1 files changed, 59 insertions, 0 deletions
diff --git a/tests/ui/allocator/custom.rs b/tests/ui/allocator/custom.rs
new file mode 100644
index 00000000000..10cbc23c427
--- /dev/null
+++ b/tests/ui/allocator/custom.rs
@@ -0,0 +1,59 @@
+// run-pass
+
+// aux-build:helper.rs
+// no-prefer-dynamic
+
+#![feature(allocator_api)]
+#![feature(slice_ptr_get)]
+
+extern crate helper;
+
+use std::alloc::{self, Allocator, Global, Layout, System};
+use std::sync::atomic::{AtomicUsize, Ordering};
+
+static HITS: AtomicUsize = AtomicUsize::new(0);
+
+struct A;
+
+unsafe impl alloc::GlobalAlloc for A {
+    unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
+        HITS.fetch_add(1, Ordering::SeqCst);
+        alloc::GlobalAlloc::alloc(&System, layout)
+    }
+
+    unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout) {
+        HITS.fetch_add(1, Ordering::SeqCst);
+        alloc::GlobalAlloc::dealloc(&System, ptr, layout)
+    }
+}
+
+#[global_allocator]
+static GLOBAL: A = A;
+
+fn main() {
+    println!("hello!");
+
+    let n = HITS.load(Ordering::SeqCst);
+    assert!(n > 0);
+    unsafe {
+        let layout = Layout::from_size_align(4, 2).unwrap();
+
+        let memory = Global.allocate(layout.clone()).unwrap();
+        helper::work_with(&memory);
+        assert_eq!(HITS.load(Ordering::SeqCst), n + 1);
+        Global.deallocate(memory.as_non_null_ptr(), layout);
+        assert_eq!(HITS.load(Ordering::SeqCst), n + 2);
+
+        let s = String::with_capacity(10);
+        helper::work_with(&s);
+        assert_eq!(HITS.load(Ordering::SeqCst), n + 3);
+        drop(s);
+        assert_eq!(HITS.load(Ordering::SeqCst), n + 4);
+
+        let memory = System.allocate(layout.clone()).unwrap();
+        helper::work_with(&memory);
+        assert_eq!(HITS.load(Ordering::SeqCst), n + 4);
+        System.deallocate(memory.as_non_null_ptr(), layout);
+        assert_eq!(HITS.load(Ordering::SeqCst), n + 4);
+    }
+}