4815185902
Each vCPU gets a 'trace_dstate' bitmap to control the per-vCPU dynamic tracing state of events with the 'vcpu' property. Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
103 lines
2.5 KiB
C
103 lines
2.5 KiB
C
/*
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* Interface for configuring and controlling the state of tracing events.
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*
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* Copyright (C) 2011-2016 Lluís Vilanova <vilanova@ac.upc.edu>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef TRACE__CONTROL_INTERNAL_H
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#define TRACE__CONTROL_INTERNAL_H
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#include <stddef.h> /* size_t */
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#include "qom/cpu.h"
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extern TraceEvent trace_events[];
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extern uint16_t trace_events_dstate[];
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extern int trace_events_enabled_count;
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static inline TraceEventID trace_event_count(void)
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{
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return TRACE_EVENT_COUNT;
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}
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static inline TraceEvent *trace_event_id(TraceEventID id)
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{
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assert(id < trace_event_count());
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return &trace_events[id];
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}
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static inline bool trace_event_is_pattern(const char *str)
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{
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assert(str != NULL);
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return strchr(str, '*') != NULL;
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}
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static inline TraceEventID trace_event_get_id(TraceEvent *ev)
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{
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assert(ev != NULL);
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return ev->id;
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}
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static inline TraceEventVCPUID trace_event_get_vcpu_id(TraceEvent *ev)
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{
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return ev->vcpu_id;
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}
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static inline bool trace_event_is_vcpu(TraceEvent *ev)
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{
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return ev->vcpu_id != TRACE_VCPU_EVENT_COUNT;
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}
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static inline const char * trace_event_get_name(TraceEvent *ev)
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{
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assert(ev != NULL);
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return ev->name;
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}
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static inline bool trace_event_get_state_static(TraceEvent *ev)
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{
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assert(ev != NULL);
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return ev->sstate;
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}
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static inline bool trace_event_get_state_dynamic_by_id(TraceEventID id)
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{
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/* it's on fast path, avoid consistency checks (asserts) */
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return unlikely(trace_events_enabled_count) && trace_events_dstate[id];
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}
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static inline bool trace_event_get_state_dynamic(TraceEvent *ev)
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{
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TraceEventID id;
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assert(trace_event_get_state_static(ev));
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id = trace_event_get_id(ev);
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return trace_event_get_state_dynamic_by_id(id);
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}
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static inline bool trace_event_get_vcpu_state_dynamic_by_vcpu_id(CPUState *vcpu,
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TraceEventVCPUID id)
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{
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/* it's on fast path, avoid consistency checks (asserts) */
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if (unlikely(trace_events_enabled_count)) {
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return test_bit(id, vcpu->trace_dstate);
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} else {
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return false;
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}
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}
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static inline bool trace_event_get_vcpu_state_dynamic(CPUState *vcpu,
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TraceEvent *ev)
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{
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TraceEventVCPUID id;
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assert(trace_event_is_vcpu(ev));
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id = trace_event_get_vcpu_id(ev);
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return trace_event_get_vcpu_state_dynamic_by_vcpu_id(vcpu, id);
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}
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#endif /* TRACE__CONTROL_INTERNAL_H */
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