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      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 (at) gcc.gnu.org> 20030911	 */
      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 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("%d %d %d %d %d: %d %d %d\n", (int)b0.a, b0.b,
     31 	 (int)b1.x.a, b1.x.b, b1.y,
     32 	 (int)result.x.a, result.x.b, result.y);
     33 
     34   return result;
     35 }
     36 
     37 static void
     38 B_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
     39      void* userdata __UNUSED__)
     40 {
     41   struct A b0;
     42   struct B b1;
     43 
     44   b0 = *(struct A*)(args[0]);
     45   b1 = *(struct B*)(args[1]);
     46 
     47   *(B*)resp = B_fn(b0, b1);
     48 }
     49 
     50 int main (void)
     51 {
     52   ffi_cif cif;
     53 #ifndef USING_MMAP
     54   static ffi_closure cl;
     55 #endif
     56   ffi_closure *pcl;
     57   void* args_dbl[3];
     58   ffi_type* cls_struct_fields[3];
     59   ffi_type* cls_struct_fields1[3];
     60   ffi_type cls_struct_type, cls_struct_type1;
     61   ffi_type* dbl_arg_types[3];
     62 
     63 #ifdef USING_MMAP
     64   pcl = allocate_mmap (sizeof(ffi_closure));
     65 #else
     66   pcl = &cl;
     67 #endif
     68 
     69   cls_struct_type.size = 0;
     70   cls_struct_type.alignment = 0;
     71   cls_struct_type.type = FFI_TYPE_STRUCT;
     72   cls_struct_type.elements = cls_struct_fields;
     73 
     74   cls_struct_type1.size = 0;
     75   cls_struct_type1.alignment = 0;
     76   cls_struct_type1.type = FFI_TYPE_STRUCT;
     77   cls_struct_type1.elements = cls_struct_fields1;
     78 
     79   struct A e_dbl = { 1LL, 7};
     80   struct B f_dbl = {{12LL , 127}, 99};
     81 
     82   struct B res_dbl;
     83 
     84   cls_struct_fields[0] = &ffi_type_uint64;
     85   cls_struct_fields[1] = &ffi_type_uchar;
     86   cls_struct_fields[2] = NULL;
     87 
     88   cls_struct_fields1[0] = &cls_struct_type;
     89   cls_struct_fields1[1] = &ffi_type_uchar;
     90   cls_struct_fields1[2] = NULL;
     91 
     92 
     93   dbl_arg_types[0] = &cls_struct_type;
     94   dbl_arg_types[1] = &cls_struct_type1;
     95   dbl_arg_types[2] = NULL;
     96 
     97   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type1,
     98 		     dbl_arg_types) == FFI_OK);
     99 
    100   args_dbl[0] = &e_dbl;
    101   args_dbl[1] = &f_dbl;
    102   args_dbl[2] = NULL;
    103 
    104   ffi_call(&cif, FFI_FN(B_fn), &res_dbl, args_dbl);
    105   /* { dg-output "1 7 12 127 99: 13 233 134" } */
    106   CHECK( res_dbl.x.a == (e_dbl.a + f_dbl.x.a));
    107   CHECK( res_dbl.x.b == (e_dbl.b + f_dbl.x.b + f_dbl.y));
    108   CHECK( res_dbl.y == (e_dbl.b + f_dbl.x.b));
    109 
    110 
    111   CHECK(ffi_prep_closure(pcl, &cif, B_gn, NULL) == FFI_OK);
    112 
    113   res_dbl = ((B(*)(A, B))(pcl))(e_dbl, f_dbl);
    114   /* { dg-output "\n1 7 12 127 99: 13 233 134" } */
    115   CHECK( res_dbl.x.a == (e_dbl.a + f_dbl.x.a));
    116   CHECK( res_dbl.x.b == (e_dbl.b + f_dbl.x.b + f_dbl.y));
    117   CHECK( res_dbl.y == (e_dbl.b + f_dbl.x.b));
    118   exit(0);
    119 }
    120