1bb43ee6cSPeter Maydell 2bb43ee6cSPeter MaydellSpecify tracing options. 3bb43ee6cSPeter Maydell 4*5a4b0d41SPeter Maydell``[enable=]PATTERN`` 5bb43ee6cSPeter Maydell 6bb43ee6cSPeter Maydell Immediately enable events matching *PATTERN* 7bb43ee6cSPeter Maydell (either event name or a globbing pattern). This option is only 8bb43ee6cSPeter Maydell available if QEMU has been compiled with the ``simple``, ``log`` 9bb43ee6cSPeter Maydell or ``ftrace`` tracing backend. To specify multiple events or patterns, 10bb43ee6cSPeter Maydell specify the :option:`-trace` option multiple times. 11bb43ee6cSPeter Maydell 12bb43ee6cSPeter Maydell Use :option:`-trace help` to print a list of names of trace points. 13bb43ee6cSPeter Maydell 14*5a4b0d41SPeter Maydell``events=FILE`` 15bb43ee6cSPeter Maydell 16bb43ee6cSPeter Maydell Immediately enable events listed in *FILE*. 17bb43ee6cSPeter Maydell The file must contain one event name (as listed in the ``trace-events-all`` 18bb43ee6cSPeter Maydell file) per line; globbing patterns are accepted too. This option is only 19bb43ee6cSPeter Maydell available if QEMU has been compiled with the ``simple``, ``log`` or 20bb43ee6cSPeter Maydell ``ftrace`` tracing backend. 21bb43ee6cSPeter Maydell 22*5a4b0d41SPeter Maydell``file=FILE`` 23bb43ee6cSPeter Maydell 24bb43ee6cSPeter Maydell Log output traces to *FILE*. 25bb43ee6cSPeter Maydell This option is only available if QEMU has been compiled with 26bb43ee6cSPeter Maydell the ``simple`` tracing backend. 27