1 files changed, 21 insertions, 0 deletions
diff --git a/lib/dfsan/lit_tests/basic.c b/lib/dfsan/lit_tests/basic.c
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index 0000000000000..b566c9271d0b4
--- /dev/null
+++ b/lib/dfsan/lit_tests/basic.c
@@ -0,0 +1,21 @@
+// RUN: %clang_dfsan -m64 %s -o %t && %t
+// RUN: %clang_dfsan -mllvm -dfsan-args-abi -m64 %s -o %t && %t
+
+// Tests that labels are propagated through loads and stores.
+
+#include <sanitizer/dfsan_interface.h>
+#include <assert.h>
+
+int main(void) {
+  int i = 1;
+  dfsan_label i_label = dfsan_create_label("i", 0);
+  dfsan_set_label(i_label, &i, sizeof(i));
+
+  dfsan_label new_label = dfsan_get_label(i);
+  assert(i_label == new_label);
+
+  dfsan_label read_label = dfsan_read_label(&i, sizeof(i));
+  assert(i_label == read_label);
+
+  return 0;
+}