/* * QMP commands for tracing events. * * Copyright (C) 2014 LluĂs Vilanova <vilanova@ac.upc.edu> * * This work is licensed under the terms of the GNU GPL, version 2 or later. * See the COPYING file in the top-level directory. */ #include "qemu/typedefs.h" #include "qmp-commands.h" #include "trace/control.h" TraceEventInfoList *qmp_trace_event_get_state(const char *name, Error **errp) { TraceEventInfoList *events = NULL; bool found = false; TraceEvent *ev; ev = NULL; while ((ev = trace_event_pattern(name, ev)) != NULL) { TraceEventInfoList *elem = g_new(TraceEventInfoList, 1); elem->value = g_new(TraceEventInfo, 1); elem->value->name = g_strdup(trace_event_get_name(ev)); if (!trace_event_get_state_static(ev)) { elem->value->state = TRACE_EVENT_STATE_UNAVAILABLE; } else if (!trace_event_get_state_dynamic(ev)) { elem->value->state = TRACE_EVENT_STATE_DISABLED; } else { elem->value->state = TRACE_EVENT_STATE_ENABLED; } elem->next = events; events = elem; found = true; } if (!found && !trace_event_is_pattern(name)) { error_setg(errp, "unknown event \"%s\"", name); } return events; } void qmp_trace_event_set_state(const char *name, bool enable, bool has_ignore_unavailable, bool ignore_unavailable, Error **errp) { bool found = false; TraceEvent *ev; /* Check all selected events are dynamic */ ev = NULL; while ((ev = trace_event_pattern(name, ev)) != NULL) { found = true; if (!(has_ignore_unavailable && ignore_unavailable) && !trace_event_get_state_static(ev)) { error_setg(errp, "cannot set dynamic tracing state for \"%s\"", trace_event_get_name(ev)); return; } } if (!found && !trace_event_is_pattern(name)) { error_setg(errp, "unknown event \"%s\"", name); return; } /* Apply changes */ ev = NULL; while ((ev = trace_event_pattern(name, ev)) != NULL) { if (trace_event_get_state_static(ev)) { trace_event_set_state_dynamic(ev, enable); } } }