Validate native D3D12 HIP interop and isolate Windows mapped-view leak

tools/windows/probe_kernel.hip

@@ -7,3 +7,15 @@ extern "C" __attribute__((global)) void d4r_probe_pattern(
     if (i < count)
         output[i] = (i * 1664525u + seed) ^ 0xa5a55a5au;
 }
+
+extern "C" __attribute__((global)) void d4r_probe_interop(
+    unsigned int* shared, unsigned int count, unsigned int seed, unsigned int* errors)
+{
+    const unsigned int i = __builtin_amdgcn_workgroup_id_x() * 128u +
+                           __builtin_amdgcn_workitem_id_x();
+    if (i < count) {
+        const unsigned int expected = (i * 1664525u + seed) ^ 0xa5a55a5au;
+        if (shared[i] != expected) __atomic_fetch_add(errors, 1u, __ATOMIC_RELAXED);
+        shared[i] ^= 0x3579bdf1u;
+    }
+}