shotgun/external_libs/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 *)((unsigned long)a1.b + (unsigned long)a2.b);
  23   result.c = a1.c + a2.c;
  24
  25   printf("%d %lu %d %d %lu %d: %d %lu %d\n", a1.a, (unsigned long)a1.b, a1.c,
  26          a2.a, (unsigned long)a2.b, a2.c, result.a, (unsigned long)result.b,
  27          result.c);
  28
  29   return result;
  30 }
  31
  32 static void
  33 cls_struct_align_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
  34                     void* userdata __UNUSED__)
  35 {
  36
  37   struct cls_struct_align a1, a2;
  38
  39   a1 = *(struct cls_struct_align*)(args[0]);
  40   a2 = *(struct cls_struct_align*)(args[1]);
  41
  42   *(cls_struct_align*)resp = cls_struct_align_fn(a1, a2);
  43 }
  44
  45 int main (void)
  46 {
  47   ffi_cif cif;
  48 #ifndef USING_MMAP
  49   static ffi_closure cl;
  50 #endif
  51   ffi_closure *pcl;
  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 #ifdef USING_MMAP
  58   pcl = allocate_mmap (sizeof(ffi_closure));
  59 #else
  60   pcl = &cl;
  61 #endif
  62
  63   cls_struct_type.size = 0;
  64   cls_struct_type.alignment = 0;
  65   cls_struct_type.type = FFI_TYPE_STRUCT;
  66   cls_struct_type.elements = cls_struct_fields;
  67
  68   struct cls_struct_align g_dbl = { 12, (void *)4951, 127 };
  69   struct cls_struct_align f_dbl = { 1, (void *)9320, 13 };
  70   struct cls_struct_align res_dbl;
  71
  72   cls_struct_fields[0] = &ffi_type_uchar;
  73   cls_struct_fields[1] = &ffi_type_pointer;
  74   cls_struct_fields[2] = &ffi_type_uchar;
  75   cls_struct_fields[3] = NULL;
  76
  77   dbl_arg_types[0] = &cls_struct_type;
  78   dbl_arg_types[1] = &cls_struct_type;
  79   dbl_arg_types[2] = NULL;
  80
  81   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type,
  82                      dbl_arg_types) == FFI_OK);
  83
  84   args_dbl[0] = &g_dbl;
  85   args_dbl[1] = &f_dbl;
  86   args_dbl[2] = NULL;
  87
  88   ffi_call(&cif, FFI_FN(cls_struct_align_fn), &res_dbl, args_dbl);
  89   /* { dg-output "12 4951 127 1 9320 13: 13 14271 140" } */
  90   printf("res: %d %lu %d\n", res_dbl.a, (unsigned long)res_dbl.b, res_dbl.c);
  91   /* { dg-output "\nres: 13 14271 140" } */
  92
  93   CHECK(ffi_prep_closure(pcl, &cif, cls_struct_align_gn, NULL) == FFI_OK);
  94
  95   res_dbl = ((cls_struct_align(*)(cls_struct_align, cls_struct_align))(pcl))(g_dbl, f_dbl);
  96   /* { dg-output "\n12 4951 127 1 9320 13: 13 14271 140" } */
  97   printf("res: %d %lu %d\n", res_dbl.a, (unsigned long)res_dbl.b, res_dbl.c);
  98   /* { dg-output "\nres: 13 14271 140" } */
  99
 100   exit(0);
 101 }