libffi/testsuite/libffi.call/cls_align_pointer.c

   1 /* Area:        ffi_call, closure_call
   2    Purpose:     Check structure alignment of pointer.
   3    Limitations: none.
   4    PR:          none.
   5    Originator:  <hos@tamanegi.org> 20031203      */
   6
   7 /* { dg-do run } */
   8 #include "ffitest.h"
   9
  10 typedef struct cls_struct_align {
  11   unsigned char a;
  12   void *b;
  13   unsigned char c;
  14 } cls_struct_align;
  15
  16 cls_struct_align cls_struct_align_fn(struct cls_struct_align a1,
  17                             struct cls_struct_align a2)
  18 {
  19   struct cls_struct_align result;
  20
  21   result.a = a1.a + a2.a;
  22   result.b = (void *)((uintptr_t)a1.b + (uintptr_t)a2.b);
  23   result.c = a1.c + a2.c;
  24
  25   printf("%d %" PRIuPTR " %d %d %" PRIuPTR " %d: %d %" PRIuPTR " %d\n",
  26          a1.a, (uintptr_t)a1.b, a1.c,
  27          a2.a, (uintptr_t)a2.b, a2.c,
  28          result.a, (uintptr_t)result.b,
  29          result.c);
  30
  31   return result;
  32 }
  33
  34 static void
  35 cls_struct_align_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
  36                     void* userdata __UNUSED__)
  37 {
  38
  39   struct cls_struct_align a1, a2;
  40
  41   a1 = *(struct cls_struct_align*)(args[0]);
  42   a2 = *(struct cls_struct_align*)(args[1]);
  43
  44   *(cls_struct_align*)resp = cls_struct_align_fn(a1, a2);
  45 }
  46
  47 int main (void)
  48 {
  49   ffi_cif cif;
  50   void *code;
  51   ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
  52   void* args_dbl[5];
  53   ffi_type* cls_struct_fields[4];
  54   ffi_type cls_struct_type;
  55   ffi_type* dbl_arg_types[5];
  56
  57   cls_struct_type.size = 0;
  58   cls_struct_type.alignment = 0;
  59   cls_struct_type.type = FFI_TYPE_STRUCT;
  60   cls_struct_type.elements = cls_struct_fields;
  61
  62   struct cls_struct_align g_dbl = { 12, (void *)4951, 127 };
  63   struct cls_struct_align f_dbl = { 1, (void *)9320, 13 };
  64   struct cls_struct_align res_dbl;
  65
  66   cls_struct_fields[0] = &ffi_type_uchar;
  67   cls_struct_fields[1] = &ffi_type_pointer;
  68   cls_struct_fields[2] = &ffi_type_uchar;
  69   cls_struct_fields[3] = NULL;
  70
  71   dbl_arg_types[0] = &cls_struct_type;
  72   dbl_arg_types[1] = &cls_struct_type;
  73   dbl_arg_types[2] = NULL;
  74
  75   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type,
  76                      dbl_arg_types) == FFI_OK);
  77
  78   args_dbl[0] = &g_dbl;
  79   args_dbl[1] = &f_dbl;
  80   args_dbl[2] = NULL;
  81
  82   ffi_call(&cif, FFI_FN(cls_struct_align_fn), &res_dbl, args_dbl);
  83   /* { dg-output "12 4951 127 1 9320 13: 13 14271 140" } */
  84   printf("res: %d %" PRIuPTR " %d\n", res_dbl.a, (uintptr_t)res_dbl.b, res_dbl.c);
  85   /* { dg-output "\nres: 13 14271 140" } */
  86
  87   CHECK(ffi_prep_closure_loc(pcl, &cif, cls_struct_align_gn, NULL, code) == FFI_OK);
  88
  89   res_dbl = ((cls_struct_align(*)(cls_struct_align, cls_struct_align))(code))(g_dbl, f_dbl);
  90   /* { dg-output "\n12 4951 127 1 9320 13: 13 14271 140" } */
  91   printf("res: %d %" PRIuPTR " %d\n", res_dbl.a, (uintptr_t)res_dbl.b, res_dbl.c);
  92   /* { dg-output "\nres: 13 14271 140" } */
  93
  94   exit(0);
  95 }