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From: Javier Pello <devel@otheo.eu>
To: libc-alpha@sourceware.org
Subject: [PATCH 0/4] elf: Fix hwcaps string size overestimation
Date: Mon, 5 Sep 2022 20:06:52 +0200	[thread overview]
Message-ID: <20220905200652.d69204581d15c64647da5cd2@otheo.eu> (raw)

Dear list,

Here is a series of patches related to the construction of the hwcaps
power set strings in function _dl_important_hwcaps in elf/dl-hwcaps.c.

The first patch is the main one. It fixes an overallocation of memory
for the subdirectory strings in _dl_important_hwcaps that was introduced
when adding glibc-hwcaps support for LD_LIBRARY_PATH. This overallocation
does not have any user-visible impact (extra space is simply unused) but
it would be nice to have it fixed.

The other patches are small changes, also in _dl_important_hwcaps, that
I have been carrying around for some time now, and I am submitting them
in case there is interest in having them merged. The last one improves
generation of the hwcaps power set strings by using a single pass over
all needed strings, instead of two, resulting in shorter code.

The third and fourth patches could conceivably be squashed together.

Regards,
Javier

Javier Pello (4):
  elf: Fix hwcaps string size overestimation
  elf: Simplify hwcaps masked value bit counting
  elf: Remove unneeded conditional in _dl_important_hwcaps
  elf: Simplify hwcaps power set string construction

 elf/dl-hwcaps.c | 98 +++++++++++++++++++------------------------------
 1 file changed, 38 insertions(+), 60 deletions(-)

-- 
2.36.0

             reply	other threads:[~2022-09-05 18:08 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-05 18:06 Javier Pello [this message]
2022-09-05 18:09 ` [PATCH 1/4] " Javier Pello
2022-09-08 10:15   ` Florian Weimer
2022-09-05 18:10 ` [PATCH 2/4] elf: Simplify hwcaps masked value bit counting Javier Pello
2022-09-05 18:12 ` [PATCH 3/4] elf: Remove unneeded conditional in _dl_important_hwcaps Javier Pello
2022-09-05 18:13 ` [PATCH 4/4] elf: Simplify hwcaps power set string construction Javier Pello
2022-09-06  7:35 ` [PATCH 0/4] elf: Fix hwcaps string size overestimation Florian Weimer
2022-09-06 18:12   ` Javier Pello
2022-09-08 11:23     ` Florian Weimer
2022-09-14 18:07       ` [PATCH 0/6] Remove legacy hwcaps support Javier Pello
2022-09-14 18:08         ` [PATCH 1/6] elf: Remove legacy hwcaps support from the dynamic loader Javier Pello
2022-09-14 18:10         ` [PATCH 2/6] elf: Remove legacy hwcaps support from ldconfig Javier Pello
2022-09-14 18:10         ` [PATCH 3/6] elf: Remove hwcap parameter from add_to_cache signature Javier Pello
2022-09-14 18:12         ` [PATCH 4/6] elf: Remove hwcap and bits_hwcap fields from struct cache_entry Javier Pello
2022-09-14 18:13         ` [PATCH 5/6] elf: Remove _dl_string_hwcap Javier Pello
2022-09-14 18:15         ` [PATCH 6/6] elf: Simplify output of hwcap subdirectories in ld.so help Javier Pello
2022-09-15  8:42           ` Carlos O'Donell
2022-09-15 19:12             ` Javier Pello
2022-09-14 21:23         ` [PATCH 0/6] Remove legacy hwcaps support Joseph Myers
2022-09-17 14:17         ` [PATCH v2 " Javier Pello
2022-09-17 14:18           ` [PATCH v2 1/6] elf: Remove legacy hwcaps support from the dynamic loader Javier Pello
2022-09-22 11:46             ` Florian Weimer
2022-09-17 14:19           ` [PATCH v2 2/6] elf: Remove legacy hwcaps support from ldconfig Javier Pello
2022-09-22 12:14             ` Florian Weimer
2022-09-17 14:20           ` [PATCH v2 3/6] elf: Remove hwcap parameter from add_to_cache signature Javier Pello
2022-09-22 16:02             ` Florian Weimer
2022-09-17 14:22           ` [PATCH v2 4/6] elf: Remove hwcap and bits_hwcap fields from struct cache_entry Javier Pello
2022-09-22 16:03             ` Florian Weimer
2022-09-17 14:23           ` [PATCH v2 5/6] elf: Remove _dl_string_hwcap Javier Pello
2022-09-17 14:24           ` [PATCH v2 6/6] elf: Simplify output of hwcap subdirectories in ld.so help Javier Pello
2022-09-21 16:26           ` [PATCH v2 0/6] Remove legacy hwcaps support Joseph Myers
2022-09-27 18:03           ` [PATCH v3 0/8] " Javier Pello
2022-09-27 18:05             ` [PATCH v3 1/8] x86_64: Remove platform directory library loading test Javier Pello
2022-10-03 14:56               ` Adhemerval Zanella Netto
2022-10-04 17:53                 ` Javier Pello
2022-10-04 17:59                   ` Adhemerval Zanella Netto
2022-09-27 18:05             ` [PATCH v3 2/8] elf: Remove legacy hwcaps support from the dynamic loader Javier Pello
2022-09-27 18:06             ` [PATCH v3 3/8] elf: Remove legacy hwcaps support from ldconfig Javier Pello
2022-10-03 15:31               ` Adhemerval Zanella Netto
2022-09-27 18:07             ` [PATCH v3 4/8] elf: Remove hwcap parameter from add_to_cache signature Javier Pello
2022-09-27 18:08             ` [PATCH v3 5/8] elf: Remove hwcap and bits_hwcap fields from struct cache_entry Javier Pello
2022-09-27 18:08             ` [PATCH v3 6/8] Add NEWS entry for legacy hwcaps removal Javier Pello
2022-10-03 15:44               ` Adhemerval Zanella Netto
2022-10-03 19:29                 ` Andreas Schwab
2022-10-03 19:49                   ` Adhemerval Zanella Netto
2022-10-03 19:59                     ` Florian Weimer
2022-10-04 18:00                       ` Adhemerval Zanella Netto
2022-10-05 18:12                         ` Javier Pello
2022-10-06 11:03                           ` Adhemerval Zanella Netto
2022-09-27 18:09             ` [PATCH v3 7/8] elf: Remove _dl_string_hwcap Javier Pello
2022-10-03 16:52               ` Adhemerval Zanella Netto
2022-09-27 18:10             ` [PATCH v3 8/8] elf: Simplify output of hwcap subdirectories in ld.so help Javier Pello
2022-10-03 17:02               ` Adhemerval Zanella Netto

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