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-exception
5 
6 //
7 //  nullblockisa.m
8 //  testObjects
9 //
10 //  Created by Blaine Garst on 9/24/08.
11 //
12 // CONFIG rdar://6244520
13 
14 
15 
16 #include <stdio.h>
17 #include <stdlib.h>
18 #include <Block_private.h>
19 
20 
21 void 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 
34 int 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