Namhyung Kim 7a0ef23400 perf session: Fix infinite loop on invalid perf.data file ... perf-record updates the header in the perf.data file at termination. Without this update perf-report (and other processing built-ins) it caused an infinite loop when perf report (or something like) called. This is because the algorithm in __perf_session__process_events() depends on the data_size which is read from file header. Use file size directly instead in this case to do the best-effort processing. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: David Ahern <dsahern@gmail.com> Tested-by: Sonny Rao <sonnyrao@chromium.org> Acked-by: Ingo Molnar <mingo@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Sonny Rao <sonnyrao@chromium.org> Link: http://lkml.kernel.org/r/1380529188-27193-1-git-send-email-namhyung@kernel.org Signed-off-by: David Ahern <dsahern@gmail.com> [ Reworded warning as per Ingo Molnar suggestion, replaces 'perf.data' with session->filename, to precisely identify the data file involved ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>		2019-07-27 21:52:40 +02:00
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