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  static 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    struct A e_dbl = { 1, 7};
      61    struct B f_dbl = {{12 , 127}, 99};
      62  
      63    struct B res_dbl;
      64  
      65    cls_struct_type.size = 0;
      66    cls_struct_type.alignment = 0;
      67    cls_struct_type.type = FFI_TYPE_STRUCT;
      68    cls_struct_type.elements = cls_struct_fields;
      69  
      70    cls_struct_type1.size = 0;
      71    cls_struct_type1.alignment = 0;
      72    cls_struct_type1.type = FFI_TYPE_STRUCT;
      73    cls_struct_type1.elements = cls_struct_fields1;
      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  }