1 files changed, 30 insertions, 0 deletions
diff --git a/test/asan/TestCases/debug_mapping.cpp b/test/asan/TestCases/debug_mapping.cpp
new file mode 100644
index 000000000..40083f028
--- /dev/null
+++ b/test/asan/TestCases/debug_mapping.cpp
@@ -0,0 +1,30 @@
+// Checks that the debugging API returns correct shadow scale and offset.
+// RUN: %clangxx_asan -O %s -o %t
+// RUN: %env_asan_opts=verbosity=1 %run %t 2>&1 | FileCheck %s
+
+#include <sanitizer/asan_interface.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#if _WIN64
+#define PTR "%llx"
+#else
+#define PTR "%lx"
+#endif
+
+// printed because of verbosity=1
+// CHECK: SHADOW_SCALE: [[SCALE:[0-9]+]]
+// CHECK: SHADOW_OFFSET: [[OFFSET:0x[0-9a-f]+]]
+
+int main() {
+  size_t scale, offset;
+  __asan_get_shadow_mapping(&scale, &offset);
+
+  fprintf(stderr, "scale: %d\n", (int)scale);
+  fprintf(stderr, "offset: 0x" PTR "\n", (void*)offset);
+
+  // CHECK: scale: [[SCALE]]
+  // CHECK: offset: [[OFFSET]]
+
+  return 0;
+}