Add an initial pass on an allocation tracing tool

tests/basic.rs

@@ -0,0 +1,44 @@
+extern crate qadapt;
+
+use qadapt::QADAPT;
+use std::alloc::alloc;
+use std::alloc::Layout;
+use std::sync::atomic::Ordering;
+
+#[global_allocator]
+static A: QADAPT = QADAPT::INIT;
+
+#[test]
+fn alloc_nonnull() {
+    unsafe {
+        assert!(!alloc(Layout::new::<u32>()).is_null())
+    }
+}
+
+struct Empty;
+
+struct NonEmpty {
+    _x: i32,
+    _y: i32
+}
+
+#[test]
+fn allocation_flag() {
+    A.clear_allocations();
+    assert!(!A.has_allocated.load(Ordering::SeqCst));
+
+    let _x = 24;
+    assert!(!A.has_allocated.load(Ordering::SeqCst));
+
+    let _x = Empty {};
+    assert!(!A.has_allocated.load(Ordering::SeqCst));
+
+    let _x = NonEmpty {
+        _x: 42,
+        _y: 84
+    };
+    assert!(!A.has_allocated.load(Ordering::SeqCst));
+
+    let _x = Box::new(42);
+    assert!(A.has_allocated.load(Ordering::SeqCst));
+}