1 /* 2 * Interface for configuring and controlling the state of tracing events. 3 * 4 * Copyright (C) 2011-2016 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 #ifndef TRACE__CONTROL_INTERNAL_H 11 #define TRACE__CONTROL_INTERNAL_H 12 13 #include <stddef.h> /* size_t */ 14 15 #include "qom/cpu.h" 16 17 18 extern TraceEvent trace_events[]; 19 extern int trace_events_enabled_count; 20 21 22 static inline bool trace_event_is_pattern(const char *str) 23 { 24 assert(str != NULL); 25 return strchr(str, '*') != NULL; 26 } 27 28 static inline TraceEventID trace_event_get_id(TraceEvent *ev) 29 { 30 assert(ev != NULL); 31 return ev->id; 32 } 33 34 static inline TraceEventVCPUID trace_event_get_vcpu_id(TraceEvent *ev) 35 { 36 return ev->vcpu_id; 37 } 38 39 static inline bool trace_event_is_vcpu(TraceEvent *ev) 40 { 41 return ev->vcpu_id != TRACE_VCPU_EVENT_COUNT; 42 } 43 44 static inline const char * trace_event_get_name(TraceEvent *ev) 45 { 46 assert(ev != NULL); 47 return ev->name; 48 } 49 50 static inline bool trace_event_get_state_static(TraceEvent *ev) 51 { 52 assert(ev != NULL); 53 return ev->sstate; 54 } 55 56 /* it's on fast path, avoid consistency checks (asserts) */ 57 #define trace_event_get_state_dynamic_by_id(id) \ 58 (unlikely(trace_events_enabled_count) && _ ## id ## _DSTATE) 59 60 static inline bool trace_event_get_state_dynamic(TraceEvent *ev) 61 { 62 return unlikely(trace_events_enabled_count) && *ev->dstate; 63 } 64 65 static inline bool trace_event_get_vcpu_state_dynamic_by_vcpu_id(CPUState *vcpu, 66 TraceEventVCPUID id) 67 { 68 /* it's on fast path, avoid consistency checks (asserts) */ 69 if (unlikely(trace_events_enabled_count)) { 70 return test_bit(id, vcpu->trace_dstate); 71 } else { 72 return false; 73 } 74 } 75 76 static inline bool trace_event_get_vcpu_state_dynamic(CPUState *vcpu, 77 TraceEvent *ev) 78 { 79 TraceEventVCPUID id; 80 assert(trace_event_is_vcpu(ev)); 81 id = trace_event_get_vcpu_id(ev); 82 return trace_event_get_vcpu_state_dynamic_by_vcpu_id(vcpu, id); 83 } 84 85 #endif /* TRACE__CONTROL_INTERNAL_H */ 86