[llvm-dev] LLD-linked binary segfaults at runtime on alpine linux

[Andrew Kelley via llvm-dev]

I created https://bugs.llvm.org/show_bug.cgi?id=36991

On Mon, Apr 2, 2018 at 3:04 PM, Andrew Kelley <superjoe30 at gmail.com> wrote:

> https://superjoe.s3.amazonaws.com/temp/repro.tar.xz
>
>
> On Mon, Apr 2, 2018 at 1:26 PM, Rui Ueyama <ruiu at google.com> wrote:
>
>> Can you add `--reproduce=repro` to lld command line? That generates
>> repro.tar in your current directory which contains all input files. And
>> then please compress and upload it somewhere so that we can take a look.
>>
>>
>> On Mon, Apr 2, 2018 at 9:18 AM Andrew Kelley via llvm-dev <
>> llvm-dev at lists.llvm.org> wrote:
>>
>>> Alpine linux is a distribution that uses musl libc instead glibc. Here
>>> are my steps to reproduce:
>>>
>>> On Alpine linux, download LLVM, Clang, LLD 6.0.0 from releases.llvm.org,
>>> and build them from source.
>>>
>>> $ clang -c hello_world.c
>>> $ ld.lld  --gc-sections -m elf_x86_64 -o hello_world
>>> /usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/../../../../lib/Scrt1.o
>>> /usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/../../../../lib/crti.o
>>> /usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/crtbegin.o -L
>>> /usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/../../../../lib -L
>>> /usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0 -dynamic-linker
>>> /lib/../lib/ld-musl-x86_64.so.1 hello_world.o -lgcc --as-needed -lgcc_s
>>> --no-as-needed -lc -lm -lgcc --as-needed -lgcc_s --no-as-needed
>>> /usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/crtend.o
>>> /usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/../../../../lib/crtn.o
>>> $ ./hello_world
>>> Segmentation fault (core dumped)
>>>
>>> Now try with binutils:
>>> $ ld  --gc-sections -m elf_x86_64 -o hello_world
>>> /usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/../../../../lib/Scrt1.o
>>> /usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/../../../../lib/crti.o
>>> /usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/crtbegin.o -L
>>> /usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/../../../../lib -L
>>> /usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0 -dynamic-linker
>>> /lib/../lib/ld-musl-x86_64.so.1 hello_world.o -lgcc --as-needed -lgcc_s
>>> --no-as-needed -lc -lm -lgcc --as-needed -lgcc_s --no-as-needed
>>> /usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/crtend.o
>>> /usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/../../../../lib/crtn.o
>>> $ ./hello_world
>>> Hello, World!
>>>
>>>
>>> Does the linker line look ok? Should I file a bug?
>>> _______________________________________________
>>> LLVM Developers mailing list
>>> llvm-dev at lists.llvm.org
>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>>
>>
>
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