add uninitialized allocator tests

test/simple-memory-corruption/Makefile

@@ -12,3 +12,6 @@ all: \
     invalid_free_protected \
     invalid_free_unprotected \
     invalid_free_small_region \
+    uninitialized_free \
+    uninitialized_realloc \
+    uninitialized_malloc_usable_size \

test/simple-memory-corruption/uninitialized_free.c

@@ -0,0 +1,7 @@
+#include <stdlib.h>
+
+__attribute__((optimize(0)))
+int main(void) {
+    free((void *)1);
+    return 0;
+}

test/simple-memory-corruption/uninitialized_malloc_usable_size.c

@@ -0,0 +1,7 @@
+#include <malloc.h>
+
+__attribute__((optimize(0)))
+int main(void) {
+    malloc_usable_size((void *)1);
+    return 0;
+}

test/simple-memory-corruption/uninitialized_realloc.c

@@ -0,0 +1,10 @@
+#include <stdlib.h>
+
+__attribute__((optimize(0)))
+int main(void) {
+    void *p = realloc((void *)1, 16);
+    if (!p) {
+        return 1;
+    }
+    return 0;
+}