Updates in preparation of wrapper script

runtime/szrt_asan.c

Index: runtime/szrt_asan.c
diff --git a/runtime/szrt_asan.c b/runtime/szrt_asan.c
index f8608bb4421945ab3b16b2a85df6535780a94479..449226b69bdc3dff023f416669838d9d9832854e 100644
--- a/runtime/szrt_asan.c
+++ b/runtime/szrt_asan.c
@@ -23,6 +23,7 @@
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <sys/mman.h>
 
 #define RZ_SIZE (32)
@@ -153,6 +154,13 @@ void *__asan_malloc(size_t size) {
   return ret;
 }
 
+void *__asan_calloc(size_t nmemb, size_t size) {
+  size_t alloc_size = nmemb * size;
+  void *ret = __asan_malloc(alloc_size);
+  memset(ret, 0, alloc_size);
+  return ret;
+}
+
 void __asan_free(char *ptr) {
   DUMP("free() called on %p\n", ptr);
   void *rz_left = ptr - RZ_SIZE;