| From: | Bruce Momjian <bruce(at)momjian(dot)us> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Reduce function call costs on ELF platforms |
| Date: | 2021-11-23 01:13:28 |
| Message-ID: | 20211123011328.GA3320@momjian.us |
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| Thread: | |
| Lists: | pgsql-hackers |
On Mon, Nov 22, 2021 at 03:57:45PM -0800, Andres Freund wrote:
> It does however change symbol binding, basically making all symbols bound
> eagerly. Which I guess theoretically could be considered an ABI change,
> because it removes the ability to intercept symbols referenced in a previously
> loaded shared library, with a subsequently loaded library (e.g. loaded with
> RTLD_DEEPBIND) function before the symbol is used. But that seems like a
> stretch. And I think most ELF platforms/linux distributions have/are moving
> towards using -Wl,-z,now -Wl,-z,relro also makes symbols bound eagerly.
I found this really interesting, and I am surprised how things got so
suboptimal. Has it always been this way? Is it the use of C++ that is
causing this by default?
--
Bruce Momjian <bruce(at)momjian(dot)us> https://momjian.us
EDB https://enterprisedb.com
If only the physical world exists, free will is an illusion.
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