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Re: Finding the source code for ___tls_get_addr_internal()
On Thu, Jan 17, 2013 at 2:11 PM, Saul Tamari <stamari@gmail.com> wrote:
> On Thu, Jan 17, 2013 at 12:07 AM, Ian Lance Taylor <iant@google.com> wrote:
>> If you put code that accesses TLS variables into a shared library, and
>> that code was not compiled with -fpic/-fPIC nor with
>> -ftls-model=global-dynamic, then accessing the TLS variables will read
>> the wrong values.
>
> Is there a way to verify if there are wrongly initialized TLS
> variables in some application or I can only detect such cases when the
> application fails?
You could probably look at the dynamic relocations and see if there
are any TLS relocations in the shared library that are not global
dynamic.
> Can the linker or runtime linker warn about these cases? Or because we
> haven't compiled with -fpic or -ftls-model=global-dynamic, then the
> runtime linker doesn't know there are TLS variables in our binary?
I think the linker (ld) could warn about this case.
Ian