compiler-rt/test/BlocksRuntime/nullblockisa.c

   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