1# -*- mode: python -*- 2# 3# Copyright (C) 2011-2016 Lluís Vilanova <vilanova@ac.upc.edu> 4# 5# This work is licensed under the terms of the GNU GPL, version 2 or later. 6# See the COPYING file in the top-level directory. 7 8## 9# = Tracing commands 10## 11 12## 13# @TraceEventState: 14# 15# State of a tracing event. 16# 17# @unavailable: The event is statically disabled. 18# 19# @disabled: The event is dynamically disabled. 20# 21# @enabled: The event is dynamically enabled. 22# 23# Since: 2.2 24## 25{ 'enum': 'TraceEventState', 26 'data': ['unavailable', 'disabled', 'enabled'] } 27 28## 29# @TraceEventInfo: 30# 31# Information of a tracing event. 32# 33# @name: Event name. 34# @state: Tracing state. 35# @vcpu: Whether this is a per-vCPU event (since 2.7). 36# 37# An event is per-vCPU if it has the "vcpu" property in the "trace-events" 38# files. 39# 40# Since: 2.2 41## 42{ 'struct': 'TraceEventInfo', 43 'data': {'name': 'str', 'state': 'TraceEventState', 'vcpu': 'bool'} } 44 45## 46# @trace-event-get-state: 47# 48# Query the state of events. 49# 50# @name: Event name pattern (case-sensitive glob). 51# @vcpu: #optional The vCPU to query (any by default; since 2.7). 52# 53# Returns: a list of @TraceEventInfo for the matching events 54# 55# An event is returned if: 56# - its name matches the @name pattern, and 57# - if @vcpu is given, the event has the "vcpu" property. 58# 59# Therefore, if @vcpu is given, the operation will only match per-vCPU events, 60# returning their state on the specified vCPU. Special case: if @name is an 61# exact match, @vcpu is given and the event does not have the "vcpu" property, 62# an error is returned. 63# 64# Since: 2.2 65# 66# Example: 67# 68# -> { "execute": "trace-event-get-state", 69# "arguments": { "name": "qemu_memalign" } } 70# <- { "return": [ { "name": "qemu_memalign", "state": "disabled" } ] } 71# 72## 73{ 'command': 'trace-event-get-state', 74 'data': {'name': 'str', '*vcpu': 'int'}, 75 'returns': ['TraceEventInfo'] } 76 77## 78# @trace-event-set-state: 79# 80# Set the dynamic tracing state of events. 81# 82# @name: Event name pattern (case-sensitive glob). 83# @enable: Whether to enable tracing. 84# @ignore-unavailable: #optional Do not match unavailable events with @name. 85# @vcpu: #optional The vCPU to act upon (all by default; since 2.7). 86# 87# An event's state is modified if: 88# - its name matches the @name pattern, and 89# - if @vcpu is given, the event has the "vcpu" property. 90# 91# Therefore, if @vcpu is given, the operation will only match per-vCPU events, 92# setting their state on the specified vCPU. Special case: if @name is an exact 93# match, @vcpu is given and the event does not have the "vcpu" property, an 94# error is returned. 95# 96# Since: 2.2 97# 98# Example: 99# 100# -> { "execute": "trace-event-set-state", 101# "arguments": { "name": "qemu_memalign", "enable": "true" } } 102# <- { "return": {} } 103# 104## 105{ 'command': 'trace-event-set-state', 106 'data': {'name': 'str', 'enable': 'bool', '*ignore-unavailable': 'bool', 107 '*vcpu': 'int'} } 108