1 // RUN: %clang_cc1 -fsanitize=alignment,null,object-size,shift-base,shift-exponent,return,signed-integer-overflow,vla-bound,float-cast-overflow,integer-divide-by-zero,bool,returns-nonnull-attribute,nonnull-attribute -fsanitize-recover=alignment,null,object-size,shift-base,shift-exponent,signed-integer-overflow,vla-bound,float-cast-overflow,integer-divide-by-zero,bool,returns-nonnull-attribute,nonnull-attribute -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefix=CHECK-COMMON --check-prefix=CHECK-UBSAN 2 // RUN: %clang_cc1 -fsanitize-trap=alignment,null,object-size,shift-base,shift-exponent,return,signed-integer-overflow,vla-bound,float-cast-overflow,integer-divide-by-zero,bool,returns-nonnull-attribute,nonnull-attribute -fsanitize-recover=alignment,null,object-size,shift-base,shift-exponent,signed-integer-overflow,vla-bound,float-cast-overflow,integer-divide-by-zero,bool,returns-nonnull-attribute,nonnull-attribute -fsanitize=alignment,null,object-size,shift-base,shift-exponent,return,signed-integer-overflow,vla-bound,float-cast-overflow,integer-divide-by-zero,bool,returns-nonnull-attribute,nonnull-attribute -fsanitize-recover=alignment,null,object-size,shift-base,shift-exponent,signed-integer-overflow,vla-bound,float-cast-overflow,integer-divide-by-zero,bool,returns-nonnull-attribute,nonnull-attribute -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefix=CHECK-COMMON --check-prefix=CHECK-TRAP 3 // RUN: %clang_cc1 -fsanitize=null -fsanitize-recover=null -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefix=CHECK-NULL 4 // RUN: %clang_cc1 -fsanitize=signed-integer-overflow -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefix=CHECK-OVERFLOW 5 // REQUIRES: asserts 6 7 // CHECK-UBSAN: @[[INT:.*]] = private unnamed_addr constant { i16, i16, [6 x i8] } { i16 0, i16 11, [6 x i8] c"'int'\00" } 8 9 // FIXME: When we only emit each type once, use [[INT]] more below. 10 // CHECK-UBSAN: @[[LINE_100:.*]] = private unnamed_addr global {{.*}}, i32 100, i32 5 {{.*}} @[[INT]], i64 4, i8 1 11 // CHECK-UBSAN: @[[LINE_200:.*]] = {{.*}}, i32 200, i32 10 {{.*}}, i64 4, i8 0 12 // CHECK-UBSAN: @[[LINE_300:.*]] = {{.*}}, i32 300, i32 12 {{.*}} @{{.*}}, {{.*}} @{{.*}} 13 // CHECK-UBSAN: @[[LINE_400:.*]] = {{.*}}, i32 400, i32 12 {{.*}} @{{.*}}, {{.*}} @{{.*}} 14 // CHECK-UBSAN: @[[LINE_500:.*]] = {{.*}}, i32 500, i32 10 {{.*}} @{{.*}}, i64 4, i8 0 } 15 // CHECK-UBSAN: @[[LINE_600:.*]] = {{.*}}, i32 600, i32 3 {{.*}} @{{.*}}, i64 4, i8 1 } 16 17 // CHECK-UBSAN: @[[STRUCT_S:.*]] = private unnamed_addr constant { i16, i16, [11 x i8] } { i16 -1, i16 0, [11 x i8] c"'struct S'\00" } 18 19 // CHECK-UBSAN: @[[LINE_700:.*]] = {{.*}}, i32 700, i32 14 {{.*}} @[[STRUCT_S]], i64 4, i8 3 } 20 // CHECK-UBSAN: @[[LINE_800:.*]] = {{.*}}, i32 800, i32 12 {{.*}} @{{.*}} } 21 // CHECK-UBSAN: @[[LINE_900:.*]] = {{.*}}, i32 900, i32 11 {{.*}} @{{.*}} } 22 23 // CHECK-NULL: @[[LINE_100:.*]] = private unnamed_addr global {{.*}}, i32 100, i32 5 {{.*}} 24 25 // PR6805 26 // CHECK-COMMON-LABEL: @foo 27 // CHECK-NULL-LABEL: @foo 28 void foo() { 29 union { int i; } u; 30 // CHECK-COMMON: %[[CHECK0:.*]] = icmp ne {{.*}}* %[[PTR:.*]], null 31 32 // CHECK-COMMON: %[[I8PTR:.*]] = bitcast i32* %[[PTR]] to i8* 33 // CHECK-COMMON-NEXT: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64.p0i8(i8* %[[I8PTR]], i1 false) 34 // CHECK-COMMON-NEXT: %[[CHECK1:.*]] = icmp uge i64 %[[SIZE]], 4 35 36 // CHECK-COMMON: %[[PTRTOINT:.*]] = ptrtoint {{.*}}* %[[PTR]] to i64 37 // CHECK-COMMON-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRTOINT]], 3 38 // CHECK-COMMON-NEXT: %[[CHECK2:.*]] = icmp eq i64 %[[MISALIGN]], 0 39 40 // CHECK-COMMON: %[[CHECK01:.*]] = and i1 %[[CHECK0]], %[[CHECK1]] 41 // CHECK-COMMON-NEXT: %[[OK:.*]] = and i1 %[[CHECK01]], %[[CHECK2]] 42 43 // CHECK-UBSAN: br i1 %[[OK]], {{.*}} !prof ![[WEIGHT_MD:.*]], !nosanitize 44 // CHECK-TRAP: br i1 %[[OK]], {{.*}} 45 46 // CHECK-UBSAN: %[[ARG:.*]] = ptrtoint {{.*}} %[[PTR]] to i64 47 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_100]] to i8*), i64 %[[ARG]]) 48 49 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW:#[0-9]+]] 50 // CHECK-TRAP-NEXT: unreachable 51 52 // With -fsanitize=null, only perform the null check. 53 // CHECK-NULL: %[[NULL:.*]] = icmp ne {{.*}}, null 54 // CHECK-NULL: br i1 %[[NULL]] 55 // CHECK-NULL: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_100]] to i8*), i64 %{{.*}}) 56 #line 100 57 u.i=1; 58 } 59 60 // CHECK-COMMON-LABEL: @bar 61 int bar(int *a) { 62 // CHECK-COMMON: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64 63 // CHECK-COMMON-NEXT: icmp uge i64 %[[SIZE]], 4 64 65 // CHECK-COMMON: %[[PTRINT:.*]] = ptrtoint 66 // CHECK-COMMON-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRINT]], 3 67 // CHECK-COMMON-NEXT: icmp eq i64 %[[MISALIGN]], 0 68 69 // CHECK-UBSAN: %[[ARG:.*]] = ptrtoint 70 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_200]] to i8*), i64 %[[ARG]]) 71 72 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 73 // CHECK-TRAP-NEXT: unreachable 74 75 #line 200 76 return *a; 77 } 78 79 // CHECK-UBSAN-LABEL: @addr_space 80 int addr_space(int __attribute__((address_space(256))) *a) { 81 // CHECK-UBSAN-NOT: __ubsan 82 return *a; 83 } 84 85 // CHECK-COMMON-LABEL: @lsh_overflow 86 int lsh_overflow(int a, int b) { 87 // CHECK-COMMON: %[[RHS_INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31 88 // CHECK-COMMON-NEXT: br i1 %[[RHS_INBOUNDS]], label %[[CHECK_BB:.*]], label %[[CONT_BB:.*]], 89 90 // CHECK-COMMON: [[CHECK_BB]]: 91 // CHECK-COMMON-NEXT: %[[SHIFTED_OUT_WIDTH:.*]] = sub nuw nsw i32 31, %[[RHS]] 92 // CHECK-COMMON-NEXT: %[[SHIFTED_OUT:.*]] = lshr i32 %[[LHS:.*]], %[[SHIFTED_OUT_WIDTH]] 93 // CHECK-COMMON-NEXT: %[[NO_OVERFLOW:.*]] = icmp eq i32 %[[SHIFTED_OUT]], 0 94 // CHECK-COMMON-NEXT: br label %[[CONT_BB]] 95 96 // CHECK-COMMON: [[CONT_BB]]: 97 // CHECK-COMMON-NEXT: %[[VALID_BASE:.*]] = phi i1 [ true, {{.*}} ], [ %[[NO_OVERFLOW]], %[[CHECK_BB]] ] 98 // CHECK-COMMON-NEXT: %[[VALID:.*]] = and i1 %[[RHS_INBOUNDS]], %[[VALID_BASE]] 99 100 // CHECK-UBSAN: br i1 %[[VALID]], {{.*}} !prof ![[WEIGHT_MD]] 101 // CHECK-TRAP: br i1 %[[VALID]] 102 103 // CHECK-UBSAN: %[[ARG1:.*]] = zext 104 // CHECK-UBSAN-NEXT: %[[ARG2:.*]] = zext 105 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_shift_out_of_bounds(i8* bitcast ({{.*}} @[[LINE_300]] to i8*), i64 %[[ARG1]], i64 %[[ARG2]]) 106 // CHECK-UBSAN-NOT: call void @__ubsan_handle_shift_out_of_bounds 107 108 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 109 // CHECK-TRAP: unreachable 110 // CHECK-TRAP-NOT: call void @llvm.trap() 111 112 // CHECK-COMMON: %[[RET:.*]] = shl i32 %[[LHS]], %[[RHS]] 113 // CHECK-COMMON-NEXT: ret i32 %[[RET]] 114 #line 300 115 return a << b; 116 } 117 118 // CHECK-COMMON-LABEL: @rsh_inbounds 119 int rsh_inbounds(int a, int b) { 120 // CHECK-COMMON: %[[INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31 121 // CHECK-COMMON: br i1 %[[INBOUNDS]] 122 123 // CHECK-UBSAN: %[[ARG1:.*]] = zext 124 // CHECK-UBSAN-NEXT: %[[ARG2:.*]] = zext 125 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_shift_out_of_bounds(i8* bitcast ({{.*}} @[[LINE_400]] to i8*), i64 %[[ARG1]], i64 %[[ARG2]]) 126 127 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 128 // CHECK-TRAP-NEXT: unreachable 129 130 // CHECK-COMMON: %[[RET:.*]] = ashr i32 {{.*}}, %[[RHS]] 131 // CHECK-COMMON-NEXT: ret i32 %[[RET]] 132 #line 400 133 return a >> b; 134 } 135 136 // CHECK-COMMON-LABEL: @load 137 int load(int *p) { 138 // CHECK-UBSAN: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_500]] to i8*), i64 %{{.*}}) 139 140 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 141 // CHECK-TRAP-NEXT: unreachable 142 #line 500 143 return *p; 144 } 145 146 // CHECK-COMMON-LABEL: @store 147 void store(int *p, int q) { 148 // CHECK-UBSAN: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_600]] to i8*), i64 %{{.*}}) 149 150 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 151 // CHECK-TRAP-NEXT: unreachable 152 #line 600 153 *p = q; 154 } 155 156 struct S { int k; }; 157 158 // CHECK-COMMON-LABEL: @member_access 159 int *member_access(struct S *p) { 160 // CHECK-UBSAN: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_700]] to i8*), i64 %{{.*}}) 161 162 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 163 // CHECK-TRAP-NEXT: unreachable 164 #line 700 165 return &p->k; 166 } 167 168 // CHECK-COMMON-LABEL: @signed_overflow 169 int signed_overflow(int a, int b) { 170 // CHECK-UBSAN: %[[ARG1:.*]] = zext 171 // CHECK-UBSAN-NEXT: %[[ARG2:.*]] = zext 172 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_add_overflow(i8* bitcast ({{.*}} @[[LINE_800]] to i8*), i64 %[[ARG1]], i64 %[[ARG2]]) 173 174 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 175 // CHECK-TRAP-NEXT: unreachable 176 #line 800 177 return a + b; 178 } 179 180 // CHECK-COMMON-LABEL: @no_return 181 int no_return() { 182 // Reaching the end of a noreturn function is fine in C. 183 // FIXME: If the user explicitly requests -fsanitize=return, we should catch 184 // that here even though it's not undefined behavior. 185 // CHECK-COMMON-NOT: call 186 // CHECK-COMMON-NOT: unreachable 187 // CHECK-COMMON: ret i32 188 } 189 190 // CHECK-UBSAN-LABEL: @vla_bound 191 void vla_bound(int n) { 192 // CHECK-UBSAN: icmp sgt i32 %[[PARAM:.*]], 0 193 // 194 // CHECK-UBSAN: %[[ARG:.*]] = zext i32 %[[PARAM]] to i64 195 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_vla_bound_not_positive(i8* bitcast ({{.*}} @[[LINE_900]] to i8*), i64 %[[ARG]]) 196 #line 900 197 int arr[n * 3]; 198 } 199 200 // CHECK-UBSAN-LABEL: @int_float_no_overflow 201 float int_float_no_overflow(__int128 n) { 202 // CHECK-UBSAN-NOT: call void @__ubsan_handle 203 return n; 204 } 205 206 // CHECK-COMMON-LABEL: @int_float_overflow 207 float int_float_overflow(unsigned __int128 n) { 208 // This is 2**104. FLT_MAX is 2**128 - 2**104. 209 // CHECK-COMMON: %[[INBOUNDS:.*]] = icmp ule i128 %{{.*}}, -20282409603651670423947251286016 210 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 211 212 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow( 213 214 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 215 // CHECK-TRAP-NEXT: unreachable 216 return n; 217 } 218 219 // CHECK-COMMON-LABEL: @int_fp16_overflow 220 void int_fp16_overflow(int n, __fp16 *p) { 221 // CHECK-COMMON: %[[GE:.*]] = icmp sge i32 %{{.*}}, -65504 222 // CHECK-COMMON: %[[LE:.*]] = icmp sle i32 %{{.*}}, 65504 223 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 224 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 225 226 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow( 227 228 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 229 // CHECK-TRAP-NEXT: unreachable 230 *p = n; 231 } 232 233 // CHECK-COMMON-LABEL: @float_int_overflow 234 int float_int_overflow(float f) { 235 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt float %[[F:.*]], 0xC1E0000020000000 236 // CHECK-COMMON: %[[LE:.*]] = fcmp olt float %[[F]], 0x41E0000000000000 237 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 238 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 239 240 // CHECK-UBSAN: %[[CAST:.*]] = bitcast float %[[F]] to i32 241 // CHECK-UBSAN: %[[ARG:.*]] = zext i32 %[[CAST]] to i64 242 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow({{.*}}, i64 %[[ARG]] 243 244 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 245 // CHECK-TRAP-NEXT: unreachable 246 return f; 247 } 248 249 // CHECK-COMMON-LABEL: @long_double_int_overflow 250 int long_double_int_overflow(long double ld) { 251 // CHECK-UBSAN: alloca x86_fp80 252 253 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt x86_fp80 %[[F:.*]], 0xKC01E800000010000000 254 // CHECK-COMMON: %[[LE:.*]] = fcmp olt x86_fp80 %[[F]], 0xK401E800000000000000 255 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 256 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 257 258 // CHECK-UBSAN: store x86_fp80 %[[F]], x86_fp80* %[[ALLOCA:.*]], !nosanitize 259 // CHECK-UBSAN: %[[ARG:.*]] = ptrtoint x86_fp80* %[[ALLOCA]] to i64 260 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow({{.*}}, i64 %[[ARG]] 261 262 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 263 // CHECK-TRAP-NEXT: unreachable 264 return ld; 265 } 266 267 // CHECK-COMMON-LABEL: @float_uint_overflow 268 unsigned float_uint_overflow(float f) { 269 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt float %[[F:.*]], -1.{{0*}}e+00 270 // CHECK-COMMON: %[[LE:.*]] = fcmp olt float %[[F]], 0x41F0000000000000 271 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 272 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 273 274 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow( 275 276 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 277 // CHECK-TRAP-NEXT: unreachable 278 return f; 279 } 280 281 // CHECK-COMMON-LABEL: @fp16_char_overflow 282 signed char fp16_char_overflow(__fp16 *p) { 283 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt float %[[F:.*]], -1.29{{0*}}e+02 284 // CHECK-COMMON: %[[LE:.*]] = fcmp olt float %[[F]], 1.28{{0*}}e+02 285 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 286 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 287 288 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow( 289 290 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 291 // CHECK-TRAP-NEXT: unreachable 292 return *p; 293 } 294 295 // CHECK-COMMON-LABEL: @float_float_overflow 296 float float_float_overflow(double f) { 297 // CHECK-COMMON: %[[F:.*]] = call double @llvm.fabs.f64( 298 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt double %[[F]], 0x47EFFFFFE0000000 299 // CHECK-COMMON: %[[LE:.*]] = fcmp olt double %[[F]], 0x7FF0000000000000 300 // CHECK-COMMON: %[[OUTOFBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 301 // CHECK-COMMON: %[[INBOUNDS:.*]] = xor i1 %[[OUTOFBOUNDS]], true 302 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 303 304 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow( 305 306 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 307 // CHECK-TRAP-NEXT: unreachable 308 return f; 309 } 310 311 // CHECK-COMMON-LABEL: @int_divide_overflow 312 // CHECK-OVERFLOW-LABEL: @int_divide_overflow 313 int int_divide_overflow(int a, int b) { 314 // CHECK-COMMON: %[[ZERO:.*]] = icmp ne i32 %[[B:.*]], 0 315 // CHECK-OVERFLOW-NOT: icmp ne i32 %{{.*}}, 0 316 317 // CHECK-COMMON: %[[AOK:.*]] = icmp ne i32 %[[A:.*]], -2147483648 318 // CHECK-COMMON-NEXT: %[[BOK:.*]] = icmp ne i32 %[[B]], -1 319 // CHECK-COMMON-NEXT: %[[OVER:.*]] = or i1 %[[AOK]], %[[BOK]] 320 // CHECK-COMMON: %[[OK:.*]] = and i1 %[[ZERO]], %[[OVER]] 321 // CHECK-COMMON: br i1 %[[OK]] 322 323 // CHECK-OVERFLOW: %[[AOK:.*]] = icmp ne i32 %[[A:.*]], -2147483648 324 // CHECK-OVERFLOW-NEXT: %[[BOK:.*]] = icmp ne i32 %[[B:.*]], -1 325 // CHECK-OVERFLOW-NEXT: %[[OK:.*]] = or i1 %[[AOK]], %[[BOK]] 326 // CHECK-OVERFLOW: br i1 %[[OK]] 327 328 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 329 // CHECK-TRAP: unreachable 330 return a / b; 331 332 // CHECK-COMMON: } 333 // CHECK-OVERFLOW: } 334 } 335 336 // CHECK-COMMON-LABEL: @sour_bool 337 _Bool sour_bool(_Bool *p) { 338 // CHECK-COMMON: %[[OK:.*]] = icmp ule i8 {{.*}}, 1 339 // CHECK-COMMON: br i1 %[[OK]] 340 341 // CHECK-UBSAN: call void @__ubsan_handle_load_invalid_value(i8* bitcast ({{.*}}), i64 {{.*}}) 342 343 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 344 // CHECK-TRAP: unreachable 345 return *p; 346 } 347 348 // CHECK-COMMON-LABEL: @ret_nonnull 349 __attribute__((returns_nonnull)) 350 int *ret_nonnull(int *a) { 351 // CHECK-COMMON: [[OK:%.*]] = icmp ne i32* {{.*}}, null 352 // CHECK-COMMON: br i1 [[OK]] 353 354 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_return 355 356 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 357 // CHECK-TRAP: unreachable 358 return a; 359 } 360 361 // CHECK-COMMON-LABEL: @call_decl_nonnull 362 __attribute__((nonnull)) void decl_nonnull(int *a); 363 void call_decl_nonnull(int *a) { 364 // CHECK-COMMON: [[OK:%.*]] = icmp ne i32* {{.*}}, null 365 // CHECK-COMMON: br i1 [[OK]] 366 367 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_arg 368 369 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 370 // CHECK-TRAP: unreachable 371 decl_nonnull(a); 372 } 373 374 extern void *memcpy (void *, const void *, unsigned) __attribute__((nonnull(1, 2))); 375 376 // CHECK-COMMON-LABEL: @call_memcpy_nonnull 377 void call_memcpy_nonnull(void *p, void *q, int sz) { 378 // CHECK-COMMON: icmp ne i8* {{.*}}, null 379 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_arg 380 // CHECK-TRAP: call void @llvm.trap() 381 382 // CHECK-COMMON: icmp ne i8* {{.*}}, null 383 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_arg 384 // CHECK-TRAP: call void @llvm.trap() 385 memcpy(p, q, sz); 386 } 387 388 extern void *memmove (void *, const void *, unsigned) __attribute__((nonnull(1, 2))); 389 390 // CHECK-COMMON-LABEL: @call_memmove_nonnull 391 void call_memmove_nonnull(void *p, void *q, int sz) { 392 // CHECK-COMMON: icmp ne i8* {{.*}}, null 393 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_arg 394 // CHECK-TRAP: call void @llvm.trap() 395 396 // CHECK-COMMON: icmp ne i8* {{.*}}, null 397 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_arg 398 // CHECK-TRAP: call void @llvm.trap() 399 memmove(p, q, sz); 400 } 401 402 // CHECK-COMMON-LABEL: @call_nonnull_variadic 403 __attribute__((nonnull)) void nonnull_variadic(int a, ...); 404 void call_nonnull_variadic(int a, int *b) { 405 // CHECK-COMMON: [[OK:%.*]] = icmp ne i32* {{.*}}, null 406 // CHECK-COMMON: br i1 [[OK]] 407 408 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_arg 409 // CHECK-UBSAN-NOT: __ubsan_handle_nonnull_arg 410 411 // CHECK-COMMON: call void (i32, ...) @nonnull_variadic 412 nonnull_variadic(a, b); 413 } 414 415 // CHECK-UBSAN: ![[WEIGHT_MD]] = !{!"branch_weights", i32 1048575, i32 1} 416 417 // CHECK-TRAP: attributes [[NR_NUW]] = { noreturn nounwind } 418