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    struct cls_struct_1_1byte g_dbl = { 12 };
      54    struct cls_struct_1_1byte f_dbl = { 178 };
      55    struct cls_struct_1_1byte res_dbl;
      56  
      57    cls_struct_type.size = 0;
      58    cls_struct_type.alignment = 0;
      59    cls_struct_type.type = FFI_TYPE_STRUCT;
      60    cls_struct_type.elements = cls_struct_fields;
      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  }