File: pack-test-4.c

package info (click to toggle)
gcc-riscv64-unknown-elf 8.3.0.2019.08%2Bdfsg-1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 680,956 kB
  • sloc: ansic: 3,237,715; cpp: 896,882; ada: 772,854; f90: 144,254; asm: 68,788; makefile: 67,456; sh: 29,743; exp: 28,045; objc: 15,273; fortran: 11,885; python: 7,369; pascal: 5,375; awk: 3,725; perl: 2,872; yacc: 316; xml: 311; ml: 285; lex: 198; haskell: 122
file content (36 lines) | stat: -rw-r--r-- 506 bytes parent folder | download | duplicates (10) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
 
/* PR c/11885
   Bug: flag4 was allocated into the same byte as the other flags.
   { dg-options "" }
   { dg-do run } */

extern void abort (void);

typedef unsigned char uint8_t;

typedef struct {
    uint8_t flag1:2;
    uint8_t flag2:1;
    uint8_t flag3:1;
   
    uint8_t flag4;

} __attribute__ ((packed)) MyType;

int main (void)
{
  MyType a;
  MyType *b = &a;

  b->flag1 = 0;
  b->flag2 = 0;
  b->flag3 = 0;

  b->flag4 = 0;

  b->flag4++;
    
  if (b->flag1 != 0)
    abort ();

  return 0;
}