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-rw-r--r--runsc/cmd/debug.go44
1 files changed, 41 insertions, 3 deletions
diff --git a/runsc/cmd/debug.go b/runsc/cmd/debug.go
index e10326754..3ee9a9b49 100644
--- a/runsc/cmd/debug.go
+++ b/runsc/cmd/debug.go
@@ -16,7 +16,9 @@ package cmd
import (
"context"
+ "os"
"syscall"
+ "time"
"flag"
"github.com/google/subcommands"
@@ -27,9 +29,12 @@ import (
// Debug implements subcommands.Command for the "debug" command.
type Debug struct {
- pid int
- stacks bool
- signal int
+ pid int
+ stacks bool
+ signal int
+ profileHeap string
+ profileCPU string
+ profileDelay int
}
// Name implements subcommands.Command.
@@ -51,6 +56,9 @@ func (*Debug) Usage() string {
func (d *Debug) SetFlags(f *flag.FlagSet) {
f.IntVar(&d.pid, "pid", 0, "sandbox process ID. Container ID is not necessary if this is set")
f.BoolVar(&d.stacks, "stacks", false, "if true, dumps all sandbox stacks to the log")
+ f.StringVar(&d.profileHeap, "profile-heap", "", "writes heap profile to the given file.")
+ f.StringVar(&d.profileCPU, "profile-cpu", "", "writes CPU profile to the given file.")
+ f.IntVar(&d.profileDelay, "profile-delay", 5, "amount of time to wait before stoping CPU profile")
f.IntVar(&d.signal, "signal", -1, "sends signal to the sandbox")
}
@@ -114,5 +122,35 @@ func (d *Debug) Execute(_ context.Context, f *flag.FlagSet, args ...interface{})
}
log.Infof(" *** Stack dump ***\n%s", stacks)
}
+ if d.profileCPU != "" {
+ f, err := os.Create(d.profileCPU)
+ if err != nil {
+ Fatalf(err.Error())
+ }
+ defer f.Close()
+
+ if err := c.Sandbox.StartCPUProfile(f); err != nil {
+ Fatalf(err.Error())
+ }
+ log.Infof("CPU profile started for %d sec, writing to %q", d.profileDelay, d.profileCPU)
+ time.Sleep(time.Duration(d.profileDelay) * time.Second)
+
+ if err := c.Sandbox.StopCPUProfile(); err != nil {
+ Fatalf(err.Error())
+ }
+ log.Infof("CPU profile written to %q", d.profileCPU)
+ }
+ if d.profileHeap != "" {
+ f, err := os.Create(d.profileHeap)
+ if err != nil {
+ Fatalf(err.Error())
+ }
+ defer f.Close()
+
+ if err := c.Sandbox.HeapProfile(f); err != nil {
+ Fatalf(err.Error())
+ }
+ log.Infof("Heap profile written to %q", d.profileHeap)
+ }
return subcommands.ExitSuccess
}