1 // RUN: %clang_cc1 -std=c++11 -fsanitize=signed-integer-overflow,integer-divide-by-zero,float-divide-by-zero,shift-base,shift-exponent,unreachable,return,vla-bound,alignment,null,vptr,object-size,float-cast-overflow,bool,enum,array-bounds,function -fsanitize-recover=signed-integer-overflow,integer-divide-by-zero,float-divide-by-zero,shift-base,shift-exponent,vla-bound,alignment,null,vptr,object-size,float-cast-overflow,bool,enum,array-bounds,function -emit-llvm %s -o - -triple x86_64-linux-gnu | opt -instnamer -S | FileCheck %s 2 // RUN: %clang_cc1 -std=c++11 -fsanitize=vptr,address -fsanitize-recover=vptr,address -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefix=CHECK-ASAN 3 // RUN: %clang_cc1 -std=c++11 -fsanitize=vptr -fsanitize-recover=vptr -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefix=DOWNCAST-NULL 4 // RUN: %clang_cc1 -std=c++11 -fsanitize=function -emit-llvm %s -o - -triple x86_64-linux-gnux32 | FileCheck %s --check-prefix=CHECK-X32 5 // RUN: %clang_cc1 -std=c++11 -fsanitize=function -emit-llvm %s -o - -triple i386-linux-gnu | FileCheck %s --check-prefix=CHECK-X86 6 7 struct S { 8 double d; 9 int a, b; 10 virtual int f(); 11 }; 12 13 // Check that type descriptor global is not modified by ASan. 14 // CHECK-ASAN: [[TYPE_DESCR:@[0-9]+]] = private unnamed_addr constant { i16, i16, [4 x i8] } { i16 -1, i16 0, [4 x i8] c"'S'\00" } 15 16 // Check that type mismatch handler is not modified by ASan. 17 // CHECK-ASAN: private unnamed_addr global { { [{{.*}} x i8]*, i32, i32 }, { i16, i16, [4 x i8] }*, i8*, i8 } { {{.*}}, { i16, i16, [4 x i8] }* [[TYPE_DESCR]], {{.*}} } 18 19 // CHECK: [[IndirectRTTI_ZTIFvPFviEE:@.+]] = private constant i8* bitcast ({ i8*, i8* }* @_ZTIFvPFviEE to i8*) 20 // CHECK-X86: [[IndirectRTTI_ZTIFvPFviEE:@.+]] = private constant i8* bitcast ({ i8*, i8* }* @_ZTIFvPFviEE to i8*) 21 // CHECK-X32: [[IndirectRTTI_ZTIFvPFviEE:@.+]] = private constant i8* bitcast ({ i8*, i8* }* @_ZTIFvPFviEE to i8*) 22 23 struct T : S {}; 24 25 // CHECK-LABEL: @_Z17reference_binding 26 void reference_binding(int *p, S *q) { 27 // C++ core issue 453: If an lvalue to which a reference is directly bound 28 // designates neither an existing object or function of an appropriate type, 29 // nor a region of storage of suitable size and alignment to contain an object 30 // of the reference's type, the behavior is undefined. 31 32 // CHECK: icmp ne {{.*}}, null 33 34 // CHECK: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64 35 // CHECK-NEXT: icmp uge i64 %[[SIZE]], 4 36 37 // CHECK: %[[PTRINT:.*]] = ptrtoint 38 // CHECK-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRINT]], 3 39 // CHECK-NEXT: icmp eq i64 %[[MISALIGN]], 0 40 int &r = *p; 41 42 // A reference is not required to refer to an object within its lifetime. 43 // CHECK-NOT: __ubsan_handle_dynamic_type_cache_miss 44 S &r2 = *q; 45 } 46 47 // CHECK-LABEL: @_Z13member_access 48 // CHECK-ASAN-LABEL: @_Z13member_access 49 void member_access(S *p) { 50 // (1a) Check 'p' is appropriately sized and aligned for member access. 51 52 // CHECK: icmp ne {{.*}}, null 53 54 // CHECK: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64 55 // CHECK-NEXT: icmp uge i64 %[[SIZE]], 24 56 57 // CHECK: %[[PTRINT:.*]] = ptrtoint 58 // CHECK-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRINT]], 7 59 // CHECK-NEXT: icmp eq i64 %[[MISALIGN]], 0 60 61 // (1b) Check that 'p' actually points to an 'S'. 62 63 // CHECK: %[[VPTRADDR:.*]] = bitcast {{.*}} to i64* 64 // CHECK-NEXT: %[[VPTR:.*]] = load i64, i64* %[[VPTRADDR]] 65 // 66 // hash_16_bytes: 67 // 68 // If this number changes, it indicates that either the mangled name of ::S 69 // has changed, or that LLVM's hashing function has changed. The latter case 70 // is OK if the hashing function is still stable. 71 // 72 // The two hash values are for 64- and 32-bit Clang binaries, respectively. 73 // FIXME: We should produce a 64-bit value either way. 74 // 75 // CHECK-NEXT: xor i64 {{-4030275160588942838|1107558922}}, %[[VPTR]] 76 // CHECK-NEXT: mul i64 {{.*}}, -7070675565921424023 77 // CHECK-NEXT: lshr i64 {{.*}}, 47 78 // CHECK-NEXT: xor i64 79 // CHECK-NEXT: xor i64 %[[VPTR]] 80 // CHECK-NEXT: mul i64 {{.*}}, -7070675565921424023 81 // CHECK-NEXT: lshr i64 {{.*}}, 47 82 // CHECK-NEXT: xor i64 83 // CHECK-NEXT: %[[HASH:.*]] = mul i64 {{.*}}, -7070675565921424023 84 // 85 // Check the hash against the table: 86 // 87 // CHECK-NEXT: %[[IDX:.*]] = and i64 %{{.*}}, 127 88 // CHECK-NEXT: getelementptr inbounds [128 x i64], [128 x i64]* @__ubsan_vptr_type_cache, i32 0, i64 %[[IDX]] 89 // CHECK-NEXT: %[[CACHEVAL:.*]] = load i64, i64* 90 // CHECK-NEXT: icmp eq i64 %[[CACHEVAL]], %[[HASH]] 91 // CHECK-NEXT: br i1 92 93 // CHECK: call void @__ubsan_handle_dynamic_type_cache_miss({{.*}}, i64 %{{.*}}, i64 %[[HASH]]) 94 // CHECK-NOT: unreachable 95 // CHECK: {{.*}}: 96 97 // (2) Check 'p->b' is appropriately sized and aligned for a load. 98 99 // FIXME: Suppress this in the trivial case of a member access, because we 100 // know we've just checked the member access expression itself. 101 102 // CHECK: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64 103 // CHECK-NEXT: icmp uge i64 %[[SIZE]], 4 104 105 // CHECK: %[[PTRINT:.*]] = ptrtoint 106 // CHECK-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRINT]], 3 107 // CHECK-NEXT: icmp eq i64 %[[MISALIGN]], 0 108 int k = p->b; 109 110 // (3a) Check 'p' is appropriately sized and aligned for member function call. 111 112 // CHECK: icmp ne {{.*}}, null 113 114 // CHECK: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64 115 // CHECK-NEXT: icmp uge i64 %[[SIZE]], 24 116 117 // CHECK: %[[PTRINT:.*]] = ptrtoint 118 // CHECK-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRINT]], 7 119 // CHECK-NEXT: icmp eq i64 %[[MISALIGN]], 0 120 121 // (3b) Check that 'p' actually points to an 'S' 122 123 // CHECK: load i64, i64* 124 // CHECK-NEXT: xor i64 {{-4030275160588942838|1107558922}}, 125 // [...] 126 // CHECK: getelementptr inbounds [128 x i64], [128 x i64]* @__ubsan_vptr_type_cache, i32 0, i64 % 127 // CHECK: br i1 128 // CHECK: call void @__ubsan_handle_dynamic_type_cache_miss({{.*}}, i64 %{{.*}}, i64 %{{.*}}) 129 // CHECK-NOT: unreachable 130 // CHECK: {{.*}}: 131 132 k = p->f(); 133 } 134 135 // CHECK-LABEL: @_Z12lsh_overflow 136 int lsh_overflow(int a, int b) { 137 // CHECK: %[[RHS_INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31 138 // CHECK-NEXT: br i1 %[[RHS_INBOUNDS]], label %[[CHECK_BB:.*]], label %[[CONT_BB:.*]], 139 140 // CHECK: [[CHECK_BB]]: 141 // CHECK-NEXT: %[[SHIFTED_OUT_WIDTH:.*]] = sub nuw nsw i32 31, %[[RHS]] 142 // CHECK-NEXT: %[[SHIFTED_OUT:.*]] = lshr i32 %[[LHS:.*]], %[[SHIFTED_OUT_WIDTH]] 143 144 // This is present for C++11 but not for C: C++ core issue 1457 allows a '1' 145 // to be shifted into the sign bit, but not out of it. 146 // CHECK-NEXT: %[[SHIFTED_OUT_NOT_SIGN:.*]] = lshr i32 %[[SHIFTED_OUT]], 1 147 148 // CHECK-NEXT: %[[NO_OVERFLOW:.*]] = icmp eq i32 %[[SHIFTED_OUT_NOT_SIGN]], 0 149 // CHECK-NEXT: br label %[[CONT_BB]] 150 151 // CHECK: [[CONT_BB]]: 152 // CHECK-NEXT: %[[VALID_BASE:.*]] = phi i1 [ true, {{.*}} ], [ %[[NO_OVERFLOW]], %[[CHECK_BB]] ] 153 // CHECK-NEXT: %[[VALID:.*]] = and i1 %[[RHS_INBOUNDS]], %[[VALID_BASE]] 154 // CHECK-NEXT: br i1 %[[VALID]] 155 156 // CHECK: call void @__ubsan_handle_shift_out_of_bounds 157 // CHECK-NOT: call void @__ubsan_handle_shift_out_of_bounds 158 159 // CHECK: %[[RET:.*]] = shl i32 %[[LHS]], %[[RHS]] 160 // CHECK-NEXT: ret i32 %[[RET]] 161 return a << b; 162 } 163 164 // CHECK-LABEL: @_Z9no_return 165 int no_return() { 166 // CHECK: call void @__ubsan_handle_missing_return(i8* bitcast ({{.*}}* @{{.*}} to i8*)) [[NR_NUW:#[0-9]+]] 167 // CHECK-NEXT: unreachable 168 } 169 170 // CHECK-LABEL: @_Z9sour_bool 171 bool sour_bool(bool *p) { 172 // CHECK: %[[OK:.*]] = icmp ule i8 {{.*}}, 1 173 // CHECK: br i1 %[[OK]] 174 // CHECK: call void @__ubsan_handle_load_invalid_value(i8* bitcast ({{.*}}), i64 {{.*}}) 175 return *p; 176 } 177 178 enum E1 { e1a = 0, e1b = 127 } e1; 179 enum E2 { e2a = -1, e2b = 64 } e2; 180 enum E3 { e3a = (1u << 31) - 1 } e3; 181 182 // CHECK-LABEL: @_Z14bad_enum_value 183 int bad_enum_value() { 184 // CHECK: %[[E1:.*]] = icmp ule i32 {{.*}}, 127 185 // CHECK: br i1 %[[E1]] 186 // CHECK: call void @__ubsan_handle_load_invalid_value( 187 int a = e1; 188 189 // CHECK: %[[E2HI:.*]] = icmp sle i32 {{.*}}, 127 190 // CHECK: %[[E2LO:.*]] = icmp sge i32 {{.*}}, -128 191 // CHECK: %[[E2:.*]] = and i1 %[[E2HI]], %[[E2LO]] 192 // CHECK: br i1 %[[E2]] 193 // CHECK: call void @__ubsan_handle_load_invalid_value( 194 int b = e2; 195 196 // CHECK: %[[E3:.*]] = icmp ule i32 {{.*}}, 2147483647 197 // CHECK: br i1 %[[E3]] 198 // CHECK: call void @__ubsan_handle_load_invalid_value( 199 int c = e3; 200 return a + b + c; 201 } 202 203 // CHECK-LABEL: @_Z20bad_downcast_pointer 204 // DOWNCAST-NULL-LABEL: @_Z20bad_downcast_pointer 205 void bad_downcast_pointer(S *p) { 206 // CHECK: %[[NONNULL:.*]] = icmp ne {{.*}}, null 207 // CHECK: br i1 %[[NONNULL]], 208 209 // A null pointer access is guarded without -fsanitize=null. 210 // DOWNCAST-NULL: %[[NONNULL:.*]] = icmp ne {{.*}}, null 211 // DOWNCAST-NULL: br i1 %[[NONNULL]], 212 213 // CHECK: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64.p0i8( 214 // CHECK: %[[E1:.*]] = icmp uge i64 %[[SIZE]], 24 215 // CHECK: %[[MISALIGN:.*]] = and i64 %{{.*}}, 7 216 // CHECK: %[[E2:.*]] = icmp eq i64 %[[MISALIGN]], 0 217 // CHECK: %[[E12:.*]] = and i1 %[[E1]], %[[E2]] 218 // CHECK: br i1 %[[E12]], 219 220 // CHECK: call void @__ubsan_handle_type_mismatch 221 // CHECK: br label 222 223 // CHECK: br i1 %{{.*}}, 224 225 // CHECK: call void @__ubsan_handle_dynamic_type_cache_miss 226 // CHECK: br label 227 (void) static_cast<T*>(p); 228 } 229 230 // CHECK-LABEL: @_Z22bad_downcast_reference 231 void bad_downcast_reference(S &p) { 232 // CHECK: %[[E1:.*]] = icmp ne {{.*}}, null 233 // CHECK-NOT: br i1 234 235 // CHECK: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64.p0i8( 236 // CHECK: %[[E2:.*]] = icmp uge i64 %[[SIZE]], 24 237 238 // CHECK: %[[MISALIGN:.*]] = and i64 %{{.*}}, 7 239 // CHECK: %[[E3:.*]] = icmp eq i64 %[[MISALIGN]], 0 240 241 // CHECK: %[[E12:.*]] = and i1 %[[E1]], %[[E2]] 242 // CHECK: %[[E123:.*]] = and i1 %[[E12]], %[[E3]] 243 // CHECK: br i1 %[[E123]], 244 245 // CHECK: call void @__ubsan_handle_type_mismatch 246 // CHECK: br label 247 248 // CHECK: br i1 %{{.*}}, 249 250 // CHECK: call void @__ubsan_handle_dynamic_type_cache_miss 251 // CHECK: br label 252 (void) static_cast<T&>(p); 253 } 254 255 // CHECK-LABEL: @_Z11array_index 256 int array_index(const int (&a)[4], int n) { 257 // CHECK: %[[K1_OK:.*]] = icmp ult i64 %{{.*}}, 4 258 // CHECK: br i1 %[[K1_OK]] 259 // CHECK: call void @__ubsan_handle_out_of_bounds( 260 int k1 = a[n]; 261 262 // CHECK: %[[R1_OK:.*]] = icmp ule i64 %{{.*}}, 4 263 // CHECK: br i1 %[[R1_OK]] 264 // CHECK: call void @__ubsan_handle_out_of_bounds( 265 const int *r1 = &a[n]; 266 267 // CHECK: %[[K2_OK:.*]] = icmp ult i64 %{{.*}}, 8 268 // CHECK: br i1 %[[K2_OK]] 269 // CHECK: call void @__ubsan_handle_out_of_bounds( 270 int k2 = ((const int(&)[8])a)[n]; 271 272 // CHECK: %[[K3_OK:.*]] = icmp ult i64 %{{.*}}, 4 273 // CHECK: br i1 %[[K3_OK]] 274 // CHECK: call void @__ubsan_handle_out_of_bounds( 275 int k3 = n[a]; 276 277 return k1 + *r1 + k2; 278 } 279 280 // CHECK-LABEL: @_Z17multi_array_index 281 int multi_array_index(int n, int m) { 282 int arr[4][6]; 283 284 // CHECK: %[[IDX1_OK:.*]] = icmp ult i64 %{{.*}}, 4 285 // CHECK: br i1 %[[IDX1_OK]] 286 // CHECK: call void @__ubsan_handle_out_of_bounds( 287 288 // CHECK: %[[IDX2_OK:.*]] = icmp ult i64 %{{.*}}, 6 289 // CHECK: br i1 %[[IDX2_OK]] 290 // CHECK: call void @__ubsan_handle_out_of_bounds( 291 return arr[n][m]; 292 } 293 294 // CHECK-LABEL: @_Z11array_arith 295 int array_arith(const int (&a)[4], int n) { 296 // CHECK: %[[K1_OK:.*]] = icmp ule i64 %{{.*}}, 4 297 // CHECK: br i1 %[[K1_OK]] 298 // CHECK: call void @__ubsan_handle_out_of_bounds( 299 const int *k1 = a + n; 300 301 // CHECK: %[[K2_OK:.*]] = icmp ule i64 %{{.*}}, 8 302 // CHECK: br i1 %[[K2_OK]] 303 // CHECK: call void @__ubsan_handle_out_of_bounds( 304 const int *k2 = (const int(&)[8])a + n; 305 306 return *k1 + *k2; 307 } 308 309 struct ArrayMembers { 310 int a1[5]; 311 int a2[1]; 312 }; 313 // CHECK-LABEL: @_Z18struct_array_index 314 int struct_array_index(ArrayMembers *p, int n) { 315 // CHECK: %[[IDX_OK:.*]] = icmp ult i64 %{{.*}}, 5 316 // CHECK: br i1 %[[IDX_OK]] 317 // CHECK: call void @__ubsan_handle_out_of_bounds( 318 return p->a1[n]; 319 } 320 321 // CHECK-LABEL: @_Z16flex_array_index 322 int flex_array_index(ArrayMembers *p, int n) { 323 // CHECK-NOT: call void @__ubsan_handle_out_of_bounds( 324 return p->a2[n]; 325 } 326 327 extern int incomplete[]; 328 // CHECK-LABEL: @_Z22incomplete_array_index 329 int incomplete_array_index(int n) { 330 // CHECK-NOT: call void @__ubsan_handle_out_of_bounds( 331 return incomplete[n]; 332 } 333 334 typedef __attribute__((ext_vector_type(4))) int V4I; 335 // CHECK-LABEL: @_Z12vector_index 336 int vector_index(V4I v, int n) { 337 // CHECK: %[[IDX_OK:.*]] = icmp ult i64 %{{.*}}, 4 338 // CHECK: br i1 %[[IDX_OK]] 339 // CHECK: call void @__ubsan_handle_out_of_bounds( 340 return v[n]; 341 } 342 343 // CHECK-LABEL: @_Z12string_index 344 char string_index(int n) { 345 // CHECK: %[[IDX_OK:.*]] = icmp ult i64 %{{.*}}, 6 346 // CHECK: br i1 %[[IDX_OK]] 347 // CHECK: call void @__ubsan_handle_out_of_bounds( 348 return "Hello"[n]; 349 } 350 351 class A // align=4 352 { 353 int a1, a2, a3; 354 }; 355 356 class B // align=8 357 { 358 long b1, b2; 359 }; 360 361 class C : public A, public B // align=16 362 { 363 alignas(16) int c1; 364 }; 365 366 // Make sure we check the alignment of the pointer after subtracting any 367 // offset. The pointer before subtraction doesn't need to be aligned for 368 // the destination type. 369 370 // CHECK-LABEL: define void @_Z16downcast_pointerP1B(%class.B* %b) 371 void downcast_pointer(B *b) { 372 (void) static_cast<C*>(b); 373 // Alignment check from EmitTypeCheck(TCK_DowncastPointer, ...) 374 // CHECK: [[SUB:%[.a-z0-9]*]] = getelementptr inbounds i8, i8* {{.*}}, i64 -16 375 // CHECK-NEXT: [[C:%.+]] = bitcast i8* [[SUB]] to %class.C* 376 // null check goes here 377 // CHECK: [[FROM_PHI:%.+]] = phi %class.C* [ [[C]], {{.*}} ], {{.*}} 378 // Objectsize check goes here 379 // CHECK: [[C_INT:%.+]] = ptrtoint %class.C* [[FROM_PHI]] to i64 380 // CHECK-NEXT: [[MASKED:%.+]] = and i64 [[C_INT]], 15 381 // CHECK-NEXT: [[TEST:%.+]] = icmp eq i64 [[MASKED]], 0 382 // AND the alignment test with the objectsize test. 383 // CHECK-NEXT: [[AND:%.+]] = and i1 {{.*}}, [[TEST]] 384 // CHECK-NEXT: br i1 [[AND]] 385 } 386 387 // CHECK-LABEL: define void @_Z18downcast_referenceR1B(%class.B* nonnull align {{[0-9]+}} dereferenceable({{[0-9]+}}) %b) 388 void downcast_reference(B &b) { 389 (void) static_cast<C&>(b); 390 // Alignment check from EmitTypeCheck(TCK_DowncastReference, ...) 391 // CHECK: [[SUB:%[.a-z0-9]*]] = getelementptr inbounds i8, i8* {{.*}}, i64 -16 392 // CHECK-NEXT: [[C:%.+]] = bitcast i8* [[SUB]] to %class.C* 393 // Objectsize check goes here 394 // CHECK: [[C_INT:%.+]] = ptrtoint %class.C* [[C]] to i64 395 // CHECK-NEXT: [[MASKED:%.+]] = and i64 [[C_INT]], 15 396 // CHECK-NEXT: [[TEST:%.+]] = icmp eq i64 [[MASKED]], 0 397 // AND the alignment test with the objectsize test. 398 // CHECK: [[AND:%.+]] = and i1 {{.*}}, [[TEST]] 399 // CHECK-NEXT: br i1 [[AND]] 400 } 401 402 // 403 // CHECK-LABEL: @_Z22indirect_function_callPFviE({{.*}} prologue <{ i32, i32 }> <{ i32 846595819, i32 trunc (i64 sub (i64 ptrtoint (i8** {{.*}} to i64), i64 ptrtoint (void (void (i32)*)* @_Z22indirect_function_callPFviE to i64)) to i32) }> 404 // CHECK-X32: @_Z22indirect_function_callPFviE({{.*}} prologue <{ i32, i32 }> <{ i32 846595819, i32 sub (i32 ptrtoint (i8** [[IndirectRTTI_ZTIFvPFviEE]] to i32), i32 ptrtoint (void (void (i32)*)* @_Z22indirect_function_callPFviE to i32)) }> 405 // CHECK-X86: @_Z22indirect_function_callPFviE({{.*}} prologue <{ i32, i32 }> <{ i32 846595819, i32 sub (i32 ptrtoint (i8** [[IndirectRTTI_ZTIFvPFviEE]] to i32), i32 ptrtoint (void (void (i32)*)* @_Z22indirect_function_callPFviE to i32)) }> 406 void indirect_function_call(void (*p)(int)) { 407 // CHECK: [[PTR:%.+]] = bitcast void (i32)* {{.*}} to <{ i32, i32 }>* 408 409 // Signature check 410 // CHECK-NEXT: [[SIGPTR:%.+]] = getelementptr <{ i32, i32 }>, <{ i32, i32 }>* [[PTR]], i32 0, i32 0 411 // CHECK-NEXT: [[SIG:%.+]] = load i32, i32* [[SIGPTR]] 412 // CHECK-NEXT: [[SIGCMP:%.+]] = icmp eq i32 [[SIG]], 846595819 413 // CHECK-NEXT: br i1 [[SIGCMP]] 414 415 // RTTI pointer check 416 // CHECK: [[RTTIPTR:%.+]] = getelementptr <{ i32, i32 }>, <{ i32, i32 }>* [[PTR]], i32 0, i32 1 417 // CHECK-NEXT: [[RTTIEncIntTrunc:%.+]] = load i32, i32* [[RTTIPTR]] 418 // CHECK-NEXT: [[RTTIEncInt:%.+]] = sext i32 [[RTTIEncIntTrunc]] to i64 419 // CHECK-NEXT: [[FuncAddrInt:%.+]] = ptrtoint void (i32)* {{.*}} to i64 420 // CHECK-NEXT: [[IndirectGVInt:%.+]] = add i64 [[RTTIEncInt]], [[FuncAddrInt]] 421 // CHECK-NEXT: [[IndirectGV:%.+]] = inttoptr i64 [[IndirectGVInt]] to i8** 422 // CHECK-NEXT: [[RTTI:%.+]] = load i8*, i8** [[IndirectGV]], align 8 423 // CHECK-NEXT: [[RTTICMP:%.+]] = icmp eq i8* [[RTTI]], bitcast ({ i8*, i8* }* @_ZTIFviE to i8*) 424 // CHECK-NEXT: br i1 [[RTTICMP]] 425 426 p(42); 427 } 428 429 namespace VBaseObjectSize { 430 // Note: C is laid out such that offsetof(C, B) + sizeof(B) extends outside 431 // the C object. 432 struct alignas(16) A { void *a1, *a2; }; 433 struct B : virtual A { void *b; }; 434 struct C : virtual A, virtual B {}; 435 // CHECK-LABEL: define {{.*}} @_ZN15VBaseObjectSize1fERNS_1BE( 436 B &f(B &b) { 437 // Size check: check for nvsize(B) == 16 (do not require size(B) == 32) 438 // CHECK: [[SIZE:%.+]] = call i{{32|64}} @llvm.objectsize.i64.p0i8( 439 // CHECK: icmp uge i{{32|64}} [[SIZE]], 16, 440 441 // Alignment check: check for nvalign(B) == 8 (do not require align(B) == 16) 442 // CHECK: [[PTRTOINT:%.+]] = ptrtoint {{.*}} to i64, 443 // CHECK: and i64 [[PTRTOINT]], 7, 444 return b; 445 } 446 } 447 448 namespace FunctionSanitizerVirtualCalls { 449 struct A { 450 virtual void f() {} 451 virtual void g() {} 452 void h() {} 453 }; 454 455 struct B : virtual A { 456 virtual void b() {} 457 virtual void f(); 458 void g() final {} 459 static void q() {} 460 }; 461 462 void B::f() {} 463 464 void force_irgen() { 465 A a; 466 a.g(); 467 a.h(); 468 469 B b; 470 b.f(); 471 b.b(); 472 b.g(); 473 B::q(); 474 } 475 476 // CHECK-LABEL: define void @_ZN29FunctionSanitizerVirtualCalls1B1fEv 477 // CHECK-NOT: prologue 478 // 479 // CHECK-LABEL: define void @_ZTv0_n24_N29FunctionSanitizerVirtualCalls1B1fEv 480 // CHECK-NOT: prologue 481 // 482 // CHECK-LABEL: define void @_ZN29FunctionSanitizerVirtualCalls11force_irgenEv() 483 // CHECK: prologue 484 // 485 // CHECK-LABEL: define linkonce_odr void @_ZN29FunctionSanitizerVirtualCalls1AC1Ev 486 // CHECK-NOT: prologue 487 // 488 // CHECK-LABEL: define linkonce_odr void @_ZN29FunctionSanitizerVirtualCalls1A1gEv 489 // CHECK-NOT: prologue 490 // 491 // CHECK-LABEL: define linkonce_odr void @_ZN29FunctionSanitizerVirtualCalls1A1hEv 492 // CHECK-NOT: prologue 493 // 494 // CHECK-LABEL: define linkonce_odr void @_ZN29FunctionSanitizerVirtualCalls1BC1Ev 495 // CHECK-NOT: prologue 496 // 497 // CHECK-LABEL: define linkonce_odr void @_ZN29FunctionSanitizerVirtualCalls1B1bEv 498 // CHECK-NOT: prologue 499 // 500 // CHECK-LABEL: define linkonce_odr void @_ZN29FunctionSanitizerVirtualCalls1B1gEv 501 // CHECK-NOT: prologue 502 // 503 // CHECK-LABEL: define linkonce_odr void @_ZN29FunctionSanitizerVirtualCalls1B1qEv 504 // CHECK: prologue 505 506 } 507 508 namespace UpcastPointerTest { 509 struct S {}; 510 struct T : S { double d; }; 511 struct V : virtual S {}; 512 513 // CHECK-LABEL: upcast_pointer 514 S* upcast_pointer(T* t) { 515 // Check for null pointer 516 // CHECK: %[[NONNULL:.*]] = icmp ne {{.*}}, null 517 // CHECK: br i1 %[[NONNULL]] 518 519 // Check alignment 520 // CHECK: %[[MISALIGN:.*]] = and i64 %{{.*}}, 7 521 // CHECK: icmp eq i64 %[[MISALIGN]], 0 522 523 // CHECK: call void @__ubsan_handle_type_mismatch 524 return t; 525 } 526 527 V getV(); 528 529 // CHECK-LABEL: upcast_to_vbase 530 void upcast_to_vbase() { 531 // No need to check for null here, as we have a temporary here. 532 533 // CHECK-NOT: br i1 534 535 // CHECK: call i64 @llvm.objectsize 536 // CHECK: call void @__ubsan_handle_type_mismatch 537 // CHECK: call void @__ubsan_handle_dynamic_type_cache_miss 538 const S& s = getV(); 539 } 540 } 541 542 struct nothrow {}; 543 void *operator new[](__SIZE_TYPE__, nothrow) noexcept; 544 545 namespace NothrowNew { 546 struct X { X(); }; 547 548 // CHECK-LABEL: define{{.*}}nothrow_new_trivial 549 void *nothrow_new_trivial() { 550 // CHECK: %[[is_null:.*]] = icmp eq i8*{{.*}}, null 551 // CHECK: br i1 %[[is_null]], label %[[null:.*]], label %[[nonnull:.*]] 552 553 // CHECK: [[nonnull]]: 554 // CHECK: llvm.objectsize 555 // CHECK: icmp uge i64 {{.*}}, 123456, 556 // CHECK: br i1 557 // 558 // CHECK: call {{.*}}__ubsan_handle_type_mismatch 559 // 560 // CHECK: [[null]]: 561 // CHECK-NOT: {{ }}br{{ }} 562 // CHECK: ret 563 return new (nothrow{}) char[123456]; 564 } 565 566 // CHECK-LABEL: define{{.*}}nothrow_new_nontrivial 567 void *nothrow_new_nontrivial() { 568 // CHECK: %[[is_null:.*]] = icmp eq i8*{{.*}}, null 569 // CHECK: br i1 %[[is_null]], label %[[null:.*]], label %[[nonnull:.*]] 570 571 // CHECK: [[nonnull]]: 572 // CHECK: llvm.objectsize 573 // CHECK: icmp uge i64 {{.*}}, 123456, 574 // CHECK: br i1 575 // 576 // CHECK: call {{.*}}__ubsan_handle_type_mismatch 577 // 578 // CHECK: call {{.*}}_ZN10NothrowNew1XC1Ev 579 // 580 // CHECK: [[null]]: 581 // CHECK-NOT: {{ }}br{{ }} 582 // CHECK: ret 583 return new (nothrow{}) X[123456]; 584 } 585 586 // CHECK-LABEL: define{{.*}}throwing_new 587 void *throwing_new(int size) { 588 // CHECK: icmp ne i8*{{.*}}, null 589 // CHECK: %[[size:.*]] = mul 590 // CHECK: llvm.objectsize 591 // CHECK: icmp uge i64 {{.*}}, %[[size]], 592 // CHECK: %[[ok:.*]] = and 593 // CHECK: br i1 %[[ok]], label %[[good:.*]], label %[[bad:[^,]*]] 594 // 595 // CHECK: [[bad]]: 596 // CHECK: call {{.*}}__ubsan_handle_type_mismatch 597 // 598 // CHECK: [[good]]: 599 // CHECK-NOT: {{ }}br{{ }} 600 // CHECK: ret 601 return new char[size]; 602 } 603 604 // CHECK-LABEL: define{{.*}}nothrow_new_zero_size 605 void *nothrow_new_zero_size() { 606 // CHECK: %[[nonnull:.*]] = icmp ne i8*{{.*}}, null 607 // CHECK-NOT: llvm.objectsize 608 // CHECK: br i1 %[[nonnull]], label %[[good:.*]], label %[[bad:[^,]*]] 609 // 610 // CHECK: [[bad]]: 611 // CHECK: call {{.*}}__ubsan_handle_type_mismatch 612 // 613 // CHECK: [[good]]: 614 // CHECK-NOT: {{ }}br{{ }} 615 // CHECK: ret 616 return new char[0]; 617 } 618 619 // CHECK-LABEL: define{{.*}}throwing_new_zero_size 620 void *throwing_new_zero_size() { 621 // Nothing to check here. 622 // CHECK-NOT: __ubsan_handle_type_mismatch 623 return new (nothrow{}) char[0]; 624 // CHECK: ret 625 } 626 } 627 628 struct ThisAlign { 629 void this_align_lambda(); 630 void this_align_lambda_2(); 631 }; 632 void ThisAlign::this_align_lambda() { 633 // CHECK-LABEL: define internal %struct.ThisAlign* @"_ZZN9ThisAlign17this_align_lambdaEvENK3$_0clEv" 634 // CHECK-SAME: (%{{.*}}* %[[this:[^)]*]]) 635 // CHECK: %[[this_addr:.*]] = alloca 636 // CHECK: store %{{.*}}* %[[this]], %{{.*}}** %[[this_addr]], 637 // CHECK: %[[this_inner:.*]] = load %{{.*}}*, %{{.*}}** %[[this_addr]], 638 // CHECK: %[[this_outer_addr:.*]] = getelementptr inbounds %{{.*}}, %{{.*}}* %[[this_inner]], i32 0, i32 0 639 // CHECK: %[[this_outer:.*]] = load %{{.*}}*, %{{.*}}** %[[this_outer_addr]], 640 // 641 // CHECK: %[[this_inner_isnonnull:.*]] = icmp ne %{{.*}}* %[[this_inner]], null 642 // CHECK: %[[this_inner_asint:.*]] = ptrtoint %{{.*}}* %[[this_inner]] to i 643 // CHECK: %[[this_inner_misalignment:.*]] = and i{{32|64}} %[[this_inner_asint]], {{3|7}}, 644 // CHECK: %[[this_inner_isaligned:.*]] = icmp eq i{{32|64}} %[[this_inner_misalignment]], 0 645 // CHECK: %[[this_inner_valid:.*]] = and i1 %[[this_inner_isnonnull]], %[[this_inner_isaligned]], 646 // CHECK: br i1 %[[this_inner_valid:.*]] 647 [&] { return this; } (); 648 } 649 650 namespace CopyValueRepresentation { 651 // CHECK-LABEL: define {{.*}} @_ZN23CopyValueRepresentation2S3aSERKS0_ 652 // CHECK-NOT: call {{.*}} @__ubsan_handle_load_invalid_value 653 // CHECK-LABEL: define {{.*}} @_ZN23CopyValueRepresentation2S4aSEOS0_ 654 // CHECK-NOT: call {{.*}} @__ubsan_handle_load_invalid_value 655 // CHECK-LABEL: define {{.*}} @_ZN23CopyValueRepresentation2S1C2ERKS0_ 656 // CHECK-NOT: call {{.*}} __ubsan_handle_load_invalid_value 657 // CHECK-LABEL: define {{.*}} @_ZN23CopyValueRepresentation2S2C2ERKS0_ 658 // CHECK: __ubsan_handle_load_invalid_value 659 // CHECK-LABEL: define {{.*}} @_ZN23CopyValueRepresentation2S5C2ERKS0_ 660 // CHECK-NOT: call {{.*}} __ubsan_handle_load_invalid_value 661 662 struct CustomCopy { CustomCopy(); CustomCopy(const CustomCopy&); }; 663 struct S1 { 664 CustomCopy CC; 665 bool b; 666 }; 667 void callee1(S1); 668 void test1() { 669 S1 s11; 670 callee1(s11); 671 S1 s12; 672 s12 = s11; 673 } 674 675 static bool some_global_bool; 676 struct ExprCopy { 677 ExprCopy(); 678 ExprCopy(const ExprCopy&, bool b = some_global_bool); 679 }; 680 struct S2 { 681 ExprCopy EC; 682 bool b; 683 }; 684 void callee2(S2); 685 void test2(void) { 686 S2 s21; 687 callee2(s21); 688 S2 s22; 689 s22 = s21; 690 } 691 692 struct CustomAssign { CustomAssign &operator=(const CustomAssign&); }; 693 struct S3 { 694 CustomAssign CA; 695 bool b; 696 }; 697 void test3() { 698 S3 x, y; 699 x = y; 700 } 701 702 struct CustomMove { 703 CustomMove(); 704 CustomMove(const CustomMove&&); 705 CustomMove &operator=(const CustomMove&&); 706 }; 707 struct S4 { 708 CustomMove CM; 709 bool b; 710 }; 711 void test4() { 712 S4 x, y; 713 x = static_cast<S4&&>(y); 714 } 715 716 struct EnumCustomCopy { 717 EnumCustomCopy(); 718 EnumCustomCopy(const EnumCustomCopy&); 719 }; 720 struct S5 { 721 EnumCustomCopy ECC; 722 bool b; 723 }; 724 void callee5(S5); 725 void test5() { 726 S5 s51; 727 callee5(s51); 728 S5 s52; 729 s52 = s51; 730 } 731 } 732 733 void ThisAlign::this_align_lambda_2() { 734 // CHECK-LABEL: define internal void @"_ZZN9ThisAlign19this_align_lambda_2EvENK3$_1clEv" 735 // CHECK-SAME: (%{{.*}}* %[[this:[^)]*]]) 736 // CHECK: %[[this_addr:.*]] = alloca 737 // CHECK: store %{{.*}}* %[[this]], %{{.*}}** %[[this_addr]], 738 // CHECK: %[[this_inner:.*]] = load %{{.*}}*, %{{.*}}** %[[this_addr]], 739 // 740 // Do not perform a null check on the 'this' pointer if the function might be 741 // called from a static invoker. 742 // CHECK-NOT: icmp ne %{{.*}}* %[[this_inner]], null 743 auto *p = +[] {}; 744 p(); 745 } 746 747 // CHECK: attributes [[NR_NUW]] = { noreturn nounwind } 748