Re: get function names with lttng-ust-cyg-profile - Christophe Bédard via lttng-dev

From: "Christophe Bédard via lttng-dev" <lttng-dev@lists.lttng.org>
To: "Liu, Changcheng" <changcheng.liu@intel.com>
Cc: lttng-dev <lttng-dev@lists.lttng.org>
Subject: Re: get function names with lttng-ust-cyg-profile
Date: Fri, 26 Jun 2020 10:19:38 -0400	[thread overview]
Message-ID: <CAAS9dob7WzAXX+bqca24ELTbAHkMwQvmgmk_r5ci9FVpO4BQYw@mail.gmail.com> (raw)
In-Reply-To: <20200624014141.GA4166707@jerryopenix>

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Hi,

On Tue, 23 Jun 2020 at 21:45, Liu, Changcheng <changcheng.liu@intel.com>
wrote:

> Do you know how to print the call site function_name/offset?
> For example:
>             11     getchar();
>             12
>             13     x = add3(x);
> Currently, it only shows call_site address instead of function name with
> offset.
>
> func_entry: { cpu_id = 2 }, { ip = 0x55CFA4F5C1EE, debug_info = { bin =
> "instrument+0x11ee", func = "main+0", src = "instrument.c:7" }, vpid = 8523
> }, { addr = 0x55CFA4F5C1EE, call_site = 0x7F27C4B1E0B3 }
> func_entry: { cpu_id = 1 }, { ip = 0x55CFA4F5C1A9, debug_info = { bin =
> "instrument+0x11a9", func = "add3+0", src = "instrument.c:3" }, vpid = 8523
> }, { addr = 0x55CFA4F5C1A9, call_site = 0x55CFA4F5C237 }
> func_exit: { cpu_id = 1 }, { ip = 0x55CFA4F5C1A9, debug_info = { bin =
> "instrument+0x11a9", func = "add3+0", src = "instrument.c:3" }, vpid = 8523
> }, { addr = 0x55CFA4F5C1A9, call_site = 0x55CFA4F5C237 }
> func_exit: { cpu_id = 1 }, { ip = 0x55CFA4F5C1EE, debug_info = { bin =
> "instrument+0x11ee", func = "main+0", src = "instrument.c:7" }, vpid = 8523
> }, { addr = 0x55CFA4F5C1EE, call_site = 0x7F27C4B1E0B3 }
>

 Maybe I'm missing something, but isn't it right here? E.g.

debug_info = { bin = "instrument+0x11ee", func = "main+0", src =
> "instrument.c:7" }
>

Otherwise, I don't think babeltrace can provide any more information.

Christophe

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