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/*
* QMP commands for tracing events.
*
* Copyright (C) 2014-2016 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 "qapi/error.h"
#include "qapi/qapi-commands-trace.h"
#include "control.h"
static bool check_events(bool ignore_unavailable, bool is_pattern,
const char *name, Error **errp)
{
if (!is_pattern) {
TraceEvent *ev = trace_event_name(name);
/* error for non-existing event */
if (ev == NULL) {
error_setg(errp, "unknown event \"%s\"", name);
return false;
}
/* error for unavailable event */
if (!ignore_unavailable && !trace_event_get_state_static(ev)) {
error_setg(errp, "event \"%s\" is disabled", name);
return false;
}
return true;
} else {
/* error for unavailable events */
TraceEventIter iter;
TraceEvent *ev;
trace_event_iter_init_pattern(&iter, name);
while ((ev = trace_event_iter_next(&iter)) != NULL) {
if (!ignore_unavailable && !trace_event_get_state_static(ev)) {
error_setg(errp, "event \"%s\" is disabled", trace_event_get_name(ev));
return false;
}
}
return true;
}
}
TraceEventInfoList *qmp_trace_event_get_state(const char *name,
Error **errp)
{
TraceEventInfoList *events = NULL;
TraceEventIter iter;
TraceEvent *ev;
bool is_pattern = trace_event_is_pattern(name);
/* Check events */
if (!check_events(true, is_pattern, name, errp)) {
return NULL;
}
/* Get states (all errors checked above) */
trace_event_iter_init_pattern(&iter, name);
while ((ev = trace_event_iter_next(&iter)) != NULL) {
TraceEventInfo *value;
value = g_new(TraceEventInfo, 1);
value->name = g_strdup(trace_event_get_name(ev));
if (!trace_event_get_state_static(ev)) {
value->state = TRACE_EVENT_STATE_UNAVAILABLE;
} else {
if (trace_event_get_state_dynamic(ev)) {
value->state = TRACE_EVENT_STATE_ENABLED;
} else {
value->state = TRACE_EVENT_STATE_DISABLED;
}
}
QAPI_LIST_PREPEND(events, value);
}
return events;
}
void qmp_trace_event_set_state(const char *name, bool enable,
bool has_ignore_unavailable, bool ignore_unavailable,
Error **errp)
{
TraceEventIter iter;
TraceEvent *ev;
bool is_pattern = trace_event_is_pattern(name);
/* Check events */
if (!check_events(has_ignore_unavailable && ignore_unavailable,
is_pattern, name, errp)) {
return;
}
/* Apply changes (all errors checked above) */
trace_event_iter_init_pattern(&iter, name);
while ((ev = trace_event_iter_next(&iter)) != NULL) {
if (!trace_event_get_state_static(ev)) {
continue;
}
trace_event_set_state_dynamic(ev, enable);
}
}
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