e70f73211d
* virtfs file: update cursor position on fd_read
If a handle is backed by InMemoryFile, fd_read (turned into
Handle::read_vectored) doesn't update the cursor position properly and
thus prevents the caller from detecting EOF.
* virtfs file: fd_{pread,pwrite}: update offset in iovec iteration
If multiple iovec's are supplied, fd_pread and fd_pwrite previously
access data at the same offset for each iovec.
This is the wasi-tests crate, which contains source code for the system-level WASI tests.
Building these tests requires that the wasm32-wasi target be installed.