Re: on_exit_reset fails to clear DSM-related exit actions

On Fri, Mar 7, 2014 at 2:40 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>> The big picture here is that in the scenario being debated in the other
>> thread, exit() in a child process forked from a backend will execute that
>> backend's on_detach actions *even if the code had done on_exit_reset after
>> the fork*.
>
> Hmm. So the problematic sequence of events is where a postmaster
> child forks, and then exits without exec-ing, perhaps because e.g.
> exec fails?

I've attempted a fix for this case. The attached patch makes
test_shm_mq fork() a child process that calls on_exit_reset() and then
exits. Without the fix I just pushed, this causes the tests to fail;
with this fix, this does not cause the tests to fail.

I'm not entirely sure that this is exactly right, but I think it's an
improvement.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
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