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Diffstat (limited to 'trace/control-vcpu.h')
| -rw-r--r-- | trace/control-vcpu.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/trace/control-vcpu.h b/trace/control-vcpu.h new file mode 100644 index 0000000000..a8f1035c2e --- /dev/null +++ b/trace/control-vcpu.h @@ -0,0 +1,63 @@ +/* + * 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_VCPU_H +#define TRACE__CONTROL_VCPU_H + +#include "control.h" +#include "event-internal.h" +#include "qom/cpu.h" + +/** + * trace_event_get_vcpu_state: + * @vcpu: Target vCPU. + * @id: Event identifier name. + * + * Get the tracing state of an event (both static and dynamic) for the given + * vCPU. + * + * If the event has the disabled property, the check will have no performance + * impact. + */ +#define trace_event_get_vcpu_state(vcpu, id) \ + ((id ##_ENABLED) && \ + trace_event_get_vcpu_state_dynamic_by_vcpu_id( \ + vcpu, _ ## id ## _EVENT.vcpu_id)) + +/** + * trace_event_get_vcpu_state_dynamic: + * + * Get the dynamic tracing state of an event for the given vCPU. + */ +static bool trace_event_get_vcpu_state_dynamic(CPUState *vcpu, TraceEvent *ev); + +#include "control-internal.h" + +static inline bool +trace_event_get_vcpu_state_dynamic_by_vcpu_id(CPUState *vcpu, + uint32_t vcpu_id) +{ + /* it's on fast path, avoid consistency checks (asserts) */ + if (unlikely(trace_events_enabled_count)) { + return test_bit(vcpu_id, vcpu->trace_dstate); + } else { + return false; + } +} + +static inline bool trace_event_get_vcpu_state_dynamic(CPUState *vcpu, + TraceEvent *ev) +{ + uint32_t vcpu_id; + assert(trace_event_is_vcpu(ev)); + vcpu_id = trace_event_get_vcpu_id(ev); + return trace_event_get_vcpu_state_dynamic_by_vcpu_id(vcpu, vcpu_id); +} + +#endif |