1 files changed, 39 insertions, 0 deletions
diff --git a/rust/pin-init/examples/big_struct_in_place.rs b/rust/pin-init/examples/big_struct_in_place.rs
new file mode 100644
index 000000000000..30d44a334ffd
--- /dev/null
+++ b/rust/pin-init/examples/big_struct_in_place.rs
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
+use pin_init::*;
+
+// Struct with size over 1GiB
+#[derive(Debug)]
+pub struct BigStruct {
+    buf: [u8; 1024 * 1024 * 1024],
+    a: u64,
+    b: u64,
+    c: u64,
+    d: u64,
+    managed_buf: ManagedBuf,
+}
+
+#[derive(Debug)]
+pub struct ManagedBuf {
+    buf: [u8; 1024 * 1024],
+}
+
+impl ManagedBuf {
+    pub fn new() -> impl Init<Self> {
+        init!(ManagedBuf { buf <- zeroed() })
+    }
+}
+
+fn main() {
+    // we want to initialize the struct in-place, otherwise we would get a stackoverflow
+    let buf: Box<BigStruct> = Box::init(init!(BigStruct {
+        buf <- zeroed(),
+        a: 7,
+        b: 186,
+        c: 7789,
+        d: 34,
+        managed_buf <- ManagedBuf::new(),
+    }))
+    .unwrap();
+    println!("{}", core::mem::size_of_val(&*buf));
+}