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// Copyright 2018 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
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) ([]byte, bool) {
commands := []string{
"",
"set $lines = 0", // disable pagination
"set $maxwidth = 0", // disable line continuation
"show panic",
"trace",
"show registers",
"show proc",
"ps",
"show all locks",
"show malloc",
"show all pools",
"machine ddbcpu 0", // Traces a couple of first CPUs (enough on GCE farm).
"trace",
"machine ddbcpu 1", // One of these is likely a dup of the very first trace.
"trace",
}
for _, c := range commands {
w.Write([]byte(c + "\n"))
time.Sleep(1 * time.Second)
}
return nil, true
}
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