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author | Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> | 2014-06-06 07:13:45 +0000 |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2014-06-09 12:15:07 -0300 |
commit | 36d789a4d75f3826faa6e75b018942b63ffed1a0 (patch) | |
tree | b0f3346d9f4bcc36e6d345d6c6314218ef901714 /tools | |
parent | a5c5009f72ced4b90f8715137784c0cd8b244544 (diff) | |
download | op-kernel-dev-36d789a4d75f3826faa6e75b018942b63ffed1a0.zip op-kernel-dev-36d789a4d75f3826faa6e75b018942b63ffed1a0.tar.gz |
perf probe: Improve error message for unknown member of data structure
Improve the error message if we can not find given member in the given
structure. Currently perf probe shows a wrong error message as below.
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# perf probe getname_flags:65 "result->BOGUS"
result(type:filename) has no member BOGUS.
Failed to find 'result' in this function.
Error: Failed to add events. (-22)
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The first message is correct, but the second one is not, since we didn't
fail to find a variable but fails to find the member of given variable.
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# perf probe getname_flags:65 "result->BOGUS"
result(type:filename) has no member BOGUS.
Error: Failed to add events. (-22)
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With this patch, the error message shows only the first one. And if we
really failed to find given variable, it tells us so.
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# perf probe getname_flags:65 "BOGUS"
Failed to find 'BOGUS' in this function.
Error: Failed to add events. (-2)
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Reported-by: Arnaldo Carvalho de Melo <acme@kernel.org>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20140606071345.6788.23744.stgit@kbuild-fedora.novalocal
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r-- | tools/perf/util/probe-finder.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c index 9d8eb26..ce8faf4 100644 --- a/tools/perf/util/probe-finder.c +++ b/tools/perf/util/probe-finder.c @@ -573,14 +573,13 @@ static int find_variable(Dwarf_Die *sc_die, struct probe_finder *pf) if (!die_find_variable_at(sc_die, pf->pvar->var, pf->addr, &vr_die)) { /* Search again in global variables */ if (!die_find_variable_at(&pf->cu_die, pf->pvar->var, 0, &vr_die)) + pr_warning("Failed to find '%s' in this function.\n", + pf->pvar->var); ret = -ENOENT; } if (ret >= 0) ret = convert_variable(&vr_die, pf); - if (ret < 0) - pr_warning("Failed to find '%s' in this function.\n", - pf->pvar->var); return ret; } |