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/*
* Interface for configuring and controlling the state of tracing events.
*
* Copyright (C) 2011-2016 Lluís Vilanova <vilanova@ac.upc.edu>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef TRACE__CONTROL_INTERNAL_H
#define TRACE__CONTROL_INTERNAL_H
extern TraceEvent trace_events[];
extern bool trace_events_dstate[];
extern int trace_events_enabled_count;
static inline TraceEventID trace_event_count(void)
{
return TRACE_EVENT_COUNT;
}
static inline TraceEvent *trace_event_id(TraceEventID id)
{
assert(id < trace_event_count());
return &trace_events[id];
}
static inline bool trace_event_is_pattern(const char *str)
{
assert(str != NULL);
return strchr(str, '*') != NULL;
}
static inline TraceEventID trace_event_get_id(TraceEvent *ev)
{
assert(ev != NULL);
return ev->id;
}
static inline TraceEventVCPUID trace_event_get_vcpu_id(TraceEvent *ev)
{
return ev->vcpu_id;
}
static inline bool trace_event_is_vcpu(TraceEvent *ev)
{
return ev->vcpu_id != TRACE_VCPU_EVENT_COUNT;
}
static inline const char * trace_event_get_name(TraceEvent *ev)
{
assert(ev != NULL);
return ev->name;
}
static inline bool trace_event_get_state_static(TraceEvent *ev)
{
assert(ev != NULL);
return ev->sstate;
}
static inline bool trace_event_get_state_dynamic_by_id(TraceEventID id)
{
/* it's on fast path, avoid consistency checks (asserts) */
return unlikely(trace_events_enabled_count) && trace_events_dstate[id];
}
static inline bool trace_event_get_state_dynamic(TraceEvent *ev)
{
TraceEventID id;
assert(trace_event_get_state_static(ev));
id = trace_event_get_id(ev);
return trace_event_get_state_dynamic_by_id(id);
}
static inline void trace_event_set_state_dynamic(TraceEvent *ev, bool state)
{
int id = trace_event_get_id(ev);
assert(ev != NULL);
assert(trace_event_get_state_static(ev));
trace_events_enabled_count += state - trace_events_dstate[id];
trace_events_dstate[id] = state;
}
#endif /* TRACE__CONTROL_INTERNAL_H */
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