gcc/testsuite/gcc.dg/cleanup-12.c

   1 /* PR middle-end/32758 */
   2 /* HP-UX libunwind.so doesn't provide _UA_END_OF_STACK */
   3 /* { dg-do run } */
   4 /* { dg-options "-O2 -fexceptions" } */
   5 /* { dg-skip-if "" { "ia64-*-hpux11.*" }  { "*" } { "" } } */
   6 /* Verify unwind info in presence of alloca.  */
   7
   8 #include <unwind.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11
  12 static _Unwind_Reason_Code
  13 force_unwind_stop (int version, _Unwind_Action actions,
  14                    _Unwind_Exception_Class exc_class,
  15                    struct _Unwind_Exception *exc_obj,
  16                    struct _Unwind_Context *context,
  17                    void *stop_parameter)
  18 {
  19   if (actions & _UA_END_OF_STACK)
  20     abort ();
  21   return _URC_NO_REASON;
  22 }
  23
  24 static void force_unwind (void)
  25 {
  26   struct _Unwind_Exception *exc = malloc (sizeof (*exc));
  27   memset (&exc->exception_class, 0, sizeof (exc->exception_class));
  28   exc->exception_cleanup = 0;
  29
  30 #ifndef __USING_SJLJ_EXCEPTIONS__
  31   _Unwind_ForcedUnwind (exc, force_unwind_stop, 0);
  32 #else
  33   _Unwind_SjLj_ForcedUnwind (exc, force_unwind_stop, 0);
  34 #endif
  35
  36   abort ();
  37 }
  38
  39 __attribute__((noinline))
  40 void foo (void *x __attribute__((unused)))
  41 {
  42   force_unwind ();
  43 }
  44
  45 __attribute__((noinline))
  46 int bar (unsigned int x)
  47 {
  48   void *y = __builtin_alloca (x);
  49   foo (y);
  50   return 1;
  51 }
  52
  53 static void handler (void *p __attribute__((unused)))
  54 {
  55   exit (0);
  56 }
  57
  58 __attribute__((noinline))
  59 static void doit ()
  60 {
  61   char dummy __attribute__((cleanup (handler)));
  62   bar (1024);
  63 }
  64
  65 int main ()
  66 {
  67   doit ();
  68   abort ();
  69 }