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perf cs-etm: Add warnings for missing DSOs

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Currently decode will silently fail if no binary data is available for
the decode. This is made worse if only partial data is available because
the decode will appear to work, but any trace from that missing DSO will
silently not be generated.

Add a UI popup once if there is any data missing, and then warn in the
bottom left for each individual DSO that's missing.

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: http //lore.kernel.org/lkml/20210805130354.878120-2-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
James Clark 2021-08-05 14:03:54 +01:00 committed by Arnaldo Carvalho de Melo
parent b6ac16eed3
commit 9c38b671eb
1 changed files with 10 additions and 1 deletions

11
tools/perf/util/cs-etm.c

@ -716,8 +716,17 @@ static u32 cs_etm__mem_access(struct cs_etm_queue *etmq, u8 trace_chan_id,
len = dso__data_read_offset(al.map->dso, machine, offset, buffer, size);
if (len <= 0)
if (len <= 0) {
ui__warning_once("CS ETM Trace: Missing DSO. Use 'perf archive' or debuginfod to export data from the traced system.\n"
" Enable CONFIG_PROC_KCORE or use option '-k /path/to/vmlinux' for kernel symbols.\n");
if (!al.map->dso->auxtrace_warned) {
pr_err("CS ETM Trace: Debug data not found for address %#"PRIx64" in %s\n",
address,
al.map->dso->long_name ? al.map->dso->long_name : "Unknown");
al.map->dso->auxtrace_warned = true;
}
return 0;
}
return len;
}