2 files changed, 48 insertions, 0 deletions
diff --git a/trace/control.c b/trace/control.c
index 10b3e9baba..5a9bb5a8c7 100644
--- a/trace/control.c
+++ b/trace/control.c
@@ -125,6 +125,27 @@ TraceEvent *trace_event_pattern(const char *pat, TraceEvent *ev)
     return NULL;
 }
 
+void trace_event_iter_init(TraceEventIter *iter, const char *pattern)
+{
+    iter->event = 0;
+    iter->pattern = pattern;
+}
+
+TraceEvent *trace_event_iter_next(TraceEventIter *iter)
+{
+    while (iter->event < TRACE_EVENT_COUNT) {
+        TraceEvent *ev = &(trace_events[iter->event]);
+        iter->event++;
+        if (!iter->pattern ||
+            pattern_glob(iter->pattern,
+                         trace_event_get_name(ev))) {
+            return ev;
+        }
+    }
+
+    return NULL;
+}
+
 void trace_list_events(void)
 {
     int i;
diff --git a/trace/control.h b/trace/control.h
index a22d11242e..36d7cd23ed 100644
--- a/trace/control.h
+++ b/trace/control.h
@@ -13,6 +13,10 @@
 #include "qemu-common.h"
 #include "trace/generated-events.h"
 
+typedef struct TraceEventIter {
+    size_t event;
+    const char *pattern;
+} TraceEventIter;
 
 /**
  * TraceEventID:
@@ -25,6 +29,29 @@
  */
 enum TraceEventID;
 
+
+/**
+ * trace_event_iter_init:
+ * @iter: the event iterator struct
+ * @pattern: optional pattern to filter events on name
+ *
+ * Initialize the event iterator struct @iter,
+ * optionally using @pattern to filter out events
+ * with non-matching names.
+ */
+void trace_event_iter_init(TraceEventIter *iter, const char *pattern);
+
+/**
+ * trace_event_iter_next:
+ * @iter: the event iterator struct
+ *
+ * Get the next event, if any. When this returns NULL,
+ * the iterator should no longer be used.
+ *
+ * Returns: the next event, or NULL if no more events exist
+ */
+TraceEvent *trace_event_iter_next(TraceEventIter *iter);
+
 /**
  * trace_event_id:
  * @id: Event identifier.