[lttng-dev] [UST] SIGSEGV in lttng_ust_exit()

[Amit Margalit]

Indeed, it seems that lttng-ust-fork is needed.

Thanks!

Amit Margalit
IBM XIV - Storage Reinvented
XIV-NAS Development Team
Tel. 03-689-7774
Fax. 03-689-7230



From:   Mathieu Desnoyers <mathieu.desnoyers at efficios.com>
To:     Amit Margalit/Israel/IBM at IBMIL
Cc:     lttng-dev <lttng-dev at lists.lttng.org>
Date:   01/07/2014 05:44 PM
Subject:        Re: [lttng-dev] [UST] SIGSEGV in lttng_ust_exit()



Another thing: is your daemon using fork(), clone() or daemon() at any 
point ? If yes, did you LD_PRELOAD liblttng-ust-fork.so as stated in the 
lttng-ust(3) manpage in the environment starting your daemon ?

Thanks,

Mathieu



From: "Mathieu Desnoyers" <mathieu.desnoyers at efficios.com>
To: "Amit Margalit" <AMITM at il.ibm.com>
Cc: "lttng-dev" <lttng-dev at lists.lttng.org>
Sent: Monday, January 6, 2014 3:44:13 PM
Subject: Re: [lttng-dev] [UST] SIGSEGV in lttng_ust_exit()

Hi,

Can you try with updated lttng-ust (2.3.1 and stable-2.3 branch head) and 
update userspace RCU (0.8.1 and stable-0.8 head).

Thanks,

Mathieu



From: "Amit Margalit" <AMITM at il.ibm.com>
To: "lttng-dev" <lttng-dev at lists.lttng.org>
Sent: Wednesday, December 25, 2013 7:58:05 AM
Subject: [lttng-dev] [UST] SIGSEGV in lttng_ust_exit()

Hi, 

Using 2.3.0, we have a daemon process that's being restarted. The process 
is being asked to terminate using a simple 'kill', i.e. SIGTERM. 

Here is most of the traceback - any help is appreciated. 

.424636] ===26292=== #2 crash_sig_handler (sig=11, info=0xb519f0, 
uc=<optimized out>) at common/crashandler/crashandler_client.c:139
.424671] ===26292=== #3 <signal handler called>
.424730] ===26292=== #4 0x00007f4c2cb57831 in pthread_cancel () from 
/lib64/libpthread.so.0
.424788] ===26292=== #5 0x00007f4c2dec428e in lttng_ust_exit () at 
lttng-ust-comm.c:1296
.424846] ===26292=== #6 0x00007f4c2e310469 in _dl_fini () from 
/lib64/ld-linux-x86-64.so.2
.424904] ===26292=== #7 0x00007f4c2c4135e5 in __run_exit_handlers () from 
/lib64/libc.so.6
.424954] ===26292=== #8 0x00007f4c2c413635 in exit () from 
/lib64/libc.so.6
.425011] ===26292=== #9 0x00007f4c2c3fcbcd in __libc_start_main () from 
/lib64/libc.so.6
.425072] ===26292=== #10 0x000000000041cd49 in _start () at 
../sysdeps/x86_64/elf/start.S:113 


Amit Margalit 
IBM XIV - Storage Reinvented 
XIV-NAS Development Team 
Tel. 03-689-7774 
Fax. 03-689-7230
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-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com

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-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com
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