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perf hists: Reimplement hists__has_callchains()

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There are places where we have only access to struct hists and need to
know if any of its hist_entries has callchains, like when drawing
headers for the various output modes (stdio, TUI, etc), so, when adding
a new hist_entry, check if it has callchains, storing this info for
later use by hists__has_callchains().

This reimplementation is necessary because not always a 'struct hists'
is allocated together with a 'struct perf evsel', so we can't go from
'hists' to 'perf_event_attr.sample_type & PERF_SAMPLE_CALLCHAIN'.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-hg5g7yddjio3ljwyqnnaj5dt@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo
2018-06-07 14:42:27 -03:00
parent 29f9fcdd3f
commit c9d3662870
2 changed files with 6 additions and 4 deletions
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6
tools/perf/util/hist.c
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@@ -621,9 +621,11 @@ __hists__add_entry(struct hists *hists,
.raw_data = sample->raw_data,
.raw_size = sample->raw_size,
.ops = ops,
};
}, *he = hists__findnew_entry(hists, &entry, al, sample_self);
return hists__findnew_entry(hists, &entry, al, sample_self);
if (!hists->has_callchains && he && he->callchain_size != 0)
hists->has_callchains = true;
return he;
}
struct hist_entry *hists__add_entry(struct hists *hists,