No idea.

Thanks,

Mathieu

* Thibault, Daniel ([email protected]) wrote:
>    Below is an edited-for-brevity log that highlights an oddity of the 
> liblttng-ust finalizer: it triggers a load and initialization of libgcc_s, 
> but libgcc_s's finalizer doesn't run (I checked libgcc_s.so with readelf, and 
> there is indeed a FINI entry in there).  Is this a feature of libgcc_s?  Of 
> the Linux loader?  Or of LTTng?  Is it anything to worry about?
> 
> $ LD_DEBUG=libs 
> LD_PRELOAD=.libs/liblttng-ust-provider-ust-tests-demo.so:.libs/liblttng-ust-provider-ust-tests-demo3.so
>  ./demo
>        805:   find library=libdl.so.2 [0]; searching
>        805:    search cache=/etc/ld.so.cache
>        805:     trying file=/lib/x86_64-linux-gnu/libdl.so.2
>        805:   
>        805:   find library=libc.so.6 [0]; searching
>        805:    search cache=/etc/ld.so.cache
>        805:     trying file=/lib/x86_64-linux-gnu/libc.so.6
>        805:   
> [...]
>        805:   calling init: .libs/liblttng-ust-provider-ust-tests-demo.so
>        805:   
>        805:   
>        805:   initialize program: ./demo
>        805:   
>        805:   
>        805:   transferring control: ./demo
>        805:   
> Demo program starting.
> Tracing...  done.
>        805:   
>        805:   calling fini: ./demo [0]
>        805:   
>        805:   
>        805:   calling fini: .libs/liblttng-ust-provider-ust-tests-demo.so [0]
>        805:   
>        805:   
>        805:   calling fini: .libs/liblttng-ust-provider-ust-tests-demo3.so [0]
>        805:   
>        805:   
>        805:   calling fini: /lib/x86_64-linux-gnu/libdl.so.2 [0]
>        805:   
>        805:   
>        805:   calling fini: 
> /home/daniel/Documents/lttng-ust-2.1.1+-08a3170/liblttng-ust/.libs/liblttng-ust.so.0
>  [0]
>        805:   
>        805:   find library=libgcc_s.so.1 [0]; searching
>        805:    search 
> path=/home/daniel/Documents/lttng-ust-2.1.1+-08a3170/liblttng-ust/.libs       
>   (RPATH from file .libs/liblttng-ust-provider-ust-tests-demo.so)
>        805:     trying 
> file=/home/daniel/Documents/lttng-ust-2.1.1+-08a3170/liblttng-ust/.libs/libgcc_s.so.1
>        805:    search 
> path=/home/daniel/Documents/lttng-ust-2.1.1+-08a3170/liblttng-ust/.libs       
>   (RPATH from file .libs/liblttng-ust-provider-ust-tests-demo.so)
>        805:     trying 
> file=/home/daniel/Documents/lttng-ust-2.1.1+-08a3170/liblttng-ust/.libs/libgcc_s.so.1
>        805:    search cache=/etc/ld.so.cache
>        805:     trying file=/lib/x86_64-linux-gnu/libgcc_s.so.1
>        805:   
>        805:   
>        805:   calling init: /lib/x86_64-linux-gnu/libgcc_s.so.1
>        805:   
>        805:   
>        805:   calling fini: 
> /home/daniel/Documents/lttng-ust-2.1.1+-08a3170/liblttng-ust/.libs/liblttng-ust-tracepoint.so.0
>  [0]
>        805:   
>        805:   
>        805:   calling fini: /lib/x86_64-linux-gnu/librt.so.1 [0]
>        805:   
>        805:   
>        805:   calling fini: /usr/local/lib/liburcu-bp.so.2 [0]
>        805:   
>        805:   
>        805:   calling fini: /usr/local/lib/liburcu-cds.so.2 [0]
>        805:   
>        805:   
>        805:   calling fini: /lib/x86_64-linux-gnu/libpthread.so.0 [0]
>        805:   
> 
> Daniel U. Thibault
> R & D pour la défense Canada - Valcartier (RDDC Valcartier) / Defence R&D 
> Canada - Valcartier (DRDC Valcartier)
> Cyber sécurité pour les missions essentielles (CME) / Mission Critical Cyber 
> Security (MCCS)
> Protection des systèmes et contremesures (PSC) / Systems Protection & 
> Countermeasures (SPC)
> 2459 route de la Bravoure
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> Gouvernement du Canada / Government of Canada
> <http://www.valcartier.drdc-rddc.gc.ca/>
> 
> _______________________________________________
> lttng-dev mailing list
> [email protected]
> http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev

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

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