wip

Author: alexcrichton

crates/fiber/src/lib.rs

@@ -438,4 +438,60 @@ mod tests {
         assert!(FiberStack::new(usize::MAX, true).is_err());
         assert!(FiberStack::new(usize::MAX, false).is_err());
     }
+
+    #[test]
+    fn cross_thread_fiber() {
+        let fiber = Fiber::<(), (), ()>::new(fiber_stack(1024 * 1024), move |_, s| {
+            s.suspend(());
+        })
+        .unwrap();
+        assert!(fiber.resume(()).is_err());
+        std::thread::spawn(move || {
+            assert!(fiber.resume(()).is_ok());
+        })
+        .join()
+        .unwrap();
+    }
+
+    #[test]
+    fn what() {
+        let a = 3;
+        let b = 3;
+        let a = &a as *const _ as usize;
+        let b = &b as *const _ as usize;
+        eprintln!();
+        eprintln!("pacia1716({a:#x}, {b:#x}) = {:#x}", pacia1716(a, b));
+        std::thread::scope(|s| {
+            s.spawn(move || {
+                eprintln!("pacia1716({a:#x}, {b:#x}) = {:#x}", pacia1716(a, b));
+            });
+        });
+        eprintln!("pacib1716({a:#x}, {b:#x}) = {:#x}", pacib1716(a, b));
+        std::thread::scope(|s| {
+            s.spawn(move || {
+                eprintln!("pacib1716({a:#x}, {b:#x}) = {:#x}", pacib1716(a, b));
+            });
+        });
+    }
+
+    fn pacia1716(mut r17: usize, r16: usize) -> usize {
+        unsafe {
+            core::arch::asm!(
+                "pacia1716\n",
+                inout("x17") r17,
+                in("x16") r16,
+            );
+            r17
+        }
+    }
+    fn pacib1716(mut r17: usize, r16: usize) -> usize {
+        unsafe {
+            core::arch::asm!(
+                "pacib1716\n",
+                inout("x17") r17,
+                in("x16") r16,
+            );
+            r17
+        }
+    }
 }