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add wasm32-wasip2 support #1836

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add wasm32-wasip2 support #1836

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229e04b
add `wasm32-wasip2` support
dicej Oct 8, 2024
fae1ac4
add WASIp2 TODO comments
dicej Oct 10, 2024
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10 changes: 8 additions & 2 deletions Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -65,8 +65,13 @@ features = [
"Win32_System_WindowsProgramming", # General future used for various types/funcs
]

[target.'cfg(target_os = "wasi")'.dependencies]
[target.'cfg(all(target_os = "wasi", not(target_env = "p2")))'.dependencies]
wasi = "0.11.0"

[target.'cfg(all(target_os = "wasi", target_env = "p2"))'.dependencies]
wasi = "0.13.3"
Comment on lines +68 to +72
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Is this really the correct way to go about this? Only 0.11 supports p1?

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Looking at https://docs.rs/wasi/latest/wasi/
I would say yes, the last mention I see of p1 is on 0.11

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Correct; see https://docs.rs/wasi/latest/wasi/#wasi-today-and-wasi_snapshot_preview1


[target.'cfg(target_os = "wasi")'.dependencies]
libc = "0.2.159"

[dev-dependencies]
Expand All @@ -79,7 +84,8 @@ rustdoc-args = ["--cfg", "docsrs", "--generate-link-to-definition"]
targets = [
"aarch64-apple-ios",
"aarch64-linux-android",
"wasm32-wasi",
"wasm32-wasip1",
"wasm32-wasip2",
"x86_64-apple-darwin",
"x86_64-pc-windows-gnu",
"x86_64-pc-windows-msvc",
Expand Down
4 changes: 2 additions & 2 deletions src/io_source.rs
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Expand Up @@ -104,7 +104,7 @@ impl<T> DerefMut for IoSource<T> {
}
}

#[cfg(any(unix, target_os = "hermit"))]
#[cfg(any(unix, target_os = "hermit", all(target_os = "wasi", target_env = "p2")))]
impl<T> event::Source for IoSource<T>
where
T: AsRawFd,
Expand Down Expand Up @@ -175,7 +175,7 @@ where
}
}

#[cfg(target_os = "wasi")]
#[cfg(all(target_os = "wasi", not(target_env = "p2")))]
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Can we do this?

Suggested change
#[cfg(all(target_os = "wasi", not(target_env = "p2")))]
#[cfg(all(target_os = "wasi", target_env = "p1"))]

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The reason I did it that way is because not(target_env = "p2") is backwards compatible with rustc versions prior to the introduction of the wasm32-wasip2 target (i.e. all stable rustc versions as of this writing). See here for further discussion. It does mean we'll need to make changes when p3 becomes available, though. Happy to do whatever you think is best here.

impl<T> event::Source for IoSource<T>
where
T: AsRawFd,
Expand Down
6 changes: 3 additions & 3 deletions src/net/tcp/stream.rs
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Expand Up @@ -13,7 +13,7 @@ use std::os::windows::io::{
};

use crate::io_source::IoSource;
#[cfg(not(target_os = "wasi"))]
#[cfg(any(not(target_os = "wasi"), target_env = "p2"))]
use crate::sys::tcp::{connect, new_for_addr};
use crate::{event, Interest, Registry, Token};

Expand Down Expand Up @@ -87,10 +87,10 @@ impl TcpStream {
/// entries in the routing cache.
///
/// [write interest]: Interest::WRITABLE
#[cfg(not(target_os = "wasi"))]
#[cfg(any(not(target_os = "wasi"), target_env = "p2"))]
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Can you use not(all(...)) here?

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@dicej dicej Oct 10, 2024 •
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If you mean not(all(target_os = "wasi", target_env = "p1")) then the same rationale I gave above for not using target_env = "p1" applies. Again, though, happy to change it if we're not concerned about backwards rustc compatibility.

pub fn connect(addr: SocketAddr) -> io::Result<TcpStream> {
let socket = new_for_addr(addr)?;
#[cfg(any(unix, target_os = "hermit"))]
#[cfg(any(unix, target_os = "hermit", all(target_os = "wasi", target_env = "p2")))]
let stream = unsafe { TcpStream::from_raw_fd(socket) };
#[cfg(windows)]
let stream = unsafe { TcpStream::from_raw_socket(socket as _) };
Expand Down
1 change: 1 addition & 0 deletions src/sys/mod.rs
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Expand Up @@ -15,6 +15,7 @@
//! * `Waker`: see [`crate::Waker`].

cfg_os_poll! {
#[cfg(not(all(target_os = "wasi", target_env = "p2")))]
macro_rules! debug_detail {
(
$type: ident ($event_type: ty), $test: path,
Expand Down
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