Provide the missing LIBUSB_LOG_LEVEL_* for older libusb or FreeBSD. Providing just...
[qemu.git] / trace / qmp.c
1 /*
2 * QMP commands for tracing events.
3 *
4 * Copyright (C) 2014 LluĂ­s Vilanova <vilanova@ac.upc.edu>
5 *
6 * This work is licensed under the terms of the GNU GPL, version 2 or later.
7 * See the COPYING file in the top-level directory.
8 */
9
10 #include "qemu/typedefs.h"
11 #include "qmp-commands.h"
12 #include "trace/control.h"
13
14
15 TraceEventInfoList *qmp_trace_event_get_state(const char *name, Error **errp)
16 {
17 TraceEventInfoList *events = NULL;
18 bool found = false;
19 TraceEvent *ev;
20
21 ev = NULL;
22 while ((ev = trace_event_pattern(name, ev)) != NULL) {
23 TraceEventInfoList *elem = g_new(TraceEventInfoList, 1);
24 elem->value = g_new(TraceEventInfo, 1);
25 elem->value->name = g_strdup(trace_event_get_name(ev));
26 if (!trace_event_get_state_static(ev)) {
27 elem->value->state = TRACE_EVENT_STATE_UNAVAILABLE;
28 } else if (!trace_event_get_state_dynamic(ev)) {
29 elem->value->state = TRACE_EVENT_STATE_DISABLED;
30 } else {
31 elem->value->state = TRACE_EVENT_STATE_ENABLED;
32 }
33 elem->next = events;
34 events = elem;
35 found = true;
36 }
37
38 if (!found && !trace_event_is_pattern(name)) {
39 error_setg(errp, "unknown event \"%s\"", name);
40 }
41
42 return events;
43 }
44
45 void qmp_trace_event_set_state(const char *name, bool enable,
46 bool has_ignore_unavailable,
47 bool ignore_unavailable, Error **errp)
48 {
49 bool found = false;
50 TraceEvent *ev;
51
52 /* Check all selected events are dynamic */
53 ev = NULL;
54 while ((ev = trace_event_pattern(name, ev)) != NULL) {
55 found = true;
56 if (!(has_ignore_unavailable && ignore_unavailable) &&
57 !trace_event_get_state_static(ev)) {
58 error_setg(errp, "cannot set dynamic tracing state for \"%s\"",
59 trace_event_get_name(ev));
60 return;
61 }
62 }
63 if (!found && !trace_event_is_pattern(name)) {
64 error_setg(errp, "unknown event \"%s\"", name);
65 return;
66 }
67
68 /* Apply changes */
69 ev = NULL;
70 while ((ev = trace_event_pattern(name, ev)) != NULL) {
71 if (trace_event_get_state_static(ev)) {
72 trace_event_set_state_dynamic(ev, enable);
73 }
74 }
75 }