libffi/testsuite/libffi.call/nested_struct2.c

   1 /* Area:        ffi_call, closure_call
   2    Purpose:     Check structure passing with different structure size.
   3                 Contains structs as parameter of the struct itself.
   4                 Sample taken from Alan Modras patch to src/prep_cif.c.
   5    Limitations: none.
   6    PR:          none.
   7    Originator:  <andreast@gcc.gnu.org> 20030911  */
   8
   9 /* { dg-do run } */
  10 #include "ffitest.h"
  11
  12 typedef struct A {
  13   unsigned long a;
  14   unsigned char b;
  15 } A;
  16
  17 typedef struct B {
  18   struct A x;
  19   unsigned char y;
  20 } B;
  21
  22 B B_fn(struct A b0, struct B b1)
  23 {
  24   struct B result;
  25
  26   result.x.a = b0.a + b1.x.a;
  27   result.x.b = b0.b + b1.x.b + b1.y;
  28   result.y = b0.b + b1.x.b;
  29
  30   printf("%lu %d %lu %d %d: %lu %d %d\n", b0.a, b0.b, b1.x.a, b1.x.b, b1.y,
  31          result.x.a, result.x.b, result.y);
  32
  33   return result;
  34 }
  35
  36 static void
  37 B_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
  38      void* userdata __UNUSED__)
  39 {
  40   struct A b0;
  41   struct B b1;
  42
  43   b0 = *(struct A*)(args[0]);
  44   b1 = *(struct B*)(args[1]);
  45
  46   *(B*)resp = B_fn(b0, b1);
  47 }
  48
  49 int main (void)
  50 {
  51   ffi_cif cif;
  52   void *code;
  53   ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
  54   void* args_dbl[3];
  55   ffi_type* cls_struct_fields[3];
  56   ffi_type* cls_struct_fields1[3];
  57   ffi_type cls_struct_type, cls_struct_type1;
  58   ffi_type* dbl_arg_types[3];
  59
  60   cls_struct_type.size = 0;
  61   cls_struct_type.alignment = 0;
  62   cls_struct_type.type = FFI_TYPE_STRUCT;
  63   cls_struct_type.elements = cls_struct_fields;
  64
  65   cls_struct_type1.size = 0;
  66   cls_struct_type1.alignment = 0;
  67   cls_struct_type1.type = FFI_TYPE_STRUCT;
  68   cls_struct_type1.elements = cls_struct_fields1;
  69
  70   struct A e_dbl = { 1, 7};
  71   struct B f_dbl = {{12 , 127}, 99};
  72
  73   struct B res_dbl;
  74
  75   cls_struct_fields[0] = &ffi_type_ulong;
  76   cls_struct_fields[1] = &ffi_type_uchar;
  77   cls_struct_fields[2] = NULL;
  78
  79   cls_struct_fields1[0] = &cls_struct_type;
  80   cls_struct_fields1[1] = &ffi_type_uchar;
  81   cls_struct_fields1[2] = NULL;
  82
  83
  84   dbl_arg_types[0] = &cls_struct_type;
  85   dbl_arg_types[1] = &cls_struct_type1;
  86   dbl_arg_types[2] = NULL;
  87
  88   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type1,
  89                      dbl_arg_types) == FFI_OK);
  90
  91   args_dbl[0] = &e_dbl;
  92   args_dbl[1] = &f_dbl;
  93   args_dbl[2] = NULL;
  94
  95   ffi_call(&cif, FFI_FN(B_fn), &res_dbl, args_dbl);
  96   /* { dg-output "1 7 12 127 99: 13 233 134" } */
  97   CHECK( res_dbl.x.a == (e_dbl.a + f_dbl.x.a));
  98   CHECK( res_dbl.x.b == (e_dbl.b + f_dbl.x.b + f_dbl.y));
  99   CHECK( res_dbl.y == (e_dbl.b + f_dbl.x.b));
 100
 101   CHECK(ffi_prep_closure_loc(pcl, &cif, B_gn, NULL, code) == FFI_OK);
 102
 103   res_dbl = ((B(*)(A, B))(code))(e_dbl, f_dbl);
 104   /* { dg-output "\n1 7 12 127 99: 13 233 134" } */
 105   CHECK( res_dbl.x.a == (e_dbl.a + f_dbl.x.a));
 106   CHECK( res_dbl.x.b == (e_dbl.b + f_dbl.x.b + f_dbl.y));
 107   CHECK( res_dbl.y == (e_dbl.b + f_dbl.x.b));
 108
 109   exit(0);
 110 }