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 /* { dg-skip-if "" { ! nonlocal_goto } } */
   7 /* Verify unwind info in presence of alloca.  */
   8
   9 #include <unwind.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12
  13 static _Unwind_Reason_Code
  14 force_unwind_stop (int version, _Unwind_Action actions,
  15                    _Unwind_Exception_Class exc_class,
  16                    struct _Unwind_Exception *exc_obj,
  17                    struct _Unwind_Context *context,
  18                    void *stop_parameter)
  19 {
  20   if (actions & _UA_END_OF_STACK)
  21     abort ();
  22   return _URC_NO_REASON;
  23 }
  24
  25 static void force_unwind (void)
  26 {
  27   struct _Unwind_Exception *exc = malloc (sizeof (*exc));
  28   memset (&exc->exception_class, 0, sizeof (exc->exception_class));
  29   exc->exception_cleanup = 0;
  30
  31 #ifndef __USING_SJLJ_EXCEPTIONS__
  32   _Unwind_ForcedUnwind (exc, force_unwind_stop, 0);
  33 #else
  34   _Unwind_SjLj_ForcedUnwind (exc, force_unwind_stop, 0);
  35 #endif
  36
  37   abort ();
  38 }
  39
  40 __attribute__((noinline))
  41 void foo (void *x __attribute__((unused)))
  42 {
  43   force_unwind ();
  44 }
  45
  46 __attribute__((noinline))
  47 int bar (unsigned int x)
  48 {
  49   void *y = __builtin_alloca (x);
  50   foo (y);
  51   return 1;
  52 }
  53
  54 static void handler (void *p __attribute__((unused)))
  55 {
  56   exit (0);
  57 }
  58
  59 __attribute__((noinline))
  60 static void doit ()
  61 {
  62   char dummy __attribute__((cleanup (handler)));
  63   bar (1024);
  64 }
  65
  66 int main ()
  67 {
  68   doit ();
  69   abort ();
  70 }