build a stackwalker binary for arm64

[biancadanforth]

While trying to verify https://bugzilla.mozilla.org/show_bug.cgi?id=1888201 in Socorro stage by fetching/processing/inspecting a crash locally, I hit an error in make build[1]. Based on the error message, I believe I've hit docker/roadmap#384, since socorro-stackwalk builds a binary only for the x86_64-unknown-linux-gnu target (i.e. x86_64 architecture), but my dev machine is arm64. I am not sure what could have changed, as I successfully ran the local Socorro stack a month or so ago without issue[2].

I noticed that the rust-minidump project provides a binary for each release for Apple Silicon (arm64 architecture) among other platforms, so I thought I'd try to build a tar.gz for that and reference it in Socorro's set_up_stackwalker.sh to see if that gets make build to work.

This is a WIP to test that this approach works. Ideal state is that the bin/build_stackwalker.sh script produces binaries for multiple targets and all target binaries are published as part of a single GitHub Release, similar to the rust-minidump project's releases.

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[1]: rosetta error: failed to open elf at /lib64/ld-linux-x86-64.so.2 (or qemu-x86_64: Could not open '/lib64/ld-linux-x86-64.so.2': No such file or directory if I disable "Use Rosetta for x86_64/amd64 emulation on Apple Silicon" in Docker Desktop settings). After some research, I learned that /lib64/ld-linux-x86-64.so.2 is the dynamic linker specified by the binary, and it is for the x86-64 architecture.

[2]: I tried rolling back my Docker Desktop version a few versions back (well past when I remember things working), but I keep getting the same error. I also looked into rolling back my Rosetta version, but that installation is handled by my OS and not configurable AFAICT outside of rolling back my OS version.

[biancadanforth]

I talked to @relud , and they helped me figure out what the issue is here (thank you!).

The base image being built for the app in socorro is multi-platform. Because we don't explicitly specify the platform, it defaults to "the target platform of the build request". For me this is linux/arm64, while for everyone else who have Linux OS or Intel Macs, it's linux/amd64.

The correct fix is to explicitly specify the platform when pulling the base image. So I will open up PRs in all the crash ingestion repos to do this.

FWIW, my WIP solution here doesn't work as-is, as I am specifying the wrong target (Mac OS instead of Linux), which explains why even after I created this new tar.gz and pulled it down in Socorro to build and run the stackwalk binary, I was still getting an error in make build indicating the architectures didn't match: /tmp/set_up_stackwalker.sh: line 37: /stackwalk-rust/minidump-stackwalk: cannot execute binary file: Exec format error.