libffi/testsuite/libffi.call/cls_2byte.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> 20030828  */
   8
   9 /* { dg-do run } */
  10 #include "ffitest.h"
  11
  12 typedef struct cls_struct_2byte {
  13   unsigned char a;
  14   unsigned char b;
  15 } cls_struct_2byte;
  16
  17 cls_struct_2byte cls_struct_2byte_fn(struct cls_struct_2byte a1,
  18                             struct cls_struct_2byte a2)
  19 {
  20   struct cls_struct_2byte result;
  21
  22   result.a = a1.a + a2.a;
  23   result.b = a1.b + a2.b;
  24
  25   printf("%d %d %d %d: %d %d\n", a1.a, a1.b, a2.a, a2.b, result.a, result.b);
  26
  27   return  result;
  28 }
  29
  30 static void
  31 cls_struct_2byte_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
  32                     void* userdata __UNUSED__)
  33 {
  34
  35   struct cls_struct_2byte a1, a2;
  36
  37   a1 = *(struct cls_struct_2byte*)(args[0]);
  38   a2 = *(struct cls_struct_2byte*)(args[1]);
  39
  40   *(cls_struct_2byte*)resp = cls_struct_2byte_fn(a1, a2);
  41 }
  42
  43 int main (void)
  44 {
  45   ffi_cif cif;
  46 #ifndef USING_MMAP
  47   static ffi_closure cl;
  48 #endif
  49   ffi_closure *pcl;
  50   void* args_dbl[5];
  51   ffi_type* cls_struct_fields[4];
  52   ffi_type cls_struct_type;
  53   ffi_type* dbl_arg_types[5];
  54
  55 #ifdef USING_MMAP
  56   pcl = allocate_mmap (sizeof(ffi_closure));
  57 #else
  58   pcl = &cl;
  59 #endif
  60
  61   cls_struct_type.size = 0;
  62   cls_struct_type.alignment = 0;
  63   cls_struct_type.type = FFI_TYPE_STRUCT;
  64   cls_struct_type.elements = cls_struct_fields;
  65
  66   struct cls_struct_2byte g_dbl = { 12, 127 };
  67   struct cls_struct_2byte f_dbl = { 1, 13 };
  68   struct cls_struct_2byte res_dbl;
  69
  70   cls_struct_fields[0] = &ffi_type_uchar;
  71   cls_struct_fields[1] = &ffi_type_uchar;
  72   cls_struct_fields[2] = NULL;
  73
  74   dbl_arg_types[0] = &cls_struct_type;
  75   dbl_arg_types[1] = &cls_struct_type;
  76   dbl_arg_types[2] = NULL;
  77
  78   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type,
  79                      dbl_arg_types) == FFI_OK);
  80
  81   args_dbl[0] = &g_dbl;
  82   args_dbl[1] = &f_dbl;
  83   args_dbl[2] = NULL;
  84
  85   ffi_call(&cif, FFI_FN(cls_struct_2byte_fn), &res_dbl, args_dbl);
  86   /* { dg-output "12 127 1 13: 13 140" } */
  87   printf("res: %d %d\n", res_dbl.a, res_dbl.b);
  88   /* { dg-output "\nres: 13 140" } */
  89
  90   CHECK(ffi_prep_closure(pcl, &cif, cls_struct_2byte_gn, NULL) == FFI_OK);
  91
  92   res_dbl = ((cls_struct_2byte(*)(cls_struct_2byte, cls_struct_2byte))(pcl))(g_dbl, f_dbl);
  93   /* { dg-output "\n12 127 1 13: 13 140" } */
  94   printf("res: %d %d\n", res_dbl.a, res_dbl.b);
  95   /* { dg-output "\nres: 13 140" } */
  96
  97   exit(0);
  98 }