trace: iter init tweaks

Rename trace_event_iter_init() to trace_event_iter_init_pattern(),
add trace_event_iter_init_all() for interating over all events.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20210601132414.432430-3-kraxel@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

5 files changed, 29 insertions, 14 deletions

diff --git a/trace/control-target.c b/trace/control-target.c
index e293eeed7c..8418673c18 100644
--- a/trace/control-target.c
+++ b/trace/control-target.c
@@ -127,7 +127,7 @@ void trace_init_vcpu(CPUState *vcpu)
 {
     TraceEventIter iter;
     TraceEvent *ev;
-    trace_event_iter_init(&iter, NULL);
+    trace_event_iter_init_all(&iter);
     while ((ev = trace_event_iter_next(&iter)) != NULL) {
         if (trace_event_is_vcpu(ev) &&
             trace_event_get_state_static(ev) &&
diff --git a/trace/control.c b/trace/control.c
index 4be38e1af2..ed38e813b2 100644
--- a/trace/control.c
+++ b/trace/control.c
@@ -91,7 +91,7 @@ TraceEvent *trace_event_name(const char *name)
 
     TraceEventIter iter;
     TraceEvent *ev;
-    trace_event_iter_init(&iter, NULL);
+    trace_event_iter_init_all(&iter);
     while ((ev = trace_event_iter_next(&iter)) != NULL) {
         if (strcmp(trace_event_get_name(ev), name) == 0) {
             return ev;
@@ -100,10 +100,16 @@ TraceEvent *trace_event_name(const char *name)
     return NULL;
 }
 
-void trace_event_iter_init(TraceEventIter *iter, const char *pattern)
+void trace_event_iter_init_all(TraceEventIter *iter)
 {
     iter->event = 0;
     iter->group = 0;
+    iter->pattern = NULL;
+}
+
+void trace_event_iter_init_pattern(TraceEventIter *iter, const char *pattern)
+{
+    trace_event_iter_init_all(iter);
     iter->pattern = pattern;
 }
 
@@ -130,7 +136,7 @@ void trace_list_events(FILE *f)
 {
     TraceEventIter iter;
     TraceEvent *ev;
-    trace_event_iter_init(&iter, NULL);
+    trace_event_iter_init_all(&iter);
     while ((ev = trace_event_iter_next(&iter)) != NULL) {
         fprintf(f, "%s\n", trace_event_get_name(ev));
     }
@@ -150,7 +156,7 @@ static void do_trace_enable_events(const char *line_buf)
     TraceEvent *ev;
     bool is_pattern = trace_event_is_pattern(line_ptr);
 
-    trace_event_iter_init(&iter, line_ptr);
+    trace_event_iter_init_pattern(&iter, line_ptr);
     while ((ev = trace_event_iter_next(&iter)) != NULL) {
         if (!trace_event_get_state_static(ev)) {
             if (!is_pattern) {
@@ -256,7 +262,7 @@ void trace_fini_vcpu(CPUState *vcpu)
 
     trace_guest_cpu_exit(vcpu);
 
-    trace_event_iter_init(&iter, NULL);
+    trace_event_iter_init_all(&iter);
     while ((ev = trace_event_iter_next(&iter)) != NULL) {
         if (trace_event_is_vcpu(ev) &&
             trace_event_get_state_static(ev) &&
diff --git a/trace/control.h b/trace/control.h
index 9522a7b318..ce40bd0405 100644
--- a/trace/control.h
+++ b/trace/control.h
@@ -20,15 +20,24 @@ typedef struct TraceEventIter {
 
 
 /**
- * trace_event_iter_init:
+ * trace_event_iter_init_all:
  * @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
+ * for all events.
+ */
+void trace_event_iter_init_all(TraceEventIter *iter);
+
+/**
+ * trace_event_iter_init_pattern:
+ * @iter: the event iterator struct
+ * @pattern: pattern to filter events on name
+ *
+ * Initialize the event iterator struct @iter,
+ * using @pattern to filter out events
  * with non-matching names.
  */
-void trace_event_iter_init(TraceEventIter *iter, const char *pattern);
+void trace_event_iter_init_pattern(TraceEventIter *iter, const char *pattern);
 
 /**
  * trace_event_iter_next:
diff --git a/trace/qmp.c b/trace/qmp.c
index 85f81e47cc..3b4f4702b4 100644
--- a/trace/qmp.c
+++ b/trace/qmp.c
@@ -55,7 +55,7 @@ static bool check_events(bool has_vcpu, bool ignore_unavailable, bool is_pattern
         /* error for unavailable events */
         TraceEventIter iter;
         TraceEvent *ev;
-        trace_event_iter_init(&iter, name);
+        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));
@@ -90,7 +90,7 @@ TraceEventInfoList *qmp_trace_event_get_state(const char *name,
     }
 
     /* Get states (all errors checked above) */
-    trace_event_iter_init(&iter, name);
+    trace_event_iter_init_pattern(&iter, name);
     while ((ev = trace_event_iter_next(&iter)) != NULL) {
         TraceEventInfo *value;
         bool is_vcpu = trace_event_is_vcpu(ev);
@@ -153,7 +153,7 @@ void qmp_trace_event_set_state(const char *name, bool enable,
     }
 
     /* Apply changes (all errors checked above) */
-    trace_event_iter_init(&iter, name);
+    trace_event_iter_init_pattern(&iter, name);
     while ((ev = trace_event_iter_next(&iter)) != NULL) {
         if (!trace_event_get_state_static(ev) ||
             (has_vcpu && !trace_event_is_vcpu(ev))) {
diff --git a/trace/simple.c b/trace/simple.c
index 9cd2ed1fb3..97b6f85168 100644
--- a/trace/simple.c
+++ b/trace/simple.c
@@ -286,7 +286,7 @@ static int st_write_event_mapping(void)
     TraceEventIter iter;
     TraceEvent *ev;
 
-    trace_event_iter_init(&iter, NULL);
+    trace_event_iter_init_all(&iter);
     while ((ev = trace_event_iter_next(&iter)) != NULL) {
         uint64_t id = trace_event_get_id(ev);
         const char *name = trace_event_get_name(ev);