libffi/testsuite/libffi.call/uninitialized.c

   1 /* { dg-do run } */
   2 #include "ffitest.h"
   3
   4 typedef struct
   5 {
   6   unsigned char uc;
   7   double d;
   8   unsigned int ui;
   9 } test_structure_1;
  10
  11 static test_structure_1 struct1(test_structure_1 ts)
  12 {
  13   ts.uc++;
  14   ts.d--;
  15   ts.ui++;
  16
  17   return ts;
  18 }
  19
  20 int main (void)
  21 {
  22   ffi_cif cif;
  23   ffi_type *args[MAX_ARGS];
  24   void *values[MAX_ARGS];
  25   ffi_type ts1_type;
  26   ffi_type *ts1_type_elements[4];
  27
  28   memset(&cif, 1, sizeof(cif));
  29   ts1_type.size = 0;
  30   ts1_type.alignment = 0;
  31   ts1_type.type = FFI_TYPE_STRUCT;
  32   ts1_type.elements = ts1_type_elements;
  33   ts1_type_elements[0] = &ffi_type_uchar;
  34   ts1_type_elements[1] = &ffi_type_double;
  35   ts1_type_elements[2] = &ffi_type_uint;
  36   ts1_type_elements[3] = NULL;
  37
  38   test_structure_1 ts1_arg;
  39   /* This is a hack to get a properly aligned result buffer */
  40   test_structure_1 *ts1_result =
  41     (test_structure_1 *) malloc (sizeof(test_structure_1));
  42
  43   args[0] = &ts1_type;
  44   values[0] = &ts1_arg;
  45
  46   /* Initialize the cif */
  47   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1,
  48                      &ts1_type, args) == FFI_OK);
  49
  50   ts1_arg.uc = '\x01';
  51   ts1_arg.d = 3.14159;
  52   ts1_arg.ui = 555;
  53
  54   ffi_call(&cif, FFI_FN(struct1), ts1_result, values);
  55
  56   CHECK(ts1_result->ui == 556);
  57   CHECK(ts1_result->d == 3.14159 - 1);
  58
  59   free (ts1_result);
  60   exit(0);
  61 }