perf evsel: Fix order of event list deletion

We need to defer calling perf_evsel_list__delete() till after atexit
registered routines, because we need to traverse the events being
recorded at that time at least on 'perf record'.

This fixes the problem reported by Thomas Renninger where cmd_record
called by cmd_timechart would not write the tracing data to the perf.data
file header because the evsel_list at atexit (control+C on 'perf timechart
record') time would be empty, being already deleted by run_builtin(),
and thus 'perf timechart' when trying to process such perf.data file would
die with:

"no trace data in the file"

Problem introduced in 70d544d.

Reported-by: Thomas Renninger <trenn@suse.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Renninger <trenn@suse.de>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2011-01-11 12:42:00 -02:00
Родитель 3d03e2ea74
Коммит bd3bfe9eda
4 изменённых файлов: 3 добавлений и 2 удалений

Просмотреть файл

@ -480,6 +480,7 @@ static void atexit_header(void)
process_buildids();
perf_header__write(&session->header, output, true);
perf_session__delete(session);
perf_evsel_list__delete();
symbol__exit();
}
}

Просмотреть файл

@ -743,6 +743,7 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used)
out_free_fd:
list_for_each_entry(pos, &evsel_list, node)
perf_evsel__free_stat_priv(pos);
perf_evsel_list__delete();
out:
thread_map__delete(threads);
threads = NULL;

Просмотреть файл

@ -1490,6 +1490,7 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
out_free_fd:
list_for_each_entry(pos, &evsel_list, node)
perf_evsel__free_mmap(pos);
perf_evsel_list__delete();
return status;
}

Просмотреть файл

@ -286,8 +286,6 @@ static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
status = p->fn(argc, argv, prefix);
exit_browser(status);
perf_evsel_list__delete();
if (status)
return status & 0xff;