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-unknown-linux -fwhole-program-vtables -emit-llvm -o - %s | FileCheck --check-prefix=VTABLE-OPT --check-prefix=ITANIUM-DEFAULTVIS --check-prefix=TT-ITANIUM %s
10 // 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
11 
12 // Tests for cfi + whole-program-vtables:
13 // 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
14 // 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
15 
16 // ITANIUM: @_ZTV1A = {{[^!]*}}, !type [[A16:![0-9]+]]
17 // ITANIUM-DIAG-SAME: !type [[ALL16:![0-9]+]]
18 // ITANIUM-SAME: !type [[AF16:![0-9]+]]
19 
20 // ITANIUM: @_ZTV1B = {{[^!]*}}, !type [[A32:![0-9]+]]
21 // ITANIUM-DIAG-SAME: !type [[ALL32:![0-9]+]]
22 // ITANIUM-SAME: !type [[AF32:![0-9]+]]
23 // ITANIUM-SAME: !type [[AF40:![0-9]+]]
24 // ITANIUM-SAME: !type [[AF48:![0-9]+]]
25 // ITANIUM-SAME: !type [[B32:![0-9]+]]
26 // ITANIUM-DIAG-SAME: !type [[ALL32]]
27 // ITANIUM-SAME: !type [[BF32:![0-9]+]]
28 // ITANIUM-SAME: !type [[BF40:![0-9]+]]
29 // ITANIUM-SAME: !type [[BF48:![0-9]+]]
30 
31 // ITANIUM: @_ZTV1C = {{[^!]*}}, !type [[A32]]
32 // ITANIUM-DIAG-SAME: !type [[ALL32]]
33 // ITANIUM-SAME: !type [[AF32]]
34 // ITANIUM-SAME: !type [[C32:![0-9]+]]
35 // ITANIUM-DIAG-SAME: !type [[ALL32]]
36 // ITANIUM-SAME: !type [[CF32:![0-9]+]]
37 
38 // DIAG: @[[SRC:.*]] = private unnamed_addr constant [{{.*}} x i8] c"{{.*}}type-metadata.cpp\00", align 1
39 // DIAG: @[[TYPE:.*]] = private unnamed_addr constant { i16, i16, [4 x i8] } { i16 -1, i16 0, [4 x i8] c"'A'\00" }
40 // 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]] }
41 
42 // ITANIUM: @_ZTVN12_GLOBAL__N_11DE = {{[^!]*}}, !type [[A32]]
43 // ITANIUM-DIAG-SAME: !type [[ALL32]]
44 // ITANIUM-SAME: !type [[AF32]]
45 // ITANIUM-SAME: !type [[AF40]]
46 // ITANIUM-SAME: !type [[AF48]]
47 // ITANIUM-SAME: !type [[B32]]
48 // ITANIUM-DIAG-SAME: !type [[ALL32]]
49 // ITANIUM-SAME: !type [[BF32]]
50 // ITANIUM-SAME: !type [[BF40]]
51 // ITANIUM-SAME: !type [[BF48]]
52 // ITANIUM-SAME: !type [[C88:![0-9]+]]
53 // ITANIUM-DIAG-SAME: !type [[ALL88:![0-9]+]]
54 // ITANIUM-SAME: !type [[CF32]]
55 // ITANIUM-SAME: !type [[CF40:![0-9]+]]
56 // ITANIUM-SAME: !type [[CF48:![0-9]+]]
57 // ITANIUM-SAME: !type [[D32:![0-9]+]]
58 // ITANIUM-DIAG-SAME: !type [[ALL32]]
59 // ITANIUM-SAME: !type [[DF32:![0-9]+]]
60 // ITANIUM-SAME: !type [[DF40:![0-9]+]]
61 // ITANIUM-SAME: !type [[DF48:![0-9]+]]
62 
63 // ITANIUM: @_ZTCN12_GLOBAL__N_11DE0_1B = {{[^!]*}}, !type [[A32]]
64 // ITANIUM-DIAG-SAME: !type [[ALL32]]
65 // ITANIUM-SAME: !type [[B32]]
66 // ITANIUM-DIAG-SAME: !type [[ALL32]]
67 
68 // ITANIUM: @_ZTCN12_GLOBAL__N_11DE8_1C = {{[^!]*}}, !type [[A64:![0-9]+]]
69 // ITANIUM-DIAG-SAME: !type [[ALL64:![0-9]+]]
70 // ITANIUM-SAME: !type [[AF64:![0-9]+]]
71 // ITANIUM-SAME: !type [[C32]]
72 // ITANIUM-DIAG-SAME: !type [[ALL32]]
73 // ITANIUM-SAME: !type [[CF64:![0-9]+]]
74 
75 // ITANIUM: @_ZTVZ3foovE2FA = {{[^!]*}}, !type [[A16]]
76 // ITANIUM-DIAG-SAME: !type [[ALL16]]
77 // ITANIUM-SAME: !type [[AF16]]
78 // ITANIUM-SAME: !type [[FA16:![0-9]+]]
79 // ITANIUM-DIAG-SAME: !type [[ALL16]]
80 // ITANIUM-SAME: !type [[FAF16:![0-9]+]]
81 
82 // MS: comdat($"??_7A@@6B@"), !type [[A8:![0-9]+]]
83 // MS: comdat($"??_7B@@6B0@@"), !type [[B8:![0-9]+]]
84 // MS: comdat($"??_7B@@6BA@@@"), !type [[A8]]
85 // MS: comdat($"??_7C@@6B@"), !type [[A8]]
86 // MS: comdat($"??_7D@?A0x{{[^@]*}}@@6BB@@@"), !type [[B8]], !type [[D8:![0-9]+]]
87 // MS: comdat($"??_7D@?A0x{{[^@]*}}@@6BA@@@"), !type [[A8]]
88 // MS: comdat($"??_7FA@?1??foo@@YAXXZ@6B@"), !type [[A8]], !type [[FA8:![0-9]+]]
89 
90 struct A {
91   A();
92   virtual void f();
93 };
94 
95 struct B : virtual A {
96   B();
97   virtual void g();
98   virtual void h();
99 };
100 
101 struct C : virtual A {
102   C();
103 };
104 
105 namespace {
106 
107 struct D : B, C {
108   D();
109   virtual void f();
110   virtual void h();
111 };
112 
113 }
114 
115 A::A() {}
116 B::B() {}
117 C::C() {}
118 D::D() {}
119 
120 void A::f() {
121 }
122 
123 void B::g() {
124 }
125 
126 void D::f() {
127 }
128 
129 void D::h() {
130 }
131 
132 // ITANIUM: define hidden void @_Z2afP1A
133 // ITANIUM-DEFAULTVIS: define void @_Z2afP1A
134 // MS: define dso_local void @"?af@@YAXPEAUA@@@Z"
135 void af(A *a) {
136   // TT-ITANIUM: [[P:%[^ ]*]] = call i1 @llvm.type.test(i8* [[VT:%[^ ]*]], metadata !"_ZTS1A")
137   // TT-MS: [[P:%[^ ]*]] = call i1 @llvm.type.test(i8* [[VT:%[^ ]*]], metadata !"?AUA@@")
138   // TC-ITANIUM: [[PAIR:%[^ ]*]] = call { i8*, i1 } @llvm.type.checked.load(i8* {{%[^ ]*}}, i32 0, metadata !"_ZTS1A")
139   // TC-MS: [[PAIR:%[^ ]*]] = call { i8*, i1 } @llvm.type.checked.load(i8* {{%[^ ]*}}, i32 0, metadata !"?AUA@@")
140   // CFI-VT: [[P:%[^ ]*]] = extractvalue { i8*, i1 } [[PAIR]], 1
141   // DIAG-NEXT: [[VTVALID0:%[^ ]*]] = call i1 @llvm.type.test(i8* [[VT]], metadata !"all-vtables")
142   // VTABLE-OPT: call void @llvm.assume(i1 [[P]])
143   // CFI-NEXT: br i1 [[P]], label %[[CONTBB:[^ ,]*]], label %[[TRAPBB:[^ ,]*]]
144   // CFI-NEXT: {{^$}}
145 
146   // CFI: [[TRAPBB]]
147   // NDIAG-NEXT: call void @llvm.trap()
148   // NDIAG-NEXT: unreachable
149   // DIAG-NEXT: [[VTINT:%[^ ]*]] = ptrtoint i8* [[VT]] to i64
150   // DIAG-NEXT: [[VTVALID:%[^ ]*]] = zext i1 [[VTVALID0]] to i64
151   // DIAG-ABORT-NEXT: call void @__ubsan_handle_cfi_check_fail_abort(i8* getelementptr inbounds ({{.*}} @[[BADTYPESTATIC]], i32 0, i32 0), i64 [[VTINT]], i64 [[VTVALID]])
152   // DIAG-ABORT-NEXT: unreachable
153   // DIAG-RECOVER-NEXT: call void @__ubsan_handle_cfi_check_fail(i8* getelementptr inbounds ({{.*}} @[[BADTYPESTATIC]], i32 0, i32 0), i64 [[VTINT]], i64 [[VTVALID]])
154   // DIAG-RECOVER-NEXT: br label %[[CONTBB]]
155 
156   // CFI: [[CONTBB]]
157   // CFI-NVT: [[PTR:%[^ ]*]] = load
158   // CFI-VT: [[PTRI8:%[^ ]*]] = extractvalue { i8*, i1 } [[PAIR]], 0
159   // CFI-VT: [[PTR:%[^ ]*]] = bitcast i8* [[PTRI8]] to
160   // CFI: call void [[PTR]]
161 #line 123
162   a->f();
163 }
164 
165 // ITANIUM: define internal void @_Z3df1PN12_GLOBAL__N_11DE
166 // MS: define internal void @"?df1@@YAXPEAUD@?A0x{{[^@]*}}@@@Z"
167 void df1(D *d) {
168   // TT-ITANIUM: {{%[^ ]*}} = call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata ![[DTYPE:[0-9]+]])
169   // TT-MS: {{%[^ ]*}} = call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"?AUA@@")
170   // TC-ITANIUM: {{%[^ ]*}} = call { i8*, i1 } @llvm.type.checked.load(i8* {{%[^ ]*}}, i32 0, metadata ![[DTYPE:[0-9]+]])
171   // TC-MS: {{%[^ ]*}} = call { i8*, i1 } @llvm.type.checked.load(i8* {{%[^ ]*}}, i32 0, metadata !"?AUA@@")
172   d->f();
173 }
174 
175 // ITANIUM: define internal void @_Z3dg1PN12_GLOBAL__N_11DE
176 // MS: define internal void @"?dg1@@YAXPEAUD@?A0x{{[^@]*}}@@@Z"
177 void dg1(D *d) {
178   // TT-ITANIUM: {{%[^ ]*}} = call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
179   // TT-MS: {{%[^ ]*}} = call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"?AUB@@")
180   // TC-ITANIUM: {{%[^ ]*}} = call { i8*, i1 } @llvm.type.checked.load(i8* {{%[^ ]*}}, i32 8, metadata !"_ZTS1B")
181   // TC-MS: {{%[^ ]*}} = call { i8*, i1 } @llvm.type.checked.load(i8* {{%[^ ]*}}, i32 0, metadata !"?AUB@@")
182   d->g();
183 }
184 
185 // ITANIUM: define internal void @_Z3dh1PN12_GLOBAL__N_11DE
186 // MS: define internal void @"?dh1@@YAXPEAUD@?A0x{{[^@]*}}@@@Z"
187 void dh1(D *d) {
188   // TT-ITANIUM: {{%[^ ]*}} = call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata ![[DTYPE]])
189   // TT-MS: {{%[^ ]*}} = call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata ![[DTYPE:[0-9]+]])
190   // TC-ITANIUM: {{%[^ ]*}} = call { i8*, i1 } @llvm.type.checked.load(i8* {{%[^ ]*}}, i32 16, metadata ![[DTYPE]])
191   // TC-MS: {{%[^ ]*}} = call { i8*, i1 } @llvm.type.checked.load(i8* {{%[^ ]*}}, i32 8, metadata ![[DTYPE:[0-9]+]])
192   d->h();
193 }
194 
195 // ITANIUM: define internal void @_Z3df2PN12_GLOBAL__N_11DE
196 // MS: define internal void @"?df2@@YAXPEAUD@?A0x{{[^@]*}}@@@Z"
197 __attribute__((no_sanitize("cfi")))
198 void df2(D *d) {
199   // CFI-NVT-NOT: call i1 @llvm.type.test
200   // CFI-VT: [[P:%[^ ]*]] = call i1 @llvm.type.test
201   // CFI-VT: call void @llvm.assume(i1 [[P]])
202   d->f();
203 }
204 
205 // ITANIUM: define internal void @_Z3df3PN12_GLOBAL__N_11DE
206 // MS: define internal void @"?df3@@YAXPEAUD@?A0x{{[^@]*}}@@@Z"
207 __attribute__((no_sanitize("address"))) __attribute__((no_sanitize("cfi-vcall")))
208 void df3(D *d) {
209   // CFI-NVT-NOT: call i1 @llvm.type.test
210   // CFI-VT: [[P:%[^ ]*]] = call i1 @llvm.type.test
211   // CFI-VT: call void @llvm.assume(i1 [[P]])
212   d->f();
213 }
214 
215 D d;
216 
217 void foo() {
218   df1(&d);
219   dg1(&d);
220   dh1(&d);
221   df2(&d);
222   df3(&d);
223 
224   struct FA : A {
225     void f() {}
226   } fa;
227   af(&fa);
228 }
229 
230 namespace test2 {
231 
232 struct A {
233   virtual void m_fn1();
234 };
235 struct B {
236   virtual void m_fn2();
237 };
238 struct C : B, A {};
239 struct D : C {
240   void m_fn1();
241 };
242 
243 // ITANIUM: define hidden void @_ZN5test21fEPNS_1DE
244 // ITANIUM-DEFAULTVIS: define void @_ZN5test21fEPNS_1DE
245 // MS: define dso_local void @"?f@test2@@YAXPEAUD@1@@Z"
246 void f(D *d) {
247   // TT-ITANIUM: {{%[^ ]*}} = call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"_ZTSN5test21DE")
248   // TT-MS: {{%[^ ]*}} = call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"?AUA@test2@@")
249   // TC-ITANIUM: {{%[^ ]*}} = call { i8*, i1 } @llvm.type.checked.load(i8* {{%[^ ]*}}, i32 8, metadata !"_ZTSN5test21DE")
250   // TC-MS: {{%[^ ]*}} = call { i8*, i1 } @llvm.type.checked.load(i8* {{%[^ ]*}}, i32 0, metadata !"?AUA@test2@@")
251   d->m_fn1();
252 }
253 
254 }
255 
256 // ITANIUM: [[A16]] = !{i64 16, !"_ZTS1A"}
257 // ITANIUM-DIAG: [[ALL16]] = !{i64 16, !"all-vtables"}
258 // ITANIUM: [[AF16]] = !{i64 16, !"_ZTSM1AFvvE.virtual"}
259 // ITANIUM: [[A32]] = !{i64 32, !"_ZTS1A"}
260 // ITANIUM-DIAG: [[ALL32]] = !{i64 32, !"all-vtables"}
261 // ITANIUM: [[AF32]] = !{i64 32, !"_ZTSM1AFvvE.virtual"}
262 // ITANIUM: [[AF40]] = !{i64 40, !"_ZTSM1AFvvE.virtual"}
263 // ITANIUM: [[AF48]] = !{i64 48, !"_ZTSM1AFvvE.virtual"}
264 // ITANIUM: [[B32]] = !{i64 32, !"_ZTS1B"}
265 // ITANIUM: [[BF32]] = !{i64 32, !"_ZTSM1BFvvE.virtual"}
266 // ITANIUM: [[BF40]] = !{i64 40, !"_ZTSM1BFvvE.virtual"}
267 // ITANIUM: [[BF48]] = !{i64 48, !"_ZTSM1BFvvE.virtual"}
268 // ITANIUM: [[C32]] = !{i64 32, !"_ZTS1C"}
269 // ITANIUM: [[CF32]] = !{i64 32, !"_ZTSM1CFvvE.virtual"}
270 // ITANIUM: [[C88]] = !{i64 88, !"_ZTS1C"}
271 // ITANIUM-DIAG: [[ALL88]] = !{i64 88, !"all-vtables"}
272 // ITANIUM: [[CF40]] = !{i64 40, !"_ZTSM1CFvvE.virtual"}
273 // ITANIUM: [[CF48]] = !{i64 48, !"_ZTSM1CFvvE.virtual"}
274 // ITANIUM: [[D32]] = !{i64 32, [[D_ID:![0-9]+]]}
275 // ITANIUM: [[D_ID]] = distinct !{}
276 // ITANIUM: [[DF32]] = !{i64 32, [[DF_ID:![0-9]+]]}
277 // ITANIUM: [[DF_ID]] = distinct !{}
278 // ITANIUM: [[DF40]] = !{i64 40, [[DF_ID]]}
279 // ITANIUM: [[DF48]] = !{i64 48, [[DF_ID]]}
280 // ITANIUM: [[A64]] = !{i64 64, !"_ZTS1A"}
281 // ITANIUM-DIAG: [[ALL64]] = !{i64 64, !"all-vtables"}
282 // ITANIUM: [[AF64]] = !{i64 64, !"_ZTSM1AFvvE.virtual"}
283 // ITANIUM: [[CF64]] = !{i64 64, !"_ZTSM1CFvvE.virtual"}
284 // ITANIUM: [[FA16]] = !{i64 16, [[FA_ID:![0-9]+]]}
285 // ITANIUM: [[FA_ID]] = distinct !{}
286 // ITANIUM: [[FAF16]] = !{i64 16, [[FAF_ID:![0-9]+]]}
287 // ITANIUM: [[FAF_ID]] = distinct !{}
288 
289 // MS: [[A8]] = !{i64 8, !"?AUA@@"}
290 // MS: [[B8]] = !{i64 8, !"?AUB@@"}
291 // MS: [[D8]] = !{i64 8, [[D_ID:![0-9]+]]}
292 // MS: [[D_ID]] = distinct !{}
293 // MS: [[FA8]] = !{i64 8, [[FA_ID:![0-9]+]]}
294 // MS: [[FA_ID]] = distinct !{}
295