1 files changed, 21 insertions, 0 deletions
diff --git a/src/test/ui/allocator/auxiliary/custom.rs b/src/test/ui/allocator/auxiliary/custom.rs
new file mode 100644
index 000000000..b0ec9ab09
--- /dev/null
+++ b/src/test/ui/allocator/auxiliary/custom.rs
@@ -0,0 +1,21 @@
+// no-prefer-dynamic
+
+#![feature(allocator_api)]
+#![crate_type = "rlib"]
+
+use std::alloc::{GlobalAlloc, System, Layout};
+use std::sync::atomic::{AtomicUsize, Ordering};
+
+pub struct A(pub AtomicUsize);
+
+unsafe impl GlobalAlloc for A {
+    unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
+        self.0.fetch_add(1, Ordering::SeqCst);
+        System.alloc(layout)
+    }
+
+    unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout) {
+        self.0.fetch_add(1, Ordering::SeqCst);
+        System.dealloc(ptr, layout)
+    }
+}