1Specify tracing options. 2 3@table @option 4@item [enable=]@var{pattern} 5Immediately enable events matching @var{pattern}. 6The file must contain one event name (as listed in the @file{trace-events-all} 7file) per line; globbing patterns are accepted too. This option is only 8available if QEMU has been compiled with the @var{simple}, @var{stderr} 9or @var{ftrace} tracing backend. To specify multiple events or patterns, 10specify the @option{-trace} option multiple times. 11 12Use @code{-trace help} to print a list of names of trace points. 13 14@item events=@var{file} 15Immediately enable events listed in @var{file}. 16The file must contain one event name (as listed in the @file{trace-events-all} 17file) per line; globbing patterns are accepted too. This option is only 18available if QEMU has been compiled with the @var{simple}, @var{stderr} or 19@var{ftrace} tracing backend. 20 21@item file=@var{file} 22Log output traces to @var{file}. 23This option is only available if QEMU has been compiled with 24the @var{simple} tracing backend. 25@end table 26