| 1 | /* |
| 2 | * Interface for configuring and controlling the state of tracing events. |
| 3 | * |
| 4 | * Copyright (C) 2014-2017 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 | bool state_pre; |
| 17 | assert(trace_event_get_state_static(ev)); |
| 18 | /* |
| 19 | * We ignore the "vcpu" property here, since no vCPUs have been created |
| 20 | * yet. Then dstate can only be 1 or 0. |
| 21 | */ |
| 22 | state_pre = *ev->dstate; |
| 23 | if (state_pre != state) { |
| 24 | if (state) { |
| 25 | trace_events_enabled_count++; |
| 26 | *ev->dstate = 1; |
| 27 | } else { |
| 28 | trace_events_enabled_count--; |
| 29 | *ev->dstate = 0; |
| 30 | } |
| 31 | } |
| 32 | } |
| 33 | |
| 34 | void trace_event_set_state_dynamic(TraceEvent *ev, bool state) |
| 35 | { |
| 36 | assert(trace_event_get_state_static(ev)); |
| 37 | |
| 38 | /* |
| 39 | * There is no longer a "vcpu" property, dstate can only be 1 or |
| 40 | * 0. With it, we haven't instantiated any vCPU yet, so we will |
| 41 | * set a global state instead, and trace_init_vcpu will reconcile |
| 42 | * it afterwards. |
| 43 | */ |
| 44 | bool state_pre = *ev->dstate; |
| 45 | if (state_pre != state) { |
| 46 | if (state) { |
| 47 | trace_events_enabled_count++; |
| 48 | *ev->dstate = 1; |
| 49 | } else { |
| 50 | trace_events_enabled_count--; |
| 51 | *ev->dstate = 0; |
| 52 | } |
| 53 | } |
| 54 | } |