--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/analyzer/cstdlib.C	Mon May 25 07:50:57 2020 +0900
@@ -0,0 +1,17 @@
+#include <cstdlib>
+
+void test_1 (void *ptr)
+{
+  std::free (ptr); /* { dg-message "first 'free' here" } */
+  std::free (ptr); /* { dg-warning "double-'free' of 'ptr'" } */
+}
+
+void test_2 (void)
+{
+  void *p = std::malloc (1024); /* { dg-message "allocated here" } */
+} /* { dg-warning "leak of 'p'" } */
+
+void test_3 (void)
+{
+  void *p = std::calloc (42, 1024); /* { dg-message "allocated here" } */
+} /* { dg-warning "leak of 'p'" } */