1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
|
// RUN: %clang_cc1 -std=c++11 -triple x86_64-apple-darwin10 -emit-llvm -o - %s -fsanitize=alignment | FileCheck %s --check-prefixes=CHECK,ALIGN
// RUN: %clang_cc1 -std=c++11 -triple x86_64-apple-darwin10 -emit-llvm -o - %s -fsanitize=null | FileCheck %s --check-prefixes=CHECK,NULL
// RUN: %clang_cc1 -std=c++11 -triple x86_64-apple-darwin10 -emit-llvm -o - %s -fsanitize=alignment,null -DCHECK_LAMBDA | FileCheck %s --check-prefixes=LAMBDA
// CHECK-LABEL: define void @_Z22load_non_null_pointersv
void load_non_null_pointers() {
int var;
var = *&var;
int arr[1];
arr[0] = arr[0];
char c = "foo"[0];
// CHECK-NOT: and i64 {{.*}}, !nosanitize
// CHECK-NOT: icmp ne {{.*}}, null, !nosanitize
// CHECK: ret void
}
// CHECK-LABEL: define void @_Z31use_us16_aligned_array_elementsv
void use_us16_aligned_array_elements() {
static const unsigned short Arr[] = {0, 1, 2};
auto use_array = [](const unsigned short(&X)[3]) -> void {};
use_array(Arr);
// CHECK-NOT: br i1 true
// ALIGN-NOT: call void @__ubsan_handle_type_mismatch
// CHECK: ret void
}
struct A {
int foo;
// CHECK-LABEL: define linkonce_odr void @_ZN1A10do_nothingEv
void do_nothing() {
// ALIGN: %[[THISINT1:[0-9]+]] = ptrtoint %struct.A* %{{.*}} to i64, !nosanitize
// ALIGN: and i64 %[[THISINT1]], 3, !nosanitize
// NULL: icmp ne %struct.A* %[[THIS1:[a-z0-9]+]], null, !nosanitize
// NULL: ptrtoint %struct.A* %[[THIS1]] to i64, !nosanitize
// CHECK: call void @__ubsan_handle_type_mismatch
// CHECK-NOT: call void @__ubsan_handle_type_mismatch
// CHECK: ret void
}
#ifdef CHECK_LAMBDA
// LAMBDA-LABEL: define linkonce_odr void @_ZN1A22do_nothing_with_lambdaEv
void do_nothing_with_lambda() {
// LAMBDA: icmp ne %struct.A* %[[THIS2:[a-z0-9]+]], null, !nosanitize
// LAMBDA: %[[THISINT2:[0-9]+]] = ptrtoint %struct.A* %[[THIS2]] to i64, !nosanitize
// LAMBDA: and i64 %[[THISINT2]], 3, !nosanitize
// LAMBDA: call void @__ubsan_handle_type_mismatch
auto f = [&] {
foo = 0;
};
f();
// LAMBDA-NOT: call void @__ubsan_handle_type_mismatch
// LAMBDA: ret void
}
// Check the IR for the lambda:
//
// LAMBDA-LABEL: define linkonce_odr void @_ZZN1A22do_nothing_with_lambdaEvENKUlvE_clEv
// LAMBDA: call void @__ubsan_handle_type_mismatch
// LAMBDA-NOT: call void @__ubsan_handle_type_mismatch
// LAMBDA: ret void
#endif
// CHECK-LABEL: define linkonce_odr i32 @_ZN1A11load_memberEv
int load_member() {
// ALIGN: %[[THISINT3:[0-9]+]] = ptrtoint %struct.A* %{{.*}} to i64, !nosanitize
// ALIGN: and i64 %[[THISINT3]], 3, !nosanitize
// NULL: icmp ne %struct.A* %[[THIS3:[a-z0-9]+]], null, !nosanitize
// NULL: ptrtoint %struct.A* %[[THIS3]] to i64, !nosanitize
// CHECK: call void @__ubsan_handle_type_mismatch
// CHECK-NOT: call void @__ubsan_handle_type_mismatch
return foo;
// CHECK: ret i32
}
// CHECK-LABEL: define linkonce_odr i32 @_ZN1A11call_methodEv
int call_method() {
// ALIGN: %[[THISINT4:[0-9]+]] = ptrtoint %struct.A* %{{.*}} to i64, !nosanitize
// ALIGN: and i64 %[[THISINT4]], 3, !nosanitize
// NULL: icmp ne %struct.A* %[[THIS4:[a-z0-9]+]], null, !nosanitize
// NULL: ptrtoint %struct.A* %[[THIS4]] to i64, !nosanitize
// CHECK: call void @__ubsan_handle_type_mismatch
// CHECK-NOT: call void @__ubsan_handle_type_mismatch
return load_member();
// CHECK: ret i32
}
// CHECK-LABEL: define linkonce_odr void @_ZN1A15assign_member_1Ev
void assign_member_1() {
// ALIGN: %[[THISINT5:[0-9]+]] = ptrtoint %struct.A* %{{.*}} to i64, !nosanitize
// ALIGN: and i64 %[[THISINT5]], 3, !nosanitize
// NULL: icmp ne %struct.A* %[[THIS5:[a-z0-9]+]], null, !nosanitize
// NULL: ptrtoint %struct.A* %[[THIS5]] to i64, !nosanitize
// CHECK: call void @__ubsan_handle_type_mismatch
// CHECK-NOT: call void @__ubsan_handle_type_mismatch
foo = 0;
// CHECK: ret void
}
// CHECK-LABEL: define linkonce_odr void @_ZN1A15assign_member_2Ev
void assign_member_2() {
// ALIGN: %[[THISINT6:[0-9]+]] = ptrtoint %struct.A* %{{.*}} to i64, !nosanitize
// ALIGN: and i64 %[[THISINT6]], 3, !nosanitize
// NULL: icmp ne %struct.A* %[[THIS6:[a-z0-9]+]], null, !nosanitize
// NULL: ptrtoint %struct.A* %[[THIS6]] to i64, !nosanitize
// CHECK: call void @__ubsan_handle_type_mismatch
// CHECK-NOT: call void @__ubsan_handle_type_mismatch
(__extension__ (this))->foo = 0;
// CHECK: ret void
}
// CHECK-LABEL: define linkonce_odr void @_ZNK1A15assign_member_3Ev
void assign_member_3() const {
// ALIGN: %[[THISINT7:[0-9]+]] = ptrtoint %struct.A* %{{.*}} to i64, !nosanitize
// ALIGN: and i64 %[[THISINT7]], 3, !nosanitize
// NULL: icmp ne %struct.A* %[[THIS7:[a-z0-9]+]], null, !nosanitize
// NULL: ptrtoint %struct.A* %[[THIS7]] to i64, !nosanitize
// CHECK: call void @__ubsan_handle_type_mismatch
// CHECK-NOT: call void @__ubsan_handle_type_mismatch
const_cast<A *>(this)->foo = 0;
// CHECK: ret void
}
// CHECK-LABEL: define linkonce_odr i32 @_ZN1A22call_through_referenceERS_
static int call_through_reference(A &a) {
// ALIGN: %[[OBJINT:[0-9]+]] = ptrtoint %struct.A* %{{.*}} to i64, !nosanitize
// ALIGN: and i64 %[[OBJINT]], 3, !nosanitize
// ALIGN: call void @__ubsan_handle_type_mismatch
// NULL-NOT: call void @__ubsan_handle_type_mismatch
return a.load_member();
// CHECK: ret i32
}
// CHECK-LABEL: define linkonce_odr i32 @_ZN1A20call_through_pointerEPS_
static int call_through_pointer(A *a) {
// CHECK: call void @__ubsan_handle_type_mismatch
return a->load_member();
// CHECK: ret i32
}
};
struct B {
operator A*() const { return nullptr; }
// CHECK-LABEL: define linkonce_odr i32 @_ZN1B11load_memberEPS_
static int load_member(B *bp) {
// Check &b before converting it to an A*.
// CHECK: call void @__ubsan_handle_type_mismatch
//
// Check the result of the conversion before using it.
// NULL: call void @__ubsan_handle_type_mismatch
//
// CHECK-NOT: call void @__ubsan_handle_type_mismatch
return static_cast<A *>(*bp)->load_member();
// CHECK: ret i32
}
};
struct Base {
int foo;
virtual int load_member_1() = 0;
};
struct Derived : public Base {
int bar;
// CHECK-LABEL: define linkonce_odr i32 @_ZN7Derived13load_member_2Ev
int load_member_2() {
// ALIGN: %[[THISINT8:[0-9]+]] = ptrtoint %struct.Derived* %{{.*}} to i64, !nosanitize
// ALIGN: and i64 %[[THISINT8]], 7, !nosanitize
// ALIGN: call void @__ubsan_handle_type_mismatch
// NULL: icmp ne %struct.Derived* %[[THIS8:[a-z0-9]+]], null, !nosanitize
// NULL: ptrtoint %struct.Derived* %[[THIS8]] to i64, !nosanitize
// CHECK: call void @__ubsan_handle_type_mismatch
//
// Check the result of the cast before using it.
// CHECK: call void @__ubsan_handle_type_mismatch
//
// CHECK-NOT: call void @__ubsan_handle_type_mismatch
return dynamic_cast<Base *>(this)->load_member_1();
// CHECK: ret i32
}
// CHECK-LABEL: define linkonce_odr i32 @_ZN7Derived13load_member_3Ev
int load_member_3() {
// ALIGN: %[[THISINT9:[0-9]+]] = ptrtoint %struct.Derived* %{{.*}} to i64, !nosanitize
// ALIGN: and i64 %[[THISINT9]], 7, !nosanitize
// ALIGN: call void @__ubsan_handle_type_mismatch
// ALIGN: call void @__ubsan_handle_type_mismatch
// NULL: icmp ne %struct.Derived* %[[THIS9:[a-z0-9]+]], null, !nosanitize
// NULL: ptrtoint %struct.Derived* %[[THIS9]] to i64, !nosanitize
// CHECK: call void @__ubsan_handle_type_mismatch
// CHECK-NOT: call void @__ubsan_handle_type_mismatch
return reinterpret_cast<Derived *>(static_cast<Base *>(this))->foo;
// CHECK: ret i32
}
// CHECK-LABEL: define linkonce_odr i32 @_ZN7Derived13load_member_1Ev
int load_member_1() override {
// ALIGN: %[[THISINT10:[0-9]+]] = ptrtoint %struct.Derived* %{{.*}} to i64, !nosanitize
// ALIGN: and i64 %[[THISINT10]], 7, !nosanitize
// ALIGN: call void @__ubsan_handle_type_mismatch
// NULL: icmp ne %struct.Derived* %[[THIS10:[a-z0-9]+]], null, !nosanitize
// NULL: ptrtoint %struct.Derived* %[[THIS10]] to i64, !nosanitize
// CHECK: call void @__ubsan_handle_type_mismatch
// CHECK-NOT: call void @__ubsan_handle_type_mismatch
return foo + bar;
// CHECK: ret i32
}
};
void force_irgen() {
A *a;
a->do_nothing();
#ifdef CHECK_LAMBDA
a->do_nothing_with_lambda();
#endif
a->load_member();
a->call_method();
a->assign_member_1();
a->assign_member_2();
a->assign_member_3();
A::call_through_reference(*a);
A::call_through_pointer(a);
B::load_member(nullptr);
Base *b = new Derived;
b->load_member_1();
Derived *d;
d->load_member_2();
d->load_member_3();
load_non_null_pointers();
use_us16_aligned_array_elements();
}
|
