1 files changed, 52 insertions, 0 deletions
diff --git a/test/sys/test_uio.rs b/test/sys/test_uio.rs
index d805b3b3..57296938 100644
--- a/test/sys/test_uio.rs
+++ b/test/sys/test_uio.rs
@@ -190,3 +190,55 @@ fn test_preadv() {
     let all = buffers.concat();
     assert_eq!(all, expected);
 }
+
+#[test]
+#[cfg(target_os = "linux")]
+// FIXME: qemu-user doesn't implement process_vm_readv/writev on most arches
+#[cfg_attr(not(any(target_arch = "x86", target_arch = "x86_64")), ignore)]
+fn test_process_vm_readv() {
+    use nix::unistd::ForkResult::*;
+    use nix::sys::signal::*;
+    use nix::sys::wait::*;
+    use std::str;
+
+    #[allow(unused_variables)]
+    let m = ::FORK_MTX.lock().expect("Mutex got poisoned by another test");
+
+    // Pre-allocate memory in the child, since allocation isn't safe
+    // post-fork (~= async-signal-safe)
+    let mut vector = vec![1u8, 2, 3, 4, 5];
+
+    let (r, w) = pipe().unwrap();
+    match fork() {
+        Ok(Parent { child }) => {
+            close(w).unwrap();
+            // wait for child
+            read(r, &mut vec![0u8]).unwrap();
+            close(r).unwrap();
+
+            let ptr = vector.as_ptr() as usize;
+            let remote_iov = RemoteIoVec { base: ptr, len: 5 };
+            let mut buf = vec![0u8; 5];
+
+            let ret = process_vm_readv(child,
+                                       &[IoVec::from_mut_slice(&mut buf)],
+                                       &[remote_iov]);
+
+            kill(child, SIGTERM).unwrap();
+            waitpid(child, None).unwrap();
+
+            assert_eq!(Ok(5), ret);
+            assert_eq!(20u8, buf.iter().sum());
+        },
+        Ok(Child) => {
+            let _ = close(r);
+            for i in vector.iter_mut() {
+                *i += 1;
+            }
+            let _ = write(w, b"\0");
+            let _ = close(w);
+            loop { let _ = pause(); }
+        },
+        Err(_) => panic!("fork failed")
+    }
+}