[PATCH] perf tool: Fix cross-endian analysis

From: David Ahern
Date: Thu Apr 09 2015 - 16:16:05 EST

Trying to analyze a big endian data file on little endian system
fails with the error:
0xa9b40 [0x70]: failed to process type: 9

The problem is that header parsing is not done correctly because
the file attributes are not swapped. Make it so. With this patch
able to analyze a sparc64 data file on x86_64.

Signed-off-by: David Ahern <david.ahern@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
tools/perf/util/header.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index e38cf62..45b7e72 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -2586,8 +2586,11 @@ int perf_session__read_header(struct perf_session *session)
if (read_attr(fd, header, &f_attr) < 0)
goto out_errno;

- if (header->needs_swap)
+ if (header->needs_swap) {
+ f_attr.ids.size = bswap_64(f_attr.ids.size);
+ f_attr.ids.offset = bswap_64(f_attr.ids.offset);
+ }

tmp = lseek(fd, 0, SEEK_CUR);
evsel = perf_evsel__new(&f_attr.attr);

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