Commit 43b48cfc authored by Paolo Bonzini's avatar Paolo Bonzini Committed by Stefan Hajnoczi
Browse files

trace: count number of enabled events 



This lets trace_event_get_state_dynamic quickly return false.  Right
now there is hardly any benefit because there are also many assertions
and indirections, but the next patch will streamline all of this.

Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
parent c65db770

trace/control-internal.h

+3 −1
Original line number Diff line number Diff line
@@ -14,6 +14,7 @@ 




extern TraceEvent trace_events[];

extern int trace_events_enabled_count;





static inline TraceEventID trace_event_count(void)
@@ -54,13 +55,14 @@ static inline bool trace_event_get_state_static(TraceEvent *ev) 
static inline bool trace_event_get_state_dynamic(TraceEvent *ev)

{

    assert(ev != NULL);

    return ev->dstate;

    return unlikely(trace_events_enabled_count) && ev->dstate;

}



static inline void trace_event_set_state_dynamic(TraceEvent *ev, bool state)

{

    assert(ev != NULL);

    assert(trace_event_get_state_static(ev));

    trace_events_enabled_count += state - ev->dstate;

    ev->dstate = state;

}

trace/control.c

+2 −0
Original line number Diff line number Diff line
@@ -16,6 +16,8 @@ 
#endif

#include "qemu/error-report.h"



int trace_events_enabled_count;



TraceEvent *trace_event_name(const char *name)

{

    assert(name != NULL);