From: Florian Weimer via Libc-alpha <libc-alpha@sourceware.org>
To: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>
Cc: Adhemerval Zanella via Libc-alpha <libc-alpha@sourceware.org>,
Fangrui Song <maskray@google.com>
Subject: Re: [PATCH 4/7] Move libc_freeres_ptrs and libc_subfreeres to weak functions
Date: Mon, 12 Dec 2022 15:05:41 +0100 [thread overview]
Message-ID: <87iligsone.fsf@oldenburg.str.redhat.com> (raw)
In-Reply-To: <f8cd6683-420c-c6ac-4d91-0101f03272ea@linaro.org> (Adhemerval Zanella Netto's message of "Mon, 12 Dec 2022 10:49:41 -0300")
* Adhemerval Zanella Netto:
>> I think you should consider introducing a call_free_static_weak that
>> does something like
>>
>> if (&ptr != NULL)
>> free (ptr);
>>
>> in the static case, and calls
>>
>> free (ptr);
>>
>> unconditionally for the dynamic case. And then add attribute_hidden
>> variable declarations to a suitable wrapper header under include/.
>>
>> This avoids writing all these little helper functions.
>
> We already have call_free_static_weak function that does exactly that,
I don't see call_free_static_weak?
> maybe you are proposing a something like:
>
> # ifdef SHARED
> # define declare_libc_freeres (name, ptr) \
> static void name (void) { free (ptr); }
> # else
> # define declare_libc_freeres (name, ptr) \
> static void name (void) { if (ptr != NULL) free (ptr); }
> # endif
It has to be &ptr != NULL for the weak case, and you also need to create
a weak alias.
Thanks,
Florian
next prev parent reply other threads:[~2022-12-12 14:06 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-15 19:31 [PATCH 0/7] Fixing remaining lld issues Adhemerval Zanella via Libc-alpha
2022-11-15 19:31 ` [PATCH 1/7] configure: Move locale tools early Adhemerval Zanella via Libc-alpha
2022-11-15 19:31 ` [PATCH 2/7] elf: Do not assume symbol order on tst-audit25{a,b} Adhemerval Zanella via Libc-alpha
2022-12-12 12:36 ` Adhemerval Zanella Netto via Libc-alpha
2022-11-15 19:31 ` [PATCH 3/7] stdlib: Move _IO_cleanup to call_function_static_weak Adhemerval Zanella via Libc-alpha
2022-12-12 10:52 ` Florian Weimer via Libc-alpha
2022-12-13 16:52 ` Joseph Myers
2022-11-15 19:31 ` [PATCH 4/7] Move libc_freeres_ptrs and libc_subfreeres to weak functions Adhemerval Zanella via Libc-alpha
2022-12-12 10:55 ` Florian Weimer via Libc-alpha
2022-12-12 13:14 ` Adhemerval Zanella Netto via Libc-alpha
2022-12-12 10:58 ` Florian Weimer via Libc-alpha
2022-12-12 13:16 ` Adhemerval Zanella Netto via Libc-alpha
2022-12-12 11:00 ` Florian Weimer via Libc-alpha
2022-12-12 13:49 ` Adhemerval Zanella Netto via Libc-alpha
2022-12-12 14:05 ` Florian Weimer via Libc-alpha [this message]
2022-12-12 14:16 ` Adhemerval Zanella Netto via Libc-alpha
2022-12-12 15:39 ` Florian Weimer via Libc-alpha
2022-12-12 11:05 ` Andreas Schwab via Libc-alpha
2022-12-12 13:49 ` Adhemerval Zanella Netto via Libc-alpha
2022-12-12 11:08 ` Florian Weimer via Libc-alpha
2022-12-12 13:51 ` Adhemerval Zanella Netto via Libc-alpha
2022-11-15 19:31 ` [PATCH 5/7] libio: Remove the usage of __libc_IO_vtables Adhemerval Zanella via Libc-alpha
2022-12-12 11:40 ` Florian Weimer via Libc-alpha
2022-11-15 19:31 ` [PATCH 6/7] Remove --with-default-link configure option Adhemerval Zanella via Libc-alpha
2022-11-15 19:31 ` [PATCH 7/7] Remove set-hooks.h from generic includes Adhemerval Zanella via Libc-alpha
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