File: pr64242.c

package info (click to toggle)
gcc-arm-none-eabi 15%3A12.2.rel1-1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 959,712 kB
  • sloc: cpp: 3,275,382; ansic: 2,061,766; ada: 840,956; f90: 208,513; makefile: 76,132; asm: 73,433; xml: 50,448; exp: 34,146; sh: 32,436; objc: 15,637; fortran: 14,012; python: 11,991; pascal: 6,787; awk: 4,779; perl: 3,054; yacc: 338; ml: 285; lex: 201; haskell: 122
file content (37 lines) | stat: -rw-r--r-- 754 bytes parent folder | download | duplicates (4) 
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
37
 
/* { dg-require-effective-target indirect_jumps } */

extern void abort (void);

__attribute ((noinline)) void
broken_longjmp (void *p)
{
  void *buf[32];
  __builtin_memcpy (buf, p, 5 * sizeof (void*));
  __builtin_memset (p, 0, 5 * sizeof (void*));
  /* Corrupts stack pointer...  */
  __builtin_longjmp (buf, 1);
}

volatile int x = 0;
char *volatile p;
char *volatile q;

int
main ()
{
  void *buf[5];
  p = __builtin_alloca (x);
  q = __builtin_alloca (x);
  if (!__builtin_setjmp (buf))
    broken_longjmp (buf);

  /* Compute expected next alloca offset - some targets don't align properly
     and allocate too much.  */
  p = q + (q - p);

  /* Fails if stack pointer corrupted.  */
  if (p != __builtin_alloca (x))
    abort ();

  return 0;
}