github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libffi/testsuite/libffi.call/cls_struct_va1.c (about)

     1  /* Area:		ffi_call, closure_call
     2     Purpose:		Test doubles passed in variable argument lists.
     3     Limitations:	none.
     4     PR:			none.
     5     Originator:	Blake Chaffin 6/6/2007	 */
     6  
     7  /* { dg-do run } */
     8  /* { dg-output "" { xfail avr32*-*-* } } */
     9  #include "ffitest.h"
    10  
    11  struct small_tag
    12  {
    13    unsigned char a;
    14    unsigned char b;
    15  };
    16  
    17  struct large_tag
    18  {
    19    unsigned a;
    20    unsigned b;
    21    unsigned c;
    22    unsigned d;
    23    unsigned e;
    24  };
    25  
    26  static void
    27  test_fn (ffi_cif* cif __UNUSED__, void* resp,
    28  	 void** args, void* userdata __UNUSED__)
    29  {
    30    int n = *(int*)args[0];
    31    struct small_tag s1 = * (struct small_tag *) args[1];
    32    struct large_tag l1 = * (struct large_tag *) args[2];
    33    struct small_tag s2 = * (struct small_tag *) args[3];
    34  
    35    printf ("%d %d %d %d %d %d %d %d %d %d\n", n, s1.a, s1.b,
    36  	  l1.a, l1.b, l1.c, l1.d, l1.e,
    37  	  s2.a, s2.b);
    38    * (ffi_arg*) resp = 42;
    39  }
    40  
    41  int
    42  main (void)
    43  {
    44    ffi_cif cif;
    45    void *code;
    46    ffi_closure *pcl = ffi_closure_alloc (sizeof (ffi_closure), &code);
    47    ffi_type* arg_types[5];
    48  
    49    ffi_arg res = 0;
    50  
    51    ffi_type s_type;
    52    ffi_type *s_type_elements[3];
    53  
    54    ffi_type l_type;
    55    ffi_type *l_type_elements[6];
    56  
    57    struct small_tag s1;
    58    struct small_tag s2;
    59    struct large_tag l1;
    60  
    61    int si;
    62  
    63    s_type.size = 0;
    64    s_type.alignment = 0;
    65    s_type.type = FFI_TYPE_STRUCT;
    66    s_type.elements = s_type_elements;
    67  
    68    s_type_elements[0] = &ffi_type_uchar;
    69    s_type_elements[1] = &ffi_type_uchar;
    70    s_type_elements[2] = NULL;
    71  
    72    l_type.size = 0;
    73    l_type.alignment = 0;
    74    l_type.type = FFI_TYPE_STRUCT;
    75    l_type.elements = l_type_elements;
    76  
    77    l_type_elements[0] = &ffi_type_uint;
    78    l_type_elements[1] = &ffi_type_uint;
    79    l_type_elements[2] = &ffi_type_uint;
    80    l_type_elements[3] = &ffi_type_uint;
    81    l_type_elements[4] = &ffi_type_uint;
    82    l_type_elements[5] = NULL;
    83  
    84    arg_types[0] = &ffi_type_sint;
    85    arg_types[1] = &s_type;
    86    arg_types[2] = &l_type;
    87    arg_types[3] = &s_type;
    88    arg_types[4] = NULL;
    89  
    90    CHECK(ffi_prep_cif_var(&cif, FFI_DEFAULT_ABI, 1, 4, &ffi_type_sint,
    91  			 arg_types) == FFI_OK);
    92  
    93    si = 4;
    94    s1.a = 5;
    95    s1.b = 6;
    96  
    97    s2.a = 20;
    98    s2.b = 21;
    99  
   100    l1.a = 10;
   101    l1.b = 11;
   102    l1.c = 12;
   103    l1.d = 13;
   104    l1.e = 14;
   105  
   106    CHECK(ffi_prep_closure_loc(pcl, &cif, test_fn, NULL, code) == FFI_OK);
   107  
   108    res = ((int (*)(int, ...))(code))(si, s1, l1, s2);
   109    /* { dg-output "4 5 6 10 11 12 13 14 20 21" } */
   110    printf("res: %d\n", (int) res);
   111    /* { dg-output "\nres: 42" } */
   112  
   113    exit(0);
   114  }