shotgun/external_libs/libffi/testsuite/libffi.call/nested_struct10.c

   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> 20051010  */
   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   unsigned char y;
  19   struct A x;
  20   unsigned int z;
  21 } B;
  22
  23 typedef struct C {
  24   unsigned long long d;
  25   unsigned char e;
  26 } C;
  27
  28 static B B_fn(struct A b2, struct B b3, struct C b4)
  29 {
  30   struct B result;
  31
  32   result.x.a = b2.a + b3.x.a + b3.z + b4.d;
  33   result.x.b = b2.b + b3.x.b + b3.y + b4.e;
  34   result.y = b2.b + b3.x.b + b4.e;
  35
  36   printf("%d %d %d %d %d %d %d %d: %d %d %d\n", (int)b2.a, b2.b,
  37          (int)b3.x.a, b3.x.b, b3.y, b3.z, (int)b4.d, b4.e,
  38          (int)result.x.a, result.x.b, result.y);
  39
  40   return result;
  41 }
  42
  43 static void
  44 B_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
  45      void* userdata __UNUSED__)
  46 {
  47   struct A b0;
  48   struct B b1;
  49   struct C b2;
  50
  51   b0 = *(struct A*)(args[0]);
  52   b1 = *(struct B*)(args[1]);
  53   b2 = *(struct C*)(args[2]);
  54
  55   *(B*)resp = B_fn(b0, b1, b2);
  56 }
  57
  58 int main (void)
  59 {
  60   ffi_cif cif;
  61 #ifndef USING_MMAP
  62   static ffi_closure cl;
  63 #endif
  64   ffi_closure *pcl;
  65   void* args_dbl[4];
  66   ffi_type* cls_struct_fields[3];
  67   ffi_type* cls_struct_fields1[4];
  68   ffi_type* cls_struct_fields2[3];
  69   ffi_type cls_struct_type, cls_struct_type1, cls_struct_type2;
  70   ffi_type* dbl_arg_types[4];
  71
  72 #ifdef USING_MMAP
  73   pcl = allocate_mmap (sizeof(ffi_closure));
  74 #else
  75   pcl = &cl;
  76 #endif
  77
  78   cls_struct_type.size = 0;
  79   cls_struct_type.alignment = 0;
  80   cls_struct_type.type = FFI_TYPE_STRUCT;
  81   cls_struct_type.elements = cls_struct_fields;
  82
  83   cls_struct_type1.size = 0;
  84   cls_struct_type1.alignment = 0;
  85   cls_struct_type1.type = FFI_TYPE_STRUCT;
  86   cls_struct_type1.elements = cls_struct_fields1;
  87
  88   cls_struct_type2.size = 0;
  89   cls_struct_type2.alignment = 0;
  90   cls_struct_type2.type = FFI_TYPE_STRUCT;
  91   cls_struct_type2.elements = cls_struct_fields2;
  92
  93   struct A e_dbl = { 1LL, 7};
  94   struct B f_dbl = { 99, {12LL , 127}, 255};
  95   struct C g_dbl = { 2LL, 9};
  96
  97   struct B res_dbl;
  98
  99   cls_struct_fields[0] = &ffi_type_uint64;
 100   cls_struct_fields[1] = &ffi_type_uchar;
 101   cls_struct_fields[2] = NULL;
 102
 103   cls_struct_fields1[0] = &ffi_type_uchar;
 104   cls_struct_fields1[1] = &cls_struct_type;
 105   cls_struct_fields1[2] = &ffi_type_uint;
 106   cls_struct_fields1[3] = NULL;
 107
 108   cls_struct_fields2[0] = &ffi_type_uint64;
 109   cls_struct_fields2[1] = &ffi_type_uchar;
 110   cls_struct_fields2[2] = NULL;
 111
 112
 113   dbl_arg_types[0] = &cls_struct_type;
 114   dbl_arg_types[1] = &cls_struct_type1;
 115   dbl_arg_types[2] = &cls_struct_type2;
 116   dbl_arg_types[3] = NULL;
 117
 118   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 3, &cls_struct_type1,
 119                      dbl_arg_types) == FFI_OK);
 120
 121   args_dbl[0] = &e_dbl;
 122   args_dbl[1] = &f_dbl;
 123   args_dbl[2] = &g_dbl;
 124   args_dbl[3] = NULL;
 125
 126   ffi_call(&cif, FFI_FN(B_fn), &res_dbl, args_dbl);
 127   /* { dg-output "1 7 12 127 99 255 2 9: 270 242 143" } */
 128   CHECK( res_dbl.x.a == (e_dbl.a + f_dbl.x.a + f_dbl.z + g_dbl.d));
 129   CHECK( res_dbl.x.b == (e_dbl.b + f_dbl.x.b + f_dbl.y + g_dbl.e));
 130   CHECK( res_dbl.y == (e_dbl.b + f_dbl.x.b + g_dbl.e));
 131
 132   CHECK(ffi_prep_closure(pcl, &cif, B_gn, NULL) == FFI_OK);
 133
 134   res_dbl = ((B(*)(A, B, C))(pcl))(e_dbl, f_dbl, g_dbl);
 135   /* { dg-output "\n1 7 12 127 99 255 2 9: 270 242 143" } */
 136   CHECK( res_dbl.x.a == (e_dbl.a + f_dbl.x.a + f_dbl.z + g_dbl.d));
 137   CHECK( res_dbl.x.b == (e_dbl.b + f_dbl.x.b + f_dbl.y + g_dbl.e));
 138   CHECK( res_dbl.y == (e_dbl.b + f_dbl.x.b + g_dbl.e));
 139
 140   exit(0);
 141 }