From mboxrd@z Thu Jan  1 00:00:00 1970
From: chid1989@gmail.com (Chidhu R)
Date: Wed, 10 Jun 2015 14:16:53 -0700
Subject: [lttng-dev] Printing bit fields with LTTng
Message-ID: <CAL1ZhON=nEPuoXks2AKq4k7nCpK_W_FQ96TM3299V69V6RgW_w@mail.gmail.com>

Hello,

I am getting compilation issues while trying to print bit field values with
LTTng.

Error:

hello.c: In function ?main?:
hello.c:36:1: error: ?typeof? applied to a bit-field
hello.c:36:1: error: ?typeof? applied to a bit-field
hello.c:36:1: error: ?typeof? applied to a bit-field
hello.c:36:1: error: ?sizeof? applied to a bit-field

Snippet:

struct abc{
        int a:16;
        int b:8;
};

Line 36: tracepoint(hello_world, my_third_tracepoint, aa.a, "welcome");
Line 37: printf("val = %x\n",aa.a);

tracepoint line results in compilation error.
printf succeeds.

Tp definition looks like this.

TRACEPOINT_EVENT(
    hello_world,
    my_third_tracepoint,
    TP_ARGS(
        uint32_t, arg,
        const char * , my_string_arg
    ),
    TP_FIELDS(
        ctf_integer_hex(uint32_t, my_arg, arg)
        ctf_string(field, my_string_arg)
    )
)

How to print bit field values?

Thanks
Chid
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