On Thu, Aug 11, 2016 at 06:11:29PM +0200, Lluís Vilanova wrote:
> An explicit if/else is clearer than arithmetic assuming #true is 1,
> while the compiler should be able to generate just as optimal code.
>
> Signed-off-by: Lluís Vilanova <vilan...@ac.upc.edu>
> ---
> stubs/trace-control.c | 9 +++++++--
> trace/control-target.c | 18 ++++++++++++++----
> 2 files changed, 21 insertions(+), 6 deletions(-)
>
> diff --git a/stubs/trace-control.c b/stubs/trace-control.c
> index 3740c38..099c2b5 100644
> --- a/stubs/trace-control.c
> +++ b/stubs/trace-control.c
> @@ -21,8 +21,13 @@ void trace_event_set_state_dynamic(TraceEvent *ev, bool
> state)
> TraceEventID id;
> assert(trace_event_get_state_static(ev));
> id = trace_event_get_id(ev);
> - trace_events_enabled_count += state - trace_events_dstate[id];
> - trace_events_dstate[id] = state;
> + if (state) {
> + trace_events_enabled_count++;
> + trace_events_dstate[id] = 1;
> + } else {
> + trace_events_enabled_count--;
SHouldn't this be trace_events_enabled_count -= trace_events_dstate[id];
as it is possible to call this method for a trace event that is a per-vcpu
event
> + trace_events_dstate[id] = 0;
> + }
> }
>
> void trace_event_set_vcpu_state_dynamic(CPUState *vcpu,
> diff --git a/trace/control-target.c b/trace/control-target.c
> index 4ee3733..4e2e727 100644
> --- a/trace/control-target.c
> +++ b/trace/control-target.c
> @@ -18,8 +18,13 @@ void trace_event_set_state_dynamic_init(TraceEvent *ev,
> bool state)
> TraceEventID id = trace_event_get_id(ev);
> assert(trace_event_get_state_static(ev));
> /* Ignore "vcpu" property, since no vCPUs have been created yet */
> - trace_events_enabled_count += state - trace_events_dstate[id];
> - trace_events_dstate[id] = state;
> + if (state) {
> + trace_events_enabled_count++;
> + trace_events_dstate[id] = 1;
> + } else {
> + trace_events_enabled_count--;
> + trace_events_dstate[id] = 0;
> + }
> }
>
> void trace_event_set_state_dynamic(TraceEvent *ev, bool state)
> @@ -32,8 +37,13 @@ void trace_event_set_state_dynamic(TraceEvent *ev, bool
> state)
> }
> } else {
> TraceEventID id = trace_event_get_id(ev);
> - trace_events_enabled_count += state - trace_events_dstate[id];
> - trace_events_dstate[id] = state;
> + if (state) {
> + trace_events_enabled_count++;
> + trace_events_dstate[id] = 1;
> + } else {
> + trace_events_enabled_count--;
> + trace_events_dstate[id] = 0;
> + }
> }
> }
>
>
Regards,
Daniel
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