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trace/simple: add st_init_group
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>
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kraxel authored and stefanhaRH committed Jul 12, 2021
1 parent 3f2a098 commit 263b6e9
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Showing 3 changed files with 17 additions and 0 deletions.
4 changes: 4 additions & 0 deletions trace/control.c
Expand Up @@ -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
}


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12 changes: 12 additions & 0 deletions trace/simple.c
Expand Up @@ -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);
}
1 change: 1 addition & 0 deletions trace/simple.h
Expand Up @@ -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 {
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