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

[Rui Ueyama via llvm-dev]

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
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20180402/61bae1fb/attachment.html>