libffi/testsuite/libffi.call/cls_1_1byte.c

   1 /* Area:        ffi_call, closure_call
   2    Purpose:     Check structure passing with different structure size.
   3                 Especially with small structures which may fit in one
   4                 register. Depending on the ABI.
   5    Limitations: none.
   6    PR:          none.
   7    Originator:  <andreast@gcc.gnu.org> 20030902  */
   8
   9
  10
  11 /* { dg-do run } */
  12 #include "ffitest.h"
  13
  14 typedef struct cls_struct_1_1byte {
  15   unsigned char a;
  16 } cls_struct_1_1byte;
  17
  18 cls_struct_1_1byte cls_struct_1_1byte_fn(struct cls_struct_1_1byte a1,
  19                             struct cls_struct_1_1byte a2)
  20 {
  21   struct cls_struct_1_1byte result;
  22
  23   result.a = a1.a + a2.a;
  24
  25   printf("%d %d: %d\n", a1.a, a2.a, result.a);
  26
  27   return  result;
  28 }
  29
  30 static void
  31 cls_struct_1_1byte_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
  32                       void* userdata __UNUSED__)
  33 {
  34
  35   struct cls_struct_1_1byte a1, a2;
  36
  37   a1 = *(struct cls_struct_1_1byte*)(args[0]);
  38   a2 = *(struct cls_struct_1_1byte*)(args[1]);
  39
  40   *(cls_struct_1_1byte*)resp = cls_struct_1_1byte_fn(a1, a2);
  41 }
  42
  43 int main (void)
  44 {
  45   ffi_cif cif;
  46   void *code;
  47   ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
  48   void* args_dbl[5];
  49   ffi_type* cls_struct_fields[2];
  50   ffi_type cls_struct_type;
  51   ffi_type* dbl_arg_types[5];
  52
  53   cls_struct_type.size = 0;
  54   cls_struct_type.alignment = 0;
  55   cls_struct_type.type = FFI_TYPE_STRUCT;
  56   cls_struct_type.elements = cls_struct_fields;
  57
  58   struct cls_struct_1_1byte g_dbl = { 12 };
  59   struct cls_struct_1_1byte f_dbl = { 178 };
  60   struct cls_struct_1_1byte res_dbl;
  61
  62   cls_struct_fields[0] = &ffi_type_uchar;
  63   cls_struct_fields[1] = NULL;
  64
  65   dbl_arg_types[0] = &cls_struct_type;
  66   dbl_arg_types[1] = &cls_struct_type;
  67   dbl_arg_types[2] = NULL;
  68
  69   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type,
  70                      dbl_arg_types) == FFI_OK);
  71
  72   args_dbl[0] = &g_dbl;
  73   args_dbl[1] = &f_dbl;
  74   args_dbl[2] = NULL;
  75
  76   ffi_call(&cif, FFI_FN(cls_struct_1_1byte_fn), &res_dbl, args_dbl);
  77   /* { dg-output "12 178: 190" } */
  78   printf("res: %d\n", res_dbl.a);
  79   /* { dg-output "\nres: 190" } */
  80
  81   CHECK(ffi_prep_closure_loc(pcl, &cif, cls_struct_1_1byte_gn, NULL, code) == FFI_OK);
  82
  83   res_dbl = ((cls_struct_1_1byte(*)(cls_struct_1_1byte, cls_struct_1_1byte))(code))(g_dbl, f_dbl);
  84   /* { dg-output "\n12 178: 190" } */
  85   printf("res: %d\n", res_dbl.a);
  86   /* { dg-output "\nres: 190" } */
  87
  88   exit(0);
  89 }