From: Carlos O'Donell via Libc-alpha <libc-alpha@sourceware.org>
To: Florian Weimer <fweimer@redhat.com>
Cc: Pedro Alves <palves@redhat.com>,
"xe-linux-external\(mailer list\)" <xe-linux-external@cisco.com>,
Carlos O'Donell via Libc-alpha <libc-alpha@sourceware.org>,
"Jeremy Stenglein \(jstengle\)" <jstengle@cisco.com>
Subject: Re: [RFC PATCH 0/3] implement dlmopen hooks for gdb
Date: Tue, 22 Sep 2020 14:41:17 -0400 [thread overview]
Message-ID: <4b05c127-573a-2e9b-1147-18f827bfd07c@redhat.com> (raw)
In-Reply-To: <87h7rpvgb4.fsf@oldenburg2.str.redhat.com>
On 9/22/20 2:04 PM, Florian Weimer wrote:
> * Carlos O'Donell:
>
>>> No, unlike GLIBC_PRIVATE, you can assume that if a GLIBC_DEBUG symbol is
>>> there (and perhaps has the documented size), it has the documented
>>> semantics. But you can't assume that it is present.
>>>
>>> The semantics of GLIBC_PRIVATE symbols can change arbitrarily, even
>>> between builds.
>>
>> Yes, absolutely, I agree completely, for it to be useful the semantics
>> have to be:
>>
>> - If you detect a given symbol foo@GLIBC_DEBUG, then the feature is
>> present and has the semantics you expect.
>>
>> - If you want new semantics then you need to make a foo2@GLIBC_DEBUG
>> with the new semantics.
>>
>> What are the runtime semantics of the symbol? How do you access it?
>
> That obviously depends on the symbol? Sorry, I don't quite understand
> these questions.
You noted "not intended to be used for run-time linking?"
Could you expand on what you're thinking there?
--
Cheers,
Carlos.
next prev parent reply other threads:[~2020-09-22 18:41 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-26 19:32 [RFC PATCH 0/3] implement dlmopen hooks for gdb Daniel Walker via Libc-alpha
2020-06-26 21:17 ` Carlos O'Donell via Libc-alpha
2020-07-23 18:40 ` Daniel Walker (danielwa) via Libc-alpha
2020-07-23 21:20 ` Carlos O'Donell via Libc-alpha
2020-09-16 16:18 ` Daniel Walker (danielwa) via Libc-alpha
2020-09-17 12:52 ` Carlos O'Donell via Libc-alpha
2020-09-17 12:59 ` Florian Weimer via Libc-alpha
2020-09-17 13:53 ` Carlos O'Donell via Libc-alpha
2020-09-18 15:35 ` Daniel Walker (danielwa) via Libc-alpha
2020-09-18 15:40 ` Florian Weimer via Libc-alpha
2020-09-21 20:02 ` Daniel Walker (danielwa) via Libc-alpha
2021-07-28 18:33 ` Daniel Walker via Libc-alpha
2021-07-28 18:48 ` H.J. Lu via Libc-alpha
2020-09-17 13:52 ` Carlos O'Donell via Libc-alpha
2020-09-22 17:06 ` Florian Weimer via Libc-alpha
2020-09-22 17:28 ` Carlos O'Donell via Libc-alpha
2020-09-22 17:37 ` Florian Weimer via Libc-alpha
2020-09-22 17:59 ` Carlos O'Donell via Libc-alpha
2020-09-22 18:04 ` Florian Weimer via Libc-alpha
2020-09-22 18:41 ` Carlos O'Donell via Libc-alpha [this message]
2020-09-22 18:44 ` Florian Weimer via Libc-alpha
2020-09-22 18:46 ` Carlos O'Donell via Libc-alpha
2020-09-22 18:17 ` Andreas Schwab
2020-09-22 19:13 ` Carlos O'Donell via Libc-alpha
2020-06-26 21:30 ` Florian Weimer via Libc-alpha
2020-06-27 1:10 ` Daniel Walker (danielwa) via Libc-alpha
2020-07-02 13:54 ` Conan Huang (conhuang) via Libc-alpha
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