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