Add runtime tracing.

This adds meaningful annotations to the trace generated by the runtime/trace
package.

PiperOrigin-RevId: 284290115

1 files changed, 14 insertions, 15 deletions

diff --git a/runsc/cmd/debug.go b/runsc/cmd/debug.go
index 7313e473f..38da7ee02 100644
--- a/runsc/cmd/debug.go
+++ b/runsc/cmd/debug.go
@@ -32,16 +32,16 @@ import (
 
 // Debug implements subcommands.Command for the "debug" command.
 type Debug struct {
-	pid          int
-	stacks       bool
-	signal       int
-	profileHeap  string
-	profileCPU   string
-	profileDelay int
-	trace        string
-	strace       string
-	logLevel     string
-	logPackets   string
+	pid         int
+	stacks      bool
+	signal      int
+	profileHeap string
+	profileCPU  string
+	trace       string
+	strace      string
+	logLevel    string
+	logPackets  string
+	duration    time.Duration
 }
 
 // Name implements subcommands.Command.
@@ -65,7 +65,7 @@ func (d *Debug) SetFlags(f *flag.FlagSet) {
 	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.DurationVar(&d.duration, "duration", time.Second, "amount of time to wait for CPU and trace profiles")
 	f.StringVar(&d.trace, "trace", "", "writes an execution trace to the given file.")
 	f.IntVar(&d.signal, "signal", -1, "sends signal to the sandbox")
 	f.StringVar(&d.strace, "strace", "", `A comma separated list of syscalls to trace. "all" enables all traces, "off" disables all`)
@@ -163,7 +163,7 @@ func (d *Debug) Execute(_ context.Context, f *flag.FlagSet, args ...interface{})
 		if err := c.Sandbox.StartCPUProfile(f); err != nil {
 			return Errorf(err.Error())
 		}
-		log.Infof("CPU profile started for %d sec, writing to %q", d.profileDelay, d.profileCPU)
+		log.Infof("CPU profile started for %v, writing to %q", d.duration, d.profileCPU)
 	}
 	if d.trace != "" {
 		delay = true
@@ -181,8 +181,7 @@ func (d *Debug) Execute(_ context.Context, f *flag.FlagSet, args ...interface{})
 		if err := c.Sandbox.StartTrace(f); err != nil {
 			return Errorf(err.Error())
 		}
-		log.Infof("Tracing started for %d sec, writing to %q", d.profileDelay, d.trace)
-
+		log.Infof("Tracing started for %v, writing to %q", d.duration, d.trace)
 	}
 
 	if d.strace != "" || len(d.logLevel) != 0 || len(d.logPackets) != 0 {
@@ -243,7 +242,7 @@ func (d *Debug) Execute(_ context.Context, f *flag.FlagSet, args ...interface{})
 	}
 
 	if delay {
-		time.Sleep(time.Duration(d.profileDelay) * time.Second)
+		time.Sleep(d.duration)
 	}
 
 	return subcommands.ExitSuccess