Initial commit

tests/01_malloc.c

@@ -0,0 +1,31 @@
+#define DEBUG
+#include <stdlib.h>
+#include <string.h>
+#include "../include/mem.h"
+int mem_is_zero(const void *ptr, size_t nbytes) {
+    assert(ptr);
+    assert(nbytes > 0);
+    static const unsigned char zero_block[1024] = {0}; 
+    while (nbytes >= sizeof(zero_block)) {
+        if (memcmp(ptr, zero_block, sizeof(zero_block)) != 0)
+            return 0;
+        ptr = (const unsigned char *)ptr + sizeof(zero_block);
+        nbytes -= sizeof(zero_block);
+    }
+    if (nbytes > 0 && memcmp(ptr, zero_block, nbytes) != 0)
+        return 0;
+    return 1;
+}
+
+int main(void){
+    size_t nbytes = 4096;
+    
+    void *tmp = malloc(nbytes);
+    memset(tmp, 0xAB, nbytes);
+    free(tmp);
+    
+    void *ptr = ALLOC(nbytes);  // likely gets the same region back
+    assert(!mem_is_zero(ptr, nbytes));  // FAILS — 0xAB still there
+    assert(ptr != NULL);
+    return EXIT_SUCCESS;
+}