shotgun/external_libs/libffi/testsuite/libffi.call/problem1.c

   1 /* Area:        ffi_call, closure_call
   2    Purpose:     Check structure passing with different structure size.
   3    Limitations: none.
   4    PR:          none.
   5    Originator:  <andreast@gcc.gnu.org> 20030828  */
   6
   7 /* { dg-do run } */
   8 #include "ffitest.h"
   9
  10 typedef struct my_ffi_struct {
  11   double a;
  12   double b;
  13   double c;
  14 } my_ffi_struct;
  15
  16 my_ffi_struct callee(struct my_ffi_struct a1, struct my_ffi_struct a2)
  17 {
  18   struct my_ffi_struct result;
  19   result.a = a1.a + a2.a;
  20   result.b = a1.b + a2.b;
  21   result.c = a1.c + a2.c;
  22
  23
  24   printf("%g %g %g %g %g %g: %g %g %g\n", a1.a, a1.b, a1.c,
  25          a2.a, a2.b, a2.c, result.a, result.b, result.c);
  26
  27   return result;
  28 }
  29
  30 void stub(ffi_cif* cif __UNUSED__, void* resp, void** args,
  31           void* userdata __UNUSED__)
  32 {
  33   struct my_ffi_struct a1;
  34   struct my_ffi_struct a2;
  35
  36   a1 = *(struct my_ffi_struct*)(args[0]);
  37   a2 = *(struct my_ffi_struct*)(args[1]);
  38
  39   *(my_ffi_struct *)resp = callee(a1, a2);
  40 }
  41
  42
  43 int main(void)
  44 {
  45   ffi_type* my_ffi_struct_fields[4];
  46   ffi_type my_ffi_struct_type;
  47   ffi_cif cif;
  48 #ifndef USING_MMAP
  49   static ffi_closure cl;
  50 #endif
  51   ffi_closure *pcl;
  52   void* args[4];
  53   ffi_type* arg_types[3];
  54
  55 #ifdef USING_MMAP
  56   pcl = allocate_mmap (sizeof(ffi_closure));
  57 #else
  58   pcl = &cl;
  59 #endif
  60
  61   struct my_ffi_struct g = { 1.0, 2.0, 3.0 };
  62   struct my_ffi_struct f = { 1.0, 2.0, 3.0 };
  63   struct my_ffi_struct res;
  64
  65   my_ffi_struct_type.size = 0;
  66   my_ffi_struct_type.alignment = 0;
  67   my_ffi_struct_type.type = FFI_TYPE_STRUCT;
  68   my_ffi_struct_type.elements = my_ffi_struct_fields;
  69
  70   my_ffi_struct_fields[0] = &ffi_type_double;
  71   my_ffi_struct_fields[1] = &ffi_type_double;
  72   my_ffi_struct_fields[2] = &ffi_type_double;
  73   my_ffi_struct_fields[3] = NULL;
  74
  75   arg_types[0] = &my_ffi_struct_type;
  76   arg_types[1] = &my_ffi_struct_type;
  77   arg_types[2] = NULL;
  78
  79   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &my_ffi_struct_type,
  80                      arg_types) == FFI_OK);
  81
  82   args[0] = &g;
  83   args[1] = &f;
  84   args[2] = NULL;
  85   ffi_call(&cif, FFI_FN(callee), &res, args);
  86   /* { dg-output "1 2 3 1 2 3: 2 4 6" } */
  87   printf("res: %g %g %g\n", res.a, res.b, res.c);
  88   /* { dg-output "\nres: 2 4 6" } */
  89
  90   CHECK(ffi_prep_closure(pcl, &cif, stub, NULL) == FFI_OK);
  91
  92   res = ((my_ffi_struct(*)(struct my_ffi_struct, struct my_ffi_struct))(pcl))(g, f);
  93   /* { dg-output "\n1 2 3 1 2 3: 2 4 6" } */
  94   printf("res: %g %g %g\n", res.a, res.b, res.c);
  95   /* { dg-output "\nres: 2 4 6" } */
  96
  97   exit(0);;
  98 }