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    Subject[PATCH 06/16] perf tools: Fix dwarf unwind max_stack processing
    Date
    The 'unwind__get_entries' function currently returns
    'max_stack + 1' entries (instead of exact max_stack
    entries), because max_stack value does not get
    decremented for the first entry.

    This fix makes dwarf-unwind test pass.

    Signed-off-by: Jiri Olsa <jolsa@redhat.com>
    Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
    Cc: Frederic Weisbecker <fweisbec@gmail.com>
    Cc: Ingo Molnar <mingo@kernel.org>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
    Cc: David Ahern <dsahern@gmail.com>
    Cc: Jean Pihet <jean.pihet@linaro.org>
    ---
    tools/perf/util/unwind.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/tools/perf/util/unwind.c b/tools/perf/util/unwind.c
    index 0efd539..87509d8 100644
    --- a/tools/perf/util/unwind.c
    +++ b/tools/perf/util/unwind.c
    @@ -611,5 +611,5 @@ int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
    if (ret)
    return -ENOMEM;

    - return get_entries(&ui, cb, arg, max_stack);
    + return --max_stack > 0 ? get_entries(&ui, cb, arg, max_stack) : 0;
    }
    --
    1.8.3.1


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