asan_test.cc revision 8db82e151f4dc3de33530adce370a3d86be54cf9
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 173TEST(AddressSanitizer, UAF_long_double) { 174 if (sizeof(long double) == sizeof(double)) return; 175 long double *p = Ident(new long double[10]); 176 EXPECT_DEATH(Ident(p)[12] = 0, "WRITE of size 10"); 177 EXPECT_DEATH(Ident(p)[0] = Ident(p)[12], "READ of size 10"); 178 delete [] Ident(p); 179} 180 181struct Packed5 { 182 int x; 183 char c; 184} __attribute__((packed)); 185 186 187TEST(AddressSanitizer, UAF_Packed5) { 188 Packed5 *p = Ident(new Packed5[2]); 189 EXPECT_DEATH(p[0] = p[3], "READ of size 5"); 190 EXPECT_DEATH(p[3] = p[0], "WRITE of size 5"); 191 delete [] Ident(p); 192} 193 194#if ASAN_HAS_BLACKLIST 195TEST(AddressSanitizer, IgnoreTest) { 196 int *x = Ident(new int); 197 delete Ident(x); 198 *x = 0; 199} 200#endif // ASAN_HAS_BLACKLIST 201 202struct StructWithBitField { 203 int bf1:1; 204 int bf2:1; 205 int bf3:1; 206 int bf4:29; 207}; 208 209TEST(AddressSanitizer, BitFieldPositiveTest) { 210 StructWithBitField *x = new StructWithBitField; 211 delete Ident(x); 212 EXPECT_DEATH(x->bf1 = 0, "use-after-free"); 213 EXPECT_DEATH(x->bf2 = 0, "use-after-free"); 214 EXPECT_DEATH(x->bf3 = 0, "use-after-free"); 215 EXPECT_DEATH(x->bf4 = 0, "use-after-free"); 216} 217 218struct StructWithBitFields_8_24 { 219 int a:8; 220 int b:24; 221}; 222 223TEST(AddressSanitizer, BitFieldNegativeTest) { 224 StructWithBitFields_8_24 *x = Ident(new StructWithBitFields_8_24); 225 x->a = 0; 226 x->b = 0; 227 delete Ident(x); 228} 229 230TEST(AddressSanitizer, OutOfMemoryTest) { 231 size_t size = SANITIZER_WORDSIZE == 64 ? (size_t)(1ULL << 48) : (0xf0000000); 232 EXPECT_EQ(0, realloc(0, size)); 233 EXPECT_EQ(0, realloc(0, ~Ident(0))); 234 EXPECT_EQ(0, malloc(size)); 235 EXPECT_EQ(0, malloc(~Ident(0))); 236 EXPECT_EQ(0, calloc(1, size)); 237 EXPECT_EQ(0, calloc(1, ~Ident(0))); 238} 239 240#if ASAN_NEEDS_SEGV 241namespace { 242 243const char kUnknownCrash[] = "AddressSanitizer: SEGV on unknown address"; 244const char kOverriddenHandler[] = "ASan signal handler has been overridden\n"; 245 246TEST(AddressSanitizer, WildAddressTest) { 247 char *c = (char*)0x123; 248 EXPECT_DEATH(*c = 0, kUnknownCrash); 249} 250 251void my_sigaction_sighandler(int, siginfo_t*, void*) { 252 fprintf(stderr, kOverriddenHandler); 253 exit(1); 254} 255 256void my_signal_sighandler(int signum) { 257 fprintf(stderr, kOverriddenHandler); 258 exit(1); 259} 260 261TEST(AddressSanitizer, SignalTest) { 262 struct sigaction sigact; 263 memset(&sigact, 0, sizeof(sigact)); 264 sigact.sa_sigaction = my_sigaction_sighandler; 265 sigact.sa_flags = SA_SIGINFO; 266 // ASan should silently ignore sigaction()... 267 EXPECT_EQ(0, sigaction(SIGSEGV, &sigact, 0)); 268#ifdef __APPLE__ 269 EXPECT_EQ(0, sigaction(SIGBUS, &sigact, 0)); 270#endif 271 char *c = (char*)0x123; 272 EXPECT_DEATH(*c = 0, kUnknownCrash); 273 // ... and signal(). 274 EXPECT_EQ(0, signal(SIGSEGV, my_signal_sighandler)); 275 EXPECT_DEATH(*c = 0, kUnknownCrash); 276} 277} // namespace 278#endif 279 280static void TestLargeMalloc(size_t size) { 281 char buff[1024]; 282 sprintf(buff, "is located 1 bytes to the left of %lu-byte", (long)size); 283 EXPECT_DEATH(Ident((char*)malloc(size))[-1] = 0, buff); 284} 285 286TEST(AddressSanitizer, LargeMallocTest) { 287 const int max_size = (SANITIZER_WORDSIZE == 32) ? 1 << 26 : 1 << 28; 288 for (int i = 113; i < max_size; i = i * 2 + 13) { 289 TestLargeMalloc(i); 290 } 291} 292 293TEST(AddressSanitizer, HugeMallocTest) { 294 if (SANITIZER_WORDSIZE != 64) return; 295 size_t n_megs = 4100; 296 TestLargeMalloc(n_megs << 20); 297} 298 299#ifndef __APPLE__ 300void MemalignRun(size_t align, size_t size, int idx) { 301 char *p = (char *)memalign(align, size); 302 Ident(p)[idx] = 0; 303 free(p); 304} 305 306TEST(AddressSanitizer, memalign) { 307 for (int align = 16; align <= (1 << 23); align *= 2) { 308 size_t size = align * 5; 309 EXPECT_DEATH(MemalignRun(align, size, -1), 310 "is located 1 bytes to the left"); 311 EXPECT_DEATH(MemalignRun(align, size, size + 1), 312 "is located 1 bytes to the right"); 313 } 314} 315#endif 316 317void *ManyThreadsWorker(void *a) { 318 for (int iter = 0; iter < 100; iter++) { 319 for (size_t size = 100; size < 2000; size *= 2) { 320 free(Ident(malloc(size))); 321 } 322 } 323 return 0; 324} 325 326TEST(AddressSanitizer, ManyThreadsTest) { 327 const size_t kNumThreads = 328 (SANITIZER_WORDSIZE == 32 || ASAN_AVOID_EXPENSIVE_TESTS) ? 30 : 1000; 329 pthread_t t[kNumThreads]; 330 for (size_t i = 0; i < kNumThreads; i++) { 331 PTHREAD_CREATE(&t[i], 0, ManyThreadsWorker, (void*)i); 332 } 333 for (size_t i = 0; i < kNumThreads; i++) { 334 PTHREAD_JOIN(t[i], 0); 335 } 336} 337 338TEST(AddressSanitizer, ReallocTest) { 339 const int kMinElem = 5; 340 int *ptr = (int*)malloc(sizeof(int) * kMinElem); 341 ptr[3] = 3; 342 for (int i = 0; i < 10000; i++) { 343 ptr = (int*)realloc(ptr, 344 (my_rand() % 1000 + kMinElem) * sizeof(int)); 345 EXPECT_EQ(3, ptr[3]); 346 } 347 free(ptr); 348 // Realloc pointer returned by malloc(0). 349 int *ptr2 = Ident((int*)malloc(0)); 350 ptr2 = Ident((int*)realloc(ptr2, sizeof(*ptr2))); 351 *ptr2 = 42; 352 EXPECT_EQ(42, *ptr2); 353 free(ptr2); 354} 355 356TEST(AddressSanitizer, ZeroSizeMallocTest) { 357 // Test that malloc(0) and similar functions don't return NULL. 358 void *ptr = Ident(malloc(0)); 359 EXPECT_TRUE(NULL != ptr); 360 free(ptr); 361#if !defined(__APPLE__) && !defined(ANDROID) && !defined(__ANDROID__) 362 int pm_res = posix_memalign(&ptr, 1<<20, 0); 363 EXPECT_EQ(0, pm_res); 364 EXPECT_TRUE(NULL != ptr); 365 free(ptr); 366#endif 367 int *int_ptr = new int[0]; 368 int *int_ptr2 = new int[0]; 369 EXPECT_TRUE(NULL != int_ptr); 370 EXPECT_TRUE(NULL != int_ptr2); 371 EXPECT_NE(int_ptr, int_ptr2); 372 delete[] int_ptr; 373 delete[] int_ptr2; 374} 375 376#ifndef __APPLE__ 377static const char *kMallocUsableSizeErrorMsg = 378 "AddressSanitizer: attempting to call malloc_usable_size()"; 379 380TEST(AddressSanitizer, MallocUsableSizeTest) { 381 const size_t kArraySize = 100; 382 char *array = Ident((char*)malloc(kArraySize)); 383 int *int_ptr = Ident(new int); 384 EXPECT_EQ(0U, malloc_usable_size(NULL)); 385 EXPECT_EQ(kArraySize, malloc_usable_size(array)); 386 EXPECT_EQ(sizeof(int), malloc_usable_size(int_ptr)); 387 EXPECT_DEATH(malloc_usable_size((void*)0x123), kMallocUsableSizeErrorMsg); 388 EXPECT_DEATH(malloc_usable_size(array + kArraySize / 2), 389 kMallocUsableSizeErrorMsg); 390 free(array); 391 EXPECT_DEATH(malloc_usable_size(array), kMallocUsableSizeErrorMsg); 392} 393#endif 394 395void WrongFree() { 396 int *x = (int*)malloc(100 * sizeof(int)); 397 // Use the allocated memory, otherwise Clang will optimize it out. 398 Ident(x); 399 free(x + 1); 400} 401 402TEST(AddressSanitizer, WrongFreeTest) { 403 EXPECT_DEATH(WrongFree(), ASAN_PCRE_DOTALL 404 "ERROR: AddressSanitizer: attempting free.*not malloc" 405 ".*is located 4 bytes inside of 400-byte region" 406 ".*allocated by thread"); 407} 408 409void DoubleFree() { 410 int *x = (int*)malloc(100 * sizeof(int)); 411 fprintf(stderr, "DoubleFree: x=%p\n", x); 412 free(x); 413 free(x); 414 fprintf(stderr, "should have failed in the second free(%p)\n", x); 415 abort(); 416} 417 418TEST(AddressSanitizer, DoubleFreeTest) { 419 EXPECT_DEATH(DoubleFree(), ASAN_PCRE_DOTALL 420 "ERROR: AddressSanitizer: attempting double-free" 421 ".*is located 0 bytes inside of 400-byte region" 422 ".*freed by thread T0 here" 423 ".*previously allocated by thread T0 here"); 424} 425 426template<int kSize> 427NOINLINE void SizedStackTest() { 428 char a[kSize]; 429 char *A = Ident((char*)&a); 430 for (size_t i = 0; i < kSize; i++) 431 A[i] = i; 432 EXPECT_DEATH(A[-1] = 0, ""); 433 EXPECT_DEATH(A[-20] = 0, ""); 434 EXPECT_DEATH(A[-31] = 0, ""); 435 EXPECT_DEATH(A[kSize] = 0, ""); 436 EXPECT_DEATH(A[kSize + 1] = 0, ""); 437 EXPECT_DEATH(A[kSize + 10] = 0, ""); 438 EXPECT_DEATH(A[kSize + 31] = 0, ""); 439} 440 441TEST(AddressSanitizer, SimpleStackTest) { 442 SizedStackTest<1>(); 443 SizedStackTest<2>(); 444 SizedStackTest<3>(); 445 SizedStackTest<4>(); 446 SizedStackTest<5>(); 447 SizedStackTest<6>(); 448 SizedStackTest<7>(); 449 SizedStackTest<16>(); 450 SizedStackTest<25>(); 451 SizedStackTest<34>(); 452 SizedStackTest<43>(); 453 SizedStackTest<51>(); 454 SizedStackTest<62>(); 455 SizedStackTest<64>(); 456 SizedStackTest<128>(); 457} 458 459TEST(AddressSanitizer, ManyStackObjectsTest) { 460 char XXX[10]; 461 char YYY[20]; 462 char ZZZ[30]; 463 Ident(XXX); 464 Ident(YYY); 465 EXPECT_DEATH(Ident(ZZZ)[-1] = 0, ASAN_PCRE_DOTALL "XXX.*YYY.*ZZZ"); 466} 467 468#if 0 // This test requires online symbolizer. 469// Moved to lit_tests/stack-oob-frames.cc. 470// Reenable here once we have online symbolizer by default. 471NOINLINE static void Frame0(int frame, char *a, char *b, char *c) { 472 char d[4] = {0}; 473 char *D = Ident(d); 474 switch (frame) { 475 case 3: a[5]++; break; 476 case 2: b[5]++; break; 477 case 1: c[5]++; break; 478 case 0: D[5]++; break; 479 } 480} 481NOINLINE static void Frame1(int frame, char *a, char *b) { 482 char c[4] = {0}; Frame0(frame, a, b, c); 483 break_optimization(0); 484} 485NOINLINE static void Frame2(int frame, char *a) { 486 char b[4] = {0}; Frame1(frame, a, b); 487 break_optimization(0); 488} 489NOINLINE static void Frame3(int frame) { 490 char a[4] = {0}; Frame2(frame, a); 491 break_optimization(0); 492} 493 494TEST(AddressSanitizer, GuiltyStackFrame0Test) { 495 EXPECT_DEATH(Frame3(0), "located .*in frame <.*Frame0"); 496} 497TEST(AddressSanitizer, GuiltyStackFrame1Test) { 498 EXPECT_DEATH(Frame3(1), "located .*in frame <.*Frame1"); 499} 500TEST(AddressSanitizer, GuiltyStackFrame2Test) { 501 EXPECT_DEATH(Frame3(2), "located .*in frame <.*Frame2"); 502} 503TEST(AddressSanitizer, GuiltyStackFrame3Test) { 504 EXPECT_DEATH(Frame3(3), "located .*in frame <.*Frame3"); 505} 506#endif 507 508NOINLINE void LongJmpFunc1(jmp_buf buf) { 509 // create three red zones for these two stack objects. 510 int a; 511 int b; 512 513 int *A = Ident(&a); 514 int *B = Ident(&b); 515 *A = *B; 516 longjmp(buf, 1); 517} 518 519NOINLINE void BuiltinLongJmpFunc1(jmp_buf buf) { 520 // create three red zones for these two stack objects. 521 int a; 522 int b; 523 524 int *A = Ident(&a); 525 int *B = Ident(&b); 526 *A = *B; 527 __builtin_longjmp((void**)buf, 1); 528} 529 530NOINLINE void UnderscopeLongJmpFunc1(jmp_buf buf) { 531 // create three red zones for these two stack objects. 532 int a; 533 int b; 534 535 int *A = Ident(&a); 536 int *B = Ident(&b); 537 *A = *B; 538 _longjmp(buf, 1); 539} 540 541NOINLINE void SigLongJmpFunc1(sigjmp_buf buf) { 542 // create three red zones for these two stack objects. 543 int a; 544 int b; 545 546 int *A = Ident(&a); 547 int *B = Ident(&b); 548 *A = *B; 549 siglongjmp(buf, 1); 550} 551 552 553NOINLINE void TouchStackFunc() { 554 int a[100]; // long array will intersect with redzones from LongJmpFunc1. 555 int *A = Ident(a); 556 for (int i = 0; i < 100; i++) 557 A[i] = i*i; 558} 559 560// Test that we handle longjmp and do not report fals positives on stack. 561TEST(AddressSanitizer, LongJmpTest) { 562 static jmp_buf buf; 563 if (!setjmp(buf)) { 564 LongJmpFunc1(buf); 565 } else { 566 TouchStackFunc(); 567 } 568} 569 570#if not defined(__ANDROID__) 571TEST(AddressSanitizer, BuiltinLongJmpTest) { 572 static jmp_buf buf; 573 if (!__builtin_setjmp((void**)buf)) { 574 BuiltinLongJmpFunc1(buf); 575 } else { 576 TouchStackFunc(); 577 } 578} 579#endif // not defined(__ANDROID__) 580 581TEST(AddressSanitizer, UnderscopeLongJmpTest) { 582 static jmp_buf buf; 583 if (!_setjmp(buf)) { 584 UnderscopeLongJmpFunc1(buf); 585 } else { 586 TouchStackFunc(); 587 } 588} 589 590TEST(AddressSanitizer, SigLongJmpTest) { 591 static sigjmp_buf buf; 592 if (!sigsetjmp(buf, 1)) { 593 SigLongJmpFunc1(buf); 594 } else { 595 TouchStackFunc(); 596 } 597} 598 599#ifdef __EXCEPTIONS 600NOINLINE void ThrowFunc() { 601 // create three red zones for these two stack objects. 602 int a; 603 int b; 604 605 int *A = Ident(&a); 606 int *B = Ident(&b); 607 *A = *B; 608 ASAN_THROW(1); 609} 610 611TEST(AddressSanitizer, CxxExceptionTest) { 612 if (ASAN_UAR) return; 613 // TODO(kcc): this test crashes on 32-bit for some reason... 614 if (SANITIZER_WORDSIZE == 32) return; 615 try { 616 ThrowFunc(); 617 } catch(...) {} 618 TouchStackFunc(); 619} 620#endif 621 622void *ThreadStackReuseFunc1(void *unused) { 623 // create three red zones for these two stack objects. 624 int a; 625 int b; 626 627 int *A = Ident(&a); 628 int *B = Ident(&b); 629 *A = *B; 630 pthread_exit(0); 631 return 0; 632} 633 634void *ThreadStackReuseFunc2(void *unused) { 635 TouchStackFunc(); 636 return 0; 637} 638 639TEST(AddressSanitizer, ThreadStackReuseTest) { 640 pthread_t t; 641 PTHREAD_CREATE(&t, 0, ThreadStackReuseFunc1, 0); 642 PTHREAD_JOIN(t, 0); 643 PTHREAD_CREATE(&t, 0, ThreadStackReuseFunc2, 0); 644 PTHREAD_JOIN(t, 0); 645} 646 647#if defined(__i386__) || defined(__x86_64__) 648TEST(AddressSanitizer, Store128Test) { 649 char *a = Ident((char*)malloc(Ident(12))); 650 char *p = a; 651 if (((uintptr_t)a % 16) != 0) 652 p = a + 8; 653 assert(((uintptr_t)p % 16) == 0); 654 __m128i value_wide = _mm_set1_epi16(0x1234); 655 EXPECT_DEATH(_mm_store_si128((__m128i*)p, value_wide), 656 "AddressSanitizer: heap-buffer-overflow"); 657 EXPECT_DEATH(_mm_store_si128((__m128i*)p, value_wide), 658 "WRITE of size 16"); 659 EXPECT_DEATH(_mm_store_si128((__m128i*)p, value_wide), 660 "located 0 bytes to the right of 12-byte"); 661 free(a); 662} 663#endif 664 665string RightOOBErrorMessage(int oob_distance, bool is_write) { 666 assert(oob_distance >= 0); 667 char expected_str[100]; 668 sprintf(expected_str, ASAN_PCRE_DOTALL 669 "buffer-overflow.*%s.*located %d bytes to the right", 670 is_write ? "WRITE" : "READ", oob_distance); 671 return string(expected_str); 672} 673 674string RightOOBWriteMessage(int oob_distance) { 675 return RightOOBErrorMessage(oob_distance, /*is_write*/true); 676} 677 678string RightOOBReadMessage(int oob_distance) { 679 return RightOOBErrorMessage(oob_distance, /*is_write*/false); 680} 681 682string LeftOOBErrorMessage(int oob_distance, bool is_write) { 683 assert(oob_distance > 0); 684 char expected_str[100]; 685 sprintf(expected_str, ASAN_PCRE_DOTALL "%s.*located %d bytes to the left", 686 is_write ? "WRITE" : "READ", oob_distance); 687 return string(expected_str); 688} 689 690string LeftOOBWriteMessage(int oob_distance) { 691 return LeftOOBErrorMessage(oob_distance, /*is_write*/true); 692} 693 694string LeftOOBReadMessage(int oob_distance) { 695 return LeftOOBErrorMessage(oob_distance, /*is_write*/false); 696} 697 698string LeftOOBAccessMessage(int oob_distance) { 699 assert(oob_distance > 0); 700 char expected_str[100]; 701 sprintf(expected_str, "located %d bytes to the left", oob_distance); 702 return string(expected_str); 703} 704 705char* MallocAndMemsetString(size_t size, char ch) { 706 char *s = Ident((char*)malloc(size)); 707 memset(s, ch, size); 708 return s; 709} 710 711char* MallocAndMemsetString(size_t size) { 712 return MallocAndMemsetString(size, 'z'); 713} 714 715#if defined(__linux__) && !defined(ANDROID) && !defined(__ANDROID__) 716#define READ_TEST(READ_N_BYTES) \ 717 char *x = new char[10]; \ 718 int fd = open("/proc/self/stat", O_RDONLY); \ 719 ASSERT_GT(fd, 0); \ 720 EXPECT_DEATH(READ_N_BYTES, \ 721 ASAN_PCRE_DOTALL \ 722 "AddressSanitizer: heap-buffer-overflow" \ 723 ".* is located 0 bytes to the right of 10-byte region"); \ 724 close(fd); \ 725 delete [] x; \ 726 727TEST(AddressSanitizer, pread) { 728 READ_TEST(pread(fd, x, 15, 0)); 729} 730 731TEST(AddressSanitizer, pread64) { 732 READ_TEST(pread64(fd, x, 15, 0)); 733} 734 735TEST(AddressSanitizer, read) { 736 READ_TEST(read(fd, x, 15)); 737} 738#endif // defined(__linux__) && !defined(ANDROID) && !defined(__ANDROID__) 739 740// This test case fails 741// Clang optimizes memcpy/memset calls which lead to unaligned access 742TEST(AddressSanitizer, DISABLED_MemIntrinsicUnalignedAccessTest) { 743 int size = Ident(4096); 744 char *s = Ident((char*)malloc(size)); 745 EXPECT_DEATH(memset(s + size - 1, 0, 2), RightOOBWriteMessage(0)); 746 free(s); 747} 748 749// TODO(samsonov): Add a test with malloc(0) 750// TODO(samsonov): Add tests for str* and mem* functions. 751 752NOINLINE static int LargeFunction(bool do_bad_access) { 753 int *x = new int[100]; 754 x[0]++; 755 x[1]++; 756 x[2]++; 757 x[3]++; 758 x[4]++; 759 x[5]++; 760 x[6]++; 761 x[7]++; 762 x[8]++; 763 x[9]++; 764 765 x[do_bad_access ? 100 : 0]++; int res = __LINE__; 766 767 x[10]++; 768 x[11]++; 769 x[12]++; 770 x[13]++; 771 x[14]++; 772 x[15]++; 773 x[16]++; 774 x[17]++; 775 x[18]++; 776 x[19]++; 777 778 delete x; 779 return res; 780} 781 782// Test the we have correct debug info for the failing instruction. 783// This test requires the in-process symbolizer to be enabled by default. 784TEST(AddressSanitizer, DISABLED_LargeFunctionSymbolizeTest) { 785 int failing_line = LargeFunction(false); 786 char expected_warning[128]; 787 sprintf(expected_warning, "LargeFunction.*asan_test.*:%d", failing_line); 788 EXPECT_DEATH(LargeFunction(true), expected_warning); 789} 790 791// Check that we unwind and symbolize correctly. 792TEST(AddressSanitizer, DISABLED_MallocFreeUnwindAndSymbolizeTest) { 793 int *a = (int*)malloc_aaa(sizeof(int)); 794 *a = 1; 795 free_aaa(a); 796 EXPECT_DEATH(*a = 1, "free_ccc.*free_bbb.*free_aaa.*" 797 "malloc_fff.*malloc_eee.*malloc_ddd"); 798} 799 800static bool TryToSetThreadName(const char *name) { 801#if defined(__linux__) && defined(PR_SET_NAME) 802 return 0 == prctl(PR_SET_NAME, (unsigned long)name, 0, 0, 0); 803#else 804 return false; 805#endif 806} 807 808void *ThreadedTestAlloc(void *a) { 809 EXPECT_EQ(true, TryToSetThreadName("AllocThr")); 810 int **p = (int**)a; 811 *p = new int; 812 return 0; 813} 814 815void *ThreadedTestFree(void *a) { 816 EXPECT_EQ(true, TryToSetThreadName("FreeThr")); 817 int **p = (int**)a; 818 delete *p; 819 return 0; 820} 821 822void *ThreadedTestUse(void *a) { 823 EXPECT_EQ(true, TryToSetThreadName("UseThr")); 824 int **p = (int**)a; 825 **p = 1; 826 return 0; 827} 828 829void ThreadedTestSpawn() { 830 pthread_t t; 831 int *x; 832 PTHREAD_CREATE(&t, 0, ThreadedTestAlloc, &x); 833 PTHREAD_JOIN(t, 0); 834 PTHREAD_CREATE(&t, 0, ThreadedTestFree, &x); 835 PTHREAD_JOIN(t, 0); 836 PTHREAD_CREATE(&t, 0, ThreadedTestUse, &x); 837 PTHREAD_JOIN(t, 0); 838} 839 840TEST(AddressSanitizer, ThreadedTest) { 841 EXPECT_DEATH(ThreadedTestSpawn(), 842 ASAN_PCRE_DOTALL 843 "Thread T.*created" 844 ".*Thread T.*created" 845 ".*Thread T.*created"); 846} 847 848void *ThreadedTestFunc(void *unused) { 849 // Check if prctl(PR_SET_NAME) is supported. Return if not. 850 if (!TryToSetThreadName("TestFunc")) 851 return 0; 852 EXPECT_DEATH(ThreadedTestSpawn(), 853 ASAN_PCRE_DOTALL 854 "WRITE .*thread T. .UseThr." 855 ".*freed by thread T. .FreeThr. here:" 856 ".*previously allocated by thread T. .AllocThr. here:" 857 ".*Thread T. .UseThr. created by T.*TestFunc" 858 ".*Thread T. .FreeThr. created by T" 859 ".*Thread T. .AllocThr. created by T" 860 ""); 861 return 0; 862} 863 864TEST(AddressSanitizer, ThreadNamesTest) { 865 // Run ThreadedTestFunc in a separate thread because it tries to set a 866 // thread name and we don't want to change the main thread's name. 867 pthread_t t; 868 PTHREAD_CREATE(&t, 0, ThreadedTestFunc, 0); 869 PTHREAD_JOIN(t, 0); 870} 871 872#if ASAN_NEEDS_SEGV 873TEST(AddressSanitizer, ShadowGapTest) { 874#if SANITIZER_WORDSIZE == 32 875 char *addr = (char*)0x22000000; 876#else 877 char *addr = (char*)0x0000100000080000; 878#endif 879 EXPECT_DEATH(*addr = 1, "AddressSanitizer: SEGV on unknown"); 880} 881#endif // ASAN_NEEDS_SEGV 882 883extern "C" { 884NOINLINE static void UseThenFreeThenUse() { 885 char *x = Ident((char*)malloc(8)); 886 *x = 1; 887 free_aaa(x); 888 *x = 2; 889} 890} 891 892TEST(AddressSanitizer, UseThenFreeThenUseTest) { 893 EXPECT_DEATH(UseThenFreeThenUse(), "freed by thread"); 894} 895 896TEST(AddressSanitizer, StrDupTest) { 897 free(strdup(Ident("123"))); 898} 899 900// Currently we create and poison redzone at right of global variables. 901static char static110[110]; 902const char ConstGlob[7] = {1, 2, 3, 4, 5, 6, 7}; 903static const char StaticConstGlob[3] = {9, 8, 7}; 904 905TEST(AddressSanitizer, GlobalTest) { 906 static char func_static15[15]; 907 908 static char fs1[10]; 909 static char fs2[10]; 910 static char fs3[10]; 911 912 glob5[Ident(0)] = 0; 913 glob5[Ident(1)] = 0; 914 glob5[Ident(2)] = 0; 915 glob5[Ident(3)] = 0; 916 glob5[Ident(4)] = 0; 917 918 EXPECT_DEATH(glob5[Ident(5)] = 0, 919 "0 bytes to the right of global variable.*glob5.* size 5"); 920 EXPECT_DEATH(glob5[Ident(5+6)] = 0, 921 "6 bytes to the right of global variable.*glob5.* size 5"); 922 Ident(static110); // avoid optimizations 923 static110[Ident(0)] = 0; 924 static110[Ident(109)] = 0; 925 EXPECT_DEATH(static110[Ident(110)] = 0, 926 "0 bytes to the right of global variable"); 927 EXPECT_DEATH(static110[Ident(110+7)] = 0, 928 "7 bytes to the right of global variable"); 929 930 Ident(func_static15); // avoid optimizations 931 func_static15[Ident(0)] = 0; 932 EXPECT_DEATH(func_static15[Ident(15)] = 0, 933 "0 bytes to the right of global variable"); 934 EXPECT_DEATH(func_static15[Ident(15 + 9)] = 0, 935 "9 bytes to the right of global variable"); 936 937 Ident(fs1); 938 Ident(fs2); 939 Ident(fs3); 940 941 // We don't create left redzones, so this is not 100% guaranteed to fail. 942 // But most likely will. 943 EXPECT_DEATH(fs2[Ident(-1)] = 0, "is located.*of global variable"); 944 945 EXPECT_DEATH(Ident(Ident(ConstGlob)[8]), 946 "is located 1 bytes to the right of .*ConstGlob"); 947 EXPECT_DEATH(Ident(Ident(StaticConstGlob)[5]), 948 "is located 2 bytes to the right of .*StaticConstGlob"); 949 950 // call stuff from another file. 951 GlobalsTest(0); 952} 953 954TEST(AddressSanitizer, GlobalStringConstTest) { 955 static const char *zoo = "FOOBAR123"; 956 const char *p = Ident(zoo); 957 EXPECT_DEATH(Ident(p[15]), "is ascii string 'FOOBAR123'"); 958} 959 960TEST(AddressSanitizer, FileNameInGlobalReportTest) { 961 static char zoo[10]; 962 const char *p = Ident(zoo); 963 // The file name should be present in the report. 964 EXPECT_DEATH(Ident(p[15]), "zoo.*asan_test."); 965} 966 967int *ReturnsPointerToALocalObject() { 968 int a = 0; 969 return Ident(&a); 970} 971 972#if ASAN_UAR == 1 973TEST(AddressSanitizer, LocalReferenceReturnTest) { 974 int *(*f)() = Ident(ReturnsPointerToALocalObject); 975 int *p = f(); 976 // Call 'f' a few more times, 'p' should still be poisoned. 977 for (int i = 0; i < 32; i++) 978 f(); 979 EXPECT_DEATH(*p = 1, "AddressSanitizer: stack-use-after-return"); 980 EXPECT_DEATH(*p = 1, "is located.*in frame .*ReturnsPointerToALocal"); 981} 982#endif 983 984template <int kSize> 985NOINLINE static void FuncWithStack() { 986 char x[kSize]; 987 Ident(x)[0] = 0; 988 Ident(x)[kSize-1] = 0; 989} 990 991static void LotsOfStackReuse() { 992 int LargeStack[10000]; 993 Ident(LargeStack)[0] = 0; 994 for (int i = 0; i < 10000; i++) { 995 FuncWithStack<128 * 1>(); 996 FuncWithStack<128 * 2>(); 997 FuncWithStack<128 * 4>(); 998 FuncWithStack<128 * 8>(); 999 FuncWithStack<128 * 16>(); 1000 FuncWithStack<128 * 32>(); 1001 FuncWithStack<128 * 64>(); 1002 FuncWithStack<128 * 128>(); 1003 FuncWithStack<128 * 256>(); 1004 FuncWithStack<128 * 512>(); 1005 Ident(LargeStack)[0] = 0; 1006 } 1007} 1008 1009TEST(AddressSanitizer, StressStackReuseTest) { 1010 LotsOfStackReuse(); 1011} 1012 1013TEST(AddressSanitizer, ThreadedStressStackReuseTest) { 1014 const int kNumThreads = 20; 1015 pthread_t t[kNumThreads]; 1016 for (int i = 0; i < kNumThreads; i++) { 1017 PTHREAD_CREATE(&t[i], 0, (void* (*)(void *x))LotsOfStackReuse, 0); 1018 } 1019 for (int i = 0; i < kNumThreads; i++) { 1020 PTHREAD_JOIN(t[i], 0); 1021 } 1022} 1023 1024static void *PthreadExit(void *a) { 1025 pthread_exit(0); 1026 return 0; 1027} 1028 1029TEST(AddressSanitizer, PthreadExitTest) { 1030 pthread_t t; 1031 for (int i = 0; i < 1000; i++) { 1032 PTHREAD_CREATE(&t, 0, PthreadExit, 0); 1033 PTHREAD_JOIN(t, 0); 1034 } 1035} 1036 1037#ifdef __EXCEPTIONS 1038NOINLINE static void StackReuseAndException() { 1039 int large_stack[1000]; 1040 Ident(large_stack); 1041 ASAN_THROW(1); 1042} 1043 1044// TODO(kcc): support exceptions with use-after-return. 1045TEST(AddressSanitizer, DISABLED_StressStackReuseAndExceptionsTest) { 1046 for (int i = 0; i < 10000; i++) { 1047 try { 1048 StackReuseAndException(); 1049 } catch(...) { 1050 } 1051 } 1052} 1053#endif 1054 1055TEST(AddressSanitizer, MlockTest) { 1056 EXPECT_EQ(0, mlockall(MCL_CURRENT)); 1057 EXPECT_EQ(0, mlock((void*)0x12345, 0x5678)); 1058 EXPECT_EQ(0, munlockall()); 1059 EXPECT_EQ(0, munlock((void*)0x987, 0x654)); 1060} 1061 1062struct LargeStruct { 1063 int foo[100]; 1064}; 1065 1066// Test for bug http://llvm.org/bugs/show_bug.cgi?id=11763. 1067// Struct copy should not cause asan warning even if lhs == rhs. 1068TEST(AddressSanitizer, LargeStructCopyTest) { 1069 LargeStruct a; 1070 *Ident(&a) = *Ident(&a); 1071} 1072 1073ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS 1074static void NoAddressSafety() { 1075 char *foo = new char[10]; 1076 Ident(foo)[10] = 0; 1077 delete [] foo; 1078} 1079 1080TEST(AddressSanitizer, AttributeNoAddressSafetyTest) { 1081 Ident(NoAddressSafety)(); 1082} 1083 1084// It doesn't work on Android, as calls to new/delete go through malloc/free. 1085// Neither it does on OS X, see 1086// https://code.google.com/p/address-sanitizer/issues/detail?id=131. 1087#if !defined(ANDROID) && !defined(__ANDROID__) && !defined(__APPLE__) 1088static string MismatchStr(const string &str) { 1089 return string("AddressSanitizer: alloc-dealloc-mismatch \\(") + str; 1090} 1091 1092TEST(AddressSanitizer, AllocDeallocMismatch) { 1093 EXPECT_DEATH(free(Ident(new int)), 1094 MismatchStr("operator new vs free")); 1095 EXPECT_DEATH(free(Ident(new int[2])), 1096 MismatchStr("operator new \\[\\] vs free")); 1097 EXPECT_DEATH(delete (Ident(new int[2])), 1098 MismatchStr("operator new \\[\\] vs operator delete")); 1099 EXPECT_DEATH(delete (Ident((int*)malloc(2 * sizeof(int)))), 1100 MismatchStr("malloc vs operator delete")); 1101 EXPECT_DEATH(delete [] (Ident(new int)), 1102 MismatchStr("operator new vs operator delete \\[\\]")); 1103 EXPECT_DEATH(delete [] (Ident((int*)malloc(2 * sizeof(int)))), 1104 MismatchStr("malloc vs operator delete \\[\\]")); 1105} 1106#endif 1107 1108// ------------------ demo tests; run each one-by-one ------------- 1109// e.g. --gtest_filter=*DemoOOBLeftHigh --gtest_also_run_disabled_tests 1110TEST(AddressSanitizer, DISABLED_DemoThreadedTest) { 1111 ThreadedTestSpawn(); 1112} 1113 1114void *SimpleBugOnSTack(void *x = 0) { 1115 char a[20]; 1116 Ident(a)[20] = 0; 1117 return 0; 1118} 1119 1120TEST(AddressSanitizer, DISABLED_DemoStackTest) { 1121 SimpleBugOnSTack(); 1122} 1123 1124TEST(AddressSanitizer, DISABLED_DemoThreadStackTest) { 1125 pthread_t t; 1126 PTHREAD_CREATE(&t, 0, SimpleBugOnSTack, 0); 1127 PTHREAD_JOIN(t, 0); 1128} 1129 1130TEST(AddressSanitizer, DISABLED_DemoUAFLowIn) { 1131 uaf_test<U1>(10, 0); 1132} 1133TEST(AddressSanitizer, DISABLED_DemoUAFLowLeft) { 1134 uaf_test<U1>(10, -2); 1135} 1136TEST(AddressSanitizer, DISABLED_DemoUAFLowRight) { 1137 uaf_test<U1>(10, 10); 1138} 1139 1140TEST(AddressSanitizer, DISABLED_DemoUAFHigh) { 1141 uaf_test<U1>(kLargeMalloc, 0); 1142} 1143 1144TEST(AddressSanitizer, DISABLED_DemoOOM) { 1145 size_t size = SANITIZER_WORDSIZE == 64 ? (size_t)(1ULL << 40) : (0xf0000000); 1146 printf("%p\n", malloc(size)); 1147} 1148 1149TEST(AddressSanitizer, DISABLED_DemoDoubleFreeTest) { 1150 DoubleFree(); 1151} 1152 1153TEST(AddressSanitizer, DISABLED_DemoNullDerefTest) { 1154 int *a = 0; 1155 Ident(a)[10] = 0; 1156} 1157 1158TEST(AddressSanitizer, DISABLED_DemoFunctionStaticTest) { 1159 static char a[100]; 1160 static char b[100]; 1161 static char c[100]; 1162 Ident(a); 1163 Ident(b); 1164 Ident(c); 1165 Ident(a)[5] = 0; 1166 Ident(b)[105] = 0; 1167 Ident(a)[5] = 0; 1168} 1169 1170TEST(AddressSanitizer, DISABLED_DemoTooMuchMemoryTest) { 1171 const size_t kAllocSize = (1 << 28) - 1024; 1172 size_t total_size = 0; 1173 while (true) { 1174 char *x = (char*)malloc(kAllocSize); 1175 memset(x, 0, kAllocSize); 1176 total_size += kAllocSize; 1177 fprintf(stderr, "total: %ldM %p\n", (long)total_size >> 20, x); 1178 } 1179} 1180 1181// http://code.google.com/p/address-sanitizer/issues/detail?id=66 1182TEST(AddressSanitizer, BufferOverflowAfterManyFrees) { 1183 for (int i = 0; i < 1000000; i++) { 1184 delete [] (Ident(new char [8644])); 1185 } 1186 char *x = new char[8192]; 1187 EXPECT_DEATH(x[Ident(8192)] = 0, "AddressSanitizer: heap-buffer-overflow"); 1188 delete [] Ident(x); 1189} 1190 1191 1192// Test that instrumentation of stack allocations takes into account 1193// AllocSize of a type, and not its StoreSize (16 vs 10 bytes for long double). 1194// See http://llvm.org/bugs/show_bug.cgi?id=12047 for more details. 1195TEST(AddressSanitizer, LongDoubleNegativeTest) { 1196 long double a, b; 1197 static long double c; 1198 memcpy(Ident(&a), Ident(&b), sizeof(long double)); 1199 memcpy(Ident(&c), Ident(&b), sizeof(long double)); 1200} 1201