Add tests for memcpy overflow/underflow

1 files changed, 15 insertions, 0 deletions

diff --git a/tests/test_memcpy_overwrite_under.c b/tests/test_memcpy_overwrite_under.c
new file mode 100644
index 0000000..0811fea
--- /dev/null
+++ b/tests/test_memcpy_overwrite_under.c
@@ -0,0 +1,15 @@
+#include "common.h"
+
+#include <string.h>
+
+int main(int argc, char** argv) {
+  char buffer[9] = {'A', 'A', 'A', 'A', 'B', 'B', 'B', 'B', '\0'};
+  puts(buffer);
+
+  CHK_FAIL_START
+  memcpy(buffer-1, buffer, 5);
+  CHK_FAIL_END
+
+  puts(buffer);
+  return ret;
+}