From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Khouzam via lttng-dev Subject: Re: get function names with lttng-ust-cyg-profile Date: Tue, 23 Jun 2020 15:12:10 +0000 Message-ID: References: <20200623143758.GB4160129@jerryopenix> Reply-To: Matthew Khouzam Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0359904280060498912==" Return-path: Received: from NAM10-BN7-obe.outbound.protection.outlook.com (mail-bn7nam10on2051.outbound.protection.outlook.com [40.107.92.51]) by lists.lttng.org (Postfix) with ESMTPS id 49rqWc0dgzz1368 for ; Tue, 23 Jun 2020 11:12:11 -0400 (EDT) In-Reply-To: <20200623143758.GB4160129@jerryopenix> Content-Language: en-US List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: lttng-dev-bounces@lists.lttng.org Sender: "lttng-dev" To: "lttng-dev@lists.lttng.org" , "Liu, Changcheng" List-Id: lttng-dev@lists.lttng.org --===============0359904280060498912== Content-Language: en-US Content-Type: multipart/alternative; boundary="_000_SA0PR15MB38396A864018025F971F2A239E940SA0PR15MB3839namp_" --_000_SA0PR15MB38396A864018025F971F2A239E940SA0PR15MB3839namp_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi, You have the pointers that are traced. Babeltrace is doing exactly what it = should as far as I know. You could use the command 'nm' to get your symbols and look them up. I am s= ure Babeltrace can do this from a python level. You could also use a GUI ba= sed trace viewer to get the information. Hope that helps. Matthew ________________________________ From: lttng-dev on behalf of Liu, Chang= cheng via lttng-dev Sent: Tuesday, June 23, 2020 10:37 AM To: lttng-dev@lists.lttng.org Cc: changcheng.liu@intel.com Subject: [lttng-dev] get function names with lttng-ust-cyg-profile Hi all, I'm trying to use lttng-ust-cyg-profile to trace program. Does anyone know how to get function names and offset through lttng-ust-= cyg-profile? In below example, the babeltrace could only get the function entry/exit = value. 1. Source program: instrument.c 1 #include 2 3 int add3(int val) { 4 return val + 3; 5 } 6 7 int main(int argc, char **argv) { 8 int x =3D 4; 9 10 puts("Press Enter to continue..."); 11 getchar(); 12 13 x =3D add3(x); 14 15 return 0; 16 } 2. build source code: $ gcc -g -finstrument-functions instrument.c -o instrument 3. run program: $ LD_PRELOAD=3D/usr/lib/x86_64-linux-gnu/liblttng-ust-cyg-profile.so= ./instrument 4. start trace process: trace@trace:~/cc$ sudo lttng create instrument Session instrument created. Traces will be output to /root/lttng-traces/instrument-20200623-2229= 17 trace@trace:~/cc$ sudo lttng enable-channel user_func_trace --usersp= ace UST channel user_func_trace enabled for session instrument trace@trace:~/cc$ sudo lttng enable-event --userspace lttng_ust_cyg_= profile:func_entry --channel user_func_trace UST event lttng_ust_cyg_profile:func_entry created in channel user_f= unc_trace trace@trace:~/cc$ sudo lttng enable-event --userspace lttng_ust_cyg_= profile:func_exit --channel user_func_trace UST event lttng_ust_cyg_profile:func_exit created in channel user_fu= nc_trace trace@trace:~/cc$ sudo lttng start Tracing started for session instrument trace@trace:~/cc$ sudo lttng destroy Destroying session instrument.. Session instrument destroyed trace@trace:~/cc$ sudo babeltrace /root/lttng-traces/instrument-2020= 0623-222917 [22:29:55.388607059] (+?.?????????) trace lttng_ust_cyg_profile:func= _entry: { cpu_id =3D 2 }, { addr =3D 0x5625C88B01A9, call_site =3D 0x5625C8= 8B0237 } [22:29:55.388612293] (+0.000005234) trace lttng_ust_cyg_profile:func= _exit: { cpu_id =3D 2 }, { addr =3D 0x5625C88B01A9, call_site =3D 0x5625C88= B0237 } [22:29:55.388613215] (+0.000000922) trace lttng_ust_cyg_profile:func= _exit: { cpu_id =3D 2 }, { addr =3D 0x5625C88B01EE, call_site =3D 0x7FE40BD= 5C0B3 } B.R. Changcheng _______________________________________________ lttng-dev mailing list lttng-dev@lists.lttng.org https://protect2.fireeye.com/v1/url?k=3D98478753-c6e73d3d-9847c7c8-869a14f4= b08c-41638b2508ab85dd&q=3D1&e=3D703483a0-63a9-4269-ac8e-c1fc5a57edad&u=3Dht= tps%3A%2F%2Flists.lttng.org%2Fcgi-bin%2Fmailman%2Flistinfo%2Flttng-dev --_000_SA0PR15MB38396A864018025F971F2A239E940SA0PR15MB3839namp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
Hi,

You have the pointers that are traced. Babeltrace is doing exactly what it = should as far as I know.

You could use the command 'nm' to get your symbols and look them up. I am s= ure Babeltrace can do this from a python level. You could also use a GUI ba= sed trace viewer to get the information. 

Hope that helps.
Matthew
From: lttng-dev <lttng-d= ev-bounces@lists.lttng.org> on behalf of Liu, Changcheng via lttng-dev &= lt;lttng-dev@lists.lttng.org>
Sent: Tuesday, June 23, 2020 10:37 AM
To: lttng-dev@lists.lttng.org <lttng-dev@lists.lttng.org>
Cc: changcheng.liu@intel.com <changcheng.liu@intel.com>
Subject: [lttng-dev] get function names with lttng-ust-cyg-profile
 
Hi all,
   I'm trying to use lttng-ust-cyg-profile to trace program.
   Does anyone know how to get function names and offset through = lttng-ust-cyg-profile?

   In below example, the babeltrace could only get the function e= ntry/exit value.
   1. Source program: instrument.c
         1 #include <stdio.h>=
         2
         3 int add3(int val) {
         4    &= nbsp;    return val + 3;
         5 }
         6
         7 int main(int argc, char = **argv) {
         8     = int x =3D 4;
         9     =
        10     puts(= "Press Enter to continue...");
        11     getch= ar();
        12    
        13     x =3D= add3(x);
        14    
        15     retur= n 0;
        16 }

   2. build source code:
        $ gcc -g -finstrument-functions = instrument.c -o instrument

   3. run program:
       $ LD_PRELOAD=3D/usr/lib/x86_64-linux-g= nu/liblttng-ust-cyg-profile.so ./instrument

   4. start trace process:
       trace@trace:~/cc$ sudo lttng create in= strument
       Session instrument created.
       Traces will be output to /root/lttng-t= races/instrument-20200623-222917

       trace@trace:~/cc$ sudo lttng enable-ch= annel user_func_trace --userspace
       UST channel user_func_trace enabled fo= r session instrument

       trace@trace:~/cc$ sudo lttng enable-ev= ent --userspace lttng_ust_cyg_profile:func_entry --channel user_func_trace<= br>        UST event lttng_ust_cyg_profile:func_e= ntry created in channel user_func_trace
       trace@trace:~/cc$ sudo lttng enable-ev= ent --userspace lttng_ust_cyg_profile:func_exit --channel user_func_trace        UST event lttng_ust_cyg_profile:func_e= xit created in channel user_func_trace

       trace@trace:~/cc$ sudo lttng start
       Tracing started for session instrument=

       trace@trace:~/cc$ sudo lttng destroy        Destroying session instrument..
       Session instrument destroyed

       trace@trace:~/cc$ sudo babeltrace /roo= t/lttng-traces/instrument-20200623-222917
       [22:29:55.388607059] (+?.?????????= ) trace lttng_ust_cyg_profile:func_entry: { cpu_id =3D 2 }, { addr =3D 0x56= 25C88B01A9, call_site =3D 0x5625C88B0237 }
       [22:29:55.388612293] (+0.000005234= ) trace lttng_ust_cyg_profile:func_exit: { cpu_id =3D 2 }, { addr =3D 0x562= 5C88B01A9, call_site =3D 0x5625C88B0237 }
       [22:29:55.388613215] (+0.000000922= ) trace lttng_ust_cyg_profile:func_exit: { cpu_id =3D 2 }, { addr =3D 0x562= 5C88B01EE, call_site =3D 0x7FE40BD5C0B3 }

B.R.
Changcheng
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lttng-dev mailing list
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boundary="===============0359904280060498912==" Errors-To: lttng-dev-bounces@lists.lttng.org Sender: "lttng-dev" Message-ID: <20200623151210.ANWwIWQvOWm-TNx0OHSy3az7eBpM7sUOTbI2-4dTYU8@z> --===============0359904280060498912== Content-Language: en-US Content-Type: multipart/alternative; boundary="_000_SA0PR15MB38396A864018025F971F2A239E940SA0PR15MB3839namp_" --_000_SA0PR15MB38396A864018025F971F2A239E940SA0PR15MB3839namp_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi, You have the pointers that are traced. Babeltrace is doing exactly what it = should as far as I know. You could use the command 'nm' to get your symbols and look them up. I am s= ure Babeltrace can do this from a python level. You could also use a GUI ba= sed trace viewer to get the information. Hope that helps. Matthew ________________________________ From: lttng-dev on behalf of Liu, Chang= cheng via lttng-dev Sent: Tuesday, June 23, 2020 10:37 AM To: lttng-dev@lists.lttng.org Cc: changcheng.liu@intel.com Subject: [lttng-dev] get function names with lttng-ust-cyg-profile Hi all, I'm trying to use lttng-ust-cyg-profile to trace program. Does anyone know how to get function names and offset through lttng-ust-= cyg-profile? In below example, the babeltrace could only get the function entry/exit = value. 1. Source program: instrument.c 1 #include 2 3 int add3(int val) { 4 return val + 3; 5 } 6 7 int main(int argc, char **argv) { 8 int x =3D 4; 9 10 puts("Press Enter to continue..."); 11 getchar(); 12 13 x =3D add3(x); 14 15 return 0; 16 } 2. build source code: $ gcc -g -finstrument-functions instrument.c -o instrument 3. run program: $ LD_PRELOAD=3D/usr/lib/x86_64-linux-gnu/liblttng-ust-cyg-profile.so= ./instrument 4. start trace process: trace@trace:~/cc$ sudo lttng create instrument Session instrument created. Traces will be output to /root/lttng-traces/instrument-20200623-2229= 17 trace@trace:~/cc$ sudo lttng enable-channel user_func_trace --usersp= ace UST channel user_func_trace enabled for session instrument trace@trace:~/cc$ sudo lttng enable-event --userspace lttng_ust_cyg_= profile:func_entry --channel user_func_trace UST event lttng_ust_cyg_profile:func_entry created in channel user_f= unc_trace trace@trace:~/cc$ sudo lttng enable-event --userspace lttng_ust_cyg_= profile:func_exit --channel user_func_trace UST event lttng_ust_cyg_profile:func_exit created in channel user_fu= nc_trace trace@trace:~/cc$ sudo lttng start Tracing started for session instrument trace@trace:~/cc$ sudo lttng destroy Destroying session instrument.. Session instrument destroyed trace@trace:~/cc$ sudo babeltrace /root/lttng-traces/instrument-2020= 0623-222917 [22:29:55.388607059] (+?.?????????) trace lttng_ust_cyg_profile:func= _entry: { cpu_id =3D 2 }, { addr =3D 0x5625C88B01A9, call_site =3D 0x5625C8= 8B0237 } [22:29:55.388612293] (+0.000005234) trace lttng_ust_cyg_profile:func= _exit: { cpu_id =3D 2 }, { addr =3D 0x5625C88B01A9, call_site =3D 0x5625C88= B0237 } [22:29:55.388613215] (+0.000000922) trace lttng_ust_cyg_profile:func= _exit: { cpu_id =3D 2 }, { addr =3D 0x5625C88B01EE, call_site =3D 0x7FE40BD= 5C0B3 } B.R. Changcheng _______________________________________________ lttng-dev mailing list lttng-dev@lists.lttng.org https://protect2.fireeye.com/v1/url?k=3D98478753-c6e73d3d-9847c7c8-869a14f4= b08c-41638b2508ab85dd&q=3D1&e=3D703483a0-63a9-4269-ac8e-c1fc5a57edad&u=3Dht= tps%3A%2F%2Flists.lttng.org%2Fcgi-bin%2Fmailman%2Flistinfo%2Flttng-dev --_000_SA0PR15MB38396A864018025F971F2A239E940SA0PR15MB3839namp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
Hi,

You have the pointers that are traced. Babeltrace is doing exactly what it = should as far as I know.

You could use the command 'nm' to get your symbols and look them up. I am s= ure Babeltrace can do this from a python level. You could also use a GUI ba= sed trace viewer to get the information. 

Hope that helps.
Matthew
From: lttng-dev <lttng-d= ev-bounces@lists.lttng.org> on behalf of Liu, Changcheng via lttng-dev &= lt;lttng-dev@lists.lttng.org>
Sent: Tuesday, June 23, 2020 10:37 AM
To: lttng-dev@lists.lttng.org <lttng-dev@lists.lttng.org>
Cc: changcheng.liu@intel.com <changcheng.liu@intel.com>
Subject: [lttng-dev] get function names with lttng-ust-cyg-profile
 
Hi all,
   I'm trying to use lttng-ust-cyg-profile to trace program.
   Does anyone know how to get function names and offset through = lttng-ust-cyg-profile?

   In below example, the babeltrace could only get the function e= ntry/exit value.
   1. Source program: instrument.c
         1 #include <stdio.h>=
         2
         3 int add3(int val) {
         4    &= nbsp;    return val + 3;
         5 }
         6
         7 int main(int argc, char = **argv) {
         8     = int x =3D 4;
         9     =
        10     puts(= "Press Enter to continue...");
        11     getch= ar();
        12    
        13     x =3D= add3(x);
        14    
        15     retur= n 0;
        16 }

   2. build source code:
        $ gcc -g -finstrument-functions = instrument.c -o instrument

   3. run program:
       $ LD_PRELOAD=3D/usr/lib/x86_64-linux-g= nu/liblttng-ust-cyg-profile.so ./instrument

   4. start trace process:
       trace@trace:~/cc$ sudo lttng create in= strument
       Session instrument created.
       Traces will be output to /root/lttng-t= races/instrument-20200623-222917

       trace@trace:~/cc$ sudo lttng enable-ch= annel user_func_trace --userspace
       UST channel user_func_trace enabled fo= r session instrument

       trace@trace:~/cc$ sudo lttng enable-ev= ent --userspace lttng_ust_cyg_profile:func_entry --channel user_func_trace<= br>        UST event lttng_ust_cyg_profile:func_e= ntry created in channel user_func_trace
       trace@trace:~/cc$ sudo lttng enable-ev= ent --userspace lttng_ust_cyg_profile:func_exit --channel user_func_trace        UST event lttng_ust_cyg_profile:func_e= xit created in channel user_func_trace

       trace@trace:~/cc$ sudo lttng start
       Tracing started for session instrument=

       trace@trace:~/cc$ sudo lttng destroy        Destroying session instrument..
       Session instrument destroyed

       trace@trace:~/cc$ sudo babeltrace /roo= t/lttng-traces/instrument-20200623-222917
       [22:29:55.388607059] (+?.?????????= ) trace lttng_ust_cyg_profile:func_entry: { cpu_id =3D 2 }, { addr =3D 0x56= 25C88B01A9, call_site =3D 0x5625C88B0237 }
       [22:29:55.388612293] (+0.000005234= ) trace lttng_ust_cyg_profile:func_exit: { cpu_id =3D 2 }, { addr =3D 0x562= 5C88B01A9, call_site =3D 0x5625C88B0237 }
       [22:29:55.388613215] (+0.000000922= ) trace lttng_ust_cyg_profile:func_exit: { cpu_id =3D 2 }, { addr =3D 0x562= 5C88B01EE, call_site =3D 0x7FE40BD5C0B3 }

B.R.
Changcheng
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