trace: [hmp] Reimplement "trace-event" and "info trace-events" using QMP

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Message-id: 20140825112002.31112.60143.stgit@fimbulvetr.bsc.es
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

monitor.c

@@ -886,19 +886,12 @@ static void do_trace_event_set_state(Monitor *mon, const QDict *qdict)
 {
     const char *tp_name = qdict_get_str(qdict, "name");
     bool new_state = qdict_get_bool(qdict, "option");
+    Error *local_err = NULL;
 
-    bool found = false;
-    TraceEvent *ev = NULL;
-    while ((ev = trace_event_pattern(tp_name, ev)) != NULL) {
-        found = true;
-        if (!trace_event_get_state_static(ev)) {
-            monitor_printf(mon, "event \"%s\" is not traceable\n", tp_name);
-        } else {
-            trace_event_set_state_dynamic(ev, new_state);
-        }
-    }
-    if (!trace_event_is_pattern(tp_name) && !found) {
-        monitor_printf(mon, "unknown event name \"%s\"\n", tp_name);
+    qmp_trace_event_set_state(tp_name, new_state, true, true, &local_err);
+    if (local_err) {
+        qerror_report_err(local_err);
+        error_free(local_err);
     }
 }
 
@@ -1079,7 +1072,15 @@ static void do_info_cpu_stats(Monitor *mon, const QDict *qdict)
 
 static void do_trace_print_events(Monitor *mon, const QDict *qdict)
 {
-    trace_print_events((FILE *)mon, &monitor_fprintf);
+    TraceEventInfoList *events = qmp_trace_event_get_state("*", NULL);
+    TraceEventInfoList *elem;
+
+    for (elem = events; elem != NULL; elem = elem->next) {
+        monitor_printf(mon, "%s : state %u\n",
+                       elem->value->name,
+                       elem->value->state == TRACE_EVENT_STATE_ENABLED ? 1 : 0);
+    }
+    qapi_free_TraceEventInfoList(events);
 }
 
 static int client_migrate_info(Monitor *mon, const QDict *qdict,

trace/control.c

@@ -85,19 +85,6 @@ TraceEvent *trace_event_pattern(const char *pat, TraceEvent *ev)
     return NULL;
 }
 
-void trace_print_events(FILE *stream, fprintf_function stream_printf)
-{
-    TraceEventID i;
-
-    for (i = 0; i < trace_event_count(); i++) {
-        TraceEvent *ev = trace_event_id(i);
-        stream_printf(stream, "%s [Event ID %u] : state %u\n",
-                      trace_event_get_name(ev), i,
-                      trace_event_get_state_static(ev) &&
-                      trace_event_get_state_dynamic(ev));
-    }
-}
-
 static void trace_init_events(const char *fname)
 {
     Location loc;

trace/control.h

@@ -148,13 +148,6 @@ static void trace_event_set_state_dynamic(TraceEvent *ev, bool state);
 
 
 
-/**
- * trace_print_events:
- *
- * Print the state of all events.
- */
-void trace_print_events(FILE *stream, fprintf_function stream_printf);
-
 /**
  * trace_init_backends:
  * @events: Name of file with events to be enabled at startup; may be NULL.