[libcxx-commits] [libcxx] [libcxx] [test] Add a test for the range of file offsets (PR #122798)

[Martin Storsjö via libcxx-commits]

mstorsjo wrote:

>From a previous CI run https://buildkite.com/llvm-project/libcxx-ci/builds/39993, I see that this test seems to fail on the `android-ndk-21-def-x86`, CC @rprichard. From the output log about where it failed, `Assertion failure: in_off == total_size - 20`, it would look to me like this is the same issue as on Windows, presumably affecting either all 32 bit versions of Android or targets that are old enough.

I'm also seeing one failure on AIX 32 bit, `Assertion failed: !ofs.fail()`, which would indicate that it failed to write the output file - either because it is out of diskspace, or because AIX 32 bit doesn't allow writing files that are >4 GB in size, CC @daltenty. Can you confirm whether this is expected to fail on 32 bit AIX, or whether it would be a flaky test (if the runner some times has less than 4 GB of space, but not always)?

https://github.com/llvm/llvm-project/pull/122798