libffi/testsuite/libffi.call/nested_struct8.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> 20051010  */
   8
   9 /* { dg-do run } */
  10 #include "ffitest.h"
  11
  12 typedef struct A {
  13   unsigned long 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 typedef struct C {
  23   unsigned long long d;
  24   unsigned char e;
  25 } C;
  26
  27 static B B_fn(struct A b2, struct B b3, struct C b4)
  28 {
  29   struct B result;
  30
  31   result.x.a = b2.a + b3.x.a + b4.d;
  32   result.x.b = b2.b + b3.x.b + b3.y + b4.e;
  33   result.y = b2.b + b3.x.b + b4.e;
  34
  35   printf("%d %d %d %d %d %d %d: %d %d %d\n", (int)b2.a, b2.b,
  36          (int)b3.x.a, b3.x.b, b3.y, (int)b4.d, b4.e,
  37          (int)result.x.a, result.x.b, result.y);
  38
  39   return result;
  40 }
  41
  42 static void
  43 B_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
  44      void* userdata __UNUSED__)
  45 {
  46   struct A b0;
  47   struct B b1;
  48   struct C b2;
  49
  50   b0 = *(struct A*)(args[0]);
  51   b1 = *(struct B*)(args[1]);
  52   b2 = *(struct C*)(args[2]);
  53
  54   *(B*)resp = B_fn(b0, b1, b2);
  55 }
  56
  57 int main (void)
  58 {
  59   ffi_cif cif;
  60   void *code;
  61   ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
  62   void* args_dbl[4];
  63   ffi_type* cls_struct_fields[3];
  64   ffi_type* cls_struct_fields1[3];
  65   ffi_type* cls_struct_fields2[3];
  66   ffi_type cls_struct_type, cls_struct_type1, cls_struct_type2;
  67   ffi_type* dbl_arg_types[4];
  68
  69   struct A e_dbl = { 1LL, 7};
  70   struct B f_dbl = {{12LL , 127}, 99};
  71   struct C g_dbl = { 2LL, 9};
  72
  73   struct B res_dbl;
  74
  75   cls_struct_type.size = 0;
  76   cls_struct_type.alignment = 0;
  77   cls_struct_type.type = FFI_TYPE_STRUCT;
  78   cls_struct_type.elements = cls_struct_fields;
  79
  80   cls_struct_type1.size = 0;
  81   cls_struct_type1.alignment = 0;
  82   cls_struct_type1.type = FFI_TYPE_STRUCT;
  83   cls_struct_type1.elements = cls_struct_fields1;
  84
  85   cls_struct_type2.size = 0;
  86   cls_struct_type2.alignment = 0;
  87   cls_struct_type2.type = FFI_TYPE_STRUCT;
  88   cls_struct_type2.elements = cls_struct_fields2;
  89
  90   cls_struct_fields[0] = &ffi_type_uint64;
  91   cls_struct_fields[1] = &ffi_type_uchar;
  92   cls_struct_fields[2] = NULL;
  93
  94   cls_struct_fields1[0] = &cls_struct_type;
  95   cls_struct_fields1[1] = &ffi_type_uchar;
  96   cls_struct_fields1[2] = NULL;
  97
  98   cls_struct_fields2[0] = &ffi_type_uint64;
  99   cls_struct_fields2[1] = &ffi_type_uchar;
 100   cls_struct_fields2[2] = NULL;
 101
 102
 103   dbl_arg_types[0] = &cls_struct_type;
 104   dbl_arg_types[1] = &cls_struct_type1;
 105   dbl_arg_types[2] = &cls_struct_type2;
 106   dbl_arg_types[3] = NULL;
 107
 108   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 3, &cls_struct_type1,
 109                      dbl_arg_types) == FFI_OK);
 110
 111   args_dbl[0] = &e_dbl;
 112   args_dbl[1] = &f_dbl;
 113   args_dbl[2] = &g_dbl;
 114   args_dbl[3] = NULL;
 115
 116   ffi_call(&cif, FFI_FN(B_fn), &res_dbl, args_dbl);
 117   /* { dg-output "1 7 12 127 99 2 9: 15 242 143" } */
 118   CHECK( res_dbl.x.a == (e_dbl.a + f_dbl.x.a + g_dbl.d));
 119   CHECK( res_dbl.x.b == (e_dbl.b + f_dbl.x.b + f_dbl.y + g_dbl.e));
 120   CHECK( res_dbl.y == (e_dbl.b + f_dbl.x.b + g_dbl.e));
 121
 122   CHECK(ffi_prep_closure_loc(pcl, &cif, B_gn, NULL, code) == FFI_OK);
 123
 124   res_dbl = ((B(*)(A, B, C))(code))(e_dbl, f_dbl, g_dbl);
 125   /* { dg-output "\n1 7 12 127 99 2 9: 15 242 143" } */
 126   CHECK( res_dbl.x.a == (e_dbl.a + f_dbl.x.a + g_dbl.d));
 127   CHECK( res_dbl.x.b == (e_dbl.b + f_dbl.x.b + f_dbl.y + g_dbl.e));
 128   CHECK( res_dbl.y == (e_dbl.b + f_dbl.x.b + g_dbl.e));
 129
 130   exit(0);
 131 }