Re: [Qemu-devel] [PATCH v2 1/2] trace: [linux-user] Commandline arguments to control tracing

[Lluís Vilanova]

Stefan Hajnoczi writes:

> On Wed, Jun 22, 2016 at 12:04:35PM +0200, Lluís Vilanova wrote:
>> @@ -4047,6 +4064,12 @@ static const struct qemu_argument arg_table[] = {
>> "",           "log system calls"},
>> {"seed",       "QEMU_RAND_SEED",   true,  handle_arg_randseed,
>> "",           "Seed for pseudo-random number generator"},
>> +    {"trace-enable", "QEMU_TRACE_ENABLE",true,  handle_arg_trace_enable,
>> +     "name",       "enable tracing of specified event names (pass 'help' to 
>> show a list of events)"},
>> +    {"trace-events", "QEMU_TRACE_EVENTS",true,  handle_arg_trace_events,
>> +     "eventsfile", "enable tracing of specified event names (one 
>> name/pattern per line)"},
>> +    {"trace-file", "QEMU_TRACE_FILE",  true,  handle_arg_trace_file,
>> +     "tracefile",  "output trace file"},

> Riku: These command-line options differ from the qemu-system -trace
> option.  Should there be consistency or does *-user do its own thing?

Do you mean it differs on semantics or on syntax? For the latter, *-user option
parsers do not use the more flexible parser used in vl.c (each has their own
much simpler implementation).

Cheers,
  Lluis