[PATCH] c++/58796 Make nullptr match exception handlers of pointer type

[Jonathan Wakely]

On 15/07/16 23:36 +0200, Jakub Jelinek wrote:
>On Fri, Jul 15, 2016 at 10:07:03PM +0100, Jonathan Wakely wrote:
>> >+      if (typeid (*this) == typeid(__pointer_type_info))
>> >+        {
>> >+          *thr_obj = nullptr;
>> >+          return true;
>
>But you have the above store too.

That doesn't write to the exception object, it only does a single
dereference (compared to the double dereference of the racy write), so
it writes to the local variable in the PERSONALITY_FUNCTION in
eh_personality.cc

So that shouldn't race with other threads. I think.