Re: Strange failure on mamba

Hi,

On 2022-11-30 00:55:42 -0500, Tom Lane wrote:
> Andres Freund <andres(at)anarazel(dot)de> writes:
> > What libraries is postgres linked against? I don't know whether -z now only
> > affects the "top-level" dependencies of postgres, or also the dependencies of
> > shared libraries that haven't been built with -z now. The only dependencies
> > that I could see being relevant are libintl and openssl.
>
> Hmm. mamba is using both --enable-nls and --with-openssl, but
> I can't see a reason why the postmaster would be interacting with
> OpenSSL post-startup in test cases that don't use SSL. Perhaps
> libintl is doing something it shouldn't?

We do call into openssl in postmaster, via RandomCancelKey(). But we should
have signals masked at that point, so it shouldn't matter.

> > You could try if anything changes if you set LD_BIND_NOW, that should trigger
> > "recursive" dependencies to be loaded eagerly as well.
>
> Googling LD_BIND_NOW suggests that that's a Linux thing; do you know that
> it should have an effect on NetBSD?

I'm not at all sure it does, but I did see it listed in
https://man.netbsd.org/ld.elf_so.1

LD_BIND_NOW If defined immediate binding of Procedure Link Table
(PLT) entries is performed instead of the default lazy
method.

so I assumed it would do the same as on linux.

Greetings,

Andres Freund