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/*
* QMP commands for tracing events.
*
* Copyright (C) 2014 Lluís 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/osdep.h"
#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);
}
}
}