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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"
)
// DiagnoseFreeBSD sends the debug commands to the given writer which
// is expected to be connected to a panicked FreeBSD kernel. If kernel
// just hanged, we've lost connection or detected some non-panic error,
// console still shows normal login prompt.
func DiagnoseFreeBSD(w io.Writer) ([]byte, bool) {
commands := []string{
"",
"set $lines = 0", // disable pagination
"set $maxwidth = 0", // disable line continuation
"show registers",
"show proc",
"ps",
"show all locks",
"show malloc",
"show uma",
"show all tcpcbs/l",
}
for _, c := range commands {
w.Write([]byte(c + "\n"))
time.Sleep(1 * time.Second)
}
return nil, true
}
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