[llvm-dev] Interpreter crash due to an "Unknown constant pointer type!"

[Alberto Barbaro via llvm-dev]

Hi David,
Thanks for the suggestions. I can definitely provide the example bc file
and image ( please see the attachments ). For the debug + asserts I need a
bit of more time.

Anyway the full output of lli is:

lli --force-interpreter examples/pngpixel_crash.bc 0 0 examples/mini.png
png_ptr->width: 1
max_pixel_depth: 24
row_bytes: 28
Unknown constant pointer type!
UNREACHABLE executed at
/home/al/Desktop/llvm-6.0.1.src/lib/ExecutionEngine/ExecutionEngine.cpp:1007!
LLVMSymbolizer: error reading file: No such file or directory
#0 0x0000000001765ee9 (lli+0x1765ee9)
#1 0x0000000001766099 (lli+0x1766099)
#2 0x0000000001764643 (lli+0x1764643)
#3 0x0000000001766424 (lli+0x1766424)
#4 0x00007f5dc5fc7890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
#5 0x00007f5dc4a85e97 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x3ee97)
#6 0x00007f5dc4a87801 abort (/lib/x86_64-linux-gnu/libc.so.6+0x40801)
#7 0x00000000016d7150 (lli+0x16d7150)
#8 0x0000000001139543 (lli+0x1139543)
#9 0x00000000011500b8 (lli+0x11500b8)
#10 0x000000000115c25d (lli+0x115c25d)
#11 0x0000000001167d32 (lli+0x1167d32)
#12 0x000000000116430d (lli+0x116430d)
#13 0x0000000001163580 (lli+0x1163580)
#14 0x000000000114e197 (lli+0x114e197)
#15 0x0000000001135ba0 (lli+0x1135ba0)
#16 0x00000000008c729d (lli+0x8c729d)
#17 0x00007f5dc4a68b97 __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x21b97)
#18 0x00000000008c4f1a (lli+0x8c4f1a)
Stack dump:
0. Program arguments: lli --force-interpreter examples/pngpixel_crash.bc 0
0 examples/mini.png
[1]    4344 abort (core dumped)  lli --force-interpreter
examples/pngpixel_crash.bc 0 0 examples/mini.png

Please let me know if you can reproduce it!!

Thanks
Alberto


On Thu, Dec 19, 2019, 19:10 David Blaikie <dblaikie at gmail.com> wrote:

> Probably need a debug (& probably +Asserts) build to see more about
> where it's failing & that might help you fix it - if you want other folks
> to be able to help debug the issue, providing the full reproduction steps
> (the entire input files, what commands were run, etc) - though, preferably,
> minimized (simplify the inputs/commands, etc, while still producing the
> failure)
>
> On Thu, Dec 19, 2019 at 11:06 AM Alberto Barbaro via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
>
>> Hi all,
>> as usual I'm playing with the Interpreter and unfortunately I hit a
>> crash. I have narrowed down the problem an the crash happens inside the
>> inflate function which is part of zlib and specifically at the instruction:
>>
>> store <2 x %struct.code*> <%struct.code* getelementptr inbounds ([512 x
>> %struct.code], [512 x %struct.code]* @fixedtables.lenfix.681, i64 0, i64
>> 0), %struct.code* getelementptr inbounds ([32 x %struct.code], [32 x
>> %struct.code]* @fixedtables.distfix.682, i64 0, i64 0)>, <2 x
>> %struct.code*>* %96, align 8, !tbaa !46
>>
>> The output from lli is:
>>
>> Unknown constant pointer type!
>> UNREACHABLE executed at
>> /home/al/Desktop/llvm-6.0.1.src/lib/ExecutionEngine/ExecutionEngine.cpp:1007!
>> LLVMSymbolizer: error reading file: No such file or directory
>> #0 0x0000000001765ee9 (lli+0x1765ee9)
>> #1 0x0000000001766099 (lli+0x1766099)
>> #2 0x0000000001764643 (lli+0x1764643)
>> #3 0x0000000001766424 (lli+0x1766424)
>> #4 0x00007faade157890 __restore_rt
>> (/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
>> #5 0x00007faadcc15e97 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x3ee97)
>> #6 0x00007faadcc17801 abort (/lib/x86_64-linux-gnu/libc.so.6+0x40801)
>> #7 0x00000000016d7150 (lli+0x16d7150)
>> #8 0x0000000001139543 (lli+0x1139543)
>> #9 0x00000000011500b8 (lli+0x11500b8)
>> #10 0x000000000115c25d (lli+0x115c25d)
>> #11 0x0000000001167d32 (lli+0x1167d32)
>> #12 0x000000000116430d (lli+0x116430d)
>> #13 0x0000000001163580 (lli+0x1163580)
>> #14 0x000000000114e197 (lli+0x114e197)
>> #15 0x0000000001135ba0 (lli+0x1135ba0)
>> #16 0x00000000008c729d (lli+0x8c729d)
>> #17 0x00007faadcbf8b97 __libc_start_main
>> (/lib/x86_64-linux-gnu/libc.so.6+0x21b97)
>> #18 0x00000000008c4f1a (lli+0x8c4f1a)
>>
>> Is there anyone that can help me to understand how to fix it even a
>> simple workaround for the moment would be enough!
>>
>> Thanks,
>> Alberto
>> _______________________________________________
>> LLVM Developers mailing list
>> llvm-dev at lists.llvm.org
>> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>
>
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