Extend malloc function hiding to tst-memaling-2 and tst-reallocarray (BZ #32366)

Add "tst-malloc-aux.h" on tst-memalign-2.c and extend the mechanism
to handle reallocarray as well (clang-20 also optimize-out
reallocarray).

malloc/tst-malloc-aux.h

@@ -34,6 +34,7 @@ static __typeof (posix_memalign) * volatile posix_memalign_indirect
 static __typeof (pvalloc) * volatile pvalloc_indirect = pvalloc;
 static __typeof (realloc) * volatile realloc_indirect = realloc;
 static __typeof (valloc) * volatile valloc_indirect = valloc;
+static __typeof (reallocarray) * volatile reallocarray_indirect = reallocarray;
 
 #undef aligned_alloc
 #undef calloc
@@ -43,6 +44,7 @@ static __typeof (valloc) * volatile valloc_indirect = valloc;
 #undef pvalloc
 #undef realloc
 #undef valloc
+#undef reallocarray
 
 #define aligned_alloc aligned_alloc_indirect
 #define calloc calloc_indirect
@@ -52,5 +54,6 @@ static __typeof (valloc) * volatile valloc_indirect = valloc;
 #define pvalloc pvalloc_indirect
 #define realloc realloc_indirect
 #define valloc valloc_indirect
+#define reallocarray reallocarray_indirect
 
 #endif /* TST_MALLOC_AUX_H */

malloc/tst-memalign-2.c

@@ -25,6 +25,8 @@
 #include <libc-pointer-arith.h>
 #include <support/check.h>
 
+#include "tst-malloc-aux.h"
+
 typedef struct TestCase {
   size_t size;
   size_t alignment;

malloc/tst-memalign-3.c

@@ -27,6 +27,7 @@
 #include <support/check.h>
 #include <support/xthread.h>
 
+#include "tst-malloc-aux.h"
 
 typedef struct TestCase {
   size_t size;

malloc/tst-reallocarray.c

@@ -22,6 +22,8 @@
 #include <support/check.h>
 #include <libc-diag.h>
 
+#include "tst-malloc-aux.h"
+
 static void *
 reallocarray_nowarn (void *ptr, size_t nmemb, size_t size)
 {