| 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 "trace/control.h" |
| 12 | |
| 13 | |
| 14 | void trace_event_set_state_dynamic_init(TraceEvent *ev, bool state) |
| 15 | { |
| 16 | trace_event_set_state_dynamic(ev, state); |
| 17 | } |
| 18 | |
| 19 | void trace_event_set_state_dynamic(TraceEvent *ev, bool state) |
| 20 | { |
| 21 | bool state_pre; |
| 22 | assert(trace_event_get_state_static(ev)); |
| 23 | |
| 24 | /* |
| 25 | * We ignore the "vcpu" property here, since there's no target code. Then |
| 26 | * dstate can only be 1 or 0. |
| 27 | */ |
| 28 | state_pre = *(ev->dstate); |
| 29 | if (state_pre != state) { |
| 30 | if (state) { |
| 31 | trace_events_enabled_count++; |
| 32 | *(ev->dstate) = 1; |
| 33 | } else { |
| 34 | trace_events_enabled_count--; |
| 35 | *(ev->dstate) = 0; |
| 36 | } |
| 37 | } |
| 38 | } |