Ruby 2.7.0p0(2019-12-25revision647ee6f091eafcce70ffb75ddf7e121e192ab217)

cls_pointer_stack.c
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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 void* result;
32
33 dummyVar = dummy_func(trample1, trample2, trample3, trample4,
34 trample5, trample6, trample7, trample8);
35
36 result = (void*)((intptr_t)a1 + (intptr_t)a2);
37
38 printf("0x%08x 0x%08x: 0x%08x\n",
39 (unsigned int)(uintptr_t) a1,
40 (unsigned int)(uintptr_t) a2,
41 (unsigned int)(uintptr_t) result);
42
43 return result;
44 }
45
46 void* cls_pointer_fn1(void* a1, void* a2)
47 {
48 long double trample1 = (intptr_t)a1 + (intptr_t)a2;
49 char trample2 = ((char*)&a1)[0] + ((char*)&a2)[0];
50 long double trample3 = (intptr_t)trample1 + (intptr_t)a1;
51 char trample4 = trample2 + ((char*)&a1)[1];
52 long double trample5 = (intptr_t)trample3 + (intptr_t)a2;
53 char trample6 = trample4 + ((char*)&a2)[1];
54 long double trample7 = (intptr_t)trample5 + (intptr_t)trample1;
55 char trample8 = trample6 + trample2;
56 void* result;
57
58 dummyVar = dummy_func(trample1, trample2, trample3, trample4,
59 trample5, trample6, trample7, trample8);
60
61 result = (void*)((intptr_t)a1 + (intptr_t)a2);
62
63 printf("0x%08x 0x%08x: 0x%08x\n",
64 (unsigned int)(intptr_t) a1,
65 (unsigned int)(intptr_t) a2,
66 (unsigned int)(intptr_t) result);
67
68 result = cls_pointer_fn2(result, a1);
69
70 return result;
71 }
72
73 static void
74 cls_pointer_gn(ffi_cif* cif __UNUSED__, void* resp,
75 void** args, void* userdata __UNUSED__)
76 {
77 void* a1 = *(void**)(args[0]);
78 void* a2 = *(void**)(args[1]);
79
80 long double trample1 = (intptr_t)a1 + (intptr_t)a2;
81 char trample2 = ((char*)&a1)[0] + ((char*)&a2)[0];
82 long double trample3 = (intptr_t)trample1 + (intptr_t)a1;
83 char trample4 = trample2 + ((char*)&a1)[1];
84 long double trample5 = (intptr_t)trample3 + (intptr_t)a2;
85 char trample6 = trample4 + ((char*)&a2)[1];
86 long double trample7 = (intptr_t)trample5 + (intptr_t)trample1;
87 char trample8 = trample6 + trample2;
88
89 dummyVar = dummy_func(trample1, trample2, trample3, trample4,
90 trample5, trample6, trample7, trample8);
91
92 *(void**)resp = cls_pointer_fn1(a1, a2);
93 }
94
95 int main (void)
96 {
97 ffi_cif cif;
98 void *code;
99 ffi_closure* pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
100 void* args[3];
101 /* ffi_type cls_pointer_type; */
102 ffi_type* arg_types[3];
103
104 /* cls_pointer_type.size = sizeof(void*);
105 cls_pointer_type.alignment = 0;
106 cls_pointer_type.type = FFI_TYPE_POINTER;
107 cls_pointer_type.elements = NULL;*/
108
109 void* arg1 = (void*)0x01234567;
110 void* arg2 = (void*)0x89abcdef;
111 ffi_arg res = 0;
112
113 arg_types[0] = &ffi_type_pointer;
114 arg_types[1] = &ffi_type_pointer;
115 arg_types[2] = NULL;
116
117 CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &ffi_type_pointer,
118 arg_types) == FFI_OK);
119
120 args[0] = &arg1;
121 args[1] = &arg2;
122 args[2] = NULL;
123
124 printf("\n");
125 ffi_call(&cif, FFI_FN(cls_pointer_fn1), &res, args);
126
127 printf("res: 0x%08x\n", (unsigned int) res);
128 /* { dg-output "\n0x01234567 0x89abcdef: 0x8acf1356" } */
129 /* { dg-output "\n0x8acf1356 0x01234567: 0x8bf258bd" } */
130 /* { dg-output "\nres: 0x8bf258bd" } */
131
132 CHECK(ffi_prep_closure_loc(pcl, &cif, cls_pointer_gn, NULL, code) == FFI_OK);
133
134 res = (ffi_arg)(uintptr_t)((void*(*)(void*, void*))(code))(arg1, arg2);
135
136 printf("res: 0x%08x\n", (unsigned int) res);
137 /* { dg-output "\n0x01234567 0x89abcdef: 0x8acf1356" } */
138 /* { dg-output "\n0x8acf1356 0x01234567: 0x8bf258bd" } */
139 /* { dg-output "\nres: 0x8bf258bd" } */
140
141 exit(0);
142 }
cls_pointer_fn1
void * cls_pointer_fn1(void *a1, void *a2)
Definition: cls_pointer_stack.c:46
ffi_arg
unsigned long ffi_arg
Definition: ffitarget.h:30
uintptr_t
unsigned int uintptr_t
Definition: win32.h:106
printf
int int int printf(const char *__restrict,...) __attribute__((__format__(__printf__
NULL
#define NULL
Definition: _sdbm.c:101
exit
void exit(int __status) __attribute__((__noreturn__))
dummy_func
long dummy_func(long double a1, char b1, long double a2, char b2, long double a3, char b3, long double a4, char b4)
Definition: cls_pointer_stack.c:12
ffitest.h
cls_pointer_fn2
void * cls_pointer_fn2(void *a1, void *a2)
Definition: cls_pointer_stack.c:21
__UNUSED__
#define __UNUSED__
Definition: ffitest.h:28
CHECK
#define CHECK(sub)
Definition: compile.c:448
FFI_DEFAULT_ABI
@ FFI_DEFAULT_ABI
Definition: ffitarget.h:38
ffi_prep_cif
ffi_status ffi_prep_cif(ffi_cif *cif, ffi_abi abi, unsigned int nargs, ffi_type *rtype, ffi_type **atypes)
Definition: prep_cif.c:226
intptr_t
int intptr_t
Definition: win32.h:90
ffi_call
void ffi_call(ffi_cif *cif, void(*fn)(void), void *rvalue, void **avalue)
Definition: ffi.c:813
ffi_prep_closure_loc
ffi_status ffi_prep_closure_loc(ffi_closure *closure, ffi_cif *cif, void(*fun)(ffi_cif *, void *, void **, void *), void *user_data, void *codeloc)
Definition: ffi.c:928
main
int main(void)
Definition: cls_pointer_stack.c:95