1 files changed, 13 insertions, 0 deletions
diff --git a/lib/asan/lit_tests/TestCases/huge_negative_hea_oob.cc b/lib/asan/lit_tests/TestCases/huge_negative_hea_oob.cc
new file mode 100644
index 000000000000..58a44c5fb68e
--- /dev/null
+++ b/lib/asan/lit_tests/TestCases/huge_negative_hea_oob.cc
@@ -0,0 +1,13 @@
+// RUN: %clangxx_asan %s -o %t && not %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O %s -o %t && not %t 2>&1 | FileCheck %s
+// Check that we can find huge buffer overflows to the left.
+#include <stdlib.h>
+#include <string.h>
+int main(int argc, char **argv) {
+  char *x = (char*)malloc(1 << 20);
+  memset(x, 0, 10);
+  int res = x[-argc * 4000];  // BOOOM
+  // CHECK: is located 4000 bytes to the left of
+  free(x);
+  return res;
+}