1 // Tests for the cfi-vcall feature:
2 // RUN: %clang_cc1 -flto -flto-unit -triple x86_64-unknown-linux -fvisibility hidden -fsanitize=cfi-vcall -fsanitize-trap=cfi-vcall -emit-llvm -o - %s | FileCheck --check-prefix=CFI --check-prefix=CFI-NVT --check-prefix=ITANIUM --check-prefix=TT-ITANIUM --check-prefix=NDIAG %s
3 // RUN: %clang_cc1 -flto -flto-unit -triple x86_64-unknown-linux -fvisibility hidden -fsanitize=cfi-vcall -emit-llvm -o - %s | FileCheck --check-prefix=CFI --check-prefix=CFI-NVT --check-prefix=ITANIUM --check-prefix=TT-ITANIUM --check-prefix=ITANIUM-DIAG --check-prefix=DIAG --check-prefix=DIAG-ABORT %s
4 // RUN: %clang_cc1 -flto -flto-unit -triple x86_64-unknown-linux -fvisibility hidden -fsanitize=cfi-vcall -fsanitize-recover=cfi-vcall -emit-llvm -o - %s | FileCheck --check-prefix=CFI --check-prefix=CFI-NVT --check-prefix=ITANIUM --check-prefix=TT-ITANIUM --check-prefix=ITANIUM-DIAG --check-prefix=DIAG --check-prefix=DIAG-RECOVER %s
5 // RUN: %clang_cc1 -flto -flto-unit -triple x86_64-pc-windows-msvc -fsanitize=cfi-vcall -fsanitize-trap=cfi-vcall -emit-llvm -o - %s | FileCheck --check-prefix=CFI --check-prefix=CFI-NVT --check-prefix=MS --check-prefix=TT-MS --check-prefix=NDIAG %s
6 
7 // Tests for the whole-program-vtables feature:
8 // RUN: %clang_cc1 -flto -flto-unit -triple x86_64-unknown-linux -fvisibility hidden -fwhole-program-vtables -emit-llvm -o - %s | FileCheck --check-prefix=VTABLE-OPT --check-prefix=ITANIUM --check-prefix=TT-ITANIUM %s
9 // RUN: %clang_cc1 -flto -flto-unit -triple x86_64-pc-windows-msvc -fwhole-program-vtables -emit-llvm -o - %s | FileCheck --check-prefix=VTABLE-OPT --check-prefix=MS --check-prefix=TT-MS %s
10 
11 // Tests for cfi + whole-program-vtables:
12 // RUN: %clang_cc1 -flto -flto-unit -triple x86_64-unknown-linux -fvisibility hidden -fsanitize=cfi-vcall -fsanitize-trap=cfi-vcall -fwhole-program-vtables -emit-llvm -o - %s | FileCheck --check-prefix=CFI --check-prefix=CFI-VT --check-prefix=ITANIUM --check-prefix=TC-ITANIUM %s
13 // RUN: %clang_cc1 -flto -flto-unit -triple x86_64-pc-windows-msvc -fsanitize=cfi-vcall -fsanitize-trap=cfi-vcall -fwhole-program-vtables -emit-llvm -o - %s | FileCheck --check-prefix=CFI --check-prefix=CFI-VT --check-prefix=MS --check-prefix=TC-MS %s
14 
15 // ITANIUM: @_ZTV1A = {{[^!]*}}, !type [[A16:![0-9]+]]
16 // ITANIUM-DIAG-SAME: !type [[ALL16:![0-9]+]]
17 // ITANIUM-SAME: !type [[AF16:![0-9]+]]
18 
19 // ITANIUM: @_ZTV1B = {{[^!]*}}, !type [[A32:![0-9]+]]
20 // ITANIUM-DIAG-SAME: !type [[ALL32:![0-9]+]]
21 // ITANIUM-SAME: !type [[AF32:![0-9]+]]
22 // ITANIUM-SAME: !type [[AF40:![0-9]+]]
23 // ITANIUM-SAME: !type [[AF48:![0-9]+]]
24 // ITANIUM-SAME: !type [[B32:![0-9]+]]
25 // ITANIUM-DIAG-SAME: !type [[ALL32]]
26 // ITANIUM-SAME: !type [[BF32:![0-9]+]]
27 // ITANIUM-SAME: !type [[BF40:![0-9]+]]
28 // ITANIUM-SAME: !type [[BF48:![0-9]+]]
29 
30 // ITANIUM: @_ZTV1C = {{[^!]*}}, !type [[A32]]
31 // ITANIUM-DIAG-SAME: !type [[ALL32]]
32 // ITANIUM-SAME: !type [[AF32]]
33 // ITANIUM-SAME: !type [[C32:![0-9]+]]
34 // ITANIUM-DIAG-SAME: !type [[ALL32]]
35 // ITANIUM-SAME: !type [[CF32:![0-9]+]]
36 
37 // DIAG: @[[SRC:.*]] = private unnamed_addr constant [{{.*}} x i8] c"{{.*}}type-metadata.cpp\00", align 1
38 // DIAG: @[[TYPE:.*]] = private unnamed_addr constant { i16, i16, [4 x i8] } { i16 -1, i16 0, [4 x i8] c"'A'\00" }
39 // DIAG: @[[BADTYPESTATIC:.*]] = private unnamed_addr global { i8, { [{{.*}} x i8]*, i32, i32 }, { i16, i16, [4 x i8] }* } { i8 0, { [{{.*}} x i8]*, i32, i32 } { [{{.*}} x i8]* @[[SRC]], i32 123, i32 3 }, { i16, i16, [4 x i8] }* @[[TYPE]] }
40 
41 // ITANIUM: @_ZTVN12_GLOBAL__N_11DE = {{[^!]*}}, !type [[A32]]
42 // ITANIUM-DIAG-SAME: !type [[ALL32]]
43 // ITANIUM-SAME: !type [[AF32]]
44 // ITANIUM-SAME: !type [[AF40]]
45 // ITANIUM-SAME: !type [[AF48]]
46 // ITANIUM-SAME: !type [[B32]]
47 // ITANIUM-DIAG-SAME: !type [[ALL32]]
48 // ITANIUM-SAME: !type [[BF32]]
49 // ITANIUM-SAME: !type [[BF40]]
50 // ITANIUM-SAME: !type [[BF48]]
51 // ITANIUM-SAME: !type [[C88:![0-9]+]]
52 // ITANIUM-DIAG-SAME: !type [[ALL88:![0-9]+]]
53 // ITANIUM-SAME: !type [[CF32]]
54 // ITANIUM-SAME: !type [[CF40:![0-9]+]]
55 // ITANIUM-SAME: !type [[CF48:![0-9]+]]
56 // ITANIUM-SAME: !type [[D32:![0-9]+]]
57 // ITANIUM-DIAG-SAME: !type [[ALL32]]
58 // ITANIUM-SAME: !type [[DF32:![0-9]+]]
59 // ITANIUM-SAME: !type [[DF40:![0-9]+]]
60 // ITANIUM-SAME: !type [[DF48:![0-9]+]]
61 
62 // ITANIUM: @_ZTCN12_GLOBAL__N_11DE0_1B = {{[^!]*}}, !type [[A32]]
63 // ITANIUM-DIAG-SAME: !type [[ALL32]]
64 // ITANIUM-SAME: !type [[B32]]
65 // ITANIUM-DIAG-SAME: !type [[ALL32]]
66 
67 // ITANIUM: @_ZTCN12_GLOBAL__N_11DE8_1C = {{[^!]*}}, !type [[A64:![0-9]+]]
68 // ITANIUM-DIAG-SAME: !type [[ALL64:![0-9]+]]
69 // ITANIUM-SAME: !type [[AF64:![0-9]+]]
70 // ITANIUM-SAME: !type [[C32]]
71 // ITANIUM-DIAG-SAME: !type [[ALL32]]
72 // ITANIUM-SAME: !type [[CF64:![0-9]+]]
73 
74 // ITANIUM: @_ZTVZ3foovE2FA = {{[^!]*}}, !type [[A16]]
75 // ITANIUM-DIAG-SAME: !type [[ALL16]]
76 // ITANIUM-SAME: !type [[AF16]]
77 // ITANIUM-SAME: !type [[FA16:![0-9]+]]
78 // ITANIUM-DIAG-SAME: !type [[ALL16]]
79 // ITANIUM-SAME: !type [[FAF16:![0-9]+]]
80 
81 // MS: comdat($"??_7A@@6B@"), !type [[A8:![0-9]+]]
82 // MS: comdat($"??_7B@@6B0@@"), !type [[B8:![0-9]+]]
83 // MS: comdat($"??_7B@@6BA@@@"), !type [[A8]]
84 // MS: comdat($"??_7C@@6B@"), !type [[A8]]
85 // MS: comdat($"??_7D@?A0x{{[^@]*}}@@6BB@@@"), !type [[B8]], !type [[D8:![0-9]+]]
86 // MS: comdat($"??_7D@?A0x{{[^@]*}}@@6BA@@@"), !type [[A8]]
87 // MS: comdat($"??_7FA@?1??foo@@YAXXZ@6B@"), !type [[A8]], !type [[FA8:![0-9]+]]
88 
89 struct A {
90   A();
91   virtual void f();
92 };
93 
94 struct B : virtual A {
95   B();
96   virtual void g();
97   virtual void h();
98 };
99 
100 struct C : virtual A {
101   C();
102 };
103 
104 namespace {
105 
106 struct D : B, C {
107   D();
108   virtual void f();
109   virtual void h();
110 };
111 
112 }
113 
114 A::A() {}
115 B::B() {}
116 C::C() {}
117 D::D() {}
118 
119 void A::f() {
120 }
121 
122 void B::g() {
123 }
124 
125 void D::f() {
126 }
127 
128 void D::h() {
129 }
130 
131 // ITANIUM: define hidden void @_Z2afP1A
132 // MS: define dso_local void @"?af@@YAXPEAUA@@@Z"
133 void af(A *a) {
134   // TT-ITANIUM: [[P:%[^ ]*]] = call i1 @llvm.type.test(i8* [[VT:%[^ ]*]], metadata !"_ZTS1A")
135   // TT-MS: [[P:%[^ ]*]] = call i1 @llvm.type.test(i8* [[VT:%[^ ]*]], metadata !"?AUA@@")
136   // TC-ITANIUM: [[PAIR:%[^ ]*]] = call { i8*, i1 } @llvm.type.checked.load(i8* {{%[^ ]*}}, i32 0, metadata !"_ZTS1A")
137   // TC-MS: [[PAIR:%[^ ]*]] = call { i8*, i1 } @llvm.type.checked.load(i8* {{%[^ ]*}}, i32 0, metadata !"?AUA@@")
138   // CFI-VT: [[P:%[^ ]*]] = extractvalue { i8*, i1 } [[PAIR]], 1
139   // DIAG-NEXT: [[VTVALID0:%[^ ]*]] = call i1 @llvm.type.test(i8* [[VT]], metadata !"all-vtables")
140   // VTABLE-OPT: call void @llvm.assume(i1 [[P]])
141   // CFI-NEXT: br i1 [[P]], label %[[CONTBB:[^ ,]*]], label %[[TRAPBB:[^ ,]*]]
142   // CFI-NEXT: {{^$}}
143 
144   // CFI: [[TRAPBB]]
145   // NDIAG-NEXT: call void @llvm.trap()
146   // NDIAG-NEXT: unreachable
147   // DIAG-NEXT: [[VTINT:%[^ ]*]] = ptrtoint i8* [[VT]] to i64
148   // DIAG-NEXT: [[VTVALID:%[^ ]*]] = zext i1 [[VTVALID0]] to i64
149   // DIAG-ABORT-NEXT: call void @__ubsan_handle_cfi_check_fail_abort(i8* getelementptr inbounds ({{.*}} @[[BADTYPESTATIC]], i32 0, i32 0), i64 [[VTINT]], i64 [[VTVALID]])
150   // DIAG-ABORT-NEXT: unreachable
151   // DIAG-RECOVER-NEXT: call void @__ubsan_handle_cfi_check_fail(i8* getelementptr inbounds ({{.*}} @[[BADTYPESTATIC]], i32 0, i32 0), i64 [[VTINT]], i64 [[VTVALID]])
152   // DIAG-RECOVER-NEXT: br label %[[CONTBB]]
153 
154   // CFI: [[CONTBB]]
155   // CFI-NVT: [[PTR:%[^ ]*]] = load
156   // CFI-VT: [[PTRI8:%[^ ]*]] = extractvalue { i8*, i1 } [[PAIR]], 0
157   // CFI-VT: [[PTR:%[^ ]*]] = bitcast i8* [[PTRI8]] to
158   // CFI: call void [[PTR]]
159 #line 123
160   a->f();
161 }
162 
163 // ITANIUM: define internal void @_Z3df1PN12_GLOBAL__N_11DE
164 // MS: define internal void @"?df1@@YAXPEAUD@?A0x{{[^@]*}}@@@Z"
165 void df1(D *d) {
166   // TT-ITANIUM: {{%[^ ]*}} = call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata ![[DTYPE:[0-9]+]])
167   // TT-MS: {{%[^ ]*}} = call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"?AUA@@")
168   // TC-ITANIUM: {{%[^ ]*}} = call { i8*, i1 } @llvm.type.checked.load(i8* {{%[^ ]*}}, i32 0, metadata ![[DTYPE:[0-9]+]])
169   // TC-MS: {{%[^ ]*}} = call { i8*, i1 } @llvm.type.checked.load(i8* {{%[^ ]*}}, i32 0, metadata !"?AUA@@")
170   d->f();
171 }
172 
173 // ITANIUM: define internal void @_Z3dg1PN12_GLOBAL__N_11DE
174 // MS: define internal void @"?dg1@@YAXPEAUD@?A0x{{[^@]*}}@@@Z"
175 void dg1(D *d) {
176   // TT-ITANIUM: {{%[^ ]*}} = call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
177   // TT-MS: {{%[^ ]*}} = call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"?AUB@@")
178   // TC-ITANIUM: {{%[^ ]*}} = call { i8*, i1 } @llvm.type.checked.load(i8* {{%[^ ]*}}, i32 8, metadata !"_ZTS1B")
179   // TC-MS: {{%[^ ]*}} = call { i8*, i1 } @llvm.type.checked.load(i8* {{%[^ ]*}}, i32 0, metadata !"?AUB@@")
180   d->g();
181 }
182 
183 // ITANIUM: define internal void @_Z3dh1PN12_GLOBAL__N_11DE
184 // MS: define internal void @"?dh1@@YAXPEAUD@?A0x{{[^@]*}}@@@Z"
185 void dh1(D *d) {
186   // TT-ITANIUM: {{%[^ ]*}} = call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata ![[DTYPE]])
187   // TT-MS: {{%[^ ]*}} = call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata ![[DTYPE:[0-9]+]])
188   // TC-ITANIUM: {{%[^ ]*}} = call { i8*, i1 } @llvm.type.checked.load(i8* {{%[^ ]*}}, i32 16, metadata ![[DTYPE]])
189   // TC-MS: {{%[^ ]*}} = call { i8*, i1 } @llvm.type.checked.load(i8* {{%[^ ]*}}, i32 8, metadata ![[DTYPE:[0-9]+]])
190   d->h();
191 }
192 
193 // ITANIUM: define internal void @_Z3df2PN12_GLOBAL__N_11DE
194 // MS: define internal void @"?df2@@YAXPEAUD@?A0x{{[^@]*}}@@@Z"
195 __attribute__((no_sanitize("cfi")))
196 void df2(D *d) {
197   // CFI-NVT-NOT: call i1 @llvm.type.test
198   // CFI-VT: [[P:%[^ ]*]] = call i1 @llvm.type.test
199   // CFI-VT: call void @llvm.assume(i1 [[P]])
200   d->f();
201 }
202 
203 // ITANIUM: define internal void @_Z3df3PN12_GLOBAL__N_11DE
204 // MS: define internal void @"?df3@@YAXPEAUD@?A0x{{[^@]*}}@@@Z"
205 __attribute__((no_sanitize("address"))) __attribute__((no_sanitize("cfi-vcall")))
206 void df3(D *d) {
207   // CFI-NVT-NOT: call i1 @llvm.type.test
208   // CFI-VT: [[P:%[^ ]*]] = call i1 @llvm.type.test
209   // CFI-VT: call void @llvm.assume(i1 [[P]])
210   d->f();
211 }
212 
213 D d;
214 
215 void foo() {
216   df1(&d);
217   dg1(&d);
218   dh1(&d);
219   df2(&d);
220   df3(&d);
221 
222   struct FA : A {
223     void f() {}
224   } fa;
225   af(&fa);
226 }
227 
228 namespace test2 {
229 
230 struct A {
231   virtual void m_fn1();
232 };
233 struct B {
234   virtual void m_fn2();
235 };
236 struct C : B, A {};
237 struct D : C {
238   void m_fn1();
239 };
240 
241 // ITANIUM: define hidden void @_ZN5test21fEPNS_1DE
242 // MS: define dso_local void @"?f@test2@@YAXPEAUD@1@@Z"
243 void f(D *d) {
244   // TT-ITANIUM: {{%[^ ]*}} = call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"_ZTSN5test21DE")
245   // TT-MS: {{%[^ ]*}} = call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"?AUA@test2@@")
246   // TC-ITANIUM: {{%[^ ]*}} = call { i8*, i1 } @llvm.type.checked.load(i8* {{%[^ ]*}}, i32 8, metadata !"_ZTSN5test21DE")
247   // TC-MS: {{%[^ ]*}} = call { i8*, i1 } @llvm.type.checked.load(i8* {{%[^ ]*}}, i32 0, metadata !"?AUA@test2@@")
248   d->m_fn1();
249 }
250 
251 }
252 
253 // ITANIUM: [[A16]] = !{i64 16, !"_ZTS1A"}
254 // ITANIUM-DIAG: [[ALL16]] = !{i64 16, !"all-vtables"}
255 // ITANIUM: [[AF16]] = !{i64 16, !"_ZTSM1AFvvE.virtual"}
256 // ITANIUM: [[A32]] = !{i64 32, !"_ZTS1A"}
257 // ITANIUM-DIAG: [[ALL32]] = !{i64 32, !"all-vtables"}
258 // ITANIUM: [[AF32]] = !{i64 32, !"_ZTSM1AFvvE.virtual"}
259 // ITANIUM: [[AF40]] = !{i64 40, !"_ZTSM1AFvvE.virtual"}
260 // ITANIUM: [[AF48]] = !{i64 48, !"_ZTSM1AFvvE.virtual"}
261 // ITANIUM: [[B32]] = !{i64 32, !"_ZTS1B"}
262 // ITANIUM: [[BF32]] = !{i64 32, !"_ZTSM1BFvvE.virtual"}
263 // ITANIUM: [[BF40]] = !{i64 40, !"_ZTSM1BFvvE.virtual"}
264 // ITANIUM: [[BF48]] = !{i64 48, !"_ZTSM1BFvvE.virtual"}
265 // ITANIUM: [[C32]] = !{i64 32, !"_ZTS1C"}
266 // ITANIUM: [[CF32]] = !{i64 32, !"_ZTSM1CFvvE.virtual"}
267 // ITANIUM: [[C88]] = !{i64 88, !"_ZTS1C"}
268 // ITANIUM-DIAG: [[ALL88]] = !{i64 88, !"all-vtables"}
269 // ITANIUM: [[CF40]] = !{i64 40, !"_ZTSM1CFvvE.virtual"}
270 // ITANIUM: [[CF48]] = !{i64 48, !"_ZTSM1CFvvE.virtual"}
271 // ITANIUM: [[D32]] = !{i64 32, [[D_ID:![0-9]+]]}
272 // ITANIUM: [[D_ID]] = distinct !{}
273 // ITANIUM: [[DF32]] = !{i64 32, [[DF_ID:![0-9]+]]}
274 // ITANIUM: [[DF_ID]] = distinct !{}
275 // ITANIUM: [[DF40]] = !{i64 40, [[DF_ID]]}
276 // ITANIUM: [[DF48]] = !{i64 48, [[DF_ID]]}
277 // ITANIUM: [[A64]] = !{i64 64, !"_ZTS1A"}
278 // ITANIUM-DIAG: [[ALL64]] = !{i64 64, !"all-vtables"}
279 // ITANIUM: [[AF64]] = !{i64 64, !"_ZTSM1AFvvE.virtual"}
280 // ITANIUM: [[CF64]] = !{i64 64, !"_ZTSM1CFvvE.virtual"}
281 // ITANIUM: [[FA16]] = !{i64 16, [[FA_ID:![0-9]+]]}
282 // ITANIUM: [[FA_ID]] = distinct !{}
283 // ITANIUM: [[FAF16]] = !{i64 16, [[FAF_ID:![0-9]+]]}
284 // ITANIUM: [[FAF_ID]] = distinct !{}
285 
286 // MS: [[A8]] = !{i64 8, !"?AUA@@"}
287 // MS: [[B8]] = !{i64 8, !"?AUB@@"}
288 // MS: [[D8]] = !{i64 8, [[D_ID:![0-9]+]]}
289 // MS: [[D_ID]] = distinct !{}
290 // MS: [[FA8]] = !{i64 8, [[FA_ID:![0-9]+]]}
291 // MS: [[FA_ID]] = distinct !{}
292