gcc/testsuite/gcc.dg/stack-check-7.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2 -fstack-clash-protection -fno-optimize-sibling-calls --param stack-clash-protection-probe-interval=12 --param stack-clash-protection-guard-size=12" } */
   3 /* { dg-require-effective-target supports_stack_clash_protection } */
   4
   5 /* For further testing, this can be run under valgrind where it's crashed
   6    on aarch64 and ppc64le with -fstack-check=specific.  */
   7
   8
   9 __attribute__((noinline, noclone)) void
  10 foo (char *p)
  11 {
  12   asm volatile ("" : : "r" (p) : "memory");
  13 }
  14
  15 __attribute__((noinline, noclone)) void
  16 bar (void)
  17 {
  18   char buf[131072];
  19   foo (buf);
  20 }
  21
  22 __attribute__((noinline, noclone)) void
  23 baz (void)
  24 {
  25   char buf[12000];
  26   foo (buf);
  27 }
  28
  29 int
  30 main ()
  31 {
  32   bar ();
  33   baz ();
  34   return 0;
  35 }
  36