On Wed, Jul 10, 2024 at 9:53 PM Brian Hutchinson
wrote:
> Hi,
>
> I'm getting a weird segfault when I compile in a lttng-ust tracepoint into
> my application.
>
> I'm able to run the lttng-ust hello_world example just fine on my platform
> which one would think s
Hi Kienan,
On Thu, Jul 11, 2024 at 8:38 AM Kienan Stewart
wrote:
> Hi Brian,
>
> On 7/11/24 8:33 AM, Brian Hutchinson via lttng-dev wrote:
> > ...
> >
> > I'm not sure about this, still trying to comprehend everything, but I
> > think my issue coul
not portable!
CC app_ust_indirect_abi0_abi1-app_ust.o
CC app_ust_indirect_abi0_abi1-tp.o
CCLD app_ust_indirect_abi0_abi1
*** Warning: Linking the executable app_ust_indirect_abi0_abi1 against
the loadable module
*** libzero.so is not portable!
I don't know if these are ok
On Mon, Jul 29, 2024 at 3:03 PM Kienan Stewart wrote:
>
> Hi Brian,
>
> On 7/25/24 3:54 PM, Brian Hutchinson wrote:
> > Hi Kienan,
> >
> > I'll answer your questions below, but I've got questions on what I saw
> > building and installing lttng-tools (
quot;make check" that I don't know if they are "good" or
"bad" but could be related???
Anyway, attaching a tar of lttng-ust and lttng-tools "make check" for
your enjoyment.
Regards,
Brian
On Tue, Jul 30, 2024 at 8:40 AM Brian Hutchinson wrote:
&g
e=gnu
--enable-linker-build-id --with-ppl=no --with-cloog=no
--enable-checking=release --enable-cheaders=c_global --without-isl
--with-build-sysroot=/ --disable-static --enable-nls -
-with-glibc-version=2.28 --enable-initfini-array --enable-__cxa_atexit
Thread model: posix
Regards,
Brian
On Tue,
hello.o hello-tp.o -llttng-ust -ldl
I know ... you're gonna say don't do that, but this is embedded and
millions of lines of code so it is what it is.
Regards,
Brian
On Tue, Jul 30, 2024 at 11:58 AM Kienan Stewart wrote:
>
> Hi Brian,
>
> On 7/30/24 11:54 AM, Brian Hutchinso
So instructions for tracef just say to link in lttng-ust, not dl, I didn't
use liblttng-ust.a so maybe I misspoke.
https://lttng.org/docs/v2.11/#doc-tracef
... so that's what I did.
When I compile in a tracepoint with trace provider, I link in lttng-ust and
dl. I'm assuming you can mix both tra
at
../../../../lttng-tools-2.11.5/src/bin/lttng-sessiond/client.c:659)
Not quite sure what to do about that.
Regards,
Brian
On Tue, Apr 25, 2023 at 12:56 AM Brian Hutchinson
wrote:
> So instructions for tracef just say to link in lttng-ust, not dl, I didn't
> use liblttng-ust.a
Hi,
I posted a while ago (thread - Using lttng 2.11 and UST doesn't appear
to work - getting empty trace files) about this problem I'm having
with getting empty trace logs.
I've since upgraded to lttng v2.13 and while I can do a simple hello
world program with tracef and get events in the log fil
... more background. I've always used ltt in the kernel so I don't
have much experience with the user side of it and especially
multi-threaded, multi-core so I'm probably missing some fundamental
concepts that I need to understand.
Regards,
Brian
On Thu, May 11, 2023 at
Hi Mathieu,
On Thu, May 11, 2023 at 2:12 PM Mathieu Desnoyers
wrote:
>
> On 2023-05-11 12:36, Brian Hutchinson via lttng-dev wrote:
> > ... more background. I've always used ltt in the kernel so I don't
> > have much experience with the user side of it and especial
On Thu, May 11, 2023 at 2:14 PM Michael Jeanson wrote:
>
> On 2023-05-11 12:36, Brian Hutchinson via lttng-dev wrote:
> > ... more background. I've always used ltt in the kernel so I don't
> > have much experience with the user side of it and especially
> >
On Thu, May 11, 2023 at 12:36 PM Brian Hutchinson wrote:
>
> ... more background. I've always used ltt in the kernel so I don't
> have much experience with the user side of it and especially
> multi-threaded, multi-core so I'm probably missing some fundamenta
Hi Mathieu,
On Fri, May 12, 2023 at 9:33 AM Mathieu Desnoyers
wrote:
>
> On 2023-05-12 00:10, Brian Hutchinson wrote:
> > Hmm, I missed this earlier somehow.
> >
> > So, I'm not the greatest at updating OE and Yocto recipes. I'm
> > currently using this
Hi,
I'm trying to figure out how to use uprobes with lttng.
I can't use a normal uprobe for a line number just using the address I
want to probe obtained from objdump? As in:
echo 'p /usr/local/bin/my_app:0x2c3a8' >>
/sys/kernel/debug/tracing/uprobe_events
... which isn't a function entry, it'
On Wed, May 17, 2023 at 12:08 PM Mathieu Desnoyers
wrote:
>
> On 2023-05-16 22:11, Brian Hutchinson via lttng-dev wrote:
> > Hi,
> >
> > I'm trying to figure out how to use uprobes with lttng.
> >
> > I can't use a normal uprobe for a line num
On Wed, May 17, 2023 at 12:08 PM Mathieu Desnoyers
wrote:
>
> On 2023-05-16 22:11, Brian Hutchinson via lttng-dev wrote:
> > Hi,
> >
> > I'm trying to figure out how to use uprobes with lttng.
> >
> > I can't use a normal uprobe for a line num
On Thu, May 18, 2023 at 9:17 AM Brian Hutchinson wrote:
>
> On Wed, May 17, 2023 at 12:08 PM Mathieu Desnoyers
> wrote:
> >
> > On 2023-05-16 22:11, Brian Hutchinson via lttng-dev wrote:
> > > Hi,
> > >
> > > I'm trying to figure out how
On Thu, May 18, 2023 at 10:45 AM Mathieu Desnoyers
wrote:
>
> On 2023-05-18 10:10, Brian Hutchinson wrote:
> [...]
> > I updated my hello world to have a function I'd like to use the
> > --userspace-probe method on with the very original name of
> > &#
On Thu, May 18, 2023 at 11:00 AM Brian Hutchinson wrote:
>
> On Thu, May 18, 2023 at 10:45 AM Mathieu Desnoyers
> wrote:
> >
> > On 2023-05-18 10:10, Brian Hutchinson wrote:
> > [...]
> > > I updated my hello world to have a function I'd like to use the
&
On Thu, May 18, 2023 at 3:03 PM Mathieu Desnoyers
wrote:
>
> On 2023-05-18 14:58, Brian Hutchinson wrote:
> > On Thu, May 18, 2023 at 11:00 AM Brian Hutchinson
> > wrote:
> >>
> >> On Thu, May 18, 2023 at 10:45 AM Mathieu Desnoyers
> >> wrote:
>
On Thu, May 18, 2023 at 3:07 PM Brian Hutchinson wrote:
>
> On Thu, May 18, 2023 at 3:03 PM Mathieu Desnoyers
> wrote:
> >
> > On 2023-05-18 14:58, Brian Hutchinson wrote:
> > > On Thu, May 18, 2023 at 11:00 AM Brian Hutchinson
> > > wrote:
> &g
On Thu, May 18, 2023 at 3:16 PM Mathieu Desnoyers
wrote:
>
> On 2023-05-18 15:07, Brian Hutchinson wrote:
>
> [...]
>
> >>
> >> If you attach to an ELF symbol (function), then there is no USDT in
> >> play, so it should not be related to the issue you
On Thu, May 18, 2023 at 3:24 PM Mathieu Desnoyers
wrote:
>
> On 2023-05-18 15:20, Brian Hutchinson wrote:
> > On Thu, May 18, 2023 at 3:07 PM Brian Hutchinson
> > wrote:
> >>
> >> On Thu, May 18, 2023 at 3:03 PM Mathieu Desnoyers
> >> wrote:
>
On Thu, May 11, 2023 at 2:14 PM Mathieu Desnoyers
wrote:
>
> On 2023-05-11 14:13, Mathieu Desnoyers via lttng-dev wrote:
> > On 2023-05-11 12:36, Brian Hutchinson via lttng-dev wrote:
> >> ... more background. I've always used ltt in the kernel so I don't
> >
On Wed, Jun 21, 2023 at 4:21 PM Mathieu Desnoyers
wrote:
>
> On 6/20/23 18:02, Brian Hutchinson wrote:
> > On Thu, May 11, 2023 at 2:14 PM Mathieu Desnoyers
> > wrote:
> >>
> >> On 2023-05-11 14:13, Mathieu Desnoyers via lttng-dev wrote:
> >>> On
On Wed, Jun 21, 2023 at 6:02 PM Brian Hutchinson wrote:
>
> On Wed, Jun 21, 2023 at 4:21 PM Mathieu Desnoyers
> wrote:
> >
> > On 6/20/23 18:02, Brian Hutchinson wrote:
> > > On Thu, May 11, 2023 at 2:14 PM Mathieu Desnoyers
> > > wrote:
> > >>
Hi,
I'm getting a weird segfault when I compile in a lttng-ust tracepoint into
my application.
I'm able to run the lttng-ust hello_world example just fine on my platform
which one would think should prove everything out, but when I use the exact
same hello world trace provider and link it into my
./my-app
Typical use cases include closing all the file descriptors after fork(2)
<https://man7.org/linux/man-pages/man2/fork.2.html> or rfork(2)
<http://www.freebsd.org/cgi/man.cgi?query=rfork&sektion=2&manpath=FreeBSD+4.10-RELEASE>
and buggy applications doing “double closes”.
Thanks
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