reload .so without restarting process

[Hatt Tom]

Thanks for reply!

In my project ,  there need one script.so lib to be dynamiclly
modified and reloaded without reboot the process .the main process
uses its export functions ,I think dlopen and dlsym can do this .

At prevoius  ,I failed to achive this due to linking script.so lib
against executable   at compling time with "g++ -l "command ,it result
into dlclose can not remove script.so fully ,it would be because  the
reference count of script.so library  . So  the modification does not
work after reloading script.so .

After that failure , I tried to link script.so to middle.so ,than link
middle.so directly to executable .
It works ! script.so can be reloaded successfully , dlclose can remove
script.so fully .

During this work ,I find there are details of linking I should get to
be clear of .

Thanks!



 .

2013/12/5 Jonathan Wakely <jwakely.gcc@gmail.com>:
> On 5 December 2013 02:02, Hatt Tom wrote:
>>
>> So if I link that .so against my executable by "g++ -l " command
>> ,then I can not dlclose it fully in process at all  ?
>
> Right. Why is that a problem?  Why do you think you need to dlclose it?
>
>> Tp dlclose it  fully , I must not link it by compiler ,but manually
>> use dlopen and dlsym to resolve the external symbols  .
>>
>> But if so ,how to make  the compiler not to compalain "not reference
>> to symbol xxx" at compiling stage ?
>
> That means your program depends on symbols in the library directly, so
> you should link to it directly, and then you can't dlclose it.  But
> that should not be a problem.
>
> What are you trying to do?  Why can't you just let the linker do its
> job normally?



-- 
Best Regards!