asan_test.cc revision 73700ac2a7ced591261ad11199d9d4a7112304bb
1//===-- asan_test.cc ------------------------------------------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file is a part of AddressSanitizer, an address sanity checker. 11// 12//===----------------------------------------------------------------------===// 13#include "asan_test_utils.h" 14 15NOINLINE void *malloc_fff(size_t size) { 16 void *res = malloc/**/(size); break_optimization(0); return res;} 17NOINLINE void *malloc_eee(size_t size) { 18 void *res = malloc_fff(size); break_optimization(0); return res;} 19NOINLINE void *malloc_ddd(size_t size) { 20 void *res = malloc_eee(size); break_optimization(0); return res;} 21NOINLINE void *malloc_ccc(size_t size) { 22 void *res = malloc_ddd(size); break_optimization(0); return res;} 23NOINLINE void *malloc_bbb(size_t size) { 24 void *res = malloc_ccc(size); break_optimization(0); return res;} 25NOINLINE void *malloc_aaa(size_t size) { 26 void *res = malloc_bbb(size); break_optimization(0); return res;} 27 28#ifndef __APPLE__ 29NOINLINE void *memalign_fff(size_t alignment, size_t size) { 30 void *res = memalign/**/(alignment, size); break_optimization(0); return res;} 31NOINLINE void *memalign_eee(size_t alignment, size_t size) { 32 void *res = memalign_fff(alignment, size); break_optimization(0); return res;} 33NOINLINE void *memalign_ddd(size_t alignment, size_t size) { 34 void *res = memalign_eee(alignment, size); break_optimization(0); return res;} 35NOINLINE void *memalign_ccc(size_t alignment, size_t size) { 36 void *res = memalign_ddd(alignment, size); break_optimization(0); return res;} 37NOINLINE void *memalign_bbb(size_t alignment, size_t size) { 38 void *res = memalign_ccc(alignment, size); break_optimization(0); return res;} 39NOINLINE void *memalign_aaa(size_t alignment, size_t size) { 40 void *res = memalign_bbb(alignment, size); break_optimization(0); return res;} 41#endif // __APPLE__ 42 43 44NOINLINE void free_ccc(void *p) { free(p); break_optimization(0);} 45NOINLINE void free_bbb(void *p) { free_ccc(p); break_optimization(0);} 46NOINLINE void free_aaa(void *p) { free_bbb(p); break_optimization(0);} 47 48 49template<typename T> 50NOINLINE void uaf_test(int size, int off) { 51 char *p = (char *)malloc_aaa(size); 52 free_aaa(p); 53 for (int i = 1; i < 100; i++) 54 free_aaa(malloc_aaa(i)); 55 fprintf(stderr, "writing %ld byte(s) at %p with offset %d\n", 56 (long)sizeof(T), p, off); 57 asan_write((T*)(p + off)); 58} 59 60TEST(AddressSanitizer, HasFeatureAddressSanitizerTest) { 61#if defined(__has_feature) && __has_feature(address_sanitizer) 62 bool asan = 1; 63#elif defined(__SANITIZE_ADDRESS__) 64 bool asan = 1; 65#else 66 bool asan = 0; 67#endif 68 EXPECT_EQ(true, asan); 69} 70 71TEST(AddressSanitizer, SimpleDeathTest) { 72 EXPECT_DEATH(exit(1), ""); 73} 74 75TEST(AddressSanitizer, VariousMallocsTest) { 76 int *a = (int*)malloc(100 * sizeof(int)); 77 a[50] = 0; 78 free(a); 79 80 int *r = (int*)malloc(10); 81 r = (int*)realloc(r, 2000 * sizeof(int)); 82 r[1000] = 0; 83 free(r); 84 85 int *b = new int[100]; 86 b[50] = 0; 87 delete [] b; 88 89 int *c = new int; 90 *c = 0; 91 delete c; 92 93#if !defined(__APPLE__) && !defined(ANDROID) && !defined(__ANDROID__) 94 int *pm; 95 int pm_res = posix_memalign((void**)&pm, kPageSize, kPageSize); 96 EXPECT_EQ(0, pm_res); 97 free(pm); 98#endif 99 100#if !defined(__APPLE__) 101 int *ma = (int*)memalign(kPageSize, kPageSize); 102 EXPECT_EQ(0U, (uintptr_t)ma % kPageSize); 103 ma[123] = 0; 104 free(ma); 105#endif // __APPLE__ 106} 107 108TEST(AddressSanitizer, CallocTest) { 109 int *a = (int*)calloc(100, sizeof(int)); 110 EXPECT_EQ(0, a[10]); 111 free(a); 112} 113 114TEST(AddressSanitizer, VallocTest) { 115 void *a = valloc(100); 116 EXPECT_EQ(0U, (uintptr_t)a % kPageSize); 117 free(a); 118} 119 120#ifndef __APPLE__ 121TEST(AddressSanitizer, PvallocTest) { 122 char *a = (char*)pvalloc(kPageSize + 100); 123 EXPECT_EQ(0U, (uintptr_t)a % kPageSize); 124 a[kPageSize + 101] = 1; // we should not report an error here. 125 free(a); 126 127 a = (char*)pvalloc(0); // pvalloc(0) should allocate at least one page. 128 EXPECT_EQ(0U, (uintptr_t)a % kPageSize); 129 a[101] = 1; // we should not report an error here. 130 free(a); 131} 132#endif // __APPLE__ 133 134void *TSDWorker(void *test_key) { 135 if (test_key) { 136 pthread_setspecific(*(pthread_key_t*)test_key, (void*)0xfeedface); 137 } 138 return NULL; 139} 140 141void TSDDestructor(void *tsd) { 142 // Spawning a thread will check that the current thread id is not -1. 143 pthread_t th; 144 PTHREAD_CREATE(&th, NULL, TSDWorker, NULL); 145 PTHREAD_JOIN(th, NULL); 146} 147 148// This tests triggers the thread-specific data destruction fiasco which occurs 149// if we don't manage the TSD destructors ourselves. We create a new pthread 150// key with a non-NULL destructor which is likely to be put after the destructor 151// of AsanThread in the list of destructors. 152// In this case the TSD for AsanThread will be destroyed before TSDDestructor 153// is called for the child thread, and a CHECK will fail when we call 154// pthread_create() to spawn the grandchild. 155TEST(AddressSanitizer, DISABLED_TSDTest) { 156 pthread_t th; 157 pthread_key_t test_key; 158 pthread_key_create(&test_key, TSDDestructor); 159 PTHREAD_CREATE(&th, NULL, TSDWorker, &test_key); 160 PTHREAD_JOIN(th, NULL); 161 pthread_key_delete(test_key); 162} 163 164TEST(AddressSanitizer, UAF_char) { 165 const char *uaf_string = "AddressSanitizer:.*heap-use-after-free"; 166 EXPECT_DEATH(uaf_test<U1>(1, 0), uaf_string); 167 EXPECT_DEATH(uaf_test<U1>(10, 0), uaf_string); 168 EXPECT_DEATH(uaf_test<U1>(10, 10), uaf_string); 169 EXPECT_DEATH(uaf_test<U1>(kLargeMalloc, 0), uaf_string); 170 EXPECT_DEATH(uaf_test<U1>(kLargeMalloc, kLargeMalloc / 2), uaf_string); 171} 172 173#if ASAN_HAS_BLACKLIST 174TEST(AddressSanitizer, IgnoreTest) { 175 int *x = Ident(new int); 176 delete Ident(x); 177 *x = 0; 178} 179#endif // ASAN_HAS_BLACKLIST 180 181struct StructWithBitField { 182 int bf1:1; 183 int bf2:1; 184 int bf3:1; 185 int bf4:29; 186}; 187 188TEST(AddressSanitizer, BitFieldPositiveTest) { 189 StructWithBitField *x = new StructWithBitField; 190 delete Ident(x); 191 EXPECT_DEATH(x->bf1 = 0, "use-after-free"); 192 EXPECT_DEATH(x->bf2 = 0, "use-after-free"); 193 EXPECT_DEATH(x->bf3 = 0, "use-after-free"); 194 EXPECT_DEATH(x->bf4 = 0, "use-after-free"); 195} 196 197struct StructWithBitFields_8_24 { 198 int a:8; 199 int b:24; 200}; 201 202TEST(AddressSanitizer, BitFieldNegativeTest) { 203 StructWithBitFields_8_24 *x = Ident(new StructWithBitFields_8_24); 204 x->a = 0; 205 x->b = 0; 206 delete Ident(x); 207} 208 209TEST(AddressSanitizer, OutOfMemoryTest) { 210 size_t size = SANITIZER_WORDSIZE == 64 ? (size_t)(1ULL << 48) : (0xf0000000); 211 EXPECT_EQ(0, realloc(0, size)); 212 EXPECT_EQ(0, realloc(0, ~Ident(0))); 213 EXPECT_EQ(0, malloc(size)); 214 EXPECT_EQ(0, malloc(~Ident(0))); 215 EXPECT_EQ(0, calloc(1, size)); 216 EXPECT_EQ(0, calloc(1, ~Ident(0))); 217} 218 219#if ASAN_NEEDS_SEGV 220namespace { 221 222const char kUnknownCrash[] = "AddressSanitizer: SEGV on unknown address"; 223const char kOverriddenHandler[] = "ASan signal handler has been overridden\n"; 224 225TEST(AddressSanitizer, WildAddressTest) { 226 char *c = (char*)0x123; 227 EXPECT_DEATH(*c = 0, kUnknownCrash); 228} 229 230void my_sigaction_sighandler(int, siginfo_t*, void*) { 231 fprintf(stderr, kOverriddenHandler); 232 exit(1); 233} 234 235void my_signal_sighandler(int signum) { 236 fprintf(stderr, kOverriddenHandler); 237 exit(1); 238} 239 240TEST(AddressSanitizer, SignalTest) { 241 struct sigaction sigact; 242 memset(&sigact, 0, sizeof(sigact)); 243 sigact.sa_sigaction = my_sigaction_sighandler; 244 sigact.sa_flags = SA_SIGINFO; 245 // ASan should silently ignore sigaction()... 246 EXPECT_EQ(0, sigaction(SIGSEGV, &sigact, 0)); 247#ifdef __APPLE__ 248 EXPECT_EQ(0, sigaction(SIGBUS, &sigact, 0)); 249#endif 250 char *c = (char*)0x123; 251 EXPECT_DEATH(*c = 0, kUnknownCrash); 252 // ... and signal(). 253 EXPECT_EQ(0, signal(SIGSEGV, my_signal_sighandler)); 254 EXPECT_DEATH(*c = 0, kUnknownCrash); 255} 256} // namespace 257#endif 258 259static void MallocStress(size_t n) { 260 uint32_t seed = my_rand(); 261 for (size_t iter = 0; iter < 10; iter++) { 262 vector<void *> vec; 263 for (size_t i = 0; i < n; i++) { 264 if ((i % 3) == 0) { 265 if (vec.empty()) continue; 266 size_t idx = my_rand_r(&seed) % vec.size(); 267 void *ptr = vec[idx]; 268 vec[idx] = vec.back(); 269 vec.pop_back(); 270 free_aaa(ptr); 271 } else { 272 size_t size = my_rand_r(&seed) % 1000 + 1; 273#ifndef __APPLE__ 274 size_t alignment = 1 << (my_rand_r(&seed) % 7 + 3); 275 char *ptr = (char*)memalign_aaa(alignment, size); 276#else 277 char *ptr = (char*) malloc_aaa(size); 278#endif 279 vec.push_back(ptr); 280 ptr[0] = 0; 281 ptr[size-1] = 0; 282 ptr[size/2] = 0; 283 } 284 } 285 for (size_t i = 0; i < vec.size(); i++) 286 free_aaa(vec[i]); 287 } 288} 289 290TEST(AddressSanitizer, MallocStressTest) { 291 MallocStress((ASAN_LOW_MEMORY) ? 20000 : 200000); 292} 293 294static void TestLargeMalloc(size_t size) { 295 char buff[1024]; 296 sprintf(buff, "is located 1 bytes to the left of %lu-byte", (long)size); 297 EXPECT_DEATH(Ident((char*)malloc(size))[-1] = 0, buff); 298} 299 300TEST(AddressSanitizer, LargeMallocTest) { 301 for (int i = 113; i < (1 << 28); i = i * 2 + 13) { 302 TestLargeMalloc(i); 303 } 304} 305 306#if ASAN_LOW_MEMORY != 1 307TEST(AddressSanitizer, HugeMallocTest) { 308#ifdef __APPLE__ 309 // It was empirically found out that 1215 megabytes is the maximum amount of 310 // memory available to the process under AddressSanitizer on 32-bit Mac 10.6. 311 // 32-bit Mac 10.7 gives even less (< 1G). 312 // (the libSystem malloc() allows allocating up to 2300 megabytes without 313 // ASan). 314 size_t n_megs = SANITIZER_WORDSIZE == 32 ? 500 : 4100; 315#else 316 size_t n_megs = SANITIZER_WORDSIZE == 32 ? 2600 : 4100; 317#endif 318 TestLargeMalloc(n_megs << 20); 319} 320#endif 321 322#ifndef __APPLE__ 323void MemalignRun(size_t align, size_t size, int idx) { 324 char *p = (char *)memalign(align, size); 325 Ident(p)[idx] = 0; 326 free(p); 327} 328 329TEST(AddressSanitizer, memalign) { 330 for (int align = 16; align <= (1 << 23); align *= 2) { 331 size_t size = align * 5; 332 EXPECT_DEATH(MemalignRun(align, size, -1), 333 "is located 1 bytes to the left"); 334 EXPECT_DEATH(MemalignRun(align, size, size + 1), 335 "is located 1 bytes to the right"); 336 } 337} 338#endif 339 340TEST(AddressSanitizer, ThreadedMallocStressTest) { 341 const int kNumThreads = 4; 342 const int kNumIterations = (ASAN_LOW_MEMORY) ? 10000 : 100000; 343 pthread_t t[kNumThreads]; 344 for (int i = 0; i < kNumThreads; i++) { 345 PTHREAD_CREATE(&t[i], 0, (void* (*)(void *x))MallocStress, 346 (void*)kNumIterations); 347 } 348 for (int i = 0; i < kNumThreads; i++) { 349 PTHREAD_JOIN(t[i], 0); 350 } 351} 352 353void *ManyThreadsWorker(void *a) { 354 for (int iter = 0; iter < 100; iter++) { 355 for (size_t size = 100; size < 2000; size *= 2) { 356 free(Ident(malloc(size))); 357 } 358 } 359 return 0; 360} 361 362TEST(AddressSanitizer, ManyThreadsTest) { 363 const size_t kNumThreads = 364 (SANITIZER_WORDSIZE == 32 || ASAN_AVOID_EXPENSIVE_TESTS) ? 30 : 1000; 365 pthread_t t[kNumThreads]; 366 for (size_t i = 0; i < kNumThreads; i++) { 367 PTHREAD_CREATE(&t[i], 0, ManyThreadsWorker, (void*)i); 368 } 369 for (size_t i = 0; i < kNumThreads; i++) { 370 PTHREAD_JOIN(t[i], 0); 371 } 372} 373 374TEST(AddressSanitizer, ReallocTest) { 375 const int kMinElem = 5; 376 int *ptr = (int*)malloc(sizeof(int) * kMinElem); 377 ptr[3] = 3; 378 for (int i = 0; i < 10000; i++) { 379 ptr = (int*)realloc(ptr, 380 (my_rand() % 1000 + kMinElem) * sizeof(int)); 381 EXPECT_EQ(3, ptr[3]); 382 } 383 free(ptr); 384 // Realloc pointer returned by malloc(0). 385 int *ptr2 = Ident((int*)malloc(0)); 386 ptr2 = Ident((int*)realloc(ptr2, sizeof(*ptr2))); 387 *ptr2 = 42; 388 EXPECT_EQ(42, *ptr2); 389 free(ptr2); 390} 391 392TEST(AddressSanitizer, ZeroSizeMallocTest) { 393 // Test that malloc(0) and similar functions don't return NULL. 394 void *ptr = Ident(malloc(0)); 395 EXPECT_TRUE(NULL != ptr); 396 free(ptr); 397#if !defined(__APPLE__) && !defined(ANDROID) && !defined(__ANDROID__) 398 int pm_res = posix_memalign(&ptr, 1<<20, 0); 399 EXPECT_EQ(0, pm_res); 400 EXPECT_TRUE(NULL != ptr); 401 free(ptr); 402#endif 403 int *int_ptr = new int[0]; 404 int *int_ptr2 = new int[0]; 405 EXPECT_TRUE(NULL != int_ptr); 406 EXPECT_TRUE(NULL != int_ptr2); 407 EXPECT_NE(int_ptr, int_ptr2); 408 delete[] int_ptr; 409 delete[] int_ptr2; 410} 411 412#ifndef __APPLE__ 413static const char *kMallocUsableSizeErrorMsg = 414 "AddressSanitizer: attempting to call malloc_usable_size()"; 415 416TEST(AddressSanitizer, MallocUsableSizeTest) { 417 const size_t kArraySize = 100; 418 char *array = Ident((char*)malloc(kArraySize)); 419 int *int_ptr = Ident(new int); 420 EXPECT_EQ(0U, malloc_usable_size(NULL)); 421 EXPECT_EQ(kArraySize, malloc_usable_size(array)); 422 EXPECT_EQ(sizeof(int), malloc_usable_size(int_ptr)); 423 EXPECT_DEATH(malloc_usable_size((void*)0x123), kMallocUsableSizeErrorMsg); 424 EXPECT_DEATH(malloc_usable_size(array + kArraySize / 2), 425 kMallocUsableSizeErrorMsg); 426 free(array); 427 EXPECT_DEATH(malloc_usable_size(array), kMallocUsableSizeErrorMsg); 428} 429#endif 430 431void WrongFree() { 432 int *x = (int*)malloc(100 * sizeof(int)); 433 // Use the allocated memory, otherwise Clang will optimize it out. 434 Ident(x); 435 free(x + 1); 436} 437 438TEST(AddressSanitizer, WrongFreeTest) { 439 EXPECT_DEATH(WrongFree(), 440 "ERROR: AddressSanitizer: attempting free.*not malloc"); 441} 442 443void DoubleFree() { 444 int *x = (int*)malloc(100 * sizeof(int)); 445 fprintf(stderr, "DoubleFree: x=%p\n", x); 446 free(x); 447 free(x); 448 fprintf(stderr, "should have failed in the second free(%p)\n", x); 449 abort(); 450} 451 452TEST(AddressSanitizer, DoubleFreeTest) { 453 EXPECT_DEATH(DoubleFree(), ASAN_PCRE_DOTALL 454 "ERROR: AddressSanitizer: attempting double-free" 455 ".*is located 0 bytes inside of 400-byte region" 456 ".*freed by thread T0 here" 457 ".*previously allocated by thread T0 here"); 458} 459 460template<int kSize> 461NOINLINE void SizedStackTest() { 462 char a[kSize]; 463 char *A = Ident((char*)&a); 464 for (size_t i = 0; i < kSize; i++) 465 A[i] = i; 466 EXPECT_DEATH(A[-1] = 0, ""); 467 EXPECT_DEATH(A[-20] = 0, ""); 468 EXPECT_DEATH(A[-31] = 0, ""); 469 EXPECT_DEATH(A[kSize] = 0, ""); 470 EXPECT_DEATH(A[kSize + 1] = 0, ""); 471 EXPECT_DEATH(A[kSize + 10] = 0, ""); 472 EXPECT_DEATH(A[kSize + 31] = 0, ""); 473} 474 475TEST(AddressSanitizer, SimpleStackTest) { 476 SizedStackTest<1>(); 477 SizedStackTest<2>(); 478 SizedStackTest<3>(); 479 SizedStackTest<4>(); 480 SizedStackTest<5>(); 481 SizedStackTest<6>(); 482 SizedStackTest<7>(); 483 SizedStackTest<16>(); 484 SizedStackTest<25>(); 485 SizedStackTest<34>(); 486 SizedStackTest<43>(); 487 SizedStackTest<51>(); 488 SizedStackTest<62>(); 489 SizedStackTest<64>(); 490 SizedStackTest<128>(); 491} 492 493TEST(AddressSanitizer, ManyStackObjectsTest) { 494 char XXX[10]; 495 char YYY[20]; 496 char ZZZ[30]; 497 Ident(XXX); 498 Ident(YYY); 499 EXPECT_DEATH(Ident(ZZZ)[-1] = 0, ASAN_PCRE_DOTALL "XXX.*YYY.*ZZZ"); 500} 501 502NOINLINE static void Frame0(int frame, char *a, char *b, char *c) { 503 char d[4] = {0}; 504 char *D = Ident(d); 505 switch (frame) { 506 case 3: a[5]++; break; 507 case 2: b[5]++; break; 508 case 1: c[5]++; break; 509 case 0: D[5]++; break; 510 } 511} 512NOINLINE static void Frame1(int frame, char *a, char *b) { 513 char c[4] = {0}; Frame0(frame, a, b, c); 514 break_optimization(0); 515} 516NOINLINE static void Frame2(int frame, char *a) { 517 char b[4] = {0}; Frame1(frame, a, b); 518 break_optimization(0); 519} 520NOINLINE static void Frame3(int frame) { 521 char a[4] = {0}; Frame2(frame, a); 522 break_optimization(0); 523} 524 525TEST(AddressSanitizer, GuiltyStackFrame0Test) { 526 EXPECT_DEATH(Frame3(0), "located .*in frame <.*Frame0"); 527} 528TEST(AddressSanitizer, GuiltyStackFrame1Test) { 529 EXPECT_DEATH(Frame3(1), "located .*in frame <.*Frame1"); 530} 531TEST(AddressSanitizer, GuiltyStackFrame2Test) { 532 EXPECT_DEATH(Frame3(2), "located .*in frame <.*Frame2"); 533} 534TEST(AddressSanitizer, GuiltyStackFrame3Test) { 535 EXPECT_DEATH(Frame3(3), "located .*in frame <.*Frame3"); 536} 537 538NOINLINE void LongJmpFunc1(jmp_buf buf) { 539 // create three red zones for these two stack objects. 540 int a; 541 int b; 542 543 int *A = Ident(&a); 544 int *B = Ident(&b); 545 *A = *B; 546 longjmp(buf, 1); 547} 548 549NOINLINE void BuiltinLongJmpFunc1(jmp_buf buf) { 550 // create three red zones for these two stack objects. 551 int a; 552 int b; 553 554 int *A = Ident(&a); 555 int *B = Ident(&b); 556 *A = *B; 557 __builtin_longjmp((void**)buf, 1); 558} 559 560NOINLINE void UnderscopeLongJmpFunc1(jmp_buf buf) { 561 // create three red zones for these two stack objects. 562 int a; 563 int b; 564 565 int *A = Ident(&a); 566 int *B = Ident(&b); 567 *A = *B; 568 _longjmp(buf, 1); 569} 570 571NOINLINE void SigLongJmpFunc1(sigjmp_buf buf) { 572 // create three red zones for these two stack objects. 573 int a; 574 int b; 575 576 int *A = Ident(&a); 577 int *B = Ident(&b); 578 *A = *B; 579 siglongjmp(buf, 1); 580} 581 582 583NOINLINE void TouchStackFunc() { 584 int a[100]; // long array will intersect with redzones from LongJmpFunc1. 585 int *A = Ident(a); 586 for (int i = 0; i < 100; i++) 587 A[i] = i*i; 588} 589 590// Test that we handle longjmp and do not report fals positives on stack. 591TEST(AddressSanitizer, LongJmpTest) { 592 static jmp_buf buf; 593 if (!setjmp(buf)) { 594 LongJmpFunc1(buf); 595 } else { 596 TouchStackFunc(); 597 } 598} 599 600#if not defined(__ANDROID__) 601TEST(AddressSanitizer, BuiltinLongJmpTest) { 602 static jmp_buf buf; 603 if (!__builtin_setjmp((void**)buf)) { 604 BuiltinLongJmpFunc1(buf); 605 } else { 606 TouchStackFunc(); 607 } 608} 609#endif // not defined(__ANDROID__) 610 611TEST(AddressSanitizer, UnderscopeLongJmpTest) { 612 static jmp_buf buf; 613 if (!_setjmp(buf)) { 614 UnderscopeLongJmpFunc1(buf); 615 } else { 616 TouchStackFunc(); 617 } 618} 619 620TEST(AddressSanitizer, SigLongJmpTest) { 621 static sigjmp_buf buf; 622 if (!sigsetjmp(buf, 1)) { 623 SigLongJmpFunc1(buf); 624 } else { 625 TouchStackFunc(); 626 } 627} 628 629#ifdef __EXCEPTIONS 630NOINLINE void ThrowFunc() { 631 // create three red zones for these two stack objects. 632 int a; 633 int b; 634 635 int *A = Ident(&a); 636 int *B = Ident(&b); 637 *A = *B; 638 ASAN_THROW(1); 639} 640 641TEST(AddressSanitizer, CxxExceptionTest) { 642 if (ASAN_UAR) return; 643 // TODO(kcc): this test crashes on 32-bit for some reason... 644 if (SANITIZER_WORDSIZE == 32) return; 645 try { 646 ThrowFunc(); 647 } catch(...) {} 648 TouchStackFunc(); 649} 650#endif 651 652void *ThreadStackReuseFunc1(void *unused) { 653 // create three red zones for these two stack objects. 654 int a; 655 int b; 656 657 int *A = Ident(&a); 658 int *B = Ident(&b); 659 *A = *B; 660 pthread_exit(0); 661 return 0; 662} 663 664void *ThreadStackReuseFunc2(void *unused) { 665 TouchStackFunc(); 666 return 0; 667} 668 669TEST(AddressSanitizer, ThreadStackReuseTest) { 670 pthread_t t; 671 PTHREAD_CREATE(&t, 0, ThreadStackReuseFunc1, 0); 672 PTHREAD_JOIN(t, 0); 673 PTHREAD_CREATE(&t, 0, ThreadStackReuseFunc2, 0); 674 PTHREAD_JOIN(t, 0); 675} 676 677#if defined(__i386__) || defined(__x86_64__) 678TEST(AddressSanitizer, Store128Test) { 679 char *a = Ident((char*)malloc(Ident(12))); 680 char *p = a; 681 if (((uintptr_t)a % 16) != 0) 682 p = a + 8; 683 assert(((uintptr_t)p % 16) == 0); 684 __m128i value_wide = _mm_set1_epi16(0x1234); 685 EXPECT_DEATH(_mm_store_si128((__m128i*)p, value_wide), 686 "AddressSanitizer: heap-buffer-overflow"); 687 EXPECT_DEATH(_mm_store_si128((__m128i*)p, value_wide), 688 "WRITE of size 16"); 689 EXPECT_DEATH(_mm_store_si128((__m128i*)p, value_wide), 690 "located 0 bytes to the right of 12-byte"); 691 free(a); 692} 693#endif 694 695string RightOOBErrorMessage(int oob_distance, bool is_write) { 696 assert(oob_distance >= 0); 697 char expected_str[100]; 698 sprintf(expected_str, ASAN_PCRE_DOTALL "%s.*located %d bytes to the right", 699 is_write ? "WRITE" : "READ", oob_distance); 700 return string(expected_str); 701} 702 703string RightOOBWriteMessage(int oob_distance) { 704 return RightOOBErrorMessage(oob_distance, /*is_write*/true); 705} 706 707string RightOOBReadMessage(int oob_distance) { 708 return RightOOBErrorMessage(oob_distance, /*is_write*/false); 709} 710 711string LeftOOBErrorMessage(int oob_distance, bool is_write) { 712 assert(oob_distance > 0); 713 char expected_str[100]; 714 sprintf(expected_str, ASAN_PCRE_DOTALL "%s.*located %d bytes to the left", 715 is_write ? "WRITE" : "READ", oob_distance); 716 return string(expected_str); 717} 718 719string LeftOOBWriteMessage(int oob_distance) { 720 return LeftOOBErrorMessage(oob_distance, /*is_write*/true); 721} 722 723string LeftOOBReadMessage(int oob_distance) { 724 return LeftOOBErrorMessage(oob_distance, /*is_write*/false); 725} 726 727string LeftOOBAccessMessage(int oob_distance) { 728 assert(oob_distance > 0); 729 char expected_str[100]; 730 sprintf(expected_str, "located %d bytes to the left", oob_distance); 731 return string(expected_str); 732} 733 734char* MallocAndMemsetString(size_t size, char ch) { 735 char *s = Ident((char*)malloc(size)); 736 memset(s, ch, size); 737 return s; 738} 739 740char* MallocAndMemsetString(size_t size) { 741 return MallocAndMemsetString(size, 'z'); 742} 743 744#if defined(__linux__) && !defined(ANDROID) && !defined(__ANDROID__) 745#define READ_TEST(READ_N_BYTES) \ 746 char *x = new char[10]; \ 747 int fd = open("/proc/self/stat", O_RDONLY); \ 748 ASSERT_GT(fd, 0); \ 749 EXPECT_DEATH(READ_N_BYTES, \ 750 ASAN_PCRE_DOTALL \ 751 "AddressSanitizer: heap-buffer-overflow" \ 752 ".* is located 0 bytes to the right of 10-byte region"); \ 753 close(fd); \ 754 delete [] x; \ 755 756TEST(AddressSanitizer, pread) { 757 READ_TEST(pread(fd, x, 15, 0)); 758} 759 760TEST(AddressSanitizer, pread64) { 761 READ_TEST(pread64(fd, x, 15, 0)); 762} 763 764TEST(AddressSanitizer, read) { 765 READ_TEST(read(fd, x, 15)); 766} 767#endif // defined(__linux__) && !defined(ANDROID) && !defined(__ANDROID__) 768 769// This test case fails 770// Clang optimizes memcpy/memset calls which lead to unaligned access 771TEST(AddressSanitizer, DISABLED_MemIntrinsicUnalignedAccessTest) { 772 int size = Ident(4096); 773 char *s = Ident((char*)malloc(size)); 774 EXPECT_DEATH(memset(s + size - 1, 0, 2), RightOOBWriteMessage(0)); 775 free(s); 776} 777 778// TODO(samsonov): Add a test with malloc(0) 779// TODO(samsonov): Add tests for str* and mem* functions. 780 781NOINLINE static int LargeFunction(bool do_bad_access) { 782 int *x = new int[100]; 783 x[0]++; 784 x[1]++; 785 x[2]++; 786 x[3]++; 787 x[4]++; 788 x[5]++; 789 x[6]++; 790 x[7]++; 791 x[8]++; 792 x[9]++; 793 794 x[do_bad_access ? 100 : 0]++; int res = __LINE__; 795 796 x[10]++; 797 x[11]++; 798 x[12]++; 799 x[13]++; 800 x[14]++; 801 x[15]++; 802 x[16]++; 803 x[17]++; 804 x[18]++; 805 x[19]++; 806 807 delete x; 808 return res; 809} 810 811// Test the we have correct debug info for the failing instruction. 812// This test requires the in-process symbolizer to be enabled by default. 813TEST(AddressSanitizer, DISABLED_LargeFunctionSymbolizeTest) { 814 int failing_line = LargeFunction(false); 815 char expected_warning[128]; 816 sprintf(expected_warning, "LargeFunction.*asan_test.*:%d", failing_line); 817 EXPECT_DEATH(LargeFunction(true), expected_warning); 818} 819 820// Check that we unwind and symbolize correctly. 821TEST(AddressSanitizer, DISABLED_MallocFreeUnwindAndSymbolizeTest) { 822 int *a = (int*)malloc_aaa(sizeof(int)); 823 *a = 1; 824 free_aaa(a); 825 EXPECT_DEATH(*a = 1, "free_ccc.*free_bbb.*free_aaa.*" 826 "malloc_fff.*malloc_eee.*malloc_ddd"); 827} 828 829static bool TryToSetThreadName(const char *name) { 830#if defined(__linux__) && defined(PR_SET_NAME) 831 return 0 == prctl(PR_SET_NAME, (unsigned long)name, 0, 0, 0); 832#else 833 return false; 834#endif 835} 836 837void *ThreadedTestAlloc(void *a) { 838 EXPECT_EQ(true, TryToSetThreadName("AllocThr")); 839 int **p = (int**)a; 840 *p = new int; 841 return 0; 842} 843 844void *ThreadedTestFree(void *a) { 845 EXPECT_EQ(true, TryToSetThreadName("FreeThr")); 846 int **p = (int**)a; 847 delete *p; 848 return 0; 849} 850 851void *ThreadedTestUse(void *a) { 852 EXPECT_EQ(true, TryToSetThreadName("UseThr")); 853 int **p = (int**)a; 854 **p = 1; 855 return 0; 856} 857 858void ThreadedTestSpawn() { 859 pthread_t t; 860 int *x; 861 PTHREAD_CREATE(&t, 0, ThreadedTestAlloc, &x); 862 PTHREAD_JOIN(t, 0); 863 PTHREAD_CREATE(&t, 0, ThreadedTestFree, &x); 864 PTHREAD_JOIN(t, 0); 865 PTHREAD_CREATE(&t, 0, ThreadedTestUse, &x); 866 PTHREAD_JOIN(t, 0); 867} 868 869TEST(AddressSanitizer, ThreadedTest) { 870 EXPECT_DEATH(ThreadedTestSpawn(), 871 ASAN_PCRE_DOTALL 872 "Thread T.*created" 873 ".*Thread T.*created" 874 ".*Thread T.*created"); 875} 876 877void *ThreadedTestFunc(void *unused) { 878 // Check if prctl(PR_SET_NAME) is supported. Return if not. 879 if (!TryToSetThreadName("TestFunc")) 880 return 0; 881 EXPECT_DEATH(ThreadedTestSpawn(), 882 ASAN_PCRE_DOTALL 883 "WRITE .*thread T. .UseThr." 884 ".*freed by thread T. .FreeThr. here:" 885 ".*previously allocated by thread T. .AllocThr. here:" 886 ".*Thread T. .UseThr. created by T.*TestFunc" 887 ".*Thread T. .FreeThr. created by T" 888 ".*Thread T. .AllocThr. created by T" 889 ""); 890 return 0; 891} 892 893TEST(AddressSanitizer, ThreadNamesTest) { 894 // Run ThreadedTestFunc in a separate thread because it tries to set a 895 // thread name and we don't want to change the main thread's name. 896 pthread_t t; 897 PTHREAD_CREATE(&t, 0, ThreadedTestFunc, 0); 898 PTHREAD_JOIN(t, 0); 899} 900 901#if ASAN_NEEDS_SEGV 902TEST(AddressSanitizer, ShadowGapTest) { 903#if SANITIZER_WORDSIZE == 32 904 char *addr = (char*)0x22000000; 905#else 906 char *addr = (char*)0x0000100000080000; 907#endif 908 EXPECT_DEATH(*addr = 1, "AddressSanitizer: SEGV on unknown"); 909} 910#endif // ASAN_NEEDS_SEGV 911 912extern "C" { 913NOINLINE static void UseThenFreeThenUse() { 914 char *x = Ident((char*)malloc(8)); 915 *x = 1; 916 free_aaa(x); 917 *x = 2; 918} 919} 920 921TEST(AddressSanitizer, UseThenFreeThenUseTest) { 922 EXPECT_DEATH(UseThenFreeThenUse(), "freed by thread"); 923} 924 925TEST(AddressSanitizer, StrDupTest) { 926 free(strdup(Ident("123"))); 927} 928 929// Currently we create and poison redzone at right of global variables. 930static char static110[110]; 931const char ConstGlob[7] = {1, 2, 3, 4, 5, 6, 7}; 932static const char StaticConstGlob[3] = {9, 8, 7}; 933 934TEST(AddressSanitizer, GlobalTest) { 935 static char func_static15[15]; 936 937 static char fs1[10]; 938 static char fs2[10]; 939 static char fs3[10]; 940 941 glob5[Ident(0)] = 0; 942 glob5[Ident(1)] = 0; 943 glob5[Ident(2)] = 0; 944 glob5[Ident(3)] = 0; 945 glob5[Ident(4)] = 0; 946 947 EXPECT_DEATH(glob5[Ident(5)] = 0, 948 "0 bytes to the right of global variable.*glob5.* size 5"); 949 EXPECT_DEATH(glob5[Ident(5+6)] = 0, 950 "6 bytes to the right of global variable.*glob5.* size 5"); 951 Ident(static110); // avoid optimizations 952 static110[Ident(0)] = 0; 953 static110[Ident(109)] = 0; 954 EXPECT_DEATH(static110[Ident(110)] = 0, 955 "0 bytes to the right of global variable"); 956 EXPECT_DEATH(static110[Ident(110+7)] = 0, 957 "7 bytes to the right of global variable"); 958 959 Ident(func_static15); // avoid optimizations 960 func_static15[Ident(0)] = 0; 961 EXPECT_DEATH(func_static15[Ident(15)] = 0, 962 "0 bytes to the right of global variable"); 963 EXPECT_DEATH(func_static15[Ident(15 + 9)] = 0, 964 "9 bytes to the right of global variable"); 965 966 Ident(fs1); 967 Ident(fs2); 968 Ident(fs3); 969 970 // We don't create left redzones, so this is not 100% guaranteed to fail. 971 // But most likely will. 972 EXPECT_DEATH(fs2[Ident(-1)] = 0, "is located.*of global variable"); 973 974 EXPECT_DEATH(Ident(Ident(ConstGlob)[8]), 975 "is located 1 bytes to the right of .*ConstGlob"); 976 EXPECT_DEATH(Ident(Ident(StaticConstGlob)[5]), 977 "is located 2 bytes to the right of .*StaticConstGlob"); 978 979 // call stuff from another file. 980 GlobalsTest(0); 981} 982 983TEST(AddressSanitizer, GlobalStringConstTest) { 984 static const char *zoo = "FOOBAR123"; 985 const char *p = Ident(zoo); 986 EXPECT_DEATH(Ident(p[15]), "is ascii string 'FOOBAR123'"); 987} 988 989TEST(AddressSanitizer, FileNameInGlobalReportTest) { 990 static char zoo[10]; 991 const char *p = Ident(zoo); 992 // The file name should be present in the report. 993 EXPECT_DEATH(Ident(p[15]), "zoo.*asan_test."); 994} 995 996int *ReturnsPointerToALocalObject() { 997 int a = 0; 998 return Ident(&a); 999} 1000 1001#if ASAN_UAR == 1 1002TEST(AddressSanitizer, LocalReferenceReturnTest) { 1003 int *(*f)() = Ident(ReturnsPointerToALocalObject); 1004 int *p = f(); 1005 // Call 'f' a few more times, 'p' should still be poisoned. 1006 for (int i = 0; i < 32; i++) 1007 f(); 1008 EXPECT_DEATH(*p = 1, "AddressSanitizer: stack-use-after-return"); 1009 EXPECT_DEATH(*p = 1, "is located.*in frame .*ReturnsPointerToALocal"); 1010} 1011#endif 1012 1013template <int kSize> 1014NOINLINE static void FuncWithStack() { 1015 char x[kSize]; 1016 Ident(x)[0] = 0; 1017 Ident(x)[kSize-1] = 0; 1018} 1019 1020static void LotsOfStackReuse() { 1021 int LargeStack[10000]; 1022 Ident(LargeStack)[0] = 0; 1023 for (int i = 0; i < 10000; i++) { 1024 FuncWithStack<128 * 1>(); 1025 FuncWithStack<128 * 2>(); 1026 FuncWithStack<128 * 4>(); 1027 FuncWithStack<128 * 8>(); 1028 FuncWithStack<128 * 16>(); 1029 FuncWithStack<128 * 32>(); 1030 FuncWithStack<128 * 64>(); 1031 FuncWithStack<128 * 128>(); 1032 FuncWithStack<128 * 256>(); 1033 FuncWithStack<128 * 512>(); 1034 Ident(LargeStack)[0] = 0; 1035 } 1036} 1037 1038TEST(AddressSanitizer, StressStackReuseTest) { 1039 LotsOfStackReuse(); 1040} 1041 1042TEST(AddressSanitizer, ThreadedStressStackReuseTest) { 1043 const int kNumThreads = 20; 1044 pthread_t t[kNumThreads]; 1045 for (int i = 0; i < kNumThreads; i++) { 1046 PTHREAD_CREATE(&t[i], 0, (void* (*)(void *x))LotsOfStackReuse, 0); 1047 } 1048 for (int i = 0; i < kNumThreads; i++) { 1049 PTHREAD_JOIN(t[i], 0); 1050 } 1051} 1052 1053static void *PthreadExit(void *a) { 1054 pthread_exit(0); 1055 return 0; 1056} 1057 1058TEST(AddressSanitizer, PthreadExitTest) { 1059 pthread_t t; 1060 for (int i = 0; i < 1000; i++) { 1061 PTHREAD_CREATE(&t, 0, PthreadExit, 0); 1062 PTHREAD_JOIN(t, 0); 1063 } 1064} 1065 1066#ifdef __EXCEPTIONS 1067NOINLINE static void StackReuseAndException() { 1068 int large_stack[1000]; 1069 Ident(large_stack); 1070 ASAN_THROW(1); 1071} 1072 1073// TODO(kcc): support exceptions with use-after-return. 1074TEST(AddressSanitizer, DISABLED_StressStackReuseAndExceptionsTest) { 1075 for (int i = 0; i < 10000; i++) { 1076 try { 1077 StackReuseAndException(); 1078 } catch(...) { 1079 } 1080 } 1081} 1082#endif 1083 1084TEST(AddressSanitizer, MlockTest) { 1085 EXPECT_EQ(0, mlockall(MCL_CURRENT)); 1086 EXPECT_EQ(0, mlock((void*)0x12345, 0x5678)); 1087 EXPECT_EQ(0, munlockall()); 1088 EXPECT_EQ(0, munlock((void*)0x987, 0x654)); 1089} 1090 1091struct LargeStruct { 1092 int foo[100]; 1093}; 1094 1095// Test for bug http://llvm.org/bugs/show_bug.cgi?id=11763. 1096// Struct copy should not cause asan warning even if lhs == rhs. 1097TEST(AddressSanitizer, LargeStructCopyTest) { 1098 LargeStruct a; 1099 *Ident(&a) = *Ident(&a); 1100} 1101 1102ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS 1103static void NoAddressSafety() { 1104 char *foo = new char[10]; 1105 Ident(foo)[10] = 0; 1106 delete [] foo; 1107} 1108 1109TEST(AddressSanitizer, AttributeNoAddressSafetyTest) { 1110 Ident(NoAddressSafety)(); 1111} 1112 1113// TODO(glider): Enable this test on Mac. 1114// It doesn't work on Android, as calls to new/delete go through malloc/free. 1115#if !defined(__APPLE__) && !defined(ANDROID) && !defined(__ANDROID__) 1116static string MismatchStr(const string &str) { 1117 return string("AddressSanitizer: alloc-dealloc-mismatch \\(") + str; 1118} 1119 1120TEST(AddressSanitizer, AllocDeallocMismatch) { 1121 EXPECT_DEATH(free(Ident(new int)), 1122 MismatchStr("operator new vs free")); 1123 EXPECT_DEATH(free(Ident(new int[2])), 1124 MismatchStr("operator new \\[\\] vs free")); 1125 EXPECT_DEATH(delete (Ident(new int[2])), 1126 MismatchStr("operator new \\[\\] vs operator delete")); 1127 EXPECT_DEATH(delete (Ident((int*)malloc(2 * sizeof(int)))), 1128 MismatchStr("malloc vs operator delete")); 1129 EXPECT_DEATH(delete [] (Ident(new int)), 1130 MismatchStr("operator new vs operator delete \\[\\]")); 1131 EXPECT_DEATH(delete [] (Ident((int*)malloc(2 * sizeof(int)))), 1132 MismatchStr("malloc vs operator delete \\[\\]")); 1133} 1134#endif 1135 1136// ------------------ demo tests; run each one-by-one ------------- 1137// e.g. --gtest_filter=*DemoOOBLeftHigh --gtest_also_run_disabled_tests 1138TEST(AddressSanitizer, DISABLED_DemoThreadedTest) { 1139 ThreadedTestSpawn(); 1140} 1141 1142void *SimpleBugOnSTack(void *x = 0) { 1143 char a[20]; 1144 Ident(a)[20] = 0; 1145 return 0; 1146} 1147 1148TEST(AddressSanitizer, DISABLED_DemoStackTest) { 1149 SimpleBugOnSTack(); 1150} 1151 1152TEST(AddressSanitizer, DISABLED_DemoThreadStackTest) { 1153 pthread_t t; 1154 PTHREAD_CREATE(&t, 0, SimpleBugOnSTack, 0); 1155 PTHREAD_JOIN(t, 0); 1156} 1157 1158TEST(AddressSanitizer, DISABLED_DemoUAFLowIn) { 1159 uaf_test<U1>(10, 0); 1160} 1161TEST(AddressSanitizer, DISABLED_DemoUAFLowLeft) { 1162 uaf_test<U1>(10, -2); 1163} 1164TEST(AddressSanitizer, DISABLED_DemoUAFLowRight) { 1165 uaf_test<U1>(10, 10); 1166} 1167 1168TEST(AddressSanitizer, DISABLED_DemoUAFHigh) { 1169 uaf_test<U1>(kLargeMalloc, 0); 1170} 1171 1172TEST(AddressSanitizer, DISABLED_DemoOOM) { 1173 size_t size = SANITIZER_WORDSIZE == 64 ? (size_t)(1ULL << 40) : (0xf0000000); 1174 printf("%p\n", malloc(size)); 1175} 1176 1177TEST(AddressSanitizer, DISABLED_DemoDoubleFreeTest) { 1178 DoubleFree(); 1179} 1180 1181TEST(AddressSanitizer, DISABLED_DemoNullDerefTest) { 1182 int *a = 0; 1183 Ident(a)[10] = 0; 1184} 1185 1186TEST(AddressSanitizer, DISABLED_DemoFunctionStaticTest) { 1187 static char a[100]; 1188 static char b[100]; 1189 static char c[100]; 1190 Ident(a); 1191 Ident(b); 1192 Ident(c); 1193 Ident(a)[5] = 0; 1194 Ident(b)[105] = 0; 1195 Ident(a)[5] = 0; 1196} 1197 1198TEST(AddressSanitizer, DISABLED_DemoTooMuchMemoryTest) { 1199 const size_t kAllocSize = (1 << 28) - 1024; 1200 size_t total_size = 0; 1201 while (true) { 1202 char *x = (char*)malloc(kAllocSize); 1203 memset(x, 0, kAllocSize); 1204 total_size += kAllocSize; 1205 fprintf(stderr, "total: %ldM %p\n", (long)total_size >> 20, x); 1206 } 1207} 1208 1209// http://code.google.com/p/address-sanitizer/issues/detail?id=66 1210TEST(AddressSanitizer, BufferOverflowAfterManyFrees) { 1211 for (int i = 0; i < 1000000; i++) { 1212 delete [] (Ident(new char [8644])); 1213 } 1214 char *x = new char[8192]; 1215 EXPECT_DEATH(x[Ident(8192)] = 0, "AddressSanitizer: heap-buffer-overflow"); 1216 delete [] Ident(x); 1217} 1218 1219 1220// Test that instrumentation of stack allocations takes into account 1221// AllocSize of a type, and not its StoreSize (16 vs 10 bytes for long double). 1222// See http://llvm.org/bugs/show_bug.cgi?id=12047 for more details. 1223TEST(AddressSanitizer, LongDoubleNegativeTest) { 1224 long double a, b; 1225 static long double c; 1226 memcpy(Ident(&a), Ident(&b), sizeof(long double)); 1227 memcpy(Ident(&c), Ident(&b), sizeof(long double)); 1228} 1229