Function repalloc_huge

src/backend/utils/mmgr/mcxt.c:1489–1517

* repalloc_huge * Adjust the size of a previously allocated chunk, permitting a large * value. The previous allocation need not have been "huge". */

 *		value.  The previous allocation need not have been "huge".
 */
void *
repalloc_huge(void *pointer, Size size)
{
	MemoryContext context = GetMemoryChunkContext(pointer);
	void	   *ret;

	if (!AllocHugeSizeIsValid(size))
		elog(ERROR, "invalid memory alloc request size %zu", size);

	AssertNotInCriticalSection(context);

	/* isReset must be false already */
	Assert(!context->isReset);

	ret = context->methods->realloc(context, pointer, size);
	if (unlikely(ret == NULL))
	{
		MemoryContextStats(TopMemoryContext);
		ereport(ERROR,
				(errcode(ERRCODE_OUT_OF_MEMORY),
				 errmsg("out of memory"),
				 errdetail("Failed on request of size %zu in memory context \"%s\".",
						   size, context->name)));
	}

	VALGRIND_MEMPOOL_CHANGE(context, pointer, ret, size);

	return ret;
}

/*
 * MemoryContextStrdup