From: David Ahern Date: Thu, 9 Apr 2015 20:15:46 +0000 (-0400) Subject: perf tools: Fix cross-endian analysis X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1060ab857f64f33a9445881fd31fa91470aeb622;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git perf tools: Fix cross-endian analysis 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 Acked-by: Jiri Olsa Cc: Namhyung Kim Link: http://lkml.kernel.org/r/1428610546-178789-1-git-send-email-david.ahern@oracle.com Signed-off-by: Arnaldo Carvalho de Melo --- diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index fff3b2a455ae..918fd8ae2d80 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -2504,8 +2504,11 @@ 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); perf_event__attr_swap(&f_attr.attr); + } tmp = lseek(fd, 0, SEEK_CUR); evsel = perf_evsel__new(&f_attr.attr);