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1//2// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.3// See https://llvm.org/LICENSE.txt for license information.4// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception5 6//7// nullblockisa.m8// testObjects9//10// Created by Blaine Garst on 9/24/08.11//12// CONFIG rdar://624452013 14 15 16#include <stdio.h>17#include <stdlib.h>18#include <Block_private.h>19 20 21void check(void (^b)(void)) {22 struct _custom {23 struct Block_layout layout;24 struct Block_byref *innerp;25 } *custom = (struct _custom *)(void *)(b);26 //printf("block is at %p, size is %lx, inner is %p\n", (void *)b, Block_size(b), innerp);27 if (custom->innerp->isa != (void *)NULL) {28 printf("not a NULL __block isa\n");29 exit(1);30 }31 return;32}33 34int main(int argc, char *argv[]) {35 36 __block int i;37 38 check(^{ printf("%d\n", ++i); });39 printf("%s: success\n", argv[0]);40 return 0;41}42 43