Add cargo xtask miri

xtask/src/main.rs

@@ -7,6 +7,7 @@ use anyhow::Context;
 use pico_args::Arguments;
 
 mod cts;
+mod miri;
 mod run_wasm;
 mod test;
 mod util;
@@ -37,6 +38,14 @@ Commands:
 
     All extra arguments will be forwarded to cargo-nextest (NOT wgpu-info)
 
+  miri
+    Run all miri-compatible tests under miri. Requires a nightly toolchain
+    with the x86_64-unknown-linux-gnu target and miri component installed.
+
+    --toolchain <toolchain>   The toolchain to use for miri tests.
+                              Must be a nightly toolchain.
+                              Defaults to `nightly`.
+
   vendor-web-sys
     Re-vendor the WebGPU web-sys bindings.
 
@@ -85,6 +94,7 @@ fn main() -> anyhow::Result<ExitCode> {
     match subcommand.as_deref() {
         Some("cts") => cts::run_cts(shell, args)?,
         Some("run-wasm") => run_wasm::run_wasm(shell, args)?,
+        Some("miri") => miri::run_miri(shell, args)?,
         Some("test") => test::run_tests(shell, args)?,
         Some("vendor-web-sys") => vendor_web_sys::run_vendor_web_sys(shell, args)?,
         Some(subcommand) => {

xtask/src/miri.rs

@@ -0,0 +1,29 @@
+use pico_args::Arguments;
+use xshell::Shell;
+
+pub fn run_miri(shell: Shell, mut args: Arguments) -> anyhow::Result<()> {
+    let toolchain: String = args
+        .opt_value_from_str("--toolchain")?
+        .unwrap_or_else(|| String::from("nightly"));
+
+    shell
+        .cmd("rustup")
+        .args([
+            "run",
+            &toolchain,
+            "cargo",
+            "miri",
+            "nextest",
+            "run",
+            "--target",
+            "x86_64-unknown-linux-gnu",
+        ])
+        .env(
+            "MIRIFLAGS",
+            "-Zmiri-disable-isolation -Zmiri-deterministic-floats",
+        )
+        .quiet()
+        .run()?;
+
+    Ok(())
+}