1 /* 2 * Interface for configuring and controlling the state of tracing events. 3 * 4 * Copyright (C) 2014-2016 Lluís Vilanova <vilanova@ac.upc.edu> 5 * 6 * This work is licensed under the terms of the GNU GPL, version 2 or later. 7 * See the COPYING file in the top-level directory. 8 */ 9 10 #include "qemu/osdep.h" 11 #include "cpu.h" 12 #include "trace/control.h" 13 #include "translate-all.h" 14 15 16 void trace_event_set_state_dynamic(TraceEvent *ev, bool state) 17 { 18 CPUState *vcpu; 19 assert(trace_event_get_state_static(ev)); 20 if (trace_event_is_vcpu(ev)) { 21 CPU_FOREACH(vcpu) { 22 trace_event_set_vcpu_state_dynamic(vcpu, ev, state); 23 } 24 } else { 25 TraceEventID id = trace_event_get_id(ev); 26 trace_events_enabled_count += state - trace_events_dstate[id]; 27 trace_events_dstate[id] = state; 28 } 29 } 30 31 void trace_event_set_vcpu_state_dynamic(CPUState *vcpu, 32 TraceEvent *ev, bool state) 33 { 34 TraceEventID id; 35 TraceEventVCPUID vcpu_id; 36 bool state_pre; 37 assert(trace_event_get_state_static(ev)); 38 assert(trace_event_is_vcpu(ev)); 39 id = trace_event_get_id(ev); 40 vcpu_id = trace_event_get_vcpu_id(ev); 41 state_pre = test_bit(vcpu_id, vcpu->trace_dstate); 42 if (state_pre != state) { 43 if (state) { 44 trace_events_enabled_count++; 45 set_bit(vcpu_id, vcpu->trace_dstate); 46 trace_events_dstate[id]++; 47 } else { 48 trace_events_enabled_count--; 49 clear_bit(vcpu_id, vcpu->trace_dstate); 50 trace_events_dstate[id]--; 51 } 52 } 53 } 54