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Subject: bug#75658: Non-deterministic Gash error in =?UTF-8?Q?=E2=80=98gcc-mesboot-4.9.4=E2=80=99?=
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Hello,
I stumbled upon this interesting non-deterministic failure while
building =E2=80=98gcc-mesboot-4.9.4.drv=E2=80=99 on current =E2=80=98core-p=
ackages-team=E2=80=99 (which
is unchanged compared to =E2=80=98master=E2=80=99):
--8<---------------cut here---------------start------------->8---
source directory: "/tmp/guix-build-gcc-mesboot-4.9.4.drv-0/gcc-4.9.4" (rela=
tive from build: ".")
build directory: "/tmp/guix-build-gcc-mesboot-4.9.4.drv-0/gcc-4.9.4"
configure flags: ("CONFIG_SHELL=3D/gnu/store/bhmkf29xki04mmydpm0axpbh35md4v=
fb-gash-boot-0.3.0/bin/bash" "SHELL=3D/gnu/store/bhmkf29xki04mmydpm0axpbh35=
md4vfb-gash-boot-0.3.0/bin/bash" "--prefix=3D/gnu/store/mgbd56zvid129vkk8l9=
zir7pf46r5038-gcc-mesboot-4.9.4" "--enable-fast-install" "--build=3Dx86_64-=
unknown-linux-gnu" "--prefix=3D/gnu/store/mgbd56zvid129vkk8l9zir7pf46r5038-=
gcc-mesboot-4.9.4" "--build=3Di686-unknown-linux-gnu" "--host=3Di686-unknow=
n-linux-gnu" "--with-host-libstdcxx=3D-lsupc++" "--with-native-system-heade=
r-dir=3D/gnu/store/qxp7icgwbn1hqqwvkan7aljgzfn439zh-glibc-mesboot-2.16.0/in=
clude" "--with-build-sysroot=3D/gnu/store/qxp7icgwbn1hqqwvkan7aljgzfn439zh-=
glibc-mesboot-2.16.0/include" "--disable-bootstrap" "--disable-decimal-floa=
t" "--disable-libatomic" "--disable-libcilkrts" "--disable-libgomp" "--disa=
ble-libitm" "--disable-libmudflap" "--disable-libquadmath" "--disable-libsa=
nitizer" "--disable-libssp" "--disable-libvtv" "--disable-lto" "--disable-l=
to-plugin" "--disable-multilib" "--disable-plugin" "--disable-threads" "--e=
nable-languages=3Dc,c++" "--enable-static" "--enable-shared" "--enable-thre=
ads=3Dsingle" "--disable-libstdcxx-pch" "--disable-build-with-cxx")
Backtrace:
In gash/eval.scm:
221: 19 [eval-sh (<sh-set!> ("ac_useropt" (<sh-cmd-sub> #)))]
In srfi/srfi-1.scm:
642: 18 [for-each #<procedure 1502320 at gash/eval.scm:221:17 (name word)>=
# #]
In gash/eval.scm:
222: 17 [#<procedure 1502320 at gash/eval.scm:221:17 (name word)> "ac_user=
opt" #]
131: 16 [eval-word (<sh-cmd-sub> (<sh-pipeline> # #)) #:output string ...]
121: 15 [expand-word (<sh-cmd-sub> (<sh-pipeline> # #)) #:output string ..=
.]
In gash/shell.scm:
289: 14 [sh:substitute-command #<procedure 15022a0 at gash/eval.scm:129:35=
()>]
270: 13 [%subshell #<procedure v ()>]
In ice-9/boot-9.scm:
157: 12 [catch quit #<procedure v ()> ...]
In ice-9/r4rs.scm:
176: 11 [with-output-to-port #<variable 13a02e0 value: #<output: file 39>>=
...]
In srfi/srfi-1.scm:
619: 10 [for-each #<procedure eval-sh (exp)> ((<sh-pipeline> # #))]
In gash/shell.scm:
344: 9 [sh:pipeline #<procedure 1506f40 at gash/eval.scm:149:6 ()> ...]
310: 8 [plumb #<input: #{read pipe}# 36> #f ...]
270: 7 [%subshell #<procedure thunk* ()>]
In ice-9/boot-9.scm:
157: 6 [catch quit #<procedure thunk* ()> ...]
In gash/shell.scm:
316: 5 [thunk*]
129: 4 [sh:exec-let () "sed" "s/[-+.]/_/g"]
92: 3 [exec-utility () ...]
In srfi/srfi-1.scm:
616: 2 [for-each #<procedure ec3b20 at gash/shell.scm:70:12 (i)> (0 1 2 ..=
.)]
In ice-9/boot-9.scm:
1473: 1 [dup->port #<input: file 38> "r" 7]
In unknown file:
?: 0 [fdopen 7 "r"]
ERROR: In procedure fdopen:
ERROR: In procedure scm_fdes_to_port: Bad file descriptor
Backtrace:
In gash/eval.scm:
221: 19 [eval-sh (<sh-set!> ("ac_useropt" (<sh-cmd-sub> #)))]
In srfi/srfi-1.scm:
642: 18 [for-each #<procedure 1502320 at gash/eval.scm:221:17 (name word)>=
# #]
In gash/eval.scm:
222: 17 [#<procedure 1502320 at gash/eval.scm:221:17 (name word)> "ac_user=
opt" #]
131: 16 [eval-word (<sh-cmd-sub> (<sh-pipeline> # #)) #:output string ...]
121: 15 [expand-word (<sh-cmd-sub> (<sh-pipeline> # #)) #:output string ..=
.]
In gash/shell.scm:
289: 14 [sh:substitute-command #<procedure 15022a0 at gash/eval.scm:129:35=
()>]
270: 13 [%subshell #<procedure v ()>]
In ice-9/boot-9.scm:
157: 12 [catch quit #<procedure v ()> ...]
In ice-9/r4rs.scm:
176: 11 [with-output-to-port #<variable 13a02e0 value: #<output: file 39>>=
...]
In srfi/srfi-1.scm:
619: 10 [for-each #<procedure eval-sh (exp)> ((<sh-pipeline> # #))]
In gash/shell.scm:
347: 9 [sh:pipeline #<procedure 1506f40 at gash/eval.scm:149:6 ()> ...]
310: 8 [plumb #f #<output: #{write pipe}# 38> ...]
270: 7 [%subshell #<procedure thunk* ()>]
In ice-9/boot-9.scm:
157: 6 [catch quit #<procedure thunk* ()> ...]
In gash/shell.scm:
316: 5 [thunk*]
129: 4 [sh:exec-let () "printf" "%s\\n" "libsanitizer"]
92: 3 [exec-utility () ...]
In srfi/srfi-1.scm:
616: 2 [for-each #<procedure ec3b20 at gash/shell.scm:70:12 (i)> (0 1 2 ..=
.)]
In ice-9/boot-9.scm:
1473: 1 [dup->port #<input: file 36> "r" 7]
In unknown file:
?: 0 [fdopen 7 "r"]
ERROR: In procedure fdopen:
ERROR: In procedure scm_fdes_to_port: Bad file descriptor
checking build system type... i686-unknown-linux-gnu
checking host system type... i686-unknown-linux-gnu
checking target system type... i686-unknown-linux-gnu
checking for a BSD-compatible install... ./install-sh -c
checking whether ln works... yes
checking whether ln -s works... yes
checking for a sed that does not truncate output... /gnu/store/i61mvrw30k8n=
g8hxym8s180nydnsbji6-gash-utils-boot-0.2.0/bin/sed
checking for gawk... gawk
checking for libsanitizer support... yes
--8<---------------cut here---------------end--------------->8---
What happens is that Gash crashes in the middle of a substitution on
$ac_useropt. As a result, =E2=80=98--disable-libsanitizer=E2=80=99 (and ot=
her options,
it seems) are discarded, hence the =E2=80=9Clibsanitizer support... yes=E2=
=80=9D line.
Hours later, build fails while trying to build libsanitizer.
Any idea what could cause EBADF?
Thanks,
Ludo=E2=80=99.
Content-Disposition: inline Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Mailer: MIME-tools 5.505 (Entity 5.505) Content-Type: text/plain; charset=utf-8 X-Loop: help-debbugs@HIDDEN From: help-debbugs@HIDDEN (GNU bug Tracking System) To: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludovic.courtes@HIDDEN> Subject: bug#75658: Acknowledgement (Non-deterministic Gash error in =?UTF-8?Q?=E2=80=98gcc-mesboot-4.9.4=E2=80=99?=) Message-ID: <handler.75658.B.173723810610127.ack <at> debbugs.gnu.org> References: <87msfnsrli.fsf@HIDDEN> X-Gnu-PR-Message: ack 75658 X-Gnu-PR-Package: guix Reply-To: 75658 <at> debbugs.gnu.org Date: Sat, 18 Jan 2025 22:09:02 +0000 Thank you for filing a new bug report with debbugs.gnu.org. This is an automatically generated reply to let you know your message has been received. Your message is being forwarded to the package maintainers and other interested parties for their attention; they will reply in due course. As you requested using X-Debbugs-CC, your message was also forwarded to Janneke Nieuwenhuizen <janneke@HIDDEN>, Timothy Sample <samplet@HIDDEN= m> (after having been given a bug report number, if it did not have one). Your message has been sent to the package maintainer(s): bug-guix@HIDDEN If you wish to submit further information on this problem, please send it to 75658 <at> debbugs.gnu.org. Please do not send mail to help-debbugs@HIDDEN unless you wish to report a problem with the Bug-tracking system. --=20 75658: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D75658 GNU Bug Tracking System Contact help-debbugs@HIDDEN with problems
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Subject: bug#75658: Non-deterministic Gash error in =?UTF-8?Q?=E2=80=98gcc-mesboot-4.9.4=E2=80=99?=
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From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@HIDDEN>
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Ludovic Court=C3=A8s <ludovic.courtes@HIDDEN> skribis:
> I stumbled upon this interesting non-deterministic failure while
> building =E2=80=98gcc-mesboot-4.9.4.drv=E2=80=99 on current =E2=80=98core=
-packages-team=E2=80=99 (which
> is unchanged compared to =E2=80=98master=E2=80=99):
Just got another one:
--8<---------------cut here---------------start------------->8---
checking for struct sigaction.sa_sigaction... yes
checking for volatile sig_atomic_t... yes
checking for sighandler_t... yes
checking for sigprocmask... (cached) yes
checking whether sleep is declared... yes
checking for working sleep... yes
checking for socklen_t... Backtrace:
In gash/shell.scm:
129: 19 [sh:exec-let () "ac_fn_c_try_compile" "2817"]
In gash/environment.scm:
215: 18 [save-variables-excursion () ...]
292: 17 [with-arguments # #<procedure 2210f00 at gash/shell.scm:145:25 ()>]
389: 16 [call-with-return #<procedure 2210e40 at gash/shell.scm:147:28 ()>]
In srfi/srfi-1.scm:
619: 15 [for-each #<procedure eval-sh (exp)> ((<sh-begin> # # # ...))]
619: 14 [for-each #<procedure eval-sh (exp)> (# # # # ...)]
In gash/shell.scm:
441: 13 [sh:cond # #]
55: 12 [without-errexit #<procedure 13185e0 at gash/eval.scm:149:6 ()>]
372: 11 [sh:and #<procedure 1318560 at gash/eval.scm:149:6 ()> ...]
55: 10 [without-errexit #<procedure 1318560 at gash/eval.scm:149:6 ()>]
372: 9 [sh:and #<procedure 1318500 at gash/eval.scm:149:6 ()> ...]
55: 8 [without-errexit #<procedure 1318500 at gash/eval.scm:149:6 ()>]
In srfi/srfi-1.scm:
616: 7 [for-each #<procedure eval-sh (exp)> (# # # # ...)]
619: 6 [for-each #<procedure eval-sh (exp)> (# # #)]
In gash/shell.scm:
245: 5 [#<procedure 1f63030 at gash/shell.scm:239:17 ()>]
129: 4 [sh:exec-let () "grep" "-v" "^ *+" "conftest.err"]
92: 3 [exec-utility () ...]
In srfi/srfi-1.scm:
616: 2 [for-each #<procedure ea9a60 at gash/shell.scm:70:12 (i)> (0 1 2 ..=
.)]
In ice-9/boot-9.scm:
1473: 1 [dup->port #<input: file 20> "r" 7]
In unknown file:
?: 0 [fdopen 7 "r"]
ERROR: In procedure fdopen:
ERROR: In procedure scm_fdes_to_port: Bad file descriptor
yes
checking whether symlink handles trailing slash correctly... yes
checking whether <sys/ioctl.h> declares ioctl... yes
checking for unsetenv... yes
checking for unsetenv() return type... int
--8<---------------cut here---------------end--------------->8---
That one likely doesn=E2=80=99t change the build outcome since it still
determines that =E2=80=98socklen_t=E2=80=99 is defined, but it sounds a bit=
like a dice
roll.
Ludo=E2=80=99.
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Subject: bug#75658: Non-deterministic Gash error in =?UTF-8?Q?=E2=80=98gcc-mesboot-4.9.4=E2=80=99?=
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From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@HIDDEN>
In-Reply-To: <87wmeqpspy.fsf@HIDDEN> ("Ludovic =?UTF-8?Q?Court=C3=A8s?="'s message of "Sun, 19 Jan 2025 19:24:25 +0100")
References: <87msfnsrli.fsf@HIDDEN> <87wmeqpspy.fsf@HIDDEN>
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Ludovic Court=C3=A8s <ludo@HIDDEN> skribis:
> Ludovic Court=C3=A8s <ludovic.courtes@HIDDEN> skribis:
>
>> I stumbled upon this interesting non-deterministic failure while
>> building =E2=80=98gcc-mesboot-4.9.4.drv=E2=80=99 on current =E2=80=98cor=
e-packages-team=E2=80=99 (which
>> is unchanged compared to =E2=80=98master=E2=80=99):
>
> Just got another one:
A few more, obtained by running the start of the =E2=80=98configure=E2=80=
=99 script in a
loop (added an =E2=80=98exit=E2=80=99 on line 2562, which is after the firs=
t 4 lines of
output).
while ./configure CONFIG_SHELL=3D/gnu/store/98bd49rhyia49y0b9d7sk8phsq14g=
3nk-gash-boot-0.3.0/bin/bash SHELL=3D/gnu/store/98bd49rhyia49y0b9d7sk8phsq1=
4g3nk-gash-boot-0.3.0/bin/bash --prefix=3D/gnu/store/awkbdj5j41pv5kiy9ifs0z=
l40jamwfw4-gcc-mesboot-4.9.4 --enable-fast-install --build=3Dx86_64-unknown=
-linux-gnu --prefix=3D/gnu/store/awkbdj5j41pv5kiy9ifs0zl40jamwfw4-gcc-mesbo=
ot-4.9.4 --build=3Di686-unknown-linux-gnu --host=3Di686-unknown-linux-gnu -=
-with-host-libstdcxx=3D-lsupc++ --with-native-system-header-dir=3D/gnu/stor=
e/gc91zbacrk6prhvm91cj3x9rr3v2k17q-glibc-mesboot-2.16.0/include --with-buil=
d-sysroot=3D/gnu/store/gc91zbacrk6prhvm91cj3x9rr3v2k17q-glibc-mesboot-2.16.=
0/include --disable-bootstrap --disable-decimal-float --disable-libatomic -=
-disable-libcilkrts --disable-libgomp --disable-libitm --disable-libmudflap=
--disable-libquadmath --disable-libsanitizer --disable-libssp --disable-li=
bvtv --disable-lto --disable-lto-plugin --disable-multilib --disable-plugin=
--disable-threads --enable-languages=3Dc,c++ --enable-static --enable-shar=
ed --enable-threads=3Dsingle --disable-libstdcxx-pch --disable-build-with-c=
xx ; do : ;done
--8<---------------cut here---------------start------------->8---
warning: failed to install locale: Invalid argument
Backtrace:
In gash/environment.scm:
371: 19 [call-with-break #<procedure 2dda9450 at gash/shell.scm:400:6 ()>]
In srfi/srfi-1.scm:
619: 18 [for-each #<procedure 2dda9420 at gash/shell.scm:401:18 (value)> #]
In gash/environment.scm:
353: 17 [call-with-continue #<procedure 2de13460 at gash/eval.scm:158:14 (=
)>]
In srfi/srfi-1.scm:
616: 16 [for-each #<procedure eval-sh (exp)> (# # #)]
619: 15 [for-each #<procedure eval-sh (exp)> ((<sh-set!> ("ac_optarg" #)))]
In gash/eval.scm:
221: 14 [eval-sh (<sh-set!> ("ac_optarg" (<sh-cmd-sub> #)))]
In srfi/srfi-1.scm:
642: 13 [for-each #<procedure 2da0f5e0 at gash/eval.scm:221:17 (name word)=
> # #]
In gash/eval.scm:
222: 12 [#<procedure 2da0f5e0 at gash/eval.scm:221:17 (name word)> "ac_opt=
arg" #]
131: 11 [eval-word (<sh-cmd-sub> (<sh-exec> "expr" # ":" ...)) #:output st=
ring ...]
121: 10 [expand-word (<sh-cmd-sub> (<sh-exec> "expr" # ...)) #:output ...]
In gash/shell.scm:
289: 9 [sh:substitute-command #<procedure 2da0f560 at gash/eval.scm:129:35=
()>]
270: 8 [%subshell #<procedure v ()>]
In ice-9/boot-9.scm:
157: 7 [catch quit #<procedure v ()> ...]
In ice-9/r4rs.scm:
176: 6 [with-output-to-port #<variable 2de5dc00 value: #<output: file /dev=
/pts/19>> ...]
In srfi/srfi-1.scm:
619: 5 [for-each #<procedure eval-sh (exp)> ((<sh-exec> "expr" # ":" ...))]
In gash/shell.scm:
129: 4 [sh:exec-let () "expr" ...]
92: 3 [exec-utility () ...]
In srfi/srfi-1.scm:
616: 2 [for-each #<procedure 2d60f0a0 at gash/shell.scm:70:12 (i)> (0 1 2 =
...)]
In ice-9/boot-9.scm:
1473: 1 [dup->port #<input: file /dev/pts/19> "r0" 7]
In unknown file:
?: 0 [fdopen 7 "r0"]
ERROR: In procedure fdopen:
ERROR: In procedure scm_fdes_to_port: Bad file descriptor
--8<---------------cut here---------------end--------------->8---
And:
--8<---------------cut here---------------start------------->8---
Backtrace:
In ice-9/boot-9.scm:
157: 17 [catch #t #<catch-closure 25cdf0a0> ...]
In unknown file:
?: 16 [apply-smob/1 #<catch-closure 25cdf0a0>]
In ice-9/boot-9.scm:
63: 15 [call-with-prompt prompt0 ...]
In ice-9/eval.scm:
432: 14 [eval # #]
In ice-9/boot-9.scm:
793: 13 [call-with-input-file "./configure" ...]
In gash/gash.scm:
121: 12 [#<procedure 262f7700 at gash/gash.scm:120:19 (port)> #<input: ./c=
onfigure 5>]
In gash/repl.scm:
38: 11 [run-repl #<input: ./configure 5> #f]
In gash/environment.scm:
371: 10 [call-with-break #<procedure 26335c00 at gash/shell.scm:400:6 ()>]
In srfi/srfi-1.scm:
616: 9 [for-each #<procedure 26335bd0 at gash/shell.scm:401:18 (value)> #]
In gash/environment.scm:
353: 8 [call-with-continue #<procedure 26315260 at gash/eval.scm:158:14 ()=
>]
In srfi/srfi-1.scm:
619: 7 [for-each #<procedure eval-sh (exp)> (# # #)]
In gash/shell.scm:
441: 6 [sh:cond #]
55: 5 [without-errexit #<procedure 26861c80 at gash/eval.scm:149:6 ()>]
129: 4 [sh:exec-let () "test" "-n" ""]
92: 3 [exec-utility () ...]
In srfi/srfi-1.scm:
619: 2 [for-each #<procedure 26272b60 at gash/shell.scm:70:12 (i)> (0 1 2 =
...)]
In ice-9/boot-9.scm:
1473: 1 [dup->port #<output: file /dev/pts/19> "w0" 6]
In unknown file:
?: 0 [fdopen 6 "w0"]
ERROR: In procedure fdopen:
ERROR: In procedure scm_fdes_to_port: Bad file descriptor
--8<---------------cut here---------------end--------------->8---
And:
--8<---------------cut here---------------start------------->8---
Backtrace:
In ice-9/boot-9.scm:
157: 13 [catch #t #<catch-closure 1879d00> ...]
In unknown file:
?: 12 [apply-smob/1 #<catch-closure 1879d00>]
In ice-9/boot-9.scm:
63: 11 [call-with-prompt prompt0 ...]
In ice-9/eval.scm:
432: 10 [eval # #]
In ice-9/boot-9.scm:
793: 9 [call-with-input-file "./configure" ...]
In gash/gash.scm:
121: 8 [#<procedure 1e905e0 at gash/gash.scm:120:19 (port)> #<input: ./con=
figure 5>]
In gash/repl.scm:
38: 7 [run-repl #<input: ./configure 5> #f]
In gash/shell.scm:
441: 6 [sh:cond #]
55: 5 [without-errexit #<procedure 2192680 at gash/eval.scm:149:6 ()>]
129: 4 [sh:exec-let () "test" "xi686-unknown-linux-gnu" "!=3D" "x"]
92: 3 [exec-utility () ...]
In srfi/srfi-1.scm:
619: 2 [for-each #<procedure 1e06920 at gash/shell.scm:70:12 (i)> (0 1 2 .=
..)]
In ice-9/boot-9.scm:
1473: 1 [dup->port #<output: file /dev/pts/19> "w0" 6]
In unknown file:
?: 0 [fdopen 6 "w0"]
ERROR: In procedure fdopen:
ERROR: In procedure scm_fdes_to_port: Bad file descriptor
--8<---------------cut here---------------end--------------->8---
All these happen before the line:
--8<---------------cut here---------------start------------->8---
checking build system type... i686-unknown-linux-gnu
--8<---------------cut here---------------end--------------->8---
Good news: I was able to reproduce with Gash over Guile 3.0.9:
--8<---------------cut here---------------start------------->8---
ludo@ribbon /tmp/guix-build-gcc-mesboot-4.9.4.drv-0/gcc-4.9.4$ guix build g=
ash
/gnu/store/mz5swdf35iwplrgdvm4z256py585nxi6-gash-0.3.0
ludo@ribbon /tmp/guix-build-gcc-mesboot-4.9.4.drv-0/gcc-4.9.4$ while /gnu/s=
tore/mz5swdf35iwplrgdvm4z256py585nxi6-gash-0.3.0/bin/gash ./configure CONFI=
G_SHELL=3D/gnu/store/98bd49rhyia49y0b9d7sk8phsq14g3nk-gash-boot-0.3.0/bin/b=
ash SHELL=3D/gnu/store/98bd49rhyia49y0b9d7sk8phsq14g3nk-gash-boot-0.3.0/bin=
/bash --prefix=3D/gnu/store/awkbdj5j41pv5kiy9ifs0zl40jamwfw4-gcc-mesboot-4.=
9.4 --enable-fast-install --build=3Dx86_64-unknown-linux-gnu --prefix=3D/gn=
u/store/awkbdj5j41pv5kiy9ifs0zl40jamwfw4-gcc-mesboot-4.9.4 --build=3Di686-u=
nknown-linux-gnu --host=3Di686-unknown-linux-gnu --with-host-libstdcxx=3D-l=
supc++ --with-native-system-header-dir=3D/gnu/store/gc91zbacrk6prhvm91cj3x9=
rr3v2k17q-glibc-mesboot-2.16.0/include --with-build-sysroot=3D/gnu/store/gc=
91zbacrk6prhvm91cj3x9rr3v2k17q-glibc-mesboot-2.16.0/include --disable-boots=
trap --disable-decimal-float --disable-libatomic --disable-libcilkrts --dis=
able-libgomp --disable-libitm --disable-libmudflap --disable-libquadmath --=
disable-libsanitizer --disable-libssp --disable-libvtv --disable-lto --disa=
ble-lto-plugin --disable-multilib --disable-plugin --disable-threads --enab=
le-languages=3Dc,c++ --enable-static --enable-shared --enable-threads=3Dsin=
gle --disable-libstdcxx-pch --disable-build-with-cxx ; do : ;done
[=E2=80=A6]
Backtrace:
In ice-9/boot-9.scm:
1752:10 18 (with-exception-handler _ _ #:unwind? _ #:unwind-for-type _)
In unknown file:
17 (apply-smob/0 #<thunk 7f8e78d15300>)
In ice-9/boot-9.scm:
724:2 16 (call-with-prompt _ _ #<procedure default-prompt-handler (k pr=
oc)>)
In ice-9/eval.scm:
619:8 15 (_ #(#(#<directory (guile-user) 7f8e78d18c80>)))
In ice-9/ports.scm:
433:17 14 (call-with-input-file _ _ #:binary _ #:encoding _ #:guess-enco=
ding _)
In gash/gash.scm:
121:27 13 (_ _)
In gash/repl.scm:
38:14 12 (run-repl _ _)
In gash/environment.scm:
375:8 11 (call-with-break _)
In srfi/srfi-1.scm:
634:9 10 (for-each #<procedure 7f8e75612420 at gash/shell.scm:401:18 (v=
alue)> _)
In gash/environment.scm:
357:8 9 (call-with-continue _)
In srfi/srfi-1.scm:
634:9 8 (for-each #<procedure eval-sh (exp)> _)
634:9 7 (for-each #<procedure eval-sh (exp)> _)
In gash/shell.scm:
55:39 6 (sh:and _ #<procedure 7f8e75656da0 at gash/eval.scm:149:6 ()>)
245:24 5 (_)
159:10 4 (sh:exec-let _ "expr" . _)
92:9 3 (exec-utility _ "/run/current-system/profile/bin/expr" "expr" =
("xliba=E2=80=A6" =E2=80=A6))
In srfi/srfi-1.scm:
634:9 2 (for-each #<procedure 7f8e760654c0 at gash/shell.scm:70:12 (i)=
> _)
In ice-9/ports.scm:
317:17 1 (dup->port _ _ _)
In unknown file:
0 (fdopen 6 "w0")
ERROR: In procedure fdopen:
In procedure scm_fdes_to_port: Bad file descriptor
--8<---------------cut here---------------end--------------->8---
Enough backtraces for now. To be continued=E2=80=A6
Ludo=E2=80=99.
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Subject: bug#75658: Non-deterministic Gash error in =?UTF-8?Q?=E2=80=98gcc-mesboot-4.9.4=E2=80=99?=
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Date: Fri, 14 Mar 2025 01:00:05 +0100
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Ludovic Court=C3=A8s <ludo@HIDDEN> skribis:
> In gash/shell.scm:
> 289: 9 [sh:substitute-command #<procedure 2da0f560 at gash/eval.scm:129:=
35 ()>]
> 270: 8 [%subshell #<procedure v ()>]
> In ice-9/boot-9.scm:
> 157: 7 [catch quit #<procedure v ()> ...]
> In ice-9/r4rs.scm:
> 176: 6 [with-output-to-port #<variable 2de5dc00 value: #<output: file /d=
ev/pts/19>> ...]
> In srfi/srfi-1.scm:
> 619: 5 [for-each #<procedure eval-sh (exp)> ((<sh-exec> "expr" # ":" ...=
))]
> In gash/shell.scm:
> 129: 4 [sh:exec-let () "expr" ...]
> 92: 3 [exec-utility () ...]
> In srfi/srfi-1.scm:
> 616: 2 [for-each #<procedure 2d60f0a0 at gash/shell.scm:70:12 (i)> (0 1 =
2 ...)]
> In ice-9/boot-9.scm:
> 1473: 1 [dup->port #<input: file /dev/pts/19> "r0" 7]
> In unknown file:
> ?: 0 [fdopen 7 "r0"]
>
> ERROR: In procedure fdopen:
> ERROR: In procedure scm_fdes_to_port: Bad file descriptor
I was able to capture an strace log of this:
--8<---------------cut here---------------start------------->8---
15837 clone(child_stack=3DNULL, flags=3DCLONE_CHILD_CLEARTID|CLONE_CHILD_SE=
TTID|SIGCHLD, child_tidptr=3D0x7fb10dad7850) =3D 15838
15838 set_robust_list(0x7fb10dad7860, 24) =3D 0
15837 wait4(15838, <unfinished ...>
15838 close(3) =3D 0
15838 close(4) =3D 0
15838 pipe2([3, 4], O_CLOEXEC) =3D 0
[...]
15838 clone3({flags=3DCLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THR=
EAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, ch=
ild_tid=3D0x7fb10beaa990, parent_tid=3D0x7fb10beaa990, exit_signal=3D0, sta=
ck=3D0x7fb10b51b000, stack_size=3D0x98ef80, tls=3D0x7fb10beaa6c0} =3D> {par=
ent_tid=3D[15839]}, 88) =3D 15839
15839 rseq(0x7fb10beaafe0, 0x20, 0, 0x53053053 <unfinished ...>
15838 rt_sigprocmask(SIG_SETMASK, [], <unfinished ...>
[...]
15838 lseek(2, 0, SEEK_CUR) =3D -1 ESPIPE (Illegal seek)
15839 close(10) =3D 0
15839 close(17 <unfinished ...>
15838 dup2(22, 6 <unfinished ...>
15839 <... close resumed>) =3D 0
15838 <... dup2 resumed>) =3D 6
15839 close(6 <unfinished ...>
15838 fcntl(6, F_GETFL <unfinished ...>
15839 <... close resumed>) =3D 0
15838 <... fcntl resumed>) =3D -1 EBADF (Bad file descriptor)
15839 close(7) =3D 0
15839 close(18) =3D 0
15839 close(15) =3D 0
15839 close(12) =3D 0
15839 close(9) =3D 0
15839 close(16) =3D 0
15838 write(2, "Backtrace:\n", 11) =3D 11
--8<---------------cut here---------------end--------------->8---
The sequence goes like this:
1. A child process (15837) corresponding to the subshell is created;
2. That process creates a finalization thread (15839);
3. Main thread does dup2(22, 6); finalization does close(6); main
thread does fcntl(6, F_GETFL), which fails with EBADF.
I suspect something like a wrong revealed count on the relevant ports,
possibly those created in =E2=80=98install-current-ports!=E2=80=99.
Ludo=E2=80=99.
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From: Timothy Sample <samplet@HIDDEN>
In-Reply-To: <871pv0wkfu.fsf@HIDDEN> ("Ludovic =?UTF-8?Q?Court=C3=A8s?="'s message of "Fri, 14 Mar 2025 01:00:05 +0100")
References: <87msfnsrli.fsf@HIDDEN> <87wmeqpspy.fsf@HIDDEN>
<87bju7i6rr.fsf@HIDDEN> <871pv0wkfu.fsf@HIDDEN>
Date: Fri, 14 Mar 2025 23:08:55 -0600
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Ludovic Court=C3=A8s <ludo@HIDDEN> writes:
> I was able to capture an strace log of this:
>
> 15837 clone(child_stack=3DNULL, flags=3DCLONE_CHILD_CLEARTID|CLONE_CHILD_=
SETTID|SIGCHLD, child_tidptr=3D0x7fb10dad7850) =3D 15838
> 15838 set_robust_list(0x7fb10dad7860, 24) =3D 0
> 15837 wait4(15838, <unfinished ...>
> 15838 close(3) =3D 0
> 15838 close(4) =3D 0
> 15838 pipe2([3, 4], O_CLOEXEC) =3D 0
> [...]
> 15838 clone3({flags=3DCLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_T=
HREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, =
child_tid=3D0x7fb10beaa990, parent_tid=3D0x7fb10beaa990, exit_signal=3D0, s=
tack=3D0x7fb10b51b000, stack_size=3D0x98ef80, tls=3D0x7fb10beaa6c0} =3D> {p=
arent_tid=3D[15839]}, 88) =3D 15839
> 15839 rseq(0x7fb10beaafe0, 0x20, 0, 0x53053053 <unfinished ...>
> 15838 rt_sigprocmask(SIG_SETMASK, [], <unfinished ...>
> [...]
> 15838 lseek(2, 0, SEEK_CUR) =3D -1 ESPIPE (Illegal seek)
> 15839 close(10) =3D 0
> 15839 close(17 <unfinished ...>
> 15838 dup2(22, 6 <unfinished ...>
> 15839 <... close resumed>) =3D 0
> 15838 <... dup2 resumed>) =3D 6
> 15839 close(6 <unfinished ...>
> 15838 fcntl(6, F_GETFL <unfinished ...>
> 15839 <... close resumed>) =3D 0
> 15838 <... fcntl resumed>) =3D -1 EBADF (Bad file descriptor)
> 15839 close(7) =3D 0
> 15839 close(18) =3D 0
> 15839 close(15) =3D 0
> 15839 close(12) =3D 0
> 15839 close(9) =3D 0
> 15839 close(16) =3D 0
> 15838 write(2, "Backtrace:\n", 11) =3D 11
>
> The sequence goes like this:
>
> 1. A child process (15837) corresponding to the subshell is created;
>
> 2. That process creates a finalization thread (15839);
>
> 3. Main thread does dup2(22, 6); finalization does close(6); main
> thread does fcntl(6, F_GETFL), which fails with EBADF.
>
> I suspect something like a wrong revealed count on the relevant ports,
> possibly those created in =E2=80=98install-current-ports!=E2=80=99.
In =E2=80=9Cboot-9.scm=E2=80=9D, we have
(define dup->port
(case-lambda
((port/fd mode)
(fdopen (dup->fdes port/fd) mode))
((port/fd mode new-fd)
(let ((port (fdopen (dup->fdes port/fd new-fd) mode)))
(set-port-revealed! port 1)
port))))
It looks like the system calls on the main thread correspond to this
code (which is called from =E2=80=98install-current-ports!=E2=80=99 via =E2=
=80=98dup=E2=80=99).
Specifically, =E2=80=98dup2=E2=80=99 is called from =E2=80=98dup->fdes=E2=
=80=99 and =E2=80=98fcntl=E2=80=99 is called
from =E2=80=98fdopen=E2=80=99.
The way that =E2=80=98dup->fdes=E2=80=99 works is that it first makes sure =
that no
existing port has the desired file descriptor (=E2=80=98scm_evict_ports=E2=
=80=99), and
then calls =E2=80=98dup2=E2=80=98. This should mean that the requested fil=
e descriptor
is up for grabs.
Here=E2=80=99s my guess as to what=E2=80=98s happening. For brevity let=E2=
=80=99s call the port
with file descriptor 6 =E2=80=9CP=E2=80=9D.
1. The GC runs, nullifying the entry for P in the port table (weak key
hash table), and queuing its finalizer.
2. The evict ports loop runs, missing P because it was nullified (see
=E2=80=98scm_internal_hash_fold=E2=80=99).
3. =E2=80=98dup2=E2=80=99 turns 22 to 6.
4. The finalizer for P runs, closing 6.
5. =E2=80=98fdopen=E2=80=99 calls =E2=80=98fcntl=E2=80=99 on 6, which res=
ults in EBADF.
And here=E2=80=99s a reproducer:
(let loop ()
(define fd #f)
(let ((P (open-input-file "/dev/null")))
;; Does not change the revealed count of P.
(set! fd (fileno P)))
(let ((port (open-input-file "/dev/null")))
(dup->port port "r" fd)
(close-port port)
(loop)))
This results in EBADF in seemingly exactly the same way. (I had to run
it a few times: sometimes it runs out of file descriptors first.) This
happens on bootstrap Guile (2.0.9) and modern Guile.
That=E2=80=99s all I have for now. I=E2=80=99m not sure how to avoid this =
without
resorting to calling =E2=80=9C(gc)=E2=80=9D to synchronously run the finali=
zers before
trying to mess with the file descriptors.
-- Tim
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From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@HIDDEN>
In-Reply-To: <87senex4m0.fsf@HIDDEN> (Timothy Sample's message of "Fri, 14
Mar 2025 23:08:55 -0600")
References: <87msfnsrli.fsf@HIDDEN> <87wmeqpspy.fsf@HIDDEN>
<87bju7i6rr.fsf@HIDDEN> <871pv0wkfu.fsf@HIDDEN>
<87senex4m0.fsf@HIDDEN>
Date: Sun, 16 Mar 2025 16:01:14 +0100
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Hello Timothy,
Thanks for chiming in.
Timothy Sample <samplet@HIDDEN> skribis:
> And here=E2=80=99s a reproducer:
>
> (let loop ()
> (define fd #f)
> (let ((P (open-input-file "/dev/null")))
> ;; Does not change the revealed count of P.
> (set! fd (fileno P)))
> (let ((port (open-input-file "/dev/null")))
> (dup->port port "r" fd)
> (close-port port)
> (loop)))
>
> This results in EBADF in seemingly exactly the same way. (I had to run
> it a few times: sometimes it runs out of file descriptors first.) This
> happens on bootstrap Guile (2.0.9) and modern Guile.
Nice reproducer; I fully agree with your analysis.
See3in that =E2=80=98install-current-ports!=E2=80=99 creates temporary port=
s (via =E2=80=98dup=E2=80=99)
for no reason since nobody captures their reference and they get GC=E2=80=
=99d
soon after, I rewrote it like this:
--8<---------------cut here---------------start------------->8---
(define (install-current-ports!)
"Install all current ports into their usual file descriptors. For
example, if @code{current-input-port} is a @code{file-port?}, make the
process file descriptor 0 refer to the file open for
@code{current-input-port}. If any current port is a @code{port?} but
not a @code{file-port?}, its corresponding file descriptor will refer
to @file{/dev/null}."
;; XXX: Input/output ports? Closing other FDs?
(for-each (lambda (i)
(gc) ;to trigger bugs
(let ((current-port (fd->current-port i)))
(match (current-port)
((? file-port? port)
(dup->fdes port i))
(#f #t))))
(iota *fd-count*)))
--8<---------------cut here---------------end--------------->8---
But this illustrates another problem: in the child process, right before
=E2=80=98execve=E2=80=99, the finalization thread may be restarted, in whic=
h case it
creates a new pipe.
In the example below, the finalization pipe is on FDs 9 and 7, but
=E2=80=98install-current-ports!=E2=80=99 blindly dups to FD 7, thereby clos=
ing one end
of the finalization pipe that was just created:
--8<---------------cut here---------------start------------->8---
23647 pipe2([7, 9], O_CLOEXEC) =3D 0
23647 rt_sigprocmask(SIG_BLOCK, ~[], [], 8) =3D 0
23647 clone3({flags=3DCLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THR=
EAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, ch=
ild_tid=3D0x7f84204b3990, parent_tid=3D0x7f84204b3990, exit_signal=3D0, sta=
ck=3D0x7f841fb24000, stack_size=3D0x98ef80, tls=3D0x7f84204b36c0} =3D> {par=
ent_tid=3D[23648]}, 88) =3D 23648
[=E2=80=A6]
23647 write(9, "\0", 1) =3D 1
23648 <... read resumed>"\0", 1) =3D 1
23648 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) =3D 0
23648 read(7, <unfinished ...>
23647 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=3D0, tv_nsec=3D358458=
39}) =3D 0
23647 dup2(12, 7) =3D 7
23647 fcntl(7, F_GETFL) =3D 0x8002 (flags O_RDWR|O_LARGEFIL=
E)
23647 lseek(7, 0, SEEK_CUR) =3D -1 ESPIPE (Illegal seek)
23647 dup2(12, 7) =3D 7
23647 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=3D0, tv_nsec=3D358993=
20}) =3D 0
23647 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) =3D 0
23647 madvise(0x7f842207c000, 12288, MADV_DONTNEED) =3D 0
23647 write(9, "\0", 1) =3D 1
23648 <... read resumed>"\0", 1) =3D 1
23648 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) =3D 0
23648 read(7, <unfinished ...>
23647 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=3D0, tv_nsec=3D395398=
30}) =3D 0
23647 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=3D0, tv_nsec=3D395559=
97}) =3D 0
23647 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) =3D 0
23647 madvise(0x7f842207c000, 12288, MADV_DONTNEED) =3D 0
23647 madvise(0x7f8421d74000, 8192, MADV_DONTNEED) =3D 0
23647 write(9, "\0", 1) =3D -1 EPIPE (Broken pipe)
23647 --- SIGPIPE {si_signo=3DSIGPIPE, si_code=3DSI_USER, si_pid=3D23647, s=
i_uid=3D1000} ---
--8<---------------cut here---------------end--------------->8---
After that dup2(12, 7) call, writing to the finalization pipe yields
SIGPIPE, which terminates the process (here it corresponds to a subshell
running =E2=80=98expr=E2=80=99).
Since we=E2=80=99re going to exec right after fork, we could turn off
finalization around =E2=80=98primitive-fork=E2=80=99 such that the child do=
esn=E2=80=99t attempt
to restart the finalization thread before exec. The Shepherd has code
like this:
--8<---------------cut here---------------start------------->8---
(define %set-automatic-finalization-enabled?!
;; When using a statically-linked Guile, for instance in the initrd, we
;; cannot resolve this symbol, but most of the time we don't need it
;; anyway. Thus, delay it.
(let ((proc (delay
(pointer->procedure int
(dynamic-func
"scm_set_automatic_finalization_enable=
d"
(dynamic-link))
(list int)))))
(lambda (enabled?)
"Switch on or off automatic finalization in a separate thread.
Turning finalization off shuts down the finalization thread as a side effec=
t."
(->bool ((force proc) (if enabled? 1 0))))))
(define-syntax-rule (without-automatic-finalization exp ...)
"Turn off automatic finalization within the dynamic extent of EXP."
(let ((enabled? #t))
(dynamic-wind
(lambda ()
(set! enabled? (%set-automatic-finalization-enabled?! #f)))
(lambda ()
exp ...)
(lambda ()
(%set-automatic-finalization-enabled?! enabled?)))))
--8<---------------cut here---------------end--------------->8---
Problem is, we cannot use the FFI on the statically-linked Guile.
We could implement fork+exec in C, but we don=E2=80=99t have a C compiler at
this early bootstrap stage.
Thoughts?
Ludo=E2=80=99.
X-Loop: help-debbugs@HIDDEN
Subject: bug#75658: Non-deterministic Gash error in =?UTF-8?Q?=E2=80=98gcc-mesboot-4.9.4=E2=80=99?=
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From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@HIDDEN>
In-Reply-To: <87wmcpnhol.fsf@HIDDEN> ("Ludovic =?UTF-8?Q?Court=C3=A8s?="'s message of "Sun, 16 Mar 2025 16:01:14 +0100")
References: <87msfnsrli.fsf@HIDDEN> <87wmeqpspy.fsf@HIDDEN>
<87bju7i6rr.fsf@HIDDEN> <871pv0wkfu.fsf@HIDDEN>
<87senex4m0.fsf@HIDDEN> <87wmcpnhol.fsf@HIDDEN>
Date: Sun, 16 Mar 2025 22:32:03 +0100
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--=-=-=
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Ludovic Court=C3=A8s <ludo@HIDDEN> skribis:
> But this illustrates another problem: in the child process, right before
> =E2=80=98execve=E2=80=99, the finalization thread may be restarted, in wh=
ich case it
> creates a new pipe.
>
> In the example below, the finalization pipe is on FDs 9 and 7, but
> =E2=80=98install-current-ports!=E2=80=99 blindly dups to FD 7, thereby cl=
osing one end
> of the finalization pipe that was just created:
The hack below addresses that (mostly) by reserving low-number file
descriptors before the signal and finalization threads create their
pipe. (In practice, we can only reserve FDs above 5; FDs 3 and 4 are
the =E2=80=9Csleep pipe=E2=80=9D I believe.)
It seems to be good enough though.
Thoughts?
Ludo=E2=80=99.
--=-=-=
Content-Type: text/x-patch
Content-Disposition: inline
diff --git a/gash/shell.scm b/gash/shell.scm
index 3611067..68e74e7 100644
--- a/gash/shell.scm
+++ b/gash/shell.scm
@@ -68,14 +68,13 @@ not a @code{file-port?}, its corresponding file descriptor will refer
to @file{/dev/null}."
;; XXX: Input/output ports? Closing other FDs?
(for-each (lambda (i)
- (match ((fd->current-port i))
- ((? file-port? port)
- (dup port i))
- ((? input-port? port)
- (dup (open-file "/dev/null" "r") i))
- ((? output-port? port)
- (dup (open-file "/dev/null" "w") i))
- (_ #t)))
+ (gc)
+ (let ((current-port (fd->current-port i)))
+ (match (current-port)
+ ((? file-port? port)
+ (let ((new (dup port i)))
+ (redirect-port port new)))
+ (#f #t))))
(iota *fd-count*)))
(define (exec-utility bindings path name args)
@@ -89,8 +88,14 @@ to @file{/dev/null}."
;; the buffer) produces its output.
(flush-all-ports)
(match (primitive-fork)
- (0 (install-current-ports!)
- (apply execle path utility-env name args))
+ (0
+ (dynamic-wind
+ (lambda ()
+ (install-current-ports!))
+ (lambda ()
+ (apply execle path utility-env name args))
+ (lambda ()
+ (primitive-exit 127))))
(pid (match-let (((pid . status) (waitpid pid)))
(set-status! (status:exit-val status)))))))
@@ -182,7 +187,10 @@ if it is our responsibility to close the port."
(define* (make-processed-redir fd target #:optional (open-flags 0))
(let ((port (match target
((? port?) target)
- ((? string?) (open target open-flags))
+ ((? string?)
+ (let ((port (open target open-flags)))
+ (set-port-revealed! port 10)
+ port))
;; TODO: Verify open-flags.
((? integer?) ((fd->current-port target)))
(#f #f))))
@@ -213,6 +221,7 @@ if it is our responsibility to close the port."
(make-processed-redir fd #f))
(('<< (? integer? fd) text)
(let ((port (tmpfile)))
+ (set-port-revealed! port 10)
(display text port)
(seek port 0 SEEK_SET)
(make-processed-redir fd port)))))
@@ -264,6 +273,7 @@ process."
(lambda () #t)
(lambda ()
(restore-signals)
+ (gc)
(set-atexit! #f)
;; We need to preserve the status given to 'exit', so we
;; catch the 'quit' key here.
diff --git a/scripts/gash.in b/scripts/gash.in
index f851c1d..57506ba 100644
--- a/scripts/gash.in
+++ b/scripts/gash.in
@@ -21,5 +21,13 @@
;;; along with Gash. If not, see <http://www.gnu.org/licenses/>.
(define (main args)
+ ;; Reserve file descriptors 5 to 12 (roughly) before the signal and
+ ;; finalization threads grab them so that a script willing to use
+ ;; them can do so without breaking Guile.
+ (let loop ((i 3))
+ (when (<= i 10)
+ (open-fdes "/dev/null" (logior O_RDONLY O_CLOEXEC))
+ (loop (+ i 1))))
+
(setenv "SHELL" ((compose canonicalize-path car command-line)))
- ((@ (gash gash) main) (command-line)))
+ ((module-ref (resolve-interface '(gash gash)) 'main) (command-line)))
--=-=-=--
X-Loop: help-debbugs@HIDDEN
Subject: bug#75658: [PATCH 0/4] Fixes for subshells and redirections
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Cc: Timothy Sample <samplet@HIDDEN>, Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@HIDDEN>, 75658 <at> debbugs.gnu.org, Jan Nieuwenhuizen <janneke@HIDDEN>
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From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@HIDDEN>
Date: Wed, 19 Mar 2025 22:20:29 +0100
Message-ID: <20250319212033.4643-1-ludo@HIDDEN>
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Hello,
This fixes issues reported at <https://issues.guix.gnu.org/75658>
and related I noticed while looking at the code.
Feedback welcome!
Thanks,
Ludo'.
Ludovic Courtès (4):
shell: Exit child process when ‘execle’ fails.
shell: Remove dead code in ‘install-current-ports!’.
shell: ‘install-current-ports!’ opens file descriptors, not ports.
Open low-numbered file descriptors for use by the shell.
gash/shell.scm | 29 +++++++++++++++++++++--------
scripts/gash.in | 14 +++++++++++++-
tests/exiting.org | 27 +++++++++++++++++++++++++++
3 files changed, 61 insertions(+), 9 deletions(-)
base-commit: ec9f0313190e380687da387b4207469a0a0a8cd8
--
2.48.1
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Subject: bug#75658: Non-deterministic Gash error in =?UTF-8?Q?=E2=80=98gcc-mesboot-4.9.4=E2=80=99?=
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--=-=-=
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Hello Timothy,
Ludovic Court=C3=A8s <ludo@HIDDEN> skribis:
> The hack below addresses that (mostly) by reserving low-number file
> descriptors before the signal and finalization threads create their
> pipe. (In practice, we can only reserve FDs above 5; FDs 3 and 4 are
> the =E2=80=9Csleep pipe=E2=80=9D I believe.)
I=E2=80=99ve just sent cleaned-up patches to gash-devel including this
fix/workaround.
It passes my tests, meaning that I cannot reproduce the original bug in
a timely fashion when running:
./pre-inst-env gash -c 'exec 2>/dev/null; while true; do echo $(sh --vers=
ion) > /dev/null; done'
or when running part of the GCC 4.9.4 =E2=80=98configure=E2=80=99 script in=
a loop
(attached is the helper script I used for that; not shown here is a
manual modification of said script so that it exits after =E2=80=9Cchecking=
for
a sed that does not truncate output=E2=80=9D, which was sufficient to repro=
duce
the bug, possibly after many iterations).
It would be great to cut a Gash release soonish as this bug has been
blocking the =E2=80=98core-packages-team=E2=80=99 branch for a while alread=
y.
Thanks,
Ludo=E2=80=99.
--=-=-=
Content-Type: text/plain
Content-Disposition: inline; filename=gash-redirect-EBADF-reproducer.sh
Content-Description: Helper script to reproduce the bug with GCC's configure script.
#!/bin/sh
set -x
export COLUMNS=200
#STRACE="strace -s 100 -f -o log.strace"
PATCH=--with-patch=gash=$PWD/gash-redirect-EBADF.patch
export SHELL=$(guix build gash $PATCH)/bin/gash
export CONFIG_SHELL=$SHELL
OPTIONS="--prefix=/wherever --disable-bootstrap --disable-decimal-float --disable-libatomic --disable-libcilkrts --disable-libgomp --disable-libitm --disable-libmudflap --disable-libquadmath --disable-libsanitizer --disable-libssp --disable-libvtv --disable-lto --disable-lto-plugin --disable-multilib --disable-plugin --disable-threads --enable-languages=c,c++ --enable-static --enable-shared --enable-threads=single --disable-libstdcxx-pch --disable-build-with-cxx"
cd /data/src/gcc-4.9.4
while $STRACE $SHELL -e ./configure $OPTIONS $OPTIONS $OPTIONS
do
grep fcntl.*EBADF log.strace && break
done
--=-=-=--
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Subject: bug#75658: [PATCH 0/4] Fixes for subshells and redirections
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Ludovic Court=C3=A8s <ludo@HIDDEN> skribis:
> shell: Exit child process when =E2=80=98execle=E2=80=99 fails.
> shell: Remove dead code in =E2=80=98install-current-ports!=E2=80=99.
> shell: =E2=80=98install-current-ports!=E2=80=99 opens file descriptors,=
not ports.
> Open low-numbered file descriptors for use by the shell.
For the record, I also built this series with Guile 2.0.9, by modifying
=E2=80=98guix.scm=E2=80=99 to refer to it instead of =E2=80=98guile-3.0=E2=
=80=99 and turning off tests
(since they require (srfi srfi-64), which 2.0.9 doesn=E2=80=99t have).
It appears to work fine and passes this test:
timeout 10m \
/gnu/store/3ylfablfwsdaapgk2y3x8yjchmapasxs-gash-0.3.0.6-f988cb-dirty/bin=
/gash -c 'exec 7>/dev/null; while true; do echo $(sh --version) > /dev/null=
; done'
Ludo=E2=80=99.
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Subject: bug#75658: [PATCH 0/4] Fixes for subshells and redirections
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Ludovic Court=C3=A8s writes:
Hi!
> This fixes issues reported at <https://issues.guix.gnu.org/75658>
> and related I noticed while looking at the code.
>
> Feedback welcome!
That's awesome, what a terrible puzzle that was!
I'm hoping Timothy finds the time to review/merge/release Gash. We
could carry these patches in Guix, but yeah.
Greetings,
Janneke
--=20
Janneke Nieuwenhuizen <janneke@HIDDEN> | GNU LilyPond https://LilyPond.org
Freelance IT https://www.JoyOfSource.com | Avatar=C2=AE https://AvatarAcade=
my.com
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From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@HIDDEN>
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"Thu, 27 Mar 2025 08:16:21 +0100")
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Date: Wed, 02 Apr 2025 16:28:46 +0200
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Hi there!
Janneke Nieuwenhuizen <janneke@HIDDEN> skribis:
> That's awesome, what a terrible puzzle that was!
>
> I'm hoping Timothy finds the time to review/merge/release Gash. We
> could carry these patches in Guix, but yeah.
Yup, it would be great if one of you could do that. :-)
Especially since =E2=80=98core-packages-team=E2=80=99 has been queued for a=
while now
and the latest attempts to evaluate the branch have all failed due to
this bug, as in <https://ci.guix.gnu.org/eval/2050457/log/raw> (I guess
we were lucky on the previous =E2=80=98core-updates=E2=80=99 cycle, or just=
retried
until it would eventually work!).
Cheers,
Ludo=E2=80=99.
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Subject: bug#75658: [PATCH 0/4] Fixes for subshells and redirections
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Hello comrades,
Ludovic Court=C3=A8s <ludo@HIDDEN> writes:
> This fixes issues reported at <https://issues.guix.gnu.org/75658>
> and related I noticed while looking at the code.
[...]
> shell: Exit child process when =E2=80=98execle=E2=80=99 fails.
> shell: Remove dead code in =E2=80=98install-current-ports!=E2=80=99.
> shell: =E2=80=98install-current-ports!=E2=80=99 opens file descriptors,=
not ports.
> Open low-numbered file descriptors for use by the shell.
Timothy, Janneke: could you review/apply these Gash patches and cut a
release? The =E2=80=98core-packages-team=E2=80=99 has been blocked on this=
issue for
months.
We cannot easily apply patches to the package definitions because
=E2=80=98patch=E2=80=99 isn=E2=80=99t available this early bootstrapping ph=
ase. So if there=E2=80=99s
no =E2=80=9Cofficial=E2=80=9D Gash release, we would have to host a copy so=
mewhere,
which is not ideal. But perhaps we can take that route if a Gash
release cannot be made by, say, May 5th?
Let me know what you think!
Ludo=E2=80=99.
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Subject: bug#75658: [PATCH 0/4] Fixes for subshells and redirections
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--=-=-=
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Hello,
"Ludovic Court=C3=A8s" <ludo@HIDDEN> writes:
> Timothy, Janneke: could you review/apply these Gash patches and cut a
> release? The =E2=80=98core-packages-team=E2=80=99 has been blocked on th=
is issue for
> months.
>
> We cannot easily apply patches to the package definitions because
> =E2=80=98patch=E2=80=99 isn=E2=80=99t available this early bootstrapping =
phase. So if there=E2=80=99s
> no =E2=80=9Cofficial=E2=80=9D Gash release, we would have to host a copy =
somewhere,
> which is not ideal. But perhaps we can take that route if a Gash
> release cannot be made by, say, May 5th?
I cloned the repo and pushed the branch here (I had to adjust
=E2=80=98tests/existing.org=E2=80=99 because the new test would fail in VPA=
TH builds, as
shown by =E2=80=98make distcheck=E2=80=99):
https://codeberg.org/civodul/gash/src/branch/EBADF-fixes
It tagged it as =E2=80=9C3.0.1=E2=80=9D. Feel free to eventually merge it.=
(In the
future, we should also make sure several people have commit rights to
the official repo.)
I verified with:
./pre-inst-env guix build -e '(@@ (gnu packages commencement) gcc-mesboot=
)'
(This took ~18h on a beefy machine!) The build log does not show any
funky backtrace during ./configure runs.
I pushed an update of the =E2=80=98gash=E2=80=99 package in commit
b4693b9d4e131a96e8491651914d6c47d7eca7af of =E2=80=98core-packages-team=E2=
=80=99.
So I think this unlocks the =E2=80=98core-packages-team=E2=80=99 branch.
Next up: rebasing on current =E2=80=98master=E2=80=99.
Ludo=E2=80=99.
--=-=-=
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Am Tue, May 06, 2025 at 10:26:11AM +0200 schrieb Ludovic Courtès:
> Next up: rebasing on current ‘master’.
I tried yesterday, but made a mistake (forgot to push the unrebased
branch as core-packages-team-old3 first). Then when reverting the rebase
and trying to push, I realised I could not push a branch without
compiling it first. And this took me one hour on my old two core
machine! Much of this was spent in PO4 and POXREF.
I will try again, but cannot say how many hours this will take...
Andreas
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In-Reply-To: <aBnKjmtULPj2kgSm@jurong> (Andreas Enge's message of "Tue, 6 May
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Hi,
Andreas Enge <andreas@HIDDEN> writes:
> I tried yesterday, but made a mistake (forgot to push the unrebased
> branch as core-packages-team-old3 first). Then when reverting the rebase
> and trying to push, I realised I could not push a branch without
> compiling it first. And this took me one hour on my old two core
> machine! Much of this was spent in PO4 and POXREF.
I don=E2=80=99t think you necessarily need to push the old branch first.
Anyhow, let me know if you need help (or support :-)).
Thanks,
Ludo=E2=80=99.
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Content preview: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@HIDDEN> writes: > Hi, > > Andreas
Enge <andreas@HIDDEN> writes: > >> I tried yesterday, but made a mistake
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Ludovic Court=C3=A8s <ludo@HIDDEN> writes:
> Hi,
>
> Andreas Enge <andreas@HIDDEN> writes:
>
>> I tried yesterday, but made a mistake (forgot to push the unrebased
>> branch as core-packages-team-old3 first). Then when reverting the rebase
>> and trying to push, I realised I could not push a branch without
>> compiling it first. And this took me one hour on my old two core
>> machine! Much of this was spent in PO4 and POXREF.
>
> I don=E2=80=99t think you necessarily need to push the old branch first.
>
> Anyhow, let me know if you need help (or support :-)).
on ci.guix:
building of `/gnu/store/nbb9svpwh2zzqx92xcjbpjznia2mwvbb-gcc-mesboot-4.9.4.=
drv' timed out after 21600 seconds
I think gcc-mesboot might be necessary to set larger timeout properties.
>
> Thanks,
> Ludo=E2=80=99.
--=-=-=
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Am Thu, May 08, 2025 at 05:36:17PM +0800 schrieb Z572:
> on ci.guix:
> building of `/gnu/store/nbb9svpwh2zzqx92xcjbpjznia2mwvbb-gcc-mesboot-4.9.4.drv' timed out after 21600 seconds
> I think gcc-mesboot might be necessary to set larger timeout properties.
My suspicion is rather that something is wrong. On my own machine (with
4 cores), I saw the same timeout, but after 3600s; previous iterations
went through without a problem.
QA also has trouble evaluating this branch, but with a test failure in
git-minimal:
https://data.qa.guix.gnu.org/job/9798
Andreas
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Content preview: Andreas Enge <andreas@HIDDEN> writes: > Am Thu, May 08, 2025
at 05:36:17PM +0800 schrieb Z572: >> on ci.guix: >> building of
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Content preview: Andreas Enge <andreas@HIDDEN> writes: > Am Thu, May 08, 2025
at 05:36:17PM +0800 schrieb Z572: >> on ci.guix: >> building of `/gnu/store/nbb9svpwh2zzqx92xcjbpjznia2mwvbb-gcc-mesboot-4.9.4.drv'
timed out after 21600 seconds >> I think gcc- [...]
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Content-Type: text/plain
Andreas Enge <andreas@HIDDEN> writes:
> Am Thu, May 08, 2025 at 05:36:17PM +0800 schrieb Z572:
>> on ci.guix:
>> building of `/gnu/store/nbb9svpwh2zzqx92xcjbpjznia2mwvbb-gcc-mesboot-4.9.4.drv' timed out after 21600 seconds
>> I think gcc-mesboot might be necessary to set larger timeout properties.
>
> My suspicion is rather that something is wrong. On my own machine (with
> 4 cores), I saw the same timeout, but after 3600s; previous iterations
> went through without a problem.
>
> QA also has trouble evaluating this branch, but with a test failure in
> git-minimal:
> https://data.qa.guix.gnu.org/job/9798
In fact, the python-minimal test failed.
Rolling back openssl to 3.0 can lead to successful compilation.
It is said that https://github.com/python/cpython/pull/127361 can fix
build with openssl 3.4, but my test was not successful.
I'm going to roll back openssl first.
>
> Andreas
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Andreas Enge <andreas@HIDDEN> writes:
> Am Thu, May 08, 2025 at 05:36:17PM +0800 schrieb Z572:
>> on ci.guix:
>> building of `/gnu/store/nbb9svpwh2zzqx92xcjbpjznia2mwvbb-gcc-mesboot-4.9=
.4.drv' timed out after 21600 seconds
>> I think gcc-mesboot might be necessary to set larger timeout properties.
>
> My suspicion is rather that something is wrong.
Yes, it looks like a problem with offloading on berlin: the build seems
to stall when offloaded to build machines.
I=E2=80=99ve started a =E2=80=98--no-offload=E2=80=99 build manually so we =
can at least move
forward.
Ludo=E2=80=99.
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Z572 <z572@HIDDEN> writes:
> I'm going to roll back openssl first.
BTW, I=E2=80=99d like to ungraft everything on this branch.
We should avoid touching packages like OpenSSL anyway since they are
outside the scope of =E2=80=98core-packages=E2=80=99 and doing so could cau=
se conflicts
with ungrafting etc.
Thanks,
Ludo=E2=80=99.
Received: (at control) by debbugs.gnu.org; 14 Jun 2025 13:50:53 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sat Jun 14 09:50:53 2025 Received: from localhost ([127.0.0.1]:37570 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1uQRHY-0005XZ-5P for submit <at> debbugs.gnu.org; Sat, 14 Jun 2025 09:50:52 -0400 Received: from hera.aquilenet.fr ([185.233.100.1]:33126) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from <andreas@HIDDEN>) id 1uQRHV-0005Wd-Ad for control <at> debbugs.gnu.org; Sat, 14 Jun 2025 09:50:49 -0400 Received: from localhost (localhost [127.0.0.1]) by hera.aquilenet.fr (Postfix) with ESMTP id 6696C378; Sat, 14 Jun 2025 15:50:43 +0200 (CEST) Authentication-Results: hera.aquilenet.fr; none X-Virus-Scanned: Debian amavis at hera.aquilenet.fr Received: from hera.aquilenet.fr ([127.0.0.1]) by localhost (hera.aquilenet.fr [127.0.0.1]) (amavis, port 10024) with ESMTP id Y90KMVsWf2wX; Sat, 14 Jun 2025 15:50:42 +0200 (CEST) Received: from jurong (176-179-191-150.abo.bbox.fr [176.179.191.150]) by hera.aquilenet.fr (Postfix) with ESMTPSA id 831DE416; Sat, 14 Jun 2025 15:50:42 +0200 (CEST) Date: Sat, 14 Jun 2025 15:50:41 +0200 From: Andreas Enge <andreas@HIDDEN> To: control <at> debbugs.gnu.org Subject: Unblock Message-ID: <aE1-MSPdv-Gw88uh@jurong> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Rspamd-Server: hera X-Rspamd-Queue-Id: 6696C378 X-Spamd-Result: default: False [-5.59 / 15.00]; NEURAL_HAM(-3.00)[-1.000]; BAYES_HAM(-2.99)[99.94%]; MID_RHS_NOT_FQDN(0.50)[]; MIME_GOOD(-0.10)[text/plain]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCPT_COUNT_ONE(0.00)[1]; TO_DN_NONE(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCVD_TLS_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; ARC_NA(0.00)[] X-Rspamd-Action: no action X-Spamd-Bar: ----- X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: control X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) unblock 75518 by 76311,76654,76640,75676,75658 thanks # unblock by closed bugs; this makes no practical difference, # but clarifies the situation
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