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[PING][PATCH v5 0/6] glibc tunables


Ping for 2-6/6, I pushed 1/6 since it is an independent cleanup.

Siddhesh

On Monday 24 October 2016 08:12 PM, Siddhesh Poyarekar wrote:
> Hi,
> 
> ... and I'm back!
> 
> Here is another updated patch set with suggestions from multiple people
> incorporated, including results from discussions at the GNU Tools Cauldron last
> month.
> 
>  - I had inadvertently opened a hole with MALLOC_CHECK_ where it could be read
>    in setuid binaries even if /etc/suid-debug was not present.  This is now
>    fixed.
> 
>  - __tunables_init is now called *really* early so that tunables are set up
>    before apply_irel is called.  H. J. will now have to split his patch such
>    that his IFUNC resolver looks at both, the tunables and the result of cpuid
>    instead of overriding cpuid using tunables.  I think this is a good thing
>    since it keeps the cpuid information honest and only masks it for the
>    specific purpose of IFUNC.
> 
>  - The very early initialization meant that I needed a new version of __access
>    that does not set errno.  That's another patch to the patchset.  This is an
>    internal function, so there is no ABI event here.
> 
>  - Enhanced the --enable-tunables option (in a separate patch) to accept string
>    values other than 'yes' and 'no'.  As discussed at Cauldron, this would
>    allow us to experiment with different frontends without committing to one
>    yet.  Right now there is only one frontend, i.e. 'valstring' that allows
>    setting tunables using the single GLIBC_TUNABLES environment variable.
> 
>  - Wrote a manual node for tunables.
> 
> As usual, the branch siddhesh/tunables has these patches and any patches they
> may depend on (like the doc changes for malloc).
> 
> Siddhesh Poyarekar (6):
>   Static inline functions for mallopt helpers
>   New internal function __access_noerrno
>   Add framework for tunables
>   Initialize tunable list with the GLIBC_TUNABLES environment variable
>   Enhance --enable-tunables to select tunables frontend at build time
>   User manual documentation for tunables
> 
>  INSTALL                                    |  18 ++
>  Makeconfig                                 |  16 ++
>  README.tunables                            |  84 ++++++
>  config.h.in                                |   3 +
>  config.make.in                             |   1 +
>  configure                                  |  17 ++
>  configure.ac                               |  10 +
>  csu/init-first.c                           |   2 -
>  csu/libc-start.c                           |  11 +
>  elf/Makefile                               |   7 +
>  elf/Versions                               |   3 +
>  elf/dl-support.c                           |   2 +
>  elf/dl-sysdep.c                            |   8 +
>  elf/dl-tunable-types.h                     |  46 +++
>  elf/dl-tunables.c                          | 435 +++++++++++++++++++++++++++++
>  elf/dl-tunables.h                          |  82 ++++++
>  elf/dl-tunables.list                       |  69 +++++
>  elf/rtld.c                                 |   2 +
>  include/unistd.h                           |   6 +
>  io/Makefile                                |   1 +
>  io/access.c                                |  10 +-
>  io/access_noerrno.c                        |  21 ++
>  malloc/Makefile                            |   6 +
>  malloc/arena.c                             |  54 ++++
>  malloc/malloc.c                            | 126 ++++++---
>  malloc/tst-malloc-usable-static-tunables.c |   1 +
>  malloc/tst-malloc-usable-static.c          |   1 +
>  malloc/tst-malloc-usable-tunables.c        |   1 +
>  manual/Makefile                            |   3 +-
>  manual/install.texi                        |  21 ++
>  manual/probes.texi                         |   2 +-
>  manual/tunables.texi                       | 184 ++++++++++++
>  scripts/gen-tunables.awk                   | 157 +++++++++++
>  sysdeps/mach/hurd/access.c                 |  20 +-
>  sysdeps/mach/hurd/dl-sysdep.c              |   8 +
>  sysdeps/nacl/access.c                      |  16 +-
>  sysdeps/nacl/nacl-interfaces.h             |   4 +
>  sysdeps/unix/access_noerrno.c              |  38 +++
>  sysdeps/unix/sysv/linux/generic/access.c   |  19 +-
>  39 files changed, 1469 insertions(+), 46 deletions(-)
>  create mode 100644 README.tunables
>  create mode 100644 elf/dl-tunable-types.h
>  create mode 100644 elf/dl-tunables.c
>  create mode 100644 elf/dl-tunables.h
>  create mode 100644 elf/dl-tunables.list
>  create mode 100644 io/access_noerrno.c
>  create mode 100644 malloc/tst-malloc-usable-static-tunables.c
>  create mode 100644 malloc/tst-malloc-usable-static.c
>  create mode 100644 malloc/tst-malloc-usable-tunables.c
>  create mode 100644 manual/tunables.texi
>  create mode 100644 scripts/gen-tunables.awk
>  create mode 100644 sysdeps/unix/access_noerrno.c
> 


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