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perf header: Allow header->data_offset to be predetermined 

It will be necessary to predetermine header->data_offset to allow space
for attributes that are added later.  Consequently, do not change
header->data_offset if it is non-zero.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1386765443-26966-17-git-send-email-alexander.shishkin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2013-12-11 14:36:28 +02:00 committed by Arnaldo Carvalho de Melo
parent 1a47245d2f
commit d645c442e6
1 changed files with 2 additions and 1 deletions
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3
tools/perf/util/header.c
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@ -2327,7 +2327,8 @@ int perf_session__write_header(struct perf_session *session,
}
}
header->data_offset = lseek(fd, 0, SEEK_CUR);
if (!header->data_offset)
header->data_offset = lseek(fd, 0, SEEK_CUR);
header->feat_offset = header->data_offset + header->data_size;
if (at_exit) {