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Fri, 4 Jun 2021 13:09:53 +0000 To: "lttng-dev@lists.lttng.org" Thread-Topic: LTTng 32 bits on 64 bits systems - kernel events... but no user-event Thread-Index: AQHXWTyXrFTi8gSpG0+XSeNSyXv/wA== Date: Fri, 4 Jun 2021 13:09:53 +0000 Message-ID: Accept-Language: fr-FR, en-US Content-Language: fr-FR X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [165.225.20.117] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 9529271d-4df5-4049-cac5-08d9275a0b2a x-ms-traffictypediagnostic: PR3PR02MB6027: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:6108; x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: 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 x-forefront-antispam-report: CIP:255.255.255.255; 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boundary="===============3877669247970736445==" Errors-To: lttng-dev-bounces@lists.lttng.org Sender: "lttng-dev" --===============3877669247970736445== Content-Language: fr-FR Content-Type: multipart/alternative; boundary="_000_PR3PR02MB6202F326FC88DD8F3EF90596D13B9PR3PR02MB6202eurp_" --_000_PR3PR02MB6202F326FC88DD8F3EF90596D13B9PR3PR02MB6202eurp_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi LTTng team, I am currently trying to add lttng 32bits on a 64bits system with a custom = kernel 4.19.177+ x86_64 (Debian 10.9) My former attempt only with only a 100% arm32 bits was successful (raspberr= y). I am facing now a strange issue : I can record kernel event but not userspa= ce event... but I can see these user-event (see below)! (tuto : https://lttng.org/docs/#doc-instrumenting-32-bit-app-on-64-bit-syst= em) I followed two times the tutorial : on lttng 2.12 and lttng 2.10. I am on lttng (LTTng Trace Control) 2.10.11 - KeKriek now All installation seemed to install without any error. The only thing I added is at the very end where I did a : ln -s /usr/local/= bin/lttng /usr/bin/lttng (to directly call commands like "lttng start") Here some interesting outputs, I am using this projet as an example : https= ://lttng.org/docs/#doc-tracing-your-own-user-application lttng list -u : OK Ubuntu Pastebin LTTNG_UST_DEBUG=3D1 ./hello : seems OK : Ubuntu Pastebin kernel-event output : Ubuntu Pastebin user-event ouput : none - the output folder stated with lttng create my-use= r-session --output=3D/tmp/my-user-session doesn't even appear apt-file search lttng : Ubuntu Pastebin lsmod | grep lttng : Ubuntu Pastebin Note : file /usr/local/bin/lttng (the exe I am using) gives : /usr/local/bin/lttng: ELF 64-bit LSB pie executable, x86-64, version 1 (SYS= V), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Li= nux 3.2.0, BuildID[sha1]=3D542a108c40e386c17027c2c8f8fcb30e278b7748, with d= ebug_info, not stripped I am wondering if the installation didn't pick a 64bits RCU and analyses pr= ogramms only on this. However, I have currently absolutely no idea how to debug this. Could you advise me some methods ? Regards, --_000_PR3PR02MB6202F326FC88DD8F3EF90596D13B9PR3PR02MB6202eurp_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi LTTng team,

I am currently trying to add lttng 32bits on a 64bits system with a custom = kernel 4.19.177+ x86_64 (Debian 10.9)
My former attempt only with only a 100% arm32 bits was successful (raspberr= y).
I am facing now a strange issue : I can record kernel event but not userspa= ce event... but I can see these user-event (see below)!

I followed two times the tutorial : on lttng 2.12 and lttng 2.10. = ;
I am on lttng (LTTng Trace Control) 2.10.11 - KeKriek now
All installation seemed to install without any error.
The only thing I added is at the very end where I did a : ln -s /usr/l= ocal/bin/lttng /usr/bin/lttng (to directly call commands like "lttng s= tart")

Here some interesting outputs, I am using this projet as an example :&= nbsp;https://lttng.org/docs/#doc-tracing-your-own-user-ap= plication
lttng list -u : OK Ubuntu Pastebin
LTTNG_UST_DEBUG=3D1 ./hello : seems OK : Ubuntu Pastebin
kernel-event output : Ubuntu Pastebin
user-event ouput : none - the output folder stated with lttng cre= ate my-user-session --output=3D/tmp/my-user-session doesn't even appear
apt-file search lttng : Ubuntu Pastebin
lsmod | grep lttng : Ubuntu Pastebin


Note : file /usr/local/bin/lttng (the exe I am using) gives :
/usr/local/bin/lttng: ELF 64-bit LSB pie executable, x86-64, version 1= (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for G= NU/Linux 3.2.0, BuildID[sha1]=3D542a108c40e386c17027c2c8f8fcb30e278b7748, w= ith debug_info, not stripped

I am wondering if the installation didn't pick a 64bits RCU and analys= es programms only on this.
However, I have currently absolutely no idea how to debug this.

Could you advise me some methods ?

Regards,
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