topic Re: shl_load problem in Operating System - HP-UX

shl_load problem

Dedieu — Fri, 12 Jan 2001 14:23:03 GMT

i have to build a dynamic library but when i start the main program i receive :

/usr/lib/dld.sl: Can't shl_load() a library containing Thread Local Storage: /usr/lib/libpthread.1
/usr/lib/dld.sl: Exec format error

I have no choice, my library must be shared, is there a solution ?

Thanx

Re: shl_load problem

Kiran N. Mehta — Mon, 15 Jan 2001 12:58:06 GMT

I am afraid you have have hit the dynamic loader's limitation stated in man shl_load(3x): shl_load cannot load a shared-library (or any of its dependent libraries) if it uses thread local storage.

You will either have to arrange for the shared-library and its dependents to get loaded during program start-up (by linking them with the executable on the command-line) or you will have to change your library code to stop using TLS.

Re: shl_load problem

Martin Schneider_2 — Thu, 17 Jan 2002 11:31:47 GMT

I know of two ways to solve this problem.

a) eliminate all libraries from the link list that use TLS. In our case, this was the pthread library that was linked to our lib but never used.

b) Install patch PHSS_24303 . It adds a LD_PRELOAD functionality to overcome this problem. Look into the description of this patch for more information. In general, I found this patch to be very recommendable.

Regards, M.S.

Re: shl_load problem

aaa_17 — Wed, 13 Mar 2002 07:44:46 GMT

Hi Martin Schneider

I also get the same symptom
/usr/lib/dld.sl: Can't shl_load() a library containing Thread Local Storage: /usr/lib/libpthread.1
/usr/lib/dld.sl: Exec format error

I follow your 2 suggestions but the problem does not solve. Can you give more detailed info for me to solve the problem? Any example?

Thanks.