

+		return execdriver.ExitStatus{-1, false}, err

 	}

 	c.ContainerPid = pid

@@ -194,7 +194,7 @@ func (d *driver) Run(c *execdriver.Command, pipes *execdriver.Pipes, startCallba

 	<-waitLock

-	return getExitCode(c), waitErr

+	return execdriver.ExitStatus{getExitCode(c), false}, waitErr

 }

 /// Return the exit code of the process

@@ -14,6 +14,7 @@ import (

 	"sync"

 	"syscall"

+	log "github.com/Sirupsen/logrus"

 	"github.com/docker/docker/daemon/execdriver"

 	"github.com/docker/docker/pkg/term"

 	"github.com/docker/libcontainer"

@@ -60,11 +61,20 @@ func NewDriver(root, initPath string) (*driver, error) {

 	}, nil

 }

-func (d *driver) Run(c *execdriver.Command, pipes *execdriver.Pipes, startCallback execdriver.StartCallback) (int, error) {

+func (d *driver) notifyOnOOM(config *libcontainer.Config) (<-chan struct{}, error) {

+	return fs.NotifyOnOOM(config.Cgroups)

+}

+

+type execOutput struct {

+	exitCode int

+	err      error

+}

+

+func (d *driver) Run(c *execdriver.Command, pipes *execdriver.Pipes, startCallback execdriver.StartCallback) (execdriver.ExitStatus, error) {

 	// take the Command and populate the libcontainer.Config from it

 	container, err := d.createContainer(c)

 	if err != nil {

-		return -1, err

+		return execdriver.ExitStatus{-1, false}, err

 	}

 	var term execdriver.Terminal

@@ -75,7 +85,7 @@ func (d *driver) Run(c *execdriver.Command, pipes *execdriver.Pipes, startCallba

 		term, err = execdriver.NewStdConsole(&c.ProcessConfig, pipes)

 	}

 	if err != nil {

-		return -1, err

+		return execdriver.ExitStatus{-1, false}, err

 	}

 	c.ProcessConfig.Terminal = term

@@ -92,40 +102,66 @@ func (d *driver) Run(c *execdriver.Command, pipes *execdriver.Pipes, startCallba

 	)

 	if err := d.createContainerRoot(c.ID); err != nil {

-		return -1, err

+		return execdriver.ExitStatus{-1, false}, err

 	}

 	defer d.cleanContainer(c.ID)

 	if err := d.writeContainerFile(container, c.ID); err != nil {

-		return -1, err

+		return execdriver.ExitStatus{-1, false}, err

 	}

-	return namespaces.Exec(container, c.ProcessConfig.Stdin, c.ProcessConfig.Stdout, c.ProcessConfig.Stderr, c.ProcessConfig.Console, dataPath, args, func(container *libcontainer.Config, console, dataPath, init string, child *os.File, args []string) *exec.Cmd {

-		c.ProcessConfig.Path = d.initPath

-		c.ProcessConfig.Args = append([]string{

-			DriverName,

-			"-console", console,

-			"-pipe", "3",

-			"-root", filepath.Join(d.root, c.ID),

-			"--",

-		}, args...)

-

-		// set this to nil so that when we set the clone flags anything else is reset

-		c.ProcessConfig.SysProcAttr = &syscall.SysProcAttr{

-			Cloneflags: uintptr(namespaces.GetNamespaceFlags(container.Namespaces)),

-		}

-		c.ProcessConfig.ExtraFiles = []*os.File{child}

+	execOutputChan := make(chan execOutput, 1)

+	waitForStart := make(chan struct{})

-		c.ProcessConfig.Env = container.Env

-		c.ProcessConfig.Dir = container.RootFs

+	go func() {

+		exitCode, err := namespaces.Exec(container, c.ProcessConfig.Stdin, c.ProcessConfig.Stdout, c.ProcessConfig.Stderr, c.ProcessConfig.Console, dataPath, args, func(container *libcontainer.Config, console, dataPath, init string, child *os.File, args []string) *exec.Cmd {

+			c.ProcessConfig.Path = d.initPath

+			c.ProcessConfig.Args = append([]string{

+				DriverName,

+				"-console", console,

+				"-pipe", "3",

+				"-root", filepath.Join(d.root, c.ID),

+				"--",

+			}, args...)

+

+			// set this to nil so that when we set the clone flags anything else is reset

+			c.ProcessConfig.SysProcAttr = &syscall.SysProcAttr{

+				Cloneflags: uintptr(namespaces.GetNamespaceFlags(container.Namespaces)),

+			}

+			c.ProcessConfig.ExtraFiles = []*os.File{child}

-		return &c.ProcessConfig.Cmd

-	}, func() {

-		if startCallback != nil {

-			c.ContainerPid = c.ProcessConfig.Process.Pid

-			startCallback(&c.ProcessConfig, c.ContainerPid)

-		}

-	})

+			c.ProcessConfig.Env = container.Env

+			c.ProcessConfig.Dir = container.RootFs

+

+			return &c.ProcessConfig.Cmd

+		}, func() {

+			close(waitForStart)

+			if startCallback != nil {

+				c.ContainerPid = c.ProcessConfig.Process.Pid

+				startCallback(&c.ProcessConfig, c.ContainerPid)

+			}

+		})

+		execOutputChan <- execOutput{exitCode, err}

+	}()

+

+	select {

+	case execOutput := <-execOutputChan:

+		return execdriver.ExitStatus{execOutput.exitCode, false}, execOutput.err

+	case <-waitForStart:

+		break

+	}

+

+	oomKill := false

+	oomKillNotification, err := d.notifyOnOOM(container)

+	if err == nil {

+		_, oomKill = <-oomKillNotification

+	} else {

+		log.Warnf("WARNING: Your kernel does not support OOM notifications: %s", err)

+	}

+	// wait for the container to exit.

+	execOutput := <-execOutputChan

+

+	return execdriver.ExitStatus{execOutput.exitCode, oomKill}, execOutput.err

 }

 func (d *driver) Kill(p *execdriver.Command, sig int) error {

@@ -100,7 +100,7 @@ func (m *containerMonitor) Close() error {

 func (m *containerMonitor) Start() error {

 	var (

 		err        error

-		exitStatus int

+		exitStatus execdriver.ExitStatus

 		// this variable indicates where we in execution flow:

 		// before Run or after

 		afterRun bool

@@ -110,7 +110,7 @@ func (m *containerMonitor) Start() error {

 	defer func() {

 		if afterRun {

 			m.container.Lock()

-			m.container.setStopped(exitStatus)

+			m.container.setStopped(&exitStatus)

 			defer m.container.Unlock()

 		}

 		m.Close()

@@ -138,7 +138,7 @@ func (m *containerMonitor) Start() error {

 			// if we receive an internal error from the initial start of a container then lets

 			// return it instead of entering the restart loop

 			if m.container.RestartCount == 0 {

-				m.container.ExitCode = exitStatus

+				m.container.ExitCode = -1

 				m.resetContainer(false)

 				return err

@@ -150,10 +150,10 @@ func (m *containerMonitor) Start() error {

 		// here container.Lock is already lost

 		afterRun = true

-		m.resetMonitor(err == nil && exitStatus == 0)

+		m.resetMonitor(err == nil && exitStatus.ExitCode == 0)

-		if m.shouldRestart(exitStatus) {

-			m.container.SetRestarting(exitStatus)

+		if m.shouldRestart(exitStatus.ExitCode) {

+			m.container.SetRestarting(&exitStatus)

 			m.container.LogEvent("die")

 			m.resetContainer(true)

@@ -164,12 +164,12 @@ func (m *containerMonitor) Start() error {

 			// we need to check this before reentering the loop because the waitForNextRestart could have

 			// been terminated by a request from a user

 			if m.shouldStop {

-				m.container.ExitCode = exitStatus

+				m.container.ExitCode = exitStatus.ExitCode

 				return err

 			}

 			continue

 		}

-		m.container.ExitCode = exitStatus

+		m.container.ExitCode = exitStatus.ExitCode

 		m.container.LogEvent("die")

 		m.resetContainer(true)

 		return err

@@ -209,7 +209,7 @@ func (m *containerMonitor) waitForNextRestart() {

 // shouldRestart checks the restart policy and applies the rules to determine if

 // the container's process should be restarted

-func (m *containerMonitor) shouldRestart(exitStatus int) bool {

+func (m *containerMonitor) shouldRestart(exitCode int) bool {

 	m.mux.Lock()

 	defer m.mux.Unlock()

@@ -228,7 +228,7 @@ func (m *containerMonitor) shouldRestart(exitStatus int) bool {

 			return false

 		}

-		return exitStatus != 0

+		return exitCode != 0

 	}

 	return false

@@ -5,6 +5,7 @@ import (

 	"sync"

 	"time"

+	"github.com/docker/docker/daemon/execdriver"

 	"github.com/docker/docker/pkg/units"

 )

@@ -13,6 +14,7 @@ type State struct {

 	Running    bool

 	Paused     bool

 	Restarting bool

+	OOMKilled  bool

 	Pid        int

 	ExitCode   int

 	Error      string // contains last known error when starting the container

@@ -149,25 +151,26 @@ func (s *State) setRunning(pid int) {

 	s.waitChan = make(chan struct{})

 }

-func (s *State) SetStopped(exitCode int) {

+func (s *State) SetStopped(exitStatus *execdriver.ExitStatus) {

 	s.Lock()

-	s.setStopped(exitCode)

+	s.setStopped(exitStatus)

 	s.Unlock()

 }

-func (s *State) setStopped(exitCode int) {

+func (s *State) setStopped(exitStatus *execdriver.ExitStatus) {

 	s.Running = false

 	s.Restarting = false

 	s.Pid = 0

 	s.FinishedAt = time.Now().UTC()

-	s.ExitCode = exitCode

+	s.ExitCode = exitStatus.ExitCode

+	s.OOMKilled = exitStatus.OOMKilled

 	close(s.waitChan) // fire waiters for stop

 	s.waitChan = make(chan struct{})

 }

 // SetRestarting is when docker hanldes the auto restart of containers when they are

 // in the middle of a stop and being restarted again

-func (s *State) SetRestarting(exitCode int) {

+func (s *State) SetRestarting(exitStatus *execdriver.ExitStatus) {

 	s.Lock()

 	// we should consider the container running when it is restarting because of

 	// all the checks in docker around rm/stop/etc

@@ -175,7 +178,8 @@ func (s *State) SetRestarting(exitCode int) {

 	s.Restarting = true

 	s.Pid = 0

 	s.FinishedAt = time.Now().UTC()

-	s.ExitCode = exitCode

+	s.ExitCode = exitStatus.ExitCode

+	s.OOMKilled = exitStatus.OOMKilled

 	close(s.waitChan) // fire waiters for stop

 	s.waitChan = make(chan struct{})

 	s.Unlock()

@@ -4,6 +4,8 @@ import (

 	"sync/atomic"

 	"testing"

 	"time"

+

+	"github.com/docker/docker/daemon/execdriver"

 )

 func TestStateRunStop(t *testing.T) {

@@ -47,7 +49,7 @@ func TestStateRunStop(t *testing.T) {

 			atomic.StoreInt64(&exit, int64(exitCode))

 			close(stopped)

 		}()

-		s.SetStopped(i)

+		s.SetStopped(&execdriver.ExitStatus{i, false})

 		if s.IsRunning() {

 			t.Fatal("State is running")

 		}

@@ -18,6 +18,7 @@ import (

 	log "github.com/Sirupsen/logrus"

 	"github.com/docker/docker/daemon"

+	"github.com/docker/docker/daemon/execdriver"

 	"github.com/docker/docker/engine"

 	"github.com/docker/docker/image"

 	"github.com/docker/docker/nat"

@@ -652,7 +653,7 @@ func TestRestore(t *testing.T) {

 	if err := container3.Run(); err != nil {

 		t.Fatal(err)

 	}

-	container2.SetStopped(0)

+	container2.SetStopped(&execdriver.ExitStatus{0, false})

 }

 func TestDefaultContainerName(t *testing.T) {