asan_test.cc revision 63201b127e21d6fbfb6de62d0e44a5de01288153
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 <stdio.h> 14#include <signal.h> 15#include <stdlib.h> 16#include <string.h> 17#include <strings.h> 18#include <pthread.h> 19#include <stdint.h> 20#include <setjmp.h> 21#include <assert.h> 22 23#if defined(__i386__) || defined(__x86_64__) 24#include <emmintrin.h> 25#endif 26 27#include "asan_test_config.h" 28#include "asan_test_utils.h" 29 30#ifndef __APPLE__ 31#include <malloc.h> 32#else 33#include <AvailabilityMacros.h> // For MAC_OS_X_VERSION_* 34#include <CoreFoundation/CFString.h> 35#endif // __APPLE__ 36 37#if ASAN_HAS_EXCEPTIONS 38# define ASAN_THROW(x) throw (x) 39#else 40# define ASAN_THROW(x) 41#endif 42 43#include <sys/mman.h> 44 45typedef uint8_t U1; 46typedef uint16_t U2; 47typedef uint32_t U4; 48typedef uint64_t U8; 49 50static const char *progname; 51static const int kPageSize = 4096; 52 53// Simple stand-alone pseudorandom number generator. 54// Current algorithm is ANSI C linear congruential PRNG. 55static inline uint32_t my_rand(uint32_t* state) { 56 return (*state = *state * 1103515245 + 12345) >> 16; 57} 58 59static uint32_t global_seed = 0; 60 61const size_t kLargeMalloc = 1 << 24; 62 63template<typename T> 64NOINLINE void asan_write(T *a) { 65 *a = 0; 66} 67 68NOINLINE void asan_write_sized_aligned(uint8_t *p, size_t size) { 69 EXPECT_EQ(0, ((uintptr_t)p % size)); 70 if (size == 1) asan_write((uint8_t*)p); 71 else if (size == 2) asan_write((uint16_t*)p); 72 else if (size == 4) asan_write((uint32_t*)p); 73 else if (size == 8) asan_write((uint64_t*)p); 74} 75 76NOINLINE void *malloc_fff(size_t size) { 77 void *res = malloc/**/(size); break_optimization(0); return res;} 78NOINLINE void *malloc_eee(size_t size) { 79 void *res = malloc_fff(size); break_optimization(0); return res;} 80NOINLINE void *malloc_ddd(size_t size) { 81 void *res = malloc_eee(size); break_optimization(0); return res;} 82NOINLINE void *malloc_ccc(size_t size) { 83 void *res = malloc_ddd(size); break_optimization(0); return res;} 84NOINLINE void *malloc_bbb(size_t size) { 85 void *res = malloc_ccc(size); break_optimization(0); return res;} 86NOINLINE void *malloc_aaa(size_t size) { 87 void *res = malloc_bbb(size); break_optimization(0); return res;} 88 89#ifndef __APPLE__ 90NOINLINE void *memalign_fff(size_t alignment, size_t size) { 91 void *res = memalign/**/(alignment, size); break_optimization(0); return res;} 92NOINLINE void *memalign_eee(size_t alignment, size_t size) { 93 void *res = memalign_fff(alignment, size); break_optimization(0); return res;} 94NOINLINE void *memalign_ddd(size_t alignment, size_t size) { 95 void *res = memalign_eee(alignment, size); break_optimization(0); return res;} 96NOINLINE void *memalign_ccc(size_t alignment, size_t size) { 97 void *res = memalign_ddd(alignment, size); break_optimization(0); return res;} 98NOINLINE void *memalign_bbb(size_t alignment, size_t size) { 99 void *res = memalign_ccc(alignment, size); break_optimization(0); return res;} 100NOINLINE void *memalign_aaa(size_t alignment, size_t size) { 101 void *res = memalign_bbb(alignment, size); break_optimization(0); return res;} 102#endif // __APPLE__ 103 104 105NOINLINE void free_ccc(void *p) { free(p); break_optimization(0);} 106NOINLINE void free_bbb(void *p) { free_ccc(p); break_optimization(0);} 107NOINLINE void free_aaa(void *p) { free_bbb(p); break_optimization(0);} 108 109template<typename T> 110NOINLINE void oob_test(int size, int off) { 111 char *p = (char*)malloc_aaa(size); 112 // fprintf(stderr, "writing %d byte(s) into [%p,%p) with offset %d\n", 113 // sizeof(T), p, p + size, off); 114 asan_write((T*)(p + off)); 115 free_aaa(p); 116} 117 118 119template<typename T> 120NOINLINE void uaf_test(int size, int off) { 121 char *p = (char *)malloc_aaa(size); 122 free_aaa(p); 123 for (int i = 1; i < 100; i++) 124 free_aaa(malloc_aaa(i)); 125 fprintf(stderr, "writing %ld byte(s) at %p with offset %d\n", 126 (long)sizeof(T), p, off); 127 asan_write((T*)(p + off)); 128} 129 130TEST(AddressSanitizer, HasFeatureAddressSanitizerTest) { 131#if defined(__has_feature) && __has_feature(address_sanitizer) 132 bool asan = 1; 133#else 134 bool asan = 0; 135#endif 136 EXPECT_EQ(true, asan); 137} 138 139TEST(AddressSanitizer, SimpleDeathTest) { 140 EXPECT_DEATH(exit(1), ""); 141} 142 143TEST(AddressSanitizer, VariousMallocsTest) { 144 // fprintf(stderr, "malloc:\n"); 145 int *a = (int*)malloc(100 * sizeof(int)); 146 a[50] = 0; 147 free(a); 148 149 // fprintf(stderr, "realloc:\n"); 150 int *r = (int*)malloc(10); 151 r = (int*)realloc(r, 2000 * sizeof(int)); 152 r[1000] = 0; 153 free(r); 154 155 // fprintf(stderr, "operator new []\n"); 156 int *b = new int[100]; 157 b[50] = 0; 158 delete [] b; 159 160 // fprintf(stderr, "operator new\n"); 161 int *c = new int; 162 *c = 0; 163 delete c; 164 165#if !defined(__APPLE__) && !defined(ANDROID) 166 // fprintf(stderr, "posix_memalign\n"); 167 int *pm; 168 int pm_res = posix_memalign((void**)&pm, kPageSize, kPageSize); 169 EXPECT_EQ(0, pm_res); 170 free(pm); 171#endif 172 173#if !defined(__APPLE__) 174 int *ma = (int*)memalign(kPageSize, kPageSize); 175 EXPECT_EQ(0, (uintptr_t)ma % kPageSize); 176 ma[123] = 0; 177 free(ma); 178#endif // __APPLE__ 179} 180 181TEST(AddressSanitizer, CallocTest) { 182 int *a = (int*)calloc(100, sizeof(int)); 183 EXPECT_EQ(0, a[10]); 184 free(a); 185} 186 187TEST(AddressSanitizer, VallocTest) { 188 void *a = valloc(100); 189 EXPECT_EQ(0, (uintptr_t)a % kPageSize); 190 free(a); 191} 192 193#ifndef __APPLE__ 194TEST(AddressSanitizer, PvallocTest) { 195 char *a = (char*)pvalloc(kPageSize + 100); 196 EXPECT_EQ(0, (uintptr_t)a % kPageSize); 197 a[kPageSize + 101] = 1; // we should not report an error here. 198 free(a); 199 200 a = (char*)pvalloc(0); // pvalloc(0) should allocate at least one page. 201 EXPECT_EQ(0, (uintptr_t)a % kPageSize); 202 a[101] = 1; // we should not report an error here. 203 free(a); 204} 205#endif // __APPLE__ 206 207void *TSDWorker(void *test_key) { 208 if (test_key) { 209 pthread_setspecific(*(pthread_key_t*)test_key, (void*)0xfeedface); 210 } 211 return NULL; 212} 213 214void TSDDestructor(void *tsd) { 215 // Spawning a thread will check that the current thread id is not -1. 216 pthread_t th; 217 pthread_create(&th, NULL, TSDWorker, NULL); 218 pthread_join(th, NULL); 219} 220 221// This tests triggers the thread-specific data destruction fiasco which occurs 222// if we don't manage the TSD destructors ourselves. We create a new pthread 223// key with a non-NULL destructor which is likely to be put after the destructor 224// of AsanThread in the list of destructors. 225// In this case the TSD for AsanThread will be destroyed before TSDDestructor 226// is called for the child thread, and a CHECK will fail when we call 227// pthread_create() to spawn the grandchild. 228TEST(AddressSanitizer, DISABLED_TSDTest) { 229 pthread_t th; 230 pthread_key_t test_key; 231 pthread_key_create(&test_key, TSDDestructor); 232 pthread_create(&th, NULL, TSDWorker, &test_key); 233 pthread_join(th, NULL); 234 pthread_key_delete(test_key); 235} 236 237template<typename T> 238void OOBTest() { 239 char expected_str[100]; 240 for (int size = sizeof(T); size < 20; size += 5) { 241 for (int i = -5; i < 0; i++) { 242 const char *str = 243 "is located.*%d byte.*to the left"; 244 sprintf(expected_str, str, abs(i)); 245 EXPECT_DEATH(oob_test<T>(size, i), expected_str); 246 } 247 248 for (int i = 0; i < size - sizeof(T) + 1; i++) 249 oob_test<T>(size, i); 250 251 for (int i = size - sizeof(T) + 1; i <= size + 3 * sizeof(T); i++) { 252 const char *str = 253 "is located.*%d byte.*to the right"; 254 int off = i >= size ? (i - size) : 0; 255 // we don't catch unaligned partially OOB accesses. 256 if (i % sizeof(T)) continue; 257 sprintf(expected_str, str, off); 258 EXPECT_DEATH(oob_test<T>(size, i), expected_str); 259 } 260 } 261 262 EXPECT_DEATH(oob_test<T>(kLargeMalloc, -1), 263 "is located.*1 byte.*to the left"); 264 EXPECT_DEATH(oob_test<T>(kLargeMalloc, kLargeMalloc), 265 "is located.*0 byte.*to the right"); 266} 267 268// TODO(glider): the following tests are EXTREMELY slow on Darwin: 269// AddressSanitizer.OOB_char (125503 ms) 270// AddressSanitizer.OOB_int (126890 ms) 271// AddressSanitizer.OOBRightTest (315605 ms) 272// AddressSanitizer.SimpleStackTest (366559 ms) 273 274TEST(AddressSanitizer, OOB_char) { 275 OOBTest<U1>(); 276} 277 278TEST(AddressSanitizer, OOB_int) { 279 OOBTest<U4>(); 280} 281 282TEST(AddressSanitizer, OOBRightTest) { 283 for (size_t access_size = 1; access_size <= 8; access_size *= 2) { 284 for (size_t alloc_size = 1; alloc_size <= 8; alloc_size++) { 285 for (size_t offset = 0; offset <= 8; offset += access_size) { 286 void *p = malloc(alloc_size); 287 // allocated: [p, p + alloc_size) 288 // accessed: [p + offset, p + offset + access_size) 289 uint8_t *addr = (uint8_t*)p + offset; 290 if (offset + access_size <= alloc_size) { 291 asan_write_sized_aligned(addr, access_size); 292 } else { 293 int outside_bytes = offset > alloc_size ? (offset - alloc_size) : 0; 294 const char *str = 295 "is located.%d *byte.*to the right"; 296 char expected_str[100]; 297 sprintf(expected_str, str, outside_bytes); 298 EXPECT_DEATH(asan_write_sized_aligned(addr, access_size), 299 expected_str); 300 } 301 free(p); 302 } 303 } 304 } 305} 306 307TEST(AddressSanitizer, UAF_char) { 308 const char *uaf_string = "AddressSanitizer.*heap-use-after-free"; 309 EXPECT_DEATH(uaf_test<U1>(1, 0), uaf_string); 310 EXPECT_DEATH(uaf_test<U1>(10, 0), uaf_string); 311 EXPECT_DEATH(uaf_test<U1>(10, 10), uaf_string); 312 EXPECT_DEATH(uaf_test<U1>(kLargeMalloc, 0), uaf_string); 313 EXPECT_DEATH(uaf_test<U1>(kLargeMalloc, kLargeMalloc / 2), uaf_string); 314} 315 316#if ASAN_HAS_BLACKLIST 317TEST(AddressSanitizer, IgnoreTest) { 318 int *x = Ident(new int); 319 delete Ident(x); 320 *x = 0; 321} 322#endif // ASAN_HAS_BLACKLIST 323 324struct StructWithBitField { 325 int bf1:1; 326 int bf2:1; 327 int bf3:1; 328 int bf4:29; 329}; 330 331TEST(AddressSanitizer, BitFieldPositiveTest) { 332 StructWithBitField *x = new StructWithBitField; 333 delete Ident(x); 334 EXPECT_DEATH(x->bf1 = 0, "use-after-free"); 335 EXPECT_DEATH(x->bf2 = 0, "use-after-free"); 336 EXPECT_DEATH(x->bf3 = 0, "use-after-free"); 337 EXPECT_DEATH(x->bf4 = 0, "use-after-free"); 338}; 339 340struct StructWithBitFields_8_24 { 341 int a:8; 342 int b:24; 343}; 344 345TEST(AddressSanitizer, BitFieldNegativeTest) { 346 StructWithBitFields_8_24 *x = Ident(new StructWithBitFields_8_24); 347 x->a = 0; 348 x->b = 0; 349 delete Ident(x); 350} 351 352TEST(AddressSanitizer, OutOfMemoryTest) { 353 size_t size = __WORDSIZE == 64 ? (size_t)(1ULL << 48) : (0xf0000000); 354 EXPECT_EQ(0, realloc(0, size)); 355 EXPECT_EQ(0, realloc(0, ~Ident(0))); 356 EXPECT_EQ(0, malloc(size)); 357 EXPECT_EQ(0, malloc(~Ident(0))); 358 EXPECT_EQ(0, calloc(1, size)); 359 EXPECT_EQ(0, calloc(1, ~Ident(0))); 360} 361 362#if ASAN_NEEDS_SEGV 363TEST(AddressSanitizer, WildAddressTest) { 364 char *c = (char*)0x123; 365 EXPECT_DEATH(*c = 0, "AddressSanitizer crashed on unknown address"); 366} 367#endif 368 369static void MallocStress(size_t n) { 370 uint32_t seed = my_rand(&global_seed); 371 for (size_t iter = 0; iter < 10; iter++) { 372 vector<void *> vec; 373 for (size_t i = 0; i < n; i++) { 374 if ((i % 3) == 0) { 375 if (vec.empty()) continue; 376 size_t idx = my_rand(&seed) % vec.size(); 377 void *ptr = vec[idx]; 378 vec[idx] = vec.back(); 379 vec.pop_back(); 380 free_aaa(ptr); 381 } else { 382 size_t size = my_rand(&seed) % 1000 + 1; 383#ifndef __APPLE__ 384 size_t alignment = 1 << (my_rand(&seed) % 7 + 3); 385 char *ptr = (char*)memalign_aaa(alignment, size); 386#else 387 char *ptr = (char*) malloc_aaa(size); 388#endif 389 vec.push_back(ptr); 390 ptr[0] = 0; 391 ptr[size-1] = 0; 392 ptr[size/2] = 0; 393 } 394 } 395 for (size_t i = 0; i < vec.size(); i++) 396 free_aaa(vec[i]); 397 } 398} 399 400TEST(AddressSanitizer, MallocStressTest) { 401 MallocStress((ASAN_LOW_MEMORY) ? 20000 : 200000); 402} 403 404static void TestLargeMalloc(size_t size) { 405 char buff[1024]; 406 sprintf(buff, "is located 1 bytes to the left of %lu-byte", (long)size); 407 EXPECT_DEATH(Ident((char*)malloc(size))[-1] = 0, buff); 408} 409 410TEST(AddressSanitizer, LargeMallocTest) { 411 for (int i = 113; i < (1 << 28); i = i * 2 + 13) { 412 TestLargeMalloc(i); 413 } 414} 415 416#if ASAN_LOW_MEMORY != 1 417TEST(AddressSanitizer, HugeMallocTest) { 418#ifdef __APPLE__ 419 // It was empirically found out that 1215 megabytes is the maximum amount of 420 // memory available to the process under AddressSanitizer on 32-bit Mac 10.6. 421 // 32-bit Mac 10.7 gives even less (< 1G). 422 // (the libSystem malloc() allows allocating up to 2300 megabytes without 423 // ASan). 424 size_t n_megs = __WORDSIZE == 32 ? 500 : 4100; 425#else 426 size_t n_megs = __WORDSIZE == 32 ? 2600 : 4100; 427#endif 428 TestLargeMalloc(n_megs << 20); 429} 430#endif 431 432TEST(AddressSanitizer, ThreadedMallocStressTest) { 433 const int kNumThreads = 4; 434 const int kNumIterations = (ASAN_LOW_MEMORY) ? 10000 : 100000; 435 pthread_t t[kNumThreads]; 436 for (int i = 0; i < kNumThreads; i++) { 437 pthread_create(&t[i], 0, (void* (*)(void *x))MallocStress, 438 (void*)kNumIterations); 439 } 440 for (int i = 0; i < kNumThreads; i++) { 441 pthread_join(t[i], 0); 442 } 443} 444 445void *ManyThreadsWorker(void *a) { 446 for (int iter = 0; iter < 100; iter++) { 447 for (size_t size = 100; size < 2000; size *= 2) { 448 free(Ident(malloc(size))); 449 } 450 } 451 return 0; 452} 453 454TEST(AddressSanitizer, ManyThreadsTest) { 455 const size_t kNumThreads = __WORDSIZE == 32 ? 30 : 1000; 456 pthread_t t[kNumThreads]; 457 for (size_t i = 0; i < kNumThreads; i++) { 458 pthread_create(&t[i], 0, (void* (*)(void *x))ManyThreadsWorker, (void*)i); 459 } 460 for (size_t i = 0; i < kNumThreads; i++) { 461 pthread_join(t[i], 0); 462 } 463} 464 465TEST(AddressSanitizer, ReallocTest) { 466 const int kMinElem = 5; 467 int *ptr = (int*)malloc(sizeof(int) * kMinElem); 468 ptr[3] = 3; 469 for (int i = 0; i < 10000; i++) { 470 ptr = (int*)realloc(ptr, 471 (my_rand(&global_seed) % 1000 + kMinElem) * sizeof(int)); 472 EXPECT_EQ(3, ptr[3]); 473 } 474} 475 476#ifndef __APPLE__ 477static const char *kMallocUsableSizeErrorMsg = 478 "AddressSanitizer attempting to call malloc_usable_size()"; 479 480TEST(AddressSanitizer, MallocUsableSizeTest) { 481 const size_t kArraySize = 100; 482 char *array = Ident((char*)malloc(kArraySize)); 483 int *int_ptr = Ident(new int); 484 EXPECT_EQ(0, malloc_usable_size(NULL)); 485 EXPECT_EQ(kArraySize, malloc_usable_size(array)); 486 EXPECT_EQ(sizeof(int), malloc_usable_size(int_ptr)); 487 EXPECT_DEATH(malloc_usable_size((void*)0x123), kMallocUsableSizeErrorMsg); 488 EXPECT_DEATH(malloc_usable_size(array + kArraySize / 2), 489 kMallocUsableSizeErrorMsg); 490 free(array); 491 EXPECT_DEATH(malloc_usable_size(array), kMallocUsableSizeErrorMsg); 492} 493#endif 494 495void WrongFree() { 496 int *x = (int*)malloc(100 * sizeof(int)); 497 // Use the allocated memory, otherwise Clang will optimize it out. 498 Ident(x); 499 free(x + 1); 500} 501 502TEST(AddressSanitizer, WrongFreeTest) { 503 EXPECT_DEATH(WrongFree(), 504 "ERROR: AddressSanitizer attempting free.*not malloc"); 505} 506 507void DoubleFree() { 508 int *x = (int*)malloc(100 * sizeof(int)); 509 fprintf(stderr, "DoubleFree: x=%p\n", x); 510 free(x); 511 free(x); 512 fprintf(stderr, "should have failed in the second free(%p)\n", x); 513 abort(); 514} 515 516TEST(AddressSanitizer, DoubleFreeTest) { 517 EXPECT_DEATH(DoubleFree(), ASAN_PCRE_DOTALL 518 "ERROR: AddressSanitizer attempting double-free" 519 ".*is located 0 bytes inside of 400-byte region" 520 ".*freed by thread T0 here" 521 ".*previously allocated by thread T0 here"); 522} 523 524template<int kSize> 525NOINLINE void SizedStackTest() { 526 char a[kSize]; 527 char *A = Ident((char*)&a); 528 for (size_t i = 0; i < kSize; i++) 529 A[i] = i; 530 EXPECT_DEATH(A[-1] = 0, ""); 531 EXPECT_DEATH(A[-20] = 0, ""); 532 EXPECT_DEATH(A[-31] = 0, ""); 533 EXPECT_DEATH(A[kSize] = 0, ""); 534 EXPECT_DEATH(A[kSize + 1] = 0, ""); 535 EXPECT_DEATH(A[kSize + 10] = 0, ""); 536 EXPECT_DEATH(A[kSize + 31] = 0, ""); 537} 538 539TEST(AddressSanitizer, SimpleStackTest) { 540 SizedStackTest<1>(); 541 SizedStackTest<2>(); 542 SizedStackTest<3>(); 543 SizedStackTest<4>(); 544 SizedStackTest<5>(); 545 SizedStackTest<6>(); 546 SizedStackTest<7>(); 547 SizedStackTest<16>(); 548 SizedStackTest<25>(); 549 SizedStackTest<34>(); 550 SizedStackTest<43>(); 551 SizedStackTest<51>(); 552 SizedStackTest<62>(); 553 SizedStackTest<64>(); 554 SizedStackTest<128>(); 555} 556 557TEST(AddressSanitizer, ManyStackObjectsTest) { 558 char XXX[10]; 559 char YYY[20]; 560 char ZZZ[30]; 561 Ident(XXX); 562 Ident(YYY); 563 EXPECT_DEATH(Ident(ZZZ)[-1] = 0, ASAN_PCRE_DOTALL "XXX.*YYY.*ZZZ"); 564} 565 566NOINLINE static void Frame0(int frame, char *a, char *b, char *c) { 567 char d[4] = {0}; 568 char *D = Ident(d); 569 switch (frame) { 570 case 3: a[5]++; break; 571 case 2: b[5]++; break; 572 case 1: c[5]++; break; 573 case 0: D[5]++; break; 574 } 575} 576NOINLINE static void Frame1(int frame, char *a, char *b) { 577 char c[4] = {0}; Frame0(frame, a, b, c); 578 break_optimization(0); 579} 580NOINLINE static void Frame2(int frame, char *a) { 581 char b[4] = {0}; Frame1(frame, a, b); 582 break_optimization(0); 583} 584NOINLINE static void Frame3(int frame) { 585 char a[4] = {0}; Frame2(frame, a); 586 break_optimization(0); 587} 588 589TEST(AddressSanitizer, GuiltyStackFrame0Test) { 590 EXPECT_DEATH(Frame3(0), "located .*in frame <.*Frame0"); 591} 592TEST(AddressSanitizer, GuiltyStackFrame1Test) { 593 EXPECT_DEATH(Frame3(1), "located .*in frame <.*Frame1"); 594} 595TEST(AddressSanitizer, GuiltyStackFrame2Test) { 596 EXPECT_DEATH(Frame3(2), "located .*in frame <.*Frame2"); 597} 598TEST(AddressSanitizer, GuiltyStackFrame3Test) { 599 EXPECT_DEATH(Frame3(3), "located .*in frame <.*Frame3"); 600} 601 602NOINLINE void LongJmpFunc1(jmp_buf buf) { 603 // create three red zones for these two stack objects. 604 int a; 605 int b; 606 607 int *A = Ident(&a); 608 int *B = Ident(&b); 609 *A = *B; 610 longjmp(buf, 1); 611} 612 613NOINLINE void UnderscopeLongJmpFunc1(jmp_buf buf) { 614 // create three red zones for these two stack objects. 615 int a; 616 int b; 617 618 int *A = Ident(&a); 619 int *B = Ident(&b); 620 *A = *B; 621 _longjmp(buf, 1); 622} 623 624NOINLINE void SigLongJmpFunc1(sigjmp_buf buf) { 625 // create three red zones for these two stack objects. 626 int a; 627 int b; 628 629 int *A = Ident(&a); 630 int *B = Ident(&b); 631 *A = *B; 632 siglongjmp(buf, 1); 633} 634 635 636NOINLINE void TouchStackFunc() { 637 int a[100]; // long array will intersect with redzones from LongJmpFunc1. 638 int *A = Ident(a); 639 for (int i = 0; i < 100; i++) 640 A[i] = i*i; 641} 642 643// Test that we handle longjmp and do not report fals positives on stack. 644TEST(AddressSanitizer, LongJmpTest) { 645 static jmp_buf buf; 646 if (!setjmp(buf)) { 647 LongJmpFunc1(buf); 648 } else { 649 TouchStackFunc(); 650 } 651} 652 653TEST(AddressSanitizer, UnderscopeLongJmpTest) { 654 static jmp_buf buf; 655 if (!_setjmp(buf)) { 656 UnderscopeLongJmpFunc1(buf); 657 } else { 658 TouchStackFunc(); 659 } 660} 661 662TEST(AddressSanitizer, SigLongJmpTest) { 663 static sigjmp_buf buf; 664 if (!sigsetjmp(buf, 1)) { 665 SigLongJmpFunc1(buf); 666 } else { 667 TouchStackFunc(); 668 } 669} 670 671#ifdef __EXCEPTIONS 672NOINLINE void ThrowFunc() { 673 // create three red zones for these two stack objects. 674 int a; 675 int b; 676 677 int *A = Ident(&a); 678 int *B = Ident(&b); 679 *A = *B; 680 ASAN_THROW(1); 681} 682 683TEST(AddressSanitizer, CxxExceptionTest) { 684 if (ASAN_UAR) return; 685 // TODO(kcc): this test crashes on 32-bit for some reason... 686 if (__WORDSIZE == 32) return; 687 try { 688 ThrowFunc(); 689 } catch(...) {} 690 TouchStackFunc(); 691} 692#endif 693 694void *ThreadStackReuseFunc1(void *unused) { 695 // create three red zones for these two stack objects. 696 int a; 697 int b; 698 699 int *A = Ident(&a); 700 int *B = Ident(&b); 701 *A = *B; 702 pthread_exit(0); 703 return 0; 704} 705 706void *ThreadStackReuseFunc2(void *unused) { 707 TouchStackFunc(); 708 return 0; 709} 710 711TEST(AddressSanitizer, ThreadStackReuseTest) { 712 pthread_t t; 713 pthread_create(&t, 0, ThreadStackReuseFunc1, 0); 714 pthread_join(t, 0); 715 pthread_create(&t, 0, ThreadStackReuseFunc2, 0); 716 pthread_join(t, 0); 717} 718 719#if defined(__i386__) || defined(__x86_64__) 720TEST(AddressSanitizer, Store128Test) { 721 char *a = Ident((char*)malloc(Ident(12))); 722 char *p = a; 723 if (((uintptr_t)a % 16) != 0) 724 p = a + 8; 725 assert(((uintptr_t)p % 16) == 0); 726 __m128i value_wide = _mm_set1_epi16(0x1234); 727 EXPECT_DEATH(_mm_store_si128((__m128i*)p, value_wide), 728 "AddressSanitizer heap-buffer-overflow"); 729 EXPECT_DEATH(_mm_store_si128((__m128i*)p, value_wide), 730 "WRITE of size 16"); 731 EXPECT_DEATH(_mm_store_si128((__m128i*)p, value_wide), 732 "located 0 bytes to the right of 12-byte"); 733 free(a); 734} 735#endif 736 737static string RightOOBErrorMessage(int oob_distance) { 738 assert(oob_distance >= 0); 739 char expected_str[100]; 740 sprintf(expected_str, "located %d bytes to the right", oob_distance); 741 return string(expected_str); 742} 743 744static string LeftOOBErrorMessage(int oob_distance) { 745 assert(oob_distance > 0); 746 char expected_str[100]; 747 sprintf(expected_str, "located %d bytes to the left", oob_distance); 748 return string(expected_str); 749} 750 751template<typename T> 752void MemSetOOBTestTemplate(size_t length) { 753 if (length == 0) return; 754 size_t size = Ident(sizeof(T) * length); 755 T *array = Ident((T*)malloc(size)); 756 int element = Ident(42); 757 int zero = Ident(0); 758 // memset interval inside array 759 memset(array, element, size); 760 memset(array, element, size - 1); 761 memset(array + length - 1, element, sizeof(T)); 762 memset(array, element, 1); 763 764 // memset 0 bytes 765 memset(array - 10, element, zero); 766 memset(array - 1, element, zero); 767 memset(array, element, zero); 768 memset(array + length, 0, zero); 769 memset(array + length + 1, 0, zero); 770 771 // try to memset bytes to the right of array 772 EXPECT_DEATH(memset(array, 0, size + 1), 773 RightOOBErrorMessage(0)); 774 EXPECT_DEATH(memset((char*)(array + length) - 1, element, 6), 775 RightOOBErrorMessage(4)); 776 EXPECT_DEATH(memset(array + 1, element, size + sizeof(T)), 777 RightOOBErrorMessage(2 * sizeof(T) - 1)); 778 // whole interval is to the right 779 EXPECT_DEATH(memset(array + length + 1, 0, 10), 780 RightOOBErrorMessage(sizeof(T))); 781 782 // try to memset bytes to the left of array 783 EXPECT_DEATH(memset((char*)array - 1, element, size), 784 LeftOOBErrorMessage(1)); 785 EXPECT_DEATH(memset((char*)array - 5, 0, 6), 786 LeftOOBErrorMessage(5)); 787 EXPECT_DEATH(memset(array - 5, element, size + 5 * sizeof(T)), 788 LeftOOBErrorMessage(5 * sizeof(T))); 789 // whole interval is to the left 790 EXPECT_DEATH(memset(array - 2, 0, sizeof(T)), 791 LeftOOBErrorMessage(2 * sizeof(T))); 792 793 // try to memset bytes both to the left & to the right 794 EXPECT_DEATH(memset((char*)array - 2, element, size + 4), 795 LeftOOBErrorMessage(2)); 796 797 free(array); 798} 799 800TEST(AddressSanitizer, MemSetOOBTest) { 801 MemSetOOBTestTemplate<char>(100); 802 MemSetOOBTestTemplate<int>(5); 803 MemSetOOBTestTemplate<double>(256); 804 // We can test arrays of structres/classes here, but what for? 805} 806 807// Same test for memcpy and memmove functions 808template <typename T, class M> 809void MemTransferOOBTestTemplate(size_t length) { 810 if (length == 0) return; 811 size_t size = Ident(sizeof(T) * length); 812 T *src = Ident((T*)malloc(size)); 813 T *dest = Ident((T*)malloc(size)); 814 int zero = Ident(0); 815 816 // valid transfer of bytes between arrays 817 M::transfer(dest, src, size); 818 M::transfer(dest + 1, src, size - sizeof(T)); 819 M::transfer(dest, src + length - 1, sizeof(T)); 820 M::transfer(dest, src, 1); 821 822 // transfer zero bytes 823 M::transfer(dest - 1, src, 0); 824 M::transfer(dest + length, src, zero); 825 M::transfer(dest, src - 1, zero); 826 M::transfer(dest, src, zero); 827 828 // try to change mem to the right of dest 829 EXPECT_DEATH(M::transfer(dest + 1, src, size), 830 RightOOBErrorMessage(sizeof(T) - 1)); 831 EXPECT_DEATH(M::transfer((char*)(dest + length) - 1, src, 5), 832 RightOOBErrorMessage(3)); 833 834 // try to change mem to the left of dest 835 EXPECT_DEATH(M::transfer(dest - 2, src, size), 836 LeftOOBErrorMessage(2 * sizeof(T))); 837 EXPECT_DEATH(M::transfer((char*)dest - 3, src, 4), 838 LeftOOBErrorMessage(3)); 839 840 // try to access mem to the right of src 841 EXPECT_DEATH(M::transfer(dest, src + 2, size), 842 RightOOBErrorMessage(2 * sizeof(T) - 1)); 843 EXPECT_DEATH(M::transfer(dest, (char*)(src + length) - 3, 6), 844 RightOOBErrorMessage(2)); 845 846 // try to access mem to the left of src 847 EXPECT_DEATH(M::transfer(dest, src - 1, size), 848 LeftOOBErrorMessage(sizeof(T))); 849 EXPECT_DEATH(M::transfer(dest, (char*)src - 6, 7), 850 LeftOOBErrorMessage(6)); 851 852 // Generally we don't need to test cases where both accessing src and writing 853 // to dest address to poisoned memory. 854 855 T *big_src = Ident((T*)malloc(size * 2)); 856 T *big_dest = Ident((T*)malloc(size * 2)); 857 // try to change mem to both sides of dest 858 EXPECT_DEATH(M::transfer(dest - 1, big_src, size * 2), 859 LeftOOBErrorMessage(sizeof(T))); 860 // try to access mem to both sides of src 861 EXPECT_DEATH(M::transfer(big_dest, src - 2, size * 2), 862 LeftOOBErrorMessage(2 * sizeof(T))); 863 864 free(src); 865 free(dest); 866 free(big_src); 867 free(big_dest); 868} 869 870class MemCpyWrapper { 871 public: 872 static void* transfer(void *to, const void *from, size_t size) { 873 return memcpy(to, from, size); 874 } 875}; 876TEST(AddressSanitizer, MemCpyOOBTest) { 877 MemTransferOOBTestTemplate<char, MemCpyWrapper>(100); 878 MemTransferOOBTestTemplate<int, MemCpyWrapper>(1024); 879} 880 881class MemMoveWrapper { 882 public: 883 static void* transfer(void *to, const void *from, size_t size) { 884 return memmove(to, from, size); 885 } 886}; 887TEST(AddressSanitizer, MemMoveOOBTest) { 888 MemTransferOOBTestTemplate<char, MemMoveWrapper>(100); 889 MemTransferOOBTestTemplate<int, MemMoveWrapper>(1024); 890} 891 892// Tests for string functions 893 894// Used for string functions tests 895static char global_string[] = "global"; 896static size_t global_string_length = 6; 897 898// Input to a test is a zero-terminated string str with given length 899// Accesses to the bytes to the left and to the right of str 900// are presumed to produce OOB errors 901void StrLenOOBTestTemplate(char *str, size_t length, bool is_global) { 902 // Normal strlen calls 903 EXPECT_EQ(strlen(str), length); 904 if (length > 0) { 905 EXPECT_EQ(strlen(str + 1), length - 1); 906 EXPECT_EQ(strlen(str + length), 0); 907 } 908 // Arg of strlen is not malloced, OOB access 909 if (!is_global) { 910 // We don't insert RedZones to the left of global variables 911 EXPECT_DEATH(Ident(strlen(str - 1)), LeftOOBErrorMessage(1)); 912 EXPECT_DEATH(Ident(strlen(str - 5)), LeftOOBErrorMessage(5)); 913 } 914 EXPECT_DEATH(Ident(strlen(str + length + 1)), RightOOBErrorMessage(0)); 915 // Overwrite terminator 916 str[length] = 'a'; 917 // String is not zero-terminated, strlen will lead to OOB access 918 EXPECT_DEATH(Ident(strlen(str)), RightOOBErrorMessage(0)); 919 EXPECT_DEATH(Ident(strlen(str + length)), RightOOBErrorMessage(0)); 920 // Restore terminator 921 str[length] = 0; 922} 923TEST(AddressSanitizer, StrLenOOBTest) { 924 // Check heap-allocated string 925 size_t length = Ident(10); 926 char *heap_string = Ident((char*)malloc(length + 1)); 927 char stack_string[10 + 1]; 928 for (int i = 0; i < length; i++) { 929 heap_string[i] = 'a'; 930 stack_string[i] = 'b'; 931 } 932 heap_string[length] = 0; 933 stack_string[length] = 0; 934 StrLenOOBTestTemplate(heap_string, length, false); 935 // TODO(samsonov): Fix expected messages in StrLenOOBTestTemplate to 936 // make test for stack_string work. Or move it to output tests. 937 // StrLenOOBTestTemplate(stack_string, length, false); 938 StrLenOOBTestTemplate(global_string, global_string_length, true); 939 free(heap_string); 940} 941 942static inline char* MallocAndMemsetString(size_t size, char ch) { 943 char *s = Ident((char*)malloc(size)); 944 memset(s, ch, size); 945 return s; 946} 947static inline char* MallocAndMemsetString(size_t size) { 948 return MallocAndMemsetString(size, 'z'); 949} 950 951#ifndef __APPLE__ 952TEST(AddressSanitizer, StrNLenOOBTest) { 953 size_t size = Ident(123); 954 char *str = MallocAndMemsetString(size); 955 // Normal strnlen calls. 956 Ident(strnlen(str - 1, 0)); 957 Ident(strnlen(str, size)); 958 Ident(strnlen(str + size - 1, 1)); 959 str[size - 1] = '\0'; 960 Ident(strnlen(str, 2 * size)); 961 // Argument points to not allocated memory. 962 EXPECT_DEATH(Ident(strnlen(str - 1, 1)), LeftOOBErrorMessage(1)); 963 EXPECT_DEATH(Ident(strnlen(str + size, 1)), RightOOBErrorMessage(0)); 964 // Overwrite the terminating '\0' and hit unallocated memory. 965 str[size - 1] = 'z'; 966 EXPECT_DEATH(Ident(strnlen(str, size + 1)), RightOOBErrorMessage(0)); 967 free(str); 968} 969#endif 970 971TEST(AddressSanitizer, StrDupOOBTest) { 972 size_t size = Ident(42); 973 char *str = MallocAndMemsetString(size); 974 char *new_str; 975 // Normal strdup calls. 976 str[size - 1] = '\0'; 977 new_str = strdup(str); 978 free(new_str); 979 new_str = strdup(str + size - 1); 980 free(new_str); 981 // Argument points to not allocated memory. 982 EXPECT_DEATH(Ident(strdup(str - 1)), LeftOOBErrorMessage(1)); 983 EXPECT_DEATH(Ident(strdup(str + size)), RightOOBErrorMessage(0)); 984 // Overwrite the terminating '\0' and hit unallocated memory. 985 str[size - 1] = 'z'; 986 EXPECT_DEATH(Ident(strdup(str)), RightOOBErrorMessage(0)); 987 free(str); 988} 989 990TEST(AddressSanitizer, StrCpyOOBTest) { 991 size_t to_size = Ident(30); 992 size_t from_size = Ident(6); // less than to_size 993 char *to = Ident((char*)malloc(to_size)); 994 char *from = Ident((char*)malloc(from_size)); 995 // Normal strcpy calls. 996 strcpy(from, "hello"); 997 strcpy(to, from); 998 strcpy(to + to_size - from_size, from); 999 // Length of "from" is too small. 1000 EXPECT_DEATH(Ident(strcpy(from, "hello2")), RightOOBErrorMessage(0)); 1001 // "to" or "from" points to not allocated memory. 1002 EXPECT_DEATH(Ident(strcpy(to - 1, from)), LeftOOBErrorMessage(1)); 1003 EXPECT_DEATH(Ident(strcpy(to, from - 1)), LeftOOBErrorMessage(1)); 1004 EXPECT_DEATH(Ident(strcpy(to, from + from_size)), RightOOBErrorMessage(0)); 1005 EXPECT_DEATH(Ident(strcpy(to + to_size, from)), RightOOBErrorMessage(0)); 1006 // Overwrite the terminating '\0' character and hit unallocated memory. 1007 from[from_size - 1] = '!'; 1008 EXPECT_DEATH(Ident(strcpy(to, from)), RightOOBErrorMessage(0)); 1009 free(to); 1010 free(from); 1011} 1012 1013TEST(AddressSanitizer, StrNCpyOOBTest) { 1014 size_t to_size = Ident(20); 1015 size_t from_size = Ident(6); // less than to_size 1016 char *to = Ident((char*)malloc(to_size)); 1017 // From is a zero-terminated string "hello\0" of length 6 1018 char *from = Ident((char*)malloc(from_size)); 1019 strcpy(from, "hello"); 1020 // copy 0 bytes 1021 strncpy(to, from, 0); 1022 strncpy(to - 1, from - 1, 0); 1023 // normal strncpy calls 1024 strncpy(to, from, from_size); 1025 strncpy(to, from, to_size); 1026 strncpy(to, from + from_size - 1, to_size); 1027 strncpy(to + to_size - 1, from, 1); 1028 // One of {to, from} points to not allocated memory 1029 EXPECT_DEATH(Ident(strncpy(to, from - 1, from_size)), 1030 LeftOOBErrorMessage(1)); 1031 EXPECT_DEATH(Ident(strncpy(to - 1, from, from_size)), 1032 LeftOOBErrorMessage(1)); 1033 EXPECT_DEATH(Ident(strncpy(to, from + from_size, 1)), 1034 RightOOBErrorMessage(0)); 1035 EXPECT_DEATH(Ident(strncpy(to + to_size, from, 1)), 1036 RightOOBErrorMessage(0)); 1037 // Length of "to" is too small 1038 EXPECT_DEATH(Ident(strncpy(to + to_size - from_size + 1, from, from_size)), 1039 RightOOBErrorMessage(0)); 1040 EXPECT_DEATH(Ident(strncpy(to + 1, from, to_size)), 1041 RightOOBErrorMessage(0)); 1042 // Overwrite terminator in from 1043 from[from_size - 1] = '!'; 1044 // normal strncpy call 1045 strncpy(to, from, from_size); 1046 // Length of "from" is too small 1047 EXPECT_DEATH(Ident(strncpy(to, from, to_size)), 1048 RightOOBErrorMessage(0)); 1049 free(to); 1050 free(from); 1051} 1052 1053typedef char*(*PointerToStrChr)(const char*, int); 1054void RunStrChrTest(PointerToStrChr StrChr) { 1055 size_t size = Ident(100); 1056 char *str = MallocAndMemsetString(size); 1057 str[10] = 'q'; 1058 str[11] = '\0'; 1059 EXPECT_EQ(str, StrChr(str, 'z')); 1060 EXPECT_EQ(str + 10, StrChr(str, 'q')); 1061 EXPECT_EQ(NULL, StrChr(str, 'a')); 1062 // StrChr argument points to not allocated memory. 1063 EXPECT_DEATH(Ident(StrChr(str - 1, 'z')), LeftOOBErrorMessage(1)); 1064 EXPECT_DEATH(Ident(StrChr(str + size, 'z')), RightOOBErrorMessage(0)); 1065 // Overwrite the terminator and hit not allocated memory. 1066 str[11] = 'z'; 1067 EXPECT_DEATH(Ident(StrChr(str, 'a')), RightOOBErrorMessage(0)); 1068 free(str); 1069} 1070TEST(AddressSanitizer, StrChrAndIndexOOBTest) { 1071 RunStrChrTest(&strchr); 1072 RunStrChrTest(&index); 1073} 1074 1075TEST(AddressSanitizer, StrCmpAndFriendsLogicTest) { 1076 // strcmp 1077 EXPECT_EQ(0, strcmp("", "")); 1078 EXPECT_EQ(0, strcmp("abcd", "abcd")); 1079 EXPECT_GT(0, strcmp("ab", "ac")); 1080 EXPECT_GT(0, strcmp("abc", "abcd")); 1081 EXPECT_LT(0, strcmp("acc", "abc")); 1082 EXPECT_LT(0, strcmp("abcd", "abc")); 1083 1084 // strncmp 1085 EXPECT_EQ(0, strncmp("a", "b", 0)); 1086 EXPECT_EQ(0, strncmp("abcd", "abcd", 10)); 1087 EXPECT_EQ(0, strncmp("abcd", "abcef", 3)); 1088 EXPECT_GT(0, strncmp("abcde", "abcfa", 4)); 1089 EXPECT_GT(0, strncmp("a", "b", 5)); 1090 EXPECT_GT(0, strncmp("bc", "bcde", 4)); 1091 EXPECT_LT(0, strncmp("xyz", "xyy", 10)); 1092 EXPECT_LT(0, strncmp("baa", "aaa", 1)); 1093 EXPECT_LT(0, strncmp("zyx", "", 2)); 1094 1095 // strcasecmp 1096 EXPECT_EQ(0, strcasecmp("", "")); 1097 EXPECT_EQ(0, strcasecmp("zzz", "zzz")); 1098 EXPECT_EQ(0, strcasecmp("abCD", "ABcd")); 1099 EXPECT_GT(0, strcasecmp("aB", "Ac")); 1100 EXPECT_GT(0, strcasecmp("ABC", "ABCd")); 1101 EXPECT_LT(0, strcasecmp("acc", "abc")); 1102 EXPECT_LT(0, strcasecmp("ABCd", "abc")); 1103 1104 // strncasecmp 1105 EXPECT_EQ(0, strncasecmp("a", "b", 0)); 1106 EXPECT_EQ(0, strncasecmp("abCD", "ABcd", 10)); 1107 EXPECT_EQ(0, strncasecmp("abCd", "ABcef", 3)); 1108 EXPECT_GT(0, strncasecmp("abcde", "ABCfa", 4)); 1109 EXPECT_GT(0, strncasecmp("a", "B", 5)); 1110 EXPECT_GT(0, strncasecmp("bc", "BCde", 4)); 1111 EXPECT_LT(0, strncasecmp("xyz", "xyy", 10)); 1112 EXPECT_LT(0, strncasecmp("Baa", "aaa", 1)); 1113 EXPECT_LT(0, strncasecmp("zyx", "", 2)); 1114 1115 // memcmp 1116 EXPECT_EQ(0, memcmp("a", "b", 0)); 1117 EXPECT_EQ(0, memcmp("ab\0c", "ab\0c", 4)); 1118 EXPECT_GT(0, memcmp("\0ab", "\0ac", 3)); 1119 EXPECT_GT(0, memcmp("abb\0", "abba", 4)); 1120 EXPECT_LT(0, memcmp("ab\0cd", "ab\0c\0", 5)); 1121 EXPECT_LT(0, memcmp("zza", "zyx", 3)); 1122} 1123 1124typedef int(*PointerToStrCmp)(const char*, const char*); 1125void RunStrCmpTest(PointerToStrCmp StrCmp) { 1126 size_t size = Ident(100); 1127 char *s1 = MallocAndMemsetString(size); 1128 char *s2 = MallocAndMemsetString(size); 1129 s1[size - 1] = '\0'; 1130 s2[size - 1] = '\0'; 1131 // Normal StrCmp calls 1132 Ident(StrCmp(s1, s2)); 1133 Ident(StrCmp(s1, s2 + size - 1)); 1134 Ident(StrCmp(s1 + size - 1, s2 + size - 1)); 1135 s1[size - 1] = 'z'; 1136 s2[size - 1] = 'x'; 1137 Ident(StrCmp(s1, s2)); 1138 // One of arguments points to not allocated memory. 1139 EXPECT_DEATH(Ident(StrCmp)(s1 - 1, s2), LeftOOBErrorMessage(1)); 1140 EXPECT_DEATH(Ident(StrCmp)(s1, s2 - 1), LeftOOBErrorMessage(1)); 1141 EXPECT_DEATH(Ident(StrCmp)(s1 + size, s2), RightOOBErrorMessage(0)); 1142 EXPECT_DEATH(Ident(StrCmp)(s1, s2 + size), RightOOBErrorMessage(0)); 1143 // Hit unallocated memory and die. 1144 s2[size - 1] = 'z'; 1145 EXPECT_DEATH(Ident(StrCmp)(s1, s1), RightOOBErrorMessage(0)); 1146 EXPECT_DEATH(Ident(StrCmp)(s1 + size - 1, s2), RightOOBErrorMessage(0)); 1147 free(s1); 1148 free(s2); 1149} 1150 1151TEST(AddressSanitizer, StrCmpOOBTest) { 1152 RunStrCmpTest(&strcmp); 1153} 1154 1155TEST(AddressSanitizer, StrCaseCmpOOBTest) { 1156 RunStrCmpTest(&strcasecmp); 1157} 1158 1159typedef int(*PointerToStrNCmp)(const char*, const char*, size_t); 1160void RunStrNCmpTest(PointerToStrNCmp StrNCmp) { 1161 size_t size = Ident(100); 1162 char *s1 = MallocAndMemsetString(size); 1163 char *s2 = MallocAndMemsetString(size); 1164 s1[size - 1] = '\0'; 1165 s2[size - 1] = '\0'; 1166 // Normal StrNCmp calls 1167 Ident(StrNCmp(s1, s2, size + 2)); 1168 s1[size - 1] = 'z'; 1169 s2[size - 1] = 'x'; 1170 Ident(StrNCmp(s1 + size - 2, s2 + size - 2, size)); 1171 s2[size - 1] = 'z'; 1172 Ident(StrNCmp(s1 - 1, s2 - 1, 0)); 1173 Ident(StrNCmp(s1 + size - 1, s2 + size - 1, 1)); 1174 // One of arguments points to not allocated memory. 1175 EXPECT_DEATH(Ident(StrNCmp)(s1 - 1, s2, 1), LeftOOBErrorMessage(1)); 1176 EXPECT_DEATH(Ident(StrNCmp)(s1, s2 - 1, 1), LeftOOBErrorMessage(1)); 1177 EXPECT_DEATH(Ident(StrNCmp)(s1 + size, s2, 1), RightOOBErrorMessage(0)); 1178 EXPECT_DEATH(Ident(StrNCmp)(s1, s2 + size, 1), RightOOBErrorMessage(0)); 1179 // Hit unallocated memory and die. 1180 EXPECT_DEATH(Ident(StrNCmp)(s1 + 1, s2 + 1, size), RightOOBErrorMessage(0)); 1181 EXPECT_DEATH(Ident(StrNCmp)(s1 + size - 1, s2, 2), RightOOBErrorMessage(0)); 1182 free(s1); 1183 free(s2); 1184} 1185 1186TEST(AddressSanitizer, StrNCmpOOBTest) { 1187 RunStrNCmpTest(&strncmp); 1188} 1189 1190TEST(AddressSanitizer, StrNCaseCmpOOBTest) { 1191 RunStrNCmpTest(&strncasecmp); 1192} 1193 1194TEST(AddressSanitizer, MemCmpOOBTest) { 1195 size_t size = Ident(100); 1196 char *s1 = MallocAndMemsetString(size); 1197 char *s2 = MallocAndMemsetString(size); 1198 // Normal memcmp calls. 1199 Ident(memcmp(s1, s2, size)); 1200 Ident(memcmp(s1 + size - 1, s2 + size - 1, 1)); 1201 Ident(memcmp(s1 - 1, s2 - 1, 0)); 1202 // One of arguments points to not allocated memory. 1203 EXPECT_DEATH(Ident(memcmp)(s1 - 1, s2, 1), LeftOOBErrorMessage(1)); 1204 EXPECT_DEATH(Ident(memcmp)(s1, s2 - 1, 1), LeftOOBErrorMessage(1)); 1205 EXPECT_DEATH(Ident(memcmp)(s1 + size, s2, 1), RightOOBErrorMessage(0)); 1206 EXPECT_DEATH(Ident(memcmp)(s1, s2 + size, 1), RightOOBErrorMessage(0)); 1207 // Hit unallocated memory and die. 1208 EXPECT_DEATH(Ident(memcmp)(s1 + 1, s2 + 1, size), RightOOBErrorMessage(0)); 1209 EXPECT_DEATH(Ident(memcmp)(s1 + size - 1, s2, 2), RightOOBErrorMessage(0)); 1210 // Zero bytes are not terminators and don't prevent from OOB. 1211 s1[size - 1] = '\0'; 1212 s2[size - 1] = '\0'; 1213 EXPECT_DEATH(Ident(memcmp)(s1, s2, size + 1), RightOOBErrorMessage(0)); 1214 free(s1); 1215 free(s2); 1216} 1217 1218TEST(AddressSanitizer, StrCatOOBTest) { 1219 size_t to_size = Ident(100); 1220 char *to = MallocAndMemsetString(to_size); 1221 to[0] = '\0'; 1222 size_t from_size = Ident(20); 1223 char *from = MallocAndMemsetString(from_size); 1224 from[from_size - 1] = '\0'; 1225 // Normal strcat calls. 1226 strcat(to, from); 1227 strcat(to, from); 1228 strcat(to + from_size, from + from_size - 2); 1229 // Catenate empty string is not always an error. 1230 strcat(to - 1, from + from_size - 1); 1231 // One of arguments points to not allocated memory. 1232 EXPECT_DEATH(strcat(to - 1, from), LeftOOBErrorMessage(1)); 1233 EXPECT_DEATH(strcat(to, from - 1), LeftOOBErrorMessage(1)); 1234 EXPECT_DEATH(strcat(to + to_size, from), RightOOBErrorMessage(0)); 1235 EXPECT_DEATH(strcat(to, from + from_size), RightOOBErrorMessage(0)); 1236 1237 // "from" is not zero-terminated. 1238 from[from_size - 1] = 'z'; 1239 EXPECT_DEATH(strcat(to, from), RightOOBErrorMessage(0)); 1240 from[from_size - 1] = '\0'; 1241 // "to" is not zero-terminated. 1242 memset(to, 'z', to_size); 1243 EXPECT_DEATH(strcat(to, from), RightOOBErrorMessage(0)); 1244 // "to" is too short to fit "from". 1245 to[to_size - from_size + 1] = '\0'; 1246 EXPECT_DEATH(strcat(to, from), RightOOBErrorMessage(0)); 1247 // length of "to" is just enough. 1248 strcat(to, from + 1); 1249 1250 free(to); 1251 free(from); 1252} 1253 1254TEST(AddressSanitizer, StrNCatOOBTest) { 1255 size_t to_size = Ident(100); 1256 char *to = MallocAndMemsetString(to_size); 1257 to[0] = '\0'; 1258 size_t from_size = Ident(20); 1259 char *from = MallocAndMemsetString(from_size); 1260 // Normal strncat calls. 1261 strncat(to, from, 0); 1262 strncat(to, from, from_size); 1263 from[from_size - 1] = '\0'; 1264 strncat(to, from, 2 * from_size); 1265 // Catenating empty string is not an error. 1266 strncat(to - 1, from, 0); 1267 strncat(to, from + from_size - 1, 10); 1268 // One of arguments points to not allocated memory. 1269 EXPECT_DEATH(strncat(to - 1, from, 2), LeftOOBErrorMessage(1)); 1270 EXPECT_DEATH(strncat(to, from - 1, 2), LeftOOBErrorMessage(1)); 1271 EXPECT_DEATH(strncat(to + to_size, from, 2), RightOOBErrorMessage(0)); 1272 EXPECT_DEATH(strncat(to, from + from_size, 2), RightOOBErrorMessage(0)); 1273 1274 memset(from, 'z', from_size); 1275 memset(to, 'z', to_size); 1276 to[0] = '\0'; 1277 // "from" is too short. 1278 EXPECT_DEATH(strncat(to, from, from_size + 1), RightOOBErrorMessage(0)); 1279 // "to" is not zero-terminated. 1280 EXPECT_DEATH(strncat(to + 1, from, 1), RightOOBErrorMessage(0)); 1281 // "to" is too short to fit "from". 1282 to[0] = 'z'; 1283 to[to_size - from_size + 1] = '\0'; 1284 EXPECT_DEATH(strncat(to, from, from_size - 1), RightOOBErrorMessage(0)); 1285 // "to" is just enough. 1286 strncat(to, from, from_size - 2); 1287 1288 free(to); 1289 free(from); 1290} 1291 1292static string OverlapErrorMessage(const string &func) { 1293 return func + "-param-overlap"; 1294} 1295 1296TEST(AddressSanitizer, StrArgsOverlapTest) { 1297 size_t size = Ident(100); 1298 char *str = Ident((char*)malloc(size)); 1299 1300// Do not check memcpy() on OS X 10.7 and later, where it actually aliases 1301// memmove(). 1302#if !defined(__APPLE__) || !defined(MAC_OS_X_VERSION_10_7) || \ 1303 (MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7) 1304 // Check "memcpy". Use Ident() to avoid inlining. 1305 memset(str, 'z', size); 1306 Ident(memcpy)(str + 1, str + 11, 10); 1307 Ident(memcpy)(str, str, 0); 1308 EXPECT_DEATH(Ident(memcpy)(str, str + 14, 15), OverlapErrorMessage("memcpy")); 1309 EXPECT_DEATH(Ident(memcpy)(str + 14, str, 15), OverlapErrorMessage("memcpy")); 1310#endif 1311 1312 // We do not treat memcpy with to==from as a bug. 1313 // See http://llvm.org/bugs/show_bug.cgi?id=11763. 1314 // EXPECT_DEATH(Ident(memcpy)(str + 20, str + 20, 1), 1315 // OverlapErrorMessage("memcpy")); 1316 1317 // Check "strcpy". 1318 memset(str, 'z', size); 1319 str[9] = '\0'; 1320 strcpy(str + 10, str); 1321 EXPECT_DEATH(strcpy(str + 9, str), OverlapErrorMessage("strcpy")); 1322 EXPECT_DEATH(strcpy(str, str + 4), OverlapErrorMessage("strcpy")); 1323 strcpy(str, str + 5); 1324 1325 // Check "strncpy". 1326 memset(str, 'z', size); 1327 strncpy(str, str + 10, 10); 1328 EXPECT_DEATH(strncpy(str, str + 9, 10), OverlapErrorMessage("strncpy")); 1329 EXPECT_DEATH(strncpy(str + 9, str, 10), OverlapErrorMessage("strncpy")); 1330 str[10] = '\0'; 1331 strncpy(str + 11, str, 20); 1332 EXPECT_DEATH(strncpy(str + 10, str, 20), OverlapErrorMessage("strncpy")); 1333 1334 // Check "strcat". 1335 memset(str, 'z', size); 1336 str[10] = '\0'; 1337 str[20] = '\0'; 1338 strcat(str, str + 10); 1339 strcat(str, str + 11); 1340 str[10] = '\0'; 1341 strcat(str + 11, str); 1342 EXPECT_DEATH(strcat(str, str + 9), OverlapErrorMessage("strcat")); 1343 EXPECT_DEATH(strcat(str + 9, str), OverlapErrorMessage("strcat")); 1344 EXPECT_DEATH(strcat(str + 10, str), OverlapErrorMessage("strcat")); 1345 1346 // Check "strncat". 1347 memset(str, 'z', size); 1348 str[10] = '\0'; 1349 strncat(str, str + 10, 10); // from is empty 1350 strncat(str, str + 11, 10); 1351 str[10] = '\0'; 1352 str[20] = '\0'; 1353 strncat(str + 5, str, 5); 1354 str[10] = '\0'; 1355 EXPECT_DEATH(strncat(str + 5, str, 6), OverlapErrorMessage("strncat")); 1356 EXPECT_DEATH(strncat(str, str + 9, 10), OverlapErrorMessage("strncat")); 1357 1358 free(str); 1359} 1360 1361void CallAtoi(const char *nptr) { 1362 Ident(atoi(nptr)); 1363} 1364void CallAtol(const char *nptr) { 1365 Ident(atol(nptr)); 1366} 1367void CallAtoll(const char *nptr) { 1368 Ident(atoll(nptr)); 1369} 1370typedef void(*PointerToCallAtoi)(const char*); 1371 1372void RunAtoiOOBTest(PointerToCallAtoi Atoi) { 1373 char *array = MallocAndMemsetString(10, '1'); 1374 // Invalid pointer to the string. 1375 EXPECT_DEATH(Atoi(array + 11), RightOOBErrorMessage(1)); 1376 EXPECT_DEATH(Atoi(array - 1), LeftOOBErrorMessage(1)); 1377 // Die if a buffer doesn't have terminating NULL. 1378 EXPECT_DEATH(Atoi(array), RightOOBErrorMessage(0)); 1379 // Make last symbol a terminating NULL or other non-digit. 1380 array[9] = '\0'; 1381 Atoi(array); 1382 array[9] = 'a'; 1383 Atoi(array); 1384 Atoi(array + 9); 1385 // Sometimes we need to detect overflow if no digits are found. 1386 memset(array, ' ', 10); 1387 EXPECT_DEATH(Atoi(array), RightOOBErrorMessage(0)); 1388 array[9] = '-'; 1389 EXPECT_DEATH(Atoi(array), RightOOBErrorMessage(0)); 1390 EXPECT_DEATH(Atoi(array + 9), RightOOBErrorMessage(0)); 1391 array[8] = '-'; 1392 Atoi(array); 1393 delete array; 1394} 1395 1396TEST(AddressSanitizer, AtoiAndFriendsOOBTest) { 1397 RunAtoiOOBTest(&CallAtoi); 1398 RunAtoiOOBTest(&CallAtol); 1399 RunAtoiOOBTest(&CallAtoll); 1400} 1401 1402void CallStrtol(const char *nptr, char **endptr, int base) { 1403 Ident(strtol(nptr, endptr, base)); 1404} 1405void CallStrtoll(const char *nptr, char **endptr, int base) { 1406 Ident(strtoll(nptr, endptr, base)); 1407} 1408typedef void(*PointerToCallStrtol)(const char*, char**, int); 1409 1410void RunStrtolOOBTest(PointerToCallStrtol Strtol) { 1411 char *array = MallocAndMemsetString(3); 1412 char *endptr = NULL; 1413 array[0] = '1'; 1414 array[1] = '2'; 1415 array[2] = '3'; 1416 // Invalid pointer to the string. 1417 EXPECT_DEATH(Strtol(array + 3, NULL, 0), RightOOBErrorMessage(0)); 1418 EXPECT_DEATH(Strtol(array - 1, NULL, 0), LeftOOBErrorMessage(1)); 1419 // Buffer overflow if there is no terminating null (depends on base). 1420 Strtol(array, &endptr, 3); 1421 EXPECT_EQ(array + 2, endptr); 1422 EXPECT_DEATH(Strtol(array, NULL, 0), RightOOBErrorMessage(0)); 1423 array[2] = 'z'; 1424 Strtol(array, &endptr, 35); 1425 EXPECT_EQ(array + 2, endptr); 1426 EXPECT_DEATH(Strtol(array, NULL, 36), RightOOBErrorMessage(0)); 1427 // Add terminating zero to get rid of overflow. 1428 array[2] = '\0'; 1429 Strtol(array, NULL, 36); 1430 // Don't check for overflow if base is invalid. 1431 Strtol(array - 1, NULL, -1); 1432 Strtol(array + 3, NULL, 1); 1433 // Sometimes we need to detect overflow if no digits are found. 1434 array[0] = array[1] = array[2] = ' '; 1435 EXPECT_DEATH(Strtol(array, NULL, 0), RightOOBErrorMessage(0)); 1436 array[2] = '+'; 1437 EXPECT_DEATH(Strtol(array, NULL, 0), RightOOBErrorMessage(0)); 1438 array[2] = '-'; 1439 EXPECT_DEATH(Strtol(array, NULL, 0), RightOOBErrorMessage(0)); 1440 array[1] = '+'; 1441 Strtol(array, NULL, 0); 1442 array[1] = array[2] = 'z'; 1443 Strtol(array, &endptr, 0); 1444 EXPECT_EQ(array, endptr); 1445 Strtol(array + 2, NULL, 0); 1446 EXPECT_EQ(array, endptr); 1447 delete array; 1448} 1449 1450TEST(AddressSanitizer, StrtollOOBTest) { 1451 RunStrtolOOBTest(&CallStrtoll); 1452} 1453TEST(AddressSanitizer, StrtolOOBTest) { 1454 RunStrtolOOBTest(&CallStrtol); 1455} 1456 1457// At the moment we instrument memcpy/memove/memset calls at compile time so we 1458// can't handle OOB error if these functions are called by pointer, see disabled 1459// MemIntrinsicCallByPointerTest below 1460typedef void*(*PointerToMemTransfer)(void*, const void*, size_t); 1461typedef void*(*PointerToMemSet)(void*, int, size_t); 1462 1463void CallMemSetByPointer(PointerToMemSet MemSet) { 1464 size_t size = Ident(100); 1465 char *array = Ident((char*)malloc(size)); 1466 EXPECT_DEATH(MemSet(array, 0, 101), RightOOBErrorMessage(0)); 1467 free(array); 1468} 1469 1470void CallMemTransferByPointer(PointerToMemTransfer MemTransfer) { 1471 size_t size = Ident(100); 1472 char *src = Ident((char*)malloc(size)); 1473 char *dst = Ident((char*)malloc(size)); 1474 EXPECT_DEATH(MemTransfer(dst, src, 101), RightOOBErrorMessage(0)); 1475 free(src); 1476 free(dst); 1477} 1478 1479TEST(AddressSanitizer, DISABLED_MemIntrinsicCallByPointerTest) { 1480 CallMemSetByPointer(&memset); 1481 CallMemTransferByPointer(&memcpy); 1482 CallMemTransferByPointer(&memmove); 1483} 1484 1485// This test case fails 1486// Clang optimizes memcpy/memset calls which lead to unaligned access 1487TEST(AddressSanitizer, DISABLED_MemIntrinsicUnalignedAccessTest) { 1488 int size = Ident(4096); 1489 char *s = Ident((char*)malloc(size)); 1490 EXPECT_DEATH(memset(s + size - 1, 0, 2), RightOOBErrorMessage(0)); 1491 free(s); 1492} 1493 1494// TODO(samsonov): Add a test with malloc(0) 1495// TODO(samsonov): Add tests for str* and mem* functions. 1496 1497NOINLINE static int LargeFunction(bool do_bad_access) { 1498 int *x = new int[100]; 1499 x[0]++; 1500 x[1]++; 1501 x[2]++; 1502 x[3]++; 1503 x[4]++; 1504 x[5]++; 1505 x[6]++; 1506 x[7]++; 1507 x[8]++; 1508 x[9]++; 1509 1510 x[do_bad_access ? 100 : 0]++; int res = __LINE__; 1511 1512 x[10]++; 1513 x[11]++; 1514 x[12]++; 1515 x[13]++; 1516 x[14]++; 1517 x[15]++; 1518 x[16]++; 1519 x[17]++; 1520 x[18]++; 1521 x[19]++; 1522 1523 delete x; 1524 return res; 1525} 1526 1527// Test the we have correct debug info for the failing instruction. 1528// This test requires the in-process symbolizer to be enabled by default. 1529TEST(AddressSanitizer, DISABLED_LargeFunctionSymbolizeTest) { 1530 int failing_line = LargeFunction(false); 1531 char expected_warning[128]; 1532 sprintf(expected_warning, "LargeFunction.*asan_test.cc:%d", failing_line); 1533 EXPECT_DEATH(LargeFunction(true), expected_warning); 1534} 1535 1536// Check that we unwind and symbolize correctly. 1537TEST(AddressSanitizer, DISABLED_MallocFreeUnwindAndSymbolizeTest) { 1538 int *a = (int*)malloc_aaa(sizeof(int)); 1539 *a = 1; 1540 free_aaa(a); 1541 EXPECT_DEATH(*a = 1, "free_ccc.*free_bbb.*free_aaa.*" 1542 "malloc_fff.*malloc_eee.*malloc_ddd"); 1543} 1544 1545void *ThreadedTestAlloc(void *a) { 1546 int **p = (int**)a; 1547 *p = new int; 1548 return 0; 1549} 1550 1551void *ThreadedTestFree(void *a) { 1552 int **p = (int**)a; 1553 delete *p; 1554 return 0; 1555} 1556 1557void *ThreadedTestUse(void *a) { 1558 int **p = (int**)a; 1559 **p = 1; 1560 return 0; 1561} 1562 1563void ThreadedTestSpawn() { 1564 pthread_t t; 1565 int *x; 1566 pthread_create(&t, 0, ThreadedTestAlloc, &x); 1567 pthread_join(t, 0); 1568 pthread_create(&t, 0, ThreadedTestFree, &x); 1569 pthread_join(t, 0); 1570 pthread_create(&t, 0, ThreadedTestUse, &x); 1571 pthread_join(t, 0); 1572} 1573 1574TEST(AddressSanitizer, ThreadedTest) { 1575 EXPECT_DEATH(ThreadedTestSpawn(), 1576 ASAN_PCRE_DOTALL 1577 "Thread T.*created" 1578 ".*Thread T.*created" 1579 ".*Thread T.*created"); 1580} 1581 1582#if ASAN_NEEDS_SEGV 1583TEST(AddressSanitizer, ShadowGapTest) { 1584#if __WORDSIZE == 32 1585 char *addr = (char*)0x22000000; 1586#else 1587 char *addr = (char*)0x0000100000080000; 1588#endif 1589 EXPECT_DEATH(*addr = 1, "AddressSanitizer crashed on unknown"); 1590} 1591#endif // ASAN_NEEDS_SEGV 1592 1593extern "C" { 1594NOINLINE static void UseThenFreeThenUse() { 1595 char *x = Ident((char*)malloc(8)); 1596 *x = 1; 1597 free_aaa(x); 1598 *x = 2; 1599} 1600} 1601 1602TEST(AddressSanitizer, UseThenFreeThenUseTest) { 1603 EXPECT_DEATH(UseThenFreeThenUse(), "freed by thread"); 1604} 1605 1606TEST(AddressSanitizer, StrDupTest) { 1607 free(strdup(Ident("123"))); 1608} 1609 1610// Currently we create and poison redzone at right of global variables. 1611char glob5[5]; 1612static char static110[110]; 1613const char ConstGlob[7] = {1, 2, 3, 4, 5, 6, 7}; 1614static const char StaticConstGlob[3] = {9, 8, 7}; 1615extern int GlobalsTest(int x); 1616 1617TEST(AddressSanitizer, GlobalTest) { 1618 static char func_static15[15]; 1619 1620 static char fs1[10]; 1621 static char fs2[10]; 1622 static char fs3[10]; 1623 1624 glob5[Ident(0)] = 0; 1625 glob5[Ident(1)] = 0; 1626 glob5[Ident(2)] = 0; 1627 glob5[Ident(3)] = 0; 1628 glob5[Ident(4)] = 0; 1629 1630 EXPECT_DEATH(glob5[Ident(5)] = 0, 1631 "0 bytes to the right of global variable.*glob5.* size 5"); 1632 EXPECT_DEATH(glob5[Ident(5+6)] = 0, 1633 "6 bytes to the right of global variable.*glob5.* size 5"); 1634 Ident(static110); // avoid optimizations 1635 static110[Ident(0)] = 0; 1636 static110[Ident(109)] = 0; 1637 EXPECT_DEATH(static110[Ident(110)] = 0, 1638 "0 bytes to the right of global variable"); 1639 EXPECT_DEATH(static110[Ident(110+7)] = 0, 1640 "7 bytes to the right of global variable"); 1641 1642 Ident(func_static15); // avoid optimizations 1643 func_static15[Ident(0)] = 0; 1644 EXPECT_DEATH(func_static15[Ident(15)] = 0, 1645 "0 bytes to the right of global variable"); 1646 EXPECT_DEATH(func_static15[Ident(15 + 9)] = 0, 1647 "9 bytes to the right of global variable"); 1648 1649 Ident(fs1); 1650 Ident(fs2); 1651 Ident(fs3); 1652 1653 // We don't create left redzones, so this is not 100% guaranteed to fail. 1654 // But most likely will. 1655 EXPECT_DEATH(fs2[Ident(-1)] = 0, "is located.*of global variable"); 1656 1657 EXPECT_DEATH(Ident(Ident(ConstGlob)[8]), 1658 "is located 1 bytes to the right of .*ConstGlob"); 1659 EXPECT_DEATH(Ident(Ident(StaticConstGlob)[5]), 1660 "is located 2 bytes to the right of .*StaticConstGlob"); 1661 1662 // call stuff from another file. 1663 GlobalsTest(0); 1664} 1665 1666TEST(AddressSanitizer, GlobalStringConstTest) { 1667 static const char *zoo = "FOOBAR123"; 1668 const char *p = Ident(zoo); 1669 EXPECT_DEATH(Ident(p[15]), "is ascii string 'FOOBAR123'"); 1670} 1671 1672TEST(AddressSanitizer, FileNameInGlobalReportTest) { 1673 static char zoo[10]; 1674 const char *p = Ident(zoo); 1675 // The file name should be present in the report. 1676 EXPECT_DEATH(Ident(p[15]), "zoo.*asan_test.cc"); 1677} 1678 1679int *ReturnsPointerToALocalObject() { 1680 int a = 0; 1681 return Ident(&a); 1682} 1683 1684#if ASAN_UAR == 1 1685TEST(AddressSanitizer, LocalReferenceReturnTest) { 1686 int *(*f)() = Ident(ReturnsPointerToALocalObject); 1687 int *p = f(); 1688 // Call 'f' a few more times, 'p' should still be poisoned. 1689 for (int i = 0; i < 32; i++) 1690 f(); 1691 EXPECT_DEATH(*p = 1, "AddressSanitizer stack-use-after-return"); 1692 EXPECT_DEATH(*p = 1, "is located.*in frame .*ReturnsPointerToALocal"); 1693} 1694#endif 1695 1696template <int kSize> 1697NOINLINE static void FuncWithStack() { 1698 char x[kSize]; 1699 Ident(x)[0] = 0; 1700 Ident(x)[kSize-1] = 0; 1701} 1702 1703static void LotsOfStackReuse() { 1704 int LargeStack[10000]; 1705 Ident(LargeStack)[0] = 0; 1706 for (int i = 0; i < 10000; i++) { 1707 FuncWithStack<128 * 1>(); 1708 FuncWithStack<128 * 2>(); 1709 FuncWithStack<128 * 4>(); 1710 FuncWithStack<128 * 8>(); 1711 FuncWithStack<128 * 16>(); 1712 FuncWithStack<128 * 32>(); 1713 FuncWithStack<128 * 64>(); 1714 FuncWithStack<128 * 128>(); 1715 FuncWithStack<128 * 256>(); 1716 FuncWithStack<128 * 512>(); 1717 Ident(LargeStack)[0] = 0; 1718 } 1719} 1720 1721TEST(AddressSanitizer, StressStackReuseTest) { 1722 LotsOfStackReuse(); 1723} 1724 1725TEST(AddressSanitizer, ThreadedStressStackReuseTest) { 1726 const int kNumThreads = 20; 1727 pthread_t t[kNumThreads]; 1728 for (int i = 0; i < kNumThreads; i++) { 1729 pthread_create(&t[i], 0, (void* (*)(void *x))LotsOfStackReuse, 0); 1730 } 1731 for (int i = 0; i < kNumThreads; i++) { 1732 pthread_join(t[i], 0); 1733 } 1734} 1735 1736static void *PthreadExit(void *a) { 1737 pthread_exit(0); 1738 return 0; 1739} 1740 1741TEST(AddressSanitizer, PthreadExitTest) { 1742 pthread_t t; 1743 for (int i = 0; i < 1000; i++) { 1744 pthread_create(&t, 0, PthreadExit, 0); 1745 pthread_join(t, 0); 1746 } 1747} 1748 1749#ifdef __EXCEPTIONS 1750NOINLINE static void StackReuseAndException() { 1751 int large_stack[1000]; 1752 Ident(large_stack); 1753 ASAN_THROW(1); 1754} 1755 1756// TODO(kcc): support exceptions with use-after-return. 1757TEST(AddressSanitizer, DISABLED_StressStackReuseAndExceptionsTest) { 1758 for (int i = 0; i < 10000; i++) { 1759 try { 1760 StackReuseAndException(); 1761 } catch(...) { 1762 } 1763 } 1764} 1765#endif 1766 1767TEST(AddressSanitizer, MlockTest) { 1768 EXPECT_EQ(0, mlockall(MCL_CURRENT)); 1769 EXPECT_EQ(0, mlock((void*)0x12345, 0x5678)); 1770 EXPECT_EQ(0, munlockall()); 1771 EXPECT_EQ(0, munlock((void*)0x987, 0x654)); 1772} 1773 1774struct LargeStruct { 1775 int foo[100]; 1776}; 1777 1778// Test for bug http://llvm.org/bugs/show_bug.cgi?id=11763. 1779// Struct copy should not cause asan warning even if lhs == rhs. 1780TEST(AddressSanitizer, LargeStructCopyTest) { 1781 LargeStruct a; 1782 *Ident(&a) = *Ident(&a); 1783} 1784 1785__attribute__((no_address_safety_analysis)) 1786static void NoAddressSafety() { 1787 char *foo = new char[10]; 1788 Ident(foo)[10] = 0; 1789 delete [] foo; 1790} 1791 1792TEST(AddressSanitizer, AttributeNoAddressSafetyTest) { 1793 Ident(NoAddressSafety)(); 1794} 1795 1796// ------------------ demo tests; run each one-by-one ------------- 1797// e.g. --gtest_filter=*DemoOOBLeftHigh --gtest_also_run_disabled_tests 1798TEST(AddressSanitizer, DISABLED_DemoThreadedTest) { 1799 ThreadedTestSpawn(); 1800} 1801 1802void *SimpleBugOnSTack(void *x = 0) { 1803 char a[20]; 1804 Ident(a)[20] = 0; 1805 return 0; 1806} 1807 1808TEST(AddressSanitizer, DISABLED_DemoStackTest) { 1809 SimpleBugOnSTack(); 1810} 1811 1812TEST(AddressSanitizer, DISABLED_DemoThreadStackTest) { 1813 pthread_t t; 1814 pthread_create(&t, 0, SimpleBugOnSTack, 0); 1815 pthread_join(t, 0); 1816} 1817 1818TEST(AddressSanitizer, DISABLED_DemoUAFLowIn) { 1819 uaf_test<U1>(10, 0); 1820} 1821TEST(AddressSanitizer, DISABLED_DemoUAFLowLeft) { 1822 uaf_test<U1>(10, -2); 1823} 1824TEST(AddressSanitizer, DISABLED_DemoUAFLowRight) { 1825 uaf_test<U1>(10, 10); 1826} 1827 1828TEST(AddressSanitizer, DISABLED_DemoUAFHigh) { 1829 uaf_test<U1>(kLargeMalloc, 0); 1830} 1831 1832TEST(AddressSanitizer, DISABLED_DemoOOBLeftLow) { 1833 oob_test<U1>(10, -1); 1834} 1835 1836TEST(AddressSanitizer, DISABLED_DemoOOBLeftHigh) { 1837 oob_test<U1>(kLargeMalloc, -1); 1838} 1839 1840TEST(AddressSanitizer, DISABLED_DemoOOBRightLow) { 1841 oob_test<U1>(10, 10); 1842} 1843 1844TEST(AddressSanitizer, DISABLED_DemoOOBRightHigh) { 1845 oob_test<U1>(kLargeMalloc, kLargeMalloc); 1846} 1847 1848TEST(AddressSanitizer, DISABLED_DemoOOM) { 1849 size_t size = __WORDSIZE == 64 ? (size_t)(1ULL << 40) : (0xf0000000); 1850 printf("%p\n", malloc(size)); 1851} 1852 1853TEST(AddressSanitizer, DISABLED_DemoDoubleFreeTest) { 1854 DoubleFree(); 1855} 1856 1857TEST(AddressSanitizer, DISABLED_DemoNullDerefTest) { 1858 int *a = 0; 1859 Ident(a)[10] = 0; 1860} 1861 1862TEST(AddressSanitizer, DISABLED_DemoFunctionStaticTest) { 1863 static char a[100]; 1864 static char b[100]; 1865 static char c[100]; 1866 Ident(a); 1867 Ident(b); 1868 Ident(c); 1869 Ident(a)[5] = 0; 1870 Ident(b)[105] = 0; 1871 Ident(a)[5] = 0; 1872} 1873 1874TEST(AddressSanitizer, DISABLED_DemoTooMuchMemoryTest) { 1875 const size_t kAllocSize = (1 << 28) - 1024; 1876 size_t total_size = 0; 1877 while (true) { 1878 char *x = (char*)malloc(kAllocSize); 1879 memset(x, 0, kAllocSize); 1880 total_size += kAllocSize; 1881 fprintf(stderr, "total: %ldM\n", (long)total_size >> 20); 1882 } 1883} 1884 1885// http://code.google.com/p/address-sanitizer/issues/detail?id=66 1886TEST(AddressSanitizer, BufferOverflowAfterManyFrees) { 1887 for (int i = 0; i < 1000000; i++) { 1888 delete [] (Ident(new char [8644])); 1889 } 1890 char *x = new char[8192]; 1891 EXPECT_DEATH(x[Ident(8192)] = 0, "AddressSanitizer heap-buffer-overflow"); 1892 delete [] Ident(x); 1893} 1894 1895#ifdef __APPLE__ 1896#include "asan_mac_test.h" 1897TEST(AddressSanitizerMac, CFAllocatorDefaultDoubleFree) { 1898 EXPECT_DEATH( 1899 CFAllocatorDefaultDoubleFree(NULL), 1900 "attempting double-free"); 1901} 1902 1903void CFAllocator_DoubleFreeOnPthread() { 1904 pthread_t child; 1905 pthread_create(&child, NULL, CFAllocatorDefaultDoubleFree, NULL); 1906 pthread_join(child, NULL); // Shouldn't be reached. 1907} 1908 1909TEST(AddressSanitizerMac, DISABLED_CFAllocatorDefaultDoubleFree_ChildPhread) { 1910 EXPECT_DEATH(CFAllocator_DoubleFreeOnPthread(), "attempting double-free"); 1911} 1912 1913// TODO(glider): figure out whether we still need these tests. Is it correct 1914// to intercept the non-default CFAllocators? 1915TEST(AddressSanitizerMac, DISABLED_CFAllocatorSystemDefaultDoubleFree) { 1916 EXPECT_DEATH( 1917 CFAllocatorSystemDefaultDoubleFree(), 1918 "attempting double-free"); 1919} 1920 1921// We're intercepting malloc, so kCFAllocatorMalloc is routed to ASan. 1922TEST(AddressSanitizerMac, CFAllocatorMallocDoubleFree) { 1923 EXPECT_DEATH(CFAllocatorMallocDoubleFree(), "attempting double-free"); 1924} 1925 1926TEST(AddressSanitizerMac, DISABLED_CFAllocatorMallocZoneDoubleFree) { 1927 EXPECT_DEATH(CFAllocatorMallocZoneDoubleFree(), "attempting double-free"); 1928} 1929 1930TEST(AddressSanitizerMac, GCDDispatchAsync) { 1931 // Make sure the whole ASan report is printed, i.e. that we don't die 1932 // on a CHECK. 1933 EXPECT_DEATH(TestGCDDispatchAsync(), "Shadow byte and word"); 1934} 1935 1936TEST(AddressSanitizerMac, GCDDispatchSync) { 1937 // Make sure the whole ASan report is printed, i.e. that we don't die 1938 // on a CHECK. 1939 EXPECT_DEATH(TestGCDDispatchSync(), "Shadow byte and word"); 1940} 1941 1942 1943TEST(AddressSanitizerMac, GCDReuseWqthreadsAsync) { 1944 // Make sure the whole ASan report is printed, i.e. that we don't die 1945 // on a CHECK. 1946 EXPECT_DEATH(TestGCDReuseWqthreadsAsync(), "Shadow byte and word"); 1947} 1948 1949TEST(AddressSanitizerMac, GCDReuseWqthreadsSync) { 1950 // Make sure the whole ASan report is printed, i.e. that we don't die 1951 // on a CHECK. 1952 EXPECT_DEATH(TestGCDReuseWqthreadsSync(), "Shadow byte and word"); 1953} 1954 1955TEST(AddressSanitizerMac, GCDDispatchAfter) { 1956 // Make sure the whole ASan report is printed, i.e. that we don't die 1957 // on a CHECK. 1958 EXPECT_DEATH(TestGCDDispatchAfter(), "Shadow byte and word"); 1959} 1960 1961TEST(AddressSanitizerMac, GCDSourceEvent) { 1962 // Make sure the whole ASan report is printed, i.e. that we don't die 1963 // on a CHECK. 1964 EXPECT_DEATH(TestGCDSourceEvent(), "Shadow byte and word"); 1965} 1966 1967TEST(AddressSanitizerMac, GCDSourceCancel) { 1968 // Make sure the whole ASan report is printed, i.e. that we don't die 1969 // on a CHECK. 1970 EXPECT_DEATH(TestGCDSourceCancel(), "Shadow byte and word"); 1971} 1972 1973TEST(AddressSanitizerMac, GCDGroupAsync) { 1974 // Make sure the whole ASan report is printed, i.e. that we don't die 1975 // on a CHECK. 1976 EXPECT_DEATH(TestGCDGroupAsync(), "Shadow byte and word"); 1977} 1978 1979void *MallocIntrospectionLockWorker(void *_) { 1980 const int kNumPointers = 100; 1981 int i; 1982 void *pointers[kNumPointers]; 1983 for (i = 0; i < kNumPointers; i++) { 1984 pointers[i] = malloc(i + 1); 1985 } 1986 for (i = 0; i < kNumPointers; i++) { 1987 free(pointers[i]); 1988 } 1989 1990 return NULL; 1991} 1992 1993void *MallocIntrospectionLockForker(void *_) { 1994 pid_t result = fork(); 1995 if (result == -1) { 1996 perror("fork"); 1997 } 1998 assert(result != -1); 1999 if (result == 0) { 2000 // Call malloc in the child process to make sure we won't deadlock. 2001 void *ptr = malloc(42); 2002 free(ptr); 2003 exit(0); 2004 } else { 2005 // Return in the parent process. 2006 return NULL; 2007 } 2008} 2009 2010TEST(AddressSanitizerMac, MallocIntrospectionLock) { 2011 // Incorrect implementation of force_lock and force_unlock in our malloc zone 2012 // will cause forked processes to deadlock. 2013 // TODO(glider): need to detect that none of the child processes deadlocked. 2014 const int kNumWorkers = 5, kNumIterations = 100; 2015 int i, iter; 2016 for (iter = 0; iter < kNumIterations; iter++) { 2017 pthread_t workers[kNumWorkers], forker; 2018 for (i = 0; i < kNumWorkers; i++) { 2019 pthread_create(&workers[i], 0, MallocIntrospectionLockWorker, 0); 2020 } 2021 pthread_create(&forker, 0, MallocIntrospectionLockForker, 0); 2022 for (i = 0; i < kNumWorkers; i++) { 2023 pthread_join(workers[i], 0); 2024 } 2025 pthread_join(forker, 0); 2026 } 2027} 2028 2029void *TSDAllocWorker(void *test_key) { 2030 if (test_key) { 2031 void *mem = malloc(10); 2032 pthread_setspecific(*(pthread_key_t*)test_key, mem); 2033 } 2034 return NULL; 2035} 2036 2037TEST(AddressSanitizerMac, DISABLED_TSDWorkqueueTest) { 2038 pthread_t th; 2039 pthread_key_t test_key; 2040 pthread_key_create(&test_key, CallFreeOnWorkqueue); 2041 pthread_create(&th, NULL, TSDAllocWorker, &test_key); 2042 pthread_join(th, NULL); 2043 pthread_key_delete(test_key); 2044} 2045 2046// Test that CFStringCreateCopy does not copy constant strings. 2047TEST(AddressSanitizerMac, CFStringCreateCopy) { 2048 CFStringRef str = CFSTR("Hello world!\n"); 2049 CFStringRef str2 = CFStringCreateCopy(0, str); 2050 EXPECT_EQ(str, str2); 2051} 2052 2053TEST(AddressSanitizerMac, NSObjectOOB) { 2054 // Make sure that our allocators are used for NSObjects. 2055 EXPECT_DEATH(TestOOBNSObjects(), "heap-buffer-overflow"); 2056} 2057 2058// Make sure that correct pointer is passed to free() when deallocating a 2059// NSURL object. 2060// See http://code.google.com/p/address-sanitizer/issues/detail?id=70. 2061TEST(AddressSanitizerMac, NSURLDeallocation) { 2062 TestNSURLDeallocation(); 2063} 2064#endif // __APPLE__ 2065 2066// Test that instrumentation of stack allocations takes into account 2067// AllocSize of a type, and not its StoreSize (16 vs 10 bytes for long double). 2068// See http://llvm.org/bugs/show_bug.cgi?id=12047 for more details. 2069TEST(AddressSanitizer, LongDoubleNegativeTest) { 2070 long double a, b; 2071 static long double c; 2072 memcpy(Ident(&a), Ident(&b), sizeof(long double)); 2073 memcpy(Ident(&c), Ident(&b), sizeof(long double)); 2074}; 2075 2076int main(int argc, char **argv) { 2077 progname = argv[0]; 2078 testing::GTEST_FLAG(death_test_style) = "threadsafe"; 2079 testing::InitGoogleTest(&argc, argv); 2080 return RUN_ALL_TESTS(); 2081} 2082