Sending files from Linux lldb to Windows lldb-server doesn't work

[yshui]

The server replies with a F-1,16, and lldb reacts with reporting "error: invalid argument".

This is because lldb-server uses _wsopen_s to open files on Windows. _wsopen_s rejects mode arguments that contain anything other than _S_IREAD | _S_IWRITE.

[llvmbot]

@llvm/issue-subscribers-lldb

[DavidSpickett]

Thanks for the report and the diagnosis. Can you show how to reproduce this? It's probably very simple but just so we're on the same page. Also if you have links to the docs for _wsopen_s that would be great.

Though Linux -> Windows is not something we test on the buildbots we'd be happy to fix this if it's pretty obviously wrong which it sounds like it is.

[DavidSpickett]

Patch by @yshui https://reviews.llvm.org/D156817.

[mstorsjo]

I guess this should be trivial enough to cherry-pick.

/cherry-pick 9a4b3fd

[llvmbot]

/branch llvm/llvm-project-release-prs/issue64313

[llvmbot]

/pull-request llvm/llvm-project-release-prs#667