asan_test.cc revision c16201337a4bb974093ff75aa45682739a331d05
1//===-- asan_test.cc ------------*- C++ -*-===// 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 <pthread.h> 18#include <stdint.h> 19#include <setjmp.h> 20#include <assert.h> 21 22#if defined(__i386__) or defined(__x86_64__) 23#include <emmintrin.h> 24#endif 25 26#include "asan_test_config.h" 27#include "asan_test_utils.h" 28 29#ifndef __APPLE__ 30#include <malloc.h> 31#endif // __APPLE__ 32 33#ifdef __APPLE__ 34static bool APPLE = true; 35#else 36static bool APPLE = false; 37#endif 38 39#if ASAN_HAS_EXCEPTIONS 40# define ASAN_THROW(x) throw (x) 41#else 42# define ASAN_THROW(x) 43#endif 44 45#include <sys/mman.h> 46 47typedef uint8_t U1; 48typedef uint16_t U2; 49typedef uint32_t U4; 50typedef uint64_t U8; 51 52static const char *progname; 53static const int kPageSize = 4096; 54 55// Simple stand-alone pseudorandom number generator. 56// Current algorithm is ANSI C linear congruential PRNG. 57static inline uint32_t my_rand(uint32_t* state) { 58 return (*state = *state * 1103515245 + 12345) >> 16; 59} 60 61static uint32_t global_seed = 0; 62 63class ObjdumpOfMyself { 64 public: 65 explicit ObjdumpOfMyself(const string &binary) { 66 is_correct = true; 67 string objdump_name = APPLE ? "gobjdump" : "objdump"; 68 string prog = objdump_name + " -d " + binary; 69 // TODO(glider): popen() succeeds even if the file does not exist. 70 FILE *pipe = popen(prog.c_str(), "r"); 71 string objdump; 72 if (pipe) { 73 const int kBuffSize = 4096; 74 char buff[kBuffSize+1]; 75 int read_bytes; 76 while ((read_bytes = fread(buff, 1, kBuffSize, pipe)) > 0) { 77 buff[read_bytes] = 0; 78 objdump.append(buff); 79 } 80 pclose(pipe); 81 } else { 82 is_correct = false; 83 } 84 // cut the objdump into functions 85 string fn, next_fn; 86 size_t next_start; 87 for (size_t start = fn_start(objdump, 0, &fn); 88 start != string::npos; 89 start = next_start, fn = next_fn) { 90 next_start = fn_start(objdump, start, &next_fn); 91 // fprintf(stderr, "start: %d next_start = %d fn: %s\n", 92 // (int)start, (int)next_start, fn.c_str()); 93 // Mac OS adds the "_" prefix to function names. 94 if (fn.find(APPLE ? "_Disasm" : "Disasm") == string::npos) { 95 continue; 96 } 97 string fn_body = objdump.substr(start, next_start - start); 98 // fprintf(stderr, "%s:\n%s", fn.c_str(), fn_body.c_str()); 99 functions_[fn] = fn_body; 100 } 101 } 102 103 string &GetFuncDisasm(const string &fn) { 104 return functions_[fn]; 105 } 106 107 int CountInsnInFunc(const string &fn, const vector<string> &insns) { 108 // Mac OS adds the "_" prefix to function names. 109 string fn_ref = APPLE ? "_" + fn : fn; 110 const string &disasm = GetFuncDisasm(fn_ref); 111 if (disasm.empty()) return -1; 112 size_t counter = 0; 113 for (size_t i = 0; i < insns.size(); i++) { 114 size_t pos = 0; 115 while ((pos = disasm.find(insns[i], pos)) != string::npos) { 116 counter++; 117 pos++; 118 } 119 } 120 return counter; 121 } 122 123 bool IsCorrect() { return is_correct; } 124 125 private: 126 size_t fn_start(const string &objdump, size_t start_pos, string *fn) { 127 size_t pos = objdump.find(">:\n", start_pos); 128 if (pos == string::npos) 129 return string::npos; 130 size_t beg = pos; 131 while (beg > 0 && objdump[beg - 1] != '<') 132 beg--; 133 *fn = objdump.substr(beg, pos - beg); 134 return pos + 3; 135 } 136 137 map<string, string> functions_; 138 bool is_correct; 139}; 140 141static ObjdumpOfMyself *objdump_of_myself() { 142 static ObjdumpOfMyself *o = new ObjdumpOfMyself(progname); 143 return o; 144} 145 146const size_t kLargeMalloc = 1 << 24; 147 148template<class T> 149__attribute__((noinline)) 150void asan_write(T *a) { 151 *a = 0; 152} 153 154__attribute__((noinline)) 155void asan_write_sized_aligned(uint8_t *p, size_t size) { 156 EXPECT_EQ(0, ((uintptr_t)p % size)); 157 if (size == 1) asan_write((uint8_t*)p); 158 else if (size == 2) asan_write((uint16_t*)p); 159 else if (size == 4) asan_write((uint32_t*)p); 160 else if (size == 8) asan_write((uint64_t*)p); 161} 162 163__attribute__((noinline)) void *malloc_fff(size_t size) { 164 void *res = malloc/**/(size); break_optimization(0); return res;} 165__attribute__((noinline)) void *malloc_eee(size_t size) { 166 void *res = malloc_fff(size); break_optimization(0); return res;} 167__attribute__((noinline)) void *malloc_ddd(size_t size) { 168 void *res = malloc_eee(size); break_optimization(0); return res;} 169__attribute__((noinline)) void *malloc_ccc(size_t size) { 170 void *res = malloc_ddd(size); break_optimization(0); return res;} 171__attribute__((noinline)) void *malloc_bbb(size_t size) { 172 void *res = malloc_ccc(size); break_optimization(0); return res;} 173__attribute__((noinline)) void *malloc_aaa(size_t size) { 174 void *res = malloc_bbb(size); break_optimization(0); return res;} 175 176#ifndef __APPLE__ 177__attribute__((noinline)) void *memalign_fff(size_t alignment, size_t size) { 178 void *res = memalign/**/(alignment, size); break_optimization(0); return res;} 179__attribute__((noinline)) void *memalign_eee(size_t alignment, size_t size) { 180 void *res = memalign_fff(alignment, size); break_optimization(0); return res;} 181__attribute__((noinline)) void *memalign_ddd(size_t alignment, size_t size) { 182 void *res = memalign_eee(alignment, size); break_optimization(0); return res;} 183__attribute__((noinline)) void *memalign_ccc(size_t alignment, size_t size) { 184 void *res = memalign_ddd(alignment, size); break_optimization(0); return res;} 185__attribute__((noinline)) void *memalign_bbb(size_t alignment, size_t size) { 186 void *res = memalign_ccc(alignment, size); break_optimization(0); return res;} 187__attribute__((noinline)) void *memalign_aaa(size_t alignment, size_t size) { 188 void *res = memalign_bbb(alignment, size); break_optimization(0); return res;} 189#endif // __APPLE__ 190 191 192__attribute__((noinline)) 193 void free_ccc(void *p) { free(p); break_optimization(0);} 194__attribute__((noinline)) 195 void free_bbb(void *p) { free_ccc(p); break_optimization(0);} 196__attribute__((noinline)) 197 void free_aaa(void *p) { free_bbb(p); break_optimization(0);} 198 199template<class T> 200__attribute__((noinline)) 201void oob_test(int size, int off) { 202 char *p = (char*)malloc_aaa(size); 203 // fprintf(stderr, "writing %d byte(s) into [%p,%p) with offset %d\n", 204 // sizeof(T), p, p + size, off); 205 asan_write((T*)(p + off)); 206 free_aaa(p); 207} 208 209 210template<class T> 211__attribute__((noinline)) 212void uaf_test(int size, int off) { 213 char *p = (char *)malloc_aaa(size); 214 free_aaa(p); 215 for (int i = 1; i < 100; i++) 216 free_aaa(malloc_aaa(i)); 217 fprintf(stderr, "writing %ld byte(s) at %p with offset %d\n", 218 (long)sizeof(T), p, off); 219 asan_write((T*)(p + off)); 220} 221 222TEST(AddressSanitizer, ADDRESS_SANITIZER_MacroTest) { 223 EXPECT_EQ(1, ADDRESS_SANITIZER); 224} 225 226TEST(AddressSanitizer, SimpleDeathTest) { 227 EXPECT_DEATH(exit(1), ""); 228} 229 230TEST(AddressSanitizer, VariousMallocsTest) { 231 // fprintf(stderr, "malloc:\n"); 232 int *a = (int*)malloc(100 * sizeof(int)); 233 a[50] = 0; 234 free(a); 235 236 // fprintf(stderr, "realloc:\n"); 237 int *r = (int*)malloc(10); 238 r = (int*)realloc(r, 2000 * sizeof(int)); 239 r[1000] = 0; 240 free(r); 241 242 // fprintf(stderr, "operator new []\n"); 243 int *b = new int[100]; 244 b[50] = 0; 245 delete [] b; 246 247 // fprintf(stderr, "operator new\n"); 248 int *c = new int; 249 *c = 0; 250 delete c; 251 252#ifndef __APPLE__ 253 // cfree 254 cfree(Ident(malloc(1))); 255 256 // fprintf(stderr, "posix_memalign\n"); 257 int *pm; 258 int pm_res = posix_memalign((void**)&pm, kPageSize, kPageSize); 259 EXPECT_EQ(0, pm_res); 260 free(pm); 261 262 int *ma = (int*)memalign(kPageSize, kPageSize); 263 EXPECT_EQ(0, (uintptr_t)ma % kPageSize); 264 ma[123] = 0; 265 free(ma); 266#endif // __APPLE__ 267} 268 269TEST(AddressSanitizer, CallocTest) { 270 int *a = (int*)calloc(100, sizeof(int)); 271 EXPECT_EQ(0, a[10]); 272 free(a); 273} 274 275TEST(AddressSanitizer, VallocTest) { 276 void *a = valloc(100); 277 EXPECT_EQ(0, (uintptr_t)a % kPageSize); 278 free(a); 279} 280 281#ifndef __APPLE__ 282TEST(AddressSanitizer, PvallocTest) { 283 char *a = (char*)pvalloc(kPageSize + 100); 284 EXPECT_EQ(0, (uintptr_t)a % kPageSize); 285 a[kPageSize + 101] = 1; // we should not report an error here. 286 free(a); 287 288 a = (char*)pvalloc(0); // pvalloc(0) should allocate at least one page. 289 EXPECT_EQ(0, (uintptr_t)a % kPageSize); 290 a[101] = 1; // we should not report an error here. 291 free(a); 292} 293#endif // __APPLE__ 294 295void NoOpSignalHandler(int unused) { 296 fprintf(stderr, "NoOpSignalHandler (should not happen). Aborting\n"); 297 abort(); 298} 299 300void NoOpSigaction(int, siginfo_t *siginfo, void *context) { 301 fprintf(stderr, "NoOpSigaction (should not happen). Aborting\n"); 302 abort(); 303} 304 305TEST(AddressSanitizer, SignalTest) { 306 signal(SIGSEGV, NoOpSignalHandler); 307 signal(SIGILL, NoOpSignalHandler); 308 // If asan did not intercept sigaction NoOpSigaction will fire. 309 char *x = Ident((char*)malloc(5)); 310 EXPECT_DEATH(x[6]++, "is located 1 bytes to the right"); 311 free(Ident(x)); 312} 313 314TEST(AddressSanitizer, SigactionTest) { 315 { 316 struct sigaction sigact; 317 memset(&sigact, 0, sizeof(sigact)); 318 sigact.sa_sigaction = NoOpSigaction;; 319 sigact.sa_flags = SA_SIGINFO; 320 sigaction(SIGSEGV, &sigact, 0); 321 } 322 323 { 324 struct sigaction sigact; 325 memset(&sigact, 0, sizeof(sigact)); 326 sigact.sa_sigaction = NoOpSigaction;; 327 sigact.sa_flags = SA_SIGINFO; 328 sigaction(SIGILL, &sigact, 0); 329 } 330 331 // If asan did not intercept sigaction NoOpSigaction will fire. 332 char *x = Ident((char*)malloc(5)); 333 EXPECT_DEATH(x[6]++, "is located 1 bytes to the right"); 334 free(Ident(x)); 335} 336 337void *TSDWorker(void *test_key) { 338 if (test_key) { 339 pthread_setspecific(*(pthread_key_t*)test_key, (void*)0xfeedface); 340 } 341 return NULL; 342} 343 344void TSDDestructor(void *tsd) { 345 // Spawning a thread will check that the current thread id is not -1. 346 pthread_t th; 347 pthread_create(&th, NULL, TSDWorker, NULL); 348 pthread_join(th, NULL); 349} 350 351// This tests triggers the thread-specific data destruction fiasco which occurs 352// if we don't manage the TSD destructors ourselves. We create a new pthread 353// key with a non-NULL destructor which is likely to be put after the destructor 354// of AsanThread in the list of destructors. 355// In this case the TSD for AsanThread will be destroyed before TSDDestructor 356// is called for the child thread, and a CHECK will fail when we call 357// pthread_create() to spawn the grandchild. 358TEST(AddressSanitizer, DISABLED_TSDTest) { 359 pthread_t th; 360 pthread_key_t test_key; 361 pthread_key_create(&test_key, TSDDestructor); 362 pthread_create(&th, NULL, TSDWorker, &test_key); 363 pthread_join(th, NULL); 364 pthread_key_delete(test_key); 365} 366 367template<class T> 368void OOBTest() { 369 char expected_str[100]; 370 for (int size = sizeof(T); size < 20; size += 5) { 371 for (int i = -5; i < 0; i++) { 372 const char *str = 373 "is located.*%d byte.*to the left"; 374 sprintf(expected_str, str, abs(i)); 375 EXPECT_DEATH(oob_test<T>(size, i), expected_str); 376 } 377 378 for (int i = 0; i < size - sizeof(T) + 1; i++) 379 oob_test<T>(size, i); 380 381 for (int i = size - sizeof(T) + 1; i <= size + 3 * sizeof(T); i++) { 382 const char *str = 383 "is located.*%d byte.*to the right"; 384 int off = i >= size ? (i - size) : 0; 385 // we don't catch unaligned partially OOB accesses. 386 if (i % sizeof(T)) continue; 387 sprintf(expected_str, str, off); 388 EXPECT_DEATH(oob_test<T>(size, i), expected_str); 389 } 390 } 391 392 EXPECT_DEATH(oob_test<T>(kLargeMalloc, -1), 393 "is located.*1 byte.*to the left"); 394 EXPECT_DEATH(oob_test<T>(kLargeMalloc, kLargeMalloc), 395 "is located.*0 byte.*to the right"); 396} 397 398// TODO(glider): the following tests are EXTREMELY slow on Darwin: 399// AddressSanitizer.OOB_char (125503 ms) 400// AddressSanitizer.OOB_int (126890 ms) 401// AddressSanitizer.OOBRightTest (315605 ms) 402// AddressSanitizer.SimpleStackTest (366559 ms) 403 404TEST(AddressSanitizer, OOB_char) { 405 OOBTest<U1>(); 406} 407 408TEST(AddressSanitizer, OOB_int) { 409 OOBTest<U4>(); 410} 411 412TEST(AddressSanitizer, OOBRightTest) { 413 for (size_t access_size = 1; access_size <= 8; access_size *= 2) { 414 for (size_t alloc_size = 1; alloc_size <= 8; alloc_size++) { 415 for (size_t offset = 0; offset <= 8; offset += access_size) { 416 void *p = malloc(alloc_size); 417 // allocated: [p, p + alloc_size) 418 // accessed: [p + offset, p + offset + access_size) 419 uint8_t *addr = (uint8_t*)p + offset; 420 if (offset + access_size <= alloc_size) { 421 asan_write_sized_aligned(addr, access_size); 422 } else { 423 int outside_bytes = offset > alloc_size ? (offset - alloc_size) : 0; 424 const char *str = 425 "is located.%d *byte.*to the right"; 426 char expected_str[100]; 427 sprintf(expected_str, str, outside_bytes); 428 EXPECT_DEATH(asan_write_sized_aligned(addr, access_size), 429 expected_str); 430 } 431 free(p); 432 } 433 } 434 } 435} 436 437TEST(AddressSanitizer, UAF_char) { 438 const char *uaf_string = "AddressSanitizer.*heap-use-after-free"; 439 EXPECT_DEATH(uaf_test<U1>(1, 0), uaf_string); 440 EXPECT_DEATH(uaf_test<U1>(10, 0), uaf_string); 441 EXPECT_DEATH(uaf_test<U1>(10, 10), uaf_string); 442 EXPECT_DEATH(uaf_test<U1>(kLargeMalloc, 0), uaf_string); 443 EXPECT_DEATH(uaf_test<U1>(kLargeMalloc, kLargeMalloc / 2), uaf_string); 444} 445 446#if ASAN_HAS_BLACKLIST 447TEST(AddressSanitizer, IgnoreTest) { 448 int *x = Ident(new int); 449 delete Ident(x); 450 *x = 0; 451} 452#endif // ASAN_HAS_BLACKLIST 453 454struct StructWithBitField { 455 int bf1:1; 456 int bf2:1; 457 int bf3:1; 458 int bf4:29; 459}; 460 461TEST(AddressSanitizer, BitFieldPositiveTest) { 462 StructWithBitField *x = new StructWithBitField; 463 delete Ident(x); 464 EXPECT_DEATH(x->bf1 = 0, "use-after-free"); 465 EXPECT_DEATH(x->bf2 = 0, "use-after-free"); 466 EXPECT_DEATH(x->bf3 = 0, "use-after-free"); 467 EXPECT_DEATH(x->bf4 = 0, "use-after-free"); 468}; 469 470struct StructWithBitFields_8_24 { 471 int a:8; 472 int b:24; 473}; 474 475TEST(AddressSanitizer, BitFieldNegativeTest) { 476 StructWithBitFields_8_24 *x = Ident(new StructWithBitFields_8_24); 477 x->a = 0; 478 x->b = 0; 479 delete Ident(x); 480} 481 482TEST(AddressSanitizer, OutOfMemoryTest) { 483 size_t size = __WORDSIZE == 64 ? (size_t)(1ULL << 48) : (0xf0000000); 484 EXPECT_EQ(0, realloc(0, size)); 485 EXPECT_EQ(0, realloc(0, ~Ident(0))); 486 EXPECT_EQ(0, malloc(size)); 487 EXPECT_EQ(0, malloc(~Ident(0))); 488 EXPECT_EQ(0, calloc(1, size)); 489 EXPECT_EQ(0, calloc(1, ~Ident(0))); 490} 491 492#if ASAN_NEEDS_SEGV 493TEST(AddressSanitizer, WildAddressTest) { 494 char *c = (char*)0x123; 495 EXPECT_DEATH(*c = 0, "AddressSanitizer crashed on unknown address"); 496} 497#endif 498 499static void MallocStress(size_t n) { 500 uint32_t seed = my_rand(&global_seed); 501 for (size_t iter = 0; iter < 10; iter++) { 502 vector<void *> vec; 503 for (size_t i = 0; i < n; i++) { 504 if ((i % 3) == 0) { 505 if (vec.empty()) continue; 506 size_t idx = my_rand(&seed) % vec.size(); 507 void *ptr = vec[idx]; 508 vec[idx] = vec.back(); 509 vec.pop_back(); 510 free_aaa(ptr); 511 } else { 512 size_t size = my_rand(&seed) % 1000 + 1; 513#ifndef __APPLE__ 514 size_t alignment = 1 << (my_rand(&seed) % 7 + 3); 515 char *ptr = (char*)memalign_aaa(alignment, size); 516#else 517 char *ptr = (char*) malloc_aaa(size); 518#endif 519 vec.push_back(ptr); 520 ptr[0] = 0; 521 ptr[size-1] = 0; 522 ptr[size/2] = 0; 523 } 524 } 525 for (size_t i = 0; i < vec.size(); i++) 526 free_aaa(vec[i]); 527 } 528} 529 530TEST(AddressSanitizer, MallocStressTest) { 531 MallocStress(200000); 532} 533 534static void TestLargeMalloc(size_t size) { 535 char buff[1024]; 536 sprintf(buff, "is located 1 bytes to the left of %lu-byte", (long)size); 537 EXPECT_DEATH(Ident((char*)malloc(size))[-1] = 0, buff); 538} 539 540TEST(AddressSanitizer, LargeMallocTest) { 541 for (int i = 113; i < (1 << 28); i = i * 2 + 13) { 542 TestLargeMalloc(i); 543 } 544} 545 546TEST(AddressSanitizer, HugeMallocTest) { 547#ifdef __APPLE__ 548 // It was empirically found out that 1215 megabytes is the maximum amount of 549 // memory available to the process under AddressSanitizer on Darwin. 550 // (the libSystem malloc() allows allocating up to 2300 megabytes without 551 // ASan). 552 size_t n_megs = __WORDSIZE == 32 ? 1200 : 4100; 553#else 554 size_t n_megs = __WORDSIZE == 32 ? 2600 : 4100; 555#endif 556 TestLargeMalloc(n_megs << 20); 557} 558 559TEST(AddressSanitizer, ThreadedMallocStressTest) { 560 const int kNumThreads = 4; 561 pthread_t t[kNumThreads]; 562 for (int i = 0; i < kNumThreads; i++) { 563 pthread_create(&t[i], 0, (void* (*)(void *x))MallocStress, (void*)100000); 564 } 565 for (int i = 0; i < kNumThreads; i++) { 566 pthread_join(t[i], 0); 567 } 568} 569 570void *ManyThreadsWorker(void *a) { 571 for (int iter = 0; iter < 100; iter++) { 572 for (size_t size = 100; size < 2000; size *= 2) { 573 free(Ident(malloc(size))); 574 } 575 } 576 return 0; 577} 578 579TEST(AddressSanitizer, ManyThreadsTest) { 580 const size_t kNumThreads = __WORDSIZE == 32 ? 30 : 1000; 581 pthread_t t[kNumThreads]; 582 for (size_t i = 0; i < kNumThreads; i++) { 583 pthread_create(&t[i], 0, (void* (*)(void *x))ManyThreadsWorker, (void*)i); 584 } 585 for (size_t i = 0; i < kNumThreads; i++) { 586 pthread_join(t[i], 0); 587 } 588} 589 590TEST(AddressSanitizer, ReallocTest) { 591 const int kMinElem = 5; 592 int *ptr = (int*)malloc(sizeof(int) * kMinElem); 593 ptr[3] = 3; 594 for (int i = 0; i < 10000; i++) { 595 ptr = (int*)realloc(ptr, 596 (my_rand(&global_seed) % 1000 + kMinElem) * sizeof(int)); 597 EXPECT_EQ(3, ptr[3]); 598 } 599} 600 601void WrongFree() { 602 int *x = (int*)malloc(100 * sizeof(int)); 603 // Use the allocated memory, otherwise Clang will optimize it out. 604 Ident(x); 605 free(x + 1); 606} 607 608TEST(AddressSanitizer, WrongFreeTest) { 609 EXPECT_DEATH(WrongFree(), 610 "ERROR: AddressSanitizer attempting free.*not malloc"); 611} 612 613void DoubleFree() { 614 int *x = (int*)malloc(100 * sizeof(int)); 615 fprintf(stderr, "DoubleFree: x=%p\n", x); 616 free(x); 617 free(x); 618 fprintf(stderr, "should have failed in the second free(%p)\n", x); 619 abort(); 620} 621 622TEST(AddressSanitizer, DoubleFreeTest) { 623 EXPECT_DEATH(DoubleFree(), "ERROR: AddressSanitizer attempting double-free"); 624} 625 626template<int kSize> 627__attribute__((noinline)) 628void SizedStackTest() { 629 char a[kSize]; 630 char *A = Ident((char*)&a); 631 for (size_t i = 0; i < kSize; i++) 632 A[i] = i; 633 EXPECT_DEATH(A[-1] = 0, ""); 634 EXPECT_DEATH(A[-20] = 0, ""); 635 EXPECT_DEATH(A[-31] = 0, ""); 636 EXPECT_DEATH(A[kSize] = 0, ""); 637 EXPECT_DEATH(A[kSize + 1] = 0, ""); 638 EXPECT_DEATH(A[kSize + 10] = 0, ""); 639 EXPECT_DEATH(A[kSize + 31] = 0, ""); 640} 641 642TEST(AddressSanitizer, SimpleStackTest) { 643 SizedStackTest<1>(); 644 SizedStackTest<2>(); 645 SizedStackTest<3>(); 646 SizedStackTest<4>(); 647 SizedStackTest<5>(); 648 SizedStackTest<6>(); 649 SizedStackTest<7>(); 650 SizedStackTest<16>(); 651 SizedStackTest<25>(); 652 SizedStackTest<34>(); 653 SizedStackTest<43>(); 654 SizedStackTest<51>(); 655 SizedStackTest<62>(); 656 SizedStackTest<64>(); 657 SizedStackTest<128>(); 658} 659 660TEST(AddressSanitizer, ManyStackObjectsTest) { 661 char XXX[10]; 662 char YYY[20]; 663 char ZZZ[30]; 664 Ident(XXX); 665 Ident(YYY); 666 EXPECT_DEATH(Ident(ZZZ)[-1] = 0, ASAN_PCRE_DOTALL "XXX.*YYY.*ZZZ"); 667} 668 669__attribute__((noinline)) 670static void Frame0(int frame, char *a, char *b, char *c) { 671 char d[4] = {0}; 672 char *D = Ident(d); 673 switch (frame) { 674 case 3: a[5]++; break; 675 case 2: b[5]++; break; 676 case 1: c[5]++; break; 677 case 0: D[5]++; break; 678 } 679} 680__attribute__((noinline)) static void Frame1(int frame, char *a, char *b) { 681 char c[4] = {0}; Frame0(frame, a, b, c); 682 break_optimization(0); 683} 684__attribute__((noinline)) static void Frame2(int frame, char *a) { 685 char b[4] = {0}; Frame1(frame, a, b); 686 break_optimization(0); 687} 688__attribute__((noinline)) static void Frame3(int frame) { 689 char a[4] = {0}; Frame2(frame, a); 690 break_optimization(0); 691} 692 693TEST(AddressSanitizer, GuiltyStackFrame0Test) { 694 EXPECT_DEATH(Frame3(0), "located .*in frame <.*Frame0"); 695} 696TEST(AddressSanitizer, GuiltyStackFrame1Test) { 697 EXPECT_DEATH(Frame3(1), "located .*in frame <.*Frame1"); 698} 699TEST(AddressSanitizer, GuiltyStackFrame2Test) { 700 EXPECT_DEATH(Frame3(2), "located .*in frame <.*Frame2"); 701} 702TEST(AddressSanitizer, GuiltyStackFrame3Test) { 703 EXPECT_DEATH(Frame3(3), "located .*in frame <.*Frame3"); 704} 705 706__attribute__((noinline)) 707void LongJmpFunc1(jmp_buf buf) { 708 // create three red zones for these two stack objects. 709 int a; 710 int b; 711 712 int *A = Ident(&a); 713 int *B = Ident(&b); 714 *A = *B; 715 longjmp(buf, 1); 716} 717 718__attribute__((noinline)) 719void UnderscopeLongJmpFunc1(jmp_buf buf) { 720 // create three red zones for these two stack objects. 721 int a; 722 int b; 723 724 int *A = Ident(&a); 725 int *B = Ident(&b); 726 *A = *B; 727 _longjmp(buf, 1); 728} 729 730__attribute__((noinline)) 731void SigLongJmpFunc1(sigjmp_buf buf) { 732 // create three red zones for these two stack objects. 733 int a; 734 int b; 735 736 int *A = Ident(&a); 737 int *B = Ident(&b); 738 *A = *B; 739 siglongjmp(buf, 1); 740} 741 742 743__attribute__((noinline)) 744void TouchStackFunc() { 745 int a[100]; // long array will intersect with redzones from LongJmpFunc1. 746 int *A = Ident(a); 747 for (int i = 0; i < 100; i++) 748 A[i] = i*i; 749} 750 751// Test that we handle longjmp and do not report fals positives on stack. 752TEST(AddressSanitizer, LongJmpTest) { 753 static jmp_buf buf; 754 if (!setjmp(buf)) { 755 LongJmpFunc1(buf); 756 } else { 757 TouchStackFunc(); 758 } 759} 760 761TEST(AddressSanitizer, UnderscopeLongJmpTest) { 762 static jmp_buf buf; 763 if (!_setjmp(buf)) { 764 UnderscopeLongJmpFunc1(buf); 765 } else { 766 TouchStackFunc(); 767 } 768} 769 770TEST(AddressSanitizer, SigLongJmpTest) { 771 static sigjmp_buf buf; 772 if (!sigsetjmp(buf, 1)) { 773 SigLongJmpFunc1(buf); 774 } else { 775 TouchStackFunc(); 776 } 777} 778 779#ifdef __EXCEPTIONS 780__attribute__((noinline)) 781void ThrowFunc() { 782 // create three red zones for these two stack objects. 783 int a; 784 int b; 785 786 int *A = Ident(&a); 787 int *B = Ident(&b); 788 *A = *B; 789 ASAN_THROW(1); 790} 791 792TEST(AddressSanitizer, CxxExceptionTest) { 793 if (ASAN_UAR) return; 794 // TODO(kcc): this test crashes on 32-bit for some reason... 795 if (__WORDSIZE == 32) return; 796 try { 797 ThrowFunc(); 798 } catch(...) {} 799 TouchStackFunc(); 800} 801#endif 802 803void *ThreadStackReuseFunc1(void *unused) { 804 // create three red zones for these two stack objects. 805 int a; 806 int b; 807 808 int *A = Ident(&a); 809 int *B = Ident(&b); 810 *A = *B; 811 pthread_exit(0); 812 return 0; 813} 814 815void *ThreadStackReuseFunc2(void *unused) { 816 TouchStackFunc(); 817 return 0; 818} 819 820TEST(AddressSanitizer, ThreadStackReuseTest) { 821 pthread_t t; 822 pthread_create(&t, 0, ThreadStackReuseFunc1, 0); 823 pthread_join(t, 0); 824 pthread_create(&t, 0, ThreadStackReuseFunc2, 0); 825 pthread_join(t, 0); 826} 827 828#if defined(__i386__) or defined(__x86_64__) 829TEST(AddressSanitizer, Store128Test) { 830 char *a = Ident((char*)malloc(Ident(12))); 831 char *p = a; 832 if (((uintptr_t)a % 16) != 0) 833 p = a + 8; 834 assert(((uintptr_t)p % 16) == 0); 835 __m128i value_wide = _mm_set1_epi16(0x1234); 836 EXPECT_DEATH(_mm_store_si128((__m128i*)p, value_wide), 837 "AddressSanitizer heap-buffer-overflow"); 838 EXPECT_DEATH(_mm_store_si128((__m128i*)p, value_wide), 839 "WRITE of size 16"); 840 EXPECT_DEATH(_mm_store_si128((__m128i*)p, value_wide), 841 "located 0 bytes to the right of 12-byte"); 842 free(a); 843} 844#endif 845 846static string RightOOBErrorMessage(int oob_distance) { 847 assert(oob_distance >= 0); 848 char expected_str[100]; 849 sprintf(expected_str, "located %d bytes to the right", oob_distance); 850 return string(expected_str); 851} 852 853static string LeftOOBErrorMessage(int oob_distance) { 854 assert(oob_distance > 0); 855 char expected_str[100]; 856 sprintf(expected_str, "located %d bytes to the left", oob_distance); 857 return string(expected_str); 858} 859 860template<class T> 861void MemSetOOBTestTemplate(size_t length) { 862 if (length == 0) return; 863 size_t size = Ident(sizeof(T) * length); 864 T *array = Ident((T*)malloc(size)); 865 int element = Ident(42); 866 int zero = Ident(0); 867 // memset interval inside array 868 memset(array, element, size); 869 memset(array, element, size - 1); 870 memset(array + length - 1, element, sizeof(T)); 871 memset(array, element, 1); 872 873 // memset 0 bytes 874 memset(array - 10, element, zero); 875 memset(array - 1, element, zero); 876 memset(array, element, zero); 877 memset(array + length, 0, zero); 878 memset(array + length + 1, 0, zero); 879 880 // try to memset bytes to the right of array 881 EXPECT_DEATH(memset(array, 0, size + 1), 882 RightOOBErrorMessage(0)); 883 EXPECT_DEATH(memset((char*)(array + length) - 1, element, 6), 884 RightOOBErrorMessage(4)); 885 EXPECT_DEATH(memset(array + 1, element, size + sizeof(T)), 886 RightOOBErrorMessage(2 * sizeof(T) - 1)); 887 // whole interval is to the right 888 EXPECT_DEATH(memset(array + length + 1, 0, 10), 889 RightOOBErrorMessage(sizeof(T))); 890 891 // try to memset bytes to the left of array 892 EXPECT_DEATH(memset((char*)array - 1, element, size), 893 LeftOOBErrorMessage(1)); 894 EXPECT_DEATH(memset((char*)array - 5, 0, 6), 895 LeftOOBErrorMessage(5)); 896 EXPECT_DEATH(memset(array - 5, element, size + 5 * sizeof(T)), 897 LeftOOBErrorMessage(5 * sizeof(T))); 898 // whole interval is to the left 899 EXPECT_DEATH(memset(array - 2, 0, sizeof(T)), 900 LeftOOBErrorMessage(2 * sizeof(T))); 901 902 // try to memset bytes both to the left & to the right 903 EXPECT_DEATH(memset((char*)array - 2, element, size + 4), 904 LeftOOBErrorMessage(2)); 905 906 free(array); 907} 908 909TEST(AddressSanitizer, MemSetOOBTest) { 910 MemSetOOBTestTemplate<char>(100); 911 MemSetOOBTestTemplate<int>(5); 912 MemSetOOBTestTemplate<double>(256); 913 // We can test arrays of structres/classes here, but what for? 914} 915 916// Same test for memcpy and memmove functions 917template <class T, class M> 918void MemTransferOOBTestTemplate(size_t length) { 919 if (length == 0) return; 920 size_t size = Ident(sizeof(T) * length); 921 T *src = Ident((T*)malloc(size)); 922 T *dest = Ident((T*)malloc(size)); 923 int zero = Ident(0); 924 925 // valid transfer of bytes between arrays 926 M::transfer(dest, src, size); 927 M::transfer(dest + 1, src, size - sizeof(T)); 928 M::transfer(dest, src + length - 1, sizeof(T)); 929 M::transfer(dest, src, 1); 930 931 // transfer zero bytes 932 M::transfer(dest - 1, src, 0); 933 M::transfer(dest + length, src, zero); 934 M::transfer(dest, src - 1, zero); 935 M::transfer(dest, src, zero); 936 937 // try to change mem to the right of dest 938 EXPECT_DEATH(M::transfer(dest + 1, src, size), 939 RightOOBErrorMessage(sizeof(T) - 1)); 940 EXPECT_DEATH(M::transfer((char*)(dest + length) - 1, src, 5), 941 RightOOBErrorMessage(3)); 942 943 // try to change mem to the left of dest 944 EXPECT_DEATH(M::transfer(dest - 2, src, size), 945 LeftOOBErrorMessage(2 * sizeof(T))); 946 EXPECT_DEATH(M::transfer((char*)dest - 3, src, 4), 947 LeftOOBErrorMessage(3)); 948 949 // try to access mem to the right of src 950 EXPECT_DEATH(M::transfer(dest, src + 2, size), 951 RightOOBErrorMessage(2 * sizeof(T) - 1)); 952 EXPECT_DEATH(M::transfer(dest, (char*)(src + length) - 3, 6), 953 RightOOBErrorMessage(2)); 954 955 // try to access mem to the left of src 956 EXPECT_DEATH(M::transfer(dest, src - 1, size), 957 LeftOOBErrorMessage(sizeof(T))); 958 EXPECT_DEATH(M::transfer(dest, (char*)src - 6, 7), 959 LeftOOBErrorMessage(6)); 960 961 // Generally we don't need to test cases where both accessing src and writing 962 // to dest address to poisoned memory. 963 964 T *big_src = Ident((T*)malloc(size * 2)); 965 T *big_dest = Ident((T*)malloc(size * 2)); 966 // try to change mem to both sides of dest 967 EXPECT_DEATH(M::transfer(dest - 1, big_src, size * 2), 968 LeftOOBErrorMessage(sizeof(T))); 969 // try to access mem to both sides of src 970 EXPECT_DEATH(M::transfer(big_dest, src - 2, size * 2), 971 LeftOOBErrorMessage(2 * sizeof(T))); 972 973 free(src); 974 free(dest); 975 free(big_src); 976 free(big_dest); 977} 978 979class MemCpyWrapper { 980 public: 981 static void* transfer(void *to, const void *from, size_t size) { 982 return memcpy(to, from, size); 983 } 984}; 985TEST(AddressSanitizer, MemCpyOOBTest) { 986 MemTransferOOBTestTemplate<char, MemCpyWrapper>(100); 987 MemTransferOOBTestTemplate<int, MemCpyWrapper>(1024); 988} 989 990class MemMoveWrapper { 991 public: 992 static void* transfer(void *to, const void *from, size_t size) { 993 return memmove(to, from, size); 994 } 995}; 996TEST(AddressSanitizer, MemMoveOOBTest) { 997 MemTransferOOBTestTemplate<char, MemMoveWrapper>(100); 998 MemTransferOOBTestTemplate<int, MemMoveWrapper>(1024); 999} 1000 1001// Tests for string functions 1002 1003// Used for string functions tests 1004static char global_string[] = "global"; 1005static size_t global_string_length = 6; 1006 1007// Input to a test is a zero-terminated string str with given length 1008// Accesses to the bytes to the left and to the right of str 1009// are presumed to produce OOB errors 1010void StrLenOOBTestTemplate(char *str, size_t length, bool is_global) { 1011 // Normal strlen calls 1012 EXPECT_EQ(strlen(str), length); 1013 if (length > 0) { 1014 EXPECT_EQ(strlen(str + 1), length - 1); 1015 EXPECT_EQ(strlen(str + length), 0); 1016 } 1017 // Arg of strlen is not malloced, OOB access 1018 if (!is_global) { 1019 // We don't insert RedZones to the left of global variables 1020 EXPECT_DEATH(Ident(strlen(str - 1)), LeftOOBErrorMessage(1)); 1021 EXPECT_DEATH(Ident(strlen(str - 5)), LeftOOBErrorMessage(5)); 1022 } 1023 EXPECT_DEATH(Ident(strlen(str + length + 1)), RightOOBErrorMessage(0)); 1024 // Overwrite terminator 1025 str[length] = 'a'; 1026 // String is not zero-terminated, strlen will lead to OOB access 1027 EXPECT_DEATH(Ident(strlen(str)), RightOOBErrorMessage(0)); 1028 EXPECT_DEATH(Ident(strlen(str + length)), RightOOBErrorMessage(0)); 1029 // Restore terminator 1030 str[length] = 0; 1031} 1032TEST(AddressSanitizer, StrLenOOBTest) { 1033 // Check heap-allocated string 1034 size_t length = Ident(10); 1035 char *heap_string = Ident((char*)malloc(length + 1)); 1036 char stack_string[10 + 1]; 1037 for (int i = 0; i < length; i++) { 1038 heap_string[i] = 'a'; 1039 stack_string[i] = 'b'; 1040 } 1041 heap_string[length] = 0; 1042 stack_string[length] = 0; 1043 StrLenOOBTestTemplate(heap_string, length, false); 1044 // TODO(samsonov): Fix expected messages in StrLenOOBTestTemplate to 1045 // make test for stack_string work. Or move it to output tests. 1046 // StrLenOOBTestTemplate(stack_string, length, false); 1047 StrLenOOBTestTemplate(global_string, global_string_length, true); 1048 free(heap_string); 1049} 1050 1051#ifndef __APPLE__ 1052TEST(AddressSanitizer, StrNLenOOBTest) { 1053 size_t size = Ident(123); 1054 char *str = Ident((char*)malloc(size)); 1055 memset(str, 'z', size); 1056 // Normal strnlen calls. 1057 Ident(strnlen(str - 1, 0)); 1058 Ident(strnlen(str, size)); 1059 Ident(strnlen(str + size - 1, 1)); 1060 str[size - 1] = '\0'; 1061 Ident(strnlen(str, 2 * size)); 1062 // Argument points to not allocated memory. 1063 EXPECT_DEATH(Ident(strnlen(str - 1, 1)), LeftOOBErrorMessage(1)); 1064 EXPECT_DEATH(Ident(strnlen(str + size, 1)), RightOOBErrorMessage(0)); 1065 // Overwrite the terminating '\0' and hit unallocated memory. 1066 str[size - 1] = 'z'; 1067 EXPECT_DEATH(Ident(strnlen(str, size + 1)), RightOOBErrorMessage(0)); 1068 free(str); 1069} 1070#endif 1071 1072TEST(AddressSanitizer, StrDupOOBTest) { 1073 size_t size = Ident(42); 1074 char *str = Ident((char*)malloc(size)); 1075 char *new_str; 1076 memset(str, 'z', size); 1077 // Normal strdup calls. 1078 str[size - 1] = '\0'; 1079 new_str = strdup(str); 1080 free(new_str); 1081 new_str = strdup(str + size - 1); 1082 free(new_str); 1083 // Argument points to not allocated memory. 1084 EXPECT_DEATH(Ident(strdup(str - 1)), LeftOOBErrorMessage(1)); 1085 EXPECT_DEATH(Ident(strdup(str + size)), RightOOBErrorMessage(0)); 1086 // Overwrite the terminating '\0' and hit unallocated memory. 1087 str[size - 1] = 'z'; 1088 EXPECT_DEATH(Ident(strdup(str)), RightOOBErrorMessage(0)); 1089 free(str); 1090} 1091 1092TEST(AddressSanitizer, StrCpyOOBTest) { 1093 size_t to_size = Ident(30); 1094 size_t from_size = Ident(6); // less than to_size 1095 char *to = Ident((char*)malloc(to_size)); 1096 char *from = Ident((char*)malloc(from_size)); 1097 // Normal strcpy calls. 1098 strcpy(from, "hello"); 1099 strcpy(to, from); 1100 strcpy(to + to_size - from_size, from); 1101 // Length of "from" is too small. 1102 EXPECT_DEATH(Ident(strcpy(from, "hello2")), RightOOBErrorMessage(0)); 1103 // "to" or "from" points to not allocated memory. 1104 EXPECT_DEATH(Ident(strcpy(to - 1, from)), LeftOOBErrorMessage(1)); 1105 EXPECT_DEATH(Ident(strcpy(to, from - 1)), LeftOOBErrorMessage(1)); 1106 EXPECT_DEATH(Ident(strcpy(to, from + from_size)), RightOOBErrorMessage(0)); 1107 EXPECT_DEATH(Ident(strcpy(to + to_size, from)), RightOOBErrorMessage(0)); 1108 // Overwrite the terminating '\0' character and hit unallocated memory. 1109 from[from_size - 1] = '!'; 1110 EXPECT_DEATH(Ident(strcpy(to, from)), RightOOBErrorMessage(0)); 1111 free(to); 1112 free(from); 1113} 1114 1115TEST(AddressSanitizer, StrNCpyOOBTest) { 1116 size_t to_size = Ident(20); 1117 size_t from_size = Ident(6); // less than to_size 1118 char *to = Ident((char*)malloc(to_size)); 1119 // From is a zero-terminated string "hello\0" of length 6 1120 char *from = Ident((char*)malloc(from_size)); 1121 strcpy(from, "hello"); 1122 // copy 0 bytes 1123 strncpy(to, from, 0); 1124 strncpy(to - 1, from - 1, 0); 1125 // normal strncpy calls 1126 strncpy(to, from, from_size); 1127 strncpy(to, from, to_size); 1128 strncpy(to, from + from_size - 1, to_size); 1129 strncpy(to + to_size - 1, from, 1); 1130 // One of {to, from} points to not allocated memory 1131 EXPECT_DEATH(Ident(strncpy(to, from - 1, from_size)), 1132 LeftOOBErrorMessage(1)); 1133 EXPECT_DEATH(Ident(strncpy(to - 1, from, from_size)), 1134 LeftOOBErrorMessage(1)); 1135 EXPECT_DEATH(Ident(strncpy(to, from + from_size, 1)), 1136 RightOOBErrorMessage(0)); 1137 EXPECT_DEATH(Ident(strncpy(to + to_size, from, 1)), 1138 RightOOBErrorMessage(0)); 1139 // Length of "to" is too small 1140 EXPECT_DEATH(Ident(strncpy(to + to_size - from_size + 1, from, from_size)), 1141 RightOOBErrorMessage(0)); 1142 EXPECT_DEATH(Ident(strncpy(to + 1, from, to_size)), 1143 RightOOBErrorMessage(0)); 1144 // Overwrite terminator in from 1145 from[from_size - 1] = '!'; 1146 // normal strncpy call 1147 strncpy(to, from, from_size); 1148 // Length of "from" is too small 1149 EXPECT_DEATH(Ident(strncpy(to, from, to_size)), 1150 RightOOBErrorMessage(0)); 1151 free(to); 1152 free(from); 1153} 1154 1155typedef char*(*PointerToStrChr)(const char*, int); 1156void RunStrChrTest(PointerToStrChr StrChr) { 1157 size_t size = Ident(100); 1158 char *str = Ident((char*)malloc(size)); 1159 memset(str, 'z', size); 1160 str[10] = 'q'; 1161 str[11] = '\0'; 1162 EXPECT_EQ(str, StrChr(str, 'z')); 1163 EXPECT_EQ(str + 10, StrChr(str, 'q')); 1164 EXPECT_EQ(NULL, StrChr(str, 'a')); 1165 // StrChr argument points to not allocated memory. 1166 EXPECT_DEATH(Ident(StrChr(str - 1, 'z')), LeftOOBErrorMessage(1)); 1167 EXPECT_DEATH(Ident(StrChr(str + size, 'z')), RightOOBErrorMessage(0)); 1168 // Overwrite the terminator and hit not allocated memory. 1169 str[11] = 'z'; 1170 EXPECT_DEATH(Ident(StrChr(str, 'a')), RightOOBErrorMessage(0)); 1171 free(str); 1172} 1173TEST(AddressSanitizer, StrChrAndIndexOOBTest) { 1174 RunStrChrTest(&strchr); 1175 RunStrChrTest(&index); 1176} 1177 1178TEST(AddressSanitizer, StrCmpAndFriendsLogicTest) { 1179 // strcmp 1180 EXPECT_EQ(0, strcmp("", "")); 1181 EXPECT_EQ(0, strcmp("abcd", "abcd")); 1182 EXPECT_EQ(-1, strcmp("ab", "ac")); 1183 EXPECT_EQ(-1, strcmp("abc", "abcd")); 1184 EXPECT_EQ(1, strcmp("acc", "abc")); 1185 EXPECT_EQ(1, strcmp("abcd", "abc")); 1186 1187 // strncmp 1188 EXPECT_EQ(0, strncmp("a", "b", 0)); 1189 EXPECT_EQ(0, strncmp("abcd", "abcd", 10)); 1190 EXPECT_EQ(0, strncmp("abcd", "abcef", 3)); 1191 EXPECT_EQ(-1, strncmp("abcde", "abcfa", 4)); 1192 EXPECT_EQ(-1, strncmp("a", "b", 5)); 1193 EXPECT_EQ(-1, strncmp("bc", "bcde", 4)); 1194 EXPECT_EQ(1, strncmp("xyz", "xyy", 10)); 1195 EXPECT_EQ(1, strncmp("baa", "aaa", 1)); 1196 EXPECT_EQ(1, strncmp("zyx", "", 2)); 1197} 1198 1199static inline char* MallocAndMemsetString(size_t size) { 1200 char *s = Ident((char*)malloc(size)); 1201 memset(s, 'z', size); 1202 return s; 1203} 1204 1205TEST(AddressSanitizer, StrCmpOOBTest) { 1206 size_t size = Ident(100); 1207 char *s1 = MallocAndMemsetString(size); 1208 char *s2 = MallocAndMemsetString(size); 1209 s1[size - 1] = '\0'; 1210 s2[size - 1] = '\0'; 1211 // Normal strcmp calls 1212 Ident(strcmp(s1, s2)); 1213 Ident(strcmp(s1, s2 + size - 1)); 1214 Ident(strcmp(s1 + size - 1, s2 + size - 1)); 1215 s1[size - 1] = 'z'; 1216 s2[size - 1] = 'x'; 1217 Ident(strcmp(s1, s2)); 1218 // One of arguments points to not allocated memory. 1219 EXPECT_DEATH(Ident(strcmp)(s1 - 1, s2), LeftOOBErrorMessage(1)); 1220 EXPECT_DEATH(Ident(strcmp)(s1, s2 - 1), LeftOOBErrorMessage(1)); 1221 EXPECT_DEATH(Ident(strcmp)(s1 + size, s2), RightOOBErrorMessage(0)); 1222 EXPECT_DEATH(Ident(strcmp)(s1, s2 + size), RightOOBErrorMessage(0)); 1223 // Hit unallocated memory and die. 1224 s2[size - 1] = 'z'; 1225 EXPECT_DEATH(Ident(strcmp)(s1, s1), RightOOBErrorMessage(0)); 1226 EXPECT_DEATH(Ident(strcmp)(s1 + size - 1, s2), RightOOBErrorMessage(0)); 1227 free(s1); 1228 free(s2); 1229} 1230 1231TEST(AddressSanitizer, StrNCmpOOBTest) { 1232 size_t size = Ident(100); 1233 char *s1 = MallocAndMemsetString(size); 1234 char *s2 = MallocAndMemsetString(size); 1235 s1[size - 1] = '\0'; 1236 s2[size - 1] = '\0'; 1237 // Normal strncmp calls 1238 Ident(strncmp(s1, s2, size + 2)); 1239 s1[size - 1] = 'z'; 1240 s2[size - 1] = 'x'; 1241 Ident(strncmp(s1 + size - 2, s2 + size - 2, size)); 1242 s2[size - 1] = 'z'; 1243 Ident(strncmp(s1 - 1, s2 - 1, 0)); 1244 Ident(strncmp(s1 + size - 1, s2 + size - 1, 1)); 1245 // One of arguments points to not allocated memory. 1246 EXPECT_DEATH(Ident(strncmp)(s1 - 1, s2, 1), LeftOOBErrorMessage(1)); 1247 EXPECT_DEATH(Ident(strncmp)(s1, s2 - 1, 1), LeftOOBErrorMessage(1)); 1248 EXPECT_DEATH(Ident(strncmp)(s1 + size, s2, 1), RightOOBErrorMessage(0)); 1249 EXPECT_DEATH(Ident(strncmp)(s1, s2 + size, 1), RightOOBErrorMessage(0)); 1250 // Hit unallocated memory and die. 1251 EXPECT_DEATH(Ident(strncmp)(s1 + 1, s2 + 1, size), RightOOBErrorMessage(0)); 1252 EXPECT_DEATH(Ident(strncmp)(s1 + size - 1, s2, 2), RightOOBErrorMessage(0)); 1253 free(s1); 1254 free(s2); 1255} 1256 1257static const char *kOverlapErrorMessage = "strcpy-param-overlap"; 1258 1259TEST(AddressSanitizer, StrArgsOverlapTest) { 1260 size_t size = Ident(100); 1261 char *str = Ident((char*)malloc(size)); 1262 1263#if 0 1264 // Check "memcpy". Use Ident() to avoid inlining. 1265 memset(str, 'z', size); 1266 Ident(memcpy)(str + 1, str + 11, 10); 1267 Ident(memcpy)(str, str, 0); 1268 EXPECT_DEATH(Ident(memcpy)(str, str + 14, 15), kOverlapErrorMessage); 1269 EXPECT_DEATH(Ident(memcpy)(str + 14, str, 15), kOverlapErrorMessage); 1270 EXPECT_DEATH(Ident(memcpy)(str + 20, str + 20, 1), kOverlapErrorMessage); 1271#endif 1272 1273 // Check "strcpy". 1274 memset(str, 'z', size); 1275 str[9] = '\0'; 1276 strcpy(str + 10, str); 1277 EXPECT_DEATH(strcpy(str + 9, str), kOverlapErrorMessage); 1278 EXPECT_DEATH(strcpy(str, str + 4), kOverlapErrorMessage); 1279 strcpy(str, str + 5); 1280 1281 // Check "strncpy". 1282 memset(str, 'z', size); 1283 strncpy(str, str + 10, 10); 1284 EXPECT_DEATH(strncpy(str, str + 9, 10), kOverlapErrorMessage); 1285 EXPECT_DEATH(strncpy(str + 9, str, 10), kOverlapErrorMessage); 1286 str[10] = '\0'; 1287 strncpy(str + 11, str, 20); 1288 EXPECT_DEATH(strncpy(str + 10, str, 20), kOverlapErrorMessage); 1289 1290 free(str); 1291} 1292 1293// At the moment we instrument memcpy/memove/memset calls at compile time so we 1294// can't handle OOB error if these functions are called by pointer, see disabled 1295// MemIntrinsicCallByPointerTest below 1296typedef void*(*PointerToMemTransfer)(void*, const void*, size_t); 1297typedef void*(*PointerToMemSet)(void*, int, size_t); 1298 1299void CallMemSetByPointer(PointerToMemSet MemSet) { 1300 size_t size = Ident(100); 1301 char *array = Ident((char*)malloc(size)); 1302 EXPECT_DEATH(MemSet(array, 0, 101), RightOOBErrorMessage(0)); 1303 free(array); 1304} 1305 1306void CallMemTransferByPointer(PointerToMemTransfer MemTransfer) { 1307 size_t size = Ident(100); 1308 char *src = Ident((char*)malloc(size)); 1309 char *dst = Ident((char*)malloc(size)); 1310 EXPECT_DEATH(MemTransfer(dst, src, 101), RightOOBErrorMessage(0)); 1311 free(src); 1312 free(dst); 1313} 1314 1315TEST(AddressSanitizer, DISABLED_MemIntrinsicCallByPointerTest) { 1316 CallMemSetByPointer(&memset); 1317 CallMemTransferByPointer(&memcpy); 1318 CallMemTransferByPointer(&memmove); 1319} 1320 1321// This test case fails 1322// Clang optimizes memcpy/memset calls which lead to unaligned access 1323TEST(AddressSanitizer, DISABLED_MemIntrinsicUnalignedAccessTest) { 1324 int size = Ident(4096); 1325 char *s = Ident((char*)malloc(size)); 1326 EXPECT_DEATH(memset(s + size - 1, 0, 2), RightOOBErrorMessage(0)); 1327 free(s); 1328} 1329 1330// TODO(samsonov): Add a test with malloc(0) 1331// TODO(samsonov): Add tests for str* and mem* functions. 1332 1333__attribute__((noinline)) 1334static int LargeFunction(bool do_bad_access) { 1335 int *x = new int[100]; 1336 x[0]++; 1337 x[1]++; 1338 x[2]++; 1339 x[3]++; 1340 x[4]++; 1341 x[5]++; 1342 x[6]++; 1343 x[7]++; 1344 x[8]++; 1345 x[9]++; 1346 1347 x[do_bad_access ? 100 : 0]++; int res = __LINE__; 1348 1349 x[10]++; 1350 x[11]++; 1351 x[12]++; 1352 x[13]++; 1353 x[14]++; 1354 x[15]++; 1355 x[16]++; 1356 x[17]++; 1357 x[18]++; 1358 x[19]++; 1359 1360 delete x; 1361 return res; 1362} 1363 1364// Test the we have correct debug info for the failing instruction. 1365// This test requires the in-process symbolizer to be enabled by default. 1366TEST(AddressSanitizer, DISABLED_LargeFunctionSymbolizeTest) { 1367 int failing_line = LargeFunction(false); 1368 char expected_warning[128]; 1369 sprintf(expected_warning, "LargeFunction.*asan_test.cc:%d", failing_line); 1370 EXPECT_DEATH(LargeFunction(true), expected_warning); 1371} 1372 1373// Check that we unwind and symbolize correctly. 1374TEST(AddressSanitizer, DISABLED_MallocFreeUnwindAndSymbolizeTest) { 1375 int *a = (int*)malloc_aaa(sizeof(int)); 1376 *a = 1; 1377 free_aaa(a); 1378 EXPECT_DEATH(*a = 1, "free_ccc.*free_bbb.*free_aaa.*" 1379 "malloc_fff.*malloc_eee.*malloc_ddd"); 1380} 1381 1382void *ThreadedTestAlloc(void *a) { 1383 int **p = (int**)a; 1384 *p = new int; 1385 return 0; 1386} 1387 1388void *ThreadedTestFree(void *a) { 1389 int **p = (int**)a; 1390 delete *p; 1391 return 0; 1392} 1393 1394void *ThreadedTestUse(void *a) { 1395 int **p = (int**)a; 1396 **p = 1; 1397 return 0; 1398} 1399 1400void ThreadedTestSpawn() { 1401 pthread_t t; 1402 int *x; 1403 pthread_create(&t, 0, ThreadedTestAlloc, &x); 1404 pthread_join(t, 0); 1405 pthread_create(&t, 0, ThreadedTestFree, &x); 1406 pthread_join(t, 0); 1407 pthread_create(&t, 0, ThreadedTestUse, &x); 1408 pthread_join(t, 0); 1409} 1410 1411TEST(AddressSanitizer, ThreadedTest) { 1412 EXPECT_DEATH(ThreadedTestSpawn(), 1413 ASAN_PCRE_DOTALL 1414 "Thread T.*created" 1415 ".*Thread T.*created" 1416 ".*Thread T.*created"); 1417} 1418 1419#if ASAN_NEEDS_SEGV 1420TEST(AddressSanitizer, ShadowGapTest) { 1421#if __WORDSIZE == 32 1422 char *addr = (char*)0x22000000; 1423#else 1424 char *addr = (char*)0x0000100000080000; 1425#endif 1426 EXPECT_DEATH(*addr = 1, "AddressSanitizer crashed on unknown"); 1427} 1428#endif // ASAN_NEEDS_SEGV 1429 1430extern "C" { 1431__attribute__((noinline)) 1432static void UseThenFreeThenUse() { 1433 char *x = Ident((char*)malloc(8)); 1434 *x = 1; 1435 free_aaa(x); 1436 *x = 2; 1437} 1438} 1439 1440TEST(AddressSanitizer, UseThenFreeThenUseTest) { 1441 EXPECT_DEATH(UseThenFreeThenUse(), "freed by thread"); 1442} 1443 1444TEST(AddressSanitizer, StrDupTest) { 1445 free(strdup(Ident("123"))); 1446} 1447 1448TEST(AddressSanitizer, ObjdumpTest) { 1449 ObjdumpOfMyself *o = objdump_of_myself(); 1450 EXPECT_TRUE(o->IsCorrect()); 1451} 1452 1453extern "C" { 1454__attribute__((noinline)) 1455static void DisasmSimple() { 1456 Ident(0); 1457} 1458 1459__attribute__((noinline)) 1460static void DisasmParamWrite(int *a) { 1461 *a = 1; 1462} 1463 1464__attribute__((noinline)) 1465static void DisasmParamInc(int *a) { 1466 (*a)++; 1467} 1468 1469__attribute__((noinline)) 1470static void DisasmParamReadIfWrite(int *a) { 1471 if (*a) 1472 *a = 1; 1473} 1474 1475__attribute__((noinline)) 1476static int DisasmParamIfReadWrite(int *a, int cond) { 1477 int res = 0; 1478 if (cond) 1479 res = *a; 1480 *a = 0; 1481 return res; 1482} 1483 1484static int GLOBAL; 1485 1486__attribute__((noinline)) 1487static void DisasmWriteGlob() { 1488 GLOBAL = 1; 1489} 1490} // extern "C" 1491 1492TEST(AddressSanitizer, DisasmTest) { 1493 int a; 1494 DisasmSimple(); 1495 DisasmParamWrite(&a); 1496 DisasmParamInc(&a); 1497 Ident(DisasmWriteGlob)(); 1498 DisasmParamReadIfWrite(&a); 1499 1500 a = 7; 1501 EXPECT_EQ(7, DisasmParamIfReadWrite(&a, Ident(1))); 1502 EXPECT_EQ(0, a); 1503 1504 ObjdumpOfMyself *o = objdump_of_myself(); 1505 vector<string> insns; 1506 insns.push_back("ud2"); 1507 insns.push_back("__asan_report_"); 1508 EXPECT_EQ(0, o->CountInsnInFunc("DisasmSimple", insns)); 1509 EXPECT_EQ(1, o->CountInsnInFunc("DisasmParamWrite", insns)); 1510 EXPECT_EQ(1, o->CountInsnInFunc("DisasmParamInc", insns)); 1511 EXPECT_EQ(0, o->CountInsnInFunc("DisasmWriteGlob", insns)); 1512 1513 // TODO(kcc): implement these (needs just one __asan_report). 1514 EXPECT_EQ(2, o->CountInsnInFunc("DisasmParamReadIfWrite", insns)); 1515 EXPECT_EQ(2, o->CountInsnInFunc("DisasmParamIfReadWrite", insns)); 1516} 1517 1518// Currently we create and poison redzone at right of global variables. 1519char glob5[5]; 1520static char static110[110]; 1521const char ConstGlob[7] = {1, 2, 3, 4, 5, 6, 7}; 1522static const char StaticConstGlob[3] = {9, 8, 7}; 1523extern int GlobalsTest(int x); 1524 1525TEST(AddressSanitizer, GlobalTest) { 1526 static char func_static15[15]; 1527 1528 static char fs1[10]; 1529 static char fs2[10]; 1530 static char fs3[10]; 1531 1532 glob5[Ident(0)] = 0; 1533 glob5[Ident(1)] = 0; 1534 glob5[Ident(2)] = 0; 1535 glob5[Ident(3)] = 0; 1536 glob5[Ident(4)] = 0; 1537 1538 EXPECT_DEATH(glob5[Ident(5)] = 0, 1539 "0 bytes to the right of global variable.*glob5.* size 5"); 1540 EXPECT_DEATH(glob5[Ident(5+6)] = 0, 1541 "6 bytes to the right of global variable.*glob5.* size 5"); 1542 Ident(static110); // avoid optimizations 1543 static110[Ident(0)] = 0; 1544 static110[Ident(109)] = 0; 1545 EXPECT_DEATH(static110[Ident(110)] = 0, 1546 "0 bytes to the right of global variable"); 1547 EXPECT_DEATH(static110[Ident(110+7)] = 0, 1548 "7 bytes to the right of global variable"); 1549 1550 Ident(func_static15); // avoid optimizations 1551 func_static15[Ident(0)] = 0; 1552 EXPECT_DEATH(func_static15[Ident(15)] = 0, 1553 "0 bytes to the right of global variable"); 1554 EXPECT_DEATH(func_static15[Ident(15 + 9)] = 0, 1555 "9 bytes to the right of global variable"); 1556 1557 Ident(fs1); 1558 Ident(fs2); 1559 Ident(fs3); 1560 1561 // We don't create left redzones, so this is not 100% guaranteed to fail. 1562 // But most likely will. 1563 EXPECT_DEATH(fs2[Ident(-1)] = 0, "is located.*of global variable"); 1564 1565 EXPECT_DEATH(Ident(Ident(ConstGlob)[8]), 1566 "is located 1 bytes to the right of .*ConstGlob"); 1567 EXPECT_DEATH(Ident(Ident(StaticConstGlob)[5]), 1568 "is located 2 bytes to the right of .*StaticConstGlob"); 1569 1570 // call stuff from another file. 1571 GlobalsTest(0); 1572} 1573 1574TEST(AddressSanitizer, GlobalStringConstTest) { 1575 static const char *zoo = "FOOBAR123"; 1576 const char *p = Ident(zoo); 1577 EXPECT_DEATH(Ident(p[15]), "is ascii string 'FOOBAR123'"); 1578} 1579 1580int *ReturnsPointerToALocalObject() { 1581 int a = 0; 1582 return Ident(&a); 1583} 1584 1585#if ASAN_UAR == 1 1586TEST(AddressSanitizer, LocalReferenceReturnTest) { 1587 int *(*f)() = Ident(ReturnsPointerToALocalObject); 1588 int *p = f(); 1589 // Call 'f' a few more times, 'p' should still be poisoned. 1590 for (int i = 0; i < 32; i++) 1591 f(); 1592 EXPECT_DEATH(*p = 1, "AddressSanitizer stack-use-after-return"); 1593 EXPECT_DEATH(*p = 1, "is located.*in frame .*ReturnsPointerToALocal"); 1594} 1595#endif 1596 1597template <int kSize> 1598__attribute__((noinline)) 1599static void FuncWithStack() { 1600 char x[kSize]; 1601 Ident(x)[0] = 0; 1602 Ident(x)[kSize-1] = 0; 1603} 1604 1605static void LotsOfStackReuse() { 1606 int LargeStack[10000]; 1607 Ident(LargeStack)[0] = 0; 1608 for (int i = 0; i < 10000; i++) { 1609 FuncWithStack<128 * 1>(); 1610 FuncWithStack<128 * 2>(); 1611 FuncWithStack<128 * 4>(); 1612 FuncWithStack<128 * 8>(); 1613 FuncWithStack<128 * 16>(); 1614 FuncWithStack<128 * 32>(); 1615 FuncWithStack<128 * 64>(); 1616 FuncWithStack<128 * 128>(); 1617 FuncWithStack<128 * 256>(); 1618 FuncWithStack<128 * 512>(); 1619 Ident(LargeStack)[0] = 0; 1620 } 1621} 1622 1623TEST(AddressSanitizer, StressStackReuseTest) { 1624 LotsOfStackReuse(); 1625} 1626 1627TEST(AddressSanitizer, ThreadedStressStackReuseTest) { 1628 const int kNumThreads = 20; 1629 pthread_t t[kNumThreads]; 1630 for (int i = 0; i < kNumThreads; i++) { 1631 pthread_create(&t[i], 0, (void* (*)(void *x))LotsOfStackReuse, 0); 1632 } 1633 for (int i = 0; i < kNumThreads; i++) { 1634 pthread_join(t[i], 0); 1635 } 1636} 1637 1638#ifdef __EXCEPTIONS 1639__attribute__((noinline)) 1640static void StackReuseAndException() { 1641 int large_stack[1000]; 1642 Ident(large_stack); 1643 ASAN_THROW(1); 1644} 1645 1646// TODO(kcc): support exceptions with use-after-return. 1647TEST(AddressSanitizer, DISABLED_StressStackReuseAndExceptionsTest) { 1648 for (int i = 0; i < 10000; i++) { 1649 try { 1650 StackReuseAndException(); 1651 } catch(...) { 1652 } 1653 } 1654} 1655#endif 1656 1657TEST(AddressSanitizer, MlockTest) { 1658 EXPECT_EQ(0, mlockall(MCL_CURRENT)); 1659 EXPECT_EQ(0, mlock((void*)0x12345, 0x5678)); 1660 EXPECT_EQ(0, munlockall()); 1661 EXPECT_EQ(0, munlock((void*)0x987, 0x654)); 1662} 1663 1664// ------------------ demo tests; run each one-by-one ------------- 1665// e.g. --gtest_filter=*DemoOOBLeftHigh --gtest_also_run_disabled_tests 1666TEST(AddressSanitizer, DISABLED_DemoThreadedTest) { 1667 ThreadedTestSpawn(); 1668} 1669 1670void *SimpleBugOnSTack(void *x = 0) { 1671 char a[20]; 1672 Ident(a)[20] = 0; 1673 return 0; 1674} 1675 1676TEST(AddressSanitizer, DISABLED_DemoStackTest) { 1677 SimpleBugOnSTack(); 1678} 1679 1680TEST(AddressSanitizer, DISABLED_DemoThreadStackTest) { 1681 pthread_t t; 1682 pthread_create(&t, 0, SimpleBugOnSTack, 0); 1683 pthread_join(t, 0); 1684} 1685 1686TEST(AddressSanitizer, DISABLED_DemoUAFLowIn) { 1687 uaf_test<U1>(10, 0); 1688} 1689TEST(AddressSanitizer, DISABLED_DemoUAFLowLeft) { 1690 uaf_test<U1>(10, -2); 1691} 1692TEST(AddressSanitizer, DISABLED_DemoUAFLowRight) { 1693 uaf_test<U1>(10, 10); 1694} 1695 1696TEST(AddressSanitizer, DISABLED_DemoUAFHigh) { 1697 uaf_test<U1>(kLargeMalloc, 0); 1698} 1699 1700TEST(AddressSanitizer, DISABLED_DemoOOBLeftLow) { 1701 oob_test<U1>(10, -1); 1702} 1703 1704TEST(AddressSanitizer, DISABLED_DemoOOBLeftHigh) { 1705 oob_test<U1>(kLargeMalloc, -1); 1706} 1707 1708TEST(AddressSanitizer, DISABLED_DemoOOBRightLow) { 1709 oob_test<U1>(10, 10); 1710} 1711 1712TEST(AddressSanitizer, DISABLED_DemoOOBRightHigh) { 1713 oob_test<U1>(kLargeMalloc, kLargeMalloc); 1714} 1715 1716TEST(AddressSanitizer, DISABLED_DemoOOM) { 1717 size_t size = __WORDSIZE == 64 ? (size_t)(1ULL << 40) : (0xf0000000); 1718 printf("%p\n", malloc(size)); 1719} 1720 1721TEST(AddressSanitizer, DISABLED_DemoDoubleFreeTest) { 1722 DoubleFree(); 1723} 1724 1725TEST(AddressSanitizer, DISABLED_DemoNullDerefTest) { 1726 int *a = 0; 1727 Ident(a)[10] = 0; 1728} 1729 1730TEST(AddressSanitizer, DISABLED_DemoFunctionStaticTest) { 1731 static char a[100]; 1732 static char b[100]; 1733 static char c[100]; 1734 Ident(a); 1735 Ident(b); 1736 Ident(c); 1737 Ident(a)[5] = 0; 1738 Ident(b)[105] = 0; 1739 Ident(a)[5] = 0; 1740} 1741 1742TEST(AddressSanitizer, DISABLED_DemoTooMuchMemoryTest) { 1743 const size_t kAllocSize = (1 << 28) - 1024; 1744 size_t total_size = 0; 1745 while (true) { 1746 char *x = (char*)malloc(kAllocSize); 1747 memset(x, 0, kAllocSize); 1748 total_size += kAllocSize; 1749 fprintf(stderr, "total: %ldM\n", (long)total_size >> 20); 1750 } 1751} 1752 1753#ifdef __APPLE__ 1754#include "asan_mac_test.h" 1755// TODO(glider): figure out whether we still need these tests. Is it correct 1756// to intercept CFAllocator? 1757TEST(AddressSanitizerMac, DISABLED_CFAllocatorDefaultDoubleFree) { 1758 EXPECT_DEATH( 1759 CFAllocatorDefaultDoubleFree(), 1760 "attempting double-free"); 1761} 1762 1763TEST(AddressSanitizerMac, DISABLED_CFAllocatorSystemDefaultDoubleFree) { 1764 EXPECT_DEATH( 1765 CFAllocatorSystemDefaultDoubleFree(), 1766 "attempting double-free"); 1767} 1768 1769TEST(AddressSanitizerMac, DISABLED_CFAllocatorMallocDoubleFree) { 1770 EXPECT_DEATH(CFAllocatorMallocDoubleFree(), "attempting double-free"); 1771} 1772 1773TEST(AddressSanitizerMac, DISABLED_CFAllocatorMallocZoneDoubleFree) { 1774 EXPECT_DEATH(CFAllocatorMallocZoneDoubleFree(), "attempting double-free"); 1775} 1776 1777TEST(AddressSanitizerMac, GCDDispatchAsync) { 1778 // Make sure the whole ASan report is printed, i.e. that we don't die 1779 // on a CHECK. 1780 EXPECT_DEATH(TestGCDDispatchAsync(), "Shadow byte and word"); 1781} 1782 1783TEST(AddressSanitizerMac, GCDDispatchSync) { 1784 // Make sure the whole ASan report is printed, i.e. that we don't die 1785 // on a CHECK. 1786 EXPECT_DEATH(TestGCDDispatchSync(), "Shadow byte and word"); 1787} 1788 1789 1790TEST(AddressSanitizerMac, GCDReuseWqthreadsAsync) { 1791 // Make sure the whole ASan report is printed, i.e. that we don't die 1792 // on a CHECK. 1793 EXPECT_DEATH(TestGCDReuseWqthreadsAsync(), "Shadow byte and word"); 1794} 1795 1796TEST(AddressSanitizerMac, GCDReuseWqthreadsSync) { 1797 // Make sure the whole ASan report is printed, i.e. that we don't die 1798 // on a CHECK. 1799 EXPECT_DEATH(TestGCDReuseWqthreadsSync(), "Shadow byte and word"); 1800} 1801 1802TEST(AddressSanitizerMac, GCDDispatchAfter) { 1803 // Make sure the whole ASan report is printed, i.e. that we don't die 1804 // on a CHECK. 1805 EXPECT_DEATH(TestGCDDispatchAfter(), "Shadow byte and word"); 1806} 1807 1808TEST(AddressSanitizerMac, GCDSourceEvent) { 1809 // Make sure the whole ASan report is printed, i.e. that we don't die 1810 // on a CHECK. 1811 EXPECT_DEATH(TestGCDSourceEvent(), "Shadow byte and word"); 1812} 1813 1814TEST(AddressSanitizerMac, GCDSourceCancel) { 1815 // Make sure the whole ASan report is printed, i.e. that we don't die 1816 // on a CHECK. 1817 EXPECT_DEATH(TestGCDSourceCancel(), "Shadow byte and word"); 1818} 1819 1820TEST(AddressSanitizerMac, GCDGroupAsync) { 1821 // Make sure the whole ASan report is printed, i.e. that we don't die 1822 // on a CHECK. 1823 EXPECT_DEATH(TestGCDGroupAsync(), "Shadow byte and word"); 1824} 1825 1826void *MallocIntrospectionLockWorker(void *_) { 1827 const int kNumPointers = 100; 1828 int i; 1829 void *pointers[kNumPointers]; 1830 for (i = 0; i < kNumPointers; i++) { 1831 pointers[i] = malloc(i + 1); 1832 } 1833 for (i = 0; i < kNumPointers; i++) { 1834 free(pointers[i]); 1835 } 1836 1837 return NULL; 1838} 1839 1840void *MallocIntrospectionLockForker(void *_) { 1841 pid_t result = fork(); 1842 if (result == -1) { 1843 perror("fork"); 1844 } 1845 assert(result != -1); 1846 if (result == 0) { 1847 // Call malloc in the child process to make sure we won't deadlock. 1848 void *ptr = malloc(42); 1849 free(ptr); 1850 exit(0); 1851 } else { 1852 // Return in the parent process. 1853 return NULL; 1854 } 1855} 1856 1857TEST(AddressSanitizerMac, MallocIntrospectionLock) { 1858 // Incorrect implementation of force_lock and force_unlock in our malloc zone 1859 // will cause forked processes to deadlock. 1860 // TODO(glider): need to detect that none of the child processes deadlocked. 1861 const int kNumWorkers = 5, kNumIterations = 100; 1862 int i, iter; 1863 for (iter = 0; iter < kNumIterations; iter++) { 1864 pthread_t workers[kNumWorkers], forker; 1865 for (i = 0; i < kNumWorkers; i++) { 1866 pthread_create(&workers[i], 0, MallocIntrospectionLockWorker, 0); 1867 } 1868 pthread_create(&forker, 0, MallocIntrospectionLockForker, 0); 1869 for (i = 0; i < kNumWorkers; i++) { 1870 pthread_join(workers[i], 0); 1871 } 1872 pthread_join(forker, 0); 1873 } 1874} 1875 1876void *TSDAllocWorker(void *test_key) { 1877 if (test_key) { 1878 void *mem = malloc(10); 1879 pthread_setspecific(*(pthread_key_t*)test_key, mem); 1880 } 1881 return NULL; 1882} 1883 1884TEST(AddressSanitizerMac, DISABLED_TSDWorkqueueTest) { 1885 pthread_t th; 1886 pthread_key_t test_key; 1887 pthread_key_create(&test_key, CallFreeOnWorkqueue); 1888 pthread_create(&th, NULL, TSDAllocWorker, &test_key); 1889 pthread_join(th, NULL); 1890 pthread_key_delete(test_key); 1891} 1892#endif // __APPLE__ 1893 1894int main(int argc, char **argv) { 1895 progname = argv[0]; 1896 testing::GTEST_FLAG(death_test_style) = "threadsafe"; 1897 testing::InitGoogleTest(&argc, argv); 1898 return RUN_ALL_TESTS(); 1899} 1900