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| author | James Clark <james.clark@arm.com> | 2021-08-06 14:41:09 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-09-03 08:18:24 -0300 |
| commit | a80aea64aa07361a57f2245a0695878f2ae67ee7 (patch) | |
| tree | 0722787782fad82ba34f267b8e6ab3a28ad8b833 /tools/perf | |
| parent | 56c62f52b6f25802a2154243b6dacdc6ff4f75bd (diff) | |
| download | linux-a80aea64aa07361a57f2245a0695878f2ae67ee7.tar.gz linux-a80aea64aa07361a57f2245a0695878f2ae67ee7.tar.xz | |
perf cs-etm: Show a warning for an unknown magic number
Currently perf reports "Cannot allocate memory" which isn't very helpful
for a potentially user facing issue. If we add a new magic number in
the future, perf will be able to report unrecognised magic numbers.
Reviewed-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: James Clark <james.clark@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https //lore.kernel.org/r/20210806134109.1182235-10-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/util/cs-etm.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c index 5b19b381688b..f323adb1af85 100644 --- a/tools/perf/util/cs-etm.c +++ b/tools/perf/util/cs-etm.c @@ -2981,6 +2981,11 @@ int cs_etm__process_auxtrace_info(union perf_event *event, /* ETE shares first part of metadata with ETMv4 */ trcidr_idx = CS_ETMV4_TRCTRACEIDR; + } else { + ui__error("CS ETM Trace: Unrecognised magic number %#"PRIx64". File could be from a newer version of perf.\n", + ptr[i]); + err = -EINVAL; + goto err_free_metadata; } if (!metadata[j]) { |