[PATCH] tst-rec-dlopen: Use custom malloc instead of hooks

[Adhemerval Zanella]

LGTM with some comments:

On 10/05/2016 11:38, Florian Weimer wrote:

> +size_t
> +malloc_usable_size (void *ptr)
> +{
> +  struct chunk_header *chunk = ptr - sizeof (struct chunk_header);
> +  return chunk->chunk_size;
> +}
> +
> +void *
> +realloc (void *ptr, size_t size)
> +{
> +  size_t old_size = malloc_usable_size (ptr);
> +  size_t to_copy;
> +  if (old_size < size)
> +    to_copy = old_size;
> +  else
> +    to_copy = size;
> +  void *newptr = malloc_internal (size);
> +  if (newptr == NULL)
> +    return NULL;
> +  memcpy (newptr, ptr, to_copy);
> +  return newptr;
> +}
> +
> +void *
> +memalign (size_t alignment, size_t size)
> +{
> +  if (alignment > __alignof__ (struct chunk_header))
> +    {
> +      if (size < size + __alignof__ (struct chunk_header))
> +	return NULL;
> +      void *result = malloc_internal
> +	(size + __alignof__ (struct chunk_header));
> +      if (result == NULL)
> +	return NULL;
> +      uintptr_t bits = (uintptr_t) result;
> +      /* Round up to the next multiple of he alignment.  */
> +      bits += __alignof__ (struct chunk_header) - 1;
> +      bits &= ~(__alignof__ (struct chunk_header) - 1);
> +      result = (void *) bits;
> +      struct chunk_header *chunk = result - sizeof (struct chunk_header);
> +      chunk->chunk_size = size;
> +      return result;
> +    }
> +  return malloc_internal (size);
> +}
> 

Since the idea is simulate the hooks for malloc/free, do we still need to add
all this code to be used on this single test?