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
|
// RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-linux -emit-llvm -fsanitize=null %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-NULL --check-prefix=ITANIUM
// RUN: %clang_cc1 -std=c++11 -triple x86_64-windows -emit-llvm -fsanitize=null %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-NULL --check-prefix=MSABI
// RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-linux -emit-llvm -fsanitize=null,vptr %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-VPTR --check-prefix=ITANIUM
// RUN: %clang_cc1 -std=c++11 -triple x86_64-windows -emit-llvm -fsanitize=null,vptr %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-VPTR --check-prefix=MSABI --check-prefix=CHECK-VPTR-MS
struct T {
virtual ~T() {}
virtual int v() { return 1; }
};
struct U : T {
~U();
virtual int v() { return 2; }
};
U::~U() {}
// CHECK-VPTR-MS: @__ubsan_vptr_type_cache = external dso_local
// ITANIUM: define i32 @_Z5get_vP1T
// MSABI: define dso_local i32 @"?get_v
int get_v(T* t) {
// First, we check that vtable is not loaded before a type check.
// CHECK-NULL-NOT: load {{.*}} (%struct.T*{{.*}})**, {{.*}} (%struct.T*{{.*}})***
// CHECK-NULL: [[UBSAN_CMP_RES:%[0-9]+]] = icmp ne %struct.T* %{{[_a-z0-9]+}}, null
// CHECK-NULL-NEXT: br i1 [[UBSAN_CMP_RES]], label %{{.*}}, label %{{.*}}
// CHECK-NULL: call void @__ubsan_handle_type_mismatch_v1_abort
// Second, we check that vtable is actually loaded once the type check is done.
// CHECK-NULL: load {{.*}} (%struct.T*{{.*}})**, {{.*}} (%struct.T*{{.*}})***
return t->v();
}
// ITANIUM: define void @_Z9delete_itP1T
// MSABI: define dso_local void @"?delete_it
void delete_it(T *t) {
// First, we check that vtable is not loaded before a type check.
// CHECK-VPTR-NOT: load {{.*}} (%struct.T*{{.*}})**, {{.*}} (%struct.T*{{.*}})***
// CHECK-VPTR: br i1 {{.*}} label %{{.*}}
// CHECK-VPTR: call void @__ubsan_handle_dynamic_type_cache_miss_abort
// Second, we check that vtable is actually loaded once the type check is done.
// CHECK-VPTR: load {{.*}} (%struct.T*{{.*}})**, {{.*}} (%struct.T*{{.*}})***
delete t;
}
// ITANIUM: define %struct.U* @_Z7dyncastP1T
// MSABI: define dso_local %struct.U* @"?dyncast
U* dyncast(T *t) {
// First, we check that dynamic_cast is not called before a type check.
// CHECK-VPTR-NOT: call i8* @__{{dynamic_cast|RTDynamicCast}}
// CHECK-VPTR: br i1 {{.*}} label %{{.*}}
// CHECK-VPTR: call void @__ubsan_handle_dynamic_type_cache_miss_abort
// Second, we check that dynamic_cast is actually called once the type check is done.
// CHECK-VPTR: call i8* @__{{dynamic_cast|RTDynamicCast}}
return dynamic_cast<U*>(t);
}
|
