* Namhyung Kim <namhy...@kernel.org> wrote:
> --- a/tools/perf/util/header.c
> +++ b/tools/perf/util/header.c
> @@ -2753,6 +2753,15 @@ int perf_session__read_header(struct perf_session
> *session)
> if (perf_file_header__read(&f_header, header, fd) < 0)
> return -EINVAL;
>
> + /*
> + * Sanity check that perf.data was written cleanly; data size is
> + * initialized to 0 and updated only if the on_exit function is run.
> + * If data size is still 0 then the file contains only partial
> + * information. Just warn user and process it as much as it can.
> + */
> + if (f_header.data.size == 0)
> + pr_warning("Data size is 0. Was the record command properly
> terminated?\n");
Just a detail: it would be nice to make all the user facing messages in
tools/perf/util/header.c more specific and more structured. For example
prefixing it with 'perf header:' would be fine:
WARNING: perf/header: Data size is 0. Was the 'perf record' command
properly terminated?
or something like that.
etc.
Ingo
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