file-length wraps around at 4 GB on linux-arm64

[Yan]

For a 5 GB file, file-length should return 5 GB, but returns 1 GB.

To test, create (sparse) 5 GB file:
dd if=/dev/null bs=1 seek=5G count=1 of=5gbfile

stat -c %s 5gbfile
5368709120

./run-sbcl.sh --no-userinit --eval '(print (with-open-file (f "5gbfile") (file-length f)))' --quit
1073741824

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Tested with
sbcl-2.2.9 - 11
sbcl-2.3.0 - 2
sbcl-2.3.2-48-gbc7150b89

Raspberry PI 4
Linux 4.19.108-v8+ #1298 SMP PREEMPT Fri Mar 6 18:15:51 GMT 2020 aarch64 GNU/Linux

Android
Linux localhost 4.4.148-perf+ #1 SMP PREEMPT Tue Sep 3 19:28:08 2019 aarch64 Android

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Note: It works fine on x86-64

[Yan (metayan)]

Thanks for the quick fix.

[Yan (metayan)]

How complicated would it be to tweak a running instance?

[Stas Boukarev (stassats)]

Impossible.

[Yan (metayan)]

Yeah, I started looking into it, and that's also what I came up with, but thought I'd better ask if there was something I was missing.
Thanks again.

[Yan (metayan)]

Would you consider it safe to cherry-pick a8266873759aabfb195d542428dde8d0f53a25e6 into sbcl-2.3.2 as a solution until 2.3.3 is released?

[Stas Boukarev (stassats)]

Yes.

[Yan (metayan)]

Works great. Thanks.