llvm-project

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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//  nullblockisa.m
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//  testObjects
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//
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//  Created by Blaine Garst on 9/24/08.
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//
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// CONFIG rdar://6244520
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#include <stdio.h>
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#include <stdlib.h>
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#include <Block_private.h>
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void check(void (^b)(void)) {
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    struct _custom {
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        struct Block_layout layout;
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        struct Block_byref *innerp;
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    } *custom  = (struct _custom *)(void *)(b);
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    //printf("block is at %p, size is %lx, inner is %p\n", (void *)b, Block_size(b), innerp);
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    if (custom->innerp->isa != (void *)NULL) {
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        printf("not a NULL __block isa\n");
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        exit(1);
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    }
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    return;
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}
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int main(int argc, char *argv[]) {
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   __block int i;
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   check(^{ printf("%d\n", ++i); });
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   printf("%s: success\n", argv[0]);
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   return 0;
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}
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