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    Subject[PATCH 12/15] parse-events: Support '+' opcode in print format
    Date
    From: Vaibhav Nagarnaik <vnagarnaik@google.com>

    The '+' opcode is not supported in the arguments for the print format.
    This patch adds support for it.

    Cc: Michael Rubin <mrubin@google.com>
    Cc: David Sharp <dhsharp@google.com>
    Signed-off-by: Vaibhav Nagarnaik <vnagarnaik@google.com>
    Link: http://lkml.kernel.org/r/1310785241-3799-4-git-send-email-vnagarnaik@google.com
    Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
    Cc: Ingo Molnar <mingo@kernel.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
    Cc: Steven Rostedt <rostedt@goodmis.org>
    Cc: Borislav Petkov <bp@alien8.de>
    Cc: Jiri Olsa <jolsa@redhat.com>
    Cc: Arun Sharma <asharma@fb.com>
    Cc: Namhyung Kim <namhyung.kim@lge.com>
    Cc: David Ahern <dsahern@gmail.com>
    Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
    ---
    tools/lib/traceevent/event-parse.c | 12 ++++++++++++
    1 files changed, 12 insertions(+), 0 deletions(-)

    diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
    index 4d5092f..476626a 100644
    --- a/tools/lib/traceevent/event-parse.c
    +++ b/tools/lib/traceevent/event-parse.c
    @@ -2047,6 +2047,18 @@ static int arg_num_eval(struct print_arg *arg, long long *val)
    break;
    *val = left - right;
    break;
    + case '+':
    + if (arg->op.left->type == PRINT_NULL)
    + left = 0;
    + else
    + ret = arg_num_eval(arg->op.left, &left);
    + if (!ret)
    + break;
    + ret = arg_num_eval(arg->op.right, &right);
    + if (!ret)
    + break;
    + *val = left + right;
    + break;
    default:
    do_warning("unknown op '%s'", arg->op.op);
    ret = 0;
    --
    1.7.5.4


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