linux-kernel - Re: [PATCH 1/1 FYI] perf trace beauty: Fix generation of errno id->str table on ALT Linux

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Date:   Wed, 22 Jun 2022 22:13:09 +0300
From:   "Dmitry V. Levin" <ldv@...linux.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Gleb Fotengauer-Malinovskiy <glebfm@...linux.org>,
        Vitaly Chikunov <vt@...linux.org>,
        Mikhail Gordeev <obirvalger@...linux.org>,
        Hendrik Brueckner <brueckner@...ux.vnet.ibm.com>,
        Ian Rogers <irogers@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/1 FYI] perf trace beauty: Fix generation of errno
 id->str table on ALT Linux

Hi,

On Wed, Jun 22, 2022 at 01:24:15PM -0300, Arnaldo Carvalho de Melo wrote:
> Fyi, I'm carrying this on my perf tools tree to keep building on:
> 
> [perfbuilder@...e sisyphus]$ podman pull alt:sisyphus
> Trying to pull docker.io/library/alt:sisyphus...
> Getting image source signatures
> Copying blob 2b39ef1520dd skipped: already exists
> Copying blob 12717fd4baa0 skipped: already exists
> Copying config 6d48f46445 done
> Writing manifest to image destination
> Storing signatures
> 6d48f4644518cd96ffe1de6cd0333d2abc8312c0e4449e03b58b1d480f0f5905
> [perfbuilder@...e sisyphus]$ dsh .
> sh-4.4# bash
> [root@...18c77142b /]# cat /etc/os-release
> NAME="starter kit"
> VERSION="p10 (Hypericum)"
> ID=altlinux
> VERSION_ID=p10
> PRETTY_NAME="ALT Starterkit (Hypericum)"
> ANSI_COLOR="1;33"
> CPE_NAME="cpe:/o:alt:starterkit:p10"
> HOME_URL="http://en.altlinux.org/starterkits"
> BUG_REPORT_URL="https://bugs.altlinux.org/"
> [root@...18c77142b /]# rpm -qi bash
> Name        : bash
> Version     : 4.4.23
> Release     : alt1
> DistTag     : sisyphus+221902.500.4.1
> Architecture: noarch
> Install Date: Fri Jun  3 23:03:32 2022
> Group       : Shells
> Size        : 0
> License     : None
> Signature   : DSA/SHA1, Tue Feb 19 14:40:44 2019, Key ID 95c584d5ae4ae412
> Source RPM  : bash-defaults-4.4.23-alt1.src.rpm
> Build Date  : Tue Feb 19 14:40:42 2019
> Build Host  : ldv-sisyphus.hasher.altlinux.org
> Relocations : (not relocatable)
> Packager    : Dmitry V. Levin <ldv@...linux.org>
> Vendor      : ALT Linux Team
> Summary     : The GNU Bourne Again SHell (/bin/bash)
> Description :
> This package provides default setup for the GNU Bourne Again SHell (/bin/bash).
> [root@...18c77142b /]#
> 
> Perf uses that script to generate an id->str errno table for all arches,
> implemented in:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0337cf74ccf2a43437bff2e23b278e4f2dc4c6e2
> 
> But it is failing on:
> 
>   10    62.99 alt:p8                        : Ok   x86_64-alt-linux-gcc (GCC) 5.3.1 20151207 (ALT p8 5.3.1-alt3.M80P.1) , clang version 3.8.0 (tags/RELEASE_380/final)
>   11    91.50 alt:p9                        : Ok   x86_64-alt-linux-gcc (GCC) 8.4.1 20200305 (ALT p9 8.4.1-alt0.p9.1) , clang version 10.0.0
>   12    89.80 alt:p10                       : Ok   x86_64-alt-linux-gcc (GCC) 10.3.1 20210703 (ALT Sisyphus 10.3.1-alt2) , clang version 11.0.1
>   13     8.99 alt:sisyphus                  : FAIL gcc version 12.1.1 20220518 (ALT Sisyphus 12.1.1-alt1) (GCC)
>         |         ^~~~
>     442 |         case 47: return "EL3RST";
>         |         ^~~~
>     443 |         case 48: return "ELNRNG";
> 
> The generated file lacks the function start/end due to some strange
> glitch:
> 
> http://vger.kernel.org/~acme/perf/generated-altlinux-sisyphus-arch_errno_name_array.c
> 
> So I'm adding this workaround, can you please check why this is
> happening?

arch_errno_names.sh uses here-documents which are implemented in bash
using temporary files.  Looks like it couldn't create a temporary file,
e.g. because $TMPDIR points to a directory that doesn't exist or not
writable.  If there was some "cannot create temp file for here-document"
diagnostics in stderr, that's it.  If that's the case, it's not a problem
in the script but in the environment.

I've Cc'ed more people, maybe they could have a look.


-- 
ldv