1 /* Area:	ffi_call, closure_call
2    Purpose:	Check structure passing with different structure size.
3 		Especially with small structures which may fit in one
4 		register. Depending on the ABI.
5    Limitations:	none.
6    PR:		none.
7    Originator:	<andreast@gcc.gnu.org> 20030828	 */
8 
9 /* { dg-do run } */
10 #include "ffitest.h"
11 
12 typedef struct cls_struct_2byte {
13   unsigned char a;
14   unsigned char b;
15 } cls_struct_2byte;
16 
cls_struct_2byte_fn(struct cls_struct_2byte a1,struct cls_struct_2byte a2)17 cls_struct_2byte cls_struct_2byte_fn(struct cls_struct_2byte a1,
18 			    struct cls_struct_2byte a2)
19 {
20   struct cls_struct_2byte result;
21 
22   result.a = a1.a + a2.a;
23   result.b = a1.b + a2.b;
24 
25   printf("%d %d %d %d: %d %d\n", a1.a, a1.b, a2.a, a2.b, result.a, result.b);
26 
27   return  result;
28 }
29 
30 static void
cls_struct_2byte_gn(ffi_cif * cif __UNUSED__,void * resp,void ** args,void * userdata __UNUSED__)31 cls_struct_2byte_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
32 		    void* userdata __UNUSED__)
33 {
34 
35   struct cls_struct_2byte a1, a2;
36 
37   a1 = *(struct cls_struct_2byte*)(args[0]);
38   a2 = *(struct cls_struct_2byte*)(args[1]);
39 
40   *(cls_struct_2byte*)resp = cls_struct_2byte_fn(a1, a2);
41 }
42 
main(void)43 int main (void)
44 {
45   ffi_cif cif;
46   void *code;
47   ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
48   void* args_dbl[5];
49   ffi_type* cls_struct_fields[4];
50   ffi_type cls_struct_type;
51   ffi_type* dbl_arg_types[5];
52 
53   struct cls_struct_2byte g_dbl = { 12, 127 };
54   struct cls_struct_2byte f_dbl = { 1, 13 };
55   struct cls_struct_2byte res_dbl;
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   cls_struct_fields[0] = &ffi_type_uchar;
63   cls_struct_fields[1] = &ffi_type_uchar;
64   cls_struct_fields[2] = NULL;
65 
66   dbl_arg_types[0] = &cls_struct_type;
67   dbl_arg_types[1] = &cls_struct_type;
68   dbl_arg_types[2] = NULL;
69 
70   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type,
71 		     dbl_arg_types) == FFI_OK);
72 
73   args_dbl[0] = &g_dbl;
74   args_dbl[1] = &f_dbl;
75   args_dbl[2] = NULL;
76 
77   ffi_call(&cif, FFI_FN(cls_struct_2byte_fn), &res_dbl, args_dbl);
78   /* { dg-output "12 127 1 13: 13 140" } */
79   printf("res: %d %d\n", res_dbl.a, res_dbl.b);
80   /* { dg-output "\nres: 13 140" } */
81 
82   CHECK(ffi_prep_closure_loc(pcl, &cif, cls_struct_2byte_gn, NULL, code) == FFI_OK);
83 
84   res_dbl = ((cls_struct_2byte(*)(cls_struct_2byte, cls_struct_2byte))(code))(g_dbl, f_dbl);
85   /* { dg-output "\n12 127 1 13: 13 140" } */
86   printf("res: %d %d\n", res_dbl.a, res_dbl.b);
87   /* { dg-output "\nres: 13 140" } */
88 
89   exit(0);
90 }
91