feat: bring back test harness

Cargo.toml

@@ -1,5 +1,5 @@
 [workspace]
-members = ["kernel", "libs/*", "loader", "loader/api"]
+members = ["kernel", "libs/*", "loader", "loader/api", "libs/ktest/macros"]
 resolver = "2"
 
 [workspace.package]
@@ -101,6 +101,7 @@ wavltree = { path = "libs/wavltree" }
 loader-api = { path = "loader/api" }
 fdt = { path = "libs/fdt" }
 ksharded-slab = { path = "libs/ksharded-slab" }
+ktest = { path = "libs/ktest" }
 
 # third-party dependencies
 cfg-if = "1.0.0"
@@ -141,6 +142,11 @@ cranelift-frontend = { git = "https://github.com/JonasKruckenberg/wasmtime.git",
 cranelift-entity = { git = "https://github.com/JonasKruckenberg/wasmtime.git", branch = "main", default-features = false }
 wasmtime-slab = "28.0.1"
 
+# build dependencies
+proc-macro2 = "1"
+quote = "1"
+syn = { version = "2", features = ["full"] }
+
 [profile.release]
 debug = "limited" # The kernel should be able to print stack traces of itself even in release mode
 

kernel/Cargo.toml

@@ -23,6 +23,7 @@ wavltree = { workspace = true, features = ["dot"] }
 mpsc-queue.workspace = true
 fdt.workspace = true
 ksharded-slab.workspace = true
+ktest.workspace = true
 
 log.workspace = true
 cfg-if.workspace = true

kernel/src/main.rs

@@ -37,6 +37,8 @@ mod metrics;
 mod panic;
 mod scheduler;
 mod task;
+#[cfg(test)]
+mod tests;
 mod time;
 mod tracing;
 mod traps;
@@ -50,10 +52,10 @@ use crate::time::clock::Ticks;
 use crate::time::Instant;
 use crate::vm::bootstrap_alloc::BootstrapAllocator;
 use arrayvec::ArrayVec;
+use cfg_if::cfg_if;
 use core::cell::Cell;
 use core::range::Range;
 use core::slice;
-use core::time::Duration;
 use cpu_local::cpu_local;
 use loader_api::{BootInfo, LoaderConfig, MemoryRegionKind};
 use rand::SeedableRng;
@@ -144,52 +146,58 @@ fn _start(cpuid: usize, boot_info: &'static BootInfo, boot_ticks: u64) -> ! {
     tracing::per_cpu_init_late(Instant::from_ticks(Ticks(boot_ticks)));
 
     // initialize the executor
-    let sched = scheduler::init(boot_info.cpu_mask.count_ones() as usize);
+    let _sched = scheduler::init(boot_info.cpu_mask.count_ones() as usize);
 
     tracing::info!(
         "Booted in ~{:?} ({:?} in k23)",
         Instant::now().duration_since(Instant::ZERO),
         Instant::from_ticks(Ticks(boot_ticks)).elapsed()
     );
 
-    if cpuid == 0 {
-        sched.spawn(async move {
-            tracing::debug!("before timeout");
-            let start = Instant::now();
-            let res =
-                time::timeout(Duration::from_secs(1), time::sleep(Duration::from_secs(5))).await;
-            tracing::debug!("after timeout {res:?}");
-            assert!(res.is_err());
-            assert_eq!(start.elapsed().as_secs(), 1);
-
-            tracing::debug!("before timeout");
-            let start = Instant::now();
-            let res =
-                time::timeout(Duration::from_secs(5), time::sleep(Duration::from_secs(1))).await;
-            tracing::debug!("after timeout {res:?}");
-            assert!(res.is_ok());
-            assert_eq!(start.elapsed().as_secs(), 1);
-
-            tracing::debug!("sleeping for 1 sec...");
-            let start = Instant::now();
-            time::sleep(Duration::from_secs(1)).await;
-            assert_eq!(start.elapsed().as_secs(), 1);
-            tracing::debug!("slept 1 sec! {:?}", start.elapsed());
-
-            // FIXME this is a quite terrible hack to get the scheduler to close in tests (otherwise
-            //  tests would run forever) we should find a proper way to shut down the scheduler when idle.
-            #[cfg(test)]
-            scheduler::scheduler().shutdown();
-        });
-
-        // scheduler::scheduler().spawn(async move {
-        //     tracing::debug!("Point A");
-        //     scheduler::yield_now().await;
-        //     tracing::debug!("Point B");
-        // });
+    cfg_if! {
+        if #[cfg(test)] {
+            let mut output = riscv::hio::HostStream::new_stderr();
+            tests::run_tests(&mut output, boot_info);
+        } else {
+            scheduler::Worker::new(_sched, cpuid, &mut rng).run();
+        }
     }
 
-    scheduler::Worker::new(sched, cpuid, &mut rng).run();
+    // if cpuid == 0 {
+    //     sched.spawn(async move {
+    //         tracing::debug!("before timeout");
+    //         let start = Instant::now();
+    //         let res =
+    //             time::timeout(Duration::from_secs(1), time::sleep(Duration::from_secs(5))).await;
+    //         tracing::debug!("after timeout {res:?}");
+    //         assert!(res.is_err());
+    //         assert_eq!(start.elapsed().as_secs(), 1);
+    //
+    //         tracing::debug!("before timeout");
+    //         let start = Instant::now();
+    //         let res =
+    //             time::timeout(Duration::from_secs(5), time::sleep(Duration::from_secs(1))).await;
+    //         tracing::debug!("after timeout {res:?}");
+    //         assert!(res.is_ok());
+    //         assert_eq!(start.elapsed().as_secs(), 1);
+    //
+    //         tracing::debug!("sleeping for 1 sec...");
+    //         let start = Instant::now();
+    //         time::sleep(Duration::from_secs(1)).await;
+    //         assert_eq!(start.elapsed().as_secs(), 1);
+    //         tracing::debug!("slept 1 sec! {:?}", start.elapsed());
+    //
+    //
+    //         #[cfg(test)]
+    //         scheduler::scheduler().shutdown();
+    //     });
+    //
+    //     // scheduler::scheduler().spawn(async move {
+    //     //     tracing::debug!("Point A");
+    //     //     scheduler::yield_now().await;
+    //     //     tracing::debug!("Point B");
+    //     // });
+    // }
 
     // wasm::test();
 
@@ -272,4 +280,4 @@ fn locate_device_tree(boot_info: &BootInfo) -> (&'static [u8], Range<PhysicalAdd
         slice,
         Range::from(PhysicalAddress::new(fdt.range.start)..PhysicalAddress::new(fdt.range.end)),
     )
-}
+}

kernel/src/tests/args.rs

@@ -0,0 +1,60 @@
+// Copyright 2025 Jonas Kruckenberg
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use ktest::Test;
+
+#[derive(Default)]
+pub struct Arguments<'a> {
+    pub test_name: Option<&'a str>,
+    pub list: bool,
+    pub include_ignored: bool,
+    pub ignored: bool,
+    pub exact: bool,
+    pub format: FormatSetting,
+}
+
+#[derive(Default, Copy, Clone)]
+pub enum FormatSetting {
+    #[default]
+    Pretty,
+    Terse,
+    Json,
+}
+
+impl<'a> Arguments<'a> {
+    #[allow(clippy::should_implement_trait)]
+    pub fn from_str(str: &'a str) -> Self {
+        Self::parse(str.split_ascii_whitespace())
+    }
+
+    pub fn parse(mut iter: impl Iterator<Item = &'a str>) -> Self {
+        let mut out = Self::default();
+
+        while let Some(str) = iter.next() {
+            match str {
+                "--list" => out.list = true,
+                "--include-ignored" => out.include_ignored = true,
+                "--ignored" => out.ignored = true,
+                "--exact" => out.exact = true,
+                "--format" => match iter.next().unwrap() {
+                    "pretty" => out.format = FormatSetting::Pretty,
+                    "terse" => out.format = FormatSetting::Terse,
+                    "json" => out.format = FormatSetting::Json,
+                    _ => {}
+                },
+                _ => out.test_name = Some(str),
+            }
+        }
+
+        out
+    }
+
+    /// Returns `true` if the given test should be ignored.
+    pub fn is_ignored(&self, test: &Test) -> bool {
+        test.info.ignored && !self.ignored && !self.include_ignored
+    }
+}