Hi,
I did the same thing a while ago, i.e., trigger tracepoints on
malloc/free/etc. using liblttng-ust-libc-wrapper and collect userspace
callstack information (so that the indirect calls to malloc/free can be
removed from an application).
There is a userspace callstack context implementation her
Hi,
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Christophe
On T
Hi,
On Tue, 23 Jun 2020 at 21:45, Liu, Changcheng
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
> o
Hi,
Babeltrace is doing exactly what it should as far as I know.
>
yes, but babeltrace *can* provide the information if:
* ip and vpid contexts are enabled (for userspace), e.g.
$ lttng add-context --userspace --type=ip --type=vpid
* LTTng state dump events are enabled, e.g.
$ lttng enable-ev
On Wed, 13 May 2020 at 10:18, Genevieve Bastien via lttng-dev <
lttng-dev@lists.lttng.org> wrote:
> We had a very very experimental branch with it, using backtrace first,
> then unwind. But it is not suggested, not performant. It's far from the
> correct desired implementation, for which Mathieu c
On Tue, 12 May 2020 at 08:27, Mathieu Desnoyers <
mathieu.desnoy...@efficios.com> wrote:
> How does your test program issue the system call ? Is it directly with
> syscall() (see syscall(2) man page), or
> does it call into libc ? Is your entire libc compiled with
> -fno-omit-frame-pointer ?
>
In
Hi,
As part of a big software safety certification effort, we are looking into
making sure that some functions of our API do not allocate memory and do
not use any blocking syscalls.
This part is done and is working (using kmem_mm_page_{alloc,free} for
memory allocations for now). However, if we
Hi,
On Mon, 29 Jul 2019 at 21:23, Jonathan Rajotte-Julien <
jonathan.rajotte-jul...@efficios.com> wrote:
> Hi,
>
> For those at home wondering why this would be relevant to lttng,
> lttng-ust comes with a utility shared object allowing you to leverage the
> -finstrument-function sites to hook ltt
Hi,
Sharing this just in case it can help someone!
gcc only lets you disable instrumentation, using the
`no_instrument_function` attribute, or by matching file names. It does not
let you explicitly choose the individual functions you want to instrument.
I've searched many times for a way to do i
Hi,
Re-sending since I previously used an email address not subscribed to the
ML.
On Mon, 29 Jul 2019 at 11:08, Ravindra Kumar Meena
wrote:
> Okay. The above link was somewhat helpful but I still didn't get what is
> the meaning of {0, 1, 1026, 4096} values in _prev_state.
>
> In babeltrace out
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