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[PULL 5/6] trace/simple: add st_init_group
From: |
Stefan Hajnoczi |
Subject: |
[PULL 5/6] trace/simple: add st_init_group |
Date: |
Mon, 12 Jul 2021 17:50:00 +0100 |
From: Gerd Hoffmann <kraxel@redhat.com>
Add helper function and call it for each trace event group added.
Makes sure that events added at module load time are initialized
properly.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20210601132414.432430-6-kraxel@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
trace/simple.h | 1 +
trace/control.c | 4 ++++
trace/simple.c | 12 ++++++++++++
3 files changed, 17 insertions(+)
diff --git a/trace/simple.h b/trace/simple.h
index 26ccbc8b8a..ee1983ce56 100644
--- a/trace/simple.h
+++ b/trace/simple.h
@@ -15,6 +15,7 @@ void st_print_trace_file_status(void);
bool st_set_trace_file_enabled(bool enable);
void st_set_trace_file(const char *file);
bool st_init(void);
+void st_init_group(size_t group);
void st_flush_trace_buffer(void);
typedef struct {
diff --git a/trace/control.c b/trace/control.c
index 2c904b7ee4..d5b68e846e 100644
--- a/trace/control.c
+++ b/trace/control.c
@@ -82,6 +82,10 @@ void trace_event_register_group(TraceEvent **events)
event_groups = g_renew(TraceEventGroup, event_groups, nevent_groups + 1);
event_groups[nevent_groups].events = events;
nevent_groups++;
+
+#ifdef CONFIG_TRACE_SIMPLE
+ st_init_group(nevent_groups - 1);
+#endif
}
diff --git a/trace/simple.c b/trace/simple.c
index ec2156d135..ac499edee0 100644
--- a/trace/simple.c
+++ b/trace/simple.c
@@ -422,3 +422,15 @@ bool st_init(void)
atexit(st_flush_trace_buffer);
return true;
}
+
+void st_init_group(size_t group)
+{
+ TraceEventIter iter;
+
+ if (!trace_writeout_enabled) {
+ return;
+ }
+
+ trace_event_iter_init_group(&iter, group);
+ st_write_event_mapping(&iter);
+}
--
2.31.1
- [PULL 0/6] Tracing patches, Stefan Hajnoczi, 2021/07/12
- [PULL 1/6] qemu-trace-stap: changing SYSTEMTAP_TAPSET considered harmful., Stefan Hajnoczi, 2021/07/12
- [PULL 2/6] trace: iter init tweaks, Stefan Hajnoczi, 2021/07/12
- [PULL 3/6] trace: add trace_event_iter_init_group, Stefan Hajnoczi, 2021/07/12
- [PULL 4/6] trace/simple: pass iter to st_write_event_mapping, Stefan Hajnoczi, 2021/07/12
- [PULL 5/6] trace/simple: add st_init_group,
Stefan Hajnoczi <=
- [PULL 6/6] trace, lttng: require .pc files, Stefan Hajnoczi, 2021/07/12
- Re: [PULL 0/6] Tracing patches, Peter Maydell, 2021/07/13