Determining the memory used by a dynamically loaded shared object

[David Daney]

Marcus Clyne wrote:
> David Daney wrote:
>> Marcus Clyne wrote:
>>> Hi David,
>>>
>>> Thanks for your quick reply.  Other than forking and exec'ing, is 
>>> there an easy way of determining this value within a C program?
>>>
>>
>> You could write code (perhaps using something like libelf) to iterate 
>> through all the LOAD Program Headers, and add up their memory sizes.
>>
> I'm not sure how to access the LOAD program headers.  Are these 
> accessible like normal symbols using dlsym, or could you direct me to a 
> webpage where I could read up on it.
> 


http://en.wikipedia.org/wiki/Executable_and_Linkable_Format

> Thanks,
> 
> Marcus.
> 
>>
>>> Thanks,
>>>
>>> Marcus.
>>>
>>>
>>> David Daney wrote:
>>>> Marcus Clyne wrote:
>>>>> Hi,
>>>>>
>>>>> Is there any way to determine the actual memory used by a 
>>>>> dynamically loaded (i.e. by dlopen...) shared object.  AFAIK this 
>>>>> is less than the size of the .so file on disk, but I'm not sure how 
>>>>> to calculate it.
>>>>>
>>>>> Can anyone help?
>>>>>
>>>>
>>>> For ELF shared objects, it should be close to the size printed by 
>>>> the 'size' command.  The dynamic linker may have to allocate a small 
>>>> amount of additional memory as part of the linking process.
>>>>
>>>> David Daney
>>>>
>>>
>>>
>>
>>
> 
>