• Arnaldo Carvalho de Melo's avatar
    perf hists: Reimplement hists__has_callchains() · c9d36628
    Arnaldo Carvalho de Melo authored
    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.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    c9d36628
hist.c 62.2 KB