vm/gce: use openbsd console diagnostic code for both vmm and gce

* openbsd: use console diagnostic code for both vmm and gce.

* gometalinter wants less indentation and more stuff in scope

* Comment no longer applies

1 files changed, 27 insertions, 0 deletions

diff --git a/vm/vmimpl/openbsd.go b/vm/vmimpl/openbsd.go
new file mode 100644
index 000000000..79132ebf8
--- /dev/null
+++ b/vm/vmimpl/openbsd.go
@@ -0,0 +1,27 @@
+package vmimpl
+
+import (
+	"io"
+	"time"
+)
+
+// DiagnoseOpenBSD sends the debug commands to the given writer which
+// is expected to be connected to a paniced openbsd kernel.  If kernel
+// just hanged, we've lost connection or detected some non-panic
+// error, console still shows normal login prompt.
+func DiagnoseOpenBSD(w io.Writer) bool {
+	commands := []string{
+		"",
+		"set $lines = 0", // disable pagination
+		"show panic",
+		"trace",
+		"show registers",
+		"show proc",
+		"ps",
+	}
+	for _, c := range commands {
+		w.Write([]byte(c + "\n"))
+		time.Sleep(1 * time.Second)
+	}
+	return true
+}