libffi/testsuite/libffi.call/cls_pointer_stack.c

   1 /* Area:                ffi_call, closure_call
   2    Purpose:             Check pointer arguments across multiple hideous stack frames.
   3    Limitations: none.
   4    PR:                  none.
   5    Originator:  Blake Chaffin 6/7/2007  */
   6
   7 /* { dg-do run { xfail strongarm*-*-* xscale*-*-* } } */
   8 #include "ffitest.h"
   9
  10 static  long dummyVar;
  11
  12 long dummy_func(
  13         long double a1, char b1,
  14         long double a2, char b2,
  15         long double a3, char b3,
  16         long double a4, char b4)
  17 {
  18         return a1 + b1 + a2 + b2 + a3 + b3 + a4 + b4;
  19 }
  20
  21 void* cls_pointer_fn2(void* a1, void* a2)
  22 {
  23         long double     trample1        = (intptr_t)a1 + (intptr_t)a2;
  24         char            trample2        = ((char*)&a1)[0] + ((char*)&a2)[0];
  25         long double     trample3        = (intptr_t)trample1 + (intptr_t)a1;
  26         char            trample4        = trample2 + ((char*)&a1)[1];
  27         long double     trample5        = (intptr_t)trample3 + (intptr_t)a2;
  28         char            trample6        = trample4 + ((char*)&a2)[1];
  29         long double     trample7        = (intptr_t)trample5 + (intptr_t)trample1;
  30         char            trample8        = trample6 + trample2;
  31
  32         dummyVar        = dummy_func(trample1, trample2, trample3, trample4,
  33                 trample5, trample6, trample7, trample8);
  34
  35         void*   result  = (void*)((intptr_t)a1 + (intptr_t)a2);
  36
  37         printf("0x%08x 0x%08x: 0x%08x\n",
  38                (unsigned int)(uintptr_t) a1,
  39                (unsigned int)(uintptr_t) a2,
  40                (unsigned int)(uintptr_t) result);
  41
  42         return result;
  43 }
  44
  45 void* cls_pointer_fn1(void* a1, void* a2)
  46 {
  47         long double     trample1        = (intptr_t)a1 + (intptr_t)a2;
  48         char            trample2        = ((char*)&a1)[0] + ((char*)&a2)[0];
  49         long double     trample3        = (intptr_t)trample1 + (intptr_t)a1;
  50         char            trample4        = trample2 + ((char*)&a1)[1];
  51         long double     trample5        = (intptr_t)trample3 + (intptr_t)a2;
  52         char            trample6        = trample4 + ((char*)&a2)[1];
  53         long double     trample7        = (intptr_t)trample5 + (intptr_t)trample1;
  54         char            trample8        = trample6 + trample2;
  55
  56         dummyVar        = dummy_func(trample1, trample2, trample3, trample4,
  57                 trample5, trample6, trample7, trample8);
  58
  59         void*   result  = (void*)((intptr_t)a1 + (intptr_t)a2);
  60
  61         printf("0x%08x 0x%08x: 0x%08x\n",
  62                (unsigned int)(intptr_t) a1,
  63                (unsigned int)(intptr_t) a2,
  64                (unsigned int)(intptr_t) result);
  65
  66         result  = cls_pointer_fn2(result, a1);
  67
  68         return result;
  69 }
  70
  71 static void
  72 cls_pointer_gn(ffi_cif* cif __UNUSED__, void* resp,
  73                void** args, void* userdata __UNUSED__)
  74 {
  75         void*   a1      = *(void**)(args[0]);
  76         void*   a2      = *(void**)(args[1]);
  77
  78         long double     trample1        = (intptr_t)a1 + (intptr_t)a2;
  79         char            trample2        = ((char*)&a1)[0] + ((char*)&a2)[0];
  80         long double     trample3        = (intptr_t)trample1 + (intptr_t)a1;
  81         char            trample4        = trample2 + ((char*)&a1)[1];
  82         long double     trample5        = (intptr_t)trample3 + (intptr_t)a2;
  83         char            trample6        = trample4 + ((char*)&a2)[1];
  84         long double     trample7        = (intptr_t)trample5 + (intptr_t)trample1;
  85         char            trample8        = trample6 + trample2;
  86
  87         dummyVar        = dummy_func(trample1, trample2, trample3, trample4,
  88                 trample5, trample6, trample7, trample8);
  89
  90         *(void**)resp = cls_pointer_fn1(a1, a2);
  91 }
  92
  93 int main (void)
  94 {
  95         ffi_cif cif;
  96         void *code;
  97         ffi_closure*    pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
  98         void*                   args[3];
  99 //      ffi_type                cls_pointer_type;
 100         ffi_type*               arg_types[3];
 101
 102 /*      cls_pointer_type.size = sizeof(void*);
 103         cls_pointer_type.alignment = 0;
 104         cls_pointer_type.type = FFI_TYPE_POINTER;
 105         cls_pointer_type.elements = NULL;*/
 106
 107         void*   arg1    = (void*)0x01234567;
 108         void*   arg2    = (void*)0x89abcdef;
 109         ffi_arg res             = 0;
 110
 111         arg_types[0] = &ffi_type_pointer;
 112         arg_types[1] = &ffi_type_pointer;
 113         arg_types[2] = NULL;
 114
 115         CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &ffi_type_pointer,
 116                 arg_types) == FFI_OK);
 117
 118         args[0] = &arg1;
 119         args[1] = &arg2;
 120         args[2] = NULL;
 121
 122         printf("\n");
 123         ffi_call(&cif, FFI_FN(cls_pointer_fn1), &res, args);
 124
 125         printf("res: 0x%08x\n", (unsigned int) res);
 126         // { dg-output "\n0x01234567 0x89abcdef: 0x8acf1356" }
 127         // { dg-output "\n0x8acf1356 0x01234567: 0x8bf258bd" }
 128         // { dg-output "\nres: 0x8bf258bd" }
 129
 130         CHECK(ffi_prep_closure_loc(pcl, &cif, cls_pointer_gn, NULL, code) == FFI_OK);
 131
 132         res = (ffi_arg)((void*(*)(void*, void*))(code))(arg1, arg2);
 133
 134         printf("res: 0x%08x\n", (unsigned int) res);
 135         // { dg-output "\n0x01234567 0x89abcdef: 0x8acf1356" }
 136         // { dg-output "\n0x8acf1356 0x01234567: 0x8bf258bd" }
 137         // { dg-output "\nres: 0x8bf258bd" }
 138
 139         exit(0);
 140 }