Re: [scratch/igc] 985247b6bee crash on Linux, KDE, Wayland

[Eval EXEC <execvy@gmail.com>]

Pip Cet <pipcet@protonmail.com> writes:

> "Eval EXEC" <execvy@gmail.com> writes:
>
>> Eval EXEC <execvy@gmail.com> writes:
>>
>>> I recompiled commit 95a30325a84 (HEAD -> scratch/igc, origin/scratch/igc)
>>> * src/igc.c (fix_frame): Correct the previous change.
>>>
>>> After testing, I believe the issue has been resolved.
>>
>> scratch/igc 95a30325 crash again:
>>
>> I use latest scratch/igc commit: * 95a30325a84 - (HEAD -> scratch/igc, origin/scratch/igc) * src/igc.c (fix_frame): Fix last change. (8 hours ago) <Eli Zaretskii>
>>
>> build it by:
>>
>> #!/usr/bin/env bash
>> set -ex
>>
>> make extraclean
>>
>> BRANCH_NAME=$(git branch --show-current | sed 's/\//_/g')
>> COMMIT_ID=$(git rev-parse --short=8 HEAD)
>> BUILD_DIR=${BRANCH_NAME}-commit-${COMMIT_ID}
>> INSTALL_PREFIX=$(realpath ../emacs-build/${BUILD_DIR})
>>
>> ./autogen.sh
>> ./configure CFLAGS='-g3 -ggdb -O2 -fno-omit-frame-pointer -mtune=native -march=native' \
>>   --prefix=${INSTALL_PREFIX} \
>>   --with-mps=yes \
>>   --with-imagemagick  \
>>   --with-modules \
>>   --without-compress-install \
>>   --with-native-compilation  --with-mailutils\
>>   --enable-link-time-optimization \
>>   --with-tree-sitter --with-xinput2  \
>>   --with-dbus  --with-native-compilation=aot \
>>   --with-file-notification=inotify\
>>   && make -j30 install
>>
>> rm ../emacs-build/emacs
>> ln -s ${INSTALL_PREFIX} ../emacs-build/emacs
>
> Thanks, and sorry you're seeing so many crashes.  It's stable here, so
> we're going to need your help debugging this :-)

Thanks for the update. No problem. I'm really happy to debug with you all.
全世界 Emacs  用户联合起来， Make Emacs Great Again!

> Did you use any special options or patches when building mps (link time
> optimization or -O3, in particular)?

No special options or patches

> Could you please try (but please
> keep the core file and binary for this crash) rebuilding mps with "-g3
> -ggdb -O0" to see whether the problem is, maybe, mps rather than Emacs?
> That should also improve the debugging output, so please provide further
> crashes if they do happen with those options.

OK, I will rebuild mps and emacs with "-g3 -ggdb -O0" now

>> #9  0x0000000000690c05 in fix_lisp_obj (ss=ss@entry=0x7ffc7653e6f8, pobj=pobj@entry=0x7f08addd06b8) at /home/exec/Projects/git.savannah.gnu.org/git/emacs/src/igc.c:975
>
> This is the car of a cons cell, and it looks like it was freed by a
> previous garbage collection so it's no longer valid.
>
>>         off = <optimized out>
>>         client = <optimized out>
>>         base = 0x7f088a262a50
>
> Could you open the coredump again and run
>
> (gdb) x/32gx 0x7f088a262a00
It's:
(gdb) x/32gx 0x7f088a262a00
0x7f088a262a00: 0x00000000005a2a06      0x0000000000000000
0x7f088a262a10: 0x0000000322e4d00d      0x0000000000004c58
0x7f088a262a20: 0x0000000000000000      0x0000000322e4d10d
0x7f088a262a30: 0x00000000005a2a06      0x0000000000000000
0x7f088a262a40: 0x0000000322e4d20d      0x00000000005a2a0a
0x7f088a262a50: 0x0000000000000000      0x0000000322e4d30d
0x7f088a262a60: 0x0000000000004c58      0x0000000000000000
0x7f088a262a70: 0x0000000322e4d40d      0x00000000005a2a0a
0x7f088a262a80: 0x0000000000000000      0x0000000322e4d50d
0x7f088a262a90: 0x00000000005a2a0e      0x0000000000000000
0x7f088a262aa0: 0x0000000322e4d60d      0x0000000000004c58
0x7f088a262ab0: 0x0000000000000000      0x0000000322e4d70d
0x7f088a262ac0: 0x00000000005a2a0e      0x0000000000000000
0x7f088a262ad0: 0x0000000322e4d80d      0x00000000005a2a12
0x7f088a262ae0: 0x0000000000000000      0x0000000322e4d90d
0x7f088a262af0: 0x0000000000004c58      0x0000000000000000


> so we can get an idea of what was allocated around that time?
>
>>         res = <optimized out>
>>         new_off = <optimized out>
>>         p = 0x7f08addd06b8
>>         word = <optimized out>
>>         tag = <optimized out>
>>         _ss = 0x7ffc7653e6f8
>>         _mps_zs = <optimized out>
>>         _mps_ufs = 36029896530599944
>>         _mps_wt = <optimized out>
>>         _mps_w = <optimized out>
>> #10 0x00000000006919f8 in fix_cons (cons=0x7f08addd06b0, ss=0x7ffc7653e6f8) at /home/exec/Projects/git.savannah.gnu.org/git/emacs/src/igc.c:1751
>
> This is the cons cell itself (the IGC header is what "cons" points to).
>
> Please also run
>
> (gdb) x/64gx 0x7f08addd0600
It's 
(gdb) x/64gx 0x7f08addd0600
0x7f08addd0600: 0x00007f08addd063b      0x00000003df45210d
0x7f08addd0610: 0x0000000000000000      0x00007f08addd0653
0x7f08addd0620: 0x00000003df45240d      0x0000000000012638
0x7f08addd0630: 0x00007f08addd066b      0x00000003df44f80d
0x7f08addd0640: 0x0000000000000000      0x00007f08addd0683
0x7f08addd0650: 0x00000003df45220d      0x000000000000a5d0
0x7f08addd0660: 0x00007f08addd069b      0x00000003df45250d
0x7f08addd0670: 0x0000000000000038      0x00007f08addd06b3
0x7f08addd0680: 0x00000003df44f90d      0x000000000000a5d0
0x7f08addd0690: 0x00007f08addd06cb      0x00000003df45230d
0x7f08addd06a0: 0x00007f08addd06e3      0x0000000000000000
0x7f08addd06b0: 0x00000003df45260d      0x00007f0889546b70
0x7f08addd06c0: 0x00007f08936d87d3      0x00000003df44fa0d
0x7f08addd06d0: 0x00007f08936ceb33      0x0000000000000000
0x7f08addd06e0: 0x00000003df44e70d      0x0000000000001538
0x7f08addd06f0: 0x00007f08936d8063      0x00007f089091ff80
0x7f08addd0700: 0x00007f08addd0963      0x0000000300000009
0x7f08addd0710: 0x00007f089091ff98      0x0000000000000000
0x7f08addd0720: 0x0000000300000009      0x00007f089091ffb0
0x7f08addd0730: 0x0000000000000000      0x0000000300000009
0x7f08addd0740: 0x00007f089091ffc8      0x00007f08addd0993
0x7f08addd0750: 0x0000000300000009      0x00007f089091ffe0
0x7f08addd0760: 0x00007f08addd09ab      0x0000000300000009
0x7f08addd0770: 0x00007f0890920000      0x0000000000000000
0x7f08addd0780: 0x0000000500000009      0x00007f08af841768
0x7f08addd0790: 0xffffffffffffffff      0x0000000000000000
0x7f08addd07a0: 0x00007f08addcd2e8      0x0000000300000009
0x7f08addd07b0: 0x00007f0890920018      0x00007f08addd09db
0x7f08addd07c0: 0x0000000300000009      0x00007f0890920030
0x7f08addd07d0: 0x00007f08addd09f3      0x0000000300000009
0x7f08addd07e0: 0x00007f0890920048      0x00007f08addd0a33
0x7f08addd07f0: 0x0000000500000009      0x00007f0890920060


Thanks,

Eval Exec
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