1Specify tracing options. 2 3@table @option 4@item [enable=]@var{pattern} 5Immediately enable events matching @var{pattern} 6(either event name or a globbing pattern). This option is only 7available if QEMU has been compiled with the @var{simple}, @var{log} 8or @var{ftrace} tracing backend. To specify multiple events or patterns, 9specify the @option{-trace} option multiple times. 10 11Use @code{-trace help} to print a list of names of trace points. 12 13@item events=@var{file} 14Immediately enable events listed in @var{file}. 15The file must contain one event name (as listed in the @file{trace-events-all} 16file) per line; globbing patterns are accepted too. This option is only 17available if QEMU has been compiled with the @var{simple}, @var{log} or 18@var{ftrace} tracing backend. 19 20@item file=@var{file} 21Log output traces to @var{file}. 22This option is only available if QEMU has been compiled with 23the @var{simple} tracing backend. 24@end table 25