[cxx-abi-dev] Adding __cxa_thread_atexit() to the C++ ABI?

[Jason Merrill]

On 05/13/2014 02:52 PM, Matthew Dempsky wrote:
> On Mon, May 12, 2014 at 11:26 AM, Jason Merrill <jason at redhat.com> wrote:
>> "The effect of dlclosing a DSO with registered thread cleanups is
>> undefined."
>
> Do you mean "undefined" as in the C++ standard nasal demons sense, or
> just unspecified/implementation-defined?

Demons.  Realistically, the likely possibilities are "no effect" and 
"SEGV when we try to run the cleanups".

>> That seems reasonable, I was just trying to allow for implementations that
>> don't have any way to implement that, because they can't change the dynamic
>> loader.
>
> That's fair, though I'd argue that's the burden of the implementation
> to push for appropriate mechanisms in their dependencies to implement
> the needed functionality.  Are there platforms + toolchain
> combinations where this is unreasonable?

Well, GCC supports lots of platforms that don't also use glibc.

Jason