Become a memory accounting amateur

userland/c/malloc_size.c

@@ -0,0 +1,26 @@
+/* https://cirosantilli.com/linux-kernel-module-cheat#malloc
+ *
+ * Malloc n bytes as given from the command line.
+ */
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char **argv) {
+    char *chars;
+    size_t nbytes;
+
+    if (argc < 2) {
+        nbytes = 2;
+    } else {
+        nbytes = strtoull(argv[1], NULL, 0);
+    }
+    chars = malloc(nbytes);
+    if (chars == NULL) {
+        perror("malloc");
+        exit(EXIT_FAILURE);
+    }
+    free(chars);
+    return EXIT_SUCCESS;
+}