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48151859 LV |
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 | ||
a4d50b1d LV |
16 | void trace_event_set_state_dynamic_init(TraceEvent *ev, bool state) |
17 | { | |
18 | TraceEventID id = trace_event_get_id(ev); | |
8eb1b9db | 19 | bool state_pre; |
a4d50b1d | 20 | assert(trace_event_get_state_static(ev)); |
8eb1b9db LV |
21 | /* |
22 | * We ignore the "vcpu" property here, since no vCPUs have been created | |
23 | * yet. Then dstate can only be 1 or 0. | |
24 | */ | |
25 | state_pre = trace_events_dstate[id]; | |
26 | if (state_pre != state) { | |
27 | if (state) { | |
28 | trace_events_enabled_count++; | |
29 | trace_events_dstate[id] = 1; | |
30 | } else { | |
31 | trace_events_enabled_count--; | |
32 | trace_events_dstate[id] = 0; | |
33 | } | |
34 | } | |
a4d50b1d LV |
35 | } |
36 | ||
48151859 LV |
37 | void trace_event_set_state_dynamic(TraceEvent *ev, bool state) |
38 | { | |
39 | CPUState *vcpu; | |
40 | assert(trace_event_get_state_static(ev)); | |
41 | if (trace_event_is_vcpu(ev)) { | |
42 | CPU_FOREACH(vcpu) { | |
43 | trace_event_set_vcpu_state_dynamic(vcpu, ev, state); | |
44 | } | |
45 | } else { | |
8eb1b9db | 46 | /* Without the "vcpu" property, dstate can only be 1 or 0 */ |
48151859 | 47 | TraceEventID id = trace_event_get_id(ev); |
8eb1b9db LV |
48 | bool state_pre = trace_events_dstate[id]; |
49 | if (state_pre != state) { | |
50 | if (state) { | |
51 | trace_events_enabled_count++; | |
52 | trace_events_dstate[id] = 1; | |
53 | } else { | |
54 | trace_events_enabled_count--; | |
55 | trace_events_dstate[id] = 0; | |
56 | } | |
57 | } | |
48151859 LV |
58 | } |
59 | } | |
60 | ||
61 | void trace_event_set_vcpu_state_dynamic(CPUState *vcpu, | |
62 | TraceEvent *ev, bool state) | |
63 | { | |
64 | TraceEventID id; | |
65 | TraceEventVCPUID vcpu_id; | |
66 | bool state_pre; | |
67 | assert(trace_event_get_state_static(ev)); | |
68 | assert(trace_event_is_vcpu(ev)); | |
69 | id = trace_event_get_id(ev); | |
70 | vcpu_id = trace_event_get_vcpu_id(ev); | |
71 | state_pre = test_bit(vcpu_id, vcpu->trace_dstate); | |
72 | if (state_pre != state) { | |
73 | if (state) { | |
74 | trace_events_enabled_count++; | |
75 | set_bit(vcpu_id, vcpu->trace_dstate); | |
76 | trace_events_dstate[id]++; | |
77 | } else { | |
78 | trace_events_enabled_count--; | |
79 | clear_bit(vcpu_id, vcpu->trace_dstate); | |
80 | trace_events_dstate[id]--; | |
81 | } | |
82 | } | |
83 | } |