1 //===-- asan_errors.h -------------------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file is a part of AddressSanitizer, an address sanity checker. 10 // 11 // ASan-private header for error structures. 12 //===----------------------------------------------------------------------===// 13 #ifndef ASAN_ERRORS_H 14 #define ASAN_ERRORS_H 15 16 #include "asan_descriptions.h" 17 #include "asan_scariness_score.h" 18 #include "sanitizer_common/sanitizer_common.h" 19 20 namespace __asan { 21 22 // (*) VS2013 does not implement unrestricted unions, so we need a trivial 23 // default constructor explicitly defined for each particular error. 24 25 // None of the error classes own the stack traces mentioned in them. 26 27 struct ErrorBase { 28 ScarinessScoreBase scariness; 29 u32 tid; 30 31 ErrorBase() = default; // (*) 32 explicit ErrorBase(u32 tid_) : tid(tid_) {} 33 ErrorBase(u32 tid_, int initial_score, const char *reason) : tid(tid_) { 34 scariness.Clear(); 35 scariness.Scare(initial_score, reason); 36 } 37 }; 38 39 struct ErrorDeadlySignal : ErrorBase { 40 SignalContext signal; 41 42 ErrorDeadlySignal() = default; // (*) 43 ErrorDeadlySignal(u32 tid, const SignalContext &sig) 44 : ErrorBase(tid), 45 signal(sig) { 46 scariness.Clear(); 47 if (signal.IsStackOverflow()) { 48 scariness.Scare(10, "stack-overflow"); 49 } else if (!signal.is_memory_access) { 50 scariness.Scare(10, "signal"); 51 } else if (signal.is_true_faulting_addr && 52 signal.addr < GetPageSizeCached()) { 53 scariness.Scare(10, "null-deref"); 54 } else if (signal.addr == signal.pc) { 55 scariness.Scare(60, "wild-jump"); 56 } else if (signal.write_flag == SignalContext::WRITE) { 57 scariness.Scare(30, "wild-addr-write"); 58 } else if (signal.write_flag == SignalContext::READ) { 59 scariness.Scare(20, "wild-addr-read"); 60 } else { 61 scariness.Scare(25, "wild-addr"); 62 } 63 } 64 void Print(); 65 }; 66 67 struct ErrorDoubleFree : ErrorBase { 68 const BufferedStackTrace *second_free_stack; 69 HeapAddressDescription addr_description; 70 71 ErrorDoubleFree() = default; // (*) 72 ErrorDoubleFree(u32 tid, BufferedStackTrace *stack, uptr addr) 73 : ErrorBase(tid, 42, "double-free"), 74 second_free_stack(stack) { 75 CHECK_GT(second_free_stack->size, 0); 76 GetHeapAddressInformation(addr, 1, &addr_description); 77 } 78 void Print(); 79 }; 80 81 struct ErrorNewDeleteTypeMismatch : ErrorBase { 82 const BufferedStackTrace *free_stack; 83 HeapAddressDescription addr_description; 84 uptr delete_size; 85 uptr delete_alignment; 86 87 ErrorNewDeleteTypeMismatch() = default; // (*) 88 ErrorNewDeleteTypeMismatch(u32 tid, BufferedStackTrace *stack, uptr addr, 89 uptr delete_size_, uptr delete_alignment_) 90 : ErrorBase(tid, 10, "new-delete-type-mismatch"), 91 free_stack(stack), 92 delete_size(delete_size_), 93 delete_alignment(delete_alignment_) { 94 GetHeapAddressInformation(addr, 1, &addr_description); 95 } 96 void Print(); 97 }; 98 99 struct ErrorFreeNotMalloced : ErrorBase { 100 const BufferedStackTrace *free_stack; 101 AddressDescription addr_description; 102 103 ErrorFreeNotMalloced() = default; // (*) 104 ErrorFreeNotMalloced(u32 tid, BufferedStackTrace *stack, uptr addr) 105 : ErrorBase(tid, 40, "bad-free"), 106 free_stack(stack), 107 addr_description(addr, /*shouldLockThreadRegistry=*/false) {} 108 void Print(); 109 }; 110 111 struct ErrorAllocTypeMismatch : ErrorBase { 112 const BufferedStackTrace *dealloc_stack; 113 AllocType alloc_type, dealloc_type; 114 AddressDescription addr_description; 115 116 ErrorAllocTypeMismatch() = default; // (*) 117 ErrorAllocTypeMismatch(u32 tid, BufferedStackTrace *stack, uptr addr, 118 AllocType alloc_type_, AllocType dealloc_type_) 119 : ErrorBase(tid, 10, "alloc-dealloc-mismatch"), 120 dealloc_stack(stack), 121 alloc_type(alloc_type_), 122 dealloc_type(dealloc_type_), 123 addr_description(addr, 1, false) {} 124 void Print(); 125 }; 126 127 struct ErrorMallocUsableSizeNotOwned : ErrorBase { 128 const BufferedStackTrace *stack; 129 AddressDescription addr_description; 130 131 ErrorMallocUsableSizeNotOwned() = default; // (*) 132 ErrorMallocUsableSizeNotOwned(u32 tid, BufferedStackTrace *stack_, uptr addr) 133 : ErrorBase(tid, 10, "bad-malloc_usable_size"), 134 stack(stack_), 135 addr_description(addr, /*shouldLockThreadRegistry=*/false) {} 136 void Print(); 137 }; 138 139 struct ErrorSanitizerGetAllocatedSizeNotOwned : ErrorBase { 140 const BufferedStackTrace *stack; 141 AddressDescription addr_description; 142 143 ErrorSanitizerGetAllocatedSizeNotOwned() = default; // (*) 144 ErrorSanitizerGetAllocatedSizeNotOwned(u32 tid, BufferedStackTrace *stack_, 145 uptr addr) 146 : ErrorBase(tid, 10, "bad-__sanitizer_get_allocated_size"), 147 stack(stack_), 148 addr_description(addr, /*shouldLockThreadRegistry=*/false) {} 149 void Print(); 150 }; 151 152 struct ErrorCallocOverflow : ErrorBase { 153 const BufferedStackTrace *stack; 154 uptr count; 155 uptr size; 156 157 ErrorCallocOverflow() = default; // (*) 158 ErrorCallocOverflow(u32 tid, BufferedStackTrace *stack_, uptr count_, 159 uptr size_) 160 : ErrorBase(tid, 10, "calloc-overflow"), 161 stack(stack_), 162 count(count_), 163 size(size_) {} 164 void Print(); 165 }; 166 167 struct ErrorReallocArrayOverflow : ErrorBase { 168 const BufferedStackTrace *stack; 169 uptr count; 170 uptr size; 171 172 ErrorReallocArrayOverflow() = default; // (*) 173 ErrorReallocArrayOverflow(u32 tid, BufferedStackTrace *stack_, uptr count_, 174 uptr size_) 175 : ErrorBase(tid, 10, "reallocarray-overflow"), 176 stack(stack_), 177 count(count_), 178 size(size_) {} 179 void Print(); 180 }; 181 182 struct ErrorPvallocOverflow : ErrorBase { 183 const BufferedStackTrace *stack; 184 uptr size; 185 186 ErrorPvallocOverflow() = default; // (*) 187 ErrorPvallocOverflow(u32 tid, BufferedStackTrace *stack_, uptr size_) 188 : ErrorBase(tid, 10, "pvalloc-overflow"), 189 stack(stack_), 190 size(size_) {} 191 void Print(); 192 }; 193 194 struct ErrorInvalidAllocationAlignment : ErrorBase { 195 const BufferedStackTrace *stack; 196 uptr alignment; 197 198 ErrorInvalidAllocationAlignment() = default; // (*) 199 ErrorInvalidAllocationAlignment(u32 tid, BufferedStackTrace *stack_, 200 uptr alignment_) 201 : ErrorBase(tid, 10, "invalid-allocation-alignment"), 202 stack(stack_), 203 alignment(alignment_) {} 204 void Print(); 205 }; 206 207 struct ErrorInvalidAlignedAllocAlignment : ErrorBase { 208 const BufferedStackTrace *stack; 209 uptr size; 210 uptr alignment; 211 212 ErrorInvalidAlignedAllocAlignment() = default; // (*) 213 ErrorInvalidAlignedAllocAlignment(u32 tid, BufferedStackTrace *stack_, 214 uptr size_, uptr alignment_) 215 : ErrorBase(tid, 10, "invalid-aligned-alloc-alignment"), 216 stack(stack_), 217 size(size_), 218 alignment(alignment_) {} 219 void Print(); 220 }; 221 222 struct ErrorInvalidPosixMemalignAlignment : ErrorBase { 223 const BufferedStackTrace *stack; 224 uptr alignment; 225 226 ErrorInvalidPosixMemalignAlignment() = default; // (*) 227 ErrorInvalidPosixMemalignAlignment(u32 tid, BufferedStackTrace *stack_, 228 uptr alignment_) 229 : ErrorBase(tid, 10, "invalid-posix-memalign-alignment"), 230 stack(stack_), 231 alignment(alignment_) {} 232 void Print(); 233 }; 234 235 struct ErrorAllocationSizeTooBig : ErrorBase { 236 const BufferedStackTrace *stack; 237 uptr user_size; 238 uptr total_size; 239 uptr max_size; 240 241 ErrorAllocationSizeTooBig() = default; // (*) 242 ErrorAllocationSizeTooBig(u32 tid, BufferedStackTrace *stack_, 243 uptr user_size_, uptr total_size_, uptr max_size_) 244 : ErrorBase(tid, 10, "allocation-size-too-big"), 245 stack(stack_), 246 user_size(user_size_), 247 total_size(total_size_), 248 max_size(max_size_) {} 249 void Print(); 250 }; 251 252 struct ErrorRssLimitExceeded : ErrorBase { 253 const BufferedStackTrace *stack; 254 255 ErrorRssLimitExceeded() = default; // (*) 256 ErrorRssLimitExceeded(u32 tid, BufferedStackTrace *stack_) 257 : ErrorBase(tid, 10, "rss-limit-exceeded"), 258 stack(stack_) {} 259 void Print(); 260 }; 261 262 struct ErrorOutOfMemory : ErrorBase { 263 const BufferedStackTrace *stack; 264 uptr requested_size; 265 266 ErrorOutOfMemory() = default; // (*) 267 ErrorOutOfMemory(u32 tid, BufferedStackTrace *stack_, uptr requested_size_) 268 : ErrorBase(tid, 10, "out-of-memory"), 269 stack(stack_), 270 requested_size(requested_size_) {} 271 void Print(); 272 }; 273 274 struct ErrorStringFunctionMemoryRangesOverlap : ErrorBase { 275 const BufferedStackTrace *stack; 276 uptr length1, length2; 277 AddressDescription addr1_description; 278 AddressDescription addr2_description; 279 const char *function; 280 281 ErrorStringFunctionMemoryRangesOverlap() = default; // (*) 282 ErrorStringFunctionMemoryRangesOverlap(u32 tid, BufferedStackTrace *stack_, 283 uptr addr1, uptr length1_, uptr addr2, 284 uptr length2_, const char *function_) 285 : ErrorBase(tid), 286 stack(stack_), 287 length1(length1_), 288 length2(length2_), 289 addr1_description(addr1, length1, /*shouldLockThreadRegistry=*/false), 290 addr2_description(addr2, length2, /*shouldLockThreadRegistry=*/false), 291 function(function_) { 292 char bug_type[100]; 293 internal_snprintf(bug_type, sizeof(bug_type), "%s-param-overlap", function); 294 scariness.Clear(); 295 scariness.Scare(10, bug_type); 296 } 297 void Print(); 298 }; 299 300 struct ErrorStringFunctionSizeOverflow : ErrorBase { 301 const BufferedStackTrace *stack; 302 AddressDescription addr_description; 303 uptr size; 304 305 ErrorStringFunctionSizeOverflow() = default; // (*) 306 ErrorStringFunctionSizeOverflow(u32 tid, BufferedStackTrace *stack_, 307 uptr addr, uptr size_) 308 : ErrorBase(tid, 10, "negative-size-param"), 309 stack(stack_), 310 addr_description(addr, /*shouldLockThreadRegistry=*/false), 311 size(size_) {} 312 void Print(); 313 }; 314 315 struct ErrorBadParamsToAnnotateContiguousContainer : ErrorBase { 316 const BufferedStackTrace *stack; 317 uptr beg, end, old_mid, new_mid; 318 319 ErrorBadParamsToAnnotateContiguousContainer() = default; // (*) 320 // PS4: Do we want an AddressDescription for beg? 321 ErrorBadParamsToAnnotateContiguousContainer(u32 tid, 322 BufferedStackTrace *stack_, 323 uptr beg_, uptr end_, 324 uptr old_mid_, uptr new_mid_) 325 : ErrorBase(tid, 10, "bad-__sanitizer_annotate_contiguous_container"), 326 stack(stack_), 327 beg(beg_), 328 end(end_), 329 old_mid(old_mid_), 330 new_mid(new_mid_) {} 331 void Print(); 332 }; 333 334 struct ErrorODRViolation : ErrorBase { 335 __asan_global global1, global2; 336 u32 stack_id1, stack_id2; 337 338 ErrorODRViolation() = default; // (*) 339 ErrorODRViolation(u32 tid, const __asan_global *g1, u32 stack_id1_, 340 const __asan_global *g2, u32 stack_id2_) 341 : ErrorBase(tid, 10, "odr-violation"), 342 global1(*g1), 343 global2(*g2), 344 stack_id1(stack_id1_), 345 stack_id2(stack_id2_) {} 346 void Print(); 347 }; 348 349 struct ErrorInvalidPointerPair : ErrorBase { 350 uptr pc, bp, sp; 351 AddressDescription addr1_description; 352 AddressDescription addr2_description; 353 354 ErrorInvalidPointerPair() = default; // (*) 355 ErrorInvalidPointerPair(u32 tid, uptr pc_, uptr bp_, uptr sp_, uptr p1, 356 uptr p2) 357 : ErrorBase(tid, 10, "invalid-pointer-pair"), 358 pc(pc_), 359 bp(bp_), 360 sp(sp_), 361 addr1_description(p1, 1, /*shouldLockThreadRegistry=*/false), 362 addr2_description(p2, 1, /*shouldLockThreadRegistry=*/false) {} 363 void Print(); 364 }; 365 366 struct ErrorGeneric : ErrorBase { 367 AddressDescription addr_description; 368 uptr pc, bp, sp; 369 uptr access_size; 370 const char *bug_descr; 371 bool is_write; 372 u8 shadow_val; 373 374 ErrorGeneric() = default; // (*) 375 ErrorGeneric(u32 tid, uptr addr, uptr pc_, uptr bp_, uptr sp_, bool is_write_, 376 uptr access_size_); 377 void Print(); 378 }; 379 380 // clang-format off 381 #define ASAN_FOR_EACH_ERROR_KIND(macro) \ 382 macro(DeadlySignal) \ 383 macro(DoubleFree) \ 384 macro(NewDeleteTypeMismatch) \ 385 macro(FreeNotMalloced) \ 386 macro(AllocTypeMismatch) \ 387 macro(MallocUsableSizeNotOwned) \ 388 macro(SanitizerGetAllocatedSizeNotOwned) \ 389 macro(CallocOverflow) \ 390 macro(ReallocArrayOverflow) \ 391 macro(PvallocOverflow) \ 392 macro(InvalidAllocationAlignment) \ 393 macro(InvalidAlignedAllocAlignment) \ 394 macro(InvalidPosixMemalignAlignment) \ 395 macro(AllocationSizeTooBig) \ 396 macro(RssLimitExceeded) \ 397 macro(OutOfMemory) \ 398 macro(StringFunctionMemoryRangesOverlap) \ 399 macro(StringFunctionSizeOverflow) \ 400 macro(BadParamsToAnnotateContiguousContainer) \ 401 macro(ODRViolation) \ 402 macro(InvalidPointerPair) \ 403 macro(Generic) 404 // clang-format on 405 406 #define ASAN_DEFINE_ERROR_KIND(name) kErrorKind##name, 407 #define ASAN_ERROR_DESCRIPTION_MEMBER(name) Error##name name; 408 #define ASAN_ERROR_DESCRIPTION_CONSTRUCTOR(name) \ 409 ErrorDescription(Error##name const &e) : kind(kErrorKind##name) { \ 410 internal_memcpy(&name, &e, sizeof(name)); \ 411 } 412 #define ASAN_ERROR_DESCRIPTION_PRINT(name) \ 413 case kErrorKind##name: \ 414 return name.Print(); 415 416 enum ErrorKind { 417 kErrorKindInvalid = 0, 418 ASAN_FOR_EACH_ERROR_KIND(ASAN_DEFINE_ERROR_KIND) 419 }; 420 421 struct ErrorDescription { 422 ErrorKind kind; 423 // We're using a tagged union because it allows us to have a trivially 424 // copiable type and use the same structures as the public interface. 425 // 426 // We can add a wrapper around it to make it "more c++-like", but that would 427 // add a lot of code and the benefit wouldn't be that big. 428 union { 429 ErrorBase Base; 430 ASAN_FOR_EACH_ERROR_KIND(ASAN_ERROR_DESCRIPTION_MEMBER) 431 }; 432 433 ErrorDescription() { internal_memset(this, 0, sizeof(*this)); } 434 explicit ErrorDescription(LinkerInitialized) {} 435 ASAN_FOR_EACH_ERROR_KIND(ASAN_ERROR_DESCRIPTION_CONSTRUCTOR) 436 437 bool IsValid() { return kind != kErrorKindInvalid; } 438 void Print() { 439 switch (kind) { 440 ASAN_FOR_EACH_ERROR_KIND(ASAN_ERROR_DESCRIPTION_PRINT) 441 case kErrorKindInvalid: 442 CHECK(0); 443 } 444 CHECK(0); 445 } 446 }; 447 448 #undef ASAN_FOR_EACH_ERROR_KIND 449 #undef ASAN_DEFINE_ERROR_KIND 450 #undef ASAN_ERROR_DESCRIPTION_MEMBER 451 #undef ASAN_ERROR_DESCRIPTION_CONSTRUCTOR 452 #undef ASAN_ERROR_DESCRIPTION_PRINT 453 454 } // namespace __asan 455 456 #endif // ASAN_ERRORS_H 457