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 | opt -instnamer -S | 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 | opt -instnamer -S | FileCheck %s --check-prefix=CHECK-COMMON --check-prefix=CHECK-TRAP 3 // RUN: %clang_cc1 -fsanitize=signed-integer-overflow -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefix=CHECK-OVERFLOW 4 5 // CHECK-UBSAN: @[[INT:.*]] = private unnamed_addr constant { i16, i16, [6 x i8] } { i16 0, i16 11, [6 x i8] c"'int'\00" } 6 7 // FIXME: When we only emit each type once, use [[INT]] more below. 8 // CHECK-UBSAN: @[[LINE_100:.*]] = private unnamed_addr global {{.*}}, i32 100, i32 5 {{.*}} @[[INT]], i8 2, i8 1 9 // CHECK-UBSAN: @[[LINE_200:.*]] = {{.*}}, i32 200, i32 10 {{.*}}, i8 2, i8 0 10 // CHECK-UBSAN: @[[LINE_300:.*]] = {{.*}}, i32 300, i32 12 {{.*}} @{{.*}}, {{.*}} @{{.*}} 11 // CHECK-UBSAN: @[[LINE_400:.*]] = {{.*}}, i32 400, i32 12 {{.*}} @{{.*}}, {{.*}} @{{.*}} 12 // CHECK-UBSAN: @[[LINE_500:.*]] = {{.*}}, i32 500, i32 10 {{.*}} @{{.*}}, i8 2, i8 0 } 13 // CHECK-UBSAN: @[[LINE_600:.*]] = {{.*}}, i32 600, i32 3 {{.*}} @{{.*}}, i8 2, i8 1 } 14 15 // CHECK-UBSAN: @[[STRUCT_S:.*]] = private unnamed_addr constant { i16, i16, [11 x i8] } { i16 -1, i16 0, [11 x i8] c"'struct S'\00" } 16 17 // CHECK-UBSAN: @[[LINE_700:.*]] = {{.*}}, i32 700, i32 14 {{.*}} @[[STRUCT_S]], i8 2, i8 3 } 18 // CHECK-UBSAN: @[[LINE_800:.*]] = {{.*}}, i32 800, i32 12 {{.*}} @{{.*}} } 19 // CHECK-UBSAN: @[[LINE_900:.*]] = {{.*}}, i32 900, i32 11 {{.*}} @{{.*}} } 20 // CHECK-UBSAN: @[[LINE_1000:.*]] = {{.*}}, i32 1000, i32 10 {{.*}} @{{.*}} } 21 // CHECK-UBSAN: @[[FP16:.*]] = private unnamed_addr constant { i16, i16, [9 x i8] } { i16 1, i16 16, [9 x i8] c"'__fp16'\00" } 22 // CHECK-UBSAN: @[[LINE_1100:.*]] = {{.*}}, i32 1100, i32 8 {{.*}} @{{.*}} } 23 // CHECK-UBSAN: @[[LINE_1200:.*]] = {{.*}}, i32 1200, i32 10 {{.*}} @{{.*}} } 24 // CHECK-UBSAN: @[[LINE_1300:.*]] = {{.*}}, i32 1300, i32 10 {{.*}} @{{.*}} } 25 // CHECK-UBSAN: @[[LINE_1400:.*]] = {{.*}}, i32 1400, i32 10 {{.*}} @{{.*}} } 26 // Make sure we check the fp16 type_mismatch data so we can easily match the signed char float_cast_overflow 27 // CHECK-UBSAN: @[[LINE_1500:.*]] = {{.*}}, i32 1500, i32 10 {{.*}} @[[FP16]], {{.*}} } 28 // CHECK-UBSAN: @[[SCHAR:.*]] = private unnamed_addr constant { i16, i16, [14 x i8] } { i16 0, i16 7, [14 x i8] c"'signed char'\00" } 29 // CHECK-UBSAN: @[[LINE_1500:.*]] = {{.*}}, i32 1500, i32 10 {{.*}} @[[FP16]], {{.*}} } 30 // CHECK-UBSAN: @[[LINE_1600:.*]] = {{.*}}, i32 1600, i32 10 {{.*}} @{{.*}} } 31 32 // PR6805 33 // CHECK-COMMON-LABEL: @foo 34 void foo() { 35 union { int i; } u; 36 37 // CHECK-COMMON: %[[I8PTR:.*]] = bitcast i32* %[[PTR:.*]] to i8* 38 // CHECK-COMMON-NEXT: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64.p0i8(i8* %[[I8PTR]], i1 false, i1 false) 39 // CHECK-COMMON-NEXT: %[[OK:.*]] = icmp uge i64 %[[SIZE]], 4 40 41 // CHECK-UBSAN: br i1 %[[OK]], {{.*}} !prof ![[WEIGHT_MD:.*]], !nosanitize 42 // CHECK-TRAP: br i1 %[[OK]], {{.*}} 43 44 // CHECK-UBSAN: %[[ARG:.*]] = ptrtoint {{.*}} %[[PTR]] to i64 45 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_type_mismatch_v1(i8* bitcast ({{.*}} @[[LINE_100]] to i8*), i64 %[[ARG]]) 46 47 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW:#[0-9]+]] 48 // CHECK-TRAP-NEXT: unreachable 49 #line 100 50 u.i=1; 51 } 52 53 // CHECK-COMMON-LABEL: @bar 54 int bar(int *a) { 55 // CHECK-COMMON: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64 56 // CHECK-COMMON-NEXT: icmp uge i64 %[[SIZE]], 4 57 58 // CHECK-COMMON: %[[PTRINT:.*]] = ptrtoint 59 // CHECK-COMMON-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRINT]], 3 60 // CHECK-COMMON-NEXT: icmp eq i64 %[[MISALIGN]], 0 61 62 // CHECK-UBSAN: %[[ARG:.*]] = ptrtoint 63 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_type_mismatch_v1(i8* bitcast ({{.*}} @[[LINE_200]] to i8*), i64 %[[ARG]]) 64 65 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 66 // CHECK-TRAP-NEXT: unreachable 67 68 #line 200 69 return *a; 70 } 71 72 // CHECK-UBSAN-LABEL: @addr_space 73 int addr_space(int __attribute__((address_space(256))) *a) { 74 // CHECK-UBSAN-NOT: __ubsan 75 return *a; 76 } 77 78 // CHECK-COMMON-LABEL: @lsh_overflow 79 int lsh_overflow(int a, int b) { 80 // CHECK-COMMON: %[[RHS_INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31 81 // CHECK-COMMON-NEXT: br i1 %[[RHS_INBOUNDS]], label %[[CHECK_BB:.*]], label %[[CONT_BB:.*]], 82 83 // CHECK-COMMON: [[CHECK_BB]]: 84 // CHECK-COMMON-NEXT: %[[SHIFTED_OUT_WIDTH:.*]] = sub nuw nsw i32 31, %[[RHS]] 85 // CHECK-COMMON-NEXT: %[[SHIFTED_OUT:.*]] = lshr i32 %[[LHS:.*]], %[[SHIFTED_OUT_WIDTH]] 86 // CHECK-COMMON-NEXT: %[[NO_OVERFLOW:.*]] = icmp eq i32 %[[SHIFTED_OUT]], 0 87 // CHECK-COMMON-NEXT: br label %[[CONT_BB]] 88 89 // CHECK-COMMON: [[CONT_BB]]: 90 // CHECK-COMMON-NEXT: %[[VALID_BASE:.*]] = phi i1 [ true, {{.*}} ], [ %[[NO_OVERFLOW]], %[[CHECK_BB]] ] 91 // CHECK-COMMON-NEXT: %[[VALID:.*]] = and i1 %[[RHS_INBOUNDS]], %[[VALID_BASE]] 92 93 // CHECK-UBSAN: br i1 %[[VALID]], {{.*}} !prof ![[WEIGHT_MD]] 94 // CHECK-TRAP: br i1 %[[VALID]] 95 96 // CHECK-UBSAN: %[[ARG1:.*]] = zext 97 // CHECK-UBSAN-NEXT: %[[ARG2:.*]] = zext 98 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_shift_out_of_bounds(i8* bitcast ({{.*}} @[[LINE_300]] to i8*), i64 %[[ARG1]], i64 %[[ARG2]]) 99 // CHECK-UBSAN-NOT: call void @__ubsan_handle_shift_out_of_bounds 100 101 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 102 // CHECK-TRAP: unreachable 103 // CHECK-TRAP-NOT: call void @llvm.trap() 104 105 // CHECK-COMMON: %[[RET:.*]] = shl i32 %[[LHS]], %[[RHS]] 106 // CHECK-COMMON-NEXT: ret i32 %[[RET]] 107 #line 300 108 return a << b; 109 } 110 111 // CHECK-COMMON-LABEL: @rsh_inbounds 112 int rsh_inbounds(int a, int b) { 113 // CHECK-COMMON: %[[INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31 114 // CHECK-COMMON: br i1 %[[INBOUNDS]] 115 116 // CHECK-UBSAN: %[[ARG1:.*]] = zext 117 // CHECK-UBSAN-NEXT: %[[ARG2:.*]] = zext 118 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_shift_out_of_bounds(i8* bitcast ({{.*}} @[[LINE_400]] to i8*), i64 %[[ARG1]], i64 %[[ARG2]]) 119 120 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 121 // CHECK-TRAP-NEXT: unreachable 122 123 // CHECK-COMMON: %[[RET:.*]] = ashr i32 {{.*}}, %[[RHS]] 124 // CHECK-COMMON-NEXT: ret i32 %[[RET]] 125 #line 400 126 return a >> b; 127 } 128 129 // CHECK-COMMON-LABEL: @load 130 int load(int *p) { 131 // CHECK-UBSAN: call void @__ubsan_handle_type_mismatch_v1(i8* bitcast ({{.*}} @[[LINE_500]] to i8*), i64 %{{.*}}) 132 133 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 134 // CHECK-TRAP-NEXT: unreachable 135 #line 500 136 return *p; 137 } 138 139 // CHECK-COMMON-LABEL: @store 140 void store(int *p, int q) { 141 // CHECK-UBSAN: call void @__ubsan_handle_type_mismatch_v1(i8* bitcast ({{.*}} @[[LINE_600]] to i8*), i64 %{{.*}}) 142 143 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 144 // CHECK-TRAP-NEXT: unreachable 145 #line 600 146 *p = q; 147 } 148 149 struct S { int k; }; 150 151 // CHECK-COMMON-LABEL: @member_access 152 int *member_access(struct S *p) { 153 // CHECK-UBSAN: call void @__ubsan_handle_type_mismatch_v1(i8* bitcast ({{.*}} @[[LINE_700]] to i8*), i64 %{{.*}}) 154 155 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 156 // CHECK-TRAP-NEXT: unreachable 157 #line 700 158 return &p->k; 159 } 160 161 // CHECK-COMMON-LABEL: @signed_overflow 162 int signed_overflow(int a, int b) { 163 // CHECK-UBSAN: %[[ARG1:.*]] = zext 164 // CHECK-UBSAN-NEXT: %[[ARG2:.*]] = zext 165 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_add_overflow(i8* bitcast ({{.*}} @[[LINE_800]] to i8*), i64 %[[ARG1]], i64 %[[ARG2]]) 166 167 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 168 // CHECK-TRAP-NEXT: unreachable 169 #line 800 170 return a + b; 171 } 172 173 // CHECK-COMMON-LABEL: @no_return 174 int no_return() { 175 // Reaching the end of a noreturn function is fine in C. 176 // FIXME: If the user explicitly requests -fsanitize=return, we should catch 177 // that here even though it's not undefined behavior. 178 // CHECK-COMMON-NOT: call 179 // CHECK-COMMON-NOT: unreachable 180 // CHECK-COMMON: ret i32 181 } 182 183 // CHECK-UBSAN-LABEL: @vla_bound 184 void vla_bound(int n) { 185 // CHECK-UBSAN: icmp sgt i32 %[[PARAM:.*]], 0 186 // 187 // CHECK-UBSAN: %[[ARG:.*]] = zext i32 %[[PARAM]] to i64 188 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_vla_bound_not_positive(i8* bitcast ({{.*}} @[[LINE_900]] to i8*), i64 %[[ARG]]) 189 #line 900 190 int arr[n * 3]; 191 } 192 193 // CHECK-UBSAN-LABEL: @int_float_no_overflow 194 float int_float_no_overflow(__int128 n) { 195 // CHECK-UBSAN-NOT: call void @__ubsan_handle 196 return n; 197 } 198 199 // CHECK-COMMON-LABEL: @int_float_overflow 200 float int_float_overflow(unsigned __int128 n) { 201 // This is 2**104. FLT_MAX is 2**128 - 2**104. 202 // CHECK-COMMON: %[[INBOUNDS:.*]] = icmp ule i128 %{{.*}}, -20282409603651670423947251286016 203 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 204 205 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow(i8* bitcast ({{.*}} @[[LINE_1000]] to i8*), 206 207 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 208 // CHECK-TRAP-NEXT: unreachable 209 #line 1000 210 return n; 211 } 212 213 // CHECK-COMMON-LABEL: @int_fp16_overflow 214 void int_fp16_overflow(int n, __fp16 *p) { 215 // CHECK-COMMON: %[[GE:.*]] = icmp sge i32 %{{.*}}, -65504 216 // CHECK-COMMON: %[[LE:.*]] = icmp sle i32 %{{.*}}, 65504 217 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 218 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 219 220 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow(i8* bitcast ({{.*}} @[[LINE_1100]] to i8*), 221 222 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 223 // CHECK-TRAP-NEXT: unreachable 224 #line 1100 225 *p = n; 226 } 227 228 // CHECK-COMMON-LABEL: @float_int_overflow 229 int float_int_overflow(float f) { 230 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt float %[[F:.*]], 0xC1E0000020000000 231 // CHECK-COMMON: %[[LE:.*]] = fcmp olt float %[[F]], 0x41E0000000000000 232 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 233 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 234 235 // CHECK-UBSAN: %[[CAST:.*]] = bitcast float %[[F]] to i32 236 // CHECK-UBSAN: %[[ARG:.*]] = zext i32 %[[CAST]] to i64 237 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow(i8* bitcast ({{.*}} @[[LINE_1200]] to i8*), i64 %[[ARG]] 238 239 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 240 // CHECK-TRAP-NEXT: unreachable 241 #line 1200 242 return f; 243 } 244 245 // CHECK-COMMON-LABEL: @long_double_int_overflow 246 int long_double_int_overflow(long double ld) { 247 // CHECK-UBSAN: alloca x86_fp80 248 249 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt x86_fp80 %[[F:.*]], 0xKC01E800000010000000 250 // CHECK-COMMON: %[[LE:.*]] = fcmp olt x86_fp80 %[[F]], 0xK401E800000000000000 251 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 252 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 253 254 // CHECK-UBSAN: store x86_fp80 %[[F]], x86_fp80* %[[ALLOCA:.*]], align 16, !nosanitize 255 // CHECK-UBSAN: %[[ARG:.*]] = ptrtoint x86_fp80* %[[ALLOCA]] to i64 256 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow(i8* bitcast ({{.*}} @[[LINE_1300]] to i8*), i64 %[[ARG]] 257 258 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 259 // CHECK-TRAP-NEXT: unreachable 260 #line 1300 261 return ld; 262 } 263 264 // CHECK-COMMON-LABEL: @float_uint_overflow 265 unsigned float_uint_overflow(float f) { 266 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt float %[[F:.*]], -1.{{0*}}e+00 267 // CHECK-COMMON: %[[LE:.*]] = fcmp olt float %[[F]], 0x41F0000000000000 268 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 269 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 270 271 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow(i8* bitcast ({{.*}} @[[LINE_1400]] to i8*), 272 273 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 274 // CHECK-TRAP-NEXT: unreachable 275 #line 1400 276 return f; 277 } 278 279 // CHECK-COMMON-LABEL: @fp16_char_overflow 280 signed char fp16_char_overflow(__fp16 *p) { 281 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt float %[[F:.*]], -1.29{{0*}}e+02 282 // CHECK-COMMON: %[[LE:.*]] = fcmp olt float %[[F]], 1.28{{0*}}e+02 283 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 284 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 285 286 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow(i8* bitcast ({{.*}} @[[LINE_1500]] to i8*), 287 288 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 289 // CHECK-TRAP-NEXT: unreachable 290 #line 1500 291 return *p; 292 } 293 294 // CHECK-COMMON-LABEL: @float_float_overflow 295 float float_float_overflow(double f) { 296 // CHECK-COMMON: %[[F:.*]] = call double @llvm.fabs.f64( 297 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt double %[[F]], 0x47EFFFFFE0000000 298 // CHECK-COMMON: %[[LE:.*]] = fcmp olt double %[[F]], 0x7FF0000000000000 299 // CHECK-COMMON: %[[OUTOFBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 300 // CHECK-COMMON: %[[INBOUNDS:.*]] = xor i1 %[[OUTOFBOUNDS]], true 301 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 302 303 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow(i8* bitcast ({{.*}} @[[LINE_1600]] to i8*), 304 305 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 306 // CHECK-TRAP-NEXT: unreachable 307 #line 1600 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