shotgun/external_libs/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 #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[2];
  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_1_1byte g_dbl = { 12 };
  67   struct cls_struct_1_1byte f_dbl = { 178 };
  68   struct cls_struct_1_1byte res_dbl;
  69
  70   cls_struct_fields[0] = &ffi_type_uchar;
  71   cls_struct_fields[1] = NULL;
  72
  73   dbl_arg_types[0] = &cls_struct_type;
  74   dbl_arg_types[1] = &cls_struct_type;
  75   dbl_arg_types[2] = NULL;
  76
  77   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type,
  78                      dbl_arg_types) == FFI_OK);
  79
  80   args_dbl[0] = &g_dbl;
  81   args_dbl[1] = &f_dbl;
  82   args_dbl[2] = NULL;
  83
  84   ffi_call(&cif, FFI_FN(cls_struct_1_1byte_fn), &res_dbl, args_dbl);
  85   /* { dg-output "12 178: 190" } */
  86   printf("res: %d\n", res_dbl.a);
  87   /* { dg-output "\nres: 190" } */
  88
  89   CHECK(ffi_prep_closure(pcl, &cif, cls_struct_1_1byte_gn, NULL) == FFI_OK);
  90
  91   res_dbl = ((cls_struct_1_1byte(*)(cls_struct_1_1byte, cls_struct_1_1byte))(pcl))(g_dbl, f_dbl);
  92   /* { dg-output "\n12 178: 190" } */
  93   printf("res: %d\n", res_dbl.a);
  94   /* { dg-output "\nres: 190" } */
  95
  96   exit(0);
  97 }